CN219327787U

CN219327787U - Labyrinth seal structure of cement mill

Info

Publication number: CN219327787U
Application number: CN202320201908.3U
Authority: CN
Inventors: 黄成恩; 杨正威; 赵家俊; 赵献民; 翁国平; 黄忠文; 罗胜云
Original assignee: Nanning Hongshi Cement Co ltd
Current assignee: Nanning Hongshi Cement Co ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-07-11
Anticipated expiration: 2033-02-14

Abstract

The utility model relates to the technical field of cement mills, in particular to a labyrinth seal structure of a cement mill. Its technical scheme includes feeder hopper, annular cover and cement bistrique, the welding of feeder hopper surface has the annular cover, annular cover internal surface welding has the annular to keep off the cover, and the annular keeps off the cover and connect in cement bistrique surface, annular keeps off cover external surface connection has the trachea, the annular keeps off one side that the cover is located the annular cover and installs the second fin, the annular keeps off one side that the cover inner wall deviates from the second fin and installs first fin, cement bistrique surface welding has the friction ring, the friction ring surface is equipped with the ladder face, annular cover lower surface welding has the storage hopper. The utility model can improve the tightness between the grinding head of the cement grinding mill and the feeding device, prevent materials from leaking, and simultaneously avoid causing environmental pollution.

Description

Labyrinth seal structure of cement mill

Technical Field

The utility model relates to the technical field of cement mills, in particular to a labyrinth seal structure of a cement mill.

Background

The cement mill is very important equipment in cement production, in cement production cost, the electricity consumption of grinding accounts for 35% -40% of cement cost, cement grinding is the last key of controlling cement quality, and to a certain extent, the grinding quality can make up for the defect of clinker quality (namely grinding can improve cement quality), so that the qualification rate of factory cement is ensured.

A certain gap is usually reserved between a rotary grinding head and a static feeding hopper device of a cement mill for producing the existing cement, and the ground materials in the mill are easy to leak out from the gap, so that the materials are wasted, and meanwhile, the environment is polluted.

Disclosure of Invention

The utility model aims to provide a labyrinth sealing structure of a cement mill, which has the advantages of improving the tightness between a grinding head of the cement mill and a feeding device, preventing materials from leaking and avoiding causing environmental pollution, and solves the problems that a certain gap is usually reserved between a rotary grinding head and a static feeding hopper device of the conventional cement mill for cement production, and the ground materials in the mill are easy to leak out from the gap, so that the materials are wasted and the environment is polluted.

In order to achieve the above purpose, the present utility model provides the following technical solutions: including feeder hopper, annular cover and cement bistrique, feeder hopper surface welding has the annular cover, annular cover internal surface welding has the annular to keep off the cover, and the annular keeps off the cover and connect in cement bistrique surface, annular keeps off cover external surface connection has the trachea, the annular keeps off one side that the cover is located the annular cover and installs the second fish scale, annular keeps off one side that the cover inner wall deviates from the second fish scale and installs first fish scale, cement bistrique surface welding has the friction ring, the friction ring surface is equipped with the step face, annular cover lower surface welding has the storage hopper.

Preferably, the step surface is provided with two steps, the two step surfaces are respectively arranged at two sides of the outer surface of the friction ring, and the first fish scale and the second fish scale are respectively contacted with the two step surfaces, so that the first fish scale and the second fish scale bend towards the direction of the annular cover, and then gas in the annular shielding cover can enter the annular cover through a gap between the second fish scale and the friction ring, and cannot be discharged from the gap between the first fish scale and the friction ring.

Preferably, a filter valve is connected to the position, close to the upper surface, of the outer surface of the storage hopper, a pressure release valve is connected to the tail end of the filter valve, and the pressure inside the annular cover and the storage hopper is relieved through the pressure release valve.

Preferably, the lower surface of the storage hopper is connected with a discharge valve, and materials collected in the storage hopper can be discharged after the discharge valve is opened.

Preferably, the rear surface of the storage hopper is provided with an observation port, a transparent plate is arranged in the observation port, and the material collection amount in the storage hopper can be observed through the transparent plate, so that a discharge valve can be conveniently opened in time to discharge the material.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the sealing performance between the grinding head of the cement grinding mill and the feeding device can be improved, the leakage of materials is prevented, and meanwhile, the environmental pollution is avoided by arranging the annular cover, the annular shielding cover, the first fish scale, the second fish scale, the friction ring, the air pipe and the storage hopper.

Drawings

FIG. 1 is a schematic diagram of a front view structure of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

fig. 3 is an enlarged schematic view of the structure B of fig. 1 according to the present utility model.

Reference numerals: 1. a feed hopper; 2. an annular cover; 3. an air pipe; 4. cement grinding head; 5. a storage hopper; 6. an observation port; 7. a transparent plate; 8. a discharge valve; 9. an annular shield; 10. a first fish scale; 11. a step surface; 12. a friction ring; 13. a second fish scale; 14. a pressure release valve; 15. and a filter valve.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

As shown in fig. 1 to 3, the labyrinth seal structure of the cement grinding mill provided by the utility model comprises a feed hopper 1, an annular cover 2 and a cement grinding head 4, wherein part of the feed hopper 1 is positioned inside the cement grinding head 4, a certain gap exists between the inner wall of the cement grinding head 4 and the outer surface of the feed hopper 1, the annular cover 2 is welded on the outer surface of the feed hopper 1, the annular cover 9 is welded on the inner surface of the annular cover 2, the annular cover 9 is sleeved on the outer surface of the cement grinding head 4, the outer surface of the annular cover 9 is connected with an air pipe 3, a second fish scale 13 is arranged on one side of the annular cover 9, a first fish scale 10 is arranged on one side of the inner wall of the annular cover 9, which is away from the second fish scale 13, a friction ring 12 is welded on the outer surface of the cement grinding head 4, two stepped surfaces 11 are arranged on the outer surface of the friction ring 12, the two stepped surfaces 11 are respectively arranged on two side positions of the outer surface of the friction ring 12, the first fish scale 10 and the second fish scale 13 are respectively contacted with the two stepped surfaces 11, so that the first fish scale 10 and the second fish scale 13 are bent towards the annular cover 2, then the gas in the annular baffle cover 9 can enter the annular cover 2 through the gap between the second fish scale 13 and the friction ring 12 and can not be discharged from the gap between the first fish scale 10 and the friction ring 12, the storage hopper 5 is welded on the lower surface of the annular cover 2, the filter valve 15 is connected at the position, close to the upper surface, of the outer surface of the storage hopper 5, of the filter valve 15, the pressure relief valve 14 is connected at the tail end of the filter valve 15, the pressure in the annular cover 2 is relieved through the pressure relief valve 14, the discharge valve 8 is connected on the lower surface of the storage hopper 5, the rear surface of the storage hopper 5 is provided with the observation port 6, the transparent plate 7 is arranged in the observation port 6, the material collection amount in the storage hopper 5 can be observed through the transparent plate 7, thereby facilitating the timely opening of the discharge valve 8 to discharge it.

In the using process of the utility model, cement materials enter the rotary cement grinding head 4 from the static feed hopper 1, the air pipe 3 conveys air into the annular baffle cover 9, so that the annular baffle cover 9 is in a micro-positive pressure state, materials leaked from a gap between the feed hopper 1 and the cement grinding head 4 enter the annular cover 2, and the annular cover 2 and the annular baffle cover 9 form a labyrinth sealing structure because the annular baffle cover 9 is in the micro-positive pressure state, the materials in the annular cover 2 cannot enter the annular baffle cover 9, and the leaked materials are collected in the storage hopper 5.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims

1. The utility model provides a cement mill labyrinth seal structure, includes feeder hopper (1), annular cover (2) and cement bistrique (4), its characterized in that: the utility model discloses a cement grinding head, including feeder hopper (1), annular cover (2) internal surface welding has annular fender cover (9), and annular fender cover (9) cup joint in cement grinding head (4) surface, annular fender cover (9) external surface connection has trachea (3), annular fender cover (9) are located one side of annular cover (2) and install second fish scale (13), annular fender cover (9) inner wall deviates from one side of second fish scale (13) and installs first fish scale (10), cement grinding head (4) external surface welding has friction ring (12), friction ring (12) surface is equipped with step face (11), annular cover (2) lower surface welding has storage hopper (5).

2. A cement mill labyrinth seal as claimed in claim 1, wherein: the two stepped surfaces (11) are arranged in total, and the two stepped surfaces (11) are respectively arranged at two sides of the outer surface of the friction ring (12).

3. A cement mill labyrinth seal as claimed in claim 1, wherein: the position, close to the upper surface, of the outer surface of the storage hopper (5) is connected with a filter valve (15), and the tail end of the filter valve (15) is connected with a pressure release valve (14).

4. A cement mill labyrinth seal as claimed in claim 1, wherein: the lower surface of the storage hopper (5) is connected with a discharge valve (8).

5. A cement mill labyrinth seal as claimed in claim 1, wherein: the rear surface of the storage hopper (5) is provided with an observation port (6), and a transparent plate (7) is arranged in the observation port (6).