High-temperature plastic seamless steel tube

Abstract

The utility model discloses a high-temperature plastic seamless steel tube, which relates to the technical field of seamless steel tubes and comprises an outer tube and an inner tube, a plastic layer is arranged between the outer tube and the inner tube, the outer wall of the outer tube and the inner wall of the inner tube are coated with corrosion-resistant protective coatings, and a protective tube is sleeved on the outer side of the outer tube. And a plurality of mounting rods which are symmetrically arranged in a surrounding mode are fixedly arranged on the inner wall of the protection pipe, and absorbent cotton covers the rod walls of the mounting rods and covers the outer side of the outer pipe. When the steel pipe is eroded by water for a long time, the water can be rapidly absorbed, the contact time of the water and the steel pipe is shortened, the corrosion-resistant protective layer on the surface of the steel pipe can be stably used for a long time, and the using effect of the steel pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipes, and particularly relates to a high-temperature plastic seamless steel pipe. Background Art

[0002] A high-temperature plastic seamless steel pipe refers to a steel pipe that is processed from an ingot or a billet through manufacturing processes such as hot rolling or cold drawing, has no seams, and has excellent plastic deformation ability at high temperatures.

[0003] After retrieval, a patent document with the publication number CN212337914U discloses a high-plasticity bearing steel pipe. The plastic pipe layer of this steel pipe includes an antioxidant layer, a graphite layer, a carbon fiber layer, a ceramic layer, and a protective layer that are tightly pressed against each other from the outside to the inside; the antioxidant layer is in contact with the inner side of the outer ring of the steel pipe and is located inside the inner side of the outer ring of the steel pipe; the antioxidant layer, the graphite layer, the carbon fiber layer, the ceramic layer, and the protective layer have the same thickness; the plastic pipe layer enables the bearing steel pipe to have antioxidant ability, and the graphite layer improves the overall high-temperature resistance of the steel pipe.

[0004] However, the above seamless steel pipe is protected against corrosion by a protective layer provided on the surface of the steel pipe. However, the corrosion-resistant protective layer will be eroded by liquids such as rainwater during the continuous use of the steel pipe, resulting in the inability of the protective layer to continuously perform the protection work and requiring frequent re-application, which reduces the use effect of the steel pipe. Content of the Utility Model

[0005] In view of the above problems existing in the existing high-temperature plastic seamless steel pipes, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a high-temperature plastic seamless steel pipe, which solves the problem that the corrosion-resistant protective layer will be eroded by liquids such as rainwater during the continuous use of the steel pipe, resulting in the inability of the protective layer to continuously perform the protection work and requiring frequent re-application.

[0007] In order to achieve the above purpose, the present utility model provides the following technical solutions:

[0008] A high-temperature plastic seamless steel pipe includes an outer pipe and an inner pipe. A plastic layer is provided between the outer pipe and the inner pipe, and corrosion-resistant protective coatings are applied to the outer wall of the outer pipe and the inner wall of the inner pipe;

[0009] A protective pipe is sleeved outside the outer pipe. A plurality of mounting rods arranged symmetrically in a surrounding manner are fixedly provided on the inner wall of the protective pipe. A water-absorbing cotton is covered on the rod wall of the mounting rod, and the water-absorbing cotton covers the outside of the outer pipe.

[0010] Preferably, two symmetrically arranged locking bolts are threadedly penetrated through the outer wall of the protective pipe, and the end of the locking bolt is in contact and cooperation with the outer wall of the outer pipe.

[0011] Preferably, through holes for the mounting rod to pass through are formed inside the absorbent cotton, and a limiting mechanism for restricting the position of the absorbent cotton is provided at the lower end of the mounting rod.

[0012] Preferably, the limiting mechanism includes a U-shaped limiting ring. A cross bar is fixedly inserted through the lower end of the rod wall of the mounting rod. The U-shaped limiting ring is sleeved outside the mounting rod and rotatably sleeved outside the rod wall of the cross bar. A connecting plate is fixedly provided on the outer wall of the U-shaped limiting ring. A plug rod is slidably inserted through the inside of the connecting plate. A spring is sleeved on the rod wall of the plug rod, and both ends of the spring are fixedly connected to the plug rod and the connecting plate respectively. Two slots for the plug rod to be inserted into are formed in the rod wall of the mounting rod.

[0013] Furthermore, the mounting rod is an L-shaped rod.

[0014] Preferably, a plurality of ventilation holes are formed in the outer wall of the protective tube.

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0016] 1. In the present utility model, through the provided inner tube, outer tube, plastic layer, protective tube, mounting rod and absorbent cotton, when the steel pipe is eroded by water liquid for a long time, the water liquid can be quickly absorbed, reducing the contact time between the water liquid and the steel pipe, enabling the corrosion-resistant protective layer on the surface of the steel pipe to be stably used for a long time, and improving the use effect of the steel pipe.

[0017] 2. In the present utility model, through the provided mounting rod, absorbent cotton and limiting mechanism, the position of the absorbent cotton can be restricted, and at the same time, it is convenient to quickly replace the absorbent cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a side structural schematic diagram of the present utility model;

[0021] Figure 3 is a connection structural schematic diagram of the mounting rod and the absorbent cotton of the present utility model;

[0022] Figure 4 is of the present utility model Figure 3 A partial enlarged schematic diagram of.

[0023] Description of the reference numerals:

[0024] 1. Outer tube; 2. Inner tube; 3. Plastic layer; 4. Corrosion-resistant protective coating; 5. Protective tube; 6. Mounting rod; 7. Absorbent cotton; 8. Locking bolt; 9. U-shaped limit ring; 10. Cross bar; 11. Connecting plate; 12. Insertion rod; 13. Spring; 14. Slot; 15. Ventilation hole. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further introduced in detail below with reference to the accompanying drawings.

[0026] An embodiment of the present utility model discloses a high-temperature plastic seamless steel pipe.

[0027] Embodiment 1

[0028] The present utility model provides a high-temperature plastic seamless steel pipe as shown in Figures 1-4 which includes an outer tube 1 and an inner tube 2. A plastic layer 3 is provided between the outer tube 1 and the inner tube 2. Corrosion-resistant protective coatings 4 are applied to the outer wall of the outer tube 1 and the inner wall of the inner tube 2;

[0029] A protective tube 5 is sleeved outside the outer tube 1. A plurality of ventilation holes 15 are formed in the outer wall of the protective tube 5. Two symmetrically arranged locking bolts 8 are threadedly penetrated through the outer wall of the protective tube 5. The end of the locking bolt 8 is in contact and cooperation with the outer wall of the outer tube 1. A plurality of mounting rods 6 arranged in a circumferentially symmetric manner are fixedly provided on the inner wall of the protective tube 5. The mounting rod 6 is an L-shaped rod. An absorbent cotton 7 is covered on the rod wall of the mounting rod 6. The absorbent cotton 7 covers the outside of the outer tube 1.

[0030] Before the seamless steel pipe is used, a protective tube 5 is sleeved outside the steel pipe, and the position of the protective tube 5 is determined by the locking bolt 8. Before that, a plurality of absorbent cottons 7 can be sequentially sleeved outside a plurality of mounting rods 6. At this time, after the position of the protective tube 5 is determined, the plurality of absorbent cottons 7 are in end-to-end contact and completely cover the outside of the steel pipe, and can wrap and protect the corrosion-resistant protective coating 4 on the outer wall of the outer tube 1. At this time, when the steel pipe is used, the water liquid contacted by the steel pipe can be absorbed by the absorbent cotton 7, and the erosion of the corrosion-resistant protective coating 4 by the water liquid is avoided as much as possible, and the service strength of the steel pipe is improved.

[0031] Embodiment 2

[0032] On the basis of Embodiment 1, in order to determine the position of the absorbent cotton 7, as shown in Figures 3-4As shown, a through hole for the fitting of the mounting rod 6 to pass through is provided inside the water-absorbing cotton 7. A limiting mechanism for restricting the position of the water-absorbing cotton 7 is provided at the lower end of the mounting rod 6. The limiting mechanism includes a U-shaped limiting ring 9. A cross bar 10 is fixedly penetrated through the lower end of the rod wall of the mounting rod 6. The U-shaped limiting ring 9 is sleeved on the outside of the mounting rod 6 and rotatably sleeved on the outside of the rod wall of the cross bar 10. A connecting plate 11 is fixedly provided on the outer wall of the U-shaped limiting ring 9. A plug rod 12 is slidably penetrated through the inside of the connecting plate 11. A spring 13 is sleeved on the rod wall of the plug rod 12. The two ends of the spring 13 are fixedly connected to the plug rod 12 and the connecting plate 11 respectively. Two slots 14 for the fitting of the plug rod 12 to be inserted are provided on the rod wall of the mounting rod 6.

[0033] Before installing the water-absorbing cotton 7, the plug rod 12 can be pulled to stretch the spring 13. At this time, the plug rod 12 drives the connecting plate 11 to rotate, and the U-shaped limiting ring 9 rotates around the cross bar 10, so that the U-shaped limiting ring 9 rotates to the horizontal position, and then the plug rod 12 is released and inserted into the lower slot 14 under the elastic recovery of the spring 13, so as to complete the positioning of the U-shaped limiting ring 9. At this time, the water-absorbing cotton 7 can be quickly disassembled or installed. After the position of the water-absorbing cotton 7 is determined, the above operation is repeated to make the U-shaped limiting ring 9 arranged outside the water-absorbing cotton 7, so as to complete the positioning of the water-absorbing cotton 7 and ensure the stable use of the water-absorbing cotton 7.

[0034] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A high-temperature plastic seamless steel pipe, comprising an outer pipe (1) and an inner pipe (2), characterized in that, A plastic layer (3) is provided between the outer pipe (1) and the inner pipe (2), and corrosion-resistant protective coatings (4) are applied to the outer wall of the outer pipe (1) and the inner wall of the inner pipe (2); A protective pipe (5) is sleeved outside the outer pipe (1). A plurality of mounting rods (6) arranged symmetrically in a surrounding manner are fixedly provided on the inner wall of the protective pipe (5). A water-absorbing cotton (7) is covered on the rod wall of the mounting rod (6), and the water-absorbing cotton (7) covers the outside of the outer pipe (1).

2. The high-temperature plastic seamless steel pipe according to claim 1, wherein Two symmetrically arranged locking bolts (8) are threadedly penetrated through the outer wall of the protective pipe (5), and the end of the locking bolt (8) is in contact and cooperation with the outer wall of the outer pipe (1).

3. The high-temperature plastic seamless steel pipe according to claim 1, characterized in that, A through hole for the mounting rod (6) to pass through is formed inside the water-absorbing cotton (7), and a limiting mechanism for limiting the position of the water-absorbing cotton (7) is provided at the lower end of the mounting rod (6).

4. The high-temperature plastic seamless steel pipe according to claim 3, characterized in that, The limiting mechanism includes a U-shaped limiting ring (9). A cross bar (10) is fixedly penetrated through the lower end of the rod wall of the mounting rod (6). The U-shaped limiting ring (9) is sleeved on the outside of the mounting rod (6) and rotatably sleeved on the outside of the rod wall of the cross bar (10). A connecting plate (11) is fixedly provided on the outer wall of the U-shaped limiting ring (9). A plug rod (12) is slidably penetrated through the inside of the connecting plate (11). A spring (13) is sleeved on the rod wall of the plug rod (12), and the two ends of the spring (13) are fixedly connected to the plug rod (12) and the connecting plate (11) respectively. Two slots (14) for the plug rod (12) to be inserted into are formed on the rod wall of the mounting rod (6).

5. The high-temperature plastic seamless steel pipe according to claim 1, characterized in that, The mounting rod (6) is an L-shaped rod.

6. The high-temperature plastic seamless steel pipe according to claim 1, characterized in that, A plurality of ventilation holes (15) are formed on the outer wall of the protective pipe (5).

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