JPS5925515Y2 - Sieve screen clogging removal device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for removing clogging of a sieve screen, which sieves powdered material without vibrating the sieve screen.

Conventionally, sieving equipment is used to classify powder and granular materials into those that pass through the mesh and those that do not, by moving the powder along the top surface of a vibrating sieve screen stretched at a certain angle of inclination. When sieving contaminated powder and granules, clogging occurs, which is a problem, but whenever such clogging occurs, workers must stop the operation and clean the sieve screen. As a result, the production capacity is reduced, and if the clogging is overlooked and operation is continued in the clogged state, there are problems such as producing defective products.

The present invention was completed to solve these drawbacks, and the illustrated embodiments will be described in detail below.

Reference numeral 1 denotes a mount frame installed on the upper surface of the foundation, and a discharge port 3 is connected to the lower end of the mount frame 1 via an anti-vibration spring 2 on the upper surface of the mount frame 1.
A vibrating feeder 4 equipped with the following is supported in a floating state, and a box-shaped base 6 having an opening 5 at its sloping upper end surface is attached to the lower part thereof.

Reference numeral 7 denotes a pair of support shafts that are rotatably supported on one side by bearings 9 attached to the walls on both sides of the base 6 via brackets 8. is a frame-shaped frame whose upper and lower end surfaces are formed along the upper inclined surface of the base 6, whose outer circumference is slightly smaller than the inner circumference of the base 6, and whose lower end is inserted into the inside of the base 6. A chute member 10 is rotatably supported on both sides thereof.

Further, on the upper surface of the chute member 10, the chute member 1
A casing 11 provided at approximately the same slope as the base 6 is attached via support legs 12, and the casing 11 has an opening 13 approximately the same size as the upper end opening 5 of the base 6 at the middle part of the lower end. In addition, there is a supply chute 1 on the upper side wall.
An input port 15 is provided in the lower end wall, communicating with the discharge chute 16, and a discharge port 17 is provided in the lower end wall.

Furthermore, in the middle part inside the casing 11, one end is fixed to a locking part 20 at the tip of an adjustment bolt 19, which is attached to the frame 18 installed between the side walls of the upper end so that it can move forward and backward. A sieve screen 23 is fixed to a frame 21 installed between the side walls at the lower end and supported by a support member 22 erected from the bottom wall at a position close to the frame 18, and is substantially parallel to the bottom wall. The sieve screen 23 is stretched in an inclined manner, and the sieve screen 23 is moved forward and backward by rotating a nut screwed onto the adjustment bolt 19.
The tension is adjusted and maintained at an appropriate tension state at all times2
Reference numeral 4 denotes a vibration shaft supported by bearings 26 attached to both side walls of the casing 11 via support frames 25, and in the embodiment, 4 are provided in parallel horizontally, and the vibration shaft 24 is located outside the casing 11. The other end of a crank arm 28, one end of which is pivotally connected to a vibration rod 27a of an electromagnetic vibrator 27 fixed to the support frame 25, is fitted to the end. The proximal end of a plate-shaped vibrator 29 whose tip is brought into close contact with the lower surface of the sieve screen 23 is fixed to the portion located at the sieve screen 23 . is rotated forward and backward via the vibrating rod 27a and the crank arm 28, the vibrator 29 vibrates around the vibrating shaft 24, vibrates the sieve screen 23 in the vertical direction, and the sieve screen 23 is fed from the inlet 15. The particles moving downward along the sieve screen 23 are sieved, and the particles passing through the screen are passed through the openings 5 and 13 of the casing 11 and the base 6 to a filter (not shown) provided on the base 6 side. The material is fed to a conveyor or the like, and lumps and other objects that do not pass through the mesh are discharged from a discharge port 17 and collected in a collection box (not shown) or the like.

Further, support members 3 protruding from both sides of the upper part of the casing 11 are provided.
0, a rod member 34 includes an adjustment rod 33 whose lower end is rotatably supported by a bracket 31 and whose rear end is screw-coupled to a support tube 32 whose inner circumferential surface is threaded with iron film.
, are rotatably connected via a pin 35, and by turning the handle 36 left and right and moving the adjustment rod 33 up and down, the casing 11 is rotated around the support shaft 7 and its inclination angle can be changed. It is now possible to do so.

In addition, four racks are placed in horizontal parallel below the sieve screen 23, and near the middle positions of the vibrating shafts 24, each of which is located slightly below the sieve screen 23,
Blow pipes 37 are rotatably supported parallel to the vibration shaft 24 at their ends outside the casing 11 by bearings 38 attached to the support legs 12.

In addition, blow nozzles 39 are provided protrudingly provided at approximately equal intervals in the portion of each blow pipe 37 located inside the casing 11, and a rotary joint 40 and a solenoid valve are provided at one end of the blow pipe 37 outside the bearing 38. 41. Main piping 43 of a compressed air source (not shown) is connected through piping joints 42 and the like, and compressed air is supplied into each blow pipe 37 by individually turning on and off a solenoid valve 41. is now available.

Therefore, in this embodiment, if each of the three blow pipes 37 installed in parallel horizontally is operated one by one, the blow air amount is sufficient for one blow pipe 37, and the air storage tank is also smaller accordingly. This can be done with capacity.

Note that 44 is a blind lid provided at the other end of the blow pipe 37.

Also, the bearing 38 outside the casing 11 of the blow pipe 37
A link 45 and a pin 46 are located between the rotary joint 40 and the rotary joint 40.
, a piston rod 50 of a cylinder 49 rotatably supported is connected to a cylinder bracket 48 whose rear end is attached to the support leg 12 via a connecting rod 47;
By the operation of the cylinder 49, the blow nozzle 39 together with the blow pipe 37 is provided so as to be able to reciprocate between a horizontal position and a 125° upward position rotated clockwise from the horizontal position, and an inlet/outlet for the working fluid of the cylinder 49. 51.
The rotational speed of the blow nozzle 39 is controlled by adjusting the speed control valves 53 and 54 connected to the sieve screen 52, and is determined depending on the clogging state of the sieve screen 23.

Reference numerals 55 and 56 indicate limit switches that are attached to the switch bracket 57 so as to be able to come into contact with a contact plate 58 that is fixed to the connecting rod 47, and are used to confirm the forward and return ends of the cylinder 49. It is provided.

Further, the upper cover 11a attached to the upper end surface of the casing 11 with bolts can be removed by attaching and detaching the bolts.

Further, 59 is a guide chute provided at the input port 15 of the casing 11.

Next, the operation of the device configured as described above will be explained.

The powder and granular material supplied from the vibrating feeder 4 to the upper surface of the sieve screen 23 of the casing 11 via the chute 14 and the input port 15 is
The powder and granule particles, which are moved toward the discharge port 17 on the upper surface of the sieve screen 28 which is in a vibrating state due to the operation of the electromagnetic vibrating body 27, pass through the screen on the way and fall downward, and the particles are transported to the openings 13 and 5.
The particles that do not pass through the mesh are collected on a conveyor (not shown) provided on the side of the base 1, while the particles that do not pass through the mesh are collected at the discharge port 17.
In this operating state, the working fluid controlled by the speed control valve 53 is supplied to the inlet/outlet 51 of the cylinder 49 to retract the piston rod 50, and at the same time 3. A first solenoid valve 41 connected to the blow pipe 37 located closest to the inlet 15 among the flow pipes 37 disposed in non-parallel manner.
is opened and compressed air is supplied from the main pipe 43 to the pipe joint 42, solenoid valve 41. When supplied to the blow pipe 37 through the rotary joint 40, the blow nozzle 39 blows out compressed air from its tip while being rotated clockwise from the horizontal position and blows out the sieve screen 2.
3 blows the clogged powder and granules upward to eliminate the clogging of the sieve screen 23 near the upper part of the blow pipe 37, and then closes the first electromagnetic valve 41 and A second solenoid valve (
(not shown), compressed air is supplied from the main pipe 43 to the middle blow pipe 37 via this second electromagnetic valve, etc., and by repeating the reciprocating operation of the cylinder 49, the horizontal position and the 125° upward position are changed. Compressed air is ejected from the tip of the blow nozzle 39, which is rotated back and forth between the sieve screen 2 above.
Clear the clogging in step 3.

Next, after closing the second solenoid valve (not shown), open the third solenoid valve (not shown) connected to the blow pipe 37 located closest to the discharge port 17, and repeat the same process as above. Sieve screen 2
This prevents clogging in step 3.

That is, the present invention repeats this operation for a predetermined period of time to remove the sieve screen 2.
The sieve screen 2 is used to remove clogging powder and granules.
Depending on the clogging condition of the sieve screen 23, the blowing time for each blow pipe 37 or the total blowing time for all the blow pipes 37 can be arbitrarily set. It is something that can be resolved.

For example, if the clogging is severe, each blow pipe 37
By increasing the set time such as 1 hour of blowing and 1 hour of total blowing, and by slowing down the rotation speed of the blow nozzle 39, the blowing effect will be greater and the powder and granules attached to the sieve screen 23 can be easily removed. It is.

In the above embodiment, the blow pipe 37 is connected to the sieve screen 2.
3, the racks are arranged in the width direction, but the racks may be arranged in the longitudinal direction, and the number of blow pipes 37 can be arbitrarily selected.

Furthermore, the compressed air storage tank may be enlarged to supply compressed air to the blow pipe 37 at the same time, and the entire surface of the sieve screen 23 may be blown with air at the same time. A casing with a discharge port on each side is tilted and covered with an iron lid, and a sieve screen whose tension and angle of inclination can be adjusted and which can be vibrated by the operation of a vibrating device is installed near the middle of the inside of the casing. The sieve screen is stretched to maintain a constant tension along the inclined surface of the bottom wall, and blow nozzles are provided protruding from the bottom surface of the sieve screen at approximately equal intervals along the longitudinal direction, and the rotation speed can be controlled by a drive device. Since the structure is such that multiple blow pipes are rotatably arranged at regular intervals, the sieve screen is always maintained in a proper condition without clogging, and is operated efficiently, covering the entire surface of the sieve screen. Because the cleaning is done effectively, production capacity increases dramatically, and since there is no need for workers to bother each time a blockage occurs, it helps to save labor, and furthermore, since there is no chance of a blockage being overlooked. It exhibits various effects such as always producing good quality products.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the invention, Fig. 2 is a partially cutaway enlarged side view of the sieve device section, and Fig. 3 is an A--
It is an A' arrow sectional view. 11...Casing, 15...Input port, 17...Discharge port, 23...Sieve screen, 3
7...Blow pipe, 39...Blow nozzle.

Claims (1)

[Scope of utility model registration request] A casing installed at an angle and having a powder inlet on the upper side and an outlet on the lower side, and a bottom wall inclined surface of the casing provided near the middle of the inside of the casing so that the tension can be adjusted. A sieve screen is stretched along the sieve screen at a proper tension at all times and is vibrated by the operation of a vibrating device, and the inclination angle of the sieve screen is adjustable. They are arranged at regular intervals in the sieve screen inclination direction and are rotatably supported near both ends.
The vicinity of one end is connected to the piston rod of the cylinder via a link, pin, and connecting rod, and the working fluid inlet and outlet of the cylinder are connected to a compressed air supply source via a speed control valve, and one end Compressed air piping is connected via rotary joints, solenoid valves, and piping joints.
A sieve screen clogging removal device comprising a plurality of blow pipes whose rotational speeds can be controlled, each having blow nozzles projecting thereon at approximately equal intervals in the longitudinal direction.