Calibration and measurement device for vehicle-mounted gas flowmeter

Abstract

The invention relates to the technical field of calibration and detection devices, in particular to a vehicle-mounted gas flowmeter calibration and measurement device which comprises a vehicle body, and a compartment is arranged on the outer wall of the vehicle body. By turning on a switch of the controller, the electric control air cylinder is controlled to operate, the electric control air cylinder pushes the limiting base to drive the connecting pipe to transversely move, a sealing gasket abuts against a port of the gas flow detector for fixed sealing, meanwhile, the clamping assembly drives the clamping block to transversely slide, and flange plates and bolts are not needed for installation; the interface size does not need to be considered; a controller switch is turned on, a driving motor is controlled to operate, a threaded rod is made to rotate through a series of transmission, and a positioning bottom plate is driven to transversely move so as to adjust the position of a clamping block; the clamping block is pushed to synchronously clamp and fix the gas flow detector through the rotating rod, the connecting plate and the like, so that the gas flow detector and the connecting pipe are aligned to keep coaxiality.

Description

Technical Field

[0001] This invention relates to the field of calibration and testing device technology, specifically to a vehicle-mounted gas flow meter calibration and measurement device. Background Technology

[0002] A gas flow calibration device is a metrological instrument used to test and calibrate the performance of gas flow meters. It achieves accurate transmission of flow rate values ​​through dynamic weighing methods (such as GB / T 17612 standard) or standard meter methods (such as sonic nozzles). Its core principles include: measuring the change in gas mass within a container of known volume (pVTt method), or comparing the data of the instrument under test with that of a standard meter (standard meter method). The device typically consists of a weighing sensor, a temperature compensation system, and a data acquisition module. It supports multiple interface inputs (pulse / 4-20mA) and its measurement range covers micro-flow rates (0.005 m³ / h) to ultra-large flow rates (20000 m³ / h). This device is widely used in energy metering, industrial gas production, and energy conservation and emission reduction fields to ensure that the repeatability, linearity, and other indicators of the flow meter meet the requirements. However, there are multiple standards for gas flow meters, resulting in different interface sizes. When calibrating and testing gas flow meters, current calibration and testing devices require different adapter interfaces for different sizes of gas flow meters. Furthermore, the coaxiality deviation between the gas flow meter and the calibration and testing device directly affects the calibration results. If the axis offset exceeds ±1mm during installation, it may cause excessive error in the low-flow-rate range, or even lead to misjudgment during calibration. When installing a gas flow meter, it needs to be moved and aligned. Current lifting devices are manually operated, making it difficult to align and install the gas flow meter with one hand, resulting in time-consuming and labor-intensive installation.

[0003] Therefore, a vehicle-mounted gas flow meter calibration and measurement device is needed to improve the above-mentioned problems. Summary of the Invention

[0004] To address the issue that current gas flow calibration devices require different adapters for different sizes of gas flow meters when calibrating gas flow meters, this invention provides a vehicle-mounted gas flow meter calibration measurement device to solve the aforementioned problem.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A vehicle-mounted gas flow meter calibration and measurement device includes a vehicle body, a compartment provided on the outer wall of the vehicle body, a mounting bracket installed on the inner wall of the compartment, a stable gas source installed on the outer wall of the mounting bracket, a flow regulating valve installed on the outer wall of the mounting bracket, a vortex flow sensor installed on the outer wall of the mounting bracket, a temperature and pressure instrument sensor installed on the outer wall of the mounting bracket, a vacuum pump installed on the inner wall of the mounting bracket, and a controller installed on the outer wall of the mounting bracket. The stable air source, flow regulating valve, vortex flow sensor, temperature and pressure instrument sensor and air pump are connected by an air pipe. A fixing component is installed at one end of the air pipe, a clamping component is installed on one side of the air pipe and on the outer wall of the fixing component, and a lifting component is installed on one side of the mounting bracket and on the outer wall of the mounting bracket.

[0006] As a preferred embodiment of the present invention, the fixing component includes a mounting plate, wherein two sets of mounting plates are provided and are respectively located on the opposite outer walls of the mounting bracket. An air pipe is connected to the inner wall of the mounting plate, and a connecting pipe is slidably connected to the inner wall of the air pipe. A limiting base is installed at one end of the connecting pipe, and a sealing gasket is embedded at the port of the limiting base. The sealing gasket is made of sealing rubber material. An electrically controlled cylinder is installed at the corner of the mounting plate, wherein four electrically controlled cylinders are provided and are respectively located at the corner of the mounting plate. One end of the electrically controlled cylinder is connected to the limiting base via a connecting block.

[0007] As a preferred embodiment of the present invention, the clamping assembly includes a positioning plate and a limiting plate. The positioning plate is installed on the outer wall of the connecting pipe, and a drive motor is installed on the outer wall of the positioning plate. A drive gear is installed on the drive shaft of the drive motor. A ring gear is rotatably connected to the outer wall of the connecting pipe, and a drive gear is meshed on the outer wall of the ring gear.

[0008] As a preferred embodiment of the present invention, two limiting plates are provided and are respectively located on the opposite outer walls of the limiting base. A threaded rod is rotatably connected to the outer wall of the limiting plate. A driven gear is installed at one end of the threaded rod. A ring gear is meshed on the outer wall of the driven gear. The driven gear is located on one side of the driving gear, and four driven gears are provided and are respectively located on the outer wall of the ring gear.

[0009] As a preferred embodiment of the present invention, a limiting guide rod is symmetrically arranged on one side of the threaded rod and on the outer wall of the limiting plate. A positioning base plate is slidably connected to the outer wall of the limiting guide rod. A threaded rod is threadedly connected to the inner wall of the positioning base plate. A limiting groove is formed on the outer wall of the positioning base plate. Two sets of limiting grooves are provided and are respectively located on the outer wall of the positioning base plate. A positioning rod is slidably connected to the inner wall of the limiting groove. A connecting plate is rotatably connected to the outer wall of the positioning rod.

[0010] As a preferred embodiment of the present invention, a clamping block is mounted on one end of the connecting plate via a rotating rod. Two sets of rotating rods are provided and located on opposite outer walls of the clamping blocks, and the rotating rods and clamping blocks are connected by a rotatable connection. A clamping cylinder is rotatably connected to the outer wall of the clamping block, and one end of the clamping cylinder is rotatably connected to the bottom outer wall of the positioning base. A gas flow detector is mounted on the opposite outer wall of the limiting base, and four clamping blocks are provided and located on the outer wall of the gas flow detector.

[0011] As a preferred embodiment of the present invention, the lifting assembly includes a fixed bracket, which is installed on the inner wall of the carriage and located on one side of the mounting bracket. Infrared ranging sensors are installed sequentially from front to back on the bottom outer wall of the fixed bracket.

[0012] As a preferred embodiment of the present invention, a support rod is slidably connected to the opposite outer wall of the fixed bracket, a lifting plate is installed at one end of the support rod, a lifting cylinder is installed at the bottom of the lifting plate, and the lifting cylinder is embedded in the inner wall of the fixed bracket, and a limit clamp is installed on the top outer wall of the lifting plate.

[0013] As a preferred embodiment of the present invention, the controller is connected by wires to a stable air source, a flow regulating valve, a vortex flow sensor, a temperature and pressure instrument sensor, a vacuum pump, an electric control cylinder, a drive motor, a clamping cylinder, an infrared ranging sensor, and a lifting cylinder, and the connection method is electrical connection.

[0014] Compared with existing technologies, this invention enables the fixation of gas flow meters with different interface sizes by setting a fixing component in the vehicle-mounted gas flow meter calibration and measurement device. By turning on the controller switch, the electric cylinder is controlled to operate. The electric cylinder pushes the limit base to move the connecting pipe laterally, so that the sealing gasket abuts against the port of the gas flow meter for fixation and sealing. At the same time, the clamping component moves the clamping block laterally. No flange or bolts are required for installation, which is convenient and does not require consideration of interface size. This solves the problem that current gas flow calibration devices require different adapter interfaces to be changed during calibration and testing for gas flow meters of different sizes.

[0015] This invention enables simultaneous clamping and fixing of the gas flow meter from all four sides by incorporating a clamping assembly in the vehicle-mounted gas flow meter calibration and measurement device. This ensures the gas flow meter is aligned and coaxial. By turning on the controller switch, the drive motor rotates, causing the threaded rod to rotate via a series of transmissions. This drives the positioning base plate to move laterally to adjust the position of the clamping block. When the positioning base plate moves to the side of the gas flow meter, the controller controls the clamping cylinder to rotate, pushing the clamping block to simultaneously clamp and fix the gas flow meter via the rotating rod and connecting plate. This ensures the gas flow meter is aligned with the connecting pipe and maintains coaxiality. This solves the problem that coaxiality deviation between the gas flow meter and the calibration device directly affects the calibration results, potentially leading to excessive error in the indication of small flow rates or even misjudgment during calibration.

[0016] This invention, by incorporating a lifting component into the vehicle-mounted gas flow meter calibration and measurement device, enables foot-activated control of the lifting mechanism. This allows a single person to move and align the gas flow meter for installation. The gas flow meter is fixed to the base of the limiting clamp. The controller switch is turned on, and the parameters for raising and lowering the foot are set. The operator moves their foot directly below the infrared ranging sensor. The infrared ranging sensor generates data on the longitudinal movement of the foot and converts it into an electrical signal, which is transmitted to the controller. When the set parameters are reached, the controller activates the lifting cylinder, pushing the lifting plate longitudinally. The operator can then use both hands to move the gas flow meter for alignment and installation, achieving foot-controlled operation of the lifting cylinder. This solves the problem of current lifting devices requiring manual operation, which makes single-handed operation difficult and time-consuming during gas flow meter alignment and installation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mounting bracket structure of the present invention; Figure 3 This is a schematic diagram of the fixed component structure of the present invention; Figure 4 This is a schematic diagram of the clamping component structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A; Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B; Figure 7 This is a side view of the structure of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point C.

[0018] In the diagram: 1. Vehicle body; 2. Carriage compartment; 3. Mounting bracket; 4. Stable air source; 5. Flow regulating valve; 6. Vortex flow sensor; 7. Temperature and pressure instrument sensor; 8. Vacuum pump; 9. Controller; 10. Air pipe; 11. Fixing assembly; 1101. Mounting plate; 1102. Connecting pipe; 1103. Limiting base; 1104. Sealing gasket; 1105. Electric cylinder; 12. Clamping assembly; 1201. Positioning plate; 1202. Limiting plate; 1203. Drive motor; 1204. Drive gear; 1205. Ring 1206. Threaded gear; 1207. Driven gear; 1208. Limiting guide rod; 1209. Positioning base plate; 1210. Limiting slide groove; 1211. Positioning rod; 1212. Connecting plate; 1213. Rotating rod; 1214. Clamping block; 1215. Clamping cylinder; 1216. Gas flow detector; 13. Lifting assembly; 1301. Fixed bracket; 1302. Infrared ranging sensor; 1303. Support rod; 1304. Lifting plate; 1305. Lifting cylinder; 1306. Limiting clamping block. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example: Please refer to Figures 1-8 The vehicle-mounted gas flow meter calibration and measurement device shown includes a vehicle body 1, a compartment 2 provided on the outer wall of the vehicle body 1, a mounting bracket 3 installed on the inner wall of the compartment 2, a stable gas source 4 installed on the outer wall of the mounting bracket 3, a flow regulating valve 5 installed on the outer wall of the mounting bracket 3, a vortex flow sensor 6 installed on the outer wall of the mounting bracket 3, a temperature and pressure instrument sensor 7 installed on the outer wall of the mounting bracket 3, a vacuum pump 8 installed on the inner wall of the mounting bracket 3, and a controller 9 installed on the outer wall of the mounting bracket 3. The stable air source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7 and air pump 8 are connected by air pipe 10. One end of air pipe 10 is equipped with a fixing component 11. A clamping component 12 is installed on one side of air pipe 10 and on the outer wall of fixing component 11. A lifting component 13 is installed on one side of mounting bracket 3 and on the outer wall of mounting bracket 3.

[0021] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 The fixing component 11 includes a mounting plate 1101. Two sets of mounting plates 1101 are provided and are respectively located on the opposite outer walls of the mounting bracket 3. An air pipe 10 is connected to the inner wall of the mounting plate 1101. A connecting pipe 1102 is slidably connected to the inner wall of the air pipe 10. A limiting base 1103 is installed at one end of the connecting pipe 1102. A sealing gasket 1104 is embedded in the port of the limiting base 1103. The sealing gasket 1104 is made of sealing rubber material. An electric control cylinder 1105 is installed at the corner of the mounting plate 1101. Four electric control cylinders 1105 are provided and are respectively located at the corner of the mounting plate 1101. One end of the electric control cylinder 1105 is connected to the limiting base 1103 through a connecting block.

[0022] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The clamping assembly 12 includes a positioning plate 1201 and a limiting plate 1202. The positioning plate 1201 is installed on the outer wall of the connecting pipe 1102. A drive motor 1203 is installed on the outer wall of the positioning plate 1201. A drive gear 1204 is installed on the drive shaft of the drive motor 1203. A ring gear 1205 is rotatably connected to the outer wall of the connecting pipe 1102. The drive gear 1204 is meshed on the outer wall of the ring gear 1205. Two limiting plates 1202 are provided and are located on opposite outer walls of the limiting base 1103. A threaded rod 1206 is rotatably connected to the outer wall of the limiting plate 1202. A driven gear 1207 is installed at one end of the threaded rod 1206. The ring gear 1205 is meshed on the outer wall of the driven gear 1207. The driven gear 1207 is located on one side of the drive gear 1204. Four driven gears 1207 are provided and are located on the outer wall of the ring gear 1205. In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7A limiting guide rod 1208 is symmetrically arranged on one side of the threaded rod 1206 and on the outer wall of the limiting plate 1202. A positioning base plate 1209 is slidably connected to the outer wall of the limiting guide rod 1208. The threaded rod 1206 is threadedly connected to the inner wall of the positioning base plate 1209. A limiting groove 1210 is formed on the outer wall of the positioning base plate 1209. Two sets of limiting grooves 1210 are provided and are respectively located on the outer wall of the positioning base plate 1209. A positioning rod 1211 is slidably connected to the inner wall of the limiting groove 1210. A connecting plate 1212 is rotatably connected to the outer wall of the positioning rod 1211. One end of the clamping block 1214 is installed via a rotating rod 1213. Two sets of rotating rods 1213 are provided and are located on opposite outer walls of the clamping blocks 1214. The rotating rods 1213 and the clamping blocks 1214 are connected by a rotatable connection. A clamping cylinder 1215 is rotatably connected to the outer wall of the clamping block 1214. One end of the clamping cylinder 1215 is rotatably connected to the bottom outer wall of the positioning base plate 1209. A gas flow detector 1216 is installed on the opposite outer wall of the limiting base 1103. Four clamping blocks 1214 are provided and are located on the outer wall of the gas flow detector 1216.

[0023] In this embodiment, specific references Figure 1 , Figure 2 and Figure 8 The lifting assembly 13 includes a fixed bracket 1301, which is installed on the inner wall of the carriage 2 and is located on one side of the mounting bracket 3. Infrared ranging sensors 1302 are installed sequentially from front to back on the bottom outer wall of the fixed bracket 1301. A support rod 1303 is slidably connected to the opposite outer wall of the fixed bracket 1301. A lifting plate 1304 is installed at one end of the support rod 1303. A lifting cylinder 1305 is installed at the bottom of the lifting plate 1304 and is embedded in the inner wall of the fixed bracket 1301. A limit clamp 1306 is installed on the top outer wall of the lifting plate 1304.

[0024] The controller 9 is electrically connected to a stable air source 4, a flow regulating valve 5, a vortex flow sensor 6, a temperature and pressure instrument sensor 7, a vacuum pump 8, an electrically controlled cylinder 1105, a drive motor 1203, a clamping cylinder 1215, an infrared ranging sensor 1302, and a lifting cylinder 1305 via wires. This connection enables the device to be powered on, thereby allowing the controller 9 to control the operation of the stable air source 4, the flow regulating valve 5, the vortex flow sensor 6, the temperature and pressure instrument sensor 7, the vacuum pump 8, the electrically controlled cylinder 1105, the drive motor 1203, the clamping cylinder 1215, the infrared ranging sensor 1302, and the lifting cylinder 1305. Based on the above structural features and connection relationships, the controller 9 controls the stable gas source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7 and vacuum pump 8 to operate, which will cause the stable gas source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7 and vacuum pump 8 to operate, thereby detecting the gas flow detector 1216. Based on the aforementioned structural features and connection relationships, the infrared ranging sensor 1302 has a sensing distance of 0.1-10m, and the lifting cylinder 1305 has a stroke range of 150-200mm. To ensure personal safety and comply with regulations, vehicles cannot carry both people and goods during transportation. Therefore, no one is allowed to perform measurement operations in the equipment room during the journey. The equipment can only be used in a stable state. The purpose of being mounted on a vehicle is to facilitate the transportation and transfer of the equipment.

[0025] When the vehicle-mounted gas flow meter calibration and measurement device of this solution is working, the operator sets the trigger parameters for lifting the foot / lowering the foot and the operating parameters on the controller 9. Then, the controller 9 is connected to the stable gas source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7, air pump 8, electric cylinder 1105, drive motor 1203, clamping cylinder 1215, infrared distance sensor 1302 and lifting cylinder 1305 through wires. The device is powered on, and the controller 9 controls the stable gas source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7, air pump 8, electric cylinder 1105, drive motor 1203, clamping cylinder 1215, infrared distance sensor 1302 and lifting cylinder 1305 to operate. This device can only be used when the vehicle body 1 is in a stable state. After the vehicle body 1 is stabilized, the gas flow detector 1216 is placed on the base surface of the limiting clamp 1306 and fixed. Then, the controller 9 is turned on, and the parameters for raising the foot and lowering the foot are set. Then, the operator only needs to move the foot directly under the infrared ranging sensor 1302. At the same time, the infrared ranging sensor 1302 generates data on the longitudinal movement of the foot, which in turn generates an electrical signal that is transmitted to the controller 9 through the wire. When the set parameters are reached, the controller 9 will control the lifting cylinder 1305 to operate, which will push the lifting plate 1304 to move longitudinally. When the lifting plate 1304 moves upward through the limiting clamp 1306, the operator can use both hands to move the gas flow detector 1216 for alignment and installation, and use the foot to control the lifting cylinder 1305 to operate. This solves the problem that current lifting devices are manually operated and difficult to align and install the gas flow detector with one hand, which makes the installation time-consuming and laborious. By turning on the switch of controller 9, controller 9 controls the drive motor 1203 to operate, thereby causing the drive shaft of drive motor 1203 to drive the ring gear 1205 to rotate via drive gear 1204. This causes the ring gear 1205 to rotate on the outer wall of connecting pipe 1102. When the ring gear 1205 rotates, it drives the driven gear 1207 to rotate, which in turn drives the threaded rod 1206 to rotate. This causes the threaded rod 1206 to rotate on the outer wall of limiting plate 1202. When the threaded rod 1206 rotates, it drives the positioning base plate 1209 to move via the threaded connection, causing the positioning base plate 1209 to move laterally on the outer wall of limiting guide rod 1208 to adjust the position of clamping block 1214. When the positioning base plate 120... When the controller 9 moves to one side of the gas flow meter 1216, it will cause the clamping cylinder 1215 to operate, which will cause one end of the clamping cylinder 1215 to push the clamping block 1214 to move. This will cause the clamping block 1214 to apply a pushing force to the connecting plate 1212 through the rotating rod 1213, so that the connecting plate 1212 unfolds on the outer wall of the positioning rod 1211. This will cause the clamping blocks 1214 of the two clamping components 12 to clamp and fix the gas flow meter 1216 at the same time. The gas flow meter 1216 is simultaneously clamped and fixed in the middle by the four clamping blocks 1214, so that the gas flow meter 1216 and the connecting pipe 1102 are aligned and maintain coaxiality. This solves the problem that the coaxiality deviation between the gas flow meter and the calibration device will directly affect the calibration results, which may lead to excessive error in the small flow range, or even cause misjudgment in the calibration. An air pipe 10 is connected to the inner wall of the mounting plate 1101. A connecting pipe 1102 is slidably connected to the inner wall of the air pipe 10. A limiting base 1103 is installed at one end of the connecting pipe 1102. A sealing gasket 1104 is embedded in the port of the limiting base 1103. The sealing gasket 1104 is made of sealing rubber material. Four electrically controlled cylinders 1105 are installed at the corners of the mounting plate 1101. One end of the electrically controlled cylinder 1105 is connected to the limiting base 1103 via the connecting block. When the controller 9 is turned on, the controller 9 controls the electrically controlled cylinder 1105 to operate. This causes one end of the electrically controlled cylinder 1105 to push the limiting base 1103 to move laterally, which in turn causes the limiting base 1103 to move. The lateral movement of the connecting pipe 1102 causes it to move laterally against the outer wall of the gas pipe 10. This causes the sealing gasket 1104 on the outer wall of the limiting base 1103 to abut against the two side ports of the gas flow detector 1216 for a fixed seal. Furthermore, the lateral movement of the limiting plate 1202 driven by the limiting base 1103 causes the clamping assembly 12 to slide against the outer wall of the gas flow detector 1216. Since the sealing gasket 1104 on the outer wall of the limiting base 1103 abuts against the gas flow detector 1216 for a fixed seal, there is no need to use flanges and bolts for fixing, making installation easier and eliminating the need to consider the size of the interface. This solves the problem that current gas flow calibration devices require different adapter interfaces for different sizes of gas flow meters during calibration and testing. A stable gas source 4, a flow regulating valve 5, a vortex flow sensor 6, and a temperature and pressure sensor 7 are all installed on the outer wall of the mounting bracket 3. An air extractor 8 is installed on the inner wall of the mounting bracket 3. A controller 9 is installed on the outer wall of the mounting bracket 3. When the controller 9 is turned on, it controls the operation of the stable gas source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure sensor 7, and air extractor 8. This operation calibrates the gas flow detector 1216, and the controller 9 then displays the calibration results.

[0026] The stable air source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7, air pump 8, electrically controlled cylinder 1105, drive motor 1203, clamping cylinder 1215, infrared ranging sensor 1302, lifting cylinder 1305, and controller 9 used in this invention are all existing known electrical devices, and all can be directly purchased and used on the market. Their structure, circuit, and control principle are all existing known technologies. Therefore, the structure, circuit, and control principle of the stable air source 4, flow regulating valve 5, vortex flow sensor 6, temperature and pressure instrument sensor 7, air pump 8, electrically controlled cylinder 1105, drive motor 1203, clamping cylinder 1215, infrared ranging sensor 1302, lifting cylinder 1305, and controller 9 will not be described in detail here.

[0027] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted gas flow meter calibration and measurement device, comprising a vehicle body (1), characterized in that: A carriage (2) is provided on the outer wall of the vehicle body (1). A mounting bracket (3) is installed on the inner wall of the carriage (2). A stable air source (4) is installed on the outer wall of the mounting bracket (3). A flow regulating valve (5) is installed on the outer wall of the mounting bracket (3). A vortex flow sensor (6) is installed on the outer wall of the mounting bracket (3). A temperature and pressure instrument sensor (7) is installed on the outer wall of the mounting bracket (3). An air pump (8) is installed on the inner wall of the mounting bracket (3). A controller (9) is installed on the outer wall of the mounting bracket (3). The stable air source (4), flow regulating valve (5), vortex flow sensor (6), temperature and pressure instrument sensor (7) and air pump (8) are connected by an air pipe (10). A fixing component (11) is installed at one end of the air pipe (10). A clamping component (12) is installed on one side of the air pipe (10) and on the outer wall of the fixing component (11). A lifting component (13) is installed on one side of the mounting bracket (3) and on the outer wall of the mounting bracket (3).

2. The vehicle-mounted gas flow meter calibration and measurement device according to claim 1, characterized in that: The fixing component (11) includes a mounting plate (1101), which has two sets located on opposite outer walls of the mounting bracket (3). An air pipe (10) is connected to the inner wall of the mounting plate (1101), and a connecting pipe (1102) is slidably connected to the inner wall of the air pipe (10). A limiting base (1103) is installed at one end of the connecting pipe (1102), and a sealing gasket (1104) is embedded in the port of the limiting base (1103). The sealing gasket (1104) is made of sealing rubber material. An electric cylinder (1105) is installed at the corner of the mounting plate (1101). There are four electric cylinders (1105) located at the corner of the mounting plate (1101), and one end of the electric cylinder (1105) is connected to the limiting base (1103) via a connecting block.

3. The vehicle-mounted gas flow meter calibration and measurement device according to claim 2, characterized in that: The clamping assembly (12) includes a positioning plate (1201) and a limiting plate (1202). The positioning plate (1201) is installed on the outer wall of the connecting pipe (1102). A drive motor (1203) is installed on the outer wall of the positioning plate (1201). A drive gear (1204) is installed on the drive shaft of the drive motor (1203). A ring gear (1205) is rotatably connected to the outer wall of the connecting pipe (1102). The drive gear (1204) is meshed on the outer wall of the ring gear (1205).

4. The vehicle-mounted gas flow meter calibration and measurement device according to claim 3, characterized in that: Two limiting plates (1202) are provided and are respectively located on the opposite outer walls of the limiting base (1103). A threaded rod (1206) is rotatably connected to the outer wall of the limiting plate (1202). A driven gear (1207) is installed at one end of the threaded rod (1206). A ring gear (1205) is meshed on the outer wall of the driven gear (1207). The driven gear (1207) is located on one side of the driving gear (1204), and four driven gears (1207) are provided and are respectively located on the outer wall of the ring gear (1205).

5. The vehicle-mounted gas flow meter calibration and measurement device according to claim 4, characterized in that: A limiting guide rod (1208) is symmetrically arranged on one side of the threaded rod (1206) and on the outer wall of the limiting plate (1202). A positioning base plate (1209) is slidably connected to the outer wall of the limiting guide rod (1208). A threaded rod (1206) is threadedly connected to the inner wall of the positioning base plate (1209). A limiting groove (1210) is opened on the outer wall of the positioning base plate (1209). Two sets of limiting grooves (1210) are provided and are respectively located on the outer wall of the positioning base plate (1209). A positioning rod (1211) is slidably connected to the inner wall of the limiting groove (1210). A connecting plate (1212) is rotatably connected to the outer wall of the positioning rod (1211).

6. The vehicle-mounted gas flow meter calibration and measurement device according to claim 5, characterized in that: One end of the connecting plate (1212) is equipped with a clamping block (1214) via a rotating rod (1213). There are two sets of rotating rods (1213) located on opposite outer walls of the clamping blocks (1214). The rotating rods (1213) and the clamping blocks (1214) are connected by a rotating connection. A clamping cylinder (1215) is rotatably connected to the outer wall of the clamping block (1214). One end of the clamping cylinder (1215) is rotatably connected to the bottom outer wall of the positioning base plate (1209). A gas flow detector (1216) is installed on the opposite outer wall of the limiting base (1103). There are four clamping blocks (1214) located on the outer wall of the gas flow detector (1216).

7. The vehicle-mounted gas flow meter calibration and measurement device according to claim 6, characterized in that: The lifting assembly (13) includes a fixed bracket (1301) which is installed on the inner wall of the carriage (2) and is located on one side of the mounting bracket (3). Infrared ranging sensors (1302) are installed sequentially from front to back on the bottom outer wall of the fixed bracket (1301).

8. The vehicle-mounted gas flow meter calibration and measurement device according to claim 7, characterized in that: A support rod (1303) is slidably connected to the outer wall opposite to the fixed bracket (1301). A lifting plate (1304) is installed at one end of the support rod (1303). A lifting cylinder (1305) is installed at the bottom of the lifting plate (1304). The lifting cylinder (1305) is embedded in the inner wall of the fixed bracket (1301). A limit clamp (1306) is installed on the top outer wall of the lifting plate (1304).

9. The vehicle-mounted gas flow meter calibration and measurement device according to claim 8, characterized in that: The controller (9) is connected to a stable air source (4), a flow regulating valve (5), a vortex flow sensor (6), a temperature and pressure instrument sensor (7), a vacuum pump (8), an electric control cylinder (1105), a drive motor (1203), a clamping cylinder (1215), an infrared ranging sensor (1302), and a lifting cylinder (1305) via wires, and the connection method is electrical connection.

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