A switch cabinet with a sensing interlocking function

Abstract

The application belongs to the technical field of power equipment, and particularly relates to a switch cabinet with a sensing locking function, which comprises a cabinet body, a chassis trolley and a vacuum circuit breaker, two groups of auxiliary switches are installed below the bottom wall of the compartment, two groups of symmetrically distributed first sliding plates are slidingly connected to the mounting seat, the two groups of first sliding plates are connected to the corresponding auxiliary switches through linkage assemblies respectively, one end of the first sliding plate close to the shaft sleeve is provided with a plug, the two sides of the lead screw are provided with plug holes matched with the plug, cabinet door linkage mechanisms are installed at the two ends of the mounting seat, and the cabinet door linkage mechanisms are in action association with the corresponding first sliding plates. Through the cabinet door linkage mechanism and the plug-hole structure, it is ensured that the chassis trolley cannot be moved to the working position when the cabinet door is not completely closed, and the risk of live operation is avoided.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, specifically a switchgear with sensing and interlocking function. Background Technology

[0002] Medium and high voltage switchgear is a key piece of equipment in power systems used for the distribution, control and protection of electrical energy. It is mainly used in substations, industrial and mining enterprises, building power distribution and other occasions, with voltage levels typically between 3.6kV and 40.5kV.

[0003] Switchgear typically includes a cabinet, vacuum circuit breakers, disconnect switches, grounding switches, and other components. Safety is one of the most important technical indicators of switchgear. In order to meet the "five protections" requirements, namely, preventing closing the switch under load, preventing accidental entry into a live compartment, preventing closing the switch with the grounding wire connected, preventing pulling the knife switch under load, and preventing the grounding wire from being attached to a live circuit, various manufacturers have designed a variety of interlocking mechanisms in switchgear.

[0004] The chassis vehicle serves as a mobile carrier for vacuum circuit breakers, enabling the switching of the circuit breaker between the operating, testing, and deactivation positions. However, the main problem currently is that the interlocking function of some switchgear is not perfect: the chassis vehicle can still move the vacuum circuit breaker when the cabinet door is not fully closed, thus enabling opening and closing operations, which poses a safety hazard. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention proposes a switchgear with sensing and interlocking functions, which restricts the opening and closing operations of the vacuum circuit breaker through a multi-interlocking mechanism. Specifically, this is achieved through the following technical solution:

[0006] A switch cabinet with a sensing and interlocking function includes a cabinet body and a vacuum circuit breaker. A compartment is provided on one side of the cabinet body. The vacuum circuit breaker is mounted inside the compartment via a chassis trolley. The chassis trolley is equipped with a lead screw and a positioning beam. Two sets of auxiliary switches are installed below the bottom wall of the compartment. A mounting base is fixed to one side of the positioning beam. Parallel, spaced fixing plates are fixed to one side of the mounting base. Bushings are provided on the fixing plates, and the bushings are fitted with the lead screw. A first guide cavity is formed between the fixing plates and the mounting base. Two symmetrically distributed first sliding plates are slidably connected within the first guide cavity. The two sets of first sliding plates are respectively connected to their corresponding auxiliary switches via linkage components. The first sliding plates are elastically connected to the fixing plates via first tension springs. An insertion plate is provided at one end of each first sliding plate near the bushing. Insertion holes adapted to the insertion plates are provided on both sides of the lead screw. Cabinet door linkage mechanisms are installed at both ends of the mounting base. The cabinet door linkage mechanisms are action-linked with the corresponding first sliding plates. Locking components are slidably connected to both ends of the inner cavity of the positioning beam. Positioning holes adapted to the locking components are provided on the inner side wall of the compartment.

[0007] Preferably, the linkage component includes a transmission plate and a torsion plate. The transmission plate is rotatably mounted on the bottom wall of the compartment. A shift fork is fixed on one side of the first slide plate. One end of the transmission plate is provided with a contact that engages with the shift fork. The other end of the transmission plate is hinged to one end of the torsion plate. The other end of the torsion plate is fixedly connected to the push rod of the auxiliary switch.

[0008] Preferably, the contact includes a guide post, one end of which is provided with a first locking tongue that engages with a shift fork, the other end of which passes through and slides through a transmission plate, and a first spring is sleeved on the guide post, the first spring abutting between the first locking tongue and the transmission plate.

[0009] Preferably, the cabinet door linkage mechanism includes a first rotating shaft, which is vertically fixed to the end of the mounting base. An arc-shaped plate is fixed to the shaft of the first rotating shaft, and rollers are installed at both ends of the arc-shaped plate. The end of the first sliding plate away from the fixed plate is provided with a first bent portion, which makes rolling contact with one of the rollers.

[0010] Preferably, the locking assembly includes a handle, a second tension spring, and a second sliding plate. Two sets of linearly arranged guide rollers are symmetrically arranged at both ends of the inner cavity of the positioning beam. The two sets of guide rollers form a second guide cavity with the inner cavity sidewall of the positioning beam. The second sliding plate is placed in the second guide cavity and forms a sliding fit. One side of the positioning beam is provided with a first movable hole communicating with its inner cavity. The handle passes through the first movable hole and is fixedly connected to the second sliding plate. A lock head adapted to the positioning hole is fixed at the end of the second sliding plate away from the mounting seat. The other end of the second sliding plate is provided with a second bent part. One end of the second tension spring is hooked on the second bent part, and the other end of the second tension spring is hooked on the positioning beam.

[0011] Preferably, the lock head includes a lock body and a movable rod. The movable rod is slidably disposed in the inner cavity of the lock body. One end of the inner cavity of the lock body is fixed with an end seat. The end of the movable rod facing the positioning hole is provided with a second latch. The outer wall of the lock body is provided with a threaded hole communicating with its inner cavity. A set screw is connected in the threaded hole. The outer wall of the second latch is provided with a guide groove. The end of the set screw is embedded in the guide groove. The movable rod is sleeved with a second spring. The second spring abuts against the second latch and the end seat.

[0012] Preferably, the partition of the compartment is equipped with two rows of stationary contact seats, and the inner cavity of the compartment is provided with a valve mechanism for covering the stationary contact seats, and the valve mechanism is associated with the operation of the vacuum circuit breaker.

[0013] Preferably, the valve mechanism includes a first insulating plate and a second insulating plate arranged in parallel. Guide rods are symmetrically fixed on both sides of the partition, and the first and second insulating plates are slidably disposed between the two sets of guide rods. Drive plates are symmetrically arranged on both sides of the vacuum circuit breaker. Opening and closing components are fixed on both sides of the inner cavity of the partition, and the opening and closing components are associated with the corresponding drive plates. First connecting plates are hinged to both ends of the first insulating plate, and second connecting plates are hinged to both ends of the second insulating plate. The first connecting plates and the second connecting plates are associated with the corresponding opening and closing components.

[0014] Preferably, the opening and closing assembly includes a fixed base, which is fixedly installed on the inner cavity side wall of the compartment. A second rotating shaft is installed on one side of the fixed base. A first shear plate and a second shear plate that cooperate with each other are rotatably installed on the second rotating shaft. The end of the first shear plate is hinged to a first connecting plate, and the end of the second shear plate is hinged to a second connecting plate. A torsion spring is sleeved on the second rotating shaft, and the two torsion arms of the torsion spring are hooked and connected to the first shear plate and the second shear plate, respectively.

[0015] Preferably, the drive plate is provided with a first sidewall and a second sidewall that are parallel to each other. The first sidewall and the second sidewall are each provided with a guide portion at one end near the partition. A guide inclined plate is provided on one side of the guide portion. A first force-applying shaft is installed on one side of the first shear plate. The first force-applying shaft is in rolling contact with the second sidewall. A second force-applying shaft is installed on one side of the second shear plate. The second force-applying shaft is in rolling contact with the first sidewall.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] The cabinet door linkage mechanism and the plug-in-hole structure ensure that the chassis cannot move to the working position when the cabinet door is not fully closed, avoiding the risk of live operation. At the same time, the linkage component transmits the cabinet door status signal to the control circuit through the auxiliary switch, ensuring that the vacuum circuit breaker cannot perform opening or closing operations when the cabinet door is not fully closed, achieving dual protection of electrical interlocking. Attached Figure Description

[0018] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of the positioning beam;

[0021] Figure 3 This is a schematic diagram of the cabinet door linkage mechanism;

[0022] Figure 4 This is a schematic diagram of the installation of the linkage components;

[0023] Figure 5 This is a structural diagram of the linkage component;

[0024] Figure 6 This is a schematic diagram of the first skateboard structure;

[0025] Figure 7 This is a schematic diagram of the contact structure;

[0026] Figure 8 This is a schematic diagram of the locking assembly.

[0027] Figure 9 This is a schematic diagram of the lock cylinder structure;

[0028] Figure 10 This is a schematic diagram of the closed state of the valve mechanism;

[0029] Figure 11 A schematic diagram showing the opening and closing states of the valve mechanism;

[0030] Figure 12 This is a schematic diagram of the opening and closing component.

[0031] Explanation of reference numerals in the attached drawings: 1-Compartment, 2-Vacuum circuit breaker, 3-Positioning beam, 4-Locking assembly, 5-Chassis, 6-Drive plate, 7-Door mechanism, 8-Static contact seat, 9-Partition plate, 10-Guide rail, 11-Baffle, 12-First movable hole, 13-Busset, 14-Door linkage mechanism, 15-Mounting base, 16-Handle, 17-Positioning hole, 18-Lead screw, 19-Arc plate, 20-First rotating shaft, 21-Roller, 22-Fixed plate, 23-First sliding plate, 24-First bending part, 25-Shift fork, 26-Second movable hole, 27-First cover plate, 28-Linkage assembly, 29-Second cover plate, 30-Auxiliary switch, 31-Transmission plate, 32-First tension spring, 33-Contact, 34-Torsion plate, 35-First guide slope, 36-Guide hole, 3 7-First spring, 38-Guide post, 39-First locking tongue, 40-Lock head, 41-Second tension spring, 42-Second sliding plate, 43-Guide roller, 44-Second bending part, 45-Guide groove, 46-Top screw, 47-Lock body, 48-Moving rod, 49-End seat, 50-Second spring, 51-Second locking tongue, 52-Second guide ramp, 53-First insulating plate, 54-Opening and closing assembly, 55-First connecting plate, 56-Second connecting plate, 57-Guide rod, 58-Second insulating plate, 59-Fixed seat, 60-First side wall, 61-Second side wall, 62-Torsion spring, 63-First force-applying shaft, 64-Second rotating shaft, 65-First shear plate, 66-Second shear plate, 67-Guide ramp, 68-Guide part, 69-Second force-applying shaft, 70-Insertion hole, 71-Insertion plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Those skilled in the art will recognize that the invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of it.

[0033] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the invention. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] like Figure 1 and Figure 2As shown, this embodiment provides a switch cabinet with a sensing interlocking function. Its core structure includes a cabinet, a vacuum circuit breaker 2, and a chassis 5. The chassis 5 serves as a moving carrier to support the vacuum circuit breaker 2. A compartment 1 is provided on one side of the cabinet. This compartment 1 forms an independent functional chamber through a compartmentalized design, effectively isolating electrical components of different voltage levels.

[0035] Two parallel guide rails 10 are fixedly installed on the upper surface of the bottom wall of compartment 1. The vacuum circuit breaker 2 is linearly displaced along the guide rails 10 by the movement of the chassis 5, thereby completing the pushing or pulling operation of the vacuum circuit breaker 2 in compartment 1.

[0036] like Figures 1 to 3 As shown, a split positioning beam 3 is provided on the side of the chassis 5 away from the partition 9. Locking components 4 are slidably connected to both ends of the inner cavity of the positioning beam 3. Positioning holes 17 adapted to the locking components 4 are provided on the inner wall of the compartment 1, forming a reliable mechanical interlocking system. A mounting base 15 is fixed on the side of the chassis 5 away from the positioning beam 3, and parallel, spaced fixing plates 22 are fixed on the side of the mounting base 15 away from the chassis 5. A lead screw 18 is installed in the middle of the chassis 5, and a bushing 13 is provided on the fixing plate 22, with the bushing 13 engaging with the end of the lead screw 18.

[0037] A baffle 11 is fixed to the inner wall of compartment 1. The vertical positioning surface of the baffle 11 abuts against the lateral contact surface of the positioning beam 3, thereby limiting the movement of the positioning beam 3 through physical obstruction. The positioning beam 3 is pushed into compartment 1 along with the chassis 5. When the positioning beam 3 moves to the position of the baffle 11, the end of the locking assembly 4 automatically engages the positioning hole 17, thereby reliably fixing the positioning beam 3. When operating the vacuum circuit breaker 2, simply align the handle with the end of the lead screw 18, and rotate the handle to drive the lead screw 18 to rotate, which will cause the chassis 5 to move relative to the positioning beam 3, ultimately enabling the vacuum circuit breaker 2 to move forward or backward within compartment 1.

[0038] like Figures 3 to 6 As shown, a second cover plate 29 is installed below the bottom wall of compartment 1. Two sets of auxiliary switches 30 are fixed inside the second cover plate 29. The auxiliary switches 30 are connected to the system control circuit to form an electrical interlock. The installation gap between the fixing plate 22 and the mounting base 15 forms a first guide cavity. Two sets of first sliding plates 23 are symmetrically placed in the first guide cavity to form a sliding fit.

[0039] A fork 25 is fixed to one side of the first slide plate 23. The fork 25 passes through the mounting base 15 and the side wall of the positioning beam 3 and extends into the inner cavity of the positioning beam 3. The fork 25 is connected to the corresponding auxiliary switch 30 through the linkage assembly 28. A first cover plate 27 covering the linkage assembly 28 is installed below the bottom wall of the compartment 1.

[0040] Cabinet door linkage mechanisms 14 are installed at both ends of the mounting base 15, and the cabinet door linkage mechanisms 14 are linked to the first sliding plate 23 on the same side. The first sliding plate 23 is elastically connected to the fixed plate 22 through the first tension spring 32 to ensure the reliability of the reset of the first sliding plate 23.

[0041] like Figure 3 and Figure 6 As shown, the cabinet door linkage mechanism 14 includes a first rotating shaft 20. The first rotating shaft 20 is vertically fixed to the end of the mounting base 15. An arc-shaped plate 19 is fixed to the shaft body of the first rotating shaft 20, and rollers 21 are installed at both ends of the arc-shaped plate 19. The end of the first sliding plate 23 away from the fixed plate 22 is provided with a first bent portion 24, which maintains rolling contact with one of the rollers 21. The end of the first sliding plate 23 near the bushing 13 is provided with an insert plate 71, and the two sides of the lead screw 18 are provided with insertion holes 70 that are adapted to the insert plate 71.

[0042] Once the positioning beam 3 is in place, the first tension spring 32 is in its naturally extended state. At this time, the insert plate 71 will insert into the corresponding socket 70, thereby locking the lead screw 18 and preventing it from rotating. This design ensures that the chassis 5 cannot move to the working position when the cabinet door is not fully closed, effectively avoiding the risk of live operation. When the cabinet door is closed, the cabinet door will push the arc plates 19 on both sides to rotate around the first pivot 20, thereby driving the first sliding plates 23 on both sides to move outward, causing the insert plate 71 to disengage from the socket 70, realizing the unlocking operation of the lead screw 18.

[0043] like Figure 5 and Figure 7 As shown, the linkage assembly 28 includes a transmission plate 31 and a torsion plate 34. The transmission plate 31 is rotatably mounted below the bottom wall of the compartment 1 via a rotating shaft. One end of the transmission plate 31 is provided with a contact 33 that engages with the shift fork 25. The other end of the transmission plate 31 is hinged to one end of the torsion plate 34. The other end of the torsion plate 34 is fixedly connected to the push rod of the auxiliary switch 30.

[0044] The contact 33 includes a guide post 38, with a first locking tongue 39 at its upper end and two sets of first guide ramps 35 symmetrically arranged at the end of the first locking tongue 39. The body of the guide post 38 passes through the guide hole 36 of the transmission plate 31 to form a sliding fit, and a nut is connected to the lower end of the guide post 38 to achieve axial limiting. A first spring 37 is sleeved on the guide post 38, and the first spring 37 abuts against the first locking tongue 39 and the transmission plate 31. Under the preload of the first spring 37, the first locking tongue 39 passes through the bottom wall of the compartment 1 and the second movable hole 26 of the positioning beam 3 and extends into the inner cavity of the positioning beam 3 to form an initial positioning state.

[0045] When the positioning beam 3 is installed, its edge presses against the first guide slope 35 of the first latch 39, forcing the first latch 39 to compress the first spring 37 and retract downwards. As the positioning beam 3 continues to advance, when the second movable hole 26 moves to the corresponding position of the first latch 39, the first latch 39 is reset and popped out under the action of the spring. At this time, the open end of the shift fork 25 forms a reliable locking engagement with the first latch 39, ensuring the synchronous movement of the linkage assembly 28 and the cabinet door linkage mechanism 14.

[0046] When the cabinet door is closed, its inner contact surface pushes the arc-shaped plates 19 on both sides of the mounting base 15 to rotate around the first rotating shaft 20. The arc-shaped plates 19 drive the first sliding plate 23 to slide outward along the first guide cavity via the rollers 21. The first sliding plate 23 drives the transmission plate 31 to rotate around its rotating shaft via the shift fork 25. The transmission plate 31 triggers the push rod action of the auxiliary switch 30 via the torsion plate 34. The system is only allowed to perform opening and closing operations when both sets of auxiliary switches 30 are triggered.

[0047] like Figure 8 As shown, the locking assembly 4 includes a handle 16, a second tension spring 41, and a second sliding plate 42. Two sets of linearly arranged guide rollers 43 are symmetrically arranged at both ends of the inner cavity of the positioning beam 3. The installation gap between these guide rollers 43 and the side wall of the inner cavity of the positioning beam 3 forms a second guide cavity. The second sliding plate 42 is placed within the second guide cavity to form a sliding fit, thereby achieving linear reciprocating motion. One side of the positioning beam 3 has a first movable hole 12 communicating with its inner cavity. The handle 16 passes through the first movable hole 12 and is fixedly connected to the second sliding plate 42. A lock head 40 adapted to the positioning hole 17 is fixed to one end of the second sliding plate 42 away from the mounting base 15, and a second bent portion 44 is provided at the other end of the second sliding plate 42. One end of the second tension spring 41 is hooked onto the second bent portion 44, and the other end of the second tension spring 41 is hooked onto the inner wall of the positioning beam 3, forming an elastic reset mechanism.

[0048] When the positioning beam 3 is moved along the guide rail 10, the locking head 40 is subjected to the squeezing force of the side wall of the compartment 1, forcing the second sliding plate 42 to slide inward and stretching the second tension spring 41. When the positioning beam 3 moves to the position of the baffle 11, the elastic restoring force of the second tension spring 41 drives the second sliding plate 42 to reset, so that the locking head 40 is accurately embedded in the positioning hole 17, thereby achieving reliable locking of the positioning beam 3. When unlocking is required, the operator can push the handle 16 inward to disengage the locking head 40 from the positioning hole 17, thus releasing the mechanical locking state of the positioning beam 3.

[0049] like Figure 9As shown, the lock head 40 adopts a split structure, comprising a lock body 47 and a movable rod 48. The movable rod 48 is fitted into the inner cavity of the lock body 47 to form a sliding fit. An end seat 49 is fixedly installed at one end of the inner cavity of the lock body 47. A second latch 51 is provided at the end of the movable rod 48 facing the positioning hole 17. The end of the latch is provided with a second guide slope 52, which forms a self-locking fit with the positioning hole 17. A threaded hole communicating with the inner cavity is opened on the outer wall of the lock body 47. A set screw 46 is screwed into the threaded hole and forms a fit with the guide groove 45 on the outer wall of the movable rod 48. The guide groove 45 is an axially elongated groove structure, which not only realizes the sliding guidance of the movable rod 48, but also prevents the second latch 51 from rotating through the limiting effect of the set screw 46. A second spring 50 is fitted on the movable rod 48. The spring abuts between the second latch 51 and the end seat 49, providing a continuous preload force for the lock head 40 to ensure locking reliability.

[0050] The interior of compartment 1 is equipped with a partition 9, and two rows of stationary contact seats 8 are installed on the back side of the partition 9, forming a fixed connection terminal. The inner cavity of compartment 1 is equipped with a valve mechanism 7 that dynamically covers the stationary contact seats 8, and the valve mechanism 7 is mechanically linked with the vacuum circuit breaker 2. When the vacuum circuit breaker 2 is not in the working position, the valve mechanism 7 remains closed, completely blocking the stationary contact seats 8. As the vacuum circuit breaker 2 is gradually advanced, the valve mechanism 7 gradually opens under the linkage action. After the vacuum circuit breaker 2 is fully in place, the moving contact of the vacuum circuit breaker 2 precisely connects with the exposed stationary contact seats 8, thereby constructing a complete energizing circuit.

[0051] like Figure 10 and Figure 11 As shown, the valve mechanism 7 uses a first insulating plate 53 and a second insulating plate 58 arranged vertically in parallel as its main frame structure. Guide rods 57 are symmetrically arranged on both sides of the partition 9, with the two guide rods 57 penetrating vertically through the first insulating plate 53 and the second insulating plate 58 respectively, achieving a sliding guiding function and ensuring the vertical lifting accuracy of the valve mechanism 7. Drive plates 6 are symmetrically arranged on both sides of the vacuum circuit breaker 2. Opening and closing components 54 are fixedly installed on both sides of the inner cavity of the compartment 1, and these components are action-linked with the corresponding drive plates 6. First connecting plates 55 are hinged to both ends of the first insulating plate 53, and second connecting plates 56 are hinged to both ends of the second insulating plate 58. These connecting plates are action-linked with the corresponding opening and closing components 54.

[0052] like Figure 12As shown, the opening and closing assembly 54 includes a fixed base 59, which is fixedly installed on the inner wall of the compartment 1. A second rotating shaft 64 is installed on one side of the fixed base 59, on which a first shear plate 65 and a second shear plate 66 are rotatably mounted, forming a scissor-type linkage structure. The end of the first shear plate 65 is hinged to the first connecting plate 55, and the end of the second shear plate 66 is hinged to the second connecting plate 56. A torsion spring 62 is sleeved on the second rotating shaft 64, and the two torsion arms of the torsion spring are hooked and connected to the first shear plate 65 and the second shear plate 66 respectively, providing an elastic driving force for the automatic reset of the valve mechanism 7.

[0053] The drive plate 6 is provided with a first sidewall 60 and a second sidewall 61 that are parallel to each other. Each sidewall is provided with a guide portion 68 at one end near the partition plate 9, and a guide ramp 67 is provided on one side of the guide portion. A first force-applying shaft 63 is installed on one side of the first shear plate 65, and the shaft forms rolling contact with the second sidewall 61; a second force-applying shaft 69 is installed on one side of the second shear plate 66, and the shaft forms rolling contact with the first sidewall 60.

[0054] When the vacuum circuit breaker 2 is advanced, the first sidewall 60 and the second sidewall 61 of the drive plate 6 come into contact with the first shear plate 65 and the second shear plate 66 of the opening and closing assembly 54 via the guide inclined plate 67. The rolling action of the first force-applying shaft 63 and the second force-applying shaft 69 drives the two shear plates to rotate around the second rotating shaft 64, thereby pulling the first connecting plate 55 and the second connecting plate 56 to move, which in turn moves the first insulating plate 53 and the second insulating plate 58, realizing the opening operation of the valve mechanism 7. When the vacuum circuit breaker 2 is withdrawn, the elastic restoring force of the torsion spring 62 drives the first shear plate 65 and the second shear plate 66 to reset, the valve mechanism 7 automatically closes, and the protection of the stationary contact seat 8 is restored.

[0055] The embodiments described above are not exhaustive and do not limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A switch cabinet with sensing and interlocking function, comprising a cabinet body and a vacuum circuit breaker (2), wherein a compartment (1) is provided on one side of the cabinet body, and the vacuum circuit breaker (2) is installed inside the compartment (1) via a chassis (5), wherein the chassis (5) is provided with a lead screw (18) and a positioning beam (3); characterized in that: Two sets of auxiliary switches (30) are installed below the bottom wall of the compartment (1). A mounting base (15) is fixed on the side of the positioning beam (3) away from the chassis (5). A parallel and spaced fixing plate (22) is fixed on the side of the mounting base (15) away from the chassis (5). A bushing (13) is provided on the fixing plate (22). The bushing (13) is installed in conjunction with the lead screw (18). A first guide cavity is formed between the fixing plate (22) and the mounting base (15). Two sets of symmetrically distributed first sliding plates are slidably connected in the first guide cavity. (23), the two sets of first slide plates (23) are respectively connected to the corresponding auxiliary switches (30) through the linkage assembly (28), and the first slide plate (23) is elastically connected to the fixed plate (22) through the first tension spring (32); the first slide plate (23) is provided with a plug plate (71) at one end near the bushing (13), and the screw (18) is provided with plug holes (70) on both sides that are adapted to the plug plate (71); the two ends of the mounting base (15) are equipped with cabinet door linkage mechanisms (14), and the cabinet door linkage mechanism (14) is connected to the corresponding first slide plate (23). 3) Forming an action association; both ends of the inner cavity of the positioning beam (3) are slidably connected to locking components (4), and the inner side wall of the compartment (1) is provided with positioning holes (17) adapted to the locking components (4); the linkage component (28) includes a transmission plate (31) and a torsion plate (34). The transmission plate (31) is rotatably installed on the bottom wall of the compartment (1). A shift fork (25) is fixed on one side of the first slide plate (23). One end of the transmission plate (31) is provided with a contact (33) that engages with the shift fork (25). The other end of the transmission plate (31) is provided with a contact (33) that engages with the shift fork (25). One end of the contact (33) is hinged to one end of the torsion plate (34), and the other end of the torsion plate (34) is fixedly connected to the push rod of the auxiliary switch (30); the contact (33) includes a guide post (38), one end of the guide post (38) is provided with a first locking tongue (39), the first locking tongue (39) is engaged with the shift fork (25), the other end of the guide post (38) passes through the transmission plate (31) and slides with it, the guide post (38) is sleeved with a first spring (37), the first spring (37) abuts between the first locking tongue (39) and the transmission plate (31).

2. The switchgear with sensing interlocking function according to claim 1, characterized in that: The cabinet door linkage mechanism (14) includes a first rotating shaft (20), which is vertically fixed to the end of the mounting base (15). An arc plate (19) is fixed to the shaft of the first rotating shaft (20). Rollers (21) are installed at both ends of the arc plate (19). A first bending part (24) is provided at the end of the first sliding plate (23) away from the fixed plate (22). The first bending part (24) is in rolling contact with one of the rollers (21).

3. The switchgear with sensing interlocking function according to claim 1, characterized in that: The locking assembly (4) includes a handle (16), a second tension spring (41), and a second sliding plate (42). Two sets of linearly arranged guide rollers (43) are symmetrically arranged at both ends of the inner cavity of the positioning beam (3). The two sets of guide rollers (43) form a second guide cavity with the inner cavity sidewall of the positioning beam (3). The second sliding plate (42) is placed in the second guide cavity and forms a sliding fit. A first movable hole (12) communicating with its inner cavity is provided on one side of the positioning beam (3). The handle (16) passes through the first movable hole (12) and is fixedly connected to the second sliding plate (42). A lock head (40) adapted to the positioning hole (17) is fixed at one end of the second sliding plate (42) away from the mounting base (15). A second bend (44) is provided at the other end of the second sliding plate (42). One end of the second tension spring (41) is hooked on the second bend (44), and the other end of the second tension spring (41) is hooked on the positioning beam (3).

4. The switchgear with sensing interlocking function according to claim 3, characterized in that: The lock head (40) includes a lock body (47) and a movable rod (48). The movable rod (48) is slidably disposed in the inner cavity of the lock body (47). One end of the inner cavity of the lock body (47) is fixed with an end seat (49). The end of the movable rod (48) facing the positioning hole (17) is provided with a second latch (51). The outer wall of the lock body (47) is provided with a threaded hole communicating with its inner cavity. A set screw (46) is connected in the threaded hole. The outer wall of the second latch (51) is provided with a guide groove (45). The end of the set screw (46) is embedded in the guide groove (45). The movable rod (48) is sleeved with a second spring (50). The second spring (50) abuts between the second latch (51) and the end seat (49).

5. The switchgear with sensing interlocking function according to claim 1, characterized in that: Two rows of stationary contact seats (8) are installed on the partition (9) of the compartment (1). The inner cavity of the compartment (1) is provided with a valve mechanism (7) for covering the stationary contact seats (8). The valve mechanism (7) is associated with the vacuum circuit breaker (2).

6. The switchgear with sensing interlocking function according to claim 5, characterized in that: The valve mechanism (7) includes a first insulating plate (53) and a second insulating plate (58) arranged in parallel. Guide rods (57) are symmetrically fixed on both sides of the partition (9). The first insulating plate (53) and the second insulating plate (58) are slidably disposed between the two sets of guide rods (57). The vacuum circuit breaker (2) is symmetrically disposed on both sides of the drive plate (6). The inner walls of the compartment (1) are fixed with opening and closing components (54). The opening and closing components (54) are associated with the corresponding drive plate (6). The first insulating plate (53) is hinged to both ends with a first connecting plate (55). The second insulating plate (58) is hinged to both ends with a second connecting plate (56). The first connecting plate (55) and the second connecting plate (56) are associated with the corresponding opening and closing components (54).

7. The switchgear with sensing interlocking function according to claim 6, characterized in that: The opening and closing assembly (54) includes a fixed base (59), which is fixedly installed on the inner wall of the compartment (1). A second rotating shaft (64) is installed on one side of the fixed base (59). A first shear plate (65) and a second shear plate (66) are rotatably installed on the second rotating shaft (64). The end of the first shear plate (65) is hinged to the first connecting plate (55), and the end of the second shear plate (66) is hinged to the second connecting plate (56). A torsion spring (62) is sleeved on the second rotating shaft (64). The two torsion arms of the torsion spring (62) are hooked and connected to the first shear plate (65) and the second shear plate (66) respectively.

8. The switchgear with sensing interlocking function according to claim 7, characterized in that: The drive plate (6) is provided with a first sidewall (60) and a second sidewall (61) that are parallel to each other. The first sidewall (60) and the second sidewall (61) are both provided with a guide portion (68) at one end near the partition (9). A guide inclined plate (67) is provided on one side of the guide portion (68). A first force-applying shaft (63) is installed on one side of the first shear plate (65). The first force-applying shaft (63) is in rolling contact with the second sidewall (61). A second force-applying shaft (69) is installed on one side of the second shear plate (66). The second force-applying shaft (69) is in rolling contact with the first sidewall (60).

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