Instrument pipe air pressure testing device

Abstract

This utility model relates to the field of testing equipment technology, and provides an instrument tube pressure testing device, including an air pump, a gas distributor, and connecting pipes. The gas distributor includes a main pipe and two sets of branch pipes. The first end of the main pipe is connected to the air pump, and the second end of the main pipe is closed. The two sets of branch pipes are distributed on both sides of the main pipe, with the first end of each branch pipe connected to the side wall of the main pipe and communicating with the main pipe. The main pipe and the two sets of branch pipes are integrally formed. Each branch pipe corresponds to a connecting pipe, the first end of which is connected to the second end of the branch pipe via a shut-off valve, and the second end of the connecting pipe is connected to the instrument tube. The connecting pipe is equipped with an exhaust valve and a pressure gauge. This configuration can provide test mounting positions for at least two instrument tubes to be tested, avoids welding leaks between the main pipe and the branch pipes, reduces the need to test the sealing of the connection between the branch pipe and the main pipe, and improves testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to an instrument tube air pressure testing device. Background Technology

[0002] Instrument piping is used to connect various measuring instruments, control systems, and equipment. It is primarily used to transmit gases, liquids, or other media to monitor and control parameters such as pressure, flow rate, and temperature. Instrument piping mainly consists of valves, filters, pressure gauges, thermometers, and other accessories connected to the pipe body by welding. After installation or before commissioning, a pneumatic pressure test is usually required to ensure its sealing and pressure resistance meet design requirements and safety standards. The main purpose of the pneumatic pressure test is to detect any leaks in the piping system and verify its structural strength and the reliability of joints, flanges, and other connections.

[0003] In related technologies, some pneumatic testing devices for instrument tubes can only test one instrument tube at a time. When there are many instrument tubes to be tested, it is necessary to repeatedly disassemble and reassemble the instrument tubes on the pneumatic testing device and test them one by one, which is inefficient. Although in some cases, the pneumatic testing device is equipped with multiple branch pipes, these branch pipes are often connected to the main pipeline by welding. There is a possibility of leakage at the weld between the branch pipe and the main pipeline, and the welding quality requirements are extremely high. In order to ensure the accuracy of the test results and avoid misjudgment of the test results of the instrument tubes due to leakage points at the weld between the branch pipe and the main pipeline, the sealing of the weld between the branch pipe and the main pipeline needs to be repeatedly checked during the test. The experimental procedures are cumbersome, time-consuming, and inefficient.

[0004] Therefore, how to solve the problem of low testing efficiency in the air pressure testing device for instrument tubes in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] This invention provides an instrument tube air pressure testing device to solve the problem of low testing efficiency in related technologies for instrument tube air pressure testing devices.

[0006] This utility model provides an instrument tube air pressure testing device, comprising:

[0007] air pump;

[0008] A gas distributor includes a main pipeline and two sets of branch pipelines. The first end of the main pipeline is connected to the gas pump, and the second end of the main pipeline is closed. The two sets of branch pipelines are distributed on both sides of the main pipeline. The first end of each branch pipeline is connected to the side wall of the main pipeline and is connected to the main pipeline. The main pipeline and the two sets of branch pipelines are integrally formed.

[0009] Each branch pipe corresponds to one connecting pipe. The first end of the connecting pipe is connected to the second end of the branch pipe through a shut-off valve. The second end of the connecting pipe is adapted to connect to an instrument pipe. An exhaust valve and a pressure gauge are provided on the connecting pipe.

[0010] According to the present invention, the main pipeline and the branch pipeline are made of aluminum alloy, and the gas distributor is formed by at least one of 3D printing, investment casting, extrusion molding, hot rolling and cold drawing processes.

[0011] According to the present invention, an instrument pipe pressure testing device is provided, wherein the axis of the branch pipe is perpendicular to the axis of the branch pipe, each group of the branch pipe includes at least two branch pipes, and the two groups of branch pipes are staggered.

[0012] According to the present invention, an instrument pipe pressure testing device is provided, wherein the connecting pipe is a rigid pipe, the dial faces of each pressure gauge face the same side, and the normal of the dial face of each pressure gauge is parallel to the axis of the main pipe.

[0013] Along the axial direction of the main pipeline, the projected areas of the dials of each pressure gauge do not intersect.

[0014] According to the present invention, an instrument tube pressure testing device is provided, wherein each pressure gauge is connected to the connecting pipeline through a flexible metal tube, the flexible metal tube including one of a metal bellows, a spring tube and a gooseneck tube.

[0015] According to the present invention, an instrument tube air pressure testing device is provided, wherein the pressure gauge is a digital display pressure gauge.

[0016] According to the instrument tube air pressure testing device provided by this utility model, it further includes:

[0017] A timer, adapted for countdown timers, wherein the timer is adapted to issue a prompt message when the countdown ends.

[0018] According to the instrument tube air pressure testing device provided by this utility model, it further includes:

[0019] A high-pressure hose is provided at the second end of the connecting pipe, the first end of the high-pressure hose is connected to the second end of the connecting pipe, and the second end of the high-pressure hose is adapted to connect to the instrument pipe.

[0020] According to the present invention, an instrument tube air pressure testing device is provided, wherein the air pump is a portable air pump.

[0021] According to the present invention, an instrument pipe air pressure testing device further includes a pressure reducing valve and an overflow valve, wherein the pressure reducing valve and the overflow valve are connected in series between the first end of the main pipeline and the air pump.

[0022] This utility model provides an instrument tube pressure testing device, comprising an air pump, a gas distributor, and connecting pipes. The gas distributor includes a main pipe and two sets of branch pipes. The first end of the main pipe is connected to the air pump, and the second end is closed. The air pump can pressurize the branch pipes with gas. The two sets of branch pipes are distributed on both sides of the main pipe, with the first end connected to the side wall of the main pipe and in communication with it. The first end of the connecting pipe is connected to the second end of the branch pipe via a shut-off valve, and the second end of the connecting pipe is used to connect to the instrument tubes. Gas in the main pipe enters each branch pipe and then enters each instrument tube through the connecting pipes. An exhaust valve and a pressure gauge are installed on the connecting pipes. The pressure gauge allows real-time monitoring of the inflation pressure in the instrument tubes, controlling the start and stop of the air pump. When the inflation pressure in the instrument tube reaches a preset value, the air pump stops operating. The pressure gauge allows real-time monitoring of the pressure in the instrument tubes, thus enabling the determination of any leakage. Each branch pipe corresponds to one connecting pipe, giving the instrument tube pressure testing device of this invention at least two connecting pipes. This provides test mounting positions for at least two instrument tubes under test, allowing simultaneous testing of at least two instrument tubes and improving testing efficiency. The main pipe and two sets of branch pipes are integrally formed, avoiding welding between the main and branch pipes and eliminating potential weld leaks. This reduces the need to test the sealing of the connection points between the branch and main pipes, further improving testing efficiency. This design solves the problem of low testing efficiency in related instrument tube pressure testing devices. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the instrument tube air pressure testing device provided by this utility model.

[0025] Figure 2 This is a schematic diagram showing the relative positions of various pressure gauges located on the same side of the main pipeline when viewed along a direction parallel to the axis of the main pipeline, as provided by this utility model.

[0026] Figure label:

[0027] 1. Air pump; 2. Gas distributor; 3. Main pipeline; 4. Branch pipeline; 5. Connecting pipeline; 6. Shut-off valve; 7. Exhaust valve; 8. Pressure gauge; 9. Flexible metal tube; 10. Timer; 11. High-pressure hose; 12. Pressure reducing valve; 13. Overflow valve; 14. CPC quick connector. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] The following is combined Figures 1 to 2 This invention describes the instrument tube air pressure testing device.

[0030] like Figures 1 to 2 As shown, the instrument pipe air pressure testing device provided in this embodiment of the present invention includes an air pump 1, a gas distributor 2, and a connecting pipe 5.

[0031] Specifically, the gas distributor 2 includes a main pipe 3 and two sets of branch pipes 4. The first end of the main pipe 3 is connected to the air pump 1, and the second end of the main pipe 3 is closed. The air pump 1 can be used to fill the branch pipes 4 with gas at a certain pressure.

[0032] Two sets of branch pipes 4 are distributed on both sides of the main pipe 3. The first end of the branch pipe 4 is connected to the side wall of the main pipe 3, and the branch pipe 4 is connected to the main pipe 3. The first end of the connecting pipe 5 is connected to the second end of the branch pipe 4 through the shut-off valve 6. The second end of the connecting pipe 5 is used to connect to the instrument pipe.

[0033] Install the instrument tube to be tested at the second end of connecting pipe 5. Switch the shut-off valve 6 corresponding to the connecting pipe 5 without an instrument tube to the shut-off state, and switch the shut-off valve 6 corresponding to the connecting pipe 5 with an instrument tube to the open state. When air pump 1 is running, the gas in the main pipe 3 can enter the branch pipe 4 connected to the instrument tube, and then enter each instrument tube through connecting pipe 5. No gas will enter the connecting pipe 5 without an instrument tube.

[0034] An exhaust valve 7 and a pressure gauge 8 are installed on the connecting pipe 5. The pressure gauge 8 allows for real-time monitoring of the inflation pressure in the instrument pipe, which in turn controls the start and stop of the inflation pump 1. When the inflation pressure in the instrument pipe reaches a preset value, the corresponding inflation pump 1 stops operating. The pressure gauge 8 provides real-time monitoring of the pressure in the instrument pipe, thus allowing for the assessment of any leaks.

[0035] Each branch pipe 4 corresponds to a connecting pipe 5, so that the instrument pipe air pressure testing device provided in this utility model embodiment has at least two connecting pipes 5, which can provide test installation positions for at least two instrument pipes to be tested, and can test at least two instrument pipes at the same time, which is beneficial to improving testing efficiency.

[0036] The main pipe 3 and the two sets of branch pipes 4 are integrally formed, which can avoid welding between the main pipe 3 and the branch pipes 4, avoid welding leakage points between the main pipe 3 and the branch pipes 4, reduce the need to test the sealing of the connection between the branch pipes 4 and the main pipe 3, and improve testing efficiency.

[0037] This design solves the problem of low testing efficiency in pneumatic testing devices used for instrument tubes in related technologies.

[0038] In this embodiment of the utility model, the main pipeline 3 and the branch pipeline 4 are made of aluminum alloy. Aluminum alloy has the advantages of low density, high strength and strong machinability, which is beneficial to reducing the mass of the gas distributor 2 and to the integral molding of the gas distributor 2.

[0039] The gas distributor 2 can be manufactured by at least one of the following processes: 3D printing, investment casting, extrusion molding, hot rolling, and cold drawing.

[0040] In some embodiments, the gas distributor 2 is manufactured using 3D printing or investment casting processes.

[0041] In some embodiments, the gas distributor 2 is processed by a combination of extrusion molding, hot rolling and cold drawing processes.

[0042] It should be noted that when the main pipe 3 is processed and formed, the second end of the main pipe 3 is already in a closed state, and there is no need to seal it with a flange, which can further reduce the number of leakage points.

[0043] In this embodiment, the axis of branch pipe 4 is perpendicular to the axis of branch pipe 4. Each group of branch pipes 4 includes at least two branch pipes 4, and the two groups of branch pipes 4 are staggered. Figure 1 .

[0044] Each group of branch pipes 4 may include 2 to 5 branch pipes 4, specifically, each group of branch pipes 4 includes 3 branch pipes 4.

[0045] In a further embodiment, the connecting pipe 5 is configured as a rigid pipe; specifically, an aluminum alloy pipe can be selected as the connecting pipe 5. The dial faces of each pressure gauge 8 face the same side, and the dial faces of each pressure gauge 8 are perpendicular to the axis of the main pipe 3. Simultaneously, along the axial direction of the main pipe 3, the projected areas of the dial faces of each pressure gauge 8 do not intersect.

[0046] With this setup, test personnel can simultaneously observe the pressure values ​​displayed by each pressure gauge 8 on one side of the gas distributor 2, avoiding blind spots, improving test convenience, and enhancing test efficiency.

[0047] In a specific embodiment, each pressure gauge 8 can be connected to the connecting pipe 5 via a flexible metal tube 9, as shown in the reference. Figure 2 The flexible metal tube 9 can deform under stress and provide stable support for the pressure gauges 8. During specific tests, the shape of the flexible metal tube 9 corresponding to each pressure gauge 8 can be adjusted as needed, thereby adjusting the position of each pressure gauge 8.

[0048] The aforementioned flexible metal tube 9 may be, but is not limited to, one of a metal corrugated tube, a spring tube, and a gooseneck tube.

[0049] In this embodiment of the present invention, the pressure gauge 8 is a digital pressure gauge. The digital pressure gauge directly displays the measured pressure value in digital form, which avoids the visual error caused by the test personnel relying on the pointer position degree and helps to improve the accuracy of reading the pressure value.

[0050] The pressure gauge 8 has a range of 0~2.5MPa.

[0051] In this embodiment, the instrument tube pressure testing device also includes a timer 10, which can count down and issue a prompt message when the countdown ends to remind the test personnel.

[0052] The timing time of Timer 10 is adjustable from 0 to 60 minutes, with a timing accuracy of 1 second.

[0053] In this embodiment of the present invention, the instrument tube pressure testing device further includes a high-pressure hose 11, which is disposed at the second end of the connecting pipe 5. The first end of the high-pressure hose 11 is connected to the second end of the connecting pipe 5, and the second end of the high-pressure hose 11 is used to connect to the instrument tube.

[0054] The connecting pipe 5 is a rigid pipe. A high-pressure hose 11 is added to the connecting pipe 5, which can reduce vibration interference and facilitate the adjustment of the connection direction with the instrument pipe. This reduces the requirements for the placement position and attitude angle of the instrument pipe when connecting it to the instrument pipe air pressure testing device provided in this embodiment of the utility model.

[0055] A CPC quick-connect fitting 14 can be installed at the second end of the high-pressure hose 11 for easy connection to the instrument tube. The CPC quick-connect fitting 14 has a self-locking anti-disconnection structure to ensure the connection between the instrument tube and the high-pressure hose 11. The CPC quick-connect fitting 14 has a pressure resistance greater than or equal to 2.0 MPa.

[0056] In this embodiment, a portable air pump is selected as the air pump 1. The portable air pump is lightweight, weighing less than 10 kg, making it easy to carry and transport. Furthermore, the portable air pump is powered by a safe DC 24V / 12V voltage, ensuring safe operation. The portable air pump also integrates automatic pressure holding and depressurization functions, and can depressurize the entire system when the corresponding shut-off valves 6 in each branch pipe 4 are open.

[0057] In addition, the portable air pump has a rechargeable battery, which allows it to operate normally without being connected to mains power, thus avoiding dependence on mains power.

[0058] The instrument pipe pressure testing device provided in this embodiment also includes a pressure reducing valve 12 and an overflow valve 13, which are connected in series between the first end of the main pipe 3 and the air pump 1. The pressure reducing valve 12 reduces the pressure based on the air pressure output by the air pump 1 and has a stable output pressure. The overflow valve 13 can prevent the entire device from being over-pressurized.

[0059] The pressure regulating range of pressure reducing valve 12 is 0~1.6MPa.

[0060] In some embodiments, the instrument tube pressure testing device further includes a housing. The air pump 1, gas distributor 2, connecting pipe 5, shut-off valve 6, exhaust valve 7, high-pressure hose 11, pressure reducing valve 12, and overflow valve 13 are all located inside the housing. The operating handles of the shut-off valve 6 and exhaust valve 7 are located outside the housing, and the second end of the high-pressure hose 11 extends to the outside of the housing. This allows the instrument tube to be connected to the high-pressure hose 11 from outside the housing, and the shut-off valve 6 and exhaust valve 7 to be operated from outside the housing. The charging port start / stop button of the air pump 1 and the pressure gauge 8 can be located on the housing for convenient operation.

[0061] This configuration integrates the instrument tube pressure testing device into a single testing module, making it easy to transport and eliminating the need for on-site assembly of the instrument tube pressure testing device itself, thus making operation more convenient.

[0062] Drive wheels can also be installed on the housing to allow the instrument tube pressure testing device to be moved.

[0063] In summary, the instrument tube pneumatic testing device provided by this utility model embodiment can improve the pneumatic testing process, realize the parallel testing of multiple instrument tubes, significantly shorten the overall operation cycle, and improve testing efficiency; it also reduces repetitive labor and human intervention, thus reducing labor intensity; it adopts a lightweight design and low-voltage power supply to avoid the risk of electric shock, optimizes equipment portability, and enhances safety performance; it reduces reliance on manual labor, increases the coverage of a single test, reduces overall construction costs, and reduces costs while increasing efficiency.

[0064] The following describes in detail the process of testing the instrument tube using the instrument tube pressure testing device provided in this embodiment of the present invention, in accordance with the testing standards.

[0065] First, connect the instrument tube to the CPC quick connector 14 on the high-pressure hose 11 and ensure a tight seal.

[0066] Then, the target test pressure is set through the pressure reducing valve 12. The target test pressure is 1.15 times the design pressure of the instrument tube (e.g., 0.6 MPa).

[0067] Then, start the portable air pump, and gas is simultaneously injected into each instrument tube via the gas distributor 2. During the inflation process, observe the pressure value displayed on the pressure gauge 8 corresponding to each instrument tube. When the pressure value displayed on the pressure gauge 8 reaches the target test pressure, close the corresponding shut-off valve 6 and start the first pressure holding test. At the same time, set the first pressure holding time on the timer 10. For example, if the first pressure holding time is 10 minutes, the timer 10 will start counting down.

[0068] If the pressure value displayed by pressure gauge 8 does not decrease significantly before the countdown of timer 10 ends, the first pressure holding test of the instrument tube corresponding to pressure gauge 8 is considered to be qualified. If the pressure value displayed by pressure gauge 8 decreases significantly, it indicates that there is an abnormality in the test branch or instrument tube corresponding to pressure gauge 8. Troubleshooting is required to determine the specific location of the abnormality, thereby determining whether the first pressure holding test of the instrument tube corresponding to pressure gauge 8 is qualified.

[0069] The instrument tubes that pass the first pressure holding test require further testing. Specifically, the inflation pressure is reduced to the design pressure (e.g., 0.6 MPa) using the pressure relief valve corresponding to the instrument tube that passed the first pressure holding test. A second pressure holding time is then set in timer 10, for example, 5 minutes, and timer 10 begins counting down.

[0070] If the pressure value displayed by pressure gauge 8 does not decrease significantly before the countdown of timer 10 ends, the second pressure holding test of the instrument tube corresponding to pressure gauge 8 is considered to be qualified. If the pressure value displayed by pressure gauge 8 decreases significantly, it indicates that there is an abnormality in the test branch or instrument tube corresponding to pressure gauge 8. Troubleshooting is required to determine the specific location of the abnormality, thereby determining whether the second pressure holding test of the instrument tube corresponding to pressure gauge 8 is qualified.

[0071] Only instrument tubes that pass both the first and second pressure holding tests are considered to have passed the air pressure test.

[0072] After completing the test, remove the instrument tube to finish the test. You can then proceed with testing the remaining instrument tubes.

[0073] Extensive experimental statistics have shown that the instrument tube pneumatic testing device provided in this embodiment can simultaneously pressurize 4 to 6 instrument tubes, increasing the efficiency of a single operation by 400% to 600%. Combined with the CPC quick-connect connector 14, the testing cycle can be significantly shortened. The use of a 24V / 12V DC power supply and a lightweight portable air pump completely eliminates the risk of electric shock and enhances portability. It comprehensively saves over 60% of labor costs, reduces maintenance costs by 40%, and consumes only 30% of the energy of traditional equipment, achieving efficient, accurate, safe, and economical instrument tube pneumatic testing.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An instrument tube pressure testing device, characterized in that, include: Air pump (1); The gas distributor (2) includes a main pipe (3) and two sets of branch pipes (4). The first end of the main pipe (3) is connected to the gas pump (1), and the second end of the main pipe (3) is closed. The two sets of branch pipes (4) are distributed on both sides of the main pipe (3). The first end of the branch pipe (4) is connected to the side wall of the main pipe (3), and the branch pipe (4) is connected to the main pipe (3). The main pipe (3) and the two sets of branch pipes (4) are integrally formed. Connecting pipe (5), each of the branch pipes (4) corresponds to one connecting pipe (5), the first end of the connecting pipe (5) is connected to the second end of the branch pipe (4) through a shut-off valve (6), the second end of the connecting pipe (5) is adapted to connect to an instrument pipe, and an exhaust valve (7) and a pressure gauge (8) are provided on the connecting pipe (5).

2. The instrument tube pressure testing device according to claim 1, characterized in that, The main pipeline (3) and the branch pipeline (4) are made of aluminum alloy. The gas distributor (2) is formed by at least one of 3D printing, investment casting, extrusion molding, hot rolling and cold drawing processes.

3. The instrument tube pressure testing device according to claim 1, characterized in that, The axis of the branch pipe (4) is perpendicular to the axis of the branch pipe (4), and each group of the branch pipe (4) includes at least two branch pipes (4), and the two groups of branch pipes (4) are staggered.

4. The instrument tube air pressure testing device according to claim 1, characterized in that, The connecting pipe (5) is a rigid pipe, and the dial faces of each pressure gauge (8) face the same side. The normal of the dial face of each pressure gauge (8) is parallel to the axis of the main pipe (3). Along the axial direction of the main pipeline (3), the projected areas of the dial surfaces of each pressure gauge (8) do not intersect.

5. The instrument tube air pressure testing device according to claim 4, characterized in that, Each of the pressure gauges (8) is connected to the connecting pipe (5) via a flexible metal tube (9), which includes one of a metal bellows, a spring tube, and a gooseneck tube.

6. The instrument tube pressure testing device according to claim 1, characterized in that, The pressure gauge (8) is a digital pressure gauge.

7. The instrument tube pressure testing device according to claim 1, characterized in that, Also includes: A timer (10) is adapted to count down, and the timer (10) is adapted to issue a prompt message when the countdown ends.

8. The instrument tube pressure testing device according to claim 1, characterized in that, Also includes: A high-pressure hose (11) is provided at the second end of the connecting pipe (5). The first end of the high-pressure hose (11) is connected to the second end of the connecting pipe (5). The second end of the high-pressure hose (11) is adapted to connect to the instrument pipe.

9. The instrument tube pressure testing device according to claim 1, characterized in that, The air pump (1) is a portable air pump.

10. The instrument tube pressure testing device according to claim 1, characterized in that, It also includes a pressure reducing valve (12) and an overflow valve (13), which are connected in series between the first end of the main pipeline (3) and the air pump (1).

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