CN113299501B - Front and rear cabinet door locking structure of high-voltage switch cabinet - Google Patents
Front and rear cabinet door locking structure of high-voltage switch cabinet Download PDFInfo
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- CN113299501B CN113299501B CN202110657432.XA CN202110657432A CN113299501B CN 113299501 B CN113299501 B CN 113299501B CN 202110657432 A CN202110657432 A CN 202110657432A CN 113299501 B CN113299501 B CN 113299501B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
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Abstract
A front and rear cabinet door locking structure of a high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a front door and a rear door, and a circuit breaker and an isolating switch are installed in the cabinet body; the cabinet body is also provided with a transmission lever, a vertical pull rod, a curved ruler-shaped connecting rod capable of swinging and a longitudinal sliding piece capable of longitudinally sliding, and the cabinet body is also provided with a front longitudinal insertion rod and a rear longitudinal insertion rod; the front longitudinal insertion rod is fixedly connected with a front longitudinal rack, and the rear longitudinal insertion rod is fixedly connected with a rear longitudinal rack; the cabinet body is also provided with a gear; the gear is coaxially and fixedly connected with a second transmission swing arm; a swing pressure lever is also arranged. According to the invention, after the breaker and the isolating switch are both switched on, the front door and the rear door cannot be opened, and the locking relation is reliable.
Description
Technical Field
The invention belongs to the technical field of power switch cabinets, and particularly relates to a front cabinet door and rear cabinet door locking structure of a high-voltage switch cabinet.
Background
The front door and the rear door are arranged in front of the high-voltage switch cabinet, and the breaker and the isolating switch are installed in the cabinet body. Because the circuit breaker has the arc extinguishing function and the isolating switch does not have the arc extinguishing function, according to the operating regulation, the isolating switch must be switched on first and then the circuit breaker is switched on when power is transmitted, and the circuit breaker must be switched off first and then the isolating switch is switched off when power is cut off.
In order to ensure the safety of operators and equipment, when the breaker and the isolating switch are both in a closing state, the front door and the rear door are strictly forbidden to be opened. To achieve this, various latching mechanisms have been devised, both mechanical and electronic. However, the locking control structure of the existing high-voltage switch cabinet is not only complex in structure, but also poor in reliability of the interlocking relationship, has the possibility of misoperation, and hides potential safety hazards.
Disclosure of Invention
The invention aims to overcome the defects and provide a front and rear cabinet door locking structure of a high-voltage switch cabinet, which can not open a front door and a rear door after a breaker and a disconnecting switch are both switched on.
In order to achieve the purpose, the front and rear cabinet door locking structure of the high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a front door and a rear door, and a circuit breaker and an isolating switch are installed in the cabinet body; the breaker is provided with a breaker operating shaft, and the axial direction of the breaker operating shaft is transverse; when the circuit breaker operating shaft rotates to a switching-on position, the circuit breaker realizes switching-on; when the breaker operating shaft rotates to the opening position, the breaker realizes opening;
the isolator is equipped with static contact and moving contact, and the moving contact can be installed in the cabinet body with swinging, and the swing orbit of moving contact is including following two function positions: a moving contact of the isolating switch contacts a static contact at a first functional position, and the isolating switch is switched on; the moving contact of the isolating switch is separated from the static contact at the second functional position, and the isolating switch is switched off;
the isolating switch is provided with an isolating switch operating shaft, and the extending direction of the isolating switch operating shaft is longitudinal;
the isolating switch operating shaft is coaxially and fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the axial direction of the second bevel gear is transverse, and the second bevel gear is coaxially and fixedly connected with a first transmission swing arm; the first transmission swing arm drives a moving contact connected with the isolating switch;
when the moving contact of the isolating switch is in a first functional position, the rotating position of the operating shaft of the isolating switch is called as a switching-on position; when the moving contact of the isolating switch is in a second functional position, the rotating position of the operating shaft of the isolating switch is called as a separating position;
the front door and the rear door are respectively provided with a lock plate capable of moving vertically and a handle capable of rotating, a transmission mechanism is arranged between the handle and the lock plate, and the handle swings to drive the lock plate to move vertically through the transmission mechanism; the lock plate is provided with a lock hole, the cabinet body is fixedly provided with a lock nail matched with the lock hole, the axial direction of the lock nail is longitudinal, the lock nail comprises a circular nail cap and a circular nail rod, and the diameter of the circular nail cap is larger than that of the circular nail rod; each lock hole comprises an upper part and a lower part, wherein one part is in a segmental shape and is called a lock hole segmental part, the other part is in a rectangular shape and is called a lock hole rectangular part, the diameter of the lock hole segmental part is larger than the diameter of a nail head of the lock nail, and the transverse width of the lock hole rectangular part is larger than the diameter of a nail rod of the lock nail and smaller than the diameter of the nail head of the lock nail;
the locking plate is provided with two functional positions in a vertical moving track, namely a locking position and an unlocking position; when the front door and the rear door are in the closed positions and the vertical position of the lock plate is in the locking position, the nail rod of the lock nail is positioned at the rectangular part of the lock hole, and the nail cap of the lock nail limits the longitudinal movement of the lock plate to lock the front door and the rear door;
when the front door and the rear door are in the closed positions and the vertical position of the lock plate is in the unlocking position, the nail rod of the lock nail is positioned at the circular segmental part of the lock hole, and the nail cap of the lock nail can not limit the longitudinal movement of the lock plate so that the front door and the rear door can be opened;
the circuit breaker is characterized in that a pressing block is coaxially and fixedly connected with an operating shaft of the circuit breaker, a first vertical pressing rod is vertically and slidably arranged below the rear part of the pressing block, a first roller is arranged at the upper end of the first vertical pressing rod, and the first roller abuts against the lower surface of the rear part of the pressing block; a first return spring for applying upward thrust to the first vertical pressure rod is further arranged in the cabinet body;
the isolating switch operating shaft is coaxially and fixedly connected with a cam, a second vertical pressure rod is vertically and slidably arranged below the cam, a second roller is arranged at the upper end of the second vertical pressure rod, and the second roller abuts against the cam;
the cabinet body is also provided with a transmission lever, a vertical pull rod, a curved ruler-shaped connecting rod capable of swinging and a longitudinal sliding piece capable of longitudinally sliding, the axial extension direction of the transmission lever is vertical to the longitudinal direction, and a fulcrum of the transmission lever is positioned in the middle of the transmission lever; the pendulum shaft of the curved-ruler-shaped connecting rod is positioned in the middle of the curved-ruler-shaped connecting rod, and the pendulum shaft of the curved-ruler-shaped connecting rod is transverse;
the lower end of the second vertical pressure rod is connected with the first end of the transmission lever, the second end of the transmission lever is connected with the upper end of the vertical pull rod, the lower end of the vertical pull rod is provided with a first transmission pin, the first end of the curved-ruler-shaped connecting rod is provided with a first long hole, the first transmission pin is sleeved in the first long hole, the second end of the curved-ruler-shaped connecting rod is provided with a second long hole, the rear end of the longitudinal sliding piece is provided with a second transmission pin, and the second transmission pin is sleeved in the second long hole;
the cabinet body can also be provided with a front longitudinal inserted bar and a rear longitudinal inserted bar in a longitudinal sliding way; the transverse position of the front longitudinal inserted rod is flush with the transverse position of the lock hole of the front door lock plate, and the transverse position of the rear longitudinal inserted rod is flush with the transverse position of the lock hole of the rear door lock plate;
when the lock plate of the front door is in a locking position, the vertical position of the lock hole segmental part of the lock plate of the front door is aligned with the front end of the front longitudinal inserted bar; when the lock pin of the rear door is in a locking position, the vertical position of the lock hole segmental part of the rear door lock plate is aligned with the rear end of the rear longitudinal inserted rod;
the front longitudinal insertion rod is fixedly connected with a front longitudinal rack, and the rear longitudinal insertion rod is fixedly connected with a rear longitudinal rack; the cabinet body is also provided with a gear, the front longitudinal rack is engaged with the upper side of the gear, and the rear longitudinal rack is engaged with the lower side of the gear;
the gear is coaxially and fixedly connected with a second transmission swing arm; the swing end of the second transmission swing arm is positioned on the front side of the gear; a second reset spring which applies upward tension to the swinging end of the second transmission swing arm is also arranged in the cabinet body;
the cabinet body is also provided with a third return spring which applies backward pulling force to the upper end of the swing pressure rod, and the elasticity of the third return spring enables the upper end of the swing pressure rod to be kept attached to the front end of the longitudinal sliding piece;
when the isolating switch operating shaft rotates to a switching-on position, the cam pushes the second vertical pressure rod to a low point of a vertical moving track of the isolating switch operating shaft through the second roller wheel, the second vertical pressure rod pulls the vertical pull rod up to a high point of the vertical moving track of the isolating switch operating shaft through the transmission lever, the vertical pull rod pushes the longitudinal sliding piece to the foremost end of the longitudinal moving track of the vertical pull rod through the curved ruler-shaped connecting rod, the longitudinal sliding piece pushes the upper end of the swinging pressure rod to the foremost end of the swinging track of the swinging pressure rod, the swinging pressure rod is in a vertical state, and the upper end of the swinging pressure rod is just positioned under the lower end of the first vertical pressure rod;
when the front door and the rear door are in the closed position, the locking plates of the front door and the rear door are in the locking position, the upper end of the swing pressure rod is positioned under the lower end of the first vertical pressure rod, and the breaker operating shaft rotates to the switching-on position, the pressing block overcomes the elasticity of a first return spring through a first roller to push a first vertical pressing rod to the lowest point of the vertical moving track of the pressing block, the first vertical pressing rod presses the swinging end of a second transmission swinging arm to the lowest point of the swinging track of the first vertical pressing rod through a swinging pressing rod, the second transmission swinging arm pushes a first rack and a front longitudinal inserted link to the foremost end of the longitudinal moving track of the second vertical pressing rod through a gear, the front end of the front longitudinal inserted link is inserted into the keyhole segment-shaped part of the lock plate of the front door, meanwhile, the second transmission swing arm pushes the second rack and the rear longitudinal insertion rod to the rearmost end of the longitudinal movement track of the second rack and the rear longitudinal insertion rod through the gear, and the rear end of the rear longitudinal insertion rod is inserted into the keyhole circular segment of the lock plate of the rear door.
Preferably, a connecting rod is connected between the first transmission swing arm and the moving contact of the isolating switch, and the first transmission swing arm, the connecting rod and the moving contact of the isolating switch form a double-rocker mechanism.
The upper end surface of the swing pressure rod is provided with a concave part for embedding the lower end of the first vertical pressure rod.
The invention has the following advantages and effects:
the front door and the rear door can not be opened, and the front door and the rear door can not be opened completely under the condition of electrification in a cabinet.
And secondly, the front door and the rear door can be opened only under the condition that the breaker is opened.
In addition, the locking relationship of the present invention is reliable.
Drawings
Fig. 1 is a schematic diagram of a transverse projection structure when a circuit breaker is switched on and a disconnector is switched on according to an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view of the structure shown in fig. 1.
Fig. 3 is a schematic longitudinal projection structure of the actuating lever and its related components in the state shown in fig. 1.
Fig. 4 is another enlarged partial schematic view of the structure shown in fig. 1.
Fig. 5 is a partially enlarged schematic view of the structure shown in fig. 4.
Fig. 6 is another enlarged partial schematic view of the structure shown in fig. 4.
Fig. 7 is a schematic view of a rear door control structure in the state shown in fig. 1.
Fig. 8 is a schematic view of the front door control structure in the state shown in fig. 1.
Fig. 9 is a partially enlarged schematic view of the structure shown in fig. 8.
Fig. 10 is a partially enlarged schematic view of the structure shown in fig. 7.
Fig. 11 is a schematic diagram of the relationship between the longitudinal projection positions of the front (rear) longitudinal insertion rod and the front (rear) door lock plate when the circuit breaker is closed and the disconnector is closed.
Fig. 12 is a schematic view of the shape of the locking plate locking hole.
Fig. 13 is a schematic diagram of a lateral projection structure of the embodiment of the invention when the circuit breaker is opened and the disconnecting switch is opened.
Fig. 14 is a partially enlarged schematic view of the structure shown in fig. 13.
Fig. 15 is a schematic longitudinal projection view of the actuating lever and its associated components in the state shown in fig. 13.
Fig. 16 is another partially enlarged schematic view of the state shown in fig. 13.
Fig. 17 is a schematic view of a rear door control structure in the state shown in fig. 13.
Fig. 18 is a schematic view of the front door control structure in the state shown in fig. 13.
Fig. 19 is a partially enlarged schematic view of the structure shown in fig. 18.
Fig. 20 is a partially enlarged schematic view of the structure shown in fig. 17.
Fig. 21 is a schematic view of a state in which the rear door lock plate is moved down to the unlock position.
Fig. 22 is a schematic view of the front door-lock plate moving downward to the unlock position.
Fig. 23 is a schematic view showing a relationship between the front (rear) door lock plate and the longitudinal projection positions of the lock pin and the front (rear) longitudinal insertion rod when the front (rear) door lock plate is moved downward to the unlock position.
Detailed Description
Fig. 1 and 2 show a front and rear cabinet door locking structure of a high voltage switch cabinet, which includes a cabinet body 8, the cabinet body 8 is provided with a front door 81 and a rear door 82, and a circuit breaker and an isolating switch are installed in the cabinet body 8; the breaker is provided with a breaker operating shaft 1, and the axial direction of the breaker operating shaft 1 is transverse; when the circuit breaker operating shaft 1 rotates to a switching-on position, the circuit breaker realizes switching-on; when the breaker operating shaft 1 rotates to the opening position, the breaker realizes opening; the isolating switch is provided with a static contact 91 and a moving contact 92, the moving contact 92 can be installed in the cabinet body in a swinging manner, and the swinging track of the moving contact 92 comprises the following two functional positions: a moving contact 92 of the isolating switch contacts a fixed contact 91 at a first functional position, and the isolating switch is switched on; in the second functional position, the moving contact 92 of the isolating switch is separated from the fixed contact 91, and the isolating switch is switched off; the isolating switch is provided with an isolating switch operating shaft 9, and the extending direction of the isolating switch operating shaft 9 is longitudinal; the isolating switch operating shaft 9 is coaxially and fixedly connected with a first bevel gear 11, the first bevel gear 11 is meshed with a second bevel gear 21, the axial direction of the second bevel gear 21 is transverse, and the second bevel gear 21 is coaxially and fixedly connected with a first transmission swing arm 12; the first transmission swing arm 12 drives a moving contact 92 connected with the isolating switch; a connecting rod 93 is connected between the first transmission swing arm 12 and the movable contact 92 of the isolating switch, and the first transmission swing arm 12, the connecting rod 93 and the movable contact 92 of the isolating switch form a double-rocker mechanism. Thus, when the disconnecting switch operating shaft 9 rotates, the first bevel gear 11, the second bevel gear 21 and the first transmission swing arm 12 are driven to rotate, and the first transmission swing arm 12 pushes the movable contact 92 to swing through the connecting rod 93; when the movable contact 92 of the disconnector is in the first functional position, the rotary position of the operating shaft 9 of the disconnector is referred to as the on-position; when the movable contact 92 of the disconnector is in the second functional position, the rotary position of the operating shaft 9 of the disconnector is referred to as the disconnecting position.
As shown in fig. 1, 7, 8, 9, 10, and 11, the front door 81 and the rear door 82 are respectively provided with a lock plate 84 capable of moving vertically and a handle 80 capable of rotating, a transmission mechanism 86 is provided between the handle 80 and the lock plate 84, and the swing of the handle 80 drives the lock plate 84 to move vertically through the transmission mechanism 86;
as shown in fig. 9, 10, 11 and 12, the locking plate 84 is provided with a locking hole 85, the cabinet 8 is fixedly provided with a locking nail 83 which is matched with the locking hole 85, the axial direction of the locking nail 83 is longitudinal, the locking nail 83 comprises a circular nail cap 832 and a circular nail rod 831, and the diameter of the circular nail cap 832 is larger than that of the circular nail rod 831; each lock hole 85 comprises an upper part and a lower part, wherein the upper part is in a segmental shape and is called a lock hole segmental part 852, the lower part is in a rectangular shape and is called a lock hole rectangular part 851, the diameter of the lock hole segmental part 852 is larger than the diameter of a nail head 832 of the lock nail, and the transverse width of the lock hole rectangular part 851 is larger than the diameter of a nail rod 831 of the lock nail and is smaller than the diameter of the nail head of the lock nail;
the lock plate 84 is formed with two functional positions in the vertical movement trajectory, namely a locked position and an unlocked position; when the front door and the rear door are in the closed position and the vertical position of the lock plate 84 is in the locking position, the nail stem 831 of the nail is located in the rectangular part 851 of the lock hole, and the nail cap 832 of the nail restricts the longitudinal movement of the lock plate 84 to lock the front door 81 and the rear door 82, as shown in fig. 9, 10 and 11;
when the front door 81 and the rear door 82 are in the closed position and the vertical position of the lock plate 84 is in the unlocking position, the nail stem 831 of the lock nail is located in the keyhole circular segment-shaped portion 852, and since the diameter of the keyhole circular segment-shaped portion 852 is larger than that of the nail cap 831 of the lock nail, the nail cap 831 of the lock nail cannot limit the longitudinal movement of the lock plate 84 so that the front door 81 and the rear door 82 can be opened, as shown in fig. 21, 22 and 23;
as shown in fig. 1 and 4, a pressing block 13 is coaxially and fixedly connected to a circuit breaker operating shaft 1, the pressing block 13 rotates synchronously with the circuit breaker operating shaft 1, a first vertical pressing rod 14 is vertically slidably mounted below the rear portion of the pressing block 13, a first roller 15 is mounted at the upper end of the first vertical pressing rod 14, and the first roller 15 abuts against the lower surface of the rear portion of the pressing block 13; a first return spring 61 for applying upward thrust to the first vertical pressure rod 14 is further arranged in the cabinet body 8;
as shown in fig. 1, 2 and 3, the disconnecting switch operating shaft 9 is coaxially and fixedly connected with a cam 23, the cam 23 rotates synchronously with the disconnecting switch operating shaft 9, a second vertical pressure lever 24 is vertically slidably installed below the cam 23, a second roller 25 is installed at the upper end of the second vertical pressure lever 24, and the second roller 25 abuts against the cam 23; the cabinet body 8 is also provided with a transmission lever 3, a vertical pull rod 4, a curved ruler-shaped connecting rod 5 capable of swinging and a longitudinal sliding piece 6 capable of longitudinally sliding, the axial extension direction of the transmission lever 3 is vertical to the longitudinal direction, and a fulcrum 30 of the transmission lever 3 is positioned in the middle of the transmission lever; the pendulum shaft 50 of the curved-ruler-shaped connecting rod 5 is positioned at the middle part of the curved-ruler-shaped connecting rod, and the pendulum shaft 50 of the curved-ruler-shaped connecting rod is transverse, as shown in fig. 5;
as shown in fig. 4 and 5, the lower end of the second vertical compression bar 24 is connected to the first end of the transmission lever 3, the second end of the transmission lever 3 is connected to the upper end of the vertical pull rod 4, the lower end of the vertical pull rod 4 is provided with a first transmission pin 16, the first end of the curved-ruler-shaped connecting rod 5 is provided with a first long hole 17, the first transmission pin 16 is sleeved into the first long hole 17, the second end of the curved-ruler-shaped connecting rod 5 is provided with a second long hole 27, the rear end of the longitudinal sliding member 6 is provided with a second transmission pin 26, and the second transmission pin 26 is sleeved into the second long hole 27;
as shown in fig. 1, 4 and 6, a front longitudinal insert rod 18 and a rear longitudinal insert rod 28 are also mounted in the cabinet 8 in a longitudinally slidable manner; the transverse position of the front longitudinal insert rod 18 is flush with the transverse position of the lock hole 85 of the lock plate 84 of the front door, and the transverse position of the rear longitudinal insert rod 28 is flush with the transverse position of the lock hole 85 of the lock plate of the rear door;
when the lock plate 84 of the front door 81 is in the locked position, the vertical position of the lock hole segment 852 of the front door lock plate is aligned with the front end of the front longitudinal insert bar 18; when the lock pin 84 of the rear door 82 is in the locked position, the vertical position of the keyhole cutout 85 of the rear door latch plate is aligned with the rear end of the rear longitudinal insert bar 28, as shown in fig. 9, 10, 11;
as shown in fig. 1, 4 and 6, the front longitudinal insertion rod 18 is fixedly connected with a front longitudinal rack 19, and the rear longitudinal insertion rod 28 is fixedly connected with a rear longitudinal rack 29; the cabinet body 8 is also provided with a gear 39, the front longitudinal rack 19 is engaged with the upper side of the gear 39, and the rear longitudinal rack 29 is engaged with the lower side of the gear 39;
as shown in fig. 1, 4 and 6, the gear 39 is coaxially and fixedly connected with the second transmission swing arm 22, and the two move synchronously around the central axis of the gear 39; the swing end of the second transmission swing arm 22 is positioned at the front side of the gear 39; a second return spring 62 for applying an upward pulling force to the swinging end of the second transmission swinging arm 22 is further arranged in the cabinet body, as shown in fig. 4 and 5;
as shown in fig. 1, 4, 5 and 12, a swing pressure lever 7 is further provided, a lower end of the swing pressure lever 7 is hinged to a swing end of the second transmission swing arm 22 by a hinge shaft 70, an axial direction of the hinge shaft 70 is a transverse direction, a third return spring 63 for applying a backward pulling force to an upper end of the swing pressure lever 7 is further provided in the cabinet, and an elastic force of the third return spring 63 keeps the upper end of the swing pressure lever 7 against a front end of the longitudinal sliding member 6; the upper end surface of the swing pressure lever 7 is formed with a concave portion 71 into which the lower end of the first vertical pressure lever 14 is fitted.
The components form the following matching relationship:
when the disconnecting switch operating shaft 9 rotates to the switching-on position, the high point of the cam surface of the cam 23 is aligned with the second roller 25, the cam 23 pushes the second vertical pressure rod 24 to the low point of the vertical moving track thereof through the second roller 25, the second vertical pressure rod 24 pulls the vertical pull rod 4 up to the high point of the vertical moving track thereof through the transmission lever 3, the vertical pull rod 4 pushes the longitudinal sliding member 6 to the foremost end of the longitudinal moving track thereof through the curved ruler-shaped connecting rod 5 (specifically, the vertical pull rod 4 pulls the first end of the curved ruler-shaped connecting rod 5 to the uppermost end of the swinging track thereof, the second end of the curved ruler-shaped connecting rod 5 swings to the foremost end of the swinging track thereof, so that the second end of the curved ruler-shaped connecting rod 5 pushes the longitudinal sliding member 6 to the foremost end of the longitudinal moving track thereof), the longitudinal sliding member 6 pushes the upper end of the swinging pressure rod 7 to the foremost end of the swinging track thereof, so that the swinging pressure rod 7 is in the vertical state, and the upper end of the swing compression bar 7 is just below the lower end of the first vertical compression bar 14, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6;
when the front door 81 and the rear door 82 are in the closed position, the lock plate 84 of the front door and the rear door is in the locked position, the upper end of the swing pressure lever 7 is positioned right below the lower end of the first vertical pressure lever 14, and the breaker operating shaft 1 rotates to the switch-on position, the press block 13 pushes the first vertical pressure lever 14 to the lowest point of the vertical moving track thereof by the first roller 15 against the elastic force of the first return spring 61, the swing end of the second transmission swing arm 22 is pressed to the lowest point of the swing track thereof by the first vertical pressure lever 14 through the swing pressure lever 7, the second transmission swing arm 22 pushes the first rack 19 and the front longitudinal insert lever 18 to the foremost end of the longitudinal moving track thereof through the gear 39, the front end of the front longitudinal insert lever 18 is inserted into the lock hole notch portion 852 of the lock plate 84 of the front door, and simultaneously the second transmission swing arm 22 pushes the second rack 29 and the rear longitudinal insert lever 28 to the rearmost end of the longitudinal moving track thereof through the gear 39, the rear end of the rear vertical insertion rod 28 is inserted into the keyhole round portion 852 of the lock plate of the rear door, as shown in fig. 4, 5, 6, 7, 8, 9, 10, and 11.
The locking principle of the above embodiment is as follows:
(1) when ready to power transmission, the front door 81 and the rear door 82 are in the closed position, and the lock plates 84 of the front door 81 and the rear door 82 are in the locked position;
(2) when the power is normally supplied, the isolating switch is switched on, the isolating switch operating shaft 9 rotates to the switching-on position, and the concave part 71 at the upper end of the swinging pressure rod 7 is just positioned right below the lower end of the first vertical pressure rod 14; then the circuit breaker is closed again, the circuit breaker operating shaft 1 rotates to the closing position, the lower end of the first vertical pressure rod 14 is embedded into the concave part 71 at the upper end of the swing pressure rod 7 and then the swing pressure rod 7 is continuously pushed downwards, so that the front end of the front vertical insertion rod 18 is inserted into the lock hole circular-segment-shaped part 852 of the lock plate 84 of the front door, the rear end of the rear vertical insertion rod 28 is inserted into the lock hole circular-segment-shaped part 852 of the lock plate of the rear door, therefore, the lock plate 84 of the front door is limited to the locking position and cannot move vertically, the lock hole rectangular part 851 of the lock plate 84 is fixedly sleeved outside the lock nail 831 of the cabinet body, because the transverse width of the lock hole rectangular part 851 is smaller than the diameter of the nail cap 832 of the lock nail, the nail cap 832 of the lock nail limits the longitudinal movement of the lock plate 84 of the front door and the rear door to lock the front door and the rear door, therefore, the front door 81 and the rear door 82 can not be opened, and the situation that the front door 81 and the rear door can not be opened under the condition that the cabinet body is electrified can be completely closed, A rear door 82, as shown in fig. 1-11;
(3) when power needs to be cut off, the breaker is opened, the breaker operating shaft 1 rotates to the opening position, the pressing block 13 moves upwards in contact with the first roller 15, the elastic force of the first return spring 61 pulls the first vertical pressing rod 14 to the highest point of the vertical moving track of the first vertical pressing rod, the lower end of the first vertical pressing rod 14 is separated from the concave part 71 at the upper end of the swinging pressing rod 7, and the two parts generate a vertical distance; then, the disconnecting switch operating shaft 9 is rotated to the opening position, the high point of the cam surface of the cam 23 is rotated to be away from the second roller 25, then under the action of the elastic force of the third return spring 63, the upper end of the swing pressure rod 7 swings backwards to push the longitudinal sliding piece 6 to move the rearmost end of the longitudinal moving track, the longitudinal sliding piece 6 pulls the vertical pull rod 4 down to the low point of the vertical moving track through the curved ruler-shaped connecting rod 5, and the vertical pull rod 4 pushes the second vertical pressure rod 24 and the second roller 25 to the high point of the vertical moving track through the transmission lever 3; on the other hand, under the action of the elastic force of the second return spring 62, the swing end of the second driving swing arm 22 moves to the highest point of the swing track, the second driving swing arm 22 pushes the first rack 19 and the front longitudinal insertion rod 18 to the rearmost end of the longitudinal movement track through the gear 39, the front end of the front longitudinal insertion rod 18 disengages from the keyhole circular notch 852 of the front door lock plate 84, meanwhile, the second driving swing arm 22 pushes the second rack 29 and the rear longitudinal insertion rod 28 to the foremost end of the longitudinal movement track through the gear 39, and the rear end of the rear longitudinal insertion rod 28 disengages from the keyhole circular notch 852 of the rear door lock plate, as shown in fig. 12, 13, 14, 15, 16, 17, and 18;
(4) after that, as long as the handle 80 is rotated, the front door lock plate 84 and the rear door lock plate 84 are moved downward to the unlocking position, and the lock hole circular-segment-shaped portions 852 of the front door lock plate 84 and the lock hole circular-segment-shaped portions 852 of the rear door lock plate 84 are respectively aligned with the lock nails 83 of the cabinet, since the diameters of the lock hole circular-segment-shaped portions 852 are larger than the diameters of the nail caps 832 of the lock nails, the lock plates 84 can move longitudinally, that is, the front door 81 and the rear door 82 can be opened.
Claims (3)
1. A front and rear cabinet door locking structure of a high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a front door and a rear door, and a circuit breaker and an isolating switch are installed in the cabinet body; the breaker is provided with a breaker operating shaft, and the axial direction of the breaker operating shaft is transverse; when the circuit breaker operating shaft rotates to a switching-on position, the circuit breaker realizes switching-on; when the breaker operating shaft rotates to the opening position, the breaker realizes opening;
the isolator is equipped with static contact and moving contact, and the moving contact can be installed in the cabinet body with swinging, and the swing orbit of moving contact is including following two function positions: a moving contact of the isolating switch contacts a static contact at a first functional position, and the isolating switch is switched on; the moving contact of the isolating switch is separated from the static contact at the second functional position, and the isolating switch is switched off;
the isolating switch is provided with an isolating switch operating shaft, and the extending direction of the isolating switch operating shaft is longitudinal;
the isolating switch operating shaft is coaxially and fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the axial direction of the second bevel gear is transverse, and the second bevel gear is coaxially and fixedly connected with a first transmission swing arm; the first transmission swing arm drives a moving contact connected with the isolating switch;
when the moving contact of the isolating switch is in a first functional position, the rotating position of the operating shaft of the isolating switch is called as a switching-on position; when the moving contact of the isolating switch is in a second functional position, the rotating position of the operating shaft of the isolating switch is called as a separating position;
the front door and the rear door are respectively provided with a lock plate capable of moving vertically and a handle capable of rotating, a transmission mechanism is arranged between the handle and the lock plate, and the handle swings to drive the lock plate to move vertically through the transmission mechanism; the lock plate is provided with a lock hole, the cabinet body is fixedly provided with a lock nail matched with the lock hole, the axial direction of the lock nail is longitudinal, the lock nail comprises a circular nail cap and a circular nail rod, and the diameter of the circular nail cap is larger than that of the circular nail rod; each lock hole comprises an upper part and a lower part, wherein one part is in a segmental shape and is called a lock hole segmental part, the other part is in a rectangular shape and is called a lock hole rectangular part, the diameter of the lock hole segmental part is larger than the diameter of a nail head of the lock nail, and the transverse width of the lock hole rectangular part is larger than the diameter of a nail rod of the lock nail and smaller than the diameter of the nail head of the lock nail;
the locking plate is provided with two functional positions in a vertical moving track, namely a locking position and an unlocking position; when the front door and the rear door are in the closed positions and the vertical position of the lock plate is in the locking position, the nail rod of the lock nail is positioned at the rectangular part of the lock hole, and the nail cap of the lock nail limits the longitudinal movement of the lock plate to lock the front door and the rear door;
when the front door and the rear door are in the closed positions and the vertical position of the lock plate is in the unlocking position, the nail rod of the lock nail is positioned at the circular segmental part of the lock hole, and the nail cap of the lock nail can not limit the longitudinal movement of the lock plate so that the front door and the rear door can be opened;
the circuit breaker is characterized in that a pressing block is coaxially and fixedly connected with an operating shaft of the circuit breaker, a first vertical pressing rod is vertically and slidably mounted below the rear part of the pressing block, a first roller wheel is mounted at the upper end of the first vertical pressing rod, and the first roller wheel abuts against the lower surface of the rear part of the pressing block; a first return spring for applying upward thrust to the first vertical pressure rod is further arranged in the cabinet body;
the isolating switch operating shaft is coaxially and fixedly connected with a cam, a second vertical pressure rod is vertically and slidably arranged below the cam, a second roller is arranged at the upper end of the second vertical pressure rod, and the second roller abuts against the cam;
the cabinet body is also provided with a transmission lever, a vertical pull rod, a curved ruler-shaped connecting rod capable of swinging and a longitudinal sliding piece capable of longitudinally sliding, the axial extension direction of the transmission lever is vertical to the longitudinal direction, and a fulcrum of the transmission lever is positioned in the middle of the transmission lever; the pendulum shaft of the curved-ruler-shaped connecting rod is positioned in the middle of the curved-ruler-shaped connecting rod, and the pendulum shaft of the curved-ruler-shaped connecting rod is transverse;
the lower end of the second vertical pressure rod is connected with the first end of the transmission lever, the second end of the transmission lever is connected with the upper end of the vertical pull rod, the lower end of the vertical pull rod is provided with a first transmission pin, the first end of the curved-ruler-shaped connecting rod is provided with a first long hole, the first transmission pin is sleeved in the first long hole, the second end of the curved-ruler-shaped connecting rod is provided with a second long hole, the rear end of the longitudinal sliding piece is provided with a second transmission pin, and the second transmission pin is sleeved in the second long hole;
the cabinet body can also be provided with a front longitudinal inserted bar and a rear longitudinal inserted bar in a longitudinal sliding way; the transverse position of the front longitudinal inserted rod is flush with the transverse position of the lock hole of the front door lock plate, and the transverse position of the rear longitudinal inserted rod is flush with the transverse position of the lock hole of the rear door lock plate;
when the lock plate of the front door is in a locking position, the vertical position of the lock hole segmental part of the lock plate of the front door is aligned with the front end of the front longitudinal inserted bar; when the lock pin of the rear door is in a locking position, the vertical position of the lock hole segmental part of the rear door lock plate is aligned with the rear end of the rear longitudinal inserted rod;
the front longitudinal insertion rod is fixedly connected with a front longitudinal rack, and the rear longitudinal insertion rod is fixedly connected with a rear longitudinal rack; the cabinet body is also provided with a gear, the front longitudinal rack is engaged with the upper side of the gear, and the rear longitudinal rack is engaged with the lower side of the gear;
the gear is coaxially and fixedly connected with a second transmission swing arm; the swing end of the second transmission swing arm is positioned on the front side of the gear; a second reset spring which applies upward tension to the swinging end of the second transmission swing arm is also arranged in the cabinet body;
the cabinet body is also provided with a third return spring which applies backward pulling force to the upper end of the swing pressure rod, and the elasticity of the third return spring enables the upper end of the swing pressure rod to be kept attached to the front end of the longitudinal sliding piece;
when the isolating switch operating shaft rotates to a switching-on position, the cam pushes the second vertical pressure rod to a low point of a vertical moving track of the isolating switch operating shaft through the second roller wheel, the second vertical pressure rod pulls the vertical pull rod up to a high point of the vertical moving track of the isolating switch operating shaft through the transmission lever, the vertical pull rod pushes the longitudinal sliding piece to the foremost end of the longitudinal moving track of the vertical pull rod through the curved ruler-shaped connecting rod, the longitudinal sliding piece pushes the upper end of the swinging pressure rod to the foremost end of the swinging track of the swinging pressure rod, the swinging pressure rod is in a vertical state, and the upper end of the swinging pressure rod is just positioned under the lower end of the first vertical pressure rod;
when the front door and the rear door are in the closed position, the locking plates of the front door and the rear door are in the locking position, the upper end of the swing pressure rod is positioned under the lower end of the first vertical pressure rod, and the breaker operating shaft rotates to the switching-on position, the pressing block overcomes the elasticity of a first return spring through a first roller to push a first vertical pressing rod to the lowest point of the vertical moving track of the pressing block, the first vertical pressing rod presses the swinging end of a second transmission swinging arm to the lowest point of the swinging track of the first vertical pressing rod through a swinging pressing rod, the second transmission swinging arm pushes a first rack and a front longitudinal inserted link to the foremost end of the longitudinal moving track of the second vertical pressing rod through a gear, the front end of the front longitudinal inserted link is inserted into the keyhole segment-shaped part of the lock plate of the front door, meanwhile, the second transmission swing arm pushes the second rack and the rear longitudinal insertion rod to the rearmost end of the longitudinal movement track of the second rack and the rear longitudinal insertion rod through the gear, and the rear end of the rear longitudinal insertion rod is inserted into the keyhole circular segment of the lock plate of the rear door.
2. The front and rear cabinet door locking structure of the high-voltage switch cabinet as claimed in claim 1, wherein: a connecting rod is connected between the first transmission swing arm and the moving contact of the isolating switch, and the first transmission swing arm, the connecting rod and the moving contact of the isolating switch form a double-rocker mechanism.
3. The front and rear cabinet door locking structure of the high-voltage switch cabinet as claimed in claim 1, wherein: the upper end surface of the swing pressure rod is provided with a concave part for embedding the lower end of the first vertical pressure rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110657432.XA CN113299501B (en) | 2021-06-12 | 2021-06-12 | Front and rear cabinet door locking structure of high-voltage switch cabinet |
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| CN202110657432.XA CN113299501B (en) | 2021-06-12 | 2021-06-12 | Front and rear cabinet door locking structure of high-voltage switch cabinet |
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| CN113299501B true CN113299501B (en) | 2022-04-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2478268Y (en) * | 2000-12-08 | 2002-02-20 | 上海宝菱电气控制设备有限公司 | Safety locking device of electrical high voltage switch cubicle |
| CA2922450A1 (en) * | 2013-08-28 | 2015-03-05 | Mitsubishi Electric Corporation | Panel device |
| EP3319104B1 (en) * | 2016-11-02 | 2019-03-20 | LSIS Co., Ltd. | Door locking device of distribution board of air circuit breaker |
| CN111415831A (en) * | 2020-03-14 | 2020-07-14 | 广东正超电气有限公司 | Mechanical locking control mechanism for grounding switch and cable chamber door of switch cabinet |
| CN211081349U (en) * | 2019-08-15 | 2020-07-24 | 山东融鑫电气有限公司 | Mechanical interlocking mechanism of handcart type high-voltage switch cabinet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11242703B2 (en) * | 2014-12-23 | 2022-02-08 | Eaton Intelligent Power Limited | Low profile arc resistant door latching mechanism |
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2021
- 2021-06-12 CN CN202110657432.XA patent/CN113299501B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2478268Y (en) * | 2000-12-08 | 2002-02-20 | 上海宝菱电气控制设备有限公司 | Safety locking device of electrical high voltage switch cubicle |
| CA2922450A1 (en) * | 2013-08-28 | 2015-03-05 | Mitsubishi Electric Corporation | Panel device |
| EP3319104B1 (en) * | 2016-11-02 | 2019-03-20 | LSIS Co., Ltd. | Door locking device of distribution board of air circuit breaker |
| CN211081349U (en) * | 2019-08-15 | 2020-07-24 | 山东融鑫电气有限公司 | Mechanical interlocking mechanism of handcart type high-voltage switch cabinet |
| CN111415831A (en) * | 2020-03-14 | 2020-07-14 | 广东正超电气有限公司 | Mechanical locking control mechanism for grounding switch and cable chamber door of switch cabinet |
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| CN113299501A (en) | 2021-08-24 |
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