CN2754747Y

CN2754747Y - Flowing guider of powder selector

Info

Publication number: CN2754747Y
Application number: CN 200420109502
Authority: CN
Inventors: 王玉荣; 杨世宏; 刘兵
Original assignee: Nanjing C-Hope Mechanical & Electric Engineering Co Ltd
Current assignee: Nanjing C Hope Cement Engineering Group Co Ltd
Priority date: 2004-11-26
Filing date: 2004-11-26
Publication date: 2006-02-01
Anticipated expiration: 2014-11-26

Abstract

The utility model relates to a powder selector used in the cement industry, which solves the problems existing in the powder selector of lower powder selecting efficiency, larger ventilation resistance and larger abrasion of guide vanes. An air flow guider of the powder selector comprises an air pipe connected to the lower part of the power selector. The outlet position on the upper part of the air pipe is provided with guide vanes, and each guide vane is an arc-shaped bending plate surrounded by three sides, wherein one side is a curve which is connected with the inner wall of the air pipe; the other two sides are straight lines, and the intersection point of the two straight line sides is positioned on the axial line of the air pipe; the straight line side on the lower part is in the radial direction of the air pipe. As the improvement, two or more than two guide vanes are uniformly distributed on the same circumference surface of the air pipe. When the utility model is used and the dusty air enters the power selector, the rotary rising air flow can be generated, and as a consequence, the utility model raises gravity separation efficiency. The separated air can enter between a rotor and the guide vanes along the direction of the guide vanes, and thus, the utility model can reduce the ventilation resistance of the power selector and the abrasion degree of the guide vanes.

Description

The powder concentrator airflow guiding device

Technical field

The utility model relates to the powder concentrator in the cement industry.

Background technology

Powder concentrator is a kind of powders grading equipment, is mainly used in the closed-circuit grinding system of cement industry.

Present powder concentrator enters powder concentrator at dusty gas by the bottom airduct, slows down when rising in the circular passage between interior Outer Taper, and meal wherein relies on gravitational settling to realize gravity separation fully, and grinding efficiency is lower; Gas behind the gravity separation is through guiding during fan blade, could form the eddy current powder-separating area after need being directed to the fan blade forced steering between guiding fan blade and rotor, thereby produce bigger flowing resistance, makes the wearing and tearing aggravation of guiding fan blade simultaneously.

Summary of the invention

Problem to be solved in the utility model is that the powder concentrator grinding efficiency is lower, flowing resistance is big, the bigger problem of wearing and tearing of guiding fan blade.

Powder concentrator airflow guiding device described in the utility model comprises the airduct that is connected the powder concentrator bottom, is provided with guide vane in the exit on airduct top, and this guide vane is an arc-shaped bend plate that is surrounded by three limits; Wherein a limit is a curve, and the inwall of itself and airduct joins; The two other limit is a straight line, and the intersection point of these two straight lines is on the axis of airduct; The straight line of bottom at airduct in the radial direction.

As improvement, described guide vane quantity is more than 2 or 2, is evenly distributed on the same periphery of airduct.

As further improvement, the bottom straight line of described guide vane is connected with the top of a flat board, and a side of this flat board and the inwall of airduct join, and another side is on the axial direction of airduct.

Use the utility model, when dusty gas enters powder concentrator, can produce the rotation ascending air, thereby make thick material in the gas can under the acting in conjunction of centrifugal force and gravity, realize sorting for the first time, improve gravity separation efficient; Rotation gas after the sorting enters between rotor and the guide vane along the direction of guide vane, can reduce the flowing resistance of powder concentrator, can reduce the degree of wear of guiding fan blade simultaneously; Consistent along the airflow direction that the guide vane direction enters with the direction of rotation of rotor, can reduce the power of motor of powder concentrator.

Description of drawings

Fig. 1 is the structural representation of embodiment;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is guide vane and the dull and stereotyped connection diagram among Fig. 1;

Fig. 4 is the right view of Fig. 3;

Fig. 5 is the vertical view of Fig. 3.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Among Fig. 1 to 5, airduct 1 is connected on the bottom of powder concentrator (not shown), is provided with four guide vanes 2 in the exit, top of airduct 1.Guide vane 2 is arc-shaped bend plates that surrounded by three

limits

4,5,6; Wherein limit 4 is a curve, and the inwall of itself and airduct 1 joins; Two other limit the 5, the 6th, straight line, the intersection point 3 of these two straight lines is on the axis of airduct 1; The straight line 6 of bottom at airduct in the radial direction.

Four flat boards 7 join with guide vane 2 respectively, and the bottom straight line 6 of guide vane 2 is connected with the top of a flat board 7, and a side 8 of dull and stereotyped 7 joins with the inwall of airduct 1, and another side 9 is on the axial direction of airduct.

Four groups of guide vanes and dull and stereotyped in airduct inside are distributed on the same periphery of airduct symmetrically.

After using the utility model, when dusty gas enters powder concentrator and the deceleration rising of the circular passage between interior Outer Taper by bottom airduct 1, air-flow can very successfully become circular motion (shown in B among the figure) by the linear movement direction A among the figure, can produce the rotation ascending air like this, thereby make the coarse granule in the gas can be under the acting in conjunction of centrifugal force and gravity, go into meal rewinding tube along Outer Taper limit wall, realize sorting for the first time, improve gravity separation efficient.The direction that gas behind the gravity separation continues to rotate up along guide vane enters between rotor and the guide vane, forms horizontal eddy current powder-separating area, can reduce the flowing resistance of powder concentrator like this, can reduce the degree of wear of guiding fan blade simultaneously.The air-flow direction of rotation that enters along the guide vane direction is consistent with the direction of rotation of rotor, can reduce the power of motor of powder concentrator.

Claims

1. the powder concentrator airflow guiding device comprises the airduct that is connected the powder concentrator bottom, it is characterized in that: the exit on airduct top is provided with guide vane, and this guide vane is an arc-shaped bend plate that is surrounded by three limits; Wherein a limit is a curve, and the inwall of itself and airduct joins; The two other limit is a straight line, and the intersection point of these two straight lines is on the axis of airduct; The straight line of bottom at airduct in the radial direction.

2. powder concentrator airflow guiding device according to claim 1 is characterized in that: described guide vane quantity is more than 2 or 2, is evenly distributed on the same periphery of airduct.

3. powder concentrator airflow guiding device according to claim 1 and 2 is characterized in that: the bottom straight line of described guide vane is connected with the top of a flat board, and a side of this flat board and the inwall of airduct join, and another side is on the axial direction of airduct.