CN205645604U - High tension switchgear prevents mistake operating means - Google Patents

Abstract

The utility model discloses a high tension switchgear prevents mistake operating means, it including the handle hole that is used for isolator and earthing switch divide -shut brake gang operated, be used for controlling mobilizable shielding plate, vacuum circuit breaker and isolator and earthing switch interlocking device, cabinet door and isolator and earthing switch interlocking device and earthing switch and cabinet door interlocking device that the handle hole was opened and close. Should prevent that mistake operating means can prevent reliably that vacuum circuit breaker, isolator and earthing switch's branch closing operation and high tension switchgear door on -off operation's mistake from moving, ensured to operate safe and reliable, and simple structure has, occupation space is little, does not increase the high tension switchgear volume, moreover advantage such as easy and simple to handle.

Description

A high-voltage switch cabinet anti-misoperation device

technical field

The utility model relates to the technical field of misoperation prevention for high-voltage electrical equipment, in particular to a misoperation prevention device for a high-voltage switch cabinet.

Background technique

The high-voltage switchgear for power supply and distribution equipment is mainly composed of vacuum circuit breakers, disconnectors, grounding switches and other operating components, as well as measurement and protection components such as transformers to form a power supply circuit. During the operation and maintenance of high-voltage electrical equipment, the operation may cause serious safety accidents. In this regard, the "Regulations on the Management of Electrical Misoperation Prevention Devices" issued by the former Ministry of Energy (Energy Security (1990) No. 1110) clearly requires that all electrical equipment that may cause misoperations should be installed with anti misoperation devices. The anti-mistake device should realize the following functions (abbreviated as five preventions): (1) Prevent mis-opening and mis-closing of the circuit breaker; (2) Prevent the disconnector from being pulled and closed under load; ) Prevent the ground wire switch from closing the circuit breaker isolating switch; In order to ensure the personal safety of operators and the normal operation of the cabinet, the basic requirements for the switchgear are: when the switchgear is in operation, the door of the switchgear is not allowed to be opened, only when the circuit breaker is off, the isolating switch is off and Grounding, the cabinet door is allowed to be opened only after the grounding is in place; secondly, the isolation/grounding switch can be operated only after the circuit breaker is opened, and the circuit breaker can be closed only after the isolation/grounding switch is fully opened and closed.

The traditional technical means are: a single switchgear itself adopts mechanical interlocking or electrical interlocking or a combination of the two interlocking methods, while electrical interlocking is used between the upper and lower level switchgears and the same level of switchgear, and electrical interlocking is used between the upper and lower level switchgears. Less reliable.

Patent ZL03209375.6 discloses a new type of mechanical interlock operating mechanism for high-voltage switchgear. The operating mechanism of each isolating switch and grounding switch is a labor-saving mechanism composed of gears. Board control, realizing the two functions of interlocking and operation. It is mainly composed of cylindrical gear and cycloidal pin wheel (for large-capacity switches), reducer, interlocking plate, conversion handle, bracket, base, etc. The manual operation handle is inserted into the input shaft, and the torque is amplified by the reducer and then transmitted to the output shaft for operation. Isolating switch, grounding switch; after the operation is in place, the cam on the output shaft controls the interlocking plate, so that the interlocking plate can only act according to the set program, and the interlocking plate controls the input shaft hole of the operating mechanism, so that the isolating switch And the grounding switch can only be operated according to the set procedure.

Patent ZL200720008971.6 discloses an interlocking device in the operating mechanism of a switching device, which includes: a mounting plate, which is provided with two holes for the first operating rod; an interlocking plate, which can be assembled and installed by sliding left and right plate, wherein the interlocking plate is provided with two second operating rod through holes, the distance between the two second operating rod through holes is not equal to the distance between the two first operating rod through holes, the second operating rod through The hole can be selectively aligned with the first operating rod through hole; two micro switches are located on the mounting plate and are respectively located on the left and right sides of the interlocking plate; a V-shaped block is fixedly installed on the mounting plate, wherein the V-shaped block has V-shaped groove; a sliding part, which can be slidably assembled on the interlocking plate up and down and protrudes under the interlocking plate, wherein the sliding connection relationship is formed between the lower end of the sliding part and the V-shaped surface of the V-shaped groove; and a Elastomer, which connects the slide and interlocking plates. These mechanical interlocking device mechanisms are all very complicated, and there are many parts and components, high manufacturing requirements, poor reliability, and inflexible operation, which cannot be used to lock each operation process with a padlock according to special needs.

Invention patent ZL201210007824.2 discloses a five-proof system for high-voltage switchgear, which includes interlocking mechanisms for circuit breakers and Gree switches, interlocking mechanisms for isolating switches and grounding switches, interlocking mechanisms for grounding switches and circuit breakers and isolating switches, and interlocking mechanisms for isolating switches and The lower door interlock mechanism, the grounding switch and the lower door interlock mechanism are five parts. Although it can realize the interactive interlocking of the isolating switch, the circuit breaker, and the grounding switch to ensure that the operation procedure is correct and the operation is successful, the operation procedure is incorrect and the operation is unsuccessful. Its structure is complex, there are many components, it takes up a lot of space, and it brings a lot of inconvenience to the internal maintenance of the high-voltage cabinet.

Utility model content

The problem to be solved by the utility model is to provide a high-voltage switch cabinet anti-misoperation device, which can reliably prevent the opening and closing operation of the vacuum circuit breaker, the isolating switch and the grounding switch and the misoperation of the opening and closing operation of the switch cabinet door. Ensure safe operation, and simple structure, easy to operate.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-voltage switch cabinet anti-misoperation device, including an operation hole for the coaxial operation of the isolating switch and the grounding switch, and is used to control the operation The movable shielding plate for the opening and closing of the hole, the interlocking mechanism of the vacuum circuit breaker and the isolating switch and the grounding switch, the interlocking mechanism of the cabinet door and the isolating switch and the grounding switch, and the interlocking mechanism of the grounding switch and the cabinet door.

The interlocking mechanism of the vacuum circuit breaker, the isolating switch and the grounding switch has a limit stop arm in contact with one end of the shielding plate, and the limit stop arm is hingedly connected to the output shaft of the vacuum circuit breaker through a crank arm.

The interlocking mechanism of the cabinet door and the isolating switch and the grounding switch includes two sets of locking components respectively arranged on the upper and lower sides of the shielding plate, which are respectively used for interlocking the middle door and the lower door with the isolating switch and the grounding switch.

The locking assembly has a support fixedly connected to the inner wall of the switch cabinet, the support is hinged with a lock hook through a pin, a push plate is arranged on one side of the lock hook, and a torsion spring for pressing the lock hook is worn on the pin.

The grounding switch and the interlocking mechanism of the cabinet door have two lock plates respectively connected to the middle and lower cabinet doors and a lock bar clamped with the lock plate. At least two annular grooves are arranged on the lock bar. Open slot for locking bar fit.

The locking lever is hinged with a driving lever connected with the output shaft of the output crank arm of the grounding switch, and is used to toggle the locking lever to move axially.

The shielding plate is provided with an operation window and several slotted holes, and is connected with the inner wall of the crossbeam between the middle door and the lower door of the switch cabinet through guide bolts.

The operating end of the operating shaft for the opening and closing operation of the isolating switch and the grounding switch is provided with an opening and closing limit sleeve. A linkage pin that cooperates with the limit groove or the limit hole.

The beneficial effects of the utility model are:

1) The anti-misoperation device of the high-voltage switchgear of the utility model can reliably prevent the opening and closing operation of the vacuum circuit breaker, the isolating switch and the grounding switch and the misoperation of the high-voltage switchgear door switch operation, ensuring safe and reliable operation;

2) The anti-misoperation device adopts the operating hole with a shielding plate inside the operating hole and the coaxial operation of the isolating switch and the grounding switch connected to it, and a movable shielding plate for controlling the opening and closing of the operating hole. , vacuum circuit breaker and isolating switch and grounding switch interlocking mechanism, cabinet door and isolating switch and grounding switch interlocking mechanism and grounding switch The switch and the cabinet door operating mechanism are organically combined, so the structure is simple, the space occupied is small, the volume of the high-voltage switch cabinet is not increased, and the operation is easy;

3) The opening and closing limit sleeve is set at one end of the operating shaft, and two limit grooves or limit holes are radially opened on the circumference of the open and close limit sleeve. The linkage pin shaft matched with the bit hole, so that if the isolation/earth switch opening/closing operation is in place and the operating handle is pulled out during use, one of the limit slots or limit holes corresponds to the position of the linkage pin shaft, and the shielding plate can Move to the right, at this time, the closing operation of the vacuum circuit breaker can be performed; if the opening/closing operation of the isolation/grounding switch is not in place, or the operating handle is not pulled out, the limit groove and the linkage pin cannot be matched correspondingly, and the blocking plate If it cannot move to the right, the closing operation of the vacuum circuit breaker cannot be performed at this time. This structure realizes the interlocking of the vacuum circuit breaker, the isolating switch and the grounding switch.

Description of drawings

Below in conjunction with accompanying drawing, the utility model will be further described:

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is a schematic diagram of another structure of the utility model embodiment;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is a schematic structural diagram of Embodiment 2 of the utility model.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Embodiment one

As shown in Figure 1, Figure 2, and Figure 3, the high-voltage switchgear used in the power system is usually composed of the cabinet and the operating components such as vacuum circuit breakers, isolating switches, and grounding switches installed inside. 1, middle door 8 and lower door 6 three cabinet doors, and crossbeam 1 is arranged between middle door 8 and lower door 6.

The anti-misoperation device described in the utility model includes: an operating hole for the coaxial operation of the isolating switch and the grounding switch, a movable shielding plate 3 for controlling the opening and closing of the operating hole, a vacuum circuit breaker and The interlocking mechanism of isolating switch and grounding switch, the interlocking mechanism of cabinet door and isolating switch and grounding switch, and the interlocking mechanism of grounding switch and cabinet door.

The operation hole is opened on the crossbeam 1, corresponding to the opening and closing operation shaft 4 of the disconnector and the grounding switch, and a special operation handle can pass through the operation hole and be connected with the operation end of the operation shaft 4 for rotation operation , to realize the opening or closing of the isolating switch or/and the grounding switch.

Among them, the opening and closing coaxial operating mechanism of the isolating switch and the grounding switch can adopt the anti-misoperation mechanism applied by the applicant in another case. The mechanism includes an isolating switch operating mechanism and a grounding switch operating mechanism. The isolating switch operating mechanism and the grounding switch operating mechanism respectively include a driven plate set on the output shaft of the output crank arm and a dial for driving the driven plate. The two dials Installed on the operating shaft 4 in sequence, the interlocking and coaxial operation of the opening and closing of the isolating switch and the grounding switch can be realized.

The shielding plate 3 is arranged on the inner side of the crossbeam 1, on which an operation window 5 and a plurality of slotted holes 7 are arranged, and is connected with the inner wall of the crossbeam 1 between the middle door 8 and the lower door 6 of the high-voltage switch cabinet through a guide bolt 9, The shielding plate 3 can move freely along the length direction of the beam. During use, the operator can move the shielding plate 3 through the operation window 5, and make the operation window 5 correspond to the position of the operation hole, so as to open/close the isolating switch and the grounding switch.

The interlocking mechanism of the vacuum circuit breaker, the isolating switch and the grounding switch has a limit arm 2 which is in contact with the left end of the shielding plate 3, and the limit arm 2 is hinged to the output shaft 10 of the vacuum circuit breaker through a crank arm 11 Connection, its hinge shaft is connected with the inner wall of the high voltage switchgear. During the closing operation of the vacuum circuit breaker, its output shaft 10 is lifted upwards, driving the limit arm 2 to rotate counterclockwise. After the circuit breaker is closed, its output shaft 10 is at a high position, and the limit arm 2 pushes the shielding plate 3 to the dead point position at the right end to block the operation hole, and the shielding plate 3 cannot be pulled to the left, and the operating handle is naturally It cannot be inserted, thereby ensuring that the disconnecting/earthing switch cannot be operated after the vacuum circuit breaker is closed. And only when the vacuum circuit breaker is opened, along with the reset of the output crank arm of the vacuum circuit breaker, the free end of the limit arm 2 turns clockwise to the left dead point position, and the obstruction of the blocking plate 3 is released, and the operator can pull it by hand. The movable shielding plate 3 moves left to the left dead point, so that the operation window 5 corresponds to the position of the operation hole, and now the operating handle can be inserted to carry out the opening/closing operation of the isolating switch and the grounding switch. At the same time, because the insertion of the operating handle hinders the rightward movement of the shielding plate 3, the free end of the limit stop arm 2 will also be limited to the left dead point position, that is, the closing of the vacuum circuit breaker is blocked.

The interlocking mechanism of the cabinet door and the isolating switch and the grounding switch includes two sets of locking components symmetrically arranged on the upper and lower sides of the shielding plate 3, which are respectively used for the interlocking of the middle door 8 and the lower door 6 with the isolating switch and the grounding switch , the locking assembly has a support 12 fixedly connected to the inner wall of the switch cabinet, the support 12 is hinged with a lock hook 13 through a pin 14, and one side of the lock hook 13 is integrally provided with a push plate 21 arranged in a T shape with the lock hook 13 , The pin 14 is equipped with a torsion spring 15, and the two free ends of the torsion spring 15 abut against the locking hook 13 and the support 12 respectively, and are used for pressing the locking position of the locking hook 13. Due to the action of the torsion spring 15, the locking hook 13 is in the position of limiting the leftward movement of the shielding plate 3 without external force. The gate operation implements locking; and during the closing of the middle door 8 or the lower door 6, its inner wall contacts and pushes the push plate 21 to make the lock hook 13 rotate clockwise around the pin 14, and removes its restriction on the leftward movement of the shielding plate 3. Therefore, after the middle door 8 and the lower door 6 are closed, the shielding plate 3 can be pulled to move to the left to remove the blocking of the operation hole, and the opening and closing operation of the isolating switch and the grounding switch are unlocked. If the middle door 8 or/and the lower door 6 are not closed, because the lock hook 13 hooks the shielding plate 3, it cannot move left and limit the operating handle to insert and operate. After locking hook 13 is because of the closing of middle door 8 and lower door 6, removes the restriction to shielding plate 3 to move to the left, just can move leftwards shielding plate 3 this moment, insert operating handle and carry out the opening and closing operation of isolating switch and earthing switch.

The grounding switch and the cabinet door interlocking mechanism have two lock plates 17 connected to the inner walls of the middle and lower cabinet doors 8 and 6 respectively and a lock bar 16 connected to the lock plate 17, and at least two annular grooves are arranged on the lock bar 16 18. The lock plate 17 is provided with an open groove 22 that matches the lock rod 16. The bottom of the open groove 22 is a circular hole slightly larger than the diameter of the lock rod 16, and the width between the two side walls of the mouth is slightly larger than the annular groove 18. Part bottom diameter. The locking lever 16 is hinged with a driving lever 20 connected to the output shaft of the output crank arm 19 of the grounding switch, and is used to toggle the axial movement of the locking lever 16 . After the grounding switch is closed, the annular groove 18 of the lock bar 16 can be disengaged from the groove because it is located at the lock plate 17, and the middle door 8 and the lower door 6 can be opened after being unlocked; and the grounding switch is not closed or closed. When in place, the lock bar 16 cannot escape from the opening groove 18 because its annular groove 18 is not at the lock plate 17, and the middle door 8 and the lower door 6 cannot be opened due to interlocking, so that the anti-misoperation locking that cannot be opened when the power is charged is realized. Prevent operators from entering live compartments.

Embodiment two

Referring to Fig. 4, as a further improvement, an opening and closing limit sleeve 23 can be arranged at the operating end of the operating shaft 4, and two limit grooves 24 are radially opened on the side of the opening and closing limit sleeve 23, so that A linkage pin 25 that can cooperate with the limit groove 24 is fixedly installed on the shielding plate 3, and the linkage pin 25 moves together with the shielding plate 3. Of course, the linkage pin 25 can also be installed on the shielding plate 3 through the connecting seat 26. On, can adjust the length that linkage pin shaft 25 stretches out like this, use more convenient. During use, if the opening/closing operation of the isolating/grounding switch is in place and the operating handle is pulled out, one of the limit slots 24 corresponds to the position of the linkage pin 25, and the shielding plate 3 can move to the right. Closing operation of the vacuum circuit breaker; if the opening/closing operation of the isolation/earth switch is not in place, or the operating handle is not pulled out, the limit groove 24 and the linkage pin 25 cannot be matched correspondingly, and the shielding plate 3 cannot move to the right. At this time, the closing operation of the vacuum circuit breaker cannot be performed; thus, the interlocking of the vacuum circuit breaker, the isolating switch and the grounding switch is realized.

Although the preferred embodiments of the present invention have been described above to illustrate the principles and applications of the present invention, it should be understood that the present invention can be implemented in other ways without departing from these principles.

Claims (8)

1. an anti-misoperating device for high-voltage switch cubicle, it is characterised in that: it includes for disconnecting switch and earthed switch deciliter The handle hole of lock gang operated, for controlling moveable shutter, vacuum circuit breaker that described handle hole opens and closes and keeping apart Close and earthed switch interlocking mechanism, cabinet door and disconnecting switch and earthed switch interlocking mechanism and earthed switch and cabinet couplet on the door lock machine Structure.

2. anti-misoperating device for high-voltage switch cubicle as claimed in claim 1 a kind of, it is characterised in that: described vacuum circuit breaker with Disconnecting switch and earthed switch interlocking mechanism have the spacing blocking arm touched with described shutter one end, and this spacing blocking arm is by turning Arm is articulated and connected with the output shaft of vacuum circuit breaker.

3. anti-misoperating device for high-voltage switch cubicle as claimed in claim 1 a kind of, it is characterised in that: described cabinet door with keep apart Close and earthed switch interlocking mechanism includes being respectively arranged at the 2 of position, described shutter upper and lower both sides and overlaps locked components, use respectively Yu Zhongmen and Xiamen and disconnecting switch and the interlocking of earthed switch.

4. a kind of anti-misoperating device for high-voltage switch cubicle as claimed in claim 3, it is characterised in that: described locked component has Fixing, with switch cubicle inwall, the bearing being connected, bearing has latch hook by pin-hinges, and the side of latch hook arranges push pedal, and pin is worn Equipped with the torque spring for compressing latch hook.

5. a kind of anti-misoperating device for high-voltage switch cubicle as claimed in claim 3, it is characterised in that: described earthed switch and cabinet Door interlocking mechanism have respectively with in, 2 jam plates being connected of lower cabinet door and the locking bar with jam plate clamping, locking bar arranges at least 2 Individual cannelure, described jam plate arranges the open slot coordinated with locking bar.

6. anti-misoperating device for high-voltage switch cubicle as claimed in claim 5 a kind of, it is characterised in that: described locking bar be hinged with The driving lever that the output shaft of earthed switch output toggle arm is connected, is used for stirring locking bar and is allowed to move axially.

7. a kind of anti-misoperating device for high-voltage switch cubicle as described in claim 1 or 3, it is characterised in that: described shutter sets Put action pane and some long slot bores, and be connected with crossbeam inwall between door with Xiamen in switch cubicle by guide blot.

8. an anti-misoperating device for high-voltage switch cubicle, it is characterised in that: it includes for disconnecting switch and earthed switch deciliter The handle hole of lock gang operated, for controlling moveable shutter, vacuum circuit breaker that described handle hole opens and closes and keeping apart Close and earthed switch interlocking mechanism, cabinet door and disconnecting switch and earthed switch interlocking mechanism and earthed switch and cabinet couplet on the door lock machine Structure；The operating side of the operation axle of disconnecting switch and earthed switch opening/closing operation mechanism arranges divide-shut brake stop collar, this divide-shut brake Stop collar week, side was provided with stopper slot or spacing hole, and described shutter arranges the set bar that can coordinate with stopper slot or spacing hole Axle.