A cable explosion-proof box

Abstract

The invention discloses a cable explosion-proof box, which relates to the technical field of cable laying, and comprises an upper shell, a lower shell is fixed at the bottom of the upper shell, a sealing rubber bag is arranged in the middle of the inner side of the upper shell and the lower shell, and a secondary explosion-proof component for explosion-proof is arranged in the middle of the inner side of the upper shell and the lower shell; wherein the secondary explosion-proof component performs explosion-proof on the cable joint, and when the cable is short-circuited, the secondary explosion-proof component discharges the glue in the sealing rubber bag to the cable joint for secondary explosion-proof; a card block is fixed at the middle of the inner side of the upper shell and the lower shell at the position of the sealing rubber bag; the secondary explosion-proof component comprises a guide rod fixed on the inner side of the upper shell near the position of the sealing rubber bag, and sliders are slidably connected on both sides of the guide rod; through the use of the secondary explosion-proof component, when the sealant melts, the glue in the sealing rubber bag can be discharged to the outside of the cable joint again, so that the cable joint will not contact with the air, thereby hindering the occurrence of explosion.

Description

Technical Field

[0001] The invention relates to the technical field of cable laying, in particular to a cable explosion-proof box. Background Art

[0002] Cable laying refers to the process of laying and installing cables along the surveyed route to form a cable line. According to the application occasion, it can be divided into several laying methods such as overhead, underground (pipeline and direct burial), underwater, wall and tunnel. Reasonable selection of cable laying method is very important to ensure the transmission quality, reliability and construction and maintenance of the line; long-distance communication cables are generally laid directly in order to ensure safe and reliable communication. In-city trunk cables (relay and user trunk cables) are generally laid in pipelines to ensure safe and reliable communication, convenient installation and replacement, and beautiful city appearance. In-city wiring cables can be laid overhead and on walls. With the development of modern urban construction, they will gradually be replaced by pipeline laying.

[0003] When laying cables, it is necessary to add explosion-proof boxes to the cable joints to prevent explosions when the cable joints are short-circuited. The existing cable explosion-proof boxes use sealants that are added to the outside of the cable joints during installation and solidified. Although this can achieve an explosion-proof effect, when the cable joints are short-circuited, heat is generated to melt the sealants, which may cause the cable joints to come into contact with the air and cause an explosion. Summary of the invention

[0004] The object of the present invention is to provide a cable explosion-proof box to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a cable explosion-proof box, comprising an upper shell, a lower shell is fixed to the bottom of the upper shell, a sealing rubber bag is provided in the middle of the inner side of the upper shell and the lower shell, and a secondary explosion-proof component for explosion-proof is provided in the middle of the inner side of the upper shell and the lower shell;

[0006] Among them, the secondary explosion-proof component provides explosion-proof for the cable joint. When the cable is short-circuited, the secondary explosion-proof component discharges the glue in the sealing plastic bag to the cable joint for secondary explosion-proof.

[0007] Furthermore, a clamping block is fixed at the middle of the inner side of the upper shell and the lower shell at the position of the sealing rubber bag.

[0008] Furthermore, the secondary explosion-proof component includes a guide rod fixed on the inner side of the upper shell body near the position of the sealing rubber bag, sliders are slidably connected on both sides of the guide rod, a compression piece is connected between one side of the slider and one end of the inner side of the upper shell body, a joint cover is connected between the two sliders, the two joint covers are located at the outer side of the cable connector, a sealing block for wrapping the cable connector is provided between the two joint covers, a cutting knife for cutting the bottom of the sealing rubber bag is fixed on the top of the slider, and the structure of the secondary explosion-proof component in the lower shell body is the same as the structure of the secondary explosion-proof component in the upper shell body.

[0009] Furthermore, the guide rod includes a top rod arranged to fit the sealing rubber bag, a low rod is connected between the two ends of the top rod and the two ends of the inner side of the upper shell, a transition slide is connected between the low rod and the top rod, the compression piece is located outside the low rod, the length of the sealing rubber block is greater than the length of the top rod, and in an initial state, the slider is located outside the low rod and the scratcher does not contact the bottom of the sealing rubber bag.

[0010] Furthermore, a ball bearing is provided on the inner side of the sliding block, the transition slide is inclined, and the connection between the top rod and the lower rod and the transition slide are all rounded.

[0011] Furthermore, a cable opening is provided in the middle of the connector cover, and the outer side of the connector cover is semicircular.

[0012] Furthermore, the upper shell and the lower shell are fixed by bolts, and fixing rings are fixed at the ends of the upper shell and the lower shell.

[0013] Compared with the prior art, the beneficial effect achieved by the present invention is that through the use of the secondary explosion-proof component, when the sealant melts, the glue in the sealing bag can be discharged to the outside of the cable joint again, so that the cable joint will not come into contact with the air, thereby preventing the occurrence of explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of a cable explosion-proof box according to the patent of the present invention;

[0016] Figure 2 This is a side view of a cable explosion-proof box pulping device according to the patent of the present invention;

[0017] Figure 3 This is a cable explosion-proof box pulping device patented by the invention Figure 2 Half section view at the middle edge AA;

[0018] Figure 4This is a schematic diagram of the structure of a secondary explosion-proof component of a cable explosion-proof box pulping device in the patent of the present invention;

[0019] Figure 5 It is a structural schematic diagram of a guide rod of a cable explosion-proof box pulping device in the patent of the present invention.

[0020] Markings in the accompanying drawings:

[0021] 1. Upper shell;

[0022] 2. Lower shell;

[0023] 3. Sealed plastic bag; 31. Card block;

[0024] 4. Secondary explosion-proof components;

[0025] 41, guide rod; 41a, top rod; 41b, low rod; 41c, transition slide;

[0026] 42. Slider; 43. Compression piece; 44. Joint cover; 45. Scratching knife. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 , Figure 2 and Figure 3 The present invention provides a technical solution: a cable explosion-proof box, comprising an upper shell 1, a lower shell 2 is fixed at the bottom of the upper shell 1, the upper shell 1 and the lower shell 2 are both made of stainless steel, a sealing rubber bag 3 is provided in the middle of the inner side of the upper shell 1 and the lower shell 2, and a secondary explosion-proof component 4 for explosion-proof is provided in the middle of the inner side of the upper shell 1 and the lower shell 2;

[0029] The secondary explosion-proof component 4 provides explosion-proof for the cable joint. When the cable is short-circuited, the secondary explosion-proof component 4 discharges the glue in the sealing rubber bag 3 to the cable joint for secondary explosion-proof.

[0030] When in use, when the heat generated by the short circuit of the cable joint heats the sealing structure on itself, the secondary explosion-proof component 4 discharges the glue in the sealing rubber bag 3 to the cable joint for secondary explosion-proofing to prevent explosion.

[0031] See also Figure 3 A clamping block 31 is fixed at the middle of the inner side of the upper shell 1 and the lower shell 2 at the position of the sealing rubber bag 3 , and the clamping block 31 is fixed at the middle of the inner side of the upper shell 1 and the lower shell 2 .

[0032] During use, when the upper shell 1 and the lower shell 2 are not fixed together, the sealing rubber bag 3 is first installed in the clamping block 31 , and the sealing rubber bag 3 contains liquid sealing glue and is in a sealed state.

[0033] See also Figure 3 and Figure 4 The secondary explosion-proof component 4 includes a guide rod 41 fixed on the inner side of the upper shell 1 near the sealing rubber bag 3, and sliders 42 are slidably connected on both sides of the guide rod 41. A compression member 43 is connected between one side of the slider 42 and one end of the inner side of the upper shell 1. The compression member 43 in this application adopts a compression spring, and a joint cover 44 is connected between the two sliders 42. The two joint covers 44 are located at the outer side of the cable joint. A sealing block for wrapping the cable joint is provided between the two joint covers 44. The sealing block is formed by solidifying the sealant. A knife 45 for cutting the bottom of the sealing rubber bag 3 is fixed on the top of the slider 42. The structure of the secondary explosion-proof component 4 in the lower shell 2 is the same as the structure of the secondary explosion-proof component 4 in the upper shell 1.

[0034] When in use, the cable joint is first sealed with sealant to form a sealing block, and then the sealing block is placed between the joint covers 44; when the cable joint short-circuit generates heat, the sealing block is heated, and the joint cover 44, under the guidance of the compression member 43, pushes the two sliders 42 to approach each other. When the sliders 42 approach each other, the sliders 42 drive the cutter 45 to cut the bottom of the sealing bag 3. After the bottom of the sealing bag 3 is cut, the sealant inside flows to the cable joint position, and then a second sealing is performed to prevent the cable joint from contacting with air after the previous sealing block is heated, causing an explosion.

[0035] See also Figure 4 and Figure 5 The guide rod 41 includes a top rod 41a which is arranged to fit the sealing rubber bag 3, a low rod 41b is connected between the two ends of the top rod 41a and the two ends inside the upper shell 1, a transition slide 41c is connected between the low rod 41b and the top rod 41a, the compression member 43 is located outside the low rod 41b, the length of the sealing rubber block is greater than the length of the top rod 41a, and in the initial state, the slider 42 is located outside the low rod 41b and the scratching knife 45 does not contact the bottom of the sealing rubber bag 3.

[0036] When in use, the slider 42 is first outside the lower rod 41b and the cutting knife 45 does not contact the bottom of the sealing rubber bag 3. When the two sliders 42 are pushed closer to each other under the guidance of the compression member 43, the slider 42 slides from the lower rod 41b through the transition slide 41c to the top rod 41a. When the slider 42 is on the transition slide 41c, the cutting knife 45 begins to enter the sealing rubber bag 3. When the slider 42 reaches 41a, the cutting knife 45 is completely inserted into the sealing rubber bag 3 and cuts it.

[0037] Among them, a ball bearing is arranged on the inner side of the sliding block 42, the transition slideway 41c is inclined, and the connection places between the top rod 41a and the lower rod 41b and the transition slideway 41c are all rounded.

[0038] When in use, the slider 42 can reduce the friction when contacting with the top rod 41a, the low rod 41b and the transition slide 41c through the use of balls. The transition slide 41c is inclined, and the connections between the top rod 41a and the low rod 41b and the transition slide 41c are chamfered, which makes it easier for the slider 42 to enter and pass through the transition slide 41c smoothly.

[0039] A cable port is provided in the middle of the connector cover 44 , and the use of the cable port facilitates the insertion of the cable. The outer side of the connector cover 44 is semicircular in shape to facilitate adaptation to the upper shell 1 and the lower shell 2 .

[0040] The upper shell 1 and the lower shell 2 are fixed by bolts to facilitate the fixation between the upper shell 1 and the lower shell 2. Fixing rings are fixed at the ends of the upper shell 1 and the lower shell 2 to facilitate the fixation of the ends of the upper shell 1 and the lower shell 2.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cable explosion-proof box, characterized in that: It comprises an upper shell (1), a lower shell (2) is fixed at the bottom of the upper shell (1), a sealing rubber bag (3) is provided at the middle of the inner side of the upper shell (1) and the lower shell (2), and a secondary explosion-proof component (4) for explosion-proof is provided at the middle of the inner side of the upper shell (1) and the lower shell (2); The secondary explosion-proof component (4) provides explosion-proof protection for the cable joint. When the cable is short-circuited, the secondary explosion-proof component (4) discharges the glue in the sealing plastic bag (3) to the cable joint for secondary explosion-proof protection. The secondary explosion-proof component (4) comprises a guide rod (41) fixed on the inner side of the upper shell (1) near the sealing rubber bag (3), and sliders (42) are slidably connected to both sides of the guide rod (41). A compression member (43) is connected between one side of the slider (42) and one end of the inner side of the upper shell (1), and a joint cover (44) is connected between the two sliders (42). The two joint covers (44) are located at the outer side of the cable joint, and a sealing block for wrapping the cable joint is provided between the two joint covers (44). A knife (45) for cutting the bottom of the sealing rubber bag (3) is fixed to the top of the slider (42). The structure of the secondary explosion-proof component (4) in the lower shell (2) is the same as the structure of the secondary explosion-proof component (4) in the upper shell (1).

2. The cable explosion-proof box according to claim 1, characterized in that: A clamping block (31) is fixed in the middle of the inner side of the upper shell (1) and the lower shell (2) at the position of the sealing rubber bag (3).

3. The cable explosion-proof box according to claim 1, characterized in that: The guide rod (41) comprises a top rod (41a) arranged to fit the sealing rubber bag (3); a low rod (41b) is connected between the two ends of the top rod (41a) and the two ends inside the upper shell (1); a transition slideway (41c) is connected between the low rod (41b) and the top rod (41a); the compression member (43) is located outside the low rod (41b); the length of the sealing rubber block is greater than the length of the top rod (41a); in an initial state, the slider (42) is located outside the low rod (41b) and the cutter (45) does not contact the bottom of the sealing rubber bag (3).

4. The cable explosion-proof box according to claim 3, characterized in that: A ball bearing is arranged inside the sliding block (42), the transition slideway (41c) is inclined, and the connection points between the top rod (41a) and the lower rod (41b) and the transition slideway (41c) are all rounded.

5. The cable explosion-proof box according to claim 1, characterized in that: A cable opening is provided in the middle of the connector cover (44), and the outer side of the connector cover (44) is semicircular.

6. The cable explosion-proof box according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) are fixed by bolts, and fixing rings are fixed at the ends of the upper shell (1) and the lower shell (2).

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