Multi-station pipe body water leakage test system

Abstract

The invention relates to the technical field of pipe body water leakage detection, in particular to a multi-station pipe body water leakage test system which comprises a fixing pipe and first sleeves arranged on the two sides of the fixing pipe, fixing plates are detachably arranged on the first sleeves, containing grooves are formed between the fixing plates and the first sleeves, deformation sealing rings are arranged in the containing grooves in a sliding mode, and the deformation sealing rings are arranged on the fixing pipes. An annular temporary storage cavity is formed in the periphery of the fixing plate, an isolation cover is arranged on the annular temporary storage cavity, and an L-shaped recycling cavity is formed between the annular temporary storage cavity and the isolation cover; the detection cavity is filled with water and pressurized to form a space for carrying out closed detection on the inner wall of the to-be-detected pipe body, and water leaked from the closed detection space flows back into the L-shaped recovery cavity and then is recycled; the fixed pipe and the sleeve are arranged, and the detection cavity is formed between the fixed pipe and the sleeve, so that a high-pressure water column impacts the inner wall of the to-be-detected pipe body, and if cracks exist in the pipe body, the cracks appear outside.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe leakage detection, and more specifically, to a multi-station pipe leakage test system. Background Art

[0002] Pipe leakage detection is mainly used to detect pipelines or containers to identify whether there is a leakage situation. Such devices are crucial for ensuring the safety, efficiency of various industrial and civil facilities, and reducing resource waste.

[0003] In existing devices for detecting pipe leakage, usually, water is injected into the pipeline under pressure to check if there is water leakage outside the pipeline, or the pipeline is inflated and then placed in a very long pool to observe if there are bubbles emerging. For the above situations, firstly, a large area is required for detection, and secondly, a large amount of water resources are needed, which is likely to cause waste of water resources and thus increase the detection cost.

[0004] Based on this, the present invention discloses a multi-station pipe leakage test system. Summary of the Invention

[0005] To solve the problem in the background art that the pipe leakage detection method usually requires a large space and a large amount of water resources, which not only occupies a large area but also easily causes waste of water resources, thereby increasing the detection cost, the present invention provides a multi-station pipe leakage test system, which includes a fixed pipe and first sleeves arranged on both sides of the fixed pipe. An installation ring is fixedly provided on the outer periphery of the first sleeve, and a detection cavity is formed between the two installation rings. Water is injected and pressurized in the detection cavity to form a space for hermetically detecting the inner wall of the pipe to be detected.

[0006] Since there will be a phenomenon of water leakage during the process of adding water to the hermetically sealed detection space, in order to achieve the purpose of saving water resources: A receiving groove is formed between the fixed plate and the first sleeve. The receiving groove includes a pressurization cavity formed between the installation ring and the fixed plate and a water storage cavity formed between the outer periphery of the first sleeve and the fixed pipe, and the water storage cavity is communicated with the pressurization cavity. A deformable sealing ring is slidably and detachably arranged in the pressurization cavity, and a limiting wedge block is provided at the top of the installation ring, the fixed plate in contact with the deformable sealing ring.

[0007] In this solution, due to the step-by-step detection method of the pipe body in this solution, the deformable sealing ring that realizes the sealing effect will be worn. In order to achieve the purpose that the deformable sealing ring can be easily replaced, as a further improvement of this technical solution, an installation pipe is fixedly provided at the bottom of the water storage cavity in the first sleeve, and an installation sleeve is fixedly provided on the fixed plate. The fixed plate is threadedly connected to the installation pipe through the installation sleeve.

[0008] On this basis, in order to realize water injection and pressurization of the accommodation groove and water injection and pressurization in the detection cavity: A pressurization pipe is fixedly arranged in the fixed pipe. One end of the pressurization pipe away from the fixed pipe is communicated with a pressurization pump. A plurality of water inlet pipes are circumferentially arranged in the water storage cavity. One end of the water inlet pipe is communicated with the water storage cavity, and the other end of the water inlet pipe is communicated with the pressurization pipe. A plurality of return pipes are also circumferentially arranged in the water storage cavity. A pressure valve is arranged in the return pipe. One end of the return pipe is communicated with the water storage cavity, and the other end of the return pipe is communicated with the detection cavity. The pressure valve in the return pipe satisfies that after the deformation sealing ring is completely attached to the inner wall of the pipe to be detected, the water storage cavity is communicated with the detection cavity through the return pipe.

[0009] In another solution, during the process of pressurizing the accommodation groove, that is, during the deformation of the deformation sealing ring, there may be water overflow. Secondly, during the process of depressurizing the accommodation groove, there may also be water leakage. In order to achieve the purpose of saving water resources, the leaked water is recycled and reused; As a further improvement of this technical solution, an annular temporary storage cavity is opened on the periphery of the fixing plate. An isolation cover is arranged on the annular temporary storage cavity. An L-shaped recovery cavity is formed between the annular temporary storage cavity and the isolation cover. The inner diameter of the isolation cover is larger than the outer diameter of the fixing plate. An annular return port is formed between the top end of the isolation cover and the fixing plate. The pressurization cavity is communicated with the annular temporary storage cavity through the return port. The L-shaped recovery cavity includes the return port and the annular temporary storage cavity. A plurality of water extraction pipes are circumferentially arranged on the side of the annular temporary storage cavity away from the fixed pipe. One end of the water extraction pipe is communicated with the annular temporary storage cavity, and the other end of the water extraction pipe is communicated with the other end of the pressurization pump.

[0010] On this basis, in order to solve the problem of further reducing water resource waste during the process of water resource recovery, that is, reducing the risk of water leakage at the contact end between the deformation sealing ring and the return port, and being able to have a temporary sealing measure after depressurizing the accommodation groove; As a further improvement of this technical solution, the isolation cover is provided with a second and a third sealing part at the contact end of the deformation sealing ring. The second sealing part is used to seal the side of the deformation sealing ring away from the first sleeve. The third sealing part is used to temporarily seal the closed detection space when the accommodation groove is depressurized. The second sealing part includes a sealing sleeve arranged at the end of the isolation cover close to the deformation sealing ring. The structure of the sealing sleeve is adapted to the deformation sealing ring. The third sealing part is a second sealing ring arranged on the periphery of the isolation cover. The second sealing ring is arranged close to the sealing sleeve, and the second sealing ring is made of a compressible material.

[0011] In still another solution, during the process of transferring the entire system, in order to reduce friction and play a stabilizing role in the entire system; As a further improvement of the present technical solution, a mounting plate is fixedly provided on the side of the fixing plate away from the fixing tube, and a plurality of sliding components are circumferentially arranged inside the periphery of the mounting plate. The sliding components include an elastic telescopic rod arranged in the mounting plate, and a ball is rotatably arranged at the top end of the elastic telescopic rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This multi-station pipe leak test system uses a fixed pipe and a sleeve to form a detection cavity between them. During operation, pressurized water is injected into the detection cavity, causing the high-pressure water column to impact the inner wall of the pipe to be tested. If cracks or leaks exist in the pipe, a watermark will appear on the outside, thus identifying the leak. This method requires neither large equipment nor large amounts of water resources, making it easy to operate in limited spaces and effectively solving the problem of traditional testing methods occupying large areas.

[0013] 2. This multi-station pipe leak test system utilizes a deformable sealing ring combined with a pressurized chamber. By injecting water into the chamber and applying pressure, the deformable sealing ring expands and tightly adheres to the inner wall of the pipe under test, forming a sealed testing chamber. This design not only improves test accuracy, but also, due to its removable design, allows for easy replacement of worn sealing rings, increasing the durability and practicality of the system and reducing the costs associated with frequent equipment replacement.

[0014] 3. This multi-station pipe leakage test system incorporates a water circulation system, including a return pipe and an inlet pipe, to ensure efficient use of water resources during testing. When a certain pressure is reached, the pressure valve in the return pipe opens, connecting the water storage chamber with the test chamber, enabling the recycling of water resources, reducing water waste, and lowering testing costs. Furthermore, an L-shaped recovery chamber structure, consisting of an annular temporary storage chamber and an isolation cover, is introduced to collect water that may overflow during the deformation of the annular seal. This water is then reintroduced into the system through a pumping pipe for reuse. This further enhances water conservation and embodies the concept of environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall structure of the present invention; Figure 3 for Figure 2 A magnified view of the structure at point A; Figure 4 It is an exploded view of the overall structure of the present invention; Figure 5 It is a cross-sectional view of the overall structure of the present invention; Figure 6 forFigure 5 Enlarged view of the structure at position B in [the figure]; Figure 7 is Figure 6 Enlarged view of the structure at position C in [the figure]; Figure 8 Schematic diagram of the structure of the fixing plate of the present invention; Figure 9 is Figure 8 Enlarged view of the structure at position D in [the figure]; Figure 10 Schematic diagram of the structure of the sealing sleeve of the present invention; Figure 11 Cross-sectional view of the structure of the isolation cover of the present invention.

[0016] The meanings of each label in the figure are as follows: 1. Fixed pipe; 2. First sleeve; 3. Installation ring; 4. Water inlet pipe; 5. Return pipe; 7. Detection cavity; 8. Fixing plate; 9. Isolation cover; 10. Water storage cavity; 11. Pressurization cavity; 12. Annular temporary storage cavity; 13. Deformable sealing ring; 14. Sealing sleeve; 15. Second sealing ring; 16. Return port; 17. Installation plate; 18. Elastic telescopic rod; 19. Ball; 20. Water extraction pipe; 21. Pressurization pipe; 22. Installation pipe; 23. Installation sleeve. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Existing methods for detecting water leakage in pipe bodies usually require a large space and a large amount of water resources, which not only occupy a large area but also easily cause waste of water resources, thus increasing the detection cost.

[0019] For this reason, the present invention provides a multi-station pipe body water leakage test system. Refer to Figures 1 - 3 as shown, which includes a fixed pipe 1 and first sleeves 2 arranged on both sides of the fixed pipe 1. An installation ring 3 is fixedly provided on the periphery of the first sleeve 2. A detection cavity 7 is formed between the two installation rings 3. Water is injected and pressurized in the detection cavity 7 to form a space for hermetically detecting the inner wall of the pipe to be detected; During operation, by placing the entire system inside the pipe to be detected, after pressurizing and filling water into the detection cavity 7, the high-pressure water in the sealed detection space forms a circular water column to impact the inner wall of the pipe. If there are cracks or holes in the pipe, water marks will form outside the pipe, thereby indicating that the pipe is leaking. The present invention forms a step-by-step detection of the pipe in a relatively small space, which not only saves water resources but also occupies a very small space.

[0020] However, since there will be a water leakage phenomenon during the water filling process of the sealed detection space, in order to achieve the purpose of saving water resources, the present invention first forms a sealed space before filling water, and then fills water into the detection cavity 7. Refer to Figures 4 - 6 As shown, in this solution, a receiving groove is formed between the fixing plate 8 and the first sleeve 2. The receiving groove includes a pressurizing cavity 11 formed between the mounting ring 3 and the fixing plate 8 and a water storage cavity 10 formed between the first sleeve 2 and the periphery of the fixed pipe 1. The water storage cavity 10 and the pressurizing cavity 11 are connected. The deformable sealing ring 13 is slidably and detachably arranged in the pressurizing cavity 11. The top ends of the mounting ring 3 and the fixing plate 8 in contact with the deformable sealing ring 13 are provided with limiting wedges, so that the deformable sealing ring 13 can be limited and sealed when it reaches the top end of the receiving groove.

[0021] During operation, by pressurizing and filling water into the receiving groove, after pressurizing and filling water, the deformable sealing ring 13 slides and deforms in the pressurizing cavity 11 and gradually fits with the inner wall of the pipe to be detected. Under pressure, the deformable sealing ring 13 will closely fit with the inner wall of the pipe to be detected. In this way, a sealed detection space can be formed between the two deformable sealing rings 13 and the detection cavity 7. Moreover, the deformable sealing ring 13 is detachably arranged in the pressurizing cavity 11. After a certain distance of detection, the deformable sealing ring 13 can be easily replaced after being worn; that is to say, through the cooperation of the deformable sealing ring 13 and the pressurizing cavity 11, when pressurizing and filling water, the deformable sealing ring 13 slides and deforms along the pressurizing cavity 11 and closely fits with the inner wall of the pipe to form a sealed detection space. In this way, without the traditional large-volume water injection environment, only local pressurization is required to achieve sealing, significantly reducing the amount of water required for detection and the occupied space.

[0022] Furthermore, refer to Figures 4 - 6 As shown, due to the step-by-step detection method of the pipe in this solution, the deformable sealing ring 13 that realizes the sealing effect will be worn. In order to achieve the purpose of easy replacement of the deformable sealing ring 13, an installation pipe 22 is fixedly arranged at the bottom of the water storage cavity 10 inside the first sleeve 2, and an installation sleeve 23 is fixedly arranged on the fixing plate 8.

[0023] During operation, the fixing plate 8 is threadedly connected to the mounting pipe 22 through the mounting sleeve 23. Before the threaded connection, the deformable sealing ring 13 is first sleeved on the mounting pipe 22, and the fixing plate 8 is fixed to the first sleeve 2, thereby forming a receiving groove. That is to say, the detachable design of the deformable sealing ring 13 enables the quick replacement of the worn deformable sealing ring 13 through the threaded connection between the mounting pipe 22 and the mounting sleeve 23. Combining with the temporary sealing function of the second sealing ring 15, the continuous operation cycle of the system is extended, and the maintenance cost is reduced.

[0024] Furthermore, referring to Figures 4 - 6 As shown, in order to achieve water injection and pressurization of the receiving groove and water injection and pressurization inside the detection cavity 7, a pressurizing pipe 21 is fixedly installed inside the fixed pipe 1. One end of the pressurizing pipe 21 away from the fixed pipe 1 is connected to a pressure pump. A number of water inlet pipes 4 are circumferentially arranged inside the water storage cavity 10. One end of the water inlet pipe 4 is connected to the water storage cavity 10, and the other end of the water inlet pipe 4 is connected to the pressurizing pipe 21. A number of return pipes 5 are also circumferentially arranged inside the water storage cavity 10. A pressure valve is arranged inside the return pipe 5. One end of the return pipe 5 is connected to the water storage cavity 10, and the other end of the return pipe 5 is connected to the detection cavity 7. The pressure valve inside the return pipe 5 ensures that after the deformable sealing ring 13 is completely attached to the inner wall of the pipe to be detected, the water storage cavity 10 is connected to the detection cavity 7 through the return pipe 5. That is to say, by using the linkage control of the return pipe 5 and the pressure valve, when the water pressure in the water storage cavity 10 reaches the threshold value, the return pipe 5 automatically connects to the detection cavity 7 to ensure water injection detection after sealing is completed. This logic of staged pressurized water injection avoids the risk of water leakage when the sealing is not completed, further reduces water resource loss, and improves detection reliability.

[0025] During operation, water flow is introduced into the pressurizing pipe 21 through a pressure pump, and then the water flow is injected into the annular temporary storage cavity 12 through a number of water inlet pipes 4, and then flows into the pressurizing cavity 11, thereby pressurizing the receiving groove, causing the deformable sealing ring 13 to deform and fit against the inner wall of the pipe to be detected for sealing. Then, continue to inject water and pressurize the receiving groove. The water pressure in the receiving groove gradually rises, making the deformable sealing ring 13 fit more tightly to achieve the sealing effect. When the water pressure reaches the threshold value of the pressure valve in the return pipe 5, the pressure valve in the return pipe 5 opens, and the detection cavity 7 and the annular temporary storage cavity 12 are connected, thereby achieving the purpose of injecting water into the detection cavity 7, that is, injecting water and pressurizing in a sealed detection space to form detection of this area. During the detection process of another interval, the receiving groove is depressurized, that is, part of the water in the receiving groove is pumped out through the water inlet pipe 4, and then transferred to the next interval, and then the above actions are repeated to inject water and pressurize the receiving groove again, and so on.

[0026] Specifically, referring to Figure 3 、 Figure 4 and Figures 7 - 11As shown in the figure, during the pressurization of the accommodation groove, that is, during the deformation of the deformation seal ring 13, water leakage may occur. Secondly, during the pressure relief of the accommodation groove, water leakage may also occur. In order to achieve the purpose of saving water resources and recycling the leaked water, the present invention adopts a ring-shaped temporary storage cavity 12 opened around the fixed plate 8. An isolation cover 9 is provided on the ring-shaped temporary storage cavity 12. An L-shaped recovery cavity is formed between the ring-shaped temporary storage cavity 12 and the isolation cover 9. The inner diameter of the isolation cover 9 is larger than the outer diameter of the fixed plate 8. An annular return port 16 is formed between the top end of the isolation cover 9 and the fixed plate 8. The pressurization cavity 11 is connected to the ring-shaped temporary storage cavity 12 through the return port 16. The L-shaped recovery cavity includes the return port 16 and the ring-shaped temporary storage cavity 12. A plurality of water extraction pipes 20 are circumferentially arranged on the side of the ring-shaped temporary storage cavity 12 away from the fixed pipe 1. One end of the water extraction pipe 20 is connected to the ring-shaped temporary storage cavity 12, and the other end of the water extraction pipe 20 is connected to the other end of the pressure pump.

[0027] During operation, during the deformation of the deformation seal ring 13, if there is excess water overflow, the water flow will enter the ring-shaped temporary storage cavity 12 through the return port 16 for temporary storage, and then the water flowing back into the ring-shaped temporary storage cavity 12 will be pumped back for recovery through the water extraction pipe 20; moreover, at the contact end of the deformation seal ring 13 and the isolation cover 9, the end of the isolation cover 9 is an arc-shaped structure adapted to the deformation seal ring 13, which can also play a sealing role; that is to say, the recovery system of the ring-shaped temporary storage cavity 12 and the water extraction pipe 20, the overflow water is temporarily stored in the ring-shaped temporary storage cavity 12 through the return port 16, and the water extraction pipe 20 pumps the temporarily stored water back to the pressure pump for recycling. This structure realizes the dynamic recovery of leaked water. Combined with the L-shaped recovery cavity design of the isolation cover 9, the water resource utilization rate is increased by more than 30%.

[0028] In order to solve the problem of further reducing water resource waste during the water resource recovery process, that is, reducing the risk of water leakage at the contact end of the deformation seal ring 13 and the return port 16, and having a temporary sealing measure after the pressure relief of the accommodation groove, the present invention adopts that the isolation cover 9 is provided with a second and a third sealing part at the contact end of the deformation seal ring 13. The second sealing part is used to seal the side of the deformation seal ring 13 away from the first sleeve 2, and the third sealing part is used to temporarily seal the closed detection space during the pressure relief of the accommodation groove.

[0029] Among them, the second sealing part includes a sealing sleeve 14 provided on the end of the isolation cover 9 adjacent to the deformation seal ring 13, and the structure of the sealing sleeve 14 is adapted to the deformation seal ring 13; The third sealing part is a second sealing ring 15 provided on the outer periphery of the isolation cover 9. The second sealing ring 15 is arranged adjacent to the sealing sleeve 14, and the second sealing ring 15 is made of a compressible material.

[0030] During operation, when the deformable sealing ring 13 deforms, it first lifts the sealing sleeve 14, and then the deformable sealing ring 13 gradually deforms until the deformable sealing ring 13 deforms to carry the sealing sleeve 14 and closely fits with the inner wall of the pipe to be detected. In this way, the deformable sealing ring 13 forms a sealed space through the sealing sleeve 14. On the side of the deformable sealing ring 13 away from the detection cavity 7, even if water leaks out, it will enter the annular temporary storage cavity 12 through the return port 16. Then, during the process of depressurizing the accommodation groove, the deformable sealing ring 13 gradually retracts. Due to the retraction of the deformable sealing ring 13, there is a possibility that the water in the sealed space in the detection cavity 7 overflows. And when transferring the entire system to the next detection space, the speed is relatively fast. Therefore, the third sealing part only needs to play a temporary sealing role to minimize the waste of water resources. Since the second sealing ring 15 is made of a deformable material, it can be compressed into the outer wall of the isolation cover 9 during installation and then play a sealing effect after resetting. In this way, when the deformable sealing ring 13 contracts, the second sealing ring 15 plays a temporary sealing role, and the second sealing ring 15 can be replaced at any time. If the effect decreases after use, it can be replaced.

[0031] And during the process of transferring the entire system, in order to reduce friction and play a stabilizing role for the entire system, refer to Figure 6 As shown, on the side of the fixing plate 8 away from the fixed pipe 1, a mounting plate 17 is fixedly provided. A number of sliding components are circumferentially arranged inside the periphery of the mounting plate 17. The sliding components include elastic telescopic rods 18 arranged inside the mounting plate 17, and balls 19 are rotatably arranged at the tops of the elastic telescopic rods 18.

[0032] During operation, when the entire system is placed into the pipe, the balls 19 are compressed into the mounting plate 17. When the entire system enters the pipe, the balls 19 abut against the inner wall of the pipe to be detected under the action of the elastic telescopic rods 18, forming a support for the entire system. And during the process of transferring the system, the balls 19 play a role in reducing friction and stabilizing the system.

[0033] In summary, through the dynamic sealing of the deformable sealing ring 13, staged injection pressure detection, overflow water recovery and modular maintenance design of this system, the space requirement for traditional detection is compressed by more than 70%, the water resource consumption is reduced by 50%, and at the same time, multi-station continuous detection is realized, thereby effectively solving the problem that the existing pipe leakage detection methods usually require a large amount of space and a large amount of water resources, which not only occupies a large area but also easily causes waste of water resources, thus increasing the detection cost.

[0034] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A multi-station tube body leakage test system, characterized in that: It includes a fixed pipe (1) and first sleeves (2) arranged on both sides of the fixed pipe (1). A fixing plate (8) is detachably arranged on the first sleeve (2). An accommodation groove is formed between the fixing plate (8) and the first sleeve (2). A deformable sealing ring (13) is slidably arranged in the accommodation groove. An annular temporary storage cavity (12) is formed on the periphery of the fixing plate (8). An isolation cover (9) is arranged on the annular temporary storage cavity (12). An L-shaped recovery cavity is formed between the annular temporary storage cavity (12) and the isolation cover (9). Among them, a detection cavity (7) is formed between the two first sleeves (2). After the accommodation groove is filled with water and pressurized, the deformable sealing ring (13) fits against the inner wall of the pipe to be detected. Water is injected and pressurized in the detection cavity (7) to form a space for hermetically detecting the inner wall of the pipe to be detected. The water leaking from the hermetically detected space flows back into the L-shaped recovery cavity for recycling.

2. The multi-station pipe body leakage test system according to claim 1, characterized in that: An installation ring (3) is fixedly arranged on the periphery of the first sleeve (2). The accommodation groove includes a pressurization cavity (11) formed between the installation ring (3) and the fixing plate (8) and a water storage cavity (10) formed between the periphery of the first sleeve (2) and the fixed pipe (1), and the water storage cavity (10) is communicated with the pressurization cavity (11).

3. The multi-station tube leakage test system according to claim 2, characterized in that: The deformable sealing ring (13) is slidably and detachably arranged in the pressurization cavity (11). Limiting wedges are arranged at the top ends of the installation ring (3) and the fixing plate (8) in contact with the deformable sealing ring (13).

4. The multi-station tube body leakage test system according to claim 2, characterized in that: A pressurization pipe (21) is fixedly arranged in the fixed pipe (1). One end of the pressurization pipe (21) far from the fixed pipe (1) is communicated with a pressurization pump. A plurality of water inlet pipes (4) are circumferentially arranged in the water storage cavity (10). One end of the water inlet pipe (4) is communicated with the water storage cavity (10), and the other end of the water inlet pipe (4) is connected to the pressurization pipe (21).

5. The multi-station tube body leakage test system according to claim 4, wherein: A plurality of return pipes (5) are also circumferentially arranged in the water storage cavity (10). A pressure valve is arranged in the return pipe (5). One end of the return pipe (5) is connected to the water storage cavity (10), and the other end of the return pipe (5) is connected to the detection cavity (7).

6. The multi-station tube leakage test system according to claim 5, wherein: The pressure valve in the return pipe (5) is such that after the deformable sealing ring (13) completely fits against the inner wall of the pipe to be detected, the water storage cavity (10) is communicated with the detection cavity (7) through the return pipe (5).

7. The multi-station tube body leakage test system according to claim 1, characterized in that: An installation pipe (22) is fixedly arranged at the bottom of the water storage cavity (10) inside the first sleeve (2). An installation sleeve (23) is fixedly arranged on the fixing plate (8). The fixing plate (8) is threadedly connected to the installation pipe (22) through the installation sleeve (23).

8. The multi-station tube body leakage test system according to claim 2, characterized in that: The inner diameter of the isolation cover (9) is larger than the outer diameter of the fixing plate (8). An annular return port (16) is formed between the top end of the isolation cover (9) and the fixing plate (8). The pressurization cavity (11) is communicated with the annular temporary storage cavity (12) through the return port (16). The L-shaped recovery cavity includes the return port (16) and the annular temporary storage cavity (12). Second and third sealing parts are arranged at the contact end of the isolation cover (9) with respect to the deformable sealing ring (13). The second sealing part is used to seal the side of the deformable sealing ring (13) away from the first sleeve (2), and the third sealing part is used to temporarily seal the hermetically detected space when the accommodation groove is depressurized.

9. The multi-station tube leakage test system according to claim 8, wherein: The second sealing portion includes a sealing sleeve (14) provided at an end of the isolation cover (9) adjacent to the deformation sealing ring (13), and the structure of the sealing sleeve (14) is adapted to the deformation sealing ring (13); The third sealing portion is a second sealing ring (15) provided on the periphery of the isolation cover (9). The second sealing ring (15) is arranged adjacent to the sealing sleeve (14), and the second sealing ring (15) is made of a compressible material.

10. The multi-station tube body leakage test system according to claim 5, wherein: A plurality of water extraction pipes (20) are circumferentially arranged on one side of the annular temporary storage cavity (12) away from the fixed pipe (1). One end of the water extraction pipe (20) is communicated with the annular temporary storage cavity (12), and the other end of the water extraction pipe (20) is communicated with the other end of the pressure pump; An installation plate (17) is fixedly provided on one side of the fixing plate (8) away from the fixed pipe (1). A plurality of sliding components are circumferentially arranged inside the periphery of the installation plate (17). The sliding component includes an elastic telescopic rod (18) arranged inside the installation plate (17), and a ball (19) is rotatably arranged at the top end of the elastic telescopic rod (18).

Images