A cooling device for a mine explosion-proof frequency converter

Abstract

The utility model discloses an explosion -proof frequency changer cooling device for mine, relates to the technical field of mining equipment. Can solve the heat dissipation problem of explosion -proof frequency changer. Including frequency converter body, combined support, heat dissipation subassembly and fan subassembly, heat dissipation subassembly includes heat conduction plate, a plurality of U type radiators and at least two groups of radiating fin groups, one side of heat conduction plate is directly contacted with frequency converter body, and U type radiator is welded fixed in the other side of heat conduction plate, and the radiating fin is provided with the through -hole corresponding with U type radiator, and the radiating fin is welded fixed on U type radiator through the through -hole, and is provided with the heat dissipation channel between two adjacent radiating fins, and fan subassembly includes axial flow fan, and the air inlet of axial flow fan is set up corresponding to the heat dissipation channel, and combined support is installed in the side portion of frequency converter body, and fan subassembly sets up in the top of combined support, and there is no direct contact with frequency converter body, and heat dissipation subassembly sets up in the inside of combined support. The utility model is applicable to the heat dissipation scene of explosion -proof frequency changer for mine.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a cooling device for an explosion-proof frequency converter used in mining. Background Technology

[0002] With the rapid development of power electronics technology, frequency converters have been widely used and promoted in various industries in recent years due to their superior performance and advantages. Although frequency converters are highly efficient speed control devices, they still incur losses of about 2%-4% during operation. These losses are converted into heat, especially in mining applications. To ensure safety underground, mining frequency converters are installed in explosion-proof enclosures, making it even more difficult to dissipate the heat. How to effectively remove this heat from the explosion-proof enclosure of the frequency converter is a very important issue in the design of mining frequency converters. Utility Model Content

[0003] In view of this, this utility model provides a cooling device for an explosion-proof frequency converter used in mining, which can solve the heat dissipation problem of the explosion-proof frequency converter.

[0004] In a first aspect, this utility model provides a cooling device for a mine explosion-proof frequency converter, including a frequency converter body, and further including: a combined bracket, a heat dissipation assembly, and a fan assembly; the heat dissipation assembly includes a heat-conducting plate, a plurality of U-shaped heat dissipation pipes, and at least two sets of heat dissipation fins; one side of the heat-conducting plate is in direct contact with the frequency converter body, and the U-shaped heat dissipation pipes are welded and fixed to the other side of the heat-conducting plate; each heat dissipation fin of the heat dissipation fin assembly is provided with a through hole corresponding to the U-shaped heat dissipation pipe, and the heat dissipation fin is welded and fixed to the U-shaped heat dissipation pipe through the through hole, and a heat dissipation channel is provided between two adjacent heat dissipation fins, and a gap is provided between two adjacent sets of heat dissipation fins; the fan assembly includes an axial flow fan, and the air inlet of the axial flow fan is provided corresponding to the heat dissipation channel so that heat is drawn into the air inlet from the heat dissipation channel; the combined bracket is installed on the side of the frequency converter body; the fan assembly is located on the top of the combined bracket and is not in direct contact with the frequency converter body, the heat dissipation assembly is located inside the combined bracket, and the heat-conducting plate is in direct contact with the frequency converter body.

[0005] Optionally, at least one U-shaped heat pipe is arranged through two sets of heat dissipation fins.

[0006] Optionally, the combined bracket includes support legs and a hollow support platform, the support legs are fixedly installed at the four corners of the bottom of the support platform, and the combined bracket is made of metal.

[0007] Optionally, the fan assembly further includes a fan base, through which the axial fan is detachably fixed to the support platform.

[0008] Optionally, the fan base includes a metal substrate and a shock-absorbing pad disposed on the bottom surface of the metal substrate.

[0009] Optionally, the bottom surface of the shock-absorbing pad is provided with a textured anti-slip pattern, and the material of the shock-absorbing pad is flexible rubber.

[0010] Optionally, the U-shaped heat dissipation pipe is hollow inside, and the U-shaped heat dissipation pipe, the heat-conducting plate, and the heat dissipation fins are made of metal.

[0011] Optionally, the metallic material includes copper or aluminum.

[0012] Optionally, the heat dissipation fins are stacked and welded to the U-shaped heat dissipation tube parallel to the heat-conducting plate, and bolt holes are provided around the heat-conducting plate at a preset distance from the heat dissipation fins.

[0013] Optionally, the device further includes an explosion-proof housing, which is detachably disposed outside the combined bracket, heat dissipation assembly, and fan assembly.

[0014] The cooling device for explosion-proof frequency converters in mining provided in this embodiment of the utility model has a simple structure. It adopts a heat dissipation structure that combines heat dissipation components and axial flow fans. The heat dissipation components are in direct contact with the explosion-proof frequency converter, transferring the heat generated by the internal electrical components of the frequency converter to the heat dissipation pipes and heat dissipation fins, thereby improving the heat exchange efficiency. At the same time, the axial flow fan extracts the heat, thereby improving the heat dissipation effect. Attached Figure Description

[0015] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a cooling device for a mine explosion-proof frequency converter provided in an embodiment of this utility model; Figure 2 A schematic diagram of a cooling device for a mine explosion-proof frequency converter provided in another embodiment of this utility model. Detailed Implementation

[0017] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] See Figure 1-2 As shown, this utility model provides a cooling device for a mine explosion-proof frequency converter, including a frequency converter body, and further including: a combined bracket 1, a heat dissipation assembly 2, and a fan assembly 3; the heat dissipation assembly 2 includes a heat-conducting plate 21, a plurality of U-shaped heat dissipation pipes 22, and at least two sets of heat dissipation fin groups 23; one side of the heat-conducting plate 21 is in direct contact with the frequency converter body, and the U-shaped heat dissipation pipes 22 are welded and fixed to the other side of the heat-conducting plate; each heat dissipation fin of the heat dissipation fin group 23 is provided with a through hole corresponding to the U-shaped heat dissipation pipe, and the heat dissipation fin is welded and fixed to the fan assembly 3 through the through hole. The U-shaped heat dissipation pipe has a heat dissipation channel between two adjacent heat dissipation fins and a gap between two adjacent heat dissipation fin groups; the fan assembly 3 includes an axial fan, the air inlet of which is arranged corresponding to the heat dissipation channel so that heat is drawn into the air inlet from the heat dissipation channel; the combined bracket 1 is installed on the side of the inverter body; the fan assembly 3 is located on the top of the combined bracket 1 and has no direct contact with the inverter body; the heat dissipation assembly 2 is located inside the combined bracket 1; and the heat conduction plate 21 is in direct contact with the inverter body.

[0020] Specifically, the heat dissipation component 2 provided in this embodiment is in direct contact with the outer shell of the inverter body. Utilizing the heat-conducting plate 21, heat dissipation pipe 22, and heat dissipation fin assembly 23 as a permanent physical barrier, the heat-conducting plate 21 directly contacts the explosion-proof inverter, transferring the heat generated by the internal electrical components of the inverter to the heat dissipation pipe 22 and heat dissipation fin assembly 23. This completely isolates the internal cavity of the inverter from the external mine environment, effectively preventing the intrusion of external explosive gases and dust, and fundamentally eliminating the risk of explosion caused by the heat dissipation path. It also avoids damage to the internal electrical components of the inverter from external humid and corrosive gases. At the same time, the heat dissipation pipe 22 and heat dissipation fin assembly 23 provide a large effective heat exchange area, allowing heat to dissipate from the heat dissipation channel. Combined with the axial flow fan, the heat is evenly extracted from the heat dissipation channel, ensuring that the cooling airflow evenly covers the entire surface of the heat dissipation fins, significantly improving heat dissipation efficiency.

[0021] Optionally, at least one U-shaped heat dissipation pipe 22 is installed through two sets of heat dissipation fins 23. In this way, the originally independent heat dissipation fins 23 are connected into a whole during heat dissipation. The heat dissipation pipe connects the two sets of heat dissipation fins where they do not touch. That is, the heat generated by the frequency converter is transferred to the heat dissipation pipe 22 through the heat conduction plate 21. Some of the heat can be dissipated through the independent heat dissipation pipe 22 and heat dissipation fins, while the other part of the heat can be dissipated to the outside through the surface area of ​​the two sets of fins at the same time, which significantly improves the heat dissipation efficiency of the entire heat dissipation device.

[0022] Optional, see Figure 2 As shown, the combined bracket 1 includes support legs 11 and a hollow support platform 12. The support legs 11 are fixedly installed at the four corners of the bottom of the support platform 12. The combined bracket is made of metal.

[0023] In this embodiment, the heat dissipation component 2 and the fan component 3 are combined and fixed to one side of the inverter body using a combined bracket 1. This places the axial fan at the top and the heat dissipation component 3 at the bottom, ensuring that the air inlet of the axial fan is precisely aligned with the air outlet of the heat dissipation channel. At this point, the axial fan acts like a "chimney," utilizing the natural upward trend of hot air to generate a strong suction force, drawing heat out from the lower heat dissipation channel and forming a vertical airflow. The combined bracket ensures the straightness of this vertical airflow, resulting in a short airflow path and low resistance, thereby maximizing the cooling airflow. Simultaneously, the entire heat dissipation device (combined bracket, heat dissipation component, and fan component) can be installed, disassembled, and maintained as a single unit. When maintenance is required, the entire device can be easily removed from the inverter without touching the core circuitry inside, ensuring maintenance efficiency and safety.

[0024] Optionally, the fan assembly 3 also includes a fan base, through which the axial fan is detachably fixed to the support platform. This facilitates easy replacement and maintenance of the axial fan.

[0025] Optionally, the fan base includes a metal substrate and a shock-absorbing pad disposed on the bottom surface of the metal substrate.

[0026] In this embodiment, the metal substrate is provided with multiple mounting holes for fixing the axial fan to the substrate and the entire fan assembly to the support platform by fasteners. At the same time, the bottom surface of the metal substrate is fixedly embedded or bonded with shock-absorbing pads, which can effectively absorb and dissipate the vibration energy generated when the fan is working, and reduce noise.

[0027] Optionally, the bottom surface of the shock-absorbing pad is provided with a textured anti-slip pattern, and the material of the shock-absorbing pad is a flexible rubber material, such as antistatic and flame-retardant polyurethane.

[0028] In this embodiment, the metal substrate can be made of carbon steel or low-alloy high-strength structural steel, etc. For applications requiring corrosion resistance, an anti-corrosion coating can be sprayed onto the substrate. The shock-absorbing pad can be made of polyurethane, etc. The metal substrate and the shock-absorbing pad work together to achieve explosion protection and shock absorption.

[0029] Optionally, the U-shaped heat sink 22 is hollow inside, and the U-shaped heat sink 22, the heat-conducting plate 21, and the heat dissipation fins are made of metal. The metal material includes copper or aluminum.

[0030] In this embodiment, the U-shaped heat pipe 22 is a hollow tubular structure that can be integrally formed on the heat-conducting plate 21 or detachably and fixedly connected. The U-shaped heat pipe 22, the heat-conducting plate 21, and the heat dissipation fins are all made of thermally conductive metal materials, such as copper or aluminum. The heat-conducting plate contacts the inverter body, and the heat generated by the electrical components inside the inverter is transferred to the heat pipe through the heat-conducting plate. The heat is further transferred to the heat dissipation fins through the heat pipe. The heat is carried out of the inverter through the U-shaped heat pipe, the heat-conducting plate, and the heat dissipation fins. Then, the heat is extracted by the axial fan set at the air outlet of the heat dissipation channel to achieve heat dissipation.

[0031] Optionally, the heat dissipation fins are stacked and welded to the U-shaped heat dissipation pipe parallel to the heat conduction plate. When the heat conduction plate is set close to the frequency converter, the outlet air of the heat dissipation channel can be aligned with the air inlet of the upper axial fan to ensure the generation of a vertical airflow channel. Bolt holes are provided around the heat conduction plate at a preset distance from the heat dissipation fins for fixing the heat dissipation components to the side of the frequency converter.

[0032] Optionally, the device further includes an explosion-proof housing, which is detachably disposed outside the combined bracket, heat dissipation assembly, and fan assembly.

[0033] In this embodiment, the combined bracket, heat dissipation assembly, and fan assembly are also covered with an explosion-proof shell to completely isolate the combined bracket, heat dissipation assembly, and fan assembly from dangerous explosive gases in the mine, such as methane and coal dust, thereby preventing the equipment from causing an explosion in the surrounding environment during operation, and also resisting external impacts.

[0034] In some embodiments, the lower part of the explosion-proof housing is also provided with openings. When the axial fan located above the explosion-proof housing is working, it will generate suction force. After the air inside the housing is drawn out, a negative pressure is formed. External cooling air flows from bottom to top through these openings on the surface of the heat dissipation fins, thereby efficiently removing heat and forming a complete and controllable cooling air duct.

[0035] The thickness of the heat-conducting plate is 20~30mm, and the thickness of the heat dissipation fins is 0.2~0.8mm.

[0036] The cooling device for the explosion-proof frequency converter in mining provided in this embodiment has a simple structure. It adopts a heat dissipation structure that combines heat dissipation components and axial flow fans. The heat dissipation components are in direct contact with the explosion-proof frequency converter, transferring the heat generated by the internal electrical components of the frequency converter to the heat dissipation pipes and heat dissipation fins, thereby improving the heat exchange efficiency. At the same time, the axial flow fan extracts the heat, improving the heat dissipation effect.

[0037] Furthermore, by placing the heat dissipation components and axial fan on the side of the inverter, maintenance costs and workload can be reduced. There is no need to open the inverter; maintenance only requires cleaning a small amount of dust from the outer surface of the heat dissipation fins. Simultaneously, because the internal circulation of the inverter is isolated from the external environment, the heat dissipation performance will not be diminished by the accumulation of external dust, ensuring long-term stable operation of the inverter even under the harsh conditions of high temperature and high dust in mines, and avoiding shutdown failures caused by overheating.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 said element.

[0039] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cooling device for a mine explosion-proof frequency converter, comprising a frequency converter body, characterized in that, Also includes: Combines bracket, heat dissipation assembly, and fan assembly; The heat dissipation assembly includes a heat-conducting plate, a plurality of U-shaped heat dissipation pipes, and at least two sets of heat dissipation fins. One side of the heat-conducting plate is in direct contact with the inverter body, and the U-shaped heat dissipation pipes are welded and fixed to the other side of the heat-conducting plate. Each heat dissipation fin of the heat dissipation fin set has a through hole corresponding to the U-shaped heat dissipation pipe. The heat dissipation fin is welded and fixed to the U-shaped heat dissipation pipe through the through hole, and a heat dissipation channel is provided between two adjacent heat dissipation fins. There is a gap between two adjacent sets of heat dissipation fins. The fan assembly includes an axial fan, the air inlet of which is configured to correspond to the heat dissipation channel, so that heat is drawn from the heat dissipation channel into the air inlet; The combined bracket is installed on the side of the inverter body; the fan assembly is located on the top of the combined bracket and has no direct contact with the inverter body; the heat dissipation assembly is located inside the combined bracket; and the heat conduction plate is in direct contact with the inverter body.

2. The cooling device for the explosion-proof frequency converter in mining according to claim 1, characterized in that, At least one U-shaped heat pipe is arranged through two sets of heat dissipation fins.

3. The cooling device for the explosion-proof frequency converter in mining according to claim 1, characterized in that, The combined bracket includes support legs and a hollow support platform. The support legs are fixedly installed at the four corners of the bottom of the support platform. The combined bracket is made of metal.

4. The cooling device for the explosion-proof frequency converter in mining according to claim 2, characterized in that, The fan assembly also includes a fan base, through which the axial fan is detachably fixed to the support platform.

5. The cooling device for the explosion-proof frequency converter in mining according to claim 4, characterized in that, The fan base includes a metal substrate and a shock-absorbing pad disposed on the bottom surface of the metal substrate.

6. The cooling device for a mine explosion-proof frequency converter according to claim 5, characterized in that, The bottom surface of the shock-absorbing pad is provided with a textured anti-slip pattern, and the material of the shock-absorbing pad is flexible rubber.

7. The cooling device for a mine explosion-proof frequency converter according to claim 1, characterized in that, The U-shaped heat dissipation pipe is hollow inside, and the U-shaped heat dissipation pipe, the heat conduction plate, and the heat dissipation fins are made of metal.

8. The cooling device for a mine explosion-proof frequency converter according to claim 7, characterized in that, The metallic material includes copper or aluminum.

9. The cooling device for a mine explosion-proof frequency converter according to claim 1, characterized in that, The heat dissipation fins are stacked and welded to the U-shaped heat dissipation tube parallel to the heat conduction plate, and bolt holes are provided around the heat conduction plate at a preset distance from the heat dissipation fins.

10. The cooling device for a mine explosion-proof frequency converter according to claim 1, characterized in that, The device further includes an explosion-proof housing, which is detachably disposed outside the combined bracket, heat dissipation assembly, and fan assembly.

Images