A quick-connect mechanism suitable for equipment traveling in a pipeline

Abstract

The present invention relates to a quick-connect mechanism suitable for equipment traveling in a pipeline, comprising a pipeline crawler composed of a detection assembly, a driving vehicle, a trailer assembly and a quick-connect mechanism, wherein the detection assembly, the driving vehicle and the trailer assembly are connected in sequence through the quick-connect mechanism, and the quick-connect mechanism comprises a sleeve unit and a shaft unit; the sleeve unit comprises a left universal assembly and a tapered sleeve, a limit plate is arranged at the end of the tapered sleeve, and an unlocking plate is elastically slidably connected to the tapered sleeve in the axial direction; a plurality of locking pins are elastically slidably connected to the tapered sleeve in the radial direction, and each of the locking pins is sleeved with a push plate, and one end of the push plate axially extends out of the tapered sleeve and bends upward; the shaft unit comprises a right universal assembly and a tapered shaft, and the right universal assembly and the left universal assembly have the same structure, the tapered shaft is placed in the tapered sleeve, a pin groove is circumferentially opened on the tapered shaft, and the head of the locking pin is placed in the pin groove. The present invention can realize flexible and quick connection between various components of the equipment traveling in the pipeline, can perform flexible steering, pass through the bend of the pipeline well, and has strong flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of equipment traveling in pipelines, and in particular to a quick-connect mechanism suitable for equipment traveling in pipelines. Background Art

[0002] Pipeline transportation is a method of transporting liquid or gas materials over long distances, and is often used to transport oil, natural gas, etc. from production sites to the market. It has many advantages such as large transportation volume, continuity, speed, economy, and safety.

[0003] As a kind of moving equipment in pipelines, pipeline crawlers are often used for defect inspection and repair of the above pipelines. However, pipelines are not always laid out in a straight line, and there are often bends and curves, so pipeline crawlers are mostly flexible structures.

[0004] The flexible structure of the pipeline crawler is assembled in a modular manner, and each module is connected by a universal joint or a cross universal coupling to adapt well to the bends of the pipeline. The crawler can pass smoothly through the bends and curves to ensure the smooth progress of the inspection.

[0005] Taking the crawling device for ultrasonic guided wave detection of damage in complex spatial steel structures disclosed in authorization announcement number CN206479493U as an example, its scheme includes a driving module, an extension module, a bearing module and a guide module; the driving module, the extension module, the bearing module and the guide module are respectively connected in sequence through universal joints, and the modules of its scheme are connected through universal joints to ensure good cornering ability. The universal joint structure makes it inconvenient to connect and install the modules, and once a module is damaged, the corresponding disassembly and replacement is also inconvenient.

[0006] The crawling device crawls normally in the initial straight state. The crawling device in the pipeline bends. After passing the bend, the universal joint can only passively recover under the restriction of the pipeline, which has poor flexibility. As a result, the crawling device appears to be slow and stiff when returning to the initial state. Therefore, a quick-connect mechanism suitable for equipment traveling in pipelines is proposed. Summary of the invention

[0007] In order to solve the problem of inconvenient connection and installation, and inconvenient disassembly and replacement between modules of the traveling equipment in the pipeline, the present invention provides a quick connection mechanism suitable for the traveling equipment in the pipeline.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is:

[0009] A quick-connect mechanism suitable for equipment traveling in a pipeline, comprising a pipeline crawler consisting of a detection assembly, a driving vehicle, a trailer assembly and a quick-connect mechanism, wherein the detection assembly, the driving vehicle and the trailer assembly are sequentially connected through the quick-connect mechanism, and the quick-connect mechanism comprises a sleeve unit and a shaft unit;

[0010] The sleeve unit comprises a left universal assembly and a tapered sleeve, wherein the left universal assembly comprises a universal ball seat and a universal ball shaft connected in a universal manner, and a large spring sleeved on the universal ball shaft; the universal ball shaft is coaxially threadedly connected with the tapered sleeve, the tapered sleeve is in a hollow stepped columnar shape, a limit plate is arranged at the end of the tapered sleeve, an unlocking plate is axially elastically slidably connected on the tapered sleeve, and the unlocking plate abuts against the limit plate;

[0011] A plurality of locking pins uniformly distributed in an annular direction are elastically slidably connected radially in the conical sleeve, and a push plate is sleeved on each of the locking pins to drive the locking pin to slide. One end of the push plate axially extends out of the conical sleeve and bends upward, and the chamfered side edge of the unlocking disk is adapted to the bend of the push plate;

[0012] The shaft unit includes a right universal joint assembly and a tapered shaft. The right universal joint assembly has the same structure as the left universal joint assembly. The universal ball shaft of the right universal joint assembly is coaxially threaded with the tapered shaft. The tapered shaft is placed in a tapered sleeve. A pin groove is annularly provided on the tapered shaft. The head of the locking pin is placed in the pin groove and clamped.

[0013] Furthermore, the universal ball seat includes a quick-connect plate, a flange and a load-bearing ring connected by bolts, the cross-section of the flange is in the shape of a Chinese character "J", the flange is buckled on the quick-connect plate, and the load-bearing ring is arranged between the flange and the quick-connect plate; the universal ball shaft includes an integrally formed sphere and a shaft body, the sphere is placed in the load-bearing ring, the sphere is located at the end of the shaft body, one end of the shaft body extends out of the flange, and the large spring is sleeved on the shaft body.

[0014] Furthermore, the conical sleeve is a stepped columnar structure made of a connecting portion and a clamping portion, the connecting portion has a diameter smaller than that of the clamping portion, a truncated cone-shaped clamping groove is coaxially provided in the conical sleeve, and the clamping groove passes through the clamping portion and extends into the connecting portion.

[0015] Furthermore, the large spring of the left universal joint assembly is against the universal ball seat and the connecting part, the end of the connecting part is screwed to the limit plate, and the diameter of the limit plate is larger than the diameter of the connecting part; a plurality of connecting screws are provided between the limit plate and the clamping part for connection, and the connecting screws are circumferentially arranged around the connecting part.

[0016] Furthermore, the unlocking disk is sleeved on the connecting part, the unlocking disk is inserted between the connecting screws, the unlocking disk slides left and right along the connecting screws to move away from or close to the end face of the clamping part, and a small spring is sleeved on the connecting screw between the unlocking disk and the clamping part.

[0017] Furthermore, a plurality of sliding grooves are provided in an annular direction in the clamping portion, the sliding grooves are stepped and connected to the clamping grooves, a hollow locking cap is threadedly connected to the top of the sliding groove, and the locking pin is elastically slidably connected in the sliding groove.

[0018] Furthermore, the locking pin includes a first section, a middle section and a tail section connected in sequence, the head of the first section extends out of the sliding slot and is placed in the slot, the middle section protrudes from the first section, the tail section extends out of the sliding slot and passes through the locking cap, and a compression spring is provided on the tail section between the locking cap and the middle section.

[0019] Furthermore, one end of the push plate extends into the sliding groove, one end of the push plate is sleeved on the first section and fits with the middle section, and the other end of the push plate extends out of the sliding groove and bends upward; multiple push plates are circumferentially arranged on the end face of the clamping part, and multiple push plates are arranged in a circle, and the unlocking disk is located in the circle formed by the push plate.

[0020] Furthermore, the large spring of the right universal joint assembly is pressed between the universal ball seat and the tapered shaft, the tapered shaft matches the slot, and the tapered shaft is placed in the slot.

[0021] Through the above technical solution, the beneficial effects of the present invention are:

[0022] The structural design of the present invention is reasonable. The detection assembly, the driving vehicle and the trailer assembly are separate modules, which are connected to each other through a quick-connect mechanism. The quick-connect mechanism can realize flexible and rapid connection between the detection assembly, the driving vehicle and the trailer assembly, and then can perform flexible steering, pass through the bends of the pipeline well, and has strong flexibility.

[0023] The invention cooperates with the tapered shaft and the tapered sleeve, and the locking pin is clamped in the pin groove, so that the sleeve unit and the shaft unit can be connected, and the connection is convenient and fast; the sleeve unit and the shaft unit can be separated by pushing the unlocking disk to make the locking pin move outward synchronously, which is convenient to use, and makes it easy to install the various components of the traveling equipment in the pipeline. If a component is damaged, it can be replaced in a targeted manner.

[0024] The present invention enables the crawler body to flexibly crawl and turn along the inner wall of the pipeline through the quick-connect mechanism, thereby improving the turning ability of the pipeline crawler and ensuring that it can effectively pass through a curve with a certain curvature radius.

[0025] The quick-connect mechanism of the present invention is not only suitable for pipeline creeping detection equipment, but also can be used for traveling equipment that is centrally docked inside the pipeline, such as pipeline spraying equipment, cleaning equipment, etc. It can conveniently connect various components of the corresponding equipment, has strong versatility and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a pipeline crawler with a quick-connect mechanism suitable for equipment traveling in a pipeline according to the present invention.

[0027] Figure 2 The invention is a quick-connect mechanism suitable for equipment traveling in a pipeline. Figure 1 Enlarged schematic diagram of the quick-connect mechanism at point A in the middle.

[0028] Figure 3 The invention is a quick-connect mechanism suitable for equipment traveling in a pipeline. Figure 2 Middle BB section view.

[0029] Figure 4 The invention is a quick-connect mechanism suitable for equipment traveling in a pipeline. Figure 3 Cross-sectional view of the middle clamping part.

[0030] Figure 5 The invention is a schematic diagram of a locking pin structure of a quick-connect mechanism suitable for equipment traveling in a pipeline.

[0031] Figure 6 The present invention is a schematic diagram of the separation of a sleeve unit and a shaft unit of a quick-connect mechanism suitable for equipment traveling in a pipeline.

[0032] Figure 7 The invention is a quick-connect mechanism suitable for equipment traveling in a pipeline. Figure 6 sectional view of .

[0033] Figure 8 The invention is a quick-connect mechanism suitable for equipment traveling in a pipeline. Figure 7 Schematic diagram of the separation of the middle unlocking disc and the conical sleeve.

[0034] The numbers in the accompanying drawings are: 1 is a detection assembly, 2 is a driving vehicle, 3 is a trailer assembly, 41 is a universal ball seat, 411 is a quick-connect plate, 412 is a flange, 413 is a load-bearing ring, 42 is a universal ball shaft, 43 is a large spring, 5 is a tapered sleeve, 51 is a connecting part, 52 is a clamping part, 6 is a limit plate, 7 is an unlocking plate, 8 is a locking pin, 81 is a first section, 82 is a middle section, 83 is a tail section, 9 is a push plate, 10 is a tapered shaft, 11 is a pin groove, 12 is a clamping groove, 13 is a connecting screw, 14 is a small spring, 15 is a sliding groove, 16 is a locking cap, and 17 is a compression spring. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings:

[0036] like Figure 1 to Figure 8 As shown, a quick-connect mechanism suitable for equipment traveling in a pipeline includes a pipeline crawler consisting of a detection assembly 1, a driving vehicle 2, a trailer assembly 3 and a quick-connect mechanism. The detection assembly 1, the driving vehicle 2 and the trailer assembly 3 are connected in sequence through the quick-connect mechanism. The detection assembly 1, the driving vehicle 2 and the trailer assembly 3 can be connected as a whole through the quick-connect mechanism to form a pipeline crawler.

[0037] In this embodiment, the quick-connect mechanism includes a sleeve unit and a shaft unit; the sleeve unit includes a left universal joint assembly and a tapered sleeve 5, and the left universal joint assembly includes a universal ball seat 41 and a universal ball shaft 42 with a universal connection and a large spring 43 sleeved on the universal ball shaft 42.

[0038] Specifically, the universal ball seat 41 is used for installation with the pipeline crawler, and the universal ball seat 41 includes a quick-connect plate 411, a flange 412 and a bearing ring 413 connected by bolts, the quick-connect plate 411 is disc-shaped, the cross section of the flange 412 is a "J" shape, and the flange 412 is buckled on the quick-connect plate 411. A cavity is left between the flange 412 and the quick-connect plate 411, and the bearing ring 413 is arranged between the flange 412 and the quick-connect plate 411. The number of the bearing rings 413 is two arranged side by side, and the bearing rings 413 are placed in the cavity.

[0039] The universal ball shaft 42 includes an integrally formed sphere and shaft. The sphere is placed in a bearing ring 413 . The sphere is located at the end of the shaft. One end of the shaft extends out of the flange 412 . The large spring 43 is sleeved on the shaft.

[0040] In this embodiment, the universal ball shaft 42 is coaxially threadedly connected with the tapered sleeve 5, and the tapered sleeve 5 is a hollow stepped column. Specifically, the tapered sleeve 5 is a stepped column structure integrally formed by a connecting portion 51 and a clamping portion 52, the connecting portion 51 has a smaller diameter than the clamping portion 52, and a truncated cone-shaped clamping groove 12 is coaxially opened in the tapered sleeve 5, and the clamping groove 12 passes through the clamping portion 52 and extends into the connecting portion 51.

[0041] When the left universal joint assembly is installed with the tapered sleeve 5, the universal ball shaft 42 of the left universal joint assembly is connected and installed with the connecting portion 51 of the tapered sleeve 5, and the large spring 43 of the left universal joint assembly is pressed between the universal ball seat 41 and the connecting portion 51. After the connection and installation, there is a certain interval between the left universal joint assembly and the tapered sleeve 5, and the large spring 43 is placed in the interval, and the connecting portion 51 is close to the universal ball seat 41 of the left universal joint assembly.

[0042] In this embodiment, a limiting plate 6 is provided at the end of the conical sleeve 5. The limiting plate 6 is in a circular ring shape. When the limiting plate 6 is installed, the end of the connecting portion 51 is screwed to the limiting plate 6. The diameter of the limiting plate 6 is larger than the diameter of the connecting portion 51.

[0043] The unlocking disk 7 is axially elastically slidably connected to the conical sleeve 5, that is, the unlocking disk 7 can slide axially along the conical sleeve 5 and is subject to a certain elastic resistance when sliding.

[0044] In order to realize the sliding of the unlocking plate 7, a plurality of connecting screws 13 are provided between the limit plate 6 and the clamping portion 52. After the limit plate 6 is installed on the conical sleeve 5 by means of screws, it is installed with the conical sleeve 5 again by means of the connecting screws 13. The connecting screws 13 are circumferentially arranged around the connecting portion 51.

[0045] Specifically, the unlocking disk 7 is annular, and is sleeved on the connecting portion 51, and the unlocking disk 7 is inserted between the connecting screws 13. The unlocking disk 7 can slide left and right along the connecting screws 13 to move away from or approach the end surface of the clamping portion 52, and a small spring 14 is sleeved on the connecting screw 13 between the unlocking disk 7 and the clamping portion 52, and the small spring 14 is clamped by the unlocking disk 7 and the clamping portion 52 and is compressed.

[0046] The unlocking plate 7 is subjected to elastic resistance of the small spring 14 when sliding left and right; in the initial state, under the action of the small spring 14, the unlocking plate 7 is against the limiting plate 6.

[0047] In this embodiment, the conical sleeve 5 is radially elastically slidably connected with a plurality of circumferentially evenly distributed locking pins 8. In order to facilitate the installation of the locking pins 8, the clamping portion 52 is circumferentially provided with a plurality of sliding grooves 15. The sliding grooves 15 are stepped and connected to the clamping grooves 12. A hollow locking cap 16 is threadedly connected to the top of the sliding groove 15, and the locking pins 8 are elastically slidably connected in the sliding groove 15.

[0048] The locking pin 8 includes a first section 81, a middle section 82 and a tail section 83 connected in sequence. The head of the first section 81 extends out of the sliding groove 15 and is placed in the card slot 12. The middle section 82 protrudes from the first section 81. The tail section 83 extends out of the sliding groove 15 and passes through the locking cap 16. A compression spring 17 is sleeved on the tail section 83 between the locking cap 16 and the middle section 82. The compression spring 17 is clamped by the locking cap 16 and the middle section 82 and is thus compressed.

[0049] In order to realize the sliding of the locking pin 8, a push plate 9 is provided on each locking pin 8, and the locking pin 8 can be driven to slide by the push plate 9. One end of the push plate 9 axially extends out of the conical sleeve 5 and bends upward, and the chamfered side edge of the unlocking disk 7 is adapted to the bending part of the push plate 9.

[0050] Specifically, one end of the push plate 9 extends into the sliding groove 15, one end of the push plate 9 is sleeved on the first section 81 and fits with the middle section 82, and the other end of the push plate 9 extends out of the sliding groove 15 and bends upward. A plurality of the push plates 9 are circumferentially arranged on the end surface of the clamping portion 52, and the plurality of push plates 9 are arranged in a circle, and the unlocking disk 7 is located in the circle formed by the push plates 9.

[0051] In this embodiment, the shaft unit includes a right universal joint assembly and a tapered shaft 10. The right universal joint assembly has the same structure as the left universal joint assembly. The universal ball shaft 42 of the right universal joint assembly is coaxially threaded with the tapered shaft 10, and the large spring 43 of the right universal joint assembly is pressed between the universal ball seat 41 and the tapered shaft 10.

[0052] The tapered shaft 10 is placed in the tapered sleeve 5. Specifically, the tapered shaft 10 matches the slot 12, and the tapered shaft 10 is inserted into the slot 12. A pin slot 11 is circumferentially provided on the tapered shaft 10, and the head of the locking pin 8 is placed in the pin slot 11 for clamping, thereby connecting the sleeve unit and the shaft unit.

[0053] The quick-connect mechanism is installed between the detection assembly 1 and the driving vehicle 2, and between the driving vehicle 2 and the trailer assembly 3, so as to connect the detection assembly 1, the driving vehicle 2 and the trailer assembly 3. Taking the connection between the driving vehicle 2 and the trailer assembly 3 as an example, when the quick-connect mechanism is specifically installed, the sleeve unit is installed with the driving vehicle 2, and the shaft unit is installed with the trailer assembly 3.

[0054] When the sleeve unit and the driving vehicle 2 are installed, the universal ball seat 41 of the left universal assembly is connected to the driving vehicle 2 for installation. Specifically, the quick-connect plate 411 and the flange 412 are connected by a plurality of bolts, and the bolts are divided into large bolts and small bolts, and the large bolts and small bolts are alternately distributed in the circumferential direction. The small bolts are short in length, and the small bolts pass through the flange 412 and the quick-connect plate 411 in sequence to connect the two; the large bolts are long in length, and the large bolts pass through the flange 412 and the quick-connect plate 411 in sequence before connecting to the driving vehicle 2.

[0055] When the axle unit and the trailer assembly 3 are installed, they are connected and installed with the trailer assembly 3 through the universal ball seat 41 of the right universal joint assembly. The specific installation method is the same as the installation method of the sleeve unit and the driving vehicle 2, and will not be repeated here.

[0056] In the initial state, the driving vehicle 2 is equipped with a sleeve unit, and the trailer assembly 3 is equipped with an axle unit. When the driving vehicle 2 and the trailer assembly 3 need to be connected, the two are brought close to each other until the tapered shaft 10 is inserted into the slot 12. During the insertion process, the locking pin 8 is squeezed by the tapered sleeve 5 and first extends outward along the radial direction of the tapered sleeve 5, and the compression spring 17 is gradually compressed until the locking pin 8 is inserted into the pin slot 11. Under the action of the compression spring 17, the head of the locking pin 8 is always placed in the pin slot 11 and does not fall out. The connection is convenient and reliable, ensuring the effective connection of the sleeve unit and the axle unit, and then ensuring the reliable connection between the driving vehicle 2 and the trailer assembly 3.

[0057] The detection assembly 1 and the driving vehicle 2 are securely connected in the above manner, and the pipeline crawler is assembled; when the pipeline crawler passes through the straight pipe, the large spring 43 has sufficient tensioning force to ensure that the universal ball shaft 42 of the left universal joint assembly and the universal ball shaft 42 of the right universal joint assembly remain coaxial, and then the sleeve unit and the shaft unit are coaxial.

[0058] When the pipeline crawler passes through a bend, the large spring 43 is compressed and deformed, and the sleeve unit and the shaft unit are not coaxial. After passing through the bend, the elastic force of the large spring 43 gradually recovers, ensuring that the quick-connect mechanism quickly recovers the coaxial state and achieves effective connection.

[0059] Once a component of the pipeline crawler is damaged, it can be disassembled in time through the quick-connect mechanism; taking the damage of the trailer assembly 3 as an example, the unlocking disk 7 is manually pushed to make the unlocking disk 7 slide toward the clamping portion 52 and approach the clamping portion 52. When sliding, the unlocking disk 7 rests on multiple push plates 9, which can simultaneously prop up multiple push plates 9. The multiple push plates 9 spread outward at the same time, thereby driving the locking pin 8 to move so that the first section 81 no longer extends into the pin groove 11, and the tapered shaft 10 can be disengaged from the clamping groove 12, thereby realizing the separation of the sleeve unit and the shaft unit.

[0060] The detection assembly 1, driving vehicle 2 and trailer assembly 3 of the pipeline crawler are connected in series, and each section is connected by a quick-connect mechanism. Only human thrust is required to achieve flexible connection of the equipment, avoiding the crawler being unable to turn due to being too long. Under the action of the quick-connect mechanism, flexible connection can be achieved between the detection assembly 1 and the driving vehicle 2, and between the driving vehicle 2 and the trailer assembly 3, and then flexible steering can be performed, and it can pass through the bends of the pipeline well, with strong flexibility.

[0061] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A quick-connect mechanism suitable for equipment traveling in a pipeline, applied to a pipeline crawler, the pipeline crawler consisting of a detection assembly (1), a driving vehicle (2), a trailer assembly (3) and a quick-connect mechanism, wherein the detection assembly (1), the driving vehicle (2) and the trailer assembly (3) are connected in sequence through the quick-connect mechanism, and characterized in that: The quick-connect mechanism includes a sleeve unit and a shaft unit; The sleeve unit includes a left universal joint assembly and a tapered sleeve (5). The left universal joint assembly includes a universal ball seat (41) and a universal ball shaft (42) that are universally connected, and a large spring (43) sleeved on the universal ball shaft (42). The universal ball seat (41) includes a quick-connect plate (411), a flange (412), and a bearing ring (413) that are bolt-connected. The cross-section of the flange (412) is in a "C" shape. The flange (412) is buckled on the quick-connect plate (411). There is a cavity between the flange (412) and the quick-connect plate (411). The bearing ring (413) is arranged between the flange (412) and the quick-connect plate (411). The number of bearing rings (413) is two arranged side by side, and the bearing rings (413) are placed in the cavity; The universal ball shaft (42) includes a sphere and a shaft body integrally formed. The sphere is placed in the bearing ring (413), the sphere is located at the end of the shaft body, one end of the shaft body extends out of the flange (412), and the large spring (43) is sleeved on the shaft body; The universal ball shaft (42) is coaxially thread-connected with the tapered sleeve (5). The tapered sleeve (5) is a hollow stepped column. A limit disk (6) is provided at the end of the tapered sleeve (5). An unlocking disk (7) is axially elastically slidably connected to the tapered sleeve (5), and the unlocking disk (7) abuts against the limit disk (6); A plurality of locking pins (8) that are circumferentially evenly distributed are radially elastically slidably connected in the tapered sleeve (5). A push plate (9) is sleeved on each locking pin (8) to drive the locking pin (8) to slide. One end of the push plate (9) axially extends out of the tapered sleeve (5) and bends upward. The chamfer on the side edge of the unlocking disk (7) is adapted to the bent portion of the push plate (9); The shaft unit includes a right universal joint assembly and a tapered shaft (10). The right universal joint assembly has the same structure as the left universal joint assembly. The universal ball shaft (42) of the right universal joint assembly is coaxially thread-connected with the tapered shaft (10). The tapered shaft (10) is placed in the tapered sleeve (5). A pin slot (11) is circumferentially opened on the tapered shaft (10), and the head of the locking pin (8) is placed in the pin slot (11) for clamping; 2. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 1, characterized in that: The tapered sleeve (5) is a stepped columnar structure made of a connecting portion (51) and a clamping portion (52). The diameter of the connecting portion (51) is smaller than the diameter of the clamping portion (52). A frustum-shaped card slot (12) is coaxially opened in the tapered sleeve (5), and the card slot (12) penetrates through the clamping portion (52) and extends into the connecting portion (51); 3. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 2, characterized in that: The large spring (43) of the left universal joint assembly abuts between the universal ball seat (41) and the connecting portion (51). The limit disk (6) is screwed to the end of the connecting portion (51), and the diameter of the limit disk (6) is larger than the diameter of the connecting portion (51); A plurality of connecting screws (13) are provided between the limit disk (6) and the clamping portion (52) for connection. The connecting screws (13) are circumferentially arranged around the periphery of the connecting portion (51).

4. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 3, characterized in that: The unlocking disk (7) is sleeved on the connecting portion (51), the unlocking disk (7) is inserted between the connecting screws (13), the unlocking disk (7) slides left and right along the connecting screws (13) to move away from or approach the end surface of the clamping portion (52), and a small spring (14) is sleeved on the connecting screws (13) between the unlocking disk (7) and the clamping portion (52).

5. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 2, characterized in that: A plurality of sliding grooves (15) are provided in an annular direction inside the clamping portion (52); the sliding grooves (15) are stepped and communicate with the clamping groove (12); a hollow locking cap (16) is threadedly connected to the top of the sliding groove (15); and the locking pin (8) is elastically slidably connected inside the sliding groove (15).

6. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 5, characterized in that: The locking pin (8) comprises a first section (81), a middle section (82) and a tail section (83) which are connected in sequence; the head of the first section (81) extends out of the sliding groove (15) and is placed in the clamping groove (12); the middle section (82) protrudes from the first section (81); the tail section (83) extends out of the sliding groove (15) and passes through the locking cap (16); and a compression spring (17) is sleeved on the tail section (83) between the locking cap (16) and the middle section (82).

7. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 6, characterized in that: One end of the push plate (9) extends into the sliding groove (15), one end of the push plate (9) is sleeved on the first section (81) and fits with the middle section (82), and the other end of the push plate (9) extends out of the sliding groove (15) and bends upward; The plurality of push plates (9) are circumferentially arranged on the end surface of the clamping portion (52), the plurality of push plates (9) are arranged in a circle, and the unlocking disk (7) is located in the circle formed by the push plates (9).

8. A quick-connect mechanism suitable for equipment traveling in a pipeline according to claim 2, characterized in that: The large spring (43) of the right universal joint assembly is pressed between the universal ball seat (41) and the tapered shaft (10); the tapered shaft (10) matches the slot (12); and the tapered shaft (10) is placed in the slot (12).

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