阅读说明：本技术 一种接触网隔离开关直接控制装置及其控制方法 (Direct control device and control method for contact net isolating switch ) 是由 范中杰 李凯 段冶 董智文 赵晓宏 于 2020-07-24 设计创作，主要内容包括：本发明提供了一种接触网隔离开关直接控制装置及其控制方法,用于控制接触网隔离开关的分闸、合闸操作,控制装置包括动力装置、传动装置和若干个限位开关和限位开关压块；限位开关压块与每个限位开关的刀闸始终同时接触；动力装置通过传动装置带动限位开关压块正向旋转,限位开关压块同时按下所有刀闸,以实现多个限位开关的常开触头同时闭合、常闭触头同时断开；动力装置通过传动装置带动限位开关压块反向旋转,开关压块同时抬起所有刀闸,以实现多个限位开关的常开触头同时断开、常闭触头同时闭合。本发明提出的方案不含继电器、接触器,机械联动,动作可靠,不会受到接触网的强电干扰,能够同时控制多个限位开关,保障了分闸或合闸动作一次到位,不会发生电源电流串到别的回路的现象。(The invention provides a direct control device and a control method for an isolating switch of a contact network, which are used for controlling the switching-off and switching-on operations of the isolating switch of the contact network, wherein the control device comprises a power device, a transmission device, a plurality of limit switches and limit switch pressing blocks; the limit switch pressing block is always in contact with the knife switch of each limit switch simultaneously; the power device drives the limit switch pressing block to rotate forward through the transmission device, and the limit switch pressing block presses all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches are closed simultaneously and the normally closed contacts are opened simultaneously; the power device drives the limit switch pressing blocks to rotate reversely through the transmission device, and the switch pressing blocks lift all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches are opened and the normally closed contacts are closed simultaneously. The scheme provided by the invention does not contain a relay and a contactor, is mechanically linked, is reliable in action, cannot be interfered by strong current of a contact network, can simultaneously control a plurality of limit switches, ensures that the switching-off or switching-on action is in place at one time, and cannot generate the phenomenon that power current is connected to other loops in series.)

1. A direct control device for an overhead line system isolating switch is used for controlling the switching-off and switching-on operations of the overhead line system isolating switch and is characterized by comprising a power device (1), a transmission device, a plurality of limit switches (6) and limit switch pressing blocks (8);

the limit switch pressing block (8) is always in contact with the knife switch of each limit switch (6) simultaneously;

the power device (1) drives the limit switch pressing blocks (8) to rotate in the forward direction through the transmission device, and the limit switch pressing blocks (8) simultaneously press all the disconnecting links so as to realize that the normally open contacts of the limit switches (6) are closed simultaneously and the normally closed contacts are opened simultaneously;

the power device (1) drives the limit switch pressing block (8) to rotate reversely through the transmission device, and the switch pressing block (8) lifts up all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches (6) are opened and the normally closed contacts are closed simultaneously.

2. The direct control device of the contact net isolating switch according to claim 1, characterized in that the limit switches (6) are arranged in parallel, the length of the limit switch pressing block (8) is matched with the total width of the limit switches (6), and all disconnecting links are pressed down or lifted up simultaneously; the limit switch (6) is linked with the plurality of contacts, the limit switch (6) is closed or opened, and other contacts simultaneously make corresponding actions.

3. The direct control device of the contact net isolating switch according to the claim 1, characterized in that the power device (1) comprises a motor and a speed reducer,

the motor is used for providing power;

the speed reducer is driven by the motor and has preset forward rotation and forward rotation limit angles;

the speed reducer passes through the operating axis subassembly and drives transmission drives limit switch briquetting (8) rotation, the operating axis subassembly include through the nut with speed reducer fixed connection's isolator operating axis (2), isolator operating axis (2) are kept away from nut fixed connection connecting lever (3) are passed through to the one end of speed reducer, connecting lever connecting pin (17) is connected in connecting lever (3), connecting lever connecting pin (17) are connected transmission.

4. The direct control device of the contact net isolating switch according to claim 3, characterized by further comprising a limit switch fixing frame (5), wherein the limit switch fixing frame (5) is U-shaped, and one side of the limit switch fixing frame (5) close to the power device (1) is connected with a base plate parallel to the side wall of the power device (1) and fixedly connected with the power device (1) through the base plate; limit switch (6) set up on limit switch mount (5) inner wall, limit switch briquetting (8) pass through fixed axle (10) with limit switch mount (5) are connected, be provided with on limit switch briquetting (8) and run through briquetting spacer pin (9) of limit switch briquetting (8), the one end of briquetting spacer pin (9) stretches into in the arc draw-in groove that limit switch mount (5) lateral wall was seted up, the other end with transmission connects.

5. The direct control device of the contact net isolating switch according to claim 4, the transmission device comprises a connecting plate (4), one end of the connecting plate (4) is provided with a clamping groove, the connecting pin (17) of the connecting lever penetrates through the clamping groove, and slides in the clamping groove, the other end of the connecting plate is connected with a transmission shifting block (7) through a connecting plate fixing pin (12), the connecting plate (4) and the transmission shifting block (7) relatively rotate by taking the connecting plate fixing pin (12) as a shaft, the transmission shifting block (7) is inserted on the fixed shaft (10), an arc-shaped clamping groove is arranged on the transmission shifting block (7), the arc-shaped clamping groove corresponds to the arc-shaped clamping groove arranged on the side wall of the limit switch fixing frame (5), the other end of the pressing block limiting pin (9) extends into an arc-shaped clamping groove formed in the transmission shifting block (7), the pressing block limiting pin (9) drives the limiting switch pressing block (8) to rotate along the arc-shaped clamping groove; still include spring (14), spring (14) cover is established on spring guide (13), the one end of spring guide (13) is passed through spring guide fixed pin (11) and is connected transmission shifting block (7), and with spring guide fixed pin (11) rotate for the axle, the other end and the spring rotor plate (15) of spring guide (13) are connected, be equipped with the through-hole on spring rotor plate (15), the other end of spring guide (13) stretches out the through-hole to stretch out or retract under the degree that does not deviate from the through-hole, the one end of spring (14) supports spring guide fixed pin (11), the other end supports spring rotor plate (15), spring rotor plate (15) are the U type, its two lateral walls all through step bolt (16) with the lateral wall fixed connection of limit switch mount (5).

6. A direct control method for an isolating switch of a contact net is characterized in that a motor provides power to drive a speed reducer to rotate, the speed reducer rotates forwards to drive a transmission device to press a limit switch pressing block (8) downwards and further press disconnecting links of all limit switches (6) simultaneously, and the speed reducer rotates backwards to drive the transmission device to lift the limit switch pressing block (8) and further lift the disconnecting links of all limit switches (6) simultaneously.

7. The direct control method for the disconnecting switch of the contact net according to claim 6, wherein the transmission device changes the direction of force through a plurality of connecting mechanisms and rotating shafts, and converts power provided by a motor into force for pressing down or lifting up the limit switch (6).

8. The direct control method of the contact net isolating switch as claimed in claim 6, wherein the transmission device comprises a spring mechanism, and the spring mechanism drives a limit switch pressing block (8) to rapidly act through compression energy storage and telescopic energy release.

Technical Field

The invention relates to the field of electrical switches, in particular to a direct control device and a control method for a contact net isolating switch.

Background

At present, electric isolating switches with remote control function are largely used on the contact network of the electric railway in China to change the operation mode of traction power supply or realize subsection power supply and subsection power failure under the fault state of traction power supply equipment so as to shorten the accident range and quickly repair.

The electric operating mechanism of the existing domestic isolating switch mostly adopts electric elements such as a contactor, a relay and the like to realize the forward and reverse rotation switching of the motor. The remote control terminal (RTU) sends an opening and closing command to trigger an opening and closing circuit command of the electric operating mechanism by narrow pulse, and the electric operating mechanism completes the opening and closing operation of the isolating switch. And the remote control terminal can receive the forceful electric power interference of contact net when actual work, therefore can send wrong instruction, cause contact net isolator's maloperation, refuse to move, mistake demonstration etc. for there is the potential safety hazard in the power supply system of electrified railway contact net, even causes the driving accident.

In order to overcome the strong current interference of the remote control of the contact net isolating switch, the Chinese national railway group limited company puts forward the requirements of an electric operating mechanism of the contact net electric isolating switch: firstly, the mechanism box contains elements such as a motor, a limit switch and an auxiliary contact, does not contain a relay and a contactor, directly loads DC220V voltage to the electric operating mechanism to drive the electric operating mechanism to enable the isolating switch to carry out switching-off and switching-on operations, and does not load voltage in a normal electric operating mechanism. When the switching-on operation is required, the current of a switching-on power supply cannot be connected to a switching-off loop in series; when the switching-off operation is carried out, the required current of the switching-off power supply cannot be connected to the switching-on loop in series.

In view of this, a direct control device for an overhead line system disconnecting switch and a control method thereof are provided, which are used for simultaneously controlling a plurality of limit switches, and meet the requirements of electric operating mechanisms of overhead line system electric disconnecting switches proposed by the national railway group limited company in china.

Disclosure of Invention

The invention aims to provide a direct control device and a control method for an overhead line system disconnecting switch, which are used for simultaneously controlling a plurality of limit switches and meeting the requirements of electric operating mechanisms of overhead line system electric disconnecting switches proposed by China national railway group limited company.

The technology adopted by the invention is as follows: a direct control device for an isolating switch of a contact network is used for controlling the switching-on and switching-off operations of the isolating switch of the contact network and comprises a power device, a transmission device, a plurality of limit switches and limit switch pressing blocks; the limit switch pressing block is always in contact with the knife switch of each limit switch simultaneously; the power device drives the limit switch pressing block to rotate forward through the transmission device, and the limit switch pressing block presses all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches are closed simultaneously and the normally closed contacts are opened simultaneously; the power device drives the limit switch pressing blocks to rotate reversely through the transmission device, and the switch pressing blocks lift all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches are opened and the normally closed contacts are closed simultaneously.

As further optimization of the scheme, the limit switches are arranged in parallel, the length of the limit switch pressing block is matched with the total width of the limit switches, and all the disconnecting links are pressed down or lifted up simultaneously; the limit switch is linked with the plurality of contacts, the limit switch is closed or opened, and other contacts simultaneously make corresponding actions.

As the further optimization of the scheme, the power device comprises a motor and a speed reducer, wherein the motor is used for providing power; the speed reducer is driven by a motor and has preset forward rotation and forward rotation limit angles; the speed reducer drives transmission through the operating shaft subassembly and drives the limit switch briquetting rotatory, and the operating shaft subassembly includes the isolator operating shaft through nut and speed reducer fixed connection, and the one end that the speed reducer was kept away from to the isolator operating shaft passes through nut fixed connection turning arm, and turning arm connecting pin is connected to the turning arm, and turning arm connecting pin connects transmission.

As a further optimization of the scheme, the power device further comprises a limit switch fixing frame which is U-shaped, and one side of the limit switch fixing frame, which is close to the power device, is connected with a base plate parallel to the side wall of the power device and fixedly connected with the power device through the base plate; the limit switch is arranged on the inner wall of the limit switch fixing frame, the limit switch pressing block is connected with the limit switch fixing frame through the fixing shaft, a pressing block limiting pin penetrating through the limit switch pressing block is arranged on the limit switch pressing block, one end of the pressing block limiting pin extends into an arc-shaped clamping groove formed in the side wall of the limit switch fixing frame, and the other end of the pressing block limiting pin is connected with the transmission device.

As a further optimization of the scheme, the transmission device comprises a connecting plate, one end of the connecting plate is provided with a clamping groove, a connecting pin of a crank arm penetrates through the clamping groove and slides in the clamping groove, the other end of the connecting plate is connected with a transmission shifting block through a fixing pin of the connecting plate, the connecting plate and the transmission shifting block relatively rotate by taking the fixing pin of the connecting plate as an axis, the transmission shifting block is inserted on a fixed shaft, the transmission shifting block is provided with an arc-shaped clamping groove, the arc-shaped clamping groove corresponds to an arc-shaped clamping groove formed in the side wall of a limit switch fixing frame, the other end of a pressure block limiting pin extends into the arc-shaped clamping groove formed in the transmission shifting block, the pressure block limiting pin drives the limit switch, one end of a spring guide rod is connected with the transmission shifting block through a spring guide rod fixing pin and rotates by taking the spring guide rod fixing pin as an axis, the other end of the spring guide rod, one end of the spring is abutted against the spring guide rod fixing pin, the other end of the spring is abutted against the spring rotating plate, the spring rotating plate is U-shaped, and the two side walls of the spring rotating plate are fixedly connected with the side wall of the limit switch fixing frame through step bolts.

A direct control method for an isolating switch of a contact net is characterized in that a motor provides power to drive a speed reducer to rotate, the speed reducer rotates forwards to drive a transmission device to press a limit switch pressing block, then knife switches of all limit switches are pressed simultaneously, the speed reducer rotates backwards to drive the transmission device to lift the limit switch pressing block, and then the knife switches of all limit switches are lifted simultaneously.

As a further optimization of the scheme, the transmission device changes the direction of the force through a plurality of connecting mechanisms and rotating shafts, and converts the power provided by the motor into the force for pressing down or lifting the limit switch.

As further optimization of the scheme, the transmission device further comprises a spring mechanism, and the spring mechanism drives the limit switch pressing block to rapidly act through compression energy storage and telescopic energy release.

Compared with the prior art, the invention has the beneficial effects that:

1. the device does not contain a relay or a contactor, and the power device is directly loaded with DC220V voltage to drive the power device to drive the transmission device to control the limit switch pressing block to press down, or the limit switch is lifted to carry out the operation of switching on and switching off;

2. the device is mechanically linked, the action is reliable, and the device cannot be interfered by strong electricity of a contact network, so that an error instruction can be sent, and misoperation, refusal operation, error display and the like of a contact network isolating switch can be caused;

3. the multiple limit switches are controlled simultaneously, so that switching-off is guaranteed, or switching-on action is in place once, and switching-on power supply current is in series connection to a switching-off loop when switching-on operation is not performed; when the switching-off operation is carried out, the switching-off power supply current is connected in series to the switching-on loop.

Drawings

Fig. 1 is a structural diagram of a direct control device of a contact net isolating switch provided by the invention;

fig. 2 is a structural diagram of another angle of a direct control device of a contact net disconnecting switch provided by the invention;

fig. 3 is a structural diagram of a transmission device of a contact net isolating switch direct control device provided by the invention;

fig. 4 is another angle structure diagram of the transmission device of the direct control device of the contact net disconnecting switch provided by the invention;

FIG. 5 is a side view of a limit switch pressing block of the direct control device of the contact net isolating switch provided by the invention;

fig. 6 is a schematic diagram of an opening position of an isolating switch of the direct control device of the isolating switch of the overhead line system provided by the invention;

fig. 7 is a schematic diagram of an isolator switching-on position of the direct control device for the isolator of the overhead line system provided by the invention;

fig. 8 is a schematic diagram i of an action process of a direct control device of an overhead line system disconnecting switch provided by the invention;

fig. 9 is a schematic view of an action process of the direct control device of the contact network disconnecting switch provided by the invention;

fig. 10 is a schematic diagram third of an action process of the direct control device of the contact network disconnecting switch provided by the invention;

fig. 11 is a fourth schematic view of an operation process of the direct control device of the contact net disconnecting switch provided by the invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

Referring to fig. 6-7, for the control electrical principle of the contact network disconnecting switch, when the limit switch SP1 and the limit switch SP2 are opened, the contact a and the contact c are opened, the contact b and the contact d are closed, and are in an opening position, and a closing condition is met; when the limit switch SP1 and the limit switch SP2 are closed, the contact a and the contact c are closed, the contact b and the contact d are opened, and the switch-on position is achieved, so that the switch-off condition is achieved. If the switching-off and switching-on actions are required to be in place once, and the power supply current cannot be connected to other loops, the limit switch SP1 and the limit switch SP2 are required to act simultaneously. If the limit switch SP2 is firstly actuated in the operation of the closing command, the positive pole of the motor power supply is cut off, the motor stops rotating, the limit switch SP1 cannot actuate, and the isolating switch is not closed in place. If the command of closing operation is continued, the contact d of the limit switch SP2 is not passed, and the command cannot be completed; if the command for opening operation is given, the contact a of the limit switch SP1 is not passed, and the command cannot be completed. Therefore, maintenance personnel are required to arrive at the site for maintenance, and the running of the railway is delayed. Therefore, the key to the operation of the control mechanism is to ensure that the limit switches SP1 and SP2 of the positive and negative power supplies for turning off and on the power supply of the DC motor synchronously operate.

Referring to fig. 1-5, a direct control device for an isolating switch of a contact network is used for controlling the switching-off and switching-on operations of the isolating switch of the contact network, and comprises a power device 1, a transmission device, a plurality of limit switches 6 and a limit switch pressing block 8; the limit switch pressing block 8 is always in contact with the knife switch of each limit switch 6 simultaneously; the power device 1 drives the limit switch pressing block 8 to rotate in the forward direction through the transmission device, and the limit switch pressing block 8 presses all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches 6 are closed simultaneously and the normally closed contacts are opened simultaneously; the power device 1 drives the limit switch pressing block 8 to rotate reversely through the transmission device, and the switch pressing block 8 lifts up all the disconnecting links simultaneously so as to realize that the normally open contacts of the limit switches 6 are opened and the normally closed contacts are closed simultaneously. The limit switches 6 are arranged in parallel, the length of the limit switch pressing block 8 is matched with the total width of the limit switches 6, and all the disconnecting links are pressed down or lifted up simultaneously. The limit switch 6 is linked with a plurality of contacts, the limit switch 6 is closed or opened, and other contacts simultaneously make corresponding actions. The power device 1 comprises a motor and a speed reducer, wherein the motor is used for providing power; the speed reducer is driven by a motor and has preset forward rotation and forward rotation limit angles; the speed reducer drives the transmission device through the operating shaft assembly to drive the limit switch pressing block 8 to rotate in the forward direction, the speed reducer rotates to a limit angle, and the transmission device drives the limit switch pressing block 8 to press all the disconnecting links simultaneously; the speed reducer rotates reversely to a limit angle, and the transmission device drives the limit switch pressing block 8 to lift all the disconnecting links simultaneously.

In order to meet the requirements that an electric operating mechanism box of an electric isolating switch of a contact net, which is proposed by the national railway group company limited in China, contains elements such as a motor, a limit switch and an auxiliary contact and does not contain a relay and a contactor, the direct control device of the contact net isolating switch, which is provided by the invention, provides power through the motor of the power device 1 to drive the speed reducer to rotate, the speed reducer controls the limit switch pressing block 8 through a mechanical transmission device, the limit switch pressing block 8 can press down the limit switch 6 through forward rotation, and the limit switch 6 can be lifted through reverse rotation. Because the limit switches 6 are arranged in parallel, and the width of the limit switch pressing block 8 is greater than the total width of all the limit switches 6 arranged in parallel, when the limit switch pressing block 8 acts, the limit switches can be pressed down simultaneously, or all the limit switches 6 are lifted, closing is guaranteed, or opening action is in place at one time, and the power supply current cannot be connected to other loops in series.

The limit switch pressing block 8 is in a sharp-nose shape, the limit switch 6 abuts against a sharp-nose-shaped lower groove of the limit switch pressing block 8, the limit switch pressing block 8 rotates anticlockwise, the limit switch 6 is pressed downwards until the limit switch pressing block crosses the sharp-nose-shaped convex point of the limit switch pressing block 8 and is clamped into the upper groove, and the limit switch 6 is pressed in place; the limit switch pressing block 8 rotates clockwise, the limit switch 6 is lifted downwards until the limit switch pressing block crosses the sharp-mouth-shaped salient point of the limit switch pressing block 8 and is clamped into the lower groove, and the limit switch 6 is lifted in place. The action wheel of the limit switch 6 is clamped in the groove of the pressing block 8, and has a self-locking function. The self-locking function refers to the action of the transmission device, and in the process of compressing the spring 14, the limit pressing block 8 does not act and keeps the state of the limit switch 6. Only when the spring 14 exceeds the dead point and releases energy, the force of the spring 14 can drive the transmission shifting block 7 to drive the limit pressing block 8 to rotate, and the state of the limit switch 6 is changed.

Referring to fig. 1-11, the operating shaft assembly comprises an isolating switch operating shaft 2 fixedly connected with a speed reducer through a nut, one end, far away from the speed reducer, of the isolating switch operating shaft 2 is fixedly connected with a crank arm 3 through the nut, the crank arm 3 is connected with a crank arm connecting pin 17, and the crank arm connecting pin 17 is connected with a transmission device.

The power device is characterized by further comprising a limit switch fixing frame 5, wherein the limit switch fixing frame 5 is U-shaped, one side, close to the power device 1, of the limit switch fixing frame 5 is connected with a base plate parallel to the side wall of the power device 1, and the limit switch fixing frame is fixedly connected with the power device 1 through the base plate. The limit switch 6 is arranged on the inner wall of the limit switch fixing frame 5, the limit switch pressing block 8 is connected with the limit switch fixing frame 5 through a fixing shaft 10, a pressing block limiting pin 9 penetrating through the limit switch pressing block 8 is arranged on the limit switch pressing block 8, one end of the pressing block limiting pin 9 extends into an arc-shaped clamping groove formed in the side wall of the limit switch fixing frame 5, and the other end of the pressing block limiting pin is connected with the transmission device.

The transmission device comprises a connecting plate 4, a clamping groove is formed in one end of the connecting plate 4, a connecting lever connecting pin 17 penetrates through the clamping groove and slides in the clamping groove, the other end of the connecting plate is connected with a transmission shifting block 7 through a connecting plate fixing pin 12, the connecting plate 4 and the transmission shifting block 7 rotate relative to each other by taking the connecting plate fixing pin 12 as a shaft, the transmission shifting block 7 is inserted on a fixing shaft 10, an arc-shaped clamping groove is formed in the transmission shifting block 7 and corresponds to the arc-shaped clamping groove formed in the side wall of the limit switch fixing frame 5, the other end of a pressing block limiting pin 9 extends into the arc-shaped clamping groove formed in the transmission shifting block 7, and the pressing block limiting pin 9 drives a limit switch.

The transmission device further comprises a spring 14, the spring 14 is sleeved on a spring guide rod 13, one end of the spring guide rod 13 is connected with the transmission shifting block 7 through a spring guide rod fixing pin 11 and rotates by taking the spring guide rod fixing pin 11 as a shaft, the other end of the spring guide rod 13 is connected with a spring rotating plate 15, a through hole is formed in the spring rotating plate 15, the other end of the spring guide rod 13 extends out of the through hole and extends out or retracts into the through hole in a degree that the spring guide rod fixing pin 11 does not depart from the through hole, the other end of the spring 14 supports against the spring rotating plate 15, the spring rotating plate 15 is U-shaped, and two side walls of the spring rotating plate are fixedly connected with the side wall of the limit.

A direct control method for an isolating switch of a contact net is characterized in that a motor provides power to drive a speed reducer to rotate, the speed reducer rotates forwards to drive a transmission device to press a limit switch pressing block 8, then knife switches of all limit switches 6 are pressed down simultaneously, the speed reducer rotates backwards to drive the transmission device to lift the limit switch pressing block 8, and then the knife switches of all limit switches 6 are lifted simultaneously. The transmission device changes the direction of force through a plurality of connecting mechanisms and rotating shafts, and converts the power provided by the motor into the force for pressing down or lifting the limit switch 6. The transmission device also comprises a spring mechanism which drives the limit switch pressing block 8 to rapidly act through compression energy storage and telescopic energy release.

The action process is as follows:

when the device is in a brake-separating state, closing operation is carried out, the device is located at the position shown in fig. 6, the speed reducer rotates anticlockwise, the connecting lever 3 is fixedly connected with the disconnecting switch operation 2 and rotates anticlockwise, a connecting lever connecting pin 17 arranged on the connecting lever 3 is fixedly connected with the connecting lever 3, the other end of the connecting lever 3 can slide in a clamping groove formed in the connecting plate 4, and the other end of the connecting plate 4 is also in rotating connection, so that the connecting lever connecting pin 17 rotates anticlockwise, when the connecting lever 3 slides towards the transmission device in the clamping groove of the connecting plate 4 and does not reach the top end of the clamping groove, the connecting plate 4 rotates by taking the connecting plate fixing pin 12 as a shaft, one end connected with the connecting lever connecting pin 17 is lifted, the transmission shifting block 7 does not rotate, and the state; the speed reducer rotates anticlockwise continuously, the connecting pin 17 of the crank arm abuts against one end, close to the transmission device, of the clamping groove of the connecting plate 4 to push the connecting plate 4 to move continuously, at the moment, the transmission shifting block 7 rotates anticlockwise by taking the fixed shaft 10 as an axis, the pressing block limiting pin 9 moves clockwise relatively in the arc-shaped clamping grooves in the limiting switch fixing frame 5 and the transmission shifting block 7, in the process, one salient point of the transmission shifting block 7 is connected with the connecting plate 4, the other salient point is connected with the spring guide rod 13 through the spring guide rod fixing pin 11, the spring guide rod 13 and the transmission shifting block 7 can rotate relatively by taking the spring guide rod fixing pin 11 as an axis, the included angle between the two salient points and the fixed shaft is larger than 120 degrees, the connecting rod 4 drives the transmission shifting block 7 to rotate anticlockwise, the other salient point also rotates anticlockwise to cross a central axis in the vertical direction, the spring 14 is compressed, the spring guide rod 13 extends outwards along the through hole until the spring 14 is compressed to a dead point, the energy storage of the spring 14 is completed, at the moment, the spring guide rod 13 and the transmission shifting block 7 are connected with the salient point of the spring guide rod 13 on the same straight line, the pressing block limiting pin 9 does not reach the top end of the arc-shaped clamping groove in the clockwise direction, the speed reducer continues to rotate anticlockwise, the salient point of the transmission shifting block 7 connected with the spring guide rod 13 is lifted up to form an angle with the spring guide rod 13, the spring 14 releases energy to extend, the transmission shifting block 7 is pushed anticlockwise, at the moment, the speed reducer reaches the limit of the rotation angle and stops not rotating any more, the connecting plate 4 is driven by the transmission shifting block 7 to continue to move towards the transmission device. When the pressing block limiting pin 9 reaches the top end of the arc-shaped clamping groove in the clockwise direction, the transmission shifting block 7 drives the pressing block limiting pin 9 to rotate together, the pressing block limiting pin 9 drives the limiting switch pressing block 8 to rotate, the sharp-mouth-shaped convex point of the limiting switch pressing block 8 presses the disconnecting link of the limiting switch 6 downwards until the disconnecting link crosses the convex point to reach the upper groove of the limiting switch pressing block 8, the state shown in the figure 9 is reached, and the limiting switch pressing block 8 presses all the limiting switches 6.

And when the switching-on state is achieved, switching-off operation is carried out, and the action process is opposite to the switching-on operation. The speed reducer rotates clockwise, the isolating switch operating shaft 2 drives the crank arm 3 to rotate clockwise, the crank arm connecting pin 17 rotates clockwise, when the connecting plate 4 slides in the direction far away from the transmission device and does not reach the top end of the clamping groove, the connecting plate 4 rotates by taking the connecting plate fixing pin 12 as a shaft, one end connected with the crank arm connecting pin 17 is lifted, and the transmission shifting block 7 does not rotate; the speed reducer continues to rotate clockwise, the connecting pin 17 of the crank arm abuts against one end, far away from the transmission device, of the clamping groove of the connecting plate 4, the connecting plate 4 is pulled to continue to move, at the moment, the transmission shifting block 7 rotates clockwise by taking the fixed shaft 10 as a shaft, the pressing block limiting pin 9 moves anticlockwise relatively in the arc-shaped clamping groove on the limit switch fixing frame 5 and the transmission shifting block 7, the spring guide rod 13 and the transmission shifting block 7 rotate relatively by taking the spring guide rod fixing pin 11 as a shaft, the salient point, connected with the spring guide rod 13, of the transmission shifting block 7 rotates clockwise, the spring 14 is pressed downwards, the spring 14 is compressed, the spring guide rod 13 extends outwards along the through hole until the spring 14 is compressed to a dead point, the energy storage of the spring 14 is completed, at the moment, the salient point, connected with the spring guide rod 13 and the transmission shifting block 7, of the spring guide rod 13, the transmission shifting block 7 is connected with the salient point of the spring guide rod 13 and pressed downwards to form an angle with the spring guide rod 13, the spring 14 releases energy to extend, the transmission shifting block 7 is pushed clockwise, the speed reducer reaches the limit of the rotation angle and stops rotating no longer, the connecting plate 4 is driven by the transmission shifting block 7 to continue moving in the direction far away from the transmission device, and the connecting pin 17 of the crank arm no longer supports against the top end of the clamping groove of the connecting plate 4. When the pressing block limiting pin 9 reaches the top end of the arc-shaped clamping groove in the clockwise direction, the transmission shifting block 7 drives the pressing block limiting pin 9 to rotate together, the pressing block limiting pin 9 drives the limiting switch pressing block 8 to rotate, the sharp-mouth-shaped convex point of the limiting switch pressing block 8 upwards lifts the disconnecting link of the limiting switch 6 to the disconnecting link, the convex point is crossed by the disconnecting link to reach the lower groove of the limiting switch pressing block 8, and the limiting switch pressing block 8 lifts all the limiting switches 6.

The spring 14 releases energy to drive the limit switch pressing block 8 to press down or lift the knife switch of the limit switch 6, the action is rapid, the knife switch can be guaranteed to cross the convex point of the limit switch pressing block 8, and all the limit switches 6 can act in place.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.