Fine dustproof driving structure of grading wheel of vertical flour mill

Abstract

The utility model relates to a fine dustproof driving structure of a grading wheel of a vertical flour mill, which comprises a grading machine cylinder, transition plates are arranged on the outer wall of the upper part of the grading machine cylinder along the circumferential direction at intervals, and driving motors are arranged on the transition plates. A rotating shaft of the driving motor penetrates through a shaft hole in the transition plate to be connected with a grading wheel in the grading machine barrel, an annular airtight cavity is formed in the shaft hole, and the annular airtight cavity is connected with an air source of compressed air. The driving mechanism not only is simple in structure, but also helps to improve the dustproof effect of the rotating shaft.

Description

Technical Field

[0001] The utility model relates to a fine dust-proof driving structure of a grading wheel of a vertical grinding mill. Background Art

[0002] Vertical grinding mill is one of the important inorganic powder filler grinding equipment, which can be used for processing powders such as limestone, calcite, dolomite, talc, barite, wollastonite, brucite, calcium hydroxide, gypsum, coke, slag, phosphate, etc.

[0003] The classifier in a traditional vertical grinding mill generally adopts a belt drive method, that is, the motor drives the rotating shaft of the classifying wheel to rotate through a pulley mechanism, and the rotating shaft of the classifying wheel requires an additional bearing seat to be added to the outer wall of the classifier for supporting the rotating shaft. For example, patent CN201810102173.2 discloses a classifying device in a vertical mill with automatic iron removal. This type of classifying wheel drive method is not only complex in structure and high in cost, but also troublesome to add lubricating oil to the bearing seat. At the same time, if the bearings and other parts in the bearing seat are damaged, maintenance is inconvenient. In addition, the dustproof effect of the rotating shaft of the classifying wheel is not good. Utility Model Content

[0004] The purpose of the utility model is to provide a fine dust-proof driving structure for a grading wheel of a vertical grinding mill. The driving mechanism is not only simple in structure but also helps to improve the dust-proof effect of the rotating shaft.

[0005] The technical solution of the utility model is: a fine dust-proof driving structure of a classifying wheel of a vertical grinding mill, comprising a classifying barrel, wherein the upper outer wall of the classifying barrel is provided with transition plates spaced apart in the circumferential direction, and a driving motor is installed on each transition plate, and the rotating shaft of the driving motor passes through an axial hole on the transition plate and is connected to the classifying wheel in the classifying barrel, an annular airtight chamber is provided in the axial hole, and the annular airtight chamber is connected to a compressed air source.

[0006] Furthermore, an air inlet channel connected to the annular airtight cavity is provided on the transition plate, an air source pipe is installed on the lower outer wall of the classifier channel, and the air inlet channel is connected to the air source pipe via a pipeline.

[0007] Furthermore, the air source pipe is annular and is arranged on the outer wall of the classifier barrel through a connecting frame, and the air source pipe is provided with an air inlet end connected to the air source.

[0008] Furthermore, an annular gasket is sleeved on the rotating shaft of the driving motor between the transition plate and the grading wheel, and the rotating shaft passes through the mounting hole of the grading wheel and is locked and fixed via a blind cover.

[0009] Furthermore, the upper chamber of the classifier barrel is provided with a fine powder output cylinder with a closed bottom, the upper end of the fine powder output cylinder passes through the classifier barrel, the lower side wall of the fine powder output cylinder is provided with powder inlet pipes at intervals along the circumferential direction, and the outer ends of the air inlet channels are provided with classifying wheels.

[0010] Furthermore, an air inlet pipe is provided on the top of the classifier barrel.

[0011] Furthermore, the driving motor is a variable frequency motor, and the fixing seat of the motor is bolted to the transition plate.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. This drive mechanism effectively simplifies the structure of the classifying wheel drive mechanism by directly connecting the rotating shaft of the drive motor to the classifying wheel.

[0014] 2. By setting an annular airtight cavity on the transition plate, compressed air helps to form an airtight seal between the rotating shaft and the shaft hole, which not only solves the problem of rotating shaft lubrication, but also helps to prevent dust from entering the shaft hole, effectively improving the dust-proof effect of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 This is a schematic diagram of the cooperation between the drive motor, transition plate and grading wheel of the utility model;

[0018] In the figure: 10-classifier barrel 11-fine powder output cylinder 12-powder inlet pipe 13-air inlet pipe 20-transition plate 21-annular airtight chamber 22-air inlet channel 30-drive motor 31-rotating shaft 32-annular pad 33-flat key 34-blind cover 40-classifying wheel 50-air source pipe 51-connecting frame 52-air inlet end. DETAILED DESCRIPTION

[0019] To make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0020] refer to Figures 1 to 3

[0021] A fine dust-proof drive structure for a classifying wheel of a vertical grinding mill comprises a classifying barrel 10, wherein transition plates 20 are installed at intervals along the circumferential direction on the upper outer wall of the classifying barrel, and a drive motor 30 is installed on each transition plate. A rotating shaft 31 of the drive motor passes through an axial hole on the transition plate and is connected to a classifying wheel 40 in the classifying barrel. An annular airtight chamber 21 in communication with the axial hole is provided in the axial hole, and the annular airtight chamber is connected to an air source of compressed air, so that an airtight seal is achieved by introducing compressed air into the annular airtight chamber, thereby effectively preventing dust in the classifying barrel from entering the axial hole and improving the dust-proof effect.

[0022] In this embodiment, an air inlet channel 22 connected to the annular airtight cavity is provided on the transition plate, and an air source pipe 50 is installed on the lower outer wall of the classifier channel. The air inlet channel is connected to the air source pipe through a pipeline, thereby supplying compressed gas to each annular airtight cavity.

[0023] In this embodiment, the air source pipe is annular and is arranged on the outer wall of the classifier barrel through a connecting frame 51. The air source pipe is provided with an air inlet end 52 connected to an air source, for example, an air compressor.

[0024] In this embodiment, to control the distance between the classifying wheel and the transition plate, an annular spacer 32 is placed on the shaft of the drive motor between the transition plate and the classifying wheel. To connect the shaft to the classifying wheel, the shaft is inserted into the mounting hole of the classifying wheel and is provided with a flat key 33. The end of the shaft is locked and fixed to the classifying wheel via a blind cover 34.

[0025] In this embodiment, the upper chamber of the classifier barrel is equipped with a closed-bottom fine powder discharge cylinder 11. The upper end of the fine powder discharge cylinder extends through the classifier barrel. Powder inlet pipes 12 are circumferentially spaced along the lower sidewall of the fine powder discharge cylinder. Classifying wheels are installed at the outer ends of the air inlet channels. After the particles to be classified in the classifier barrel are classified by the classifying wheels, the fine powder is discharged from the fine powder discharge cylinder through the powder inlet pipe.

[0026] In this embodiment, air inlet pipes 13 are arranged at intervals along the circumferential direction on the top of the classifier barrel.

[0027] In this embodiment, the drive motor is a variable frequency motor, and the drive motor is a customized product with an extended shaft. The motor's fixed base and transition plate are connected to the classifier barrel via bolts.

[0028] If the present invention 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 (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously not possible to use an integrated molding process).

[0029] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the above-mentioned utility model to express positional relationships or shapes include states or shapes that are approximate, similar or close thereto.

[0030] Any component provided by the present invention can be assembled from multiple separate components, or can be a separate component manufactured by an integral forming process.

[0031] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A fine dust-proof driving structure for a vertical grinding mill classifying wheel, comprising a classifying cylinder, characterized in that: Transition plates are installed at intervals along the circumferential direction on the upper outer wall of the classifier barrel, and a drive motor is installed on each transition plate. The rotating shaft of the drive motor passes through the axial hole on the transition plate and is connected to the classifying wheel in the classifier barrel. An annular airtight cavity is provided in the axial hole, and the annular airtight cavity is connected to the air source of compressed air.

2. The fine dust-proof driving structure of the vertical grinding mill classifying wheel according to claim 1, characterized in that: An air inlet passage connected to the annular airtight cavity is provided on the transition plate, an air source pipe is installed on the lower outer wall of the classifier passage, and the air inlet passage is connected to the air source pipe via a pipeline.

3. The fine dust-proof driving structure of the vertical grinding mill classifying wheel according to claim 2, characterized in that, The air source pipe is annular and is arranged on the outer wall of the classifier barrel through a connecting frame. The air source pipe is provided with an air inlet end connected to the air source.

4. The fine dust-proof driving structure of the vertical grinding mill classifying wheel according to claim 1, 2 or 3, characterized in that: An annular pad is sleeved on the rotating shaft of the driving motor between the transition plate and the grading wheel. The rotating shaft passes through the mounting hole of the grading wheel and is locked and fixed via a blind cover.

5. The fine dust-proof driving structure of the classifying wheel of the vertical grinding mill according to claim 1 is characterized in that: The upper chamber of the classifier barrel is provided with a fine powder output cylinder with a closed bottom, the upper end of the fine powder output cylinder passes through the classifier barrel, the lower side wall of the fine powder output cylinder is provided with powder inlet pipes at intervals along the circumferential direction, and the outer ends of the air inlet channels are provided with classifying wheels.

6. The fine dust-proof driving structure of the classifying wheel of the vertical grinding mill according to claim 1 or 5, characterized in that: An air inlet pipe is provided on the top of the classifier barrel.

7. The fine dust-proof driving structure of the classifying wheel of the vertical grinding mill according to claim 1, characterized in that: The driving motor is a variable frequency motor, and the fixing seat of the motor is connected with the transition plate by bolts.

Images