CN105161348B - Hand-in-hand line centrally-positioned wire-outgoing switchgear grounding switch blocking device, system and method - Google Patents

Abstract

The invention discloses a grounding switch locking device, system and method of a middle-mounted outlet cabinet for a hand-in-hand line. The grounding switch locking device includes an outer cover, one side of the outer cover is provided with a protruding baffle plate, and the other side is hinged to the installation base plate. An electromagnet is arranged on the installation base plate, and the electromagnet is provided with a switch button. The electromagnet is connected with the dead bolt. on the mounting base. When the high-voltage line is charged, the lock tongue is stuck in the slot, and the baffle is blocked at the operating port of the grounding switch of the central switch cabinet, and the grounding switch cannot be closed; when the high-voltage line is not charged, press the switch button and the electromagnet will be energized , the lock bolt is retracted, and the outer cover is opened, at this time the ground knife switch can be operated. The live display locking device has reliable contact, correct indication, and the locking is in place, and the installation is simple and easy, which greatly reduces the safety threat to the operation and maintenance personnel and meets the target requirements.

Description

Locking device, system and method for grounding switch of center-mounted outlet cabinet for hand-in-hand lines

technical field

The invention relates to an anti-misoperation safety device, in particular to a grounding switch locking device, system and method for a 10kV hand-in-hand line center-mounted outlet cabinet.

Background technique

The power line of the central cabinet adopts the "hand in hand" power supply mode, and when the circuit breaker in the central cabinet is at the test position, the outlet side may still be supplied with power from other substations. Before closing the grounding switch, it must be ensured that there is no electricity on the outlet side. At present, there are many types of high-voltage switchgears on the market, and most of them adopt comprehensive anti-misoperation locking, and the locking method is relatively perfect. However, there are still a small number of high-voltage switchgears whose locking measures are not perfect enough to fully meet the requirements of the "five defenses", posing serious potential safety hazards. This hidden danger has been a persistent problem for many years. Mechanical "five-proof" locks and microcomputer locks cannot solve this problem very well. When installing the lock device in the existing lock device, it needs to be installed in a power outage, which affects the reliability of power supply and increases the power outage time. It is easy to cause customers dissatisfaction. Accidents of electrified and grounded knife switches occur from time to time in power production. This problem has always been regarded as one of the hidden dangers of power safety production. The resulting misoperation caused power grid outages, casualties, and brought immeasurable losses to the country. .

Contents of the invention

The purpose of the present invention is to solve the above problems, to provide a grounding switch locking device, system and method for the middle-mounted outlet cabinet of the hand-in-hand line, which can automatically detect the electricity of the power transmission and transformation line, and forcibly lock the grounding switch on the line side when the line is electrified. It is used to eliminate the accident of mistakenly closing the grounding switch of the central outlet cabinet and prevent the loophole of the five-proof program lock from being empty.

In order to achieve the above object, the present invention adopts the following technical solutions:

The grounding switch locking device includes an outer cover. One side of the outer cover is provided with a protruding baffle, and the other side is hinged with the installation base. The installation base is provided with an electromagnet, and the electromagnet is provided with a control device The switch button for power on and off, the electromagnet is connected with the lock tongue, the electromagnet can drive the lock tongue to move, the outer cover is provided with a card slot, and the lock tongue can be stuck in the card slot so that the outer cover The cover is covered on the installation base plate.

A lock is connected to one side of the outer cover, and a lock nose is provided on the installation bottom plate.

A lock nose is connected to one side of the outer cover, and a lock catch is provided on the installation base plate. Locking through the locking nose with a common lock also prevents the opening of the outer cover.

The end face of the dead bolt is a slope.

The inclination angle of the end face of the deadbolt is within the range of [10°, 90°).

Preferably, the inclination angle of the end surface of the lock tongue is 45°. When the outer cover is turned around the hinge point, the cover is placed on the installation base plate, and the lock tongue is inserted into the slot, so that the outer cover cannot be opened.

The mounting base plate is provided with a plurality of mounting holes. The installation bottom plate is installed on the central cabinet.

A handle is provided on the baffle. Easy to open the cover.

The locking system using the grounding switch locking device includes a high-voltage charging sensor, the high-voltage charging sensor is connected to a high-voltage line, the high-voltage charging sensor is connected to a charging display device, and the charging display device is connected to the electromagnet of the grounding switch locking device connect. The charged display device displays the live status of the high-voltage circuit bus where the switchgear is located.

The locking method of the locking system. When the high-voltage line is charged, the high-voltage charging sensor sends the charging information to the charging display device. The cover is on the installation base plate, and the baffle is blocked at the operating port of the grounding switch of the central switch cabinet. The baffle cannot be opened, the operating handle cannot be inserted for operation, and the grounding switch cannot be closed;

When the high-voltage line is not electrified, the contacts of the electrified display device are closed, the electromagnet power supply is connected, and the switch button is pressed, the electromagnet is energized, the electromagnet is closed, the latch tongue is retracted, and the outer cover is opened, so that the baffle cannot connect the grounding knife Block the gate operation port, and then insert the knife switch operating handle to operate the grounding knife switch.

The hand-in-hand line is a dual power supply that supplies power to one line. One end is overhauled and the other end is powered. As long as it is the case of multiple power supplies on one line, the present invention is applicable.

Beneficial effects of the present invention:

The grounding switch locking device of the present invention is easy to install, and can be installed without power failure without affecting normal power supply.

The present invention has double locks, which have double guarantees. One is the commonly used five-proof lock to lock the lock nose and buckle, and the other is locked by the bolt driven by the electromagnet. When the outer cover needs to be opened, the commonly used five-proof lock must be opened at the same time. Cam with anti-lock and electromagnet.

The electromagnet of the present invention is arranged inside the outer cover, which can effectively wrap the electromagnet in it, does not affect the appearance of the switchgear, and has the characteristics of preventing accidental touch and corrosion of dust and air.

The live display locking device has reliable contact, correct indication, and the locking is in place, and the installation is simple and easy, which greatly reduces the safety threat to the operation and maintenance personnel and meets the target requirements.

Description of drawings

Fig. 1 is the front view of the grounding switch locking device;

Figure 2 is a schematic diagram of the appearance structure of the grounding switch locking device with the outer cover closed on the installation base;

Fig. 3 is the structural representation of dead bolt;

4 is a schematic structural view of a charging display device;

Figure 5 is a schematic diagram of the overall connection of the locking system;

Among them, 1. card slot, 2. lock bolt, 3. lock nose, 4. electromagnet, 5. switch button, 6. lock buckle, 7. bezel, 8. outer cover, 9. hinge shaft, 10. installation Base plate, 11. indicator light, 12. handle, 2.1 slope.

detailed description

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

As shown in Figures 1-2, the grounding switch locking device includes an outer cover 8, the left side of the outer cover 8 is provided with a protruding baffle 7, and the right side is hinged with the installation base plate 10 through a hinge shaft 9, and the outer cover 8 can Rotate around the hinged shaft 9, that is, rotate relative to the installation base plate 10, the installation base plate 10 is provided with an electromagnet 4, the electromagnet 4 adopts a DC 12V electromagnet, and the electromagnet 4 is provided with a switch button 5 for controlling its power on and off , the electromagnet 4 is connected with the lock tongue 2, the electromagnet 4 can drive the lock tongue 2 to move, the outer cover 8 is provided with a card slot 1, and the lock tongue 2 can be stuck in the card slot 1 so that the outer cover 1 is covered on the installation base plate 10 .

A lock 6 is connected to the underside of the outer cover 8 , and a lock nose 3 is provided on the installation base 10 . Utilize common five anti-program locks to pass through lock nose 3 and lock, also can make outer cover 8 can't be opened. The mounting base 10 is provided with a plurality of mounting holes. The base plate 10 is installed on the middle cabinet. A handle 12 is provided on the baffle 7 . Easy to open the cover.

As shown in Figure 3, the end face of the deadbolt 2 is an inclined plane 2.1. Preferably, the inclination angle of the end surface of the deadbolt 2 is 45°. When the outer cover 8 is turned around the hinge shaft 9, the cover is placed on the installation base 10, and the deadbolt 2 is snapped into the slot 1, so that the outer cover 8 cannot be opened.

The locking system that adopts the grounding switch locking device includes a high-voltage charged sensor. In this embodiment, a capacitive sensor is used. The electromagnet connection of the device. As shown in Fig. 4, if the charged display device monitors the signal of the voltage on the capacitive sensor connected to the power distribution line, it means that there is power on the line. It can clearly indicate the three-phase charging situation, and there are three indicator lights 11 on it, which respectively indicate whether the three phases A, B, and C are charged. When the lights are on, it means that the line is charged.

The locking method of the locking system, when the high-voltage line is charged, the high-voltage charging sensor sends the charging information to the charging display device, the contact of the charging display device is disconnected, the electromagnet 4 loses power, the lock tongue 2 is stuck in the card slot 1, and the outer cover 8 Covered on the installation base plate 10, the baffle 7 is blocked at the operating port of the grounding switch of the central switch cabinet, the baffle 7 cannot be opened, the operating handle cannot be inserted for operation, and the grounding switch cannot be closed;

When the high-voltage line is not electrified, the contacts of the electrified display device are closed, the electromagnet 4 is powered on, and the switch button 5 is pressed, the electromagnet 4 is energized, the electromagnet 4 is closed, the lock bolt 2 is retracted, and the outer cover 8 is opened, so that the baffle 7, the grounding knife switch operation port cannot be blocked, and then the knife switch operating handle is inserted to operate the grounding knife switch.

When the circuit breaker is in the test position, when there is power on the line side, the charging display device shows that there is power and a forced lock is issued, the outer cover 8 is locked by the deadbolt, and the baffle 7 is blocked at the grounding switch operation port of the central switch cabinet, grounded The switch won't close.

When the circuit breaker is in the test position, only when there is no electricity on the line side, and the charged display device is powered and normal, and the electromagnet is powered and normal, after opening the five-proof program lock, press and hold the switch button 5, and open the outer cover 8. close the grounding switch. Any failure or loss of power of the electrified display device or the electromagnet 4 cannot carry out the closing operation. "Normal" here refers to the safe and reliable operation of the interval equipment, supplying power to the line, and the live display device showing that there is power, which is normal operation. When the interval equipment is overhauled, the interval equipment is powered off and safety measures are taken. If the electrification display device shows that there is electricity, it is abnormal, indicating that some equipment is electrified, and safety measures cannot be arranged (the grounding switch cannot be closed), and maintenance operations cannot be carried out. Judging whether it is normal depends on the running status of the device.

Blocking the grounding knife switch is to use the baffle plate on the outer cover of the locking device to block the operation port of the grounding knife switch, so that it cannot be inserted into the operating handle for operation. The working principle of the five-proof program lock is to stipulate the operation sequence of the circuit breaker, circuit breaker handcart and grounding knife switch in this interval. When the line is powered, it cannot be locked. The grounding switch locking device of the present invention is mainly for the line side. When there is power, the grounding knife switch is locked to prevent operation accidents. Do not carry out equipment operation according to the rules and regulations, and the five anti-program locks cannot be opened, so the outer cover 8 of the grounding switch locking device will also be unable to open and lock. Therefore, the deadbolt 2 of the five-proof program lock and the locking electromagnet locks the outer cover 8 of the grounding switch locking device together. Only when the two locking conditions are all qualified, the outer cover 8 of the grounding switch locking device can be opened, and can be opened after opening. Insert the operating handle to operate the grounding switch.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (8)

1. the blocking method of circuit middle outgoing line cabinet earthed switch block sytem of handing in hand, is characterized in that, block sytem includes Electrification in high voltage sensor, the electrification in high voltage sensor is connected on high-tension line, and electrification in high voltage sensor shows dress with powered Connection is put, the charged display device is connected with the electric magnet of grounding switch locking device；Grounding switch locking device includes outer Lid, the side of the enclosing cover is provided with the baffle plate of protrusion, and opposite side is hinged with mounting base, and the mounting base is provided with electromagnetism Ferrum, the electric magnet is provided with the shift knob for controlling its energization power-off, and the electric magnet is connected with dead bolt, and the electric magnet can Dead bolt movement, outer the covering is driven to be provided with draw-in groove, the dead bolt can be stuck in draw-in groove so that the enclosing cover is covered in the installation On base plate；

When high-tension line is powered, electrification in high voltage sensor will give charged display device with electrical information, and charged display device connects Point disconnects, and the electric magnet dead electricity, dead bolt is stuck in draw-in groove, and enclosing cover is covered on mounting base, and baffle plate is kept off in intermediate switchgear cabinet At grounding switch gathering hole, it is impossible to open baffle plate, it is impossible to which insertion operation handle is operated, it is impossible to close grounding switch；

When high-tension line is not charged, the junction closure of charged display device connects electromagnet power supply, pins shift knob, electromagnetism Tie Tong electricity, electromagnetic actuation, dead bolt withdraws, and opens enclosing cover, and grounding switch gathering hole cannot be blocked, then inserted by such baffle plate Entering switch operation handle carries out the operation of grounding switch.

2. blocking method as claimed in claim 1, is characterized in that, the side of the enclosing cover is connected with lock, the mounting base It is provided with lock nose.

3. blocking method as claimed in claim 1, is characterized in that, the side of the enclosing cover is connected with lock nose, the mounting base It is provided with lock.

4. blocking method as claimed in claim 1, is characterized in that, the end face of the dead bolt is inclined-plane.

5. blocking method as claimed in claim 4, is characterized in that, the angle of inclination of the dead bolt end face [10 °, 90 °) it is interval In the range of.

6. the blocking method as described in claim 4 or 5, is characterized in that, the angle of inclination of the dead bolt end face is 45 °.

7. blocking method as claimed in claim 1, is characterized in that, the mounting base is provided with multiple installing holes.

8. blocking method as claimed in claim 1, is characterized in that, the baffle plate is provided with handle.