Interlocking system of three-station mechanism

Abstract

The invention discloses an interlocking system of a three-station mechanism, and relates to the technical field of high-voltage switch cabinets, the interlocking system comprises a three-station switch, a box body, a circuit breaker, an interlocking unit and a front lower door, the interlocking unit is located at one side in the box body, and the interlocking unit is matched with the front lower door through a first limiting unit and is used for limiting the front lower door; the circuit breaker is located on the other side in the box body, and one end of the circuit breaker is matched with the interlocking unit through a second limiting unit and used for limiting the interlocking unit; the other end of the circuit breaker is matched with the three-position switch through a third limiting unit and is used for limiting the three-position switch; the three-position switch is matched with the interlocking unit through the fourth limiting unit and is used for limiting the interlocking unit; and a mechanical unlocking unit in transmission connection with the circuit breaker is also arranged in the box body and is used for changing the opening and closing states of the circuit breaker. Mechanical unlocking of the interlocking system is carried out through the independent mechanical unlocking unit, an electromagnet of an electrical part does not need to be used, the load of the electromagnet is reduced, and safety problems are not prone to occurring.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, and in particular to an interlocking system with a three-position mechanism. Background Technology

[0002] Circuit breakers and three-position switches are two types of switching devices used together in power transmission circuits. Due to the differences in their characteristics and functions, in practical applications, circuit breakers and three-position switches must have a certain relative opening and closing relationship; otherwise, malfunctions will occur, resulting in significant losses.

[0003] The specific relative opening and closing relationship between the circuit breaker and the three-position switch is achieved through the interlocking device between the circuit breaker and the three-position switch. This interlocks the operation between the circuit breaker and the three-position switch to ensure that there is a specific opening and closing relationship between them. Traditional interlocking devices have a complex structure, and both the electrical part and the operation interlocking device part are operated by electromagnets. The two parts share the same electromagnet, which can cause a short circuit in the electromagnet during actual operation, leading to the electromagnet burning out and affecting the operation of the entire mechanism, thus causing safety problems. Summary of the Invention

[0004] In view of this, the present invention provides an interlocking system for a three-station mechanism to solve the problems mentioned in the background art, and specifically discloses the following:

[0005] A three-position interlocking system includes a three-position switch, a housing, a circuit breaker, an interlocking unit, and a front lower door. The three-position switch is located at the top of the housing, and the front lower door is located at the bottom of the housing.

[0006] The interlocking unit is located inside the box on one side. The interlocking unit cooperates with the front lower door through the first limiting unit to limit the front lower door.

[0007] The circuit breaker is located inside the enclosure on the other side. One end of the circuit breaker cooperates with the interlocking unit through a second limiting unit to limit the interlocking unit; the other end of the circuit breaker cooperates with the three-position switch through a third limiting unit to limit the three-position switch.

[0008] The three-position switch cooperates with the interlocking unit through the fourth limiting unit to limit the interlocking unit;

[0009] The enclosure is also equipped with a mechanical unlocking unit that is connected to the circuit breaker for changing the circuit breaker's opening and closing states.

[0010] Furthermore, the interlocking unit includes an operating component and a vertical connecting rod. A second mounting plate is vertically fixed on the right side inside the housing, and a first fixing plate is fixed on the bottom right side of the second mounting plate. The operating component is provided with a first vertical sliding groove, and a first bolt is provided on the right side of the first fixing plate. The operating component and the first fixing plate are slidably connected through the cooperation of the first vertical sliding groove and the first bolt.

[0011] The vertical connecting rod is provided with a second vertical sliding groove, and a second bolt is provided vertically on the right side of the second mounting plate. The vertical connecting rod and the second mounting plate are slidably connected by the second vertical sliding groove and the second bolt.

[0012] The top of the housing is provided with an interlocking hole for the top end of the vertical connecting rod to extend into. A limiting plate is fixedly provided at the bottom right side of the second mounting plate. The limiting plate is provided with a vertical limiting groove. An operating handle is fixedly connected to the front end of the operating component, and the rear end passes through the vertical limiting groove and is fixedly connected to the bottom end of the vertical connecting rod.

[0013] Furthermore, the first limiting unit includes a lower transverse slide and a first connecting rod. The lower transverse slide is provided with a first transverse sliding groove, and the bottom of the box is provided with a third bolt. The lower transverse slide and the box are slidably connected by the first transverse sliding groove and the third bolt.

[0014] One end of the first connecting rod is hinged to the right side of the operating component, and the other end is hinged to the top of the lower transverse slide. A lower stop block is fixedly provided at the bottom of the lower transverse slide, and the front lower door is provided with a groove that matches the lower stop block.

[0015] Furthermore, the second limiting unit includes a first rotating shaft and a second connecting rod. The first rotating shaft is rotatably disposed inside the lower part of the housing. A first mounting plate is vertically fixedly disposed on the left side inside the housing. The circuit breaker is rotatably connected to the left side of the first mounting plate. A crank arm is fixedly sleeved on the rotating shaft near the operating component. The crank arm is used to limit the operating component. A connecting sleeve is fixedly sleeved on the end of the rotating shaft away from the crank arm. One end of the second connecting rod is hinged to the connecting sleeve, and the other end is hinged to the circuit breaker.

[0016] Furthermore, the third limiting unit includes a limiting slider, the limiting slider is provided with a third vertical sliding groove, and the left side of the first mounting plate is provided with a fourth bolt. The limiting slider and the first mounting plate are slidably connected by the third vertical sliding groove and the fourth bolt. The three-position switch includes a three-position operation panel located at the top of the housing, and the bottom of the three-position operation panel is provided with a three-position limiting hole for the top of the limiting slider to extend into.

[0017] The circuit breaker is provided with a limiting bolt at the top, and the limiting bolt abuts against the bottom of the limiting slider.

[0018] Furthermore, the fourth limiting unit includes a three-position sliding plate, and the three-position switch also includes a three-position limiting plate. The three-position limiting plate is located behind the three-position operation panel. One end of the three-position sliding plate is slidably connected to the three-position limiting plate, and the other end is fixedly connected to an upper transverse sliding piece. A drive motor is provided on the three-position limiting plate, and the drive motor is used to drive the three-position sliding plate to slide.

[0019] A second fixing plate is fixedly provided on the top of the box body. The second fixing plate is located behind the interlocking hole. A second horizontal sliding groove is provided on the upper horizontal sliding piece. A fifth bolt is provided on the second fixing plate. The upper horizontal sliding piece and the fifth bolt cooperate to realize the sliding connection between the upper horizontal sliding piece and the second fixing plate. An upper stop block is fixedly provided at the bottom of the upper horizontal sliding piece. The upper stop block is used to cover the interlocking hole.

[0020] Furthermore, the mechanical unlocking unit includes a drive plate and a second rotating shaft. The drive plate is provided with a third transverse sliding groove, and a sixth bolt is provided laterally on the right side of the second mounting plate. The drive plate and the second mounting plate are slidably connected through the cooperation of the third transverse sliding groove and the sixth bolt. An abutment plate is fixedly connected to the rear end of the drive plate, and a fixing bolt is also fixedly provided on the right side of the second mounting plate. The fixing bolt is located in front of the abutment plate, and the front end of the abutment plate is connected to the fixing bolt through a tension spring.

[0021] One end of the second rotating shaft passes through the first mounting plate and is connected to the circuit breaker for driving, and is used to change the closing and opening state of the circuit breaker. The other end passes through the second mounting plate and is fixedly connected to a connecting plate. Both the first mounting plate and the second mounting plate are rotatably connected to the second rotating shaft. The rear end of the abutment plate abuts against the connecting plate.

[0022] The beneficial effects of this invention are as follows:

[0023] This invention uses an independent mechanical unlocking unit to mechanically unlock the interlocking system, eliminating the need for electromagnets in the electrical components. This reduces the load on the electromagnets, prevents them from burning out, and avoids affecting the operation of the entire mechanism and causing safety issues. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a perspective view of an interlocking system with a three-station mechanism according to the present invention.

[0026] Figure 2 This is a schematic diagram of the interlocking unit in this invention.

[0027] Figure 3 This is a front view of an interlocking system with a three-station mechanism according to the present invention.

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0029] Figure 5 This is a top view of a three-station interlocking system according to the present invention.

[0030] Figure 6 This is a schematic diagram of the mechanical unlocking unit in this invention.

[0031] In the figure:

[0032] 1-Box body; 11-First mounting plate; 12-Second mounting plate; 121-First fixing plate; 122-Limiting plate; 123-Fixing bolt; 13-Three-position limiting hole; 14-Interlocking hole; 15-Second fixing plate; 21-Three-position operation panel; 22-Three-position limiting disc; 3-Circuit breaker; 31-Limiting bolt; 4-Limiting slider; 51-Three-position sliding plate; 52-Upper transverse slide; 53-Upper stop block; 61-Operating handle; 62-Operating component; 63-First connecting rod; 64-Lower transverse slide; 641-Lower stop block; 65-Vertical connecting rod; 66-First rotating shaft; 67-Crank arm; 68-Connecting sleeve; 681-Second connecting rod; 71-Drive plate; 72-Abutment plate; 73-Tension spring; 74-Connecting plate; 75-Second rotating shaft; 8-Front lower door; 81-Groove. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or components is not necessarily limited to those steps or components explicitly listed, but may include other steps or components not explicitly listed or inherent to such processes, methods, products, or devices.

[0035] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] See appendix Figure 1-6 The present invention discloses an interlocking system for a three-position mechanism, including a three-position switch, a housing 1, a circuit breaker 3, an interlocking unit, and a front lower door 8. The three-position switch is located at the top of the housing 1, and the front lower door 8 is located below the housing 1.

[0039] The interlocking unit is located inside the box 1 on one side. The interlocking unit cooperates with the front lower door 8 through the first limiting unit to limit the front lower door 8.

[0040] Circuit breaker 3 is located on the other side inside the enclosure 1. One end of circuit breaker 3 cooperates with the interlocking unit through the second limiting unit to limit the interlocking unit; the other end of circuit breaker 3 cooperates with the three-position switch through the third limiting unit to limit the three-position switch.

[0041] The three-position switch cooperates with the interlocking unit through the fourth limit unit and is used for the limit interlocking unit;

[0042] The enclosure 1 is also equipped with a mechanical unlocking unit that is connected to the circuit breaker 3 for changing the opening and closing state of the circuit breaker 3.

[0043] The interlocking unit includes an operating component 62 and a vertical connecting rod 65. A second mounting plate 12 is vertically fixed on the right side inside the housing 1. A first fixing plate 121 is fixed on the bottom right side of the second mounting plate 12. The operating component 62 is provided with a first vertical sliding groove. A first bolt is provided on the right side of the first fixing plate 121. The operating component 62 and the first fixing plate 121 are slidably connected through the cooperation of the first vertical sliding groove and the first bolt.

[0044] The vertical connecting rod 65 is provided with a second vertical sliding groove, and the second mounting plate 12 is provided with a second bolt on the right side. The vertical connecting rod 65 and the second mounting plate 12 are slidably connected by the second vertical sliding groove and the second bolt.

[0045] The top of the housing 1 is provided with an interlocking hole 14 for the top end of the vertical connecting rod 65 to be inserted. A limiting plate 122 is fixedly provided on the bottom right side of the second mounting plate 12. A vertical limiting groove is provided on the limiting plate 122. An operating handle 61 is fixedly connected to the front end of the operating component 62, and the rear end passes through the vertical limiting groove and is fixedly connected to the bottom end of the vertical connecting rod 65.

[0046] In this embodiment, when the operating handle 61 moves the operating member 62 upward, it will cause the vertical connecting rod 65 to extend into the interlocking hole 14.

[0047] The first limiting unit includes a lower transverse slide plate 64 and a first connecting rod 63. The lower transverse slide plate 64 is provided with a first transverse sliding groove, and the bottom of the housing 1 is provided with a third bolt. The lower transverse slide plate 64 and the housing 1 are slidably connected through the cooperation of the first transverse sliding groove and the third bolt.

[0048] One end of the first connecting rod 63 is hinged to the right side of the operating member 62, and the other end is hinged to the top of the lower transverse slide 64. The bottom of the lower transverse slide 64 is fixedly provided with a lower stop block 641, and the front lower door 8 is provided with a groove 81 that matches the lower stop block 641.

[0049] In this embodiment, when the operating handle 61 is lifted upward, the operating member 62 slides upward, and under the action of the first connecting rod 63, the lower transverse slide 64 slides to the left, so that the lower stop 641 is aligned with the groove 81, and the front lower door 8 can be lifted and opened.

[0050] The second limiting unit includes a first rotating shaft 66 and a second connecting rod 681. The first rotating shaft 66 is rotatably disposed inside the lower part of the housing 1. A first mounting plate 11 is vertically fixedly disposed on the left side inside the housing 1. The circuit breaker 3 is rotatably connected to the left side of the first mounting plate 11. A crank arm 67 is fixedly sleeved on the rotating shaft near the operating member 62. The crank arm 67 is used to limit the operating member 62. A connecting sleeve 68 is fixedly sleeved on the end of the rotating shaft away from the crank arm 67. One end of the second connecting rod 681 is hinged to the connecting sleeve 68, and the other end is hinged to the circuit breaker 3.

[0051] The third limiting unit includes a limiting slider 4, which has a third vertical sliding groove. The first mounting plate 11 has a fourth bolt on its left side. The limiting slider 4 and the first mounting plate 11 are slidably connected through the cooperation of the third vertical sliding groove and the fourth bolt. The three-position switch includes a three-position operation panel 21 located at the top of the housing 1. The bottom of the three-position operation panel 21 is provided with a three-position limiting hole 13 for the top of the limiting slider 4 to extend into.

[0052] The circuit breaker 3 is provided with a limit bolt 31 at the top, and the limit bolt 31 abuts against the bottom of the limit slider 4.

[0053] In this embodiment, when the circuit breaker 3 is in the closed state, the limit bolt 31 will push the limit slider 4 to move upward and extend into the three-position limit hole 13, thereby restricting the operation of the three-position operation panel 21.

[0054] The fourth limiting unit includes a three-position sliding plate 51, and the three-position switch also includes a three-position limiting plate 22. The three-position limiting plate 22 is located behind the three-position operation panel 21. One end of the three-position sliding plate 51 is slidably connected to the three-position limiting plate 22, and the other end is fixedly connected to an upper horizontal sliding piece 52. A drive motor is provided on the three-position limiting plate 22, and the drive motor is used to drive the three-position sliding plate 51 to slide.

[0055] A second fixing plate 15 is fixedly installed on the top of the housing 1. The second fixing plate 15 is located behind the interlocking hole 14. A second horizontal sliding groove is provided on the upper horizontal sliding piece 52. A fifth bolt is provided on the second fixing plate 15. The upper horizontal sliding piece 52 and the second fixing plate 15 are slidably connected through the cooperation of the second horizontal sliding groove and the fifth bolt. An upper stop block 53 is fixedly installed at the bottom of the upper horizontal sliding piece 52. The upper stop block 53 is used to block the interlocking hole 14.

[0056] In this embodiment, if the three-position operation panel 21 is in the closed or isolated state, the drive motor of the three-position limit plate 22 will drive the three-position slide plate 51 to slide, thereby driving the upper stop block 53 of the upper transverse slide plate 52 to block the interlocking hole 14; if the three-position operation panel 21 is in the grounded state, the drive motor of the three-position limit plate 22 will not drive the three-position slide plate 51 to slide, and the upper stop block 53 of the upper transverse slide plate 52 will not block the interlocking hole 14.

[0057] The mechanical unlocking unit includes a drive plate 71 and a second rotating shaft 75. The drive plate 71 is provided with a third transverse sliding groove. A sixth bolt is provided laterally on the right side of the second mounting plate 12. The drive plate 71 and the second mounting plate 12 are slidably connected through the cooperation of the third transverse sliding groove and the sixth bolt. An abutment plate 72 is fixedly connected to the rear end of the drive plate 71. A fixing bolt 123 is also fixedly provided on the right side of the second mounting plate 12. The fixing bolt 123 is located in front of the abutment plate 72. The front end of the abutment plate 72 is connected to the fixing bolt 123 through a tension spring 73.

[0058] One end of the second rotating shaft 75 passes through the first mounting plate 11 and is connected to the circuit breaker 3 for driving, and is used to change the opening and closing state of the circuit breaker 3. The other end passes through the second mounting plate 12 and is fixedly connected to the connecting plate 74. Both the first mounting plate 11 and the second mounting plate 12 are rotatably connected to the second rotating shaft 75, and the rear end of the abutment plate 72 abuts against the connecting plate 74.

[0059] In this embodiment, the transmission connection between the second rotating shaft 75 and the circuit breaker 3 adopts the existing technology and is only used to realize the rotation of the second rotating shaft 75, which can change the closing and opening state of the circuit breaker 3. It is not shown in the figure and will not be described in detail here.

[0060] Working principle:

[0061] When the circuit breaker 3 is in the open state, the circuit breaker 3 drives the first rotating shaft 66 to rotate through the second connecting rod 681, which in turn drives the crank arm 18 to rotate to the designated position, so that it abuts against the rear end of the operating part 62 and interlocks the operating handle 61. The operating handle 61 cannot move up and cannot drive the lower stop block 641 into the groove 81. At this time, the limit bolt 31 on the circuit breaker 3 does not push the limit slider 4 into the three-position limit hole 13, so the three-position operating panel 21 is not locked. At this time, the three-position operating panel 21 can be operated, and the front lower door 8 cannot be opened to avoid electric shock to personnel.

[0062] When the circuit breaker 3 is in the closed state, the limit bolt 31 on the circuit breaker 3 pushes the limit slider 4 into the three-position limit hole 13, and the limit slider 4 locks the three-position operation panel 21. At this time, the three-position operation panel 21 cannot be operated. If the three-position operation panel 21 is in the closed or isolated state, the drive motor of the three-position limit plate 22 will drive the three-position slide plate 51 to slide, which in turn drives the upper stop block 53 of the upper horizontal slide plate 52 to block the interlock hole 14, preventing the vertical connecting rod 65 from moving upward, and thus preventing the operating handle 16 from being lifted. At this time, the three-position operation panel 21 cannot be operated, and the front lower door 8 cannot be opened.

[0063] When the circuit breaker 3 is in the closed state, the limit slider 4 locks the three-position operation panel 21, and the three-position operation panel 21 cannot be operated at this time. If the three-position operation panel 21 is in the grounded state at this time, the drive motor of the three-position limit plate 22 will not drive the three-position slide plate 51 to slide. The upper stop block 53 of the upper horizontal slide plate 52 does not block the interlocking hole 14, and the vertical connecting rod 65 can move upward. Lifting the operating handle 16 can open the front lower door 8, avoiding the risk of electric shock to the operator.

[0064] When the interlocking system needs to be unlocked and the circuit breaker 3 is in the closed state, the drive plate 71 is pushed, which causes the abutment plate 72 to slide. The abutment plate 72 pushes the connecting plate 74, causing the second rotating shaft 75 to rotate. Under the transmission action, the circuit breaker 3 is driven from the closed state to the open state. The three-position operation panel 21 is grounded, and the front lower door 8 can be opened. The above process is mechanically unlocked by an independent mechanical unlocking unit, which does not require the use of electromagnets in the electrical part, reducing the load on the electromagnets and avoiding the electromagnets burning out, which would affect the operation of the entire mechanism and cause safety problems.

[0065] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An interlocking system for a three-station mechanism, characterized in that: It comprises a three-position switch, a box (1), a circuit breaker (3), an interlocking unit and a front lower door (8), wherein the three-position switch is located at the top of the box (1), and the front lower door (8) is located below the box (1); The interlocking unit is located at one side of the interior of the box body (1), and the interlocking unit cooperates with the front lower door (8) through a first limiting unit to limit the front lower door (8); The circuit breaker (3) is located at the other side of the box (1); one end of the circuit breaker (3) cooperates with the interlocking unit through a second limiting unit to limit the interlocking unit; the other end of the circuit breaker (3) cooperates with the three-position switch through a third limiting unit to limit the three-position switch; The three-position switch cooperates with the interlocking unit through a fourth limiting unit to limit the interlocking unit; A mechanical unlocking unit is also provided inside the box (1) and is transmission-connected to the circuit breaker (3) and is used to change the closing and opening state of the circuit breaker (3).

2. The interlocking system of a three-station mechanism according to claim 1, characterized in that: The interlocking unit comprises an operating member (62) and a vertical connecting rod (65); a second mounting plate (12) is vertically fixedly arranged on the right side of the box body (1); a first fixing plate (121) is fixedly arranged on the right bottom of the second mounting plate (12); a first vertical sliding groove is arranged on the operating member (62); a first bolt is arranged on the right side of the first fixing plate (121); and the first vertical sliding groove cooperates with the first bolt to realize sliding connection between the operating member (62) and the first fixing plate (121); The vertical connecting rod (65) is provided with a second vertical sliding groove, and a second bolt is vertically provided on the right side of the second mounting plate (12), and the second vertical sliding groove cooperates with the second bolt to achieve sliding connection between the vertical connecting rod (65) and the second mounting plate (12); The top of the box body (1) is provided with an interlocking hole (14) for the top end of the vertical connecting rod (65) to extend therein, a limiting plate (122) is fixedly provided at the bottom right side of the second mounting plate (12), and a vertical limiting groove is provided on the limiting plate (122), and the front end of the operating member (62) is fixedly connected to an operating handle (61), and the rear end passes through the vertical limiting groove and is fixedly connected to the bottom end of the vertical connecting rod (65).

3. The interlocking system of a three-station mechanism according to claim 2, characterized in that: The first limiting unit comprises a lower transverse sliding plate (64) and a first connecting rod (63); the lower transverse sliding plate (64) is provided with a first transverse sliding groove; a third bolt is provided at the bottom of the box body (1); the lower transverse sliding plate (64) is slidably connected to the box body (1) by the cooperation of the first transverse sliding groove and the third bolt; One end of the first connecting rod (63) is hinged to the right side of the operating member (62), and the other end is hinged to the top of the lower transverse slide (64); a lower stopper (641) is fixedly provided at the bottom of the lower transverse slide (64); and the front lower door (8) is provided with a groove (81) adapted to the lower stopper (641).

4. The interlocking system of a three-station mechanism according to claim 2, characterized in that: The second limiting unit comprises a first rotating shaft (66) and a second connecting rod (681), wherein the first rotating shaft (66) is rotatably arranged at the lower part of the box body (1), a first mounting plate (11) is vertically fixedly arranged on the left side of the box body (1), and the circuit breaker (3) is rotatably connected to the left side of the first mounting plate (11), a crank arm (67) is fixedly sleeved on the position of the rotating shaft close to the operating member (62), and the crank arm (67) is used to limit the operating member (62), and a connecting sleeve (68) is fixedly sleeved on one end of the rotating shaft away from the crank arm (67), and one end of the second connecting rod (681) is hinged to the connecting sleeve (68), and the other end is hinged to the circuit breaker (3).

5. An interlocking system of a three-station mechanism according to claim 4, characterized in that: The third limiting unit comprises a limiting slider (4), a third vertical sliding groove is provided on the limiting slider (4), a fourth bolt is provided on the left side of the first mounting plate (11), and the third vertical sliding groove cooperates with the fourth bolt to realize the sliding connection between the limiting slider (4) and the first mounting plate (11), and the three-position switch comprises a three-position operation panel (21) located at the top of the box body (1), and a three-position limiting hole (13) is provided at the bottom of the three-position operation panel (21) for the top end of the limiting slider (4) to extend into; A limiting bolt (31) is provided on the top of the circuit breaker (3), and the limiting bolt (31) abuts against the bottom of the limiting slide block (4).

6. An interlocking system of a three-station mechanism according to claim 5, characterized in that: The fourth limiting unit comprises a three-position slide plate (51), the three-position switch further comprises a three-position limiting disk (22), the three-position limiting disk (22) is located behind the three-position operation panel (21), one end of the three-position slide plate (51) is slidably connected to the three-position limiting disk (22), and the other end is fixedly connected to an upper transverse slide plate (52), and the three-position limiting disk (22) is provided with a driving motor, and the driving motor is used to drive the three-position slide plate (51) to slide; A second fixing plate (15) is fixedly provided on the top of the box body (1), and the second fixing plate (15) is located behind the interlocking hole (14). A second transverse sliding groove is provided on the upper transverse sliding plate (52), and a fifth bolt is provided on the second fixing plate (15). The second transverse sliding groove cooperates with the fifth bolt to realize the sliding connection between the upper transverse sliding plate (52) and the second fixing plate (15). An upper stopper (53) is fixedly provided on the bottom of the upper transverse sliding plate (52), and the upper stopper (53) is used to cover the interlocking hole (14).

7. An interlocking system of a three-station mechanism according to claim 4, characterized in that: The mechanical unlocking unit comprises a driving plate (71) and a second rotating shaft (75), the driving plate (71) is provided with a third transverse sliding groove, a sixth bolt is transversely arranged on the right side of the second mounting plate (12), and the third transverse sliding groove cooperates with the sixth bolt to realize the sliding connection between the driving plate (71) and the second mounting plate (12), the rear end of the driving plate (71) is fixedly connected with an abutting plate (72), and the right side of the second mounting plate (12) is also fixedly provided with a fixing bolt (123), the fixing bolt (123) is located in front of the abutting plate (72), and the front end of the abutting plate (72) is connected to the fixing bolt (123) through a tension spring (73); One end of the second rotating shaft (75) passes through the first mounting plate (11) and is transmission-connected to the circuit breaker (3) for changing the closing and opening states of the circuit breaker (3); the other end passes through the second mounting plate (12) and is fixedly connected to a connecting plate (74); the first mounting plate (11) and the second mounting plate (12) are both rotationally connected to the second rotating shaft (75); the rear end of the abutting plate (72) abuts against the connecting plate (74).

Images