Anti-misoperation locking bolt device of high-voltage isolating switch
By designing the control wristband and latch device, the problem of easy corrosion and blockage of the high-voltage disconnect switch safety lock is solved, achieving high safety and low energy consumption automatic latch locking, which is suitable for long-term outdoor use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUZHOU HUAYIN THERMAL POWER GENERATION
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-05
AI Technical Summary
The safety locks of existing high-voltage disconnect switches are susceptible to corrosion from moisture and blockage from dust, making them difficult to open and affecting normal maintenance operations.
It employs a control wristband, base, and control pin device, utilizing components such as NFC tags and electromagnets to achieve automatic locking and unlocking of the pin, preventing corrosion, and protecting the internal structure with sealing rubber.
It improves safety and reliability, reduces power consumption, and ensures stability during long-term outdoor operation.
Smart Images
Figure CN224204021U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of high-voltage disconnect switches and relates to a high-voltage disconnect switch anti-misoperation locking pin device. Background Technology
[0002] Outdoor high-voltage disconnect switches are typically installed at the incoming or outgoing ends of a substation to enable or disable high-voltage circuits.
[0003] Some high-voltage disconnect switches use an operating handle to control the contact opening or closing. To prevent accidental contact closure, a "safety lock" is usually installed on the operating handle, and it is required that only personnel with direct contact with the high-voltage circuit can control it to ensure safety.
[0004] At present, safety locks can be either factory-installed on the equipment or added later to the power system. Mechanical locks are commonly used, as they have the advantages of simple structure and high reliability.
[0005] However, safety locks are mostly located on the outside of the high-voltage disconnector box and are not opened for extended periods. Therefore, prolonged exposure to moisture and dust accumulation in the air vents often leads to rusting of the safety locks or blockage of the keyholes. Consequently, difficulties in opening the safety locks during maintenance often disrupt normal operations, sometimes necessitating the use of tools to break the locks. Summary of the Invention
[0006] To overcome the shortcomings of the aforementioned related technologies, this utility model proposes a high-voltage disconnect switch anti-misoperation interlocking pin device. It features a high safety factor and suitability for long-term outdoor operation.
[0007] To achieve the above technical objectives, the high-voltage disconnect switch anti-misoperation interlocking pin device of this utility model is applicable to high-voltage disconnect switches. The high-voltage disconnect switch includes an operating handle and a bracket. The bracket is fixed relative to the ground, and the operating handle is connected to the bracket through a bearing.
[0008] The high-voltage disconnect switch anti-misoperation interlocking pin device includes: a control wristband, a base, and a control pin. The control wristband is equipped with an NFC tag. The base is fixed to the bracket and has two pin holes. The control pin is fixed to the operating handle and includes a pin rod and an NFC reader. The pin rod is adapted to the pin hole of the base. When the center line of the pin rod is collinear with the center line of the pin hole, the pin rod is movably inserted into the pin hole. The control pin reads the NFC tag of the control wristband and controls the pin rod to disengage from the pin hole.
[0009] Preferably, the control pin further includes: a housing, a return spring, an electromagnet, an intermediate relay, a power supply, and a microprocessor. The housing is fixed to the rotating rod of the operating handle. A pin guide tube is provided inside the housing. The pin rod is movably disposed within the pin guide tube and has a tendency to reciprocate along the extension direction of the pin guide tube. The pin rod protrudes from inside the housing to the outside of the housing and is inserted into the pin hole. The return spring is fitted onto the pin rod and is configured to push the pin rod outward from the housing. The electromagnet is fixed within the housing at one end of the pin rod. One end of the contact of the intermediate relay is electrically connected to the electromagnet. The power supply is electrically connected to the other end of the contact of the intermediate relay. The microprocessor is electrically connected to the coil of the intermediate relay and the NFC card reader.
[0010] Preferably, the base comprises phenolic plastic. The pin rod includes a movable rod and an insulating layer. The movable rod is an iron rod and an iron block. The iron rod is fixedly connected to the iron block, and the iron block is close to the electromagnet. The outer side of the iron rod is covered by the insulating layer, which comprises rigid polyvinyl chloride. The movable rod is movably inserted into the pin guide tube.
[0011] Preferably, the high-voltage disconnect switch anti-misoperation interlocking pin device further includes a sealing rubber. The sealing rubber is fixed on the housing and is an annular sealing ring. The movable rod is movably inserted into the sealing rubber, and the sealing rubber seals the inside of the housing from the outside.
[0012] Preferably, the control latch further includes a power switch, which is disposed on the positive main output circuit of the power supply.
[0013] The beneficial effects of this utility model are as follows:
[0014] This utility model uses an outer shell and a base, which can protect the internal structure of the outer shell and prevent corrosion. At the same time, it controls the pin and the pin hole of the base from rusting, which can form a lock while preventing it from locking due to rust.
[0015] This invention uses a return spring, which enables the control pin to complete the locking operation autonomously, reducing power consumption and providing long-term protection. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a structural diagram of the present invention;
[0018] Figure 2 This is a side view of the present invention.
[0019] Figure 3 This is a structural diagram of the control wristband of this utility model;
[0020] Figure 4 This is a structural diagram of the base of this utility model;
[0021] Figure 5 This is a cross-sectional view of the control pin of this utility model;
[0022] Figure 6 This is a diagram showing the internal circuit structure of the control pin of this utility model. Detailed Implementation
[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model.
[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0026] like Figures 1 to 6 As shown in some embodiments of this utility model, the high-voltage disconnect switch anti-misoperation interlocking pin device is applicable to high-voltage disconnect switches. The high-voltage disconnect switch includes: an operating handle 1 and a bracket 2. The bracket 2 is fixed relative to the ground, and the operating handle 1 is connected to the bracket 2 through a bearing.
[0027] The high-voltage disconnect switch anti-misoperation interlocking pin device includes: a control wristband 3, a base 4, and a control pin 5. The control wristband 3 is equipped with an NFC tag. The base 4 is fixed to the bracket 2 and has two pin holes 41. The control pin 5 is fixed to the operating handle 1 and includes a pin rod 56 and an NFC card reader 57. The pin rod 56 is adapted to the pin holes 41 of the base 4. When the center line of the pin rod 56 is collinear with the center line of the pin hole 41, the pin rod 56 is movably inserted into the pin hole 41. The control pin 5 reads the NFC tag of the control wristband 3 and controls the pin rod 56 to disengage from the pin hole 41.
[0028] The control pin 5 further includes: a housing 51, a return spring 52, an electromagnet 53, an intermediate relay KA, a power supply 54, and a microprocessor 55. The housing 51 is fixed to the rotating rod of the operating handle 1. A pin guide tube is provided inside the housing 51. The pin rod 56 is movably disposed within the pin guide tube and has a tendency to reciprocate along the extension direction of the pin guide tube. The pin rod 56 protrudes from inside the housing 51 to the outside of the housing 51 and is inserted into the pin hole 41. The return spring 52 is fitted onto the pin rod 56, and the return spring 52 is configured to push the pin rod 56 outward from the housing 51. The electromagnet 53 is fixed within the housing 51 at one end of the pin rod 56. One end of the contact KA1.1 of the intermediate relay KA is electrically connected to the electromagnet 53. The power supply 54 is electrically connected to the other end of the contact KA1.1 of the intermediate relay KA. The microprocessor 55 is electrically connected to the coil KA1.2 of the intermediate relay KA and the NFC card reader 57.
[0029] The base 4 is made of phenolic plastic. The pin rod 56 includes a movable rod and an insulating layer. The movable rod is an iron rod and an iron block. The iron rod is fixedly connected to the iron block, and the iron block is close to the electromagnet 53. The outer side of the iron rod is covered by the insulating layer, which is made of rigid polyvinyl chloride. The movable rod is movably inserted into the pin guide tube.
[0030] The high-voltage disconnect switch anti-misoperation interlocking pin device also includes a sealing rubber. The sealing rubber is fixed on the housing 51. The sealing rubber is an annular sealing ring. The movable rod is movably inserted into the sealing rubber. The sealing rubber seals the inside of the housing 51 with the outside.
[0031] The control pin 5 also includes a power switch, which is located on the positive main output circuit of the power supply 54.
[0032] The control wristband 3 includes an elastic ring and a plastic plate. An NFC tag is affixed to the plastic plate. A specific code is pre-written into the NFC tag. There can be two control wristbands 3. During maintenance, the substation control center can only issue one control wristband 3 at a time. After the maintenance is completed, the wristband is retrieved. The other control wristbands 3 are for backup.
[0033] The base 4 can be an annular cylinder, and is fixed to the bracket 2 by screws. The center line of the bearing on the bracket 2 is collinear with the center line of the base 4. Two pin holes 41 are provided on the side of the base 4 away from the bracket 2. These pin holes 41 can be blind holes. The position of the first pin hole 41 corresponds to the closed state of the high-voltage disconnector contact KA1.1. At this time, the pin is inserted into the first pin hole 41, locking the operating handle 1. The position of the second pin hole 41 corresponds to the open state of the high-voltage disconnector contact KA1.1. At this time, the pin is inserted into the first pin hole 41, locking the operating handle 1.
[0034] The outer casing 51 is made of rigid plastic, such as rigid polyvinyl chloride. The outer casing 51 has a pin guide tube inside, which can be a pipe fitting and is integrally formed with the outer casing 51. The pin rod 56 is movably disposed inside the pin guide tube.
[0035] An annular protrusion is fixed on the pin 56 between the pin guide tube and the pin 56 outlet of the housing 51. A return spring 52 is fitted on the pin 56 between the annular protrusion and the pin guide tube. Under the action of the return spring 52, the pin 56 can be driven to protrude from the housing 51, so that the pin 56 is inserted into the corresponding pin hole 41, thus completing the relative locking between the operating handle 1 and the bracket 2.
[0036] When the operating handle 1 needs to be rotated, the control wristband 3 is attached to the outer shell 51, and the NFC card reader 57 is embedded in the outer shell 51. After the NFC card reader 57 reads the encoded data, the microprocessor 55 compares the encoded data uploaded by the NFC card reader 57 with the previously written data. If they are consistent, it means that the control wristband 3 has obtained authorization from the control center. The intermediate relay KA is then closed, and the electromagnet 53 can pull the pin rod 56 into the outer shell 51, separating the outer shell 51 from the base 4. The operating handle 1 can then be rotated. After the operation is completed, the power switch is turned off, and the pin rod 56 protrudes back into the pin hole 41.
[0037] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0038] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A high-voltage disconnector anti-misoperation interlocking pin device, applicable to high-voltage disconnectors, wherein the high-voltage disconnector comprises: An operating handle and a bracket, wherein the bracket is fixed relative to the ground, and the operating handle is connected to the bracket via a bearing, characterized in that the high-voltage disconnect switch anti-misoperation interlocking pin device includes: A control wristband, wherein an NFC tag is provided on the control wristband; A base, which is fixed to the bracket, has two pin holes. A control pin is fixed to the operating handle. The control pin includes a pin rod and an NFC card reader. The pin rod is adapted to the pin hole of the base. When the center line of the pin rod is collinear with the center line of the pin hole, the pin rod is movably inserted into the pin hole. The control pin reads the NFC tag of the control bracelet and controls the pin rod to disengage from the pin hole.
2. The high-voltage disconnector anti-misoperation interlocking pin device according to claim 1, characterized in that, The control latch also includes: The housing is fixed to the rotating rod of the operating handle. A pin guide tube is provided inside the housing. The pin rod is movably disposed in the pin guide tube. The pin rod has a tendency to reciprocate along the extension direction of the pin guide tube. The pin rod protrudes from the inside of the housing to the outside of the housing and is inserted into the pin hole. A return spring is fitted onto the pin rod, and the return spring is configured to push the pin rod outward from the housing. An electromagnet, the electromagnet being fixed inside the housing at one end of the pin rod; An intermediate relay, wherein one end of the contact of the intermediate relay is electrically connected to the electromagnet; A power source, which is electrically connected to the other end of the contacts of the intermediate relay; The microprocessor is electrically connected to the coil of the intermediate relay and the NFC card reader.
3. The high-voltage disconnector anti-misoperation interlocking pin device according to claim 2, characterized in that, The base is made of phenolic plastic; The pin rod includes a movable rod and an insulating layer. The movable rod is an iron rod and an iron block. The iron rod is fixedly connected to the iron block, and the iron block is close to the electromagnet. The outer side of the iron rod is covered by the insulating layer, which includes rigid polyvinyl chloride. The movable rod is movably inserted into the pin guide tube.
4. The high-voltage disconnector anti-misoperation interlocking pin device according to claim 3, characterized in that, The high-voltage disconnect switch anti-misoperation interlocking pin device also includes a sealing rubber. The sealing rubber is fixed on the housing and is an annular sealing ring. The movable rod is movably inserted into the sealing rubber, and the sealing rubber seals the inside of the housing from the outside.
5. The high-voltage disconnector anti-misoperation interlocking pin device according to claim 4, characterized in that, The control latch also includes a power switch, which is located on the positive output circuit of the power supply.