Valve inner leakage quantitative detection system

Abstract

A quantitative detection system for internal leakage of a valve comprises a pressure supply device and a test bed, the test bed comprises a base and a valve mounting seat mounted on the base, the valve mounting seat comprises a first supporting piece and a second supporting piece which are fixedly mounted on the base, and a butt joint pipe is mounted on the first supporting piece; a butt joint ring is installed at the end, facing the second supporting piece, of the butt joint pipe, a metering container is arranged at the other end of the butt joint pipe, a push rod device is installed on the second supporting piece, a piston rod of the push rod device is a hollow rod, a check ring is installed at the end, facing the butt joint ring, of the piston rod, and the piston rod is sleeved with the sealing ring and abuts against the check ring. And the other end of the first hydraulic hose is connected with the pressure supply device. Through the above structure, the system can carry out inner leakage detection on a ball valve, a butterfly valve and a gate valve, and the to-be-detected valve is convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to a valve internal leakage quantitative detection system. Background Art

[0002] Valves used in important places in hydropower stations need to be tested for internal leakage before they are put into use. At present, during the test, the joint with the flange needs to be connected to the valve through bolts, and the joint is connected to the hydraulic hose. During the test, the valve is closed and pressure is applied to the hydraulic hose through the pump station to test the internal leakage of the valve. Since the joint and the valve are connected by bolts, the bolts need to be repeatedly installed and removed before and after the test, and the test efficiency is low.

[0003] In addition, Chinese patent document CN209166741U, published (announced) date: 2019.07.26, discloses a valve detection system and a valve detection test bench. Although it can be used for valve detection, it only detects emergency shut-off valves for vehicles, and cannot conveniently detect ball valves, butterfly valves and gate valves used in hydropower stations. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology, to provide a valve internal leakage quantitative detection system, which can be used for internal leakage detection of ball valves, butterfly valves and gate valves, and the valves to be detected are easy to install and disassemble.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a quantitative detection system for valve internal leakage, including a pressure supply device and a test bench, the test bench including a base and a valve mounting seat installed on the base, the valve mounting seat including a first support member and a second support member fixedly installed on the base, a docking tube is installed on the first support member, a docking ring is installed at one end of the docking tube facing the second support member, a metering container is arranged at the other end of the docking tube, a push rod device is installed on the second support member, the piston rod of the push rod device is a hollow rod, a retaining ring is installed at one end of the piston rod facing the docking ring, a sealing ring is sleeved on the piston rod and abuts against the retaining ring, the sealing ring is aligned with the docking ring, an external thread is arranged on the other end of the piston rod, one end of the first hydraulic hose is connected to the external thread on the piston rod, and the other end is connected to the pressure supply device, and a lifting member is respectively installed on the opposite sides of the first support member and the second support member.

[0006] A connecting rod is provided between the first supporting member and the second supporting member.

[0007] The first support member is provided with a first mounting hole, and the butt-joint pipe is mounted in the first mounting hole.

[0008] A semicircular hole is arranged on the top of the first support member, a semi-ring is installed on the top of the first support member through bolts, and the first installation hole is formed by the first support member and the semi-ring.

[0009] The second supporting member is provided with a second mounting hole, and the push rod device is mounted in the second mounting hole or on a side of the second supporting member away from the first supporting member.

[0010] A plurality of valve mounting seats are installed on the base of the test bench, the butt joints between adjacent valve mounting seats are connected to the piston rod via a second hydraulic hose, and the metering container is arranged below the butt joint of the last valve mounting seat.

[0011] A baffle is arranged at the edge of the base.

[0012] The test bench is provided with multiple, the infusion pipe of the liquid outlet of the pressure supply device is connected to the distribution pipe, the distribution pipe is provided with multiple branch pipes, and the branch pipes are connected to the piston rod on the first valve mounting seat on the test bench through the first hydraulic hose.

[0013] The pressure supply device includes a pressure test pump and a pressure regulating valve. The outlet of the pressure test pump is installed with an infusion tube, and the pressure regulating valve is installed on the infusion tube. A main valve and a pressure gauge are installed in sequence on the infusion tube at the downstream end of the pressure regulating valve. A branch pipe is installed at the downstream end of the pressure gauge, and the branch pipe is connected to the piston rod on the first valve mounting seat on the test bench through a first hydraulic hose.

[0014] A flow meter is installed on the branch pipe.

[0015] The utility model has the following beneficial effects:

[0016] 1. The pressure supply device of the utility model is used to provide pressure to the test bench. The pressure supply device can be a hydraulic station or a water pump. The first support is used to install the butt joint pipe, and the second support is used to install the push rod device. When in use, the piston rod of the push rod device is retracted, and the valve to be tested is placed on the supporting member between the first support and the second support. Then the piston rod of the push rod device is extended, and the sealing ring is against the interface on one side of the valve, and the butt joint ring is against the interface on the other side of the valve, thereby sealing and fixing the valve. The device can be used for internal leakage detection of ball valves, butterfly valves and gate valves, and the valve to be tested is easy to install and disassemble.

[0017] 2. A plurality of valve mounting seats are installed on the base of the test bench of the utility model, so that ball valves, butterfly valves and gate valves of the same nominal diameter can be tested simultaneously on one test bench.

[0018] 3. The utility model has multiple test benches, so that valves with different nominal diameters can be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the pipeline structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the main structure of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the valve mounting seat of the utility model.

[0023] Figure 4 for Figure 3 Schematic diagram of the AA section structure, the butt tube and butt ring are not shown in the figure.

[0024] Figure 5 for Figure 3 Schematic diagram of the BB cross-section structure.

[0025] Figure 6 It is a schematic diagram of the butt-jointed pipe structure of the utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the push rod device of the utility model.

[0027] In the figure:

[0028] Pressure supply device 100, pressure test pump 101, infusion pipe 102, pressure regulating valve 103, main valve 104, pressure gauge 105, distribution pipe 106, branch pipe 107, flow meter 108, first hydraulic hose 109;

[0029] Test bench 200, base 210, baffle 211, valve mounting seat 220, first support member 221, second support member 222, connecting rod 223, butt pipe 224, butt ring 2241, push rod device 225, piston rod 2251, external thread 2252, retaining ring 2253, sealing ring 2254, lifting member 226, first mounting hole 227, half ring 228, second mounting hole 229, second hydraulic hose 230, metering container 240;

[0030] Valve 300. DETAILED DESCRIPTION

[0031] See also Figure 1-7A quantitative detection system for internal leakage of a valve includes a pressure supply device 100 and a test bench 200. The test bench 200 includes a base 210 and a valve mounting seat 220 mounted on the base 210. The valve mounting seat 220 includes a first support member 221 and a second support member 222 fixedly mounted on the base 210. A butt joint pipe 224 is mounted on the first support member 221. A butt joint ring 2241 is mounted on the butt joint pipe 224 at one end facing the second support member 222. A metering container 240 is arranged at the other end of the butt joint pipe 224. A push rod device 225 is mounted on the second support member 222. The piston rod 2251 of the push rod device 225 is a hollow rod, a retaining ring 2253 is installed at one end of the piston rod 2251 facing the docking ring 2241, a sealing ring 2254 is sleeved on the piston rod 2251 and abuts against the retaining ring 2253, the sealing ring 2254 is aligned with the docking ring 2241, an external thread 2252 is arranged at the other end of the piston rod 2251, one end of the first hydraulic hose 109 is connected to the external thread 2252 on the piston rod 2251, and the other end is connected to the pressure supply device 100, and the first support member 221 and the second support member 222 are respectively installed with a lifting member 226 on the opposite side. Through the above structure, the system can perform internal leakage detection on ball valves, butterfly valves and gate valves, and the valves to be detected are easy to install and disassemble.

[0032] See also Figure 1 The pressure supply device 100 is used to provide pressure to the test bench 200. The pressure supply device 100 can be a hydraulic station or a water pump. The first support member 221 is used to install the butt joint 224, and the second support member 222 is used to install the push rod device 225. In a preferred solution, the butt joint 224 and the piston rod 2251 of the push rod device 225 are coaxial.

[0033] The butt ring 2241 installed at the end of the butt pipe 224 is used to abut against one of the pipe end faces of the valve 300 to achieve sealing. For details, see Figure 6 The docking ring 2241 is an annular plate, one side of the docking ring 2241 is welded to the docking tube 224, and the other side is provided with a rubber sealing pad.

[0034] See also Figure 7 The push rod device 225 uses a hydraulic cylinder or a gas cylinder. If a hydraulic cylinder is used, a hydraulic station needs to be configured. The hydraulic station is connected to the hydraulic cylinder through a hydraulic pipeline, and the extension and contraction of the hydraulic cylinder piston rod is controlled by a solenoid valve. If a gas cylinder is used, the two interfaces on the gas cylinder are connected to the solenoid valve through an air pipe, and the solenoid valve is connected to the air source through the air pipe, and the extension and contraction of the gas cylinder piston rod is controlled by the solenoid valve. The retaining ring 2253 is sealed and welded on the piston rod 2251, and the sealing ring 2254 is a rubber ring, which is sleeved on the piston rod 2251.

[0035] See also Figure 4 , 5The supporting member 226 on the first supporting member 221 and the second supporting member 222 is an arc-shaped plate. When the valve 300 is placed on the supporting member 226, the flanges of the interfaces on both sides of the valve 300 are concentric with the sealing ring 2254 and the docking ring 2241 respectively.

[0036] When in use, the piston rod 2251 of the push rod device 225 is retracted, and the valve 300 to be tested is placed on the lifting member 226 between the first support member 221 and the second support member 222, and then the piston rod 2251 of the push rod device 225 is extended, the sealing ring 2254 is pressed against the interface on one side of the valve 300, and the docking ring 2241 is pressed against the interface on the other side of the valve 300, thereby sealing and fixing the valve. During the test, the valve 300 is closed, and the pressure supply device 100 provides pressure to the piston rod 2251 through the first hydraulic hose 109. The other end of the docking tube 224 is provided with a measuring container 240, and the amount of leaked liquid in the measuring container 240 is used to determine whether the valve has internal leakage.

[0037] Preferably, the pressure supply device 100 may adopt the liquid delivery system disclosed in CN209166741U.

[0038] Furthermore, a connecting rod 223 is provided between the first supporting member 221 and the second supporting member 222 to improve the structural strength of the valve mounting seat.

[0039] See also Figure 4 A first mounting hole 227 is provided on the first support member 221 , and the butt joint pipe 224 is installed in the first mounting hole 227 , so as to facilitate the installation of the butt joint pipe 224 .

[0040] Furthermore, a semicircular hole is provided on the top of the first support member 221, and a half ring 228 is installed on the top of the first support member 221 by bolts. The first mounting hole 227 is surrounded by the first support member 221 and the half ring 228. The above structure can hold and fix the butt joint 224.

[0041] See also Figure 5 The second support member 222 is provided with a second mounting hole 229, and the push rod device 225 is installed in the second mounting hole 229 or installed on the side of the second support member 222 away from the first support member 221. When the push rod device 225 is installed in the second mounting hole 229, the second mounting hole 229 is used to position and install the push rod device 225. When the push rod device 225 is installed on the side of the second support member 222 away from the first support member 221, Figure 3 As shown, the function of the second mounting hole 229 is to provide space for the retaining ring 2253 and the sealing ring 2254 to expand and contract.

[0042] In a preferred embodiment, the first mounting hole 227 and the second mounting hole 229 are coaxial.

[0043] See also Figure 2 A plurality of valve mounting seats 220 are mounted on the base 210 of the test bench 200, the butt joints 224 between adjacent valve mounting seats 220 are connected to the piston rod 2251 through the second hydraulic hose 230, and the metering container 240 is arranged below the butt joint 224 of the last valve mounting seat 220. In this way, ball valves, butterfly valves and gate valves of the same nominal diameter can be tested simultaneously on one test bench 200.

[0044] When in use, the piston rod 2251 of the first valve mounting seat 220 is connected to the pressure supply device 100 through the first hydraulic hose 109, and the metering container 240 is arranged under the butt joint 224 of the last valve mounting seat 220. Each valve mounting seat 220 on the experimental table 200 is matched according to the shape of the valve 300. After the three valves 300 are respectively installed on each valve mounting seat 220, see Figure 2 First, the first valve on the left is closed and the two valves on the right are opened. At this time, the internal leakage of the first valve on the left is detected. Then the middle valve is closed and the two valves on both sides are opened. At this time, the internal leakage of the middle valve is detected. Then the right valve is closed and the two valves on the left are opened. At this time, the internal leakage of the right valve is detected.

[0045] Further, a baffle 211 is provided at the edge of the base 210 to prevent water from flowing into the workshop when installing and removing the valve. A drain pipe can be provided on the baffle 211 to discharge the water.

[0046] See also Figure 1 , the test bench 200 is provided with a plurality of them, so that valves with different nominal diameters can be tested.

[0047] Specifically, the infusion tube 102 of the liquid outlet of the pressure supply device 100 is connected to the distribution tube 106, and a plurality of branch tubes 107 are arranged on the distribution tube 106. The branch tubes 107 are connected to the piston rod 2251 on the first valve mounting seat 220 on the test bench 200 through the first hydraulic hose 109.

[0048] In addition to the liquid delivery system disclosed in CN209166741U, the pressure supply device 100 may also adopt other structures, see Figure 1 The pressure supply device 100 includes a pressure test pump 101 and a pressure regulating valve 103. The outlet of the pressure test pump 101 is installed with a liquid infusion tube 102. The pressure regulating valve 103 is installed on the liquid infusion tube 102. A main valve 104 and a pressure gauge 105 are installed in sequence on the liquid infusion tube 102 at the downstream end of the pressure regulating valve 103. A branch pipe 107 is installed at the downstream end of the pressure gauge 105. The branch pipe 107 is connected to the piston rod 2251 on the first valve mounting seat 220 on the test bench 200 through a first hydraulic hose 109.

[0049] Specifically, the pressure test pump 101 is a water pump, and the pressure regulating valve 103 is used to adjust the water pressure during the test. During the test, the liquid inlet of the pressure test pump 101 is connected to the water tank, and the liquid outlet is installed with a liquid infusion tube 102.

[0050] Since there is a problem of poor accuracy in determining whether there is internal leakage of the valve by measuring the amount of liquid leaking from the container 240, a flow meter 108 is further installed on the branch pipe 107. The flow meter 108 can be an electromagnetic flow meter or an ultrasonic flow meter.

[0051] The working principle or action process of the utility model is as follows:

[0052] See also Figure 2 Three valve mounting seats 220 are installed on the test bench 200 .

[0053] First, the first valve on the left is closed and the two valves on the right are opened, and the internal leakage of the first valve on the left is detected by the flow meter 108 and the measuring container 240; then the middle valve is closed and the two valves on both sides are opened, and the internal leakage of the middle valve is detected at this time; then the right valve is closed and the two valves on the left are opened, and the internal leakage of the right valve is detected at this time.

Claims

1. A valve internal leakage quantitative detection system, comprising a pressure supply device (100) and a test bench (200), characterized in that: The test bench (200) comprises a base (210) and a valve mounting seat (220) mounted on the base (210); the valve mounting seat (220) comprises a first support member (221) and a second support member (222) fixedly mounted on the base (210); a butt joint pipe (224) is mounted on the first support member (221); a butt joint ring (2241) is mounted on the butt joint pipe (224) at one end facing the second support member (222); a metering container (240) is arranged at the other end of the butt joint pipe (224); a push rod device (225) is mounted on the second support member (222); a piston rod (2241) of the push rod device (225) is mounted on the second support member (222); 51) is a hollow rod, a retaining ring (2253) is installed on one end of the piston rod (2251) facing the docking ring (2241), a sealing ring (2254) is sleeved on the piston rod (2251) and abuts against the retaining ring (2253), the sealing ring (2254) is aligned with the docking ring (2241), an external thread (2252) is provided on the other end of the piston rod (2251), one end of the first hydraulic hose (109) is connected to the external thread (2252) on the piston rod (2251), and the other end is connected to the pressure supply device (100); and a lifting member (226) is installed on the opposite side of the first support member (221) and the second support member (222), respectively.

2. A valve internal leakage quantitative detection system according to claim 1, characterized in that: A connecting rod (223) is provided between the first support member (221) and the second support member (222).

3. A valve internal leakage quantitative detection system according to claim 1, characterized in that: A first mounting hole (227) is provided on the first support member (221), and the butt joint pipe (224) is mounted in the first mounting hole (227).

4. A valve internal leakage quantitative detection system according to claim 3, characterized in that: A semicircular hole is provided on the top of the first support member (221); a semi-ring (228) is mounted on the top of the first support member (221) via bolts; and the first mounting hole (227) is formed by the first support member (221) and the semi-ring (228).

5. A valve internal leakage quantitative detection system according to claim 1, characterized in that: The second support member (222) is provided with a second mounting hole (229), and the push rod device (225) is mounted in the second mounting hole (229) or on a side of the second support member (222) away from the first support member (221).

6. A valve internal leakage quantitative detection system according to claim 1, characterized in that: A plurality of valve mounting seats (220) are mounted on the base (210) of the test bench (200); the butt joint pipes (224) between adjacent valve mounting seats (220) are connected to the piston rod (2251) via a second hydraulic hose (230); and the metering container (240) is arranged below the butt joint pipe (224) of the last valve mounting seat (220).

7. A valve internal leakage quantitative detection system according to claim 1, characterized in that: A baffle (211) is provided on the edge of the base (210).

8. A valve internal leakage quantitative detection system according to claim 1, characterized in that: The test bench (200) is provided with a plurality of infusion pipes (102) at the liquid outlet of the pressure supply device (100) connected to a distribution pipe (106), a plurality of branch pipes (107) are provided on the distribution pipe (106), and the branch pipes (107) are connected to the piston rod (2251) on the first valve mounting seat (220) on the test bench (200) via a first hydraulic hose (109).

9. A valve internal leakage quantitative detection system according to any one of claims 1 to 8, characterized in that: The pressure supply device (100) comprises a pressure test pump (101) and a pressure regulating valve (103); a liquid infusion tube (102) is installed at the liquid outlet of the pressure test pump (101); the pressure regulating valve (103) is installed on the liquid infusion tube (102); a main valve (104) and a pressure gauge (105) are installed in sequence on the liquid infusion tube (102) at the downstream end of the pressure regulating valve (103); a branch pipe (107) is installed at the downstream end of the pressure gauge (105); the branch pipe (107) is connected to a piston rod (2251) on the first valve mounting seat (220) on the test bench (200) via a first hydraulic hose (109).

10. A valve internal leakage quantitative detection system according to claim 9, characterized in that: A flow meter (108) is installed on the branch pipe (107).

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