CN109687300A - Door interlock above and below switchgear - Google Patents

Abstract

The present invention relates to door interlocks above and below a kind of switchgear, door interlock includes lock body to switchgear up and down, Xiamen touching structure and upper door catch are provided on lock body, link mechanism is sequentially connected between Xiamen touching structure and upper door catch, it is touched positioned at Xiamen and is provided with driving dog in the drive path between structure and upper door catch, interlock further includes for the push rod that can driving dog be pushed and be avoided open upper door catch when visiting and closing on visiting to be arranged in, it is provided on push rod when Xiamen is closed with the cooperation of upper door catch locking and by the lockhole for locking of visiting, interlock further includes being arranged on lock body to be used for the lock pin resetting-mechanism of block reset spring and the driving when Xiamen the is opened upper door catch and lockhole disengaging that are arranged on lock body that driving dog resets, principle is fairly simple, it prevents from omitting generating and be strayed into The operation of live electric cable room, improves five anti-interlocks, ensure that the reliability and safety in operating process.

Description

Door interlock above and below switchgear

Technical field

The present invention relates to door interlocks above and below a kind of switchgear.

Background technique

Medium voltage switchgear equipment is metal armoured structure, and Medium Voltage Switchgear latter half is cable vault, first device of cable vault Part is to be fixedly mounted, when carrying out maintenance and attended operation to switchgear, mainly for its cable vault, in the case where often charging Back door is opened, mistakenly entering into charged isolation, this does not meet five anti-requirements of medium voltage switchgear equipment, and common interlocking method is by connecing Ground switch and rear gate interlock；And because the volume of medium voltage switchgear equipment is larger, back door, which is generally divided into, visits and Xiamen two parts, and people Often only design and interlocked between earthing switch and Xiamen, and have ignored the protection visited, there are some potential safety problemss.

The design method that switchgear is visited in industry at present is in the premise for considering that intensity prevents internal arcing failure injury Under, the basic fixed form using fastening screw on sealing plate of visiting of switchgear, this mounting means is after removable screw, Xiamen It does not constrain visiting, can open in any condition, very big security risk is brought to operation, the maintenance of switchgear.For Meet five anti-requirements, when needing to design a kind of Xiamen and being not switched on, visiting can not be opened；It visits when being not turned off, Xiamen can not close The interlock closed.

Summary of the invention

The purpose of the present invention is to provide door interlocks above and below a kind of switchgear, to solve switchgear in the prior art There is no the problem of reciprocal interlocking between upper-lower door.

To achieve the above object, the technical solution of door interlock is above and below switchgear of the invention:

Scheme 1: upper and lower door interlock, including lock body are provided with Xiamen touching structure and upper door catch, Xiamen touching on lock body It is sequentially connected with link mechanism between structure and upper door catch, is additionally provided on the lock body positioned at Xiamen touching structure and is visited The driving dog in drive path between lock pin, it is described up and down door interlock further include for be arranged in visit on push away Driving dog can be pushed open when visiting and closing and avoid upper door catch by bar, the push rod, and the Xiamen touching structure has The stopper section visited when being not turned off with the only cooperation of Xiamen shelves, be provided on the push rod when Xiamen is closed with upper door catch locking Cooperate the lockhole for locking of visiting, the door interlock up and down further includes being arranged on lock body to be used to answer driving dog The block reset spring of position, the door interlock up and down further include being arranged on lock body to drive upper door lock when Xiamen is opened The lock pin resetting-mechanism that pin is detached from the lockhole.

Scheme 2: on the basis of scheme 1, the lock body includes bracket, is provided on the bracket for placing transmission gear The holding tank of block is provided with mounting hole on the cell wall of the holding tank, and the upper door catch is installed in mounting hole and can hold Slot of receiving is interior to be moved along mounting hole axial reciprocating.

Scheme 3: on the basis of scheme 2, the bracket is the plate structure of " oneself " font, and the holding tank is by bracket Lower half slot is constituted, and the mounting hole penetrates through the horizontal edge of bracket along the vertical direction, and the lock pin resetting-mechanism is set to the appearance It receives in the upper half slot of slot.

Scheme 4: on the basis of scheme 3, the upper door catch is driven by link mechanism and appearance can be stretched to by moving down It receives in slot, the lock pin resetting-mechanism includes that answering in the slot of the upper half for applying upward active force to upper door catch is arranged in Position spring.

Scheme 5: on the basis of scheme 4, there are two the reset springs, sets up separately in the two sides of upper door catch.

Scheme 6: on the basis of scheme 3, the block back-moving spring top is set to the downside of driving dog and the bracket Between wall.

Scheme 7: on the basis of scheme 3, the link mechanism includes the transmission levers being arranged on lock body, the transmission Drive rod, the output end of Suo Oushu transmission levers mechanism and institute are connected between the input terminal of lever and Xiamen touching structure State door catch transmission cooperation.

Scheme 8: on the basis of scheme 7, there are two the brackets, is disposed side by side on the two sides of the drive rod, described There are two lever mechanisms, and the gear pin assembled together with the input terminal of two lever mechanisms is provided on the drive rod.

Scheme 9: on the basis of scheme 7, the lock body further includes the support plate for being connected on cabinet body frame, described The perforation being guided through along the vertical direction for drive rod is provided in support plate.

Scheme 10: on the basis of scheme 9, Xiamen touching structure include be rotatably arranged in support plate by Xiamen The connecting lever of driving and rotation, the stop section is the idler wheel being arranged on the input terminal of connecting lever.

The beneficial effects of the present invention are: compared with the prior art, door interlock above and below switchgear according to the present invention, It in door-closing operation, first closes and visits, driving dog evacuation is pushed by push rod, then closes Xiamen, it is dynamic that structure is touched in Xiamen Make, push link mechanism, and then push upper door catch to be inserted into lockhole and cooperate with push rod locking, realizes the shutdown connection of upper-lower door Lock；If visiting opening, Xiamen is first closed, since the block of driving dog acts on, upper door catch can not be continued to move to, therefore Xiamen Touching structure can not act, then can not close Xiamen；In opening door operation, first open Xiamen, then touching structure in Xiamen is without touching, Then drive upper door catch by deviating from lockhole under the action of lock pin resetting-mechanism, realization unlock is then i.e. openable to visit, real Driving dog, is finally reset in the movement routine of upper door catch by block reset spring by existing opening door operation；If Xiamen is closed, It first opens and visits, then due to the locking cooperation between upper door catch and lockhole, lead to push rod locking, then can not open and visit, it is real The two-way interlocking of existing upper-lower door；Principle is fairly simple, prevents from omitting the operation of generation mistakenly entering into charged cable vault, improves five anti-interlocking function Can, the security performance of product is promoted, ensure that the reliability and safety in operating process.

Detailed description of the invention

Fig. 1 is one embodiment perspective view of the door interlock up and down of switchgear of the present invention；

Fig. 2 is the rearview of Fig. 1；

Fig. 3 is the front view of Fig. 2；

Fig. 4 is the fit structure schematic diagram of the present invention or more door interlock and upper-lower door；

Fig. 5 is upper door closure state figure in Fig. 4；

Fig. 6 is lower door closure state figure in Fig. 5；

Fig. 7 is the state diagram that Xiamen touches without power transmission cooperation between structure and upper door catch in Fig. 3；

Fig. 8 is the state diagram that power transmission cooperation between structure and upper door catch is touched in Xiamen in Fig. 3；

Fig. 9 is the structural schematic diagram of bracket 1 in Fig. 3；

Figure 10 is the right view of Fig. 9；

Figure 11 is the top view of Fig. 9；

Figure 12 is the structural schematic diagram of levers support plate 16 in Fig. 3；

Figure 13 is the right view of Figure 12；

Figure 14 is the structural schematic diagram of upper door catch 14 in Fig. 3；

Figure 15 is the structural schematic diagram of drive rod 5 in Fig. 3；

Figure 16 is the structural schematic diagram of push rod 10 in Fig. 3；

Figure 17 is the structural schematic diagram of driving dog 2 in Fig. 3；

Figure 18 is the structural schematic diagram of lever plate 15 in Fig. 3；

Figure 19 is the structural schematic diagram of connecting lever 4 in Fig. 4；

Figure 20 is the structural schematic diagram of pressing plate 12 in Fig. 3；

Figure 21 is the supporting structure schematic diagram of second embodiment of switchgear of the present invention or more door interlock；

Figure 22 is the structural schematic diagram of the resetting-mechanism in the third embodiment of switchgear of the present invention or more door interlock.

Specific embodiment

Embodiments of the present invention are described further with reference to the accompanying drawing.

The specific embodiment of door interlock above and below switchgear of the invention, as shown in fig. 1 to figure 20, the upper and lower gate interlock Device is applied in switchgear, and corresponding switchgear includes cabinet body frame and 9 and the Xiamen 8 of visiting that are arranged on cabinet body frame, It is connected with the horizontal support plate 3 between upper-lower door on cabinet body frame, and is provided with interlock 17 between upper-lower door, interlocking dress Set 17 include be arranged in visit 9 inboard two extend back and spaced push rod 10, the corresponding positions on two push rods 10 The lockhole 18 for being equipped with and extending up and down is installed, which is long hole, and push rod 10 is L-shaped trigger structure, and stile, which is fixed on, visits 9 On, horizontal edge extends back and the lockhole 18 is arranged thereon.

Interlock 17 further includes the bracket 1 being arranged in support plate 3, and bracket 1 is hardened structure of the section at " oneself " font, The mounting hole 103 extended up and down is provided on the middle transverse slat of its " oneself " font, mounting hole 103 is to be less than the consistent length of lockhole 18 greatly Pore structure, the lower half slot of S-shaped are holding tank 102, and the opening direction of holding tank 102 is additionally provided with and wears on bracket 1 before It is mating to stretch to the upper door catch 14 in holding tank 102 to fill hole 103, is located at upper door lock in holding tank 102 accordingly It is provided with driving dog 2 on the grafting path of pin 14 and mounting hole 103, above-mentioned push rod 10 can be with biography when visiting 9 closing Dynamic 2 pushing tow of block cooperation, and driving dog 2 is removed, and after driving dog 2 is removed, lockhole 18 on above-mentioned push rod 10 with Mounting hole 103 is opposite, presses between driving dog 2 and the slot bottom of holding tank 102 and is provided with reset spring 21, on driving dog 2 It is provided with the limit pin shaft 22 being arranged for reset spring, the slot bottom of holding tank 102 is provided with the limit hole for limit pin shaft insertion 101, the rear end of limit pin shaft is provided with the stop nut for preventing limit pin shaft from deviating from out of slot bottom mounting hole.

Upper door catch 14 can be extended downwardly by the driving of Xiamen touching structure to holding tank 102, and structure is touched in Xiamen Output end is connected with longitudinal mandril 5 i.e. drive rod being threaded through in support plate 3, further includes being fixed at 3 upside of support plate Transmission levers, transmission levers include levers support plate 16 and the lever plate 15 for being rotatably arranged on 16 upper end of levers support plate, thick stick The both ends of bar plate 15 are provided with the lever long hole 151 extended along 15 length direction of lever plate, and the mandril 5 passes through the upper end The gear pin 51 in portion and one of lever long hole are mating in the horizontal direction, another lever long hole is visited with above-mentioned The pin shaft of the upper end setting of lock pin 14 is mating in the horizontal direction, and it further includes being articulated in support plate 3 that structure is touched in Xiamen The rotation direction of connecting lever 4, connecting lever 4 is horizontally extending, the lower end of mandril 5 be provided with for connecting lever 4 one end laterally insert The other end of the spliced eye 52 entered, connecting lever 4 extends towards front lower place, and end is provided with idler wheel 6, for cooperating with 8 pushing tow of Xiamen, It when Xiamen 8 is closed, drives idler wheel 6 to lower swing, and then the other end of connecting lever 4 is driven to be swung up, connecting lever 4 drives mandril 5 It moves up, under the action of lever mechanism, upper door catch 14 is pushed, and then upper door catch 14 is driven to stretch to lockhole 18 It is interior, realize the locking of interlocking mechanism.

Above-mentioned levers support plate 16 is L shaped plate, and bottom edge 163 is fixed on the upside of middle beam, is arranged on stile 162 The mounting hole 161 for thering is lever plate 15 to be rotatablely installed by pin shaft.

It is additionally provided between upper door catch 14 and bracket 1 for moving up the application of upper door catch 14 with de- with lockhole 18 From resetting-mechanism, the upper half slot of bracket 1 constitutes the mounting groove 104 for installing resetting-mechanism, in the upper slot of mounting groove 104 Wall is provided with the long guiding hole 106 passed through for upper door catch 14 corresponding with mounting hole 103, and door catch 14 is T-shaped plate knot on this Structure, the upper end 141 of upper door catch 14 are provided with the pin shaft hole with 15 grafting of lever plate, and lower end 142 is for stretching to receiving In slot 102, resetting-mechanism includes the top pressure spring 11 of the vertically extending setting in mounting groove 104, and there are two divide for top pressure spring 11 The two sides of upper door catch 14 are not set, resetting-mechanism further includes the locating rod 13 extended up and down being arranged for top pressure spring 11, The lower end of locating rod 13 is fixed on the intermediate transverse slat of bracket 1, and the upper end sleeve integrating of two locating rods 13 is equipped with pressing plate 12, pressing plate Corresponding position be provided with locating rod mounting hole 122, the upper end of locating rod 13 stretches out in the location hole of the upper surface setting of bracket 1 105, offer the pressing plate long hole being inserted into for the T shape lower half of upper door catch 14 along the vertical direction in the middle position of pressing plate 12 121, the size of the pressing plate long hole 121 is less than 141 size of the upper half of the T shape of upper door catch 14.After Xiamen 8 is opened, Xiamen Structure is touched without power is touched, then upper door catch 14 pushes pressing plate 12 to move up under the action of top pressure spring 11, then pushes Upper door catch 14 moves up, the separation of door catch 14 and lockhole 18 in realization.

In the present embodiment, there are two brackets 1, is arranged at intervals on the two sides of mandril 5, corresponding lever mechanism also there are two, The lever plates 15 of two lever mechanisms cooperates with same 5 power transmission of mandril simultaneously, meanwhile, above-mentioned push rod 10 also there are two.

Plate 7 is hit for pushing to roll to lower swing when Xiamen 8 is closed being fixed on Xiamen 8, the section for hitting plate 7 is in U-shaped, the length of U-shaped two-arm can guarantee the rotation amplitude of connecting lever 4 when Xiamen 8 is closed.

Working principle: it when carrying out door-closing operation using the upper and lower door interlock 17, first closes and visits 9, push rod 10 pushes away Dynamic driving dog 2 moves backward, and the lockhole 18 on rear push-rod 10 is corresponding with mounting hole 103, and Xiamen 8 is not turned off at this time, on Then door catch 14 closes Xiamen 8 since the effect of top pressure spring 11 keeps up mobile trend, hit plate 7 and drive driving Idler wheel 6 is to lower swing, so that the other end of connecting lever 4 is swung up that mandril 5 is driven to move up, 5 activation lever plate of mandril 15 rotations, so that upper door catch 14 overcomes the active force of top pressure spring 11 and is downwardly into realizing locking in lockhole 18, It ensure that visit and 9 be locked；It is installed if being not turned off when visiting 9 and directly closing Xiamen 8 at this time since driving dog 2 is not removed Hole 103 is kept off, then the upper door catch 14 moved down under the effect of mandril 5 just can not continue to move after pressing to driving dog 2 Dynamic, so that connecting lever 4 can not continue to rotate, Xiamen 8 can not reach shutdown position, cause Xiamen 8 that can not close.

When carrying out opening door operation using the upper and lower door interlock 17, Xiamen 8 is first opened, mandril 5 is without upward at this time Driving force, under the Gravitative Loads of top pressure spring 11 and mandril 5, lever plate 15 is rotated backward, and then mandril 5 is driven to move down, on Door catch 14 moves up, and separates with lockhole 18, and interlock 17 unlocks at this time, can directly open and visit 9, and push rod 10, which removes, to be held It receives slot 102, while driving dog 2 returns to original position under the action of reset spring, realizes opening door operation；If in the case where being not switched on It is first opened before door 8 and visits 9, cooperated at this time due to upper door catch 14 with 18 locking of lockhole, visiting 9 is locked, at all can not be direct It opens.

Second embodiment of switchgear of the invention door interlock up and down, one embodiment other structures not In the case where change, bracket also can be made E shape as shown in figure 21, it is only necessary to guarantee the opening direction of holding tank towards push rod i.e. Can, or be directly formed together by folded be located at of two plates with the horizontally extending U-lag that is open.

The third embodiment of switchgear of the invention door interlock up and down, one embodiment other structures not In the case where change, bracket can be as shown in figure 22, and bracket is set as only having the U-shaped structure of holding tank, and resetting-mechanism is mounted directly In the upper end of bracket,.

4th embodiment of switchgear of the invention door interlock up and down, one embodiment other structures not In the case where change, it is not provided with connecting lever, the vertical guiding movement in support plate of mandril 5, and be arranged in the lower end of mandril 5 and extend up and down Grafting long hole, corresponding position setting and the mating inserted block of grafting long hole in Xiamen, the upper surface of inserted block be it is rear it is low before High domatic structure is constantly inserted into the grafting long hole of mandril in the closing process of Xiamen by inserted block, so that mandril is continuous It moves up, and then door catch is acted on pushing tow.

In other embodiments, it is hinged with connecting lever link mechanism can be set to input terminal, output end directly with upper door lock Hinged connection rod structure is sold, lock body is swung to the upside that connecting rod is arranged at this time, the interlocking of upper-lower door equally may be implemented.

In other embodiments, in the case where the other structures of one embodiment are constant, interlock is equally applicable In the cabinet body structure of left and right opening door；One bracket can be only set, and reset spring can directly be set in the T shape lower half of door catch Portion.

Claims (10)

1. The upper and lower door interlocking device of the switch cabinet is characterized in that: it comprises a lock body, and the lock body is provided with a lower door contact structure and an upper door lock pin, and a link mechanism is driven and connected between the lower door touch structure and the upper door lock pin. , the lock body is also provided with a transmission block on the transmission path between the lower door contact structure and the upper door lock pin, and the upper and lower door interlocking device also includes a push rod for setting on the upper door, so When the upper door is closed, the push rod can push the transmission block away to avoid the upper door lock pin. When the lower door is closed, there is a lock hole that locks the upper door in cooperation with the upper door lock pin to lock the upper door. The upper and lower door interlocking device further includes a lock pin reset mechanism arranged on the lock body to drive the upper door lock pin to disengage from the lock hole when the lower door is opened. 2 . The interlocking device for upper and lower doors of a switch cabinet according to claim 1 , wherein the lock body comprises a bracket, and the bracket is provided with an accommodating groove for placing the transmission stopper, and the groove wall of the accommodating groove is provided with an accommodating groove. A piercing hole is arranged on the upper door, and the upper door lock pin is pierced into the piercing hole and can reciprocate axially along the piercing hole in the accommodating groove. 3 . The interlocking device for upper and lower doors of a switch cabinet according to claim 2 , wherein the bracket is a plate-shaped structure in the shape of "he", the accommodating slot is formed by the lower half slot of the bracket, and the through-hole is 3. 4 . The mounting hole penetrates the lateral side of the bracket along the up-down direction, and the lock pin reset mechanism is arranged in the upper half groove of the accommodating groove. 4 . The interlocking device for upper and lower doors of a switch cabinet according to claim 3 , wherein the upper door lock pin is driven by a link mechanism to move downward and can extend into the accommodating slot, and the lock pin reset mechanism comprises: 5 . A return spring arranged in the upper half slot for exerting upward force on the upper door lock pin. 5 . The interlocking device for upper and lower doors of a switch cabinet according to claim 4 , wherein there are two return springs, which are arranged on both sides of the upper door lock pin. 6 . 6 . The interlocking device for upper and lower doors of a switch cabinet according to claim 3 , wherein the block return spring is set on top between the transmission block and the lower vertical wall of the bracket. 7 . 7 . The upper and lower door interlocking device of a switch cabinet according to claim 3 , wherein the link mechanism comprises a transmission lever arranged on the lock body, and the input end of the transmission lever touches the lower door. 8 . A transmission rod is connected between the structures, and the output end of the coupling transmission lever mechanism is in driving cooperation with the upper door lock pin. 8 . The interlocking device for upper and lower doors of a switch cabinet according to claim 7 , wherein there are two brackets, which are arranged side by side on both sides of the transmission rod, and there are two lever mechanisms. The rod is provided with a transmission pin shaft assembled with the input ends of the two lever mechanisms. 9 . The interlocking device for upper and lower doors of a switch cabinet according to claim 7 , wherein the lock body further comprises a support plate for connecting to the cabinet frame, and the support plate is provided with an edge for the transmission rod. 10 . Up and down direction guides through the perforations. 10 . The interlocking device for upper and lower doors of a switch cabinet according to claim 9 , wherein the lower door touching structure comprises a pivot arm that is rotated and is driven by the lower door and is arranged on the support plate. 10 . The part is a roller arranged on the input end of the crank arm.