Fixed-length plastic-coated composite steel pipe

Abstract

The utility model belongs to the technical field of plastic-coated composite steel pipes, and discloses a fixed-length plastic-coated composite steel pipe which comprises a pipe body, a plurality of first limiting blocks are fixedly connected to the edge of one side of the outer end of the pipe body, the first limiting blocks are annularly arranged at equal intervals with the pipe body as the axis, and a sleeve is fixedly connected to the side, away from the first limiting blocks, of the outer end of the pipe body. The inner wall of the sleeve is fixedly connected with a plurality of second limiting blocks matched with the first limiting blocks, and the ends, close to each other, of the first limiting blocks and the second limiting blocks are arranged to be of inclined structures in the opposite directions. Meanwhile, under the mutual extrusion action of the inclined surfaces of the first limiting block and the second limiting block, the connecting ends of the two sections of steel pipes are forced to be tightly connected in an abutting mode, so that the sealing performance of the connecting ends of the steel pipes is guaranteed while the steel pipes are rapidly assembled and disassembled, and the working efficiency is effectively improved; and the pipeline mounting quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plastic coated composite steel pipe technical field especially relates to a fixed size plastic coated composite steel pipe. BACKGROUND

[0002] Fixed size plastic coated composite steel pipe is a kind of pipe material with anticorrosion performance, usually used in the pipeline system for conveying liquid, gas or other substances. The characteristics of this steel pipe are that a layer of special plastic (such as polyethylene) or epoxy resin material is coated on the surface of the steel pipe to enhance its corrosion resistance and service life.

[0003] Through the search of Chinese utility model patent (publication number CN218378232U) discloses a kind of plastic coated composite steel pipe with quick connecting structure, by inserting arc block into connecting groove, and rotate arc block makes it adhere to arc strip, so that two steel pipes are initially connected, by the upper surface of insertion strip aligning mounting hole, because insertion strip has certain elasticity, so that insertion strip enters the inner wall of mounting hole, completes clamping, further fixed connection to two steel pipes is completed, solves the problem of complicated installation process and slow installation efficiency, there is waste of human resources.

[0004] But through practical application finds that the technical scheme still at least has following defects:

[0005] The existing plastic coated composite steel pipe is mostly used for transporting gas or liquid, so its sealing performance is crucial, and the common plastic coated composite steel pipe is connected by flange, the tighter the bolt is screwed, the tighter the abutment between the two steel pipes is, which is beneficial to the sealing of the pipeline. Although the connection of the two steel pipes is realized by the clamping of multiple insertion strips in this scheme, the contact surface of the two steel pipes does not exist the mutual extrusion force, which cannot guarantee the sealing performance, and affects the normal use of the pipeline. UTILITY MODEL CONTENTS

[0006] The utility model intends to provide a kind of fixed size plastic coated composite steel pipe to solve the problems raised in the above background technology, the first limit block and the second limit block matched are arranged at the two ends of steel pipe in this scheme, so that the two ends of steel pipe can be quickly fixed by rotating, and under the mutual extrusion of the inclined surfaces of the first limit block and the second limit block, the connecting end of the two steel pipes is forced to abut tightly, so that the sealing performance of the connecting end of the steel pipe is guaranteed while realizing the quick installation and removal of the steel pipe, the work efficiency is effectively improved, and the pipeline installation quality is guaranteed.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a fixed length plastic coating composite steel pipe, including the pipe body, the edge position fixed connection of pipe body outer end one side has a plurality of first limit piece, a plurality of first limit piece is equidistant arrangement with the pipe body as the axis ring, the fixed connection of sleeve of pipe body outer end side away from first limit piece, the inner wall fixed connection of sleeve has a plurality of second limit piece with first limit piece cooperation, the end of first limit piece and second limit piece is set as the opposite direction inclined structure.

[0009] Preferably, the pipe body is provided with a sealing ring at both ends, and a pair of sealing rings are arranged on the inner sides of the plurality of first limit pieces and the plurality of second limit pieces.

[0010] Preferably, the side of the plurality of second limit pieces with smaller thickness is provided with a positioning block, the positioning block is in abutment with the second limit piece, and the thickness of the positioning block is greater than the thickness of the end of the second limit piece in abutment with the positioning block.

[0011] Preferably, the outer end of the sleeve is provided with a plurality of rectangular holes, and the end of the plurality of positioning blocks close to each other is integrally formed with a rectangular block matched with the rectangular hole.

[0012] Preferably, a threaded hole is formed in the rectangular block, a bolt is screwed into the threaded hole, the head of the bolt is larger than the size of the rectangular hole, and the head of the bolt is in abutment with the outer end of the rectangular hole.

[0013] Compared with the prior art, the technical scheme has the beneficial effects that:

[0014] The first limit piece and the second limit piece matched with each other are arranged at both ends of the steel pipe, so that the two ends of the steel pipe can be quickly fixed by rotating, and under the mutual extrusion of the inclined surfaces of the first limit piece and the second limit piece, the connecting ends of the two steel pipes are forced to be in close abutment, so that the quick installation and disassembly of the steel pipe are realized, the sealing property of the connecting ends of the steel pipe is guaranteed, the work efficiency is effectively improved, and the pipeline installation quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The overall structure schematic view provided by the utility model is shown in the figure;

[0016] Fig. 2 The internal structure schematic view of the sleeve provided by the utility model is shown in the figure;

[0017] Fig. 3 The partial explosion structure schematic view of the sleeve provided by the utility model is shown in the figure.

[0018] Label: 1, pipe body; 2, first limit block; 3, sleeve; 4, second limit block; 5, sealing ring; 6, positioning block; 7, rectangular block; 8, rectangular hole; 9, bolt. DETAILED DESCRIPTION

[0019] The utility model will be further explained in detail in combination with the drawings and embodiments:

[0020] As Figs. 1-3 A fixed size plastic coated composite steel pipe shown in the figure, including pipe body 1, the edge position of one side of pipe body 1 outer end is fixedly connected with a plurality of first limit blocks 2, a plurality of first limit blocks 2 are equidistantly arranged in ring shape with pipe body 1 as the axis, the side of pipe body 1 outer end away from first limit block 2 is fixedly connected with sleeve 3, the inner wall of sleeve 3 is fixedly connected with a plurality of second limit blocks 4 matched with first limit block 2, the end of first limit block 2 and second limit block 4 close to each other is provided as the inclined structure in opposite directions, both ends of pipe body 1 are installed with sealing ring 5, a pair of sealing rings 5 are respectively arranged on the inner side of a plurality of first limit blocks 2 and a plurality of second limit blocks 4.

[0021] Fixed size plastic coated composite steel pipe is a kind of pipe material with corrosion resistance, it is usually used in pipeline system for conveying liquid, gas or other substances, the characteristics of this kind of steel pipe is that a layer of special plastic such as polyethylene or epoxy resin is coated on the surface of steel pipe to enhance its corrosion resistance and service life, the sealing performance of plastic coated composite steel pipe is crucial, common plastic coated composite steel pipe is connected by flange, the tighter the bolt is screwed, the tighter the abutment between two sections of steel pipe is, which is beneficial to pipeline sealing, but multiple bolts need to be installed during the connection process, the speed is slow, and the installation efficiency is low.

[0022] In the scheme, when connecting two sections of steel pipe, the plurality of first limit blocks 2 at one end of one steel pipe are clamped with the plurality of second limit blocks 4 at one end of the other steel pipe and rotated, so that the inclined surfaces of first limit block 2 and second limit block 4 are pressed together, in this process, the end of two sections of steel pipe abutting each other is tightly pressed with the movement of first limit block 2 and second limit block 4, a pair of sealing rings 5 are tightly pressed together, the connection surface of two sections of steel pipe is sealed, so that fast connection is realized while ensuring the sealing between steel pipe and steel pipe.

[0023] The side of a plurality of second limit blocks 4 with smaller thickness is provided with positioning block 6, positioning block 6 abuts against second limit block 4, and the thickness of positioning block 6 is greater than the thickness of the end of second limit block 4 abutting against positioning block 6.

[0024] When the corresponding first limiting block 2 and the second limiting block 4 are completely clamped, one end of the first limiting block 2 will move to the position between the positioning block 6 and the second limiting block 4, at which time the end of the first limiting block 2 will be clamped between the second limiting block 4 and the positioning block 6, so that the plurality of first limiting blocks 2 cannot rotate in the opposite direction, thereby causing the complete fixing of the two sections of steel pipes, and the two sections of steel pipes cannot be separated by axial rotation or horizontal pulling.

[0025] The outer end of the sleeve 3 is provided with a plurality of rectangular holes 8, and the end of the plurality of positioning blocks 6 close to each other is integrally formed with a rectangular block 7 matched with the rectangular hole 8. The shape of the rectangular block 7 matches the shape of the inner cavity of the rectangular hole 8. A threaded hole is formed in the rectangular block 7, and a bolt 9 is threadedly connected in the threaded hole. The head size of the bolt 9 is larger than the size of the rectangular hole 8, and the head of the bolt 9 abuts against the outer end of the rectangular hole 8.

[0026] In the present scheme, the positioning block 6 is clamped in the rectangular hole 8 through the rectangular block 7, so that the positioning block 6 cannot rotate in any direction. The rectangular block 7 is fixed to the sleeve 3 through the bolt 9, thereby realizing the fixing of the positioning block 6 and ensuring the stability of the positioning block 6. When the user needs to remove the two sections of steel pipes that have been connected, the user only needs to unscrew the plurality of bolts 9, and then push the plurality of rectangular blocks 7 inwardly of the sleeve 3, so that the plurality of positioning blocks 6 fall off from the sleeve 3. At this time, the plurality of first limiting blocks 2 lose the restriction of the positioning block 6, and can rotate in the opposite direction. After the first limiting block 2 is separated from the second limiting block 4, the two sections of steel pipes can be separated.

[0027] The specific implementation process is as follows:

[0028] When the user connects the two sections of steel pipes, the plurality of first limiting blocks 2 at one end of one steel pipe are clamped with the plurality of second limiting blocks 4 at one end of the other steel pipe and are rotated, so that the inclined surfaces of the first limiting block 2 and the second limiting block 4 are pressed together. When the corresponding first limiting block 2 and the second limiting block 4 are completely clamped, one end of the first limiting block 2 will move to the position between the positioning block 6 and the second limiting block 4, at which time the end of the first limiting block 2 will be clamped between the second limiting block 4 and the positioning block 6, so that the plurality of first limiting blocks 2 cannot rotate in the opposite direction, thereby causing the complete fixing of the two sections of steel pipes. The end of the two sections of steel pipes abutting against each other is tightly pressed along with the movement of the first limiting block 2 and the second limiting block 4. A pair of sealing rings 5 are tightly pressed against each other, thereby sealing the connecting surface of the two sections of steel pipes. When the user needs to remove the two sections of steel pipes that have been connected, the user first needs to unscrew the plurality of bolts 9, and then push the plurality of rectangular blocks 7 inwardly of the sleeve 3, so that the plurality of positioning blocks 6 fall off from the sleeve 3. At this time, the plurality of first limiting blocks 2 lose the restriction of the positioning block 6, and can rotate in the opposite direction. After the first limiting block 2 is separated from the second limiting block 4, the two sections of steel pipes can be separated.

[0029] The above is only the embodiment of the present application, and the known specific technical solutions and / or common knowledge of characteristics in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A coated and coiled steel pipe, characterized by: The utility model provides a pipe body (1), a plurality of first limit blocks (2) are fixedly connected to the edge position of the outer end side of pipe body (1), a plurality of first limit blocks (2) are equidistantly arranged in ring shape with pipe body (1) as the axis, the outer end of pipe body (1) is fixedly connected with sleeve (3) away from first limit block (2) side, the inner wall of sleeve (3) is fixedly connected with a plurality of second limit blocks (4) matched with first limit block (2), and the end of first limit block (2) and second limit block (4) is set to the inclined structure of opposite direction.

2. The coated steel pipe as set forth in claim 1, wherein: Both ends of the pipe body (1) are provided with sealing rings (5), and a pair of sealing rings (5) are arranged on the inner side of the plurality of first limit blocks (2) and the plurality of second limit blocks (4).

3. The coated steel pipe as set forth in claim 1, wherein: The side of the plurality of second limit blocks (4) with smaller thickness is provided with a positioning block (6), the positioning block (6) is in abutment with the second limit block (4), and the thickness of the positioning block (6) is greater than the thickness of the end of the second limit block (4) in abutment with the positioning block (6).

4. The coated steel pipe as set forth in claim 3, wherein: The outer end of the sleeve (3) is provided with a plurality of rectangular holes (8), and the end of the plurality of positioning blocks (6) is integrally formed with a rectangular block (7) matched with the rectangular hole (8).

5. The coated steel pipe as set forth in claim 4, wherein: The rectangular block (7) is provided with a threaded hole, the threaded hole is threadedly connected with a bolt (9), the head size of the bolt (9) is greater than the size of the rectangular hole (8), and the head of the bolt (9) is in abutment with the outer end of the rectangular hole (8).

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