A three-phase high-voltage power supply and its maintenance method

Abstract

This application discloses a three-phase high-voltage power supply, including an oil tank, a control box, an inverter box, a distribution box, a base, and a housing. The control box contains a sliding assembly that allows a clamping plate to switch between a first state and a second state. The clamping plate has inserts that engage with a first socket in the first state and a second socket in the second state. A drive assembly is installed on the inner wall of the control box. When the box door is opened, the drive assembly drives the sliding assembly to switch the clamping plate from the first state to the second state, allowing the clamping plate to extend horizontally, providing more space for maintenance personnel to clean internal dust or replace spare parts. Two sockets are provided internally to prevent damage to the wires due to frequent movement when the clamping plate switches between the first and second states. If the fault is caused by damage to the first socket and no spare part is available, the positions of the first and second sockets can be swapped to allow the clamping plate to function normally.

Description

Technical Field

[0001] This application relates to three-phase high-voltage power supplies, and more particularly to a three-phase high-voltage power supply and a maintenance method thereof. Background Technology

[0002] High-frequency high-voltage rectifier power supplies (referred to as high-voltage power supplies) are a new generation of power supply devices for electrostatic precipitators. They can be widely used in flue gas and dust control in industries such as power, metallurgy, chemical, and cement, and can achieve efficient dust removal and environmental protection.

[0003] High-voltage power supplies are often installed at the top of dust removal systems and are exposed to wind and sun year-round. If a high-voltage power supply malfunctions, it is necessary to troubleshoot and repair it in a timely manner to avoid greater economic losses. For example, the utility model patent with application number CN201921734731.3 discloses a high-frequency high-voltage power supply for electrostatic precipitators that is easy to maintain. Its electronic components are all fixed inside the box. Maintenance personnel need to reach into the box to check each electronic component. However, the space inside the box is small, making movement inconvenient and maintenance troublesome. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a three-phase high-voltage power supply and maintenance method, which can effectively solve the above-mentioned problems.

[0005] The technical solution adopted by this application to solve its technical problem is: A three-phase high-voltage power supply includes an oil tank, a control box, an inverter box, a distribution box, a base, and a housing. The control box contains a sliding assembly that allows a clamping plate to switch between a first state and a second state. The clamping plate has inserts that engage with a first socket in the first state and a second socket in the second state. The inner wall of the control box is fitted with a drive assembly. When the box door is opened, the drive assembly drives the sliding assembly to switch the clamping plate from the first state to the second state.

[0006] In the above technical solution, the sliding assembly further includes a lead screw, a slider, a timing wheel, and a support rod. The slider is slidably mounted on the lead screw, and the clamping plate is hinged to the slider. The timing wheel is mounted at the end of the lead screw and connected by a timing belt. A support rod is rotatably mounted inside the control box, and the other end of the support rod is hinged to the clamping plate.

[0007] The above technical solution further includes a first drive wheel that engages with the synchronous belt for transmission. The first drive wheel is located at one end of the transmission shaft, and a second drive wheel is located at the other end of the transmission shaft and connected to the drive assembly.

[0008] In the above technical solution, the second drive wheel drives the first drive wheel to rotate, the first drive wheel drives the synchronous wheel to rotate via a synchronous belt, and the synchronous wheel drives the lead screw to rotate, causing the sliding plate to slide downwards, thereby switching the clamping plate from the first state to the second state.

[0009] In the above technical solution, the drive assembly further includes a cam, a rocker arm, and a push rod. The push rod slides along the depth direction of the control box and is connected to the control box through an elastic component. One end of the rocker arm is hinged to the push rod, and the other end is hinged to the positioning protrusion of the cam. The cam is connected to the second drive wheel through a synchronous belt.

[0010] In the above technical solution, when the box door is opened, the top rod extends outward under the action of the elastic component and supports the box door. The connecting rod drives the cam to rotate under the action of the top rod. The cam drives the drive assembly to flip the clamp from the first state to the second state.

[0011] In the above technical solution, the sliding block is further slidably mounted on the control box, and the sliding block has a sliding protrusion that cooperates with the sliding groove of the control box. When the sliding block is placed at the front end of the top rod, the top rod cannot extend so that the clamping plate will not automatically flip when the box door is opened; when the sliding block leaves the front end of the top rod, the top rod can extend so that the clamping plate automatically flips when the box door is opened.

[0012] In the above technical solution, the distribution box is further equipped with a transformer to reduce the 380V input voltage to a 220V output voltage, which is then converted to 24V by the switching power supply in the control box to power the electronic components in the control box. The box door is connected to the control box by a gas spring so that it can be suspended at any angle.

[0013] A method for overhauling a three-phase high-voltage power supply includes the following steps: Step 1: Move the sliding block to the front end of the top rod, open the box door, and observe the power supply status; Step 2: If the switching power supply has power, check the electronic components in the control box for faults according to the controller's prompts. Step 3: If the switching power supply is not working, close the door and move the sliding block away. Step 4: Open the cabinet door again. The clamp will switch from the first state to the second state simultaneously. Observe the power supply status. Step 5: If the switching power supply has power, it means that the first socket is damaged and should be replaced. Step 6: If the switching power supply has no power, it indicates a fault in the distribution box. Check the distribution box. The beneficial effects of this application are: 1. The clamp can be extended flat, giving maintenance personnel more space to clean internal dust or replace spare parts; 2. Two sockets are provided inside, so that the wires will not be damaged due to frequent movement when the clamp switches between the first and second states; 3. If the fault is caused by damage to the first socket and there is no spare part available, the positions of the first and second sockets can be swapped to enable it to work normally. Attached Figure Description

[0014] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a structural schematic diagram of the elevation of this application.

[0016] Figure 2 This is a top view of the structure of this application.

[0017] Figure 3 This is a structural schematic diagram of the second state of the clamping plate of the control box in this application.

[0018] Figure 4 This application is Figure 3 A schematic diagram of the internal structure.

[0019] Figure 5 This is a schematic diagram of the first state of the clamping plate of the control box in this application.

[0020] Figure 6 This application is Figure 5 A schematic diagram of the internal structure.

[0021] Figure 7 This application is Figure 6 A partially enlarged schematic diagram of section AA.

[0022] Figure 8 This is a schematic diagram of the sliding block of this application.

[0023] Figure 9 This is a structural diagram of the back of the clamping plate of this application.

[0024] Figure 10 This is a flowchart of the maintenance method described in this application.

[0025] In the diagram, 1. Oil tank, 2. Control box, 21. Clamping plate, 211. Insert, 22. First socket, 23. Second socket, 24. Box door, 25. Sliding groove, 26. Gas spring, 27. Controller, 28. Switching power supply, 3. Inverter box, 4. Distribution box, 5. Base, 6. Housing, 7. Sliding assembly, 71. Lead screw, 72. Slider, 73. Synchronous pulley, 74. Support rod, 75. Synchronous belt, 76. First drive wheel, 77. Second drive wheel, 78. Transmission shaft, 8. Drive assembly, 81. Cam, 811. Positioning protrusion, 82. Rocker arm, 83. Top rod, 84. Elastic component, 9. Sliding block, 91. Sliding protrusion. Detailed Implementation

[0026] Reference Figure 1-10 As shown, a three-phase high-voltage power supply includes an oil tank 1, a control box 2, an inverter box 3, a distribution box 4, a base 5, and a housing 6. The control box 2 is characterized by a sliding assembly 7 that allows a clamping plate 21 to switch between a first state and a second state. The clamping plate 21 is provided with inserts 211 that engage with a first socket 22 in the first state and with a second socket 23 in the second state. A drive assembly 8 is installed on the inner wall of the control box 2. When the box door 24 is opened, the drive assembly 8 drives the sliding assembly 7 to switch the clamping plate 21 from the first state to the second state.

[0027] To allow the clamping plate 21 to extend from the control box 2 and remain horizontal, the sliding assembly 7 includes a lead screw 71, a slider 72, a timing pulley 73, and a support rod 74. The slider 72 is slidably mounted on the lead screw 71, and the clamping plate 21 is hinged to the slider 72. The timing pulley 73 is located at the end of the lead screw 71 and connected via a timing belt 75. The support rod 74 is rotatably mounted inside the control box 2, and its other end is hinged to the clamping plate 21. The assembly also includes a first drive wheel 76 that engages with the timing belt 75 for transmission. The first drive wheel 76 is located at one end of a transmission shaft 78, and a second drive wheel 77 is located at the other end of the transmission shaft 78 and connected to the drive assembly 8. The second drive wheel 77 drives the first drive wheel 76 to rotate, and the first drive wheel 76 drives the timing pulley 73 to rotate via the timing belt 75. The timing pulley 73 drives the lead screw 71 to rotate, causing the slider to slide downwards, thus switching the clamping plate 21 from a first state to a second state.

[0028] To enable the clamping plate 21 to automatically flip while the box door 24 is opened, a drive assembly 8 is provided. The drive assembly 8 includes a cam 81, a rocker arm 82, and a push rod 83. The push rod 83 slides along the depth direction of the control box 2 and is connected to the control box 2 through an elastic member 84. One end of the rocker arm 82 is hinged to the push rod 83, and the other end is hinged to the positioning protrusion 811 of the cam 81. The cam 81 is connected to the second drive wheel 77 through a synchronous belt 75. When the box door 24 is opened, the push rod 83 extends outward under the action of the elastic member 84 and supports the box door 24. The connecting rod drives the cam 81 to rotate under the action of the push rod 83. The cam 81 drives the drive assembly 8 to flip the clamping plate 21 from the first state to the second state.

[0029] To accommodate situations where only the control box 2 needs to be opened for observation and the clamping plate 21 does not need to be unfolded, a sliding block 9 is provided. The sliding block 9 is slidably mounted on the control box 2. The sliding block 9 has a sliding protrusion 91 that engages with the sliding groove 25 of the control box 2. When the sliding block 9 is positioned at the front end of the top rod 83, the top rod 83 cannot extend, preventing the clamping plate 21 from automatically flipping when the box door 24 is opened. When the sliding block 9 moves away from the front end of the top rod 83, the top rod 83 can extend, allowing the clamping plate 21 to automatically flip when the box door 24 is opened.

[0030] The distribution box 4 is equipped with a transformer that reduces the 380V input voltage to a 220V output voltage, which is then converted to 24V by the switching power supply in the control box 2 to power the electronic components in the control box 2. The box door 24 is connected to the control box 2 by a gas spring 26, allowing it to be suspended at any angle.

[0031] To prevent damage to the connecting wires due to tensile or shearing forces caused by the movement of the clamp 21 inside the control box 2, a first socket 22 and a second socket 23 are provided inside the control box 2, i.e., inside the clamp 21. The power distribution box 4's incoming line is connected to the first socket 22 and the second socket 23, and the first socket 22 and the second socket 23 are arranged in parallel. A plug 211 is provided on the clamp 21 to cooperate with and connect to the first socket 22 and the second socket 23. The plug 211 is connected to the switching power supply through a wire, and the switching power supply then supplies power to the electronic components inside the control box 2.

[0032] When maintenance personnel regularly perform maintenance and inspection on high-voltage power supplies, they often clean the inside of the control box and replace old wires and electronic components. If the clamp is in the first position, it can only be fixed inside the box, and the dust cleaned will often fall inside the box. However, when the clamp is in the second position, the dust can be swept directly to the bottom. At the same time, when replacing wires and electronic components, there is more room for hand movement, which is more convenient.

[0033] The troubleshooting method for a three-phase high-voltage power supply includes the following steps: Step 1: Move the sliding block 9 to the front end of the top rod 83, open the box door 24, and observe the power supply status; Step 2: If the switching power supply has power, check the electronic components in control box 2 one by one according to the prompts of the controller to see if they are faulty. Step 3: If the switching power supply is not working, close the door 24 and move the sliding block 9 away at the same time; Step 4: Open the door 24 again, and the clamp 21 will switch from the first state to the second state simultaneously. Observe the power supply status. Step 5: If the switching power supply has power, it means that the first socket 22 is damaged. Replace the first socket 22. Step 6: If the switching power supply has no power, it indicates that the distribution box 4 is faulty. Check the distribution box 4.

[0034] This section only describes the maintenance methods related to the structure in this application; other problems caused by malfunctions will not be discussed in detail here.

[0035] Based on the above design, the following functions are achieved: the clamp can be extended flat, giving maintenance personnel more space to clean internal dust or replace spare parts; two sockets are installed inside, so that the wires will not be damaged due to frequent movement when the clamp switches between the first and second states; if the fault is caused by damage to the first socket and there is no spare part available, the positions of the first and second sockets can be swapped to enable it to work normally.

[0036] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any simple modifications, equivalent changes, or alterations made without departing from the technical solution of this application shall fall within the protection scope of this application.

Claims

1. A three-phase high-voltage power supply, comprising an oil tank, a control box, an inverter box, a distribution box, a base, and a housing, characterized in that, The control box is equipped with a sliding component, which allows the clamp to switch between a first state and a second state. The clamp is equipped with inserts that engage with a first socket in the first state and with a second socket in the second state. The inner wall of the control box is equipped with a drive component. When the box door is opened, the drive component drives the sliding component to switch the clamp from the first state to the second state. The sliding assembly includes a lead screw, a slider, a timing pulley, and a support rod. The slider is slidably mounted on the lead screw, and the clamping plate is hinged to the slider. The timing pulley is located at the end of the lead screw and connected by a timing belt. A support rod is rotatably mounted inside the control box, and the other end of the support rod is hinged to the clamping plate. The three-phase high-voltage power supply also includes a first drive wheel, which is driven by the synchronous belt. The first drive wheel is located at one end of the drive shaft, and a second drive wheel is located at the other end of the drive shaft and connected to the drive assembly. The second drive wheel drives the first drive wheel to rotate, and the first drive wheel drives the synchronous wheel to rotate via a synchronous belt. The synchronous wheel drives the lead screw to rotate, causing the slide to slide downwards, thus switching the clamp from the first state to the second state. The drive assembly includes a cam, a rocker arm, and a push rod. The push rod slides along the depth direction of the control box and is connected to the control box through an elastic component. One end of the rocker arm is hinged to the push rod, and the other end is hinged to the positioning protrusion of the cam. The cam is connected to the second drive wheel through a synchronous belt. When the box door is opened, the top rod extends outward under the action of the elastic component and supports the box door. The connecting rod drives the cam to rotate under the action of the top rod. The cam drives the drive assembly to flip the clamp from the first state to the second state. A sliding block is slidably mounted on the control box. The sliding block has a sliding protrusion that engages with the sliding groove of the control box. When the sliding block is positioned at the front end of the top rod, the top rod cannot extend, preventing the clamping plate from automatically flipping when the box door is opened. When the sliding block leaves the front end of the top rod, the top rod extends, causing the clamping plate to automatically flip when the box door is opened.

2. A three-phase high-voltage power supply according to claim 1, characterized in that, The distribution box is equipped with a transformer that reduces the 380V input voltage to a 220V output voltage. The output voltage is then converted to 24V by a switching power supply in the control box to power the electronic components inside the control box. The box door is connected to the control box by a gas spring, allowing it to be suspended at any angle.

3. A method for overhauling a three-phase high-voltage power supply, used for overhauling the three-phase high-voltage power supply as described in any one of claims 1-2, characterized in that, Includes the following steps: Step 1: Move the sliding block to the front end of the top rod, open the box door, and observe the power supply status; Step 2: If the switching power supply has power, check the electronic components in the control box for faults according to the controller's prompts. Step 3: If the switching power supply is not working, close the door and move the sliding block away. Step 4: Open the cabinet door again. The clamp will switch from the first state to the second state simultaneously. Observe the power supply status. Step 5: If the switching power supply has power, it means that the first socket is damaged and should be replaced. Step 6: If the switching power supply has no power, it indicates a fault in the distribution box. Check the distribution box.

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