Composite cable conduit

Abstract

The utility model relates to the technical field of cable conduits, and discloses a composite cable conduit which comprises an inner pipe and an outer pipe, the inner pipe is made of metal, the outer pipe is made of MPP materials, an annular cavity is formed between the inner pipe and the outer pipe, the inner wall of the outer pipe is provided with a plurality of supporting rings which are evenly distributed in the axial direction, and the supporting rings are arranged in the annular cavity. An inner hole of the supporting ring is in clearance fit with the outer surface of the outer pipe, and end covers are arranged at the two ends of the outer pipe and are made of MPP materials. The utility model has the beneficial effects of good compression resistance and good corrosion resistance.

Description

Technical Field

[0001] This utility model relates to the field of cable conduit technology, and in particular to a composite cable conduit. 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 types of 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. 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 corrosion resistance.

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

[0005] A composite cable conduit includes an inner tube and an outer tube. The inner tube is made of metal, and the outer tube is made of MPP material. An annular cavity is formed between the inner and outer tubes. The inner wall of the outer tube has several axially evenly distributed support rings, with the inner holes of the support rings fitting with the outer surface of the outer tube. Both ends of the outer tube have end caps made of MPP material. The metal inner tube has high strength and good compressive strength. The MPP material outer tube protects the inner tube from corrosion. The numerous support rings on the inner wall of the outer tube further increase its strength. Simultaneously, the annular cavity between the inner and outer tubes increases overall strength and also enhances overall thermal insulation, preventing the influence of external temperatures on the cable.

[0006] Preferably, the outer wall of the inner tube is provided with a plurality of raised ribs evenly distributed along the circumference and parallel to the axis. The inner wall of the outer tube is provided with corresponding supporting ribs, and the supporting ribs are provided with grooves that fit the raised ribs. The raised ribs further increase the strength of the inner tube, and the cooperation between the raised ribs and the grooves on the supporting ribs prevents relative rotation between the inner and outer tubes.

[0007] Preferably, the inner end of the end cap is provided with a plurality of circumferentially distributed locking blocks, and a clearance groove is provided between adjacent locking blocks to avoid the supporting protrusion. The ends of the locking blocks are engaged in the annular cavity and fixed with adhesive. The locking blocks at the inner end of the end cap are engaged in the annular cavity, so that the ends of the inner tube and the outer tube are closed by the end cap, while increasing the strength of both ends of the cable conduit.

[0008] Preferably, both ends of the locking block are chamfered. The chamfers facilitate the locking block's engagement into the annular cavity between the two supporting protrusions.

[0009] Preferably, the outer tube has annular grooves on its outer walls at both ends, and the edge of the end cap extends to form a sleeve that fits into the annular groove. The sleeve is fixed to the annular groove with an adhesive, and the outer diameter of the sleeve is equal to the outer diameter of the outer tube. The sleeve increases the connection strength and sealing performance between the ends of the inner and outer tubes.

[0010] Preferably, one end cap has a first connecting sleeve at its outer end, and the other end cap has a second connecting sleeve at its outer end, with the inner wall of the second connecting sleeve fitting with the outer surface of the first connecting sleeve. During cable conduit installation, the first and second connecting sleeves are first joined together, and then connected using a pipe fitting. During connection, the first and second connecting sleeves serve a pre-positioning function and also increase the sealing performance of the connection.

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

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

[0013] Figure 2 for Figure 1 Exploded view.

[0014] Figure 3 for Figure 1 Cross-sectional view.

[0015] Figure 4 This is a cross-sectional view of the outer tube.

[0016] Figure 5 This is a schematic diagram of the longitudinal section of this utility model.

[0017] Figure 6 This is a schematic diagram of the end cap structure.

[0018] Figure 7 This is a schematic diagram of the connection between the two cable conduits. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] like Figures 1-7 The composite cable conduit shown 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 MPP material. An annular cavity 3 is formed between the inner tube 1 and the outer tube 2. A plurality of support rings 20 are provided on the inner wall of the outer tube 2, which are evenly distributed along the axial direction. The inner hole of the support ring 20 is clearance-fitted with the outer surface of the outer tube 2. End caps 4 are provided at both ends of the outer tube 2, and the end caps 4 are made of MPP material. In some embodiments, the inner tube is made of stainless steel or iron.

[0022] The outer wall of the inner tube 1 is uniformly provided with several raised ribs 10 parallel to the axis along the circumference. The inner wall of the outer tube 2 is provided with raised ribs 10, and corresponding supporting ribs 21 are provided at the locations of the raised ribs 10. The supporting ribs 21 are provided with grooves 21 that are adapted to the raised ribs 10. Figure 6 As shown, the inner end of the end cap 4 is provided with several circumferentially distributed locking blocks 40, and there is a clearance groove 41 between adjacent locking blocks 40 for avoiding the support protrusion 21. The end of the locking block 40 is locked into the annular cavity 3 and fixed by adhesive; both ends of the locking block 40 are provided with chamfered corners 42.

[0023] The outer walls at both ends of the outer tube 2 are provided with annular grooves 200. The edge of the end cap 4 extends to form a sleeve 43 that fits into the annular groove 200. The sleeve 43 is fixed to the annular groove 200 by an adhesive. The outer diameter of the sleeve 43 is equal to the outer diameter of the outer tube 2. One end cap 4 has a first connecting sleeve 44 at its outer end, and the other end cap 4 has a second connecting sleeve 45 at its outer end. The inner wall of the second connecting sleeve 45 is clearance-fitted with the outer surface of the first connecting sleeve 44.

[0024] Referring to the accompanying drawings, the principle of this utility model is as follows: the inner tube is made of metal and the outer tube is made of MPP plastic, effectively combining the strength and compressive strength of the metal tube with the corrosion resistance of the MPP material. The strength of the outer tube is increased by using support rings and support bosses, and the strength of the inner tube is increased by using ribs. At the same time, the ribs and the grooves on the support ribs cooperate to achieve circumferential positioning between the inner and outer tubes. The end caps seal the ends of the inner and outer tubes, increase the strength of both ends of the cable conduit, and facilitate the initial positioning of the cable conduit during installation.

[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 composite cable conduit, 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 MPP material. An annular cavity (3) is formed between the inner tube (1) and the outer tube (2). Several support rings (20) are evenly distributed along the axial direction on the inner wall of the outer tube (2). The inner hole of the support ring (20) is clearance-fitted with the outer surface of the outer tube (2). Both ends of the outer tube (2) are provided with end caps (4), which are made of MPP material.

2. The composite cable conduit according to claim 1, characterized in that, The outer wall of the inner tube (1) is uniformly provided with several ribs (10) parallel to the axis along the circumference. The inner wall of the outer tube (2) is provided with ribs (10) and corresponding support ribs (21). The support ribs (21) are provided with grooves (210) that are adapted to the ribs (10).

3. The composite cable conduit according to claim 2, characterized in that, The inner end of the end cap (4) is provided with a plurality of circumferentially distributed locking blocks (40), and a clearance groove (41) for avoiding the support protrusion (21) is provided between adjacent locking blocks (40). The locking blocks (40) are engaged into the end of the annular cavity (3) and fixed by adhesive.

4. A composite cable conduit according to claim 3, characterized in that, Both ends of the card block (40) are provided with chamfered corners (42).

5. A composite cable conduit according to claim 3, characterized in that, The outer walls at both ends of the outer tube (2) are provided with annular grooves (200). The edge of the end cap (4) extends to form a sleeve (43) that fits into the annular groove (200). The sleeve (43) and the annular groove (200) are fixed together by an adhesive. The outer diameter of the sleeve (43) is equal to the outer diameter of the outer tube (2).

6. A composite cable conduit according to any one of claims 1-5, characterized in that, in one of them The outer end of the end cap (4) is provided with a first connecting sleeve (44), and the outer end of the other end cap (4) is provided with a second connecting sleeve (45). The inner wall of the second connecting sleeve (45) is clearance-fitted with the outer surface of the first connecting sleeve (44).

Images