Calibration equipment for gas flow meter

Abstract

The utility model provides calibration equipment for a gas flow meter. The calibration equipment comprises a box body; the partition plate is horizontally mounted in the box body so as to divide the box body into a first cavity and a second cavity which are stacked up and down; the calibration mechanism is arranged in the second cavity and comprises a first gas flow meter, interfaces of the gas inlet side and the gas outlet side of the first gas flow meter are arranged in the first cavity, and the calibration mechanism is suitable for being detachably connected into a pipeline of an external detected gas flow meter in series so as to serve as a standard meter to obtain flow information of the detected gas flow meter; the compensation assembly is configured to obtain parameter information of the gas inlet side and / or the gas outlet side of the first gas flowmeter; and the control assembly is suitable for collecting and / or displaying the flow information and the parameter information.

Description

Technical Field

[0001] At least one embodiment of the utility model relates to the technical field of gas flow meter measurement and calibration equipment, and more specifically, to a calibration equipment for a gas flow meter. Background Art

[0002] With the continuous development of new technologies, micro gas flow meters have been widely used in industrial production, medical and health, environmental monitoring and other fields, such as gas float flow meters and thermal gas mass flow meters. Therefore, micro gas flow meters need to be calibrated regularly to maintain their accuracy in the application scenarios.

[0003] At present, for the calibration of such micro gas flow meters, the user units usually dismantle the micro gas flow meters to be inspected and transport them to the corresponding metering institutions for inspection. For example, the metering institutions use critical flow venturi nozzle method gas flow standard devices or bell-shaped gas flow standard devices to calibrate the micro gas flow meters to be inspected.

[0004] However, due to the differences in working conditions between the calibration agency and the user unit, and the fact that the calibrated micro gas flowmeter will be affected by transportation conditions (such as vibration) when it is returned to the user unit, it is difficult to ensure the accuracy of the micro gas flowmeter returned to the user unit. Furthermore, in some usage scenarios, the micro gas flowmeter is also limited by the fact that the configured installation pipeline does not have disassembly conditions and cannot be disassembled for inspection. For this reason, online calibration and local calibration requirements are proposed for the calibration of micro gas flowmeters.

[0005] However, the standard devices used in the metering mechanism, such as the critical flow venturi nozzle method gas flow standard device and the bell-shaped gas flow standard device, are large in size and cannot be moved. Therefore, how to provide a gas flow meter calibration device that is suitable for online detection of micro gas flow meters and meets the requirements of high integration and portability has become a technical problem that needs to be solved urgently. Utility Model Content

[0006] In order to solve at least one technical problem in the prior art and other aspects, the utility model provides a calibration device for a gas flow meter. The calibration mechanism is integrated in the box, so that the calibration device for the gas flow meter has a high degree of integration and portability, so as to meet the requirements of easy carrying and online detection of the gas flow meter under test.

[0007] An embodiment of the utility model provides a calibration device for a gas flow meter, comprising: a box body; a partition, horizontally installed in the above-mentioned box body to divide the above-mentioned box body into a first cavity and a second cavity stacked up and down; a calibration mechanism, arranged in the above-mentioned second cavity, comprising: a first gas flow meter, interfaces on the air inlet side and the air outlet side of the above-mentioned first gas flow meter are arranged in the above-mentioned first cavity, suitable for being detachably connected in series with a pipeline of an external gas flow meter to be tested, so as to be used as a standard meter to obtain flow information of the above-mentioned gas flow meter to be tested; a compensation component, configured to obtain parameter information on the air inlet side and / or air outlet side of the above-mentioned first gas flow meter; and a control component, suitable for collecting and / or displaying the above-mentioned flow information and the above-mentioned parameter information.

[0008] According to an embodiment of the utility model, an access pipe is arranged on the air inlet side of the first gas flow meter, and an outlet pipe is arranged on the air outlet side of the first gas flow meter. The ends of the access pipe and the outlet pipe provided with interfaces both pass through the partition so that the interfaces are exposed in the first cavity above the partition.

[0009] According to an embodiment of the present utility model, the above-mentioned compensation component is suitable for collecting temperature parameter information and / or pressure parameter information.

[0010] According to an embodiment of the utility model, the compensation component includes a temperature detection module arranged on the inlet pipe and / or the outlet pipe.

[0011] According to an embodiment of the utility model, the above-mentioned compensation component also includes at least one group of pressure detection modules, and one group includes multiple pressure detection modules; wherein, the multiple pressure detection modules in the same group have different ranges, and in response to the pressure range in the pipeline of the above-mentioned gas flowmeter to which the above-mentioned first gas flowmeter is connected, one of the multiple pressure detection modules is selected to be connected to the pressure measuring port on the above-mentioned access pipe and / or the above-mentioned outlet pipe.

[0012] According to an embodiment of the utility model, a pressure measuring joint is further included, and the pressure measuring joint is arranged at a position on the partition corresponding to the pressure measuring port.

[0013] According to an embodiment of the utility model, the control component includes a control unit and a collection module, the collection module is connected to the signal output end of the first gas flow meter and / or the compensation component, and the control unit is connected to the signal output end of the collection module.

[0014] According to an embodiment of the utility model, the body of the first gas flow meter is installed in the second cavity, and the display unit of the first gas flow meter passes through the partition so that the interface is exposed in the first cavity above the partition.

[0015] According to an embodiment of the utility model, the partition is detachably installed in the box body, and at least a part of the calibration mechanism is installed on the partition so as to be taken out of and put into the box body along with the partition.

[0016] According to an embodiment of the utility model, the box body comprises an upper shell and a lower shell; wherein, one of the upper shell and the lower shell is suitable for installing the partition, and the other is used for sealing the first cavity located above the partition.

[0017] According to the calibration equipment for gas flowmeter provided by the utility model, the first gas flowmeter in the calibration mechanism is used as a standard table, which is suitable for being connected in series to the pipeline of the gas flowmeter to be tested, so as to calibrate the gas flowmeter to be tested based on the standard table method; the compensation component in the calibration mechanism is suitable for obtaining parameter information of the inlet side and / or outlet side of the first gas flowmeter connected to the pipeline, so as to obtain the actual working condition of the first gas flowmeter in the pipeline; the control component is suitable for the overall collection and / or display of flow information and parameter information, so as to express the calibration status of the gas flowmeter to be tested. The first gas flowmeter, the compensation component and the control component in the calibration mechanism are all integrated to not only meet the functional requirements for the calibration of the gas flowmeter to be tested, but also meet the requirements of its portability, so that the calibration equipment for gas flowmeter is easy to carry and the gas flowmeter to be tested can be tested online. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of a calibration device for a gas flow meter according to an exemplary embodiment of the utility model;

[0019] Figure 2 yes Figure 1 The illustrated exemplary embodiment is a perspective view with the case hidden;

[0020] Figure 3 yes Figure 2 A schematic diagram of a pressure detection module connected to a calibration mechanism shown; and

[0021] Figure 4 yes Figure 2 Schematic diagram of the control components in the calibration mechanism shown.

[0022] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0023] 1. Box body;

[0024] 11. Upper shell;

[0025] 12. Lower housing;

[0026] 13. flange;

[0027] 2. Partition;

[0028] 3. Calibration agency;

[0029] 31. A first gas flow meter;

[0030] 311, access pipe;

[0031] 312, lead-out pipe;

[0032] 313, pressure measuring port;

[0033] 32. Temperature detection module;

[0034] 33. Pressure detection module;

[0035] 331, first pressure transmitter;

[0036] 332. A second pressure transmitter;

[0037] 333, third pressure transmitter;

[0038] 34. Pressure measuring joint;

[0039] 35. Connecting pipe;

[0040] 4. Control department;

[0041] 5. Power supply plug;

[0042] 6. Cooling fan; and

[0043] 7. Collection module. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0045] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "include", "comprises", etc. used herein indicate the existence of features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0046] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0047] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0048] Figure 1 It is a cross-sectional view of a calibration device for a gas flow meter according to an illustrative embodiment of the utility model. Figure 2 yes Figure 1 The illustrated exemplary embodiment hides the perspective view of the housing.

[0049] According to the gas flow meter calibration device provided by the utility model, Figure 1 and Figure 2 As shown, it includes a box body 1, a partition 2 and a calibration mechanism 3. The partition 2 is horizontally installed in the box body 1 to divide the box body 1 into a first cavity and a second cavity stacked up and down. The calibration mechanism 3 is arranged in the second cavity, including a first gas flow meter 31, a compensation component and a control component. The interfaces on the air inlet side and the air outlet side of the first gas flow meter 31 are arranged in the first cavity, which is suitable for detachably connecting in series to the pipeline of the external gas flow meter to be tested, so as to be used as a standard table to obtain the flow information of the gas flow meter to be tested. The compensation component is configured to obtain parameter information on the air inlet side and / or air outlet side of the first gas flow meter 31. The control component is suitable for collecting and / or displaying flow information and parameter information.

[0050] In such an implementation, the first gas flow meter in the calibration mechanism is used as a standard meter, which is suitable for being connected in series to the pipeline of the gas flow meter to be tested, so as to calibrate the gas flow meter to be tested based on the standard meter method; the compensation component in the calibration mechanism is suitable for obtaining parameter information of the air inlet side and / or air outlet side of the first gas flow meter connected to the pipeline, so as to obtain the actual working condition of the first gas flow meter in the pipeline; the control component is suitable for the overall collection and / or display of flow information and parameter information, so as to express the calibration status of the gas flow meter to be tested. The first gas flow meter, the compensation component and the control component in the calibration mechanism are all integrated to not only meet the functional requirements for the calibration of the gas flow meter to be tested, but also meet the requirements of its portability, so that the calibration equipment for the gas flow meter is easy to carry and the gas flow meter to be tested can be tested online.

[0051] According to the embodiments of the present utility model, Figure 1 and Figure 2 As shown, the box body 1 includes an upper shell 11 and a lower shell 12. Among them, one of the upper shell 11 and the lower shell 12 is suitable for installing the partition 2, and the other is used for sealing the first cavity located above the partition 2.

[0052] In an illustrative embodiment, Figure 1 As shown, the box body 1 includes but is not limited to a box-type mechanism configured as a cube. Figure 1 The lower end of the upper shell 11 and the upper end of the lower shell 12 are shown to form an opening, and a flange 13 extending outward along the opening is formed to form a portion suitable for locking the upper shell 11 and the lower shell 12 when the upper shell 11 and the lower shell 12 are closed. For example, a lock is arranged on the flange 13.

[0053] In an illustrative embodiment, the housing 1 may be provided with a roller mechanism (not shown in the figure). Specifically, the roller mechanism may be provided at the joint between the bottom surface and the side surface of the housing 1. Furthermore, the roller mechanism includes at least two rollers, which are symmetrically provided on both sides of the housing 1 with respect to the center line of the housing 1. In this way, when the calibration device for the gas flow meter is moved, the housing 1 may be dragged on the working surface (such as the ground) along the rolling direction of the rollers.

[0054] In an illustrative embodiment, the box 1 may be equipped with a pull rod mechanism (not shown in the figure). Specifically, one end of the pull rod mechanism is fixed to the top surface of the box 1 or the side surface adjacent to the top surface, and the other end of the pull rod mechanism extends upward from the upper part of the box 1 for the calibration personnel to pull. Furthermore, the pull rod mechanism may be configured as a retractable structure for storage.

[0055] It should be noted here that any roller mechanism and pull rod mechanism that can be used in the art to facilitate the carrying of the box can be selected and applied, and no further details will be given.

[0056] According to the embodiments of the present utility model, Figure 1 and Figure 2 As shown, the partition 2 is detachably installed in the box body 1, and at least a part of the calibration mechanism 3 is installed on the partition 2 so as to be taken out of and put into the box body 1 along with the partition 2.

[0057] In an illustrative embodiment, Figure 1 and Figure 2As shown, the first gas flow meter 31, the compensation component and the control component are all installed on the partition 2. In detail, the installation method includes but is not limited to direct installation and indirect installation. Among them, direct installation is characterized by a component being fixedly installed on the partition 2; indirect installation is characterized by a component being installed with other components directly installed on the partition 2. Furthermore, in order to facilitate the lifting of the partition 2 (including the calibration mechanism 3), a handle is also configured on the partition 2.

[0058] In an illustrative embodiment, Figure 1 and Figure 2 As shown, the partition 2 is horizontally arranged in the lower shell 12, and the partition 2 divides the space in the lower shell 12 into a first cavity located above the partition 2 and a second cavity located below the partition 2. Further, both ends of the partition 2 (such as Figure 2 The upper left end and the lower right end shown in the figure can be constructed to have a bent portion bent downward, and a boss is also configured on the inner wall of the corresponding lower shell 12, so that the bent portion is pressed against the boss, so that the partition is embedded in the box body 1. In this way, the upper shell 11 can be used as a cover of the lower shell 12, so as to open or close the first cavity above the partition 2, and the calibration mechanism 3 located in the second cavity can be installed on the partition 2, so that a distance is formed between the calibration mechanism 3 and the inner wall (such as the bottom surface and / or the side surface) of the lower shell 12, so as to reduce the impact of the calibration equipment for the gas flow meter on the calibration mechanism 3 during the movement.

[0059] According to the embodiments of the present utility model, Figure 1 and Figure 2 As shown, the body of the first gas flow meter 31 is installed in the second cavity, and the display part of the first gas flow meter 31 passes through the partition 2 so that the interface is exposed in the first cavity above the partition 2.

[0060] In an illustrative embodiment, Figure 1 and Figure 2 As shown, the first gas flow meter 31 includes but is not limited to a gas mass flow controller. In detail, the body of the gas mass flow controller is mounted on the partition 2. Further, the partition 2 is connected to the display part (such as Figure 2 A through hole (such as a substantially rectangular through hole) is provided at a position corresponding to the display screen shown in the figure, so that the display screen of the gas mass flow controller is exposed on the partition 2 and can be observed by the calibration personnel.

[0061] In an illustrative embodiment, the gas mass flow controller includes but is not limited to being configured with an accuracy level of 1.0. Further, the flow range of the gas mass flow controller includes but is not limited to being configured as (1-50) L / min, and the maximum working pressure includes but is not limited to being configured as 3.0 MPa.

[0062] In an illustrative embodiment, Figure 2 As shown, the calibration mechanism 3 includes but is not limited to being configured with two first gas flow meters 31. In detail, the two first gas flow meters 31 are installed side by side on the partition 2. When calibrating the gas flow meter to be tested, one first gas flow meter 31 can be selected as a standard meter, and the other can be adapted to different types of gas flow meters to be tested.

[0063] According to the embodiments of the present utility model, Figure 2 As shown, the air inlet side of the first gas flow meter 31 is provided with an access pipe 311, and the air outlet side of the first gas flow meter 31 is provided with an outlet pipe 312. The ends of the access pipe 311 and the outlet pipe 312 provided with interfaces both pass through the partition 2 so that the interfaces are exposed in the first cavity above the partition 2.

[0064] In an illustrative embodiment, Figure 2 As shown, the inlet pipe 311 and the outlet pipe 312 include but are not limited to being arranged on both sides of the first gas flow meter 31. In detail, the inlet pipe 311 and the outlet pipe 312 include but are not limited to being configured as an L-shaped elbow, the first end (such as Figure 2 The end close to the first gas flow meter 31 as shown in the figure) is connected to the inlet side or the outlet side of the first gas flow meter 31, and the second end (as shown in the figure) is connected to the inlet side or the outlet side of the first gas flow meter 31. Figure 2 The end facing away from the first gas flow meter 31 as shown passes through the through hole formed by the partition 2 to the upper part of the partition 2, and an interface is set on the second end.

[0065] In such an embodiment, the interface opening arrangement of the access pipe 311 and the lead-out pipe 312 is suitable for accessing the pipeline connected in series with the gas flow meter to be tested when testing the gas flow meter to be tested, thereby realizing online testing of the gas flow meter to be tested. It should be understood that the gas flow meter to be tested includes but is not limited to a micro gas flow meter (such as a gas float flow meter, a thermal gas mass flow meter, and any other gas flow meter suitable for calibration with the first gas flow meter 31 as a standard meter).

[0066] According to the embodiments of the present utility model, Figure 2 As shown, the compensation component is suitable for collecting temperature parameter information and / or pressure parameter information.

[0067] According to the embodiments of the present utility model, Figure 2 As shown, the compensation component includes a temperature detection module 32 arranged on the inlet pipe 311 and / or the outlet pipe 312 .

[0068] In an illustrative embodiment, Figure 2As shown, the compensation component includes but is not limited to having two temperature detection modules 32. In detail, the two temperature detection modules 32 are respectively arranged on the access pipe 311 and the outlet pipe 312 to obtain the temperature information of the inlet side and the outlet side of the first gas flow meter 31. Further, the temperature detection module 32 includes but is not limited to using a thermal resistor, the detection end of the thermal resistor is arranged in the access pipe 311 and the outlet pipe 312, and the output end is suitable for communication connection with the control component. Among them, the thermal resistor includes but is not limited to using a Class A thermal resistor.

[0069] In an illustrative embodiment, Figure 2 As shown, the partition 2 is also provided with a power supply plug 5 suitable for connecting the external mains power to the calibration mechanism 3 to supply power to the calibration equipment for the gas flow meter.

[0070] In an illustrative embodiment, Figure 2 As shown, the partition 2 is also provided with a heat dissipation fan 6, which is suitable for discharging a part of the heat generated by the operation of the equipment in the second cavity to outside the second cavity.

[0071] Figure 3 yes Figure 2 A schematic diagram of a pressure detection module connected to a calibration mechanism is shown.

[0072] According to the embodiments of the present utility model, Figures 1 to 3 As shown, the compensation component further includes at least one group of pressure detection modules 33, and one group includes multiple pressure detection modules 33. Among them, the multiple pressure detection modules 33 in the same group have different ranges, and in response to the pressure range in the pipeline of the gas flow meter to be tested connected to the first gas flow meter 31, the multiple pressure detection modules 33 select one to be connected to the pressure measuring port 313 on the access pipe 311 and / or the lead-out pipe 312.

[0073] In an illustrative embodiment, Figure 2 and Figure 3 As shown, the compensation component includes but is not limited to having two groups of pressure detection modules 33, each group includes but is not limited to configuring three pressure detection modules 33. In detail, the two groups of pressure detection modules 33 are symmetrically arranged on both sides of the partition 2 (such as Figure 2 In the upper left and lower right side of the figure, the multiple pressure detection modules 33 in each group are arranged side by side at intervals. Further, the pressure detection module 33 includes but is not limited to using a pressure transmitter, and the three pressure transmitters in the same group are configured with different ranges and / or precisions. Among them, the pressure transmitter includes but is not limited to using a 0.2-level pressure transmitter.

[0074] According to the embodiments of the present utility model, Figure 3As shown, the calibration equipment for the gas flow meter further includes a pressure measuring joint 34 , which is arranged at a position on the partition plate 2 corresponding to the pressure measuring port 313 .

[0075] In an illustrative embodiment, Figure 3 As shown, the pressure measuring joint 34 is arranged on the partition 2, preferably facing the pressure detection module 33 (i.e., the pressure transmitter), so that a shorter connecting pipe 35 can be configured when connected to the pressure detection module 33. The connecting pipe can be soft or hard to meet the connection and sealing requirements between the pressure measuring joint 34 and the pressure detection module 33. Further, the pressure measuring port provided by the access pipe 311 and the lead-out pipe 312 is arranged directly below the pressure measuring joint 34, so that after the pressure measuring joint 34 is connected to a certain pressure detection module 33, the pressure detection module 33 is connected to the access pipe 311 or the lead-out pipe 312 through the pressure measuring joint 34 and the pipeline.

[0076] Figure 4 yes Figure 2 Schematic diagram of the control components in the calibration mechanism shown.

[0077] According to the embodiments of the present utility model, Figure 4 As shown, the control component includes a control unit 4 and a collection module 7. The collection module 7 is connected to the signal output end of the first gas flow meter 31 and / or the compensation component, and the control unit 4 is connected to the signal output end of the collection module 7.

[0078] In an illustrative embodiment, the acquisition module 7 includes but is not limited to using an AI and / or AO acquisition card. Further, the control unit 4 includes but is not limited to using an industrial computer. The industrial computer can be an industrial touch-control integrated tablet computer with a touch screen, which is installed on the partition 2, and the touch screen is exposed in the opening formed by the partition 2.

[0079] In such an embodiment, when the first gas flowmeter 31 is connected to the installation pipeline of the gas flowmeter to be tested through the access pipe 311 and the outlet pipe 312, the detection ends of the temperature detection module 32 and the pressure detection module 33 are connected to the access pipe 311 and the outlet pipe 312, so as to obtain the pressure parameter information and temperature parameter information of the air inlet and the air outlet of the first gas flowmeter 31, and in combination with the flow information detected by the first gas flowmeter 31, the temperature parameter information and pressure parameter information of the first gas flowmeter 31 (i.e., the standard meter) and the gas flowmeter to be tested (i.e., the meter to be tested) are measured in real time. In response to the above information, the standard flow of the first gas flowmeter 31 and the measured flow of the gas flowmeter to be tested can be corrected by the built-in software of the control unit, so as to calculate the standard working condition, standard flow and the measured working condition, standard flow in real time, and form a calibration record.

[0080] It should be noted here that the software built into the control unit is not the key point of protection of the present invention, and any software in the art that can be used to compensate for flow information based on temperature parameter information and pressure parameter information can be selected and applied.

[0081] For example, calibration software written in C# may be used.

[0082] Furthermore, based on the configured software (i.e., calibration software), the obtained temperature parameter information, pressure parameter information, and flow information can also have at least one of the following functions: cumulative flow collection function, device sealing self-test function, standard flow standard condition and working condition switching function. In this way, the gas flow meter calibration equipment can be used to calibrate gas flow meters using air, nitrogen, oxygen, argon, carbon dioxide, and any other gas as the medium, so that it can be widely used in industrial production, medical and health care, and other fields.

[0083] The calibration process of the gas flow meter calibration equipment includes but is not limited to the following operations:

[0084] Operation S100: connecting the inlet pipe and the outlet pipe of the first gas flow meter to the pipeline connected in series with the gas flow meter to be tested, and arranging them upstream of the gas flow meter to be tested;

[0085] Operation S110: starting and pre-checking the control unit;

[0086] Operation S120: opening the valves configured on the inlet pipe and the outlet pipe, allowing the medium to pass through the first gas flow meter and the detected gas flow meter in sequence, and obtaining flow information and parameter information (including temperature parameter information and pressure parameter information) through the first gas flow meter and the compensation component;

[0087] Operation S130: The calibration personnel reads the instantaneous flow rate of the inspected gas flow meter through the flow rate information and parameter information and / or the result after compensation and correction of the flow rate information and parameter information, and records it to generate a calibration record.

[0088] In an illustrative embodiment, the calibration equipment for the gas flow meter also includes further obtaining any data such as indication error, repeatability and uncertainty based on the operation of the calibrator, and the above data and / or calibration records can also be directly connected to a printing device (such as a printer) for printing or storage.

[0089] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present invention. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present invention.

[0090] The embodiments of the present invention are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, a person skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A gas flow meter calibration device, characterized in that: include: Box body (1); A partition (2) is horizontally installed in the box (1) to separate the box (1) into a first cavity and a second cavity stacked up and down; A calibration mechanism (3), disposed in the second cavity, comprises: A first gas flow meter (31), wherein interfaces at the gas inlet side and the gas outlet side of the first gas flow meter (31) are arranged in the first cavity and are suitable for being detachably connected in series with a pipeline of an external gas flow meter to be tested, so as to be used as a standard meter to obtain flow information of the gas flow meter to be tested; a compensation component configured to obtain parameter information of an inlet side and / or an outlet side of the first gas flow meter (31); and The control component is adapted to collect and / or display the flow information and the parameter information.

2. The calibration device according to claim 1, characterized in that The inlet side of the first gas flow meter (31) is provided with an access pipe (311), and the outlet side of the first gas flow meter (31) is provided with an outlet pipe (312). The ends of the inlet pipe (311) and the outlet pipe (312) provided with interfaces both pass through the partition (2) so that the interfaces are exposed in the first cavity above the partition (2).

3. The calibration device according to claim 2, characterized in that The compensation component is suitable for collecting temperature parameter information and / or pressure parameter information.

4. The calibration device according to claim 3, characterized in that The compensation component comprises a temperature detection module (32) arranged on the inlet pipe (311) and / or the outlet pipe (312).

5. The calibration device according to claim 3, characterized in that The compensation component further comprises at least one group of pressure detection modules (33), wherein one group comprises a plurality of the pressure detection modules (33); Wherein, the plurality of pressure detection modules (33) in the same group have different measuring ranges, and in response to the pressure interval in the pipeline of the gas flow meter to be detected to which the first gas flow meter (31) is connected, the plurality of pressure detection modules (33) are selected to be connected to the pressure measuring port (313) on the access pipe (311) and / or the outlet pipe (312).

6. The calibration device according to claim 5, characterized in that It also comprises a pressure measuring joint (34), wherein the pressure measuring joint (34) is arranged at a position on the partition plate (2) corresponding to the pressure measuring port (313).

7. The calibration device according to claim 1, characterized in that The control component comprises a control unit (4) and a collection module (7), wherein the collection module (7) is connected to the signal output end of the first gas flow meter (31) and / or the compensation component, and the control unit (4) is connected to the signal output end of the collection module (7).

8. The calibration device according to any one of claims 1 to 7, characterized in that The body of the first gas flow meter (31) is installed in the second cavity, and the display part of the first gas flow meter (31) passes through the partition (2) so that the interface is exposed in the first cavity above the partition (2).

9. The calibration device according to any one of claims 1 to 7, characterized in that: The partition (2) is detachably mounted in the box (1), and at least a portion of the calibration mechanism (3) is mounted on the partition (2) so as to be taken out of and put into the box (1) along with the partition (2).

10. The calibration device according to any one of claims 1 to 7, characterized in that: The box body (1) comprises an upper shell (11) and a lower shell (12); One of the upper shell (11) and the lower shell (12) is suitable for installing the partition (2), and the other is used for sealing the first cavity located above the partition (2).

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