Refrigeration equipment special for refrigerant-free mine

Abstract

The invention discloses refrigeration equipment special for a refrigerant-free mine, and relates to the field of underground refrigeration equipment, the refrigeration equipment comprises a box body, the two ends of the box body are connected with conical covers respectively, the conical covers are connected with noise reduction connectors, a partition plate is arranged in the middle of a cavity of the box body, a plurality of vortex refrigeration devices are installed on the partition plate, and the partition plate divides the cavity into a left cavity and a right cavity; wherein one cavity is provided with a plurality of air path pressure equalizing pipes, high-pressure air enters the vortex refrigerating device through the air path pressure equalizing pipes to generate cold air flow and hot air flow, the cold air flow enters the working environment from the noise reduction connector at one end, and the hot air flow is guided into the water cooler from the noise reduction connector at the other end to be released; the gas path pressure equalizing pipe, the vortex refrigerating device and the partition plate form a refrigerating system; and the box body, the conical cover and the noise reduction joint adopt a noise reduction structure to form a sound insulation and noise reduction system. The vortex refrigeration technology, the hollow structure heat insulation and sound insulation technology and the sound wave interference noise reduction technology are adopted for manufacturing the high-flow refrigeration equipment which is free of electricity and low in noise, and the cooling requirement of a mine is met.

Description

Technical Field

[0001] The present invention relates to the field of underground refrigeration equipment, in particular to a special refrigeration device for mines without refrigerant. Background Art

[0002] Coal accounts for 68% of my country's primary energy, making it a pillar of national development. With the depletion of shallow coal resources, coal mining has expanded to depths of up to a thousand meters, exacerbating heat damage in mines and necessitating the continued development of mine cooling technology. Current examples of this technology include the "mine air conditioner" developed by Gree in collaboration with Pingmei Shenma Group, the ZLF-450 chiller at Huayuan Coal Mine, Dekuang Jiuding's explosion-proof refrigeration system for mines, and multiple projects by Huaihe Energy Holding Group. These cases cover diverse technologies, including vapor compression, air refrigeration, and novel transcritical CO2 technology. Gree's case demonstrates the application of vapor compression refrigeration in deep mines, while Dekuang Jiuding's equipment emphasizes explosion-proof design and high-efficiency cooling. Huaihe Energy's project involves combined heat, power, and cooling (CHPC) and CO2 refrigeration, demonstrating the integrated application of multiple technologies. Gree's equipment uses R134A refrigerant, as does Dekuang Jiuding's. While Huaihe Energy's transcritical CO2 technology is environmentally friendly, it still relies on refrigerant, which carries the risk of leakage and relies on electricity. In this context, vortex tube refrigeration technology has been proposed for underground cooling. However, due to the lack of a comprehensive technical solution to address the limitations of vortex tubes, such as their low cooling capacity and high noise levels, it has not been able to truly improve the working environment. Research has shown that due to these shortcomings in current cooling solutions, many high-temperature mines do not have cooling devices installed. Summary of the Invention

[0003] Based on the extremely high safety requirements of mines, the present invention provides a low-noise, high-flow, refrigerant-free mine-specific refrigeration equipment for cooling the mine space through a purely mechanical structure, relying only on compressed air.

[0004] The technical solution of the present invention is: A refrigerant-free refrigeration device specifically for mines includes a box body, with conical covers connected to both ends of the box body, and the conical covers are connected to noise reduction joints; a partition plate is provided in the middle of the box body cavity, and multiple vortex refrigeration devices are installed on the partition plate. The partition plate divides the cavity into two left and right chambers, one of which is provided with multiple air path equalizing pipes. After high-pressure air enters the vortex refrigeration device through the air path equalizing pipe, it generates cold and hot air flows. The cold air flow enters the working environment from the noise reduction joint at one end, and the hot air flow is introduced into the water cooler from the noise reduction joint at the other end and then discharged; the air path equalizing pipe, vortex refrigeration device and partition plate constitute a refrigeration system; the box body, conical cover and noise reduction joint all adopt a hollow noise reduction structure to constitute a sound insulation and noise reduction system; The box body and the cylindrical wall of the hollow conical cover are both composed of double-layer plates, and the double-layer plates include an inner plate and an outer plate. The two plates are parallel and separated by supports to form a hollow wall of fixed thickness; Furthermore, the cone angle of the conical cover is less than 90 degrees; The noise reduction joint includes an inner tube, an outer tube, a flange connection plate, a plugging plate, an inlet flow control plate, an intermediate flow control plate, and an outlet flow control plate. The inner and outer tubes are coaxially fixed by plugging plates and flange connection plates at both ends to form a hollow structure. The inlet flow control plate, intermediate flow control plate, and outlet flow control plate are respectively fixed perpendicularly to the axis at both ends and the middle of the inner tube. The three cross sections are staggered 180 degrees along the circumferential direction. Furthermore, the three partition plates adopt tangential notches, and the blocked area is greater than 50% of the cross-sectional area of ​​the location.

[0005] The partition plate includes a left partition plate and a right partition plate that are parallel to each other, and a plurality of support sleeves arranged between the left partition plate and the right partition plate. The peripheries of the two plates are fixedly connected to the inner plate of the box body. A plurality of through holes are provided on the planes of the two plates that are parallel to each other, and the support sleeves are coaxially arranged with the through holes. One of the chambers of the box is provided with a plurality of gas path pressure equalizing pipes, which pass through the front and rear hollow walls and are fixed with nuts; one end of the gas path pressure equalizing pipe is closed and communicates only with the pressure gauge, and the other end is connected to the gas source through a valve, and the pipe body located in the inner cavity of the box is provided with a plurality of gas pipe connection holes; The vortex refrigeration device includes a vortex generator, an air flow pipe and a hot gas flow valve; the air flow pipe passes through the partition plate through the support sleeve hole of the partition plate and is fixed, one end of the air flow pipe located in the cavity where the gas path pressure equalizing pipe is located is connected to the vortex generator, and the other end is connected to the hot gas flow valve; the vortex generator is connected to the gas path pressure equalizing pipe through the air pipe; The water cooler is connected to the hot end noise reduction joint through an air pipe.

[0006] The sound insulation and noise reduction system blocks the propagation of airflow sound waves through the hollow cylinder wall of the box, conical cover and noise reduction joint. After being reflected by the inner plate of the conical cover, the sound waves interfere with each other for the first time. After being forced to turn, they interfere with the noise reduction joint again for multiple times, causing the sound wave intensity to be greatly attenuated to achieve silencing and noise reduction.

[0007] Advantages of the present invention: 1. High Safety: The refrigeration equipment of this invention does not use refrigerant, thus avoiding the harm to the environment and personnel caused by refrigerant leakage. Furthermore, the equipment has no moving parts or electrical components, fundamentally eliminating the safety hazards caused by wear and failure of moving parts and sparks generated by electrical components, greatly improving the safety of use in flammable and explosive environments such as mines.

[0008] 2. Easy maintenance: Since there are no moving parts, the equipment does not have mechanical wear problems, which reduces the mechanical maintenance work in daily maintenance. At the same time, the lack of electrical components also avoids the troubleshooting and maintenance work of the electrical system, which greatly simplifies the maintenance work of the equipment and significantly reduces maintenance costs.

[0009] 3. Stable cooling effect: The uniquely designed vortex tube assembly can stably generate cold air. The vortex tube assembly can efficiently separate the compressed air into cold and hot air flows, and the hot air flow valve accurately controls the ratio of cold and hot air flows to ensure the stability of the cold air temperature.

[0010] 4. Strong adaptability: The equipment has a compact structure, small size, light weight, and functional components that can be quickly disconnected and moved by manpower, making it easy to install and move in narrow and complex underground tunnel environments. Whether in mining working faces, tunnels or other areas that require cooling, it can be easily arranged and used.

[0011] 5. The present invention uses hollow sound insulation and acoustic interference noise reduction technology to overcome the disadvantage of high exhaust noise of vortex refrigeration. At the same time, the cold flow ratio of the maximum cooling capacity is determined through experiments. Most of the consumed compressed air is converted into cold air flow, and a small part of the hot air flow is introduced into the cooler and then discharged, which is environmentally friendly and energy-saving.

[0012] 6. The present invention installs multiple vortex refrigeration devices and supplies air in groups, which can provide a large flow of cold air. It can also supply air in single or multiple groups to flexibly adapt to compressor specifications or on-site requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Left view Figure 3 It is a partial enlarged schematic diagram of the hollow wall structure of the box; Figure 4 This is a schematic diagram of the installation of the partition plate and the air diversion pipe; Figure 5 This is a schematic diagram of the structure and installation of the gas circuit pressure equalizing pipe; Figure 6 It is a schematic diagram of the noise reduction joint structure; Figure 7 Schematic diagram of airflow interference noise reduction DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] See Figure 1 A refrigerant-free refrigeration device specifically for mines includes a box body 1, with conical covers 4 connected to noise reduction joints 2 at both ends of the box body 1; a partition plate 5 is provided in the middle of the box body 1 cavity, and multiple vortex refrigeration devices are installed on the partition plate 5. The partition plate 5 divides the cavity into two left and right chambers, one of which is provided with multiple air path equalizing pipes 6; high-pressure air enters the vortex refrigeration device through the air path equalizing pipe 6 and generates cold and hot air flows. The cold air flow enters the working environment through the noise reduction joint 2 at one end, and the hot air flow is introduced into the water cooler 3 through the noise reduction joint 2 at the other end and then discharged; See Figure 2 , the air circuit pressure equalizing pipe 6 is connected to the external compressed air through the valve 8; See Figure 2-Figure 3 The box body 1 and the conical cover 4 are composed of double-layer plates, which include an inner plate 10 and an outer plate 11. The two plates are parallel and separated by a support 9 to form a hollow wall of fixed thickness. The inner and outer plates and the support 9 are usually fixed with screws. See Figure 6 The noise reduction joint 2 includes an inner tube 20, an outer tube 21, a flange connection plate 26, a plugging plate 23, an inlet flow control plate 25, an intermediate flow control plate 24, and an outlet flow control plate 22. The inner tube 20 and the outer tube 21 are coaxially welded and fixed at both ends by the plugging plate 23 and the flange connection plate 26 to form a hollow structure. The inlet flow control plate 25, the intermediate flow control plate 24, and the outlet flow control plate 22 are respectively welded and fixed at both ends and the middle of the inner tube 20 perpendicular to the axis. In the above embodiment, the three flow control plates are all shaped as tangential notches, and the notches are staggered 180 degrees from each other, closing 70% of the cross-sectional area.

[0016] See Figure 4 The partition plate 5 includes a left partition plate 14 and a right partition plate 13 that are parallel to each other, and a plurality of support sleeves 17 arranged between the two plates. The periphery of the two plates are welded and fixed to the inner plate 10 of the box body 1. A plurality of through holes are opened on the planes parallel to each other of the two plates, and the support sleeves 7 are placed coaxially with the through holes. See Figure 1 、 Figure 2 and Figure 5The box body 1 has a plurality of holes penetrating the front and rear hollow walls on one side of the partition plate 5, and the gas path pressure equalizing pipe 6 passes through the hole and is fixed with a nut; one end of the gas path pressure equalizing pipe 6 is closed and only communicates with the pressure gauge 7, and the other end is connected to the compressed air source through a valve 8. A plurality of air pipe connecting holes 19 are provided on the pipe body located in the inner cavity of the box body 1; the compressed air of the air source is evenly distributed to the air pipe connecting holes 19 after passing through the valve 8, and then connected to the vortex generator 12 of the vortex refrigeration device through the air pipe; See Figure 4 The vortex refrigeration device includes a vortex generator 12, an air flow pipe 15, and a hot gas flow valve 16. One end of the air flow pipe 15 passes through the through hole of the partition plate 8 to the cavity where the gas path pressure equalizing pipe 6 is located and is connected to the vortex generator 12. It is fixed to the partition plate 8 with a locking nut 18. The other end of the air flow pipe 15 is connected to the hot gas flow valve 16. See Figure 7 The noise of hot and cold air flows is confined to the inner cavity of the box 1 by the hollow wall structure. During the flow process, they interfere with each other under the forced drive of the conical cover 4 and the noise reduction joint 2, and the sound wave intensity is gradually weakened before being discharged.

[0017] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A refrigerant-free refrigeration device for mines, characterized by: The invention comprises a box body (1), both ends of the box body (1) are connected to a conical cover (4), and the conical cover (4) is connected to a noise reduction joint (2); a partition plate (5) is provided in the middle of the cavity of the box body (1), a plurality of vortex refrigeration devices are installed on the partition plate (5), and the partition plate (5) divides the cavity into two left and right cavities, one of which is provided with a plurality of gas path equalizing pipes (6), and the gas path equalizing pipes (6) are connected to the vortex generator (12) of the vortex refrigeration device through a pipeline, and the noise reduction joint (2) of the cavity where the hot gas flow valve (16) is located is connected to the inlet of the cooler (3); The cylindrical walls of the box body (1) and the conical cover (4) are both composed of double-layer plates, wherein the double-layer plates include an inner plate (10) and an outer plate (11), and the two plates are parallel and separated by a support (9) to form a hollow wall of fixed thickness; The noise reduction joint (2) comprises an inner tube (20), an outer tube (21), a flange connection plate (26), a plugging plate (23), an inlet flow control plate (25), an intermediate flow control plate (24), and an outlet flow control plate (22). The inner tube (20) and the outer tube (21) are coaxially fixed at both ends by the plugging plate (23) and the flange connection plate (26) to form a hollow structure. The inlet flow control plate (25), the intermediate flow control plate (24), and the outlet flow control plate (22) are respectively fixed perpendicularly to the axis at both ends and the middle of the inner tube.

2. The refrigerant-free refrigeration equipment for mines according to claim 1, characterized in that: The partition plate (5) includes a left partition plate (14) and a right partition plate (13) that are parallel to each other, and a plurality of support sleeves (17) arranged between the two plates. The peripheries of the two plates are fixed to the inner plate (10) of the box body (1). A plurality of through holes are provided on the planes of the two plates that are parallel to each other, and the support sleeves (17) are coaxially placed with the through holes.

3. The refrigerant-free refrigeration equipment for mines according to claim 1, characterized in that: The cone angle of the conical cover (4) is less than 90 degrees; 4. The refrigerant-free refrigeration equipment for mines according to claim 1, characterized in that: A plurality of gas path pressure equalizing pipes (6) are provided in one of the cavities of the box body (1), and the gas path pressure equalizing pipes (6) pass through the front and rear hollow walls and are fixed with nuts; one end of the gas path pressure equalizing pipe (6) is closed and communicates only with the pressure gauge (7), and the other end is connected to the gas source through the valve (8), and a plurality of gas pipe connection holes (19) are provided on the pipe body located inside the box body (1); 5. The refrigerant-free refrigeration equipment for mines according to claim 1, characterized in that: The vortex refrigeration device comprises a vortex generator (12), an air flow pipe (15), and a hot gas flow valve (16); one end of the air flow pipe (15) is connected to the vortex generator (12) through a through hole of a partition plate (5) to a cavity where an air path pressure equalizing pipe (6) is located, and is fixed to the partition plate (5) by a locking nut (18); the other end of the air flow pipe (15) is connected to the hot gas flow valve (16); 6. The refrigerant-free refrigeration equipment for mines according to claim 1, characterized in that: The three flow control plates of the noise reduction joint (2) are all shaped as chord-cut notches, and the notches are arranged to be staggered 180 degrees from each other.

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