Integrated pressure tester

Abstract

The utility model discloses an integrated pressure test instrument which comprises a pressure test instrument body, a connecting pipe is arranged on one side of the pressure test instrument body, a containing cavity is formed in the connecting pipe, a pressure sensor and an atmospheric pressure sensor are arranged in the containing cavity, a penetrating-out hole is formed in the side wall of the connecting pipe, and a sensing probe of the atmospheric pressure sensor extends out of the penetrating-out hole. The pressure test instrument body is further connected with a temperature sensor which can be placed beside a gas pipeline, a control circuit board which can receive signals of the pressure sensor, the temperature sensor and the atmospheric pressure sensor so as to calculate corrected pressure drop is arranged in the pressure test instrument body, and an output unit which can output the corrected pressure drop is arranged on the pressure test instrument body. The pressure drop compensation device can output the corrected pressure drop after compensation calculation so as to judge whether the leakproofness in the pipe is qualified or not, and the calculation result is subjected to atmospheric pressure compensation and temperature compensation so as to reduce the influence of external environmental factors on the test result, reduce the measurement error and improve the accuracy of the result.

Description

Technical Field

[0001] This utility model relates to the technical field of gas pipeline pressure testing equipment, and in particular to an integrated pressure testing instrument. Background Technology

[0002] Pressure testing is a crucial step in the installation and maintenance of gas pipelines to ensure the integrity and safety of the pipeline system. Traditional pressure testing equipment typically requires separate pressure gauges and thermometers to monitor the pressure and temperature inside the pipeline. This method is not only complex to operate, but also may lead to inaccurate measurement results due to the lack of effective pressure and temperature compensation mechanisms.

[0003] While some integrated pressure and temperature transmitters are available on the market, they still have limitations in practical use. For example, these devices often do not consider the impact of external environmental factors, such as atmospheric pressure variations, on the measurement results, which may lead to deviations in measurement data obtained at different altitudes or under different weather conditions. Furthermore, most existing pressure testing instruments cannot directly provide temperature-compensated pressure values ​​and pressure-compensated temperature values, making it difficult for users to quickly and accurately assess the actual condition of pipelines.

[0004] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0005] This invention overcomes the shortcomings of the prior art and provides an integrated pressure testing instrument that can accurately test the airtightness of pipelines.

[0006] This utility model is achieved through the following technical solution:

[0007] An integrated pressure testing instrument includes a main body, a connecting pipe on one side of the main body that can be connected to a gas pipeline, a receiving cavity inside the connecting pipe, a pressure sensor and an atmospheric pressure sensor inside the receiving cavity, an outlet hole on the side wall of the connecting pipe, and a sensing probe of the atmospheric pressure sensor extending out of the outlet hole. A temperature sensor that can be placed next to the gas pipeline is also connected to the main body of the pressure testing instrument via wires. The main body of the pressure testing instrument includes a control circuit board that receives signals from the pressure sensor, temperature sensor, and atmospheric pressure sensor to calculate and correct the pressure drop. The main body of the pressure testing instrument also includes an output unit that outputs the corrected pressure drop.

[0008] As described above, in an integrated pressure testing instrument, the pressure sensor has a first protrusion structure on its outer surface to increase its sensing surface.

[0009] As described above, in an integrated pressure testing instrument, the first protrusion structure includes a threaded protrusion or an annular protrusion.

[0010] As described above, in an integrated pressure testing instrument, the temperature sensor has a second protruding structure on its outer surface to increase its sensing surface.

[0011] In the integrated pressure testing instrument described above, the second protrusion structure includes a threaded protrusion or an annular protrusion.

[0012] In the integrated pressure testing instrument described above, the pressure sensor, temperature sensor, and atmospheric pressure sensor are each connected to the control circuit board via independent wires.

[0013] In the integrated pressure testing instrument described above, a sealing ring is provided between the sensing probe of the atmospheric pressure sensor and the wall of the through hole to seal the gap between them.

[0014] As described above, an integrated pressure tester has a connector on the lower side of the main body of the pressure tester, the upper end of the connecting pipe is threaded to the connector, and the lower end of the connecting pipe has a threaded structure that can be threaded to a gas pipeline.

[0015] As described above, in an integrated pressure testing instrument, a connecting column is connected to the main body of the pressure testing instrument, and the pressure sensor and atmospheric pressure sensor are directly or indirectly connected to the connecting column, with the connecting tube sleeved on the outside of the connecting column.

[0016] As described above, in an integrated pressure testing device, the output unit includes a display screen and a wireless signal transmission antenna, both of which are electrically connected to a control circuit board.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This solution can output the corrected pressure drop after compensation calculation, thereby determining whether the tightness of the pipe is qualified. The calculation result is compensated by atmospheric pressure and temperature to reduce the influence of external environmental factors on the test results, reduce measurement errors, and improve the accuracy of the results.

[0019] 2. Temperature sensors can be concealed next to the gas pipeline being tested to simulate the temperature inside the pipe for inspection.

[0020] 3. The pressure sensor has a first protrusion structure on its outer surface to increase its sensing surface, and the temperature sensor has a second protrusion structure on its outer surface to increase its sensing surface, thereby increasing the effective contact area between the sensor and the medium, which helps to improve the sensor's response speed and measurement accuracy.

[0021] 4. The pressure sensor, temperature sensor, and atmospheric pressure sensor are each connected to the control circuit board via independent wires. Independent wiring can reduce mutual interference between signals from different sensors. Separate lines reduce the possibility of signal attenuation and crosstalk, which helps to improve the accuracy and reliability of data from each sensor. Attached Figure Description

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] like Figures 1 to 3 An integrated pressure testing instrument is shown, comprising a main body 1. A connecting pipe 2, which can be connected to a gas pipeline, is provided on one side of the main body 1. A receiving cavity 21 is provided inside the connecting pipe 21, housing a pressure sensor 3 and an atmospheric pressure sensor 5. A through-hole 22 is provided on the side wall of the connecting pipe 2, through which the sensing probe of the atmospheric pressure sensor 5 extends. A temperature sensor 4, which can be placed next to the gas pipeline, is also connected to the main body 1 via a wire 7. A control circuit board 6 is provided inside the main body 1 to receive signals from the pressure sensor 3, temperature sensor 4, and atmospheric pressure sensor 5, thereby calculating a corrected pressure drop. An output unit is provided on the main body 1 to output the corrected pressure drop. The duration of the tightness test pressure stabilization is set to H via the control circuit board 6, where H is greater than or equal to 24 hours, and measurements are recorded at least once per hour; H equal to 24 hours is the preferred option.

[0028] The formula for calculating the corrected pressure drop in the control circuit board 6 mentioned above can be:

[0029] ΔP′=(F1+P1)-(F2+P2)*(273+T1) / (273+T2), when the calculated ΔP′<133P a At that time, the test result of the tightness test and voltage stabilization was qualified.

[0030] Where ΔP′ is the corrected pressure drop, in units of P. a F1 is the pressure value measured by pressure sensor 3 at the start of the test, in units of P. aF2 is the pressure value measured by pressure sensor 3 at the end of the test, in units of P. a P1 is the atmospheric pressure value measured by atmospheric pressure sensor 5 at the start of the experiment, in units of P. a P2 is the atmospheric pressure value measured by atmospheric pressure sensor 5 at the end of the experiment, in units of P. a T1 is the temperature value measured by temperature sensor 4 at the beginning of the test, in °C; T2 is the temperature value measured by temperature sensor 4 at the end of the test, in °C.

[0031] This system can output a corrected pressure drop after compensation calculation, thereby determining whether the pipe's tightness is up to standard. The calculation results are compensated for by atmospheric pressure and temperature, reducing the influence of external environmental factors on the test results, minimizing measurement errors, and improving the accuracy of the results. Temperature sensor 4 can be concealed near the gas pipeline being tested to simulate the temperature inside the pipe for inspection.

[0032] Specifically, a connector 11 is provided on the lower side of the pressure testing instrument body 1, and the upper end of the connecting pipe 2 is threadedly connected to the connector 11. The lower end of the connecting pipe 2 is provided with a threaded structure 23 that can be threadedly connected to a gas pipeline. Of course, the connecting pipe 2 can also be connected to the pressure testing instrument body 1 by other connection structures such as clips or flanges.

[0033] In one embodiment, a connecting post 12 is connected to the main body 1 of the pressure testing instrument. The pressure sensor 3 and the atmospheric pressure sensor 5 are both directly or indirectly connected to the connecting post 12, and the connecting tube 2 is sleeved on the outside of the connecting post 12. The lower end of the connector 11 is provided with a mounting groove 110. The connecting post 12 can be connected to the inner top of the mounting groove 110 by glue or other connecting structures such as clips. The pressure sensor 3 can be connected to the bottom of the connecting post 12 by glue or other connecting structures such as clips. The atmospheric pressure sensor 5 can be connected to the connecting post 12 by a threaded structure or other connecting structures.

[0034] In one embodiment, a leak test hole 111 for detecting the airtightness of the connection between the connector 11 and the connecting pipe 2 is provided. In another embodiment, the leak test hole 111 is located on the connector 11 and communicates with the inner top of the mounting groove 110. When the connecting post 12 is connected to the inner top of the mounting groove 110, the connecting post 12 can block the leak test hole 111 and restrict the gas from escaping from the leak test hole 111.

[0035] In some embodiments, a sealing ring 8 is provided between the sensing probe of the atmospheric pressure sensor 5 and the wall of the through hole 22 to seal the gap between them. The sealing ring 8 restricts gas from escaping from the through hole 22, preventing leakage from affecting the measurement structure. Alternatively, the sensing probe of the atmospheric pressure sensor 5 can be sealed to prevent leakage by interference fit with the through hole 22.

[0036] In some embodiments, the pressure sensor 3 has a first protrusion structure 31 on its outer surface to increase its sensing surface. The first protrusion structure 31 can be a threaded protrusion, an annular protrusion, or other shapes. Increasing the effective contact area between the pressure sensor 3 and the gas through the first protrusion structure 31 helps improve the sensor's response speed and measurement accuracy.

[0037] In some embodiments, the temperature sensor 4 has a second protrusion structure 41 on its outer surface to increase its sensing surface. The second protrusion structure 41 can be a threaded protrusion, an annular protrusion, or other shapes. Increasing the effective contact area between the temperature sensor 4 and the gas through the second protrusion structure 41 helps improve the response speed and measurement accuracy of the temperature sensor 4.

[0038] In some embodiments, the temperature sensor 4 may be a threaded temperature sensor, a probe-type temperature sensor, or other types of temperature sensors.

[0039] In some embodiments, the pressure sensor 3, temperature sensor 4, and atmospheric pressure sensor 5 are each connected to the control circuit board 6 via independent wires 7. Independent wiring can reduce mutual interference between signals from different sensors, and separate lines reduce the possibility of signal attenuation and crosstalk, which helps to improve the accuracy and reliability of the data from each sensor.

[0040] In some embodiments, the output unit includes a display screen 91 and a wireless signal transmission antenna 92, both of which are electrically connected to the control circuit board 6. Test data can be transmitted via the wireless signal transmission antenna 92, reducing manual data transmission and avoiding adverse effects caused by human error.

[0041] In some embodiments, the pressure tester body 1 is also provided with a power supply 20 or a power plug for supplying power to the various components.

Claims

1. An integrated pressure test device, comprising a pressure test device main body (1), one side of the pressure test device main body (1) is provided with a connecting pipe (2) capable of being connected with a gas pipeline in a conductive manner, characterized in that: The connecting pipe (2) is internally provided with a containing cavity (21), the containing cavity (21) is internally provided with a pressure sensor (3) and an atmospheric pressure sensor (5), the connecting pipe (2) side wall is provided with a through hole (22), the sensing probe of the atmospheric pressure sensor (5) extends from the through hole (22), the pressure tester main body (1) is further connected with a temperature sensor (4) capable of being placed beside the gas pipeline through an electric wire (7), the pressure tester main body (1) is internally provided with a control circuit board (6) capable of receiving the signals of the pressure sensor (3), the temperature sensor (4) and the atmospheric pressure sensor (5) to calculate the corrected pressure drop, the pressure tester main body (1) is provided with an output unit capable of outputting the corrected pressure drop.

2. The integrated pressure tester of claim 1, wherein: The outer surface of the pressure sensor (3) is provided with a first protruding structure (31) for increasing the sensing surface thereof.

3. The integrated pressure tester of claim 2, wherein: The first protruding structure (31) comprises a threaded protrusion or an annular protrusion.

4. The integrated pressure tester of claim 1, wherein: The outer surface of the temperature sensor (4) is provided with a second protruding structure (41) for increasing the sensing surface thereof.

5. The integrated pressure tester of claim 4, wherein: The second protruding structure (41) comprises a threaded protrusion or an annular protrusion.

6. The integrated pressure tester of any one of claims 1-4, wherein: The pressure sensor (3), the temperature sensor (4) and the atmospheric pressure sensor (5) are respectively connected to the control circuit board (6) through independent electric wires (7).

7. The integrated pressure tester of claim 1, wherein: The sensing probe of the atmospheric pressure sensor (5) and the hole wall of the through hole (22) are provided with a sealing ring (8) for sealing the gap therebetween.

8. The integrated pressure tester of claim 1, wherein: The lower side of the pressure tester main body (1) is provided with a connecting head (11), the upper end of the connecting pipe (2) is threadedly connected with the connecting head (11), and the lower end of the connecting pipe (2) is provided with a threaded structure (23) capable of being threadedly connected with the gas pipeline.

9. The integrated pressure tester of claim 8, wherein: The pressure tester main body (1) is connected with a connecting column (12), the pressure sensor (3) and the atmospheric pressure sensor (5) are directly or indirectly connected to the connecting column (12), and the connecting pipe (2) is sleeved on the outer side of the connecting column (12).

10. The integrated pressure tester of claim 1, wherein: The output unit comprises a display screen (91) and a wireless signal transmission antenna (92), and the display screen (91) and the wireless signal transmission antenna (92) are electrically connected with the control circuit board (6).

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