Valve testing method

Abstract

The invention belongs to the technical field of valve testing, and discloses a valve testing method, a testing tool in S3 comprises a base, a working table is arranged at the top end of the base, a water inlet hole is formed in the middle of the top end of the working table, a control table is arranged on the left side of the base, and a valve body is arranged at the top end of the working table. The positioning plates can push the valve body to move, when the four positioning plates make contact with the surface of the valve body at the same time, the inlet end of the bottom end of the valve body can be aligned with the top end of the water inlet hole, and finally the four positioning plates are driven to move towards the surface of the valve body and make contact with the surface of the valve body at the same time; the inlet end of the valve body can be accurately aligned with the top end of the water inlet hole, the accuracy of subsequent testing is further improved, the stress condition of the valve body under the actual working condition is more accurately simulated, and therefore the strength and durability of the valve body are more truly reflected.

Description

Technical Field

[0001] The invention belongs to the technical field of valve testing, and in particular relates to a valve testing method. Background Art

[0002] Valves are key control components in fluid delivery systems, and are mainly used to open and close pipelines, control flow direction, and adjust and control the parameters of the delivery medium. When testing valves, testing the strength of the valves is an essential part, and valve testing devices are required at this time.

[0003] First, the traditional strength testing device usually relies on manual operation to accurately place the valve on the workbench, and requires the inlet end of the valve to be accurately aligned with the water inlet hole on the surface of the workbench. This step seems simple, but it is full of challenges. Since the valve is often designed with a flange structure, these flanges not only increase the volume and weight of the valve, but also directly hinder the operator's intuitive judgment of the alignment process between the inlet end and the water inlet hole. Therefore, the operator can only rely on experience and feel to align. This method is very likely to lead to inaccurate alignment, which in turn affects the accuracy of subsequent tests. Secondly, even if the operator can barely align the inlet end with the water inlet hole, due to the inaccuracy in the alignment process, the inside of the valve body may not be evenly stressed during the pressure test. Under actual working conditions, the valve will be subjected to pressure and force from all directions, and the single-direction pressurization in the traditional test method often cannot fully simulate this complex stress condition, which may cause the test results to deviate from the actual situation and cannot truly reflect the strength performance of the valve under complex working conditions. Summary of the invention

[0004] In order to solve the problem in the above background technology that a valve cannot be accurately aligned with a water inlet hole on a workbench during strength testing, the present invention provides a valve testing method.

[0005] To achieve the above object, the present invention provides the following technical solution: a valve testing method, the testing method is as follows:

[0006] S1: First, the operator can check the surface quality and processing accuracy of valve parts, and check whether the marking content cast or printed on the valve body surface and the nameplate content meet the requirements;

[0007] S2: Then use measuring tools to inspect the dimensions of the pipe fittings to ensure compliance with the standards, and use chemical analysis methods, metallographic analysis methods, etc. to inspect the materials to detect the composition, structure and other properties of the materials;

[0008] S3: Then carry out strength test on the valve body. Before the strength test, it is necessary to close the channel holes at both ends of the valve to ensure that the test medium can fully act on the various pressure-bearing parts of the valve. Then pressurize the inner cavity or inlet end of the valve body to make the valve withstand a certain pressure. The pressure is usually 1.5 times the nominal pressure of the valve. The pressurized medium can be water, oil, air, steam, nitrogen, etc. The specific choice depends on the test requirements and actual conditions. During and after pressurization, carefully observe whether the valve body, valve cover and other parts have leakage, deformation or rupture. If the valve can withstand the predetermined pressure without damage, it means that its strength meets the requirements;

[0009] S4: Finally, the valve body is subjected to a sealing test, which is similar to the strength test. First, the channel holes at both ends of the valve are closed, the valve is opened, and the inner cavity of the valve is pressurized to detect leakage at the pressure boundaries such as the valve body, valve cover, and middle flange connection. If there is no leakage, it indicates that the valve shell sealing performance is good.

[0010] A valve testing device, wherein the testing tool in S3 comprises a base, a workbench is arranged at the top of the base, a water inlet hole is opened in the middle of the top of the workbench, a control console is arranged on the left side of the base, and a valve body is arranged at the top of the workbench;

[0011] A sealing mechanism, which is disposed on the top of the base;

[0012] An extraction mechanism, which is arranged on the right side of the base;

[0013] The positioning mechanism is arranged at the bottom end inside the workbench, the positioning mechanism includes a toothed plate, the toothed plate is rotatably connected to the bottom end inside the workbench, a square hole is opened at the top of the workbench, the bottom end inside the workbench is rotatably connected with a gear 1 meshing with the toothed plate, a worm is fixedly installed on the top of the gear 1, the side surfaces inside the workbench are rotatably connected with a turbine, a screw rod is fixedly installed on the side of the turbine close to the middle of the workbench, a square block 1 is threadedly connected on the surface of the screw rod, a positioning plate located inside the square hole is fixedly installed on the top of the square block 1, a transmission wheel 1 is fixedly installed on the top of the toothed plate, a transmission wheel 2 is rotatably connected to the top of the base, a gear 2 is fixedly installed on the top of the transmission wheel 2, a synchronous belt is connected to the surfaces of the transmission wheel 1 and the transmission wheel 2, a square plate is fixedly installed on the top of the base, a motor 3 and a motor 4 are respectively arranged on the top of the square plate, a connecting plate 3 is fixedly installed on the side opposite to the motor 4, and a gear 3 and a gear 4 are respectively fixedly installed on the output ends of the motor 3 and the motor 4.

[0014] Preferably, it further includes: a testing mechanism, which is arranged inside the workbench. The testing mechanism includes a collection tank, the collection tank is fixedly connected to the inside of the workbench. There is a liquid inlet at the top of the workbench located at the top of the collection tank. One side of the surface of the collection tank is fixedly installed with a square shell. The surface of the square shell is fixedly installed with a connecting pipe, and the other end of the connecting pipe is fixedly connected to the surface of the square shell. The inside of the connecting pipe is provided with a water-absorbing sponge. A sliding block is slidably connected inside the connecting pipe on one side of the water-absorbing sponge. A rotating rod is rotatably connected to the inner cavity of the workbench. The bottom of one end of the rotating rod is hinged to the sliding block. A placement plate is fixedly installed on the side of the motor four away from the gear two. The top of the placement plate is fixedly installed with a sliding rod located inside the rotating rod. A square groove is opened at the top of the square plate. The bottoms of the motor three and the motor four are respectively rotatably connected with rollers located inside the square groove. A spring is fixedly installed at the top of the base, and one end of the spring is fixedly connected to the surface of the motor three. An extrusion assembly is arranged at the top of the square shell, and a return pipe is arranged at the bottom of the square shell.

[0015] Preferably, the sealing mechanism includes a support frame, the support frame is fixedly connected to the top of the base. An electric push rod is fixedly installed inside the top of the support frame. The bottom end of the output shaft of the electric push rod is fixedly installed with a connecting block. A sealing plate is arranged at the bottom end of the connecting block. The top of the sealing plate is fixedly installed with a square block two located inside the bottom end of the connecting block. The number of the square block two is two. Fixing grooves are opened on the opposite sides of the two square block two.

[0016] Preferably, the extraction mechanism includes a water storage tank, the water storage tank is arranged at the right end of the base. A high-pressure water pump is fixedly installed at the top of the water storage tank. The output end of the high-pressure water pump is fixedly installed with a water delivery pipe located inside the water storage tank. The other end of the water delivery pipe extends to the inside of the base and is fixedly connected to the bottom end of the water inlet hole.

[0017] Preferably, it further includes: a fixing mechanism, which is arranged at the top of the connecting block. The fixing mechanism includes a sliding rod, the sliding rod is fixedly connected to the top of the connecting block. A moving block is slidably connected to the surface of the sliding rod. The number of the moving blocks is two. The tops of the two moving blocks are fixedly installed with hinge blocks. A motor two is fixedly installed at the top of the connecting block. The output end of the motor two is fixedly installed with a threaded rod. A threaded block is threadedly connected to the surface of the threaded rod. The rear end of the threaded block is fixedly installed with a hinge plate located at the top of the hinge block. The hinge plate and the hinge block are hinged through a hinge rod. The front end of the moving block is fixedly installed with an L-shaped plate. Connecting plates two are fixedly installed on the opposite sides of the L-shaped plate on the left and right sides of the connecting block. Plug blocks are fixedly installed on the opposite sides of the connecting plates two and located inside the fixing grooves.

[0018] Preferably, support grooves are formed on both sides inside the square hole. A support block is slidably connected inside the support groove. Both ends of the support block are fixedly connected to the surface of the positioning plate. The top end of the positioning plate is arc-shaped and fully fits the bottom end of the valve body. The number of the positioning plates is four, and the positioning plates are arranged in a row at the top of the workbench.

[0019] Preferably, sliding grooves are formed on the front and rear sides of the sliding rod. A pulley is rotatably connected inside the sliding groove, and the pulley can rotate inside the moving block.

[0020] Preferably, a protective shell located on the surface of the fixing mechanism is fixedly installed at the top end of the connecting block. A sealing groove is formed at the top of the rear end of the protective shell, and a plug board is slidably connected inside the sealing groove.

[0021] Preferably, a drain pipe is fixedly installed at the right end of the water storage tank, and a solenoid valve is arranged on the surface of the drain pipe.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In the present invention, the driving gear II is used to rotate the driven pulley II. The driven pulley II drives the synchronous belt, the driven pulley I and the toothed plate to rotate. Then, the toothed plate drives the gear I and the worm to rotate. The worm drives the turbine and the lead screw to rotate. When the lead screw rotates, the square block I moves on the surface of the lead screw. Then, the square block I drives the positioning plate to move towards the surface of the bottom end of the valve body. Next, the positioning plate pushes the valve body to move. When the four positioning plates simultaneously contact the surface of the valve body, the inlet end at the bottom end of the valve body is aligned with the top end of the water inlet hole. Finally, by driving the four positioning plates to move towards the surface of the valve body, when the four positioning plates simultaneously contact the surface of the valve body, the inlet end of the valve body can be accurately aligned with the top end of the water inlet hole, thereby improving the accuracy of subsequent tests and more accurately simulating the force condition of the valve body under actual working conditions, so as to more truly reflect the strength and durability of the valve body;

[0024] In the present invention, during the test, when there is a water leakage phenomenon, the leaked water will enter the inside of the collection tank along the liquid inlet. The water-absorbing sponge absorbs the water source and expands. The expanded water-absorbing sponge drives the sliding block to push the rotating rod to rotate. The rotating rod pushes the sliding rod and the placing plate to move. The placing plate pushes the motor IV and the gear IV to move towards the surface of the gear II. Since the gear IV rotates in the reverse direction and has the same size as the gear II, during the rotation process, it will mesh with the gear II. Then, the gear IV drives the gear II to rotate in the reverse direction. Next, the driven pulley II drives the worm and the turbine to rotate in the reverse direction. Then, the positioning plate moves away from the surface of the valve body, thus canceling the positioning and clamping of the valve body, thereby reminding the operator that the valve body is a defective product, and further improving the accuracy of the test;

[0025] The present invention drives the second motor to rotate the threaded rod, and then causes the threaded block and the hinged plate to descend. Then the hinged plate drives the hinged rod to rotate, and the hinged rod pushes the moving block to move toward each other on the surface of the sliding rod. Then the moving block drives the L-shaped plate and the second connecting plate to move toward each other, and then the second connecting plate drives the plug block away from the inside of the fixed groove. Then the sealing plate can be removed, and finally, by driving the L-shaped plates to move toward each other or relatively, it is convenient for operators to replace different sealing plates, thereby increasing the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the squint device of the present invention;

[0028] Figure 3 This is a schematic diagram showing the water inlet of the present invention;

[0029] Figure 4 It is a schematic diagram of a cross-sectional base of the present invention;

[0030] Figure 5 This is a schematic diagram showing the interior of the workbench of the present invention;

[0031] Figure 6 This is a schematic diagram showing the sealing groove of the present invention;

[0032] Figure 7 This is a schematic diagram of a cross-sectional square block 2 of the present invention;

[0033] Figure 8 It is a schematic diagram of a cross-sectional view of a slide bar of the present invention;

[0034] Figure 9 A schematic diagram showing the testing mechanism of the present invention;

[0035] Figure 10 It is a schematic diagram showing the roller of the present invention.

[0036] In the figure: 1. Base; 2. Workbench; 3. Water inlet hole; 4. Tooth plate; 5. First gear; 6. Worm; 7. Turbine; 8. Lead screw; 9. First square block; 10. Positioning plate; 11. First transmission wheel; 12. Second gear; 13. Second transmission wheel; 14. Synchronous belt; 15. Water storage tank; 16. High-pressure water pump; 17. Water delivery pipe; 18. Support frame; 19. Electric push rod; 20. Connecting block; 21. Sealing plate; 22. Second square block; 23. Fixed groove; 24. Slide bar; 25. Moving block; 26. Hinge block; 27. Second motor; 28. Threaded rod; 29. Threaded block; 30. Hinge plate; 31. Hinge rod; 32. L-shaped plate; 33. Second connecting plate; 34. Insert block; 35. Chute; 36. Pulley; 37. Protective shell; 38. Sealing groove; 39. Insert plate; 40. Square hole; 41. Support groove; 42. Support block; 43. Valve body; 44. Control console; 45. Drain pipe; 46. Solenoid valve; 47. Liquid inlet; 48. Collection tank; 49. Square shell; 50. Connecting pipe; 51. Absorbent sponge; 52. Sliding block; 53. Rotating rod; 54. Square plate; 55. Third motor; 56. Third gear; 57. Fourth motor; 58. Fourth gear; 59. Square groove; 60. Roller; 61. Third connecting plate; 62. Placing plate; 63. Sliding rod; 64. Spring; 65. Extrusion assembly; 66. Return pipe. Specific embodiments

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] As Figures 1 to 10 shown, the test method is as follows:

[0039] S1: First, the operator can detect the surface quality and processing accuracy of the valve parts, and check whether the marked content and nameplate content cast or printed on the valve body surface meet the requirements;

[0040] S2: Then, use measuring tools to detect the dimensions of the pipe fittings to ensure compliance with the standard regulations, and adopt chemical analysis methods, metallographic analysis methods, etc. for material inspection to detect the properties such as the components and structures of the materials;

[0041] S3: Then carry out strength test on the valve body. Before the strength test, it is necessary to close the channel holes at both ends of the valve to ensure that the test medium can fully act on the various pressure-bearing parts of the valve. Then pressurize the inner cavity or inlet end of the valve body to make the valve withstand a certain pressure. The pressure is usually 1.5 times the nominal pressure of the valve. The pressurized medium can be water, oil, air, steam, nitrogen, etc. The specific choice depends on the test requirements and actual conditions. During and after pressurization, carefully observe whether the valve body, valve cover and other parts have leakage, deformation or rupture. If the valve can withstand the predetermined pressure without damage, it means that its strength meets the requirements;

[0042] S4: Finally, the valve body is subjected to a sealing test, which is similar to the strength test. First, the channel holes at both ends of the valve are closed, the valve is opened, and the inner cavity of the valve is pressurized to detect leakage at the pressure boundaries such as the valve body, valve cover, and middle flange connection. If there is no leakage, it indicates that the valve shell sealing performance is good.

[0043] like Figures 1 to 10 As shown, a valve testing device, the testing tool in S3 includes a base 1, a workbench 2 is arranged on the top of the base 1, a water inlet 3 is opened in the middle of the top of the workbench 2, a console 44 is arranged on the left side of the base 1, and a valve body 43 is arranged on the top of the workbench 2;

[0044] A sealing mechanism, which is arranged at the top of the base 1;

[0045] The extraction mechanism is arranged on the right side of the base 1;

[0046] The positioning mechanism is arranged at the bottom end of the workbench 2. The positioning mechanism includes a tooth plate 4, which is rotatably connected to the bottom end of the workbench 2. A square hole 40 is opened at the top of the workbench 2. A gear 5 meshing with the tooth plate 4 is rotatably connected to the bottom end of the workbench 2. A worm 6 is fixedly installed on the top of the gear 5. The side surfaces of the workbench 2 are rotatably connected to turbines 7. A screw 8 is fixedly installed on one side of the turbine 7 close to the middle of the workbench 2. A square block 9 is threadedly connected to the surface of the screw 8. A positioning screw located inside the square hole 40 is fixedly installed on the top of the square block 9. Plate 10, a transmission wheel 11 is fixedly installed on the top of the toothed plate 4, a transmission wheel 2 13 is rotatably connected to the top of the base 1, a gear 2 12 is fixedly installed on the top of the transmission wheel 2 13, a synchronous belt 14 is connected to the surface of the transmission wheel 11 and the transmission wheel 2 13 for transmission, a square plate 54 is fixedly installed on the top of the base 1, a motor 3 55 and a motor 4 57 are respectively arranged on the top of the square plate 54, a connecting plate 3 61 is fixedly installed on the side opposite to the motor 3 55 and the motor 4 57, and a gear 3 56 and a gear 4 58 are respectively fixedly installed on the output ends of the motor 3 55 and the motor 4 57.

[0047] The above scheme is adopted: when the valve body 43 needs to be strength tested, the operator can place the valve body 43 on the top of the workbench 2, and then use the control console 44 to drive the motor three 55 and the motor four 57, and then the motor three 55 will drive the gear three 56 to rotate, and the motor four 57 will drive the gear four 58 to rotate in the opposite direction. Since the gear three 56 is meshed with the gear two 12, the gear three 56 will drive the gear two 12 and the transmission wheel two 13 to rotate. Since the transmission wheel two 13 is connected with the transmission wheel one 11 through the synchronous belt 14, the transmission wheel two 13 will drive the synchronous belt 14 and the transmission wheel one 11 to rotate. Then the transmission wheel one 11 will drive the tooth plate 4 to rotate. Because the tooth plate 4 is meshed with the gear one 5, when the tooth plate 4 rotates, it will drive the gear one 5 to rotate. The gear one 5 will drive the worm 6 to rotate. Since the worm 6 is meshed with the turbine 7, the worm 6 will drive the turbine When the wheel 7 rotates, the turbine 7 will drive the screw rod 8 to rotate, because the screw rod 8 is threadedly connected to the square block 9, and then when the screw rod 8 rotates, the square block 9 will move on the surface of the screw rod 8, and then the square block 9 will drive the positioning plate 10 to move toward the surface of the valve body 43, and then the surface of the positioning plate 10 will contact the surface of the valve body 43, and then the positioning plate 10 will push the valve body 43 to move to the top of the water inlet hole 3, and then the inlet end of the bottom end of the valve body 43 will be aligned with the water inlet hole 3, and then the positioning is completed. After the positioning is completed, the sealing mechanism can be driven to seal the outlet end of the valve body 43. After the sealing is completed, the extraction mechanism can be driven to extract water, and then water will enter the interior of the valve body 43 through the water inlet hole 3, and then the pressure inside the valve body 43 will increase, usually 1.5 times the nominal pressure of the valve body 43, and then the strength of the valve body 43 will be tested.

[0048] like Figure 5 , Figure 9 and Figure 10As shown in the figure, it further includes: a testing mechanism, which is arranged inside the workbench 2. The testing mechanism includes a collection tank 48, and the collection tank 48 is fixedly connected to the inside of the workbench 2. A liquid inlet 47 located at the top of the collection tank 48 is opened at the top of the workbench 2. One side of the surface of the collection tank 48 is fixedly installed with a square shell 49. A connecting pipe 50 is fixedly installed on the surface of the square shell 49, and the other end of the connecting pipe 50 is fixedly connected to the surface of the square shell 49. A water-absorbing sponge 51 is arranged inside the connecting pipe 50. A sliding block 52 located on one side of the water-absorbing sponge 51 is slidably connected inside the connecting pipe 50. A rotating rod 53 is rotatably connected to the inner cavity of the workbench 2. The bottom of one end of the rotating rod 53 is hinged to the sliding block 52. A placing plate 62 is fixedly installed on the side of the motor four 57 away from the gear two 12. A sliding rod 63 located inside the rotating rod 53 is fixedly installed at the top of the placing plate 62. A square groove 59 is opened at the top of the square plate 54. Rollers 60 located inside the square groove 59 are respectively rotatably connected to the inner parts of the bottom ends of the motor three 55 and the motor four 57. A spring 64 is fixedly installed at the top of the base 1, and one end of the spring 64 is fixedly connected to the surface of the motor three 55. An extrusion assembly 65 is arranged at the top of the square shell 49. A return pipe 66 is arranged at the bottom of the square shell 49.

[0049] Through the design of the testing mechanism, during the testing process, when there is a water leakage phenomenon, the leaked water will enter the inside of the collection tank 48 along the liquid inlet 47, and then the water source will pass through the connecting pipe 50 and enter the inside of the square shell 49. Then, the water-absorbing sponge 51 will absorb the water source entering the inside of the square shell 49. During the absorption process, the water-absorbing sponge 51 will expand. Then, the expanded water-absorbing sponge 51 will push the sliding block 52 to move. Then, the sliding block 52 will push the rotating rod 53 to rotate. Then, the sliding rod 63 will move inside the rotating rod 53. Then, the rotating rod 53 will push the sliding rod 63 and the placing plate 62 to move. The placing plate 62 will push the motor four 57 and the gear four 58 towards the surface of the gear two 12. When the motor four 57 and the motor three 55 move, the rollers 60 will roll inside the square groove 59, so that the movement of the motor four 57 and the motor three 55 is smoother. When the motor four 57 moves, the motor three 55 and the gear three 56 will move away from the surface of the gear two 12. During the movement of the motor three 55, the spring 64 will be compressed. Since the gear four 58 rotates in the reverse direction and has the same size as the gear two 12, during the rotation process, it will mesh with the gear two 12. Then, the gear four 58 will drive the gear two 12 to rotate in the reverse direction. Then, the transmission wheel two 13 will drive the worm 6 and the turbine 7 to rotate in the reverse direction. Then, the positioning plate 10 will move away from the surface of the valve body 43, thus reminding the operator that the valve body 43 is a defective product, and thereby improving the testing accuracy.

[0050] When it is necessary to test the next valve body 43, the extrusion assembly 65 can be driven. Then, the extrusion assembly 65 will extrude the water-absorbing sponge 51, thereby squeezing out the water inside the water-absorbing sponge 51. When the water in the water-absorbing sponge 51 is squeezed out, the water-absorbing sponge 51 will recover, and the water source will flow into the inside of the return pipe 66 and then flow back into the inside of the water storage tank 15. Then, the compressed spring 64 will push the motor three 55 and the gear three 56 to move towards the surface of the gear two 12, while the motor four 57 and the gear four 58 will move away from the surface of the gear two 12 again. Then, the valve body 43 can be placed on the top of the workbench 2 again, and then the valve body 43 can be detected.

[0051] As Figure 1 , Figure 6 and Figure 7 shown, the sealing mechanism includes a support frame 18. The support frame 18 is fixedly connected to the top of the base 1. Inside the top of the support frame 18, an electric push rod 19 is fixedly installed. The bottom end of the output shaft of the electric push rod 19 is fixedly installed with a connecting block 20. A sealing plate 21 is arranged at the bottom end of the connecting block 20. At the top end of the sealing plate 21, a square block two 22 located inside the bottom end of the connecting block 20 is fixedly installed. The number of the square blocks two 22 is two. Fixed slots 23 are opened on the opposite sides of the two square blocks two 22.

[0052] With the above scheme: Through the design of the sealing mechanism, after the valve body 43 is positioned, the electric push rod 19 can be driven. Then, the output shaft of the electric push rod 19 will push the connecting block 20 and the sealing plate 21 to descend. Then, the bottom end of the sealing plate 21 will contact the top end of the valve body 43. Then, through the cooperation between the workbench 2 and the sealing plate 21, the top and bottom ends of the valve body 43 can be blocked, avoiding the leakage of the water used in the test during the test process.

[0053] As Figure 2 and Figure 4 shown, the extraction mechanism includes a water storage tank 15. The water storage tank 15 is arranged at the right end of the base 1. A high-pressure water pump 16 is fixedly installed at the top of the water storage tank 15. The output end of the high-pressure water pump 16 is fixedly installed with a water delivery pipe 17 located inside the water storage tank 15. The other end of the water delivery pipe 17 extends into the inside of the base 1 and is fixedly connected to the bottom end of the water inlet hole 3.

[0054] Adopting the above solution: Through the design of the extraction mechanism, after the sealing at both ends of the valve body 43 is completed, the high-pressure water pump 16 can be driven to extract the water source inside the water storage tank 15 through the water delivery pipe 17. Since the other end of the water delivery pipe 17 is fixedly connected to the bottom end of the water inlet hole 3, the extracted water source will pass through the water delivery pipe 17 and enter the inside of the water inlet hole 3, and then the water source will enter the inside of the valve body 43, and then increase the pressure inside the valve body 43 to make the pressure value reach 1.5 times the nominal pressure, and then continue for a period of time, so as to detect the strength of the valve body 43.

[0055] As Figure 7 and Figure 8 shown, it further includes: a fixing mechanism, which is arranged at the top end of the connecting block 20. The fixing mechanism includes a sliding rod 24, the sliding rod 24 is fixedly connected to the top end of the connecting block 20, a moving block 25 is slidably connected to the surface of the sliding rod 24, the number of the moving blocks 25 is two, hinge blocks 26 are fixedly installed at the top ends of the two moving blocks 25, a second motor 27 is fixedly installed at the top end of the connecting block 20, a threaded rod 28 is fixedly installed at the output end of the second motor 27, a threaded block 29 is threadedly connected to the surface of the threaded rod 28, a hinge plate 30 located at the top of the hinge block 26 is fixedly installed at the rear end of the threaded block 29, the hinge plate 30 and the hinge block 26 are hinged by a hinge rod 31, an L-shaped plate 32 is fixedly installed at the front end of the moving block 25, connecting plates two 33 located on the left and right sides of the connecting block 20 are fixedly installed on the opposite sides of the L-shaped plate 32 facing each other, and insertion blocks 34 located inside the fixing groove 23 are fixedly installed on the opposite sides of the connecting plates two 33.

[0056] Adopting the above solution: Through the design of the fixing mechanism, during the detection process, when it is necessary to replace the sealing plate 21 adapted to the size of the valve body 43, the second motor 27 can be driven to rotate the threaded rod 28. Since the threaded rod 28 is threadedly connected to the threaded block 29, when the threaded rod 28 rotates, the threaded block 29 will move downward on the surface of the threaded rod 28. Then the threaded block 29 will drive the hinged plate 30 to descend. Since the hinged plate 30 and the hinged block 26 are hinged by the hinge rod 31, when the hinged plate 30 descends, the hinge rod 31 will rotate. Then the hinge rod 31 will push the hinged blocks 26 to move towards each other. Then the hinged blocks 26 will push the moving blocks 25 to move towards each other on the surface of the sliding rod 24. Then the moving blocks 25 will drive the L-shaped plate 32 and the second connecting plate 33 to move towards each other. Then the second connecting plate 33 will drive the insertion block 34 away from the inside of the fixing groove 23, thereby canceling the limit on the sealing plate 21 and the second square block 22. Then the sealing plate 21 can be removed, and the sealing plate 21 adapted to the size of the valve body 43 can be placed at the bottom end of the connecting block 20, and the second square block 22 can be inserted into the inside of the connecting block 20. Then the second motor 27 can be driven again to rotate the threaded rod 28 in the reverse direction. Then the threaded block 29 and the hinged plate 30 will move upward. Then the hinged plate 30 will drive the hinge rod 31 to rotate again, and the hinge rod 31 will pull the moving blocks 25 and the hinged blocks 26 to move relatively. Then the moving blocks 25 will drive the insertion block 34 into the inside of the fixing groove 23, thereby fixing the sealing plate 21 at the bottom end of the connecting block 20. Then the sealing of the valve body 43 can continue.

[0057] As Figure 4 shown, support grooves 41 are provided on both sides inside the square hole 40. A support block 42 is slidably connected inside the support groove 41, and both ends of the support block 42 are fixedly connected to the surface of the positioning plate 10.

[0058] Adopting the above solution: Through the design of the support groove 41 and the support block 42, when the positioning plate 10 moves relatively, the support block 42 can move inside the support groove 41. Since the surface of the support block 42 fits the inner wall of the support groove 41, the positioning plate 10 can be limited, so that the positioning plate 10 moves smoothly.

[0059] As Figure 6 and Figure 8 shown, sliding grooves 35 are provided on the front and rear sides of the sliding rod 24. A pulley 36 is rotatably connected inside the sliding groove 35, and the pulley 36 can rotate inside the moving block 25. A protective shell 37 located on the surface of the fixing mechanism is fixedly installed at the top end of the connecting block 20. A sealing groove 38 is provided at the top of the rear end of the protective shell 37, and a plug plate 39 is slidably connected inside the sealing groove 38.

[0060] Adopt the above solution: Through the design of the sliding groove 35 and the pulley 36, when the moving block 25 moves, the pulley 36 will rotate inside the sliding groove 35. Through the rotation of the pulley 36, the moving block 25 can move more smoothly. Through the design of the protective shell 37, the sealing groove 38 and the insertion plate 39, since the protective shell 37 is arranged on the surface of the fixing mechanism, the fixing mechanism can be protected. And when the fixing mechanism needs to be maintained, the insertion plate 39 can be pulled out from the inside of the sealing groove 38, and then the operator can maintain the fixing mechanism.

[0061] As Figure 2 and Figure 3 shown, a drain pipe 45 is fixedly installed at the right end of the water storage tank 15. A solenoid valve 46 is arranged on the surface of the drain pipe 45. The top end of the positioning plate 10 is arc-shaped and fits well with the bottom end of the valve body 43. The number of the positioning plates 10 is four, and the positioning plates 10 are arranged in a column at the top end of the workbench 2.

[0062] Adopt the above solution: Through the design of the drain pipe 45 and the solenoid valve 46, when the water source inside the water storage tank 15 needs to be drained, the solenoid valve 46 can be opened, and then the water source inside the water storage tank 15 can flow out from the inside of the drain pipe 45. Through the design of the positioning plate 10, since the positioning plate 10 is arc-shaped, it can fit well with the bottom end of the valve body 43, and then the valve body 43 can be pushed to move. When the four positioning plates 10 are in contact with the surface of the bottom end of the valve body 43 at the same time, the positioning is completed.

[0063] The working principle and usage process of the present invention:

[0064] First, the operator can place the valve body 43 on the top of the workbench 2. Then, the control console 44 can be used to drive the second gear 12. Next, the output end of the second gear 12 will drive the second transmission wheel 13 to rotate. The second transmission wheel 13 will drive the synchronous belt 14, the first transmission wheel 11 and the toothed plate 4 to rotate. Then, the toothed plate 4 will drive the first gear 5 and the worm 6 to rotate. The worm 6 will drive the turbine 7 and the lead screw 8 to rotate. When the lead screw 8 rotates, the first square block 9 will move on the surface of the lead screw 8. Then, the first square block 9 will drive the positioning plate 10 to move towards the surface of the bottom end of the valve body 43. Next, the positioning plate 10 will push the valve body 43 to move. When the four positioning plates 10 are in contact with the surface of the valve body 43 at the same time, the inlet end at the bottom end of the valve body 43 will be aligned with the top end of the water inlet hole 3. After alignment, the electric push rod 19 can be driven to lower the connecting block 20 and the sealing plate 21. Then, the bottom end of the sealing plate 21 will contact the top end of the valve body 43. Through the cooperation between the sealing plate 21 and the workbench 2, the two ends of the valve body 43 can be sealed. After sealing, the high-pressure water pump 16 can be driven to supply water inside the water delivery pipe 17. Then, the water source will pass through the water inlet hole 3 and enter the inside of the valve body 43, thereby increasing the pressure inside the valve body 43. Then, the pressure value will reach 1.5 times the nominal pressure and last for a period of time, so as to detect the strength of the valve body 43;

[0065] During the test, when there is a water leakage phenomenon, the leaked water will enter the inside of the collection tank 48 along the liquid inlet 47. Then, the water source will pass through the connecting pipe 50 and enter the inside of the square shell 49 and be absorbed by the water-absorbing sponge 51. During the absorption process, the water-absorbing sponge 51 will expand. Then, the expanded water-absorbing sponge 51 will drive the sliding block 52 to push the rotating rod 53 to rotate. The rotating rod 53 will push the sliding rod 63 and the placing plate 62 to move. The placing plate 62 will push the fourth motor 57 and the fourth gear 58 towards the surface of the second gear 12. When the fourth motor 57 moves, the third motor 55 and the third gear 56 will move away from the surface of the second gear 12. Since the fourth gear 58 rotates in the reverse direction and has the same size as the second gear 12, during the rotation process, it will mesh with the second gear 12. Then, the fourth gear 58 will drive the second gear 12 to rotate in the reverse direction. Next, the second transmission wheel 13 will drive the worm 6 and the turbine 7 to rotate in the reverse direction. Then, the positioning plate 10 will move away from the surface of the valve body 43, thus reminding the operator that the valve body 43 is a defective product;

[0066] When it is necessary to replace the sealing plate 21 adapted to the size of the valve body 43, the second motor 27 can be driven to rotate the threaded rod 28, and then the threaded block 29 and the hinge plate 30 are lowered. Then, the hinge plate 30 will drive the hinge rod 31 to rotate, and the hinge rod 31 will push the moving block 25 to move towards each other on the surface of the sliding rod 24. Then, the moving block 25 will drive the L-shaped plate 32 and the second connecting plate 33 to move towards each other. Then, the second connecting plate 33 will drive the insertion block 34 away from the inside of the fixing groove 23. Then, the sealing plate 21 can be removed. Then, the sealing plate 21 adapted to the size of the valve body 43 can be placed at the bottom of the connecting block 20, and the second square block 22 is inserted into the connecting block 20. Then, the second motor 27 can be driven again to rotate the threaded rod 28 in the reverse direction, and then the insertion block 34 enters the inside of the fixing groove 23 again to complete the fixation. Then, the valve body 43 can be continuously detected, and finally the operation process is completed.

[0067] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0068] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve testing method, characterized in that: The test method is as follows: S1: First, the operator can detect the surface quality and machining accuracy of the valve components, and check whether the marked content and nameplate content cast or printed on the valve body surface meet the requirements; S2: Then, use measuring tools to detect the dimensions of the pipe fittings to ensure compliance with the standard regulations, and adopt chemical analysis methods, metallographic analysis methods, etc. for material inspection to detect the properties such as the composition and structure of the materials; S3: Use test tools to conduct a strength test on the valve body. Before the strength test, it is necessary to close the passage holes at both ends of the valve to ensure that the test medium can fully act on each pressure-bearing component of the valve. Then, pressurize the valve cavity or the inlet end to make the valve bear a certain pressure, and the pressure is usually 1.5 times the nominal pressure of the valve. And the pressurizing medium can be water, oil, air, steam, nitrogen, etc., and the specific selection depends on the test requirements and actual situation. During and after the pressurization process, carefully observe whether there are any phenomena such as leakage, deformation, or rupture in components such as the valve body and valve cover. If the valve can withstand the predetermined pressure without damage, it indicates that its strength meets the requirements; S4: Finally, conduct a sealing test on the valve body. Similar to the strength test, first close the passage holes at both ends of the valve, open the valve, pressurize the valve cavity, and detect the leakage of the pressure boundaries such as the valve body, valve cover, and middle flange connection. If there is no leakage, it indicates that the shell sealing performance of the valve is good.

2. A valve testing device that adopts a valve testing method as described in claim 1. The testing tool in S3 includes a base (1), and is characterized in that: A workbench (2) is provided at the top of the base (1). A water inlet hole (3) is opened in the middle of the top of the workbench (2). A control console (44) is provided on the left side of the base (1). A valve body (43) is provided on the top of the workbench (2); A sealing mechanism is provided at the top of the base (1); An extraction mechanism is provided on the right side of the base (1); A positioning mechanism is arranged at the bottom end of the workbench (2), the positioning mechanism includes a toothed plate (4), the toothed plate (4) is rotatably connected to the bottom end of the workbench (2), the top end of the workbench (2) is provided with a square hole (40), the bottom end of the workbench (2) is rotatably connected to a gear (5) meshing with the toothed plate (4), the top end of the gear (5) is fixedly mounted with a worm (6), the side surfaces of the workbench (2) are rotatably connected to a turbine (7), a screw rod (8) is fixedly mounted on one side of the turbine (7) close to the middle of the workbench (2), the surface of the screw rod (8) is threadedly connected to a square block (9), the top end of the square block (9) is fixedly mounted with a positioning plate located in the square hole (40) (10), a transmission wheel 1 (11) is fixedly mounted on the top of the toothed plate (4), a transmission wheel 2 (13) is rotatably connected to the top of the base (1), a gear 2 (12) is fixedly mounted on the top of the transmission wheel 2 (13), a synchronous belt (14) is connected to the surfaces of the transmission wheel 1 (11) and the transmission wheel 2 (13) in a transmission manner, a square plate (54) is fixedly mounted on the top of the base (1), a motor 3 (55) and a motor 4 (57) are respectively arranged on the top of the square plate (54), a connecting plate 3 (61) is fixedly mounted on the side of the motor 3 (55) opposite to the motor 4 (57), and a gear 3 (56) and a gear 4 (58) are respectively fixedly mounted on the output ends of the motor 3 (55) and the motor 4 (57).

3. The valve testing device according to claim 2, characterized in that: It further includes: a testing mechanism, which is arranged inside the workbench (2). The testing mechanism includes a collection tank (48), and the collection tank (48) is fixedly connected to the inside of the workbench (2). A liquid inlet (47) located at the top of the collection tank (48) is opened at the top of the workbench (2). On one side of the surface of the collection tank (48), a square shell (49) is fixedly installed. A connecting pipe (50) is fixedly installed on the surface of the square shell (49), and the other end of the connecting pipe (50) is fixedly connected to the surface of the square shell (49). A water-absorbing sponge (51) is arranged inside the connecting pipe (50). A sliding block (52) is slidably connected inside the connecting pipe (50) and is located on one side of the water-absorbing sponge (51). A rotating rod (53) is rotatably connected to the inner cavity of the workbench (2). The bottom of one end of the rotating rod (53) is hinged to the sliding block (52). On the side of the motor four (57) away from the gear two (12), a placement plate (62) is fixedly installed. A sliding rod (63) located inside the rotating rod (53) is fixedly installed at the top of the placement plate (62). A square groove (59) is opened at the top of the square plate (54). Rollers (60) located inside the square groove (59) are respectively rotatably connected to the inner parts of the bottom ends of the motor three (55) and the motor four (57). A spring (64) is fixedly installed at the top of the base (1), and one end of the spring (64) is fixedly connected to the surface of the motor three (55). An extrusion assembly (65) is arranged at the top of the square shell (49), and a return pipe (66) is arranged at the bottom of the square shell (49).

4. The valve testing device according to claim 2, characterized in that: The sealing mechanism includes a support frame (18), and the support frame (18) is fixedly connected to the top of the base (1). An electric push rod (19) is fixedly installed inside the top of the support frame (18). A connecting block (20) is fixedly installed at the bottom end of the output shaft of the electric push rod (19). A sealing plate (21) is arranged at the bottom of the connecting block (20). A square block two (22) located inside the bottom end of the connecting block (20) is fixedly installed at the top of the sealing plate (21). The number of the square blocks two (22) is two, and fixing grooves (23) are opened on the opposite sides of the two square blocks two (22).

5. The valve testing device according to claim 2, characterized in that: The extraction mechanism includes a water storage tank (15), and the water storage tank (15) is arranged at the right end of the base (1). A high-pressure water pump (16) is fixedly installed at the top of the water storage tank (15). A water delivery pipe (17) located inside the water storage tank (15) is fixedly installed at the output end of the high-pressure water pump (16). The other end of the water delivery pipe (17) extends into the inside of the base (1) and is fixedly connected to the bottom end of the water inlet hole (3).

6. The valve testing device according to claim 3, characterized in that: It further includes: a fixing mechanism, which is arranged at the top of the connecting block (20). The fixing mechanism includes a sliding rod (24), the sliding rod (24) is fixedly connected to the top of the connecting block (20), a moving block (25) is slidably connected to the surface of the sliding rod (24), the number of the moving blocks (25) is two, hinge blocks (26) are fixedly installed at the tops of the two moving blocks (25), a second motor (27) is fixedly installed at the top of the connecting block (20), a threaded rod (28) is fixedly installed at the output end of the second motor (27), a threaded block (29) is threadedly connected to the surface of the threaded rod (28), a hinge plate (30) located at the top of the hinge block (26) is fixedly installed at the rear end of the threaded block (29), the hinge plate (30) and the hinge block (26) are hinged by a hinge rod (31), an L-shaped plate (32) is fixedly installed at the front end of the moving block (25), connecting plates two (33) located on the left and right sides of the connecting block (20) are fixedly installed on the opposite sides of the L-shaped plate (32), and inserting blocks (34) located inside the fixing groove (23) are fixedly installed on the opposite sides of the connecting plates two (33).

7. The valve testing device according to claim 2, characterized in that: Support grooves (41) are opened on both sides inside the square hole (40), support blocks (42) are slidably connected inside the support grooves (41), both ends of the support blocks (42) are fixedly connected to the surface of the positioning plate (10), the top end of the positioning plate (10) is arc-shaped and fully fits with the bottom end of the valve body (43), the number of the positioning plates (10) is four, and the positioning plates (10) are arranged in a column at the top of the workbench (2).

8. The valve testing device according to claim 5, characterized in that: Chute grooves (35) are opened on the front and rear sides of the sliding rod (24), pulleys (36) are rotatably connected inside the chute grooves (35), and the pulleys (36) can rotate inside the moving block (25).

9. The valve testing device according to claim 3, characterized in that: A protective shell (37) located on the surface of the fixing mechanism is fixedly installed at the top of the connecting block (20), a sealing groove (38) is opened at the top of the rear end of the protective shell (37), and an inserting plate (39) is slidably connected inside the sealing groove (38).

10. The valve testing device according to claim 4, wherein: A drain pipe (45) is fixedly installed at the right end of the water storage tank (15), and a solenoid valve (46) is arranged on the surface of the drain pipe (45).

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