CN103093984B - Switchgear earthing switch and cable room door interlocking mechanism - Google Patents

Abstract

The invention discloses an interlocking mechanism between a switch cabinet grounding switch and a cable chamber door, which includes a reversing device, a hook, a detection device, a transmission shaft, a cam, an operating seat and a latch; the operating seat is provided with an axial through hole and a radial through hole. hole; one end of the transmission shaft drives the grounding knife of the grounding switch through the reversing device, and the other end passes through the shaft hole of the cam and is installed in the radial through hole of the operating seat; one end of the hook slides on the operating seat and is located under the cam, and the other end It is set as a hook; one end of the return spring is installed on the detection device, and the other end is installed on the hook; one end of the latch is set in the axial through hole of the operating seat, and the other end is set in the detection device, and the detection device is linked with the cable chamber door; When the door of the cable compartment is opened, the detection device raises the pin, and the pin is exposed in the axial through hole of the operating seat. When the door of the cable compartment is closed, the detection device lowers the pin, and the pin is hidden in the axial through hole of the operating seat. The invention has good safety and high reliability, and effectively guarantees the safety of operators.

Description

An interlocking mechanism between the grounding switch of the switch cabinet and the door of the cable room

technical field

The utility model relates to an interlocking mechanism of a switch cabinet, in particular to an interlocking mechanism of a grounding switch of the switch cabinet and a cable room door.

Background technique

When the high-voltage switchgear is normally powered, the grounding switch installed in it is in the open state. When the high-voltage switchgear needs to be repaired, in order to ensure the personal safety of the maintenance personnel, the grounding switch must be in the closed state. In order to prevent maintenance personnel from calling suddenly during power outage maintenance, as well as the residual charge on the electrical equipment disconnected by the high-voltage switchgear, and to ensure the personal safety of maintenance personnel, when performing maintenance on electrical equipment, for each equipment that may be powered and may The equipment that generates induced voltage must be grounded by closing the grounding switch.

In the prior art, in order to ensure that the grounding switch is closed and grounded when the cable room door of the high-voltage switchgear is opened, an interlock mechanism is usually provided to connect with the grounding knife of the grounding switch. When closing, drive the interlock mechanism through the operating handle, the linkage grounding knife is in the closing position, and then open the door of the cable room; Opening position. Therefore, the prior art cannot ensure that: one, the front and rear cable chamber doors can be opened only after the grounding switch is closed;

In view of the above-mentioned defects in the prior art, the inventor developed an interlocking mechanism between the grounding switch of the switch cabinet and the cable room door which overcomes the above-mentioned defects, and this case arose from this.

Contents of the invention

The object of the present invention is to provide an interlocking mechanism of a switch cabinet grounding switch and a cable room door with good safety and high reliability.

To achieve the above object, the solution of the present invention is:

An interlocking mechanism for a switch cabinet grounding switch and a cable room door, installed in the cabinet body of the switch cabinet, including a reversing device, a hook, a return spring, a detection device, a transmission shaft, a cam, an operating seat and a latch; the operating seat An axial through hole and a radial through hole are arranged on the top; one end of the transmission shaft drives the grounding knife of the grounding switch through the reversing device, and the other end passes through the shaft hole of the cam and is installed in the radial through hole of the operating seat; one end of the hook slides It is located on the operating seat and below the cam, and the other end is set as a hook; one end of the return spring is installed on the detection device, and the other end is installed on the hook; one end of the latch is set in the axial through hole of the operating seat, and the other end is Installed in the detection device, the detection device is linked with the door of the cable compartment; when the door of the cable compartment is opened, the detection device raises the pin, and the pin is exposed to the axial through hole of the operating seat; when the door of the cable compartment is closed, the detection device lowers the pin , The pin is hidden in the axial through hole of the operating seat.

Further, the detection device includes a base, a connecting shaft, an actuating shaft and a pin; the actuating shaft is arranged in the base in a manner of moving up and down, its upper end is fixedly connected with the latch, a reset spring is arranged at the lower end, and an axial slit is arranged on the actuating shaft. The pin is set in the axial sectional groove; the connecting shaft is set in the base in a way of moving left and right, one end of which is linked with the door of the cable room, and the other end is set as a slope, the slope faces downward and is opposite to the pin; the connection between the connecting shaft and the base Set return spring between.

Further, the detection device also includes a connecting rod, which is arranged in the base in a manner of moving left and right, and is located under the connecting shaft. Set return spring between.

Further, the reversing device includes a large bevel gear and a small bevel gear, the large bevel gear drives the grounding knife of the grounding switch, and the small bevel gear meshes with the large bevel gear and is fixedly connected with the transmission shaft.

Further, the reversing device also includes a bevel-shaped steering wheel; the bevel-shaped steering wheel is connected with the locking buckle of the rear cable chamber door through a linkage shaft, and meshes with the large bevel gear.

Further, the pressing piece is provided with an inclined surface, and the inclined surface of the pressing piece is opposite to the inclined surface of the connecting shaft.

After adopting the above scheme, when the cable compartment door is closed, the hook portion of the hook hooks the cable compartment door under the action of the return spring, so that the cable compartment door cannot be opened, ensuring safety.

It is necessary to open the door of the cable room. When overhauling the switchgear, use the operating handle to rotate the transmission shaft 180 degrees clockwise (facing the front of the axial through hole of the switchgear), and the grounding knife of the grounding switch driven by the rotating shaft is rotated from vertical to horizontal. Turn the shaft to make the cam rotate 180 degrees clockwise at the same time, forcing the hook to move down, so that the hook part of the hook is disengaged from the cable compartment door, and the cable compartment door can be opened to ensure that the grounding switch is closed. The door of the cable compartment can only be opened under the state of the gate, which improves safety and reliability; at this time, the detection device raises the latch, and the latch is exposed to the axial through hole of the operating seat, so that the operating handle cannot be inserted and rotated to ensure the open state of the cable compartment door Down, the grounding switch is always closed to ensure safety.

After the overhaul is completed, when the door of the cable room needs to be closed, the detection device will lower the pin, and the pin is hidden in the axial through hole of the operating seat, so that the operating handle can be inserted and the transmission shaft rotated 180 degrees counterclockwise, and the grounding knife of the transmission grounding switch Rotate from the horizontal direction to the vertical direction to open the grounding switch; at the same time, the rotating shaft makes the cam rotate 180 degrees counterclockwise, so that the hook is in a free state. Under the action of the return spring, the hook part engages the cable chamber door Make sure that the cable compartment door is closed before the grounding switch can be opened to further ensure safety and reliability.

Description of drawings

Fig. 1 is a combination diagram of Embodiment 1 of the present invention;

Fig. 2 is a diagram of the opening state of the cable compartment door according to the embodiment of the present invention;

Fig. 3 is a diagram of a closed state of the cable compartment door according to the embodiment of the present invention;

Fig. 4 is the combined diagram of the second embodiment of the present invention;

Fig. 5 is a diagram of the opening state of the grounding switch according to Embodiment 2 of the present invention;

Fig. 6 is a diagram of the closing state of the grounding switch according to Embodiment 2 of the present invention;

Fig. 7 is another state diagram of the grounding switch opening in the second embodiment of the present invention;

Fig. 8 is a diagram showing the opening state of the front and rear cable compartment doors of the second embodiment of the present invention;

Fig. 9 is a diagram of the closed state of the rear cable compartment door of the second embodiment of the present invention;

Fig. 10 is a diagram of the closed state of the front cable compartment door of the second embodiment of the present invention;

Fig. 11 is a diagram showing the simultaneous closing of the front and rear cable compartment doors in Embodiment 2 of the present invention.

Label description

Operating seat 1

Axial through hole 11 Radial through hole 12

Drive shaft 2 Reversing device 3

Large bevel gear 31 Small bevel gear 32

Umbrella steering wheel 33 linkage shaft 34

Latch buckle 35 Cam 4

Hook 5 Hook 51

Return spring 6 Detection device 7

Action shaft 71 Axial slot 711

Base 72

Mounting holes (721, 722) Return springs (73, 76, 78)

Pin 74 Connecting shaft 75

Inclined surface 751 Connecting rod 77

Tablet 771 Bevel 7711

Pin 8 Grounding switch 9

Ground Knife 91.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 to Fig. 3, the present invention discloses a first embodiment of an interlocking mechanism between a switch cabinet grounding switch and a cable compartment door, which is installed in the cabinet body of the switch cabinet, which includes an operating seat 1, a transmission shaft 2, Reversing device 3, cam 4, grab 5, return spring 6, detection device 7 and latch 8.

An axial through hole 11 and a radial through hole 12 are arranged on the operating seat 1 , and the axial through hole 11 and the radial through hole 12 communicate with each other.

One end of the transmission shaft 2 drives the grounding knife 91 of the grounding switch 9 through the reversing device 3 , and the other end passes through the shaft hole 41 of the cam 4 and is installed in the radial through hole 12 of the operating seat 1 .

One end of the grab hook 5 is slidably arranged on the operating seat 1 and is located below the cam 4. A chute can be set at one end of the grab hook 5. Correspondingly, a slide block is arranged on the operating seat 1, and the slide block is placed in the chute. Other sliding ways are provided, and the other end is provided as a hook portion 51 .

One end of the return spring 6 is installed on the detection device 7 , and the other end is installed on the hook 5 .

One end of the bolt 8 is set in the axial through hole 11 of the operating seat 1, and the other end is set in the detection device 7, and the detection device 7 is linked with the cable chamber door (not shown in the figure).

In the first embodiment, the detection device 7 includes an actuating shaft 71 , a base 72 , return springs ( 73 , 76 ), a pin 74 and a connecting shaft 75 .

The action shaft 71 is arranged in the base 72 in a manner of moving up and down, specifically: the upper end of the base 72 is provided with a mounting hole 721, and the lower end is also provided with a mounting hole 722, and the action shaft 71 is placed in the mounting holes 71 and 72. The lower end of 71 is sleeved with back-moving spring 73, and the upper end is provided with a limit ring that limits its disengagement from mounting hole 721. The upper end of action shaft 71 is fixedly connected with latch 8, and the lower end is provided with back-moving spring 73. Axial sectional groove 711 is set on action shaft 71, and the pin 74 is set in the axial sectional groove 711.

The connecting shaft 75 is arranged in the base 72 in a manner of moving left and right, one end of which is linked with the cable chamber door, and the other end is set as an inclined plane 751, which faces downward and is opposite to the pin 74, and between the connecting shaft 75 and the base 72 is also A return spring 76 is provided.

In Embodiment 1, the reversing device 3 includes a large bevel gear 31 and a small bevel gear 32, the large bevel gear 31 drives the grounding knife 91 of the grounding switch 9, the small bevel gear 32 meshes with the large bevel gear 31 and is fixedly connected to the transmission shaft 2 .

Embodiment 1 is suitable for a switchgear with a single-leaf cable compartment door. When in use, when the cable compartment door is closed, the hook 51 of the hook 5 will block the cable compartment door under the action of the return spring 6, so that the cable compartment door The door cannot be opened for security.

When it is necessary to overhaul the switchgear and open the door of the cable room, use the operating handle (not shown in the figure) to rotate the transmission shaft 2 clockwise 180 degrees, and the grounding knife 91 of the transmission grounding switch 9 is rotated from the vertical direction to the horizontal direction, so that The grounding switch 9 is closed; at the same time, the cam 4 is rotated 180 degrees clockwise, forcing the hook 5 to move down, so that the hook 51 of the hook 5 is disengaged from the engagement of the cable compartment door, and the cable compartment door can be opened to ensure that the grounding switch 9 Only in the closed state can the cable chamber door be opened to improve safety and reliability; when the cable chamber door is opened, the connecting shaft 75 moves under the action of the return spring 76, and the action shaft 71 loses its restraint by the slope 751 of the connecting shaft 75, and the action shaft 71 moves up under the action of the return spring 73, and the transmission pin 8 moves up, so that the pin 8 is exposed to the axial through hole 11. At this time, the operating handle cannot be inserted. As shown in Figure 2, ensure that the cable compartment door is open. The grounding switch 9 is always on to ensure safety.

As shown in Figure 3, when the cable compartment door is closed after the overhaul is completed, the cable compartment door drives the connecting shaft 75 to move, and the slope 751 of the connecting shaft 75 pushes the pin 74, and the pin 74 drives the action shaft 71 to move downward, so that the latch 8 moves down and Hidden in the axial through hole 11 of the operating seat 1, at this time, the operating handle can be inserted and the transmission shaft 2 rotates 180 degrees counterclockwise, and the grounding knife 91 of the transmission grounding switch 9 rotates from the horizontal direction to the vertical direction, so that the grounding The switch 9 is opened; the rotating shaft 2 makes the cam rotate counterclockwise 180 degrees at the same time, and the hook 5 is under the action of the return spring 6, and its hook 51 engages with the cable compartment door to ensure that the cable compartment door is closed before the grounding switch can be opened. , to further ensure safety and reliability.

Referring to Fig. 4 to Fig. 11, the present invention discloses a second embodiment of an interlocking mechanism between a switch cabinet grounding switch and a cable compartment door.

The difference between the second embodiment and the first embodiment is that the detection device 7 includes a connecting rod 77 in addition to the action shaft 71, the base 72, the return spring (73, 76), the pin 74 and the connecting shaft 75. The way of moving is set in the base, and is located under the connecting shaft 75. Its setting method is the same as that of the connecting shaft 75. One end of it is linked with the rear cable compartment door, and the other end is pivotally connected to the pressing piece 771. The connecting rod 77 is connected to the base. Back-moving spring 78 is set between seat 72; For convenience pressing piece 771 and the inclined-plane 751 extrusion of connecting shaft 75, pressing piece 771 is also provided with inclined-plane 7711, and the inclined-plane 7711 of pressing piece 771 is opposite to the inclined-plane 751 of connecting shaft 75.

In the first embodiment, the pin 74 is set at the middle end of the axial slit 711. Unlike the first embodiment, the pin 74 is set at the lower end of the axial slit 711 in the second embodiment, so that the connecting rod 77 can be pressed into pieces. 771 is pressed against the inclined surface 751 of the connecting shaft 75, and then the actuating shaft 71 is moved downward.

The difference between the second embodiment and the first embodiment is that the reversing device 3 also includes an umbrella-shaped steering wheel 33; the umbrella-shaped steering wheel 33 is connected with the locking buckle 35 of the rear cable compartment door through a linkage shaft 34, and is connected with the large bevel gear 31 engagement.

Embodiment 2 is suitable for a switch cabinet with front and rear double-leaf cable compartment doors. As shown in FIG. Blocked, so that the front cable compartment door cannot be opened to ensure safety; the rear cable compartment door is locked under the action of the locking buckle 35, and cannot be opened to ensure safety.

When it is necessary to overhaul the switchgear and open the door of the cable room, as shown in Figure 6, use the operating handle (not shown in the figure) to rotate the transmission shaft 2 clockwise by 180 degrees, and the grounding knife 91 of the transmission grounding switch 9 will move from the vertical direction Turn to the horizontal direction to close the grounding switch 9; at the same time, turn the cam 4 clockwise 180 degrees to force the hook 5 to move down, so that the hook 51 of the hook 5 is out of engagement with the front cable compartment door, and the front door can be opened. Cable chamber door; the transmission shaft 2 drives the linkage shaft 34 through the reversing device 3, and makes the locking buckle 35 rotate 180 degrees clockwise to release the locking of the rear cable chamber door, and the rear cable chamber door can be opened; therefore, after ensuring the grounding Only when the switch 9 is closed can the front and rear cable compartment doors be opened, which improves safety and reliability.

When the front and rear cable compartment doors are opened, as shown in Figure 8, the connecting shaft 75 moves to the right under the action of the return spring 76, and the connecting rod 77 moves to the left under the action of the returning spring 78. At this time, the inclined plane 751 of the connecting shaft 75 And the pressing piece of connecting rod 77 loses the restraint to action shaft 71, and action shaft 71 moves up under the effect of back-moving spring 73, and transmission pin 8 moves up, and pin 8 is exposed in axial through hole 11, and at this moment, operating handle Unable to insert, ensure that under the open state of the cable chamber door, the grounding switch 9 is always on to ensure safety.

After the overhaul is completed, when the rear cable compartment door is closed, as shown in Figure 9, the rear cable compartment door drives the connecting rod 77 to move, and the pressing piece 771 of the connecting rod 77 is inserted into the axial slit 711 of the action shaft 71

Among them, since the pin 74 is arranged at the lower end of the axial slit 711, the pressing piece 771 does not press the pin 74, and the actuating shaft 71 does not move.

When closing the front cable compartment door, as shown in Figure 10, the front cable compartment door transmission connecting shaft 75 moves to the right, and the inclined plane 751 of the connecting shaft 75 is inserted in the axial sectional groove 711 of the action shaft 71, because the pin 74 is arranged on the axial At the lower end of the slot 711, the inclined surface 751 of the connecting shaft 75 does not press the pin 74, and the actuating shaft 71 does not move.

When the front and rear cable chamber doors are closed at the same time, as shown in Figure 11, the pressing piece 771 of the connecting rod 77 and the inclined surface 751 of the connecting shaft 75 are inserted into the axial slit 711 of the action shaft 71 at the same time, and the pressing piece 771 and the inclined surface 751 cooperate Squeeze the pin 74 under the action, press the action shaft 71 down, drive the latch 8 to move down and hide it in the axial through hole 11 of the operating seat 1, at this time, the operating handle can be inserted and the transmission shaft 2 can be rotated 180 degrees counterclockwise , the grounding knife 91 of the transmission grounding switch 9 rotates from the horizontal direction to the vertical direction, so that the grounding switch 9 is opened; the rotating shaft 2 makes the cam rotate 180 degrees counterclockwise at the same time, and the hook 5 is under the action of the return spring 6, and its hook 51 snap the front cable compartment door to ensure that the front cable compartment door is closed; the drive shaft 2 also passes the reversing device 3 transmission linkage shaft 34, and makes the locking buckle 35 rotate 180 degrees counterclockwise to lock the rear cable compartment door. Therefore, only when the front and rear cable compartment doors are closed simultaneously, can the operating handle be used to rotate the drive shaft 2 to make the grounding switch 9 open, further ensuring the safety of operation.

The above-mentioned orientation words such as front, back, left, right, up, and down are only for convenience of description, and are not intended to limit the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not limitations on the design of this case. All equivalent changes made according to the design key of this case all fall within the scope of protection of this case.

Claims (6)

1. the interlocking mechanism of a kind of switch cabinet grounding switch and cable chamber door, be installed in the cabinet of switch cubicle it is characterised in that： Including reversing arrangement, grab, back-moving spring, detection means, power transmission shaft, cam, operation seat and latch；Setting axial direction on operation seat Through hole and radial direction through hole；Power transmission shaft one end is driven the earthing of earthed switch by reversing arrangement, and the other end passes through the axle of cam Hole is simultaneously arranged in the radial direction through hole of operation seat；Grab one end is slidably installed on operation seat and is located at the lower section of cam, and the other end sets It is set to hook portion；Back-moving spring one end is installed on detection means, and the other end is arranged on grab；Latch one end is arranged on operation seat Axially extending bore in, the other end is arranged in detection means, and detection means and cable chamber door link；When cable chamber door is opened, Detection means makes latch rise, and latch is exposed to the axially extending bore of operation seat, and when cable chamber door is closed, detection means makes latch Decline, latch is hidden in the axially extending bore of operation seat.

2. as claimed in claim 1 a kind of switch cabinet grounding switch and cable chamber door interlocking mechanism it is characterised in that：Detection Device includes pedestal, connecting shaft, action axle and pin；Action axle is arranged in pedestal in the way of moving up and down, its upper end with Latch is fixedly connected, and lower end arranges back-moving spring, and action axle arranges axial profile groove, and pin is arranged in axial profile groove；Connect Axle is arranged in pedestal in the way of moving left and right, and its one end is linked with cable chamber door, and the other end is set to inclined-plane, and inclined-plane is down And it is relative with pin；Back-moving spring is set between connecting shaft and pedestal.

3. as claimed in claim 2 a kind of switch cabinet grounding switch and cable chamber door interlocking mechanism it is characterised in that：Detection Device also includes connecting rod, and connecting rod is arranged in pedestal in the way of moving left and right, and be located at connecting shaft under, its one end with Cable chamber door linkage afterwards, other end pivot joint tabletting, back-moving spring is set between connecting rod and pedestal.

4. as claimed in claim 1 a kind of switch cabinet grounding switch and cable chamber door interlocking mechanism it is characterised in that：Commutation Device includes large bevel gear and cone pinion, and large bevel gear is driven the earthing of earthed switch, and cone pinion is nibbled with large bevel gear Close and be fixedly connected with power transmission shaft.

5. as claimed in claim 4 a kind of switch cabinet grounding switch and cable chamber door interlocking mechanism it is characterised in that：Commutation Device also includes umbellate form deflecting roller；Umbellate form deflecting roller is connected with the locking button of rear cable chamber door by universal driving shaft, and with gamp tooth Wheel engagement.

6. as claimed in claim 3 a kind of switch cabinet grounding switch and cable chamber door interlocking mechanism it is characterised in that：Tabletting It is provided with inclined-plane, and the inclined-plane of tabletting is relative with the inclined-plane of connecting shaft.