WO1999065591A1

WO1999065591A1 - Device for separating and retaining fluid-suspended magnetic particles

Info

Publication number: WO1999065591A1
Application number: PCT/MX1999/000017
Authority: WO
Inventors: Raúl Roberto PRUNEDA GUERRA
Original assignee: Pruneda Guerra Raul Roberto
Priority date: 1998-06-19
Filing date: 1999-06-18
Publication date: 1999-12-23

Abstract

The present invention relates to a device for retaining and separating fluid-suspended magnetic particles, the device comprising a filter for a conventional internal combustion engine which includes inlet and outlet means, as well as internal filtration means; the device has at least one arrangement of magnetic means for the separation and retention of magnetic particles, said assembly being located inside the filter and whose function is to catch and retain magnetic particles which circulate suspended in a fluid.

Description

"DEVICE FOR SEPARATING AND RETAINING MAGNETIC PARTICLES

SUSPENDED IN FLUIDS "

FIELD OF THE INVENTION

The present invention is related to the techniques for the separation and filtration of suspended particles in fluids, which make it possible to eliminate magnetic impurities that carry with them the fluids and, more particularly, is related to a device for separating and retaining magnetic particles suspended in fluids.

BACKGROUND OF THE INVENTION

At present there are various systems and procedures for the separation of particles, either to separate particles with different sizes of granulometry, filtration or sedimentation methods, or to separate particles that are considered as impurities where separation can be carried out. both dry and wet.

With regard to the separation of magnetic particles, there are various devices in the current art that, by means of magnetic fields, separate magnetic particles from non-magnetic particles.

The use of separators that include magnetic means in their operation has been known for a long time in the industry, such is the case of Mexican Patent No. 143,256 in which improvements to a magnetic separator for treating finely divided minerals are described. The separator claimed in this patent includes one or more groups of grooved plates (fixed or mobile), among which the product circulates, the improvements being characterized in that said plates forming the induced bodies are grooved on both sides.

Likewise, improvements in a magnetic particle separating apparatus are described in Mexican Patent No. 148,670, which includes a magnet positioned and designed in such a way as to produce a large radial magnetic field force compared to axial field force. , and a dispenser for supplying a mixture of materials with magnetic and non-magnetic particles, the improvements being characterized in that the magnet comprises at least two superconducting coils. placed on top of each other and wound in directions opposite, so that the axial force field is less than that of gravity, whereby the magnetic particles are deflected from their oπginal path to the

Similarly, Mexican Patent No. 172,887 describes a high intensity magnetic separator that works wet in which the means that produce the magnetic field are constituted by permanent magnets eventually associated with polar pieces in addition to including means to displace said magnets.

However, these devices that are already lowered, are very sophisticated equipment that have the disadvantage of having been specially designed for large-scale application in multi-plant plants, where the quantities of material handled are much higher than the amount of magnetic particles that they can carry fluids with them, so that their application for such purpose will be impossible

On the other hand it is well known that internal combustion engines use oils and lubricants to maintain the proper functioning of the engine and the elements that constitute it. These oils serve as a means of lubrication in order to attenuate the friction between the elements that make up the engine , reducing wear as well as dissipating the heat generated by the use and the constant rubbing between said elements

The elements that make up the engine are mostly made of metallic materials, which, with wear, wear away, so that ferrous particles or filings of different sizes and shapes are generated inside the engine. which remain in suspension and are dragged by the lubricating fluid making them circulate through all the internal elements of the engine, in such a way that some of them get to deposit on the surfaces of the pieces that work against each other, thereby causing that the wear between them is much faster and more severe, so that the life of the engine and / or its parts decreases dramatically

Another problem that exists due to contamination of magnetic particles is that presented in the metallic pipes that serve to drive the water coming from the municipal network, either water for domestic use, or water for industrial use, since, in the internal walls of these pipes, iron oxide inlays eventually form, which are subsequently dragged by the fluid to the reservoirs where the water is stored before use

To inject or raise the water from the tank to the place where it will be used, pumps are used for this purpose which, like the engines of internal combustion, they wear out with the use If to this normal wear of the pumps, we add the effects of premature wear caused by the inlaying of iron oxides or filings that are deposited on the parts of the pumps that act against each other , the life of these pumps is reduced by a high percentage, thereby causing economic losses, which affect both family spending and the profits of companies

Unfortunately not everything stops there, since, in the case of water for domestic use, even though there is a wide variety of filters that are mainly used to retain solid particles in suspension, they have moderately satisfied the problem of contamination by magnetic particles, since as mentioned above, iron oxides and filings that circulate along with water, have particle sizes smaller than the pore size of said filters, not being retained within the filter and, therefore, , being consumed by the human being, which greatly affects their health With regard to the use of industrial water, the aforementioned iron oxides and filings can affect industrial processes, or affect equipment, whose repair can become too burdensome for the industrialist

Likewise, the internal wear of some types of pipes caused by the flow velocity, its turbulence, as well as the characteristics or conditions of the fluid in process, such as temperature, pressure, corrosion index, etc., causing the existence of magnetic particles that are dragged by the flow, being suspended therein, so another of the cases that occurs due to contamination of magnetic particles, is the deposition and sedimentation of magnetic particles caused by the wear of the internal walls of the containers or storage tanks, as is the specific case of Gas L, causing in the same way as in the case of water, embedding in the supply pipes, as well as decreasing the efficiency of the accesses of the system, such as valves, regulators and pumps among others

Therefore, it is necessary to separate these magnetic particles in a way that is as efficiently and economically as possible, since otherwise, as mentioned above, the normal wear caused by friction between the internal elements that constitute the equipment, together with the particles that are in suspension in the fluid, cause greater wear on said elements of the equipment, increasing the internal temperature of the equipment due to the heat generated by friction and the deposition of said solids in the elements that require an exact adjustment, or a continuous activity as is the case in fittings and pipes; without letting the existing contamination in stored fluids pass through due to the large number of particles suspended in it, thus reducing the useful life of the equipment, and therefore its efficiency and service. As a result of the above, it has been sought to solve the above inconveniences in a simple, practical and economical way, developing a device to separate and retain magnetic particles suspended in fluids, which in addition to being easy to use, allows to ensure adequate retention and separation of the magnetic particles that circulate in suspension in the fluids, and that by their size manage to pass through the commercial filters, thereby reducing the useful life of the equipment.

OBJECTS OF THE INVENTION

Taking into account the defects of the prior art, it is an object of the present invention to provide a device for separating and retaining magnetic particles suspended in fluids, of extremely simple, practical and economical construction, and yet of high separation and retention efficiency. of magnetic particles that circulate in suspension in the fluids. It is another object of the present invention, to provide a device for separating and retaining magnetic particles suspended in fluids, which allows their use and application in different equipment, such as, among others, internal combustion engines, pumps for injecting or raising water, pipes and LP gas storage tanks, etc. It is still another object of the present invention, to provide a device for separating and retaining magnetic particles suspended in fluids, which by separating and retaining said magnetic particles allows to improve the operation of all the elements that constitute the equipment, and therefore, allow extend the life of this equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

The novel aspects that are considered characteristic of the present invention will be established with particularity in the appended claims. However, the operation, together with other objects and advantages thereof, is you will understand better in the following detailed description of certain modalities, when read in relation to the attached drawings, in which:

Figure 1 is a front elevation view in longitudinal sectional section of a device for separating and retaining magnetic particles suspended in fluids, showing the location of the magnetic separation and retention means, constructed in accordance with the principles of a modality specific to the present invention.

Figure 2 is a bottom plan view of the device shown in Figure 1, constructed in accordance with the principles of the present invention. Figure 3 is a front elevation view of the magnetic particle separation and retention means, constructed in accordance with the specific embodiment of the present invention.

Figure 4 is a front elevation view in longitudinal sectional section of the device for separating and retaining magnetic particles suspended in fluids, constructed in accordance with a second embodiment of the present invention.

Figure 5 is a front elevation view of the magnetic particle separation and retention means, constructed in accordance with the second embodiment of the present invention.

Figure 6 is a front elevation view in longitudinal sectional section of the device for separating and retaining magnetic particles suspended in fluids, constructed in accordance with a third embodiment of the present invention.

Figure 7 is a front elevation view of the magnetic particle separation and retention means, constructed in accordance with the third embodiment of the present invention.

DETAILED DESCRIPTION

It should be noted that the device for separating and retaining magnetic particles suspended in fluids of the present invention is ideal for use in any equipment in which it is required to separate said magnetic particles, such as, inter alia, internal combustion engines, pumps for injecting or raising water, pipes for conduction and supply of fluids, storage tanks for said fluids, etc., preferably being used in the mode described in the internal combustion engines of motor vehicles, since, by removing the magnetic particles from the fluid, allows lubrication to be carried out in a way more efficient, reducing wear and tear between parts and thereby extending engine life.

Referring in particular to the accompanying drawings, and more specifically to Figures 1 to 3 thereof, there is shown a device 100 for separating and retaining magnetic particles suspended in fluids, constructed in accordance with a particularly preferred embodiment of the present invention, which should be considered only as illustrative, but not limiting thereof.

The device 100 described and shown in Figures 1 to 3, generally comprises an oil filter 101 of the conventional type that is installed in the motor of motor vehicles, whose function is to filter and retain particles solids that carry the fluid in suspension; and, at least one arrangement of magnetic means 102 located inside the filter 101, whose function is to trap and retain the magnetic particles circulating in suspension in said fluid.

The filter 101 described comprises a main body 103 preferably cylindrical, closed at its two ends and hollow inside, which includes in its lower end input means 104 and output means 105, wherein the input means 104 include a plurality of holes distributed around the outlet means 105 and equidistant apart from each other, to allow the entry of the fluid and remove impurities, the outlet means 105 includes a centrally located hole to allow the fluid to exit the device 100 , already free of impurities; a cylindrical body 106 centrally located inside the main body 103, which includes a plurality of holes 107 symmetrically distributed and equidistant apart from each other, located throughout the surface of said cylindrical body 106 and traversing it from side to side, whose function is that of allowing the fluid, which has passed through the filtration means 108, to flow to the central part of the device 100 passing through the magnetic means 102 for separating and retaining magnetic particles circulating along with the fluid, separating and retaining said magnetic particles, to subsequently leave the device 100 towards the motor; filtration means 108 located inside the main body 103 and diametrically surrounding the cylindrical body 106 in such a way as to completely wrap it, said filtration means 108 being able to be filter paper with certain porosity, such that by passing the fluid through from it, retain in its breast all those solid impurities whose diameter is greater than the diameter of the pores of the filter paper and which are suspended in said fluid. Both the cylindrical body 106 and the filtration means 108 are connected by the upper part to a cover 109 and the lower part to a base (not shown in the figure), so that they form a single piece that occupies approximately all the interior space of the main body 103 of the filter 101 As mentioned above, the at least one arrangement of magnetic means 102 is housed within the filter 101 which is located inside the cylindrical body 106 and comprises at least one element magnetic or magnet 110

In the specific embodiment described by the arrangement of magnetic means 102, it is preferably located in the upper part of the filter 101, connected to the upper cover 109 through a cylindrical element 115 which is connected to the lower part of said cover 109 , as shown in Figure 1 Said arrangement of magnetic means 102 preferably comprises a pair of magnetic elements or magnets 110 and 111, which can take on any geometric shape and size, preferably adopting in the embodiment described the shape of a disk, and are separated from the cylindrical body 115 and from each other by non-magnetic separators 112 and 113, respectively as shown in Figure 3

The attachment of the arrangement of the magnetic means 102 to the upper cover 109 can be carried out by any means appropriate for this, preferably using the welding method to achieve such a union. As is well known, the attraction force of the magnets it is greater at the ends or poles than at the center, which is why magnetic separators 114 are placed at each of the ends or poles of the magnetic elements 110 and 111 which prevent the magnetic field generated by one of the magnets from interfering with the magnetic field of the other, since otherwise the magnetic force of the magnetic means 102 would be considerably reduced

The magnetic elements 110 and 111 must have sufficient magnetic force to attract and retain on their surface the magnetic particles that the fluid carries in suspension

Non-magnetic separators can be manufactured in any matenal that does not have magnetic properties, such as among other plastic materials, wood, cardboard, etc., preferably used in the mode described in a plastic material.

Similarly, to achieve the bond between the magnetic elements 112 and 113 and the magnetic separators 114, any adhesive or glue useful for this, preferably being used in the mode described epoxy rubber.

When the internal combustion engine is in operation, the dirty lubricating fluid that comes from the greasing circuit enters the device 100 through the inlet means 104, this dirty fluid passes through the filtration means 108 where the filter paper, such that said filtration means 108 retain within it the solid particles in suspension that carry the fluid; said fluid once it has passed through the filtration means 108, is introduced into the cylindrical body 106 through the plurality of holes 107, once inside the body 106, the fluid flows in the opposite direction to the inlet flow direction of said fluid, passing where the magnetic means 102 for separating and retaining magnetic particles are placed, such that said magnetic means 102 separate and retain all those magnetic particles that by their size have not been trapped in the filtration means 108, so that the fluid finally leaves the device 100 towards the engine through the outlet means 105, but now free of solid magnetic particles that may affect the life of the engine.

With more particular reference now to Figures 4 and 5, there is shown a device 200 for separating and retaining magnetic particles suspended in fluids, constructed in accordance with a second embodiment of the present invention, which in general terms comprises an oil filter 201 of the conventional type, whose structural and functional characteristics are identical to the filter 101 of the device 100 described above; and, at least one arrangement of magnetic means 202 for separation and retention of magnetic particles, located inside the filter 201.

In the second embodiment described, the at least one arrangement of magnetic means 202, can be found located anywhere inside the cylindrical body 203, preferably being located at the bottom and resting on the inner walls of said cylindrical body 203 , and comprises at least one magnetic element or magnet.

The arrangement of magnetic means 202 described in the second embodiment and shown in Figure 5 preferably comprises two magnetic elements or magnets 204 and 205, located adjacent to each other, firmly held within a frame 206, occupying approximately the upper half of said frame 206. Additionally, each of said magnetic elements 204 and 205, includes a pair of magnetic separators 207 located at the upper and lower end of each of said magnetic elements 204 and 205, respectively. The magnetic elements 204 and 205 may take any geometric shape and size in the second embodiment described, preferably taking the form of a ring.

The magnetic separators 207 described in said second embodiment are preferably in the form of a washer, whose outer diameter is approximately equal to the outer diameter of the magnetic elements 204 and 205 and the inner diameter is approximately greater than the inner diameter of said magnetic elements 204 and 205 Said magnetic separators 207 may be manufactured in any magnetic material, preferably manufactured in said second embodiment described in a steel material, of the type commercially known as

"cold roH", and for appearance purposes preferably include a coating, which in said second mode to be removed is a galvanized coating

Additionally, each of the magnetic elements 204 and 205 preferably includes a coating of acrylic, enamel or lacquer paint, whose function is to serve as a polisher, in addition to allowing the cleaning of said magnetic means.

As mentioned before, the magnetic separators 207, prevent the magnetic field generated by one of the magnetic elements or magnets from interfering with the other's magnetic field, since otherwise the magnetic force of the magnetic means 202 would be considerably reduced, and they could not carry out their function of retaining and separating the magnetic particles that circulate in suspension in the fluids

The frame 206 is formed by a plurality of bars 208 located perpendicular to the central axis of the magnetic elements 204 and 205, said perpendicular bars 208 being joined through two stop elements having a preferably ring shape, a first stop element upper 209 and a second stopper element mfeπor 210, of which the upper stopper element 209 having an outer diameter and a thickness approximately smaller than the outer diameter and thickness, respectively, of the lower stopper element 210 The inner diameter of both stop elements 209 and 210 being approximately greater than the mteπor diameter of the magnetic elements 204 and 205

The outer diameter of the frame 206 is approximately smaller than the inner diameter of the cylindrical body 203, such that the arrangement of magnetic means 202 can be inserted under pressure, resting it on the inner walls of said body αlindπco 203 The frame 206 can be manufactured in any non-metallic material, preferably manufactured in a nyion plastic material with fiberglass loading. Now referring more particularly to Figures 6 and 7, there is shown a device 300 for separating and retaining magnetic particles. suspended in fluids, constructed in accordance with a third embodiment of the present invention, which in general terms comprises an oil filter 301 of the conventional type, whose structural and functional characteristics are identical to the filter 101 of the device 100 described above, a first arrangement of magnetic means 302 located inside the filter 301 preferably at the top of said filter 301, for the separation and retention of magnetic particles, and, a second arrangement of magnetic means 303 located inside the filter 301

In the third embodiment described, the first arrangement of magnetic media 302 is of structural and functional characteristics identical to the arrangement of magnetic media 102 of the device 100 described above. The attachment of the first arrangement of magnetic media 302 to the top cover

304 can be carried out by any means appropriate for this, preferably using in the third embodiment welding is achieved to achieve said joint

The second arrangement of magnetic means 303, as mentioned above, is located within the filter 300 preferably at the bottom and supported on the inner walls of the cylindrical body 305, and comprises at least one magnetic element or magnet

The second arrangement of magnetic means 303 described in the third embodiment and shown in Figure 7, comprises a first magnetic element or magnet 306 and a second magnetic element 307, located vertically opposite each other, so that their central axis is perpendicular to the central axis of the device 300, being firmly held within a frame 308 Additionally, each of said magnetic elements 306 and 307, includes a pair of magnetic separators 309 located at the right and left end of each of said magnetic elements 306 and 307, respectively

The magnetic elements 306 and 307 can take any geometric shape and size, in the second modality described preferably adopting the shape of a disk

The magnetic separators 309 described in said third embodiment are preferably disk-shaped, whose diameter is approximately equal to the diameter of the magnetic elements 306 and 307 Said magnetic separators 309 can be manufactured in any magnetic material, preferably being manufactured in said second modality that is disclosed in a steel material, of the type that is commercially known as "cold roll", and for Apaqenαa effects preferably include a coating, which in said third embodiment described, is a galvanized coating

In addition, each of the magnetic elements 306 and 307 preferably includes a coating of acrylic, enamel or lacquer paint, which serves as a polisher, in addition to allowing the cleaning of said magnetic means. Frame 308 is formed by a plurality of bars 310 located parallel to the central axis of the magnetic means 303, said perpendicular bars 310 being joined through a plurality of stop elements having a preferably ring shape, a first stop element 311, a second stop element 312, a third stop element 313 and a fourth stop element 314, of which the first element 311 and the second stop element 312 firmly hold the first magnetic element 306 and the third stop element 313 and the fourth stop element 314 firmly hold the second magnetic element 307

The stop elements 312 and 313 have an outside diameter approximately smaller than the outside diameter of the stop elements 311 and 314 The outside diameter of the stop elements 311 and 314 being approximately equal to the diameter of the magnetic elements 306 and 307

The length of the frame 308 is approximately smaller than the inside diameter of the cylindrical body 305, such that the arrangement of magnetic means 303 can be pressurized inside and supported on the inner walls of said cylindrical body 305.

The frame 303 can be manufactured in any non-metallic material, preferably manufactured in a nylon plastic matte with fiberglass load. It should be noted that the arrangement of magnetic means described in said third modality can be used efficiently in equipment that conducts or supplies fluids. gaseous fuels, since, by the arrangement of the second arrangement of the magnetic means 303, a magnetic field is formed that allows the carbon molecules to be oriented such that at the time of combustion, it is more efficient, in addition to allowing retention and separation of magnetic particles As a further embodiment of the device for separating and retaining magnetic particles of the present invention, said device may include a plastic magnet sheet which is preferably located between the inner wall of the filter and the filtration means, completely surrounding said means of filtration, in such a way that since the fluid enters the device, the magnetic particles begin to separate, trying to prevent the pores of said filtration means from clogging and at the same time, allowing the useful life of said media to be extended filtration and the device itself

The operation and efficiency of the device of the present invention will be more clearly illustrated by means of the following example, which is presented for illustrative and non-limiting purposes only.

EXAMPLE

A test was carried out on the device to separate and retain magnetic particles suspended in fluids, to determine the percentage of magnetic particles that are retained, and for this, 1 0 gram of metal particles with a particle size of approximately 0 1 was added at approximately 80 microns to a viscous fluid similar to a lubricating oil, which was circulated through the device at the working temperature and pressure of an automotive engine

According to the previous test, the percentage of particles removed from the fluid was: 98.35%.

As you can see from the result, the efficiency of the device to separate and retain magnetic particles is almost 100%

In accordance with the foregoing description, it will be noted that the device of the present invention has been devised to separate and retain magnetic particles that are suspended in fluids, allowing the fluid to circulate through an internal combustion engine, or the fluid that is injected or evicted by a pump, well, the fluid that is stored in a tank, is free of magnetic particles, improving efficiency, and thus extending the useful life of the equipment and its parts, and it will be evident for any person skilled in the art that the modalities of the device for separating and retaining magnetic particles of the present invention are described above and illustrated in the accompanying drawings, are only illustrative but not limiting of the present invention, since they are possible numerous changes of consideration in its details without departing from the scope of the invention

It should be mentioned that the device for separating and retaining magnetic particles of the present invention may undergo different changes, such as, among others, the arrangement and number of arrangements of magnetic media, the number of magnetic elements and the shape thereof, the means of union of the magnetic elements, etc.

Even though certain embodiments of the invention have been illustrated and described, it should be emphasized that numerous modifications to them are possible,

Therefore, the present invention should not be considered as restricted except as required by the prior art and by the spirit of the appended claims.

Claims

NOVELTY OF THE INVENTION REIVINDICATIONS

1. A device for retaining and separating magnetic particles suspended in fluids, comprising a filter of the conventional type that includes inlet and outlet means, as well as filtration means inside, characterized in that said device includes at least one arrangement of magnetic means for separating and retaining magnetic particles located inside said conventional filter, whose function is to trap and retain the magnetic particles that circulate in suspension in the fluid.

2. A device for retaining and separating magnetic particles suspended in fluids, according to claim 1, further characterized in that the arrangement of magnetic means comprises at least one magnetic element or magnet, separated by non-magnetic separators, which can adopt any shape and size, preferably adopting the shape of a disk.

3. A device for retaining and separating magnetic particles suspended in fluids, according to claim 2, further characterized in that the magnetic elements and non-magnetic separators are joined together using an adhesive, preferably epoxy rubber.

4. A device for retaining and separating magnetic particles suspended in fluids, according to claim 2, further characterized in that the magnetic means are fixed inside the filter media, using any appropriate means of attachment for said purpose, preferably using welding.

5. A device for retaining and separating magnetic particles suspended in fluids, according to claim 1, further characterized in that the arrangement of magnetic means is preferably located at the bottom and supported on the internal walls of the cylindrical body.

6. A device for retaining and separating magnetic particles suspended in fluids, according to claim 5, further characterized in that the arrangement of magnetic means comprises two magnetic elements or magnets that can take any geometric shape and size, preferably adopting the form of a ring, located adjacent to each other, firmly secured within a frame, occupying approximately the upper half of said frame, said two magnetic elements include a pair of magnetic separators located at the upper and lower end of each of said magnetic elements.

7. A device for retaining and separating magnetic particles suspended in fluids, according to claim 6, further characterized in that the frame is formed by a plurality of bars located perpendicular to the central axis of the magnetic means said perpendicular bars being joined through of two stop elements preferably having the shape of a ring, a first upper stop element and a second lower stop element, of which the upper stop element having an outer diameter and a thickness approximately smaller than the outer diameter and thickness, respectively, of the lower stopper element, the inner diameter of both upper stopper and lower elements being approximately greater than the inner diameter of the magnetic elements; the outer diameter of the frame is approximately smaller than the inner diameter of the cylindrical body, such that the arrangement of magnetic means can be pressurized into said cylindrical body.

8. A device for retaining and separating magnetic particles suspended in fluids, according to claim 6, further characterized in that the magnetic separators are preferably washer-shaped, whose outer diameter is approximately equal to the outer diameter of the magnetic elements and diameter inside is approximately larger than the inside diameter of said magnetic elements.

9. A device for retaining and separating magnetic particles suspended in fluids, according to claim 1. further characterized in that the device comprises a first arrangement of magnetic means located in the upper part of the cylindrical body and a second arrangement of magnetic means located in the lower part of said cylindrical body.

10. A device for separating and retaining magnetic particles suspended in fluids, further characterized in that the second arrangement of magnetic means comprises a first magnetic element and a second magnetic element, located vertically opposite each other, such that its central axis is perpendicular to the central axis of the device, being able to adopt any geometric shape and size, preferably adopting the shape of a disk, being firmly attached within a framework, said magnetic elements including a pair of magnetic separators located at the right and left end of each of said magnetic elements

11 - A device for retaining and separating magnetic particles suspended in fluids according to claim 10, further characterized in that the frame is formed by a plurality of bars located parallel to the central axis of the magnetic means said perpendicular bars being joined through a plurality of stop elements preferably having the shape of a ring, a first stop element, a second stop element, a third stop element and a fourth stop element, of which the first and second stop elements hold to the first magnetic element and the second and third stop elements hold the second magnetic element, said second and third stop elements having an outer diameter approximately smaller than the outer diameter of the first and fourth stop elements, the outer diameter of the first , second third and fourth stop elements being approximately equal to the diam other than the first and second magnetic elements, the length of the frame being approximately smaller than the inside diameter of the cylindrical body, such that the second arrangement of magnetic means can be inserted under pressure and supported within the filter

12 - A device for retaining and separating magnetic particles suspended in fluids, according to claim 10, further characterized in that the magnetic separators are preferably disk-shaped, whose outer diameter is approximately equal to the outer diameter of the first and second magnetic elements ,