CN210575708U

CN210575708U - Numerical control explosion-proof and intrinsically safe vacuum feed switch

Info

Publication number: CN210575708U
Application number: CN201921636118.8U
Authority: CN
Inventors: 虞旭飞
Original assignee: Qiaorong Electronic Technology Co Ltd
Current assignee: Qiaorong Electronic Technology Co Ltd
Priority date: 2019-09-28
Filing date: 2019-09-28
Publication date: 2020-05-19
Anticipated expiration: 2029-09-28

Abstract

The utility model relates to a numerical control flame-proof and intrinsic safety type vacuum feed switch, which comprises a flame-proof shell and a front door of a main cavity, the flameproof housing comprises a front plate, a rear plate and side plates, a flameproof partition plate is arranged between the front plate and the rear plate, the explosion-proof partition plate divides the explosion-proof shell into a main cavity and a wiring cavity, a switch body is arranged in the main cavity, a main circuit terminal group is arranged on the explosion-proof partition plate corresponding to the switch body, an operating device for switching on and off the connection between the switch body and the main circuit terminal group is arranged on the front door of the main cavity, an electric chassis vehicle for controlling the switch body to contact or be far away from the main circuit terminal group is arranged at the bottom of the main cavity, the switch body is fixedly arranged on the electric chassis vehicle, and a locking device is arranged between the front door of the main cavity and the front plate. Through adopting above-mentioned technical scheme, provide the safety guarantee to maintenance personal, the structure is simplified, convenient operation adopts electronically, labour saving and time saving.

Description

Numerical control explosion-proof and intrinsically safe vacuum feed switch

Technical Field

The utility model belongs to the technical field of the feed switch, especially, relate to a numerical control flame proof and safe type vacuum feed switch of essence.

Background

The explosion-proof feed switch is widely applied to an environment containing explosive gas (methane mixture) in coal mine underground and other surrounding media, and is used as a main switch or a branch switch of power distribution in a neutral ungrounded three-phase power grid with 50Hz alternating current, 660V and 1140V voltage and multi-loop current of 2000A or below. However, due to the reasons of complex working environment, wet ground, frequent starting of electrical equipment and the like, or when a breaker in a feeder switch is opened, and faults such as adhesion and breakdown of vacuum tube contacts occur, the feeder switch is usually required to be maintained or overhauled, and the currently used feeder switch adopts a door-opening power-off mode or is manually opened without opening a door, but it is difficult to determine whether the modular feeder switch is in a state of completely separating from a main circuit in an explosion-proof main cavity, so that if an operator adopts the door-opening power-off mode or the modular feeder switch is not completely separated from the main circuit and then opens the door to overhaul and remove the faults, great potential safety hazards are brought to coal mine safety production and personal safety.

The existing modular feeder switch, for example, a flame-proof and intrinsically safe modular feeder switch with patent number CN201520465222.0, which is disclosed by the applicant in 2016, 1, 20, is provided with a flame-proof housing and a modular feeder switch arranged in an inner cavity of the flame-proof housing, wherein the flame-proof housing is provided with a front door of a main cavity, the modular feeder switch enters and exits the inner cavity of the flame-proof housing from the front door of the main cavity, the lower part of the inner side of the front door of the main cavity is provided with a locking mechanism, and the flame-proof housing is; the locking mechanism comprises a lock shell, a lock key and a lock tongue which are movably connected with the lock shell are arranged in the lock shell, the moving direction of the lock key is consistent with the moving direction of the modular feed switch in the inner cavity of the explosion-proof shell, the lock key is matched with the lock tongue, when the lock key moves in the lock shell, the lock tongue moves in the lock shell, and the front door of a main cavity can be opened; when the lock key moves outwards the lock shell, the lock tongue extends outwards the lock shell and acts on the locking groove to lock the front door of the main cavity and the explosion-proof shell. The danger that the modular feed switch is separated from the main circuit and the electric clearance is insufficient to cause electric faults to ignite explosions such as mine methane, coal dust and the like is avoided, and safety guarantee is provided for maintenance personnel.

However, according to the first technical scheme, the operation of opening and closing the front door of the main cavity is complex, the working efficiency is low, the internal structure is complex, many fault points are difficult to check, the maintenance is inconvenient, the replacement of components is complex, common personnel cannot maintain the front door, the front door needs to be maintained by professional technicians or returned to a factory for maintenance, the working process under the mine is delayed, and huge production loss is caused; secondly, the movable terminal seat of the spring needle is matched with the fixed terminal seat, and the movable terminal seat of the spring needle is easy to rust due to moist environment, so that poor contact is caused, virtual connection is generated, the conductivity is influenced, and the service life is short; thirdly, the modular feed switch is connected with the main cavity in a sliding mode through a crank, an exit rod, a bottom support and a slide way, the worker is prevented from manually inserting and pulling, the safety of the worker is protected to a certain degree, the situation in the main cavity cannot be confirmed through the technical scheme, the switch body cannot be guaranteed to be completely separated from the safe distance of the main circuit terminal group, the sliding connection still has the situation that the separation is not in place, the worker can generate sparking during inspection or maintenance, and great potential safety hazards are brought to coal mine safety production and personal safety. Therefore, there is a need for further improvement in safety protection while ensuring safety.

SUMMERY OF THE UTILITY MODEL

To sum up, for overcoming the not enough of prior art, the utility model provides a flame proof and safe type modular feeder switch of essence.

In order to achieve the above purpose, the utility model provides a following technical scheme: a numerical control flame-proof and intrinsic safety type vacuum feed switch comprises a flame-proof shell and a main cavity front door, wherein the flame-proof shell comprises a front plate, a rear plate and side plates, a flame-proof partition plate is arranged between the front plate and the rear plate and divides the flame-proof shell into a main cavity and a wiring cavity, a switch body is arranged in the main cavity, a main circuit terminal group is arranged on the position, corresponding to the switch body, of the flame-proof partition plate, an operating device for switching on and off the connection between the switch body and the main circuit terminal group is arranged on the main cavity front door, an electric chassis vehicle for controlling the switch body to contact with or be far away from the main circuit terminal group is arranged at the bottom of the main cavity, the switch body is fixedly arranged on the electric chassis vehicle, the operating device is respectively electrically connected with the switch body and the electric chassis vehicle, and a locking device is arranged between the main cavity front door and the front plate, the locking device is electrically connected with the operating device and the switch body respectively.

Through adopting above-mentioned technical scheme, place the switch body in the main cavity, the switch body includes that a patent number is 201410377866.4 modular permanent magnetism circuit breaker (hereinafter be referred to as module circuit breaker) and controller the main cavity qianmen with set up blocked mechanical system between the front bezel, avoid the switch body in the switch body under the operating condition, the artificial danger that withdraws from and cause the electric accident, under dust and humid environment in the mine, the floodgate that opens and shuts of realizing the switch body is connected with switch body electricity with blocking device, compare in prior art and adopt the cooperation of spring needle movable terminal seat and static terminal seat to realize the floodgate that opens and shuts of switch body, can avoid spring needle movable terminal seat to produce and rust, lead to contact failure, produce virtual company, influence electric conductivity nature, and the life-span is short, this technical scheme does not have mechanical auxiliary contact, adopt the photoelectric form to detect, compare with mechanical form auxiliary contact, The life can be regarded as infinite; compare in prior art and adopt combination cooperation such as hob, push-and-pull rod to realize module circuit breaker's antedisplacement and retreat, this technical scheme with module circuit breaker fixed the setting on electronic chassis car, through operating means with electronic chassis car electricity is connected, and control electronic chassis car drives module circuit breaker and removes, and the structure is simplified, and convenient operation adopts electronically, labour saving and time saving.

The utility model discloses further set up: the locking device comprises an emergency stop tripping mechanism arranged on the front plate and a change-over switch arranged in the main cavity, the change-over switch is electrically connected with the switch body, the emergency stop tripping mechanism comprises an opening and closing assembly used for opening and closing the change-over switch and a positioning assembly used for positioning the opening and closing assembly, a through hole is formed in the front plate, and one end, corresponding to the rear plate, of the opening and closing assembly penetrates through the through hole to be matched with the change-over switch.

By adopting the technical scheme, the emergency stop tripping mechanism adopts the independent capacitor for energy storage, and the switching switch is driven by the starting and stopping assembly to start and stop the independent capacitor for energy storage, so that the emergency stop tripping can be reliably realized within 24 hours; the double sets of independent capacitors have no public point, one set of independent capacitors is used for one standby, and the safety tripping of the breaker is ensured; when the on-off component is linked with the change-over switch, a signal of the opening relay is switched on, the permanent magnet coil is conducted to discharge, and all capacitors are discharged before the door is opened; normal protection is carried out on closing, opening and characteristic parameters by another set of independent capacitor, and automatic discharge is carried out after power failure; the opening and closing assembly is positioned through the positioning assembly, the opening and closing assembly is ensured not to be switched randomly in different states, the stability is enhanced, the use safety is enhanced, compared with the prior art, when multiple safety protection is kept, the emergency stop tripping is simplified into two steps, and the operation is simple.

The utility model discloses further set up: the opening and closing assembly comprises a mounting seat, a handle and a rotating shaft, the mounting seat is fixedly arranged on the position, corresponding to the change-over switch, of the front plate, a through hole matched with the rotating shaft is formed in the mounting seat, the rotating shaft corresponds to one end of the change-over switch, a groove used for opening and closing the change-over switch is formed in the end of the change-over switch, and the other end of the change-over switch penetrates through the through hole to be connected with the handle.

By adopting the technical scheme, the manual opening and closing switch is used in an on-site emergency state, if the breaker is not opened in power failure, the handle in front of the door is manually rotated, and the change-over switch in the small cavity is driven to be opened and closed through the rotating shaft, so that the condition that no power is supplied for manual opening and closing within 24 hours is ensured; the breaking capacity and speed are improved, the breaker can instantly realize the breaking capacity of 20KA, when the circuit loop needs to be cut off under the abnormal condition, the corresponding circuit loop can be conveniently and reliably cut off, and the breaker has a good using effect.

The utility model discloses further set up: be provided with the mounting bracket on the curb plate, the mounting bracket including be used for with the fixed plate that the curb plate is connected with be used for with the mounting panel that change over switch is connected, the mounting panel with the front bezel is parallel, the mounting panel is provided with the through-hole, change over switch set up in mounting panel rear end face, change over switch corresponds the one end of axis of rotation is provided with and is used for opening and close change over switch's turning block, the turning block passes the through-hole of mounting panel with the recess cooperatees.

Through adopting above-mentioned technical scheme, the mounting bracket is the L type, and the fixed plate is fixed with the curb plate, and change over switch fixes on the mounting panel, but fixed plate and mounting panel integrated into one piece compare with prior art, this mounting bracket simple to operate, simple structure, it is with low costs, change over switch's turning block sets up in the recess of axis of rotation, opens and close change over switch, easy operation through rotating the axis of rotation.

The utility model discloses further set up: the locating component comprises a fixing seat and a locating piece, wherein the fixing seat is arranged above the handle, the locating piece is arranged above the fixing seat, a sliding channel is arranged on the fixing seat and used for sliding the locating piece up and down, the sliding channel is matched with the locating piece, the locating piece is arranged relative to the other end of the fixing seat and provided with a pull ring, a first locating hole used for locating a power supply opening state and a second locating hole used for locating a power supply closing state are arranged on the handle, a included angle between the first locating hole and the second locating hole is equal to 180 degrees, and the first locating hole is matched with the second locating hole.

By adopting the technical scheme, the pull ring is pulled to lift the positioning piece to separate from the handle, then the handle is rotated to change the power state of the control circuit through the change-over switch, at the moment, the handle is rotated to align the first positioning hole with the positioning piece, then the pull ring is released, the positioning piece automatically falls along with gravity to position the first positioning hole, the handle is rotated to align the second positioning hole with the positioning piece, namely, the second positioning hole is positioned, the rotating switch can not directly rotate through the positioning piece, the stability and the safety are improved, the electric chassis truck is powered on and off to disconnect the connection between the switch body and the main circuit terminal group, then the on-off control of the switch body is completed through the on-off assembly, the on-off assembly is limited through the positioning assembly, three safety protections are provided, and the modular feed switch positioned in the explosion-proof shell is fully ensured, the main cavity door can be opened, the danger that mine methane, coal dust and other explosions are ignited due to electrical faults caused by insufficient separation of a circuit breaker in the modular feeder switch from an electrical gap of the main circuit is avoided, and safety guarantee is provided for maintenance personnel.

The utility model discloses further set up: the locking device is still including the locking mechanical system who is used for locking the main cavity qianmen, locking mechanical system including set up in mount on the front bezel with set up in the main cavity qianmen corresponds the fastener of the one side of front bezel, the fastener for the other end of main cavity qianmen is provided with card portion, be provided with on the mount and be used for the confession the draw-in groove that card portion passed, card portion with draw-in groove looks adaptation, locking mechanical system still includes be used for driving the main cavity qianmen to the linkage subassembly of hand (hold) direction translation, the linkage subassembly is through driving the main cavity qianmen to hand (hold) direction translation makes card portion card is located behind the mount.

Through adopting above-mentioned technical scheme, blocking device still including being used for restricting the locking mechanical system that the qianmen opened, through operation linkage subassembly make the main cavity qianmen to hand (hold) direction translation, the draw-in groove is aimed at to the card portion on the main cavity qianmen, thereby rethread linkage subassembly makes card portion pass the draw-in groove and open the main cavity qianmen, the main cavity qianmen need earlier to hand (hold) direction translation rotates again and just can open, otherwise card portion is not aligned with the draw-in groove, behind the mount is located to the card, can prevent that the main cavity qianmen from being bumped easily or personnel accident not trained opens, strengthens the security.

The utility model discloses further set up: the handle is provided with a fan-shaped clamping part for blocking the front door of the main cavity from translating, and the radius of the clamping part is matched with the distance between the handle and the front door of the main cavity.

Through adopting above-mentioned technical scheme, just can open to handle direction translation because main cavity qianmen needs earlier, and be provided with fan-shaped card portion on the handle, main cavity qianmen can not be to handle direction translation, so can't open, need rotate the handle earlier (accomplish the disconnection of switch body control power), make fan-shaped card portion no longer between handle and main cavity qianmen along with the handle rotation, then just can open the main cavity qianmen, increase safety protection, adopt the electrical protection more than quadruple fully to guarantee to be located the modular feed switch in the flame proof shell under the state that breaks away from the main circuit completely, just can open the main cavity door, avoided producing the danger that electrical fault triggered explosion such as mine methane, coal dust because of the circuit breaker among the modular feed switch breaks away from main circuit electrical gap inadequately, provide the safety guarantee to the maintenance personal.

The utility model discloses further set up: the operating device comprises a control mechanism arranged on the front door of the main cavity and a power box arranged on the inner wall of the side plate, and the control mechanism and the switch body are respectively electrically connected with the power box.

Through adopting above-mentioned technical scheme, including control mechanism, power pack, module circuit breaker and blocking device in this technical scheme, each part all sets up through the modularization, realizes interactively through RS-485 communication between each part, compares in the mechanism of prior art complicacy, and the structure is clearer, and the part modularization is convenient for the inspection, is changed, and the maintenance is simple, need not professional technical staff and maintains or returns the factory and send the repair, can not hinder the work progress under the ore deposit, avoids causing huge production loss.

The utility model discloses further set up: the control mechanism comprises a button assembly and a display screen for observing the condition in the main cavity, the display screen is electrically connected with the power box, the switch body and the button assembly respectively, and the button assembly is electrically connected with the change-over switch, the switch body and the electric chassis vehicle respectively.

By adopting the technical scheme, the display screen on the front door of the main cavity can display the opening and closing states of the module circuit breaker and the states of the module circuit breaker in the flameproof shell such as whether the module circuit breaker is in place or not (namely whether the module circuit breaker is completely separated from the main circuit and enters a safe distance or not), compared with the prior art, the switch-on/off state of the module circuit breaker in the main cavity is controlled by operating the button assembly on the front door of the main cavity, and the electric chassis vehicle is controlled to drive the module circuit breaker to advance and retreat (the main circuit is switched on and off), through moving spring needle file control main circuit on, disconnected, need increase and lift needle mechanism, the structure is complicated, through the rotatory pivot of spanner on the push-and-pull rod, accomplishes to impel, withdraw from, wastes time and energy, and this technical scheme only needs according to the display screen content, and a series of operations can be accomplished to the operation button subassembly, labour saving and time saving, easy operation, and more accurate.

The utility model discloses further set up: the flameproof partition board is further provided with a control and communication circuit terminal group and an auxiliary line terminal group, the side boards comprise a left side board and a right side board, a main circuit wire inlet bell mouth and an intrinsic safety connection box are arranged at the position, corresponding to the wiring cavity, of the left side board, and a main circuit wire outlet bell mouth and an auxiliary line outlet are arranged at the position, corresponding to the wiring cavity, of the right side board.

By adopting the technical scheme, the connecting wires of the main circuit terminal group, the control and communication circuit terminal group and the auxiliary wire terminal group are placed in the wiring cavity, so that wiring in the main cavity is not needed, and the maintenance is very convenient; a main circuit outlet bell mouth and an auxiliary line outlet are arranged on the position of the right side plate corresponding to the wiring cavity, and a main circuit inlet bell mouth and an intrinsic safety wiring box (for connecting the inlet and outlet wires of the control and communication circuit) are arranged on the position of the left side plate corresponding to the wiring cavity, so that the requirements of each inlet and outlet wire are met; compared with the prior art that the circuits are arranged on the left side, the right side, the front side and the rear side, all the circuits are arranged in a left-in and right-out mode, and the circuit is clear and concise and convenient to install and maintain; when the switch combination is needed to be butted, a main circuit incoming line bell mouth on the left side of the wiring cavity shell can be replaced by a butting flange, and the building block type use combination is realized through the butting flange between the switch and the switch.

The following describes embodiments of the present invention with reference to the drawings and examples.

Drawings

Fig. 1 is a partial structural plan view of an embodiment of the present invention;

fig. 2 is a side view of a partial structure of an embodiment of the present invention;

FIG. 3 is a first block diagram of a locking mechanism according to an embodiment of the present invention;

FIG. 4 is a second structural view of the locking mechanism according to the embodiment of the present invention;

fig. 5 is a front view of a partial structure of a power supply start state according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of the scram trip mechanism and the transfer switch according to the embodiment of the present invention;

fig. 7 is a schematic diagram of the feeding mechanism according to the embodiment of the present invention;

reference numerals: 1. the explosion-proof shell comprises an explosion-proof shell, 11 parts of a front plate, 12 parts of a rear plate, 13 parts of side plates, 131 parts of a left side plate, 132 parts of a right side plate, 14 parts of an explosion-proof partition plate, 15 parts of a main cavity, 16 parts of a wiring cavity, 2 parts of an operating device, 21 parts of a control mechanism, 211 parts of a button assembly, 212 parts of a display screen, 22 parts of a power box, 3 parts of a switch body, 4 parts of a main circuit terminal set, 5 parts of an electric chassis, 6 parts of a main cavity front door, 7 parts of a locking device, 71 parts of an emergency stop tripping mechanism, 711 parts of an opening and closing assembly, 7111 parts of a mounting seat, 7112 parts of a handle, 71121 parts of a first positioning hole, 71122 parts of a second positioning hole, 71124 parts of a sector clamping part, 7113 parts of a rotating shaft, 71131 parts of a groove, 712 parts of a positioning assembly, 7121 parts of a fixed seat, 7122 parts, 71221 parts of a pull ring, 72 parts of a change-over switch, 721 parts of a mounting block, 82. the main circuit comprises a mounting plate, 9. a linkage assembly, 110. a control and communication circuit terminal group, 120. an auxiliary line terminal group, 130. a main circuit inlet wire bell mouth, 140. an intrinsic safety junction box, 150. a main circuit outlet wire bell mouth and 160. an auxiliary line outlet.

Detailed Description

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Referring to the attached drawings 1-7, the numerical control flame-proof and intrinsic safety type vacuum feed switch disclosed in this embodiment includes a flame-proof housing 1 and a main cavity front door 6, the flame-proof housing 1 includes a front plate 11, a rear plate 12 and a side plate 13, a flame-proof partition 14 is disposed between the front plate 11 and the rear plate 12, the flame-proof partition 14 divides the flame-proof housing 1 into a main cavity 15 and a wiring cavity 16, a switch body 3 is disposed in the main cavity 15, a main circuit terminal group 4 is disposed on the flame-proof partition 14 at a position corresponding to the switch body, an operation device 2 for switching on and off the connection between the switch body 3 and the main circuit terminal group 4 is disposed on the main cavity front door 6, an electric chassis vehicle 5 for controlling the switch body 3 to contact with or be away from the main circuit terminal group 4 is disposed at the bottom of the main cavity 15, the switch body 3 is fixedly disposed on the electric chassis vehicle 5, the operating device 2 is respectively electrically connected with the switch body 3 and the electric chassis truck 5, a locking device 7 is arranged between the front door 6 of the main cavity and the front plate 11, and the locking device 7 is electrically connected with the switch body 3.

The embodiment further provides that: the locking device 7 comprises an emergency stop tripping mechanism 71 arranged on the front plate 11 and a transfer switch 72 arranged in the main cavity 15, the transfer switch 72 is electrically connected with the switch body 3, the emergency stop tripping mechanism 71 comprises an opening and closing component 711 for opening and closing the transfer switch 72 and a positioning component 712 for positioning the opening and closing component 711, a through hole is formed in the front plate 11, and one end of the opening and closing component 711, which corresponds to the rear plate 12, penetrates through the through hole to be matched with the transfer switch 72.

The embodiment further provides that: the opening and closing assembly 711 comprises a mounting seat 7111, a handle 7112 and a rotating shaft 7113, wherein the mounting seat 7111 is fixedly arranged at the position, corresponding to the change-over switch 72, of the front plate 11, a through hole matched with the rotating shaft 7113 is formed in the mounting seat 7111, one end, corresponding to the change-over switch 72, of the rotating shaft 7113 is provided with a groove 71131 for opening and closing the change-over switch 72, and the other end of the rotating shaft 7113 penetrates through the through hole to be connected with the handle 7112.

The embodiment further provides that: be provided with mounting bracket 8 on curb plate 13, mounting bracket 8 including be used for with fixed plate 81 that curb plate 13 is connected with be used for with mounting panel 82 that change over switch 72 is connected, mounting panel 82 with front bezel 11 parallels, mounting panel 82 is provided with the through-hole, change over switch 72 set up in mounting panel 82 rear end face, change over switch 72 corresponds the one end of axis of rotation 7113 is provided with and is used for opening and close change over switch 72's turning block 721, turning block 721 passes mounting panel 82's through-hole with the recess 71131 cooperatees.

The embodiment further provides that: positioning element 712 including set up in the fixing base 7121 of hand (hold) 7112 top with set up in the setting element 7122 of fixing base 7121 top, be provided with the confession on the fixing base 7121 setting element 7122 upper and lower gliding slide channel, slide channel with setting element 7122 looks adaptation, setting element 7122 for the other end of fixing base 7121 is provided with pull ring 71221, be provided with the first locating hole 71121 that is used for fixing a position the power on-state on the hand (hold) 7112 and be used for fixing a position the second locating hole 71122 of power off-state, first locating hole 71121 with contained angle between the second locating hole 71122 equals 180 degrees, first locating hole 71121 second locating hole 71122 with setting element 7122 looks adaptation.

The utility model discloses among the technical scheme, preferred further setting: the handle 7112 is further provided with a third positioning hole for positioning the power supply tripping state, the third positioning hole is arranged between the first positioning hole 71121 and the positioning hole, and an included angle between the third positioning hole and the second positioning hole 71122 is 90 degrees.

The embodiment further provides that: the locking device 7 further comprises a locking mechanism 73 for locking the front door 6 of the main cavity, the locking mechanism 73 comprises a fixing frame 731 arranged on the front plate 11 and a fastener 732 arranged on one surface of the front plate 11 corresponding to the front door 6 of the main cavity, the fastener 732 is provided with a fastening portion 7321 relative to the other end of the front door 6 of the main cavity, a clamping groove 7311 for allowing the fastening portion 7321 to pass is arranged on the fixing frame 731, the fastening portion 7321 is matched with the clamping groove 7311, the locking mechanism 73 further comprises a linkage assembly 9 for driving the front door 6 of the main cavity to translate in the direction of the handle 7112, and the linkage assembly 9 drives the front door 6 of the main cavity to translate in the direction of the handle 7112 so that the fastening portion 7321 is fastened behind the fixing frame 731.

The embodiment further provides that: the handle 7112 is provided with a fan-shaped clamping portion 71124 for blocking the translation of the front cavity door 6, and the radius of the clamping portion 7321 is matched with the distance between the handle 7112 and the front cavity door 6.

The embodiment further provides that: the operation device 2 comprises 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 plate 13, and the control mechanism 21 and the switch body 3 are respectively electrically connected with the power box 22.

The embodiment further provides that: the control mechanism 21 includes a button assembly 211 and a display screen 212 for observing conditions in the main cavity 151, the display screen 212 is electrically connected to the power supply box 22, the switch body 3 and the button assembly 211, respectively, and the button assembly 211 is electrically connected to the switch body 3 and the electric chassis 5, respectively.

The above-mentioned "between" does not only mean between orientations and positions, but also means between the interactions of different parts. The left and right sides are viewed from the front of the main cavity of the feeder switch.

Although the terms of the flameproof housing 1, the front plate 11, the rear plate 12, the side plate 13, the left side plate 131, the right side plate 132, the flameproof partition 14, the main cavity 15, the wiring cavity 16, the operating device 2, the control mechanism 21, the power supply box 22, the button assembly 211, the display screen 212, the switch body 3, the main circuit terminal group 4, the electric chassis 5, the main cavity front door 6, the locking device 7, the emergency stop trip mechanism 71, the opening and closing assembly 711, the mounting seat 7111, the handle 7112, the first positioning hole 71121, the second positioning hole 71122, the third positioning hole 71123, the sector-shaped clamping portion 71124, the rotating shaft 7113, the groove 71131, the positioning assembly 712, the fixing seat 7121, the positioning member 7122, the tab 71221, the change-over switch 72, the rotating block 721, the locking mechanism 73, the fixing frame 731, the clamping groove 7311, the clamping member 732, the clamping portion 7321, the mounting frame 8, the fixing plate 81, the mounting plate 82, the linkage assembly 9, and the. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A numerical control flame-proof and intrinsic safety type vacuum feed switch is characterized in that: the explosion-proof shell comprises a front plate, a rear plate and side plates, an explosion-proof partition plate is arranged between the front plate and the rear plate and divides the explosion-proof shell into a main cavity and a wiring cavity, a switch body is arranged in the main cavity, a main circuit terminal group is arranged on the position, corresponding to the switch body, of the explosion-proof partition plate, an operating device for switching on and off the connection between the switch body and the main circuit terminal group is arranged on the front door of the main cavity, an electric chassis truck for controlling the switch body to contact or keep away from the main circuit terminal group is arranged at the bottom of the main cavity, the switch body is fixedly arranged on the electric chassis truck, the operating device is respectively electrically connected with the switch body and the electric chassis truck, and a locking device is arranged between the front door and the front plate, the locking device is electrically connected with the operating device and the switch body respectively.

2. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 1, characterized in that: the locking device comprises an emergency stop tripping mechanism arranged on the front plate and a change-over switch arranged in the main cavity, the change-over switch is electrically connected with the switch body, the emergency stop tripping mechanism comprises an opening and closing assembly used for opening and closing the change-over switch and a positioning assembly used for positioning the opening and closing assembly, a through hole is formed in the front plate, and one end, corresponding to the rear plate, of the opening and closing assembly penetrates through the through hole to be matched with the change-over switch.

3. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 2, characterized in that: the opening and closing assembly comprises a mounting seat, a handle and a rotating shaft, the mounting seat is fixedly arranged on the position, corresponding to the change-over switch, of the front plate, a through hole matched with the rotating shaft is formed in the mounting seat, the rotating shaft corresponds to one end of the change-over switch, a groove used for opening and closing the change-over switch is formed in the end of the change-over switch, and the other end of the change-over switch penetrates through the through hole to be connected with the handle.

4. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 3, characterized in that: be provided with the mounting bracket on the curb plate, the mounting bracket including be used for with the fixed plate that the curb plate is connected with be used for with the mounting panel that change over switch is connected, the mounting panel with the front bezel is parallel, the mounting panel is provided with the through-hole, change over switch set up in mounting panel rear end face, change over switch corresponds the one end of axis of rotation is provided with and is used for opening and close change over switch's turning block, the turning block passes the through-hole of mounting panel with the recess cooperatees.

5. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 3, characterized in that: the locating component comprises a fixing seat and a locating piece, wherein the fixing seat is arranged above the handle, the locating piece is arranged above the fixing seat, a sliding channel is arranged on the fixing seat and used for sliding the locating piece up and down, the sliding channel is matched with the locating piece, the locating piece is arranged relative to the other end of the fixing seat and provided with a pull ring, a first locating hole used for locating a power supply opening state and a second locating hole used for locating a power supply closing state are arranged on the handle, a included angle between the first locating hole and the second locating hole is equal to 180 degrees, and the first locating hole is matched with the second locating hole.

6. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 3, characterized in that: the locking device is still including the locking mechanical system who is used for locking the main cavity qianmen, locking mechanical system including set up in mount on the front bezel with set up in the main cavity qianmen corresponds the fastener of the one side of front bezel, the fastener for the other end of main cavity qianmen is provided with card portion, be provided with on the mount and be used for the confession the draw-in groove that card portion passed, card portion with draw-in groove looks adaptation, locking mechanical system is still including being used for driving the main cavity qianmen to the linkage subassembly of hand (hold) direction translation, the linkage subassembly is through driving the main cavity qianmen to hand (hold) direction translation makes card portion card is located behind the mount.

7. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 6, characterized in that: the handle is provided with a fan-shaped clamping part for blocking the front door of the main cavity from translating, and the radius of the clamping part is matched with the distance between the handle and the front door of the main cavity.

8. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 2, characterized in that: the operating device comprises a control mechanism arranged on the front door of the main cavity and a power box arranged on the inner wall of the side plate, and the control mechanism and the switch body are respectively electrically connected with the power box.

9. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 8, characterized in that: the control mechanism comprises a button assembly and a display screen for observing the condition in the main cavity, the display screen is electrically connected with the power box, the switch body and the button assembly respectively, and the button assembly is electrically connected with the change-over switch, the switch body and the electric chassis vehicle respectively.

10. The numerical control explosion-proof and intrinsically safe vacuum feed switch of claim 1, characterized in that: the flameproof partition board is further provided with a control and communication circuit terminal group and an auxiliary line terminal group, the side boards comprise a left side board and a right side board, a main circuit wire inlet bell mouth and an intrinsic safety connection box are arranged at the position, corresponding to the wiring cavity, of the left side board, and a main circuit wire outlet bell mouth and an auxiliary line outlet are arranged at the position, corresponding to the wiring cavity, of the right side board.