Pipe joint assembly and corrugated pipe

Abstract

The invention discloses a pipe joint assembly and a corrugated pipe, and belongs to the field of pipe joints. The pipe joint assembly and the corrugated pipe comprise an end plate and a corrugated pipe body, a first horizontal section is arranged on the side, close to an outer ring, of the end plate, and a plurality of positioning assemblies are evenly arranged on the first horizontal section; the positioning assembly comprises a pressing block, the pressing block moves between the first horizontal section and the outer wall of the corrugated pipe body, and the pressing block and the wave trough of the corrugated pipe body can form mechanical interlocking; a locking assembly is arranged on the first horizontal section and used for limiting the pressing block to be separated from the wave trough of the corrugated pipe body during locking and allowing the pressing block to be separated from the wave trough of the corrugated pipe body after unlocking. The pressing block can be driven to be clamped into the wave trough in the radial direction by rotating the sleeve, one-key type locking and dismounting are achieved, locking is reliable, meanwhile, rapid mounting and dismounting are convenient, operation is convenient and fast, and the mounting efficiency is improved; and when the corrugated pipe bodies are connected, the sealing rings and the first sealing gaskets form a double-way sealing structure, so that good sealing performance after the corrugated pipe bodies are connected is ensured, and the connecting effect is good.

Description

Technical Field

[0001] The present invention relates to the field of pipe joints, and in particular to a pipe joint assembly and a corrugated pipe. Background Art

[0002] Bellows are elastic tubular components that achieve axial and radial expansion and contraction through corrugated folds. They are widely used in pressure measurement, pipe connection, and vibration compensation. Bellows consist of multiple transverse corrugations and can be categorized by material, including metal bellows (such as stainless steel and brass), plastic bellows (such as PVC and PE), and welded bellows. Metal bellows are commonly used in applications involving high-temperature and corrosive media, while plastic bellows are more suitable for low-pressure fluid transportation.

[0003] Pipe fittings are key components used for connection in piping systems. They serve as the connecting tool between pipes, play an indispensable role in pipe fittings, and are one of the main components of pipelines. In industrial piping systems, the connection reliability, sealing performance, and installation efficiency of pipe fittings directly impact the safety and maintenance costs of fluid transportation.

[0004] A Chinese patent application, numbered 202410223820.0, discloses a pipe joint assembly and a bellows. During installation, the rotating rod is provided with threaded fastening holes along its length, and fastening bolts are threaded into the threaded fastening holes along the pipe axis. During installation, the fastening bolts are continuously rotated to gradually bring the two pipe joint connectors closer together and mate. A clamp is then installed and bolted together to complete the pipe interface connection.

[0005] However, when connecting the pipe body, the above patent requires first rotating multiple fastening bolts to achieve axial docking, and then installing the clamps to lock it. The operation is complicated and the installation efficiency is low. Moreover, this cumbersome connection method has the problem of inconvenient maintenance and disassembly. The bolts and clamps need to be completely loosened, and quick disconnection cannot be achieved. In some frequent disassembly and assembly scenarios or emergency repair scenarios, the risk of delay is high and maintenance is not convenient enough. Summary of the Invention

[0006] The present invention provides a pipe joint assembly and a bellows, which can solve the problems of the pipe joint assembly and the bellows in the prior art, such as complex operation, low installation efficiency, and inconvenient maintenance and disassembly.

[0007] A pipe joint assembly includes an end plate and a corrugated pipe body, wherein a first horizontal section is provided on a side of the end plate close to an outer ring, and a plurality of positioning assemblies are evenly arranged on the first horizontal section; The positioning assembly includes a pressing block, which moves between the first horizontal section and the outer wall of the corrugated tube body, and the pressing block can form a mechanical interlock with the trough of the corrugated tube body; A locking assembly is provided on the first horizontal section, and the locking assembly is used to limit the separation of the pressing block from the trough of the corrugated tube body when locked, and to allow the pressing block to separate from the trough of the corrugated tube body after unlocking.

[0008] Preferably, the positioning assembly further comprises a connecting rod slidably connected to the first horizontal section and a limiting plate fixed to one end of the connecting rod, and the pressing block is fixed to the other end of the connecting rod.

[0009] Preferably, the locking assembly includes a sleeve sleeved on the first horizontal section and a first inclined portion provided on the sleeve, the outer surface of the first horizontal section and the inner surface of the sleeve are provided with threaded structures that cooperate with each other, and the first inclined portion tends to move the connecting rod and the pressure block close to the trough of the corrugated tube body.

[0010] Preferably, each of the limit plates is mounted with a ball bearing, and the locking assembly further comprises a horizontal portion disposed adjacent to the first inclined portion, and the ball bearing is in rolling connection with the horizontal portion.

[0011] Preferably, a second horizontal section is provided on one side of the end plate close to the inner ring, and the second horizontal section of the bellows body is slidably connected to the inner wall of the bellows body.

[0012] Preferably, a sealing ring is fixedly provided on the second horizontal section, and the sealing ring fills the concave area of ​​the inner wall of the corrugated tube body.

[0013] Preferably, a first sealing gasket is fixedly provided on one side of the end plate close to the end wall of the corrugated tube body.

[0014] Preferably, a flange is fixedly provided on the end plate, and a second sealing gasket is provided on one side of the flange.

[0015] Preferably, both ends of each pressing block are provided with a second inclined portion.

[0016] A bellows, wherein the bellows body is made of metal.

[0017] The present invention provides a pipe joint assembly and a bellows, which have the following beneficial effects: 1. When the bellows are docked, they are inserted into the end plate. The rotating sleeve uses its threaded structure to push the sleeve axially. The first inclined portion cooperates with the connecting rod, forcing the connecting rod to drive the pressure block to move inward. The pressure block is stuck in the groove of the trough to achieve self-locking, and the pipeline docking can be completed. When it is necessary to unlock the pressure block, rotate the sleeve in the opposite direction, the first inclined portion releases the pressure, and the connecting rod and the pressure block are in a free state. The bellows body can be withdrawn to complete the disassembly. The connection of the bellows body only requires rotating the sleeve to drive the pressure block to radially snap into the trough, realizing one-button locking and disassembly. It is reliable in locking and easy to install and disassemble quickly, which is convenient to operate and improves installation efficiency.

[0018] 2. When the bellows is inserted into the end plate, the second horizontal section engages with the inner wall of the bellows, and the sealing ring fills the concave area of ​​the inner wall of the bellows to form a primary sealing barrier. The first sealing gasket on the end plate is used to form a secondary sealing barrier to ensure good sealing after the bellows are connected. At the same time, the second horizontal section plays a supporting role, enhancing the strength and structural stability of the connection of the bellows. When the pressure block applies pressure to the trough for mechanical locking, the second horizontal section generates a reverse support force to prevent the trough from being compressed and deformed and affecting the mechanical locking effect, thereby ensuring the stability of the bellows connection.

[0019] 3. A flange is set on the end plate, which can not only realize the connection between the two end plates, but also facilitate the docking of the two corrugated pipe bodies through the pipe joint assembly, but also can be connected to the flange of the external pipeline through the flange, so that a single corrugated pipe body can be connected to the external pipeline through the pipe joint assembly, which is flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the connection structure of a pipe joint assembly and two bellows bodies of a bellows provided by the present invention; Figure 2 A schematic diagram of the connection structure of a pipe joint assembly and a single bellows body of a bellows provided by the present invention; Figure 3 The present invention provides a pipe joint assembly and a bellows Figure 2 Schematic diagram of cross-section structure; Figure 4 The present invention provides a pipe joint assembly and a bellows Figure 3 A in the middle is an enlarged structural diagram; Figure 5 The present invention provides a pipe joint assembly and a bellows Figure 4 Enlarged structural diagram at point B in the middle.

[0021] Description of reference numerals: 1. End plate; 2. First horizontal section; 3. Positioning assembly; 301. Connecting rod; 302. Pressure block; 303. Limiting plate; 4. Locking assembly; 401. Sleeve; 402. First inclined portion; 403. Horizontal portion; 5. Second horizontal section; 6. Sealing ring; 7. First sealing gasket; 8. Bellows body; 9. Flange; 10. Second sealing gasket; 11. Ball; 12. Second inclined portion; 13. Nut. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0023] like Figures 1 to 5As shown, an embodiment of the present invention provides a pipe joint assembly, including an end plate 1 and a bellows body 8. A first horizontal section 2 is provided on the side of the end plate 1 close to the outer ring. A plurality of positioning assemblies 3 are evenly provided on the first horizontal section 2. The positioning assemblies 3 are arranged in a circular array and distributed on the first horizontal section 2. To ensure a stable positioning effect, the number of positioning assemblies 3 is maintained at four groups. The positioning assembly 3 includes a connecting rod 301 slidably connected to the first horizontal section 2, a limiting plate 303 fixed to one end of the connecting rod 301, and a pressure block 302 fixed to the other end of the connecting rod 301. The limiting plate 303 is used to limit the connecting rod 301 to prevent it from loosening. The pressure block 302 moves between the first horizontal section 2 and the outer wall of the bellows body 8. The pressure block 302 can form a mechanical interlock with the trough of the bellows body 8. A locking assembly 4 is provided on the first horizontal section 2 , which is used to limit the separation of the pressing block 302 from the trough of the corrugated tube body 8 when locked, and to allow the separation of the pressing block 302 from the trough of the corrugated tube body 8 after unlocking.

[0024] Locking assembly 4 controls the movement of connecting rod 301, driving pressure block 302 inward. When sleeve 401 rotates to the end point, pressure block 302 engages the inner groove of the trough, achieving self-locking. Pressure block 302 engages with the trough of bellows body 8 to lock, thus locking bellows body 8 and end plate 1, completing the pipeline connection.

[0025] At the same time, the pressure block 302 and the bellows body 8 are movable together. After the locking assembly 4 is unlocked, the connecting rod 301 and the pressure block 302 are in an active unlocked state, and the bellows body 8 and the end plate 1 can be separated and disassembled, realizing one-button locking and disassembly. While the locking is reliable, it is easy to install and disassemble quickly and the operation is convenient.

[0026] In some specific embodiments, such as Figure 4 and Figure 5 As shown, the locking assembly 4 includes a sleeve 401 sleeved on the first horizontal section 2 and a first inclined portion 402 provided on the sleeve 401. The outer surface of the first horizontal section 2 and the inner surface of the sleeve 401 are provided with threaded structures that cooperate with each other. The first inclined portion 402 tends to move the connecting rod 301 and the pressure block 302 close to the trough of the corrugated tube body 8. A nut 13 is provided on the sleeve 401 to facilitate the operation of rotating the sleeve 401 for screwing. At the same time, the sleeve 401 can also be tightened with an external tool according to usage requirements to achieve a tighter thread screwing.

[0027] The bellows body 8 is inserted into the end plate 1, and the sleeve 401 is rotated, and its internal thread engages with the external thread of the first horizontal section 2, pushing the sleeve 401 to move axially. At this time, the first inclined surface 402 cooperates with the connecting rod 301, forcing the connecting rod 301 to drive the pressure block 302 to move inward.

[0028] When the pressing block 302 needs to be unlocked, the sleeve 401 is rotated in the opposite direction, the first inclined portion 402 releases the pressure, and the connecting rod 301 and the pressing block 302 are in a free movable state, which facilitates the withdrawal of the bellows body 8.

[0029] In some specific embodiments, such as Figure 5 As shown, a ball 11 is installed on each limit plate 303, and the locking assembly 4 also includes a horizontal portion 403 arranged adjacent to the first inclined portion 402. The planar structure of the horizontal portion 403 better presses the ball 11, and the ball 11 is connected to the horizontal portion 403 in a rolling manner.

[0030] When the sleeve 401 rotates, the first inclined portion 402 and the horizontal portion 403 cooperate with the ball 11, and the ball 11 reduces the contact friction resistance of the locking assembly 4 during rotation, so that the rotating sleeve 401 and the connecting rod 301 can move more smoothly and flexibly.

[0031] In some specific embodiments, such as Figure 3 and Figure 4 As shown, a second horizontal section 5 is provided on the side of the end plate 1 close to the inner ring. The second horizontal section 5 of the bellows body 8 is slidably connected to the inner wall of the bellows body 8. A sealing ring 6 is fixed on the second horizontal section 5. The sealing ring 6 fills the concave area of ​​the inner wall of the bellows body 8 (the area opposite to the corrugated protrusion).

[0032] The second horizontal section 5 is plugged into the inner wall of the bellows body 8, and the sealing ring 6 is filled in the inner wall concave area of ​​the bellows body 8 to form a primary sealing barrier. The shape of the sealing ring 6 is adapted to the shape of the inner wall concave area of ​​the bellows body 8, so that it fits more closely to the inner wall of the tube for sealing. In order to ensure a good sealing effect, the number of sealing rings 6 can be set accordingly according to the number of inner wall concave areas covered by the second horizontal section 5 to improve the sealing effect. At the same time, the second horizontal section 5 can play a supporting role and enhance the strength and structural stability of the connection of the bellows body 8. When the pressure block 302 applies pressure to the trough for mechanical locking, a reverse supporting force is generated by the second horizontal section 5 to prevent the trough from being compressed and deformed and affecting the mechanical locking effect. In addition, the extended length of the second horizontal section 5 ensures that the pressure area of ​​the pressure block 302 is covered to ensure a reverse supporting effect.

[0033] In some specific embodiments, such as Figure 2 、 Figure 3 and Figure 4 As shown, a first sealing gasket 7 is fixedly provided on one side of the end plate 1 near the end wall of the bellows body 8, which is used to form a second sealing barrier to ensure good sealing after the bellows body 8 is connected. A flange 9 is fixedly provided on the end plate 1, and a second sealing gasket 10 is provided on one side of the flange 9 to seal the connection of the flange 9.

[0034] The flange 9 on the end plate 1 can not only realize the connection between the two end plates 1, facilitating the docking between the two corrugated pipe bodies 8 through the pipe joint assembly, but also can be connected to the flange of the external pipeline through the flange 9, facilitating the connection of a single corrugated pipe body 8 with the external pipeline through the pipe joint assembly, and is flexible to use.

[0035] In some specific embodiments, such as Figure 4 and Figure 5 As shown, each pressing block 302 is provided with a second inclined portion 12 at both ends, and the second inclined portion 12 contacts and slides with the corrugated surface. When the pressing block 302 moves in the trough area, the second inclined portion 12 of the pressing block 302 on the side close to the end plate 1 contacts the corrugation. The guiding effect of the second inclined portion 12 can push the bellows body 8 toward the side of the end plate 1, and the compression and deformation of the first sealing gasket 7 can better seal the connection. Furthermore, when the bellows body 8 is withdrawn and removed from the interior of the end plate 1, the guiding effect of the second inclined portion 12 pushes the pressing block 302 to move freely, ensuring that the bellows body 8 can be pushed out and removed.

[0036] When the bellows 8 is inserted into the end plate 1, the second inclined surface 12 of the pressing block 302 on the side away from the end plate 1 contacts the corrugations. As the bellows 8 advances, the guiding effect of the second inclined surface 12 can push the pressing block 302 outward, ensuring that the bellows 8 is smoothly inserted between the first horizontal section 2 and the second horizontal section 5. The area between the first horizontal section 2 and the bellows 8 is primarily used for the movement of the pressing block 302. The distance between the first horizontal section 2 and the highest point of the corrugations must be greater than the thickness of the pressing block 302 to ensure that when the bellows 8 is inserted between the first horizontal section 2 and the second horizontal section 5, the pressing block 302 can move freely without blocking the insertion of the bellows 8.

[0037] A bellows, wherein the bellows body 8 is made of metal, such as conventional stainless steel or carbon steel. The bellows consists of a series of continuous corrugations (ridges) and troughs (depressions), with troughs being the recessed areas between adjacent corrugations. To ensure the stability of the connection between the pipe fitting assembly and the bellows, the corrugations on the bellows body 8 are arranged in a vertically horizontal position. The bellows body 8 is preferably a hard metal bellows, and the hard tube can be made of the more rigid 316 stainless steel.

[0038] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in conjunction with specific application scenarios: Bellows 8 is inserted into end plate 1, between first horizontal section 2 and second horizontal section 5. Second horizontal section 5 engages with the inner wall of bellows 8. Sealing ring 6 fills the concave area of ​​the inner wall of bellows 8, forming a primary sealing barrier. First sealing gasket 7 on end plate 1 forms a secondary sealing barrier, ensuring good sealing after bellows 8 is connected. Second horizontal section 5 also provides support, enhancing the strength and structural stability of the connection of bellows 8.

[0039] Rotating sleeve 401 engages its internal threads with the external threads of first horizontal section 2, pushing sleeve 401 axially. At this point, first beveled portion 402 engages connecting rod 301, forcing connecting rod 301 to drive pressing block 302 inward. When sleeve 401 reaches its final rotation point, pressing block 302 engages within the trough groove, achieving self-locking. Pressing block 302 engages with the trough of bellows body 8 to lock, securing bellows body 8 to end plate 1 and completing the pipeline connection.

[0040] When the pressing block 302 needs to be unlocked, the sleeve 401 is rotated in the opposite direction, the first inclined portion 402 releases the pressure, and the connecting rod 301 and the pressing block 302 are in a free movable state, and the bellows body 8 can be withdrawn to complete the disassembly work.

[0041] The connection of the bellows body 8 only requires rotating the sleeve 401 to drive the pressure block 302 to radially snap into the trough, achieving one-touch locking and disassembly. While locking is reliable, it is easy to install and disassemble quickly, easy to operate, and improves installation efficiency.

[0042] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A pipe joint assembly, comprising an end plate (1) and a corrugated pipe body (8), characterized in that: A first horizontal section (2) is provided on one side of the end plate (1) close to the outer ring, and a plurality of positioning components (3) are evenly arranged on the first horizontal section (2); The positioning assembly (3) includes a pressing block (302), the pressing block (302) being movable between the first horizontal section (2) and the outer wall of the corrugated tube body (8), and the pressing block (302) being capable of forming a mechanical interlock with the trough of the corrugated tube body (8); A locking assembly (4) is provided on the first horizontal section (2), and the locking assembly (4) is used to limit the separation of the pressing block (302) from the trough of the corrugated tube body (8) when locked, and to allow the separation of the pressing block (302) from the trough of the corrugated tube body (8) when unlocked.

2. A pipe joint assembly according to claim 1, characterized in that: The positioning assembly (3) further comprises a connecting rod (301) slidably connected to the first horizontal section (2) and a limiting plate (303) fixed to one end of the connecting rod (301), and the pressing block (302) is fixed to the other end of the connecting rod (301).

3. A pipe joint assembly according to claim 2, characterized in that: The locking assembly (4) comprises a sleeve (401) sleeved on the first horizontal section (2) and a first inclined portion (402) provided on the sleeve (401); the outer surface of the first horizontal section (2) and the inner surface of the sleeve (401) are both provided with threaded structures that cooperate with each other; the first inclined portion (402) tends to move the connecting rod (301) and the pressure block (302) closer to the trough of the corrugated tube body (8).

4. A pipe joint assembly according to claim 3, characterized in that: A ball (11) is mounted on each of the limiting plates (303), and the locking assembly (4) further comprises a horizontal portion (403) disposed adjacent to the first inclined portion (402), and the ball (11) is in rolling connection with the horizontal portion (403).

5. The pipe joint assembly according to claim 1, wherein: A second horizontal section (5) is provided on one side of the end plate (1) close to the inner ring, and the second horizontal section (5) of the bellows body (8) is slidably connected to the inner wall of the bellows body (8).

6. A pipe joint assembly according to claim 5, characterized in that: A sealing ring (6) is fixedly provided on the second horizontal section (5), and the sealing ring (6) is filled in the inner wall concave area of ​​the corrugated tube body (8).

7. A pipe joint assembly according to claim 6, characterized in that: A first sealing gasket (7) is fixedly provided on one side of the end plate (1) close to the end wall of the bellows body (8).

8. The pipe joint assembly according to claim 1, wherein: A flange (9) is fixedly provided on the end plate (1), and a second sealing gasket (10) is provided on one side of the flange (9).

9. The pipe joint assembly according to claim 4, wherein: Each of the pressing blocks (302) is provided with a second inclined portion (12) at both ends.

10. A corrugated pipe, characterized in that: The pipe joint assembly comprises the pipe joint assembly according to any one of claims 1 to 9, wherein the bellows body (8) is made of metal.

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