Opening and closing limiting device of isolating switch
By designing a switch-closing limit device with five anti-locks, the personal safety hazards caused by the lack of locking function in the prior art are solved, and the forced locking and operation of the isolating switch are achieved.
Patent Information
- Application Number
- CN202422081399.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing open and closing limit device lacks locking function, which causes anyone to operate the isolation switch, which poses a huge personal safety hazard.
A closing limit device including a pin shaft, a pin shaft housing, a pin shaft tie rod, an elastic member and a five-proof lock are designed to achieve forced locking of the isolating switch through the existence of the five-proof lock.
It effectively prevents non-specific personnel from operating the isolation switch, ensures the personal safety of maintenance personnel, simplifies the operation process, and improves safety and reliability.
Smart Images
Figure CN222966001U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of switches, and particularly to a closing and opening limiting device for a disconnector. Background Art
[0002] To ensure the personal safety of maintenance personnel and electrical safety, it is necessary to strictly manage the operation of the earthing switch of the high-voltage switchgear and set reasonable, reliable, and simple anti-misoperation measures. Therefore, how to forcibly lock the disconnector under the energized state of the equipment to prevent closing misoperation has become a problem that needs to be solved in this industry.
[0003] The disconnector realizes opening and closing through a closing and opening limiting device. However, the existing closing and opening limiting device has no locking function, resulting in anyone being able to operate the closing and opening limiting device to realize the opening and closing of the disconnector, which will bring great potential safety hazards to the personal safety of maintenance personnel. Therefore, it is necessary to provide a closing and opening limiting device with a locking function to forcibly lock the disconnector and ensure the personal safety of maintenance personnel. Utility Model Content
[0004] The embodiment of this application provides a closing and opening limiting device for a disconnector. The closing and opening limiting device has a locking function and can forcibly lock the disconnector, thereby ensuring the personal safety of maintenance personnel.
[0005] The embodiment of this application provides a closing and opening limiting device for a disconnector, including a pin shaft, a pin shaft housing, a pin shaft pull rod, an elastic member, and a five-prevention lock;
[0006] The first end of the pin shaft pull rod and the first end of the pin shaft are both arranged in the pin shaft housing, and the first end of the pin shaft pull rod is connected to the first end of the pin shaft. Among them, the pin shaft pull rod can drive the pin shaft to move in the pin shaft housing;
[0007] The elastic member is arranged inside the pin shaft housing, one end is connected to the pin shaft housing, and the other end is in contact with the first end of the pin shaft. Among them, the first end of the pin shaft pull rod passes through the elastic member and is connected to the first end of the pin shaft;
[0008] The five-prevention lock is used to be arranged on the pin shaft housing to lock the closing and opening limiting device when the second end of the pin shaft extends into the limiting hole of the closing and opening limiting device.
[0009] In the closing and opening limiting device for a disconnector described in the embodiment of this application, the elastic member is a compression spring.
[0010] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, a clamping device is further included. The pin rod can rotate a first angle relative to the pin housing and the pin. The clamping device is used to clamp the pin rod when the pin rod rotates the first angle relative to the pin housing and the pin.
[0011] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, the first angle is 90°.
[0012] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, a clamping member is further included. A clamping hole is provided on the pin housing. The pin rod can rotate a second angle relative to the pin housing and the pin. The clamping member is used to insert into the clamping hole to clamp the pin rod when the pin rod rotates the second angle relative to the pin housing and the pin.
[0013] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, the clamping member is a clamping screw.
[0014] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, the second angle is 90°.
[0015] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, the pin housing is made of metal.
[0016] In the opening and closing limiting device of the disconnector according to the embodiment of the present application, the pin rod is made of metal.
[0017] The opening and closing limiting device of the disconnector provided by the embodiment of the present application includes a pin, a pin housing, a pin rod, an elastic member and a five-prevention lock. The existence of the five-prevention lock enables the opening and closing limiting device to have a locking function, so as to be able to forcibly lock the disconnector, preventing non-specific personnel from operating the disconnector, and thus ensuring the personal safety of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0019] Figure 1 It is a schematic structural diagram of the opening and closing limiting device when the elastic member provided by the embodiment of the present application is in the original state.
[0020] Figure 2This is a schematic structural diagram of the opening and closing limit device when the elastic member provided in the embodiment of the present application is in a compressed state.
[0021] Explanation of the reference numerals in the drawings:
[0022] 10 - pin shaft, 20 - pin shaft housing, 30 - pin shaft pull rod
[0023] 40 - elastic member, 50 - clamping member Specific implementation manners
[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.
[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.
[0026] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0027] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.
[0028] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure of this application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.
[0029] An embodiment of this application provides a closing and opening limiting device for a disconnecting switch. Referring to Figure 1 and Figure 2 , the closing and opening limiting device for the disconnecting switch includes a pin shaft 10, a pin shaft housing 20, a pin shaft pull rod 30, an elastic member 40 and a five-prevention lock.
[0030] Among them, the five-prevention lock is a lock for high-voltage switchgear. This lock forces operating personnel to operate electrical equipment correctly in accordance with established safety operating procedures, thus avoiding the occurrence of misoperation accidents and fully meeting the "five-prevention" requirements. Among them, the "five-prevention" includes: ① preventing misoperation of closing and opening the switch; ② preventing closing and opening the isolating switch with load; ③ preventing entering the live working space by mistake; ④ preventing hanging the grounding wire when the equipment is live; ⑤ preventing closing the switch with the grounding wire (grounding switch) connected.
[0031] The first end of the pin shaft pull rod 30 and the first end of the pin shaft 10 are both arranged in the pin shaft housing 20, and the first end of the pin shaft pull rod 30 is connected to the first end of the pin shaft 10. Among them, the pin shaft pull rod 30 can drive the pin shaft 10 to move in the pin shaft housing 20.
[0032] Among them, when the pin shaft pull rod 30 is pulled, the pin shaft pull rod 30 drives the pin shaft 10 to move, and the second end of the pin shaft 10 retracts into the pin shaft housing 20. At this time, the second end of the pin shaft 10 disengages from the limiting hole of the closing and opening limiting device.
[0033] The elastic member 40 is disposed inside the pin housing 20 , one end of which is connected to the pin housing 20 , and the other end of which contacts the first end of the pin 10 , wherein the first end of the pin pull rod 30 passes through the elastic member 40 and is connected to the first end of the pin 10 .
[0034] Among them, when the pin shaft pull rod 30 is pulled, the pin shaft pull rod 30 drives the pin shaft 10 to move in the pin shaft housing 20, and the second end of the pin shaft 10 is retracted into the pin shaft housing 20. At this time, the elastic member 40 is compressed by the pin shaft 10; when the pin shaft pull rod 30 is released, the elastic member 40 returns to its original state. At this time, the second end of the pin shaft 10 extends into the limiting hole of the opening and closing limit device under the action of the elastic member 40. At this time, the five-protection lock is hung on the pin shaft housing 20 to lock the opening and closing limit device, so that the isolating switch can be forcibly locked, so that non-specific personnel cannot operate the isolating switch (after hanging the five-protection lock, it must be unlocked to operate the isolating switch), thereby ensuring the personal safety of the maintenance personnel.
[0035] Among them, when the operator is opening and closing the disconnector, he must hold the locking key, release the five-protection lock on the opening and closing limit device, and then operate the opening and closing limit device to make the disconnector perform normal opening and closing operations. After the operation is completed, continue to hang the five-protection lock on the opening and closing limit device to achieve locking to prevent improper operation and ensure the personal safety of the operator.
[0036] The shaft pin 10 extends into the limiting hole of the opening and closing limiting device to realize the opening and closing positioning of the isolating switch.
[0037] The five-protection lock is used to be arranged on the pin shaft housing 20 to lock the opening and closing limit device when the second end of the pin shaft 10 extends into the limit hole of the opening and closing limit device.
[0038] The opening and closing limit device of the isolating switch provided in the embodiment of the present application has a locking function due to the presence of five protection locks, so that the isolating switch can be forcibly locked, preventing non-specific personnel from operating the isolating switch, thereby ensuring the personal safety of maintenance personnel.
[0039] In some embodiments, the elastic member 40 is a compression spring.
[0040] In some embodiments, the opening and closing limit device of the disconnecting switch also includes a locking device, and the pin pull rod 30 can be rotated by a first angle relative to the pin shaft housing 20 and the pin shaft 10. The locking device is used to lock the pin pull rod 30 when the pin pull rod 30 is rotated by a first angle relative to the pin shaft housing 20 and the pin shaft 10.
[0041] In some embodiments, the first angle is 90°.
[0042] In some embodiments, the opening and closing limiting device of the disconnecting switch further includes a clamping member 50. A clamping hole is provided on the pin shaft housing 20. The pin shaft pull rod 30 can rotate relative to the pin shaft housing 20 and the pin shaft 10 by a second angle. The clamping member 50 is used to insert into the clamping hole when the pin shaft pull rod 30 rotates relative to the pin shaft housing 20 and the pin shaft 10 by the second angle, so as to clamp the pin shaft pull rod 30.
[0043] In some embodiments, the clamping member 50 is a clamping screw.
[0044] In some embodiments, the second angle is 90°.
[0045] Among them, by pulling the pin shaft pull rod 30 to drive the pin shaft 10 to disengage from the limiting hole of the opening and closing limiting device, during the operation process, the pin shaft pull rod 30 can be rotated by 90°. The clamping screw is used to clamp on the pin shaft housing 20, reducing the friction during operation and making the operation more flexible and convenient. After the operation is completed, the pin shaft pull rod 30 is rotated by 90°, so that the pin shaft 10 automatically slides into the limiting hole of the opening and closing limiting device under the action of the compression spring (elastic member 40). At this time, the five-prevention lock is hung, and the disconnecting switch is forcibly locked during the live operation state of the equipment, thus effectively preventing the problem of misclosing operation and ensuring the personal safety of the operators.
[0046] In the embodiment of the present application, a locking device is added to the opening and closing limiting device. When the disconnecting switch is in the open or closed state, a five-prevention lock is added; a fixing bolt is added to the pin shaft pull rod to cooperate with the lock shell, realizing the flexible rotation of the operating mechanism, reducing the operating force, avoiding the friction between the pin shaft pull rod and the handle during rotation, being more flexible in operation than the original limiting pin shaft, and being safe and reliable.
[0047] In some embodiments, the pin shaft housing 20 is made of metal.
[0048] In some embodiments, the pin shaft pull rod 30 is made of metal.
[0049] Among them, the uses of the opening and closing limiting device of the disconnecting switch are specifically reflected in the following aspects:
[0050] ① Mis-opening and mis-closing
[0051] That is: prevent mis-opening and mis-closing of the circuit breaker. Only when the operation instruction corresponds to the operating equipment can the operating equipment be operated.
[0052] ② Load opening and closing
[0053] That is: prevent opening and closing of the disconnecting switch with load. The disconnecting switch cannot be operated when the circuit breaker, load switch, and contactor are in the closing state.
[0054] ③ Live earthing
[0055] That is, to prevent hanging (closing) the grounding wire (earthing switch) while energized. Only when the circuit breaker is in the open state can the grounding wire be hung or the earthing switch be closed.
[0056] ④ Energizing with the grounding wire connected
[0057] That is, to prevent energizing with the grounding wire connected and prevent closing the circuit breaker (disconnector) with the grounding wire (earthing switch) connected.
[0058] ⑤ Entering the energized area by mistake
[0059] That is, to prevent entering the energized compartment by mistake. Only when the compartment is de-energized can the door be opened to enter the compartment.
[0060] Among them, the on-off limiting device of the prior art has the following defects: when the equipment is in the energized state, the equipment cannot achieve a self-locking state, and the operator can perform on-off operations on the disconnector at any time. The problem of closing misoperation cannot be effectively controlled, and the personal safety of the operator cannot be guaranteed. The on-off limiting device of the present application can forcibly lock the disconnector when the equipment is in the energized operation state, thus effectively preventing the problem of closing misoperation, guaranteeing the personal safety of the operator, and the device has the advantages of simple use, safety and reliability.
[0061] As can be seen from the above, the present application provides a new type of locking limiting device with reliable self-locking and long-term stability for indoor use, replacing the pin-type non-locking device used in the current disconnector operating mechanism, effectively improving the reliability of the disconnector self-locking, and preventing the disconnector from malfunctioning during operation due to misoperation or failure of the limiting function, thus causing large-scale power outages and threatening the personal safety of maintenance personnel. The device has the advantages of simple use, safety and reliability. When misoperation occurs, it can achieve automatic locking, prevent the misoperation from proceeding, and as much as possible without increasing the complexity of normal operation and accident handling, effectively reducing the probability of disconnector misoperation.
[0062] In summary, the on-off limiting device of the disconnector provided by the embodiment of the present application includes a pin shaft 10, a pin shaft housing 20, a pin shaft pull rod 30, an elastic member 40 and a five-prevention lock. The presence of the five-prevention lock makes the on-off limiting device have a locking function, so as to be able to forcibly lock the disconnector, preventing non-specific personnel from operating the disconnector, and thus ensuring the personal safety of maintenance personnel.
[0063] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.
[0064] The above has introduced in detail a closing and opening limit device for a disconnector provided by an embodiment of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A closing and opening limit device for an isolating switch, characterized in that: It includes a pin shaft, a pin shaft housing, a pin shaft pull rod, an elastic member and a five-protection lock; The first end of the pin pull rod and the first end of the pin shaft are both disposed in the pin shaft housing, and the first end of the pin pull rod is connected to the first end of the pin shaft, wherein the pin pull rod can drive the pin shaft to move in the pin shaft housing; The elastic member is arranged inside the pin housing, one end of which is connected to the pin housing, and the other end of which is in contact with the first end of the pin, wherein the first end of the pin pull rod passes through the elastic member and is connected to the first end of the pin; The five-protection lock is used to be arranged on the pin shaft housing to lock the opening and closing limit device when the second end of the pin shaft extends into the limit hole of the opening and closing limit device.
2. The closing and opening limit device of the isolating switch according to claim 1, characterized in that: The elastic member is a compression spring.
3. The disconnector closing and opening limit device according to claim 1, characterized in that: It also includes a locking device, and the pin pull rod can rotate relative to the pin shaft housing and the pin shaft by a first angle. The locking device is used to lock the pin pull rod when the pin pull rod rotates relative to the pin shaft housing and the pin shaft by the first angle.
4. The disconnector closing and opening limit device according to claim 3, characterized in that: The first angle is 90°.
5. The opening and closing limit device of the disconnector according to claim 1, characterized in that: It also includes a locking piece, a locking hole is provided on the pin shaft housing, and the pin shaft pull rod can rotate to a second angle relative to the pin shaft housing and the pin shaft. The locking piece is used to insert into the locking hole to lock the pin shaft pull rod when the pin shaft pull rod rotates to the second angle relative to the pin shaft housing and the pin shaft.
6. The disconnector closing and opening limit device according to claim 5, characterized in that: The locking piece is a locking screw.
7. The disconnector closing and opening limit device according to claim 5, characterized in that: The second angle is 90°.
8. The disconnector closing and opening limit device according to claim 1, characterized in that: The pin shaft housing is made of metal.
9. The opening and closing limit device of the disconnector according to claim 1, characterized in that: The pin pull rod is made of metal.