Mining explosion-proof frequency converter box
By designing a small explosion-proof enclosure and cooling system, the sealing and heat dissipation problems of explosion-proof frequency converters in underground coal mine tunnels were solved, enabling safe and stable operation in confined environments.
Patent Information
- Application Number
- CN202521141772.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-06-05
AI Technical Summary
Existing explosion-proof frequency converters for mining have large enclosures and poor sealing, making them unsuitable for the narrow environment of underground coal mine tunnels. Furthermore, the ventilation holes make the explosion-proof frequency converters susceptible to high humidity air, reducing safety.
A small explosion-proof enclosure was designed, which incorporates a symmetrical inverter mounting assembly and a sealing cover. Combined with a heat pipe cooling system, the cover and liner are made of transparent material to achieve sealing and cooling, and the temperature is reduced by circulating cooling water.
The explosion-proof frequency converter has improved sealing and safety, adapts to the narrow underground environment, stabilizes temperature through the cooling system, and enhances the reliability of equipment operation.
Smart Images
Figure CN224684091U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical explosion-proof boxes, and in particular to a mining explosion-proof frequency converter box. Background Technology
[0002] During underground operations in coal mining, various equipment such as ventilation systems, transfer equipment, and water pumps need to be installed in coal mine tunnels. The explosion-proof frequency converters that drive these devices and control their frequencies are all installed in mine-use explosion-proof frequency converter boxes to ensure circuit stability and safety within the coal mine tunnels.
[0003] During the mining process in underground coal mines, the tunnels are relatively narrow. After installing multiple different pieces of equipment, the tunnels become even narrower. In addition, there is a lot of dust in the underground coal mine tunnels, so water mist needs to be sprayed to suppress the dust, resulting in high humidity inside the tunnels. Existing explosion-proof frequency converter boxes for mining use have single-sided cabinet doors and are larger in size, making them unsuitable for installation in narrow underground coal mine tunnels. Furthermore, existing explosion-proof frequency converter boxes for mining use use ventilation holes for heat dissipation, which reduces the overall sealing performance and makes it easy for high humidity air to damage the explosion-proof frequency converter. At the same time, poor sealing performance also reduces the safety of explosion-proof frequency converter boxes for mining. Utility Model Content
[0004] This utility model provides a mine explosion-proof frequency converter box, which is small in size and can accommodate multiple mine explosion-proof frequency converters. It has a good sealing effect and is suitable for installation and use in narrow places in underground coal mine tunnels.
[0005] To achieve the above objectives, this utility model provides a mine explosion-proof frequency converter box, comprising: An explosion-proof enclosure, wherein a through-hole mounting chamber is provided at the center of the explosion-proof enclosure; A support stand is provided at the bottom of the explosion-proof enclosure; A frequency converter mounting assembly is provided, wherein multiple frequency converter mounting assemblies are symmetrically arranged at the center of the mounting chamber. Each frequency converter mounting assembly includes a frequency converter mounting plate and multiple auxiliary fixing plates. The auxiliary fixing plates are L-shaped. One end of each of the multiple auxiliary fixing plates is fixed to the four corners of the frequency converter mounting plate by bolts, and the other end of each of the multiple auxiliary fixing plates is fixed to the inner wall of the mounting chamber by bolts. First wiring hole, a plurality of first wiring holes are arranged at the bottom of the mounting chamber and penetrate the explosion-proof enclosure; A cooling assembly includes an inlet pipe, a heat pipe, and an outlet pipe. A plurality of heat pipes are arranged in the gap between the two inverter mounting assemblies, and both ends of the heat pipes penetrate the mounting chamber. One end of the plurality of heat pipes is connected to the inlet pipe, and the other end of the plurality of heat pipes is connected to the outlet pipe. Guide posts, a plurality of the guide posts are disposed on the explosion-proof enclosure near the openings on both sides of the mounting chamber; An explosion-proof cover plate is provided on both sides of the installation chamber of the explosion-proof enclosure via the guide posts.
[0006] Furthermore, a sliding mounting opening is provided on one side of the explosion-proof enclosure, and the sliding mounting groove is symmetrically arranged on the inner wall of the mounting chamber. The sliding mounting opening communicates with the sliding mounting groove, and the sliding mounting groove is located on one side of the inverter mounting assembly away from the center of the mounting chamber.
[0007] Furthermore, the mining explosion-proof frequency converter box also includes an internal liner, which includes an explosion-proof liner and a pressing side plate. The explosion-proof liner is perpendicular to the pressing side plate, and the explosion-proof liner is slidably disposed in the sliding mounting groove, with the pressing side plate close to the sliding mounting opening.
[0008] Furthermore, both the explosion-proof cover and the explosion-proof liner are made of transparent material.
[0009] Furthermore, one end of the guide post is threaded.
[0010] Furthermore, locking holes are provided at the four corners of the explosion-proof cover plates. The locking holes of the explosion-proof cover plates pass through the guide posts and are fastened with nuts. A switch placement plate is provided on one side of the explosion-proof cover plate, and multiple control switches are provided on the switch placement plate.
[0011] Furthermore, the mining explosion-proof frequency converter box also includes a second wiring hole, and a plurality of the second wiring holes are arranged on the side wall of the explosion-proof box and communicate with the first wiring hole.
[0012] Compared with the prior art, the explosion-proof frequency converter box for mining according to an embodiment of the present invention provides a symmetrical frequency converter mounting assembly in the mounting chamber of the explosion-proof box, which increases the number of explosion-proof frequency converters that can be installed. At the same time, the installation chamber is sealed by setting an explosion-proof cover plate to prevent the multiple explosion-proof frequency converters in the installation chamber from being affected by the high humidity of the outside air, thereby improving the overall explosion-proof safety. Furthermore, multiple heat-conducting pipes are installed in the installation chamber, which can absorb heat in the installation chamber. Cooling water flows inside the heat-conducting pipes, and the flow of cooling water will carry away the heat from the pipe walls, thereby cooling down the temperature in the installation chamber and stabilizing the operating environment temperature of multiple explosion-proof frequency converters. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of a mine explosion-proof frequency converter box according to the present invention; Figure 2 This is a schematic diagram of the structure of a mining explosion-proof frequency converter box without an explosion-proof cover plate installed on one side; Figure 3 This is a partial sectional view of the side structure of a mine explosion-proof frequency converter box according to the present invention; and Figure 4 This is a structural schematic diagram of a built-in liner in a mine explosion-proof frequency converter box according to the present invention.
[0014] Figure label: 1000. Explosion-proof enclosure; 1100. Mounting chamber; 1110. Sliding mounting port; 1120. Sliding mounting groove; 1200. Guide post; 2000. Support stand; 3100. Inverter mounting plate; 3200. Auxiliary mounting plate; 4100. First wiring hole; 4200. Second wiring hole; 5100. Water inlet pipe; 5200. Heat conduction pipe; 5300. Water outlet pipe; 6000. Explosion-proof cover; 6100. Switch placement plate; 6110. Control switch; 7000. Built-in liner; 7100. Explosion-proof liner; 7200. Pressing side plate. Detailed Implementation
[0015] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.
[0016] like Figures 1-4 As shown, a mine explosion-proof frequency converter box provided according to an embodiment of the present utility model includes... Explosion-proof enclosure 1000, bracket stand 2000, frequency converter mounting assembly, first wiring hole 4100, second wiring hole 4200, cooling assembly, guide column 1200 and explosion-proof cover plate 6000; An explosion-proof enclosure 1000 has a through-hole installation chamber 1100 at its center. A support base 2000 is located at the bottom of the explosion-proof enclosure 1000. Multiple frequency converter installation components are symmetrically arranged at the center of the installation chamber 1100. The frequency converter installation components include a frequency converter mounting plate 3100 and multiple auxiliary fixing plates 3200. The auxiliary fixing plates 3200 are L-shaped. One end of each of the multiple auxiliary fixing plates 3200 is fixed to the four corners of the frequency converter mounting plate 3100 by bolts. The other end of each of the multiple auxiliary fixing plates 3200 is fixed to the inner wall of the installation chamber 1100 by bolts. Multiple first wiring holes 4100 are arranged at the bottom of the mounting chamber 1100 and penetrate the explosion-proof enclosure 1000, and multiple second wiring holes 4200 are arranged on the side wall of the explosion-proof enclosure 1000 and communicate with the first wiring holes 4100. The cooling assembly includes an inlet pipe 5100, a heat pipe 5200, and an outlet pipe 5300. Multiple heat pipes 5200 are arranged in the gap between the two inverter mounting assemblies, and both ends of the heat pipes 5200 penetrate the mounting chamber 1100. One end of the multiple heat pipes 5200 is connected to the inlet pipe 5100, and the other end of the multiple heat pipes 5200 is connected to the outlet pipe 5300. Multiple guide posts 1200 are installed on the explosion-proof enclosure 1000 at the openings on both sides near the installation chamber 1100, and the explosion-proof cover 6000 is installed on the explosion-proof enclosure 1000 via the guide posts 1200. When installing the explosion-proof frequency converter box for mining, the user first needs to fix multiple auxiliary fixing plates 3200 into the installation chamber 1100, and then fix the frequency converter mounting plate 3100 onto the auxiliary fixing plates 3200, thereby stably fixing the frequency converter mounting plate 3100 into the installation chamber 1100. At this time, there are heat conduction pipes 5200 arranged between the frequency converter mounting plates 3100 on both sides. After the installation of the frequency converter mounting plate 3100 is completed, the user can install multiple explosion-proof frequency converters onto the two frequency converter mounting plates 3100 in a regular manner. At this time, the user inserts the wire ends of the main circuit and equipment control circuit into the installation chamber 1100 through the first wiring hole 4100 and connects them to the explosion-proof frequency converter in sequence. After the explosion-proof frequency converter is connected to the equipment, the user inserts the explosion-proof cover plate 6000 into the guide post 1200 and locks it with a nut, so that the explosion-proof cover plate 6000 seals the installation chamber 1100. When multiple explosion-proof frequency converters in the mine explosion-proof frequency converter box of this utility model are in working condition, cooling water is sent from the outside through the water inlet pipe 5100 into multiple heat conduction pipes 5200. The heat conduction pipes 5200 are made of materials with good thermal conductivity, so the heat conduction pipes 5200 can conduct heat from the installation chamber 1100 to the pipe wall of the heat conduction pipes 5200. When the cooling water flows through the heat conduction pipes 5200, the cooling water will absorb the temperature of the pipe wall of the heat conduction pipes 5200, thereby reducing the temperature in the installation chamber 1100. The cooling water that has absorbed superheated water finally gathers in the water outlet pipe 5300 and is sent into the water mist dust suppression system, and then the water mist dust suppression system sprays out water mist to reduce the dust in the underground coal mine tunnel, thereby realizing the recycling of water.
[0017] Furthermore, such as Figure 2 As shown, a sliding mounting port 1110 is provided on one side of the explosion-proof enclosure 1000, and a sliding mounting groove 1120 is symmetrically arranged on the inner wall of the mounting chamber 1100. The sliding mounting port 1110 communicates with the sliding mounting groove 1120, and the sliding mounting groove 1120 is located on one side of the inverter mounting assembly away from the center of the mounting chamber 1100.
[0018] Furthermore, such as Figure 1 , Figure 2 and Figure 4 As shown, the mining explosion-proof frequency converter box also includes an internal liner 7000, which includes an explosion-proof liner 7100 and a pressing side plate 7200. The explosion-proof liner 7100 is perpendicular to the pressing side plate 7200. The explosion-proof liner 7100 is slidably disposed in the sliding mounting groove 1120, and the pressing side plate 7200 is close to the sliding mounting opening 1110. To prevent air containing high humidity from entering the installation chamber 1100 through the explosion-proof cover 6000, a sliding installation groove 1120 and an internal liner are provided in the installation chamber 1100. During installation, the internal liner needs to be rotated into the sliding installation groove 1120 to achieve secondary sealing. The explosion-proof liner 7100 is inserted into the sliding installation groove 1120 through the sliding installation port 1110, so that the pressing side plate 7200 contacts the sliding installation port 1110. At this time, a sealing rubber gasket is provided on one side of the pressing side plate 7200, so that the sealing rubber gasket contacts the sliding installation port 1110, thereby sealing the installation chamber 1100.
[0019] Furthermore, both the explosion-proof cover plate 6000 and the explosion-proof liner plate 7100 are made of transparent materials. For example, both the explosion-proof cover plate 6000 and the explosion-proof liner plate 7100 are made of transparent PVC explosion-proof panels, which allows personnel to directly see the working status and numerical display of multiple explosion-proof frequency converters in the installation chamber 1100.
[0020] Furthermore, one end of the guide post 1200 is threaded.
[0021] Furthermore, locking holes are provided at the four corners of multiple explosion-proof covers 6000. The locking holes of the explosion-proof covers 6000 pass through the guide post 1200 and are fastened by bolts. A switch placement plate 6100 is provided on one side of the explosion-proof covers 6000, and multiple control switches 6110 are provided on the switch placement plate 6100.
[0022] Furthermore, such as Figure 1 , Figure 2 and Figure 3 As shown, the mine explosion-proof frequency converter box also includes a second wiring hole 4200. Multiple second wiring holes 4200 are arranged on the side wall of the explosion-proof enclosure 1000 and communicate with the first wiring hole 4100. To facilitate adjustment of the operating status of multiple explosion-proof frequency converters within the installation chamber 1100, when installing the explosion-proof frequency converter, one end of the control line is inserted through the second wiring hole 4200 and passes through the first wiring hole 4100 into the installation chamber 1100. Then, one end of the control line is connected to the multiple explosion-proof frequency converters on the frequency converter mounting plate 3100, and the other end of the control line is connected to the control switch 6110. This allows the user to directly control the control switch 6110 to change the operating parameters of the explosion-proof frequency converter without requiring personnel to repeatedly disassemble the explosion-proof cover 6000.
[0023] Preferably, sealant is applied to both the first wiring hole 4100 and the second wiring hole 4200. After the overall wiring is installed and tested, the sealant is filled into the first wiring hole 4100 and the second wiring hole 4200 to ensure a sealed environment within the installation chamber 1100.
[0024] In the description of this utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" and their orientation or positional relationships are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.
[0025] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.
Claims
1. A mine explosion-proof frequency converter box, characterized in that, include An explosion-proof enclosure, wherein a through-hole mounting chamber is provided at the center of the explosion-proof enclosure; A support stand is provided at the bottom of the explosion-proof enclosure; A frequency converter mounting assembly is provided, wherein multiple frequency converter mounting assemblies are symmetrically arranged at the center of the mounting chamber. Each frequency converter mounting assembly includes a frequency converter mounting plate and multiple auxiliary fixing plates. The auxiliary fixing plates are L-shaped. One end of each of the multiple auxiliary fixing plates is fixed to the four corners of the frequency converter mounting plate by bolts, and the other end of each of the multiple auxiliary fixing plates is fixed to the inner wall of the mounting chamber by bolts. First wiring hole, a plurality of first wiring holes are arranged at the bottom of the mounting chamber and penetrate the explosion-proof enclosure; A cooling assembly includes an inlet pipe, a heat pipe, and an outlet pipe. A plurality of heat pipes are arranged in the gap between the two inverter mounting assemblies, and both ends of the heat pipes penetrate the mounting chamber. One end of the plurality of heat pipes is connected to the inlet pipe, and the other end of the plurality of heat pipes is connected to the outlet pipe. Guide posts, a plurality of the guide posts are disposed on the explosion-proof enclosure near the openings on both sides of the mounting chamber; An explosion-proof cover plate is provided on both sides of the installation chamber of the explosion-proof enclosure via the guide posts.
2. The explosion-proof frequency converter box for mining according to claim 1, characterized in that, A sliding mounting opening is provided on one side of the explosion-proof enclosure, and sliding mounting slots are symmetrically arranged on the inner wall of the mounting chamber. The sliding mounting opening communicates with the sliding mounting slots, and the sliding mounting slots are located on one side of the inverter mounting assembly away from the center of the mounting chamber.
3. The explosion-proof frequency converter box for mining according to claim 2, characterized in that, It also includes a built-in liner, which includes an explosion-proof liner and a pressing side plate. The explosion-proof liner is perpendicular to the pressing side plate. The explosion-proof liner is slidably disposed in the sliding mounting groove, and the pressing side plate is close to the sliding mounting opening.
4. The explosion-proof frequency converter box for mining according to claim 3, characterized in that, Both the explosion-proof cover and the explosion-proof liner are made of transparent material.
5. The explosion-proof frequency converter box for mining according to claim 1, characterized in that, One end of the guide post is threaded.
6. The explosion-proof frequency converter box for mining according to claim 5, characterized in that, Locking holes are provided at the four corners of the explosion-proof cover plates. The locking holes of the explosion-proof cover plates pass through the guide posts and are fastened with nuts. A switch placement plate is provided on one side of the explosion-proof cover plate, and multiple control switches are provided on the switch placement plate.
7. The explosion-proof frequency converter box for mining according to claim 1, characterized in that, It also includes a second wiring hole, and a plurality of the second wiring holes are arranged on the side wall of the explosion-proof enclosure and communicate with the first wiring hole.