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Structural design principle of small-scale high-protection online soft-start cabinet

Nov 04, 2020

Structural design principle of small-scale high-protection online soft-start cabinet


The structure of the small and high-protection online soft-start cabinet realizes the integration of the soft-start function and the electric cabinet. It is small in size, high in protection level, and high in heat dissipation efficiency, realizing the scope of application of high power.


In order to achieve the above-mentioned purpose, the small-scale high-protection online soft-start cabinet structure designed by the present invention includes a cabinet body and a left door assembly and a right door assembly connected to the cabinet body. The cabinet body is composed of an inner panel and two inner panels. The side panel on the side, the top panel at the upper end of the inner panel, and the bottom panel at the lower end of the inner panel are enclosed. The line inlet on the top panel is provided with a line inlet cover to prevent rainwater from above the cabinet from entering the cabinet. Each side panel is equipped with an air inlet, and each side panel is equipped with a fan cover that seals the air inlet to prevent side rainwater and rainwater from the bottom of the cabinet from splashing. The cabinet is equipped with two-layer partitions and two-layer partitions. One end of the board is hinged to a side board by a louver hinge, the other end of the second-layer partition is fixed to the inner board by a mounting post on the inner board, and the second-layer partition faces the inner board with strong electricity and power installed. The device, the strong current and the power device are separated by the second-layer partition, which realizes the strong current isolation. After the second-layer partition is opened, the power components and the connection part of the strong current can be repaired and maintained to meet the convenience of construction and maintenance. A controller box is installed on the other side of the partition, and the controller box is set in the cabinet as an independent unit, which can be visually presented in front of the operator after opening the left door assembly and the right door assembly.


The controller box is sealed and installed on the second-layer partition. The controller box is equipped with a controller. The electromagnetic shielding of the second-layer partition and the controller box enables the control part to achieve electromagnetic shielding, and the software engineer can use the function according to the actual If necessary, the controller is programmed to realize the complete setting operation of the soft start control part, and the soft start function part is distributed in the start cabinet as a whole, and the soft start function is integrated with the electric cabinet, and the controller With the opening and closing of the second-layer partition, installation and maintenance can be carried out according to construction needs.


The outer side of the inner plate is provided with a radiator. The radiator is installed on the inner plate through bolt mounting holes. A power component is installed on the radiator. A radiator cover is provided on the outer side of the inner plate to cover the radiator. The cover is equipped with a fan frame for installing the cooling fan. The selection of power components is only related to the selection of the radiator. The heat dissipation performance of the radiator and the high-power capacity are used to realize the full range of power components from high to low power. Covering, the shape and size of the radiator does not change with the transformation of power components, realizing the convertibility of power components under the same structure form. In addition, the radiator and the fan frame integrally form a heat dissipation unit, which is arranged outside the cabinet to realize heat dissipation. The functional part is independent, and the fan rack can select and match the number of fans and types according to different heat dissipation requirements, which realizes the expansion of the heat dissipation function.


The left door component is connected to one side panel by a hinge, and the right door component is connected to the other side panel by a hinge. Both the left door component and the right door component are equipped with sealing strips. The length of the sealing strip is the same as that of the cabinet body folding edge and width It is greater than the gap width between the cabinet body and the left door assembly and the right door assembly when the cabinet is closed. When the left door assembly and the right door assembly are in close contact with the cabinet body, the protection level of the cabinet body is improved. The inner side of the left door assembly and the right door assembly are equipped with a cable rack, and the inner panel is equipped with a cable rack. After the installation of the components in the cabinet is completed, the production personnel perform the wire binding operation according to the fixed cable rack position. Realize the unification of the wiring in the same type of electrical cabinet in the production process. The joints of the various parts of the cabinet are bent and beveled, so that the left door assembly and the right door assembly become a whole after being installed with the cabinet. In the IP54 test, the rainwater from the top and the side of the cabinet achieves diversion and Prevent rainwater from entering the cabinet and realize the high protection level requirements for the cabinet.


Several installation posts are provided on the inner side of the inner panel to facilitate the installation of equipment in the cabinet.


The two-layer partition and the cabinet are both grounded, which improves safety. The wire inlet is located on the inner plate, side plate or bottom plate, and a wire inlet cover is provided on the wire inlet.


Both the wire inlet and the air inlet are sheet metal parts, which ensure a high level of protection and realize the cost reduction and design applicability of the cabinet. Compared with the prior art, the utility model has the following advantages:


1. The online soft start cabinet is designed in a decentralized manner according to the functional parts, which realizes the integration of the online soft start function and the electric cabinet, and is independent according to the environmental requirements of different functional parts in actual applications, thus reducing the overall start cabinet volume of;


2. Through the design of an external radiator, the heat dissipation problem, the factor limiting the soft start power range, is solved, the heat dissipation efficiency is improved, and the application range of high power is realized;


3. The air inlet and the wire inlet are designed with sheet metal parts, which realizes the cost reduction and design applicability of the cabinet while ensuring the high protection level, and the protection level of the cabinet structure is IP54;


4. Through the decentralized design of the soft start function, the control unit with higher requirements for the use environment is also independent, and the control part can be set and electromagnetic shielded;


5. The double-layer structure design not only satisfies the decentralization of soft start function, but also realizes the convenience of strong electrical isolation and maintenance;


6. The general-purpose radiator used in the radiator has lower cost and can cover more power components with power requirements, expanding the power range and increasing the scope of application of the online soft start cabinet.