A frequency converter mounting structure for an explosion-proof electric locomotive

Abstract

The utility model belongs to frequency converter installation technical field especially relates to a frequency converter installation structure of explosion -proof electric locomotive, including the box, the inner chamber of box is provided with frequency converter main part, the cover plate, the activity is established in the upper portion of frequency converter main part, the heat conduction sheet, fixed mounting is established on the lateral wall of frequency converter main part, positioning heat conduction subassembly, positioning heat conduction subassembly includes the pair of heat conduction plate of setting in the side of frequency converter main part, the utility model is convenient for the maintenance of frequency converter's overhaul later period, the heat conduction sheet is directly fixed in the lateral wall of frequency converter main part, can fast conduction the heat that frequency converter works produces, solves the heat dissipation problem of core component, in positioning heat conduction subassembly, the cooperation of two -way screw rod and screw rod cover can accurate regulation heat conduction plate position, makes heat conduction plate stick to heat conduction sheet and enhance the heat dissipation efficiency, and can realize the quick positioning of frequency converter main part in the box through the cooperation of positioning block and positioning groove, avoids the displacement of frequency converter main part.

Description

Technical Field

[0001] This utility model belongs to the field of frequency converter installation technology, and in particular relates to a frequency converter installation structure for an explosion-proof electric locomotive. Background Technology

[0002] In the operation system of explosion-proof electric locomotives, the frequency converter, as a core control component, directly affects the operational stability, explosion-proof safety, and maintenance convenience of the locomotive due to the rationality of its installation structure. Currently, the frequency converter installation structures used in explosion-proof electric locomotives generally suffer from the following technical challenges: First, it is difficult to balance explosion-proof performance and ease of maintenance. Traditional installation structures mostly adopt a fixed and sealed enclosure design, which can meet the explosion-proof requirements and isolate external flammable and explosive gases or dust from entering. However, when the frequency converter malfunctions and needs to be repaired, multiple fixed parts of the enclosure need to be disassembled, which is cumbersome and time-consuming, greatly extending the downtime for maintenance and affecting the efficiency of locomotive operation.

[0003] Secondly, insufficient heat dissipation efficiency can easily lead to equipment failure. Inverters generate a large amount of heat during operation, but in existing structures, the heat dissipation components have poor contact with the inverter body, and the heat conduction path is not continuous. Some installation structures rely solely on the natural heat dissipation of the enclosure, which cannot quickly dissipate the heat from the inverter's core components. This causes temperature buildup inside the enclosure, and prolonged exposure to high temperatures can accelerate the aging of inverter components, and even lead to safety hazards such as short circuits and shutdowns, reducing the equipment's lifespan.

[0004] Finally, the positioning stability is poor and the installation process is complex. In traditional installation methods, the positioning of the frequency converter in the enclosure mostly relies on bolt fixing or simple snap-fit ​​structures. This not only results in low positioning accuracy but also makes it prone to displacement during the bumpy ride of the locomotive, affecting the stability of the circuit connection. Improvements are urgently needed. Therefore, we propose a frequency converter installation structure for explosion-proof locomotives. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing a frequency converter installation structure for explosion-proof electric locomotives, which facilitates quick installation and heat conduction of the frequency converter.

[0006] In view of this, the present invention provides an inverter installation structure for an explosion-proof electric locomotive, including a housing, an inverter body disposed in the inner cavity of the housing, a cover plate movably disposed above the inverter body, a heat-conducting plate fixedly mounted on the side wall of the inverter body, a positioning heat-conducting assembly including a pair of heat-conducting plates disposed on the side of the inverter body, a lead screw sleeve fixedly mounted on the inner side of the heat-conducting plate, a sliding groove opened on the outer side of the heat-conducting plate, a bidirectional lead screw rotatably disposed in the inner cavity of the sliding groove, the bidirectional lead screw being threadedly connected to the lead screw sleeve, a positioning block fixedly mounted on the outer side of the heat-conducting plate, a positioning groove opened on the inner wall of the housing, the positioning groove being disposed on both sides of the inner cavity of the inverter body, and a transmission assembly disposed below the cover plate. The cover plate is inserted into the top of the housing and can drive the bidirectional lead screw to rotate through the transmission assembly, thereby driving the heat-conducting plate to move and causing the positioning block to be inserted into the positioning groove.

[0007] Furthermore, four positioning blocks are provided, and each positioning block corresponds to a positioning groove. The size of the positioning block is adapted to the size of the positioning groove, and the positioning block and the positioning groove are movably connected.

[0008] Furthermore, the transmission assembly includes a rack disposed below the cover plate, a gear is fixedly installed in the middle of the bidirectional lead screw, the rack is disposed at the upper end of the gear, and the rack meshes with the gear.

[0009] Furthermore, the heat-conducting sheet, positioning block, heat-conducting plate, and housing are all made of heat-conducting material, and the surface of the heat-conducting plate is in contact with the surface of the heat-conducting sheet.

[0010] Furthermore, a protective frame is provided on the outer side of the heat-conducting sheet, and the protective frame is fixedly connected to the heat-conducting sheet by welding. The protective frame is located on the outer side of the heat-conducting plate.

[0011] Furthermore, the cover plate has a first screw hole around its upper perimeter, and the box body has a second screw hole around its upper perimeter, with the first screw hole and the second screw hole having the same size.

[0012] Furthermore, a mounting base is welded to the lower end of the housing, and nut seats are welded to all four sides of the lower end of the mounting base.

[0013] Furthermore, a limiting frame is welded to the upper end of the protective frame, and the limiting frame is positioned above the gear.

[0014] The beneficial effects of this utility model are: The movable cover facilitates future maintenance and repair of the inverter, while also providing a sealed enclosure during normal operation, thus protecting the inverter body. The heat-conducting plate is directly fixed to the side wall of the inverter body, quickly transferring heat generated during operation and solving the heat dissipation problem of core components. In the positioning heat-conducting assembly, the cooperation between the bidirectional lead screw and the lead screw sleeve allows for precise adjustment of the heat-conducting plate position. This ensures the heat-conducting plate adheres closely to the heat-conducting plate, enhancing heat dissipation efficiency, and also enables rapid positioning of the inverter body within the enclosure through the cooperation of the positioning block and positioning slot, preventing displacement of the inverter body. Simultaneously, when the cover is inserted, the transmission assembly drives the bidirectional lead screw to rotate, linking the cover installation with inverter positioning and heat dissipation structure adjustment, simplifying the installation process and eliminating the need for additional tools to operate the positioning and heat dissipation components separately, thereby improving overall installation efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the inverter installation structure for an explosion-proof electric locomotive proposed in this utility model. Figure 2 This is a first-view structural diagram of the internal structure of the inverter installation structure of an explosion-proof electric locomotive proposed in this utility model. Figure 3 This is a schematic diagram of the internal second-view structure of the inverter installation structure of an explosion-proof electric locomotive proposed in this utility model; Figure 4 This is a schematic diagram of the positioning and heat-conducting components and the transmission components of the inverter mounting structure for an explosion-proof electric locomotive proposed in this utility model. Figure 5 This utility model proposes a frequency converter mounting structure for an explosion-proof electric locomotive. Figure 4 Enlarged view of point A; The markings in the diagram are as follows: 1. Housing; 11. Mounting base; 12. Nut seat; 13. Cover plate; 14. First screw hole; 15. Second screw hole; 16. Inverter body; 17. Heat-conducting plate; 2. Protective frame; 21. Heat-conducting plate; 22. Lead screw sleeve; 23. Slide groove; 24. Double-acting lead screw; 25. Gear; 26. Rack; 27. Limiting frame; 3. Positioning block; 4. Positioning groove. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0018] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0021] Reference Figures 1 to 5 An inverter mounting structure for an explosion-proof electric locomotive includes a housing 1, an inverter body 16 disposed within the inner cavity of the housing 1, a cover plate 13 movably disposed above the inverter body 16, a heat-conducting plate 17 fixedly mounted on the side wall of the inverter body 16, and a positioning heat-conducting assembly comprising a pair of heat-conducting plates 21 disposed on the side of the inverter body 16, a lead screw sleeve 22 fixedly mounted on the inner side of the heat-conducting plate 21, and a sliding groove 23 formed on the outer side of the heat-conducting plate 17. The inner cavity of 23 is provided with a bidirectional lead screw 24, which is threadedly connected to the lead screw sleeve 22. A positioning block 3 is fixedly installed on the outer side of the heat-conducting plate 21. A positioning groove 4 is opened on the inner wall of the housing 1. The positioning groove 4 is located on both sides of the inner cavity of the inverter body 16. The transmission assembly is located below the cover plate 13. The cover plate 13 is inserted into the top of the housing 1 and can drive the bidirectional lead screw 24 to rotate through the transmission assembly, thereby driving the heat-conducting plate 21 to move and insert the positioning block 3 into the positioning groove 4.

[0022] During installation, the inverter body 16 is first placed inside the housing 1. The housing 1, together with the cover plate 13, forms a closed structure to isolate external impurities and provide a protective environment for the inverter. The heat-conducting plate 17 is fixed to the side wall of the inverter body 16, which can receive the heat generated by the inverter in real time and conduct it initially. During installation, the cover plate 13 is inserted into the top of the housing 1. As the cover plate 13 moves down, it drives the transmission assembly below to move. The transmission assembly converts the linear motion of the cover plate 13 into the rotational motion of the bidirectional lead screw 24. The bidirectional lead screw 24 is threadedly connected to the lead screw sleeve 22 on the inner side of the heat-conducting plate 21. When the bidirectional lead screw 24 rotates, it drives the heat-conducting plates 21 on both sides. The heat-conducting plate 21 moves towards the heat-conducting plate 17 along the outer groove 23. On the one hand, the heat-conducting plate 21 is tightly attached to the heat-conducting plate 17 to form a heat conduction path, further transferring the heat on the heat-conducting plate 17 to the heat-conducting plate 21. On the other hand, the positioning block 3 on the outer side of the heat-conducting plate 21 moves with the heat-conducting plate 21 and gradually inserts into the positioning groove 4 preset in the inner wall of the housing 1, realizing the positioning and fixing of the inverter body 16 in the housing 1. When the cover plate 13 is fully inserted into place, the bidirectional screw 24 stops rotating, and the positioning and heat dissipation of the heat-conducting plate 21 are completed simultaneously. At this time, the cover plate 13 closes the housing 1, which not only protects the inverter body 16, but also completes the overall installation process.

[0023] In the example of this application, four positioning blocks 3 are provided, and each positioning block 3 corresponds to a positioning groove 4. The size of the positioning block 3 is adapted to the size of the positioning groove 4, and the positioning block 3 and the positioning groove 4 are movably connected.

[0024] As a preferred example of this utility model, when the bidirectional lead screw 24 rotates to drive the heat-conducting plate 21 to move, the four positioning blocks 3 on the outer side of the heat-conducting plate 21 move synchronously to correspond to the four positioning slots 4 on the inner walls of both sides of the housing 1. Since the positioning blocks 3 and the positioning slots 4 are size-matched, the positioning blocks 3 can be embedded in the positioning slots 4, thereby limiting the lateral, longitudinal and vertical displacement of the inverter body 16 in the housing 1. During subsequent disassembly, the bidirectional lead screw 24 rotates in the opposite direction to drive the heat-conducting plate 21 to move back, and the positioning blocks 3 can be smoothly removed from the positioning slots 4, thus facilitating the removal of the inverter body 16 by the staff.

[0025] In the example of this application, the transmission assembly includes a rack 26 disposed below the cover plate 13, a gear 25 fixedly mounted in the middle of the bidirectional lead screw 24, and the rack 26 disposed above the gear 25, with the rack 26 meshing with the gear 25.

[0026] As a preferred example of this utility model, when the cover plate 13 is inserted into the top of the housing 1, the cover plate 13 drives the rack 26 to move vertically downwards. The teeth of the rack 26 mesh with the teeth of the gear 25, and the linear motion of the rack 26 is converted into the rotational motion of the gear 25. The gear 25 is fixedly connected to the double-acting lead screw 24, and the rotation of the gear 25 directly drives the double-acting lead screw 24 to rotate synchronously. Since the length of the rack 26 matches the circumference of the gear 25 and the pitch of the double-acting lead screw 24, when the cover plate 13 is fully inserted into the housing 1... When the rack 26 is at its top (i.e., when it moves down to its limit position), the gear 25 rotates to the appropriate number of turns, which in turn drives the bidirectional lead screw 24 to move the heat-conducting plate 21 to the positioning block 3 embedded in the positioning groove 4. The heat-conducting plate 21 drives the positioning block 3 to fit against the inner wall of the housing 1, thus facilitating the conduction of the inverter body 16 to the outer wall of the housing 1. Explosion-proof fans are then added to both sides of the mounting part of the housing 1 to blow away the surface heat of the heat-conducting area of ​​the housing 1, thereby forming an effective heat dissipation for the inverter body 16.

[0027] In the example of this application, the heat-conducting sheet 17, the positioning block 3, the heat-conducting plate 21 and the housing 1 are all made of heat-conducting material, and the surface of the heat-conducting plate 21 is attached to the surface of the heat-conducting sheet 17.

[0028] As a preferred example of this utility model, the heat-conducting sheet 17, the positioning block 3, the heat-conducting plate 21, and the housing 1 are all made of thermally conductive aluminum alloy. The heat generated by the inverter body 16 during operation is first transferred to the heat-conducting sheet 17, which is fixedly connected to its side wall. Because the heat-conducting sheet 17 is made of thermally conductive material, the heat diffuses rapidly within the heat-conducting sheet 17. The heat-conducting plate 21 is in contact with the surface of the heat-conducting sheet 17, and the heat-conducting plate 21 is also made of thermally conductive material. The heat is transferred from the heat-conducting sheet 17 to the heat-conducting plate 21 through thermal conduction. The heat-conducting plate 21 is in contact with the housing 1, which is made of thermally conductive material. The heat is further transferred from the heat-conducting plate 21 to the housing 1. Finally, the heat is exchanged with the outside air through the surface of the housing 1, achieving the outward diffusion of heat. At the same time, the close contact between the heat-conducting plate 21 and the heat-conducting sheet 17 ensures efficient heat conduction and avoids the accumulation of heat inside the inverter body 16.

[0029] In the example of this application, a protective frame 2 is provided on the outside of the heat-conducting sheet 17. The protective frame 2 is fixedly connected to the heat-conducting sheet 17 by welding. The protective frame 2 is provided on the outside of the heat-conducting plate 21.

[0030] As a preferred example of this utility model, the protective frame 2 can provide a certain degree of protection for the heat-conducting plate 21, thereby preventing the heat-conducting plate 21 from being bumped and deformed during transportation.

[0031] In the example of this application, the upper end of the cover plate 13 is provided with first screw holes 14 around all four sides, and the upper end of the box body 1 is provided with second screw holes 15 around all four sides. The first screw holes 14 and the second screw holes 15 are the same size.

[0032] As a preferred example of this utility model, after the cover plate 13 is inserted into place and the inverter is positioned by the transmission assembly, the first screw holes 14 around the upper end of the cover plate 13 are completely aligned with the second screw holes 15 around the upper end of the housing 1. At this time, the bolts are passed through the aligned first screw holes 14 and second screw holes 15, and the bolts are tightened to make the cover plate 13 and the housing 1 tightly connected. The tightening force of the bolts is evenly applied around the cover plate 13, so that the contact surface between the cover plate 13 and the housing 1 forms a sealed state, preventing external impurities from entering the interior of the housing 1, and at the same time enhancing the connection strength between the cover plate 13 and the housing 1.

[0033] In the example of this application, a mounting base 11 is welded to the lower end of the housing 1, and nut seats 12 are welded to all four sides of the lower end of the mounting base 11.

[0034] As a preferred example of this utility model, the mounting base 11 welded to the lower end of the housing 1 provides a flat and stable support surface for the housing 1, facilitating contact installation between the housing 1 and the mounting surface of the explosion-proof locomotive; the nut seats 12 around the lower end of the mounting base 11 correspond one-to-one with the positions of the preset mounting holes of the locomotive. During installation, the bolts are directly threaded through the mounting holes of the locomotive and connected to the nut seats 12, thereby effectively resisting the impact force generated by bumps during the operation of the explosion-proof locomotive, preventing loosening between the housing 1 and the mounting surface of the locomotive, and ensuring the stable operation of the frequency converter.

[0035] In the example of this application, a limiting frame 27 is welded to the upper end of the protective frame 2, and the limiting frame 27 is positioned above the gear 25.

[0036] As a preferred example of this utility model, the setting of the limiting frame 27 can guide the inserted rack 26, thereby ensuring that the rack 26 can be accurately inserted into the gear 25, and thus facilitating the rack 26 to drive the gear 25 to rotate.

[0037] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A frequency converter mounting structure for an explosion-proof electric locomotive, characterized in that... ,include: The housing (1) has an inverter body (16) inside its cavity. The cover plate (13) is movably positioned above the inverter body (16); A heat-conducting plate (17) is fixedly installed on the side wall of the inverter body (16); The positioning heat conduction assembly includes a pair of heat conduction plates (21) disposed on the side of the inverter body (16). A screw sleeve (22) is fixedly installed on the inner side of the heat conduction plate (21). A sliding groove (23) is opened on the outer side of the heat conduction sheet (17). A bidirectional screw (24) is rotatably disposed in the inner cavity of the sliding groove (23). The bidirectional screw (24) is threadedly connected to the screw sleeve (22). A positioning block (3) is fixedly installed on the outer side of the heat conduction plate (21). A positioning groove (4) is opened on the inner wall of the housing (1). The positioning groove (4) is disposed on both sides of the inner cavity of the inverter body (16). The transmission assembly is located below the cover plate (13). The cover plate (13) is inserted into the top of the box body (1) and can drive the bidirectional lead screw (24) to rotate through the transmission assembly, drive the heat conduction plate (21) to move, and make the positioning block (3) insert into the positioning groove (4).

2. The inverter mounting structure for an explosion-proof electric locomotive according to claim 1, characterized in that, There are four positioning blocks (3), and each positioning block (3) corresponds to a positioning groove (4). The size of the positioning block (3) is adapted to the size of the positioning groove (4), and the positioning block (3) and the positioning groove (4) are movably connected.

3. The inverter mounting structure for an explosion-proof electric locomotive according to claim 2, characterized in that, The transmission assembly includes a rack (26) disposed below the cover plate (13), a gear (25) is fixedly installed in the middle of the bidirectional lead screw (24), the rack (26) is disposed at the upper end of the gear (25), and the rack (26) meshes with the gear (25).

4. The inverter mounting structure for an explosion-proof electric locomotive according to claim 3, characterized in that, The heat-conducting sheet (17), positioning block (3), heat-conducting plate (21) and box (1) are all made of heat-conducting material, and the surface of the heat-conducting plate (21) is attached to the surface of the heat-conducting sheet (17).

5. The inverter mounting structure for an explosion-proof electric locomotive according to claim 4, characterized in that, A protective frame (2) is provided on the outside of the heat-conducting sheet (17). The protective frame (2) is fixedly connected to the heat-conducting sheet (17) by welding. The protective frame (2) is provided on the outside of the heat-conducting plate (21).

6. The inverter mounting structure for an explosion-proof electric locomotive according to claim 5, characterized in that, The cover plate (13) has a first screw hole (14) around its upper end, and the box body (1) has a second screw hole (15) around its upper end. The first screw hole (14) and the second screw hole (15) are the same size.

7. The inverter mounting structure for an explosion-proof electric locomotive according to claim 6, characterized in that, The lower end of the housing (1) is welded with a mounting base (11), and the lower end of the mounting base (11) is welded with nut seats (12) around its perimeter.

8. The inverter mounting structure for an explosion-proof electric locomotive according to claim 7, characterized in that, A limiting frame (27) is welded to the upper end of the protective frame (2), and the limiting frame (27) is positioned above the gear (25).

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