A circulating water cooling device for coal mine underground equipment

Abstract

The utility model discloses a kind of circulating water cooling equipment for underground equipment of coal mine, including cooling box, circulating water tank, first water pump, heat exchange coil pipe, second water pump, air cooler and spray module;The circulating water tank is arranged at the left side of the cooling box, and the air cooler is arranged at the right side of the cooling box;The cooling box is hollow inside and the left and right sides are respectively provided with ventilation opening;The heat exchange coil pipe is arranged in the cooling box, and the spray module is arranged above the heat exchange coil pipe and is used to spray to the heat exchange coil pipe;The input end of the heat exchange coil pipe is connected with water inlet pipe, the output end of the heat exchange coil pipe is connected with water outlet pipe, and the water outlet pipe is connected with the circulating water tank;The input end of the second water pump is connected with the water outlet of the cooling box, and the output end of the second water pump is connected with the spray module;The input end of the first water pump is connected with the circulating water tank.

Description

Technical Field

[0001] This utility model relates to the field of air compressor cooling technology, and in particular to a circulating water cooling device for underground coal mine equipment. Background Technology

[0002] In the underground coal mine environment, air compressors are crucial power equipment, and their stable operation directly affects mining efficiency and operational safety. Due to the enclosed space and limited ventilation underground, air compressors generate a significant amount of heat during high-speed operation, with compressed air and lubricating oil experiencing particularly noticeable temperature rises. If heat dissipation is not timely and effective, it can easily lead to overheating, performance degradation, or even malfunctions. Therefore, equipping air compressors with reliable cooling systems is key to ensuring their continuous operation underground.

[0003] Currently, water cooling is commonly used inside air compressors in coal mines to dissipate heat from the air and lubricating oil. This method involves heat exchange between circulating water and heat-generating components, carrying away heat and maintaining the normal operating temperature of the air compressor. However, existing circulating water cooling equipment has significant drawbacks in its structural layout and operation:

[0004] On the one hand, in terms of structural layout, existing cooling equipment mostly adopts a vertically stacked layout, where core cooling components (such as radiators, water pumps, and water tanks) are arranged vertically in sequence. While this vertical layout simplifies the water flow path to some extent, it results in an overall height of the cooling equipment being too high. The underground space of coal mines has unique characteristics; its height and width are strictly limited by geological conditions and mining processes, especially in some older mines or narrow tunnels where space is even more confined. Excessively tall cooling equipment often cannot adapt to the height limitations of the mine during transportation and installation, making it difficult to access the work area. This not only increases the difficulty and cost of equipment entry but may even delay underground operations. Furthermore, the vertical layout causes the equipment's center of gravity to shift upwards, resulting in poor stability on uneven underground surfaces or during transportation, posing certain safety hazards. Simultaneously, the vertical structure is also unfavorable for equipment maintenance and repair. When operators perform maintenance on upper components in a confined space, the ease of operation is significantly reduced, increasing the complexity of maintenance work.

[0005] On the other hand, in terms of operation, most existing cooling equipment lacks a circulating water tank function, and typically uses well water directly from the mine as its cooling water source. Mine water, influenced by the underground environment, contains a large amount of impurities such as silt, rock fragments, and mineral deposits. These impurities easily accumulate inside the cooling system's pipes and heat exchange components as the cooling water flows through them, causing pipe blockages and reduced heat exchange efficiency over time. Once the cooling system becomes blocked, it cannot effectively dissipate heat from the air compressor, leading to overheating and shutdown, severely impacting normal underground operations and increasing equipment maintenance frequency and costs.

[0006] In summary, the shortcomings of traditional circulating water cooling equipment in terms of structural layout and water source utilization make it difficult to meet the requirements of underground air compressors in coal mines for space adaptability, operational stability and ease of maintenance. Optimizing and improving these equipment is of great practical significance. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a circulating water cooling device for underground coal mine equipment.

[0008] A circulating water cooling device for underground coal mine equipment designed for this purpose includes a cooling tank, a circulating water tank, a first water pump, a heat exchange coil, a second water pump, an air cooler, and a spray module.

[0009] The circulating water tank is located on the left side of the cooling tank, and the air cooler is located on the right side of the cooling tank;

[0010] The cooling box is hollow inside and has ventilation openings on the left and right sides respectively;

[0011] The heat exchange coil is installed inside the cooling box, and the spray module is installed above the heat exchange coil and is used to spray water onto the heat exchange coil.

[0012] The input end of the heat exchange coil is connected to a water inlet pipe, and the output end of the heat exchange coil is connected to a water outlet pipe, which is connected to the circulating water tank.

[0013] The input end of the second water pump is connected to the outlet of the cooling tank, and the output end of the second water pump is connected to the spray module.

[0014] The input end of the first water pump is connected to the circulating water tank.

[0015] Preferably, a collecting pipe is provided in the cooling box, and the collecting pipe is connected to the output end of the second water pump via a circulating water pipe.

[0016] The spray module includes a spray pipe connected to the collection pipeline, and the spray pipe is equipped with a plurality of downward spray heads.

[0017] Preferably, the outlet of the cooling tank is higher than the inner bottom surface of the cooling tank, and the space between the outlet of the cooling tank and the inner bottom surface of the cooling tank forms a sedimentation space.

[0018] Preferably, a filter is provided between the outlet of the cooling tank and the input of the second water pump.

[0019] Preferably, the circulating water tank is positioned directly above the first water pump.

[0020] Preferably, a number of corrugated baffles are arranged from front to back on the right side of the cooling box;

[0021] A wave-shaped water-blocking channel is formed between the front and rear wave-shaped water-blocking plates.

[0022] Preferably, the output end of the first water pump is connected to a connection pipeline that connects to an air compressor.

[0023] Preferably, the air cooler is a fan.

[0024] Compared with the prior art and traditional longitudinally arranged cooling equipment, this utility model has the following significant advantages:

[0025] In terms of structural layout, the problem of excessive height in traditional equipment is effectively solved. By placing the circulating water tank on the left side of the cooling box and the air cooler on the right side, and distributing the core components horizontally, the traditional vertical stacking layout is replaced, significantly reducing the overall height of the equipment. This design allows it to easily adapt to the limited height space in underground coal mines, enabling smooth entry and installation in both old mine shafts and narrow tunnels, reducing the difficulty of equipment access and ensuring the normal progress of underground operations. At the same time, the horizontal layout lowers the equipment's center of gravity, improving stability on uneven underground surfaces, reducing safety hazards during transportation and use, and facilitating maintenance and repair by operators in confined spaces, thus improving maintenance convenience.

[0026] Regarding water utilization and system stability, the problem of impurity blockage has been successfully avoided. The equipment is equipped with an independent circulating water tank, changing the traditional operation method of directly connecting the cooler to mine well water. This allows cooling water to circulate within a closed loop consisting of the circulating water tank, heat exchange coils, and spray modules, reducing dependence on mine well water. This not only avoids pipe blockage and reduced heat exchange efficiency caused by impurities such as silt and rock fragments from the well water entering the system, but also reduces the risk of air compressor overheating and shutdown due to blockage, decreasing equipment maintenance frequency and costs, and ensuring the continuous and stable operation of the air compressor.

[0027] In terms of heat dissipation efficiency, a highly efficient composite heat dissipation mechanism has been formed. The ventilation ports on both sides of the cooling box, together with the air cooler on the right side, provide good airflow conditions inside the box; the spray module above the heat exchange coil can directly spray onto the coil, combined with the closed-loop cooling water, to achieve multiple heat dissipation effects of "spray cooling + air cooling + coil heat exchange", which can quickly remove the heat generated by the air compressor, significantly improve the cooling efficiency of compressed air and lubricating oil, and ensure that the equipment maintains a suitable operating temperature in the closed environment of the well. Attached Figure Description

[0028] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0029] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0030] Figure 3 This is the third three-dimensional structural schematic diagram of the present invention;

[0031] Figure 4 This is a partial cross-sectional structural diagram of the present invention;

[0032] Figure 5 This is a schematic diagram of the wavy water-blocking plate component in this utility model. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0036] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0038] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0039] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0040] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0041] See Figures 1-5 A circulating water cooling device for underground coal mine equipment includes a cooling tank 10, a circulating water tank 20, a first water pump 30, a heat exchange coil, a second water pump 50, an air cooler 60, and a spray module 70.

[0042] The circulating water tank 20 is located on the left side of the cooling tank 10, and the air cooler 60 is located on the right side of the cooling tank 10.

[0043] The cooling box 10 is hollow inside and has ventilation openings on the left and right sides respectively;

[0044] The heat exchange coil is installed inside the cooling box 10, and the spray module 70 is installed above the heat exchange coil and is used to spray water onto the heat exchange coil.

[0045] The input end of the heat exchange coil is connected to the water inlet pipe 510, and the output end of the heat exchange coil is connected to the water outlet pipe 520. The water outlet pipe 520 is connected to the circulating water tank 20.

[0046] The input end of the second water pump 50 is connected to the outlet of the cooling tank 10, and the output end of the second water pump 50 is connected to the spray module 70.

[0047] The input end of the first water pump 30 is connected to the circulating water tank 20.

[0048] The working principle of this circulating water cooling equipment used in underground coal mine equipment is as follows:

[0049] When the equipment is running, the medium that needs to be cooled (such as compressed air from the air compressor or lubricating oil) enters the heat exchange coil set in the cooling box 10 through the water inlet pipe 510. During the flow process in the heat exchange coil, the heat of the medium is transferred to the coil wall.

[0050] The ventilation openings on both sides of the cooling tank 10 form airflow channels. The air cooler 60 on the right side operates, accelerating the airflow within the cooling tank 10. As the airflow passes through the heat exchange coils, it carries away some heat, achieving initial air cooling. Simultaneously, the spray return water collected at the bottom of the cooling tank 10 is transported to the spray module 70 by the second water pump 50. The spray module 70 evenly sprays water onto the surface of the heat exchange coils. During the evaporation or flow of the water on the coil surface, it further absorbs heat, enhancing the heat dissipation effect. The spray water that has completed heat exchange falls to the bottom of the cooling tank 10 and can be drawn back by the second water pump 50 for recycling.

[0051] After the aforementioned dual cooling process, the temperature of the medium inside the heat exchange coil is significantly reduced. The cooled medium is then output from the heat exchange coil and enters the circulating water tank 20 via the outlet pipe 520. Subsequently, the cooled medium in the circulating water tank 20 is transported back to the air compressor under the drive of the first water pump 30, continuing to participate in the equipment's operating cycle. This achieves continuous and efficient cooling of the underground air compressor in the coal mine, ensuring stable equipment operation.

[0052] In this invention, the cooling box 10 is also connected to a water supply pipe to ensure that there is always sufficient spray water in the cooling box 10 for spraying.

[0053] See Figure 4 A collecting pipe 540 is provided inside the cooling tank 10. The collecting pipe 540 is connected to a circulating water pipe 530 at the output end of the second water pump 50. The spray module 70 includes spray pipes 700 interconnected with the collecting pipe 540. Each spray pipe 700 is equipped with several downward spray heads 710. The collecting pipe 540 is connected to the circulating water pipe 530 at the output end of the second water pump 50, which can concentrate and distribute the water flow delivered by the second water pump, ensuring that the water flow is evenly distributed to each spray pipe 700. This avoids the problem of insufficient local spraying caused by unstable water pressure or uneven water flow distribution, and provides a foundation for the stable operation of the subsequent spray heads 710. The spray pipe 700 in the spray module 70 is connected to the collecting pipe 540, which introduces the collected water flow into the pipe body. Several downward-spraying spray heads 710 installed on the spray pipe 700 transform the water flow into uniform, fine droplets or a water curtain, precisely and comprehensively covering the surface of the heat exchange coil below. This design increases the contact area between the water flow and the heat exchange coil, accelerating the heat exchange rate and enhancing the cooling effect on the medium inside the heat exchange coil. Furthermore, the coordinated operation of multiple spray heads ensures that all areas of the heat exchange coil are adequately sprayed, preventing localized overheating and further improving the uniformity and efficiency of cooling.

[0054] In this invention, the outlet of the cooling tank 10 is higher than the inner bottom surface of the cooling tank 10, and the space between the outlet of the cooling tank 10 and the inner bottom surface of the cooling tank 10 forms a sedimentation space. This sedimentation space not only performs preliminary purification of the spray return water collected at the bottom of the cooling tank 10, but also effectively filters impurities when well water is added. Mud, sand, rock fragments, and other impurities in the well water enter the sedimentation space and naturally settle to the bottom under gravity. Because the outlet of the cooling tank 10 is higher than the inner bottom surface, these settled impurities are prevented from being drawn up by the second water pump 50.

[0055] In this invention, a filter is installed between the outlet of the cooling tank 10 and the input of the second water pump 50. Although the sedimentation space can remove most of the larger particles of impurities such as silt and rock fragments from the well water through gravity settling, a small amount of fine suspended impurities may still flow with the water to the outlet. The filter can further filter these fine impurities, intercepting them before they enter the second water pump 50. This not only effectively prevents fine impurities from entering the interior of the second water pump 50, reducing the probability of pump failure due to impurity wear and extending the pump's service life, but also prevents these impurities from entering the circulating water pipe 530, the collecting pipe 540, and the spray module 70, further reducing the risk of spray head 710 blockage, ensuring that the spray water flow remains uniform and stable, and guaranteeing efficient cooling of the heat exchange coil.

[0056] See Figure 2 The circulating water tank 20 is positioned directly above the first water pump 30. From a water circulation efficiency perspective, the water in the circulating water tank can naturally flow to the first water pump directly below under gravity, reducing the resistance when the first water pump draws water and helping to improve the pump's suction efficiency. This allows cooling water to flow more smoothly from the circulating water tank into the pump, and then quickly to the air compressor, ensuring a timely supply of cooling medium. In terms of space utilization, this vertically aligned layout fully utilizes vertical space and complements the horizontal distribution of components such as the cooling tank and air cooler, making the entire equipment structure more compact. In the confined space of underground coal mines, this further saves installation floor space and improves space utilization. Simultaneously, this layout reduces the complexity of the water circulation pipeline, shortens the connecting pipeline length between the circulating water tank and the first water pump, and reduces pipe bends. This not only reduces energy loss during water transport but also facilitates pipeline installation and maintenance, indirectly improving the stability of equipment operation.

[0057] See Figure 4 and Figure 5 The cooling tank 10 has several wavy baffle plates 80 arranged from front to back on its right side; a wavy water-blocking channel 800 is formed between two wavy baffle plates 80. In terms of water-blocking effect, the wavy baffle plates 80 can effectively block water mist and droplets generated during spraying. When the spray module 70 sprays water onto the heat exchange coil, some water will atomize or splash. The wavy structure of the wavy water-blocking channel 800 increases the flow path of water mist and droplets, prolonging their residence time in the channel, causing most of the water mist to condense into droplets and flow back to the bottom of the cooling tank 10, reducing water loss from the vents with the airflow, ensuring a stable water volume in the cooling tank, and continuously providing sufficient water for the spraying system.

[0058] See Figure 2 The output end of the first water pump 30 is connected to a connection pipe 40 that is connected to an air compressor.

[0059] In this utility model, the air cooler 60 is a fan.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A recirculating water cooling apparatus for use with underground coal mining equipment characterised in that: It includes a cooling tank (10), a circulating water tank (20), a first water pump (30), a heat exchange coil, a second water pump (50), an air cooler (60), and a spray module (70). The circulating water tank (20) is located on the left side of the cooling tank (10), and the air cooler (60) is located on the right side of the cooling tank (10). The cooling box (10) is hollow inside and has ventilation openings on the left and right sides respectively; The heat exchange coil is disposed inside the cooling box (10), and the spray module (70) is disposed above the heat exchange coil and is used to spray the heat exchange coil. The heat exchange coil is connected to an inlet pipe (510) at its input end and to an outlet pipe (520) at its output end. The outlet pipe (520) is connected to the circulating water tank (20). The input end of the second water pump (50) is connected to the outlet of the cooling tank (10), and the output end of the second water pump (50) is connected to the spray module (70). The input end of the first water pump (30) is connected to the circulating water tank (20).

2. A recirculating water cooling apparatus for use with an underground coal mining installation according to claim 1 wherein: A manifold (540) is provided inside the cooling tank (10), and the manifold (540) is connected to the output end of the second water pump (50) via a circulating water pipe (530). The spray module (70) includes a spray pipe (700) connected to the collection pipeline (540), and the spray pipe (700) is equipped with a plurality of downward spray heads (710).

3. A recirculating water cooling apparatus for use with an underground coal mining apparatus as defined in claim 1, characterised in that: The outlet of the cooling tank (10) is higher than the inner bottom surface of the cooling tank (10), and the space between the outlet of the cooling tank (10) and the inner bottom surface of the cooling tank (10) forms a sedimentation space.

4. A recirculating water cooling apparatus for use with an underground coal mining apparatus as defined in claim 1, characterised in that: A filter is provided between the outlet of the cooling tank (10) and the input of the second water pump (50).

5. A recirculating water cooling apparatus for use with an underground coal mining apparatus as defined in claim 1, characterised in that: The circulating water tank (20) is positioned directly above the first water pump (30).

6. A recirculating water cooling apparatus for use with an underground coal mining apparatus as defined in claim 1, characterised in that: Several wavy baffle plates (80) are arranged from front to back on the right side of the cooling box (10). A wave-shaped water-blocking channel (800) is formed between the two wave-shaped water-blocking plates (80).

7. A recirculating water cooling apparatus for use with underground coal mining equipment as defined in claim 1, characterised in that: The output end of the first water pump (30) is connected to a connecting pipe (40) that is connected to an air compressor.

8. A recirculating water cooling apparatus for use with an underground coal mining apparatus as defined in claim 1, characterised in that: The air cooler (60) is a fan.

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