A cut-off valve pressure resistance detection structure, detection device and detection method

Abstract

The present invention relates to the field of cut-off valve detection technology, and specifically to a cut-off valve pressure resistance detection structure, detection device and detection method, comprising: a processing table, and a support plate fixedly mounted on the processing table, a piston cylinder being fixed on the support plate, a vent hole being provided on a circumferential outer wall of the piston cylinder, and an air intake pipe being fixed on the piston cylinder; a lifting mechanism being arranged in the processing table, a pump air detection component being arranged in the piston cylinder, and an air supply pipe being connected to the pump air detection mechanism component; a pressure regulating pipe being rotatably mounted on the bottom of the piston cylinder, a sealing ring being fixed on the end of the pressure regulating pipe, a stroke adjustment component connected to the lifting mechanism being arranged on the support plate, and a pressure increasing control mechanism being arranged in the pressure regulating pipe; a conduction control component being arranged in the piston cylinder, a sealing disk being connected to the conduction control component, and a plurality of second conduction holes being equidistantly distributed on a circumference being provided on the sealing disk. The present application can pressurize the cut-off valve by gradually pumping air to ensure the accuracy of the cut-off valve detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of cut-off valve detection, and in particular to a cut-off valve pressure resistance detection structure, a detection device and a detection method. Background Art

[0002] The purpose of gas emergency shut-off valve testing is to ensure its safe, fast and reliable operation in the gas system, especially in emergency situations such as gas leakage and abnormal pressure, so as to cut off the gas supply in time and prevent accidents.

[0003] Valve pressure test refers to the detection and verification of the pressure that the valve is subjected to, in order to ensure its performance is safe and reliable. In industrial production, valves are widely used, and the pressure they are subjected to will also increase accordingly. Therefore, it is particularly important to test the pressure resistance of the valve.

[0004] The existing pressure resistance test is to pump gas into the cut-off valve through the testing equipment, so that the pressure on the valve is higher than the normal working pressure, and after maintaining the pressure for a period of time, the sealing of the valve is tested. However, when the existing testing equipment pumps gas, its pumping rate remains unchanged, which may cause the pumping amount to be too much or too little, resulting in inaccurate pressure resistance test results. Summary of the invention

[0005] The object of the present invention is to provide a cut-off valve pressure resistance detection structure, detection device and detection method to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A cut-off valve pressure resistance detection structure, comprising:

[0008] A processing table, and a support plate fixedly mounted on the processing table, a piston cylinder is fixed on the support plate, a vent hole is opened on the circumferential outer wall of the piston cylinder, and an air intake pipe is fixed on the piston cylinder;

[0009] Also includes:

[0010] A lifting mechanism is arranged in the processing table, a pump gas detection component connected to the lifting mechanism is arranged in the piston cylinder, an air supply pipe running through the piston cylinder is connected to the pump gas detection mechanism component, and the lifting mechanism can transport the gas in the piston cylinder to the air supply pipe through the pump gas detection component;

[0011] A pressure regulating tube is rotatably mounted at the bottom of the piston cylinder, a sealing ring is fixed to the end of the pressure regulating tube, a stroke adjustment component connected to the lifting mechanism is arranged on the support plate, a boost regulating mechanism connected to the stroke adjustment component is arranged in the pressure regulating tube, and the boost regulating mechanism can be actuated when the pressure in the pressure regulating tube changes, so as to adjust the movement stroke of the lifting mechanism through the stroke adjustment component;

[0012] A conduction control component is arranged in the piston cylinder and connected to the boost control mechanism. A sealing disk is connected to the conduction control component. The sealing disk is provided with a plurality of second conduction holes distributed equidistantly around the circumference. The conduction control component can adjust the conduction state of the second conduction holes through the sealing disk when the boost control mechanism moves.

[0013] As a further solution of the present invention: the lifting mechanism includes a transmission rod rotatably installed on the support plate, a rotating plate is fixed to the end of the transmission rod, a through groove is opened on the rotating plate, a sliding block is slidably installed in the through groove, a limiting column is fixed to the side wall of the sliding block, and a guide assembly connected to the limiting column is arranged in the processing table.

[0014] As a further solution of the present invention: the guide assembly includes guide columns fixedly installed in the processing table and symmetrically arranged, and guide sleeves are slidably installed on the guide columns. A connecting plate is fixed to the side wall of the guide sleeve, and a groove is formed on the connecting plate, and the groove is slidably engaged with the limit column.

[0015] As a further solution of the present invention: the pump air detection component includes a hollow rod slidably mounted on the air supply pipe and passing through the piston cylinder, a support column is fixed to the end of the hollow rod, the support column is fixedly connected to the connecting plate, a piston disk slidably sealed with the piston cylinder is fixed to one end of the hollow rod away from the support column, a plurality of first conducting holes equidistantly distributed around the circumference are provided on the piston disk, and an air supply hole is provided on the air supply pipe.

[0016] As a further solution of the present invention: the stroke adjustment assembly includes a screw rod rotatably mounted on the support plate, a threaded sleeve cooperating with the screw rod thread is movably mounted on the screw rod, a rotating ring is rotatably mounted on the threaded sleeve, and a connecting rod hinged to the sliding block is hinged on the rotating ring.

[0017] As a further solution of the present invention: the boost control mechanism includes a vertical groove and a spiral groove opened in the pressure regulating pipe, the ends of the vertical groove and the spiral groove are connected to each other, a sealing disk is installed in the pressure regulating pipe for sliding sealing, a limit block is fixed on the sealing disk and is slidably engaged with the vertical groove and the spiral groove, a first spring is sleeved on the air supply pipe and a driven component is arranged on the support plate.

[0018] As a further solution of the present invention: the driven assembly includes a first rotating rod rotatably mounted on the piston cylinder, a first belt connected to the voltage regulating pipe is sleeved on the first rotating rod, and a first bevel gear is fixed to the end of the first rotating rod;

[0019] It also includes a second rotating rod rotatably mounted on the support plate, a second bevel gear meshing with the first bevel gear is fixed to the end of the second rotating rod, and a second belt connected to the screw rod is sleeved on the second rotating rod.

[0020] As a further solution of the present invention: the conduction regulating assembly comprises a rotating sleeve rotatably mounted on the piston cylinder, a third belt connected to the first rotating rod is sleeved on the rotating sleeve, and a movable plate is fixed to the end of the rotating sleeve;

[0021] It also includes a supporting sleeve fixedly mounted on the movable plate and symmetrically arranged, a movable rod is slidably mounted in the supporting sleeve, the movable rod is fixedly connected to the sealing disk, a second spring is sleeved on the supporting sleeve and the movable rod, and two ends of the second spring are respectively in contact with the movable plate and the sealing disk.

[0022] A detection device comprises the cut-off valve pressure resistance detection structure.

[0023] A method for testing the pressure resistance of a cut-off valve comprises the following steps:

[0024] Step 1: Place the cut-off valve to be tested on the processing table, and connect the air supply pipe to the air inlet of the cut-off valve. Under the action of the boost control mechanism, the cut-off valve is isolated from the outside air;

[0025] Step 2: Under the action of the lifting mechanism, the air in the piston cylinder is transported to the air supply pipe through the pump air detection component, so that the pressure in the cut-off valve gradually increases;

[0026] Step 3: Under the action of pressure, the boost control mechanism is driven to move, thereby driving the stroke control component to move, so as to gradually reduce the stroke of the lifting mechanism. Under the action of the lifting mechanism, the pumping gas volume of the air delivery pipe is reduced through the pumping gas detection component;

[0027] Step 4: The boost control mechanism will also drive the conduction control component to move, and when the test pressure in the cut-off valve reaches the set value, the second conduction hole is controlled to be conductive through the blocking disk so that the air supply pipe no longer pumps air.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can pump gas into the cut-off valve and increase the pressure inside the cut-off valve to perform a pressure resistance test on the cut-off valve. When the air supply pipe is inserted into the air inlet of the cut-off valve, under the action of the lifting mechanism, the pump air detection component is driven to move, thereby transporting the gas in the piston cylinder to the cut-off valve through the air supply pipe. When the pressure in the cut-off valve reaches the required value, the air supply pipe no longer pumps gas. After maintaining the pressure state for a certain period of time, the sealing of the cut-off valve is tested to achieve the effect of testing the pressure resistance of the cut-off valve.

[0029] As the amount of pumped air gradually increases, the air pressure drives the boost control mechanism to move, thereby driving the stroke adjustment component to move, so as to gradually reduce the pumping rate of the air supply pipe through the lifting mechanism and the pump air detection component, thereby ensuring the accuracy of the pumped air and the accuracy of the shut-off valve detection.

[0030] When the pressure in the cut-off valve reaches the detection value, the sealing disk moves under the action of the conduction control mechanism to control the second conduction hole to move to a conduction position with the first conduction hole. At this time, the inside of the piston cylinder is mutually conductive, and when the piston disk moves, gas is no longer pumped into the cut-off valve, thereby preventing the problem of inaccurate cut-off valve detection results due to excessive pumping of gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a structural schematic diagram of an embodiment of a cut-off valve pressure resistance detection structure.

[0032] Figure 2 This is a schematic diagram of the structure inside a processing table in one embodiment of a cut-off valve pressure resistance detection structure.

[0033] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A in the middle. Figure 4 for Figure 2 Schematic diagram of the structure from another angle.

[0034] Figure 5 This is a schematic diagram of a partially half-section structure of an embodiment of a cut-off valve pressure resistance detection structure.

[0035] Figure 6 This is a schematic diagram of the connection relationship between the lifting mechanism, the pump gas detection component, and the partial conduction control mechanism in an embodiment of the cut-off valve pressure resistance detection structure.

[0036] Figure 7This is a schematic diagram of the exploded structure of part of the lifting mechanism and the stroke adjustment component in one embodiment of the cut-off valve pressure resistance detection structure.

[0037] Figure 8 This is a schematic diagram of the explosion structure of a partial conduction control mechanism and a piston disc in an embodiment of a cut-off valve pressure resistance detection structure.

[0038] Fig. 9 This is a schematic diagram of the structure of the air supply pipe and part of the boost control mechanism in one embodiment of the cut-off valve pressure resistance detection structure.

[0039] Fig.10 This is a schematic diagram of the explosion structure of part of the boost control mechanism in one embodiment of the cut-off valve pressure resistance detection structure.

[0040] Fig.11 for Fig.10 A magnified schematic diagram of the structure at point B in the middle.

[0041] In the figure: 1, processing table; 2, support plate; 3, piston cylinder; 301, vent hole; 4, air inlet pipe; 5, hollow rod; 6, piston plate; 601, first guide hole; 7, air supply pipe; 701, air supply hole; 8, support column; 9, guide column; 10, guide sleeve; 11, connecting plate; 1101, groove; 12, transmission rod; 13, rotating plate; 1301, through groove; 14, sliding block; 15, limit column; 16, screw rod; 17, threaded sleeve; 1701, rotating ring; 18, connecting rod ; 19. voltage regulating tube; 1901. vertical groove; 1902. spiral groove; 20. sealing ring; 21. sealing disk; 22. limit block; 23. first spring; 24. first belt; 25. first rotating rod; 26. first bevel gear; 27. second rotating rod; 28. second bevel gear; 29. ​​second belt; 30. third belt; 31. rotating sleeve; 32. movable plate; 33. supporting sleeve; 34. movable rod; 35. second spring; 36. sealing disk; 3601. second conducting hole. DETAILED DESCRIPTION

[0042] 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.

[0043] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0044] See also Figure 1 to Figure 11 In an embodiment of the present invention, a cut-off valve pressure resistance detection structure includes:

[0045] A processing table 1, and a support plate 2 fixedly mounted on the processing table 1, a piston cylinder 3 is fixed on the support plate 2, a vent hole 301 is opened on the circumferential outer wall of the piston cylinder 3, and an air intake pipe 4 is fixed on the piston cylinder 3;

[0046] Also includes:

[0047] See also Figure 1-Figure 7 , a lifting mechanism is arranged in the processing table 1, and the lifting mechanism includes a transmission rod 12 rotatably mounted on the support plate 2, a rotating plate 13 is fixed to the end of the transmission rod 12, a through groove 1301 is opened on the rotating plate 13, a sliding block 14 is slidably installed in the through groove 1301, and a limiting column 15 is fixed to the side wall of the sliding block 14, and a guide assembly connected to the limiting column 15 is arranged in the processing table 1, wherein the guide assembly includes a guide column 9 fixedly installed in the processing table 1 and symmetrically arranged, a guide sleeve 10 is slidably mounted on the guide column 9, a connecting plate 11 is fixed to the side wall of the guide sleeve 10, a groove 1101 is opened on the connecting plate 11, and the groove 1101 is slidably engaged with the limiting column 15.

[0048] In detail, when it is necessary to perform a pressure resistance test on the cut-off valve, the cut-off valve to be tested can be placed on the processing table 1 so that the air supply pipe 7 is inserted into the air inlet of the cut-off valve. At this time, the transmission rod 12 rotates and drives the rotating plate 13 to move, thereby driving the sliding block 14 to move through the through groove 1301. The sliding block 14 will also drive the limiting column 15 to move. Under the action of the limiting column 15 and the groove 1101, the connecting plate 11 moves, and the connecting plate 11 will drive the guide sleeve 10 to move along the length direction of the guide column 9. Since the guide sleeve 10 and the guide column 9 have a guiding function, it can be ensured that the connecting plate 11 will not be offset during movement. The connecting plate 11 will also drive the pump air detection assembly to move, so as to transport the gas in the piston cylinder 3 to the cut-off valve through the air supply pipe 7.

[0049] Preferably, before conducting a pressure test on the cut-off valve, the cut-off valve needs to be controlled to be in a blocked state. As gas is gradually added, the pressure the valve withstands is higher than the normal working pressure. When the pressure reaches the required test pressure and is maintained for a period of time, check the structure and sealing of the valve. If the valve has no deformation, damage or leakage, it means that the valve structure and sealing remain intact.

[0050] See also Figure 5 , Figure 6 , Figure 8 A pump air detection component connected to the lifting mechanism is provided in the piston cylinder 3, and an air supply pipe 7 penetrating the piston cylinder 3 is connected to the pump air detection mechanism component. The lifting mechanism can transport the gas in the piston cylinder 3 to the air supply pipe 7 through the pump air detection component. The pump air detection component includes a hollow rod 5 slidably mounted on the air supply pipe 7 and penetrating the piston cylinder 3, a support column 8 is fixed to the end of the hollow rod 5, and the support column 8 is fixedly connected to the connecting plate 11, and a piston disk 6 slidingly and sealingly connected to the piston cylinder 3 is fixed to the end of the hollow rod 5 away from the support column 8, and a plurality of first conducting holes 601 equidistantly distributed around the circumference are provided on the piston disk 6, and an air supply hole 701 is provided on the air supply pipe 7.

[0051] It should be noted that a one-way valve connected to the air inlet pipe 4 is installed on the piston cylinder 3, and a one-way valve is also installed in the air supply pipe 7. The piston disc 6 can divide the piston cylinder 3 into two spaces. Under the action of the vent hole 301, the space on the side facing the support column 8 is in a conductive state. Under the action of the one-way valve, the gas in the space on the side away from the support column 8 can only enter the piston cylinder 3 through the air inlet pipe 4 and be transported to the air supply pipe 7 through the air supply hole 701. When it is necessary to perform a pressure test on the cut-off valve, at this time, the transmission rod 12 rotates, so that the connecting plate 11 moves along the length direction of the guide column 9. The connecting plate 11 will also drive the hollow rod 5 to move through the support column 8, thereby driving the piston disc 6 to slide in the piston cylinder 3. At this time, the air pressure in the piston cylinder 3 is reduced, so that the outside air is sucked into the piston cylinder 3 through the air inlet pipe 4. When the piston disc 6 moves to the end of the stroke, the piston disc 6 moves toward the initial direction to transport the gas in the piston cylinder 3 to the air supply pipe 7 through the air supply hole 701, thereby increasing the pressure in the cut-off valve.

[0052] Preferably, in the initial state, under the action of the sealing disk 36, the first conducting hole 601 and the second conducting hole 3601 are in a separated state, so that the first conducting hole 601 is in a blocked state. Therefore, when the piston disk 6 moves, gas will continue to be pumped into the cut-off valve. When the pressure in the cut-off valve reaches the detection value, under the action of the conduction control mechanism, the sealing disk 36 moves to control the second conducting hole 3601 to move to a conducting position with the first conducting hole 601. At this time, the inside of the piston cylinder 3 is mutually conductive, and when the piston disk 6 moves, gas is no longer pumped into the cut-off valve, thereby preventing the problem of inaccurate detection results of the cut-off valve due to excessive pumping of gas.

[0053] See also Figure 1-Figure 7 , a pressure regulating tube 19 is rotatably mounted at the bottom of the piston cylinder 3, a sealing ring 20 is fixed to the end of the pressure regulating tube 19, a stroke adjustment assembly connected to the lifting mechanism is provided on the support plate 2, and the stroke adjustment assembly includes a screw rod 16 rotatably mounted on the support plate 2, a threaded sleeve 17 threadably mounted on the screw rod 16 and threadedly matched with the screw rod 16, a rotating ring 1701 is rotatably mounted on the threaded sleeve 17, and a connecting rod 18 hinged to the sliding block 14 is hinged on the rotating ring 1701.

[0054] Furthermore, a follower plate 37 rotatably connected to the second rotating rod 27 is fixed on the threaded sleeve 17. In the initial state, the pressure in the cut-off valve is relatively small. In order to speed up the detection efficiency, the gas rate pumped into the cut-off valve can be kept at a high state. In order to ensure that the pumping of gas can be stopped in time after the pressure in the cut-off valve reaches the required detection size, it is necessary to gradually reduce the pumping amount of gas. Therefore, in the initial state, the threaded sleeve 17 is located at the end of the stroke in the direction of the rotating plate 13, so that the sliding block 14 is controlled by the rotating ring 1701 and the connecting rod 18 to be located at the end of the stroke in the direction away from the transmission rod 12. At this time, the rotation radius of the limit column 15 is the largest, so that the stroke of the piston disc 6 per unit time is the largest. Therefore, the gas pumped to the cut-off valve The gas velocity inside is the fastest. As the pressure inside the shut-off valve increases, the boost control mechanism will be driven to move, thereby driving the screw rod 16 to rotate. Under the action of the screw rod 16, the threaded sleeve 17 is controlled to move, thereby driving the follower plate 37 to move along the length direction of the second rotating rod 27. The follower plate 37 and the second rotating rod 27 have a guiding function to ensure that the threaded sleeve 17 moves along the length direction of the screw rod 16 and will not rotate with the screw rod 16. The threaded sleeve 17 will also drive the connecting rod 18 to move through the rotating ring 1701, so as to drive the sliding block 14 to move along the length direction of the through groove 1301 and move toward the transmission rod 12. At this time, the rotation radius of the limit column 15 will be reduced, thereby reducing the speed of pumping to the shut-off valve.

[0055] Preferably, as the pumping rate decreases, the pressure in the shut-off valve can be adjusted more accurately. If a sensor is used to detect the pressure in the shut-off valve, the accuracy of the sensor may be interfered with when the gas is pumped, and the sensor cannot reduce the pumping rate in time, which may cause inaccurate pumping volume. This problem can be avoided through mechanical control.

[0056] See also Figure 1 , Figure 2 , Figure 4-Figure 6 , Figure 9-11 The pressure regulating tube 19 is provided with a boost regulating mechanism connected to the stroke regulating assembly, and the boost regulating mechanism can be actuated when the pressure in the pressure regulating tube 19 changes, so as to adjust the movement stroke of the lifting mechanism through the stroke regulating assembly, and the boost regulating mechanism includes a vertical groove 1901 and a spiral groove 1902 provided in the pressure regulating tube 19, and the ends of the vertical groove 1901 and the spiral groove 1902 are connected to each other, and a sealing disk 21 is installed in the pressure regulating tube 19 for sliding sealing, and a limit block 22 is fixed on the sealing disk 21 for sliding engagement with the vertical groove 1901 and the spiral groove 1902, and the air supply A first spring 23 abutting against the sealing disk 21 is sleeved on the tube 7, and a driven assembly is arranged on the support plate 2, wherein the driven assembly includes a first rotating rod 25 rotatably mounted on the piston cylinder 3, the first rotating rod 25 is sleeved with a first belt 24 connected to the pressure regulating tube 19, and a first bevel gear 26 is fixed to the end of the first rotating rod 25; it also includes a second rotating rod 27 rotatably mounted on the support plate 2, a second bevel gear 28 meshing with the first bevel gear 26 is fixed to the end of the second rotating rod 27, and a second belt 29 connected to the screw 16 is sleeved on the second rotating rod 27.

[0057] Furthermore, a certain gap is left between the sealing ring 20 and the air supply pipe 7. When the cut-off valve needs to be subjected to a pressure resistance test, the sealing ring 20 can be tightly fitted with the air inlet of the cut-off valve so that the cut-off valve is isolated from the outside air. In the initial state, the first spring 23 is in a compressed state, so that the sealing disk 21 is in a fit position with the sealing ring 20. Under the action of the sealing disk 21, the pressure regulating tube 19 is in a blocked state. At this time, the limit block 22 is located at the end of the stroke of the vertical groove 1901 away from the spiral groove 1902. As the air supply pipe 7 pumps air at the highest pumping rate, the pressure in the cut-off valve gradually increases, and the air pressure will act on the sealing disk 21. When the air pressure thrust on the sealing disk 21 is greater than the pressure of the first spring 23, the sealing disk is driven 21 moves toward the direction of the piston cylinder 3 and compresses the first spring 23, thereby driving the limit block 22 to slide along the trajectory of the vertical groove 1901. As the air pressure increases, when the limit block 22 breaks away from the vertical groove 1901 and enters the spiral groove 1902, it means that the pressure in the cut-off valve is about to reach the detection pressure. At this time, under the action of the limit block 22 and the spiral groove 1902, the pressure regulating tube 19 rotates to drive the first rotating rod 25 to rotate through the first belt 24. The first rotating rod 25 will also drive the first bevel gear 26 to move, thereby driving the second rotating rod 27 to rotate through the second bevel gear 28. The second rotating rod 27 will drive the screw 16 to rotate through the second belt 29 to adjust the stroke of the limit column 15, thereby gradually reducing the pump air volume.

[0058] Preferably, under the action of the vertical groove 1901 and the spiral groove 1902, a relatively fast pumping rate can be maintained in the early stage of pumping air to the cut-off valve. When the pressure of the cut-off valve reaches a certain value, the pumping volume can be gradually reduced, thereby ensuring the accuracy of the pumping air and ensuring the accuracy of the cut-off valve detection. Since the size of the sealing ring 20 is relatively large, it can be adapted to cut-off valves of different sizes, thereby increasing the scope of application of the device.

[0059] See also Figure 5 , Figure 6 , Figure 8, a conduction and regulation component is arranged in the piston cylinder 3 and connected to the boost regulation mechanism, a blocking disk 36 is connected to the conduction and regulation component, and a plurality of second conduction holes 3601 equidistantly distributed on the blocking disk 36 are opened on the conduction and regulation component can adjust the conduction state of the second conduction holes 3601 through the blocking disk 36 when the boost regulation mechanism moves, the conduction and regulation component includes a rotating sleeve 31 rotatably mounted on the piston cylinder 3, a third belt 30 connected to the first rotating rod 25 is sleeved on the rotating sleeve 31, and a movable plate 32 is fixed to the end of the rotating sleeve 31; it also includes a supporting sleeve 33 fixedly mounted on the movable plate 32 and symmetrically arranged, a movable rod 34 is slidably mounted in the supporting sleeve 33, and the movable rod 34 is fixedly connected to the blocking disk 36, and a second spring 35 is sleeved on the support sleeve 33 and the movable rod 34, and the two ends of the second spring 35 are respectively abutted against the movable plate 32 and the blocking disk 36.

[0060] To elaborate, in order to prevent excessive gas from being pumped into the cut-off valve, causing the pressure in the cut-off valve to exceed the detection value, it is necessary to stop pumping gas when the pressure in the cut-off valve reaches the detection value. In the initial state, the first conducting hole 601 and the second conducting hole 3601 are in a separated state, and the second spring 35 is in a compressed state, so that the movable rod 34 is located at the end of the stroke away from the supporting sleeve 33, so as to block the first conducting hole 601 through the blocking disk 36. At this time, the piston disk 6 separates the piston cylinder 3 into two independent spaces. Under the action of the lifting mechanism, the piston disk 6 can be controlled to reciprocate to pump the gas in the piston cylinder 3 into the cut-off valve through the air supply pipe 7. The pumping gas rate is maintained at the maximum state. As the air pressure in the cut-off valve gradually increases, the limit block 22 will enter the screw The rotating groove 1902 causes the pressure regulating tube 19 to rotate, so as to drive the first rotating rod 25 to rotate through the first belt 24. The first rotating rod 25 will also drive the rotating sleeve 31 to rotate through the third belt 30, thereby driving the movable plate 32 to move. The movable plate 32 will also drive the sealing plate 36 to move through the supporting sleeve 33 and the movable rod 34, so as to drive the second conducting hole 3601 to move. When the pressure in the cut-off valve reaches the required value, the second conducting hole 3601 just moves to the connection position with the first conducting hole 601, so that the two spaces separated by the piston disk 6 are connected to each other, and the gas can freely enter and exit the piston cylinder 3 through the intake pipe 4 and the vent 301, so that the gas is no longer transported to the cut-off valve through the air supply pipe 7, ensuring that the pumping gas is stopped after the pressure in the cut-off valve reaches the detection value.

[0061] A detection device comprises the cut-off valve pressure resistance detection structure.

[0062] A method for testing the pressure resistance of a cut-off valve comprises the following steps:

[0063] Step 1: Place the cut-off valve to be tested on the processing table 1, and connect the air supply pipe 7 to the air inlet of the cut-off valve. Under the action of the boost control mechanism, the cut-off valve is isolated from the outside air;

[0064] Step 2: Under the action of the lifting mechanism, the air in the piston cylinder 3 is transported to the air supply pipe 7 through the pump air detection component, so that the pressure in the cut-off valve gradually increases;

[0065] Step 3: Under the action of pressure, the boost control mechanism is driven to move, thereby driving the stroke control component to move, so as to gradually reduce the stroke of the lifting mechanism. Under the action of the lifting mechanism, the pumping gas volume of the air delivery pipe 7 is reduced through the pumping gas detection component;

[0066] Step 4: The boost control mechanism will also drive the conduction control component to move, and when the test pressure in the cut-off valve reaches the set value, the second conduction hole 3601 is controlled to be conductive through the blocking disk 36, so that the air supply pipe 7 no longer pumps air.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cut-off valve pressure resistance detection structure, comprising: A processing table (1), and a support plate (2) fixedly mounted on the processing table (1), a piston cylinder (3) fixed on the support plate (2), a vent hole (301) opened on the circumferential outer wall of the piston cylinder (3), and an air intake pipe (4) fixed on the piston cylinder (3); the method further comprises: a lifting mechanism arranged in the processing table (1), a pump gas detection component connected to the lifting mechanism arranged in the piston cylinder (3), an air supply pipe (7) passing through the piston cylinder (3) connected to the pump gas detection mechanism component, and the lifting mechanism can transport the gas in the piston cylinder (3) to the air supply pipe (7) through the pump gas detection component; and a pressure regulating pipe (19) rotatably mounted on the bottom of the piston cylinder (3). A sealing ring (20) is fixed to the end of the pressure regulating tube (19); a stroke adjustment component connected to the lifting mechanism is arranged on the support plate (2); a boost control mechanism connected to the stroke adjustment component is arranged in the pressure regulating tube (19); the boost control mechanism can be actuated when the pressure in the pressure regulating tube (19) changes, so as to adjust the movement stroke of the lifting mechanism through the stroke adjustment component; a conduction control component is arranged in the piston cylinder (3) and connected to the boost control mechanism; a blocking disk (36) is connected to the conduction control component; a plurality of second conduction holes (3601) equidistantly distributed on a circumference are provided on the blocking disk (36); the conduction control component can be operated through the boost control mechanism when the boost control mechanism moves. The blocking disk (36) adjusts the conduction state of the second conduction hole (3601); the lifting mechanism comprises a transmission rod (12) rotatably mounted on the support plate (2); a rotating plate (13) is fixed to the end of the transmission rod (12); a through groove (1301) is provided on the rotating plate (13); a sliding block (14) is slidably mounted in the through groove (1301); a limiting column (15) is fixed to the side wall of the sliding block (14); a guide assembly connected to the limiting column (15) is arranged in the processing table (1); the guide assembly comprises a guide column (9) fixedly mounted in the processing table (1) and symmetrically arranged; a guide sleeve (10) is slidably mounted on the guide column (9); the guide sleeve (10) 0) A connecting plate (11) is fixed to the side wall, and a groove (1101) is provided on the connecting plate (11), and the groove (1101) is slidably engaged with the limit column (15); the pump gas detection component comprises a hollow rod (5) slidably mounted on the air supply pipe (7) and penetrating the piston cylinder (3), a support column (8) is fixed to the end of the hollow rod (5), and the support column (8) is fixedly connected to the connecting plate (11), and a piston disk (6) is fixed to the end of the hollow rod (5) away from the support column (8) and is slidably and sealingly connected to the piston cylinder (3), and a plurality of first conducting holes (601) are provided on the piston disk (6) and are equidistantly distributed on a circumference, and an air supply hole (701) is provided on the air supply pipe (7);The stroke adjustment assembly comprises a screw (16) rotatably mounted on the support plate (2); a threaded sleeve (17) threadably mounted on the screw (16) and threadably matched with the screw (16); a rotating ring (1701) rotatably mounted on the threaded sleeve (17); a connecting rod (18) hingedly connected to the sliding block (14) is hingedly connected to the rotating ring (1701); the boost control mechanism comprises a vertical groove (1901) and a spiral groove (1902) provided in the pressure regulating pipe (19); the vertical groove (1901) and the spiral groove (1902) are ) are connected to each other, a sealing disk (21) is installed in the pressure regulating tube (19) in a sliding seal, a limit block (22) is fixed on the sealing disk (21) and is slidably engaged with the vertical groove (1901) and the spiral groove (1902), a first spring (23) is sleeved on the air supply tube (7) and is in contact with the sealing disk (21), and a driven component is arranged on the support plate (2); the driven component comprises a first rotating rod (25) rotatably installed on the piston cylinder (3), the first rotating rod (25) is sleeved with a spring connected to the pressure regulating tube (19) The first rotating rod (25) is provided with a first belt (24) for rotating the piston cylinder (3), and a first bevel gear (26) is fixed at the end of the first rotating rod (25); the second rotating rod (27) is also provided with a second bevel gear (28) meshing with the first bevel gear (26), and the second rotating rod (27) is provided with a second belt (29) connected to the screw rod (16); the conduction regulating component comprises a rotating sleeve (31) rotatably mounted on the piston cylinder (3), and the rotating sleeve (31) is provided with a second bevel gear (28) meshing with the first bevel gear (26). A third belt (30) connected to the rotating rod (25), a movable plate (32) being fixed at the end of the rotating sleeve (31); and further comprising a supporting sleeve (33) fixedly mounted on the movable plate (32) and symmetrically arranged, a movable rod (34) being slidably mounted in the supporting sleeve (33), the movable rod (34) being fixedly connected to the blocking disk (36), a second spring (35) being sleeved on the supporting sleeve (33) and the movable rod (34), and two ends of the second spring (35) being respectively in contact with the movable plate (32) and the blocking disk (36). ; 2. A detection device, comprising the cut-off valve pressure resistance detection structure according to claim 1.

3. A method for testing the pressure resistance of a cut-off valve, using the testing device as claimed in claim 2, characterized in that: The following steps are involved: Step 1: Place the shut-off valve to be tested on the processing table (1), and connect the air supply pipe (7) to the air inlet of the shut-off valve. Under the action of the boost control mechanism, the shut-off valve is isolated from the outside air. Step 2: Under the action of the lifting mechanism, the air in the piston cylinder (3) is transported to the air supply pipe (7) through the pump air detection component, so that the pressure in the shut-off valve gradually increases. Step 3: Under the action of the pressure, the boost control mechanism is driven to move, thereby driving the stroke control component to move, so as to gradually reduce the stroke of the lifting mechanism. Under the action of the lifting mechanism, the pump air detection component is used to reduce the pumping amount of the air supply pipe (7); Step 4: The boost control mechanism will also drive the conduction control component to move, and when the test pressure in the shut-off valve reaches the set value, the second conduction hole (3601) is controlled to be conductive through the blocking disk (36), so that the air supply pipe (7) no longer pumps air.

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