A quick connect device for pipes

Abstract

This application relates to a quick pipe connection device, belonging to the technical field of construction pipe connection, including a first pipe and a second pipe with a cross-section larger than the first pipe; several positioning plates are fixed on the outer periphery of the end of the second pipe, and a fixed sleeve with a cross-section larger than the second pipe is fixed on the outer periphery of the end of the first pipe. An annular protrusion is fixed on the inner edge of the opening of the fixed sleeve away from the first pipe, and a clearance notch is opened on the annular protrusion for the positioning plates to pass through; a limiting component is provided on the outer periphery of the second pipe; in this application, the positioning plate is rotated and misaligned after passing through the clearance notch, and is axially locked in conjunction with the limiting component, completely eliminating the cumbersome mode of tightening flange bolts hole by hole in the traditional method; this design only requires three steps of "insertion-rotation-locking" to complete the quick connection of pipes of different diameters, greatly shortening the assembly and disassembly time, and significantly improving the efficiency of lining trolley transfer and pipeline restoration.

Description

Technical Field

[0001] This application relates to the technical field of construction pipeline connections, and in particular to a quick pipeline connection device. Background Technology

[0002] In tunnel construction, the lining trolley is the core equipment for secondary lining pouring. Its operating area typically requires a stable and continuous supply of high-pressure air and water to meet the needs of roughening, cleaning, curing, and auxiliary operations during construction. With the increasing mechanization of tunnel construction, the movement, positioning, and workface changes of the lining trolley are becoming more frequent, placing higher demands on the connectivity efficiency, sealing reliability, and ease of assembly and disassembly of the supporting pipelines. Currently, most high-pressure air and water supply pipelines in the lining trolley operating section adopt a direct fixed connection method at the ends of reducing pipes.

[0003] In related technologies, a common pipe connection device mainly consists of a first pipe body and a second pipe body with different diameters. Typically, a first flange is welded to the outer circumference of the first pipe body, and a second flange is welded to the outer circumference of the second pipe body. During assembly, a sealing ring is pre-placed between the two flanges, and then the connection is secured using multiple sets of bolts and nuts to achieve the connection and sealing of pipes with different diameters. This structure relies on the flange end face pressing the sealing ring to form a seal, and the bolts provide axial locking force. The assembled pipe structure is arranged overhead / hanging along the inner wall of the tunnel and the lining trolley body, belonging to the category of exposed, surface-mounted pipelines within the tunnel.

[0004] In the aforementioned related technologies, since a large number of bolts are required to connect the first flange and the second flange, special tools are needed to align and tighten the bolts one by one during assembly, and they need to be loosened one by one during disassembly. The overall disassembly and assembly process is cumbersome and time-consuming, which seriously affects the efficiency of trolley relocation and pipeline restoration. Therefore, the existing connection method has obvious defects in terms of disassembly and assembly efficiency and reliability, and there is considerable room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a quick pipe connection device to solve the problems of cumbersome disassembly and assembly, long time consumption, and serious impact on the efficiency of lining trolley relocation and pipeline restoration in the above-mentioned related technologies.

[0006] The quick pipe connection device provided in this application adopts the following technical solution: A quick-connect pipe device includes a first pipe and a second pipe with a cross-section larger than that of the first pipe. Several positioning plates are fixedly mounted on the outer periphery of the end of the second pipe. A fixing sleeve with a cross-section larger than that of the second pipe is fixedly mounted on the outer periphery of the end of the first pipe. An annular protrusion is fixedly mounted on the inner edge of the fixing sleeve away from the opening of the first pipe. A clearance notch is provided on the annular protrusion for the positioning plates to pass through. A limiting element is provided on the outer periphery of the second pipe. When the fixing sleeve is fitted onto the outer periphery of the end of the second pipe, the positioning plate passes through the clearance notch. The side of the positioning plate away from the first pipe can then abut against the inner side of the annular protrusion and be fixed by the limiting element after the second pipe rotates around its own axis.

[0007] By adopting the above technical solution, the positioning plate is rotated and misaligned after passing through the clearance notch, and then axially locked with the limiting component, completely eliminating the cumbersome traditional method of tightening flange bolts hole by hole. This design only requires three steps of "insertion-rotation-locking" to complete the rapid connection of pipes of different diameters, greatly shortening the time spent on assembly and disassembly, significantly improving the efficiency of lining trolley relocation and pipeline restoration, and solving the core pain point of low on-site construction efficiency.

[0008] Optionally, the limiting component includes two limiting half-rings sleeved on the outer periphery of the second pipe and a locking ring sleeved on the outer periphery of the second pipe. A positioning block is fixed on the side of the positioning plate away from the first pipe, and a clearance through hole is opened on the annular convex plate. The inner wall of the locking ring is provided with an internal thread, and the outer periphery of the second pipe is provided with an external thread that mates with the locking ring thread. The two limiting half-rings are located between the locking ring and the positioning plate, and a limiting slot is opened on the side of the limiting half-rings facing the positioning plate. After the first pipe and the second pipe are assembled, the positioning block passes through the clearance through hole and is inserted into the limiting slot. At this time, after the locking ring thread is adjusted, the two opposite sides of the limiting half-rings abut against the sides of the annular convex plate and the locking ring that are close to each other, and the two limiting half-rings are in a limiting state.

[0009] By adopting the above technical solution, a dual mechanical limiting system is constructed by axially inserting the positioning block and the limiting slot, combined with the radial clamping formed by the locking ring pressing the semi-ring. This structure can effectively prevent the pipeline from loosening or falling off when subjected to high-pressure wind and water impact, ensuring the static and dynamic stability of the connection structure and guaranteeing the long-term reliable operation of the tunnel high-pressure transmission system.

[0010] Optionally, an elastic sealing ring is provided between the annular convex plate and the two limiting half rings, and a sealing ring groove for the elastic sealing ring to be embedded is opened on the outer edge of the side of the annular convex plate facing the limiting half ring.

[0011] By adopting the above technical solution, the elastic sealing ring is pre-placed in the sealing ring groove, and after assembly, the annular convex plate and the limiting half-ring form a forced compression seal. This embedded seal not only establishes a reliable end-face sealing cavity to prevent media leakage, but also significantly reduces the processing requirements for the flatness of the contact surface. At the same time, it has good compensation and self-tightening sealing performance, adapting to the complex pressure fluctuation environment in tunnels.

[0012] Optionally, the outer diameter of the limiting half-ring decreases in the direction toward the locking ring.

[0013] By adopting the above technical solution, the limiting semi-ring features a tapered design with a small outer edge and a large inner edge, which can accurately fit the tapered guide surface inside the fixing sleeve. This design provides precise tapered surface guidance and diameter expansion space for pipe connection, effectively reducing the difficulty of alignment during assembly.

[0014] Optionally, the two limiting half-rings are rotatably connected to an elastic positioning rod with elastic shortening properties at the outer edge of their sides that are close to each other and far from the locking ring; the end of the elastic positioning rod is rotatably connected to a positioning hook, and a positioning ring groove is provided on the side of the locking ring that is far from the limiting half-ring; the positioning hook can be inserted into the positioning ring groove as the elastic positioning rod rotates when the limiting half-ring is in the limiting state.

[0015] By adopting the above technical solution, the positioning hook engages with the positioning ring groove of the locking ring, and the elastic preload of the elastic positioning rod provides continuous and adjustable locking feedback. This structure effectively overcomes the problem of micro-vibration loosening caused by high-pressure fluid impact, enhances the vibration resistance of the connection, prevents sealing failure or connection detachment due to prolonged vibration, and improves the safety redundancy of the system.

[0016] Optionally, when the two limiting half-rings are in the limiting state, the side facing the locking ring is the stop surface, and the side facing each other is the support surface; when the first pipe and the second pipe are not assembled, the two limiting half-rings are placed on the ground, the two support surfaces face the ground, the two stop surfaces are in contact with each other, the two elastic positioning rods on the same side can rotate to the coaxial state, the two positioning hooks can be engaged and fixed to each other, and the two limiting half-rings are in the receiving state of supporting one end of the first pipe and the second pipe.

[0017] By adopting the above technical solution, the two limiting semi-rings can be fitted together by the anti-reverse surface and the supporting surface touching the ground, and can be connected by the elastic positioning rod and the positioning hook to form an independent "temporary support structure". This innovation solves the problem of where to place the end of the pipeline during the pre-assembly stage and the problem of easy impact damage, and achieves effective protection of the high-pressure pipeline end and sealing surface, reducing construction losses.

[0018] Optionally, when the positioning hook is engaged in the positioning ring groove, a fixing block is slidably provided on the side away from the limiting half ring of the elastic positioning rod. The fixing block can slide back and forth along the length direction of the elastic positioning rod. A fixing plate is rotatably connected to the side edge of the fixing block away from the elastic positioning rod. A fixing groove is opened on the fixing plate. A flexible protective curtain is fixed on the inner wall of the fixing groove. A connecting hook is fixed on the side edge of the flexible protective curtain away from the fixing groove. When the limiting half ring is in the limiting state, the fixing plate can rotate in the direction away from the locking ring to a state parallel to the elastic positioning rod. At this time, the fixing plate can slide with the fixing block to a protective state located outside the connection between the first pipe and the second pipe. The two flexible protective curtains on the same limiting half ring can unfold towards each other and make the connecting hooks engage with each other.

[0019] By adopting the above technical solution, the unfolded flexible protective curtain is closed via connecting hooks and covers the outside of the connection between the first and second pipes. This structure effectively prevents dust, sand, and debris from seeping into the pipeline, avoiding internal blockages or valve wear, and ensuring the cleanliness of the transported medium and the system's flow efficiency from the source.

[0020] Optionally, when the two limiting semi-rings are in the receiving state, the fixing plate can rotate and slide with the fixing block to adjust to a state where it abuts against the limiting semi-rings away from the anti-reverse surface. At this time, the flexible protective curtain can be unfolded from the fixed sink to protect the top surface of the limiting semi-rings. The connecting hooks on the two adjacent flexible protective curtains are locked together.

[0021] By adopting the above technical solution, in the temporary support state, the flexible protective curtain unfolds to cover the top surface of the limiting semi-ring and is fixed by connecting hooks. This design, while supporting the end of the pipe, provides full-coverage protection for the contact area between the end and the supporting structure, further preventing bumps and damage to the pipe opening when placed at an angle, and improving the parts protection mechanism throughout the entire life cycle.

[0022] Optionally, a first magnetic block is embedded in the fixing block, and a second magnetic block is embedded in the side of the fixing plate facing the fixing trough; the flexible protective curtain can be stored in the fixing trough when the limiting half ring is transported separately, and the first magnetic block and the second magnetic block can abut and attract each other as the fixing plate rotates.

[0023] By adopting the above technical solution, the flexible protective curtain can be stored in a fixed sink and secured by the attraction of the first and second magnetic blocks. This ensures that the internal precision components and the protective curtain are properly protected when the limiting semi-ring is transported in separate packaging, avoiding damage from compression. It also simplifies the logistics packaging, reduces transportation costs, and lowers the rate of parts damage.

[0024] Optionally, a dovetail slider is fixed on the fixed block, and a dovetail groove is formed on the outer periphery of the elastic positioning rod to slide and engage with the dovetail slider.

[0025] By adopting the above technical solution, the cooperation between the dovetail slider and the dovetail groove provides high-precision linear guidance and limiting, ensuring that the fixed block slides smoothly and without jamming on the elastic positioning rod. This structure ensures the precise execution of the protective curtain's opening and closing actions, avoiding the protective curtain from jamming or failing to close due to sliding deviation, and improving the overall mechanism's operational reliability and service life.

[0026] In summary, this application includes the following beneficial technical effects: In this application, the positioning plate is rotated and misaligned after passing through the clearance notch, and then axially locked with the limiting component, completely eliminating the cumbersome traditional method of tightening flange bolts hole by hole. This design only requires three steps of "insertion-rotation-locking" to complete the rapid connection of pipes with different diameters, greatly shortening the time spent on assembly and disassembly, and significantly improving the efficiency of lining trolley relocation and pipeline restoration. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is an exploded structural diagram illustrating the installation and distribution of the limiting semi-ring and the elastic sealing ring in Embodiment 1 of this application; Figure 3 This is a partial cross-sectional view of Embodiment 1 of this application, illustrating the installation and fit between the limiting semi-ring and the elastic sealing ring. Figure 4 This is a schematic diagram illustrating the installation and fit of the elastic positioning rod in Embodiment 2 of this application; Figure 5 This is an exploded structural diagram illustrating the installation distribution of the elastic positioning rod and the limiting semi-ring in Embodiment 2 of this application; Figure 6 This is a schematic diagram illustrating the installation and cooperation of the two limiting half-rings in Embodiment 2 of this application; Figure 7 This application's embodiment 2 shows an exploded structural diagram illustrating the installation distribution of the elastic positioning rod, fixing block, and fixing plate; Figure 8 This is a schematic diagram illustrating the installation and coordination of the flexible protective curtain in Embodiment 2 of this application; Figure 9 yes Figure 8 An enlarged schematic diagram of part A in the middle; Figure 10 This is a schematic diagram illustrating the installation and cooperation of the flexible protective curtain and the two limiting semi-rings in Embodiment 2 of this application; Figure 11This is a schematic diagram illustrating the installation and cooperation of the flexible protective curtain and the fixing plate in Embodiment 2 of this application; Figure 12 This is a schematic diagram illustrating the installation and cooperation of the first magnetic block and the second magnetic block in Embodiment 2 of this application.

[0028] In the diagram, 1. First pipe; 11. Fixed sleeve; 12. Annular convex plate; 121. Clearance notch; 122. Clearance through hole; 123. Sealing ring groove; 2. Second pipe; 21. Positioning plate; 22. Positioning insert; 3. Limiting component; 31. Limiting half ring; 311. Limiting slot; 312. Anti-reverse surface; 313. Supporting surface; 32. Locking ring; 321. Positioning ring groove; 33. Elastic sealing ring; 4. Elastic positioning rod; 41. Positioning hook; 42. Dovetail slide; 5. Fixed block; 51. Dovetail slider; 52. First magnetic block; 6. Fixed plate; 61. Fixed recess; 62. Second magnetic block; 7. Flexible protective curtain; 71. Connecting hook. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0030] Reference Figure 1 , Figure 2 and Figure 3 A quick pipe connection device includes a first pipe 1 and a second pipe 2 with a cross-section larger than that of the first pipe 1; four positioning plates 21 are uniformly welded and fixed on the outer periphery of the end of the second pipe 2; a fixing sleeve 11 with a cross-section larger than that of the second pipe 2 is welded and fixed on the outer periphery of the end of the first pipe 1; an annular protrusion 12 is integrally formed on the inner edge of the opening away from the first pipe 1; the annular protrusion 12 has a clearance notch 121 for the positioning plates 21 to pass through; and a limiting member 3 is provided on the outer periphery of the second pipe 2. When assembling the first pipe 1 and the second pipe 2, the fixing sleeve 11 is pre-fitted onto the outer periphery of the end of the second pipe 2. At this time, the positioning plate 21 passes through the clearance notch 121. Then, the second pipe 2 is rotated 45 degrees around its own axis. The side of the positioning plate 21 away from the first pipe 1 abuts against the inner side of the annular convex plate 12 (that is, the positioning plate 21 and the clearance notch 121 are misaligned by 45 degrees). Finally, the first pipe 1 and the second pipe 2 are fixed relative to each other by the limiting member 3.

[0031] Reference Figure 2 and Figure 3The limiting component 3 includes two limiting half-rings 31 sleeved on the outer periphery of the second pipe 2 and a locking ring 32 sleeved on the outer periphery of the second pipe 2. A positioning insert 22 is fixed on the side of the positioning plate 21 away from the first pipe 1. A clearance through hole 122 is opened on the annular protrusion 12. The inner wall of the locking ring 32 is provided with an internal thread, and the outer periphery of the second pipe 2 is provided with an external thread that engages with the locking ring 32. The two limiting half-rings 31 are located between the locking ring 32 and the positioning plate 21. A limiting slot 311 is opened on the side of the limiting half-rings 31 facing the positioning plate 21, and the outer diameter of the limiting half-rings 31 decreases along the direction towards the locking ring 32. After the first pipe 1 and the second pipe 2 are initially assembled (that is, the positioning plate 21 and the clearance notch 121 are misaligned by 45 degrees), the positioning insert 22 is inserted into the limiting slot 311 after passing through the clearance through hole 122. Then, the two limiting half rings 31 are placed between the locking ring 32 and the annular convex plate 12. The locking ring 32 is then threaded and adjusted so that the two opposite sides of the two limiting half rings 31 are pressed against the sides of the annular convex plate 12 and the locking ring 32 that are close to each other. At this time, the two limiting half rings 31 are in the limiting state.

[0032] Reference Figure 2 and Figure 3 An elastic sealing ring 33 made of rubber is provided between the annular convex plate 12 and the two limiting half rings 31. A sealing ring groove 123 for the elastic sealing ring 33 to be inserted is provided on the outer edge of the side of the annular convex plate 12 facing the limiting half ring 31. After the first pipe 1 and the second pipe 2 are assembled, the elastic sealing ring 33 is used to enhance the sealing performance at the connection between the annular convex plate 12 and the limiting half ring 31.

[0033] The implementation principle of this application embodiment is as follows: Assembly status: The elastic sealing ring 33 is pre-embedded in the sealing ring groove 123 of the annular convex plate 12, and then the fixing sleeve 11 is put on the end of the second pipe 2 so that the positioning plate 21 passes through the relief notch 121 of the annular convex plate 12. The second pipe 2 is rotated forty-five degrees so that the positioning plate 21 is misaligned with the relief notch 121 and abuts against the inner side of the annular convex plate 12, thus completing the initial positioning.

[0034] At this point, the positioning insert 22 is passed through the clearance through hole 122, and then the two limiting half rings 31 are fastened. The relative positions of the first pipe 1 and the second pipe 2 are then adjusted so that the positioning insert 22 is inserted into the limiting slot 311 on the limiting half ring 31. Then the locking ring 32 is rotated, and its threaded engagement is used to make the two ends of the limiting half ring 31 abut against the annular protrusion 12 and the locking ring 32 respectively, thus achieving fixation. After assembly, the annular protrusion 12 and the limiting half ring 31 are pressed together, which enhances the sealing of the connection and prevents the medium from leaking. Example

[0035] Reference Figure 4The difference between this embodiment and Embodiment 1 is that the two limiting half-rings 31 are rotatably connected to the outer edge of the side of the locking ring 32 that are close to each other and away from the side of the locking ring 32. The elastic positioning rod 4 is a conventional elastic telescopic structure with an internal spring, which will not be described in detail here. The end of the elastic positioning rod 4 is rotatably connected to a positioning hook 41. The positioning hook 41 can be rotated around the axis of the elastic positioning rod 4 for adjustment and fixation. The locking ring 32 has a positioning ring groove 321 on the side away from the limiting half-rings 31. When the limiting half-ring 31 is in the limiting state (that is, when the first pipe 1 and the second pipe 2 are assembled and applied), the positioning hook 41 can be inserted into the positioning ring groove 321 as the elastic positioning rod 4 rotates, thereby using the combination structure of the elastic positioning rod 4 and the elastic hook to enhance the assembly stability of the first pipe 1 and the second pipe 2.

[0036] Reference Figure 5 and Figure 6 When the two limiting half-rings 31 are in the limiting state, the side facing the locking ring 32 is the retraction surface 312, and the side facing each other is the support surface 313. When the first pipe 1 and the second pipe 2 are not assembled (but are about to be assembled), the two limiting half rings 31 are placed on the ground, the two supporting surfaces 313 face the ground, the two anti-reverse surfaces 312 are in contact with each other, the two elastic positioning rods 4 on the same side can rotate to the coaxial state, and the two positioning hooks 41 can be locked together and fixed. At this time, the two limiting half rings 31, the elastic positioning rods 4 and the elastic hooks together constitute a "temporary support structure". At this time, the two limiting half rings 31 are in the state of supporting one end of the first pipe 1 and the second pipe 2. The end of the first pipe 1 facing the fixed sleeve 11 and the end of the second pipe 2 facing the locking ring 32 can be tilted and placed on the top surface of the two limiting half rings 31 to reduce the possibility of damage caused by the corresponding ends hitting the ground.

[0037] Reference Figure 7 , Figure 8 and Figure 9 When the positioning hook 41 is engaged in the positioning ring groove 321, a fixing block 5 is slidably provided on the side away from the limiting half ring 31 of the elastic positioning rod 4. The fixing block 5 can slide back and forth along the length direction of the elastic positioning rod 4. A dovetail slider 51 is fixed on the fixing block 5, and a dovetail groove 42 that slides with the dovetail slider 51 is opened on the outer periphery of the elastic positioning rod 4. A fixing plate 6 is rotatably connected to the side edge of the fixing block 5 away from the elastic positioning rod 4. A fixing groove 61 is opened on the fixing plate 6. A flexible protective curtain 7 is fixed on the inner wall of the fixing groove 61. A connecting hook 71 is fixed on the side edge of the flexible protective curtain 7 away from the fixing groove 61. When the limiting half-ring 31 is in the limiting state (that is, when the first pipe 1 and the second pipe 2 are normally assembled and used), the fixing plate 6 can rotate in a direction away from the locking ring 32 to a state parallel to the elastic positioning rod 4. At this time, the fixing plate 6 can slide with the fixing block 5 to a protective state outside the connection between the first pipe 1 and the second pipe 2. The two flexible protective curtains 7 on the same limiting half-ring 31 can unfold towards each other and the connecting hooks 71 can be engaged with each other. At this time, the flexible protective curtains 7 and the fixing plate 6 are used to physically protect the connection between the first pipe 1 and the second pipe 2, reducing the possibility of external impurities seeping into the interior of the first pipe 1 and the second pipe 2 from the connection.

[0038] Reference Figure 10 and Figure 11 When the two limiting half-rings 31 are in the receiving state, the fixing plate 6 can rotate and slide with the fixing block 5 to adjust to a state where it abuts against the limiting half-rings 31 away from the stop surface 312. At this time, the flexible protective curtain 7 can be unfolded from the fixed sink 61 to protect the top surface of the limiting half-rings 31. The connecting hooks 71 on the two adjacent flexible protective curtains 7 are locked together. At this time, the flexible protective curtain 7 is used to protect the top surface of the limiting half-rings 31 in this state, reducing the possibility of damage caused by the collision between the corresponding ends of the first pipe 1 and the second pipe 2 and the top surface of the limiting half-rings 31.

[0039] Reference Figure 12 The fixing block 5 is equipped with a first magnetic block 52, and the fixing plate 6 is equipped with a second magnetic block 62 on the side facing the fixing groove 61. When the limiting half ring 31 is packaged and transported separately as a part, the flexible protective curtain 7 can be stored in the fixing groove 61. At this time, the first magnetic block 52 and the second magnetic block 62 can abut and attract each other as the fixing plate 6 rotates.

[0040] The implementation principle of this application embodiment is as follows: Individual transport status: First, store the flexible protective curtain 7 in the fixed sink 61, then rotate the fixed plate 6 to make the first magnetic block 52 and the second magnetic block 62 attract each other, so that the limiting half ring 31 can be packaged and transported separately to avoid damage to the flexible protective curtain 7 during transportation.

[0041] Preparatory assembly state: Place the two limiting half-rings 31 with their support surfaces 313 facing down, so that the two anti-reverse surfaces 312 are in contact with each other. Rotate the elastic positioning rod 4 to be coaxial, and the positioning hooks 41 on the two elastic positioning rods 4 on the same side will engage with each other. At this time, the two limiting half-rings 31, the elastic positioning rods 4 and the positioning hooks 41 form a "temporary support structure", which can be tilted to place the pipe end to avoid collision damage. At the same time, unfold the flexible protective curtain 7 to cover the top surface of the limiting half-rings 31 to further protect the pipe end.

[0042] Assembly and application status: After completing the initial positioning of the pipeline according to the steps of Example 1, rotate the elastic positioning rod 4 to engage the positioning hook 41 into the positioning ring groove 321 on the locking ring 32. The elasticity of the elastic positioning rod 4 enhances the assembly stability. Then slide the fixing block 5 and rotate the fixing plate 6 to make the two flexible protective curtains 7 on the same limiting half ring 31 unfold towards each other. The connecting hooks 71 on the two flexible protective curtains 7 engage with each other to protect the connection between the first pipeline 1 and the second pipeline 2 and prevent impurities from seeping in.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick-connect pipe device, comprising a first pipe (1) and a second pipe (2) with a cross-section larger than that of the first pipe (1); characterized in that, Several positioning plates (21) are fixed on the outer periphery of the end of the second pipe (2), and a fixed sleeve (11) with a cross-section larger than that of the second pipe (2) is fixed on the outer periphery of the end of the first pipe (1). An annular protrusion (12) is fixed on the inner edge of the opening of the fixed sleeve (11) away from the first pipe (1). A clearance notch (121) for the positioning plates (21) to pass through is provided on the annular protrusion (12). A limiting element (3) is provided on the outer periphery of the second pipe (2); when the fixing sleeve (11) is fitted on the outer periphery of the end of the second pipe (2), the positioning plate (21) passes through the clearance notch (121). The side of the positioning plate (21) away from the first pipe (1) can abut against the inner side of the annular convex plate (12) and be fixed by the limiting element (3) after the second pipe (2) rotates around its own axis.

2. The quick-connect pipe device according to claim 1, characterized in that, The limiting component (3) includes two limiting half rings (31) sleeved on the outer periphery of the second pipe (2) and a locking ring (32) sleeved on the outer periphery of the second pipe (2). A positioning block (22) is fixed on the side of the positioning plate (21) away from the first pipe (1). A clearance through hole (122) is opened on the annular convex plate (12). The inner wall of the locking ring (32) is provided with an internal thread, and the outer periphery of the second pipe (2) is provided with an external thread that engages with the locking ring (32). Two limiting half-rings (31) are located between the locking ring (32) and the positioning plate (21). Limiting slots (311) are opened on the side of the limiting half-rings (31) facing the positioning plate (21). After the first pipe (1) and the second pipe (2) are assembled, the positioning block (22) passes through the clearance through hole (122) and is inserted into the limiting slot (311). At this time, after the locking ring (32) is threaded and adjusted, the two opposite sides of the limiting half-rings (31) are respectively pressed against the sides of the annular convex plate (12) and the locking ring (32) that are close to each other. The two limiting half-rings (31) are in the limiting state at this time.

3. The quick-connect pipe device according to claim 2, characterized in that, An elastic sealing ring (33) is provided between the annular convex plate (12) and the two limiting half rings (31). The annular convex plate (12) has a sealing ring groove (123) on the outer edge of the side facing the limiting half ring (31) for the elastic sealing ring (33) to be embedded.

4. A quick pipe connection device according to claim 2, characterized in that, The outer diameter of the limiting half-ring (31) decreases in the direction toward the locking ring (32).

5. A quick pipe connection device according to claim 4, characterized in that, The two limiting half-rings (31) are rotatably connected to an elastic positioning rod (4) with elastic shortening performance at the outer edge of the side of the locking ring (32) that is close to each other and far away from the locking ring (32); The end of the elastic positioning rod (4) is rotatably connected to a positioning hook (41), and the locking ring (32) has a positioning ring groove (321) on the side away from the limiting half ring (31); the positioning hook (41) can be inserted into the positioning ring groove (321) when the limiting half ring (31) is in the limiting state.

6. A quick pipe connection device according to claim 5, characterized in that, When the two limiting half rings (31) are in the limiting state, the side facing the locking ring (32) is the retraction surface (312), and the side facing each other is the support surface (313). When the first pipe (1) and the second pipe (2) are not assembled, the two limiting half rings (31) are placed on the ground. The two supporting surfaces (313) face the ground at this time, the two anti-reverse surfaces (312) are in contact with each other, the two elastic positioning rods (4) on the same side can rotate to the coaxial state, the two positioning hooks (41) can be locked and fixed to each other, and the two limiting half rings (31) are in the receiving state of supporting one end of the first pipe (1) and the second pipe (2).

7. A quick pipe connection device according to claim 6, characterized in that, When the positioning hook (41) is engaged in the positioning ring groove (321), a fixing block (5) is slidably provided on the side away from the limiting half ring (31) of the elastic positioning rod (4). The fixing block (5) can slide back and forth along the length direction of the elastic positioning rod (4). A fixing plate (6) is rotatably connected to the side edge of the fixing block (5) away from the elastic positioning rod (4). A fixing groove (61) is provided on the fixing plate (6). A flexible protective curtain (7) is fixed on the inner wall of the fixing groove (61). A connecting hook (71) is fixed on the side edge of the flexible protective curtain (7) away from the fixing groove (61). When the limiting half ring (31) is in the limiting state, the fixing plate (6) can rotate in a direction away from the locking ring (32) to a state parallel to the elastic positioning rod (4). At this time, the fixing plate (6) can slide with the fixing block (5) to a protective state outside the junction of the first pipe (1) and the second pipe (2). The two flexible protective curtains (7) on the same limiting half ring (31) can unfold towards each other and make the connecting hooks (71) engage with each other.

8. A quick pipe connection device according to claim 7, characterized in that, When the two limiting half-rings (31) are in the receiving state, the fixing plate (6) can rotate and slide with the fixing block (5) to adjust to a state where it abuts against the limiting half-ring (31) away from the stop surface (312). At this time, the flexible protective curtain (7) can be unfolded from the fixed sink (61) to protect the top surface of the limiting half-ring (31). The connecting hooks (71) on the two adjacent flexible protective curtains (7) are locked together.

9. A quick-connect pipe device according to claim 7, characterized in that, The fixing block (5) is embedded with a first magnetic block (52), and the fixing plate (6) is embedded with a second magnetic block (62) on the side facing the fixing groove (61). The flexible protective curtain (7) can be stored in the fixing groove (61) when the limiting half ring (31) is transported alone. The first magnetic block (52) and the second magnetic block (62) can abut and attract each other as the fixing plate (6) rotates.

10. A quick-connect pipe device according to claim 7, characterized in that, The fixed block (5) is fixed with a dovetail slider (51), and the elastic positioning rod (4) has a dovetail groove (42) on its outer periphery that slides with the dovetail slider (51).

Images