Leakage-proof device for connection of steel-plastic composite pipes

Abstract

The utility model relates to the technical field of steel-plastic composite pipe connection, and discloses a steel-plastic composite pipe connection leakage-proof device which comprises a first steel-plastic composite pipe and a second steel-plastic composite pipe, and the connecting end of the first steel-plastic composite pipe and the connecting end of the second steel-plastic composite pipe are fixedly connected with a first flange and a second flange respectively. A plurality of first limiting strips extending out of the first flange are installed on the outer side wall of the first flange in a circumferential equidistant array mode, and a plurality of second limiting strips extending out of the second flange are installed on the outer side wall of the second flange in a circumferential equidistant array mode. A plurality of first limiting strips and a plurality of second limiting strips which are staggered with each other are installed outside flanges which are in butt joint with each other of the steel-plastic composite pipe connecting leakage-proof device in a circumferential equidistant array mode, and flexible round strips are bonded to the inner side walls of the extending ends of the first limiting strips and the inner side walls of the extending ends of the second limiting strips in a matched mode. And the to-be-connected steel-plastic composite pipe can be quickly and preliminarily clamped and limited.

Description

Technical Field

[0001] The utility model relates to the technical field of steel-plastic composite pipe connection, in particular to a steel-plastic composite pipe connection anti-leakage device. Background Art

[0002] Steel-plastic composite pipe, also known as plastic-coated pipe or plastic-coated composite steel pipe, is a steel-plastic composite pipe with a steel pipe as the base. A plastic anti-corrosion layer is welded to the inner surface of the steel pipe (bottom pipe) or to the inner and outer surfaces through spraying, rolling, dipping, and suction processes. Plastic-coated steel pipe has excellent corrosion resistance and relatively low friction resistance. Epoxy resin-coated steel pipe is suitable for conveying media such as water supply and drainage, seawater, warm water, oil, and gas. Polyvinyl chloride-coated steel pipe is suitable for conveying media such as drainage, seawater, oil, and gas. Steel-plastic composite pipes are generally connected to each other through flanges, bolts, gaskets, and nuts. The flange connection surface is sealed with a sealing ring embedded in it to prevent leakage, achieving excellent leak-proofing effect.

[0003] Before connecting the existing steel-plastic composite pipe, the flanges at the double-end pipe connection ends need to be aligned and tightened by hand, and the bolts are passed through the round holes on the flange surface with the other hand to fix them. During this process, the double-end pipes are easily displaced and skewed, resulting in misalignment of the round holes and difficulty in connection. Without a quick limit assembly, quick and accurate installation is impossible. Utility Model Content

[0004] The purpose of the present utility model is to provide a steel-plastic composite pipe connection and leakage prevention device. The utility model discloses a steel-plastic composite pipe connection and leakage prevention device, in which the outer sides of the mutually docking flanges are respectively installed with a plurality of mutually staggered first limit bars and second limit bars in a circumferentially equidistant array, and the inner side walls of the protruding ends of the first limit bars and the second limit bars are bonded with flexible round bars, which can quickly clamp and limit the steel-plastic composite pipes to be connected, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel-plastic composite pipe connection and leakage prevention device, comprising a first steel-plastic composite pipe and a second steel-plastic composite pipe, wherein the connecting ends of the first steel-plastic composite pipe and the second steel-plastic composite pipe are fixedly connected with a first flange and a second flange respectively, and the outer wall of the first flange is provided with a plurality of first limit bars extending from the first flange in a circumferentially equidistant array, and the outer wall of the second flange is provided with a plurality of second limit bars extending from the second flange in a circumferentially equidistant array, when the circular holes of the first flange and the second flange are aligned, the first limit bars and the second limit bars are staggered, and the inner walls of the protruding ends of the first limit bars and the second limit bars are both bonded with flexible round bars.

[0006] Preferably, sealing rings are embedded in the connecting surfaces of the first flange and the second flange.

[0007] Preferably, the sealing ring is made of rubber.

[0008] Preferably, the flexible round strip is made of rubber.

[0009] Preferably, the surfaces of the first flange and the second flange are provided with a plurality of circular holes in a circumferentially equidistant array and are connected to each other by bolts, nuts and gaskets.

[0010] Preferably, the lengths of the first limiting strip and the second limiting strip are both longer than the thickness of the first flange and the second flange after being connected, and the protruding ends are sufficient to bond the flexible round strip.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model discloses a steel-plastic composite pipe connection and leakage prevention device, the outer sides of the mutually docking flanges are respectively installed with a plurality of mutually staggered first limit bars and second limit bars in a circumferentially equidistant array, and the inner side walls of the protruding ends of the first limit bars and the second limit bars are bonded with flexible round bars, which can quickly clamp and limit the steel-plastic composite pipes to be connected, and solve the problem that the existing steel-plastic composite pipes need to align the flanges of the double-end pipe connection ends and pinch them with hands before connection, and use the other hand to fix bolts through the circular holes on the flange surfaces, in which the double-end pipes are easily shifted and skewed during the process, resulting in misalignment of the circular holes and difficulty in connection, and there is no quick limit component to cooperate, so that fast and accurate installation cannot be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0016] In the figure: 1. First steel-plastic composite pipe; 2. First flange; 3. Second steel-plastic composite pipe; 4. Second flange; 5. Bolt; 6. Nut; 7. Gasket; 8. Round hole; 9. First limit strip; 10. Second limit strip; 11. Flexible round strip; 12. Sealing ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 3The figure shows a steel-plastic composite pipe connection and leakage prevention device, comprising a first steel-plastic composite pipe 1 and a second steel-plastic composite pipe 3. The connecting ends of the first steel-plastic composite pipe 1 and the second steel-plastic composite pipe 3 are respectively fixedly connected with a first flange 2 and a second flange 4. The outer wall of the first flange 2 is provided with a plurality of first limiting strips 9 extending from the first flange 2 in a circumferentially equidistant array, and the outer wall of the second flange 4 is provided with a plurality of second limiting strips 10 extending from the second flange 4 in a circumferentially equidistant array. When the circular holes 8 of the first flange 2 and the second flange 4 are aligned, the first limiting strips 9 and the second limiting strips 10 are staggered. The inner side walls of the protruding ends of the first limiting strips 9 and the second limiting strips 10 are both bonded with flexible round strips 11. The steel-plastic composite pipe connection and leakage prevention device disclosed in the utility model has the outer sides of the mutually docking flanges being provided with a plurality of mutually staggered first limiting strips 9 and second limiting strips 10 in a circumferentially equidistant array. The inner side walls of the protruding ends of the first limiting strips 9 and the second limiting strips 10 are bonded with flexible round strips 11, so that the steel-plastic composite pipes to be connected can be quickly preliminarily clamped and limited.

[0019] Furthermore, the connecting surfaces of the first flange 2 and the second flange 4 are both embedded with a sealing ring 12, which has good sealing effect and good leak-proof effect; further, the sealing ring 12 is made of rubber material, which is soft and elastic, can rebound quickly under pressure at room temperature, and has good sealing effect; further, the flexible round bar 11 is made of rubber material, which is convenient for quick connection; further, the surfaces of the first flange 2 and the second flange 4 are provided with a plurality of circular holes 8 in a circumferentially equidistant array and are connected to each other by bolts 5, nuts 6 and gaskets 7, which is convenient for connection; further, the length of the first limit bar 9 and the second limit bar 10 are both longer than the thickness of the first flange 2 and the second flange 4 after connection, and the protruding part at the end is sufficient to bond the flexible round bar 11, which is convenient for limiting and can be quickly connected.

[0020] In this solution, when in use, the flanges of the steel-plastic composite pipe connection and leak-proof device disclosed by the present invention are connected to each other in a circular equidistant array and are respectively installed with a number of mutually staggered first limiting strips 9 and second limiting strips 10, and the inner side walls of the protruding ends of the first limiting strips 9 and the second limiting strips 10 are bonded with flexible round strips 11, which can quickly clamp and limit the steel-plastic composite pipes to be connected, align the first flange 2 at the end of the first steel-plastic composite pipe 1 with the second flange 4 at the end of the second steel-plastic composite pipe 3, and align the circular holes 8 with each other. At this time, the first flange 2 and the second flange 4 are meshed with each other. Since the circular holes 8 of the first flange 2 and the second flange 4 are aligned, the first limiting strip 9 outside the first flange 2 and the second limiting strip 4 outside the second flange 4 are in a state of alignment. The limiting strips 10 are arranged in an alternating manner, the first flange 2 squeezes through the flexible round strip 11 at the end of the inner wall of the second limiting strip 10, and the second flange 4 squeezes through the flexible round strip 11 at the end of the inner wall of the first limiting strip 9. The flexible round strips 11 at the end of the inner wall of the first limiting strip 9 and the second limiting strip 10 limit the first flange 2 and the second flange 4, so that the first flange 2 and the second flange 4 are initially fitted together, and will not loosen even if not pinched by hand. The first limiting strip 9 and the second limiting strip 10 surround the outside of the first flange 2 and the second flange 4 to prevent the first flange 2 and the second flange 4 from being misaligned, so that they are always limited and aligned, and your hands can be freed from the need to pinch and limit. At this time, the first flange 2 and the second flange 4 can be easily connected together with bolts 5, nuts 6 and gaskets 7.

[0021] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel-plastic composite pipe connection and leakage prevention device, comprising a first steel-plastic composite pipe (1) and a second steel-plastic composite pipe (3), characterized in that: The connecting ends of the first steel-plastic composite pipe (1) and the second steel-plastic composite pipe (3) are respectively fixedly connected to the first flange (2) and the second flange (4); the outer wall of the first flange (2) is provided with a plurality of first limiting strips (9) extending from the first flange (2) in a circumferentially equidistant array; the outer wall of the second flange (4) is provided with a plurality of second limiting strips (10) extending from the second flange (4) in a circumferentially equidistant array; when the circular holes (8) of the first flange (2) and the second flange (4) are aligned, the first limiting strips (9) and the second limiting strips (10) are staggered; and the inner walls of the protruding ends of the first limiting strips (9) and the second limiting strips (10) are both bonded with flexible round strips (11).

2. The steel-plastic composite pipe connection anti-leakage device according to claim 1, characterized in that: The connecting surfaces of the first flange (2) and the second flange (4) are both embedded with sealing rings (12).

3. The steel-plastic composite pipe connection anti-leakage device according to claim 2, characterized in that: The sealing ring (12) is made of rubber material.

4. The steel-plastic composite pipe connection and leak-proof device according to claim 1, characterized in that: The flexible round strip (11) is made of rubber material.

5. The steel-plastic composite pipe connection anti-leakage device according to claim 1, characterized in that: The surfaces of the first flange (2) and the second flange (4) are provided with a plurality of circular holes (8) in a circumferentially equidistant array and are connected to each other via bolts (5), nuts (6) and gaskets (7).

6. The steel-plastic composite pipe connection anti-leakage device according to claim 1, characterized in that: The lengths of the first limiting strip (9) and the second limiting strip (10) are both longer than the thickness of the first flange (2) and the second flange (4) after being connected, and the protruding ends are sufficient to bond the flexible round strip (11).

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