CN110165596B

CN110165596B - Distribution switch equipment and aviation plug interlocking device thereof

Info

Publication number: CN110165596B
Application number: CN201910426893.9A
Authority: CN
Inventors: 何志华; 袁宏志; 余其贵; 李剑胜; 林明瑞; 叶志勇
Original assignee: Xiamen Huadian Switchgear Co Ltd
Current assignee: Xiamen Huadian Switchgear Co Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2024-02-20
Anticipated expiration: 2039-05-20
Also published as: CN110165596A

Abstract

An aviation plug interlocking device and power distribution switch equipment. The aviation plug interlocking device comprises a base, a crank arm, a sliding plate, a pulling rod and an interlocking plug board. The base comprises a first fixing plate and a second fixing plate, and the first fixing plate is provided with a clamping groove and a slot. The crank arm is fixed on the second fixed plate, the first end of the crank arm is provided with a roller, and the second end of the crank arm is tilted and inserted into the slot of the first fixed plate. The sliding plate is arranged on the first fixed plate and shields the clamping groove on the first fixed plate. The sliding plate is provided with a through groove for the tilted crank arm to penetrate. The interlocking picture peg is installed at the second fixed plate, and the outer end of interlocking picture peg is outstanding, blocks the door plant of distribution switchgear and closes. When the second end of the crank arm moves upwards, the sliding plate can be pulled, and when the clamping groove on the first fixed plate is exposed, the interlocking inserting plate is contracted inwards under the action of external force and is inserted into the clamping grooves of the first fixed plate and the sliding plate, and the door plate can be closed.

Description

Distribution switch equipment and aviation plug interlocking device thereof

Technical Field

The disclosure relates to the field of high-voltage switches, in particular to a power distribution switch device and an aviation plug interlocking device thereof.

Background

The distribution switch equipment is common distribution switch equipment, and the voltage of the distribution switch equipment can reach 3.6 kV-40.5 kV. Most of the current distribution switchgear is of an armored removable type, namely, a movable handcart is matched with a distribution switchgear body. The secondary components on the cart are connected to the internal electrical components of the distribution switchgear by means of an aerial plug. At present, the aviation plug on the handcart realizes the locking through the interlocking device of rocker formula, namely after the aviation plug of handcart inserts the aviation socket in the cabinet, the handcart removes to working position from test position, and at this moment, the pendulum rod of interlocking device blocks the handle of aviation plug just, makes the handle of aviation plug blocked by the pendulum rod and can't pull open, reaches the purpose that aviation plug can't be dialled to ensure the normal work of circuit breaker of handcart under the condition that secondary circuit switched on.

However, when the swing link type interlocking device cannot ensure that the circuit breaker works, the aviation plug and the aviation socket are matched in place, that is, the situation that the aviation plug is not accurately inserted into the aviation socket, namely, the situation that the secondary circuit is not connected, in this case, if the circuit breaker is powered on, the purpose of power transmission can be achieved because the secondary circuit is not conducted and cannot be switched on, and accident risks can be caused because the secondary circuit cannot be switched off.

Disclosure of Invention

In order to solve the problem that the aviation plug in the related art is not inserted into the aviation socket and possibly causes that the breaker cannot be switched on to achieve the purpose of power transmission or cannot be switched off to cause accidents, the disclosure provides power distribution switchgear and an aviation plug interlocking device thereof.

The present disclosure provides an aviation plug interlock, comprising:

the base is used for being fixed on the inner wall of a cabinet body of the power distribution switch equipment and comprises a first fixed plate and a second fixed plate connected with the first fixed plate, and the first fixed plate is provided with a clamping groove and a slot;

the first end of the crank arm far away from the first fixed plate is connected with a roller, the first end of the crank arm sinks under the action of gravity of the roller, and the second end of the crank arm is tilted;

the sliding plate is arranged on the first fixed plate, the sliding plate is provided with a through groove, the second end of the turning arm, which is tilted, is inserted into the slot of the first fixed plate through the through groove, and the sliding plate is provided with a clamping groove;

the pulling rod is connected with the sliding plate, and when the roller moves upwards under the action of external force, the second end of the crank arm moves downwards and leaves the through groove on the sliding plate, so that the pulling rod can pull the sliding plate to move;

the interlocking plugboard is installed on the second fixed plate, the interlocking plugboard can move relative to the second fixed plate, when the second end of the crank arm moves upwards, the sliding plate can be pulled, when the clamping groove on the first fixed plate is pulled to be exposed out of the sliding plate, the interlocking plugboard is contracted inwards under the action of external force to be inserted into the clamping groove of the first fixed plate and the clamping groove on the sliding plate, and when the clamping groove on the first fixed plate is not exposed out, the outer end of the interlocking plugboard protrudes out of the second fixed plate.

Optionally, the aviation plug interlocking device further comprises a door plate interlocking sliding plate installed on the second fixed plate, the door plate interlocking sliding plate is connected with the crank arm through a linkage plate, and the crank arm drives the door plate interlocking sliding plate to move through the linkage plate;

when the second end of the crank arm moves upwards, the door plate interlocking sliding plate is driven to move towards the direction close to the first fixed plate, the door plate interlocking sliding plate contracts inwards, and the door plate interlocking sliding plate is located in the range of the second fixed plate;

when the second end of the crank arm moves downwards, the linkage plate is driven to move in a direction away from the first fixed plate, and the end part of the door plate interlocking sliding plate protrudes out of the second fixed plate.

Optionally, the door plate interlock is installed on the second fixed plate through a fixed rod, the door plate interlock sliding plate is provided with a long groove, and the long groove is used for the fixed rod to penetrate and provide a movable space for the movement of the door plate interlock sliding plate;

the end part of the fixing rod is also provided with a circular ring card for blocking the door plate interlocking sliding plate from sliding out.

Optionally, the linkage plate is connected with the crank arm through the roller.

Optionally, a notch is formed below the through groove on the sliding plate, and the notch is used for avoiding the crank arm when the sliding plate moves. Optionally, the distance between the slot of the first fixing plate and the second fixing plate is smaller than the distance between the clamping groove and the second fixing plate.

Optionally, the aviation plug interlocking device further comprises an elastic piece connected with the interlocking plug board, a first end of the elastic piece is connected with the interlocking plug board, a second end of the elastic piece is connected to a fixing rod installed on the second fixing plate, and after the interlocking plug board is inserted into the clamping groove, the elastic piece keeps the state that the interlocking plug board is inserted into the clamping groove.

Optionally, a long notch is formed in the interlocking plugboard, the interlocking plugboard is fixed on the second fixing plate through a mounting column, one end of the mounting column is fixed on the second fixing plate, the other end of the mounting column penetrates through the long notch, and the long notch provides a movable space for the interlocking plugboard to move relative to the mounting column;

the end part of the mounting column is also provided with a circular ring card for blocking the interlocking plugboard from sliding out.

Optionally, the aviation plug interlocking device further comprises an elastic stretching piece arranged on the back surface of the first fixing plate, one end of the elastic stretching piece is connected with the first end of the crank arm, and the other end of the elastic stretching piece is connected to the fixing piece above the crank arm.

Optionally, an aviation buckle plate is further arranged on one side, opposite to the second fixed plate, of the sliding plate.

Optionally, a lifting lug is fixed on the sliding plate, one end of the pulling rod is fixed on the lifting lug, the other end of the pulling rod penetrates through the second fixing plate and stretches out, a pressure spring is sleeved on the pulling rod, and the pressure spring is compressed between the lifting lug and the second fixing plate.

The present disclosure further provides an aviation plug interlock, comprising:

the base is used for being fixed on the inner wall of a cabinet body of the power distribution switch equipment and comprises a first fixed plate and a second fixed plate connected with the first fixed plate, and the first fixed plate is provided with a slot;

the first end, far away from the first fixed plate, of the crank arm is connected with a roller, the first end of the crank arm sinks under the action of gravity of the roller, the second end of the crank arm is tilted, and the second end of the crank arm is inserted into a clamping groove of the first fixed plate;

the door plant interlocking slide is installed on the second fixed plate, through the linkage board with the turning arm is connected, the turning arm passes through the linkage board drives the door plant interlocking slide removes when the second end of turning arm moves up, drive the door plant interlocking slide is to being close to the direction of first fixed plate removes, the door plant interlocking slide is retracted, the door plant interlocking slide is located in the second fixed plate, when the second end of turning arm moves down, drive the linkage board is to keeping away from the direction of first fixed plate removes, the tip of door plant interlocking slide is outstanding the second fixed plate.

The utility model provides a distribution switchgear still provides, including the cabinet body, handcart and foretell aviation is inserted interlock, aviation is inserted interlock and is installed on the inner wall of the cabinet body, and is close to the door plant of the cabinet body, the handcart can for the cabinet body removes.

Optionally, the handcart has an interlocking oblique bending plate, when the handcart pushes into the cabinet body, the interlocking oblique bending plate contacts with the idler wheel of the aviation plug interlocking device to push the idler wheel to move upwards.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

the present disclosure provides an aviation plug interlock that includes a base, a lever, a slide plate, a pull rod, and an interlock insert plate. The base comprises a first fixing plate and a second fixing plate, and the first fixing plate is provided with a clamping groove and a slot. The turning arm is fixed on the second fixed plate, the first end of the turning arm is provided with a roller, the first end of the turning arm sinks under the action of the roller, and the second end of the turning arm is tilted and inserted into the slot of the first fixed plate. The sliding plate is arranged on the first fixed plate and can shield the clamping groove on the first fixed plate. The sliding plate is provided with a through groove for the tilted crank arm to penetrate. The interlocking picture peg is installed at the second fixed plate, and when the draw-in groove on first fixed plate did not expose, the outer end of interlocking picture peg outstanding second fixed plate, stops the door plant of distribution switchgear to close. When the idler wheel of the crank arm moves upwards, the crank arm does not block the sliding plate to move any more, the sliding plate can be moved rightwards by pulling the pulling rod, so that the aviation plug is inserted into the aviation socket, meanwhile, the clamping groove on the first fixed plate is exposed, the interlocking inserting plate is retracted and is inserted into the clamping groove of the first fixed plate and the clamping groove on the sliding plate, and at the moment, the door plate of the power distribution switch equipment can be closed. Therefore, after the sliding plate moves rightwards, the aeronautical plug on the handcart can be inserted into the aeronautical socket, and the door plate can be closed. That is, after the aviation plug is inserted into the aviation socket, the door plate can be closed, if the door plate cannot be closed, the door plate cannot be shaken into the handcart to the working position, that is, the condition that the secondary circuit is not connected is avoided, the connection of the primary circuit is continued, and further the condition that the risk of accidents caused by the fact that the circuit breaker cannot be closed to achieve the power supply purpose or cannot be opened due to the fact that the secondary circuit is not conducted is avoided, and the personal safety of staff is ensured.

The present disclosure further provides an aviation plug linkage device comprising a base, a crank arm, and a door plate interlocking slide plate. The base comprises a first fixed plate and a second fixed plate, and the first fixed plate is provided with a slot. The crank arm is installed on the second fixed plate, the first end of the crank arm is connected with a roller, the first end of the crank arm sinks under the action of gravity of the roller, and the second end of the crank arm is tilted and inserted into a clamping groove of the first fixed plate. The door plate interlocking slide plate is arranged on the second fixed plate and connected with the crank arm through the linkage plate, and the crank arm drives the door plate interlocking slide plate to move through the linkage plate. When the second end of the crank arm moves upwards, the door plate interlocking sliding plate is driven to move towards the direction close to the first fixed plate, the door plate interlocking sliding plate contracts inwards, the door plate interlocking sliding plate is located in the second fixed plate, and the door plate of the power distribution switch device can be closed. When the second end of the crank arm moves downwards, the linkage plate is driven to move in a direction away from the first fixed plate, and the end part of the door plate interlocking sliding plate protrudes out of the second fixed plate to block the door plate from being closed. Therefore, when the cart is not pushed into the cabinet, the door plate interlocking slide plate extends out, and the door plate cannot be closed because the door plate interlocking slide plate is blocked, that is, the door plate cannot be closed when the cart is not pushed into the cabinet. When the handcart pushes into the cabinet body and enters the test position, the idler wheels move upwards, the linkage plates connected with the idler wheels enable the door plate interlocking sliding plates to retract into the cabinet, and at the moment, the door plates can be closed by sliding downwards, namely, after the handcart is assembled with the cabinet, the door plates can be closed. When the handcart is rocked into the working position from the test position, the roller automatically resets, the door plate interlocking slide plate also restores to the original position, the door plate is blocked by the outer end of the door plate interlocking slide plate and cannot be lifted upwards at the moment, namely, the door plate cannot be opened at the moment, and the circuit breaker is ensured to be operated in a door closing state, so that the personal safety is ensured.

The present disclosure further provides a power distribution switchgear including a cabinet, a cart, and the aviation plug interlock described above. This distribution switchgear inserts interlock because of adopting the aviation, guarantees that the handcart just can get into working position after aviation plug inserts aviation socket, and then has avoided the secondary circuit to have not switched on and has led to the fact the circuit breaker can't be closed a floodgate to reach the condition of the risk of sending electric purpose or unable separating brake and causing the accident, has guaranteed staff's personal safety.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a power distribution switchgear in an exemplary embodiment according to the present disclosure.

Fig. 2 is a schematic perspective view of an aerial plug interlock when a circuit breaker of a cart is in an operational position in accordance with the present disclosure in an exemplary embodiment.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a front view of fig. 2.

Fig. 5 is a simplified schematic diagram of fig. 2 with the interlocking insert plate omitted for clarity of illustration of the lever structure.

Fig. 6 is a schematic perspective view of an aerial plug interlock when a circuit breaker of a cart enters a test position and a door panel is not closed in an exemplary embodiment according to the present disclosure.

Fig. 7 is a left side view of fig. 6.

Fig. 8 is a front view of fig. 6.

Fig. 9 is a left side view of fig. 5.

Detailed Description

For further explanation of the principles and structures of the present disclosure, preferred embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the present disclosure provides a power distribution switchgear 100, the power distribution switchgear 100 including an aerial plug interlock 10, a cabinet 20, and a cart 30. A plurality of electrical components for implementing the switch cabinet function are provided in the cabinet body 20. The aviation plug interlock 10 is mounted on the inner wall of the cabinet 20, near the door panel 21 of the cabinet 20. The cart 30 is movable as a whole relative to the cabinet 20 and is retractable from the cabinet 20. The cart 30 has mounted thereon an aerial plug and a circuit breaker. When the handcart 30 moves to the test position of the cabinet body 20, the aviation plug on the handcart 30 can be connected with the aviation socket in the cabinet body 20, so that the secondary circuit is ensured to be conducted. When the handcart 30 moves from the test position to the working position, the primary circuit is conducted, all components in the cabinet body 20 are in a working state, and the circuit breaker is in a switching-on state.

The terms mentioned in this disclosure are explained as follows:

the primary circuit is an electric circuit formed by connecting primary equipment to each other to generate electricity, transform electricity, transmit electricity, distribute electricity or perform other production.

The secondary circuit means: the secondary devices are connected with each other to form an electric loop for monitoring, controlling, regulating and protecting the primary devices.

The primary device means: high-voltage electrical equipment that directly produces, delivers, and distributes electrical energy, such as generators, transformers, circuit breakers, disconnectors, reclosers, contactors, knife switches, bus bars, transmission lines, power cables, reactors, motors, and the like.

The secondary device refers to: the operation of the primary equipment is monitored, controlled, regulated, protected, and low voltage electrical equipment, such as fuses, control switches, relays, control cables, etc., required to provide operating conditions or production command signals for operating and maintenance personnel.

The test positions refer to: the aviation plug is plugged in, the secondary circuit is conducted, and the circuit breaker of the handcart is in a brake-separating state.

The working position is as follows: the aviation plug is inserted, the secondary circuit and the primary circuit are both conducted, and the circuit breaker of the handcart is in a brake-separating state.

The present disclosure provides an aviation plug interlock 10 to achieve an interlock between a cart 30 and a cabinet 20. Specifically, as shown in connection with fig. 2 to 4, the aviation plug interlock 10 includes a base 11, a lever 12, a slide plate 13, a pull rod 14, and an interlock insert plate 15.

The base 11 may be fixed to an inner wall of a cabinet of the distribution switchgear 100. The base 11 includes a first fixing plate 111 and a second fixing plate 112 connected to the first fixing plate 111. An included angle is formed between the first fixing plate 111 and the second fixing plate 112, and the included angle may be 90 degrees, that is, the first fixing plate 111 and the second fixing plate 112 are vertically connected. In this way, the first fixing plate 111 and the second fixing plate 112 can be adapted to the shape of the inner wall of the cabinet 20, so that the base 11 can be firmly fixed on the inner wall of the cabinet 20.

Further, in order to reduce interference between the bent portion of the base 11 and the inner wall of the cabinet 20, an arc chamfer 113 is provided at the junction of the first fixing plate 111 and the second fixing plate 112.

Further, a slot 1111 is formed at the bottom of the first fixing plate 111 and near the arc chamfer 113, and the slot 1111 is penetrated by the end of the lever 12.

Further, the first fixing plate 111 is provided with a clamping groove 1112 above the slot 1111, and the distance from the clamping groove 1112 to the second fixing plate 112 is longer than the distance from the slot 1111 to the second fixing plate 112. Thus, when the lever 12 is tilted in the slot 1111, the lever 12 blocks the sliding plate 13 from moving rightward, and the sliding plate 13 can shield the clamping groove 1112. The clamping groove 1112 is used for the interlocking insert 15 to penetrate.

The first fixing plate 111 and the second fixing plate 112 may be integrally formed or welded.

It will be appreciated that the angle formed between the first fixing plate 111 and the second fixing plate 112 may vary depending on the shape of the inner wall of the cabinet 20 to be fixed.

The crank arm 12 is mounted on the second fixing plate 112 through a mounting shaft 121. The lever 12 includes a first end 12a and a second end 12b. The first end 12a is inserted into the slot 1111 of the first fixing plate 111, and the first end 12a is penetrated out of the first fixing plate 111. The second end 12b has a roller 122 attached thereto. The roller 122 may be a nylon roller. As shown in connection with fig. 5, the roller 122 is connected to the crank arm 12 by a connecting piece 123. The connecting member 123 is in contact with the second fixing plate 112 but is not fixed so that the second end 12b of the lever 12 can swing with respect to the mounting shaft 121. When the roller 122 is free from external force, the second end 12b of the crank arm 12 sinks relative to the mounting shaft 121 and the first end 12a tilts relative to the mounting shaft 121 under the action of gravity of the roller 122. When the roller 122 is lifted by an external force, the second end 12b of the crank arm 12 moves upward, and the first end 12a moves downward, so that the crank arm 12 is flat, and the second end 12b and the first end 12a are in the same straight line.

The mounting shaft 121 is mounted at two thirds of the crank arm 12, and the second end 12b and the first end 12a are swingable with respect to the mounting shaft 121. The installation shaft 121 protrudes from the front surface of the second fixing plate 112, and the crank arm 12 is installed at the end of the protruding portion of the installation shaft 121, so that a certain distance is kept between the crank arm 12 and the second fixing plate 112, and the first end 12a of the crank arm 12 can be inserted into the clamping groove 1111 having a certain distance from the arc chamfer 113.

Further, as shown in fig. 3, an elastic stretching member 124 is further provided on the back surface of the first fixing plate 111. The elastic tension member 124 may be a tension spring. One end of the elastic stretching member 124 is connected to the first end 12a of the lever 12, and the other end is connected to the fixing member 125 above the lever 12. In this way, when no external force is applied to jack up the second end 12b of the lever 12, the first end 12a of the lever 12 is guaranteed to be tilted, and the sliding plate 13 is guaranteed to cover the clamping groove 1112 on the first fixing plate 111, so that the end of the interlocking plug plate 15 cannot be inserted into the clamping groove 1112, and the other end of the interlocking plug plate protrudes out of the second fixing plate 112, thereby blocking the closing of the door plate 21 of the cabinet 20. In fig. 3, only one end of the elastic tension member 124 is shown connected to the fixing member 125 due to the view angle of the cross section, and the other end of the elastic tension member 124 is not shown connected to the first end 12a of the crank arm 12.

Further, as shown in fig. 5, in addition to the roller 122 connected to the second end 12b of the lever 12, another roller 122 is further provided, so that the lever 12 has better balance performance. The other roller 122 is located on the left side of the mounting shaft 121 (herein, the left and right directions are referred to in fig. 3), and the rollers 122 at the second end 12b are symmetrically distributed with respect to the mounting shaft 121. The other roller 122 is also connected to the lever 12 by a connection 123. The other roller 122 is in contact with the second fixing plate 112 but is not fixed.

Referring back to fig. 2 and 4, the sliding plate 13 is mounted on the first fixing plate 111. The slide plate 13 is provided with a long groove 13a. One end of the fixing member 131 is fixed to the first fixing plate 111, the other end penetrates through the long groove 13a, and an end of the fixing member 131 is provided with a circular ring card 132 for preventing the sliding plate 13 from sliding out.

As shown in fig. 5, the sliding plate 13 is provided with a through groove 133a and a notch 133b at a position corresponding to the slot 1111 of the first fixing plate 111, the through groove 133a is located at an edge, and the notch 133b is located below the through groove 133 a. The through groove 133a has a sidewall, and when the first end 12a of the lever 12 is tilted, the sidewall 133a of the through groove 133a blocks the sliding plate 13 from moving rightward. The notch 133b is used to avoid the lever 12 when the slide plate 13 moves. After the first end 12a of the lever 12 moves down, it avoids the sidewall of the through slot 133a and moves into the notch 133b, and the lever 12 does not interfere with the sliding plate 13 due to the large space of the notch 133b, so that the sliding plate 13 can move rightward.

The sliding plate 13 is provided with a clamping groove 134 at a position corresponding to the clamping groove 1112 of the first fixing plate 111. After the sliding plate 13 moves rightward, the clamping groove 134 on the sliding plate 13 can be aligned with the clamping groove 1112 on the first fixing plate 111, so that the interlocking board 15 can be inserted. The distance between the clamping groove 1111 of the first fixing plate 111 and the second fixing plate 112 is smaller than the distance between the clamping groove 1112 and the second fixing plate 112, so that the clamping groove 1112 is exposed for inserting the interlocking board 15 after the sliding plate 13 moves rightward.

Further, the side of the sliding plate 13 opposite to the second fixing plate 112 is also provided with an aviation buckle plate 135. The aviation plug board 135 has a substantially U-shaped structure, and is used for being buckled with an aviation plug on the handcart 30, and when the sliding board 13 moves rightwards, the aviation plug is driven to move rightwards so as to be inserted into an aviation socket inside the cabinet body.

A lifting lug 141 is fixed to the slide plate 13. One end of the pulling rod 14 is fixed on the lifting lug 141, and the other end extends out through the second fixing plate 112, and the extending part can be pulled by a worker. The pulling rod 14 is provided with a compression spring 142, which compression spring 142 is compressed between the lifting lug 141 and the second fixing plate 112, i.e. the compression spring 142 extends from the lifting lug 141 all the way to the second fixing plate 112, in fig. 5 only part of the compression spring is shown and not all.

After the crank arm 12 moves down, the pulling rod 14 is pulled to manually pull the slide plate 13 to move rightward.

Further, as shown in fig. 2 and 3, the interlocking insert plate 15 is mounted on the second fixing plate 112 through a mounting post 151. The interlocking insert 15 is provided with a long slot 152, and the long slot 152 provides enough movement space for the movement of the interlocking insert 15. The slot 152 may be an oblong slot. One end of the mounting post 151 is fixed to the second fixing plate 112, and the other end penetrates through the long slot 152, so that the interlock board 15 is mounted on the mounting post 151. The end of the mounting post 151 is provided with a circular ring card 153 that prevents the interlock insert plate 15 from slipping out.

The interlocking insert plate 15 has a substantially zigzag shape extending in a longitudinal direction of the second fixing plate 112, i.e., extending perpendicular to the first fixing plate 111. When the clamping groove 1112 of the first fixing plate 111 is not exposed, the outer end 15a of the interlocking board 15 protrudes beyond the edge of the second fixing plate 112 to prevent the door 21 of the cabinet 20 from closing

The interlocking insert 15 is further connected to a resilient member 154, and the first end of the resilient member 154 is connected to the interlocking insert 15 and the second end is connected to a fixing rod 162 mounted on the second fixing plate 112. The fixing lever 162 may also be used to mount the door lock interlock slide 16 to be mentioned later.

The interlocking insert plate 15 is movable relative to the second fixing plate 112. In the case that the clamping groove 1112 of the first fixing plate 111 is not exposed, the sliding plate 13 blocks the movement of the interlocking insert plate 15 in the direction of the first fixing plate 111, so that the outer end 15a of the interlocking insert plate 15 protrudes beyond the edge of the second fixing plate 112 to prevent the door panel 21 of the cabinet 20 from being closed. When the slide plate 13 moves rightward to expose the locking groove 1112 on the first fixing plate 111, the interlock board 15 moves (retracts) in the direction of the first fixing plate 111 when an external force is applied (for example, the door panel 21 is pressed), the inner end 15b of the interlock board 15 is inserted into the locking groove 1112 on the first fixing plate 111, and the outer end 15a is retracted into the second fixing plate 112, and at this time, the door panel 21 is closed. When the handcart leaves the test position and enters the working position, the roller 122 returns to the original position (i.e. the roller 122 is in a sinking state), and the interlocking plug board 15 is kept in the original state under the tension of the elastic member 154 and is still inserted into the clamping groove 1112 of the sliding board 13, so that the sliding board 13 cannot be stirred, i.e. the aviation plug cannot be removed.

Referring to fig. 6 to 8, when the cart 30 is in the testing position (when the door is not closed), the interlocking ramp on the cart 30 pushes the roller 122 of the aerial lift interlock 10 to move upward, the first end 12a of the lever 12 moves downward, and the lever 12 is in a flat state. At this time, the sliding plate 13 is shifted rightward, so that the aviation plug on the handcart 30 is buckled on the aviation socket. At this time, the clamping groove 1112 of the first fixing plate 111 covered by the sliding plate 13 is exposed and aligned with the clamping groove 134 on the sliding plate 13, so that a space is left for the movement of the interlocking insert plate 15 to the first fixing plate 111.

When the clamping groove 1112 of the first fixing plate 111 is exposed, the door plate 21 of the cabinet body can be closed, as shown in fig. 2 to 4, the door plate 21 pushes the interlocking insert plate 15 to move inwards, so that the inner end 15b of the interlocking insert plate 15 is inserted into the clamping groove 134 and the clamping groove 1112, and the interlocking insert plate 15 is located in the range of the second fixing plate 112. If the aviation plug is not buckled on the aviation socket at this time, the clamping groove 1112 of the first fixing plate 111 is not exposed, the interlocking plugboard 15 cannot move inwards, the outer end 15a of the interlocking plugboard protrudes out of the edge of the second fixing plate 112, the blocking door plate 21 is closed, and the handcart 30 cannot be continuously operated, so that the handcart 30 can be continuously rocked on the premise that the aviation plug is inserted into the aviation socket, and further the misoperation of the circuit breaker caused by incorrect opening or closing is prevented, namely the situation that the circuit breaker cannot be closed to achieve the power supply purpose or the accident risk caused by the opening due to the fact that the secondary circuit is not conducted is avoided.

In addition, when the hand truck moves from the test position to the working position, the roller 122 returns to the original position, but the interlocking insert plate 15 can be kept in the original state under the action of the elastic member 154, that is, still inserted into the clamping groove of the sliding plate 13. So, can't stir the sliding plate 13, can't pull out the aviation plug promptly, guarantee that the aviation plug can not be pulled out in the handcart in the course of the work to the components and parts in the protection cabinet body and the handcart, more importantly, guaranteed staff's personal safety.

Further, as shown in connection with fig. 5 and 9, the lever 12 is connected to the door plate interlocking slide plate 16 through the interlocking plate 17. Specifically, the link plate 17 includes a transverse portion and a vertical portion perpendicular to each other, which form a T-shape. The transverse part of the linkage plate 17 is directly connected with the two rollers 122, and the end part of the vertical part is connected with the door plate interlocking slide plate 16.

The linkage plate 17 has a U-shaped groove at one end connected to the door plate interlocking slide plate 16, and a linkage shaft 161 is provided in the U-shaped groove, and the linkage shaft 161 is connected to the door plate interlocking slide plate 16 so that the linkage shaft 161 can move in the U-shaped groove when the door plate interlocking slide plate 16 moves left and right.

The door interlocking slide plate 16 is approximately in a zigzag shape, and two ends of the door interlocking slide plate are respectively provided with a long groove 16a, and the long groove 16a can be in an elliptical shape. One end of the fixing rod 162 is fixed to the second fixing plate 112, and the other end penetrates through the long groove 16a of the door plate interlocking slide plate 16, so that the door plate interlocking slide plate 16 is mounted on the second fixing plate 112. The end of the fixing rod 162 that passes through is provided with a circular card 163 for blocking the door panel interlocking slide 16 from sliding out. The door plate interlocking slide plate 16 can move left and right along with the movement of the crank arm 12 under the action of the interlocking plate 17, and the long groove 16a provides enough movement space for the door plate interlocking slide plate 16 to move.

When the roller 122 is jacked up and moved upwards, the linkage plate 17 is driven to move towards the direction close to the first fixed plate 111 (namely, the direction far away from the door plate of the power distribution switch equipment), the door plate interlocking sliding plate 16 is retracted, and at the moment, the door plate 21 of the cabinet 20 can be closed; when the external force acting on the roller 122 is removed, the second end 12b of the crank arm 12 moves downward, driving the linkage plate to move away from the first fixing plate 111 (i.e., toward the door plate of the cabinet), and the end of the door plate interlocking slide plate 16 protrudes beyond the edge of the second fixing plate 112, preventing the door plate 21 from opening or closing.

Specifically, when the circuit breaker of the handcart 30 starts to swing from the test position to the working position, as shown in fig. 2 to 4, the roller 122 is restored to the original position, that is, the roller 122 is sunk, the door plate interlocking slide plate 16 is extended outwards under the action of the linkage plate 17, at this time, the door plate 21 is blocked by the door plate interlocking slide plate 16, that is, cannot be lifted to be opened, and the error entering into the electrified interval is prevented, that is, the door plate is opened to cause the electric shock risk when the circuit breaker of the handcart works. Thus, the door plate interlocking slide plate 16 can ensure personal safety and realize the interlocking of the aviation plug interlocking device and the door plate.

In addition, in another embodiment, the aviation plug interlock device 10 may not include the interlock board 15, and in this case, the aviation plug interlock device 10 may also implement the interlock with the circuit breaker of the handcart. In this embodiment, the aircraft insert interlock includes a base, lever and door panel interlock slide that is identical in construction to the base 11, lever 12 and door panel interlock slide 16 of the previous embodiment and will not be described in detail. In this embodiment, when the cart 30 has not been pushed into the cabinet, the door panel interlock slide 16 is extended and the door panel 21 cannot be closed because the door panel interlock slide 16 is blocked. When the circuit breaker is pushed into the cabinet and is in the test position, the interlocking oblique bending plate at the upper right part of the circuit breaker is contacted with the roller 122 of the aviation plug interlocking device 10, so that the roller 122 moves upwards, the door plate interlocking sliding plate 16 is retracted into the cabinet by the linkage plate 17 connected with the roller 122, and the door plate 21 can be closed by sliding downwards. That is, the door panel can be closed after the circuit breaker is assembled. When the circuit breaker is rocked into the working position from the test position, the inclined bending plate on the circuit breaker is separated from the roller, and the roller is automatically reset, so that the door plate interlocking sliding plate 16 is also restored to the original position, the door plate cannot be lifted upwards at the moment, that is, the door plate cannot be opened at the moment, the circuit breaker is ensured to be operated in the door closing state, and the personal safety is ensured.

In conclusion, the aviation plug interlocking device realizes the interlocking among the handcart, the aviation plug interlocking device and the door plate, and on-site maintenance personnel can operate the circuit breaker of the handcart strictly according to related operation flows, so that the personal installation and electricity utilization safety of the maintenance personnel are ensured.

Specifically, when the circuit breaker of the handcart is at a test position, the roller moves upwards, at the moment, the aviation plug board moves rightwards, the aviation plug is inserted into the socket and buckled, the door plate can be closed, and the circuit breaker can be operated; the circuit breaker leaves the test position, and the aviation plug cannot be pulled out, so that the reliability of a secondary circuit is ensured; when the circuit breaker leaves the test position, the door plate interlocking sliding plate extends outwards, so that the door plate is prevented from being lifted to be opened, door closing interlocking is realized, and personal safety is ensured.

The foregoing is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure, but all equivalent structural changes made using the description and drawings of the present disclosure are included in the scope of the present disclosure.

Claims

1. An aerial plug interlock, comprising:

2. The aerial plug interlock of claim 1 further comprising a door panel interlock slide mounted on the second fixed plate, the door panel interlock slide being connected to the crank arm by a linkage plate, the crank arm driving the door panel interlock slide to move by the linkage plate;

3. The aviation plug interlocking device according to claim 2, wherein the door plate interlocking slide plate is mounted on the second fixed plate through a fixed rod, the door plate interlocking slide plate is provided with a long groove, and the long groove is used for the fixed rod to penetrate and provide a movable space for the movement of the door plate interlocking slide plate;

4. The aerial plug interlock of claim 2 wherein the linkage plate is connected to the crank arm by the roller.

5. The aerial plug interlock of claim 1 wherein the slide plate defines a notch below the through slot for avoiding the crank arm when the slide plate moves.

6. The aerial plug interlock of claim 1 wherein the slot of the first securing plate is a distance from the second securing plate that is less than the distance of the slot from the second securing plate.

7. The aerial plug interlock of claim 1 further comprising an elastic member coupled to the interlock plug, a first end of the elastic member coupled to the interlock plug, a second end of the elastic member coupled to a fixing rod mounted to the second fixing plate, and the elastic member maintaining a state in which the interlock plug is inserted into the card slot after the interlock plug is inserted into the card slot.

8. The aviation plug interlocking device according to claim 7, wherein a long notch is formed in the interlocking plug board, the interlocking plug board is fixed on the second fixing plate through a mounting column, one end of the mounting column is fixed on the second fixing plate, the other end of the mounting column penetrates through the long notch, and the long notch provides a movable space for the interlocking plug board to move relative to the mounting column;

9. The aerial plug interlock of claim 1 further comprising an elastic tension member mounted to the back of the first plate, one end of the elastic tension member being connected to the first end of the lever and the other end being connected to a mount above the lever.

10. The aerial plug interlock of claim 1 wherein the side of the slide plate opposite the second fixed plate is further provided with an aerial plug plate.

11. The aviation plug interlocking device according to claim 1, wherein a lifting lug is fixed on the sliding plate, one end of the pulling rod is fixed on the lifting lug, the other end of the pulling rod penetrates through the second fixing plate to extend out, a pressure spring is sleeved on the pulling rod, and the pressure spring is compressed between the lifting lug and the second fixing plate.

12. An aerial plug interlock, comprising:

the first end, far away from the first fixed plate, of the crank arm is connected with a roller, the first end of the crank arm sinks under the action of gravity of the roller, the second end of the crank arm is tilted, and the second end of the crank arm is inserted into a slot of the first fixed plate;

13. A power distribution switchgear comprising a cabinet, a trolley and an aerial plug interlock as claimed in any one of claims 1 to 12, the aerial plug interlock being mounted on an inner wall of the cabinet and adjacent a door panel of the cabinet, the trolley being movable relative to the cabinet.

14. The electrical distribution switchgear of claim 13 wherein said cart has an interlocking ramp that contacts rollers of said aviation plug interlock when said cart is pushed into said cabinet, pushing said rollers upward.