Cooling system of coal mining conveying device for underground coal mine

Abstract

The utility model provides a cooling system of a coal mining conveying device for an underground coal mine. The cooling system comprises a water pump, an inlet end of which is connected to a motor and a speed reducer water jacket in the coal mine conveying device through a pipeline; one end of the air-water radiator is connected to the outlet end of the water pump through a pipeline; each electric three-way valve comprises a port A, a port B and a port C, the two electric three-way valves are arranged in the system, and the ports A of the two electric three-way valves are connected with each other; ports B of the two electric three-way valves are connected through the heat exchanger. The heat dissipation system of the coal mining conveying device for the underground coal mine solves the problems that existing equipment seriously depends on an external low-temperature water source, has certain potential safety hazards and cannot be used in an occasion with the high water source temperature, and has the advantages that the external water source does not need to be additionally connected, and water cannot be drained to the outside; and environmental damage and pollution to the working face can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation, in particular to a heat dissipation system for a coal mining and conveying device used in underground coal mines. Background Art

[0002] Currently, there are two common cooling methods for motors and reducers in coal mining and conveying systems: air cooling and open water jacket cooling. Air cooling utilizes the airflow generated by the device during operation, delivering cool air through ducts into the motor and reducer. Heat is dissipated to the outside air via heat sinks. Water jacket cooling involves wrapping a water jacket around the motor and reducer, drawing in external cooling water that flows through the jacket, where it continuously contacts the heat source to absorb heat, before being discharged outside. Each method has its advantages and disadvantages.

[0003] The main advantages of air cooling include simple structure, easy maintenance, low energy consumption, and suitability for cool, dry environments. The main disadvantages are relatively poor heat dissipation and limited application range.

[0004] The main advantages of water jacket cooling include: Advantages: excellent heat dissipation, unaffected by environmental factors, and wide applicability. Disadvantages: complex structure, difficult maintenance, and high energy consumption. Furthermore, current water jacket cooling methods rely heavily on an external low-temperature water source, which absorbs heat and directly discharges it onto the work surface. This not only significantly consumes water resources, but also impacts the work surface environment and poses certain safety risks. This cooling method is unsuitable for applications where the external water source temperature is high (>30°C). Utility Model Content

[0005] The main purpose of the utility model is to provide a heat dissipation system for a coal mining and conveying device in an underground coal mine, which overcomes the above technical problems.

[0006] In order to achieve the above purpose, the present invention proposes the following technical solutions:

[0007] A heat dissipation system for a coal mining and conveying device in an underground coal mine, comprising: a water pump, an air-water radiator, a heat exchanger and a chiller.

[0008] The inlet end of the water pump is connected to the motor and reducer water jacket in the coal mine conveying device through a pipeline to suck out the coolant after absorbing heat;

[0009] an air-to-water radiator, one end of which is connected to the outlet of the water pump via a pipeline;

[0010] An electric three-way valve, including ports A, B, and C. Two electric three-way valves are provided in the system, wherein port C of one of the electric three-way valves is connected to the other end of the air-water radiator via a pipeline, and port C of the other electric three-way valve is connected to the motor and reducer water jacket in the coal mine conveying device via a pipeline, and ports A of the two electric three-way valves are connected to each other;

[0011] Heat exchanger, the B ports of the two electric three-way valves are connected via the heat exchanger;

[0012] The chiller is connected to the heat exchanger.

[0013] Furthermore, a filtering device is included to filter out impurities that may exist in the pipeline medium.

[0014] Furthermore, an expansion tank is provided at the inlet end of the water pump.

[0015] Furthermore, a pressure gauge is provided at the outlet end of the water pump.

[0016] Furthermore, pressure sensors are provided at both the inlet and outlet ends of the water pump.

[0017] Furthermore, a temperature sensor is provided at the inlet end of the water pump for detecting the outlet water temperature of the water jacket in real time.

[0018] Furthermore, a temperature sensor is provided at the inlet end of the water pump for detecting the outlet water temperature of the water jacket in real time.

[0019] Furthermore, it also includes multiple automatic exhaust valves.

[0020] Furthermore, at least one manual exhaust valve is included.

[0021] Furthermore, a plurality of ball valves are provided in the pipeline as filling and discharging ports.

[0022] The utility model provides a heat dissipation system for a coal mining and conveying device in an underground coal mine, which solves the problems that the existing equipment is heavily dependent on external low-temperature water sources, has certain safety hazards, and cannot be used in situations where the water source temperature is high. It has the advantages of not requiring additional access to an external water source and not discharging water to the outside, thereby reducing environmental damage and pollution to the working surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1The utility model is a structural schematic diagram of a heat dissipation system of a coal mining and conveying device used in an underground coal mine.

[0025] The above drawings include the following reference numerals:

[0026] 1. Water pump; 2. Ball valve; 3. Expansion tank; 4. Automatic exhaust valve; 5. Pressure gauge; 6. Temperature sensor; 7. Pressure sensor; 8. Manual exhaust valve; 9. Air-to-water radiator; 10. Electric three-way valve; 11. Heat exchanger; 12. Chiller; 13. Filter device. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. 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.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0030] Reference below Figure 1 , the utility model is further described:

[0031] A heat dissipation system for a coal mining and conveying device in an underground coal mine, comprising: a water pump 1, an air-water radiator 9, a heat exchanger 11 and a chiller 12.

[0032] The inlet end of the water pump 1 is connected to the motor and reducer water jacket in the coal mine conveying device through a pipeline to suck out the cooling liquid after absorbing heat;

[0033] An air-water radiator 9, one end of which is connected to the outlet of the water pump 1 through a pipeline;

[0034] The water pump 1 provides the power source, sucks out the heat-absorbing coolant from the coal mine conveying device motor and reducer water jacket, and then sends it to the air-water radiator 9 for heat dissipation. After the coolant temperature drops, it is sent back to the motor and reducer water jacket for the next cycle.

[0035] The electric three-way valve 10 includes ports A, B, and C. Two electric three-way valves 10 are provided in the system, wherein the port C of one of the electric three-way valves 10 is connected to the other end of the air-water radiator 9 via a pipeline, and the port C of the other electric three-way valve 10 is connected to the motor and reducer water jacket in the coal mine conveying device via a pipeline, and the ports A of the two electric three-way valves 10 are connected to each other;

[0036] Heat exchanger 11, the B ports of the two electric three-way valves 10 are connected via the heat exchanger 11;

[0037] When the control unit detects that the coolant temperature at the jacket outlet is low (≤30°C), it will control the electric three-way valve (10) baffle to move to the position of port B. At this time, ports A and C of the electric three-way valve 10 are connected, and port B is closed. The coolant does not flow through the chiller. When the coolant temperature at the jacket outlet gradually increases (>30°C), the control unit will control the electric three-way valve (10) baffle to move to position A. At this time, ports B and C of the three-way valve are connected, and port A is closed. At the same time, the control unit starts the chiller to start cooling. The compressor and evaporator fan of the chiller are both frequency-controlled, so that the coolant outlet water temperature at the evaporator-heat exchanger is maintained at around 30°C, thereby ensuring that the motor and reducer of the coal mining and conveying device of the coal mine are always in a suitable working environment.

[0038] In this embodiment, the heat exchanger 11 is a plate radiator.

[0039] Optionally, the heat exchanger 11 is a fin heat exchanger or a shell and tube heat exchanger.

[0040] The chiller 12 is connected to the heat exchanger 11 .

[0041] In this embodiment, a filtering device 13 is further included to filter out impurities that may exist in the pipeline medium.

[0042] In this embodiment, an expansion tank 3 is installed at the inlet of the water pump 1. This tank is primarily used to absorb and compensate for volume changes caused by thermal expansion and contraction of the system's coolant. While functioning as a water tank, it also regulates the system's static pressure. To prevent excessive gas in the system from affecting heat dissipation and causing cavitation, an automatic exhaust valve 4 and a manual exhaust valve 8 are included. A pressure gauge 5 is used to monitor the pump's outlet pressure locally, and a ball valve 2 serves as the system's filling and discharge ports.

[0043] In this embodiment, a pressure gauge 5 is provided at the outlet end of the water pump 1 .

[0044] In this embodiment, pressure sensors 7 are provided at both the inlet and outlet ends of the water pump 1 .

[0045] In this embodiment, a temperature sensor 6 is further provided at the inlet end of the water pump 1 for detecting the outlet water temperature of the water jacket in real time.

[0046] Temperature sensor 6 transmits the real-time outlet water temperature of the water jacket to the corresponding control unit. Based on the outlet water temperature, the control unit adjusts the fan motor speed at air-to-water radiator 9 to achieve uniform temperature variation. Pressure sensors 7 are installed at the inlet and outlet of water pump 1 to monitor the real-time pressure at these locations and transmit it to the control unit to determine whether the system and the operating units of water pump 1 are functioning properly.

[0047] In this embodiment, a temperature sensor 6 is further provided at the inlet end of the water pump 1 for detecting the outlet water temperature of the water jacket in real time.

[0048] In this embodiment, a plurality of automatic exhaust valves 4 are also included.

[0049] In this embodiment, at least one manual exhaust valve 8 is also included.

[0050] In actual use, the automatic exhaust valve 4 is generally normally open, the exhaust volume is small, and there is a cut-off device, so that only gas can be discharged and liquid cannot be discharged.

[0051] The manual exhaust valve 8 is generally used for the first time and during maintenance. It is characterized by a large exhaust volume, which allows for quick exhaust and the flow of liquid at the same time.

[0052] Generally, when there are people present and a large amount of exhaust is required, the manual exhaust valve 8 is manually operated. After the people leave, the small amount of gas in the system is slowly discharged through the automatic exhaust valve.

[0053] In this embodiment, a plurality of ball valves 2 are provided in the pipeline to serve as liquid filling and discharge ports.

[0054] The cooling system for coal mining and conveying equipment in underground coal mines uses a circulating cooling method. It does not require an external water source and does not discharge water to the outside. This avoids water waste and reduces environmental damage and pollution to the working surface.

[0055] The heat dissipation system is equipped with a refrigeration unit and can be used in conditions where the ambient temperature does not exceed 45°C, allowing the water jacket cooling method to be used normally in high-temperature coal mine scenarios;

[0056] The cooling system can automatically turn on / off the refrigeration unit according to the coolant temperature. The refrigeration unit adopts variable frequency control to reduce energy consumption and effectively reduce noise.

[0057] In addition, the overall system is compact and can save some space compared to existing heat dissipation equipment.

[0058] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0059] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat dissipation system for a coal mining and conveying device in an underground coal mine, characterized in that: include: A water pump (1), the inlet end of which is connected to the motor and the reducer water jacket in the coal mine conveying device through a pipeline, sucks out the cooling liquid after absorbing heat; an air-water radiator (9), one end of which is connected to the outlet end of the water pump (1) through a pipeline; An electric three-way valve (10) includes an A port, a B port, and a C port. Two electric three-way valves (10) are provided in the system, wherein the C port of one electric three-way valve (10) is connected to the other end of the air-water radiator (9) via a pipeline, and the C port of the other electric three-way valve (10) is connected to the motor and the reducer water jacket in the coal mine conveying device via a pipeline, and the A ports of the two electric three-way valves (10) are connected to each other; A heat exchanger (11), wherein the B ports of the two electric three-way valves (10) are connected via the heat exchanger (11); A chiller (12) is connected to the heat exchanger (11).

2. A heat dissipation system for a coal mining and conveying device for an underground coal mine according to claim 1, characterized in that: The invention also comprises a filtering device (13) for filtering impurities that may exist in the pipeline medium.

3. The heat dissipation system for a coal mining and conveying device for an underground coal mine according to claim 1, characterized in that: An expansion tank (3) is provided at the inlet end of the water pump (1).

4. The heat dissipation system for a coal mining and conveying device for an underground coal mine according to claim 1, characterized in that: The outlet end of the water pump (1) is provided with a pressure gauge (5).

5. The heat dissipation system for coal mining and conveying equipment used in underground coal mines according to claim 1, characterized in that: Pressure sensors (7) are provided at both the inlet and outlet ends of the water pump (1).

6. The heat dissipation system for coal mining and conveying equipment used in underground coal mines according to claim 1, characterized in that: The inlet end of the water pump (1) is also provided with a temperature sensor (6) for detecting the outlet water temperature of the water jacket in real time.

7. The heat dissipation system for a coal mining and conveying device for an underground coal mine according to claim 1, characterized in that: The inlet end of the water pump (1) is also provided with a temperature sensor (6) for detecting the outlet water temperature of the water jacket in real time.

8. The heat dissipation system for a coal mining and conveying device for an underground coal mine according to claim 1, characterized in that: It also includes a plurality of automatic exhaust valves (4).

9. The heat dissipation system for a coal mining and conveying device for an underground coal mine according to claim 1, characterized in that: Also included is at least one manual exhaust valve (8).

10. The heat dissipation system for coal mining and conveying equipment used in underground coal mines according to claim 1, characterized in that: A plurality of ball valves (2) are provided in the pipeline as filling and discharging ports.

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