Welded pipe with high bending strength

Abstract

The utility model discloses a welded pipe with high bending strength, which relates to the field of welded pipes and comprises an outer pipe body, an inner pipe body is arranged inside the outer pipe body, the outer end of the inner pipe body is fixedly connected with the inner wall of the outer pipe body, welding seams of the outer pipe body and the inner pipe body are staggered, and reinforcing grooves are arranged on two sides of the outer pipe body so as to connect the outer pipe body and the inner pipe body. Three hollow reinforcing ribs and a solid reinforcing rib are fixedly arranged on the inner wall of the inner pipe body, and the cross sections of the solid reinforcing rib and the hollow reinforcing ribs are triangular. The main body part of the welded pipe is formed by the outer pipe body and the inner pipe body, and the weld joints of the outer pipe body and the inner pipe body are staggered, so that the outer pipe body and the inner pipe body can seal and reinforce the weld joints of each other, the weld joints of the welded pipe are firmer, and damage and leakage are avoided.

Description

Technical Field

[0001] The utility model relates to the field of welded pipes, in particular to a high bending strength welded pipe. Background Art

[0002] Welded pipe is a welded steel pipe, which is made by curling and welding strip steel or steel plate. Compared with seamless steel pipe, the strength of welded pipe is lower, but the production and processing difficulty is small, the efficiency is high, and there are more varieties and specifications.

[0003] The application range of welded pipes is very wide. Water and gas pipelines commonly used in production and life can be made of welded pipes as raw materials. In order to improve the performance of welded pipes, welded pipes in the prior art have been strengthened to a certain extent in structure, such as a high bending strength welded pipe with publication number CN215725319U.

[0004] The weld of the welded pipe is the part with lower strength at the outer end. However, in the prior art, no targeted reinforcement is made to the weld, and the weld is more prone to damage and leakage. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a high bending strength welded pipe, the main part of which is composed of an outer tube body and an inner tube body, and the weld positions of the outer tube body and the inner tube body are staggered. In this way, the outer tube body and the inner tube body can both seal and reinforce each other's welds, making the weld parts of the welded pipe stronger and avoiding damage and leakage, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the utility model is: a high bending strength welded pipe, comprising an outer pipe body, an inner pipe body is arranged inside the outer pipe body, the outer end of the inner pipe body is fixedly connected to the inner wall of the outer pipe body, and the welds of the outer pipe body and the inner pipe body are staggered;

[0007] Reinforcement grooves are provided on both sides of the outer tube body, and the outer tube body and the inner tube body are welded to each other at the reinforcement grooves. The reinforcement grooves are filled with liquid metal melted by the welding rod to connect the outer tube body and the inner tube body. Three hollow reinforcement ribs and one solid reinforcement rib are fixedly provided on the inner wall of the inner tube body, and the cross-sections of the solid reinforcement ribs and the hollow reinforcement ribs are both triangular.

[0008] Furthermore, a protective layer is fixedly provided on the outer end of the outer tube body, and the protective layer includes a waterproof coating sprayed on the outer end of the outer tube body, the waterproof coating is made of acrylic ester, and can block the outer tube body from moisture; the outer end of the waterproof coating is sprayed with a wear-resistant coating, and the wear-resistant coating is made of a mixture of phenolic resin, colloidal graphite powder and quartz powder, and can reduce the wear of the outer tube body during use.

[0009] Furthermore, a mesh tube is provided inside the inner tube body, and the mesh tube can increase the heat dissipation area of ​​the welded tube, and the outer end of the mesh tube is fixedly connected to the hollow reinforcement rib and the solid reinforcement rib.

[0010] Furthermore, a reinforcement spring is provided at the outer end of the outer tube body, and the elastic force of the reinforcement spring can play a buffering role when the outer tube body is bent under force. Slip rings are fixed at both ends of the reinforcement spring, and the slip ring sleeve is arranged on the outer end of the outer tube body. A fastening bolt is installed on the outer end of the slip ring through a thread, and the reinforcement spring can be fixed by tightening the fastening bolt.

[0011] Furthermore, a heat preservation component is provided at the outer end of the outer tube, and the heat preservation component includes a heat preservation sleeve sleeved on the outer end of the outer tube, and the heat preservation sleeve can insulate the outer tube body and the medium flowing inside the outer tube body, and zippers are fixedly provided on both sides of the heat preservation sleeve, and the heat preservation sleeve can be separated into two parts by unzipping the zippers, so as to disassemble the heat preservation component as a whole;

[0012] Two semicircular connecting rings are fixedly provided at both ends of the thermal insulation sleeve and are connected to each other by bolts. The two semicircular connecting rings can be disassembled and separated from each other, and the two semicircular connecting rings are respectively fixed to the two parts of the thermal insulation sleeve.

[0013] Furthermore, the thermal insulation cover includes a thermal insulation cloth made of polyester fiber, which can hinder the spread of heat. A canvas is fixed on the top of the thermal insulation cloth. The canvas is hard and wear-resistant, and can reduce the wear of the thermal insulation cover during use.

[0014] Compared with the prior art, the utility model provides a high bending strength welded pipe, which has the following beneficial effects:

[0015] 1. The main part of the welded pipe is composed of an outer pipe body and an inner pipe body, and the weld positions of the outer pipe body and the inner pipe body are staggered. In this way, the outer pipe body and the inner pipe body can seal and reinforce each other's welds, making the weld parts of the welded pipe stronger and avoiding damage and leakage.

[0016] 2. By setting solid reinforcement ribs, the welded pipe is reinforced against bending and the solid reinforcement ribs lower the center of gravity of the welded pipe to prevent the welded pipe from rolling randomly during placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 It is a schematic diagram of the reinforcement state of the utility model;

[0019] Figure 3 This is a schematic diagram of the warming state of the utility model;

[0020] Figure 4It is a cross-sectional view of the protective layer of the utility model;

[0021] Figure 5 It is a cross-sectional view of the thermal insulation sleeve of the present utility model.

[0022] In the figure: 1. outer tube body; 2. inner tube body; 3. mesh tube; 4. reinforcement groove; 5. solid reinforcement rib; 6. hollow reinforcement rib; 7. insulation component; 701. insulation sleeve; 702. zipper; 703. semicircular connecting ring; 8. slip ring; 9. reinforcement spring; 10. canvas; 11. insulation fabric; 12. wear-resistant coating; 13. waterproof coating. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1-5 As shown, the utility model provides a high bending strength welded pipe, comprising an outer pipe body 1, an inner pipe body 2 is arranged inside the outer pipe body 1, the outer end of the inner pipe body 2 is fixedly connected to the inner wall of the outer pipe body 1, and the welds of the outer pipe body 1 and the inner pipe body 2 are staggered with each other;

[0025] Reinforcement grooves 4 are provided on both sides of the outer tube body 1. The outer tube body 1 and the inner tube body 2 are welded to each other at the reinforcement grooves 4. The reinforcement grooves 4 are filled with liquid metal melted by the welding rod to connect the outer tube body 1 and the inner tube body 2. Three hollow reinforcement ribs 6 and one solid reinforcement rib 5 are fixedly provided on the inner wall of the inner tube body 2. The cross-sections of the solid reinforcement ribs 5 and the hollow reinforcement ribs 6 are both triangular.

[0026] The main body of the welded pipe is composed of an outer pipe body 1 and an inner pipe body 2. The outer pipe body 1 is sleeved on the outer end of the inner pipe body 2 and welded to the inner pipe body 2 as a whole. The weld positions of the outer pipe body 1 and the inner pipe body 2 are staggered. In this way, the outer pipe body 1 can seal and reinforce the weld of the inner pipe body 2, and the inner pipe body 2 can also seal and reinforce the weld of the outer pipe body 1, so that the weld of the welded pipe is more solid to avoid damage and leakage.

[0027] Solid reinforcement ribs 5 and hollow reinforcement ribs 6 are welded on the inner wall of the inner tube body 2, and the cross-sections of the two are triangular, so they have an anti-bending effect. The outer tube body 1 and the inner tube body 2 are reinforced from the inside, which improves the bending resistance of the welded pipe. The hollow reinforcement ribs 6 are hollow inside, which can reduce the obstruction to the fluid and reduce the overall weight of the welded pipe. The solid reinforcement ribs 5 are solid and heavier than the hollow reinforcement ribs 6. Therefore, the solid reinforcement ribs 5 lower the center of gravity of the welded pipe. When the welded pipe is placed normally, the solid reinforcement ribs 5 will drive the outer tube body 1 and the inner tube body 2 to rotate under the action of their own gravity until the solid reinforcement ribs 5 rotate to the lowest point and maintain this position as much as possible. Therefore, the solid reinforcement ribs 5 can stabilize the center of gravity of the welded pipe while reinforcing the welded pipe to prevent the welded pipe from rolling at will during the placement process.

[0028] In order to improve the service life of the welded pipe, Figure 1 , 4 As shown, a protective layer is fixedly provided at the outer end of the outer tube body 1, and the protective layer includes a waterproof coating 13 sprayed on the outer end of the outer tube body 1. The waterproof coating 13 is made of acrylic ester, which can block the outer tube body 1 from moisture, so that the outer tube body 1 cannot directly contact with moisture, and will not be oxidized and rusted due to water. The outer end of the waterproof coating 13 is sprayed with a wear-resistant coating 12, and the wear-resistant coating 12 is made of a mixture of phenolic resin, colloidal graphite powder and quartz powder. Spraying the wear-resistant coating 12 on the outermost layer can improve the strength of the surface of the outer tube body 1, thereby reducing the wear of the outer tube body 1 during use and extending its service life.

[0029] A mesh tube 3 is provided inside the inner tube body 2 , and the mesh tube 3 can increase the heat dissipation area of ​​the welded tube. The outer end of the mesh tube 3 is fixedly connected to the hollow reinforcement rib 6 and the solid reinforcement rib 5 .

[0030] In order to further increase the bending resistance of the welded pipe, Figure 2 As shown, a reinforcing spring 9 is provided at the outer end of the outer tube body 1. The elastic force of the reinforcing spring 9 can play a buffering role when the outer tube body 1 is bent under force. Slip rings 8 are fixedly provided at both ends of the reinforcing spring 9. The slip ring 8 is sleeved on the outer end of the outer tube body 1. A fastening bolt is installed on the outer end of the slip ring 8 through a thread. The reinforcing spring 9 can be fixed by tightening the fastening bolt.

[0031] When the welded pipe needs to withstand a large external force during use, the reinforcing spring 9 can be sleeved on the stress-bearing part of the outer end of the outer tube body 1, and the fastening bolts on the slip ring 8 can be tightened to fix the positions of the slip ring 8 and the reinforcing spring 9. The reinforcing spring 9 can use its elastic force to buffer when the welded pipe is bent under force, thereby improving the bending resistance of the welded pipe.

[0032] In winter, the welded pipe needs to be kept warm. Figure 3 , 5As shown, the outer end of the outer tube body 1 is provided with an insulation component 7, and the insulation component 7 includes an insulation sleeve 701 sleeved on the outer end of the outer tube body 1, and the insulation sleeve 701 can insulate the outer tube body 1 and the medium flowing inside thereof, and zippers 702 are fixedly provided on both sides of the insulation sleeve 701. When the zippers 702 are opened, the insulation sleeve 701 can be split into two parts, so that the insulation component 7 can be disassembled as a whole;

[0033] Two semicircular connecting rings 703 connected to each other by bolts are fixedly provided at both ends of the thermal insulation sleeve 701. The two semicircular connecting rings 703 can be disassembled and separated from each other. The two semicircular connecting rings 703 are respectively fixed to two parts of the thermal insulation sleeve 701.

[0034] The thermal insulation cover 701 includes a thermal insulation fabric 11, which is made of polyester fiber and can prevent the spread of heat. A canvas 10 is fixed on the top of the thermal insulation fabric 11. The canvas 10 is hard and wear-resistant and can reduce the wear of the thermal insulation cover 701 during use.

[0035] The welded pipe is often used as a water and gas pipeline, so it needs to be properly kept warm in winter. When warmth is needed, the two parts of the insulation cover 701 are both put on the outer end of the warming part, and then the two parts of the insulation cover 701 are connected by a zipper, and then the two semicircular connecting rings 703 at the corresponding end are connected to each other by bolts, so that the insulation component 7 can be fixed as a whole to the outer end of the outer tube body 1. The insulation cover 701 consists of two parts: canvas 10 and heat-insulating fabric 11, which is both strong and wear-resistant, and can insulate and keep warm.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high bending strength welded pipe, comprising an outer pipe body (1), characterized in that: An inner tube body (2) is arranged inside the outer tube body (1), the outer end of the inner tube body (2) is fixedly connected to the inner wall of the outer tube body (1), and the welds of the outer tube body (1) and the inner tube body (2) are staggered with each other; Reinforcement grooves (4) are provided on both sides of the outer tube body (1); the outer tube body (1) and the inner tube body (2) are welded to each other at the reinforcement grooves (4); three hollow reinforcement ribs (6) and one solid reinforcement rib (5) are fixedly provided on the inner wall of the inner tube body (2); and the cross sections of the solid reinforcement rib (5) and the hollow reinforcement rib (6) are both triangular.

2. A high bending strength welded pipe according to claim 1, characterized in that: The outer end of the outer tube body (1) is fixedly provided with a protective layer, the protective layer comprising a waterproof coating (13) sprayed on the outer end of the outer tube body (1), and the outer end of the waterproof coating (13) is sprayed with a wear-resistant coating (12).

3. The high bending strength welded pipe according to claim 1, characterized in that: A mesh tube (3) is provided inside the inner tube body (2), and the outer end of the mesh tube (3) is fixedly connected to the hollow reinforcement rib (6) and the solid reinforcement rib (5).

4. The high bending strength welded pipe according to claim 1, characterized in that: A reinforcing spring (9) is provided at the outer end of the outer tube body (1), and a slip ring (8) is fixedly provided at both ends of the reinforcing spring (9). The slip ring (8) is sleeved on the outer end of the outer tube body (1), and a fastening bolt is threadedly mounted on the outer end of the slip ring (8).

5. The high bending strength welded pipe according to claim 1, characterized in that: The outer end of the outer tube body (1) is provided with a heat-insulating component (7), the heat-insulating component (7) comprising a heat-insulating sleeve (701) sleeved on the outer end of the outer tube body (1), zippers (702) are fixedly provided on both sides of the heat-insulating sleeve (701), and the heat-insulating sleeve (701) can be separated into two parts by opening the zippers (702); Two semicircular connecting rings (703) connected to each other by bolts are fixedly provided at both ends of the thermal insulation sleeve (701), and the two semicircular connecting rings (703) are respectively fixed on two parts of the thermal insulation sleeve (701).

6. The high bending strength welded pipe according to claim 5, characterized in that: The thermal insulation sleeve (701) comprises a thermal insulation cloth (11), and a canvas (10) is fixedly provided on the top end of the thermal insulation cloth (11).

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