Corrugated pipe pressure leakage detection tool

Abstract

The utility model discloses a corrugated pipe pressure leakage detection tool, and aims to accurately and efficiently detect the sealing performance of a corrugated pipe. The tool comprises a frame body, an embedded solution tank and a lifting and sealing assembly. The sealing assembly is composed of a long-strip-shaped carrying table, a press seal, a limiting base and the like, the limiting base is provided with a U-shaped notch for clamping and fixing the end of the corrugated pipe, and the press seal assembly injects air into the corrugated pipe through a first air cylinder and the connecting assembly. The lifting assembly drives the carrying table to ascend and descend through a supporting rod, a transverse plate and a second air cylinder, and the carrying table is adjustably connected with the telescopic rod through an L-shaped connecting piece. The detection liquid is water, and the elastic plug of the connecting assembly is in a cone frustum shape. All parts of the tool work cooperatively, the tool is suitable for various corrugated pipe specifications, sealing is reliable, positioning is accurate, and the detection accuracy and operation convenience are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-destructive testing of pipeline components, in particular to a tool for detecting pressure leakage of a bellows. Background Art

[0002] Bellows are flexible components. With their unique corrugated structure, they can effectively compensate for deformation of the pipeline caused by factors such as thermal expansion and contraction, displacement changes, etc., thereby maintaining the stable operation of the pipeline system. However, during the production and manufacturing of bellows, defects such as fine cracks and sand holes may appear on the pipe wall, which greatly reduces its sealing performance. Once put into use, it is very easy to cause medium leakage, which not only causes energy waste and material loss, but in severe cases may even induce safety accidents.

[0003] Currently, the most common technical method for detecting pressure leaks in bellows is air pressure testing. The general operating procedure is as follows: First, seal one end of the bellows to be tested tightly. Then, use an air pump to inject gas at a specific pressure into the bellows. After the injected gas reaches the preset pressure value, stop adding gas. Then, use a high-precision pressure sensor to continuously monitor the air pressure value inside the bellows. Inspectors will determine whether the bellows has a leak based on the changes in air pressure. If the air pressure drops beyond the set threshold within a specified period of time, it means that the bellows is not sealed well and there is a risk of leakage. However, relying solely on pressure sensors to monitor air pressure changes makes it difficult to accurately locate the specific location of the leak. When a small leak occurs in the bellows, the pressure change is subtle and it is very easy to be mistaken for a qualified product, resulting in defective products flowing into subsequent processes or the market. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a bellows pressure leakage detection tooling, which achieves accurate, efficient and low-cost bellows pressure leakage detection effect through a unique mechanical structure combination and functional collaborative design.

[0005] Technical solution: The utility model provides a bellows pressure leakage detection tool including a frame, a solution tank embedded in the frame, the solution tank is filled with detection liquid, a lifting assembly and a sealing assembly, the lifting assembly is arranged on the frame, the sealing assembly is connected to the lifting assembly, and is used to seal the bellows and inject gas into the bellows, and the lifting assembly is used to drive the sealing assembly to immerse in and out of the detection liquid. The sealing assembly can accurately fit the bellows port to form a reliable seal. This sealing structure is specially designed for the special shape of the bellows, which can effectively isolate the external environment from the internal space of the bellows, ensuring that gas will not leak during subsequent gas injection testing, laying the foundation for accurate detection of pressure leakage, and meeting the sealing requirements of bellows with different diameters and wall thicknesses. The lifting assembly accurately controls the lifting and lowering movements of the sealing assembly and the connected bellows, and steadily immerses the sealed bellows in the detection liquid in the solution tank, or lifts it out of the detection liquid. Its stroke control is highly precise, allowing for flexible adjustment of immersion depth and duration based on the testing process and time requirements. This ensures that all parts of the bellows remain in contact with the test fluid for sufficient time, facilitating accurate detection of leaks. The sealing assembly not only performs the sealing task but also incorporates a built-in gas injection channel, connecting the external gas source with the inner cavity of the bellows. After sealing is complete, gas can be steadily injected into the bellows at a set pressure, gradually increasing the internal pressure to the test standard pressure, simulating the actual operating pressure environment and enabling precise testing of the bellows' sealing performance under pressure.

[0006] Furthermore, the present application provides a tool for detecting pressure leakage of a bellows, wherein the sealing assembly comprises a long strip carrier, a pair of pressure sealing assemblies, a pair of limit seats, and a pair of adjustment plates. The adjustment plates are mounted on both ends of the carrier by screws. The pressure sealing assembly, limit seats, and adjustment plates correspond one to one. The pressure sealing assembly and limit seats are mounted on the adjustment plates facing each other. The two ends of the bellows are respectively clamped on the corresponding limit seats. The lifting assembly is used to drive the carrier to move up and down. The pressure sealing assembly is used to pressurize and seal the bellows and inject pressurized gas into the bellows. A pair of adjustment plates are mounted on both ends of the long strip carrier by screws. This flexibly adjustable connection method gives the sealing assembly excellent adaptability. The operator can accurately fine-tune the position of the adjustment plate according to the specific diameter and length of the bellows, change the spacing between the pressure sealing assembly and the limit seats, firmly match bellows of different specifications, broaden the scope of application of the tool, and meet the production and detection needs of multiple categories. A pair of limit seats are mounted on the adjustment plate facing each other, and are precisely clamped and matched with the two ends of the bellows. The limit seat is specially customized according to the bellows port structure, accurately positioning the bellows in the horizontal and vertical directions to prevent the bellows from displacement and shaking during the detection process, ensuring a constant pressure sealing position and creating ideal conditions for subsequent stable gas injection and precise pressure leak detection.

[0007] Furthermore, a bellows pressure leakage detection tool in the present application, the pressure sealing component includes a first cylinder, the output end of the first cylinder is equipped with a connecting component, the connecting component is connected to the end of the bellows, and air is injected into the bellows through the connecting component. The first cylinder serves as a core power component and can accurately output stable thrust according to preset air pressure parameters. With the help of the connecting component, the cylinder power is evenly and accurately transmitted to the end of the bellows, ensuring that the sealing surface fits tightly, the pressure is controllable and constant, and the sealing pressure standards required for different types of bellows are met, effectively avoiding the problem of sealing failure caused by uneven and insufficient pressure, and laying a solid foundation for subsequent reliable air injection and precise detection. The connecting component is firmly connected to the output end of the first cylinder, not only shouldering the heavy responsibility of transmitting pressure, but also having a built-in air injection channel, cleverly constructing a communication path between the air source and the inner cavity of the bellows.

[0008] Furthermore, a bellows pressure leakage detection tool in the present application, the connecting assembly includes: a gas injection connector, the gas injection connector is cylindrical, a gas injection port is provided on the radial side, a raised gas outlet is provided axially, and the gas outlet is sleeved with an elastic plug. The elastic plug sleeved on the gas outlet plays a key sealing role. When not connected to the bellows, the elastic plug can rely on its own elastic properties to tightly block the gas outlet, prevent external impurities from entering the gas injection channel, and ensure the cleanliness of the gas injection system. After being connected to the bellows, the elastic plug can adapt to the shape of the bellows port to a certain extent, achieve a good sealing connection, and at the same time ensure that the gas can enter the bellows from the gas outlet in an orderly manner, avoid gas leakage, and assist in the precise control of the internal air pressure of the bellows.

[0009] Furthermore, in a bellows pressure leak detection tool disclosed herein, a U-shaped notch is provided on the stop seat, and the end of the bellows is retained within the U-shaped notch. The U-shaped notch on the stop seat enables precise positioning of the bellows in both the transverse and longitudinal dimensions, maintaining a fixed position during the detection process and preventing axial or radial displacement or shaking. The operator simply aligns and inserts the end of the bellows into the U-shaped notch to complete initial positioning, eliminating the need for complex alignment or additional fixing devices, resulting in simple and quick operation.

[0010] Furthermore, in the present application, a bellows pressure leak detection tool is provided, wherein the lifting assembly includes a strut, one end of which is mounted on a frame and the other end is connected to a cross plate, the strut being arranged vertically and the cross plate being arranged horizontally, the cross plate being capable of horizontal rotation about the strut, and a second cylinder being mounted on the end of the cross plate away from the strut, the output end of which is provided with a telescopic rod connected to a platform for driving the platform up and down. The horizontal rotation of the cross plate about the strut gives the sealing assembly a certain degree of flexibility in angle adjustment.

[0011] Furthermore, in a bellows pressure leak detection tool disclosed herein, an L-shaped connecting piece is mounted on the side of the platform, and the telescopic rod is adjustable and threadedly connected to the L-shaped connecting piece through a threaded hole provided in the L-shaped connecting piece. The threaded hole provided in the L-shaped connecting piece establishes an adjustable threaded connection between the telescopic rod and the platform. By screwing, the relative position of the telescopic rod and the platform can be flexibly changed, thereby achieving precise fine-tuning of the initial height of the platform and the lifting and lowering range.

[0012] Furthermore, in the present application, the bellows pressure leak detection tooling is provided, wherein the detection liquid is water. When the sealed bellows is immersed in the detection liquid, the detection liquid completely covers the outer surface of the bellows. When the bellows is under pressure and a leak occurs, gas will escape and form easily observable bubbles in the water, thereby visually displaying the leak and completing the detection function.

[0013] Furthermore, in a bellows pressure leakage detection tool in the present application, the elastic plug is in the shape of a truncated cone. The unique shape and structure of the truncated cone-shaped elastic plug give it excellent adaptability. When connected to the bellows port and the air outlet, the smaller end can be more easily inserted into the corresponding interface. As the insertion depth increases, the side wall of the elastic plug will gradually fit more closely with the contact surface due to its own elasticity. The degree of fit can be automatically adjusted according to the subtle size differences of different bellows ports and the specific specifications of the air outlet, achieving a good sealing effect and effectively preventing gas leakage.

[0014] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0015] 1. The bellows pressure leakage detection tool described in this utility model realizes accurate and efficient bellows pressure leakage detection through the exquisite coordination between the various components. The limit seat in the sealing component uses the U-shaped notch to accurately position the end of the bellows. In conjunction with the pressure sealing and air injection functions of the pressure sealing component, it ensures that the position of the bellows is stable during the detection process and that the internal air pressure can accurately reach the predetermined level, avoiding the influence of factors such as position offset or poor sealing on the detection results, greatly improving the accuracy of the detection, helping to strictly control the quality of the bellows products, and ensuring that the bellows put into use have good sealing properties.

[0016] 2. The bellows pressure leakage detection tool described in the present invention has strong applicability and easy operation due to the rational design of the lifting assembly, sealing assembly and other structures. The support rod, cross plate and second cylinder in the lifting assembly work together, and the cross plate can be rotated horizontally to facilitate the flexible adjustment of the sealing assembly orientation according to actual conditions. The movable adjustment of the platform can quickly fine-tune the bellows of different specifications, making it suitable for bellows products of various lengths and specifications. At the same time, the operation process is simple and the operator can easily get started, which can effectively shorten the detection time of a single bellows and improve the overall detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a bellows pressure leakage detection tool combined with a bellows structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a bellows pressure leakage detection tooling of the utility model;

[0019] Figure 3 This is a schematic diagram of the explosion of the pressure seal assembly in a bellows pressure leakage detection tooling of the utility model;

[0020] Figure 4 for Figure 2 A magnified schematic diagram of area A in the middle;

[0021] Figure 5 for Figure 2 Enlarged schematic diagram of area B in the middle.

[0022] Explanation of the reference numerals in the accompanying drawings in the specification: 1-frame, 2-solution tank, 3-lifting assembly, 4-sealing assembly, 41-long strip carrier, 42-pressure sealing assembly, 421-first cylinder, 422-connecting assembly, 4221-gas injection connector, 4222-gas injection port, 4223-gas outlet, 4224-elastic plug, 43-limiting seat, 431-U-shaped notch, 44-adjusting plate, 31-support rod, 32-cross plate, 33-second cylinder, 34-telescopic rod, 411-L-shaped connecting piece, 21-detection liquid. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1The bellows pressure leakage detection tool shown in the figure includes a frame 1, a solution tank 2 embedded in the frame 1, and a detection liquid 21 filled in the solution tank 2, a lifting component 3, and a sealing component 4. The lifting component 3 is arranged on the frame 1, and the sealing component 4 is connected to the lifting component 3, which is used to seal the bellows and inject gas into the bellows. The lifting component 3 is used to drive the sealing component 4 to immerse in and out of the detection liquid 21. The sealing component 4 can accurately fit the bellows port to form a reliable seal. This sealing structure is specially designed for the special shape of the bellows, which can effectively isolate the external environment from the internal space of the bellows, ensuring that gas will not leak during subsequent gas injection testing, laying the foundation for accurate detection of pressure leakage, and meeting the sealing requirements of bellows with different diameters and wall thicknesses. The lifting component 3 accurately controls the lifting and lowering of the sealing component 4 and the connected bellows, and smoothly immerses the sealed bellows in the detection liquid 21 in the solution tank 2, or lifts it out of the detection liquid 21. Its stroke control is highly precise, allowing for flexible adjustment of immersion depth and duration based on the testing process and time requirements. This ensures that all parts of the bellows remain in contact with the test fluid 21 for sufficient time, facilitating accurate detection of leaks. The sealing assembly 4 not only performs the sealing task but also incorporates a built-in gas injection channel, connecting the external gas source with the inner cavity of the bellows. After sealing is complete, gas can be steadily injected into the bellows at a set pressure, gradually increasing the internal pressure to the test standard pressure, simulating the actual operating pressure environment and enabling precise testing of the bellows' sealing performance under pressure.

[0025] In this embodiment, Figure 2 As shown, the sealing assembly 4 includes a long strip carrier 41, a pair of pressure-sealing assemblies 42, a pair of limit seats 43, and a pair of adjustment plates 44. The adjustment plates 44 are installed at both ends of the carrier 41 by screws. The pressure-sealing assemblies 42, limit seats 43 and adjustment plates 44 correspond to each other. The pressure-sealing assemblies 42 and limit seats 43 are installed on the adjustment plates 44 facing each other. The two ends of the bellows are respectively clamped on the corresponding limit seats 43. The lifting assembly 3 is used to drive the carrier 41 to move up and down. The pressure-sealing assembly 42 is used to press and seal the bellows and pressurize and inject air into the bellows. A pair of adjustment plates 44 are installed at both ends of the long strip carrier 41 by screws. This flexible and adjustable connection method gives the sealing assembly 4 excellent adaptability. The operator can accurately fine-tune the position of the adjustment plate 44 according to the specific diameter and length of the bellows, change the spacing between the pressure-sealing assembly 42 and the limit seat 43, firmly match bellows of different specifications, broaden the scope of application of the tooling, and meet the production and testing needs of multiple categories. A pair of limit seats 43 are installed facing each other on the adjustment plate 44, and are precisely locked with the ends of the bellows. The limit seats 43 are specially customized according to the bellows port structure, and accurately position the bellows in the horizontal and vertical directions to prevent the bellows from displacement and shaking during the detection process, ensuring a constant pressure seal position, creating ideal conditions for subsequent stable gas injection and accurate pressure leak detection.

[0026] In this embodiment, Figure 4 As shown, the pressure sealing component 42 includes a first cylinder 421, and a connecting component 422 is installed at the output end of the first cylinder 421. The connecting component 422 is connected to the end of the bellows, and gas is injected into the bellows through the connecting component 422. As the core power component, the first cylinder 421 can accurately output stable thrust according to the preset air pressure parameters. With the help of the connecting component 422, the cylinder power is evenly and accurately transmitted to the end of the bellows, ensuring that the sealing surface fits tightly, the pressure is controllable and constant, and meets the sealing pressure standards required for different types of bellows. It effectively avoids the problem of sealing failure caused by uneven and insufficient pressure, and lays a solid foundation for subsequent reliable gas injection and precise detection. The connecting component 422 is firmly connected to the output end of the first cylinder 421. It not only shoulders the task of transmitting pressure, but also has a built-in gas injection channel, cleverly constructing a communication path between the gas source and the inner cavity of the bellows.

[0027] In this embodiment, Figure 3 As shown, the connecting assembly 422 includes: a gas injection connector 4221, the gas injection connector 4221 is cylindrical, with a gas injection port 4222 on the radial side and a raised gas outlet 4223 on the axial side, and the gas outlet 4223 is sleeved with an elastic plug 4224. The elastic plug 4224 sleeved on the gas outlet 4223 plays a key sealing role. When not connected to the bellows, the elastic plug 4224 can rely on its own elastic properties to tightly block the gas outlet 4223, prevent external impurities from entering the gas injection channel, and ensure the cleanliness of the gas injection system. After being connected to the bellows, the elastic plug 4224 can adapt to the shape of the bellows port to a certain extent, achieve a good sealing connection, and at the same time ensure that the gas can enter the bellows from the gas outlet 4223 in an orderly manner, avoid gas leakage, and assist in accurately controlling the internal air pressure of the bellows.

[0028] In this embodiment, Figure 4 As shown, the stopper 43 is provided with a U-shaped notch 431, into which the end of the bellows is clamped. The U-shaped notch 431 on the stopper 43 allows for precise positioning of the bellows in both the horizontal and vertical dimensions, maintaining a fixed position during testing and preventing axial or radial displacement or shaking. The operator simply aligns and inserts the end of the bellows into the U-shaped notch 431 to complete initial positioning, eliminating the need for complex alignment or additional fixing devices, making the operation simple and quick.

[0029] In this embodiment, Figure 2The lifting assembly 3 shown includes a strut 31, one end of which is mounted on the frame 1 and the other end is connected to a cross plate 32. The strut 31 is arranged vertically, and the cross plate 32 is arranged horizontally. The cross plate 32 can rotate horizontally about the strut 31. A second cylinder 33 is mounted on the end of the cross plate 32 away from the strut 31. A telescopic rod 34 is provided at the output end of the second cylinder 33 and is connected to the platform 41 for driving the platform 41 to move up and down. The horizontal rotation of the cross plate 32 about the strut 31 gives the sealing assembly 4 a certain degree of angular adjustment flexibility.

[0030] In this embodiment, Figure 5 The platform 41 is shown with an L-shaped connecting piece 411 mounted on its side. The telescopic rod 34 is adjustably threadedly connected to the L-shaped connecting piece 411 via a threaded hole provided in the L-shaped connecting piece 411. The threaded hole in the L-shaped connecting piece 411 establishes an adjustable threaded connection between the telescopic rod 34 and the platform 41. This screwing operation allows for flexible adjustment of the relative position of the telescopic rod 34 and the platform 41, enabling precise fine-tuning of the initial height and lifting range of the platform 41.

[0031] In this embodiment, the detection liquid 21 is water. When the sealed bellows is immersed in it, it can completely cover the outer surface of the bellows. When the bellows is under pressure, if there is a leak point, the gas will escape and form easily observable bubbles in the water, thereby achieving a visual display of the leakage and completing the detection function.

[0032] In this embodiment, Figure 3 The elastic plug 4224 is shown as a frustum of cones. Its unique shape and structure give it excellent adaptability. When connected to the bellows port and the air outlet 4223, the smaller end can be more easily inserted into the corresponding interface. As the insertion depth increases, the sidewall of the elastic plug 4224 gradually conforms more closely to the contact surface due to its own elasticity. The degree of fit can be automatically adjusted based on the subtle dimensional differences between different bellows ports and the specific specifications of the air outlet 4223, achieving a good sealing effect and effectively preventing gas leakage.

[0033] The above embodiments are illustrative and intended to illustrate the technical concepts and features of the present invention so that those skilled in the art can understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bellows pressure leakage detection tool, characterized by: include: A frame (1) is provided, wherein a solution tank (2) is embedded in the frame (1), wherein the solution tank (2) is filled with a detection liquid (21); a lifting component (3) and a sealing component (4); wherein the lifting component (3) is provided on the frame (1); and the sealing component (4) is connected to the lifting component (3) and is used for sealing a bellows and injecting air into the bellows; and wherein the lifting component (3) is used for driving the sealing component (4) to immerse in the detection liquid (21) and to leave.

2. The bellows pressure leakage detection tool according to claim 1, characterized in that: The sealing assembly (4) includes a long strip carrier (41), a pair of pressure sealing assemblies (42), a pair of limit seats (43), and a pair of adjustment plates (44). The adjustment plates (44) are mounted on both ends of the carrier (41) by screws. The pressure sealing assembly (42), the limit seats (43) and the adjustment plates (44) correspond to each other. The pressure sealing assembly (42) and the limit seats (43) are mounted on the adjustment plates (44) facing each other. The two ends of the bellows are respectively clamped on the corresponding limit seats (43). The lifting assembly (3) is used to drive the carrier (41) to move up and down. The pressure sealing assembly (42) is used to press and seal the bellows and pressurize the bellows with gas.

3. The bellows pressure leakage detection tool according to claim 2, characterized in that: The compression sealing assembly (42) comprises a first cylinder (421), the output end of the first cylinder (421) is provided with a connecting assembly (422), the connecting assembly (422) is connected to the end of the bellows, and gas is injected into the bellows through the connecting assembly (422).

4. The bellows pressure leakage detection tool according to claim 3, characterized in that: The connection assembly (422) comprises: a gas injection connector (4221), the gas injection connector (4221) being cylindrical, having a gas injection port (4222) provided on the radial side, and a raised gas outlet (4223) provided axially, the gas outlet (4223) being sleeved with an elastic plug (4224).

5. The bellows pressure leakage detection tool according to claim 2, characterized in that: The limiting seat (43) is provided with a U-shaped notch (431), and the end of the bellows is clamped in the U-shaped notch (431).

6. The bellows pressure leakage detection tool according to claim 2, characterized in that: The lifting assembly (3) includes a support rod (31), one end of the support rod (31) is mounted on the frame (1), and the other end is connected to a cross plate (32), the support rod (31) is vertically arranged, and the cross plate (32) is horizontally arranged, and the cross plate (32) rotates horizontally with the support rod (31) as an axis, and a second cylinder (33) is mounted on the end of the cross plate (32) away from the support rod (31), and a telescopic rod (34) is provided on the output end of the second cylinder (33) and is connected to the carrier (41) for driving the carrier (41) to move up and down.

7. The bellows pressure leakage detection tool according to claim 6, characterized in that: An L-shaped connecting piece (411) is mounted on the side of the carrier (41), and the telescopic rod (34) is adjustably threadedly connected to the L-shaped connecting piece (411) via a threaded hole provided on the L-shaped connecting piece (411).

8. The bellows pressure leakage detection tool according to claim 1, characterized in that: The detection liquid (21) is water.

9. The bellows pressure leakage detection tool according to claim 4, characterized in that: The elastic plug (4224) is in the shape of a truncated cone.

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