High-low voltage linkage switching protection switch

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a high-low voltage linkage switching protection switch which comprises a box body, and a linkage switch for controlling a high-voltage vacuum arc-extinguishing chamber structure and a low-voltage switch in a linkage mode is arranged in the box body. The linkage mechanism comprises a bistable electromagnet fixedly arranged in the box body and an L-shaped crank arm driven by an armature of the bistable electromagnet, one end of the armature of the bistable electromagnet is hinged with a transmission rod, the bottom end of the L-shaped crank arm close to the transmission rod is hinged with the transmission rod, one side of the transmission rod is provided with a switch-on and switch-off indication assembly, and the other side of the transmission rod is provided with a switch-off and switch-on indication assembly. A U-shaped lug is arranged at one end, far away from the transmission rod, of an armature of the bistable electromagnet; and the U-shaped lug is hinged with the bottom end of the close L-shaped crank arm. According to the utility model, the overall structure integration degree is high, simultaneous linkage switching of high voltage and low voltage is realized, the efficiency, the stability, the energy saving and emission reduction capability of an electric power system are further improved, in addition, an operator can rapidly and accurately know the state of current equipment, and the working efficiency and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a high- and low-voltage linkage switching protection switch. Background Art

[0002] Disconnectors, or circuit breakers, are vital components in power systems. Their core value lies in the effective control of the on-off state of the circuit to ensure the stable and safe operation of the entire power system. According to different application environments and requirements, disconnectors are divided into two types: high voltage and low voltage. High voltage switches are specifically used in high voltage power systems and are commonly found in substations, power plants, and transmission systems. Their function is to accurately control and switch the on-off state of high voltage circuits. Low voltage switches are widely used in circuit systems with lower voltages, such as homes, public buildings, and commercial places, to meet the basic needs of these places for circuit control.

[0003] However, relying solely on individual high-voltage or low-voltage switches will limit the flexibility and safety of the power system. This limitation is mainly reflected in the fact that they can only control circuits of a single voltage level, and cannot achieve linkage control between high-voltage and low-voltage circuits. This limitation not only reduces the flexibility of the system, but also increases the risk of misoperation, which may lead to power system failures or safety accidents.

[0004] In addition, the display structure of the device is not flexible, which makes it difficult to understand the actual status of the circuit breaker in a timely manner and may increase the difficulty and cost of maintenance. Utility Model Content

[0005] The utility model provides a high-low voltage linkage switching protection switch to solve the technical problems that the high voltage switch or the low voltage switch has poor control flexibility, is difficult to maintain and has high cost.

[0006] In order to solve the above problems, the high and low voltage linkage switching protection switch provided by the utility model adopts the following technical solutions:

[0007] A high-low voltage linkage switching protection switch comprises a box body, a high-voltage vacuum arc chamber structure on the box body, and a driving linkage mechanism arranged in the box body and driving the high-voltage vacuum arc chamber structure to close or open the switch. A low-voltage switch is arranged at the bottom of the box body, and the linkage mechanism is arranged between the high-voltage vacuum arc chamber structure and the low-voltage switch. A pull rod assembly cooperating with the linkage mechanism is arranged in the high-voltage vacuum arc chamber structure, and the low-voltage switch comprises a low-voltage transmission rod cooperating with the linkage mechanism.

[0008] The linkage mechanism includes a bistable electromagnet fixed in a box body and an L-shaped crank arm driven by an armature of the bistable electromagnet, one end of the armature of the bistable electromagnet is hingedly provided with a transmission rod, the bottom end of the L-shaped crank arm close to the transmission rod is hingedly connected to the transmission rod, a switch opening and closing indication component is provided on one side of the transmission rod, and a U-shaped ear is provided at the end of the armature of the bistable electromagnet away from the transmission rod, and the U-shaped ear is hinged to the bottom end of the adjacent L-shaped crank arm.

[0009] Furthermore, the opening and closing indication assembly includes a pin shaft fixedly arranged on one side of the transmission rod, and the box body is provided with a swing needle structure cooperating with the pin shaft.

[0010] Furthermore, the swing needle structure includes a rotating shaft passing through the side wall of the box body, a bearing for rotatably supporting the rotating shaft is provided on the side wall of the box body, a detachable pointer is provided at one end of the rotating shaft extending out of the box body, an indicator plate corresponding to the pointer is provided on the outer wall of the box body, a U-shaped linkage plate is provided at the other end of the rotating shaft, and the pin shaft passes through the U-shaped groove on the U-shaped linkage plate.

[0011] Furthermore, a threaded hole is provided on the end surface of one end of the rotating shaft extending out of the box body, and the pointer is detachably fixed by means of a bolt cooperating with the threaded hole.

[0012] Furthermore, the pull rod assembly includes an insulating pull rod, the insulating pull rod moves vertically to drive the moving contact, and the upper end of the L-shaped arm is linked with the bottom end of the insulating pull rod;

[0013] The top end of the low-pressure transmission rod correspondingly arranged below the transmission rod is fixedly connected to the transmission rod;

[0014] A low-pressure transmission plate is arranged at the bottom end of the U-shaped ear, and the top end of the low-pressure transmission rod correspondingly arranged below the low-pressure transmission plate is fixedly connected to the low-pressure transmission plate.

[0015] Furthermore, the insulating pull rod is provided with an overtravel spring, the insulating pull rod is provided with a spring limiting washer at the upper end of the overtravel spring, the insulating pull rod is provided with a sliding sleeve with a cylindrical sleeve, the bottom end of the overtravel spring is fixedly sleeved outside the cylindrical sleeve, and the L-shaped crank arm drives the cylindrical sleeve to move vertically.

[0016] Furthermore, there are two L-shaped arms corresponding to the insulating pull rod, which are arranged at intervals, and a first pin shaft is passed through the upper parts of the two L-shaped arms. An elongated waist hole is vertically provided at the lower part of the insulating pull rod. The first pin shaft passes through the elongated waist hole and the bottom end of the cylindrical sleeve is fixedly connected to the first pin shaft.

[0017] Furthermore, the box body is provided with an upper seat plate and a lower seat plate for fixing the bistable electromagnet, the bistable electromagnet is fixed between the upper seat plate and the lower seat plate, and the low-voltage switch is arranged below the lower seat plate.

[0018] The low-voltage transmission rod passes through the lower seat plate and the bottom end is fixedly connected to the moving block of the low-voltage switch.

[0019] Wherein, a guide slot hole is provided on the side plate of the upper seat plate, and the first pin shaft passes through the guide slot hole.

[0020] Furthermore, the L-shaped turning arm is hinged in the box body through a support shaft passing through the corner.

[0021] The beneficial effects of the high-low voltage linkage switching protection switch provided by the utility model are: the overall structure of the utility model has a high degree of integration, and the safety hazards caused by improper operation or component failure are avoided by accurately controlling the action and strength of each component, thereby enhancing the safety of the equipment. In addition, the efficient linkage control mechanism enables the equipment to quickly complete the operation during the opening or closing process, thereby reducing unnecessary energy consumption and improving energy utilization efficiency. The pointer on the pendulum needle structure and the indicator board on the outer wall of the box can intuitively display the state of the opening and closing, so that the operator can quickly and accurately understand the current state of the equipment, thereby improving work efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0023] Figure 1 This is a structural schematic diagram of a high-low voltage linkage switching protection switch of the utility model;

[0024] Figure 2 This is an internal schematic diagram of the high and low voltage linkage switching protection switch of the utility model;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle area C;

[0026] Figure 4 for Figure 2 Front view of the structure;

[0027] Figure 5 This is a partial internal schematic diagram of the high-low voltage linkage switching protection switch of the utility model;

[0028] Figure 6 for Figure 5 A partial enlarged view of the middle area A;

[0029] Figure 7 for Figure 5 A partial enlarged view of area B in the middle.

[0030] Description of reference numerals:

[0031] 1. Box body; 11. Opening and closing indication assembly; 111. Pin shaft; 12. Swing needle structure; 121. Rotating shaft; 122. Pointer; 123. U-shaped linkage plate; 124. Indicator plate; 13. Upper plate seat; 131. Guide slot hole; 14. Lower plate seat; 2. High-voltage vacuum arc chamber structure; 21. Pull rod assembly; 211. Insulating pull rod; 212. Overtravel spring; 213. Spring limit washer; 214. Cylindrical sleeve; 3. Low-voltage switch; 31. Low-voltage transmission rod; 32. Moving block; 4. Linkage mechanism; 41. L-shaped crank arm; 411. First pin shaft; 42. Transmission rod; 43. U-shaped ear; 44. Low-voltage transmission plate; 45. Bistable electromagnet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0034] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0035] Embodiment 1 of the high and low voltage linkage switching protection switch provided by the utility model:

[0036] like Figures 1 to 7 As shown,

[0037] A high-low voltage linkage switching protection switch comprises a box body 1, a high-voltage vacuum arc chamber structure 2 on the box body 1, and a driving linkage mechanism 4 which is arranged in the box body 1 and drives the high-voltage vacuum arc chamber structure 2 to close or open. A low-voltage switch 3 is arranged at the bottom of the box body 1, and the linkage mechanism 4 is arranged between the high-voltage vacuum arc chamber structure 2 and the low-voltage switch 3. A pull rod assembly 21 which cooperates with the linkage mechanism 4 is arranged in the high-voltage vacuum arc chamber structure 2, and the low-voltage switch 3 includes a low-voltage transmission rod 42 which cooperates with the linkage mechanism 4.

[0038] The linkage mechanism 4 includes a bistable electromagnet 45 fixed in the box body 1 and an L-shaped crank arm 41 driven by the armature of the bistable electromagnet 45, one end of the armature of the bistable electromagnet 45 is hinged with a transmission rod 42, the bottom end of the L-shaped crank arm 41 close to the transmission rod 42 is hingedly connected to the transmission rod 42, one side of the transmission rod 42 is provided with a switch opening and closing indication component 11, and the end of the armature of the bistable electromagnet 45 away from the transmission rod 42 is provided with a U-shaped ear 43, and the U-shaped ear is hinged to the bottom end of the adjacent L-shaped crank arm 41.

[0039] The L-shaped crank arm 41 is driven by the action of the bistable electromagnet 45, and then the transmission rod 42, the U-shaped ear and the low-voltage transmission plate and other components cooperate to achieve simultaneous opening or closing operations of multiple groups of high-voltage vacuum interrupter structures 2 and low-voltage switches 3, thereby achieving improved efficiency, stability, energy-saving and emission-reduction capabilities, adaptability and ease of operation of the power system.

[0040] In this embodiment, the opening and closing indicating assembly 11 includes a pin shaft 111 fixedly arranged on one side of the transmission rod 42 , and a swing needle structure 12 cooperating with the pin shaft 111 is provided on the box body 1 .

[0041] Among them, the swing needle structure 12 includes a rotating shaft 121 that passes through the side wall of the box body 1, and a bearing that rotatably supports the rotating shaft 121 is provided on the side wall of the box body 1. A detachable pointer 122 is provided at one end of the rotating shaft 121 that extends out of the box body 1, and an indicator plate 124 corresponding to the pointer 122 is provided on the outer wall of the box body 1. A U-shaped linkage plate 123 is provided at the other end of the rotating shaft 121, and the pin shaft 111 passes through the U-shaped groove on the U-shaped linkage plate 123.

[0042] A threaded hole is provided on the end surface of the rotating shaft 121 extending out of the box body 1, and the pointer 122 is detachably fixed by bolts fitting into the threaded hole.

[0043] The pointer 122 on the pendulum needle structure 12 and the indicator plate on the outer wall of the box body 1 can intuitively display the state of the opening and closing of the switch, so that the operator can quickly and accurately understand the current state of the equipment, thereby improving work efficiency and safety.

[0044] The pointer 122 is detachably fixed by bolts and threaded holes on the rotating shaft 121, which facilitates the replacement and maintenance of the pointer 122. If the pointer 122 is worn or damaged due to long-term use, it can be easily replaced without replacing the entire pendulum needle structure 12, reducing maintenance costs and complexity.

[0045] In this embodiment, the pull rod assembly includes an insulating pull rod 211, and the insulating pull rod 211 moves vertically to drive the moving contact, and the upper end of the L-shaped arm 41 is linked with the bottom end of the insulating pull rod 211;

[0046] The top end of the low-pressure transmission rod 42 correspondingly disposed below the transmission rod 42 is fixedly connected to the transmission rod 42;

[0047] A low-pressure transmission plate 44 is disposed at the bottom end of the U-shaped ear, and the top end of a low-pressure transmission rod 42 correspondingly disposed below the low-pressure transmission plate 44 is fixedly connected to the low-pressure transmission plate.

[0048] Among them, the insulating pull rod is provided with an over-travel spring 212, the insulating pull rod is provided with a spring limiting washer 213 at the upper end of the over-travel spring, the insulating pull rod is provided with a sliding sleeve with a cylindrical sleeve 214, the bottom end of the over-travel spring is fixedly sleeved outside the cylindrical sleeve 214, and the L-shaped crank arm 41 drives the cylindrical sleeve 214 to move vertically.

[0049] Among them, there are two L-shaped arms 41 corresponding to the insulating pull rod 211, and a first pin shaft 411 is penetrated between the upper parts of the two L-shaped arms 41. A long waist hole is vertically provided at the lower part of the insulating pull rod. The first pin shaft 411 penetrates the long waist hole and the bottom end of the cylindrical sleeve 214 is fixedly connected to the first pin shaft 411.

[0050] During specific use, the cylindrical sleeve 214 is driven to move vertically, thereby driving the insulating rod to move up and down, and the separation and connection of the arc extinguishing chamber structure is ensured by accurately controlling the up and down displacement of the insulating rod.

[0051] The box body 1 is provided with an upper seat plate and a lower seat plate for fixing the bistable electromagnet 45 . The bistable electromagnet 45 is fixed between the upper seat plate 13 and the lower seat plate 14 . The low-voltage switch 3 is arranged below the lower seat plate.

[0052] The low-voltage transmission rod 42 passes through the lower base plate 14 and the bottom end is fixedly connected to the moving block 32 of the low-voltage switch 3 .

[0053] A guide slot hole 131 is provided on the side plate of the upper seat plate 13 , and the first pin shaft 411 passes through the guide slot hole 131 .

[0054] Furthermore, the L-shaped arm 41 is hinged in the box body 1 via a support shaft penetrating the corner.

[0055] Specifically, two opposite L-shaped arms 41 are hinged between the two upper seat plates via a support shaft passing through the corners.

[0056] like Figure 4, during actual use, the armature of the bistable electromagnet 45 moves to the left, drives the L-shaped crank arm 41 to rotate counterclockwise around the support shaft through the transmission rod 42 and the U-shaped ear, and at the same time drives the insulating pull rod to move upward through the action of the L-shaped crank arm 41, so that the moving contact in the vacuum interrupter of the high-voltage vacuum interrupter structure 2 moves upward to close with the static contact. At the same time, the low-voltage transmission rod 42 drives the moving block to move to the right, so that the moving contact piece on the side of the moving block contacts the static contact piece in the low-voltage switch 3, completing the closing operation.

[0057] When the armature of the bistable electromagnet 45 moves to the right, it drives the L-shaped crank arm 41 to rotate clockwise around the support shaft through the transmission rod 42 and the U-shaped ear. At the same time, it drives the insulating pull rod to move downward through the action of the L-shaped crank arm 41, so that the moving contact in the vacuum interrupter of the high-voltage vacuum interrupter structure 2 moves upward to separate from the static contact. At the same time, the low-voltage transmission rod 42 drives the moving block to move to the left, so that the moving contact piece on the side of the moving block separates from the static contact piece in the low-voltage switch 3, completing the opening operation.

[0058] It should be noted that during the actual use process, when the armature of the bistable electromagnet 45 moves to the left, it drives the transmission rod 42 to move to the left at the same time, and the pin shaft 11 on the transmission rod 42 moves synchronously to drive the U-shaped linkage plate 123. The U-shaped linkage plate 123 drives the rotating shaft 121 to rotate and makes the pointer 122 point to the word "closed" on the indicator board. Similarly, the pointer 122 can point to the word "open".

[0059] According to the above description of this specification, those skilled in the art can also understand the following terms used, such as the terms indicating orientation or position relationship, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above terms of orientation or position relationship cannot be understood or interpreted as a limitation to the solution of the present invention.

[0060] In addition, in the description of this specification, the meaning of "a plurality" is at least two, such as two, three or more, etc., unless otherwise specifically and clearly defined.

Claims

1. A high-low voltage linkage switching protection switch, comprising a box body, a high-voltage vacuum interrupter structure on the box body, and a driving linkage mechanism disposed in the box body and driving the high-voltage vacuum interrupter structure to close or open the switch, characterized in that: A low-voltage switch is provided at the bottom of the box body, the linkage mechanism is provided between the high-voltage vacuum interrupter structure and the low-voltage switch, a pull rod assembly cooperating with the linkage mechanism is provided in the high-voltage vacuum interrupter structure, and the low-voltage switch includes a low-voltage transmission rod cooperating with the linkage mechanism; The linkage mechanism includes a bistable electromagnet fixed in a box body and an L-shaped crank arm driven by an armature of the bistable electromagnet, one end of the armature of the bistable electromagnet is hingedly provided with a transmission rod, the bottom end of the L-shaped crank arm close to the transmission rod is hingedly connected to the transmission rod, a switch opening and closing indication component is provided on one side of the transmission rod, and a U-shaped ear is provided at the end of the armature of the bistable electromagnet away from the transmission rod, and the U-shaped ear is hinged to the bottom end of the adjacent L-shaped crank arm.

2. The high-low voltage linkage switching protection switch according to claim 1 is characterized in that: The switch opening and closing indication assembly comprises a pin shaft fixedly arranged on one side of the transmission rod, and the box body is provided with a swing needle structure matched with the pin shaft.

3. The high-low voltage linkage switching protection switch according to claim 2 is characterized in that: The swing needle structure includes a rotating shaft passing through the side wall of the box body, a bearing for rotatably supporting the rotating shaft is provided on the side wall of the box body, a detachable pointer is provided at one end of the rotating shaft extending out of the box body, an indicator plate corresponding to the pointer is provided on the outer wall of the box body, a U-shaped linkage plate is provided at the other end of the rotating shaft, and the pin shaft passes through the U-shaped groove on the U-shaped linkage plate.

4. The high-low voltage linkage switching protection switch according to claim 3 is characterized in that: A threaded hole is arranged on the end surface of one end of the rotating shaft extending out of the box body, and the pointer is detachably fixed by bolts fitting into the threaded hole.

5. The high-low voltage linkage switching protection switch according to claim 1 is characterized in that: The pull rod assembly comprises an insulating pull rod, the insulating pull rod moves vertically to drive the moving contact, and the upper end of the L-shaped arm is linked with the bottom end of the insulating pull rod; The top end of the low-pressure transmission rod correspondingly arranged below the transmission rod is fixedly connected to the transmission rod; A low-pressure transmission plate is arranged at the bottom end of the U-shaped ear, and the top end of the low-pressure transmission rod correspondingly arranged below the low-pressure transmission plate is fixedly connected to the low-pressure transmission plate.

6. The high-low voltage linkage switching protection switch according to claim 5 is characterized in that: The insulating pull rod is provided with an overtravel spring, the insulating pull rod is provided with a spring limiting washer at the upper end of the overtravel spring, the insulating pull rod is provided with a sliding sleeve with a cylindrical sleeve, the bottom end of the overtravel spring is fixedly sleeved outside the cylindrical sleeve, and the L-shaped crank arm drives the cylindrical sleeve to move vertically.

7. The high-low voltage linkage switching protection switch according to claim 5 is characterized in that: An upper seat plate and a lower seat plate for fixing the bistable electromagnet are provided in the box body, the bistable electromagnet is fixed between the upper seat plate and the lower seat plate, and the low-voltage switch is arranged below the lower seat plate; The low-voltage transmission rod passes through the lower seat plate and the bottom end is fixedly connected to the moving block of the low-voltage switch.

8. The high-low voltage linkage switching protection switch according to claim 1 is characterized in that: The L-shaped turning arm is hinged in the box body through a supporting shaft penetrating the corner.

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