CN206546789U - The anti-powered conjunction earthing knife-switch blocking device of one kind - Google Patents

Abstract

The utility model provides an anti-static ground knife locking device, which comprises: a vehicle entry and exit hole, a locking electromagnet, a vehicle body, a ground knife manual operation hole, a grounding knife spring, a live display, a secondary latch locking push plate, and a grounding knife , sensor, contact arm, plum blossom contact, primary valve push plate, grounding bar, auxiliary switch, secondary latch, test power supply, electrometric lock, observation window, grounding knife switch position indicator light, buzzer, five-proof lock, The static contact of the grounding knife and the moving contact of the grounding knife. The utility model solves the problem of whether the switchgear can prevent the electrified closing knife when the switchgear is turned over for maintenance, can improve the reliability of equipment operation, and especially greatly reduce the operation safety risk of operating personnel. Compared with the current grounding handcart and electric inspection handcart, it has the characteristics of light weight, low cost, more complete functions, safer and more reliable operation. Through the five anti-blocking functions of electricity, electromagnetic and microcomputer, it can prevent the occurrence of accidents caused by live wire hanging to the ground wire.

Description

An anti-static ground knife locking device

technical field

The utility model belongs to the technical field of substation safety protection devices, in particular to a locking device for an anti-electricity closing knife.

Background technique

With the continuous development of power technology, 6-35kV equipment is generally replaced by metal armored cabinets under current circumstances. For the same voltage level of busbars, how to prevent electrification and grounding is a major problem that has plagued the operation and management units for a long time. The existing electric inspection and grounding handcarts for the busbar maintenance of switch cabinets are two independent handcarts, which do not have the function of preventing misoperation between the electric inspection and grounding operations, and lack safety and reliability. Therefore, improving the convenience, safety and reliability of the electrical inspection and grounding of the busbar work of the switchgear is an urgent problem to be solved to improve the operation and management level of the power system.

Utility model content

The purpose of the utility model is to solve the problem of whether the switchgear can be anti-charged and grounded when the switchgear is turned over for maintenance, and to prevent the occurrence of accidents caused by the charged ground wire through the setting of five anti-locks.

The technical scheme of the utility model is:

An anti-static ground knife locking device, comprising: car entry and exit hole, locking electromagnet, car body, ground knife manual operation hole, grounding knife spring, charged display, secondary latch locking push plate, grounding knife, sensor, contact arm , plum blossom contact, primary valve push plate, grounding bar, auxiliary switch, secondary latch, test power supply, electrometric lock, observation window, grounding knife switch position indicator light, buzzer, five-proof lock, grounding knife static contact and the grounding knife moving contact;

The entry and exit hole is used to push in and pull out the electric test grounding handcart, and the electric locking of the operation hole of the entry and exit handcart and the operation hole of the grounding part is controlled by the locking electromagnet, and the handcart body is used to make each component; The ground knife manual operation hole is a manual opening and closing grounding knife switch, which can control the opening and closing of the grounding movable contact through the grounding knife spring; the charged display can display whether there is voltage in the three-phase busbar during inspection; the grounding knife can be used to check whether the busbar is grounded; the sensor It can sense whether there is voltage in the three-phase busbar, provide induction voltage for the live display, connect and fix the moving contact and sensor through the contact arm, the plum blossom contact is used to contact the static contact of the cabinet; the primary valve push plate is used to control the cabinet The opening of the upper and lower contact isolation baffles; the grounding bar ensures reliable contact between the maintenance busbar and the main grounding grid; the secondary pin is used to connect the secondary circuit, the test power supply is used to check the integrity of the live display, and the electric inspection lock can prevent false opening and closing Grounding knife; the opening and closing of the grounding knife switch and the contact of the moving contact can be checked through the observation window, and the grounding situation is displayed through the indicator light of the grounding knife switch position; when the charged display device senses that there is electricity, a voice alarm is given through the buzzer , to remind the operator; the five-proof lock can prevent mistakenly entering the charged interval and ensure the uniqueness of the grounding point; it is used to prevent misoperation of the grounding device and handcart; the reliable contact between the static contact of the grounding knife and the moving contact of the grounding knife, Reliable contact between the moving contact of the grounding knife and the static grounding contact of the grounding knife.

The beneficial effects of the utility model are reflected in the following aspects:

The utility model solves the problem of whether the switchgear can prevent the electrified closing knife when the switchgear is turned over for maintenance, can improve the reliability of equipment operation, and especially greatly reduce the operation safety risk of operating personnel. Compared with the current grounding handcart and electric inspection handcart, it has the characteristics of light weight, low cost, more complete functions, safer and more reliable operation. Through the five anti-blocking functions of electricity, electromagnetic and microcomputer, it can prevent the occurrence of accidents caused by live wire hanging to the ground wire.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the anti-static ground knife locking device described in the present invention.

Fig. 2 is a schematic diagram of the internal structure of the anti-static ground knife locking device described in the present invention.

Fig. 3 is a circuit diagram of the anti-static ground knife locking device described in the present invention.

detailed description

The utility model will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it by referring to the description.

As shown in Fig. 1 and Fig. 2, the utility model provides a locking device for anti-static ground knife, including: access hole 1, locking electromagnet 2, vehicle body 3, ground knife manual operation hole 4, ground knife spring 5. Charged display 6, secondary latch locking push plate 7, grounding knife 8, sensor 9, contact arm 10, plum blossom contact 11, primary valve push plate 12, grounding bar 13, auxiliary switch 14, secondary latch 15, test Power supply 16, electrometric lock 17, observation window 18, grounding knife switch position indicator light 19, buzzer 20, five anti-locks 21, grounding knife static contact 22 and grounding knife moving contact 23.

The access hole 1 is used to push in and pull out the electric test grounding handcart, and the electric locking of the operation hole of the entry and exit handcart and the operation hole of the grounding part is controlled by the locking electromagnet 2, and the handcart body 3 is used to make each component . The ground knife manual operation hole 4 is a manual opening and closing grounding knife switch, and the opening and closing of the grounding movable contact can be controlled by the grounding knife spring 5 . On the charged display 6, it can be displayed whether there is voltage or not in the three-phase overhaul bus. Whether the bus bar is grounded can be inspected by the grounding knife 8 . The sensor 9 can sense whether there is voltage in the three-phase busbar, and provides an induced voltage for the live display. The fixed moving contact and the sensor 9 are connected through the contact arm 10, and the plum blossom contact 11 is used for contact with the static contact of the cabinet. The primary valve push plate 12 is used to control the opening of the upper and lower contact isolation baffles of the cabinet. The grounding bar 13 ensures reliable contact between the maintenance busbar and the main grounding grid. The secondary plug 15 is used to communicate with the secondary circuit, the test power supply 16 is used to check the integrity of the charged display, and the electric detection lock 17 can prevent the wrong opening and closing of the grounding knife. The opening and closing of the grounding knife switch and the contact condition of the moving contact can be checked through the observation window 18, and the grounding situation is displayed through the grounding knife switch position indicator light 19. When the charging display device senses that there is electricity, the buzzer 20 will give a voice alarm to remind the operator. The five-proof lock 21 can prevent mistaken entry into the electrified interval and ensure the uniqueness of the grounding point; it is used for preventing misoperation of the grounding device and handcart. The reliable contact of the static contact 22 of the grounding knife and the grounding movable contact of the grounding knife, the reliable contact of the moving contact 23 of the grounding knife and the grounding static contact of the grounding knife.

As shown in Figure 3, the symbols in the figure are annotated as:

DST1, DST2: electromagnet

H: live display

FM: Buzzer

S9: Working position auxiliary switch

KA, KA2: intermediate relay (installed in the integrated electric test grounding device)

DXN: sensor

ZJ, ZJ2: Intermediate relay (installed in the low-voltage room of the PT cabinet)

DY1, DY2: Voltage relay (installed in the low-voltage room of the PT cabinet)

R1: Resistor, used to replace AC and DC signal lamps (installed in the integrated electric test grounding device)

Among them, 2 pieces of voltage relays (DY1, DY2) and 1 piece of voltage relay expansion contact relay (ZJ2) are added to the PT cabinet; 1 piece of working position relay ZJ of the integrated electric test grounding handcart device is added to the PT cabinet.

According to the on-site research and the characteristics of the switchgear equipment, the utility model designs a handcart frame base that matches the outlet switch, and installs electric testing, grounding devices, five-proof locks, push plates, secondary latches, etc. on the base. , to realize mandatory locking between the electroscope device and the grounding device, and reliably lock the grounding device when it is verified that there is electricity. The secondary voltage of the busbar voltage transformer is forced to lock the grounding device. The grounding knife switch of the device realizes forced locking with the access hole, and the handcart is forcedly locked when the grounding knife switch is closed. The microcomputer five-proof locking device is installed, and the five-proof locking function of the operation hole of the grounding part is realized through logical correlation.

Before using the device of the utility model, the working mode of the traditional electric inspection handcart and grounding handcart is to pull out the PT switch handcart to the maintenance position after the bus power failure, then push the electric inspection handcart into the PT interval to verify After the three phases have no voltage, pull out the handcart for electric testing, and then push the handcart for grounding into the PT interval to complete the grounding operation. There are the following defects and problems: (1) There is no microcomputer five-proof locking function, resulting in no locking of the operation hole of the grounding part, which does not meet the provisions of the "Electricity Safety Work Regulations". ⑵ There is no electrical, electromagnetic and other mandatory locking devices, which is prone to accidents caused by live wires hanging to the ground wire.

Using the device of this utility model, through in-depth research on the working principle of the electric inspection handcart and the grounding handcart, through the installation of electromagnets that control the entry and exit of the handcart and the operating hole of the grounding knife switch, and cooperate with the microcomputer to improve the locking function. The utility model focuses on solving the following four problems: 1. Reliably lock the grounding device when it is verified that there is electricity. 2. The secondary voltage of the bus voltage transformer is forced to lock the grounding device. 3. The handcart of the forced locking device when the grounding switch is closed. 4. Equipped with microcomputer five-proof locking device, the electric inspection device verifies that the busbar has electricity, and the five-proof lock of the grounding knife switch operation hole cannot be unlocked.

The utility model realizes the perfect anti-mislocking function, and effectively prevents the charged ground wire from hanging when the busbar and the busbar voltage transformer have power for the second time or the device grounding switch is in the closed position.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and implementation. It can be applied to various fields suitable for the utility model. Additional modifications can readily be made by those skilled in the art. Therefore, the invention should not be limited to the specific details and examples shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (1)

1. An anti-static ground knife locking device is characterized in that it includes: a vehicle entry and exit hole, a locking electromagnet, a car body, a ground knife manual operation hole, a grounding knife spring, a charged display, a secondary latch locking push plate, and a grounding Knife, sensor, contact arm, plum blossom contact, primary valve push plate, grounding bar, auxiliary switch, secondary latch, test power supply, electric inspection lock, observation window, grounding knife switch position indicator light, buzzer, five-proof lock , grounding knife static contact and grounding knife moving contact; The entry and exit hole is used to push in and pull out the electric test grounding handcart, and the electric locking of the operation hole of the entry and exit handcart and the operation hole of the grounding part is controlled by the locking electromagnet, and the handcart body is used to make each component; The ground knife manual operation hole is a manual opening and closing grounding knife switch, which can control the opening and closing of the grounding movable contact through the grounding knife spring; the charged display can display whether there is voltage in the three-phase busbar during inspection; the grounding knife can be used to check whether the busbar is grounded; the sensor It can sense whether there is voltage in the three-phase busbar, provide induction voltage for the live display, connect and fix the moving contact and sensor through the contact arm, the plum blossom contact is used to contact the static contact of the cabinet; the primary valve push plate is used to control the cabinet The opening of the upper and lower contact isolation baffles; the grounding bar ensures reliable contact between the maintenance busbar and the main grounding grid; the secondary pin is used to connect the secondary circuit, the test power supply is used to check the integrity of the live display, and the electric inspection lock can prevent false opening and closing Grounding knife; the opening and closing of the grounding knife switch and the contact of the moving contact can be checked through the observation window, and the grounding situation is displayed through the indicator light of the grounding knife switch position; when the charged display device senses that there is electricity, a voice alarm is given through the buzzer , to remind the operator; the five-proof lock can prevent mistakenly entering the charged interval and ensure the uniqueness of the grounding point; it is used to prevent misoperation of the grounding device and handcart; the reliable contact between the static contact of the grounding knife and the moving contact of the grounding knife, Reliable contact between the moving contact of the grounding knife and the static grounding contact of the grounding knife.