Double-plunger calibration device for flow meters

Abstract

The utility model discloses a double plunger calibration device for flowmeter, including the casing, the first cavity and the second cavity are formed in the casing, the first cavity is telescopically provided with the first plunger, the second cavity is telescopically provided with the second plunger, and the first plunger sliding seal assembly is in the first cavity, and the second plunger sliding seal assembly is in the second cavity, be provided with the import and the export on the casing, the import is connected with the water pipe, and the export is connected with the water outlet pipe. The utility model solves the structure of the plunger of the calibration device of existing, and its adjustable range is limited, if the situation of the larger adjustment range can be completed happens, then it is difficult to satisfy the work demand, and the calibration work cannot be completed.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace metrology technology, specifically relating to a dual-plunger calibration device for flow meters. Background Technology

[0002] In the aerospace field, flow meters used in core power components such as engines require high accuracy. Therefore, their accuracy needs to be frequently tested to ensure it meets standards. If a problem is found, calibration is necessary. Failure to calibrate will hinder the completion of aerospace missions, necessitating replacement to ensure they can consistently perform demanding and demanding tasks.

[0003] Because the accuracy calibration of various flow meters is required, the workload is relatively large. However, the plunger of the existing calibration device is generally a single structure, and its adjustable range is limited. If a large adjustment range is required to complete the calibration, it is difficult to meet the work requirements and the calibration work cannot be completed. Utility Model Content

[0004] This utility model provides a dual-plunger calibration device for flow meters, which solves the problem that existing calibration devices generally have a single plunger structure, which has a limited adjustable range. If a larger adjustment range is required to complete the calibration, it is difficult to meet the work requirements and cannot complete the calibration work.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a dual-plunger calibration device for a flow meter, comprising a housing, wherein a first cavity and a second cavity are formed within the housing, a first plunger is retractably disposed within the first cavity, and a second plunger is retractably disposed within the second cavity, the first plunger being slidably and sealingly assembled within the first cavity, and the second plunger being slidably and sealingly assembled within the second cavity; the housing is provided with an inlet and an outlet, the inlet being externally connected to a water inlet pipe, and the outlet being externally connected to a water outlet pipe.

[0006] As a preferred technical solution of this utility model, one end of the first plunger is connected to a first connector.

[0007] As a preferred technical solution of this utility model, one end of the second plunger is connected to a second connector.

[0008] As a preferred technical solution of this utility model, a first sealing ring is provided between the first plunger and the first cavity.

[0009] As a preferred embodiment of the present invention, a second sealing ring is provided between the second plunger and the second cavity.

[0010] As a preferred technical solution of this utility model, the first cavity and the second cavity are arranged in parallel or at a certain angle.

[0011] As a preferred technical solution of this utility model, the first cavity and the second cavity are arranged at 90°.

[0012] As a preferred embodiment of this invention, the first plunger and the second plunger have the same length.

[0013] As a preferred embodiment of this invention, the first plunger and the second plunger have different lengths.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a dual-plunger calibration device for flow meters. Depending on different operating conditions, it allows for the selection of one plunger or the simultaneous use of both plungers to change the gas pressure within the casing, thereby achieving flow rate regulation. This significantly expands the regulation range and can meet the needs of various flow meters. Furthermore, this dual-plunger calibration device for flow meters has a simple overall structure, low manufacturing cost, and convenient testing and calibration, making it a promising candidate for market promotion and application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first embodiment of a dual-plunger calibration device for a flow meter according to the present invention.

[0016] Figure 2 This is a schematic diagram of the second embodiment of a dual-plunger calibration device for a flow meter according to the present invention.

[0017] In the picture: 1. Shell; 2. First connector; 3. First plunger; 4. First cavity; 5. Second connector; 6. Second plunger; 7. Second cavity; 8. Second sealing ring; 9. Imports; 10. First sealing ring. Detailed Implementation

[0018] The technical solution of this utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1 like Figure 1As shown, a dual-plunger calibration device for a flow meter according to this utility model includes a housing 1, in which a first cavity 4 and a second cavity 7 are formed. A first plunger 3 is retractably disposed in the first cavity 4, and a second plunger 6 is retractably disposed in the second cavity 7. The first plunger 3 is slidably and sealingly assembled in the first cavity 4, and the second plunger 6 is slidably and sealingly assembled in the second cavity 7. An inlet 9 and an outlet are provided on the housing 1. A water inlet pipe is connected to the inlet 9, and a water outlet pipe is connected to the outlet.

[0020] Example 1: The working principle of a dual-plunger calibration device for a flow meter according to this utility model is as follows: During operation, the inlet 9 on the outer casing 1 is connected to the inlet pipe, and the outlet on the outer casing 1 is connected to the outlet pipe. Both the inlet and outlet pipes are connected to the fluid source, and the flow meter to be calibrated is connected to either the inlet or outlet pipe. Depending on the operating conditions, the corresponding first plunger 3 and / or second plunger 6 are driven to move, changing the air pressure inside the casing 1, causing fluid from the fluid source to flow in through the inlet 9 and out through the outlet. The flow meter reading is compared with the reading of the fluid sensor installed at the outlet to determine if there is a deviation. If a deviation exists, the flow meter is calibrated to compensate for the difference; if not, the flow meter's accuracy is acceptable. After calibration, the difference between the flow meter reading and the fluid sensor reading is compared again until the flow meter reading meets the requirements. At this point, the flow meter's accuracy is finally calibrated.

[0021] This utility model discloses a dual-plunger calibration device for flow meters. Depending on different operating conditions, it can select to use one plunger or use two plungers working together to change the gas pressure inside the housing, thereby achieving a certain flow rate adjustment. This greatly expands the adjustment range and can meet the needs of different flow meters.

[0022] This utility model discloses a dual-plunger calibration device for flow meters, which has a simple overall structure, low manufacturing cost, and convenient testing and calibration, and has good prospects for market promotion and application.

[0023] Example 2 like Figure 1 As shown in Embodiment 1, Embodiment 2, a dual-plunger calibration device for a flow meter of this utility model, also includes a housing 1. A first cavity 4 and a second cavity 7 are formed inside the housing 1. A first plunger 3 is retractably disposed in the first cavity 4, and a second plunger 6 is retractably disposed in the second cavity 7. The first plunger 3 is slidably and sealed in the first cavity 4, and the second plunger 6 is slidably and sealed in the second cavity 7. An inlet 9 and an outlet are provided on the housing 1. A water inlet pipe is connected to the inlet 9, and a water outlet pipe is connected to the outlet.

[0024] Unlike Embodiment 1, in Embodiment 2, a dual-plunger calibration device for a flow meter of this utility model, one end of the first plunger 3 is connected to a first connector 2, which can be a cylinder to drive the first plunger 3 to move, making the operation more convenient.

[0025] Example 2: The working principle of a dual-plunger calibration device for a flow meter according to this utility model is as follows: During operation, the inlet 9 on the outer casing 1 is connected to the inlet pipe, and the outlet on the outer casing 1 is connected to the outlet pipe. Both the inlet and outlet pipes are connected to the fluid source, and the flow meter to be calibrated is connected to either the inlet or outlet pipe. Depending on the operating conditions, the corresponding first plunger 3 and / or second plunger 6 are driven to move, changing the air pressure inside the casing 1, causing fluid from the fluid source to flow in through the inlet 9 and out through the outlet. The flow meter reading is compared with the reading of the fluid sensor installed at the outlet to determine if there is a deviation. If a deviation exists, the flow meter is calibrated to compensate for the difference; if not, the flow meter's accuracy is acceptable. After calibration, the difference between the flow meter reading and the fluid sensor reading is compared again until the flow meter reading meets the requirements. At this point, the flow meter's accuracy is finally calibrated.

[0026] This utility model discloses a dual-plunger calibration device for flow meters. Depending on different operating conditions, it can select to use one plunger or use two plungers working together to change the gas pressure inside the housing, thereby achieving a certain flow rate adjustment. This greatly expands the adjustment range and can meet the needs of different flow meters.

[0027] This utility model discloses a dual-plunger calibration device for flow meters, which has a simple overall structure, low manufacturing cost, and convenient testing and calibration, and has good prospects for market promotion and application.

[0028] Example 3 like Figure 1 As shown in Embodiment 2, Embodiment 3, a dual-plunger calibration device for a flow meter according to this utility model, also includes a housing 1. A first cavity 4 and a second cavity 7 are formed within the housing 1. A first plunger 3 is retractably disposed within the first cavity 4, and a second plunger 6 is retractably disposed within the second cavity 7. The first plunger 3 is slidably and sealingly assembled within the first cavity 4, and the second plunger 6 is slidably and sealingly assembled within the second cavity 7. The housing 1 is provided with an inlet 9 and an outlet. An inlet pipe is connected to the inlet 9, and an outlet pipe is connected to the outlet. One end of the first plunger 3 is connected to a first connector 2.

[0029] Unlike Embodiment 2, in Embodiment 3, a dual-plunger calibration device for a flow meter according to this utility model, one end of the second plunger 6 is connected to a second connector 5, which can be a cylinder to drive the second plunger 6 to move, making the operation more convenient.

[0030] Example 3: The working principle of a dual-plunger calibration device for a flow meter according to this utility model is as follows: During operation, the inlet 9 on the outer casing 1 is connected to the inlet pipe, and the outlet on the outer casing 1 is connected to the outlet pipe. Both the inlet and outlet pipes are connected to the fluid source, and the flow meter to be calibrated is connected to either the inlet or outlet pipe. Depending on the operating conditions, the corresponding first plunger 3 and / or second plunger 6 are driven to move, changing the air pressure inside the casing 1, causing fluid from the fluid source to flow in through the inlet 9 and out through the outlet. The flow meter reading is compared with the reading of the fluid sensor installed at the outlet to determine if there is a deviation. If a deviation exists, the flow meter is calibrated to compensate for the difference; if not, the flow meter's accuracy is acceptable. After calibration, the difference between the flow meter reading and the fluid sensor reading is compared again until the flow meter reading meets the requirements. At this point, the flow meter's accuracy is finally calibrated.

[0031] This utility model discloses a dual-plunger calibration device for flow meters. Depending on different operating conditions, it can select to use one plunger or use two plungers working together to change the gas pressure inside the housing, thereby achieving a certain flow rate adjustment. This greatly expands the adjustment range and can meet the needs of different flow meters.

[0032] This utility model discloses a dual-plunger calibration device for flow meters, which has a simple overall structure, low manufacturing cost, and convenient testing and calibration, and has good prospects for market promotion and application.

[0033] Example 4 like Figure 1 As shown in Example 3, Example 4, a dual-plunger calibration device for a flow meter according to this utility model, also includes a housing 1. A first cavity 4 and a second cavity 7 are formed within the housing 1. A first plunger 3 is retractably disposed within the first cavity 4, and a second plunger 6 is retractably disposed within the second cavity 7. The first plunger 3 is slidably and sealingly assembled within the first cavity 4, and the second plunger 6 is slidably and sealingly assembled within the second cavity 7. The housing 1 is provided with an inlet 9 and an outlet. An inlet pipe is connected to the inlet 9, and an outlet pipe is connected to the outlet. One end of the first plunger 3 is connected to a first connector 2, and one end of the second plunger 6 is connected to a second connector 5.

[0034] Unlike Embodiment 3, in Embodiment 4, a dual-plunger calibration device for a flow meter according to this utility model is provided with a first sealing ring 10 between the first plunger 3 and the first cavity 4, and a second sealing ring 8 between the second plunger 6 and the second cavity 7, which can prevent liquid and gas leakage and thus prevent inaccurate testing.

[0035] Example 4: The working principle of a dual-plunger calibration device for a flow meter according to this utility model is as follows: During operation, the inlet 9 on the outer casing 1 is connected to the inlet pipe, and the outlet on the outer casing 1 is connected to the outlet pipe. Both the inlet and outlet pipes are connected to the fluid source, and the flow meter to be calibrated is connected to either the inlet or outlet pipe. Depending on the operating conditions, the corresponding first plunger 3 and / or second plunger 6 are driven to move, changing the air pressure inside the casing 1, causing fluid from the fluid source to flow in through the inlet 9 and out through the outlet. The flow meter reading is compared with the reading of the fluid sensor installed at the outlet to determine if there is a deviation. If a deviation exists, the flow meter is calibrated to compensate for the difference; if not, the flow meter's accuracy is acceptable. After calibration, the difference between the flow meter reading and the fluid sensor reading is compared again until the flow meter reading meets the requirements. At this point, the flow meter's accuracy is finally calibrated.

[0036] This utility model discloses a dual-plunger calibration device for flow meters. Depending on different operating conditions, it can select to use one plunger or use two plungers working together to change the gas pressure inside the housing, thereby achieving a certain flow rate adjustment. This greatly expands the adjustment range and can meet the needs of different flow meters.

[0037] This utility model discloses a dual-plunger calibration device for flow meters, which has a simple overall structure, low manufacturing cost, and convenient testing and calibration, and has good prospects for market promotion and application.

[0038] Example 5 like Figure 1 As shown in Example 4, Example 5, a dual-plunger calibration device for a flow meter according to this utility model, also includes a housing 1. A first cavity 4 and a second cavity 7 are formed within the housing 1. A first plunger 3 is retractably disposed within the first cavity 4, and a second plunger 6 is retractably disposed within the second cavity 7. The first plunger 3 is slidably and sealingly assembled within the first cavity 4, and the second plunger 6 is slidably and sealingly assembled within the second cavity 7. The housing 1 is provided with an inlet 9 and an outlet. An inlet pipe is connected to the inlet 9, and an outlet pipe is connected to the outlet. One end of the first plunger 3 is connected to a first connector 2, and one end of the second plunger 6 is connected to a second connector 5. A first sealing ring 10 is provided between the first plunger 3 and the first cavity 4, and a second sealing ring 8 is provided between the second plunger 6 and the second cavity 7.

[0039] Unlike Embodiment 4, in Embodiment 5, a dual-plunger calibration device for a flow meter according to this utility model, the first cavity 4 and the second cavity 7 can be arranged in parallel or at a certain angle. Preferably, the first cavity 4 and the second cavity 7 are arranged at a certain angle, with a 90-degree arrangement chosen, which can save installation space.

[0040] Example 5: A dual-plunger calibration device for a flow meter according to this utility model, the working principle of which is as follows: During operation, the inlet 9 on the outer casing 1 is connected to the inlet pipe, and the outlet on the outer casing 1 is connected to the outlet pipe. Both the inlet and outlet pipes are connected to the fluid source, and the flow meter to be calibrated is connected to either the inlet or outlet pipe. Depending on the operating conditions, the corresponding first plunger 3 and / or second plunger 6 are driven to move, changing the air pressure inside the casing 1, causing fluid from the fluid source to flow in through the inlet 9 and out through the outlet. The flow meter reading is compared with the reading of the fluid sensor installed at the outlet to determine if there is a deviation. If a deviation exists, the flow meter is calibrated to compensate for the difference; if not, the flow meter's accuracy is acceptable. After calibration, the difference between the flow meter reading and the fluid sensor reading is compared again until the flow meter reading meets the requirements. At this point, the flow meter's accuracy is finally calibrated.

[0041] This utility model discloses a dual-plunger calibration device for flow meters. Depending on different operating conditions, it can select to use one plunger or use two plungers working together to change the gas pressure inside the housing, thereby achieving a certain flow rate adjustment. This greatly expands the adjustment range and can meet the needs of different flow meters.

[0042] This utility model discloses a dual-plunger calibration device for flow meters, which has a simple overall structure, low manufacturing cost, and convenient testing and calibration, and has good prospects for market promotion and application.

[0043] Example 6 like Figure 1 As shown in Example 5, Example 6, a dual-plunger calibration device for a flow meter according to this utility model, also includes a housing 1. A first cavity 4 and a second cavity 7 are formed within the housing 1. A first plunger 3 is retractably disposed within the first cavity 4, and a second plunger 6 is retractably disposed within the second cavity 7. The first plunger 3 is slidably and sealingly assembled within the first cavity 4, and the second plunger 6 is slidably and sealingly assembled within the second cavity 7. The housing 1 has an inlet 9 and an outlet. An inlet pipe is connected to the inlet 9, and an outlet pipe is connected to the outlet. One end of the first plunger 3 is connected to a first connector 2, and one end of the second plunger 6 is connected to a second connector 5. A first sealing ring 10 is disposed between the first plunger 3 and the first cavity 4, and a second sealing ring 8 is disposed between the second plunger 6 and the second cavity 7. The first cavity 4 and the second cavity 7 can be arranged in parallel or at a certain angle, preferably at a 90-degree angle.

[0044] Unlike Example 5, in Example 6, a dual-plunger calibration device for a flowmeter according to this utility model, such as... Figure 1As shown, the first plunger 3 and the second plunger 6 are of the same length, and their adjustable ranges are identical. Or as... Figure 2 As shown, the first plunger 3 and the second plunger 6 have different lengths, and therefore their adjustment ranges are different. This allows for selection of either the first plunger 3 or the second plunger 6, or both, to work together, depending on different operating conditions.

[0045] Example 6: The working principle of a dual-plunger calibration device for a flow meter according to this utility model is as follows: During operation, the inlet 9 on the outer casing 1 is connected to the inlet pipe, and the outlet on the outer casing 1 is connected to the outlet pipe. Both the inlet and outlet pipes are connected to the fluid source, and the flow meter to be calibrated is connected to either the inlet or outlet pipe. Depending on the operating conditions, the corresponding first plunger 3 and / or second plunger 6 are driven to move, changing the air pressure inside the casing 1, causing fluid from the fluid source to flow in through the inlet 9 and out through the outlet. The flow meter reading is compared with the reading of the fluid sensor installed at the outlet to determine if there is a deviation. If a deviation exists, the flow meter is calibrated to compensate for the difference; if not, the flow meter's accuracy is acceptable. After calibration, the difference between the flow meter reading and the fluid sensor reading is compared again until the flow meter reading meets the requirements. At this point, the flow meter's accuracy is finally calibrated.

[0046] This utility model discloses a dual-plunger calibration device for flow meters. Depending on different operating conditions, it can select to use one plunger or use two plungers working together to change the gas pressure inside the housing, thereby achieving a certain flow rate adjustment. This greatly expands the adjustment range and can meet the needs of different flow meters.

[0047] This utility model discloses a dual-plunger calibration device for flow meters, which has a simple overall structure, low manufacturing cost, and convenient testing and calibration, and has good prospects for market promotion and application.

Claims

1. A dual-plunger calibration device for flow meters, characterized in that, The device includes a housing (1), in which a first cavity (4) and a second cavity (7) are formed. A first plunger (3) is retractably disposed in the first cavity (4), and a second plunger (6) is retractably disposed in the second cavity (7). The first plunger (3) is slidably and sealingly assembled in the first cavity (4), and the second plunger (6) is slidably and sealingly assembled in the second cavity (7). The housing (1) is provided with an inlet (9) and an outlet. The inlet (9) is connected to an external water inlet pipe, and the outlet is connected to an external water outlet pipe.

2. The dual-plunger calibration device for flow meters according to claim 1, characterized in that, One end of the first plunger (3) is connected to the first connector (2).

3. The dual-plunger calibration device for flow meters according to claim 2, characterized in that, One end of the second plunger (6) is connected to a second connector (5).

4. The dual-plunger calibration device for flow meters according to claim 3, characterized in that, A first sealing ring (10) is provided between the first plunger (3) and the first cavity (4).

5. The dual-plunger calibration device for flow meters according to claim 4, characterized in that, A second sealing ring (8) is provided between the second plunger (6) and the second cavity (7).

6. The dual-plunger calibration device for flow meters according to claim 5, characterized in that, The first cavity (4) and the second cavity (7) are arranged in parallel or at a certain angle.

7. The dual-plunger calibration device for flow meters according to claim 6, characterized in that, The first cavity (4) and the second cavity (7) are arranged at 90°.

8. The dual-plunger calibration device for flow meters according to claim 7, characterized in that, The first plunger (3) and the second plunger (6) have the same length.

9. The dual-plunger calibration device for a flow meter according to claim 8, characterized in that, The first plunger (3) and the second plunger (6) have different lengths.

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