A hook structure suitable for air switches
By designing fasteners and hook structures on the air switch, using threaded parts instead of terminal screws, and combining them with baffle limits, the problem of easy signage falling off is solved, achieving safe and stable signage hanging. It is suitable for various air switch models and prevents misoperation and electric shock.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI ENERGY GRP EZHOU POWER GENERATION CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-05-26
AI Technical Summary
The lack of suitable hook structure in existing air switches makes it easy for the labels to fall off, which cannot effectively prevent accidental operation. Furthermore, there is nowhere to hang them during multiple maintenance tasks, which affects safety.
A structure including fasteners and hooks was designed, using threaded parts to replace the screws of the air switch terminals, and achieving a stable fixation of the hooks through detachable connections. A baffle was set at the hook and connection point to limit the movement range of the sign and avoid the risk of falling off and electric shock.
It ensures the safe and secure hanging of signs, avoids the risk of misoperation and electric shock, is suitable for different types of air switches, and meets the needs of multiple maintenance tasks.
Smart Images
Figure CN224288186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air switch technology, and in particular to a hook structure suitable for air switches. Background Technology
[0002] Air circuit breakers are ubiquitous electrical devices used in daily life and production. They control primary and secondary circuits and come in various types, including single-pole (1P), double-pole (2P), three-pole (3P), and four-pole (4P). They typically include an operating handle with functions such as switch information, on / off indicators, trip reset buttons, and protection setting adjustments.
[0003] Air circuit breakers are commonly used in the power generation industry, as a large number of low-voltage electrical devices throughout the power generation process require their control. These devices need to be powered on or off during maintenance and operation. Power outages and restorations are particularly frequent during equipment maintenance and commissioning. Due to the large number of devices, misoperation often occurs during power outages and restorations. Such misoperations can lead to equipment damage, personal injury, and incalculable economic losses. To prevent such accidents, we often use signs such as "Do Not Close, People Working" and "Working Here" to remind operators. These signs are clearly marked and numbered, with each number corresponding to a work order for a specific maintenance task, which helps prevent misoperation to some extent.
[0004] In actual production, circuit breakers are relatively small, and there is no dedicated place to hang identification tags, making it difficult to attach the tags. Even if they are attached, the tags often fall off due to vibrations from closing the cabinet door or wind when operators open the cabinet again or during other disturbances, rendering them ineffective as a warning. Furthermore, when multiple maintenance tasks require multiple tags to be attached to a single switch, there may be situations where there is nowhere to hang them. This results in the tags failing to prevent misoperation and facilitate finding the corresponding work order.
[0005] In the prior art, patent publication number CN 222774941 U discloses a hook for a secondary power circuit breaker identification sign. This patent proposes a method for attaching the hook to the circuit breaker. The area above the circuit breaker handle often contains important functions such as switch information, on / off indicators, trip reset buttons, and protection setting adjustments, leaving insufficient space for attaching the hook. Furthermore, this method only works when there is sufficient blank space on the circuit breaker, lacking universality. Additionally, the identification signs have a certain weight, and when multiple maintenance tasks require hanging multiple signs on a single switch, the attachment method is not secure and they are prone to falling off over time.
[0006] Therefore, it is necessary to design a hook structure suitable for air switches to solve the above problems. Utility Model Content
[0007] The purpose of this invention is to provide a hook structure suitable for air switches that enables the safe and secure hanging of signs without occupying space on the air switch body.
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A hook structure suitable for air switches, comprising:
[0010] Fastener, including a threaded portion having external threads and a first connecting portion connected to the threaded portion;
[0011] The hook is detachably connected to the first connecting part via the second connecting part, and a baffle made of insulating material is sleeved at the connection between the hook and the second connecting part to limit the movement range of the sign.
[0012] As a further improvement of this utility model, the diameter of the first connecting part is larger than the diameter of the threaded part.
[0013] As a further improvement of this utility model, the first connecting part and the second connecting part are threaded together.
[0014] As a further improvement of this utility model, the first connecting part is provided with a fixing groove to facilitate screwing the threaded part into the air switch terminal.
[0015] As a further improvement of this utility model, the fixing groove is a cross groove.
[0016] As a further improvement of this utility model, the first connecting part is covered with an insulating skin.
[0017] As a further improvement of this utility model, the insulating material is natural rubber.
[0018] As a further improvement of this utility model, the hook is in the shape of a bent hook.
[0019] As a further improvement of this utility model, the hook and the second connecting part are both made of epoxy resin glass fiber composite material.
[0020] As a further improvement of this utility model, the end of the first connecting part away from the threaded part is also provided with an indicator to ensure that the hook and fastener are always in an open vertically upward state when they are securely connected.
[0021] The beneficial effects of this utility model are:
[0022] 1. By setting a threaded part, this utility model can replace the screws of the existing air switch inlet or outlet terminals. While tightening the wires, the second connecting part and the first connecting part are detachably connected, so as to fix the hook firmly to the air switch without occupying the space on the air switch body, thus facilitating the safe and secure hanging of the sign.
[0023] 2. By setting a baffle at the connection between the hook and the second connecting part, this utility model can, on the one hand, limit the movement range of the signboard, so that the signboard can always be located on the hook, and prevent the signboard from moving too close to the terminal on the second connecting part or fastener under the action of external forces such as wind. On the other hand, the baffle can also serve as an insulating plate to avoid the risk of electric shock that may be caused by operators accidentally touching the fastener during the hanging of the signboard.
[0024] 3. This utility model utilizes the second connecting part and the first connecting part to achieve a detachable connection between the hook and the fastener, which facilitates the connection of the hook as needed. When it is necessary to hang a sign, the hook can be connected to the fastener, and when it is not necessary to hang a sign, the hook can be disassembled. The overall operation is simple and the connection is stable. When multiple maintenance tasks need to be hung on the same air switch, the hook structure of this utility model can also meet the requirements. The hook structure is applicable to 1P, 2P, 3P, and 4P switches. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of the hook structure applicable to air switches according to this utility model.
[0026] Figure 2 This is a disassembly diagram of the hook structure.
[0027] Figure 3 This is a side view of the first connecting part.
[0028] Figure 4 This is a schematic diagram of the use of a hook structure in a three-pole switch (3P).
[0029] Figure Labels
[0030] 11. Threaded part; 12. First connecting part; 121. Cross groove; 122. Marking element; 123. Insulating skin; 20. Second connecting part; 30. Hook; 31. Baffle. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.
[0033] Additionally, it should be noted that 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.
[0034] Please see Figures 1-4 As shown, this utility model provides a hook structure suitable for air switches, comprising:
[0035] The fastener includes a threaded portion 11 with external threads and a first connecting portion 12 connected to the threaded portion 11;
[0036] The hook 30 is detachably connected to the first connecting part 12 via the second connecting part 20, and a baffle 31 made of insulating material is sleeved at the connection between the hook 30 and the second connecting part 20 to limit the movement range of the sign.
[0037] For example, the first connecting part 12 and the second connecting part 20 are threadedly connected. The first connecting part 12 is a housing with an outer diameter larger than the diameter of the threaded part 11, and an internal thread is provided inside the housing. The second connecting part 20 is provided with an external thread that matches the internal thread of the first connecting part 12.
[0038] like Figure 3 As shown, a cross groove 121 is provided at one end of the first connecting part 12 near the threaded part 11. The area where the cross groove 121 is located is smaller than the inner diameter of the first connecting part 12. The cross groove 121 provides a point of force to facilitate screwing the threaded part 11 into the air switch terminal.
[0039] The structure of the fastener from the cross groove 121 to the threaded part 11 is the same as that of the existing screw. That is, the fastener can be used to replace the screws of the switch inlet terminal or outlet terminal to fasten the wire. At the same time, the detachable connection between the first connecting part 12 and the second connecting part 20 allows the hook structure to be firmly fixed to the air switch terminal part without occupying space on the air switch body to complete the fixation between the hook 30 and the air switch.
[0040] In other embodiments, a point of force may be provided on the outside of the first connection portion 12 to facilitate screwing the threaded portion 11 into the air switch terminal.
[0041] Specifically, the first connecting part 12 is covered with an insulating skin 123. For example, the insulating skin 123 is made of relatively soft and elastic natural rubber. When measuring the voltage of the incoming or outgoing terminals, the insulating skin can be pushed away with a test pen, and then restored to its original state after measurement, without affecting the voltage measurement function of the terminal screw. The insulating skin 123 can prevent the operator from being electrocuted after the hook 30 structure is installed in the air switch terminal.
[0042] Specifically, the baffle 31 serves two purposes: firstly, it limits the movement range of the sign, ensuring that the sign remains on the hook 30 and preventing it from moving too close to the terminal on the second connection part 20 or fastener under the influence of external forces such as wind; secondly, the baffle 31 also acts as an insulating plate, preventing the risk of electric shock that may occur if the operator accidentally touches the fastener during the hanging of the sign.
[0043] For example, the baffle 31 is annular.
[0044] For example, the hook 30 is in the shape of a hook; the material of the hook 30 is epoxy resin glass fiber composite material, which has high insulation and bending resistance, pressure resistance, moisture and heat resistance and corrosion resistance.
[0045] The materials of the second connecting part 20 and the baffle 31 are the same as those of the hook 30.
[0046] Specifically, a marking element 122 is provided at the end of the first connecting part 12 away from the threaded part 11. Figure 3 By further coordinating the number of thread turns of the second connecting part 20, the hook 30 can be connected to the first connecting part 12 and the second connecting part 20 in a predetermined initial posture relative to the marker 122. This ensures that when the hook 30 is fixed, it is in a fixed posture with its opening facing upwards, which is conducive to the hanging of the sign. For example, when connecting the hook 30 to the fastener, the hook 30 is screwed in with its opening aligned with the orientation of the marker 122 as the initial posture. This ensures that the hook 30 maintains an upward-facing posture, avoiding the situation where, under conventional installation methods, the hook 30 is ultimately fastened to the first connecting part 12 with its opening facing downwards or in another non-vertically upward direction, which would affect the hanging stability of the sign. Here, the hook 30 is used for hanging the sign and also serves as a connection indicator. The number of thread turns and the setting of the marker 122 ensure that the hook 30 and the fastener maintain a relatively stable posture, thus guaranteeing the hanging effect of the sign. Regarding the specific thread settings of the second connecting part 20 and the first connecting part 12, adjustments are made according to existing technology so that the number of thread turns, in conjunction with the initial posture of the marking part 122 and the hook 30, ensures that the hook 30 and the fastener maintain a relatively stable state and always have the opening facing upward.
[0047] Specifically, the fasteners are made of brass, which has high mechanical strength and a tensile strength of ≥400MPa, and can meet the needs of frequent tightening operations.
[0048] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.
Claims
1. A hook structure suitable for an air switch, characterized by, include: Fastener, including a threaded portion having external threads and a first connecting portion connected to the threaded portion; The hook is detachably connected to the first connecting part via the second connecting part, and a baffle made of insulating material is sleeved at the connection between the hook and the second connecting part to limit the movement range of the sign.
2. The hook structure suitable for an air switch according to claim 1, characterized in that: The diameter of the first connecting part is larger than the diameter of the threaded part.
3. The hook structure suitable for an air switch according to claim 1, characterized in that: The first connecting part and the second connecting part are threaded together.
4. The hook structure for air switches according to claim 1, characterized in that: The first connecting part is provided with a fixing groove to facilitate screwing the threaded part into the air switch terminal.
5. The hook structure for an air switch according to claim 4, characterized in that: The fixing groove is a cross-shaped groove.
6. The hook structure for an air switch according to claim 1, characterized in that: The first connecting part is covered with an insulating sheath.
7. The hook structure for an air switch according to claim 6, characterized in that: The insulating material is natural rubber.
8. The hook structure for an air switch according to claim 1, characterized in that: The hook is in the shape of a curved hook.
9. The hook structure for an air switch according to claim 1, characterized in that: Both the hook and the second connecting part are made of epoxy resin glass fiber composite material.
10. The hook structure for an air switch according to claim 1, characterized in that: The first connecting part is also provided with a marking element at the end away from the threaded part to ensure that the hook and fastener are always in an open and vertically upward state when they are securely connected.