CN220581695U - Pneumatic control stop valve - Google Patents

Abstract

The utility model discloses a pneumatic control stop valve, which comprises a valve seat, a valve rod and a valve core, wherein the valve seat is provided with an inflow channel and an outflow channel, the inflow channel is vertically arranged, the diameter of the inflow channel is larger than that of the outflow channel, the outflow channel is in a bent structure, the outflow channel is lower than that of the inflow channel, the valve core is in a disc structure and is blocked at the joint of the inflow channel and the outflow channel, the valve rod is in a stepped rod structure, one end of the valve rod is slidably arranged with the valve core, the other end of the valve rod extends to the outer side of the valve seat and is provided with a pneumatic actuating member.

Description

Pneumatic control stop valve

Technical Field

The utility model discloses a pneumatic control stop valve, and belongs to the technical field of valves.

Background

The closing principle of the stop valve is that the valve lever pressure is relied on to make the sealing surface of the valve clack closely adhere to the sealing surface of the valve seat to prevent medium circulation, so when the valve is closed, pressure must be applied to the valve clack to make the forced sealing surface not leak, the stop valve is the most widely used valve, and the friction force between the sealing surfaces in the opening and closing process is small, so the stop valve is durable, the opening height is not large, the manufacture is easy, the maintenance is convenient, and the stop valve is not only suitable for medium and low pressure, but also suitable for high pressure. When the valve is closed, the reaction speed of the valve core and the valve seat in sealing fit is mostly slower, and the sealing performance between the valve core and the valve seat needs to be improved.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a pneumatic control stop valve.

The utility model realizes the purpose through the following technical scheme that the pneumatic control stop valve comprises a valve seat, a valve rod and a valve core, wherein the valve seat is provided with an inflow channel and an outflow channel, the inflow channel is vertically arranged, the diameter of the inflow channel is larger than that of the outflow channel, the outflow channel is of a bent structure, the outflow channel is lower than that of the inflow channel, the valve core is of a disc structure and is blocked at the joint of the inflow channel and the outflow channel, the valve rod is of a stepped rod structure, one end of the valve rod is slidably arranged with the valve core, the other end of the valve rod extends to the outer side of the valve seat and is provided with a pneumatic executing piece, and the valve seat is positioned in the inflow channel and is provided with an elastic piece for applying force to the valve core to block the outflow channel and the inflow channel.

Preferably, the valve seat comprises an upper valve body and a lower valve body connected by bolts.

Preferably, the pneumatic actuator comprises a cylinder body and a piston, wherein the cylinder body is fixed on the lower valve body, the cylinder body is provided with a cavity, the piston is arranged in the cavity in a sliding manner, one end of the piston is fixedly connected with the valve rod, and an air pipe communicated with the cavity is arranged on the cylinder body.

Preferably, the elastic piece comprises a first spring and a limiting piece, the limiting piece is installed in the upper valve body, the first spring is sleeved on the outer side of the valve rod, and two ends of the first spring are respectively abutted against the limiting piece and the valve core.

Preferably, the limiting piece comprises a mounting seat, a guide rod, a sliding plate and a nut, wherein the mounting seat is fixedly connected with the lower valve body through a bolt, three guide rods are symmetrically arranged, one ends of the guide rods are fixedly connected with the mounting seat, the other ends of the guide rods are slidably arranged on the sliding plate, and the nut is in threaded connection with the valve rod.

Preferably, the matching surfaces of the valve core, the lower valve body and the valve rod are inclined planes, a sealing element is further arranged on the lower valve body, the sealing element comprises a second spring and a sealing ring, the second spring is located in the cavity, and two ends of the second spring are respectively abutted to the piston and the sealing ring.

Compared with the prior art, the utility model has the beneficial effects that:

through setting up case, valve rod and pneumatic executive component, let in gas in the cavity by the trachea to rely on atmospheric pressure to promote the piston removal, make the valve rod drive the case break away from the conflict with lower valve body, thereby make the valve keep open state, and when the trachea does not aerify, atmospheric pressure in the cavity reduces, can rely on the effort of first spring to the case, make case and lower valve body cooperation in order to close the valve rapidly, and the fluid from last to the flow mode down, can exert pressure to the case when the valve is closed, make case and sealing performance of lower disk seat and valve rod better.

Drawings

FIG. 1 is a schematic diagram of a pneumatically controlled shut-off valve according to the present utility model;

FIG. 2 is a cross-sectional view of a pneumatically controlled shut-off valve of the present utility model;

FIG. 3 is a schematic view of the valve stem, valve core and elastomeric element of the present utility model;

reference numerals: 1. an inflow channel; 2. a valve seat; 3. a pneumatic actuator; 4. an outflow channel; 5. an upper valve body; 6. an elastic member; 7. a valve core; 8. a valve stem; 9. a seal; 10. a piston; 11. an air pipe; 12. a cylinder; 13. a lower valve body; 14. a first spring; 15. a guide rod; 16. a nut; 17. a sliding plate; 18. a second spring; 19. a mounting base; 20. and (3) sealing rings.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, a pneumatic control stop valve comprises a valve seat 2, a valve rod 8 and a valve core 7, wherein the valve seat 2 is provided with an inflow channel 1 and an outflow channel 4, the inflow channel 1 is vertically arranged, the diameter of the inflow channel 1 is larger than that of the outflow channel 4, the outflow channel 4 is of a bent structure, the outflow channel 4 is lower than that of the inflow channel 1, the valve core 7 is of a disc structure and is blocked at the joint of the inflow channel 1 and the outflow channel 4, the valve rod 8 is of a stepped rod structure, one end of the valve rod 8 is slidably arranged with the valve core 7, the other end of the valve rod extends to the outer side of the valve seat 2 and is provided with a pneumatic executing piece 3, the valve seat 2 is positioned in the inflow channel 1 and is provided with an elastic piece 6 for exerting force on the valve core 7 to block the outflow channel 4 and the inflow channel 1, the valve seat 2 comprises an upper valve body 5 and a lower valve body 13 which are connected through bolts, and the valve seat 2 is designed into a split structure, and the valve rod 8, the valve core 7 and the elastic piece 6 can be conveniently installed.

The pneumatic actuator 3 comprises a cylinder body 12 and a piston 10, the cylinder body 12 is fixed on a lower valve body 13, the cylinder body 12 is provided with a cavity, the piston 10 is slidably arranged in the cavity, one end of the piston 10 is fixedly connected with the valve rod 8, an air pipe 11 communicated with the cavity is arranged on the cylinder body 12, air is filled into the cavity from the air pipe 11, the piston 10 and the valve rod 8 can be pushed to move, the valve core 7 can synchronously move, so that the valve core 7 is separated from the interference with the lower valve body 13, the inflow channel 1 and the outflow channel 4 are communicated, and when the air in the cavity is discharged by means of the air pipe 11, the valve core 7 can be quickly reset under the action of the elastic piece 6 and is in interference with the lower valve body 13, so that the valve can be closed.

The elastic piece 6 comprises a first spring 14 and a limiting piece, the limiting piece is arranged in the upper valve body 5, the first spring 14 is sleeved on the outer side of the valve rod 8, two ends of the limiting piece are respectively abutted against the limiting piece and the valve core 7, the limiting piece is kept relatively static with the upper valve body 5, when the valve core 7 moves upwards to compress the first spring 14, the valve is in an open state, the valve is closed by means of acting force of the first spring 14 on the valve core 7, the limiting piece comprises a mounting seat 19, a guide rod 15, a sliding plate 17 and a nut 16, the mounting seat 19 is fixedly connected with the lower valve body 13 through bolts, three guide rods 15 are symmetrically arranged, one ends of the guide rods are fixedly connected with the mounting seat 19, the other ends of the guide rods are slidably arranged with the sliding plate 17, the nut 16 is in threaded connection with the valve rod 8, and the mounting position of the nut 16 on the valve rod 8 is controlled, so that the position of the sliding plate 17 is controlled to adjust the compression length of the first spring 14, and the elasticity of the first spring 14 can be adjusted, so that the valve core 7 closes the valve faster.

The matching surfaces of the valve core 7, the lower valve body 13 and the valve rod 8 are inclined surfaces, the lower valve body 13 is further provided with a sealing element 9, the sealing element 9 comprises a second spring 18 and a sealing ring 20, the second spring 18 is located in the cavity, two ends of the second spring are respectively abutted against the piston 10 and the sealing ring 20, the valve core 7 is sealed with the lower valve body 13 and the valve rod 8 through the inclined surfaces, and because fluid flows downwards from top to bottom, when the valve core 7 is in a closed state, fluid located on one side of the inflow channel 1 can have pressure on the valve core 7, so that the sealing performance is better when the valve core 7 is matched with the lower valve body 13 and the valve rod 8, leakage does not occur, and the second spring 18 exerts upward elastic force on the sealing ring 20, so that the sealing ring 20 always abuts against the joint of the lower valve seat 2 and the valve rod 8, the sealing performance of the lower valve body 13 can be guaranteed, and when the valve is in an open state, fluid flows downwards from top to carry away residues at the matching position of the lower valve body 13 and the valve core 7, and the complete sealing of the valve is guaranteed.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. The utility model provides a pneumatic control stop valve, includes disk seat (2), valve rod (8) and case (7), its characterized in that, disk seat (2) have an inflow passageway (1) and an outflow passageway (4), inflow passageway (1) are vertical setting, and the diameter of inflow passageway (1) is greater than the diameter of outflow passageway (4), outflow passageway (4) are the curved structure, and outflow passageway (4) are less than inflow passageway (1), case (7) are disk structure to the shutoff is in the junction of inflow passageway (1) and outflow passageway (4), valve rod (8) are the ladder pole structure, and its one end and case (7) slide the setting, and the other end extends to the outside of disk seat (2) and is provided with pneumatic actuator (3), disk seat (2) are provided with in inflow passageway (1) and are used for exerting effort in order to block elastic component (6) of outflow passageway (4) and inflow passageway (1) to case (7).

2. A pneumatically controlled shut-off valve according to claim 1, characterized in that the valve seat (2) comprises an upper valve body (5) and a lower valve body (13) connected by means of bolts.

3. A pneumatic control shut-off valve according to claim 2, characterised in that the pneumatic actuator (3) comprises a cylinder (12) and a piston (10), the cylinder (12) is fixed on the lower valve body (13), the cylinder (12) has a cavity, the piston (10) is slidably arranged in the cavity, one end of the piston (10) is fixedly connected with the valve rod (8), and the cylinder (12) is provided with an air pipe (11) communicating with the cavity.

4. A pneumatic control stop valve according to claim 2, characterized in that the elastic member (6) comprises a first spring (14) and a limiting member, the limiting member is arranged in the upper valve body (5), the first spring (14) is sleeved on the outer side of the valve rod (8), and two ends of the first spring are respectively abutted against the limiting member and the valve core (7).

5. The pneumatic control stop valve according to claim 4, wherein the limiting piece comprises a mounting seat (19), a guide rod (15), a sliding plate (17) and a nut (16), the mounting seat (19) is fixedly connected with the lower valve body (13) through bolts, the guide rod (15) is symmetrically provided with three guide rods, one end of each guide rod is fixedly connected with the mounting seat (19), the other end of each guide rod is slidably arranged with the sliding plate (17), and the nut (16) is in threaded connection with the valve rod (8).

6. A pneumatic control stop valve according to claim 3, characterized in that the matching surfaces of the valve core (7) with the lower valve body (13) and the valve rod (8) are inclined surfaces, the lower valve body (13) is further provided with a sealing element (9), the sealing element (9) comprises a second spring (18) and a sealing ring (20), the second spring (18) is located in the cavity, and two ends of the second spring respectively collide with the piston (10) and the sealing ring (20).