JPS6223491A - Method and device for removing clogging of screen net - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method and apparatus for automatically removing clogging of a sieve screen that occurs during the process of sieving powder and granular materials. .

[Conventional technology]

Powdered raw materials used in the steel industry, food industry, and other industries may need to be sorted into particles of uniform particle size depending on the purpose of use. A method is adopted in which the sieve screen provided in the sieve screen is vibrated, and the raw material powder is sieved while moving from the top to the bottom of the sieve screen.

During the sieving process, the powder and granules of the raw material move from the upper part of the sieve mesh to the lower part while being vibrated, and the powder and granules adhere to the sieve mesh, or the powder and granules get caught in the sieve mesh. Otherwise, the sieve screen becomes clogged. As a result, the efficiency of the sieve decreases, and particles with particle sizes other than those intended for use may be mixed in, impeding product uniformity and stable operation. Therefore, when the sieve screen becomes clogged, the clog has been manually removed using a hammer or a protrusion.

[Problem that the invention seeks to solve]

However, such conventional methods of removing clogging require 20 to 30 minutes of human effort per meter of sieve screen, and it takes 3 to 4 workers to clean the entire sieve screen. 3
Time and man-hours are expended. As a result, there is a problem in that the operating rate of the sieving equipment is significantly reduced and the uniformity of the product is hindered.

This invention was made with attention to such a problem, and uses the vibration of the sieve screen to move the floating body and apply it to the sieve screen to remove clogging of the sieve screen. The purpose is to

[Means to solve the problem]

In order to solve such an object, this invention arranges a floating body on the sieve screen of the sieve equipment, and the sieve screen surface is moved by the floating body by applying vibrations generated by the sieve equipment to the floating body. A method for removing clogging from a sieve screen, characterized in that the sieve screen is struck by its own weight, and preferably, a floating body is placed on the sieve screen of the sieve equipment, and the sieve is subjected to vibrations generated by the equipment. The present invention provides an apparatus for removing powder particles adhering to the sieve screen by moving the floating body over the sieve screen while vibrating the sieve screen.

Therefore, in order to carry out these methods, the vibrating sieve is equipped with a floating body that hits the surface of the sieve screen by vibrating freely on the sieve screen in response to the vibration of the equipment. A screen clogging removal device, a floating body that moves the sieve on the sieve screen in response to the vibration of the equipment, a moving device that automatically reciprocates the floating body on the sieve screen, and a moving device that automatically moves the floating body back and forth on the sieve screen, and a moving device that moves the floating body back and forth on the sieve screen after the reciprocating movement is completed. The present invention provides a method for removing clogging of a sieve screen, comprising a storage device that automatically stores the floating body, and the floating body is provided with a large number of protrusions.

[Effect]

The sieve equipment is operated without supplying powder or granules, and the sieve screen is vibrated. Next, a driving means such as a piston motor is activated to lower the stored floating body. When the numerous protrusions provided on the surface of the movable body facing the sieve screen come into contact with the sieve screen, a limit switch in the storage device is activated to stop the drive source and start the motor of the moving device. Therefore, the movable body located at the lower end of the sieve is moved toward the upper end of the sieve by the moving motor, and is moved by the vibration of the sieve. As the floating body moves, the protrusions repeatedly impact the clogging of the sieve mesh and peel it off. In this way, when the floating body reaches the upper end of the sieve screen and engages with the rimming switch provided at that position, the moving motor is switched from a stopped state to reverse rotation, and the floating body While moving in the opposite direction, that is, toward the lower end of the sieve screen, it descends due to its own weight, and when it reaches the lower end, the moving motor is stopped by being provided at that position or engaging with a Mitsutwitch. The storage device is activated and the floating body is automatically stored.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 to 6 show one embodiment of the invention.

First, for convenience of explanation and understanding, the structure of the apparatus will be mainly explained. 1 is a cylinder body, and 2 is a vibration spring that supports the cylinder body 1. Reference numeral 3 denotes a sieve screen, which is attached to the cylinder body l. Reference numeral 10 denotes a floating body, which holds a plurality of floating bodies 12 via beams 11. Guide plates 13 are provided at both ends of the beam 11 and guide the floating body 10 inside the cylinder body 1 so that it does not meander when the floating body 10 moves. Reference numeral 13a denotes a connecting fitting, which is provided on the guide plate 13.

The floating part 12 includes a substrate 12 having claws in the form of a large number of rod-shaped protrusions 12a for peeling off and removing clogging generated in the sieve screen 3.
b, and an elastic plate 12c made of a rubber plate or the like that attaches the substrate 12b to the beam 11. Reference numeral 14 denotes an auxiliary floating body having a large number of protrusions, which is connected to the beam 11 by a chain described later, and is used to remove deposits from the fixed plate 3a of the sieve screen 3.

Reference numeral 20 denotes a moving device for moving the floating body 10. 21 is a winding shaft around which a chain 23 is wound. This chain 23 suspends the floating body 10 via the connecting fitting 13a of the guide Fi13. 2
2 is a drive motor that rotates the winding shaft 21 in forward and reverse directions to wind and unwind the chain 23, and lifts and lowers the floating body 10 on the slanted sieve W13. .

Reference numeral 30 denotes a storage device, which in this embodiment is provided as a set of two, so that the two can operate at the same time.

Further, 31 is a hook that engages with the beam 11 of the floating body 10. A piston 32 moves the hook 31 up and down. Furthermore, 33 is a piston motor that drives the piston 32.

In addition, 41 and 42 are limit switches provided near the upper and lower ends of the sieve body 1, respectively, and the beam 1 of the floating body 10
1, a signal is sent to a control section (not shown), and the motor 22 and piston motor 33 are rotated in forward and reverse directions, so that the floating body 10 is moved up and down and retracted. .

Next, the operation of this embodiment will be explained.

First, the sieving equipment is operated without supplying the sieving material powder and granules, and the sieve screen 3 is brought into a vibrating state. Next, when the piston motor 33 is started, the floating body 10 suspended by the hook 31 of the storage device 30 descends, and when the rod-shaped protrusion 12a, which is a claw, lands on the sieve screen 3, it is placed inside the storage bag W30. The limit switch is activated to stop the piston motor 33 and to start the motor 22 of the moving device 20 in the forward rotation direction. Therefore, as the chain 23 is wound around the winding shaft 21, the floating body 10 that was below the sieve screen 3 moves upward away from the hook 31, but in this process it receives vibrations from the sieve screen 3 and becomes unsteady. It repeats regular bouncing movements (floating motions) to peel off and remove clogs. In this way, when the floating body 10 reaches the upper end of the sieve 4M3 and the beam 11 engages with the dog 41a of the Mitswitch 41, the drive motor 22
The chain 23 is switched from stopping at one end to reverse rotation.
Since the floating body 10 is rewound, the floating body 10 descends due to vibration and its own weight, and moves below the sieve screen 3 while repeating the floating movement. Then, as shown in FIG. 3, when the beam 11 of the floating body 10 knocks down the dog 42a of the limit switch 42 and engages the hook 3 of the storage device 30,
The drive motor 22 of the moving device 20 is stopped, the screw 1-in motor 33 is started in the forward rotation direction, and the floating body 10 is moved to the hook 3.
1 and rises, and the storage device 30 is held at the upper limit position.
The piston motor 3 is installed inside the
3 stops, and accordingly, the floating body 10 also stops rising and enters the retracted state. Incidentally, the particulate matter adhering to the fixed plate 3a of the sieve screen 3 is removed by the bouncing movement of the auxiliary floating body 14 attached to the floating body 10.

FIG. 7 shows another embodiment of the device.

15 is a non-elastic arm, which corresponds to the elastic plate 12c shown in FIG. There is.

Moreover, 17 is a metal fitting, which restricts the range of left and right movement of the arm 15. This floating body also receives the vibration of the sieve screen 3, and similarly to the floating body 10 of the above embodiment, &IJ]L,
Remove clogging of the sieve screen 3.

In these Examples, it was confirmed that the clogging treatment time could be reduced to about 1/10 of the conventional time.

〔Effect of the invention〕

As described above, according to the present invention, since the floating body moves in response to the vibration of the sieve screen and hits the sieve screen, clogging of the sieve screen can be automatically and efficiently removed without manual effort. As a result, labor can be significantly reduced, and furthermore, product equalization and sieving have the remarkable effect of improving the operating rate of the equipment.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of one embodiment of the present invention, FIG. 2 is an explanatory diagram of its operation, FIG. 3 is an explanatory diagram partially explaining the operation in FIG. 2, and FIG. A front view of the body, Figure 5 is a top view of Figure 4, Figure 6 is A-A in Figure 4.
A line sectional view, and FIG. 7 is a side sectional view showing another embodiment. 3... Sieve screen 10... Moving body 20... Moving device 30... Storage device 12a... Protrusion (claw)

Claims (4)

[Claims] (1) A sieve screen characterized in that a floating body is placed on a sieve screen of a sieving equipment, and vibrations generated by the sieving equipment are applied to the floating body so that the surface of the sieve screen is struck by the weight of the floating body. How to remove clogs. (2) Arranging a floating body on the sieve screen of the sieving equipment, applying vibrations generated by the sieving equipment to the floating body, and moving the floating body on the sieve screen while causing the vibration. , a method for removing clogging of a sieve screen, characterized by removing particulate matter adhering to the sieve screen. (3) A sieve screen clogging removal device characterized by comprising a floating body that hits the sieve screen surface by freely vibrating on the sieve screen in response to the vibrations of the vibrating sieving equipment. (4) A floating body that moves on a sieve screen in response to vibrations of the sieving equipment, a moving device that automatically reciprocates the floating body on the sieve screen, and a moving device that automatically moves the floating body back and forth after completing the reciprocating movement. 1. An apparatus for removing clogging of a sieve screen, characterized in that the movable body is provided with a large number of protrusions.