CN216649007U

CN216649007U - Coal mining machine electric cabinet for mining permafrost layer

Info

Publication number: CN216649007U
Application number: CN202123091610.1U
Authority: CN
Inventors: 王子海; 毛志冬; 王海云
Original assignee: Wuxi Chuangli Mining Equipment Co ltd
Current assignee: Wuxi Chuangli Mining Equipment Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-05-31
Anticipated expiration: 2031-12-10

Abstract

The utility model relates to an electric cabinet of a coal mining machine for exploiting a permafrost layer, which comprises a box body, wherein the top and the bottom of an installation surface in the box body are respectively fixed with a limit bracket, a wiring board is arranged below the limit bracket at the top, one side of the wiring board is electrically connected with a temperature and humidity monitoring device, a main control screen is electrically connected below the wiring board, the upper end of the main control screen is electrically connected with the temperature and humidity monitoring device through the wiring board, one end of the main control screen is electrically connected with a heating switch, a vacuum contactor is electrically connected below the vacuum contactor, the wiring board is respectively arranged above and below the vacuum contactor, one side of the vacuum contactor is electrically connected with a power transformer, one side of the power transformer is electrically connected with an electric reactor, a frequency converter is electrically connected below the electric reactor, auxiliary heating devices are arranged around the frequency converter, and the auxiliary heating devices are controlled through the heating switch And faults such as grounding and the like enable the electric cabinet to be integrally suitable for coal mining operation in an extremely cold environment.

Description

Coal mining machine electric cabinet for mining permafrost layer

Technical Field

The utility model relates to the field of electric control equipment, in particular to an electric control box of a coal mining machine for mining permafrost layers.

Background

At present, the use temperature of a coal mining machine is basically over 0 ℃ in the field of coal mining machines, the coal mining machine is extremely lack of use on an extremely cold working surface (20 ℃ below zero), one of the main reasons is that the working surface is wet in the coal mining process, a frequency converter in an electric cabinet of the coal mining machine generates heat in the use process, the temperature is reduced after the coal mining machine is stopped, the coal mining machine can dew due to moisture (an explosion-proof electric control system needs an air gap to prevent explosion and water), and faults such as short circuit and grounding are easy to occur due to dew condensation when the coal mining machine is restarted.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, in order to overcome the defects of the prior art, the utility model aims to provide the electric cabinet of the coal mining machine for mining the permafrost layer, which has the advantages of keeping the temperature in the electric cabinet stable, avoiding the occurrence of short circuit, grounding and other faults due to dewing caused by temperature reduction when a frequency converter in the electric cabinet is restarted, and enabling the electric cabinet to be integrally suitable for coal mining operation of an extremely cold working surface (20 ℃ below zero).

The technical purpose of the utility model is realized by the following technical scheme: the coal mining machine electric cabinet for mining the permafrost layer comprises a box body, wherein a box door is movably connected to the opening surface of the box body, a lock catch is arranged on the box door, limiting supports are fixed at the top and the bottom of an installation surface in the box body, a wiring board is arranged below the limiting supports at the top, one side of the wiring board is electrically connected with a temperature and humidity monitoring device, a main control screen is electrically connected below the wiring board, the upper end of the main control screen is electrically connected with the temperature and humidity monitoring device through the wiring board, one end of the main control screen is electrically connected with a heating switch, a vacuum contactor is electrically connected below the main control screen, the vacuum contactor is provided with the wiring board vertically, one side of the vacuum contactor is electrically connected with a power transformer, one side of the power transformer is electrically connected with a reactor, a frequency converter is electrically connected below the reactor, and auxiliary heating devices are arranged around the frequency converter, the auxiliary heating device is controlled through a heating switch, the main control screen, the heating switch, the vacuum contactor, the power transformer, the reactor and the frequency converter are fixed on a mounting surface in the box body through positioning supports, an aerial plug interface is arranged on one side of the box body, and the aerial plug interface is electrically connected with a wiring board.

By adopting the technical scheme, the temperature and humidity of the electric cabinet can be effectively detected by the temperature and humidity detection device, so that alarming and protection are realized, the large current can be effectively connected and disconnected by the vacuum contactor, the rated operation voltage is high, and the electric cabinet is suitable for severe environments and flammable and explosive dangerous places; the power transformer can supply power for the electric dragging system; the arrangement of the reactor can improve the voltage distribution on a long power transmission line, so that the reactive power in the line is balanced as far as possible in the light load, the unreasonable flow of the reactive power is prevented, the power loss on the line is reduced, the arrangement of the auxiliary heating device can increase the temperature around the frequency converter, and the phenomenon that the frequency converter is dewed due to moisture and short-circuit phenomena and other faults affect normal work in an extremely cold environment is avoided.

Further setting: and a circuit housing is arranged on the mounting surface in the box body and protects all circuits in the circuit housing.

Further setting: the temperature and humidity detection device comprises a temperature and humidity detector, the temperature and humidity detector is installed on a positioning support, the positioning support is fixed on an installation surface in the box body, one side of the temperature and humidity detector is electrically connected with a relay, one side of the relay is electrically connected with a wiring board, and the relay is also installed on the positioning support.

Further setting: the box body is characterized in that heat preservation cotton blocks are attached to the periphery of the inner wall of the box body, and heat preservation cotton blocks are attached to the inner wall of the box door.

Through adopting above-mentioned technical scheme, the temperature that can effectual assurance electric cabinet box be moderate in the setting of heat preservation cotton board, plays certain heat preservation effect, avoids the box internal temperature to hang down excessively to lead to components and parts dewfall to break down.

Further setting: the auxiliary heating device comprises three-phase heating pipes, the three-phase heating pipes are respectively arranged on two sides of the frequency converter, heat-insulating cotton rings are arranged on the peripheries of the three-phase heating pipes, and the heat-insulating cotton rings are fixed on the mounting surface in the box body.

Through adopting above-mentioned technical scheme, the setting of cotton ring that keeps warm can be when the heating of three-phase heating pipe, and the temperature is kept, reduces the heat and scatters and disappears to the maximum steady operation of guaranteeing the converter, because of the temperature reduces and the dewfall, thereby faults such as short circuit, ground connection appear.

In summary, the utility model has the following advantages: the overall structure can keep the temperature in the electric cabinet stable, and the electric cabinet is prevented from dewing due to temperature reduction when the frequency converter in the electric cabinet is restarted, so that faults such as short circuit and grounding occur, and the electric cabinet can be integrally adapted to coal mining operation of an extremely cold working face (20 ℃ below zero).

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, and are not to be considered limiting of the utility model, in which:

fig. 1 is a front view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a cross-sectional view of fig. 2 of the present invention.

Fig. 4 is a component layout connection diagram of the present invention.

In the figure, 1, a box body; 101. an aerial plug interface; 2. a box door; 21. locking; 3. a heat preservation cotton board; 4. a temperature and humidity detector; 5. a wiring board; 6. a circuit housing; 7. a master control screen; 8. a heating switch; 9. a power transformer; 10. a reactor; 11. a vacuum contactor; 12. a heat-preserving cotton ring; 13. a three-phase heating pipe; 14. a frequency converter; 15. a limiting bracket; 16. positioning the bracket; 17. a relay.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of embodiments, which is to be read in connection with the accompanying drawings. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1: an electric cabinet of a coal mining machine for mining a permafrost layer, as shown in figures 1-4, comprises a box body 1, a box door 2 is movably connected with the opening surface of the box body 1, a lock catch 21 is arranged on the box door 2, heat preservation cotton plates 3 are adhered on the periphery of the inner wall of the box body 1, the heat preservation cotton plates 3 are also adhered on the inner wall of the box door 2, a limiting bracket 15 is fixed on the top and the bottom of the mounting surface in the box body 1, a wiring board 5 is arranged below the limiting bracket 15 on the top, one side of the wiring board 5 is electrically connected with a temperature and humidity monitoring device, a main control screen 7 is electrically connected with the upper end of the main control screen 7 through the wiring board 5, the temperature and humidity detecting device comprises a temperature and humidity detector 4, the temperature and humidity detector 4 is arranged on a positioning bracket 16, the positioning bracket 16 is fixed on the mounting surface in the box body 1, one side of the temperature and humidity detector 4 is electrically connected with a relay 17, one side of the wiring board 5 is electrically connected with the relay 17, the relay 17 is also arranged on a positioning support 16, one end of the main control screen 7 is electrically connected with a heating switch 8, a vacuum contactor 11 is electrically connected below the main control screen 7, wiring boards 5 are arranged on the upper part and the lower part of the vacuum contactor 11, a power transformer 9 is electrically connected on one side of the vacuum contactor 11, a reactor 10 is electrically connected on one side of the power transformer 9, a frequency converter 14 is electrically connected below the reactor 10, an auxiliary heating device is arranged around the frequency converter 14 and controlled by the heating switch 8, the auxiliary heating device comprises a three-phase heating pipe 13, the three-phase heating pipe 13 is respectively arranged on two sides of the frequency converter 14, a heat-insulating cotton ring 12 is arranged around the three-phase heating pipe 13, the heat-insulating cotton ring 12 is fixed on a mounting surface in the box body 1, the main control screen 7, the heating switch 8, the vacuum contactor 11, the power transformer 9, the reactor 10 and the frequency converter 14 are all fixed on the mounting surface in the box body 1 through the positioning support 16, an aerial inserting interface 101 is arranged on one side of the box body 1, the aerial inserting interface 101 is electrically connected with the wiring board 5, a circuit housing 6 is installed on the installation surface in the box body 1, and all circuits are protected in the circuit housing 6 by the circuit housing 6.

In the embodiment of the utility model, in the application mode of the frequency converter 14 in the electric cabinet in an extremely cold coal seam (20 ℃ below zero), the heating switch 8 is used for attracting and controlling the three-phase heating pipes 13 on two sides of the frequency converter 14, the frequency converter 14 is heated to about 25 ℃ for 20-30min to remove dew and moisture of the frequency converter 14, the temperature and the humidity of the frequency converter 14 are monitored through the temperature and humidity detector 4 and participate in alarm and protection, if the frequency converter 14 is heated up after the power of a coal mining machine electric appliance system with overhigh humidity is cut off, the vacuum contactor 11 is used for attracting the power transformer 9, the reactor 10 and the frequency converter 14 and supplying power in turn, and the frequency converter 14 works normally.

While the utility model has been described in further detail with reference to specific embodiments thereof, it is not intended that the utility model be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related arts, the extension, operation method, and data replacement shall fall within the scope of the present invention based on the technical idea of the present invention.

Claims

1. Coal-winning machine electric cabinet of permafrost layer exploitation, its characterized in that: the box comprises a box body (1), wherein a box door (2) is movably connected to an opening surface of the box body (1), a lock catch (21) is arranged on the box door (2), limiting supports (15) are fixed to the top and the bottom of an inner mounting surface of the box body (1), a wiring board (5) is arranged below the limiting support (15) at the top, a temperature and humidity monitoring device is electrically connected to one side of the wiring board (5), a main control screen (7) is electrically connected to the lower portion of the wiring board (5), the temperature and humidity monitoring device is electrically connected to the upper end of the main control screen (7) through the wiring board (5), a heating switch (8) is electrically connected to one end of the main control screen (7), a vacuum contactor (11) is electrically connected to the lower portion of the main control screen (7), the wiring board (5) is arranged above and below the vacuum contactor (11), and a power transformer (9) is electrically connected to one side of the vacuum contactor (11), power transformer (9) one side electricity is connected with reactor (10), reactor (10) below electricity is connected with converter (14), converter (14) are installed all around and are assisted the heat facility, it controls through heating switch (8) to assist the heat facility, main control screen (7), heating switch (8), vacuum contactor (11), power transformer (9), reactor (10) and converter (14) are all fixed on the installation face in box (1) through locating support (16), box (1) one side is equipped with navigation plug interface (101), navigation plug interface (101) electricity connection board (5).

2. The electric cabinet of the coal mining machine for mining permafrost layers as claimed in claim 1, wherein: a circuit housing (6) is mounted on a mounting surface in the box body (1), and all circuits are protected in the circuit housing (6) by the circuit housing (6).

3. The electric cabinet of the coal mining machine for mining permafrost layers as claimed in claim 1, wherein: the temperature and humidity detection device comprises a temperature and humidity detector (4), the temperature and humidity detector (4) is installed on a positioning support (16), the positioning support (16) is fixed on an installation surface in the box body (1), one side of the temperature and humidity detector (4) is electrically connected with a relay (17), one side of the relay (17) is electrically connected with a wiring board (5), and the relay (17) is also installed on the positioning support (16).

4. The electric cabinet of the coal mining machine for mining permafrost layers as claimed in claim 1, wherein: the box is characterized in that heat-insulating cotton plates (3) are attached to the periphery of the inner wall of the box body (1), and the heat-insulating cotton plates (3) are attached to the inner wall of the box door (2).

5. The electric cabinet of the coal mining machine for mining permafrost layers as claimed in claim 1, wherein: the auxiliary heating device comprises three-phase heating pipes (13), wherein the three-phase heating pipes (13) are respectively installed on two sides of a frequency converter (14), heat-preservation cotton rings (12) are arranged on the peripheries of the three-phase heating pipes (13), and the heat-preservation cotton rings (12) are fixed on the installation surface in the box body (1).