Pipe expansion connecting piece

Abstract

The utility model discloses a pipe expansion connecting piece, which belongs to the technical field of pipe connection, and comprises an expansion piece, a connecting piece and a connecting piece, and is characterized in that the expansion piece comprises a driving part, an expansion deformation part and a fixing part which are connected in sequence; the driving part is matched with the expansion part; when the connecting device is used for connecting two pipes, the driving part is located in one pipe of the two pipes, and the fixing part is located at the end, away from the connecting end, of the other pipe of the two pipes. The driving part drives the driving part to move towards the fixing part so as to drive the expansion deformation part to conduct expansion deformation to be clamped in the pipe where the driving part is located, and connection of the two pipes is achieved. The utility model has an integrated structure, avoids the falling phenomenon in the installation process, and is simple and convenient to operate and high in working efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipe connection technical field, especially, relate to a pipe expansion connecting piece. BACKGROUND

[0002] In the pipe connection product, the pipe usually needs to be connected.

[0003] In the prior art, there are many kinds of connecting fittings between pipes, and the commonly used one is the expansion rod and expansion mother matched form for connecting pipes, and the expansion mother and expansion rod often fall off during use, especially when the pipe is long, the operator needs to install the expansion mother and expansion rod again, which is extremely inconvenient to operate. UTILITY MODEL CONTENTS

[0004] In order to solve the above problems, the utility model adopts the following technical scheme:

[0005] A pipe expansion connecting piece, comprising:

[0006] An expansion piece, comprising a driving part, an expansion deformation part and a fixed part connected in sequence;

[0007] A driving piece matched with the expansion piece;

[0008] When connecting two pipes, the driving part is located in one of the two pipes, and the fixed part is located at one end of the other pipe away from the connection end; the driving piece drives the driving part to move towards the fixed part, so as to drive the expansion deformation part to expand and deform and be clamped in the pipe where the driving part is located, thereby realizing the connection of the two pipes.

[0009] Further, the expansion piece comprises a hollow cylindrical body, driving plates and fixed plates arranged at both ends of the cylindrical body, and the cylindrical body, the driving plates and the fixed plates are arranged in an integrated structure; a plurality of openings are uniformly arranged on the cylindrical body in the circumferential direction; when connecting two pipes, the driving piece drives the driving plates to move towards the fixed plates, so as to drive the cylindrical wall of the cylindrical body to deform and be clamped in the pipe.

[0010] Further, the cylindrical body is a prism, a cylinder or a geometric column.

[0011] Further, the driving piece is a bolt, the fixed plate is provided with a through hole through which the screw rod of the bolt passes, and the driving plate is provided with a threaded hole matched with the screw rod of the bolt.

[0012] Further, the outer contour of the fixed plate is larger than the outer contour of the pipe.

[0013] Further, the opening of the column axially extends to the driving plate and the fixed plate.

[0014] Further, a deformation groove is pre-set on the column wall of the column.

[0015] Further, a first deformation groove is arranged at the connection between the column and the driving plate, a second deformation groove is arranged at the connection between the column and the fixed plate, and a third deformation groove is arranged at the middle position of the column.

[0016] Further, the first deformation groove and the second deformation groove are located on the outer side of the column, and the third deformation groove is located on the inner side of the column.

[0017] Beneficial effects:

[0018] The pipe expansion connecting piece is of an integrated structure, avoids falling phenomenon in the installation process, is simple and convenient to operate, and is high in working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the pipe expansion connecting piece of the utility model;

[0020] Figure 2 is another perspective view of the pipe expansion connecting piece of the utility model;

[0021] Figure 3 is a front view of the pipe expansion connecting piece of the utility model;

[0022] Figure 4 is Figure 3 is a middle A-A sectional view;

[0023] 1, a driving member; 2, a fixed plate; 3, a column; 4, a first deformation groove; 5, a driving plate; 6, an opening; 7, a third deformation groove; 8, a second deformation groove. DETAILED DESCRIPTION

[0024] Example 1

[0025] Reference Figure 1 - Figure 4 A pipe expansion connecting piece, comprising:

[0026] An expansion member, the expansion member comprising a driving portion, an expansion deformation portion and a fixed portion connected in sequence;

[0027] A driving member 1, the driving member 1 cooperating with the expansion member;

[0028] Wherein, when used for the connection between two pipes, the driving part is located in one of the two pipes, and the fixing part is located at the end of the other pipe away from the connection end; the driving member 1 drives the driving part to move towards the fixing part, so as to drive the inflation deformation part to inflate and deform and be clamped in the pipe where the driving part is located, thereby realizing the connection between the two pipes.

[0029] In this embodiment, the inflation member includes a hollow structure column 3, a driving plate 5 and a fixing plate 2 arranged at both ends of the column 3, and the column 3, the driving plate 5 and the fixing plate 2 are arranged in an integrated structure; a plurality of openings 6 are uniformly arranged on the column 3 in the circumferential direction; when used for the connection between two pipes, the driving member 1 drives the driving plate 5 to move towards the fixing plate 2, so as to drive the column wall of the column 3 to deform and be clamped in the pipe.

[0030] Specifically, the column 3 is a prism, a cylinder or a geometric column, and is preferably a polygonal prism.

[0031] Further, the column 3 is a hexagonal prism, and the column 3 is provided with three openings 6, and the driving plate 5 and the fixing plate 2 are also provided in a hexagonal structure.

[0032] In this embodiment, the driving member 1 is a bolt, the fixing plate 2 is provided with a through hole through which the screw rod of the bolt passes, and the driving plate 5 is provided with a threaded hole matched with the screw rod of the bolt.

[0033] In this embodiment, the outer contour of the fixing plate 2 is larger than the outer contour of the pipe.

[0034] In this embodiment, the openings 6 of the column 3 extend axially to the driving plate 5 and the fixing plate 2.

[0035] In this embodiment, the column wall of the column 3 is provided with a deformation groove.

[0036] Specifically, the connection between the column 3 and the driving plate 5 is provided with a first deformation groove 4, the connection between the column 3 and the fixing plate 2 is provided with a second deformation groove 8, and the middle position of the column 3 is provided with a third deformation groove 7.

[0037] Wherein, the first deformation groove 4 and the second deformation groove 8 are located on the outside of the column, and the third deformation groove 7 is located on the inside of the column; the first deformation groove 4 and the second deformation groove 8 are preferably single-sided 45-degree grooves, and the third deformation groove 7 is preferably a symmetrically arranged 90-degree triangular groove, and the groove depth is 1 / 4-1 / 2 of the column wall, preferably 1 / 3.

[0038] In use, the bolt is rotated by using a tool, and since the screw rod of the bolt is threadedly matched with the threaded hole of the driving plate 5, the driving plate 5 is driven to move towards the fixing plate 2, and in turn drives the column 3 to expand and deform axially at the first deformation groove 4, the second deformation groove 8 and the third deformation groove 7, thereby realizing the connection between the two pipes.

[0039] According to actual use, the driving member 1 can also be a rope, such as a steel wire rope, one end of which is connected with the fixed plate 2, and the other end extends to the outside of the pipe material and is drivenly connected with a driving device, such as a hydraulic cylinder, an air cylinder, etc., after the driving plate 5 moves to a preset position, the steel wire rope is fixed on the fixed plate 2 after the column wall of the column body 3 is expanded and deformed.

[0040] The above is only the preferred embodiment of the present application, and does not limit the technical scope of the present application in any way. Therefore, any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A tubular expansion joint, characterized by, The utility model relates to a pipe connecting device, including: an expansion piece comprising a driving part, an expansion deformation part and a fixing part connected in sequence; a driving piece cooperating with the expansion piece; wherein, when used for connecting two pipes, the driving part is located in one of the two pipes, and the fixing part is located at one end of the other pipe away from the connecting end; the driving piece drives the driving part to move towards the fixing part, so as to drive the expansion deformation part to expand and deform and be clamped in the pipe where the driving part is located, thereby realizing the connection of the two pipes.

2. The pipe expansion joint of claim 1, wherein, The expansion piece comprises a hollow cylindrical body, a driving plate and a fixing plate arranged at both ends of the cylindrical body, and the cylindrical body, the driving plate and the fixing plate are arranged in an integrated structure; a plurality of openings are uniformly arranged on the cylindrical body in the circumferential direction; when used for connecting two pipes, the driving piece drives the driving plate to move towards the fixing plate, so as to drive the cylindrical wall of the cylindrical body to deform and be clamped in the pipe.

3. The tubular inflation joint of claim 2, wherein, The cylindrical body is a prism, a cylinder or a geometric cylinder.

4. The tubular inflation fitting of claim 2, wherein, The driving piece is a bolt, the fixing plate is provided with a through hole through which the screw rod of the bolt passes, and the driving plate is provided with a threaded hole cooperating with the screw rod of the bolt.

5. The tubular inflation fitting of claim 2, wherein, The outer contour of the fixing plate is larger than the outer contour of the pipe.

6. The tubular inflation fitting of claim 2, wherein, The openings of the cylindrical body axially extend to the driving plate and the fixing plate.

7. The pipe expansion joint of claim 6, wherein, The cylindrical wall of the cylindrical body is provided with a deformation groove.

8. The tubular inflation fitting of claim 7, wherein, The connection between the cylindrical body and the driving plate is provided with a first deformation groove, and the connection between the cylindrical body and the fixing plate is provided with a second deformation groove; a third deformation groove is arranged at the middle position of the cylindrical body.

9. The pipe expansion joint of claim 8, wherein, The first deformation groove and the second deformation groove are located on the outside of the cylindrical body, and the third deformation groove is located on the inside of the cylindrical body.

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