CN211289087U

CN211289087U - Large-diameter thin-wall pipe fitting connecting joint

Info

Publication number: CN211289087U
Application number: CN201921894728.8U
Authority: CN
Inventors: 王群伟; 王林龙; 马照军
Original assignee: China Chemical Engineering Thirteenth Construction Co ltd
Current assignee: China Chemical Engineering Thirteenth Construction Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-08-18
Anticipated expiration: 2029-11-05

Abstract

The utility model provides a heavy-calibre thin-walled tube spare attach fitting, belong to pipe connection spare technical field, heavy-calibre thin-walled tube spare attach fitting is equipped with coupling assembling, coupling assembling includes the main part, the sealing member, first pressure head and second pressure head, the main part is equipped with the ring channel, the ring channel is used for inserting and treats the connection pipe fitting, the interior rampart of ring channel is used for supporting its pipe wall from the inside of treating the connection pipe fitting, the sealing member is used for the cover to establish and treats to connect on the pipe fitting and be located the ring channel, the sealing member includes first sealing and second sealing, just radial movement in the ring channel is located to first pressure head, a wall for compressing tightly first sealing on treating the connection pipe fitting, just axial displacement in the ring channel is located to the second pressure head, a bottom for compressing tightly the. The utility model provides a heavy-calibre thin-walled tube spare attach fitting can solve the inconvenient technical problem of heavy-calibre thin-walled tube spare connection.

Description

Large-diameter thin-wall pipe fitting connecting joint

Technical Field

The utility model belongs to the technical field of the pipe connection spare, more specifically say, relate to a heavy-calibre thin-walled tube spare attach fitting.

Background

In the existing pipe connection, threads are generally hinged at the end to be connected of the pipe, and the pipe is connected with a joint through the threads or is connected with the joint into a whole through welding. The thin-wall metal pipe fitting can also be connected by integrating the pipe fitting to be connected and the joint clamp in a clamping and pressing mode. For the large-caliber thin-wall metal pipe fitting, the pipe wall is too thin, threads cannot be hinged, welding is easy to burn through, the size of a pliers required by clamping and pressing is large, the connection mode is poor in application effect and even cannot be applied, and the large-caliber metal pipe fitting is inconvenient to connect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heavy-calibre thin-walled tube connects, aim at solving the inconvenient technical problem of heavy-calibre thin-walled tube connects.

In order to achieve the above object, the utility model adopts the following technical scheme: the large-caliber thin-wall pipe fitting connecting joint is provided with a connecting assembly, wherein the connecting assembly comprises a main body, a sealing element, a first pressure head and a second pressure head;

the main body is provided with an annular groove, the annular groove is used for inserting a pipe fitting to be connected, and the inner annular wall of the annular groove is used for supporting the pipe wall of the pipe fitting to be connected from the inside of the pipe fitting to be connected;

the sealing element is used for being sleeved on the pipe fitting to be connected and is positioned in the annular groove, and the sealing element comprises a first sealing part and a second sealing part;

the first pressure head is arranged in the annular groove and moves in the radial direction, and is used for pressing the first sealing part on the outer wall of the pipe fitting to be connected; and

the second pressure head is arranged in the annular groove and moves axially, and is used for pressing the second sealing part at the bottom of the annular groove.

As another embodiment of the present application, the first ram is ring-shaped and is composed of a plurality of sub-segments that are radially moved by the locking assembly to approach and pinch the first seal or to move away from the first seal.

As another embodiment of the present application, the outer annular wall of the annular groove is located outside the subsection and is connected with the inner annular wall into a whole, and the locking assembly includes a sliding sleeve and a guide post;

the sliding sleeve is sleeved on the outer ring wall in a sliding manner, and a slope groove is formed in the inner wall of the sliding sleeve;

the guide columns are fixedly arranged on the back of the subsection along the radial direction and are in sliding connection with the outer ring wall through guide holes formed in the outer ring wall; the extending end of the guide column is in sliding contact with the slope groove and drives the guide column to move radially and close to the first sealing part.

As another embodiment of the present application, the second pressing head is located between the subsection and the outer ring wall, the second pressing head is fixedly connected to the sliding sleeve through a connecting block, a guide groove for the connecting block to pass through is formed in the outer ring wall, and the connecting block is slidably connected to the outer ring wall through the guide groove and moves axially.

As another embodiment of this application, the one end of sliding sleeve is connected with the driving piece, the driving piece is used for driving the sliding sleeve axial displacement.

As another embodiment of the present application, the driving member is a sleeve provided with a threaded hole, and the sleeve is disposed on the outer annular wall through threaded connection.

As another embodiment of this application, the sleeve with the sliding sleeve is around the axis relative roll setting, the sleeve is used for driving in the axial the sliding sleeve removes.

As another embodiment of this application, the sleeve with be equipped with the connecting piece between the sliding sleeve, connecting piece one end with sliding sleeve fixed connection, the connecting piece other end pass through the rolling piece with sleeve roll connection.

As another embodiment of the present application, the sub-segments are arc-shaped and six in number.

As another embodiment of this application, heavy-calibre thin-walled tube spare attach fitting still includes the body, the body is straight line shape, bending type, T-shaped or cross, the open end of body is equipped with coupling assembling.

Compared with the prior art, the large-caliber thin-wall pipe fitting connecting joint provided by the utility model can be connected with the open end of the pipe fitting to be connected by virtue of the connecting component, the pipe fitting to be connected is not required to be processed during connection, the pipe body of the pipe fitting to be connected is not damaged, and the large-caliber thin-wall pipe fitting connecting joint is convenient and reliable; during connection, the opening end of the pipe fitting to be connected is inserted into the annular groove, the sealing element is arranged in the annular groove, the first sealing part is pressed on the outer wall of the pipe fitting to be connected by using the first pressure head, the second sealing part is pressed at the bottom of the annular groove by using the second pressure head, and the pipe inner space of the pipe fitting to be connected is isolated from the external space by tightly connecting the main body of the connecting assembly and the sealing element, so that sealing connection is realized; when the first sealing part is pressed by the first pressure head, larger pressure can be generated on the pipe wall of the pipe fitting to be connected, the outer diameter of the inner ring wall is matched with the inner diameter of the pipe fitting to be connected, and the pipe wall of the pipe fitting to be connected can be supported from the inside, so that the first pressure head can apply larger pressure, the pipe fitting to be connected cannot be damaged, and the first sealing part is tightly connected with the outer wall of the pipe fitting to be connected; through the internal support of the inner ring wall, the large-caliber thin-wall pipe fitting connecting joint is not only suitable for metal pipe fittings, but also suitable for plastic or glass pipe fittings, even pipe fittings with flexible materials, and the application range is greatly improved; when needing to dismantle, can be with removing first pressure head and second pressure head, make them keep away from the sealing member, the pipe wall of waiting to connect the pipe fitting no longer compresses tightly with first sealing portion and is connected, waits to connect the pipe fitting and can follow the ring channel and shift out, realizes dismantling convenient and fast.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structural view of a large-diameter thin-wall pipe fitting connection joint provided in an embodiment of the present invention, wherein a cutting plane is located at an outer end of a first sealing portion;

FIG. 2 is a sectional view of the structure taken along line A-A in FIG. 1;

FIG. 3 is a sectional view of FIG. 1 taken along line B-B;

fig. 4 is a schematic structural diagram of a connection between a sub-segment and an outer annular wall according to an embodiment of the present invention.

In the figure: 1. a first ram; 11. a sub-segment; 2. a second ram; 31. an annular groove; 32. an inner annular wall; 33. an outer annular wall; 34. a connecting ring; 331. a guide groove; 4. a pipe fitting to be connected; 51. a first seal portion; 52. a second seal portion; 61. a sliding sleeve; 611. a ramp groove; 62. a guide post; 63. connecting blocks; 7. a sleeve; 8. a rolling member; 9. a connecting member.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to fig. 3, the present invention will be described with reference to a large-diameter thin-wall pipe fitting connection joint. The large-caliber thin-wall pipe fitting connecting joint is provided with a connecting assembly, and the connecting assembly comprises a main body, a sealing element, a first pressure head 1 and a second pressure head 2; the main body is provided with an annular groove 31, the annular groove 31 is used for inserting the pipe fitting 4 to be connected, and the inner annular wall 32 of the annular groove 31 is used for supporting the pipe wall of the pipe fitting 4 to be connected from the inside; the sealing element is used for being sleeved on the pipe fitting 4 to be connected and is positioned in the annular groove 31, and the sealing element comprises a first sealing part 51 and a second sealing part 52; the first pressure head 1 is arranged in the annular groove 31 and moves in the radial direction, and is used for pressing the first sealing part 51 on the outer wall of the pipe fitting 4 to be connected; the second ram 2 is disposed in the annular groove 31 and axially moves to press the second seal portion 52 against the bottom of the annular groove 31.

Compared with the prior art, the large-caliber thin-wall pipe fitting connecting joint provided by the utility model can be connected with the open end of the pipe fitting 4 to be connected by means of the connecting component, the pipe fitting 4 to be connected is not required to be processed during connection, the pipe body of the pipe fitting 4 to be connected is not damaged, and the large-caliber thin-wall pipe fitting connecting joint is convenient and reliable; during connection, the opening end of the pipe fitting 4 to be connected is inserted into the annular groove 31, the sealing element is arranged in the annular groove 31, the first sealing part 51 is pressed on the outer wall of the pipe fitting 4 to be connected by the first pressure head 1, the second sealing part 52 is pressed at the bottom of the annular groove 31 by the second pressure head 2, and the pipe inner space of the pipe fitting 4 to be connected is isolated from the external space by the tight connection of the main body of the connecting assembly and the sealing element, so that the sealing connection is realized; when the first pressure head 1 presses the first sealing part 51, a large pressure is generated on the pipe wall of the pipe fitting 4 to be connected, the outer diameter of the inner annular wall 32 is matched with the inner diameter of the pipe fitting 4 to be connected, and the pipe wall of the pipe fitting 4 to be connected can be supported from the inside, so that the first pressure head 1 can apply the large pressure, the pipe fitting 4 to be connected cannot be damaged, and the first sealing part 51 is tightly connected with the outer wall of the pipe fitting 4 to be connected; by arranging the inner annular wall 32, the large-caliber thin-wall pipe fitting connecting joint provided by the application is not only suitable for metal pipe fittings, but also suitable for plastic or glass pipe fittings, even pipe fittings with flexible materials, and the application range is greatly improved; when needing to dismantle, can be with removing first pressure head 1 and second pressure head 2, make them keep away from the sealing member, the pipe wall of waiting to connect pipe fitting 4 no longer compresses tightly with first sealing part 51 and is connected, waits to connect pipe fitting 4 and can follow annular groove 31 and shift out, realizes dismantling convenient and fast.

The sealing element is a ring body with an L-shaped section, can be preset in the annular groove 31 in advance, or can be sleeved on the pipe fitting 4 to be connected during connection and inserted into the annular groove 31 together with the pipe fitting 4 to be connected; when the sealing element is preset in the annular groove 31, the second sealing part 52 can be adhered to the bottom surface of the annular groove 31 for fixation, the first sealing part 51 is cylindrical, the inner diameter of the first sealing part is larger than the outer diameter of the inner annular wall 32, and a gap for inserting the pipe fitting 4 to be connected is reserved between the first sealing part 51 and the inner annular wall 32; the sealing element is made of conventional materials and can be made of rubber.

The outer diameter of the inner ring wall 32 is equal to that of the pipe fitting 4 to be connected, so that the pipe wall of the pipe fitting 4 to be connected can be supported from the inside; the outer wall of the inner ring wall 32 can be in interference fit connection with the inner wall of the pipe fitting 4 to be connected, so that a certain sealing effect is generated; even if a gap is formed between the outer wall of the inner ring wall 32 and the inner wall of the pipe 4 to be connected, the first sealing portion 51 and the second sealing portion 52 respectively press the outer wall of the pipe 4 to be connected and the bottom surface of the annular groove 31 under the action of the first pressing head 1 and the second pressing head 2, so that the pipe space inside the pipe 4 to be connected is isolated from the outside space, and a certain pressure of the fluid inside the pipe 4 to be connected can be borne, and a sealing effect is realized. After the connection is completed, the pipe 4 to be connected may be fixedly connected to the connection assembly by a frictional force between the first sealing portion 51 and an outer wall thereof.

As a specific embodiment of the large-caliber thin-walled tube connection joint provided by the present invention, please refer to fig. 1 and 4, the first pressing head 1 is annular and is composed of a plurality of sub-segments 11, and the sub-segments 11 radially move under the driving of the locking assembly, so as to approach and tighten the first sealing portion 51 or keep away from the first sealing portion 51. The sub-segment 11 is remote from the first seal 51 in fig. 1, and the sub-segment 11 is close to and grips the first seal 51 in fig. 2.

In particular, the pipe elements 4 to be connected are generally circular pipes, so that the subsections 11 are generally arc-shaped; the plurality of subsections 11 are circumferentially arranged, when the subsections 11 are close to the first sealing part 51, the subsections 11 can be connected end to form a hoop, so that the first sealing part 51 is hooped, and the sealing connection between the first sealing part 51 and the outer wall of the pipe fitting 4 to be connected is realized; the first sealing portion 51 is generally sleeve-shaped, and the inner diameter of the hoop is adapted to the outer diameter of the first sealing portion 51, and is generally slightly smaller than the outer diameter of the first sealing portion 51; when the subsection 11 is far away from the first sealing part 51, a gap is formed between the subsection and the first sealing part 51, the first sealing part 51 is not clamped, the first sealing part 51 is loosely connected with the pipe fitting 4 to be connected, and the pipe fitting 4 to be connected can be conveniently removed from the annular groove 31.

As a specific embodiment of the large-caliber thin-walled tube connection joint provided by the present invention, please refer to fig. 2, the outer annular wall 33 of the annular groove 31 is located outside the subsection 11 and is connected with the inner annular wall 32 into a whole, and the locking assembly includes a sliding sleeve 61 and a guide post 62; the sliding sleeve 61 is sleeved on the outer annular wall 33 in a sliding manner, and a slope groove 611 is formed in the inner wall of the sliding sleeve 61; the guide posts 62 are fixedly arranged on the back of the subsection 11 along the radial direction, and the guide posts 62 pass through guide holes arranged on the outer annular wall 33 and are in sliding contact with the outer annular wall 33; the protruding end of the guide post 62 is adapted to slidably engage with the ramp groove 611, and drive the guide post 62 to move radially close to the first sealing portion 51.

The back of each subsection 11 is provided with a guide post 62, each guide post 62 is correspondingly provided with a slope groove 611, the slope groove 611 extends along the axial direction and is circumferentially arranged on the inner wall of the sliding sleeve 61, and the guide post 62 can only move radially after penetrating through a guide hole on the outer annular wall 33; in fig. 2, the protruding end, i.e. the top end, of the guide post 62 is not slidably connected with the ramp groove 611, when the sliding sleeve 61 moves rightwards, the groove top of the ramp groove 611 contacts and presses against the top end of the guide post 62, and the guide post 62 is driven to move downwards in the radial direction to be close to the first sealing part 51, so that the first pressing head 1 presses and tightens the first sealing part 51; when the joint is disassembled, the sliding sleeve 61 is moved leftwards, the pressing of the slope groove 611 to the guide post 62 is released, the first pressure head 1 does not press the first sealing part 51 any more, and the pipe fitting 4 to be connected can be moved out of the annular groove 31.

The inner and outer

annular walls

32 and 33 are integrally connected by a connecting ring 34. Generally, the inner wall 32, the outer wall 33 and the connecting ring 34 are integrally formed, and the annular groove 31 is defined by the inner wall 32, the outer wall 33 and the connecting ring 34.

As a specific embodiment of the large-diameter thin-walled tube fitting connection joint provided by the present invention, please refer to fig. 1 and 3, the second pressing head 2 is located between the subsection 11 and the outer annular wall 33, the second pressing head 2 is fixedly connected to the sliding sleeve 61 through the connecting block 63, the outer annular wall 33 is provided with the guiding groove 331 for the connecting block 63 to pass through, and the connecting block 63 is slidably connected to the outer annular wall 33 and axially moves by means of the guiding groove 331.

Specifically, the second ram 2 is an annular pressing ring, and the number of the connecting blocks 63 is multiple and is distributed along the circumferential direction of the outer annular wall 33; one end of the connecting block 63 is fixedly connected with the second pressure head 2, the other end is fixedly connected with the sliding sleeve 61, and the connecting block 63 moves axially under the constraint of the guide groove 331, so that the second pressure head 2 is driven to axially approach the second sealing part 52 and is tightly pressed on the bottom surface of the annular groove 31; the second ram 2 is located between the outer annular wall 33 and the sub-section 11 and therefore does not interfere with the sub-section 11 approaching the first seal 51, ensuring that the sub-section 11 can successfully pinch the first seal 51.

In this embodiment, when the sliding sleeve 61 moves, the second pressure head 2 can be driven to move through the connecting block 63, and the slope groove 611 can also support the guide column 62, so as to drive the sliding sleeve 61 to move, that is, the sliding sleeve 61 can drive the first pressure head 1 and the second pressure head 2 to move simultaneously, and respectively compress the first sealing portion 51 and the second sealing portion 52, thereby realizing the sealing connection between the connecting assembly and the pipe fitting 4 to be connected.

As the utility model provides a heavy-calibre thin-walled tube spare attach fitting's a concrete implementation mode, sliding sleeve 61's one end is connected with the driving piece, and the driving piece is used for driving sliding sleeve 61 axial displacement. During connection, the sliding sleeve 61 needs to be driven to move axially, so that the connection assembly is connected with the pipe fitting 4 to be connected in a sealing manner. Specifically, the sliding sleeve 61 can be driven to move axially by an external tool, and the sliding sleeve 61 can also be driven to move axially by the driving piece provided in the embodiment; the driving piece generally forms an integral product as a part, so that driving force can be generated by the driving piece during connection without an external tool, and convenience and rapidness are realized.

As a specific embodiment of the large-diameter thin-wall pipe fitting connection joint provided by the present invention, please refer to fig. 2 and 3, the driving member is a sleeve 7 with a threaded hole, and the sleeve 7 is disposed on the outer annular wall 33 through a threaded connection. Be equipped with the external screw thread section with the screw hole adaptation of sleeve 7 in the main part, and can follow the smooth slip of main part outer wall for sliding sleeve 61, the main part outer wall sets up the external diameter that external screw thread section department slightly is less than one section ring body external diameter with sliding sleeve 61 sliding connection. Through the threaded connection of sleeve 7 and main part, can conveniently and reliably provide the axial drive power for sliding sleeve 61.

As a specific embodiment of the large-diameter thin-wall pipe fitting joint provided by the present invention, please refer to fig. 2 and 3, the sleeve 7 and the sliding sleeve 61 are relatively arranged in a rolling manner around the axis, and the sleeve 7 is used for driving the sliding sleeve 61 to move in the axial direction. Specifically, in other embodiments, the sleeve 7 and the sliding sleeve 61 can be slidably connected, but the relative rolling arrangement provided in this embodiment is more stable and reliable, and the connection is smoother.

As a specific implementation manner of the large-diameter thin-wall pipe fitting joint provided by the present invention, please refer to fig. 2 and fig. 3, a connecting member 9 is disposed between the sleeve 7 and the sliding sleeve 61, one end of the connecting member 9 is fixedly connected to the sliding sleeve 61, and the other end of the connecting member 9 is connected to the sleeve 7 by rolling members 8. The connecting piece 9 can conveniently realize the rolling connection between the sleeve 7 and the sliding sleeve 61, and is convenient to assemble. Specifically, the sleeve 7 and the connecting piece 9 are both annular bodies with L-shaped sections, and one end of the connecting piece 9 connected with the sliding sleeve 61 can be fixedly connected with the sliding sleeve 61 in a welding mode, a threaded connection mode and the like; the connecting piece 9 is connected with one end of the sleeve 7, both are provided with vertical connecting surfaces, and the rolling piece 8 is arranged between the two vertical connecting surfaces in a rolling way; the rolling elements 8 may be conventional parts such as balls or needles.

In fig. 2 and 3, when the sleeve 7 moves rightwards, the first pressing head 1 and the second pressing head 2 are driven to press the sealing elements, and the resistance is high, so that the rolling element 8 is arranged at the right side, and the friction force between the sleeve 7 and the connecting element 9 is prevented from being too large, so that the sleeve 7 is prevented from being difficult to rotate; when first pressure head 1 and second pressure head 2 need be loosened, sleeve 7 removes left, and the resistance is less, and sleeve 7 ground left end face and sliding connection of right end face of sliding sleeve 61 are comparatively smooth and easy, need not set up rolling member 8 between the two.

Referring to fig. 1 and 4, the sub-segments 11 are arc-shaped and six in number. In this embodiment, the pipe 4 to be connected is a circular pipe, and the sealing member, the inner annular wall 32, the outer annular wall 33, the annular groove 31, and the like are all circular rings adapted to the pipe 4 to be connected. In other embodiments, the pipe 4 to be connected may be a square pipe, and accordingly, the sub-segments 11 are linear.

As the utility model provides a heavy-calibre thin-walled tube spare attach fitting's a concrete implementation mode, heavy-calibre thin-walled tube spare attach fitting still includes the body, and the body is straight line shape, bending type, T-shaped or cross, and the open end of body is equipped with coupling assembling. The pipe body is hollow, when the pipe body is in a straight line shape and a bent shape, the pipe body is provided with two opening ends, and the large-caliber thin-wall pipe fitting connecting joint can be connected with two pipe fittings 4 to be connected; when the pipe body is bent, the large-caliber thin-wall pipe fitting connecting joint is generally called an elbow joint; when the pipe body is T-shaped, the pipe wall is provided with three open ends, and the large-caliber thin-wall pipe fitting connecting joint is generally called a three-way joint and can be connected with three pipe fittings 4 to be connected; when the pipe body is in a cross shape, the pipe wall is provided with four opening ends, and the large-caliber thin-wall pipe fitting connecting joint is generally called a four-way joint and can be connected with four pipe fittings 4 to be connected.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Heavy-calibre thin-walled tube spare attach fitting, its characterized in that is equipped with coupling assembling, coupling assembling includes:

the pipe fitting connecting device comprises a main body, a connecting piece and a connecting piece, wherein the main body is provided with an annular groove, the annular groove is used for inserting a pipe fitting to be connected, and the inner annular wall of the annular groove is used for supporting the pipe wall of the pipe fitting to be connected from the inside of the pipe fitting to be connected;

the sealing element is sleeved on the pipe fitting to be connected and positioned in the annular groove, and comprises a first sealing part and a second sealing part;

the first pressure head is arranged in the annular groove, moves in the radial direction and is used for pressing the first sealing part on the outer wall of the pipe fitting to be connected; and

and the second pressure head is arranged in the annular groove and moves axially, and is used for pressing the second sealing part at the bottom of the annular groove.

2. The large caliber thin walled tube fitting connection according to claim 1, wherein the first ram is annular and is comprised of a plurality of sub-segments that are radially displaced by the locking assembly to move toward and pinch the first seal or away from the first seal.

3. The large caliber thin walled tube fitting connection according to claim 2, wherein the outer annular wall of the annular groove is located outside the subsection and is integrally connected to the inner annular wall, and the locking assembly comprises:

the sliding sleeve is sleeved on the outer ring wall in a sliding mode, and a slope groove is formed in the inner wall of the sliding sleeve;

the guide column is fixedly arranged on the back of the subsection along the radial direction and penetrates through a guide hole formed in the outer ring wall to be in sliding connection with the outer ring wall; the extending end of the guide column is in sliding contact with the slope groove and drives the guide column to move radially and close to the first sealing part.

4. The large-caliber thin-walled tube connecting joint as claimed in claim 3, wherein the second pressing head is located between the subsection and the outer annular wall, the second pressing head is fixedly connected with the sliding sleeve through a connecting block, a guide groove for the connecting block to pass through is formed on the outer annular wall, and the connecting block is slidably connected with the outer annular wall through the guide groove and moves axially.

5. The large-caliber thin-walled tube fitting connection joint as claimed in claim 4, wherein a driving member is connected to one end of the sliding sleeve, and the driving member is used for driving the sliding sleeve to move axially.

6. The large-caliber thin-walled tube fitting connection according to claim 5, wherein the driving member is a socket having a threaded hole, and the socket is disposed on the outer annular wall by a threaded connection.

7. The large-caliber thin-walled tube fitting connection joint as claimed in claim 6, wherein the sleeve and the sliding sleeve are arranged to roll relative to each other about an axis, and the sleeve is adapted to axially move the sliding sleeve.

8. The large-caliber thin-walled tube connecting joint as claimed in claim 7, wherein a connecting member is provided between the sleeve and the sliding sleeve, one end of the connecting member is fixedly connected with the sliding sleeve, and the other end of the connecting member is connected with the sleeve in a rolling manner through a rolling member.

9. The large caliber thin walled tube fitting connection of claim 2, wherein the sub-segments are arcuate and six in number.

10. The large-caliber thin-walled tube connecting joint as claimed in any one of claims 1 to 9, wherein the large-caliber thin-walled tube connecting joint further comprises a tube body, the tube body is straight, bent, T-shaped or cross-shaped, and the connecting component is arranged at the open end of the tube body.