CN209948432U

CN209948432U - Three-prevention distribution box

Info

Publication number: CN209948432U
Application number: CN201920837557.9U
Authority: CN
Inventors: 谢宣誓
Original assignee: Ningbo Tianxin Electric Co Ltd
Current assignee: Ningbo Tianxin Electric Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-01-14
Anticipated expiration: 2029-06-04

Abstract

The utility model relates to a block terminal field specifically is a three proofings type block terminal, including mounting bracket, box and a plurality of level arrange the square pipeline inside the box and that the heat conductivity is good, the left end of square pipeline is installed on the interior left side wall of box, the right-hand member of square pipeline is installed on the interior right side wall of box, the inner chamber of square pipeline communicates in the outside of box, all be equipped with a plurality of installation positions from left to right interval on the front surface and the trailing flank of square pipeline; both sides all articulate there is the door plant around the box and the inner chamber of box forms airtight structure through two door plant sealings. The utility model has simple structure and better waterproof and dustproof capacities; by opening the two door plates, the power distribution electrical appliance can be conveniently installed on the installation positions on the front side surface and the rear side surface of the square pipeline; because the inner chamber of square pipeline communicates in the outside of box to make the air on the left and right sides of box circulate through the inner chamber of square pipeline, can dispel the heat to the distribution electrical apparatus who installs on square pipeline.

Description

Three-prevention distribution box

Technical Field

The utility model relates to a block terminal field specifically is a three prevent type block terminals.

Background

Distribution box (cabinet) is a final-stage device of a distribution system and is divided into a power distribution box (cabinet), a lighting distribution box (cabinet) and a metering box (cabinet). Distribution boxes are commonly used in locations where loads are distributed, such as construction sites, residential areas, etc., where electrical energy from a circuit of an upper level distribution facility is distributed to nearby loads and the loads provide protection, monitoring and control.

The three prevention of the three prevention type distribution box refers to water prevention, dust prevention and corrosion prevention. Because generally install more distribution electrical apparatus in the block terminal, distribution electrical apparatus can produce a large amount of heats in the course of the work, if these heats discharge in not time, will influence distribution electrical apparatus and continue to use, so generally leave the louvre on the block terminal that has now so that dispel the heat, but in rainwater, moisture and dust also can get into the block terminal through the louvre, this back of the body with the waterproof nature and the dirt resistance of block terminal mutually, there is the potential safety hazard. Therefore, a three-prevention distribution box is provided.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a three-prevention distribution box to solve the above-mentioned deficiencies in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a three-prevention type distribution box comprises a mounting frame, a box body arranged on the mounting frame and a plurality of square pipelines which are horizontally arranged in the box body and have good heat conductivity, wherein the left end of each square pipeline is arranged on the inner left side wall of the box body, the right end of each square pipeline is arranged on the inner right side wall of the box body, the inner cavity of each square pipeline is communicated with the outside of the box body, and a plurality of mounting positions for mounting distribution electrical appliances are arranged on the front side surface and the rear side surface of each square pipeline at intervals from left to right; the front side and the rear side of the box body are respectively hinged with a door plate, and the inner cavity of the box body is sealed by the two door plates to form a closed structure.

The beneficial effects of the utility model reside in that: the utility model has simple structure and reasonable layout; because the front side and the rear side of the box body are hinged with the door plates, the distribution electrical equipment can be conveniently arranged on the installation positions on the front side surface and the rear side surface of the square pipeline by opening the two door plates; the inner cavity of the box body is sealed by the two door plates to form a closed structure, so that the box body has better waterproof and dustproof capabilities; the inner cavity of the square pipeline is communicated with the outside of the box body, so that an air channel is formed among the left side of the box body, the inner cavity of the square pipeline and the right side of the box body, and the heat of the power distribution electrical appliance installed on the square pipeline can be dissipated.

Preferably, square pipeline about both ends and box between all be equipped with insulating mount pad, insulating mount pad on be equipped with the inner chamber that is used for communicateing square pipeline and the outside through-hole of box, the bottom of through-hole is equipped with and is the water drainage tank that sets up to the outside slope of box, just insulating mount pad on be equipped with and be used for preventing that the foreign matter from getting into the protection grid of through-hole. The advantages are that: under the action of the insulating mounting seat, the electric shock resistance of the box body can be improved, so that the safety of the box body is improved; under the action of the drainage grooves, rainwater can be prevented from accumulating inside the through holes; under the effect of the protection grid, wind can normally pass in and out the through holes, but some larger foreign matters (such as leaves, plastic bags and the like) cannot enter the through holes.

Preferably, a fan is arranged in a through hole in one of the two insulating mounting seats connected with the same square pipeline, and a first blocking mechanism used for blocking an inner cavity opening of the square pipeline is arranged in a through hole in the other insulating mounting seat; the upper side surface of the square pipeline is provided with a plurality of openings communicated with the inner cavity of the square pipeline, and a second plugging mechanism which can be used for plugging the openings is arranged at the positions of the openings on the upper side surface of the square pipeline. The advantages are that: the heat dissipation efficiency can be accelerated.

Preferably, the first blocking mechanism comprises a first mounting plate arranged in the through hole, at least two first positioning pins vertically arranged on the surface of the first mounting plate far away from the inner cavity opening of the square pipeline, a first fixing plate movably arranged on the first positioning pins, a first spring arranged between the first mounting plate and the first fixing plate and used for enabling the first fixing plate to move in the direction far away from the first mounting plate along the first positioning pins, and a first electromagnet arranged on one end of the first positioning pin far away from the first mounting plate and used for driving the first fixing plate to move in the direction towards the first mounting plate along the first positioning pins, wherein a first blocking plate matched with the shape of the inner cavity opening of the square pipeline is arranged on the surface of the first fixing plate facing the through hole. The advantages are that: when the first electromagnet is not electrified, the first fixing plate moves in the direction away from the first mounting plate along the first positioning pin under the action of the first spring, so that the inner cavity opening of the square pipeline can be communicated with the outside of the box body; when the first electromagnet is electrified, the thrust of the first electromagnet to the first fixing plate is greater than the acting force of the first spring to the first fixing plate, so that the first fixing plate moves towards the first mounting plate along the first positioning pin, the inner cavity opening of the square pipeline is blocked, and air cannot enter the inner cavity of the square pipeline.

Preferably, one end of the first plugging plate facing to the inner cavity opening of the square pipeline is provided with a first sealing ring. The advantages are that: the sealing performance of the first plugging plate when the inner cavity opening of the square pipeline is plugged is improved.

Preferably, the second blocking mechanism comprises a second mounting plate arranged on the upper side face of the square pipeline, at least two second positioning pins vertically arranged on the second mounting plate and far away from the opening, a second fixing plate movably arranged on the second positioning pins, a second electromagnet arranged on one end of the second positioning pins far away from the second mounting plate and used for driving the second fixing plate to move in the direction far away from the second mounting plate along the second positioning pins, and a second spring arranged between the second fixing plate and the second electromagnet and used for enabling the second fixing plate to move in the direction towards the second mounting plate along the second positioning pins, wherein the second blocking plate matched with the opening in shape is arranged on the surface of the second fixing plate facing the opening. The advantages are that: when the second electromagnet is not electrified, the second fixing plate moves towards the second mounting plate along the second positioning pin under the action of the second spring, so that the opening is blocked; when the second electromagnet is electrified, attractive force generated by the second electromagnet on the second fixing plate is larger than acting force of the second spring on the second fixing plate, so that the second fixing plate moves in the direction away from the second mounting plate along the second positioning pin, the opening is in an open state at the moment, and air in the inner cavity of the square pipeline and air in the box body can be exchanged.

Preferably, a second sealing ring is installed at one end, facing the opening, of the second plugging plate. The advantages are that: the sealing performance of the second plugging plate when the opening is plugged can be improved.

Preferably, the upper side and the lower side of the square pipeline are both provided with heat conducting blades. The advantages are that: the contact area between the air inside the box body and the square pipeline is increased, so that the heat conductivity is improved, and the heat dissipation efficiency is accelerated.

Preferably, the front side wall and the rear side wall of the inner cavity of the square pipeline are both horizontally provided with radiating blades. The advantages are that: the contact area between the square pipeline and the air in the inner cavity of the square pipeline is increased, so that the heat dissipation efficiency is improved; in addition, because the radiating blades are horizontally arranged, the resistance of air circulation in the inner cavity of the square pipeline can be reduced.

Preferably, an insulating heat-conducting plate is arranged between each mounting position and the square pipeline. The advantages are that: the electric shock resistance of the box body is improved, and therefore the safety of the box body is improved.

Drawings

Fig. 1 and 2 are schematic perspective views of a triple-proof distribution box according to a preferred embodiment of the present invention;

fig. 3 is a schematic perspective view of an insulating mount and a square pipe according to a preferred embodiment of the present invention;

FIG. 4 is a schematic perspective exploded view of FIG. 3;

fig. 5 and 6 are schematic views of a first blocking mechanism according to a preferred embodiment of the present invention;

fig. 7 and 8 are schematic views of a second blocking mechanism according to a preferred embodiment of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present embodiments more clearly, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 8, in an embodiment of the present invention, a triple-proof distribution box includes an installation frame 2, a box body 1 installed on the installation frame 2, an insulating installation seat 5, an insulating heat conduction plate 9, and a plurality of square pipes 4 horizontally arranged inside the box body 1 and having good heat conductivity; the square pipeline 4 is preferably made of aluminum alloy or stainless steel, and has good heat conductivity, high strength and strong corrosion resistance, so that the service life of the square pipeline is prolonged; the left end of the square pipeline 4 is installed on the inner left side wall of the box body 1 through an insulating installation seat 5, namely, the left end of the square pipeline 4 is installed at the right end of the insulating installation seat 5 through a screw (in order to ensure the sealing performance of connection between the square pipeline and the insulating installation seat, a sealing gasket can be additionally plugged between the square pipeline and the insulating installation seat, the same applies below), and then the left end of the insulating installation seat 5 is installed on the inner left side wall of the box body 1 through a screw; the right end of the square pipeline 4 is installed on the inner right side wall of the box body 1 through an insulating installation seat 5, namely the right end of the square pipeline 4 is installed at the left end of the insulating installation seat 5 through a screw, and then the right end of the insulating installation seat 5 is installed on the inner right side wall of the box body 1 through a screw; the insulating mounting seat 5 is provided with a through hole 51 for communicating the inner cavity of the square pipeline 4 with the outside of the box body 1, so that air on the left side and the right side of the box body 1 can circulate through the inner cavity of the square pipeline 4; a plurality of mounting positions (the mounting positions are not marked in the drawing) for mounting distribution electrical equipment are arranged on the front side surface and the rear side surface of the square pipeline 4 at intervals from left to right, the number of the mounting positions on the front side surface and the rear side surface of the square pipeline 4 is preferably four (but not limited to four), each mounting position is separated from the square pipeline 4 through an insulating heat-conducting plate 9, and therefore a mounting position is formed on the end surface, far away from the square pipeline 4, of each insulating heat-conducting plate 9; the front side and the rear side of the box body 1 are hinged with door plates 3 (the door plates 3 are in the prior art and should be provided with door locks 31), so that distribution electric appliances can be conveniently arranged on the front side and the rear side of the square pipeline 4; the inner cavity of the box body 1 is sealed by two door plates 3 to form a closed structure, namely, the matching degree of the joint between the door plates 3 and the box body 1 is high, and a sealing rubber strip is arranged between the door plates 3 and the box body 1 (in the prior art, a pipeline 11 for in-out wiring is arranged at the bottom of the box body 1, and in order to ensure the sealing property of the box body 1, after a line is connected through the pipeline 11, the line is subjected to sealing treatment). The insulating mounting seat 5 is preferably made of ceramic, and has the advantages of good insulating property, high mechanical strength, good heat resistance, good corrosion resistance, good thermal stability and the like, so that the electric shock resistance of the box body 1 is improved, and the service life of the insulating mounting seat 5 is prolonged; the insulating heat conducting plate 9 is preferably made of alumina ceramics, which has good thermal conductivity, insulation, wear resistance and high hardness, so as to improve the electric shock resistance of the box body 1 and prolong the service life of the insulating heat conducting plate 9.

In the embodiment, the bottom of the through hole 51 is provided with the drainage groove 32 which is inclined towards the outside of the box body 1, as shown in fig. 4, under the action of the drainage groove 32, rainwater can be prevented from accumulating inside the through hole 51, so that rainwater accumulated inside the through hole 51 for a long time is prevented from permeating into the box body 1, and the waterproof capability of the box body 1 is further enhanced; insulating mount 5 on be equipped with the protection grid 53 that is used for preventing the foreign matter to get into the through-hole under the effect of protection grid 53, wind can normally pass in and out through-hole 51, but some great foreign matters (such as leaf, plastic bag etc.) can not get into through-hole 51.

In the embodiment, a fan 6 is arranged in a through hole 51 of one of two insulating installation bases 5 connected with the same square pipeline 4 (namely, the fan 6 is firstly installed on a fan installation plate 61 through a screw, then the fan installation plate 61 is installed in the through hole 1 through the screw, and after the fan 6 is started, the air circulation in the inner cavity of the square pipeline 4 can be accelerated; a plurality of openings 41 communicating with the inner cavity of the square pipe 4 are formed on the upper side of the square pipe 4 (since distribution electrical equipment needs to be installed on both the front side and the rear side of the square pipe 4, and rainwater may remain in the square pipe 4, the openings 41 are formed on the upper side of the square pipe 4, and the openings 41 are not formed on the lower side thereof), and the number of the openings 41 on each square pipe 4 is preferably five (but not limited thereto); and a second plugging mechanism 8 for plugging the opening 41 is arranged on the upper side surface of the square pipeline 4 at the position of each opening 41. Under the condition that only one square pipeline 4 is arranged in the box body 1, when the first blocking mechanism 7 does not block the inner cavity opening of the square pipeline 4 and the second blocking mechanism 8 blocks the opening 41, the fan 6 is started to accelerate the air circulation in the square pipeline 4, so that the heat dissipation efficiency is accelerated; when the first blocking mechanism 7 does not block the inner cavity opening of the square pipeline 4 and the second blocking mechanism 8 does not block the opening 41, the fan 6 is started, air in the inner cavity of the square pipeline 4 circulates, and simultaneously, under the action of the five openings 41, air in the box body 1 and air in the inner cavity of the square pipeline 4 are exchanged, so that the heat dissipation efficiency is improved. Under the condition that at least two square pipelines 4 are arranged in the box body 1, one fan 6 can be controlled to be started, one first blocking mechanism 7 opposite to the started fan 6 is controlled to block an inner cavity opening of each square pipeline 4, and then other first blocking mechanisms 7 and all second blocking mechanisms are controlled not to play a blocking role, so that under the action of the started fan 6, air in the inner cavity of each square pipeline 4 connected with the un-started fan 6 enters the box body 1 through an opening 41 in the inner cavity, enters the inner cavity of each square pipeline 4 from the opening in each square pipeline 4 connected with the started fan 6, and is discharged to the outside of the box body 1, so that the air inside and outside the box body 1 is fully exchanged, and the heat dissipation effect is improved.

In the embodiment, the number of the directional pipes 4 is preferably two (but two are laid out), and accordingly, the number of the insulating mounting seats 5 is four, the number of the fans 6 is two, the number of the first blocking mechanisms 7 is two, and the number of the second blocking mechanisms 8 is ten; the fan 6 on one square pipeline 4 is controlled to be started and the first plugging mechanism 7 plays a plugging role, the fan 6 on the other square pipeline 4 is controlled not to be started and the first plugging mechanism 7 does not play a plugging role, and all the second plugging mechanisms 8 are controlled not to play a plugging role, so that the air inside and outside the box body 1 is exchanged, and the effect of accelerating heat dissipation is achieved.

In an embodiment, the first blocking mechanism 7 includes a first mounting plate 71, first positioning pins 72 (the number of the first positioning pins 72 is at least two, and preferably four), a first fixing plate 73, a first spring 74, a first electromagnet 75, a first blocking plate 76, and a first sealing ring 77; the first mounting plate 71 is mounted in the through hole 51 through a screw, and the four first positioning pins 72 are integrally and vertically mounted on the surface of the first mounting plate 71 away from the inner cavity opening of the square pipeline 4; the first fixing plate 73 is movably mounted on the four first positioning pins 72, that is, four holes respectively matched with the four first positioning pins 72 are formed in the first fixing plate 73; the first spring 74 is located between the first fixing plate 73 and the first mounting plate 71 (for convenience of mounting the first spring 74, four first springs 74 may be used to be respectively sleeved on the first positioning pin 72, so that under the action of the first mounting plate 71 and the first fixing plate 73, the four first springs 74 do not need to be fixed), so that the first fixing plate 73 moves in a direction away from the first mounting plate 71 along the first positioning pin 72; the first electromagnet 75 is mounted on one end of the first positioning pin 72, which is far away from the first mounting plate 71, through a screw (a power line of the first electromagnet 75 enters the inside of the box body 1 through the wire passing hole 54 on the insulating mounting base 5 to be electrically connected, and after the power line is electrically connected, the wire passing hole 54 is required to be sealed), the first electromagnet 75 can generate a thrust action on the first fixing plate 73 (a magnet can be fixed on the first fixing plate 73, and the magnetic pole of the magnet is opposite to the homopolar magnetic pole generated by the electrification of the first electromagnet 75, so that the magnet is mutually repelled), and the thrust action is larger than the acting force of the first spring 74 on the first fixing plate 73, so that the first fixing plate 73 moves towards the inner cavity opening direction of the square pipeline 4 along the first positioning pin 72, and further plays a role in blocking; the first blocking plate 76 is preferably made of SIL silicon rubber, is adhered to the surface, facing the through hole 51, of the first fixing plate 73 through adhesive, and is matched with the shape of the inner cavity opening of the square pipeline 4 in shape, so that the service life of the first blocking plate is prolonged due to excellent heat resistance, cold resistance, ozone resistance, atmospheric aging resistance and insulation performance; the first sealing ring 77 is mounted at one end of the first blocking plate 76 facing the inner cavity opening of the square pipeline 4, that is, an annular groove is formed in the first blocking plate 76, so that the first sealing ring 77 is in interference fit in the annular groove; the first sealing ring 77 is preferably made of IIR butyl rubber, which has particularly good air tightness and good heat resistance and insulation, so as to prolong the service life thereof.

In an embodiment, the second plugging mechanism 8 includes a second mounting plate 81, second positioning pins 82 (the number of the second positioning pins 82 is at least two, and preferably four), a second fixing plate 83, a second spring 84, a second electromagnet 85, a second plugging plate 86, and a second sealing ring 87; the second mounting plate 81 is mounted on the upper side surface of the square pipeline 4 through screws, and four second positioning pins 82 are vertically mounted on the surface, far away from the opening 41, of the second mounting plate 81; the second fixing plate 83 is movably mounted on the second positioning pin 82, that is, four holes respectively matched with the four second positioning pins 82 are formed in the second fixing plate 83; the second electromagnet 85 is installed on one end of the second positioning pin 82, which is far away from the second installation plate 81, and the second electromagnet 85 generates attraction force to the second fixing plate 83 after being electrified (that is, a magnet is fixed on the second fixing plate 83, and the magnetic pole of the magnet is opposite to the magnetic pole generated after the second electromagnet 85 is electrified, so as to attract each other), so that the second fixing plate 83 moves towards the opening 41 along the second positioning pin 82; the second spring 84 is installed between the second fixing plate 83 and the second electromagnet 85 through a screw, so that the second fixing plate 83 moves along the second positioning pin 82 in the direction of the second mounting plate 81, and the acting force of the second spring 84 on the second fixing plate 83 is smaller than the attractive force of the second electromagnet 85 on the second fixing plate 83; the material of the second blocking plate 86 is preferably SIL silicone rubber, which is adhered to the surface of the second fixing plate 83 facing the opening 41 through adhesive, and the shape of the second blocking plate is matched with that of the opening 41, so that the service life of the second blocking plate is prolonged due to excellent heat resistance, cold resistance, ozone resistance, atmospheric aging resistance and insulating property; the second sealing ring 87 is mounted at one end of the second blocking plate 86 facing the opening 41, that is, an annular groove is formed in the second blocking plate 86, so that the second sealing ring 87 is in interference fit in the annular groove, and the second sealing ring 87 is preferably made of an IIR butyl rubber sealing ring, so that the second sealing ring is particularly good in air tightness, good in heat resistance and good in insulating property, and the service life of the second sealing ring is prolonged.

In the embodiment, the upper side and the lower side of the square pipeline 4 are both provided with the heat conducting blades 42, as shown in fig. 3, under the action of the heat conducting blades, the contact area between the air inside the box 1 and the square pipeline 4 is increased, so that the heat conductivity is increased, and the heat dissipation efficiency is further increased.

In the embodiment, the front side wall and the rear side wall of the inner cavity of the square pipeline 4 are both horizontally provided with the radiating blades 43, as shown in fig. 4, under the action of the radiating blades, the contact area between the inner cavity wall of the square pipeline 4 and the air therein is increased, so that the radiating efficiency is accelerated; in addition, because the heat dissipating blades 43 are horizontally arranged, the resistance of the heat dissipating blades 43 to the air circulation in the inner cavity of the square pipeline 4 can be reduced.

In the embodiment, the device also comprises a PLC arranged in the box body 1, a temperature sensor arranged in the box body 1, a humidity sensor arranged outside the box body 1 and a dust sensor arranged outside the box body 1, wherein the temperature sensor is used for detecting the temperature in the box body 1 and transmitting a detected signal to the PLC; the humidity sensor is used for detecting the humidity of the air outside the box body 1 and transmitting a detected signal to the PLC; the dust sensor is used for detecting the concentration of dust outside the box body 1 and transmitting a detected signal to the PLC; the PLC is configured to receive signals detected by the temperature sensor, the humidity sensor, and the dust sensor, and may be configured to control the start and stop of the fan 6 and the power on and off of the first electromagnet 75 and the second electromagnet 85, respectively.

The working principle is as follows: the door plates 3 on the front side and the rear side of the box body 1 are respectively opened, so that distribution electric appliances can be conveniently installed on the insulating heat-conducting plates 9 on the front side and the rear side of the square pipeline 4;

when the temperature sensor detects that the temperature inside the box body 1 is low, the fan 6 is controlled to be not started through the PLC, the first electromagnet 75 and the second electromagnet 85 are ensured not to be electrified, under the action of the first spring 74 (the first fixing plate 73 moves towards the direction far away from the inner cavity opening of the square pipeline 4 along the first positioning pin 72, so that the inner cavity of the square pipeline 4 is communicated with the outside of the box body) and the action of the second spring 84 (the second fixing plate 83 moves towards the opening 41 along the second positioning pin 82, so that the second blocking plate 86 blocks the opening 41), the inside of the box body 1 is of a closed structure, air circulates in the inner cavity of the square pipeline 4 through the through hole 51, so that the inside of the box body 1 is radiated (the heat inside of the box body 1 is conducted onto the square pipeline 4 and exchanges heat with the air in the inner cavity of the square pipeline 4), and the sealing performance of the box body 1 is ensured, thereby improving the waterproof and dustproof capacity;

when the temperature sensor detects that the temperature in the box body 1 is high, and when the humidity sensor detects that the humidity is high or the dust sensor detects that the dust concentration is high, the PLC controls the two fans 6 to be started, and the first electromagnet 75 and the second electromagnet 85 are ensured not to be electrified, at the moment, the inside of the box body 1 is still in a closed structure, and under the action of the fans 6, air flows in the inner cavity of the square pipeline 4 through the through holes 51 at an accelerated speed, so that heat on the inner cavity wall of the square pipeline 4 is taken away, and the heat dissipation efficiency of the box body 1 is improved;

when the temperature sensor detects that the temperature inside the box 1 is high, and when the humidity sensor detects that the humidity is low and the dust sensor detects that the dust concentration is low, the PLC controls the fan 6 on the left side of one square pipe 4 located above (according to the principle of thermal expansion and cold contraction, the gas with high temperature floats up) to start, and to energize the first electromagnet 75 on the right side thereof (when the first electromagnet 75 is energized, the magnetic field generated by the repulsion generates repulsion to the magnet on the first fixing plate 73, and the repulsion is greater than the elastic force of the first spring 74, so as to push the first fixing plate 73 to move in the direction of the inner cavity opening of the square pipe 4 along the first positioning pin 72, as shown in fig. 5, the change is shown in fig. 6, so that the first blocking plate 76 and the first sealing ring 77 can block the inner cavity opening of the square pipe 4) and to energize all the second electromagnets 85 (when the second electromagnet 85 is energized, the magnetic field generated thereby generates an attractive force to the magnet on the second fixing plate 83, and the attractive force is greater than the elastic force of the second spring 84, thereby attracting the second fixing plate 83 to move in the direction away from the opening 41 along the second positioning pin 82, as shown in the change from figure 7 to figure 8, and the opening 41 is opened, air outside the box body 1 enters the inner cavity of the square pipeline 4 positioned at the lower part under the action of the starting fan 6, then enters the box body 1 through the opening 41 on the box body, and leads the high-temperature gas in the box body 1 to enter the inner cavity of the square pipeline 4 from the opening on the square pipeline 4 positioned above and then be discharged to the outside, thus leading the air inside and outside the box body 1 to be fully exchanged, thereby the maximum efficiency dispels the heat to the box, moreover because the humidity and the dust concentration of box 1 outside are all lower, so can not influence box 1's waterproof dustproof ability.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The three-prevention distribution box comprises a mounting rack (2) and a box body (1) installed on the mounting rack (2), and is characterized by further comprising a plurality of square pipelines (4) which are horizontally arranged inside the box body (1) and have good heat conductivity, wherein the left ends of the square pipelines (4) are installed on the inner left side wall of the box body (1), the right ends of the square pipelines (4) are installed on the inner right side wall of the box body (1), the inner cavity of each square pipeline (4) is communicated with the outside of the box body (1), and a plurality of installation positions for installing distribution electrical appliances are arranged on the front side surface and the rear side surface of each square pipeline (4) at intervals from left to right; the front side and the rear side of the box body (1) are respectively hinged with a door plate (3), and the inner cavity of the box body (1) is sealed by the two door plates (3) to form a closed structure.

2. The three-prevention distribution box according to claim 1, wherein insulation mounting seats (5) are arranged between the left end and the right end of the square pipeline (4) and the box body (1), through holes (51) used for communicating the inner cavity of the square pipeline (4) with the outside of the box body (1) are formed in the insulation mounting seats (5), drainage grooves (52) which are obliquely arranged towards the outside of the box body (1) are formed in the bottoms of the through holes (51), and protective grids (53) used for preventing foreign matters from entering the through holes (51) are arranged on the insulation mounting seats (5).

3. The three-prevention distribution box according to claim 2, wherein a fan (6) is arranged in the through hole (51) of one insulating mounting seat (5) of the two insulating mounting seats (5) connected with the same square pipeline (4), and a first blocking mechanism (7) capable of blocking the inner cavity opening of the square pipeline (4) is arranged in the through hole (51) of the other insulating mounting seat (5); the upper side surface of the square pipeline (4) is provided with a plurality of openings (41) communicated with the inner cavity of the square pipeline, and a second plugging mechanism (8) which can be used for plugging the openings (41) is arranged at the position of each opening (41) on the upper side surface of the square pipeline (4).

4. The three-prevention distribution box according to claim 3, wherein the first blocking mechanism (7) comprises a first mounting plate (71) arranged in the through hole (51), at least two first positioning pins (72) vertically arranged on the surface of the first mounting plate (71) far away from the inner cavity opening of the square pipeline (4), a first fixing plate (73) movably arranged on the first positioning pins (72), a first spring (74) arranged between the first mounting plate (71) and the first fixing plate (73) and used for enabling the first fixing plate (73) to move towards the direction far away from the first mounting plate (71) along the first positioning pins (72), and a first electromagnet (75) arranged on one end of the first positioning pins (72) far away from the first mounting plate (71) and used for driving the first fixing plate (73) to move towards the first mounting plate (71) along the first positioning pins (72), the surface of the first fixing plate (73) facing the through hole (51) is provided with a first blocking plate (76) matched with the shape of the inner cavity opening of the square pipeline (4).

5. The three-prevention distribution box according to claim 4, wherein the first blocking plate (76) is provided with a first sealing ring (77) at one end facing the inner cavity opening of the square pipeline (4).

6. The three-defense distribution box according to claim 3, wherein the second blocking mechanism (8) comprises a second mounting plate (81) arranged on the upper side of the square pipe (4), at least two second positioning pins (82) vertically arranged on the surface of the second mounting plate (81) far away from the opening (41), a second fixing plate (83) movably arranged on the second positioning pins (82), a second electromagnet (85) arranged on one end of the second positioning pins (82) far away from the second mounting plate (81) and used for driving the second fixing plate (83) to move along the second positioning pins (82) towards the direction far away from the second mounting plate (81), and a second spring (84) arranged between the second fixing plate (83) and the second electromagnet (85) and used for enabling the second fixing plate (83) to move along the second positioning pins (82) towards the second mounting plate (81), and a second blocking plate (86) matched with the shape of the opening (41) is arranged on the surface, facing the opening (41), of the second fixing plate (83).

7. The triple-proof electrical distribution box according to claim 6, wherein a second sealing ring (87) is mounted on the end of the second blanking plate (86) facing the opening (41).

8. The electrical distribution box of claim 1, wherein said square conduit (4) is provided with heat conducting fins (42) on both the upper and lower sides thereof.

9. The triple-proof distribution box according to claim 1, wherein the front and rear side walls of the inner cavity of the square pipe (4) are horizontally provided with radiating blades (43).

10. The electrical distribution box according to claim 1, characterized in that an insulating and heat-conducting plate (9) is arranged between each mounting position and the square pipe (4).