RU2611420C1 - Device for connector sealing and method for detachable chamber sealing - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: device consists of several parts made from elastic sealing material, such as rubber, when aligning the parts the sealable cavity is formed, in which the sealing connector is placed. When aligning the device parts, some parts are partially included in the others. The elastic sealing material of some parts is stretched, and of the others is compressed, sealing the place of their aligning. The shape of the inner cavity formed by the parts of detachable chamber (1) reproduces the shape of the sealing connector (3), so that there is practically no air between the elastic sealable material of the device, so that the compressible parts of the device are not wrinkled under the pressure of stretched parts at them.

EFFECT: creating of inexpensive and reliable device for sealing electrical and fiber optical connectors.

5 cl, 8 dwg

Description

The present invention relates to a sealed protective chambers and, in particular, can be used to seal the connectors.

A sealed communication connector is known from the prior art (utility model description to patent RU 145054 U1, publ. 09/10/2014) containing plug and socket parts that are hermetically connected to each other. The device is a sealed electrical connector. The sealing of this device is achieved through a combination of inelastic and elastic materials in its design.

The disadvantage of this device is the high cost due to the complexity of the design. In addition, the wires to the contacts of the plug and socket parts of the device are connected during its manufacture. The design of the device does not provide for their replacement, which limits the use of the device, for example, it cannot be installed in the place of a cable break without additional sealing of the joints of the cable wires with the wires of the known device.

The closest analogue of the first invention of the claimed group of inventions is the device described in paragraph 9 of the claims "Sealing materials with microspheres as a filler" (Description of the invention to patent RU 2365012 C2, publ. 20.08.2009). The sealing device consists of a detachable chamber, which when closed forms an internal cavity, a sealing material placed in the internal cavity of the detachable chamber and consisting of a silicone gel and an elastic microsphere filler. When closing the detachable chamber, the sealing material is effectively compressed and seals the detachable chamber.

The disadvantage of this device is the complexity of manufacture and high cost, since the body of the device must be made of durable waterproof material in the form of wings, parts of the body must be tightly fitted to each other. In addition, the device cannot be used when sealing other devices with open cavities and channels, since the sealing material can get into them and lead to malfunction.

The problem solved by the first invention of the group, connected by a single inventive concept of technical solutions, and the technical result achieved are to create another technical solution - an inexpensive and reliable device for sealing known connectors. For example, a variety of connectors are available for electrical and fiber optic connections that are reliable and inexpensive, but not leakproof. The proposed technical solution allows for well-known connectors to create inexpensive and reliable sealing devices.

To solve the problem and achieve the claimed technical result, a device for sealing a connector is used, consisting of a detachable chamber forming an inner cavity that is sealed when closing, characterized in that the shape of the inner cavity of the closed detachable chamber repeats the shape of the sealable connector, the detachable camera is made of two or more parts from an elastic sealing material, when closing the detachable chamber, its parts partially fit tightly into one another, while the elastic The sealing material of some parts is stretched, while the other is compressed, sealing the place of their connection, and the sealed input of the switched wires and (or) cables is carried out through the holes in the elastic material to be sealed and sealed when the elastic sealing material is sealed around the wires and (or) cables.

Besides:

- on the details of the detachable chamber to be closed, to hold them relative to each other after closing, there is a lock in the form of a protrusion on one part and a depression on the other part, when the detachable chamber is closed, the protrusion enters the depression and keeps the detachable chamber from opening;

- elastic sealing material at the entry point of the connected wires and (or) cables is restrained by the cuff or pulled together by a clamp;

- a water-repellent gel is embedded in the internal cavity of the closable detachable chamber.

There are various methods of sealing detachable chambers using elastic sealing material. From the existing level of technology the invention is known: "Tape for closing an object, a shutter and a method for forming a shutter" (Description of the invention to patent RU 2254653 C2, publ. 06/20/2005). The sealing method in the known solution is used to seal cable splice and is based on tight winding around it a tape of elastic sealing material. The method can be used to seal a detachable chamber.

The disadvantage of this method is the possibility of using it only for sealing durable detachable chambers, since each wound layer of tape exerts additional pressure on the detachable chamber and can lead to its deformation.

The closest analogue of the second invention of the claimed group of inventions is the sealing method described in paragraph 1 of the claims "Sealing materials with microspheres as a filler" (Description of the invention to patent RU 2365012 C2, publ. 20.08.2009). The method of sealing consists in placing a sealing material in the chamber to be sealed and compressing the sealing material when closing the detachable chamber.

The disadvantage of this method of sealing is its inapplicability in the case of sealing devices with open cavities and channels, so the sealing material can leak into them and lead to malfunction of the device. In addition, the known method, expensive to implement, requires a certain complexity of the devices implementing it.

The problem solved by the second invention of the group and the technical result achieved are to create another method for sealing a detachable chamber, characterized by a simple and inexpensive implementation and suitable for sealing devices with open cavities and channels.

To solve the problem and achieve the claimed technical result, the method of sealing a detachable chamber, comprising compressing an elastic sealing material, is characterized in that the compression of the elastic sealing material is carried out by stretched elastic sealing material, and the elastic forces press the compressed and stretched elastic sealing materials to each other.

The invention is illustrated by drawings, which depict:

In FIG. 1 - standard electrical connector with switched wires and device parts for its sealing.

In FIG. 2 - standard electrical connector with switched wires and device parts for its sealing (in the context).

In FIG. 3 - placement of a standard electrical connector with switched wires in a device for sealing (in the context).

In FIG. 4 - sealing of a screw terminal block with wires.

In FIG. 5 - sealing of a screw terminal block with wires (sectional view).

In FIG. 6 - sealing of a screw terminal block with cables (sectional view).

In FIG. 7 is a photograph of parts of a sealing device and a known electrical connector before sealing.

In FIG. 8 is a photograph of a closed device for sealing.

The principle of sealing the connectors is illustrated by the example of sealing a well-known electrical connector - a spring terminal block from the company "WAGO". In FIG. 1 item 1 and 2 illustrate two details of a lockable detachable camera - box pos. 1 with holes for the entry of wires pos. 10 and the cover pos. 2. Pos. 3 illustrates a known electrical patch cord connector. 4. Boxing pos. 1 and cover pos. 2 are made of elastic sealing material, for example rubber or silicone. Landing size of the cover pos. 2 smaller boxing poses. 1 so that the lid when the box is closed is in a stretched state, and the box is in a compressed state. The internal cavity of the boxing pos. 1 repeats the shape of the electrical connector, as illustrated in FIG. 2.

The sealing of the electrical connector consists in placing it, together with the switched wires, in a closed detachable chamber formed by boxing pos. 1 and the cover pos. 2 - FIG. 3. Switched wires pos. 4 are first threaded through the holes in the box pos. 10 and are switched by the electric connector pos. 3, then the electrical connector along with the wires slides into the box pos. 1, after which the cap is put on. The internal cavity of the box repeats the shape of the electrical connector, so there is no air between it and the walls of the box, due to which, when the box is closed with a lid, despite the fact that the lid is stretched and compresses the box, the box walls do not wrinkle inward. The elastic sealing material of the box, compressed by the lid, is elastically deformed, while the elastic force presses it against the lid. The elastic sealing material of the lid, stretched by the box, is elastically deformed, while the force of elasticity presses it to the box. Thus, the elastic forces in the elastic sealing materials of the box and the lid are aimed at pressing them against each other. In this direction of elastic forces, the elastic sealing materials of the contacting surfaces of the box and the lid fill small irregularities and seal the place of their contact.

On the box and lid there is a lock in the form of a girdle protrusion pos. 11 of FIG. 1 on the box and the trench of FIG. 12 poses 1 in the lid, when the detachable chamber is closed, the protrusion of the box is located in the cavity of the lid, additionally holding it from opening. Sealed input of switched wires is carried out through openings in an elastic sealing material - pos. 10. The holes have a smaller diameter than the wires themselves, when threading through smaller diameter holes, the wires compress the elastic sealing material and seal the place of their entry.

The sealing of another known electrical connector, a screw terminal block, is illustrated in FIG. 4. In FIG. 4 poses 4 - switched wires, pos. 5 - screw terminal block, pos. 6, 7 - details of the device for sealing. The position of the screw terminal block 5 in the closed detachable chamber formed by the parts of the sealing device 6, 7 is illustrated in FIG. 5. Sealing of a screw terminal block with switched cables - pos. 9 is illustrated in FIG. 6. The sealing of the leads of the wires or cables can be strengthened with the help of the retaining sleeve 8 (Fig. 6), instead of the sleeve 8 can be applied tightening collar. The cuff is needed to hold the elastic material near the wires or cable for better sealing. The clamp is used to tightly seal the elastic material around the wires or cable.

The shape of the inner cavity of the lockable detachable chamber cannot always completely repeat the shape of the electrical connector, therefore, after sealing, some air may remain in it. When the ambient temperature or atmospheric pressure changes, the residual air can expand and contract, while a conductive liquid can be sucked into the internal cavity from the environment, which can form a conductive film between the parts of the closable detachable chamber or at the places where the wires enter. To displace the remaining air into the internal cavity, a water-repellent gel or oil may be placed before the electrical connector is placed there.

Devices for sealing other types of connectors are made similar to the described devices.

The design of the devices does not contain expensive and unreliable assemblies; in the manufacture of device parts, special manufacturing accuracy is not required, since the elastic material of some parts is stretched when sealing the connector, others are compressed, compensating for manufacturing inaccuracies. The shape of the internal cavity does not have to closely follow the shape of the connector, since the elastic material to be sealed is squeezed around the connector when the device is sealed. Parts of the device can be made by molding from rubber, silicone or other elastic sealing materials.

As an example of FIG. 7 and FIG. 8 illustrate an embodiment of a device for sealing a known electrical connector made by cold casting of Pentaelast-710 two-component silicone into a prefabricated mold. Despite the primitiveness of the manufacturing technology, the device provided a degree of protection for the IP-67 electrical connector (Short-term immersion to a depth of 1 m) without additional sealing of the internal cavity with water-repellent gel or oil.

The method of sealing a detachable chamber is used in all considered devices for sealing connectors. For example, FIG. 3 illustrates a detachable camera consisting of a box of poses. 1 and covers pos. 2, while the elastic sealing material of the boxing pos. 1 is compressed by the stretched elastic sealing material of the cover pos. 2. The elastic forces press the elastic sealing material of the box to the elastic sealing material of the lid, and vice versa, thus, the junction of the materials of the box and the lid is sealed. At the same time, the sealing material cannot get into the cavity of the electrical connector pos. 3, since the proposed sealing method does not use liquid, bulk or solidifying sealing materials.

Claims (5)

1. A device for sealing a connector, consisting of a detachable chamber, forming an inner cavity that is sealed when closed, characterized in that the shape of the inner cavity of the closed detachable chamber repeats the shape of the sealable connector, the detachable chamber is made of two or more parts of elastic sealing material, when closing the detachable parts of the chamber partly tightly fit into one another, while the elastic sealing material of some parts is stretched, and the other is compressed, sealing esto their compounds, and sealed switched input wires and (or) the cables through the holes in the flexible sealable material and sealed at seal elastic sealing material around the wires, and (or) cables. 2. The device for sealing the connector according to claim 1, characterized in that on the parts of the closable detachable chamber to hold them relative to each other after closing, there is a lock in the form of a protrusion on one part and a depression on the other part, when closing the detachable chamber, the protrusion enters the depression and keeps the detachable camera from opening. 3. The device for sealing the connector according to paragraphs. 1, 2, characterized in that the elastic sealing material at the entry point of the switched wires and (or) cables is pulled together by a clamp. 4. A device for sealing a connector according to claim 1, characterized in that a water-repellent gel is embedded in the internal cavity of the closable detachable chamber. 5. A method of sealing a detachable chamber, comprising compressing an elastic sealing material, characterized in that the compression of the elastic sealing material is carried out by a stretched elastic sealing material, and the elastic forces press the compressed and stretched elastic sealing materials to each other.

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