A double-drive bidirectional acoustic internal detector suitable for buried gas pipeline

Abstract

The application is a double-drive and double-direction acoustic internal detector suitable for buried gas pipeline, which comprises a shell, an insertion part arranged at one axial end of the shell, a receiving part arranged at the other axial end of the shell and capable of locking or separating with the other insertion part, a plurality of sensors arranged on the peripheral wall near the axial end of the shell, a plurality of leather cups arranged symmetrically on the outer wall of the shell, a plurality of walking assemblies arranged on the shell, and the walking assemblies arranged circumferentially around the shell. The detector is used for detecting the inner wall of the pipeline, the insertion part and the receiving part are connected or separated to rescue the internal detector blocked in the pipeline, the leather cup is used for the non-powered walking of the internal detector in the pipeline, and the walking assembly is used for the powered walking of the internal detector in the pipeline.

Description

Technical Field

[0001] This invention relates to internal detectors, and in particular to a dual-drive, bidirectional acoustic internal detector suitable for buried gas pipelines. Background Technology

[0002] With the development of urban gas services, non-metallic buried gas pipelines have been widely used due to their advantages such as corrosion resistance and good flexibility. However, due to long-term burial underground, these pipelines are susceptible to defects such as leakage and deformation caused by factors such as soil stress, geological changes, and third-party construction, threatening the safety of gas transmission. Currently, there are many detection methods for non-metallic buried gas pipelines, such as pressure testing and infrared detection, but each has its limitations. Pressure testing is difficult to detect minute leaks and requires stopping gas supply, affecting normal operation; infrared detection is greatly affected by ambient temperature and humidity, and its detection accuracy is limited. Acoustic detection technology, due to its real-time, online detection capability and sensitivity to minute leaks, has become a research hotspot.

[0003] However, existing acoustic internal detectors still need improvement in terms of detection accuracy, anti-interference ability, and adaptability to complex pipeline environments; When inspecting complex pipelines, if the acoustic internal detector becomes blocked inside the pipeline due to a malfunction and cannot be removed, the only solution is to stop the gas supply and cut off the pipeline to remove the internal detector. In summary, how to detect and rescue blockages inside pipes has become an urgent problem for researchers in this field. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to achieve rescue when a blockage is detected inside a pipe; To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: This invention is a dual-drive bidirectional acoustic internal detector suitable for buried gas pipelines, comprising a housing, an insertion part provided at one axial end of the housing, and a receiving part provided at the other axial end of the housing that can be locked or separated from another insertion part of the housing; Multiple sensors are provided on the outer peripheral wall near the axial end of the housing. A diaphragm cup is symmetrically arranged on the outer wall of the housing between two diaphragm cups. Multiple walking components are provided on the housing, and the multiple walking components are arranged around the circumference of the housing.

[0005] Furthermore, the insertion part includes: an insertion shaft, which axially protrudes from the housing, and the end of the insertion shaft is fixed with a latch and an unlocking block that is sleeved on the insertion shaft.

[0006] Furthermore, the receiving part includes an insertion cavity axially opened at the end of the housing. The inner wall of the insertion cavity is provided with a plurality of mounting grooves around its axial direction. A spring is provided in the mounting groove. One end of the spring abuts against the bottom of the mounting groove, and the other end abuts against the locking member. The outer wall of the locking member protrudes from the inner wall of the insertion cavity.

[0007] Furthermore, the latch is a hemispherical structure, with one side of the latch near the housing being a flat surface and the other side away from the housing being a hemispherical surface.

[0008] Furthermore, the unlocking block is a rotary structure, with its axial center extending to both sides and its outer diameter gradually decreasing.

[0009] Furthermore, the locking member has an inclined surface that matches the outer wall of the unlocking block, and a contacting surface that engages with the tenon plane.

[0010] Furthermore, the walking assembly includes: a base fixed to the outer peripheral wall of the housing, the base being hinged at the intersection with the V-shaped member, a telescopic rod inserted into the end of the V-shaped member, an elastic member sleeved on the telescopic rod, a rotating member provided at the end of the telescopic rod, and a walking wheel connected to the rotating member through lugs extending from both ends.

[0011] Furthermore, the leather cup has a bent structure, and the openings of the leather cup are arranged opposite each other.

[0012] The beneficial effects of the present invention are as follows: The present invention is a dual-drive bidirectional acoustic internal detector suitable for buried gas pipelines. It detects the inner wall of the pipeline through the detector, and realizes the rescue of the internal detector that is blocked in the pipeline by inserting or separating the insertion part and the receiving part. It realizes the unpowered movement of the internal detector in the pipeline by the rubber cup, and realizes the powered movement of the internal detector in the pipeline by adding a walking component. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural schematic diagram of this embodiment; Figure 2 This is a schematic diagram showing the connection or unlocking of two internal detectors; Figure 3 This is a structural diagram of the locking component; Figure 4 This is a structural diagram of the walking component. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0016] See Figure 1-4 This embodiment is a dual-drive, bidirectional acoustic internal detector suitable for buried gas pipelines, including a housing 1. An insertion part 1-1 is axially provided at the right end of the housing 1, and a receiving part 1-2 is axially provided at the left end of the housing 1, which can be locked or separated from the insertion part 1-1 of another housing 1. The insertion part 1-1 can be axially inserted into the receiving part 1-2 of another internal detector, realizing the connection of the two internal detectors. This allows the powered detector to perform pipeline rescue for faulty detectors. Multiple sensors 2 are provided on the outer peripheral wall near the left and right axial ends of the housing 1. The sensors 2 are acoustic sensors, and the multiple axial sensors 2 are used for monitoring the pipe... The pipe is inspected along its inner wall, and multiple sensors 2 are used to inspect the pipe circumferentially, thus achieving all-round inspection of the inner wall of the pipe. Symmetrically arranged on the outer wall of the housing 1 are piston-like cups 3, allowing the housing 1 to move without power from the flow of the medium inside the pipe, even without the power provided by the walking components 4. Multiple walking components 4 are located between the two piston cups 3 and are arranged circumferentially around the housing 1. When there is no medium flowing inside the pipe, the walking components 4 provide power to enable autonomous movement of the internal detector within the pipe. In this embodiment, the detector is used to detect the inner wall of the pipe. The insertion part 1-1 and the receiving part 1-2 are connected and inserted or separated to rescue the blockage inside the pipe. The rubber cup 3 enables the unpowered movement of the detector inside the pipe. The addition of the walking component 4 enables the powered movement of the detector inside the pipe.

[0017] In some possible embodiments, the insertion part 1-1 includes: an insertion shaft 13, which is axially protruding from the housing 1, and the end of the insertion shaft 13 is fixed with a latch 11 and an unlocking block 12 sleeved on the insertion shaft 13; The receiving part 1-2 includes an insertion cavity 16 axially opened at the end of the housing 1. The inner wall of the insertion cavity 16 is provided with a plurality of mounting grooves around its axial direction. A spring 14 is provided in the mounting groove. One end of the spring 14 abuts against the bottom of the mounting groove, and the other end abuts against the locking member 15. The outer wall of the locking member 15 protrudes from the inner wall of the insertion cavity 16. See Figure 2 a-2c, In this embodiment, when the right detector fails, the insertion shaft 13 in the left inner detector moves to the right and inserts into the insertion cavity 16 of the right inner detector. The latch 11 enters into the insertion cavity 16, forcing the locking member 15 to move outward. After the locking member 15 no longer contacts the latch 11, the latch 11 and the locking member 15 fit together. Then the left detector moves to the left and is taken out of the pipe together with the right detector. See Figure 2 d. When it is necessary to separate the two inner detectors, the left inner detector continues to move to the right until the locking member 15 contacts the right outer wall and the left outer wall of the unlocking block 12 in sequence. Then the left inner detector moves to the left. At this time, the relative position of the locking member 15 and the unlocking block 12 does not change until the unlocking block 12 abuts against the latch 11. Finally, after the locking member 15 contacts the left outer wall of the unlocking block 12, it directly contacts the outer wall of the latch 11, disengaging the latch 11 from the locking member 15. It should be noted that when the unlocking block 12 is engaged with the latch 11, the right side of the unlocking block 12 is accommodated on the right side of the latch 11.

[0018] See Figure 3 In some possible embodiments, the latch 11 is a hemispherical structure, with one side of the latch 11 near the housing 1 being a flat surface and the other side away from the housing 1 being a hemispherical surface; the unlocking block 12 is a rotary structure, with the axial center of the unlocking block 12 extending to both sides and its outer diameter gradually decreasing; the locking member 15 has an inclined surface 151 that matches the outer wall of the unlocking block 12, and a mating surface 152 that abuts against the left side of the latch 11; In this embodiment, the latch 11 is a hemispherical structure. The left side of the latch 11 can be set as a plane or can be set to accommodate the right side of the unlocking block 12. The unlocking block 12 has two frustum structures that are integrally formed opposite each other. The locking member 15 has an inclined surface 151, the slope of which is consistent with the slope of the right side of the unlocking block 12. This realizes the connection of the two internal detectors and the unlocking after connection.

[0019] See Figure 4 In some possible embodiments, the walking assembly 4 includes: a base 41 fixed to the outer peripheral wall of the housing 1, the base 41 being hinged at the intersection with the V-shaped member 42, a telescopic rod 43 inserted into the end of the V-shaped member 42, an elastic member 44 sleeved on the telescopic rod 43, a rotating member 45 provided at the end of the telescopic rod 43, and a walking wheel 46 connected to the rotating member 45 through lugs extending from both ends; In this embodiment, when the diameter of the pipe changes, the telescopic rod 43 will contract relative to the V-shaped member 42; the V-shaped member 42 will rotate relative to the base 41 to adapt to the bending of the pipe; a rotating member 45 is provided so that the traveling wheel 46 can rotate, keeping the traveling wheel 46 in contact with the inner wall of the pipe at all times.

[0020] In some possible embodiments, the leather cup 3 has a bent structure, and the openings of the leather cup 3 are arranged opposite to each other; In this embodiment, the cross-section of the cup 3 is W-shaped. The cup 3 has a certain supporting elasticity to the inner wall of the pipe, so that the cup 3 is in sealed contact with the inner wall of the pipe, thereby realizing the movement of the subsequent shell during the flow of the medium.

[0021] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dual-drive, bidirectional acoustic internal detector suitable for buried gas pipelines, characterized in that, The device includes a housing, with an insertion portion at one axial end and a receiving portion at the other axial end that can be locked or separated from another insertion portion of the housing. Multiple sensors are provided on the outer peripheral wall near the axial end of the housing. A diaphragm cup is symmetrically arranged on the outer wall of the housing between two diaphragm cups. Multiple walking components are provided on the housing, and the multiple walking components are arranged around the circumference of the housing.

2. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 1, characterized in that, The insertion part includes: an insertion shaft, which protrudes axially from the housing, and the end of the insertion shaft is fixed with a latch and an unlocking block that is sleeved on the insertion shaft.

3. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 2, characterized in that, The receiving part includes an insertion cavity axially opened at the end of the housing. The inner wall of the insertion cavity is provided with a plurality of mounting grooves around its axial direction. A spring is provided in the mounting groove. One end of the spring abuts against the bottom of the mounting groove, and the other end abuts against a locking member. The outer wall of the locking member protrudes from the inner wall of the insertion cavity.

4. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 2, characterized in that, The latch is a hemispherical structure, with one side of the latch near the housing being a flat surface and the other side away from the housing being a hemispherical surface.

5. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 2, characterized in that, The unlocking block is a rotating structure, with its axial center extending to both sides and its outer diameter gradually decreasing.

6. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 4, characterized in that, The locking member has an inclined surface that matches the outer wall of the unlocking block, and a contacting surface that engages with the tenon plane.

7. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 1, characterized in that, The walking assembly includes: a base fixed to the outer peripheral wall of the housing, the base being hinged at the intersection with the V-shaped member, a telescopic rod inserted into the end of the V-shaped member, an elastic member sleeved on the telescopic rod, a rotating member provided at the end of the telescopic rod, and a walking wheel connected to the rotating member through lugs extending from both ends.

8. The dual-drive, bidirectional acoustic internal detector for buried gas pipelines according to claim 1, characterized in that, The leather cup has a bent structure, and the openings of the leather cups are arranged opposite each other.

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