Hydraulic oil station for pressing down grinding wheel of vertical flour mill

Abstract

The hydraulic oil station comprises an oil tank, the side wall of the lower portion of the oil tank is connected with a high-pressure oil pump through a first filter, the output end of the high-pressure oil pump is connected with a second filter through a pipeline, and the second filter is connected with a reversing valve through an overflow valve. One port of the reversing valve is connected with a synchronous flow distributing and collecting valve through a pipeline, three output ports of the synchronous flow distributing and collecting valve are all connected with a first pipeline connected with a driving oil cylinder of the grinding roller assembly, and the driving oil cylinder is connected with a second port of the reversing valve through a second pipeline and a one-way valve. The hydraulic oil station is favorable for ensuring that the operation actions of all the grinding roller assemblies are synchronous.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil station for pressing down grinding wheels of a vertical mill. Background Art

[0002] The vertical mill is one of the important grinding and processing equipments for inorganic powder fillers, and can be applied to the processing of powders such as limestone, calcite, dolomite, talc, barite, wollastonite, brucite, calcium hydroxide, gypsum, coking coal, slag, phosphate, etc.

[0003] When the vertical mill grinds materials, the materials move towards the edge of the grinding disc. When passing through the grinding track, they are nipped between the grinding wheel and the grinding disc for grinding and crushing. The ground materials continue to move towards the edge of the grinding disc until they are ground into powder and overflow outside the disc. In order to ensure that the materials are fully ground into powder, usually a downward pressure needs to be applied to the roller assembly through a hydraulic cylinder, so that the grinding wheels on the roller assembly can apply pressure better. Since the vertical mill is large in volume and the pipeline lengths from the oil tank to the driving cylinders of each roller assembly are different, it is impossible to synchronize the actions of controlling the downward pressure of the grinding wheels. Therefore, a special hydraulic oil station for pressing down the grinding wheels of a vertical mill is needed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic oil station for pressing down grinding wheels of a vertical mill, which helps to ensure the synchronization of the operation actions of each roller assembly.

[0005] The technical solution of the utility model lies in: a hydraulic oil station for pressing down grinding wheels of a vertical mill, including an oil tank, the lower side wall of the oil tank is connected to a high-pressure oil pump through a first filter, the output end of the high-pressure oil pump is connected to a second filter through a pipeline, the second filter is connected to a reversing valve through an overflow valve, one port of the reversing valve is connected to a synchronous shunt and manifold valve through a pipeline, three output ports on the synchronous shunt and manifold valve are all connected to a first pipeline connected to the driving cylinder of the roller assembly, and the driving cylinder is connected to the second port of the reversing valve through a second pipeline and a check valve.

[0006] Furthermore, it also includes a base, and both the oil tank and the high-pressure oil pump are installed on the base.

[0007] Furthermore, a motor for driving the high-pressure oil pump is arranged on the base.

[0008] Furthermore, a return pipeline connected to the top of the oil tank is connected to the third port of the reversing valve, and a cooler is arranged on the return pipeline.

[0009] Furthermore, the second filter, the overflow valve, the reversing valve, the synchronous shunt and manifold valve, the check valve, and the cooler are all installed on the top of the oil tank.

[0010] Furthermore, accumulators are provided at one end of the first pipeline close to the driving oil cylinder, and a control box is also provided on the side wall of the fuel tank.

[0011] Furthermore, the first filter is a coarse filter, and the second filter is a fine filter.

[0012] Furthermore, a pressure gauge is provided on the reversing valve, and a pressure gauge is provided on the check valve.

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] 1. The hydraulic oil station has a compact structure. By providing synchronous flow dividing and collecting valves on each supply pipeline, it helps to ensure the synchronous operation of each roller assembly.

[0015] 2. By providing a coarse filter and a fine filter, impurities in the hydraulic oil can be better filtered, and a cooling fan is adopted to better cool the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model Figure 1 ;

[0017] Figure 2 is a connection pipeline diagram of the hydraulic oil station of the present utility model and the driving oil cylinder;

[0018] Figure 3 is a schematic diagram of the cooperation between the driving cylinder and the roller assembly of the present utility model;

[0019] In the figure: 1 - fuel tank, 2 - first filter, 3 - high-pressure oil pump, 4 - second filter, 5 - overflow valve, 6 - reversing valve, 7 - synchronous flow dividing and collecting valve, 8 - check valve, 9 - motor, 10 - return pipeline, 11 - cooler, 12 - bracket, 13 - control box, 14 - pressure gauge, 15 - pressure gauge, 16 - first pipeline, 17 - second pipeline, 18 - accumulator, 19 - heater, 20 - driving oil cylinder, 30 - base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the above features and advantages of the present utility model more understandable, specific embodiments are given below in conjunction with the accompanying drawings and described in detail as follows, but the present utility model is not limited thereto.

[0021] Reference Figures 1 to 3

[0022] A hydraulic oil station for pressing down the grinding wheel of a vertical mill, comprising an oil tank 1. The lower side wall of the oil tank is connected to a high-pressure oil pump 3 through a first filter 2. The output end of the high-pressure oil pump is connected to a second filter 4 through a pipeline. The second filter is connected to a reversing valve 6 through a relief valve 5. One port of the reversing valve is connected to a synchronous flow dividing and collecting valve 7 through a pipeline. All three output ports on the synchronous flow dividing and collecting valve are connected to a first pipeline 16 that is connected to the upper chamber of the driving oil cylinder 20 of the grinding roller assembly 40. The lower chamber of the driving oil cylinder is connected to a second pipeline 17 and is connected to a check valve 8 through the same pipe. The other end of the check valve is connected to the second port of the reversing valve. Thus, the synchronous flow dividing and collecting valve makes the output oil liquid synchronous, and further synchronously controls the driving contraction, and the grinding roller assembly realizes synchronous pressing down.

[0023] In this embodiment, it further includes a base, and the oil tank and the high-pressure oil pump are both installed on the base 30 so as to be fixed on the ground through the base.

[0024] In this embodiment, a motor 9 for driving the high-pressure oil pump is arranged on the base, and the high-pressure oil pump is driven to rotate by the motor.

[0025] In this embodiment, a return pipeline 10 connected to the top of the oil tank is connected to the third port of the reversing valve, and a cooler 11 is arranged on the return pipeline. Thus, the redundant hydraulic oil returned from the second pipeline is cooled by the cooler and then sent back into the oil tank.

[0026] In this embodiment, the second filter, the relief valve, the reversing valve, the synchronous flow dividing and collecting valve, the check valve, and the cooler are all installed on the top of the oil tank. In order to better install the cooler, the cooler is installed on the top side wall of the oil tank through a bracket 12, and a cooling fan is arranged on the cooler.

[0027] In this embodiment, accumulators 18 are arranged at one ends of the first pipelines close to the driving oil cylinders to store energy.

[0028] In this embodiment, the first filter is a coarse filter for coarsely filtering the oil liquid; the second filter is a fine filter for finely filtering the oil liquid.

[0029] In this embodiment, pressure gauges 14 are arranged on both the reversing valve and the check valve, and a pressure gauge 15 is also arranged on the check valve.

[0030] In this embodiment, a heater 19 is further arranged in the oil tank to heat the oil liquid when the oil temperature is too low.

[0031] In this embodiment, a control box 13 is also arranged on the side wall of the oil tank, and the hydraulic oil station is controlled through the control box.

[0032] In this embodiment, the roller assembly 40 is movably connected to the frame of the vertical mill. The end of the roller assembly is fixed to the upper end of the driving plate 50. The upper-middle part of the driving plate is hinged to the frame of the vertical mill. The lower end of the driving plate is hinged to the telescopic rod of the driving cylinder, and the housing of the driving cylinder is connected to the frame.

[0033] When the first pipeline 16 injects hydraulic oil into the upper cavity of the driving oil cylinder 20, the telescopic rod of the driving oil cylinder 20 contracts synchronously, thereby realizing the synchronous downward pressure of the roller assembly; when the second pipeline 17 injects hydraulic oil into the lower cavity of the driving oil cylinder 20, the telescopic rod of the driving oil cylinder 20 extends, and the grinding wheel of the roller assembly realizes the lifting action.

[0034] If the present utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (such as using bolts or screws), or it can also be understood as: a non-detachable fixed connection (such as riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (such as manufactured by integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0035] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present utility model, unless otherwise stated, include states or shapes that are approximate, similar, or close to it.

[0036] Any component provided by the present utility model can either be assembled from a plurality of separate components or be a single component manufactured by an integral forming process.

[0037] The above are only the preferred embodiments of the present utility model. All equivalent changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.

Claims

1. A hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill, comprising an oil tank, characterized in that: The lower side wall of the oil tank is connected to the high-pressure oil pump via a first filter, the output end of the high-pressure oil pump is connected to the second filter via a pipeline, the second filter is connected to the reversing valve via an overflow valve, one port of the reversing valve is connected to a synchronous diverter and collector valve via a pipeline, the three output ports on the synchronous diverter and collector valve are all connected to a first pipeline connected to the driving cylinder of the grinding roller assembly, and the driving cylinder is connected to the second port of the reversing valve via a second pipeline and a one-way valve.

2. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 1, characterized in that: It also includes a base, on which the oil tank and the high-pressure oil pump are installed.

3. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 2, characterized in that: A motor for driving a high-pressure oil pump is arranged on the base.

4. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 1, 2 or 3, characterized in that: The third port of the reversing valve is connected with a return pipeline connected to the top of the oil tank, and a cooler is arranged on the return pipeline.

5. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 4, characterized in that: The second filter, the overflow valve, the reversing valve, the synchronous flow dividing and collecting valve, the one-way valve and the cooler are all installed on the top of the oil tank.

6. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 1, characterized in that: An accumulator is provided on one end of the first pipeline close to the driving cylinder, and a control box is also provided on the side wall of the oil tank.

7. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 1, characterized in that: The first filter is a coarse filter, and the second filter is a fine filter.

8. The hydraulic oil station for pressing down the grinding wheel of a vertical grinding mill according to claim 1, characterized in that: The reversing valve is provided with a pressure gauge, and the one-way valve is provided with a pressure gauge.

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