CN207459538U - A kind of electrical verification earth handcart device - Google Patents

Abstract

Based on existing same voltage class busbar work how direct electrical verification, a series of problems of ground connection, this project is proposed with " electrical verification earth handcart integration, electroscopic device integrity inspection, the uniqueness of earth point, preventing mistakenly entering charged chamber, anti- live ground wiring closes grounding switch, anti- band ground wire or grounding switch combined floodgate power transmission, valve opening ways control, device /V, earthing or grounding means mode of operation controls, remote signalling, earthing or grounding means position detection, the integrated electrical verification earth handcart apparatus integration electricity-detection grounding device of 12 functions of electrical inside and outside connection ", for the ground connection of 6 35kV metal armouring cabinet busbar overhauls.

Description

An electric test grounding handcart device

technical field

The invention belongs to the field of electric machinery, and in particular relates to an electric test grounding handcart device.

Background technique

With the continuous development of power technology, 6-35kV equipment is generally replaced by metal armored cabinets under current circumstances. How to directly inspect and ground the busbars of the same voltage level is a major problem that has plagued the operation and management units for a long time. The existing The grounding handcarts for the inspection and inspection of the switchgear busbar are two independent handcarts, which have the integrity detection function of the no-charge display device, the grounding point is not fixed, there is no complete electrical and mechanical and microcomputer five-proof anti-misoperation locking functions, and the operation is cumbersome. Serious violations of regulations and systems such as the "State Grid Corporation Electric Power Safety Work Regulations", "State Grid Corporation Safety Management Regulations on Preventing Electrical Misoperation" and "State Grid Corporation's Eighteen Major Anti-Accident Measures". Therefore, improving the convenience, safety and reliability of the electrical inspection and grounding of the switchgear bus is an urgent problem to be solved to improve the operation and management level of the power system.

Contents of the invention

Based on a series of problems of how to directly inspect and ground the busbars with the same voltage level, this project proposes the functions of "integration of electric inspection and grounding handcart, inspection of the integrity of the electrical inspection device, uniqueness of the grounding point, and error prevention." Inlet electrification interval, anti-charge hanging ground wire or grounding knife switch, anti-charge ground wire or grounding knife switch closing power transmission, valve opening mode control, device limit, grounding device operation mode control, remote signaling, grounding device position inspection , Electrical internal and external connection" 12 functions of the integrated electrical inspection grounding handcart device The integrated electrical inspection grounding device is used for the grounding of the busbar maintenance of 6-35kV metal armored cabinets.

For realizing technical purpose, the present invention uses following means:

(1) The integration is realized by rationally allocating the positions of the electric testing device and the grounding device in the same device. (2) Install live display device, induction probe and buzzer on the device to facilitate signal indication and sound prompt during electrical inspection, configure 220V power socket, and realize inspection of the integrity of electrical inspection device by connecting to external power supply. ⑶ Equipped with a microcomputer five-proof locking device, through the logical relationship, the fixity of the grounding point of the electrical inspection can be realized, and the five-proof locking function of the operation hole for the handcart in and out and the operation hole of the grounding part can be realized according to the prescribed operation process. ⑷ Install an electromagnet on the device to control the entry and exit of the handcart, and connect the auxiliary contact of the busbar incoming line and the bus-tie switch handcart to its control circuit to realize the anti-intrusion charged interval. (5) Install the electromagnet on the device to control the entry and exit of the handcart, and connect the auxiliary contact at the position of the grounding knife switch to its control circuit; install the electromagnet on the device to control the operation hole of the grounding device, and connect it to the live display and busbar The auxiliary contact of the secondary voltage relay of the voltage transformer is connected to its control circuit, so as to realize the anti-static hanging bottom line or closing the grounding knife switch. ⑹ Install an electromagnet on the bus coupler and incoming line switch handcart to control the entry and exit of the handcart, and connect the auxiliary node of the grounding knife switch to its control circuit to realize the function of anti-grounding closing. ⑺By reasonably setting the push plate, the control of the opening mode of the valve is realized. ⑻ By setting the transmission screw rod on the chassis of the handcart device, the device limit is realized. ⑼ Through the circuit setting of the grounding device, the control of the operation mode of the grounding knife switch is realized. ⑽ The remote signaling function is realized by uploading the position of the handcart and the grounding knife switch through the measurement and control device. ⑾Through electrical and mechanical settings, realize the light, mechanical and background inspection of the grounding device position. ⑿ By setting secondary pins on the device, the electrical internal and external connections are realized. Thus, the portability, simplification and reliability of the integrated handcart are realized. It has the characteristics of light weight, low cost, perfect function, safe and reliable operation. It achieves the purpose of shortening the power failure operation time, improving the reliability of equipment operation, and reducing the risk of personnel operation and work safety.

Description of drawings

Figure 1 is the front view of the electric test grounding handcart;

Figure 2 is a side view of the electric test grounding handcart;

Fig. 3 The grounding knife blocking circuit of the main transformer receiving cabinet and the grounding knife blocking circuit of the bus coupler cabinet;

Figure 4 is a schematic diagram of the electric test cabinet circuit.

Among them (1) access hole (2) locking electromagnet (3) handcart body (4) manual operation hole of ground knife (5) grounding knife spring (6) charged display (7) secondary latch locking push plate (8) Ground knife (9) Sensor (10) Contact arm (11) Torx contact (12) Primary valve push plate (13) Ground bar (14) Auxiliary switch (15) Secondary pin (16) Test power supply (17) Electricity test Lock (18) observation window (19) grounding knife switch position indicator light (20) buzzer (21) five anti-locks (22) grounding knife static contact (23) grounding knife moving contact.

Detailed ways

The overall frame of the device of the present invention is made up of following 23 parts: (1) in and out car hole (2) locking electromagnet (3) handcart body (4) ground knife manual operation hole (5) ground knife spring (6) charged display ( 7) Secondary bolt locking push plate (8) grounding knife (9) sensor (10) contact arm (11) plum blossom contact (12) primary valve push plate (13) grounding bar (14) auxiliary switch (15) secondary Pin (16) Test power supply (17) Electrometric lock (18) Observation window (19) Grounding switch position indicator light (20) Buzzer (21) Five-proof lock (22) Grounding knife static contact (23) Grounding Knife contact.

Combining the characteristics of metal armored cabinets, the present invention develops a handcart frame base that matches the outlet switch, and installs electric testing, grounding devices, five-proof locks, alarm devices, push plates, secondary latches, etc. on the base. , to achieve ⑴ integration: in the same device, the electric testing device and the grounding device are reasonably allocated to ensure that the structure is simple, the operation is flexible, economical and practical, and it complies with the regulations. ⑵Integrity inspection of the device: Through the sensor, live display device, and buzzer, the sound and light inspection, voice alarm and integrity inspection of the electroscope device are realized. (3) The uniqueness of the grounding point: the five-proof logic blocking function is realized between the device and the busbar grounding compartment to ensure the uniqueness of its pushing into the compartment (set an obvious grounding sign at the appropriate position of the compartment). ⑷Anti-intrusion electrification interval: Through the forced locking between the device and the position of the bus coupler, the busbar incoming switch handcart, and the grounding knife switch, the entry of the handcart of the device can be reliably controlled. ⑸ Anti-live and grounding knife switch: Through the forced locking between the electrotest device and the grounding device, the grounding device can be reliably blocked when it is verified that there is reverse power transmission on the secondary side of the bus bar or voltage transformer. ⑹ Closing with grounding knife switch: Mandatory locking is realized between the handcart of the bus coupler and bus inlet switch and the device, and the device can reliably control the entry of the bus coupler and bus inlet switch handcart when it is in the working position. ⑺Valve opening mode: through reasonable setting of the push plate, the control of the valve opening mode is realized. ⑻Device limit: By setting the transmission screw rod on the chassis of the handcart device, the device limit is realized to prevent the moving and static contacts from being damaged by pushing too deep. ⑼ Grounding knife switch operation mode: through the setting of the grounding device circuit, manual or electric operation of the grounding knife switch is realized. ⑽Remote signaling: The remote signaling function is realized by uploading the position of the handcart and the grounding knife switch through the measurement and control device. ⑾ Grounding knife switch position inspection: Through the electrical, mechanical and observation window settings, the light, mechanical and background position inspection of the grounding device position can be realized. ⑿Secondary plug: By setting the secondary plug on the device, the electrical internal and external connections are realized.

One of the anti-grounding closing and locking devices is equipped with an electromagnet to control the entry and exit of the handcart on the handcart of the bus tie switch and the busbar incoming switch, and is connected with the grounding handcart device of the electric test through electrical, electromagnetic, and microcomputer five-proof Locking is associated to realize mandatory locking. By configuring the microcomputer five-proof locking device and logical association, the microcomputer five-proof program does not pass through the locking of the handcart operating hole of the bus voltage transformer, and the locking of the handcart operating hole of the bus incoming line (bus coupler) switch cannot pass. Install the electromagnet to control the entry and exit of the handcart on the bus coupler and incoming line switch handcart, and connect the auxiliary contact of the grounding knife switch to its control circuit to realize the anti-grounding closing function.

Another safety device of the present invention is used for electric handcart anti-mis-entry charged interval locking device, wherein the access hole 1 is used to push in and pull out the electric test grounding handcart, and the locking electromagnet 2 controls the operation hole and grounding of the handcart. Part of the electrical locking of the operation hole, the handcart body 3 is used to make each part. Wherein the secondary latch 15 is placed on the secondary latch locking push plate 7 .

During implementation, the microcomputer five-proof locking device is configured, and the five-proof locking function of the operation hole for the handcart to enter and exit is set through logical association. By installing the locking electromagnet 2 that controls the entry and exit of the handcart on the device, and connecting the bus incoming line and the auxiliary contact of the bus tie switch handcart to its control circuit, through the handcart frame base that matches the outlet switch, in the base Electromagnets, five-proof locks, secondary latches, etc. are installed on the seat to realize the forced locking of the device and the position of the handcart of the bus coupler and bus incoming switch. When any interval of the bus is in the working position, the device The five-proof lock of the operation hole for entering and exiting the vehicle cannot pass through.

Combined with Figure 1, the functions of each component are:

(1) In and out of the car hole: push in and pull out the electric test grounding handcart.

(2) Locking electromagnet: Control the electrical locking of the operating hole for entering and exiting the handcart and the operating hole for the grounding part.

(3) Handcart body: the supporting mechanism of each component.

(4) Ground knife manual operation hole: manually open and close the ground knife switch.

(5) Ground knife spring: control the opening and closing of the grounding moving contact.

(6) Charged display: Displays whether the three-phase voltage of the maintenance bus is present or not.

(7) Secondary latch lock: fix the secondary latch.

(8) Grounding knife: Overhaul busbar grounding.

(9) Sensor: sense whether there is voltage in the three-phase busbar, and provide induced voltage for the electrified display.

(10) Contact arm: connect fixed moving contact and sensor

(11) Plum blossom contact: the contact between the device and the static contact of the cabinet.

(12) Primary valve push plate: control the opening mode of the upper and lower contact isolation baffles of the cabinet.

(13) Grounding bar: ensure the reliable contact between the maintenance busbar and the main grounding grid.

(14) Auxiliary switch: device position contact (S8, S9 position)

(15) Secondary plug: connected to the secondary circuit.

(16) Test power supply: used to check the integrity of the live display.

(17) Electrometric lock: prevent the grounding knife from being mistakenly closed.

(18) Observation window: Check the opening and closing of the grounding knife switch and the contact of the moving contact.

(19) Grounding switch position indicator light: observe the opening and closing position of the grounding switch.

(20) Buzzer: When the charging display device senses that there is electricity, it will give a voice alarm to remind the operator.

(21) Five anti-locks: prevent accidental entry into the charged interval and ensure the uniqueness of the grounding point; it is used to prevent misoperation of the grounding device and handcart.

(22) Static contact of the grounding knife: reliable contact with the grounding moving contact of the grounding knife.

(23) Grounding knife moving contact: reliable contact with the grounding knife grounding static contact.

Notes on symbols in the secondary circuit in Figure 3:

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

CZ: socket

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)

D1: Lighting lamp (installed in the integrated electric test grounding device)

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

illustrate:

1. Add 2 voltage relays (DY1, DY2) to the PT cabinet, and 1 voltage relay expansion contact relay (ZJ2);

2. The PT cabinet is equipped with an integrated electric test grounding handcart device working position relay ZJ 1 piece;

3. The working position of the complete set of integrated electric test and grounding handcart device is to add locking contacts to the incoming line cabinet and the bus coupler cabinet, among which the integrated electric test and grounding handcart device of the bus voltage transformer cabinet of section I leads to the No. 1 incoming line and bus coupler, The integrated electric test grounding device of the voltage transformer cabinet of the second section of the bus leads to the No. 2 incoming line cabinet and the bus coupler cabinet.

4. The chassis lock circuit of the integrated electric test grounding device is drawn from the incoming line and the working position contact of the bus coupler switch handcart, and the integrated electric test grounding handcart device of the bus voltage transformer cabinet of section I is drawn from the No. 1 incoming line and bus coupler. The integrated electric test grounding device of the voltage transformer cabinet of the second section bus is drawn from the No. 2 incoming line cabinet and the bus coupling cabinet.

It can be seen from the specific implementation of the invention that the device is flexible, convenient, and fully functional, and it is more in line with the provisions of the "Electricity Safety Work Regulations", "Electricity Operation Regulations", and "Equipment Operation and Maintenance Specifications", and is convenient for 6-35kV The electrical inspection and grounding of the busbar work solves the on-site problems, ensures the safety of operation, work, equipment and personnel, and greatly improves the economic and safety benefits.

Before using the utility model device, the working mode of the traditional electric inspection handcart and grounding handcart is to pull out the PT switch handcart to the inspection position after the bus power failure, and 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: ⑴Electrical testing and grounding handcarts are independent, cumbersome to operate and inconvenient to store. ⑵ There is no electrical circuit for checking whether the charged display is intact. (3) There is no five-proof locking function of the microcomputer, resulting in that the grounding point of the electric test cannot be fixed, and the operation hole for entering and exiting the handcart and the operation hole of the grounding part are not locked, which does not meet the provisions of the "Electricity Safety Work Regulations". (4) There is no five-proof locking device, and it is easy to accidentally enter the live interval and hang the live wire to the ground wire; when the bus power supply is restored, it is easy to close the switch with the ground wire. (5) There is no observation window and electrical circuit for checking whether the grounding part is in good contact.

Using this utility model device, through in-depth research on the working principle of the electric test handcart and the grounding handcart, the electric test and the grounding are integrated, and the electric test handle and the grounding handle are installed on the same handcart, and the electric test To improve the blocking function of grounding, this project focuses on solving the following twelve problems: integration of electric inspection and grounding handcart, integrity inspection of electric inspection device, uniqueness of grounding point, anti-mis-entry charged interval, anti-electricity hanging ground wire Or close the grounding knife switch, anti-ground wire or grounding knife switch closing power transmission, valve opening mode control, device limit, grounding device operation mode control, remote signaling, grounding device position inspection, electrical internal and external connections.

According to the content of the project and combined with the actual situation, the expected goals of the project are proposed:

1. Through the rationalized layout of the electric test and grounding device, ensure that its structure is simple, flexible in operation, economical and practical, and in compliance with regulations.

2. By installing a buzzer, a live display, and an external 20V power socket, the sound and light inspection, voice alarm function and integrity inspection function of the electrotest device can be realized.

3. Through the five anti-blocking functions of electricity, electromagnetic and microcomputer, the uniqueness of the grounding point can be realized, which can effectively prevent the accidental entry into the charged interval, prevent the live wire from being connected to the ground wire, and prevent the occurrence of closing accidents with the ground wire.

4. By reasonably setting the push plate, the control of the opening mode of the valve is realized; by setting the transmission screw rod on the chassis of the handcart device, the device limit is realized; through the circuit setting of the grounding device, the control of the operation mode of the grounding knife switch is realized; through the measurement and control device Upload the position of the handcart and the grounding knife switch to realize the remote signaling function; through the electrical and mechanical settings, realize the light, mechanical and background inspection of the position of the grounding device to ensure operational safety.

5. By setting the secondary plug on the device, the internal and external electrical connection is realized, which ensures the reliable electrical connection of the internal and external circuits.

6. The operation time is less than 10 minutes.

The invention of the device ensures the safety of operation, work, equipment and personnel, and has extremely high economic and safety benefits.

This project aims to solve the problem of whether the power inspection and grounding can be carried out safely when the busbar of the switchgear is transferred and repaired. It can improve the work efficiency of the operation and maintenance personnel of the substation (switching station), shorten the operation time of power outages, and effectively prevent accidental entry into the live interval and live connection to the ground. Line accidents, improve the reliability of equipment operation, especially greatly reduce the operational safety risks of operation and maintenance personnel. Compared with the previous independent grounding handcart and electric inspection handcart, it has the characteristics of simple structure, low cost, more complete functions, safer and more reliable operation.

Claims (3)

1. a kind of electrical verification earth handcart device, which is characterized in that including：Pass in and out vehicle hole, latching electromagnet, vehicle body, earthing knife-switch hand Dynamic handle hole, earthing spring, electrification display, secondary bolt locking push plate, earthing, sensor, contact arm, Mume flower contact, Valve push plate, earthing bar, auxiliary switch, secondary bolt, experiment power supply, electrical verification lock, observation window, grounding switch position instruction Lamp, buzzer, five anti-locksets, earthing static contact and earthing moving contact；

The disengaging vehicle hole for being pushed into and pulling out electrical verification earth handcart, by latching electromagnet control disengaging handcart handle hole and The electric blocking of the handle hole of grounded part, handcart body are used to that each component to be made；Earthing knife-switch manual operation hole is manual Division grounding switch can control the division of ground connection moving contact by earthing spring；Maintenance can be shown on electrification display Busbar three-phase has no-voltage；It can overhaul whether busbar is grounded by earthing；Sensor can sense busbar three-phase whether there is electricity Pressure, induced voltage is provided for charged display, connects fixed moving contact and sensor by contact arm, Mume flower contact is used for quiet with cabinet The contact of contact；Valve push plate is used to control the unlatching of contact isolation baffle plate above and below cabinet；Earthing bar ensures maintenance busbar With the reliable contacts of main grounding grid；Secondary bolt for connecting secondary circuit, for electrification display integrity examine by experiment power supply It looks into, electrical verification lock can prevent division earthing by mistake；It can check that grounding switch divide-shut brake and moving contact contact feelings by observation window Condition, and pass through grounding switch position indicator and show Grounding；When charged display device has sensed electricity, pass through buzzer Audio alert is carried out, reminds operating personnel；Five anti-locksets can prevent mistakenly entering charged chamber, it is ensured that the uniqueness of earth point；With In the anti-misoperation of earthing or grounding means and handcart；The reliable contacts of earthing static contact and earthing ground connection moving contact, earthing move The reliable contacts of contact and earthing grounding static contact.

2. a kind of electrical verification earth handcart device according to claim 1, which is characterized in that further include anti-switching on earth wire and close Locking device, the electromagnet of installation control handcart disengaging handle hole, is grounded with electrical verification on bus connection switch, busbar service entrance switch handcart Cart device is latched associated, realization forced blocking by electrical, electromagnetism, micro_computer five_proof.

3. a kind of electrical verification earth handcart device according to claim 1, which is characterized in that further include and prevent for electric power handcart Mistakenly entering charged chamber blocking device, described device include disengaging vehicle hole, handcart body, and secondary bolt is latched push plate, further includes electricity Magnet, five anti-locksets and secondary bolt, wherein electromagnet are placed in the middle part and bottom of handcart body, are controlled by five anti-locksets System；Secondary bolt is placed on secondary bolt locking push plate, and five anti-lockset of cooperation carries out forced blocking.