Valve sealing performance detection device and detection method for pipeline valve processing

Abstract

The invention belongs to the technical field of valve leakproofness testing, particularly relates to a valve leakproofness detection device and method for pipeline valve processing, and aims to solve the problems that detection cannot be performed according to the opening and closing states of a valve clack, determination of an air leakage position is affected when water is turbid, and the air leakage position cannot be judged by naked eyes across the water surface in the prior art. According to the technical scheme, the valve sealing performance detection device for pipeline valve machining comprises a water storage tank, an L-shaped support is fixed to one side of the water storage tank, a multi-stage air cylinder fixedly penetrates through the L-shaped support, a partition plate is fixed in the water storage tank, and a detection bin and a water storage bin are formed in the water storage tank through the partition plate; when the valve is pushed into the detection bin to be detected, water in the water storage bin can be discharged into the detection bin, meanwhile, the water is filtered, it is guaranteed that the water is relatively clear, and the camera can accurately judge the air leakage position of the valve conveniently in the later sealing performance detection process; in addition, the lifting plate is matched with the air bag to drive a valve clack in the valve to rotate.

Description

Technical Field

[0001] The invention relates to the technical field of valve sealing test, and in particular to a valve sealing detection device and a detection method for pipeline valve processing. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. In the production and processing of valves, quality inspection is usually required to ensure the use effect, safety and reliability. Valve inspection usually includes sealing inspection and pressure resistance inspection.

[0003] There are still some deficiencies in the existing technology when testing the valve sealing performance: In the prior art, when testing the sealing performance of a valve, air is directly ventilated into the valve for testing, and the open and closed states of the valve disc cannot be tested separately, resulting in an incomplete test. During the test, the valve is placed in water to determine the location of the leak. When the water is turbid, it is difficult to accurately determine the location of the leak. The naked eye cannot accurately determine the location of the leak through the water surface, which can easily lead to misjudgment later.

[0004] In view of the above problems, the present invention document proposes a valve sealing detection device and a detection method for pipeline valve processing. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the existing valve sealing detection device and detection method for pipeline valve processing, that is, it is impossible to detect according to the open and closed states of the valve disc, the determination of the leakage position is affected when the water is turbid, and the naked eye cannot judge the leakage position through the water surface.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A valve sealing detection device for pipeline valve processing comprises a water storage tank, an L-shaped bracket is fixed on one side of the water storage tank, a multi-stage cylinder is fixedly passed through the L-shaped bracket, a partition is fixed in the water storage tank, a detection chamber and a water storage chamber are formed in the water storage tank through the partition, the detection chamber is used to detect the sealing of the valve, and the water storage chamber is used to store water after the detection is completed, and a sealing plate is sealed and slidably connected in the water storage chamber, and the sealing plate is used to discharge the water in the water storage chamber into the detection chamber; It also includes an upper pressing plate and a lower pressing plate, and the upper pressing plate is located above the lower pressing plate, and the upper pressing plate and the lower pressing plate cooperate to clamp the valve and ensure the sealing of the valve; It also includes a rubber wheel that is rotatably arranged on the top of the lower pressure plate, and the rubber wheel cooperates with the valve handle to drive the valve disc to rotate; A lifting plate is slidably arranged on one inner wall of the detection chamber, and two cameras are fixed on one side of the lifting plate for detecting the sealing of the valve; A detection structure, disposed in the detection chamber, for enabling a camera to detect an outer wall of the valve; The drainage structure is arranged at the bottom of the lower pressure plate and is used to discharge the water in the water storage tank into the detection tank; The conversion structure is arranged in the lower pressure plate and is used to drive the valve disc to rotate and detect the sealing performance of the valve when the valve disc is open or closed.

[0007] In a possible design, the detection structure includes a reciprocating screw that rotates and penetrates the partition, the top end of the reciprocating screw extends into the detection chamber and is threadedly connected to the lifting plate, a rotating shaft rotates and penetrates in the sealing plate, and the top end of the rotating shaft seals and penetrates the partition and extends into the detection chamber, a gear is fixed to the top end of the rotating shaft, the outer wall fixed sleeve of the lower pressure plate is provided with a gear ring, and the gear ring cooperates with the gear to drive the lower pressure plate to rotate, and the bottom of the partition is rotatably connected to two worm gears, one of which is fixedly sleeved on the outer wall of the reciprocating screw, and the other worm gear slides through a slide groove and a slider Sleeved on the outer wall of the rotating shaft, the bottom of the partition is rotatably connected to a worm through a base, and the worm is meshed with a worm wheel. A driving motor is fixed to one side of the water tank through a frame, and the output shaft of the driving motor is fixedly connected to one end of the worm through a coupling; the worm drives the rotating shaft and the reciprocating screw to rotate through the worm wheel, and the rotating shaft drives the lower pressure plate to rotate through the cooperation of the gear and the gear ring, and the reciprocating screw drives the camera downward through the lifting plate. The camera can detect the outer wall of the valve, thereby fully completing the sealing of the valve when the valve disc is closed and ensuring the accuracy of the detection.

[0008] In one possible design, the detection structure also includes an air pump fixed on one side of the L-shaped bracket, and a first air injection hose is fixed to the air outlet end of the air pump, and a pressure gauge is provided on the first air injection hose. The bottom end of the lower pressure plate is rotatably connected to a fixed column, and the bottom end of the fixed column seals and slides through the partition and is fixedly connected to the top of the sealing plate. An air injection channel is provided in the fixed column, and one end of the first air injection hose penetrates the sealing plate and is connected to the air injection channel, which is used to inject gas into the valve for sealing detection; the air pump injects gas into the air injection channel through the first air injection hose, and the gas enters the inside of the valve, and the camera detects the position where bubbles appear in the valve.

[0009] In a possible design, the drainage structure includes a plurality of fixed rods sliding on the bottom of the lower pressure plate, the bottom ends of the plurality of fixed rods all slide through the partition and are fixedly connected to the top of the sealing plate, a plurality of guide rods are longitudinally fixed in the water storage tank, and the sealing plate is slidably sleeved on the outer walls of the plurality of guide rods, the outer walls of the plurality of guide rods are sleeved with springs fixedly connected to the bottom of the sealing plate, and the bottom ends of the springs are fixedly connected to the bottom inner wall of the water storage tank, the bottom end of the output shaft of the multi-stage cylinder is rotatably connected to the top of the upper pressure plate, and the multi-stage cylinder drives the lower pressure plate and the valve downward through the upper pressure plate, and conversion boxes are fixed on both sides of the water storage tank, and the conversion box is provided with a Activated carbon, two guide pipes are fixed on both sides of the water tank, the two guide pipes on the same side are connected with the detection bin and the water storage bin respectively, and the ends of the two guide pipes on the same side close to each other are connected with the conversion box, and when the sealing plate moves downward, the water in the water storage bin is injected into the detection bin through the guide pipe and the conversion box; the output shaft of the multi-stage cylinder pushes the valve downward, and the valve drives the sealing plate downward through the fixed rod and the fixed column. During the downward movement of the sealing plate, the water in the water storage bin is injected into the detection bin through the conversion box and the guide pipe, and the activated carbon can filter the impurities in the water in the water storage bin, so that the water in the detection bin is clearer, ensuring that the later camera can clearly capture the valve leakage position.

[0010] In a possible design, the conversion structure includes an annular give-way groove arranged at the bottom of the lower pressure plate, a groove connected to the annular give-way groove is arranged in the lower pressure plate, the bottom end of the rubber wheel passes through the groove and extends into the annular give-way groove, an annular groove is arranged on the top of the partition, a second sealing ring is sealingly and slidingly connected in the annular groove, a rubber ring is fixed on the top of the second sealing ring, and the rubber ring cooperates with the rubber wheel to drive the rubber wheel to rotate, the annular give-way groove is used to give way to the rubber ring, an airbag is fixed on the top of the partition, and one side of the airbag is provided The air bag cooperates with the lifting plate, and the lifting plate is used to discharge the gas in the air bag into the annular groove; when the lifting plate moves down and squeezes the air bag, the gas in the air bag is injected into the annular groove through the air bag and pushes the second sealing ring and the rubber ring upward. The rubber ring touches the rubber wheel at this time. When the lower pressure plate rotates, the friction between the rubber wheel and the rubber ring drives the rubber wheel to rotate, and the friction between the rubber wheel and the valve handle drives the valve disc to rotate. At this time, the valve disc opens, and the sealing of the valve in the open state can be completed.

[0011] In a possible design, an upper sealing gasket is fixedly embedded in the bottom of the upper pressure plate, and a lower sealing gasket is fixedly embedded in the top of the lower pressure plate. A first sealing ring is fixed on the side where the lower sealing gasket and the upper sealing gasket are close to each other. The upper sealing gasket, the lower sealing gasket and the first sealing ring are used to increase the sealing between the upper pressure plate, the lower pressure plate and the valve.

[0012] In a possible design, an inner groove is provided on the outer wall of the rubber wheel to increase the contact area between the rubber wheel and the valve handle, thereby increasing the friction between the rubber wheel and the handle.

[0013] In a possible design, the output shaft of the multi-stage cylinder is fixedly connected with a rotating cylinder, the bottom of the rotating cylinder is rotatably connected to the top of the upper pressure plate, the upper pressure plate is provided with a cavity, the rotating cylinder and the cavity are connected by a through pipe, the outer wall of the upper pressure plate is fixed with a hollow disk, a plurality of pipes are fixed in the upper pressure plate, the cavity is connected with the hollow disk through the pipe, and is used to inject gas into the hollow disk, a plurality of nozzles are fixed at the bottom of the hollow disk, and are used to remove water droplets on the outer wall of the valve, a second gas injection hose is fixed to the outer wall of the first gas injection hose through a three-way valve, one end of the second gas injection hose is connected with the rotating cylinder, and is used to inject gas into the rotating cylinder; gas is injected into the rotating cylinder through the cooperation of the air pump and the second gas injection hose, and the gas is sprayed toward the valve through the cavity, the pipe, the hollow disk and the nozzle to remove water droplets on the surface of the valve, and then the lower pressure plate drives the valve to rotate, and the three-dimensional scanner continues to scan the three-dimensional data of the valve, and compares it with the previously scanned data to determine whether the valve is deformed during the sealing detection process, and further detect the quality of the valve.

[0014] In a possible design, a three-dimensional scanner is fixed to one side of the L-shaped bracket for scanning the three-dimensional data before and after the valve sealing test.

[0015] In the present application, a pipeline valve sealing detection method adopts the valve sealing detection device for pipeline valve processing, and specifically comprises the following steps: S1. Place the valve on the lower pressure plate, close the valve disc, and match the valve handle with the rubber wheel; the multi-stage cylinder drives the lower pressure plate and the upper pressure plate to clamp the valve; the driving motor drives the shaft to rotate through the worm and worm gear, thereby rotating the lower pressure plate and the valve, and the 3D scanner preliminarily scans the 3D data of the valve; S2. The multi-stage cylinder pushes the valve downward, and drives the sealing plate downward through the fixed rod and the fixed column, and the water in the water storage tank is filtered and injected into the detection tank to ensure the water quality is clear, so that the camera can clearly capture the valve leakage position; S3. When the lower pressure plate moves to the top of the partition, the air pump injects gas into the air injection channel, and the camera detects the position of the valve bubble; at the same time, the worm drives the shaft and the reciprocating screw to rotate, driving the valve and the camera to rotate and move downward, and comprehensively detects the valve sealing when the valve disc is closed to ensure accurate detection; S4, the lifting plate moves downward to squeeze the airbag, and the gas in the airbag is injected into the annular groove, pushing the second sealing ring and the rubber ring upward, so that the rubber ring contacts the rubber wheel; when the lower pressure plate rotates, the friction between the rubber wheel and the rubber ring drives the valve disc to rotate, open the valve disc, and complete the valve sealing test when the valve disc is open; S5. After the inspection is completed, the multi-stage cylinder contracts and the lower pressure plate moves upward under the action of the spring; the air pump injects gas into the transfer cylinder, and the gas is sprayed to the valve through the nozzle to remove water droplets; the lower pressure plate drives the valve to rotate, and the 3D scanner continues to scan and compare with the previous data to determine whether the valve is deformed and further detect the valve quality.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a plurality of fixing rods are slidably provided at the bottom of the lower pressure plate, and the bottom ends of the plurality of fixing rods are fixedly connected to the top of the sealing plate, conversion boxes are fixed on both sides of the water storage tank, activated carbon is arranged in the conversion box, and two guide pipes are fixed on both sides of the water storage tank, and the two guide pipes on the same side are respectively connected to the detection bin and the water storage bin, and the ends of the two guide pipes on the same side close to each other are both connected to the conversion box; the output shaft of the multi-stage cylinder pushes the valve downward, and the valve drives the sealing plate downward and injects the water in the water storage bin into the detection bin through the conversion box and the guide pipe, and the activated carbon can filter the impurities in the water in the water storage bin, so that the water in the detection bin is relatively clear, ensuring that the later camera can clearly shoot the valve leakage position; In the present invention, the top end of the reciprocating screw extends into the detection chamber and is threadedly connected to the lifting plate, a rotating shaft is rotated and penetrated in the sealing plate, a gear is fixed on the top end of the rotating shaft, a gear ring is provided on the outer wall fixed sleeve of the lower pressure plate, one worm gear fixed sleeve is arranged on the outer wall of the reciprocating screw, and the other worm gear sliding sleeve is arranged on the outer wall of the rotating shaft, and the bottom of the partition is rotatably connected to a worm through a base; the worm drives the rotating shaft and the reciprocating screw to rotate through the worm gear, the rotating shaft drives the lower pressure plate to rotate, and the reciprocating screw drives the camera to move up and down through the lifting plate, and the camera can detect the outer wall of the valve, so as to fully complete the sealing of the valve when the valve disc is closed and ensure the accuracy of the detection; In the present invention, a groove connected with the annular give-way groove is provided in the lower pressure plate, an annular groove is provided on the top of the partition plate, a second sealing ring is sealingly and slidably connected in the annular groove, a rubber ring is fixed on the top of the second sealing ring, an airbag is fixed on the top of the partition plate, and the airbag is connected with the annular groove through an air guide pipe; the lifting plate moves downward to inject the gas in the airbag into the annular groove and push the second sealing ring and the rubber ring upward, when the lower pressure plate rotates, the friction between the rubber wheel and the rubber ring drives the rubber wheel to rotate, and the friction between the rubber wheel and the valve handle drives the valve disc to rotate, at which time the valve disc opens, and the sealing of the valve in the valve disc open state can be completed at this time; In the present invention, when the valve is pushed into the inspection chamber for inspection, the water in the water storage chamber can be discharged into the inspection chamber, and the water can be filtered at the same time to ensure that the water quality is relatively clear, so that during the subsequent sealing inspection, the camera can accurately determine the leakage position of the valve. In addition, the cooperation of the lifting plate and the airbag can drive the valve disc inside the valve to rotate, so that the sealing of the valve in the open and closed states of the valve disc can be detected in turn, and the sealing inspection is more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 3 This is a schematic diagram of the front cross-sectional structure of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 4 A schematic diagram of the three-dimensional structure of the lower pressing plate, the upper pressing plate and the partition plate of the valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 5 A schematic diagram of a three-dimensional exploded structure of a lower pressure plate, a partition plate and a sealing plate of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 6 A schematic diagram of a three-dimensional exploded structure of an upper pressure plate, an upper sealing gasket, a lower sealing gasket and a lower pressure plate of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 7 A schematic diagram of a three-dimensional cross-sectional structure of a lower pressure plate of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Figure 8 A schematic diagram of the three-dimensional structure of the lower pressing plate, the rotating shaft and the reciprocating screw of the valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Fig. 9 A schematic diagram of a three-dimensional cross-sectional structure of a partition plate and a sealing plate of a valve sealing detection device for pipeline valve processing provided in Example 1 of the present invention; Fig.10 for Fig. 9 The enlarged structural diagram at A in the middle; Fig.11 This is a schematic side view of the cross-sectional structure of the upper pressure plate of the valve sealing detection device for pipeline valve processing provided in Example 2 of the present invention.

[0018] In the figure: 1, water storage tank; 2, partition; 3, detection chamber; 4, water storage chamber; 5, L-shaped bracket; 6, multi-stage cylinder; 7, upper pressure plate; 8, upper sealing gasket; 9, lower pressure plate; 10, fixing rod; 11, fixing column; 12, sealing plate; 13, guide rod; 14, spring; 15, lower sealing gasket; 16, first sealing ring; 17, air pump; 18, first air injection hose; 19, air pressure gauge; 20, air injection channel; 21, rotating shaft; 22, gear; 23, gear ring; 24, reciprocating screw Rod; 25, lifting plate; 26, camera; 27, worm gear; 28, worm; 29, drive motor; 30, annular clearance groove; 31, groove; 32, rubber wheel; 33, annular groove; 34, second sealing ring; 35, rubber ring; 36, air guide tube; 37, air bag; 38, conversion box; 39, guide tube; 40, activated carbon; 41, transfer cylinder; 42, hollow disk; 43, cavity; 44, nozzle; 45, second air injection hose; 46, pipeline; 47, three-dimensional scanner. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1: Reference Figure 1 - Fig.10 A detection device is used in the field of valve detection. The overall structure of the device includes a water tank 1, an L-shaped bracket 5 is fixed on one side of the water tank 1, and a multi-stage cylinder 6 is fixed and penetrated in the L-shaped bracket 5. A partition 2 is fixed in the water tank 1, and the water tank 1 is divided into a detection chamber 3 and a water storage chamber 4 by the partition 2. The detection chamber 3 is used to detect the sealing of the valve, and the water storage chamber 4 is used to store water after the detection. A sealing plate 12 is sealed and slidably connected in the water storage chamber 4, and the sealing plate 12 is used to discharge the water in the water storage chamber 4 into the detection chamber 3. It also includes an upper pressing plate 7 and a lower pressing plate 9, and the upper pressing plate 7 is located above the lower pressing plate 9. The two cooperate to clamp the valve and ensure the sealing of the valve. A rubber wheel 32 is rotatably provided on the top of the lower pressing plate 9, and the rubber wheel 32 cooperates with the valve handle to drive the valve disc to rotate. A lifting plate 25 is slidably provided on the inner wall of one side of the detection chamber 3, and two cameras 26 are fixed on one side of the lifting plate 25 to detect the sealing of the valve.

[0021] Place the valve to be tested on the lower pressure plate 9 and ensure that the valve disc in the valve is in a closed state. At this time, the first sealing ring 16 can just extend into the valve, and the valve handle cooperates with the rubber wheel 32. The output shaft of the multi-stage cylinder 6 drives the upper pressure plate 7 to move downward, and cooperates with the lower pressure plate 9 to clamp the valve. The cooperation between the upper sealing gasket 8 and the lower sealing gasket 15 is used to increase the sealing performance of the valve.

[0022] Reference Figure 2 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 and Fig.10 The detection structure includes a reciprocating screw 24 that rotates and penetrates the partition 2. The top of the reciprocating screw 24 extends into the detection chamber 3 and is threadedly connected to the lifting plate 25. A rotating shaft 21 rotates and penetrates the sealing plate 12. The top of the rotating shaft 21 seals and penetrates the partition 2 and extends into the detection chamber 3. A gear 22 is fixed on the top. A gear ring 23 is fixedly sleeved on the outer wall of the lower pressing plate 9. The gear ring 23 cooperates with the gear 22 to drive the lower pressing plate 9 to rotate. Two worm gears 27 are rotatably connected to the bottom of the partition 2, one of which is fixedly sleeved on the outer wall of the reciprocating screw 24, and the other worm gear 27 is slidably sleeved on the outer wall of the rotating shaft 21 through a slide groove and a slider. A worm 28 is rotatably connected to the bottom of the partition 2 through a base, and the worm 28 is meshed with the worm wheel 27. A driving motor 29 is fixed to one side of the water storage tank 1 through a frame, and the output shaft of the driving motor 29 is fixedly connected to one end of the worm 28 through a coupling.

[0023] The worm 28 drives the rotating shaft 21 and the reciprocating screw 24 to rotate through the worm gear 27. The rotating shaft 21 drives the lower pressing plate 9 and the valve to rotate, and the reciprocating screw 24 drives the camera 26 to move downward through the lifting plate 25. The camera 26 detects the outer wall of the valve, fully completes the sealing test of the valve when the valve disc is closed, and ensures the accuracy of the test.

[0024] Reference Figure 2 and Figure 7 The detection structure also includes an air pump 17 fixed to one side of the L-shaped bracket 5, and a first air injection hose 18 is fixed to the air outlet of the air pump 17, and a pressure gauge 19 is provided on the first air injection hose 18. The bottom end of the lower pressure plate 9 is rotatably connected to a fixed column 11, and the bottom end of the fixed column 11 is sealed and slidable through the partition 2 and is fixedly connected to the top of the sealing plate 12. An air injection channel 20 is provided in the fixed column 11, and one end of the first air injection hose 18 penetrates the sealing plate 12 and is connected to the air injection channel 20, which is used to inject gas into the valve for sealing detection.

[0025] When the lower pressure plate 9 moves down to the top of the partition 2, the air pump 17 injects gas into the air injection channel 20 through the first air injection hose 18, and the gas enters the inside of the valve. The camera 26 detects the position of the bubble in the valve to determine the sealing of the valve.

[0026] Reference Figure 2 - Figure 5The drainage structure includes a plurality of fixed rods 10 slidably arranged at the bottom of the lower pressing plate 9, and the bottom end of the fixed rod 10 slides through the partition 2 and is fixedly connected to the top of the sealing plate 12. A plurality of guide rods 13 are longitudinally fixed in the water storage tank 4, and the sealing plate 12 is slidably sleeved on the outer wall of the plurality of guide rods 13. The outer wall of the guide rod 13 is sleeved with a spring 14 fixedly connected to the bottom of the sealing plate 12, and the bottom end of the spring 14 is fixedly connected to the bottom inner wall of the water storage tank 4. The bottom end of the output shaft of the multi-stage cylinder 6 is rotatably connected to the top of the upper pressing plate 7, and the multi-stage cylinder 6 drives the lower pressing plate 9 and the valve to move downward through the upper pressing plate 7. A conversion box 38 is fixed on both sides of the water storage tank 1, and an activated carbon 40 for filtering water is arranged in the conversion box 38. Two guide pipes 39 are fixed on both sides of the water storage tank 1, and the two guide pipes 39 located on the same side are respectively connected to the detection tank 3 and the water storage tank 4, and the ends close to each other are connected to the conversion box 38. When the sealing plate 12 moves downward, the water in the water storage tank 4 is injected into the detection tank 3 through the guide pipe 39 and the conversion box 38.

[0027] The output shaft of the multi-stage cylinder 6 pushes the valve downward, and the valve drives the sealing plate 12 downward through the fixing rod 10 and the fixing column 11, squeezing the spring 14. During the downward movement of the sealing plate 12, the water in the water storage tank 4 is injected into the detection tank 3 through the conversion box 38 and the guide pipe 39. The activated carbon 40 filters the impurities in the water in the water storage tank 4, making the water in the detection tank 3 clearer.

[0028] Reference Figure 4 , Fig. 9 and Fig.10 The conversion structure includes an annular clearance groove 30 arranged at the bottom of the lower pressing plate 9, and a groove 31 connected to the annular clearance groove 30 is arranged in the lower pressing plate 9. The bottom end of the rubber wheel 32 passes through the groove 31 and extends into the annular clearance groove 30 so that the rubber ring 35 can cooperate with the rubber wheel 32. An annular groove 33 is arranged at the top of the partition 2, and a second sealing ring 34 is sealingly and slidably connected in the annular groove 33. A rubber ring 35 is fixed on the top of the second sealing ring 34, and the rubber ring 35 cooperates with the rubber wheel 32 to drive the rubber wheel 32 to rotate. The annular clearance groove 30 is used to make way for the rubber ring 35 to ensure that it can smoothly contact with the rubber wheel 32 and drive it to rotate. An air bag 37 is fixed on the top of the partition 2, and an air guide tube 36 is arranged on one side of the air bag 37, and one end of the air guide tube 36 extends into the annular groove 33.

[0029] When it is necessary to detect the valve sealing performance when the valve disc is open, the lifting plate 25 moves downward and squeezes the airbag 37. The gas in the airbag 37 is injected into the annular groove 33 through the air guide tube 36, and pushes the second sealing ring 34 and the rubber ring 35 upward. The rubber ring 35 touches the rubber wheel 32. When the lower pressing plate 9 rotates, the friction between the rubber wheel 32 and the rubber ring 35 drives the rubber wheel 32 to rotate. The friction between the rubber wheel 32 and the valve handle drives the valve disc to rotate. At this time, the valve disc is open, and the valve sealing performance detection when the valve disc is open is completed.

[0030] Reference Figure 6 and Figure 7 The upper sealing gasket 8 is fixedly embedded at the bottom of the upper pressing plate 7, and the lower sealing gasket 15 is fixedly embedded at the top of the lower pressing plate 9. A first sealing ring 16 is fixed to the side where the lower sealing gasket 15 and the upper sealing gasket 8 are close to each other.

[0031] The upper sealing gasket 8, the lower sealing gasket 15 and the first sealing ring 16 act together between the upper pressing plate 7, the lower pressing plate 9 and the valve to increase the sealing performance.

[0032] Reference Figure 6 An inner groove is provided on the outer wall of the rubber wheel 32 to increase the contact area between the rubber wheel 32 and the valve handle.

[0033] By increasing the contact area, the friction between the rubber wheel 32 and the valve handle can be increased, thereby making it easier to drive the valve to rotate.

[0034] Example 2: Reference Fig.11 , an improvement on Example 1: the output shaft of the multi-stage cylinder 6 is fixedly connected to the rotating cylinder 41, and the bottom of the rotating cylinder 41 is rotatably connected to the top of the upper pressure plate 7. A cavity 43 is set in the upper pressure plate 7, and the rotating cylinder 41 is connected to the cavity 43 through a through pipe. A hollow disk 42 is fixed on the outer wall of the upper pressure plate 7, and a plurality of pipes 46 are fixed in the upper pressure plate 7. The cavity 43 is connected to the hollow disk 42 through the pipe 46, which is used to inject gas into the hollow disk 42. A plurality of nozzles 44 are fixed at the bottom of the hollow disk 42 to remove water droplets on the outer wall of the valve. A second gas injection hose 45 is fixed to the outer wall of the first gas injection hose 18 through a three-way valve, and one end of the second gas injection hose 45 is connected to the rotating cylinder 41.

[0035] After the sealing test is completed, the output shaft of the multi-stage cylinder 6 shrinks, and the lower pressure plate 9 moves upward under the elastic force of the spring 14. At this time, the upper pressure plate 7 and the lower pressure plate 9 can initially clamp the valve. The air pump 17 injects gas into the rotating cylinder 41 through the second air injection hose 45, and the gas is sprayed toward the valve through the cavity 43, the pipeline 46, the hollow disk 42 and the nozzle 44 to remove the water droplets on the surface of the valve.

[0036] refer to Fig.11, a three-dimensional scanner 47 is fixed on one side of the L-shaped bracket 5.

[0037] The three-dimensional scanner 47 is used to scan the three-dimensional data before and after the valve sealing test so as to analyze and judge the deformation of the valve.

[0038] The pipeline valve sealing detection method adopts the valve sealing detection device for pipeline valve processing, and specifically comprises the following steps: S1. Place the valve on the lower pressure plate 9. At this time, the valve disc in the valve is in a closed state, and the first sealing ring 16 can just extend into the valve, and the valve handle cooperates with the rubber wheel 32. The output shaft of the multi-stage cylinder 6 drives the upper pressure plate 7 to move downward. At this time, the upper pressure plate 7 cooperates with the lower pressure plate 9 to initially complete the clamping of the valve. The cooperation of the upper sealing gasket 8 and the lower sealing gasket 15 is used to increase the sealing of the valve; then the driving motor 29 drives the worm 28 to rotate, and the worm 28 drives the rotating shaft 21 to rotate through the worm gear 27. The rotating shaft 21 drives the lower pressure plate 9 to rotate through the cooperation of the gear 22 and the gear ring 23. At this time, the three-dimensional scanner 47 initially scans the three-dimensional data of the valve before detection; S2, the output shaft of the multi-stage cylinder 6 pushes the valve downward, and the valve drives the sealing plate 12 downward through the fixing rod 10 and the fixing column 11, and the spring 14 is squeezed. During the downward movement of the sealing plate 12, the water in the water storage tank 4 is injected into the detection tank 3 through the conversion box 38 and the guide pipe 39, and the activated carbon 40 can filter the impurities in the water in the water storage tank 4, so that the water in the detection tank 3 is relatively clear, ensuring that the camera 26 can clearly shoot the valve leakage position in the later stage; S3. When the lower pressure plate 9 moves down to the top of the partition 2, the air pump 17 injects gas into the gas injection channel 20 through the first gas injection hose 18, and the gas enters the inside of the valve. The camera 26 detects the position where the bubble appears in the valve; in addition, the worm 28 drives the rotating shaft 21 and the reciprocating screw 24 to rotate through the worm gear 27, and the rotating shaft 21 drives the lower pressure plate 9 and the valve to rotate. The reciprocating screw 24 drives the camera 26 to move down through the lifting plate 25. The camera 26 can detect the outer wall of the valve, so as to fully complete the sealing of the valve in the closed state of the valve disc and ensure the accuracy of the detection; S4. When the lifting plate 25 moves downward and squeezes the airbag 37, the gas in the airbag 37 is injected into the annular groove 33 through the air guide tube 36 and pushes the second sealing ring 34 and the rubber ring 35 upward. The rubber ring 35 touches the rubber wheel 32 at this time. When the lower pressing plate 9 rotates, the friction between the rubber wheel 32 and the rubber ring 35 drives the rubber wheel 32 to rotate. The friction between the rubber wheel 32 and the valve handle drives the valve disc to rotate. At this time, the valve disc is opened, and the sealing of the valve in the open state can be completed. S5. After the sealing test is completed, the output shaft of the multi-stage cylinder 6 contracts, and the lower pressure plate 9 moves upward under the elastic force of the spring 14. At this time, the upper pressure plate 7 and the lower pressure plate 9 can initially clamp the valve, and then the gas is injected into the transfer cylinder 41 through the cooperation of the air pump 17 and the second gas injection hose 45, and the gas is sprayed to the valve through the cavity 43, the pipeline 46, the hollow disk 42 and the nozzle 44 to remove the water droplets on the surface of the valve. Then the lower pressure plate 9 drives the valve to rotate, and the three-dimensional scanner 47 continues to scan the three-dimensional data of the valve and compares it with the previously scanned data to determine whether the valve is deformed during the sealing test, and further detect the quality of the valve.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of the air pump 17, drive motor 29 and barometer 19 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A valve sealing detection device for pipeline valve processing, characterized in that: The invention comprises a water storage tank (1), an L-shaped bracket (5) is fixed on one side of the water storage tank (1), a multi-stage cylinder (6) is fixedly passed through the L-shaped bracket (5), a partition (2) is fixed in the water storage tank (1), a detection chamber (3) and a water storage chamber (4) are formed in the water storage tank (1) through the partition (2), the detection chamber (3) is used to detect the sealing performance of the valve, and the water storage chamber (4) is used to store water after the detection is completed, and a sealing plate (12) is sealingly and slidably connected in the water storage chamber (4), and the sealing plate (12) is used to discharge the water in the water storage chamber (4) into the detection chamber (3); It also includes an upper pressing plate (7) and a lower pressing plate (9), wherein the upper pressing plate (7) is located above the lower pressing plate (9), and the upper pressing plate (7) and the lower pressing plate (9) cooperate to clamp the valve and ensure the sealing of the valve; It also includes a rubber wheel (32) rotatably arranged on the top of the lower pressure plate (9), and the rubber wheel (32) cooperates with the valve handle to drive the valve disc to rotate; A lifting plate (25) is slidably disposed on an inner wall of one side of the detection chamber (3), and two cameras (26) are fixed on one side of the lifting plate (25) for detecting the sealing performance of the valve; A detection structure, disposed in the detection chamber (3), used to enable the camera (26) to detect the outer wall of the valve; A drainage structure, arranged at the bottom of the lower pressure plate (9), and used for draining water in the water storage chamber (4) into the detection chamber (3); The conversion structure is arranged in the lower pressure plate (9) and is used to drive the valve disc to rotate and detect the sealing performance of the valve when the valve disc is in the open or closed state.

2. The valve sealing detection device for pipeline valve processing according to claim 1 is characterized in that: The detection structure comprises a reciprocating screw (24) that rotates and passes through the partition (2), the top end of the reciprocating screw (24) extends into the detection chamber (3) and is threadedly connected to the lifting plate (25), a rotating shaft (21) is rotatably passed through the sealing plate (12), and the top end of the rotating shaft (21) seals and passes through the partition (2) and extends into the detection chamber (3), a gear (22) is fixed to the top end of the rotating shaft (21), and a toothed ring (23) is fixedly provided on the outer wall of the lower pressure plate (9), and the toothed ring (23) cooperates with the gear (22) to drive the lower pressure plate (9) to rotate. The bottom of the partition (2) is rotatably connected to two worm gears (27), one of which is fixedly sleeved on the outer wall of the reciprocating screw (24), and the other worm gear (27) is slidably sleeved on the outer wall of the rotating shaft (21) through a sliding groove and a sliding block. The bottom of the partition (2) is rotatably connected to a worm (28) through a base, and the worm (28) is meshed with the worm gear (27). A driving motor (29) is fixedly connected to one side of the water storage tank (1) through a frame, and an output shaft of the driving motor (29) is fixedly connected to one end of the worm (28) through a coupling.

3. The valve sealing detection device for pipeline valve processing according to claim 2 is characterized in that: The detection structure also includes an air pump (17) fixed to one side of the L-shaped bracket (5), a first air injection hose (18) being fixed to the air outlet end of the air pump (17), a pressure gauge (19) being provided on the first air injection hose (18), the bottom end of the lower pressure plate (9) being rotatably connected to a fixed column (11), the bottom end of the fixed column (11) sealingly slides through the partition (2) and is fixedly connected to the top of the sealing plate (12), an air injection channel (20) is provided in the fixed column (11), one end of the first air injection hose (18) penetrates the sealing plate (12) and is connected to the air injection channel (20), and is used to inject gas into the valve for sealing detection.

4. The valve sealing detection device for pipeline valve processing according to claim 3 is characterized in that: The drainage structure comprises a plurality of fixed rods (10) sliding on the bottom of the lower pressure plate (9), the bottom ends of the plurality of fixed rods (10) all slide through the partition plate (2) and are fixedly connected to the top of the sealing plate (12), a plurality of guide rods (13) are longitudinally fixed in the water storage tank (4), and the sealing plate (12) is slidably sleeved on the outer walls of the plurality of guide rods (13), the outer walls of the plurality of guide rods (13) are sleeved with springs (14) fixedly connected to the bottom of the sealing plate (12), and the bottom ends of the springs (14) are fixedly connected to the bottom inner wall of the water storage tank (4), the bottom end of the output shaft of the multi-stage cylinder (6) is rotatably connected to the top of the upper pressure plate (7), and the multi-stage cylinder (6) is rotatably connected to the top of the upper pressure plate (7). The cylinder (6) drives the lower pressure plate (9) and the valve to move downward through the upper pressure plate (7). Conversion boxes (38) are fixed on both sides of the water storage tank (1). Activated carbon (40) for filtering water is arranged in the conversion box (38). Two guide pipes (39) are fixed on both sides of the water storage tank (1). The two guide pipes (39) located on the same side are respectively connected to the detection chamber (3) and the water storage chamber (4). The ends of the two guide pipes (39) located on the same side that are close to each other are connected to the conversion box (38). When the sealing plate (12) moves downward, the water in the water storage chamber (4) is injected into the detection chamber (3) through the guide pipe (39) and the conversion box (38).

5. The valve sealing detection device for pipeline valve processing according to claim 4 is characterized in that: The conversion structure comprises an annular clearance groove (30) arranged at the bottom of the lower pressure plate (9), a groove (31) connected to the annular clearance groove (30) is arranged in the lower pressure plate (9), the bottom end of the rubber wheel (32) passes through the groove (31) and extends into the annular clearance groove (30), an annular groove (33) is arranged on the top of the partition plate (2), a second sealing ring (34) is sealingly and slidably connected in the annular groove (33), and a rubber ring (35) is fixed on the top of the second sealing ring (34). The rubber ring (35) cooperates with the rubber wheel (32) to drive the rubber wheel (32) to rotate, and the annular make way groove (30) is used to make way for the rubber ring (35). An air bag (37) is fixed to the top of the partition plate (2), and an air guide tube (36) is provided on one side of the air bag (37), and one end of the air guide tube (36) extends into the annular groove (33). The air bag (37) cooperates with the lifting plate (25), and the lifting plate (25) is used to discharge the gas in the air bag (37) into the annular groove (33).

6. The valve sealing detection device for pipeline valve processing according to claim 5, characterized in that: An upper sealing gasket (8) is fixedly embedded in the bottom of the upper pressure plate (7), and a lower sealing gasket (15) is fixedly embedded in the top of the lower pressure plate (9). A first sealing ring (16) is fixed on the side where the lower sealing gasket (15) and the upper sealing gasket (8) are close to each other. The upper sealing gasket (8), the lower sealing gasket (15) and the first sealing ring (16) are used to increase the sealing performance between the upper pressure plate (7), the lower pressure plate (9) and the valve.

7. The valve sealing detection device for pipeline valve processing according to claim 6 is characterized in that: An inner groove is provided on the outer wall of the rubber wheel (32) for increasing the contact area between the rubber wheel (32) and the valve handle, thereby increasing the friction between the rubber wheel (32) and the handle.

8. The valve sealing detection device for pipeline valve processing according to claim 7, characterized in that: The output shaft of the multi-stage cylinder (6) is fixedly connected to a central rotating cylinder (41), the bottom of the central rotating cylinder (41) is rotatably connected to the top of the upper pressing plate (7), a cavity (43) is provided in the upper pressing plate (7), the central rotating cylinder (41) and the cavity (43) are connected via a through pipe, a hollow disk (42) is fixed to the outer wall of the upper pressing plate (7), a plurality of pipes (46) are fixed in the upper pressing plate (7), the cavity (43) is connected to the hollow disk (42) via the pipes (46), and is used to inject gas into the hollow disk (42), a plurality of nozzles (44) are fixed to the bottom of the hollow disk (42), and are used to remove water drops on the outer wall of the valve, a second gas injection hose (45) is fixed to the outer wall of the first gas injection hose (18) via a three-way valve, one end of the second gas injection hose (45) is connected to the central rotating cylinder (41), and is used to inject gas into the central rotating cylinder (41).

9. The valve sealing detection device for pipeline valve processing according to claim 8, characterized in that: A three-dimensional scanner (47) is fixed on one side of the L-shaped bracket (5) for scanning three-dimensional data before and after valve sealing detection.

10. A valve sealing detection method using the valve sealing detection device for pipeline valve processing according to claim 9, characterized in that: The following steps are involved: S1. Valve clamping and preliminary scanning: The valve is placed on the lower pressure plate (9), the valve disc is closed, and the valve handle cooperates with the rubber wheel (32); the multi-stage cylinder (6) drives the lower pressure plate (9) and the upper pressure plate (7) to cooperate to clamp the valve; the driving motor (29) drives the rotating shaft (21) to rotate through the worm (28) and the worm gear (27), thereby rotating the lower pressure plate (9) and the valve, and the three-dimensional scanner (47) preliminarily scans the three-dimensional data of the valve; S2, water quality filtering and clear photography: the multi-stage cylinder (6) pushes the valve downward, and drives the sealing plate (12) downward through the fixing rod (10) and the fixing column (11), and the water in the water storage tank (4) is filtered and then injected into the detection tank (3), so as to ensure the water quality is clear, so that the camera (26) can clearly photograph the valve leakage position; S3. Sealing test of the valve disc in the closed state: when the lower pressure plate (9) moves to the top of the partition (2), the air pump (17) injects gas into the air injection channel (20), and the camera (26) detects the position of the bubble in the valve; at the same time, the worm (28) drives the rotating shaft (21) and the reciprocating screw (24) to rotate, driving the valve and the camera (26) to rotate and move downward, so as to comprehensively test the sealing of the valve in the closed state of the valve disc; S4, sealing test of the valve disc in the open state: the lifting plate (25) moves downward to squeeze the airbag (37), and the gas in the airbag (37) is injected into the annular groove (33), pushing the second sealing ring (34) and the rubber ring (35) upward, so that the rubber ring (35) contacts the rubber wheel (32); when the lower pressure plate (9) rotates, the friction between the rubber wheel (32) and the rubber ring (35) drives the valve disc to rotate, opening the valve disc, and completing the valve sealing test in the valve disc open state; S5. Completion of detection and data processing: After the detection is completed, the multi-stage cylinder (6) contracts, and the lower pressure plate (9) moves upward under the action of the spring (14); the air pump (17) injects gas into the rotating cylinder (41), and the gas is sprayed toward the valve through the nozzle (44) to remove water droplets; the lower pressure plate (9) drives the valve to rotate, and the three-dimensional scanner (47) continues to scan and compares with the previous data to determine whether the valve is deformed.

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