A tool and method for measuring gas surface membrane volume

Abstract

The present invention discloses a tool and method for measuring the volume of a gas surface membrane. The tool comprises an operating table, on which a U-shaped measuring structure containing liquid is provided, and scale lines are provided on the outer wall of the U-shaped measuring structure. One end of the U-shaped measuring structure is connected to a pressurizing component for injecting gas into one side of the U-shaped measuring structure, and the other end of the U-shaped measuring structure is connected through an air pipe to a membrane pressure-maintaining structure for sealing and positioning the gas surface membrane and causing the gas surface membrane to swell when gas is introduced. The present invention assembles the pressurizing component, the U-shaped measuring structure, and the membrane pressure-maintaining structure into a closed space structure, installs the gas surface membrane in the membrane pressure-maintaining structure, pressurizes the liquid in the U-shaped measuring structure by the pressurizing component, and then drives the gas surface membrane to fully swell. The gas surface membrane volume is accurately calculated by the water displacement method, thereby achieving rapid and accurate detection of the gas surface membrane volume and improving the detection efficiency of the gas surface membrane.

Description

Technical Field

[0001] The present invention relates to the technical field of gas surface membrane detection, and more particularly to a tool and method for measuring the volume of a gas surface membrane. Background Art

[0002] The existing gas meter membrane consists of a leather cup and a strip of leather edge located on the edge of the leather cup that matches the groove shape on the edge of the gas meter lower shell. Currently, the leather cup and the leather edge are usually made of polyester silk fabric with good softness and low tensile tension as the skeleton, and then double-sided tape is added and vulcanized into one.

[0003] Whether the volume of a gas meter membrane meets the required requirements directly affects the meter's accuracy. Therefore, after the gas meter membrane is manufactured, its volume must be measured. However, calculating the membrane's volume directly from the measured dimensions is difficult, and the calculated volume is prone to significant discrepancies between the actual membrane. Measuring the membrane dimensions and subsequent calculations require significant manpower and time, resulting in low testing efficiency. Therefore, it is necessary to develop a tool that facilitates gas meter membrane volume measurement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a tool and method for measuring the volume of the gas surface membrane, so as to solve the problem that the method of directly calculating the volume of the membrane through the measured dimensions is time-consuming and labor-intensive, and the detection efficiency is low, and to achieve rapid and accurate detection of the gas surface membrane volume.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A tool for measuring the volume of a gas surface membrane comprises an operating table, on which is provided a U-shaped measuring structure filled with liquid, with scale lines provided on the outer wall of the U-shaped measuring structure, one end of the U-shaped measuring structure being connected to a pressurizing component for injecting gas into one side of the U-shaped measuring structure, and the other end of the U-shaped measuring structure being connected through an air pipe to a membrane pressure-maintaining structure for sealing and positioning the gas surface membrane and causing the gas surface membrane to bulge when gas is introduced.

[0007] To further optimize the technical solution, the membrane pressure maintaining structure includes a lower membrane box, the top of the lower membrane box is provided with a groove for positioning the gas surface membrane, the top edge of the gas surface membrane extends out from the groove, and there is a gap between the gas surface membrane and the groove to form a ventilation cavity connected to the air pipe; the upper cover of the lower membrane box is provided with an upper pressure plate, and a sealing ring is also provided between the upper pressure plate and the top edge of the gas surface membrane, and the upper pressure plate is provided with a locking positioning component for locking the upper pressure plate, the sealing ring and the top edge of the gas surface membrane to the lower membrane box.

[0008] To further optimize the technical solution, the side of the trachea is also connected to be provided with an inclined micromanometer for detecting the air pressure in the trachea and the membrane pressure maintaining structure.

[0009] To further optimize the technical solution, the U-shaped measuring structure includes a vertically arranged left transparent measuring cylinder, a vertically arranged right transparent measuring cylinder, and a PVC transparent hose connected between the left transparent measuring cylinder and the right transparent measuring cylinder. The top of the left transparent measuring cylinder and the top of the right transparent measuring cylinder are respectively sealed with a silicone test bottle stopper; the air tube sealing connection is set on the silicone test bottle stopper on the right side and is connected to the right transparent measuring cylinder.

[0010] To further optimize the technical solution, the pressurizing component includes an air pumping tube that is sealed and inserted into the silicone test bottle stopper and connected to the left transparent measuring cylinder, and an air pumping valve arranged at the end of the air pumping tube.

[0011] A method for measuring gas surface membrane volume, characterized in that the method is based on the above-mentioned gas surface membrane volume measuring tool and includes the following steps:

[0012] S1. Assemble the tooling, seal the gas surface membrane into the membrane pressure-maintaining structure, and record the liquid levels on the left and right sides of the U-shaped measuring structure in the initial state;

[0013] S2. Inject gas into the left end of the U-shaped measuring structure through the pressurizing component. The gas pushes the liquid inside the U-shaped measuring structure to flow toward the right end, and the gas at the right end of the U-shaped measuring structure is discharged into the membrane pressure-maintaining structure.

[0014] S3. Based on step S2, continue to inject gas into the left end of the U-shaped measuring structure through the pressurizing component until the gas surface membrane in the membrane pressure maintaining structure is completely inflated;

[0015] S4. Calculate the gas surface membrane volume by the liquid level difference on the left and right sides of the U-shaped measuring structure.

[0016] To further optimize the technical solution, in step S3, the step of determining whether the gas surface membrane is completely bulged is as follows: when it is found that the pressure value displayed by the inclined micromanometer rises sharply, it can be determined that the gas surface membrane is in a completely bulged state at this time.

[0017] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0018] The present invention assembles a pressurizing component, a U-shaped measuring structure and a membrane pressure maintaining structure into a closed space structure, installs the gas surface membrane in the membrane pressure maintaining structure, and pressurizes the liquid in the U-shaped measuring structure through the pressurizing component to drive the gas surface membrane to fully swell. The volume of the gas surface membrane is accurately calculated by the drainage method, and there is no need to measure the size of the gas surface membrane, thereby realizing rapid and accurate detection of the gas surface membrane volume, saving time and effort, and improving the detection efficiency of the gas surface membrane.

[0019] The present invention also has an inclined micromanometer connected to the side of the gas pipe. By observing whether the pressure value in the inclined micromanometer changes sharply, it can be judged whether the gas surface membrane is completely inflated, so that the staff can accurately and intuitively know whether the gas surface membrane is completely inflated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the gas surface membrane of the present invention when no gas is entering;

[0021] Figure 2 This is a schematic structural diagram of the gas surface membrane of the present invention when it is in a bulging state;

[0022] Figure 3 Schematic diagram of the structure of the lower membrane box in the membrane pressure-maintaining structure of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the upper pressure plate in the membrane pressure-maintaining structure of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the sealing ring in the membrane pressure-maintaining structure of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the tilting micromanometer of the present invention;

[0026] Figure 7 This is a schematic structural diagram of the silicone test bottle stopper of the present invention;

[0027] Figure 8 It is a cross-sectional view of the membrane pressure-maintaining structure of the present invention;

[0028] Figure 9 It is a structural schematic diagram of the U-shaped measurement structure of the present invention.

[0029] Among them: 1. Operating table, 2. U-shaped measuring structure, 21. Pipe clamp, 22. Left transparent measuring cylinder, 23. Right transparent measuring cylinder, 24. PVC transparent hose, 3. Air valve, 4. Silicone test bottle stopper, 5. Three-way connecting pipe, 6. Air pipe, 7. Inclined micromanometer, 8. Membrane pressure maintaining structure, 81. Lower membrane box, 82. Upper pressure plate, 83. Groove, 84. Sealing ring, 9. Gas surface membrane. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] A tool and method for measuring gas surface membrane volume, combined with Figures 1 to 9 As shown, it includes an operating table 1, a U-shaped measuring structure 2, a pressurizing component and a membrane pressure maintaining structure 8.

[0032] The operating table 1 is configured as a frame structure, with a positioning panel fixedly provided at the front. The operating table 1 is made of aluminum profiles and a stainless steel panel, and the bottom end of the operating table 1 is supported on the ground by support legs.

[0033] A U-shaped measuring structure 2 filled with liquid is provided on the operating table 1. Specifically, the U-shaped measuring structure 2 is clamped on the operating table 1 by a number of pipe clamps 21, and the left side, bottom end and right side of the U-shaped measuring structure 2 are clamped respectively by a plurality of clamping rings.

[0034] Scale lines are provided on the outer wall of the U-shaped measuring structure 2 , and the liquid level status in the U-shaped measuring structure 2 can be known through the scale lines.

[0035] The U-shaped measuring structure 2 includes a left transparent measuring cylinder 22, a right transparent measuring cylinder 23, and a PVC transparent hose 24. The left and right transparent measuring cylinders 22 and 23 are arranged vertically, respectively. The PVC transparent hose 24 is connected between the left and right transparent measuring cylinders 22 and 23. The tops of the left and right transparent measuring cylinders 22 and 23 are each sealed with a silicone test bottle stopper 4, each with a circular hole.

[0036] The left transparent graduated cylinder 22 and the right transparent graduated cylinder 23 are made of plastic, and both have a measuring range of 1000ML.

[0037] When making the U-shaped measuring structure 2, cut the bottoms of two 1000ML plastic transparent measuring cylinders, and use a PVC transparent hose to glue the cut measuring cylinders with 504 glue to ensure their airtightness.

[0038] One end of the U-shaped measuring structure 2 is connected to a pressurizing component for injecting gas into one side of the U-shaped measuring structure 2, and the other end of the U-shaped measuring structure 2 is connected to a membrane pressure maintaining structure 8. The membrane pressure maintaining structure 8 is used to seal and position the gas surface membrane 9 and make the gas surface membrane bulge when gas is introduced.

[0039] The membrane pressure-maintaining structure 8 is connected to the other end of the U-shaped measuring structure 2 through the air tube 6, which is sealed and connected to the silicone test bottle stopper 4 on the right side and is connected to the right transparent measuring cylinder 23. The diameter of the air tube 6 is 10 mm.

[0040] The membrane pressure-maintaining structure 8 includes a lower membrane box 81 , an upper pressure plate 82 , a sealing ring 84 and a locking and positioning assembly.

[0041] A groove 83 for positioning the gas surface membrane is provided at the top of the lower membrane box 81. The top edge of the gas surface membrane extends out from the groove 83. There is a gap between the gas surface membrane and the groove 83, forming a ventilation cavity connected to the air pipe 6. A vent is provided inside the groove 83, and the air pipe 6 is connected to the vent provided in the groove 83.

[0042] The upper cover of the lower membrane box 81 is provided with an upper pressure plate 82. A sealing ring 84 is provided between the upper pressure plate 82 and the top edge of the gas surface membrane. The upper pressure plate 82 is provided with a locking and positioning assembly for locking the upper pressure plate 82, sealing ring 84, and the top edge of the gas surface membrane to the lower membrane box 81. The locking and positioning assembly includes a stainless steel clamping tool lock.

[0043] When installing and positioning the gas surface membrane, place the gas surface membrane to be tested in the groove of the lower membrane box 81, and the edge of the gas surface membrane is placed flat on the platform of the lower membrane box 81; place the sealing ring on the edge of the gas surface membrane; use the upper pressure plate 82 and the stainless steel clamping tool lock to tighten the sealing ring to ensure that the gas surface membrane is placed in a sealed space, thereby simulating the movement of the gas surface membrane in the gas meter membrane box.

[0044] The pressurizing component includes an air pumping tube which is sealed and inserted on the silicone test bottle stopper 4 and is connected to the left transparent measuring cylinder 22 , and an air pumping valve 3 which is arranged at the end of the air pumping tube.

[0045] During the gas meter membrane volume test performed by this device, the bulging of the gas meter membrane within the membrane pressure-maintaining structure 8 must be manually determined by personnel, often resulting in an inability to accurately determine whether the gas meter membrane is fully bulged. To address this technical issue and allow personnel to accurately and intuitively determine whether the gas meter membrane is fully bulged, the present invention further provides an inclined micromanometer 7 connected to the side of the gas pipe 6. The inclined micromanometer 7 is used to detect the air pressure within the gas pipe and the membrane pressure-maintaining structure 8. Whether the gas meter membrane is fully bulged is determined by observing whether the pressure value within the inclined micromanometer 7 changes dramatically.

[0046] The inclined micromanometer 7 comprises a positioning plate, an indicator tube, and a storage chamber. The indicator tube and storage chamber are interconnected and positioned on the positioning plate. The indicator tube and storage chamber contain a red indicator fluid. The indicator tube is marked with pressure scale lines and is tilted. The right side of the indicator tube is connected to the trachea, while the left side is connected to the storage chamber. The storage chamber is located above the indicator tube and is open to the atmosphere.

[0047] The right side of the tilting micromanometer 7 is the positive pressure end (i.e., the point marked with a +). This is connected to the silicone test bottle stopper and the membrane pressure-maintaining structure on the right transparent graduated cylinder via a three-way connecting pipe 5. The left negative pressure end of the tilting micromanometer 7 (i.e., the point marked with a -) is connected to the atmosphere, requiring no connection to other components.

[0048] In practical applications, in order to prevent red oil from flowing out from the left end of the inclined micromanometer 7 to the outside, the present invention installs a hose at the left end of the inclined micromanometer 7 to connect to the atmosphere, thereby effectively preventing red oil from overflowing.

[0049] The measurement principle of the membrane volume tooling is: the volume contained by the gas surface membrane during one operation is equal to the change in the volume of the membrane pressure maintaining structure from the membrane state when there is no air in the membrane to the membrane bulging state when it is filled with air.

[0050] After the gas membrane is installed in the membrane pressure-maintaining structure, a certain "dead zone" exists between the membrane and the groove. Gas in this dead zone is exhausted and is independent of the rotational volume. Therefore, to measure the gas membrane volume, it is only necessary to measure the volume of gas required to move the membrane from its empty state to its inflated state when filled with gas.

[0051] A method for measuring gas surface membrane volume, based on a gas surface membrane volume measuring tool, specifically comprising the following steps:

[0052] S1. Assemble the tooling, seal the gas surface membrane into the membrane pressure-maintaining structure 8, and record the liquid levels on the left and right sides of the U-shaped measuring structure 2 in the initial state.

[0053] The left transparent measuring cylinder, the PVC transparent hose, the right transparent measuring cylinder, the silicone test bottle stoppers at both ends, the air valve, the inclined micromanometer and the membrane pressure-maintaining structure with the membrane installed form a closed-loop enclosed space structure. At this time, the liquid level in the left and right measuring cylinders is 600ML.

[0054] The specific steps of assembling the tooling in step S1 are:

[0055] S11. Adjust the tilting micromanometer. Use the anchor bolts to adjust the tilting micromanometer to a horizontal position. To determine whether it is level, observe whether the horizontal column of the red oil differential pressure gauge is centered. Use the knob to adjust the tilting micromanometer to 0Pa.

[0056] S12. Adjust the liquid level of the U-shaped measuring structure. To facilitate observation of the liquid level of the U-shaped measuring structure, it is temporarily set at 600ml. Observation method: Observe with your eyes at the same level as the 600ml liquid level, otherwise there will be a small range of error.

[0057] Screw the sealing cone into the measuring cylinder and press it tightly to ensure its sealing.

[0058] S13. Place the gas surface membrane in the membrane pressure-maintaining structure and seal it.

[0059] 1. Place the membrane separator assembly in the groove of the lower membrane box and fit the membrane edge to the groove step. (Note: The edge hole of the membrane separator assembly should be placed on the groove step).

[0060] 2. Place the sealing ring on the gas surface membrane and make the edge of the membrane flat on the groove step.

[0061] 3. Assemble the upper pressure plate to press the sealing ring (use 304 stainless steel 90-degree clamping lock to press the sealing ring and gas surface membrane).

[0062] 4. After compaction, the membrane pressure-maintaining structure should be placed sideways to simulate the membrane state inside the gas meter movement.

[0063] S2. Before pressurizing, tighten the pressure valve switch knob clockwise to ensure the sealing of the pressure.

[0064] Inject gas into the left end of the U-shaped measuring structure 2 through the pressurizing component: press the air valve to start pressurizing the enclosed space structure.

[0065] The gas pushes the liquid inside the U-shaped measuring structure 2 to flow toward the right end, causing the liquid level in the left transparent measuring cylinder to drop and the liquid level in the right transparent measuring cylinder to rise.

[0066] As the liquid level in the right transparent graduated cylinder rises, the gas in the right transparent graduated cylinder will be pushed out. The discharged gas flows along the gas pipe to the internal space of the membrane pressure-maintaining structure where the gas surface membrane is installed. Since there is still enough space in the membrane pressure-maintaining structure for gas to enter (the pressure inside the membrane pressure-maintaining structure and the gas pipe is zero at this time), the pressure displayed by the inclined micromanometer will automatically reset to zero after an instantaneous fluctuation.

[0067] S3. On the basis of step S2, continue to press the inflation valve to pressurize, and the liquid level in the right transparent graduated cylinder continues to rise, pushing the gas in the right transparent graduated cylinder to be continuously discharged into the membrane pressure maintaining structure where the gas surface membrane is installed. The gas surface membrane slowly bulges until the gas surface membrane in the membrane pressure maintaining structure 8 is completely bulged.

[0068] The steps for determining whether the gas surface membrane is completely bulged are as follows: when the pressure value displayed by the inclined micromanometer 7 rises sharply, it can be determined that the gas surface membrane is in a completely bulged state.

[0069] Inflate the membrane pressure-maintaining structure and control the pressure of the inclined differential pressure gauge at around 130 Pa. During the pressurization process, press and inflate slowly in a single cycle, and always pay attention to the state of the gas surface membrane in the membrane pressure-maintaining structure. When the gas surface membrane is about to be filled with gas, reduce the pressing amplitude and pay attention to the inclined differential pressure gauge. When the red oil in the inclined differential pressure gauge shows a rapid increase in pressure, gently press and inflate to around 130 Pa, and observe the liquid level in the right transparent graduated cylinder.

[0070] When the inner cavity of the membrane pressure-retaining structure of the installed gas meter membrane is filled with gas (the membrane is completely inflated), pressure begins to build up in the enclosed space formed by the gas meter membrane, the membrane pressure-retaining structure, the air pipe, and the inclined micromanometer. At this time, lightly press the air valve to increase pressure, and the pressure displayed on the inclined differential pressure gauge will rise sharply. Because the inclined differential pressure gauge uses PA as its unit, when the inclined micromanometer rises from 0Pa to 130Pa, the liquid level in the right transparent graduated cylinder will hardly change or will only rise slightly. When the inclined micromanometer displays 130Pa, the pressure in the enclosed space formed by the membrane pressure-retaining structure of the installed gas meter membrane, the air pipe, the inclined micromanometer, and the space above the liquid level of the right transparent graduated cylinder is 130Pa. In other words, the pressure in the enclosed cavity formed by the gas meter membrane and the membrane pressure-retaining structure is 130Pa. Observe the final liquid level reading of the right transparent graduated cylinder.

[0071] S4. Calculate the gas meter membrane volume using the liquid level difference on the left and right sides of the U-shaped measuring structure 2. When the pressure displayed by the inclined micromanometer remains stable at approximately 130 Pa for a prolonged period (the pressure holding time is 1 minute. If the pressure displayed by the inclined micromanometer drops, there is a seal problem. Repair the tooling seal and retest the pressure test; otherwise, the accuracy of the measured membrane volume will be affected). Read the reading from the right transparent graduated cylinder. Membrane volume = reading of the right transparent graduated cylinder after pressure test - reading of the right transparent graduated cylinder before pressure test = final reading - 600 ml.

Claims

1. A tool for measuring gas surface membrane volume, characterized in that: The invention comprises an operating table (1), wherein a U-shaped measuring structure (2) containing liquid is provided on the operating table (1), and scale lines are provided on the outer wall of the U-shaped measuring structure (2); one end of the U-shaped measuring structure (2) is connected to a pressurizing component for injecting gas into one side of the U-shaped measuring structure (2); the other end of the U-shaped measuring structure (2) is connected to a membrane pressure-maintaining structure (8) for sealing and positioning the gas surface membrane and causing the gas surface membrane to bulge when gas is introduced through an air pipe (6); the membrane pressure-maintaining structure (8) comprises a lower membrane box (81), and a groove (83) for positioning the gas surface membrane is provided at the top of the lower membrane box (81). The top edge of the surface membrane extends out from the groove (83), and there is a gap between the gas surface membrane and the groove (83) to form a ventilation cavity connected to the air pipe (6); the upper cover of the lower membrane box (81) is provided with an upper pressure plate (82), and a sealing ring (84) is also provided between the upper pressure plate (82) and the top edge of the gas surface membrane. The upper pressure plate (82) is provided with a locking and positioning component for locking and positioning the upper pressure plate (82), the sealing ring (84) and the top edge of the gas surface membrane to the lower membrane box (81); the side of the air pipe (6) is also connected to the inclined micromanometer (7) for detecting the air pressure in the air pipe and the membrane pressure maintaining structure (8).

2. A tool for measuring gas surface membrane volume according to claim 1, characterized in that: The U-shaped measuring structure (2) comprises a vertically arranged left transparent measuring cylinder (22), a vertically arranged right transparent measuring cylinder (23), and a PVC transparent hose (24) connected between the left transparent measuring cylinder (22) and the right transparent measuring cylinder (23). The top ends of the left transparent measuring cylinder (22) and the right transparent measuring cylinder (23) are respectively sealed with a silicone test bottle stopper (4); the air passage (6) is sealed and connected to the silicone test bottle stopper (4) located on the right side and is connected to the right transparent measuring cylinder (23).

3. A tool for measuring gas surface membrane volume according to claim 2, characterized in that: The pressurizing assembly comprises an air pumping tube which is sealed and inserted into the silica gel test bottle stopper (4) and is connected to the left transparent measuring cylinder (22), and an air pumping valve (3) arranged at the end of the air pumping tube.

4. A method for measuring the volume of a gas surface membrane, characterized in that: The method is based on a gas surface membrane volume measuring tool according to any one of claims 1 to 3, and comprises the following steps: S1. Assemble the tooling, assemble the gas surface membrane seal into the membrane pressure-maintaining structure (8), and record the liquid levels on the left and right sides of the U-shaped measuring structure (2) in the initial state; S2, injecting gas into the left end of the U-shaped measuring structure (2) through the pressurizing component, the gas pushes the liquid inside the U-shaped measuring structure (2) to flow toward the right end, and the gas at the right end of the U-shaped measuring structure (2) is discharged into the membrane pressure maintaining structure (8); S3, based on step S2, continue to inject gas into the left end of the U-shaped measuring structure (2) through the pressurizing component until the gas surface membrane in the membrane pressure maintaining structure (8) is completely inflated; In step S3, the step of determining whether the gas surface membrane is completely bulged is as follows: when it is found that the pressure value displayed by the inclined micromanometer (7) rises sharply, it can be determined that the gas surface membrane is in a completely bulged state at this time; S4. Calculate the gas surface membrane volume by using the liquid level difference on the left and right sides of the U-shaped measuring structure (2).

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