Mine refrigeration cooling pipeline arrangement system

Abstract

The invention relates to the technical field of mine refrigeration and cooling, in particular to a mine refrigeration and cooling pipeline arrangement system. The water outlet end of a main circulation pipeline is connected with the water inlet end of a cooling device to form a closed circulation loop; the main circulation pipeline is laid in the extending direction of the roadway and serves as a liquid supply mother pipe of each refrigerating unit. The branch pipelines of the refrigerating units are respectively led out from different positions on the main circulation pipeline; the negative pressure water return devices are installed on the main circulation pipeline in series, and each negative pressure water return device is located behind the branch pipeline leading-out point of the refrigerating unit corresponding to the negative pressure water return device and in front of the branch pipeline leading-out point of the next refrigerating unit and used for forming an alternate series-connection arrangement structure. Through alternate series arrangement, the dual functions of liquid supply and water return of the main circulation pipeline are achieved, the pipeline layout is greatly simplified, the roadway space occupation is reduced, the installation cost and the leakage risk are reduced, and the system adapts to complex working conditions of mines.

Description

Technical Field

[0001] This invention relates to the field of mine cooling technology, and in particular to a mine cooling pipeline layout system, belonging to underground treatment technology, and is classified under E21F15 / 00. Background Technology

[0002] As mining depth increases, geothermal heat from the surrounding rock and heat dissipation from equipment lead to higher ambient temperatures, making refrigeration systems essential for safe production. Current mainstream solutions employ a parallel configuration with dual main pipelines and multiple branch pipelines: the cooling medium is delivered to each refrigeration unit via the main supply pipeline, and after heat exchange, it flows back into the main return water pipe via branch return water pipes. This solution has the following drawbacks: significant pipeline redundancy, occupying roadway space, increasing installation costs and leakage risks; most critically, in the parallel return water structure, the return water from each unit directly flows into the main return water pipe, creating pressure superposition, resulting in high back pressure, poor return water flow, and even backflow (a "water grabbing" phenomenon) in remote units. To ensure remote liquid supply, the head of the circulating power unit needs to be significantly increased, resulting in energy waste and difficulty in fundamentally solving the pressure imbalance problem.

[0003] Therefore, the existing technology has problems and needs further improvement and development. Summary of the Invention

[0004] (I) Purpose of the invention: In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a mine cooling pipeline layout system that can realize simplified pipeline layout, improved space utilization, reduced cost, effectively solve the problems of pressure imbalance of multiple units and insufficient remote liquid supply, and has dynamic temperature control adjustment capability.

[0005] (II) Technical Solution: To solve the above-mentioned technical problems, this technical solution provides a mine cooling pipeline layout system, including a cooling device, a buffer water storage device, a circulating power device, a refrigeration unit, a main flow pipeline, and a negative pressure return water device. The outlet of the cooling device is connected to the inlet of the buffer water storage device. The outlet of the buffer water storage device is connected to the inlet of the main flow pipe through a circulation power device. The outlet of the main flow pipe is connected to the inlet of the cooling device to form a closed loop. The main flow pipe is laid along the direction of the roadway extension and also serves as the main liquid supply pipe for each refrigeration unit. The number of refrigeration units is several, and the branch pipes of each refrigeration unit are led out from different positions on the main flow pipe; The number of negative pressure return water devices is several, and each negative pressure return water device is installed in series on the main flow pipe. Each negative pressure return water device is located after the branch pipe outlet of its corresponding chiller unit and before the branch pipe outlet of the next chiller unit, so as to form an alternating series arrangement structure. The outlet of the refrigeration unit is connected to the suction end of the corresponding negative pressure return water device through a pipe. The negative pressure return water device is used to generate negative pressure under the drive of the cooling medium in the main flow pipe, so as to draw the heated cooling medium after heat exchange of the refrigeration unit into the main flow pipe. After mixing with the cooling medium in the main flow pipe, it supplies liquid to the downstream refrigeration units in sequence.

[0006] Furthermore, the negative pressure return water device is a Venturi jet, the nozzle-to-throat diameter ratio of the Venturi jet is 1:3 to 1:5, and the inner wall of the throat is provided with a spiral guide groove to enhance the fluid disturbance intensity at the suction end and improve the suction efficiency of the cooling medium for the refrigeration unit.

[0007] Furthermore, the rated head H of the circulating power unit and the total frictional resistance h of the main flow pipe are related. f The local resistance h of each stage of the Venturi jet j and system reserve margin h y Satisfying: H=h f +Σh j +h y ; The local resistance of the Venturi jet is adjusted according to the ratio of nozzle to throat diameter and the structure of the spiral guide groove. The negative pressure generated at the suction end of each stage of the Venturi jet is -0.03MPa to -0.08MPa, which is used to overcome the total resistance of the branch pipe and its internal components.

[0008] Furthermore, an anti-backflow component is connected in series on the connecting pipe between the suction end of the Venturi jet and the outlet of the refrigeration unit. The conduction direction of the anti-backflow component is from the refrigeration unit to the Venturi jet, which is used to prevent the cooling medium in the main flow pipe from flowing back to the refrigeration unit.

[0009] Furthermore, the diffuser outlet of the Venturi jet is provided with a temperature detection component, which is electrically connected to the speed control component of the circulating power unit. When the real-time temperature detected by the temperature detection component differs from the preset threshold, the speed control component outputs a corresponding frequency adjustment signal to the circulating power unit according to the magnitude of the difference, so that the flow rate of the cooling medium in the main flow pipe is positively correlated with the difference, ensuring that the temperature of the mixed cooling medium remains stable below the preset threshold.

[0010] Furthermore, the distance between the temperature detection component and the outlet end of the Venturi jet diffuser tube is 30mm~80mm, and the temperature detection component includes a temperature sensor.

[0011] Furthermore, a flow regulating component is connected in series on the branch pipe of the refrigeration unit. The flow regulating component is used to regulate the flow rate of the cooling medium flowing into the heat exchange unit of the refrigeration unit to adapt to the load requirements of the refrigeration unit. The flow regulating component includes a flow regulating valve and is electrically connected to the refrigeration unit.

[0012] Furthermore, the branch pipes and main flow pipes of the refrigeration unit are connected by flanges or socket seals, and the connection parts are equipped with corrosion-resistant sealing gaskets. The corrosion-resistant sealing gaskets are made of fluororubber or polytetrafluoroethylene.

[0013] Furthermore, both the inlet and outlet of the buffer water storage device are equipped with a filter device, the filter device having a filtration accuracy of 500μm~800μm, used to remove impurities in the cooling medium.

[0014] Furthermore, the outer surface of the main flow pipe is provided with an anti-corrosion coating, which is a ZS-711 inorganic anti-corrosion coating with a thickness of 200μm~300μm.

[0015] (III) Beneficial Effects: This invention achieves dual functions of liquid supply and return in the main flow pipeline through alternating series arrangement, significantly simplifying pipeline layout, reducing roadway space occupation, and lowering installation costs and leakage risks. Simultaneously, this invention achieves pressure decoupling: each level of negative pressure return water device utilizes the fluid kinetic energy of the main flow pipeline to generate local negative pressure, forcibly drawing return water from the corresponding unit, eliminating the need for branch return water to overcome the back pressure of the main return water pipe, thus completely eliminating the backflow phenomenon of traditional parallel systems. The head of the circulating power unit only needs to overcome the frictional resistance along the main flow pipeline and the local resistance of the Venturi jet, reducing installed power and significantly minimizing the deviation in liquid supply flow rate among the various refrigeration units. This invention adjusts the main circulation flow rate in real time according to the temperature of the mixed cooling medium, ensuring stable liquid supply temperature. The overall structure is flexible and adaptable to complex mine conditions, achieving significant technical improvements in space saving, energy consumption reduction, and flow distribution uniformity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the working principle of a mine cooling and temperature reduction pipeline layout system according to the present invention. Figure 2 This is a schematic diagram of the on-site pipeline layout of a mine cooling and temperature reduction pipeline system according to the present invention; Figure 3 This is a structural diagram of a Venturi jet injector for a mine cooling and temperature reduction pipeline layout system according to the present invention.

[0017] Reference numerals in the attached diagram: 1. Refrigeration unit; 2. Circulating power unit; 3. Buffer water storage device; 4. Cooling device; 5. Negative pressure return water device; 501. Venturi jet; 6. Main flow pipe. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to preferred embodiments. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0019] The accompanying drawings are schematic diagrams of embodiments of the present invention. It should be noted that these drawings are for illustrative purposes only and are not drawn to scale, and should not be construed as limiting the actual scope of protection of the present invention.

[0020] like Figure 1 , Figure 2 As shown, a mine cooling pipeline layout system includes a cooling device 4, a buffer water storage device 3, a circulating power device 2, several refrigeration units 1, a main flow pipeline 6, and several negative pressure return water devices 5.

[0021] The outlet of the cooling device 4 is connected to the inlet of the buffer water storage device 3. The outlet of the buffer water storage device 3 is connected to the inlet of the main flow pipe 6 through the circulation power device 2. The outlet of the main flow pipe 6 is connected to the inlet of the cooling device 4 to form a closed loop.

[0022] The main flow pipe 6 is laid along the direction of the tunnel extension and simultaneously serves as the main supply pipe for each refrigeration unit 1. Branch pipes of each refrigeration unit 1 are led out from different positions on the main flow pipe 6. Each negative pressure return water device 5 is installed in series on the main flow pipe 6, with each negative pressure return water device 5 located after the branch pipe exit point of its corresponding refrigeration unit 1 and before the branch pipe exit point of the next refrigeration unit 1, forming an alternating series arrangement from the branch pipe exit point to the negative pressure return water device exit point. The outlet of the refrigeration unit 1 is connected to the suction end of its corresponding negative pressure return water device 5 via a pipe.

[0023] The flow direction of the cooling medium in the main flow pipe 6 is as follows: Figure 1As shown by the middle arrow. Taking the first stage as an example: The cooling medium in the main flow pipe 6 first flows through the branch pipe outlet of the first refrigeration unit 1. Part of the medium is diverted into the first refrigeration unit 1 for heat exchange. The heated cooling medium flows out from the outlet of the first refrigeration unit 1 and is sent to the suction end of the first negative pressure return water device 5 through the connecting pipe. At the same time, the remaining cooling medium in the main flow pipe 6 continues to flow forward through the first negative pressure return water device 5. Under the action of the Venturi effect, the suction end of the first negative pressure return water device 5 generates negative pressure, which draws the heated cooling medium of the first refrigeration unit 1 into the main flow pipe 6 and mixes with the cooling medium in the main flow pipe 6. The mixed cooling medium continues forward as the liquid supply medium for the second refrigeration unit 1. And so on, each stage circulates in the manner of liquid supply-return-mixing-resupply.

[0024] The alternating series structure ensures that the return water at each stage is forcibly drawn in by local negative pressure. The return water pressure only needs to overcome the resistance of the branch pipes and internal components, and is independent of the pressure in the main flow pipe 6. The return water from each chiller unit 1 no longer interferes with each other, fundamentally solving the problems of high back pressure and insufficient flow of the remote unit in traditional parallel systems.

[0025] The negative pressure return water device 5 is preferably a Venturi jet injector 501. For example... Figure 3 As shown, the nozzle-to-throat diameter ratio of the Venturi jet injector 501 is 1:3 to 1:5, and the inner wall of the throat is provided with a spiral guide groove with a depth of 200μm to 300μm and a pitch of 10mm to 20mm. This diameter ratio is a critical match for the mine circulating medium and branch pipelines ≤100m and the resistance requirements of the condenser of the refrigeration unit: if the diameter ratio is too large, the flow velocity in the throat is too low, and an effective negative pressure cannot be formed; if it is too small, the flow velocity in the throat is too high, the local resistance surges, and the energy of the circulating power unit 2 is excessively consumed, resulting in a decrease in the main circulation flow. The spiral guide groove is used to guide the fluid in the main flow pipe 6 to form a spiral flow, enhance the fluid disturbance intensity at the suction end, avoid the formation of vortex dead zones in the throat, and improve the negative pressure stability and suction efficiency at the suction end.

[0026] The circulating power unit 2 is a mine-specific circulating water pump with speed regulation function, and can be a variable frequency centrifugal pump, explosion-proof centrifugal pump, etc. Its rated head H and the total friction resistance h of the main flow pipeline 6 are considered. f The local resistance h of each stage of the Venturi jet 501 j and system reserve margin h y Satisfying: H = h f + Σh j + h y The local resistance h of the Venturi jet 501 jThe ratio of its nozzle to throat diameter and the structure of its spiral guide groove are determined by this design. Through this matching, it is ensured that while the circulating power unit 2 provides the main circulation flow, the suction end of each stage of the Venturi jet 501 can generate a stable negative pressure value sufficient to overcome the total resistance of the branch pipes, their internal flow regulating valves, and the heat exchange unit. This negative pressure range has been experimentally verified to ensure smooth suction of return water even under maximum branch resistance conditions, and to prevent the cooling medium in the branch pipes from vaporizing or air from being drawn in due to excessive negative pressure.

[0027] A backflow prevention component is connected in series on the connecting pipe between the suction end of the Venturi jet 501 and the outlet of the refrigeration unit 1. The backflow prevention component is a straight-through check valve or a swing check valve, with the conduction direction from the refrigeration unit 1 to the Venturi jet 501. It is used to prevent the cooling medium in the main flow pipe 6 from flowing back to the refrigeration unit 1, which would cause the cooling medium in the heat exchange unit to backflow, abnormal pressure, and thus affect the normal operation of the refrigeration unit 1 or even damage the unit components.

[0028] A flow regulating component is connected in series on the branch pipes of the refrigeration unit 1 to regulate the flow rate of the cooling medium flowing into each heat exchange unit of the refrigeration unit 1, adapting to the load requirements of different refrigeration units 1. The flow regulating component includes a flow regulating valve, which is electrically connected to the refrigeration unit 1 to realize automatic flow regulation. The adjustment range of the flow regulating valve is 30% to 110% of the rated flow rate, which can adjust the cooling medium flow rate according to the load changes of a single refrigeration unit 1, ensuring that each refrigeration unit 1 can operate at the optimal cooling medium flow rate, thus guaranteeing the cooling effect and avoiding waste of cooling medium.

[0029] The Venturi jet 501 has a temperature detection component at the diffuser outlet, which includes a temperature sensor installed 30mm to 80mm from the diffuser outlet. This sensor is used to accurately detect the temperature of the mixed cooling medium. The temperature detection component is electrically connected to the speed control component of the circulating power unit 2.

[0030] The speed control component includes a PID control module or a variable frequency drive. Its control logic is as follows: when the real-time temperature detected by the temperature detection component differs from a preset threshold, the speed control component, based on the magnitude of the difference, outputs a corresponding frequency adjustment signal to the circulating power unit 2 using a PID algorithm or proportional control algorithm. This causes the cooling medium flow rate in the main flow pipe 6 to be positively correlated with the difference; for example, the larger the difference, the greater the frequency increase, thereby stabilizing the temperature of the mixed cooling medium below the preset threshold. Preferably, the preset threshold is 40℃~45℃. Through this closed-loop control, the system can dynamically adapt to changes in downhole heat load, avoiding excessive cooling capacity leading to excessive liquid supply temperature in the downstream refrigeration unit, while also preventing excessive liquid supply and energy waste.

[0031] The branch pipes of the refrigeration unit 1 are connected to the main flow pipe 6 via flanges or socket seals, and the connection points are equipped with corrosion-resistant sealing gaskets made of fluororubber or polytetrafluoroethylene. Both the inlet and outlet ends of the buffer water storage device 3 are equipped with filters with a filtration accuracy of 500μm~800μm, used to remove impurities from the cooling medium while preventing excessive pressure loss due to excessive filtration accuracy, thus ensuring system circulation efficiency. The outer surface of the main flow pipe 6 is coated with an anti-corrosion coating, which is a ZS-711 inorganic anti-corrosion coating with a thickness of 200μm~300μm, used to extend the service life of the main flow pipe 6.

[0032] Workflow Cooling device 4 starts operating, cooling the circulating cooling medium. The cooled, low-temperature cooling medium is then transported through pipelines to buffer water storage device 3. After sedimentation and buffering in buffer water storage device 3, it enters the inlet of circulating power device 2. Circulating power device 2 starts, pressurizing the low-temperature cooling medium and transporting it to the main flow pipe 6, forming a stable main circulating water flow. The flow velocity of the cooling medium in the main flow pipe 6 is controlled between 1.2 m / s and 2.5 m / s.

[0033] According to the load requirements of each refrigeration unit 1, the flow regulating components on the branch pipes are adjusted to precisely deliver the low-temperature cooling medium in the main flow pipe 6 to the refrigeration unit 1 through the branch pipes. The low-temperature cooling medium exchanges heat with the refrigerant in the refrigeration unit 1, absorbing the condensation heat released by the refrigerant, raising the temperature of the cooling medium to 40℃~45℃. When the low-temperature cooling medium in the main flow pipe 6 flows through the series-installed Venturi ejectors 501, a stable negative pressure is generated at the suction end under the Venturi effect. Through the connecting pipes and anti-backflow components, the heated cooling medium after heat exchange in the refrigeration unit 1 is smoothly drawn into the main flow pipe 6. The heated cooling medium and the low-temperature cooling medium in the main flow pipe 6 are thoroughly mixed. The mixed cooling medium continues to flow along the main flow pipe 6 to the inlet of the branch pipe of the downstream refrigeration unit 1, providing the downstream refrigeration unit 1 with a cooling medium that meets the temperature requirements, achieving efficient recycling of the cooling medium. Among them, the water flow rate in the main flow pipe 6 is much greater than the cooling medium flow rate required by each refrigeration unit. After each refrigeration unit heats up, the temperature rise of the mixed cooling medium does not exceed 1°C.

[0034] The temperature detection component monitors the temperature of the mixed cooling medium at the outlet of the diffuser tube of the Venturi jet 501 in real time. When the detected temperature exceeds a preset threshold, the speed control component automatically adjusts the operating frequency of the circulating power unit 2 through a PID / frequency conversion algorithm, increasing the flow rate of the cooling medium in the main flow pipe 6, reducing the temperature rise of the mixed cooling medium, and ensuring that the temperature of the mixed cooling medium is always within a reasonable range. After flowing through the inlets of all branch pipes of the chiller unit 1, the mixed cooling medium in the main flow pipe 6 finally flows back to the inlet of the cooling device 4 for re-cooling treatment, completing the entire circulation process and entering the next cycle.

[0035] Through actual production verification, this invention, under the same cooling load, for example in a mine at a depth of 800m, with five refrigeration units and a cooling capacity of 200kW per unit, reduces the total length of the main flow pipeline by approximately 35% and the number of joints by more than 50% compared to the traditional dual-pipe parallel system. Pressure measurements show that the negative pressure at the suction end of each stage of the Venturi jet is stable at -0.045MPa to -0.065MPa, and the return water from each refrigeration unit flows smoothly without backflow. With an 18% reduction in the installed power of the circulating power unit, the liquid supply flow deviation of each refrigeration unit is ≤4.2%, and the liquid supply temperature fluctuation is ≤±1.5℃, meeting the cooling requirements of the mine. These results demonstrate that the comprehensive improvement of this system in terms of space saving, energy consumption reduction, and flow distribution uniformity exceeds the expected effect of simple structural merging, representing a significant and innovative advancement.

[0036] This invention achieves dual functions of liquid supply and return in the main flow pipeline through alternating series arrangement, significantly simplifying pipeline layout, reducing roadway space occupation, and lowering installation costs and leakage risks. Simultaneously, this invention achieves pressure decoupling: each stage of the negative pressure return water device utilizes the fluid kinetic energy of the main flow pipeline to generate local negative pressure, forcibly drawing back water from the corresponding unit, eliminating the need for branch return water to overcome the back pressure of the main return water pipe and completely eliminating the backflow phenomenon of traditional parallel systems. The head of the circulating power unit only needs to overcome the friction resistance along the main flow pipeline and the local resistance of the Venturi jet, reducing installed power and significantly minimizing the deviation in liquid supply flow rate among each refrigeration unit. This invention adjusts the main circulation flow rate in real time according to the temperature of the mixed cooling medium, ensuring stable liquid supply temperature. The overall structure is flexible and adaptable to complex mine conditions, achieving significant improvements in space saving, energy consumption reduction, and flow distribution uniformity.

[0037] The above description illustrates preferred embodiments of the present invention and helps those skilled in the art to more fully understand the technical solution of the present invention. However, these embodiments are merely illustrative and should not be construed as limiting the specific implementation of the present invention to these embodiments. For those skilled in the art, several simple deductions and modifications can be made without departing from the inventive concept, and all such modifications should be considered within the protection scope of the present invention.

Claims

1. A mine cooling pipeline layout system, comprising a cooling device, a buffer water storage device, a circulating power device, a refrigeration unit, a main flow pipeline, and a negative pressure return water device, characterized in that, The outlet of the cooling device is connected to the inlet of the buffer water storage device. The outlet of the buffer water storage device is connected to the inlet of the main flow pipe through a circulation power device. The outlet of the main flow pipe is connected to the inlet of the cooling device to form a closed loop. The main flow pipe is laid along the direction of the roadway extension and also serves as the main liquid supply pipe for each refrigeration unit. The number of refrigeration units is several, and the branch pipes of each refrigeration unit are led out from different positions on the main flow pipe; The number of negative pressure return water devices is several, and each negative pressure return water device is installed in series on the main flow pipe. Each negative pressure return water device is located after the branch pipe outlet of its corresponding chiller unit and before the branch pipe outlet of the next chiller unit, so as to form an alternating series arrangement structure. The outlet of the refrigeration unit is connected to the suction end of the corresponding negative pressure return water device through a pipe. The negative pressure return water device is used to generate negative pressure under the drive of the cooling medium in the main flow pipe, so as to draw the heated cooling medium after heat exchange of the refrigeration unit into the main flow pipe. After mixing with the cooling medium in the main flow pipe, it supplies liquid to the downstream refrigeration units in sequence.

2. The mine cooling and temperature reduction pipeline layout system according to claim 1, characterized in that, The negative pressure return water device is a Venturi jet, and the ratio of the nozzle to the throat diameter of the Venturi jet is 1:3 to 1:

5. The inner wall of the throat is provided with a spiral guide groove to enhance the fluid disturbance intensity at the suction end and improve the suction efficiency of the cooling medium for the refrigeration unit.

3. A mine cooling and temperature reduction pipeline layout system according to claim 2, characterized in that, The rated head H of the circulating power unit and the total friction resistance h of the main flow pipe f The local resistance h of each stage of the Venturi jet j and system reserve margin h y Satisfying: H=h f +Σh j +h y ; The local resistance of the Venturi jet is adjusted according to the ratio of nozzle to throat diameter and the structure of the spiral guide groove. The negative pressure generated at the suction end of each stage of the Venturi jet is -0.03MPa to -0.08MPa, which is used to overcome the total resistance of the branch pipe and its internal components.

4. A mine cooling and temperature reduction pipeline layout system according to claim 2, characterized in that, A backflow prevention component is connected in series on the pipe connecting the suction end of the Venturi jet to the outlet of the refrigeration unit. The conduction direction of the backflow prevention component is from the refrigeration unit to the Venturi jet, which is used to prevent the cooling medium in the main flow pipe from flowing back to the refrigeration unit.

5. A mine cooling and temperature reduction pipeline layout system according to claim 4, characterized in that, The diffuser tube outlet end of the Venturi jet is equipped with a temperature detection component, which is electrically connected to the speed control component of the circulating power unit. When the real-time temperature detected by the temperature detection component differs from the preset threshold, the speed control component outputs a corresponding frequency adjustment signal to the circulating power unit according to the magnitude of the difference, so that the flow rate of the cooling medium in the main flow pipe is positively correlated with the difference, ensuring that the temperature of the mixed cooling medium remains stable below the preset threshold.

6. A mine cooling and temperature reduction pipeline layout system according to claim 5, characterized in that, The distance between the temperature detection component and the outlet end of the Venturi jet diffuser tube is 30mm~80mm, and the temperature detection component includes a temperature sensor.

7. A mine cooling and temperature reduction pipeline layout system according to claim 1, characterized in that, A flow regulating component is connected in series on a branch pipe of the refrigeration unit. The flow regulating component is used to regulate the flow rate of the cooling medium flowing into the heat exchange unit of the refrigeration unit to adapt to the load requirements of the refrigeration unit. The flow regulating component includes a flow regulating valve and is electrically connected to the refrigeration unit.

8. A mine cooling and temperature reduction pipeline layout system according to claim 1, characterized in that, The branch pipes and main flow pipes of the refrigeration unit are connected by flanges or socket seals, and the connection parts are equipped with corrosion-resistant sealing gaskets. The corrosion-resistant sealing gaskets are made of fluororubber or polytetrafluoroethylene.

9. A mine cooling and temperature reduction pipeline layout system according to claim 1, characterized in that, Both the inlet and outlet of the buffer water storage device are equipped with a filter device, and the filter device has a filtration accuracy of 500μm~800μm, which is used to remove impurities in the cooling medium.

10. A mine cooling and temperature reduction pipeline layout system according to claim 1, characterized in that, The outer surface of the main flow pipe is provided with an anti-corrosion coating, which is a ZS-711 inorganic anti-corrosion coating with a thickness of 200μm~300μm.

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