An ultrasonic gas meter water tightness testing device

Abstract

This application relates to the field of gas meter casing testing, and in particular to an ultrasonic gas meter water tightness testing device, including a housing, on which a testing device for testing the water tightness of the gas meter casing is installed. The testing device includes an immersion mechanism, a gas circulation mechanism, and a cleaning mechanism. The gas circulation mechanism is used to position the gas meter casing and fill it with gas. The immersion mechanism is installed on the housing and located below the gas circulation mechanism. The immersion mechanism is used to immerse the gas meter casing positioned in the gas circulation mechanism in water. The cleaning mechanism includes a cleaning brush and a drive assembly. The drive assembly is installed on the immersion mechanism, and the cleaning brush is installed on the drive assembly. The cleaning brush is used to remove air bubbles from the gas meter casing submerged in water. This application improves upon the problem of inconvenient air bubble removal on the surface of the gas meter casing in traditional methods, and can achieve the effect of conveniently removing air bubbles from the surface of the gas meter casing.

Description

Technical Field

[0001] This application relates to the field of gas meter casing testing, and in particular to an ultrasonic gas meter water tightness testing device. Background Technology

[0002] An ultrasonic gas meter is an instrument that uses ultrasonic technology to measure gas flow rate, and is mainly used for gas metering and billing.

[0003] The casing of an ultrasonic gas meter is typically composed of two shells joined together. The upper shell usually has two interfaces for connecting to the gas pipe. To ensure the safety of gas use, the gas meter must be watertight; therefore, the watertightness of the gas meter casing needs to be tested after it is manufactured.

[0004] Currently, the water tightness test for gas meter housings typically involves immersing the gas meter housing in water and connecting the two ports at the top of the gas meter housing to the inlet and outlet pipes of an external gas source, respectively. Air is then introduced into the gas meter housing through the external gas source, and the water tightness of the gas meter housing is determined by observing whether air bubbles appear at the joint between the top and bottom of the gas meter housing.

[0005] However, when a gas meter is first submerged in water, air bubbles can easily form in the water and adhere to the gas meter casing, thus affecting the judgment of the gas meter casing's water tightness. Therefore, it is necessary to manually use a brush to sweep around the joint of the gas meter casing in the water to remove the air bubbles, and then introduce air into the gas meter casing to begin the water tightness test. However, manually cleaning the air bubbles from the gas meter casing is usually quite inconvenient. Summary of the Invention

[0006] In order to facilitate the removal of air bubbles from the gas meter housing before conducting a water tightness test, this application provides an ultrasonic gas meter water tightness testing device.

[0007] This application provides an ultrasonic gas meter water tightness testing device, which adopts the following technical solution:

[0008] An ultrasonic gas meter water tightness testing device includes a housing. A testing device for testing the water tightness of the gas meter casing is installed on the housing. The testing device includes an immersion mechanism, a gas circulation mechanism, and a cleaning mechanism. The gas circulation mechanism includes an inflation component and a support component. The support component is installed at the upper end of the housing, and the inflation component is installed on the support component. The support component is used to position the gas meter casing, and the inflation component is used to inflate the gas meter casing with gas. The immersion mechanism is installed on the housing and below the gas circulation mechanism. The immersion mechanism is used to immerse the gas meter casing, positioned on the support component, in water. The cleaning mechanism includes a cleaning brush and a driving component. The driving component is installed on the immersion mechanism, and the cleaning brush is installed on the driving component. The cleaning brush is used to remove air bubbles from the gas meter casing immersed in water.

[0009] By adopting the above technical solution, when testing the water tightness of the gas meter housing, the gas meter housing is first installed on the support assembly, then the gas meter housing is immersed in water through the immersion mechanism, and then the cleaning brush is driven by the drive assembly to move along the surface of the gas meter housing to remove air bubbles from the surface of the gas meter housing. Finally, air is injected into the gas meter housing through the inflation assembly, and the water tightness of the gas meter housing is determined by observing whether air bubbles are generated on the surface of the gas meter housing.

[0010] In one specific implementation, the drive assembly includes a drive motor, a drive chain, and drive sprockets. A plurality of drive sprockets are provided, and all of the drive sprockets are rotatably mounted within the immersion mechanism. The drive sprockets are arranged along the periphery of the gas meter housing. The drive motor is also mounted on the immersion mechanism, and its output shaft is connected to one of the drive sprockets. The drive chain is wound around the plurality of drive sprockets, and the cleaning brush is mounted on the drive chain.

[0011] By adopting the above technical solution, the drive motor drives the drive sprocket to rotate, which in turn drives the drive chain to move. The drive chain then drives the cleaning brush to move along the periphery of the gas meter housing, thereby cleaning the air bubbles on the surface of the gas meter housing and facilitating the testing of the water tightness of the gas meter housing.

[0012] In one specific implementation, the immersion mechanism includes an immersion tank and a lifting assembly. The lifting assembly includes a lifting motor, a lifting screw, and a lifting plate. The lifting screw is mounted vertically on the tank. The lifting motor and the lifting plate are also mounted on the tank. The output shaft of the lifting motor is connected to one end of the lifting screw. The lifting plate is threadedly connected to the lifting screw. The immersion tank is mounted on the lifting plate. The immersion tank is used to store water and also to store a gas meter housing.

[0013] By adopting the above technical solution, the lifting motor drives the lifting screw to rotate, thereby causing the lifting plate to move in the vertical direction. This allows the lifting plate to move the immersion tank in the vertical direction, making it easier for the immersion tank to immerse the gas meter casing in water.

[0014] In one specific implementation, the supporting assembly includes a support rod, a pressure plate, and a clamping cylinder. The clamping cylinder is mounted on the housing, and its piston rod extends downward. The pressure plate is mounted on the piston rod of the clamping cylinder. The inflation assembly is mounted on the pressure plate. The support rod is L-shaped, with its vertical section mounted on the side wall of the clamping cylinder and one end of the vertical section extending downward. The horizontal section of the support rod extends towards the clamping cylinder, and the space between the horizontal section of the support rod and the pressure plate is used to accommodate a gas meter housing.

[0015] By adopting the above technical solution, the gas meter housing is placed on the horizontal section of the support rod, and the pressing cylinder drives the pressure plate to move downward, thereby causing the pressure plate to drive the inflation component to descend and connect the inflation component to the interface at the upper end of the gas meter housing. This facilitates the inflation component to inflate the gas meter housing, thereby enabling the detection of the water tightness of the gas meter housing.

[0016] In one specific implementation, the inflation assembly includes an inlet connector and an outlet connector. The inlet connector is installed at one end of the pressure plate, and the outlet connector is installed at the other end of the pressure plate. The inlet connector and the outlet connector are respectively connected to an external gas source through a pipe, and the inlet connector and the outlet connector are respectively used to be inserted into the interface on the gas meter housing.

[0017] By adopting the above technical solution, air is delivered to the air inlet joint through an external air source, so that the air enters the gas meter housing through the air inlet joint and is discharged from the gas meter housing through the air outlet joint. This makes it easy to observe whether air bubbles are generated at the joint of the gas meter housing submerged in water during the air flow process, thus facilitating the detection of the water tightness of the gas meter housing.

[0018] In one specific implementation, the gas circulation mechanism further includes an inlet sealing assembly and an outlet sealing assembly. The inlet sealing assembly is mounted on an inlet connector, and the outlet sealing assembly is mounted on an outlet connector. The inlet and outlet sealing assemblies have the same structure. Both the inlet and outlet sealing assemblies include a supporting member. A mounting plate is slidably mounted on the bottom wall of the pressure plate, and a buffer spring is mounted on the mounting plate. One end of the buffer spring is connected to the mounting plate, and the other end is connected to the pressure plate. The supporting member includes an installation tube and a support. The gas meter housing includes a gas valve and a rubber nozzle. The mounting tube is fitted onto the air inlet connector, and the upper end of the mounting tube is connected to the mounting plate. A gap is left between the mounting tube and the air inlet connector. The rubber nozzle is inverted conical in shape and is installed at the lower end of the mounting tube. A gap is also left between the rubber nozzle and the air inlet connector. The rubber nozzle is used to insert into the connector of the gas meter housing. The gas valve is fitted onto the outer wall of the lower end of the air inlet connector. The gas valve is located between the rubber nozzle and the air inlet connector, and the side wall of the gas valve is used to squeeze the inner wall of the rubber nozzle near the air inlet connector.

[0019] By adopting the above technical solution, while the pressure plate is lowered by the pressing cylinder, the pressure plate also lowers the mounting plate. This causes the rubber nozzle at the lower end of the mounting pipe to descend into the interface that connects to the upper end of the gas meter housing. Simultaneously, the air inlet connector also descends with the pressure plate into the interface that connects to the gas meter housing. When the rubber nozzle is inserted into the interface of the gas meter housing, the descent of the mounting plate encounters resistance, causing displacement relative to the pressure plate and compressing the buffer spring. At this time, the air inlet connector causes the expansion ball to continue moving downward, causing the expansion ball to move downward until it abuts against the inner wall of the rubber nozzle. This causes the rubber nozzle to be squeezed and deformed, ensuring that the outer wall of the rubber nozzle fully abuts against the inner wall of the interface of the gas meter housing. This facilitates maintaining the airtightness of the connection between the rubber nozzle and the gas meter housing. At the same time, the contact between the expansion ball and the inner wall of the rubber nozzle maintains the seal between the air inlet connector and the rubber nozzle. This facilitates maintaining the airtightness between the air inlet connector and the gas meter housing when testing the watertightness of the gas meter housing.

[0020] In one specific implementation, both the inlet sealing assembly and the outlet sealing assembly further include a positioning element. The positioning element includes a mounting rod, a push rod, a positioning spring, and a clamping rod. The mounting rod is mounted on the side wall of the mounting tube. The push rod is mounted on the mounting rod in a direction perpendicular to the axis of the mounting tube, and one end of the push rod passes through the side wall of the mounting tube and extends into the gap between the mounting tube and the inlet connector. The end of the push rod near the inlet connector is used to connect with the expansion ball. The clamping rod is rotatably mounted on the end of the mounting rod away from the mounting tube, and one end of the clamping rod extends downward to the rubber nozzle. The lower end of the clamping rod is used to abut against the outer side wall of the gas meter housing located at the inlet. The positioning spring is mounted on the push rod, and one end of the positioning spring abuts against the side wall of the clamping rod, while the other end is connected to the mounting rod.

[0021] By adopting the above technical solution, when the air inlet connector drives the expansion ball to descend to the inner wall of the rubber nozzle, the expansion ball drives the push rod to move, causing the push rod to push the upper end of the clamping rod and compress the positioning spring, causing the lower end of the clamping rod to move towards the interface of the gas meter housing, so that the lower end of the clamping rod abuts against the outer wall of the interface of the gas meter housing, thereby positioning the outer wall of the interface of the gas meter housing, thereby further reducing the shaking of the gas meter housing, which would affect the airtightness between the air inlet connector and the interface of the gas meter housing.

[0022] In one specific implementation, a guide rod is installed on the top wall of the expanding ball. The guide rod is sleeved on the outer wall of the air intake connector. The guide rod extends upward along the axis of the air intake connector. A guide block is installed at the upper end of the guide rod. The end of the guide block near the guide rod is provided with an abutting slope, which is used to abut against the top rod.

[0023] By adopting the above technical solution, when the ball descends, the guide rod drives the guide block to move downward, so that the lower end of the guide block abuts the end of the top rod, thereby pushing the top rod away from the installation tube, thus realizing the action of pushing the clamping rod to rotate.

[0024] In one specific implementation, the gas circulation mechanism further includes a clamping assembly comprising a first clamping block, a second clamping block, and a clamping spring. A support plate is also mounted on the support rod. Both the first and second clamping blocks are mounted on the support plate, with space between them for placing a gas meter housing. One end of the first clamping block extends upward, and the other end extends obliquely toward the second clamping block. One end of the second clamping block extends upward, and the other end extends obliquely toward the first clamping block. A top plate is also mounted on the support plate, positioned above the ends of the first and second clamping blocks closest to the support plate. The top plate abuts against the lower ends of the first and second clamping blocks. The clamping spring is mounted on the top plate, and one end of the clamping spring is connected to the support plate.

[0025] By adopting the above technical solution, when the gas meter housing is placed on the support plate on the support rod, the bottom wall of the gas meter housing abuts against the top plate, causing the top plate to press down on the lower ends of the first and second clamping blocks and compress the clamping spring, thereby clamping the side wall of the gas meter housing with the upper ends of the first and second clamping blocks, thus facilitating the maintenance of the stability of the gas meter housing on the support rod.

[0026] In one specific implementation, the gas circulation mechanism and cleaning mechanism are provided in multiple sets.

[0027] By adopting the above technical solution and setting up multiple gas circulation and cleaning mechanisms, it is convenient to test the water tightness of multiple gas meter housings at one time, thereby improving the efficiency of gas meter housing testing.

[0028] In summary, this application includes at least one of the following beneficial effects:

[0029] 1. This application incorporates a cleaning mechanism to facilitate the removal of air bubbles from the surface of the gas meter casing that has just been submerged in water, thereby ensuring the accuracy of the water tightness test of the gas meter casing.

[0030] 2. By setting up an inlet sealing component and an outlet sealing component, this application facilitates the maintenance of airtightness at the interface connection between the inlet connector and the gas meter housing through the inlet sealing component and the outlet sealing component, thereby facilitating the maintenance of the accuracy of the water tightness detection of the gas meter housing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the ultrasonic gas meter water tightness testing equipment of this application.

[0032] Figure 2 This is a schematic diagram of the lifting component in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram of the gas circulation mechanism in an embodiment of this application.

[0034] Figure 4 This is a schematic diagram of the intake sealing assembly in an embodiment of this application.

[0035] Figure 5 This is an exploded view of the intake sealing assembly in an embodiment of this application.

[0036] Figure 6 This is a schematic diagram of the intake sealing assembly and the gas meter housing being sealed in an embodiment of this application.

[0037] Figure 7 This is a schematic diagram of the clamping assembly in an embodiment of this application.

[0038] Figure 8 This is a schematic diagram of the cleaning mechanism in the embodiments of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Housing; 2. Gas circulation mechanism; 21. Support assembly; 211. Support rod; 212. Pressure plate; 213. Pressing cylinder; 22. Inflation assembly; 221. Inlet connector; 222. Outlet connector; 23. Inlet sealing assembly; 231. Mounting tube; 232. Spreading ball; 2321. Guide rod; 233. Rubber nozzle; 234. Mounting plate; 235. Buffer spring; 236. Guide block; 237. Mounting rod; 238. Top rod; 239. Positioning spring; 2310. Clamping rod; 24. Outlet sealing assembly 25. Sealing assembly; 25. Clamping assembly; 251. First clamping block; 252. Second clamping block; 253. Clamping spring; 254. Support plate; 255. Top plate; 3. Immersion mechanism; 31. Immersion tank; 32. Lifting assembly; 321. Lifting motor; 322. Lifting screw; 323. Lifting plate; 4. Cleaning mechanism; 41. Cleaning brush; 42. Drive assembly; 421. Drive motor; 422. Drive chain; 423. Drive sprocket; 424. Mounting block; 425. Auxiliary sprocket; 5. Gas meter housing. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0042] This application discloses an ultrasonic gas meter water tightness testing device, referring to... Figure 1 , Figure 2 and Figure 8 The device includes a housing 1, on which a testing device for detecting the water tightness of a gas meter housing 5 is installed. The testing device includes a gas circulation mechanism 2, an immersion mechanism 3, and a cleaning mechanism 4. The gas circulation mechanism 2 is installed at the upper end of the housing 1 and is used to fill the gas meter housing 5 with gas. The immersion mechanism 3 is installed on the housing 1 and located below the gas circulation mechanism 2. The immersion mechanism 3 is used to immerse the gas meter housing 5 in water. The cleaning mechanism 4 is installed on the housing 1 and is used to remove air bubbles from the surface of the gas meter housing 5 submerged in water. Multiple sets of the gas circulation mechanism 2 and the cleaning mechanism 4 are provided.

[0043] Reference Figure 2 and Figure 3The gas circulation mechanism 2 includes a support assembly 21, an inflation assembly 22, an inlet sealing assembly 23, and an outlet sealing assembly 24. The support assembly 21 includes a support rod 211, a pressure plate 212, and a pressing cylinder 213. The pressing cylinder 213 is fixedly installed at the upper end inside the housing 1, and the piston rod of the pressing cylinder 213 extends downward. The pressure plate 212 is fixedly installed on the piston rod of the pressing cylinder 213. The support rod 211 is an L-shaped rod. The vertical section of the support rod 211 is fixedly installed on the side wall of the pressing cylinder 213 through a connecting rod. The horizontal section of the support rod 211 extends towards the pressing cylinder 213 to below the pressure plate 212, and there is sufficient space between the horizontal section of the support rod 211 and the pressure plate 212 to accommodate the gas meter housing 5.

[0044] Reference Figure 3 and Figure 4 The inflation assembly 22 includes an inlet connector 221 and an outlet connector 222. The inlet connector 221 is fixedly installed vertically at one end of the pressure plate 212, with one end extending downwards and the other end connected to an external gas source via a pipe. The inlet connector 221 is used to insert into an interface at the upper end of the gas meter housing 5. The outlet connector 222 is also fixedly installed vertically at the other end of the pressure plate 212, with one end also extending downwards and the other end connected to an external gas source via a pipe. The lower end of the outlet connector 222 is used to insert into another interface at the upper end of the gas meter housing 5. Air is supplied from the inlet connector 221 to the gas meter housing 5 via the external gas source, and then returned to the external gas source via the outlet connector 222. This method and the specific external gas source are existing technologies in the art and will not be described in detail here.

[0045] Reference Figure 4 and Figure 5The intake sealing assembly 23 and the exhaust sealing assembly 24 have the same structure. The intake sealing assembly 23 is installed on the intake connector 221, and the exhaust sealing assembly 24 is installed on the exhaust connector 222. Taking the intake sealing assembly 23 as an example, the intake sealing assembly 23 includes a support member and a positioning member. The support member includes an installation tube 231, a support ball 232, and a rubber nozzle 233. An installation plate 234 is slidably installed on the bottom wall of the pressure plate 212. The sliding path of the installation plate 234 is... The piston rods of the pressing cylinder 213 are aligned with each other, and a buffer spring 235 is installed on the side wall of the mounting plate 234 near the pressure plate 212. One end of the buffer spring 235 is fixedly connected to the top wall of the mounting plate 234, and the other end is fixedly connected to the bottom wall of the pressure plate 212. The mounting tube 231 is fixedly installed on the bottom wall of the mounting plate 234, and the mounting tube 231 is sleeved on the air inlet connector 221, with a gap between the inner wall of the mounting tube 231 and the outer wall of the air inlet connector 221. The rubber nozzle 233 is inverted conical, and the upper end of the rubber nozzle 233 is fixedly installed on the lower end of the mounting tube 231. The diameter of the upper end of the rubber nozzle 233 is larger than the inner diameter of the interface of the gas meter housing 5. The lower end of the rubber nozzle 233 extends downward, and the lower end of the rubber nozzle 233 is used to insert into the air inlet of the gas meter housing 5, with a gap between the inner wall of the rubber nozzle 233 and the outer wall of the air inlet connector 221.

[0046] Reference Figure 4 and Figure 5 The expansion ball 232 is hemispherical, and the air inlet connector 221 passes through the top wall of the expansion ball 232, so that the expansion ball 232 is fitted on the outer wall of the air inlet connector 221, and the expansion ball 232 is fixedly connected to the outer wall of the air inlet connector 221. The arc-shaped surface of the expansion ball 232 faces the support rod 211, and the arc-shaped side wall of the expansion ball 232 abuts against the inner wall of the rubber nozzle 233. In the initial position, the expansion ball 232 is located at the rubber nozzle 233 at the lower end of the mounting tube 231. A guide rod 2321 is fixedly installed on the top wall of the ball 232. The guide rod 2321 is sleeved on the outer wall of the air inlet connector 221. The guide rod 2321 extends upward along the axis of the mounting tube 231. A guide block 236 is fixedly installed on the side wall of the upper end of the guide rod 2321. The guide block 236 is located between the inner wall of the mounting tube 231 and the outer wall of the air inlet connector 221. The lower end of the side wall of the guide block 236 near the inner wall of the mounting tube 231 is provided with an abutting slope.

[0047] Reference Figure 4 and Figure 5Two sets of positioning components are provided, which are symmetrically arranged on the side walls on both sides of the axis of the mounting tube 231. The positioning components include a mounting rod 237, a top rod 238, a positioning spring 239, and a clamping rod 2310. The mounting rod 237 is an L-shaped rod. One end of the horizontal section of the mounting rod 237 is fixedly installed on the side wall of the mounting tube 231, and the axis of the horizontal section of the mounting rod 237 is perpendicular to the axis of the mounting tube 231. The top rod 238 is slidably installed on the horizontal section of the mounting rod 237 along the axial direction of the horizontal section of the mounting rod 237, and one end of the top rod 238 passes through the side wall of the mounting tube 231 and extends to the bottom of the guide block 236. The end of the top rod 238 located inside the mounting tube 231 is used to abut against the abutting slope of the guide block 236. The clamp rod 2310 is rotatably mounted on the side wall of the vertical section of the mounting rod 237, and the rotation axis of the clamp rod 2310 is located in the horizontal direction and perpendicular to the axis of the vertical section of the mounting rod 237. The rotation axis of the clamp rod 2310 is located below the axis of the top rod 238, and the side wall of the upper end of the clamp rod 2310 is slidably connected to the end of the top rod 238 away from the mounting tube 231. The side wall of the lower end of the clamp rod 2310 is used to abut against the outer side wall of the interface at the upper end of the gas meter housing 5. A thin rod is fixedly installed at the end of the top rod 238 away from the mounting tube 231. The thin rod is coaxial with the top rod 238, and the diameter of the thin rod is smaller than the diameter of the top rod 238. The thin rod passes through the side wall of the clamping rod 2310 and is slidably connected to the clamping rod 2310. A positioning spring 239 is installed on the thin rod, and one end of the positioning spring 239 abuts against the side wall of the clamping rod 2310, while the other end abuts against the side wall of the horizontal section of the mounting rod 237 away from the mounting tube 231.

[0048] Reference Figure 4 and Figure 6When it is necessary to test the water tightness of the gas meter housing 5, the gas meter housing 5 is placed on the horizontal section of the support rod 211, aligning the two interfaces at the upper end of the gas meter housing 5 with the inlet connector 221 and outlet connector 222 on the pressure plate 212, respectively. Then, the pressure plate 212 is lowered by the clamping cylinder 213, causing the pressure plate 212 to lower the inlet connector 221 and outlet connector 222 to the interfaces of the gas meter housing 5, and also causing the mounting plate 234 to lower to the gas meter housing 5. This causes the mounting tube 231 on the mounting plate 234 to drive the rubber nozzle 233 to be inserted into the interface of the gas meter housing 5. Then, as the pressing cylinder 213 drives the pressure plate 212 to continue descending to the end of the stroke of the pressing cylinder 213, the rubber nozzle 233 receives resistance from the gas meter housing 5, thereby driving the mounting plate 234 to compress the buffer spring 235, thus causing the pressure plate 212 and the mounting plate 234 to have relative displacement. This causes the air inlet connector 221 on the pressure plate 212 to drive the expansion ball 232 relative to the rubber nozzle 235. The nozzle 233 moves downward, causing the expanding ball 232 to move downward along the inner wall of the rubber nozzle 233. This causes the outer wall of the expanding ball 232 to abut against the inner wall of the rubber nozzle 233, thus expanding the rubber nozzle 233 located within the interface of the gas meter housing 5. The outer wall of the rubber nozzle 233 within the interface of the gas meter housing 5 abuts against the inner wall of the interface of the gas meter housing 5, thereby reducing the gap between the rubber nozzle 233 and the inner wall of the interface of the gas meter housing 5, and thus maintaining the rubber nozzle's position. The nozzle 233 is inserted into the interface of the gas meter housing 5 to ensure airtightness. At the same time, since the expansion ball 232 abuts against the inner wall of the rubber nozzle 233, the gap between the expansion ball 232 and the inner wall of the rubber nozzle 233 is reduced, which makes it easier to maintain the airtightness between the rubber nozzle 233 and the expansion ball 232. This ensures that the interface between the air inlet connector 221 and the gas meter housing 5 maintains good airtightness, thereby improving the accuracy of the watertightness detection of the gas meter housing 5 when gas is introduced into the gas meter housing 5.

[0049] Reference Figure 4 and Figure 6When the piston rod of the clamping cylinder 213 reaches the end of its stroke, the pressure plate 212 causes the expansion ball 232 to move relative to the mounting tube 231, thereby causing the expansion ball 232 to move the guide rod 2321 downward relative to the mounting tube 231. This causes the guide rod 2321 to move the guide block 236 down to the top rod 238, so that the contact slope of the guide block 236 contacts the end of the top rod 238, pushing the top rod 238 away from the mounting tube 231. This causes the top rod 238 to push the upper end of the clamping rod 2310, thereby causing the clamping rod 2310 to move downward. The lower end of clamp 10 rotates towards the mounting pipe 231, causing the lower end of clamp 2310 to rotate to abut against the side wall of the interface of the gas meter housing 5. Simultaneously, the two symmetrically arranged clamps 2310 clamp the side wall of the interface of the gas meter housing 5, thus positioning the upper end of the gas meter housing 5. This reduces the risk of movement of the gas meter housing 5 due to water resistance when submerged, which could lead to misalignment between the gas meter housing 5 and the rubber nozzle 233, affecting the airtightness between them. Similarly, the gas outlet sealing assembly 24 positions the other interface of the gas meter housing 5 and maintains the airtightness of the connection between the gas outlet connector 222 and the other interface of the gas meter housing 5.

[0050] Reference Figure 4 and Figure 6 After the gas meter housing 5 completes the test, the pressure plate 212 moves upward through the clamping cylinder 213, thereby moving the air inlet connector 221 upward. This causes the air inlet connector 221 to gradually separate from the gas meter housing 5. Simultaneously, as the air inlet connector 221 moves upward, it causes the expanding ball 232 to move upward relative to the rubber nozzle 233. This causes the expanding ball 232 to move the guide block 236 upward via the guide rod 2321, thereby separating the guide block 236 from the push rod 238. Under the action of the positioning spring 239, the clamp 2310 moves towards the mounting tube 231, thereby causing the upper end of the clamping rod 2310 to rotate towards the mounting tube 231. This causes the lower end of the clamping rod 2310 to rotate away from the rubber nozzle 233, thus loosening the lower end of the clamping rod 2310 from the side wall at the interface of the gas meter housing 5. At this time, under the action of the buffer spring 235 which is in a compressed state, the mounting plate 234 keeps the rubber nozzle 233 inserted into one interface of the gas meter housing 5 through the mounting tube 231. As the pressure plate 212 continues to rise, when the buffer spring 235 is in a relaxed state, the pressure plate 212 drives the mounting plate 234 to move upward, causing the mounting plate 234 to drive the rubber nozzle 233 upward through the mounting tube 231. This separates the rubber nozzle 233 from the interface of the gas meter housing 5, making it easier to remove the gas meter housing 5 from the support assembly 21.

[0051] Reference Figure 7The gas circulation mechanism 2 also includes a clamping assembly 25, which includes a first clamping block 251, a second clamping block 252, and a clamping spring 253. A support plate 254 is fixedly installed on the horizontal section of the support rod 211. The first clamping block 251 and the second clamping block 252 are both rotatably mounted on the support plate 254, and the first clamping block 251 and the second clamping block 252 are symmetrically arranged. A space is left between the first clamping block 251 and the second clamping block 252 for placing the gas meter housing 5. The pivot of the first clamping block 251 is located between the upper and lower ends of the first clamping block 251, and the pivot of the second clamping block 252 is also located between the upper and lower ends of the second clamping block 252. A top plate 255 is slidably mounted on the top wall of the support plate 254 in the vertical direction. The bottom wall of the top plate 255 abuts against the lower ends of the first clamping block 251 and the second clamping block 252. A clamping spring 253 is installed between the top plate 255 and the support plate 254, with one end of the clamping spring 253 abutting against the bottom wall of the top plate 255 and the other end abutting against the top wall of the support plate 254.

[0052] Reference Figure 2 The immersion mechanism 3 includes an immersion tank 31 and a lifting assembly 32. The lifting assembly 32 includes a lifting motor 321, a lifting screw 322, and a lifting plate 323. The lifting screw 322 is rotatably mounted on the tank 1 in the vertical direction, and both ends of the tank 1 are rotatably provided with lifting screws 322. There are two lifting motors 321, and the two lifting motors 321 correspond one-to-one with the two lifting screws 322. Both lifting motors 321 are fixedly mounted on the tank 1, and the output shaft of the lifting motor 321 is coaxially connected to the upper end of the lifting screw 322. The lifting plate 323 is slidably mounted on the tank 1 in the vertical direction, and the lifting plate 323 is located below the gas circulation mechanism 2. Both ends of the lifting plate 323 are threadedly connected to the two lifting screws 322 respectively. The immersion tank 31 is made of transparent glass and has an opening at the top. The immersion tank 31 is fixedly installed on the top wall of the lifting plate 323. Water is introduced into the immersion tank 31, and the immersion tank 31 is used to immerse the gas meter housing 5 on the support assembly 21 in water.

[0053] Reference Figure 8, the cleaning mechanism 4 includes a cleaning brush 41 and a driving component 42. The driving component 42 includes a driving motor 421, a driving chain 422 and driving sprockets 423. There are five driving sprockets 423, four of which respectively correspond to the four corners of the gas meter housing 5, and are all rotatably installed on the inner bottom wall of the immersion tank 31. The rotation axes of the four driving sprockets 423 are all in the vertical direction. The remaining one driving sprocket 423 is rotatably installed below the vertical section of the support rod 211, and the rotation axis of this driving sprocket 423 is parallel to the rotation axes of the other four driving sprockets 423. The five driving sprockets 423 are arranged in a "convex" shape. The driving motor 421 is fixedly installed on the bottom wall of the lifting plate 323, and the output shaft of the driving motor 421 sequentially passes through the bottom wall of the lifting plate 323 and the immersion tank 31 upward, and the output shaft of the driving motor 421 is coaxially connected to one of the driving sprockets 423. The driving chain 422 is wound around the five driving sprockets 423, and two auxiliary sprockets 425 are also rotatably installed on the bottom wall of the immersion tank 31 below the support rod 211. The auxiliary sprockets 425 are used to press the driving chain 422, so that the driving chain 422 also forms a "convex" shape. The lower end of the cleaning brush 41 is fixedly installed with a mounting block 424, and the mounting block 424 is fixedly installed on the side wall of the driving chain 422.

[0054] The working principle of the embodiment of the present application is as follows: Place the gas meter housing 5 to be detected on the support plate 254 on the support rod 211, align the two interfaces at the upper end of the gas meter housing 5 with the inlet joint 221 and the outlet joint 222 respectively, and press down the top plate 255 on the support plate 254 by the gravity of the gas meter housing 5 itself, so that the top plate 255 compresses the clamping spring 253 and drives the lower ends of the first clamping block 251 and the second clamping block 252 to rotate, so that the upper ends of the first clamping block 251 and the second clamping block 252 move towards the gas meter housing 5 and abut against the side wall of the gas meter housing 5, thereby initially limiting the gas meter housing 5.

[0055] Then, the pressure plate 212 moves downward through the pressing cylinder 213, causing the pressure plate 212 to move downward along with the inlet connector 221 and outlet connector 222. Simultaneously, the pressure plate 212 also moves the mounting plate 234 downward, thereby moving the rubber nozzle 233 downward. The rubber nozzle 233 is then inserted into the interface at the upper end of the gas meter housing 5, causing the outer wall of the rubber nozzle 233 to abut against the inner wall of the interface of the gas meter housing 5. This creates resistance to the descent of the mounting plate 234, causing the pressure plate 212 to compress the buffer spring 235. This, in turn, causes the inlet connector 221 and outlet connector 222 to descend relative to the mounting pipe 231 on the mounting plate 234, thus causing the expanding ball 232 to move downward along with the inlet connector 221 and outlet connector 222. The gas connector 222 descends, causing the peripheral wall of the expanding ball 232 to abut against the inner wall of the rubber nozzle 233. This expands the tapered portion at the lower end of the rubber nozzle 233, causing the outer wall of the rubber nozzle 233, located inside the interface of the gas meter housing 5, to abut against the inner wall of the interface of the gas meter housing 5. This increases the contact area between the rubber nozzle 233 and the inner wall of the interface of the gas meter housing 5, thereby improving the sealing performance between the rubber nozzle 233 and the interface of the gas meter housing 5. At the same time, since the outer wall of the expanding ball 232 abuts against the inner wall of the rubber nozzle 233, the sealing performance between the expanding ball 232 and the rubber nozzle 233 is also maintained, allowing air from an external gas source to smoothly enter the gas meter housing 5.

[0056] Furthermore, while the pressure plate 212 drives the expansion ball 232 to descend, the expansion ball 232 also drives the guide block 236 to descend to the top rod 238 via the guide rod 2321. This causes the lower end of the guide block 236 to contact the end of the top rod 238, thereby pushing the top rod 238 away from the mounting tube 231. This causes the top rod 238 to compress the positioning spring 239 and push the upper end of the clamping rod 2310 to rotate away from the mounting tube 231. Consequently, the lower end of the clamping rod 2310 rotates towards the rubber nozzle 233 and contacts the outer wall of the interface of the gas meter housing 5, thereby further positioning the gas meter housing 5. This reduces the shaking of the gas meter housing 5 when it is submerged in water, which would affect the sealing between the gas meter housing 5 and the rubber nozzle 233.

[0057] Subsequently, the lifting motor 321 drives the lifting screw 322 to rotate, causing the lifting screw 322 to move the lifting plate 323 upward. This, in turn, causes the lifting plate 323 to move the immersion tank 31 upward, immersing the gas meter housing 5 in water stored in the immersion tank 31 until the water level reaches the upper interface of the gas meter housing 5. Next, the drive motor 421 drives one of the drive sprockets 423 to rotate, causing the drive sprocket 423 to drive the other drive sprockets 423 to rotate via the drive chain 422. This causes the cleaning brush 41 on the drive chain 422 to move along with the drive chain 422, moving the brush bristles of the cleaning brush 41 around the joint of the gas meter housing 5, thus removing air bubbles from the joint of the gas meter housing 5. This reduces the number of air bubbles that adhere to the joint of the gas meter housing 5 when it is first submerged in water, thus reducing the impact on subsequent water tightness testing of the gas meter housing 5.

[0058] Finally, air is introduced into the gas meter housing 5 through the air inlet connector 221 by an external air source, and discharged from the gas meter housing 5 through the air outlet connector 222. It is observed whether air bubbles appear at the splicing position of the gas meter housing 5. If no air bubbles appear, it is determined that the water tightness of the gas meter housing 5 is good; if air bubbles appear, it is determined that the water tightness of the gas meter housing 5 is poor, thereby realizing the detection of the gas meter housing 5.

[0059] After the test is completed, the immersion tank 31 is lowered to remove the gas meter housing 5 from the water. Then, the pressure plate 212 is moved upward by the clamping cylinder 213, which in turn moves the inlet connector 221 and outlet connector 222 upward, thereby moving the expansion ball 232 upward and separating it from the rubber nozzle 233. At the same time, the expansion ball 232, through the guide rod 2321, moves the guide block 236 away from the top rod 238, causing the upper end of the clamping rod 2310 to rotate and reset towards the mounting tube 231 under the action of the positioning spring 239. This resets the top rod 238, causing the lower end of the clamping rod 2310 to separate from the outer wall of the interface of the gas meter housing 5. Then, as the pressure plate 212 continues to rise, it drives the mounting plate 234 to move upward, causing the mounting plate 234 to drive the mounting tube 231 to rise. This causes the mounting tube 231 to drive the rubber nozzle 233 to move upward, separating the rubber nozzle 233 from the interface of the gas meter housing 5, thereby releasing the positioning of the upper end of the gas meter housing 5. Finally, by lifting the gas meter housing 5, it disengages from the top plate 255, causing the top plate 255 to move upward under the action of the clamping spring 253. This causes the upper ends of the first clamping block 251 and the second clamping block 252 to rotate away from the gas meter housing 5, thereby releasing the gas meter housing 5 and achieving its disassembly.

[0060] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be included within the scope of protection of this application.

Claims

1. An ultrasonic gas meter water tightness testing device, comprising a housing (1), characterized in that: The housing (1) is equipped with a testing device for detecting the water tightness of the gas meter housing (5). The testing device includes an immersion mechanism (3), a gas circulation mechanism (2), and a cleaning mechanism (4). The gas circulation mechanism (2) includes an inflation component (22) and a support component (21). The support component (21) is installed at the upper end of the housing (1), and the inflation component (22) is installed on the support component (21). The support component (21) is used to position the gas meter housing (5). The inflation component (22) is used to inflate the gas meter housing (5). The immersion mechanism (3) is installed on the housing (1) and located below the gas circulation mechanism (2). The immersion mechanism (3) is used to position the gas meter housing (5) on the support component (21). The gas meter housing (5) on the submerged gas meter is submerged in water. The cleaning mechanism (4) includes a cleaning brush (41) and a drive assembly (42). The drive assembly (42) is mounted on the submerged mechanism (3). The cleaning brush (41) is mounted on the drive assembly (42). The cleaning brush (41) is used to remove air bubbles from the submerged gas meter housing (5). The support assembly (21) includes a support rod (211), a pressure plate (212), and a pressing cylinder (213). The pressing cylinder (213) is mounted on the housing (1), and the piston rod of the pressing cylinder (213) extends downward. The pressure plate (212) is mounted on the piston rod of the pressing cylinder (213). The inflation assembly (22) is mounted on the pressure plate (211). 12) The support rod (211) is L-shaped. The vertical section of the support rod (211) is installed on the side wall of the pressing cylinder (213), and one end of the vertical section of the support rod (211) extends downward. The horizontal section of the support rod (211) extends towards the pressing cylinder (213), and the horizontal section of the support rod (211) and the pressing plate are used to accommodate the gas meter housing (5). The gas filling assembly (22) includes an inlet connector (221) and an outlet connector (222). The inlet connector (221) is installed at one end of the pressure plate (212), and the outlet connector (222) is installed at the other end of the pressure plate (212). The inlet connector (221) and the outlet connector (222) are respectively connected by a pipe. The gas flow path is connected to an external gas source. The gas meter housing (5) is placed on the horizontal section of the support rod (211), so that the two interfaces at the upper end of the gas meter housing (5) are aligned with the inlet connector (221) and outlet connector (222) on the pressure plate (212), respectively. The inlet connector (221) and outlet connector (222) are respectively used to insert into the interfaces on the gas meter housing (5). The gas circulation mechanism (2) also includes an inlet sealing assembly (23) and an outlet sealing assembly (24). The inlet sealing assembly (23) is installed on the inlet connector (221), and the outlet sealing assembly (24) is installed on the outlet connector (222). The inlet sealing assembly (23) and the outlet sealing assembly (24) have the same structure.Both the intake sealing assembly (23) and the exhaust sealing assembly (24) include a support member. A mounting plate (234) is slidably mounted on the bottom wall of the pressure plate (212), and a buffer spring (235) is mounted on the mounting plate (234). One end of the buffer spring (235) is connected to the mounting plate (234), and the other end is connected to the pressure plate (212). The support member includes a mounting tube (231), a support ball (232), and a rubber nozzle (233). The mounting tube (231) is sleeved on the intake connector (221), and the upper end of the mounting tube (231) is connected to the mounting plate (234). A gap is left between the mounting tube (231) and the intake connector (221). The rubber nozzle (233) is inverted conical. The rubber nozzle (233) is installed at the lower end of the mounting pipe (231), and there is a gap between the rubber nozzle (233) and the air inlet connector (221). The rubber nozzle (233) is used to be inserted into the connector of the gas meter housing (5). The expansion ball (232) is installed at the lower end of the air inlet connector (221) and located between the rubber nozzle (233) and the air inlet connector (221). The peripheral sidewall of the expansion ball (232) is used to squeeze the inner wall of the rubber nozzle (233) near the air inlet connector (221). The air inlet sealing assembly (23) and the air outlet sealing assembly (24) both include positioning elements. Two sets of positioning elements are provided. The two sets of positioning elements are symmetrically arranged on both sides of the axis of the mounting pipe (231). On the wall, the positioning component includes a mounting rod (237), a top rod (238), a positioning spring (239), and a clamping rod (2310). The mounting rod (237) is mounted on the side wall of the mounting tube (231). The top rod (238) is mounted on the mounting rod (237) in a direction perpendicular to the axis of the mounting tube (231), and one end of the top rod (238) passes through the side wall of the mounting tube (231) and extends into the gap between the mounting tube (231) and the air inlet connector (221). The end of the top rod (238) near the air inlet connector (221) is used to connect with the expansion ball (232). The clamping rod (2310) is rotatably mounted on the end of the mounting rod (237) away from the mounting tube (231). One end of the clamping rod (2310) extends downward to the rubber nozzle (233), and the lower end of the clamping rod (2310) is used to abut against the outer wall of the gas meter housing (5) located at the air inlet, thereby further reducing the shaking of the gas meter housing (5). The side wall of the upper end of the clamping rod (2310) is slidably connected to the end of the top rod (238) away from the mounting tube (231). The positioning spring (239) is mounted on the top rod (238), and one end of the positioning spring (239) abuts against the side wall of the clamping rod (2310), and the other end is connected to the mounting rod (237). A guide rod is installed on the top wall of the expanding ball (232). The guide rod extends upward along the axis of the air inlet connector (221), and a guide block (236) is installed on the upper end of the guide rod.The guide block (236) has an abutting slope at one end near the guide rod, which is used to abut against the top rod (238). The gas circulation mechanism (2) also includes a clamping assembly (25), which includes a first clamping block (251), a second clamping block (252), and a clamping spring (253). A support plate (254) is also installed on the support rod (211). The first clamping block (251) and the second clamping block (252) are both installed on the support plate (254), and there is space between the first clamping block (251) and the second clamping block (252) for placing the gas meter housing (5). One end of the first clamping block (251) extends upward. The other end extends obliquely towards the second clamping block (252). One end of the second clamping block (252) extends upward, and the other end extends obliquely towards the first clamping block (251). A top plate (255) is also installed on the support plate (254), and the top plate (255) is located above the ends of the first clamping block (251) and the second clamping block (252) near the support plate (254). The top plate (255) is used to abut against the lower ends of the first clamping block (251) and the second clamping block (252). The clamping spring (253) is installed on the top plate (255), and one end of the clamping spring (253) is also connected to the support plate (254).

2. The ultrasonic gas meter water tightness testing device according to claim 1, characterized in that: The drive assembly (42) includes a drive motor (421), a drive chain (422), and drive sprockets (423). There are several drive sprockets (423), and all of the drive sprockets (423) are rotatably mounted in the immersion mechanism (3). The drive sprockets (423) are arranged along the periphery of the gas meter housing (5). The drive motor (421) is also mounted on the immersion mechanism (3), and the output shaft of the drive motor (421) is connected to one of the drive sprockets (423). The drive chain (422) is wound around the drive sprockets (423), and the cleaning brush (41) is mounted on the drive chain (422).

3. The ultrasonic gas meter water tightness testing device according to claim 1, characterized in that: The immersion mechanism (3) includes an immersion tank (31) and a lifting assembly (32). The lifting assembly (32) includes a lifting motor (321), a lifting screw (322), and a lifting plate (323). The lifting screw (322) is installed vertically on the housing (1). The lifting motor (321) and the lifting plate (323) are also installed on the housing (1). The output shaft of the lifting motor (321) is connected to one end of the lifting screw (322). The lifting plate (323) is threadedly connected to the lifting screw (322). The immersion tank (31) is installed on the lifting plate (323). The immersion tank (31) is used to store water and to store a gas meter housing (5).

4. The ultrasonic gas meter water tightness testing device according to claim 1, characterized in that: The gas circulation mechanism (2) and the cleaning mechanism (4) are provided in multiple sets.

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