Low temperature resistant sheathing

Abstract

This utility model relates to the field of low-temperature resistant sheathing technology, and discloses a low-temperature resistant sheathing tube, including a tube body, a nitrogen layer, and an inner column. The tube body has a hollow cavity inside, and an insulating airbag is fixedly connected to the inner wall of the hollow cavity. The outer wall of the nitrogen layer is fixedly connected to the inner wall of the insulating airbag. An outer column is fixedly connected to the inner wall of the tube body, a sponge is fixedly connected to the inner wall of the outer column, and a dehumidifying layer is fixedly connected to the outer wall of the inner column. A passage component is provided on the inner wall of the insulating airbag, and a reinforcing component is provided on the outer wall of the tube body. In this utility model, a hollow cavity is formed in the tube body, and an insulating airbag is placed in the hollow cavity. Nitrogen gas is injected into the insulating airbag through an inflation port. The interior of the insulating airbag is filled with chambers and air channels. Both the outer and inner columns are equipped with sponges and supplemented with a dehumidifying layer. The entire structure achieves efficient heat preservation and drying effects inside the tube body, providing a stable temperature environment for internal pipelines and cables.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature resistant sheathing technology, and in particular to low-temperature resistant sheathing. Background Technology

[0002] Cable conduits are flexible protective materials wrapped around the outer layer of cable conduits. Made of rubber and plastic, they are wear-resistant, insulating, and anti-aging. Used in industrial machinery and automotive fields, their structure can disperse external impacts and reduce equipment wear. Ordinary cable conduits become brittle and crack in cold environments, but low-temperature resistant cable conduits are enhanced with special formula materials to improve their freeze resistance. They maintain their flexibility even at tens of degrees below zero Celsius, making them suitable for the protection of wiring inside outdoor equipment and cold storage facilities in frigid northern regions, ensuring stable and safe power transmission under extreme temperatures.

[0003] Traditional low-temperature resistant sheathing tubes operate based on a multi-layered structural design. They form an external protection through a metal shell, while the interior is filled with insulating material to reduce heat loss. At the same time, a reflective layer blocks heat radiation. In low-temperature environments, they slow down the conduction of external cold through physical isolation, maintaining a stable internal temperature. However, their drawbacks are quite obvious. The material becomes brittle at extreme low temperatures, leading to a decrease in protective performance. The sealing structure is affected by thermal expansion and contraction, resulting in gaps. External moisture can intrude and form ice, further damaging the insulation effect. The frequency and cost of equipment maintenance increase significantly.

[0004] Existing cryogenic sheathing tubes use high-molecular composite materials as the main body, combined with vacuum layer technology to weaken the thermal convection effect, and improve low-temperature toughness by optimizing the material molecular structure. At the same time, an anti-condensation coating is added to the surface of the sheathing tube to reduce the risk of icing. However, in actual use, the above devices have poor thermal insulation performance. The vacuum layer can fail due to external pressure or material aging, resulting in a decrease in the overall thermal insulation effect. In addition, the complex structural design increases the difficulty of production and maintenance, and the equipment cost remains high. Therefore, cryogenic sheathing tubes are proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a low-temperature resistant sheath tube, which aims to improve the problem in the prior art where the vacuum layer fails due to external pressure or material aging, resulting in a decrease in the overall heat insulation effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a low-temperature resistant sheath tube, comprising a tube body and an inner column, wherein a hollow cavity is formed inside the tube body, an insulating airbag is fixedly connected to the inner wall of the hollow cavity, the outer wall of the nitrogen layer is fixedly connected to the inner wall of the insulating airbag, an outer column is fixedly connected to the inner wall of the tube body, a sponge is fixedly connected to the inner wall of the outer column, a dehumidifying layer is fixedly connected to the outer wall of the inner column, a passage component is provided on the inner wall of the insulating airbag, a reinforcing component is provided on the outer wall of the tube body, an inflation component is provided on the inner wall of the hollow cavity, and a sealing mechanism is provided on the outer wall of the tube body, the sealing mechanism being used to improve the sealing degree of the tube body connection.

[0007] As a further description of the above technical solution:

[0008] The sealing mechanism includes a locking joint, the outer wall of which is fixedly connected to the outer wall of the tube body, and multiple toothed locking elements are fixedly connected to the outer wall of the locking joint. The inner wall of the tube body has multiple locking grooves, and the tube body has a sealing groove.

[0009] As a further description of the above technical solution:

[0010] The sealing mechanism also includes a sealing ring, and the outer wall of the locking joint is fixedly connected to the sealing ring.

[0011] As a further description of the above technical solution:

[0012] The passage component includes multiple air passages, the outer walls of which are fixedly connected to the inner wall of the heat-insulating airbag, and the heat-insulating airbag has multiple chambers inside.

[0013] As a further description of the above technical solution:

[0014] The reinforcement component includes multiple reinforcement rings, which are fixedly connected to the outer wall of the pipe body.

[0015] As a further description of the above technical solution:

[0016] The inflation assembly includes an air column, one end of which is fixedly connected to the outer wall of the heat-insulating airbag, and the other end of which is fixedly connected to an inflation port. A rotating shaft is fixedly connected to the outer wall of the inflation port, and a sealing cap is rotatably connected to the outer wall of the rotating shaft.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the pipe is fixedly connected to a first clamp, the outer wall of the first clamp is rotatably connected to a connector, and the outer wall of the connector is rotatably connected to a second clamp.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the first clamp is threaded with a screw rod, and the outer wall of the screw rod is threaded with a knob.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a hollow cavity is provided in the tube body, and a heat-insulating air bag is provided in the hollow cavity. Nitrogen gas is injected into the heat-insulating air bag through the air column via the air inlet. The heat-insulating air bag is filled with chambers and air channels. In addition, sponges are provided on the outer column and the inner column, and a dehumidifying layer is provided. The entire structure achieves efficient heat preservation and drying effect inside the tube body, providing a stable temperature environment for internal pipelines and cables.

[0023] 2. In this utility model, when multiple pipes need to be connected, it is only necessary to connect the snap-fit ​​joint to the other end of the pipe. The snap-fit ​​joint is equipped with a toothed snap-fit ​​part, which is designed in a slope shape and made of rubber material, making it easy to connect and preventing it from falling off. Furthermore, the toothed snap-fit ​​part cooperates with the snap-fit ​​groove to ensure a certain deformation capacity during engagement and to maintain structural strength. The sealing ring and the sealing groove work together to achieve a long-term sealing effect. Attached Figure Description

[0024] Figure 1 This is a perspective view of the low-temperature resistant sheath tube proposed in this utility model;

[0025] Figure 2 This is a front view of the low-temperature resistant sheath tube proposed in this utility model;

[0026] Figure 3 This is a cross-sectional view of the heat-insulating air bladder of the low-temperature resistant sheath tube proposed in this utility model.

[0027] Figure 4 This is a cross-sectional view of the reinforcing ring of the low-temperature resistant sheath tube proposed in this utility model;

[0028] Figure 5 This is a cross-sectional view of the tube body of the low-temperature resistant sheath tube proposed in this utility model.

[0029] Legend:

[0030] 1. Tube body; 2. Sealing mechanism; 201. Toothed engaging component; 202. Sealing ring; 203. Engaging joint; 204. Sealing groove; 205. Engaging groove; 3. Hollow cavity; 4. Insulating airbag; 5. Nitrogen layer; 6. Chamber; 7. Air passage; 8. Sponge; 9. Dehumidifying layer; 10. Inner column; 11. Outer column; 12. Reinforcing ring; 13. First clamp; 14. Second clamp; 15. Connector; 16. Screw; 17. Knob; 18. Air column; 19. Inflation port; 20. Rotating shaft; 21. Sealing cover. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 5 This utility model provides an embodiment of a low-temperature resistant sheath tube, comprising a tube body 1, a nitrogen layer 5, and an inner column 10. The tube body 1 protects internal pipelines or cables in low-temperature environments, preventing material embrittlement and cracking, while also isolating moisture, preventing corrosion and mechanical damage, and ensuring stable system operation. The tube body 1 has a hollow cavity 3 with a vacuum design for housing insulation components. An insulation airbag 4 is fixedly connected to the inner wall of the hollow cavity 3, employing a honeycomb structure and filled with a low thermal conductivity gas for insulation. The outer wall of the nitrogen layer 5 is fixedly connected to the insulation airbag. The inner wall of the inner column 10 extends the heat conduction path, slows down heat loss, and provides a stable temperature environment for internal pipelines and cables. An outer column 11 is fixedly connected to the inner wall of the inner column 1, serving as the outer wall support structure. A sponge 8 is fixedly connected to the inner wall of the outer column 11. A dehumidifying layer 9 is fixedly connected to the outer wall of the inner column 10, which prevents internal icing, corrosion, and degradation of insulation performance by adsorbing or blocking moisture. The inner column 10 serves as the outer wall support structure of the inner column 1. The inner wall of the heat-insulating airbag 4 is provided with a passage assembly, which includes multiple air channels 7. The outer wall is fixedly connected to the inner wall of the heat-insulating airbag 4. The heat-insulating airbag 4 has multiple chambers 6 inside, which are insulated from the external low temperature by filling the internal gas layer. The outer wall of the tube body 1 is provided with a reinforcing component, which includes multiple reinforcing rings 12. By enhancing the structural strength and dispersing external pressure, it prevents the tube body 1 from deforming or cracking, and ensures long-term stable protection of the pipeline or cable under mechanical stress or environmental impact. The multiple reinforcing rings 12 are fixedly connected to the inner wall of the hollow cavity 3 of the outer wall of the tube body 1. An inflation component is provided, which includes an air column 18, which is filled with nitrogen. The channel for the insulated airbag 4 has an air column 18, one end of which is fixedly connected to the outer wall of the insulated airbag 4, and the other end of which is fixedly connected to an inflation port 19. The inflation port 19 is the inlet for nitrogen to be filled. A rotating shaft 20 is fixedly connected to the outer wall of the inflation port 19. A sealing cover 21 is rotatably connected to the outer wall of the rotating shaft 20. The rotating shaft 20 is used to control the opening and closing of the sealing cover 21. The sealing cover 21 maintains the airtightness of the insulated airbag 4 and ensures the stability of its internal heat preservation performance. A sealing mechanism 2 is provided on the outer wall of the tube body 1. The sealing mechanism 2 is used to improve the sealing degree of the tube body 1 connection.

[0033] Specifically, the pipe body 1 provides protection for internal pipelines or cables in low-temperature environments, preventing material embrittlement and cracking, isolating external moisture from intrusion, avoiding corrosion, and resisting mechanical damage to ensure stable system operation in complex environments. The pipe body 1 has an internal hollow cavity 3 with a vacuum structure specifically designed to house the insulation components. Insulation airbags 4 are fixedly installed on the inner wall of the hollow cavity 3. These airbags have a honeycomb mesh structure and are filled with a low thermal conductivity gas to form a highly efficient thermal insulation barrier. A nitrogen layer 5 is tightly fitted to the insulation. The inner wall of the airbag 4 significantly slows down heat loss by extending the heat conduction path, creating a constant temperature environment for pipelines and cables. An outer column 11 serves as an external support structure on the inner wall of the pipe body 1. A sponge 8 is fixedly connected to the inner wall of the outer column 11 for cushioning and shock absorption. A dehumidifying layer 9 is integrated into the outer wall of the inner column 10. This layer effectively controls moisture penetration through a dual mechanism of active adsorption and physical barrier, preventing internal icing and avoiding insulation degradation and corrosion of metal components. The inner wall of the heat-insulating airbag 4 is equipped with a passageway assembly, which includes multiple air channels 7. The outer wall of the pipe 7 is rigidly connected to the inner wall of the heat-insulating airbag 4. The heat-insulating airbag 4 is divided into multiple independent chambers 6. Each chamber 6 forms a heat insulation layer by filling it with a specific gas, blocking the influence of external low temperature on the internal environment. The outer wall of the pipe body 1 is equipped with a reinforcement component, which consists of multiple sets of reinforcement rings 12. By improving the overall structural strength and dispersing external load pressure, it prevents the pipe body 1 from deforming and cracking due to mechanical stress or environmental impact, ensuring that the pipeline and cables are in a reliable protection state for a long time. The reinforcement rings 12 are evenly distributed on the outer wall of the pipe body 1, and the inner wall of the hollow cavity 3 is integrated with... The inflation assembly includes an air column 18 as a nitrogen delivery channel. One end of the air column 18 is fixedly connected to the outer wall of the heat-insulating airbag 4, and the other end extends to the inflation port 19 to form a gas injection port. The outer wall of the inflation port 19 is equipped with a rotating shaft 20. The rotating shaft 20 controls the opening and closing of the sealing cover 21 through rotation. When the sealing cover 21 is closed, it maintains the airtightness inside the heat-insulating airbag 4, ensuring the long-term stability of the heat insulation performance. A sealing mechanism 2 is set at the outer end of the tube body 1. This mechanism significantly improves the sealing effect at the connection of the tube body 1 by optimizing the sealing structure of the connection part.

[0034] Reference Figure 1 and Figure 4The sealing mechanism 2 includes a snap-fit ​​joint 203 for connecting multiple tubes 1. The outer wall of the snap-fit ​​joint 203 is fixedly connected to the outer wall of the tube 1. Multiple toothed snap-fit ​​pieces 201 are fixedly connected to the outer wall of the snap-fit ​​joint 203. The toothed structure is trapezoidal, which facilitates interlocking and can evenly distribute pressure when subjected to force. The rear side of the toothed structure is sloping, which not only ensures easy interlocking but also provides greater resistance to separation after interlocking. Multiple snap-fit ​​grooves 205 are provided on the inner wall of the tube 1 to cooperate with the toothed snap-fit ​​pieces 201. The tube 1 is provided with a sealing groove 204. The sealing mechanism 2 also includes a sealing ring 202. The outer wall of the snap-fit ​​joint 203 is fixedly connected to the sealing ring 202. The sealing ring 202 cooperates with the toothed snap-fit ​​pieces 201 to prevent the inside of the tube 1 from reacting with the external medium, thus ensuring a long-term sealing effect.

[0035] Specifically, the sealing mechanism 2 includes a locking joint 203, which is used to achieve a stable connection between multiple tubes 1. The outer wall of the locking joint 203 is rigidly fixed to the outer wall of the tube 1. The outer wall of the locking joint 203 integrates multiple toothed locking elements 201. Its trapezoidal toothed structure design has both biting guidance function and pressure dispersion characteristics. The slope shape on the rear side of the tooth reduces assembly resistance during biting and forms a self-locking effect after engagement, effectively resisting the tendency of external force separation. Multiple sets of locking grooves 205 are machined on the inner wall of the tube 1, and their positions correspond precisely to the toothed locking elements 201 to ensure uniform pressure transmission during biting. A sealing groove 204 is opened in the connection area of ​​the tube 1. The sealing mechanism 2 also includes a sealing ring 202, which is fixed to the outer wall of the locking joint 203 and works in conjunction with the toothed locking elements 201. It fills the assembly gap through physical compression, blocks the infiltration channel of external media, maintains the complete isolation between the internal environment of the tube 1 and the outside world, and ensures the reliability of sealing performance during long-term operation.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The outer wall of the pipe body 1 is fixedly connected to a first clamp 13, the outer wall of the first clamp 13 is rotatably connected to a connector 15, and the outer wall of the connector 15 is rotatably connected to a second clamp 14. The first clamp 13 and the second clamp 14 form a closed fixation by wrapping the pipe. The connector 15 realizes the hinge opening and closing of the first clamp 13 and the second clamp 14. The inner wall of the first clamp 13 is threadedly connected to a screw 16, which provides axial fastening force and prevents loosening. The outer wall of the screw 16 is threadedly connected to a knob 17. By rotating the knob 16, the tightness of the screw 16 is adjusted to ensure the stable clamping and sealing of the pipe body 1 by the first clamp 13 and the second clamp 14.

[0037] Specifically, the outer wall of the pipe body 1 is rigidly fixed with a first clamp 13. The outer wall of this clamp is movably connected to a connector 15 via a hinge mechanism. The other end of the connector 15 is rotated with a second clamp 14 via a rotating shaft 20. The first clamp 13 and the second clamp 14 form a closed-loop locking structure by encircling the pipe through a semi-circular structure. The connector 15 acts as a hinge assembly to support the opening and closing movement of the two clamps, enabling convenient installation and disassembly of the pipe body 1. The inner wall of the first clamp 13 is provided with a threaded hole, forming a helical pair connection with the screw 16. The screw 16 generates axial preload during screwing, eliminating assembly gaps and suppressing structural loosening caused by vibration. The outer wall of the end of the screw 16 is threaded and forms a transmission pair with a knob 17. The knob 17 adjusts the screw 16 by rotation. Axial displacement precisely controls the clamping degree of the clamp on the pipe body 1, ensuring that the closed surfaces of the first clamp 13 and the second clamp 14 are tightly fitted, forming a uniformly distributed radial clamping force, effectively preventing the sealing failure caused by media leakage and external impact. The surface of the knob 17 is designed with anti-slip texture to enhance the operating friction and facilitate manual adjustment of the tightness. The hinge point of the connector 15 is made of wear-resistant material to ensure smooth rotation performance after multiple opening and closing. The inner arc surface of the clamp is machined to fit the outer wall contour of the pipe body 1, increasing the contact area to disperse local stress and avoid plastic deformation of the surface of the pipe body 1 due to pressure concentration. The entire clamp assembly is mechanically optimized to achieve high-strength fixation and long-term sealing protection of the connection part of the pipe body 1 while ensuring quick assembly and disassembly.

[0038] Working principle: First, the tube body 1 has a hollow cavity 3 structure inside, which contains a heat-insulating airbag 4. Nitrogen gas is filled into the heat-insulating airbag 4 through the air inlet 19 and the air column 18. The heat-insulating airbag 4 has a network of multiple independent chambers 6 and air channels 7. The chambers 6 block the heat transfer path through the gas isolation layer, while the air channels 7 form a directional airflow circulation to optimize the heat preservation performance. The outer column 11 and the inner column 10 are respectively equipped with sponges 8 and integrated with a dehumidifying layer 9. The dehumidifying layer 9 continuously absorbs internal moisture based on the adsorption principle. The two work together to suppress the risk of icing and maintain the insulation performance. The inner wall of the hollow cavity 3 and the heat-insulating airbag 4. The outer wall is rigidly connected to form a multi-layer composite insulation system. The air inlet 19 forms a gas transmission channel with the air column 18 and the insulation air bag 4. The end of the air column 18 is equipped with a rotatable sealing cap 21 to ensure airtightness after air injection. The reinforcing ring 12 surrounds the outer wall of the tube body 1 in a ring array distribution form. The compressive strength is improved through mechanical distribution design. The geometric arrangement of the chamber 6 and the air channel 7 is thermodynamically optimized, which reduces the heat loss of gas convection and maintains the lightweight characteristics of the structure. The stable residence of nitrogen in the chamber 6 significantly prolongs the heat conduction time gradient. This integrated design enables the tube body 1 to have both high-efficiency heat insulation and dynamic dehumidification functions.

[0039] Furthermore, in scenarios requiring the connection of multiple pipe bodies 1, during operation, it is only necessary to align and assemble the locking joint 203 with the connecting end of another pipe body 1. The toothed locking element 201 installed on the outer wall of the locking joint 203 is made of rubber and designed with a sloping structure. Its flexible nature produces moderate deformation during insertion, which reduces the resistance of assembly operation and enhances the anti-dislodgement performance after engagement through the material's elasticity. The toothed locking element 201 and the locking groove 205 pre-set on the inner wall of the pipe body 1 form a geometric complementary relationship. When subjected to external force, the toothed engagement interface disperses stress through elastic deformation while maintaining the connection structure. The overall rigidity of the joint 203 is such that the sealing ring 202 is fixed to the outer wall of the locking joint 203. The sealing ring 202 is compressed when the locking joint 203 is embedded in the sealing groove 204 of the pipe body 1. The self-adaptive properties of the rubber material are used to fill the assembly gap and block the moisture and gas penetration channels. The trapezoidal slope of the toothed locking part 201 and the chamfered edge of the locking groove 205 form a double sealing barrier. The engagement depth of the toothed structure and the compression amount of the sealing ring 202 are matched and designed to ensure that the mechanical connection strength and air tightness are balanced, and finally achieve a stable sealing effect at the connection part of the pipe body 1 under long-term vibration and temperature difference changes.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cryogenic resistant jacketed pipe comprising a pipe body (1), a nitrogen blanket (5) and an inner column (10), characterized in that: The tube body (1) has a hollow cavity (3) inside. The inner wall of the hollow cavity (3) is fixedly connected to a heat-insulating airbag (4). The outer wall of the nitrogen layer (5) is fixedly connected to the inner wall of the heat-insulating airbag (4). The inner wall of the tube body (1) is fixedly connected to an outer column (11). The inner wall of the outer column (11) is fixedly connected to a sponge (8). The outer wall of the inner column (10) is fixedly connected to a dehumidifying layer (9). The inner wall of the heat-insulating airbag (4) is provided with a passage component. The outer wall of the tube body (1) is provided with a reinforcing component. The inner wall of the hollow cavity (3) is provided with an inflation component. The outer wall of the tube body (1) is provided with a sealing mechanism (2). The sealing mechanism (2) is used to improve the sealing degree of the tube body (1) connection.

2. The low temperature resistant sheath of claim 1, wherein: The sealing mechanism (2) includes a locking joint (203), the outer wall of the locking joint (203) is fixedly connected to the outer wall of the tube body (1), the outer wall of the locking joint (203) is fixedly connected to a plurality of toothed locking parts (201), the inner wall of the tube body (1) is provided with a plurality of locking grooves (205), and the inner wall of the tube body (1) is provided with a sealing groove (204).

3. The low temperature resistant sheath of claim 2, wherein: The sealing mechanism (2) also includes a sealing ring (202), and the outer wall of the locking joint (203) is fixedly connected with the sealing ring (202).

4. The low-temperature resistant sheath tube according to claim 1, characterized in that: The passage component includes multiple air passages (7), the outer wall of the air passages (7) is fixedly connected to the inner wall of the heat-insulating airbag (4), and the heat-insulating airbag (4) has multiple chambers (6) inside.

5. The low-temperature resistant sheath tube according to claim 1, characterized in that: The inflation assembly includes an air column (18), one end of which is fixedly connected to the outer wall of the heat preservation air bag (4), and the other end of which is fixedly connected to an inflation port (19). A rotating shaft (20) is fixedly connected to the outer wall of the inflation port (19), and a sealing cover (21) is rotatably connected to the outer wall of the rotating shaft (20).

6. The low-temperature resistant sheath tube according to claim 1, characterized in that: The reinforcement component includes multiple reinforcement rings (12), which are fixedly connected to the outer wall of the tube body (1).

7. The low-temperature resistant sheath tube according to claim 1, characterized in that: The outer wall of the tube body (1) is fixedly connected to a first clamp (13), the outer wall of the first clamp (13) is rotatably connected to a connector (15), and the outer wall of the connector (15) is rotatably connected to a second clamp (14).

8. The low-temperature resistant sheath tube according to claim 7, characterized in that: The inner wall of the first clamp (13) is threaded with a screw (16), and the outer wall of the screw (16) is threaded with a knob (17).

Images