JPH0323340Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sieve casing for a suspended rotating swing type sieving machine.

Traditionally, in flour mills, feed mills, etc., suspended, rotating, and rocking sieves are often used to crush grains, etc., and classify the pulverized products by particle size according to the desired purpose. . Therefore, in order to improve the quality of the sieved raw materials, it is effective to increase the sieve screen area and reduce the amount of raw material supplied per hour, but the size and weight of the sieve machine are In addition, it is inevitable that the installation area of the sieving machine will also become larger.

This invention solves the above-mentioned problems by supplying raw material with a uniform layer thickness in the width direction of the sieve screen and discharging the raw material across the width of the sieve screen, making it possible to effectively utilize the sieve screen area. Focusing on (A) each sieve unit 6
The perforated plate 12 is installed at the lower part of the raw material passage 10 in (B) the upper sieve 7a in each sieve unit 6
(C) In each stage of the sieve screen group of the sieve unit 6, the upper sieve screen frame 7 is provided near the upper edge.
a, 8a and the lower sieve mesh frames 7b, 8b, a slight step is provided, and a joint plate 14 is interposed at the step position; (D) the lowest sieve screen frame in each sieve unit 6; An appropriate number of return receiving plates 15 tilted forward and downward are provided on the lower surfaces of the upper sieve frames 7a and 7b excluding 8a and 8b. A sieve casing in a suspended rotating swing type sieve machine, characterized in that a guide groove 17 with a downward slope is provided between the raw material outlet 16 and the raw material discharge passage 18 at the lower ends of the screen frames 7b, 8b. This is related to.

An embodiment of this invention shown in the drawings will be described in detail.

First, the suspended rotating swing type sieving machine consists of an intermediate chamber 3 equipped with a rotating drive mechanism 4 and a sieve housing 2 fixed symmetrically on both left and right sides of the intermediate chamber 3. The main body portion is supported by being suspended from the body 1 by flexible hanging rods 5 on both sides, and is rotated and swung by a rotation drive mechanism 4. Each sieve casing 2 is provided with sieve units 6 in which sieve mesh frames are arranged in two upper and lower stages, or in three upper, middle and lower stages (not shown), stacked in an appropriate number of stages (in the case shown, three stages). It is being A distributor 9 having a raw material passage 10 divided into the number of sieve units 6 is attached to the upper part of each sieve housing 2, and discharge ports 11a and 11b for the sieved raw material are installed at the lower end. , 11c. Note that the number of the above-mentioned discharge ports corresponds to the number of sieves, and in the illustrated case, three are shown, and the distributor 9 is also divided into three raw material passages 10.

Fig. 5 shows a case where sieve units 6 are arranged in three stages, upper, middle and lower, in the sieve housing 2 on each side, and the number of sieve units 6 is determined according to the amount of raw material supplied per hour. Increase or decrease.

In each stage of the sieve unit 6, the width of the raw material passage 10 is made approximately equal to the width of the sieve screen frame 7a, and a perforated plate 12 is provided inside thereof. The size, number, and pitch of the through holes 12a of the perforated plate 12 are determined by the amount of raw material supplied per hour.

The feed material falls down the material passage 10, collides with the perforated plate 12 and stays there, and the through holes 12
a, and is uniformly diffused in the width direction of the raw material passage 10, and the raw material inlet 1 of each sieve unit 6
0'.

Next, near the raw material inlet 10' below the raw material passage 10 in each sieve unit 9, a diffusion plate 13 is attached so as to hang down, and the lower edge and the sieve frame 7
A gap is formed between the upper surface of the screen frame 7a and the diffusion plate 13 in the flow direction of the raw material so that the raw material on the sieve screen frame 7a can easily flow out along the diffusion plate 13. The diffuser plate 13 is arranged to be inclined, and the diffuser plate 13 may be curved downward in an arc shape if necessary. Note that by forming a gap between the inclined side end surface of the diffusion plate 13 and the side wall surface 2' of the sieve housing 2 in that direction, the diffusion plate 13 and the raw material inlet 10'
This is to prevent the feedstock from stagnation between the two.

Thus, in each stage sieve frame group of each sieve unit 6, upper sieve frames 7a, 8a and lower sieve frames 7b, 8
A slight difference in level is provided between each of them and b, and a joint plate 14 is interposed at the position of the difference in level. Note that the joint plate 14 is attached to the lower sieve frame 7b, 8b.
is on the same plane as the upper sieve frame 7a, 8b.
It is installed at a lower position.

Next, on the lower surface of the upper sieve frame frames 7a and 7b,
Return receiving plates 15 which are inclined toward the front and lower sides are provided at appropriate intervals. Note that the lowermost sieve screen frame 8a,
There is no need to provide the return receiving plate 15 on the lower surface of 8b.

Furthermore, the raw material outlet 1 in each sieve unit 6
6 is provided along the width direction of the lower edge of the lower sieve frame 7b, 8b, and between the raw material outlet 16 and the raw material discharge passage 18, there is a guiding groove 17 for the sieved raw material. The bottom plate 17a thereof is sloped downward toward the raw material discharge passage 18 side.

Since this device has the above-mentioned configuration, the powder raw material such as grain to be sieved is first sent to the distributor 9 and then supplied to the raw material passage 10 corresponding to each sieve unit 6. . The supplied amount collides with the perforated plate 12 in the raw material passage 10 and stays there, and passes through each of the through holes 12a.
The raw material is uniformly diffused in the width direction of the sieve unit 6 and guided to the raw material inlet 10' of each sieve unit 6. Therefore, the feed material comes to flow down from the raw material inlet 10' over the entire width direction of the upper sieve screen frame 7a,
This helps to uniformly perform the sieving action over the entire surface of the sieve mesh frames 7a, 7b. The feedstock is then
Since it hits the diffusion plate 13 and flows down along the slope of the diffusion plate 13, passing through the gap at the lower edge of the diffusion plate 13, the feed material is further diffused over the entire surface of the sieve frames 7a and 7b. This has the effect that the material flow layer has a substantially uniform thickness, and the sieving action is performed extremely well. Furthermore, the sieve mesh frames of each stage of the sieve unit 6 are provided with a step between the upper sieve mesh frames 7a, 8a and the lower sieve mesh frames 7b, 8b, with a joint plate 14 interposed therebetween. Due to this, the raw material flowing down the upper sieve mesh frames 7a, 8a is connected to the connecting plate 20.
Since it falls on top and scatters the raw materials, it has the effect of promoting the sieving action. In addition, by providing a return receiving plate 15 on the lower surface of the upper sieve frames 7a and 7b, a part of the raw material passed through the upper sieve frames 7a and 7b and sieved is transferred to the lower side. Stage sieve frame 8
Since it flows down to the position on the upstream side of screens a and 8b, there is an effect that the screening area of the screen frames 8a and 8b in the lower stage can be used effectively.

Note that each stage of the lower sieve screen frame 7b of each sieve unit 6,
Raw material outlet 16 and raw material discharge passage 1 at the lower end of 8b
Since the guide groove 17 having a downward slope is provided between the raw material 8 and the raw material discharge passage 18, the raw material can be smoothly discharged and can be quickly discharged to the raw material discharge passage 18.

In this way, not only can the feed material be spread in the width direction of each sieve frame to supply a uniform raw material layer thickness, but also a part of the sieved raw material can be transferred to the upstream side of the lower sieve frame. In combination with the return feed, there is an effect that the sieve screen area can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a front view of a suspended rotating swing type sieve with this invention, Fig. 2 is its top view, Fig. 3 is its right side view, and Fig. 4 is the same as Fig. 5. The cross-sectional plan view taken along line A-A, FIG. 5, is taken along line B-B in FIG.
The vertical sectional front view along the line, FIG. 6, is C- in FIG.
The cross-sectional plan view along line C, FIG. 7, is the same as D in FIG.
- It is a longitudinal right side view taken on the D line. Reference numeral 1 in the drawing shows the body of the sieving machine, 2... the sieve casing, 2'... its side wall surface, 3... its intermediate chamber,
4...Swivel drive mechanism, 5...Hanging rod, 6...Sieve unit, 7a, 7b...Upper sieve screen frame, 8a, 8b
... Lower sieve screen frame, 9 ... Distributor, 10 ... Raw material passage, 10' ... Lower entrance thereof, 11a, 11
b, 11c...Each outlet, 12...Perforated plate, 12
a... Through hole, 13... Diffusion plate, 14... Joint plate, 15... Return receiving plate, 16... Raw material outlet,
17... Guide groove, 17a... Its bottom plate, 18...
This is the raw material discharge passage.

Claims (1)

[Scope of utility model registration request] A sieve casing 2 that stores a large number of sieve nets is suspended on both sides by hanging rods 5, 5 on the machine body 1, and the sieve casing 2
Inside the sieve housing 2, there is a sieve unit 6 consisting of upper sieve frames 7a, 7b and lower sieve frames 8a, 8b. are stacked in multiple stages, and a fixed amount of raw material is supplied to each sieve housing 2 from a distributor 9 provided at the top through a raw material passage 10, and the sieved raw materials are discharged to discharge ports 11a, 11b, 11c at the bottom. In a suspended rotating swing type sieving machine for discharging from
A perforated plate 12 is installed near 0', and
A diffusion plate 13 is attached hanging near the upper edge of the upper sieve frame 7a, and in each sieve frame group of each sieve unit 6, upper sieve frames 7a, 8a and lower sieve frames 7b, 8b are attached. A slight step is provided between the upper sieve frames 7a and 7b of each sieve unit 6 except for the lowermost sieve frames 8a and 8b. An appropriate number of return receiving plates 15 which are inclined forward and downward are provided on the lower surface, and each stage of the sieve screen frame 7b of each sieve unit 6,
Raw material outlet 16 and raw material discharge passage 1 at the lower end of 8b
A sieve casing characterized in that a downwardly sloped guide groove 17 is provided between the sieve casing and the sieve casing 8.