A numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining

Abstract

The present invention relates to a numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining, comprising an explosion-proof housing and an operating device for opening and closing the connection between the switch body and the main circuit terminal group, wherein the explosion-proof housing comprises a front plate, a rear plate and a side plate, and an explosion-proof partition is arranged between the front plate and the rear plate, and the explosion-proof partition divides the explosion-proof housing into a main chamber and a wiring chamber, and the main chamber is divided into a plurality of small chambers by a transverse partition plate and a longitudinal partition plate, and a switch body is arranged in each small chamber, and a main circuit terminal group is arranged at a position corresponding to the switch body on the explosion-proof partition plate. By adopting the above technical scheme, the multi-circuit feeder switch is modularized and combined, and its line connection is completed in the same wiring chamber, which is simple to assemble, convenient to overhaul, and cost-saving. At the same time, the length of the original same circuit is reduced by at least half, the overall volume is reduced, and the installation cost is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of feeder switches, and in particular relates to a numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining. Background Art

[0002] Flameproof feeder switches are widely used in coal mines and other environments with explosive gases (methane mixtures) in surrounding media. They are used as main distribution switches or branch switches in three-phase neutral ungrounded power grids with AC 50Hz, voltage 660V, 1140V, 3300V and current up to 2000A and below. However, due to the complex working environment, damp ground, frequent startup of electrical equipment, or when the circuit breaker in the feeder switch is disconnected, vacuum tube contacts are stuck, broken down, etc., it is often necessary to maintain or repair it. The feeder switches currently used all use the method of opening the door to cut off the power, or manually disconnect the door without opening the door. However, it is difficult to determine whether the modular feeder switch is completely separated from the main circuit in the flameproof main cavity. Therefore, if the staff uses the method of opening the door to cut off the power or the modular feeder switch is not completely separated from the main circuit and the door is opened for maintenance and troubleshooting, it will bring major safety hazards to coal mine production safety and personal safety.

[0003] An existing modular feeder switch, for example, a flameproof and intrinsically safe modular feeder switch with patent number CN201520463497.0 disclosed by the applicant on April 6, 2016, comprises a switch body I, wherein the switch body I is composed of a modular feeder switch and a flameproof shell I, wherein the flameproof shell I has a main chamber I and a wiring chamber I, wherein the modular feeder switch is placed in the main chamber I, wherein the main chamber I is composed of a main chamber shell I, a front door I and a rear door, wherein a wiring chamber I is arranged above the main chamber I, wherein the main circuit inlet and outlet terminals and control and communication circuit wiring terminals of all main circuits are concentrated in the wiring chamber I, wherein the wiring chamber I is composed of a wiring chamber shell I, a docking flange located on the right side of the wiring chamber I, a main circuit inlet bell mouth located on the left side of the wiring chamber I, a control and communication circuit inlet and outlet bell mouth located on the front side of the wiring chamber I, a main circuit outlet bell mouth located on the rear side of the wiring chamber I, and an end cover located on the top of the wiring chamber I. While achieving the purpose of small size and light weight, it also has the advantages of convenient transportation and maintenance, and quick assembly or disassembly.

[0004] However, first, although the explosion-proof and intrinsically safe modular feeder switch (II model) can be set in the form of two modular feeder switches installed in the main chamber, the two-circuit feeder switches are formed into a whole, modularized, and convenient for the combination of multi-circuit feeder switches, but the combined feeder switch formed by this technical solution occupies a large area and space, and the cost of developing each unit of space in the mine is very high. How to reduce the volume of the multi-circuit feeder switch has become a new improvement direction, especially the more combined circuits, the greater the difficulty; second, the technical solution adopts a spring needle moving terminal seat in combination with a static terminal seat. Due to the humid environment, the spring needle moving terminal seat is prone to rust, resulting in poor contact, virtual connection, affecting the conductive performance, and short life; third, the explosion-proof The modular feeder switch with intrinsic safety adopts a crank, a withdrawal rod, a bottom bracket and a slideway to realize a push-pull sliding connection between the modular feeder switch and the main cavity. Although it avoids manual plugging and unplugging by the staff, and protects the safety of the staff to a certain extent, the sliding connection is not fully separated, and sparks may be generated during inspection or maintenance by the staff, which brings major safety hazards to coal mine production safety and personal safety; Fourth, the explosion-proof and intrinsically safe modular feeder switch only realizes the modularization of the magnetic starter and the single-circuit feeder switch, but its internal structure is still relatively complex. Once a problem occurs, professional technicians are required to come for maintenance or return to the factory for repair, which delays the work progress underground in the mine and causes huge production losses. Therefore, it is necessary to make further improvements. Summary of the invention

[0005] In summary, in order to overcome the deficiencies of the prior art, the present invention provides a numerically controlled explosion-proof and intrinsically safe modular feeder switch.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining, comprising an explosion-proof housing and an operating device, wherein the explosion-proof housing comprises a front plate, a rear plate and a side plate, and an explosion-proof partition is arranged between the front plate and the rear plate, and the explosion-proof partition divides the explosion-proof housing into a main chamber and a wiring chamber, and the main chamber is divided into a plurality of small chambers by a transverse partition plate and a longitudinal partition plate, and a switch body is arranged in each small chamber, and a main circuit terminal group is arranged at a position on the explosion-proof partition plate corresponding to the switch body, and the operating device is used to open and close the connection between the switch body and the main circuit terminal group.

[0007] By adopting the above technical scheme, the flameproof partition divides the flameproof housing into a main chamber and a wiring chamber, and the main chamber is divided into multiple small chambers by a transverse partition plate and a longitudinal partition plate. By assembling multiple switch bodies in different small chambers of the same main chamber, the wiring chamber is arranged behind the main chamber in this technical scheme, and the main chamber is divided into multiple small chambers by a transverse partition plate and a longitudinal partition plate. Compared with the prior art, the wiring chamber is located above the main chamber, and only one row of feeder switches can be connected. Once more modules are required, the volume of the entire combined feeder switch is very large, especially the length is too long, and the cost of developing per unit space in a mine is very high, resulting in high installation costs for multi-circuit combined feeder switches. The technical scheme arranges the module circuit breakers in at least two rows of upper and lower rows through a transverse partition plate, so that the length of the original same circuit is reduced by at least half, and the wiring chamber originally arranged on the top is changed to be arranged behind the main chamber, and the height of the two layers is similar to that of the original combined feeder switch, the overall volume is reduced, and the installation cost is greatly reduced.

[0008] The present invention is further provided with: a main cavity front door is provided on the other side of the small cavity opposite to the wiring cavity, an electric chassis vehicle is provided at the bottom of the main cavity for controlling the switch body to contact or stay away from the main circuit terminal group, the switch body is fixedly arranged on the electric chassis vehicle, the operating device is electrically connected to the switch body and the electric chassis vehicle respectively, a locking device is provided between the main cavity front door and the front panel, and the locking device is electrically connected to the operating device and the switch body respectively.

[0009] By adopting the above technical solution, the switch body includes a modular permanent magnet circuit breaker (hereinafter referred to as the modular circuit breaker) with patent number 201410377866.4 and a controller. Compared with the prior art that uses a combination of spiral rods, push-pull rods, etc. to realize the forward and backward movement of the modular circuit breaker, the technical solution fixes the modular circuit breaker on the electric chassis vehicle, and electrically connects the electric chassis vehicle through the operating device to control the electric chassis vehicle to drive the modular circuit breaker to move. The structure is simplified, the operation is convenient, and the electric drive is adopted, which saves time and effort. A lock is set between the front door of the main cavity and the front plate. The mechanism can avoid the risk of electrical accidents caused by manual withdrawal of the switch body in the working state. In the dusty and humid environment of the mine, the locking device is electrically connected to the switch body to realize the opening and closing of the switch body. Compared with the prior art that uses the cooperation of the spring needle moving terminal seat and the static terminal seat to realize the opening and closing of the switch body, it can avoid rusting of the spring needle moving terminal seat, resulting in poor contact, virtual connection, affecting the conductive performance and short life. The technical solution has no mechanical auxiliary contacts and adopts photoelectric detection. Compared with the mechanical auxiliary contacts, the life can be considered to be infinitely long.

[0010] The present invention is further provided that: the operating device includes a control mechanism arranged on the front door of the main cavity and a power box arranged on the inner wall of the side panel, the power box is electrically connected to the switch body, the control mechanism includes a button assembly and an industrial control screen for observing the conditions inside the small cavity, the industrial control screen is respectively electrically connected to the power box, the switch body and the button assembly, and the button assembly is respectively electrically connected to the conversion switch, the switch body and the electric chassis vehicle.

[0011] By adopting the above technical scheme, the present technical scheme includes a control mechanism, a power box, a switch body and a locking device. Each part is modularly arranged, and each part interacts through RS-485 communication. Compared with the complex mechanism in the prior art, the structure is clearer, the components are modularized, and it is easy to check and replace. The maintenance is simple, and there is no need for professional technicians to come for maintenance or return to the factory for repair, which will not delay the work progress underground and avoid huge production losses. At the same time, the industrial control screen on the front door of the main chamber is observed to display the opening and closing status of the switch body and whether the switch body is withdrawn in place (that is, whether the switch body is completely separated from the main circuit and enters a safe distance) and other states in the flameproof casing. By operating the button on the front door of the main chamber The component controls the opening and closing of the switch body in the main cavity, the state of the gate, and controls the electric chassis to drive the switch body to advance and withdraw (main circuit on and off). Compared with the existing technology, the main circuit is controlled by the moving spring needle seat, which requires the addition of a needle lifting mechanism with a complex structure. The push and pull rod is used to rotate the shaft to complete the advancement and withdrawal, which is time-consuming and labor-intensive. This technical solution only needs to operate the button component according to the content of the industrial control screen, which saves time and effort, is simple to operate, and is more accurate. At the same time, it is equipped with an isolated RS485 serial communication interface, which can upload parameters, events, fault information, etc. in real time, can be directly connected to the monitoring network, does not require a safety isolation device, and is convenient for networking and centralized control, realizing four remote functions such as telemetry, remote control, remote communication, and remote adjustment. Support MODBUS communication protocol, provide free communication protocol when users integrate automation networking, and actively cooperate with third parties to complete the implementation of the power monitoring system. Free open data interface to achieve remote control and remote adjustment.

[0012] The present invention is further provided that: the locking device includes an emergency stop tripping mechanism arranged on the front panel and a conversion switch arranged in the main cavity, the conversion switch is electrically connected to the switch body, the emergency stop tripping mechanism includes an opening and closing component for opening and closing the conversion switch and a positioning component for positioning the opening and closing component, a through hole is arranged on the front panel, the opening and closing component includes a mounting seat, a handle and a rotating shaft, the mounting seat is fixedly arranged at a position of the front panel corresponding to the conversion switch, the mounting seat is provided with a through hole adapted to the rotating shaft, the rotating shaft is provided with a groove for opening and closing the conversion switch at one end corresponding to the conversion switch, and the other end is connected to the handle through the through hole.

[0013] By adopting the above technical solution, it can be used in an emergency situation on site. If the circuit breaker is powered off, it will not automatically open. An emergency stop button is provided on the button group, which is connected to another set of capacitors of the CPS circuit breaker. The switch power supply is stepped down to the relay voltage of 24V or 12V. The conduction relay of the button is attracted, the contact is turned on, and the permanent magnet opening coil is connected to realize the emergency stop and opening of the circuit breaker in the fault state. A double-pole double-throw relay is set inside. The manual capacitor is turned on and the channel of the IGBT that controls the other set of capacitors is cut off at the same time to prevent the IGBT from breaking and causing a short circuit, which affects the input of the manual capacitor. Two sets of independent capacitors, without a common point, ensure the safe tripping of the circuit breaker opening; when the opening and closing component linkage conversion switch is powered off, the opening relay coil signal is connected, the permanent magnet coil is turned on for discharge, and all capacitors are discharged before opening the door; normal protection closing, opening and characteristic parameters are completed by another set of independent capacitors, which are automatically discharged after power failure. The function of one use and one standby of the main circuit breaker is realized. Enhanced stability and safety of use. Compared with existing technologies, it is simple to operate while retaining multiple safety protections.

[0014] The present invention is further provided that: the positioning assembly includes a fixing seat arranged above the handle and a positioning piece arranged above the fixing seat, the fixing seat is provided with a sliding channel for the positioning piece to slide up and down, the sliding channel is adapted to the positioning piece, the positioning piece is provided with a pull ring at the other end relative to the fixing seat, the handle is provided with a first positioning hole for positioning the power-on state and a second positioning hole for positioning the power-off state, the angle between the first positioning hole and the second positioning hole is equal to 180 degrees, and the first positioning hole and the second positioning hole are adapted to the positioning piece.

[0015] By adopting the above technical scheme, the pull ring is pulled to lift the positioning member up and away from the handle, and then the handle is turned to change the power state of the control circuit through the conversion switch. At this time, the handle is turned to align the first positioning hole with the positioning member, and then the pull ring is released, and the positioning member automatically falls with gravity to position the first positioning hole, and the handle is turned to align the second positioning hole with the positioning member, that is, the second positioning hole is positioned, and the positioning member prevents the rotary switch from rotating directly, thereby increasing stability and safety. The electric chassis vehicle is first driven to disconnect the switch body from the main circuit terminal group, and then the switch body control power supply is turned on and off through the opening and closing component, and then the opening and closing component is restricted by the positioning component. The three-line safety protection fully ensures that the modular feeder switch located in the flameproof shell can only open the main cavity door when it is completely separated from the main circuit, thereby avoiding the danger of electrical failure igniting mine methane, coal dust and other explosions due to insufficient electrical clearance of the circuit breaker in the modular feeder switch being separated from the main circuit. The scheme has reliable mechanical interlocking and electrical interlocking to provide safety protection for maintenance personnel.

[0016] The present invention further provides: the flameproof partition includes a plurality of small partitions adapted to the small cavity, the main circuit terminal group is arranged at the position of the small partition corresponding to the switch body, the small partition is provided with a fixing hole adapted to the main circuit terminal group at the position corresponding to the main circuit terminal group, the main circuit terminal group is arranged in the fixing hole, the main circuit terminal group includes 6 terminals, the terminals include a conductor and an insulating sleeve, the outer wall of the insulating sleeve is provided with a fixing part for fixing with the small partition, the conductor is embedded in the insulating sleeve, the end of the conductor relative to the switch body is provided with a plug hole, and the inner wall of the plug hole is provided with an elastic conductive member. An independent flameproof cavity is formed, and the fault repair of one circuit does not affect the normal operation of other circuits.

[0017] By adopting the above technical scheme, a terminal group with a main circuit is provided at one end in the fixing hole to cooperate with the switch body, and the purpose of closing and opening the switch body and the main circuit is achieved through the electric chassis vehicle, which solves the technical problem that the bolts are too strong to disconnect the main circuit power supply when opening the explosion-proof door in the prior art. Compared with the prior art, the structure is simpler and the operation is more convenient. The current carrying capacity problem of the cooperation between the vacuum tube and the static contact is solved in the design of the contact. The contact performance and stability of the conductor are improved by embedding the conductor in the insulating sleeve and fixing it through the fixing part on the insulating sleeve and the small partition.

[0018] The present invention is further provided that: the 6 terminals include 3 power terminals and 3 load terminals, the power terminals and the load terminals are arranged on two sides, the power terminals and the load terminals are arranged alternately, the conductor includes a first conductor arranged on the power terminals, the first conductor is arranged in a cylindrical shape corresponding to one end of the socket, and the first conductor is arranged in a flat plate shape relative to the other end of the socket.

[0019] By adopting the above technical scheme, the three input and three output six terminals of the electrical equipment corresponding to each small cavity are connected in convex and concave manner with finger-touch low-voltage explosion-proof terminal blocks, which saves twelve bolts and six cables, reduces the DC resistance of the connection point, improves the load capacity of the electrical equipment, increases the safety factor and reduces the material cost and space, and is suitable for use with modular and digital electrical equipment. The power terminal adopts a finger-touch low-voltage explosion-proof terminal with patent number CN201711346803.2. The jack end is cylindrical, which is convenient for cooperating with the switch body to achieve the purpose of closing and opening the switch body and the main circuit. The other end is flat, which is convenient for connection through conductive strips such as copper busbars.

[0020] The present invention further provides that: the conductor also includes a second conductor arranged on the load terminal, the second conductor is arranged in a cylindrical shape, the other end of the second conductor relative to the switch body is provided with a quick-connect socket for connecting with a copper nose, the outer periphery of the second conductor is provided with an annular groove, and the insulating sleeve is provided with an annular rib embedded in the annular groove.

[0021] By adopting the above technical solution, multiple groups of main circuit terminal groups are connected in parallel. When a branch corresponding to a single group of main circuit terminal groups has leakage, the branch switch will trip, and other branch switches will not trip to achieve selective leakage protection function; at the same time, during maintenance, the corresponding switch body can be separated from the relevant main circuit terminal group through the operating device to close the feeder switch of the branch, which is convenient for maintenance; and it does not affect the feeder switches of other branches to continue working, avoiding delays in underground work and causing production losses in the mine; and the feeder switches corresponding to the main circuit terminal groups that are not used temporarily can be closed without affecting other branches, saving resources Source; at the same time, the second conductor is arranged in a cylindrical shape, and a quick-connect socket is arranged at the other end, which is quickly connected to the copper nose by a bolt. The copper nose is used to quickly connect with the cable (the cable is commonly used in the mine to connect other equipment with the feeder switch). Compared with the prior art, the second conductor on the load side of the main circuit terminal group adopts a finger-type low-voltage explosion-proof terminal with patent number CN201711346803.2. The technical solution is faster and more convenient to connect with the cable, with low cost and high efficiency, and the interval between the first conductor and the second conductor is enlarged to ensure personal safety, and the intelligent protection and measurement and control units of the main and branch feeder switches are interchangeable.

[0022] The present invention is further arranged that: the main circuit terminal groups are respectively arranged in the upper and lower rows of the explosion-proof partition, and the first conductors at the same horizontal height are connected to one end of the wiring cavity corresponding to the first conductive belt, the conductive belt includes a first conductive belt, a second conductive belt and a third conductive belt in the horizontal direction and a fourth conductive belt, a fifth conductive belt and a sixth conductive belt in the longitudinal direction. The first conductive belt in the upper row is connected to the first conductive belt in the lower row through the fourth conductive belt, the second conductive belt in the upper row is connected to the second conductive belt in the lower row through the fifth conductive belt, and the third conductive belt in the upper row is connected to the third conductive belt in the lower row through the sixth conductive belt.

[0023] By adopting the above technical solution, the upper and lower three horizontal and three vertical connection methods are adopted, and the first conductor on the power supply side between the main circuit terminal groups is connected through a conductive tape (copper busbar and other conductive materials), which has simple connection, high efficiency, simple structure and convenient maintenance.

[0024] The present invention is further provided with: the explosion-proof partition is also provided with a control and communication circuit terminal group and an auxiliary line terminal group, the side panel includes a left panel and a right panel, the left panel is provided with a main circuit incoming line bell mouth and an intrinsically safe junction box at a position corresponding to the wiring chamber, and the right panel is provided with a main circuit outgoing line bell mouth and an auxiliary line outlet at a position corresponding to the wiring chamber.

[0025] By adopting the above technical scheme, connecting wires of the main circuit terminal group, the control and communication circuit terminal group and the auxiliary line terminal group are placed in the wiring cavity, so that there is no need to wire in the main cavity, and maintenance is very convenient; the main circuit outlet bell mouth and the auxiliary line outlet are provided at the position of the right side plate corresponding to the wiring cavity, and the main circuit input bell mouth and the intrinsically safe junction box (for connecting the control and communication circuit input and output lines) are provided at the position of the left side plate corresponding to the wiring cavity, which meets the needs of various input and output lines; at the same time, compared with the existing technology that has lines on the left and right sides, in the present technical scheme, all lines enter from the left and exit from the right, which is clear and concise, and is easy to install and maintain; when it is necessary to dock the switch combination, the main circuit input bell mouth on the left side of the wiring cavity shell can be replaced with a docking flange, and the building block-like combination can be realized through the docking flange between the switches.

[0026] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of Embodiment 1 of the present invention;

[0028] Figure 2 It is a rear view of the first embodiment of the present invention;

[0029] Figure 3 It is a side view of a local structure of the first embodiment of the present invention;

[0030] Figure 4 It is a top view of the local structure of the first embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of an 8-loop feeding combination according to Embodiment 1 of the present invention;

[0032] Figure 6 It is a rear view of a partial structure of the first embodiment of the present invention;

[0033] Figure 7 is a structural diagram of a load terminal according to a first embodiment of the present invention;

[0034] Figure 8 is a cross-sectional view of a load terminal according to the first embodiment of the present invention;

[0035] Fig. 9 It is a front view of a partial structure of a power-on state of a first embodiment of the present invention;

[0036] Fig.10 is a cross-sectional view of a locking device according to Embodiment 1 of the present invention;

[0037] Fig.11 This is a structural diagram of Embodiment 2 of the present invention;

[0038] Fig.12 This is a schematic diagram of a 6-loop feeding combination according to a second embodiment of the present invention;

[0039] Fig.13 is a circuit block diagram of an embodiment of the present invention;

[0040] Fig.14 The circuit diagram of the reduction motor according to the embodiment of the present invention;

[0041] Fig.15 The DC motor principle of the embodiment of the present invention Figure 1 ;

[0042] Fig.16 The DC motor principle of the embodiment of the present invention Figure 2 ;

[0043] Figure numerals: 1. Flameproof enclosure, 11. Front plate, 12. Rear plate, 13. Side plate, 131. Left side plate, 132. Right side plate, 14. Flameproof partition, 141. Small partition, 1411. Fixing hole, 15. Main cavity, 151. Small cavity, 16. Wiring cavity, 17. Horizontal partition, 18. Longitudinal partition, 2. Operating device, 21. Control mechanism, 211. Button assembly, 212. Industrial control panel, 22. Power supply box, 3. Switch body, 4. Main circuit terminal group, 41. Conductor, 411. Socket, 412. Elastic conductive member, 413. First conductor, 414. Second conductor, 4141. Quick-connect socket, 4142. Annular groove, 42. Insulating sleeve, 421. Fixing part, 43. Power terminal, 44. Load terminal, 5. Electric chassis vehicle, 6. Main cavity front door, 7. Locking device, 71. Emergency stop release mechanism, 711. Opening and closing assembly, 7111. Mounting seat, 7112. Handle, 71121. First positioning hole, 71122. Second positioning hole, 7113. Rotating shaft, 71131. Groove, 712. Positioning assembly, 7121. Fixed seat, 7122. Positioning piece, 71221. Pull ring, 72. Switch, 10. Conductive belt, 101. First conductive belt, 102. Second conductive belt, 103. Third conductive belt, 104. Fourth conductive belt, 105. Fifth conductive belt, 106. Sixth conductive belt, 110. Control and communication circuit terminal group, 120. Auxiliary line terminal group, 130. Main circuit incoming line bell mouth, 140. Intrinsically safe junction box, 150. Main circuit outgoing line bell mouth, 160. Auxiliary line outlet. DETAILED DESCRIPTION

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0045] See attached Figure 1-13 The embodiment discloses a numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining, comprising an explosion-proof housing 1 and an operating device 2, wherein the explosion-proof housing 1 comprises a front plate 11, a rear plate 12 and a side plate 13, wherein an explosion-proof partition 14 is arranged between the front plate 11 and the rear plate 12, wherein the explosion-proof partition 14 divides the explosion-proof housing 1 into a main chamber 15 and a wiring chamber 16, wherein the main chamber 15 is divided into a plurality of small chambers 151 by a transverse partition plate 17 and a longitudinal partition plate 18, wherein a switch body 3 is arranged in each small chamber 151, wherein a main circuit terminal group 4 is arranged at a position corresponding to the switch body on the explosion-proof partition plate 14, and wherein the operating device 2 is used for switching on and off the connection between the switch body and the main circuit terminal group.

[0046] The present embodiment is further configured as follows: a main cavity front door 6 is provided on the other side of the small cavity 151 opposite to the wiring cavity 16; an electric chassis vehicle 5 for controlling the switch body 3 to contact or stay away from the main circuit terminal group 4 is provided at the bottom of the main cavity 15; the switch body 3 is fixedly arranged on the electric chassis vehicle 5; the operating device 2 is electrically connected to the switch body 3 and the electric chassis vehicle 5 respectively; a locking device 7 is provided between the main cavity front door 6 and the front panel 11; the locking device 7 is electrically connected to the switch body 3.

[0047] In the technical solution of the present invention, the switch housing adopts a flameproof quick-opening door structure, and has electric and manual capacitor energy storage disconnection functions. It has the function of isolating the CPS circuit breaker (German technology) from the main circuit and plugging it in. If one circuit fails, the maintenance will not affect the normal operation of other circuits. An electric (manual) dual-use chassis vehicle is set up to push the CPS module forward and backward, and the limit sensor is transmitted to the ground monitoring and control through RS-485, and the words "in place" and "out of place" are clearly displayed respectively. The words "out of place" are uploaded during the process of the vehicle entering and retreating. The purpose of mine safety production and continuous power supply is achieved. In addition, the electric vehicle is locked to exit in the closed state, and the closing is locked when the vehicle is not in place, effectively protecting the moving contact of the CPS circuit breaker and the static contact of the main circuit from damage. The automation of the feed switch is realized by numerical control technology. At the same time, a flat or hexagonal shaft is provided at the rear of the electric chassis vehicle, which is matched with a screwdriver and a socket. When the electric chassis vehicle fails, the chassis vehicle can be manually exited. At the same time, CNC programming is used to realize the coordination between the closing and opening states of the switch and the electric chassis vehicle, effectively protecting the quick-insertion moving and static contacts.

[0048] This embodiment is further configured as follows: the operating device 2 includes a control mechanism 21 arranged on the front door 6 of the main cavity and a power box 22 arranged on the inner wall of the side panel 13; the control mechanism 21 and the switch body 3 are electrically connected to the power box 22 respectively; the control mechanism 21 includes a button assembly 211 and an industrial control screen 212 for observing the conditions in the main cavity 151; the industrial control screen 212 is electrically connected to the power box 22, the switch body 3 and the button assembly 211 respectively; the button assembly 211 is electrically connected to the switch body 3 and the electric chassis vehicle 5 respectively.

[0049] In the technical solution of the present invention, first, the power box provides input power from the shift output voltage, and outputs AC220V, DC24V, etc. to provide power to the industrial control panel, CPS circuit breaker, and electric chassis. Second, the CPS circuit breaker integrates the circuit breaker and the control, and the closing and opening status is transmitted to the industrial control panel by RS485. It has built-in double sets of independent capacitors, three-phase current transformers, reactors, etc. to realize the one-in-one function. It is controlled by the button assembly and the industrial control panel. Third, the button assembly presses the car entry key, the switch sits on the electric chassis vehicle (screw bottom vehicle) to enter the vehicle, reaches the limit switch 2 position, the limit switch is turned on, and the RS485 industrial control screen displays the word "in place", and the CPS circuit breaker is allowed to close. If the industrial control screen does not receive the "in place" signal, the circuit breaker is refused to close. Prevent the CPS circuit breaker from burning the joint surface when the moving contact of the CPS circuit breaker is virtual connected with the static contact of the main circuit. For example, the electric chassis vehicle (screw bottom vehicle) is refused to be withdrawn in the closed state to prevent plugging and unplugging with load when the switch is closed, which will burn the moving contact of the CPS circuit breaker and the static contact of the main circuit. Fourth, the button assembly presses the withdrawal button, and the CPS circuit breaker can only withdraw the electric chassis vehicle when the switch is open. When it reaches the limit switch 1 position, the switch is turned on, and the industrial control screen displays the word "exit" through RS485. The word "out of position" is displayed in the middle of entering and exiting. The isolation switch function is formed between the two limit positions of the electric chassis vehicle.

[0050] This embodiment further provides: the locking device 7 includes an emergency stop tripping mechanism 71 arranged on the front plate 11 and a conversion switch 72 arranged in the main cavity 15, the conversion switch 72 is electrically connected to the switch body 3, the emergency stop tripping mechanism 71 includes an opening and closing component 711 for opening and closing the conversion switch 72 and a positioning component 712 for positioning the opening and closing component 711, the front plate 11 is provided with a through hole, the opening and closing component 711 includes a mounting seat 7111, a handle 7112 and a rotating shaft 7113, the mounting seat 7111 is fixedly arranged at a position of the front plate 11 corresponding to the conversion switch 72, the mounting seat 7111 is provided with a through hole adapted to the rotating shaft 7113, the rotating shaft 7113 is provided with a groove 71131 for opening and closing the conversion switch 72 at one end corresponding to the conversion switch 72, and the other end passes through the through hole and is connected to the handle 7112.

[0051] This embodiment is further configured as follows: the positioning assembly 712 includes a fixing seat 7121 arranged above the handle 7112 and a positioning piece 7122 arranged above the fixing seat 7121, the fixing seat 7121 is provided with a sliding channel for the positioning piece 7122 to slide up and down, the sliding channel is adapted to the positioning piece 7122, the positioning piece 7122 is provided with a pull ring 71221 at the other end relative to the fixing seat 7121, the handle 7112 is provided with a first positioning hole 71121 for positioning the power-on state and a second positioning hole 71122 for positioning the power-off state, the angle between the first positioning hole 71121 and the second positioning hole 71122 is equal to 180 degrees, and the first positioning hole 71121 and the second positioning hole 71122 are adapted to the positioning piece 7122.

[0052] This embodiment further provides: the flameproof partition 14 includes a plurality of small partitions 141 adapted to the small cavity 151, the main circuit terminal group 4 is arranged at the position of the small partition 141 corresponding to the switch body 3, the small partition 141 is provided with a fixing hole 1411 adapted to the main circuit terminal group 4 at the position corresponding to the main circuit terminal group 4, the main circuit terminal group 4 is arranged in the fixing hole 1411, the main circuit terminal group 4 includes 6 terminals, the terminals include a conductor 41 and an insulating sleeve 42, the outer wall of the insulating sleeve 42 is provided with a fixing portion 421 for fixing to the small partition 141, the conductor 41 is embedded in the insulating sleeve 42, the end of the conductor 41 opposite to the switch body 3 is provided with a socket 411, and the inner wall of the socket 411 is provided with an elastic conductive member 412.

[0053] This embodiment is further configured as follows: the six terminals include three power terminals 43 and three load terminals 44, the power terminals and the load terminals 44 are arranged on two sides, the power terminals 43 and the load terminals 44 are arranged alternately, the conductor 41 includes a first conductor 413 arranged on the power terminals 43, the first conductor 413 is arranged in a cylindrical shape at one end corresponding to the socket 411, and the other end of the first conductor 413 is arranged in a flat plate shape relative to the socket 411.

[0054] This embodiment further configures: the conductor 41 also includes a second conductor 414 arranged on the load terminal 44, the second conductor 414 is arranged in a cylindrical shape, and the other end of the second conductor 414 relative to the switch body 3 is provided with a quick-connect socket 4141 for connecting with a copper nose, the outer periphery of the second conductor 414 is provided with an annular groove 4142, and the insulating sleeve 42 is provided with an annular rib embedded in the annular groove 4142.

[0055] This embodiment is further configured as follows: the main circuit terminal groups 4 are respectively arranged in the upper and lower rows of the flameproof partition 14; the first conductors 413 at the same horizontal height are connected to one end of the wiring cavity 16 corresponding to the first conductive belt 10; the conductive belt 10 includes a first conductive belt 101, a second conductive belt 102 and a third conductive belt 103 in the horizontal direction and a fourth conductive belt 104, a fifth conductive belt 105 and a sixth conductive belt 106 in the longitudinal direction; the first conductive belt 101 in the upper row is connected to the first conductive belt 101 in the lower row through the fourth conductive belt 104; the second conductive belt 102 in the upper row is connected to the second conductive belt 102 in the lower row through the fifth conductive belt 105; the third conductive belt 103 in the upper row is connected to the third conductive belt 103 in the lower row through the sixth conductive belt 106.

[0056] This embodiment is further configured as follows: the small partition 141 is also provided with a control and communication circuit terminal group 110 and an auxiliary line terminal group 120, the side panel 13 includes a left side panel 131 and a right side panel 132, the left side panel 131 is provided with a main circuit incoming line bell mouth 130 and an intrinsically safe junction box 140, and the right side panel 132 is provided with a main circuit outgoing line bell mouth 150 and an auxiliary line outlet 160.

[0057] In the technical solution of the present invention, the feed switch has an additional DC leakage detection unit and a zero-sequence voltage, zero-sequence current and power direction detection unit. The main feed switch and the sub-feed switch can automatically form a perfect two-stage selective leakage protection system, which can automatically adapt to cable lines of different lengths.

[0058] The above-mentioned "between" does not only refer to directions and positions, but also refers to the interaction between different parts. The above-mentioned left and right are relative to the main cavity front door of the feed switch as the main viewing direction.

[0059] In the technical solution of the present invention, the working principle of the electric vehicle is described. The electric vehicle is a device that controls the forward and backward movement of the CPS circuit breaker, realizes the closure of the contact surface between the circuit breaker moving contact and the main circuit static contact, and ensures that the electric vehicle cannot retreat when the switch is closed. When the switch is closed, it is equivalent to having a load. At this time, retreating the vehicle will cause arcing and burn the contact surface between the circuit breaker moving contact and the main circuit static contact. If it is not in place, if it is a virtual connection and load is added, the contact surface will also be burned.

[0060] Its working principle: the electric car is controlled by a control board. The input power is AC220V, which is converted to DC24V by the AC / DC module to power the entire circuit, and then converted to 5V DC power by the DC / DC power module JP2 to power the CPU and the optocoupler. At the same time, the DC / DC module C2 of B0505S is used to convert it into an isolated 5V power supply to power the communication circuit. The electric car control circuit consists of input, output, communication, and control circuits. The input signal is collected by the optocoupler U3, including the forward button, the reverse button, the front limit, and the rear limit. The input signal is input to the CPU through the optocoupler to control the car to move forward or backward. The output circuit consists of two relays and a motor, in which LDJ1 controls the motor steering by changing the direction of the DC power output to realize the car moving forward or backward, and the relay K1 controls the motor to start and stop. The communication circuit consists of the ADN2483 isolated RS485 transceiver and peripheral circuits. The communication circuit is connected to the host computer, which can monitor the status of the electric car in real time, and can also send forward or backward instructions to control the car's movement. The control circuit is composed of a CPU, which controls the car to move forward and backward by receiving commands from input buttons or the host computer.

[0061] Workstation process: When the control panel is powered on, the CPU determines the position of the trolley and the input button status by detecting the input signal. When the forward button is pressed (sdqsr=0), the CPU will detect the position of the trolley at the same time. If the rear limit switch is connected (hxw=0) and the front limit switch is disconnected (qxw=1), it means that the circuit breaker and the contact are in a separated state, and the trolley can be controlled to move forward. The CPU first controls the release of relay LDJ1 to control the forward rotation of the motor, and then controls the relay K1 to attract and start the motor. At this time, the trolley will move forward driven by the motor. At this time, the rear limit switch will automatically disconnect. When the current limit switch is connected (qxw=0), it means that the trolley has moved forward to the position. The display screen shows the word "in place". At this time, the moving contact of the circuit breaker and the static contact of the main circuit have been in good contact. The CPU controls the release of relay K1 to disconnect the power supply of the motor, and the motor stops running. When the car back button is pressed (sdhsr=0), the CPU detects the position of the car. If the front limit switch is connected (qxw=0) and the rear limit switch is disconnected (hxw=1), it means that the circuit breaker and the contact are in the on state. At this time, it is necessary to detect whether the circuit breaker is in the closed state. The car can only be controlled to retreat in the open state. When it is detected that the action conditions are met, the CPU first controls the relay LDJ1 to attract and control the motor to reverse, and then controls the relay K1 to attract and start the motor. At this time, the car will retreat under the drive of the motor. At this time, the front limit switch will automatically disconnect (qxw=1). When the rear limit switch is connected (hxw=0), it means that the car has retreated to the position, and the display screen shows the word "exit". At this time, the circuit breaker moving contact and the main circuit contact surface contact have been completely disconnected. The CPU controls the relay K1 to release, disconnect the motor power supply, and the motor stops running. During the operation of the car, the RS485 "off-position" signal is uploaded. The communication circuit is connected to the host computer to upload the status of the car in real time. At the same time, the host computer can also send instructions through communication to control the car to move forward and backward. The control process is the same as manual control.

[0062] Although this article uses more flameproof enclosure 1, front plate 11, rear plate 12, side plate 13, left side plate 131, right side plate 132, flameproof partition 14, main chamber 15, wiring chamber 16, operating device 2, control mechanism 21, power box 22, button assembly 211, industrial control panel 212, switch body 3, main circuit terminal group 4, electric chassis vehicle 5, main chamber front door 6, locking device 7, emergency stop tripping mechanism 71, opening and closing assembly 711, mounting seat 7111, handle 7112, first positioning hole 71121, second positioning hole 71122, third positioning hole 7112 3, the rotating shaft 7113, the groove 71131, the positioning assembly 712, the fixing seat 7121, the positioning member 7122, the pull ring 71221, the switching switch 72, the conductive belt 10, the first conductive belt 101, the second conductive belt 102, the third conductive belt 103, the fourth conductive belt 104, the fifth conductive belt 105, the sixth conductive belt 106, the control and communication circuit terminal group 110, the auxiliary line terminal group 120, the main circuit incoming line bell mouth 130, the intrinsically safe junction box 140, the main circuit outgoing line bell mouth 150, etc., but the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining, characterized in that: The invention comprises a flameproof housing and an operating device, wherein the flameproof housing comprises a front plate, a rear plate and a side plate, a flameproof partition is arranged between the front plate and the rear plate, the flameproof partition divides the flameproof housing into a main chamber and a wiring chamber, the main chamber is divided into a plurality of small chambers by a transverse partition plate and a longitudinal partition plate, a switch body is arranged in each small chamber, a main circuit terminal group is arranged at a position corresponding to the switch body on the flameproof partition, the operating device is used to switch on and off the connection between the switch body and the main circuit terminal group; a main chamber front door is arranged on the other side of the small chamber relative to the wiring chamber, an electric chassis vehicle for controlling the switch body to contact or stay away from the main circuit terminal group is arranged at the bottom of the main chamber, the switch body is fixedly arranged on the electric chassis vehicle, the operating device is electrically connected to the switch body and the electric chassis vehicle respectively, a locking device is arranged between the main chamber front door and the front plate, the locking device is electrically connected to the operating device and the switch body respectively; the locking device comprises an emergency stop release arranged on the front plate A buckle mechanism and a conversion switch arranged in the main cavity, the conversion switch is electrically connected to the switch body, the emergency stop tripping mechanism includes an opening and closing component for opening and closing the conversion switch and a positioning component for positioning the opening and closing component, a through hole is arranged on the front plate, the opening and closing component includes a mounting seat, a handle and a rotating shaft, the mounting seat is fixedly arranged at a position of the front plate corresponding to the conversion switch, the mounting seat is provided with a through hole adapted to the rotating shaft, one end of the rotating shaft corresponding to the conversion switch is provided with a groove for opening and closing the conversion switch, and the other end passes through the through hole and is connected to the handle; the operating device includes a control mechanism arranged on the front door of the main cavity and a power box arranged on the inner wall of the side panel, the power box is electrically connected to the switch body, the control mechanism includes a button assembly and an industrial control screen for observing the status in the small cavity, the industrial control screen is electrically connected to the power box, the switch body and the button assembly respectively, and the button assembly is electrically connected to the conversion switch, the switch body and the electric chassis vehicle respectively.

2. According to claim 1, a numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining, characterized in that: The positioning assembly includes a fixing seat arranged above the handle and a positioning piece arranged above the fixing seat, the fixing seat is provided with a sliding channel for the positioning piece to slide up and down, the sliding channel is adapted to the positioning piece, and the positioning piece is provided with a pull ring at the other end relative to the fixing seat, the handle is provided with a first positioning hole for positioning the power-on state and a second positioning hole for positioning the power-off state, the angle between the first positioning hole and the second positioning hole is equal to 180 degrees, and the first positioning hole and the second positioning hole are adapted to the positioning piece.

3. According to claim 1, a numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining, characterized in that: The flameproof partition includes a plurality of small partitions adapted to the small cavity, the main circuit terminal group is arranged at the position of the small partition corresponding to the switch body, the small partition is provided with a fixing hole adapted to the main circuit terminal group at the position of the main circuit terminal group, the main circuit terminal group is arranged in the fixing hole, the main circuit terminal group includes 6 terminals, the terminals include a conductor and an insulating sleeve, the outer wall of the insulating sleeve is provided with a fixing portion for fixing to the small partition, the conductor is embedded in the insulating sleeve, the end of the conductor opposite to the switch body is provided with a socket, and the inner wall of the socket is provided with an elastic conductive member.

4. A numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining according to claim 3, characterized in that: The 6 terminals include 3 power terminals and 3 load terminals, the power terminals and the load terminals are arranged on both sides, the power terminals and the load terminals are arranged alternately, the conductor includes a first conductor arranged on the power terminal, the first conductor is arranged in a cylindrical shape corresponding to one end of the socket, and the first conductor is arranged in a flat plate shape relative to the other end of the socket.

5. A numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining according to claim 4, characterized in that: The conductor also includes a second conductor arranged on the load terminal, the second conductor is arranged in a cylindrical shape, and the other end of the second conductor relative to the switch body is provided with a quick-connect socket for connecting with a copper nose, an annular groove is provided on the outer periphery of the second conductor, and the insulating sleeve is provided with an annular rib embedded in the annular groove.

6. A numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining according to claim 5, characterized in that: The main circuit terminal groups are respectively arranged in the upper and lower rows of the explosion-proof partition, and the first conductors at the same horizontal height are connected to one end of the wiring cavity corresponding to the wiring cavity through a conductive belt. The conductive belt includes a first conductive belt, a second conductive belt and a third conductive belt in the horizontal direction and a fourth conductive belt, a fifth conductive belt and a sixth conductive belt in the longitudinal direction. The first conductive belt in the upper row is connected to the first conductive belt in the lower row through the fourth conductive belt, the second conductive belt in the upper row is connected to the second conductive belt in the lower row through the fifth conductive belt, and the third conductive belt in the upper row is connected to the third conductive belt in the lower row through the sixth conductive belt.

7. The numerically controlled explosion-proof and intrinsically safe vacuum combined feeder switch for mining according to claim 1 is characterized in that: The flameproof partition is also provided with a control and communication circuit terminal group and an auxiliary line terminal group. The side panel includes a left side panel and a right side panel. The left side panel is provided with a main circuit incoming line bell mouth and an intrinsically safe junction box at a position corresponding to the wiring chamber, and the right side panel is provided with a main circuit outgoing line bell mouth and an auxiliary line outlet at a position corresponding to the wiring chamber.

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