Lead-free high-toughness PVC electrical conduit

Abstract

The utility model discloses a leadless high toughness PVC electrician sleeve belongs to PVC sleeve technical field. This kind of leadless high toughness PVC electrician sleeve, including sleeve body, the one end of sleeve body is equipped with the joint, the inside of joint is provided with the pipe hole, the inside top of pipe hole is provided with the slot, the sleeve body is installed with the plug -in block of the slot in the one end away from the joint, locking assembly, locking assembly sets up in one side of joint, locking assembly includes screw rod, worm, worm wheel and lead screw, the inside one side of joint is provided with the cavity, the bottom of cavity is communicated with the top surface of slot, the inside rotation -connected screw rod of cavity, the outer wall of screw rod is equipped with worm, the utility model discloses, through the cooperation of joint, pipe hole, slot, plug -in block and locking assembly, the junction of electrician sleeve can keep fastening in real time, avoid the bad influence that the tenacity deformation causes.

Description

Technical Field

[0001] This utility model relates to the field of PVC conduit technology, specifically to lead-free, high-toughness PVC electrical conduit. Background Technology

[0002] Currently, most 0.4 kV and below power lines use PVC conduits for the wiring before and after the meter installation. However, when a fault occurs in the meter's inlet or outlet line, and it's necessary to inspect or replace a section of the wiring within the conduit, the conduit must be damaged or disassembled to address the fault. A search revealed a high-strength, ultra-tough PVC electrical conduit in Chinese patent CN208955578U. This conduit includes a PVC inner tube, a PVC outer tube fitted over the inner tube, a metal spring tube sandwiched between the inner and outer tubes, and a first silicone rubber sleeve sandwiched between the metal spring tube and the inner tube. The sleeve includes a rubber tube, a second silicone rubber tube sandwiched between the metal spring tube and the outer tube, and a pipe fitting for connecting the sleeve. The pipe fitting includes a first connecting tube, a second connecting tube, and a connecting plate connecting and communicating with the first connecting tube and the second connecting tube. The first connecting tube and the second connecting tube are respectively disposed in the middle of the first surface and the middle of the second surface of the connecting plate. The middle of the connecting plate is provided with a through hole communicating with the first connecting tube and the second connecting tube. The outer wall surface of the first connecting tube is provided with a first external thread, the outer wall surface of the second connecting tube is provided with a second external thread, and the inner wall surface of the inner tube is provided with an internal thread that can be screwed into the first external thread and the second external thread simultaneously.

[0003] Currently, existing electrical conduits require high toughness, which makes the connection at the joints prone to bending and deformation. Once deformation and loosening occur, the conduit structure will be exposed, which is detrimental to safe use. Utility Model Content

[0004] To address the problem of loosening at the joints of existing PVC electrical conduits, this invention provides a lead-free, high-toughness PVC electrical conduit.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] Lead-free, high-toughness PVC electrical conduit includes a conduit body, one end of which is fitted with a connector. The connector has a pipe hole inside, and a slot is formed at the top of the pipe hole. A plug that matches the slot is installed at the end of the conduit body away from the connector. A locking assembly is provided on one side of the connector and includes a rotating rod, a worm gear, a worm wheel, and a lead screw.

[0007] Furthermore, a cavity is provided on one side of the inside of the connector, the bottom end of the cavity is connected to the top surface of the slot, a rotating rod is rotatably connected inside the cavity, and a worm gear is fitted on the outer wall of the rotating rod.

[0008] The beneficial effect of adopting the above-mentioned further solution is that rotating the rotary rod can drive the worm gear to rotate synchronously, and utilizing the high torque characteristics of the worm gear drive makes the locking process more labor-saving. The cavity structure provides installation space for the worm gear drive, while protecting the internal transmission components from external impacts and dust.

[0009] Furthermore, a worm gear is rotatably connected to one side of the slot, and the worm gear meshes with the worm. The advantage of this further solution is that it converts the rotational motion of the worm into the rotation of the worm gear, thereby driving the lead screw to rotate. The worm gear drive has a self-locking characteristic; when the lead screw is locked to the screw hole of the insert, it prevents the worm from reversing due to vibration, ensuring the long-term stability of the sleeve connection.

[0010] Furthermore, a lead screw is fitted onto one end of the worm gear, and a screw hole is provided on one side of the insert block to engage with the lead screw.

[0011] The beneficial effects of adopting the above-mentioned further solution are that a threaded locking structure is formed, and the thread engagement can apply uniform axial pressure, so that the insert and the slot fit tightly together. At the same time, the sealing gasket is compressed, which enhances the sealing of the connection and prevents moisture and dust from entering the inside of the sleeve.

[0012] Furthermore, one end of the swivel extends to the outside of the joint and is flush with the outer wall of the joint.

[0013] The advantage of adopting the above-mentioned further solution is that it allows operators to tighten / loosen the screws directly by hand or with tools without additional disassembly steps, thus improving installation efficiency.

[0014] Furthermore, a sealing gasket ring is installed on the end of the sleeve body near the insertion block.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the sealing gasket ring near the insert is squeezed during sleeve connection, filling the gap between the insert and the slot, forming a sealing barrier, and effectively preventing moisture and dust from entering the sleeve.

[0016] Furthermore, the insert includes a block, the outer wall of which is flush with the inner wall of the slot.

[0017] The advantage of adopting the above-mentioned further solution is that it ensures that the plug can slide smoothly inside the slot.

[0018] Furthermore, the sleeve body includes an outer layer, a lead-free base layer, and an inner layer, with the lead-free base layer filling the space between the outer layer and the inner layer.

[0019] The advantage of adopting the above-mentioned further solution is that, through the encapsulation of the outer and inner layers, it can provide sealed protection for the lead-free substrate.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This lead-free, high-toughness PVC electrical conduit, through the combined use of connectors, pipe holes, slots, inserts, and locking components, ensures that the connection of the conduit remains secure in real time, preventing adverse effects caused by toughness deformation. Specifically, the conduit body and connector achieve quick insertion through the matching structure of the slots and inserts, facilitating on-site installation and disassembly of the electrical conduit. The locking component, consisting of a rotating rod, worm gear, worm wheel, and lead screw, forms a mechanical transmission system. Tightening the rotating rod causes the lead screw to engage with the screw hole of the insert, forming a high-strength locking structure that prevents toughness deformation at the conduit connection under external force, ensuring a tight connection. Attached Figure Description

[0022] Figure 1 A front perspective view of the lead-free, high-toughness PVC electrical conduit provided for this utility model;

[0023] Figure 2 Rear perspective view of the lead-free, high-toughness PVC electrical conduit provided for this utility model;

[0024] Figure 3 A schematic diagram of the locking assembly for the lead-free, high-toughness PVC electrical conduit provided by this utility model;

[0025] Figure 4 This is a cross-sectional view of the sleeve body structure of the lead-free high-toughness PVC electrical conduit provided by this utility model.

[0026] Figure 5 This is a schematic diagram of the assembly of the lead-free, high-toughness PVC electrical conduit provided by this utility model.

[0027] In the diagram: 1. Sleeve body; 101. Outer layer; 102. Lead-free base layer; 103. Inner layer; 2. Connector; 3. Pipe hole; 4. Slot; 5. Locking assembly; 501. Rotary rod; 502. Worm gear; 503. Worm wheel; 504. Lead screw; 6. Insert block; 601. Block body; 602. Screw hole; 7. Sealing gasket ring. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1-5 This utility model provides a technical solution: a lead-free, high-toughness PVC electrical conduit, comprising a conduit body 1, a connector 2 fitted at one end of the conduit body 1, a pipe hole 3 inside the connector 2, a slot 4 at the top of the pipe hole 3, and a plug 6 that matches the slot 4 installed at the end of the conduit body 1 away from the connector 2; a locking assembly 5, located on one side of the connector 2, comprising a rotating rod 501, a worm gear 502, a worm wheel 503, and a lead screw 504. The conduit body 1 and the connector 2 are quickly connected through the matching structure of the slot 4 and the plug 6, facilitating the on-site installation and disassembly of the electrical conduit; the rotating rod 501, worm gear 502, worm wheel 503, and lead screw 504 of the locking assembly 5 constitute a mechanical transmission system, which can drive the lead screw 504 to engage with the screw hole 602 of the plug 6 by tightening the rotating rod 501, forming a high-strength locking structure, preventing tough deformation of the conduit connection under external force, and ensuring the tightness of the connection.

[0030] 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.

[0031] In one embodiment of this utility model, a cavity is further provided on one side of the connector 2. The bottom end of the cavity communicates with the top surface of the slot 4. A rotating rod 501 is rotatably connected inside the cavity. A worm gear 502 is fitted onto the outer wall of the rotating rod 501. By rotating the rotating rod 501, the worm gear 502 can be driven to rotate synchronously. Utilizing the high torque characteristics of the worm gear transmission, the locking process is more labor-saving. The cavity structure provides installation space for the worm gear transmission while protecting the internal transmission components from external impacts and dust.

[0032] In one embodiment of this utility model, a worm gear 503 is rotatably connected to one side of the slot 4. The worm gear 503 meshes with the worm 502, converting the rotational motion of the worm into the rotation of the worm gear, which in turn drives the lead screw 504 to rotate. The worm gear transmission has a self-locking characteristic. When the lead screw 504 is locked with the screw hole 602 of the insert block 6, it can prevent the rotating rod 501 from reversing due to vibration, ensuring the long-term stability of the sleeve connection.

[0033] As an embodiment of this utility model, a lead screw 504 is fitted onto one end of the worm gear 503, and a screw hole 602 that meshes with the lead screw 504 is provided on one side of the insert block 6 to form a threaded locking structure. The threaded engagement can apply uniform axial pressure, so that the insert block 6 and the slot 4 fit tightly together. At the same time, the sealing gasket ring 7 is compressed to enhance the sealing of the connection and prevent moisture and dust from entering the sleeve.

[0034] As one embodiment of this utility model, one end of the swivel rod 501 extends to the outside of the connector 2 and is flush with the outer wall of the connector 2, which makes it easy for operators to tighten / loosen the rod directly by hand or with tools without additional disassembly steps, thus improving installation efficiency.

[0035] As an embodiment of this utility model, the sleeve body 1 is further provided with a sealing gasket 7 at one end near the insertion block 6. The sealing gasket 7 near the insertion block 6 is squeezed during sleeve connection, filling the gap between the insertion block 6 and the slot 4 to form a sealing barrier, effectively preventing moisture and dust from entering the sleeve.

[0036] As an embodiment of the present invention, the insert 6 further includes a block 601, the outer wall of which is flush with the inner wall of the slot 4, ensuring that the insert 6 can slide smoothly inside the slot 4.

[0037] As an embodiment of the present invention, the sleeve body 1 further includes an outer layer 101, a lead-free base layer 102 and an inner layer 103. The lead-free base layer 102 is filled between the outer layer 101 and the inner layer 103. The outer layer 101 and the inner layer 103 enclose the lead-free base layer 102, thereby sealing and protecting it.

[0038] Specifically, the working principle of this lead-free, high-toughness PVC electrical conduit is as follows: During use, the insert block 6 of the conduit body 1 is first inserted into the slot 4 inside the pipe hole 3 of the connector 2 to achieve a quick initial connection. At this time, the outer wall of the block 601 on the insert block 6 fits against the inner wall of the slot 4, ensuring smooth sliding. Subsequently, the operator rotates the rotating rod 501 extending to the outside of the connector 2, causing the worm gear 502 mounted on its outer wall to rotate. The worm gear 502 meshes with the worm wheel 503 inside the slot 4, transmitting the rotational motion to the worm wheel 503, which in turn drives the lead screw 504 mounted on one end of the worm wheel 503 to rotate. The lead screw 504 engages with the screw hole 602 on one side of the insert block 6. As the lead screw 504 rotates, it applies uniform axial pressure to the insert block 6, causing the insert block 6 to fit tightly against the slot 4. Simultaneously, it compresses the sealing gasket ring 7 located near the insert block 6, filling the gap and forming a sealing barrier to prevent moisture and dust from entering. Due to the self-locking characteristic of worm gear transmission, once the lead screw 504 is locked with the screw hole 602, it can prevent the rotating rod 501 from reversing due to vibration, ensuring a stable connection. The sleeve body 1 is composed of an outer layer 101, a lead-free base layer 102, and an inner layer 103. The outer layer 101 and the inner layer 103 wrap around the lead-free base layer 102, protecting the lead-free base layer from external corrosion and resisting external impacts with the high toughness of the outer layer. Ultimately, this achieves the functions of quick installation, secure locking, sealing and moisture prevention, and environmental friendliness and durability of the sleeve.

Claims

1. A lead-free, high-toughness PVC electrical conduit, characterized in that, include: A sleeve body (1), one end of which is fitted with a connector (2), the connector (2) has a pipe hole (3) inside, the top of the pipe hole (3) has a slot (4), and the sleeve body (1) has a plug (6) that matches the slot (4) installed at the end away from the connector (2); a locking assembly (5), which is located on one side of the connector (2), includes a rotating rod (501), a worm gear (502), a worm wheel (503) and a lead screw (504).

2. The lead-free, high-toughness PVC electrical conduit according to claim 1, characterized in that, A cavity is provided on one side of the inside of the connector (2). The bottom end of the cavity is connected to the top surface of the slot (4). A rotating rod (501) is rotatably connected inside the cavity. A worm gear (502) is fitted on the outer wall of the rotating rod (501).

3. The lead-free, high-toughness PVC electrical conduit according to claim 2, characterized in that, The slot (4) is rotatably connected to a worm gear (503) on one side inside, and the worm gear (503) meshes with the worm (502).

4. The lead-free, high-toughness PVC electrical conduit according to claim 3, characterized in that, One end of the worm gear (503) is fitted with a lead screw (504), and one side of the insert (6) is provided with a screw hole (602) that meshes with the lead screw (504).

5. The lead-free, high-toughness PVC electrical conduit according to claim 4, characterized in that, One end of the swivel (501) extends to the outside of the connector (2) and is flush with the outer wall of the connector (2).

6. The lead-free, high-toughness PVC electrical conduit according to claim 1, characterized in that, The sleeve body (1) is equipped with a sealing gasket ring (7) at one end near the insertion block (6).

7. The lead-free, high-toughness PVC electrical conduit according to claim 1, characterized in that, The insert (6) includes a block (601), the outer wall of which is flush with the inner wall of the slot (4).

8. The lead-free, high-toughness PVC electrical conduit according to claim 1, characterized in that, The sleeve body (1) includes an outer layer (101), a lead-free base layer (102) and an inner layer (103), with the lead-free base layer (102) filling the space between the outer layer (101) and the inner layer (103).

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