Low-voltage cable explosion-proof box

Abstract

The utility model discloses a low voltage cable explosion-proof box, comprising a box body, two sides of the box body are respectively provided with at least one cable sleeve, the cable sleeve comprises a hooping inner sleeve, the periphery of the hooping inner sleeve is sleeved with a hooping outer sleeve, and the hooping outer sleeve can tightly press the hooping inner sleeve to fix a cable when moving towards the direction of the box body; a PLC is further arranged in the box body, the output end of the PLC is electrically connected with a buzzer, and the input end of the PLC is electrically connected with a smoke sensor and a humidity sensor. According to the utility model, the fastening sleeve for fastening the cable and the cable clamp are arranged, so that the cable is doubly fixed, and explosion caused by collision of cable joints is avoided; the PLC and the humidity sensor are arranged, when the humidity is too high, an alarm is given in time, then relevant measures are taken in time, and explosion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cable boxes, in particular to a low-voltage cable explosion-proof box. Background Art

[0002] The function of the explosion-proof junction box is to install it on the cable joint to prevent the cable joint from exploding due to interference from external factors. The main reasons for the explosion of the cable joint are excessive humidity in the cable box or loose cable joints and collision.

[0003] Existing cable explosion-proof boxes are all metal boxes installed around the cable joints. When the cable joints are punctured or exploded, they are used to limit the explosion range. Such cable boxes can only prevent minor incidents but cannot prevent them from happening and cannot prevent explosions from the root. Utility Model Content

[0004] The main purpose of the utility model is to provide a low-voltage cable explosion-proof box, aiming to solve the technical problem that the cable explosion-proof box in the prior art cannot be explosion-proof from the root.

[0005] To achieve the above-mentioned object, the utility model provides a low-voltage cable explosion-proof box, comprising a box body, a box cover adapted to the box body is arranged on the box body, the box cover is detachably mounted on the box body by means of hexagon socket screws, a cavity is arranged in the box body, a wiring copper bar is installed in the cavity, at least one cable sleeve is arranged on each side of the box body, the cable sleeve comprises a tightening inner sleeve, a tightening outer sleeve is arranged on the outer periphery of the tightening inner sleeve, and the tightening outer sleeve can press the tightening inner sleeve when it moves toward the box body, so as to fix the cable;

[0006] The box body is also provided with a PLC controller, the output end of the PLC controller is electrically connected to a buzzer, and the input end of the PLC controller is electrically connected to a smoke sensor and a humidity sensor.

[0007] Furthermore, the tightening inner sleeve includes a tightening section, an external thread section, and a limiting section. The tightening section is a hollow frustum, and is composed of at least three tightening plates with equal angular distances. There is a spacing between the tightening plates, and the tightening plates can be compressed radially. An external thread section is provided on the right side of the tightening section, and a limiting section is provided on the right side of the external thread section.

[0008] Furthermore, the clamping sleeve includes an extrusion section, an installation section, and an internal thread. The extrusion section is used to extrude the clamping section when moving right to clamp the cable in the clamping section. The extrusion section is a hollow frustum. An installation section is provided on the right side of the extrusion section. An internal thread is provided inside the installation section, and the internal thread is adapted to the thread on the external thread section.

[0009] Furthermore, the slope of the truncated cone of the extrusion section is greater than the slope of the truncated cone of the tightening section, and the cross-sectional shapes of the limiting section and the installation section are both hollow hexagons.

[0010] Furthermore, the wiring copper busbar is mounted on the copper busbar rack by means of screws, and the copper busbar rack is mounted on the box body by means of screws.

[0011] Furthermore, cable clamps adapted to the cable sleeve are provided on both sides of the wiring copper busbar, and the cable clamps include a lower cable clamping block and an upper cable clamping block. Both the upper cable clamping block and the lower cable clamping block are provided with arc-shaped clamping openings, and the upper cable clamping block is detachably mounted on the lower cable clamping block by bolts.

[0012] Furthermore, the box body is provided with a waterproof edge and a limiting groove, the waterproof edge is arranged at the periphery of the cavity, and the limiting groove is adapted to the limiting section for clamping the limiting section during installation.

[0013] Furthermore, a gasket is sleeved on the tightening inner sleeve, and the gasket is installed between the tightening inner sleeve and the tightening outer sleeve.

[0014] Furthermore, hanging feet are installed at the four corners of the bottom of the box body through screws.

[0015] The beneficial effects of the utility model are embodied in:

[0016] In the utility model, a tightening sleeve and a cable clamp are provided for tightening the cable, and the cable is doubly fixed to avoid explosion due to collision of the cable joints; a PLC controller and a humidity sensor are provided to give an alarm in time when the humidity is too high, and relevant measures are taken in time to avoid explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is an exploded view of the cable sleeve of the utility model;

[0020] Figure 4 This is the PLC control ladder diagram of the utility model.

[0021] Description of reference numerals:

[0022] 1. Box body, 1a. Waterproof edge, 1b. Limiting groove, 2. Box cover, 3. Wiring copper busbar, 4. Copper busbar rack, 5. Tightening inner sleeve, 5a. Tightening section, 5b. External thread section, 5c. Limiting section, 6. Gasket, 7. Tightening outer sleeve, 7a. Extrusion section, 7b. Installation section, 7c. Internal thread, 8. PLC controller, 9. Smoke sensor, 10. Humidity sensor, 11. Cable upper clamp, 12. Cable lower clamp, 13. Hanging foot, 14. Hexagon socket screw, 15. Buzzer. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0026] See also Figures 1 to 4The utility model discloses a low-voltage cable explosion-proof box, comprising a box body 1, a box cover 2 adapted to the box body 1 is arranged on the box body 1, the box cover 2 is detachably mounted on the box body 1 by means of a hexagon socket screw 14, a cavity is arranged in the box body 1, a wiring copper bar 3 is installed in the cavity, at least one cable sleeve is arranged on each side of the box body 1, the cable sleeve comprises a tightening inner sleeve 5, a tightening outer sleeve 7 is arranged on the outer periphery of the tightening inner sleeve 5, and the tightening outer sleeve 7 can press the tightening inner sleeve 5 when it moves toward the box body 1, so as to fix the cable;

[0027] A PLC controller 8 is also provided in the box body 1 , and an output end of the PLC controller 8 is electrically connected to a buzzer 15 , and an input end of the PLC controller 8 is electrically connected to a smoke sensor 9 and a humidity sensor 10 .

[0028] The existing cable explosion-proof box cannot be explosion-proof from the root; in the utility model, a fastening sleeve and a cable clamp are provided to fasten the cable, and the cable is doubly fixed to avoid collision and explosion of the cable joints; a PLC controller and a humidity sensor are provided to alarm in time when the humidity is too high, and relevant measures are taken in time to avoid explosion.

[0029] How it works

[0030] When in use, pass the cable connector through the clamping outer sleeve and the inner sleeve, and then through the box body to connect to the wiring copper bar. The cable in the box body is fixed in the box body by the cable clamp, and the clamping outer sleeve is tightened at the same time. The clamping section will be squeezed during the tightening process of the clamping outer sleeve to clamp the cable, thereby realizing double fixing of the cable connector to avoid the cable connector from shaking and colliding and exploding;

[0031] At the same time, a buzzer controlled by a PLC controller is set. When the humidity is too high or there is smoke, the buzzer will alarm, reminding the staff to check in time and take relevant avoidance measures.

[0032] It should be noted that the selected PLC is Mitsubishi FX3U series, which can be purchased on the market. The control principle is:

[0033] X0 humidity sensor, X1 smoke sensor, X2 manual switch, Y0 buzzer;

[0034] When the humidity detection sensor X0 detects that the humidity inside the box is high, it automatically closes, turns on the buzzer Y0 and self-locks, and alarms; when the smoke sensor X1 detects smoke in the box, it automatically closes, turns on the buzzer Y0 and self-locks, and alarms. When the buzzer Y0 needs to be turned off, press the normally closed switch X2 to turn off the alarm.

[0035] Both the smoke sensor and the humidity sensor can be purchased from the market, and there is no restriction on the specific model.

[0036] In some embodiments, see Figure 3 As shown, the tightening inner sleeve 5 includes a tightening section 5a, an external thread section 5b, and a limiting section 5c. The tightening section 5a is a hollow frustum. The tightening section 5a is composed of at least three tightening plates with equal angular distances. There is a spacing between the tightening plates. The tightening plates can be compressed radially. An external thread section 5b is provided on the right side of the tightening section 5a, and a limiting section 5c is provided on the right side of the external thread section 5b.

[0037] In some embodiments, see Figure 3 As shown, the clamping sleeve 7 includes an extrusion section 7a, a mounting section 7b, and an internal thread 7c. The extrusion section 7a is used to extrude the clamping section 5a when moving right, so as to clamp the cable in the clamping section 5a. The extrusion section 7a is a hollow frustum. A mounting section 7b is provided on the right side of the extrusion section 7a. An internal thread 7c is provided inside the mounting section 7b, and the internal thread 7c is adapted to the thread on the external thread section 5b.

[0038] In some embodiments, see Figure 3 As shown, the slope of the truncated cone of the extrusion section 7a is greater than the slope of the truncated cone of the tightening section 5a, and the cross-sectional shapes of the limiting section 5c and the mounting section 7b are both hollow hexagons.

[0039] In some embodiments, see Figure 1 As shown, the wiring copper bar 3 is mounted on the copper bar frame 4 by screws, and the copper bar frame 4 is mounted on the box body 1 by screws.

[0040] In some embodiments, see Figure 1 As shown, cable clamps adapted to the cable sleeve are provided on both sides of the wiring copper busbar 3, and the cable clamps include a lower cable clamp block 12 and an upper cable clamp block 11. Both the upper cable clamp block 11 and the lower cable clamp block 12 are provided with arc-shaped clamping openings, and the upper cable clamp block 11 is detachably mounted on the lower cable clamp block 12 by bolts.

[0041] In some embodiments, see Figure 1 As shown, the box body 1 is provided with a waterproof edge 1a and a limiting groove 1b. The waterproof edge 1a is arranged at the periphery of the cavity, and the limiting groove 1b is adapted to the limiting section 5c to clamp the limiting section 5c during installation.

[0042] In some embodiments, see Figure 1 As shown in FIG. 3 , a gasket 6 is sleeved on the tightening inner sleeve 5 , and the gasket 6 is installed between the tightening inner sleeve 5 and the tightening outer sleeve 7 .

[0043] In some embodiments, see Figure 2 As shown, hanging feet 13 are installed at the four corners of the bottom of the box body 1 through screws.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-voltage cable explosion-proof box, comprising a box body (1), the box body (1) being provided with a box cover (2) adapted to the box body (1), the box cover (2) being detachably mounted on the box body (1) by means of hexagon socket screws (14), the box body (1) being provided with a cavity, a wiring copper busbar (3) being mounted in the cavity, It is characterized in that At least one cable sleeve is disposed on each side of the box body (1), the cable sleeve comprising a tightening inner sleeve (5), a tightening outer sleeve (7) being sleeved on the outer periphery of the tightening inner sleeve (5), and the tightening outer sleeve (7) can press the tightening inner sleeve (5) when it moves toward the box body (1) to fix the cable; A PLC controller (8) is also provided in the box body (1); an output end of the PLC controller (8) is electrically connected to a buzzer (15); and an input end of the PLC controller (8) is electrically connected to a smoke sensor (9) and a humidity sensor (10).

2. A low voltage cable explosion-proof box as claimed in claim 1, It is characterized in that The tightening inner sleeve (5) comprises a tightening section (5a), an external thread section (5b), and a limiting section (5c); the tightening section (5a) is in the shape of a hollow truncated cone; the tightening section (5a) is composed of at least three tightening sheets with equal angular spacing; a spacing is provided between the tightening sheets; the tightening sheets can be compressed in the radial direction; an external thread section (5b) is provided on the right side of the tightening section (5a); and a limiting section (5c) is provided on the right side of the external thread section (5b).

3. A low voltage cable explosion-proof box as claimed in claim 2, It is characterized in that The clamping sleeve (7) comprises an extrusion section (7a), a mounting section (7b), and an internal thread (7c); the extrusion section (7a) is used to extrude the clamping section (5a) when moving rightward, so as to clamp the cable in the clamping section (5a); the extrusion section (7a) is in the shape of a hollow truncated cone; a mounting section (7b) is provided on the right side of the extrusion section (7a); an internal thread (7c) is provided inside the mounting section (7b); the internal thread (7c) is adapted to the thread on the external thread section (5b).

4. A low voltage cable explosion-proof box as claimed in claim 3, It is characterized in that The slope of the truncated cone of the extrusion section (7a) is greater than the slope of the truncated cone of the clamping section (5a), and the cross-sectional shapes of the limiting section (5c) and the installation section (7b) are both hollow hexagons.

5. A low voltage cable explosion-proof box as claimed in claim 1, It is characterized in that The copper busbar (3) is mounted on a copper busbar frame (4) by means of screws, and the copper busbar frame (4) is mounted on the box body (1) by means of screws.

6. A low voltage cable explosion-proof box as claimed in claim 5, It is characterized in that Cable clamps adapted to the cable sleeve are provided on both sides of the wiring copper bar (3), the cable clamps comprising a lower cable clamp block (12) and an upper cable clamp block (11), both the upper cable clamp block (11) and the lower cable clamp block (12) being provided with arc-shaped clamping openings, the upper cable clamp block (11) being detachably mounted on the lower cable clamp block (12) by means of bolts.

7. A low voltage cable explosion-proof box as claimed in claim 2, It is characterized in that The box body (1) is provided with a waterproof edge (1a) and a limiting groove (1b); the waterproof edge (1a) is arranged at the periphery of the cavity; the limiting groove (1b) is adapted to the limiting section (5c) and is used to clamp the limiting section (5c) during installation.

8. A low voltage cable explosion-proof box as claimed in claim 2, It is characterized in that A gasket (6) is sleeved on the tightening inner sleeve (5), and the gasket (6) is installed between the tightening inner sleeve (5) and the tightening outer sleeve (7).

9. A low voltage cable explosion-proof box as claimed in claim 2, It is characterized in that Hanging feet (13) are installed at the four corners of the bottom of the box body (1) by means of screws.

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