Isolation circuit breaker interlocking structure and high-voltage switch cabinet

Abstract

The invention provides an isolation circuit breaker interlocking structure and a high-voltage switch cabinet. The interlocking structure comprises a connecting rod mechanism, a linkage plate, a middle door lock catch, a middle door limiting rod, a handcart limiting rod and a limiting baffle. The linkage plate, the middle door limiting rod, the handcart limiting rod and the limiting baffle are connected through the linkage mechanism, and the linkage plate is linked with the working state of the isolation circuit breaker to drive the middle door limiting rod, the handcart limiting rod and the limiting baffle to correspondingly achieve interlocking and unlocking of the middle door, the handcart and the grounding switch. According to the interlocking structure, due to the fact that various interlocks are tightly connected, the interlocking structure is simple and compact in structure, convenient to operate and safer and more reliable in performance.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switchgear, and in particular to an isolating circuit breaker interlocking structure and a high-voltage switch cabinet. Background Art

[0002] High-voltage switchgear should have extremely high safety and anti-misoperation functions to avoid casualties and material losses. Therefore, the switch cabinet should have a complete anti-misoperation mechanical interlocking device: that is, it has the "five protection" functions of preventing the accidental opening and closing of circuit breakers, preventing the opening and closing of disconnectors with charges, preventing the supply of power with grounding, preventing the grounding with power on, and preventing the accidental entry into the energized interval, so as to effectively prevent the occurrence of electrical misoperation accidents.

[0003] In traditional high-voltage electrical switchgear, the interlocking structures of the five protection functions are set separately from each other, resulting in a complex internal structure of the isolating circuit breaker, with more parts and larger size. Summary of the invention

[0004] The object of the present invention is to provide an isolating circuit breaker interlocking structure with simple structure, convenient operation and safe and reliable performance, and a high-voltage switch cabinet using the interlocking structure.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] As a first aspect, the present invention provides an interlocking structure for an isolating circuit breaker, comprising a connecting rod mechanism, a linkage plate, a middle door lock, a middle door limiting rod, a trolley limiting rod, and a limiting baffle; the connecting rod mechanism comprises a connecting rod seat for fixing to a frame in an operating mechanism in the isolating circuit breaker, a connecting rod shaft rotatably arranged on the connecting rod seat, and a first connecting rod and a second connecting rod connected to both ends of the connecting rod shaft; the linkage plate is connected to one end of the first connecting rod and is configured to slide in a horizontal direction as the isolating circuit breaker switches between a working position and an isolating position; the middle door lock is used to be installed on the inner side of the middle door; the middle door limiting rod is connected to one end of the second connecting rod, and can extend into the middle door lock when the isolating circuit breaker is in the working position, and when the isolating circuit breaker is in the isolating position The trolley limit rod is connected to the other end of the second connecting rod, and can move downward to extend into the preset limit notch on the trolley lock rod when the isolating circuit breaker is in the working position, and move upward to be drawn out of the limit notch when the isolating circuit breaker is in the isolating position; the grounding switch operation blocking shaft is used to be connected to the grounding switch to operate the opening and closing of the grounding switch under the action of the grounding operating handle, and is configured to be movable in the up and down directions; the limit baffle is connected to the other end of the first connecting rod, and is configured to slide in the horizontal direction, and is stopped above the grounding switch operation blocking shaft when the isolating circuit breaker is in the working position, and makes way for the grounding switch operation blocking shaft to move upward when the isolating circuit breaker is in the isolating position.

[0007] In one embodiment, the connecting rod seat includes a seat plate, a fixing plate formed by bending one end of the seat plate upward, a pair of side plates formed by bending both sides of the seat plate upward, and a limiting plate formed by bending the other end of the seat plate laterally; the pair of side plates are provided with axial holes, and the connecting rod shaft is passed through the axial holes; the limiting plate is provided with a limiting hole, and the upper end of the trolley limiting rod is passed through the limiting hole.

[0008] In one embodiment, the interlocking structure further comprises a support plate for fixing to the frame, the support plate is provided with a clearance hole, and an end of the limit baffle away from the first connecting rod is placed in the clearance hole and can pass through the clearance hole.

[0009] In one embodiment, the linkage plate and the limit baffle are both provided with waist-shaped holes, and the waist-shaped holes extend along the width direction of the plate, and the linkage plate and the limit baffle are connected to the first connecting rod through their respective waist-shaped holes.

[0010] In one embodiment, the interlocking structure also includes an isolation operation limit assembly, which includes a horizontally rotatable limit arm, which is horizontally placed in front of the operating contact on the isolation motor of the isolation circuit breaker, and is configured to be rotatable to release the docking position between the isolation operation handle and the operating contact under the pushing action of the isolation operation handle when the isolation circuit breaker is in the isolation position, and to block the isolation operation handle from entering the docking position when the isolation circuit breaker is in the working position.

[0011] In one embodiment, the isolation operation limit assembly also includes a mounting seat and a reset spring, the mounting seat is used to be fixed to the frame of the operating mechanism, the limit arm is rotatably mounted on the mounting seat, and the reset spring is used to reset the limit arm horizontally in front of the operating contact when the force of the isolation operation handle on the limit arm is cancelled.

[0012] In one embodiment, the isolation operation limit assembly also includes an auxiliary arm connected to the limit arm at an angle, and the reset spring is a tension spring, and the two ends of the tension spring are respectively connected to the mounting seat and the auxiliary arm; the interlocking structure also includes a grounding switch linkage rod, and the grounding switch linkage rod is configured to move up and down with the opening and closing of the grounding switch, and a stop plate is fixed to the top of the grounding switch linkage rod. The stop plate can move up to block the rotation path of the auxiliary arm when the grounding switch is closed to limit the rotation of the auxiliary arm, and move down to make way for the rotation path of the auxiliary arm when the grounding switch is opened.

[0013] In one embodiment, the isolation operation limit assembly also includes a crank arm, which includes a clamping rod and a linkage touch rod. The clamping rod is abutted against one side of the limit arm, one end of the linkage touch rod is connected to the clamping rod, and the other end of the linkage touch rod passes through the operating mechanism during installation and can be pushed by the middle door lock when the middle door is closed, so that the clamping rod rotates away from the rotation path of the limit arm.

[0014] In one embodiment, the angle between the linkage touch rod and the abutment rod is an acute angle, the crank arm is further provided with a counterweight block at the connection position between the linkage touch rod and the abutment rod, and the linkage touch rod gradually shrinks in a direction away from the counterweight block.

[0015] As a second aspect, the present invention also provides a high-voltage switch cabinet, comprising a cabinet body, an isolating circuit breaker, a middle door, a grounding switch, and the above-mentioned isolating circuit breaker interlocking structure, the isolating circuit breaker is provided with an operating mechanism, the operating mechanism comprises a box body, a frame arranged in the box body, an isolating motor fixed on the frame body and a locking rod telescopically arranged in the box body, the locking rod can be stopped on the inner side of the cabinet body when extended, the connecting rod seat is fixed on the frame body, the linkage plate and the limit baffle are both penetrated through the frame body, and the middle door lock is fixed on the inner side of the middle door.

[0016] The beneficial effects brought by the technical solution provided by the present invention are:

[0017] 1. The interlocking structure of the isolating circuit breaker of the present invention connects the linkage plate, the middle door limit rod, the trolley limit rod and the limit baffle by setting a connecting rod mechanism. The linkage plate is linked with the working state of the isolating circuit breaker to drive the middle door limit rod, the trolley limit rod and the limit baffle to correspondingly realize the interlocking and unlocking of the middle door, the trolley and the earthing switch, thereby realizing the working state linkage of the middle door, the trolley and the earthing switch with the isolating circuit breaker. Since various interlocks are closely connected, the interlocking structure of the present invention has a simple and compact structure, is easy to operate, and has safer and more reliable performance.

[0018] 2. The isolating circuit breaker interlocking structure of the present invention is also provided with an isolating operation limit structure, and is interlocked with the opening and closing of the middle door and the opening and closing of the grounding switch, so that the isolating circuit breaker can be operated for isolation only when it is in the isolating position and the grounding switch is open, further improving the operational safety of the high-voltage switch cabinet, preventing misoperation, and avoiding damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments of the present invention are briefly introduced below.

[0020] Figure 1 A schematic structural diagram of an isolating circuit breaker interlocking structure in a working position provided by an embodiment of the present invention;

[0021] Figure 2 for Figure 1 The structural schematic diagram of the isolating circuit breaker interlocking structure in the isolating position is shown;

[0022] Figure 3 A schematic diagram of the structure of a connecting rod mechanism provided by an embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of a connecting rod seat provided in one embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of a linkage plate provided by an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the structure of a limit baffle provided in one embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the structure of a support plate provided in one embodiment of the present invention;

[0027] Figure 8 A schematic diagram of the structure of a limit fork provided in one embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of the structure of a linkage touch rod provided by an embodiment of the present invention;

[0029] Fig.10 A schematic diagram of the structure of a mounting base provided by an embodiment of the present invention;

[0030] Fig.11 A schematic diagram of the structure of the interlocking structure of the operating mechanism and the earthing switch linkage assembly provided by an embodiment of the present invention;

[0031] Fig.12 for Fig.11 A structural schematic diagram of another state of the interlocking structure shown. DETAILED DESCRIPTION

[0032] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0033] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0034] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "connected" may be directly connected or indirectly connected through intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0035] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0036] See also Figures 1 to 10 , and combined with Fig.11 and Fig.12 The present invention relates to an isolating circuit breaker interlocking structure (hereinafter referred to as "interlocking structure"), which is used in a high-voltage switch cabinet to realize the interlocking function between the isolating circuit breaker and the cabinet body, middle door and grounding switch of the high-voltage switch cabinet, avoid misoperation and improve operation safety.

[0037] It should be understood that the isolating circuit breaker of the present invention includes a trolley frame and three-phase poles and an operating mechanism all mounted on the trolley frame. The three-phase poles, the operating mechanism and the trolley frame constitute a pluggable isolating circuit breaker. The operating mechanism is used to switch the working state of the three-phase poles, that is, to put the three-phase poles of the isolating circuit breaker in the working position or the isolating position. An isolating motor is arranged in the operating mechanism, and the isolating motor is provided with an operating contact, which is used to operate the isolation by plugging the isolating operating handle with the operating contact. Correspondingly, in addition to the isolating circuit breaker, the high-voltage switch cabinet also includes a cabinet body, a grounding switch, and a current transformer. The isolating circuit breaker is pluggable in the cabinet body, and a middle door is arranged in the cabinet body corresponding to the isolating circuit breaker to protect it.

[0038] The interlocking structure of the present invention is mainly used to realize the middle door interlocking function, the trolley interlocking function, the grounding switch interlocking function and the isolation operation interlocking function, and the realization of each interlocking function is related to the working state of the isolation circuit breaker to improve the operation safety.

[0039] See also Figure 1Specifically, the interlocking structure 100 mainly includes the following components: a connecting rod mechanism 10, a linkage plate 20, a grounding operation stop assembly 60, a grounding switch linkage assembly 50, a middle door locking assembly 30 and a trolley limit rod 40.

[0040] Please combine Figure 3 , wherein the connecting rod mechanism 10 includes a connecting rod seat 11, a connecting rod shaft 12, a first connecting rod 13 and a second connecting rod 14, the connecting rod seat 11 is used to be installed on the frame 500 in the operating mechanism 1000, the connecting rod shaft 12 is rotatably penetrated through the connecting rod seat 11, the first connecting rod 13 and the second connecting rod 14 are connected to the two ends of the connecting rod shaft 12, preferably, the middle parts of the first connecting rod 13 and the second connecting rod 14 are connected to the connecting rod shaft 12.

[0041] The linkage plate 20 is connected to one end of the first connecting rod 13. The linkage plate 20 is also used to be linked with the working state of the isolating circuit breaker, and slides horizontally when the isolating circuit breaker switches between the working position and the isolating position. In this embodiment, the linkage plate 20 slides in the left and right direction.

[0042] The middle door locking assembly 30 includes a middle door lock catch 31 and a middle door limiting rod 32 which can be inserted into the middle door lock catch 31 .

[0043] The middle door lock catch 31 is used to be fixed on the inner side of the middle door. The middle door lock catch 31 is generally U-shaped, and is fixed to the middle door with its open end facing the middle door.

[0044] The middle door limiting rod 32 is connected to one end of the second connecting rod 14 and is configured to move in the up and down directions. When the isolating circuit breaker is switched from the isolating position to the working position, the middle door limiting rod 32 can penetrate into the middle door lock buckle 31 when moving upward, and block the moving path of the middle door lock buckle 31 during the middle door opening process to prevent the middle door from being opened; when the isolating circuit breaker is switched from the working position to the isolating position, the middle door limiting rod 32 moves downward and disengages from the middle door lock buckle 31, leaving the moving path for the middle door lock buckle 31 to move outward, and the middle door can be opened.

[0045] The trolley limiting rod 40 is connected to the other end of the second connecting rod 14 and is configured to move in the up-down direction. It can be understood that since the trolley limiting rod 40 and the middle door limiting rod 32 are connected to the two ends of the second connecting rod 14, the moving direction of the trolley limiting rod 40 is opposite to that of the middle door limiting rod 32. When the trolley limiting rod 40 moves downward to a predetermined distance, it is inserted into the preset limiting notch on the trolley lock rod 300, restricting the trolley lock rod 300 from retracting inward, and the trolley cannot be withdrawn from the cabinet; when the trolley limiting rod 40 moves upward and is withdrawn from the limiting notch, the restriction of the trolley lock rod 300 is released, and the trolley can be withdrawn from the cabinet.

[0046] The grounding switch linkage assembly 50 includes the grounding switch operation blocking shaft 51, which is used to be connected to the grounding switch to operate the opening and closing of the grounding switch under the action of the grounding operating handle, and is configured to be movable in the up and down directions.

[0047] The grounding operation stop assembly 60 includes a limit baffle 61, which is connected to the other end of the first connecting rod 13 and is configured to slide in the horizontal direction, and is stopped above the grounding switch operation blocking shaft 51 when the isolating circuit breaker is in the working position, and clears the path for the grounding switch operation blocking shaft 51 to move upward when the isolating circuit breaker is in the isolating position. It can be understood that since the limit baffle 61 and the linkage plate 20 are connected to both ends of the first connecting rod 13, the sliding direction of the limit baffle is opposite to the sliding direction of the linkage plate 20, that is, when the linkage plate 20 slides from left to right, the limit baffle slides from right to left, and vice versa, when the linkage plate 20 slides from right to left, the limit baffle slides from left to right.

[0048] It can be understood that in this embodiment, the rotation of the connecting rod is converted into the linear movement of the limiting baffle, the middle door limiting rod 32 and the trolley limiting rod 40 through the necessary limiting components.

[0049] Among them, the linkage plate 20 and the limit baffle 61 are both penetrated through the frame 500 of the operating mechanism 1000, thereby limiting its sliding in the left and right directions. The top end of the middle door limit rod 32 is penetrated through the top end of the box of the operating mechanism 1000, and the trolley limit rod 40 passes through the preset limit hole 1141 on the connecting rod seat 11 to limit the middle door limit rod 32 and the trolley limit rod 40 to move in the up and down directions.

[0050] The working principle of the interlocking structure 100 of the present invention is as follows:

[0051] Please combine Figure 1 and Fig.12 When the isolating circuit breaker is in the working position, the linkage plate 20 is located at its leftmost position, the upper end of the middle door limiting rod 32 is at the highest position and inserted into the middle door lock buckle 31, the lower end of the trolley limiting rod 40 is at the lowest position and inserted into the limiting notch of the trolley lock rod 300, and the limiting baffle is at the rightmost position and blocks the top of the grounding switch operation blocking shaft 51.

[0052] Please combine Figure 2 and Fig.11When the isolating circuit breaker switches from the working position to the isolating position, the linkage plate 20 slides from left to right, driving the first connecting rod 13 to rotate clockwise. Driven by the first connecting rod 13, the limit baffle moves from right to left, leaving the moving path for the grounding switch operation blocking shaft 51 to move upward, and the grounding operating handle can be inserted to operate the grounding switch. The second connecting rod 14 rotates clockwise under the drive of the first connecting rod 13, thereby causing the middle door limit rod 32 to move downward and the trolley limit rod 40 to move upward, thereby releasing the lock on the middle door and the trolley, so that the middle door can be opened and the trolley can be pulled out of the high-voltage switch cabinet.

[0053] On the contrary, when the isolating circuit breaker switches from the isolating position to the working position, the linkage plate 20 slides from right to left, driving the first connecting rod 13 to rotate counterclockwise. Driven by the first connecting rod 13, the limit baffle 61 moves from left to right and moves to the top of the grounding switch operation blocking shaft 51 to limit the upward movement of the grounding switch operation blocking shaft 51. At this time, the grounding operating handle cannot be inserted to operate the opening and closing of the grounding switch. The second connecting rod 14 rotates counterclockwise under the drive of the first connecting rod 13, thereby causing the middle door limit rod 32 to move up and the trolley limit rod 40 to move down, thereby completing the locking of the middle door and the trolley, so that the middle door cannot be opened and the trolley cannot be withdrawn from the high-voltage switch cabinet.

[0054] As can be seen from the above, the interlocking structure 100 of the present invention connects the linkage plate 20, the middle door limit rod 32, the trolley limit rod 40 and the limit baffle 61 by setting a connecting rod mechanism 10, and drives the middle door limit rod 32, the trolley limit rod 40 and the limit baffle to correspondingly realize the interlocking and unlocking of the middle door, the trolley and the earthing switch through the linkage plate 20 and the working state of the isolating circuit breaker, thereby realizing the linkage of the working state of the middle door, the trolley and the earthing switch with the isolating circuit breaker. Since various interlocks are closely connected, the interlocking structure 100 of the present invention has a simple and compact structure, is easy to operate, and has safer and more reliable performance.

[0055] Please combine Figure 4 In one embodiment, the connecting rod seat 11 includes a seat plate 110, a fixing plate formed by bending one end of the seat plate 110 upward, a pair of side plates 112 formed by bending both sides of the seat plate 110 upward, and a limiting plate 114 formed by bending the other end of the seat plate 110 horizontally. The fixing plate is used to be installed on the frame 500. The pair of side plates 112 are provided with shaft holes, and the connecting rod shaft 12 is inserted into the shaft holes. The limiting plate 114 is provided with the above-mentioned limiting hole 1141, and the upper end of the trolley limiting rod 40 is inserted into the limiting hole 1141, so as to limit the activity trajectory of the trolley limiting rod 40 and convert the rotation into up and down movement.

[0056] Please combine Figure 7 and Fig.11In one embodiment, the grounding operation stop assembly 60 further includes a support plate 62 for fixing to the frame 500. The support plate 62 includes a main body 621 and a fixing portion 622. The fixing portion 622 is formed by bending the two ends of the main body 621 and is used to fix to the frame 500. The main body 621 is provided with a clearance hole 6211. The end of the limit baffle 61 away from the first connecting rod 13 is placed in the clearance hole and can pass through the clearance hole. Preferably, the limit baffle 61 is bent to form a stop portion 611, which blocks above the linkage rod 52, increases the lateral size of the blocking portion, ensures the blocking effect, and further improves the reliability of the device.

[0057] Please combine Figure 5 and Figure 6 In one embodiment, the linkage plate 20 and the limit baffle 61 are both provided with waist-shaped holes 21, 612, and the waist-shaped holes 21, 612 serve as connecting holes and extend along the width direction of the plate (that is, the height direction of the isolating circuit breaker). The linkage plate 20 and the limit baffle 61 are connected to the first connecting rod 13 through their respective waist-shaped holes, thereby facilitating the assembly of the linkage plate 20 and the limit baffle with the connecting rod mechanism 10.

[0058] Furthermore, the interlocking structure 100 also includes an isolation operation limit assembly 70, which is used to realize the linkage between the isolation operation and the opening and closing of the middle door and the opening and closing of the earthing switch. The isolation can only be operated when the middle door is closed and the earthing switch is opened, thereby avoiding misoperation, further improving the operational safety of the high-voltage switchgear, avoiding damage to the equipment due to misoperation, and avoiding the risk of electric shock for operators.

[0059] Please combine Figure 8-Figure 10 The isolation operation limit assembly 70 includes a horizontally rotatable limit arm 711, which is horizontally placed in front of the operating contact 210 on the isolation motor 200 of the isolation circuit breaker, and is configured to rotate to release the docking position between the isolation operation handle and the operating contact 210 under the pushing action of the isolation operation handle when the isolation circuit breaker is in the isolation position, and block the isolation operation handle from entering the docking position when the isolation circuit breaker is in the working position.

[0060] In one embodiment, the isolation operation limit assembly 70 also includes a mounting seat 73 and a reset spring (not marked, the same below), the mounting seat 73 is used to be fixed to the frame 500 of the operating mechanism 1000, the limit arm 711 is rotatably mounted on the mounting seat 73, and the reset spring is used to reset the limit arm 711 horizontally in front of the operating contact 210 when the force of the isolation operating handle on the limit arm 711 is cancelled.

[0061] In one embodiment, the isolation operation limit assembly 70 also includes an auxiliary arm 712 connected to the limit arm 711 at an angle, and the reset spring is a tension spring, and the two ends of the tension spring are respectively connected to the mounting seat 73 and the auxiliary arm 712; the interlocking structure 100 also includes a grounding switch linkage rod 52, and the grounding switch linkage rod 52 is configured to move up and down with the opening and closing of the grounding switch, and a stop plate 53 is fixed to the top of the grounding switch linkage rod 52. The stop plate 53 can move up to block the rotation path of the auxiliary arm 712 when the grounding switch is closed to limit the rotation of the auxiliary arm 712, and move down to make way for the rotation path of the auxiliary arm 712 when the grounding switch is opened.

[0062] The interlocking process of the above isolation operation, middle door opening and closing, and earthing switch is as follows:

[0063] When the middle door is opened, the abutting rod 722 abuts against the limit arm 711 to restrict its rotation, and the isolation operating handle cannot be inserted to operate the isolation motor 200. During the closing process of the middle door, the middle door lock 31 on the inner side of the middle door moves inward, pushing the linkage contact rod 721 to extend to one end of the top of the operating mechanism 1000, causing the linkage contact rod 721 to rotate clockwise, and the abutting rod 722 tilts upward and gradually leaves the rotation path of the limit arm 711. When the middle door is completely closed, the isolation operating handle can be inserted to operate the isolation motor 200 for isolation operation. When the middle door is opened, the middle door lock 31 moves outward, the force acting on the linkage contact rod 721 is cancelled, the crank arm 72 returns to its position under the action of its own gravity, and the abutting rod 722 abuts against the limit rod.

[0064] When the grounding switch is closed, the grounding switch linkage rod 52 moves up so that its stop plate 53 is located within the rotation path of the auxiliary arm 712, and the auxiliary arm 712 cannot rotate. At this time, the isolation operating handle cannot be inserted to operate isolation; when the grounding switch is opened, the grounding switch linkage rod 52 moves down so that its stop plate 53 is located below the auxiliary arm 712, making way for the rotation path of the auxiliary arm 712. At this time, the isolation operating handle can be inserted to operate isolation.

[0065] The limiting arm 711 and the auxiliary arm 712 are integrally formed, and the angle between the two is an obtuse angle, forming a fork-shaped limiting member 71, so that they can rotate synchronously.

[0066] In one embodiment, the mounting seat 73 includes a mounting plate 731, a fixing plate 732 formed by bending the mounting plate 731 downward, and an extension arm 733 connected to one side of the mounting plate 731, the mounting plate 731 is provided with a connecting shaft hole 7311 for installing a connecting shaft, the fixing plate is used to be fixed to the frame 500, and the extension arm 733 is provided with a spring connecting hole.

[0067] The fork-shaped stopper 71 is rotatably mounted on the mounting plate 731 by inserting the connecting shaft into the connecting shaft hole 7311. The auxiliary arm 712 is provided with a plurality of spring connection holes 7121 along its length direction, and the two ends of the tension spring are respectively hooked in the spring connection holes of the extension arm 733 and the auxiliary arm 712. Among them, by providing a plurality of spring connection holes 7121 on the auxiliary arm 712, the tension spring can be hooked in the corresponding spring connection hole 7121 according to the required elastic force, so as to achieve the elastic force adjustment of the reset spring and ensure that the stopper arm 711 can return to its position accurately.

[0068] In one embodiment, the isolation operation limit assembly 70 also includes a crank arm 72, and the crank arm 72 includes a clamping rod 722 and a linkage touch rod 721. The clamping rod 722 is abutted against one side of the limit arm 711, and one end of the linkage touch rod 721 is connected to the clamping rod 722. The other end of the linkage touch rod 721 passes through the operating mechanism 1000 during installation and can be pushed by the middle door lock 31 when the middle door is closed, so that the clamping rod 722 rotates to leave the rotation path of the limit arm 711.

[0069] In one embodiment, the angle between the linkage contact rod 721 and the clamping rod 722 is an acute angle, and the crank arm 72 is further provided with a counterweight block at the connection position between the linkage contact rod 721 and the clamping rod 722. The linkage contact rod 721 gradually shrinks in the direction away from the counterweight block, so that the center of gravity of the crank arm 72 is lowered, and the crank arm automatically returns to its original position under the action of gravity after the external force applied to the linkage contact rod 721 is removed, so that the clamping rod 722 presses against the limit arm 711, preventing the isolation operating handle from entering the docking position between it and the operating contact 210.

[0070] It should be noted that, in the isolation operation limit assembly 70 of the present invention, the fork-shaped limit member 71 rotates in the horizontal direction, and the crank arm 72 rotates in the vertical direction. The interlocking of the isolation operation is achieved by rotating in two directions, which makes full use of the internal space of the operating mechanism 1000 and makes the structure of the isolation circuit breaker more compact.

[0071] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions invented in the present invention (but not limited to) to form a technical solution.

[0072] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. An isolating circuit breaker interlocking structure, used to realize the interlocking between the isolating circuit breaker and the cabinet, grounding switch and middle door in the high-voltage switch cabinet, characterized in that: include: The connecting rod mechanism comprises a connecting rod seat for fixing to a frame in an operating mechanism in the isolating circuit breaker, a connecting rod shaft rotatably arranged on the connecting rod seat, and a first connecting rod and a second connecting rod connected to both ends of the connecting rod shaft; A linkage plate connected to one end of the first connecting rod and configured to slide in a horizontal direction as the isolating circuit breaker switches between a working position and an isolating position; Middle door lock, used to be installed on the inner side of the middle door; A middle door limit rod is connected to one end of the second connecting rod and can extend into the middle door lock catch when the isolating circuit breaker is in the working position, and clears a moving path for the middle door lock catch to move outward when the isolating circuit breaker is in the isolating position; The trolley limit rod is connected to the other end of the second connecting rod, and can move downward to extend into a preset limit notch on the trolley lock rod when the isolating circuit breaker is in the working position, and move upward to be drawn out of the limit notch when the isolating circuit breaker is in the isolating position; The grounding switch operation blocking shaft is used to be connected to the grounding switch to operate the opening and closing of the grounding switch under the action of the grounding operating handle, and is arranged to be movable in the up and down directions; The limit baffle is connected to the other end of the first connecting rod and is configured to slide in the horizontal direction. When the isolating circuit breaker is in the working position, it stops above the grounding switch operation blocking shaft, and when the isolating circuit breaker is in the isolating position, it makes way for the grounding switch operation blocking shaft to move upward.

2. The isolating circuit breaker interlocking structure according to claim 1, characterized in that: The connecting rod seat comprises a seat plate, a fixing plate formed by bending one end of the seat plate upward, a pair of side plates formed by bending both sides of the seat plate upward, and a limiting plate formed by bending the other end of the seat plate horizontally; The pair of side plates are provided with shaft holes, and the connecting rod shaft is passed through the shaft holes; The limiting plate is provided with a limiting hole, and the upper end of the trolley limiting rod is passed through the limiting hole.

3. The isolating circuit breaker interlocking structure according to claim 1, characterized in that: It also includes a support plate for fixing to the frame body, the support plate is provided with a clearance hole, and the end of the limit baffle away from the first connecting rod is placed in the clearance hole and can pass through the clearance hole.

4. The isolating circuit breaker interlocking structure according to claim 1, characterized in that: The linkage plate and the limit baffle are both provided with waist-shaped holes, and the waist-shaped holes extend along the width direction of the plate. The linkage plate and the limit baffle are connected to the first connecting rod through their respective waist-shaped holes.

5. The isolating circuit breaker interlocking structure according to claim 1, characterized in that: It also includes an isolation operation limit assembly, which includes a horizontally rotatable limit arm, which is horizontally placed in front of the operating contact on the isolation motor of the isolation circuit breaker, and is configured to be able to rotate to release the docking position between the isolation operation handle and the operating contact under the pushing action of the isolation operation handle when the isolation circuit breaker is in the isolation position, and to block the isolation operation handle from entering the docking position when the isolation circuit breaker is in the working position.

6. The isolating circuit breaker interlocking structure according to claim 5, characterized in that: The isolation operation limit assembly also includes a mounting seat and a reset spring. The mounting seat is used to be fixed to the frame of the operating mechanism. The limit arm is rotatably mounted on the mounting seat. The reset spring is used to reset the limit arm horizontally in front of the operating contact when the force of the isolation operation handle on the limit arm is cancelled.

7. The isolating circuit breaker interlocking structure according to claim 6, characterized in that: The isolation operation limit assembly further includes an auxiliary arm connected to the limit arm at an angle, and the reset spring is a tension spring, and both ends of the tension spring are respectively connected to the mounting seat and the auxiliary arm; It also includes a grounding switch linkage rod, which is configured to move up and down with the opening and closing of the grounding switch. A stop plate is fixed to the top of the grounding switch linkage rod. The stop plate can move up to block the rotation path of the auxiliary arm when the grounding switch is closed to limit the rotation of the auxiliary arm, and move down to make way for the rotation path of the auxiliary arm when the grounding switch is opened.

8. The isolating circuit breaker interlocking structure according to claim 5, characterized in that: The isolation operation limit assembly also includes a crank arm, which includes a clamping rod and a linkage touch rod. The clamping rod is abutted against one side of the limit arm, one end of the linkage touch rod is connected to the clamping rod, and the other end of the linkage touch rod passes through the operating mechanism during installation and can be pushed by the middle door lock when the middle door is closed, so that the clamping rod rotates away from the rotation path of the limit arm.

9. The isolating circuit breaker interlocking structure according to claim 8, characterized in that: The angle between the linkage touch rod and the abutment rod is an acute angle, and the crank arm is further provided with a counterweight block at the connection position between the linkage touch rod and the abutment rod, and the linkage touch rod gradually shrinks in the direction away from the counterweight block.

10. A high-voltage switch cabinet, comprising a cabinet, an isolating circuit breaker, a middle door and a grounding switch, wherein the isolating circuit breaker is provided with an operating mechanism, wherein the operating mechanism comprises a box, a frame arranged in the box, an isolating motor fixed on the frame and a locking rod retractably arranged in the box, wherein the locking rod can be stopped on the inner side of the cabinet when extended, characterized in that: It also includes the isolating circuit breaker interlocking structure according to any one of claims 1 to 9, wherein the connecting rod seat is fixed on the frame, the linkage plate and the limit baffle are both passed through the frame, and the middle door lock is fixed on the inner side of the middle door.

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