Automatic leak detection device for gas flow meters

Abstract

The application provides an automatic leak detection device for a gas flowmeter, and relates to the technical field of flowmeters. The automatic leak detection device for the gas flowmeter comprises a main box and a conveying box. The conveying box is fixed to the left side of the main box. A main shaft pipe is arranged in the main box. Telescopic shaft seats and air pumps are respectively inserted and arranged on the left and right sides of the main shaft pipe. Telescopic shaft pipes are arranged between the main shaft pipe and the telescopic shaft seats. The application has the beneficial effect that the conveying of the flowmeter is completed through the feeding of the conveying table in cooperation with the air pump. In the process, the telescopic shaft pipes are driven by the feeding of the air pump to be adaptively docked with the gas flowmeter pipeline. The gas in the telescopic shaft pipes fills the separation grooves and the inner cavities of the gas flowmeter pipeline. The light beam change in the separation grooves between the receiving head and the transmitting head is used to determine the gas flow state, so that the automatic leak detection of the gas flowmeter is realized. Compared with the inflation measurement mode of the traditional flowmeter, the leak detection precision is improved.

Description

Technical Field

[0001] This invention relates to the field of flow meter technology, and specifically to an automatic leak detection device for a gas flow meter. Background Technology

[0002] Gas flow meters are one of the major categories of instruments in process automation instruments and devices. They are widely used in various fields such as metallurgy, power, coal, chemical, petroleum, transportation, construction, light textile, food, medicine, agriculture, environmental protection and people's daily life. They are important tools for developing industrial and agricultural production, saving energy, improving product quality, and enhancing economic efficiency and management level.

[0003] In the calibration and verification of gas flow meters during production and subsequent use, the airtightness of the pipeline has a significant impact on the verification of gas flow meters. Therefore, the airtightness of the gas flow meter must be considered when calibrating it. Existing verification methods usually involve periodically charging the gas flow meter pipeline with gas and judging the leakage status of the gas flow meter based on the pressure difference between the input and output gas pressures. In practice, this leak detection method has high requirements for controlling various numerical variables of the gas flow meter and has a large measurement error. When the leakage of the gas flow meter is small, misjudgment is likely to occur. The leak detection work is difficult and has poor applicability. Summary of the Invention

[0004] To address the aforementioned technical problems in the existing technology, an automatic leak detection device for a gas flow meter is provided.

[0005] The objectives and effects of this invention are achieved by the following specific technical means:

[0006] An automatic leak detection device for a gas flow meter includes a main unit box and a delivery box. The delivery box is fixed to the left side of the main unit box. A main shaft tube is provided in the main unit box. A telescopic shaft seat and an air pump are respectively inserted into the left and right sides of the main shaft tube. A telescopic shaft tube is provided through the main shaft tube and the telescopic shaft seat. A pair of ring tube heads are symmetrically arranged on the telescopic shaft tube for adapting to the flow meter port.

[0007] The telescopic shaft tube is equipped with a leak detection component, which includes a receiver head, a transmitter head, and a leak detection tube. Each receiver head, transmitter head, and leak detection tube is provided in pairs. Each pair of receiver heads and transmitter heads are axially symmetrically distributed at the upper and lower ends of the inner wall of the telescopic shaft tube, and the leak detection tube is connected to the outside of the receiver head.

[0008] A further preferred embodiment: a valve port pipe is provided between the main shaft pipe and the air pump, and a flow meter is inserted into the upper end of the valve port pipe.

[0009] A further preferred embodiment: the telescopic shaft tube is slidably connected to the main shaft tube, and the telescopic shaft tube and the main shaft tube are interconnected.

[0010] A further preferred embodiment: a rail plate is fixedly provided between the telescopic shaft seat and the telescopic shaft tube, and the telescopic shaft tube passes through the rail plate; a window plate is provided between the telescopic shaft seat and the side wall of the main unit box.

[0011] A further preferred embodiment: the telescopic shaft tube is divided into a partition groove, and a leakage outlet is provided through the partition groove and the wall of the telescopic shaft tube.

[0012] A further preferred embodiment: an expansion ring is provided on the outer side of the annular tube head, and telescopic tubes are inserted at both the upper and lower ends of the expansion ring and the annular tube head, and an air plug is provided through the annular tube head and the telescopic tubes.

[0013] A further preferred embodiment: The conveyor box is provided with a rail base and a conveyor motor. The conveyor motor is located at the rear end of the rail base, and one end of the conveyor motor is connected to a conveyor roller. A placement platform is slidably connected to the rail base, and a conveyor belt is sleeved between the placement platform and the conveyor roller.

[0014] A further preferred embodiment: the main unit box has a main unit screen embedded on the front, and the main unit box also includes a leak detection system.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This automatic leak detection device for gas flow meters uses a conveyor platform and an air pump to deliver the flow meter. During the process, the air pump drives a telescopic shaft tube to connect with the gas flow meter pipeline. Gas in the telescopic shaft tube fills the partition groove and the inner cavity of the gas flow meter pipeline. The gas flow state is measured by the change of the light beams of the receiving head and the transmitting head in the partition groove, thus automatically detecting leaks in the gas flow meter. Compared with the traditional method of measuring flow meters by filling them with gas, this device improves the accuracy of leak detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the conveyor box of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the main unit box of the present invention;

[0020] Figure 4 This is a schematic diagram of the ring head structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the internal structure of the telescopic shaft tube of the present invention;

[0022] Figure 6 This is a schematic diagram of the telescopic shaft tube telescopic movement of the present invention.

[0023] The markings in the diagram are: 1-Main unit box; 2-Conveyor box; 3-Main unit screen; 4-Rail base; 5-Placement platform; 6-Conveyor motor; 7-Window panel; 8-Conveyor belt; 9-Conveyor roller; 10-Main shaft tube; 11-Air pump; 12-Telescopic shaft base; 13-Telescopic shaft tube; 14-Valve port tube; 15-Flow meter; 16-Ring tube head; 17-Rail plate; 18-Telescopic tube; 19-Expansion ring; 20-Air plug; 21-Leak outlet; 22-Receiver head; 23-Leak detection tube; 24-Transmitter head; 25-Separation groove. Detailed Implementation

[0024] Please see Figure 1-6 The embodiments of the present invention will be further described below;

[0025] An automatic leak detection device for a gas flow meter includes a main unit box 1 and a delivery box 2. The delivery box 2 is fixed to the left side of the main unit box 1. A main shaft tube 10 is provided in the main unit box 1. A telescopic shaft seat 12 and an air pump 11 are respectively inserted into the left and right sides of the main shaft tube 10. A telescopic shaft tube 13 is provided through the main shaft tube 10 and the telescopic shaft seat 12. A pair of annular tube heads 16 are symmetrically arranged on the telescopic shaft tube 13 for adapting to the flow meter port.

[0026] A leak detection assembly is provided in the telescopic shaft tube 13. The leak detection assembly includes a receiver head 22, a transmitter head 24 and a leak detection tube 23. Each receiver head 22, transmitter head 24 and leak detection tube 23 are provided in pairs. Each pair of receiver heads 22 and transmitter heads 24 are axially symmetrically distributed at the upper and lower ends of the inner wall of the telescopic shaft tube 13, and the leak detection tube 23 is connected to the outside of the receiver head 22.

[0027] The main unit box 1 has a main unit screen 3 embedded on the front and also includes a leak detection system.

[0028] Among them, such as Figure 2 As shown, the conveyor box 2 is equipped with a rail base 4 and a conveyor motor 6. The conveyor motor 6 is located at the rear end of the rail base 4, and one end of the conveyor motor 6 is connected to a transmission roller 9. A placement platform 5 is slidably connected on the rail base 4, and a conveyor belt 8 is sleeved between the placement platform 5 and the transmission roller 9. In this device, the placement platform 5 serves as the fixed placement end of the gas flow meter. During leak testing, after the conveyor motor 6 is braked, the placement platform 5 will move in a track-like translation on the rail base 4 through the driven transmission roller 9 and the circumferential traction of the conveyor belt 8, so as to transport the gas flow meter through the conveyor box 2.

[0029] Furthermore, a valve port pipe 14 is provided between the main shaft pipe 10 and the air pump 11, and a flow meter 15 is inserted into the upper end of the valve port pipe 14, such as... Figure 3As shown, when the air pump 11 feeds, it fills the spindle tube 10 with gas through the valve port pipe 14, and the flow meter 15 measures the amount of gas entering the spindle tube 10 along the valve port pipe 14 to provide initial data.

[0030] Furthermore, the telescopic shaft tube 13 is slidably connected to the main shaft tube 10, and the telescopic shaft tube 13 and the main shaft tube 10 are interconnected. A window plate 7 is provided through the telescopic shaft seat 12 and the side wall of the main unit box 1, such as... Figure 3 , 6 As shown, based on the above, the main shaft tube 10, after being filled with gas, will continue to expand and push the telescopic shaft tube 13 along the axial direction during the expansion process, so that the telescopic shaft tube 13 is inserted into the gas flow meter pipeline along the window plate 7, so that the gas flow meter is measured by automatically feeding the movable telescopic shaft tube 13.

[0031] Specifically, a rail plate 17 is fixedly provided between the telescopic shaft seat 12 and the telescopic shaft tube 13, and the telescopic shaft tube 13 passes through the rail plate 17. The rail plate 17 serves as a directional structure for the axial movement of the telescopic shaft tube 13, ensuring the stability of the axial movement displacement while supporting the movable structure of the telescopic shaft tube 13.

[0032] Furthermore, an expansion ring 19 is provided on the outside of the ring head 16. Telescopic tubes 18 are inserted at both the upper and lower ends of the expansion ring 19 and the ring head 16. An air plug 20 is provided between the ring head 16 and the telescopic tube 18. When the telescopic tube 13 is in a full state, the gas expansion will act through the air plug 20 on the telescopic tube 18 and the expansion ring 19. The telescopic tube 13 inserted into the gas flow meter pipeline will be tightly fitted to the inner wall of the pipeline by the expansion of the ring head 16 at both ends of the telescopic tube 13, so as to ensure the airtightness of the connection between the tube cavity of the telescopic tube 13 and the gas flow meter pipeline, and ensure the reliability of subsequent leak detection work.

[0033] The telescopic shaft tube 13 is divided into a partition groove 25, and a leak 21 is provided between the partition groove 25 and the wall of the telescopic shaft tube 13. The receiver head 22 and the transmitter head 24 are paired infrared beam tubes. Based on infrared imaging, an axial light spot is formed in the partition groove 25. The gas in the telescopic shaft tube 13 in the full state will flow into the gas flow meter pipeline through the surface leak 21, along the partition groove 25 and the leak 21. After a period of time, it remains static. If there is a leak in the gas flow meter pipeline, the gas will leak to the outside through the leak 21 and the gas flow meter pipeline. The flowing gas will affect the thermal distribution image of the light spot imaging. The leak detection tube 23 includes a photoelectric sensor to transmit the measurement signal to the leak detection system and display the feedback through the host screen 3, thereby reflecting the direction of gas leakage.

[0034] This leak detection device automatically detects leaks inside the gas flow meter pipeline using imaging measurement, avoiding the problem of accumulated airtightness errors in the connecting pipeline that affects the reliability of actual leak detection in traditional air-filling leak detection methods. Compared with traditional leak detection methods, this device improves the leak detection accuracy.

Claims

1. An automatic leak detection device for a gas flow meter, comprising a main unit box (1) and a conveying box (2), wherein the conveying box (2) is fixed to the left side of the main unit box (1), characterized in that: The main unit box (1) is provided with a main shaft tube (10). A telescopic shaft seat (12) and an air pump (11) are respectively inserted into the left and right sides of the main shaft tube (10). A telescopic shaft tube (13) is provided through the main shaft tube (10) and the telescopic shaft seat (12). A pair of ring tube heads (16) are symmetrically arranged on the telescopic shaft tube (13) for matching the flow meter port. A valve port tube (14) is provided through the main shaft tube (10) and the air pump (11). A flow meter (15) is inserted into the upper end of the valve port tube (14). The telescopic shaft tube (13) is provided with a leak detection component, which includes a pair of receivers (22), a transmitter (24) and a leak detection tube (23). Each pair of receivers (22) and transmitters (24) are axially symmetrically distributed at the upper and lower ends of the inner wall of the telescopic shaft tube (13), and the leak detection tube (23) is connected to the outside of the receivers (22). The telescopic shaft tube (13) is slidably connected to the main shaft tube (10), and the telescopic shaft tube (13) and the main shaft tube (10) are interconnected. A partition groove (25) is formed in the telescopic shaft tube (13), and a leak (21) is provided through the partition groove (25) and the wall of the telescopic shaft tube (13). The receiver head (22) and the transmitter head (24) are paired matching infrared beam tubes, and an axial light spot is formed in the partition groove (25) based on infrared imaging. An expansion ring (19) is provided on the outside of the ring head (16). A telescopic tube (18) is inserted at both the upper and lower ends of the expansion ring (19) and the ring head (16). An air plug (20) is provided between the ring head (16) and the telescopic tube (18).

2. The automatic leak detection device for a gas flow meter according to claim 1, characterized in that: A rail plate (17) is fixedly provided between the telescopic shaft seat (12) and the telescopic shaft tube (13), and the telescopic shaft tube (13) passes through the rail plate (17). A window plate (7) is provided between the telescopic shaft seat (12) and the side wall of the main unit box (1).

3. The automatic leak detection device for a gas flow meter according to claim 1, characterized in that: The conveyor box (2) is provided with a rail seat (4) and a conveyor motor (6). The conveyor motor (6) is located at the rear end of the rail seat (4), and one end of the conveyor motor (6) is connected to a conveyor roller (9). A placement platform (5) is slidably connected on the rail seat (4), and a conveyor belt (8) is sleeved between the placement platform (5) and the conveyor roller (9).

4. The automatic leak detection device for a gas flow meter according to claim 1, characterized in that: The main unit box (1) is equipped with a main unit screen (3) on the front, and the main unit box (1) also includes a leak detection system.

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