Locking device for disconnecting switch position indication test
By designing a locking device on the disconnecting switch and using a locking mechanism to lock the slider and sliding conductor, the displacement problem caused by vibration or mechanical stress during the test of the disconnecting switch is solved, which improves the accuracy of the position indication test and the operational safety of the disconnecting switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 国电博纳(北京)电力设备有限公司
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-05
AI Technical Summary
The lack of a locking mechanism in the position indication test of the disconnecting switch may cause the sliding conductor to shift due to vibration or mechanical stress, affecting the accuracy and safety of the position indication test.
Design a locking device for disconnecting switches, including a support assembly, a connecting rod and a slider, which locks the slider in the grounding trip position when it comes into contact with the sliding conductor through a locking mechanism to prevent displacement caused by vibration or mechanical stress.
It improves the accuracy of position indication experiments, ensures the accuracy and safety of disconnector operation, and has a simple structure that is easy to install and operate, reducing the difficulty of operation for staff.
Smart Images
Figure CN224204020U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of disconnector switch technology, and in particular to a locking device for disconnector switch position indication testing. Background Technology
[0002] Disconnect switches are critical operating devices in power transmission and transformation systems. Their main function is to achieve circuit isolation and grounding operations, ensuring the safe operation of the power system. During the factory testing of disconnect switches, a position indication test is required to ensure the reliability and safety of the disconnecting grounding switch. When performing the position indication test, the sliding conductor of the disconnect switch must be fixed in the grounding open position. During the test, due to the lack of a locking mechanism, the sliding conductor may shift due to vibration or mechanical stress, leading to inaccurate position indication test results. Inaccurate position indication test results reduce the accuracy and safety of disconnect switch operation, affecting the stable operation of the power system. Summary of the Invention
[0003] In view of this, this application proposes a locking device for a disconnector position indication test, suitable for installation between a sliding conductor and a grounding contact; comprising: a support assembly, a connecting rod, and a slider;
[0004] The support assembly includes a base and a cover plate; the base has a cavity with an opening on one side, the cover plate is located at the opening of the base, and one end of a connecting rod passes through the cover plate and is rotatably mounted in the cavity of the base.
[0005] The slider is located at the end of the connecting rod away from the base, and the slider can move along the axial direction of the connecting rod so that when the connecting rod rotates, it drives the slider to abut against the sliding conductor.
[0006] A locking mechanism is installed on the connecting rod. The locking mechanism moves along the axial direction of the connecting rod and is used to lock the slider when the slider comes into contact with the sliding conductor.
[0007] In one possible implementation, the locking mechanism is a locking nut; the connecting rod has external threads, and the locking nut is fitted onto the connecting rod and threadedly connected to the connecting rod.
[0008] In one possible implementation, the connecting rod includes: a support portion and a screw portion; the support portion is rotatably disposed in the cavity of the base, and one end of the support portion protrudes from the base and is connected to the screw portion;
[0009] The slider has a threaded hole, and the slider is threaded to the end of the screw that is away from the support.
[0010] In one possible implementation, the support assembly also includes two thrust ball bearings;
[0011] The outer wall of the support is provided with a protrusion; the two thrust ball bearings are both located in the cavity of the base and are located on both sides of the protrusion.
[0012] In one possible implementation, the support portion has a milled flat portion at one end near the screw portion; and the milled flat portion is located between the base and the screw portion.
[0013] In one possible implementation, screws are also included; the screws pass through the cover plate and securely connect it to the base.
[0014] Beneficial effects of this application
[0015] The base of the locking device is installed in the groove of the grounding contact. In the initial state, the slider and the sliding conductor maintain a certain distance. When a grounding trip test is required, the connecting rod is rotated, which drives the slider to move along its axis until the slider abuts against the sliding conductor. Then, the locking mechanism is moved to move along the axis of the connecting rod and make tight contact with the end face of the slider away from the sliding conductor. The locking mechanism and the connecting rod cooperate to firmly lock the slider in the current position, preventing the sliding conductor from shifting due to vibration or mechanical stress. After the test is completed, the locking mechanism is moved in the opposite direction to separate it from the end face of the slider, releasing the lock on the slider. Then, the connecting rod is rotated in the opposite direction to move the slider along the axis of the connecting rod to return to the initial position, thus realizing the reset operation of the locking device.
[0016] The locking device of this application, by setting a locking mechanism, can lock the slider when it abuts against the sliding conductor. By locking the slider, the locking mechanism locks the sliding conductor of the disconnecting switch in the grounding trip position, effectively preventing displacement of the sliding conductor due to vibration, mechanical stress, or other factors during the test. By setting the locking mechanism, the sliding conductor is always kept in an accurate position, thereby improving the accuracy of the position indication test results. The accuracy of the position indication test results provides a reliable basis for judging the grounding trip position of the disconnecting switch, thus ensuring the accuracy and safety of the disconnecting switch operation. At the same time, the locking device of this application has a simple structure, is easy to install and operate, reduces the difficulty of operation for workers, and improves work efficiency.
[0017] By circumferentially protruding on the outer wall of the support and placing two thrust ball bearings on both sides of the protrusion, when the support rotates, the rolling friction of the thrust ball bearings replaces the sliding friction between the support and the base cavity, effectively reducing friction and wear between the support and the base, making the rotation of the support smoother and extending the service life of the locking device.
[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0020] Figure 1 This diagram shows the main structure of the locking device of this application;
[0021] Figure 2 This application shows a front view of the linkage;
[0022] Figure 3 This application shows a structural diagram illustrating the experimental requirements of the test apparatus.
[0023] Base—110; Cover plate—120; Screw—130; Thrust ball bearing—140; Connecting rod—200; Support part—210; Screw part—220; Milled flat part—230; Protrusion—240; Slider—310; Locking nut—320; Sliding conductor—410; Grounding contact—420. Detailed Implementation
[0024] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0025] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" 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 or 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.
[0026] Furthermore, 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, "a plurality of" means two or more, unless otherwise explicitly specified.
[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0028] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.
[0029] This application proposes a locking device for testing the position indication of a disconnector switch, such as... Figures 1 to 3 As shown, it is suitable for installation between a sliding conductor 410 and a grounding contact 420; it includes: a support assembly, a connecting rod 200, and a slider 310; the support assembly includes a base 110 and a cover plate 120; the base 110 has a cavity with an opening on one side, the cover plate 120 is disposed at the opening of the base 110, one end of the connecting rod 200 passes through the cover plate 120 and is rotatably disposed in the cavity of the base 110, the slider 310 is disposed at the end of the connecting rod 200 away from the base 110, and the slider 310 can move along the axial direction of the connecting rod 200 so that when the connecting rod 200 rotates, it drives the slider 310 to abut against the sliding conductor 410; a locking mechanism is installed on the connecting rod 200, the locking mechanism moves along the axial direction of the connecting rod 200, and is suitable for moving to the side of the slider 310 away from the sliding conductor 410 and abutting against the slider 310 when the slider 310 abuts against the sliding conductor 410 to lock the slider 310.
[0030] It should be noted that the locking device of this application is particularly suitable for locking the grounding open position of the sliding conductor of the disconnecting switch during position indication tests of the disconnecting switch in a 145kV GIS. The outer contour of the base 110 matches the groove of the grounding contact 420, so that the base 110 can be installed in the groove of the grounding contact 420. The base 110 provides a stable support foundation for the entire locking device. The base 110 has a cavity with an opening on one side, providing space for the installation and rotation of the connecting rod 200. The cover plate 120 cooperates with the base 110 to form a closed space, protecting the connecting rod 200 and other components in the cavity of the base 110 from interference and damage from the external environment. The cover plate 120 has a through hole, which is connected to the cavity of the base 110. One end of the connecting rod 200 passes through the through hole and extends into the cavity of the base 110. The slider 310 can rotate within the cavity of the base 110. When the connecting rod 200 rotates, it drives the slider 310 to move along its axial direction, thereby making the slider 310 abut against the sliding conductor 410. The locking mechanism is installed on the connecting rod 200 and is located between the slider 310 and the base 110. After the slider 310 abuts against the sliding conductor 410, the locking mechanism is moved to the side of the slider 310 away from the sliding conductor 410 and abuts against the slider 310, so that the locking mechanism locks the slider 310, thereby locking the sliding conductor 410 of the disconnecting switch in the grounding trip position. This avoids the situation where the slider 310 is displaced due to vibration, external force interference, or other factors during the experiment, thus preventing the sliding conductor 410 from being displaced. This ensures that the slider 310 can always maintain a stable abutment with the sliding conductor 410.
[0031] The base 110 of the locking device is installed in the groove of the grounding contact 420. In the initial state, the slider 310 and the sliding conductor 410 maintain a certain distance. When a grounding trip test is required, the connecting rod 200 is rotated, which drives the slider 310 to move along its axial direction until the slider 310 abuts against the sliding conductor 410. Then, the locking mechanism is moved so that it moves along the axial direction of the connecting rod 200 and makes tight contact with the end face of the slider 310 away from the sliding conductor 410. The locking mechanism and the connecting rod 200 cooperate with each other to firmly lock the slider 310 in the current position, avoiding the displacement of the sliding conductor 410 due to vibration or mechanical stress. After the test is completed, the locking mechanism is moved in the opposite direction to separate it from the end face of the slider 310, releasing the lock on the slider 310. Then, the connecting rod 200 is rotated in the opposite direction to move the slider 310 along the axial direction of the connecting rod 200 to return to the initial position, thereby realizing the reset operation of the locking device.
[0032] The locking device of this application, by setting a locking mechanism, can lock the slider 310 when it abuts against the sliding conductor 410. By locking the slider 310, the locking mechanism locks the sliding conductor 410 of the disconnecting switch in the grounding open position, effectively preventing the sliding conductor 410 from shifting due to vibration, mechanical stress, or other factors during the test. By setting the locking mechanism, the sliding conductor 410 is always kept in an accurate position, thereby improving the accuracy of the position indication test results. The accuracy of the position indication test results provides a reliable basis for judging the grounding open position of the disconnecting switch, thus ensuring the accuracy and safety of the disconnecting switch operation. At the same time, the locking device of this application has a simple structure, is easy to install and operate, reduces the difficulty of operation for workers, and improves work efficiency.
[0033] Furthermore, both the base 110 and the slider 310 are made of aluminum alloy. The base 110 and slider 310 made of aluminum alloy have a low density, which reduces the weight of the base 110 and slider 310. In addition, the production cost of aluminum alloy is relatively low, which can effectively reduce production costs while ensuring good mechanical performance of the locking device.
[0034] Furthermore, both the connecting rod 200 and the cover plate 120 are made of Q235 steel.
[0035] In one possible implementation, the locking mechanism is a locking nut 320; the connecting rod 200 is provided with external threads, and the locking nut 320 is sleeved on the connecting rod 200 and threadedly connected to the connecting rod 200.
[0036] It should be noted that the external thread on the connecting rod 200 provides the basis for the connection of the locking nut 320, allowing the locking nut 320 to be firmly fixed to the connecting rod 200 through the threaded connection. Through the threaded engagement with the connecting rod 200, when the slider 310 abuts against the sliding conductor 410, tightening the locking nut 320 makes the end face of the locking nut 320 rigidly abut against the side of the slider 310 away from the sliding conductor 410. The frictional force of the external thread of the connecting rod 200 and the normal pressure of the end face of the locking nut 320 work together to form a double mechanical lock on the slider 310, avoiding the displacement of the slider 310 and the sliding conductor 410 due to factors such as vibration and external interference, and ensuring that the slider 310 and the sliding conductor 410 always remain in the accurate position.
[0037] In one possible implementation, the locking nut 320 is an M16 hex nut.
[0038] In one possible implementation, the connecting rod 200 includes: a support portion 210 and a screw portion 220; the support portion 210 is rotatably disposed in the cavity of the base 110, and one end of the support portion 210 protrudes from the base 110 and is connected to the screw portion 220; the slider 310 has a threaded hole, and the slider 310 is threadedly connected to the end of the screw portion 220 away from the support portion 210.
[0039] It should be noted that the support part 210 provides a stable fulcrum for the rotation of the connecting rod 200, ensuring that the connecting rod 200 can move smoothly and accurately during rotation. The external thread of the screw part 220 matches the threaded hole of the slider 310. When the screw part 220 rotates with the support part 210, the threaded hole on the slider 310 meshes with the external thread of the screw part 220. Due to the helix angle characteristic of the thread, the rotational motion of the connecting rod 200 is converted into the linear motion of the slider 310 along the axial direction of the screw part 220, thereby causing the slider 310 to move towards or away from the base 110 along the axial direction of the screw part 220, thus realizing the contact or separation of the slider 310 and the sliding conductor 410. At the same time, the threaded connection design has a certain self-locking characteristic. When the slider 310 contacts the sliding conductor 410, the screw part 220 can maintain the position of the slider 310, preventing the slider 310 from moving easily due to external force.
[0040] Furthermore, such as Figure 1 As shown, the threaded hole on the slider 310 is a countersunk hole. The countersunk hole does not penetrate the slider 310, which can effectively prevent dust, debris and other objects from entering the threaded hole. This avoids damage to the threads or jamming of the slider 310 due to foreign objects. At the same time, since the bottom of the countersunk hole is closed, when the slider 310 moves to the limit position along the screw part 220, the end of the screw part 220 will not extend out of the slider 310 and make hard contact with the sliding conductor 410. This avoids scratches or damage to the surface of the sliding conductor 410 due to hard contact.
[0041] In one possible implementation, such as Figure 2 As shown, the support part 210 is provided with a milled flat part 230 at one end near the screw part 220; and the milled flat part 230 is located between the base 110 and the screw part 220. The milled flat part 230 is suitable for providing a stable contact surface for the open-end wrench. By setting the milled flat part 230, the operator can use the open-end wrench to easily rotate the connecting rod 200, thereby achieving precise adjustment of the slider 310 and improving the convenience of operation.
[0042] Furthermore, the milled flat portion 230, the support portion 210, and the screw portion 220 are integrally molded, and this integral molding design ensures the strength and stability of the overall structure of the connecting rod 200.
[0043] In one possible implementation, the support assembly further includes two thrust ball bearings 140; a protrusion 240 is provided around the outer wall of the support portion 210; both thrust ball bearings 140 are disposed within the cavity of the base 110 and are located on either side of the protrusion 240. It should be noted that by providing the protrusion 240 around the outer wall of the support portion 210 and placing the two thrust ball bearings 140 on either side of the protrusion 240, when the support portion 210 rotates, the rolling friction of the thrust ball bearings 140 replaces the sliding friction between the support portion 210 and the cavity of the base 110, effectively reducing friction and wear between the support portion 210 and the base 110, making the rotation of the support portion 210 smoother and extending the service life of the locking device.
[0044] Furthermore, the thrust ball bearing 140 adopts the existing technology bearing model 51103GB301-1995.
[0045] In one possible implementation, a screw 130 is also included; the screw 130 passes through the cover plate 120 and is fixedly connected to the base 110; by screwing the screw 130 through the cover plate 120 into the base 110, the cover plate 120 and the base 110 form a stable whole; thereby ensuring that the cover plate 120 will not easily detach from the base 110 during the use of the locking device, preventing components such as the connecting rod 200 and the thrust ball bearing 140 in the cavity of the base 110 from falling out of the cavity of the base 110, and ensuring the sealing and stability of the internal structure of the cavity of the base 110.
[0046] Furthermore, screw 130 adopts the existing technology of M4 screw 130.
[0047] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A locking device for testing the position indication of a disconnecting switch, suitable for installation between a sliding conductor and a grounding contact; characterized in that, include: Support components, connecting rods, and sliders; The support assembly includes a base and a cover plate; the base has a cavity with an opening on one side, the cover plate is disposed at the opening of the base, and one end of the connecting rod passes through the cover plate and is rotatably disposed within the cavity of the base. The slider is disposed at the end of the connecting rod away from the base, and the slider can move along the axial direction of the connecting rod so that when the connecting rod rotates, it drives the slider to abut against the sliding conductor; A locking mechanism is installed on the connecting rod. The locking mechanism moves along the axial direction of the connecting rod and is adapted to move to the side of the slider away from the sliding conductor and abut against the slider to lock the slider when the slider abuts against the sliding conductor.
2. The locking device for testing the position indication of a disconnecting switch according to claim 1, characterized in that, The locking mechanism is a locking nut; The connecting rod is provided with external threads, and the locking nut is sleeved on the connecting rod and threadedly connected to the connecting rod.
3. The locking device for testing the position indication of a disconnecting switch according to claim 2, characterized in that, The connecting rod includes: a support part and a screw part; The support portion is rotatably disposed within the cavity of the base, and one end of the support portion extends out of the base and is connected to the screw portion. The slider has a threaded hole, and the slider is threadedly connected to the end of the screw part that is away from the support part.
4. The locking device for testing the position indication of a disconnecting switch according to claim 3, characterized in that, The support assembly also includes two thrust ball bearings; The outer wall of the support is provided with a protrusion; the two thrust ball bearings are both disposed in the cavity of the base and are located on both sides of the protrusion.
5. The locking device for testing the position indication of a disconnecting switch according to claim 3, characterized in that, The support portion is provided with a milled flat portion at one end near the screw portion; Furthermore, the milled flat portion is located between the base and the screw portion.
6. The locking device for testing the position indication of a disconnector switch according to claim 1, characterized in that, It also includes screws; The screw passes through the cover plate and is fixedly connected to the base.