A laying insulation structure and its underground cable PE conduit
By using a combination structure of an outer cable conduit jacket, an inner tensile fiber strip, and a protective outer shell and a concrete sheath, the problem of insufficient waterproofing in cable conduits is solved, achieving efficient waterproofing and protection, and extending the service life of the cable conduit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU LINGYU PLASTIC PIPE TECH CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-26
AI Technical Summary
The existing cable conduits are not waterproof enough, which reduces their service life.
The cable is protected by an outer PE corrugated conduit, with a tensile fiber strip and a protective inner tube inside. The combination of the protective outer shell, concrete sheath, and alignment plate forms a double protection structure, which improves the waterproof performance.
It enables rapid and convenient installation of cable conduits and provides all-round protection, significantly improving waterproofing and extending the service life of cable conduits.
Smart Images

Figure CN224418402U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable PE conduit technology, specifically to a laying isolation structure and its underground cable PE conduit. Background Technology
[0002] Underground cable PE conduit is a protective product made of high-quality high-density polyethylene resin as the main raw material, with the addition of appropriate additives, and processed by extrusion. It has significant advantages in the field of underground cable protection, serving as a conduit for cables such as power, street lights, and intelligent transportation, thereby protecting the cables from the influence of the external environment.
[0003] For example, the utility model patent disclosed in publication number CN219643555U discloses a cable duct laying structure, including an assemblable precast concrete body. Several parallel plastic pipes are arranged within the precast concrete body along its length. One end of the precast concrete body has a first connecting flange frame and several slots, and the other end has a second connecting flange frame and several inserts. The inserts and slots between adjacent precast concrete bodies are connected by insertion. Both ends of the precast concrete body also have positioning guide rods and positioning holes, with the length of the positioning guide rods being greater than the length of the inserts. This laying structure uses precast concrete duct bodies for assembly on-site. It is simple in structure, easy to connect and use, greatly reducing the difficulty and workload of construction on-site, improving construction efficiency and assembly quality, and facilitating the mass laying of cables.
[0004] Although the above-mentioned laying structure can protect the cable conduit, it is insufficient in terms of waterproofing the cable exterior, which reduces the service life of the cable conduit. Therefore, there is an urgent need for a laying isolation structure and its underground cable PE conduit to solve the above-mentioned problems. Utility Model Content
[0005] The purpose of this utility model is to provide a laying isolation structure and its underground cable PE conduit to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an underground cable PE conduit, comprising a cable PE conduit, the cable PE conduit including a cable PE corrugated conduit, a cable conduit jacket fixedly disposed on the outer end face of the cable PE corrugated conduit, and tensile fiber strips equidistantly disposed inside the cable PE corrugated conduit, and a protective inner tube fixedly disposed on the inner wall of the cable PE corrugated conduit.
[0007] A laying isolation structure includes two sets of alignment plates for support. Protective sleeves are equidistantly arranged inside the two sets of alignment plates, and a positioning guide groove is provided on the inner end face of each set of protective sleeves extending to the outside of the alignment plate. A concrete shell is fixedly provided on the inner end face of the two sets of alignment plates, and a protective outer shell is provided on the outside of the alignment plates. The cable PE conduit is equidistantly arranged on the inner end face of the positioning guide groove.
[0008] Preferably, the alignment plate and the protective shell are made of stainless steel, which can effectively improve the service life of the equipment and also improve the waterproof function.
[0009] Preferably, the cable conduit jacket is slidably disposed on the inner end face of the protective sleeve via the positioning guide groove, which facilitates the subsequent quick and convenient positioning and assembly of the cable PE conduit.
[0010] Preferably, the outer sheath of the cable conduit is made of PVC, which can effectively improve the external protection of the conduit and thus increase the service life of the cable conduit.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. In this utility model, the protective outer shell, concrete sleeve, alignment plate, and protective pipe sleeve are all prefabricated and assembled, which can effectively improve the convenience of subsequent laying of cable PE conduits. At the same time, the concrete sleeve can provide all-round protection for the outside of the protective pipe sleeve, and the combination of the protective outer shell and the alignment plate can further improve the waterproof function of the equipment. The dual protection and waterproof structure can effectively improve the protection and waterproof function of the cable PE conduit, thereby improving the service life of the cable PE conduit. Attached Figure Description
[0013] Figure 1 This is an exploded view of the main body of this utility model;
[0014] Figure 2 This is a schematic diagram of the main structure of the present utility model;
[0015] Figure 3 This is an exploded view of the PE conduit for cables according to this utility model;
[0016] Figure 4 This is a schematic diagram of the structure of the PE conduit for cables according to this utility model.
[0017] In the diagram: 1-protective outer shell, 2-cable PE conduit, 3-alignment plate, 4-positioning guide groove, 5-concrete casing, 6-protective sleeve, 21-cable conduit outer jacket, 22-cable PE corrugated conduit, 23-tensile fiber strip, 24-protective inner tube. Detailed Implementation
[0018] 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.
[0019] Please see Figure 1-4 An embodiment of this utility model is provided: an underground cable PE conduit, including a cable PE conduit 2, the cable PE conduit 2 including a cable PE corrugated conduit 22, a cable conduit jacket 21 is fixedly provided on the outer end face of the cable PE corrugated conduit 22, and tensile fiber strips 23 are equidistantly arranged inside the cable PE corrugated conduit 22, and a protective inner tube 24 is fixedly provided on the inner wall of the cable PE corrugated conduit 22.
[0020] A laying isolation structure includes two sets of alignment plates 3 for support. Protective sleeves 6 are equidistantly arranged inside the two sets of alignment plates 3. A positioning guide groove 4 is provided on the inner end face of each set of protective sleeves 6, extending to the outside of the alignment plate 3. A concrete shell 5 is fixedly provided on the inner end face of the two sets of alignment plates 3. A protective outer shell 1 is provided on the outside of the alignment plates 3. The cable PE conduit 2 is equidistantly arranged on the inner end face of the positioning guide groove 4.
[0021] The alignment plate 3 and the protective shell 1 are made of stainless steel, which can effectively improve the service life of the equipment and also improve the waterproof function.
[0022] The cable conduit jacket 21 is slidably mounted on the inner end face of the protective sleeve 6 via the positioning guide groove 4, which facilitates the quick and convenient positioning and assembly of the cable PE conduit 2.
[0023] The cable conduit jacket 21 is made of PVC, which can effectively improve the external protection of the conduit and thus increase the service life of the cable conduit.
[0024] Working principle: Before use, the protective shell 1, concrete sleeve 5, alignment plate 3, and protective pipe sleeve 6 are all prefabricated and assembled, which can effectively improve the convenience of subsequent laying of cable PE conduit 2. At the same time, the concrete sleeve 5 can provide all-round protection for the exterior of the protective pipe sleeve 6, and the combination of the protective shell 1 and the alignment plate 3 can further improve the waterproof function of the equipment exterior. The double protection and waterproof structure can effectively improve the protection and waterproof function of cable PE conduit 2, thereby improving the service life of cable PE conduit 2.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An underground cable PE conduit, comprising a cable PE conduit (2), characterized in that: The cable PE conduit (2) includes a cable PE corrugated conduit (22), a cable conduit jacket (21) is fixedly provided on the outer end face of the cable PE corrugated conduit (22), and tensile fiber strips (23) are equidistantly provided inside the cable PE corrugated conduit (22), and a protective inner tube (24) is fixedly provided on the inner wall of the cable PE corrugated conduit (22).
2. A laying isolation structure, comprising two sets of alignment plates (3) for support, characterized in that: It also includes the underground cable PE conduit as described in claim 1.
3. The laying isolation structure according to claim 2, characterized in that: The two sets of alignment plates (3) are provided with protective sleeves (6) at equal intervals inside, and a positioning guide groove (4) is provided on the inner end face of each set of protective sleeves (6) extending to the outside of the alignment plate (3). A concrete shell (5) is fixedly provided on the inner end face of the two sets of alignment plates (3), and a protective shell (1) is provided on the outside of the alignment plate (3). The cable PE conduit (2) is provided at equal intervals on the inner end face of the positioning guide groove (4).
4. The laying isolation structure according to claim 3, characterized in that: The alignment plate (3) and the protective shell (1) are made of stainless steel.
5. The laying isolation structure according to claim 3, characterized in that: The cable conduit jacket (21) is slidably disposed on the inner end face of the protective sleeve (6) through the positioning guide groove (4).
6. The laying isolation structure according to claim 3, characterized in that: The cable conduit jacket (21) is made of PVC.