CN213340079U

CN213340079U - Discharging device for charged plate and capacitor device comprising same

Info

Publication number: CN213340079U
Application number: CN202021675968.1U
Authority: CN
Inventors: 张会民; 钱君毅; 沈小益
Original assignee: Shanghai Cooper Electric Power Container Co ltd
Current assignee: Shanghai Cooper Electric Power Container Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-06-01
Anticipated expiration: 2030-08-12

Abstract

The utility model provides a capacitor device that is used for discharge device of electrified board and includes it, discharge device includes: a conductive post including opposing first and second end portions, and an intermediate portion; a first fastener configured to secure the first end of the conductive post to the live plate; the conductive tube is sleeved at the middle part of the conductive column; and a second fastener configured to be secured to the second end of the conductive post. The utility model discloses a discharge device can avoid the earth connection to drop to improve maintenance personal's security.

Description

Discharging device for charged plate and capacitor device comprising same

Technical Field

The utility model relates to a capacitor discharge device, concretely relates to a capacitor device that is used for discharge device of electrified board and includes it.

Background

The capacitor acts as an energy storage element and when the power supply is cut off or disconnected from the electrical connection between the capacitor and the power supply, a large amount of residual charge is present on the capacitor. Without a discharge path, the residual charge on the capacitor will be present for a long time, and thus the capacitor will carry a high voltage for a long time. When a maintainer overhauls electrical equipment, if the maintainer carelessly touches the electrified capacitor, an electric shock accident can be caused. In addition, when the charged capacitor is connected into the circuit again, the high voltage on the capacitor is superposed with the power grid voltage, so that high voltage impact can be generated, and other equipment can be damaged.

In order to prevent the residual charge on the capacitor from threatening the personal safety of the operator and from causing overvoltage of the capacitor, a discharging device is required to discharge the residual charge on the capacitor.

The prior art discharge device usually uses a grounding wire to hang on the live part of the capacitor to discharge the capacitor. However, the grounding wire of the prior art is easy to fall off from the charged part on the capacitor, and the safety of the capacitor after discharging and the safety of the maintainer cannot be ensured.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that prior art exists, the utility model provides an electric discharge device for electrified board, electric discharge device includes:

a conductive post including opposing first and second end portions, and an intermediate portion;

a first fastener configured to secure the first end of the conductive post to the live plate;

the conductive tube is sleeved at the middle part of the conductive column; and

a second fastener configured to be secured to the second end of the conductive post.

Preferably, the inner side wall of the conductive tube is in contact with the conductive column, and the conductive tube is configured to rotate around the conductive column.

Preferably, the conductive column is a cylinder with an external thread, and a first end of the conductive column passes through the charged plate.

Preferably, the conductive post is a bolt.

Preferably, the first fastener comprises a first nut for securing the first end of the conductive post to the live plate.

Preferably, the first fastener further comprises a first flat washer and a second flat washer on opposite sides of the live plate, the first flat washer, the second flat washer and the first nut securing the first end of the conductive post to the live plate.

Preferably, the first fastener further comprises a spring washer located between the second flat washer and the first nut.

Preferably, the second fastener includes a second nut fixed to the second end of the conductive post.

Preferably, the second fastener further comprises a third flat washer located between the second nut and the end of the conductive tube.

Preferably, the second nut is a ball nut.

The utility model also provides a capacitor device, include:

a capacitor comprising a charged plate; and

the discharge device as described above, which is mounted on the charged plate.

The utility model discloses a discharge device can avoid the earth connection to drop, ensures that the condenser discharges and finishes to carry out the testing and maintenance to the condenser safely, improved maintenance personal's security.

Drawings

Embodiments of the invention are further described below with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of a discharge device according to a preferred embodiment of the present invention.

Fig. 2 is a schematic plan view of the discharge device shown in fig. 1 viewed in the direction indicated by the arrow a 1.

Fig. 3 is an exploded view of the discharge device shown in fig. 1.

Fig. 4 is a schematic plan view of the discharge device shown in fig. 3 viewed in the direction indicated by the arrow a 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings.

Fig. 1 is a perspective view of a discharge device according to a preferred embodiment of the present invention, and fig. 2 is a plan view of the discharge device shown in fig. 1 viewed along a direction indicated by an arrow a 1. As shown in fig. 1 and 2, the discharge device 1 includes: a conductive tube 15; a bolt 11 comprising opposite first and second end portions, and an intermediate portion (see in particular fig. 3 and 4), which is surrounded by a conductive tube 15; a first fastening member 12 for fixing a first end of the bolt 11 to the charging plate 10; (ii) a And a second fastener 16 configured to be fixed to a second end of the bolt 11.

The first fastener 12 includes a flat washer 121, a flat washer 122, a spring washer 123, and a nut 124. The

flat washers

121 and 122 are located at opposite sides of the charging plate 10 and attached to the charging plate 10. A spring washer 123 is located between nut 124 and flat washer 122 and is compressed when tightened. The first end of the bolt 11 passes through the flat washer 121, the charging member 10, the flat washer 122 and the spring washer 123 in this order and is fixedly coupled with the nut 124, whereby the first fastening member 12 firmly fixes the bolt 11 to the charging member 10.

The second fastener 16 includes a flat washer 161 and a ball nut 162, the flat washer 161 being located between one end of the contact tube 15 and the ball nut 162. The second end of the bolt 11 passes through the flat washer 161 and is screwed with the ball nut 162. Thereby confining the contact tube 15 between the flat washer 161 and the nut 124.

Fig. 3 is an exploded view of the discharge device shown in fig. 1, and fig. 4 is a schematic plan view of the discharge device shown in fig. 3 viewed in the direction indicated by an arrow a 2. As shown in fig. 3 and 4, the bolt 11 includes opposite first and

second end portions

111 and 112, and an intermediate portion 113 between the first and

second end portions

111 and 112. The flat washer 121, the charging member 10, the flat washer 122, and the spring washer 122 are sequentially fitted over the first end 111 of the bolt 11, the nut 124 is screwed to the first end 111 of the bolt 11, and the bolt 11 is firmly fixed to the charging plate 10 by compressing the spring washer 122.

The conductive tube 15 is made of galvanized copper and is in a tubular shape with two open ends. The inner diameter of the contact tube 15 is slightly larger than the diameter of the bolt 11, for example, the inner diameter of the contact tube 15 is 1 mm larger than the diameter of the bolt. When the contact tube 15 is fitted over the intermediate portion 113 of the bolt 11, on the one hand a good electrical contact between the contact tube 15 and the bolt 11 is ensured, and on the other hand the contact tube 15 can be rotated about the bolt 11.

The second end 112 of the bolt 11 passes through the flat washer 161 and then is fixedly connected with the ball nut 162, the flat washer 161 is used for being sleeved on the second end 112 of the bolt 11, and the ball nut 162 is screwed on the second end 112 of the bolt 11, so that the distance between the flat washer 161 and the nut 124 is equal to or slightly larger than the length of the electric conduction tube 15.

The mounting process of the discharge device 1 will be briefly described below. Firstly, a bolt 11 passes through a flat washer 121, a charged plate 10, a flat washer 122 and a spring washer 123; secondly, the nut 124 is screwed on the first end 111 of the bolt 11, and the spring washer 123 is pressed, so that the bolt 11 is fixed on the live plate 10; the conductive tube 15 is again fitted over the intermediate portion 113 of the bolt 11; finally, the flat washer 161 is fitted over the second end 112 of the bolt 11 and the ball nut 162 is tightened onto the second end 112 of the bolt 11.

When the capacitor needs to be repaired and maintained, the capacitor is disconnected from the circuit, one end of a grounding wire (not shown in the figure) is hooked or hooked on the conductive tube 15, and the residual electric charges on the charging plate 10 are discharged through the bolt 11, the conductive tube 15 and the grounding wire. After the capacitor is discharged, the capacitor can be safely detected and maintained, and the safety of maintenance personnel is improved.

When one end of the grounding wire is hung or hooked on the outer side wall of the conductive tube 15, the conductive tube 15 can freely rotate around the axis of the conductive tube 15, so that when the grounding wire moves or is placed at different positions, the conductive tube 15 can correspondingly rotate along with the movement and the position of the power connection wire, one terminal of the grounding wire is prevented from being clamped on the discharging device 1 in the movement process, on one hand, the grounding wire and the conductive tube 15 are kept in good electric connection, so that discharging can be effectively carried out, and on the other hand, an operator can conveniently hang one terminal of the grounding wire on the conductive tube 15 and take one terminal of the grounding wire off the conductive tube 15 by means of the insulating rod.

The first fastening member 12 is used to fix the bolt 11 on the live plate 10, wherein the

flat washers

121 and 122 increase the contact surface and friction force of the nut 124 during tightening, so that the nut 124 can firmly fix the bolt 11, and the spring washer 123 increases the friction force between the nut 124 and the bolt 11, so as to prevent the nut 124 from loosening or falling off the bolt 11 during use.

The ball nut 162 and the flat washer 161 serve to restrict the movement of the contact tube 15 in the axial direction thereof, for making good electrical contact between the contact tube 15 and the intermediate portion 113 of the bolt 11. The ball nut 162 has a smooth surface, which can uniformize an electric field and reduce corona, preventing a point discharge from being formed on the surface thereof.

In other embodiments of the present invention, other cylinders with external threads, such as a screw rod and a stud, are used to replace the bolt 11 in the above embodiments.

In another embodiment of the present invention, the first end 111 of the bolt 11 is fixed to the live plate 10 by a fastener such as a screw.

In another embodiment of the present invention, the second fastening member 16 of the above embodiment is replaced by a fastening member such as a ball-shaped fixing member, wherein the ball-shaped fixing member is fixed to the second end portion 112 of the bolt 11 by screwing or welding, so as to limit the conductive tube 15 between the first fastening member and the second fastening member.

The utility model also provides a capacitor device, it is including the condenser that has electrified board 10 to and discharge device 1 in the above-mentioned embodiment, wherein electrified board 10 can be the electrified part of platelike such as capacitor frame, generating line row, and discharge device 1 fixes on electrified board 10.

Although the present invention has been described in connection with the preferred embodiments, it is not intended to limit the invention to the embodiments described herein, but rather, to include various changes and modifications without departing from the scope of the invention.

Claims

1. A discharge device for a charged plate, the discharge device comprising:

the conductive tube is sleeved at the middle part of the conductive column; and

2. The electrical discharge device of claim 1, wherein an inner sidewall of the conductive tube is in contact with the conductive post, and the conductive tube is configured to rotate about the conductive post.

3. The discharge device of claim 1, wherein the conductive post is a cylinder with external threads, and a first end portion thereof passes through the charging plate.

4. The electrical discharge apparatus of claim 3, wherein the conductive post is a bolt.

5. The electrical discharge apparatus of claim 3, wherein the first fastener comprises a first nut for securing the first end of the conductive post to the charged plate.

6. The discharge device of claim 5, wherein said first fastener further comprises a first flat washer and a second flat washer on opposite sides of said charged plate, said first flat washer, second flat washer and said first nut securing said first end of said conductive post to said charged plate.

7. The discharge device of claim 6, wherein the first fastener further comprises a spring washer positioned between the second flat washer and the first nut.

8. The discharge device of any of claims 1-7, wherein the second fastener comprises a second nut secured to the second end of the conductive post.

9. The discharge device of claim 8, wherein the second fastener further comprises a third flat washer positioned between the second nut and the end of the conductive tube.

10. The discharge device of claim 8, wherein the second nut is a ball nut.

11. A capacitor device, comprising:

a capacitor comprising a charged plate; and

the discharge device of any of claims 1 to 10, mounted on the charged plate.