Filtering pressure reducing valve

Abstract

The utility model discloses a filtering pressure reducing valve which comprises a shell, and a blow-off pipe is integrally formed below the shell. The sewage discharging assembly comprises a movable sleeve movably inserted into the sewage discharging pipe, a plurality of sets of communicating holes formed in the side wall of the movable sleeve and a threaded rod inserted into the movable sleeve in a threaded mode, when the sewage discharging device works normally, the threaded rod shields and seals the communicating holes, the communicating holes are located in the sewage discharging pipe, secondary sealing is achieved, and the sewage discharging effect is good. A medium in the shell is effectively prevented from leaking through the communicating hole; during pollution discharge, the threaded rod is rotated to drive the movable sleeve to move upwards, the communicating hole is opened, and impurities and sewage can enter the movable sleeve through the communicating hole and then are discharged through an internal flow channel of the threaded rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially filter pressure reducing valve. BACKGROUND

[0002] In the pneumatic system, the filter pressure reducing valve can filter the gas, stabilize the pressure, and keep the gas pressure constant, thereby reducing the damage to the valve or actuator caused by sudden changes in the gas source pressure.

[0003] The filter pressure reducing valve is provided with a blowdown port at the bottom. The blowdown port is usually sealed by a single screw. When blowdown is needed, the screw only needs to be loosened. However, this single-screw sealing method is not tight enough. Therefore, a filter pressure reducing valve is proposed to solve this problem. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides the following technical scheme:

[0005] The filter pressure reducing valve comprises:

[0006] A shell is integrally formed below the shell and is provided with a blowdown pipe.

[0007] A blowdown assembly comprises a moving sleeve movably inserted into the blowdown pipe, a plurality of communication holes formed in the side wall of the moving sleeve, and a threaded rod screwedly inserted into the moving sleeve. The threaded rod is internally provided with a flow channel. Both ends of the threaded rod are provided with openings in flow communication. The bottom of the threaded rod penetrates the blowdown pipe and extends to the outside of the blowdown pipe. A spring is wound between the moving sleeve and the bottom inner wall of the blowdown pipe on the surface of the threaded rod. An external force drives the threaded rod to rotate. The threaded rod drives the moving sleeve to move upwards. The communication holes are controlled to move from the blowdown pipe into the shell. The communication holes are opened. The threaded rod is driven to rotate in the opposite direction. The communication holes are controlled to move from the shell into the blowdown pipe. The communication holes are closed.

[0008] As an improvement of the above technical scheme, a sealing disc is integrally formed at the top of the moving sleeve.

[0009] As an improvement of the above technical scheme, a communication cavity is formed in the blowdown pipe near the top. A sealing cavity adapted to the sealing disc is formed in the blowdown pipe at the top of the communication cavity.

[0010] As an improvement of the above technical scheme, a plurality of limiting blocks are fixedly arranged on the circumferential surface of the moving sleeve. Limiting grooves adapted to the limiting blocks are formed in the inner wall of the blowdown pipe.

[0011] As an improvement of the above technical scheme, a sewage pipe is rotatably sleeved on the bottom of the threaded rod. An air inlet pipe is communicatively arranged on one side of the sewage pipe.

[0012] The utility model discloses the beneficial effect of:

[0013] Normal work, threaded rod shielding closed communication hole, and communication hole is located in blowdown pipe, realizes secondary seal, effectively avoids the medium in the shell through communication hole leakage, when discharging sewage, rotates threaded rod and drives the removal of the upper sleeve, and communication hole opens, and impurity, sewage can enter the removal of the sleeve through communication hole, and then is discharged through the internal flow passage of threaded rod. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure front view of the utility model;

[0015] Figure 2 It is the utility model Figure 1 The enlarged structure schematic diagram of A place in the middle;

[0016] Figure 3 It is the bottom view of the removal of the sleeve of the utility model.

[0017] Signification of drawing: 10, shell;11, blowdown pipe;12, communication chamber;13, sealing cavity;20, removal of the sleeve;21, sealing disc;22, communication hole;23, limit block;30, spring;40, threaded rod;50, sewage pipe;51, inlet pipe. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantage of the utility model more clear and clear, the following is combined with the drawings and example, and the utility model is further detailedly explained.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0019] Filtering pressure reducing valve, comprising:

[0020] Shell 10, the blowdown pipe 11 of being provided with below the shell 10 integral molding;

[0021] The blowdown assembly comprises a moving sleeve 20 movably inserted into the blowdown pipe 11, a plurality of communication holes 22 formed in the sidewall of the moving sleeve 20, and a threaded rod 40 threaded into the moving sleeve 20, the threaded rod 40 is internally provided with a flow channel, both ends of the threaded rod 40 are provided with openings in flow communication, the bottom of the threaded rod 40 penetrates the blowdown pipe 11 and extends to the outside of the blowdown pipe 11, a spring 30 is wound on the surface of the threaded rod 40 between the moving sleeve 20 and the bottom of the inner wall of the blowdown pipe 11, an external force drives the threaded rod 40 to rotate, the threaded rod 40 drives the moving sleeve 20 to move upwards, controls the communication holes 22 to move from the blowdown pipe 11 into the shell 10, the communication holes 22 are opened, drives the threaded rod 40 to rotate reversely, controls the communication holes 22 to move from the shell 10 into the blowdown pipe 11, and the communication holes 22 are closed.

[0022] Specifically, when the filter pressure reducing valve is normally working, the threaded rod 40 is in the initial position, the communication holes 22 are blocked and closed, the communication holes 22 are in the blowdown pipe 11, the secondary sealing is realized, the moving sleeve 20 is in the blowdown pipe 11, at this time, the communication holes 22 are also in the blowdown pipe 11 and are in the closed state, in this way, the medium in the shell cannot flow out through the communication holes 22, and the medium leakage is avoided, when the blowdown operation is needed, an external force drives the threaded rod 40 to rotate, drives the moving sleeve 20 to move upwards, as the moving sleeve 20 moves upwards, the communication holes 22 originally in the blowdown pipe 11 gradually move from the blowdown pipe 11 into the shell 10, at the same time, the outer wall of the threaded rod 40 is separated from the communication holes 22, so that the communication holes 22 are opened, at this time, the impurities, sewage and the like deposited in the shell 10 can enter the inside of the moving sleeve 20 through the communication holes 22, and then are discharged through the flow channel in the threaded rod 40, so that the blowdown function is realized, after the blowdown is completed, the threaded rod 40 is reversely driven to rotate, drives the moving sleeve 20 to move downwards, so that the communication holes 22 gradually move from the shell 10 into the blowdown pipe 11, when the communication holes 22 completely return to the blowdown pipe 11, the threaded rod 40 also blocks and seals the communication holes 22, the communication holes 22 are closed, the medium in the shell 10 is prevented from continuously flowing into the blowdown pipe 11, the filter pressure reducing valve returns to the normal working state, the spring 30 provides the extrusion, in this way, it can be ensured that the moving sleeve 20 and the blowdown pipe 11 are in the tight state, the sealing performance between the moving sleeve 20 and the blowdown pipe 11 is improved, and the spring 30 is arranged below the moving sleeve 20, so that the sewage or impurities can effectively avoid corroding the spring 30, and the service life of the spring 30 is prolonged.

[0023] In one embodiment, the top of the moving sleeve 20 is integrally formed with a sealing disc 21, which can further enhance the sealing effect of the medium in the shell 10, because the moving sleeve 20 is in the drain pipe 11 and the communication hole 22 is closed, at this time, the sealing disc 21 tightly adheres to the connecting part of the shell 10 and the drain pipe 11, preventing the medium in the shell 10 from leaking out of the drain pipe 11, which greatly improves the sealing of the entire filter pressure reducing valve compared to the case without the sealing disc 21.

[0024] In one embodiment, the drain pipe 11 is provided with a communication cavity 12 near the top, and the drain pipe 11 is provided with a sealing cavity 13 at the top of the communication cavity 12, which is matched with the sealing disc 21. The sealing disc 21 is matched with the sealing cavity 13, which greatly enhances the sealing effect and effectively prevents the medium in the shell 10 from leaking from the drain pipe 11. When the communication hole 22 enters the communication cavity, the communication hole 22 is opened, and the sewage impurities at the bottom of the shell 10 can flow into the communication cavity 12, making it flow smoothly into the moving sleeve 20, which improves the drainage efficiency.

[0025] In one embodiment, the circumferential surface of the moving sleeve 20 is fixedly provided with a plurality of limiting blocks 23, and the inner wall of the drain pipe 11 is provided with a limiting groove matched with the limiting block 23, which provides guidance for the up and down movement of the moving sleeve 20, ensures the linear motion of the moving sleeve 20, and avoids the problems of sealing failure or the communication hole 22 cannot be normally opened and closed due to deviation or inclination during movement.

[0026] In one embodiment, the bottom of the threaded rod 40 is rotatably sleeved with a sewage pipe 50, one side of the sewage pipe 50 is provided with an air inlet pipe 51, sewage can be discharged through the sewage pipe 50, and when the communication hole 22 is blocked, gas can be injected into the threaded rod 40 through the air inlet pipe 51 to use the gas to dredge the communication hole 22.

[0027]

[0028] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto.​

Claims

1. A filter pressure reducing valve, characterized in that, include: A housing (10) is provided with a drain pipe (11) integrally formed at the bottom of the housing (10); The sewage discharge assembly includes a movable sleeve (20) movably inserted into the sewage pipe (11), multiple sets of connecting holes (22) formed on the side wall of the movable sleeve (20), and a threaded rod (40) threadedly inserted into the movable sleeve (20). The threaded rod (40) has a flow channel inside, and both ends of the threaded rod (40) have openings communicating with the flow. The bottom of the threaded rod (40) penetrates the sewage pipe (11) and extends to the outside of the sewage pipe (11). The surface of the threaded rod (40)... A spring (30) is wound between the movable sleeve (20) and the bottom of the inner wall of the drain pipe (11). An external force drives the threaded rod (40) to rotate, and the threaded rod (40) drives the movable sleeve (20) to move upward, controlling the connecting hole (22) to move from the drain pipe (11) into the housing (10). The connecting hole (22) opens, drives the threaded rod (40) to rotate in the opposite direction, controls the connecting hole (22) to move from the housing (10) into the drain pipe (11), and the connecting hole (22) closes.

2. The filter pressure reducing valve according to claim 1, characterized in that: The top of the movable sleeve (20) is integrally formed with a sealing disc (21).

3. The filter pressure reducing valve according to claim 2, characterized in that: A connecting cavity (12) is provided inside the drain pipe (11) and near the top. A sealing cavity (13) adapted to the sealing disc (21) is provided inside the drain pipe (11) and at the top of the connecting cavity (12).

4. The filter pressure reducing valve according to claim 1, characterized in that: The circumferential surface of the movable sleeve (20) is fixedly provided with multiple sets of limiting blocks (23), and the inner wall of the sewage pipe (11) is provided with a limiting groove that matches the limiting blocks (23).

5. The filter pressure reducing valve according to claim 1, characterized in that: The bottom of the threaded rod (40) is rotatably sleeved with a sewage pipe (50), and an air inlet pipe (51) is connected to one side of the sewage pipe (50).

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