High-performance explosion-proof box for power transmission cable

Abstract

The utility model relates to a high-performance explosion-proof box for a power transmission cable, and aims to solve the problems that the current waterproof mode that two ends of an explosion-proof box are filled with fillers and are wrapped with waterproof composite adhesive tapes for sealing depends on the technical level of operators, and when gaps appear in the filling process of the fillers, the waterproof composite adhesive tapes cannot be used for sealing the two ends of the explosion-proof box. According to the technical scheme, the technical problems that the sealing effect is affected due to the fact that the sealant filled subsequently flows out through a gap, and filling and wrapping are time-consuming and labor-consuming are solved, the single-side sealing device comprises two single-side sealing assemblies which are detachably connected, each single-side sealing assembly comprises a lower shell and an upper shell, and the lower shells are detachably connected with the upper shells. A sealing cavity used for injecting sealant is formed in the lower shell and the upper shell, a flexible filling assembly is detachably installed at one end of the sealing cavity, the problem that the sealant overflows due to gaps of filler can be avoided, the sealing effect is improved, the requirement for the technical level of workers is lowered, operation is easy, and the sealing effect is good. Time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable laying, in particular to a high-performance explosion-proof box for power transmission cables. Background Art

[0002] The explosion-proof junction box is a connection device with explosion-proof and sealing properties for line laying. From the appearance, it is a closed box. When the cable passes through, the cable enters and exits through the locking nut, which effectively avoids the spark phenomenon in the connection. The shell is generally made of aluminum alloy, and in order to make it have better fire resistance and corrosion resistance, aluminum alloy is usually sprayed on its surface.

[0003] After the current explosion-proof box is spliced ​​at the middle joint of the cable, it is still necessary to fill both ends of the explosion-proof box with fillers such as mud plugging, and then wrap and seal both ends with waterproof composite tape, and then inject sealant into the inside of the explosion-proof box through the injection port on it, thereby completing the protection of the middle joint of the cable.

[0004] However, during the assembly process of the explosion-proof box in the prior art, the staff found that the waterproof method of filling the two ends of the explosion-proof box with fillers and sealing it with waterproof composite tape is more dependent on the technical level of the operator. When gaps appear during the filling process, the subsequently injected sealant will flow out through the gaps, affecting the sealing effect, and the filling and wrapping are time-consuming and labor-intensive. In view of this, we propose a high-performance explosion-proof box for transmission cables. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art, meet the actual needs, and provide a high-performance explosion-proof box for power transmission cables to solve the current waterproofing method of filling the two ends of the explosion-proof box with fillers and wrapping them with waterproof composite tape for sealing, which is relatively dependent on the technical level of the operator. When gaps appear during the filling process, the subsequently injected sealant will flow out through the gaps, affecting the sealing effect, and the filling and wrapping are time-consuming and labor-intensive technical problems.

[0006] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing a high-performance explosion-proof box for power transmission cables, including two detachably connected single-side sealing components;

[0007] The single-sided sealing assembly comprises a lower shell and an upper shell, wherein the lower shell is detachably connected to the upper shell, and a sealing cavity for injecting sealant is formed in the lower shell and the upper shell, and a flexible filling assembly for improving the sealing performance of the single-sided sealing assembly and the cable is detachably installed at one end of the sealing cavity;

[0008] The flexible filling component includes an arc-shaped knob tube movably installed in the sealing cavity, a flexible sleeve extending into the sealing cavity is fixedly arranged on one side of the arc-shaped knob tube, and the flexible sleeve has a flexible deformation section that is pulled out of the sealing cavity and a flexible contraction section that is attached to the surface of the cable.

[0009] Preferably, a sealing groove is formed at one end of the lower shell and the upper shell, and two grooves connected to the corresponding sealing grooves are symmetrically formed at the facing ends of the lower shell and the upper shell.

[0010] Preferably, an arcuate sealing strip A for improving the sealing of the two lower shells is installed in the sealing groove, and an arcuate sealing strip B fixedly connected to both ends of the arcuate sealing strip A for improving the sealing of the lower shell and the upper shell is installed in both grooves.

[0011] Preferably, one end of the two lower shells and the two upper shells are each constructed with an arc-shaped end plate, and the two lower shells and the two upper shells are each connected by two corresponding arc-shaped end plate bolts.

[0012] Preferably, arc-shaped extension plates are constructed on both sides of one end of the lower shell and the upper shell, and the lower shell and the upper shell are bolted via two arc-shaped extension plates located on the same side.

[0013] Preferably, an injection port is centrally opened at the top of the upper shell away from the side of the flexible filling component, and an injection end tube is fixedly installed in the injection port, a sealing cover is threadedly installed at the top of the injection end tube, and a plurality of threading ports are opened at the top of the sealing cover.

[0014] Preferably, a threaded ring is configured on a side of the arc-shaped knob tube facing the flexible sleeve, and the threaded ring is threadably mounted in the sealing cavity.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] When the cable is in a sealed state, the two ends of the cable are pulled outwards by the flexible sleeve, and the flexible sleeve is pressed against the cable to prevent it from leaking out.

[0017] 2. The utility model injects sealant into the sealing cavities of the two single-sided sealing components respectively through two injection end tubes. After the sealant is injected, the sealant is shaped with the help of two lower shells, two upper shells and two arc-shaped knob tubes with flexible bundle sleeves, so that it is coated on the surface of the cable middle joint after solidification, and the wiring harness for arranging the sensor can pass through the threading port on the sealing cover. The cooperation between the sealing cover and the injection end tube can realize the protection of the sealant after the arrangement is completed, thereby further improving the performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the single-side sealing component in the utility model in a disassembled state;

[0021] Figure 4 It is a structural schematic diagram used to show the disassembly state of the upper shell and the sealing cover in the present utility model;

[0022] Figure 5 It is a cross-sectional view of the flexible filling component in the utility model.

[0023] In the figure: 1. Single-side sealing assembly; 101. Lower shell; 102. Upper shell; 103. Sealing chamber; 104. Arc-shaped end plate; 105. Arc-shaped extension plate; 106. Sealing groove; 107. Arc-shaped sealing strip A; 108. Arc-shaped sealing strip B; 109. Injection end tube; 110. Sealing cover; 111. Threading port; 2. Flexible filling assembly; 201. Arc-shaped knob tube; 202. Flexible bundle sleeve; 203. Flexible deformation section; 204. Flexible contraction section; 205. Threaded ring. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Example 1: A high performance explosion-proof box for power transmission cables, see Figure 1 , comprising two detachably connected single-side sealing components 1;

[0026] Furthermore, in order to avoid the problem of sealant overflowing due to gaps in the filler and to improve the sealing effect, see Figure 1 , Figure 2 , Figure 3 , Figure 5The single-side sealing component 1 includes a lower shell 101 and an upper shell 102, wherein the lower shell 101 is detachably connected to the upper shell 102, and a sealing cavity 103 for injecting sealant is formed in the lower shell 101 and the upper shell 102, and a flexible filling component 2 for improving the sealing performance of the single-side sealing component 1 and the cable is detachably installed at one end of the sealing cavity 103, and the flexible filling component 2 includes an arc-shaped knob tube 201 movably installed in the sealing cavity 103, and the arc-shaped knob tube 201 is rotatable toward A threaded ring 205 is constructed on one side of the flexible sleeve 202, and the threaded ring 205 is threadedly installed in the sealed cavity 103. A flexible sleeve 202 extending into the sealed cavity 103 is fixedly arranged on one side of the arc-shaped knob tube 201. The flexible sleeve 202 has a flexible deformation section 203 that moves out of the sealed cavity 103 under tension and a flexible contraction section 204 that is attached to the surface of the cable. The protection of the intermediate joint of the cable is achieved by the combination of the two lower shells 101 and the two upper shells 102. The two flexible filling components 2 sleeved on the cable are pulled toward the lower shell 101 and screwed into the sealed cavity 103. When the arc-shaped knob tube 201 with the flexible bundle sleeve 202 moves, the flexible bundle sleeve 202 sleeved on the cable will be affected by the pulling force and bulge to the side away from the sealed cavity 103, and the end of the flexible contracting section 204 away from the arc-shaped knob tube 201 will be deformed and pulled by the flexible deformation section 203 and flipped, so that one end of the flexible contracting section 204 on the flexible bundle sleeve 202 further abuts against the cable. The surface of the cable cooperates with the flexible deformation section 203 on the flexible sleeve 202 to protrude outward to ensure the abutment force of the flexible contracting section 204 on the flexible sleeve 202 against the cable, so that when the sealant is injected later, the sealant solidified in the sealing cavity 103 forms pressure on the flexible contracting section 204 on the flexible sleeve 202 outside, avoiding the problem of sealant overflowing due to gaps in the filler, improving the sealing effect, and reducing the requirements on the technical level of the staff. It is simple to operate and saves time and effort.

[0027] Furthermore, in order to improve the sealing performance of the two lower shells 101 and the two upper shells 102 after being assembled, see Figure 1 , Figure 2 , Figure 3, one end of the two lower shells 101 and the two upper shells 102 are both constructed with an arc-shaped end plate 104, and the two lower shells 101 and the two upper shells 102 are both bolted together by the corresponding two arc-shaped end plates 104, both sides of one end of the lower shell 101 and the upper shell 102 are both constructed with an arc-shaped extension plate 105, and the lower shell 101 and the upper shell 102 are bolted together by the two arc-shaped extension plates 105 located on the same side, one end of the lower shell 101 and the upper shell 102 is provided with a sealing groove 106, and the facing ends of the lower shell 101 and the upper shell 102 are both symmetrically provided with two grooves connected to the corresponding sealing groove 106, and the sealing groove 106 is installed with an arc-shaped sealing strip A10 for improving the sealing performance of the two lower shells 101 7, and the two grooves are both installed with arcuate sealing strips B108 fixedly connected to the two ends of the arcuate sealing strip A107 for improving the sealing performance of the lower shell 101 and the upper shell 102, the two lower shells 101 and the two upper shells 102 are connected to each other through the two arcuate end plates 104 arranged thereon, and after the connection is completed, the two lower shells 101 and the two upper shells 102 are respectively connected through the two arcuate extension plates 105 arranged thereon, so that the splicing of the two lower shells 101 and the two upper shells 102 can be completed, and after the splicing is completed, the four arcuate sealing strips A107 and the eight arcuate sealing strips B108 arranged in the two lower shells 101 and the two upper shells 102 will abut against each other, thereby improving the sealing performance of the two lower shells 101 and the two upper shells 102 after splicing.

[0028] Furthermore, to further improve the performance of the device, see Figure 1 , Figure 3 , Figure 4 An injection port is provided at the center of the top of the upper shell 102 away from the side of the flexible filling component 2, and an injection end tube 109 is fixedly installed in the injection port, a sealing cover 110 is threadedly installed at the top of the injection end tube 109, and a plurality of threading ports 111 are provided at the top of the sealing cover 110, and sealant is respectively injected into the sealing cavity 103 of the two single-sided sealing components 1 through the two injection end tubes 109. After the sealant is injected, the sealant is shaped with the help of the two lower shells 101, the two upper shells 102 and the two arc-shaped knob tubes 201 with flexible bundle sleeves 202, so that it is covered on the surface of the cable middle joint after solidification, and the wiring harness for arranging the sensor can pass through the threading port 111 on the sealing cover 110. The cooperation between the sealing cover 110 and the injection end tube 109 can realize the protection of the sealant after the arrangement is completed, thereby further improving the performance of the device.

[0029] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A high performance explosion-proof box for power transmission cables, characterized in that: It comprises two detachably connected single-side sealing components (1); The single-sided sealing component (1) comprises a lower shell (101) and an upper shell (102), wherein the lower shell (101) is detachably connected to the upper shell (102), and a sealing cavity (103) for injecting sealant is formed in the lower shell (101) and the upper shell (102), and a flexible filling component (2) for improving the sealing performance between the single-sided sealing component (1) and the cable is detachably installed at one end of the sealing cavity (103); The flexible filling component (2) comprises an arc-shaped knob tube (201) movably mounted in a sealed cavity (103), a flexible sleeve (202) extending into the sealed cavity (103) being fixedly arranged on one side of the arc-shaped knob tube (201), the flexible sleeve (202) comprising a flexible deformation section (203) that is pulled and moved out of the sealed cavity (103) and a flexible contraction section (204) that is attached to the surface of the cable.

2. The high performance explosion-proof box for power transmission cables according to claim 1, characterized in that: One end of the lower shell (101) and the upper shell (102) is provided with a sealing groove (106), and the facing ends of the lower shell (101) and the upper shell (102) are symmetrically provided with two grooves connected to the corresponding sealing grooves (106).

3. The high performance explosion-proof box for power transmission cables according to claim 2, characterized in that: An arcuate sealing strip A (107) for improving the sealing performance of the two lower shells (101) is installed in the sealing groove (106), and an arcuate sealing strip B (108) fixedly connected to both ends of the arcuate sealing strip A (107) for improving the sealing performance of the lower shell (101) and the upper shell (102) is installed in both grooves.

4. The high performance explosion-proof box for power transmission cables according to claim 1, characterized in that: One end of the two lower shells (101) and the two upper shells (102) are both constructed with an arc-shaped end plate (104), and the two lower shells (101) and the two upper shells (102) are both bolted together via the corresponding two arc-shaped end plates (104).

5. The high performance explosion-proof box for power transmission cables according to claim 1, characterized in that: Both sides of one end of the lower shell (101) and the upper shell (102) are constructed with arc-shaped extension plates (105), and the lower shell (101) and the upper shell (102) are bolted together via two arc-shaped extension plates (105) located on the same side.

6. The high performance explosion-proof box for power transmission cables according to claim 1, characterized in that: An injection port is centrally provided at the top of the upper shell (102) on a side away from the flexible filling component (2), and an injection end tube (109) is fixedly installed in the injection port. A sealing cover (110) is threadedly installed at the top of the injection end tube (109), and a plurality of threading ports (111) are provided at the top of the sealing cover (110).

7. The high performance explosion-proof box for power transmission cables according to claim 1, characterized in that: A threaded ring (205) is configured on one side of the arc-shaped knob tube (201) facing the flexible sleeve (202), and the threaded ring (205) is threadably mounted in the sealing cavity (103).

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