A gas meter air tightness detection device

Abstract

The utility model relates to a kind of gas meter air tightness detection device, comprising: water tank, translation mechanism, aeration mechanism, elastic support mechanism.The device water tank is divided into two water tanks by partition, translation mechanism and aeration mechanism are set in the lower of detection frame, gas meter is alternately placed in two water tanks to carry out air tightness detection, when left water tank gas meter air tightness detection is completed, re-place the gas meter to be detected, while translation mechanism will aeration mechanism be translated to the above right water tank, carry out air tightness detection to gas meter in right water tank, after detection, re-place the gas meter to be detected in right water tank, then translation mechanism will aeration mechanism be translated to the above left water tank, water flowability in left water tank is smaller at this time, water surface has tended to be stable, carry out air tightness detection to gas meter in left water tank at this time, and detection personnel is easier to observe the situation that bubble generates in water, so it improves the accuracy of gas meter air tightness detection.

Description

Technical Field

[0001] This utility model belongs to the field of gas meter testing, and specifically relates to a gas meter airtightness testing device. Background Technology

[0002] A gas meter is a metering device installed on a gas pipeline to accurately measure and record the amount of gas used by a user. It accumulates gas consumption in real time through internal mechanical or electronic structures, providing gas companies with a basis for billing, and also helping users understand their gas usage and achieve rational energy consumption. During the manufacturing process, gas meters undergo airtightness testing to prevent gas leaks during user operation.

[0003] CN220270707U discloses a gas meter airtightness testing sealing mechanism, including a testing platform. Multiple hydraulic cylinders are fixedly connected to the lower surface of the testing platform. A water tank is fixedly connected to the telescopic end of each hydraulic cylinder. A moving component is fixedly installed on the left end of the upper side of the testing platform. The moving component includes a drive motor. A first gear is fixedly connected to the outer side of the drive motor's output shaft. A second gear is meshed with the first gear. A threaded rod is fixedly sleeved on the inner side of the second gear. A sleeve is sleeved on the lower outer wall of the threaded rod. A threaded cylinder is threadedly connected between the threaded rod and the sleeve.

[0004] CN218511956U discloses a water tightness testing device for a diaphragm gas meter, comprising a device body, a testing water tank, a lifting drive component, a three-way air inlet pipe, and an air inlet / outlet connector. The air inlet / outlet connector is connected to a gas supply device via the three-way air inlet pipe and is mounted on the lifting drive component. The device body also includes a movable base, an elimination rod mounted on the movable base, a horizontal movement drive component, a support base mounted on the horizontal movement drive component, and a vertical movement drive component. The output end of the horizontal movement drive component is connected to the movable base, and the output end of the vertical movement drive component is connected to the support base.

[0005] Current gas meter airtightness testing methods involve immersing the gas meter in water and pressurizing it with air, then observing for air bubbles in the water to determine airtightness. However, in actual gas meter airtightness testing, actions such as removing the tested gas meter from the water or immersing the meter to be tested cause significant water flow, making it difficult to observe air bubbles and leading to inaccurate airtightness tests. Utility Model Content

[0006] The technical problem this invention aims to solve is that in the existing gas meter airtightness testing process, operations such as removing the tested gas meter from the water or immersing the gas meter to be tested in the water cause significant water flow, making it difficult to observe air bubbles in the water, thus leading to inaccurate gas meter airtightness testing. Therefore, this invention provides a gas meter airtightness testing device.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model provides a gas meter airtightness testing device, which includes a water tank, a translation mechanism, an air filling mechanism, and an elastic support mechanism, wherein... The water tank has an internal partition that divides the internal cavity into two non-communicating water tanks. The partition abuts against the front and rear side walls of the water tank, ensuring that the two water tanks are not connected. The water tank has no top cover. Inside each water tank, a support platform for placing a gas meter is installed via a flexible support mechanism. A testing frame, preferably inverted U-shaped, is installed above the water tank. The two side walls (i.e., the two side frames) of the testing frame are fixedly connected to the two side walls of the water tank. A first push rod, preferably an electric push rod, is installed below the testing frame via a translation mechanism. The first push rod can be translated via the translation mechanism. A pressure plate is installed at the telescopic end of the first push rod, which can drive the pressure plate to rise or fall. Both sides of the upper surface of the pressure plate are equipped with inflation mechanisms, used to inflate the gas meter's inlet and outlet pipes when the first push rod is translated to a position above the gas meter and drives the pressure plate to fall onto the gas meter's inlet and outlet pipes. Through an elastic support mechanism, the pressure plate, driven by the first push rod, lowers the support platform on which the gas meter is placed, allowing the entire gas meter to be submerged in water. Air is then inflated into the gas meter's inlet and outlet pipes for airtightness testing. After the test, the first push rod drives the pressure plate to rise, and under the action of the elastic support mechanism, simultaneously raises the gas meter, exposing the gas meter's inlet and outlet pipes above the water surface.

[0008] Furthermore, the translation mechanism may include a limiting rod, a drive block, a threaded rod, and a motor. Two limiting rods are installed spaced apart between the two side walls of the testing frame. The threaded rod is located between the two limiting rods. The two limiting rods pass through the drive block and are slidably connected to it to limit the drive block and prevent it from rotating. The threaded rod passes through the drive block and is threadedly connected to it. A motor is installed on one side wall of the testing frame. The output shaft of the motor passes through the side wall of the testing frame and is connected to the threaded rod. When the motor is started, the output shaft of the motor drives the threaded rod to rotate. Since the limiting rods limit the drive block, the rotation of the threaded rod, under the action of the threaded connection, drives the drive block to move horizontally along the length direction of the threaded rod and the limiting rod.

[0009] Further, the inflation mechanism may include two cylinders mounted on both sides above the pressure plate, two piston rods movable inside the two cylinders, two inflation pipes communicating with the interior of the two cylinders and passing through the pressure plate, two mounting brackets on both sides of the upper surface of the pressure plate, and two second push rods mounted on the upper surfaces of the two mounting brackets. The telescopic ends of the second push rods are connected to the piston rods. The mounting brackets are used to position and mount the second push rods and the piston rods extending from the cylinders. They are preferably inverted L-shaped, with the vertical part of the inverted L-shape connected to the upper surface of the pressure plate. Two second push rods are mounted on both sides of the bottom of the drive block, for a total of two second push rods. The second push rods are preferably electric push rods. The telescopic ends of the second push rods pass through the horizontal part of the mounting bracket and extend downward to connect with the top of the piston rod inside the cylinder. That is, the telescopic ends of the second push rods can move up and down within the holes opened in the horizontal part of the mounting bracket. The cylinders are positioned above the pressure plate, preferably with the bottom of the cylinders not in contact with the pressure plate. An inflation pipe is mounted on the bottom of each cylinder, and the inflation pipe passes through the pressure plate. The charging tube extends downwards, beyond the bottom of the pressure plate by a certain distance. The length and diameter of the charging tube beyond the bottom of the pressure plate are suitable for insertion into the inlet and outlet of the gas meter. A piston body is installed at the end of the piston rod, and the piston body is located inside the cylinder. When the first push rod drives the pressure plate to press against the inlet and outlet pipes of the gas meter, the ends of the two charging tubes can be inserted into the inlet and outlet pipes of the gas meter respectively. At this time, the second push rod is activated, and the telescopic end of the second push rod moves downwards (i.e., extends outwards), thereby pushing the piston body at the end of the piston rod to slide downwards inside the cylinder, thereby injecting the air inside the cylinder into the gas meter through the charging tube, achieving the purpose of charging and pressurizing.

[0010] Furthermore, the elastic support mechanism includes two guide rods installed inside the water tank. Slider blocks are slidably mounted on the outer surfaces of both guide rods, and the two sliders are respectively connected to the two sides of the support platform. Springs are sleeved on the outer surfaces of the guide rods, with both ends of the springs abutting against the bottom wall of the water tank and the sliders, respectively. A stop block is installed at the top of the guide rod to prevent the slider from detaching from the guide rod. Preferably, the guide rods are symmetrically arranged on both sides of the support platform. The bottom of the guide rod is fixedly mounted on the bottom of the water tank, and a spring is sleeved on the outside of the guide rod. The bottom end of the spring is connected to the inner wall of the bottom of the water tank, and the top end is connected to a slider that passes through the guide rod. The slider can slide up and down along the guide rod. The side wall of the slider is fixedly connected to the side wall of the adjacent support platform, and a stop block is fixedly installed at the top of the guide rod to limit the slider's movement.

[0011] The spring force applies an upward force to the slider. When the gas meter is placed on the support platform, its inlet and outlet pipes are above the water surface. Then, when the gas meter is subjected to the pressure of the pressure plate, it can drive the support platform to move downward and compress the spring of the slider. At this time, the gas meter is completely submerged in the water. When the first electric push rod drives the pressure plate to rise, the compressed spring releases its elastic force, pushes the support platform to rise and move, and keeps the inlet and outlet of the gas meter against the lower surface of the pressure plate to prevent water from entering.

[0012] Furthermore, the support platform has an inverted triangular cross-section. This inverted triangular shape reduces resistance and interference with the water as the platform descends in the water, decreases water flow, and facilitates the observation of air bubbles.

[0013] Furthermore, the device also includes a support base, which is installed on the bottom wall of the water tank and positioned below the support platform. The top of the support base has a groove that matches the shape of the bottom of the support platform, for example, matching the inverted triangle shape of the support platform. When the pressure plate lowers the gas meter, the bottom of the support platform rests on the support base, at which point the pressure plate can press the inlet and outlet pipes of the gas meter tightly, improving the sealing performance.

[0014] Furthermore, the device also includes a positioning frame for positioning the gas meter. The positioning frame is installed on the top of the support platform. The length and width of the positioning frame are adapted to the corresponding length and width of the gas meter, and the height is generally lower than the height of the gas meter. Preferably, the size of the positioning frame is just enough to accommodate the gas meter, so that when the gas meter is placed in the positioning frame, the ends of the two gas filling tubes can be inserted into the inlet and outlet tubes of the gas meter when the first push rod drives the pressure plate to press on the gas meter.

[0015] In another preferred embodiment, the device further includes a drain pipe for draining water. The drain pipe is installed at the bottom or lower part of the water tank and is equipped with a valve for controlling the drainage. Preferably, drain pipes are installed on both sides along the length of the water tank. The drain pipes allow the water to be replaced when there are many impurities in the water that affect the observation of bubbles.

[0016] In another preferred embodiment, a rubber pad is installed on the lower surface of the pressure plate to improve the sealing between the pressure plate and the gas meter inlet and outlet pipes, thus preventing gas leakage.

[0017] In this application, the electric linear actuator is a known device in the art, which is an electric drive device that converts the rotational motion of an electric motor into the linear reciprocating motion of a linear actuator.

[0018] When a gas meter needs to be tested for air tightness, an appropriate amount of water is poured into two water tanks. The gas meter to be tested is placed on the support platform, with the gas meter's inlet and outlet pipes above the water surface. The first push rod is activated, and its telescopic end moves downward, causing the pressure plate to descend and press against the gas meter's inlet and outlet pipes. Through the elastic support mechanism, the support platform moves downward, pressing the entire gas meter into the water. Then, air is injected into the gas meter's inlet and outlet pipes through the inflation mechanism, increasing the internal pressure of the gas meter. At this point, the purpose of air tightness testing can be achieved by observing whether there are air bubbles in the water. If air bubbles are produced, it indicates that the gas meter's air tightness is unqualified; otherwise, it indicates that the gas meter's air tightness is qualified. After the test is completed, the first electric push rod drives the pressure plate to rise, and under the action of the elastic support mechanism, it drives the gas meter to rise simultaneously, causing the gas meter's inlet and outlet pipes to emerge from the water surface. Therefore, the air tightness of the connection between the inlet and outlet pipes can be tested, while also preventing water from entering the gas meter from the inlet and outlet pipes.

[0019] Furthermore, while the gas meter is being tested, the inspector can remove and place the gas meter in another water tank. This operation will cause significant fluctuations in the water. Since the previous gas meter is being tested, the water in the tank where the gas meter was placed will stabilize during this interval. Then, the inflation mechanism is moved horizontally above the other water tank by the translation mechanism to conduct the airtightness test. By using the two water tanks alternately, the water flow can be reduced during the airtightness test, allowing the inspector to better observe the bubbles and improve the accuracy of the test.

[0020] The method of using and working process of the gas meter air tightness testing device of this utility model is as follows: When it is necessary to test the air tightness of the gas meter, inject an appropriate amount of water into the two water tanks, first place the gas meter to be tested on the carrier, and then start the first push rod. The telescopic end of the first push rod moves downward, causing the pressure plate to drop. The pressure plate drops, causing the carrier to move downward. The carrier moves downward, driving the slider to slide downward along the guide rod. The slider slides downward, thereby compressing the spring, so that the bottom of the carrier is embedded in the cavity opened at the top of the support seat, thereby making the gas meter completely submerged in water. When the first push rod drives the pressure plate to press against the gas meter's inlet and outlet pipes, the bottom of the charging pipe can be inserted into the gas meter's inlet and outlet pipes. Then, air is charged into the gas meter's inlet and outlet pipes through the charging mechanism, increasing the internal pressure of the gas meter. This activates the second push rod, whose telescopic end moves downward, pushing the piston at the end of the piston rod to slide downward inside the cylinder. This injects air from inside the cylinder into the gas meter through the charging pipe. At this point, the gas meter's airtightness can be tested by observing whether there are air bubbles in the water. If air bubbles are produced, the gas meter's airtightness is unqualified; otherwise, it is qualified. After the gas meter's airtightness test is completed, the telescopic end of the first push rod moves upward, causing the pressure plate to rise. The compressed spring rebounds under the action of elastic force, causing the slider to slide upward along the guide rod, pushing the carrier upward, thus lifting the gas meter's inlet and outlet pipes out of the water surface.

[0021] This utility model has the following beneficial effects: (1) The gas meter air tightness testing device of this utility model, the water tank body is divided into two water tanks by a partition, and a translation mechanism and an air filling mechanism are set below the testing frame. Gas meters are alternately placed in the two water tanks for air tightness testing. When the gas meter in the left water tank is tested for air tightness, the gas meter to be tested is placed back. At the same time, the translation mechanism on the testing frame moves the air filling mechanism to the top of the right water tank to test the gas meter in the right water tank. After the test is completed, the gas meter to be tested is placed back in the right water tank. Then the translation mechanism on the testing frame moves the air filling mechanism to the top of the left water tank. At this time, the water in the left water tank has a smaller flow and the water surface has become more stable. At this time, the gas meter in the left water tank is tested for air tightness. The tester can more easily observe the generation of bubbles in the water, thus improving the accuracy of the gas meter air tightness test. (2) In the gas meter air tightness testing device of this utility model, the carrier is bucket-shaped and the longitudinal section is an inverted triangle. Designing the longitudinal section of the carrier as an inverted triangle can reduce the resistance encountered by the carrier when it descends in the water, and reduce the interference of the carrier's descent on the water in the tank, reduce the water flow in the tank, make the water surface more stable, and thus facilitate the observation of air bubbles in the water, thereby improving the accuracy of gas meter air tightness testing; (3) The gas meter air tightness testing device of this utility model, by setting an elastic support mechanism, allows the gas meter's inlet and outlet pipes to be placed on the water surface when the gas meter is placed. When the air tightness test is to be performed, the gas meter is then pressed into the water. This not only allows for the air tightness test of the connection between the inlet and outlet pipes, but also avoids the problem of water entering the gas meter from the inlet and outlet pipes. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of the gas meter airtightness testing device of this utility model; Figure 2 This is a schematic diagram of the translation mechanism in the gas meter airtightness testing device of this utility model; Figure 3 This is a schematic diagram of the elastic support mechanism in the gas meter airtightness testing device of this utility model; Figure 4 This is a schematic diagram of the gas filling mechanism in the gas meter airtightness testing device of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the support platform and the support base in the gas meter airtightness testing device of this utility model. Among them, 100 is the water tank, 101 is the partition, 103 is the testing frame, 104 is the first push rod, 105 is the pressure plate, and 106 is the support platform. 200. Translation mechanism; 201. Limiting rod; 202. Drive block; 203. Threaded rod; 204. Motor. 300. Inflation mechanism; 301. Inflation pipe; 302. Cylinder; 303. Piston rod; 304. Mounting bracket; 305. Second push rod. 400. Elastic support mechanism; 401. Guide rod; 402. Slider; 403. Spring; 404. Stop. 500, Positioning frame, 600. Support base 700. Drain pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the components are connected to each other and their relative positional relationship remains unchanged after connection. The terms "installation," "equipped with," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. The term "connection" can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "middle," "outer," "inner," "lower," "around," "left," "right," "front," "rear," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] like Figures 1-5 As shown, the gas meter airtightness testing device of this utility model includes a water tank 100, a translation mechanism 200, an air filling mechanism 300, and an elastic support mechanism 400, wherein... The water tank 100 has a partition 101 in the middle to divide its internal cavity into two non-communicating water tanks 102. The partition 101 abuts against the front and rear side walls of the water tank 100, ensuring that the two water tanks 102 are not connected. The water tank 100 has no top cover. Each water tank 102 has a support platform 106 for placing a gas meter installed inside via an elastic support mechanism 400. An inverted U-shaped detection frame 103 is installed above the water tank 100. The two side walls (i.e., the two side frames) of the detection frame 103 are fixedly connected to the two side walls of the water tank 100. A first push rod 104 is installed below the detection frame 103 via a translation mechanism 200. The first push rod 104 is preferably an electric push rod. The first push rod can be translated by the translation mechanism 200. A pressure plate 105 is installed at the end of the telescopic end of the first push rod 104. The first push rod can drive the pressure plate 105 to rise or fall. Both sides of the upper surface of the pressure plate 105 are provided with an inflation mechanism 300, which is used to inflate the gas meter's inlet and outlet pipes when the first push rod is translated to the position above the gas meter via the translation mechanism and drives the pressure plate to fall and press against the gas meter's inlet and outlet pipes.

[0027] The translation mechanism 200 may include a limiting rod 201, a drive block 202, a threaded rod 203, and a motor 204. Two limiting rods 201 are spaced apart between the two side walls of the detection frame 103. The threaded rod 203 is located between the two limiting rods 201. The two limiting rods 201 pass through the drive block 202 and are slidably connected to it to limit the drive block 202 and prevent it from rotating. The threaded rod 203 passes through the drive block 202 and is threadedly connected to it. A motor 204 is installed on one side wall of the detection frame 103. The output shaft of the motor 204 passes through the side wall of the detection frame 103 and is connected to the threaded rod 203. When the motor 204 is started, the output shaft of the motor 204 drives the threaded rod 203 to rotate. Since the limiting rod 201 limits the drive block 202, the threaded rod 203 can rotate and drive the drive block 202 to move horizontally along the length direction of the threaded rod 203 and the limiting rod 201 under the action of the threaded connection.

[0028] The inflation mechanism 300 may include two cylinders 302 installed on both sides above the pressure plate 105, two piston rods 303 that can move inside the two cylinders 302 respectively, two inflation pipes 301 that communicate with the inside of the two cylinders and pass through the pressure plate, two mounting brackets 304 provided on both sides of the upper surface of the pressure plate, and two second push rods 305 installed on the upper surface of the two mounting brackets respectively, with the end of the extension end of the second push rod 305 connected to the piston rod 303. Mounting bracket 304 provides a mounting position for the second push rod 305, which moves up and down with the pressure plate 105. Mounting bracket 304 is used to position and mount the second push rod 305 and the piston rod 303 extending from the cylinder. It is preferably inverted L-shaped, with the vertical part of the inverted L-shape connected to the upper surface of the pressure plate 105. The bottom sides of the drive block 202 are respectively equipped with the second push rod 305, for a total of two second push rods 305. The second push rod 305 is preferably an electric push rod. The telescopic end of the second push rod 305 passes through the horizontal part of the mounting bracket 304 and extends downward to connect with the top of the piston rod 303 inside the cylinder 302. That is, the telescopic end of the second push rod 305 can move up and down in the hole opened in the horizontal part of the mounting bracket 304. The cylinder 302 is set above the pressure plate 105, and preferably the bottom of the cylinder 302 does not contact the pressure plate 105. Each cylinder 302 has an inflation tube 301 installed at its bottom. The inflation tube 301 passes through the pressure plate 105 and extends downwards, exceeding the bottom of the pressure plate by a certain distance. The length of the inflation tube beyond the bottom of the pressure plate and the diameter of the inflation tube are suitable for insertion into the inlet and outlet of the gas meter. A piston body is installed at the end of the piston rod 303, and the piston body is located inside the cylinder 302. When the first push rod 104 drives the pressure plate 105 to press against the inlet and outlet pipes of the gas meter, the ends of the two inflation tubes 301 can be inserted into the inlet and outlet pipes of the gas meter respectively. At this time, the second push rod 305 is activated, and the telescopic end of the second push rod 305 moves downwards (i.e., extends outwards), thereby pushing the piston body at the end of the piston rod 303 to slide downwards inside the cylinder 302, thereby injecting the air inside the cylinder 302 into the gas meter through the inflation tube 301, achieving the purpose of inflation and pressurization.

[0029] The elastic support mechanism 400 includes two guide rods 401 installed inside the water tank 102. Slider 402 is slidably mounted on the outer surface of each guide rod 401, and the two sliders 402 are respectively connected to the two sides of the support platform 106. A spring 403 is sleeved on the outer surface of the guide rod 401. The two ends of the spring 403 abut against the bottom wall of the water tank 102 and the slider 402 respectively. A stop block 404 is installed on the top of the guide rod 401 to prevent the slider from falling off the guide rod. Preferably, the guide rods 401 are symmetrically arranged on both sides of the support platform 106. The bottom of the guide rods 401 is fixedly installed on the bottom of the water tank 100. A spring 403 is sleeved on the outside of the guide rods 401. The bottom end of the spring 403 is connected to the inner wall of the bottom of the water tank 100, and the top end is connected to a slider 402 that passes through the guide rods 401. The slider 402 can slide up and down along the guide rods 401. The side wall of the slider 402 is fixedly connected to the side wall of the adjacent support platform 106. A stop block 404 that limits the slider 402 is fixedly installed on the top of the guide rods 401.

[0030] The spring 403 exerts an upward force on the slider 402. When the gas meter is placed on the support platform 106, its inlet and outlet pipes are positioned above the water surface. When the gas meter is subjected to the pressure of the pressure plate 105, it can drive the support platform 106 to move downward and compress the spring 403. At this time, the gas meter is completely submerged in the water. When the first electric push rod 104 drives the pressure plate 105 to rise, the compressed spring 403 releases its elastic force, pushing the support platform 106 to rise and move, and ensuring that the inlet and outlet of the gas meter always press against the lower surface of the pressure plate 105 to prevent water from entering.

[0031] In a preferred embodiment, the support platform 106 has an inverted triangular cross-section. This inverted triangular shape reduces resistance and disturbance to the water as the platform 106 descends in water, decreasing water flow and facilitating bubble observation.

[0032] In another preferred embodiment, the device further includes a support base 600, which is fixedly installed on the bottom wall of the water tank 102. The support base 600 is located below the support platform 106, and the top of the support base 600 has a groove that matches the shape of the bottom of the support platform 106, for example, matching the inverted triangle of the support platform. When the pressure plate 105 lowers the gas meter, the bottom of the support platform 106 is supported on the support base 600. At this time, the pressure plate 105 can press the inlet and outlet pipes of the gas meter tightly, improving the sealing performance.

[0033] In another preferred embodiment, the device further includes a positioning frame 500 for positioning the gas meter. The positioning frame 500 is installed on the top of the support platform 106. The length and width of the positioning frame are adapted to the corresponding length and width of the gas meter, and the height is generally lower than the height of the gas meter. The size of the positioning frame is preferably just enough to accommodate the positioning gas meter, so that when the gas meter is placed in the positioning frame, the ends of the two gas filling tubes 301 can be inserted into the inlet and outlet tubes of the gas meter when the first push rod 104 drives the pressure plate 105 to press on the gas meter.

[0034] In another preferred embodiment, the device further includes a drain pipe 700 for draining water. The drain pipe 700 is installed at the bottom or lower part of the water tank 100, and a valve for controlling the draining is provided on the drain pipe 700. Preferably, drain pipes 700 are installed on both sides of the water tank 100 along its length. The drain pipes 700 allow the water to be replaced when there are many impurities in the water that affect the observation of bubbles.

[0035] In another preferred embodiment, a rubber pad is installed on the lower surface of the pressure plate 105 to improve the sealing between the pressure plate 105 and the gas meter inlet and outlet pipes, so as to prevent gas leakage.

[0036] In this application, the electric linear actuator is a known device in the art, which is an electric drive device that converts the rotational motion of an electric motor into the linear reciprocating motion of a linear actuator.

[0037] When a gas meter needs to be tested for air tightness, an appropriate amount of water is poured into the two water tanks 102. The gas meter to be tested is first placed on the support platform 106, with the gas meter's inlet and outlet pipes above the water surface. The first push rod 104 is activated, causing its telescopic end to move downwards, lowering the pressure plate 105 and pressing it onto the gas meter's inlet and outlet pipes. Through the elastic support mechanism 400, the support platform 106 moves downwards, pressing the entire gas meter into the water. Then, the inflation mechanism 300 inflates the gas meter's inlet and outlet pipes with air to increase its pressure. The internal pressure of the gas meter can be checked by observing whether there are air bubbles in the water. If air bubbles are produced, it means that the gas meter is not airtight. Conversely, if there are no air bubbles, it means that the gas meter is airtight. After the test is completed, the first electric push rod 104 drives the pressure plate 105 to rise. Under the action of the elastic support mechanism 400, the gas meter rises at the same time, so that the inlet and outlet pipes of the gas meter are exposed above the water surface. Therefore, the airtightness of the connection between the inlet and outlet pipes can be tested, while also preventing water from entering the gas meter from the inlet and outlet pipes.

[0038] Furthermore, while the gas meter is being tested, the testing personnel can remove or place the gas meter in another water tank 102. This operation will cause significant fluctuations in the water. Since the previous gas meter is being tested, the water in the water tank 102 where the gas meter was placed can stabilize during this interval. Then, the translation mechanism 200 drives the inflation mechanism 300 to move horizontally above the other water tank 102 for airtightness testing. By using the two water tanks 102 alternately, the flow of water can be reduced during the airtightness test of the gas meter, allowing the testing personnel to better observe the bubbles and improve the accuracy of the test.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A gas meter airtightness testing device, characterized in that, It includes a water tank (100), a translation mechanism (200), an inflation mechanism (300), and an elastic support mechanism (400), among which, The water tank (100) is provided with a partition (101) for dividing the internal cavity of the water tank (100) into two non-communicating water tanks (102). The water tank (100) has no top cover. Each water tank (102) has a support platform (106) for placing a gas meter installed inside through an elastic support mechanism (400). A testing frame (103) is installed above the water tank (100). A first push rod (104) is installed below the testing frame (103) via a translation mechanism (200). The first push rod (104) can be translated via the translation mechanism (200). A pressure plate (105) is installed at the end of the telescopic end of the first push rod (104). The first push rod can drive the pressure plate (105) to rise or fall. Both sides of the upper surface of the pressure plate (105) are provided with an air filling mechanism (300), which is used to fill the gas meter's inlet and outlet pipes with gas when the first push rod (104) is translated to the position above the gas meter via the translation mechanism (200) and drives the pressure plate (105) to fall and press on the gas meter's inlet and outlet pipes.

2. The gas meter airtightness testing device according to claim 1, characterized in that, The translation mechanism (200) includes a limiting rod (201), a drive block (202), a threaded rod (203), and a motor (204). Two limiting rods (201) are installed between the two side walls of the detection frame (103). The threaded rod (203) is located between the two limiting rods (201). The two limiting rods (201) pass through the drive block (202) and are slidably connected to it, used to limit the movement of the drive block (202). The threaded rod (203) passes through the drive block (204). 2) And it is threadedly connected to it. A motor (204) is installed on the side wall of the test frame (103). The output shaft of the motor (204) passes through the side wall of the test frame (103) and is connected to the threaded rod (203). When the motor (204) is started, the output shaft of the motor (204) drives the threaded rod (203) to rotate. The rotation of the threaded rod (203) drives the drive block (202) to move horizontally along the length direction of the threaded rod (203) and the limit rod (201).

3. The gas meter airtightness testing device according to claim 1 or 2, characterized in that, The inflation mechanism (300) includes two cylinders (302) installed on both sides above the pressure plate (105), piston rods (303) that can move inside the two cylinders (302), two inflation pipes (301) that communicate with the inside of the two cylinders and pass through the pressure plate (105), two mounting brackets (304) set on both sides of the upper surface of the pressure plate, and two second push rods (305) installed on the upper surface of each mounting bracket. The ends of the extension and retraction of the second push rods (305) are connected to the pistons. When the first push rod (104) drives the pressure plate (105) to press on the inlet and outlet pipes of the gas meter, the ends of the two charging pipes (301) can be inserted into the inlet and outlet pipes of the gas meter respectively. At this time, the second push rod (305) is activated. The telescopic end of the second push rod (305) moves downward, thereby pushing the piston body at the end of the piston rod (303) to slide downward inside the cylinder (302), thereby injecting the air inside the cylinder (302) into the gas meter through the charging pipe (301).

4. The gas meter airtightness testing device according to claim 3, characterized in that, The elastic support mechanism (400) includes two guide rods (401) installed inside the water tank (102). Slider (402) is slidably installed on the outer surface of the two guide rods (401), and the two sliders (402) are respectively connected to the two sides of the support platform (106). A spring (403) is sleeved on the outer surface of the guide rod (401). The two ends of the spring (403) abut against the bottom wall of the water tank (102) and the slider (402) respectively. A stop block (404) is installed on the top of the guide rod (401) to prevent the slider from falling off the guide rod.

5. The gas meter airtightness testing device according to claim 4, characterized in that, The cross-section of the support platform (106) is an inverted triangle.

6. The gas meter airtightness testing device according to claim 4, characterized in that, The device also includes a support base (600), which is installed on the bottom wall of the water tank (102) and located below the support platform (106). The top of the support base (600) has a groove that matches the shape of the bottom of the support platform (106).

7. The gas meter airtightness testing device according to claim 1, characterized in that, The device also includes a positioning frame (5) for positioning the gas meter, which is mounted on top of the support platform (106).

8. The gas meter airtightness testing device according to claim 1, characterized in that, The device also includes a drain pipe (7) for draining water, which is installed at the bottom or lower part of the water tank (100) and is equipped with a valve for controlling the draining.

9. The gas meter airtightness testing device according to claim 1, characterized in that, The lower surface of the pressure plate (105) is fitted with a rubber gasket to improve the sealing between the pressure plate (105) and the gas meter inlet and outlet pipes; and / or Both the first push rod (104) and the second push rod (305) are electric push rods.

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