A butterfly valve sealing detection device

Abstract

This utility model relates to a butterfly valve sealing detection device, including a device base box. A groove is formed on the top of the base box, and a first moving block and a second moving block are respectively located at both ends of the groove. A threaded rod passes through the interior of both the first and second moving blocks. Opposite threads at both ends of the threaded rod connect to threaded holes in the first and second moving blocks, respectively. A first fixed plate and a second fixed plate are respectively fixed to the top of the first and second moving blocks. A conveying component for conveying various media is located outside the first fixed plate, and a detection component for direct observation is located outside the second fixed plate. In butterfly valve sealing detection, this utility model uses the medium to push pistons and other components to move the scale block. The leakage level of the butterfly valve can be accurately classified based on the corresponding scale bar values ​​and pressure areas of the moving block. Furthermore, a wireless pressure sensor on the surface of the scale block can detect pressure data in real time. Combining this data with the scale bar data greatly improves the accuracy of sealing detection.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, specifically a butterfly valve sealing detection device. Background Technology

[0002] Currently, the butterfly valve disc is tested using a water pressure test method. The airtightness of the butterfly valve disc is judged by whether air bubbles appear. However, air bubbles may dissipate quickly, making them undetectable by operators and causing errors in the test results.

[0003] According to publicly available patent CN220230883U, a butterfly valve disc sealing performance testing device includes an upper mold and a lower mold. The upper mold has an air inlet pipe at its top and an upper cavity at its bottom, with the air inlet pipe communicating with the upper cavity. The lower mold has a lower cavity, which is a stepped hollow structure. An elastic membrane is laid at the bottom of the lower mold, and the elastic membrane is fixed below by a fixing ring, keeping it in an unfolded state. A positioning ring is provided at the bottom of the upper mold, and a positioning groove is provided at the top of the lower mold; the two cooperate with each other. This invention detects the airtightness of the butterfly valve disc by setting up an upper mold and a lower mold, with an elastic membrane at the bottom of the lower mold, and by observing whether the elastic membrane deforms. This method is simple, reliable, and easy to operate.

[0004] However, in practice, traditional butterfly valve sealing detection devices rely on observing the deformation of the elastic diaphragm to determine the airtightness of the butterfly valve disc. This method only provides a rough indication of leakage and fails to provide specific data on airtightness. Due to this lack of data support, the evaluation of butterfly valve sealing performance yields only vague results, limiting the depth and accuracy of the detection. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a butterfly valve sealing detection device. This addresses the problem that current traditional butterfly valve sealing detection devices rely on observing whether the elastic membrane deforms to determine the airtightness of the butterfly valve disc. However, this method can only roughly detect whether there is leakage in the butterfly valve disc, but cannot obtain specific data on airtightness. Due to the lack of data support, only vague results can be obtained when evaluating the sealing performance of the butterfly valve, which limits the depth and accuracy of the detection.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a butterfly valve sealing detection device is designed, including a device base box. A groove is opened on the top of the device base box. A first moving block and a second moving block are respectively provided at both ends of the groove. A threaded rod passes through the first moving block and the second moving block. The opposite threads at both ends of the threaded rod are respectively connected to the threaded holes in the first moving block and the second moving block. A first fixed plate and a second fixed plate are respectively fixed on the top of the first moving block and the second moving block. A conveying component for conveying various media is provided on the outside of the first fixed plate. A detection component for direct observation is provided on the outside of the second fixed plate.

[0007] Preferably, the detection component includes a detection cylinder, which is installed on one side of the second fixed plate. One end of a spring is fixed inside the detection cylinder, and a scale block is fixed to the other end of the spring. A wireless pressure sensor is installed on the surface of the scale block.

[0008] Preferably, a first valve connector is installed on the other side of the second fixed plate. The first valve connector has a piston inside, and a movable rod is fixed to one end of the piston. The movable rod passes through the first valve connector and the second fixed plate and extends into the detection cylinder, connecting with the movable disc located in the detection cylinder. It is used to push the movable block in the detection cylinder to move when the butterfly valve disc leaks.

[0009] Preferably, the surface of the detection cylinder is provided with scale bars, and multiple scale bars are divided into four pressure zones to determine the range of the current pressure.

[0010] Preferably, the conveying assembly includes a water-air dual-purpose pump, which is installed at one end of the first fixed plate. One end of the water-air dual-purpose pump is connected to a second valve connector installed on the other side of the first fixed plate, and the other end is connected to a hose. The end of the hose away from the water-air dual-purpose pump is connected to a liquid containment chamber in the bottom box of the device.

[0011] Preferably, the device has multiple electric heating tubes installed inside the bottom box, and each of the tubes has a liquid pipe connected to one end at both the top and bottom sides, with a cap detachably connected to the other end of the liquid pipe.

[0012] Preferably, one end of the threaded rod passes through the bottom box of the device and is connected to the output shaft of the drive motor via a coupling, and the drive motor is mounted on the side of the bottom box of the device.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, through the combination of a detection cylinder, piston, and moving block, enables sealing detection of the internal medium transport of a butterfly valve. If leakage occurs in the disc, the medium pushes the piston, causing the connected moving rod and moving disc to move. During this movement, the moving disc presses against the scale block inside the detection cylinder, simultaneously compressing the spring. Under the combined action of the spring force, the scale block moves to different positions within the detection cylinder. Multiple scale bars are distributed on the surface of the detection cylinder, dividing it into different pressure zones. Operators can accurately classify the leakage level of the butterfly valve based on the specific values ​​of the scale bars corresponding to the moving block and the pressure zone data, thus improving the accuracy of leakage detection. Furthermore, a wireless pressure sensor is installed on the surface of the scale block, enabling real-time detection of the pressure data generated when the moving disc presses against the scale block. By combining the pressure data detected by the wireless pressure sensor with the aforementioned scale bar and pressure zone data, the sealing condition of the butterfly valve can be analyzed from more dimensions, thereby further improving the accuracy of the sealing test. This solves the problem that traditional butterfly valve sealing test devices have always relied on observing whether the elastic diaphragm deforms to determine the airtightness of the butterfly valve disc. However, this method can only roughly detect whether there is a leak in the butterfly valve disc, but cannot obtain specific data information on airtightness. Due to the lack of data support, only a vague result can be obtained when evaluating the sealing performance of the butterfly valve, which limits the depth and accuracy of the test.

[0015] 2. This utility model combines a water-gas dual-purpose pump, a device base box, and an electric heating tube. It can not only extract the test liquid from the device base box and deliver it to the butterfly valve for liquid sealing testing of the butterfly valve disc to determine its sealing performance in a liquid environment, but also allows for the liquid in the base box to be drained first, followed by the water-gas dual-purpose pump to extract gas and inject it into the butterfly valve for gas sealing testing of the butterfly valve disc to evaluate its sealing effect in a gas environment. Furthermore, the electric heating tube heats the liquid or air in the device base box to a high temperature, and then the heated liquid and gas are used to test the sealing performance of the butterfly valve in high-temperature liquid and high-temperature gas environments. This diversified testing method improves the effectiveness of butterfly valve testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the detection component structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the bottom box structure of the device of this utility model.

[0019] In the diagram: 1. Device base box; 101. Liquid pipe; 102. Pipe cap; 2. Groove; 201. Drive motor; 202. First fixed plate; 203. Water-air dual-purpose pump; 204. Second valve connector; 205. Hose; 206. Second fixed plate; 207. First valve connector; 208. Detection cylinder; 209. Piston; 210. Moving rod; 211. Moving disk; 212. Scale block; 213. Spring; 214. Wireless pressure sensor; 215. Scale bar; 216. Threaded rod; 217. First moving block; 218. Second moving block; 3. Heating tube. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Example 1: A butterfly valve sealing detection device, see [link to example]. Figures 1 to 3 The device includes a base box 1, with a groove 2 on the top of the base box 1. A first moving block 217 and a second moving block 218 are respectively provided at both ends of the groove 2. A threaded rod 216 passes through the first moving block 217 and the second moving block 218. The opposite threads at both ends of the threaded rod 216 are connected to the threaded holes in the first moving block 217 and the second moving block 218 respectively. One end of the threaded rod 216 passes through the base box 1 and is connected to the output shaft of the drive motor 201 through a coupling. The drive motor 201 is installed on the side of the base box 1. A first fixed plate 202 and a second fixed plate 206 are respectively fixed on the top of the first moving block 217 and the second moving block 218.

[0022] When performing a sealing test on a butterfly valve using this butterfly valve sealing test device, the drive motor 201 is first started. The output shaft of the drive motor 201 drives the threaded rod 216 to rotate through the coupling. Since the two ends of the threaded rod 216 have opposite threads and are connected to the threaded holes in the first moving block 217 and the second moving block 218 respectively, the rotation of the threaded rod 216 will drive the first moving block 217 and the second moving block 218 to move towards or away from each other in the groove 2. The first moving block 217 and the second moving block 218 will drive the first fixed plate 202 and the second fixed plate 206 on their tops to move, thereby adjusting the position of the first fixed plate 202 and the second fixed plate 206 for subsequent connection with the butterfly valve. After the first fixed plate 202 and the second fixed plate 206 have moved to the appropriate position, the two ends of the butterfly valve are respectively sealed to the first valve connector 207 and the second valve connector 204 to ensure that the medium does not leak during the test. Next, the test operation is carried out. The test is divided into liquid sealing test, gas sealing test, and high temperature liquid and high temperature gas sealing test.

[0023] For details, see Figure 2The second fixed plate 206 is externally equipped with a detection component for direct observation. The detection component includes a detection cylinder 208, which is installed on one side of the second fixed plate 206. One end of a spring 213 is fixed inside the detection cylinder 208, and a scale block 212 is fixed to the other end of the spring 213. A wireless pressure sensor 214 is installed on the surface of the scale block 212. A first valve connector 207 is installed on the other side of the second fixed plate 206. A piston 209 is provided inside the first valve connector 207. A moving rod 210 is fixed to one end of the piston 209. The moving rod 210 passes through the first valve connector 207 and the second fixed plate 206 and extends into the detection cylinder 208, connecting with a moving disc 211 located inside the detection cylinder 208. This moving rod is used to push the moving block inside the detection cylinder 208 to move when the butterfly valve disc leaks. The surface of the detection cylinder 208 is provided with scale bars 215, which are divided into four pressure zones to determine the current pressure range.

[0024] When performing liquid seal testing, start the water-air dual-purpose pump 203. The water-air dual-purpose pump 203 draws the test liquid from the liquid containment chamber in the bottom box 1 of the device through the hose 205 and delivers it to the inside of the butterfly valve. At this time, observe the condition of the testing components. If the butterfly valve disc is properly sealed and there is no leakage, the scale block 212 and the moving disc 211 inside the detection cylinder 208 will not move, the spring 213 will remain in its initial state, and the wireless pressure sensor 214 will not detect any abnormal pressure data. If the butterfly valve disc leaks, the detection liquid will flow out from the leak and push the piston 209 inside the first valve connector 207. The piston 209 drives the moving disc 211 to move into the detection cylinder 208 via the moving rod 210. The moving disc 211 presses against the scale block 212 and compresses the spring 213. The spring 213 generates elastic force when compressed. This elastic force interacts with the pushing force of the moving disc 211 on the scale block 212, causing the scale block 212 to move to different positions inside the detection cylinder 208. The surface of the detection cylinder 208 is provided with scale bars 215. Multiple scale bars 215 divide the cylinder into four pressure zones. When the scale block 212 moves, the specific value of the corresponding scale bar 215 and the pressure zone data will be displayed. Changes occur, for example, the scale range of the scale bar 215 is 0-100, with four pressure zones: 0-25 (low pressure zone), 26-50 (medium-low pressure zone), 51-75 (medium-high pressure zone), and 76-100 (high pressure zone). When the scale block 212 moves to the position with a scale value of 30, it indicates that the current pressure is in the medium-low pressure zone. Based on these specific values ​​and pressure zone data, combined with the pre-set leakage level classification standards (e.g., low pressure zone corresponds to slight leakage, medium-low pressure zone corresponds to moderate leakage, etc.), the operator can accurately classify the leakage level of the butterfly valve, thereby improving the accuracy of leakage detection. At the same time, the wireless pressure sensor 214 installed on the surface of the scale block 212 will detect the pressure data generated when the moving disc 211 squeezes the scale block 212 in real time. The wireless pressure sensor 214 converts the detected pressure data into an electrical signal and sends it to an external data processing device (such as a computer or controller) through wireless transmission. After receiving the electrical signal, the data processing equipment converts it into a specific pressure value (the unit can be Pascal or MPa, etc.). For example, the pressure signal detected by the wireless pressure sensor 214 is converted to a pressure value of 0.5 MPa. Combining this pressure value with the scale bar 215 and the pressure zone data allows for analysis of the butterfly valve's sealing condition from more dimensions. For instance, if the pressure value is high and the scale bar 212 is in the high-pressure zone, it indicates a more serious leakage; conversely, if the pressure value is low and the scale bar 212 is in the low-pressure zone, it indicates a less serious leakage. In this way, the accuracy of the sealing detection is further improved.

[0025] During gas seal testing, the liquid in the bottom chamber 1 of the device is first discharged through the liquid pipe 101 (the pipe cap 102 on the liquid pipe 101 is opened to allow the liquid to flow out). Then, the water-gas dual-purpose pump 203 is restarted. At this time, the water-gas dual-purpose pump 203 draws in external gas and injects it into the butterfly valve through the second valve connector 204. The testing principle is the same as that for liquid seal testing. If the butterfly valve disc is well sealed, the scale block 212 and the moving disc 211 in the testing cylinder 208 will not move. If a leak occurs, the gas pushes the piston 209, which in turn moves the moving disc 211 and the scale block 212. The operator judges the leakage level based on the value of the scale bar 215, the pressure area data, and the pressure data detected by the wireless pressure sensor 214.

[0026] Further, see Figure 3 The first fixed plate 202 is provided with a conveying assembly for conveying various media. The conveying assembly includes a water-air dual-purpose pump 203. The water-air dual-purpose pump 203 is installed at one end of the first fixed plate 202. One end of the water-air dual-purpose pump 203 is connected to a second valve joint 204 installed on the other side of the first fixed plate 202. The other end is connected to a hose 205. The end of the hose 205 away from the water-air dual-purpose pump 203 is connected to a liquid containment chamber in the device base box 1. Multiple electric heating tubes 3 are installed inside the device base box 1. Both the upper and lower ends of the tubes are connected to one end of a liquid pipe 101. The other end of the liquid pipe 101 is detachably connected to a pipe cap 102.

[0027] When conducting high-temperature testing, first select whether to perform liquid or gas testing as needed. If performing high-temperature liquid testing, first inject the liquid into the liquid containment chamber in the bottom box 1 of the device, and then start the electric heating tube 3 inside the bottom box 1. After the electric heating tube 3 is powered on, it generates heat to heat the liquid in the liquid containment chamber. The temperature of the liquid is monitored in real time by a temperature controller (not shown in the figure). When the liquid temperature reaches the preset high temperature value (e.g., 100°C), the heating is stopped. Then, the water-gas dual-purpose pump 203 is started to transport the high-temperature liquid to the butterfly valve for sealing testing. During the testing process, the leakage situation is also judged based on the data of the detection components. If performing high-temperature gas testing, first drain the liquid in the bottom box 1 of the device, and then start the electric heating tube 3 to heat the air inside the bottom box 1 of the device. When the air temperature reaches the preset high temperature value (e.g., 150℃), the water-air dual-purpose pump 203 is started to draw high-temperature gas and inject it into the butterfly valve for sealing detection. The detection principle is the same as described above. The spring 213 plays a role in buffering and providing elasticity throughout the detection process. When the moving disc 211 pushes the scale block 212 to move, the spring 213 is compressed, and its elasticity will hinder the movement of the scale block 212. This makes the movement speed and displacement of the scale block 212 related to the pressure and flow rate of the leaking medium. If the pressure and flow rate of the leaking medium are large, the force pushing the piston 209 and the moving disc 211 will be large, the spring 213 will be compressed to a greater extent, and the displacement of the scale block 212 will be large. Conversely, if the pressure and flow rate of the leaking medium are small, the spring 213 will be compressed to a smaller extent, and the displacement of the scale block 212 will be smaller. The spring force of spring 213 can convert the pressure change of the leaking medium into the displacement change of the scale block 212, so that the staff can easily evaluate the sealing performance of the butterfly valve by observing the scale bar 215 and reading the data of the wireless pressure sensor 214.

[0028] It should be noted that the heating element 3 in this application is connected to an external thermostat, and the temperature of the heating element 3 is controlled by the thermostat, which is model KSD9700.

[0029] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

Claims

1. A butterfly valve sealing detection device, comprising a device base box (1), characterized in that, The device base box (1) has a groove (2) on the top. The groove (2) has a first moving block (217) and a second moving block (218) at both ends. The first moving block (217) and the second moving block (218) are both threaded rods (216) that pass through them. The opposite threads at both ends of the threaded rod (216) are connected to the threaded holes in the first moving block (217) and the second moving block (218). The first moving block (217) and the second moving block (218) are fixed with a first fixed plate (202) and a second fixed plate (206) on the top. The first fixed plate (202) is provided with a conveying component for conveying various media on the outside. The second fixed plate (206) is provided with a detection component for direct observation on the outside.

2. The butterfly valve sealing detection device as described in claim 1, characterized in that, The detection assembly includes a detection cylinder (208), which is installed on one side of the second fixed plate (206). One end of a spring (213) is fixed inside the detection cylinder (208), and a scale block (212) is fixed to the other end of the spring (213). A wireless pressure sensor (214) is installed on the surface of the scale block (212).

3. The butterfly valve sealing detection device as described in claim 1, characterized in that, A first valve connector (207) is installed on the other side of the second fixed plate (206). A piston (209) is provided inside the first valve connector (207). A movable rod (210) is fixed at one end of the piston (209). The movable rod (210) passes through the first valve connector (207) and the second fixed plate (206) and extends into the detection cylinder (208). It is connected to the movable disc (211) located in the detection cylinder (208) and is used to push the movable block in the detection cylinder (208) to move when the butterfly valve disc leaks.

4. The butterfly valve sealing detection device as described in claim 2, characterized in that, The surface of the detection cylinder (208) is provided with scale bars (215), and the multiple scale bars (215) are divided into four pressure zones to determine the range of the current pressure zone.

5. The butterfly valve sealing detection device as described in claim 1, characterized in that, The conveying assembly includes a water-air dual-purpose pump (203), which is installed at one end of the first fixed plate (202). One end of the water-air dual-purpose pump (203) is connected to a second valve connector (204) installed on the other side of the first fixed plate (202), and the other end is connected to a hose (205). The end of the hose (205) away from the water-air dual-purpose pump (203) is connected to the liquid containment chamber in the device base box (1).

6. The butterfly valve sealing detection device as described in claim 1, characterized in that, The device has multiple electric heating tubes (3) installed inside the bottom box (1), and both the upper and lower ends of the tubes are connected to one end of a liquid tube (101). The other end of the liquid tube (101) is detachably connected to a tube cap (102).

7. The butterfly valve sealing detection device as described in claim 1, characterized in that, One end of the threaded rod (216) passes through the device base box (1) and is connected to the output shaft of the drive motor (201) via a coupling. The drive motor (201) is mounted on the side of the device base box (1).

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