CN111336260A - A balanced shut-off, regulating, filtering and drain valve - Google Patents

Abstract

The invention discloses a balanced type cut-off, adjustment, filtration and blow-off valve which comprises a handle, a valve rod nut, a valve cover, a valve rod, a filtration lining, a piston, a valve body, a valve seat and a lower valve cover. The invention has the advantages that: the balance type stop, regulation, filtration and blow-down valve is innovatively designed, is a multifunctional valve integrating four functions, can reduce the types and the number of valves installed on a process pipeline, and saves the process cost of the pipeline. The defects that a medium directly erodes a sealing pair when the flow of the valve is regulated, a sealing surface is easy to damage, the sealing performance of the valve is poor, and the service life is short are overcome. The valve can filter the impurity in the pipeline, reduces impurity and to valve downstream end equipment influence. And the sewage discharge process flow can be carried out by opening the lower valve cover valve.

Description

A balanced shut-off, regulating, filtering and drain valve

technical field

The invention provides a balanced shut-off, regulating, filtering and draining valve suitable for use in petroleum, chemical industry and other industries.

technical background

At present, domestic globe valves, regulating valves, filter valves, and sewage valves only have a single function or two functions, resulting in a large number and variety of valves installed and used in process pipelines and high pipeline process costs. At present, the valve is generally composed of valve stem, valve stem nut, valve cover, valve body, valve seat, valve disc and other main parts. Valve seat, valve disc sealing pair. When the valve is opened and the flow is adjusted, the pipeline medium flows out between the valve seat and the valve disc, and the medium directly scours the valve sealing pair, which is easily damaged by the medium scouring, resulting in the failure of the valve sealing performance. Especially in the case of high differential pressure regulating flow, the valve life is shorter. There is no filter device in the valve, the impurities in the pipeline cause damage to the equipment at the downstream end of the valve, and the pipeline equipment cannot operate normally.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the technical shortcomings of the existing valve structure, and innovatively design a balanced shut-off, regulating, filtering, and sewage valve, which is a multi-functional valve with four functions integrated, which can reduce the types and quantities of valves installed in the process pipeline. Save pipeline process cost. It solves the shortcomings that the medium directly washes the sealing pair, the sealing surface is easily damaged, the valve sealing performance is poor, and the service life is short when the valve is adjusting the flow rate. The valve can filter impurities in the pipeline and reduce the impact of impurities on the equipment at the downstream end of the valve. The blowdown process can be carried out by opening the lower valve cover valve.

The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention consists of a handle, a valve stem nut, a valve cover, a valve stem, a filter bushing, a piston, a valve body, a valve seat, and a lower valve cover, and a valve seat is installed in the middle of the valve body. The upper end of the valve seat is equipped with a filter bushing, the upper end of the filter bushing is equipped with a valve cover, the upper end of the valve seat inside the filter bushing is equipped with a piston, the upper end of the piston is provided with a balance chamber, and the lower end face of the piston and the upper end face of the valve seat are provided with a seal The lower end of the valve body is equipped with a lower valve cover.

There are 2 or more rows of filter holes on the lower cylindrical surface of the filter bushing. The distance from the center line of the filter hole to the lower end of the filter bushing should be greater than 1.5 times the diameter of the filter hole. The lower end face of the piston and the upper end face of the valve seat are provided with The sealing pair should be below the lower end face of the filter bushing.

The valve cover, the filter bushing, the piston and the valve stem form a balance chamber, and a balance hole is arranged inside the piston, and the balance hole communicates with the balance chamber.

The valve body is provided with a water inlet and a water outlet, and a valve cavity is arranged in the middle of the valve body.

The advantages of the invention are: innovatively designed a balanced shut-off, regulating, filtering and draining valve, which is a multifunctional valve with four functions integrated, which can reduce the types and quantity of valves installed in the process pipeline and save the pipeline process cost. It solves the shortcomings that the medium directly washes the sealing pair, the sealing surface is easily damaged, the valve sealing performance is poor, and the service life is short when the valve is adjusting the flow rate. The valve can filter impurities in the pipeline and reduce the impact of impurities on the equipment at the downstream end of the valve. The blowdown process can be carried out by opening the lower valve cover valve.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The accompanying drawing is a front cross-sectional view of an embodiment of the present invention.

1 handle, 2 valve stem nut, 3 valve cover, 4 valve stem, 5 filter bushing, 6 piston, 7 valve body, 8 valve seat, 9 lower valve cover, A water inlet, B water outlet, C balance Cavity, D sealing pair, E balance hole, F filter hole, G valve cavity.

Detailed ways

In the accompanying drawings, a balanced shut-off, regulating, filtering and draining valve consists of a handle (1), a valve stem nut (2), a valve cover (3), a valve stem (4), a filter bushing (5), The piston (6), the valve body (7), the valve seat (8), and the lower valve cover (9) are composed. The valve body (7) is equipped with a valve seat (8) in the middle, and the upper end of the valve seat (8) is equipped with a filter lining The sleeve (5), the upper end of the filter sleeve (5) is equipped with a valve cover (3), the upper end of the inner valve seat (8) of the filter sleeve (5) is equipped with a piston (6), and the upper end of the piston (6) is equipped with a balance The cavity (C), the lower end surface of the piston (6) and the upper end surface of the valve seat (8) are provided with a sealing pair (D), and the lower end of the valve body (7) is provided with a lower valve cover (9). There are two or more rows of filter holes (F) on the lower cylindrical surface of the filter bushing (5), and the distance from the centerline of the filter holes (F) to the lower end of the filter bushing (5) should be greater than 1.5 times the filter holes (F). ), the sealing pair (D) provided on the lower end face of the piston (6) and the upper end face of the valve seat (8) should be below the lower end face of the filter bushing (5). The valve cover (3), the filter bushing (5), the piston (6), and the valve stem (4) form a balance chamber (C). The piston (6) is provided with a balance hole (E), and the balance hole (E) is connected to the balance chamber (C). The cavity (C) is communicated. The valve body (7) is provided with a water inlet (A) and a water outlet (B), and a valve cavity (G) is arranged in the middle part of the valve body (7).

A balanced pressure balancing mechanism for cut-off, regulating, filtering and blowdown valves is composed of a valve cover (3), a filter bushing (5), a piston (6), and a valve stem (4) to form a balance chamber (C), and the piston (6) ) is provided with a balance hole (E) inside, and the balance hole (E) communicates with the balance cavity (C).

The medium enters the valve body from the valve water inlet (A), and reaches the balance chamber (C) through the balance hole (E) on the piston (6). At this time, the pressure of the medium on the upper and lower ends of the piston (6) is basically equal, and the valve is opened and closed. It only needs to overcome the thrust and frictional resistance of the medium to the valve stem, and the opening and closing of the valve is very flexible.

A sealing mechanism of a balanced shut-off, regulating, filtering and sewage valve is composed of a piston (6) and a valve seat (8). When the valve is completely closed, the sealing surface of the lower end of the piston (6) and the upper end of the valve seat (8) are sealed The sealing surface is compressed to form a valve sealing pair (D), which cuts off the flow of the medium and the valve is in a closed state.

A flow regulating mechanism for a balanced shut-off, regulating, filtering and draining valve is composed of a filter bushing (5), a piston (6) and a valve seat (8). When the valve is opened, turn the valve handle (1), the valve stem nut (2) drives the valve stem (4) and the piston (6) to move upward, and a gap is created between the piston (6) and the sealing pair (D) of the valve seat (8). , the valve starts to open. When the lower end surface of the piston (6) exceeds the filter hole (F) at the bottom of the filter bush (5), the valve can adjust the flow rate. At this time, the valve seat (8) and the piston (6) are sealed (D). ) of the clearance flow cross-sectional area is greater than the flow cross-sectional area of the medium passing through the filter hole (F). The adjustment flow is controlled by how much the medium passes through the filter hole (F), the medium only flushes the filter hole (F), the medium does not flush the valve seat (8) and the sealing pair (D) on the piston (6), the sealing pair (D) be protected. Adjust the opening degree of the piston (6), and how much the medium passes through the filter hole (F) to adjust the flow, so as to achieve the function of the valve to adjust the flow.

A filter mechanism of a balanced cut-off, adjustment, filter and sewage valve is composed of a filter bush (5) and a piston (6). When the valve is opened, the piston (6) moves upward, and the medium is output to the valve through the filter hole (F), the impurities in the medium are blocked in the valve by the filter hole (F), and the equipment at the downstream end of the valve is not affected by the impurities. Removing the lower valve cover (9) can clean up the impurities in the valve and play a filtering role.

A venting mechanism for a balanced shut-off, regulating, filtering and sewage valve is composed of a valve body (7) and a lower valve cover (9).

The working principle of the present invention is as follows: when the handle (1) is rotated counterclockwise, the valve stem nut (2) is rotated counterclockwise, which drives the valve stem (4) and the piston (6) to move upward, and the connection between the piston (6) and the valve seat (8) is The sealing pair (D) creates a gap, and the valve starts to open. When the lower end surface of the piston (6) exceeds the filter hole (F) at the bottom of the filter bush (5), the valve can adjust the flow rate. At this time, the valve seat (8) and the piston (6) The clearance flow cross-sectional area of the sealing pair (D) is larger than the flow cross-sectional area of the medium passing through the filter hole (F). ), the valve adjustment flow is controlled by how much the medium passes through the filter hole (F), the medium only flushes the filter hole (F), the medium does not flush the valve seat (8) and the sealing pair (D) on the piston (6). ), the sealing pair (D) is protected. Adjust the opening degree of the piston (6), and how much the medium passes through the filter hole (F) to adjust the flow, so as to achieve the function of the valve to adjust the flow. The medium reaches the valve cavity (G) from the water inlet (A), the gap between the sealing pair (D) of the piston (6) and the valve seat (8), and the filter hole (F) exposed on the filter bushing (5). (F) Output.

The impurities in the medium are blocked in the valve by the filter hole (F). Removing the lower valve cover (9) can clean up the impurities in the valve, and the valve can be operated in the sewage discharge process.

Rotate the handle (1) clockwise, the valve stem nut (2) is driven, the valve stem (4) and the piston (6) move down, and the sealing surface of the lower end of the piston (6) and the sealing surface of the upper end of the valve seat (8) are pressed tightly. The valve sealing pair (D) is formed, the flow of the medium is cut off, and the valve is in a closed state.

Claims (4)

1. A balanced shut-off, regulating, filtering and draining valve, comprising a handle (1), a valve stem nut (2), a valve cover (3), a valve stem (4), a filter bushing (5), a piston (6) ), a valve body (7), a valve seat (8), and a lower valve cover (9). The liner (5), the upper end of the filter liner (5) is provided with a valve cover (3), the upper end of the inner valve seat (8) of the filter liner (5) is provided with a piston (6), and the upper end of the piston (6) is provided with a piston (6). The balance chamber (C), the lower end surface of the piston (6) and the upper end surface of the valve seat (8) are provided with a sealing pair (D), and the lower end of the valve body (7) is provided with a lower valve cover (9). 2. A kind of balanced shut-off, regulating, filtering and drain valve according to claim 1, characterized in that: the lower cylindrical surface of the filter bushing (5) is provided with 2 rows or more than 2 rows of filter holes (F) , the distance from the center line of the filter hole (F) to the lower end of the filter bush (5) should be greater than 1.5 times the diameter of the filter hole (F). D) should be below the lower end face of the filter bush (5). 3. A balanced shut-off, regulating, filtering and draining valve according to claim 1, characterized in that: a valve cover (3), a filter bushing (5), a piston (6), and a valve stem (4) are composed of The balance cavity (C) is provided with a balance hole (E) inside the piston (6), and the balance hole (E) communicates with the balance cavity (C). 4. A balanced shut-off, regulating, filtering and draining valve according to claim 1, characterized in that: the valve body (7) is provided with a water inlet (A), a water outlet (B), and the valve body (7) ) is provided with a valve cavity (G) in the middle.

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