Anti-corrosion composite steel pipe with plastic coated inside and outside

Abstract

The utility model belongs to the technical field of corrosion prevention of steel pipes, and particularly relates to an anti-corrosion composite steel pipe with plastic coated inside and outside, a pipe body I and a pipe body II are sleeved on the outer wall, a sealing strip is embedded in the pipe body II, a fixing device is arranged on the outer wall of the pipe body II, and the fixing device is connected with the pipe body I and the pipe body II. Convex rings are fixedly connected to the outer wall of the first pipe body and the outer wall of the second pipe body, the fixing device comprises a first fixing block, and the first fixing block is fixedly connected to the outer wall of the first pipe body. According to the anti-corrosion inside and outside plastic-coated composite steel pipe, the first pipe body, the second pipe body and the fixing device are used, so that the first pipe body and the second pipe body can be rapidly connected to the outer wall in a sleeving mode for protection and are prevented from being corroded by external erosion, and meanwhile when the first pipe body and the second pipe body are damaged, the first pipe body and the second pipe body are not damaged. The first pipe body and the second pipe body can be independently and rapidly detached and replaced, the maintenance cost is reduced, and meanwhile the anti-corrosion effect of the composite steel pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe anti-corrosion, in particular to an anti-corrosion internal and external plastic-coated composite steel pipe. Background Art

[0002] The internal and external plastic-coated composite steel pipe is a steel-plastic composite pipe made of welded steel pipe as the base material, and is made by sandblasting and chemical double pre-treatment, preheating, internal and external coating, curing, post-treatment and other processes. It has excellent comprehensive performance, strong corrosion resistance and mechanical properties, good chemical stability and water resistance, and has the functions of drag reduction, corrosion resistance, pressure resistance, and antibacterial.

[0003] At present, composite steel pipes with larger diameters or longer lengths are often in a complex working environment during use, which causes external objects to scratch the composite steel pipes, and the anti-corrosion coating on the outer wall of the steel pipe will be worn, thereby reducing the corrosion resistance of the steel pipe and shortening the service life of the composite steel pipe. In view of this, we propose an anti-corrosion internal and external plastic-coated composite steel pipe. Utility Model Content

[0004] The main purpose of the utility model is to provide an anti-corrosion internal and external plastic-coated composite steel pipe, which can solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model proposes an anti-corrosion internal and external plastic-coated composite steel pipe, comprising a pipe body 1, the pipe body 1 is detachably connected to a pipe body 2, a sealing strip is embedded in the pipe body 2, and a fixing device is arranged on the outer wall of the pipe body 2, and the fixing device comprises:

[0006] A fixing block 1, wherein the fixing block 1 is fixedly connected to the outer wall of the tube body 1, and a fixing block 2 is fixedly connected to the outer wall of the tube body 2;

[0007] A limiting component, wherein the limiting component is arranged on the outer wall of the second fixing block;

[0008] And a positioning component, wherein the positioning component is arranged on the limiting component.

[0009] Preferably, the limit assembly includes a limit sleeve, a slip ring is slidably connected to the inner wall of the limit sleeve, the slip ring is penetrated by a pull rod and fixedly connected to the pull rod, the end of the pull rod away from the fixed block is rotatably connected to a rotating plate, and the limit block is fixedly connected to the outer wall of the limit sleeve, and the slip ring can be driven to slide in the inner wall of the limit sleeve by pulling the pull rod.

[0010] Preferably, the pull rod passes through the limiting sleeve and is slidably connected to the limiting sleeve.

[0011] Preferably, the positioning assembly includes a block, which is fixedly connected to the outer wall of the limiting sleeve, a slider is slidably connected to the inner wall of the block, a trapezoidal block is fixedly connected to the outer wall of the slider, a hinged rod is hinged on the outer wall of the slider, and a moving block is hinged at one end of the hinged rod away from the slider. When tube body 1 and tube body 2 are spliced ​​together, fixed block 1 squeezes the trapezoidal block, so that the two groups of trapezoidal block squeeze reset springs contract. After fixed block 1 passes through the trapezoidal block, the trapezoidal block pops out under the action of the reset spring, thereby realizing the limiting fixation of fixed block 1 and stably splicing tube body 1 and tube body 2.

[0012] Preferably, two groups of the sliding blocks are provided, and the two groups of the sliding blocks are elastically connected via a return spring.

[0013] Preferably, the moving block is slidably connected to the inner wall of the block, and the moving block is fixedly connected to the pull rod.

[0014] Preferably, convex rings are fixedly connected to the outer walls of the tube body 1 and the tube body 2.

[0015] The utility model provides a corrosion-resistant internal and external plastic-coated composite steel pipe, which has the following beneficial effects:

[0016] (1) The corrosion-resistant inner and outer plastic-coated composite steel pipe uses a pipe body 1, a pipe body 2 and a fixing device, so that the pipe body 1 and the pipe body 2 can be quickly sleeved on the outer wall to protect them from corrosion caused by external erosion. At the same time, when the pipe body 1 and the pipe body 2 are damaged, the pipe body 1 and the pipe body 2 can be quickly disassembled and replaced separately, reducing maintenance costs while ensuring the corrosion-resistant effect of the composite steel pipe.

[0017] (2) The corrosion-resistant inner and outer plastic-coated composite steel pipe uses a sealing strip to position the pipe body 1 and the pipe body 2 when they are assembled. At the same time, when a gap exists between the pipe body 1 and the pipe body 2 after thermal expansion and contraction, the sealing strip can prevent external erosion, further protect the composite steel pipe, and improve the corrosion resistance of the composite steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0020] Figure 2This is a schematic diagram of the structure of the fixing device of the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixing device of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the second tube body of the second embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of a tube body 1 of the second embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the present utility model.

[0025] Description of Figure Numbers:

[0026] 1. Tube body 1; 2. Tube body 2; 4. Sealing strip; 5. Fixing device; 6. Convex ring; 51. Fixing block 1; 52. Fixing block 2; 53. Limiting assembly; 54. Positioning assembly; 531. Limiting sleeve; 532. Slip ring; 533. Pull rod; 534. Rotating plate; 535. Limiting block; 541. Block; 542. Sliding block; 543. Trapezoidal block; 544. Reset spring; 545. Articulated rod; 546. Moving block.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] 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.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 3 The utility model proposes an anti-corrosion inner and outer plastic-coated composite steel pipe, comprising a pipe body 1, wherein the pipe body 1 is detachably connected to a pipe body 2, the outer walls of the pipe body 1 and the pipe body 2 are coated with anti-corrosion paint, a sealing strip 4 is embedded in the pipe body 2, and a fixing device 5 is arranged on the outer wall of the pipe body 2.

[0031] In the embodiment of the utility model, in order to quickly fix the tube body 1 and the tube body 2, specifically, the fixing device 5 includes a fixing block 1 51, a limiting assembly 53 and a positioning assembly 54. The fixing block 1 51 is fixedly connected to the outer wall of the tube body 1, and the outer wall of the tube body 2 is fixedly connected with a fixing block 2 52. The limiting assembly 53 is arranged on the outer wall of the fixing block 2 52, and the positioning assembly 54 is arranged on the limiting assembly 53. The limiting assembly 53 includes a limiting sleeve 531, and a slip ring 532 is slidably connected to the inner wall of the limiting sleeve 531. The slip ring 532 is penetrated by the pull rod 533 and fixedly connected to the pull rod 533. The end of the pull rod 533 away from the fixing block 51 is rotatably connected with a rotating plate 534. The pull rod 533 penetrates the limiting sleeve 531 and is slidably connected to the limiting sleeve 531. The limiting block 535 is fixedly connected to the outer wall of the limiting sleeve 531. The positioning assembly 54 includes a block 541, and the block 541 is fixedly connected to the limiting sleeve 531. On the outer wall of the sleeve 531, a slider 542 is slidably connected in the inner wall of the block 541. The slider 542 is provided with two groups, and the two groups of sliders 542 are elastically connected by a return spring 544. A trapezoidal block 543 is fixedly connected to the outer wall of the slider 542. A hinge rod 545 is hinged on the outer wall of the slider 542. A moving block 546 is hinged at one end of the hinge rod 545 away from the slider 542. The moving block 546 is slidably connected to the inner wall of the block 541. The moving block 546 is fixedly connected to the pull rod 533. When the tube body 1 and the tube body 2 are assembled, the fixed block 1 51 squeezes the trapezoidal block 543, so that the two groups of trapezoidal blocks 543 squeeze the reset spring 544 to contract. After the fixed block 1 51 passes through the trapezoidal block 543, the trapezoidal block 543 pops out under the action of the reset spring 544, thereby limiting the fixing of the fixed block 1 51, making the tube body 1 and the tube body 2 2 stably assembled, and achieving the effect of quickly fixing the tube body 1 and the tube body 2 2.

[0032] Furthermore, after the tube body 1 or the tube body 2 is damaged, it can be quickly replaced separately to reduce maintenance costs. Specifically, by pulling the rotating plate 534, the pull rod 533 is driven to move. After the rotating plate 534 passes through the limit block 535, the rotating plate 534 is twisted to rotate so that the rotating plate 534 is limited by the limit block 535. During this process, the movement of the pull rod 533 drives the moving block 546 to move, and then under the action of the hinge rod 545, the two groups of sliders 542 compress the reset spring 544, and the trapezoidal block 543 shrinks into the square block 541, releasing the limit fixation of the fixed block 1 51, and then the limit fixation of multiple groups of fixed blocks 1 51 is released in turn, so that the tube body 1 or the tube body 2 2 is separated, and then the damaged tube body 1 or the tube body 2 2 can be quickly replaced separately.

[0033] Embodiment 2

[0034] Based on Example 1, please refer to Figure 4-Figure 6The outer walls of the tube body 1 and the tube body 2 are fixedly connected with a convex ring 6. By using the convex ring 6, the tube body 1 and the tube body 2 can be protected and the wear of the tube body 1 and the tube body 2 can be reduced.

[0035] When in use, the sealing strip 4 is first embedded in the tube body 2, and then the tube body 1 and the tube body 2 are spliced. In this process, the fixing block 1 51 squeezes the trapezoidal block 543, so that the two groups of trapezoidal blocks 543 squeeze the reset spring 544 to contract. After the fixing block 1 51 passes through the trapezoidal block 543, the trapezoidal block 543 pops out under the action of the reset spring 544, thereby realizing the limit fixation of the fixing block 1 51, so that the tube body 1 and the tube body 2 are stably spliced. In addition, after the tube body 1 or the tube body 2 is damaged, it can be quickly replaced separately to reduce maintenance costs. Specifically, by pulling the rotating plate 534 , driving the pull rod 533 to move, after the rotating plate 534 passes through the limit block 535, the rotating plate 534 is twisted to rotate, so that the rotating plate 534 is limited by the limit block 535. In this process, the pull rod 533 moves and drives the moving block 546 to move, and then under the action of the hinge rod 545, the two groups of sliders 542 compress the reset spring 544, and the trapezoidal block 543 shrinks into the square block 541, releasing the limit fixation of the fixed block 51, and then releasing the limit fixation of multiple groups of fixed blocks 51 in turn, so that the tube body 1 or the tube body 2 2 can be separated, so that the damaged tube body 1 or the tube body 2 2 can be replaced separately.

[0036] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A corrosion-resistant internal and external plastic-coated composite steel pipe, comprising a pipe body (1), characterized in that: The first tube body (1) is detachably connected to the second tube body (2), a sealing strip (4) is embedded in the second tube body (2), and a fixing device (5) is arranged on the outer wall of the second tube body (2), and the fixing device (5) comprises: A fixing block 1 (51), the fixing block 1 (51) being fixedly connected to the outer wall of the tube body 1 (1), and a fixing block 2 (52) being fixedly connected to the outer wall of the tube body 2 (2); A limiting component (53), wherein the limiting component (53) is arranged on the outer wall of the second fixing block (52); and a positioning assembly (54), wherein the positioning assembly (54) is arranged on the limiting assembly (53).

2. The corrosion-resistant internal and external plastic-coated composite steel pipe according to claim 1, characterized in that: The limiting assembly (53) comprises a limiting sleeve (531), a slip ring (532) is slidably connected to the inner wall of the limiting sleeve (531), the slip ring (532) is penetrated by a pull rod (533) and is fixedly connected to the pull rod (533), one end of the pull rod (533) away from the fixed block (51) is rotatably connected to a rotating plate (534), and a limiting block (535) is fixedly connected to the outer wall of the limiting sleeve (531).

3. The corrosion-resistant internal and external plastic-coated composite steel pipe according to claim 2, characterized in that: The pull rod (533) passes through the limiting sleeve (531) and is slidably connected to the limiting sleeve (531).

4. The corrosion-resistant internal and external plastic-coated composite steel pipe according to claim 2, characterized in that: The positioning assembly (54) comprises a block (541), wherein the block (541) is fixedly connected to the outer wall of the limiting sleeve (531), a slider (542) is slidably connected to the inner wall of the block (541), a trapezoidal block (543) is fixedly connected to the outer wall of the slider (542), a hinged rod (545) is hinged to the outer wall of the slider (542), and a moving block (546) is hinged to one end of the hinged rod (545) away from the slider (542).

5. The corrosion-resistant internal and external plastic-coated composite steel pipe according to claim 4, characterized in that: The sliders (542) are provided in two groups, and the two groups of sliders (542) are elastically connected via a return spring (544).

6. The corrosion-resistant internal and external plastic-coated composite steel pipe according to claim 5, characterized in that: The moving block (546) is slidably connected to the inner wall of the block (541), and the moving block (546) is fixedly connected to the pull rod (533).

7. The corrosion-resistant internal and external plastic-coated composite steel pipe according to claim 1, characterized in that: A convex ring (6) is fixedly connected to the outer wall of the tube body 1 (1) and the outer wall of the tube body 2 (2).

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