Dynamic adjustment cooling system for engineering machinery and coal mining equipment

Abstract

The invention discloses a dynamic adjustment cooling system for engineering machinery and coal mining equipment, and belongs to the technical field of cooling systems of coal mining equipment. Comprising a first cooling system and a second cooling system which are arranged independently and correspond to different working conditions. The different working conditions comprise an operation working condition and a transition walking working condition; under the working condition, the first controller starts the first input cooling unit and the first output heat dissipation unit to cool and dissipate heat of the plurality of working motor branches; the second controller starts a second input cooling unit and a second output heat dissipation unit to cool and dissipate heat of the working motor unit; and in the transition walking working condition, the second controller starts the second input cooling unit and the second output heat dissipation unit to cool and dissipate heat for the working motor unit. According to the invention, circulating water can be used for cooling a working motor, water flow distribution of each loop can be adjusted through feedback of each sensor, external water supply is switched in time for cooling, and normal work of equipment is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of the cooling system of coal mining equipment, and particularly relates to a dynamic regulation cooling system for construction machinery and coal mining equipment. Background Art

[0002] Coal mining equipment is the core technical carrier of modern open-pit mine mining, and its development has experienced a century-long leap from mechanization to intelligence. At present, replacing traditional diesel engines with high-voltage electric drive systems is the mainstream direction of products. When an electric drive coal mining device is working, since the heat generated by each working motor is very large, in order to ensure normal operation, it needs to be cooled.

[0003] When traditional coal mining equipment is working, external water sources are used for cooling, and the cooled hot water is usually sprayed on the coal mining face in the form of spray. This method not only wastes water resources, but also if there are many working devices or the water consumption of the devices is large, the water supply requirements for users are very demanding; all the cooling water is sprayed in the mining cave, which will also cause water accumulation in the mining cave, affecting the coal mining efficiency, and may seriously lead to safety accidents, with great safety risks. At the same time, if only circulating water is simply used for cooling, since the heat generated by the motors of coal mining equipment varies greatly under different working conditions, only designing according to the theoretical maximum heat generation of its extreme working conditions not only has few applicable situations, but also is uneconomical. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a dynamic regulation cooling system for construction machinery and coal mining equipment, which can not only use circulating water to cool the working motors, but also dynamically regulate the water flow distribution of each circuit; for extreme working conditions, it can switch to external water for cooling to ensure the normal operation of the equipment.

[0005] The present invention provides the following technical solutions: In the first aspect, a dynamic regulation cooling system for construction machinery is provided, including a first cooling system and a second cooling system that are independently arranged corresponding to different working conditions; the first cooling system includes a first controller and a first input cooling unit, a plurality of working motor branches, and a first output heat dissipation unit that are connected in sequence; the second cooling system includes a second controller and a second input cooling unit, a working motor unit, and a second output heat dissipation unit that are connected in sequence; The different working conditions include an operation working condition and a transfer walking working condition; In the operation working condition, the first controller starts the first input cooling unit and the first output heat dissipation unit to cool and dissipate heat for the plurality of working motor branches; the second controller starts the second input cooling unit and the second output heat dissipation unit to cool and dissipate heat for the working motor unit; During the transition walking condition, the second controller activates the second input cooling unit and the second output heat dissipation unit to cool and dissipate heat for the working motor unit; The first controller is also used to switch the cooling water to circulating water or external water according to the temperature of the cooling water in the first input cooling unit; The second controller is also used to switch the cooling water to circulating water or external water according to the temperature of the cooling water in the second input cooling unit.

[0006] As an optional technical solution of the present invention, both the first input cooling unit and the second input cooling unit include a first three-way ball valve, a cooling pump, and a first sensor connected in sequence; the input ends of the first three-way ball valve are respectively connected to the circulating water and the external water, the first controller or the second controller is connected to the first three-way ball valve, the cooling pump, and the first sensor, and the first controller or the second controller is used to control the rotation speed of the cooling pump and the first three-way ball valve to connect the circulating water or the external water according to the temperature data collected by the first sensor.

[0007] As an optional technical solution of the present invention, the first input cooling unit and the second input cooling unit further include a filter and a pressure reducing valve; the input end of the filter is connected to a cooling tank for storing circulating water, and the output end is connected to the first three-way ball valve for filtering the circulating water; the input end of the pressure reducing valve is connected to the cooling pump, and the output end is connected to the first sensor for controlling the water outlet pressure of the cooling pump.

[0008] As an optional technical solution of the present invention, both the first output heat dissipation unit and the second output heat dissipation unit include a radiator group, a third sensor, and a second three-way ball valve connected in sequence; the first controller or the second controller is connected to the radiator group for adjusting the working state of the radiators in the radiator group; the output ends of the second three-way ball valve are respectively connected to the cooling tank and the external water.

[0009] As an optional technical solution of the present invention, the first cooling system includes three working motor branches arranged in parallel, and each working motor branch includes a first working motor, a second sensor, and a throttle valve connected in sequence; the first controller is connected to the second sensor and the throttle valve, and the first controller is used to adjust the throttle valve opening size and the rotation speed of the cooling pump according to the branch temperature data collected by the second sensor.

[0010] As an optional technical solution of the present invention, the working motor unit includes a first working motor and a fourth sensor connected to each other; the second controller is connected to the fourth sensor and adjusts the rotation speed of the cooling pump according to the temperature data collected by the fourth sensor.

[0011] As an alternative technical solution of the present invention, a rotational speed sensor is provided inside the cooling pump for detecting whether the cooling pump reaches the maximum rotational speed.

[0012] In a second aspect, a coal mining equipment is provided, which applies the dynamic adjustment cooling system described in the first aspect.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The dynamic adjustment cooling system for construction machinery provided by the present invention cools the working motor through circulating water, which well avoids the problems of large water supply and excessive cooling water in the mining tunnel in the conventional external water solution; at the same time, through the mutually independent first cooling system and the second cooling system, the corresponding cooling water flow is matched for the working motor under different working conditions, reducing the use cost and making it more suitable for construction machinery under different working conditions; for extreme working conditions, external water supply can be switched in time for cooling to ensure the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the first cooling system in an embodiment of the present invention; Figure 2 is a schematic structural diagram of the second cooling system in an embodiment of the present invention.

[0015] The labels in the figure are: 201, cutting motor; 202, discharging motor; 203, transportation motor; 204, pumping station motor; 301, first sensor; 302, second sensor; 303, third sensor; 304, fourth sensor; 401, first three-way ball valve; 4011, first valve port of the first three-way ball valve; 4012, second valve port of the first three-way ball valve; 402, cooling pump; 403, throttle valve; 404, radiator group; 405, second three-way ball valve; 4051, first valve port of the second three-way ball valve; 4052, second valve port of the second three-way ball valve; 501, cooling tank; 502, filter; 503, pressure reducing valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0017] Embodiment 1 This embodiment provides a dynamic adjustment cooling system for construction machinery, as shown in Figure 1 and Figure 2As shown in the figure, it includes a first cooling system and a second cooling system that are independently arranged corresponding to different working conditions; the first cooling system includes a first controller, a first input cooling unit, several working motor branches, and a first output heat dissipation unit that are connected in sequence; the second cooling system includes a second controller, a second input cooling unit, a working motor unit, and a second output heat dissipation unit that are connected in sequence.

[0018] The different working conditions include an operation working condition and a transfer walking working condition.

[0019] During the operation working condition, the first controller starts the first input cooling unit and the first output heat dissipation unit to cool and dissipate heat for the several working motor branches; the second controller starts the second input cooling unit and the second output heat dissipation unit to cool and dissipate heat for the working motor unit.

[0020] During the transfer walking working condition, the second controller starts the second input cooling unit and the second output heat dissipation unit to cool and dissipate heat for the working motor unit.

[0021] The first controller is also used to switch the cooling water to circulating water or external water according to the temperature of the cooling water in the first input cooling unit.

[0022] The second controller is also used to switch the cooling water to circulating water or external water according to the temperature of the cooling water in the second input cooling unit.

[0023] Embodiment 2 Based on Embodiment 1, in this embodiment, as Figure 1 and 2 shown, both the first input cooling unit and the second input cooling unit include a first three-way ball valve 401, a cooling pump 402, and a first sensor 301 that are connected in sequence.

[0024] Furthermore, the input ends of the first three-way ball valve 401 are respectively connected to the circulating water and the external water. The first controller or the second controller is connected to the first three-way ball valve 401, the cooling pump 402, and the first sensor 301. The first controller or the second controller is used to control the rotation speed of the cooling pump 402 and the first three-way ball valve 401 to connect to the circulating water or the external water according to the temperature data collected by the first sensor 301.

[0025] The first input cooling unit and the second input cooling unit further include a filter 502 and a pressure reducing valve 503. The input end of the filter 502 is connected to a cooling tank 501 for storing circulating water, and the output end is connected to a first three-way ball valve 401, which is used to filter the circulating water to ensure the cleanliness of the circulating water flowing in the system and improve the reliability of the system; the input end of the pressure reducing valve 503 is connected to a cooling pump 402, and the output end is connected to a first sensor 301, which is used to control the pressure of the water output by the cooling pump 402 to ensure that the water pressure output by the cooling pump 402 does not exceed the rated value, and can also prevent the system pressure from being too high and damaging other components when the system is blocked and the pressure is built up due to pipeline blockage.

[0026] Both the first output heat dissipation unit and the second output heat dissipation unit include a radiator group 404, a third sensor 303, and a second three-way ball valve 405 connected in sequence. The first controller or the second controller is connected to the radiator group 404 for adjusting the working state of the radiators in the radiator group 404; the output end of the second three-way ball valve 405 is respectively connected to the cooling tank 501 and external water. The radiator group 404 includes at least two radiators, and the start and stop can be independently controlled.

[0027] In this embodiment, the first valve port 4011 of the first three-way ball valve and the first valve port 4051 of the second three-way ball valve are connected to the cooling tank 501, and the second valve port 4012 of the first three-way ball valve and the second valve port 4052 of the second three-way ball valve are connected to external water. The first controller or the second controller controls the opening and closing of the first valve port 4011 of the first three-way ball valve, the first valve port 4051 of the second three-way ball valve, the second valve port 4012 of the first three-way ball valve, and the second valve port 4052 of the second three-way ball valve to control the connection of the circulating water or external water.

[0028] The first cooling system includes three working motor branches arranged in parallel. Each working motor branch includes a first working motor, a second sensor 302, and a throttle valve 403 connected in sequence. The first controller is connected to the second sensor 302 and the throttle valve 403. The first controller is used to adjust the throttle valve opening size and the rotation speed of the cooling pump 402 according to the branch temperature data collected by the second sensor 302.

[0029] The working motor unit includes a first working motor and a fourth sensor 304 connected to each other. The second controller is connected to the fourth sensor 304 and adjusts the rotation speed of the cooling pump 402 according to the temperature data collected by the fourth sensor 304.

[0030] A rotation speed sensor is provided in the cooling pump 402 for detecting whether the cooling pump 402 reaches the maximum rotation speed. The rotation speed sensor is connected to the first controller or the second controller and can feedback the rotation speed to the first controller or the second controller in real time.

[0031] In this embodiment, the sensors in the first cooling system and the second cooling system can not only detect the water temperature and flow rate, but also detect the pressure. Once abnormal pressure is detected, such as pipeline blockage or leakage, an alarm will be sent in time to notify relevant personnel for handling.

[0032] In this embodiment, both the first controller and the second controller include a system control module, an operation module, and a storage module. The operation module receives the flow rate and water temperature conditions of each loop of the system collected by each sensor, and compares them with the system rated values. The system control module issues instructions on the rotation speed of the cooling pump 402, the opening degree of the throttle valve 403, and the number of working radiators in the radiator group 404 according to the comparison results. The storage module records the current total flow rate and the return water temperature of the system.

[0033] Working principle of the first cooling system: After the first cooling system is started, the cooling pump 402 is turned on, and the circulating water flows into the working motor on the working motor branch at the initially preset flow rate. At the same time, the first sensor 301 detects the inlet water temperature of the working motor. If the water temperature is lower than the rated value, the circulating water state is continued to be used. If the water temperature is higher than the rated value, it means that the circulating water state can no longer meet the requirements, and the first three-way ball valve 401 switches to the external water state for cooling. The second sensor 302 detects the outlet water temperature of the working motor in the working motor branch. If the water temperature of a certain branch is detected to be higher than the calibrated value, the throttle valve 403 of the corresponding branch will increase the valve opening, and at the same time, the cooling pump 402 will increase the rotation speed and the flow rate, that is, increase the water flow supply of the corresponding branch, so as to reduce the water temperature of the branch; on the contrary, if the second sensor 302 detects that the water temperature of a certain branch of the working motor in the working motor branch is lower than the calibrated value, the throttle valve 403 of the corresponding branch will decrease the valve opening, and at the same time, the cooling pump 402 will decrease the rotation speed and the flow rate, and reduce the water flow supply of the corresponding branch, so as to increase the water temperature of the branch. It is detected whether the cooling pump 402 has reached the maximum rotation speed. Once the maximum rotation speed is reached and a certain sensor in the system is still in a high-temperature state, it means that the current state can no longer reduce the temperature by adjusting the flow rate. At this time, the remaining non-working radiators in the radiator group 404 will participate in the work to reduce the system water temperature. Under the working conditions of extreme load, if all the radiators in the radiator group 404 participate in the work and there is still a sensor in a high-temperature state, then the first three-way ball valve 401 is connected to the external water state for cooling.

[0034] Working principle of the second cooling system: The working principle of the second cooling system is basically the same as that of the first cooling system. The only difference is that since there is only one working motor unit in the system, there is no need for a throttle valve 403 to control the flow rate. When any sensor in the second cooling system is in a high-temperature or low-temperature state, the flow rate is adjusted by adjusting the rotation speed of the cooling pump 402, and the rest will not be elaborated.

[0035] Embodiment 3 This embodiment provides a coal mining equipment, which applies the dynamic adjustment cooling system described in Embodiment 1 and Embodiment 2.

[0036] In this embodiment, the first working motor of the first cooling system adopts the cutting motor 201, the discharging motor 202 and the conveying motor 203. The second working motor of the second cooling system adopts the pumping station motor 204.

[0037] In this embodiment, the actual working conditions of the coal mining equipment include transfer walking and cutting coal mining. During transfer walking, only the pumping station motor 204 works, so only the second cooling system is turned on; during cutting coal mining, all motors are working, and at this time, both the first cooling system and the second cooling system need to be turned on.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0040] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A dynamically adjustable cooling system for engineering machinery, characterized in that: It includes a first cooling system and a second cooling system which are independently arranged and correspond to different working conditions; the first cooling system includes a first controller and a first input cooling unit, a plurality of working motor branches and a first output heat dissipation unit which are connected in sequence; the second cooling system includes a second controller and a second input cooling unit, a working motor unit and a second output heat dissipation unit which are connected in sequence; The different working conditions include operating conditions and transfer walking conditions; In the working condition, the first controller starts the first input cooling unit and the first output heat dissipation unit to cool and dissipate the plurality of working motor branches; the second controller starts the second input cooling unit and the second output heat dissipation unit to cool and dissipate the working motor unit; In the transition walking working condition, the second controller starts the second input cooling unit and the second output heat dissipation unit to cool and dissipate heat for the working motor unit; The first controller is also used to switch the cooling water to circulating water or external water according to the temperature of the cooling water in the first input cooling unit; The second controller is also used to switch the cooling water to circulating water or external water according to the temperature of the cooling water in the second input cooling unit.

2. The dynamically adjustable cooling system for engineering machinery according to claim 1, characterized in that: The first input cooling unit and the second input cooling unit both comprise a first three-way ball valve (401), a cooling pump (402) and a first sensor (301) which are connected in sequence; The input ends of the first three-way ball valve (401) are respectively connected to circulating water and external water, and the first controller or the second controller is connected to the first three-way ball valve (401), the cooling pump (402) and the first sensor (301). The first controller or the second controller is used to control the rotation speed of the cooling pump (402) and the connection of the first three-way ball valve (401) to circulating water or external water according to temperature data collected by the first sensor (301).

3. The dynamically adjustable cooling system for engineering machinery according to claim 2, characterized in that: The first input cooling unit and the second input cooling unit further include a filter (502) and a pressure reducing valve (503); The input end of the filter (502) is connected to a cooling box (501) for storing circulating water, and the output end is connected to a first three-way ball valve (401) for filtering the circulating water; The input end of the pressure reducing valve (503) is connected to the cooling pump (402), and the output end is connected to the first sensor (301), and is used to control the pressure of the water outlet of the cooling pump (402).

4. The dynamically adjustable cooling system for engineering machinery according to claim 3, characterized in that: The first output heat dissipation unit and the second output heat dissipation unit both comprise a radiator group (404), a third sensor (303) and a second three-way ball valve (405) which are connected in sequence; The first controller or the second controller is connected to the radiator group (404) and is used to adjust the working state of the radiators in the radiator group (404); The output ends of the second three-way ball valve (405) are respectively connected to the cooling box (501) and external water.

5. The dynamically adjustable cooling system for engineering machinery according to claim 1, characterized in that: The first cooling system comprises three working motor branches arranged in parallel, each working motor branch comprising a first working motor, a second sensor (302) and a throttle valve (403) connected in sequence; The first controller is connected to the second sensor (302) and the throttle valve (403), and is used to adjust the valve port size of the throttle valve (403) and the rotation speed of the cooling pump (402) according to the branch temperature data collected by the second sensor (302).

6. The dynamically adjustable cooling system for engineering machinery according to claim 1, characterized in that: The working motor unit comprises a first working motor and a fourth sensor (304) connected to each other; The second controller is connected to the fourth sensor (304) and adjusts the rotation speed of the cooling pump (402) according to the temperature data collected by the fourth sensor (304).

7. The dynamically adjustable cooling system for engineering machinery according to claim 1, characterized in that: A rotation speed sensor is provided inside the cooling pump (402) for detecting whether the cooling pump (402) has reached a maximum rotation speed.

8. A coal mining equipment, characterized in that: A dynamically adjustable cooling system according to any one of claims 1 to 7 is used.

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