CN113231154A

CN113231154A - Novel mill feed seal structure

Info

Publication number: CN113231154A
Application number: CN202110734374.6A
Authority: CN
Inventors: 钱翀; 李玉强; 李建华; 包世民; 张忠旭; 李文全
Original assignee: NFC Shenyang Metallurgy Machinery Co Ltd
Current assignee: NFC Shenyang Metallurgy Machinery Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-08-10

Abstract

The utility model provides a novel mill feed seal structure belongs to mechanical engineering technical field, concretely relates to overflow type wet mill feed seal structure's improvement. The invention provides a feeding sealing structure of a mill, which is simple in structure and good in sealing effect. The invention comprises a feeding lining and a front pipe of a feeding part, and is characterized in that: a flange is arranged at a feeding port of the feeding lining, an inner cylinder is arranged in the flange, and a spiral structure is arranged on the inner surface of the inner cylinder; the feeding portion front pipe is arranged in the inner cylinder body, and a gap is formed between the feeding portion front pipe and the spiral structure.

Description

Novel mill feed seal structure

Technical Field

The invention belongs to the technical field of mechanical engineering, and particularly relates to an improvement of a feeding sealing structure of an overflow wet mill.

Background

The prior structure of the sealing device for the feeding material of the overflow type wet mill adopts a three-tongue seal (figure 5) or a conical seal (figure 6). However, the three-tongue sealing ring 8 and the conical sealing gasket 9 in the existing structure have shorter service life, and the rubber part is aged and abraded after long-term use, and if the rubber part is not replaced in time, material leakage is caused, so that resource waste is caused, and the field environment is influenced.

Disclosure of Invention

Aiming at the problems, the invention provides a feeding sealing structure of a mill, which has a simple structure and a good sealing effect.

In order to achieve the above purpose, the invention adopts the following technical scheme, the invention comprises a feeding lining and a feeding part front pipe, and is characterized in that: a flange is arranged at a feeding port of the feeding lining, an inner cylinder is arranged in the flange, and a spiral structure is arranged on the inner surface of the inner cylinder; the feeding portion front pipe is arranged in the inner cylinder body, and a gap is formed between the feeding portion front pipe and the spiral structure.

As a preferable scheme of the invention, an air injection pipe is arranged outside the front pipe of the feeding part, and an air outlet of the air injection pipe corresponds to a gap between the front pipe of the feeding part and the spiral structure.

Furthermore, one end of the air injection pipe is connected with an instrument air source, the other end of the air injection pipe is closed, and the air injection pipe is welded and fixed on the front pipe of the feeding part in an annular shape.

Furthermore, the surface of one side of the gas injection pipe corresponding to the gap between the front pipe of the feeding part and the spiral structure is uniformly provided with gas outlets with the diameter of 3 mm.

As another preferable scheme of the present invention, the thread structure of the inner cylinder is a T-shaped thread.

Further, the thread structure of the inner cylinder body is a T-shaped thread with a tolerance on the diameter.

The invention has the beneficial effects that: 1. the invention has reasonable structure and good sealing effect, and greatly reduces the leakage risk.

2. The instrument wind sprayed out of the air outlet of the air spraying pipe is matched with the thread structure to form combined sealing, so that the possibility of slurry leakage at the position is greatly reduced.

3. The sealing structure of the invention has small running abrasion and long service life; meanwhile, the structure is simple, and the production, the processing and the maintenance are convenient.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the construction of the sealing system of the present invention.

Fig. 3 is an expanded view of the gas lance.

Fig. 4 is a schematic structural view of the inner cylinder.

Fig. 5 is a schematic view of a prior art triple tongue seal.

Fig. 6 is a schematic diagram of a prior art conical seal.

In the attached drawing, 1 is a flange, 2 is a feeding lining, 3 is an inner cylinder, 4 is an air injection pipe, 5 is a front pipe of a feeding part, 6 is a spiral structure, 7 is an air outlet, 8 is a three-tongue sealing ring in the prior art, and 9 is a conical sealing gasket in the prior art.

Detailed Description

The invention comprises a feeding lining 2 and a front tube 5 of a feeding part, and is characterized in that: a flange 1 is arranged at a feeding port of the feeding bush 2, an inner cylinder 3 is arranged in the flange 1, and a spiral structure 6 is arranged on the inner surface of the inner cylinder 3; the feeding part front pipe 5 is arranged in the inner cylinder 3, and a gap is arranged between the feeding part front pipe 5 and the spiral structure 6.

In a preferred embodiment of the present invention, an air injection pipe 4 is disposed outside the feeding section front pipe 5, and an air outlet 7 of the air injection pipe 4 corresponds to a gap between the feeding section front pipe 5 and the spiral structure 6.

Furthermore, one end of the gas injection pipe 4 is connected with an instrument gas source, the other end of the gas injection pipe 4 is sealed, and the gas injection pipe 4 is welded and fixed on the front pipe 5 of the feeding part in an annular shape.

Furthermore, the surface of one side of the gas injection pipe 4 corresponding to the gap between the front pipe 5 of the feeding part and the spiral structure 6 is uniformly provided with gas outlets 7 with the diameter of 3 mm.

As another preferable aspect of the present invention, the thread structure of the inner cylinder 3 is a T-shaped thread.

Further, the thread structure of the inner cylinder 3 is a T-shaped thread with a tolerance on the diameter.

When the mill is in operation, in case the ground paste in the mill barrel leaks, will flow into the gap department between the helical structure 6 of feed portion head tube 5 and interior barrel 3, when the mill barrel is rotatory, interior barrel 3 also can make rotary motion along with the mill barrel, the rotatory clearance department that will form the negative pressure between feed portion head tube 5 and helical structure 6 of diameter tape tolerance's T type screw thread, the suction that this kind of negative pressure produced can take most ground paste back to in the barrel, great reduction leak the thick liquid.

In addition, instrument air ejected from an air outlet 7 of the air ejector pipe 4 blows air at a gap between the front pipe 5 of the feeding part and the spiral structure 6, generated negative pressure is increased, the negative pressure is matched with the thread structure of the inner cylinder 3 to form combined sealing, and the possibility of slurry leakage at the position is greatly reduced.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.

Claims

1. The utility model provides a novel mill feed seal structure, including feeding bush (2) and with feed portion head tube (5), its characterized in that: a flange (1) is arranged at a feeding port of the feeding bushing (2), an inner cylinder (3) is arranged in the flange (1), and a spiral structure (6) is arranged on the inner surface of the inner cylinder (3); the feeding portion front pipe (5) is arranged in the inner cylinder body (3), and a gap is formed between the feeding portion front pipe (5) and the spiral structure (6).

2. A novel mill feed sealing structure as claimed in claim 1, wherein: an air injection pipe (4) is arranged outside the feeding part front pipe (5), and an air outlet (7) of the air injection pipe (4) corresponds to a gap between the feeding part front pipe (5) and the spiral structure (6).

3. A novel mill feed sealing structure as claimed in claim 2, characterized in that: one end of the gas injection pipe (4) is connected with an instrument gas source, the other end of the gas injection pipe (4) is sealed, and the gas injection pipe (4) is welded and fixed on the front pipe (5) of the feeding part in an annular shape.

4. A novel mill feed sealing structure as claimed in claim 3, characterized in that: and air outlets (7) with the diameter of 3mm are uniformly distributed on the surface of one side of the air injection pipe (4) corresponding to the gap between the front pipe (5) of the feeding part and the spiral structure (6).

5. A novel mill feed sealing structure as claimed in claim 1, wherein: the thread structure of the inner cylinder body (3) is T-shaped thread.

6. A novel mill feed seal structure of claim 5, characterized in that: the thread structure of the inner cylinder body (3) is a T-shaped thread with a tolerance in diameter.