Vertical mill hydraulic oil cooling device

Abstract

The utility model belongs to the technical field of vertical mills, and particularly relates to a vertical mill hydraulic oil cooling device which comprises a vertical mill main body, a hydraulic oil circulating pipeline is arranged on the surface of the vertical mill main body, and a hot air pipe is mounted on the surface of the lower end of the vertical mill main body. According to the vertical mill hydraulic oil cooling device, the frequency conversion fan is arranged to conduct air cooling on the cooling pipeline, heat emitted by the cooling pipeline is injected into the heat preservation cavity through airflow, the outer layer of the hot air pipe is sleeved with the heat preservation pipe through a double-shell ventilation heat preservation method, and therefore an interlayer gap filled with an air layer is formed in the heat preservation cavity; the hot air in the heat preservation cavity can form a heat insulation layer between the hot air pipe and the external environment, heat conduction and convection are reduced, hot air loss and the influence of the external environment on the temperature of the hot air pipe can be reduced, and the heat preservation performance of the hot air pipe is improved. And therefore, the cooling mechanism has the characteristics that the hydraulic oil can be conveniently subjected to air cooling, and meanwhile, heat energy can be conveniently recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mills, in particular to a hydraulic oil cooling device for a vertical mill. Background Art

[0002] Industrial vertical mills have the advantages of strong adaptability to materials, stable operation, simple process, high grinding efficiency, low energy consumption, simple operation, small equipment footprint, easy product fineness adjustment, etc. They are rapidly replacing traditional grinding processes and are widely used in power, metallurgy, non-mining and other industries. The design of the vertical mill hydraulic device mainly considers that when the vertical mill is started, the grinding roller can be lifted and started with light load, and grinding pressure is applied to the material during operation to grind the material, while also having the function of buffering and shock absorption.

[0003] A vertical mill hydraulic oil cooling device (publication number: CN204300046U) disclosed on the Chinese patent website solves the problem that the temperature in the vertical mill hydraulic device is generally high. In order to effectively protect the roller bearing, the traditional method uses water cooling to reduce the temperature, but the water that absorbs heat is directly discharged and not effectively utilized. However, the following problems still exist:

[0004] When the vertical mill is in use, hot air needs to be input into the interior of the vertical mill to reduce the internal humidity of the vertical mill and improve the heat utilization rate. However, depending on the raw materials to be processed and the grinding process, hot air of different temperatures needs to be injected into the vertical mill. The heat of the hot air flow for dissipating the hydraulic oil is unstable. After being directly input into the hot air pipe, it is easy to cause the temperature in the hot air pipe to fluctuate, and even affect the grinding of the raw materials. Utility Model Content

[0005] Based on the technical problem that the existing hydraulic oil cooling device cannot correctly recover the heat dissipation, the utility model proposes a vertical mill hydraulic oil cooling device.

[0006] The utility model proposes a vertical mill hydraulic oil cooling device, comprising a vertical mill body, a hydraulic oil circulation pipeline is arranged on the surface of the vertical mill body, a hot air pipe is installed on the lower end surface of the vertical mill body, a cooling mechanism is installed on the surface of the hydraulic oil circulation pipeline, and the cooling mechanism includes a cooling pipeline.

[0007] Preferably, the oil outlet surface of the hydraulic oil circulation pipeline is fixedly connected to the upper end opening of the cooling pipeline, the cooling pipeline is spiral, and the lower end outlet surface of the cooling pipeline is fixedly connected with an oil inlet pipe, the interior of the oil inlet pipe is connected to the oil outlet of the hydraulic oil circulation pipeline through the cooling pipeline, and the end of the oil inlet pipe is fixedly connected and connected to the oil inlet of the hydraulic oil circulation pipeline.

[0008] Through the above technical solution, the hydraulic oil circulation pipeline is extended outward by using the cooling pipeline, and the spiral design of the cooling pipeline is used to increase the residence time of the hydraulic oil in the hydraulic oil circulation pipeline in the cooling pipeline. The material of the cooling pipeline is steel pipe.

[0009] Preferably, a temperature sensor is installed on the surface of the oil inlet pipe, and a sleeve is fixedly mounted on the surface of the oil inlet pipe and the oil outlet surface of the hydraulic oil circulation pipeline. The sleeve is in the shape of a pipe with openings at both the upper and lower ends, and the cooling pipeline is located inside the sleeve.

[0010] Through the above technical solution, the cooling pipeline is wrapped with the sleeve, so that the heat emitted by the cooling pipeline can be collected easily.

[0011] Preferably, a variable frequency fan is installed on the inner wall of the upper end of the sleeve, and a heat preservation pipe is sleeved on the outer surface of the hot air pipe.

[0012] Through the above technical solution, the variable frequency fan and the temperature sensor are connected to the control unit of the vertical mill body, so that the wind speed of the variable frequency fan can be adjusted according to the heat dissipation effect monitored by the temperature sensor.

[0013] Preferably, an insulation cavity is formed between the inner wall of the insulation pipe and the outer surface of the hot air pipe, a connecting rod is fixedly connected to the inner wall of the insulation pipe, the end of the connecting rod is fixedly connected to the outer surface of the hot air pipe, and the upper surface of the insulation pipe is fixedly connected and communicated with the lower surface of the sleeve.

[0014] Through the above technical solution, the insulation pipe and the hot air pipe are connected by a connecting rod, which facilitates the installation and fixation of the insulation pipe and reduces the obstruction of the connecting rod to the gas flow in the insulation cavity.

[0015] Preferably, a heat dissipation hole is formed on the outer surface of the sleeve, a cover plate is hingedly connected to the outer opening surface of the heat dissipation hole, and the outer surfaces of the plurality of cover plates are fixedly connected to connecting rods.

[0016] Through the above technical solution, when the airflow of the variable frequency fan increases, the cover plate is deflected and the heat dissipation holes are opened, thereby facilitating increasing the cooling effect on the cooling pipeline.

[0017] The beneficial effects of the present invention are:

[0018] A variable frequency fan is provided to cool the cooling pipeline by air, and the heat emitted by the cooling pipeline is injected into the insulation cavity through the airflow. The double-shell ventilation insulation method is utilized to sleeve the insulation pipe on the outer layer of the hot air pipe, so that the insulation cavity forms an interlayer gap filled with an air layer. The hot air in the insulation cavity can form an insulating layer between the hot air pipe and the external environment, thereby reducing the conduction and convection of heat. This can reduce the loss of hot air and the influence of the external environment on the temperature of the hot air pipe, and improve the insulation performance of the hot air pipe, so that the cooling mechanism has the characteristics of being convenient for air cooling of the hydraulic oil and recycling of heat energy at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a vertical mill hydraulic oil cooling device proposed by the utility model;

[0020] Figure 2 This is a cross-sectional view of the sleeve structure of a vertical mill hydraulic oil cooling device proposed by the utility model;

[0021] Figure 3 An exploded diagram of the insulation pipe structure of a vertical mill hydraulic oil cooling device proposed by the utility model.

[0022] In the figure: 1. Vertical mill body; 2. Hydraulic oil circulation pipeline; 3. Hot air pipe; 4. Cooling pipeline; 41. Oil inlet pipe; 42. Temperature sensor; 43. Sleeve; 44. Frequency conversion fan; 45. Insulation pipe; 46. Insulation chamber; 47. Connecting rod; 5. Cover plate; 6. Connecting rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-Figure 3 A vertical mill hydraulic oil cooling device comprises a vertical mill body 1, a hydraulic oil circulation pipeline 2 is arranged on the surface of the vertical mill body 1, a hot air pipe 3 is installed on the lower end surface of the vertical mill body 1, a cooling mechanism is installed on the surface of the hydraulic oil circulation pipeline 2, and the cooling mechanism comprises a cooling pipeline 4.

[0025] In order to cool the hydraulic oil, the oil outlet surface of the hydraulic oil circulation pipeline 2 is fixedly connected to the upper end opening of the cooling pipeline 4. The cooling pipeline 4 is spirally shaped. The lower end outlet surface of the cooling pipeline 4 is fixedly connected with an oil inlet pipe 41. The interior of the oil inlet pipe 41 is connected to the oil outlet of the hydraulic oil circulation pipeline 2 through the cooling pipeline 4. The end of the oil inlet pipe 41 is fixedly connected and connected to the oil inlet of the hydraulic oil circulation pipeline 2. The hydraulic oil circulation pipeline 2 is extended outward by the cooling pipeline 4 and spirally connected through the cooling pipeline 4. The design increases the residence time of the hydraulic oil in the hydraulic oil circulation pipeline 2 in the cooling pipeline 4. The cooling pipeline 4 is made of steel pipe. A temperature sensor 42 is installed on the surface of the oil inlet pipe 41. The surface of the oil inlet pipe 41 and the surface of the oil outlet of the hydraulic oil circulation pipeline 2 are fixedly sleeved with a sleeve 43. The sleeve 43 is in the shape of a pipe with openings at both the upper and lower ends. The cooling pipeline 4 is located inside the sleeve 43. The sleeve 43 is used to wrap the cooling pipeline 4, so as to facilitate the collection of heat emitted by the cooling pipeline 4.

[0026] In order to recover the heat energy of the hydraulic oil, a variable frequency fan 44 is installed on the inner wall of the upper end of the sleeve 43, and an insulation pipe 45 is sleeved on the outer surface of the hot air pipe 3. The variable frequency fan 44 and the temperature sensor 42 are connected to the control unit of the vertical mill body 1, so that the wind speed of the variable frequency fan 44 can be adjusted according to the heat dissipation effect monitored by the temperature sensor 42. An insulation cavity 46 is formed between the inner wall of the insulation pipe 45 and the outer surface of the hot air pipe 3. A connecting rod 47 is fixedly connected to the inner wall of the insulation pipe 45, and the end of the connecting rod 47 is fixedly connected to the outer surface of the hot air pipe 3. The upper surface of the insulation pipe 45 is fixedly connected and communicated with the lower surface of the sleeve 43. The insulation pipe 45 and the hot air pipe 3 are connected by the connecting rod 47, so that the insulation pipe 45 is easy to install and fix, and at the same time, the obstruction of the connecting rod 47 to the gas flow in the insulation cavity 46 is reduced.

[0027] The cooling pipeline 4 is cooled by air by setting a variable frequency fan 44, and the heat emitted by the cooling pipeline 4 is injected into the insulation cavity 46 through the airflow. The double-shell ventilation insulation method is used to sleeve the insulation pipe 45 on the outer layer of the hot air pipe 3, so that the insulation cavity 46 forms an interlayer gap filled with an air layer. The hot air in the insulation cavity 46 can form an insulating layer between the hot air pipe 3 and the external environment, reducing the conduction and convection of heat. This can reduce the loss of hot air and the influence of the external environment on the temperature of the hot air pipe 3, and improve the insulation performance of the hot air pipe 3, so that the cooling mechanism has the characteristics of being convenient for air cooling of the hydraulic oil and facilitating the recycling of heat energy.

[0028] A heat dissipation hole is arranged on the outer surface of the sleeve 43, and a cover plate 5 is hinged on the outer opening surface of the heat dissipation hole. The outer surfaces of multiple cover plates 5 are fixedly connected with connecting rods 6. When the airflow of the variable frequency fan 44 increases, the cover plate 5 deflects and opens the heat dissipation hole, thereby facilitating increasing the cooling effect on the cooling pipeline 4.

[0029] Working principle:

[0030] When in use, the hydraulic oil passes through the hydraulic oil circulation pipeline 2, the cooling pipeline 4 and the oil inlet pipe 41 in sequence. When the temperature of the hydraulic oil is too high, the temperature sensor 42 transmits a high temperature signal to the vertical mill body 1, and the vertical mill body 1 controls the variable frequency fan 44 to start, and the variable frequency fan 44 performs air cooling on the cooling pipeline 4, and the heat emitted by the cooling pipeline 4 is injected into the heat preservation chamber 46 through the airflow;

[0031] When the temperature of the hydraulic oil rises again, the temperature sensor 42 transmits a high temperature signal to the vertical mill body 1, and the vertical mill body 1 controls the variable frequency fan 44 to increase the wind speed, and the air flow rate in the sleeve 43 increases. At the same time, the cover plate 5 is blown up, the heat dissipation holes are opened, and the hot air flow in the sleeve 43 is accelerated to be discharged, and the cooling effect of the cooling pipeline 4 is improved.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vertical mill hydraulic oil cooling device, comprising a vertical mill body (1), a hydraulic oil circulation pipeline (2) being arranged on the surface of the vertical mill body (1), and a hot air pipe (3) being installed on the lower end surface of the vertical mill body (1), characterized in that: A cooling mechanism is installed on the surface of the hydraulic oil circulation pipeline (2), and the cooling mechanism comprises a cooling pipeline (4).

2. A vertical mill hydraulic oil cooling device according to claim 1, characterized in that: The oil outlet surface of the hydraulic oil circulation pipeline (2) is fixedly connected to the upper end opening of the cooling pipeline (4); the cooling pipeline (4) is spiral-shaped; the lower end outlet surface of the cooling pipeline (4) is fixedly connected to an oil inlet pipe (41); the interior of the oil inlet pipe (41) is connected to the oil outlet of the hydraulic oil circulation pipeline (2) via the cooling pipeline (4); the end of the oil inlet pipe (41) is fixedly connected to and connected to the oil inlet of the hydraulic oil circulation pipeline (2).

3. A vertical mill hydraulic oil cooling device according to claim 2, characterized in that: A temperature sensor (42) is installed on the surface of the oil inlet pipe (41), and a sleeve (43) is fixedly sleeved on the surface of the oil inlet pipe (41) and the surface of the oil outlet of the hydraulic oil circulation pipeline (2). The sleeve (43) is in the shape of a pipe with both the upper and lower ends open, and the cooling pipeline (4) is located inside the sleeve (43).

4. A vertical mill hydraulic oil cooling device according to claim 3, characterized in that: A variable frequency fan (44) is installed on the inner wall of the upper end of the sleeve (43), and a heat preservation pipe (45) is sleeved on the outer surface of the hot air pipe (3).

5. A vertical mill hydraulic oil cooling device according to claim 4, characterized in that: An insulation cavity (46) is formed between the inner wall of the insulation pipe (45) and the outer surface of the hot air pipe (3); a connecting rod (47) is fixedly connected to the inner wall of the insulation pipe (45); the end of the connecting rod (47) is fixedly connected to the outer surface of the hot air pipe (3); and the upper surface of the insulation pipe (45) is fixedly connected and communicated with the lower surface of the sleeve (43).

6. A vertical mill hydraulic oil cooling device according to claim 3, characterized in that: The outer surface of the sleeve (43) is provided with a heat dissipation hole, the outer end opening surface of the heat dissipation hole is hingedly connected to a cover plate (5), and the outer surfaces of a plurality of cover plates (5) are fixedly connected to connecting rods (6).

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