A new type of titanium steel composite pipe

Abstract

The utility model discloses a novel titanium-steel composite pipe, specifically relates to the field of composite pipes, including a first connecting pipe, wherein a connecting mechanism is provided on one side of the first connecting pipe; and the connecting mechanism includes a fixing ring provided on one side of the first connecting pipe, wherein a clamping ring is provided inside the fixing ring, and fixing rods are provided on both sides of the clamping ring. The utility model aligns the two ends of the first connecting pipe and the second connecting pipe by providing a connecting mechanism, then the titanium tube layer is fixedly connected by welding, and then the fixing ring is sleeved on the outside of the titanium tube layer and fixed by welding, then the clamping ring in the fixing ring is sleeved on the outside of the connecting ring, and then the fixing rod is inserted into the movable groove for docking, and after the docking is completed, the above structure is directly fixed by welding to achieve the effect of improving the welding strength and welding reliability, and the support sheets located on the outside of the titanium tube layer are spliced ​​to form a ring, thereby further helping to improve the welding strength.

Description

Technical Field

[0001] The utility model relates to the technical field of composite pipes, and more specifically, to a novel titanium-steel composite pipe. Background Art

[0002] Titanium has good physical, chemical and mechanical properties. Combining titanium with other metals (such as steel, copper, aluminum, etc.) to make metal composite materials can not only give full play to the excellent properties of titanium, but also greatly reduce costs. Therefore, there have been many studies on similar materials in recent years. Among them, titanium-steel composite materials are widely used in chemical, petroleum and other industrial sectors due to their high strength, excellent corrosion resistance and significant economic benefits.

[0003] Patent application publication number: CN214111730U titanium-steel composite pipe, by adding a transition foil between the steel base pipe and the titanium base pipe, and connecting the titanium base pipe and the steel base pipe by interference fit, so that the transition foil is diffused between the steel base pipe and the titanium base pipe through the dual effects of pressure and temperature, and a new interface is formed. The strength of this interface is as high as 600 MPa. The titanium-steel composite pipe that reaches this strength can be used in an environment subjected to high pressure, high temperature and high impact load, thereby improving the interface strength of the titanium-steel composite pipe and meeting the use requirements of complex environments.

[0004] However, when the structure is actually used, since titanium and iron are easily formed into intermetallic brittle compounds during welding, it eventually leads to the formation of brittle joints at the weld, thus affecting the use of titanium-steel composite pipes. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides a new titanium-steel composite pipe to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel titanium-steel composite pipe comprises a first connecting pipe, one side of which is provided with a connecting mechanism;

[0008] The connecting mechanism includes a fixing ring arranged on one side of a first connecting tube, a clamping ring is arranged inside the fixing ring, fixing rods are arranged on both sides of the clamping ring, a connecting ring is arranged on one side of the fixing rod, a movable groove is opened on the surface of the connecting ring, the movable groove is movably clamped with the fixing rod, the clamping ring is movably sleeved with the connecting ring, and a second connecting tube is arranged on one side of the movable groove.

[0009] By adopting the above technical solution: in order to prevent the formation of brittle joints at the welding position, thereby affecting the use of titanium steel composite pipes.

[0010] As a further description of the above technical solution: a steel tube layer is provided on one side of the first connecting tube and the second connecting tube, a titanium tube layer is provided inside the steel tube layer, the length of the titanium tube layer is greater than the length of the steel tube layer, support plates are provided inside the first connecting tube and the second connecting tube, a transition foil is provided between the steel base tube and the titanium base tube, and the transition foil is welded to the outer wall of the steel base tube.

[0011] By adopting the above technical solution: the support sheets are spliced ​​together to form a ring, thereby further helping to improve the welding strength.

[0012] As a further description of the above technical solution: a fixing rod is provided inside the first connecting tube and the second connecting tube, a titanium-based tube is movably sleeved on the surface of the fixing rod, a steel-based tube is sleeved on the surface of the titanium-based tube, a blocking block is fixedly provided on one side of the steel-based tube, an air intake pipe and an air exhaust pipe are provided inside the blocking block, one side of the blocking block is fixedly connected to the air intake pipe, and the other side of the blocking block is fixedly connected to the air exhaust pipe.

[0013] By adopting the above technical solution: in order to increase the service life of the titanium-steel composite pipe.

[0014] As a further description of the above technical solution: one side of the exhaust pipe is connected to a vacuum pump, one side of the air inlet pipe is connected to an argon tank, and the fixing ring is configured as a honeycomb structure.

[0015] By adopting the above technical solution, the outer surface and the inner surface of the fixing ring are interconnected through the honeycomb structure, thereby facilitating connection.

[0016] Technical effects and advantages of the utility model:

[0017] 1. By setting a connection mechanism, compared with the prior art, the first connecting tube and the second connecting tube are aligned at both ends, and after the titanium tube layer is fixedly connected by welding, the above structure is directly fixed by welding after the butt joint is completed, which can achieve the effect of improving the welding strength and welding reliability. The support sheets located on the outside of the titanium tube layer are spliced ​​together to form a ring, thereby further helping to improve the welding strength and prevent the formation of brittle joints at the welding point, thereby affecting the use of the titanium-steel composite tube;

[0018] 2. By setting fixed rods, titanium-based tubes, steel-based tubes, blocking blocks and exhaust pipes, compared with the prior art, both ends of the steel-based tube and the titanium-based tube are sealed with blocking blocks and argon arc welding is used to ensure good airtightness. The exhaust pipe and the inflation pipe are respectively welded to both sides of the blocking blocks. The welded steel-based tube and the titanium-based tube are evacuated by a vacuum pump group system, filled with argon gas, and the rod blank is heated to a preset temperature. The rod blank is transferred to an extruder, and the two ends of the finished rod blank are cut off and the fixed rod is extruded to form a titanium-steel composite tube, in order to increase the service life of the titanium-steel composite tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the connecting mechanism structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the first connecting pipe of the utility model.

[0022] Figure 4 It is a cross-sectional schematic diagram of the fixing ring of the utility model.

[0023] The figures are marked as follows: 1. first connecting pipe; 2. fixing ring; 3. clamping ring; 4. fixing rod; 5. connecting ring; 6. movable groove; 7. second connecting pipe; 8. steel tube layer; 9. titanium tube layer; 10. fixing rod; 11. titanium-based tube; 12. steel-based tube; 13. blocking block; 14. air intake pipe; 15. exhaust pipe. DETAILED DESCRIPTION

[0024] 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.

[0025] The embodiments of this application disclose Figure 1-4A novel titanium-steel composite pipe shown in the figure comprises a first connecting pipe 1, and a connecting mechanism is arranged on one side of the first connecting pipe 1; the connecting mechanism comprises a fixing ring 2 arranged on one side of the first connecting pipe 1, a clamping ring 3 is arranged inside the fixing ring 2, fixing rods 4 are arranged on both sides of the clamping ring 3, a connecting ring 5 is arranged on one side of the fixing rod 4, a movable groove 6 is opened on the surface of the connecting ring 5, the movable groove 6 is movably clamped with the fixing rod 4, the clamping ring 3 is movably sleeved with the connecting ring 5, and a second connecting pipe 7 is arranged on one side of the movable groove 6. The two ends of the first connecting pipe 1 and the second connecting pipe 7 are aligned, and then the titanium tube layer 9 is fixedly connected by welding, and then the fixing ring 2 is sleeved on the outside of the titanium tube layer 9 and fixed by welding, so as to strengthen the fixation.

[0026] Reference Figure 1-3 As shown, a steel tube layer 8 is provided on one side of the first connecting tube 1 and the second connecting tube 7, and a titanium tube layer 9 is provided inside the steel tube layer 8. The length of the titanium tube layer 9 is greater than the length of the steel tube layer 8. Support sheets are provided inside the first connecting tube 1 and the second connecting tube 7. A transition foil is provided between the steel base tube 12 and the titanium base tube 11. The transition foil is welded to the outer wall of the steel base tube 12. The clamping ring 3 in the fixing ring 2 is sleeved on the outside of the connecting ring 5, and then the fixing rod 4 is inserted into the movable groove 6 for docking. After the docking is completed, the above structure is directly fixed by welding to achieve the effect of improving the welding strength and welding reliability. The support sheets located on the outside of the titanium tube layer 9 are spliced ​​with each other to form a ring, thereby further helping to improve the welding strength.

[0027] Reference Figure 2-4 As shown, a fixing rod 10 is provided inside the first connecting tube 1 and the second connecting tube 7. A titanium-based tube 11 is movably sleeved on the surface of the fixing rod 10. A steel-based tube 12 is sleeved on the surface of the titanium-based tube 11. A blocking block 13 is fixedly provided on one side of the steel-based tube 12. An air inlet pipe 14 and an air exhaust pipe 15 are provided inside the blocking block 13. One side of the blocking block 13 is fixedly connected to the air inlet pipe 14, and the other side of the blocking block 13 is fixedly connected to the air exhaust pipe 15. After applying a glass release agent to the fixing rod 10, it is inserted into the inner hole of the steel-based tube 12 to ensure a gap-free fit. Then, both ends of the steel-based tube 12 and the titanium-based tube 11 are sealed with the blocking block 13 and circumferentially welded with argon arc welding to ensure good airtightness. Finally, the air exhaust pipe 15 and the inflation tube are respectively welded to both sides of the blocking block 13. Then, the welded steel-based tube 12 and the titanium-based tube 11 are vacuumed using a vacuum pump group system.

[0028] Reference Figure 3-4As shown, one side of the exhaust pipe 15 is connected to a vacuum pump, one side of the air inlet pipe 14 is connected to an argon tank, and the fixing ring 2 is configured as a honeycomb structure. After the argon gas is filled, the rod blank is heated to a preset temperature, and then the rod blank is transferred to an extruder, and the two ends of the finished rod blank are cut off and the fixing rod 10 is extruded to form a titanium steel composite tube.

[0029] Working principle of the utility model: when the utility model is used, in order to facilitate the installation of the sleeve, first align the two ends of the first connecting tube 1 and the second connecting tube 7, then fix the titanium tube layer 9 by welding, and then sleeve the fixing ring 2 on the outside of the titanium tube layer 9 and fix it by welding. The outer surface and the inner surface of the fixing ring 2 are mutually connected through the honeycomb structure, so the clamping ring 3 in the fixing ring 2 can be sleeved on the outside of the connecting ring 5, and then the fixing rod 4 is inserted into the movable groove 6 for docking. After the docking is completed, the above structure is directly fixed by welding to achieve the effect of improving the welding strength and welding reliability. The support sheets located on the outside of the titanium tube layer 9 are spliced ​​together to form a ring, thereby further helping to improve the welding strength;

[0030] Then, the fixing rod 10 is coated with a glass release agent and inserted into the inner hole of the steel base tube 12 to ensure a gap-free fit. The two ends of the steel base tube 12 and the titanium base tube 11 are then sealed with a block 13 and argon arc welding is used to ensure good air tightness. Finally, the exhaust pipe 15 and the inflation pipe are welded to both sides of the block 13 respectively. Then, the welded steel base tube 12 and the titanium base tube 11 are vacuumed using a vacuum pump group system. Then, the stop valve between the vacuum pump and the parts is opened, and argon gas is filled in. After the argon gas in the tube is balanced, the argon filling valve is closed, and the stop valve between the parts and the vacuum pump is closed to continue vacuuming. After three reciprocating cycles, it is ensured that the inside of the composite tube is in an argon-filled state, thereby improving the interface strength of the titanium-steel composite tube. When the argon gas is filled, the rod blank is heated. After heating to a preset temperature, the rod blank is transferred to an extruder, and the two ends of the finished rod blank are cut off and the fixing rod 10 is extruded in the form of extrusion to form a titanium-steel composite tube.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel titanium-steel composite pipe, comprising a first connecting pipe (1), characterized in that: A connecting mechanism is provided on one side of the first connecting pipe (1); The connection mechanism comprises a fixing ring (2) arranged on one side of a first connection tube (1); a clamping ring (3) is arranged inside the fixing ring (2); fixing rods (4) are arranged on both sides of the clamping ring (3); a connecting ring (5) is arranged on one side of the fixing rod (4); a movable groove (6) is provided on the surface of the connecting ring (5); the movable groove (6) is movably clamped with the fixing rod (4); the clamping ring (3) is movably sleeved with the connecting ring (5); and a second connection tube (7) is arranged on one side of the movable groove (6).

2. A novel titanium-steel composite pipe according to claim 1, characterized in that: A steel tube layer (8) is provided on one side of the first connecting tube (1) and the second connecting tube (7), a titanium tube layer (9) is provided inside the steel tube layer (8), the length of the titanium tube layer (9) is greater than the length of the steel tube layer (8), and a support sheet is provided inside the first connecting tube (1) and the second connecting tube (7).

3. The novel titanium-steel composite pipe according to claim 1 is characterized in that: A fixing rod (10) is provided inside the first connecting tube (1) and the second connecting tube (7), a titanium-based tube (11) is movably sleeved on the surface of the fixing rod (10), and a steel-based tube (12) is sleeved on the surface of the titanium-based tube (11).

4. The novel titanium-steel composite pipe according to claim 3 is characterized in that: A transition foil is provided between the steel-based tube (12) and the titanium-based tube (11), and the transition foil is welded to the outer wall of the steel-based tube (12).

5. The novel titanium-steel composite pipe according to claim 3 is characterized in that: A blocking block (13) is fixedly provided on one side of the steel base pipe (12), an air intake pipe (14) and an air exhaust pipe (15) are provided inside the blocking block (13), one side of the blocking block (13) is fixedly connected to the air intake pipe (14), and the other side of the blocking block (13) is fixedly connected to the air exhaust pipe (15).

6. The novel titanium-steel composite pipe according to claim 5 is characterized in that: One side of the exhaust pipe (15) is connected to a vacuum pump, and one side of the intake pipe (14) is connected to an argon gas tank.

7. The novel titanium-steel composite pipe according to claim 1 is characterized in that: The fixing ring (2) is configured as a honeycomb structure.

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