Combined switch circuit breaker and mechanical interlocking device between its three positions
By designing a five-proof interlocking mechanical interlocking device in a combined switch circuit breaker, the existing circuit breaker and three-work are solved by using the structure of arc-shaped slide grooves and rod holes combined with isolation, grounding operation shaft and interlocking slider. The problem of poor design of the position interlocking device achieves higher safety and stability, and prevents misoperation and accidents.
Patent Information
- Application Number
- CN202010466844.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-05-28
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2040-05-28
AI Technical Summary
The interlocking device between the existing circuit breaker mechanism and the three workstations is difficult to effectively prevent misoperation in the combined switch, resulting in safety accidents, and poor design leads to poor interlocking effect.
A five-proof interlocking combined switch circuit breaker and its mechanical interlocking device between three workstations is designed. By setting arc-shaped slide grooves and rod holes on the three workstation discs, combining the isolation operation shaft, the ground operation shaft and The structure of the interlocking slide plate realizes mechanical interlocking of the circuit breaker opening, closing and three workstations, ensuring that the three workstations can only be operated in a specific state, and the interlocking slide plate is allowed to slide up and down when the panel lock is opened.
It effectively prevents the circuit breaker from operating in non-emergency conditions, improves safety and stability, ensures the reliability and simplicity of operation, and is suitable for combining the switch circuit breaker and its mechanical interlocking device between the three workstations. Especially used as a five-proof interlocking device.
Smart Images
Figure CN111768992B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a circuit breaker operating mechanism, which is a combined switch circuit breaker and a mechanical interlocking device between three working positions thereof. Background Art
[0002] The operating mechanism of the circuit breaker is generally a spring operating mechanism, which is used as a control mechanism for the opening and closing of the high-voltage switch. In the traditional spring operating mechanism, since there is no closing interlocking device, it is easy to cause misoperation, which will lead to the occurrence of safety accidents in serious cases. In order to solve the above problems, the existing spring operating mechanism generally sets a corresponding closing interlocking device in the closing mechanism to prevent the closing again, effectively avoiding safety accidents. The interlocking device between the existing circuit breaker mechanism and the three-position mechanism, such as the application number 201710624948.8 published in the Chinese patent literature, the application publication date is 2017.11.07, and the invention name is "a circuit breaker mechanism and a three-position mechanism interlocking device"; another example is the application number 201710080376.1 published in the Chinese patent literature, the application publication date is 2017.05.10, and the invention name is "a mechanical interlocking structure between a circuit breaker and a three-position mechanism". However, the above device is difficult to use in the combination switch circuit breaker. The interlocking device designed between the existing combination switch circuit breaker and the three-station is still prone to erroneous operation during the operation and maintenance of the solid ring network cabinet, resulting in accidents. Summary of the invention
[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a combination switch circuit breaker with five-protection interlocking and a mechanical interlocking device between three working positions in the art, so as to solve the technical problems that the existing similar products lack the five-protection interlocking structure design and the poor interlocking effect caused by the poor structural design of the interlocking device. The purpose is achieved through the following technical solution.
[0004] A combination switch circuit breaker and a mechanical interlocking device between three working positions thereof. The center of the three-position disk of the interlocking device is arranged on a three-position operating mechanism through a disk shaft. Arc-shaped slide grooves are arranged on both sides of the three-position disk. Rod holes larger than the width of the arc-shaped slide grooves are arranged at both ends of the arc-shaped slide grooves. An isolation operating shaft and a grounding operating shaft (4) are arranged on the three-position operating mechanism below the arc-shaped slide grooves of the three-position disk. Ratchets are arranged at the outer diameters of the ends of the isolation operating shaft and the grounding operating shaft. Three working positions of grounding, closing and opening are arranged at both ends of the arc-shaped slide grooves of the three-position disk. Therefore, when the isolation operating shaft and the grounding operating shaft are aligned with the two rod holes of the arc-shaped slide grooves of the three-position disk, the crank handle is inserted into the ratchets of the isolation operating shaft and the grounding operating shaft to operate the rotation of the corresponding isolation operating shaft and the grounding operating shaft. The key points of its structural design are that a raised boss is provided on one side of the outer diameter of the three-station disk, and the boss of the three-station disk is abutted against or disengaged from the first limit block at one end of the three-station interlocking plate, and the first limit block is arranged at the bottom of the three-station interlocking plate, and the other end of the three-station interlocking plate is provided with an isolation operation shaft hole and a grounding operation shaft hole, and one end of the first limit block of the three-station interlocking plate is connected to the interlocking slide plate as a whole, and the two ends of the interlocking slide plate are arranged on the front side plate below the three-station operating mechanism through fixing pins, and the interlocking slide plates at the fixing pins are respectively provided with special-shaped holes that slide up and down, and an interlocking sleeve is provided in the middle between the two ends of the interlocking slide plate, and milling edges are symmetrically provided on both sides of one end of the interlocking sleeve, and an 8-shaped hole is provided on the front side plate surface of one end of the interlocking plate, and round holes on both sides of the 8-shaped hole A transition hole is provided between the 8-shaped holes, the milling edge distance of the interlocking sleeve is smaller than the transition hole, the arc edge distance on both sides of the interlocking sleeve is larger than the transition hole and smaller than the circular hole, the other end of the interlocking plate is bent and fixed to the front side plate, the milling edge of the interlocking sleeve is inserted into the 8-shaped hole of the interlocking plate and is provided with a pin shaft for limiting the 8-shaped hole, a second limit block is fixed to the end of the interlocking slide plate on the other side symmetrical to the first limit block, the second limit block, the interlocking sleeve and the pin shaft are riveted and fixed to the interlocking slide plate respectively, the second limit block of the interlocking slide plate is against the outer diameter of the closing and splitting interlocking plate, the center of the closing and splitting interlocking plate is set on the output shaft, a raised lug is provided on the outer diameter of one side edge of the closing and splitting interlocking plate, and a convex rod is provided on the outer diameter of the other side edge of the closing and splitting interlocking plate symmetrical to the lug. Thus, the interlocking slide passes through the transition hole between the circular holes on both sides of the 8-shaped hole of the interlocking plate through the milling edge of the interlocking sleeve, and the interlocking slide is located in the circular holes on both sides of the 8-shaped hole of the interlocking plate through the arc edges on both sides of the milling edge of the interlocking sleeve. The functions of the interlocking device are mainly reflected as follows: 1. The three-position can only be operated when the circuit breaker is in the open state, and the three-position cannot be operated when the circuit breaker is closed; 2. The circuit breaker cannot be closed when the three-position grounding is open or isolated, and the circuit breaker can only be closed when the grounding is closed or isolated; 3. The interlocking slide can only be slid up and down when the panel lock is opened.
[0005] The pin extends out of the interlocking sleeve and is provided with a panel lock, so that the pin is installed with the panel lock, and the interlocking sleeve can be rotated only when the panel lock is opened, so that the pin drives the interlocking sleeve to rotate.
[0006] One side of the interlocking slide plate is provided with an L-shaped end bent toward the front side plate, and a limiting screw sleeve is provided inside the L-shaped end of the interlocking slide plate, and the limiting screw sleeve is connected to one end of the closing release plate through a closing half-shaft, and the closing half-shaft extends out of the front side plate, and a limiting set screw is provided on the front side plate outside the other end of the closing release plate. Thus, while the limiting screw sleeve is limited by the L-shaped end of the interlocking slide plate, the closing half-shaft is driven by the closing release plate to realize linkage, and the closing release plate is limited by the set screw.
[0007] The shaft of the closing release plate is inserted into the shaft hole of the closing half shaft, the limiting screw sleeve is arranged at one end of the shaft of the closing release plate, the other end of the shaft of the closing release plate is provided with a plate portion tilted toward the set screw, and one side of the plate portion of the closing release plate is provided with a triangular hook portion protruding toward the set screw. The above structure is a specific structure of the closing release plate, which facilitates the assembly and limiting of the closing release plate, the closing half shaft, and the limiting screw sleeve.
[0008] The first limit block and the second limit block are cylindrical blocks respectively, and the triangular end of the interlocking slide plate at the first limit block is provided with a corresponding arc groove. The above structure facilitates the first limit block and the second limit block to correspond to the boss of the three-position disk, the arc groove of the interlocking slide plate, the outer diameter edge of the closing and opening interlocking plate, and the lug and convex rod of the outer diameter of the closing and opening interlocking plate, respectively, to achieve corresponding linkage and operation.
[0009] The three-station interlocking plate is L-shaped, and the bending part of the three-station interlocking plate is arranged in the arc-shaped slide groove of the three-station plate through the isolation operation shaft hole and the grounding operation shaft hole arranged side by side up and down, and the isolation operation shaft and the grounding operation shaft (4) of the three-station operating mechanism are arranged side by side up and down. The above structure saves the manufacturing loss of the three-station interlocking plate, that is, saves the production cost, and stabilizes the center of gravity of the three-station interlocking plate and the interlocking slide plate.
[0010] The first limit block of the three-station interlocking plate has a symmetrical side bending end provided with a limit end bent toward the front side plate, and the limit end of the three-station interlocking plate is located above the front side plate and outside the isolation operating shaft and the grounding operating shaft (4). Thus, the isolation operating shaft and the grounding operating shaft are further protected by the limit end of the three-station interlocking plate, preventing the corresponding operating shaft from exposing the three-station interlocking plate when in the corresponding position.
[0011] One end of the interlocking slide plate's special-shaped hole is a round hole, and the other end of the interlocking slide plate's special-shaped hole is a waist-shaped hole, the waist-shaped hole is connected to the round hole, and the diameter of the round hole is greater than the width of the waist-shaped hole. The above structural plate is convenient for loading and unloading the interlocking slide plate, and the waist-shaped hole allows the interlocking slide plate to slide up and down.
[0012] The invention has reasonable structural design, safe and reliable interlocking and linkage structure, good stability and safety, and simple operation; it is suitable for use as a mechanical interlocking device between a combination switch circuit breaker and three workstations thereof, especially as the above-mentioned five-protection interlocking device, or as a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the circuit breaker in the open state, the three-position grounding open and the isolation open position structure of the present invention.
[0014] Figure 2 yes Figure 1 Schematic diagram of the right view structure.
[0015] Figure 3 It is a schematic diagram of the circuit breaker in the open state, three-position isolation closed and grounding closed positions of the present invention.
[0016] Figure 4 It is a schematic diagram of the circuit breaker closing state of the present invention, and the three-position isolation closing and grounding closing position structure.
[0017] Figure 5 yes Figure 1 Schematic diagram of part of the structure.
[0018] Figure 6 yes Figure 5 Schematic diagram of the left three-dimensional structure.
[0019] Figure 7 yes Figure 5 The three-dimensional structure schematic diagram on the right side of the figure shows an enlarged part.
[0020] Figure 8 yes Figure 1 Schematic diagram of the right side structure of the three-station interlocking plate.
[0021] Fig. 9 yes Figure 1 Schematic diagram of the rear structure of the three-station interlocking plate.
[0022] Fig.10 yes Figure 5 Schematic diagram of part of the structure.
[0023] Fig.11 yes Fig.10 Schematic diagram of the right view structure.
[0024] Fig.12 yes Fig.10 Schematic diagram of the three-dimensional structure on the right.
[0025] Fig.13 yes Figure 3 A schematic diagram of the interlocking plate structure is shown, in which the pin shaft and the interlocking sleeve are partially cut away.
[0026] The names of the serial numbers in the figure are: 1. three-position turntable, 101. boss, 2. isolation operating shaft, 3. three-position interlocking plate, 4. grounding operating shaft, 5. first limit block, 6. fixing pin, 7. interlocking slide plate, 701. L-shaped end, 8. pin shaft, 9. interlocking plate, 10. interlocking shaft sleeve, 11. limiting screw sleeve, 12. closing half shaft, 13. second limit block, 14. closing release plate, 15. closing and opening interlocking plate, 16. output shaft, 17. front side plate. DETAILED DESCRIPTION
[0027] Now, the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 13 As shown, the center of the three-position disk 1 of the interlocking device is set on the three-position operating mechanism through the disk shaft, and arc-shaped slide grooves are provided on both sides of the three-position disk, and rod holes larger than the width of the arc-shaped slide grooves are respectively provided at both ends of the arc-shaped slide grooves. The three-position operating mechanism is provided with an isolation operating shaft 2 and a grounding operating shaft 4 below the arc-shaped slide groove of the three-position disk, and ratchets are respectively provided on the outer diameters of the ends of the isolation operating shaft and the grounding operating shaft, and three working positions of grounding, closing and opening are provided at both ends of the arc-shaped slide groove of the three-position disk. Its specific structure is as follows: a raised boss is provided on one side of the outer diameter of the three-station disk, the boss of the three-station disk abuts against or disengages from the first limit block 5 at one end of the three-station interlocking plate 3, the first limit block is arranged at the bottom of the three-station interlocking plate, the other end of the three-station interlocking plate is provided with an isolation operation shaft hole and a grounding operation shaft hole, one end of the first limit block of the three-station interlocking plate is connected with the interlocking slide plate 7 as a whole, the two ends of the interlocking slide plate are arranged on the front side plate 17 below the three-station operating mechanism through a fixing pin 6, and the interlocking slide plate at the fixing pin is respectively provided with a special-shaped hole for sliding up and down. One end of the special-shaped hole is a round hole, and the other end of the special-shaped hole of the interlocking slide plate is a waist-shaped hole, the waist-shaped hole is connected with the round hole, and the diameter of the round hole is greater than the width of the waist-shaped hole. An interlocking sleeve 10 is provided in the middle between the two ends of the interlocking slide plate, and milling edges are symmetrically provided on both sides of one end of the interlocking sleeve. An 8-shaped hole is provided on the front side plate surface of one end of the interlocking plate 9, and a transition hole is provided between the circular holes on both sides of the 8-shaped hole. The milling edge distance of the interlocking sleeve is smaller than the transition hole, and the arc edge distance on both sides of the interlocking sleeve is larger than the transition hole and smaller than the circular hole. The other end of the interlocking plate is bent and fixed to the front side plate, and the milling edge of the interlocking sleeve is inserted into the 8-shaped hole of the interlocking plate and provided with a pin 8 for limiting the 8-shaped hole. A second limit block 13 is fixedly provided at the end of the interlocking slide plate on the other side symmetrical to the first limit block, and the second limit block, the interlocking sleeve, and the pin are riveted and fixed to the interlocking slide plate respectively. The second limit block of the interlocking slide plate is against the outer diameter of the closing and opening interlocking plate 15, and the center of the closing and opening interlocking plate is set on the output shaft 16. A raised lug is provided on the outer diameter of one side edge of the closing and opening interlocking plate, and a convex rod is provided on the outer diameter of the other side edge of the closing and opening interlocking plate symmetrical to the lug.
[0028] One side of the interlocking slide is provided with an L-shaped end 701 bent toward the front side plate, and a limiting screw sleeve 11 is provided inside the L-shaped end of the interlocking slide. The limiting screw sleeve is connected to one end of the closing release plate 14 through the closing half-shaft 12. The closing half-shaft extends out of the front side plate, and a limiting set screw is provided on the front side plate outside the other end of the closing release plate. The shaft of the closing release plate is inserted into the shaft hole of the closing half-shaft, and the limiting screw sleeve is arranged at one end of the shaft of the closing release plate. The other end of the shaft of the closing release plate is provided with a plate portion tilted toward the set screw, and one side of the plate portion of the closing release plate is provided with a triangular hook portion protruding toward the set screw. The first limiting block and the second limiting block are cylindrical blocks respectively, and a corresponding arc groove is provided at the triangular end of the interlocking slide at the first limiting block. The three-station interlocking plate is L-shaped, and the bending part of the three-station interlocking plate is set in the arc-shaped slide groove of the three-station disk through the isolation operation shaft hole and the grounding operation shaft hole arranged side by side up and down. The isolation operation shaft and the grounding operation shaft of the three-station operating mechanism are correspondingly arranged side by side up and down. The bending end of the first limit block of the three-station interlocking plate is symmetrically provided with a limit end bent toward the front side plate. The limit end of the three-station interlocking plate is located above the front side plate and outside the isolation operation shaft and the grounding operation shaft. The above-mentioned pin shaft extends out of the interlocking shaft sleeve and a panel lock can also be set.
[0029] The interlocking device belongs to the mechanical principle in the mechanical high-voltage switch industry. The interlocking device includes various interlocking plates, interlocking slides, interlocking pins, interlocking sleeves, and limit blocks. The interlocking between the circuit breaker and the three stations is achieved by sliding the interlocking slides up and down. The functions of the interlocking device are as follows: a. When the three-station is in isolation and grounding, the two holes of the three-station interlocking plate are just aligned with the isolation operating shaft and the grounding operating shaft. At this time, the three-station is operated normally. At this time, there is a raised boss on the outer edge of the three-station turntable, which just contacts the first limit block installed on the three-station interlocking plate. The three-station interlocking plate is installed on the interlocking slide, so the interlocking slide cannot move up, and the limiting screw sleeve on the closing half-axis at the bend of the interlocking slide moves, so that the closing half-axis cannot rotate, and the circuit breaker cannot be closed. At this time, the three-station is operated; b. When the three-station is in isolation and grounding, the three-station turntable rotates, and the boss on the edge of the turntable leaves the first limit block. At this time, the panel lock is unlocked, and the interlocking sleeve is rotated. The milling edge of the interlocking sleeve is flush with the 8-shaped hole on the interlocking plate. The interlocking plate is fixed on the front side plate. The interlocking sleeve on the interlocking slide is manually pulled to make the interlocking slide press The special-shaped hole slides up and down, and when the interlocking slide plate slides to the top, the interlocking sleeve is rotated to prevent the interlocking slide plate from sliding down. At this time, half of the three-position interlocking plate blocks the isolation operating shaft and the grounding operating shaft. At this time, the handle cannot be inserted, and the three-position cannot be operated at this time; after the interlocking slide plate slides to the top, the bending part of the interlocking slide plate leaves the limiting screw sleeve on the closing half-shaft. At this time, the closing half-shaft is rotated so that the circuit breaker can be closed normally; c. According to the above steps, the three-position is in isolation closing and grounding closing. When the circuit breaker is closed, the head of the separation and closing interlocking plate is against the second limit block on the interlocking slide plate. No matter how the interlocking sleeve is rotated to unlock, the interlocking slide plate cannot slide down, and the two holes of the three-position interlocking plate cannot be aligned with the isolation operating shaft and the grounding operating shaft, so the three-position mechanism cannot be operated; d. After the above steps, only when the circuit breaker is opened, the head of the separation and closing interlocking plate leaves the second limit block. At this time, the interlocking slide plate is slid up and down to continue the above operations.
[0030] In summary, the three-position turntable, isolation operating shaft, and grounding operating shaft of the interlocking device are fixedly installed on the three-position operating mechanism. There is a boss on the round edge of the three-position turntable for the interlocking slide. The position changes of each position of the three positions are identified by rotating the isolation operating shaft or the grounding operating shaft to drive the turntable to rotate. The closing trip plate is fixed on the closing half-shaft and installed on the front side plate. The limit screw sleeve is fixed on the closing trip plate. The closing half-shaft is driven by pushing the closing trip plate to close the circuit breaker. The first limit block is fixed on the three-position interlocking plate. The first limit block is interlocked with the boss on the edge of the three-position turntable. The three-position interlocking plate is fixed on the interlocking slide to realize the up and down sliding of the interlocking slide. The interlocking slide is provided with a special-shaped hole that can slide up and down to open or block the isolation or grounding operating shaft. The interlocking sleeve is mounted on the pin shaft, and the interlocking sleeve, the pin shaft, and the second limit block are riveted to the interlocking slide plate respectively. The interlocking sleeve rotates on the pin shaft, and there is a small hole for centering when rotating. The panel lock is installed, and the interlocking sleeve can only be rotated when the panel lock is opened; the second limit block is riveted on the interlocking slide plate and together with the closing and opening interlocking plate, locks the interlocking slide plate so that the interlocking slide plate cannot fall. The interlocking plate is fixed to the front side plate, and the 8-shaped hole of the interlocking plate and the interlocking sleeve play an interlocking role to prevent the interlocking slide plate from sliding up and down when the circuit breaker is in the open state. The closing and opening interlocking plate is assembled on the output shaft and rotates together during the closing and opening process of the circuit breaker. When the circuit breaker is closed, it contacts the second limit block, so that the interlocking slide plate cannot fall, which plays the role of making it impossible to operate the three-position after the circuit breaker is closed.
Claims
1. A combination switch circuit breaker and a mechanical interlocking device between three working positions thereof, wherein the center of a three-position disk (1) of the interlocking device is arranged on a three-position operating mechanism through a disk shaft, arc-shaped slide grooves are arranged on both sides of the three-position disk, and rod holes larger than the width of the arc-shaped slide grooves are arranged at both ends of the arc-shaped slide grooves, and the three-position operating mechanism is provided with an isolation operating shaft (2) and a grounding operating shaft (4) below the arc-shaped slide groove of the three-position disk, and ratchets are arranged on the outer diameters of the ends of the isolation operating shaft and the grounding operating shaft, respectively, and three working positions of grounding, closing and opening are arranged at both ends of the arc-shaped slide groove of the three-position disk; characterized in that The three-station disc (1) is provided with a raised boss on one side of the outer diameter, and the boss of the three-station disc abuts against or disengages from a first limit block (5) at one end of the three-station interlocking plate (3). The first limit block is arranged at the bottom of the three-station interlocking plate, and the other end of the three-station interlocking plate is provided with an isolation operation shaft hole and a grounding operation shaft hole. One end of the first limit block of the three-station interlocking plate is connected to an interlocking slide plate (7) as a whole, and the two ends of the interlocking slide plate are arranged on a front side plate (17) below the three-station operating mechanism through a fixing pin (6). The interlocking slide plate at the fixing pin is respectively provided with a special-shaped hole for sliding up and down, and an interlocking sleeve (1) is arranged in the middle between the two ends of the interlocking slide plate. 0), milling edges are symmetrically arranged on both sides of one end of the interlocking sleeve, an 8-shaped hole is arranged on the front side plate surface of one end of the interlocking plate (9), and a transition hole is arranged between the circular holes on both sides of the 8-shaped hole, the milling edge distance of the interlocking sleeve is smaller than the transition hole, the arc edge distance on both sides of the interlocking sleeve is larger than the transition hole and smaller than the circular hole, the other end of the interlocking plate is bent and fixed to the front side plate, the milling edge of the interlocking sleeve is inserted into the 8-shaped hole of the interlocking plate and is provided with a pin shaft (8) for limiting the 8-shaped hole, a second limit block (13) is fixedly arranged on the end of the interlocking slide plate on the other side symmetrical to the first limit block, the second limit block, the interlocking sleeve, and the pin shaft are respectively riveted and fixed to the interlocking The slide plate, the second limit block of the interlocking slide plate abuts against the outer diameter of the closing / opening interlocking plate (15), the center of the closing / opening interlocking plate is arranged on the output shaft (16), a raised lug is provided on the outer diameter of one side edge of the closing / opening interlocking plate, and a convex rod is provided on the outer diameter of the other side edge of the closing / opening interlocking plate symmetrical to the lug; one side of the interlocking slide plate (7) is provided with an L-shaped end (701) bent toward the front side plate (17), a limit screw sleeve (11) is provided on the inner side of the L-shaped end of the interlocking slide plate, the limit screw sleeve is connected to one end of the closing / opening release plate (14) through a closing half shaft (12), the closing half shaft extends out of the front side plate, and a limit screw sleeve is provided on the outer side of the other end of the closing / opening release plate The closing and tripping plate (14) is provided with a shaft rod inserted into the shaft hole of the closing half shaft (12); a limit screw sleeve (11) is arranged at one end of the shaft rod of the closing and tripping plate; the other end of the shaft rod of the closing and tripping plate is provided with a plate portion tilted toward the locking screw; one side of the plate portion of the closing and tripping plate is provided with a triangular hook portion protruding toward the locking screw; the three-position interlocking plate (3) is L-shaped; the bending part of the three-position interlocking plate is arranged in the arc-shaped slide groove of the three-position plate (1) through an isolation operation shaft hole and a grounding operation shaft hole arranged side by side up and down; and the isolation operation shaft (2) and the grounding operation shaft (4) of the three-position operating mechanism are arranged side by side up and down correspondingly.
2. The combination switch circuit breaker and the mechanical interlocking device between the three working positions according to claim 1, characterized in that The pin shaft (8) extends out of the interlocking shaft sleeve (10) and is provided with a panel lock.
3. The combination switch circuit breaker and the mechanical interlocking device between the three working positions according to claim 1, characterized in that The first limit block (5) and the second limit block (13) are cylindrical blocks respectively, and a corresponding arc groove is provided at the triangular end of the interlocking slide plate (7) at the first limit block.
4. The combination switch circuit breaker and the mechanical interlocking device between the three working positions according to claim 1, characterized in that The first limit block (5) of the three-station interlocking plate (3) is provided with a limit end bent toward the front side plate (17) at a symmetrically bent end on one side. The limit end of the three-station interlocking plate is located above the front side plate and outside the isolation operating shaft (2) and the grounding operating shaft (4).
5. The combination switch circuit breaker and the mechanical interlocking device between the three working positions according to claim 1, characterized in that One end of the special-shaped hole of the interlocking slide plate (7) is a round hole, and the other end of the special-shaped hole of the interlocking slide plate is a waist-shaped hole, the waist-shaped hole is connected to the round hole, and the diameter of the round hole is greater than the width of the waist-shaped hole.