CN114589222A

CN114589222A - Auxiliary pipe bending mechanism and pipe bending device

Info

Publication number: CN114589222A
Application number: CN202210251235.2A
Authority: CN
Inventors: 杨岸陆
Original assignee: SHANGHAI GENTECH CO Ltd; Jiangsu Zhengfan Semiconductor Equipment Co ltd
Current assignee: SHANGHAI GENTECH CO Ltd; Jiangsu Zhengfan Semiconductor Equipment Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-06-07

Abstract

The application discloses supplementary return bend mechanism and swan neck system to solve the technical problem of return bend angular deviation among the prior art. The utility model provides an supplementary return bend mechanism includes: at least one telescopic link, a chuck assembly, an angle disc and a tube clamping assembly. The chuck assembly comprises two connecting seats, one connecting seat is connected with one end of one telescopic connecting rod, and the chuck assembly is used for clamping the bent pipe disc between the connecting seats; the angle disc comprises an inner disc and an outer ring, and the outer ring is connected with the other end of the telescopic connecting rod; the inner circular disc is rotatably arranged in the outer circular ring; the center of the inner disc is provided with a containing hole; the pipe clamping assembly is arranged on the inner circular disc, is positioned on the outer side of the containing hole and is used for clamping the pipe fitting passing through the containing hole. Therefore, the angle is accurate when the pipe bending machine is used for bending the pipe, and the labor is saved.

Description

Auxiliary pipe bending mechanism and pipe bending device

Technical Field

The application relates to the technical field of auxiliary tools, in particular to an auxiliary pipe bending mechanism and a pipe bending device.

Background

In the prior art, gas raw materials are required to be used in factory manufacturing, and gas transportation pipelines for communicating the devices are required to be designed for transporting the gas raw materials among the devices in the manufacturing process. Therefore, during the equipment manufacturing and installation phase, the operator needs to perform a process of configuring the piping, bending the piping to allow the gas to flow according to the transportation route plan during the subsequent processing.

The existing pipe bending method is generally used for bending a pipe fitting by an operator by using a commonly-used pipe bender on the market. The pipe bender comprises a pressing rod, a pipe bending disc and an auxiliary rod, after the auxiliary rod is fixed by an operator, the operator refers to the angle scale on the pipe bending disc to apply force to the pressing rod, so that the pipe fitting accommodated between the pressing rod and the pipe bending disc is bent, and only the fixed angle between the bent pipe fitting and the adjacent part can be realized. When a fixed angle is formed between the pipe fitting and one end of an existing corner at intervals, due to the fact that the diameter of the existing pipe fitting is thick, bending is labor-consuming, or an auxiliary reference angle tool is lacked, the problem that deviation of bending direction is large is easily caused by operating personnel in the force application process of the bent pipe, and after the pipe fitting is adjusted for many times, the pipeline is easily damaged, and raw materials of the pipe fitting are wasted.

Disclosure of Invention

An object of the application is to provide an auxiliary pipe bending mechanism and a pipe bending device, which can realize the angle fixation when a pipeline is bent through the auxiliary pipe bending mechanism, and reduce the occurrence of bending angle deviation.

The embodiment of the application is realized as follows:

the present application provides in a first aspect an auxiliary pipe bending mechanism, including: at least one telescopic link, a chuck assembly, an angle disc and a tube clamping assembly. The clamping disc assembly is used for clamping a bent pipe disc between the connecting seats; the angle disc comprises an inner disc and an outer ring, and the outer ring is connected with the other end of the telescopic connecting rod; the inner disc is rotatably arranged in the outer ring; the center of the inner disc is provided with a containing hole; the pipe clamping assembly is arranged on the inner circular disc, is positioned on the outer side of the containing hole and is used for clamping the pipe fitting passing through the containing hole.

In one embodiment, a tube clamping assembly comprises: the pipe fitting clamping pieces are arranged on the inner circular disc; the first moving member is arranged on the inner disc and arranged on one side of the pipe fitting clamping piece.

In one embodiment, the first moving member is a screw, the pipe clamping piece is provided with a thread part, and the thread part is arranged in the first groove on the inner disc; the inner disc is also provided with a second groove, and the screw rod is arranged in the second groove; and the screw is connected with the threaded part at the communication position of the first groove and the second groove.

In one embodiment, the chuck assembly further comprises: a plurality of chuck clamping pieces and a plurality of second moving pieces. A chuck clamping piece is arranged on a connecting seat; a second moving member is disposed on a connecting base and on one side of the chuck clamping piece.

In one embodiment, the second moving member is a screw, the chuck clamping piece has a threaded portion, and the threaded portion is arranged in a third groove on the connecting seat; a fourth groove is formed in the connecting seat, and the screw is arranged in the fourth groove; and the screw is connected with the threaded part at the communication part of the third groove and the fourth groove.

In one embodiment, the inner disc has a first surface, and the outer edge of the first surface is provided with angle scales.

In one embodiment, a circular groove is formed around the outer side wall of the inner disc, a circular protrusion is formed around the inner side wall of the outer ring, and the circular protrusion is accommodated in the circular groove when the inner disc is connected with the outer ring.

In one embodiment, the two telescopic links are parallel and equal in length, so that the connecting seat is parallel to the inner circular disc.

In one embodiment, the outer ring comprises two outer half rings, and the outer half rings are connected through a connecting rod and surround the outer side of the inner disc.

A second aspect of embodiments of the present application provides a pipe bending device, which includes a pipe bender and an auxiliary pipe bending mechanism in any of the embodiments of the first aspect of the present application. Wherein the pipe bender is used for bending the pipe fitting; the chuck assembly of the auxiliary pipe bending mechanism clamps the pipe bender to fix the pipe bending direction.

Compared with the prior art, the beneficial effect of this application is: the angle fixing device has the advantages that the chuck assembly, the angle disc and the pipe clamping assembly of the auxiliary pipe bending mechanism are matched, so that the bending direction of the pipe bender and the angle of the reference part of the pipe fitting are fixed in the pipe fitting bending process; this application has still realized the bending of different positions on the same axis of pipe fitting through telescopic link. The problem of the pipe fitting bending angle deviation that causes because of the application of force is great or the pipe fitting rocks among the operating personnel return bend process has been solved to this application, has improved work quality and work efficiency, has reduced the inaccurate raw and other materials waste that cause of pipe fitting bending.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic view of an elbow device according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a elbow device according to an embodiment of the present application;

FIG. 3 is an overall exploded view of the auxiliary elbow mechanism shown in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an angle disk according to an embodiment of the present disclosure;

FIG. 5 is a schematic partially exploded view of an auxiliary elbow mechanism according to an embodiment of the present application;

FIG. 6 is a schematic view of another perspective of the angle disk according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram illustrating a chuck assembly according to an embodiment of the present application.

Reference numerals: 1-a pipe bending device; 10-auxiliary pipe bending mechanism; 101-a first groove; 102-a second groove; 103-a third groove; 104-a fourth groove; 11-a telescopic link; 12-a chuck assembly; 121-a connecting seat; 122-a chuck jaw; 1221-a second threaded portion; 123-a second moving part; 13-angle disk; 1301-a first surface; 1302-a pointer; 1303-angle scale; 1304-a second surface; 131-inner disc; 1311-inner half-disc; 132-outer ring; 1321-outer half ring; 134-containing hole; 1341-a receiving groove; 135-connecting hole; 1361-annular projection; 1362-annular groove; 137-connecting rod; 1370-a fixed seat; 14-a tube clamping assembly; 141-a tubular clip; 1411-a first threaded portion; 142-a first moving member; 20-a pipe bender; 200-hanging hook; 201-connecting rod; 202-a guide groove; 203-a receiving hole; 21-a pipe bending disc; 22-a compression bar; 221-briquetting; 23-an auxiliary rod; 30-a pipe fitting; 31-a reference portion; 32-a portion to be bent; 33-spacer.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

With the development of the semiconductor industry and the new energy industry, various processing plants are in operation. The raw materials for factory manufacturing are mainly bulk gas and high purity gas of composite chips or solar panels. The process of arranging the bent pipeline is a key in the whole manufacturing process as the stainless pipeline is used as an important material for connecting the front end of the factory manufacturing equipment with the rear end of the gas material supply.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a pipe bending device 1 according to an embodiment of the present application. As shown in fig. 1, the tube bending apparatus 1 includes a tube bender 20 and an auxiliary tube bending mechanism 10. The auxiliary pipe bending mechanism 10 has one end for clamping the pipe 30 and the other end for clamping the pipe bender 20.

Referring to fig. 2, fig. 2 is an exploded view of a pipe bending device 1 according to an embodiment of the present application. As shown in fig. 2, tube bender 20 includes a tube bending disk 21, a press rod 22, and an auxiliary rod 23. One end of the pressing rod 22 is a pressing block 221, and the pressing block 221 is connected with the axis of the pipe bending disk 21 through a connecting rod 201, so that the pressing rod 22 can rotate around the axis of the pipe bending disk 21 outside the pipe bending disk 21 and apply force to bend the pipe. A guide groove 202 is formed between the pipe bending disk 21 and the pressing block 221, the guide groove 202 is formed in the peripheral side wall of the pipe bending disk 21 and used for accommodating the pipe fitting 30 to be bent, and the pipe fitting 30 is bent along the guide groove 202 under the force of the pressing rod 22 during pipe bending.

An auxiliary rod 23 is fixedly connected with one end of the elbow plate 21; the other end of the bending disk 21 is provided with a hook 200, the hook 200 is provided with a receiving hole 203 for allowing the pipe 30 to pass through, and the hook 200 clamps the fixed position of the pipe 30 to be bent through the receiving hole 203.

The pipe member 30 includes a portion to be bent 32, a spacer 33, and a reference portion 31. Referring to fig. 1 and 2, in an operation process, the hook 200 of the pipe bender 20 is movable, and after the pipe 30 to be bent extends into the guide groove from the receiving hole 203, the hook 200 blocks the spacing portion 33 of the pipe 30 to be bent, so that the portion 32 to be bent is perpendicular to a side surface (which may also be a zero-scale direction on the pipe bending plate 21) of the hook 200. So that the bending part 32 and the spacing part 33 form an accurate included angle on the bent pipe 30.

In addition, the pipe bending disk 21 of the pipe bender 20 is held by the auxiliary pipe bending mechanism 10, and the surface of the hook 200 on the side of the receiving hole 203 abuts against one end of the auxiliary pipe bending mechanism 10, so as to ensure that the spacing portion 33 of the pipe to be bent 30 accommodated in the pipe bender is always perpendicular to the angle disk 13 (please refer to fig. 3) after the pipe bending direction of the pipe bender is held and fixed by the auxiliary pipe bending mechanism, so that the movement of the spacing portion 33 caused by the local sliding of the pipe bender 20 is minimized, and the accuracy of the fixed included angle formed by the projection of the axis of the part to be bent and the axis of the reference portion on the plane perpendicular to the spacing portion 33 after the pipe bending is improved.

Referring to fig. 3, fig. 3 is an overall exploded schematic view of the auxiliary pipe bending mechanism 10 according to an embodiment of the present application; as shown in fig. 3, the auxiliary tube bending mechanism 10 includes a telescopic link 11, a chuck assembly 12, an angle disk 13, and a tube clamping assembly 14. Two telescopic connecting rods 11 are provided, one end of each telescopic connecting rod 11 is connected with the connecting seat 121 of the chuck plate assembly 12, and the other end of each telescopic connecting rod 11 is connected with the angle disc 13. The tube clamping assembly 14, the telescopic link 11 and the chuck assembly 12 are respectively arranged on opposite surfaces of the angle disc 13 and are separated by the angle disc 13.

The telescopic link 11 is telescopic to change the length, so that the operator can adjust the distance between the part to be bent 32 and the reference part 31, namely the length of the spacing part 33 of the pipe 30. Bending of the tube 30 at different positions on the same axis is achieved.

When the lengths of the telescopic links 11 are changed, the two telescopic links 11 are kept parallel and equal in length, so that the adjacent two faces of the connecting seat 121 and the angle disc 13 of the chuck assembly 12 are kept parallel, and further the connecting seat 121 and the angle disc 13 are kept parallel, therefore, when an operator fixes the pipe 30, the spacing part 33 of the pipe 30 is kept vertical relative to the plane of the angle disc 13.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an angle disc 13 according to an embodiment of the present application; as shown in fig. 4, the angle disc 13 includes an inner disc 131 and an outer ring 132, the inner disc 131 has a first surface 1301, an angle scale 1303 is provided on an outer edge of the first surface 1301, and the outer ring 132 has a pointer 1302 for indicating an angle.

The outer ring 132 is provided with a connecting hole 135, and the outer ring 132 is connected with the other end of the telescopic link 11 through the connecting hole 135, so that the chuck assembly 12 is fixed on the outer ring 132 through the telescopic link 11; the inner disc 131 is disposed inside the outer ring 132 and rotatable with respect to the outer ring 132, and the inner disc 131 is centrally provided with a receiving hole 134 for receiving the pipe 30.

Referring to fig. 5, fig. 5 is a schematic partial exploded view of the auxiliary pipe bending mechanism 10 according to an embodiment of the present application; as shown in fig. 5, the inner disc 131 includes two structurally symmetrical inner half discs 1311 and the outer ring 132 includes two structurally symmetrical outer half rings 1321. The inner disk 131 also has a second surface 1304, the second surface 1304 being opposite the first surface 1301.

The side surfaces of the two inner half discs 1311 are provided with accommodating grooves 1341, and when the inner half discs 1311 are connected and spliced into the inner disc 131, the two accommodating grooves 1341 form a circular accommodating hole 134. Each inner half ring is provided with a first groove 101 and a second groove 102, and the first groove 101 and the second groove 102 are disposed on the second surface 1304. The second groove 102 is communicated with the accommodating groove 1341 and the first groove 101 at different positions respectively.

An annular groove 1362 is formed on the periphery of the outer side walls of the two inner half discs 1311, and an annular protrusion 1361 is formed on the periphery of the inner side wall of the outer half ring 1321. When the inner disc half 1311 and the outer ring half 1321 are assembled to form the integrated inner disc 131 and outer ring 132, the annular protrusion 1361 is received in the annular groove 1362. The outer half ring 1321 receives and connects the inner disc 131 to the outer ring 132 through the connecting rod 137 and the fixing base 1370.

The pipe clamping assembly 14 includes pipe clamping pieces 141 and first moving parts 142, one pipe clamping piece 141 is disposed in one first groove 101, and one first moving part 142 is disposed in one second groove 102 and is disposed at one end of the pipe clamping piece 141 to drive the pipe clamping piece 141 to move.

In one embodiment, the pipe clip 141 has a first thread portion 1411, and the first moving member 142 is a screw rod, and the screw rod is connected to the first thread portion 1411 at a communication position between the first groove 101 and the second groove 102, so that when an operator rotates the screw rod, the pipe clip 141 moves.

In an operation process, an operator loads the pipe clamping pieces 141 and the first moving pieces 142 from the accommodating groove 1341 to the first groove 101 and the second groove 102, the two pipe clamping pieces 141 can be driven by the corresponding first moving pieces 142 to approach or move away from each other, then the two inner half discs 1311 are spliced to form the inner disc 131, and the accommodating groove 1341 is combined to form the accommodating hole 134. After the inner disc 131 is assembled, the two outer half rings 1321 are assembled into one outer ring 132 and surround the outer side of the inner disc 131, the annular protrusion 1361 on the inner side wall of the outer ring 132 is received in the annular groove 1362 on the outer side wall of the inner disc 131 to ensure that the inner ring and the outer ring 132 do not slide axially to loosen the components of the auxiliary bending mechanism 10, and the cooperation of the annular protrusion 1361 and the annular groove 1362 can provide a track guiding effect for the relative rotation of the inner disc 131 and the outer ring 132.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another view angle of the angle disc 13 according to an embodiment of the present application; as shown in fig. 6, the tube clamping assembly 14 is disposed on the second surface 1304 of the inner disc 131 and outside the receiving hole 134 for clamping the tube 30 passing through the receiving hole 134.

Referring to fig. 1 and 6, in an embodiment, the pipe clamping pieces 141 clamp the connecting corners of the reference portion 31 and the spacing portion 33, and the bending direction of one end of each of the two pipe clamping pieces 141 is an extending direction of a projection line formed by projecting the axis of the reference portion 31 on the angle disk 13, and the extending direction substantially coincides with the "0" angle scale 1303 on the angle disk 13.

Referring to fig. 7, fig. 7 is a schematic structural diagram of the chuck assembly 12 according to an embodiment of the present disclosure. As shown in fig. 7, the chuck assembly 12 includes two connecting bases 121 symmetrically arranged, two chuck clamping pieces 122 and two second moving pieces 123, one chuck clamping piece 122 is disposed on one connecting base 121, one second moving piece 123 is disposed on one connecting base 121 and on one side of the chuck clamping piece 122, and the chuck clamping pieces 122 on the two connecting bases 121 are symmetrically arranged with the second moving pieces 123.

Each connecting seat 121 is provided with a third groove 103 and a fourth groove 104, the chuck clamping piece 122 is disposed in the third groove 103, and the second moving piece 123 is disposed in the fourth groove 104. In one embodiment, the second moving member 123 may be a screw, and the chuck jaw 122 has a second thread portion 1221; at the connection between the third recess 103 and the fourth recess 104, the screw is connected to the second thread 1221, so that when the screw rotates, the chuck jaws 122 move.

Referring to fig. 1 to 7, in an operation process, an operator extends the spacing portion 33 and the portion to be bent 32 of the pipe 30 to be bent into the receiving hole 134 from between the pipe clamping pieces 141 at one end of the auxiliary pipe bending mechanism 10, and then extends from the first surface 1301 of the angle disc 13, and the portion to be bent 32 of the pipe 30 extends into the guiding groove 202. The operator rotates or pulls the first moving member 142 of the pipe clamping assembly 14 to bring the pipe clamping pieces 141 closer to each other, so as to clamp the joint corner between the reference portion 31 and the spacing portion 33 of the pipe 30.

Then, after the operator fixes the distance required by the spacing portion 33 of the pipe 30 by lengthening or compressing the length of the telescopic link 11, the hook 200 is moved to clamp the pipe and the surface of the hook 200 on the side of the receiving hole 203 is abutted to the connecting seat 121, and simultaneously, the second moving member 123 on the chuck assembly 12 is adjusted to drive the chuck clamping pieces 122 to approach each other and clamp the opposite two surfaces of the pipe bending disk 21, so as to ensure that the spacing portion 33 is perpendicular to the first surface 1301 of the angle disk 13, and after the portion 32 to be bent of the pipe 30 is bent, the included angle between the axis where the spacing portion 33 is located and the axis where the spacing portion 33 is located is fixed and accurate.

The operator can also rotate the inner disc 131 or the outer ring 132 in advance to make the pointer 1302 point to the designated angle scale 1303. Meanwhile, because the chuck assembly 12 is fixed to the outer ring 132 by the telescopic link 11, the operator can align the bending direction of the pipe bender with the direction of the pointer 1302 on the outer ring 132: after the hook 200 is locked to the pipe 30 and fixed in position and the operator applies force to the press rod to bend the portion to be bent 32, the extending direction of the axis of the portion to be bent 32 when projected on the angle disk 13 coincides with the pointer 1302 of the outer ring 132.

After the connecting corner between the reference portion 31 and the spacing portion 33 of the pipe 30 is clamped by the pipe clamping piece 141, the extending direction of the axis of the reference portion 31 when projected on the angle disk 13 coincides with the "0" angle scale 1303 on the angle disk 13. Therefore, when the axis of the portion to be bent 32 and the axis of the reference portion 31 of the pipe 30 are projected to a surface perpendicular to the spacer 33 (e.g., the first surface 1301 or the second surface 1304 of the angle disk 13) after the pipe 30 is bent, the fixed angle formed by the projected line substantially coincides with the preset angle scale 1303. Meanwhile, the axis of the part to be bent 32 and the axis of the spacing part 33 can form a preset angle, so that bending of the preset angle of the multi-section pipeline in the space is realized.

According to the auxiliary pipe bending mechanism, the chuck assembly 12, the angle disc 13 and the pipe clamping assembly 14 of the auxiliary pipe bending mechanism 10 are matched, so that the axis of the bent part 32 to be bent on the pipe fitting 30 and the axis of other parts of the pipe fitting 30 are formed into different preset angles in different reference surface projections, and the diversified bending of the pipe fitting is realized; bending of the tube 30 at different positions on the same axis is also achieved by the telescopic links 11. This application has solved the problem of the pipe fitting 30 bending angle deviation that operating personnel return bend in-process because of the application of force is great or pipe fitting 30 rocks, has caused, has improved work quality and work efficiency, has reduced the accurate raw and other materials consume and the waste that causes of pipe fitting 30 bending. The auxiliary pipe bending mechanism 10 provided by the application can provide a reference direction for the pipe bending process when a plurality of corners are needed on the configuration pipe fitting 30, so that the engineering quality is improved, and the potential safety hazard is reduced.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An auxiliary pipe bending mechanism, comprising:

at least one telescopic link;

the clamping device comprises a chuck assembly and a clamping mechanism, wherein the chuck assembly comprises two connecting seats, one connecting seat is connected with one end of one telescopic connecting rod, and the chuck assembly is used for clamping a bent pipe disc between the connecting seats;

the angle disc comprises an inner disc and an outer ring, and the outer ring is connected with the other end of the telescopic connecting rod; the inner disc is rotatably arranged in the outer ring; the center of the inner circular disc is provided with a containing hole;

and the pipe clamping assembly is arranged on the inner circular disc, is positioned outside the accommodating hole and is used for clamping the pipe fitting passing through the accommodating hole.

2. The auxiliary elbow mechanism according to claim 1, wherein the pipe clamping assembly comprises:

a plurality of pipe clip pieces disposed on the inner circular disc;

the first moving pieces are arranged on the inner circular disc and are arranged on one side of the pipe fitting clamping piece.

3. The auxiliary elbow mechanism according to claim 2, wherein the first moving member is a threaded rod, the pipe clip having a threaded portion, the threaded portion being disposed in the first groove on the inner disc;

the inner disc is also provided with a second groove, and the screw rod is arranged in the second groove; and the screw is connected with the threaded part at the communication position of the first groove and the second groove.

4. The auxiliary elbow mechanism according to claim 1, wherein the chuck assembly further comprises:

a plurality of chuck clamping pieces, one of which is arranged on one of the connecting seats;

and one second moving member is arranged on one connecting seat and is arranged on one side of the chuck clamping piece.

5. The auxiliary elbow mechanism according to claim 4, wherein the second moving member is a screw, the chuck clamping piece has a threaded portion, and the threaded portion is disposed in a third groove on the connecting seat;

a fourth groove is further formed in the connecting seat, and the screw is arranged in the fourth groove; and the screw is connected with the threaded part at the communication part of the third groove and the fourth groove.

6. The auxiliary elbow mechanism according to claim 1, wherein the inner disc has a first surface with an angle scale on an outer edge of the first surface.

7. The auxiliary pipe bending mechanism according to claim 1, wherein an annular groove is formed around an outer side wall of the inner disc, an annular protrusion is formed around an inner side wall of the outer ring, and the annular protrusion is received in the annular groove when the inner disc is connected with the outer ring.

8. The auxiliary elbow mechanism according to claim 1, wherein the two telescopic links are parallel and equal in length so that the connecting base is parallel to the inner disk.

9. The auxiliary elbow mechanism according to claim 1, wherein the outer ring comprises two outer ring halves connected by a connecting rod and surrounding the outer side of the inner disc.

10. An elbow device, characterized in that the elbow device comprises:

the auxiliary elbow mechanism of any one of claims 1-9;

a tube bender for bending a tube;

the chuck assembly of the auxiliary pipe bending mechanism clamps the pipe bender to fix the pipe bending direction.