Gas flowmeter calibration device

Abstract

The utility model discloses a gas flow meter calibration device which comprises a calibration table, a first connecting pipe is installed on the calibration table through a first installation base, a first standard flow meter is arranged at one end of the first connecting pipe, a gas inlet pipe is arranged at the end, away from the first connecting pipe, of the first standard flow meter, and an electromagnetic valve is arranged on the gas inlet pipe. A detachable flowmeter body is arranged at the end, away from the first standard flowmeter, of the first connecting pipe, a second mounting base capable of moving left and right is further arranged on the calibration table, and a butt joint pipe matched with an air outlet of the flowmeter body in a butt joint mode is arranged on the second mounting base. A second standard flowmeter is arranged at the end, away from the flowmeter body, of the butt joint pipe. Compared with the prior art, the device has the advantages that through the adoption of a detachable flange connection system, the device not only realizes quick connection and disassembly among all parts, improves the maintenance efficiency and flexibility, but also facilitates calibration of flowmeter bodies with different lengths.

Description

Technical Field

[0001] The utility model relates to the technical field of gas flow meter calibration, in particular to a gas flow meter calibration device. Background Art

[0002] Gas flow measurement is an important parameter in energy metering. It is widely used in gas meters, natural gas meters, and heat meters for heating, etc., which are used for metering and charging. The above flow meters must be calibrated before they can be used. The prior art usually uses a fixed calibration device, which has a complex structure. The connections between the components are mostly welded or fixed, which makes the operation cumbersome and inefficient when maintenance, replacement or upgrading are required. In addition, the calibration devices in the prior art usually lack flexibility and cannot adapt to the calibration requirements of flow meter bodies of different lengths, which limits their scope of application. Therefore, the development of a gas flow calibration device with a simple structure, convenient operation and strong adaptability has become an urgent need for the current technological development. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a gas flow meter calibration device.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a gas flow meter calibration device, including a calibration platform, a first connecting pipe is installed on the calibration platform through a first mounting seat, a first standard flow meter is provided at one end of the first connecting pipe, an air intake pipe is provided at the end of the first standard flow meter away from the first connecting pipe, and an electromagnetic valve is provided on the air intake pipe, a detachable flow meter body is provided at the end of the first connecting pipe away from the first standard flow meter, a second mounting seat that can be moved left and right is also provided on the calibration platform, a docking tube that docks with the air outlet of the flow meter body is provided on the second mounting seat, and a second standard flow meter is provided at the end of the docking tube away from the flow meter body.

[0005] Furthermore, the first mounting seat and the second mounting seat both include a mounting seat body, the mounting seat body is provided with an arc-shaped placement groove, and the mounting seat body is provided with an arc-shaped clamp located above the arc-shaped placement groove through bolts.

[0006] Furthermore, an installation groove is provided on the calibration table, two rows of guide rails are provided in the installation groove, the bottom of the second mounting seat is slidably connected to the guide rails through a guide seat, a lead screw is also rotatably provided in the installation groove, and a driving seat is provided at the bottom of the second mounting seat which is threadedly connected to the lead screw.

[0007] Furthermore, a driving cavity is provided in the calibration platform, a driving shaft is rotatably provided in the driving cavity and the driving shaft is driven by a handle arranged at the front end of the calibration platform, a driving bevel gear is provided on the driving shaft, one end of the lead screw extends into the driving cavity and a driven bevel gear meshing with the driving bevel gear is provided at the end of the lead screw.

[0008] Furthermore, both ends of the first connecting pipe are provided with a first connecting flange, both ends of the butt-joint pipe are provided with a butt-joint flange, both ends of the first standard flowmeter are respectively connected to the flange plate at the end of the intake pipe and the first connecting flange at the end of the first connecting pipe through flange plates, both ends of the flowmeter body are respectively connected to the first connecting flange at the end of the first connecting pipe and the butt-joint flange at the end of the butt-joint pipe through flange plates, and the end of the second standard flowmeter is connected to the butt-joint flange at the end of the butt-joint pipe through a flange plate.

[0009] Furthermore, the end faces of the first connecting flange and the butt flange are both provided with sealing gaskets.

[0010] The advantages of the utility model compared with the prior art are: by adopting a detachable flange connection system, the device not only realizes the rapid connection and disassembly between the components, improves the maintenance efficiency and flexibility, but also ensures the stable installation of the first connecting pipe and the butt pipe through the designed arc placement groove and arc clamp, and prevents movement or loosening during the test. In addition, the device also introduces a second mounting seat that can be moved left and right, and through the precise control of the lead screw and the guide rail, the accurate docking between the flow meter body and the butt pipe is achieved, which is convenient for calibrating flow meter bodies of different lengths. These designs not only improve the accuracy and stability of calibration, but also significantly improve the adaptability and ease of operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a schematic diagram of the bottom structure of the utility model.

[0013] Figure 3 It is a partial structural schematic diagram of the flow meter body in the utility model.

[0014] Numbers in the figure: 1. calibration table, 2. first mounting seat, 3. first connecting pipe, 4. first standard flowmeter, 5. air inlet pipe, 6. solenoid valve, 7. flowmeter body, 8. second mounting seat, 9. docking pipe, 10. second standard flowmeter, 11. docking flange, 12. mounting seat body, 13. arc clamp, 14. mounting groove, 15. guide rail, 16. guide seat, 17. lead screw, 18. drive seat, 19. drive chamber, 20. drive shaft, 21. handle, 22. active bevel gear, 23. driven bevel gear, 24. first connecting flange. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0016] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0017] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0019] Combined with Figure 1 -Attached Figure 3 A gas flow meter calibration device comprises a calibration platform 1, on which a first connecting pipe 3 is mounted via a first mounting seat 2, a first standard flow meter 4 is arranged at one end of the first connecting pipe 3, an air inlet pipe 5 is arranged at the end of the first standard flow meter 4 away from the first connecting pipe 3, and an electromagnetic valve 6 is arranged on the air inlet pipe 5, a detachable flow meter body 7 is arranged at the end of the first connecting pipe 3 away from the first standard flow meter 4, a second mounting seat 8 which can be moved left and right is also arranged on the calibration platform 1, a docking pipe 9 which docks with the air outlet of the flow meter body 7 is arranged on the second mounting seat 8, and a second standard flow meter 10 is arranged at the end of the docking pipe 9 away from the flow meter body 7.

[0020] In one embodiment, the first mounting seat 2 and the second mounting seat 8 each include a mounting seat body 12, an arc-shaped placement groove is provided on the mounting seat body 12, and an arc-shaped clamp 13 located above the arc-shaped placement groove is provided on the mounting seat body 12 by bolts. The arc-shaped placement groove is tailored according to the diameter of the first connecting pipe 3 and the butt joint pipe 9 to ensure that they can be stably placed in the groove. The arc-shaped clamp 13 is installed on the mounting seat body 12 by bolts, and the first connecting pipe 3 or the butt joint pipe 9 can be tightly fixed on the mounting seat body 12 to prevent movement or loosening during the test process, thereby ensuring the accuracy of the test results.

[0021] In one embodiment, a mounting groove 14 is provided on the calibration table 1, and two rows of guide rails 15 are provided in the mounting groove 14. The bottom of the second mounting seat 8 is slidably connected to the guide rail 15 through a guide seat 16. A lead screw 17 is also rotatably provided in the mounting groove 14, and a driving seat 18 threadedly connected to the lead screw 17 is provided at the bottom of the second mounting seat 8.

[0022] In one embodiment, a driving chamber 19 is provided in the calibration platform 1, a driving shaft 20 is rotatably provided in the driving chamber 19, and the driving shaft 20 is driven by a handle 21 provided at the front end of the calibration platform 1, an active bevel gear 22 is provided on the driving shaft 20, one end of the lead screw 17 extends into the driving chamber 19, and a driven bevel gear 23 meshing with the active bevel gear 22 is provided at the end of the lead screw 17. The bottom of the second mounting seat 8 is slidably connected to the guide rail 15 through the guide seat 16 to ensure that it can move smoothly along the guide rail 15. The lead screw 17 is connected to the second mounting seat 8 through the driving seat 18, and when the lead screw 17 rotates, it can drive the second mounting seat 8 to move left and right on the guide rail 15. By adjusting the rotation speed and direction of the lead screw 17, the moving speed and position of the second mounting seat 8 can be accurately controlled, thereby ensuring the accurate docking between the flow meter body 7 and the docking pipe 9, so as to facilitate the calibration of the flow meter body 7 of different lengths.

[0023] In one embodiment, the gas flow calibration device significantly improves the disassembly of its components through a carefully designed flange connection system. Both ends of the first connecting pipe 3 are equipped with a first connecting flange 24, and both ends of the butt pipe 9 are provided with a butt flange 25, so that the first standard flowmeter 4, the flowmeter body 7 and the second standard flowmeter 10 can be quickly and firmly connected to the corresponding pipeline through the flange. This design not only ensures the sealing and stability of the connection during the flow calibration process, but also provides great convenience when maintenance, replacement or upgrading is required. The staff can easily achieve the rapid disassembly and installation of components such as the first connecting pipe 3, the butt pipe 9, the first standard flowmeter 4, the flowmeter body 7 and the second standard flowmeter 10 through simple operations, such as loosening or tightening bolts, thereby significantly improving the maintenance efficiency and flexibility of the equipment.

[0024] In one embodiment, sealing gaskets are provided on the end faces of the first connecting flange 24 and the butt flange 25. The sealing gaskets are designed to ensure good sealing at the connection and prevent gas leakage from affecting the accuracy of the calibration result.

[0025] In the specific implementation of the present application, the first connecting pipe 3 and the docking pipe 9 are first fixed on the first mounting seat 2 and the second mounting seat 8 respectively, and fixed by the corresponding arc clamp 13, and then the corresponding first standard flow meter 4, the second standard flow meter 10 and the intake pipe 5 are assembled into one, and one end of the flow meter body 7 to be calibrated is installed on the right end of the first connecting pipe 3, and the handle 21 is turned to drive the rotation of the drive shaft 20, and the drive shaft 20 drives the rotation of the active bevel gear 22 and the driven bevel gear 23, thereby driving the rotation of the lead screw 17, and the lead screw 17 drives the docking pipe 9 on the second mounting seat 8 to move toward the flow meter body 7. When the docking is completed, the two are connected as one by bolts, and then the gas source is connected to the intake pipe 5, and the solenoid valve 6 is started. When the solenoid valve 6 is energized and opened, the gas will flow in the entire pipeline, and the flow meter body 7 will be detected, and then compared and calibrated with the first standard flow meter 4 and the second standard flow meter 10, the calibration is more accurate.

[0026] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A gas flow meter calibration device, comprising a calibration platform (1), characterized in that: A first connecting pipe (3) is mounted on the calibration platform (1) via a first mounting seat (2); a first standard flow meter (4) is disposed at one end of the first connecting pipe (3); an air inlet pipe (5) is disposed at the end of the first standard flow meter (4) away from the first connecting pipe (3), and a solenoid valve (6) is disposed on the air inlet pipe (5); a detachable flow meter body (7) is disposed at the end of the first connecting pipe (3) away from the first standard flow meter (4); a second mounting seat (8) movable left and right is further disposed on the calibration platform (1); a docking pipe (9) docking with an air outlet of the flow meter body (7) is disposed on the second mounting seat (8); a second standard flow meter (10) is disposed at the end of the docking pipe (9) away from the flow meter body (7).

2. A gas flow meter calibration device according to claim 1, characterized in that: The first mounting seat (2) and the second mounting seat (8) both comprise a mounting seat body (12), the mounting seat body (12) being provided with an arc-shaped placement groove, and the mounting seat body (12) being provided with an arc-shaped clamp (13) located above the arc-shaped placement groove via bolts.

3. A gas flow meter calibration device according to claim 2, characterized in that: The calibration platform (1) is provided with a mounting groove (14), two rows of guide rails (15) are provided in the mounting groove (14), the bottom of the second mounting seat (8) is slidably connected to the guide rails (15) via a guide seat (16), a lead screw (17) is rotatably provided in the mounting groove (14), and a driving seat (18) threadedly connected to the lead screw (17) is provided at the bottom of the second mounting seat (8).

4. A gas flow meter calibration device according to claim 3, characterized in that: The calibration platform (1) is provided with a driving chamber (19), a driving shaft (20) is rotatably provided in the driving chamber (19), and the driving shaft (20) is driven by a handle (21) provided at the front end of the calibration platform (1), a driving bevel gear (22) is provided on the driving shaft (20), one end of the lead screw (17) extends into the driving chamber (19), and a driven bevel gear (23) meshing with the driving bevel gear (22) is provided at the end of the lead screw (17).

5. A gas flow meter calibration device according to claim 1, characterized in that: Both ends of the first connecting pipe (3) are provided with a first connecting flange (24), both ends of the butt-joint pipe (9) are provided with a butt-joint flange (11), both ends of the first standard flowmeter (4) are respectively connected to the flange at the end of the intake pipe (5) and the first connecting flange (24) at the end of the first connecting pipe (3) through flanges, both ends of the flowmeter body (7) are respectively connected to the first connecting flange (24) at the end of the first connecting pipe (3) and the butt-joint flange (11) at the end of the butt-joint pipe (9) through flanges, and the end of the second standard flowmeter (10) is connected to the butt-joint flange (11) at the end of the butt-joint pipe (9) through a flange.

6. A gas flow meter calibration device according to claim 5, characterized in that: The end surfaces of the first connecting flange (24) and the butt flange (11) are both provided with sealing gaskets.

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