CN2214850Y

CN2214850Y - Flour grading machine

Info

Publication number: CN2214850Y
Application number: CN 95203727
Authority: CN
Inventors: 徐家驹; 孟琰斌
Original assignee: Tianjin Tianbao Flour Mill; Research Institute of Physical and Chemical Engineering of Nuclear Industry
Current assignee: Tianjin Tianbao Flour Mill; Research Institute of Physical and Chemical Engineering of Nuclear Industry
Priority date: 1995-03-01
Filing date: 1995-03-01
Publication date: 1995-12-13
Anticipated expiration: 2005-03-01

Abstract

The utility model relates to a single-purpose flour grading machine for production. The utility model is made according to the centrifugal grading principle with the dry method. The utility model has high grading efficiency, simple structure, less investment, low energy consumption and convenient maintenance operation. The utility model comprises a variable speed motor, a sealing cover, an upper casing body, a lower casing body, a partition board, a grading impeller, an annular cascade, a current deflector, etc. The grading impeller is composed of a flour loosing vane, a grading vane and a balancing vane. The motor is directly arranged on the upper casing body through the vertical direction, the sealing cover is fixed to the center of the upper casing body, the partition board is positioned between the upper casing body and the lower casing body, and the grading impeller is sheathed on the shaft head of the cantilever of the motor. The annular cascade is fixed to a supporting board in the lower casing body, a material supplying pipe is connected with the current deflector, and the material supplying pipe and the current deflector are firmly fixed to the partition board by a fixing rib.

Description

Flour grading machine

The utility model belongs to microparticle classification field, is specifically related to a kind of flour grader that flour is divided into different piece by granular size.

At present, food service industry uses the different flour of protein content as the tailored flour of making food such as various high-quality biscuits, cake, and the size of protein content and flour particle has relation.Therefore, according to big young pathbreaker's flour classification of flour particle diameter, can directly produce or manage to make the tailored flour of various different purposes.According to conventional grinding method, flour can be divided into below the 17 μ m by particle size, the above three kinds of class of 18～40 μ m and 40 μ m.Traditional stage division has wet classification and sieve method.Wet classification needs to carry out powder drying and liquid handling later on, and is very uneconomical, general use few.It is comparatively general that sieve method uses, application number is that 92214045.6 patent application discloses a kind of compact multi-level flour mill, its flour stage division is to set up a classification dividing plate dressing sieve is divided into the two-stage dressing sieve in the middle of the dressing sieve of flour mill, cooperate with it and be provided with two discharge ports, select the dressing sieve thin,tough silk of different stage, and, can produce secondary or three grades of flour simultaneously at slag notch access discharger.Sieve method has many shortcomings: 1. use sieve method that powder is handled in a large number and be difficult to carry out continued operation, when powder directly reduces to a certain degree face to face, there are causes such as tack, coherency and Electrostatic Absorption because of material, screening efficiency is obviously descended, finally cause screen cloth to stop up.2. be limited to 100 μ m under the classification of sieve method particle diameter, plan tells the flour of the high protein below the 17 μ m by sieve method and the low-protein flour of 18-40 μ m is impossible.3. the grader efficient height that has but complex structure, equipment is huge, the sealing requirements height, floor space is big, and power consumption is big, maintenance difficult.

The purpose of this utility model is to provide a kind of technology reasonable, simple in structure, and novel flour grader low, that be convenient to keep in repair consumes energy.

The technical solution of the utility model is as follows:

The flour grader comprises the motor that can change rotating speed as required, upper shell, lower house, seal cover, dividing plate, feeder sleeve, classifying turbine, annular cascade, fixedly rib and deflector.Classifying turbine is that loose powder blade, graded blade and balance vane group become by three groups of blades.Motor directly is installed on the upper shell with vertical direction, seal cover is fixed in the central authorities of upper shell, dividing plate is between upper shell and the lower house, impeller set is on the cantilever spindle nose of motor, annular cascade is fixed on the gripper shoe in the lower house, feeder sleeve is connected with deflector, and is fixed on the dividing plate firmly by fixing rib.

The utility model has following accompanying drawing:

Fig. 1 is the utility model front view

Fig. 2 is the annular cascade vertical view

Fig. 3 is the classifying turbine front view

Fig. 4 is that classifying turbine A is to view

Fig. 5 is that classifying turbine B is to view

Fixedly rib, 8 deflectors, 9 lower houses, 10 feeder sleeves, 11 cantilevered axle, 12 gripper shoes of 1 motor, 2 seal covers, 3 upper shells, 4 dividing plates, 5 classifying turbines, 6 annular cascades, 7 among Fig. 1.

13 is the blade of annular cascade among Fig. 2; 17 is wheel cap among Fig. 3, and 18 is wheel disc; 16 is graded blade among Fig. 4, and 14 is the loose powder blade; 15 is balance blade among Fig. 5.

Annular cascade as shown in Figure 2,19 blades and interior circle are oriented in a tangential direction and are uniformly distributed on the ring surface.

Classifying turbine as shown in Figure 3,26 graded blades are by radially being distributed in the periphery equably.

The loose powder blade as shown in Figure 4,14 loose powder blades are by radially being distributed in the impeller below equably.

Balance blade as shown in Figure 5,16 balance blades are by radially being distributed in the impeller top equably.

The course of work of the present utility model is as follows: along with the rotation of classifying turbine, the powder of given concentration and the mixture of air are carried by means of strength, by feeder sleeve, then along loose powder vane channel, flow to the periphery of classifying turbine, and enter impeller earlier. Under the comprehensive function of the centripetal force that centrifugal force and air stream by the vane rotary generation cause, coarse granule greater than classification point particle diameter throws away impeller outer, and borrow self gravitation to drop to the below of lower house, discharged by the coarse grain mouth, fine grained less than classification point particle diameter enters the impeller center with air stream, enter in the upper shell after walking around dividing plate, discharge through the fine powder mouth again. When classification, be forced to impeller outer and flown out owing to the reasons such as collision have on a small quantity powder less than classification point particle diameter inevitably, for again sending back to this part powder in the impeller, introduce the auxiliary air of some through annular cascade, the introducing of this part air, can improve classification efficiency, and make the coarse dust that throws away in the impeller fall into quickly the below of lower house. Loose powder blade between classifying turbine and deflector is broken up the powder ball except being used for, and also makes its outside uniform distribution from the centre, and makes powder obtain the branch speed identical with the vane rotary direction. And the balance blade between classifying turbine and the dividing plate is used for stoping coarse dust to flow into the impeller center with air, produces overcurrent.

The utility model has the advantages that: 1. owing to can manage to regulate rotating speed and the control air mass flow size of classifying turbine, so not only grading range is wide, can also separate sphere, sheet and fibrous powder. 2. adopt the loose powder blade construction between deflector and the classifying turbine, sphere or the loose one-tenth of sheet powder ball can be suspended in separately airborne powder one by one, make the thorough fluidization of material, improve the fine powder rate of recovery. 3. auxiliary air enters grading room with tangential direction by annular cascade, and having played significantly, " purge " effect can improve classification efficiency effectively. 4. the balance blade between classifying turbine and the dividing plate separates thick, two spaces of fine powder, has also effectively improved classification efficiency. 5. motor bearings and powder are kept apart effectively by seal cover, have both guaranteed that bearing oil does not pollute flour, guarantee that also the flour grain does not enter bearing, make equipment can be for a long time, reliably operation. 6. loose powder blade, graded blade, balance blade organically are combined into one, and processing technology is good, compact conformation, and it is little, easy to maintenance to consume energy.

Embodiment:

The utility model comprises the motor 1 of variable-ratio, seal cover 2, upper shell 3, dividing plate 4, classifying turbine 5, annular cascade 6, deflector 8.Classifying turbine 5 is by loose powder blade 14, and graded blade 16 and balance blade 15 are formed, and it is installed as Fig. 3, Fig. 4, Fig. 5.The motor 1 of variable-ratio directly is installed on the upper shell 3 with vertical direction, and seal cover 2 is fixed in the central authorities of upper shell 3, and dividing plate 4 is between upper shell 3 and the lower house 9, and classifying turbine 5 is enclosed within on the cantilever spindle nose 11 of motor 1.Annular cascade 6 is fixed on the gripper shoe 12 in the lower house 9.Feeder sleeve 10 is connected with deflector 8, and is fixed on firmly on the dividing plate 4 by fixing rib 7.

Claims

1, a kind of flour grader, comprise variable speed machine (1), seal cover (2), upper shell (3), dividing plate (4), classifying turbine (5), deflector (8) is characterized in that: classifying turbine (5) is by loose powder blade (14), and graded blade (16) and balance blade (15) are formed, between motor (1) and upper shell (3), seal cover (2) is housed, the annular cascade (6) that is used to introduce auxiliary air is housed in lower house (9).

2, flour grader according to claim 1 is characterized in that 14 loose powder blades (14) are fixed on classifying turbine (5) below equably.

3, flour grader according to claim 1 is characterized in that 16 balance blades (15) are fixed on classifying turbine (5) top equably.

4, flour grader according to claim 1 is characterized in that 26 graded blades (13) are in the wheel disc (18) that has loose powder blade (14) equably and between the wheel cap (17) that has balance blade (15).

5, flour grader according to claim 1 is characterized in that by seal cover (2) motor (1) and powder being separated.