An insulation protection device for power system commissioning
By installing a movable limiting component inside the pull hook of the insulated operating rod, the problem of easy lateral detachment of the cable of the existing insulated operating rod is solved, thereby improving the safety and operational stability of high-voltage operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI BOYANG ELECTRICITY ENG CONSTRUCT CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-17
AI Technical Summary
The existing design of the insulated operating rod's pull hook structure has problems such as easy lateral detachment of the cable, unstable operation, and inability to selectively close, resulting in insufficient safety and reliability of high-voltage operations.
An insulation protection device including a telescopic insulating rod, an anti-slip handle, and a switch hook is designed. The switch hook is equipped with a movable limiting component. The cable is restrained by the sliding cooperation between the hook body and the horizontal plate. The opening state is controlled by the lifting and lowering of the side baffle to prevent the cable from laterally detaching and accidentally hooking other cables.
It significantly improves the safety and stability of high-voltage operations, prevents cable damage, equipment malfunctions and communication interruptions, and enhances the accuracy and smoothness of operation.
Smart Images
Figure CN224519718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of insulating switch rod technology, specifically an insulating protection device for power system commissioning. Background Technology
[0002] During the commissioning, maintenance, and operation of power systems, insulated operating rods are widely used as key tools to ensure personnel safety in the indirect operation of high-voltage equipment, such as opening and closing circuit breakers, disconnecting switches, and attaching and removing grounding wires. However, existing insulated operating rods have certain design flaws in their end hook structures during actual use, leading to room for improvement in operational safety and reliability. Specifically, when using the hook to pull high-voltage cables to complete operations, the hooks typically employ an open hook structure and lack effective lateral restraint devices. During pulling or pushing, the cable is prone to detaching from the hook due to changes in angle or unstable force. This not only interrupts the operation and prolongs work time but also poses a risk of equipment collision or accidental contact due to unexpected swinging of the detached cable, threatening operational safety. Furthermore, existing hooks remain open throughout the entire operation, and the opening cannot be selectively closed or protected according to operational needs. This makes it easy to accidentally hook other unnecessary cables in complex high-voltage equipment environments, leading to accidental pulling of unrelated cables and potential secondary accidents such as cable damage, equipment malfunction, or communication interruption, further increasing the safety hazards and operational difficulty of high-voltage operations. Utility Model Content
[0003] In view of the shortcomings of the existing technology, this utility model provides an insulation protection device for power system commissioning, which aims to solve the above problems.
[0004] To achieve the above objectives, this utility model provides the following technical solution: an insulation protection device for power system commissioning, comprising a telescopic insulating rod and an anti-slip handle, wherein a pull hook is installed at the top of the telescopic insulating rod, and a movable limiting component is provided inside the pull hook, wherein the movable limiting component comprises a hook body, a horizontal plate and a side baffle, the horizontal plate is installed on one side of the hook body, the side baffle is installed on one end of the hook body, a movable inner cavity is provided inside the pull hook, and the hook body and the horizontal plate are slidably connected to the inner wall of the movable inner cavity, an opening is provided on one side of the pull hook, and the side baffle blocks the opening of the pull hook when it rises.
[0005] Preferably, each section of the telescopic insulating rod has a clearance groove on its side wall, and indicator lights are installed on the inner wall of several clearance grooves.
[0006] Preferably, a clearance groove is provided on the top side of the inner cavity of the movable cavity, and a return spring is installed on the inner wall of the clearance groove. The return spring is installed at the top of the hook body.
[0007] Preferably, a guide limiting rod is installed on the inner wall of the inner groove, a slot is opened at the top of the hook body, a reset spring is sleeved on the outside of the guide limiting rod, and the guide limiting rod is inserted into the inner wall of the slot.
[0008] Preferably, the top of the lever hook has a recessed opening, and the bottom of the lever hook has an arc surface.
[0009] Compared with the prior art, the present invention has the following advantages:
[0010] (1) This utility model forms an auxiliary limit by the movable limiting component and the through hole in the middle of the switch hook, which together constitutes a circumferential constraint on the cable. This structural design specifically solves the problem that the cable is easy to detach from the side of the switch hook.
[0011] (2) This utility model achieves controllable switching of the opening state by raising and lowering the side baffle (opening only when hanging cables), and keeps it closed during operation. It isolates the possibility of contact with other cables in the surrounding structure from the physical structure, thereby preventing secondary accidents such as cable damage, equipment malfunction or communication interruption caused by accidental pulling of unrelated cables, and significantly improving the safety, stability and operational accuracy of high-voltage operations. Attached Figure Description
[0012] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;
[0013] Figure 2 This is the utility model Figure 1 A magnified view of the structure at point A in the middle;
[0014] Figure 3 This is the utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle;
[0015] Figure 4 This is a cross-sectional exploded view of the pull hook and movable limiting component in this utility model.
[0016] In the diagram: 1. Telescopic insulating rod; 11. Anti-slip handle; 12. Clearance groove; 13. Indicator light; 2. Pull-off hook; 21. Movable inner cavity; 211. Clearance groove; 22. Return spring; 23. Guide limit rod; 24. Recessed top opening; 3. Movable limit component; 31. Hook body; 32. Horizontal plate; 33. Side baffle; 34. Slot. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1-4 An insulation protection device for power system commissioning includes a telescopic insulating rod 1 and an anti-slip handle 11. A pull hook 2 is installed at the top of the telescopic insulating rod 1, and a movable limiting component 3 is provided inside the pull hook 2. The movable limiting component 3 includes a hook body 31, a horizontal plate 32, and a side baffle 33. The horizontal plate 32 is installed on one side of the hook body 31, and the side baffle 33 is installed on one end of the hook body 31. A movable inner cavity 21 is opened inside the pull hook 2, and the hook body 31 and the horizontal plate 32 are slidably connected to the inner wall of the movable inner cavity 21.
[0019] The horizontal plate 32 is located in the through hole in the middle of the pull hook 2. An opening is provided on one side of the pull hook 2. When the side baffle 33 rises, it seals the opening of the pull hook 2. When the side baffle 33 falls, the opening on the side of the pull hook 2 opens.
[0020] The telescopic insulating rod 1 serves as the main support structure, adapting to different operating distance requirements through its telescopic characteristics. Simultaneously, the insulating material's properties ensure safe isolation between the operator and the high-voltage live conductor. The anti-slip handle 11 increases grip friction to ensure stable control during operation. The pull hook 2, acting directly on the high-voltage cable, has an internal movable limiting component 3 that adjusts its state through the sliding cooperation of the hook body 31 and the horizontal plate 32 within the movable inner cavity 21. When a cable needs to be attached, the side baffle 33 descends with the hook body 31, opening the side opening of the pull hook 2 to facilitate the smooth introduction of the target cable. When the attachment is completed and the pulling operation is performed, the cable pulls the horizontal plate 32 upwards, causing the hook body 31 to slide within the movable inner cavity 21, raising the side baffle 33 and precisely sealing it. The side opening of the switch hook 2 is blocked, and the horizontal plate 32 forms an auxiliary limit within the through hole in the middle of the switch hook 2, together constraining the cable. This structural design specifically solves the problem of cables easily detaching from the side of the switch hook. The blocking state of the side baffle 33 during operation, together with the limiting effect of the horizontal plate 32, forms an effective lateral barrier, avoiding operation interruption caused by cable detachment and the resulting risks such as equipment collision and accidental contact by personnel. The opening state can be controlled by raising and lowering the side baffle 33—opening only when the cable is attached and remaining closed during operation. This physically isolates the possibility of contact with other cables in the surrounding area, thereby preventing secondary accidents such as cable damage, equipment malfunction, or communication interruption caused by accidental pulling of unrelated cables. This significantly improves the safety, stability, and operational accuracy of high-voltage operations.
[0021] like Figures 1-4 As shown, each section of the telescopic insulating rod 1 has a clearance groove 12 on its side wall, and indicator lights 13 are installed on the inner wall of several clearance grooves 12. An NCV electric field sensing sensor, electrically connected to the corresponding indicator light 13, is installed inside each section of the telescopic insulating rod 1.
[0022] Each section of the telescopic insulating rod 1 has a recessed groove 12 on its side wall for installing an indicator light 13. Each section has an NCV electric field sensor that is electrically connected to the corresponding indicator light 13. When the NCV electric field sensor detects an electric field in the surrounding area, it transmits a signal to the corresponding indicator light 13, causing the indicator light 13 to light up. The indicator lights 13 in different sections can show different lighting states according to the difference in the electric field strength sensed at their location, thereby reflecting the electric field distribution and intensity of the surrounding charged bodies. It can sense the surrounding electric field in real time without contact. The lighting state of the indicator light 13 can intuitively indicate the surrounding charged conditions to the operator, allowing the operator to know the danger zone in advance and avoid accidental entry or misoperation, thus further improving the safety of high-voltage operations.
[0023] like Figures 1-4 As shown, a clearance groove 211 is provided on the top side of the movable inner cavity 21. A return spring 22 is installed on the inner wall of the clearance groove 211 and is installed at the top of the hook body 31. The return spring 22 pushes the movable limiting member 3 down to reset it.
[0024] Inside the movable inner cavity 21, the clearance groove 211 on the top side provides installation space for the reset spring 22. One end of the reset spring 22 is connected to the inner wall of the clearance groove 211, and the other end is connected to the top of the hook body 31. It continuously applies a downward pushing force to the hook body 31 using its own elasticity. When the movable limiting member 3 is subjected to external force, such as the force during cable hanging operation, and moves upward, the external force disappears. The elastic restoring force of the reset spring 22 will push the hook body 31, the horizontal plate 32, and the side baffle 33 downward as a whole, realizing the downward reset of the movable limiting member 3, allowing the opening of the switch hook 2 to be reopened or returned to the initial standby state, ensuring the smoothness of the next cable hanging operation and maintaining the continuity of the device operation process.
[0025] like Figures 1-4 As shown, a guide limit rod 23 is installed on the inner wall of the inner groove 211, and a slot 34 is opened at the top of the hook body 31. The reset spring 22 is sleeved on the outside of the guide limit rod 23, and the guide limit rod 23 is inserted into the inner wall of the slot 34.
[0026] In the clearance groove 211 of the movable inner cavity 21, the guide limit rod 23 plays a core guiding and limiting role. The reset spring 22 is sleeved on the outside of the guide limit rod 23. It not only provides the force for the hook body 31 to be pushed down and reset by the elasticity of the spring, but also restricts the deformation direction of the reset spring 22 by the structure of the guide limit rod 23, so as to prevent it from twisting or deviating when the elastic force is released. At the same time, the slot 34 at the top of the hook body 31 is inserted and cooperates with the guide limit rod 23, so that the hook body 31 can move stably along the axial direction of the guide limit rod 23 during the sliding of the movable limit component 3. This prevents the hook body 31 from being skewed or stuck in the movable inner cavity 21, and ensures that the reset and limiting functions of the movable limit component 3 are accurately and stably realized, thereby improving the reliability and smoothness of the overall operation of the pull hook 2.
[0027] like Figures 1-4 As shown, the top of the switch hook 2 has a recessed opening 24, and the bottom of the switch hook 2 has an arc surface. The recessed opening 24 on the top of the switch hook 2 can provide suitable contact space for the hook body and specific parts of the high-voltage equipment, such as the circuit breaker operating rod and wiring terminals, during operation, which facilitates precise positioning and force application, avoids slippage or misalignment during operation, and facilitates pushing.
[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0029] Working principle: The telescopic insulating rod 1 serves as the main support, adapting to different operating distances through its telescopic characteristics. Insulation material ensures safe isolation, and the anti-slip handle 11 guarantees stable grip. The pull hook 2 is the core operating component. The movable limiting member 3 within its movable inner cavity 21 adjusts its state through the sliding relationship between the hook body 31 and the horizontal plate 32: When attaching a cable, the side baffle 33 descends with the hook body 31, opening the opening for cable insertion; during pulling operations, the cable pulls the horizontal plate 32 upwards, causing the side baffle 33 to rise and block the opening, thus allowing the horizontal plate 32 to pass through the middle. The auxiliary limit of the hole forms a circumferential constraint to prevent the cable from detaching laterally and accidentally hooking other cables. In the clearance groove 211 on the top side of the movable inner cavity 21, the reset spring 22 connects the inner wall to the top of the hook body 31. After the external force disappears, it pushes the movable limit piece 3 to move down and reset. The guide limit rod 23 is inserted into the slot 34 at the top of the hook body 31 to limit the deformation of the spring and guide the axial sliding of the hook body 31 to avoid skew and jamming. The recessed top opening 24 of the pull hook 2 optimizes the alignment and force application, and the bottom arc surface reduces cable damage, thus improving the overall operational safety and reliability.
[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An insulation protection device for power system commissioning, comprising a telescopic insulating rod (1) and an anti-slip handle (11), characterized in that, The telescopic insulating rod (1) is equipped with a pull hook (2) at its top, and a movable limiting component (3) is provided inside the pull hook (2). The movable limiting component (3) includes a hook body (31), a horizontal plate (32) and a side baffle (33). The horizontal plate (32) is installed on one side of the hook body (31), and the side baffle (33) is installed on one end of the hook body (31). The pull hook (2) has a movable inner cavity (21). The hook body (31) and the horizontal plate (32) are slidably connected to the inner wall of the movable inner cavity (21). An opening is provided on one side of the pull hook (2), and the side baffle (33) blocks the opening of the pull hook (2) when it rises.
2. An insulation protection device for power system commissioning according to claim 1, characterized in that, Each section of the telescopic insulating rod (1) has a clearance groove (12) on its side wall, and an indicator light (13) is installed on the inner wall of several clearance grooves (12).
3. An insulation protection device for power system commissioning according to claim 1, characterized in that, The movable inner cavity (21) has a clearance groove (211) on the top side inside, and a reset spring (22) is installed on the inner wall of the clearance groove (211). The reset spring (22) is installed on the top of the hook body (31).
4. An insulation protection device for power system commissioning according to claim 3, characterized in that, The inner wall of the clearance groove (211) is equipped with a guide limit rod (23), the top of the hook body (31) is provided with a slot (34), the reset spring (22) is sleeved on the outside of the guide limit rod (23), and the guide limit rod (23) is inserted into the inner wall of the slot (34).
5. An insulation protection device for power system commissioning according to claim 1, characterized in that, The top of the lever hook (2) is provided with a recessed top opening (24), and the bottom of the lever hook (2) is provided with an arc surface.