CN105449568B - A kind of interlock of switch cabinet shutter and middle door - Google Patents

Abstract

The invention discloses an interlocking device for a valve and a middle door of a switch cabinet. The device comprises a transmission shaft, a bracket and a locking device. The transmission shaft has a power input end for connecting with the output end of the valve. The arm, the locking arm, the bracket is rotated and equipped with an interlocking plate, and the bracket is also hinged with a curved plate. The interlocking plate is respectively provided with a hinge part and a lock tongue part on the front and rear sides of its rotation axis. The locking device includes a push plate and Lock plate, the front end of the lock plate is the lock end, and the front end of the push plate is the stop end. When the valve is in the open position, the lock end cooperates with the lock tongue part in a limited position, and the stop end pushes and cooperates with the bent plate. When the valve is in the closed position, the deadbolt releases the limit on the buckle end, and the push plate releases the limit on the bent plate after the locking device moves backward, and the bent plate resets under the action of the reset part and locks the lock on the drive shaft. The stop arm carries out stop rotation limit. The function that the valve cannot be accidentally opened when the middle door is opened is realized, and the interlocking reliability is higher.

Description

A kind of interlocking device for switchgear valve and middle door

technical field

The invention relates to the technical field of switchgear manufacturing, in particular to an interlocking device for a valve and a middle door of a switchgear.

Background technique

In the field of switchgear manufacturing technology, the middle door of most switchgears corresponds to the circuit breaker handcart room. When the circuit breaker handcart advances from the isolation position in the switchgear to the working position, the circuit breaker handcart drives the valve The sliding door outside the head box is opened to allow the moving contacts on the circuit breaker trolley to be inserted into the static contacts in the contact box. When the circuit breaker trolley moves out to the isolation position or outside the switch cabinet, the sliding door will rely on the valve mechanism Spring force or the action of the valve's own gravity to close; the traditional switch cabinet door and the circuit breaker handcart generally do not have an interlock device, regardless of whether the circuit breaker handcart is in working or isolated state, the door of the switch cabinet can be opened at will If the door of the switch cabinet is opened at will when the handcart of the circuit breaker is in working condition, there will be a danger of electric shock. There are potential safety hazards to personal safety.

In view of the above problems, Chinese patent CN201174532Y (authorized announcement date is December 31, 2008) discloses an interlocking device for the valve and the door panel of the power distribution cabinet. device, the connecting rod is fixed on the valve, the transmission connecting lever is rotated and arranged on the cabinet body, and the dead bolt connecting lever is connected on the cabinet body. The locking device is on the side of the middle door. The specific working process is as follows: after the handcart enters and exits, the connecting rod drives the valve to move downward, and at the same time, the connecting rod drives one end of the transmission connecting plate to rotate counterclockwise, and the other end of the transmission connecting pull drives the end of the lock tongue connecting pull to rotate clockwise, and the lock bolt connects The hooked end of the wrench falls, disengages the locking device, and the cabinet door can be opened. At this time, the valve isolates the primary high-voltage electricity, and the operator will not directly face the primary high-voltage electricity when opening the cabinet door. When the valve does not fall, the connecting rod, the transmission lever and the bolt lever are all in a static state, and the other end of the bolt lever is locked in the locking device, and the operator cannot open the cabinet door, which improves the reliability of power distribution to a certain extent. safety. But there are also some problems in this interlocking device. For example, when the cabinet door is in the open state, the valve door can still be opened, and the door closing operation cannot be realized. In the case of misoperation, there is a certain potential safety hazard.

Contents of the invention

The purpose of the present invention is to provide an interlocking device for the valve and middle door of a switchgear to solve the technical problems of the existing interlocking device that the valve can be opened by mistake when the middle door is open and the safety and reliability are low.

In order to achieve the above object, the technical scheme of the interlocking device of the switch cabinet valve and the middle door in the present invention is as follows: the interlocking device of the switch cabinet valve and the middle door includes a transmission shaft, a support, and a locking device whose axis extends in the left and right directions, and the The transmission shaft has a power input end for connecting with the output end of the valve. The transmission shaft is provided with a transmission arm and a locking arm that rotate together with it. An interlocking plate is rotatably mounted on the support, and the rotation of the interlocking plate The axis is parallel to the axis of the drive shaft, and a curved plate is hingedly connected to the bracket. There is a hinge part and a lock tongue part, the hinge part is movably connected with the transmission arm, the locking device includes a push plate and a lock plate, the front end of the lock plate is a buckle end, and the front end of the push plate is a stop The rear end of the locking plate and the push plate are all connecting ends for connecting with the middle door. When the valve is in the open position, the locking end and the locking tongue part are limitedly matched to block the locking plate. Moving backwards, the stop end is pushed and matched with the curved plate. When the valve is in the closed position, the locking tongue of the interlocking plate releases the limit to the buckle end of the locking plate. After the locking device moves backward, the push plate The pushing and limiting of the bent plate is released, and the bent plate is rotated and reset under the action of the reset member, and the locking arm on the transmission shaft is stopped and limited, and the reset member is arranged on the bracket.

An input crank arm is arranged on the transmission shaft, and the input crank arm forms the power input end.

The interlocking plate is V-shaped, the hinge part is provided with a long groove, and the end of the transmission arm away from the transmission shaft is provided with a sliding part, and the sliding part is located in the long groove and can be driven by the transmission shaft. Slide down the length of the slot.

The long groove is a long through groove penetrating along the left and right directions, and the sliding part is formed by a pin shaft arranged on the transmission arm.

The bracket is also provided with a lock stop shaft whose axis is parallel to the rotation axis of the interlock plate, and the lock stop shaft is used to limit the rotation of the interlock plate when the valve is in the open position.

The interlocking plate includes an interlocking plate body, and the interlocking plate body is provided with a protrusion, and the protruding direction of the protrusion is perpendicular to the rotation axis direction of the interlocking plate, and the protrusion forms the locking tongue.

The locking plate includes a locking plate body extending along the front and rear directions, and a protruding section extending leftward or rightward is provided on the front end of the locking plate body, and the protruding section forms the locking end.

The curved plate includes a first plate arm and a second plate arm. The first plate arm and the second plate arm are arranged in a V shape. The stop end of the push plate is provided with an open groove. When the valve is in the open position, the second plate arm A part of the first plate arm is located in the opening slot, and when the valve is in the closed position, the second plate arm is rotated and reset under the action of the reset member to stop and limit the locking arm on the transmission shaft.

The reset member is a torsion spring arranged on the rotating shaft of the bent plate.

Beneficial effects of the present invention: when the interlocking device of the present invention is used on a specific switch cabinet, when the valve is in the open position, the latch end on the locking plate is hooked by the latch tongue on the interlocking plate and is limited. With the valve open, the middle door cannot be opened. When the valve is in the closed position, when the valve is about to close, the output motion is transmitted to the power input end, and the transmission shaft and the transmission arm are driven to rotate, which drives the interlocking plate to rotate at a certain angle. At this time, the interlocking plate has released the limit to the locking plate, the locking device is unlocked, and the middle door can move outwards and be opened. When the middle door has just been opened for a certain distance, the push plate no longer touches the pressing bent plate, and under the action of the reset part, the bent plate rotates to another position. If you try to open the valve, the locking arm will be blocked by the bent plate, and the action The force on the bent plate is parallel to the rotation axis of the bent plate, and the moment is always zero. Unless the bent plate is damaged, the transmission shaft will not rotate, that is, the valve cannot be opened. When the middle door is opened, the valve cannot be opened, that is, it must Close operation. The interlocking device of the present invention realizes the function that the valve cannot be opened when the middle door is opened on the basis of the prior art that the valve can only be opened by closing the valve, so as to prevent the valve from being opened by misoperation, which is safe and interlocking. higher.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the interlocking device of switchgear valve and middle door of the present invention (state one);

Fig. 2 is a structural schematic diagram of an embodiment of the interlocking device of the switchgear valve and the middle door of the present invention (state two);

Fig. 3 is a structural schematic diagram of an embodiment of the interlocking device of the switch cabinet valve and the middle door of the present invention (state 3).

Detailed ways

Embodiment of the interlocking device of switchgear valve and middle door of the present invention: as shown in Figure 1-3, this interlocking device comprises the transmission shaft 2 that axis extends along the left and right direction, support 9, locking device, and transmission shaft 2 has The power input end used to be connected with the output end of the valve is provided with a transmission arm 4 and a locking arm 3 which rotate together with it on the transmission shaft. An input crank arm 1 is arranged on the transmission shaft, and the input crank arm 1 forms the power input end.

An interlocking plate 5 is rotated on the support 9, the axis of rotation of the interlocking plate 5 is parallel to the axis of the transmission shaft 2, and a curved plate 7 is also hingedly connected on the support 9, and the hinge axis of the curved plate 7 and the support 9 is along the up-down direction. . The interlocking plate 5 is respectively provided with a hinged part 51 and a lock tongue part 52 on the front and rear sides of its rotation axis, and the hinged part 51 is movably connected with the transmission arm. The interlocking plate 5 is V-shaped, the hinge 51 is provided with a long groove, and the end of the transmission arm 4 away from the transmission shaft is provided with a sliding part, the sliding part is located in the long groove and can be driven by the transmission shaft along the length of the long groove. Slide lengthwise. The long groove is a long through groove penetrating along the left-right direction, and the sliding part is formed by a pin shaft 12 arranged on the transmission arm. The interlocking plate 5 includes an interlocking plate body, on which a protrusion is arranged, and the protruding direction of the protrusion is perpendicular to the rotation axis of the interlocking plate, and the protrusion forms the locking tongue. The bracket 9 is also provided with a lock stop shaft 6 whose axis is parallel to the rotation axis of the interlock plate 5, and the lock stop shaft is used to limit the rotation of the interlock plate 5 when the valve is in the open position.

The locking device includes a push plate 10 and a locking plate 11. The front end of the locking plate 11 is a snap end 13, and the front end of the pushing plate 10 is a stop end 16. The locking plate 11 includes a locking plate body extending in the front-rear direction, and the locking plate body The front end is provided with a leftward protruding section, which forms the locking end 13 . The rear ends of the locking plate 11 and the push plate 10 are all connecting ends for detachable connection with the middle door, which are respectively the upper connecting end 14 and the lower connecting end 15, and the upper and lower connecting ends are all formed by the connecting plate bent to the right. Formed, the upper and lower connecting ends are provided with bolt holes. When the connecting end of the locking plate 11 is in the open position of the valve, the locking end 13 and the deadbolt portion 52 limit the cooperation to block the backward movement of the locking plate 11, and the stop end 16 pushes and cooperates with the curved plate 7, and when the valve is closed, When in position, the locking tongue portion 52 of the interlocking plate 5 releases the limit to the buckle end 13 of the locking plate 11, and the push plate 10 releases the pushing limit to the bent plate 7 after the locking device moves backward, and the bent plate 7 Rotate and reset under the action of the reset member and stop the rotation and limit the locking arm on the transmission shaft. The reset member is the torsion spring 8 arranged on the bracket. The torsion spring 8 is arranged on the rotation axis of the bent plate.

The bent plate 7 includes a first plate arm 71 and a second plate arm 72. The first plate arm and the second plate arm are arranged in a V shape. The stop end 16 of the push plate 10 is provided with an open groove. When the valve is in the open position, A part of the first plate arm 71 is located in the opening slot. When the valve is in the closed position, the second plate arm 72 is rotated and reset under the action of the reset member to stop and limit the locking arm 3 on the transmission shaft.

When the interlocking device of the present invention is used on a specific switch cabinet, as shown in Figure 1, the valve is opened and the middle door is closed (the valve is in the open position), and the lock end 13 on the locking plate 11 is locked by the lock on the interlocking plate 5. The tongue 52 is hooked and limited. In addition, when trying to open the middle door, the locking plate 11 will have a tendency to move outwards, which will generate a counterclockwise torque on the interlocking plate 5, forcing the interlocking plate to rotate, but the interlocking plate 5 is locked by the blocking shaft 6 Blocked, unable to turn. With the valve open, the middle door cannot be opened. As shown in Figure 2, the valve is in the closed state and the middle door is in the closed state. When the valve is about to close, the output motion is transmitted to the input crank arm 1, which drives the transmission shaft 2 and the transmission arm 4 to rotate, and drives the interlocking plate 5 clockwise. Turn a certain angle. At this time, the interlocking plate 5 releases the limit to the locking plate 11, the locking device is unlocked, and the middle door can move outward and be opened. When the valve is opened from the state of Fig. 2, when the valve is just opened, the transmission arm 4 will rotate in the opposite direction to lock the locking plate 11. As shown in Figure 3, when the valve is closed and the middle door is open, when the middle door is just opened for a certain distance, the push plate 10 no longer contacts the pressing bent plate 7, and under the action of the return torsion spring 8, the bent plate rotates to the position shown in Figure 3. In the state shown, the bent plate 7 is located under the locking arm 3 . At this time, if an attempt is made to open the valve, the locking arm 3 will be blocked by the second arm 72 of the bent plate 7, and the force acting on the bent plate 7 is parallel to the rotation axis of the bent plate, and the moment is always zero unless the bent plate Otherwise, the transmission shaft will not rotate, that is, the valve cannot be opened, and when the middle door is opened, the valve cannot be opened, that is, the door must be closed for operation.

In other embodiments, the power input end on the transmission shaft can be formed by a part of the transmission shaft, not necessarily in the form of a crank arm, but also a disc coaxially arranged on the transmission shaft, and the disc is provided with an eccentric hole .

In other embodiments, the long slot on the interlocking plate may not be a through slot, but may be configured as a slot similar to an elongated blind hole; in addition, the sliding part may also be configured as a slider.

In other embodiments, the buckle end on the locking plate can also be replaced with a U-shaped groove or an annular groove arranged at the front end of the locking plate. In the U-shaped groove or ring groove of the plate to limit the backward movement of the locking plate.

In other embodiments, the locking plate and the push plate in the locking device can be integrally arranged and then connected to the middle door, or can also be arranged separately, and the locking plate and the push plate are independently connected to the middle door.

In other embodiments, the return member can also use other springs to replace the torsion spring in this embodiment, for example, a return spring is arranged on the bracket, one end of the return spring is fixed on the bracket, and the other end is connected to the second crank arm , when the valve is open, the return spring is stretched. When the valve is closed and the middle door is opened, when the push plate no longer pushes the limit bending plate, under the action of the back-moving spring, the bending plate resets and rotates.

Claims (9)

1. the interlock of switch cabinet shutter and middle door, it is characterised in that：The transmission shaft that extends in left-right direction including axis, branch Frame, locking device, the transmission shaft have the power intake being connect for the output terminal with valve, and the transmission shaft is equipped with Transmission arm, the lockup arm rotated therewith, is rotatably equipped with interlock plate on the stent, the pivot center of interlock plate with it is described The axis of transmission shaft is parallel, and being also articulated and connected on the stent is equipped with bent plate, the axis edge of the articulated shaft of the bent plate and stent Upper and lower directions extends, and the interlock plate is respectively equipped with articulated section, lock tongue portion, the articulated section in the front and rear sides of its pivot center It is flexibly connected with the transmission arm, the locking device includes push plate and lockplate, and the front end of the lockplate is latches end, institute The front end of push plate is stated as block end, the lockplate, push plate rear end be connecting pin for being connect with middle door, at valve When open position, lock end and lock tongue portion limiting coordinates to stop that lockplate moves backward, the block end with it is curved Plate pushing tow coordinates, and when valve is in close stance, the lock tongue portion of interlock plate releases the limiting to the lock end of lockplate, and push plate exists Locking device releases after moving backward limits the pushing tow of bent plate, and bent plate rotates reset under the action of return unit and to the biography Lockup arm on moving axis carries out rotation stop limiting, and the return unit setting is on the bracket.

2. the interlock of switch cabinet shutter according to claim 1 and middle door, it is characterised in that：It is set on the transmission shaft There is input connecting lever, the input connecting lever forms the power intake.

3. the interlock of switch cabinet shutter according to claim 1 and middle door, it is characterised in that：The interlock plate is in V Font, the articulated section are equipped with elongated slot, and one end of the separate transmission shaft of the transmission arm is equipped with sliding part, the sliding position In in the elongated slot and can under the driving of transmission shaft along the length direction of elongated slot slide.

4. the interlock of switch cabinet shutter according to claim 3 and middle door, it is characterised in that：The elongated slot is along a left side The long straight slot of right direction perforation, the sliding part are formed by the axis pin being set on transmission arm.

5. the interlock of switch cabinet shutter according to claim 3 and middle door, it is characterised in that：It is also set on the stent The locking gear shaft for having axis parallel with the pivot center of the interlock plate, the locking gear shaft are used for when valve is in open position Interlock plate rotation stop is limited.

6. the interlock of switch cabinet shutter according to claim 3 and middle door, it is characterised in that：The interlock plate includes Interlock plate ontology, the interlock plate ontology are equipped with protrusion, and raised protrusion direction is vertical with the pivot center direction of interlock plate, It is described to convex to form the lock tongue portion.

7. the interlock of switch cabinet shutter according to claim 6 and middle door, it is characterised in that：The lockplate includes The lockplate ontology extended along the longitudinal direction, the front end of lockplate ontology is equipped with the convex section towards a left side or towards right extension, described convex Go out section and form the lock end.

8. the interlock of the switch cabinet shutter and middle door according to claim 1 to 7 any one, it is characterised in that：Institute It states bent plate and includes the first plate arm, the second plate arm, the first plate arm, the second V-shaped arrangement of plate arm, the block end of push plate, which is equipped with, opens Mouth slot, when valve is in open position, a part for the first plate arm is located in the open slot, when valve is in close stance, Second plate arm rotates under the action of return unit to be resetted and carries out rotation stop limiting to the lockup arm on the transmission shaft.

9. the interlock of switch cabinet shutter according to claim 8 and middle door, it is characterised in that：The return unit is sets Torsional spring in the shaft of bent plate.