CN110190548A - A switch cabinet with a front cable compartment door - Google Patents

Abstract

The invention relates to the technical field of medium-voltage switchgear, in particular to a switchgear with a front cable chamber door. The switch cabinet with the front cable room door includes a cabinet body, which is provided with a grounding switch and a grounding switch operating shaft, a crank arm is provided on the grounding switch operating shaft, and a fixed bracket is provided in the cabinet, and the fixed bracket is equipped with a locking device. There is a door interlock plate on the inner side of the front cable compartment door. The rotation of the operating shaft of the grounding switch drives the locking part to move back and forth through the crank arm and the connecting rod transmission mechanism. When the grounding switch completes the opening operation, the locking part cooperates with the door lock plate of the closed front cable chamber door, and the front cable The chamber door cannot be opened; when the grounding switch completes the closing operation, the locking piece and the door lock plate are unlocked, and the front cable chamber door can be opened at this time. This setting can effectively ensure that the front cable compartment door can only be opened when the grounding switch completes the closing operation, which improves the safety of the switch cabinet.

Description

A switch cabinet with a front cable compartment door

technical field

The invention relates to the technical field of medium-voltage switchgear, in particular to a switchgear with a front cable chamber door.

Background technique

Medium-voltage switchgear is an important equipment in the distribution network field. As shown in Figure 1, the electrical cabinet where it is located generally includes instrument room 1, busbar room 2, circuit breaker room 3, front and lower compartments 4 and rear cable room 5 , wherein, the front lower compartment 4 is an independent compartment, not a high-voltage live room, and the rear cable room 5 is a high-voltage live room for installing electrical components. With the continuous improvement of distribution network transportation requirements, the accuracy and function requirements of switchgear performance are increasing, the parameters of components in switchgear are becoming more and more accurate, the range of parameters is getting larger, and the performance coverage is wider. The appearance of the electrical components is too large, and the installation of the electrical components cannot be realized only by using the rear cable compartment 5. Therefore, more and more switchgears are designed to connect the front lower compartment 4 with the rear cable compartment 5 to form an integrated front cable compartment. As shown in Figure 2, the front cable chamber 6 formed by the connection between the front lower compartment and the rear cable chamber increases the space for the installation of electrical components and facilitates the installation of more electrical components.

While increasing the installation space, the front lower compartment also becomes a high-voltage live compartment. Since the front cable compartment 6 has a grounding switch and a grounding switch operating shaft arranged horizontally, the grounding switch can be separated by rotating the grounding switch operating shaft. In the switching of the closing state, when the grounding switch is in the opening state, the front cable room 6 is in a high-voltage charged state. In order to avoid accidents caused by maintenance personnel opening the front cable room door when the grounding switch is in the open state, there are It is necessary to design a switchgear with a simple structure that can only open the front cable room door when the grounding switch is in the closed state, so that the front cable room door cannot be opened when the grounding switch is in the open state, and maintenance personnel cannot enter. When it is in the closed state, the front cable room door can be opened for maintenance personnel to enter and work.

Contents of the invention

The object of the present invention is to provide a switch cabinet with a front cable room door which has a simple structure and can only be opened when the grounding switch is in the closed state.

In order to achieve the above object, the switchgear with the front cable compartment door of the present invention adopts the following technical solutions:

A switch cabinet with a front cable compartment door, comprising a cabinet body, in which a grounding switch and a grounding switch operating shaft extending along the horizontal direction are arranged, a cable room and a corresponding front cable room door are provided at the lower part of the cabinet body, the There is a crank arm on the operating shaft of the grounding switch, and a fixed bracket is provided in the cabinet. The fixed bracket is reciprocally movable in the horizontal plane and equipped with a locking piece. The crank arm corresponds to The locking part is driven to reciprocate through the connecting rod transmission mechanism. During its reciprocating movement, the locking part has an opening completion position and a closing completion position corresponding to the opening and closing operation of the grounding switch. The inside of the front cable chamber door is set There is a door interlocking plate extending in the horizontal direction, and the locking part is provided with a block and cooperation with the door interlocking plate when the locking part is in the opening completion position to prevent the front cable room door from opening. The locking part of the door interlocking plate is avoided when the component is in the closing completion position.

The beneficial effect of the above technical solution is: when the grounding switch operating shaft rotates to realize the opening and closing operation of the grounding switch, the grounding switch operating shaft drives the locking part to reciprocate through the crank arm and the connecting rod transmission mechanism at the same time, and when the grounding switch completes the opening and closing operation , the locking piece cooperates with the door lock plate of the closed front cable compartment door to prevent the opening of the front cable compartment door; when the grounding switch completes the closing operation, the locking piece and the door lock plate are unlocked, at this time The front cable compartment door can be opened. This setting can effectively ensure that the front cable compartment door can only be opened when the grounding switch completes the closing operation, which improves the safety of the switch cabinet.

Further, the reciprocating movement of the fixed bracket is equipped with a door anti-locking part, and the door anti-locking part has a function for blocking and cooperating with the locking part in the closing completion position on its reciprocating movement stroke, so as to block the operation shaft of the grounding switch from proceeding. The locking position for the opening operation and the unlocking position for avoiding the locking part. The door anti-locking part is connected with a reset elastic part that forces the door anti-locking part to move to the locking position. The door anti-locking part An unlocking stopper is provided on the door interlocking plate, and the unlocking pusher is provided on the door interlocking plate. Push fit to push the door anti-lock part to move to the unlocked position. The blocking of the locking part by the door anti-locking part prevents the operation shaft of the grounding switch from opening, which further ensures that the grounding switch is in the closed state and the front cable door is in the closed state. When the grounding switch is opened, the door anti-locking part is reset Under the action of the elastic part, it moves to the unlocking position, avoids opening the locking part, and does not affect the opening operation of the grounding switch.

Further, the unlocking pushing part is arranged on the corresponding end of the door interlocking plate away from the front cable compartment door. The unlocking and pushing part is set at the end far away from the front cable compartment door, so that the end of the door anti-lock close to the front cable compartment door can be designed to be shorter, which can effectively avoid interference with the structure on the front cable compartment door and ensure that the front cable The locking effect of the chamber door and the reliability of the whole device are better.

Further, the corresponding end of the door anti-locking part is provided with an elbow for push-fitting with the unlocking pushing part, and the elbow forms the unlocking stop part. The elbow structure is simple and easy to set up.

Further, the reciprocating movement direction of the locking member is defined as the front-to-back direction, the door interlocking plate is located on the front side of the fixed bracket, and the fixed bracket is provided with a front partition and a rear partition that form an installation interval, and the two partitions There are guide perforations on the top to guide the reciprocating movement of the locking member, and the two partition members are also provided with through holes for the locking part of the locking member to pass through. The door anti-locking member is arranged in the installation interval. The anti-lock part of the door is provided with an anti-lock stop part for blocking the through hole on the rear partition part when the anti-lock part of the door moves to the locking position. The arrangement of the two partitions facilitates the arrangement of the anti-locking parts of the door. At the same time, the guiding perforations of the two partitions guide the reciprocating movement of the locking part, making the reciprocating movement of the locking part of the locking part more stable and accurate.

Further, the door anti-lock part and the locking part are vertically arranged, and the door interlock plate is arranged in parallel with the door anti-lock part when the front cable compartment door is closed. This arrangement enables the locking member to lock the door anti-locking member and the door interlocking plate more directly, and the locking effect is more obvious.

Further, the guide perforations and the through holes on the two partitions are arranged staggered in the up and down direction, and the locking member has a guide plate that cooperates with the guide perforations on the two partitions, and is used to pass through A locking plate passing through the through hole, the locking plate serves as the locking portion, and the width of the locking plate in the up-down direction is greater than the width of the guide plate in the up-down direction. The width of the locking plate is relatively large, which is convenient for ensuring effective stop and fit, and the width of the guide plate is relatively small, so as to realize the design of weight reduction.

Further, the connecting rod transmission mechanism extends in the up and down direction, and the connecting rod transmission mechanism includes an intermediate transmission plate guided and assembled on the cabinet body in the up and down direction, the upper end of the intermediate transmission plate is hinged with an upper transmission connecting plate, The plate is hinged with the crank arm, the lower end of the middle transmission connecting plate is hinged with a lower driving connecting plate, and the lower end of the lower driving connecting plate is hinged with the locking member. The connecting rod transmission mechanism is concentrated in the up and down direction, which reduces the occupied space in the switch cabinet.

Further, a corner-drop protection plate is provided on the fixing bracket, and the corner-drop protection plate is used to support the door interlocking plate when the front cable compartment door is closed. The drop corner protection plate is used to support the door interlock plate, which can prevent the drop corner deformation of the front cable compartment door.

Further, a chamfer structure is provided on the lower part of the corresponding end of the door interlocking plate away from the front cable compartment door. The chamfer structure can prevent the door interlock plate from colliding with the corner protection plate and deformed.

Description of drawings

Fig. 1 is the schematic diagram of each chamber of traditional switchgear;

Fig. 2 is the schematic diagram of each chamber of prior art novel switchgear;

Fig. 3 is a specific structural schematic diagram of an embodiment of the switchgear of the present invention (the front cable compartment door is not shown);

Fig. 4 is a structural schematic diagram of the interlocking device between the grounding switch operating shaft and the front cable chamber door in Fig. 3;

Fig. 5 is a structural schematic diagram of another angle of Fig. 4;

Fig. 6 is a schematic diagram of the structure of the grounding switch operation shaft shown in Fig. 4 and the interlocking device of the front cable room door installed on the cabinet (closed state);

Fig. 7 is a schematic diagram of the door opening state corresponding to Fig. 6;

Fig. 8 is a schematic diagram of the structure of the grounding switch operating shaft and the interlocking device of the front cable compartment door shown in Fig. 4 when the front cable compartment door is closed (closed state);

Fig. 9 is a schematic diagram of the door opening state corresponding to Fig. 8;

Fig. 10 is a schematic structural view of the locking member in Fig. 4;

Fig. 11 is a structural schematic diagram of the door anti-lock part in Fig. 4;

Figure 12 is a schematic diagram of the structure of the fixed bracket in Figure 4 (the rear partition is not installed);

Figure 13 is a schematic diagram of the second structure of the fixed bracket in Figure 4 (the rear partition is not installed);

Fig. 14 is a schematic diagram of the state when the door anti-lock member in the interlock device described in Fig. 3 is in the locked position;

Figure 15 is a side view of Figure 14;

Figure 16 is a schematic diagram of the assembly of the door lock and tension spring in Figure 14 (door open state);

Fig. 17 is a schematic diagram of the state when the door anti-lock part and the tension spring are assembled in the switchgear of the present invention when they are in the unlocked position (closed state);

Fig. 18 is a structural schematic diagram of the door interlocking plate in Fig. 4;

Fig. 19 is a schematic structural view of the corner protection plate in Fig. 5;

Figure 20 is a schematic diagram of the assembly of the corner protection plate and the fixing bracket;

Explanation of reference signs: 1-instrument room, 2-busbar room, 3-circuit breaker room, 4-front and lower compartment, 5-rear cable room, 6-front cable room, 7-earth switch operating shaft, 8-turn Arm, 9-upper drive connecting plate, 10-middle drive plate, 11-lower drive connecting plate, 12-positioning guide plate, 13-cabinet side plate, 14-fixing bracket, 141-front vertical plate, 1411-guiding perforation , 1412-through hole, 1413-embedded groove, 142-rear partition, 143-rear vertical plate, 15-locking piece, 151-guide plate, 152-locking plate, 16-door anti-locking piece, 161- Elbow, 162-anti-lock stopper, 163-plate body, 17-tension spring, 18-door interlocking plate, 181-push end, 182-upper bump, 19-drop corner protection plate, 20-front cable chamber door.

Detailed ways

The embodiment of the present invention will be further described below in conjunction with the accompanying drawings (it should be noted that the front and rear directions defined in this embodiment are the reciprocating movement direction of the locking member, specifically, the extending direction of the locking member is the front, Retract direction is rear).

A specific embodiment of a switchgear with a front cable compartment door of the present invention:

As shown in Figure 3, the switch cabinet with the front cable room door includes a cabinet body, and the circuit breaker and grounding switch are arranged in the cabinet body, and the front cable room and the corresponding front cable room door are arranged at the lower part of the cabinet body. The front cable room exists as a high-voltage live compartment, so it is necessary to set up a corresponding interlock device between the grounding switch and the door of the front cable room to ensure safe operation. The interlocking device here is mainly arranged between the grounding switch operation shaft 7 and the front cable compartment door, and locks the front cable compartment door to prevent the front cable compartment door from being accidentally opened when the grounding switch operation shaft 7 drives the grounding switch to open and close. , when the front cable compartment door is opened, the grounding switch operating shaft is reversely locked to avoid the grounding switch opening operation, ensuring that only when the front cable compartment door is closed, the grounding switch operating shaft can drive the grounding switch for opening operation.

Specifically, as shown in Figures 4 to 9, an interlocking device is provided between the grounding switch operating shaft and the front cable compartment door. The interlocking device includes a crank arm 8, a connecting rod transmission mechanism, a locking member 15, a Lock plate 18 and door anti-lock piece 16. Wherein, the crank arm 8 is coaxially fixed on the grounding switch operating shaft 7, and the crank arm 8 is hinged to the corresponding end in the connecting rod transmission mechanism.

The connecting rod transmission mechanism here extends along the up and down direction, specifically including the middle transmission plate 10, the upper transmission connection plate 9 and the lower transmission connection plate 11, the middle transmission plate 10 extends along the up and down direction and is guided and assembled in the cabinet by the positioning guide plate 12 On the side plate 13 of the cabinet body, the positioning guide plate 12 is a U-shaped structure, the two side walls of the U-shaped structure are arranged along the up and down direction, two through holes are provided on the top wall, and the side plate 13 of the cabinet body is provided with the The threaded holes corresponding to the through holes are used to fix the positioning guide plate 12 on the cabinet side plate 13 by inserting bolts; the two side walls of the positioning guide plate 12 are provided with perforations for the middle transmission plate 10 to pass through in the up and down direction. The upper end of the middle transmission plate 10 is hinged with the upper transmission connecting plate 9, the upper end of the upper transmission connecting plate 9 is hinged with the crank arm 8, the lower end of the middle transmission plate 10 is hinged with the lower transmission connecting plate 11, and the lower end of the lower transmission connecting plate 11 is hinged with a lock The stopper 15, when the grounding switch operation shaft 7 performs the opening and closing operation, the crank arm 8 sequentially passes through the upper transmission connecting plate 9, the middle transmission connecting plate 10 and the lower driving connecting plate 11 to drive the locking member 15 to perform reciprocating action, thereby realizing For the locking and unlocking of the front cable compartment door, correspondingly, the locking member 15 has an opening completion position and a closing completion position corresponding to the opening and closing operation of the grounding switch during the reciprocating movement stroke. In addition, the entire connecting rod transmission mechanism is concentrated in the up and down direction, which reduces the occupied space in the switch cabinet.

As shown in Figures 4 to 9, the locking member 15 is reciprocally assembled on the fixed bracket 14, as shown in Figure 12 and Figure 13, the fixed bracket 14 includes a front vertical plate 141 and a rear vertical plate 143, and the rear vertical plate 143 There are two through holes on the top, and the side plate 13 of the cabinet body is provided with threaded holes corresponding to the through holes, and the fixing bracket 14 is fixed on the side plate 13 of the cabinet body through inserting bolts; the front vertical plate 141 forms a front partition The fixed bracket 14 has two side vertical plates arranged in parallel, and corresponding strip-shaped long grooves are arranged on the vertical plates on both sides from top to bottom. The partition members 142, each partition member is respectively provided with a guide through hole 1411 and a through hole 1412 along the up and down direction, and the guide through hole 1411 and the through hole 1412 on the two partition members correspond to each other respectively, and the arrangement is staggered up and down, and the guide through hole 1411 is located at over the via 1412 .

As shown in Figure 10, the locking member 15 includes a guide plate 151 and a locking plate 152, the guide plate 151 guides and fits with the guiding holes 1411 of the two partition members, and the locking plate 152 can pass through the through holes 1412 of the two partition members To be used for blocking cooperation with the door interlocking plate 18 . The reciprocating movement of the locking member 15 in the horizontal direction is guided through the guiding through holes 1411 of the two partition members, so that the reciprocating movement of the locking plate 152 as the locking part in the locking member 15 is more stable and accurate. In addition, the width of the locking plate 152 in the up and down direction is greater than that of the guide plate 151 in the up and down direction, which can effectively ensure the blocking reliability of the locking plate 152, and the guide plate 151 with a smaller width can reduce the Redesign.

While being able to guide the reciprocating movement of the locking member 15, the two partitions of the fixed bracket 14 form an interlayer, and the interlayer is provided with a door anti-lock 16 that can reciprocate along the left and right directions, and the door anti-lock 16 is also in the horizontal direction. Move, and the door anti-lock part 16 is vertically arranged with the locking part 15. As shown in FIG. Shown in 17, plate body 163 is fixed with the extension spring 17 that extends left and right direction near front cable compartment door 20 one end, and one end of extension spring 17 is connected with plate body 163, and the other end is fixed on the front cable compartment door 20 of fixed bracket 14- on the side riser. The door anti-locking part 16 has a locking position for blocking and cooperating with the locking part 15 in the closing completion position to block the opening operation of the grounding switch operation shaft 7 and a locking position for avoiding the locking part 15 on its reciprocating movement stroke. The above-mentioned tension spring 17 applies an elastic force to the door anti-lock member 16 forcing it to move to the locked position.

The front cable compartment door 20 is provided with a door interlock plate 18 extending in the horizontal direction. The door interlock plate 18 pushes and cooperates with the door anti-lock member 16 during reciprocating movement. The door anti-locks 16 are arranged in parallel. As shown in Figure 18, the end of the door interlocking plate 18 away from the front cable compartment door is a push end 181, which forms an unlocking push portion, and the door interlock plate 18 also includes an upper projection 182 that protrudes upward. . When the front cable compartment door of the switch cabinet is opened and the door anti-lock part 16 is in the locked position, the anti-lock stop part 162 of the door anti-lock part 16 blocks the through hole of the rear bulkhead part 142, and the locking part 15 cannot be locked from the two partitions. At this time, the grounding switch cannot perform the opening operation; when the front cable compartment door 20 of the switch cabinet is closed, the unlocking and pushing part of the door interlocking plate 18 pushes the elbow 161 of the door anti-locking part 16 Move towards the direction away from the front cable compartment door 20 (that is, the direction of the unlocking position). At this time, the anti-lock stopper 162 of the door anti-lock member 16 releases the shielding of the through hole on the rear partition member 142, and the locking member 15 is released from both sides. The through hole of the partition part passes through, and is blocked by the upper projection 182 of the door interlocking plate 18 by the locking plate 152. At this time, the front cable room door cannot be opened, and the grounding switch can be completed under the rotation of the grounding switch operating shaft 7. Opening operation. During the whole process, the elbow 161 forms an unlocking stopper, which is used to push and cooperate with the unlocking pushing part on the door interlocking plate 18, so that when the front cable compartment door 20 is closed, the door interlocks The plate 18 pushes the door anti-lock member 16 to move to the unlocking position, so as to realize the unlocking operation of the locking member 15 .

The front bottom of the fixed bracket 14 is also provided with a corner-off protection plate 19 arranged in the horizontal direction, as shown in Figure 12, Figure 13, Figure 19 and Figure 20, one side of the corner-off protection plate 19 forms a stepped structure, and the fixed bracket 14 Correspondingly, there is a horizontally extending embedding groove 1413, and the corner drop protection plate 19 is embedded in the embedding groove 1413 of the fixed bracket 14 through a step structure. When the front cable room door is closed, the corner drop protection plate 19 can be used to support the protection door. The interlocking plate 18 can prevent the deformation of the front cable compartment door from falling corners.

As shown in Figure 8 and Figure 9, the lower end of the push end 181 of the door interlock plate 18 is also provided with a chamfer structure, which is used to lift the door interlock plate when the door interlock plate 18 is in contact with the corner drop protection plate 19 18. It can prevent the door interlocking plate 18 from colliding with the corner protection plate 19 and deforming when the front cable compartment door is closed.

When the switchgear with the front cable chamber door of the present invention is in operation, when the grounding switch operating shaft 7 rotates to realize the opening and closing operation of the grounding switch, the grounding switch operating shaft 7 simultaneously drives the locking member 15 to reciprocate through the crank arm 8 and the connecting rod transmission mechanism. move.

Specifically, when the front cable compartment door 20 is in the closed state, the push end 181 of the door interlock plate 18 pushes the elbow 161 of the door anti-lock member 16 to move in a direction away from the front cable compartment door 20 (that is, in the direction of the unlocking position). , the anti-lock stopper 162 of the door anti-lock member 16 releases the shielding of the through hole on the rear bulkhead member 142. At this time, the grounding switch opening operation can be performed. When the grounding switch operating shaft 7 rotates counterclockwise, the crank arm 8 is pressed down The upper transmission connecting plate 9, the upper transmission connecting plate 9 then presses down the middle driving plate 10, the middle driving plate 10 goes down along the positioning guide plate 12 and presses down the driving connecting plate 11, and the lower driving connecting plate 11 presses down the locking member 15. The locking plate 152 passes through the through holes of the two partitions of the fixed bracket 14, and the locking piece 15 is not blocked to ensure the normal opening of the grounding switch. Moreover, the locking plate 152 of the locking piece 15 passes through the two The through hole of the partition part reaches the opening completion position, and the upper protrusion 182 of the door interlocking plate 18 stops and cooperates. At this time, the front cable room door 20 cannot be opened, and maintenance personnel cannot enter the front cable room door 20 to carry out maintenance work. Work, ensure safety.

When the front cable compartment door 20 is in the closed state, the operating shaft 7 of the grounding switch is driven to rotate clockwise to realize the corresponding closing operation. Specifically, turn the grounding switch operating shaft 7 clockwise, lift the crank arm 8, and drive the locking member 15 from the two partitions of the fixed bracket 14 through the upper transmission connecting plate 9, the middle transmission connecting plate 10 and the lower driving connecting plate 11 in turn. retracted to the closing completion position through the through hole of the part, and the blocking cooperation with the upper bump 182 is released immediately, and the pushing action of the door interlock plate 18 on the door anti-lock part 16 is also released immediately. At this time, the front cable room door is opened , the door anti-lock part 16 returns to its original position under the action of the elastic force of the tension spring 17, and the anti-lock stop part 162 of the door anti-lock part 16 blocks the via hole on the rear bulkhead part 142. At this time, the grounding switch is in the closing position. state and the opening operation cannot be performed, maintenance personnel can enter the front cable room to carry out work.

In this embodiment, the lower part of the corresponding end of the door interlocking plate away from the front cable compartment door is provided with a chamfered structure. In other embodiments, no chamfering structure may be provided.

In this embodiment, a corner-drop protection plate is provided on the fixing bracket, and the corner-drop protection plate is used to support the door interlocking plate when the front cable compartment door is closed. In other embodiments, no corner protection plate may be provided.

In this embodiment, the connecting rod transmission mechanism includes an intermediate transmission plate guided and assembled on the cabinet body in the up and down direction, an upper transmission connecting plate is hinged to the upper end of the intermediate transmission plate, and the upper transmission connecting plate is hinged to the crank arm. The lower end of the middle transmission connecting plate is hinged with a lower driving connecting plate, and the lower end of the lower driving connecting plate is hinged with the locking member. In other embodiments, the upper transmission connecting plate and the middle transmission plate may not be provided, that is, the crank arm is directly connected with the lower transmission plate. At this time, the length of the lower transmission plate is longer, and the crank arm is hinged with the lower transmission plate to directly drive the lower transmission plate. up and down.

In this embodiment, the locking member has a guide plate that cooperates with the guiding through holes on the two partition members, and a locking plate used to pass through the through hole, and the locking plate serves as the The locking part, the width of the locking plate is greater than the width of the guide plate. In other embodiments, the width of the locking plate may not be greater than the width of the guide plate. Of course, in other embodiments, no guide plate may be provided. Correspondingly, no guiding perforation for the guide plate to pass through is provided on the two partition members. .

In this embodiment, the door anti-locking part and the locking part are vertically arranged, and in other embodiments, the door anti-locking part may not be vertically arranged with the locking part, that is, the two may form a certain angle of inclination.

In this embodiment, the arrangement of the two partitions facilitates the arrangement of the anti-locking parts of the door. At the same time, the guide perforations of the two partitions guide the reciprocating movement of the locking part, making the reciprocating movement of the locking part of the locking part more stable and accurate. . In other embodiments, the rear bulkhead may not be provided, but at this time the reliability of the reciprocating movement of the locking member will be low.

In this embodiment, the blocking of the locking part by the door anti-locking part makes the operating shaft of the grounding switch unable to perform the opening operation, which further ensures that the grounding switch is in the closed state, and the front cable room door is in the closed state, and the grounding switch is opened. , the door anti-locking part moves to the unlocking position under the action of the reset elastic part, avoiding the opening of the locking part, and does not affect the opening operation of the grounding switch. In other embodiments, the door anti-locking part may not be provided. At this time, the interlocking device mainly plays a locking role after the front cable room door is closed, and no longer anti-locks the operating shaft of the grounding switch.

In this embodiment, both the door anti-locking part and the locking part reciprocate in the horizontal direction, and they are arranged vertically. At the same time, the door interlocking plate is arranged in parallel with the door anti-locking part when the front cable room door is closed, which not only facilitates door anti-locking The locking part is realized to stop the locking part, and it is also convenient for the locking part to stop the door interlocking plate. In other embodiments, the door anti-locking part can also move back and forth in the up and down direction, as long as the locking and unlocking of the locking part can be guaranteed. When the door interlocking plate pushes the door anti-lock piece upwards to avoid the locking piece, when the front cable room door is closed, under the action of the extension spring, the door anti-lock piece can be driven down to stop the locking piece. In addition, in this embodiment, the extension spring is used as the return elastic member, and in other embodiments, the return elastic member may also adopt a compression spring structure. If the locking part is on the corresponding cabinet body, the reset elastic part can also adopt a torsion spring structure.

In this embodiment, the unlocking pushing portion is arranged on the corresponding end of the door interlocking plate away from the front cable compartment door. In other embodiments, the unlocking pushing part can also be arranged on the corresponding end of the door interlocking plate close to the front cable compartment door. At this time, the end of the door anti-lock member close to the front cable compartment door needs to be designed longer. At this time, The door anti-lock may interfere with the structure on the front cable compartment door, and the reliability of the whole device will be reduced.

In this embodiment, the corresponding end of the anti-locking part of the door is provided with an elbow for push-fitting with the unlocking pushing part, and the elbow forms the unlocking stop part. In other embodiments, the corresponding end of the door anti-lock part can be provided with a perforation, and a connecting rod perpendicular to the door anti-lock part is installed in the through hole. Part of the realization of push fit.

Claims (10)

1. Earthing switch and horizontally extending is equipped with 1. a kind of switchgear with preceding cable chamber door, including cabinet body, in cabinet body Earthing switch operating shaft, cabinet body lower part be equipped with cable vault and corresponding preceding cable chamber door, it is characterised in that: the ground connection is opened It closes operating shaft and is equipped with connecting lever, fixed bracket, reciprocably mobile assembly in the horizontal plane on the fixation bracket are equipped in cabinet body There is lock piece, connecting lever correspondence when earthing switch operating shaft carries out divide-shut brake movement drives described by jointed gear unit Lock piece moves back and forth, and lock piece moves back and forth in stroke at it, and there is separating brake corresponding with earthing switch breaking-closing operating to complete Position and completion position of closing a floodgate, are equipped with horizontally extending couplet on the door jam plate, set on the lock piece on the inside of the preceding cable chamber door Have to be in cooperate when separating brake completes position with the couplet on the door jam plate block in lock piece and be opened, with cable chamber door before preventing in lock piece In the locking part for avoiding the couplet on the door jam plate when closing a floodgate and completing position.
2. 2. the switchgear according to claim 1 with preceding cable chamber door, it is characterised in that: can be past on the fixed bracket That moves again is equipped with a lockout member, door lockout member its move back and forth on stroke have for in the lock for completing position that closes a floodgate The cooperation of stop member block is to stop the locking position of earthing switch operating shaft progress sub-switching operation and the solution for avoiding the lock piece Lock-bit connects oriented door lockout member in the door lockout member and applies the return springs for forcing it dynamic to locking displacement, the door Lockout member is equipped with unlock stop section, and the couplet on the door jam plate is equipped with unlock pushing part, which is used for before described It is dynamic to unlock displacement with pushing tow door lockout member with the cooperation of the unlock stop section pushing tow of the door lockout member when cable chamber door is closed.
3. 3. the switchgear according to claim 2 with preceding cable chamber door, it is characterised in that: the unlock pushing part setting In the respective end far from preceding cable chamber door of the couplet on the door jam plate.
4. 4. the switchgear according to claim 3 with preceding cable chamber door, it is characterised in that: the door lockout member it is corresponding End is equipped with for the elbow with the unlock pushing part pushing tow cooperation, which forms the unlock stop section.
5. 5. according to the described in any item switchgears with preceding cable chamber door of claim 2 to 4, it is characterised in that: by lock piece Reciprocating movement direction definition is front-rear direction, and the couplet on the door jam plate is located on front side of fixed bracket, and fixed bracket, which is equipped with, forms peace The front baffle part and rear bulkhead part at dress interval, two spacer members are equipped with the guidance for guiding the lock piece to move back and forth and perforate, and two The via hole passed through for the locking part of the lock piece is additionally provided in spacer member, the door lockout member is arranged in installation interval, door Lockout member, which is equipped with, locks stop section for block via hole on rear bulkhead part when door lockout member is moved to locking position.
6. 6. the switchgear according to claim 5 with preceding cable chamber door, it is characterised in that: the door lockout member and described Lock piece is arranged vertically, and couplet on the door jam plate is arranged when preceding cable chamber door is closed with the door lockout member parallel.
7. 7. the switchgear according to claim 5 with preceding cable chamber door, it is characterised in that: draw described in two spacer members It leads perforation and the via hole is staggeredly arranged in the up-down direction, the lock piece has perforates with the guidance in two spacer member It is oriented to the guide plate of cooperation, and for the locking plate across the via hole, the locking plate is as the locking part, the locking The width of plate in the up-down direction is greater than the width of the guide plate in the up-down direction.
8. 8. the switchgear according to any one of claim 1 to 4 with preceding cable chamber door, it is characterised in that: the company Bar transmission mechanism vertically extends, and the jointed gear unit includes the centre that guiding assembles on the cabinet along the vertical direction Driver plate, the upper end of intermediate transmission plate are hinged with transmission connecting plate, and upper transmission connecting plate and the connecting lever are hinged, the intermediate transmission The lower end of connecting plate is hinged with underdrive connecting plate, and the lower end of underdrive connecting plate and the lock piece are hinged.
9. 9. the switchgear according to any one of claim 1 to 4 with preceding cable chamber door, it is characterised in that: described solid Arrisdefect protection board is provided on fixed rack, which is used to support the couplet on the door jam plate when preceding cable chamber door is closed.
10. 10. the switchgear according to claim 9 with preceding cable chamber door, it is characterised in that: the couplet on the door jam plate it is remote The lower part of respective end from the preceding cable chamber door is provided with chamfering structure.