Efficient pressure release valve

Abstract

An efficient pressure release valve comprises a valve seat and a core seat, the valve seat is provided with a liquid flow channel and a liquid inlet, the core seat is provided with a liquid outlet, the core seat is provided with a center pipe, the center pipe is sleeved with a first sliding plug in a sliding mode, the bottom of the first sliding plug blocks a first valve port formed in the valve seat, and the first sliding plug is provided with a side through hole; a second valve port is formed in the center pipe, the center pipe is provided with a second sliding plug and a first pressure relief hole, the second sliding plug is provided with a liquid flow hole, the first pressure relief hole can be communicated with the side through hole by sliding the first sliding plug, a control piece is arranged at the tail end of the center pipe, and the control piece and the second sliding plug are in magnetic attraction fit. Pressure relief is conducted through the liquid flow hole of the second sliding plug, the more the second sliding plug moves upwards, the smaller the magnetic attraction acting force is, the acting force needed by the second sliding plug to be jacked upwards is smaller than the acting force needed by the second sliding plug to be punched open, continuous and efficient pressure relief can be guaranteed, and after pressure relief is completed, the second sliding plug moves back rapidly and directly seals the second valve port.

Description

Technical Field

[0001] The utility model relates to the field of control valves, and particularly relates to an efficient pressure relief valve. Background Art

[0002] At present, the existing pressure relief valves basically set elastic parts to automatically control the opening and closing state of their valve ports. The pressure relief valve with this structure features that only a small acting force is required to open the valve port, while a large impact force is needed to open the valve port wide. As the internal pressure becomes smaller and smaller, the opening of the valve port gradually narrows, and the pressure relief becomes slower and slower. Generally, the time required from opening for pressure relief to restoring closure is relatively long, with low efficiency. At the same time, the use of elastic parts results in a short service life of the pressure relief valve. Content of the Utility Model

[0003] In order to solve the above problems, the utility model provides an efficient pressure relief valve:

[0004] An efficient pressure relief valve includes a valve seat and a core seat. A liquid flow channel is provided in the valve seat, and a liquid inlet is provided at the bottom. The core seat is inserted into the upper end of the valve seat and forms a threaded fit. An outlet is provided at the upper end of the core seat. A central tube penetrating into the valve seat is fixedly provided on the core seat. The upper end of the central tube communicates with the outlet. A first sliding plug is slidably sleeved outside the central tube, and the bottom of the first sliding plug blocks a first valve port provided in the valve seat. Side through holes are provided on the first sliding plug; a second valve port is provided in the central tube. A second sliding plug and a first pressure relief hole are respectively provided above and below the second valve port in the central tube. The second sliding plug is slidably fitted in a movable cavity provided in the central tube. A vertical liquid flow hole is provided on the second sliding plug. The first pressure relief hole can be communicated with the side through holes by sliding the first sliding plug. A control member is provided at the end of the central tube, and the control member forms a magnetic attraction fit with the second sliding plug.

[0005] Preferably, a bottom opening for the central tube to pass through is provided at the bottom of the first sliding plug. The control member is a blocking ball. The blocking ball is located in a limiting cavity provided at the end of the central tube. The blocking ball blocks a third valve port provided at the upper end of the limiting cavity under the action of magnetic attraction. The limiting cavity is communicated with the movable cavity through the third valve port and the second valve port in sequence. A end cover threadedly fitted with the central tube is provided below the limiting cavity. The end cover is provided with annularly arranged second pressure relief holes. After the second sliding plug is pushed upward, the magnetic attraction force received by the blocking ball is relatively small, and since the liquid flowing into the first pressure relief hole flushes the blocking ball downward, the blocking ball disengages and opens the third valve port, and the liquid flow will enter the bottom opening of the first sliding plug and be pressure relieved through the second pressure relief holes, the third valve port, and the second valve port in sequence, further improving the pressure relief efficiency.

[0006] Preferably, an inner ring groove communicating with the side through-hole is provided inside the first sliding plug. After the liquid flow enters the inner ring groove through the side through-hole, it can accelerate the upward movement of the first sliding plug to connect the side through-hole with the first pressure relief hole. At the same time, after the connection, the inner ring groove can ensure that the continuous upward movement of the first sliding plug will not affect this connection state.

[0007] Preferably, a connector is threadedly engaged with the liquid outlet. The inner end of the connector penetrates into the central tube and constitutes the maximum upward movement limit of the second sliding plug to control the required time for the second sliding plug to move back.

[0008] Preferably, the liquid flow hole is a stepped hole that is narrower at the top and wider at the bottom, so that during the pressure relief process, the second sliding plug can be continuously pushed upward by the liquid flow.

[0009] The utility model has the following beneficial effects: Under normal constant pressure conditions, the first sliding plug blocks the first valve port. When the internal pressure is unstable, the first sliding plug floats. When the internal pressure increases, the first sliding plug is pushed upward, causing its side through-hole to communicate with the first pressure relief hole. The liquid flow entering the first pressure relief hole flushes upward the second sliding plug to open the second valve port, and the liquid flow passes through the liquid flow hole of the second sliding plug for pressure relief. The more the second sliding plug moves upward, the smaller the magnetic attraction force it receives. At this time, the force required to push the second sliding plug upward is smaller than the force required to push it open, which can ensure continuous and efficient pressure relief. After the pressure relief is completed, the second sliding plug moves back quickly and directly closes the second valve port. Description of the Drawings

[0010] Figure 1 Schematic diagram of the inside of the valve seat of the embodiment.

[0011] Figure 2 Schematic diagram of the internal structure principle of the embodiment.

[0012] Figure 3 Schematic diagram of the pressure relief working principle of the embodiment.

[0013] 1. Valve seat; 2. Core seat; 3. Liquid flow channel; 4. Liquid inlet; 5. Liquid outlet; 6. Central tube; 7. First sliding plug; 8. First valve port; 9. Side through-hole; 10. Second valve port; 11. Second sliding plug; 12. First pressure relief hole; 13. Activity cavity; 14. Liquid flow hole; 15. Bottom port; 16. Plug ball; 17. Limit cavity; 18. Third valve port; 19. End cover; 20. Second pressure relief hole; 21. Inner ring groove; 22. Connector. Detailed Embodiment

[0014] The following further describes the present utility model in conjunction with the Figures 1 to 3 embodiments.

[0015] An efficient pressure relief valve, comprising a valve seat 1 and a core seat 2. A liquid flow channel 3 is provided in the valve seat 1, and a liquid inlet 4 is provided at the bottom. The core seat 2 is inserted into the upper end of the valve seat 1 and forms a threaded fit. An outlet 5 is provided at the upper end of the core seat 2. A central tube 6 penetrating into the valve seat 1 is fixedly provided on the core seat 2. The upper end of the central tube 6 communicates with the outlet 5. A first sliding plug 7 is slidably sleeved outside the central tube 6, and the bottom of the first sliding plug 7 seals a first valve port 8 provided in the valve seat 1. The first sliding plug 7 is provided with a side through hole 9; a second valve port 10 is provided in the central tube 6. A second sliding plug 11 and a first pressure relief hole 12 are respectively provided above and below the second valve port 10 in the central tube 6. The second sliding plug 11 is slidably fitted in a movable cavity 13 provided in the central tube 6. The second sliding plug 11 is provided with a vertical liquid flow hole 14. The first pressure relief hole 12 can be connected to the side through hole 9 by sliding the first sliding plug 7. A control member is provided at the end of the central tube 6, and the control member forms a magnetic attraction fit with the second sliding plug 11.

[0016] An inner ring groove 21 communicating with the side through hole 9 is provided inside the first sliding plug 7. After the liquid flow enters the inner ring groove 21 through the side through hole 9, it can accelerate the upward movement of the first sliding plug 7 to connect the side through hole 9 with the first pressure relief hole 12. At the same time, after the connection, the inner ring groove 21 can ensure that the continuous upward movement of the first sliding plug 7 will not affect this connection state.

[0017] A bottom port 15 for the central tube 6 to pass through is provided at the bottom of the first sliding plug 7. The control member is a plug ball 16. The plug ball 16 is located in a limiting cavity 17 provided at the end of the central tube 6. The plug ball 16 seals a third valve port 18 provided at the upper end of the limiting cavity 17 under the action of magnetic attraction. The limiting cavity 17 is sequentially connected to the movable cavity 13 through the third valve port 18 and the second valve port 10. A end cover 19 threadedly fitted to the central tube 6 is provided below the limiting cavity 17. The end cover 19 is provided with second pressure relief holes 20 arranged in a ring. After the second sliding plug 11 is pushed upward, the magnetic attraction force received by the plug ball 16 is small, and since the liquid flow entering the first pressure relief hole 12 flushes the plug ball 16 downward, the plug ball 16 is separated to open the third valve port 18, and the liquid flow will enter the bottom port 15 of the first sliding plug 7 and is relieved through the second pressure relief holes 20, the third valve port 18, and the second valve port 10 in sequence, further improving the pressure relief efficiency.

[0018] A connector 22 is threadedly fitted to the outlet 5. The connector 22 can be externally connected to a recovery pipeline. The inner end of the connector 22 penetrates into the central tube 6 and forms the maximum upward movement limit of the second sliding plug 11 to control the time required for the second sliding plug 11 to return. At the same time, this limiting setting can be used for specific positioning, so that the magnetic attraction force received by the plug ball 16 can be reduced to the size that can be flushed open by the liquid flow downward, so as to quickly open the third valve port 18 for direct current pressure relief.

[0019] Working principle: Under normal constant pressure conditions, the first sliding plug 7 blocks the first valve port 8. When the internal pressure is unstable, the first sliding plug 7 floats. When the internal pressure increases, the first sliding plug 7 is pushed upward, causing its side through-hole 9 to communicate with the first pressure relief hole 12. The liquid flow entering the first pressure relief hole 12 flushes upward the second sliding plug 11 to open the second valve port 10, and the liquid flow passes through the liquid flow hole 14 of the second sliding plug 11 for pressure relief. The more the second sliding plug 11 moves upward, the smaller the magnetic attraction force it receives. At this time, the force required to push the second sliding plug 11 upward is smaller than the force required to flush it open, ensuring continuous and efficient pressure relief. Under high-pressure conditions, the second sliding plug 11 is flushed upward to a higher position, and the magnetic attraction force received by the blocking ball 16 cannot support its state of blocking the third valve port 18, so it will fall back. At this time, the third valve port 18 is opened, and the liquid flow will directly pass through the bottom port 15 of the first sliding plug 7 and sequentially through the second pressure relief hole 20, the third valve port 18, and the second valve port 10 for direct current pressure relief, further improving the pressure relief efficiency. After the pressure relief is completed, the second sliding plug 11 falls back and magnetically attracts the blocking ball 16. The second sliding plug 11 blocks the second valve port 10, and the blocking ball 16 blocks the third valve port 18.

[0020] Obviously, the above-mentioned embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A high-efficiency pressure relief valve, characterized in that: The invention comprises a valve seat (1) and a core seat (2), wherein a liquid flow channel (3) is provided in the valve seat (1) and a liquid inlet (4) is provided at the bottom, wherein the core seat (2) is inserted from the upper end of the valve seat (1) and forms a threaded fit, wherein a liquid outlet (5) is provided at the upper end of the core seat (2), wherein a central tube (6) penetrating into the valve seat (1) is fixedly provided on the core seat (2), wherein the upper end of the central tube (6) is connected to the liquid outlet (5), wherein a first sliding plug (7) is provided on the outer sliding sleeve of the central tube (6), and the bottom of the first sliding plug (7) blocks a first valve port (8) provided in the valve seat (1), and the first sliding plug (7) is provided with a side through hole (9); a second valve port (10) is provided in the central tube (6); a second sliding plug (11) and a first pressure relief hole (12) are provided above and below the second valve port (10) respectively on the central tube (6); the second sliding plug (11) is slidably matched with a movable cavity (13) provided in the central tube (6); the second sliding plug (11) is provided with a vertical liquid flow hole (14); the first pressure relief hole (12) can be connected to the side through hole (9) by sliding the first sliding plug (7); a control member is provided at the end of the central tube (6); the control member and the second sliding plug (11) form a magnetic attraction match.

2. A high-efficiency pressure relief valve according to claim 1, characterized in that: The bottom of the first sliding plug (7) is provided with a bottom opening (15) for the central tube (6) to pass through, and the control member is a blocking ball (16). The blocking ball (16) is located in a limiting cavity (17) provided at the end of the central tube (6). The blocking ball (16) blocks a third valve opening (18) provided at the upper end of the limiting cavity (17) under the action of magnetic attraction. The limiting cavity (17) is connected to the movable cavity (13) through the third valve opening (18) and the second valve opening (10) in sequence. An end cover (19) threadedly matched with the central tube (6) is provided below the limiting cavity (17), and the end cover (19) is provided with second pressure relief holes (20) arranged in a ring shape.

3. A high-efficiency pressure relief valve according to claim 1, characterized in that: An inner ring groove (21) communicating with the side through hole (9) is provided on the inner side of the first sliding plug (7).

4. A high-efficiency pressure relief valve according to claim 1, characterized in that: The liquid outlet (5) is threadedly matched with a connector (22), the inner end of the connector (22) penetrates into the central tube (6) and forms a maximum upward movement limit for the second sliding plug (11).

5. A high-efficiency pressure relief valve according to claim 1, characterized in that: The liquid flow hole (14) is a stepped hole which is narrow at the top and wide at the bottom.

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