Pipeline air tightness detection tool clamp and detection method

Abstract

The invention discloses a pipeline air tightness detection tool clamp and a detection method, and aims to provide the pipeline air tightness detection tool clamp and the detection method which can improve the assembly stability and efficiency, improve the device applicability and improve the accuracy of a detection result. The device comprises an operation table; the pipeline fixing assembly is movably connected with the operation table, and the pipeline fixing assembly is provided with an operation ring I and a plurality of limiting rods; the pipeline sealing assembly is movably connected with the operation table, and the pipeline sealing assembly is provided with an operation ring II and a sealing conical head; the air sound pickup assembly is movably connected with the operation table, the air sound pickup assembly is provided with an arc-shaped butt clamp and a plurality of sound pickup supporting rods, and the sound pickup supporting rods are connected with sound pickups; and the water collecting plate is movably connected with the operation table. The device has the beneficial effects that the high adaptability of the detection device to the pipeline is realized; the device practicability is improved; the sealing performance of pipeline installation is guaranteed; and the accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline production and inspection, and particularly to a pipeline airtightness detection tooling fixture and a detection method. Background Art

[0002] There are three categories of pipelines. The first category is metal pipes, the second category is plastic-coated metal pipes, and the third category is plastic pipes, such as common corrugated pipes, etc. Since it is necessary to ensure strong airtightness in the pipeline lumen after connection to prevent leakage when transporting media, it is necessary to detect the airtightness of the pipeline during production.

[0003] Chinese Patent Authorization Publication Number: CN 113188734 A, Authorization Publication Date: June 4, 2024. The present invention proposes a metal pipe airtightness detection tooling fixture and its detection method, including a base and a fixture table. One side of the inner wall of the fixture table is installed with a motor through bolts, and the end of the motor is welded with a rotating gear. Both sides of the inner wall of the fixture table are rotatably connected with rotating columns through bearings. The two sides of the outer walls of the two rotating columns are respectively welded with a main gear and a secondary gear. The top of the rotating column is connected with a rotating disk through a key and a keyway. One side of the top of the rotating disk is movably connected with a pushing member, and one end of the pushing member is movably connected with a pushing frame. Both sides of the top of the fixture table are welded with support frames, and one side of the pushing frame is movably connected to the top of the support frame. The deficiencies of this technical solution are as follows: 1. It is difficult to quickly install the pipeline on the device, and it is difficult to ensure the stability and airtightness after installation; 2. It restricts the types, specifications, and lengths of the pipelines to be detected, resulting in poor adaptability; 3. The method for detecting the airtightness of the pipeline is single, resulting in low credibility of the detection results.

[0004] In summary, the tooling fixture and method for airtightness detection have the deficiencies of low pipeline assembly efficiency, poor stability and airtightness, poor adaptability to pipeline types, and low accuracy of detection results. Summary of the Invention

[0005] The present invention is to overcome the deficiencies in the prior art that the tooling fixture and method for airtightness detection have low pipeline assembly efficiency, poor stability and airtightness, poor adaptability to pipeline types, and low accuracy of detection results, and provides a pipeline airtightness detection tooling fixture and a detection method that improve the assembly stability, airtightness, and efficiency of the pipeline, enhance the applicability of the tooling, and improve the accuracy of the detection results.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A pipeline airtightness detection tooling fixture, including An operation table; The pipe fixing component is movably connected to the operating table. The pipe fixing component is provided with an operating ring 1 and a number of limiting rods. The operating ring 1 is rotatably connected to the pipe fixing component, and the limiting rods are telescopically connected to the pipe fixing component through the operating ring 1; The pipe sealing component is placed outside the pipe fixing component. The pipe sealing component is movably connected to the operating table. The pipe sealing component is provided with an operating ring 2 and a sealing cone head. The cross-sectional shape of the sealing cone head is a conical shape with a fluctuating surface. The sealing cone head is provided with a gas-liquid channel. The operating ring 2 is rotatably connected to the pipe sealing component, and the sealing cone head is movably connected to the pipe sealing component through the operating ring 2; The air and sound pickup component is placed on the side of the operating table. The air and sound pickup component is movably connected to the operating table. The air and sound pickup component is provided with an arc-shaped clamping pair and a number of pickup support rods. The pickup support rods are connected with pickups. The arc-shaped clamping pair is rotatably connected to the air and sound pickup component, and the pickup support rods are movably connected to the arc-shaped clamping pair; The water collecting plate is placed below the pipe fixing component and the pipe sealing component. The water collecting plate is movably connected to the operating table.

[0007] The pipe fixing assembly is movably connected to the workbench for fixing the pipe head of the pipe. At the same time, its mobility is used to detect pipes of different lengths, so as to improve the applicable range of the tooling fixture. The pipe fixing assembly is provided with a structural operation ring 1 and a limiting rod. By rotating the operation ring 1 on the pipe fixing assembly, the limiting rod can perform telescopic movement, thereby realizing the locking and unlocking of the pipe head, simplifying the operation method and improving the operation efficiency. In addition, the pipe fixing assembly can be adapted to pipes of different diameter specifications to further improve the applicability to pipes. The pipe sealing assembly is movably connected to the workbench and placed outside the pipe fixing assembly for sealing the pipe orifice of the fixed pipe. The pipe sealing assembly and the pipe fixing assembly are set as a group and mirror-arranged in two groups on the workbench to install both ends of the pipe; the pipe sealing assembly performs pre-sealing on pipes of different lengths through the movement of the pipe fixing assembly before detection to ensure the high applicability of the tooling fixture. The pipe sealing assembly is provided with an operation ring 2 and a sealing cone head. By rotating the operation ring 2 on the pipe sealing assembly, the sealing cone head is pushed, so that the sealing cone head contacts and presses against the pipe orifice of the fixed pipe, realizing high-strength contact and sealing of the pipe through fine adjustment, preventing leakage during the detection of the tooling fixture; in addition, the cross-sectional shape of the sealing cone head is a conical shape with a fluctuating surface, so that the sealing cone head can perform stress-resistant sealing operations according to the circular structure characteristics of the pipe orifice. With the cooperation of the pipe fixing assembly, simple operations can achieve high-strength fixing and sealing operations, ensuring the stability and accuracy of airtightness detection, so that the sealing cone head can be externally connected to an air intake device and a liquid intake device through an air-liquid channel and can enter the pipe during sealing.The breathy voice pickup component is movably connected to the side of the operating table to detect the pipeline fixed by the tooling fixture, so that the operation is not restricted by the pipeline length to ensure the adaptability to the pipeline. Among them, the structural pickup rod is used to install the pickup, enabling the pickup to pick up and amplify sounds. The air-liquid channel of the sealing cone head continuously inflates the pipeline under sealing. The pickup can be annularly arranged around the pipeline through the arc-shaped clamp to comprehensively detect whether there are leak holes in the fully inflated pipeline that emit the sound of amplified air pressure. The pickup rod is movably connected to the arc-shaped clamp to control the distance between each pickup and the pipeline to adapt to the diameter change of the pipeline, ensuring the best pickup distance and improving the accuracy of airtightness detection. While detecting airtightness, the flaw detection position can be quickly detected. In addition, the air-liquid channel of the sealing cone head continuously evacuates the pipeline under sealing, exhausting the air inside the sealed pipeline. Then, it is difficult to reach a vacuum state in the presence of air holes, resulting in continuous gas extraction, achieving a quick detection of the airtightness qualification of the pipeline. The water collecting plate is connected to the operating table. When the pipeline is continuously filled with liquid through the air-liquid channel of the sealing cone head under sealing, if there are leakage holes in the pipeline causing water leakage, the flaw detection position can be quickly detected while detecting airtightness. The water collecting plate collects the leaked water, ensuring the cleanliness of the tooling fixture, facilitating the quick start of the next detection, and preventing the shortening of the service life of the tooling fixture. In addition, the arc-shaped clamp is rotatably connected to the pickup component and can be flexibly installed and disassembled on the pipeline, thus not affecting the process of water pressure detection. It achieves the effects of enabling the tooling fixture to highly adapt to pipelines of different specifications, improving the practicality of the tooling fixture, ensuring the sealing and stability of pipeline installation, enhancing the stability of airtightness detection and the accuracy of results, being convenient to operate, realizing diversified airtightness detection and quick and high-precision flaw detection, having a clean and efficient detection process, extending the service life of the device, and facilitating batch detection.

[0008] Preferably, both the pipeline fixing assembly and the pipeline sealing assembly are connected with moving sliders. The operating table is connected with linear guide rods and linear guide rails. The lower end of the moving slider is provided with a guide groove adapted to the linear guide rods. The moving slider is movably connected to the linear guide rods through the guide groove. The operating table is connected with a linkage seat, the linkage seat is connected with the linear guide rail, the linkage seat is connected with a linkage rod, one end of the linkage rod is connected with the linkage seat, and the other end of the linkage rod is connected with the moving slider. Both the pipeline fixing assembly and the pipeline fixing assembly are connected to the linear guide rods on the operating table through the guide grooves of the moving sliders, so that both the pipeline fixing assembly and the pipeline fixing assembly can perform guiding and directional movement on the operating table through the moving sliders, preventing deflection during pipeline connection from causing pipeline bending and offset, and thus ensuring that the pipeline can be fully unfolded to improve the pipeline detection accuracy and stability; the operating table is connected with an electric linear driving device, the linear guide rail, to start the connected linkage seat through the linear guide rail. The linkage seat is connected with the moving slider through the linkage rod, thereby driving the pipeline fixing assembly and the pipeline sealing assembly to move synchronously. The effects of achieving adaptability to different lengths of pipelines, improving operation accuracy and automation degree are achieved.

[0009] Preferably, the pipeline fixing assembly includes a first base, a first fixing ring and a first supporting ring. One end of the first base is connected with the moving slider, the other end of the first base is connected with the first fixing ring, the first supporting ring is connected with the first fixing ring, an operating ring is rotatably connected with the first fixing ring. The surface of the first supporting ring is provided with an activity groove, the activity groove is provided with positioning holes, a limiting rod is inserted into the positioning holes, the limiting rods are arranged in a ring on the first supporting ring. The inner wall of the operating ring is connected with a top plate, the top plate is placed in the activity groove, and the limiting rod is movably connected with the first supporting ring through the top plate. The first base connects the first fixing ring to the moving slider to ensure mobility while fixing the structure. The first supporting ring is connected with the first fixing ring to keep the first supporting ring fixed. The pipeline passes through the first supporting ring and is clamped by the limiting rods extending from the positioning holes of the first supporting ring. The operating ring is sleeved outside the first supporting ring and rotates to apply force to the limiting rods through the top plate, so that the circumferentially arranged limiting rings clamp the pipeline synchronously and are applicable to pipelines of different diameters. The effects of achieving the connection stability and operation synchronization between structures and then realizing the high-strength adaptable clamping and fixing of the pipeline are achieved.

[0010] Preferably, the fixing ring 1 is provided with a connection groove, the operating ring 1 is connected with a connection ring, the operating ring 1 and the connection ring are an integrated structure, the connection ring is threadedly connected to the connection groove, the surface of the operating ring 1 is connected with an anti-skid convex strip, the fixing ring 1 is provided with a connecting slide hole, and the anti-skid convex strip extends out of the connecting slide hole. The side of the fixing ring 1 is threadedly connected with the connecting ring of the operating ring 1 through the connection groove, so that the operating ring 1 can adjust the moving distance of the limit rod and lock the limit rod with high precision, and the anti-skid convex strip is connected to the surface of the operating ring 1 to prevent slipping during the operation and thus improve the operation stability. The effect of achieving fast operation and high-precision adjustment of adaptability to different pipelines and improving the clamping strength and stability of the pipeline is achieved.

[0011] Preferably, the top plate is provided with a push inclined plane, one end face of the limit rod is in contact with the push inclined plane, the other end of the limit rod is connected with an anti-slip pad, the limit rod is connected with a limit ring, the limit ring is connected with a reset spring, the reset spring is sleeved with the limit rod, and the reset spring is connected with the bottom of the movable groove. The contact surface of the top plate and the limit rod is a slope with the same slope to apply force, thereby protecting the structure from collision of hard connection, the limit rod is sleeved with the reset spring so that the limit rod can automatically reset after losing the force of the push plate, and the limit ring limits the position of the reset spring to prevent the reset spring from falling out. The effect of extending the adaptability life of the structure, improving the convenience of loading and unloading the pipeline, and being suitable for batch detection of air tightness is achieved.

[0012] Preferably, the pipeline sealing assembly includes a base 2, a fixed ring 2 and a support ring 2, one end of the base 2 is connected to the movable slide, the other end of the base 2 is connected to the fixed ring 2, the sealing cone head is sleeved with a fixed shell, one end of the inner cavity of the fixed shell is connected to the sealing cone head, the other end of the inner cavity of the fixed shell is connected to a three-way connector, the fixed shell is provided with a limiting groove, the support ring 2 is connected with an insert ring, the insert ring is plugged into the limiting groove, the operating ring 2 is provided with an insert piece, the support ring 2 is provided with a slot, the insert piece is plugged into the slot, and the support ring 2 is threadedly connected to the fixed ring 2. The base 2 in the pipeline sealing assembly is connected to the movable slide to drive and fix the structure fixed ring 2. The support ring 2 is threadedly connected to the fixed ring 2 to drive the sealing cone head connected to the fixed shell inside to move forward and backward with the connection of the support ring 2, so that the sealing cone head is close to or away from the support ring 1. The support ring 1 coincides with the central symmetry axis of the sealing cone head to cooperate with entering the pipeline for sealing. The rotation direction of the operating ring 2 is perpendicular to the movement direction. The operating ring 2 is inserted into the support ring 2 through the insert and can drive the rotating support ring 2 to adjust the distance. The three-way connector is used for external gas and liquid conveying equipment (not shown in the figure). The insert ring ensures that the internally connected fixed shell, three-way connector and sealing cone head remain stable and do not rotate, so as not to hinder the connection and air tightness of water and air inlet, and can drive horizontal movement at the same time. The effect of improving the connection and operation stability between the various structures of the pipeline sealing assembly, quick operation, and improving the detection efficiency and air tightness accuracy is achieved.

[0013] Preferably, the air and sound pickup assembly includes a bracket and a lifting rod. The bracket is movably connected to the operating table. One end of the lifting rod is movably connected to the bracket, and the other end of the lifting rod is connected to a support. An arc-shaped pair of clips is connected with a rotating rod. The support is provided with a rotating hole, and the rotating rod is inserted into the rotating hole. The bracket can be on the operating table, so that the air and sound pickup assembly can move flexibly to adapt to the comprehensive detection and key flaw detection of the pipeline. The lifting rod is connected to the bracket and can move up and down to ensure that the air pressure detection and water pressure detection can be operated independently without affecting each other. The arc-shaped pair of clips rotates on the support with the rotating rod as the fulcrum to cooperate with the lifting to flexibly surround and leave the pipeline. The flexible adjustability of the air and sound pickup assembly during use is improved to adapt to the change of pipeline specifications, and the detection efficiency is improved.

[0014] Preferably, the arc-shaped pair of clips is provided with a connection hole, and the pickup rod is threadedly connected to the connection hole. The pickup rods are arranged in a ring around the arc-shaped pair of clips. One end of the pickup rod is connected with an adjustment block, and the other end of the pickup rod is connected with the pickup. The arc-shaped pair of clips threadedly connects the pickup rod through the connection hole, so that the distance between the pickup rod and the pipeline can be quickly adjusted to adapt to the change of the pipeline diameter. The adjustment block is convenient for rotation to prevent slipping during rotation. The adjustment efficiency for the change of the pipeline diameter is improved, and thus the high-efficiency detection is facilitated.

[0015] Preferably, a clamping seat is clamped on the linear guide rod. The clamping seat is threadedly connected with a pipeline support, and the pipeline support is connected with a load-bearing bent plate. The clamping seat is connected to the linear guide rod by clamping, which is convenient for installation and disassembly and does not affect the operation of the pickup. The load-bearing bent plate is further supported by the support of the pipeline support to support the pipeline during the water pressure method detection, preventing the pipeline from deforming and detaching due to its own weight and affecting the airtightness detection; the clamping seat installs the pipeline support by threaded connection, so that the height of the load-bearing bent plate connected to the pipeline support can be adjusted to adjust the distance between the load-bearing bent plate and the pipeline and adapt to the change of the pipeline diameter. The stability and accuracy of the airtightness detection are further improved, and the adaptability to the pipeline specifications is high.

[0016] A method for detecting the airtightness of a pipeline, including the pipeline to be detected, the method includes the following steps: S1: Adjust the distance between the pipeline fixing components and pipeline sealing components on one side and those on the other side to a position suitable for the length of the pipeline to be detected by starting the linear guide rail; S2: Insert the pipeline into the first support ring and rotate the first operating rod to clamp the pipeline; S3: Rotate the second operating rod to make the sealing cone head enter the pipe orifice of the pipeline and press it tightly; S4: Extract the gas in the pipeline through the three-way connector, observe the situation of the gas extracted from the pipeline to judge whether it is qualified, and remove the leaking pipeline; S5: Adjust the height of the lifting rod, clamp the pipeline with the arc-shaped pair, and adjust the position of the pickup rod to make the pickup closer to the pipeline; S6: Pass gas through the tee joint to inflate the pipeline. After sufficient gas is filled, use the moving bracket to make the pickup detect the air tightness and flaw detection of the pipeline, and remove the leaking pipeline; S7: Continue to detect the pipelines that have not been detected as leaking. Close the ventilation, move the lifting rod away, insert the linear guide rod into the card seat, and adjust the height of the pipeline support and the load-bearing bending plate to support the pipeline to keep it horizontal; S8: Move the position of the water collecting plate to adapt the position to the length arrangement of the pipeline for water collection preparation; S9: Pass liquid through the tee joint to add liquid to the pipeline. The water pressure gradually increases. Further judge the air tightness of the pipeline according to whether there is leakage, and detect flaws according to the leakage position to complete the multiple detections of the pipeline.

[0017] Measure the horizontal length by straightening the pipeline through the pipeline. By starting the linear guide rail, adjust the distance between the pipeline fixing components and pipeline sealing components on one side and those on the other side to the pipeline length, so that the tooling fixture can adapt to the detection of pipelines with different lengths. Insert the pipe head of one end of the pipeline into the first support ring, and then make each limiting rod surround the periphery of the pipe head side. At this time, rotate the first operating rod, and each limiting rod can clamp the pipe head simultaneously. Among them, the connecting ring on the first operating ring rotates threadedly in the connecting groove, so that the inclined plane of the top plate applies force to the limiting rod, causing the limiting rod to move and lock the clamping action. The anti-slip pad buffers the hard contact surface with the pipeline and improves the contact friction at the same time, and the pipe head fixing is completed. Rotate the second operating rod to screw the second support ring on the second fixing ring, so as to push the sealing cone head to press and seal the pipe orifice of the pipeline and lock the sealing position, and the pipe orifice sealing is completed. After the two groups of pipeline sealing components and pipeline fixing components respectively complete the fixing and sealing of both ends of the pipeline, evacuate the pipeline through the tee joint. Continuously evacuate the pipeline through the gas-liquid channel of the sealing cone head, so that the air inside the pipeline is pumped out. Then, it is difficult to reach the vacuum state under the premise of having air holes, resulting in continuous gas pumping, realizing the preliminary rapid detection of the pipeline airtightness qualification; adjust the position of the lifting rod on the bracket, adjust the bracket to one end of the pipeline, open and close the arc-shaped clamp, so that the arc-shaped clamp surrounds the periphery of the pipeline, rotate the pick-up rod, and make the pick-up closer to the pipeline surface. The pick-up is externally connected to an amplifying device to prepare for sound pickup. Input air into the tee joint, and then inflate the pipeline through the sealing cone head until it is fully inflated, and then the airtightness detection and flaw detection of the pipeline can be carried out: move the bracket to make the pick-up gradually detect flaws in the pipeline. The pick-up amplifies the volume of the air pressure ejected from the air holes where the pipeline leaks air, and completes the airtightness detection of the pipeline. After completing a circle of detection from one end of the pipeline to the other end, the pipeline without detected air holes enters the next step of detection. The pipeline with detected air holes is marked with the leakage position and then removed and judged unqualified. Reset and rotate the lifting rod to make the lifting rod leave the pipeline and protect the pick-up from liquid splashing. Adjust the position of the water collecting plate to make the water collecting plate adapt to the pipeline length for placement to prepare for collecting the ejected liquid. Pass the liquid through the single-pass joint to add liquid to the pipeline. As the water pressure increases, the leakage hole is exposed, and the secondary detection of the pipeline is completed. The pipeline without gas-liquid leakage in both detections is a qualified pipeline, and thus the high-precision pipeline airtightness test is realized.

[0018] The beneficial effects of the present invention are as follows: realizing the high-adaptability detection of the tooling fixture for pipelines of different specifications; improving the practicability of the device; ensuring the sealing and stability of pipeline installation; enhancing the stability of airtightness detection and the accuracy of results; convenient operation, realizing diversified airtightness detection and rapid high-precision flaw detection; the detection process is clean and efficient, and the service life of the device is extended; facilitating batch detection; improving the degree of automation; improving the convenience of pipeline loading and unloading. Description of the Drawings

[0019] Figure 1 is the perspective view of the present invention; Figure 2 is Figure 1 the enlarged view at position A in Figure 3 is Figure 1 the top view of Figure 4 is Figure 1 the side view of Figure 5 is Figure 4 the sectional view taken along B-B in Figure 6 is the sectional view of the pipeline fixing assembly; Figure 7 is Figure 6 the sectional view taken along C-C in Figure 8 is the sectional view of the pipeline sealing assembly; Figure 9 is the sectional view of the air and sound pickup assembly.

[0020] In the figure: 1. operating table, 2. first operating ring, 3. limiting rod, 4. second operating ring, 5. sealing cone head, 6. gas-liquid channel, 7. arc-shaped clamping, 8. pickup support rod, 9. pickup, 10. water collecting plate, 11. moving sliding table, 12. linear guide rod, 13. linear guide rail, 14. linkage seat, 15. linkage rod, 16. first base, 17. first fixing ring, 18. first support ring, 19. movable groove, 20. positioning hole, 21. top plate, 22. connecting groove, 23. connecting ring, 24. anti-slip convex strip, 25. communicating sliding hole, 26. pushing inclined plane, 27. anti-slip pad, 28. limiting ring, 29. return spring, 30. second base, 31. second fixing ring, 32. second support ring, 33. fixed shell, 34. three-way connector, 35. limiting groove, 36. insertion piece, 37. insertion slot, 38. bracket, 39. lifting rod, 40. support, 41. rotating rod, 42. rotating hole, 43. connecting hole, 44. adjusting block, 45. clamping seat, 46. pipeline support, 47. load-bearing bending plate, 48. insertion ring, 49. guiding sliding seat, 50. sliding groove, 51. guiding slider, 52. adjusting rotating block, 53. switch valve. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of at least one exemplary embodiment is actually only illustrative and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components set forth in these embodiments do not limit the scope of the present application. For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, processes, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, processes, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above terms have no special meaning, so it should not be construed as a limitation on the protection scope of this application. Embodiment

[0025] As Figure 1 , 2 , as shown in Figures 3 and 8, a pipeline airtightness detection tooling fixture includes an operating table 1; a pipeline fixing component, which is movably connected to the operating table 1. The pipeline fixing component is provided with an operating ring 2 and a plurality of limiting rods 3. The operating ring 2 is rotatably connected to the pipeline fixing component, and the limiting rods 3 are telescopically connected to the pipeline fixing component through the operating ring 2; a pipeline sealing component, which is placed outside the pipeline fixing component and is movably connected to the operating table 1. The pipeline sealing component is provided with an operating ring 4 and a sealing cone head 5. The cross-sectional shape of the sealing cone head 5 is a conical shape with a fluctuating surface. The sealing cone head 5 is provided with a gas-liquid channel 6. The operating ring 4 is rotatably connected to the pipeline sealing component, and the sealing cone head 5 is movably connected to the pipeline sealing component through the operating ring 4; an air and sound pickup component, which is placed on the side of the operating table and is movably connected to the operating table 1. The air and sound pickup component is provided with an arc-shaped clamping pair 7 and a plurality of pickup support rods 8. The pickup support rods 8 are connected with pickups 9. The arc-shaped clamping pair 7 is rotatably connected to the air and sound pickup component, and the pickup support rods 8 are movably connected to the arc-shaped clamping pair 7; a water collecting plate 10, which is placed below the pipeline fixing component and the pipeline sealing component, and the water collecting plate 10 is movably connected to the operating table 1.

[0026] As Figure 1 , 2 , as shown in Figure 5, both the pipeline fixing component and the pipeline sealing component are connected with a moving slide 11. The operating table 1 is connected with a linear guide rod 12 and a linear guide rail 13. The lower end of the moving slide 11 is provided with a guide groove adapted to the linear guide rod 12. The moving slide 11 is movably connected to the linear guide rod 12 through the guide groove. The operating table 1 is connected with a linkage seat 14. The linkage seat 14 is connected with the linear guide rail 13. The linkage seat 14 is connected with a linkage rod 15. One end of the linkage rod 15 is connected with the linkage seat 14, and the other end of the linkage rod 15 is connected with the moving slide 11.

[0027] As Figure 2 , 6As shown, the pipeline fixing component includes a first base 16, a first fixing ring 17 and a first support ring 18. One end of the first base 16 is connected to the moving slide 11, the other end of the first base 16 is connected to the first fixing ring 17, the first support ring 18 is connected to the first fixing ring 17, the first operating ring 2 is rotatably connected to the first fixing ring 17. The surface of the first support ring 18 is provided with a movable groove 19, the movable groove 19 is provided with a positioning hole 20, the limiting rod 3 is inserted into the positioning hole 20, and the limiting rods 3 are arranged in a ring shape on the first support ring 18. The inner wall of the first operating ring 2 is connected with a top plate 21, the top plate 21 is placed in the movable groove 19, and the limiting rod 3 is movably connected to the first support ring 18 through the top plate 21.

[0028] As Figure 6 , 7 shown, the first fixing ring 17 is provided with a connecting groove 22, the first operating ring 2 is connected with a connecting ring 23, the first operating ring 2 and the connecting ring 23 are of an integral structure, the connecting ring 23 is threadedly connected with the connecting groove 22, the surface of the first operating ring 2 is connected with anti-slip convex strips 24, the first fixing ring 17 is provided with a communicating slide hole 25, and the anti-slip convex strips 24 extend out of the communicating slide hole 25.

[0029] As Figure 6 , 7 shown, the top plate 21 is provided with a pushing inclined surface 26, one end face of the limiting rod 3 is in contact with the pushing inclined surface 26, the other end of the limiting rod 3 is connected with an anti-slip pad 27, the limiting rod 3 is connected with a limiting ring 28, the limiting ring 28 is connected with a return spring 29, the return spring 29 is sleeved on the limiting rod 3, and the return spring 29 is connected with the bottom of the movable groove 19.

[0030] As Figure 2 , 8 shown, the pipeline sealing component includes a second base 30, a second fixing ring 31 and a second support ring 32. One end of the second base 30 is connected to the moving slide 11, the other end of the second base 30 is connected to the second fixing ring 31, the sealing cone head 5 is sleeved with a fixing shell 33, one end of the inner cavity of the fixing shell 33 is connected to the sealing cone head 5, the other end of the inner cavity of the fixing shell 33 is connected with a tee joint 34, the fixing shell 33 is provided with a limiting groove 35, the second support ring 32 is connected with an inserting ring 48, the inserting ring 48 is inserted into the limiting groove 35, the second operating ring 4 is provided with inserting pieces 36, the second support ring 32 is provided with inserting slots 37, and the inserting pieces 36 are inserted into the inserting slots 37. The second support ring 32 is threadedly connected with the second fixing ring 31.

[0031] As Figure 1 , 9 shown, the air and sound pickup component includes a bracket 38 and a lifting rod 39. The bracket 38 is movably connected to the operating platform 1, one end of the lifting rod 39 is movably connected to the bracket 38, the other end of the lifting rod 39 is connected with a support 40, the arc-shaped clamp 7 is connected with a rotating rod 41, the support 40 is provided with a rotating hole 42, and the rotating rod 41 is inserted into the rotating hole 42.

[0032] As Figure 9 shown, the arc clamp 7 is provided with a connection hole 43. The pick-up rod 8 is threadedly connected to the connection hole 43. The pick-up rod 8 is arranged in a ring around the arc clamp 7. One end of the pick-up rod 8 is connected with an adjusting block 44, and the other end of the pick-up rod 8 is connected with the pick-up 9.

[0033] As Figure 1 、 3 shown in FIGS. 4, the linear guide rod 12 is clamped with a clamping seat 45. The clamping seat 45 is threadedly connected with a pipe support 46, and the pipe support 46 is connected with a load-bearing bent plate 47.

[0034] As Figure 1-9 shown: The pick-up 9 is an existing microphone structure device. The pick-up 9 is externally connected with a sound amplification device (not shown in the figure) to amplify the sound generated by the air pressure for convenient and rapid detection of flaw detection.

[0035] The tee joint 34 is an existing tee pipe structure. The tee joint 34 is installed and fixed with the fixed shell 33. The liquid is transported through the pipeline on one side to realize the liquid transportation of the water supply device and the water pumping device (not shown in the figure). The liquid is transported and extracted through the water pump device. The pipeline on the other side is provided with two independent (each installed with a switch valve to prevent mutual influence) branch pipes and is externally connected with the pipelines of the air supply device and the vacuum pumping device (not shown in the figure) through the branch pipes respectively. The water supply device, the water pumping device, the air supply device and the vacuum pumping device are all prior arts. Switch valves 53 are installed on the pipelines on both sides of the tee joint 34 for convenient transportation switching.

[0036] The sealing cone head 5 and the anti-slip pad 27 are made of rubber materials to ensure high-strength contact friction. The linear guide rail 13 is an electric linear guide rail structure, and the return spring 29 adopts a spring structure.

[0037] The operating table 1 is connected with a guiding sliding seat 49. The guiding sliding seat 49 is provided with a sliding groove 50. The bracket 38 is connected with a guiding slider 51. The guiding slider 51 is slidably connected with the sliding groove 50 so that the bracket 38 can move in a guiding manner.

[0038] The surface of the bracket 38 is provided with threads and is threadedly connected with an adjusting rotating block 52 to adjust the position by the movement of the adjusting rotating block 52 on the bracket 38, so that the pick-up 9 can receive sound more accurately.

[0039] The present invention also provides a method for detecting the airtightness of a pipeline, including the pipeline to be detected: S1: By starting the linear guide rail 13, the distance between the pipeline fixing components and the pipeline sealing components on one side and the pipeline fixing components and the pipeline sealing components on the other side is adjusted to a position suitable for the length of the pipeline to be detected; S2: Insert the pipeline into the first support ring 18, rotate the first operation ring 2 to clamp the pipeline. S3: Rotate the second operation ring 4 to make the sealing cone head 5 enter the pipe orifice of the pipeline and press it tightly. S4: Extract the pipeline gas through the three-way connector 34, observe the situation of the extracted pipeline gas to judge whether it is qualified, and remove the leaking pipeline. S5: Adjust the height of the lifting rod 39, clamp the pipeline with the arc-shaped pair clamp 7, and adjust the position of the pickup rod 8 to make the pickup closer to the pipeline. S6: Pass gas through the three-way connector 34 to inflate the pipeline. After sufficient gas is filled, move the pickup through the moving bracket 38 to detect the airtightness and flaw detection of the pipeline, and remove the leaking pipeline. S7: Continue to detect the pipelines that have not been detected as leaking. Close the ventilation, move the lifting rod 39 away, insert the linear guide rod 12 into the card seat 45 and adjust the height of the pipeline support 46, and support the pipeline with the load-bearing bent plate 47. S8: Move the position of the water collecting plate 10 to adapt the position to the length arrangement of the pipeline for water collection preparation. S9: Pass liquid through the three-way connector 34 to add liquid to the pipeline. The water pressure gradually increases. Further judge the airtightness of the pipeline according to whether there is leakage, and detect flaws according to the leakage position to complete the multiple detections of the pipeline.

[0040] Among them, the detection method in production detection is carried out according to actual needs and is not specifically limited, including the sampling method that can be adopted for the pipeline and the number of detections. This application takes the full-process detection of three detection methods as the standard detection process. According to needs, two gas detection methods and one liquid detection method or combined detection methods can also be flexibly adopted. By repeating any one of the gas and liquid detections in Step 1 and Step 9 multiple times, the efficiency and accuracy can be improved; the uniform pipe orifice of the detected pipeline is of the conventional type with a circular pipe shape, excluding the special-shaped (such as rectangular) pipe orifice type; the specific pipe orifice materials of the detected pipeline include various types, including metals and resins, etc. The target pipeline to be detected is made of a material with a force-bearing hardness rather than a soft, thin and light material that cannot bear force; the specific length of the pipeline to be detected is the natural straight length of the pipeline as the detection standard length.

[0041] Both the three-way connector 34 and the switch valve 53 are existing common three-way pipe structures and valve structures for pipelines. The internal cavity of the pipeline is connected and disconnected by twisting the switch valve 53. The connection method between the three-way connector 34 and the pipeline is a sealed connection (sealed at the connection with the water tape density and the direct welding connection according to the actual situation), so that the internal media of the pipeline and the three-way connector 34 can flow without leakage. The vacuum extraction equipment and the gas supply equipment itself transport the medium through a long-distance pipeline, so that the distance between the equipment operation point and the detected pipeline is large, reducing the influence of the operation sound source.

[0042] The specific detection operations are as follows: Measure the horizontal length of the pipeline according to the straightening of the pipeline. By starting the linear guide rail 13, adjust the distance between the pipeline fixing components and pipeline sealing components on one side and those on the other side to the pipeline length, so that the tooling fixture can adapt to the detection of pipelines with different lengths. Insert the pipe head of one end of the pipeline into the first support ring 18, and then make each limiting rod 3 surround the periphery of the pipe head side. At this time, rotate the first operating ring 2, and each limiting rod 3 can clamp the pipe head simultaneously. Among them, the connecting ring 23 on the first operating ring 2 rotates threadedly in the connecting groove 22, so that the inclined surface of the top plate 21 applies force to the limiting rod 3, making the limiting rod 3 move and lock the clamping action. The anti-slip pad buffers the hard contact surface with the pipeline and simultaneously increases the contact friction force, and the pipe head fixing is completed. Rotate the second operating ring 4 to threadedly screw the second support ring 32 on the second fixing ring 31 to push the sealing cone head 5 to tightly seal the pipe orifice of the pipeline and lock the sealing position, and the pipe orifice sealing is completed. After both groups of pipeline sealing components and pipeline fixing components are fixed and sealed, open the switch valve 53 of the vacuum pumping device connected by the branch pipe on one side of the three-way connector 34 (the switch valve 53 on the liquid side remains closed), so that the vacuum pumping device evacuates the pipeline. Continuously evacuate the pipeline through the gas-liquid channel of the sealing cone head 5, so that the air inside the pipeline is pumped out. Then, it is difficult to reach the vacuum state under the premise of having air holes (mainly for larger air holes), resulting in continuous gas pumping, to achieve the preliminary and rapid detection of the airtightness qualification of the pipeline; Adjust the position of the lifting rod 39 on the bracket 38, adjust the bracket 38 to one end of the pipeline, open and close the arc clamp 7, make the arc clamp 7 surround the pipeline periphery, rotate the pickup rod 8 to make the pickup close to the pipeline surface, and the pickup is externally connected to an amplifying device to prepare for sound pickup. Input air into the three-way connector 34, and then inflate the pipeline through the sealing cone head 5 until it is fully inflated, and then the airtightness detection and flaw detection of the pipeline can be carried out: Move the bracket 38 to make the pickup 9 perform flaw detection on the pipeline. During the repeated operation of gradually moving and flaw detection, the pickup 9 amplifies the volume of the air pressure ejected from the air holes where the pipeline leaks, and completes the airtightness detection of the pipeline. After completing a circle of detection from one end of the pipeline to the other end, the pipeline without detected air holes enters the next step of detection. The pipeline with detected air holes is marked with the leakage position and then removed and judged as unqualified.Reset and rotate the lifting rod 39 to move the lifting rod 39 away from the pipeline and protect the pickup 9 from liquid splashing. Adjust the position of the water collecting plate 10 to make the water collecting plate 10 adapt to the pipeline length for placing and prepare to collect the ejected liquid (the leaking holes directly wipe the liquid flowing down under the load-bearing bending plate 47). When the linear guide rod 12 is inserted into the card seat 45 and the height of the pipeline support 46 is adjusted by rotating the rotating bracket 46, the load-bearing bending plate 47 contacts and supports the pipeline so that the pipeline can remain horizontal to prevent bending deformation due to the self-weight of water. Open the switching valve 53 on the liquid inlet side by closing the switching valve 53 for air intake. Inject liquid into the pipeline through the three-way connector 34 by the water supply device. As the water pressure increases, the leakage holes are exposed, that is, the liquid detection of the pipeline is completed. After the detection, take out the pipeline liquid and remove the pipeline by closing the water supply device and opening the pumping device. The pipelines without leakage in the gas-liquid detection are the qualified pipelines for detection, and the pipeline detection is completed.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline airtightness detection tooling fixture, characterized in that, including an operating platform (1); a pipe fixing component, which is movably connected to the operating platform (1). The pipe fixing component is provided with an operating ring one (2) and a plurality of limiting rods (3). The operating ring one (2) is rotatably connected to the pipe fixing component, and the limiting rods (3) are telescopically connected to the pipe fixing component through the operating ring one (2); a pipe sealing component, which is placed outside the pipe fixing component. The pipe sealing component is movably connected to the operating platform (1). The pipe sealing component is provided with an operating ring two (4) and a sealing cone head (5). The cross-sectional shape of the sealing cone head (5) is a conical shape with a fluctuating surface. The sealing cone head (5) is provided with a gas-liquid channel (6). The operating ring two (4) is rotatably connected to the pipe sealing component, and the sealing cone head (5) is movably connected to the pipe sealing component through the operating ring two (4); a gas and sound pickup component, which is placed on the side of the operating platform (1). The gas and sound pickup component is movably connected to the operating platform (1). The gas and sound pickup component is provided with an arc-shaped clamping pair (7) and a plurality of pickup rod supports (8). The pickup rod supports (8) are connected with pickups (9). The arc-shaped clamping pair (7) is rotatably connected to the gas and sound pickup component, and the pickup rod supports (8) are movably connected to the arc-shaped clamping pair (7); a water collecting plate (10), which is placed below the pipe fixing component and the pipe sealing component. The water collecting plate (10) is movably connected to the operating platform (1).

2. The airtightness detection tooling fixture for a pipeline according to claim 1, wherein, Both the pipe fixing component and the pipe sealing component are connected with a moving slide (11). The operating platform (1) is connected with a linear guide rod (12) and a linear guide rail (13). The lower end of the moving slide (11) is provided with a guide groove adapted to the linear guide rod (12). The moving slide (11) is movably connected to the linear guide rod (12) through the guide groove. The operating platform (1) is connected with a linkage seat (14). The linkage seat (14) is connected with the linear guide rail (13). The linkage seat (14) is connected with a linkage rod (15). One end of the linkage rod (15) is connected with the linkage seat (14), and the other end of the linkage rod (15) is connected with the moving slide (11).

3. The clamping fixture for pipeline airtightness detection according to claim 2, characterized in that, The pipe fixing component includes a base one (16), a fixing ring one (17) and a support ring one (18). One end of the base one (16) is connected with the moving slide (11), the other end of the base one (16) is connected with the fixing ring one (17), the support ring one (18) is connected with the fixing ring one (17), the operating ring one (2) is rotatably connected to the fixing ring one (17). The surface of the support ring one (18) is provided with a movable groove (19), the movable groove (19) is provided with a positioning hole (20), the limiting rod (3) is inserted into the positioning hole (20), the limiting rods (3) are arranged in a ring shape on the support ring one (18). The inner wall of the operating ring one (2) is connected with a top plate (21), the top plate (21) is placed in the movable groove (19), and the limiting rod (3) is movably connected to the support ring one (18) through the top plate (21).

4. The clamping fixture for pipeline airtightness detection according to claim 3, characterized in that, The fixed ring 1 (17) is provided with a connecting groove (22). The operating ring 1 (2) is connected with a connecting ring (23). The operating ring 1 (2) and the connecting ring (23) are of an integral structure. The connecting ring (23) is threadedly connected with the connecting groove (22). The surface of the operating ring 1 (2) is connected with anti-slip ridges (24). The fixed ring 1 (17) is provided with a communicating sliding hole (25). The anti-slip ridges (24) extend out of the communicating sliding hole (25).

5. The clamping fixture for pipeline airtightness detection according to claim 3, characterized in that, The top plate (21) is provided with a pushing inclined surface (26). One end face of the limiting rod (3) is in contact with the pushing inclined surface (26). The other end of the limiting rod (3) is connected with an anti-slip pad (27). The limiting rod (3) is connected with a limiting ring (28). The limiting ring (28) is connected with a return spring (29). The return spring (29) is sleeved on the limiting rod (3). The return spring (29) is connected with the bottom of the moving groove (19).

6. A pipeline airtightness detection tooling fixture according to claim 1, characterized in that, The pipeline sealing assembly includes a base 2 (30), a fixed ring 2 (31) and a support ring 2 (32). One end of the base 2 (30) is connected with the moving slide (11). The other end of the base 2 (30) is connected with the fixed ring 2 (31). The sealing cone head (5) is sleeved with a fixed shell (33). One end of the inner cavity of the fixed shell (33) is connected with the sealing cone head (5). The other end of the inner cavity of the fixed shell (33) is connected with a tee joint (34). The fixed shell (33) is provided with a limiting groove (35). The support ring 2 (32) is connected with an inserting ring (48). The inserting ring (48) is inserted into the limiting groove (35). The operating ring 2 (4) is provided with an inserting piece (36). The support ring 2 (32) is provided with an inserting slot (37). The inserting piece (36) is inserted into the inserting slot (37). The support ring 2 (32) is threadedly connected with the fixed ring 2 (31).

7. A pipeline airtightness detection tooling fixture according to claim 1, characterized in that, The air and sound pickup assembly includes a bracket (38) and a lifting rod (39). The bracket (38) is movably connected with the operating platform (1). One end of the lifting rod (39) is movably connected with the bracket (38). The other end of the lifting rod (39) is connected with a support (40). The arc-shaped clamping pair (7) is connected with a rotating rod (41). The support (40) is provided with a rotating hole (42). The rotating rod (41) is inserted into the rotating hole (42).

8. A pipeline airtightness detection tooling fixture according to claim 7, characterized in that, The arc-shaped clamping pair (7) is provided with a connecting hole (43). The pickup support rod (8) is threadedly connected with the connecting hole (43). The pickup support rods (8) are arranged in a ring around the arc-shaped clamping pair (7). One end of the pickup support rod (8) is connected with an adjusting block (44). The other end of the pickup support rod (8) is connected with the pickup (9).

9. The clamping fixture for pipeline airtightness detection according to claim 2, characterized in that, The linear guide rod (12) is clamped with a clamping seat (45). The clamping seat (45) is threadedly connected with a pipeline support (46). The pipeline support (46) is connected with a load-bearing bent plate (47).

10. A method for detecting the airtightness of a pipeline, which uses the pipeline airtightness detection tooling fixture described in any one of claims 1-9, and is characterized in that, Including the pipeline to be detected, the method includes the following steps: S1: Adjust the distance between the pipeline fixing components and pipeline sealing components on one side and those on the other side to a position suitable for the length of the pipeline to be measured by starting the linear guide rail (13). S2: Insert the pipeline into the first support ring (18), and rotate the first operation ring (2) to clamp the pipeline. S3: Rotate the second operation ring (4) to make the sealing cone head (5) enter the pipe orifice of the pipeline and press it tightly. S4: Extract the gas in the pipeline through the tee joint (34), observe the situation of the extracted gas in the pipeline to judge whether it is qualified, and remove the leaking pipeline. S5: Adjust the height of the lifting rod (39), clamp the pipeline with the arc-shaped clamping pair (7), and adjust the position of the pickup rod (8) to make the pickup close to the pipeline. S6: Pass gas through the tee joint (34) to inflate the pipeline. After sufficient gas is filled, use the moving support (38) to make the pickup detect the airtightness and flaw detection of the pipeline, and remove the leaking pipeline. S7: Continue to detect the pipelines that have not been detected as leaking. Close the ventilation, remove the lifting rod (39), insert the linear guide rod (12) into the card seat (45), and adjust the height of the pipeline support (46) and the load-bearing bending plate (47) to support the pipeline. S8: Move the water collecting plate (10) to a position suitable for the length layout of the pipeline for water collection preparation. S9: Pass liquid through the tee joint (34) to add liquid to the pipeline. The water pressure gradually increases. Further judge the airtightness of the pipeline according to whether there is leakage, and perform flaw detection according to the leakage position to complete the double detection of the pipeline.

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