CN115985711B - High-voltage explosion-proof switch - Google Patents

Abstract

The invention discloses a high-voltage explosion-proof switch, which comprises an explosion-proof shell and a switch unit arranged in the explosion-proof shell, wherein the explosion-proof shell comprises a shell and a door cover arranged on the shell, an operating mechanism for controlling the switch unit to be switched on or off is arranged in a main cavity in the shell, a mechanical locking mechanism is arranged on the shell, and a door locking state and a door opening state are arranged between the mechanical locking mechanism and the door cover; the mechanical linkage mechanism is arranged between the operating mechanism and the mechanical locking mechanism, and the mechanical locking mechanism is used for switching between a door locking state and a door opening state and correspondingly driving the operating mechanism to move between a closing position and a separating position. According to the high-voltage explosion-proof switch provided by the invention, the mechanical locking mechanism and the operating mechanism are mutually linked through the mechanical linkage mechanism, the operating mechanism is in a closing state when the door cover is opened, other power switches on the explosion-proof switch cannot be closed, the whole explosion-proof switch and the power side are in a power-off state, and the safety of operators is ensured.

Description

High-voltage explosion-proof switch

Technical Field

The invention relates to the technical field of electric switches, in particular to a high-voltage explosion-proof switch.

Background

The high-voltage explosion-proof switch is suitable for the environment containing explosive gas in underground coal mines and other surrounding media, and in the line from 50hz to 1140v in alternating current, the high-voltage explosion-proof switch can be used as a main switch and a branch switch of a power supply system or as a feed switch for a mining explosion-proof mobile transformer substation, and can also be used as a low-frequency starting of a large-capacity motor, has the functions of overload, short circuit, undervoltage, leakage protection and the like, has the functions of ensuring the working environment of power equipment in the underground coal mines, and needs to open a switch box door for maintenance when the explosion-proof switch fails or reaches a specified maintenance period, and is specified in the general safety technical requirements of underground coal mine power supply systems and equipment for ensuring safe operation: "when the power is on, the cover cannot be opened, and after the cover is opened, the power cannot be turned on". In addition, the regulations of the safety regulations for coal mine 2011, item 445: "electrical equipment must not be overhauled and moved downhole. The lock of … … all switches must be reliable against unauthorized power delivery, against unauthorized opening of the cover, the switch handle must be locked when the power is turned off, and hang a warning sign in the form of "someone is working, not authorized to deliver power" and only the person performing the work has the right to remove the sign to deliver power.

At present, all the explosion-proof control switches are provided with a connecting mechanism which can operate the isolating switch in the explosion-proof shell by an isolating switch operating handle outside the explosion-proof shell, the switch has no fault conditions such as leakage, short circuit and the like, the isolating switch operating handle can close the explosion-proof control switch to transmit power, the power supply side of the explosion-proof control switch is powered on, so that the explosion-proof control switch is in an operating state, when the explosion-proof switch breaks down or reaches a specified maintenance period, the isolating switch operating handle is used for controlling the explosion-proof control switch to be disconnected, and then an explosion-proof shell cover is opened for maintenance, for example, the explosion-proof switch for mining is disclosed by the publication number CN103378548A, the explosion-proof switch for mining is disclosed in the patent application of 10 months and 30 days in 2013, and the explosion-proof switch comprises a box body, a wiring cavity and a main cavity, wherein a control transformer, the isolating switch, a far-near control switch, a vacuum contactor, an electronic protector and a current transformer are arranged in the main cavity; a handle, a stop button and a start button are arranged on one side of the box body, and the handle is used for breaking and closing the isolating switch or reversing; for another example, the invention patent application with publication number CN107887207A, named explosion-proof switch locking device, publication date 2018, 4-month and 6-day, comprises a bottom plate, a guide rail frame, a sliding sleeve, a sliding plate, a vertical rod, a U-shaped sheath and a warning board. The guide rail frame is integrated with the bottom plate rigid coupling, be equipped with the location tooth on the guide rail, the sliding sleeve cover is on the guide rail and with guide rail sliding fit, the slide is equipped with the locking piece on facing to a bottom plate side, the locking piece top is equipped with two lugs, tooth piece upper end cover is in the axle and with axle swivelling fit, tooth piece middle section and locking piece joint cooperation, the slide top is equipped with the pole setting, the pole setting top is equipped with U type sheath, the one end of sheath is equipped with the riser, this riser cross-section is square pipe, peg graft on the riser has the warning sign. According to the invention, the U-shaped sheath slides on the guide rail to follow the handle of the explosion-proof switch, so that the sheath always surrounds the handle of the explosion-proof switch, and the space for operating the handle is not reserved, thereby achieving the purpose of preventing random misoperation.

According to the operation requirement of the high-voltage explosion-proof switch, when the feed power supply is connected, the explosion-proof shell cover cannot be opened, the power supply cannot be connected after the explosion-proof shell cover is opened, however, the existing high-voltage explosion-proof switch is powered off and powered on through an operation handle, the door of the explosion-proof shell is locked and unlocked through a door lock, so that the explosion-proof door is opened and the high-voltage explosion-proof switch is powered off for two operations, misoperation or illegal operation is caused for underground electricians, the mining explosion-proof switch power supply is opened in an electrified mode, so that the mining explosion-proof switch power supply has a large safety risk, and the problem is solved by means of supervision by special personnel and on-site prompt boards in the prior art, and the problem still exists.

Disclosure of Invention

The invention aims to provide a high-voltage explosion-proof switch so as to solve the defects in the prior art.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a high-voltage explosion-proof switch, includes the flameproof shell and installs switch unit in the flameproof shell, the flameproof shell includes the casing and sets up door closure on the casing, be provided with the control in the inside main cavity of casing switch-on or separating brake operating device still includes:

a mechanical locking mechanism arranged on the shell, wherein a door locking state and a door opening state are arranged between the mechanical locking mechanism and the door cover;

and the mechanical linkage mechanism is arranged between the operating mechanism and the mechanical locking mechanism, and the mechanical locking mechanism is switched between the door locking state and the door opening state to correspondingly drive the operating mechanism to move between a closing position and a separating position.

The high-voltage explosion-proof switch is characterized in that the mechanical locking mechanism comprises a locking piece arranged in the shell and a driving piece for driving the locking piece to move, and the door cover is provided with a locking structure corresponding to the locking piece.

In the high-voltage explosion-proof switch, the driving piece comprises a rotary cam and a driving rod capable of driving the rotary cam to move.

According to the high-voltage explosion-proof switch, the driving rod extends out of the shell to be provided with the operation end, and the operation end is detachably connected with the operation rod.

The high-voltage explosion-proof switch comprises the locking piece, wherein the locking piece comprises an elastic restoring piece and a sliding plate arranged on the inner wall of the shell in a sliding mode, the elastic restoring piece and the rotating cam are arranged on two opposite sides of the sliding plate, locking pins are arranged on the sliding plate, and the locking structure comprises locking holes corresponding to the locking pins.

The high-voltage explosion-proof switch comprises a high-voltage grounding switch, wherein the high-voltage grounding switch comprises a knife body and a knife holder, and the knife body comprises a mounting seat and a knife arranged on the mounting seat.

The high-voltage explosion-proof switch comprises the operating mechanism, wherein the operating mechanism comprises a cylindrical rotating seat, the mounting seat is fixedly arranged on the cylindrical rotating seat, and the cylindrical rotating seat can be driven by the mechanical linkage mechanism to move between the closing position and the opening position.

The high-voltage explosion-proof switch is characterized in that the mechanical linkage mechanism comprises a rotating body, and the rotating body is connected with the mechanical locking mechanism through a connecting piece.

The high-voltage explosion-proof switch further comprises a locking mechanism which is arranged corresponding to the operating mechanism, the locking mechanism is driven by the mechanical linkage mechanism to have a locking state and an unlocking state, and when the operating mechanism is in a closing state, the locking mechanism is in the locking state so as to lock the cylindrical rotating seat or the mounting seat.

The high-voltage explosion-proof switch is characterized in that the locking mechanism comprises a motion assembly, the motion assembly is in transmission connection with the mechanical linkage mechanism through a transmission assembly, a locking piece is arranged on the motion assembly, and a locking structure corresponding to the locking piece is arranged on the cylindrical rotating seat or the mounting seat.

In the technical scheme, the high-voltage explosion-proof switch comprises an explosion-proof shell and a switch unit arranged in the explosion-proof shell, wherein the explosion-proof shell comprises a shell and a door cover arranged on the shell, an operating mechanism for controlling the switch unit to be closed or opened is arranged in a main cavity in the shell, a mechanical locking mechanism corresponding to the door cover is arranged on the shell, a mechanical linkage mechanism is arranged between the mechanical locking mechanism and the operating mechanism, the mechanical locking mechanism and the operating mechanism are mutually linked through the mechanical linkage mechanism, in the operation process, when the door cover is opened and is in a door opening state, the operating mechanism is in a closing state, other power switches on the explosion-proof switch cannot be closed, the whole explosion-proof switch and the power side are in a power-off state, and when the door cover is closed and is in a door locking state, the operating mechanism is in a door opening state, and then the power switch can be closed, so that an operator can be closed, and the safety of the operation personnel in the fault removal and maintenance process is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a high-voltage explosion-proof switch according to another embodiment of the present invention;

FIG. 2 is a schematic structural view of an operating mechanism according to another embodiment of the present invention in a brake release position;

fig. 3 is a schematic structural view of an operating mechanism according to another embodiment of the present invention in a closing position;

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

FIG. 5 is a schematic diagram of a mechanical linkage according to another embodiment of the present invention;

FIG. 6 is a second schematic diagram of a mechanical linkage according to another embodiment of the present invention;

FIG. 7 is a schematic view illustrating the installation of a mechanical linkage according to yet another embodiment of the present invention;

FIG. 8 is a schematic diagram of a mechanical locking mechanism according to an embodiment of the present invention;

FIG. 9 is a second schematic diagram of a mechanical locking mechanism according to an embodiment of the present invention;

FIG. 10 is a schematic view of a knife switch according to another embodiment of the present invention;

FIG. 11 is a schematic structural view of a tool holder according to another embodiment of the present invention;

fig. 12 is a schematic structural view of a motion assembly according to still another embodiment of the present invention.

Reference numerals illustrate:

1. an explosion-proof housing; 1.1, a shell; 1.2, a door cover; 2. an operating mechanism; 2.1, a knife switch body; 2.2, locking structure; 2.3, a tool apron; 2.4, a movement cavity; 2.5, a motion through hole; 2.6, high voltage grounding switch; 2.7, a mounting seat; 3. a mechanical locking mechanism; 3.1, a locking piece; 3.2, a driving piece; 3.3, rotating the cam; 3.4, driving rod; 3.5, an operation end; 3.6, sliding plate; 3.7, elastic restoring piece; 3.8, locking pin; 3.9, a locking structure; 4. a mechanical linkage mechanism; 4.1, a rotator; 4.2, a cylindrical rotating seat; 4.3, torsion springs; 5. a locking mechanism; 5.1, a motion assembly; 5.2, a motion plate; 5.3, locking lever; 5.4, fixing a connecting rod; 5.5, sliding blocks; 6. a transmission assembly; 6.1, a transmission gear; 6.2, a rack; 6.3, fixing base; 6.4, a strip-shaped groove; 6.5, a motion column; 7. and fixing the bottom plate.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-12, the high-voltage explosion-proof switch provided by the embodiment of the invention comprises an explosion-proof shell 1 and a switch unit arranged in the explosion-proof shell 1, wherein the explosion-proof shell 1 comprises a shell 1.1 and a door cover 1.2 arranged on the shell 1.1, an operating mechanism 2 for controlling the switch unit to be switched on or off is arranged in a main cavity in the shell 1.1, a mechanical locking mechanism 3 is arranged on the shell 1.1, a door locking state and a door opening state are arranged between the mechanical locking mechanism 3 and the door cover 1.2, a mechanical linkage mechanism 4 is arranged between the operating mechanism 2 and the mechanical locking mechanism 3, and the mechanical locking mechanism 3 correspondingly drives the operating mechanism 2 to move between a switch-on position and a switch-off position in a switching-on state between the door locking state and the door opening state.

Specifically, the flameproof housing 1 includes a rectangular housing 1.1, a main cavity and a wiring cavity of a flameproof structure are provided in the housing 1.1, a switch unit and other electrical components are all installed in the main cavity, an operating mechanism 2 is disposed at a side portion of the main cavity, a switch component corresponding to the operating mechanism 2 is disposed on the switch unit, the switch component and the operating mechanism 2 jointly form a switch structure for powering off and powering on the high-voltage flameproof switch, the switch structure can be a high-voltage grounding switch 2.6, and can also be a switch structure of other structures, such as an isolating switch, etc., in the embodiment, the switch structure is used for describing the high-voltage grounding switch 2.6, and the high-voltage grounding switch 2.6 has two functions in use: firstly, prevent that maloperation from sending power and suddenly coming into charge and arousing the electric shock accident, secondly, can put out surplus charge, be favorable to overhauling safety, thereby guarantee equipment and personal's safety, operating device 2 is used for operating high-voltage earthing switch 2.6, make high-voltage earthing switch 2.6 switch between closing state and separating brake state, when operating device 2 drive high-voltage earthing switch 2.6 is in separating brake state, can carry out closing operation to remaining switch this moment, thereby make explosion-proof control switch's power side get electric, when operating device 2 drive high-voltage earthing switch 2.6 is in closing state, other switch on the explosion-proof switch can't be closed, whole explosion-proof switch and power side are all in the outage state, thereby ensure operating personnel's safety in troubleshooting and maintenance process.

In this embodiment, an opening for an operator to operate a switch unit, an electrical element, a switch structure and the like in the main cavity and the wiring cavity is provided on the housing 1.1, the door cover 1.2 is mounted on the opening, the opening can be opened or closed by the door cover 1.2, the door cover 1.2 is rotatably connected to the housing 1.1, the door cover 1.2 can be connected to the housing 1.1 in a sliding manner by rotating the door cover 1.2 to open or close the opening, the door cover 1.2 can be slid up and down to open or close the opening, a mechanical locking mechanism 3 is provided on the housing 1.1, the mechanical locking mechanism 3 is correspondingly provided with the door cover 1.2, when the door cover 1.2 is closed on the opening, the door cover 1.2 can be locked by the mechanical locking mechanism 3, so that the door cover 1.2 is in a door locking state, and when the door cover 1.2 is unlocked by the mechanical locking mechanism 3, the door cover 1.2 is in a door opening state, and the door cover 1.2 can be opened by operating.

In the embodiment, the mechanical linkage mechanism 4 is arranged between the operating mechanism 2 and the mechanical locking mechanism 3, the mechanical linkage mechanism 4 and the operating mechanism 2 form a structure which is connected in a transmission way in sequence, so that the opening position of the operating mechanism 2 corresponds to the door locking state of the mechanical locking mechanism 3, the closing position of the operating mechanism 2 corresponds to the door opening state of the mechanical locking mechanism 3, in the use process, when the mechanical locking mechanism 3 is in the door locking state, the operating mechanism 2 is in the opening position, the power supply side of the high-voltage explosion-proof switch is powered, when the door cover 1.2 needs to be opened, an operator operates the mechanical locking mechanism 3 to enable the mechanical locking mechanism 3 to move to gradually switch from the door locking state to the door opening state, the process is a door cover unlocking stroke, in the process, the operating mechanism 2 moves from the opening position to the closing position, the high-voltage explosion-proof switch is in a power-off state, the electrical components and the switch units in the shell 1.1 are not electrified, then the door cover 1.2 can be opened for maintenance and detection operation, the phenomenon that an operator directly opens the door cover 1.2 without carrying out the power-off operation of the high-voltage explosion-proof switch can be avoided, after the operation is finished, the operator operates the mechanical locking mechanism 3 to enable the mechanical locking mechanism 3 to move so as to gradually switch from the door opening state to the door locking state, the process is a door cover locking stroke, in the process, the operating mechanism 2 moves from a closing position to a separating position, after the door cover 1.2 is determined to be completely locked, then other power switches are closed, so that the high-voltage explosion-proof switch works, and the fact that when a switch structure formed by a switch component and the operating mechanism 2 is not the high-voltage grounding switch 2.6 is needed to be explained, the correspondence between the opening position and closing position of the operating mechanism 2 and the door locking state and door opening state of the mechanical locking mechanism 3 may be different, where the opening position and closing position are simply a position switch, even a position name may be said, for example, the swing stroke of the switch has two positions, the left side is closing, the right side is opening, obviously, the opening position may be installed or selected as the left side, the opening position and closing position on the right side, that is, essentially, there is a position correspondence between the operating mechanism 2 and the mechanical locking mechanism 3, but the correspondence is not unique but adjustable.

The embodiment of the invention provides a high-voltage explosion-proof switch, which comprises an explosion-proof shell 1 and a switch unit arranged in the explosion-proof shell 1, wherein the explosion-proof shell 1 comprises a shell 1.1 and a door cover 1.2 arranged on the shell 1.1, an operating mechanism 2 for controlling the switch unit to be switched on or off is arranged in a main cavity in the shell 1.1, a mechanical locking mechanism 3 corresponding to the door cover 1.2 is arranged on the shell 1.1, a mechanical linkage mechanism 4 is arranged between the mechanical locking mechanism 3 and the operating mechanism 2, the mechanical locking mechanism 3 and the operating mechanism 2 are mutually linked through the mechanical linkage mechanism 4, the operating mechanism 2 is ensured to be in a switching-on state when the door cover 1.2 is opened in a door opening state in an operating process, other power switches on the explosion-proof switch can not be switched on, the whole explosion-proof switch and the power supply side are all in a power-off state, and the operating mechanism 2 is in a switching-off state only after the door cover 1.2 is closed in a door locking state, and then the power switch can be operated to be switched on, so that an operator can be ensured to remove faults and a safety overhaul process in the process.

In the embodiment provided by the invention, preferably, the mechanical locking mechanism 3 comprises a locking piece 3.1 arranged in the shell 1.1 and a driving piece 3.2 for driving the locking piece 3.1 to move, the locking piece 3.9 corresponding to the locking piece 3.1 is arranged on the door cover 1.2, the locking piece 3.9 is fixedly arranged on the inner side wall of the door cover 1.2, when the mechanical locking mechanism 3 is in a door locking state, the locking piece 3.1 is correspondingly locked with the locking piece 3.9 to realize locking between the door cover 1.2 and the shell 1.1, when the mechanical locking mechanism 3 is in a door opening state, the locking piece 3.1 and the locking piece 3.9 are separated, at the moment, an opening on the shell 1.1 can be opened through the door cover 1.2, and in the unlocking stroke of the door cover 1.2, the movement modes of the driving piece 3.2 and the locking piece 3.1 can be the same or different, for example, the driving piece 3.2 and the locking piece 3.1 can both rotate or move linearly, and the driving piece 3.1 can also move linearly.

In the embodiment provided by the invention, preferably, the driving piece 3.2 comprises a rotary cam 3.3 and a driving rod 3.4 capable of driving the rotary cam 3.3 to move, the driving rod 3.4 extends out of the shell 1.1 to the outer side of the shell 1.1 and is provided with an operating end 3.5, and the operating end 3.5 is detachably connected with the operating rod; be provided with the mounting hole on casing 1.1, actuating lever 3.4 rotates and sets up in the mounting hole, actuating lever 3.5 is located the outside of casing 1.1, be provided with the connection structure who is connected with the actuating lever on actuating lever 3.5, rotatory cam 3.3 and latch member 3.1 all are located the inside of casing 1.1, when so needing to open door lid 1.2, be connected with actuating lever 3.5 with one end of actuating lever, drive rotatory to actuating lever 3.4 through the actuating lever, rotatory cam 3.3 rotates and can correspond actuating lever 3.1 to rotate, latch member 3.1 and latch structure 3.9 looks separation so that mechanical latch mechanism 3 is in the state of opening, then the opening on casing 1.1 is opened to accessible door lid 1.2, when needs to close the opening through door lid 1.2, thereby carry out reverse drive rotation to actuating lever 3.4 with actuating lever 3.3 along with actuating lever 3.4, thereby can also be in the position of the corresponding actuating lever 3.1 to the actuating lever 3.5 and can be in the mechanical closure mechanism 3.9 when the mechanical closure mechanism 3.5 is in the state of opening that can be in the same place, can also be in the opening of the casing 1.1, can be avoided at the opening of the mechanical closure body, can be in the state of opening at the same time, the mechanical closure body is can be realized, the mechanical closure 3.5, can be in the mechanical closure 3.5, and can be in the position at the position is in the position of the opening is in the state of the opening 3.5, and can be in the position at the same place.

In the embodiment provided by the invention, preferably, the locking piece 3.1 is a structure capable of being driven by the rotating cam 3.3 to correspondingly move, and in the door unlocking stroke and the door locking stroke, when the rotating cam 3.3 rotates along with the driving rod 3.4, the locking piece 3.1 can synchronously rotate or can also do linear motion, and the following description is made by a structure in which the locking piece 3.1 does linear motion: the locking piece 3.1 comprises an elastic restoring piece 3.7 and a sliding plate 3.6 arranged on the inner wall of the shell 1.1 in a sliding manner, the elastic restoring piece 3.7 and the rotating cam 3.3 are arranged on two opposite sides of the sliding plate 3.6, the sliding plate 3.6 is correspondingly abutted against the rotating cam 3.3, the sliding plate 3.6 and the elastic restoring piece 3.7 form a cam mechanism, the sliding plate 3.6 moves linearly inside the shell 1.1, meanwhile, a sliding block 5.5 is arranged at the bottom of the sliding plate 3.6, a sliding groove is formed in the inner wall of the shell 1.1, the sliding block 5.5 is connected in the sliding groove in a sliding manner, and when the sliding plate 3.6 is driven by the rotating cam 3.3 and the elastic restoring piece 3.7 respectively, the sliding block 5.5 moves along the sliding groove to enable the sliding plate 3.6 to reciprocate linearly.

In the embodiment provided by the invention, preferably, the locking pins 3.8 are arranged on the sliding plate 3.6, the locking structure 3.9 comprises locking holes corresponding to the locking pins 3.8, the locking pins 3.8 can be one, two or more, the fixed seat 6.3 corresponding to the locking pins 3.8 is fixedly arranged on the inner wall of the shell 1.1, through holes with the number identical to that of the locking pins 3.8 are arranged on the fixed seat 6.3, the locking pins 3.8 are movably connected in the through holes, the elastic restoring piece 3.7 comprises a spring piece, the spring piece is sleeved on the locking pins 3.8, one end of the spring piece is fixed on the fixed seat 6.3, the other end of the spring piece is fixed on the sliding plate 3.6, the locking structure 3.9 comprises a locking seat fixedly arranged inside the shell 1.1, the locking seat is provided with a locking hole corresponding to the locking pin 3.8, when the door cover 1.2 is closed on the shell 1.1 and the mechanical locking mechanism 3 is in a door locking state, the locking hole and the through hole are coaxial, the locking pin 3.8 is embedded into the locking hole, when the door cover 1.2 needs to be opened, the operating rod drives the driving rod 3.4 to rotate, the pressing force of the rotating cam 3.3 on the sliding plate 3.6 along with the rotation of the driving rod 3.4 is gradually reduced, the sliding plate 3.6 and the locking pin 3.8 move in a direction away from the locking hole under the action of the spring piece until the locking pin 3.8 slides out of the locking hole, the locking pin 3.8 is separated from the locking seat, and at the moment, the door cover 1.2 is in a door opening state, and then the opening on the shell 1.1 can be opened by the operating door cover 1.2.

In another embodiment provided by the invention, preferably, the high-voltage grounding switch 2.6 comprises a knife body 2.1 and a knife seat 2.3, the knife body 2.1 comprises a mounting seat 2.7 and a knife arranged on the mounting seat 2.7, a grounding connector corresponding to the knife is arranged on the knife seat 2.3, when the knife body 2.1 rotates to a closing position, the knife body 2.1 is contacted with the grounding connector on the knife seat 2.3, and when the knife body 2.1 rotates to a separating position, the knife body 2.1 is separated from the grounding connector on the knife seat 2.3.

In another embodiment provided by the invention, preferably, the operating mechanism 2 comprises a cylindrical rotating seat 4.2, a mounting groove is formed in the cylindrical rotating seat 4.2, the mounting seat 2.7 is fixedly mounted in the mounting groove, the cylindrical rotating seat 4.2 is correspondingly in transmission connection with the mechanical linkage mechanism 4, in the unlocking stroke of the door cover 1.2 and the locking stroke of the door cover 1.2, the driving rod 3.4 can correspondingly drive the cylindrical rotating seat 4.2 to rotate, the knife body 2.1 correspondingly rotates along with the cylindrical rotating seat 4.2 so as to reciprocate between a closing position and a separating brake position, for convenience of description, the moving stroke of the cylindrical rotating seat 4.2 and the knife body 2.1 from the separating brake position is called a closing moving stroke, the moving stroke of the cylindrical rotating seat 4.2 and the knife body 2.1 from the closing brake position to the separating brake position is called a separating brake moving stroke, the closing moving stroke corresponds to the door cover unlocking stroke, and the separating brake moving stroke corresponds to the door cover locking stroke.

In another embodiment provided by the invention, preferably, the mechanical linkage mechanism 4 comprises a rotating body 4.1, a connecting body is arranged between the rotating body 4.1 and the mechanical locking mechanism 3, the connecting body realizes transmission connection between the rotating body 4.1 and the driving rod 3.4, the rotating body 4.1 can be driven by the mechanical locking mechanism 3 and the connecting body to rotate in the shell 1.1, the connecting body can be a connecting sleeve or a connecting ring which fixedly connects the rotating body 4.1 and the driving rod 3.4 coaxially, so that the rotating body 4.1 and the driving rod 3.4 are fixedly connected to form an integral structure, the connecting body can also be other transmission structures, the cylindrical rotating seat 4.2 is sleeved on the rotating body 4.1, and when the driving rod 3.4 is driven to rotate, the rotating body 4.1 and the cylindrical rotating seat 4.2 can be correspondingly driven to rotate through the connecting body, and the knife body 2.1 synchronously rotates along with the cylindrical rotating seat 4.2, so that a closing motion stroke or a separating motion stroke is performed.

In another embodiment provided by the invention, preferably, in the door unlocking stroke, the mechanical locking mechanism 3 is initially in the door locking state and then in the door opening state, the door locking stroke is a movement stroke opposite to the door unlocking stroke direction, which comprises the initial door opening state and the subsequent door locking state, in the door unlocking stroke and the door locking stroke, the mechanical locking mechanism 3 is in the door locking state for a much longer time than the mechanical locking mechanism is in the door opening state, such as 90% of the strokes of the door unlocking stroke and the door locking stroke are in the door locking state, only 10% of the strokes are in the door opening state, in the closing movement stroke, the knife body 2.1 comprises the initial opening state and the subsequent opening state, in the opening movement stroke, the knife body 2.1 comprises the initial opening state and the subsequent opening state, in the switching-on movement stroke and the switching-off movement stroke, the time of the switch blade body 2.1 in the switching-off state is longer than the time of the switch blade body in the switching-on state, for example, 80% of the switching-on movement stroke and the switching-off movement stroke are in the switching-off state, and only 20% of the switching-on is in the switching-on state, so that in the door cover unlocking stroke, the switch blade body 2.1 reaches the switching-on state first, and then the mechanical locking mechanism 3 reaches the switching-off state first, and in the door cover locking stroke, the mechanical locking mechanism 3 reaches the switching-on state later, and then the switch blade body 2.1 reaches the switching-off state, so that the door cover 1.2 is locked on the shell 1.1 when the switching-on starts to work, and the above data are only for qualitative description which is convenient to understand, for example, the switching-off state is longer than the switching-on state, and are not intended to represent actual operational details.

In still another embodiment of the present invention, preferably, in order to enable the knife body 2.1 to be kept at the closing position, avoiding misoperation, thereby improving the safety of operation, a locking mechanism 5 corresponding to the operating mechanism 2 is further provided inside the casing 1.1, the locking mechanism 5 is driven by the mechanical linkage mechanism 4 to have a locking state and an unlocking state, so when the driving rod 3.4 is driven to rotate, the mechanical linkage mechanism 4 correspondingly drives the locking mechanism 5 to move, when the knife body 2.1 is in the opening state, the locking mechanism 5 is separated from the knife body 2.1 or the cylindrical rotating seat 4.2, and when the knife body 2.1 is rotated to the closing state, the locking mechanism 5 locks the knife body 2.1 or the cylindrical rotating seat 4.2, thereby enabling the knife body 2.1 to be locked in the closing state.

In still another embodiment provided by the invention, preferably, the locking mechanism 5 comprises a motion assembly 5.1 and a transmission assembly 6, the motion assembly 5.1 is used for locking or unlocking the mounting seat 2.7, the transmission assembly 6 is arranged between the mechanical linkage mechanism 4 and the motion assembly 5.1, namely, the transmission assembly 6 can correspondingly transmit the rotation of the rotating body 4.1 to the motion assembly 5.1, so that the motion assembly 5.1 can be switched between a locking state and an unlocking state, the motion assembly 5.1 comprises a motion plate 5.2 and a locking piece arranged on the motion plate 5.2, the locking piece comprises a locking rod 5.3 arranged on the motion plate 5.2, a cylindrical rotating seat 4.2 or a knife body 2.1 is provided with a locking structure 2.2 corresponding to the locking piece, a motion cavity 2.4 for the motion plate 5.2 is arranged on the knife seat 2.3, the motion plate 5.2 is connected in a sliding way in the motion cavity 2.4, a sliding limiting groove is simultaneously arranged on the motion cavity 2.4, a sliding block is arranged on the motion plate 5.2, the sliding block is arranged on the motion plate 5.2 and can be correspondingly locked in the motion plate 2.2.2.2, and the sliding block is correspondingly locked in the motion cavity 2.2.4, and the sliding rod is correspondingly locked in the motion cavity 2.2.2.2.2, and the sliding rod is correspondingly locked in the motion cavity 2.2.2.2, and the other end is locked by the locking rod 2.2.2, and the sliding block is correspondingly locked in the motion rod 2.2.2 and the locking structure is locked in the motion rod 2.2, and the sliding rod is locked in the motion limiting motion cavity 2.2.2 and the sliding block 2 is correspondingly, and the sliding block is locked in the sliding block 2 and the sliding block is locked.

In still another embodiment of the present invention, preferably, in the last operation stroke of the closing movement stroke, the knife body 2.1 is in a closing state, in order to promote the locking effect of the locking rod 5.3, the locking structure 2.2 is a kidney-shaped groove formed on the mounting seat 2.7, the depth of the kidney-shaped groove gradually changes, an inclined plane corresponding to the end of the locking rod 5.3 is formed inside the kidney-shaped groove, and in the closing movement stroke, when the knife body 2.1 rotates to the closing state, the end of the locking rod 5.3 begins to be embedded into the kidney-shaped groove, at this time, the depth of the kidney-shaped groove corresponding to the locking rod 5.3 is smaller, and as the knife body 2.1 continues to rotate, the depth of the kidney-shaped groove corresponding to the locking rod 5.3 gradually increases, and when the closing movement stroke ends, the end of the locking rod 5.3 corresponds to the position with the maximum depth of the kidney-shaped groove, the following steps: during normal use, the end part of the locking rod 5.3 is limited in the kidney-shaped groove, so that the knife switch body 2.1 is kept in a closing state, and in the initial stage of a brake release movement stroke, the inclined surface is abutted with the locking rod 5.3, so that the force exerted on the driving rod 3.4 and the rotating body 4.1 is increased, an operator can distinguish the closing movement stroke and the brake release movement stroke according to the force application, and the safety of operation is improved.

In still another embodiment of the present invention, preferably, the transmission assembly 6 includes a transmission gear 6.1 and a rack 6.2, the transmission gear 6.1 is fixedly disposed with the rotating body 4.1, the rack 6.2 is meshed with the transmission gear 6.1, a bar-shaped seat is disposed on a fixed bottom plate 7 inside the housing 1.1, a bar-shaped groove 6.4 is disposed on the bar-shaped seat, the rack 6.2 is slidably mounted in the bar-shaped groove 6.4, a connection structure is disposed at one end of the rack 6.2, the connection structure may be a moving column 6.5 fixedly connected or limitedly connected with the rack 6.2, a fixed connection rod 5.4 is disposed on the moving plate 5.2, and the fixed connection rod 5.4 is connected with the moving column 6.5, so that when the rotating body 4.1 is driven to rotate, the transmission gear 6.1 correspondingly rotates to drive the rack 6.2 to make a linear motion in the bar-shaped groove 6.4, and the rack 6.2 correspondingly drives the moving column 6.5 and the fixed connection rod 5.4 to move, thereby making the moving plate 5.2 make a reciprocating motion in the moving cavity 2.4 of the tool apron 2.3, thereby making a locking state between a locking state and a unlocking state.

In still another embodiment provided by the invention, preferably, the brake switch further comprises a torsion spring 4.3, the cylindrical rotating seat 4.2 is connected with the rotating body 4.1 through the torsion spring 4.3, two supporting legs of the torsion spring 4.3 are respectively fixed on the cylindrical rotating seat 4.2 and the rotating body 4.1, so that in a switching-on motion stroke, the cylindrical rotating seat 4.2 and the rotating body 4.1 synchronously rotate, and in a starting stage of the switching-off motion stroke, the locking rod 5.3 locks the brake switch body 2.1, at the moment, when the driving rod 3.4 and the rotating body 4.1 are driven to rotate, the cylindrical rotating seat 4.2 does not rotate, in the stage, the torsion spring 4.3 stores force, and when the rotating body 4.1 rotates to enable the locking rod 5.3 to leave a waist-shaped groove, the brake switch body 2.1 rapidly rotates under the action of the torsion spring 4.3, and meanwhile, because the torsion spring 4.3 needs to store force in the starting stage of the switching-off motion stroke, an operator can apply a large force to the switching-off motion stroke to the brake switch off motion lever 4.1, and an operator can avoid the large-off motion force to the switching-off motion lever 4.1 from a large operation force to a small operation force to a safe operation in the starting stage.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.

Claims (4)

1. The utility model provides a high-voltage explosion-proof switch, includes the flameproof shell and installs switch unit in the flameproof shell, the flameproof shell includes the casing and sets up door closure on the casing, be provided with the control in the inside main cavity of casing switch-on or separating brake operating device, its characterized in that still includes:

a mechanical locking mechanism arranged on the shell, wherein a door locking state and a door opening state are arranged between the mechanical locking mechanism and the door cover;

the mechanical linkage mechanism is arranged between the operating mechanism and the mechanical locking mechanism, and the mechanical locking mechanism is switched between the door locking state and the door opening state to correspondingly drive the operating mechanism to move between a closing position and a separating position;

the switch unit comprises a high-voltage grounding switch, wherein the high-voltage grounding switch comprises a knife switch body and a knife holder, and the knife switch body comprises a mounting seat and a knife switch arranged on the mounting seat; the operating mechanism comprises a cylindrical rotating seat, the mounting seat is fixedly arranged on the cylindrical rotating seat, and the cylindrical rotating seat can be driven by the mechanical linkage mechanism to move between the closing position and the opening position; the mechanical linkage mechanism comprises a rotating body, the rotating body is connected with the mechanical locking mechanism through a connecting body, and the mechanical linkage mechanism further comprises a locking mechanism which is arranged corresponding to the operating mechanism, the locking mechanism is driven by the mechanical linkage mechanism to have a locking state and an unlocking state, and when the operating mechanism is in a closing state, the locking mechanism is in the locking state so as to lock the cylindrical rotating seat or the mounting seat;

the locking mechanism comprises a moving assembly and a transmission assembly, the moving assembly is used for locking or unlocking the mounting seat, the transmission assembly is arranged between the mechanical linkage mechanism and the moving assembly, the transmission assembly can correspondingly transmit the rotation of the rotating body to the moving assembly, so that the moving assembly can be switched between a locking state and an unlocking state, the moving assembly comprises a moving plate and a locking piece arranged on the moving plate, the locking piece comprises a locking rod arranged on the moving plate, a locking structure corresponding to the locking piece is arranged on the cylindrical rotating seat or the knife body, a moving cavity for the moving plate to move is arranged on the knife seat, the moving plate is slidably connected in the moving cavity, a moving through hole for the locking rod to move is further arranged on the moving cavity, one end of the locking rod penetrates out of the moving through hole, the other end of the locking rod is fixedly connected with the moving plate, and therefore, when the moving plate is driven to reciprocate in the moving cavity, the locking rod moves along the moving through hole, and when the cylindrical rotating seat and the knife body rotate to a closing state along with the rotating body, the locking rod is correspondingly inserted into the locking structure to lock the locking structure, and the knife body is locked.

2. The high-voltage explosion-proof switch according to claim 1, wherein the mechanical locking mechanism comprises a locking piece arranged in the shell and a driving piece for driving the locking piece to move, and the door cover is provided with a locking structure corresponding to the locking piece;

the driving piece comprises a rotary cam and a driving rod capable of driving the rotary cam to move; the connecting body realizes the transmission connection between the rotating body and the driving rod.

3. The high-voltage explosion-proof switch according to claim 2, wherein the driving rod is provided with an operating end extending from the inside of the housing, and the operating end is detachably connected with an operating rod.

4. A high voltage explosion-proof switch according to claim 3, wherein the locking member comprises an elastic restoring member and a sliding plate provided slidably on the inner wall of the housing, the elastic restoring member and the rotary cam being provided on opposite sides of the sliding plate, the sliding plate being provided with a locking pin, the locking structure comprising a locking hole corresponding to the locking pin.

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