Vacuum high-voltage soft starting cabinet
By introducing vacuum components and a heat dissipation system into the high-voltage soft starter cabinet, the impact of the external environment on the equipment is resolved, achieving stable operation and improved safety, while reducing maintenance costs and failure frequency.
Patent Information
- Application Number
- CN202423228528.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing high-voltage soft starter cabinets are easily affected by the external environment, which can lead to moisture in the lines, dust accumulation and accelerated aging. Foreign objects entering the line may cause electrical arcing or explosion, and poor heat dissipation affects equipment use and production.
A vacuum high-pressure soft starter cabinet was designed, equipped with a vacuum pumping component and a heat dissipation system, including an air intake component, an exhaust component and a vacuum pump. It creates a vacuum environment by pumping air to prevent foreign objects from entering and to dissipate heat in a timely manner, ensuring stable operation of the equipment.
It effectively prevents dust and foreign objects from entering, avoids electrical short circuits and explosions, extends equipment life, reduces maintenance costs, and improves production efficiency and safety.
Smart Images
Figure CN223665858U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of high voltage electrical technology, and in particular relates to a soft starter cabinet. Background Technology
[0002] High-voltage soft starters are widely used in various industries due to their advantages such as reduced starting current, lower mechanical stress during startup, reduced maintenance costs, and improved system reliability and safety. However, existing high-voltage soft starters are susceptible to external environmental influences, which can lead to circuit board circuitry becoming damp or aging faster due to dust accumulation. When foreign objects enter the cabinet, the originally set phase spacing may be reduced, which not only reduces equipment safety but may also cause electrical arcing, or even explosion in extreme cases. Furthermore, high-voltage soft starters are also affected by temperature changes in ambient environments, especially in hot weather. If the increased temperature inside the cabinet is not dissipated in time, it can not only affect the normal operation of the equipment but also adversely impact production. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the deficiencies and defects mentioned in the background art above, and to provide a vacuum high-voltage soft starter cabinet that can ensure that its soft starter operates in a suitable environment, avoid the entry of dust and foreign objects, and ensure good heat dissipation conditions to ensure the long-term stable operation of the equipment.
[0004] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:
[0005] A vacuum high-pressure soft starter cabinet includes a cabinet body and a soft starter device disposed within the cabinet body. It also includes a vacuum pumping component disposed on the cabinet body for allowing air circulation inside the cabinet to dissipate heat from the soft starter device and for pumping air to maintain a vacuum environment in the cabinet body.
[0006] In the aforementioned vacuum high-pressure soft starter cabinet, preferably, the vacuuming assembly includes an air inlet component and an exhaust component for the entry and exit of gas inside the cabinet, and a vacuum pump for extracting gas from the cabinet. The air inlet component is located on the lower side of one side of the cabinet, the exhaust component is located on the upper side of the cabinet, and the vacuum pump is located inside the cabinet and connected to the exhaust component through an exhaust channel.
[0007] In the aforementioned vacuum high-pressure soft starter, preferably, the air intake component includes an air intake door rotatably mounted on the cabinet body and a first hydraulic linkage for opening / closing the air intake door. One end of the first hydraulic linkage is connected to the cabinet body, and the other end is connected to the side of the air intake door near the cabinet body. The exhaust component includes an exhaust door rotatably mounted on the cabinet body and a second hydraulic linkage for opening / closing the exhaust door. One end of the second hydraulic linkage is connected to the cabinet body, and the other end is connected to the side of the exhaust door near the cabinet body. Both the air intake door and the exhaust door are provided with sealing rings to prevent gas from entering when closed. With this setup, after the soft starter cabinet completes its soft start operation, the inlet and outlet valves open outwards via the first and second hydraulic linkages, respectively. Then, a vacuum pump draws in air from the inlet valve at the bottom of the cabinet and exhausts it through the outlet valve at the top. This allows the soft starter within the cabinet to dissipate heat through the circulating air, improving its reliability and lifespan, reducing overheating-related malfunctions, and thus decreasing maintenance needs and costs. Conversely, after heat dissipation, the inlet valve closes inwards via the first hydraulic linkage. The vacuum pump then extracts air from the cabinet, and finally, the outlet valve closes via the second hydraulic linkage, creating a sealed vacuum environment within the cabinet. This effectively protects the soft starter from arcing and temperature / humidity fluctuations, further enhancing its performance and reliability.
[0008] In the aforementioned vacuum high-pressure soft starter cabinet, preferably, at least one side of the cabinet body is provided with a sealing plate for facilitating the installation and maintenance of the soft starter device, and the sealing plate is detachably and sealingly connected to the cabinet body. The detachably connected sealing plate allows maintenance personnel to quickly install the soft starter device inside the cabinet and perform necessary inspections and maintenance, improving installation and maintenance efficiency while ensuring airtightness.
[0009] In the aforementioned vacuum high-pressure soft starter cabinet, preferably, the cabinet body is equipped with an air alarm for monitoring the air concentration inside the cabinet. The air alarm provides real-time air concentration monitoring and can promptly sound an alarm when air enters the sealed environment inside the cabinet, enabling personnel to detect leaks and handle them in a timely manner.
[0010] In the aforementioned vacuum high-voltage soft starter switchgear, preferably, the soft starter device includes a soft starter silicon box, which is a detachable soft starter silicon box, comprising a base plate and multiple silicon boxes. The multiple silicon boxes are mounted on the base plate and are not interconnected. The base plate is mounted within the switchgear. Compared to existing partition-type silicon boxes, the detachable soft starter silicon box significantly reduces the space occupied by the silicon boxes in the switchgear, allowing the switchgear to accommodate more supporting equipment, improving space utilization. It eliminates the need for additional auxiliary cabinets to house supporting equipment and reduces the need for numerous copper busbars for connections, thus reducing the space occupied by supporting equipment in the power distribution room and lowering costs.
[0011] In the aforementioned vacuum high-voltage soft starter cabinet, preferably, the soft starter device further includes an incoming line isolation contactor and an outgoing line isolation contactor for electrically isolating the soft starter silicon box, and a bypass contactor for switching the motor to bypass operation after soft start, all three of which are electrically connected to the soft starter silicon box. The incoming terminal of the soft starter silicon box is connected to the incoming isolation contactor, and the outgoing terminal is connected to the outgoing isolation contactor. The bypass contactor is connected in parallel with the soft starter silicon box, the incoming isolation contactor, and the outgoing isolation contactor. This allows the motor to be soft-started through the soft starter silicon box, and after the incoming and outgoing isolation contactors are opened, the bypass contactor is closed, and the motor is switched to bypass operation through the bypass contactor. This setting can provide complete power-off protection for the soft starter silicon box, allowing the soft starter cabinet to be used with power for a long time. When the soft starter silicon box needs maintenance or repair, since the incoming and outgoing terminals of the silicon box are completely de-energized using isolation contactors, the motor can continue to run normally through the bypass contactor. This does not delay production and also provides good protection for maintenance personnel, shortening the maintenance and repair cycle.
[0012] In the aforementioned vacuum high-voltage soft starter cabinet, preferably, the soft starter silicon box and bypass contactor are located in the middle of the cabinet, while the outgoing line isolation contactor and incoming line isolation contactor are located at the top and bottom of the cabinet, respectively. This arrangement provides sufficient space for operation and maintenance of each device, facilitates the inspection of the soft starter silicon box, allows for wiring according to the line routing, reduces wiring complexity, and makes wiring work more intuitive and simple. Furthermore, since all devices are within the same cabinet, the amount of cable used is greatly reduced, and the overall safety is improved because the contactors and cables are in a vacuum environment.
[0013] In the aforementioned vacuum high-voltage soft starter cabinet, preferably, the cabinet body is equipped with an incoming cable and an outgoing cable. The soft starter device also includes a current transformer for measuring and monitoring the current. One end of the current transformer is connected to the incoming cable, and the other end is electrically connected to both the incoming isolation contactor and the bypass contactor. This configuration allows the current transformer to monitor the soft starter circuit and the bypass circuit separately, enabling more reliable detection and prevention of faults such as overload and short circuit.
[0014] In the aforementioned vacuum high-voltage soft starter cabinet, preferably, one side of the cabinet is provided with an outdoor wall-penetrating sleeve for the entry and exit of the incoming and outgoing cables and for sealing the cabinet. The cables entering and exiting the cabinet through the outdoor wall-penetrating sleeve effectively maintains the cabinet's sealed state.
[0015] Compared with the prior art, the advantages of this utility model are:
[0016] This invention, by incorporating a vacuum assembly, ensures that the soft starter within the cabinet is unaffected by external environmental factors. This effectively prevents foreign objects from entering the cabinet, thus avoiding safety hazards such as electrical short circuits, arcing, and even explosions, significantly improving the overall safety of the soft starter cabinet. It also prevents aging of the circuit board due to moisture or dust, extending the service life of the soft starter. In this controlled environment, equipment failures caused by environmental factors are reduced, lowering maintenance costs and repair frequency, and enhancing the stability and reliability of the soft starter. Furthermore, the vacuum assembly ensures timely heat dissipation of the soft starter, preventing overheating, reducing heat accumulation, slowing down equipment aging, and preventing disruptions to production due to insufficient heat dissipation, thereby improving production efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the heat dissipation state of the vacuum high-voltage soft starter cabinet in an embodiment;
[0019] Figure 2 This is a schematic diagram of the closed-state planar structure of the vacuum high-pressure soft starter cabinet in an embodiment.
[0020] Legend
[0021] 1. Cabinet; 2. Vacuum pump; 3. Inlet valve; 4. First hydraulic linkage; 5. Exhaust valve; 6. Second hydraulic linkage; 7. Sealing plate; 8. Soft starter silicon box; 9. Incoming line isolating contactor; 10. Outgoing line isolating contactor; 11. Bypass contactor; 12. Current transformer; 13. Outdoor wall bushing; 14. Incoming cable; 15. Outgoing cable. Detailed Implementation
[0022] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.
[0023] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.
[0024] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.
[0025] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.
[0026] Example:
[0027] like Figure 1 and Figure 2 As shown, the vacuum high-pressure soft starter cabinet of this embodiment includes a cabinet body 1 and a soft starter device disposed in the cabinet body 1. It also includes a vacuum pumping component disposed on the cabinet body 1 for allowing air circulation inside the cabinet to dissipate heat from the soft starter device and for pumping air to maintain a vacuum environment in the cabinet body 1.
[0028] In this embodiment, the vacuum assembly includes an air intake component and an exhaust component for the gas to enter and exit the cabinet 1, and a vacuum pump 2 for extracting the gas from the cabinet 1. The air intake component is located on the lower side of one side of the cabinet 1, the exhaust component is located on the upper side of the cabinet 1, and the vacuum pump 2 is located inside the cabinet 1 and connected to the exhaust component through an exhaust channel.
[0029] In this embodiment, the air intake component includes an air intake door 3 rotatably mounted on the cabinet 1 and a first hydraulic linkage 4 for opening / closing the air intake door 3. One end of the first hydraulic linkage 4 is connected to the cabinet 1, and the other end is connected to the side of the air intake door 3 near the cabinet 1. The exhaust component includes an exhaust door 5 rotatably mounted on the cabinet 1 and a second hydraulic linkage 6 for opening / closing the exhaust door 5. One end of the second hydraulic linkage 6 is connected to the cabinet 1, and the other end is connected to the side of the exhaust door 5 near the cabinet 1. Both the air intake door 3 and the exhaust door 5 are provided with sealing rings to prevent gas from entering when closed.
[0030] In this embodiment, the specific operation steps are as follows: after the soft starter device completes the soft start operation, as follows: Figure 1As shown, the first hydraulic link 4 and the second hydraulic link 6 open the intake valve 3 and the exhaust valve 5 respectively, then control the vacuum pump 2 to start working, drawing in cold air from outside through the intake valve 3 at the bottom and expelling it through the exhaust valve 5 at the top of the cabinet, thus removing heat from the cabinet 1. After working for a period of time, the intake valve 3 is closed, and the vacuum pump 2 continues to work until the entire sealed environment is evacuated to a vacuum state. Figure 2 As shown, finally close exhaust valve 5.
[0031] In this embodiment, at least one side of the cabinet 1 is provided with a sealing plate 7 for facilitating the installation and maintenance of the soft starter. The sealing plate 7 is detachably and sealingly connected to the cabinet 1. The cabinet 1 can be manufactured using full welding technology. The sealing plate 7 is equipped with a sealing ring to ensure the airtightness of the cabinet 1. Two sealing plates 7 can be provided, one on the front and one on the back of the cabinet 1 facing the operator, to facilitate the installation and maintenance of the soft starter. Finally, they are detachably connected to the cabinet 1 with screws.
[0032] In this embodiment, the cabinet 1 is equipped with an air alarm for monitoring the air concentration inside the cabinet 1.
[0033] In this embodiment, the soft starter device includes a soft starter silicon box 8, which is a detachable soft starter silicon box, including a base plate and multiple silicon boxes. The multiple silicon boxes are installed on the base plate and are not connected to each other. The base plate is mounted in the cabinet 1.
[0034] In this embodiment, the soft starter device further includes an incoming isolation contactor 9 and an outgoing isolation contactor 10 for electrically isolating the soft starter silicon box 8, and a bypass contactor 11 for switching the motor to bypass operation after soft start. All three are electrically connected to the soft starter silicon box 8. The three are connected to the soft starter silicon box 8 via copper busbars.
[0035] In this embodiment, the soft starter box 8 and the bypass contactor 11 are located in the middle of the cabinet 1, and the outgoing line isolation contactor 10 and the incoming line isolation contactor 9 are located at the top and bottom of the cabinet 1, respectively.
[0036] In this embodiment, the cabinet 1 is provided with an incoming cable 14 and an outgoing cable 15. The soft starter also includes a current transformer 12 for measuring and monitoring the current. One end of the current transformer 12 is connected to the incoming cable 14, and the other end is electrically connected to the incoming isolation contactor 9 and the bypass contactor 11, respectively.
[0037] In this embodiment, one side of the cabinet 1 is provided with an outdoor through-wall sleeve 13 for the incoming cable 14 and the outgoing cable 15 to enter and exit the cabinet 1 and to seal them.
[0038] In this embodiment, the soft starter circuit is divided into a soft start route and a bypass route. The soft start route connects the current transformer 12, the incoming isolating contactor 9, the soft starter silicon box 8, the outgoing isolating contactor 10, and the outgoing cable 15 sequentially via the incoming cable 14. The bypass route connects the current transformer 12, the bypass contactor 11, and the outgoing cable 15 sequentially via the incoming cable 14. After the motor completes a soft start via the soft start route, the incoming isolating contactor 9 and the outgoing isolating contactor 10 disconnect, completely de-energizing the soft starter silicon box 8. The bypass contactor 11 then connects, and the motor continues to run via the bypass route.
[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A vacuum high-pressure soft starter cabinet, comprising a cabinet body (1) and a soft starter device disposed within the cabinet body (1), characterized in that, It also includes a vacuum assembly installed on the cabinet (1) for allowing air circulation inside the cabinet to dissipate heat from the soft starter and for evacuating air to maintain a vacuum environment in the cabinet (1). The vacuum assembly includes an air intake component and an exhaust component for the gas to enter and exit the cabinet (1), and a vacuum pump (2) for extracting the gas from the cabinet (1). The air intake component is located below one side of the cabinet (1), the exhaust component is located above the cabinet (1), and the vacuum pump (2) is located inside the cabinet (1) and connected to the exhaust component through an exhaust channel. The air intake component includes an air intake door (3) rotatably mounted on the cabinet (1) and a first hydraulic linkage (4) for opening / closing the air intake door (3). One end of the first hydraulic linkage (4) is connected to the cabinet (1), and the other end is connected to the side of the air intake door (3) near the cabinet (1). The exhaust component includes an exhaust door (5) rotatably mounted on the cabinet (1) and a second hydraulic linkage (6) for opening / closing the exhaust door (5). One end of the second hydraulic linkage (6) is connected to the cabinet (1), and the other end is connected to the side of the exhaust door (5) near the cabinet (1). Both the air intake door (3) and the exhaust door (5) are provided with sealing rings to prevent gas from entering when closed.
2. The vacuum high-voltage soft starter according to claim 1, characterized in that, At least one side of the cabinet (1) is provided with a sealing plate (7) for facilitating the installation and maintenance of the soft starter device. The sealing plate (7) is detachably and sealed to the cabinet (1).
3. The vacuum high-pressure soft starter according to claim 1, characterized in that, The cabinet (1) is equipped with an air alarm for monitoring the air concentration inside the cabinet (1).
4. The vacuum high-pressure soft starter according to any one of claims 1-3, characterized in that, The soft starter device includes a soft starter silicon box (8), which is a detachable soft starter silicon box, including a base plate and multiple silicon boxes. The multiple silicon boxes are installed on the base plate and are not connected to each other. The base plate is mounted in the cabinet (1).
5. The vacuum high-pressure soft starter according to claim 4, characterized in that, The soft starter device also includes an incoming isolation contactor (9) and an outgoing isolation contactor (10) for electrically isolating the soft starter silicon box (8), and a bypass contactor (11) for switching the motor to bypass operation after soft start. All three are electrically connected to the soft starter silicon box (8).
6. The vacuum high-voltage soft starter according to claim 5, characterized in that, The soft starter box (8) and bypass contactor (11) are located in the middle of the cabinet (1), and the outgoing isolation contactor (10) and incoming isolation contactor (9) are located at the top and bottom of the cabinet (1), respectively.
7. The vacuum high-pressure soft starter according to claim 5, characterized in that, The cabinet (1) is provided with an incoming cable (14) and an outgoing cable (15). The soft starter also includes a current transformer (12) for measuring and monitoring the current. One end of the current transformer (12) is connected to the incoming cable (14), and the other end is electrically connected to the incoming isolation contactor (9) and the bypass contactor (11) respectively.
8. The vacuum high-voltage soft starter according to claim 7, characterized in that, The cabinet (1) has an outdoor wall sleeve (13) on one side for the incoming cable (14) and outgoing cable (15) to enter and exit the cabinet (1) and to seal them.