Cable sheath protection grounding box

Abstract

The utility model relates to a cable sheath protection grounding box, including box and box cover, be equipped with electrical protection subassembly in the box, have the through -hole on the box, be equipped with the wire inlet cylinder in the through -hole, the wire inlet cylinder includes locking ring, outer tube and with the inner tube of outer tube helical connection, locking ring is made of flexible material, locking ring includes even section and uneven section, even section is located the inner side of outer tube and is connected with the inner tube, locking ring surpasses the front end of outer tube and makes uneven section to set up in the outer side of outer tube, the ring width of uneven section gradually becomes big from the one end close to even section to the one end away from even section, the rotation inner tube can bring uneven section into outer tube, the utility model discloses after the cable is stretched into the box and completes the wiring, through the rotation inner tube, uneven section of locking ring is brought into outer tube, locking ring will enter the gap between cable and outer tube, fixes cable, and locking ring can also strengthen the airtightness of the inside space of box.

Description

Technical Field

[0001] This utility model relates to the field of power, specifically to a cable sheath protection grounding box. Background Technology

[0002] In power transmission systems, cable sheath protection grounding boxes are used to protect the metal sheath of cables, ensuring their safety and reliability under normal operation and fault conditions.

[0003] When using existing cable sheath protection grounding boxes, the cable enters the box through the through hole. After being left for a long time, a bend will form at the through hole. In addition, due to the influence of the cable's own weight, the cable will exert a pulling force on the terminal block, which may cause the cable to detach from the terminal block in severe cases. Utility Model Content

[0004] To solve the above problems, this utility model proposes a cable sheath protection grounding box, the specific technical solution of which is as follows:

[0005] A cable sheath protection grounding box includes a box body and a box cover. The box body is equipped with electrical protection components. The box body has a through hole, and an inlet cylinder is installed in the through hole. The inlet cylinder includes a locking ring, an outer cylinder, and an inner cylinder that is spirally connected to the outer cylinder. The locking ring is made of flexible material and includes a uniform section and a non-uniform section. The uniform section is located inside the outer cylinder and connected to the inner cylinder. The locking ring extends beyond the front end of the outer cylinder so that the non-uniform section is fitted on the outside of the outer cylinder. The ring width of the non-uniform section gradually increases from the end closer to the uniform section to the end farther away from the uniform section. Rotating the inner cylinder can bring the non-uniform section into the outer cylinder.

[0006] Furthermore, the electrical protection assembly includes a first insulating plate, a second insulating plate, and a conductive sheet; a first outer conductor clamp, a second outer conductor clamp, and a third outer conductor clamp are installed on the first insulating plate, and a first inner conductor clamp, a second inner conductor clamp, and a third inner conductor clamp are installed on the second insulating plate. The first outer conductor clamp and the second inner conductor clamp are connected by a copper busbar, the second outer conductor clamp and the third inner conductor clamp are connected by a copper busbar, and the third outer conductor clamp and the first inner conductor clamp are connected by a copper busbar; a sheath protector is provided on the rear side of each inner conductor clamp, and the other end of each sheath protector is installed on the conductive sheet, which is also equipped with a grounding terminal.

[0007] Furthermore, a first rolling ball is provided on the front end face of the outer cylinder, and a second rolling ball is provided on the outer circumferential surface of the outer cylinder.

[0008] Furthermore, there are three inlet tubes, located on the front side of the three outer conductor clamps respectively.

[0009] Furthermore, a slider is provided on the end face of the non-uniform section away from the uniform section, and a groove is provided on the outer circumferential surface of the outer cylinder to cooperate with the slider; the uniform section and the inner cylinder are rotatably connected.

[0010] Furthermore, the locking ring is made of rubber.

[0011] The beneficial effects of this utility model are as follows:

[0012] After the cable is inserted into the enclosure and the wiring is completed, the uneven section of the locking ring is brought into the outer cylinder by rotating the inner cylinder. The locking ring will enter the gap between the cable and the outer cylinder, thus fixing the cable. At the same time, the locking ring can also enhance the airtightness of the internal space of the enclosure. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a perspective view of the cable sheath protection grounding box described in this utility model;

[0015] Figure 2 This is a top view of the cable sheath protection grounding box described in this utility model;

[0016] Figure 3 This is a perspective view of the cable inlet cylinder described in this utility model;

[0017] Figure 4 This is a cross-sectional view of the inlet cylinder described in this utility model;

[0018] Figure 5 This is a wiring diagram of the cable sheath protection grounding box described in this utility model.

[0019] In the diagram: 1. Box body; 2. Box cover; 3. Grounding terminal; 4. Inlet tube; 4.1. Locking ring; 4.11. Non-uniform section; 4.12. Uniform section; 4.2. Outer tube; 4.3. Inner tube; 4.4. Slider; 4.5. Slide groove; 4.6. First rolling ball; 4.7. Second rolling ball; 5. Sheath protector; 6. First insulating plate; 7. First outer conductor clamp; 8. Second outer conductor clamp; 9. Third outer conductor clamp; 10. Second insulating plate; 11. First inner conductor clamp; 12. Second inner conductor clamp; 13. Third inner conductor clamp; 14. Conductive sheet; 15. Cable. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] The present invention provides the following embodiments:

[0022] like Figure 1-4 As shown, this utility model provides a cable sheath protection grounding box, including a box body 1 and a box cover 2, which are rotatably connected. An electrical protection component is installed inside the box body 1. A through hole is opened on the box body 1, and an inlet cylinder 4 is installed inside the through hole. The inlet cylinder 4 includes a locking ring 4.1, an outer cylinder 4.2, and an inner cylinder 4.3 spirally connected to the outer cylinder 4.2. The outer cylinder 4.2 is welded to the box body 1. The locking ring 4.1 is made of flexible material and includes a uniform section 4.12 and a non-uniform section 4.11. The uniform section 4.12 is cylindrical with a circular cross-section, and the non-uniform section 4.11 is frustum-shaped with a coaxial hole. The uniform section 4.12 is located inside the outer cylinder 4.2 and connected to the inner cylinder 4.3. The locking ring 4.1 passes over the front end of the outer cylinder 4.2 and fits the non-uniform section 4.11 on the outside of the outer cylinder 4.2. The ring width of the non-uniform section 4.11 gradually increases from the end closer to the uniform section 4.12 to the end farther away from the uniform section 4.12. Rotating the inner cylinder 4.3 can bring the non-uniform section 4.11 into the outer cylinder 4.2.

[0023] Furthermore, the electrical protection assembly includes a first insulating plate 6, a second insulating plate 10, and a conductive sheet 14. The first insulating plate 6 and the second insulating plate 10 are both installed inside the housing 1 using screws, and the conductive sheet 14 is installed inside the housing 1 via a third insulating plate. A first outer conductor clamp 7, a second outer conductor clamp 8, and a third outer conductor clamp 9 are installed on the first insulating plate 6. A first inner conductor clamp 11, a second inner conductor clamp 12, and a third inner conductor clamp 13 are installed on the second insulating plate 10. The first outer conductor clamp 7 is located within the first inner conductor clamp 11. On the front side, the second outer conductor clamp 8 is located on the front side of the second inner conductor clamp 12, and the third outer conductor clamp 9 is located on the front side of the third inner conductor clamp 13. The first outer conductor clamp 7 and the second inner conductor clamp 12 are connected by a copper busbar, the second outer conductor clamp 8 and the third inner conductor clamp 13 are connected by a copper busbar, and the third outer conductor clamp 9 and the first inner conductor clamp 11 are connected by a copper busbar. Each inner conductor clamp is provided with a sheath protector 5 on its rear side. The other end of the sheath protector 5 is installed on a conductive sheet 14, and a grounding terminal 3 is also installed on the conductive sheet 14.

[0024] Furthermore, a first ball 4.6 is provided on the front end face of the outer cylinder 4.2, and a second ball 4.7 is provided on the outer circumferential surface of the outer cylinder 4.2. The first ball 4.6 is provided to make rolling friction contact between the front end face of the outer cylinder 4.2 and the locking ring 4.1, and the second ball 4.7 makes rolling friction contact between the outer circumferential surface of the outer cylinder 4.2 and the locking ring 4.1, which makes it easier for the locking ring 4.1 to move.

[0025] Furthermore, there are three inlet cylinders 4, located on the front side of the three outer conductor clamps respectively.

[0026] Furthermore, a slider 4.4 is provided on the end face of the non-uniform segment 4.11 away from the uniform segment 4.12, and a groove 4.5 that mates with the slider 4.4 is provided on the outer circumferential surface of the outer cylinder 4.2; the uniform segment 4.12 and the inner cylinder 4.3 are rotatably connected and axially constrained. Specifically, a rotating block is fixedly connected to the front end of the uniform segment 4.12. The rotating block and the inner cylinder 4.3 can rotate relative to each other but cannot move relative to each other along the axial direction. The rotating block and the inner cylinder 4.3 are in smooth contact, so that when the inner cylinder 4.3 is rotated, the uniform segment 4.12 makes linear motion, thereby making the movement of the locking ring 4.1 more stable.

[0027] Furthermore, the locking ring 4.1 is made of rubber.

[0028] like Figure 5As shown, after the cable 15 is inserted into the housing 1 to complete the wiring, the uneven section 4.11 of the locking ring 4.1 is brought into the outer housing 4.2 by rotating the inner cylinder 4.3. The uneven section 4.11 of the locking ring 4.1 will penetrate into the gap between the cable 15 and the outer cylinder 4.2, thus fixing the cable 15. At this time, there will still be friction between the locking ring 4.1 and the cable, preventing the cable from slipping outward. At the same time, since the locking ring 4.1 fills the gap between the front end of the inner cylinder 4.3 and the cable 15, it can also enhance the airtightness of the internal space of the housing 1. In addition, it can also accommodate cables of different diameters.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cable sheath protection grounding box, comprising a box body and a box cover, wherein an electrical protection component is provided inside the box body, characterized in that: The housing has a through hole, and an inlet cylinder is installed inside the through hole. The inlet cylinder includes a locking ring, an outer cylinder, and an inner cylinder that is spirally connected to the outer cylinder. The locking ring is made of flexible material and includes a uniform section and a non-uniform section. The uniform section is located inside the outer cylinder and connected to the inner cylinder. The locking ring extends beyond the front end of the outer cylinder so that the non-uniform section is fitted onto the outside of the outer cylinder. The ring width of the non-uniform section gradually increases from the end closer to the uniform section to the end farther away from the uniform section. The locking ring is made of rubber. Rotating the inner cylinder can bring the non-uniform section into the outer cylinder. A slider is provided on the end face of the non-uniform section away from the uniform section. A groove that mates with the slider is provided on the outer circumference of the outer cylinder. The uniform section and the inner cylinder are rotatably connected.

2. The cable sheath protection grounding box according to claim 1, characterized in that: The electrical protection assembly includes a first insulating plate, a second insulating plate, and a conductive sheet. The first insulating plate is equipped with a first outer conductor clamp, a second outer conductor clamp, and a third outer conductor clamp. The second insulating plate is equipped with a first inner conductor clamp, a second inner conductor clamp, and a third inner conductor clamp. The first outer conductor clamp and the second inner conductor clamp are connected by copper busbars, the second outer conductor clamp and the third inner conductor clamp are connected by copper busbars, and the third outer conductor clamp and the first inner conductor clamp are connected by copper busbars. Each inner conductor clamp has a sheath protector on its rear side, and the other end of each sheath protector is mounted on a conductive sheet. A grounding terminal is also mounted on the conductive sheet.

3. The cable sheath protection grounding box according to claim 1, characterized in that: The front end face of the outer cylinder is provided with a first rolling ball, and the outer circumferential surface of the outer cylinder is provided with a second rolling ball.

4. The cable sheath protection grounding box according to claim 2, characterized in that: There are three inlet tubes, located in front of the three outer conductor clamps.

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