Connecting structure of stainless steel pipe and connector

Abstract

The utility model discloses a connecting structure of a stainless steel pipe and a connector, which belongs to the technical field of pipeline connectors, and is characterized by comprising the stainless steel pipe and the connector, the end part of the connector is inserted into the stainless steel pipe, the end part of the stainless steel pipe shrinks inwards to form a bending part, and the inner side wall of the bending part abuts against the outer side wall of the connector. According to the connecting structure, the end of the stainless steel pipe is necked inwards to form the bent part only by means of a tool, connection between the stainless steel pipe and the connector can be completed, production and machining are simpler, and connection is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline joints, and particularly relates to a connection structure of a stainless steel pipe and a joint. Background Art

[0002] A Chinese patent with announcement number CN109237159B discloses a stainless steel pipe joint, including a joint body and a stainless steel pipe; the joint body is a split symmetrical structure, and the joint body includes a first joint and a second joint; the first joint and the second joint are both provided with internal threads on the inner walls and the thread diameter of the first joint is larger than the thread diameter of the second joint; two different internal threads are provided to be suitable for different stainless steel pipes; a groove is provided at one end of the first joint; a waterproof rubber membrane is provided in the groove, and a socket is provided on the waterproof rubber membrane; a plug column matching the socket is fixedly connected to one end of the second joint, and a wedge-shaped fixing block is fixedly connected to one end of the second joint; the plug column is fixedly connected to the wedge-shaped fixing block.

[0003] The above technical solution has the following defects: the stainless steel pipe is threadedly connected to the joint body by screwing, so it is necessary to open threads on the stainless steel pipe, but since the stainless steel material has high hardness and strength, the cutting force during the cutting process is large, and since the thermal conductivity of stainless steel is poor, the heat generated during the cutting process is not easy to dissipate, which easily causes tool wear and cutting difficulty. It is difficult to open threads on the stainless steel pipe. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the prior art and to propose a connection structure between a stainless steel pipe and a joint. The technical problem to be solved by the utility model is: how to easily achieve the connection between the joint and the stainless steel pipe.

[0005] The above technical purpose of the utility model can be achieved through the following technical solutions: a connection structure of a stainless steel pipe and a joint, comprising a stainless steel pipe and a joint, characterized in that: the end of the joint is inserted into the stainless steel pipe, the end of the stainless steel pipe is contracted inward to form a bending portion, the inner side wall of the bending portion is pressed against the outer side wall of the joint, the outer side wall of the joint is provided with an annular groove, and the bending portion is pressed into the annular groove.

[0006] In the above-mentioned connection structure between a stainless steel pipe and a joint, an outer side wall of the joint is provided with an annular flange, and the end of the bent portion abuts against the upper end surface of the annular flange.

[0007] In the above-mentioned connection structure between a stainless steel pipe and a joint, an outer side wall of the bending portion is formed with an arc surface.

[0008] In the above-mentioned connection structure of a stainless steel pipe and a joint, the curvature range of the arc surface 1 is 45 degrees to 65 degrees.

[0009] In the above-mentioned connection structure between a stainless steel pipe and a joint, the inner side wall of the bent portion is formed with a second arc surface.

[0010] In the above-mentioned connection structure between a stainless steel pipe and a joint, the outer side wall of the joint is provided with a third arc surface, and the second arc surface is in contact with the third arc surface.

[0011] In the above-mentioned connection structure of a stainless steel pipe and a joint, the arc range of the arc surface three is 35 degrees to 55 degrees.

[0012] In the above-mentioned connection structure between a stainless steel pipe and a joint, the end of the stainless steel pipe is rolled inward to form the bending portion.

[0013] In the above-mentioned connection structure between a stainless steel pipe and a joint, at least one sealing ring is provided between the joint and the stainless steel pipe.

[0014] In the above-mentioned connection structure between a stainless steel pipe and a joint, an outer side wall of the joint is provided with a receiving groove corresponding to the sealing ring, and the sealing ring is arranged in the receiving groove.

[0015] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0016] When connecting the stainless steel pipe and the joint, the joint is inserted into the stainless steel pipe, and then the end of the stainless steel pipe is contracted inwardly with the help of a tool to form a bending portion. The inner wall of the bending portion is pressed against the outer wall of the joint, and the bending portion and the joint are tightly matched to achieve the connection between the stainless steel pipe and the joint, and the sealing between the two can be effectively guaranteed. By opening an annular groove on the outer wall of the joint, the bending portion is pressed into the annular groove, and the matching of the bending portion and the annular groove can further strengthen the connection strength between the stainless steel pipe and the joint, making the connection between the stainless steel pipe and the joint more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of an embodiment;

[0018] Figure 2 Schematic diagram of the external structure of the embodiment.

[0019] Figure numerals: 1, stainless steel pipe; 2, joint; 3, bending portion; 4, annular groove; 5, annular flange; 6, arc surface one; 7, arc surface two; 8, arc surface three; 9, sealing ring; 10, receiving groove. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] A connection structure of a stainless steel pipe and a joint, such as Figure 1 to Figure 2 As shown, it includes a stainless steel pipe 1 and a joint 2, and the end of the joint 2 is inserted into the stainless steel pipe 1.

[0022] The end of the stainless steel tube 1 is contracted inwardly to form a bending portion 3. In this embodiment, the end of the stainless steel tube 1 is contracted inwardly by rolling to form the bending portion 3.

[0023] The inner wall of the bent portion 3 is pressed against the outer wall of the joint 2, and the connection between the stainless steel pipe 1 and the joint 2 is achieved through the tight cooperation between the bent portion 3 and the joint 2, and the sealing between the two can be effectively guaranteed.

[0024] An annular groove 4 is provided on the outer wall of the joint 2, and the bent portion 3 is pressed into the annular groove 4. The annular groove 4 restricts the bent portion 3, and the cooperation between the bent portion 3 and the annular groove 4 can further strengthen the connection strength between the stainless steel pipe 1 and the joint 2, making the connection between the stainless steel pipe 1 and the joint 2 more stable.

[0025] It should be noted that the connection between the stainless steel pipe 1 and the joint 2 can be achieved by rolling the end of the stainless steel pipe 1 inward to form a bending portion 3. Compared with the prior art in which the stainless steel pipe 1 and the joint 2 are connected by threading, this connection method is simpler to produce and process and more convenient to connect.

[0026] An annular flange 5 is provided on the outer wall of the joint 2, and the joint 2 and the annular flange 5 are integrally arranged. The annular flange 5 can effectively improve the structural strength of the joint 2. The end of the bent portion 3 contacts the upper end surface of the annular flange 5, thereby stably supporting the stainless steel pipe 1 and improving the stability of the overall structure.

[0027] At least one sealing ring 9 is arranged between the joint 2 and the stainless steel pipe 1. The outer wall of the joint 2 is provided with a receiving groove 10 corresponding to the sealing ring 9. The sealing ring 9 is arranged in the receiving groove 10. In the present embodiment, there are two sealing rings 9 and two corresponding receiving grooves 10. The two receiving grooves 10 are arranged on the outer wall of the joint 2 along the length direction of the joint 2. The sealing ring 9 is used to seal the joint 2 and the stainless steel pipe 1, thereby improving the sealing between the two. The sealing ring 9 is arranged in the receiving groove 10 to ensure the stability of the sealing ring 9.

[0028] The outer wall of the bending portion 3 is formed with an arc surface 6, and the arc range of the arc surface 6 is 45 degrees-65 degrees. Preferably, in this embodiment, the arc range of the arc surface 6 is 55 degrees. In other embodiments, the arc range of the arc surface 6 can also be 50 degrees or 60 degrees.

[0029] The inner wall of the bending portion 3 is formed with an arc surface 2 7, and the outer wall of the joint 2 is provided with an arc surface 3 8. The arc surface 2 7 is fitted with the arc surface 3 8. By fitting the arc surface 2 7 with the arc surface 3 8, the bending portion 3 and the joint 2 are more closely matched, thereby improving the stability of the connection between the stainless steel pipe 1 and the joint 2.

[0030] The curvature range of arc surface three 8 is 35 degrees-55 degrees. Preferably, in this embodiment, the curvature of arc surface one 6 is 45 degrees. In other embodiments, the curvature of arc surface one 6 can also be 40 degrees or 50 degrees. It should be noted that since arc surface three 8 needs to fit with arc surface two 7, and the curvature of arc surface two 7 will be affected by the thickness of stainless steel tube 1, the curvature of arc surface three 8 can be adaptively adjusted according to actual conditions.

[0031] The operation method of connecting the stainless steel pipe and the joint is as follows:

[0032] First, install the sealing ring 9 into the receiving groove 10, then insert the joint 2 into the stainless steel pipe 1, and then use a tool to roll the end of the stainless steel pipe 1 inward to form a bending portion 3, thereby completing the connection between the stainless steel pipe 1 and the joint 2.

[0033] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A connection structure of a stainless steel pipe and a joint, comprising a stainless steel pipe (1) and a joint (2), characterized in that: The end of the joint (2) is inserted into the stainless steel pipe (1), and the end of the stainless steel pipe (1) is contracted inward to form a bent portion (3), the inner side wall of the bent portion (3) is pressed against the outer side wall of the joint (2), and the outer side wall of the joint (2) is provided with an annular groove (4), and the bent portion (3) is pressed into the annular groove (4).

2. The connection structure of a stainless steel pipe and a joint according to claim 1, characterized in that: The outer side wall of the joint (2) is provided with an annular flange (5), and the end of the bent portion (3) abuts against the upper end surface of the annular flange (5).

3. The connection structure of a stainless steel pipe and a joint according to claim 1, characterized in that: The outer side wall of the bending portion (3) is formed with a curved surface (6).

4. The connection structure of a stainless steel pipe and a joint according to claim 3, characterized in that: The arc angle of the arc surface 1 (6) is between 45 degrees and 65 degrees.

5. The connection structure of a stainless steel pipe and a joint according to claim 1, characterized in that: The inner side wall of the bending portion (3) is formed with a second arc surface (7).

6. The connection structure of a stainless steel pipe and a joint according to claim 5, characterized in that: The outer side wall of the joint (2) is provided with a third arc surface (8), and the second arc surface (7) is in contact with the third arc surface (8).

7. The connection structure of a stainless steel pipe and a joint according to claim 6, characterized in that: The arc angle range of the arc surface three (8) is 35 degrees to 55 degrees.

8. The connection structure of a stainless steel pipe and a joint according to claim 1, characterized in that: The end of the stainless steel tube (1) is rolled inwardly to form the bent portion (3).

9. The connection structure of a stainless steel pipe and a joint according to claim 1, characterized in that: At least one sealing ring (9) is provided between the joint (2) and the stainless steel pipe (1).

10. The connection structure of a stainless steel pipe and a joint according to claim 9, characterized in that: The outer side wall of the joint (2) is provided with a receiving groove (10) corresponding to the sealing ring (9), and the sealing ring (9) is arranged in the receiving groove (10).

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