A high-voltage solid-state soft-starter device integrating multiple filter units

Abstract

The application discloses a high-voltage solid-state soft starting device integrated with multiple filter units and relates to the field of high-voltage solid-state soft starting devices.The high-voltage solid-state soft starting device integrated with multiple filter units comprises a box body and a box door, the box door is rotationally connected to the box body, heat dissipation mechanisms are symmetrically fixed to the left and right of the box body, a self-locking mechanism is installed in the box body, the self-locking mechanism comprises a supporting plate, an insulating cover, a vertical rod, a connecting rod, a fixing frame, a threaded rod, a gear, a rack, a fixing block and a driving rod, the supporting plate is arranged in the box body, a motor soft starting device is nestedly arranged on the supporting plate, and the motor soft starting device is provided with the insulating cover on the side. The high-voltage solid-state soft starting device integrated with multiple filter units adopts a door-unlocking and door-self-locking mechanism, can realize the limiting and fixing of the motor soft starting device, is more convenient and simple to disassemble, maintain and assemble compared with the traditional bolt fixing, and can reduce the electromagnetic interference between the motor soft starting devices and guarantee the stable operation of the device in cooperation with the insulating cover.

Description

Technical Field

[0001] This invention relates to the field of high-voltage solid-state soft starter technology, specifically a high-voltage solid-state soft starter integrating multiple filtering units. Background Technology

[0002] Motor soft starters are advanced soft-start devices designed and manufactured using power electronics technology, microprocessor technology, and modern control theory. They effectively limit the starting current of AC motors and can be widely used in loads such as fans, pumps, and compressors. They are an ideal replacement for traditional star / delta converters, autotransformers, and magnetic control soft starters.

[0003] High-voltage solid-state soft starters achieve smooth starting of motors and mechanical loads by employing technologies such as voltage reduction or frequency conversion, thereby reducing starting current. Conventional high-voltage solid-state soft starters use semi-controlled thyristors and an AC-AC voltage regulation method; their output voltage can be adjusted, but the frequency cannot. The starting output torque is relatively small, but the starting current is relatively large, making them suitable for medium to light loads.

[0004] The fully controlled intelligent high-voltage solid-state soft starter uses fully controlled power semiconductor devices (IGBTs), employing AC-DC-AC voltage and frequency regulation, and a series connection of PWM inverters to superimpose high voltage output, achieving variable frequency and voltage high-voltage output to supply the motor with a variable frequency and voltage power supply. It generally consists of four parts: a phase-shifting transformer, a power unit, a main control unit, and input / output components. During motor starting, by gradually increasing the voltage and frequency, the starting current of the motor is kept at a low level while ensuring sufficient starting torque, thereby reducing the impact on the power grid.

[0005] In practical use, existing high-voltage solid-state soft starters are mainly installed and fixed with bolts. However, when maintenance and testing are required, disassembly and assembly are quite troublesome. If the soft starter is not disassembled, maintenance and testing are difficult to perform in a confined space. Therefore, to address the above problems, a high-voltage solid-state soft starter integrating multiple filtering units is designed to better meet practical needs. Summary of the Invention

[0006] The purpose of this invention is to provide a high-voltage solid-state soft starter device integrating multiple filtering units to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage solid-state soft starter device integrating multiple filtering units, comprising a housing and a door, wherein the door is rotatably connected to the housing, and heat dissipation mechanisms are symmetrically fixed on the housing. A self-locking mechanism is installed inside the housing, the self-locking mechanism comprising a support plate, an insulating cover, a vertical rod, a connecting rod, a fixing frame, a threaded rod, a gear, a rack, a fixing block, and a drive rod. The support plate is disposed inside the housing, and a motor soft starter device is nested on the support plate. An insulating cover is disposed on the side of the motor soft starter device. Vertical rods are symmetrically fixed at the lower end of the insulating cover, and the vertical rods are slidably connected to the support plate. One end of the vertical rod is rotatably connected to the connecting rod, and the other end of the connecting rod is rotatably connected to the housing. A fixing frame is fixed to the lower end face of the support plate. The fixed frame is connected to the threaded rod via threads. The threaded rod is bearing-connected to the housing. A gear is fixed on the threaded rod, and the gear meshes with a rack. The rack is slidably connected to a fixed block on the housing. One end of the rack is connected to a drive rod, and the other end of the drive rod is rotatably connected to the door. The opening and closing of the door drives the drive rod, which in turn moves the rack. This movement, combined with the transmission between the rack and gear and the threaded connection between the threaded rod and the fixed frame, causes the support plate to move. This movement, combined with the transmission of the connecting rod, causes the insulating cover to move. When the door is open, the insulating cover separates from the motor soft starter, unlocking it. When the door is closed, the insulating cover and the motor soft starter engage to self-lock the motor soft starter.

[0008] Preferably, a horizontal plate is fixed inside the box, and an electrical control unit installed inside the box is provided above the horizontal plate. A fire extinguishing mechanism and a shielding mechanism are installed on the lower end face of the horizontal plate. Through the above structure, a basic guarantee can be provided for the normal operation of the device.

[0009] Preferably, the heat dissipation mechanism includes a mounting frame, a cooling fan, and a dust filter. The mounting frame is fixed to the housing, and a motor-driven cooling fan is mounted on the mounting frame. The cooling fan is also equipped with a dust filter. Through the above structure, the airflow inside and outside the housing can be accelerated to ensure the heat dissipation effect of the device. The dust filter can prevent external dust from entering the device.

[0010] Preferably, the fire extinguishing mechanism includes a carbon dioxide storage tank, a partition, an electrically controlled valve, a conduit, a first spring, a nozzle, and an inclined block. The carbon dioxide storage tank has partitions fixed symmetrically on both sides, and an electrically controlled valve is installed on the partition. A smoke sensor is installed on the outside of the carbon dioxide storage tank. The smoke sensor can detect fire alarms, and the electrically controlled valve can provide a basic guarantee for the activation of the fire extinguishing device.

[0011] Preferably, the carbon dioxide storage tank is symmetrically slidably connected with conduits, and a first spring is fixed between the conduits and the carbon dioxide storage tank. This structure provides a basic guarantee for the normal operation of the device.

[0012] Preferably, the conduit is also fixed with a nozzle located on the outside of the carbon dioxide storage tank, and the upper end of the conduit is also fixed with an inclined block located on the outside of the carbon dioxide storage tank. Through the action of the conduit and the nozzle, carbon dioxide can be sprayed out, providing a basic guarantee for fire extinguishing.

[0013] Preferably, the shielding mechanism includes a shield frame, a traction rope, a roller, a positioning ring, a movable frame, and a second spring. The shield frame and the mounting frame are slidably connected, and the shield frame contacts the lower outer protrusion of the mounting frame to achieve a limiting position. Through the function of the shield frame, the opening on the mounting frame can be shielded during the fire extinguishing process, which can keep the inside of the box in a relatively sealed state, so that the carbon dioxide concentration inside the box increases and the fire extinguishing effect is accelerated, and can also prevent flames from splashing out and causing the fire to spread.

[0014] Preferably, a traction rope is fixed on the baffle frame, and the traction rope is connected to the roller. The roller bearing is connected to the horizontal plate. The above structure can provide a basic guarantee for the fixation of the baffle frame.

[0015] Preferably, a positioning ring is fixed on the traction rope, and the positioning ring and the movable frame are nested together, and the movable frame and the cross plate are slidably connected. Through the nesting action between the positioning ring and the movable frame, the positioning and locking function of the baffle frame can be achieved.

[0016] Preferably, the movable frame and the inclined block can slide together, and a second spring is fixed between the movable frame and the horizontal plate. The sliding action between the movable frame and the inclined block can provide a basic force to release the locking of the retaining frame and ensure the normal operation of the device.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This high-voltage solid-state soft starter with integrated multiple filtering units adopts a door-opening unlocking and door-closing self-locking mechanism, which can realize the limit fixation of the motor soft starter. Compared with the traditional bolt fixing, it is more convenient and simple to disassemble and maintain. In addition, with the function of the insulating cover, it can reduce electromagnetic interference between motor soft starters and ensure the stable operation of the device. Specifically, the opening and closing of the box door can drive the drive rod to move. The drive rod causes the rack to move. With the transmission between the rack and gear and the threaded connection between the threaded rod and the fixed frame, the support plate moves. With the transmission of the connecting rod, the insulating cover moves. When the box door is opened, the insulating cover separates from the motor soft starter to unlock. When the box door is closed, the insulating cover cooperates with the motor soft starter to achieve self-locking of the motor soft starter.

[0019] 2. This high-voltage solid-state soft-start device, integrating multiple filtering units, employs an automatic fire extinguishing mechanism. It can automatically extinguish a fire inside the device. During the extinguishing process, in conjunction with a linked sealing mechanism, it prevents flames from splashing out and spreading the fire, while maintaining a relatively sealed environment inside the chamber. This allows the carbon dioxide concentration inside the chamber to rise rapidly under the action of the carbon dioxide storage tank and nozzles, ensuring effective fire extinguishing. Specifically, when the smoke sensor detects smoke, the electrically controlled valve opens, allowing carbon dioxide from the storage tank to be ejected through the conduit and nozzles. Under the pressure of the carbon dioxide, the conduit and nozzles are kept at a certain distance. Combined with the sliding action between the inclined block and the movable frame, the movable frame separates from the positioning ring, causing the baffle frame to automatically fall under gravity, effectively sealing the opening of the mounting frame. Attached Figure Description

[0020] Figure 1 This is a frontal three-dimensional structural diagram of the overall internal structure of the device of the present invention;

[0021] Figure 2 This is a frontal three-dimensional structural diagram of the device of the present invention;

[0022] Figure 3 This is a bottom-view three-dimensional structural diagram of the overall internal structure of the device of the present invention;

[0023] Figure 4 This is an exploded three-dimensional structural diagram of the self-locking mechanism and the motor soft-start device of the present invention;

[0024] Figure 5 This is a bottom-view perspective view of the self-locking mechanism of the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the fire extinguishing mechanism and the shielding mechanism of the present invention;

[0026] Figure 7 This is a partial enlarged three-dimensional structural diagram of the fire extinguishing mechanism and the shielding mechanism of the present invention.

[0027] In the diagram: 1. Box body; 101. Horizontal plate; 102. Electrical control unit; 2. Box door; 3. Heat dissipation mechanism; 301. Mounting frame; 302. Cooling fan; 303. Dustproof net; 4. Self-locking mechanism; 401. Support plate; 402. Insulating cover; 403. Vertical rod; 404. Connecting rod; 405. Fixing frame; 406. Threaded rod; 407. Gear; 408. Rack; 409. Fixing block; 410. Drive rod; 5. Motor soft starter; 6. Fire extinguishing mechanism; 601. Carbon dioxide storage tank; 602. Partition plate; 603. Electrically controlled valve; 604. Conduit; 605. First spring; 606. Nozzle; 607. Inclined block; 7. Shielding mechanism; 701. Baffle frame; 702. Traction rope; 703. Roller; 704. Positioning ring; 705. Movable frame; 706. Second spring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-7This invention provides a technical solution: a high-voltage solid-state soft starter device integrating multiple filtering units, including a housing 1 and a door 2. The door 2 is rotatably connected to the housing 1. A heat dissipation mechanism 3 is symmetrically fixed on the housing 1. A self-locking mechanism 4 is installed inside the housing 1. The self-locking mechanism 4 includes a support plate 401, an insulating cover 402, a vertical rod 403, a connecting rod 404, a fixing frame 405, a threaded rod 406, a gear 407, a rack 408, a fixing block 409, and a drive rod 410. The support plate 401 is disposed inside the housing 1. A motor soft starter 5 is nested on the support plate 401. An insulating cover 402 is disposed on the side of the motor soft starter 5. The lower end of the insulating cover 402 is symmetrically positioned front and rear. A vertical rod 403 is fixed, and the vertical rod 403 is slidably connected to the support plate 401. One end of the vertical rod 403 is rotatably connected to the connecting rod 404, and the other end of the connecting rod 404 is rotatably connected to the box 1. A fixing frame 405 is fixed on the lower end face of the support plate 401. The fixing frame 405 is connected to the threaded rod 406 by threads. The threaded rod 406 is connected to the box 1 by bearings. A gear 407 is fixed on the threaded rod 406. The gear 407 meshes with the rack 408. The rack 408 is slidably connected to the fixing block 409 fixed on the box 1. The rack 408 is connected to one end of the drive rod 410 by transmission. The other end of the drive rod 410 is rotatably connected to the box door 2.

[0030] A horizontal plate 101 is fixed inside the housing 1, and an electrical control unit 102 installed inside the housing 1 is provided above the horizontal plate 101. A fire extinguishing mechanism 6 and a shielding mechanism 7 are installed on the lower end face of the horizontal plate 101. The heat dissipation mechanism 3 includes a mounting frame 301, a heat dissipation fan 302 and a dustproof net 303. The mounting frame 301 is fixed on the housing 1, and a motor-driven heat dissipation fan 302 is installed on the mounting frame 301. A dustproof net 303 is also installed on the heat dissipation fan 302.

[0031] When using this high-voltage solid-state soft starter with integrated multiple filtering units, such as Figures 1-7As shown, first, the box door 2 is opened, and then the motor soft starter 5 is nested with the slotted plate 401 for positioning. After installation, by closing the box door 2, the rack 408 moves in conjunction with the transmission action of the drive rod 410. The sliding guide action between the rack 408 and the fixed block 409 ensures the stability of the rack 408's movement. The transmission action between the rack 408 and the gear 407 causes the threaded rod 406 to rotate. The threaded connection between the threaded rod 406 and the fixed frame 405 causes the fixed frame 405 and the plate 401 to move downward under force, thereby reducing the distance between the plate 401 and the lower end face of the box 1. The transmission action of the connecting rod 404 then causes the insulating cover to move downward. 402 moves, and when the box door 2 is closed, the insulating cover 402 cooperates with the motor soft starter 5 to achieve clamping and limiting, ensuring the stability of the motor soft starter 5. According to the above principle, when the box door 2 is opened, the insulating cover 402 can be separated from the motor soft starter 5, releasing the limiting of the motor soft starter 5, which facilitates the disassembly and assembly of the motor soft starter 5 and subsequent maintenance, effectively improving the maintenance efficiency of the motor soft starter 5. After the motor soft starter 5 is installed, during the use of the device, the cooling fan 302 can accelerate the airflow inside the box 1, ensuring the heat dissipation effect of the device. With the help of the dustproof net 303, it can block external dust and prevent external dust from entering the box 1.

[0032] The fire extinguishing mechanism 6 includes a carbon dioxide storage tank 601, a partition 602, an electrically controlled valve 603, a conduit 604, a first spring 605, a nozzle 606, and an inclined block 607. The partition 602 is symmetrically fixed inside the carbon dioxide storage tank 601, and the electrically controlled valve 603 is installed on the partition 602. A smoke sensor is installed on the outside of the carbon dioxide storage tank 601. The conduit 604 is symmetrically slidably connected to the carbon dioxide storage tank 601, and the first spring 605 is fixed between the conduit 604 and the carbon dioxide storage tank 601. A nozzle 606, located on the outside of the carbon dioxide storage tank 601, is also fixed on the conduit 604, and an inclined block 607, located on the outside of the carbon dioxide storage tank 601, is also fixed to the upper end of the conduit 604. The shielding mechanism 7 includes... The system includes a retaining frame 701, a traction rope 702, a roller 703, a positioning ring 704, a movable frame 705, and a second spring 706. The retaining frame 701 is slidably connected to the mounting frame 301, and the retaining frame 701 contacts the lower outer protrusion of the mounting frame 301 to achieve a limiting position. The traction rope 702 is fixed on the retaining frame 701, and the traction rope 702 is connected to the roller 703, with the roller 703 bearing connected to the horizontal plate 101. The positioning ring 704 is fixed on the traction rope 702, and the positioning ring 704 is nested with the movable frame 705, while the movable frame 705 is slidably connected to the horizontal plate 101. The movable frame 705 can slide in cooperation with the inclined block 607, and a second spring 706 is also fixed between the movable frame 705 and the horizontal plate 101.

[0033] During the device adaptation process, such as Figures 1-7As shown, when a fire occurs inside the housing 1 due to overload or short circuit, smoke detection is achieved by a smoke sensor installed on the outside of the carbon dioxide storage tank 601. When smoke is detected, the controller controls the electronically controlled valve 603 to open. At this time, the liquid carbon dioxide stored in the carbon dioxide storage tank 601 rapidly vaporizes. The vaporized carbon dioxide enters the nozzle 606 through the conduit 604 and is sprayed out to extinguish the fire. When the vaporized carbon dioxide is sprayed out, the conduit 604 and the nozzle 606 are displaced under the action of air pressure. At this time, the first spring 605 is compressed. When the nozzle 606 moves, it synchronously drives the inclined block 607 to move. With the sliding action between the inclined block 607 and the movable frame 705, the movable frame 705 moves upward, thereby causing the movable frame 705 to move upward. Separating from the positioning ring 704 releases the limiting effect of the baffle frame 701, allowing the baffle frame 701 to fall automatically under its own weight. Combined with the sliding action between the baffle frame 701 and the mounting frame 301, this ensures the stability of the baffle frame 701's movement until it contacts the lower outer protrusion of the mounting frame 301, achieving a limiting position. At this point, the baffle frame 701 effectively blocks the opening of the mounting frame 301, keeping the interior of the housing 1 relatively sealed. This prevents flames from splashing out and causing the fire to spread, and also prevents carbon dioxide from leaking out of the nozzle 606. This allows the carbon dioxide concentration inside the housing 1 to increase rapidly, thus ensuring the fire extinguishing effect of the device and greatly reducing economic losses caused by fire. This is the working principle of the high-voltage solid-state soft-start device with integrated multiple filtering units.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage solid-state soft-starter device integrated with multiple filter units, comprising a box (1) and a box door (2), the box door (2) is rotatably connected to the box (1), characterized in that: The box (1) is fixed with heat dissipation mechanism (3) on left and right symmetry, the self-locking mechanism (4) is installed in the box (1), the self-locking mechanism (4) includes the supporting plate (401), the insulating cover (402), the vertical rod (403), the connecting rod (404), the fixed frame (405), the threaded rod (406), the gear (407), the rack (408), the fixed block (409) and the drive rod (410), the supporting plate (401) is arranged in the box (1), the motor soft start device (5) is nestedly installed on the supporting plate (401), the motor soft start device (5) side is provided with the insulating cover (402), the insulating cover (402) lower end front and rear symmetry is fixed with the vertical rod (403), and the vertical rod (403) is slidably connected with the supporting plate (401), one end of the vertical rod (403) is rotatably connected with the connecting rod (404), the other end of the connecting rod (404) is rotatably connected in the box (1), the fixed frame (405) is fixed on the lower end surface of the supporting plate (401), the fixed frame (405) is connected with the threaded rod (406) by screw thread, the threaded rod (406) is connected in the box (1), the threaded rod (406) is fixed with the gear (407), the gear (407) is engaged with the rack (408), the rack (408) is slidably connected with the fixed block (409) fixed in the box (1), one end of the rack (408) is drivingly connected with the drive rod (410), the other end of the drive rod (410) is rotatably connected on the box door (2), the opening and closing of the box door (2) can drive the drive rod (410) to move, the rack (408) moves under the action of the drive rod (410), the transmission between the rack (408) and the gear (407) and the threaded connection between the threaded rod (406) and the fixed frame (405) make the supporting plate (401) move, and the transmission of the connecting rod (404) makes the insulating cover (402) move, so that the insulating cover (402) is separated from the motor soft start device (5) to realize unlocking when the box door (2) is opened, and the insulating cover (402) cooperates with the motor soft start device (5) to realize the self-locking of the motor soft start device (5) when the box door (2) is closed.

2. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 1 wherein: The box (1) is fixed with the horizontal plate (101), and the electric control unit (102) is arranged above the horizontal plate (101) and installed in the box (1), and the fire extinguishing mechanism (6) and the shielding mechanism (7) are installed on the lower end surface of the horizontal plate (101).

3. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 1 wherein: The heat dissipation mechanism (3) includes the mounting frame (301), the heat dissipation fan (302) and the dust screen (303), the mounting frame (301) is fixed on the box (1), and the heat dissipation fan (302) driven by the motor is installed on the mounting frame (301), and the dust screen (303) is further installed on the heat dissipation fan (302).

4. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 2 wherein: The fire extinguishing mechanism (6) comprises a carbon dioxide storage tank (601), a partition (602), an electric control valve (603), a conduit (604), a first spring (605), a spray head (606) and an inclined block (607), the partition (602) is fixed symmetrically left and right in the carbon dioxide storage tank (601), the electric control valve (603) is installed on the partition (602), and a smoke sensor is installed outside the carbon dioxide storage tank (601).

5. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 4 wherein: The conduit (604) is slidably connected to the carbon dioxide storage tank (601) symmetrically left and right, and the first spring (605) is fixed between the conduit (604) and the carbon dioxide storage tank (601).

6. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 4 wherein: The spray head (606) is further fixed on the conduit (604) and arranged outside the carbon dioxide storage tank (601), and the inclined block (607) is further fixed on the upper end of the conduit (604) and arranged outside the carbon dioxide storage tank (601).

7. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 2 wherein: The shielding mechanism (7) comprises a blocking frame (701), a traction rope (702), a roller (703), a positioning ring (704), a movable frame (705) and a second spring (706), the blocking frame (701) is slidably connected with the mounting frame (301), and the blocking frame (701) is in contact with the convex strip below the outer side of the mounting frame (301) to realize limiting.

8. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 7 wherein: The traction rope (702) is fixed on the blocking frame (701) and connected with the roller (703), and the roller (703) is bearing connected on the horizontal plate (101).

9. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 7 wherein: The positioning ring (704) is fixed on the traction rope (702) and nested connected with the movable frame (705), and the movable frame (705) is slidably connected with the horizontal plate (101).

10. A high voltage solid state soft starter device integrated with multiple filter units as claimed in claim 7 wherein: The movable frame (705) can slide in cooperation with the inclined block (607), and the second spring (706) is further fixed between the movable frame (705) and the horizontal plate (101).

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