Valve test bench

Abstract

The invention relates to the technical field of valve tests, in particular to a valve test bench which comprises a support, a liquid storage tank is arranged on the support, a suction pipe is arranged in the liquid storage tank in a communicating mode, a bottom plate is fixedly connected to the outer side wall of the support, an observation opening is formed in the bottom plate, an electromagnetic valve is arranged in the observation opening, and a valve is arranged in the electromagnetic valve. An observation opening is formed in the support, a valve is arranged on the observation opening, a hand wheel is arranged on the side wall of the valve, electric rods are arranged on the two sides of the support, clamping plates are arranged on the electric rods and make contact with the outer wall of the valve, and a detection mechanism is arranged on the support and comprises a hydraulic rod fixedly connected to the support. Through the arrangement of mechanisms such as the inner box, after the fluorescent dye introduced into the valve is detected, the inner box can spray clean water into the valve in a self-adaptive mode at the moment, the fluorescent dye in the valve is washed, and the situation that the fluorescent dye is stored in the detected valve is prevented.

Description

Technical Field

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

[0002] Valves are pipe accessories used to open and close pipes, control flow direction, and adjust and control the parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems and have functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief.

[0003] When conducting internal and external leakage tests on existing valves, the valve is usually immersed in water to see if there are bubbles overflowing from the water, so as to determine whether the valve is leaking internally or externally. However, the immersion test method has many limitations when used. For example, if the valve itself has only a small leak, the bubble generation rate is slow and the bubble volume is small, which is difficult to be directly observed by the naked eye, and it is easy to cause missed detection. In addition, if there is airflow or water flow disturbance in the detection environment, the shape and movement trajectory of the bubble will change, increasing the difficulty of observation and judgment, and affecting the test detection accuracy of the entire valve. Summary of the invention

[0004] The purpose of the present invention is to provide a valve test bench to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve test bench, comprising a bracket, a liquid storage box is arranged on the bracket, a suction pipe is arranged inside the liquid storage box, a bottom plate is fixedly connected to the outer wall of the bracket, an observation port is opened inside the bottom plate, a solenoid valve is arranged inside the observation port, a valve is arranged on the observation port, a hand wheel is arranged on the side wall of the valve, electric rods are arranged on both sides of the bracket, a clamping plate is arranged on the electric rod, the clamping plate is in contact with the outer wall of the valve, a detection mechanism is arranged on the bracket, the detection mechanism comprises a hydraulic rod fixedly connected to the bracket, a mounting plate is arranged at the end of the hydraulic rod, a push rod is rotatably connected to the mounting plate, a driving motor is fixedly connected to the outer wall of the mounting plate, a transmission rod is arranged at the output end of the driving motor, gears are fixedly connected to the outer wall of the transmission rod and the push rod, and the two gears are meshingly arranged.

[0006] Preferably, a left liquid tank, a water storage tank and a right liquid tank are respectively provided on the mounting plate, and external pipe insertion ports are respectively provided inside the left liquid tank, the water storage tank and the right liquid tank, and a liquid storage cylinder is fixedly connected to the outer wall of the push rod, and a partition plate is provided inside the liquid storage cylinder, and the partition plate divides the interior of the liquid storage cylinder into an upper chamber and a lower chamber. The upper and lower sides of the liquid storage cylinder are slidably sleeved with covering rings, and the interiors of the two covering rings are connected with infusion tubes, and the ends of the two infusion tubes away from the covering rings are respectively connected to the interiors of the left liquid tank and the right liquid tank, and the upper and lower sides of the liquid storage cylinder are provided with a plurality of through holes, and the plurality of through holes are respectively connected to the interiors of the upper chamber and the lower chamber.

[0007] Preferably, a blending cylinder is provided at the bottom of the liquid storage cylinder, the end of the push rod passes through the interior of the blending cylinder, a sliding tube is slidably provided through the end of the push rod located inside the blending cylinder, a liquid passage is opened at the end of the sliding tube located inside the push rod, a blocking plug is fixedly connected to the interior of the push rod, the blocking plug blocks the liquid passage, a pressing spring is provided on the sliding tube, and a plurality of magnetic plates are fixedly connected to the outer side wall of the sliding tube.

[0008] Preferably, the interior of the sliding tube is connected to a plurality of telescopic tubes, and ends of the plurality of telescopic tubes are each provided with a telescopic nozzle, and the telescopic nozzle passes through to the outside of the blending cylinder.

[0009] Preferably, a plurality of inner boxes are arranged inside the blending cylinder, a top box is arranged on the top of each of the inner boxes, a sliding groove is opened inside the top box, a trigger member is slidably connected to the inner side wall of the sliding groove, the top of the trigger member has magnetism, the magnetic pole at the top of the trigger member is the same as the magnetic pole of the magnetic plate, a return spring is arranged on the trigger member, an end of the return spring away from the trigger member is fixedly connected to the inner side wall of the sliding groove, a first platform and a second platform are arranged on the bottom of the trigger member, a trigger magnet is slidably arranged inside the top box, a return pressure spring is arranged on the trigger magnet, an end of the return pressure spring away from the trigger magnet is fixedly connected to the inner side wall of the top box.

[0010] Preferably, a top cavity and a bottom cavity are provided inside the inner box, a blocking ring is fixedly connected inside the top cavity, and a liquid injection mechanism is provided inside the blocking ring.

[0011] Preferably, the liquid injection mechanism includes a top tube slidably arranged on the blocking ring, the top tube is hollow, a plurality of liquid inlets are opened on the top tube, a top magnetic block is arranged at the top end of the top tube, the magnetic poles of the top magnetic block are the same as the magnetic poles of the trigger magnet, the top end of the top tube is sealed, and the bottom end is open.

[0012] Preferably, a bottom tube is provided inside the bottom cavity, one end of the top tube away from the top magnetic block slides through the inside of the bottom tube, a pressure spring is provided on the outer wall of the top tube, the other end of the pressure spring is fixedly connected to the outer wall of the bottom tube, a plurality of contact protrusions are provided at the end of the top tube, a plurality of side tubes are connected to the end of the bottom tube, a blocking box is provided inside each of the plurality of side tubes, an inner plate is slidably provided inside the blocking box, a flow port is opened on the inner plate, a return spring is provided on the blocking box, one end of the return spring away from the blocking box is fixedly connected to the outer wall of the bottom tube, the end of the inner plate slides through the inside of the bottom tube and is located directly below the corresponding contact protrusion.

[0013] Preferably, the interiors of the top cavity and the bottom cavity are both connected with a liquid inlet pipe and a rear pipe, and the ends of the liquid inlet pipe and the rear pipe are respectively connected to the interiors of the lower chamber and the upper chamber.

[0014] Preferably, a rotating rod is provided at the bottom of the blending cylinder, a fixing rod is fixedly connected to the outer wall of the mounting plate, a fixing tube is provided at the end of the fixing rod, a pressure plate is provided at the end of the fixing tube, the rotating rod rotates through the interior of the fixing tube and the pressure plate, a liquid outlet is provided at the end of the rotating rod, a plurality of nozzles are connected to the liquid outlet, and a liquid full self-stop valve is provided inside the liquid outlet.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the setting of the mixing cylinder and the inner box and other mechanisms, when the valve needs to be tested for internal leakage, the inner box will inject red water-soluble fluorescent dye into the valve, and then press it through the pressure plate to simulate a high water pressure environment. Then the operator can observe whether there is red fluorescent dye leaking out at the bottom of the valve to determine whether the valve has internal leakage. When the valve is tested for external leakage, the inner box will inject red and yellow fluorescent dyes into the valve to mix them into orange. When the valve contains the mixed orange fluorescent dye, it can be observed on the outside of the valve whether there is orange fluorescent dye leaking out to determine whether the valve is leaking. Fluorescent dye can be used as a valve test liquid and can be observed more intuitively to avoid missed detection.

[0016] 2. Through the setting of the inner box and other mechanisms, when the fluorescent dye is passed into the valve and the test is completed, the inner box will adaptively spray clean water into the valve to flush the fluorescent dye in the valve to prevent the fluorescent dye from remaining in the valve after the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A magnified view of middle; Figure 3 It is a schematic diagram of the local structure of the present invention Figure 1 ; Figure 4 It is a schematic diagram of the local structure of the present invention Figure 2 ; Figure 5 It is a schematic diagram of the local structure of the present invention Figure 3 ; Figure 6 It is a schematic diagram of the internal structure of the blending cylinder of the present invention; Figure 7 The internal structure of the inner box of the present invention is shown in FIG. Figure 1 ; Figure 8 for Figure 7 Enlarged view of middle B; Fig. 9 The internal structure of the inner box of the present invention is shown in FIG. Figure 2 ; Fig.10 for Fig. 9 Enlarged view of middle C; Fig.11 It is a schematic diagram of the internal planar structure of the blending cylinder of the present invention; Fig.12 It is a schematic diagram of the local structure of the present invention Figure 4 ; Fig.13 It is a schematic diagram of the bottom structure of the present invention.

[0018] In the attached drawings, the parts represented by the reference numerals are as follows: 1. bracket; 2. liquid storage box; 3. suction pipe; 4. bottom plate; 5. valve; 6. clamping plate; 7. hydraulic rod; 8. left liquid tank; 9. water storage tank; 10. right liquid tank; 11. mounting plate; 12. driving motor; 13. push rod; 14. gear; 15. blending cylinder; 16. fixing pipe; 17. rotating rod; 18. infusion pipe; 19. covering ring; 20. liquid storage cylinder; 21. through hole; 22. fixing rod; 23. pressure plate; 24. telescopic nozzle; 25. telescopic pipe; 26. blocking plug; 27. sliding pipe; 28. liquid port; 29. ​​magnetic plate; 30. Compression spring; 31. inner box; 32. top box; 33. return spring; 34. trigger member; 35. first platform; 36. second platform; 37. trigger magnet; 38. return spring; 39. blocking ring; 40. top magnetic block; 41. liquid inlet; 42. top tube; 43. pressure spring; 44. bottom tube; 45. contact bump; 46. side tube; 47. blocking box; 48. inner plate; 49. return spring; 50. flow port; 51. liquid inlet tube; 52. rear tube; 53. upper chamber; 54. lower chamber; 55. liquid outlet; 56. nozzle; 57. observation port; 58. top chamber; 59. bottom chamber. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1 - Fig.13 A valve test bench comprises a bracket 1, a liquid storage box 2 is arranged on the bracket 1, a suction pipe 3 is arranged in the interior of the liquid storage box 2, a bottom plate 4 is fixedly connected to the outer wall of the bracket 1, an observation port 57 is opened inside the bottom plate 4, a solenoid valve is arranged inside the observation port 57, a valve 5 is arranged on the observation port 57, a hand wheel is arranged on the side wall of the valve 5, electric rods are arranged on both sides of the bracket 1, a clamping plate 6 is arranged on the electric rod, the clamping plate 6 is in contact with the outer wall of the valve 5, a detection mechanism is arranged on the bracket 1, the detection mechanism comprises a hydraulic rod 7 fixedly connected to the bracket 1, a mounting plate 11 is arranged at the end of the hydraulic rod 7, a push rod 13 is rotatably connected to the mounting plate 11, a driving motor 12 is fixedly connected to the outer wall of the mounting plate 11, a transmission rod is arranged at the output end of the driving motor 12, gears 14 are fixedly connected to the outer walls of the transmission rod and the push rod 13, and the two gears 14 are meshingly arranged.

[0021] A left liquid tank 8, a water storage tank 9 and a right liquid tank 10 are respectively arranged on the mounting plate 11, and external pipe insertion ports are arranged inside the left liquid tank 8, the water storage tank 9 and the right liquid tank 10, and a liquid storage cylinder 20 is fixedly connected to the outer wall of the push rod 13, and a partition plate is arranged inside the liquid storage cylinder 20, and the partition plate divides the interior of the liquid storage cylinder 20 into an upper chamber 53 and a lower chamber 54. The upper and lower sides of the liquid storage cylinder 20 are slidably sleeved with a covering ring 19, and the interiors of the two covering rings 19 are connected with an infusion tube 18, and the ends of the two infusion tubes 18 away from the covering ring 19 are respectively connected to the interiors of the left liquid tank 8 and the right liquid tank 10, and the upper and lower sides of the liquid storage cylinder 20 are opened with a plurality of through holes 21, and the plurality of through holes 21 are respectively connected to the interiors of the upper chamber 53 and the lower chamber 54.

[0022] The bottom of the liquid storage cylinder 20 is provided with a blending cylinder 15, and the bottom of the blending cylinder 15 is connected to a rotating rod 17. The outer wall of the mounting plate 11 is fixedly connected to a fixing rod 22, and the end of the fixing rod 22 is provided with a fixing tube 16, and the end of the fixing tube 16 is provided with a pressure plate 23. The rotating rod 17 rotates through the inside of the fixing tube 16 and the pressure plate 23, and the end of the rotating rod 17 is provided with a liquid outlet 55, and the liquid outlet 55 is connected to a plurality of nozzles 56. A liquid full self-stop valve is provided inside, and the end of the push rod 13 passes through the interior of the blending cylinder 15. A sliding tube 27 is slidably provided on the end of the push rod 13 located inside the blending cylinder 15. A liquid passage 28 is provided at one end of the sliding tube 27 located inside the push rod 13. A blocking plug 26 is fixedly connected to the interior of the push rod 13, and the blocking plug 26 blocks the liquid passage 28. A pressing spring 30 is provided on the sliding tube 27, and a plurality of magnetic plates 29 are fixedly connected to the outer wall of the sliding tube 27.

[0023] The interior of the sliding pipe 27 is connected to a plurality of telescopic pipes 25 , and ends of the plurality of telescopic pipes 25 are all provided with telescopic nozzles 24 , which penetrate to the outside of the blending cylinder 15 .

[0024] A plurality of inner boxes 31 are arranged inside the blending cylinder 15, and a top box 32 is arranged on the top of each of the inner boxes 31. A sliding groove is opened inside the top box 32, and a trigger member 34 is slidably connected to the inner side wall of the sliding groove. The top of the trigger member 34 has magnetic force, and the magnetic pole at the top of the trigger member 34 is the same as the magnetic pole of the magnetic plate 29. A return spring 33 is arranged on the trigger member 34, and one end of the return spring 33 away from the trigger member 34 is fixedly connected to the inner side wall of the sliding groove. A first platform 35 and a second platform 36 are arranged at the bottom of the trigger member 34. A trigger magnet 37 is slidably arranged inside the top box 32, and a return pressure spring 38 is arranged on the trigger magnet 37, and one end of the return pressure spring 38 away from the trigger magnet 37 is fixedly connected to the inner side wall of the top box 32.

[0025] A top cavity 58 and a bottom cavity 59 are formed inside the inner box 31 . A blocking ring 39 is fixedly connected to the top cavity 58 . A liquid injection mechanism is disposed inside the blocking ring 39 .

[0026] In this embodiment, when it is necessary to test the valve 5, the operator can contact the bottom of the valve 5 to the observation port 57, and then the electric rod connected to the clamping plate 6 can be used to close the two clamping plates 6 to clamp and fix the valve 5. After the valve 5 is clamped and fixed, the operator can use the hand wheel on the valve 5 to put the valve 5 in a closed state without circulation to test the internal leakage of the valve 5. When it is necessary to test the internal leakage of the valve 5, the operator can shrink the hydraulic rod 7. When the hydraulic rod 7 shrinks, the pressure plate 23 will enter the valve 5, and the subsequent operator can open the drive at low power. The motor 12 drives the top rod 13 to rotate synchronously through the transmission rod and the gear 14. When the top rod 13 rotates at a low speed, it will drive the blending cylinder 15 to rotate synchronously. At this time, the centrifugal force generated by the rotation will cause the trigger member 34 to overcome the elastic force of the return spring 33 and move to the outside of the top box 32. When the trigger member 34 moves to the outside of the top box 32, the contact bevel at the bottom of the trigger member 34 will contact the trigger magnet 37 and push the trigger magnet 37 to overcome the elastic force of the return spring 38 and move into the top cavity 58 until the trigger magnet 37 contacts the first platform 35. When the trigger magnet 37 moves into the top cavity 58, The distance between the trigger magnet 37 and the top magnetic block 40 will become closer. Under the action of the repulsive magnetic force, the top tube 42 will overcome the elastic force of the pressure spring 43 and move downward. When the top tube 42 moves downward, the multiple liquid inlets 41 will be exposed outside the blocking ring 39. Correspondingly, the red water-soluble dye in the top cavity 58 will enter the top tube 42 through the multiple liquid inlets 41, and finally enter the bottom tube 44 through the top tube 42, and finally be transported out of the inner box 31 by the bottom tube 44. After the red fluorescent dye enters the mixing cylinder 15, it will be transported by the rotating rod 17 and enter the valve 5 through the liquid outlet 55 until it reaches the mixing cylinder 15. Fill the valve 5. When the valve 5 is filled with red fluorescent dye, the operator can retract the hydraulic rod 7 again and press the pressure plate 23 down again in the valve 5 to press the red fluorescent dye to simulate a high water pressure environment. During the test, the operator can observe at the bottom of the observation port 57 to see if there is any red fluorescent dye exposed from the bottom of the valve 5 when the valve 5 is closed. If there is red fluorescent dye exposed, it means that the valve 5 is not sealed enough when it is closed and the internal leakage test is unqualified. If there is no red fluorescent dye exposed, it means that the valve 5 is qualified, so the valve 5 can be tested for internal leakage.

[0027] When the internal leakage test of valve 5 is completed, the operator can open valve 5 by hand wheel to put valve 5 in flow-open state. When valve 5 is in flow-allowable state, the red fluorescent dye in valve 5 will flow out of valve 5 under normal state. If the dye in valve 5 fails to flow out of valve 5 when valve 5 is in the open state, it means that there is an abnormality in the valve plate in valve 5, so that the liquid cannot flow normally, and the valve 5 will also be judged as unqualified.

[0028] Example 2: Please refer to Figure 1 - Figure 3 This embodiment further explains the first embodiment. The liquid injection mechanism includes a top tube 42 slidably set on the blocking ring 39. The top tube 42 is hollow and has multiple liquid inlets 41. A top magnetic block 40 is set at the top of the top tube 42. The magnetic poles of the top magnetic block 40 are the same as the magnetic poles of the trigger magnet 37. The top end of the top tube 42 is sealed and the bottom end is open.

[0029] A bottom tube 44 is provided inside the bottom cavity 59, and one end of the top tube 42 away from the top magnetic block 40 slides through the inside of the bottom tube 44, a pressure spring 43 is provided on the outer wall of the top tube 42, and the other end of the pressure spring 43 is fixedly connected to the outer wall of the bottom tube 44, and a plurality of contact protrusions 45 are provided at the end of the top tube 42, and a plurality of side tubes 46 are connected to the end of the bottom tube 44, and a blocking box 47 is provided inside the plurality of side tubes 46, and an inner plate 48 is slidably provided inside the blocking box 47, and a flow port 50 is opened on the inner plate 48, and a return spring 49 is provided on the blocking box 47, and one end of the return spring 49 away from the blocking box 47 is fixedly connected to the outer wall of the bottom tube 44, and the end of the inner plate 48 slides through the inside of the bottom tube 44 and is located directly below the corresponding contact protrusion 45.

[0030] The top cavity 58 and the bottom cavity 59 are both connected with a liquid inlet pipe 51 and a rear pipe 52 , and the ends of the liquid inlet pipe 51 and the rear pipe 52 are respectively connected to the interior of the lower chamber 54 and the upper chamber 53 .

[0031] A rotating rod 17 is provided at the bottom of the blending cylinder 15, a fixing rod 22 is fixedly connected to the outer wall of the mounting plate 11, a fixing tube 16 is provided at the end of the fixing rod 22, a pressure plate 23 is provided at the end of the fixing tube 16, the rotating rod 17 rotates through the interior of the fixing tube 16 and the pressure plate 23, a liquid outlet 55 is provided at the end of the rotating rod 17, a plurality of nozzles 56 are provided on the liquid outlet 55, and a liquid full self-stop valve is provided inside the liquid outlet 55.

[0032] In this embodiment, when the valve 5 is in a normal state, after the red liquid is discharged into the liquid storage box 2 through the observation port 57, the operator can close the solenoid valve in the observation port 57 to stop the flow of liquid through the observation port 57. At this time, the drive motor 12 can be started at medium power. As in the above principle, when the top rod 13 is synchronized with the transmission rod through the gear 14 and rotates at a relatively fast speed, it will drive the blending cylinder 15 to rotate synchronously. Correspondingly, the multiple inner boxes 31 located inside the blending cylinder 15 will also rotate synchronously with the blending cylinder 15. At this time, under the action of a large centrifugal force, the trigger member 34 will overcome the reset spring 3 3, the elastic force of the top box 32 moves further to the outside of the top box 32 until the second platform 36 contacts the trigger magnet 37. When the second platform 36 contacts the trigger magnet 37, the trigger magnet 37 is pushed further into the top cavity 58. At this time, the distance between the trigger magnet 37 and the top magnetic block 40 becomes closer. At this time, under the action of the repulsive magnetic force, the top tube 42 is pushed to move further into the bottom tube 44. When the top tube 42 moves a large distance into the bottom tube 44, not only the liquid inlet 41 will be exposed outside the blocking ring 39, but also the contact protrusion 45 at the bottom of the top tube 42 will contact the end of the inner plate 48 through its inclined surface. The inner plate 48 is pushed toward the outside of the bottom tube 44, so that the flow port 50 originally located outside the blocking box 47 enters the blocking box 47. When the flow port 50 enters the blocking box 47 and the plurality of liquid inlets 41 are exposed outside the blocking ring 39, the red fluorescent dye in the top cavity 58 enters the top tube 42 through the liquid inlet 41, and the yellow fluorescent dye in the bottom cavity 59 enters the bottom tube 44 through the side tube 46. When the top tube 42 transports the red fluorescent dye to the bottom tube 44 and mixes with the yellow fluorescent dye, it becomes orange fluorescent dye, and the orange fluorescent dye enters the rotating rod 1. 7, and finally transported to the valve 5 through the liquid outlet 55. When the valve 5 is filled with the mixed orange fluorescent dye, the operator can retract the hydraulic rod 7 again, and let the pressure plate 23 press down again in the valve 5 to press the orange fluorescent dye, so as to simulate a high water pressure environment. During the test, the operator can observe the outside of the valve 5 to see if there is orange fluorescent dye seeping out from the outer wall of the valve 5. If the orange fluorescent dye leaks out, it means that the valve body of the valve 5 is damaged and the leakage test fails. The fluorescent dye can be observed more intuitively as a valve test liquid to avoid missed detection.

[0033] When the valve 5 is tested and inspected, the operator can open the solenoid valve in the observation port 57 to discharge the orange fluorescent dye in the valve 5 into the liquid storage box 2. When the orange fluorescent dye in the valve 5 is completely discharged, the operator can start the drive motor 12 at high power to allow the top rod 13 to drive the blending cylinder 15 to rotate rapidly. When the blending cylinder 15 rotates rapidly, the trigger member 34 will be thrown to the outside of the top box 32 under the action of a large centrifugal force. When the trigger member 34 is located outside the top box 32, it will no longer contact the trigger magnet 37, so the trigger magnet 37 will be in its original position. At this time, the inner box 31 will not transport the fluorescent dye into the blending cylinder 15. When the trigger member 34 is located outside the top box 32, it will be away from the bottom of the magnetic plate 29. At this time, the repulsive magnetic force between the two disappears. At this time, under the elastic force of the pressing spring 30, the slide The tube 27 will move toward the outside of the push rod 13, allowing the liquid port 28 to break away from the contact with the blocking plug 26. When the liquid port 28 breaks away from the blocking plug 26, the water transported in the push rod 13 will enter the slide tube 27 through the liquid port 28. Part of the water entering the slide tube 27 will be transported to the telescopic nozzle 24 through the telescopic tube 25, and sprayed to the outside of the blending cylinder 15 by the telescopic nozzle 24, so as to perform drip cleaning on the equipment under the entire blending cylinder 15. Part of the water will enter the rotating rod 17 and enter the valve 5 through the transportation of the rotating rod 17 to clean the fluorescent dye in the valve 5. When cleaning the fluorescent dye in the valve 5, the valve 5 can be closed in turn to allow clean water to clean the valve plate and other mechanisms in the valve 5, and then the valve 5 can be opened to allow water to flow from the inlet end of the valve 5 to the outlet end to rinse the inner wall of the valve 5.

[0034] It should be noted that a liquid-full self-stop valve is provided inside the liquid outlet 55. When the valve 5 is full of water or the fluorescent dye, the liquid infusion into the valve 5 will be stopped. When the liquid outlet 55 rotates with the rotating rod 17 to deliver water to clean the valve 5, since the nozzle 56 is in close contact with the pressure plate 23, the nozzle 56 will throw part of the water onto the outer wall of the pressure plate 23 to rinse the outer wall of the pressure plate 23.

[0035] It should be noted that when the top rod 13 drives the blending cylinder 15 to rotate, it will also drive the multiple through holes 21 to rotate. When the multiple through holes 21 are rotated to coincide with the open ends of the infusion tube 18, the red and yellow fluorescent dyes in the left liquid tank 8 and the right liquid tank 10 will enter the lower chamber 54 and the upper chamber 53 through the through holes 21 for replenishment, respectively. The red and yellow fluorescent dyes that have entered the lower chamber 54 and the upper chamber 53 will enter the top chamber 58 and the bottom chamber 59 through the liquid inlet tube 51 and the rear tube 52, respectively.

[0036] It should be noted that the fluorescent dyes are all water-soluble fluorescent dyes, which contain more hydrophilic groups in their molecular structure and can be quickly dissolved in water. After being used in the detection of valve 5, they are easily washed away by water, and the dyes will not cause damage to the material of valve 5. Because they are mainly used for marking and detection, the design purpose is to facilitate cleaning without leaving harmful residues. Moreover, fluorescent dyes are usually relatively stable in chemical properties and will not cause chemical reactions inside valve 5. Even if there is a small amount of residue, it will not interfere with the normal operation of valve 5.

[0037] It should be noted that when the inner box 31 rotates rapidly with the blending cylinder 15 and the trigger member 34 moves toward the outside of the top box 32, the first platform 35 and the second platform 36 will both make brief contact with the trigger magnet 37. However, since the return spring 38 is a weak spring with a slow expansion and contraction speed, when the first platform 35 and the second platform 36 make brief contact with the trigger magnet 37, the slower expansion and contraction speed of the return spring 38 will slow down the speed at which the trigger magnet 37 moves downward into the return spring 38. When the trigger magnet 37 does not have time to move downward and generate magnetic force with the top magnetic block 40, the first platform 35 and the second platform 36 will quickly break away from contact with the trigger magnet 37. Therefore, only when the first platform 35 and the second platform 36 are in contact with the trigger magnet 37 for a long time, the inner box 31 will transport the fluorescent dye outward.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve test bench, comprising a support (1), wherein a liquid storage box (2) is arranged on the support (1), and a suction pipe (3) is arranged in communication with the interior of the liquid storage box (2), characterized in that: A bottom plate (4) is fixedly connected to the outer wall of the bracket (1), an observation port (57) is provided inside the bottom plate (4), a solenoid valve is arranged inside the observation port (57), a valve (5) is arranged on the observation port (57), and a hand wheel is arranged on the side wall of the valve (5). Electric rods are arranged on both sides of the bracket (1), a clamping plate (6) is arranged on the electric rod, and the clamping plate (6) contacts the outer wall of the valve (5). A detection mechanism is arranged on the bracket (1), and the detection mechanism comprises a hydraulic rod (7) fixedly connected to the bracket (1), a mounting plate (11) is arranged at the end of the hydraulic rod (7), a push rod (13) is rotatably connected to the mounting plate (11), a driving motor (12) is fixedly connected to the outer wall of the mounting plate (11), a transmission rod is arranged at the output end of the driving motor (12), and gears (14) are fixedly connected to the outer walls of the transmission rod and the push rod (13), and the two gears (14) are arranged in meshing.

2. A valve test bench according to claim 1, characterized in that: The mounting plate (11) is provided with a left liquid tank (8), a water storage tank (9) and a right liquid tank (10), respectively. The left liquid tank (8), the water storage tank (9) and the right liquid tank (10) are provided with external pipe insertion openings inside. A liquid storage cylinder (20) is fixedly connected to the outer wall of the push rod (13). A partition plate is provided inside the liquid storage cylinder (20). The partition plate divides the interior of the liquid storage cylinder (20) into an upper chamber (53) and a lower chamber (54). The upper and lower sides of the cylinder (20) are slidably sleeved with a covering ring (19), and the interiors of the two covering rings (19) are connected to an infusion tube (18). The ends of the two infusion tubes (18) away from the covering rings (19) are respectively connected to the interiors of the left liquid box (8) and the right liquid box (10). The upper and lower sides of the liquid storage cylinder (20) are provided with a plurality of through holes (21), and the plurality of through holes (21) are respectively connected to the interiors of the upper chamber (53) and the lower chamber (54).

3. A valve test bench according to claim 2, characterized in that: A blending cylinder (15) is arranged at the bottom of the liquid storage cylinder (20), the end of the push rod (13) penetrates into the interior of the blending cylinder (15), a sliding tube (27) is slidably arranged through one end of the push rod (13) located inside the blending cylinder (15), a liquid passage opening (28) is opened at one end of the sliding tube (27) located inside the push rod (13), a blocking plug (26) is fixedly connected to the interior of the push rod (13), the blocking plug (26) blocks the liquid passage opening (28), a pressing spring (30) is arranged on the sliding tube (27), and a plurality of magnetic plates (29) are fixedly connected to the outer wall of the sliding tube (27).

4. A valve test bench according to claim 3, characterized in that: The interior of the sliding pipe (27) is connected to a plurality of telescopic pipes (25), and ends of the plurality of telescopic pipes (25) are each provided with a telescopic nozzle (24), and the telescopic nozzle (24) penetrates to the outside of the blending cylinder (15).

5. A valve test bench according to claim 3, characterized in that: A plurality of inner boxes (31) are arranged inside the blending cylinder (15), and a top box (32) is arranged on the top of each of the plurality of inner boxes (31). A sliding groove is provided inside the top box (32), and a trigger member (34) is slidably connected to the inner side wall of the sliding groove. The top of the trigger member (34) has magnetic force, and the magnetic pole of the top of the trigger member (34) is the same as the magnetic pole of the magnetic plate (29). A return spring (33) is arranged on the trigger member (34), and one end of the return spring (33) away from the trigger member (34) is fixedly connected to the inner side wall of the sliding groove. A first platform (35) and a second platform (36) are arranged on the bottom of the trigger member (34). A trigger magnet (37) is slidably arranged inside the top box (32), and a return pressure spring (38) is arranged on the trigger magnet (37), and one end of the return pressure spring (38) away from the trigger magnet (37) is fixedly connected to the inner side wall of the top box (32).

6. A valve test bench according to claim 5, characterized in that: A top chamber (58) and a bottom chamber (59) are provided inside the inner box (31); a blocking ring (39) is fixedly connected to the inside of the top chamber (58); and a liquid injection mechanism is provided inside the blocking ring (39).

7. A valve test bench according to claim 6, characterized in that: The liquid injection mechanism comprises a top tube (42) slidably arranged on a blocking ring (39); the top tube (42) is hollow and has a plurality of liquid inlets (41) formed thereon; a top magnetic block (40) is arranged at the top end of the top tube (42); the magnetic poles of the top magnetic block (40) are the same as those of the trigger magnet (37); the top end of the top tube (42) is sealed and the bottom end is open.

8. A valve test bench according to claim 7, characterized in that: A bottom tube (44) is arranged inside the bottom cavity (59); one end of the top tube (42) away from the top magnetic block (40) slides through the inside of the bottom tube (44); a pressure spring (43) is arranged on the outer wall of the top tube (42); the other end of the pressure spring (43) is fixedly connected to the outer wall of the bottom tube (44); a plurality of contact protrusions (45) are arranged at the end of the top tube (42); a plurality of side tubes (46) are arranged at the end of the bottom tube (44); and the plurality of side tubes (46) are connected to the top tube (42). A blocking box (47) is provided inside the bottom tube (46), an inner plate (48) is slidably provided inside the blocking box (47), a flow opening (50) is provided on the inner plate (48), a return spring (49) is provided on the blocking box (47), one end of the return spring (49) away from the blocking box (47) is fixedly connected to the outer wall of the bottom tube (44), and the end of the inner plate (48) slides through the inside of the bottom tube (44) and is located directly below the corresponding contact protrusion (45).

9. A valve test bench according to claim 6, characterized in that: The top chamber (58) and the bottom chamber (59) are both connected to each other by a liquid inlet pipe (51) and a rear pipe (52), and the ends of the liquid inlet pipe (51) and the rear pipe (52) are respectively connected to the interior of the lower chamber (54) and the interior of the upper chamber (53).

10. A valve test bench according to claim 2, characterized in that: The bottom of the blending cylinder (15) is connected to a rotating rod (17), the outer side wall of the mounting plate (11) is fixedly connected to a fixing rod (22), the end of the fixing rod (22) is provided with a fixing pipe (16), the end of the fixing pipe (16) is provided with a pressure plate (23), the rotating rod (17) rotates through the inside of the fixing pipe (16) and the pressure plate (23), the end of the rotating rod (17) is provided with a liquid outlet (55), the liquid outlet (55) is connected to a plurality of nozzles (56), and the inside of the liquid outlet (55) is provided with a liquid full automatic stop valve.

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