Anti-misoperation isolating and closing locking device and method

Abstract

This application discloses a locking device and method for preventing misoperation of an isolating switch. The device includes a locking device body, an elastic wedge, and a locking device housing. When the isolating switch is in the off state, the locking device housing and the locking device body are first connected by threads, and then the locking device body is fitted onto the outside of the stationary contact of the isolating switch. The locking device housing is rotated, causing it to move axially along the locking device body. The limiting surface inside the locking device housing moves synchronously with the locking device housing until the limiting surface contacts the elastic wedge at one end of the locking device body. Continuous rotation of the locking device housing causes the limiting surface to exert a squeezing effect on the elastic wedge, causing the elastic wedge to contract towards the center of the locking device body. After contraction, the elastic wedge tightly clamps the stationary contact of the isolating switch, preventing the isolating switch blade from contacting the stationary contact, thus completing the mechanical locking of the isolating switch.

Description

Technical Field

[0001] This application relates to the field of power distribution line operation tools, and in particular to an isolation switch locking device and method to prevent misoperation. Background Technology

[0002] Pole-mounted disconnect switches are key equipment in power distribution networks to ensure line maintenance and personal safety. Opening the pole-mounted disconnect switch can isolate the equipment that needs maintenance from other operating lines and establish a reliable insulation gap to ensure the safety of maintenance or testing work.

[0003] During the construction and maintenance of power distribution networks, due to the limited number of circuit breakers installed, some work sites only use disconnecting switches to disconnect unloaded lines and transformers. If, during power outage construction, someone accidentally closes the disconnecting switch, it can cause a grounding fault by forming a circuit with the grounding wire, or even lead to personal injury accidents. Power line safety regulations require that warning signs be hung and barriers (fences) be installed after power outages, voltage testing, and grounding wire installation. However, these only serve as warnings against accidental closure of disconnecting switches and lack technical means to prevent unauthorized closure. Therefore, there is an urgent need for a reliable and easy-to-operate interlocking device to forcibly lock the disconnecting switch in the open state. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] Therefore, a first aspect of the present invention provides an isolation opening and closing locking device to prevent accidental operation.

[0007] A second aspect of the present invention provides an isolation opening and closing locking method.

[0008] In view of this, a first aspect of the embodiments of this application provides an isolation opening and closing locking device to prevent misoperation, comprising: The locking device body has an external thread formed on it; An elastic wedge is formed at one end of the locking device body; A locking device housing is threadedly connected to the locking device body. A limiting surface is formed inside the locking device housing. When the limiting surface contacts the elastic wedge, the elastic wedge retracts towards the center of the locking device body.

[0009] In one feasible embodiment, the elastic wedge includes: a plurality of elastic plates arranged at the end of the locking device body, the elastic plates being inclined relative to the axial direction of the locking device body, the plurality of elastic plates being spaced apart, and the elastic plates moving in the radial direction of the locking device body when the limiting surface contacts the elastic wedge.

[0010] In one feasible implementation, an internal thread is formed inside the locking device housing, and the locking device housing is connected to the locking device body through the internal thread. The limiting surface is conical, and compared with the internal thread, the limiting surface is disposed away from the locking device body.

[0011] In one feasible implementation, the isolation and opening / closing locking device further includes: A limiting component is disposed within the locking device body and is used to limit the stationary contact of the disconnecting switch to be locked.

[0012] In one feasible implementation, the limiting component includes: A positioning plate, which is connected to the locking device body; A limiting plate is connected to the positioning plate, and a limiting groove is formed on the limiting plate to accommodate the stationary contact.

[0013] In one feasible implementation, the anti-misoperation isolation switch interlocking device further includes: An insulating rod assembly is provided for connection to the locking device housing to drive the locking device housing to rotate relative to the locking device body.

[0014] In one feasible implementation, the insulating rod assembly includes: The rod head includes a connecting section and a plug-in section. The locking device housing has a plug hole formed at one end opposite to the locking device body. The plug-in section is used to be inserted into the plug hole. A rod body, which is connected to the rod head; Wherein, the cross-section of the socket along the width direction is polygonal, and the shape of the plug segment is adapted to the shape of the socket.

[0015] In one feasible implementation, the insulating rod assembly further includes: A limiting hole is provided, which is provided along the width direction of the insertion segment; The positioning bead and the elastic element are provided, with one end of the elastic element connected to the inner wall of the limiting hole and the other end connected to the positioning bead. The locking device housing has a groove formed on its inner wall, and the positioning bead is used to be placed in the groove so that the insertion section engages with the locking device housing.

[0016] According to a second aspect of the embodiments of this application, an isolation lockout method is provided, applied to the isolation lockout device as described in any of the above technical solutions, the isolation lockout method comprising: When the disconnecting switch is in the off state, the locking device housing is connected to the locking device body by threads; The locking device body is fitted onto the stationary contact of the disconnect switch in the open state; Tightening the locking device housing causes the elastic wedge to retract, tightly clamping the stationary contact and preventing the disconnector switch blade from contacting the stationary contact, thus achieving mechanical locking of the disconnector switch. In one feasible embodiment, the step of tightening the locking device housing to retract the elastic wedge and mechanically locking the disconnector switch includes: The insertion section of the insulating rod assembly is inserted into the housing of the locking device, and the locking device body is rotated by rotating the insulating rod assembly.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: The anti-misoperation locking device for an isolating switch provided in this application includes a locking device body, an elastic wedge, and a locking device housing. When the isolating switch is in the open state, the locking device housing and the locking device body are first connected by threads, and then the locking device body is fitted onto the outside of the stationary contact of the isolating switch. The locking device housing is rotated, causing it to move axially along the locking device body. The limiting surface inside the locking device housing moves synchronously with the locking device housing until it contacts the elastic wedge at one end of the locking device body. Continuous rotation of the locking device housing causes the limiting surface to exert a squeezing effect on the elastic wedge, causing the elastic wedge to contract towards the center of the locking device body. After contraction, the elastic wedge tightly clamps the stationary contact of the isolating switch, preventing the isolating switch blade from contacting the stationary contact, thus achieving mechanical locking of the isolating switch. It can be understood that when releasing the lock, the locking device housing is rotated in the opposite direction, causing it to move axially in the opposite direction along the locking device body. The limiting surface inside the locking device housing gradually disengages from contact with the elastic wedge. The pressure exerted on the elastic wedge by the limiting surface is then eliminated, and the elastic wedge returns to its original position on the outside of the locking device body due to its own elasticity, releasing the tight clamping state on the stationary contact. The locking device body can then be removed from the stationary contact of the disconnector switch, thus completing the mechanical locking release of the disconnector switch blade, allowing the switch to close normally.

[0018] The anti-misoperation isolation switch interlocking device provided in this application embodiment achieves forced mechanical interlocking of the stationary contact through a threaded connection between the interlocking device body and the interlocking device housing, and by means of compression and contraction of the elastic wedge by the limiting surface. This physically prevents the switch from being accidentally closed, reliably mitigating the risk of misoperation during power outage maintenance. The clamping method, where the elastic wedge contracts towards the center of the interlocking device body, ensures uniform clamping force and a stable interlocking state, preventing interlocking failure. The threaded connection is simple to operate, has a concise and robust structure, and can stably achieve the anti-misoperation interlocking function over a long period, effectively ensuring the safety of personnel and equipment during power distribution line maintenance.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic structural diagram illustrating the usage state of an isolation opening and closing locking device for preventing misoperation, provided in one embodiment of this application; Figure 2 A schematic structural diagram of the locking device body of an isolation opening and closing locking device for preventing misoperation according to an embodiment of this application, taken from a first angle; Figure 3 A schematic structural diagram of the locking device housing of an isolation opening and closing locking device for preventing misoperation according to an embodiment of this application, taken from a first angle; Figure 4 A schematic structural diagram of the locking device body of an isolation opening and closing locking device for preventing misoperation according to an embodiment of this application, taken from a second angle; Figure 5 A schematic structural diagram of the locking device body of an isolation opening and closing locking device for preventing misoperation according to an embodiment of this application, taken from a third angle; Figure 6 A schematic structural diagram of the locking device housing of an isolation opening and closing device for preventing misoperation according to an embodiment of this application, taken from a second angle; Figure 7 A schematic structural diagram of the locking device housing of an isolation opening and closing locking device for preventing misoperation according to an embodiment of this application, taken from a third angle; Figure 8 A schematic structural diagram of the disassembled state of an isolation opening and closing interlocking device for preventing misoperation according to an embodiment of this application; Figure 9 A schematic structural diagram of the lever head of an isolation opening and closing locking device for preventing misoperation, provided in one embodiment of this application; Figure 10 A schematic cross-sectional view of a portion of the rod head of an isolation opening and closing locking device for preventing misoperation, provided in this application; Figure 11 This is a schematic flowchart illustrating the steps of an isolation opening and closing locking method according to an embodiment of this application.

[0021] in, Figures 1 to 10 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Disconnecting switch, 11. Channel steel, 12. Post insulator, 13. Inlet / outlet plate, 14. Knife switch, 15. Stationary contact, 2. Disconnecting switch locking device, 21. Locking device body, 22. Locking device housing, 211. External thread, 212. Positioning plate, 213. Limiting plate, 214. Elastic wedge, 221. Internal thread, 222. Limiting surface, 3. Insulating rod assembly, 31. Rod head, 32. Rod body, 311. Plug-in section, 312. Connecting section, 313. Limiting hole, 314. Positioning bead. Detailed Implementation

[0022] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0024] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0025] like Figures 1 to 10 As shown, according to a first aspect of the present application, an isolation opening and closing locking device 2 for preventing misoperation is provided, comprising: a locking device body 21, on which an external thread 211 is formed; an elastic wedge 214, which is formed at one end of the locking device body 21; and a locking device housing 22, which is threadedly connected to the locking device body 21, and a limiting surface 222 is formed inside the locking device housing 22. When the limiting surface 222 contacts the elastic wedge 214, the elastic wedge 214 retracts toward the center of the locking device body 21.

[0026] The anti-misoperation locking device 2 for the disconnector provided in this embodiment includes a locking device body 21, an elastic wedge 214, and a locking device housing 22. When the disconnector is in the open state, the locking device housing 22 is first connected to the locking device body 21 by threads, and then the locking device body 21 is fitted onto the outside of the stationary contact 15 of the disconnector. The locking device housing 22 is rotated, causing it to move along the axial direction of the locking device body 21. The limiting surface 222 inside the locking device housing 22 moves synchronously with the locking device housing 22 until the limiting surface 222 contacts the elastic wedge 214 at one end of the locking device body 21. The continuous rotation of the locking device housing 22 causes the limiting surface 222 to exert a squeezing effect on the elastic wedge 214, causing the elastic wedge 214 to contract towards the center of the locking device body 21. After contraction, the elastic wedge 214 tightly clamps the stationary contact 15, preventing the disconnector switch 14 from contacting the stationary contact 15, thus achieving mechanical locking of the disconnector switch. It can be understood that when releasing the lock, the locking device housing 22 is rotated in the opposite direction, causing the housing 22 to move axially in the opposite direction along the locking device body 21. The limiting surface 222 within the locking device housing 22 gradually disengages from the contact state with the elastic wedge 214. The squeezing force of the limiting surface 222 on the elastic wedge 214 is then eliminated, and the elastic wedge 214 returns to its original position outside the locking device body 21 due to its own elasticity, releasing the tight clamping state on the stationary contact 15. Subsequently, the locking device body 21 is removed from the stationary contact 15 of the disconnector switch, thus completing the release of the mechanical lock of the disconnector switch 14, allowing the switch 14 to close normally.

[0027] The anti-misoperation isolation switch interlocking device 2 provided in this application embodiment achieves forced mechanical interlocking of the stationary contact 15 through the threaded connection between the interlocking device body 21 and the interlocking device housing 22, and the compression of the elastic wedge 214 by the limiting surface 222. This physically prevents the switch 14 from being accidentally closed, reliably preventing the risk of misoperation during power outage maintenance. The clamping method of the elastic wedge 214 retracting towards the center of the interlocking device body 21 provides uniform clamping force and stable interlocking state, avoiding interlocking failure. The threaded connection is simple to operate, has a simple and stable structure, and can stably achieve the anti-misoperation interlocking function for a long time, effectively ensuring the safety of personnel and equipment during power distribution line maintenance.

[0028] like Figures 2 to 5 As shown, in one feasible embodiment, the elastic wedge 214 includes: a plurality of elastic plates arranged at the end of the locking device body 21, the elastic plates being inclined relative to the axial direction of the locking device body 21, the plurality of elastic plates being arranged at intervals, and the elastic plates moving in the radial direction of the locking device body 21 when the limiting surface 222 is in contact with the elastic wedge 214.

[0029] In this technical solution, the elastic wedge 214 employs a structure of multiple elastic plates spaced apart along the end of the locking device body 21. These elastic plates are axially inclined relative to the locking device body 21, allowing for stable radial movement of the elastic plates along the locking device body 21 when the limiting surface 222 contacts the elastic wedge 214. The multi-plate spaced arrangement ensures uniform radial contraction force, resulting in a tighter fit when clamping the stationary contact 15, ensuring a secure and non-loose locking mechanism. The inclined elastic plates, combined with the compression from the limiting surface 222, ensure smooth transmission, precise contraction, and prevent jamming. This structure improves locking reliability and operational stability, enabling long-term reliable anti-misoperation locking and effectively protecting the safety of the disconnector switch in its open state.

[0030] like Figures 6 to 7 As shown, in one feasible embodiment, an internal thread 221 is formed in the housing 22 of the locking device, and the housing 22 of the locking device is connected to the body 21 of the locking device through the internal thread 221. The limiting surface 222 is conical and is located away from the body 21 of the locking device compared to the internal thread 221.

[0031] In this technical solution, the locking device housing 22 is threadedly connected to the locking device body 21 via an internal thread 221, ensuring reliable fit and stable transmission. This allows for precise transmission of the tightening force and axial displacement. The limiting surface 222 has a tapered structure and is positioned further away from the locking device body 21 than the internal thread 221. This allows it to contact and compress the elastic wedge 214 in an orderly and stable manner during the screwing process of the locking device housing 22, smoothly converting the axial tightening force into a radial clamping force, resulting in uniform and smooth force transmission. This layout and structural design avoids squeezing impacts and jamming, improves the stability of the clamping action and the reliability of the locking mechanism, and ensures the stable implementation of the anti-misoperation locking function.

[0032] like Figures 2 to 5 As shown, in one feasible embodiment, the isolating switch locking device 2 further includes a limiting component, which is disposed within the locking device body 21 and is used to limit the stationary contact 15 of the switch to be locked.

[0033] In this technical solution, the isolating switch locking device 2 also includes a limiting component. This limiting component can pre-position and limit the stationary contact 15 of the isolating switch before the locking operation, ensuring that the stationary contact 15 is always in the set open locking position, preventing the stationary contact 15 from shifting or shaking and affecting the locking assembly and clamping effect. Simultaneously, during the locking operation and after the mechanical locking is completed, the limiting component can continuously constrain the stationary contact 15 of the isolating switch, keeping the switch 14 in a stable open position and preventing the switch 14 from shifting, swinging, or accidentally displacing. The limiting component can improve the matching accuracy between the locking device and the stationary contact 15, ensuring that the elastic wedge 214 is evenly stressed and reliably clamped, further enhancing the stability and accuracy of the mechanical locking, and effectively improving the overall reliability of the anti-misoperation locking.

[0034] like Figures 2 to 5 As shown, in one feasible implementation, the limiting component includes: a positioning plate 212 connected to the locking device body 21; and a limiting plate 213 connected to the positioning plate 212, with a limiting groove formed on the limiting plate 213 for accommodating the stationary contact 15.

[0035] In this technical solution, the limiting component includes a positioning plate 212 and a limiting plate 213 connected to the positioning plate 212. The limiting plate 213 is provided with a limiting groove for accommodating the stationary contact. The positioning plate 212 can achieve a stable connection between the limiting component and the locking device body 21, ensuring the overall structural strength and installation accuracy. The limiting groove on the limiting plate 213 can directly accommodate the stationary contact 15, accurately positioning the stationary contact 15 before locking, and continuously constraining the stationary contact 15 circumferentially after locking, preventing the stationary contact 15 from rotating, shifting, or moving. The limiting groove and the elastic wedge 214 clamp together to form a double locking protection, greatly improving the stability of the switch 14 in the open state and ensuring the reliability and long-term effectiveness of the anti-misoperation locking function.

[0036] like Figures 8 to 10 As shown, in one feasible embodiment, the isolation switch locking device 2 for preventing misoperation further includes an insulating rod assembly 3, which is connected to the locking device housing 22 to drive the locking device housing 22 to rotate relative to the locking device body 21.

[0037] In this technical solution, the insulating rod assembly 3 can be reliably connected to the locking device housing 22, enabling the locking device housing 22 to rotate relative to the locking device body 21. This allows for remote ground control of the locking and unlocking process, eliminating the need for personnel to climb the pole and significantly improving operational safety. The cooperation between the insulating rod assembly 3 and the locking device housing 22 stably transmits the tightening torque, ensuring smooth rotation of the locking device housing 22 and reliable tightening and loosening actions. This greatly improves the convenience and efficiency of the isolation opening and closing operation, meeting the requirements of power field safety operation specifications.

[0038] like Figures 8 to 10 As shown, in one feasible embodiment, the insulating rod assembly 3 includes: a rod head 31, which includes a connecting section 312 and a plug-in section 311; a locking device housing 22 has a socket formed at one end opposite to the locking device body 21; the plug-in section 311 is used to be plugged into the socket; and a rod body 32 connected to the rod head 31; wherein the cross-section of the socket along the width direction is polygonal, and the shape of the plug-in section 311 is adapted to the shape of the socket.

[0039] In this technical solution, the rod head 31 of the insulating rod assembly 3 includes a connecting section 312 and a plug-in section 311. The plug-in section 311 is adapted to the socket on the locking device housing 22, enabling stable plug-in assembly. Both the socket and the plug-in section 311 adopt a polygonal cross-sectional shape, which can form a reliable circumferential limit after plugging and mating, effectively avoiding slippage and free rotation during the tightening operation, and ensuring that the tightening torque is stably and efficiently transmitted to the locking device housing 22. The rod body 32 is connected to the rod head 31, which can extend the operating distance and realize remote ground operation. This structure has a tight fit and reliable force transmission, which greatly improves the stability, accuracy and safety of locking and unlocking operations, ensuring the efficient conduct of power operations.

[0040] like Figures 8 to 10 As shown, in one feasible embodiment, the insulating rod assembly 3 further includes: a limiting hole 313, which is opened along the width direction of the insertion section 311; a positioning bead 314 and an elastic member, one end of which is connected to the inner wall of the limiting hole 313 and the other end of which is connected to the positioning bead 314; wherein, a groove is formed on the inner wall of the locking device housing 22, and the positioning bead 314 is used to be disposed in the groove so that the insertion section 311 is engaged with the locking device housing 22.

[0041] In this technical solution, the insertion section 311 of the insulating rod assembly 3 is equipped with a limiting hole 313, a positioning bead 314, and an elastic element. A corresponding slot is provided on the inner wall of the locking device housing 22. The positioning bead 314, under the action of the elastic element, can be engaged into the slot, thus forming a stable engagement between the insertion section 311 and the locking device housing 22. This structure effectively prevents axial detachment of the insulating rod assembly 3 from the locking device housing 22 during tightening operations, ensuring reliable connection during operation. The snap-fit ​​and polygonal cross-section insertion fit form a dual positioning system, ensuring stable transmission of circumferential torque and axial anti-detachment constraint. This significantly improves the robustness and operational safety of the connection between the insulating rod assembly 3 and the locking device housing 22, ensuring smooth locking and unlocking operations and enhancing the reliability of power operations.

[0042] like Figure 11 As shown, a second aspect of the embodiments of this application provides an isolation opening and closing locking method, applied to an isolation opening and closing locking device as described in any of the above technical solutions. The isolation opening and closing locking method includes: Step 201: With the disconnector switch in the open position, connect the locking device housing to the locking device body via threads; Step 202: Place the locking device body onto the stationary contact of the disconnector switch in the open position; Step 203: Tighten the housing of the locking device to retract the elastic wedge, tightly clamp the stationary contact, prevent the disconnector switch knife from contacting the stationary contact, and achieve mechanical locking of the disconnector switch.

[0043] The isolation opening and closing locking method provided in this application embodiment, since it is applied to the isolation opening and closing locking device of any of the above technical solutions, therefore the isolation opening and closing locking method has all the beneficial effects of the isolation opening and closing locking methods of the above technical solutions.

[0044] The isolating switch interlocking method provided in this application involves first threading the interlocking device housing and the interlocking device body together with the isolating switch in the off state, then fitting it onto the stationary contact, and finally screwing the interlocking device housing to retract the elastic wedge to achieve mechanical interlocking. The process is standardized and the operation is orderly. This method can quickly complete the forced interlocking of the isolating switch, preventing accidental closing from a physical structure perspective and ensuring maintenance safety. The steps are simple and clear, easy for on-site personnel to execute, the interlocking action is reliable, and it can stably achieve the anti-misoperation function, meeting the requirements of power operation safety regulations.

[0045] Understandably, when the isolation switch locking device for preventing misoperation includes an insulating rod assembly, the insulating rod assembly, the locking device housing, and the locking device body can be assembled into a whole before the isolation switch locking device is connected to the stationary contact.

[0046] In one feasible implementation, screwing the locking device housing to retract the elastic wedge and tightly clamp the stationary contact includes: inserting the plug section of the insulating rod assembly into the locking device housing, and rotating the insulating rod assembly to drive the locking device body to rotate.

[0047] In this technical solution, the insulating rod assembly plug-in section is connected to the locking device housing. The insulating rod assembly drives the locking device housing to rotate, achieving elastic wedge retraction and mechanical locking of the switch. This allows for remote operation from the ground, eliminating the need for pole climbing and significantly improving safety. This method provides stable torque transmission, precise and controllable locking action, simplifies on-site operation procedures, improves work efficiency, and reliably achieves the safety protection against accidental closing.

[0048] Example like Figures 1 to 10 As shown, the anti-misoperation disconnector interlocking device of the present invention is adapted to the interlocking of the disconnector switch 1 on the pole in the distribution network line in the open state. The whole includes the disconnector interlocking device 2 and the matching insulating rod assembly 3. The disconnector interlocking device 2 includes the interlocking device body 21 and the interlocking device housing 22. The insulating rod assembly 3 includes the rod head 31 and the rod body 32. The device can be remotely operated from the ground through the insulating rod assembly 3. The mechanical structure of thread engagement and elastic wedge 214 contraction forms a forced clamping interlock on the stationary contact 15 of the disconnector switch 1, which eliminates the risk of accidental closing from the structure. Moreover, the disconnector interlocking device 2 is made of insulating material to avoid forming a closed circuit after contact with the switch 14, thereby improving the safety of operation.

[0049] In some examples, the disconnecting switch may include a channel steel 11, a post insulator 12, an inlet / outlet plate 13, and a knife switch 14 connected in sequence.

[0050] The following is for reference. Figures 1-6 The structure and operation of embodiments of this application are described.

[0051] like Figure 2 , Figure 3 As shown, the locking device body 21 is an integrally molded structure made of insulating elastic material. Its outer wall is machined with external threads 211 for threaded engagement with the locking device housing 22. The locking device body 21 is provided with a positioning plate 212 and a limiting plate 213. The positioning plate 212 is used to fit and position the end of the stationary contact 15 of the isolating switch 1, ensuring the coaxiality of the isolating switch locking device 2 and the stationary contact 15. The limiting plate 213 is machined with an elastic wedge 214 on its outer side. The elastic wedge 214 is an open-type oblique protrusion structure with an elastic opening design, which has a controllable radial shrinkage deformation capability. Its slope angle is slightly smaller than that of the limiting surface 222 of the locking device housing 22. When subjected to conical extrusion force, it can shrink inward to clamp the stationary contact 15 without causing damage to the surface of the stationary contact 15 due to excessive extrusion.

[0052] like Figure 4 As shown, the locking device housing 22 is a stepped cylindrical structure made of insulating material. Its inner wall is machined with internal threads 221, which precisely engage with external threads 211. The inner side of the housing is machined with a limiting surface 222, which serves as a transition cone surface to guide the force transmission during the tightening process. This converts the axial tightening force of the locking device housing 22 into a radial compressive force on the elastic wedge 214, improving the uniformity of the clamping force and the structural stability. The other side of the housing is the insulating rod insertion end, with a square limiting hole at the end for precise engagement with the insertion section 311 of the rod head 31, achieving reliable transmission of circumferential positioning and operating torque.

[0053] The lever head 31 is an operating component that is matched with the locking device housing 22, such as... Figure 6 As shown, its front end is a plug-in section 311, the size of which is perfectly matched with the square limiting hole of the locking device housing 22 to ensure that there is no slippage during rotation; a positioning bead 314 is radially embedded in the middle section of the plug-in section 311. When the plug-in section 311 is inserted into the square limiting hole 313, the positioning bead 314 pops out under the elastic force of the elastic element and forms an axial engagement with the end face of the locking device housing 22 to prevent the rod head 31 from falling off the housing during operation; the rear end of the rod head 31 is a connecting section 312, and a pin hole is provided on the connecting section 312 for pin-connection and fixation with the end of the rod body 32.

[0054] like Figure 1 , Figure 5The following describes the on-site operation method of the interlocking device. The specific operation steps are as follows: The operator holds the insulating rod assembly 3 on the ground and inserts the plug section 311 of the rod head 31 into the square limiting hole of the locking device housing 22 until the positioning bead 314 pops out and engages with the locking device housing 22, thus completing the connection between the insulating rod assembly 3 and the isolating switch locking device 2. Then, the isolating switch locking device 2 is lifted by the insulating rod assembly 3, and the positioning plate 212 of the locking device body 21 is attached to the end of the stationary contact 15 in the open state, so that the elastic wedge 214 is sleeved on the outside of the stationary contact 15, thus completing the mounting and positioning of the isolating switch locking device 2 and the isolating switch 1.

[0055] The operator rotates the rod 32 clockwise on the ground, which drives the locking device housing 22 to tighten around the locking device body 21 via the plug section 311. Under the screw engagement, the locking device housing 22 moves axially along the locking device body 21, and its inner limiting surface 222 gradually contacts the inclined surface of the elastic wedge 214 and generates compression. As the tightening operation proceeds, the axial tightening force is converted into a continuous radial compression force through the limiting surface 222, causing the elastic wedge 214 to contract inward along the inclined surface until the limiting plate 213 and the elastic wedge 214 together tightly clamp the stationary contact 15. At this time, the switch 14 is forcibly locked in the open position and cannot complete the closing action, thus realizing the mechanical locking of the disconnecting switch.

[0056] After the power distribution network maintenance is completed, the operator rotates the rod 32 counterclockwise on the ground, causing the locking device housing 22 to loosen around the locking device body 21. The locking device housing 22 gradually moves in the opposite axial direction, and the squeezing force of the limiting surface 222 on the elastic wedge 214 gradually disappears. The elastic wedge 214 returns to its radial position under its own elasticity, releasing the clamping restriction on the stationary contact 15. Then, the isolating switch locking device 2 is removed from the stationary contact 15 through the insulating rod assembly 3, the positioning bead 314 is pressed to retract it, and the plug section 311 is pulled out from the square limiting hole of the locking device housing 22, completing the entire unlocking and disassembly process, and the isolating switch returns to normal operation.

[0057] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An anti-misoperation isolating and closing lock device, characterized in that, include: The locking device body has an external thread formed on it; An elastic wedge is formed at one end of the locking device body; A locking device housing is threadedly connected to the locking device body. A limiting surface is formed inside the locking device housing. When the limiting surface contacts the elastic wedge, the elastic wedge retracts towards the center of the locking device body.

2. The anti-misoperation isolation opening and closing interlocking device according to claim 1, characterized in that, The elastic wedge includes: a plurality of elastic plates arranged at the end of the locking device body, the elastic plates being inclined relative to the axial direction of the locking device body, the plurality of elastic plates being spaced apart, and when the limiting surface contacts the elastic wedge, the elastic plates moving in the radial direction of the locking device body.

3. The anti-misoperation isolation opening and closing interlocking device according to claim 1, characterized in that, The locking device housing has an internal thread, and the locking device housing is connected to the locking device body through the internal thread. The limiting surface is conical, and compared with the internal thread, the limiting surface is located away from the locking device body.

4. The anti-misoperation isolation opening and closing interlocking device according to claim 1, characterized in that, Also includes: A limiting component is disposed within the locking device body and is used to limit the stationary contact of the disconnecting switch to be locked.

5. The anti-misoperation isolation opening and closing interlocking device according to claim 4, characterized in that, The limiting component includes: A positioning plate, which is connected to the locking device body; A limiting plate is connected to the positioning plate, and a limiting groove is formed on the limiting plate to accommodate the stationary contact.

6. The anti-misoperation isolation opening and closing interlocking device according to any one of claims 1 to 5, characterized in that, Also includes: An insulating rod assembly is provided for connection to the locking device housing to drive the locking device housing to rotate relative to the locking device body.

7. The anti-misoperation isolation opening and closing interlocking device according to claim 6, characterized in that, The insulating rod assembly includes: The rod head includes a connecting section and a plug-in section. The locking device housing has a plug hole formed at one end opposite to the locking device body. The plug-in section is used to be inserted into the plug hole. A rod body, which is connected to the rod head; Wherein, the cross-section of the socket along the width direction is polygonal, and the shape of the plug segment is adapted to the shape of the socket.

8. The anti-misoperation isolation opening and closing interlocking device according to claim 7, characterized in that, The insulating rod assembly also includes: A limiting hole is provided, which is provided along the width direction of the insertion segment; The positioning bead and the elastic element are provided, with one end of the elastic element connected to the inner wall of the limiting hole and the other end connected to the positioning bead. The locking device housing has a groove formed on its inner wall, and the positioning bead is used to be placed in the groove so that the insertion section engages with the locking device housing.

9. A method for isolating and locking, characterized in that, The isolation opening and closing locking device as described in any one of claims 1 to 8, wherein the isolation opening and closing locking method comprises: With the disconnect switch in the open state, the locking device housing is connected to the locking device body via a threaded connection; The locking device body is fitted onto the stationary contact of the disconnect switch in the open state; Tighten the housing of the locking device to retract the elastic wedge, which tightly clamps the stationary contact, preventing the disconnector switch knife from contacting the stationary contact, thereby achieving mechanical locking of the disconnector switch.

10. The isolation opening and closing locking method according to claim 9, characterized in that, The step of screwing the locking device housing to retract the elastic wedge and tightly clamp the stationary contact includes: The insertion section of the insulating rod assembly is inserted into the housing of the locking device, and the locking device body is rotated by rotating the insulating rod assembly.

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