A cooling device for a mining high-voltage frequency converter

Abstract

This utility model provides a cooling device for a mining high-voltage frequency converter, including a base, an air inlet duct at the top of the base, a fan at the top of the air inlet duct, a cooling cylinder at the top of the fan, and a spiral tube inside the cooling cylinder. The water inlet end of the spiral tube extends outward from the top of the cooling cylinder, and the water return end of the spiral tube extends outward from one side of the bottom of the cooling cylinder. In this utility model, an electric push rod drives the inner brush assembly and the outer brush assembly to move down and up once, which can perform two cleanings on the outer and inner fins, automatically cleaning dust, reducing manual maintenance costs, and ensuring heat dissipation efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining power equipment, specifically relating to a cooling device for a mining high-voltage frequency converter. Background Technology

[0002] Mining frequency converters refer to frequency converters with explosion-proof functions that are suitable for use in mining environments. They play an important role in promoting intelligent coal mining, improving safe production in coal mines, and contributing to the green development of coal mines. In the existing technology, Chinese utility model patent document CN220475598U discloses a mining frequency converter with a cooling device. This device uses heat dissipation fins and a spiral tube on a water tank to cool water to room temperature before discharging it into the interior of a serpentine tube, thus lowering the temperature inside the casing. The heat dissipation fins on the outside of the water tank can pre-cool the water. However, coal mining environments contain a lot of dust. Dust adhering to the surface of the heat dissipation fins and spiral tubes obstructs airflow, reduces heat dissipation efficiency, and causes the internal temperature of the frequency converter to rise. Regular manual cleaning of the surface dust is required, resulting in high labor costs.

[0003] Therefore, it is necessary to design a cooling device for mining high-voltage frequency converters that can automatically clean dust, reduce manual maintenance costs, and ensure heat dissipation efficiency to solve the current technical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a cooling device for mining high-voltage frequency converters that can automatically clean dust, reduce manual maintenance costs, and ensure heat dissipation efficiency.

[0005] The technical solution of this utility model is as follows: a cooling device for a mining high-voltage frequency converter, including a base, an air inlet duct at the top of the base, a fan at the top of the air inlet duct, a cooling cylinder at the top of the fan, a spiral tube inside the cooling cylinder, a water inlet end of the spiral tube extending outward from the top of the cooling cylinder, and a water return end of the spiral tube extending outward from one side of the bottom of the cooling cylinder; inner fins are arranged in a circumferential array on the inner side of the cooling cylinder, and outer fins are arranged in a circumferential array on the outer side of the cooling cylinder, both the inner and outer fins being parallel to the axis of the cooling cylinder; an air outlet corresponding to the inner and outer fins is provided at the top of the fan; an inner brush assembly for cleaning the inner fins is provided inside the cooling cylinder, and an outer brush assembly for cleaning the outer fins is fitted on the outside of the cooling cylinder; electric push rods for driving the inner and outer brush assemblies to reciprocate along the axial direction of the cooling cylinder are symmetrically arranged on both sides of the base.

[0006] Furthermore, the inner brush assembly has an inner brush support ring, and an inner brush ring is detachably and fixedly provided on the top of the inner brush support ring. The outer side of the inner brush ring is provided with inner brush bristles corresponding to the gap of the inner fins. The outer brush assembly has an outer brush support ring, and an outer brush ring is detachably and fixedly provided on the top of the outer brush support ring. The outer side of the outer brush ring is provided with outer brush bristles corresponding to the gap of the outer fins.

[0007] Furthermore, the bottom end of the electric actuator is fixedly disposed on one side of the base, the other end of the electric actuator is fixedly connected to the outer brush support ring, an outer hanger is fixedly disposed on the top of the outer brush support ring, an inner hanger is fixedly disposed on the top of the inner brush support ring, and a horizontal plate is disposed between the top ends of the inner hanger and the outer hanger.

[0008] Furthermore, both the inner brush ring and the outer brush ring are composed of two semi-circular rings joined together.

[0009] Furthermore, the inner brush ring is detachably fixed to the top of the inner brush support ring by bolts; the outer brush ring is detachably fixed to the top of the outer brush support ring by bolts.

[0010] Furthermore, the cooling cylinder has an annular cavity inside its wall, and the spiral tube is fixedly spirally disposed inside the annular cavity. The cooling cylinder is a copper cylindrical structure, and the spiral tube is a copper spiral tube.

[0011] Furthermore, the air inlet duct is provided with strip-shaped air inlet holes evenly distributed around its perimeter.

[0012] The beneficial effects of this utility model are:

[0013] (1) In this utility model, the water inlet is connected to the water outlet of the heat exchange mechanism inside the inverter through a pipeline, and the return water pipe is connected to the water inlet of the heat exchange mechanism inside the inverter through a pipeline and a water pump. The heat exchange mechanism inside the inverter absorbs the heat generated during the operation of the inverter, and transfers the heat to the cooling cylinder through the cooling water circulation, and dissipates it outward through the outer fins and inner fins.

[0014] (2) The fan drives the external air to enter through the strip-shaped air inlet around the air inlet cylinder, and flows upward from the top of the fan to the outside of the outer and inner fins, thus facilitating the airflow outside the outer and inner fins and improving the heat dissipation efficiency.

[0015] (3) The electric push rod drives the inner brush assembly and the outer brush assembly to move down and up once, which can clean the outer fins and the outer side of the inner fins twice, automatically cleaning the dust, reducing manual maintenance costs, and ensuring heat dissipation efficiency. Attached Figure Description

[0016] Figure 1This is one of the structural schematic diagrams of the cooling device for the mining high-voltage frequency converter in this utility model.

[0017] Figure 2 This is the second schematic diagram of the cooling device for the mining high-voltage frequency converter in this utility model. Detailed Implementation

[0018] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0019] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figure 1 and 2As shown, a cooling device for a mining high-voltage frequency converter is disclosed, including a base 1, an air inlet duct 2 at the top of the base 1, a fan 3 at the top of the air inlet duct 2, and a cooling cylinder 4 at the top of the fan 3. A spiral tube (not shown in the figure) is installed inside the cooling cylinder 4. The water inlet end 41 of the spiral tube extends outward from the top of the cooling cylinder 4, and the water return end 42 extends outward from one side of the bottom of the cooling cylinder 4. The inner side of the cooling cylinder 4 has an inner fin array 44 arranged in a circular pattern. The outer side of the cooling cylinder 4 is arranged in a circumferential array with outer fins 43. Both the inner fins 44 and the outer fins 43 are parallel to the axis of the cooling cylinder 4. The top of the fan 3 is provided with an air outlet corresponding to the inner fins 44 and the outer fins 43. The interior of the cooling cylinder 4 is provided with an inner brush assembly 5 for cleaning the inner fins 44, and the exterior of the cooling cylinder 4 is fitted with an outer brush assembly 6 for cleaning the outer fins 43. The base 1 is symmetrically provided with electric push rods 7 on both sides to drive the inner brush assembly 5 and the outer brush assembly 6 to reciprocate along the axis of the cooling cylinder 4. In this embodiment, the water inlet 41 is connected to the water outlet of the internal heat exchange mechanism of the frequency converter via a pipeline, and the return water pipe 42 is connected to the water inlet of the internal heat exchange mechanism of the frequency converter via a pipeline and a water pump. The internal heat exchange mechanism of the frequency converter absorbs the heat generated during the operation of the frequency converter, and transfers the heat to the cooling cylinder 4 through cooling water circulation, and dissipates it outward through the outer fins 43 and inner fins 44; the fan 3 drives the external air to enter through the strip-shaped air inlet holes 21 around the air inlet cylinder 2, and flows upward from the top of the air inlet cylinder 2 to the outer fins 43 and inner fins 44. On the outer side of the inner fin 44, airflow is supported between the outer fin 43 and the inner fin 44, improving heat dissipation efficiency. The electric push rod 7 drives the inner brush assembly 5 and the outer brush assembly 6 to move down and up once, which can clean the outer side of the outer fin 43 and the inner fin 44 twice, automatically cleaning dust, reducing manual maintenance costs, and ensuring heat dissipation efficiency. In the heat dissipation state, the inner brush assembly 5 and the outer brush assembly 6 remain at the upper end of the cooling cylinder 4 to reduce obstruction of airflow to the outer side of the outer fin 43 and the inner fin 44.

[0021] In some embodiments, the inner brush assembly 5 has an inner brush support ring 53, and an inner brush ring 51 is detachably fixed to the top of the inner brush support ring 53. The outer side of the inner brush ring 51 is provided with inner brush bristles 52 corresponding to the gap of the inner fin 44. The outer brush assembly 6 has an outer brush support ring 63, and an outer brush ring 61 is detachably fixed to the top of the outer brush support ring 63. The outer side of the outer brush ring 61 is provided with outer brush bristles 62 corresponding to the gap of the outer fin 43. The detachable design of the inner brush ring 51 and the outer brush ring 61 facilitates replacement when the brush bristles wear down.

[0022] In some embodiments, the bottom end of the electric push rod 7 is fixedly disposed on one side of the base 1, and the other end of the electric push rod 7 is fixedly connected to the outer brush support ring 63. An outer hanging rod 72 is fixedly disposed on the top of the outer brush support ring 63, and an inner hanging rod 71 is fixedly disposed on the top of the inner brush support ring 53. A horizontal plate 73 is disposed between the top ends of the inner hanging rod 71 and the outer hanging rod 72. When cleaning the inner fins 44 and the outer fins 43, the electric push rod 7 drives the outer brush support ring 63 to move. The outer brush support ring 63 drives the inner brush support ring 53 to move through the outer hanging rod 72, the horizontal plate 73, and the inner hanging rod 71, thereby cleaning the outer fins 43 and the inner fins 44.

[0023] In some embodiments, the inner brush ring 51 and the outer brush ring 61 are both made of two semi-circular rings spliced ​​together; this avoids interference between the inner hanger 71 and the outer hanger 72 during disassembly and replacement, making disassembly convenient.

[0024] In some embodiments, the inner brush ring 51 is detachably fixed to the top of the inner brush support ring 53 by bolts; the outer brush ring 61 is detachably fixed to the top of the outer brush support ring 63 by bolts.

[0025] In some embodiments, the cooling cylinder 4 has an annular cavity inside its cylinder wall, and a spiral tube is fixedly arranged inside the annular cavity. The cooling cylinder 4 is a copper cylindrical structure, and the spiral tube is a copper spiral tube.

[0026] In some embodiments, strip-shaped air inlets 21 are evenly arranged around the air inlet duct 2.

[0027] The fan 3 in the above embodiment has a cylinder that is fixedly connected to the air inlet duct 2, and the main body of the fan 3 is mounted inside the cylinder.

[0028] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0029] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cooling device for a mining high-voltage frequency converter, characterized in that: The device includes a base, an air inlet duct at the top of the base, a fan at the top of the air inlet duct, a cooling cylinder at the top of the fan, a spiral tube inside the cooling cylinder with its water inlet extending outward from the top of the cooling cylinder and its water return extending outward from one side of the bottom of the cooling cylinder; inner fins arranged in a circumferential array on the inner side of the cooling cylinder and outer fins arranged in a circumferential array on the outer side of the cooling cylinder, both the inner and outer fins being parallel to the axis of the cooling cylinder; an air outlet corresponding to the inner and outer fins at the top of the fan; an inner brush assembly for cleaning the inner fins inside the cooling cylinder and an outer brush assembly for cleaning the outer fins fitted on the outside of the cooling cylinder; and electric actuators symmetrically arranged on both sides of the base to drive the inner and outer brush assemblies to reciprocate along the axial direction of the cooling cylinder.

2. The cooling device for the mining high-voltage frequency converter according to claim 1, characterized in that: The inner brush assembly has an inner brush support ring, and an inner brush ring is detachably fixed to the top of the inner brush support ring. The outer side of the inner brush ring is provided with inner brush bristles corresponding to the gap of the inner fins. The outer brush assembly has an outer brush support ring, and an outer brush ring is detachably fixed to the top of the outer brush support ring. The outer brush ring has outer brush bristles on its outer side that correspond to the gap between the outer fins.

3. The cooling device for the mining high-voltage frequency converter according to claim 2, characterized in that: The bottom end of the electric actuator is fixedly installed on one side of the base, and the other end of the electric actuator is fixedly connected to the outer brush support ring. An outer hanger is fixedly installed on the top of the outer brush support ring, and an inner hanger is fixedly installed on the top of the inner brush support ring. A horizontal plate is provided between the top ends of the inner hanger and the outer hanger.

4. The cooling device for the mining high-voltage frequency converter according to claim 2, characterized in that: Both the inner and outer brush rings are composed of two semi-circular rings joined together.

5. The cooling device for the mining high-voltage frequency converter according to claim 2, characterized in that: The inner brush ring is detachably and fixedly mounted on the top of the inner brush support ring by bolts; the outer brush ring is detachably and fixedly mounted on the top of the outer brush support ring by bolts.

6. The cooling device for the mining high-voltage frequency converter according to claim 1, characterized in that: The cooling cylinder has an annular cavity inside its wall, and the spiral tube is fixedly spirally disposed inside the annular cavity. The cooling cylinder is a copper cylindrical structure, and the spiral tube is a copper spiral tube.

7. The cooling device for the mining high-voltage frequency converter according to claim 1, characterized in that: The air inlet duct is provided with strip-shaped air inlets evenly distributed around its perimeter.

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