A cooling device used in fully mechanized mining working face

Abstract

The present invention provides a cooling device applied to a fully mechanized mining working face, comprising: a plurality of air coolers arranged at the cooling stations of the fully mechanized mining working face, the air coolers comprising: a hydraulic motor, a fan, a heat exchanger group and a cooling water supply device; the cooling water supply device comprising: a high-low pressure heat exchanger, a circulating water pump, and a constant pressure water supply device; the cooling water output by the cooling water supply device drives the hydraulic motor to work, the hydraulic motor drives the fan to rotate to drive the gas in the mine tunnel to flow through the heat exchanger group, and the cooling water output from the hydraulic motor is transported to the heat exchanger group to exchange heat with the gas flowing through the heat exchanger group. The fan power is effectively combined with the power of the cold water heat exchange. By adding a hydraulic motor, the fan does not need to use electricity, so that the overall safety is higher. The heat exchange is carried out by cold water, and compared with the cold air heat exchange in the prior art, the heat loss carried by the cold water after the heat exchange is less when moving the same distance, and the overall cooling equipment has high cooling efficiency, low power consumption, safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of mine tunnel ventilation and cooling, and in particular relates to a cooling device applied to a fully mechanized mining working face. Background Art

[0002] High temperatures in mines can greatly reduce the work efficiency of mine workers, and as the high temperature continues, electromechanical equipment and workers are damaged to varying degrees by heat damage. The temperature of mines is mainly affected by a variety of comprehensive factors, including surface atmosphere, surrounding rock heat dissipation, human body heat dissipation, electromechanical equipment heat dissipation, and groundwater heat.

[0003] In order to reduce the temperature of underground tunnels and enable both people and machines to work at a suitable temperature, mining technology researchers have tried countless methods through countless generations of joint efforts. For example, using large-volume fans to continuously increase ventilation in the tunnels is low-cost, but the effect is poor. There are also thermal insulation vests or cooling caps, which are very effective, but the cost is too high and not conducive to popularization.

[0004] Therefore, it is particularly important to design a safe and reliable cooling device that can effectively cool down the fully mechanized mining face so that machines or people can work at a comfortable temperature for a long time. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a cooling device applied to a fully mechanized mining face. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0006] The present invention adopts the following technical solution:

[0007] In some optional embodiments, a cooling device applied to a fully mechanized mining working face is provided, comprising: a plurality of cooling air fans arranged at the cooling stations of the fully mechanized mining working face, the cooling air fans comprising: a hydraulic motor, a fan, a heat exchanger group and a cooling water supply device;

[0008] The cooling water outputted by the cooling water supply device drives the hydraulic motor to work, and the hydraulic motor drives the fan to rotate to drive the gas in the mine tunnel to flow through the heat exchanger group, and the cooling water outputted by the hydraulic motor is delivered to the heat exchanger group to exchange heat with the gas flowing through the heat exchanger group;

[0009] A gas diversion device is provided at the air outlet of the air cooler, and the gas diversion device includes: a power channel and a scattering branch pipe arranged around the power channel, the end of the scattering branch pipe is connected with an inlet pipe arranged on the side wall of the mine tunnel, the inlet pipe has a plurality of air outlets from top to bottom, the diameter of the inlet pipe gradually increases from top to bottom, and the spacing between the air outlets gradually decreases.

[0010] In some optional embodiments, the cooling water supply device includes: a high and low pressure heat exchanger and a circulating water pump; the cooling water output from the heat exchanger group is transported to the high and low pressure heat exchangers for cooling, and the cooled cooling water is pumped into the hydraulic motor through the circulating water pump to drive the hydraulic motor to work.

[0011] In some optional embodiments, the cooling water supply device further includes: a constant pressure water replenishment device; the constant pressure water replenishment device is arranged on a pipeline connecting the circulating water pump and the hydraulic motor.

[0012] In some optional embodiments, a trumpet-shaped air collecting duct is provided at the air inlet of the air cooler, and a filter is provided in the air collecting duct.

[0013] In some optional embodiments, an air outlet pipe is arranged in the air outlet, and the air outlet pipes on each of the inlet pipes are all oriented toward the central axis of the mine tunnel; a water collecting trough is arranged below the air outlet pipe, and the water collecting trough is connected to a water pipe, and the water pipe is arranged in parallel with the inlet pipe.

[0014] In some optional embodiments, a clamping hoop is provided on the introduction pipe, an arc-shaped fastening hoop is provided on the clamping hoop, and the water conduit is installed on the introduction pipe through the arc-shaped fastening hoop.

[0015] In some optional embodiments, an L-shaped sealing gasket is arranged between the air outlet of the inlet pipe and the air outlet pipe, the air outlet pipe has a sinking platform at one end connected to the air outlet, and the L-shaped sealing gasket is pressed between the sinking platform and the side wall of the air outlet.

[0016] In some optional embodiments, the heat exchanger group includes a plurality of cross-arranged serpentine tubes, each of which is connected in sequence in a direction gradually away from the fan; a plurality of extension tubes are provided on each row of the serpentine tubes, and the ends of the extension tubes are extended to the pipes of the adjacent row.

[0017] In some optional embodiments, the surfaces of the diversion pipe and the inlet pipe are coated with a thermal insulation film.

[0018] In some optional embodiments, an axial flow fan is provided in the power channel and at the end of the inlet pipe.

[0019] The beneficial effects brought by the present invention are as follows: after the cold water drives the hydraulic motor to drive the fan, the cold water passes through the heat exchanger group for effective air-water heat exchange, thereby effectively combining the power of the fan with the power of the cold water heat exchange. By adding a hydraulic motor, the fan does not need electricity, making the overall safety higher. And the heat exchange by cold water, compared with the cold air heat exchange in the prior art, when moving the same distance, the heat loss carried by the cold water after heat exchange is less, so that the overall cooling equipment has high cooling efficiency, low power consumption, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the principle diagram of the air cooler of the present invention;

[0021] Figure 2 It is a schematic diagram of the arrangement of the air cooler of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the cooling device of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the introduction tube of the present invention;

[0024] Figure 5 Schematic diagram of the arrangement of the air outlet pipe of the present invention;

[0025] Figure 6 It is a schematic diagram of the connection between the inlet pipe and the water pipe of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross arrangement of serpentine tubes in the heat exchanger group of the present invention;

[0027] Figure 8 It is a schematic diagram of the serpentine tube of the present invention. DETAILED DESCRIPTION

[0028] The following description and accompanying drawings fully demonstrate specific embodiments of the present invention so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent possible variations only. Unless clearly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments.

[0029] In some illustrative embodiments, Figures 1 to 3 As shown, a cooling device applied to a fully mechanized mining face is provided, comprising: a plurality of air coolers 1, each cooling station on the fully mechanized mining face 3 is provided with an air cooler 1, and the cooling station is located in a mine tunnel 2 perpendicular to the fully mechanized mining face. Generally, 20 cooling stations are arranged within a total length of 200 meters of the fully mechanized mining face 3.

[0030] The air cooler 1 includes: a hydraulic motor 101, a fan 102, a heat exchanger group 103 and a cooling water supply device. The cooling water supply device provides cooling water. The cooling water has two functions: one is to drive the hydraulic motor 101 to work, and the other is to cool down by exchanging heat with the high-temperature air on the fully mechanized working face through the heat exchanger group 103. The power output shaft of the hydraulic motor 101 is connected to the fan 102, driving the fan 102 to rotate. The air outlet side of the fan 102 faces the heat exchanger group 103. The fan 102 draws high-temperature air into the air inlet 104 of the air cooler 1 and blows it toward the heat exchanger group 103. The high-temperature air flowing through the heat exchanger group 103 exchanges heat with the cooling water provided by the cooling water supply device. The water outlet of the cooling water supply device is connected to the water inlet of the hydraulic motor 101, and the water outlet of the hydraulic motor 101 is connected to the water inlet of the heat exchanger group 103. The cooling water provided by the cooling water supply device first provides operating power for the hydraulic motor 101, and then is transported to the heat exchanger group 103 for heat exchange. The heat exchanger group 103 is an air-water heat exchanger.

[0031] The present invention utilizes cooling water outputted by a cooling water supply device to drive a hydraulic motor 101 to work. The hydraulic motor 101 drives a fan 102 to rotate to drive the gas in the mine tunnel to flow through a heat exchanger group 103. The cooling water outputted by the hydraulic motor 101 is delivered to the heat exchanger group 103 to exchange heat with the gas flowing through the heat exchanger group. When cold water and cold air move the same distance in a high temperature environment, the heat loss carried by the cold water after heat exchange is less, so that the overall cooling equipment has a high cooling efficiency. The use of hydraulic motors in mines is safe, and the cooling water is also used for heat exchange, which reduces the power consumption of the equipment and reduces costs.

[0032] The air cooler 1 of the present invention can be set at the working equipment in the mine tunnel as a cooling station. Since some large equipment will make the ambient temperature 5 to 6°C higher when working, the air cooler of the present invention is more suitable for local cooling. In addition, it can also provide a buffer working area for underground workers to avoid workers being in a high temperature environment for a long time.

[0033] The cooling water supply device includes: a high-low pressure heat exchanger 105, a circulating water pump 106, and a constant pressure water supply device 107. The water outlet of the heat exchanger group 103 is connected to the heat medium inlet of the high-low pressure heat exchanger 105, the heat medium outlet of the high-low pressure heat exchanger 105 is connected to the water inlet of the circulating water pump 106, and the water outlet of the circulating water pump 106 is connected to the water inlet of the hydraulic motor 101. After the cooling water exchanges heat with the high-temperature air, the temperature rises. The cooling water output from the heat exchanger group 103 is transported to the high-low pressure heat exchanger 105 for cooling. The refrigerant medium of the high-low pressure heat exchanger 105 can be uniformly supplied from the outside. The cooling water cooled by the high-low pressure heat exchanger 105 is pumped into the hydraulic motor 101 through the circulating water pump 106 to drive the hydraulic motor 101 to work, thereby completing the circulation of the cooling water. The constant pressure water replenishment device 107 is arranged on the pipeline connecting the circulating water pump 106 and the hydraulic motor 101 to replenish water to avoid lack of cooling water.

[0034] The present invention further includes: a gas flow guiding device 4, the gas flow guiding device 4 is connected to the air outlet 108 of the air cooler, and the cold air from the air outlet 108 of the air cooler enters the gas flow guiding device 4 for diversion. The gas flow guiding device 4 includes: a power channel 401, a diversion pipeline 402, an inlet pipe 403, an air outlet pipe 404, a water collecting tank 405, a water guide pipe 406,

[0035] The shunt pipe 402 is arranged around the power channel 401 and is scattered. The end of the shunt pipe 402 is connected to the introduction pipe 403 arranged on the side wall of the mine tunnel. The shunt pipe 402 guides the cold gas to the introduction pipes 403 around. The introduction pipes 403 are evenly distributed on the wall of the mine tunnel, generally 4 to 6, and the number of the shunt pipes 402 is consistent with the number of the introduction pipes 403. The introduction pipe 403 has several air outlets from top to bottom, and the cold gas is sprayed into the mine tunnel from the air outlets. The diameter of the introduction pipe 403 gradually increases from top to bottom, and the spacing of the air outlets gradually decreases. When the cold gas just enters the introduction pipe 403, the temperature is the lowest and the flow rate is the fastest. Through the design of the present invention, the cold gas can quickly reach the lower half of the introduction pipe 403, so that the cold gas is focused on the key area, avoiding the cold gas from losing most of the heat before reaching the bottom, thereby reducing the cooling effect. Moreover, the introduction pipe 403 gradually ejects cold air along the side wall of the mine tunnel, and the ejection volume is getting larger and larger. The cold gas goes downward, and the hot gas goes upward between each introduction pipe 403, so that the gas can achieve rapid circulation flow, reduce the mutual influence of hot and cold air, and achieve rapid local cooling of the mine tunnel. It solves the problem of workers temporarily relieving the continuous stuffy state caused by the high temperature environment during the production process. The air volume of the air cooler of the present invention is 450m3 / h, the cooling power is about 10kw, and the wind speed is 0.5m / s.

[0036] like Figure 4 and 5As shown, an air outlet pipe 404 is arranged in the air outlet, and the air outlet pipes 404 on each inlet pipe 403 are all oriented toward the central axis of the mine tunnel, so that the hot and cold air have a good circulation route to avoid mutual influence. A water collecting tank 405 is arranged below the air outlet pipe 404, and the water collecting tank 405 is connected to the water guide pipe 406, and the water guide pipe 406 is arranged in parallel with the inlet pipe 403. Since the outside air is hot, when the cold air passes through the air outlet pipe 404, it is easy to form water droplets, and the water collecting tank 405 can collect the water droplets, and the water guide pipe 406 guides them to the bottom for collection, thereby preventing the falling water from affecting the staff, machinery and equipment, or the mining environment.

[0037] like Figure 6 As shown, a clamping hoop 407 is provided on the inlet pipe 403, and the inlet pipe 403 is installed on the side wall of the mine tunnel through the clamping hoop 407. An arc-shaped fastening hoop 408 is provided on the clamping hoop 407, and the water guide pipe 406 is installed on the inlet pipe 403 through the arc-shaped fastening hoop 408. The inlet pipe 403 provides a supporting force, and the installation of the water guide pipe 406 becomes simple.

[0038] like Figure 4 As shown, an L-shaped sealing gasket 409 is arranged between the air outlet of the inlet pipe 403 and the air outlet pipe 404. The air outlet pipe 404 has a sinking platform at one end connected to the air outlet, and the L-shaped sealing gasket 409 is pressed between the sinking platform and the side wall of the air outlet. The sealing between the air outlet pipe 404 and the inlet pipe 403 is improved. Figure 7 and 8 As shown, the heat exchanger group 103 includes a plurality of cross-arranged serpentine tubes 109, and each serpentine tube 109 is connected in sequence in a direction gradually away from the fan 102, that is, the cooling water passes through each serpentine tube 109 in sequence. The cross-arranged serpentine tubes 109 in the above manner can slow down the flow of gas, increase the heat exchange time, and thus improve the heat exchange efficiency. A plurality of extension tubes 110 are provided on each row of the serpentine tubes 109, and the ends of the extension tubes 110 are extended to the adjacent rows of the pipes. The extension tubes 110 can increase the contact area between the gas and the heat exchanger group 103, and further reduce the gas flow rate, thereby improving the heat exchange efficiency.

[0039] A trumpet-shaped gas collecting duct is provided at the air inlet 104 of the air cooler, which is convenient for collecting gas. A filter 5 is provided in the gas collecting duct, which can block a part of impurities in the air to prevent the impurities from affecting the use of the subsequent equipment.

[0040] The surfaces of the flow distribution pipe 402 and the inlet pipe 403 are covered with a thermal insulation film to play a role in thermal insulation and reduce the heat loss of the cold gas.

[0041] Axial flow fans are provided in the power channel 401 and at the end of the inlet pipe 403 to accelerate the gas flow and provide power for the gas flow.

[0042] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

Claims

1. A cooling device applied to a fully mechanized mining working face, characterized in that: include: Several cooling air fans arranged at the cooling stations of the fully mechanized mining working face, the cooling air fans comprising: a hydraulic motor, a fan, a heat exchanger group and a cooling water supply device; The cooling water outputted by the cooling water supply device drives the hydraulic motor to work, and the hydraulic motor drives the fan to rotate to drive the gas in the mine tunnel to flow through the heat exchanger group, and the cooling water outputted by the hydraulic motor is delivered to the heat exchanger group to exchange heat with the gas flowing through the heat exchanger group; A trumpet-shaped air collecting pipe is arranged at the air inlet of the air cooler, and a gas guide device is arranged at the air outlet of the air cooler, wherein the gas guide device comprises: a power channel and a scattering flow distribution pipe arranged around the power channel, the end of the scattering flow distribution pipe is connected with an inlet pipe arranged on the side wall of the mine tunnel, and the inlet pipe is provided with a plurality of air outlets from top to bottom, the diameter of the inlet pipe gradually increases from top to bottom, and the spacing between the air outlets gradually decreases; After the cooling water drives the hydraulic motor to drive the fan, the cooling water passes through the heat exchanger group for effective air-water heat exchange, thereby combining the fan power with the power of air-water heat exchange. By adding a hydraulic motor, the fan does not need electricity.

2. The cooling device applied to a fully mechanized mining face according to claim 1 is characterized in that: The cooling water supply device includes: a high- and low-pressure heat exchanger and a circulating water pump; the cooling water output from the heat exchanger group is transported to the high- and low-pressure heat exchanger for cooling, and the cooled cooling water is pumped into the hydraulic motor through the circulating water pump to drive the hydraulic motor to work.

3. The cooling device applied to a fully mechanized mining face according to claim 2 is characterized in that: The cooling water supply device also includes: a constant pressure water replenishment device; the constant pressure water replenishment device is arranged on the pipeline connecting the circulating water pump and the hydraulic motor.

4. The cooling device applied to a fully mechanized mining face according to claim 3 is characterized in that: An air outlet pipe is arranged in the air outlet, and the air outlet pipes on each of the inlet pipes are all oriented toward the central axis of the mine tunnel; a water collecting trough is arranged below the air outlet pipe, and the water collecting trough is connected to a water guide pipe, and the water guide pipe is arranged in parallel with the inlet pipe.

5. The cooling device applied to a fully mechanized mining face according to claim 4 is characterized in that: A clamping hoop is arranged on the introduction pipe, an arc-shaped fastening hoop is arranged on the clamping hoop, and the water guide pipe is installed on the introduction pipe through the arc-shaped fastening hoop.

6. The cooling device applied to a fully mechanized mining face according to claim 5, characterized in that: An L-shaped sealing gasket is arranged between the air outlet of the inlet pipe and the air outlet pipe, and a sinking platform is provided at one end of the air outlet pipe connected to the air outlet, and the L-shaped sealing gasket is pressed between the sinking platform and the side wall of the air outlet.

7. The cooling device applied to a fully mechanized mining face according to claim 6 is characterized in that: The heat exchanger group includes a plurality of cross-arranged serpentine tubes, each of which is connected in sequence in a direction gradually away from the fan; a plurality of extension tubes are arranged on each row of the serpentine tubes, and the ends of the extension tubes are extended to the pipes of the adjacent row.

8. The cooling device applied to a fully mechanized mining face according to claim 7, characterized in that: The surfaces of the diversion pipe and the introduction pipe are covered with a thermal insulation film.

9. The cooling device applied to a fully mechanized mining face according to claim 8, characterized in that: Axial flow fans are arranged in the power channel and at the end of the introduction pipe.

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