Air tightness testing device for pressure pipeline

Abstract

The utility model provides a pressure pipeline air tightness testing device which comprises an air supply unit, a first electromagnetic valve is installed on an external air supply pipeline of the air supply unit, the first electromagnetic valve is connected with the head end of a pressure pipeline in a building after passing through a first teletransmission pressure gauge, and a second teletransmission pressure gauge is installed at the tail end of the pressure pipeline. The second teletransmission pressure gauge is connected with the second electromagnetic valve, and the first electromagnetic valve, the first teletransmission pressure gauge, the second teletransmission pressure gauge and the second electromagnetic valve are respectively connected with the control platform. The electromagnetic valve is adopted to replace manual work to release and close gas supplied by the gas supply unit, and the precision is high; in the pressure testing process, the first teletransmission pressure gauge and the second teletransmission pressure gauge transmit real-time pressure data to the control platform and display the real-time pressure data on the control panel, the whole testing process is carried out in a remote control mode, workers do not need to enter a high-pressure area for operation, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline testing, in particular to a device for testing the air tightness of a pressure pipeline. Background Art

[0002] In some factories and special buildings, various gases often need to be transported through pressure pipelines. Therefore, the air tightness of these pressure pipelines is very important. In order to test whether there is air leakage in the pipeline, the common method for pressure testing of the pipe network at present is as follows: 1. Install a nitrogen cylinder, a valve and a pressure gauge at the head end of the pipe network, and install a pressure gauge at the end of the pipe network; 2. Loosen the valve of the nitrogen cylinder, and the pipeline starts to be filled with nitrogen; 3. When the air pressures of the two pressure gauges at the head and end of the pipeline both reach 5 Mpa, close the valve of the nitrogen cylinder, and take pictures and save the air pressure values of the two pressure gauges at the head and end; 4. After maintaining for 3 - 5 minutes, observe whether the pressure values in the pressure gauges at the head and end change: if the pressure value changes, it indicates that there is air leakage, and immediately conduct pipeline inspection; if the pressure value of the pressure gauge remains unchanged, it indicates that the gas in the pipeline has no leakage, take pictures and save the two pressure gauges at the head and end, and proceed to the next step; 5. If there is no gas leakage in the previous pressure condition, loosen the valve of the nitrogen cylinder again to perform a small additional pressure again. The additional pressure amplitude is based on the design requirements. Repeat steps 3 and 4 until the pressure value of the pressure gauge reaches the design requirements. After the pressure test passes, the test process ends.

[0003] When implementing this process, the following problems exist: 1. Each additional pressure needs to be manually controlled, with slow speed, low accuracy, large error accumulation, and complex control; 2. Each time, pictures need to be taken and saved, watermarks need to be added, and then exported from the mobile phone, and it cannot be automatically recorded; 3. Manual confirmation is required at both the head and end simultaneously to proceed to the next step. The head and end of the pipeline are often far apart, and poor communication is likely to lead to safety accidents; 4. Personnel need to record the pressure value near the high-pressure area, which poses a safety risk. Therefore, it is necessary to develop a device for testing the air tightness of a pressure pipeline, which can remotely perform air tightness tests on a pressure pipeline with multiple pressure values and save the data in the pressure gauge to avoid the danger of manual operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for testing the air tightness of a pressure pipeline, which connects a first solenoid valve, a first remote pressure gauge, a second remote pressure gauge, and a second solenoid valve to a control platform respectively. The entire test process is carried out in a remote control manner, and the staff does not need to enter the high-pressure area for operation, with high safety. To achieve the above technical features, the purpose of the utility model is realized as follows:

[0005] A pressure pipeline airtightness test device includes a gas supply unit. A first solenoid valve is installed on the external gas supply pipeline of the gas supply unit. After passing through a first remote pressure gauge, the first solenoid valve is connected to the head end of the pressure pipeline in the building. A second remote pressure gauge is installed at the end of the pressure pipeline, and the second remote pressure gauge is connected to a second solenoid valve. The first solenoid valve, the first remote pressure gauge, the second remote pressure gauge, and the second solenoid valve are respectively connected to a control platform.

[0006] The second solenoid valve is connected to a gas collection system.

[0007] The gas collection system includes an air compressor connected to the second solenoid valve and a gas collection tank connected to the air compressor.

[0008] The first solenoid valve and the second solenoid valve are respectively connected to the control platform through a wireless data transmission module.

[0009] The gas supply unit is a nitrogen tank.

[0010] A method for using a pressure pipeline airtightness test device includes the following steps:

[0011] S1: First, complete the installation of the device of the present application, and set the first solenoid valve and the second solenoid valve to the closed state;

[0012] S2: Start the gas supply unit, and send an opening instruction to the first solenoid valve through the control platform. The gas in the gas supply unit starts to enter the pressure pipeline. The control platform receives the air pressure values of the first remote pressure gauge and the second remote pressure gauge and displays them on the control panel display screen of the control platform. When the air pressure values of the first remote pressure gauge and the second remote pressure gauge both reach the initial preset value, send a closing instruction to the first solenoid valve through the control platform, and then close the first solenoid valve;

[0013] S3: The timing module of the control platform starts timing. After t minutes, observe whether the pressure values of the first remote pressure gauge and the second remote pressure gauge change through the control panel of the control platform: If the pressure values change, it indicates a leakage phenomenon, immediately stop the test, and conduct pipeline inspection; If the pressure values remain unchanged, it indicates that the gas in the pressure pipeline does not leak, and store the pressure values in the first remote pressure gauge and the second remote pressure gauge into the database of the control platform;

[0014] S4: If there is no leakage in the previous pressure condition, send an opening instruction to the first solenoid valve through the control platform again to start the gas in the gas supply unit to enter the pressure pipeline to achieve re-pressurization. The pressurization amplitude is determined according to the design. Repeat the steps of S3 and S4 until the pressure values of the first remote pressure gauge and the second remote pressure gauge both reach the specified requirements;

[0015] S5: After the specified pressure test passes, send an opening instruction to the second solenoid valve through the control platform. The gas in the pressure pipeline flows into the air compressor after passing through the second solenoid valve, and then the air compressor compresses the gas into the gas collection tank, and the test process ends.

[0016] In the present utility model, the first solenoid valve, the first remote pressure gauge, the second remote pressure gauge, and the second solenoid valve are respectively connected to the control platform. The solenoid valve is used to replace manual release and closing of the gas supplied by the gas supply unit, with high accuracy; during the pressure test, the first remote pressure gauge and the second remote pressure gauge transmit real-time pressure data to the control platform and display it on the control panel. Therefore, through the control platform, the pressure changes at both ends of the pressure pipeline can be monitored in real time, and the next operation can be determined according to the pressure change value. At the same time, the pressure test data is automatically recorded and a pressure test statistical report is formed and stored in the database of the control platform, with a high degree of informatization; the entire test process is carried out in a remote control manner, and the staff does not need to enter the high-pressure area for operation, with high safety. Description of the Drawings

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the connection structure when the pressure pipeline airtightness test device provided by the embodiment of the present utility model is working;

[0019] Figure 2 It is a schematic diagram of the multi-channel pipeline provided by the embodiment of the present utility model;

[0020] Figure 3 It is a logic diagram of a pressure pipeline airtightness test device provided by the embodiment of the present utility model;

[0021] In the figure: gas supply unit 1, first solenoid valve 2, multi-channel pipeline 3, access port 301, output port 302, first remote pressure gauge 4, pressure pipeline 5, second remote pressure gauge 6, second solenoid valve 7, air compressor 8, plug 9, gas collection tank 10. Detailed Embodiments

[0022] The embodiments of the present utility model will be further described below in conjunction with the drawings.

[0023] Embodiment 1: Refer to the appendix Figures 1-3, A pressure pipeline airtightness test device, including a gas supply unit 1. A first solenoid valve 2 is installed on the external gas supply pipeline of the gas supply unit 1. After passing through a first remote pressure gauge 4, the first solenoid valve 2 is connected to the head end of a pressure pipeline 5 in a building. A second remote pressure gauge 6 is installed at the end of the pressure pipeline 5. The second remote pressure gauge 6 is connected to a second solenoid valve 7. The first solenoid valve 2, the first remote pressure gauge 4, the second remote pressure gauge 6, and the second solenoid valve 7 are respectively connected to a control platform.

[0024] In the present utility model, the first solenoid valve 2, the first remote pressure gauge 4, the second remote pressure gauge 6, and the second solenoid valve 7 are respectively connected to the control platform. The solenoid valve is used to replace manual operation to release and close the gas supplied by the gas supply unit 1, with high precision. During the pressure test, the first remote pressure gauge 4 and the second remote pressure gauge 6 transmit real-time pressure data to the control platform and display it on the control panel. Therefore, through the control platform, the pressure changes at both ends of the pressure pipeline can be monitored in real time, and the next operation can be determined according to the pressure change value. At the same time, the pressure test data is automatically recorded and a pressure test statistical report is formed and stored in the database of the control platform, with a high degree of informatization. The entire test process is carried out in a remote control manner, and the staff does not need to enter the high-pressure area for operation, with high safety.

[0025] Furthermore, the second solenoid valve 7 is connected to a gas collection system to avoid waste of compressed gas.

[0026] Furthermore, the gas collection system includes an air compressor 8 connected to the second solenoid valve 7 and a gas collection tank 10 connected to the air compressor 8.

[0027] Furthermore, the first solenoid valve 2 and the second solenoid valve 7 are respectively connected to the control platform through a wireless data transmission module, thus simplifying the installation of the solenoid valve.

[0028] Furthermore, the gas supply unit 1 is a nitrogen tank.

[0029] Furthermore, the first solenoid valve 2 is connected to the first remote pressure gauge 4 through a multi-channel pipeline 3. The multi-channel pipeline 3 has multiple inlets 301 and one outlet 302. The inlets 301 can be connected to the gas supply unit 1 through the first solenoid valve 2. The control platform can control multiple first solenoid valves 2, thereby avoiding manual replacement of the gas supply unit 1 by the operator. The operator can seal the unused inlets through a plug 9.

[0030] Embodiment 2: A method for using a pressure pipeline airtightness test device, including the following steps:

[0031] S1: First, complete the installation of the device of this application, and set the first solenoid valve 2 and the second solenoid valve 7 to the closed state;

[0032] S2: Start the gas supply unit 1, and send an opening instruction to the first solenoid valve 2 through the control platform. The gas in the gas supply unit 1 starts to enter the pressure pipeline 5. The control platform receives the air pressure values of the first remote pressure gauge 4 and the second remote pressure gauge 6 and displays them on the control panel display screen of the control platform. When the air pressure values of the first remote pressure gauge 4 and the second remote pressure gauge 6 both reach the initial preset value, send a closing instruction to the first solenoid valve 2 through the control platform, and then close the first solenoid valve 2;

[0033] S3: The timing module of the control platform starts timing. After 5 minutes, observe whether the pressure values of the first remote pressure gauge 4 and the second remote pressure gauge 6 change through the control panel of the control platform: If the pressure value changes, it indicates a gas leakage phenomenon, immediately stop the test, and conduct a pipeline inspection; If the pressure value remains unchanged, it indicates that the gas in the pressure pipeline 5 does not leak, and store the pressure values in the first remote pressure gauge 4 and the second remote pressure gauge 6 into the database of the control platform;

[0034] S4: If there is no leakage in the previous pressure condition, send an opening instruction to the first solenoid valve 2 again through the control platform to start the gas in the gas supply unit 1 to enter the pressure pipeline 5 to achieve re-pressurization. The pressurization amplitude is determined according to the design. Repeat the steps of S3 and S4 until the pressure values of the first remote pressure gauge 4 and the second remote pressure gauge 6 both reach the specified requirements;

[0035] S5: After passing the specified pressure test, send an opening instruction to the second solenoid valve 7 through the control platform. The gas in the pressure pipeline 5 flows into the air compressor 8 through the second solenoid valve 7, and then the air compressor 8 compresses the gas into the gas collection tank 10, and the test process ends.

Claims

1. A pressure pipeline airtightness test device, characterized in that: It includes a gas supply unit (1), a first solenoid valve (2) is installed on the external gas supply pipeline of the gas supply unit (1), after passing through a first remote pressure gauge (4), the first solenoid valve (2) is connected to the head end of a pressure pipeline (5) inside the building, a second remote pressure gauge (6) is installed at the end of the pressure pipeline (5), the second remote pressure gauge (6) is connected to a second solenoid valve (7), and the first solenoid valve (2), the first remote pressure gauge (4), the second remote pressure gauge (6), and the second solenoid valve (7) are respectively connected to a control platform.

2. The airtightness testing device for a pressure pipeline according to claim 1, wherein: The second solenoid valve (7) is connected to a gas collection system.

3. The airtightness testing device for a pressure pipeline according to claim 2, characterized in that: The gas collection system includes an air compressor (8) connected to the second solenoid valve (7) and a gas collection tank (10) connected to the air compressor (8).

4. The airtightness testing device for a pressure pipeline according to claim 3, wherein: The first solenoid valve (2) and the second solenoid valve (7) are respectively connected to the control platform through a wireless data transmission module.

5. The airtightness testing device for a pressure pipeline according to claim 4, wherein: The gas supply unit (1) is a nitrogen tank.

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