High-strength low-temperature-resistant composite stainless steel pipe

Abstract

The utility model discloses a high-strength low-temperature-resistant composite stainless steel pipe which comprises a first pipe body and a second pipe body which are connected through a connector, the first pipe body and the second pipe body each comprise an inner pipe and an outer pipe, plugs are arranged between the two ends of the inner pipe and the two ends of the outer pipe respectively, the space between the inner pipe and the outer pipe is vacuum, and a plurality of supporting rings are further arranged between the inner pipe and the outer pipe. A plurality of grooves are arrayed in the inner periphery and the outer periphery of the supporting ring respectively, thickening parts are arranged at the two ends of the outer pipe respectively, a vacuumizing connector is arranged at the inner end of one of the two thickening parts, the plug comprises a ring body and a screw joint end, the plug seals the end of the inner pipe and the end of the outer pipe and limits the inner pipe and the outer pipe, and the connector is connected between the thickening parts of the first pipe body and the second pipe body. After the two pipe bodies are connected, the joint of the two pipe bodies is reliable, and the strength of the two pipe bodies is guaranteed.

Description

Technical Field

[0001] This utility model relates to a high-strength, low-temperature resistant composite stainless steel pipe. Background Technology

[0002] The patent with publication number CN222351658U discloses a high-strength stainless steel tube, which includes a first steel tube layer, a vacuum layer, a carbon fiber layer and a second steel tube layer arranged sequentially from the inside to the outside. The ends of the first steel tube layer and the ends of the second steel tube layer are sealed to form a vacuum layer.

[0003] The steel pipe with the above structure has good thermal insulation performance due to the vacuum layer between the first and second steel pipe layers, making it suitable for transporting low-temperature media. However, the steel pipe with the above structure also has the following shortcomings: due to the long length of the steel pipe, the interlayer between the two steel pipe layers can easily lead to a significant reduction in the strength of the steel pipe, making it prone to deformation; when two steel pipes are connected, the connection point of the steel pipe with the above structure is also obviously weak and unreliable, and it is also difficult to set up a sealing structure. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a high-strength, low-temperature resistant composite stainless steel pipe. After the two pipes are connected, the connection is reliable and the strength of the two pipes is guaranteed.

[0005] The technical solution of this utility model is: a high-strength low-temperature resistant composite stainless steel pipe, including a first pipe body and a second pipe body connected by a joint. The first pipe body and the second pipe body each include an inner pipe and an outer pipe. A plug is provided between the two ends of the inner pipe and the outer pipe. The space between the inner pipe and the outer pipe is a vacuum. Multiple support rings are also provided between the inner pipe and the outer pipe. Multiple grooves are arrayed on the inner and outer circumferences of the support rings.

[0006] The outer tube has thickened portions at both ends, and one of the thickened portions has a vacuum connector on its inner end.

[0007] The plug includes a ring body and a threaded end. The end of the inner tube has an external thread, and the end of the thickened part has a corresponding limiting groove of the ring body. The threaded end is inserted between the ends of the outer tube and the inner tube and is threaded to the inner tube. The outer side of the ring body matches the limiting groove, the inner side of the ring body abuts against the end of the inner tube, and the inner circumference of the ring body is flush with the inner circumference of the inner tube.

[0008] The connector is connected between the thickened portions of the first and second pipe bodies.

[0009] Furthermore, the connection points between the ring body and the inner and outer tubes are respectively provided with a first seal and a second seal.

[0010] Furthermore, after the first and second pipe bodies are connected, a third seal is provided between the two abutting ring bodies.

[0011] Furthermore, after the first and second pipe bodies are connected, a fourth seal is provided between the thickened parts that abut against each other.

[0012] Furthermore, the outer end of the ring body also has a mounting groove corresponding to the third seal, and the end of the thickened portion also has a step corresponding to the fourth seal.

[0013] Specifically, the support ring is a columnar support ring.

[0014] Furthermore, a polyurethane layer is also provided on the outer wall of the support ring.

[0015] Furthermore, the two ends of the connector are respectively provided with internal threads, and the thickened portions of the first and second pipe bodies are respectively provided with external threads. The thickened portions are also provided with limiting rings, and the connector is screwed to the first and second pipe bodies.

[0016] Furthermore, the thickened part is provided with a corresponding connection hole for the vacuum connector, the vacuum connector is screwed onto the connection hole, the vacuum connector is also provided with multiple sealing rings, and the vacuum connector is also provided with a one-way valve.

[0017] Furthermore, the connector, the first tube body, and the second tube body are also provided with a heat insulation layer.

[0018] The beneficial effects of this utility model are as follows: In this utility model, the strength of the connection between the first tube and the second tube is guaranteed. The multiple support rings set between the inner and outer tubes of the first and second tubes increase the strength of the entire tube. Since the inner and outer circumferences of the support rings are arrayed with multiple grooves, the air between the inner and outer tubes can be smoothly extracted during vacuuming. When the support rings are inserted, the multiple support rings are pushed in one by one, and then plugs are set at both ends of the inner and outer tubes for easy assembly. The vacuum state between the inner and outer tubes is also conducive to the heat preservation of the low-temperature medium transported by the inner tube. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention;

[0020] Figure 2 yes Figure 1 Enlarged view of section A;

[0021] Figure 3 This is a schematic diagram of the top or bottom structure of the support ring in this utility model;

[0022] Figure 4 This is a schematic diagram of the side structure of the support ring in this utility model.

[0023] In the diagram: Inner tube 1, Outer tube 2, Plug 3, Support ring 4, Groove 5, Thickened part 6, Vacuum connector 7, Ring body 8, Threaded end 9, Connector 10, First seal 11, Second seal 12, Third seal 13, Fourth seal 14. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0025] Combination Figure 1-3 As shown, the high-strength low-temperature resistant composite stainless steel pipe includes a first pipe body and a second pipe body connected by a joint 10. Both the first pipe body and the second pipe body include an inner pipe 1 and an outer pipe 2.

[0026] The inner tube 1 and the outer tube 2 are respectively provided with plugs 3 at both ends. The space between the inner tube 1 and the outer tube 2 is a vacuum. Multiple support rings 4 are also provided between the inner tube 1 and the outer tube 2. Multiple grooves 5 are arrayed on the inner and outer circumferences of the support rings 4 to facilitate the passage of air between the inner tube 1 and the outer tube 2 when the vacuum is drawn.

[0027] The outer tube 2 has thickened portions 6 at both ends, and one of the thickened portions 6 has a vacuum connector 7 on its inner end.

[0028] The plug 3 includes a ring body 8 and a screw end 9. The end of the inner tube 1 has an external thread, and the end of the thickened part 6 has a limiting groove corresponding to the ring body 8. The screw end 9 is inserted between the ends of the outer tube 2 and the inner tube 1 and screwed into the inner tube 1. The outer side of the ring body 8 matches the limiting groove, the inner side of the ring body 8 abuts against the end of the inner tube 1, and the inner circumference of the ring body 8 is flush with the inner circumference of the inner tube 1.

[0029] The connector 10 is connected between the thickened portion 6 of the first and second pipe bodies to ensure the reliability of the connection between the two pipe bodies.

[0030] In the above structure, the connection between the first tube and the second tube is strong. The multiple support rings 4 set between the inner tube 1 and the outer tube 2 of the first tube and the second tube increase the strength of the entire tube. Since the inner and outer circumferences of the support rings 4 are arrayed with multiple grooves 5, the air between the inner tube 1 and the outer tube 2 can be smoothly extracted when vacuuming. When the support rings 4 are inserted, the multiple support rings 4 are pushed in one by one, and then plugs 3 are set at both ends of the inner tube 1 and the outer tube 2 to facilitate assembly. The vacuum state between the inner tube 1 and the outer tube 2 is also conducive to the heat preservation of the low temperature medium transported by the inner tube 1.

[0031] In another embodiment, combined Figure 1 and Figure 2 As shown, the connection between the ring body 8 and the inner tube 1 and the outer tube 2 is also provided with a first seal 11 and a second seal 12 respectively.

[0032] In another embodiment, combined Figure 1 and Figure 2 As shown, after the first tube and the second tube are connected, a third seal 13 is provided between the two abutting rings 8.

[0033] In another embodiment, combined Figure 1 and Figure 2 As shown, after the first tube and the second tube are connected, a fourth seal 14 is provided between the two abutting thickened parts 6.

[0034] Specifically, the first seal 11, the second seal 12, the third seal 13 and the fourth seal 14 are all graphite seals.

[0035] In the above structure, the first seal 11, the second seal 12, the third seal 13 and the fourth seal 14 can ensure the sealing of the connection between the first pipe body and the second pipe body and avoid leakage.

[0036] In another embodiment, combining 1 and Figure 2 As shown, the outer end of the ring body 8 also has a mounting groove corresponding to the third seal 13, and the end of the thickened part 6 also has a step corresponding to the fourth seal 14.

[0037] In another embodiment, combined Figure 3 and Figure 4 As shown, the support ring 4 is a columnar support ring to prevent the support ring 4 from tilting during the process of pushing the inner tube 1 and the outer tube 2 together, thus failing to achieve the support effect.

[0038] In another embodiment, a polyurethane layer is also provided on the outer wall of the support ring 4, giving it a certain elasticity. This facilitates the insertion of the support ring 4 between the inner tube 1 and the outer tube 2, and also reduces thermal conductivity.

[0039] In another embodiment, such as Figure 1 As shown, the two ends of the connector 10 are respectively provided with internal threads, and the thickened portions 6 of the first and second pipe bodies are respectively provided with external threads. The thickened portions 6 are also provided with limiting rings. The connector 10 is screwed to the first and second pipe bodies to facilitate the connection between the first and second pipe bodies.

[0040] In another embodiment, the thickened part 6 is provided with a connection hole corresponding to the vacuum connector 7, the vacuum connector 7 is screwed onto the connection hole, the vacuum connector 7 is also provided with multiple sealing rings, and the vacuum connector 7 is also provided with a one-way valve to prevent outside air from entering between the inner tube 1 and the outer tube 2.

[0041] In another embodiment, the connector 10, the first tube body, and the second tube body are further provided with a heat insulation layer.

Claims

1. A high-strength, low-temperature resistant composite stainless steel pipe, comprising a first pipe body and a second pipe body connected by a joint (10), wherein both the first pipe body and the second pipe body comprise an inner pipe (1) and an outer pipe (2), characterized in that, The inner tube (1) and the outer tube (2) are respectively provided with plugs (3) between their ends. The space between the inner tube (1) and the outer tube (2) is a vacuum. The inner tube (1) and the outer tube (2) are also provided with multiple support rings (4). The inner and outer circumferences of the support rings (4) are respectively arrayed with multiple grooves (5). The outer tube (2) has thickened portions (6) at both ends, and one of the two thickened portions (6) has a vacuum connector (7) on its inner end; The plug (3) includes a ring body (8) and a screw end (9). The end of the inner tube (1) has an external thread, and the end of the thickened part (6) has a limiting groove corresponding to the ring body (8). The screw end (9) is inserted between the ends of the outer tube (2) and the inner tube (1) and screwed to the inner tube (1). The outer side of the ring body (8) matches the limiting groove, and the inner side of the ring body (8) abuts against the end of the inner tube (1). The inner circumference of the ring body (8) is flush with the inner circumference of the inner tube (1). The connector (10) is connected between the thickened portion (6) of the first tube and the second tube.

2. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 1, characterized in that, The connection between the ring (8) and the inner tube (1) and the outer tube (2) is provided with a first seal (11) and a second seal (12), respectively.

3. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 2, characterized in that, After the first and second pipes are connected, a third seal (13) is provided between the two abutting rings (8).

4. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 3, characterized in that, After the first tube and the second tube are connected, a fourth seal (14) is provided between the two abutting thickened parts (6).

5. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 4, characterized in that, The outer end of the ring (8) also has a mounting groove corresponding to the third seal (13), and the end of the thickened part (6) also has a step corresponding to the fourth seal (14).

6. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 5, characterized in that, The support ring (4) is a columnar support ring.

7. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 6, characterized in that, The outer wall of the support ring (4) is also provided with a polyurethane layer.

8. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 7, characterized in that, The two ends of the connector (10) are respectively provided with internal threads, and the thickened part (6) of the first tube and the second tube are respectively provided with external threads. The thickened part (6) is also provided with a limiting ring. The connector (10) is screwed to the first tube and the second tube.

9. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 8, characterized in that, The thickened part (6) is provided with a connection hole corresponding to the vacuum connector (7), the vacuum connector (7) is screwed onto the connection hole, the vacuum connector (7) is also provided with multiple sealing rings, and the vacuum connector (7) is also provided with a one-way valve.

10. The high-strength, low-temperature resistant composite stainless steel pipe as described in claim 9, characterized in that, The connector (10), the first tube, and the second tube are also provided with a heat insulation layer.

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