Filter cotton fixing structure of converter

Abstract

The utility model discloses a filter cotton fixing structure of a converter. The filter cotton fixing structure comprises a converter box body, an axial flow fan assembly, flame-retardant filter cotton and a fence frame assembly, the axial flow fan assembly is fixed at the air inlet end of a radiator fixed on the converter box body, and the flame-retardant filter cotton is arranged at the air inlet of the axial flow fan assembly through the fence frame assembly; the fence frame assembly comprises a fence welding assembly and a fence mounting assembly, and the fence welding assembly is mounted on the axial flow fan assembly through the fence mounting assembly. Compared with the prior art, through the design of the wire binding rod in the axial flow fan assembly, a binding position is provided for the wire of the axial flow fan, through the design of the fence frame assembly, the filter cotton on the converter can be rapidly disassembled, assembled and fixed, the structure is simple, the operation is convenient, the processing is simple, and the production cost is further reduced.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit, and in particular is a converter filter cotton fixing structure. Background Technology

[0002] Currently, the converters used in rail transit (traction converters, auxiliary converters, etc.) generally adopt a forced air cooling layout. They mainly use centrifugal fans to generate suction, drawing in outside air and carrying away the heat generated by power devices (such as IGBTs, diodes, etc.) mounted on the heat sink. Specifically, the power heat-generating devices are mounted on a substrate (a rectangular shape made of aluminum alloy of a certain thickness) on the front of the heat sink, and then the heat is conducted out through fins spaced apart on the back of the substrate. When outside air passes through the gaps between each fin, it carries away the heat, and the heat dissipation process is carried out continuously.

[0003] Another method is to use an axial flow fan to directly blow heat onto the power devices, which is then transferred to the heat sink fins. Whether it's suction cooling or direct blowing cooling, the air entering the equipment compartment needs to be filtered. Filtration typically uses stainless steel wire mesh or flame-retardant filter cotton to block dust, willow catkins, poplar fluff, leaves, etc., from the outside air. Over time, dust or harmful substances can clog the surface of the stainless steel wire mesh or flame-retardant filter cotton, leading to a decrease in ventilation volume (or ventilation rate). This, in turn, affects the equipment's heat dissipation capacity. When the heat dissipation capacity is insufficient, the equipment will reduce power or stop working as a protection mechanism, affecting the operation of rail vehicles (such as subways or trains). Therefore, it's necessary to be able to quickly clean the filter or replace the filter cotton to maintain the cleanliness of the air inlet filtration device and ensure adequate ventilation for the equipment's heat dissipation.

[0004] The conventional installation scheme for cleaning filters or replacing filter cotton involves: setting up a U-shaped frame to insert a single or multiple layers of stainless steel wire mesh; when cleaning is required, removing it, cleaning and drying it before reinstalling; or setting up a hinge frame to clamp the flame-retardant filter cotton and installing it to the outside of the air inlet; the fixing methods are either buckles, bolts, or spring clips. All of these filter fixing structures can meet the needs of the equipment. However, the conventional installation scheme for cleaning filters or replacing filter cotton is complex, has high processing difficulty, and is inconvenient to disassemble. Utility Model Content

[0005] The purpose of this utility model is to provide a converter filter cotton fixing structure to realize the quick disassembly and fixing of the filter cotton on the converter.

[0006] The technical solution to achieve the purpose of this utility model is as follows: a converter filter cotton fixing structure, characterized in that it includes a converter housing, an axial flow fan assembly, flame-retardant filter cotton, and a fence frame assembly; the axial flow fan assembly is fixed to the air inlet end of the radiator fixed to the converter housing, and the flame-retardant filter cotton is set at the air inlet of the axial flow fan assembly through the fence frame assembly; the fence frame assembly includes: a fence welding assembly and a fence mounting assembly, and the fence welding assembly is mounted on the axial flow fan assembly through the fence mounting assembly.

[0007] Compared with the prior art, the significant advantages of this utility model are:

[0008] (1) By designing the tie rod in the axial flow fan assembly, a bundling position is provided for the wires of the axial flow fan, so that the wires coming out of the fan can be bundled nearby, so as to ensure that the wires will not be affected by the vibration of the vehicle operation and the random swinging, thus ensuring safety and reliability.

[0009] (2) The design of the axial flow fan assembly realizes the integrated assembly mode, which can integrate filter cotton, axial flow fan and other components in a smaller space size, thereby making more reasonable use of the filtration, air intake and sealing space.

[0010] (3) Through the design of the fence frame assembly, the filter cotton on the converter can be quickly disassembled and fixed. The structure is simple, the operation is convenient, and the processing is simple, thereby reducing production costs and maintenance time and improving operating efficiency. Attached Figure Description

[0011] Figure 1 Fence frame component 4 in closed state - overall 3D view;

[0012] Figure 2 Fence frame component 4 in the loosened state - overall 3D;

[0013] Figure 3 Diagram showing the replacement of flame-retardant filter cotton 3;

[0014] Figure 4 Schematic diagram of axial flow fan assembly 2 installed in converter housing 1;

[0015] Figure 5 Overall installation diagram of radiator 1-1;

[0016] Figure 6 1-1 3D schematic diagram of the radiator;

[0017] Figure 7 Exploded view of axial flow fan assembly 2;

[0018] Figure 8 2-1 3D view of the grille cover;

[0019] Figure 9Exploded view of four sections of the fence frame assembly;

[0020] Figure 10 3D view of fence frame component 4. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-10 The present invention will be further described in detail with reference to specific embodiments.

[0022] A converter filter cotton fixing structure includes: converter housing 1 (radiator 1-1), axial flow fan assembly 2 (grid cover 2-1, support column 2-2, cable tie rod 2-3, fan mounting bracket 2-4, axial flow fan 2-5), flame-retardant filter cotton 3, and fence frame assembly 4 (fence welding assembly 4-1, top column 4-2, actuating plate 4-3, spring 4-4, nut washer 4-5);

[0023] Converter housing 1: It is formed by cutting, bending and welding aluminum alloy material. It mainly provides an installation environment for electrical components and other structural components (such as equipment compartment). In addition, it can form an air duct compartment, install radiator 1-1, and then the power heating device installed on the surface of the radiator 1-1 substrate inside the housing conducts heat out through the spaced fins of radiator 1-1. Finally, the heat out is blown away by the axial flow fan.

[0024] Heat sink 1-1: A commercially available component made of 6063 aluminum alloy extruded profile; it is mainly used to install power devices that generate heat (such as IGBTs, diodes, etc.); and it can conduct heat out to achieve heat exchange and cooling through natural heat dissipation or forced air cooling.

[0025] Axial flow fan assembly 2 mainly includes the following components:

[0026] Grille cover 2-1: Made of stainless steel, cut and bent into shape; it is mainly used to provide the fitting and installation of flame-retardant filter cotton 3 and ventilation; in addition, the upper fixing hole 2-1-1 and the lower fixing hole 2-1-2 are provided on the upper and lower opposite surfaces of the grille cover 2-1 for the upper and lower insertion and fixing of the fence frame assembly 4.

[0027] Support column 2-2: It is machined from a stainless steel hexagonal bar with internal threaded holes at both ends. One end is fixedly connected to the grille cover 2-1 by screws, and the other end is fixedly connected to the short-pinch rivet screw 2-4-1 in the fan mounting bracket 2-4 by screws.

[0028] Cable tie rod 2-3: Made of stainless steel round steel bent into shape, it is installed on the long press screw 2-4-2 with a nut and washer. It mainly provides a bundling and installation position for the wires of the axial flow fan 2-5. This allows the wires coming out of the fan to be bundled nearby, so as to ensure that the wires are not subject to random swinging caused by the vibration of the vehicle operation, thus ensuring safety and reliability.

[0029] Fan mounting bracket 2-4: Made of stainless steel, cut, bent and riveted with screws; it mainly provides mounting for axial flow fan 2-5, cable tie rod 2-3 and support column 2-2;

[0030] Axial flow fan 2-5: This is a standard outsourced component. It is fixed to the fan mounting bracket 2-4 with screws, and the wires of the axial flow fan 2-5 are bundled together with the cable tie 2-3. The axial flow fan 2-5 is usually powered by low voltage DC12V or DC24V. Its main function is to absorb filtered air from the outside and blow it onto the spaced fins of the radiator 1-1 to remove the heat conducted by the radiator.

[0031] Flame-retardant filter cotton 3: Installed on the outside of the grille cover 2-1, it is an externally purchased component and has the functions of flame retardancy and air filtration. It is generally disposable and replaceable, that is, after a certain period of use, when the gaps are clogged with dust or lint, it is directly replaced with a new filter cotton; for example, depending on the usage environment, the subway company generally replaces it once every 1 to 6 months.

[0032] The fence frame assembly 4 includes: a fence welding assembly 4-1 and a fence mounting assembly, wherein the fence welding assembly 4-1 is mounted on the grid cover 2-1 via the fence mounting assembly.

[0033] The fence welding assembly 4-1 is mainly used to press the flame-retardant filter cotton 3 into the grille cover 2-1 and to provide ventilation. The fence welding assembly 4-1 includes a long horizontal bar 4-1-1, a vertical bar 4-1-2, and a welded threaded post 4-1-3. After being cut from stainless steel round bars, the long horizontal bar 4-1-1 and the vertical bar 4-1-2 are overlapped and welded together according to a certain interval. Threaded posts 4-1-3 are welded to the left and right sides of the upper long horizontal bar 4-1-1. The threaded posts 4-1-3 provide mounting positions for the top post 4-2, the actuating plate 4-3, the spring 4-4, and the nut washer 4-5. The whole assembly can press the flame-retardant filter cotton 3 into the grille cover 2-1 and provide ventilation.

[0034] The fence installation assembly includes top posts 4-2, actuating plates 4-3, springs 4-4, and nuts and washers 4-5. Springs 4-4 are inserted into threaded posts 4-1-3, and then the actuating plates 4-3 are used to press the springs 4-4, also inserting them into the threaded posts 4-1-3. Next, nuts and washers 4-5 are screwed onto the threaded posts 4-1-3 for tightening. Finally, the two top posts 4-2 are screwed into the threaded holes on the left and right sides of the actuating plates 4-3. The two top posts 4-2 mate with the upper fixing hole 2-1-1, and the vertical rod 4-1-2 mates with the lower fixing hole 2-1-2, thus achieving the installation of the fence frame assembly 4 and the axial flow fan assembly 2.

[0035] This utility model discloses a converter filter cotton fixing structure, the assembly process of which is as follows:

[0036] The various components of the converter housing 1 are assembled with bolts to form a complete housing 1, and the corresponding electrical and structural components are installed inside.

[0037] Install the axial flow fan 2-5 into the corresponding large round hole of the fan mounting bracket 2-4 using screws. Then, insert the cable tie rod 2-3 onto the long press-fit screw 2-4-2 and tighten it with nuts and washers. Then, bundle the fan's wires onto it. Next, screw the support column 2-2 into the short press-fit screw 2-4-1. Then, tighten the grille cover 2-1 onto the support column 2-2 using screws. This completes the assembly of the axial flow fan assembly 2.

[0038] Insert the spring 4-4 ​​into the threaded post 4-1-3, then press the actuating plate 4-3 against the spring 4-4 ​​and insert it into the threaded post 4-1-3 as well. Next, screw the nut and washer 4-5 into the threaded post 4-1-3 to tighten it. Finally, screw the two top posts 4-2 on the left and right sides into the threaded holes on the left and right sides of the actuating plate 4-3 respectively. This completes the assembly of the fence frame assembly 4.

[0039] The specific operation steps of the converter filter cotton fixing structure disclosed in this utility model are as follows:

[0040] First: Secure the axial fan assembly 2 to the air inlet end of the radiator 1-1 of the converter housing 1 with bolts; Second: Attach the flame-retardant filter cotton 3 to the inside of the grille cover 2-1; Finally, pinch the left and right actuating plates 4-3 with both hands respectively, press the actuating plates 4-3 with your index fingers and pinch the long horizontal bar 4-1-1 at the bottom with your thumbs (the spring 4-4 ​​is compressed, which in turn drives the top column 4-2 to descend); Finally, insert the whole thing into the grille cover 2-1, first inserting one row of vertical bars 4-1-2 into the lower fixing hole 2-1-2, and slowly release your fingers so that the top column 4-2 is inserted into the upper fixing hole 2-1-1. This completes the installation of the flame-retardant filter cotton 3.

[0041] The whole process is simple and reliable, easy to operate, and has a large ventilation opening area, which can effectively meet the ventilation requirements.

[0042] When the equipment is working, the inner end face of the axial flow fan 2-5 blows towards the fins of the radiator 1-1, carrying away heat; this is equivalent to the outer end face of the axial flow fan 2-5 drawing in air (the external air first passes through the grid frame assembly 4, then through the flame-retardant filter cotton 3, and then through the grid cover 2-1, reaching the axial flow fan 2-5).

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A converter filter cotton fixing structure, characterized in that, The device includes a converter housing (1), an axial fan assembly (2), flame-retardant filter cotton (3), and a fence frame assembly (4). The axial fan assembly (2) is fixed to the air inlet end of the radiator (1-1) fixed to the converter housing (1). The flame-retardant filter cotton (3) is set at the air inlet of the axial fan assembly (2) through the fence frame assembly (4). The fence frame assembly (4) includes a fence welding assembly (4-1) and a fence mounting assembly. The fence welding assembly (4-1) is mounted on the axial fan assembly through the fence mounting assembly.

2. The converter filter cotton fixing structure according to claim 1, characterized in that, The axial flow fan assembly (2) includes a grille cover (2-1), a support column (2-2), a wire tie rod (2-3), a fan mounting bracket (2-4), and an axial flow fan (2-5). The fan mounting bracket (2-4) is fixedly installed on the converter housing (1), the axial flow fan (2-5) is fixed on the fan mounting bracket (2-4), and the wire tie rod (2-3) is fixed on the fan mounting bracket (2-4) to provide a bundling position for the wires of the axial flow fan (2-5). The fan mounting bracket (2-4) and the grille cover (2-1) are fixedly connected through the support column (2-2), and the grille cover (2-1) is used to install the fence frame assembly (4).

3. The converter filter cotton fixing structure according to claim 1, characterized in that, The upper surface of the grille cover (2-1) is provided with an upper fixing hole (2-1-1); the lower surface of the grille cover (2-1) is provided with a lower fixing hole (2-1-2).

4. The converter filter cotton fixing structure according to claim 3, characterized in that, The fence welding assembly (4-1) includes a long horizontal bar (4-1-1), a vertical bar (4-1-2), and a welded threaded post (4-1-3); the long horizontal bar (4-1-1) and the vertical bar (4-1-2) are overlapped and welded together, and the threaded posts (4-1-3) are welded on both sides of the upper long horizontal bar (4-1-1); the vertical bar (4-1-2) is fitted with the lower fixing hole (2-1-2).

5. The converter filter cotton fixing structure according to claim 4, characterized in that, The fence installation assembly includes a top post (4-2), a lever (4-3), a spring (4-4), and a nut washer (4-5). The spring (4-4) is fitted into the threaded post (4-1-3), the lever (4-3) is fitted into the threaded post (4-1-3) and positioned above the compression spring (4-4), and the nut washer (4-5) is screwed into the threaded post (4-1-3) for tightening. The top posts (4-2) on the left and right are screwed into the threaded holes on the left and right sides of the lever (4-3). The top posts (4-2) cooperate with the upper fixing hole (2-1-1) to realize the installation of the fence frame assembly (4) and the axial flow fan assembly (2).

6. The converter filter cotton fixing structure according to claim 4, characterized in that, The long horizontal bar (4-1-1), vertical bar (4-1-2), and welded threaded column (4-1-3) are cut from stainless steel round bars.

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