CN222351716U - Pipeline connectors - Google Patents

Abstract

A pipe connector includes a connecting sleeve, a compression ring and a compression sleeve which are sequentially sleeved on the pipe end section of the pipe to be connected along the pipe length direction, a 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 compression ring is located at the orifice of the step hole, a 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 compression ring, a locking ring is arranged in an annular cavity surrounded by the compression sleeve, the outer wall of the pipe to be connected and the end face of the compression ring, the connecting sleeve and the compression ring are connected by a first bolt to form a sealing assembly that limits the connecting sleeve and the compression ring from moving toward or away from each other, and the connecting sleeve and/or the compression ring in the sealing assembly are connected by a second bolt. The pre-tightening adjustment of the sealing ring and the pre-tightening adjustment of the locking ring are completed independently of each other, the compression ring and the connecting sleeve will not be relatively displaced, and the reliability of sealing and anti-slip of the pipe connector is ensured.

Description

Pipe connector

Technical Field

The utility model relates to a pipeline connector, in particular to a pipeline connector.

Background

In the process of pipeline laying or maintenance, pipelines are usually required to be connected, welding or flange connection is adopted for realizing the pipeline connection with larger pipe diameter, and a flange plate is additionally arranged at the pipe end of a light pipe under the condition that the light pipe is inconvenient to use and is a good option.

The name of the cast tube anti-drop structure (the document number is CN206918470U, hereinafter referred to as document 1) discloses that a nail tube is connected with an insertion tube in an inserting way, a gasket is arranged between the nail tube and the insertion tube, the insertion tube is movably connected with a gland in an inserting way, the insertion tube is fixedly connected with an anti-drop ring, a flange plate on the nail tube is fixedly connected with the gland and the anti-drop ring through bolts by nuts, and the conical surface of the nail tube and the gasket, the outer surface of the insertion tube and the inner ring surface of the gasket, and the gland and the outer end surface of the gasket are all connected in an extruding way for preventing drop and plugging of the cast tube;

the technical scheme disclosed by the name of an anti-drop pipeline joint (reference number CN216715490U, hereinafter referred to as reference 2) comprises a joint body, a connecting flange and a gland, wherein the joint body, the connecting flange and the gland are sequentially provided with a first perforation, a second perforation and a third perforation, a counter bore is formed in the joint body, a sealing ring is arranged in the counter bore, an inclined guide surface is arranged on the inner side wall of the third perforation, an anti-drop ring is arranged in the third perforation, and the joint body and the connecting flange and the gland are fixedly connected through a bolt connection structure respectively. 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;

The technical scheme disclosed by the name of an anti-slip connector for pipeline connection (the document number is CN113154155A, the following is referred to as document 3) comprises a first gland, a second gland, a sealing ring, an anti-slip locking ring and a body for inserting a pipeline, wherein the first gland and the second gland are respectively in a collar shape, a first flange is arranged on the periphery of the first gland, a second flange is arranged on the periphery of the second gland, a sealing ring accommodating part is formed at the pipeline insertion end of the body, and a third flange is arranged on the outer side of the sealing ring accommodating part;

The name of the pipe anti-drop connector (document number is CN216643394U, hereinafter referred to as document 4) is a prior application document of the applicant, the pipe anti-drop connector comprises a connecting sleeve and a pressing sleeve which are sleeved on a to-be-connected pipe, the connecting sleeve and the pressing sleeve form connection fit for limiting axial separation of the connecting sleeve and the pressing sleeve, a locking ring and an elastic sealing ring are sleeved on the to-be-connected pipe at the joint of the pressing sleeve and the connecting sleeve, the locking ring and the elastic sealing ring form mutual axial extrusion fit and radial deformation when the pressing sleeve and the connecting sleeve are mutually close to each other and move, one end of the connecting sleeve, which is far away from the pressing sleeve, is connected with a pipe connecting piece or a pipe part, a pressing ring sleeved on the to-be-connected pipe is arranged between the locking ring and the elastic sealing ring, two ends of the pressing ring are respectively abutted against the elastic sealing ring, the connecting sleeve and the pressing sleeve are connected through a screw, the pressing ring is connected with the screw to form axial limiting, and locking nuts are arranged on opposite sides of the connecting sleeve and the pressing sleeve.

In the prior art, the connecting sleeve, the pressing ring and the pressing sleeve are sequentially connected by adopting a connecting scheme that one bolt penetrates through three parts, namely the same bolt is used for connecting the three parts together, and the common defects of the prior art are that the pre-tightening adjustment of the sealing ring and the pre-tightening adjustment of the locking ring cannot be independently completed, so that the pre-tightening adjustment of the sealing ring and the pre-tightening adjustment of the locking ring are mutually interfered, namely the pre-tightening amount of the locking ring which is originally adjusted to a proper anti-falling degree can be damaged when the pre-tightening degree of the sealing ring is adjusted, and vice versa.

Disclosure of Invention

The utility model provides a pipeline connector, wherein the pretension adjustment of a sealing ring and the pretension adjustment of a locking ring are independently completed to ensure the reliability of tightness and anti-drop property.

In order to achieve the purpose, the technical scheme is that the pipeline connector comprises a connecting sleeve, a pressing ring and a pressing sleeve which are sequentially sleeved on a pipe end section of a pipeline to be connected along the length direction of the pipeline, a connecting flange at one end of the connecting sleeve is positioned at the pipe end of the pipeline to be connected, the other end of the connecting sleeve is a step hole, one end of the pressing ring is positioned at an orifice of the step hole, a sealing ring is arranged in an annular cavity surrounded by the step hole of the connecting sleeve, the outer wall of the pipeline to be connected and the end face of the pressing ring, a locking ring is arranged in the annular cavity surrounded by the pressing sleeve, the outer wall of the pipeline to be connected and the end face of the pressing ring, and the connecting sleeve and the pressing ring are connected through a first bolt to form a sealing assembly for limiting the opposite movement of the connecting sleeve and the pressing ring, and/or the connection between the pressing ring and the pressing sleeve through a second bolt.

Compared with the prior art, the pipeline connector has the technical effects that when the pipeline connector is assembled with a pipeline to be connected, the connecting sleeve and the pressure ring are connected through the first bolt to form the sealing assembly which limits the opposite or back movement of the connecting sleeve and the pressure ring, the relative positions of the connecting sleeve and the pressure ring are fixed, the pressure sleeve and the connecting sleeve and/or the pressure ring are connected through the second bolt, the pre-tightening adjustment of the sealing ring and the pre-tightening adjustment of the locking ring are completed independently, the pressure ring and the connecting sleeve cannot relatively displace, and the sealing and anti-falling reliability of the pipeline connector is ensured.

Drawings

FIG. 1 is a schematic perspective view of a first embodiment of a connection between a connection sleeve, a compression ring, and a compression sleeve;

FIG. 2 is a view in the direction K of FIG. 1;

FIG. 3 is a sectional view showing an assembled state of a locking ring and a sealing ring;

FIG. 4 is a schematic perspective view of a second embodiment of a connection between a connection sleeve, a compression ring, and a compression sleeve;

FIG. 5 is an N-directional view of FIG. 4;

FIG. 6 is a partial schematic view of a first connection embodiment of the adapter sleeve tab and the compression ring tab;

FIG. 7 is a partial schematic view of a second embodiment of a connection sleeve lug and compression ring lug;

FIG. 8 is a partial schematic view of a third embodiment of a connecting sleeve lug and pressure ring lug;

FIG. 9 is a partial schematic view of a fourth embodiment of a connection lug of the connection sleeve and a connection lug of the pressure ring;

FIG. 10 is a partial schematic view of a fifth embodiment of a connection sleeve lug and compression ring lug;

FIG. 11 is a schematic view of a press ring.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-11 and the associated text:

The utility model provides a pipeline connector, including cover establishes adapter sleeve 10, clamping ring 50 and the pressure cover 20 on waiting to take over pipeline A pipe end section in proper order along the pipe length direction, the flange 12 of adapter sleeve 10 one end is located waiting to take over pipeline A pipe end department, the other end of adapter sleeve 10 is the step hole and the one end of clamping ring 50 is located the drill way department of step hole, sealing washer 40 is arranged in the annular chamber that the step hole of adapter sleeve 10 encloses with waiting to take over pipeline A's outer wall and clamping ring 50's terminal surface, set up locking ring 30 in the annular chamber that encloses between pressure cover 20 and waiting to take over pipeline A's outer wall and clamping ring 50's terminal surface, adapter sleeve 10 and clamping ring 50 are connected by first bolt 60 and are formed and are restricted adapter sleeve 10 and clamping ring 50 and sealing assembly back that the back moved is connected by second bolt 70 between sealing assembly's adapter sleeve 10 and/or clamping ring 50 and the pressure cover 20.

In the above scheme, the press sleeve 20, the press 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 press ring 50 is positioned between the press sleeve 20 and the connecting sleeve 10. The connecting sleeve 10 is connected with the pressure ring 50 through the first bolt 60, the pressure ring 50 and the connecting sleeve 10 can be controlled to move oppositely, the pressure ring 50 can squeeze the sealing ring 40 in the stepped hole of the connecting sleeve 10, so that the sealing ring 40 can be radially deformed, and the sealing ring 40 can be tightly attached to the outer pipe wall of the pipeline A to be connected to form sealing fit. After the sealing ring 40 and the pipe A to be connected form effective sealing fit, the sealing assembly for limiting the opposite or back movement of the connecting sleeve 10 and the pressing ring 50 is fixed, namely, the connecting sleeve 10 and the pressing ring 50 are fixed in opposite positions to form a rigid integral structure, and then the pressing sleeve 20 is connected with the connecting sleeve 10 and/or the pressing ring 50 by the second bolt 70 and is pre-tightened, so that the pressing ring 50 abuts against the locking ring 30 in the conical hole at the inner side of the pressing sleeve 20, the locking ring 30 is effectively clamped on the pipe A to be connected, natural separation of the pipe connector and the pipe A to be connected is avoided, and pre-tightening adjustment of the sealing ring 40 and pre-tightening adjustment of the locking ring 30 are mutually independent, so that the sealing and anti-falling reliability of the pipe connector is ensured. The connection between the pipeline connectors and the pipeline A to be connected is sequentially completed, the pipeline connectors are arranged on the other pipeline A to be connected in a similar way, and the two pipeline connectors are connected through the connecting flange 12 at the end part of the connecting sleeve 10 so as to be communicated with the two pipelines A to be connected.

The pre-tightening of the locking ring 30 depends on the squeezing action of the pressing sleeve 20 and the pressing ring 50 on the pre-tightening, so that the connecting sleeve 10 and the pressing ring 50 cannot relatively move, and the situation that the locking ring 30 cannot effectively clamp the pipe a to be connected due to the fact that the pressing ring 50 moves towards the connecting sleeve 10 and the pressing ring 50 and the locking ring 30 are loosened can be avoided.

Further, in order to facilitate the interconnection of the connecting sleeve 10, the pressing sleeve 20 and the pressing ring 50, annular connecting sleeve connecting lugs 11, pressing sleeve connecting lugs 21 and pressing ring connecting lugs 51 are respectively arranged on the outer circumferential surfaces of the connecting sleeve 10, the pressing sleeve 20 and the pressing ring 50 at circumferential intervals, the first bolts 60 are arranged in connecting holes of the connecting sleeve connecting lugs 11 and the pressing ring connecting lugs 51 corresponding to circumferential parity, and the second bolts 70 are arranged in connecting holes of the connecting sleeve connecting lugs 11 and/or the pressing ring connecting lugs 51 and the pressing sleeve connecting lugs 21 corresponding to circumferential parity.

Preferably, the bolt body of the first bolt 60 is connected with a nut to form a connection fit for limiting the connection sleeve 10 and the compression ring 50 to be mutually close to or far away from each other, and the threaded end of the second bolt 70 is connected with the nut to form a connection fit for limiting the assembly formed by the connection sleeve 10 and the compression ring 50 and the compression sleeve 20 to be mutually far away from each other. The first bolt 60 and the second bolt 70 are matched with corresponding nuts, so that the relative positions of the connecting sleeve 10, the pressing sleeve 20 and the pressing ring 50 are stable.

In the scheme, at least one connecting hole of the connecting sleeve 11, the pressing sleeve 21 and the pressing ring 51 is a unthreaded hole, and other connecting holes are threaded holes or unthreaded holes. The connection modes among the connecting sleeve 10, the pressing ring 50 and the pressing sleeve 20 are different according to the arrangement positions and the number of the unthreaded holes and the penetrating direction of the bolts.

Considering that the connection Kong Re on the two connecting lugs to be connected is a threaded hole, the two connecting lugs cannot be effectively connected through bolts, so the following detailed description is made on the connection condition that the connecting holes on the pressing sleeve connecting lug 21 are threaded holes, and only one connecting hole of the connecting sleeve connecting lug 11 and the pressing ring connecting lug 51 is a light hole:

First, referring to fig. 1, 2 and 6, the connecting hole on the pressure ring connecting lug 51 is a light hole, the connecting holes on the connecting sleeve connecting lug 11 and the pressure sleeve connecting lug 21 are threaded holes, the first bolt 60 sequentially passes through the threaded hole on the connecting sleeve connecting lug 11, the light hole on the pressure ring connecting lug 51 and forms threaded fit with the threaded hole of the connecting sleeve connecting lug 11, two locking nuts 62 are respectively arranged at two ends of the light hole on the pressure ring connecting lug 51 on the first bolt 60, and the second bolt 70 connects the pressure ring 50 and the pressure sleeve 20.

In this way, the first bolt 60 is threaded from the connecting lug 11 to the pressing lug 51, the first bolt 60 and the threaded hole of the connecting lug 11 form threaded engagement, and the first bolt 60 and the threaded hole are locked relatively without free sliding in the axial direction of the pipe to be connected a, so as to form a rigid integral structure. On the premise of this, two lock nuts 62 are respectively arranged at two ends of the unthreaded hole on the first bolt 60, the two lock nuts 62 are clamped on opposite side end surfaces of the press ring connecting lug 51, and two sides of the press ring connecting lug 51 can be limited, so that the relative displacement between the press ring 50 and the connecting sleeve 10 is avoided, the sealing ring 40 is prevented from being excessively extruded by the press ring 50 to cause excessive deformation, and meanwhile, the condition that the press ring 50 slides towards the connecting sleeve to cause the looseness of the locking ring 30 is avoided.

Secondly, as shown in fig. 4, 5 and 7, the connecting hole on the press ring connecting lug 51 is a light hole, the connecting holes on the connecting sleeve connecting lug 11 and the press sleeve connecting lug 21 are threaded holes, the first bolt 60 passes through the light hole on the press ring connecting lug 51 and forms threaded fit with the threaded hole of the connecting sleeve connecting lug 11, the locking nut 62 and the bolt head 61 are respectively arranged at two ends of the connecting hole on the press ring connecting lug 51, and the second bolt 70 is connected with the press ring 50 and the press sleeve 20.

In this way, the difference from the first embodiment is that the first bolt 60 is threaded from the press ring connection lug 51 to the connection sleeve connection lug 11, the first bolt 60 and the threaded hole of the connection sleeve connection lug 11 form a threaded fit, and the two are locked relatively without free sliding in the axial direction of the to-be-connected pipeline a, so as to form a rigid integral structure. On the premise of this, only one lock nut 62 is provided on the first bolt 60, and the lock nut 62 cooperates with the bolt head 61 to clamp against the opposite side end surfaces of the press ring connecting lug 51, so as to limit the two sides of the press ring connecting lug 51, thereby ensuring that the press ring 50 and the connecting sleeve 10 cannot relatively displace, ensuring that the seal ring 40 cannot be excessively extruded by the press ring 50 to cause excessive deformation, and avoiding the occurrence of the loose condition of the lock ring 30 caused by the slippage of the press ring 50 to the connecting sleeve.

Third, as shown in fig. 8, the connecting hole on the connecting sleeve connecting lug 11 is a light hole, the connecting hole on the pressure ring connecting lug 51 and the pressure sleeve connecting lug 21 is a threaded hole, the first bolt 60 passes through the light hole on the connecting sleeve connecting lug 11 and forms threaded fit with the threaded hole of the pressure ring connecting lug 51, the locking nut 62 and the bolt head 61 are respectively arranged at two ends of the connecting hole on the connecting sleeve connecting lug 11, and the second bolt 70 connects the pressure sleeve 20 and the connecting sleeve 10.

In this embodiment, the difference from the first two embodiments is that the connection hole on the connection lug 11 is a light hole and the first bolt 60 is inserted from the connection lug 11 to the press ring connection lug 51. The first bolt 60 and the threaded hole of the compression ring connecting lug 51 form threaded fit, and are locked relatively without free sliding in the axial direction of the to-be-connected pipeline A, so that a rigid integral structure is formed. On the premise that the first bolt 60 is provided with only one locking nut 62, the locking nut 62 is matched with the bolt head 61 to clamp against the opposite side end face of the connecting sleeve connecting lug 11, and the relative displacement between the first bolt 60 and the connecting sleeve connecting lug 11 is limited, so that the relative displacement between the pressing ring 50 and the connecting sleeve 10 is avoided, the sealing ring 40 is prevented from being excessively extruded by the pressing ring 50 to cause excessive deformation, and meanwhile, the situation that the pressing ring 50 slides towards the connecting sleeve to cause the looseness of the locking ring 30 is avoided.

Fourth, as shown in fig. 9, the connecting hole on the connecting sleeve connecting lug 11 is a light hole, the connecting hole on the pressure ring connecting lug 51 and the pressure sleeve connecting lug 21 is a threaded hole, the first bolt 60 sequentially passes through the threaded hole on the pressure ring connecting lug 51, the light hole on the connecting sleeve connecting lug 11 and forms threaded fit with the threaded hole of the pressure ring connecting lug 51, two locking nuts 62 are respectively arranged at two ends of the light hole on the connecting sleeve connecting lug 11 on the first bolt 60, and the second bolt 70 is connected with the pressure sleeve 20 and the connecting sleeve 10.

In this embodiment, the difference from the third embodiment is that the first bolts 60 are inserted from the press ring connecting lugs 51 to the joint sleeve connecting lugs 11. The first bolt 60 and the threaded hole of the compression ring connecting lug 51 form threaded fit, and are locked relatively without free sliding in the axial direction of the to-be-connected pipeline A, so that a rigid integral structure is formed. On the premise of this, two lock nuts 62 are disposed on the first bolt 60, and the two lock nuts 62 are clamped against opposite side end surfaces of the press ring connecting lug 51, so as to limit the relative displacement between the first bolt 60 and the connecting sleeve connecting lug 11, thereby ensuring that the press ring 50 and the connecting sleeve 10 cannot relatively displace, ensuring that the seal ring 40 cannot be excessively extruded by the press ring 50 to cause excessive deformation, and avoiding the occurrence of the condition that the press ring 50 slides towards the connecting sleeve to cause the looseness of the lock ring 30.

In addition, as shown in fig. 10, another case that needs to be described is that if the connecting holes on the connecting lug 11 and the pressing ring connecting lug 51 are all light holes, three locking nuts 62 are connected to the bolt body of the first bolt 60, the bolt head 61 of the first bolt 60 and one locking nut 62 are respectively arranged at two ends of the light hole on the connecting lug 11, and the other two locking nuts 62 are respectively arranged at two ends of the light hole of the pressing ring connecting lug 51. In this case, the first bolt 60 is threaded from the connecting lug 11 to the pressing lug 51, or threaded from the pressing lug 51 to the connecting lug 11, and three locking nuts 62 are required to be connected to the first bolt 60 to cooperate with the bolt head 61 to clamp the connecting lug 11 and the pressing lug 51 respectively, so that the connecting lug 11 and the pressing lug 51 can be fixed relative to the first bolt 60, and the relative displacement of the three in the axial direction is limited, thereby ensuring that the pressing ring 50 and the connecting lug 10 cannot be displaced relatively, and ensuring that the locking ring 30 is effectively preloaded. In this embodiment, the second bolts 70 may connect the press sleeve 20 to the connection sleeve 10 and/or the press ring 50.

Here, if the connecting hole on the press sleeve connecting lug 21 is a unthreaded hole, and if at least one of the connecting holes on the press sleeve connecting lug 21 and the press ring connecting lug 51 is a unthreaded hole, at least two connecting holes of the connecting sleeve connecting lug 11, the press ring connecting lug 51 and the press sleeve connecting lug 21 are unthreaded holes, there is no case that the two connecting lugs to be connected are threaded holes, and the bolt connection manner between the components formed by the press sleeve connecting lug 21, the connecting sleeve connecting lug 11 and the press ring connecting lug 51 ensures that the press sleeve connecting lug 21 is not far away from the connecting sleeve connecting lug 11 or the press ring connecting lug 51, which will not be described herein.

Referring to fig. 1, an arc groove 22 is formed on the outer peripheral surface of the pressing sleeve 20 at a position corresponding to the first bolt 60, the arc groove 22 and the first bolt 60 form an avoidance space, the arc groove 22 penetrates through opposite sides of the pressing sleeve 20 along the axial direction of the first bolt 60, and the curvature center of the inner arc surface of the arc groove 22 is located on the side of the bolt core of the first bolt 60. The arc-shaped groove 22 can accommodate the bolt body of the first bolt 60, so that the extension section of the first bolt 60 cannot interfere with the press sleeve 20, and reasonable connection among the connecting sleeve 10, the press ring 50 and the press sleeve 20 is ensured.

When the connecting sleeve 10 and/or the pressing ring 50 are/is connected with the pressing sleeve 20 by the second bolt 70, the displacement trend that the connecting sleeve 10 and/or the pressing ring 50 are/is limited to be away from each other is only considered, because the cavity of the pressing sleeve 20 for accommodating the locking ring 30 is a conical hole, when the pressing ring 50 approaches to one side of the pressing sleeve 20 for displacement, the bayonet-shaped locking ring 30 gradually contracts and displaces towards the small-aperture end of the pressing sleeve 20, and when the tooth shape or the friction surface of the inner ring of the locking ring 30 is used for hooping the pipe A to be connected, the pressing ring 50 and the pressing sleeve 20 have no displacement space which approaches to each other, so that a rigid matching structure of the connecting sleeve 10 and/or the pressing ring 50 and the pressing sleeve 20 is formed, and in addition, the shape of the locking ring 30 and the matching scheme of the conical hole of the inner ring of the pressing sleeve 20 can be seen from relevant documents disclosed in the background art.

Claims (10)

1. A pipeline connector comprises a connecting sleeve (10), a pressing ring (50) and a pressing sleeve (20) which are sequentially sleeved on a pipe end section of a pipeline to be connected in the length direction of the pipeline, a connecting flange (12) at one end of the connecting sleeve (10) is positioned at the pipe end of the pipeline to be connected, the other end of the connecting sleeve (10) is a stepped hole, one end of the pressing ring (50) is positioned at an orifice of the stepped hole, a sealing ring (40) is arranged in an annular cavity surrounded by the stepped hole of the connecting sleeve (10) and the outer wall of the pipeline to be connected and the end face of the pressing ring (50), and a locking ring (30) is arranged in the annular cavity surrounded by the pressing sleeve (20) and the outer wall of the pipeline to be connected and the end face of the pressing ring (50), and is characterized in that the connecting sleeve (10) and the pressing ring (50) are connected by a first bolt (60) to form a sealing assembly which is used for limiting the connecting sleeve (10) and the pressing ring (50) to move in opposite directions or back directions, and the connecting sleeve (10) and/the pressing ring (50) and the pressing sleeve (20) are connected by a second bolt (70).

2. The pipe connector of claim 1, wherein annular connecting sleeve connecting lugs (11), pressing sleeve connecting lugs (21) and pressing ring connecting lugs (51) are respectively arranged on the outer peripheral surfaces of the connecting sleeve (10), the pressing sleeve (20) and the pressing ring (50) at circumferential intervals, the first bolts (60) are arranged in connecting holes of the connecting sleeve connecting lugs (11) and the pressing ring connecting lugs (51) corresponding to circumferential parity, and the second bolts (70) are arranged in connecting holes of the connecting sleeve connecting lugs (11) and/or the pressing ring connecting lugs (51) and the pressing sleeve connecting lugs (21) corresponding to circumferential parity.

3. The pipe connector according to claim 2, wherein the bolt body of the first bolt (60) is connected with a nut to form a connection fit for limiting the connection sleeve (10) and the pressing ring (50) to be mutually close to or far away from each other, and the threaded end of the second bolt (70) is connected with the nut to form a connection fit for limiting the assembly formed by the connection sleeve (10) and the pressing ring (50) and the pressing sleeve (20) to be mutually far away from each other.

4. A pipe connector according to claim 3, wherein at least one of the connecting lug (11) and the connecting hole of the pressing ring connecting lug (51) is an optical hole, and the other connecting holes are screw holes or optical holes.

5. The pipe connector of claim 4, wherein the connecting hole on the pressing ring connecting lug (51) is a unthreaded hole, the connecting holes on the connecting sleeve connecting lug (11) and the pressing sleeve connecting lug (21) are threaded holes, the first bolt (60) sequentially passes through the threaded hole on the connecting sleeve connecting lug (11), the unthreaded hole on the pressing ring connecting lug (51) and forms threaded fit with the threaded hole of the connecting sleeve connecting lug (11), two locking nuts (62) are respectively arranged at two ends of the unthreaded hole on the pressing ring connecting lug (51) on the first bolt (60), and the second bolt (70) connects the pressing ring (50) and the pressing sleeve (20).

6. A pipe connector according to claim 3, wherein the connecting holes of the press ring connecting lug (51) are light holes, the connecting holes of the connecting sleeve connecting lug (11) and the connecting sleeve connecting lug (21) are threaded holes, the first bolt (60) passes through the light holes of the press ring connecting lug (51) and is in threaded fit with the threaded holes of the connecting sleeve connecting lug (11), the locking nut (62) and the bolt head (61) are respectively arranged at two ends of the connecting holes of the press ring connecting lug (51), and the second bolt (70) is used for connecting the press ring (50) and the press sleeve (20).

7. A pipe connector according to claim 3, wherein the connecting hole of the connecting sleeve connecting lug (11) is an optical hole, the connecting hole of the pressing ring connecting lug (51) and the connecting hole of the pressing sleeve connecting lug (21) are threaded holes, the first bolt (60) passes through the optical hole of the connecting sleeve connecting lug (11) and is in threaded fit with the threaded hole of the pressing ring connecting lug (51), the locking nut (62) and the bolt head (61) are respectively arranged at two ends of the connecting hole of the connecting sleeve connecting lug (11), and the second bolt (70) is used for connecting the pressing sleeve (20) and the connecting sleeve (10).

8. A pipe connector according to claim 3, wherein the connecting hole on the connecting sleeve connecting lug (11) is an unthreaded hole, the connecting hole on the pressure ring connecting lug (51) and the connecting hole on the pressure sleeve connecting lug (21) are threaded holes, the first bolt (60) sequentially passes through the threaded hole on the pressure ring connecting lug (51), the unthreaded hole on the connecting sleeve connecting lug (11) and forms threaded fit with the threaded hole of the pressure ring connecting lug (51), two locking nuts (62) are respectively arranged at two ends of the unthreaded hole on the connecting sleeve connecting lug (11) on the first bolt (60), and the second bolt (70) connects the pressure sleeve (20) and the connecting sleeve (10).

9. The pipe connector of claim 3, wherein the connecting holes of the connecting sleeve connecting lug (11) and the pressing ring connecting lug (51) are all light holes, three locking nuts (62) are connected to the bolt body of the first bolt (60), the bolt head (61) and one locking nut (62) of the first bolt (60) are respectively arranged at two ends of the light holes of the connecting sleeve connecting lug (11), and the other two locking nuts (62) are respectively arranged at two ends of the light holes of the pressing ring connecting lug (51).

10. The pipe connector of claim 1, wherein an arc-shaped groove (22) is formed in the outer peripheral surface of the pressing sleeve (20) at a position corresponding to the first bolt (60), the arc-shaped groove (22) and the first bolt (60) form an avoidance space, the arc-shaped groove (22) penetrates through the opposite side of the pressing sleeve (20) along the axial direction of the first bolt (60), and the curvature center of the inner cambered surface of the arc-shaped groove (22) is located on the side of the bolt core of the first bolt (60).