A pressure pipeline leakage testing device

Abstract

The utility model relates to a gas leakage test technical field, and disclose a kind of pressure pipeline gas leakage test device, including two pressure pipelines to be detected, two the pressure pipeline port butt joint after welding, the periphery detachable sleeve of pressure pipeline welding place has two semicircle test shell, two semicircle test shell are spliced into whole circle test shell by clamping component, the whole circle test shell forms ring hoop structure to pressure pipeline outside, and enclosed between the outer tube wall of pressure pipeline and forms the closed air cavity, the semicircle test shell outside is fixedly connected with aeration component, the aeration component passes through aeration hole and is inhaled into the detection gas for detecting leakage in air cavity, the semicircle test shell inside is fixedly connected with pressure sensor.The pressure pipeline gas leakage test device, with can be directly to the gas leakage test of splicing place after splicing to pressure pipeline, improves the overall operation simplicity and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of air leakage testing technology, specifically to a pressure pipeline air leakage testing device. Background Technology

[0002] Pressure pipelines refer to tubular equipment and auxiliary facilities used to transport gases, liquids, or gas-liquid mixtures, and have certain pressure, temperature, and medium characteristics. They are widely used in industrial production, energy supply, urban infrastructure, and other fields. Because they involve pressure bearing capacity and medium transportation safety, they are classified as special equipment.

[0003] Existing pressure pipelines are typically assembled from multiple pipe components during use. These components are usually connected by flanges or welding. After the pipeline is installed, all connections must be tested for air tightness to ensure that the pressure pipeline will not leak due to poor sealing during subsequent use.

[0004] Traditional pressure pipeline leak testing devices typically operate by first sealing both ends of the installed pressure pipeline, then filling the pipeline with air, and finally observing the pressure gauge readings to determine if the pipeline connection is airtight. However, when testing a pipeline composed of multiple sections joined together, the numerous joints make it impossible to directly locate the specific leaking connection. This results in subsequent repairs and replacements requiring significant additional time and being inefficient. Therefore, a new pressure pipeline leak testing device is proposed to address these issues. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a pressure pipeline leakage testing device. It has the advantages of being able to directly test the leakage at the splice after the pressure pipeline is assembled, thus improving the overall ease of operation. It solves the problem that when testing a complete pipeline composed of multiple pipeline segments, it is impossible to directly locate the specific leaking connection due to the large number of splice ports, which leads to subsequent maintenance and replacement work requiring a lot of extra time and resulting in low efficiency.

[0007] (II) Technical Solution

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A pressure pipeline leakage testing device includes two pressure pipelines to be tested. The two pressure pipelines are welded together at their ports. Two semi-circular test shells are detachably fitted around the welded joint of the pressure pipelines. The two semi-circular test shells are spliced ​​together by a snap-fit ​​assembly to form a complete circular test shell. The complete circular test shell forms a ring structure around the outside of the pressure pipeline and encloses a sealed air cavity between itself and the outer wall of the pressure pipeline. A venting assembly is fixedly connected to the outside of the semi-circular test shell. The venting assembly introduces detection gas for leak detection into the air cavity through a vent hole. A pressure sensor is fixedly connected to the inside of the semi-circular test shell. The pressure sensor is used to detect the pressure change in the air cavity in real time to determine whether there is a leak at the welded joint of the pressure pipeline.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, auxiliary shells are fixedly connected to both axial end faces of the semi-circular test shell. The auxiliary shells are arc-shaped structures adapted to the outer wall of the pressure pipe. A first sealing ring is fixedly connected to the inner side of the auxiliary shell. The first sealing ring is in close contact with the outer wall of the pressure pipe to enhance the sealing performance at both ends of the air chamber.

[0011] Furthermore, the semi-circular test shell includes a semi-circular shell, a connecting plate, and a second sealing gasket. There are two connecting plates, and the two connecting plates are symmetrically fixedly connected to the outside of the semi-circular shell. The second sealing gasket is fixedly connected to the outside of the connecting plates. When the two semi-circular test shells are spliced ​​together, the connecting plates of the two semi-circular test shells are tightly fitted together through the second sealing gasket to achieve a seal between the connecting plates.

[0012] Furthermore, the snap-fit ​​assembly includes a snap-fit ​​shell, a pull handle, and a third sealing gasket. The snap-fit ​​shell has a U-shaped structure, and the third sealing gasket is fixedly connected to the inner wall of the snap-fit ​​shell. The snap-fit ​​shell is detachably fitted into the connecting plate of the two semi-circular test shells and the outer side of the auxiliary shell through the third sealing gasket, so as to realize the detachable and fixed splicing of the two semi-circular test shells. The third sealing gasket is in close contact with the outer wall of the connecting plate and the auxiliary shell, enhancing the sealing performance at the snap-fit ​​point. The pull handle is fixedly connected to the outer wall of the snap-fit ​​shell for convenient disassembly and assembly of the snap-fit ​​shell.

[0013] Furthermore, the ventilation assembly includes a ventilation shell, a connecting port, and a ventilation hose. The ventilation shell is fixedly connected to the outer wall of the semi-circular test shell and communicates with the ventilation hole. One end of the connecting port is fixedly connected to the outer wall of the ventilation shell and communicates internally, while the other end is sealed and communicated with one end of the ventilation hose. The other end of the ventilation hose is used to connect to an external detection gas supply device. The ventilation hose, connecting port, ventilation shell, and ventilation hole are sequentially connected to form a ventilation channel for supplying detection gas to the gas chamber. The connection between the connecting port and the ventilation hose is provided with a sealing structure to prevent detection gas leakage.

[0014] Furthermore, it also includes multiple partition plates, which are fixedly connected to the inner wall of the semi-circular test shell at intervals along the axial direction of the pressure pipe; a fourth sealing gasket is fixedly connected to the free end of each partition plate, and the fourth sealing gasket is in close contact with the outer wall of the pressure pipe; the multiple partition plates divide the air chamber into multiple independent sub-air chambers, and each sub-air chamber is equipped with at least one pressure sensor to realize the detection and location of air leakage in different areas of the welded joint of the pressure pipe.

[0015] The beneficial effects of this utility model are:

[0016] This pressure pipeline leakage testing device has the advantages of being able to perform leakage tests on the joints directly after the pressure pipeline is assembled, thus improving the overall ease of operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a half-sectional view of the structure of this utility model;

[0019] Figure 3 This is a diagram showing the connection between the partition plate and the fourth sealing gasket of this utility model;

[0020] Figure 4 This is a connection diagram of the air chamber and vent of this utility model;

[0021] Figure 5 This is a diagram showing the connection between the auxiliary shell and the first sealing gasket of this utility model.

[0022] In the diagram: 1. Pressure pipe; 2. Semicircular test shell; 21. Semicircular shell; 22. Connecting plate; 23. Second sealing gasket; 3. Snap-fit ​​assembly; 31. Snap-fit ​​shell; 32. Pull handle; 33. Third sealing gasket; 4. Air chamber; 5. Ventilation assembly; 51. Ventilation shell; 52. Connecting port; 53. Ventilation hose; 6. Ventilation hole; 7. Pressure sensor; 8. Auxiliary shell; 9. First sealing ring; 11. Partition plate; 12. Fourth sealing gasket. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1, by Figure 1-5 This invention discloses a pressure pipeline leakage testing device, comprising two pressure pipelines 1 to be tested, the ends of which are welded together. Two semi-circular test shells 2 are detachably fitted around the welded joint of the pressure pipelines 1. The two semi-circular test shells 2 are spliced ​​together by a snap-fit ​​assembly 3 to form a full circular test shell. The full circular test shell forms a ring structure around the outside of the pressure pipelines 1 and encloses a sealed air cavity 4 between itself and the outer wall of the pressure pipelines 1. A venting assembly 5 is fixedly connected to the outside of the semi-circular test shells 2. The venting assembly 5 introduces detection gas for leak detection into the air cavity 4 through a vent hole 6. A pressure sensor 7 is fixedly connected to the inside of the semi-circular test shells 2. The pressure sensor 7 is used to detect pressure changes in the air cavity 4 in real time to determine whether there is a leak at the welded joint of the pressure pipelines 1.

[0025] During and after ventilation, the pressure sensor 7 fixed inside the semi-circular test shell 2 will continuously monitor the pressure inside the air chamber 4. By observing the pressure data changes fed back by the pressure sensor 7, if the pressure remains stable, it indicates that there is no air leakage at the weld; if the pressure drops, it indicates that there is an air leakage problem at the weld.

[0026] This application forms a sealed air chamber 4 by welding two pressure pipes 1 together and splicing them into a full circular test shell 2. This chamber, along with a venting assembly 5 to introduce detection gas and a pressure sensor 7 to monitor pressure in real time, enables rapid and accurate determination of whether there is a leak at the weld joint of the pressure pipes 1. The detachable design of the semi-circular test shell 2 facilitates reuse at different weld joints, improving the versatility and practicality of the device. Simultaneously, the ring structure ensures the airtightness of the air chamber 4, providing a foundation for accurate leak detection. The vent hole 6 serves as the channel for the venting assembly 5 to deliver detection gas to the air chamber 4, ensuring smooth gas delivery.

[0027] In this embodiment, auxiliary shells 8 can also be fixedly installed at the two axial end faces of each semicircular test shell 2. Since the auxiliary shell 8 is designed as an arc-shaped structure that matches the shape of the outer wall of the pressure pipe 1, when the semicircular test shell 2 is fitted around the welded part of the pressure pipe 1, the auxiliary shell 8 will naturally fit against the outer side of the outer wall of the pressure pipe 1. The first sealing ring 9 pre-fixed on the inner side of the auxiliary shell 8 will form a tight compression contact with the outer wall of the pressure pipe 1, thereby filling the gap that may exist between the auxiliary shell 8 and the outer wall of the pressure pipe 1, effectively sealing the possible air leakage channels at both ends of the air chamber 4, further enhancing the overall sealing of the air chamber 4, and avoiding the leakage of the detection gas due to insufficient sealing at both ends of the air chamber 4, which would affect the accuracy of the leakage detection results.

[0028] Meanwhile, the semi-circular test shell 2 is composed of a semi-circular shell 21, two connecting plates 22, and a second sealing gasket 23. The two connecting plates 22 are fixedly connected to the outside of the semi-circular shell 21 in a symmetrical manner, and a second sealing gasket 23 is fixedly installed on the outside of each connecting plate 22. When it is necessary to splice the two semi-circular test shells 2 into a complete circular test shell, the connecting plates 22 of the two semi-circular test shells 2 are aligned with each other, so that the second sealing gasket 23 on the connecting plate 22 of one semi-circular test shell 2 contacts the surface of the connecting plate 22 of the other semi-circular test shell 2. As the splicing operation proceeds, the two connecting plates 22 will gradually approach each other and achieve a tight fit through the second sealing gasket 23. Then, the two semi-circular test shells 2 are fixed by the snap-fit ​​assembly 3.

[0029] In this embodiment, the snap-fit ​​assembly 3 includes a U-shaped snap-fit ​​shell 31, a pull handle 32, and a third sealing gasket 33. The third sealing gasket 33 is pre-fixed to the inner wall of the snap-fit ​​shell 31. When it is necessary to fix and splice two semi-circular test shells 2, the snap-fit ​​shell 31 is aligned with the connecting plate 22 and the outer side of the auxiliary shell 8 of the two semi-circular test shells 2, so that the snap-fit ​​shell 31 is embedded in the outer side of the connecting plate 22 and the auxiliary shell 8 through the third sealing gasket 33 on the inner wall. At this time, the third sealing gasket 33 will simultaneously form a tight contact with the outer wall of the connecting plate 22 and the auxiliary shell 8, thereby fixing the two semi-circular test shells 2 together. When it is necessary to disassemble the snap-fit ​​assembly 3, the operator holds the pull handle 32 fixed to the outer wall of the snap-fit ​​shell 31 and pulls it away from the semi-circular test shell 2 to remove the snap-fit ​​shell 31 from the outer side of the connecting plate 22 and the auxiliary shell 8.

[0030] The ventilation assembly 5 includes a ventilation shell 51, a connection port 52, and a ventilation hose 53. The ventilation shell 51 is fixedly connected to the outer wall of the semi-circular test shell 2 and is connected to the ventilation hole 6. One end of the connection port 52 is fixedly connected to the outer wall of the ventilation shell 51 and is internally connected, while the other end is sealed to one end of the ventilation hose 53. The other end of the ventilation hose 53 is used to connect to an external detection gas supply device. The ventilation hose 53, the connection port 52, the ventilation shell 51, and the ventilation hole 6 are connected in sequence to form a ventilation channel for supplying detection gas to the air chamber 4. The connection between the connection port 52 and the ventilation hose 53 is provided with a sealing structure such as a sealing thread or a quick-connect sealing buckle to prevent detection gas leakage.

[0031] Furthermore, the ventilation hoses 53 on the upper and lower sides are provided with a certain amount of excess length. The other end of the two ventilation hoses 53 can be connected to a three-way pipe. The other end of the three-way pipe can be connected to a ventilation device, thereby improving the overall ventilation effect.

[0032] In Example 2, based on the above examples, multiple partition plates 11 can be fixedly installed on the inner wall of the semi-circular test shell 2 in a manner that is spaced apart along the axial direction of the pressure pipe 1. A fourth sealing gasket 12 is fixedly connected to the free end of each partition plate 11. When the semi-circular test shell 2 is fitted onto the outer periphery of the welded joint of the pressure pipe 1 and spliced ​​into a complete circular test shell, the fourth sealing gasket 12 at the free end of the partition plate 11 will form a tight compression contact with the outer wall of the pressure pipe 1, thereby dividing the original integral air chamber 4 into multiple independent sub-air chambers by the multiple partition plates 11. At least one pressure sensor 7 is installed in each sub-air chamber. When performing leak detection, the pressure sensor 7 in each sub-air chamber monitors the pressure change of its respective sub-air chamber, which can more quickly locate the leak area.

[0033] By setting multiple partition plates 11 with fourth sealing gaskets 12, the air chamber 4 is divided into independent sub-air chambers, and a pressure sensor 7 is set in each sub-air chamber. This allows for precise location of the leakage area at the weld of the pressure pipe 1. When the pressure sensor 7 of a certain sub-air chamber detects a pressure drop, it can be determined that there is a leak in the weld area corresponding to that sub-air chamber. This changes the limitation of traditional overall air chamber 4 detection, which can only determine whether there is a leak but cannot determine the location of the leak.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure pipeline leakage testing device, comprising two pressure pipelines (1) to be tested, characterized in that: After the two pressure pipes (1) are connected and welded, two semi-circular test shells (2) are detachably fitted on the outer periphery of the welded joint of the pressure pipes (1). The two semi-circular test shells (2) are spliced ​​into a whole circular test shell by a snap-fit ​​assembly (3). The whole circular test shell forms a ring structure on the outside of the pressure pipes (1) and forms a sealed air cavity (4) between it and the outer wall of the pressure pipes (1). A ventilation assembly (5) is fixedly connected to the outside of the semi-circular test shells (2). The ventilation assembly (5) introduces detection gas for detecting leakage into the air cavity (4) through the ventilation hole (6). A pressure sensor (7) is fixedly connected to the inside of the semi-circular test shells (2).

2. The pressure pipeline leakage testing device according to claim 1, characterized in that: The two axial end faces of the semi-circular test shell (2) are fixedly connected to auxiliary shells (8). The auxiliary shell (8) is an arc-shaped structure adapted to the outer wall of the pressure pipe (1). The inner side of the auxiliary shell (8) is fixedly connected to a first sealing ring (9). The first sealing ring (9) is in close contact with the outer wall of the pressure pipe (1).

3. The pressure pipeline leakage testing device according to claim 2, characterized in that: The semicircular test shell (2) includes a semicircular shell (21), a connecting plate (22) and a second sealing gasket (23). There are two connecting plates (22), and the two connecting plates (22) are symmetrically fixedly connected to the outside of the semicircular shell (21). The second sealing gasket (23) is fixedly connected to the outside of the connecting plate (22).

4. The pressure pipeline leakage testing device according to claim 3, characterized in that: The snap-fit ​​assembly (3) includes a snap-fit ​​shell (31), a pull handle (32), and a third sealing gasket (33). The snap-fit ​​shell (31) has a U-shaped structure, and the third sealing gasket (33) is fixedly connected to the inner wall of the snap-fit ​​shell (31). The snap-fit ​​shell (31) is detachably embedded in the connecting plate (22) of the two semi-circular test shells (2) and the outer side of the auxiliary shell (8) through the third sealing gasket (33). The third sealing gasket (33) is in close contact with the outer side walls of the connecting plate (22) and the auxiliary shell (8). The pull handle (32) is fixedly connected to the outer side wall of the snap-fit ​​shell (31).

5. The pressure pipeline leakage testing device according to claim 1, characterized in that: The ventilation assembly (5) includes a ventilation shell (51), a connection port (52), and a ventilation hose (53). The ventilation shell (51) is fixedly connected to the outer wall of the semi-circular test shell (2) and is connected to the ventilation hole (6). One end of the connection port (52) is fixedly connected to the outer wall of the ventilation shell (51) and is internally connected, while the other end is sealed to one end of the ventilation hose (53). The other end of the ventilation hose (53) is used to connect to an external detection gas supply device. The ventilation hose (53), connection port (52), ventilation shell (51), and ventilation hole (6) are connected in sequence to form a ventilation channel for delivering detection gas to the air chamber (4).

6. The pressure pipeline leakage testing device according to claim 1, characterized in that: It also includes multiple partition plates (11), which are fixedly connected to the inner wall of the semi-circular test shell (2) at intervals along the axial direction of the pressure pipe (1); the free end of each partition plate (11) is fixedly connected to a fourth sealing gasket (12), which is in close contact with the outer wall of the pressure pipe (1); the multiple partition plates (11) divide the air chamber (4) into multiple independent sub-air chambers, and each sub-air chamber is provided with at least one pressure sensor (7).

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