JPS5857225B2 - Sieving machine with ventilation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention supplies powder material to a rotating sieve screen cylinder in a sealing machine housing, and locally blows pressurized air through an air injection nozzle disposed close to the outer peripheral surface of the sieve screen cylinder. The sieve screen cylinder is blown onto the sieve screen cylinder to blow away and clean the material that adheres to or gets stuck in the sieve screen and clogs it, and annular air chambers are provided on the outer periphery of both ends of the sieve screen cylinder.
Pressurized air is fed into the sieve cylinder to blow it out into the sieve cylinder from the gap between both ends of the sieve cylinder and the wall plate supporting both ends of the sieve cylinder. This prevents the materials inside the cylinder from leaking into the separation chamber from the gaps between the support parts at both ends of the sieve screen cylinder, and also places a sawcloth dust collection cylinder inside the separation chamber and suctions air from the outside to prevent the inside of the separation chamber from becoming negative. pressure and no,
This invention relates to a sieving machine that uses aeration in combination with ventilation, in which fine powder inside the sieve cylinder is sucked out and sieved by aeration from the inside of the sieve cylinder to the outside of the sieve cylinder.

The configuration of the present invention will be explained with reference to the drawings.

A is a rectangular sealed machine casing, and one half of the machine casing A is supported on a metal plate provided on one side of the plywood.

Inside the machine cabinet a, a wall plate 2 parallel to the wall plate 1 on the side of the machine cabinet a is provided in the middle part, and a separation chamber C is formed between the wall plates 1 and 2. Circular openings are formed concentrically opposite each other in the front part of the machine casing, and a bottomed supply cylinder 3 is inserted outside the opening in the middle wall plate 2 through the upper wall opening of the machine casing a, and a supply cylinder 3 with a bottom is inserted into the bottom side wall thereof. The supply tube 3 is fixed to the outer surface of the wall plate 2 by connecting the formed opening with the opening of the wall plate 2, and the discharge pipe 4 is connected to the opening of the wall plate 1 on the outside of the wall plate 1. The discharge pipe 4 is fixed to the outer surface of the wall plate 1, and an opening/closing adjustment plate 5 is provided at the input port of the supply tube 3 that protrudes outside the upper wall of the machine housing.
has been established.

Reference numeral 7 denotes a rotating shaft passing through the center of the opposing openings of the wall plate 1 and the wall plate 2, one end of which passes through the discharge pipe 4 and is supported by a bearing 8 provided outside the discharge pipe 4, and the other end is supported by a bearing 9 provided on the outside of the supply cylinder 3 through the outer wall of the supply cylinder 3, and both ends of the sieve screen cylinder 100 are fitted and supported in the openings of the wall plates 1 and 2.

The sieve screen cylinder 10 is formed by connecting and fixing annular plates 11 of the same diameter to both ends of a cylindrical sieve screen having approximately the same diameter as the openings of the wall plates 1 and 2. The annular plate 11 is fitted and supported in the openings of the plate 1 and the wall plate 2, and is fixed to the tip of the support arm 12 attached to the rotating shaft 7, and as the rotating shaft 7 rotates, the sieve screen cylinder 10 is inserted through the supporting arm 12. A mantle tube is fitted onto the rotating shaft 7 between the supporting arms 12 on both sides, and the center hole of the circular control plate 13 from the inner diameter of the sieve screen cylinder 10 is fitted and fixed to the mantle tube to form a supply cylinder. A transfer spiral 14 is attached to the rotating shaft 7 in the rotary shaft 3.

15 is a chain gear attached to the outer protruding end of the bearing 9 of the rotating shaft 7;
Reference numeral 6 denotes an electric motor installed at the rear between the wall plate 1' on the opposite side of the machine cabinet a and the wall plate 2 in the middle part. I am 18 years old.

Note that this chain gear and chain can be replaced with a pulley and belt.

Reference numeral 19 denotes an air injection nozzle having a narrow groove-shaped nozzle, and the nozzle is arranged vertically at one place on the outer circumferential surface of the sieve screen cylinder 10 close to the sieve screen surface, and is installed in the wall plate of the machine casing a. An air distribution chamber 20 is provided at the front lower part of the wall plate 1 and the air distribution chamber 20.
An air blower 22 is installed at the front of the middle stage of the gold frame, with the air pipe 21 connecting the ventilation hole and the air injection nozzle 19.
The upper air outlet of the air distribution chamber 20 is connected to the lower opening of the air distribution chamber 20.

Reference numeral 23 denotes an annular air chamber provided on the outer periphery of the annular plate 11 at both ends of the sieve screen cylinder 100. On the outer periphery of the annular plate 11, an annular wall plate 24 with a circular cross section is provided at a portion adjacent to the tip of the annular plate 11. An opening is formed in the wall plate 24, and the base end of the wall plate 24 is fixed to the inner surfaces of the wall plates 1 and 2 to form an annular air chamber 23, and a ventilation hole is formed in the wall plate 24. and a ventilation hole bored in the air distribution chamber 20 are connected by an air pipe 25.

Reference numeral 26 is a control valve rod having a control valve at its tip, and the two control valve rods 26 are slidably supported through the air distribution chamber 20, and the control valve at the tip is bored in the air distribution chamber 20. Each vent is facing each other.

At the rear of the separation chamber C formed between the wall plate 1 and the wall plate 2 of the machine cabinet, numerous circular openings are provided at appropriate intervals in the soil wall of the separation chamber C, and these openings have their upper ends open. A large number of woven cloth cylinders 27 are suspended in the separation chamber C by connecting the open upper ends of the woven cloth cylinders 27 whose lower ends are sealed.

28 is attached to the upper surface of the separation chamber C with its both sides attached to the upper surface of the separation chamber C.
This is an intake chamber extending to both sides of the separation chamber C, and the bottom of the upper surface of the separation chamber C is open to connect the E cloth cylinder 27 in the separation chamber C and the intake chamber 2.
8, and an intake pipe 30 connects the bottom opening of the external extension of the wall plate 2 to the intake port of an exhaust fan 29 installed at the rear of the bottom of the metal frame.

Reference numeral 31 denotes a motor installed at the front of the bottom of the metal frame, and its driving shaft is connected to the windmill rotating shafts of the blower 22 and the blower 29 by pulley belts.

A funnel-shaped receiver 32 is provided at the bottom of the separation chamber C formed between the wall plate 1 and the wall plate 2 of the machine casing to receive the material falling through the mesh of the sieve screen cylinder 10. An opening/closing plate 33 is attached to the opening/closing plate 33.

Reference numeral 34 denotes a discharge tube arranged vertically on the outside of the wall plate 1 of the machine cabinet.The discharge tube 6 provided in the discharge source 4 is connected to the opening at the lower front side of the discharge tube 34, and the upper end of the discharge tube 34 is bent and expanded. The upper opening of the pipe is connected to the bottom opening of the external extension of the wall plate 1 of the intake chamber 28, and a partition plate 35 with a plurality of circular openings is installed in the middle part of the exhaust pipe 34 to open the opening. The open upper end of the sawcloth tube 36, which has an open upper end and a closed lower end, is connected to the discharge tube 34, and an opening/closing plate 37 is attached to the lower end opening of the discharge tube 34.

A piping is installed in the intake chamber 28 at a place that communicates with the separation chamber C, and a high-pressure air nozzle 38 facing the open upper end of the sawcloth tube 27 is connected to the piping, and a high-pressure air nozzle 38 is installed outside the machine casing a. An electromagnetic air valve 41 and a time switch 42 are provided in the middle of the pipe 40, and are automatically operated electrically to intermittently supply high-pressure air to the sawcloth pipe 29.
The structure is such that fine powder that is deposited and deposited on the cloth tube 27 is peeled off by spraying it inside.

Next, the effect will be explained.

The motor 16 is operated, and the chain gear 15, chain gear 18, and chain gear 17 transmit the power to the rotating shaft 7 to rotate the sieve screen cylinder 10 and the transfer spiral 14, and the motor 31 is operated to operate the wind turbines of the blower 22 and the exhaust fan 29. Pressure air is fed into the air injection nozzle 19 and the annular air chamber 23 from the air distribution chamber 20 which rotates and is connected to the blower 22, and air is sucked from the outside by the blower 29, the intake pipe 30, and the intake chamber 28. The inside of the separation chamber C is made negative pressure.

When a material to be sieved, such as powder, is put into the supply cylinder 3, the material is sent into the sieve screen cylinder 10 by the transfer spiral 14.
Particles that are sieved by the sieve screen cylinder 100 revolutions escape from the opening to the outside of the sieve screen cylinder 10, fall into the funnel-shaped receiver 32 at the bottom of the separation chamber C, and are stored. Particles that cannot pass through the sieve screen are transported inside the sieve screen cylinder 10 and sent to the discharge pipe 4, and then through the discharge pipe 6 to the discharge pipe 34.
taken from.

Since the control plate 13 provided inside the sieve cylinder 10 is a disc with a diameter slightly smaller than the inner diameter of the sieve cylinder 10, the material flows through the gap between the sieve cylinder 10 and the control plate 13, and this By this action, the flow is controlled so that the material supplied into the sieve screen cylinder 10 does not flow too quickly into the discharge pipe 4.

Among the materials fed into the sieve screen cylinder 10, some of the particles having a diameter slightly larger than the sieve screen opening size fit into or adhere to the sieve screen openings, resulting in clogging.

A part of this clog falls off after 100 revolutions of the sieve screen cylinder, but those that are firmly stuck become permanently clogged, reducing the sieve screen area and reducing the sieving power.

In the present invention, an air injection nozzle 19 having a narrow groove-shaped jet nozzle is arranged in a vertical direction at one location on the outside of the sieve screen cylinder 10 with the jet nozzle close to the outer peripheral surface of the sieve screen, and a blower 22 is connected to the air injection nozzle 19.
Since pressurized air is fed through the air distribution chamber 20 and atomized into the screen cylinder 10, the screen cylinder 1
The sieve screen surface is cleaned by blowing away the particles that have become stuck in the sieve screen, thereby restoring the sieve screen area and increasing the sieving efficiency.

Furthermore, if there is a gap in the fitting sliding part where the annular plates 11 at both ends of the sieve screen cylinder 10 are fitted and supported in the openings of the wall plate 1.2, the air inside the sieve screen cylinder 10 will pass through the gap and become negative. In this case, there is a possibility that particles in the sieve cylinder 10 will flow to the separation chamber C, but in the present invention, an annular air chamber 23 is provided on the outer periphery of the annular plate 11 at both ends of the sieve cylinder 100. Since the air chamber 23 is fed with pressurized air through the air distribution chamber 20 from the blower 22, the pressurized air fed into the annular air chamber 23 is sent to both ends of the screen cylinder 10. The sieve screen cylinder 1 is removed from the gap between the fitting sliding part between the annular plate 11 and the openings of the wall plates 1 and 2.
The sieve screen cylinder 10 prevents the air flowing into the sieve screen cylinder 10 from flowing out from the fitting sliding part of the wall plate opening and the annular plate 11 together with coarse particles inside the sieve screen cylinder 10. The pressurized air flowing into the screen cylinder 10 pushes back and blocks the escape air, thereby preventing particles in the screen cylinder 10 from leaking into the separation chamber C.

Inside the separation chamber C, a number of sawcloth cylinders 32, each having an open upper end and a sealed lower end, are suspended behind the sieve cylinder 10 by connecting the open upper ends to an opening provided in the soil wall of the separation chamber C. , an intake chamber 28 communicating with the sawcloth pipe 34 was provided on the upper wall of the separation chamber C, and the intake chamber 28 was connected to the exhaust fan 29 through the intake pipe 30.
The inside of the separation chamber C is loaded by the suction of the exhaust fan 29, and the air inside the sieve cylinder 10 is constantly sucked out to the outside of the sieve cylinder 10, and is injected from the air injection nozzle 19 to the sieve cylinder 10.
The air entering the screen flows outwardly through the mesh, thereby facilitating the sieving action of the fine particles within the screen cylinder 10.

Most of the fine particles that have passed through the mesh of the sieve screen cylinder 10 settle due to gravity and are deposited in the funnel-shaped receiver 32 at the bottom of the separation chamber C.
The extremely fine particles riding on the airflow are collected by the sawcloth tube 34 and attached to the outer peripheral surface of the sawcloth tube 34, and these fine particles are collected by the sawcloth tube 34.
By intermittently back-injecting high-pressure air from an air compressor 39 through a conduit 40 into a high-pressure air nozzle 38 disposed at the upper end opening of the tube 4, the outer periphery of the sawcloth tube 34 is heated. Removes accumulated fine particles.

Intermittent injection of high-pressure air is performed by an electromagnetic air valve 41 provided in the pipe line 40.
is injected intermittently by electrically automatically operating the time switch 42.

Note that a sawcloth pipe 36 is provided hanging inside the discharge pipe 34, and the discharge pipe 34 is connected to the intake chamber 28 and the exhaust fan 29 via the intake pipe 30.
Since the discharge pipe 6 of the discharge pipe 4 is connected to the discharge pipe 34,
The fine powder in the material discharged can be collected by the saw cloth pipe 34.

In the present invention, an air injection nozzle is provided on the outer peripheral surface of the sieve screen cylinder in close proximity to the sieve screen, and pressurized air is locally blown onto the sieve screen to eliminate clogging of the sieve screen, thereby ensuring that the sieve fraction is properly sieved. At the location where the annular plates at both ends of the sieve screen cylinder are fitted and supported in the openings of the wall plate, annular air chambers are provided around the outer periphery of the annular plates at both ends of the sieve screen cylinder, and pressurized air is provided. The air flows into the sieve cylinder from the annular air chamber through the gap in the fitting support part between both ends of the sieve cylinder and the wall plate opening, and the air in the sieve cylinder is brought with particles by the air flow into the sieve cylinder. It is possible to prevent leakage into the separation chamber from the gap between the fitting support part and the wall plate opening, and by placing a sawcloth cylinder inside the separation chamber and suctioning air from the outside to create a negative pressure inside the separation chamber, the sieve screen By venting from the inside of the cylinder to the outside of the sieve cylinder, the fine powder inside the sieve cylinder is sucked out and sieved, so it is extremely effective in classifying materials containing fine powder such as powder by sieving, especially in classifying fine powder.

In addition, since the sieving device using the sieve screen cylinder and the fine powder collection device using the sieve cloth cylinder are combined into one machine housing, there are advantages such as less equipment space and ease of operation.

[Brief explanation of the drawing]

Figure 1 is an external view of the sieving machine combined with ventilation of the present invention, Figure 2
The figure is a plan view, Figure 3 is a front view, Figure 4 is a side view, Figure 5 is a sectional view taken along line CC in Figure 3, Figure 6 is a sectional view taken along line CC in Figure 3, and Figure 7 is Figure CC line sectional view, Figure 8 is Figure 3D
-D line sectional view and FIG. 9 are explanatory diagrams of the operation of the present invention, where A is shown in side cross section and B is shown in plan cross section. a...Kikan, b...Kinso, C...
... Separation room, 11 ... Wall plates on both sides of the machine cabinet, 2.
・・・・・・Wall plate in the middle part of the machine casing, 3... Supply tube, 4... Discharge pipe, 6... Discharge pipe, 7.
...Rotating shaft, 8,9...Bearing, 10...
... Sieve mesh cylinder, 11 ... Annular plate, 12 ...
...Support arm, 13...Control board, 14...
... Transfer spiral, 19 ... Air injection nozzle, 2
0...Air distribution room, 22...Blower,
23... Circular air chamber, 24... Annular wall plate, 21° 25... Air pipe, 26...
・Adjustment valve rod, 27...Futsu pipe, 28...
Suction chamber, 29...Exhaust fan, 30...Intake pipe, 32...Funnel-shaped receiver, 34...
Discharge pipe, 35... Partition plate, 36... Sawafu pipe, 38... Nozzle, 39... Air compressor, 40...・Pipeline, 41... Solenoid air valve, 42... Time switch.

Claims (1)

[Claims] 1 Concentric circular openings are provided in the opposing wall plates of the separation chamber formed in the hermetic machine housing, and the opening in one wall plate is for the supply cylinder, and the opening in the other wall plate is for the discharge pipe. The openings are connected to each other, and the annular plates at both ends of the sieve cylinder, which are formed by connecting annular plates to both ends of a cylindrical sieve screen, are fitted and supported in the openings of the opposing wall plates to drive and rotate the sieve screen cylinder. On one side of the outside of the screen cylinder, an air injection nozzle with a groove-shaped blowhole is arranged vertically with the blowhole close to the screen surface, and the rings at both ends of the screen cylinder are An annular air chamber is formed on the outer periphery of the plate, and an opening is provided near the air chamber and the annular plate, and an air pipe is connected to the air injection nozzle and the annular air chamber from an air distribution chamber connected to a blower. No need to introduce pressurized air through the
In addition, inside the separation chamber, there are a number of sawcloth tubes with open upper ends and sealed lower ends, which are suspended by connecting the open upper ends to openings in the earthen wall of the separation chamber. A sieving machine combined with ventilation, characterized in that an intake chamber communicating with a cylinder is provided, and the intake chamber is connected to an exhaust fan via an intake pipe.