External evaporative cooling device of ball mill

Abstract

The utility model relates to an external evaporative cooling device of a ball mill, and belongs to the technical field of ball mill auxiliary devices, the external evaporative cooling device comprises a plurality of atomizing nozzles which are located on the outer side of a ball mill body and do not make contact with the outer side wall of the ball mill body, and the atomizing nozzles face the outer side wall of the ball mill; the atomizing nozzles are communicated with pressurizing assemblies used for pressurizing cooling water, and the pressure of the cooling water entering the atomizing nozzles is larger than or equal to 1 MPa. The device has the effect of reducing the possibility of water resource waste.

Description

Technical Field

[0001] The present application relates to the technical field of ball mill auxiliary devices, and in particular to an external evaporative cooling device for a ball mill. Background Art

[0002] The ball mill is a widely used material crushing equipment. The rotation of the grinding barrel drives the movement of the grinding body and the material inside, thereby crushing large particles of material through the extrusion of the grinding body and the material. Since a large amount of heat is generated by the extrusion friction, this part of the heat can only be dissipated outward through the outer wall of the mill. When the temperature of the ball mill is too high, it will affect the normal operation of the ball mill, so the outer wall of the ball mill needs to be cooled.

[0003] A common cooling method is covering water cooling, that is, pouring a large amount of cooling water on the cylinder wall. When the water flows through the cylinder wall, the specific heat capacity of the water takes away the heat of the outer wall of the ball mill, thereby cooling the outer wall of the ball mill, which may easily lead to the possibility of wasting water resources. Utility Model Content

[0004] In order to reduce the possibility of water resource waste, the present application provides an external evaporative cooling device for a ball mill.

[0005] The present application provides a ball mill external evaporative cooling device adopts the following technical solution:

[0006] A ball mill external evaporative cooling device comprises a plurality of atomizing nozzles located outside a ball mill body and not in contact with the outer side wall of the ball mill body, the atomizing nozzles face the outer side wall of the ball mill body, and the atomizing nozzles are all connected to a pressurizing component for pressurizing cooling water, and the pressure of cooling water entering the atomizing nozzles is ≥1MPa.

[0007] By adopting the above technical solution, the pressurizing component pressurizes the cooling water and transports the pressurized cooling water to each atomizing nozzle. At this time, the cooling water sprayed out by the atomizing nozzle is in the form of water mist that is easy to vaporize, so it vaporizes instantly when it contacts the high-temperature outer wall of the ball mill body, and takes away the heat on the outer wall of the ball mill body. The vaporization formula of water is Q=CM△T+△Q, where △Q is the latent heat of vaporization of water, and the liquid heat absorption formula of water is Q=CM△T. Therefore, the vaporization heat absorption efficiency of water is much higher than the liquid heat absorption of water, which makes it easy to reduce the possibility of water resource waste while improving the cooling efficiency.

[0008] Optionally, the atomizing nozzle is configured as a ring with a diameter larger than the outer diameter of the ball mill body, the atomizing nozzle is sleeved on the ball mill body and does not contact the outer side wall of the ball mill body, and a support rod is fixedly connected to the lower side of the atomizing nozzle.

[0009] By adopting the above technical scheme, when the pressurized cooling water is sprayed out through the atomizing head, the annular atomizing nozzle allows the cooling water in mist to be sprayed on the outer wall of the ball mill body along the circumference of the outer wall of the ball mill body, thereby further facilitating the cooling of the outer wall of the ball mill body and further reducing the possibility of wasting water resources.

[0010] Optionally, the pressurizing component includes a high-pressure water tank, one side of the high-pressure water tank is fixedly connected and connected to a connecting pipe connected to the atomizing nozzles, one side of the high-pressure water tank is equipped with an air compressor connected to the interior of the high-pressure water tank, and a stepless flow valve is installed on the connecting pipe.

[0011] By adopting the above technical solution, the air compressor pressurizes the high-pressure water tank, so that the cooling water in the high-pressure water tank is always kept in a compressed state. When the outer wall of the ball mill body needs to be cooled, the stepless flow valve is opened. At this time, the pressurized cooling water enters the atomizing nozzle through the connecting pipe, thereby facilitating the cooling of the outer wall of the ball mill body and reducing the possibility of water resource waste.

[0012] Optionally, the diameter of droplets sprayed by the atomizing nozzle is ≤1000 μm.

[0013] By adopting the above technical solution, when the droplet diameter is below 1000μm, the cooling water sprayed from the atomizing nozzle is in the form of water mist. When the droplets move to the surface of the outer wall of the ball mill body, they are rapidly vaporized due to the high temperature, thereby facilitating the rapid removal of heat on the outer wall of the ball mill body, facilitating the cooling of the outer wall of the ball mill body, and reducing the possibility of water resource waste.

[0014] Optionally, one side of the ball mill body is provided with a plurality of temperature probes along the length direction of the ball mill body and used to measure the temperature of the outer wall of the ball mill body, both ends of the outer side of the ball mill body are sleeved and rotatably connected with bearings, and the side where the bearings are close to each other is provided with fixing parts for fixing the temperature probes.

[0015] By adopting the above technical solution, the temperature probe is fixed on the bearing through the fixing part. When the temperature probe detects that the outer wall of the ball mill body needs to be cooled, the air compressor pressurizes the high-pressure water tank and drives the stepless flow valve to open. At this time, the pressurized cooling water enters the atomizing nozzle through the connecting pipe, so as to facilitate the monitoring of the temperature on the outer wall of the ball mill body and timely cool down the outer wall of the ball mill body, thereby improving the cooling efficiency.

[0016] Optionally, the fixing member includes a connecting rod located at the upper end of the side where the bearings are close to each other, the connecting rod is parallel to the length direction of the ball mill body and the end is fixedly connected to the side wall of the bearing, and the temperature probes are fixedly connected to the lower side of the connecting rod and face the side wall of the ball mill body.

[0017] By adopting the above technical solution, the temperature probe is installed on the bearing through the connecting rod, so that multiple temperature probes can detect the outer wall of the ball mill body in the length direction of the ball mill body, thereby facilitating the technology to drive the atomizing nozzle to cool the side wall of the ball mill body and improve the cooling efficiency.

[0018] Optionally, the temperature probe is radio-connected to a receiving controller, and the receiving controller is radio-connected to the stepless flow valve.

[0019] By adopting the above technical solution, when the temperature probe detects that the outer wall of the ball mill body needs to be cooled, the electrical signal is transmitted to the receiving controller. After receiving the electrical signal, the receiving controller drives the stepless flow valve to open. At this time, the pressurized cooling water enters the atomizing nozzle through the connecting pipe, which is convenient for cooling the side wall of the ball mill body. When the temperature detected by the temperature probe drops to a temperature that does not require cooling, the electrical signal is transmitted to the receiving controller. At this time, the receiving controller controls the stepless flow valve to close, which is convenient for cooling the side wall of the ball mill body according to the temperature technology of the side wall of the ball mill body, thereby improving the cooling efficiency while reducing the possibility of water waste.

[0020] Optionally, the temperature probe is set as an infrared temperature measuring probe, and the distance between the temperature probe and the outer side wall of the ball mill body is set to be ≥50 mm.

[0021] By adopting the above technical solution, an infrared temperature measuring probe is selected to detect the temperature of the side wall of the ball mill body, thereby facilitating temperature detection while maintaining a certain distance from the side wall of the ball mill body, reducing the possibility of the temperature probe directly contacting and being damaged by the rotating side wall of the ball mill body, and at the same time reducing the possibility of inaccurate temperature measurement due to the small distance between the temperature probe and the side wall of the ball mill body, thereby improving the temperature measurement accuracy.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The pressurizing component pressurizes the cooling water and transports the pressurized cooling water to each atomizing nozzle. At this time, the cooling water sprayed by the atomizing nozzle is in the form of water mist that is easy to vaporize, so it vaporizes instantly when it contacts the high-temperature outer wall of the ball mill body, and takes away the heat on the outer wall of the ball mill body. The vaporization formula of water is Q=CM△T+△Q, where △Q is the latent heat of vaporization of water, and the liquid heat absorption formula of water is Q=CM△T. Therefore, the vaporization heat absorption efficiency of water is much higher than the liquid heat absorption of water, which is convenient for improving the cooling efficiency while reducing the possibility of water resource waste;

[0024] 2. The temperature probe is fixed on the bearing through a fixing piece. When the temperature probe detects that the outer wall of the ball mill body needs to be cooled, the air compressor pressurizes the high-pressure water tank and drives the stepless flow valve to open. At this time, the pressurized cooling water enters the atomizing nozzle through the connecting pipe, so as to facilitate monitoring the temperature on the outer wall of the ball mill body and timely cool down the outer wall of the ball mill body, thereby improving the cooling efficiency;

[0025] 3. Use an infrared temperature probe to detect the temperature of the side wall of the ball mill body, so as to facilitate temperature detection while keeping a certain distance from the side wall of the ball mill body, reduce the possibility of the temperature probe directly contacting and being damaged by the rotating side wall of the ball mill body, and reduce the possibility of inaccurate temperature measurement due to the small distance between the temperature probe and the side wall of the ball mill body, thereby improving the temperature measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the external evaporative cooling device of the ball mill in the embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of the positional relationship between the stepless flow valve and the connecting pipe in the embodiment of the present application.

[0028] Explanation of the accompanying drawings: 1. Ball mill body; 11. Support platform; 12. Bearing; 2. Atomizing nozzle; 21. Blowing pipe; 22. Support rod; 3. Pressurizing assembly; 31. High-pressure water tank; 32. Mounting pipe; 33. Connecting pipe; 34. Air compressor; 341. Mounting platform; 35. Stepless flow valve; 4. Temperature probe; 41. Connecting rod; 5. Receiving controller. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The present application embodiment discloses an external evaporative cooling device for a ball mill. Figure 1 The ball mill includes a ball mill body 1 arranged in a horizontal direction, one end of the ball mill body 1 is tilted upward, and a horizontal support platform 11 is arranged at the lower side of the ball mill body 1. Both ends of the ball mill body 1 are sleeved and rotatably connected with bearings 12, and the lower ends of the bearings 12 are fixedly connected to the upper side of the support platform 11.

[0031] An external evaporative cooling device for a ball mill includes a plurality of annular atomizing nozzles 2, two of which are arranged perpendicular to the length direction of the ball mill body 1. The inner diameter of the atomizing nozzle 2 is larger than the outer diameter of the ball mill body 1 and is sleeved on the ball mill body 1.

[0032] Reference Figure 1A plurality of spray pipes 21 arranged opposite to each other and connected to the inside of the spray head 2 are fixedly connected on both sides of the atomizing nozzle 2, and the ends of the spray pipes 21 arranged opposite to each other away from the atomizing nozzle 2 are inclined in a direction away from each other and close to the outer wall of the ball mill body 1. Both ends of the lower side of the atomizing nozzle 2 are fixedly connected with vertical support rods 22, and the lower ends of the support rods 22 are fixedly connected to the upper side of the support platform 11.

[0033] The lower side of the atomizing nozzle 2 is connected to a pressurizing component 3 for pressurizing the cooling water. The pressure of the cooling water entering the atomizing nozzle 2 is ≥1MPa, and the diameter of the droplets sprayed from the spray pipe 21 is ≤1000μm, which is set to 200μm in the embodiment of the present application.

[0034] The pressurizing component 3 pressurizes the cooling water and transports the pressurized cooling water to each atomizing nozzle 2. At this time, the cooling water sprayed by the atomizing nozzle 2 is in the form of water mist that is easy to vaporize, so it vaporizes instantly when it contacts the high-temperature outer wall of the ball mill body 1, and takes away the heat on the outer wall of the ball mill body 1. Since the vaporization formula of water is Q=CM△T+△Q, where △Q is the latent heat of vaporization of water, and the liquid heat absorption formula of water is Q=CM△T, the vaporization heat absorption efficiency of water is much higher than the liquid heat absorption of water until the cooling is completed.

[0035] The annular atomizing nozzle 2 sprays cooling water in the form of mist on the outer wall of the ball mill body 1 along the circumference of the outer wall of the ball mill body 1, and when the diameter of the droplets is less than 1000 μm, the cooling water sprayed by the atomizing nozzle 2 is in the form of mist. When the droplets move to the surface of the outer wall of the ball mill body 1, they are rapidly vaporized by the high temperature, so as to quickly take away the heat on the outer wall of the ball mill body 1.

[0036] Reference Figure 1 and Figure 2 The pressurizing assembly 3 includes a high-pressure water tank 31 fixedly connected to the upper side of the support platform 11, and a mounting pipe 32 connected to the inside of the atomizing nozzle 2 is fixedly connected to the middle part of the lower side of the atomizing nozzle 2. A connecting pipe 33 connected to the inside of the high-pressure water tank 31 is fixedly connected to one side of the high-pressure water tank 31 close to the mounting rod, and one end of the connecting pipe 33 close to the mounting pipe 32 is fixedly connected and connected to the mounting pipe 32.

[0037] An air compressor 34 connected to the inside of the high-pressure water tank 31 is installed on one side of the high-pressure water tank 31. A mounting platform 341 is fixedly connected to the lower side of the air compressor 34. The lower end of the mounting platform 341 is fixedly connected to the upper side of the support bar, and a stepless flow valve 35 for controlling the opening and closing of the connecting pipe 33 is installed on the connecting pipe 33. When the pressure in the high-pressure water tank 31 is lower than 3.8MPa, the air compressor 34 pressurizes the high-pressure water tank 31. When the pressure in the high-pressure water tank 31 is higher than 4.2MPa, the air compressor 34 stops working, and the pressure of the cooling water moved to the atomizing nozzle 2 is always 4MPa.

[0038] The air compressor 34 pressurizes the high-pressure water tank 31 so that the cooling water in the high-pressure water tank 31 always remains in a compressed state. When the outer wall of the ball mill body 1 needs to be cooled, the stepless flow valve 35 is opened. At this time, the pressurized cooling water enters the atomizing nozzle 2 through the connecting pipe 33, which is convenient for cooling the outer wall of the ball mill body 1.

[0039] Reference Figure 1 A plurality of temperature probes 4 evenly distributed along the length direction of the ball mill body 1 are arranged on the upper side of the ball mill body 1. In the embodiment of the present application, the temperature probes 4 are arranged as infrared temperature measuring probes, and a fixing part for fixing the temperature probes 4 is arranged on the ball mill body 1. In the embodiment of the present application, the fixing part is arranged as a connecting rod 41 located on the side close to the bearings 12. The connecting rod 41 is located above the ball mill body 1 and arranged along the length direction of the ball mill body 1. The temperature probes 4 are all fixedly connected to one side of the connecting rod which is vertically arranged along the length direction.

[0040] The distance between the temperature probe 4 and the outer wall of the ball mill body 1 is ≥50 mm, which is set to 50 mm in the embodiment of the present application. The temperature probes 4 are all wirelessly connected to the same receiving controller 5, which is fixedly connected to the upper side of the support platform 11, and the stepless flow valve 35 is wirelessly connected to the receiving controller 5.

[0041] When the temperature probe 4 detects that the outer wall of the ball mill body 1 needs to be cooled, it transmits an electrical signal to the receiving controller 5. After receiving the electrical signal, the receiving controller 5 drives the stepless flow valve 35 to open, and can control the opening amplitude of the five-level flow valve according to the temperature. This is not the main invention point of the present application. At this time, the pressurized cooling water enters the atomizing nozzle 2 through the connecting pipe 33, which is convenient for cooling the side wall of the ball mill body 1.

[0042] When the temperature detected by the temperature probe 4 drops to a level where cooling is no longer required, an electrical signal is transmitted to the receiving controller 5, and the receiving controller 5 controls the stepless flow valve 35 to close, thereby cooling the side wall of the ball mill body 1 according to the temperature technology of the side wall of the ball mill body 1.

[0043] An infrared temperature measuring probe is used to detect the temperature of the side wall of the ball mill body 1, so that the temperature detection can be performed while keeping a certain distance from the side wall of the ball mill body 1, thereby reducing the possibility that the temperature probe 4 directly contacts and is damaged by the rotating side wall of the ball mill body 1, and at the same time reducing the possibility that the temperature measurement is inaccurate due to the small distance between the temperature probe 4 and the side wall of the ball mill body 1, thereby improving the temperature measurement accuracy.

[0044] The implementation principle of an external evaporative cooling device for a ball mill in an embodiment of the present application is as follows: when the temperature probe 4 detects that the outer wall of the ball mill body 1 needs to be cooled, the electrical signal is transmitted to the receiving controller 5. After receiving the electrical signal, the receiving controller 5 drives the stepless flow valve 35 to open. At this time, the pressurized cooling water enters the atomizing nozzle 2 through the connecting pipe 33 and is sprayed out. At this time, the mist-like cooling water is sprayed on the outer wall of the ball mill body 1 along the circumference of the outer wall of the ball mill body 1. When the droplets move to the surface of the outer wall of the ball mill body 1, they are subjected to high temperature and quickly vaporize, so as to quickly take away the heat on the outer wall of the ball mill body 1 until the cooling is completed.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An external evaporative cooling device for a ball mill, characterized in that: The invention comprises a plurality of atomizing nozzles (2) located outside a ball mill body (1) and not in contact with the outer wall of the ball mill body (1), the atomizing nozzles (2) facing the outer wall of the ball mill body (1), and the atomizing nozzles (2) are all connected to a pressurizing component (3) for pressurizing cooling water, and the pressure of cooling water entering the atomizing nozzles (2) is ≥1 MPa.

2. The external evaporative cooling device for a ball mill according to claim 1, characterized in that: The atomizing nozzle (2) is configured to be annular with a diameter greater than the outer diameter of the ball mill body (1); the atomizing nozzle (2) is sleeved on the ball mill body (1) and does not contact the outer wall of the ball mill body (1); and a support rod (22) is fixedly connected to the lower side of the atomizing nozzle (2).

3. The external evaporative cooling device for a ball mill according to claim 2, characterized in that: The pressurizing assembly (3) comprises a high-pressure water tank (31), one side of the high-pressure water tank (31) being fixedly connected to and in communication with a connecting pipe (33) that is in communication with the atomizing nozzles (2), one side of the high-pressure water tank (31) being equipped with an air compressor (34) that is in communication with the interior of the high-pressure water tank (31), and a stepless flow valve (35) being installed on the connecting pipe (33).

4. The external evaporative cooling device for a ball mill according to claim 3, characterized in that: The diameter of the mist droplets sprayed by the atomizing nozzle (2) is ≤1000 μm.

5. The external evaporative cooling device for a ball mill according to claim 4, characterized in that: A plurality of temperature probes (4) are provided on one side of the ball mill body (1) along the length direction of the ball mill body (1) and are used to measure the temperature of the outer wall of the ball mill body (1). Both ends of the outer side of the ball mill body (1) are sleeved and rotatably connected with bearings (12). A fixing piece for fixing the temperature probes (4) is provided on the side of the bearings (12) close to each other.

6. The external evaporative cooling device for a ball mill according to claim 5, characterized in that: The fixing member comprises a connecting rod (41) located at the upper end of the side where the bearings (12) are close to each other, the connecting rod (41) is parallel to the length direction of the ball mill body (1) and the end thereof is fixedly connected to the side wall of the bearing (12), and the temperature probes (4) are fixedly connected to the lower side of the connecting rod (41) and face the side wall of the ball mill body (1).

7. The external evaporative cooling device for a ball mill according to claim 6, characterized in that: The temperature probe (4) is connected to a receiving controller (5) by radio, and the receiving controller (5) is connected to the stepless flow valve (35) by radio.

8. The external evaporative cooling device for a ball mill according to claim 6, characterized in that: The temperature probe (4) is configured as an infrared temperature measuring probe, and the distance between the temperature probe (4) and the outer side wall of the ball mill body (1) is configured to be ≥50 mm.

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