CN220122553U - Explosion-proof anticorrosive dust prevention power distribution device - Google Patents

Abstract

The utility model relates to an explosion-proof, corrosion-proof and dust-proof power distribution device, wherein an additional safety box body and an explosion-proof box body are independently arranged and are connected and assembled through a sealant and a bolt locking mechanism, which is equivalent to integrating the two box bodies, so that the explosive gas outside is prevented from entering an explosion-proof cavity, and meanwhile, when explosion occurs in the explosion-proof box body, the problem of secondary injury caused by easy collapse of a channel bolt in the prior art is solved because the sealant covers the bolt locking mechanism, and the additional safety box body and the explosion-proof box body are independently arranged, and when the explosion-proof box body is worn, the explosion-proof box body can be replaced only by dismantling the sealant, the additional safety box body can be continuously used, the service life is prolonged, the enterprise cost is reduced, and the installation is convenient.

Description

Explosion-proof anticorrosive dust prevention power distribution device

Technical Field

The utility model relates to the field of explosion prevention, in particular to an explosion-proof, corrosion-proof and dust-proof power distribution device.

Background

An explosion-proof electrical appliance refers to a type of electrical equipment employed in a location where explosion-dangerous gases and vapors are present. Various gases and vapors with explosion risks are frequently encountered in chemical production, and proper explosion-proof electric appliances are properly selected in places with the mediums according to related specifications, standards and regulations, so that the explosion of surrounding explosive mixtures is prevented, and the explosion-proof electric appliances are important measures for ensuring safe production and preventing explosion and fire occurrence. The explosion-proof signs and technical data are usually also necessary on the explosion-proof appliances to avoid misuse.

The utility model patent of China with the application number of CN 201822254280.5 discloses a novel structure explosion-proof box, which comprises an explosion-proof box body (1), a cable connection terminal (19), an explosion-proof door (12) and an explosion-proof cover (14), wherein a partition plate (3) is arranged in the explosion-proof box body (1), an inner space of the explosion-proof box body (1) is divided into an upper cavity and a lower cavity, the upper cavity and the lower cavity are respectively provided with a main explosion-proof cavity (2) and an increase An Qiang (6), the explosion-proof door (12) and the explosion-proof cover (14) are arranged on the front side of the main explosion-proof cavity (2) from inside to outside, a sealing cover (15) is arranged on the front side of the increase An Qiang (6), the cable connection terminal (19) is arranged on the bottom end of the explosion-proof box body (1), a sealing cylinder (5) is arranged on the partition plate (3), and a sealing glue (11) for separating wires is arranged on the partition plate (3) at the position of the line-passing hole (4). The explosion-proof box with the novel structure adopts a cavity-dividing structure, has small integral explosion-proof volume and high explosion-proof safety coefficient, and is convenient to overhaul and install.

However, in the above-mentioned technique, be equipped with the division board in the explosion-proof box, divide into two upper and lower cavities with explosion-proof box inner space, then be equipped with at least one wire hole on the division board, each wire hole department inserts and sets up sealed section of thick bamboo, it has the sealed glue of separating each wire to water in the sealed section of thick bamboo, this sealed section of thick bamboo can pass through welding or bolt locking structure and connect two cavities, but after this two cavities only pass through the division board and connect, if explosion appears, its whole box can not reuse, in this technical scheme simultaneously, its bolt in the terminal surface exposes outside when pouring, the bolt is easy to separate with the division board when explosion, wear to establish and shine into huge penetration force, bring the potential safety hazard.

Simultaneously still have chinese utility model patent application number CN202221508321.9 and disclose an explosion-proof anticorrosive block terminal, including explosion-proof box, be equipped with one end on the explosion-proof box and be open-ended installation cavity, explosion-proof box can dismantle and be connected with the explosion-proof apron that can shutoff open-ended, its characterized in that: the explosion-proof box is provided with first flange plates distributed on the periphery of the opening of the mounting cavity, and the explosion-proof cover plate is provided with second flange plates corresponding to the first flange plates during assembly.

However, in the above technology, the explosion-proof box is usually made of an aluminum alloy material or a stainless steel plate welded to form an explosion-proof box, but the surface of the aluminum alloy material is easy to be corroded and oxidized by an external medium, so that the corrosion resistance is poor, and the manufacturing cost of the explosion-proof box made of the stainless steel plate welded is very high.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the explosion-proof, corrosion-proof and dust-proof power distribution device which has the advantages of stable connection, better explosion-proof effect, higher connection strength, safety and reusability.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an explosion-proof anticorrosive dust-proof distribution device, includes explosion-proof case and increases the safe case, the explosion-proof case includes the explosion-proof box, sets up explosion-proof chamber and explosion-proof case lid in the explosion-proof box, increase the safe case including increasing the safe box, set up increase the safe chamber and increase the safe case lid in increasing the safe box, increase the safe intracavity and all be equipped with at least one correspondence with the explosion-proof intracavity and set up the wire hole, wire hole department all is equipped with coupling assembling, its characterized in that: the connecting assembly comprises a connecting piece, a bolt locking mechanism and a pouring wall, wherein the connecting piece is arranged outside the security-increasing box body and the explosion-proof box body and communicated with the wire passing hole, the bolt locking mechanism is used for locking the security-increasing box body and the explosion-proof box body after penetrating through the connecting piece, the pouring wall is arranged at the position, corresponding to the wire passing hole, of the security-increasing cavity and the explosion-proof cavity and protruding towards one end far away from the connecting piece, and sealant covering the bolt locking mechanism, the connecting piece and the wire passing hole is poured in a groove of the pouring wall.

By adopting the technical scheme, the safety-increasing box body and the explosion-proof box body are independently arranged and are connected and assembled through the sealant and the bolt locking mechanism, so that the two box bodies are integrated, the explosive gas outside is prevented from entering the explosion-proof cavity, meanwhile, when explosion occurs in the explosion-proof box body, the problem that secondary damage is caused by easy collapse of the channel bolt in the prior art is solved due to the fact that the sealant covers the bolt locking mechanism, and the safety-increasing box body and the explosion-proof box body are independently arranged.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the bolt locking mechanism comprises a plurality of through holes arranged at the casting wall, a channel bolt penetrating through the through holes, and a channel nut connected with the channel bolt, wherein the inner diameter of the through holes is smaller than the outer diameter of the channel nut and the head of the channel bolt.

By adopting the technical scheme, the channel bolt is provided with the screw head, one end of the screw head penetrates through the through hole of one box body and then penetrates out of the through hole of the other box body, and is locked through the channel nut, so that the explosion-proof box body and the safety-increasing box body form an integrated structure, and the assembly is convenient.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the connecting piece is internally provided with a plurality of positioning holes which are opposite to the through holes, the channel bolts penetrate through the positioning holes, and the distance between the positioning holes and the inner wall of the connecting piece is larger than 10mm.

By adopting the technical scheme, the channel bolts penetrate through the positioning holes, so that the distance between the packaging channel bolts and the inner wall of the connecting piece is more than 10mm, and the requirements of the national standard GB/T3836.2-2021 on the width of the bonding joint surface are completely met.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the number of through holes and the number of positioning holes in the safety increasing cavity and the explosion-proof cavity are both 4, the casting wall is of a square structure, the through holes are distributed on the casting wall in a surrounding mode, and step surfaces are formed between the through holes and the casting wall.

By adopting the technical scheme, after the positioning holes are formed into 4 positioning holes, the positioning holes are evenly distributed at the casting wall, the positioning holes are evenly stressed, the connection strength of the casting wall and the sealant is enhanced by the step surface structure, detachment is avoided, and the casting wall is of a square structure formed by encircling, so that leakage during casting of the sealant is avoided.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the end face of the flameproof box body corresponding to the flameproof cover body is provided with a first flameproof surface which is integrally formed with the flameproof box body, the end face of the flameproof cover body corresponding to the flameproof box body is provided with a second flameproof surface which is integrally formed with the flameproof cover body, the outer peripheral surface of the first flameproof surface is extended with a plurality of first mounting plates, the first mounting plates are all provided with first mounting holes, the outer peripheral surface of the second flameproof surface is extended with a plurality of second mounting plates, the second mounting plates are all provided with second mounting holes which are correspondingly arranged with the first mounting holes, the first mounting holes and the second mounting holes are all arranged on the opposite surfaces of the flameproof box body and the flameproof cover body and are connected through connecting bolts, and the outer edge of the second flameproof surface is extended with a second outer edge reverse hook, and the thickness of the second outer edge reverse hook is smaller than that of the second flameproof surface and is matched with the second flameproof surface to form a second outer edge ladder embedded in the flameproof cover body.

By adopting the technical scheme, the explosion-proof cover body and the explosion-proof box body are connected together through the first mounting hole and the second mounting hole between the first explosion-proof surface and the second explosion-proof surface, so that the explosion-proof performance of the contact surface of the explosion-proof cover body and the explosion-proof box body is enhanced through the first explosion-proof surface and the second explosion-proof surface, the second outer edge inverted hook is arranged on the second explosion-proof surface, the second outer edge inverted hook is matched with the second explosion-proof surface to form a second outer edge ladder embedded in the explosion-proof cover body, and the limiting step of the ladder pile is arranged in the forming process of the explosion-proof cover body by arranging the second outer edge ladder, so that the connection strength of the explosion-proof cover body and the second explosion-proof surface is improved, and the explosion-proof cover body cannot fall off.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the inner wall edge of the second explosion-proof surface extends to form a second inner wall barb, the thickness of the second inner wall barb is smaller than that of the second explosion-proof surface, the second inner wall barb is matched with the second explosion-proof surface to form a second inner wall ladder embedded in the explosion-proof cover body, a plurality of positioning seats are arranged on the second explosion-proof surface, positioning guide posts embedded in the explosion-proof cover body are arranged on the positioning seats, and the positioning seats are arranged between the adjacent second mounting plates.

By adopting the technical scheme, through setting up the second inner wall barb, the spacing step second inner wall ladder of ladder stake has been had in the shaping process of messenger's explosion-proof lid, make the inner circle of second flame proof face also increase the area of contact of moulding plastics, make its inside and outside balance, further improve the stability that the second flame proof face is connected, through setting up positioning seat and positioning guide pillar, further increase its connecting surface of moulding plastics with the explosion-proof lid, simultaneously positioning guide pillar is along the explosion-proof lid towards the gradual thick toper structure of explosion-proof box one end, higher joint strength has been had, the drop of second flame proof face has been avoided, through setting up the second mounting panel that supplies the second mounting hole to place, further increased its connecting surface of moulding plastics with the explosion-proof lid, make the interval distribution between positioning guide pillar and the second connecting hole simultaneously, namely, its connecting surface of moulding plastics with the explosion-proof lid has been increased, the joint strength has been improved, the second connecting hole of being weak to everywhere through its both ends positioning guide pillar reinforcing connecting end, its joint strength has been improved, it has been avoided it to break away from, set up the second outer flame proof face of falling off and has been further increased the connecting face of moulding plastics with the second mounting panel along the second mounting panel that the explosion-proof lid after setting up.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the side wall of first flame proof face is equipped with two at least embedded installation awl pieces in the flame proof box, installation awl piece reduces gradually along first flame proof face toward second flame proof face direction, the outside border of first flame proof face extends has first outer edge barb, the thickness of first outer edge barb is less than first flame proof face to form the first outer edge ladder of embedded in the flame proof box with first flame proof face cooperation, the inside border of first flame proof face extends there is a plurality of first inner wall barb, the thickness of first inner wall barb is less than first flame proof face to form the first inner wall ladder of embedded in the flame proof box with first flame proof face cooperation.

By adopting the technical scheme, the mounting cone block is arranged, namely, the injection molding connection surface of the explosion-proof box body and the explosion-proof box body is increased, the connection strength is improved, the mounting cone block, the explosion-proof surface of which is gradually thinned from the lower part, is higher in connection strength, the falling of the first explosion-proof surface is avoided, the first explosion-proof surface is fixedly embedded together through the arrangement of the first outer edge ladder and the first inner wall ladder, the defect that an external extension object of the first explosion-proof surface is easy to fall and the connection strength is insufficient in the prior art is overcome, the first explosion-proof surface and the second explosion-proof surface are made of aluminum alloy materials, the explosion-proof performance of the contact surface between the explosion-proof box body and the explosion-proof cover body is improved, the explosion-proof box body and the explosion-proof cover body can be made of plastic materials capable of preventing corrosion and dust, and the first explosion-proof surface, the second explosion-proof surface, the explosion-proof box body and the explosion-proof cover body can be stably embedded together after being integrally formed through an injection molding process, and the explosion-proof performance is improved, and the explosion-proof performance is not separated.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the safety box comprises a safety box body and is characterized in that a first flange plate distributed on the periphery of an opening of the safety cavity is arranged on the safety box body, a second flange plate corresponding to the first flange plate during assembly is arranged on the safety box cover, a jogging strip protruding towards the outside is arranged on the first flange plate, and a jogging groove matched with the jogging strip is formed in the second flange plate.

By adopting the technical scheme, the periphery of the safety box body and the safety box cover is provided with the first flange plate and the second flange plate, so that the contact area of the safety box body and the safety box cover during assembly is prolonged, the safety box can be more effectively waterproof and dustproof, the embedded strip and the embedded groove are additionally arranged, the waterproof and dustproof effects can be further realized, the safety box body and the safety box cover are convenient to assemble, namely, the safety box body and the safety box cover are convenient to position during assembly, and only the embedded strip and the embedded groove are required to be clamped and connected, the safety box body and the safety box cover are not required to be moved left and right to be aligned and positioned, and then the safety box body and the safety box cover are screwed tightly by screws around.

Foretell an explosion-proof anticorrosive dust prevention distribution device can further set up to: the explosion-proof box further comprises a hinge assembly connected with the explosion-proof box body and the explosion-proof box cover, the explosion-proof box body and the explosion-proof box cover are connected through a plurality of hinge bolts, embedded holes for the hinge bolts are formed in the explosion-proof box body and the explosion-proof box cover, and polygonal nuts are embedded in the embedded holes.

By adopting the technical scheme, the polygonal nut is preferably a hexagonal nut and is embedded into the embedded hole for being fixedly installed and connected with the hinge bolt, when the hinge bolt rotates to connect the hexagonal nut, the outer hexagon of the hexagonal nut can be fixed with the embedded hole, and the hexagonal nut is not driven to rotate by the hinge bolt, so that the problem that the spline nut is easy to loosen during rotation in the past is solved.

The utility model is further described below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is an exploded view of an embodiment of the present utility model.

Fig. 3 is a schematic perspective view of an explosion-proof box and an security-enhanced box according to an embodiment of the present utility model.

Fig. 4 is a schematic plan view of an explosion-proof box and an security-enhanced box according to an embodiment of the present utility model.

Fig. 5 is a cross-sectional view AA of fig. 4.

Fig. 6 is a schematic view illustrating internal connection of a connection assembly according to an embodiment of the present utility model.

FIG. 7 is a schematic diagram illustrating the connection of a hinge assembly to a polygonal nut according to an embodiment of the present utility model.

Detailed Description

As shown in fig. 1-6, an explosion-proof, corrosion-proof and dust-proof distribution device comprises an explosion-proof box and an explosion-proof box, wherein the explosion-proof box comprises an explosion-proof box body 1, an explosion-proof cavity 11 and an explosion-proof box cover 2 which are arranged in the explosion-proof box body, the explosion-proof box comprises an explosion-proof box body 3, an explosion-proof cavity 31 and an explosion-proof box cover 4 which are arranged in the explosion-proof box body 3, at least one corresponding through hole 10 is arranged in the explosion-proof cavity 31 and the explosion-proof cavity 11, a connecting component 5 is arranged at the through hole 10, the connecting component 5 comprises a connecting piece 51 which is arranged outside the explosion-proof box body 3 and the explosion-proof box body 1 and is communicated with the through hole 10, a bolt locking mechanism which is arranged in the connecting piece 51 in a penetrating manner and locks the explosion-proof box body 3 and the explosion-proof box body 1, and a pouring wall 6 which is arranged at the position of the explosion-proof cavity 31 corresponding to the through hole 10 and is protruded far away from one end of the connecting piece 51, the pouring wall 6 is a ladder-type mechanism, and the grooves 61 in the pouring wall are all internally provided with sealing glue (not shown in the figure) covering the bolt locking mechanism, the connecting piece 51 and the wire passing hole 10, the bolt locking mechanism comprises 4 through holes 52 which are arranged at the pouring wall and correspond to the safety increasing cavity 31 and the explosion proof cavity 11, a channel bolt 53 which penetrates through the through holes 52, and a channel nut (not shown in the figure) which is connected with the channel bolt 53, the inner diameter of the through holes 52 is smaller than the outer diameters of the channel nut (not shown in the figure) and the channel bolt head 531, the through holes 52 and the pouring wall 6 form a step surface, 4 positioning holes 511 which are arranged opposite to the through holes 52 are arranged in the connecting piece 51, the channel bolt 53 penetrates into the positioning holes 511, the inner wall spacing between the positioning holes 511 and the connecting piece 51 is larger than 10mm, the sealing glue is ensured to be always at the position of the connecting piece after the arrangement, the requirements of the national standard GB/T3836.2-2021 on the width of the bonding joint surface are met, meanwhile, as the safety-increasing box body 3 and the explosion-proof box body 1 are independently arranged and are connected and assembled with the connecting piece 51 through the sealant and the channel bolt 53, the two box bodies are equivalent to being integrated, the outside explosive gas is prevented from entering the explosion-proof cavity 11, and meanwhile, when explosion occurs in the explosion-proof box body 1, the channel bolt 53 is covered by the sealant, the problem that secondary damage is caused by easy collapse of the channel bolt 53 in the prior art is solved, and the safety-increasing box body 3 and the explosion-proof box body 1 are independently arranged, when the explosion-proof box body 1 is worn, the explosion-proof box body 1 can be replaced only by dismantling the sealant, the safety-increasing box body 3 can be continuously used, the service life is prolonged, and the enterprise cost is reduced.

As shown in fig. 1-2, the end face of the flameproof box body 1 corresponding to the flameproof cover body 2 is provided with a first flameproof surface 7 which is formed integrally with the flameproof box body 1, the end face of the flameproof cover body 2 corresponding to the flameproof box body 1 is provided with a second flameproof surface 8 which is formed integrally with the flameproof cover body 2, the outer peripheral surface of the first flameproof surface 7 is provided with a plurality of first mounting plates 71 in an extending way, the first mounting plates 71 are provided with first mounting holes 711, the outer peripheral surface of the second flameproof surface 8 is provided with a plurality of second mounting plates 81 in an extending way, the second mounting plates 81 are provided with second mounting holes 811 which are arranged corresponding to the first mounting holes 711, the first mounting holes 711 and the second mounting holes 811 are arranged on the opposite surfaces of the flameproof box body 1 and the flameproof cover body 2 and are connected through connecting bolts 21, the outer edge of the second flameproof surface 8 is provided with a second outer edge barb 82 in an extending way, the thickness of the second outer edge barb 82 is smaller than the second flameproof surface 8, and forms a second outer edge ladder embedded in the flameproof cover body 2 with the second flameproof surface 8, a second inner wall inverted hook 83 extends at the inner wall edge of the second flameproof surface 8, the thickness of the second inner wall inverted hook 83 is smaller than that of the second flameproof surface 8, and forms a second inner wall ladder embedded in the flameproof cover body 2 with the second flameproof surface 8, a plurality of positioning seats 84 are arranged on the second flameproof surface 8, positioning guide posts 841 embedded in the flameproof cover body 2 are arranged on the positioning seats 84, the positioning seats 84 are arranged between the adjacent second mounting plates 81, the limiting steps of the ladder piles are arranged in the forming process of the flameproof cover body 2 by arranging the second outer edge ladder and the second inner wall ladder, the defects that the outer part of the second flameproof surface 8 is smooth and easy to drop and the connection strength is insufficient in the prior art are overcome, meanwhile, by arranging the positioning seats 84, the second mounting plates 81 and the positioning guide posts 841, the positioning guide posts 841 and the second connecting holes 811 are distributed at intervals, namely the injection molding connecting surface of the positioning guide posts 841 and the explosion-proof cover body 2 is enlarged, the connecting strength is improved, the connecting ends of the weak second connecting holes 811 are reinforced through the positioning guide posts 841 at the two ends of each second connecting hole, the overall connecting strength is improved, and the separation of the second connecting holes is avoided.

As shown in fig. 1-2, the side wall of the first explosion-proof surface 7 is provided with at least two mounting cone blocks 72 embedded in the explosion-proof box body 1, the mounting cone blocks 72 gradually shrink along the direction from the first explosion-proof surface 7 to the second explosion-proof surface 8, the outer edge of the first explosion-proof surface 7 extends to form a first outer edge inverted hook 73, the thickness of the first outer edge inverted hook 73 is smaller than that of the first explosion-proof surface 7 and is matched with the first explosion-proof surface 7 to form a first outer edge ladder embedded in the explosion-proof box body 1, the inner edge of the first explosion-proof surface 7 extends to form a plurality of first inner wall inverted hooks 74, the thickness of each first inner wall inverted hook 74 is smaller than that of the first explosion-proof surface 7 and is matched with the first explosion-proof surface 7 to form a first inner wall ladder embedded in the explosion-proof box body 1, and through the arrangement of the first outer edge ladder and the first inner wall ladder, the limit step pile is arranged in the forming process of the explosion-proof box body 1, so that the defect that the outer part of the first explosion-proof surface 7 is easy to drop down smoothly and the connection strength is not enough is overcome, and the mounting cone blocks are connected with the mounting cone blocks 72 through the mounting cone blocks, and the mounting cone blocks are connected with the mounting cone blocks 72 in an injection molding mode, and the mounting cone blocks are gradually connected with the explosion-proof surface 1.

As shown in fig. 1-3, the safety box 3 is provided with a first flange plate 32 distributed on the periphery of the opening of the safety box 31, the safety box cover 4 is provided with a second flange plate 41 corresponding to the first flange plate 32 during assembly, the first flange plate 32 is provided with a jogged strip 321 protruding outwards, the second flange plate 41 is provided with a jogged slot 411 capable of being matched with the jogged strip 321, and the periphery of the safety box 3 and the safety box cover 4 is provided with a circle of first flange plate 32 and a circle of second flange plate 41, so that the contact area of the safety box 3 and the safety box cover 4 during assembly is prolonged, the water and dust can be effectively prevented, the jogged strip 321 and the jogged slot 411 are additionally arranged, the water and dust prevention can be further realized, the assembly is convenient, namely the positioning between the safety box 3 and the safety box An Gai body 4 is convenient during the assembly, and the quick installation can be realized only by clamping the jogged strip 321 and the jogged slot 411 without moving the safety box 3 and the safety box An Gai body 4 left and right.

As shown in fig. 1,3 and 7, the explosion-proof box and the safety-increasing box further comprise hinge assemblies 9 for connecting the explosion-proof box body 1 and the explosion-proof box cover 2 and connecting the safety-increasing box body 3 and the safety-increasing box cover 4, the corresponding box bodies (1, 3) and the corresponding cover bodies (2, 4) are connected through a plurality of hinge bolts 91, embedded holes 91 for connecting the hinge bolts (not shown in the drawing) are formed in the corresponding box bodies (1, 3) and the corresponding cover bodies (2, 4), hexagonal nuts 92 are embedded in the embedded holes 91, the problem that the embedded nuts are driven to rotate when the original hinge bolts rotate is solved, and the strength and safety of connection of the hinge assemblies 9 and the corresponding box bodies (1, 3) and the corresponding cover bodies (2, 4) are improved.

Claims (10)

1. The utility model provides an explosion-proof anticorrosive dust-proof distribution device, includes explosion-proof case and increases the safe case, the explosion-proof case includes the explosion-proof box, sets up explosion-proof chamber and explosion-proof case lid in the explosion-proof box, increase the safe case including increasing the safe box, set up increase the safe chamber and increase the safe case lid in increasing the safe box, increase the safe intracavity and all be equipped with at least one correspondence with the explosion-proof intracavity and set up the wire hole, wire hole department all is equipped with coupling assembling, its characterized in that: the connecting assembly comprises a connecting piece, a bolt locking mechanism and a pouring wall, wherein the connecting piece is arranged outside the security-increasing box body and the explosion-proof box body and communicated with the wire passing hole, the bolt locking mechanism is used for locking the security-increasing box body and the explosion-proof box body after penetrating through the connecting piece, the pouring wall is arranged at the position, corresponding to the wire passing hole, of the security-increasing cavity and the explosion-proof cavity and protruding towards one end far away from the connecting piece, and sealant covering the bolt locking mechanism, the connecting piece and the wire passing hole is poured in a groove of the pouring wall.

2. An explosion-proof, corrosion-proof and dust-proof power distribution device according to claim 1, wherein: the bolt locking mechanism comprises a plurality of through holes arranged at the casting wall, a channel bolt penetrating through the through holes, and a channel nut connected with the channel bolt, wherein the inner diameter of the through holes is smaller than the outer diameter of the channel nut and the head of the channel bolt.

3. An explosion-proof, corrosion-proof and dust-proof power distribution device as defined in claim 2, wherein: the connecting piece is internally provided with a plurality of positioning holes which are opposite to the through holes, the channel bolts penetrate through the positioning holes, and the distance between the positioning holes and the inner wall of the connecting piece is larger than 10mm.

4. An explosion-proof, corrosion-proof and dust-proof power distribution device according to claim 3, wherein: the number of through holes and the number of positioning holes in the safety increasing cavity and the explosion-proof cavity are 4, the casting wall is of a square structure, the through holes are distributed on the casting wall in a surrounding mode, and step surfaces are formed between the through holes and the casting wall.

5. An explosion-proof, corrosion-proof and dust-proof power distribution apparatus as set forth in any one of claims 1 to 4, wherein: the end face of the flameproof box body corresponding to the flameproof cover body is provided with a first flameproof surface which is integrally formed with the flameproof box body, the end face of the flameproof cover body corresponding to the flameproof box body is provided with a second flameproof surface which is integrally formed with the flameproof cover body, the outer peripheral surface of the first flameproof surface is extended with a plurality of first mounting plates, the first mounting plates are all provided with first mounting holes, the outer peripheral surface of the second flameproof surface is extended with a plurality of second mounting plates, the second mounting plates are all provided with second mounting holes which are correspondingly arranged with the first mounting holes, the first mounting holes and the second mounting holes are all arranged on the opposite surfaces of the flameproof box body and the flameproof cover body and are connected through connecting bolts, and the outer edge of the second flameproof surface is extended with a second outer edge reverse hook, and the thickness of the second outer edge reverse hook is smaller than that of the second flameproof surface and is matched with the second flameproof surface to form a second outer edge ladder embedded in the flameproof cover body.

6. The explosion-proof, corrosion-proof and dust-proof power distribution device according to claim 5, wherein: the inner wall edge of the second explosion-proof surface extends to form a second inner wall barb, the thickness of the second inner wall barb is smaller than that of the second explosion-proof surface, the second inner wall barb is matched with the second explosion-proof surface to form a second inner wall ladder embedded in the explosion-proof cover body, a plurality of positioning seats are arranged on the second explosion-proof surface, positioning guide posts embedded in the explosion-proof cover body are arranged on the positioning seats, and the positioning seats are arranged between the adjacent second mounting plates.

7. The explosion-proof, corrosion-proof and dust-proof power distribution device according to claim 5, wherein: the side wall of first flame proof face is equipped with two at least embedded installation awl pieces in the flame proof box, installation awl piece reduces gradually along first flame proof face toward second flame proof face direction, the outside border of first flame proof face extends has first outer edge barb, the thickness of first outer edge barb is less than first flame proof face to form the first outer edge ladder of embedded in the flame proof box with first flame proof face cooperation, the inside border of first flame proof face extends there is a plurality of first inner wall barb, the thickness of first inner wall barb is less than first flame proof face to form the first inner wall ladder of embedded in the flame proof box with first flame proof face cooperation.

8. An explosion-proof, corrosion-proof and dust-proof power distribution apparatus as set forth in any one of claims 1 to 4, wherein: the safety box comprises a safety box body and is characterized in that a first flange plate distributed on the periphery of an opening of the safety cavity is arranged on the safety box body, a second flange plate corresponding to the first flange plate during assembly is arranged on the safety box cover, a jogging strip protruding towards the outside is arranged on the first flange plate, and a jogging groove matched with the jogging strip is formed in the second flange plate.

9. An explosion-proof, corrosion-proof and dust-proof power distribution apparatus as set forth in any one of claims 1 to 4, wherein: the explosion-proof box further comprises a hinge assembly connected with the explosion-proof box body and the explosion-proof box cover, the explosion-proof box body and the explosion-proof box cover are connected through a plurality of hinge bolts, embedded holes for the hinge bolts are formed in the explosion-proof box body and the explosion-proof box cover, and polygonal nuts are embedded in the embedded holes.

10. The explosion-proof, corrosion-proof and dust-proof power distribution device according to claim 8, wherein: the safety box further comprises a hinge assembly connected with the safety box body and the safety box cover, the safety box body and the safety box cover are connected through a plurality of hinge bolts, embedded holes for the hinge bolts are formed in the An Xiang body and the safety box cover, and polygonal nuts are embedded in the embedded holes.