Compression-resistant and heat-insulating cable conduit structure

Abstract

The utility model relates to the technical field of cable conduits, and discloses a pressure-resistant heat-insulating cable conduit structure, which comprises an inner pipe and an outer pipe, the inner pipe is made of metal, the outer pipe is made of plastic, two ends of the inner pipe are provided with supporting pipes, the supporting pipes are connected with the end parts of the inner pipe into a whole, the outer diameter of each supporting pipe is larger than that of the inner pipe, and the outer diameter of each supporting pipe is larger than that of the inner pipe. The outer pipe is in clearance fit with the supporting pipe, annular end covers are arranged at the two ends of the outer pipe, and a closed annular heat insulation cavity is formed between the outer pipe and the inner pipe. The utility model has the beneficial effects of good compression resistance and good heat insulation performance.

Description

Technical Field

[0001] This utility model relates to the field of cable conduit technology, and in particular to a pressure-resistant and heat-insulating cable conduit structure. Background Technology

[0002] Cable conduits, also known as power conduits or cable protection conduits, are primarily used for cables to pass through and provide safety protection. Common cable conduits include metal cable conduits and plastic cable conduits. Metal cable conduits are strong but prone to corrosion, while plastic cable conduits have strong corrosion resistance but insufficient compressive strength. Due to the poor thermal insulation and high thermal conductivity of metal cable conduits, in hot or cold regions, the external ambient temperature can adversely affect the cables inside the conduits, thereby reducing cable stability. Utility Model Content

[0003] In order to solve the above-mentioned problems in the prior art, this utility model provides a composite cable conduit with good compressive strength and good thermal insulation performance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pressure-resistant and heat-insulating cable conduit structure includes an inner tube and an outer tube. The inner tube is made of metal, and the outer tube is made of plastic. Support tubes are provided at both ends of the inner tube, and these support tubes are integrally connected to the ends of the inner tube. The outer diameter of the support tube is larger than that of the inner tube. The outer tube and the support tubes are fitted with a clearance fit. Both ends of the outer tube are provided with annular end caps. A closed annular heat-insulating cavity is formed between the outer tube and the inner tube. The inner tube, made of metal, has high strength and good pressure resistance, while the outer tube, made of plastic, has good heat insulation and corrosion resistance. The support tubes at both ends of the inner tube, and the outer tube fitted onto the support tubes, create an annular heat-insulating cavity between the outer tube and the inner tube, thereby improving the overall heat insulation performance.

[0006] Preferably, the outer wall of the support tube is provided with several circumferentially evenly distributed ribs, and the inner wall of the outer tube is provided with grooves that penetrate both ends of the outer tube and are adapted to the ribs. The ribs increase strength on the one hand, and on the other hand, they cooperate with the grooves to limit circumferential movement and prevent relative rotation between the outer and inner tubes.

[0007] Preferably, the annular end cap has an outer connecting sleeve on its outer side and an inner connecting sleeve coaxially distributed with the outer connecting sleeve on its inner side. An annular groove is formed between the outer connecting sleeve and the inner connecting sleeve. The ends of the outer tube and the inner tube extend into the annular groove and are fixed with adhesive. The direct insertion of the ends of the outer tube and the inner tube into the annular groove and the sealing fixation with adhesive ensure good sealing performance at the connection between the ends of the inner tube and the outer tube, preventing moisture from easily seeping into the inner tube through the ends, thereby preventing corrosion of the inner tube.

[0008] Preferably, the inner diameter of the support tube is larger than the inner diameter of the inner tube, and the inner diameter of the inner connecting sleeve is greater than or equal to the inner diameter of the inner tube. The inner connecting sleeve contains a cable support, which includes a support ring coaxially distributed with the inner tube and several support bars for connecting the support ring and the inner connecting sleeve. The connecting bars divide the space between the support ring and the inner connecting sleeve into several cable channels for cables to pass through. The inner diameter of the inner connecting sleeve is greater than or equal to the inner diameter of the inner tube, ensuring that the cable does not contact the end of the inner connecting sleeve when passing through the inner tube. The cable support increases the strength of the cable conduit end and facilitates the separation of different cables, preventing them from being squeezed or tangled together.

[0009] Preferably, a heat-insulating sleeve is fitted onto the outer surface of the inner tube, and the heat-insulating sleeve is disposed within the annular heat-insulating cavity. The heat-insulating sleeve further enhances the heat insulation performance of the annular heat-insulating cavity.

[0010] Preferably, an insulating tube is wound around the outer side of the insulating sleeve, and the insulating tube is wound in a cylindrical spiral on the outer surface of the insulating sleeve. The insulating tube fills the annular insulating gap, and the outer surface of the insulating tube can support the inner wall of the outer tube, increase the compressive strength of the middle part of the outer tube, and maintain heat insulation through the air inside the insulating tube.

[0011] Therefore, this utility model has the beneficial effects of good compressive strength and good thermal insulation performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0013] Figure 2 This is a cross-sectional view of Example 1.

[0014] Figure 3 This is an exploded view of Example 1.

[0015] Figure 4 This is a cross-sectional view of Example 2.

[0016] Figure 5 This is an exploded view of Example 2. Detailed Implementation

[0017] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model.

[0018] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0019] Example 1: As Figure 1 , Figure 2 , Figure 3 The illustrated pressure-resistant and heat-insulating cable conduit structure includes an inner tube 1 and an outer tube 2. The inner tube 1 is made of metal, and the outer tube 2 is made of plastic. Support tubes 3 are provided at both ends of the inner tube 1, and the support tubes 3 are integrally connected to the ends of the inner tube 1. The outer diameter of the support tube 3 is larger than the outer diameter of the inner tube 1. The outer tube 2 and the support tube 3 are fitted with a clearance fit. Annular end caps 4 are provided at both ends of the outer tube 2, forming a closed annular heat-insulating cavity 10 between the outer tube 2 and the inner tube 1. Several circumferentially evenly distributed ribs 30 are provided on the outer wall of the support tube 3, and grooves 20, which penetrate both ends of the outer tube 2 and are adapted to the ribs 30, are provided on the inner wall of the outer tube 2.

[0020] In some embodiments, the inner tube may be made of stainless steel, iron, etc., and the outer tube may be made of MPP or PVC. The end caps are made of the same material as the outer tube.

[0021] An outer connecting sleeve 40 is provided on the outer side of the annular end cap 4, and an inner connecting sleeve 41 is provided on the inner side of the annular end cap 4, which is coaxially distributed with the outer connecting sleeve 40. An annular groove 42 is formed between the outer connecting sleeve 40 and the inner connecting sleeve 41. The ends of the outer tube 2 and the inner tube 1 are inserted into the annular groove 42 and then fixed by adhesive.

[0022] The inner diameter of the support tube 3 is larger than the inner diameter of the inner tube 1, and the inner diameter of the inner connecting sleeve 41 is greater than or equal to the inner diameter of the inner tube 1. The inner connecting sleeve 41 is provided with a cable bracket 43. The cable bracket 43 includes a support ring 430 coaxially distributed with the inner tube 1 and several support bars 431 for connecting the support ring 430 and the inner connecting sleeve 41. The connecting bars divide the space between the support ring 430 and the inner connecting sleeve 41 into several cable channels 432 for cables to pass through.

[0023] Example 2: As Figure 1 , Figure 4 and Figure 5 As shown, the difference between Embodiment 2 and Embodiment 1 is that: a heat insulation sleeve 5 is fitted on the outer surface of the inner tube 1, the heat insulation sleeve 5 is set in the annular heat insulation cavity 10, and a heat insulation tube 6 is wound around the outer side of the heat insulation sleeve 5. The heat insulation tube 6 is wound around the outer surface of the heat insulation sleeve 5 in a cylindrical spiral manner. In some embodiments, the heat insulation sleeve is made of materials such as glass wool, polyurethane, and aerogel; the heat insulation tube is made of polyethylene pipe, which has good heat resistance, cold resistance and corrosion resistance, and is flexible and lightweight.

[0024] Referring to the accompanying drawings, the principle of this utility model is as follows: the inner tube made of metal material has good pressure resistance, and the outer tube made of plastic material has good heat insulation and corrosion resistance. After the outer tube and the inner tube are sleeved together, an annular heat insulation cavity is formed, which further enhances the heat insulation performance. At the same time, the outer tube is further enhanced by wearing a heat insulation sleeve and wrapping a heat insulation ring, which also improves the support strength of the outer tube.

[0025] In the description of this utility model, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solution of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0026] Although specific embodiments of the present invention are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the present invention. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A pressure-resistant and heat-insulating cable conduit structure, characterized in that, It includes an inner tube (1) and an outer tube (2). The inner tube (1) is made of metal and the outer tube (2) is made of plastic. Both ends of the inner tube (1) are provided with support tubes (3). The support tubes (3) are connected to the ends of the inner tube (1) as a whole. The outer diameter of the support tube (3) is larger than the outer diameter of the inner tube (1). The outer tube (2) and the support tube (3) are fitted with a clearance. Both ends of the outer tube (2) are provided with annular end caps (4). A closed annular heat insulation cavity (10) is formed between the outer tube (2) and the inner tube (1).

2. The pressure-resistant and heat-insulating cable conduit structure according to claim 1, characterized in that, The outer wall of the support tube (3) is provided with several convex ribs (30) evenly distributed in the circumferential direction, and the inner wall of the outer tube (2) is provided with grooves (20) that fit the convex ribs (30) through both ends of the outer tube (2).

3. The pressure-resistant and heat-insulating cable conduit structure according to claim 2, characterized in that, The outer side of the annular end cap (4) is provided with an outer connecting sleeve (40), and the inner side of the annular end cap (4) is provided with an inner connecting sleeve (41) coaxially distributed with the outer connecting sleeve (40). An annular groove (42) is formed between the outer connecting sleeve (40) and the inner connecting sleeve (41). The ends of the outer tube (2) and the inner tube (1) extend into the annular groove (42) and are fixed by adhesive.

4. The pressure-resistant and heat-insulating cable conduit structure according to claim 3, characterized in that, The inner diameter of the support tube (3) is greater than the inner diameter of the inner tube (1), and the inner diameter of the inner connecting sleeve (41) is greater than or equal to the inner diameter of the inner tube (1). The inner connecting sleeve (41) is provided with a cable bracket (43). The cable bracket (43) includes a support ring (430) coaxially distributed with the inner tube (1) and a plurality of support bars (431) for connecting the support ring (430) and the inner connecting sleeve (41). The support bars (431) divide the space between the support ring (430) and the inner connecting sleeve (41) into a plurality of cable channels (432) for the cable to pass through.

5. A pressure-resistant and heat-insulating cable conduit structure according to any one of claims 1-4, characterized in that, The outer surface of the inner tube (1) is fitted with a heat insulation sleeve (5), which is located inside the annular heat insulation cavity (10).

6. The pressure-resistant and heat-insulating cable conduit structure according to claim 5, characterized in that, The outer side of the heat insulation sleeve (5) is wrapped with a heat insulation tube (6), which is wound around the outer surface of the heat insulation sleeve (5) in a cylindrical spiral manner.

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