JPH0622436Y2 - Structure to prevent clogging in additive supply equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a structure for preventing clogging of a supply device for supplying a grinding aid, a trace additive, etc. to a media stirring type crusher or the like. is there.

(Prior art) A media stirring type crusher crushes a crushed material by stirring and mixing a hard crushing medium such as ceramic chips or steel balls and a crushed material placed in a horizontal cylindrical crushing tank with a stirrer. However, with this type of crusher, a general crusher is provided with an additive supply device for injecting a dispersant or the like near the crushed material supply port,
It was designed to prevent the agglomeration of the crushed material in the crusher.

(Problems to be solved by the invention) However, the fine powder of the ground crushed material is scattered by the agitation of the crusher and adheres to the supply port of the additive supply device to cause clogging. May aggregate.

In view of the above problems, the present invention solves the above problems, and provides an apparatus capable of reliably supplying a predetermined amount of additive without causing clogging during operation of a crusher. It is in.

(Means for Solving the Problem) As a means for solving this problem, the present invention is directed to a frustoconical needle shape in a supply chamber of a supply device main body having a small hole-shaped supply port opening to a crusher tank. Fitting an operating shaft with a projection, and moving the operating shaft with a predetermined stroke,
The needle-like protrusion at the tip is loosely fitted into the supply port so that the clogging of the supply port can be pushed away.

(Embodiment) An embodiment in which the feeder of the present invention is attached to a media stirring type crusher shown in the drawings will be described in detail below.

In FIG. 3, 1 is a horizontal cylindrical grinding tank,
The crushing tank 1 has a double structure in which a cooling water jacket 1c is formed between an outer wall 1a and an inner wall 1b. Cooling water jacket 1c
A cooling water supply pipe 2 for supplying cooling water and a drain pipe 3 for discharging warm waste water from the cooling water jacket 1c are connected to the. A crushed material supply port 1d is provided at the upper end on one side of the crushing tank 1, and a fixed amount feeder for continuously feeding the crushed material in the crushed material hopper 5a through the connecting pipe 4 in a fixed amount. 5 is connected. A screen 1e for separating the media M and the crushed material is provided on the other end side of the crushing tank 1, and the screen 1e also serves as a crushed material discharge port. A crushed material discharge pipe 1f having a downward opening is attached to the outside of the screen 1e, and only the crushed material is discharged through this. A horizontal rotary shaft 6 that constitutes an agitator (stirrer) is inserted in the center of the crushing tank 1, and the rotary shaft 6 is rotated by a motor 7 outside the crushing tank 1. A plurality of rod-shaped stirring members 8 are fixed to the rotating shaft 6 at predetermined intervals along the axial direction and radially with respect to the axis, and the rotating shaft 6 and the stirring member 8 constitute an agitator.

9 is a supply device, which is in the powder supply port 1d and the grinding tank 1
It is attached at a plurality of locations along the axial direction of. The supply device 9 is a device for supplying an additive such as a dispersant as a grinding aid or a coating agent for surface modification into the grinding tank 1. The details thereof are as shown in FIGS. 1 and 2. A large-diameter cylindrical supply chamber 11 is formed in the main body 10, and a supply port 13 communicating with the grinding tank 1 is opened at the center of a conical bottom wall 12 at the lower end thereof. Further, a lid plate 14 is covered on the supply chamber 11, and an air cylinder chamber 15 formed therein is connected to the supply chamber 11. Reference numeral 16 denotes an actuating shaft, which has pistons 17 and 18 at its upper end and central portion, respectively.The upper piston 17 is fitted in the air cylinder chamber 15, and the central piston 18 is fitted in the supply chamber 11. The operating shaft 16 is slidably fitted over the air cylinder chamber 15 and the supply chamber 11. A large-diameter guide body 19 having an inclined surface is formed at the lower end of the operating shaft 16, and the outer peripheral surface of this guide body 19 has longitudinal grooves 20 at equal intervals as shown in FIG. A conical needle-shaped projection 21 is provided so as to project. Reference numeral 22 denotes an additive storage tank, which is connected to a nozzle 24 opened on the side wall of the supply chamber 11 via a micro constant volume pump 23, and supplies the additive in the additive storage tank 22 to the supply chamber 11 from the nozzle 24. 25 is a two-way switch valve, which is an air cylinder chamber
It is connected to 15, and the piston 17 in the air cylinder chamber 15 is operated up and down by switching this.

The supply device 9 is operated in conjunction with the operation of the media stirring type crusher, and the crushed material supplied from the crushed material supply port 1d into the crushing tank 1 is stirred with the media M in the crushing tank. While being stirred by the member 8, it gradually advances from the left side to the right side in the crushing tank 1, and during the time, it is crushed by the mutual grinding action with the media. At the same time, the minute constant volume pump 23 is operated to supply the additive into the crushing tank 1 from the supply device 9, the switching valve 25 is switched at a constant interval, and the air cylinder chamber 15 is operated to operate the piston.
When the piston 17 is moved up and down, the needle-like projections 21 projecting from the guide body 19 at the lower end of the operating shaft 16 with the upward movement of the piston 17 pass through the supply port 13 and move upward to open the supply port 13. As a result, the dispersant which is the additive in the additive storage tank 22 is sent out from the nozzle 24 to the supply chamber 11, passes through the vertical groove 20 of the guide body 19, and is supplied to the supply port 13.
It is jetted and supplied into the crushing tank 1. Further, with the downward movement of the piston 17, the guide body 19 of the operating shaft 16 is positioned above the supply port 13 with a gap between the guide wall 19 and the bottom wall 12, and the needle-like projection 21 is fitted into the supply port 13 (see FIG. 1). See the chain line). Therefore, even if the powder of the crushed crushed material in the crushing tank 1 is attached to the supply port 13 and is dropped by the needle-like projections 21 coming in and out, clogging does not occur and the additive is reliably added in the crushing tank 1. The crushed material can be efficiently crushed without agglomeration.

(Effects of the Invention) As described above in detail with respect to the embodiments, in the supply device of the present invention, the needle-like projections provided on the actuating shaft that moves up and down with a predetermined stroke move into and out of the supply port to clean the supply port. Therefore, the powder that tries to adhere to the supply port is not scratched by the needle-shaped protrusions and does not cause clogging, and is always kept at a constant diameter, so a certain amount of additive can be secured. Can be supplied to. The upper needle-like protrusions open and close the supply port, and the guide body forms a gap with the supply port,
It is possible to smooth the supply of additives without causing the operating shaft to move downward due to the piston and causing abnormally high pressure.
It is possible to obtain a supply device that is robust and operates reliably.

[Brief description of drawings]

FIG. 1 is a vertical side view of the feeding device of the present invention, FIG. 2 is a plan view seen from below the operating shaft, and FIG. 3 is a schematic view of an embodiment attached to a media stirring type crusher. 9 …… Supply device, 10 …… Main body 11 …… Supply chamber, 13 …… Supply port 15 …… Air cylinder chamber, 16 …… Operating shaft 17,18 …… Piston, 19 …… Guide body 20 …… Vertical groove , 21 ... Needle-like projections 22 ... Additive storage tank 23 ... Micro constant volume pump, 25 ... Switching valve

Claims (1)

[Scope of utility model registration request] 1. An operating shaft is slidably attached to a main body having a small-hole supply port at one end, and a needle-like protrusion protruding from the tip of the shaft can be inserted and withdrawn while maintaining communication with the supply port. A structure for preventing clogging in a supply device for additives, which is characterized in that