CN115798959B

CN115798959B - Front power-off device for electric power overhaul

Info

Publication number: CN115798959B
Application number: CN202310061062.2A
Authority: CN
Inventors: 李季; 高洪福
Original assignee: Xuzhou Saifu Electronic Co ltd
Current assignee: Xuzhou Saifu Electronic Co ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-05-02
Anticipated expiration: 2043-01-18
Also published as: CN115798959A

Abstract

The invention discloses a front power-off device for electric power overhaul, which comprises a distribution box body, wherein a box door is arranged on the front surface of the distribution box body, circuit switches are fixedly arranged in the middle of an inner cavity of the distribution box body at equal intervals, and toggle switches are movably arranged in the circuit switches. According to the invention, the single switch and the partial switches and the opening modes of all the switches are set, so that the single switch or the partial switches can be opened freely when needed, and the limit of the device can be released in one step, so that all the circuit switches can be opened by one key, the device can meet the circuit opening requirements in different states, the one-key opening and closing of the whole circuit in circuit maintenance can be realized, the problem that the traditional device needs to be opened sequentially when the whole circuit is opened is avoided, the maintenance efficiency is improved, and the device is suitable for a distribution box with multiple groups of built-in switches.

Description

Front power-off device for electric power overhaul

Technical Field

The invention belongs to the technical field of electric power overhaul, and particularly relates to a front power-off device for electric power overhaul.

Background

The power equipment state maintenance is the scientific maintenance of guaranteeing power equipment, ensures the security of power equipment operation process and economic reliability thereof, realizes the continuous improvement of power enterprise economic benefits, and in the in-process of electric power maintenance, mainly is to the distribution equipment maintenance of carrying out electric power maintenance, wherein the electric power maintenance to the block terminal belongs to the essential maintenance work of electric power maintenance in-process, and multiunit circuit control switch can generally be installed to the inside of conventional block terminal, need carry out electrified maintenance operation when getting rid of special environment in whole maintenance process, generally all can carry out outage maintenance at maintenance in-process.

In the electric power maintenance process of the distribution box, because a plurality of groups of circuit switches are installed in the distribution box, in the maintenance process, power-off maintenance operation is generally carried out on the circuit switches, in the maintenance process, if maintenance test is carried out on a single group of circuit switches, only the single group of circuit switches are required to be opened at the moment, and when the whole circuit is required to be maintained, power-off is required to be carried out on all the circuit switches, so that before the maintenance operation, power-off operation is possibly carried out on a single circuit switch or a plurality of circuit switches or power-off operation is carried out on all the circuit switches, but when the whole circuit switch is powered off, all the circuit switches are required to be sequentially closed when the whole circuit switch is closed, so that the whole circuit can be opened or closed only by stirring the plurality of switches before maintenance, one-key power-off or closing cannot be carried out when the whole circuit is maintained, and the maintenance efficiency is low.

The distribution box is a box body made of metal, the front end of the distribution box is provided with a box door capable of moving, the box door must be opened in the process of overhauling the circuit to overhauling the circuit in the distribution box, however, when the distribution box is completely opened, the circuit in the whole distribution box is still in a connection state, and the power supply of the distribution box can be cut off under the condition that all circuit switches must be disconnected, if a single circuit switch is not cut off, the risk of electrified operation exists, and therefore, how to cut off the whole circuit rapidly when the box door is completely opened is very important.

Disclosure of Invention

The invention aims to provide a front power-off device for power overhaul, so as to solve the problems in the prior art.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a leading power outage device of electric power maintenance, includes the block terminal body, the front of block terminal body is equipped with the chamber door, the equidistant fixed mounting in middle part of block terminal body inner chamber has circuit switch, the inside equal movable mounting of circuit switch has toggle switch, the through-hole has all been seted up at toggle switch's middle part and the inside equal movable mounting at the through-hole has the universal driving axle, the left and right sides of universal driving axle runs through the both ends that are located left and right sides circuit switch, the left middle part fixed mounting of block terminal body inner chamber has fixed rail, fixed rail's inside movable joint has linkage power outage device, the other end of linkage power outage device is connected on the position that the chamber door medial surface is close to the left, fixed rail's rear end is equipped with protection device, the left end fixed mounting of universal driving axle has the fixed sleeve, the left side of fixed sleeve is equipped with the fly leaf, the fly leaf is connected with linkage power outage device's one end, the draw-in groove has all been seted up at both ends from top to bottom.

Before the electric power overhauling operation is carried out, a plurality of circuit switches inside the distribution box body are connected with an external circuit, meanwhile, the nitrogen quantity serving as protective gas inside the protection device is required to be ensured to be sufficient, and meanwhile, an anti-theft lock is required to be arranged on the front face of the box door and used for preventing electric shock accidents caused by misoperation of non-relevant personnel.

As a further technical scheme of the invention, a hinge is fixedly arranged on the left side of the box door, the box door is movably connected with the distribution box body through the hinge, an access door positioned right in front of the circuit switch is movably arranged in the middle of the front of the hinge, and a handle is fixedly arranged on the front of the box door close to the right side.

When the power-off operation is required to be carried out on the single circuit switch inside the distribution box body, the power-off operation is carried out on the single circuit switch or the plurality of circuit switches inside the distribution box body by opening the access door without opening the box door, and meanwhile, when the power-off operation is required to be carried out on all the circuit switches inside the distribution box body, the box door can be opened to operate, so that the power-off according to the required power-off type is realized.

As a further technical scheme of the invention, a movable column is movably sleeved in the fixed sleeve, one end of the movable column, which is close to the inner cavity of the fixed sleeve, is fixedly provided with a limiting spring positioned in the fixed sleeve, the other end of the limiting spring is connected with one end of the inner cavity of the fixed sleeve, and one end of the movable column, which is far away from the fixed sleeve, is fixedly connected with the movable plate.

As a further technical scheme of the invention, the upper side and the lower side of the movable plate, which are close to one end of the circuit switch, are fixedly provided with limiting rods, the upper end and the lower end of the circuit switch, which are positioned at the left side, are provided with limiting holes, and when the movable plate is positioned at the rightmost side, the limiting rods are movably clamped with the limiting holes.

When the internal circuit of the distribution box is overhauled, namely when a single circuit switch or a plurality of circuit switches are required to be disconnected, the access door can be directly opened, at the moment, the corresponding circuit switch can be disconnected by searching the corresponding circuit switch and downwards shifting the shifting switch, when the shifting switch downwards shifts, because the box door is in a closed state, the movable plate is positioned at the rightmost side, the limiting rod is inserted into the limiting hole to limit, the blocking of the limiting rod and the limiting hole can prevent the rotation of the linkage shaft, at the moment, the single shifting switch can rotate relative to the linkage shaft to complete the switching of the single circuit switch, and when all the circuit switches are required to be disconnected, the movable plate is moved leftwards, the limiting spring can be stretched at the moment, the movable column is driven to leave the inside of the fixed sleeve, at the moment, the movable plate is leftwards shifted and drives the limiting rod to leave the limiting hole, at the moment, when any shifting switch is downwards shifted, at the moment, due to the fact that the linkage shaft lacks limiting measures to match with the friction force of the inner side of the shifting switch, the movable shaft can be driven to rotate and drive all the shifting switches of the outer side of the movable shaft to synchronously downwards shift, the shifting switch is completed, and the movement of all the shifting switches is synchronously is completed, and the synchronous opening of all the shifting switches is synchronously is opened, and the shifting switches are completed, and the synchronous opening of all the shifting switches are completed.

Through setting up the disconnection mode of two kinds of switches, carry out the disconnection mode of single switch and local switch and all switches promptly, can freely carry out the disconnection of single switch or local switch when needs, but simultaneously one step release device's spacing, and then realize that a key is with all circuit switches disconnection totally for the device can satisfy the circuit disconnection demand under the different states, can realize the one-key disconnection and the closure of whole circuit when the circuit overhauls, avoid traditional device need carry out the problem of disconnection in proper order when carrying out whole circuit disconnection, improve maintenance efficiency, be fit for the block terminal of built-in multiunit switch and use.

As a further technical scheme of the invention, the linkage power-off device comprises a first fixed seat, the first fixed seat is connected with the left end of the movable plate, the movable plate rotates relative to the first fixed seat, one end of the first fixed seat, which is far away from the movable plate, is movably connected with a first connecting rod through a rotating shaft, and one end of the first connecting rod, which is far away from the first fixed seat, is movably connected with a second fixed seat through a rotating shaft.

As a further technical scheme of the invention, the side surface of the second fixing seat is fixedly provided with the guide block, the guide block is movably clamped with the fixed guide rail, the upper end and the lower end of the guide block are fixedly provided with the extension shafts, one end of each extension shaft penetrates through one end of the clamping groove and is fixedly provided with the mounting plates, and the number of the mounting plates is two and the two mounting plates are respectively positioned at the upper end and the lower end of the fixed guide rail.

As a further technical scheme of the invention, one end of the mounting plate far away from the fixed guide rail is movably provided with a second connecting rod through a rotating shaft, one ends of the two second connecting rods far away from the mounting plate are movably connected with a linkage seat through the rotating shaft, the linkage power-off device also comprises two third fixing seats, the two third fixing seats are connected with the position, close to the left side, of the inner side surface of the box door, and the linkage seat is movably connected with the third fixing seats through the rotating shaft.

When all the switches in the distribution box body are required to be disconnected, the box door can be opened, when the box door is pulled outwards, the third fixing seat can displace along with the box door to the outer side face, and synchronously drive the linkage seat to swing, at the moment, the second connecting rod swings along with the swinging, and the included angle between the linkage seat and the second connecting rod changes, at the moment, the mounting plate is outwards pulled along with the mounting plate, and drives the guide block to displace outwards, at the moment, the guide block displaces relative to the fixed guide rail and displaces towards the box door, the first connecting rod also swings due to the fact that the whole length of the first connecting rod is unchanged, at the moment, the first fixing seat has a tendency of displacing to the left side, along with the continuous swinging of the first connecting rod, the first fixing seat can be driven to displace to the left side, at the moment, the movable plate can be driven to displace to the left side automatically, the rotation limitation of the linkage shaft can be relieved, at the moment, any circuit switch can be disconnected, at the contrary, when the box door is completely closed, the first fixing seat displaces to the right side, and drives the movable plate to the right side until the rightmost, at the moment, the limit rod is inserted into the limit hole, the rotation of the movable shaft is limited, and only can complete the circuit switch operation by keying operation.

Through linking two disconnection modes with the switch of chamber door, namely when the chamber door is opened completely, the rotation restriction of universal driving axle is released this moment, but a plurality of circuit switch operation is carried out to the key, and when the chamber door is closed completely, the rotation of universal driving axle is restricted, can only operate in proper order to single circuit switch or a plurality of circuit switch, make it possess the ability that the quick switch single circuit switch had also possessed the ability that the whole circuit switch was opened and closed to the key, make it can cut off all circuits fast when the chamber door is opened completely, avoid single circuit not cut off the electrified risk that exists, the threshold value is higher, and can open different gates as required and carry out the outage of different switches, reduce the possibility of illegal operation, factor of safety is higher.

As a further technical scheme of the invention, the protection device comprises a temporary storage pipe, the temporary storage pipe is connected with the rear end of the fixed guide rail, a piston plate is movably sleeved in the temporary storage pipe, and a piston rod positioned in the temporary storage pipe is fixedly installed at one end of the piston plate.

As a further technical scheme of the invention, one end of the piston rod, which is far away from the piston plate, sequentially penetrates through the front end of the temporary storage pipe and the rear end of the fixed guide rail and is fixedly connected with the rear end of the guide block, the protection device further comprises a gas storage box positioned below the temporary storage pipe, the gas storage box is connected with the side surface of the inner cavity of the distribution box, and nitrogen is added into the gas storage box.

As a further technical scheme of the invention, an air inlet pipe is fixedly communicated below the temporary storage pipe close to the rear end, an exhaust pipe is fixedly communicated above the temporary storage pipe close to the rear end, the air inlet pipe is communicated with the air storage box, one-way pressure flap valves are arranged in the air inlet pipe and the exhaust pipe, and the directions of the valves are respectively inward conduction and outward stop and outward conduction and inward stop.

When the chamber door is opened, because the guide block can move forward along with the opening of the chamber door, can synchronously drive the piston rod to move forward at the moment, the piston plate at the rear end of the piston rod moves forward along with the piston rod, negative pressure is generated in the temporary storage pipe, the pressure flap valve in the air inlet pipe can be opened to suck partial nitrogen in the air storage chamber into the temporary storage pipe through the air inlet pipe, and when the chamber door is closed, the piston rod and the piston plate move to the rear end at the moment, so that pressure can be applied to the nitrogen in the temporary storage pipe, the pressure flap valve in the exhaust pipe is opened, and the nitrogen is discharged into the distribution box through the exhaust pipe, so that a circuit switch in the distribution box is protected.

Through utilizing the process that the chamber door was opened and was closed, the process that utilizes the chamber door to open realizes filling of nitrogen gas, and the process that utilizes the chamber door to close realizes the blowout of nitrogen gas, whole process automation is accomplished and is need not the manual work and intervene, make the device have partial nitrogen gas to fill to the inside of block terminal body when the chamber door is closed completely, avoid a plurality of circuit switch to start the back and contact with the air because of the short-time electric current is too big and cause the electric arc phenomenon, reduce the contact between electric current and the air through inert gas's the lets in, reduce the possibility that the electric arc takes place, and then improve circuit switch's life.

The beneficial effects of the invention are as follows:

1. according to the invention, through setting the opening modes of the two switches, namely the opening mode of a single switch and the opening modes of a local switch and all switches, the opening of the single switch or the local switch can be freely carried out when needed, and the limit of the device can be released in one step, so that all circuit switches can be completely opened by one key, the device can meet the circuit opening requirements in different states, the one-key opening and closing of the whole circuit in circuit maintenance can be realized, the problem that the traditional device needs to be sequentially opened when the whole circuit is opened is avoided, the maintenance efficiency is improved, and the device is suitable for the distribution box with multiple groups of built-in switches.

2. The invention can operate a plurality of circuit switches by one key through linking the two disconnection modes with the switch of the box door, namely when the box door is completely opened, the rotation restriction of the linkage shaft is released at the moment, and when the box door is completely closed, the rotation of the linkage shaft is restricted, and the linkage shaft can only sequentially operate the single circuit switch or the plurality of circuit switches, so that the linkage shaft has the capability of rapidly switching the single circuit switch and the capability of rapidly switching all the circuit switches by one key, can rapidly cut off all the circuits when the box door is completely opened, avoids the electrified risk that the single circuit is not cut off, has higher safety threshold value, can open different doors to cut off the power of different switches according to the requirement, reduces the possibility of illegal operation, and has higher safety coefficient.

3. According to the invention, the nitrogen is filled in by utilizing the opening and closing processes of the box door, the nitrogen is sprayed out by utilizing the opening processes of the box door, and the whole process is automatically completed without manual intervention, so that partial nitrogen is filled in the distribution box body when the box door is completely closed, the arc phenomenon caused by overlarge current and contact with air in a short time after a plurality of circuit switches are started is avoided, the contact between the current and the air is reduced by introducing inert gas, the possibility of arc occurrence is reduced, and the service life of the circuit switches is further prolonged.

Drawings

FIG. 1 is a schematic view of the present invention with a door open;

FIG. 2 is a schematic side view of the door of the present invention in an open position;

FIG. 3 is a schematic view of the access door of the present invention in an open condition;

FIG. 4 is a schematic view of the hidden door of the present invention;

FIG. 5 is a schematic diagram of the switch set and the linkage power-off device and the protection device according to the present invention;

FIG. 6 is a schematic diagram showing the cooperation of the switch assembly and the linkage shaft structure of the present invention;

FIG. 7 is a schematic diagram of the cooperation of the fixed rail and the linkage power-off device and the protection device of the present invention;

FIG. 8 is an exploded view of the stationary rail and linkage de-energized device of the present invention;

fig. 9 is a schematic cross-sectional view of the interior of the protective device of the present invention.

In the figure: 1. a distribution box body; 2. a door; 3. a handle; 4. a hinge; 5. an access door; 6. a circuit switch; 7. a toggle switch; 8. a linkage shaft; 9. a fixed sleeve; 10. a movable column; 11. a limit spring; 12. a movable plate; 13. a limit rod; 14. a limiting hole; 15. a fixed guide rail; 16. a clamping groove; 17. a linkage power-off device; 171. a first fixing seat; 172. a first link; 173. the second fixing seat; 174. a guide block; 175. an extension shaft; 176. a mounting plate; 177. a second link; 178. a linkage seat; 179. a third fixing seat; 18. a protection device; 181. a gas storage tank; 182. a temporary storage tube; 183. a piston rod; 184. a piston plate; 185. an air inlet pipe; 186. and an exhaust pipe.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 9, in the embodiment of the invention, the front power outage device for electric power overhaul comprises a power distribution box body 1, a box door 2 is arranged on the front surface of the power distribution box body 1, a circuit switch 6 is fixedly installed in the middle of an inner cavity of the power distribution box body 1 at equal intervals, a toggle switch 7 is movably installed in the circuit switch 6, through holes are formed in the middle of the toggle switch 7, a linkage shaft 8 is movably installed in the through holes, the left side and the right side of the linkage shaft 8 penetrate through two ends of the circuit switch 6 located on the left side and the right side, a fixed guide rail 15 is fixedly installed in the middle of the left side of the inner cavity of the power distribution box body 1, a linkage outage device 17 is movably clamped in the inside of the fixed guide rail 15, the other end of the linkage outage device 17 is connected with a position close to the left side of the inner side of the box door 2, a protection device 18 is arranged at the rear end of the fixed guide rail 15, a fixed sleeve 9 is fixedly installed at the left end of the linkage shaft 8, a movable plate 12 is arranged on the left side of the fixed sleeve 9, one ends of the movable plate 12 is connected with one ends of the linkage device 17, and clamping grooves 16 are formed in the upper end and lower ends of the fixed guide rail 15.

Before the electric power overhauling operation, a plurality of circuit switches 6 inside the distribution box body 1 can be connected with an external circuit, meanwhile, the sufficient nitrogen amount serving as protective gas inside the protection device 18 needs to be ensured, and meanwhile, an anti-theft lock is arranged on the front surface of the box door 2 and used for preventing electric shock accidents caused by misoperation of non-related personnel.

As shown in fig. 2, 3 and 4, a hinge 4 is fixedly installed on the left side of the box door 2, the box door 2 is movably connected with the distribution box body 1 through the hinge 4, an access door 5 positioned right in front of the circuit switch 6 is movably installed in the middle of the front side of the hinge 4, and a handle 3 is fixedly installed on the front side of the box door 2 close to the right side.

When the internal single circuit switch 6 is required to be powered off, the door 2 does not need to be opened, the single circuit switch 6 or a plurality of circuit switches 6 in the distribution box body 1 can be powered off by opening the access door 5, and meanwhile when all the circuit switches 6 in the distribution box body 1 are required to be powered off, the door 2 can be opened to operate, so that the power off according to the required power off type is realized.

As shown in fig. 4, 5 and 6, a movable column 10 is movably sleeved in the fixed sleeve 9, a limit spring 11 positioned in the fixed sleeve 9 is fixedly mounted at one end, close to the inner cavity of the fixed sleeve 9, of the movable column 10, the other end of the limit spring 11 is connected with one end of the inner cavity of the fixed sleeve 9, one end, far away from the fixed sleeve 9, of the movable column 10 is fixedly connected with a movable plate 12, a limit rod 13 is fixedly mounted at the upper side and the lower side, close to one end of the circuit switch 6, of the movable plate 12, limit holes 14 are formed at the upper end and the lower end, close to the left side, of the circuit switch 6, of the movable plate 12, and when the movable plate 12 is positioned at the rightmost side, the limit rod 13 is movably clamped with the limit holes 14.

First embodiment:

when the circuit inside the distribution box body 1 is overhauled, namely when a single circuit switch 6 or a plurality of circuit switches 6 are required to be disconnected, the access door 5 can be directly opened, at the moment, the corresponding circuit switch 6 can be searched and the corresponding circuit switch 6 can be disconnected by downwards stirring the switch 7, when the switch 7 is downwards stirring, the box door 2 is in a closed state, the movable plate 12 is positioned at the rightmost side, the limiting rod 13 is inserted into the limiting hole 14 to limit the circuit, the linkage shaft 8 can be prevented from rotating through the blocking of the limiting rod 13 and the limiting hole 14, at the moment, the single stirring switch 7 can rotate relative to the linkage shaft 8 to complete the switching of the single circuit switch 6, and when all the circuit switches 6 are required to be disconnected, the movable plate 12 is moved leftwards, at the moment, the limiting spring 11 is stretched, the movable column 10 is driven to leave the inside of the fixed sleeve 9, the movable plate 12 is moved leftwards and the limiting rod 13 is driven to leave the limiting hole 14, at the moment, when any switch 7 is downwards stirring, at the moment, the linkage shaft 8 lacks a limit measure fit with the friction force on the inner side of the switch 7, namely, all the movable switches 7 are driven to rotate, and all the movable switches 7 are synchronously disconnected, and the synchronous movement of the movable switches are accomplished.

Through setting up the disconnected mode of two kinds of switches, carry out the disconnected mode of single switch and local switch and all switches, can freely carry out the disconnection of single switch or local switch when needs, but simultaneously one step release device's spacing, and then realize that a key is with all circuit switch disconnection completely for the device can satisfy the circuit disconnection demand under the different states, can realize the one-key disconnection and the closure of whole circuit when the circuit overhauls, avoid traditional device need carry out the problem of disconnection in proper order when carrying out whole circuit disconnection, improve maintenance efficiency, be fit for the block terminal of built-in multiunit switch and use.

As shown in fig. 4 and 5 and fig. 7 and 8, the linkage power-off device 17 comprises a first fixed seat 171, the first fixed seat 171 is connected with the left end of the movable plate 12, the movable plate 12 rotates relative to the first fixed seat 171, one end of the first fixed seat 171 far away from the movable plate 12 is movably connected with a first connecting rod 172 through a rotating shaft, one end of the first connecting rod 172 far away from the first fixed seat 171 is movably connected with a second fixed seat 173 through a rotating shaft, a guide block 174 is fixedly arranged on the side surface of the second fixed seat 173, a movable clamping joint is arranged between the guide block 174 and the fixed guide rail 15, extension shafts 175 are fixedly arranged at the upper end and the lower end of the guide block 174, one end of extension axle 175 runs through the one end of draw-in groove 16 and fixed mounting has mounting panel 176, and the quantity of mounting panel 176 is two upper and lower both ends that are located fixed rail 15 respectively, and the one end that fixed rail 15 was kept away from to mounting panel 176 all has second connecting rod 177 through pivot movable mounting, and the one end that mounting panel 176 was kept away from to two second connecting rods 177 has linkage seat 178 through pivot swing joint, and linkage power-off 17 still includes third fixing base 179, and the quantity of third fixing base 179 is two, is connected on the position that two third fixing bases 179 are close to the left side with chamber door 2 medial surface, through pivot swing joint between linkage seat 178 and the third fixing base 179.

Second embodiment:

when all the switches in the distribution box body 1 need to be disconnected, the box door 2 can be opened, when the box door 2 is pulled outwards, the third fixing seat 179 can displace along with the outer side face of the box door 2 at the moment and synchronously drives the linkage seat 178 to swing, the second connecting rod 177 swings along with the third fixing seat, the included angle between the linkage seat 178 and the second connecting rod 177 changes, the mounting plate 176 receives outwards pulling force at the moment and drives the guide block 174 to displace outwards, the guide block 174 displaces relative to the fixed guide rail 15 at the moment and displaces towards the box door 2, the first connecting rod 172 also swings due to the fact that the whole length of the first connecting rod 172 is unchanged, the first fixing seat 171 has a trend of leftwards displacement at the moment, along with the continuous swinging of the first connecting rod 172, the first fixing seat 171 can be driven to displace towards the left side, at this time, the movable plate 12 can be driven to displace towards the left side automatically, the rotation limitation of the linkage shaft 8 is released, at this time, any one of the circuit switches 6 can be broken, otherwise, when the box door 2 is completely closed, the first fixing seat 171 displaces towards the right side, and drives the movable plate 12 to move towards the right side until the movable plate moves to the rightmost side, at this time, the limiting rod 13 is inserted into the limiting hole 14, the rotation of the linkage shaft 8 is limited, at this time, only a single circuit switch 6 can be operated, and the switching of all the circuit switches 6 can not be controlled by one key, so that the power-off operation according to needs is completed.

Through linking the two disconnection modes with the switch of the box door 2, namely when the box door 2 is completely opened, the rotation limitation of the linkage shaft 8 is released at the moment, the multiple circuit switches 6 can be operated by one key, and when the box door 2 is completely closed, the rotation of the linkage shaft 8 is limited, and the single circuit switch 6 or the multiple circuit switches 6 can be sequentially operated, so that the box door has the capability of rapidly switching the single circuit switch 6 and the capability of opening and closing all the circuit switches 6 by one key, the whole circuit can be rapidly cut off when the box door 2 is completely opened, the electrified risk that the single circuit is not cut off is avoided, the safety threshold is higher, the different doors can be opened as required to cut off the power of the different switches, the possibility of illegal operation is reduced, and the safety coefficient is higher.

As shown in fig. 4 and 7 and fig. 8 and 9, the protection device 18 includes a temporary storage pipe 182, the temporary storage pipe 182 is connected with the rear end of the fixed rail 15, a piston plate 184 is movably sleeved in the temporary storage pipe 182, one end of the piston plate 184 is fixedly provided with a piston rod 183 located in the temporary storage pipe 182, one end of the piston rod 183 far away from the piston plate 184 sequentially penetrates through the front end of the temporary storage pipe 182 and the rear end of the fixed rail 15 and is fixedly connected with the rear end of the guide block 174, the protection device 18 further includes a gas storage box 181 located below the temporary storage pipe 182, the gas storage box 181 is connected with the side surface of the inner cavity of the distribution box body 1, nitrogen is added in the interior of the gas storage box 181, an air inlet pipe 185 is fixedly communicated with the lower part of the temporary storage pipe 182 near the rear end, an exhaust pipe 186 is fixedly communicated with the upper part of the temporary storage pipe 182 near the rear end, one-way pressure valves are installed in the air inlet pipe 185 and the inner part of the exhaust pipe 186, and the directions of the valves are respectively turned on inwards and turned outwards and turned inwards and turned off.

Third embodiment:

when the box door 2 is opened, the guide block 174 can move forward along with the opening of the box door 2, so that the piston rod 183 can be synchronously driven to move forward, the piston plate 184 at the rear end of the piston rod 183 moves forward along with the piston rod and generates negative pressure in the temporary storage pipe 182, partial nitrogen in the gas storage box 181 can be sucked into the temporary storage pipe 182 through the gas inlet pipe 185 when the pressure flap valve in the gas inlet pipe 185 is opened, and when the box door 2 is closed, the piston rod 183 and the piston plate 184 move to the rear end, so that pressure can be applied to the nitrogen in the temporary storage pipe 182, the pressure flap valve in the gas outlet pipe 186 is opened, and the nitrogen is discharged into the power distribution box 1 through the gas outlet pipe 186, so that the circuit switch 6 in the power distribution box 1 is protected.

Through utilizing the process that chamber door 2 opened and closed, the process that utilizes chamber door 2 to open realizes filling of nitrogen gas, and the process that utilizes chamber door 2 to close realizes the blowout of nitrogen gas, whole process automation is accomplished and is need not the manual work and intervene, make the device have partial nitrogen gas to fill to the inside of block terminal 1 when chamber door 2 closes completely, avoid a plurality of circuit switch 6 start the back and contact because of the short time electric current is too big and with the air and cause the electric arc phenomenon, reduce the contact between electric current and the air through inert gas's the letting in, reduce the possibility that the electric arc takes place, and then improve circuit switch 6's life.

Working principle and using flow:

when the internal single circuit switch 6 is required to be powered off, the door 2 does not need to be opened, the single circuit switch 6 or a plurality of circuit switches 6 in the distribution box body 1 can be powered off by opening the access door 5, and meanwhile, when all the circuit switches 6 in the distribution box body 1 are required to be powered off, the door 2 can be opened to operate, so that the power off according to the required power off type can be realized;

when the circuit inside the distribution box body 1 is overhauled, namely when a single circuit switch 6 or a plurality of circuit switches 6 are required to be disconnected, the access door 5 can be directly opened, at the moment, the corresponding circuit switch 6 can be searched for and the corresponding circuit switch 6 can be disconnected by downwards stirring the switch 7, when the switch 7 is downwards stirred, the box door 2 is in a closed state, the movable plate 12 is positioned at the rightmost side, the limiting rod 13 is inserted into the limiting hole 14 to limit the circuit, the linkage shaft 8 can be prevented from rotating through the blocking of the limiting rod 13 and the limiting hole 14, at the moment, the single stirring switch 7 can rotate relative to the linkage shaft 8 to complete the switching of the single circuit switch 6, and when all the circuit switches 6 are required to be disconnected, the movable plate 12 is moved leftwards, at the moment, the limiting spring 11 is stretched, the movable column 10 is driven to leave the inside of the fixed sleeve 9, at the moment, the movable plate 12 is leftwards displaced and the limiting rod 13 is driven to leave the limiting hole 14, at the moment, when any switch 7 is downwards moved, at the moment, the linkage shaft 8 lacks a limit measure fit with the friction force on the inner side surface of the stirring switch 7, namely, all the movable switches 7 are driven to rotate, and all the movable switches 7 are synchronously disconnected, and the synchronous movement of the movable switches are accomplished;

when all the switches in the distribution box body 1 need to be disconnected, the box door 2 can be opened, when the box door 2 is pulled outwards, the third fixing seat 179 can displace along with the outer side face of the box door 2 at the moment and synchronously drives the linkage seat 178 to swing, the second connecting rod 177 swings along with the third fixing seat, the included angle between the linkage seat 178 and the second connecting rod 177 changes, the mounting plate 176 receives outwards pulling force at the moment and drives the guide block 174 to displace outwards, the guide block 174 displaces relative to the fixed guide rail 15 at the moment and displaces towards the box door 2, the first connecting rod 172 also swings due to the fact that the whole length of the first connecting rod 172 is unchanged, the first fixing seat 171 has a trend of leftwards displacement at the moment, along with the continuous swinging of the first connecting rod 172, the first fixing seat 171 can be driven to displace towards the left side, at the moment, the movable plate 12 can be driven to displace towards the left side automatically, the rotation limitation of the linkage shaft 8 is released, at the moment, any one of the circuit switches 6 can be broken, otherwise, when the box door 2 is completely closed, the first fixing seat 171 displaces towards the right side, and drives the movable plate 12 to move towards the right side until the movable plate moves to the rightmost side, at the moment, the limiting rod 13 is inserted into the limiting hole 14, the rotation of the linkage shaft 8 is limited, at the moment, only a single circuit switch 6 can be operated, and the switching of all the circuit switches 6 can not be controlled by one key, so that the power-off operation according to needs is completed;

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Front-mounted power-off device for electric power overhaul comprises a distribution box body (1), and is characterized in that: the front of the distribution box body (1) is provided with a box door (2), the middle part of the inner cavity of the distribution box body (1) is fixedly provided with a circuit switch (6) at equal intervals, the inside of the circuit switch (6) is movably provided with a toggle switch (7), the middle part of the toggle switch (7) is provided with a through hole, the inside of the through hole is movably provided with a linkage shaft (8), the left side and the right side of the linkage shaft (8) penetrate through two ends of the circuit switch (6) positioned at the left side and the right side, the middle part of the left side of the inner cavity of the distribution box body (1) is fixedly provided with a fixed guide rail (15), the inside of the fixed guide rail (15) is movably clamped with a linkage power-off device (17), the other end of the linkage power-off device (17) is connected with the position, close to the left side, of the inner side of the box door (2), the rear end of the fixed guide rail (15) is provided with a protection device (18), the left end of the linkage shaft (8) is fixedly provided with a fixed sleeve (9), the left side of the fixed sleeve (9) is provided with a movable plate (12), and the movable plate (12) is fixedly provided with two ends of the fixed guide rails (16), and two ends of the upper ends of the linkage power-off device (17) are connected with the upper and the lower ends of the fixed guide rail (16).

The movable column (10) is movably sleeved in the fixed sleeve (9), one end of the movable column (10) close to the inner cavity of the fixed sleeve (9) is fixedly provided with a limiting spring (11) positioned in the fixed sleeve (9), the other end of the limiting spring (11) is connected with one end of the inner cavity of the fixed sleeve (9), and one end of the movable column (10) away from the fixed sleeve (9) is fixedly connected with the movable plate (12);

limiting rods (13) are fixedly arranged on the upper side and the lower side of the movable plate (12) close to one end of the circuit switch (6), limiting holes (14) are formed in the upper end and the lower end of the circuit switch (6) on the left side, and when the movable plate (12) is located on the rightmost side, the limiting rods (13) are movably clamped with the limiting holes (14);

the linkage power-off device (17) comprises a first fixed seat (171), the first fixed seat (171) is connected with the left end of the movable plate (12), the movable plate (12) rotates relative to the first fixed seat (171), one end, far away from the movable plate (12), of the first fixed seat (171) is movably connected with a first connecting rod (172) through a rotating shaft, and one end, far away from the first fixed seat (171), of the first connecting rod (172) is movably connected with a second fixed seat (173) through the rotating shaft;

the side of the second fixing seat (173) is fixedly provided with a guide block (174), the guide block (174) is movably clamped with the fixed guide rail (15), the upper end and the lower end of the guide block (174) are fixedly provided with extension shafts (175), one end of each extension shaft (175) penetrates through one end of the clamping groove (16) and is fixedly provided with mounting plates (176), and the number of the mounting plates (176) is two and is respectively positioned at the upper end and the lower end of the fixed guide rail (15);

the utility model discloses a door, including fixed guide (15) and mounting panel, mounting panel (176) are kept away from one end of fixed guide (15) and are all kept away from through pivot movable mounting second connecting rod (177), two the one end that mounting panel (176) were kept away from to second connecting rod (177) is through pivot swing joint there is linkage seat (178), linkage power-off device (17) still include third fixing base (179), the quantity of third fixing base (179) is two, two on the position that third fixing base (179) are close to the left side with chamber door (2) medial surface is connected, through pivot swing joint between linkage seat (178) and third fixing base (179).

2. The power overhaul front power cut-off device according to claim 1, wherein: the novel electric power distribution box is characterized in that a hinge (4) is fixedly arranged on the left side of the box door (2), the box door (2) is movably connected with the distribution box body (1) through the hinge (4), an access door (5) positioned right in front of a circuit switch (6) is movably arranged in the middle of the front of the hinge (4), and a handle (3) is fixedly arranged at the position, close to the right side, of the front of the box door (2).

3. The power overhaul front power cut-off device according to claim 1, wherein: the protection device (18) comprises a temporary storage pipe (182), the temporary storage pipe (182) is connected with the rear end of the fixed guide rail (15), a piston plate (184) is movably sleeved in the temporary storage pipe (182), and a piston rod (183) positioned in the temporary storage pipe (182) is fixedly installed at one end of the piston plate (184).

4. A power overhaul front power cut-off device according to claim 3, characterized in that: one end that piston rod (183) kept away from piston board (184) runs through the rear end of temporary storage pipe (182) and fixed guide (15) in proper order and with the rear end fixed connection of guide block (174), protection device (18) still include gas storage box (181) that are located temporary storage pipe (182) below, gas storage box (181) are connected with the side of block terminal body (1) inner chamber, the inside of gas storage box (181) is added with nitrogen gas.

5. The power overhaul front power cut-off device of claim 4, wherein: the utility model discloses a temporary storage device for a gas storage box, including gas storage box (181), gas inlet pipe (185) is fixed to the below that temporary storage pipe (182) is close to the rear end, the top that temporary storage pipe (182) is close to the rear end is fixed to be linked together and is had blast pipe (186), be linked together between gas inlet pipe (185) and gas storage box (181), unidirectional pressure flap valve is all installed to the inside of gas inlet pipe (185) and blast pipe (186), the valve direction of the inside unidirectional pressure flap valve of gas inlet pipe (185) is inside switch-on and outside cut-off, the valve direction of the inside unidirectional pressure flap valve of blast pipe (186) is outside switch-on and inside cut-off.