CN111129977B

CN111129977B - Movable switch cabinet

Info

Publication number: CN111129977B
Application number: CN202010074338.7A
Authority: CN
Inventors: 赵勇
Original assignee: Yueqing Taiboheng Electronic Technology Co Ltd
Current assignee: Jiangsu Chengqiang Electric Technology Co.,Ltd.
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-10-30
Anticipated expiration: 2040-01-22
Also published as: CN112134159A; CN111129977A; CN112260110A

Abstract

The invention discloses a movable switch cabinet which comprises a cabinet body, a controller and a wire holder, wherein the controller is arranged in the cabinet body, the wire holder is arranged on the surface of the cabinet body, the controller is electrically connected with the wire holder, and wheels are arranged at the bottom of the cabinet body. The cubical switchboard still includes two ventilation unit, and the side of the cabinet body sets up two ventiducts, and the ventilation unit includes air inlet filter core, axial fan, air-flow tube, and air inlet filter core and axial fan all set up in the ventiduct, and the air inlet filter core is close to outside atmospheric one side in the ventiduct, and axial fan is in the one side that is close to the controller in the ventiduct, and two axial fan are positive and negative to be changeed in turn, and when one axial fan was toward the internal air-blowing of cabinet, another was supplied air toward outside atmosphere. The air flow pipe is located cabinet body inside, and the air flow pipe includes tuber pipe and return air duct down, and tuber pipe and return air duct one end are gathered and are connected in the inside end of ventiduct, and the tuber pipe other end extends down to the bottom of cabinet body, and the terminal position of giving vent to anger of tuber pipe has the pressure-distributing valve down.

Description

Movable switch cabinet

Technical Field

The invention relates to the field of switch cabinets, in particular to a movable switch cabinet.

Background

The switch cabinet is an electrical device, is connected with an electrical circuit, and provides functions such as instrument data integration, automatic control, on-off stopping, signal remote transmission and the like for the circuit.

In the prior art, a switch cabinet is generally fixedly used, circuits in some places are not frequently used, but the control is complicated, so that a plurality of switch cabinets are in an idle state.

Moreover, when the switch cabinet works, the heat emitted by the controller in the switch cabinet needs to be taken away in time, otherwise the service life of the switch cabinet is influenced, and even the switch cabinet is damaged. Switch cabinets generally only draw ambient air into the cabinet body and then vent it to complete the heat dissipation step, which can introduce a significant amount of ambient dust into the device and can affect the proper use of the electrical components if there is a significant amount of ambient moisture.

Disclosure of Invention

The invention aims to provide a movable switch cabinet to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a movable switch cabinet comprises a cabinet body, a controller and a wire holder, wherein the controller is arranged in the cabinet body, the wire holder is arranged on the surface of the cabinet body, the controller is electrically connected with the wire holder, and wheels are arranged at the bottom of the cabinet body.

The universal wheel of taking the brake block is set up to cabinet body bottom, can remove to suitable position with the cubical switchboard when needs, and wiring and debugging control are carried out again, and outside wiring passes through the connection terminal and is connected to the cubical switchboard on, then, the cubical switchboard plays conventional functions such as circuit control and break-make execution. The controller is a control center formed by common electrical elements such as a switch, a logic switch, a PLC and the like.

Further, the cubical switchboard still includes two ventilation unit, and the side of the cabinet body sets up two ventiducts, and the ventilation unit includes air inlet filter core and axial fan, and air inlet filter core and axial fan all set up in the ventiduct, and the air inlet filter core is in the one side that is close to outside atmosphere in the ventiduct, and axial fan is in the one side that is close to the controller in the ventiduct, and two axial fan are positive and negative to be changeed in turn, and when one axial fan was toward the internal air-blowing of cabinet, another was toward outside atmosphere air supply.

The controller can generate heat in the operation process, and if the heat is not discharged in time, the reliable use of the switch cabinet can be influenced, the ventilation is not smooth, and even the electric appliance is burnt out, so that fresh air is conveyed to the interior of the cabinet body for cooling through the ventilation unit.

The air inlet filter element can filter dust and water vapor in air to enter the cabinet body, the air inlet filter element can be made of activated carbon materials or can be of other layered filter screen structures and filter dust to absorb most of the water vapor in the air so that the air entering the cabinet body is clean and low in humidity, the controller is fully protected and the dust or the water vapor is prevented from being accumulated, the axial flow fan is used for supplying and discharging air, the two ventilation units alternately change the operation directions, one ventilation unit supplies air to the cabinet body while the other ventilation unit supplies air to the cabinet body, the axial flow fan can change the direction of the air to be blown, thus when one air inlet filter element is used as an air inlet, the other air inlet filter element is an air outlet, higher-temperature air which brings out a large amount of heat of the controller is discharged from the cabinet body, and the higher-temperature air passes through the air inlet filter element from inside to outside, not only blows away the dust of collecting at this air inlet filter core atmosphere side in last cycle, also can take away the steam in this air inlet filter core through the hot gas flow for this air inlet filter core returns the filter core part of higher performance again, and the dust that is used for filtering off on the air inlet filter core of air inlet on this cycle and absorptive steam are blown away when exchanging two axial fan flow directions next time, and is gone on in turn, prevents that dust, steam from piling up for a long time.

Further, the ventilation unit still includes the air current pipe, the air current pipe is located the internal portion of cabinet, the air current pipe is including lower tuber pipe and return air duct, tuber pipe and return air duct one end are gathered and are connected at the inside end of ventiduct down, the tuber pipe other end extends down to the internal bottom of cabinet down, be equipped with the flow direction on the tuber pipe down for following the ventiduct toward the internal check valve of cabinet, the return air duct other end sets up the return air inlet and is located the internal top of cabinet, be equipped with the flow direction on the return air duct for following the internal check valve toward the ventiduct of cabinet, the terminal position department of tuber pipe is equipped with a plurality of venthole down, have the pressure distributing valve on the venthole, the first section of tuber pipe is buckled and is gone forward and then down.

The air entering the cabinet body is cold air firstly, and becomes hot air after absorbing the heat emitted by the controller, and the hot air is easy to accumulate at the top of the cabinet body, so that fresh air is led to the lower part in the cabinet body, and the discharge part of the hot air is arranged at the upper part in the cabinet body, so that the cold air flows in the cabinet body from bottom to top, and when the cold air flows from bottom to top, the heat of the controller is absorbed, the heat exchange is completed, the cold air is fully utilized, the discharged air is the hot air, if the inlet and outlet positions are reversed, the cold air possibly directly falls to the bottom of the cabinet body, and then the discharge device is out, a large amount of hot air is accumulated at the upper part in the cabinet body, and the heat exchange of the controller is influenced.

The air supply flow paths of the two ventilation units inwards extend inwards in a split mode, the downpipe is used as a downwind channel leading to the bottom in the cabinet body when the downpipe is used for the ventilation unit at the position to supply air to the cabinet body, the return pipe is used for the next period, when the ventilation unit at the position is used as an air outlet, the return pipe sucks hot air from the top in the cabinet body and discharges the hot air to the outside, the hot air is respectively used as an air inlet and outlet pipeline of the ventilation unit, during shunting, check valves are arranged on the downpipe and the return pipe respectively for preventing channeling, and the check valves are used for determining the flow direction of the pipeline and preventing backflow and channeling.

Set up the distributing valve on the exhaust vent of tuber pipe bottom down respectively, can play fresh air's cooling effect, the principle is: taking the air inlet of the left ventilation unit and the air outlet of the right ventilation unit as an example, the pressure distribution valve has local resistance, the left axial flow fan blows air into the cabinet body, due to the existence of the pressure distribution valve, the air pressure on a lower air pipe pipeline from the axial flow fan to the pressure distribution valve can rise, namely, the compression process is carried out, the rising degree depends on the resistance of the pressure distribution valve, the air is compressed on a lower air pipe section, the temperature rises, because the first section of the lower air pipe bends to advance to the front of an air return passage on another ventilation unit and then extends downwards, the air outlet flow at the top in the cabinet body blows on the pipe wall of the lower air pipe, although the air outlet flow at the top in the cabinet body is higher temperature air flow which is subjected to heat exchange with the controller, the pressure is lower, the temperature is not higher than the air temperature in the compressed lower air pipe section, so the air outlet flow can also take away the heat of the air in, the air suddenly reduces through distribution valve back pressure in the leeward, and the pressure release discharges, and the temperature is greatly reduced also, because it has experienced a cooling in the leeward, so, gas after the distribution valve is released, the temperature can be less than from the temperature (outside atmosphere) when the ventilation unit inhales, promptly, the use is less than ambient temperature's gas and cools down the controller, compares and dispels the heat in direct service environment temperature's gas, can show the reinforcing radiating effect.

Further, the controller is hollow triangular prism shape, and the air outlet end of the lower air pipe surrounds the bottom of the controller and is provided with an air outlet in the center of the controller.

The controller is hollow triangular prism shape, and its inside central authorities have vertical ascending passageway, and the space around adding the cabinet is internal to ascending gas can fully cool off the controller, and original controller mostly is back-to-back or pile up together, and density is big, is difficult for the heat dissipation.

Furthermore, the return air inlet is a trumpet-shaped or conical suction inlet, and the lower air pipe comprises a section of coil pipe which is positioned in front of the return air inlet on the other ventilation unit.

The trumpet-shaped or conical air return opening can enlarge the air suction range, airflow flows at a high flow rate in a large space, and the length of the lower air pipe in front of the air return opening is increased due to the addition of the coil pipe, so that the compressed air in the lower air pipe is cooled more.

Further, the wire holder includes a fuse, and the fuse is as the first on-off switch that this cubical switchboard and outside electricity are connected. Because this cubical switchboard is portable, by frequent change service position and operating mode, so, probably overload because electric load information acquisition is incomplete and use, if do not protect, probably the device damages appear. The fuse serves as a first on-off switch electrically connected with the outside of the switch cabinet, and can perform overload protection in time.

Furthermore, the fuse comprises a shell, binding posts and a fusible core, wherein the two ends of the shell are provided with four binding posts, every two binding posts are arranged on two planes in a group, the shell is filled with the fusible core occupying one third to one half of the volume of the shell, and the part of the shell except the fusible core is vacuumized or filled with inert gas.

The fuse is usually a cylindrical section made of low-melting-point metal, but after the fuse is fused, the fuse needs to be replaced, and if the fuse is not backed up on site, even if circuit faults are eliminated, the fuse cannot be powered on in time.

The fuse core is filled in the shell, four binding posts are arranged outside the shell, so that the fuse can be recycled, firstly, the binding posts on two sides of the upper layer are used for wiring, the originally solid fuse core in the shell is used as a conductor, the circuit is communicated, when the circuit is overloaded and the current is overlarge, the fuse core serving as a conductor is melted to be liquid, flows downwards and is accumulated on the lower part in the shell, the binding posts on two ends of the upper layer are electrically connected and disconnected, the fuse operation is completed, after a period of time, the fuse core on the lower part in the shell is solidified into the solid again, after the circuit fault is eliminated, the fuse core only needs to be taken out and turned upside down, the fuse core can be used as a new fuse again, when the current flows in the next period, the fuse core is melted again and then becomes the liquid state to flow downwards, and the circuit is. The residual space in the shell is vacuumized or filled with inert gas to protect the fusible core as the elemental state of metal.

Further, the fusible core is metallic sodium. The melting point of sodium is 98 ℃, and the temperature is proper.

Compared with the prior art, the invention has the beneficial effects that: the wheels are arranged at the bottom of the switch cabinet, so that the use position is convenient to transfer, and perfect automatic control can be provided for multiple positions; through the arrangement of the two ventilation units, the ventilation units alternately operate, the air inlet filter element plays a role in filtering dust and water vapor in one period, the dust and the water vapor are flushed away by reverse higher-temperature air flow in the next period, and a good filtering state is kept; the air entering the cabinet body is compressed on the lower air pipe firstly, the temperature of the compressed air is high, the air is blown to the outer wall of the pipe by the air outlet flow at the air return opening of the other ventilation unit, the temperature is reduced for the first time, the air in the lower air pipe is released at the pressure distribution valve, the pressure is suddenly reduced, the temperature is reduced to be lower than the temperature of the atmosphere outside the switch cabinet, and therefore good heat dissipation is provided for the controller; the fuse loads a metal simple substance with a proper melting point through the shell, and the double-layer binding posts can be used alternately, so that the fuse does not need to be backed up, and the fuse can be quickly electrified for use after a circuit fault is eliminated.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is view A of FIG. 1;

FIG. 3 is a schematic diagram of the operation of the present invention;

FIG. 4 is a schematic perspective view of the cabinet and the controller of the present invention;

FIG. 5 is a schematic perspective view of the present invention;

FIG. 6 is a schematic diagram of the external shape of the fuse of the present invention;

fig. 7 is a sectional structural view of the fuse of the present invention.

In the figure: 1-cabinet body, 11-ventilation duct, 2-controller, 3-wire holder. 31-fuse, 311-shell, 312-binding post, 313-fusible core, 4-ventilation unit, 41-air inlet filter element, 42-axial flow fan, 43-airflow pipe, 431-lower air pipe, 4311-coil pipe, 432-air return pipe, 4321-air return opening, 5-check valve and 6-pressure distribution valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, a movable switch cabinet comprises a cabinet body 1, a controller 2 and a wire holder 3, wherein the controller 2 is arranged in the cabinet body 1, the wire holder 3 is arranged on the surface of the cabinet body 1, the controller 2 is electrically connected with the wire holder 3, and wheels are arranged at the bottom of the cabinet body 1.

The universal wheel of taking the brake block is set up to cabinet body 1 bottom, can remove the cubical switchboard to suitable position when needing, and wiring and debugging control are carried out again, and outside wiring passes through connection terminal 3 and is connected to the cubical switchboard on, then, the cubical switchboard plays conventional functions such as circuit control and break-make execution. The controller 2 is a control center formed by electrical elements such as a common switch, a logic switch, a PLC and the like.

As shown in fig. 1, the switch cabinet further includes two ventilation units 4, two ventilation ducts 11 are disposed on the side surface of the cabinet body 1, the ventilation units 4 include an air inlet filter element 41 and an axial flow fan 42, the air inlet filter element 41 and the axial flow fan 42 are both disposed in the ventilation ducts 11, one side of the air inlet filter element 41 in the ventilation ducts 11, which is close to the outside atmosphere, the axial flow fan 42 in the ventilation ducts 11, which is close to the controller 2, the two axial flow fans 42 alternately rotate forward and backward, and when one axial flow fan 42 blows air into the cabinet body 1, the other blows air into the outside atmosphere.

The controller can generate heat in the operation process, and if the heat is not discharged in time, the reliable use of the switch cabinet can be influenced, the ventilation is not smooth, and even the electric appliance is burnt out, so that fresh air is conveyed into the cabinet body 1 through the ventilation unit 4 for cooling.

The air inlet filter element 41 can filter dust and water vapor in air to enter the cabinet 1, the air inlet filter element 41 can be made of activated carbon materials or other layered filter screen structures to filter dust and absorb most of the water vapor in the air, so that the air entering the cabinet 1 is clean and low in humidity, the controller 2 is fully protected, dust accumulation or water vapor entering is prevented, the axial flow fan 42 is used for supplying and discharging air power, the two ventilation units 4 alternately change the operation direction, when one ventilation unit 4 supplies air to the cabinet 1, the other ventilation unit 4 supplies air, the axial flow fan 42 can change the blowing direction of the air by changing the turning direction, in this way, when one air inlet filter element 41 is used as an air inlet, the other air inlet filter element 41 is an air outlet, and the air discharged from the cabinet 1 is high-temperature air with a large amount of heat of the controller 2, the air with higher temperature passes through the air inlet filter element 41 from inside to outside, not only blows away the dust accumulated on the atmosphere side of the air inlet filter element 41 in the last period, but also can take away the water vapor in the air inlet filter element 41 through the hot air flow, so that the air inlet filter element 41 returns to the filter element part with higher performance again, and the dust and the absorbed water vapor filtered off from the air inlet filter element 41 used for air inlet in the period are blown away when the flow directions of the two axial flow fans 42 are exchanged next time, which is performed alternately, thereby preventing the dust and the water vapor from being accumulated for a long time.

As shown in fig. 2 and 3, the ventilation unit 4 further includes an airflow pipe 43, the airflow pipe 43 is located inside the cabinet 1, the airflow pipe 43 includes a lower air pipe 431 and a return air pipe 432, one end of the lower air pipe 431 and one end of the return air pipe 432 are connected to the inside end of the air duct 11 in a gathering manner, the other end of the lower air pipe 431 extends downward to the bottom inside the cabinet 1, a check valve 5 is arranged on the lower air pipe 431 and flows from the air duct 11 into the cabinet 1, a return air port 4321 is arranged at the other end of the return air pipe 432 and is located at the top inside the cabinet 1, a check valve 5 is arranged on the return air pipe 432 and flows from the cabinet 1 into the air duct 11, a plurality of air outlets are arranged at the end of the lower air pipe 431, a pressure distribution valve 6 is arranged on the air outlets, and the first section of the lower air pipe 431 bends to advance to the air passage 4321.

The air entering the cabinet body 1 is cold air firstly, and becomes hot air after absorbing the heat emitted by the controller 2, and the hot air is easy to accumulate at the top in the cabinet body 1, so that fresh air is led to the lower part in the cabinet body 1, and the discharge part of the hot air is arranged at the upper part in the cabinet body 1, so that the cold air flows in the cabinet body 1 from bottom to top, and when the cold air flows from bottom to top, the heat of the controller 2 is absorbed, heat exchange is completed, the cold air is fully utilized, the discharged air is the hot air, if the inlet and outlet positions are reversed, the cold air can directly fall to the bottom of the cabinet body 1, and then the cold air is discharged out of the device, a large amount of hot air is accumulated at the upper part in the cabinet body 1, and the heat exchange of the controller.

The air supply flow paths of the two ventilation units 4 inwards extend inwards in a split manner, the lower air pipe 431 is used as a lower air passage leading to the bottom in the cabinet body 1 when the ventilation unit 4 where the lower air pipe is located supplies air into the cabinet body 1, the return air pipe 432 is used in the next period, when the ventilation unit 4 where the lower air pipe is located serves as an air outlet, the return air pipe 432 sucks hot air from the top in the cabinet body 1 and discharges the hot air to the outside, the hot air is respectively used as an air inlet and outlet pipeline of the ventilation unit 4, during flow splitting, in order to prevent cross flow, check valves 5 are respectively arranged on the lower air pipe 431 and the return air pipe 432 and used for determining the flow direction of the pipeline, and.

Set up distributing valve 6 on the exhaust vent of tuber pipe 431 bottom down respectively, can play fresh air's cooling effect, the principle is: as shown in fig. 3, for example, the left ventilation unit 4 supplies air and the right ventilation unit 4 supplies air, the pressure distribution valve 6 has local resistance, the left axial flow fan blows air into the cabinet 1, due to the existence of the pressure distribution valve 6, the air pressure in the pipeline from the axial flow fan 42 to the lower air pipe 431 of the pressure distribution valve 6 rises, that is, the compression process is performed, the rising degree depends on the resistance of the pressure distribution valve 6, the air is compressed on the section of the lower air pipe 431, the temperature rises, because the first section of the lower air pipe 431 bends to advance to the front of the air passage of the air return port 4321 on the other ventilation unit 4 and then extends downwards, the air flow at the top inside the cabinet 1 blows on the pipe wall of the lower air pipe 431, although the air flow at the top inside the cabinet 1 is the higher temperature air flow which has undergone heat exchange with the controller 2, the pressure is lower, and the temperature is not higher than the air temperature in the section of the compressed lower air, so, the air-out air current can also take away the heat of some tuber pipe 431 internal air down, the air reduces in the tuber pipe 431 pressure suddenly after passing through distributing valve 6 down, the pressure release is discharged, the temperature is greatly reduced also, because it has experienced a cooling down in tuber pipe 431 down, so, the gas after distributing valve 6 releases, the temperature can be less than from the temperature (outside atmosphere) when ventilation unit 4 inhales, namely, the use is less than ambient temperature's gas and cools down controller 2, compare and dispel the heat in direct service environment temperature's gas, can show the reinforcing radiating effect.

As shown in fig. 4 and 5, the controller 2 is a hollow triangular prism, the air outlet end of the downpipe 431 surrounds the bottom of the controller 2, and an air outlet is disposed in the center of the controller 2.

Controller 2 is hollow triangular prism form, and its inside central authorities have vertical ascending passageway, and the space around adding in the cabinet body 1 to ascending gas can fully cool off controller 2, and original controller 2 is back to back or pile up together mostly, and density is big, is difficult for the heat dissipation.

As shown in fig. 5, the air return opening 4321 is a trumpet-shaped or cone-shaped suction opening, and the lower duct 431 includes a section of coiled pipe 4311 located in front of the air return opening 4321 of the other ventilation unit 4.

The trumpet-shaped or cone-shaped air return opening 4321 can enlarge the air suction range, airflow flows at a large flow speed in a large space, and the length of the lower air pipe 431 in front of the air return opening 4321 is increased by adding the coil 4311, so that the temperature of the compressed air in the lower air pipe 431 is reduced more.

As shown in fig. 6, the wire holder 3 includes a fuse 31, and the fuse 31 serves as a first on-off switch for electrically connecting the switch cabinet to the outside. Because this cubical switchboard is portable, by frequent change service position and operating mode, so, probably overload because electric load information acquisition is incomplete and use, if do not protect, probably the device damages appear. The fuse 31 is a first on-off switch electrically connected with the outside of the switch cabinet, and can timely perform overload protection.

As shown in fig. 6 and 7, the fuse 31 includes a housing 311, terminals 312 and a fusible core 313, wherein four terminals 312 are disposed at two ends of the housing 311, two terminals are disposed on two planes, the housing 311 is filled with the fusible core 313 occupying one third to one half of the inner volume of the housing 311, and the portion of the housing 311 except for the fusible core 313 is evacuated or filled with inert gas.

The fuse 31 is usually a cylindrical section made of low-melting-point metal, but needs to be replaced after being fused, and if the fuse 31 is not backed up on site, even if circuit failure is eliminated, the fuse cannot be powered on in time.

The invention adopts the technical proposal that a fusible core 313 is filled in a shell 311, and four binding posts 312 are arranged outside the shell 311, so that the fuse 31 can be recycled, as shown in fig. 7, firstly, the terminals 312 on both sides of the upper layer are used for wiring, the originally solid fusible core 313 in the shell 311 is used as a conductor, the circuit is connected, when the circuit is overloaded and the current is too large, the fusible core 313 as the conductor is melted to be liquid, flows downwards and is accumulated at the lower part in the shell 311, the binding posts 312 at the two ends of the upper layer are electrically disconnected, the fusing operation is completed, after a period of time, the fusible core 313 in the lower part of the case 311 is solidified again to be solid, and when the circuit failure is removed, the fuse 31 is simply taken out and turned upside down, the fuse core 313 can be used as a new fuse 31 again, and the fuse core is blown again when the overcurrent occurs in the next period, then becomes liquid state to flow downwards, and is recycled. The remaining space in the case 311 is evacuated or filled with an inert gas to protect the fusible core 313 as the elemental state of the metal.

The fusible core 33 is metallic sodium. The melting point of sodium is 98 ℃, and the temperature is proper.

The main using process of the invention is as follows: the switch cabinet is transferred to a required position, the electric cable is connected through the wire holder 3, the heat emitted by the controller 2 in the cabinet body 1, cooling and heat dissipation are carried out through air, one ventilation unit 4 is taken as an air inlet part, the other ventilation unit is taken as an air outlet part, one axial flow fan 42 supplies air inwards and the other axial flow fan exhausts air outwards, an air inlet filter element 41 at the air inlet part filters dust and water vapor, the air entering the cabinet body 1 is clean and low-humidity air, the air pipe 431 is compressed and then cooled by the air outlet in the cabinet body 1, the air in the air pipe 431 is released at the pressure distribution valve 6, the pressure is suddenly reduced, the air entering the large environmental space in the cabinet body 1 is the air with the temperature lower than the atmospheric temperature outside the switch cabinet, the cooling effect is better, the air absorbs heat and rises, the air return port 4321 is sucked and exhausted to the outside, and when the air flows through the air inlet filter element 41 on the air outlet end, the accumulated dust and water vapor are washed away.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a movable cubical switchboard, includes the cabinet body (1), controller (2) and connection terminal (3), sets up controller (2) in the cabinet body (1), and the cabinet body (1) surface sets up connection terminal (3), controller (2) are connected its characterized in that with connection terminal (3) electricity: wheels are arranged at the bottom of the cabinet body (1);

the switch cabinet further comprises two ventilation units (4), two ventilation channels (11) are arranged on the side face of the cabinet body (1), each ventilation unit (4) comprises an air inlet filter element (41) and an axial flow fan (42), the air inlet filter elements (41) and the axial flow fans (42) are arranged in the ventilation channels (11), the air inlet filter elements (41) are arranged on one sides, close to the outside atmosphere, of the ventilation channels (11), the axial flow fans (42) are arranged on one sides, close to the controller (2), of the ventilation channels (11), the two axial flow fans (42) rotate forward and backward alternately, and when one axial flow fan (42) blows air into the cabinet body (1), the other axial flow blows air into the outside atmosphere;

the ventilating unit (4) further comprises an airflow pipe (43), the airflow pipe (43) is located inside the cabinet body (1), the airflow pipe (43) comprises a lower air pipe (431) and a return air pipe (432), one end of the lower air pipe (431) and one end of the return air pipe (432) are connected to the inner end of the air duct (11) in a gathering mode, the other end of the lower air pipe (431) extends to the bottom of the cabinet body (1) downwards, a check valve (5) which flows from the air duct (11) to the inside of the cabinet body (1) is arranged on the lower air pipe (431), the other end of the return air pipe (432) is provided with a return air inlet (4321) and is located at the top of the cabinet body (1), a check valve (5) which flows from the inside of the cabinet body (1) to the air duct (11) is arranged on the return air pipe (432), a plurality of air outlets are arranged at the tail end of the lower air pipe (431), a pressure distribution valve (6) is arranged on the air outlets, and the first section of the lower air pipe ( And then extends downwards.

2. A movable switchgear cabinet according to claim 1, characterized in that: the controller (2) is in a hollow triangular prism shape, the air outlet end of the lower air pipe (431) surrounds the bottom of the controller (2), and an air outlet is formed in the center of the controller (2).

3. A movable switchgear cabinet according to claim 1, characterized in that: the return air inlet (4321) is a trumpet-shaped or conical suction inlet, and the lower air pipe (431) comprises a section of coil pipe (4311) which is positioned in front of the return air inlet (4321) on the other ventilation unit (4).

4. A movable switchgear cabinet according to claim 1, characterized in that: the wire holder (3) comprises a fuse (31), and the fuse (31) is used as a first on-off switch electrically connected with the outside of the switch cabinet.

5. A movable switchgear, according to claim 4, characterized in that: the fuse (31) comprises a shell (311), binding posts (312) and a fusible core (313), wherein four binding posts (312) are arranged at two ends of the shell (311), every two binding posts are arranged on two planes in a group, the fusible core (313) occupying the volume of one third to one half of the shell (311) is filled in the shell, and the part of the shell (311) except the fusible core (313) is vacuumized or filled with inert gas.

6. A movable switchgear, according to claim 5, characterized in that: the fusible core (33) is metallic sodium.