CN103216503B - Tubular product fastening connection accessory - Google Patents

Abstract

The invention discloses a pipe fastening connection fitting, which includes an expansion joint and a top wire for expanding the expansion joint. The expansion joint includes a connecting bottom plate, and a lifting plate is bent at the lower end of the connecting bottom plate. There are two side plates bent on both sides of the connecting bottom plate, and the upper ends of the two side plates are provided with a top plate bent to the upper part of the connecting bottom plate. One end of the jacking wire is screwed to the lifting plate, and the other end is connected to the two top plates. When the jacking wire is tightened, the lifting plate expands downward, the top plate expands upward, and drives the two side plates to expand to both sides to form a four-sided expansion-tight connection with the inner wall of the pipe. The pipe fastening connection fitting has the advantages of simple structure, easy installation, and effective protection of fasteners from damage.

Description

A pipe fastening connection fitting

technical field

The invention relates to an assembly technology for pipe connection, in particular to a pipe fastening connection fitting.

Background technique

In the prior art, there are many structures for connecting pipes through connecting fittings. The more common one is to insert the pipes into the connecting fittings, and then directly connect and fix the pipes and connecting fittings with fasteners such as screws and rivets, and use the above method to connect the pipes. , the installation steps are more complicated, and the stress at the connection is mainly concentrated on the fasteners, and the stress points of the fasteners are prone to shear force and fracture failure.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a pipe fastening connection fitting which is simple in structure, easy to install, and can effectively protect the fasteners from damage.

In order to solve the problems of the technologies described above, the technical solution proposed by the present invention is:

A pipe fastening connection fitting, including an expansion joint and a top wire for expanding the expansion joint, the expansion joint includes a connecting bottom plate, and a lifting plate is bent at the lower end of the connecting bottom plate, connecting both sides of the bottom plate There are two side plates bent, and the upper ends of the two side plates are provided with a top plate that is bent to connect to the upper part of the bottom plate. One end of the jacking wire is screwed to the lifting plate, and the other end is connected to the two top plates. When jacking up the wire, the lifting plate expands downward, the top plate expands upward, and drives the two side plates to expand to both sides to form a four-sided expansion tight connection with the inner wall of the pipe.

The included angle between the top plate and the side plate is α, 45°≤α≤90°.

Both of the two side plates are triangular in shape.

The width of the gap between the two top plates is smaller than the diameter of the end of the top wire.

The two top boards overlap each other.

The connecting bottom plate is provided with a through hole for passing through the fastener to connect the pipe.

The fittings for fastening and connecting the pipes also include a decorative sleeve sheathed outside the connection of the pipes, and the decorative sleeve is provided with an operation hole for inserting a tool to rotate the jacking wire.

Compared with the prior art, the present invention has the advantages of:

The pipe fastening connection fitting of the present invention has a simple structure, is easy to install, and can effectively protect the fastener from damage. Screw in the expansion joint, and connect one end of the top wire with the two top plates of the expansion joint, then insert another pipe outside the expansion joint, use a tool to pass through the opening of the pipe and continue to tighten the top Wire, so that the lifting plate expands downward, the two top plates expand upward, and drives the two side plates to expand to both sides to form a four-sided expansion connection with the inner wall of the pipe. When the two sections of pipe are subjected to destructive force, the connection The force borne by the fittings will not be concentrated on the top wire, but offset by the expansion force between the expansion joint and the inner wall of the pipe, thereby preventing the top wire from being broken by shear force and avoiding the failure of the connection between the two pipes.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the pipe fastening connection fitting of the present invention.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Fig. 3 is a front view of the expansion joint in Embodiment 1 of the pipe fastening connection fitting of the present invention.

Fig. 4 is a left side view of the expansion joint in Embodiment 1 of the pipe fastening connection fitting of the present invention.

Fig. 5 is a perspective view of the expansion joint in Embodiment 1 of the pipe fastening connection fitting of the present invention.

Fig. 6 is a schematic structural view of Embodiment 2 of the pipe fastening connection fitting of the present invention.

Fig. 7 is a B-B sectional view of Fig. 6 .

Fig. 8 is a front view of the expansion joint in Embodiment 2 of the pipe fastening connection fitting of the present invention.

Fig. 9 is a left view of the expansion joint in Embodiment 2 of the pipe fastening connection fitting of the present invention.

Fig. 10 is a perspective view of the expansion joint in Embodiment 2 of the pipe fastening connection fitting of the present invention.

Each label in the figure means:

1. Expansion joint; 2. Top wire; 3. Pipe material; 4. Decorative sleeve; 11. Connecting bottom plate; 12. Lifting plate; 13. Top plate; 14. Side plate; 41. Operation hole; 111. Through hole; 121, threaded hole. the

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments.

Example 1:

Figures 1 to 5 show the first embodiment of the pipe fastening connection fittings of the present invention, the connection fittings include an expansion joint 1 and a top wire 2 for expanding the expansion joint 1, the expansion joint 1 includes Connecting the base plate 11, the lower end of the connecting base plate 11 is bent with a jacking plate 12, two side plates 14 are bent on both sides of the connecting base plate 11, the upper ends of the two side plates 14 are provided with a top plate 13 bent to the upper part of the connecting base plate 11, One end of the jacking wire 2 is threadedly connected with the lifting plate 12, and the other end is connected with two top plates 13. When the jacking wire 2 is tightened, the jacking plate 12 expands downward, and the top plate 13 expands upward, and drives the two side plates 14 expands to both sides to form a four-sided expansion connection with the inner wall of the pipe 3, which has a simple structure, is easy to install, and can effectively protect the fasteners from damage. During assembly, the expansion joint 1 is fastened to the outer wall of a pipe 3 through fasteners, and then the top wire 2 is screwed into the expansion joint 1, and one end of the top wire 2 is connected to the two top plates of the expansion joint 1 13, and then insert another pipe 3 outside the expansion joint 1, use a tool to pass through the opening of the pipe 3 and continue to tighten the top wire 2, so that the lifting plate 12 expands downward, and the two top plates 13 expands upwards and drives the two side plates 14 to expand to both sides to form a four-sided expansion connection with the inner wall of the pipe 3. When the two sections of pipe 3 are subjected to destructive force, the force borne by the connecting fitting will not be concentrated on the top wire 2, but offset by the expansion force between the expansion joint 1 and the inner wall of the pipe 3, so as to prevent the top wire 2 from being broken by the shear force and avoid the connection failure of the two sections of pipe 3.

In this embodiment, the included angle between the top plate 13 and the side plate 14 on the expansion joint 1 is α, 45°≤α≤90°, and in this embodiment α=75°; the two side plates 14 are both triangular in shape; The gap width between two top boards 13 is less than the diameter of top wire 2 ends; The top plate 13 is evenly stressed, and the top plate 13 and the side plate 14 form an angle α. When the two top plates 13 expand upward, the two side plates 14 will receive the force from the top plate 13 and expand to both sides. In this way, the entire expansion joint 1 and the inner four walls of the pipe 3 achieve a good expansion effect. At the same time, the two triangular-shaped side plates 14 make the pipe fastening connection fittings of the present invention more stable, thereby improving the strength of the pipe connection .

In this embodiment, the connection bottom plate 11 is further provided with a through hole 111 for passing through the fastener to connect the pipe 3; 4 is provided with the operating hole 41 that is used to extend into the rotating jackscrew 2 of the tool, and the decorative cover 4 can play a role of beautifying the appearance and certain sealing.

Example 2:

Fig. 6 to Fig. 10 have shown the second embodiment of the pipe fastening connection fitting of the present invention, and this connection fitting is basically the same as embodiment 1, and the only difference is that: two top plates 13 overlap each other; when the end of the top wire 2 When the top plate 13 at the lower end is pressed against the top plate 13 to expand upwards, the other top plate 13 at the upper end will also expand upwards through force transmission, and the two side plates 14 will be driven to expand to both sides. The inner wall forms a four-sided expansion-tight connection.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (7)

1. a tubing is fastenedly connected accessory, it is characterized in that: comprise swelling joint (1) and for making the jackscrew (2) of swelling joint (1) distending, described swelling joint (1) comprises connecting bottom board (11), described connecting bottom board (11) lower end is bent with raising plate (12), connecting bottom board (11) both sides are bent with two blocks of side plates (14), two blocks of side plates (14) upper end is equipped with the top board (13) that is bent to connecting bottom board (11) top, described jackscrew (2) one end is threaded with raising plate (12), the other end and two top boards (13) join, while screwing described jackscrew (2), raising plate (12) is distending downwards, top board (13) is distending upwards, and drive two blocks of side plates (14) to be connected to both sides distending and described tubing (3) inwall formation four sides swelling.

2. tubing according to claim 1 is fastenedly connected accessory, it is characterized in that: described top board (13) is α with the angle of described side plate (14), 45 °≤α≤90 °.

3. tubing according to claim 1 and 2 is fastenedly connected accessory, it is characterized in that: described two blocks of side plates (14) are shape triangular in shape all.

4. tubing according to claim 1 and 2 is fastenedly connected accessory, it is characterized in that: the gap width between described two top boards (13) is less than the diameter of described jackscrew (2) end.

5. tubing according to claim 1 and 2 is fastenedly connected accessory, it is characterized in that: described two top boards (13) overlap mutually.

6. tubing according to claim 1 and 2 is fastenedly connected accessory, it is characterized in that: described connecting bottom board (11) is provided with the through hole (111) that connects tubing (3) for wearing fastening piece.

7. tubing according to claim 1 and 2 is fastenedly connected accessory, it is characterized in that: described tubing is fastenedly connected accessory and also comprises the sheathing (4) being sheathed on outside tubing (3) joint, offers the handle hole (41) that rotates described jackscrew (2) for stretching into instrument on described sheathing (4).