Pvc-u wire tube
By incorporating a connecting sleeve, reinforcing rod, and movable block, the design solves the problem of cumbersome connections in existing PVC-U conduits, enabling rapid installation and enhanced sealing and protection, thus improving the practicality of the conduits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN LIANSU IND CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-10
AI Technical Summary
The existing PVC-U conduit requires multiple screws for connection during installation, making installation and disassembly cumbersome and impractical.
The design incorporates a connecting sleeve, reinforcing rod, and movable block. It enables quick connection and fixation of electrical conduits through an annular slot and rubber pad. The locking structure between the reinforcing rod and the outer sleeve allows for tool-free fixation, and the reinforcing rod also provides a protective function.
It enables rapid connection and fixation of electrical conduits, improves installation efficiency, enhances sealing and protection, simplifies operation procedures, and improves safety during use.
Smart Images

Figure CN224481428U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical conduit, and in particular to a PVC-U electrical conduit. Background Technology
[0002] PVC-U (unplasticized polyvinyl chloride) conduit is a rigid pipe made from polyvinyl chloride resin as the main raw material, with the addition of stabilizers, lubricants and other additives. It is specifically designed for the protection of electrical wires and cables in buildings. Through optimized formulation and process, PVC-U conduit combines rigidity with toughness, has uniform wall thickness and a smooth inner wall, significantly reducing wire pulling resistance, and is therefore widely used in electrical wiring construction.
[0003] However, during the installation of existing PVC-U conduits, adjacent conduits need to be spliced together using clamps and screws to form a longer conduit. The existing clamp and screw connection method requires tools to fix the screws one by one, and 8-12 screws are needed at one connection point. This method takes a lot of time to assemble and is also cumbersome to disassemble. The overall practicality is questionable. Utility Model Content
[0004] In order to solve the problems in the background art, this utility model adopts the following technical solution:
[0005] A PVC-U electrical conduit includes a conduit body and connectors disposed on both sides of the conduit body, as well as connecting sleeves and reinforcing rods. The connecting sleeves are connected between adjacent conduit bodies. An outer sleeve is fixedly fitted on the outside of the connecting sleeve. Multiple sets of connection ports are provided on the outside of the outer sleeve. The two sides of the reinforcing rod are respectively snapped into the connection ports on the outside of the adjacent outer sleeves. Movable blocks are symmetrically and movably disposed in the connection ports. Two sets of symmetrical clips are fixedly connected to the outside of the movable blocks. The outside of the reinforcing rod is provided with a groove that engages with the clips.
[0006] Preferably, the connecting sleeve is provided with annular slots on both sides, and the connecting sleeve is engaged with the connector on the outside of the adjacent conduit body through the annular slots on both sides.
[0007] Preferably, rubber pads are provided on the outer surface of the connecting sleeve in contact with the conduit body and on the inner wall of the annular slot in contact with the connector.
[0008] Preferably, the reinforcing rod is made of rubber.
[0009] Preferably, the movable block is connected to the inner wall of the connection port by a spring telescopic pin, and the spring telescopic pin is in a spring-extended state by default.
[0010] Compared with the prior art, the present invention has the following beneficial effects;
[0011] This utility model connects adjacent conduit bodies using a connecting sleeve. The annular slot at the connection point and the rubber pad on the contact surface enhance the sealing effect of the conduit body connection. A matching outer sleeve is welded to the outside of the connecting sleeve, and a reinforcing rod is snapped between adjacent outer sleeves. The locking of the two ends of the reinforcing rod with the outer sleeve achieves locking between adjacent connecting sleeves, thus securing the connecting sleeve to the conduit body. No tools are required; a simple limiting structure suffices, making it very convenient. Furthermore, the multiple sets of reinforcing rods also act as a protective reinforcement structure on the outside of the conduit body, improving overall safety against squeezing during use. Attached Figure Description
[0012] Fig. 1 This is a schematic diagram of the structure of this utility model;
[0013] Fig. 2 This is a schematic diagram of the structure at point A of this utility model;
[0014] Fig. 3 This is a side view of the connecting sleeve structure of this utility model.
[0015] In the diagram: 1-Electric conduit body, 2-Connector, 3-Connecting sleeve, 301-Rubber pad, 4-Outer sleeve, 5-Reinforcing rod, 6-Connecting port, 7-Moving block, 701-Spring telescopic pin, 8-Clip, 9-Clip groove, 10-Annular slot. Detailed Implementation
[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0017] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0020] Reference Figs. 1-3 A PVC-U electrical conduit includes a conduit body 1 and connectors 2 disposed on both sides of the conduit body 1. It also includes connecting sleeves 3 and reinforcing rods 5. Connecting sleeves 3 are connected between adjacent conduit bodies 1. Outer sleeves 4 are fixedly fitted onto the outer side of the connecting sleeves 3. Multiple sets of connection ports 6 are provided on the outer side of the outer sleeves 4. The reinforcing rods 5 are respectively engaged in the connection ports 6 on both sides of the adjacent outer sleeves 4. Movable blocks 7 are symmetrically and movably disposed in the connection ports 6. Two sets of symmetrical clips 8 are fixedly connected to the outer side of the movable blocks 7. The reinforcing rods 5 have slots 9 on their outer sides that engage with the clips 8. Annular slots 10 are provided on both sides of the connecting sleeves 3, and the connecting sleeves 3 are engaged with the connectors 2 on the outer side of the adjacent conduit bodies 1 through the annular slots 10 on both sides. The movable blocks 7 are connected to the inner walls of the connection ports 6 by spring telescopic pins 701, which are in a spring-extended state by default.
[0021] Based on the above structure, when using this device, the operator uses the connecting sleeve 3 to engage with the connector 2 on the outside of the adjacent conduit body 1 through the annular slots 10 on both sides, thereby connecting the adjacent conduit bodies 1. This process is repeated until multiple conduit bodies 1 are connected. Then, the reinforcing rod 5 is inserted into the connection port 6 on the outside of the outer connecting sleeve 4 of the adjacent connecting sleeve 3. During the insertion of the reinforcing rod 5, it is pre-aligned with the connection port 6, and the two sets of movable blocks 7 are manually opened while simultaneously pressing the outer spring telescopic pin 701. The reinforcing rod 5 is then inserted to the bottom of the connection port 6, and then the movable blocks 701 are released. Under the elastic restoring force of the spring telescopic pin 701, the movable block 7 moves back and causes the locking head 8 of the inner groove of the movable block 7 to engage with the locking groove 9 at the outer end of the reinforcing rod 5, thus completing the fixed installation of the outer side of the reinforcing rod 5. The locking between the two ends of the reinforcing rod 5 and the outer sleeve 4 is used to achieve the locking between the adjacent connecting sleeves 3, that is, to achieve the fixed installation of the connecting sleeve 3 and the conduit body 1. No tools are required, and it can be done through a simple limiting structure, which is very convenient. Multiple sets of reinforcing rods 5 can also serve as a protective reinforcement structure on the outside of the conduit body 1, improving the overall anti-pinch safety effect during use.
[0022] Rubber pads 301 are provided on the outer side of the connecting sleeve 3 and the contact surface between the wire conduit body 1 and the inner wall of the annular slot 10 and the contact surface between the connector 2. The rubber pads 301 can increase the overall sealing effect and increase the friction of the contact surface, so as to achieve a non-slip and stable connection effect.
[0023] Among them, the reinforcing rod 5 is made of rubber, which can help buffer and absorb shock when subjected to longitudinal compression, thereby improving the overall compression resistance.
[0024] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.
[0025] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
Claims
1. A PVC-U electrical conduit, comprising a conduit body (1) and connectors (2) disposed on both sides of the conduit body (1), further comprising a connecting sleeve (3) and a reinforcing rod (5), characterized in that, The connecting sleeve (3) is connected between adjacent conduit bodies (1). An outer sleeve (4) is fixedly fitted on the outside of the connecting sleeve (3). Multiple sets of connection ports (6) are provided on the outside of the outer sleeve (4). The reinforcing rod (5) is respectively snapped into the connection ports (6) on the outside of the adjacent outer sleeve (4). A movable block (7) is symmetrically and movably arranged in the connection port (6). Two sets of symmetrical clips (8) are fixedly connected on the outside of the movable block (7). A slot (9) is provided on the outside of the reinforcing rod (5) to engage with the clips (8).
2. The PVC-U conduit according to claim 1, characterized in that, The connecting sleeve (3) is provided with annular slots (10) on both sides, and the connecting sleeve (3) is engaged with the connector (2) on the outside of the adjacent conduit body (1) through the annular slots (10) on both sides.
3. A PVC-U conduit according to claim 2, characterized in that, Rubber pads (301) are provided on the outer side of the connecting sleeve (3) in contact with the conduit body (1) and on the inner wall of the annular slot (10) in contact with the connector (2).
4. A PVC-U conduit according to claim 3, characterized in that, The reinforcing rod (5) is made of rubber rod material.
5. A PVC-U conduit according to claim 4, characterized in that, The movable block (7) is connected to the inner wall of the connection port (6) by a spring telescopic pin (701), and the spring telescopic pin (701) is in a spring-extended state by default.