Three-station isolating switch capable of intelligently adjusting grounding and closing synchronization

Abstract

The utility model relates to a three-station isolating switch capable of intelligently adjusting grounding and closing synchronization, which comprises a three-station isolating switch and a controller, the three-station isolating switch is provided with a grounding beam, the grounding beam is respectively provided with a group of lifting type grounding contact assemblies corresponding to three-station isolating knife switches, each lifting type grounding contact assembly comprises an insulating fixed support, and the insulating fixed support is provided with a plurality of lifting type grounding contact assemblies. Lifting driving mechanisms are installed at the bottom of the insulating fixing support, the top output ends of the lifting driving mechanisms are connected with insulating parts, the tops of the insulating parts are connected with supporting shafts, grounding contacts are installed at the top ends of the supporting shafts, and all the lifting driving mechanisms are in signal connection with the controller. Displacement sensors are arranged on the rack of the three-position isolating switch corresponding to each group of lifting type grounding contact assemblies, the displacement sensors are used for detecting the height of the corresponding contacts, and all the displacement sensors are in signal connection with the controller; according to the utility model, the adjusting efficiency and precision are obviously improved, rapid and accurate adjustment of grounding closing synchronization is realized, the adjusting time is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of three-position disconnect switch technology, specifically a three-position disconnect switch with intelligent adjustable grounding switch contract period. Background Technology

[0002] In power systems, three-position disconnect switches are indispensable equipment in transmission and distribution lines, used to achieve circuit isolation, grounding, and connection functions. The grounding synchronization period refers to the synchronicity of the three positions during grounding operations; it is a crucial indicator of the disconnect switch's performance, directly affecting the reliability and safety of grounding operations. Traditional three-position disconnect switches typically require manual adjustment of the grounding contact height when adjusting the grounding synchronization period. This process is cumbersome, lacks precision, is inefficient, and carries the risk of misoperation. Therefore, there is an urgent need for a three-position disconnect switch that simplifies the adjustment process and improves adjustment accuracy. Utility Model Content

[0003] The main purpose of this utility model is to solve the problems existing in the prior art and provide a three-position disconnect switch with intelligent adjustable grounding contract period.

[0004] The specific solution of this utility model is as follows: a three-position disconnect switch with intelligent adjustable grounding contact period, including a three-position disconnect switch and a controller. The three-position disconnect switch is provided with a grounding beam. On the grounding beam, a set of lifting grounding contact assemblies is provided for each of the three disconnecting switches corresponding to the three positions. The lifting grounding contact assembly includes an insulating fixing bracket. A lifting drive mechanism is installed at the bottom of the insulating fixing bracket. An insulating component is connected to the top output end of the lifting drive mechanism. A support shaft is connected to the top of the insulating component. A grounding contact is installed at the top of the support shaft. Each set of lifting drive mechanisms is signal-connected to the controller. A displacement sensor is installed on the frame of the three-position disconnect switch corresponding to each set of lifting grounding contact assemblies. The displacement sensor is used to detect the height of the corresponding contact. All displacement sensors are signal-connected to the controller.

[0005] Furthermore, the insulating fixing bracket includes a top plate and a bottom plate, and several insulating support columns are fixedly connected between the top plate and the bottom plate.

[0006] Furthermore, the lifting drive mechanism described in this utility model provides the following two specific solutions: the first solution is to use a servo electric cylinder.

[0007] Option 2: The lifting drive mechanism includes a servo motor, the output shaft of which is fitted with a spline sleeve. The spline sleeve is rotatably connected to an insulating fixed bracket. A rotating shaft is slidably connected inside the spline sleeve and slides axially. An insulating component is mounted on the top of the rotating shaft. The support shaft is a screw, which is threadedly connected to the insulating fixed bracket. The grounding contact is fixedly connected to the top of the screw. An angle sensor is connected to the screw to detect the rotation angle of the screw.

[0008] Furthermore, the screw pitch is 0.2-1mm.

[0009] Furthermore, the insulating component is made of epoxy resin insulating pillar, and the bottom end of the support shaft is inserted into the epoxy resin insulating pillar.

[0010] This utility model also provides a method for adjusting the grounding termination period of a three-position disconnecting switch. Using the above-mentioned three-position disconnecting switch, the adjustment method includes the following steps:

[0011] S1. Connect the grounding contact system, controller, and mechanical characteristic tester of the disconnecting switch, start the controller and mechanical characteristic tester, and set the grounding contact preset value for the contract period.

[0012] S2, close the grounding switch, use a mechanical characteristic tester to test the grounding switch's contract parameters, and feed them back to the controller;

[0013] S3. The controller sends an adjustment command to the lifting drive mechanism based on the synchronous data obtained from the test, raising or lowering the height of the grounding contact. The displacement sensor detects the height position of the grounding contact in real time. When the adjusted height is reached, the controller stops the lifting drive mechanism.

[0014] S4. The controller issues a command, and the mechanical characteristic tester retests whether the grounding switch contract period has reached the preset value. If it has not reached the preset value, the S3 step is repeated until the preset value is reached.

[0015] Compared with the prior art, this utility model has the following advantages: 1. Significantly improves adjustment efficiency and accuracy: By using the lifting drive mechanism and the sensor and controller together, the grounding switch can be adjusted quickly and accurately, which greatly shortens the adjustment time and improves work efficiency.

[0016] 2. Enhanced operational safety and reliability: Intelligent management and fault diagnosis functions can monitor in real time whether the equipment is in a grounded or closed state, so as to ensure safe maintenance.

[0017] 3. Reduced maintenance costs: The compact and easy-to-maintain design makes daily maintenance and troubleshooting simpler and more convenient, reducing maintenance costs.

[0018] 4. Adapting to the development trend of smart grids: This utility model integrates intelligent monitoring and automatic control systems, which meet the requirements of smart grids for intelligent and automated management of equipment, and provides strong support for the intelligent upgrading of power systems. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0020] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the grounding closed state;

[0021] Figure 3 This is a perspective view of the second scheme of the lifting drive mechanism of this utility model;

[0022] Figure 4 yes Figure 3 A partial sectional view;

[0023] Figure 5 This is a perspective view of the first scheme of the lifting drive mechanism of this utility model;

[0024] In the diagram: 1. Grounding beam; 2. Lifting drive mechanism; 3. Insulating fixing bracket; 21. Servo motor; 22. Spline sleeve; 23. Rotating shaft; 24. Insulating component; 25. Screw; 26. Grounding contact; 27. Servo electric cylinder; 28. Connecting rod; 31. Top plate; 32. Insulating support column; 33. Base plate. Detailed Implementation

[0025] See Example 1 Figure 1 , Figure 2 , Figure 5 This embodiment is a three-position disconnect switch with intelligent adjustable grounding switch contract period, including a three-position disconnect switch and a controller. The three-position disconnect switch is provided with a grounding beam 1. On the grounding beam 1, a set of lifting grounding contact 26 assemblies are provided for each of the three disconnecting switches. The lifting grounding contact 26 assembly includes an insulating fixing bracket 3. The bottom of the insulating fixing bracket 3 is equipped with a lifting drive mechanism 2. The top output end of the lifting drive mechanism 2 is connected to an insulating component 24. The top of the insulating component 24 is connected to a support shaft. The top of the support shaft is equipped with a grounding contact 26. Each set of lifting drive mechanisms 2 is signal-connected to the controller. The frame of the three-position disconnect switch is equipped with a displacement sensor corresponding to each set of lifting grounding contact 26 assemblies. The displacement sensor is used to detect the height of the corresponding contact. All displacement sensors are signal-connected to the controller.

[0026] Furthermore, the insulating fixing bracket 3 includes a top plate 31 and a bottom plate 33, with a plurality of insulating support columns 32 fixedly connected between the top plate 31 and the bottom plate 33, and the top plate 31 is fixedly connected to the bottom surface of the grounding beam 1.

[0027] Furthermore, the lifting drive mechanism 2 of this utility model adopts a servo electric cylinder 27. The output end push rod of the servo electric cylinder 27 faces upward, the push rod passes through the bottom plate 33 and is slidably connected to the bottom plate 33, the top end of the push rod is equipped with an insulating part 24, the top end of the insulating part 24 is inserted with a connecting rod 28, the top end of the connecting rod 28 passes through the top plate 31 upward and is equipped with a grounding contact 26, and the connecting rod 28 is slidably connected to the top plate 31.

[0028] Furthermore, the insulating component 24 is made of epoxy resin insulating support column 32, and the bottom end of the support shaft is inserted into the epoxy resin insulating support column 32.

[0029] This embodiment also provides a method for adjusting the grounding contract period of a three-position disconnecting switch. Using the above-mentioned three-position disconnecting switch, the adjustment method includes the following steps: S1, connect the grounding contact 26 system of the disconnecting switch, the controller, and the mechanical characteristic tester, start the controller and the mechanical characteristic tester, and set the preset value of the grounding contract period; S2, close the grounding switch, the mechanical characteristic tester tests the grounding contract period parameters, and feeds back to the controller; S3, the controller issues an adjustment command to the lifting drive mechanism 2 based on the measured contract period data, raising or lowering the height of the grounding contact 26. The displacement sensor detects the height position of the grounding contact 26 in real time. When the adjusted height is reached, the controller stops the lifting drive mechanism 2; S4, the controller issues a command, and the mechanical characteristic tester retests whether the grounding contract period has reached the preset value. If it has not reached the preset value, repeat step S3 until the preset value is reached.

[0030] This invention adjusts the height of the grounding contact 26 at the corresponding workstation according to the actual measurement, so that the grounding closing of the three workstations is synchronized, that is, the grounding closing time parameters reach the set value range.

[0031] See Example 2 Figure 3 , Figure 4 This embodiment is basically the same in structure as Embodiment 1, except that the lifting drive mechanism 2 includes a servo motor 21, the output shaft of which is fitted with a spline sleeve 22. The spline sleeve 22 is rotatably connected to the insulating fixing bracket 3. A rotating shaft 23 is slidably connected inside the spline sleeve 22, and the rotating shaft 23 slides axially. An insulating component 24 is mounted on the top end of the rotating shaft 23. The support shaft is a screw 25, which is threadedly connected to the top plate 31. The grounding contact 26 is fixedly connected to the top end of the screw 25. An angle sensor is connected to the screw 25 to detect the rotation angle of the screw 25. The inner wall of the spline sleeve 22 is provided with a key arranged axially, and the outer wall of the rotating shaft 23 is provided with a keyway that matches the key. The length of the keyway and the key exceeds the maximum adjustment stroke. Furthermore, the thread pitch of the screw 25 is 0.2-1mm.

[0032] The working principle of the lifting drive mechanism 2 in this embodiment is as follows: When the controller sends a signal to the servo motor 21, the angle sensor detects the signal in real time and provides feedback to the controller. The controller controls the servo motor 21 to rotate at an integer multiple of 180°, thereby ensuring that the direction of the grounding contact 26 does not change. During the adjustment process, the servo motor 21 drives the spline sleeve 22 to rotate. The spline sleeve 22 transmits torque to the rotating shaft 23 through a key. The rotating shaft 23 then transmits torque to the screw 25. Since the screw 25 is threadedly connected to the top plate 31, and the top plate 31 is fixed, the screw 25 will move up and down axially, simultaneously driving the rotating shaft 23 to move up and down axially as well. The grounding contact 26 at the top of the screw 25 is adjusted in height along with the screw 25.

Claims

1. A three-position disconnect switch with intelligent adjustable grounding and contract period, characterized by: The device includes a three-position disconnect switch and a controller. The three-position disconnect switch is equipped with a grounding beam. On the grounding beam, a set of lifting grounding contact assemblies is provided for each of the three disconnecting switches. Each lifting grounding contact assembly includes an insulating fixing bracket. A lifting drive mechanism is installed at the bottom of the insulating fixing bracket. An insulating component is connected to the top output end of the lifting drive mechanism. A support shaft is connected to the top of the insulating component. A grounding contact is installed at the top of the support shaft. Each set of lifting drive mechanisms is signal-connected to the controller. A displacement sensor is installed on the frame of the three-position disconnect switch for each set of lifting grounding contact assemblies. The displacement sensor is used to detect the height of the corresponding contact. All displacement sensors are signal-connected to the controller.

2. The three-position disconnect switch with intelligent adjustable grounding contract period as described in claim 1, characterized in that: The insulating fixing bracket includes a top plate and a bottom plate, and several insulating support columns are fixedly connected between the top plate and the bottom plate.

3. The three-position disconnect switch with intelligent adjustable grounding contract period as described in claim 1, characterized in that: The lifting drive mechanism uses a servo electric cylinder.

4. The three-position disconnect switch with intelligent adjustable grounding contract period as described in claim 1, characterized in that: The lifting drive mechanism includes a servo motor, the output shaft of which is fitted with a spline sleeve. The spline sleeve is rotatably connected to an insulating fixed bracket. A rotating shaft is slidably connected inside the spline sleeve and slides axially. An insulating component is mounted on the top of the rotating shaft. The support shaft is a screw, which is threadedly connected to the insulating fixed bracket. The grounding contact is fixedly connected to the top of the screw. An angle sensor is connected to the screw, and the angle sensor is used to detect the rotation angle of the screw.

5. The three-position disconnect switch with intelligent adjustable grounding contract period as described in claim 4, characterized in that: The screw thread pitch is 0.2-1mm.

6. The three-position disconnect switch with intelligent adjustable grounding contract period as described in claim 1, characterized in that: The insulating component is made of epoxy resin insulating support, and the bottom end of the support shaft is inserted into the epoxy resin insulating support.

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