High-temperature-resistant stainless steel pipe

Abstract

The utility model discloses a high-temperature-resistant stainless steel pipe which comprises an inner-layer steel pipe, a plurality of fixing frames are installed on the outer side wall of the inner-layer steel pipe, limiting grooves are formed in one sides of the fixing frames in a penetrating mode, an outer-layer steel pipe is arranged on the outer side wall of the inner-layer steel pipe, and a plurality of sliding grooves are formed in one side of the inner wall of the outer-layer steel pipe. And the inner walls of the multiple sliding grooves are slidably connected with one ends of the multiple fixing frames correspondingly, two rotating sliding grooves are formed in the other side of the inner wall of the outer-layer steel pipe, and the inner walls of the two rotating sliding grooves are slidably connected with rotating rings correspondingly. The fixing bolts are loosened, limitation of the fixing bolts and the second fixing lugs is relieved, the handle is rotated, the rotating ring rotates along the inner wall of the rotating sliding groove, the L-shaped limiting frame slides out of the limiting groove, limitation of the inner-layer steel pipe is relieved, and then the inner-layer steel pipe slides out of the outer-layer steel pipe. Therefore, the inner-layer steel pipe or the outer-layer steel pipe can be replaced, and the replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel pipes, in particular to a high-temperature resistant stainless steel pipe. Background Art

[0002] High temperature resistant stainless steel pipe, also known as stainless steel, is austenitic chromium-nickel stainless steel with excellent oxidation resistance and corrosion resistance. Because of the higher percentage of chromium and nickel, it has much better creep strength, can operate continuously at high temperatures, and has good high temperature resistance. It is widely used in domestic and foreign petroleum, chemical, pharmaceutical, papermaking, shipbuilding, food, nuclear power, military industry, machinery, environmental protection, automobile manufacturing and other industries.

[0003] At present, high-temperature resistant stainless steel pipes used to transport high-temperature steam use steel-jacketed stainless steel pipes to prevent thermal expansion and contraction. However, after long-term use, if the inner and outer steel pipes are damaged, the inner and outer welding fixing frames need to be cut off and replaced. This process is cumbersome and inconvenient to use. Summary of the invention

[0004] The purpose of the utility model is to provide a high temperature resistant stainless steel pipe to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature resistant stainless steel pipe, comprising an inner steel pipe, the outer wall of the inner steel pipe is installed with multiple fixing frames, one side of each of the multiple fixing frames is penetrated by a limiting groove, the outer wall of the inner steel pipe is provided with an outer steel pipe, one side of the inner wall of the outer steel pipe is provided with multiple sliding grooves, the inner walls of the multiple sliding grooves are respectively slidably connected to one end of the multiple fixing frames, two rotating grooves are provided on the other side of the inner wall of the outer steel pipe, the inner walls of the two rotating grooves are slidably connected with rotating rings, one side of the inner walls of the two rotating rings are fixedly connected with multiple L-shaped limiting frames, and the outer walls of the multiple L-shaped limiting frames are slidably connected to the inner walls of the multiple limiting grooves.

[0006] As a further preferred embodiment of the present technical solution, a plurality of fixing ears 2 are fixedly connected to the other side of the inner wall of the rotating ring, a plurality of fixing ears 1 are fixedly connected to the other side of the inner wall of the outer steel pipe and near the edge, a fixing bolt is threadedly connected to one side of the plurality of fixing ears 1, and the outer side walls of the plurality of fixing bolts are respectively threadedly connected to the inner walls of the plurality of fixing ears 2.

[0007] As a further preferred embodiment of the present technical solution, one end of the inner steel pipe is fixedly connected with a socket, the other end of the inner steel pipe is provided with a slot, the outer wall of the socket is clamped with the inner wall of the slot, and a flange ring is fixedly connected to the outer wall of the inner steel pipe near the edge.

[0008] As a further preferred embodiment of the present technical solution, a handle is provided on one side of the L-shaped limit frame, and one side of the handle is fixedly connected to one side of the inner wall of the rotating ring.

[0009] As a further preferred embodiment of the present technical solution, the outer surface of the outer steel pipe is coated with an anti-corrosion film, the inner wall of the inner steel pipe is coated with a composite high-temperature resistant film, and the outer wall of the inner steel pipe is sleeved with thermal insulation cotton.

[0010] The utility model provides a high temperature resistant stainless steel pipe, which has the following beneficial effects:

[0011] 1. The utility model releases the restriction of the fixing bolt and the fixing ear by loosening the fixing bolt, and rotates the handle to make the rotating ring rotate along the inner wall of the rotating slide groove, so that the L-shaped limit frame slides out of the limit groove, releases the restriction of the inner steel pipe, and then slides the inner steel pipe out of the outer steel pipe, so that the inner steel pipe or the outer steel pipe can be replaced, thereby improving the replacement efficiency.

[0012] 2. The utility model provides the thermal insulation cotton, which can ensure that the temperature between the outer steel pipe and the inner steel pipe will not be too low, thereby preventing the steel pipe from being damaged by thermal expansion and contraction and increasing the service life of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0014] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0015] Figure 3 This is a schematic diagram of the connection relationship between the outer steel pipe and the inner steel pipe in the utility model;

[0016] Figure 4 It is a schematic diagram of the explosion structure of the outer steel pipe in the utility model;

[0017] In the figure: 1. Inner steel pipe; 2. Outer steel pipe; 3. Anti-corrosion film; 4. Composite high temperature resistant film; 5. Socket; 6. Flange ring; 7. Fixing frame; 8. Insulation cotton; 9. Slot; 10. Fixing ear one; 11. Fixing bolt; 12. Rotating slide groove; 13. Rotating ring; 14. Limiting groove; 15. L-shaped limiting frame; 16. Fixing ear two; 17. Handle; 18. Sliding groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The utility model provides a technical solution: Figure 1 - Figure 4As shown, in this embodiment, a high-temperature resistant stainless steel pipe includes an inner steel pipe 1, and the outer wall of the inner steel pipe 1 is installed with a plurality of fixing frames 7, and one side of the plurality of fixing frames 7 is penetrated with a limiting groove 14, and the outer wall of the inner steel pipe 1 is provided with an outer steel pipe 2, and one side of the inner wall of the outer steel pipe 2 is provided with a plurality of sliding grooves 18, and the inner walls of the plurality of sliding grooves 18 are respectively slidably connected with one end of the plurality of fixing frames 7, and the other side of the inner wall of the outer steel pipe 2 is provided with two rotating slide grooves 12, and the inner walls of the two rotating slide grooves 12 are slidably connected with a rotating ring 13, and the two rotating rings 13 are slidably connected. A plurality of L-shaped limit frames 15 are fixedly connected to one side of the inner wall of 3, and the outer side walls of the plurality of L-shaped limit frames 15 are slidably connected to the inner walls of the plurality of limit grooves 14. By loosening the fixing bolts 11, the restrictions on the fixing bolts 11 and the fixing ears 16 are released, and the handle 17 is turned to rotate the rotating ring 13 along the inner wall of the rotating slide groove 12, so that the L-shaped limit frames 15 slide out of the limit groove 14, and the restriction of the inner steel pipe 1 is released. When the inner steel pipe 1 is slid out of the outer steel pipe 2, the inner steel pipe 1 or the outer steel pipe 2 can be replaced, thereby improving the replacement efficiency.

[0020] like Figure 4 As shown, a plurality of fixing ears 16 are fixedly connected to the other side of the inner wall of the rotating ring 13, and a plurality of fixing ears 10 are fixedly connected to the other side of the inner wall of the outer steel pipe 2 and near the edge. A fixing bolt 11 is threadedly connected to one side of the plurality of fixing ears 10, and the outer walls of the plurality of fixing bolts 11 are respectively threadedly connected to the inner walls of the plurality of fixing ears 16. The fixing bolt 11 is used to fix the fixing ears 10 and the fixing ears 16 to prevent the inner steel pipe 1 from sliding in the outer steel pipe 2.

[0021] like Figure 1 - Figure 4 As shown, one end of the inner steel pipe 1 is fixedly connected with a socket 5, and the other end of the inner steel pipe 1 is provided with a slot 9. The outer wall of the socket 5 is clamped with the inner wall of the slot 9, and a flange ring 6 is fixedly connected to the outer wall of the inner steel pipe 1 near the edge. The cooperation between the socket 5 and the slot 9 can reduce air leakage of the two transport steel pipes.

[0022] like Figure 4 As shown, a handle 17 is provided on one side of the L-shaped limit frame 15 , and one side of the handle 17 is fixedly connected to one side of the inner wall of the rotating ring 13 . The handle 17 facilitates the rotating ring 13 to rotate in the rotating slide groove 12 .

[0023] like Figure 1 - Figure 4As shown, the outer surface of the outer steel pipe 2 is coated with an anti-corrosion film 3, the inner wall of the inner steel pipe 1 is coated with a composite high-temperature resistant film 4, and the outer wall of the inner steel pipe 1 is sleeved with thermal insulation cotton 8, wherein the thermal insulation cotton 8 is made of polyurethane foam, and the polyurethane foam has good thermal insulation efficiency, which prevents the temperature between the outer steel pipe 2 and the inner steel pipe 1 from being too low, thereby improving the service life of the steel pipe, wherein the anti-corrosion film 3 is formed by raw lacquer, and has the advantages of acid resistance, solvent resistance, water resistance, oil resistance, wear resistance and strong adhesion, etc., which can prevent the steel pipe from being corroded by rain when exposed to the outdoors.

[0024] The utility model provides a high temperature resistant stainless steel pipe, and the specific working principle is as follows:

[0025] When replacing the inner steel pipe 1, the staff uses a tool to remove the fixing bolt 11 from the fixing ear 10, thereby releasing the restriction of the rotating ring 13. The staff rotates the rotating ring 13 through the handle 17 to make the rotating ring 13 rotate in the rotating slide groove 12, wherein the L-shaped limit frame 15 will rotate with the rotating ring 13 until the L-shaped limit frame 15 slides out of the limit groove 14, thereby contacting the restriction of the inner steel pipe 1, and then the inner steel pipe 1 is pulled out from the outer steel pipe 2 to replace the inner steel pipe 1. When replacing the new inner steel pipe 1, the above steps are reversed.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant stainless steel pipe, comprising an inner steel pipe (1), characterized in that: The outer wall of the inner steel tube (1) is provided with a plurality of fixing frames (7), and one side of each of the fixing frames (7) is provided with a limiting groove (14). The outer wall of the inner steel tube (1) is provided with an outer steel tube (2), and one side of the inner wall of the outer steel tube (2) is provided with a plurality of sliding grooves (18). The inner walls of the plurality of sliding grooves (18) are respectively slidably connected to one end of the plurality of fixing frames (7). The other side of the inner wall of the outer steel tube (2) is provided with two rotating grooves (12), and the inner walls of the two rotating grooves (12) are slidably connected to a rotating ring (13). One side of the inner walls of the two rotating rings (13) is fixedly connected with a plurality of L-shaped limiting frames (15), and the outer walls of the plurality of L-shaped limiting frames (15) are slidably connected to the inner walls of the plurality of limiting grooves (14).

2. A high temperature resistant stainless steel pipe according to claim 1, characterized in that: A plurality of fixing ears (16) are fixedly connected to the other side of the inner wall of the rotating ring (13), and a plurality of fixing ears (10) are fixedly connected to the other side of the inner wall of the outer steel tube (2) and near the edge, and a fixing bolt (11) is threadedly connected to one side of the plurality of fixing ears (10), and the outer side walls of the plurality of fixing bolts (11) are respectively threadedly connected to the inner walls of the plurality of fixing ears (16).

3. The high temperature resistant stainless steel pipe according to claim 1, characterized in that: One end of the inner steel pipe (1) is fixedly connected to a socket (5), and the other end of the inner steel pipe (1) is provided with a slot (9). The outer wall of the socket (5) is snap-fitted to the inner wall of the slot (9), and a flange ring (6) is fixedly connected to the outer wall of the inner steel pipe (1) near the edge.

4. The high temperature resistant stainless steel pipe according to claim 1, characterized in that: A handle (17) is provided on one side of the L-shaped limiting frame (15), and one side of the handle (17) is fixedly connected to one side of the inner wall of the rotating ring (13).

5. The high temperature resistant stainless steel pipe according to claim 1, characterized in that: The outer surface of the outer steel pipe (2) is coated with an anti-corrosion film (3), the inner wall of the inner steel pipe (1) is coated with a composite high-temperature resistant film (4), and the outer wall of the inner steel pipe (1) is sleeved with thermal insulation cotton (8).

Images