CN206076147U - High voltage load switch fuse combined electric apparatus - Google Patents

Abstract

This utility model discloses a kind of high voltage load switch fuse combined electric apparatus, including frame and combined electrical apparatus component, the both sides of frame are fixed with installing plate respectively, operating mechanism is arranged on the installing plate of frame side, and the installing plate of frame opposite side is provided with the interlocking mechanism of isolation axle, load axis and grounding shaft；The interlocking mechanism includes the first interlocking arm, the second interlocking arm, the 3rd interlocking arm, the 4th interlocking arm and escapement, 3rd interlocking arm and escapement are hubbed in the frame, 3rd interlocking arm is arranged between the second interlocking arm and the 4th interlocking arm, second interlocking arm is connected by blocking lever with the 3rd interlocking arm, escapement is arranged between the 3rd interlocking arm and the 4th interlocking arm, is respectively equipped with locating slot on the first interlocking arm, the second interlocking arm, the 3rd interlocking arm and the 4th interlocking arm neighboring.This utility model realizes the mechanical interlocking for isolating axle, load axis and grounding shaft by arranging interlocking mechanism, it is ensured that the safe operation of electric equipment, safe and reliable.

Description

High voltage load switch-fuse combined electric apparatus

Technical field

This utility model is related to the technical field of electric equipment, more particularly to a kind of high voltage load switch-fuse combination Electrical equipment.

Background technology

High voltage load switch generally have disconnecting switch, on-load switch main body and earthed switch, wherein, isolation axle drive every Leave and put row divide-shut brake into, load axis drive on-load switch main body division load, grounding shaft to drive earthed switch to carry out divide-shut brake, When on-load switch main body load is turned on, disconnecting switch is closed a floodgate, grounding switch tripping, when on-load switch main body load disconnects, isolation Switch separating brake, earthed switch close a floodgate.When in prior art, on-load switch main body load is turned on, the easy maloperation of disconnecting switch is carried out Separating brake, the easy maloperation of earthed switch are closed a floodgate, and when on-load switch main body load disconnects, the easy maloperation of disconnecting switch is carried out Close a floodgate, the easy maloperation of earthed switch carries out separating brake, and then can produce potential safety hazard, causes the generation of production accident.

Chinese patent literature CN203312690U disclose it is a kind of with isolation, load, fusing, grounding function combined electrical apparatus, In the technical scheme, combined electrical apparatus is that side is mounted on the side wall of frame or switch cubicle, will combined electrical apparatus from frame or switch The side assembling of cabinet is fixed on the side wall of side wall or switch cubicle of frame, and existing switch cubicle is wider, and existing combined electrical apparatus is whole Body is more elongated, is limited by combined electrical apparatus volume and height, and existing combined electrical apparatus generally all can only be using side dress fixed installation Mode.This side dress mode has the disadvantages that and not enough：

1st, as existing combined electrical apparatus is overall more elongated so that the gravity of combined electrical apparatus is more concentrated, and side dress side Formula can make combined electrical apparatus concentrate on the side of switch cubicle, so as to the distribution of force of switch cubicle can be caused uneven, affect integral device Stability.

2nd, as combined electrical apparatus is heavier, on the dress combined electrical apparatus of side, switch cubicle can be caused to be deformed, and then door of switch cabinet On handle hole and operating mechanism on handle hole can not corresponding matching exactly, so as to can not be to the handle hole on operating mechanism Operated, it is impossible to which combined electrical apparatus is controlled, prior art is to make on the handle hole and operating mechanism on door of switch cabinet Handle hole alignment, it will usually increase the handle hole on door of switch cabinet, this will further reduce the intensity of door of switch cabinet, So as to the strength and stability of switch cubicle can be reduced.

3rd, need combined electrical apparatus to be lifted or hold in the palm on artificial when side fills, combined electrical apparatus is aligned in into the side wall of frame or is opened After closing the installing hole on the side wall of cabinet, then combined electrical apparatus is fixedly mounted on the side wall of the side wall or switch cubicle of frame again On, as combined electrical apparatus is heavier, very big inconvenience can be brought to operation, when side fills in addition, working space is little, needs many people to coordinate Complete together, working performance is low, task difficulty is big, cost of labor is high.

4th, after completing the side dress of combined electrical apparatus, in addition it is also necessary to make and install the insulating barrier of bus-bar room and switch gear room again, fill With complex procedures, manufacture efficiency is low.

It is a kind of with isolation, load, fusing, the combination of grounding function disclosed in above-mentioned Chinese patent literature CN203312690U In electrical equipment, pole is the one side sealing complex process by vacuum interrupter sealing in pole by the way of sealing, causes group Electrical equipment manufacture complexity is closed, manufacture efficiency is low, and on the other hand, sealing technology difficulty is big, can produce the underproof problem of sealing, not only Conforming product rate is reduced, is caused to waste, is also brought along potential safety hazard, prior art vacuum interrupter also needs to sulfuration in addition, enters One step increase task difficulty complicates technique.Additionally, by the way of sealing, vacuum interrupter can be made to become elongated, can be increased The height of combined electrical apparatus, so as to increase the volume of switch cubicle, as the upper and lower contact of vacuum interrupter is thinner, is not easy to and fusing The connection of device and disconnecting switch, increases assembly difficulty.

Chinese patent literature CN203312690U disclose it is a kind of with isolation, load, fusing, grounding function combined electrical apparatus, In the technical scheme, fuse is provided in the lower section of pole, due to fuse position it is on the lower side so that combined electrical apparatus it is upper and lower across Degree is big, causes the entire length of combined electrical apparatus longer, loosely organized, so as to increase the volume of switch cubicle, in addition, fuse is again It is connected in frame by insulator, connected mode is complicated, assembly difficulty is big.

Chinese patent literature CN203312690U disclose it is a kind of with isolation, load, fusing, grounding function combined electrical apparatus, In the technical scheme, three fuse support bases 101 are connected in frame 1 by three insulators 102 respectively, three fuses The lower end of support base 101 is respectively provided with the cutter holder being engaged with grounding switch 81, and this employing insulator fixes fuse and ground connection The mode complex structure of cutter holder, can also increase height, the volume and weight of combined electrical apparatus, and assembly difficulty is big.

Utility model content

The purpose of this utility model be provide one kind can realize isolate axle, between load axis and grounding shaft interlocking, protect Card production safety, the high voltage load switch-fuse combined electric apparatus for avoiding maloperation.

To solve above-mentioned technical problem, this utility model provides technical scheme below：

High voltage load switch-fuse combined electric apparatus, including frame and the combination being made up of high voltage load switch-fuse Electric appliance component, combined electrical apparatus component are installed in frame, and the both sides of frame are fixed with installing plate, combined electrical apparatus component tool respectively Isolation axle, load axis and the grounding shaft for having operating mechanism and being controlled by operating mechanism, isolation axle, load axis and grounding shaft are hubbed on In frame and between the installing plate of frame both sides, the two ends for isolating axle, load axis and grounding shaft are each passed through and are hubbed at The installing plate of frame both sides, operating mechanism are arranged on the installing plate of frame side and connect with axle, load axis and grounding shaft is isolated Connect, the installing plate of frame opposite side is provided with the interlocking mechanism of isolation axle, load axis and grounding shaft；

The interlocking mechanism includes the first interlocking arm, the second interlocking arm, the 3rd interlocking arm, the 4th interlocking arm and escapement, the One interlocking arm, the second interlocking arm and the 4th interlocking arm are respectively fixedly connected with the end of isolation axle, load axis and grounding shaft, and first , up and down against arranging and can be rotated simultaneously, the 3rd interlocking arm and escapement are hubbed on the frame for interlocking arm and the second interlocking arm On, the 3rd interlocking arm is arranged between the second interlocking arm and the 4th interlocking arm, and the second interlocking arm and the 3rd interlocking arm are by interlocking Bar is connected, and escapement is arranged between the 3rd interlocking arm and the 4th interlocking arm, the first interlocking arm, the second interlocking arm, the 3rd The first locating slot, the second locating slot, the 3rd locating slot and the 4th positioning are respectively equipped with hammerlock and the 4th interlocking arm neighboring Groove；

During conducting load, grounding shaft can drive the 4th locating slot of the 4th interlocking arm to turn to position upward, and first First locating slot of hammerlock can turn to the position fastened with the neighboring of the second interlocking arm, and the second interlocking arm can be by connection Locking bar drives the 3rd interlocking arm to be rotated, and the neighboring of the 3rd interlocking arm can push escapement and make the lower rotation of escapement extremely The position fastened with the 4th locating slot of the 4th interlocking arm；

When disconnecting load, the second interlocking arm can drive the 3rd interlocking arm to be rotated by blocking lever, and make the 3rd interlocking 3rd locating slot of arm turns to position directed downwardly, and the second locating slot of the second interlocking arm can be turned to and the first interlocking arm periphery The position that edge fastens, the neighboring of the 4th interlocking arm can push up escapement and make to turn at the top of escapement and the 3rd The position that 3rd locating slot of interlocking arm fastens.

Further, the combined electrical apparatus component also includes disconnecting switch, on-load switch, earthed switch and fuse, institute Stating isolation axle, load axis and grounding shaft and controlling disconnecting switch, on-load switch and earthed switch respectively carries out point/conjunction, frame Top is provided with installation frame, and installation frame is fixedly connected between the installing plate of frame both sides, has installing hole on installation frame, On-load switch is arranged side by side and integrally formed epoxy pole with three, and three epoxy poles protrude to be formed to its surrounding respectively One flange, the flange on three epoxy poles is side-by-side be collectively forming the insulation that is engaged with installation frame upper installing hole every Plate, the both sides up and down of insulating barrier form bus-bar room and switch gear room respectively, are provided with vacuum interrupter, vacuum in each epoxy pole The upper end of arc-chutes is connected with disconnecting switch, and the lower end of vacuum interrupter is connected with the upper end of fuse, the lower end of fuse with Earthed switch connects.

Further, the epoxy pole has a lower house, the surrounding of the top down housing of lower house protrude to be formed with The integrally formed square-shaped flange of lower house, the top in lower casing body are provided with accommodating chamber, and the vacuum interrupter is arranged on accommodating chamber It is interior.

Further, the flange upwardly extends to form one with the integrally formed upper shell of lower house, the top of accommodating chamber Be provided with the dividing plate for separating upper shell and lower house, the upper end of vacuum interrupter is connected with into line bar, enter line bar through dividing plate and to Under extend in vacuum interrupter, enter line bar upper end and be connected with static contact, static contact is fixedly installed on dividing plate, the top of upper shell Portion is located above static contact and is fixed with junction block；

The isolation axle is arranged between the epoxy pole and frame and is located at the lower section of the flange, described to keep apart Close with the isolation knife corresponding with static contact, the first end of isolation knife is articulated on static contact, isolation axle is connected with isolation knife, And isolation knife can be driven to be rotated, so that the second end of isolation knife and upper junction block are carried out point/are closed.

Further, the upper shell is " ㄥ " shape, and " ㄥ " shape storage tank is provided with upper casing body, close on the flange position The side of frame is provided with through hole, and the through hole is connected with storage tank；

Isolation axle is connected with isolation knife by linkage, and linkage is arranged in upper casing body, with connecting rod on isolation axle What mechanism was corresponding be provided with first turns wall, and linkage includes first connecting rod, second connecting rod and third connecting rod, and first connecting rod is downward Through through hole and the first end of first connecting rod is articulated in corresponding first and is turned on wall, in the middle part of second connecting rod, be articulated in upper casing In vivo on the two side of storage tank, the first end of second connecting rod is articulated in the second end of first connecting rod, the first end of third connecting rod The second end of second connecting rod is articulated in, the second end of third connecting rod is articulated in isolation knife, and third connecting rod can drive isolation knife to enter Row is rotated, and the second end of isolation knife and the upper junction block can be made to carry out point/conjunction.

Further, the fuse is detachably arranged at the side away from frame of the epoxy pole, fuse Upper end is connected to the lower end of vacuum interrupter by the portion that is flexible coupling, and the upper end of fuse is higher than the lower end of vacuum interrupter.

Further, the load axis are arranged on the lower section of the isolation axle, and the lower end of the vacuum interrupter is connected with Lower pull bar, load axis are connected with lower pull bar by operating mechanism, and lower pull bar can be driven to move up and down, to realize vacuum interrupter Interior dynamic/static contact point/close；

Operating mechanism includes insulation pulling plate, excess of stroke bar assembly, and the first end of insulation pulling plate is articulated on lower pull bar, and insulation is drawn Plate through the epoxy pole near the frame side wall and pivot joint on the side wall, the second end of insulation pulling plate extends to ring Between oxygen pole and the frame, the lower end of excess of stroke bar assembly is articulated in the second end of insulation pulling plate, with actuating machine on load axis What structure was corresponding be provided with second turns wall, and the upper end of excess of stroke bar assembly is articulated in second and turns on wall.

Further, the side away from the frame that the bottom of the lower house has under shed, lower house is provided with side Opening, side opening are arranged on the lower section of the vacuum interrupter and extend to the bottom of lower house, removably set on lower house There is the lower cover that can cover under shed and side opening, lower cover extends downward the lower section of lower house, and the lower end of fuse is connected with admittedly Determine the lower molten card of fuse, lower molten fixing is scheduled on the bottom of lower cover, and fuse lower end is also associated with lower junction block.

Further, the earthed switch includes earthing and ground connection cutter holder, and earthing passes through linking arm and the ground connection Axle connects, and earthing folder is fixedly connected on the bottom of the lower cover, and ground connection cutter holder is located at lower cover near the side of the frame, connects The earth's axis can drive earthing to be rotated by linking arm, and can be grounded knife and be grounded dividing/closing for cutter holder.

Further, also including rotary shaft, pull bar, the first bearing pin, the second bearing pin and fulcrum bearing；

The lower cover is downwardly extending two side plates being oppositely arranged, corresponding respectively on two side plates to be provided with an arc Shape groove, the first bearing pin are arranged between two side plates, and the two ends of the first bearing pin are limited in the arcuate groove of two side plates, and first Bearing pin can be moved between the two ends of arcuate groove, and rotary shaft is arranged on the top of the grounding shaft and is hubbed on the frame On, the first end of pull bar is connected with rotary shaft, and the second end of pull bar extends between two side plates and is articulated on the first bearing pin；

Second bearing pin is arranged between two side plates and is located at the lower section of first bearing pin, the two ends pivot joint of the second bearing pin On two side plates, fulcrum bearing is arranged on the second side of lower cover, and fulcrum bearing upwardly extends to form integrally formed with fulcrum bearing two Individual cursor, two cursors incline certain angle to the direction away from fulcrum bearing, and two cursors are separately positioned on two sides The outside of plate, in fulcrum bearing, the top of two cursors is articulated in the two ends of the first bearing pin respectively, two cursors in fulcrum bearing Bottom be articulated in the two ends of the second bearing pin respectively；

Arcuate groove has first end and the second end, and rotary shaft can drive the first bearing pin to move against to arc by pull bar The first end of shape groove, and lower cover is strained and fixed, while fulcrum bearing can be rotated up to support fixing around the second bearing pin The position of fuse；Rotary shaft can also drive the first bearing pin to move to the second end of arcuate groove by pull bar, and under unclamping Lid, while fulcrum bearing can be swung down to away from the position for supporting fixed fuse around the second bearing pin.

This utility model realizes the mechanical interlocking for isolating axle, load axis and grounding shaft by arranging interlocking mechanism, it is to avoid Maloperation.On the one hand, when load is turned on, switch cubicle carries out following action successively：Shut cabinet door --- point earthed switch --- to close Upper disconnecting switch --- close on-load switch, by arranging interlocking mechanism, it is to avoid the disconnecting switch on-load point when load is turned on Lock and earthed switch are closed a floodgate；On the other hand, when load is disconnected, switch cubicle carries out following action successively：Separate load to open Close and --- divide disconnecting switch --- closing earthed switch --- to open cabinet door, by arranging interlocking mechanism, earthed switch can be closed Lock, while avoid keeping apart when load is disconnected closing lock and on-load switch is closed a floodgate.So as to realize safety interlocking, it is ensured that The safe operation of electric equipment, it is safe and reliable.

Description of the drawings

Fig. 1 is the overall structure figure of high voltage load switch-fuse combined electric apparatus；

Fig. 2 is the structure chart of another angles of Fig. 1；

Fig. 3 is the structure chart of frame in Fig. 1；

Fig. 4 is the structure chart of on-load switch in Fig. 1；

Fig. 5 is sectional view when disconnecting switch is closed a floodgate in Fig. 1；

Sectional view when Fig. 6 is disconnecting switch separating brake in Fig. 1；

Fig. 7 is the structure chart of epoxy pole in Fig. 1；

Fig. 8 is the sectional view of epoxy pole in Fig. 1；

Fig. 9 is the part-structure figure in Fig. 1 at lower cover；

Figure 10 is the structure chart of another angles of Fig. 9；

Figure 11 is the structure chart of fulcrum bearing in Fig. 9；

The structure chart of Figure 12 Shi Tu2Zhong interlocking mechanisms；

The structure chart of another state of Figure 13 Shi Tu2Zhong interlocking mechanisms.

Specific embodiment

It is to make purpose, technical scheme and the advantage of this utility model embodiment clearer, new below in conjunction with this practicality Accompanying drawing in type embodiment, is clearly and completely described to the technical scheme in this utility model embodiment, it is clear that retouched The embodiment stated is a part of embodiment of this utility model, rather than the embodiment of whole.Based on the enforcement in this utility model Example, the every other embodiment obtained under the premise of creative work is not made by those of ordinary skill in the art are belonged to The scope of this utility model protection.

High voltage load switch-fuse combined electric apparatus, as depicted in figs. 1 and 2, including frame 1 and by high voltage load switch- The combined electrical apparatus component of fuse composition, combined electrical apparatus component are installed in frame 1, and the both sides of frame 1 are fixed with peace respectively Dress plate 12, isolation axle 61, load axis 62 and grounding shaft that combined electrical apparatus component has operating mechanism 6 and controlled by operating mechanism 63, isolate axle 61, load axis 62 and grounding shaft 63 and be hubbed in frame 1 and be located between the installing plate 12 of 1 both sides of frame, isolation The two ends of axle 61, load axis 62 and grounding shaft 63 are each passed through and are hubbed at the installing plate 12 of 1 both sides of frame, and operating mechanism 6 is pacified It is mounted on the installing plate 12 of frame side and connects with axle 61, load axis 62 and grounding shaft 63 is isolated, the installation of 1 opposite side of frame Plate 12 is provided with the interlocking mechanism of isolation axle 61, load axis 62 and grounding shaft 63；

With reference to shown in Figure 12 and Figure 13, the interlocking mechanism includes the first interlocking arm 71, the second interlocking arm 72, the 3rd interlocking Arm 73, the 4th interlocking arm 74 and escapement 75, the first interlocking arm 71, the second interlocking arm 72 and the 4th interlocking arm 74 are respectively fixedly connected with In isolation axle 61, the end of load axis 62 and grounding shaft 63, the first interlocking arm 71 and the second interlocking arm 72 about against setting simultaneously Can be rotated simultaneously, the 3rd interlocking arm 73 and escapement 75 are hubbed in the frame 1, and the 3rd interlocking arm 73 is arranged on second Between hammerlock 72 and the 4th interlocking arm 74, the second interlocking arm 72 is connected by blocking lever 76 with the 3rd interlocking arm 73, escapement 75 are arranged between the 3rd interlocking arm 73 and the 4th interlocking arm 74, the first interlocking arm 71, the second interlocking arm 72, the 3rd interlocking arm 73 With the first locating slot 711, the second locating slot 721, the 3rd locating slot 731 and are respectively equipped with 74 neighboring of the 4th interlocking arm Four locating slots 741；

With reference to shown in Figure 12 and Figure 13, during conducting load, the earthed switch in the drive combined electrical apparatus component of grounding shaft 63 enters Row separating brake, grounding shaft 63 can drive the 4th locating slot 741 of the 4th interlocking arm 74 to turn to position upward, and isolation axle 61 is rotated And drive the disconnecting switch in combined electrical apparatus component to be closed a floodgate, the first locating slot 711 of the first interlocking arm 71 can turn to The position that the neighboring of the second interlocking arm 72 fastens（Not shown in this kind of state diagram）, so as to when load is turned on, isolate Axle 61 can not carry out on-load separating brake, and load axis 62 are rotated and drive the on-load switch in combined electrical apparatus component to be closed a floodgate, and Two interlocking arms 72 can drive the 3rd interlocking arm 73 to be rotated by blocking lever 76, and the neighboring of the 3rd interlocking arm 73 can push Escapement 75 simultaneously makes the position that the lower rotation of escapement 75 fastens to the 4th locating slot 741 with the 4th interlocking arm 74, so as to When load is turned on, grounding shaft 63 can not carry out combined floodgate ground connection；

With reference to shown in Figure 12 and Figure 13, when disconnecting load, load axis 62 are rotated and drive the load in combined electrical apparatus component Switch carries out separating brake, and the second interlocking arm 72 can drive the 3rd interlocking arm 73 to be rotated by blocking lever 76, and make the 3rd interlocking 3rd locating slot 731 of arm 73 turns to position directed downwardly, isolates axle 61 and rotates and drive keeping apart in combined electrical apparatus component Put row separating brake into, the second locating slot 721 of the second interlocking arm 72 can be turned to and be fastened with 71 neighboring of the first interlocking arm Position, so as to when load disconnects, and isolates axle 61 and can not be closed a floodgate, and grounding shaft 63 drives connecing in combined electrical apparatus component Ground switch carries out combined floodgate ground connection, and the neighboring of the 4th interlocking arm 74 can push up escapement 75 and rotate the top of escapement 75 To the position that the 3rd locating slot 731 with the 3rd interlocking arm 73 fastens, so as to on-load switch can not be closed a floodgate.

The present embodiment realizes the mechanical interlocking for isolating axle, load axis and grounding shaft by arranging interlocking mechanism, it is to avoid by mistake Operation.On the one hand, when load is turned on, switch cubicle carries out following action successively：Shut cabinet door --- point earthed switch --- to close Disconnecting switch --- close on-load switch, by arranging interlocking mechanism, it is to avoid the disconnecting switch on-load separating brake when load is turned on And earthed switch is closed a floodgate；On the other hand, when load is disconnected, switch cubicle carries out following action successively：Separate load to open Close and --- divide disconnecting switch --- closing earthed switch --- to open cabinet door, by arranging interlocking mechanism, earthed switch can be closed Lock, while avoid keeping apart when load is disconnected closing lock and on-load switch is closed a floodgate.So as to realize safety interlocking, it is ensured that The safe operation of electric equipment, it is safe and reliable.

Preferably, as shown in Figure 12 and Figure 13, the escapement 75 is articulated in frame 1 by fork 77,75 pivot joint of escapement On fork 77.

Preferably, as shown in Figure 12 and Figure 13, the 3rd interlocking arm 73 is coaxially connected with interlocking shaft 78,78 pivot of interlocking shaft It is connected in the frame 1.

On the basis of above-described embodiment, as shown in FIG. 1 to 3, the combined electrical apparatus component also includes disconnecting switch, bears Lotus switch, earthed switch and fuse 5, the isolation axle 61, load axis 62 and grounding shaft 63 can control disconnecting switch respectively, bear Lotus switchs and earthed switch carries out point/conjunction, and the top of frame 1 is provided with installation frame 11, and installation frame 11 is fixedly connected on frame 1 Between the installing plate 12 of both sides, specifically, installation frame 11 is horizontally disposed with, and frame 1 is common with installing plate 12 and installation frame 11 Accommodating chamber is surrounded, there is on installation frame 11 installing hole 111, with reference to shown in Fig. 4, on-load switch is arranged side by side and one with three Body formed epoxy pole 31, three epoxy poles 31 protrude to form a flange 311 to its surrounding respectively, three epoxy poles 31 On flange 311 side-by-side be collectively forming the insulating barrier being engaged with 11 upper installing hole 111 of installation frame, insulating barrier Both sides up and down form bus-bar room and switch gear room respectively, with reference to shown in Fig. 5, in each epoxy pole 31, be provided with vacuum interrupter 32, the upper end of vacuum interrupter 32 is connected with disconnecting switch, and the lower end of vacuum interrupter 32 is connected with the upper end of fuse 5, is melted The lower end of disconnected device 5 is connected with earthed switch.

When combined electrical apparatus component is assembled, the epoxy pole in combined electrical apparatus component is vertical from top to bottom flat to the present embodiment It is mounted on the installation frame of frame, specifically, epoxy pole is straight down through the installing hole of installation frame, and makes epoxy pole On flange secure fit in the installing hole of installation frame, so as to realize that the installation to combined electrical apparatus is fixed.

In the present embodiment, the vertical paperback mode of combined electrical apparatus component has advantages below：

1st, the distribution of force of switch cubicle is balanced, uniform, and the overall weight of combined electrical apparatus will not be made all to concentrate on switch cubicle A certain position, the good stability of integral device.

Although the 2, combined electrical apparatus is heavier, whole installation frame can be supported fixation to combined electrical apparatus, support across Degree and Area of bearing are big, it is ensured that the stability of switch cubicle and combined electrical apparatus, switch cubicle will not be deformed, and then door of switch cabinet On handle hole and operating mechanism on handle hole can corresponding matching exactly, so as to accurately be controlled to combined electrical apparatus, The handle hole on door of switch cabinet should not thus be increased, it is ensured that the strength and stability of switch cubicle.

3rd, the epoxy pole in combined electrical apparatus is that paperback, on the installation frame of frame, is avoided the need for during paperback from top to bottom Combined electrical apparatus is lifted or is held in the palm on artificial, is placed directly on installation frame, it is simple to operate, it is not necessary to many people's coordinating operations, During paperback, working space is big, and task difficulty is little, and working performance is high, and cost of labor is low.

4th, after completing the paperback of combined electrical apparatus, the both sides up and down of insulating barrier automatically form bus-bar room and switch gear room respectively, Therefore bus-bar room and switch gear room need not be fabricated separately again, and assembly process is simple, and manufacture efficiency is high.

On the basis of above-described embodiment, it is preferred that as shown in Figure 6 to 8, the epoxy pole 31 has lower house 314, the surrounding of the top down housing 314 of lower house 314 is protruded to be formed and 314 integrally formed square-shaped flange 311 of lower house, Top in lower house 314 is provided with accommodating chamber 312, and the vacuum interrupter 32 is arranged in accommodating chamber 312, vacuum interrupter 32 With full skirt, vacuum interrupter 32 can be directly installed in epoxy pole made by epoxy resin without the need for sulfuration.

In the present embodiment vacuum interrupter be not as prior art using sealing technique sealing in pole, but by band The vacuum interrupter of full skirt is directly installed in epoxy pole, and assembling is simple, is not in the underproof problem of sealing, manufacture effect Rate is high, safe and reliable, additionally, the vacuum interrupter being fit directly in epoxy pole is relative to the vacuum extinction in pole Room can become tubbiness, on the one hand reduce the height of combined electrical apparatus, reduce the volume of combined electrical apparatus, be on the other hand easy to fuse and Disconnecting switch and the connection of the upper and lower contact of vacuum interrupter, reduce assembly difficulty.

On the basis of above-described embodiment, it is preferred that as shown in Figure 6 to 8, the flange 311 upwardly extends to form one With 314 integrally formed upper shell 313 of lower house, the top of accommodating chamber 312 is provided with and separates upper shell 313 with lower house 314 Dividing plate 315, the upper end of vacuum interrupter 32 are connected with into line bar 34, are entered line bar 34 through dividing plate 315 and are extended downward vacuum In arc-chutes 32, enter 34 upper end of line bar and be connected with static contact 35, static contact 35 is fixedly installed on dividing plate 315, upper shell 313 Top is located at the top of static contact 35 and is fixed with junction block 100；

As shown in Figure 6 to 8, the isolation axle 61 is arranged between the epoxy pole 31 and frame 1 and is located at described The lower section of flange 311, the disconnecting switch is with the isolation knife 21 corresponding with static contact 35, the first end pivot joint of isolation knife 21 On static contact 35, isolation axle 61 is connected with isolation knife 21, and isolation knife 21 can be driven to be rotated, so that the of isolation knife 21 Two ends and upper junction block 100 are carried out point/are closed.

On the basis of above-described embodiment, it is preferred that as shown in Fig. 5～Fig. 8, the upper shell 313 be " ㄥ " shape, upper casing " ㄥ " shape storage tank 3131 is provided with body 313, the upper side near frame 1 of the flange 311 is provided with through hole 3132, the through hole 3132 are connected with storage tank 3131；

As shown in Fig. 5～Fig. 8, isolation axle 61 is connected with isolation knife 21 by linkage, and linkage is arranged on upper casing In body 313, isolate it is corresponding with linkage on axle 61 be provided with first and turn wall 611, linkage include first connecting rod 22, the Two connecting rods 23 and third connecting rod 24, first connecting rod 22 are passed down through through hole 3132 and make the first end of first connecting rod 22 be articulated in phase Corresponding first turns on wall 611, and the middle part of second connecting rod 23 is articulated in upper shell 313 on the two side of storage tank 3131, the The first end of two connecting rods 23 is articulated in the second end of first connecting rod 22, and the first end of third connecting rod 24 is articulated in second connecting rod 23 Second end, the second end of third connecting rod 24 are articulated in isolation knife 21, and third connecting rod 24 can drive isolation knife 21 to be rotated, and The second end and the upper junction block 100 that isolation knife 21 can be made carries out point/closes.

On the basis of above-described embodiment, it is preferred that as shown in fig. 6, the fuse 5 is detachably arranged at epoxy pole 31 side away from the frame 1, the upper end of fuse 5 are connected to the lower end of vacuum interrupter 32 by the portion 53 that is flexible coupling, Lower end of the upper end of fuse 5 higher than vacuum interrupter 32.

In the present embodiment, the upper end of fuse is connected to the lower end of vacuum interrupter by the portion that is flexible coupling, so as to by fuse Upper shifting, further shortens the length and volume of combined electrical apparatus so that combined electrical apparatus is compacter.

On the basis of above-described embodiment, it is preferred that as shown in Figure 4 and Figure 6, the upper end of fuse 5 is connected with fixed melting The upper molten card 51 of disconnected device 5, upper molten card 51 are fixed on epoxy pole 31, the copper that portion 53 is stepped rising that is flexible coupling Row, the lower end in the portion 53 that is flexible coupling are connected with the lower end of vacuum interrupter 32, and the upper end in the portion 53 that is flexible coupling is connected with upper molten card 51.

On the basis of above-described embodiment, it is preferred that as shown in Figure 5 and Figure 6, the load axis 62 are arranged on the isolation The lower section of axle 61, the lower end of the vacuum interrupter 32 are connected with lower pull bar 33, and load axis 62 pass through operating mechanism and lower pull bar 33 connections, and can drive lower pull bar 33 to move up and down, divide/conjunction with realize dynamic/static contact 35 in vacuum interrupter 32；

As shown in Figure 5 and Figure 6, operating mechanism includes insulation pulling plate 36, excess of stroke bar assembly 37, the first end of insulation pulling plate 36 It is articulated on lower pull bar 33, insulation pulling plate 36 is through the epoxy pole 31 is near the side wall of the frame 1 and is articulated in the side On wall, the second end of insulation pulling plate 36 is extended between epoxy pole 31 and the frame 1, the lower end pivot joint of excess of stroke bar assembly 37 It is at the second end of insulation pulling plate 36, corresponding with operating mechanism on load axis 62 to be provided with second and turn wall 621, excess of stroke bar assembly 37 Upper end be articulated in second and turn on wall 621.

In the present embodiment, operating mechanism and fuse are separately positioned on the both sides of epoxy pole, and operating mechanism and fuse are all Carry out the upper shifting of certain distance so that combination and electrical equipment or so stress balance, uniform, and then make the uniform force of switch cubicle, flat Weighing apparatus, the good stability of switch cubicle, also so that combined electrical apparatus compact conformation, will not be such that the overall weight of combined electrical apparatus all concentrates on out The a certain position of pass cabinet, can also shorten the length of combined electrical apparatus in addition, reducing the volume of combined electrical apparatus, more suitable using this structure The combined electrical apparatus of vertical flush mounting type is closed, the requirement of vertical paperback is preferably met.

In the present embodiment, side of the operating mechanism in epoxy pole, compares the traditional actuating below vacuum interrupter Mechanism, shortens dramatically can the height of whole combined electrical apparatus；The arrangement of whole combined electrical apparatus is facilitated to install, while the of isolation knife One end is hinged with the static contact of vacuum interrupter upper end, realizes that disconnecting switch is connected with the zero distance of on-load switch, therefore whole Closely, small volume is conducive to the miniaturization of switch cubicle to body structure.

On the basis of above-described embodiment, it is preferred that as shown in Fig. 7, Fig. 6 and Fig. 4, the bottom tool of the lower house 314 The side away from the frame 1 for having under shed 3141, lower house 314 is provided with side opening 3142, and side opening 3142 is arranged on institute State the lower section of vacuum interrupter 32 and extend to the bottom of lower house 314, be removably provided with to cover down on lower house 314 and open The lower cover 38 of mouth 3141 and side opening 3142, lower cover 38 extend downward the lower section of lower house 314, the lower end connection of fuse 5 There is the lower molten card 52 of fixed fuse 5, lower molten card 52 is fixed on the bottom of lower cover 38, and 5 lower end of fuse is also associated with lower wiring Seat 200.

In the present embodiment, lower cover has multiple action, on the one hand plays a part of to cover lower house in epoxy pole, and then The lower house of epoxy pole can be sealed, play insulating effect, it is ensured that safety, on the other hand, the lower end of fuse is direct The bottom of lower cover is connected to, plays a part of to support fixed fuse so that be combined electrical apparatus simple structure, compact, and then reduced The volume of combined electrical apparatus.

On the basis of above-described embodiment, it is preferred that as shown in Fig. 6 and Fig. 4, the earthed switch includes 42 He of earthing Ground connection cutter holder 41, earthing 42 is connected with the grounding shaft 63 by linking arm 43, be grounded cutter holder 41 be fixedly connected on it is described under The bottom of lid 38, ground connection cutter holder 41 are located at lower cover 38 near the side of the frame 1, and grounding shaft 63 can be driven by linking arm 43 Earthing 42 is rotated, and can be grounded knife 42 and be grounded dividing/closing for cutter holder 41.

In the present embodiment, lower cover also acts as the effect of the ground connection cutter holder that is connected, and grounding shaft can be driven by linking arm and is grounded Knife is rotated, and so as to be grounded/the conjunction that divides of knife and ground connection cutter holder, ground connection cutter holder is directly anchored to the bottom of lower cover, passes through The multiple function of lower cover, it is possible to use lower cover carries out simultaneously sealing epoxy pole, supports fixed fuse, is fixedly connected earthing Folder, so as to the simplified combined electrical apparatus structure of high degree so that combined electrical apparatus structure is compacter, further reduces combined electrical apparatus Volume.

On the basis of above-described embodiment, it is preferred that as shown in Fig. 9, Figure 10 and Figure 11, also including rotary shaft 64, pull bar 71st, the first bearing pin 72, the second bearing pin 73 and fulcrum bearing 74；

As shown in Fig. 9, Figure 10 and Figure 11, the lower cover 38 is downwardly extending two side plates 384 being oppositely arranged, two Corresponding respectively on side plate 384 to be provided with an arcuate groove 3841, the first bearing pin 72 is arranged between two side plates 384, the first pin The two ends of axle 72 are limited in the arcuate groove 3841 of two side plates 384, the first bearing pin 72 can the two ends of arcuate groove 3841 it Between move, rotary shaft 64 is arranged on the top of the grounding shaft 63 and is hubbed in the frame 1, the first end of pull bar 71 It is connected with rotary shaft 64, the second end of pull bar 71 extends between two side plates 384 and is articulated on the first bearing pin 72；

As shown in Fig. 9, Figure 10 and Figure 11, the second bearing pin 73 is arranged between two side plates 384 and positioned at the described first pin The lower section of axle 72, the two ends of the second bearing pin 73 are articulated on two side plates 384, and fulcrum bearing 74 is arranged on the second side of lower cover 38, Fulcrum bearing 74 upwardly extends to be formed and 74 integrally formed two cursors 741 of fulcrum bearing, and two cursors 741 are to away from supporting The direction of seat 74 inclines certain angle, and two cursors 741 are separately positioned on the outside of two side plates 384, two in fulcrum bearing 74 The top of individual cursor 741 is articulated in the two ends of the first bearing pin 72 respectively, the bottom difference of two cursors 741 in fulcrum bearing 74 It is articulated in the two ends of the second bearing pin 73；

As shown in Fig. 9, Figure 10 and Figure 11, arcuate groove 3841 has first end and the second end, and rotary shaft 64 can pass through Pull bar 71 drives the first bearing pin 72 to move against to the first end of arcuate groove 3841, and lower cover 38 is strained and fixed, together When fulcrum bearing 74 can be rotated up to the position for supporting fixed fuse 5 around the second bearing pin 73；Rotary shaft 64 can also pass through pull bar 71 the first bearing pins 72 of drive are moved to the second end of arcuate groove 3841, and unclamp lower cover 38, while fulcrum bearing 74 can be around the Two bearing pins 73 are swung down to away from the position for supporting fixed fuse 5.

In one side the present embodiment, rotary shaft can tense lower cover by pull bar, and then can realize fixing the reliability of lower cover, Lower cover is avoided to drop, it is ensured that insulation stability, it is safe and reliable；Under in another aspect the present embodiment, rotary shaft can also be unclamped Lid, and then ensure the smooth dismounting and assembling of lower cover.

Specifically, as shown in Fig. 9, Figure 10 and Figure 11, rotary shaft 64 can drive the movement of the first bearing pin 72 to support by pull bar 71 By the first end to arcuate groove 3841, and lower cover 38 is strained and fixed, at the same fulcrum bearing 74 can around the second bearing pin 73 to On turn to the position for supporting fixed fuse；Rotary shaft 64 can also drive the first bearing pin 72 to arcuate groove 3841 by pull bar 71 The second end move, and unclamp lower cover 38, at the same fulcrum bearing 74 can be swung down to around the second bearing pin 73 it is solid away from supporting Determine the position of fuse.

In the present embodiment, fulcrum bearing is connected directly between on lower lid by the first bearing pin and the second bearing pin, it is not necessary to separately fixed It is connected in frame, simple structure, structure can be simplified, and make overall structure more compact, and then the volume of switch cubicle can be reduced.

In one side the present embodiment, rotary shaft drives the first bearing pin to move against to the first end of arcuate groove by pull bar When, lower cover can not only be strained and fixed, moreover it is possible to while making fulcrum bearing be rotated up fusing fixed to support around the second bearing pin The position of device, plays a part of to support fixed fuse then；In another aspect the present embodiment, rotary shaft can be driven by pull bar First bearing pin to the second end of arcuate groove move when, lower cover can not only be unclamped, moreover it is possible to while making fulcrum bearing around the second bearing pin It is swung down to away from the position for supporting fixed fuse, and then is easy to the dismounting and assembling of fuse.

On the basis of above-described embodiment, it is preferred that as shown in Figure 9 and Figure 10, the lower cover 38 is also downwardly extending The engagement plate 385 of two side plates 384 of connection, described two side plates 384 and engagement plate 385 surround jointly one and allow bit space 386, should Bit space 386 is allowed to open wide to the first side of lower cover 38.

In the present embodiment, the first bearing pin move in bit space allowing, the present embodiment by arranging engagement plate, one Aspect can be used in installing fixed lower molten card, it is lower it is molten block for supporting fuse, on the other hand can be used in the ground connection that is connected Cutter holder, so as to realize carrying out multiple utilization to lower cover, further simplifies lower molten card and is grounded the attachment structure of cutter holder, reduce switch Cabinet is accumulated, and is conducive to the miniaturization of switch cubicle.

On the basis of above-described embodiment, it is preferred that as shown in Figure 9 and Figure 10, also it is used to install described in Fig. 4 including one The V shaped slab 387 of ground connection cutter holder, the fulcrum bearing 74 are arranged on the outside of engagement plate 385 and are spaced between engagement plate 385 certain Distance, V shaped slab 387 have two wooden partitions, and wooden partition is passed through between fulcrum bearing 74 and engagement plate 385 upwards and is fixed on rank On the lateral wall of fishplate bar 385, another wooden partition passes through and inclines the rank that certain angle is extended upwardly to from the bottom of engagement plate 385 On the inside of fishplate bar 385, another wooden partition is used to install dead earth cutter holder, it should be noted that the inner side of engagement plate 385 refers to Engagement plate 385 is located at and allows the side of bit space 386, and the outside of engagement plate 385 refers to engagement plate 385 away from allowing bit space 386 Side.

On the basis of above-described embodiment, it is preferred that as shown in Figure 9 and Figure 10, the fulcrum bearing 74 and the cursor Linked into an integrated entity by support arm 742 between 741.

On the basis of above-described embodiment, it is preferred that as shown in Figure 9 and Figure 10, the rotary shaft 64 is provided with and turns wall 75, The first end of the pull bar 71 is articulated in and turns on wall 75.

Finally it should be noted that：Various embodiments above is only illustrating the technical solution of the utility model, rather than which is limited System；Although being described in detail to this utility model with reference to foregoing embodiments, one of ordinary skill in the art should Understand：Which still can be modified to the technical scheme described in foregoing embodiments, or to which part or whole Technical characteristic carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this practicality new The scope of each embodiment technical scheme of type.

Claims (10)

1. high voltage load switch-fuse combined electric apparatus, including frame and the combination electricity being made up of high voltage load switch-fuse Device assembly, combined electrical apparatus component are installed in frame, it is characterised in that the both sides of frame are fixed with installing plate respectively, combination Isolation axle, load axis and grounding shaft that electric appliance component has operating mechanism and controlled by operating mechanism, isolate axle, load axis and connect The earth's axis is hubbed in frame and is located between the installing plate of frame both sides, and the two ends of isolation axle, load axis and grounding shaft are worn respectively Cross and be hubbed at the installing plate of frame both sides, operating mechanism be arranged on the installing plate of frame side and with isolate axle, load axis Connect with grounding shaft, the installing plate of frame opposite side is provided with the interlocking mechanism of isolation axle, load axis and grounding shaft；

The interlocking mechanism includes the first interlocking arm, the second interlocking arm, the 3rd interlocking arm, the 4th interlocking arm and escapement, first Hammerlock, the second interlocking arm and the 4th interlocking arm are respectively fixedly connected with the end of isolation axle, load axis and grounding shaft, the first interlocking , up and down against arranging and can be rotated simultaneously, the 3rd interlocking arm and escapement are hubbed in the frame for arm and the second interlocking arm, 3rd interlocking arm is arranged between the second interlocking arm and the 4th interlocking arm, and the second interlocking arm and the 3rd interlocking arm are joined by blocking lever Dynamic connection, escapement are arranged between the 3rd interlocking arm and the 4th interlocking arm, the first interlocking arm, the second interlocking arm, the 3rd interlocking arm With the first locating slot, the second locating slot, the 3rd locating slot and the 4th locating slot are respectively equipped with the 4th interlocking arm neighboring；

During conducting load, grounding shaft can drive the 4th locating slot of the 4th interlocking arm to turn to position upward, the first interlocking arm The first locating slot can turn to the position fastened with the neighboring of the second interlocking arm, the second interlocking arm can pass through blocking lever The 3rd interlocking arm is driven to be rotated, the neighboring of the 3rd interlocking arm can push escapement and make the lower rotation of escapement to the The position that 4th locating slot of four interlocking arms fastens；

When disconnecting load, the second interlocking arm can drive the 3rd interlocking arm to be rotated by blocking lever, and make the 3rd interlocking arm 3rd locating slot turns to position directed downwardly, and the second locating slot of the second interlocking arm can be turned to and the first interlocking arm neighboring The position for fastening, the neighboring of the 4th interlocking arm can push up escapement and make to turn at the top of escapement and the 3rd interlocking The position that 3rd locating slot of arm fastens.

2. high voltage load switch-fuse combined electric apparatus according to claim 1, it is characterised in that the combined electrical apparatus Component also includes disconnecting switch, on-load switch, earthed switch and fuse, the isolation axle, load axis and grounding shaft difference energy Control disconnecting switch, on-load switch and earthed switch carry out point/conjunction, and installation frame is provided with the top of frame, and installation frame is fixed It is connected between the installing plate of frame both sides, there is on installation frame installing hole, on-load switch is arranged side by side and one with three Body formed epoxy pole, three epoxy poles protrude to form a flange to its surrounding respectively, the flange on three epoxy poles It is side-by-side to be collectively forming the insulating barrier being engaged with installation frame upper installing hole, the difference shape of both sides up and down of insulating barrier Into bus-bar room and switch gear room, vacuum interrupter in each epoxy pole, is provided with, the upper end of vacuum interrupter is connected with disconnecting switch, The lower end of vacuum interrupter is connected with the upper end of fuse, and the lower end of fuse is connected with earthed switch.

3. high voltage load switch-fuse combined electric apparatus according to claim 2, it is characterised in that the epoxy pole With lower house, the surrounding of the top down housing of lower house is protruded to be formed and the integrally formed square-shaped flange of lower house, lower casing Internal top is provided with accommodating chamber, and the vacuum interrupter is arranged on and accommodates intracavity.

4. high voltage load switch-fuse combined electric apparatus according to claim 3, it is characterised in that the flange is upwards Extend and form one and the integrally formed upper shell of lower house, at the top of accommodating chamber, be provided with the dividing plate for separating upper shell and lower house, The upper end of vacuum interrupter is connected with into line bar, is entered line bar through dividing plate and is extended downward in vacuum extinction room, enters in line bar End is connected with static contact, and static contact is fixedly installed on dividing plate, and the top of upper shell is located above static contact and is fixed with Junction block；

The isolation axle is arranged between the epoxy pole and frame and is located at the lower section of the flange, the disconnecting switch tool The first end for having the isolation knife corresponding with static contact, isolation knife is articulated on static contact, and isolation axle is connected with isolation knife, and energy Isolation knife is driven to be rotated, so that the second end of isolation knife and upper junction block carry out point/conjunction.

5. high voltage load switch-fuse combined electric apparatus according to claim 4, it is characterised in that the upper shell is " ㄥ " shape, is provided with " ㄥ " shape storage tank in upper casing body, be provided with through hole near the side of frame on the flange position, the through hole with hold Put groove connection；

Isolation axle is connected with isolation knife by linkage, and linkage is arranged in upper casing body, with linkage on isolation axle Corresponding to be provided with first and turn wall, linkage includes first connecting rod, second connecting rod and third connecting rod, and first connecting rod is passed down through Through hole simultaneously makes the first end of first connecting rod be articulated in corresponding first and turn on wall, is articulated in upper casing body in the middle part of second connecting rod On the two side of storage tank, the first end of second connecting rod is articulated in the second end of first connecting rod, the first end pivot joint of third connecting rod At the second end of second connecting rod, the second end of third connecting rod is articulated in isolation knife, and third connecting rod can drive isolation knife to carry out turning It is dynamic, and the second end of isolation knife and the upper junction block can be made to carry out point/conjunction.

6. high voltage load switch-fuse combined electric apparatus according to claim 3, it is characterised in that the fuse can Dismounting is arranged on the side away from frame of the epoxy pole, and the upper end of fuse is connected to vacuum extinction by the portion that is flexible coupling The lower end of room, the upper end of fuse are higher than the lower end of vacuum interrupter.

7. high voltage load switch-fuse combined electric apparatus according to claim 2, it is characterised in that the load axis set Put in the lower section of the isolation axle, the lower end of the vacuum interrupter is connected with lower pull bar, and load axis are by operating mechanism with Pull bar connects, and can drive lower pull bar to move up and down, and divides/conjunction with realize dynamic/static contact in vacuum extinction room；

Operating mechanism includes insulation pulling plate, excess of stroke bar assembly, and the first end of insulation pulling plate is articulated on lower pull bar, and insulation pulling plate is worn Cross the epoxy pole near the frame side wall and pivot joint on the side wall, the second end of insulation pulling plate extends to epoxy pole Between post and the frame, the lower end of excess of stroke bar assembly is articulated in the second end of insulation pulling plate, with operating mechanism phase on load axis Corresponding to be provided with second and turn wall, the upper end of excess of stroke bar assembly is articulated in second and turns on wall.

8. high voltage load switch-fuse combined electric apparatus according to claim 3, it is characterised in that the lower house The side away from the frame that bottom has under shed, lower house is provided with side opening, and side opening is arranged on the vacuum extinction The lower section of room simultaneously extends to the bottom of lower house, and the lower cover that can cover under shed and side opening is removably provided with lower house, Lower cover extends downward the lower section of lower house, and the lower end of fuse is connected with the lower molten card of fixed fuse, and lower molten fixing is scheduled on The bottom of lower cover, fuse lower end are also associated with lower junction block.

9. high voltage load switch-fuse combined electric apparatus according to claim 8, it is characterised in that the earthed switch Including earthing and ground connection cutter holder, earthing is connected with the grounding shaft by linking arm, and earthing folder is fixedly connected on described The bottom of lower cover, ground connection cutter holder are located at lower cover near the side of the frame, and grounding shaft can drive earthing to enter by linking arm Row is rotated, and can be grounded knife and be grounded dividing/closing for cutter holder.

10. high voltage load switch-fuse combined electric apparatus according to claim 9, it is characterised in that also including rotation Axle, pull bar, the first bearing pin, the second bearing pin and fulcrum bearing；

The lower cover is downwardly extending two side plates being oppositely arranged, corresponding respectively on two side plates to be provided with an arc Groove, the first bearing pin are arranged between two side plates, and the two ends of the first bearing pin are limited in the arcuate groove of two side plates, the first pin Axle can be moved between the two ends of arcuate groove, and rotary shaft is arranged on the top of the grounding shaft and is hubbed on the frame On, the first end of pull bar is connected with rotary shaft, and the second end of pull bar extends between two side plates and is articulated on the first bearing pin；

Second bearing pin is arranged between two side plates and is located at the lower section of first bearing pin, and the two ends of the second bearing pin are articulated in two On individual side plate, fulcrum bearing is arranged on the second side of lower cover, and fulcrum bearing upwardly extends to form two integrally formed with fulcrum bearing turns Swing arm, two cursors incline certain angle to the direction away from fulcrum bearing, and two cursors are separately positioned on two side plates Outside, in fulcrum bearing, the top of two cursors is articulated in the two ends of the first bearing pin respectively, the bottom of two cursors in fulcrum bearing Portion is articulated in the two ends of the second bearing pin respectively；

Arcuate groove has first end and the second end, and rotary shaft can drive the first bearing pin to move against to arcuate groove by pull bar First end, and lower cover is strained and fixed, while fulcrum bearing can be rotated up to supporting fixed fusing around the second bearing pin The position of device；Rotary shaft can also drive the first bearing pin to move to the second end of arcuate groove by pull bar, and unclamp lower cover, together When fulcrum bearing can be swung down to away from the position for supporting fixed fuse around the second bearing pin.