CN204793810U - 10kV cubical switchboard generating line earthing device - Google Patents

Abstract

The utility model relates to a busbar grounding device, in particular to a 10kV switch cabinet busbar grounding device. Including the chassis car, the chassis car has a tool box, the chassis car is equipped with grounding contacts, the chassis car is equipped with a safety baffle, and there are multiple through holes on the upper part of the safety baffle corresponding to the switch cabinet contacts. A warning sign rotation mechanism is installed on one side of the car. This device integrates the functions of electric testing and grounding handcart, and is equipped with a linkage warning device and a safety protection baffle made of transparent materials. This device has the functions of electric inspection and grounding, and can effectively lock the device and the door of the switch cabinet, effectively avoiding the misoperation of the operator and the operator's direct contact with the live equipment in the cabinet, and improving the safety of personnel and equipment. This device has strong versatility, reduces the operation process and the workload of operators, effectively solves the problems of electrical inspection and grounding of the busbar of the removable switchgear, and further improves the safety management level of the 10kV switchgear.

Description

10kV switchgear busbar grounding device

technical field

The utility model belongs to the technical field of electric appliances, and relates to a busbar grounding device, in particular to a 10kV switch cabinet busbar grounding device.

Background technique

At present, in the power system, the cabinet body of the 10kV removable switchgear has the "five-proof interlock function", and the door and sealing plate of the switchgear cannot be opened when the switchgear is charged. According to the power safety operation regulations, the switchgear must pass the power inspection before power outage maintenance, and then connect the grounding wire after confirming that there is no power. Only when the switchgear is effectively grounded can the switchgear be entered to carry out maintenance work. Since the 10kV removable switchgear has not been electrified and confirmed that there is no electricity, the sealing plate cannot be opened, and the busbar cannot be connected to the ground wire. Some manufacturers have designed and produced electric testing handcarts and grounding handcarts for circuit breaker rooms, but since the handcart and other circuit breakers have no electrical or mechanical locking function, there are great safety hazards in use, and the handcart is relatively heavy. Heavy, complicated operation process, low work efficiency and high labor intensity of operators, so it has not been effectively popularized and applied.

Contents of the invention

The utility model provides a grounding device for a bus bar of a 10kV switch cabinet, which is equipped with supporting tools such as an electroscope and a special grounding wire. This device has a reliable electrical or mechanical locking device, has the functions of electric test and grounding, and can form an effective lock, integrates the functions of electric test and grounding handcart, reduces the operation process and device weight, and can be directly used on the busbar PT cabinet , effectively solve the problem that the bus bar of the removable switchgear cannot be directly tested and grounded, and further improve the safety management level of 10kV switchgear.

In order to achieve the above object, the technical solution adopted by the utility model is:

A 10kV switchgear busbar grounding device, characterized by: including a chassis car with a tool box, a grounding contact installed on the chassis car, a safety baffle installed on the chassis car, and the upper part of the safety baffle and the switch There are multiple through holes in the corresponding position of the cabinet contact, and a warning sign rotation mechanism is installed on one side of the chassis.

According to the grounding device for the 10kV switchgear busbar, it is characterized in that: the warning sign rotating mechanism includes a rack connecting rod and a supporting sleeve on the side wall of the chassis, and the rack connecting rod is worn inside the supporting sleeve to warn The plate is mounted on the stand.

According to the grounding device for the 10kV switchgear busbar, it is characterized in that: the warning sign is hinged on the bracket through a pivot pin, the gear on the pivot pin meshes with the rack at one end of the rack connecting rod, and the other end of the rack connecting rod With limit cap.

According to the grounding device for the 10kV switchgear busbar, it is characterized in that: the tool box is installed on the upper rear part of the chassis, including the box body, the lower part of the box body is connected to the chassis car through bolts, and the upper part of the box body is connected to the box body through hinges. The cover is connected, and a hasp is installed on the box cover and the box body, and the box cover and the box body are closed by the hasp. Inside the tool box, there are electrical inspection insulating operation rods, grounding plugs and grounding wires.

According to the grounding device for the 10kV switchgear bus bar, it is characterized in that: the electrical inspection insulating operating rod is an integrated structure of an acousto-optic electrical inspection indicator and a telescopic insulating rod, and the electrical inspection insulating operating rod includes a telescopic insulating rod, an acousto-optic The electric test indicator and contact electrode, the sound and light test indicator is installed on the front end of the telescopic insulating rod, the contact electrode is installed on the front end of the sound and light test indicator, and the contact electrode has a "T" shape structure.

According to the 10kV switchgear busbar grounding device, it is characterized in that: the rear end of the telescopic insulating rod is equipped with a handle, the front end of the handle is provided with a hand guard, and the middle of the telescopic insulating rod is installed with a tightening handle.

According to the grounding device for the 10kV switchgear busbar, it is characterized in that: the rear part of the grounding plug is designed with a "T"-shaped buckle groove, and a spring is installed in the "T"-shaped buckle groove, and the side of the grounding plug is crimped by bolts There are grounding wires, and the three-phase grounding wires are combined and connected to the friction contact at the lower part of the chassis and the mouth-pressing grounding contact at the front of the chassis.

According to the grounding device for the 10kV switchgear busbar, it is characterized in that: the middle part of the safety baffle is a transparent baffle, and there are three circular through holes on the upper part of the safety baffle.

According to the 10kV switchgear busbar grounding device, it is characterized in that: valve push plates are installed on the left and right fronts of the chassis.

The utility model is equipped with a chassis car, a tool box, a safety baffle, an electrical inspection insulating operating rod, a grounding plug, and a linkage warning sign, etc., which are required for electrical inspection and grounding operations, and integrates the functions of the electrical inspection and grounding handcart. It has the functions of electric inspection and grounding, which reduces the operation process and the workload of operators. The electrical inspection insulating operation rod is an integrated structure of the electrical inspection indicator and the insulating operating rod, and has a telescopic function, which realizes the effective integration of the two functions, and is easy to carry and operate. The device is equipped with a linkage warning sign, which can effectively lock the device and the door of the switch cabinet, remind the operator that the busbar grounding cannot be closed for power transmission, and effectively avoid the operator's misoperation. The baffle is convenient for the operator to observe and effectively prevents the operator from directly contacting the live equipment in the cabinet, improving the safety of personnel and equipment. The device is equipped with two grounding methods, the bottom friction contact and the front pressure mouth type grounding contact, which is suitable for the cabinet shape of the two grounding methods and improves the versatility of the device. The device can effectively solve the problem that the bus bar of the removable switchgear cannot be directly tested and grounded, and further improves the safety management level of the 10kV switchgear.

Description of drawings

Figure 1: Front view of the utility model.

Figure 2: Top view of the utility model.

Figure 3: Right view of the utility model.

Figure 4: Left view of the utility model.

Figure 5: The open view of the utility model overlooking the box cover.

Figure 6: Front view of the utility model grounding plug.

Figure 7: A top view of the grounding plug of the present invention.

Figure 8: The left view of the utility model grounding plug.

In the attached drawings: 1. Chassis vehicle; 2. Toolbox; 3. Safety baffle; 4. Through hole; 5. Hasp; 6. Box cover; 7. Box body; 8. Gear; 9. Support sleeve; 10. Rack connecting rod; 11. Valve push plate; 12. Pressure mouth type grounding contact; 13. Friction type contact; 14. Warning sign; 15. Bracket; 16. Hinge; 17. Tighten the handle; 18. Shaft pin; 19. Acousto-optic electrometry indicator; 20. Contact electrode; 21. "T" shape structure; 22. Grounding plug; 23. Grounding wire; 24. Hand guard; 25. Handle; 26. Telescopic insulating rod; 27. "T" shaped buckle groove; 28. spring.

Detailed ways

As shown in Figure 1, the 10kV switchgear busbar grounding device includes a chassis car 1, a friction contact 13 is installed on the lower part of the chassis car 1, a nozzle-type grounding contact 12 is installed on the front part, and a tool box 2 is installed on the upper part of the chassis car 1 , safety baffle 3 and warning sign 4 and other components.

As shown in Figure 5, the tool box 2 is installed on the upper rear portion of the chassis vehicle 1, including a box body 7, and the lower part of the box body 7 is connected with the chassis vehicle 1 by bolts. Casing 7 tops are connected with case cover 6 by hinge 16, and hasp 5 is installed on case cover 6 and casing 7, and case cover 6 and casing 7 are closed by hasp 5. Appliances such as an electrical test insulating operating rod, a grounding plug 22 and a grounding wire 23 are placed inside the tool box 2 . The insulating operating rod for electrical inspection is an integrated structure of the acousto-optic electrical inspection indicator 19 and the insulating operating rod.

The electrical testing insulating operating rod comprises a telescopic insulating rod 26, a handle 26 is installed at the rear end of the telescopic insulating rod 26, and a guard 24 is provided at the front end of the handle 26. A tightening handle 17 is installed in the middle of the telescopic insulating rod 26, and an acousto-optic electric test indicator 19 is installed at the front end of the telescopic insulating rod 26. A contact electrode 20 is installed on the front end of the acousto-optic electrometric indicator 19, and the contact electrode 20 is designed as a "T"-shaped structure.

As shown in Figure 6-8, a "T"-shaped buckle groove 27 is designed at the rear of the grounding plug 22, and a spring 28 is installed in the "T"-shaped buckle groove 27, and a grounding wire 23 is crimped on the side of the grounding plug 22 through bolts. The ground wires 23 of the three phases are combined and connected to the friction contact 13 at the lower part of the chassis car 1 and the nozzle-pressing contact 12 at the front part of the chassis car 1 .

Safety baffle 3 is installed in the upper middle part of chassis car 1, and the middle of safety baffle 3 is made of transparent material, and is provided with three circular through-holes 4 corresponding to switchgear contact position on the top. A valve push plate 11 is installed on the left and right sides of the chassis vehicle 1. The left rear portion of the chassis vehicle 1 is equipped with a linkage type warning sign 14, and the warning sign 14 includes a rack connecting rod 10. One end of the rack link 10 is a rack, and the other end is the rack link 10 . One end of the rack connecting rod 10 is fixed on the side wall of the chassis 1 through the support sleeve 9, and the other end is fixed on the bracket 15 and is externally meshed with the gear 8. A warning sign 14 is fixed on the gear 8, and is hinged on the support 15 through a pivot pin 18. Words such as "busbar grounding, prohibiting closing" can be printed on the warning sign 14.

working principle

When the 10kV switchgear busbar grounding device is placed in the middle-mounted switchgear, first shake the chassis 1 to the working position. The friction contact 13 at the bottom of the chassis 1 or the nozzle-type grounding contact 12 at the front are in contact with the corresponding contacts on the cabinet, and one end of the grounding wire 23 is grounded; , the rack connecting rod 10 and the supporting sleeve 9 undergo relative motion, when the supporting sleeve 9 continues to slide towards the direction of the switchgear to the limit cap at the end of the rack connecting rod 10, the supporting sleeve 9 will drive the rack connecting rod 10 moves, and the tooth bar of rack connecting rod 10 drives gear 8 and turns, and when chassis car arrives working position, interlocking warning sign 14 rotates 90 ° counterclockwise to horizontal position and stretches out outside the cabinet. When the chassis car 1 is in the working position, the door of the circuit breaker room cannot be closed, and the operator is reminded that "the bus bar is grounded, and closing is prohibited".

Then, the electric test insulating operation rods are respectively inserted into the static contacts on the side of the bus bar of the switchgear through the three through holes 4 on the safety baffle 3 for electric test. After confirming that there is no electricity, the grounding plug 22 with the grounding wire 23 is installed on the electrical inspection insulating operation bar. As shown in Figure 5, the contact electrode 20 of the "T"-shaped structure 21 of the electrical testing insulation operation rod is stuck in the "T"-shaped buckle groove 27 on the grounding plug 22, and then the grounding plug 22 is in static contact with the busbar side of the switch cabinet. Insert the plugs, and then push the electrical testing insulating operating rod inward and rotate it to separate the electrical testing insulating operating rod from the grounding plug 22. By analogy, connect the other two grounding plugs 22 to the static contacts on the busbar side of the switchgear. Plug in and complete the grounding of the bus bar of the 10kV switchgear.

Example

The utility model can be used on the 800mm wide PT cabinet of the 10kV central cabinet KYN28A-12. The device adopts the chassis car for the 800mm wide cabinet. grounding method. The grounding plug 22 adopts a Φ35 plum blossom contact, and the rear part of the plum blossom contact is provided with a "T"-shaped buckle groove 27, and a spring 28 is installed inside; the grounding wire 23 adopts 1.5m×3 pieces+2m long 25mm ² copper braided wires, 25mm ^2. One end of the braided copper wire is crimped on the Φ35 plum blossom contact, and the other end is crimped on the friction contact 13 at the bottom of the chassis car 1 and the mouth-pressing ground contact 12 at the front. The left side of the chassis car 1 is equipped with a linkage type warning sign 14, and the left and right sides are respectively provided with a valve push plate 11. The device can be used to directly open the valve of the contact box, and use the electric test insulating operating rod to conduct electric test. After confirming that there is no electricity, use the electric test insulating operating bar to plug in the grounding plug 22 to realize the busbar of the 10kV central cabinet KYN28A-12 grounded.

Claims (9)

1. a 10kV switch cabinet bus grounding device, it is characterized in that: comprise chassis vehicle (1), with tool box (2) on chassis vehicle (1), (1) is provided with grounding contact to chassis vehicle, above chassis vehicle (1), safety screen (3) is installed, safety screen (3) top and switch cabinet contact correspondence position are with multiple through hole (4), and the side of chassis vehicle (1) is provided with warning sign rotating mechanism.

2. 10kV switch cabinet bus grounding device according to claim 1, it is characterized in that: described warning sign rotating mechanism comprises the stop sleeve (9) on tooth bar connecting rod (10), chassis vehicle (1) sidewall, tooth bar connecting rod (10) is through stop sleeve (9) the inside, and warning sign (14) is arranged on support (15).

3. 10kV switch cabinet bus grounding device according to claim 2, it is characterized in that: described warning sign (14) is hinged on support (15) by pivot pin (18), gear (8) on pivot pin (18) engages with the tooth bar of tooth bar connecting rod (10) one end, and tooth bar connecting rod (10) other end is with limited cap.

4. 10kV switch cabinet bus grounding device according to claim 1, it is characterized in that: described tool box (2) is loaded on the rear portion above of chassis vehicle (1), comprise casing (7), casing (7) bottom is connected with chassis vehicle (1) by bolt, casing (7) top is connected with case lid (6) by hinge (16), case lid (6) and casing (7) are provided with hasp (5), and tool box (2) inside is placed with electricity-testing insulating hook stick, ground pin (22) and earth connection (23).

5. 10kV switch cabinet bus grounding device according to claim 4, it is characterized in that: described electricity-testing insulating hook stick is acousto-optic electrical verification indicating device (19) and telescopic insulating rod (26) integral structure, electricity-testing insulating hook stick comprises telescopic insulating rod (26), acousto-optic electrical verification indicating device (29) and contact electrode (20), acousto-optic electrical verification indicating device (19) is arranged on the front end of telescopic insulating rod (26), contact electrode (20) is arranged on the front end of acousto-optic electrical verification indicating device (19), with "T"-shaped structure (21) on contact electrode (20).

6. 10kV switch cabinet bus grounding device according to claim 5, it is characterized in that: the rear end of described telescopic insulating rod (26) is provided with handle (25), handle (25) front end is provided with handguard (24), and the centre of telescopic insulating rod (26) is provided with and screws handle (17).

7. 10kV switch cabinet bus grounding device according to claim 4, it is characterized in that: described ground pin (22) rear design has "T"-shaped catching groove (27), spring (28) is installed in "T"-shaped catching groove (27), the side of ground pin (22) is crimped with earth connection (23) by bolt, and the earth connection (23) of three-phase gathers and is connected with the pressure mouth formula grounding contact (12) of chassis vehicle (1) bottom the friction type contact (13) and chassis vehicle (1) front portion afterwards.

8. 10kV switch cabinet bus grounding device according to claim 1, is characterized in that: the mid portion of described safety screen (3) is transparent baffle plate, and safety screen (3) top is with three manholes (4).

9. 10kV switch cabinet bus grounding device according to claim 1, is characterized in that: the front portion, the left and right sides of chassis vehicle (1) is provided with valve push pedal.