Calibration device for gas flowmeter volume corrector

Abstract

The utility model relates to a calibration device for gas flowmeter volume correction appearance, the calibration device includes: frame, clamping mechanism, clamping mechanism arrangement is on the frame, it includes the fixed plate and movable plate opposite each other to clamp the gas flowmeter volume correction appearance of waiting for calibration, make in the assembled state, movable plate, fixed plate and gas flowmeter volume correction appearance constitute closed test cavity together, pressure detection subassembly, pressure detection subassembly includes the air inlet mechanism for supplying air to test cavity and the standard pressure gauge for gathering the real -time pressure in test cavity, and controller, controller configuration can respectively with gas flowmeter volume correction appearance and standard pressure gauge form communication connection to obtain and compare the pressure value measured by gas flowmeter volume correction appearance and standard pressure gauge. The utility model calibration device can satisfy the calibration need of different specifications of gas flowmeter volume correction appearance.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and more specifically to a calibration device for a gas flow meter volume corrector. Background Technology

[0002] The gas flow meter volume corrector is a key device in a gas metering system, converting the volumetric flow rate under operating conditions into the volumetric flow rate under standard conditions (e.g., standard temperature and pressure). It is widely used in trade settlements for energy sources such as natural gas and coal gas, effectively avoiding metering disputes caused by temperature and pressure fluctuations. Furthermore, the gas flow meter volume corrector can provide data support for industrial production, environmental monitoring, and scientific research.

[0003] Currently, gas flow meter volume correction instruments typically include components such as a pressure sensor, a temperature sensor, a computing unit, a storage unit, a communication unit, and a display unit. The pressure sensor measures the gas pressure; the temperature sensor measures the gas temperature; and the computing unit processes the collected signals such as temperature, pressure, and volumetric flow rate to convert the volumetric flow rate under measurement conditions into the volumetric flow rate under standard conditions. Clearly, ensuring the accuracy of the collected data is crucial to the reliability of the gas flow meter volume correction instrument.

[0004] Existing technology has developed a calibration device for gas flow meter volume correctors, specifically for calibrating the pressure and temperature sensors of the gas flow meter volume corrector. For example, Chinese utility model patent CN214040268U discloses a calibration device for a gas flow meter volume corrector. This calibration device includes a pressure calibration device, a temperature calibration device, a data acquisition device, and an industrial control computer. The pressure calibration device includes a gas supply device for supplying gas to the pressure test channel of the gas flow meter; the temperature calibration device includes a constant temperature chamber for housing the gas flow meter; and the data acquisition device can be connected to the flow meter volume corrector and the industrial control computer to compare the data acquired by the calibration device with the data acquired by the flow meter volume corrector.

[0005] However, the calibration device uses two opposing flanges to fix the volume corrector to be calibrated, and the flanges and the volume corrector are fixed with screws. This is not only inconvenient to operate, but also cannot meet the calibration requirements of volume correctors of different specifications.

[0006] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0007] To address or alleviate to some extent the technical problem that existing calibration devices are unable to meet the calibration needs of gas flow meter volume correctors of different specifications, this utility model provides a calibration device for a gas flow meter volume corrector. The calibration device includes: a frame; a clamping mechanism arranged on the frame, comprising a fixed plate and a movable plate opposite to each other to clamp the gas flow meter volume corrector to be calibrated, such that in the assembled state, the movable plate, the fixed plate, and the gas flow meter volume corrector together form a closed test chamber; a pressure detection assembly, comprising an air inlet mechanism for supplying gas into the test chamber and a standard pressure gauge for acquiring the real-time pressure within the test chamber; and a controller configured to establish communicative connections with both the gas flow meter volume corrector and the standard pressure gauge to obtain and compare the pressure values ​​measured by the gas flow meter volume corrector and the standard pressure gauge.

[0008] Those skilled in the art will understand that the calibration device for a gas flow meter volume corrector of this invention includes a frame, a clamping mechanism, a pressure detection component, and a controller. The clamping mechanism is arranged on the frame to improve the structural stability of the calibration device. The clamping mechanism includes a fixed plate and a movable plate opposite to each other, so as to clamp the gas flow meter volume corrector to be calibrated between the fixed plate and the movable plate. In the assembled state, the fixed plate, the gas flow meter volume corrector, and the movable plate together form a closed test chamber. The pressure detection component includes an air inlet mechanism and a standard pressure gauge. The air inlet mechanism can supply air into the test chamber to adjust the pressure inside the test chamber, and the standard pressure gauge can accurately collect the real-time pressure inside the test chamber. The controller is configured to establish communication connections with both the gas flow meter volume corrector and the standard pressure gauge, thereby conveniently acquiring and comparing the pressure values ​​measured by the gas flow meter volume corrector and the standard pressure gauge, and then using the pressure value measured by the standard pressure gauge as a reference to calibrate the pressure value measured by the gas flow meter volume corrector. Therefore, this calibration device not only conveniently and stably clamps the gas flow meter volume corrector, making it easy to operate, but also allows for the flexible adjustment of the position between the movable and fixed plates to fix gas flow meter volume correctors of different specifications, meeting the calibration needs of gas flow meter volume correctors of different sizes (e.g., within the DN20-DN300 diameter range, where "DN" is the nominal diameter). Furthermore, by forming a closed test chamber together with the fixed plate, the gas flow meter volume corrector, and the movable plate, this calibration device provides a stable testing environment for the calibration process, ensuring calibration accuracy.

[0009] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the calibration device further includes a drive mechanism, which comprises a drive motor and a telescopic rod. One end of the telescopic rod is connected to the drive motor, and the other end is connected to the movable plate. The drive motor is communicatively connected to the controller. This drive mechanism allows for convenient control of the movable plate's movement towards or away from the fixed plate, ensuring a stable and secure clamping of the gas flow meter volume corrector. Furthermore, the communicative connection between the drive motor and the controller enables precise control of the clamping force applied to the gas flow meter volume corrector by the movable plate and the fixed plate.

[0010] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the drive mechanism further includes a guide rod arranged on the frame, wherein the guide rod is parallel to the telescopic rod and passes through the movable plate. The guide rod improves the stability of the movable plate's movement relative to the fixed plate.

[0011] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the clamping mechanism further includes a connecting plate located on the side of the movable plate away from the fixed plate. The connecting plate forms a flexible connection with the movable plate, and the telescopic rod is connected to the movable plate via the connecting plate. The connecting plate facilitates a flexible connection with the movable plate, preventing damage to the gas flow meter volume corrector caused by a rigid connection between the movable plate and the gas flow meter volume corrector.

[0012] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the air inlet mechanism includes: a gas source; and an air inlet pipe, one end of which is connected to the gas source, and the other end of which is connected to the test chamber. This configuration allows for convenient gas delivery into the test chamber to adjust the gas pressure within the chamber.

[0013] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, an air inlet connected to the air inlet pipe is provided on the fixed plate; and / or a solenoid valve communicating with the controller is provided on the air inlet pipe to control the amount of gas supplied from the gas source to the test chamber; and / or the gas source is compressed air or nitrogen; and / or the air inlet pipe is a stainless steel flexible hose. The air inlet being located on the fixed plate facilitates the guidance of gas from the gas source to the test chamber. The solenoid valve allows for convenient control of the opening and closing of the air inlet pipe. Furthermore, the solenoid valve is configured to communicate with the controller, allowing for precise control of the solenoid valve by the controller, thereby improving the accuracy of the amount of gas supplied from the gas source to the test chamber. Using compressed air or nitrogen as the gas source not only provides a stable test gas but also reduces the cost of the test gas. Using a stainless steel flexible hose for the air inlet pipe not only provides good pressure resistance but also facilitates pipeline installation.

[0014] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, a pressure detection port spaced apart from the air inlet is provided on the fixed plate, and the standard pressure gauge is connected to the test chamber through the pressure detection port. The pressure detection port is arranged on the fixed plate so that the standard pressure gauge can be easily connected to the test chamber through this port, ensuring the accuracy of the standard pressure gauge test.

[0015] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the standard pressure gauge is a pressure sensor to accurately obtain the real-time pressure inside the test chamber.

[0016] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the fixed plate and the movable plate are both made of flexible material. By applying a suitable force to the fixed plate and the movable plate made of flexible material, appropriate deformation can be generated in the fixed plate and the movable plate, thereby ensuring the sealing effect of the test chamber.

[0017] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the flexible material is silicone, rubber, polyimide, polyamide, or polyamide ester.

[0018] In the preferred embodiment of the calibration device for the gas flow meter volume corrector described above, the calibration device further includes a temperature detection component. The temperature detection component comprises multiple thermostatic oil baths spaced apart from each other and a standard thermometer for measuring the real-time temperature within the thermostatic oil baths. The thermostatic oil baths are adapted to accommodate the gas flow meter volume corrector. The controller is communicatively connected to the standard thermometer to acquire and compare the temperature values ​​measured by the gas flow meter volume corrector and the standard thermometer. Through the above configuration, the temperature values ​​acquired by the gas flow meter volume corrector can be further calibrated. Attached Figure Description

[0019] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the calibration device for a gas flow meter volume corrector according to the present invention;

[0021] Figure 2 This is a schematic diagram of an embodiment of the clamping mechanism in the calibration device for a gas flow meter volume corrector of this utility model.

[0022] Figure 3 yes Figure 2 The image shown is a partial enlarged view of part A of an embodiment of the clamping mechanism in the calibration device for a gas flow meter volume corrector of this utility model.

[0023] List of reference numerals in the attached diagram:

[0024] 100. Calibration device; 110. Frame; 111. Base plate; 112. Base; 113. Side plate; 114. Top plate; 120. Clamping mechanism; 121. Fixing plate; 1211. Air inlet; 1212. Pressure detection port; 122. Movable plate; 123. Connecting plate; 124. Connecting rod; 125. Elastic element; 126. Fixing nut; 130. Drive mechanism; 131. Drive motor; 132. Telescopic rod; 13 3. Guide rod; 140. Pressure detection assembly; 141. Air intake mechanism; 1411. Air source; 1412. Air intake pipe; 1413. Solenoid valve; 142. Standard pressure gauge; 150. Controller; 160. Temperature detection assembly; 161. Constant temperature oil bath; 1611. First constant temperature oil bath; 1612. Second constant temperature oil bath; 1613. Third constant temperature oil bath; 162. Standard thermometer; 200. Gas flow meter volume correction device. Detailed Implementation

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In order to solve or alleviate to some extent the technical problem that the existing calibration devices are difficult to meet the calibration needs of gas flow meter volume correctors of different specifications, this utility model provides a calibration device 100 for a gas flow meter volume corrector 200. The calibration device 100 includes: a frame 110; a clamping mechanism 120 disposed on the frame 110, which includes a fixed plate 121 and a movable plate 122 opposite to each other to clamp the gas flow meter volume corrector 200 to be calibrated, such that in the assembled state, the movable plate 122, the fixed plate 121 and the gas flow meter volume corrector 200 together form a closed test chamber; a pressure detection assembly 140, which includes an air inlet mechanism 141 for supplying gas into the test chamber and a standard pressure gauge 142 for acquiring the real-time pressure in the test chamber; and a controller 150 configured to establish communication connections with the gas flow meter volume corrector 200 and the standard pressure gauge 142 respectively, so as to obtain and compare the pressure values ​​measured by the gas flow meter volume corrector 200 and the standard pressure gauge 142.

[0029] Figure 1 This is a schematic diagram of an embodiment of the calibration device for a gas flow meter volume corrector according to this utility model. Figure 1As shown, in one or more embodiments, the calibration device 100 of this utility model includes components such as a frame 110, a clamping mechanism 120, a pressure detection component 140, and a controller 150. The frame 110 provides suitable installation space for the clamping mechanism 120 and the pressure detection component 140. The clamping mechanism 120 can flexibly and conveniently clamp gas flow meter volume correctors 200 of different specifications to be calibrated. The pressure detection component 140 provides a suitable pressure environment for calibrating the gas flow meter volume corrector 200 and provides a comparison benchmark for the built-in pressure sensor (not shown) of the gas flow meter volume corrector 200. The controller 150 can form a communication connection with the pressure detection component 140 and the gas flow meter volume corrector 200 to automatically acquire and compare the collected pressure values, thereby determining whether the built-in pressure sensor of the gas flow meter volume corrector 200 is qualified.

[0030] It should be noted that the calibration device 100 of this utility model can be applied not only to split-type gas flow meter volume correctors, but also to integrated gas flow meter volume correctors. Furthermore, the gas flow meter volume corrector 200 can be, but is not limited to, a gas flow meter volume corrector.

[0031] Figure 2 This is a schematic diagram of an embodiment of the clamping mechanism in the calibration device for a gas flow meter volume corrector according to this utility model. Figure 2 As shown, in one or more embodiments, the frame 110 includes components such as a base plate 111, a base 112, side plates 113, and a top plate 114. Based on Figure 2 As shown, the base plate 111 is located at the lower part of the entire frame 110 to provide stable support. The base plate 111 has a generally rectangular shape. Alternatively, the base plate 111 may also be square, circular, or other suitable shapes. The base 112 is arranged above the base plate 111 and is generally located in the middle of the base plate 111. The base 112 has a generally cuboid or other suitable shape. See also Figure 1 The base 112 has a generally hollow cavity inside to provide suitable installation space for components such as the air inlet pipe 1412 of the pressure detection assembly 140. A side plate 113 extends vertically upwards approximately along the left, right, and front edges of the base 112 to form an opening (not shown) on the rear side of the frame 110, allowing for easy fixing and removal of the gas flow meter volume corrector 200 to be calibrated. A top plate 114 is arranged above the side plate 113, giving the entire frame 110 a simple and stable structure. The top plate 114 can be rectangular, square, circular, or other suitable shapes. In one or more embodiments, a gantry crane (not shown) is also provided on the top plate 114 to facilitate the transport and loading / unloading of the gas flow meter volume corrector 200.

[0032] It should be noted that the frame 110 can be made of a suitable metal material (such as stainless steel) to give it good mechanical strength. Furthermore, the various components of the frame 110 can be fixed together by screws, welding, or other suitable methods, which will not be elaborated further here.

[0033] like Figure 2 As shown, in one or more embodiments, the clamping mechanism 120 is arranged on the frame 110 to stably clamp the flow meter volume corrector. The clamping mechanism 120 includes a fixed plate 121 and a movable plate 122 opposite to each other. The movable plate 122 can move towards or away from the fixed plate 121 to flexibly clamp gas flow meter volume correctors 200 of different specifications. Based on Figure 2 As shown in the orientation, in one or more embodiments, the fixed plate 121 is fixed horizontally to the base 112 of the frame 110, while the movable plate 122 is arranged horizontally above the base 112. Alternatively, the fixed plate 121 and the movable plate 122 can also be arranged in other suitable positions on the frame 110, for example, the fixed plate 121 can be arranged horizontally near the top plate 114, and the movable plate 122 can be arranged horizontally below the fixed plate 121. Furthermore, the fixed plate 121 and the movable plate 122 can also be arranged to extend vertically, as long as they can be matched with each other to clamp the flow meter volume corrector. Through the cooperation of the fixed plate 121 and the movable plate 122, the gas flow meter volume corrector 200 can be clamped conveniently and stably, making operation convenient. Moreover, the positions between the movable plate 122 and the fixed plate 121 can be flexibly adjusted to fix gas flow meter volume correctors 200 of different specifications, meeting the calibration needs of gas flow meter volume correctors 200 of different specifications. In the assembled state, the movable plate 122, the gas flow meter volume corrector 200, and the fixed plate 121 together form a closed test chamber to provide a stable test environment for the calibration process and ensure calibration accuracy. In one or more embodiments, the fixed plate 121 and the movable plate 122 are each made of a flexible material, so that by applying appropriate force to the fixed plate 121 and the movable plate 122, they can produce appropriate deformation, thereby ensuring the sealing effect of the test chamber. It should be noted that the flexible material can be, but is not limited to, silicone, rubber, polyimide, polyamide, or polyamide ester. Alternatively, the fixed plate 121 and the movable plate 122 can also be made of composite materials, such as silicone bonded to a metal plate.

[0034] like Figure 2As shown, in one or more embodiments, an air inlet 1211 is provided on the fixed plate 121, and the air intake mechanism 141 in the pressure detection assembly 140 supplies gas into the test chamber through the air inlet 1211 to adjust the pressure in the test chamber. It should be noted that the diameter of the air inlet 1211 can be adjusted according to actual needs, such as 5mm, 6mm, 7mm, etc.

[0035] like Figure 2 As shown, in one or more embodiments, a pressure detection port 1212, spaced apart from the air inlet 1211, is also provided on the fixed plate 121, and the standard pressure gauge 142 in the pressure detection assembly 140 is connected to the test chamber through the pressure detection port 1212. The standard pressure gauge 142 can form a sealed connection with the pressure detection port 1212 to prevent gas in the test chamber from leaking out of the pressure detection port 1212, thus ensuring the stability of the pressure inside the test chamber. It should be noted that the diameter of the pressure detection port 1212 can be adjusted according to actual needs, as long as it can match the standard pressure gauge 142.

[0036] Figure 3 yes Figure 2 The image shown is a partial enlarged view of part A of an embodiment of the clamping mechanism in the calibration device for a gas flow meter volume corrector of this utility model. (See image.) Figure 2 and Figure 3 As shown, in one or more embodiments, the clamping mechanism 120 further includes a connecting plate 123 located on the side of the movable plate 122 away from the fixed plate 121. Based on Figure 2As shown, the connecting plate 123 is positioned above the movable plate 122. The connecting plate 123 and the movable plate 122 form a flexible connection, thus preventing damage to the gas flow meter volume corrector 200 caused by a rigid connection between the movable plate 122 and the gas flow meter volume corrector 200. In one or more embodiments, four connecting rods 124 spaced apart from each other are provided between the movable plate 122 and the connecting plate 123. An elastic element 125 is fitted onto each connecting rod 124. The elastic element 125 can be, but is not limited to, a coil spring. A fixing nut 126 is provided at the end of each connecting rod 124, constraining the elastic element 125 between the connecting plate 123 and the fixing nut 126. Therefore, when an external force acts on the connecting plate 123 and causes the movable plate 122 to move towards the fixed plate 121, the movable plate 122 will gradually approach and abut against the gas flow meter volume corrector 200 placed on the fixed plate 121. If the connecting plate 123 continues to apply external force to the movable plate 122, the gas flow meter volume corrector 200 will react on the movable plate 122, causing the elastic element 125 between the fixing nut 126 and the connecting plate 123 to contract and deform, thereby achieving a flexible connection between the movable plate 122 and the gas flow meter volume corrector 200. It should be noted that the connecting rods 124 can also be configured in three, five, or other suitable quantities.

[0037] like Figure 1 and Figure 2 As shown, in one or more embodiments, the calibration device 100 of this utility model further includes a drive mechanism 130 for driving the movable plate 122 to move toward or away from the fixed plate 121. The drive mechanism 130 includes a drive motor 131 and a telescopic rod 132. The drive motor 131 can be arranged inside the base 112, so that the entire calibration device 100 has a low center of gravity, a more stable structure, and avoids significant shaking and noise. The drive motor 131 can be a servo motor, a stepper motor, or other suitable motor. The drive motor 131 can form a communication connection with the controller 150 so that the controller 150 can automatically control the on / off state and output power of the drive motor 131. Figure 2As shown, the telescopic rod 132 extends generally in the vertical direction. In one or more embodiments, one end of the telescopic rod 132 is connected to the drive motor 131, while the other end is connected to the movable plate 122, so that when the drive motor 131 rotates in the forward or reverse direction, the telescopic rod 132 can extend or retract accordingly, thereby driving the movable plate 122 to move away from or towards the fixed plate 121. Alternatively, one end of the telescopic rod 132 is connected to the drive motor 131, while the other end is connected to the connecting plate 123. In other words, the telescopic rod 132 is not directly connected to the movable plate 122, but indirectly connected to it through the connecting plate 123. It should be noted that the specific form of the telescopic rod 132 is not limited, such as a threaded screw, ball screw, trapezoidal screw, etc. Furthermore, the number of drive mechanisms 130 can be set to multiple according to actual needs, so as to apply a more stable and uniform external force to the movable plate 122 and improve the clamping effect of the clamping mechanism 120. Furthermore, the drive mechanism 130 can also be configured as a "hydraulic pump + hydraulic rod", "pneumatic pump + pneumatic rod" or other suitable form, as long as it can flexibly control the relative position of the movable plate 122.

[0038] like Figure 2 As shown, in one or more embodiments, the drive mechanism 130 further includes a guide rod 133 arranged on the frame 110. Based on Figure 2 As shown, the guide rod 133 extends generally in a vertical direction. In other words, the guide rod 133 is generally parallel to the telescopic rod 132. The lower end of the guide rod 133 is fixed to the base 112, while the upper end of the guide rod 133 is fixed to the top plate 114. The guide rod 133 passes through the movable plate 122. That is, the movable plate 122 has a through hole (not shown in the figure) that allows the guide rod 133 to pass through, and the movable plate 122 and the guide rod 133 are movably connected. In one or more embodiments, the guide rod 133 includes four spaced apart from each other, and these four guide rods 133 are respectively located at the four corners of the movable plate 122. The arrangement of the guide rods 133 allows the movable plate 122 to rise or fall more stably, avoiding deviation. It should be noted that the number of guide rods 133 can also be set to three, five, etc.

[0039] like Figure 1 As shown, in one or more embodiments, the pressure detection assembly 140 includes an air intake mechanism 141 and a standard pressure gauge 142. The air intake mechanism 141 supplies air to the test chamber, while the standard pressure gauge 142 collects the real-time pressure within the test chamber.

[0040] See also Figure 1In one or more embodiments, the air intake mechanism 141 includes an air source 1411 and an air intake pipe 1412. The air source 1411 can be compressed air, nitrogen, or other suitable gas. One end of the air intake pipe 1412 is connected to the air source 1411, and the other end of the air intake pipe 1412 is connected to the test chamber, allowing the air source 1411 to conveniently supply air to the test chamber through the air intake pipe 1412, thereby adjusting the pressure inside the test chamber. The air intake pipe 1412 can be a stainless steel flexible hose, giving it good pressure resistance (e.g., pressure resistance of not less than 20 bar) and facilitating pipeline layout. The air intake pipe 1412 can be connected to the test chamber through an air inlet 1211 provided on the fixed plate 121. In one or more embodiments, an electromagnetic valve 1413 is provided on the air inlet pipe 1412 to communicate with the controller 150, so as to control the amount of air supplied from the air source 1411 to the test chamber, thereby adjusting the air pressure in the test chamber (e.g., in the range of 1 bar to 10 bar).

[0041] See also Figure 1 In one or more embodiments, a standard pressure gauge 142 is disposed inside the base 112 to effectively protect the standard pressure gauge 142. The standard pressure gauge 142 can be a pressure sensor. The type of pressure sensor is not limited, as long as it can accurately detect the real-time pressure in the test chamber. The standard pressure gauge 142 can be connected to the test chamber through a pressure detection port 1212 formed on the fixing plate 121.

[0042] like Figure 1As shown, in one or more embodiments, the calibration device 100 of this invention further includes a temperature detection component 160. The temperature detection component 160 includes a plurality of thermostatic oil baths 161 spaced apart from each other and a standard thermometer 162 for measuring the real-time temperature within the thermostatic oil baths 161. Each thermostatic oil bath 161 can automatically heat up or cool down to a set temperature. Additionally, each thermostatic oil bath 161 can accommodate a gas flow meter volume corrector 200 to be calibrated, providing it with a calibration environment of suitable temperature. In one or more embodiments, the plurality of thermostatic oil baths 161 includes a first thermostatic oil bath 1611, a second thermostatic oil bath 1612, and a third thermostatic oil bath 1613. The set temperature of the first thermostatic oil bath 1611 is -10°C, the set temperature of the second thermostatic oil bath 1612 is 25°C, and the set temperature of the third thermostatic oil bath 1613 is 60°C. Alternatively, the thermostatic oil baths 161 can also be provided in two, four, or other suitable quantities. Furthermore, the set temperature of each constant temperature bath can be adjusted according to actual needs. The standard thermometer 162 can be, but is not limited to, a temperature sensor or thermometer. The standard thermometer 162 establishes a communication connection with the controller 150 to acquire and compare the temperature values ​​measured by the gas flow meter volume corrector 200 and the standard thermometer 162. Specifically, the standard thermometer 162 can accurately acquire the real-time temperature within each constant temperature oil bath 161, thereby providing a comparison benchmark for calibrating the built-in temperature sensor (not shown in the figure) of the gas flow meter volume corrector 200; the controller 150 establishes a communication connection with the standard thermometer 162 and the gas flow meter volume corrector 200 to automatically acquire and compare the acquired temperature values, thereby determining whether the built-in temperature sensor of the gas flow meter volume corrector 200 is qualified.

[0043] like Figure 1 As shown, in one or more embodiments, the controller 150 establishes communication connections with the gas flow meter volume corrector 200 and the standard pressure gauge 142 of the pressure detection component 140, respectively, to acquire and compare the pressure values ​​measured by the gas flow meter volume corrector 200 and the standard pressure gauge 142. The controller 150 may be, but is not limited to, a host computer. Further, the controller 150 establishes a communication connection with the drive motor 131 of the drive mechanism 130 to control the on / off state and output power of the drive motor 131. Further, when the controller 150 establishes a communication connection with the gas flow meter volume corrector 200, it can synchronously acquire the temperature value collected by the gas flow meter volume corrector 200. Further, the controller 150 establishes a communication connection with the solenoid valve 1413 of the air intake mechanism 141 to control the on / off state and opening degree of the solenoid valve 1413. Further, the controller 150 also establishes a communication connection with the standard thermometer 162 to acquire the real-time temperature collected by the standard thermometer 162. It should be noted that the controller 150 can communicate with various functional components in any way, such as wired connection, wireless connection, etc.

[0044] In one or more embodiments, the detection device of this invention further includes a display (not shown) connected to the controller 150 to display raw data and calibration results, thereby enhancing the visualization of the testing process.

[0045] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A calibration device (100) for a gas flow meter volume corrector (200), characterized in that, The calibration device (100) includes: Rack (110); A clamping mechanism (120) is arranged on the frame (110) and includes a fixed plate (121) and a movable plate (122) opposite each other to clamp the gas flow meter volume corrector (200) to be calibrated, such that in the assembled state, the movable plate (122), the fixed plate (121) and the gas flow meter volume corrector (200) together form a closed test chamber; A pressure detection assembly (140), the pressure detection assembly (140) including an air intake mechanism (141) for supplying air into the test chamber and a standard pressure gauge (142) for testing the real-time pressure in the test chamber; and A controller (150) is configured to communicate with the gas flow meter volume corrector (200) and the standard pressure gauge (142) respectively to obtain and compare the pressure values ​​measured by the gas flow meter volume corrector (200) and the standard pressure gauge (142).

2. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 1, characterized in that, The calibration device (100) further includes: A drive mechanism (130) includes a drive motor (131) and a telescopic rod (132). One end of the telescopic rod (132) is connected to the drive motor (131), and the other end of the telescopic rod (132) is connected to the movable plate (122). The drive motor (131) is connected in communication with the controller (150).

3. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 2, characterized in that, The drive mechanism (130) further includes a guide rod (133) arranged on the frame (110), wherein the guide rod (133) is parallel to the telescopic rod (132) and the guide rod (133) passes through the movable plate (122).

4. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 2, characterized in that, The clamping mechanism (120) further includes: A connecting plate (123) is located on the side of the movable plate (122) away from the fixed plate (121), wherein the connecting plate (123) and the movable plate (122) form a flexible connection, and the telescopic rod (132) is connected to the movable plate (122) through the connecting plate (123).

5. The calibration device (100) for a gas flow meter volume corrector (200) according to any one of claims 1 to 4, characterized in that, The air intake mechanism (141) includes: Gas source (1411); and An air intake pipe (1412) is provided, one end of which is connected to the air source (1411), and the other end of which is connected to the test chamber.

6. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 5, characterized in that, An air inlet (1211) communicating with the air inlet pipe (1412) is provided on the fixing plate (121); and / or A solenoid valve (1413) is provided on the air inlet pipe (1412) and communicates with the controller (150) to control the amount of air supplied from the air source (1411) to the test chamber; and / or The gas source (1411) is compressed air or nitrogen; and / or The air intake pipe (1412) is a stainless steel flexible hose.

7. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 6, characterized in that A pressure detection port (1212) spaced apart from the air inlet (1211) is provided on the fixed plate (121), and the standard pressure gauge (142) is connected to the test chamber through the pressure detection port (1212).

8. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 1, characterized in that, The fixed plate (121) and the movable plate (122) are respectively made of flexible materials.

9. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 8, characterized in that, The flexible material is silicone, rubber, polyimide, polyamide, or polyamide ester.

10. The calibration device (100) for a gas flow meter volume corrector (200) according to claim 1, characterized in that, The calibration device (100) further includes: A temperature detection assembly (160) includes a plurality of thermostatic oil baths (161) spaced apart from each other and a standard thermometer (162) for measuring the real-time temperature within the thermostatic oil baths (161). The thermostatic oil baths (161) are adapted to accommodate the gas flow meter volume corrector (200). The controller (150) is connected to the standard thermometer (162) to obtain and compare the temperature values ​​measured by the gas flow meter volume corrector (200) and the standard thermometer (162).

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