A strength detection device for valve housing

Abstract

The present invention discloses a strength detection device for valve housing, which relates to the technical field of valve housing strength detection, including a base, a hydraulic cylinder is vertically installed through the top of the mounting frame, a connecting seat is installed at the bottom of the lower pressure seat, a protective lower shell is provided on the top of the movable seat, a driving assembly is provided inside the protective lower shell, a supporting tube seat is vertically movable in the circular mouth, and the bottom end of the supporting tube seat is provided with a reverse top mechanism for secondary pressurization inside the valve housing; a longitudinal movement mechanism is provided in the rectangular mouth; the present invention facilitates the water pressure test operation when the valve housing is closed through the cooperation of the lifting seat, the reverse top mechanism and the lower pressure seat, and can effectively improve the accuracy of the strength test of the valve housing, can perform secondary pressure on the water body inside the valve housing, and facilitates that when the liquid transmits pressure in the valve housing, the pressure at each point inside the valve housing is equalized, thereby ensuring the safety and reliability of the overall structural strength of the valve housing.

Description

Technical Field

[0001] The present invention relates to the technical field of valve housing strength detection, and in particular to a strength detection device for a valve housing. Background Art

[0002] During valve production, the strength of the valve housing needs to be tested, mainly to ensure that the valve can withstand the pressure and stress under normal working conditions and to prevent the valve housing from cracking or deforming during operation, which would affect the normal operation and safety of the valve. However, due to the complexity of the valve housing water pressure test operation: the traditional method of performing valve housing water pressure test is cumbersome and inefficient, and it is difficult to ensure the accuracy of the test. In addition, the existing testing methods are often unable to apply secondary pressure to the inside of the valve housing, resulting in uneven pressure at various points inside the valve housing during the test, affecting the accuracy of the test results. There is a lack of effective means to ensure the overall structural strength, safety and reliability of the valve housing during the water pressure test, which poses a potential safety hazard. At the same time, when the valve housing is subjected to water pressure testing, water splashing is likely to occur, which not only affects the test environment, but also may pose a safety threat to the test personnel, and there is a lack of effective protective measures. Therefore, the above problems need to be solved. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a strength detection device for a valve housing.

[0004] The top of described lifting bridge is installed in the time frame of ramming down, and the bottom of described lifting bridge is installed in the time frame of ramming down, and the bottom of described lifting bridge is installed in the time frame of ramming down.

[0005] Preferably, a lower magnetic frame is provided on the top frame opening of the protective lower shell, an upper magnetic frame is provided on the bottom frame opening of the protective upper shell, a magnetic ring is fixedly connected to the middle of the top end of the protective upper shell, and a rubidium magnetic ring that cooperates with the magnetic ring is fixedly connected to the bottom of the fixed end of the hydraulic cylinder; a guide strip opening is provided on one side of the protective upper shell to vertically cooperate with the liquid injection valve tube.

[0006] Preferably, observation ports are provided on the front and rear end surfaces of the protective lower shell and the protective upper shell, and transparent explosion-proof glass is installed in the observation ports; a buffer rubber ring is fixed on the inner top surface of the protective upper shell, and the telescopic end of the hydraulic cylinder passes through the buffer rubber ring.

[0007] Preferably, the longitudinal movement mechanism includes a screw rotatably arranged inside the rectangular opening, a servo motor arranged inside the rear end of the base and a threaded seat sleeved on the screw, guide strip openings are longitudinally opened on both sides of the top surface of the base, a sliding seat is slidably provided inside the guide strip opening, mounting grooves are opened on the top of the threaded seat and the sliding seat, and connecting blocks are vertically movable in the mounting grooves, the top of the connecting block is fixedly connected to the bottom of the movable seat, and the bottom surface of the connecting block is longitudinally equidistantly provided with multiple vertical return springs.

[0008] Preferably, the driving assembly includes a threaded rod that is vertically rotatable and arranged on both sides of the inner bottom surface of the protective lower shell, a driving cavity opened on both sides of the bottom of the protective lower shell, and a self-locking motor installed inside the driving cavity for driving the threaded rod. Threaded tubes are vertically provided on both sides of the top of the lifting seat to cooperate with the threaded rod, and the threaded tubes are sleeved on the threaded rods. Guide rods are vertically movably penetrated at the four corners of the bottom surface of the lifting seat, and the bottom ends of the guide rods are fixedly connected to the inner bottom surface of the protective lower shell.

[0009] Preferably, a supporting spring for supporting the lifting seat is movably sleeved on the guide rod below the lifting seat, the lower rod body of the threaded rod is a smooth rod, and the height of the supporting spring is lower than the height of the bottom end of the threaded section of the threaded rod.

[0010] Preferably, an electric push cylinder is vertically provided on the inner bottom surface of the protective lower shell inside the four guide rods, and a lifting plate for lifting the lifting seat is installed on the top of the telescopic end of the electric push cylinder. By starting the electric push cylinder, the lifting plate is driven to abut against the bottom of the lifting seat, the lifting seat is lifted, and the threaded tube that has been detached from the threaded section on the threaded rod is re-screwed and connected.

[0011] Preferably, the anti-top mechanism includes an anti-top plug that is movably sealed and arranged in the lower part of the supporting stem, and an inverted cone-shaped abutment block is provided in the middle of the bottom surface of the anti-top plug. The bottom of the lifting seat is fixedly connected to an abutment seat with a notch facing upward, and the top of the abutment seat is fixedly connected to stabilizing rods on all sides. The lower part of the outer wall of the supporting stem is rotatably sleeved with a buffer ring, and the outer wall circumference of the buffer ring is fixedly connected with a stabilizing sleeve that is movably sleeved on the stabilizing rod, and a buffer spring is movably sleeved on the stabilizing rod below the stabilizing sleeve, and the bottom end of the abutment block is movably abutted against the top surface of the abutment seat.

[0012] Preferably, a flange ring is fixed to the top of the supporting stem, and a buffer space is separated from the bottom of the flange ring and the top of the lifting seat. A plurality of anti-rotation plates are equidistantly provided on the circumferential side of the circular opening of the lifting seat, a plurality of damping strips are fixed to the top surface of the anti-rotation plate, and a plurality of anti-slip grooves are equidistantly provided on the bottom of the flange ring; a multi-ring rotating ring plate is installed in the top opening of the supporting stem, a drop rubber hopper is installed in the middle of the inner ring of the rotating ring plate, and a plurality of liquid holes are equidistantly provided on the top surface of the rotating ring plate.

[0013] Preferably, the bottom opening of the lower pressure seat is connected to the top of the connecting seat, a downward convex inner rubber ring is installed in the lower opening of the connecting seat, and the bottom of the connecting seat is provided with a sealing flange for connecting to the valve housing to be tested.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention facilitates the water pressure test operation when the valve housing is closed through the cooperation of the lifting seat with the anti-top mechanism and the lower pressure seat, and can effectively improve the accuracy of the strength test of the valve housing, and can apply secondary pressure to the water body inside the valve housing, so that when the liquid transmits pressure in the valve housing, the pressure at each point inside the valve housing is equal, and then the test results are used to judge whether the overall strength and sealing performance of the pipeline or container are qualified; water pressure testing can be effectively carried out to ensure the safety and reliability of the overall structural strength of the valve housing; through the automatic merging of the protective upper shell and the protective lower shell, an overall protective structure is formed to avoid water splashing when the valve housing is subjected to water pressure testing; and through the cooperation of the magnetic ring on the protective upper shell and the rubidium magnetic ring at the bottom of the fixed end of the hydraulic cylinder, the protective upper shell can be magnetically suspended when it is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a structural schematic diagram of another perspective of the overall structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the protective lower shell, base and movable seat structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the protective lower shell and internal structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the protective upper shell, magnetic ring and rubidium magnetic ring structure of the present invention;

[0021] Figure 6 This is a schematic diagram of the bottom structure of the connecting base of the present invention;

[0022] Figure 7 This is a schematic diagram of the internal structure of the protective lower shell of the present invention;

[0023] Figure 8 This is a schematic structural diagram of the positional relationship between the sliding seat and the connecting block of the present invention;

[0024] Figure 9 This is a schematic diagram of the supporting base and rotating ring plate structure of the present invention;

[0025] Figure 10 This is a schematic diagram of the structure of the rotating ring plate and the falling glue hopper of the present invention;

[0026] Figure 11 It is a schematic diagram of the anti-lift mechanism and the supporting base structure of the present invention;

[0027] Figure 12 This is a schematic diagram of the structure of the reverse plug and the abutment block of the present invention;

[0028] Figure 13 It is a cross-sectional view of the supporting stem and the reverse plug structure of the present invention.

[0029] Serial numbers in the figure: 1. Base; 2. Mounting frame; 3. Hydraulic cylinder; 4. Lower pressure seat; 5. Connecting seat; 6. Moving seat; 7. Protective lower shell; 8. Screw; 9. Threaded seat; 10. Servo motor; 11. Protective upper shell; 12. Magnetic ring; 13. Rubber ring; 14. Upper magnetic frame; 15. Lower magnetic frame; 16. Lifting seat; 17. Guide rod; 18. Threaded rod; 19. Self-locking motor; 20. Supporting tube seat; 21. Rotating ring plate; 22. Anti-rotation plate; 23. Support spring; 24. Buffer ring; 25. Abutment seat; 26. Stabilizing rod; 27. Buffer spring; 28. Dropping rubber bucket; 29. ​​Anti-top plug; 30. Abutment block; 31. Sliding seat; 32. Connecting block; 33. Return spring; 34. Electric push cylinder; 35. Lifting plate; 36. Liquid injection valve tube; 37. Insert rubber ring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Example 1: See Figures 1 to 13 , a strength detection device for a valve housing comprises a base 1, a mounting frame 2 is installed on the top of the base 1, a hydraulic cylinder 3 is installed vertically through the top of the mounting frame 2, a lower pressure seat 4 is installed at the bottom of the telescopic end of the hydraulic cylinder 3, and a connecting seat 5 for connecting the liquid inlet of the valve housing is installed at the bottom of the lower pressure seat 4, a movable seat 6 is provided on the top surface of the base 1 for sliding, a protective lower shell 7 is provided on the top of the movable seat 6, a lifting seat 16 is provided for horizontal movement inside the protective lower shell 7, a driving component for lifting the lifting seat 16 is provided inside the protective lower shell 7, a circular opening is provided in the middle of the lifting seat 16, a supporting stem 20 is provided for vertical movement inside the circular opening, and an anti-top mechanism for secondary pressurization inside the valve housing is provided at the bottom end of the supporting stem 20; a rectangular opening is provided longitudinally on the top surface of the base 1, and a A longitudinal movement mechanism driven by the movable seat 6; a protective upper shell 11 is installed on the telescopic end of the hydraulic cylinder 3, which cooperates with the protective lower shell 7. One side of the lower pressure seat 4 is fixedly connected to the liquid injection valve tube 36, and the other side of the outer wall of the lower pressure seat 4 is provided with an electronic exhaust valve tube; through the cooperation of the lifting seat 16 with the anti-top mechanism and the lower pressure seat 4, it is convenient to perform water pressure testing on the valve shell when it is closed, and can effectively improve the accuracy of the strength test of the valve shell, and can perform secondary pressure on the water body inside the valve shell, so that when the liquid transmits pressure in the valve shell, the pressure at each point inside the valve shell is equal, and then the test results are used to judge whether the overall strength and sealing performance of the pipeline or container are qualified; water pressure testing can be effectively carried out to ensure the safety and reliability of the overall structural strength of the valve shell.

[0032] In the present invention, a lower magnetic frame 15 is provided on the top frame opening of the protective lower shell 7, an upper magnetic frame 14 is provided on the bottom frame opening of the protective upper shell 11, a magnetic ring 12 is fixedly connected to the middle of the top of the protective upper shell 11, and a rubidium magnetic ring 13 that cooperates with the magnetic ring 12 is fixedly connected to the bottom of the fixed end of the hydraulic cylinder 3; a guide strip opening is provided on one side of the protective upper shell 11 to vertically cooperate with the injection valve tube 36; observation ports are provided on the front and rear end surfaces of the protective lower shell 7 and the protective upper shell 11, and transparent explosion-proof glass is installed in the observation ports; a buffer rubber ring is fixedly connected to the inner top surface of the protective upper shell 11, and the telescopic end of the hydraulic cylinder 3 is connected from the buffer rubber The ring passes through; the bottom opening of the lower pressure seat 4 is communicated with the top of the connecting seat 5, and a downward convex inner rubber ring 37 is installed in the lower opening of the connecting seat 5. The bottom of the connecting seat 5 is provided with a sealing flange for connecting to the valve housing to be tested; through the automatic merging of the protective upper shell 11 and the protective lower shell 7, it is convenient to form an overall protective structure to avoid water splashing when the valve housing is subjected to a water pressure test; and through the cooperation of the magnetic ring 12 on the protective upper shell 11 and the rubidium magnetic ring 13 at the bottom of the fixed end of the hydraulic cylinder 3, it is convenient to magnetically suspend the protective upper shell 11 when it is not in use.

[0033] Example 2: The technical solution is basically the same as that of Example 1, except that Figures 7 to 10 As shown, the longitudinal movement mechanism includes a screw 8 rotatably arranged inside the rectangular opening, a servo motor 10 arranged inside the rear end of the base 1 and a threaded seat 9 sleeved on the screw 8. Guide strip openings are longitudinally opened on both sides of the top surface of the base 1, and a sliding seat 31 is slidably provided inside the guide strip opening. The tops of the threaded seat 9 and the sliding seat 31 are provided with mounting slots, and connecting blocks 32 are vertically movable in the mounting slots. The top of the connecting block 32 is fixedly connected to the bottom of the moving seat 6, and the bottom surface of the connecting block 32 is longitudinally equidistantly provided with multiple vertical return springs 33; the longitudinal movement mechanism makes it easy to drive the moving seat 6 to move back and forth on the top of the base 1, which is convenient for the operator to operate The valve housing is disassembled and assembled; the driving assembly includes a threaded rod 18 that is vertically rotated and arranged on both sides of the inner bottom surface of the protective lower shell 7, a driving chamber opened on both sides of the bottom of the protective lower shell 7 and a self-locking motor 19 installed inside the driving chamber for driving the threaded rod 18. Threaded tubes are vertically provided on both sides of the top of the lifting seat 16 to cooperate with the threaded rod 18, and the threaded tubes are sleeved on the threaded rod 18. The four corners of the bottom surface of the lifting seat 16 are vertically movably penetrated by guide rods 17. The bottom end of the guide rod 17 is fixedly connected to the inner bottom surface of the protective lower shell 7. Through the setting of the driving assembly, the lifting seat 16 can be lifted and lowered, which is convenient for the storage and protection operation of the valve housing.

[0034] In the present invention, a supporting spring 23 for supporting the lifting seat 16 is movably sleeved on the guide rod 17 below the lifting seat 16. The lower rod body of the threaded rod 18 is in the shape of a bare rod, and the height of the supporting spring 23 is lower than the height of the bottom end of the threaded section of the threaded rod 18. An electric push cylinder 34 is vertically provided on the inner bottom surface of the protective lower shell 7 inside the four guide rods 17. A lifting plate 35 for lifting the lifting seat 16 is installed on the top of the telescopic end of the electric push cylinder 34. By starting the electric push cylinder 34, the lifting plate 35 is driven to abut against the bottom of the lifting seat 16, and the lifting seat 16 is lifted, so that the threaded pipe that has been detached from the threaded section on the threaded rod 18 is re-screwed and connected.

[0035] Example 3: The technical solution is basically the same as that of Example 1, except that Figure 6 、 Figures 9 to 13 As shown, the anti-top mechanism includes an anti-top plug 29 movably and sealably arranged in the lower part of the supporting tube seat 20, and an inverted cone-shaped abutment block 30 is provided in the middle of the bottom surface of the anti-top plug 29. The bottom of the lifting seat 16 is fixedly connected to an abutment seat 25 with a notch facing upwards, and the top of the abutment seat 25 is fixedly connected with a stabilizing rod 26 on all sides. A buffer ring 24 is rotatably sleeved on the lower part of the outer wall of the supporting tube seat 20, and the outer wall circumference of the buffer ring 24 is fixedly connected with a stabilizing sleeve movably sleeved on the stabilizing rod 26. A buffer spring 27 is movably sleeved on the stabilizing rod 26 below the stabilizing sleeve, and the bottom end of the abutment block 30 is movably abutted against the top surface of the abutment seat 25; a flange ring is fixedly connected to the top of the supporting tube seat 20, and a buffer space is separated between the bottom of the flange ring and the top of the lifting seat 16. A plurality of anti-rotation plates 22 are equidistantly provided around the circular mouth of the lowering seat 16, a plurality of damping strips are fixed to the top surface of the anti-rotation plates 22, and a plurality of anti-slip grooves are equidistantly provided at the bottom of the flange ring; when the supporting base 20 is pressurized and lowered, the flange ring at its upper end can abut against the top of the anti-rotation plate 22 to prevent the supporting base 20 from rotating horizontally in the circular mouth; a multi-ring rotating ring plate 21 is installed in the top opening of the supporting base 20, and a falling rubber bucket 28 is installed in the middle of the inner ring of the rotating ring plate 21, and a plurality of liquid holes are equidistantly provided on the top surface of the rotating ring plate 21, and the plurality of liquid holes can be selectively sealed by sealing plugs, leaving only local liquid holes for water circulation, thereby improving the effect of the anti-top plug column 29 in promoting water pressurization.

[0036] Working Principle: In this embodiment, the present invention also proposes a method for using a strength detection device for a valve housing, comprising the following steps:

[0037] Step 1: First, electrically connect the various electrical devices in the device with the external control device, then start the electric push cylinder 34 to drive the lifting plate 35 to abut against the bottom of the lifting seat 16, lift the lifting seat 16, and re-screw the threaded pipe that has been separated from the threaded section of the threaded rod 18. Then, start the self-locking motor 19 to drive the threaded rod 18 to rotate forward. The forward rotating threaded rod 18 can lift the lifting seat 16 from the protective lower shell 7; then, the top surface of the lifting seat 16 is lifted out of the top of the protective lower shell 7. Then, the valve housing to be strength tested is installed on the top of the supporting tube 20 on the lifting seat 16, so that the liquid outlet port of the valve housing is sealed and connected to the supporting tube 20.

[0038] Step 2: Start the hydraulic cylinder 3 to drive the lower pressure seat 4 to descend initially. At this time, connect the liquid injection valve pipe 36 on the lower pressure seat 4 to the external pressurized liquid feeding equipment. Then, fix the connecting seat 5 at the bottom of the lower pressure seat 4 to the water inlet of the valve housing to be tested. Then start the driving assembly to drive the lifting seat 16 to fall back, and disengage the threaded tube on the lifting seat 16 from the threaded end of the threaded rod 18, thereby avoiding the situation where the threaded rod 18 bears the weight during the downward pressure test. In the process of the lifting seat 16 falling back, the hydraulic cylinder 3 also synchronously brings the lower pressure seat 4 down, so that the valve housing part to be tested can fall into the protective lower shell 7.

[0039] Step three: At the same time, before the lower pressure seat 4 descends, the magnetic ring 12 is separated from the rubidium magnetic ring 13. When the lower pressure seat 4 descends, the distance between the protective upper shell 11 and the protective lower shell 7 is shortened, so that the protective upper shell 11 can be stably magnetically attracted to the lower magnetic frame 15 on the protective lower shell 7 through the upper magnetic frame 14, thereby automatically merging the protective upper shell 11 and the protective lower shell 7 to form an integral protective structure, thereby avoiding water splashing when the valve housing is subjected to a water pressure test;

[0040] Step 4: When conducting a closed water pressure test on the valve shell strength, the external booster liquid supply device is used to supply liquid to the lower pressure seat 4, and then the water enters the valve shell to be tested through the connecting seat 5. The air inside the valve shell is discharged by opening the exhaust manifold. It is necessary to ensure that the air in the pipeline is completely discharged to avoid air hammer or water hammer. When water is observed to flow out of the exhaust valve pipe, the exhaust valve is slowly closed to ensure that there is no residual air in the pipeline. Then, a pressure test is performed, and the external booster liquid injection device is used to increase the pressure to three times the normal water pressure (such as about 1.0 MPA) and maintain it for a period of time (such as half an hour to three hours). Then, the water pressure of the valve shell is tested. The test is conducted in accordance with API, HI, and ANSI regulations, or using a liquid with a pressure of at least 1.5 times the maximum allowable working pressure. This test ensures that the valve housing can withstand the maximum working pressure of the pump to prevent rupture during operation. Observe pressure changes: Check the pressure gauge pointer for changes. If the change is small, the pipeline is normal; if the change is large, there may be a leak. Observe whether the pressure is maintained: When the design pressure is reached, maintain constant pressure for a period of time (such as one hour) to check for leaks or abnormalities in various parts of the valve housing and joints. This can determine the overall pressure-bearing strength of the valve housing.

[0041] Step five, in order to further increase the pressure acting on the inside of the valve housing, the hydraulic cylinder 3 is started to drive the lower pressure seat 4 to press down the tested valve housing. The lowering of the valve housing can make the bottom end of the supporting stem 20 move toward the abutment seat 25, and then make the anti-top plug 29 move toward the internal seal of the supporting stem 20, and then apply secondary pressure to the water inside the valve housing, so that when the liquid transmits pressure in the valve housing, the pressure at each point is equal. The overall strength and sealing performance of the pipeline or container are judged according to the test results. Through the above steps, the water pressure test can be effectively carried out to ensure the safety and reliability of the overall structural strength of the valve housing.

[0042] Step 6: After completing the strength test of the valve housing, start the reset of each mechanism, and then remove the valve housing that has completed the test.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A strength detection device for a valve housing, comprising a base (1), characterized in that: The top of the base (1) is provided with a mounting frame (2), the top of the mounting frame (2) is provided with a hydraulic cylinder (3) vertically penetrated, the bottom of the telescopic end of the hydraulic cylinder (3) is provided with a lower pressure seat (4), the bottom of the lower pressure seat (4) is provided with a connecting seat (5) for connecting the liquid inlet of the valve housing, the top surface of the base (1) is provided with a movable seat (6) for sliding, the top of the movable seat (6) is provided with a protective lower shell (7), the interior of the protective lower shell (7) is provided with a lifting seat (16) for horizontal movement, the interior of the protective lower shell (7) is provided with a driving component for lifting the lifting seat (16), the middle of the lifting seat (16) is provided with a circular opening, the circular opening is provided with a supporting seat (20) for vertical movement, the valve housing to be subjected to strength testing is installed on the top of the supporting seat (20), and the bottom of the supporting seat (20) is provided with a reverse top mechanism for secondary pressurization inside the valve housing; The top surface of the base (1) is longitudinally provided with a rectangular opening, and a longitudinal movement mechanism for driving the movable seat (6) is provided in the rectangular opening; a protective upper shell (11) that cooperates with the protective lower shell (7) is installed on the telescopic end of the hydraulic cylinder (3); and a liquid injection valve pipe (36) is fixedly connected to one side of the lower pressure seat (4); The anti-top mechanism includes an anti-top plug (29) movably sealed and arranged in the lower part of the supporting tube seat (20), an inverted cone-shaped abutting block (30) is provided in the middle of the bottom surface of the anti-top plug (29), an abutting seat (25) with a notch facing upward is fixedly connected to the bottom of the lifting seat (16), and a stabilizing rod (26) is fixedly connected to the top of the abutting seat (25) on all sides, a buffer ring (24) is rotatably sleeved on the lower part of the outer wall of the supporting tube seat (20), and a stabilizing sleeve movably sleeved on the stabilizing rod (26) is fixedly connected to the outer wall side of the buffer ring (24), and a buffer spring (27) is movably sleeved on the stabilizing rod (26) below the stabilizing sleeve, and the bottom end of the abutting block (30) is movably abutted against the top surface of the abutting seat (25); The top of the supporting stem (20) is fixed with a flange ring, and a buffer space is provided between the bottom of the flange ring and the top of the lifting seat (16). A plurality of anti-rotation plates (22) are equidistantly provided on the circumferential side of the circular opening of the lifting seat (16). The top surface of the anti-rotation plate (22) is fixed with a plurality of damping strips, and a plurality of anti-slip grooves are equidistantly provided on the bottom of the flange ring; a multi-ring rotating ring plate (21) is installed in the top opening of the supporting stem (20), a drop glue bucket (28) is installed in the middle of the inner ring of the rotating ring plate (21), and a plurality of liquid holes are equidistantly provided on the top surface of the rotating ring plate (21); by descending the valve housing, the bottom end of the supporting stem (20) can be moved toward the abutting seat (25), thereby causing the anti-top plug (29) to move toward the inside of the supporting stem (20) for sealing, thereby applying secondary pressure to the water inside the valve housing.

2. A strength detection device for a valve housing according to claim 1, characterized in that: A lower magnetic frame (15) is provided on the top frame opening of the protective lower shell (7), an upper magnetic frame (14) is provided on the bottom frame opening of the protective upper shell (11), a magnetic ring (12) is fixedly connected to the middle of the top end of the protective upper shell (11), and a rubidium magnetic ring (13) that cooperates with the magnetic ring (12) is fixedly connected to the bottom of the fixed end of the hydraulic cylinder (3); a guide strip opening is opened on one side of the protective upper shell (11) to vertically cooperate with the injection valve pipe (36).

3. A strength detection device for a valve housing according to claim 2, characterized in that: Observation ports are provided on the front and rear end surfaces of the protective lower shell (7) and the protective upper shell (11), and transparent explosion-proof glass is installed in the observation ports; a buffer rubber ring is fixed to the inner top surface of the protective upper shell (11), and the telescopic end of the hydraulic cylinder (3) passes through the buffer rubber ring.

4. A strength detection device for a valve housing according to claim 1, characterized in that: The longitudinal movement mechanism includes a lead screw (8) rotatably arranged inside the rectangular opening, a servo motor (10) arranged inside the rear end of the base (1), and a threaded seat (9) sleeved on the lead screw (8), guide strip openings are longitudinally opened on both sides of the top surface of the base (1), a sliding seat (31) is slidably provided inside the guide strip opening, the tops of the threaded seat (9) and the sliding seat (31) are both provided with mounting slots, and connecting blocks (32) are vertically movable in the mounting slots, the top of the connecting block (32) is fixedly connected to the bottom of the movable seat (6), and the bottom surface of the connecting block (32) is longitudinally equidistantly provided with a plurality of vertical return springs (33).

5. The strength detection device for a valve housing according to claim 1, characterized in that: The driving assembly includes a threaded rod (18) that is vertically rotatable and arranged on both sides of the inner bottom surface of the protective lower shell (7), a driving cavity opened on both sides of the bottom of the protective lower shell (7), and a self-locking motor (19) installed inside the driving cavity for driving the threaded rod (18). Both sides of the top of the lifting seat (16) are vertically matched with the threaded rod (18) and penetrated by a threaded tube, and the threaded tube is sleeved on the threaded rod (18). The four corners of the bottom surface of the lifting seat (16) are vertically movably penetrated by a guide rod (17), and the bottom end of the guide rod (17) is fixedly connected to the inner bottom surface of the protective lower shell (7).

6. A strength detection device for a valve housing according to claim 5, characterized in that: A supporting spring (23) for supporting the lifting seat (16) is movably sleeved on the guide rod (17) below the lifting seat (16); the lower rod body of the threaded rod (18) is in the shape of a bare rod; and the height of the supporting spring (23) is lower than the height of the bottom end of the threaded section of the threaded rod (18).

7. A strength detection device for a valve housing according to claim 6, characterized in that: An electric push cylinder (34) is vertically provided on the inner bottom surface of the protective lower shell (7) inside the four guide rods (17), and a lifting plate (35) for lifting the lifting seat (16) is installed on the top of the telescopic end of the electric push cylinder (34). By starting the electric push cylinder (34), the lifting plate (35) is driven to abut against the bottom of the lifting seat (16), and the lifting seat (16) is lifted, so that the threaded pipe that has been separated from the threaded section on the threaded rod (18) is screwed back and connected.

8. The strength detection device for a valve housing according to claim 2, characterized in that: The bottom opening of the lower pressure seat (4) is communicated with the top of the connecting seat (5), a downward convex inner rubber ring (37) is installed in the lower opening of the connecting seat (5), and a sealing flange for connecting to the housing of the valve to be tested is provided at the bottom of the connecting seat (5).

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