CN211975870U - Grinding disc sealing device - Google Patents

Abstract

The utility model provides a mill sealing device, including mill and casing, form between casing and mill and scrape the material room, it is sealed through mechanical seal subassembly between casing bottom plate and mill outer wall, wherein mechanical seal subassembly is including sealed fitting with a contraceptive ring, sealed lower ring, and sealed fitting with a contraceptive ring cup joints outside the mill, and sealed lower ring is fixed on casing bottom plate, and sealed fitting with a contraceptive ring inner wall is equipped with the border of inside extension, through the screw fixation between sealed fitting with a contraceptive ring and the sealed lower ring, seals to fit with a contraceptive ring, forms mechanical seal room between the sealed lower ring cooperation mill outer wall. Through setting up the sealed unique seal structure who fits with a contraceptive ring and seal the lower ring not only overcome traditional mechanical seal not enough, still solved the difficulty of installation dismantlement effectively, further increased the gas seal subassembly and sealed, further guaranteed sealed effect, avoided environmental pollution, reduceed vertical mill system coefficient of leaking out and energy consumption, reduced to a certain extent and ground interior design air volume, the utility model discloses superior spreading value has.

Description

Grinding disc sealing device

Technical Field

The utility model belongs to the technical field of vertical mill, especially, relate to the sealed field between mill and the casing in the vertical mill.

Background

In recent decades, the vertical mill has excellent performance in various industries, and has the remarkable advantages of compact structure, high production efficiency, convenient maintenance and the like, so the vertical mill is widely popularized on an industrial production line. The millstone of the vertical mill is a bearing unit and a rotating unit, materials are ground between the millstone and the grinding rollers, fine particles rise into the powder selecting machine for grading screening under the action of wind power, and coarse particles fall into the bottom of the lower shell through the wind ring and are discharged out of the mill through the scraping frame. There is relative motion in mill and lower casing, and the granule is often excessive through this kind of clearance, leads to the polluted environment, still can increase vertical mill's the coefficient of leaking out, has increased the energy consumption, and traditional sealing device uses mechanical seal to give first place to, though can reduce the granule frequency of leaking outward to a certain extent, but the effect is still unsatisfactory, as long as there is the granule to get into the wearing and tearing that sealed department will aggravate the sealing washer, lead to sealed inefficacy, and traditional sealed is a whole, and the installation is big and dangerous with the dismantlement work load.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a sealed effectual mill sealing device is provided.

In order to realize the purpose, the utility model adopts the technical scheme that:

the utility model provides a mill sealing device, includes mill and casing, forms between casing and mill and scrapes the material room, seals through mechanical seal subassembly between casing bottom plate and mill outer wall, wherein mechanical seal subassembly including sealed fitting with a contraceptive ring, sealed lower ring, sealed fitting with a contraceptive ring cup joints outside the mill, sealed lower ring fix on the casing bottom plate, sealed fitting with a contraceptive ring inner wall is equipped with the border of inside extension, sealed fitting with a contraceptive ring and sealed lower ring between through the screw fixation, sealed fitting with a contraceptive ring, sealed lower ring cooperation mill outer wall between form mechanical seal room.

The upper sealing ring and the lower sealing ring are arranged above the shell bottom plate, and the lower sealing ring and the shell bottom plate are fixedly welded.

The sealing device is characterized in that the sealing device is sealed between a shell bottom plate and the outer wall of a grinding disc through a gas sealing assembly, the gas sealing assembly comprises a sealing outer ring and a sealing bottom ring, a ventilation pipe is connected to the sealing bottom ring, the sealing outer ring is fixed on the shell bottom plate, the sealing bottom ring is sleeved outside the grinding disc, a gap exists between the sealing bottom ring and the grinding disc, a sealing element is filled in the gap, and a sealing cover for preventing the sealing element from sliding out is fixed on the sealing bottom ring.

The sealing outer ring is welded below the bottom plate of the shell and fixedly connected with the sealing bottom ring.

The inner wall of the sealing bottom ring is provided with an inward convex blocking part.

The sealing cover is a plurality of, still include the connecting plate that links together a plurality of sealing covers, connecting plate and sealing cover fixed connection.

The sealing element is an asbestos packing.

The utility model has the advantages that: the utility model discloses a set up sealed unique seal structure who fits with a contraceptive ring and sealed lower ring and not only overcome traditional mechanical seal's not enough, still solved the difficulty of installation dismantlement effectively, further increased the gas seal subassembly and sealed, further guaranteed sealed effect, avoided environmental pollution, reduceed vertical mill system coefficient of leaking out and energy consumption, reduced to a certain extent and ground interior design air volume, the utility model discloses superior spreading value has.

Drawings

FIG. 1 is a half sectional view of the structure of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

reference numerals: in the figure 1, a scraping chamber; 2. a housing floor; 3. sealing the outer ring; 4. a gas-tight chamber; 5. a vent pipe; 6. a grinding disc; 7. a mechanical seal chamber; 8. sealing the upper ring; 9. sealing the lower ring; 10. sealing the bottom ring; 11. a connecting plate; 12. a sealing cover; 13. asbestos packing.

Detailed Description

The present invention will be further described with reference to the following examples.

The sealing device for the grinding disc and the shell as shown in fig. 1 and 2 comprises a scraping chamber 1, a shell bottom plate 2, a sealing outer ring 3, a gas sealing chamber 4, a ventilation pipe 5, a grinding disc 6, a mechanical sealing chamber 7, a sealing upper ring 8, a sealing lower ring 9, a sealing bottom ring 10, a connecting plate 11, a sealing cover 12 and an asbestos packing 13, wherein the grinding disc 6 is provided with the mechanical sealing chamber 7 and the gas sealing chamber 4 on the circumference respectively, and a sealing system is formed together. The upper sealing ring 8 and the lower sealing ring 9 are connected through bolts, the grinding disc 6, the upper sealing ring 8 and the lower sealing ring 9 form a mechanical sealing chamber 7, and the lower sealing ring 9 is welded on the bottom plate 2 of the shell.

Sealed outer loop 3 welding in 2 bottoms of casing bottom plate, sealed bottom ring 10 pass through bolted connection with sealed outer 3 rings, sealed bottom ring 10 bottom evenly arrange 6 ventilation pipe 5 of group, sealed bottom ring 10 respectively in sealed outer loop 3, casing bottom plate 2, mill 6 form gas seal room 4 jointly, sealed lid 12 and sealed bottom ring 10 pass through bolted connection, and divide equally on 6 circumferences of mill according to 6 groups, 11 two liang of sealed lids 12 of 6 groups of passing through bolted connection mode of connecting plate combine together, sealed lid 12 and sealed bottom ring 10 in be equipped with a set of asbestos packing 13.

The principle is summarized as follows: the utility model discloses a to the sealed problem design of mill operation process, the utility model discloses the sealing system who comprises mechanical seal room 7 and gas seal room 4, in dust or thinner granule enters into mechanical seal room 7 through scraping material room 1, can fall into in the gas seal room 4, because asbestos packing 13's sealed separation effect, make the granule can't continue to escape outside the mill, pass through ventilation pipe 5 when wind and get into gas seal room 4, the double-phase gas-solid flow field of fine granule and the gentle constitution of gas seal room 4, blow in scraping material room 1 through mechanical seal room 7, finally get into in the vertical mill, the wind that lets in 1000KPa in succession will block the entering mechanical seal room 7 of granule in, solve sealed problem effectively.

The method has the advantages of simple structure, low investment, high recovery rate, small pollution, flexibility and convenience, can overcome the defects of the traditional structure and the method, exerts great advantages, realizes good operation of the design concept in the process of processing the millstone seal, and creates economic value.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that simple modifications and substitutions by those skilled in the art are within the scope of the present invention without departing from the spirit and scope of the present invention.

Claims (7)

1. The utility model provides a mill sealing device, includes mill and casing, forms between casing and mill and scrapes the material room, its characterized in that: seal through mechanical seal subassembly between casing bottom plate and mill outer wall, wherein mechanical seal subassembly is including sealed fitting with a contraceptive ring, sealed lower ring, sealed fitting with a contraceptive ring cup joints in the mill outside, sealed lower ring fix on the casing bottom plate, sealed fitting with a contraceptive ring inner wall is equipped with the border of inside extension, through the screw fixation between sealed fitting with a contraceptive ring and the sealed lower ring, sealed fitting with a contraceptive ring, sealed lower ring cooperation mill outer wall between form the mechanical seal room.

2. A disc seal as defined in claim 1 wherein: the upper sealing ring and the lower sealing ring are arranged above the shell bottom plate, and the lower sealing ring and the shell bottom plate are fixedly welded.

3. A disc seal according to claim 1 or 2, wherein: the sealing device is characterized in that the sealing device is sealed between a shell bottom plate and the outer wall of a grinding disc through a gas sealing assembly, the gas sealing assembly comprises a sealing outer ring and a sealing bottom ring, a ventilation pipe is connected to the sealing bottom ring, the sealing outer ring is fixed on the shell bottom plate, the sealing bottom ring is sleeved outside the grinding disc, a gap exists between the sealing bottom ring and the grinding disc, a sealing element is filled in the gap, and a sealing cover for preventing the sealing element from sliding out is fixed on the sealing bottom ring.

4. A disc seal as defined in claim 3 wherein: the sealing outer ring is welded below the bottom plate of the shell and fixedly connected with the sealing bottom ring.

5. A disc seal as defined in claim 3 wherein: the inner wall of the sealing bottom ring is provided with an inward convex blocking part.

6. A disc seal as defined in claim 3 wherein: the sealing cover is a plurality of, still include the connecting plate that links together a plurality of sealing covers, connecting plate and sealing cover fixed connection.

7. A disc seal as defined in claim 3 wherein: the sealing element is an asbestos packing.

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