Pipeline connector

Abstract

A pipeline connector comprises a connecting sleeve, a pressing ring and a pressing sleeve which are sequentially arranged on the pipe end section of a to-be-connected pipeline in a sleeving mode in the pipe length direction, a connecting flange at one end of the connecting sleeve is located at the pipe end of the to-be-connected pipeline, a stepped hole is formed in the other end of the connecting sleeve, and one end of the pressing ring is located at an orifice of the stepped hole. The sealing ring is arranged in an annular cavity defined by the stepped hole of the connecting sleeve, the outer wall of the to-be-connected pipeline and the end face of the pressing ring, and a locking ring is arranged in an annular cavity defined by the pressing sleeve, the outer wall of the to-be-connected pipeline and the end face of the pressing ring. The pressing sleeve and the pressing ring are connected through a first bolt to form an anti-disengaging assembly, then the pressing ring and / or the pressing sleeve in the anti-disengaging assembly are / is connected with the connecting sleeve through a second bolt, and the first bolt and the second bolt are arranged in a staggered mode in the circumferential direction. The pre-tightening adjustment of the locking ring and the pre-tightening adjustment of the sealing ring are independently completed, the pressing ring and the pressing sleeve do not move back to back, the locking ring can be effectively pre-tightened on the outer pipe wall of a to-be-connected pipeline, and the anti-disengaging and sealing reliability of the pipeline connector is guaranteed.

Description

Technical Field

[0001] The utility model patent relates to a pipeline connecting piece, specifically to a pipeline connector. Background Art

[0002] During pipeline laying or maintenance, it is usually necessary to connect the pipelines. Welding or flange connection is often used to connect pipelines with larger diameters. For bare pipes where welding is inconvenient, adding a flange to the end of the bare pipe is a good option.

[0003] The name is "cast pipe anti-dropout structure" (document number CN206918470U, hereinafter referred to as document 1) discloses that pipe A and inserting pipe are connected in an inserting manner, a gasket is placed between pipe A and inserting pipe, the inserting pipe and the gland are plug-in flexibly connected, and the inserting pipe and the anti-dropout ring are fixedly connected, the flange on pipe A and the gland and the anti-dropout ring are all fixedly connected by bolts and nuts, the conical surface of pipe A and the gasket, the outer surface of the inserting pipe and the inner ring surface of the gasket, the gland and the outer end surface of the gasket are all connected in an extrusion manner, which is used for cast pipe anti-dropout and plugging;

[0004] The technical solution disclosed in the name of "Anti-slip pipe joint" (document number CN216715490U, hereinafter referred to as Document 2) includes a joint body, a connecting flange and a gland. The joint body, the connecting flange and the gland have a first perforation, a second perforation and a third perforation in sequence. The joint body is provided with a countersunk hole, a sealing ring is arranged in the countersunk hole, the inner side wall of the third perforation has an inclined guide surface, and an anti-slip ring is arranged in the third perforation. The joint body and the connecting flange, and the connecting flange and the gland are fixedly connected by bolt connection structures. The bolt connection structure between the joint body and the connecting flange and between the connecting flange and the gland can be the same bolt connection structure or different bolt connection structures;

[0005] The technical solution disclosed in the title "Anti-slip connector for pipe connection" (document number CN113154155A, hereinafter referred to as document 3) includes a first gland, a second gland, a sealing ring, an anti-slip locking ring and a body for inserting a pipe; the first gland and the second gland are respectively in the shape of a collar, the outer periphery of the first gland is provided with a first flange, and the outer periphery of the second gland is provided with a second flange; a sealing ring accommodating portion is formed at the pipe insertion end of the body, and a third flange is provided on the outer side of the sealing ring accommodating portion; the first flange, the second flange and the third flange are connected by a bolt assembly, the sealing ring is provided in the sealing ring accommodating portion and can be sealed with the outer peripheral surface of the pipe after being pressed by the first gland, the anti-slip locking ring is accommodated between the first gland and the second gland, and can be locked to the outer peripheral surface of the pipe after being pressed by the second gland;

[0006] The name "Pipeline Anti-disconnect Connector" (document number CN216643394U, hereinafter referred to as Document 4) is the applicant's prior application document, including a connecting sleeve and a pressing sleeve mounted on the pipe to be connected, the connecting sleeve and the pressing sleeve constitute a connection fit that limits the axial separation of the two, a locking ring and an elastic sealing ring are mounted on the pipe to be connected at the connection between the pressing sleeve and the connecting sleeve, when the pressing sleeve and the connecting sleeve are moved close to each other, the locking ring and the elastic sealing ring constitute mutual axial extrusion fit and radial deformation, the end of the connecting sleeve away from the pressing sleeve is connected to the pipe connector or pipe component, a pressing ring mounted on the pipe to be connected is arranged between the locking ring and the elastic sealing ring, the two ends of the pressing ring are respectively abutted against the locking ring and the elastic sealing ring, the connecting sleeve and the pressing sleeve are connected by a screw, the pressing ring is connected to the screw and constitutes an axial limit, and locking nuts are arranged on the opposite sides of the connecting sleeve and the pressing sleeve.

[0007] In the prior art solution, a bolt is used to connect the connecting sleeve, the pressure ring and the pressure sleeve in sequence, that is, the same bolt connects the three together; the above-mentioned prior art solution has a common defect that the pre-tightening adjustment of the sealing ring and the pre-tightening adjustment of the locking ring cannot be completed independently, resulting in mutual interference between the pre-tightening adjustment of the sealing ring and the pre-tightening adjustment of the locking ring, that is, when adjusting the pre-tightening degree of the sealing ring, the pre-tightening amount of the locking ring that has been adjusted to a suitable anti-slip degree will be destroyed, and vice versa. Summary of the invention

[0008] The utility model provides a pipeline connector, in which the pre-tightening adjustment of a sealing ring and the pre-tightening adjustment of a locking ring are completed independently of each other to ensure the reliability of sealing and anti-slip properties.

[0009] In order to achieve the above-mentioned purpose, the technical scheme adopted is: a pipeline connector, comprising a connecting sleeve, a pressure ring and a pressing sleeve which are sequentially sleeved on the pipe end section of the pipe to be connected along the pipe length direction, the connecting flange at one end of the connecting sleeve is located at the pipe end of the pipe to be connected, the other end of the connecting sleeve is a step hole and one end of the pressure ring is located at the orifice of the step hole, the sealing ring is placed in an annular cavity surrounded by the step hole of the connecting sleeve, the outer wall of the pipe to be connected and the end face of the pressure ring, a locking ring is arranged in an annular cavity surrounded by the pressure sleeve, the outer wall of the pipe to be connected and the end face of the pressure ring, the pressure sleeve and the pressure ring are connected by a first bolt to form an anti-slip assembly, and the pressure ring and / or the pressure sleeve in the anti-slip assembly are connected to the connecting sleeve by a second bolt, and the first bolt and the second bolt are circumferentially staggered with each other.

[0010] Compared with the prior art, the technical effect of the utility model is as follows: when assembling the pipe connector with the pipe to be connected, the pressure ring and the pressure sleeve are first connected by a first bolt to form an anti-dropping component to hold the pipe to be connected, and then the pressure ring and / or the pressure sleeve are connected to the connecting sleeve by a second bolt. The pre-tightening adjustment of the locking ring and the pre-tightening adjustment of the sealing ring are completed independently of each other. The pressure ring and the pressure sleeve will not be displaced back to back. The locking ring can be effectively pre-tightened on the outer pipe wall of the pipe to be connected, thereby ensuring the reliability of the anti-dropping and sealing of the pipe connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional appearance schematic diagram of the first embodiment of the connection method of the connecting sleeve, the pressing ring and the pressing sleeve;

[0012] Figure 2 It is a cross-sectional view of the first embodiment of the connection method of the connecting sleeve, the pressing ring and the pressing sleeve;

[0013] Figure 3 It is a three-dimensional appearance schematic diagram of the second embodiment of the connection method of the connecting sleeve, the pressing ring and the pressing sleeve;

[0014] Figure 4 It is a cross-sectional view of a second embodiment of the connection method of the connecting sleeve, the pressing ring and the pressing sleeve;

[0015] Figure 5 It is a three-dimensional appearance schematic diagram of the third embodiment of the connection method of the connecting sleeve, the pressing ring and the pressing sleeve;

[0016] Figure 6 Schematic diagram of the pressure ring. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-6 And related content, the utility model is further described in detail:

[0018] A pipe connector comprises a connecting sleeve 10, a pressing ring 50 and a pressing sleeve 20 which are sequentially sleeved on the pipe end section of a pipe A to be connected along the pipe length direction, a connecting flange 12 at one end of the connecting sleeve 10 is located at the pipe end of the pipe A to be connected, the other end of the connecting sleeve 10 is a step hole and one end of the pressing ring 50 is located at the orifice of the step hole, a sealing ring 40 is placed in an annular cavity surrounded by the step hole of the connecting sleeve 10, the outer wall of the pipe A to be connected and the end face of the pressing ring 50, a locking ring 30 is arranged in an annular cavity surrounded by the pressing sleeve 20, the outer wall of the pipe A to be connected and the end face of the pressing ring 50, and the characteristic is that: the pressing sleeve 20 and the pressing ring 50 are connected by a first bolt 60 to form an anti-slip assembly, and the pressing ring 50 and / or the pressing sleeve 20 in the anti-slip assembly are connected to the connecting sleeve 10 by a second bolt 70, and the first bolt 60 and the second bolt 70 are arranged circumferentially staggered with each other.

[0019] In the above scheme, when assembling the pipe connector with the pipe A to be connected, the pressing sleeve 20, the pressing ring 50 and the connecting sleeve 10 are sequentially sleeved on the pipe end section from the pipe end of the pipe A to be connected, and the pressing ring 50 is located between the pressing sleeve 20 and the connecting sleeve 10. In the first step, the pressing ring 50 and the pressing sleeve 20 are connected by the first bolt 60 to form an anti-detachment assembly, so that the pressing ring 50 presses against the locking ring 30 in the tapered hole inside the pressing sleeve 20, and the locking ring 30 is effectively clamped on the pipe A to be connected to prevent the pipe connector from being naturally separated from the pipe A to be connected; then the pressing ring 50 and / or the pressing sleeve 20 are connected to the connecting sleeve 10 by the second bolt 70, and the pressing ring 50 presses against the sealing ring 40 in the step hole of the connecting sleeve 10, so that the sealing ring is radially deformed to form a sealing match with the outer pipe wall of the pipe A to be connected, thereby completing the connection and fixing operation between the pipe connector and the pipe A to be connected. Among them, the pre-tightening adjustment of the locking ring 30 and the pre-tightening adjustment of the sealing ring 40 are completed independently of each other, the pressure ring 50 and the pressing sleeve 20 will not be displaced back to back, and the locking ring 30 can be effectively clamped on the outer pipe wall of the pipe A to be connected, ensuring the reliability of the anti-detachment and sealing of the pipe connector.

[0020] Furthermore, in order to facilitate the interconnection of the connecting sleeve 10, the pressing sleeve 20 and the pressing ring 50, annular connecting sleeve connecting ears 11, pressing sleeve connecting ears 21 and pressing ring connecting ears 51 are arranged at circumferential intervals on the outer circumferential surfaces of the connecting sleeve 10, the pressing sleeve 20 and the pressing ring 50, respectively, and the first bolt 60 is inserted into the connecting holes of the pressing sleeve connecting ears 21 and the pressing ring connecting ears 51 corresponding to the circumferential position, and the second bolt 70 is inserted into the connecting holes of the pressing ring connecting ears 51 and / or the pressing sleeve connecting ears 21 and the connecting sleeve connecting ears 11 corresponding to the circumferential position.

[0021] As a preferred solution, a nut is connected to the threaded end of the first bolt 60 to form a connection cooperation that limits the separation of the pressing sleeve 20 and the pressing ring 50, and a nut is connected to the threaded end of the second bolt 70 to form a connection cooperation that limits the separation of the assembly composed of the pressing ring 50 and the pressing sleeve 20 and the connecting sleeve 10. The bolt heads on the first bolt 60 and the second bolt 70 cooperate with the corresponding nuts, thereby limiting the separation of the pressing ring 50 and the pressing sleeve 20, the connecting sleeve 10 and the pressing ring 50 and / or the pressing sleeve 20, and ensuring that the sealing ring 40 is pre-tightened under the effective pre-tightening state of the locking ring 30.

[0022] In addition, in the present embodiment, among the connecting sleeve connecting ear 11, the pressing sleeve connecting ear 21 and the pressing ring connecting ear 51, at least one of the connecting holes on the pressing sleeve connecting ear 21 and the pressing ring connecting ear 51 is a plain hole, and the other connecting holes are threaded holes or plain holes. Depending on the location and number of the plain holes and the direction in which the bolts are inserted, the connection methods among the connecting sleeve 10, the pressing ring 50 and the pressing sleeve 20 are also different.

[0023] Considering that if the connection holes on the two connecting ears to be connected are both threaded holes, the two cannot be effectively connected by bolts, the following further describes two special connection situations in which the connection hole on the connecting sleeve connecting ear 11 is a threaded hole and only one of the connection holes of the pressing sleeve connecting ear 21 and the pressing ring connecting ear 51 is a bare hole:

[0024] First, combine Figure 3 As shown, the connection hole on the pressing sleeve connecting ear 21 is a smooth hole, and the connection holes on the connecting sleeve connecting ear 11 and the pressing ring connecting ear 51 are both threaded holes. The second bolt 70 connects the pressing sleeve connecting ear 21 and the connecting sleeve connecting ear 11.

[0025] In this embodiment, since the connection holes on the connecting ear 11 of the connecting sleeve and the connecting ear 51 of the pressing ring are both threaded holes, the two cannot be further connected by bolts, and the pressing sleeve connecting ear 21 and the connecting ear 11 of the connecting sleeve are connected by the second bolt 70 to connect the connecting sleeve 10 with the assembly consisting of the pressing sleeve 20 and the pressing ring 50 as a whole. By tightening the second bolt 70, the pressing ring 50 squeezes the sealing ring 40 in the step hole of the connecting sleeve 10, ensuring the effective pre-tightening and sealing of the sealing ring 40.

[0026] Second, combine Figure 1 As shown, the connection hole on the pressing ring connecting ear 51 is a smooth hole, and the connection holes on the connecting sleeve connecting ear 11 and the pressing sleeve connecting ear 21 are both threaded holes. The second bolt 70 connects the pressing ring connecting ear 51 and the connecting sleeve connecting ear 11.

[0027] In this embodiment, since the connection holes on the connection ear 11 of the connection sleeve and the connection ear 21 of the pressing sleeve are both threaded holes, the two cannot be further connected by bolts, and the pressing ring connection ear 51 and the connection ear 11 of the connection sleeve are connected by the second bolt 70 to connect the connection sleeve 10 with the assembly consisting of the pressing sleeve 20 and the pressing ring 50 as a whole. By tightening the second bolt 70, the pressing ring 50 squeezes the sealing ring 40 in the step hole of the connection sleeve 10, ensuring the effective pre-tightening and sealing of the sealing ring 40.

[0028] In addition to the above situation, on the premise that at least one of the connecting holes on the pressing sleeve connecting ear 21 and the pressing ring connecting ear 51 is a blank hole, if the connecting hole on the connecting sleeve connecting ear 11 is a blank hole, that is to say, at least two of the connecting holes of the connecting sleeve connecting ear 11, the pressing ring connecting ear 51 and the pressing sleeve connecting ear 21 are blank holes, there is no situation where both connecting ears to be connected are threaded holes, and the bolt connection method is not limited to the above two situations.

[0029] In addition, combined Figure 5As shown, it is necessary to explain that: the pressing sleeve connecting ear 21 is connected to the pressing ring connecting ear 51 by a first bolt 60, and the pressing ring connecting ear 51 is connected to the connecting sleeve connecting ear 11 by a second bolt 70. On this basis, the pressing sleeve connecting ear 21 and the connecting sleeve connecting ear 11 can be further connected by a third bolt 80 to further enhance the connection reliability between the connecting sleeve 10, the pressing ring 50 and the pressing sleeve 20.

[0030] It should be noted that when the first bolt 60 is used to connect the pressing ring 50 and the pressing sleeve 20, it is sufficient to consider the displacement tendency between the pressing ring 50 and the pressing sleeve 20 to limit the displacement from each other, because the cavity of the pressing sleeve 20 that accommodates the locking ring 30 is a tapered hole. When the pressing ring 50 moves toward the side of the pressing sleeve 20, the bayonet-shaped locking ring 30 gradually shrinks and moves toward the small-diameter end of the pressing sleeve 20. When the toothed or friction surface of the inner ring of the locking ring 30 clamps the pipe A to be connected, there is almost no displacement space between the pressing ring 50 and the pressing sleeve 20, thereby forming a rigid matching structure between the pressing ring 50 and the pressing sleeve 20. In addition, the matching scheme of the shape of the locking ring 30 and the tapered hole of the inner ring of the pressing sleeve 20 can be found in the relevant literature disclosed in the background technology section.

Claims

1. A pipe connector, comprising a connecting sleeve (10), a pressure ring (50) and a pressing sleeve (20) which are sequentially sleeved on the pipe end section of the pipe (A) to be connected along the pipe length direction, a connecting flange (12) at one end of the connecting sleeve (10) is located at the pipe end of the pipe (A) to be connected, the other end of the connecting sleeve (10) is a step hole and one end of the pressing ring (50) is located at the orifice of the step hole, a sealing ring (40) is placed in an annular cavity surrounded by the step hole of the connecting sleeve (10), the outer wall of the pipe (A) to be connected and the end face of the pressing ring (50), and a locking ring (30) is arranged in an annular cavity surrounded by the pressing sleeve (20), the outer wall of the pipe (A) to be connected and the end face of the pressing ring (50), and characterized in that: The pressing sleeve (20) and the pressing ring (50) are connected by a first bolt (60) to form an anti-slip assembly, and then the pressing ring (50) and / or the pressing sleeve (20) and the connecting sleeve (10) in the anti-slip assembly are connected by a second bolt (70), and the first bolt (60) and the second bolt (70) are arranged circumferentially staggered with each other.

2. The pipe connector according to claim 1, characterized in that: Annular connecting sleeve connecting ears (11), pressing sleeve connecting ears (21) and pressing ring connecting ears (51) are arranged at circumferential intervals on the outer circumferential surfaces of the connecting sleeve (10), the pressing sleeve (20) and the pressing ring (50), respectively; a first bolt (60) is inserted into the connecting holes of the pressing sleeve connecting ears (21) and the pressing ring connecting ears (51) which are circumferentially corresponding, and a second bolt (70) is inserted into the connecting holes of the pressing ring connecting ears (51) and / or the pressing sleeve connecting ears (21) and the connecting sleeve connecting ears (11) which are circumferentially corresponding.

3. The pipe connector according to claim 1 or 2, characterized in that: The threaded end of the first bolt (60) is connected to a nut to form a connection fit that limits the pressing sleeve (20) and the pressing ring (50) from moving away from each other, and the threaded end of the second bolt (70) is connected to a nut to form a connection fit that limits the assembly consisting of the pressing ring (50) and the pressing sleeve (20) and the connecting sleeve (10) from moving away from each other.

4. The pipe connector according to claim 3, characterized in that: Among the connecting sleeve connecting ear (11), the pressing sleeve connecting ear (21) and the pressing ring connecting ear (51), at least one of the connecting holes on the pressing sleeve connecting ear (21) and the pressing ring connecting ear (51) is a plain hole, and the other connecting holes are threaded holes or plain holes.

5. The pipe connector according to claim 4, characterized in that: The connection hole on the pressing sleeve connecting ear (21) is a smooth hole, and the connection holes on the connecting sleeve connecting ear (11) and the pressing ring connecting ear (51) are both threaded holes. The second bolt (70) connects the pressing sleeve connecting ear (21) and the connecting sleeve connecting ear (11).

6. The pipe connector according to claim 4, characterized in that: The connection hole on the pressing ring connecting ear (51) is a smooth hole, and the connection holes on the connecting sleeve connecting ear (11) and the pressing sleeve connecting ear (21) are both threaded holes. The second bolt (70) connects the pressing ring connecting ear (51) and the connecting sleeve connecting ear (11).

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