CN118588492A - An outdoor high voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch - Google Patents

Abstract

The present invention discloses an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with built-in isolation knife switch, comprising a box, a sealed pole, a magnetic control mechanism and an isolation knife switch mechanism; the sealed pole comprises a pole body, a vacuum arc extinguishing chamber and a flexible busbar; the magnetic control mechanism is arranged in the box, and the magnetic control mechanism is used to control the closing and opening of the vacuum arc extinguishing chamber; the isolation knife switch mechanism comprises an isolation knife switch assembly and an operating mechanism; the isolation knife switch assembly is arranged inside the pole body, and comprises an isolation static contact, a moving knife base and a moving knife assembly; the operating mechanism is used to drive the moving knife assembly to contact or separate with the isolation static contact. The vacuum circuit breaker realizes the closing and opening of the vacuum arc extinguishing chamber by directly driving the vacuum arc extinguishing chamber up and down through the magnetic control mechanism, and the structure is simpler, and there is no need to add a transmission structure, thereby reducing the risk of failure; the isolation knife switch assembly adopts a built-in installation method, which plays a good protective role on the isolation knife switch assembly and ensures smooth opening and closing of the isolation knife switch assembly.

Description

An outdoor high voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch

Technical Field

The invention relates to the technical field of switches on overhead lines of distribution networks, and in particular to an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch.

Background Art

Vacuum circuit breakers are power distribution devices in three-phase AC systems. They can be used in industrial and mining enterprises, power plants, and substations to protect and control electrical equipment. They are particularly suitable for use in places that require oil-free operation, less maintenance, and frequent operation. Circuit breakers can be configured in central cabinets, double-layer cabinets, and fixed cabinets to control and protect high-voltage electrical equipment. At present, outdoor high-voltage AC vacuum circuit breakers have the following main shortcomings:

1. The mechanisms used in outdoor high-voltage AC vacuum circuit breakers are mostly spring mechanisms. The horizontal left and right movement of the spring mechanism drives the vertical up and down movement of the vacuum interrupter to achieve the closing and opening of the vacuum interrupter. Since the spring mechanism has a large number of parts, the mechanism debugging is more troublesome. And the up and down movement of the vacuum interrupter is driven by the left and right movement of the spring mechanism. Therefore, it is necessary to add a transmission structure between the spring mechanism and the vacuum interrupter, which will increase the risk of transmission failure in subsequent use.

2. The isolating switches configured for outdoor high-voltage AC vacuum circuit breakers are all open-type. The structure of the open isolating switches is exposed to the outside. The contacts of the isolating switches are oxidized, rusted, and adhered due to factors such as dirt, causing the circuit resistance to increase, resulting in the isolating switches opening and closing actions not being smooth.

Summary of the invention

The purpose of the present invention is to overcome the above-mentioned problems and provide an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation knife switch. The vacuum circuit breaker adopts a magnetic control mechanism instead of the spring mechanism in the prior art. The magnetic control mechanism directly drives the up and down movement of the vacuum arc chamber to realize the closing and opening of the vacuum arc chamber. The structure is simpler, and there is no need to increase the transmission structure, thereby reducing the risk of failure. In addition, the isolation knife switch assembly adopts a built-in installation method, which has a good protective effect on the isolation knife switch assembly and ensures smooth closing and opening of the isolation knife switch assembly.

The purpose of the present invention is achieved through the following technical solutions:

An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch comprises a box, a sealed pole, a magnetic control mechanism and an isolating knife switch mechanism; wherein:

The sealed pole comprises a pole body arranged outside the box, a vacuum interrupter arranged inside the pole body, and a flexible busbar; the pole body is provided with an incoming wiring terminal and an outgoing wiring terminal; the static end of the vacuum interrupter passes through a pole reserved hole arranged on the pole body and is connected to the incoming wiring terminal; the magnetic control mechanism is arranged in the box, the moving end of the vacuum interrupter is connected to the magnetic control mechanism, and the magnetic control mechanism is used to control the closing and opening of the vacuum interrupter;

The isolating knife switch mechanism includes an isolating knife switch assembly and an operating mechanism; the isolating knife switch assembly is arranged inside the pole body, and the isolating knife switch assembly includes an isolating static contact, a moving knife base and a moving knife assembly; the isolating static contact is connected to the outgoing line terminal; the moving knife base is connected to the moving knife assembly; one end of the soft busbar is connected to the moving end of the vacuum arc extinguishing chamber, and the other end of the soft busbar is connected to the moving knife base; the operating mechanism is used to drive the moving knife assembly to move inside the pole body, so that the moving knife assembly contacts or separates from the isolating static contact.

The working principle of the above-mentioned outdoor high-voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch is:

The magnetic control mechanism drives the moving end of the vacuum interrupter to move up and down by moving up and down, realizing the closing and opening of the vacuum interrupter, avoiding the abnormal problems such as jamming in the closing and opening process caused by the multi-stage transmission of the spring mechanism in the prior art; by operating the operating mechanism, the operating mechanism will drive the moving knife assembly to move up and down, complete the contact and separation of the moving knife assembly and the isolation static contact, thereby realizing the closing and opening actions. The isolation static contact, moving knife base and moving knife assembly of the isolation knife switch mechanism are arranged inside the pole body, which plays an isolating role from the outside world, avoiding oxidation, rusting and adhesion of the isolation static contact, moving knife base and moving knife assembly due to the influence of dirt, and ensuring the smooth opening and closing actions of the isolation knife switch mechanism.

A preferred embodiment of the present invention, wherein the sealed pole also includes a connecting rod, an insulating pull rod and an adjusting rod arranged inside the pole body; the upper end of the connecting rod is connected to the moving end of the vacuum arc extinguishing chamber, the lower end of the connecting rod is connected to the upper end of the insulating pull rod, the lower end of the insulating pull rod is connected to the upper end of the adjusting rod, and the lower end of the adjusting rod is connected to the magnetron mechanism. In the above structure, the insulating pull rod mainly plays an insulating role, and the isolating static contact is connected to the outgoing terminal through a conductive rod. During installation, first, one end of the soft busbar is threadedly connected and fixed to the moving end (lower end) of the vacuum interrupter through a connecting rod, the lower end of the connecting rod is threadedly connected to the insulating pull rod, and the lower end of the insulating pull rod is threadedly fixed to the adjusting rod, and then the entire assembled vacuum interrupter is installed in the pole body, the static end (upper end) of the vacuum interrupter passes through the reserved hole of the pole, and then is locked and fixed with a nut before installing the incoming terminal, the other end of the soft busbar is connected to the moving knife base, and then the conductive rod is installed, the conductive rod passes through the pole body and is connected to the isolating static contact, the outgoing terminal is installed on the conductive rod, and then the moving knife assembly is installed to complete the assembly of the sealed pole.

Preferably, the magnetic control mechanism includes a mounting frame arranged on the box body, a static iron core and a moving iron core arranged on the mounting frame, a trip spring and an overtravel spring arranged between the static iron core and the moving iron core; the moving iron core is installed below the static iron core, the overtravel spring is located inside the trip spring, and the lower end of the adjusting rod passes through the static iron core and the moving iron core in sequence; one end of the trip spring acts on the static iron core, the other end of the trip spring acts on the moving iron core, and the overtravel spring acts between the moving iron core and the adjusting rod. The magnetic control mechanism is adopted, with a small number of parts, which greatly reduces the failure rate in later use and does not require a transmission mechanism. The magnetic control mechanism is controlled by a controller. When working, a closing command is given to the controller through the controller. The controller passes a certain current to the coil in the static iron core. After the coil is energized, a magnetic field is generated. The generated magnetic field is in the same direction as the magnet in the static iron core. The upper end of the moving iron core generates an upward suction force and weakens the permanent magnet magnetic field under the moving iron core. When the upward force is greater than the downward force, the moving iron core overcomes the elastic force of the opening spring and the overtravel spring under the action of the magnetic force and is attracted to the static iron core. The moving iron core moves upward while driving the adjustment rod to move, and the insulating pull rod and the connecting rod also move upward, thereby driving the moving end of the vacuum arc extinguishing chamber to move upward, so that the vacuum arc extinguishing chamber can be effectively closed. The empty arc extinguishing chamber is closed; an opening command is given to the controller, and the controller passes a current opposite to the closing current and with a smaller value through the coil in the static iron core. After the coil is energized, a magnetic field is generated, and the generated magnetic field is opposite to the direction of the magnet in the static iron core. When the suction force generated by the synthetic magnetic field at the upper end of the moving iron core is less than the combined force of the overtravel spring and the opening spring, the moving iron core moves downward under the elastic force, and the downward movement of the moving iron core drives the adjustment rod to move at the same time, and the insulating pull rod and the connecting rod also move downward, thereby driving the moving end of the vacuum arc extinguishing chamber to move downward, so that the vacuum arc extinguishing chamber is opened; the vacuum arc extinguishing chamber is driven to move by the vertical movement of the magnetic control mechanism, and the transmission components between the two are reduced, which greatly reduces the transmission failure rate, and the magnetic control mechanism is simple to install and convenient for later replacement and maintenance.

Furthermore, the mounting frame includes a mounting plate, a support rod and a limit plate, the mounting plate is arranged on the top of the box, the support rod is connected between the mounting plate and the limit plate, the static iron core is mounted on the mounting plate, and the moving iron core is slidably connected to the limit plate through a guide pin. The support rod fixes the mounting plate and the limit plate; by setting the guide pin, it is ensured that the magnetic control mechanism will not produce a large displacement during the process of controlling the opening and closing of the switch, one end of the guide pin is connected to the moving iron core, and the other end passes through the limit plate.

Preferably, the upper end of the adjusting rod is connected to the lower end of the insulating pull rod by threads, the lower end of the moving iron core is provided with a fixing plate, the lower end of the adjusting rod passes through the fixing plate, and the lower end of the adjusting rod is provided with a flange hexagonal nut. When installing the above structure, the magnetron mechanism and the box body are fixed with bolts and nuts. Since the upper end of the adjusting rod is connected to the lower end of the insulating pull rod by threads, the distance between the upper end face of the adjusting rod and the top of the box body can be changed. The adjustment of this distance is mainly to ensure that the elastic force provided by the compression of the overtravel spring inside the magnetron mechanism matches the contact pressure of the vacuum interrupter when the magnetron mechanism is in the closed state; when installing the flange hexagonal nut, ensure the distance between the upper end face of the flange hexagonal nut and the lower end face of the fixing plate, because the overtravel spring is placed inside the magnetron mechanism, changing this distance can change the overtravel. Since the total movement stroke of the magnetron mechanism remains unchanged, the opening distance of the vacuum interrupter is changed while changing the overtravel.

Preferably, a circuit breaker synchronization shaft is rotatably provided on the box body, a transmission assembly is provided between the circuit breaker synchronization shaft and the fixed plate, the transmission assembly includes a connecting plate provided on the fixed plate and a synchronization shaft connecting rod provided on the circuit breaker synchronization shaft, and the synchronization shaft connecting rod is hinged to the connecting plate through a pin shaft. The outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation knife switch in the present invention is a three-phase circuit breaker, and the three sealed poles are provided, and the corresponding magnetic control mechanisms and isolation knife switch assemblies are three. By providing a circuit breaker synchronization shaft, it can be ensured that the three magnetic control mechanisms can move synchronously, which can reduce the time of opening and closing of the three-phase circuit breaker.

Furthermore, bearings are installed at both ends of the circuit breaker synchronization shaft, and the bearings are connected to the box body through a mounting sleeve and a mounting sleeve fixing plate.

Preferably, a first micro switch is provided on the housing, and a micro switch pressing block for triggering the first micro switch is provided on the synchronous shaft of the circuit breaker, and the synchronous shaft of the circuit breaker rotates clockwise or counterclockwise, driving the micro switch pressing block to rotate clockwise or counterclockwise, so that the micro switch pressing block presses or does not press the first micro switch, thereby causing the first micro switch to output a dry contact signal and provide a switch-on and switch-off position signal to the controller. For example, when the magnetic control mechanism drives the vacuum interrupter to close, the synchronous shaft of the circuit breaker rotates, driving the micro switch pressing block to rotate as well, the micro switch pressing block presses the first micro switch, the first micro switch is triggered, and a dry contact signal is output to provide a switch-on position signal to the controller; when the magnetic control mechanism drives the vacuum interrupter to open, the synchronous shaft of the circuit breaker rotates in the opposite direction, driving the micro switch pressing block to rotate as well, the micro switch pressing block is separated from the first micro switch, that is, the micro switch pressing block does not press the first micro switch, the first micro switch is not triggered, and a dry contact signal is output to provide a switch-off position signal to the controller.

Furthermore, the first micro switch is arranged on the mounting sleeve fixing plate.

Preferably, it also includes an opening and closing indicating device, which includes a first opening and closing mark arranged on the outside of the box body, a rotating shaft rotatably arranged on the box body, a first pointer arranged at the outer end of the rotating shaft for indicating the first opening and closing mark, a fork arranged at the inner end of the rotating shaft, a long connecting rod arranged on the circuit breaker synchronization shaft, and a transmission rod arranged between the fork and the long connecting rod; an open groove is provided at the end of the fork; one end of the transmission rod is fixedly connected to the long connecting rod, and the other end of the transmission rod extends into the open groove. In the above structure, by setting the opening and closing indicating device, it is convenient for the operator to know the opening and closing status of the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch. The first pointer is located on the outside of the box body, and the fork is located on the inside of the box body. The magnetic control mechanism drives the adjusting rod to move up and down to realize the closing and opening of the vacuum arc extinguishing chamber. The fixed plate will move up and down with the moving iron core. Under the action of the transmission assembly, the circuit breaker synchronous shaft will be driven to rotate forward or reverse, thereby driving the long connecting rod to rotate, and then driving the transmission rod to rotate around the circuit breaker synchronous shaft. The transmission rod will push the fork upward or downward to drive the rotating shaft to rotate, so that the first pointer indicates the closing position or the opening position in the first opening and closing mark.

Preferably, it also includes an opening and closing device arranged on the box body for controlling the magnetic control mechanism to perform opening and closing, and the opening and closing device includes an opening and closing operating handle, a mounting shaft, an opening and closing shaft plate, a reset spring and a second micro switch; the mounting shaft is rotatably arranged on the box body, the opening and closing operating handle is fixed to the outer end of the mounting shaft, the opening and closing shaft plate is fixed to the inner end of the mounting shaft, and the opening and closing shaft plate is provided with a plurality of round pins for triggering the second micro switch, and two second micro switches are provided, and the two second micro switches are symmetrically distributed, and the second micro switch is connected to the controller; one end of the reset spring acts on the box body, and the other end of the reset spring acts on the opening and closing shaft plate. The working principle of the above structure is: the staff pulls down the left side of the opening and closing operating handle and overcomes the elastic force of the reset spring, driving the installation shaft and the opening and closing shaft plate to rotate counterclockwise, and the round pins also rotate together, and one of the round pins will press the second microswitch on the left side, and the second microswitch on the left side will change from a normally open point to a normally closed point, providing an opening control signal for the controller, and the controller controls the magnetic control mechanism to work, so that the vacuum interrupter is opened, thereby completing the opening action; release the opening and closing operating handle, the reset spring is reset, which will drive the opening and closing shaft plate and the opening and closing operating handle to return to normal operation. The handle is reset; similarly, the staff pulls down the right side of the opening and closing operating handle and overcomes the elastic force of the reset spring, driving the installation shaft and the opening and closing shaft plate to rotate clockwise, and the round pin also rotates together, and the other round pin will press the second microswitch on the right side. The second microswitch on the right side changes from a normally open point to a normally closed point, providing a closing control signal for the controller. The controller controls the magnetic control mechanism to close the vacuum arc chamber, thereby completing the closing action; release the opening and closing operating handle, the reset spring resets, and the opening and closing shaft plate and the opening and closing operating handle are reset.

Preferably, the movable knife assembly includes a movable knife and a movable knife guide, the upper end of the movable knife passes through the movable knife base, and the lower end of the movable knife is connected to the upper end of the movable knife guide; the movable knife guide is vertically slidably arranged inside the pole body; the operating mechanism includes an isolating knife switch synchronization shaft, an isolating knife switch connecting rod, a long crank arm and an isolation operating handle; the isolating knife switch synchronization shaft is rotatably arranged on the box body, and the isolation operating handle is arranged outside the box body and connected to the isolating knife switch synchronization shaft; one end of the isolating knife switch connecting rod is hinged to the lower end of the movable knife guide, the other end of the isolating knife switch connecting rod is hinged to one end of the long crank arm, and the other end of the long crank arm is fixedly connected to the isolating knife switch synchronization shaft. In the above structure, the isolation knife switch mechanism adopts a plug-in structure. The staff pulls down the left side of the isolation operating handle to drive the isolation knife switch synchronization shaft to rotate, drive the long crank arm to rotate, and then drive the isolation knife switch connecting rod to move, thereby driving the moving knife guide to move downward, so that the moving knife moves downward, and the upper end of the moving knife is separated from the isolation static contact, thereby realizing the opening of the isolation knife switch mechanism; similarly, the staff pulls down the right side of the isolation operating handle to drive the isolation knife switch synchronization shaft to rotate in the opposite direction, drive the long crank arm to rotate in the opposite direction, and then drive the isolation knife switch connecting rod to move, thereby driving the moving knife guide to move upward, so that the moving knife moves upward, and the upper end of the moving knife contacts with the isolation static contact, thereby realizing the closing of the isolation knife switch mechanism; correspondingly, there are three isolation knife switch connecting rods and long crank arms, and the isolation knife switch synchronization shaft can realize the synchronous movement of the three moving knife components, thereby realizing synchronous closing and opening.

Furthermore, a second opening and closing mark is provided on the box body, and a second pointer for indicating the second opening and closing mark is provided on the isolating knife switch synchronization shaft. When the isolating operating handle is pulled to realize the opening of the isolating knife switch mechanism, the second pointer moves with the isolating knife switch synchronization shaft, and the second pointer points to the opening position of the second opening and closing mark; when the isolating operating handle is pulled to realize the closing of the isolating knife switch mechanism, the second pointer moves with the isolating knife switch synchronization shaft, and the second pointer points to the closing position of the second opening and closing mark. By setting the above structure, it is convenient to identify the closing and opening of the switch.

Furthermore, the isolating static contact and the moving knife base are sealed in a fixed position during the epoxy pouring process of the pole body, and spring contact fingers are installed inside the isolating static contact and the moving knife base. The spring contact fingers are used to increase the contact pressure between the isolating static contact, the moving knife base and the moving knife, thereby ensuring good contact between the isolating static contact, the moving knife base and the moving knife.

Furthermore, a limit block is provided on the isolating knife switch synchronization shaft, and a closing limit pin and an opening limit pin are provided on the box body. When the isolating knife switch mechanism is closed by pulling the isolating operating handle, the limit block will rotate with the isolating knife switch synchronization shaft. When the limit block is blocked by the closing limit pin, the limit block cannot continue to move under the limitation of the closing limit pin, so that the isolating operating handle cannot be pulled either, thereby ensuring the accuracy of the closing position; when the isolating operating handle is pulled to open the isolating knife switch mechanism, the limit block will rotate with the isolating knife switch synchronization shaft. When the limit block is blocked by the opening limit pin, the limit block cannot continue to move under the limitation of the opening limit pin, so that the isolating operating handle cannot be pulled either, thereby ensuring the accuracy of the opening position.

Furthermore, the operating mechanism also includes a synchronization mechanism arranged between the isolation knife switch synchronization shaft and the housing, the synchronization mechanism including a short crank arm, a synchronization spring, a long pin and a synchronization base; the synchronization base is installed on the housing, one end of the short crank arm is fixedly connected to the isolation knife switch synchronization shaft, and the other end of the short crank arm is hinged to one end of the long pin; the other end of the long pin is slidably connected to the synchronization base; the synchronization spring is sleeved on the long pin, one end of the synchronization spring acts on the long pin, and the other end of the synchronization spring acts on the synchronization base. Since the three sealed poles are separate and the isolation operation mode of the isolation knife switch mechanism is mechanical transmission, considering each person's operation mode, ensuring that each person can completely close and open the switch and also ensure the synchronization of the three-phase closing and opening of the isolation knife switch, a synchronization mechanism is also provided on the isolation synchronization shaft; when the isolation knife switch mechanism is in the closing position, the synchronization spring is in a compressed state (small compression amount), and the elastic force of the synchronization spring in the compressed state can ensure the stability of the closing, and cooperate with the limit block to ensure that the moving knife is reliably in the closing position; when the isolation knife switch mechanism is in the opening position, the synchronization spring is in a compressed state (large compression amount), and the large compression amount can facilitate the closing of the isolation knife switch mechanism and reduce the closing operation torque, and cooperate with the limit block to ensure that the moving knife is reliably in the opening position.

Preferably, a hard interlocking device is provided between the isolating knife switch synchronization shaft and the circuit breaker synchronization shaft, and the hard interlocking device includes a transmission gear arranged on the isolating knife switch synchronization shaft, a ratchet gear arranged on the box body, two pawls hinged on the box body, a tension spring arranged between each pawl and the box body, a sliding rod movably arranged on the box body, a cam arranged on the circuit breaker synchronization shaft for driving the sliding rod to move, and a movable pull rod arranged between the sliding rod and each of the pawls; the transmission gear and the ratchet gear are meshed with each other, one end of the movable pull rod is hinged to the pawl, and the other end of the movable pull rod is slidably and rotatably connected to one end of the sliding rod; the elastic force of the tension spring causes the pawl to mesh with the ratchet gear. When the vacuum interrupter is in the closed position, the pawl is subjected to the spring force of the tension spring, causing the pawl to engage with the ratchet gear. At this time, the ratchet gear cannot rotate, and the transmission gear cannot rotate either, resulting in the inability of the isolation operating handle to rotate, and the isolation knife switch mechanism cannot be opened or closed; when the vacuum interrupter is in the open position, the cam on the synchronous shaft of the circuit breaker presses on the sliding rod, pushing the sliding rod to move, driving the movable pull rod to move, thereby driving the pawl to overcome the elastic force of the tension spring and disengage from the ratchet gear. At this time, the ratchet gear can rotate, and the isolation operating handle can be operated to achieve the opening or closing of the isolation knife switch mechanism.

Compared with the prior art, the present invention has the following beneficial effects:

1. The outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch in the present invention adopts a magnetic control mechanism instead of the spring mechanism in the prior art. The magnetic control mechanism drives the moving end of the vacuum interrupter to move up and down by moving up and down, thereby realizing the closing and opening of the vacuum interrupter, thereby avoiding the abnormal problems such as jamming in the closing and opening process caused by the multi-stage transmission of the spring mechanism in the prior art; the structure is simpler, there is no need to increase the transmission structure, the risk of failure is reduced, and maintenance is reduced.

2. In the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch of the present invention, the isolating static contact, the moving knife base and the moving knife assembly of the isolating knife switch mechanism are arranged inside the pole body, which is isolated from the outside world, avoiding oxidation, rust and adhesion of the isolating static contact, the moving knife base and the moving knife assembly due to dirt, thereby ensuring smooth opening and closing actions of the isolating knife switch mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of one specific implementation of an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation switch in the present invention.

FIG2 is a front view of the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch in the present invention.

Fig. 3 is a cross-sectional view along the A-A direction in Fig. 2 .

FIG. 4 is a schematic diagram of the internal structure of the sealed pole in the present invention.

FIG5 is a schematic diagram of the three-dimensional structure of the bottom of the hidden box of the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation switch in the present invention.

6 is a bottom view of the bottom of the hidden box of the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch in the present invention.

FIG. 7 is a schematic diagram of the three-dimensional structure of the bottom and side of the hidden box of the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation switch in the present invention.

FIG8 is a three-dimensional structural diagram of a partial structure of an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch in the present invention.

FIG. 9 is a schematic diagram of the three-dimensional structure of the magnetron mechanism in the present invention.

FIG. 10 is a cross-sectional view of the magnetron mechanism of the present invention.

FIG. 11 is a schematic diagram of the three-dimensional structure of the separation and combination indicating device in the present invention.

FIG. 12 is a schematic diagram of the three-dimensional structure of the opening and closing device in the present invention.

FIG. 13 is a rear view of the opening and closing device of the present invention.

FIG. 14 is a schematic diagram of the three-dimensional structure of the isolation knife switch mechanism in the present invention.

FIG. 15 is a schematic diagram of the structure of the hard interlocking device in the present invention.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

1 to 3 , this embodiment discloses an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating switch, including a box body 1 , a sealed pole 2 , a magnetic control mechanism 3 and an isolating switch mechanism 4 .

Referring to Figures 1 to 8, the sealed pole 2 includes a pole body 21 arranged outside the box body 1, a vacuum arc chamber 22 arranged inside the pole body 21, and a soft busbar 23; the pole body 21 is provided with an incoming line terminal 15 and an outgoing line terminal 16; the static end of the vacuum arc chamber 22 passes through the pole reserved hole arranged on the pole body 21 and is connected to the incoming line terminal 15; the magnetic control mechanism 3 is arranged in the box body 1, and the moving end of the vacuum arc chamber 22 is connected to the magnetic control mechanism 3, and the magnetic control mechanism 3 is used to control the closing and opening of the vacuum arc chamber 22.

Referring to Figures 1 to 7 and 14, the isolation knife switch mechanism 4 includes an isolation knife switch assembly and an operating mechanism 41; the isolation knife switch assembly is arranged inside the pole body 21, and the isolation knife switch assembly includes an isolation static contact 42, a moving knife base 43 and a moving knife assembly 44; the isolation static contact 42 is connected to the outgoing line terminal 16; the moving knife base 43 is connected to the moving knife assembly 44; one end of the soft busbar 23 is connected to the moving end of the vacuum arc extinguishing chamber 22, and the other end of the soft busbar 23 is connected to the moving knife base 43; the operating mechanism 41 is used to drive the moving knife assembly 44 to move inside the pole body 21, so that the moving knife assembly 44 contacts or separates from the isolation static contact 42, so as to realize the closing and opening of the isolation knife switch mechanism 4.

Referring to Figures 1 to 3, the box body 1 is made of stainless steel plates that are bent and welded. The protection level of the box body 1 can reach IP67, which can protect the components installed in the box body 1 and improve the service life of the outdoor high-voltage AC magnetic vacuum circuit breaker with a built-in isolation knife switch. Considering the use of the distribution network engineering solution, the pole body 21 of the sealed pole 2 used in this embodiment completely seals the phase sequence zero sequence current sensor in it during the manufacturing process, and the voltage sensor and the power-taking capacitor on the incoming and outgoing line sides are separately packaged. The phase sequence zero sequence current sensor is installed on the outgoing line side of the pole body 21 to provide signals for subsequent measurement and protection; the voltage sensor can be installed on the incoming line side or the outgoing line side of the pole body 21 according to actual needs; in order to increase the power of the power-taking capacitor, the power-taking capacitor can be installed on the incoming or outgoing line side of the pole body 21; at the same time, in order to replace the vacuum arc chamber 22, the vacuum arc chamber 22 is not sealed in the pole body 21 when epoxy casting is performed.

Referring to Figures 1-4 and 7-8, the sealed pole 2 also includes a connecting rod 24, an insulating rod 25 and an adjusting rod 26 arranged inside the pole body 21; the upper end of the connecting rod 24 is connected to the moving end of the vacuum arc chamber 22, the lower end of the connecting rod 24 is connected to the upper end of the insulating rod 25, the lower end of the insulating rod 25 is connected to the upper end of the adjusting rod 26, and the lower end of the adjusting rod 26 is connected to the magnetron mechanism 3. In the above structure, the insulating pull rod 25 mainly plays an insulating role, and the isolating static contact 42 is connected to the outgoing terminal 16 through the conductive rod 17. During installation, first, one end of the soft busbar 23 is threadedly connected and fixed to the moving end (lower end) of the vacuum interrupter 22 through the connecting rod 24, the lower end of the connecting rod 24 is threadedly connected to the insulating pull rod 25, and the lower end of the insulating pull rod 25 is threadedly fixed to the adjusting rod 26, and then the entire assembled vacuum interrupter 22 is installed in the pole body 21, the static end (upper end) of the vacuum interrupter 22 passes through the reserved hole of the pole, and then is locked and fixed with a nut, and then the incoming terminal 15 is installed, the other end of the soft busbar 23 is connected to the moving knife base 43, and then the conductive rod 17 is installed, the conductive rod 17 passes through the pole body 21 and is connected to the isolating static contact 42, the outgoing terminal 16 is installed on the conductive rod 17, and then the moving knife assembly 44 is installed to complete the assembly of the sealed pole 2.

Referring to Figures 1 to 6 and Figures 8 to 10, the magnetic control mechanism 3 includes a mounting frame 31 arranged on the box body 1, a static iron core 32 and a moving iron core 33 arranged on the mounting frame 31, a trip spring 34 and an overtravel spring 35 arranged between the static iron core 32 and the moving iron core 33; the moving iron core 33 is installed below the static iron core 32, the overtravel spring 35 is located inside the trip spring 34, and the lower end of the adjusting rod 26 passes through the static iron core 32 and the moving iron core 33 in sequence; one end of the trip spring 34 acts on the static iron core 32 or the mounting frame 31, and the other end of the trip spring 34 acts on the moving iron core 33, and the overtravel spring 35 acts between the moving iron core 33 and the adjusting rod 26; the overtravel spring 35 and the trip spring 34 are sleeved on the adjusting rod 26. The magnetron mechanism 3 is adopted, with a small number of parts, which greatly reduces the failure rate in later use and does not require a transmission mechanism; the static iron core 32 includes a yoke, a magnet and a coil; the magnetron mechanism 3 is controlled by a controller. When working, a closing command is given to the controller through the controller, and the controller passes a certain current through the coil in the static iron core 32. After the coil is energized, a magnetic field is generated, and the generated magnetic field is in the same direction as the magnet in the static iron core 32. The upper end of the moving iron core 33 generates an upward suction force and weakens the permanent magnet magnetic field under the moving iron core 33. When the upward force is greater than the downward force, the moving iron core 33 overcomes the elastic force of the opening spring 34 and the overtravel spring 35 under the action of the magnetic force and is attracted to the static iron core 32. The moving iron core 33 moves upward while driving the adjustment rod 26 to move, and the insulating pull rod 25 and the connecting rod 24 also move upward, thereby driving the moving end of the vacuum arc extinguishing chamber 22 to move upward, so that the vacuum arc is extinguished. The moving iron core 33 is in the state of being closed by the moving iron core 33. ...

Referring to Fig. 1 to Fig. 6 and Fig. 8 to Fig. 10, the mounting frame 31 comprises a mounting plate 311, a support rod 312 and a limit plate 313. The mounting plate 311 is arranged at the top of the box body 1, the support rod 312 is connected between the mounting plate 311 and the limit plate 313, the static iron core 32 is mounted on the mounting plate 311, and the moving iron core 33 is slidably connected with the limit plate 313 through a guide pin 38. The support rod 312 fixes the mounting plate 311 and the limit plate 313; by setting the guide pin 38, it is ensured that the magnetic control mechanism 3 will not produce a large displacement during the process of controlling the opening and closing of the switch, and it also plays a guiding role. One end of the guide pin 38 is connected with the moving iron core 33, and the other end passes through the limit plate 313.

The mounting plate 311 is fixed to the box body 1 by bolts and nuts.

1 to 10 , the upper end of the adjusting rod 26 is threadedly connected to the lower end of the insulating pull rod 25 , the lower end of the moving iron core 33 is provided with a fixing plate 36 , the lower end of the adjusting rod 26 passes through the fixing plate 36 , and the lower end of the adjusting rod 26 is provided with a flange hexagonal nut 37 . When installing the above structure, the magnetron mechanism 3 and the housing 1 are fixed with bolts and nuts. Since the upper end of the adjusting rod 26 is connected to the lower end of the insulating pull rod 25 by threads, the distance between the upper end face of the adjusting rod 26 and the top of the housing 1 can be changed. The purpose of adjusting the distance is mainly to ensure that when the magnetron mechanism 3 is in the closed state, the elastic force provided by the compression of the overtravel spring 35 inside the magnetron mechanism 3 matches the contact pressure of the vacuum arc chamber 22; when installing the flange hexagonal nut 37, the distance between the upper end face of the flange hexagonal nut 37 and the lower end face of the fixing plate 36 is ensured, because the overtravel spring 35 is placed inside the magnetron mechanism 3, changing this distance can change the overtravel. Since the total movement stroke of the magnetron mechanism 3 remains unchanged, the opening distance of the vacuum arc chamber 22 is changed while changing the overtravel.

Referring to Fig. 1 to Fig. 10, a circuit breaker synchronization shaft 7 is rotatably provided on the housing 1, and a transmission assembly is provided between the circuit breaker synchronization shaft 7 and the fixed plate 36, and the transmission assembly includes a connecting plate 8 provided on the fixed plate 36 and a synchronization shaft connecting rod 9 provided on the circuit breaker synchronization shaft 7, and the synchronization shaft connecting rod 9 is hinged with the connecting plate 8 through a pin shaft. The outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation knife switch in this embodiment is a three-phase circuit breaker, and three of the sealed poles 2 are provided, and three corresponding magnetic control mechanisms 3 and isolation knife switch assemblies are provided. By providing the circuit breaker synchronization shaft 7, it can be ensured that the three magnetic control mechanisms 3 can move synchronously, so that the time of opening and closing of the three-phase circuit breaker can be reduced.

1 to 8 , bearings are installed at both ends of the circuit breaker synchronization shaft 7 , and the bearings are connected to the box body 1 through a mounting sleeve 10 and a mounting sleeve fixing plate 11 .

Referring to Figures 1 to 8, a first microswitch 12 is provided on the box body 1, and a microswitch pressing block 13 for triggering the first microswitch 12 is provided on the circuit breaker synchronization shaft 7. The circuit breaker synchronization shaft 7 rotates clockwise or counterclockwise, driving the microswitch pressing block 13 to rotate clockwise or counterclockwise, so that the microswitch pressing block 13 presses or does not press the first microswitch 12, so that the first microswitch 12 outputs a dry contact signal to provide the controller with an opening and closing position signal. For example, when the magnetic control mechanism 3 drives the vacuum interrupter 22 to close, the circuit breaker synchronous shaft 7 will rotate, driving the microswitch pressure block 13 to rotate as well. The microswitch pressure block 13 presses the first microswitch 12, and the first microswitch 12 is triggered, outputting a dry contact signal, and providing a closing position signal for the controller; when the magnetic control mechanism 3 drives the vacuum interrupter 22 to open, the circuit breaker synchronous shaft 7 will rotate in the opposite direction, driving the microswitch pressure block 13 to rotate as well. The microswitch pressure block 13 is separated from the first microswitch 12, that is, the microswitch pressure block 13 does not press the first microswitch 12, and the first microswitch 12 is not triggered, and outputs a dry contact signal, and provides an opening position signal for the controller.

Referring to FIG. 8 , the first micro switch 12 is disposed on the mounting sleeve fixing plate 11 .

Referring to Figures 1-2, 5-8 and 11, it also includes an opening and closing indication device 5, which includes a first opening and closing mark 51 arranged on the outside of the box body 1, a rotating shaft 52 rotatably arranged on the box body 1, a first pointer 53 arranged at the outer end of the rotating shaft 52 for indicating the first opening and closing mark 51, a fork 54 arranged at the inner end of the rotating shaft 52, a long connecting rod 55 arranged on the circuit breaker synchronization shaft 7, and a transmission rod 56 arranged between the fork 54 and the long connecting rod 55; the end of the fork 54 is provided with an open groove; one end of the transmission rod 56 is fixedly connected to the long connecting rod 55, and the other end of the transmission rod 56 extends into the open groove. In the above structure, by setting the opening and closing indicating device 5, it is convenient for the operator to know the opening and closing status of the outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch. The first pointer 53 is located on the outside of the box body 1, and the fork 54 is located on the inside of the box body 1. The magnetic control mechanism 3 drives the adjusting rod 26 to move up and down. When the vacuum arc chamber 22 is closed or opened, the fixed plate 36 will move up and down with the moving iron core 33. Under the action of the transmission component, the circuit breaker synchronization shaft 7 is driven to rotate forward or reverse, thereby driving the long connecting rod 55 to rotate, and then driving the transmission rod 56 to rotate around the circuit breaker synchronization shaft 7. The transmission rod 56 will push the fork 54 upward or downward, driving the rotating shaft 52 to rotate, so that the first pointer 53 indicates the closing position or the opening position in the first opening and closing mark 51.

Referring to Figures 1-6 and Figures 12-13, it also includes a switch opening and closing device 6 arranged on the box body 1 for controlling the magnetic control mechanism 3 to perform opening and closing, and the switch opening and closing device 6 includes a switch opening and closing operating handle 61, a mounting shaft 62, a switch opening and closing shaft plate 63, a reset spring 64 and a second micro switch 65; the mounting shaft 62 is rotatably arranged on the box body 1, the switch opening and closing operating handle 61 is fixed to the outer end of the mounting shaft 62, the switch opening and closing shaft plate 63 is fixed to the inner end of the mounting shaft 62, and the switch opening and closing shaft plate 63 is provided with a plurality of round pins 66 for triggering the second micro switch 65, and two second micro switches 65 are provided, and the two second micro switches 65 are symmetrically distributed and installed on the box body 1, and the second micro switch 65 is connected to the controller; one end of the reset spring 64 acts on the box body 1, and the other end of the reset spring 64 acts on the switch opening and closing shaft plate 63. The working principle of the above structure is as follows: the staff pulls down the left side of the opening and closing operating handle 61, and overcomes the elastic force of the reset spring 64, driving the installation shaft 62 and the opening and closing shaft plate 63 to rotate counterclockwise, and the round pin 66 also rotates together, and one of the round pins 66 will press the second microswitch 65 on the left, and the second microswitch 65 on the left will change from a normally open point to a normally closed point, providing an opening control signal for the controller, and the controller controls the magnetic control mechanism 3 to work, so that the vacuum arc extinguishing chamber 22 is opened, thereby completing the opening action; release the opening and closing operating handle 61, the reset spring 64 is reset, and it will drive the opening and closing shaft plate 63 and the opening and closing operating handle to open. 61 is reset; similarly, the staff pulls down the right side of the opening and closing operating handle 61, and overcomes the elastic force of the reset spring 64, driving the installation shaft 62 and the opening and closing shaft plate 63 to rotate clockwise together, and the round pin 66 also rotates together, and the other round pin 66 will press the second microswitch 65 on the right side, and the second microswitch 65 on the right side changes from a normally open point to a normally closed point, providing a closing control signal for the controller, and the controller controls the magnetic control mechanism 3 to work, so that the vacuum arc extinguishing chamber 22 is closed, thereby completing the closing action; release the opening and closing operating handle 61, the reset spring 64 is reset, and the opening and closing shaft plate 63 and the opening and closing operating handle 61 are reset.

Referring to FIGS. 1 to 7 and 14, the movable knife assembly 44 includes a movable knife 441 and a movable knife guide 442. The upper end of the movable knife 441 passes through the movable knife base 43, and the lower end of the movable knife 441 is connected to the upper end of the movable knife guide 442 by bolts; the movable knife guide 442 is vertically slidably arranged inside the pole body 21; the operating mechanism 41 includes an isolation knife switch synchronization shaft 411, an isolation knife switch connecting rod 412, a long crank arm 413 and an isolation operating handle 414; the isolation knife gate synchronization shaft 411 is rotatably set on the box body 1, and the isolation operating handle 414 is set outside the box body 1 and connected to the isolation knife gate synchronization shaft 411; one end of the isolation knife gate connecting rod 412 is hinged to the lower end of the movable knife guide 442 through a nylon pin, and the other end of the isolation knife gate connecting rod 412 is hinged to one end of the long crank arm 413 through a nylon pin, and the other end of the long crank arm 413 is fixedly connected to the isolation knife gate synchronization shaft 411. In the above structure, the isolation knife switch mechanism 4 adopts a plug-in structure. The staff pulls down the left side of the isolation operating handle 414 to drive the isolation knife switch synchronization shaft 411 to rotate, drive the long crank arm 413 to rotate, and then drive the isolation knife switch connecting rod 412 to move, thereby driving the movable knife guide 442 to move downward, so that the movable knife 441 moves downward, and the upper end of the movable knife 441 is separated from the isolation static contact 42, so as to realize the opening of the isolation knife switch mechanism 4; similarly, the staff pulls down the right side of the isolation operating handle 414, with The moving isolation knife switch synchronization shaft 411 rotates in the opposite direction, driving the long crank arm 413 to rotate in the opposite direction, and then driving the isolation knife switch connecting rod 412 to move, thereby driving the moving knife guide 442 to move upward, so that the moving knife 441 moves upward, and the upper end of the moving knife 441 contacts the isolation static contact 42, realizing the closing of the isolation knife switch mechanism 4; correspondingly, there are three isolation knife switch connecting rods 412 and long crank arms 413, and the isolation knife switch synchronization shaft 411 can realize the synchronous movement of the three moving knife assemblies 44, realizing synchronous closing and opening.

1 to 7 and 14, a vertically extending guide groove is provided in the pole body 21, and the movable knife guide 442 is provided with a guide block, and the guide block is slidably matched with the guide groove. By providing the guide groove, the stability of the movable knife guide 442 in the vertical direction is ensured.

Referring to Fig. 1 to Fig. 7 and Fig. 14, the housing 1 is provided with a second opening and closing mark 45, and the isolating knife switch synchronization shaft 411 is provided with a second pointer 46 for indicating the second opening and closing mark 45. When the isolating operating handle 414 is pulled to realize the opening of the isolating knife switch mechanism 4, the second pointer 46 moves with the isolating knife switch synchronization shaft 411, and the second pointer 46 points to the opening position of the second opening and closing mark 45; when the isolating operating handle 414 is pulled to realize the closing of the isolating knife switch mechanism 4, the second pointer 46 moves with the isolating knife switch synchronization shaft 411, and the second pointer 46 points to the closing position of the second opening and closing mark 45. By setting the above structure, it is convenient to identify the closing and opening.

Referring to Figures 1 to 7 and 14, the isolating static contact 42 and the moving knife base 43 have been sealed in a fixed position during the epoxy pouring process of the pole body 21, and spring contact fingers 48 are installed inside the isolating static contact 42 and the moving knife base 43. The spring contact fingers 48 are used to increase the contact pressure between the isolating static contact 42, the moving knife base 43 and the moving knife 441, thereby ensuring good contact between the isolating static contact 42, the moving knife base 43 and the moving knife 441.

Referring to FIGS. 1 to 7 and 14 , a limit block 47 is provided on the isolation knife gate synchronous shaft 411, and a closing limit pin and an opening limit pin for limiting the limit block 47 are provided on the box body 1. The closing limit pin and the opening limit pin are arranged in parallel with the isolation knife gate synchronous shaft 411. When the isolation operating handle 414 is pulled to close the isolation knife gate mechanism 4, the limit block 47 will rotate with the isolation knife gate synchronous shaft 411. When the limit block 47 is blocked by the closing limit pin, under the limit of the closing limit pin, the limit block 47 cannot continue to move, so that the isolation operating handle 414 cannot be pulled, thereby ensuring the accuracy of the closing position; when the isolation operating handle 414 is pulled to open the isolation knife gate mechanism 4, the limit block 47 will rotate with the isolation knife gate synchronous shaft 411. When the limit block 47 is blocked by the opening limit pin, under the limit of the opening limit pin, The limit block 47 cannot continue to move, so that the isolation operating handle 414 cannot be pulled, thereby ensuring the accuracy of the opening position.

Referring to Figures 1 to 7 and 14, the operating mechanism 41 also includes a synchronization mechanism 415 arranged between the isolation knife switch synchronization shaft 411 and the housing 1, and the synchronization mechanism 415 includes a short crank arm 4151, a synchronization spring 4152, a long pin 4153 and a synchronization base 4154; the synchronization base 4154 is installed on the housing 1, one end of the short crank arm 4151 is fixedly connected to the isolation knife switch synchronization shaft 411, and the other end of the short crank arm 4151 is hinged to one end of the long pin 4153; the other end of the long pin 4153 is slidably connected to the synchronization base 4154; the synchronization spring 4152 is sleeved on the long pin 4153, one end of the synchronization spring 4152 acts on the long pin 4153, and the other end of the synchronization spring 4152 acts on the synchronization base 4154. Since the three sealed poles 2 are independent and the isolation operation mode of the isolation knife switch mechanism 4 is mechanical transmission, considering each person's operation mode, ensuring that each person can completely close and open the switch and also ensuring the synchronization of the three-phase closing and opening of the isolation knife switch, a synchronization mechanism 415 is also provided on the isolation synchronization shaft; when the isolation knife switch mechanism 4 is in the closing position, the synchronization spring 4152 is in a compressed state (small compression amount), and the elastic force of the synchronization spring 4152 in the compressed state can ensure the stability of the closing, and cooperate with the limit block 47 to ensure that the moving knife 441 is reliably in the closing position; when the isolation knife switch mechanism 4 is in the opening position, the synchronization spring 4152 is in a compressed state (large compression amount), and the large compression amount can facilitate the closing of the isolation knife switch mechanism 4 and reduce the closing operation torque, and cooperate with the limit block 47 to ensure that the moving knife 441 is reliably in the opening position. In addition, in another implementation manner of the isolation knife gate mechanism 4, when the isolation knife gate mechanism 4 is in the closing position, the synchronization spring 4152 is in a compressed state (with a large amount of compression), which facilitates the opening of the isolation knife gate mechanism 4 and reduces the opening operation torque; due to the limit block 47, the movable knife 441 is ensured to be reliably in the closing position; when the isolation knife gate mechanism 4 is in the opening position, the synchronization spring 4152 is in a compressed state (with a small amount of compression), and the elastic force of the synchronization spring 4152 in the compressed state can ensure the stability of the opening, and cooperate with the limit block 47 to ensure that the movable knife 441 is reliably in the opening position.

Referring to Figures 1 to 7 and 15, the distribution network products must have five preventive measures during use. A hard interlocking device 14 is provided between the isolating knife switch synchronization shaft 411 and the circuit breaker synchronization shaft 7. The hard interlocking device 14 includes a transmission gear 141 provided on the isolating knife switch synchronization shaft 411, a ratchet gear 142 provided on the housing 1, two ratchets 143 hinged on the housing 1, a tension spring 144 provided between each ratchet 143 and the housing 1, a slide bar 145 movably provided on the housing 1, and a drive rod 146 provided on the circuit breaker synchronization shaft 7 for driving the slide bar 147. The movable cam 146 is provided with a movable pull rod 147 between the slide bar 145 and each of the ratchet pawls 143; the two ratchet pawls 143 are symmetrically distributed in the upper and lower parts; the transmission gear 141 and the ratchet gear 142 are meshed with each other; one end of the movable pull rod 147 is hinged with the ratchet pawl 143, and the other end of the movable pull rod 147 is slidably and rotatably connected with one end of the slide bar 145; the elastic force of the tension spring 144 causes the ratchet pawl 143 to mesh with the ratchet gear 142. When the vacuum interrupter 22 is in the closed position, the pawl 143 is subjected to the spring force of the tension spring 144, so that the pawl 143 engages with the ratchet gear 142. At this time, the ratchet gear 142 cannot rotate, and the transmission gear 141 cannot rotate either, resulting in the isolation operating handle 414 being unable to rotate, and the isolation knife switch mechanism 4 being unable to open or close the switch; when the vacuum interrupter 22 is in the open position, the cam 146 on the circuit breaker synchronization shaft 7 presses on the slide bar 145, pushing the slide bar 145 to move, driving the movable pull rod 147 to move, thereby driving the pawl 143 to overcome the elastic force of the tension spring 144 and disengage from the ratchet gear 142. At this time, the ratchet gear 142 can rotate, and the isolation operating handle 414 can be operated to achieve the opening or closing of the isolation knife switch mechanism 4.

Referring to Figures 1 to 7, the working principle of the above-mentioned outdoor high-voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch is:

The magnetic control mechanism 3 drives the moving end of the vacuum interrupter 22 to move up and down by moving up and down, so as to realize the closing and opening of the vacuum interrupter 22, thereby avoiding the abnormal problems such as jamming in the closing and opening process caused by the multi-stage transmission of the spring mechanism in the prior art; by operating the operating mechanism 41, the operating mechanism 41 will drive the moving knife assembly 44 to move up and down, so as to complete the contact and separation between the moving knife assembly 44 and the isolating static contact 42, thereby realizing the action of closing and disconnecting. The isolating static contact 42, the moving knife base 43 and the moving knife assembly 44 of the isolating knife switch mechanism 4 are arranged inside the pole body 21, and play an isolating role from the outside world, so as to avoid oxidation, rust and adhesion of the isolating static contact 42, the moving knife base 43 and the moving knife assembly 44 due to the influence of dirt, and ensure the smooth closing and opening action of the isolating knife switch mechanism 4.

The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims (10)

1. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation switch, characterized in that it includes a box, a sealed pole, a magnetic control mechanism and an isolation switch mechanism; wherein, The sealed pole comprises a pole body arranged outside the box, a vacuum interrupter arranged inside the pole body, and a flexible busbar; the pole body is provided with an incoming wiring terminal and an outgoing wiring terminal; the static end of the vacuum interrupter passes through a pole reserved hole arranged on the pole body and is connected to the incoming wiring terminal; the magnetic control mechanism is arranged in the box, the moving end of the vacuum interrupter is connected to the magnetic control mechanism, and the magnetic control mechanism is used to control the closing and opening of the vacuum interrupter; The isolating knife switch mechanism includes an isolating knife switch assembly and an operating mechanism; the isolating knife switch assembly is arranged inside the pole body, and the isolating knife switch assembly includes an isolating static contact, a moving knife base and a moving knife assembly; the isolating static contact is connected to the outgoing line terminal; the moving knife base is connected to the moving knife assembly; one end of the soft busbar is connected to the moving end of the vacuum arc extinguishing chamber, and the other end of the soft busbar is connected to the moving knife base; the operating mechanism is used to drive the moving knife assembly to move inside the pole body, so that the moving knife assembly contacts or separates from the isolating static contact. 2. According to claim 1, an outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch is characterized in that the sealed pole also includes a connecting rod, an insulating pull rod and an adjusting rod arranged inside the pole body; the upper end of the connecting rod is connected to the moving end of the vacuum arc extinguishing chamber, the lower end of the connecting rod is connected to the upper end of the insulating pull rod, the lower end of the insulating pull rod is connected to the upper end of the adjusting rod, and the lower end of the adjusting rod is connected to the magnetic control mechanism. 3. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch according to claim 2, characterized in that the magnetic control mechanism includes a mounting frame arranged on the box body, a static iron core and a moving iron core arranged on the mounting frame, a trip spring and an overtravel spring arranged between the static iron core and the moving iron core; the moving iron core is installed below the static iron core, the overtravel spring is located inside the trip spring, and the lower end of the adjusting rod passes through the static iron core and the moving iron core in sequence; one end of the trip spring acts on the static iron core, the other end of the trip spring acts on the moving iron core, and the overtravel spring acts between the moving iron core and the adjusting rod. 4. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch according to claim 3, characterized in that the upper end of the adjusting rod is connected to the lower end of the insulating pull rod by a thread, the lower end of the moving iron core is provided with a fixing plate, the lower end of the adjusting rod passes through the fixing plate, and the lower end of the adjusting rod is provided with a flange hexagonal nut. 5. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch according to claim 4, characterized in that a circuit breaker synchronization shaft is rotatably provided on the box body, a transmission assembly is provided between the circuit breaker synchronization shaft and the fixed plate, the transmission assembly comprises a connecting plate arranged on the fixed plate and a synchronization shaft connecting rod arranged on the circuit breaker synchronization shaft, and the synchronization shaft connecting rod is hinged to the connecting plate through a pin shaft. 6. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch according to claim 5, characterized in that a first microswitch is provided on the box body, and a microswitch pressure block for triggering the first microswitch is provided on the circuit breaker synchronization shaft, and the circuit breaker synchronization shaft rotates clockwise or counterclockwise, driving the microswitch pressure block to rotate clockwise or counterclockwise, so that the microswitch pressure block presses or does not press the first microswitch, thereby causing the first microswitch to output a dry contact signal to provide a switch-on and switch-off position signal for the controller. 7. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch according to claim 5, characterized in that it also includes an opening and closing indication device, the opening and closing indication device including a first opening and closing mark arranged on the outside of the box body, a rotating shaft rotatably arranged on the box body, a first pointer arranged at the outer end of the rotating shaft for indicating the first opening and closing mark, a fork arranged at the inner end of the rotating shaft, a long connecting rod arranged on the circuit breaker synchronization shaft, and a transmission rod arranged between the fork and the long connecting rod; an open groove is provided at the end of the fork; one end of the transmission rod is fixedly connected to the long connecting rod, and the other end of the transmission rod extends into the open groove. 8. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolating knife switch according to claim 6, characterized in that it also includes a switch opening and closing device arranged on the box body for controlling the magnetic control mechanism to perform switch opening and closing, and the switch opening and closing device includes a switch opening and closing operating handle, a mounting shaft, a switch opening and closing shaft plate, a reset spring and a second microswitch; the mounting shaft is rotatably arranged on the box body, the switch opening and closing operating handle is fixed to the outer end of the mounting shaft, the switch opening and closing shaft plate is fixed to the inner end of the mounting shaft, and the switch opening and closing shaft plate is provided with a plurality of round pins for triggering the second microswitch, and two second microswitches are provided, and the two second microswitches are symmetrically distributed, and the second microswitch is connected to the controller; one end of the reset spring acts on the box body, and the other end of the reset spring acts on the switch opening and closing shaft plate. 9. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation knife switch according to claim 5, characterized in that the moving knife assembly includes a moving knife and a moving knife guide, the upper end of the moving knife passes through the moving knife base, and the lower end of the moving knife is connected to the upper end of the moving knife guide; the moving knife guide is vertically slidably arranged inside the pole body; the operating mechanism includes an isolation knife switch synchronization shaft, an isolation knife switch connecting rod, a long crank arm and an isolation operating handle; the isolation knife switch synchronization shaft is rotatably arranged on the box body, and the isolation operating handle is arranged outside the box body and connected to the isolation knife switch synchronization shaft; one end of the isolation knife switch connecting rod is hinged to the lower end of the moving knife guide, the other end of the isolation knife switch connecting rod is hinged to one end of the long crank arm, and the other end of the long crank arm is fixedly connected to the isolation knife switch synchronization shaft; The box body is provided with a second opening and closing mark, and the isolating knife switch synchronization shaft is provided with a second pointer for indicating the second opening and closing mark. When the isolating operating handle is pulled to realize the opening of the isolating knife switch mechanism, the second pointer moves with the isolating knife switch synchronization shaft, and the second pointer points to the opening position of the second opening and closing mark; when the isolating operating handle is pulled to realize the closing of the isolating knife switch mechanism, the second pointer moves with the isolating knife switch synchronization shaft, and the second pointer points to the closing position of the second opening and closing mark. A limit block is provided on the isolating knife switch synchronization shaft, and a closing limit pin and an opening limit pin are provided on the box body; The operating mechanism also includes a synchronization mechanism arranged between the isolation knife switch synchronization shaft and the box body, and the synchronization mechanism includes a short crank arm, a synchronization spring, a long pin and a synchronization base; the synchronization base is installed on the box body, one end of the short crank arm is fixedly connected to the isolation knife switch synchronization shaft, and the other end of the short crank arm is hinged to one end of the long pin; the other end of the long pin is slidably connected to the synchronization base; the synchronization spring is sleeved on the long pin, one end of the synchronization spring acts on the long pin, and the other end of the synchronization spring acts on the synchronization base. 10. An outdoor high-voltage AC magnetically controlled vacuum circuit breaker with a built-in isolation knife switch according to claim 9, characterized in that a hard interlocking device is provided between the isolation knife switch synchronization shaft and the circuit breaker synchronization shaft, and the hard interlocking device comprises a transmission gear arranged on the isolation knife switch synchronization shaft, a ratchet gear arranged on the housing, two ratchets hinged on the housing, a tension spring arranged between each ratchet and the housing, a sliding rod movably arranged on the housing, a cam arranged on the circuit breaker synchronization shaft for driving the sliding rod to move, and a movable pull rod arranged between the sliding rod and each of the ratchets; the transmission gear is meshed with the ratchet gear, one end of the movable pull rod is hinged with the ratchet, and the other end of the movable pull rod is slidably and rotatably connected with one end of the sliding rod; the elastic force of the tension spring causes the ratchet to mesh with the ratchet gear.