Explosion-proof box for power cable engineering

Abstract

The utility model provides an explosion-proof box for power cable engineering, the explosion-proof box is internally provided with a sealing cavity, the sealing cavity is internally provided with a thermal expansion mechanism located at a cable joint, the outer wall of the explosion-proof box is also internally provided with a conductive cavity concentric with the sealing cavity, and the outer wall of the explosion-proof box is provided with an injection pipe penetrating through the sealing cavity. The interior of the sealing cavity is filled with a sealing medium from the injection pipe, and the outer wall of the explosion-proof box is provided with a grounding pipe penetrating through the conductive cavity. When explosion prevention is carried out, the joint of the cable is heated, the thermal expansion mechanism is heated to expand outwards, the thermal expansion mechanism pierces the sealing medium in the sealing cavity and inserts the sealing medium into the conductive medium in the conductive cavity, the grounding wire can be connected with the joint of the cable through the conductive medium and the thermal expansion mechanism, and grounding protection is carried out on the joint of the cable. The subsequent continuous current of the cable is led into the ground through the grounding lead, thereby realizing grounding protection, and preventing continuous input of the current in the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power engineering, in particular to an explosion-proof box for electric power cable engineering. Background Art

[0002] During the power transmission process, cable joints are an essential part; all power users need to use cable joints to draw power lines from the main cable to obtain the required electric energy. When a short circuit occurs in the circuit, the connection part of the cable becomes the weakest link in the whole circuit. People will set an explosion-proof box at the connection part of the cable for protection. However, when the existing explosion-proof boxes are used for protection, they all adopt the method of sealing and isolation for protection. However, the connection part of the cable is prone to continuous heat generation and explosion due to continuous current conduction. Therefore, an explosion-proof box for electric power cable engineering is proposed. Content of the Utility Model

[0003] To solve the above at least one technical defect, the utility model provides an explosion-proof box for electric power cable engineering, including: an explosion-proof box is provided at the connection part of the cable. A sealing cavity is arranged inside the explosion-proof box. A thermal expansion mechanism located at the cable connection part is arranged inside the sealing cavity. A conductive cavity concentric with the sealing cavity is also arranged inside the outer wall of the explosion-proof box. An injection pipe penetrating through the sealing cavity is arranged on the outer wall of the explosion-proof box. A sealing medium is filled in the sealing cavity from the injection pipe. A grounding pipe penetrating through the conductive cavity is arranged on the outer wall of the explosion-proof box. A conductive medium is filled in the conductive cavity from the grounding pipe. A grounding wire is threadedly connected inside the grounding pipe.

[0004] Further, threaded heads are arranged at both ends of the explosion-proof box. A threaded cylinder is threadedly connected to the threaded head. A sealing ring located at the end of the threaded head is arranged inside the threaded cylinder.

[0005] Further, a metal ball is arranged at the end of the grounding wire. The outer wall of the metal ball is copper-plated.

[0006] Further, the thermal expansion mechanism includes a memory metal arc piece with a C-shaped cross-section. A plurality of puncture needles are evenly arranged on the outer wall of the memory metal arc piece. The length of the puncture needle is less than the thickness of the sealing cavity.

[0007] Further, the sealing medium is epoxy resin.

[0008] Further, the conductive medium is conductive silver paste.

[0009] Further, a sealing cover is threadedly connected to the outer end of the injection pipe. Advantageous Effects

[0010] During explosion protection, the connection of the cable gets hot, causing the thermal expansion mechanism to expand outwards due to heat. The thermal expansion mechanism pierces the sealing medium inside the sealing cavity and inserts it into the conductive medium inside the conductive cavity, enabling the grounding wire to be connected to the connection of the cable through the conductive medium and the thermal expansion mechanism. This provides grounding protection for the connection of the cable, ensuring that the subsequent continuous current of the cable is introduced into the ground through the grounding wire, achieving grounding protection and preventing the continuous input of current in the cable.

[0011] When installing the explosion-proof box, first string the threaded cylinder and the sealing ring onto both ends of the cable. Insert one end of the cable through one end of the threaded head and penetrate the entire explosion-proof box. Then connect the two ends of the cable together. Next, move the connection of the cable into the interior of the explosion-proof box, move the sealing ring to the end of the threaded head, tighten the threaded cylinder onto the threaded head, and then inject the sealing medium through the injection pipe so that the sealing medium fills the entire sealing cavity. Then inject the conductive medium into the conductive cavity through the grounding pipe, install the grounding wire at the grounding pipe, and bury the other end of the grounding wire into the soil.

[0012] The realization, functional characteristics, and advantages of the present utility model will be further described in conjunction with embodiments and with reference to the accompanying drawings. Description of the Drawings

[0013] Figure 1 Isometric view of the whole of the present utility model.

[0014] Figure 2 Axial sectional view of the whole of the present utility model.

[0015] Figure 3 Isometric view of the threaded cylinder of the present utility model.

[0016] Figure 4 Isometric view of the threaded head of the present utility model.

[0017] Figure 5 Isometric view of the thermal expansion mechanism of the present utility model.

[0018] In Figures 1 to 5 , the corresponding relationship between the component names or lines and the drawing reference numbers is as follows: cable 1, explosion-proof box 2, injection pipe 201, grounding pipe 202, sealing cavity 203, conductive cavity 204, threaded head 205, sealing ring 206, threaded cylinder 207, thermal expansion mechanism 3, memory metal arc piece 301, puncture needle 302, grounding wire 4, metal ball 401. Detailed Description of the Embodiment

[0019] Please refer to Figures 1 to 5 ;

[0020] This embodiment provides an explosion-proof box for a power cable project. Refer to Figure 1 andFigure 2 , including: an explosion-proof box 2 is provided at the connection of the cable 1. A sealing cavity 203 is provided inside the explosion-proof box 2. A thermal expansion mechanism 3 located at the connection of the cable 1 is provided inside the sealing cavity 203. A conductive cavity 204 concentric with the sealing cavity 203 is also provided inside the outer wall of the explosion-proof box 2. An injection pipe 201 penetrating the sealing cavity 203 is provided on the outer wall of the explosion-proof box 2. The inside of the sealing cavity 203 is filled with a sealing medium from the injection pipe 201. A grounding pipe 202 penetrating the conductive cavity 204 is provided on the outer wall of the explosion-proof box 2. The inside of the conductive cavity 204 is filled with a conductive medium from the grounding pipe 202. A grounding wire 4 is threadedly connected inside the grounding pipe 202;

[0021] During specific implementation, when explosion-proof is carried out, the connection of the cable 1 generates heat, causing the thermal expansion mechanism 3 to expand outwardly when heated, piercing the sealing medium inside the sealing cavity 203 and inserting it into the conductive medium inside the conductive cavity 204, enabling the grounding wire 4 to be connected to the connection of the cable 1 through the conductive medium and the thermal expansion mechanism 3, providing grounding protection for the connection of the cable 1, and causing the subsequent continuous current of the cable 1 to be introduced into the ground through the grounding wire 4, achieving grounding protection and avoiding the continuous input of current in the cable 1.

[0022] Further, referring to Figures 2 to 4 , threaded heads 205 are provided at both ends of the explosion-proof box 2. A threaded cylinder 207 is threadedly connected to the threaded head 205. A sealing ring 206 located at the end of the threaded head 205 is provided inside the threaded cylinder 207;

[0023] During specific implementation, when installing the explosion-proof box 2, first string the threaded cylinder 207 and the sealing ring 206 onto both ends of the cable 1. Insert one end of the cable 1 through one end of the threaded head 205 and penetrate the entire explosion-proof box 2. Then connect both ends of the cable 1 together. Next, move the connection of the cable 1 to the inside of the explosion-proof box 2, move the sealing ring 206 to the end of the threaded head 205, tighten the threaded cylinder 207 onto the threaded head 205, then inject the sealing medium from the inside of the injection pipe 201 to fill the entire sealing cavity 203 with the sealing medium. Inject the conductive medium from the grounding pipe 202 into the inside of the conductive cavity 204. Then install the grounding wire 4 at the grounding pipe 202, and bury the other end of the grounding wire 4 into the soil.

[0024] Further, a metal ball 401 is provided at the end of the grounding wire 4, and the outer wall of the metal ball 401 is copper-plated;

[0025] During specific implementation, through the setting of the metal ball 401, the contact area between the grounding wire 4 and the soil can be increased, and the metal ball 401 can be corrosion-proofed through the copper-plated outer wall setting.

[0026] Further, referring to Figure 5, the thermal expansion mechanism 3 includes a memory metal arc piece 301 with a C-shaped cross-section. A number of puncture needles 302 are evenly arranged on the outer wall of the memory metal arc piece 301, and the length of the puncture needles 302 is less than the thickness of the sealing cavity 203;

[0027] During specific implementation, when explosion protection is carried out, the connection of the cable 1 generates heat. When the temperature reaches 90 °C, the sealing medium softens. At the same time, the memory metal arc piece 301 expands outwards due to heat, causing the puncture needles 302 to pierce through the sealing medium and the outer wall of the sealing cavity 203 and insert into the interior of the conductive cavity 204, so that the grounding circuit of the grounding wire 4 is connected to conduct grounding protection.

[0028] Furthermore, the sealing medium is epoxy resin;

[0029] During specific implementation, the sealing medium made of epoxy resin is injected from the injection pipe 201, so that the connection of the cable 1 and the thermal expansion mechanism 3 in the interior of the sealing cavity 203 are sealed as a whole.

[0030] Furthermore, the conductive medium is conductive silver paste;

[0031] During specific implementation, the conductive medium made of conductive silver paste is injected from the grounding pipe 202, so that the conductive cavity 204 is filled with conductive silver paste. After the puncture needles 302 pierce into the interior of the conductive cavity 204, the puncture needles 302 contact the conductive silver paste to conduct electricity, so that the grounding wire 4 is connected, and at this time, grounding protection is carried out on the cable 1.

[0032] Furthermore, a sealing cover is provided at the outer end of the injection pipe 201 through threaded connection;

[0033] During specific implementation, due to the setting of the sealing cover, rainwater is prevented from entering through the injection pipe 201.

Claims

1. An explosion-proof box for a power cable project, comprising: An explosion-proof box (2) is provided at the connection of the cable (1), and its characteristics are as follows: A sealing cavity (203) is provided inside the explosion-proof box (2), and a thermal expansion mechanism (3) located at the connection of the cable (1) is provided inside the sealing cavity (203). A conducting cavity (204) concentric with the sealing cavity (203) is also provided inside the outer wall of the explosion-proof box (2). An injection pipe (201) penetrating the sealing cavity (203) is provided on the outer wall of the explosion-proof box (2). The inside of the sealing cavity (203) is filled with a sealing medium from the injection pipe (201). A grounding pipe (202) penetrating the conducting cavity (204) is provided on the outer wall of the explosion-proof box (2). The inside of the conducting cavity (204) is filled with a conducting medium from the grounding pipe (202). A grounding wire (4) is threadedly connected inside the grounding pipe (202).

2. The explosion-proof box for a power cable project according to claim 1, wherein: Threaded heads (205) are provided at both ends of the explosion-proof box (2), and threaded barrels (207) are threadedly connected to the threaded heads (205). A sealing ring (206) located at the end of the threaded head (205) is provided inside the threaded barrel (207).

3. The explosion-proof box for a power cable project according to claim 2, wherein: A metal ball (401) is provided at the end of the grounding wire (4), and the outer wall of the metal ball (401) is copper-plated.

4. The explosion-proof box for a power cable project according to claim 3, characterized in that: The thermal expansion mechanism (3) includes a memory metal arc piece (301) with a C-shaped cross-section. A number of puncture needles (302) are evenly provided on the outer wall of the memory metal arc piece (301), and the length of the puncture needles (302) is less than the thickness of the sealing cavity (203).

5. The explosion-proof box for a power cable project according to claim 4, wherein: The sealing medium is epoxy resin.

6. The explosion-proof box for a power cable project according to claim 5, characterized in that: The conducting medium is conductive silver paste.

7. The explosion-proof box for a power cable project according to claim 6, characterized in that: A sealing cap is threadedly connected to the outer end of the injection pipe (201).

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