Mining rapid switching isolation conversion device

Abstract

The utility model provides a mining rapid switching isolation conversion device, and belongs to the technical field of isolation conversion devices. The problems that when a certain line breaks down or a working starter or a frequency converter breaks down at present, a quick plug needs to be disassembled and then another standby device needs to be installed, operation is tedious, and underground production is affected are solved. Comprising a cabinet body, the cabinet body is internally provided with a body cavity, the body cavity comprises at least one high-voltage body cavity and a secondary wire outlet cavity, and the high-voltage body cavity is internally provided with a disconnecting link type disconnecting switch of a primary line, a display screen and primary protection equipment. The secondary wire outlet cavity is used for enabling signal transmission wires of the display and the primary protection equipment to penetrate out of the cabinet body and then to be connected with an upper-stage starter or frequency converter and a lower-stage motor; one side plate of the cabinet body is provided with an isolation handle and scram button locking mechanism and an incoming and outgoing line quick plug. The quick switching device is applied to quick switching of starters of different lines of a mine.

Description

Technical Field

[0001] The utility model provides a mine-used rapid switching isolation conversion device, belonging to the technical field of isolation conversion devices. Background Art

[0002] The mine flameproof and intrinsically safe fast switching isolating transfer switch is suitable for mines containing explosive gas and coal dust. As a mine flameproof mobile fast switching device, it supplies and transforms power to high-power coal mining machines, roadheaders, scraper conveyors, crushers, transfer machines, emulsion pumping stations and other equipment in the comprehensive mechanized coal mining face in the AC 50Hz, rated voltage 3300V, 1140(660)V power supply line. It uses a starter or frequency converter. When a line fails, it can quickly switch to another line to ensure uninterrupted operation of underground equipment.

[0003] Although maintenance personnel frequently inspect starters or inverters according to standard procedures, the inspections are mainly focused on tightening screws. In order to ensure the normal operation of equipment, two circuits are currently prepared on the coal mining face. The two devices are designed with one motor and one working starter or inverter. When a circuit fails or the working starter or inverter fails, the quick plug needs to be removed and another spare device installed. The operation is cumbersome and affects underground production. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model aims to solve the technical problem of providing an improvement in the hardware structure of a mine-used rapid switching isolation conversion device.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a mine-used fast-switching isolation conversion device, comprising a cabinet, a door cover is provided on the front of the cabinet, a display and an observation window are installed on the door cover, a body cavity is provided inside the cabinet, an electrical lock is provided between the door cover and the body cavity, the body cavity comprises at least one high-voltage body cavity and a secondary outlet cavity, a knife-type isolating switch, a display screen and a primary protection device of a primary circuit are installed in the high-voltage body cavity, and the secondary outlet cavity is used to pass the signal transmission lines of the display and the primary protection device out of the cabinet and then connect them to the upper starter or inverter and the lower motor;

[0006] An isolation handle, an emergency stop button locking mechanism, and an inlet and outlet quick plug are provided on one side panel of the cabinet. The inlet and outlet quick plug is used to connect the power supply of the upper-level main and standby equipment of a line to the high-voltage body cavity, and connect the power supply to the lower-level equipment;

[0007] The isolation handle and emergency stop button locking mechanism includes an emergency stop button, an isolation handle and an isolation locking disk installed on a side panel of the cabinet. The isolation handle is connected to the operating rod of the knife-type isolation switch through a universal coupling. Two notches are provided on the isolation locking disk. The emergency stop button is located in one notch in the non-pressed state. The isolation handle is fixedly connected to the isolation locking disk.

[0008] The emergency stop button includes an emergency stop button copper sleeve, an emergency stop button head, an emergency stop button shaft, an emergency stop button fixing pin and an emergency stop spring. The emergency stop button copper sleeve is mounted on the emergency stop button shaft, and the emergency stop button head and the emergency stop button shaft are fixedly connected by the emergency stop button fixing pin. The emergency stop spring is installed between the emergency stop button head and the emergency stop button copper sleeve.

[0009] The isolation handle includes an isolation shaft, an isolation copper sleeve and an isolation handle head. The isolation copper sleeve is mounted on the isolation shaft. One end of the isolation shaft is connected to the isolation handle head. The other end of the isolation shaft is connected to a universal coupling. The isolation shaft is fixedly connected to the isolation locking disk.

[0010] A door cover is also provided on the back of the cabinet body. The door cover is connected to the cabinet body through a rotating shaft, and the lower end of the door cover is clamped with the cabinet body through a flange.

[0011] The door cover is two screw doors that are arranged on the left and right and can be opened and closed.

[0012] A travel switch is arranged between the door cover and the body cavity.

[0013] The primary protection equipment includes a main control transformer, a voltage transformer, a current transformer, an emergency stop button, a PLC module and a display screen.

[0014] An explosion-proof partition is provided in the secondary outlet cavity, and a through-wall terminal is provided on the explosion-proof partition. The signal transmission lines of the display and the primary protection device pass through the through-wall terminal and then pass out from the secondary outlet horn mouth provided on one side panel of the cabinet.

[0015] There are three high-voltage body cavities, which can be connected to a main circuit and a backup circuit of three motors respectively.

[0016] The knife-type isolating switch adopts an 800A / 3300V-level isolating switch.

[0017] A waterproof groove is provided on the flange, and a rubber strip is installed in the waterproof groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the present invention introduces two devices of two lines into the same cavity. When a piece of equipment on one line fails, it can quickly switch to the other line by rotating the knife switch type isolation, thereby ensuring uninterrupted coal mining work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 This is a front view structural diagram of the utility model after the front door is opened;

[0021] Figure 2 It is a left view of the utility model;

[0022] Figure 3 It is a right side view of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the isolation and emergency stop lock of the utility model, namely Figure 3 Cross-sectional view of AA;

[0024] Figure 5 This is a schematic diagram of the connection of the input and output lines of the utility model;

[0025] In the figure: 1 is the front door, 2 is the input and output quick plug, 3 is the knife switch type disconnector, 4 is the main body cavity, 5 is the secondary outlet cavity, 6 is the secondary outlet horn mouth, 7 is the display, 8 is the isolation handle and emergency stop button locking mechanism, 9 is the emergency stop button copper sleeve, 10 is the emergency stop button, 11 is the emergency stop button shaft, 12 is the emergency stop button fixing pin, 13 is the section I universal shaft, 14 is the section II universal shaft, 15 is the isolation shaft, 16 is the isolation copper sleeve, 17 is the emergency stop spring, 18 is the isolation handle, 19 is the isolation handle head, 20 is the screw, 21 is the isolation locking disk, 22 is the wall terminal, and 23 is the high-voltage main body cavity. DETAILED DESCRIPTION

[0026] like Figures 1 to 5 As shown, the utility model provides a mine-use fast switching isolation conversion device, including a cabinet body, a door cover is installed on the front and back of the cabinet body, the door cover is connected to the cabinet body through a rotating shaft, the door cover is fixed to the cabinet body by screws, the lower end of the door cover is clamped with the cabinet body through a flange, a waterproof groove is provided on the flange, and a rubber strip is installed in the waterproof groove; in this embodiment, the cabinet body is provided with two door covers on the front and back, and the left and right door covers can be opened separately, wherein the two door covers on the front of the cabinet body are called front doors 1, as shown in FIG. Figure 1 and Figure 5 As shown, a display 7 and an observation window are installed on the right front door. The display 7 displays the current, voltage and various parameters passing through. The operation status of the equipment inside the cabinet can be viewed from outside the cabinet through the observation window.

[0027] A body cavity 4 is provided in the cabinet, and the body cavity 4 includes at least one high-pressure body cavity 23 and a secondary outlet cavity 5, and an explosion-proof partition is provided between the secondary outlet cavity 5 and the cabinet; a plurality of input and output line quick plugs 2 and an isolation handle and an emergency stop button locking mechanism 8 are provided on the left side panel of the cabinet, and a plurality of input and output line quick plugs 2, a secondary outlet horn 6 and an isolation handle and an emergency stop button locking mechanism 8 are provided on the right side panel of the cabinet; in this embodiment, two high-pressure body cavities 23 are provided on the left side of the body cavity 4, and a secondary outlet cavity 5 and a high-pressure body cavity 23 are provided on the right side, and the two cavities are in an upper and lower position relationship, then the left side Two groups of isolation handles and emergency stop button locking mechanisms 8 are provided on the board, which are used to control the knife-type isolating switches 3 and the emergency stop button 10 in the two high-voltage body cavities 23 respectively. Six input and output line quick plugs 2 are also provided on the left panel, which are four input line quick plugs and two output line quick plugs respectively; one group of isolation handles and emergency stop button locking mechanisms 8 are provided on the right panel, which are used to control the knife-type isolation and emergency stop button in the high-voltage body cavity 23 on the right side. Three input and output line quick plugs 2 are provided on the right panel, which are two input line quick plugs and one output line quick plug respectively. Twelve secondary output line trumpet mouths 6 are also provided on the right panel.

[0028] A through-wall terminal 22 is also fixed in the secondary outlet cavity 5. The through-wall terminal 22 is set on the explosion-proof partition. The three high-voltage body cavities 23 are respectively installed with a primary line knife-type disconnector, a display screen, and a primary protection device. The display screen and the primary protection device transmit data to the upper or lower level through the through-wall terminal 22. Each high-voltage body cavity 23 is also provided with a corresponding PLC module. The PLC module is mainly used to control the power supply and realize leakage and overcurrent signal collection, and information display and upload functions. Therefore, the information of the lower-level motor or the upper-level starter and inverter is collected through the through-wall terminal 22 installed on the explosion-proof partition, and the display screen and other components of the high-voltage body cavity 23 are controlled. At the same time, if a certain line or starter output line of a certain motor fails, the motor can be stopped by pressing the emergency stop button 10, and the isolation handle 18 is turned to quickly switch to another device. Then, the isolation handle 18 is turned to make the emergency stop button 10 pop out, and the starter can be operated to close the switch, thereby starting the motor. In this embodiment, the two high-voltage body cavities 23 on the left are respectively equipped with a first knife-type disconnector, a first main control transformer, a first voltage transformer, a first current transformer, a first emergency stop button, a first PLC module, a first display screen, and a second knife-type disconnector, a second main control transformer, a second voltage transformer, a second current transformer, a second emergency stop button, a second PLC module, and a second display screen. The high-voltage body cavity 23 on the right is equipped with a third knife-type disconnector, a third main control transformer, a third voltage transformer, a third current transformer, a third emergency stop button, a third PLC module, and a third display screen. Each high-voltage body cavity 23 is also equipped with a corresponding PLC module, which can meet various protection functions underground and ensure rapid switching of the line. The current transformer and voltage transformer are responsible for monitoring the high voltage and large current of the line.

[0029] A limit switch is installed between the main body cavity 4 and its door cover, which controls the upper level from supplying power when the cover is open by combining mechanical locking and electrical locking. The principle is: when the door cover is closed, the normally open point inside the limit switch becomes a normally closed point, and the internal power is energized. When the door cover is opened, the limit switch jumps, the normally closed point inside becomes a normally open point, and the power inside the chamber is cut off to meet the requirement of power-off when the cover is opened.

[0030] The isolating handle and emergency stop button locking mechanism 8 is used to realize the mechanical locking between the knife-type isolating switch and the emergency stop button, including the emergency stop button copper sleeve 9, the emergency stop button head, the emergency stop button shaft 11, the emergency stop button fixing pin 12, the universal coupling, the emergency stop spring 17, the isolating handle 18 and the isolating locking disk 21. The emergency stop button copper sleeve 9 is sleeved on the emergency stop button shaft 11, and the emergency stop button head and the emergency stop button shaft 11 are fixedly connected by the emergency stop button fixing pin 12. An emergency stop spring 17 is arranged between the emergency stop button copper sleeve 9 and the emergency stop button head. One end of the isolating handle 18 is fixedly connected to the universal shaft 14 of section II of the universal coupling, and the universal shaft 13 of section I of the universal coupling is fixedly connected to the operating rod of the knife-type isolating switch 3. The isolation handle 18 includes an isolation shaft 15, an isolation copper sleeve 16 and an isolation handle head 19. The isolation copper sleeve 16 is sleeved on the isolation shaft 15. One end of the isolation shaft 15 is fixedly connected to the II section universal shaft 14 of the universal coupling, and the other end of the isolation shaft 15 is connected to the isolation handle head 19 and fixed by a screw 20; the isolation locking disk 21 has two notches, and the emergency stop button 10 is located in a notch when not pressed. The isolation shaft 15 is fixedly connected to the isolation locking disk 21. When the emergency stop button 10 is pressed, the emergency stop button 10 disengages from the notch. At this time, the isolation handle 18 can be rotated, and then the knife switch type disconnector 3 is rotated to position 0 to cut off the power, and the emergency stop button 10 remains in the pressed position; when the knife switch type disconnector 3 is rotated to position 1, the emergency stop button 10 can pop out from the other notch, and the other line is energized.

[0031] This utility model is different from the original separate isolation conversion box. It can control three motor lines at the same time. Each motor adopts a one-in-one and one-backup line design. When there is a problem with the output line of the upper circuit of one of the motors, it can quickly switch to another line. It adopts a six-input and three-output design scheme, a PLC protection device, and a high-definition LCD display to display the operating parameters and body parameters of the upper starter or inverter equipment.

[0032] The utility model provides a locking mechanism between the emergency stop button and the isolation handle 18 of the knife-type isolating switch to realize a mechanical locking relationship. When the isolation handle 18 is rotated to cut off the power, the emergency stop button must be pressed. The upper starter or inverter must be powered off first, and then the opening operation can be performed to avoid the knife-type isolating switch from cutting off the power to the front door under load.

[0033] This utility model adopts a distributed design scheme, with two knife-type isolating switches placed on the left side of the main body and one knife-type isolating switch placed on the right side of the main body. This greatly reduces the risk of a failure in a piece of equipment or an outgoing line affecting the operation of the coal mining face motor and causing production to stop. Existing mines do not use this type of fast switching device. When an outgoing line fails, production must be stopped for line switching or equipment repair before operation can begin.

[0034] In the embodiment of the present invention, a combination of six incoming lines and three outgoing lines and three knife-type disconnectors is adopted, wherein the three knife-type disconnectors adopt 800A / 3300V level, which not only meets the safety standards but also leaves enough surplus capacity. Moreover, communication and control are carried out between the upper and lower levels through the through-wall terminal 22, and the control, current, voltage detection and display inside the high-voltage body cavity 23 are all controlled by the PLC module, which truly achieves the purpose of high reliability and high maintainability.

[0035] The door cover provided by the present invention adopts a screw door structure with better explosion-proof performance. Compared with the ordinary translation-type quick-opening door structure, the screw door does not require a complicated locking device to open the door. A travel switch lock is installed between the door cover and the main body cavity 4. When the front door 1 is opened, the travel switch pops up to prevent the upper switch from supplying power. When the door is closed, the travel switch falls and the upper switch supplies power.

[0036] The top of the cabinet of the utility model is also provided with a lifting ring, which is convenient for carrying and hanging the cabinet.

[0037] Regarding the specific structure of the present invention, it should be noted that the connection relationship between the various component modules adopted in the present invention is definite and feasible. Except for the special instructions in the embodiments, the specific connection relationship can bring about corresponding technical effects and solve the technical problems raised by the present invention without relying on the execution of the corresponding software program. The components, modules, models of specific components appearing in the present invention, the connection methods between each other, and the conventional usage methods and expected technical effects brought about by the above-mentioned technical features, except for the specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technology and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete, and feasible, and the corresponding physical products can be reproduced or obtained based on this technical means.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mine-used rapid switching isolation conversion device, comprising a cabinet, characterized in that: The cabinet body is provided with a door cover on the front, a display and an observation window are installed on the door cover, a body cavity is provided inside the cabinet body, an electrical lock is provided between the door cover and the body cavity, the body cavity includes at least one high-voltage body cavity and a secondary outlet cavity, a knife-type disconnector, a display screen and a primary protection device of a primary circuit are installed in the high-voltage body cavity, and the secondary outlet cavity is used to pass the signal transmission lines of the display and the primary protection device out of the cabinet body and connect them to the upper starter or inverter and the lower motor; An isolation handle, an emergency stop button locking mechanism, and an inlet and outlet quick plug are provided on one side panel of the cabinet. The inlet and outlet quick plug is used to connect the power supply of the upper-level main and standby equipment of a line to the high-voltage body cavity, and connect the power supply to the lower-level equipment; The isolation handle and emergency stop button locking mechanism includes an emergency stop button, an isolation handle and an isolation locking disk installed on a side panel of the cabinet. The isolation handle is connected to the operating rod of the knife-type isolation switch through a universal coupling. Two notches are provided on the isolation locking disk. The emergency stop button is located in one notch when not pressed. The isolation handle is fixedly connected to the isolation locking disk.

2. A mine-used rapid switching isolation conversion device according to claim 1, characterized in that: The emergency stop button includes an emergency stop button copper sleeve, an emergency stop button head, an emergency stop button shaft, an emergency stop button fixing pin and an emergency stop spring. The emergency stop button copper sleeve is mounted on the emergency stop button shaft, and the emergency stop button head and the emergency stop button shaft are fixedly connected by the emergency stop button fixing pin. The emergency stop spring is installed between the emergency stop button head and the emergency stop button copper sleeve. The isolation handle includes an isolation shaft, an isolation copper sleeve and an isolation handle head. The isolation copper sleeve is mounted on the isolation shaft. One end of the isolation shaft is connected to the isolation handle head. The other end of the isolation shaft is connected to a universal coupling. The isolation shaft is fixedly connected to the isolation locking disk.

3. A mine-used rapid switching isolation conversion device according to claim 1, characterized in that: A door cover is also provided on the back of the cabinet body. The door cover is connected to the cabinet body through a rotating shaft, and the lower end of the door cover is clamped with the cabinet body through a flange.

4. A mine-used rapid switching isolation conversion device according to claim 3, characterized in that: The door cover is two screw doors that are arranged on the left and right and can be opened and closed.

5. A mine-used rapid switching isolation conversion device according to any one of claims 1 to 4, characterized in that: A travel switch is arranged between the door cover and the body cavity.

6. A mine-used rapid switching isolation conversion device according to claim 5, characterized in that: The primary protection equipment includes a main control transformer, a voltage transformer, a current transformer, an emergency stop button, a PLC module and a display screen.

7. The mine-used rapid switching isolation conversion device according to claim 1, characterized in that: An explosion-proof partition is provided in the secondary outlet cavity, and a through-wall terminal is provided on the explosion-proof partition. The signal transmission lines of the display and the primary protection device pass through the through-wall terminal and then pass out from the secondary outlet horn mouth provided on one side panel of the cabinet.

8. The mine-used rapid switching isolation conversion device according to claim 1, characterized in that: There are three high-voltage body cavities, which can be connected to a main circuit and a backup circuit of three motors respectively.

9. The mine-used rapid switching isolation conversion device according to claim 1, characterized in that: The knife-type disconnector is an 800A / 3300V disconnector.

10. The mine-used rapid switching isolation conversion device according to claim 3, characterized in that: A waterproof groove is provided on the flange, and a rubber strip is installed in the waterproof groove.

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