Metal joint for high-pressure flexible composite pipe

Abstract

The utility model relates to the technical field of high-pressure flexible composite pipe joints, in particular to a metal joint for a high-pressure flexible composite pipe. The metal joint for the high-pressure flexible composite pipe comprises an external locking pipe fitting, locking sliding blocks are evenly arranged on the inner side wall of the external locking pipe fitting, and the left side area of each locking sliding block is larger than the right side area of each locking sliding block. The metal joint is sealed by the internal locking pipe fitting and a plurality of groups of inner side O-shaped rings, so that the metal joint can be tightly attached to the fiber-reinforced flexible composite pipe under continuous high pressure, and the connection stability under the continuous high pressure is further ensured; when the conical metal locking sliding block is fastened to the outer wall of the fiber-reinforced flexible composite pipe, it can be guaranteed that enough locking force is provided for fastening the connecting flange of the metal connector to the outer wall of the pipe, so that the pipe has great tensile strength after being connected through the connector, and meanwhile the situation that the metal connector and the outer wall of the pipe are loosened is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure flexible composite pipe joints, in particular to a metal joint used for a high-pressure flexible composite pipe. Background Art

[0002] The common metal joints for high-pressure flexible composite pipes on the market require a small distance to be reserved at the end of the flexible composite pipe for locking the locking slider when the external locking fittings and the internal locking fittings are connected during installation. The reserved distance needs to be adjusted according to the actual outer diameter of the high-pressure flexible composite pipe. In addition, due to different working conditions during actual installation, the metal joints have higher requirements for the installation workers when connecting the pipelines, and it is necessary to ensure that the connection surfaces are fitted without gaps. In view of the above situation, technical innovation is carried out on the basis of the existing metal joints for high-pressure flexible composite pipes. Utility Model Content

[0003] The purpose of the utility model is to provide a metal joint for a high-pressure flexible composite pipe to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: a metal joint for a high-pressure flexible composite pipe, comprising:

[0005] An external locking pipe fitting, the inner wall of the external locking pipe fitting is evenly provided with locking sliders, the left area of ​​the locking slider is larger than the right area, an internal locking pipe fitting is placed in the external locking pipe fitting, the outer wall of the internal locking pipe fitting is evenly provided with annular grooves, and an inner O-ring is placed in the annular groove.

[0006] Preferably, the outer ring of the internal locking pipe is sleeved with a fiber-reinforced flexible composite pipe, and the outer wall of the inner O-ring fits with the inner wall of the fiber-reinforced flexible composite pipe.

[0007] Preferably, the locking sliders are evenly located on the outer ring of the fiber-reinforced flexible composite tube, and the inner side wall of the locking slider is in contact with the outer side wall of the fiber-reinforced flexible composite tube.

[0008] Preferably, a second flange and a first flange are provided on the left side of the outer side wall of the internal locking pipe, and the first flange is located on the right side of the second flange.

[0009] Preferably, a fourth flange is provided on the left side of the external locking pipe fitting, and a third flange is provided on the left side of the external locking pipe fitting.

[0010] Preferably, the right side of the first flange fits with the left side of the fourth flange, bolts are inserted into the docking holes of the first flange and the fourth flange, nuts are screwed on the outer side walls of the bolts, and the nuts are located on the right side of the fourth flange.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The metal joint can ensure that the metal joint and the fiber-reinforced flexible composite pipe are tightly fitted under continuous high pressure through the internal locking pipe fittings and the sealing of multiple sets of inner O-rings, thereby ensuring the connection stability under continuous high pressure;

[0013] When the conical metal locking slider is fastened to the outer wall of the fiber-reinforced flexible composite pipe, it can ensure sufficient locking force to fasten the connection flange of the metal joint to the outer wall of the pipe, so that the pipe has great tensile strength after being connected through the joint, and it is not easy for the metal joint and the outer wall of the pipe to loosen;

[0014] When connecting pipes, metal joints only need to be connected by tightening bolts, which effectively improves the installation efficiency of metal joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front cross-sectional view of a metal joint for a high-pressure flexible composite pipe according to the utility model;

[0016] Figure 2 For this utility model Figure 1 Enlarged view of part A.

[0017] In the figure: 1. fiber reinforced flexible composite pipe; 2. external locking pipe fitting; 3. internal locking pipe fitting; 4. locking slider; 5. inner O-ring; 6. bolt; 61. nut; 7. first flange; 71. second flange; 72. third flange; 73. fourth flange. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 2, a metal joint for a high-pressure flexible composite pipe, comprising an external locking pipe fitting 2, a locking slider 4 is inserted into the inner wall of the external locking pipe fitting 2, the left area of ​​the locking slider 4 is larger than the right area, an internal locking pipe fitting 3 is placed in the external locking pipe fitting 2, an annular groove is evenly opened on the outer wall of the internal locking pipe fitting 3, an inner O-ring 5 is placed in the annular groove, a fiber-reinforced flexible composite pipe 1 is sleeved on the outer ring of the internal locking pipe fitting 3, the outer wall of the inner O-ring 5 is fitted with the inner wall of the fiber-reinforced flexible composite pipe 1, the locking slider 4 is evenly located on the outer ring of the fiber-reinforced flexible composite pipe 1, the inner wall of the locking slider 4 is fitted with the outer wall of the fiber-reinforced flexible composite pipe 1, and the connection gap between the fiber-reinforced flexible composite pipe 1 and the internal locking pipe fitting 3 can be sealed by the inner O-ring 5;

[0020] A second flange 71 and a first flange 7 are fixedly provided on the left side of the outer wall of the internal locking pipe fitting 3, and the first flange 7 is located on the right side of the second flange 71. A fourth flange 73 is fixedly provided on the left side of the external locking pipe fitting 2, and a third flange 72 is fixedly provided on the left side of the external locking pipe fitting 2. The right side of the first flange 7 fits with the left side of the fourth flange 73. Bolts 6 are inserted into the docking holes of the first flange 7 and the fourth flange 73, and nuts 61 are screwed on the outer wall of the bolts 6. The nuts 61 are located on the right side of the fourth flange 73. The first flange 7 and the fourth flange 73 can be docked and fixed by the bolts 6 and the nuts 61, thereby completing the docking and fixing of the internal locking pipe fitting 3 and the external locking pipe fitting 2.

[0021] Working principle: insert the fiber reinforced flexible composite pipe 1 from the right side of the external locking pipe fitting 2, evenly insert the locking slider 4 into the gap between the fiber reinforced flexible composite pipe 1 and the external locking pipe fitting 2, and then install the inner O-ring 5 in the annular groove of the internal locking pipe fitting 3, and then insert the internal locking pipe fitting 3 from the left side of the fiber reinforced flexible composite pipe 1, and seal the connection gap between the fiber reinforced flexible composite pipe 1 and the internal locking pipe fitting 3 through the inner O-ring 5, insert the bolt 6 into the first flange 7 and the fourth flange 73, and screw it with the nut 61, after tightening the nut 61, the external locking pipe fitting 2 and the internal locking pipe fitting 3 are connected and tightened by the bolt 6 and the nut 61, at this time, the locking slider 4 is subjected to the pre-tightening force from the outside of the external locking pipe fitting 2, and will squeeze the fiber reinforced flexible composite pipe 1 inward, so that the fiber reinforced flexible composite pipe 1 and the internal locking pipe fitting 3 are tightly fitted, thereby ensuring the pipeline connection stability of the fiber reinforced flexible composite pipe 1 under high pressure.

Claims

1. A metal joint for a high-pressure flexible composite pipe, characterized in that: include: An external locking pipe fitting (2), wherein locking sliders (4) are evenly arranged on the inner side wall of the external locking pipe fitting (2), the left side area of ​​the locking slider (4) is larger than the right side area, an internal locking pipe fitting (3) is arranged inside the external locking pipe fitting (2), annular grooves are evenly arranged on the outer side wall of the internal locking pipe fitting (3), and an inner O-ring (5) is arranged in the annular groove.

2. A metal joint for a high-pressure flexible composite pipe according to claim 1, characterized in that: The outer ring of the internal locking pipe (3) is sleeved with a fiber-reinforced flexible composite pipe (1), and the outer wall of the inner O-ring (5) is in contact with the inner wall of the fiber-reinforced flexible composite pipe (1).

3. A metal joint for a high-pressure flexible composite pipe according to claim 2, characterized in that: The locking sliders (4) are evenly located on the outer ring of the fiber-reinforced flexible composite pipe (1), and the inner side wall of the locking slider (4) fits with the outer side wall of the fiber-reinforced flexible composite pipe (1).

4. A metal joint for a high-pressure flexible composite pipe according to claim 2, characterized in that: A second flange (71) and a first flange (7) are arranged on the left side of the outer side wall of the internal locking pipe (3), and the first flange (7) is located on the right side of the second flange (71).

5. A metal joint for a high-pressure flexible composite pipe according to claim 4, characterized in that: A fourth flange (73) is arranged on the left side of the external locking pipe (2), and a third flange (72) is arranged on the left side of the external locking pipe (2).

6. A metal joint for a high-pressure flexible composite pipe according to claim 5, characterized in that: The right side of the first flange (7) is fitted with the left side of the fourth flange (73); a bolt (6) is inserted into the docking holes of the first flange (7) and the fourth flange (73); a nut (61) is screwed onto the outer wall of the bolt (6); and the nut (61) is located on the right side of the fourth flange (73).

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