CN116780435A

CN116780435A - Mining explosion-proof cable junction box

Info

Publication number: CN116780435A
Application number: CN202310793004.9A
Authority: CN
Inventors: 石晓霞; 张�杰; 陈硕之; 薛夏伟; 汤泉刚; 陆信; 孙江生
Original assignee: Zhejiang Xutong Intelligent Technology Co ltd; DIANGUANG EXPLOSION-PROOF TECHNOLOGY CO LTD
Current assignee: Zhejiang Xutong Intelligent Technology Co ltd; DIANGUANG EXPLOSION-PROOF TECHNOLOGY CO LTD
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-09-19
Anticipated expiration: 2043-06-29
Also published as: CN116780435B

Abstract

The application relates to the field of cable junction boxes, and particularly discloses a mining explosion-proof cable junction box which comprises a box body and a wiring piece arranged in the box body, wherein the wiring piece comprises a plurality of baffles and a base connected with the baffles, and a wiring space for extending in the end part of a power line of a cable is formed between adjacent baffles. The application has the effect of reducing the volume of the junction box.

Description

Mining explosion-proof cable junction box

Technical Field

The application relates to the field of cable junction boxes, in particular to a mining explosion-proof cable junction box.

Background

In order to meet the electricity demand in the mine, the laying length of the mining high-voltage power supply line is long. The mining high-voltage power supply circuit is formed by a plurality of sections of cables and a cable junction box connected with two adjacent cables, and when the problem of electricity utilization occurs in the mine, the fault point can be positioned and removed rapidly through the arrangement.

The mining cable often comprises a ground wire, a monitoring line and a plurality of power lines, when two sections of mining cables are connected, the monitoring lines are required to be connected, and the power lines are respectively and correspondingly connected and grounded to the ground wire.

In the related art, the mining explosion-proof cable junction box comprises a box body, wiring ports arranged on the box body and a plurality of wiring seats fixed in the box body, wherein the number of the wiring seats is consistent with the number of power lines in cables to be connected, and the wiring seats are made of ceramics. Two baffles which are symmetrically arranged are arranged on each wire holder so as to increase the creepage distance. In order to ensure the structural strength of the junction box, the box body is usually made of iron. When the power lines of the two sections of mining cables are connected, the corresponding power lines of the two sections of mining cables are required to be connected through the corresponding wire holders.

In order to avoid breakdown as much as possible, the terminal blocks are required to be arranged side by side in the box body, namely, arranged along the arrangement direction of the baffle plates on the terminal blocks. In order to enable the space in the box body to meet the installation requirements of a plurality of wire holders, the size of the box body needs to be matched with the sum of the installation sizes of the wire holders, so that the size of the box body is large, the weight of the junction box is influenced, and the improvement is needed.

Disclosure of Invention

In order to reduce the size of the junction box, the application provides a mining explosion-proof cable junction box.

The application provides a mining explosion-proof cable junction box which adopts the following technical scheme:

the utility model provides a mining explosion-proof cable junction box, includes the box body, still includes the wiring spare of setting in the box body, the wiring spare includes a plurality of baffles and connects the base of each baffle, adjacent be formed with the wiring space that the tip of the power line of confession cable stretches into between the baffle.

Through adopting above-mentioned technical scheme, through the mode that will set up the baffle on the base to form a plurality of wiring spaces, so that can connect the multiunit power line on the wiring spare. Compared with the arrangement of a plurality of groups of wire holders according to the number of the power lines, the arrangement can reduce the number of baffles on one hand, the structure for wiring is compact under the condition of guaranteeing the safety performance of the junction box, on the other hand, the wire holders are not required to be fixed, only one wire holder is required to be fixed, and the number of structures for connecting and fixing is reduced. In conclusion, the volume of the box body can be correspondingly reduced, so that the quality of the junction box is effectively reduced. The operation environment is abominable in the ore deposit, and the terminal box after the quality is reduced has greatly improved the staff and has transported the terminal box and carry out wiring operation simplicity.

Optionally, the wire connector is made of DMC.

By adopting the technical scheme, compared with the wiring seat made of the ceramic piece, the wiring piece made of the DMC material has good insulating property, and the weight of the wiring piece can be effectively reduced, so that the overall quality of the wiring box is further reduced, and convenience is brought to the transportation and wiring operation of workers.

Optionally, be provided with the wiring subassembly in the wiring space, the wiring subassembly is including setting up terminal and the cable preforming of slip setting on the terminal on the base.

Through adopting above-mentioned technical scheme, when connecting the power cord of two mining cables, place the corresponding power cord of two mining cables between cable preforming and base earlier to make the corresponding power cord of two mining cables conflict, rethread removes the cable preforming, with the conflict end removal of the power cord of restriction two mining cables. The cable pressing piece is limited to move by arranging a nut which is connected to the binding post through threads on the binding post. Through the mode, the power lines of the mining cables are fixed, and the stability of connection of the power lines of the two mining cables is guaranteed.

Optionally, the base is provided with a positioning groove, the binding post is provided with a positioning block, and the positioning block is inserted into the positioning groove.

Through adopting above-mentioned technical scheme, during installation wiring subassembly, insert tip and the locating piece of terminal and establish in the constant head tank, fix the tip of locating piece and terminal again, help on the one hand fixing the wiring post, on the other hand improved the joint strength between terminal and the base.

Optionally, the box cover is further provided with a box sealing ring which is used for abutting against the box body.

By adopting the technical scheme, the sealing performance between the box cover and the box body is improved by additionally arranging the box sealing ring on the box cover, so that the waterproof performance of the junction box is improved.

Optionally, the box comprises a box cover, and the box body and the box cover are made of stainless steel.

By adopting the technical scheme, compared with the case body and the case cover made of iron, the oxidation resistance of the junction box is improved and the service life of the junction box is effectively prolonged by the case body and the case cover made of stainless steel.

Optionally, the cable sleeve further comprises a cable sleeve and a connecting structure arranged on the cable sleeve, and the cable sleeve is connected with the box body through the connecting structure.

Through adopting above-mentioned technical scheme, according to the kind of cable different, select corresponding cable cover, select the cable cover that can fix the armoured cable like the armoured cable, the rubber sleeve cable then select the cable cover that can fix the rubber sleeve cable to be connected with the box body through connection structure, the connection between the different kinds of cable then can be realized to this setting. The same cable sleeve is selected, so that the connection of the same cable can be realized.

According to different conditions in the mine, different cables are needed for laying different sections of the cable, and part of the sections have high requirements on the impact strength of the cable, so that an armored cable needs to be laid, and the other parts of the sections are laid with rubber sleeve cables. The cost of the armored cable is far higher than that of the rubber sleeve cable, so that the laying cost of the cable can be reduced, and the flexibility of cable laying is improved.

Optionally, the wiring space and the monitoring belt are respectively located at two sides of the base, and the side wall of the base is provided with a protective groove.

By adopting the technical scheme, when the monitoring lines of the two mining cables are connected, the monitoring lines of the two mining cables are connected to the monitoring belt umbrella. The protection groove is additionally arranged, so that each section of the side wall of the base can be provided to form a plurality of partition boards, the creepage distance is increased, and the breakdown is avoided as much as possible.

Optionally, the number of the wiring components arranged in each wiring space is two, and the wiring components further comprise a cable bottom sheet arranged below the cable pressing sheet;

each link up the subassembly all is provided with in the space of working a telephone switchboard, link up the subassembly and including sliding the link up seat that sets up between two wiring subassemblies, connect actuating lever on the link up seat, two link up the post and two link up clamping pieces of electric connection on different cable negative pieces respectively that set up on the link up seat, be provided with the lid on the box body, the actuating lever runs through and sliding the setting on the lid, two link up the post electricity is connected, two link up the clamping piece and be used for the centre gripping respectively different link up the post, when linking up the clamping piece centre gripping link up the post, link up the post and be connected with the clamping piece electricity, the link up seat can remove to two link up the post and be held by different link up clamping pieces respectively, link up the seat and can also remove to link up post and link up the clamping piece separation.

By adopting the technical scheme, when the mining cable is fixed, the end part of the power line of the mining cable is inserted between the cable bottom plate and the cable pressing plate, and then the end part of the power line of the mining cable is clamped through the cable bottom plate and the cable pressing plate.

When the power lines of the two mining cables are connected, the box cover is covered, the connecting seat is moved outside the box cover through the driving rod, so that the two connecting columns on the connecting seat move until the two connecting clamping pieces clamp different connecting columns respectively, and at the moment, the corresponding power lines of the two mining cables are conducted.

Before the box cover is opened, the connecting seat is driven by the driving rod to move to the connection column to be separated from the connection clamping piece, so that power lines of two mining cables are separated, the situation that a worker directly opens the box cover under the condition of forgetting to power off is avoided as much as possible, and the safety performance of the junction box is improved when the junction box is used.

Optionally, still include the insurance subassembly, the insurance subassembly includes the insurance spare, sets up reset spring and the insurance lid of setting on the insurance spare on the insurance piece, each actuating lever all is connected on the insurance spare, set up the insurance seal groove that supplies insurance spare tip to insert on the box body, be provided with the insurance sealing washer on the cell wall of insurance seal groove, when the tip of insurance spare inserts and establishes in the insurance seal groove, the insurance sealing washer supports the lateral wall of tight insurance spare, the insurance lid cover is established on the tip of box body and the box lid, insurance lid and box body joint cooperation, when reset spring is in natural state, linking post and linking clamping piece separation.

Through adopting above-mentioned technical scheme, during the maintenance, take off the insurance lid earlier, the insurance lid drives the insurance piece and removes to make each actuating lever remove together, thereby make the linking seat remove to each linking post and link up the clamping piece and separate. At this time, the reset spring is reset, so that the connection post and the connection clamping piece are kept in a separated state. Meanwhile, the joint between the box cover and the box body is exposed, so that workers can separate the box cover from the box body. The safety cover is required to be removed before the box cover and the box body are separated, so that the connecting column and the connecting clamping piece are separated, and the safety performance of the junction box is further improved when the junction box is used.

After the maintenance is finished, the box cover and the box body are covered, and then the box cover and the box body are connected through bolts. And then the safety cover is covered on the end part of the box body and the box cover, the end part of the safety piece is inserted into the safety sealing groove, and the safety sealing ring abuts against the side wall of the safety piece so as to improve the sealing effect, and the safety cover is matched with the box body in a clamping way, so that the safety cover is limited to be separated from the box body and the box cover. The lid that so set up not only can seal the junction of insurance lid and box body, has further improved the waterproof performance of terminal box, can also restrict the staff and open the lid before the outage, has improved the security performance of terminal box.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the baffle plate and the base are integrated into a whole, so that the volume of the wiring piece is effectively reduced, the volume of the box body is reduced, the wiring piece is formed by DMC materials, the weight of the wiring box is greatly reduced, the mining operation environment is bad, and the arrangement is convenient for workers to transport and operate wiring;

2. the side wall of the base is provided with the protective groove, so that the creepage distance can be effectively increased, and the breakdown condition can be avoided as much as possible;

3. by additionally arranging the connection assembly and the safety assembly, before the box cover is separated and opened by a worker for overhauling, the connection between power lines of the two mining cables is required to be disconnected, the situation that the box cover is directly opened by the worker under the condition of forgetting to power off is avoided as much as possible, and the safety performance of the junction box in use is improved.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present application.

Fig. 2 is a schematic view showing the structure of removing the cap in embodiment 1 of the present application.

Fig. 3 is a schematic view showing the structure of a sealing ring of a cartridge in embodiment 1 of the present application.

Fig. 4 is a schematic partial sectional view showing a connection structure in embodiment 1 of the present application.

Fig. 5 is an exploded view showing the positioning groove in embodiment 1 of the present application.

Fig. 6 is an exploded view of embodiment 2 of the present application.

FIG. 7 is a schematic view showing the structure of the wire connecting assembly and the connecting assembly in embodiment 2 of the present application.

Reference numerals illustrate:

1. a case body; 11. a clamping groove; 2. a box cover; 21. a box seal groove; 22. a box seal ring; 23. a safety seal groove; 3. a cable sleeve; 4. a connection structure; 41. a mounting ring; 42. connecting sleeves; 43. a limit seat; 431. a cable seal groove; 5. a wiring member; 51. a base; 511. a protective groove; 512. a positioning groove; 52. a baffle; 53. a wiring space; 6. a wiring assembly; 61. a cable backsheet; 62. pressing the cable into a sheet; 63. binding posts; 631. a positioning block; 7. a monitoring component; 71. monitoring the belt; 72. monitoring the column; 8. a joining assembly; 81. a driving rod; 82. a connecting seat; 83. a connecting column; 84. a connecting clamping piece; 9. a safety component; 91. a safety member; 92. a return spring; 93. a safety cover; 94. and (5) a safety sealing ring.

Detailed Description

The application is described in further detail below with reference to fig. 1-7.

The embodiment of the application discloses a mining explosion-proof cable junction box.

Example 1:

referring to fig. 1 and 2, the mining explosion-proof cable junction box comprises a box body 1, a box cover 2 for shielding an opening of the box body 1, two cable sleeves 3 for fixing cables, and two groups of connecting structures 4 for respectively connecting different cable sleeves 3 with the box body 1. The box body 1 is internally provided with a wiring piece 5, three groups of monitoring components 7 which are used for connecting two mining cables with corresponding power line wiring components 6 and are used for connecting monitoring lines of the two mining cables.

Referring to fig. 1 and 3, the case body 1 and the case cover 2 are made of stainless steel, and the case cover 2 is connected with the case body 1 through bolts. The end face of the box cover 2, facing the box body 1, is provided with a box sealing groove 21, a box sealing ring 22 for abutting against the box body 1 is arranged in the box sealing groove 21, and the box sealing ring 22 is embedded in the box sealing groove 21.

Referring to fig. 4, the connection structure 4 includes a mounting ring 41 fixed to the case 1, a connection sleeve 42 fixed to an end of the cable sheath 3, and a limit seat 43 sleeved and fixed to the cable sheath 3. An inner hole of the mounting ring 41 is communicated with an inner cavity of the box body 1, the connecting sleeve 42 is communicated with an inner cavity of the cable sleeve 3, and the connecting sleeve 42 is inserted into the inner hole of the mounting ring 41. The limiting seat 43 is in contact with the mounting ring 41, and the limiting seat 43 is connected with the mounting ring 41 through bolts. The end face of the limiting seat 43 facing the mounting seat is provided with a cable sealing groove 431, and a sealing ring is arranged in the cable sealing groove 431 so as to ensure the waterproof performance of the joint of the cable sleeve 3 and the box body 1.

Different cable jackets 3 are selected according to different cables to be connected, so that the junction box of the application can connect different cables. As shown in fig. 1, the cable sheath 3 on the left side in the drawing is the cable sheath 3 for fixing the armored cable, and the cable sheath 3 on the right side in the drawing is for fixing the rubber-jacketed cable.

Referring to fig. 2 and 5, the wire connector 5 includes a base 51 and four baffles 52 connected to an end surface of the base 51 facing the opening of the case 1, and the baffles 52 and the base 51 are integrally formed of DMC material. The base 51 is fixed in the box body 1 through a bolt, and the two side walls of the base 51 facing the two cable jackets 3 are provided with protective grooves 511 to increase the creepage distance. The arrangement direction of the baffles 52 is perpendicular to the arrangement direction of the two cable jackets 3, the adjacent baffles 52 and the base 51 enclose a wiring space 53, and the wiring space 53 is used for the end part of a power line of a cable to extend in.

Referring to fig. 2 and 5, each of the wiring assemblies 6 is disposed in a different wiring space 53, and the wiring assembly 6 includes a cable bottom sheet 61, a cable presser 62, and two wiring posts 63. The base 51 is provided with positioning grooves 512 the number of which is consistent with that of the binding posts 63, each binding post 63 is sleeved and fixed with two positioning blocks 631, each binding post 63 is respectively inserted into different positioning grooves 512, each positioning block 631 on each binding post 63 is inserted into each positioning groove 512, and the end parts of the binding posts 63 and the positioning blocks 631 are fixedly connected with the hole walls of the positioning grooves 512.

Referring to fig. 2, the post 63 penetrates the cable bottom piece 61 and the cable presser 62, and the cable bottom piece 61 and the cable presser 62 are slidably disposed on the post 63 along the axis of the post 63. The cable bottom piece 61 is located on one side of the cable presser 62 near the base 51, and the cable bottom piece 61 and the cable tab are made of conductive materials and are used for abutting against the end of the power line of the cable. By screwing the nut to the post 63 and pressing the nut against the side of the cable presser 62 away from the cable back sheet 61, the cable presser 62 is restrained from moving in a direction away from the cable back sheet 61, so that the cable presser 62 and the cable back sheet 61 clamp the power line of the cable.

Referring to fig. 2, the monitoring assembly 7 includes a monitoring band 71 and two monitoring posts 72, both of which 72 are fixed in the case 1. The monitoring band 71 is a copper band, and both monitoring posts 72 penetrate the monitoring band 71, and one section of the monitoring band 71 is located between the base 51 and the bottom wall of the box 1, so that the monitoring band 71 can be fixed in the box 1. The monitoring lines of the two cables can be connected by connecting the monitoring lines of the two cables to the monitoring band 71.

The implementation principle of the embodiment 1 is as follows: when two cables are connected, the box cover 2 is opened firstly, then the end parts of the two cables respectively penetrate through the inner holes of the different cable jackets 3 and the connecting sleeve 42 and extend into the box body 1, and then the two cables are fixed through the two cable jackets 3. Then, the corresponding power lines of the two cables are inserted between the cable bottom pieces 61 and the cable pressing pieces 62 of the corresponding wiring assemblies 6, the power lines of the cables are clamped by the cable bottom pieces 61 and the cable pressing pieces 62, and the monitoring lines of the two cables are connected by the monitoring tape 71. And finally, covering the box cover 2, and connecting the box cover 2 with the box body 1 through bolts.

The wiring member 5 thus provided enables the volume of the case body 1 to be reduced accordingly, thereby reducing the volume of the junction box of the present application and reducing the weight of the junction box of the present application. The working environment in the mine is severe, the weight of the junction box is reduced, the volume of the junction box is reduced, and workers can conveniently transport the junction box and implement wiring operation.

Example 2:

referring to fig. 6 and 7, the embodiment of the present application is different from embodiment 1 in that the present application further includes a connection component 8 and a safety component 9, and the number of the connection components 6 in each connection space 53 is two. The wiring components 6 in the same wiring space 53 are arranged along the arrangement direction of the two cable jackets 3, and different wiring components 6 in the same wiring space 53 are respectively used for fixing power lines of different cables to be connected.

Referring to fig. 6 and 7, the engagement assembly 8 includes a driving rod 81, an engagement seat 82, two engagement posts 83, and two engagement clips 84. The connecting seat 82 is slidably disposed between the two wiring components 6 in the same wiring space 53, and the sliding direction of the connecting post 83 is perpendicular to the arrangement direction of the two wiring components 6 in the same wiring space 53. One end of the driving rod 81 is fixed on the connecting seat 82, the other end of the driving rod 81 penetrates through the box cover 2, and the driving rod 81 is arranged on the box cover 2 in a sliding mode along the sliding direction of the connecting seat 82.

Referring to fig. 7, the connection posts 83 and the connection clips 84 are made of conductive metal, and the connection posts 83 are fixed on the connection base 82, and the connection posts 83 are electrically connected by wires. The two engaging clips 84 are respectively fixed on different cable bottom pieces 61 and electrically connected with the cable bottom pieces 61, and the two engaging clips 84 are respectively used for clamping different engaging posts 83. When the engagement clip 84 clamps the engagement post 83, the engagement post 83 is electrically connected to the engagement clip 84. The engaging seat 82 can be moved to the state that the two engaging posts 83 are respectively gripped by the different engaging clips 84, and the engaging seat 82 can also be moved to the state that the engaging posts 83 are separated from the engaging clips 84.

Referring to fig. 6, the safety assembly 9 includes a safety member 91, a plurality of return springs 92 provided on the safety block, and a safety cap 93 fixedly coupled to the safety member 91. The safety member 91 is a T-shaped block, and the end of each driving rod 81 is fixedly connected to the safety member 91. The end face of the box cover 2, which is far away from the box body 1, is provided with a safety seal groove 23, the safety seal groove 23 is used for inserting the end part of the safety piece 91, and a safety seal ring 94 is fixed on the groove wall of the safety seal groove 23. When the end of the safety piece 91 is inserted into the safety seal groove 23, the safety seal 94 abuts against the side wall of the safety piece 91.

Referring to fig. 6 and 7, the return spring 92 is extended and contracted in the sliding direction of the driving lever 81, and both ends of the return spring 92 are fixedly connected to the fuse 91 and the cover 2, respectively. When the return spring 92 is in a natural state, the engagement post 83 is separated from the engagement clip 84.

Referring to fig. 2, a safety cover 93 is provided over the end of the case 1 and the case cover 2 so as to cover a gap between the case 1 and the case cover 2 and a bolt connecting the case cover 2 and the case 1. The safety block is made of plastic and can deform. Four clamping blocks (not shown in the figure) are integrally formed on the inner wall of the safety cover 93, four clamping grooves 11 are formed in the side wall of the box body 1, and each clamping block is respectively matched with the different clamping grooves 11 in a clamping mode.

The implementation principle of the embodiment 2 is as follows: when the box cover 2 is opened for maintenance, the clamping blocks are moved out of the clamping grooves 11, and then the safety cover 93 is moved so as to expose bolts connecting the box cover 2 and the box body 1. The safety device 91 moves together with the safety cover 93, and the safety device 91 drives each connecting seat 82 to move through the driving rod 81, so that each connecting column 83 moves to be separated from the connecting clamping piece 84, and at the moment, the power lines of the two mining cables are disconnected. And finally, the bolt connecting the box cover 2 with the box body 1 is removed by rotating, and the box cover 2 is removed to overhaul the inside of the box body 1.

The mine environment is complex, and the power line of the cable is directly exposed in the mine environment under the condition of electrifying, so that huge potential safety hazards exist. By the arrangement, before the box cover 2 is opened for overhauling, power lines of the two mining cables are disconnected, so that workers can be prevented from directly opening the box cover 2 for overhauling under the condition of forgetting to power off, and the safety performance of the junction box is greatly improved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a mining explosion-proof cable junction box, includes box body (1), its characterized in that: the connecting piece (5) is arranged in the box body (1), the connecting piece (5) comprises a plurality of baffles (52) and a base (51) connected with each baffle (52), and a connecting space (53) for the end part of a power line of a cable to extend in is formed between every two adjacent baffles (52).

2. The mining explosion-proof cable junction box of claim 1, wherein: the connection piece (5) is made of DMC.

3. The mining explosion-proof cable junction box of claim 1, wherein: the wiring space (53) is internally provided with a wiring assembly (6), and the wiring assembly (6) comprises a wiring terminal (63) arranged on the base (51) and a cable pressing sheet (62) arranged on the wiring terminal (63) in a sliding manner.

4. A mining explosion-proof cable junction box according to claim 3, wherein: the base (51) is provided with a base (51) provided with a positioning groove (512), the binding post (63) is provided with a positioning block (631), and the positioning block (631) is inserted into the positioning groove (512).

5. The mining explosion-proof cable junction box of claim 1, wherein: the box cover is characterized by further comprising a box cover (2), wherein a box sealing ring (22) which is used for abutting against the box body (1) is arranged on the box cover (2).

6. The mining explosion-proof cable junction box of claim 1, wherein: the novel box comprises a box body and is characterized by also comprising a box cover (2), wherein the box body (1) and the box cover (2) are made of stainless steel.

7. The mining explosion-proof cable junction box of claim 1, wherein: the novel cable box further comprises a cable sleeve (3) and a connecting structure (4) arranged on the cable sleeve (3), and the cable sleeve (3) is connected with the box body (1) through the connecting structure (4).

8. The mining explosion-proof cable junction box of claim 1, wherein: the wire connection space (53) and the monitoring belt (71) are respectively located at two sides of the base (51), and a protective groove (511) is formed in the side wall of the base (51).

9. A mining explosion-proof cable junction box according to claim 3, wherein: the number of the wiring components (6) arranged in each wiring space (53) is two, and the wiring components (6) further comprise a cable bottom sheet (61) arranged below the cable pressing sheet (62);

each connection space (53) is internally provided with a connection assembly (8), the connection assembly (8) comprises a connection seat (82) which is arranged between the two connection assemblies (6) in a sliding manner, a driving rod (81) which is connected to the connection seat (82), two connection posts (83) which are arranged on the connection seat (82) and two connection clamping pieces (84) which are respectively electrically connected to different cable bottom pieces (61), a box cover (2) is arranged on the box body (1), the driving rod (81) penetrates through and is arranged on the box cover (2) in a sliding manner, the two connection posts (83) are electrically connected, the two connection clamping pieces (84) are respectively used for clamping different connection posts (83), when the connection clamping pieces (84) clamp the connection clamping pieces (83), the connection clamping pieces (83) are electrically connected with the connection clamping pieces (84), the connection seat (82) can move to the two connection posts (83) to be respectively clamped by different connection clamping pieces (84), and the connection seat (82) can also move to the connection clamping pieces (83) to be separated from the connection clamping pieces (84).

10. The mining explosion-proof cable junction box of claim 9, wherein: still include insurance subassembly (9), insurance subassembly (9) include insurance piece (91), set up reset spring (92) on the insurance piece and set up safety cover (93) on insurance piece (91), each actuating lever (81) all connect on insurance piece (91), offer insurance seal groove (23) that supply insurance piece (91) tip inserted on box body (1), be provided with insurance sealing washer (94) on the cell wall of insurance seal groove (23), when the tip of insurance piece (91) is inserted in insurance seal groove (23), insurance sealing washer (94) support the lateral wall of tight insurance piece (91), safety cover (93) cover are established on the tip of box body (1) and lid (2), safety cover (93) and box body (1) joint cooperation, reset spring (92) are in when natural state, link up post (83) and link up clamping piece (84) separation.