CN108400074A - A kind of DC fuse assembly apparatus - Google Patents

Abstract

The invention relates to a DC fuse assembly device, which includes a base plate, a knife fuse switch, an alarm mounting seat and a travel switch; wherein, the knife fuse switch, the alarm mounting seat, and the travel switch are all installed on the base plate; The alarm mounting base is installed on both sides of the knife fuse switch; the travel switch is connected with the knife fuse switch; the knife fuse switch includes a plastic base, a box cover, an operating handle and a crank arm. In the DC fuse assembly device provided by the present invention, the main fuse is placed in the box cover, which reduces the risk of electric shock during operation caused by the external exposure of the DC fuse; on the one hand, the main fuse is realized by setting the knife fuse switch. On the other hand, it has a large electrical isolation distance to meet the requirements of safe operation; through the travel switch setting, using the principle of mechanical sequence breaking, the six operation steps of the traditional DC fuse group are simplified to One step, greatly improving work efficiency.

Description

A DC fuse assembly device

technical field

The present invention relates to the technical field of fuse application, and more specifically, to a DC fuse assembly.

Background technique

At present, the DC fuses of the DC power supply system used in substations are large-capacity, large-volume, and exposed ceramic fuses. A set of DC fuses consists of positive and negative ceramic bases, positive and negative main fuses, and positive and negative fuses. Alarm and related secondary wiring components. The upper and lower ends of each ceramic fuse base have high-current metal spring bayonets, and the main fuse is connected or disconnected from the DC main circuit through the high-current metal spring bayonets; fuse alarms are installed on both sides of the main fuse body It is used to monitor the working status of the main fuse and send the alarm signal of the main fuse, and send the alarm signal to the remote place through the secondary wiring, but the installation distance on site is small, and the distance between the positive and negative fuse alarms is generally 2 cm about.

During the regular inspection or maintenance of the DC system of the substation, it is necessary to switch the DC fuses, especially the outlet fuses of the battery pack. However, during the operation, it is difficult or difficult to remove the positive and negative main fuses Cause damage to the ceramic fuse base; before removing the positive and negative main fuses, you need to remove the four fuse alarms and take isolation measures; when removing the fuse alarms, you need to use a screwdriver for live operation, which may easily cause personal electric shock or Causes the secondary circuit to open. Therefore, when operating the DC fuse, there are problems of difficult operation, cumbersome operation steps, and low operating safety factor, which cannot meet the requirements of operating efficiency and operating safety factor of switching operation.

Contents of the invention

The present invention solves the problems of difficult operation, cumbersome operation steps, and low operational safety factor in the operation of DC fuses in the prior art, as well as technical defects that cannot meet the operational efficiency and operational safety requirements of switching operations. Provided is a direct current fuse assembly device.

For realizing above-mentioned purpose of the invention, the technical scheme that adopts is:

A DC fuse assembly device includes a base plate, a knife fuse switch, an alarm mounting seat, and a travel switch; wherein, the knife fuse switch, the alarm mounting seat, and the travel switch are all installed on the base plate; the alarm The installation seat is on both sides of the knife fuse switch; the travel switch is connected with the knife fuse switch.

In the above scheme, the bottom plate is used to fix the knife fuse switch, the alarm mounting seat and the travel switch, and the whole device is installed at the wiring site; the knife fuse switch is installed in the middle of the bottom plate, and the alarm mounting seat is installed on both sides of the knife fuse switch .

Wherein, the knife fuse switch includes a plastic base, a box cover, an operating handle and a crank arm; the plastic base is installed on the bottom plate, and a metal spring bayonet is provided on the plastic base; a main fuse is provided on the box cover The device bayonet is used to place the main fuse; the operating handle is set at one end of the box cover, and the crank arm is set at the other end of the box cover; the crank arm is connected with the travel switch; the crank arm is connected with the travel switch The travel switch is connected.

Wherein, the plastic base is connected to the box cover through a support shaft, and the box cover can rotate fan-shaped along the support shaft.

In the above scheme, the main fuse bayonet provided on the box cover is used to block the main fuse, and the metal spring bayonet provided on the plastic base is used to connect with the metal contacts at both ends of the main fuse; The operating handle on the cover drives the cover to rotate fan-shaped around the support shaft, and is set between the crank arm of the cover and the metal contact spring of the travel switch to perform corresponding extrusion and retracting actions, that is, to realize the opening and closing operation of the travel switch .

Wherein, the box cover is provided with a transparent viewing port.

In the above solution, the working state of the main fuse can be visually observed through the transparent observation port provided on the box cover, which is convenient for the staff to check and maintain the fuse.

Wherein, the plastic base is also provided with a connection terminal, and the connection terminal is connected to the metal spring bayonet.

In the above solution, the circuit connection of the main fuse is realized by connecting the connecting terminal with the external wire.

Wherein, the number of the main fuse bayonet is 6; the number of the alarm mounting base, travel switch and crank arm is 2.

In the above scheme, the staff put the main fuse on the box cover, and then close the box cover to realize the connection between the main fuse and the metal spring bayonet; install the fuse alarm on the alarm mounting seat, and pass the wire and the stroke Switch connection; when disassembling the fuse, you only need to pull the operating handle, disconnect the travel switch through the crank arm, first cut off the connection of the fuse alarm, and then disconnect or take out the main fuse.

In the above scheme, the angle and operation of the box cover and the plastic base are as follows: at 0 degrees, the main fuse circuit is normally connected; Only the main fuse is not stressed; at 30 degrees, the upper contacts of the two main fuses are separated from the metal spring bayonet at the upper end of the plastic base; at 45 degrees, the lower contacts of the two main fuses are separated from the metal spring bayonet at the lower end of the plastic base; At 120 degrees, the cover of the knife fuse switch box and the main fuse can be disassembled.

Compared with prior art, the beneficial effect of the present invention is:

In the DC fuse assembly device provided by the present invention, the main fuse is installed in the box cover, which reduces the risk of electric shock during operation caused by the external exposure of the DC fuse. Easy operation and assembly and disassembly functions, on the other hand, it has a large electrical isolation distance to meet the requirements of safe operation; through the travel switch setting, using the principle of mechanical sequence breaking, the six operation steps of the traditional DC fuse group are simplified into one steps, greatly improving work efficiency.

Description of drawings

Figure 1 is a schematic diagram of the external structure of a DC fuse assembly.

Fig. 2 is a schematic side view of a DC fuse assembly.

Among them: 1. Bottom plate; 2. Knife fuse switch; 3. Alarm mounting seat; 4. Travel switch; 5. Transparent observation port; 6. Plastic base; 7. Box cover; 8. Operating handle;

Detailed ways

The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

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

Example 1

As shown in Figure 1 and Figure 2, a DC fuse assembly device includes a base plate 1, a knife fuse switch 2, an alarm mounting seat 3 and a travel switch 4; wherein, the knife fuse switch 2, the alarm mounting seat 3. The travel switch 4 is installed on the bottom plate 1; the alarm installation seat 3 is on both sides of the knife melting switch 2; the travel switch 4 is connected to the knife melting switch 2.

In the specific implementation process, the base plate 1 is used for fixedly installing the knife fuse switch 2, the alarm mounting seat 3 and the travel switch 4, and the whole device is installed at the wiring site; the knife fuse switch 2 is installed in the middle of the base plate 1, and the alarm is installed Seat 3 is installed on knife melting switch 2 both sides.

More specifically, the knife fuse switch 2 includes a plastic base 6, a box cover 7, an operating handle 8 and a crank arm 9; the plastic base 6 is installed on the bottom plate 1, and the plastic base 6 is provided with a metal spring bayonet The box cover 7 is provided with a main fuse bayonet for placing the main fuse; the operating handle 8 is set at one end of the box cover 7, and the crank arm 9 is set at the other end of the box cover 7; The crank arm 9 is connected with the travel switch 4 .

More specifically, the plastic base 6 is connected to the box cover 7 through a support shaft, and the box cover 7 can rotate fan-shaped along the support shaft.

In the specific implementation process, the main fuse bayonet provided on the box cover 7 is used to block the main fuse, and the metal spring bayonet provided on the plastic base 6 is used to connect with the metal contacts at both ends of the main fuse; By pulling the operating handle 8 on the box cover 7, the box cover 7 is driven to rotate fan-shaped around the support shaft, and the crank arm 9 arranged on the box cover 7 and the metal contact spring piece of the travel switch 4 are correspondingly squeezed and stretched back. action, that is, to realize the opening and closing operation of the travel switch 4.

More specifically, the box cover 7 is provided with a transparent viewing port 5 .

During the specific implementation process, the working state of the main fuse can be visually observed through the transparent observation port 5 provided on the box cover 7, which is convenient for the staff to check and maintain the main fuse.

More specifically, the plastic base 6 is also provided with a connection terminal, and the connection terminal is connected to the metal spring bayonet.

In a specific implementation process, the circuit connection of the main fuse is realized by connecting the connecting terminal with an external wire.

More specifically, the number of the main fuse bayonets is 6; the number of the alarm mounting base 3 , travel switch 4 and crank arm 9 is 2.

In the specific implementation process, the staff places the main fuse on the box cover 7, and then closes the box cover 7 to realize the connection between the main fuse and the metal spring bayonet; the fuse alarm is installed on the alarm mounting base 3 , connected to the travel switch 4 through wires; when disassembling the fuse, you only need to pull the operating handle 8, disconnect the travel switch 4 through the crank arm 9, first cut off the connection circuit of the fuse alarm, and then disconnect or take out the main fuse .

In the specific implementation process, the angle and operation of the box cover 7 and the plastic base 6 are as follows: at 0 degrees, the main fuse circuit is normally connected; at 10 degrees, two sets of travel switches 4 are activated, and a total of four fusing alarms in two groups are cut off at the same time At this time, the two main fuses are not stressed; at 30 degrees, the upper contacts of the two main fuses are separated from the metal spring bayonet of the plastic base 6; at 45 degrees, the lower contacts of the two main fuses are separated from the plastic base 6 Metal spring bayonet; at 120 degrees, the knife fuse switch 2 box cover 7 and the main fuse can be disassembled.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (7)

1. a kind of DC fuse assembly apparatus, it is characterised in that：Including bottom plate（1）, switch with knifeshaped fuse（2）, alarm mounting base （3）And travel switch（4）；Wherein, the switch with knifeshaped fuse（2）, alarm mounting base（3）, travel switch（4）It is installed in described Bottom plate（1）On；The alarm mounting base（3）In switch with knifeshaped fuse（2）Both sides；The travel switch（4）With the switch with knifeshaped fuse （2）Connection.

2. a kind of DC fuse assembly apparatus according to claim 1, it is characterised in that：The switch with knifeshaped fuse（2）Packet Include plastic feet（6）, box cover（7）, operating handle（8）And connecting lever（9）；The plastic feet（6）Mounted on the bottom plate（1） On, plastic feet（6）On be provided with metal spring bayonet；The box cover（7）On be provided with main fuse bayonet, for placing master Fuse；The operating handle（8）It is arranged in the box cover（7）One end, the connecting lever（9）It is arranged in box cover（7）The other end；Institute State connecting lever（9）With the travel switch（4）Connection.

3. a kind of DC fuse assembly apparatus according to claim 2, it is characterised in that：The plastic feet（6）With The box cover（7）By supporting axis connection, the box cover（7）Can be in fan-shaped rotary along support shaft.

4. a kind of DC fuse assembly apparatus according to claim 3, it is characterised in that：The box cover（7）Upper setting There is transparent viewing port（5）.

5. a kind of DC fuse assembly apparatus according to claim 4, it is characterised in that：The main fuse bayonet Quantity is 6.

6. a kind of DC fuse assembly apparatus according to claim 4, it is characterised in that：The plastic feet（6）Also It is provided with connecting terminal, the connecting terminal and the metal spring bayonet connection.

7. a kind of DC fuse assembly apparatus according to claim 6, it is characterised in that：The alarm mounting base （3）, travel switch（4）And connecting lever（9）Quantity be 2.