Hydraulic valve control equipment and methods for testing hydraulic valve control equipment

Abstract

This invention discloses a hydraulic valve control device and a method for testing the hydraulic valve control device. The device includes a valve body auxiliary control mechanism. The valve body is cross-shaped, and a valve core is movably inserted into the inner wall of the valve body. The auxiliary control mechanism includes a connecting rod. One end of the valve body has a connecting groove, and one end of the connecting rod is rotatably connected to the inner wall of the connecting groove. The other end of the connecting rod passes through the inner wall of the valve body and is fixedly connected to a pull plate. A positioning mechanism is provided on the outer wall of the connecting rod. This invention utilizes the connecting rod and pull plate, along with a positioning ring, a first internal thread groove, and a first external thread groove. The movement of the pull plate causes the connecting rod to move the valve core, enabling the valve body to operate. Then, the rotation of the positioning ring causes it to move and abut against a rotating ring, thus counteracting the compressive force of the compression spring on the valve core, allowing the valve core to be positioned and operate. This allows for manual control of the valve body in case of damage to the hydraulic control component.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, and in particular to hydraulic valve control equipment and methods for testing hydraulic valve control equipment. Background Technology

[0002] A hydraulic valve is a valve controlled by hydraulic pressure. Installed in a liquid flow pipeline, it controls the flow of liquid. However, most current hydraulic valves operate solely through hydraulic control. Injecting liquid into the valve's plug increases the internal pressure, causing the valve core inside the valve body to move, connecting the inlet and outlet, thus enabling the valve to connect the liquid flow pipeline. However, if the hydraulic control system malfunctions, the valve will cease to function properly. Therefore, we propose a hydraulic valve control device that can be controlled in multiple ways. Summary of the Invention

[0003] The purpose of this invention is to provide a hydraulic valve control device and a method for testing the hydraulic valve control device, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic valve control device, comprising:

[0005] The valve body is arranged in a cross shape. A valve core is movably inserted into the inner wall of the valve body. An elastic mechanism is provided on one side of the valve core, and a hydraulic connection mechanism is provided on the other side of the valve core. A second limiting mechanism is provided on the outer wall of the valve core.

[0006] An auxiliary control mechanism is provided, which includes a connecting rod. One end of the valve body has a connecting groove. One end of the connecting rod is rotatably connected to the inner wall of the connecting groove. The other end of the connecting rod passes through the inner wall of the valve body and is fixedly connected to a pull plate. A positioning mechanism is provided on the outer wall of the connecting rod and located outside the valve body.

[0007] Preferably, the positioning mechanism includes a positioning ring, which is sleeved on the outer wall of the connecting rod. The inner wall of the positioning ring has a first internal thread groove, and the outer wall of the connecting rod has a first external thread groove. The outer walls of the first internal thread groove and the first external thread groove are engaged and connected. The outer wall of the pull plate has a pull groove.

[0008] Preferably, the valve body has an inlet at the top and an outlet at the bottom, and the valve core has an annular flow groove on its outer wall.

[0009] Preferably, a first sealing ring and a third sealing ring are respectively fitted at the two ends of the outer wall of the valve core, and a second sealing ring is fitted at the middle of the outer wall of the valve core. The second sealing ring and the third sealing ring are disposed on both sides of the annular flow groove.

[0010] Preferably, the elastic mechanism includes a spring seat and a compression spring. The spring seat is slidably connected to the inner wall of the valve body, and the compression spring is disposed between the spring seat and the inner wall of the connecting groove. An adjustment mechanism is provided in the middle of the spring seat.

[0011] Preferably, the adjusting mechanism includes a rotating sleeve, which is rotatably connected to the inner wall of the valve body. The rotating sleeve is inserted into the middle of the spring seat. The inner wall of the spring seat is provided with a second internal thread groove, and the outer wall of the rotating sleeve is provided with a second external thread groove. The outer wall of the second external thread groove is engaged with the outer wall of the second internal thread groove. The outer wall of the spring seat is provided with a first limiting mechanism.

[0012] A movable hole is provided on one side of the rotating sleeve, and the outer wall of the connecting rod is movably inserted into the inner wall of the movable hole.

[0013] Preferably, the first limiting mechanism includes two first limiting grooves and a first limiting block. The two first limiting grooves are both formed on the inner wall of the valve body, and the two first limiting blocks are both fixedly connected to the outer wall of the spring seat. The outer walls of the two first limiting blocks are slidably connected to the inner walls of the two first limiting grooves respectively.

[0014] A rotating ring is fixedly sleeved on the outer wall of the rotating sleeve. The rotating ring is located outside the valve body, and the outer wall of the rotating ring is provided with uniformly distributed anti-slip textures.

[0015] Preferably, the second limiting mechanism includes two second limiting grooves and a second limiting block. The two second limiting grooves are both opened on the inner wall of the valve body, and the two second limiting blocks are both fixedly connected to the outer wall of the valve core. The outer walls of the two second limiting blocks are slidably connected to the inner walls of the two second limiting grooves, respectively.

[0016] Preferably, the hydraulic connection mechanism includes a screw plug, a sealing gasket is provided between the screw plug and the valve body, a groove is provided at both ends of the outer wall of the screw plug, a connection port is provided on one side of the valve body, one end of the screw plug is movably inserted into the inner wall of the connection port, a third external thread groove is provided on the inner wall of the groove, a third internal thread groove is provided on the inner wall of the connection port, and the outer wall of the third external thread groove is threadedly connected to the inner wall of the third internal thread groove.

[0017] Both ends of the valve body are fixedly fitted with connecting flanges, and the top of each connecting flange is provided with multiple connecting holes.

[0018] This invention also provides a method for testing hydraulic valve control equipment, comprising the following steps:

[0019] Step 1: Connect the external liquid flow device to the two connecting flanges using connecting bolts, and connect the external hydraulic device to the screw plug. Then, inject liquid into the screw plug through the external hydraulic device to increase the internal pressure of the screw plug, causing the valve core to be squeezed and moved. The movement of the valve core compresses the compression spring until the annular flow groove is connected to the inlet and outlet. If the liquid in the external liquid flow device passes through the inlet, annular flow groove and outlet in sequence, the valve body flow starts to work, and the hydraulic control part can be detected to be working normally.

[0020] Step 2: When testing the manual control part, the screw plug no longer pressurizes the valve core. At this time, the operator pulls the pull plate, which moves the connecting rod. The movement of the connecting rod moves the valve core, which in turn compresses the compression spring until the annular flow groove connects with the inlet and outlet. If the liquid in the external liquid flow equipment flows out through the valve body, it means that the manual control part is working normally. At this time, rotate the positioning ring. Under the meshing of the first internal thread groove and the first external thread groove, the positioning ring moves on the outer wall of the connecting rod until the positioning ring abuts against the rotating ring. At this time, the elasticity of the compression spring is counteracted, and the valve core is positioned.

[0021] Step 3: Reset the valve core to stop the valve body from flowing. Then rotate the rotating ring, which drives the rotating sleeve to rotate. Under the meshing of the second internal thread groove and the second external thread groove, the first limiting groove limits the first limiting block. At this time, the spring seat moves inside the valve body until it moves to the side of the valve body. Then pressurize the screw plug. At this time, the valve core moves under pressure, connecting the inlet and outlet. Record the hydraulic pressure in the screw plug. Then rotate the rotating ring in the opposite direction. At this time, the spring seat moves in the opposite direction. If the screw plug needs to increase the hydraulic pressure to move the valve core and connect the inlet and outlet, it can be determined that the adjustment part of the valve body can work normally.

[0022] The technical effects and advantages of this invention are as follows:

[0023] (1) The present invention utilizes the setting of connecting rod and pull plate, and through the setting of positioning ring, first internal thread groove and first external thread groove, the connecting rod drives the valve core to move by the movement of pull plate, so that the valve body can work. Then, by rotating the positioning ring, under the meshing of the first internal thread groove and the first external thread groove, the positioning ring moves to abut against the rotating ring. At this time, the squeezing force of the compression spring on the valve core can be offset, so that the valve core is positioned and works. Thus, the valve body can be controlled manually when the hydraulic control part is damaged.

[0024] (2) The present invention utilizes the setting of spring seat, rotating sleeve, second external thread groove and second internal thread groove, and under the limitation of the first limiting mechanism, the spring seat can move to adjust the position of the compression spring. At this time, the hydraulic strength required for the movement of the valve core can be adjusted, which improves the convenience of valve body use.

[0025] (3) The present invention utilizes the setting of the second limiting block and the second limiting groove to limit the second limiting block through the second limiting groove, thereby limiting the range of movement of the valve core, so that the valve core can stably control the connection between the liquid inlet and the liquid outlet, and improve the stability of the valve core in use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a front cross-sectional view of the present invention.

[0028] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A.

[0029] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point B.

[0030] Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at point C.

[0031] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at point D.

[0032] In the diagram: 11. Valve body; 12. Valve core; 13. Annular flow groove; 14. First sealing ring; 15. Second sealing ring; 16. Third sealing ring; 17. Liquid inlet; 18. Liquid outlet; 19. Connection port; 21. Connection groove; 22. Connection rod; 23. Pull plate; 24. Positioning ring; 25. First internal thread groove; 26. First external thread groove; 27. Pull groove; 30. Rotating sleeve; 31. Spring seat; 32. Compression spring; 33. Movable hole; 34. Second external thread groove; 35. Second internal thread groove; 36. First limiting groove; 37. First limiting block; 38. Rotary ring; 39. Anti-slip texture; 41. Second limiting groove; 42. Second limiting block; 51. Plug; 52. Sealing gasket; 53. Slot; 54. Third external thread groove; 55. Third internal thread groove; 61. Connecting flange; 62. Connecting hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention provides, for example Figure 1-6 The hydraulic valve control device shown includes a valve body 11 and an auxiliary control mechanism. The valve body 11 is arranged in a cross shape. A valve core 12 is movably inserted into the inner wall of the valve body 11. An elastic mechanism is provided on one side of the valve core 12, and a hydraulic connection mechanism is provided on the other side of the valve core 12. A second limiting mechanism is provided on the outer wall of the valve core 12. The state of the valve body 11 is adjusted by the movement of the valve core 12 inside the valve body 11.

[0035] The auxiliary control mechanism includes a connecting rod 22. One end of the valve body 11 is provided with a connecting groove 21. One end of the connecting rod 22 is rotatably connected to the inner wall of the connecting groove 21. The other end of the connecting rod 22 passes through the inner wall of the valve body 11 and is fixedly connected to a pull plate 23. A positioning mechanism is provided on the outer wall of the connecting rod 22 and located outside the valve body 11. The movement of the pull plate 23 drives the connecting rod 22 to move, so that the valve core 12 can move and work. The valve body 11 can be operated manually, making the operation of the valve body 11 more convenient.

[0036] The positioning mechanism includes a positioning ring 24, which is sleeved on the outer wall of the connecting rod 22. The inner wall of the positioning ring 24 has a first internal thread groove 25, and the outer wall of the connecting rod 22 has a first external thread groove 26. The outer wall of the first internal thread groove 25 and the outer wall of the first external thread groove 26 are engaged. The outer wall of the pull plate 23 has a pull groove 27. Under the engagement of the first external thread groove 26 and the first internal thread groove 25, the positioning ring 24 can move on the outer wall of the connecting rod 22. After the connecting rod 22 pulls the valve core 12 to move, the positioning ring 24 abuts against the rotating ring 38, thereby positioning the connecting rod 22 and counteracting the compression of the compression spring 32 on the valve core 12, thus positioning the valve core 12.

[0037] The valve body 11 has an inlet 17 at the top and an outlet 18 at the bottom. The valve core 12 has an annular flow groove 13 on its outer wall. When the valve core 12 moves, the annular flow groove 13 connects the inlet 17 and the outlet 18, allowing the valve body 11 to work normally. The two ends of the outer wall of the valve core 12 are respectively fitted with a first sealing ring 14 and a third sealing ring 16. The middle part of the outer wall of the valve core 12 is fitted with a second sealing ring 15. The second sealing ring 15 and the third sealing ring 16 are located on both sides of the annular flow groove 13.

[0038] The elastic mechanism includes a spring seat 31 and a compression spring 32. The spring seat 31 is slidably connected to the inner wall of the valve body 11, and the compression spring 32 is disposed between the spring seat 31 and the inner wall of the connecting groove 21. An adjustment mechanism is provided in the middle of the spring seat 31. The spring seat 31 positions the compression spring 32 so that the compression spring 32 can stably compress the valve core 12.

[0039] The adjusting mechanism includes a rotating sleeve 30, which is rotatably connected to the inner wall of the valve body 11. The rotating sleeve 30 is inserted into the middle of the spring seat 31. The inner wall of the spring seat 31 is provided with a second internal thread groove 35, and the outer wall of the rotating sleeve 30 is provided with a second external thread groove 34. The outer wall of the second external thread groove 34 is engaged with the outer wall of the second internal thread groove 35. The outer wall of the spring seat 31 is provided with a first limiting mechanism. By engaging the second external thread groove 34 with the second internal thread groove 35, the rotating sleeve 30 can rotate to drive the spring seat 31 to move, thereby changing the position of the compression spring 32 and adjusting the compression force of the compression spring 32 on the valve core 12. This allows the hydraulic strength of the valve core 12 to be adjusted.

[0040] A movable hole 33 is provided on one side of the rotating sleeve 30. The outer wall of the connecting rod 22 is movably inserted into the inner wall of the movable hole 33. The connecting rod 22 and the rotating sleeve 30 do not affect each other, so that the operation of the adjustment mechanism and the auxiliary control mechanism are not affected.

[0041] The first limiting mechanism includes two first limiting grooves 36 and a first limiting block 37. The two first limiting grooves 36 are both opened on the inner wall of the valve body 11, and the two first limiting blocks 37 are both fixedly connected to the outer wall of the spring seat 31. The outer walls of the two first limiting blocks 37 are slidably connected to the inner walls of the two first limiting grooves 36 respectively. The first limiting grooves 36 limit the first limiting blocks 37, thereby offsetting the lateral force brought to the spring seat 31 by the rotation of the rotating sleeve 30, so that the spring seat 31 will not rotate when it moves, thus improving the stability of the movement of the spring seat 31.

[0042] A rotating ring 38 is fixedly sleeved on the outer wall of the rotating sleeve 30. The rotating ring 38 is located outside the valve body 11. The outer wall of the rotating ring 38 is provided with evenly distributed anti-slip textures 39, which facilitates the rotation of the rotating sleeve 30.

[0043] The second limiting mechanism includes two second limiting grooves 41 and a second limiting block 42. The two second limiting grooves 41 are both opened on the inner wall of the valve body 11, and the two second limiting blocks 42 are both fixedly connected to the outer wall of the valve core 12. The outer walls of the two second limiting blocks 42 are slidably connected to the inner walls of the two second limiting grooves 41 respectively. The second limiting grooves 41 limit the second limiting blocks 42, thereby limiting the movement range of the valve core 12.

[0044] The hydraulic connection mechanism includes a screw plug 51, a sealing gasket 52 between the screw plug 51 and the valve body 11, and slots 53 at both ends of the outer wall of the screw plug 51. A connection port 19 is provided on one side of the valve body 11. One end of the screw plug 51 is movably inserted into the inner wall of the connection port 19. A third external thread groove 54 is provided on the inner wall of the slot 53, and a third internal thread groove 55 is provided on the inner wall of the connection port 19. The outer wall of the third external thread groove 54 is threadedly connected to the inner wall of the third internal thread groove 55. By connecting the screw plug 51 to an external hydraulic device, the internal pressure of the screw plug 51 can be increased, causing the valve core 12 to move.

[0045] Both ends of the valve body 11 are fixedly fitted with connecting flanges 61, and the top of each connecting flange 61 is provided with multiple connecting holes 62, so that external liquid flow equipment can be connected to the valve body 11 through the connecting flanges 61.

[0046] The present invention also provides a method for testing a hydraulic valve control device, comprising the following steps:

[0047] The external liquid flow device is connected to the two connecting flanges 61 by connecting bolts, and the external hydraulic device is connected to the screw plug 51. Then, liquid is injected into the screw plug 51 by the external hydraulic device, which increases the internal pressure of the screw plug 51. This causes the valve core 12 to be squeezed and moved. The movement of the valve core 12 squeezes the compression spring 32 until the annular flow groove 13 is connected to the liquid inlet 17 and the liquid outlet 18. If the liquid of the external liquid flow device passes through the liquid inlet 17, the annular flow groove 13 and the liquid outlet 18 in sequence, the valve body 11 starts to work, and the hydraulic control part can be detected to be working normally.

[0048] When testing the manual control part, the screw plug 51 no longer pressurizes the valve core 12. At this time, the operator pulls the pull plate 23. The movement of the pull plate 23 moves the connecting rod 22, which in turn moves the valve core 12. The valve core 12 then compresses the compression spring 32 until the annular flow groove 13 connects with the inlet 17 and outlet 18. If the liquid in the external liquid flow equipment flows out through the valve body 11, it indicates that the manual control part can work normally. At this time, the positioning ring 24 is rotated. Under the meshing of the first internal thread groove 25 and the first external thread groove 26, the positioning ring 24 moves on the outer wall of the connecting rod 22 until the positioning ring 24 abuts against the rotating ring 38. At this time, the elasticity of the compression spring 32 is counteracted, and the valve core 12 is positioned.

[0049] Reset the valve core 12 so that the valve body 11 stops flowing. Then rotate the rotating ring 38. The rotation of the rotating ring 38 drives the rotating sleeve 30 to rotate. Under the engagement of the second internal thread groove 35 and the second external thread groove 34, the first limiting groove 36 limits the first limiting block 37. At this time, the spring seat 31 moves inside the valve body 11 until the spring seat 31 moves to the side of the valve body 11. Then pressurize the screw plug 51. At this time, the valve core 12 moves under pressure, so that the inlet port 17 and the outlet port 18 are connected. Record the hydraulic pressure in the screw plug 51. Then rotate the rotating ring 38 in the opposite direction. At this time, the spring seat 31 moves in the opposite direction. If the screw plug 51 needs to increase the hydraulic pressure to make the valve core 12 move and make the inlet port 17 and the outlet port 18 connected, it can be detected and determined that the adjustment part of the valve body 11 can work normally.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic valve control device, characterized in that, include: The valve body (11) is arranged in a cross shape. A valve core (12) is movably inserted and connected to the inner wall of the valve body (11). An elastic mechanism is provided on one side of the valve core (12), and a hydraulic connection mechanism is provided on the other side of the valve core (12). A second limiting mechanism is provided on the outer wall of the valve core (12). An auxiliary control mechanism is provided, which includes a connecting rod (22). One end of the valve body (11) is provided with a connecting groove (21). One end of the connecting rod (22) is rotatably connected to the inner wall of the connecting groove (21). The other end of the connecting rod (22) passes through the inner wall of the valve body (11) and is fixedly connected to a pull plate (23). A positioning mechanism is provided on the outer wall of the connecting rod (22) and outside the valve body (11). The valve body (11) has an inlet (17) at the top and an outlet (18) at the bottom. The valve core (12) has an annular flow groove (13) on its outer wall. The two ends of the outer wall of the valve core (12) are respectively fitted with a first sealing ring (14) and a third sealing ring (16), and the middle part of the outer wall of the valve core (12) is fitted with a second sealing ring (15). The second sealing ring (15) and the third sealing ring (16) are located on both sides of the annular flow groove (13). The elastic mechanism includes a spring seat (31) and a compression spring (32). The spring seat (31) is slidably connected to the inner wall of the valve body (11). The compression spring (32) is disposed between the inner wall of the spring seat (31) and the inner wall of the connecting groove (21). An adjustment mechanism is provided in the middle of the spring seat (31). The adjusting mechanism includes a rotating sleeve (30), which is rotatably connected to the inner wall of the valve body (11). The rotating sleeve (30) is inserted into the middle of the spring seat (31). The inner wall of the spring seat (31) is provided with a second internal thread groove (35), and the outer wall of the rotating sleeve (30) is provided with a second external thread groove (34). The outer wall of the second external thread groove (34) is engaged with the outer wall of the second internal thread groove (35). The outer wall of the spring seat (31) is provided with a first limiting mechanism. The rotating sleeve (30) has a movable hole (33) on one side, and the outer wall of the connecting rod (22) is movably inserted and connected to the inner wall of the movable hole (33).

2. The hydraulic valve control device according to claim 1, characterized in that, The positioning mechanism includes a positioning ring (24), which is sleeved on the outer wall of the connecting rod (22). The inner wall of the positioning ring (24) is provided with a first internal thread groove (25), and the outer wall of the connecting rod (22) is provided with a first external thread groove (26). The outer wall of the first internal thread groove (25) and the outer wall of the first external thread groove (26) are engaged and connected. The outer wall of the pull plate (23) is provided with a pull groove (27).

3. The hydraulic valve control device according to claim 2, characterized in that, The first limiting mechanism includes two first limiting grooves (36) and a first limiting block (37). The two first limiting grooves (36) are both opened on the inner wall of the valve body (11), and the two first limiting blocks (37) are both fixedly connected to the outer wall of the spring seat (31). The outer walls of the two first limiting blocks (37) are slidably connected to the inner walls of the two first limiting grooves (36). The outer wall of the rotating sleeve (30) is fixedly fitted with a rotating ring (38), which is located outside the valve body (11). The outer wall of the rotating ring (38) is provided with uniformly distributed anti-slip textures (39).

4. The hydraulic valve control device according to claim 3, characterized in that, The second limiting mechanism includes two second limiting grooves (41) and a second limiting block (42). The two second limiting grooves (41) are both opened on the inner wall of the valve body (11), and the two second limiting blocks (42) are both fixedly connected to the outer wall of the valve core (12). The outer walls of the two second limiting blocks (42) are slidably connected to the inner walls of the two second limiting grooves (41).

5. The hydraulic valve control device according to claim 4, characterized in that, The hydraulic connection mechanism includes a screw plug (51), a sealing gasket (52) is provided between the screw plug (51) and the valve body (11), and a slot (53) is provided at both ends of the outer wall of the screw plug (51). A connection port (19) is provided on one side of the valve body (11). One end of the screw plug (51) is movably inserted into the inner wall of the connection port (19). A third external thread groove (54) is provided on the inner wall of the slot (53), and a third internal thread groove (55) is provided on the inner wall of the connection port (19). The outer wall of the third external thread groove (54) is threadedly connected to the inner wall of the third internal thread groove (55). Both ends of the valve body (11) are fixedly fitted with connecting flanges (61), and the top of each connecting flange (61) is provided with multiple connecting holes (62).

6. A method for testing a hydraulic valve control device, utilizing the hydraulic valve control device of claim 5, characterized in that, Includes the following steps: Step 1: Connect the external liquid flow device to the two connecting flanges (61) respectively by connecting bolts, and connect the external hydraulic device to the screw plug (51). Then, inject liquid into the screw plug (51) through the external hydraulic device, so that the internal pressure of the screw plug (51) increases, causing the valve core (12) to be squeezed and moved. The movement of the valve core (12) squeezes the compression spring (32) until the annular flow groove (13) is connected to the inlet (17) and the outlet (18). If the liquid of the external liquid flow device passes through the inlet (17), the annular flow groove (13) and the outlet (18) in sequence, the valve body (11) starts to work, and the hydraulic control part can be detected to be working normally. Step 2: When testing the manual control part, the screw plug (51) no longer pressurizes the valve core (12). At this time, the operator pulls the pull plate (23). The pull plate (23) moves and drives the connecting rod (22) to move. The connecting rod (22) can move the valve core (12). At this time, the valve core (12) moves and squeezes the compression spring (32) until the annular flow groove (13) is connected to the liquid inlet (17) and the liquid outlet (18). If the liquid in the external liquid flow equipment flows out through the valve body (11), it means that the manual control part can work normally. At this time, rotate the positioning ring (24). Under the meshing of the first internal thread groove (25) and the first external thread groove (26), the positioning ring (24) moves on the outer wall of the connecting rod (22) until the positioning ring (24) abuts against the rotating ring (38). At this time, the elasticity of the compression spring (32) can be offset, so that the valve core (12) is positioned. Step 3: Reset the valve core (12) so that the valve body (11) no longer flows. Then rotate the rotating ring (38). The rotation of the rotating ring (38) drives the rotating sleeve (30) to rotate. Under the meshing of the second internal thread groove (35) and the second external thread groove (34), the first limiting groove (36) limits the first limiting block (37). At this time, the spring seat (31) moves inside the valve body (11) until the spring seat (31) moves to the side of the valve body (11) and then moves towards the side of the valve body (11). Pressurization is applied inside the screw plug (51). At this time, the valve core (12) is moved by the pressure, so that the inlet (17) and outlet (18) are connected. The hydraulic pressure inside the screw plug (51) is recorded. Then, the rotating ring (38) is rotated in the opposite direction. At this time, the spring seat (31) moves in the opposite direction. If the hydraulic pressure inside the screw plug (51) needs to be increased to make the valve core (12) move so that the inlet (17) and outlet (18) are connected, it can be detected and determined that the adjustment part of the valve body (11) can work normally.

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