CN213635769U

CN213635769U - Circuit breaker

Info

Publication number: CN213635769U
Application number: CN202023226386.8U
Authority: CN
Inventors: 朱佳梦; 周健
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-07-06
Anticipated expiration: 2030-12-28

Abstract

A circuit breaker belongs to the technical field of low-voltage electrical appliances. Comprises a breaker frame, a rotating shaft interlocking device and an operating mechanism; the operating mechanism comprises a switching-on half shaft rotatably arranged on the breaker frame, the rotating shaft interlocking device comprises a switching-on interlocking part arranged on the breaker frame and an interlocking rotating shaft rotatably arranged on the breaker frame, one end of the switching-on interlocking part is matched with the interlocking rotating shaft, and the other end of the switching-on interlocking part is matched with the switching-on half shaft; the method is characterized in that: the circuit breaker further comprises an interlocking transmission part fixedly arranged at the top of the frame, and the interlocking transmission part is used for receiving external drive to drive an interlocking rotating shaft to move so as to drive a closing interlocking part to limit a closing half shaft to realize interlocking and enable the circuit breaker to be incapable of closing. The advantages are that: the special requirements of users are met by changing the connecting position of the rotating shaft interlocking device and the external interlocking device.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker.

Background

The vacuum circuit breaker has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinction, is important switch equipment in power distribution network application, and is responsible for double tasks of controlling and protecting a circuit, so the performance quality of the vacuum circuit breaker is one of important factors for determining whether a power system can safely supply power.

The medium-high voltage switch cabinet for power supply and distribution equipment is mainly composed of operating elements such as a circuit breaker, a disconnecting switch and a grounding switch, and measuring and protecting elements such as a mutual inductor. However, according to the current technology, short circuit or personnel electric shock accidents caused by misoperation can occur in the actual use process, so that equipment is damaged and personnel are injured and killed. According to the GB/T3906-91 standard, the high-voltage switch cabinet has five perfect error prevention functions: (1) the circuit breaker is prevented from being opened and closed by mistake; (2) the isolating switch is prevented from being switched on and off by mistake when the load is carried; (3) preventing people from entering the electrified interval by mistake; (4) an anti-electrification switch; (5) and the grounding switch is prevented from switching on and the power is supplied. The five-prevention method for preventing the disconnecting switch from being mistakenly switched on and off with the load is realized through a rotating shaft interlocking device of the circuit breaker.

The structure of the existing circuit breaker is disclosed by figure 1, which comprises a circuit breaker frame 1, a rotating shaft interlocking device 2, a microswitch 5 and an operating mechanism 4, wherein the microswitch 5 is connected in series in a closing loop of the circuit breaker; the breaker frame 1 comprises a pair of side plates 15 positioned at two sides, and a first partition plate 11, a second partition plate 12, a third partition plate 13 and a fourth partition plate 14 which are positioned inside the pair of side plates 15 and are sequentially arranged from left to right. The operating mechanism 4 comprises a switching-off half shaft 42 rotatably arranged between the first partition plate 11 and the second partition plate 12 and a switching-on half shaft 41 rotatably arranged between the third partition plate 13 and the fourth partition plate 14; the rotating shaft interlocking device 2 comprises a closing interlocking part 21, an opening interlocking part 22 and an interlocking rotating shaft 23 which is rotatably arranged between the second partition plate 12 and one side plate 15, the connecting position of the interlocking rotating shaft 23 of the rotating shaft interlocking device 2 and the external interlocking is arranged on the left side or the right side of the circuit breaker, the only two structures limit the installation position of the circuit breaker in the switch cabinet, namely the circuit breaker can only be installed on the left side or the right side, when a user puts forward a special requirement, the extending direction of the conventional rotating shaft interlocking device 2 cannot meet the practical application in a fixed cabinet, namely the extending direction of the rotating shaft interlocking device 2 does not extend leftwards or rightwards, and when the transmission force is pressed downwards from the upper direction of the circuit breaker, the existing circuit breaker structure is not suitable.

In view of the above-mentioned prior art, there is a need for a reasonable improvement in the structure of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a circuit breaker, its hookup location through changing pivot interlock and outside interlocking to adapt to user's special demand.

The utility model discloses a circuit breaker, which comprises a circuit breaker frame, a rotating shaft interlocking device and an operating mechanism; the operating mechanism comprises a switching-on half shaft rotatably arranged on the breaker frame, the rotating shaft interlocking device comprises a switching-on interlocking part arranged on the breaker frame and an interlocking rotating shaft rotatably arranged on the breaker frame, one end of the switching-on interlocking part is matched with the interlocking rotating shaft, and the other end of the switching-on interlocking part is matched with the switching-on half shaft; the method is characterized in that: the circuit breaker further comprises an interlocking transmission part fixedly arranged at the top of the frame, and the interlocking transmission part is used for receiving external drive to drive an interlocking rotating shaft to move so as to drive a closing interlocking part to limit a closing half shaft to realize interlocking and enable the circuit breaker to be incapable of closing.

The utility model discloses a concrete embodiment, interlock pivot including the effect, the effect is fixed to be set up in the interlock pivot and corresponding with interlock drive disk assembly's position, interlock drive disk assembly drive the effect makes the interlock pivot rotate.

In another specific embodiment of the present invention, the interlocking transmission component includes a push rod, a shaft sleeve, a return spring and a nut, one end of the push rod body of the push rod is a threaded end, the nut is fixedly disposed on the push rod body through the threaded end, the other end of the push rod body is a guide end, an action end is disposed between the guide end and the push rod body, and the action end is matched with the action member to realize rotation of the interlocking rotating shaft; the shaft sleeve is sleeved on the ejector rod body and the threaded end, the reset spring is sleeved on the ejector rod body, one end of the reset spring is abutted against the shaft sleeve, and the other end of the reset spring is abutted against the nut, so that the reset of the ejector rod is realized.

In another specific embodiment of the present invention, the acting element includes a first vertical portion and a horizontal portion, the first vertical portion is formed by bending the horizontal portion, the first vertical portion has a mounting hole, the mounting hole is used for fixing the acting element on the interlocking shaft, the horizontal portion is provided with a force-receiving portion for engaging with the acting end of the interlocking transmission member, and the force-receiving portion is offset from the axial line of the interlocking shaft.

In another specific embodiment of the present invention, the horizontal portion is bent to form a second vertical portion, and the second vertical portion presses the closing interlock member to operate the closing interlock member.

In another specific embodiment of the present invention, the second vertical portion forms a notch for the interlocking shaft to penetrate through on the side close to the first vertical portion, thereby facilitating the installation of the acting element.

In yet another specific embodiment of the present invention, the guiding end of the interlocking transmission member is shaft-shaped, a hole is formed in the stressed portion of the acting element, the guiding end can extend into the hole of the stressed portion and slide inside the stressed portion, the acting end is designed to be convex, and the lower end surface of the acting end is matched with the stressed portion to enable the rotating shaft interlocking device to act.

The present invention further provides a specific embodiment, the breaker frame includes an upper top plate located at an upper portion, the interlocking transmission member is installed on the upper top plate, the push rod extends outwards from the inside of the breaker frame through a hole formed in the upper top plate, and the upper end surface of the acting end abuts against the lower end surface of the upper top plate.

The utility model discloses a and then a concrete embodiment, the axle sleeve on set up last through-hole and lower through-hole that link up from top to bottom, the diameter of going up the through-hole be greater than down the diameter of through-hole and go up the through-hole and be provided with the step face down between the through-hole, the screw thread end of ejector pin passes down the through-hole and stretches out in the through-hole from last, and the through-hole supports to lean on the hole outside on last roof down, reset spring cover establish on the ejector pin body, one end supports to lean on the step face, and the other end supports to lean on the nut, through the position of adjusting nut on the screw thread end, adjusts reset spring's pressure, and the axle sleeve receives the effect of reset spring decurrent pressure and self gravity, and the ejector pin receives reset spring ascending.

The utility model discloses a more and a concrete embodiment, pivot interlock still including separating brake interlocking part, separating brake interlocking part's one end cooperate with the interlocking pivot, the other end cooperatees with the separating brake semi-axis that rotates the setting on the circuit breaker frame, thereby interlocking drive part receives the action of external drive interlocking pivot and then drives separating brake interlocking part and press the separating brake semi-axis and realize the interlocking and make the circuit breaker separating brake.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: through increasing interlocking transmission part in the top of separating brake interlocking part or combined floodgate interlocking part, this interlocking transmission part is stretched into the circuit breaker inside and is leaned on the cooperation with interlocking pivot from the top of frame, and the pivot interlocking when realizing that transmission power pushes down from the circuit breaker upper direction adapts to user's special demand, makes the interlocking pivot of axle interlock and outside interlocking the hookup location diversified.

Drawings

Fig. 1 is a schematic plan view of a circuit breaker in the prior art.

Fig. 2 is the plan structure schematic diagram of the circuit breaker of the present invention.

Fig. 3 is a perspective view of a closing interlock component of the circuit breaker.

Fig. 4 is a perspective view of the interlocking transmission part of the circuit breaker of the present invention.

Fig. 5 is a schematic structural diagram of the interlocking transmission member body of the interlocking transmission member of the circuit breaker of the present invention.

Fig. 6 is an exploded schematic view of the interlocking transmission member body of the interlocking transmission member of the circuit breaker of the present invention.

Fig. 7 is a perspective view of a connecting rod of an interlocking transmission part of the circuit breaker of the present invention.

Fig. 8 is a cross-sectional view of the shaft sleeve of the interlocking transmission member of the circuit breaker of the present invention.

Fig. 9 is a schematic view of an acting plate of an interlocking transmission part of the circuit breaker of the present invention.

Fig. 10 is a schematic plan view of the circuit breaker of fig. 2 with an additional opening interlock.

Fig. 11 is a perspective view of the opening interlocking part of the circuit breaker of the present invention.

In the figure: 1. the circuit breaker comprises a breaker frame, 11, a first partition plate, 12, a second partition plate, 13, a third partition plate, 14, a fourth partition plate, 15, side plates and 16, an upper top plate; 2. the locking device comprises a rotating shaft interlocking device, 21, a closing interlocking component, 211, a first fixing frame, 2111, a first upper plate, 212, a closing push rod, 213, a first pressing plate, 214, a first spring, 215, a first retaining ring, 22, an opening interlocking component, 221, a second fixing frame, 2211, a second upper plate, 222, an opening push rod, 223, a second pressing plate, 224, a second spring, 225, a second retaining ring, 23, an interlocking rotating shaft, 231, an acting element, 2311, a first vertical part, 23111, a mounting hole, 2312, a horizontal part, 23121, a stress part, 2313, a second vertical part, 23131 and a notch; 3. the interlocking transmission component comprises an interlocking transmission component 31, a connecting rod 311, a connecting rod body 312, a thread end 313, a guide end 314, an action end 32, a shaft sleeve 321, an upper through hole 321, a lower through hole 322, a step surface 323, a step surface 33, a return spring 34 and a nut; 4. the brake system comprises an operating mechanism, 41, a closing half shaft, 411, a first bent plate, 42, an opening half shaft and 421, a second bent plate; 5. a micro switch.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 2, the present invention relates to a circuit breaker, which comprises a circuit breaker frame 1, a rotating shaft interlocking device 2, and an operating mechanism 4; the breaker frame 1 comprises a pair of side plates 15 positioned at two sides, an upper top plate 16 positioned at the upper part, and a first partition plate 11, a second partition plate 12, a third partition plate 13 and a fourth partition plate 14 which are positioned inside the pair of side plates 15 and are sequentially arranged from left to right; the operating mechanism 4 comprises a switching-off half shaft 42 rotatably arranged between the first partition plate 11 and the second partition plate 12 and a switching-on half shaft 41 rotatably arranged between the third partition plate 13 and the fourth partition plate 14; the rotating shaft interlocking device 2 comprises a closing interlocking part 21 and an interlocking rotating shaft 23 which is rotatably arranged between the second partition plate 12 and the third partition plate 13; the closing interlocking part 21 is fixedly arranged on the third partition plate 13, one end of the closing interlocking part is matched with the interlocking rotating shaft 23, and the other end of the closing interlocking part is matched with the closing half shaft 41 to realize interlocking, so that the circuit breaker cannot be closed. A first bent plate 411 is arranged on the switching-on half shaft 41, and the switching-on half shaft 41 is driven by driving the first bent plate 411; the opening half shaft 42 is provided with a second bent plate 421, and the opening half shaft 42 is driven by driving the second bent plate 421.

As shown in fig. 2, the circuit breaker further includes an interlocking transmission component 3 fixedly disposed at the top of the circuit breaker frame 1 and driven by an external device, the interlocking transmission component 3 extends into the circuit breaker from the top of the frame 1 and is matched with the interlocking rotating shaft 23, one end of the interlocking transmission component is used for receiving an external acting force, and the other end of the interlocking transmission component is used for driving the interlocking rotating shaft 23 to act so as to drive the closing interlocking component 21 to limit the closing half shaft 41 to realize interlocking and enable the circuit breaker to be unable to be closed. The external device is generally an operation element such as a disconnecting switch. The interlocking rotating shaft 23 is driven to act under the action of the driving force of the external equipment so as to realize interlocking, and after the driving force of the external equipment disappears, the interlocking transmission part 3 is restored to the initial position under the action of the resetting part.

As shown in fig. 2 and 4, specifically, the interlock driving member 3 drives the interlock rotating shaft 23 by: the interlocking rotating shaft 23 comprises an acting element 231, the acting element 231 is fixedly arranged on the interlocking rotating shaft 23 and corresponds to the position of the interlocking transmission part 3, and the interlocking transmission part 3 drives the acting element 231 to enable the interlocking rotating shaft 23 to rotate. The interlocking transmission part 3 is arranged on the upper top plate 16, and the interlocking transmission part 3 drives the acting piece 231 to enable the interlocking rotating shaft 23 to rotate. As shown in fig. 9, the acting element 231 includes a first vertical portion 2311, a horizontal portion 2312 and a second vertical portion 2313, the first vertical portion 2311 and the second vertical portion 2313 are formed by bending the horizontal portion 2312, the first vertical portion 2311 is provided with a mounting hole 23111, the second vertical portion 2313 is provided with a notch 23131 near the first vertical portion 2311 for the interlocking rotating shaft 23 to penetrate, the acting element 231 is fixedly arranged on the interlocking rotating shaft 23 through the mounting hole 23111, the horizontal portion 2312 is provided with a force receiving portion 23121 for being matched with the interlocking transmission member 3, and actually, the acting point of the interlocking transmission member 3 on the force receiving portion 23121 is deviated from the axial line of the interlocking rotating shaft 23 so that the interlocking rotating shaft 23 can rotate. The second vertical portion 2313 presses the closing interlock member 21 to operate.

As shown in fig. 4 to 8, the interlocking transmission component 3 includes a push rod 31, a shaft sleeve 32, a return spring 33 and a nut 34, one end of a push rod body 311 of the push rod 31 extends to form a threaded end 312, the nut 34 is fixedly disposed on the push rod body 311 through the threaded end 312, the other end of the push rod body 311 extends to form a guide end 313, an acting end 314 is disposed between the guide end 313 and the push rod body 311, and the acting end 314 is matched with the force-receiving portion 23121 to realize the action of the interlocking rotating shaft 23. In this embodiment, the guiding end 313 is in a shaft shape, the stress part 23121 is provided with a hole, the guiding end 313 can extend into the hole of the stress part 23121 and slide therein, the acting end 314 is designed to be a protrusion, and the lower end surface of the acting end 314 is matched with the stress part 23121 to enable the rotation shaft interlocking device 2 to realize the action interlocking. For smooth sliding, the guide end 313 is designed to be a square shaft, and chamfers may be further disposed at four corners of the square shaft. The corresponding hole of the force-receiving portion 23121 is designed as a kidney-shaped hole, and the acting end 314 is designed as a ring, preferably as a circular ring, as long as the diameter of the circular ring is larger than that of the kidney-shaped hole.

With continued reference to fig. 4 to 9, the interlocking transmission member 3 is mounted on the upper top plate 16 such that the plunger 31 extends outward from the inside of the breaker frame 1 through a hole formed in the upper top plate 16, and the upper end surface of the acting end 314 abuts against the lower end surface of the upper top plate 16. The shaft sleeve 32 is sleeved on the ejector rod body 311 and the threaded end 312, the shaft sleeve 32 is provided with an upper through hole 321 and a lower through hole 322 which are vertically communicated, the diameter of the upper through hole 321 is larger than that of the lower through hole 322, a step surface 323 is arranged between the upper through hole 321 and the lower through hole 322, the threaded end 312 penetrates through the lower through hole 322 and extends out of the upper through hole 321, the lower through hole 322 abuts against the outside of a hole of the upper top plate 16, the return spring 33 is sleeved on the ejector rod body 311, one end of the return spring abuts against the step surface 323, the other end of the return spring abuts against the nut 34, the pressure of the return spring 33 can be adjusted by adjusting the position of the nut 34 on the threaded end 312, the shaft sleeve 32 is under the action of the downward pressure and the self gravity of the return spring 33, and the ejector rod 31 is under the action of the upward thrust of the return. The return spring 33 is a return component, and plays a role in fixing and mounting on one hand and a role in returning on the other hand. When the threaded end 312 of the interlocking transmission part 3 is acted by an external force, the mandril 31 moves downwards, the return spring 33 is compressed, the guide end 313 can extend into the waist-shaped hole of the stress part 23121, the lower end surface of the action end 314 is matched with the stress part 23121 of the action piece 231 to drive the action piece 231 to move, the action piece 231 drives the interlocking rotating shaft 23 to rotate, and the rotation of the interlocking rotating shaft 23 drives the rotating shaft interlocking device 2 to move to realize interlocking.

As shown in fig. 3, specifically, the closing interlocking part 21 includes a first fixing frame 211 and a closing push rod 212, the closing interlocking device 21 is disposed on the third partition plate 13 through the first fixing frame 211, the closing push rod 212 is slidably disposed on the first fixing frame 211 in an up-and-down manner, a first pressing plate 213 engaged with the interlocking rotating shaft 23 is disposed at an upper end of the closing push rod 212, and the first pressing plate 213 is engaged with an acting element 231 fixedly disposed on the interlocking rotating shaft 23 and corresponding to the interlocking transmission part 3. The closing interlocking part 21 further comprises a first spring 214 for resetting the closing interlocking part 21 and a first retainer ring 215 for limiting the closing push rod 212, the first spring 214 is sleeved on the closing push rod 212 and is positioned on one side of the first fixing frame 211 close to the lower end part, and the first retainer ring 215 is also sleeved on the closing push rod 212 and is positioned between the first upper plate 2111 at the upper end part of the first fixing frame 211 and the first pressing plate 213.

Generally, according to the requirement of five prevention, the breaker can not be switched on, and the breaker is required to be switched off. As shown in fig. 10, the rotating shaft interlocking device 2 further includes a switching-off interlocking part 22, one end of the switching-off interlocking part 22 is matched with the interlocking rotating shaft 23, the other end of the switching-off interlocking part is matched with a switching-off half shaft 42 rotatably arranged on the circuit breaker frame 1, and the interlocking transmission part 3 is driven by the outside to drive the interlocking rotating shaft 23 to move and further drive the switching-off interlocking part 22 to press the switching-off half shaft 42 to realize interlocking, so that the circuit breaker is switched off.

As shown in fig. 11, the opening interlocking part 22 further includes a second fixing frame 221 and an opening push rod 222, the opening interlocking part 22 is fixedly disposed on the second partition 12 through the second fixing frame 221, the opening push rod 222 is vertically slidably disposed on the second fixing frame 221, a second pressing plate 223 engaged with the interlocking rotating shaft 23 is disposed at an upper end of the opening push rod 222, another acting element 231 is also disposed at a position of the interlocking rotating shaft 23 close to the opening interlocking part 22, and a second vertical portion 2313 of the acting element 231 contacts and presses the second pressing plate 223 of the opening interlocking part 22 to move downward so as to trigger a working end of the micro switch 5 disposed on the second partition 12 and simultaneously drive the opening push rod 222 to move downward. The opening interlocking part 22 further comprises a second spring 224 used for resetting the opening interlocking part 22 and a second retainer ring 225 used for limiting the opening push rod 222, the second spring 224 is sleeved on the opening push rod 222 and is positioned on one side of the second fixing frame 221 close to the lower end part, and the second retainer ring 225 is also sleeved on the opening push rod 222 and is positioned between a second upper plate 2211 at the upper end part of the second fixing frame 221 and the second pressing plate 223. The microswitch 5 is connected in series in a closing loop formed by a closing electromagnet and the microswitch 5, and when the second pressing plate 223 drives the working end of the microswitch 5 to act, the closing loop is disconnected, and the electric closing cannot be performed. In the present embodiment, the interlock transmission member 3 is disposed above the frame 1 corresponding to the closing interlock member 21, but may be disposed above the frame 1 corresponding to the opening interlock member 22. As shown in fig. 10, in the present embodiment, the microswitch 5 is fixedly arranged on the second partition plate 12, and the working end of the microswitch 5 is driven by the opening interlock member 22 arranged on the second partition plate 12.

Referring to fig. 10 and fig. 11 in combination with fig. 3 to fig. 5, the working process of the circuit breaker of the present invention is as follows: the rotating shaft interlocking device 2 is in an unlocked state, and the external device does not apply a driving force to the acting member 231 to rotate the acting member, so that the circuit breaker can perform a normal operation. When an external device applies a driving force to the interlocking transmission part 3, the threaded end 312 of the interlocking transmission part 3 is acted by the driving force, the ejector rod 31 moves downwards, the return spring 33 is compressed, the guide end 313 can extend into the kidney-shaped hole of the acting element 231 close to the first pressing plate 213, the lower end surface of the acting end 314 is matched with the stressed part 23121 of the acting element 231 close to the first pressing plate 213, the driven acting element 231 close to the first pressing plate 213 rotates the interlocking rotating shaft 23, the acting element 231 close to the second pressing plate 223 fixedly arranged on the interlocking rotating shaft 23 also rotates along with the interlocking rotating shaft 23, then the acting element 231 close to the second pressing plate 223 contacts the second pressing plate 223, the second pressing plate 223 contacts and presses the working end of the microswitch 5, so that the microswitch 5 acts and drives the opening push rod 222 to move downwards, and drives the second bending plate 421 fixedly arranged on the opening rotating shaft 42 to rotate, the opening rotating shaft 42 rotates along with the opening rotating shaft, the breaker is opened, meanwhile, the microswitch 5 acts, so that the closing loop where the microswitch is located is disconnected, and the closing electromagnet connected in series in the closing loop cannot be electrified and cannot be electrically closed. In addition, the interlocking transmission part 3 drives the acting element 231 fixedly arranged on the interlocking rotating shaft 23 and close to the first pressing plate 213 side, the second vertical part 2313 of the acting element 231 close to the first pressing plate 213 side touches and presses the first pressing plate 213 to move downwards, the first pressing plate 213 drives the closing push rod 212 to move downwards, so that the lower end of the closing push rod 212 is positioned on a path through which the first bending plate 411 fixedly arranged on the closing half shaft 41 needs to pass in the closing process of the circuit breaker, the closing half shaft 41 cannot rotate, and the circuit breaker cannot be manually closed at this time. When the driving force applied by the external device disappears, the closing interlocking part 21 and the opening interlocking part 22 of the rotating shaft interlocking device 2 are respectively reset under the action of the first spring 214 and the second spring 224 and return to the unlocking state. The jack 31 is also restored to the initial position by the return spring 33.

Claims

1. A circuit breaker comprises a circuit breaker frame (1), a rotating shaft interlocking device (2) and an operating mechanism (4); the operating mechanism (4) comprises a closing half shaft (41) rotatably arranged on the breaker frame (1), the rotating shaft interlocking device (2) comprises a closing interlocking part (21) arranged on the breaker frame (1) and an interlocking rotating shaft (23) rotatably arranged on the breaker frame (1), one end of the closing interlocking part (21) is matched with the interlocking rotating shaft (23), and the other end of the closing interlocking part is matched with the closing half shaft (41); the method is characterized in that: the circuit breaker further comprises an interlocking transmission part (3) fixedly arranged at the top of the frame (1), and the interlocking transmission part (3) is used for receiving external drive to drive an interlocking rotating shaft (23) to act so as to drive a closing interlocking part (21) to limit a closing half shaft (41) to realize interlocking and enable the circuit breaker to be incapable of closing.

2. A circuit breaker according to claim 1, characterized in that said interlocking rotating shaft (23) comprises an acting element (231), said acting element (231) is fixedly arranged on the interlocking rotating shaft (23) and corresponds to the position of the interlocking transmission part (3), said interlocking transmission part (3) drives said acting element (231) to rotate the interlocking rotating shaft (23).

3. The circuit breaker according to claim 2, wherein the interlocking transmission member (3) comprises a push rod (31), a shaft sleeve (32), a return spring (33) and a nut (34), one end of a push rod body (311) of the push rod (31) is a threaded end (312), the nut (34) is fixedly arranged on the push rod body (311) through the threaded end (312), the other end of the push rod body (311) is a guide end (313), an action end (314) is arranged between the guide end (313) and the push rod body (311), and the action end (314) is matched with the action member (231) to realize the rotation of the interlocking rotating shaft (23); the shaft sleeve (32) is sleeved on the ejector rod body (311) and the threaded end (312), the reset spring (33) is sleeved on the ejector rod body (311), one end of the reset spring abuts against the shaft sleeve (32), the other end of the reset spring abuts against the nut (34), and reset of the ejector rod (31) is achieved.

4. The circuit breaker according to claim 3, wherein the acting element (231) comprises a first vertical portion (2311) and a horizontal portion (2312), the first vertical portion (2311) is formed by bending the horizontal portion (2312), the first vertical portion (2311) is provided with a mounting hole (23111), the acting element (231) is fixedly arranged on the interlocking rotating shaft (23) through the mounting hole (23111), the horizontal portion (2312) is provided with a stress portion (23121) for being matched with the acting end (314) of the interlocking transmission member (3), and the stress portion (23121) is deviated from the axial lead of the interlocking rotating shaft (23).

5. The circuit breaker according to claim 4, wherein said horizontal portion (2312) is bent to form a second vertical portion (2313), and said second vertical portion (2313) presses said closing interlock member (21) to operate.

6. A disconnector according to claim 5, characterized in that the second vertical part (2313) is provided with a notch (23131) near the first vertical part (2311) for the passage of the interlocking shaft (23) for facilitating the mounting of the acting element (231).

7. A circuit breaker according to claim 6, characterized in that the guiding end (313) of the interlocking transmission member (3) is shaft-shaped, the force-receiving portion (23121) of the acting element (231) is provided with a hole, the guiding end (313) can be inserted into the hole of the force-receiving portion (23121) and can slide therein, the acting end (314) is designed to be convex, and the lower end surface of the acting end (314) is matched with the force-receiving portion (23121) to actuate the rotating shaft interlocking device (2).

8. A circuit breaker according to claim 7, characterized in that said circuit breaker frame (1) comprises an upper top plate (16) at the upper part, said interlocking transmission member (3) is mounted on the upper top plate (16), said plunger (31) extends outwards from the interior of the circuit breaker frame (1) through a hole provided in the upper top plate (16), and the upper end surface of said action end (314) abuts against the lower end surface of the upper top plate (16).

9. The circuit breaker according to claim 8, characterized in that the shaft sleeve (32) is provided with an upper through hole (321) and a lower through hole (322) which are vertically through, the diameter of the upper through hole (321) is larger than that of the lower through hole (322), a step surface (323) is arranged between the upper through hole (321) and the lower through hole (322), the threaded end (312) of the ejector rod (31) passes through the lower through hole (322) and extends out of the upper through hole (321), the lower through hole (322) abuts against the outside of the hole on the upper top plate (16), the return spring (33) is sleeved on the ejector rod body (311), one end of the return spring abuts against the step surface (323), the other end of the return spring abuts against the nut (34), the pressure of the return spring (33) is adjusted by adjusting the position of the nut (34) on the threaded end (312), and the shaft sleeve (32) is acted by the downward pressure and the self gravity of the return spring (33), and the push rod (31) is pushed upwards by a return spring (33), so that the shaft sleeve (32) and the push rod (31) are tightly abutted against the upper top plate (16).

10. The circuit breaker according to claim 1, characterized in that the rotating shaft interlocking device (2) further comprises a tripping interlocking part (22), one end of the tripping interlocking part (22) is matched with the interlocking rotating shaft (23), the other end of the tripping interlocking part is matched with a tripping half shaft (42) rotatably arranged on the circuit breaker frame (1), and the interlocking transmission part (3) is driven by the outside to drive the interlocking rotating shaft (23) to act so as to drive the tripping interlocking part (22) to press the tripping half shaft (42) to realize interlocking and enable the circuit breaker to trip.