CN203367776U - Knife switch box - Google Patents

Abstract

The utility model provides a knife box, which includes a box body, cables, cable holders, transition terminals, fuses, AC contactors, time relays, leakage protection switches, air switches and sockets; the box body is a plastic cuboid box body parts; the front panel of the front panel of the box body is provided with a pause button installation hole and a socket installation hole; the lower end plate of the box body is provided with a cable entry hole; cable holders, transition terminals, fuses, AC contactors, time Relays, leakage protection switches, and air switches are all fixedly installed in the box; sockets are fixedly installed on the front panel of the box; fuses, AC contactors, time relays, leakage protection switches, air switches, and sockets are connected in series in sequence. The utility model is easy to install, light and durable, low in cost and good in safety, and is suitable for popularization and application in rural areas.

Description

a knife box

technical field

The utility model relates to power distribution equipment, in particular to a knife box used for power distribution in rural fields.

Background technique

At present, with the improvement of the degree of mechanization of agricultural production, in the rural fields, the knife box for low-voltage line connection is widely used to provide power interfaces for temporary electricity such as wheat and rice threshing and pumping irrigation in spring and autumn. The switch box has gradually become an indispensable electricity facility for agricultural production such as threshing and fetching water for rural users. The common knife box is usually equipped with a manual knife switch in a simple iron shell, which has a short service life outdoors; before use, it needs to be temporarily mounted on the power distribution pole of the transmission line to connect the power cables, and after use, it needs to be mounted again. It is labor-intensive and time-consuming to remove the cables by rods; there is no leakage protection and short-circuit tripping device, and the iron shell is easy to conduct electricity, which is poor in safety and may easily cause electric shock accidents; there is no power consumption time control device, and it is convenient to use electricity without permission, which makes it difficult to manage power consumption. At present, there are also switch knife boxes with electricity purchase card meters and stainless steel boxes, but this type of switch knife box has a high cost and is not suitable for popularization and application in rural areas.

Utility model content

The purpose of the utility model is: to overcome the deficiencies of the prior art, to provide a switch knife box suitable for popularization and application in rural areas, which is easy to install, light and durable, low in cost, good in safety and controls the power consumption time.

The technical scheme of the utility model is: the switch knife box of the utility model, and its structural characteristics are: including the box body, cables, cable holders, transition terminals, fuses, AC contactors, time relays, leakage protection switches, air switches and sockets;

The above-mentioned box body is a plastic cuboid box body; the front panel of the front panel of the box body is provided with a pause button installation hole and a socket installation hole; the lower end plate of the box body is provided with a cable entry hole;

Cable holders, transition terminals, fuses, AC contactors, time relays, leakage protection switches, and air switches are all fixedly installed in the box; the socket is fixedly installed in the socket installation hole on the front panel of the box and fixed by the cable After the fuse is fixed, it is electrically connected to the incoming terminal of the fuse through the transition terminal; the incoming terminal of the AC contactor is electrically connected to the outgoing terminal of the fuse; the incoming terminal of the time relay is electrically connected to the outgoing terminal of the AC contactor; leakage The incoming line end of the protection switch is electrically connected with the outgoing line end of the time relay; the incoming line end of the air switch is electrically connected with the outgoing line end of the leakage protection switch; the socket is electrically connected with the outgoing line end of the air switch.

A further solution is: also includes a contactor opening control button, a contactor closing control button, a contactor normal indicator light, a contactor fault indicator light and a pause button; the above-mentioned contactor opening control button, contactor closing control button, contactor The normal indicator light, the contactor fault indicator light and the pause button are all electrically connected with the AC contactor respectively.

A further solution is: the front panel of the above-mentioned box body is a transparent plastic part; the transition terminal is a copper-aluminum transition terminal; the time relay is a digital display time relay.

A further solution is: the leakage protection switch and the air switch mentioned above are Legrand 2P40A two-in-one air switch with leakage protection.

The utility model has positive effects: (1) The knife box of the utility model is easy to install, light and durable, and low in cost, and is suitable for popularization and application in rural areas. (2) The knife box of the utility model is separated from the outside, so that the user cannot touch the live line, has the function of leakage protection, and has good safety. (3) The knife box of the utility model has a time control function, and can control the power consumption time efficiently. (4) The knife box of the utility model is fixedly installed in the field where it needs to be used, and has a long service life. It only needs to be operated on the knife box when in use, and there is no need to connect the cables before and after use, saving time and effort And reduce the occurrence of safety accidents.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the schematic diagram of the installation and use state of the utility model shown in Fig. 1;

FIG. 3 is a schematic diagram of the internal electrical connections of the utility model shown in FIG. 1 .

The reference signs in the above-mentioned accompanying drawings are as follows:

Box 1, cable 2, cable holder 3, transition post 4, fuse 5,

AC contactor 6, contactor open control button 61, contactor close control button 62, contactor normal indicator light 63, contactor fault indicator light 64, pause button 65,

Time relay 7, leakage protection switch 8, air switch 9, socket 10.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

(Example 1)

See Fig. 1 to Fig. 3, the knife box of this embodiment is mainly composed of box body 1, cable 2, cable holder 3, transition terminal 4, fuse 5, AC contactor 6, time relay 7, leakage protection switch 8. The air switch 9 and the socket 10 are composed.

The material of the box body 1 is plastic. The box body 1 is a rectangular parallelepiped box body part facing up and down. The front panel of the box body 1 is transparent plastic. The front panel of the box body 1 is provided with a pause button installation hole and a socket installation hole; the lower end panel of the box body 1 is provided with a cable entry hole.

Cable 2 is a three-phase four-wire cable. One end of the cable 2 is electrically connected to the power transmission and distribution line; the other end of the cable 2 is inserted into the box body 1 through the cable entry hole on the lower end plate of the box body 1 .

The cable holder 3 is arranged in the box body 1 and is close to the cable entry hole on the lower end plate of the box body 1 . The cable holder 3 is used to fix the inserted cable 2 in the box.

The transition terminal 4 is arranged in the box body 1 and is used for branching and connecting the cables 2 . The transition post 4 is preferably a copper-aluminum transition post.

Fuse 5 is used for overcurrent protection when using electricity. Fuse 5 In this embodiment, the fuse of Shanghai Kuanglong Zhenghao RT14-20 model is preferably used.

AC contactor 6 In this embodiment, the 220V CJ-2-40A AC contactor produced by Delixi Electric Co., Ltd. is preferably used. The AC contactor 6 is provided with a contactor on control button 61 , a contactor off control button 62 , a contactor normal indicator light 63 , a contactor fault indicator light 64 and a pause button 65 . The contactor open control button 61 , the contactor close control button 62 , the contactor normal indicator light 63 , the contactor fault indicator light 64 and the pause button 65 are all electrically connected to the AC contactor 6 . The contactor open control button 61 is used to connect the AC contactor 6; the contactor off control button 62 is used to close the AC contactor 6; the contactor normal indicator light 63 is used to display that the AC contactor 6 is in a normal working state; the contactor failure The indicator light 64 is used to display that the AC contactor 6 is in a fault working state. The pause button 65 is used to temporarily pause the connection of the AC contactor 6 during use.

Time relay 7 In this embodiment, the model DH48S-S digital display time relay of Tianzheng Group is preferably used. The time relay 6 is used for measuring and controlling the power consumption time, and when the set power consumption time is reached, it will automatically cut off the power.

The leakage protection switch 8 is used for short circuit and leakage protection; the air switch 9 is used for connecting or disconnecting the power supply of the socket 10 . In this embodiment, the leakage protection switch 8 and the air switch 9 are preferably Legrand 2P40A two-in-one air switch with leakage protection.

The socket 10 is fixedly installed in the socket installation hole on the front panel of the box body 1, and is used for plugging in the output power when in use.

The cable 2 is introduced into the box body 1 and fixed by the cable holder 3, and then electrically connected to the incoming line end of the fuse 5 through the transition terminal 4; the incoming line end of the AC contactor 6 is electrically connected to the outgoing line end of the fuse 5; time The incoming line end of the relay 7 is electrically connected to the outgoing line end of the AC contactor 6; the incoming line end of the leakage protection switch 8 is electrically connected to the outgoing line end of the time relay 7; Electrical connection; the socket 10 is electrically connected to the a, b, and c three-phase outlets of the air switch 9.

To sum up, the switch box of this embodiment is easy to install, light and durable, and low in cost, and is suitable for popularization and application in rural areas; the inside and outside are separated, the user cannot touch the live line, and it has the function of leakage protection and good safety; it has time control Function, energy-efficient control of electricity consumption time; fixed installation in the field where it needs to be used, long service life, only need to operate on the switch box when in use, no need to connect cables before and after use, saving time and effort and reducing occurrence of security incidents.

The above embodiments are descriptions of specific implementations of the present utility model, rather than limitations of the present utility model. Those skilled in the art can also make various transformations and changes without departing from the spirit and scope of the present utility model. Changes to obtain corresponding equivalent technical solutions, so all equivalent technical solutions should be included in the patent protection scope of the present utility model.

Claims (4)

1. A knife box, characterized in that it includes box body (1), cable (2), cable holder (3), transition terminal (4), fuse (5), AC contactor (6) , time relay (7), leakage protection switch (8), air switch (9) and socket (10); The box body (1) is a plastic cuboid box body; the front panel of the front panel of the box body (1) is provided with a pause button installation hole and a socket installation hole; the lower end plate of the box body (1) is provided with a cable access hole; Cable holder (3), transition terminal (4), fuse (5), AC contactor (6), time relay (7), leakage protection switch (8), and air switch (9) are all fixed in the box body (1); the socket (10) is fixedly installed in the socket installation hole on the front panel of the box body (1) and is fixed by the cable holder (3) and passed through the transition terminal (4) and the fuse (5) The incoming terminal of the AC contactor (6) is electrically connected to the outgoing terminal of the fuse (5); the incoming terminal of the time relay (7) is electrically connected to the outgoing terminal of the AC contactor (6) ; The incoming line end of the leakage protection switch (8) is electrically connected to the outgoing line end of the time relay (7); the incoming line end of the air switch (9) is electrically connected to the outgoing line end of the leakage protection switch (8); the socket (10) is connected to the The outlet end of the air switch (9) is electrically connected. 2. The knife box according to claim 1, characterized in that it also includes a contactor open control button (61), a contactor close control button (62), a contactor normal indicator light (63), a contactor fault indication light (64) and pause button (65); the contactor open control button (61), contactor off control button (62), contactor normal indicator light (63), contactor fault indicator light (64) and The pause buttons (65) are electrically connected to the AC contactor (6) respectively. 3. The knife box according to claim 1, characterized in that: the front panel of the box (1) is a transparent plastic part; the transition terminal (4) is a copper-aluminum transition terminal; the time relay (7 ) is a digital display time relay. 4. The knife box according to claim 1, characterized in that: said leakage protection switch (8) and air switch (9) are Legrand 2P40A two-in-one air switch with leakage protection.

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