JPH0357445Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is used in the process of molding refractory bricks, and is equipped with a segregation prevention mechanism that weighs, stirs, and supplies a certain weight of mixed soil into a metal frame installed in a press machine. Regarding a weighing device.

Conventional technology Methods for forming refractory bricks can be roughly divided into hydraulic presses,
There are two methods: mechanical forming using a friction press, etc., and hand forming using an air rammer, mallet, etc. In order to ensure the quality characteristic values of the product, even in the forming process, it is necessary to ensure the target raw square bulk specific gravity. The weight management of raw horn is emphasized and carried out. For this purpose, when forming firebricks, it is necessary to continuously supply a constant weight of stable clay.
Therefore, a weight measurement management method in which a fixed weight of mixed soil is weighed, and a volumetric weighing method in which a fixed volume of mixed soil is weighed are adopted.

The gravimetric weighing method is a method in which the clay is continuously fed from the hopper to the belt feeder into a weighing machine and weighed, and after weighing, the discharge gate is opened and the clay is fed into the metal frame. Although the accuracy is relatively accurate, as the amount of clay adhering to the weighing device increases, the weight of the clay actually put into the metal frame becomes more variable. Furthermore, there is a drawback that coarse particles are segregated when the clay is fed from the belt feeder to the weigher and from the weigher to the discharge gate into the metal frame.

This segregation is a separation phenomenon that occurs when powder consisting of coarse particles and fine particles is slid along a slope, and the greater the head difference, the more segregation generally occurs.

Problems that the invention aims to solve As mentioned above, methods to prevent this segregation include the use of an oscillating discharge gate, the method of placing a chain, cloth, etc. on the discharge gate area, and the method of pouring clay in a metal frame. Various methods such as kneading and stirring have been tried, but there is still no way to completely prevent this.
We are taking measures to prevent segregation with a digital weighing device that has recently been equipped with a mixing soil input port and a cleaning inspection port, a weighing container with a rotating device equipped with scrapers, and an auto-zero correction device and head correction device. Suggestions have been made, but none are perfect for solving the various problems.

Means for Solving the Problems The present invention was made with the aim of solving the problems of the above-mentioned conventional techniques and devices, and the gist of the present invention is that the weighing container 1 is , a lower-open type weighing case 2 having a flanged bellows 5 in its lower opening that abuts the top surface of the clay mixing container 10 to communicate the weighing container 1 and the mixing container 10 in a sealed manner; It consists of a clay stirring container 10 that reciprocates between the lower position of the case 2 and the upper position of the adjacent molding frame 22, and the clay mixing container 10 includes a rotary stirring blade 11 and an automatic discharge gate 1.
2. A flanged bellows 14, which is equipped with a discharge chute 13 and an inclination adjustment device 17, and which contacts the top surface of the metal frame 22 and communicates the clay mixing container 10 and the metal frame 22 in a sealed manner, is installed in the kneading chamber. A soil feeding device with a segregation prevention mechanism is provided at the lower opening of the soil stirring container 10, and is equipped with a transfer device 20 and a lifting device 21 for horizontally and vertically transporting the stirring container 10, and includes the following: The present invention will be explained in detail with reference to embodiments.

The device with a segregation prevention mechanism consists of a weighing device 18 and a mixing device 19, and the weighing device 18 is connected to a weighing container 1.
, a lower open type weighing container case 2 and a weighing section 3. The weighing container 1 is comprised of a rectangular parallelepiped container with an open top and a double-opening automatic gate 4 for discharging the mixed soil, which is opened and closed by an air cylinder (not shown) at the bottom. The weighing container case 2 is composed of a flanged bellows 5 at the bottom of the case, a dust collection port 6, and a transparent acrylic plate (not shown) on the wall of the case. The flanged bellows 5 is attached to the lower opening of the weighing container case 2, and is in contact with the top surface of the mixing container 10 to seal the weighing container case 2 and the mixing container 10. It is as follows.

The weighing section 3 includes a frame 7 that supports the device, a load cell 8 for weight weighing, and a weighing control device (not shown). The bottom of the frame 7 is fixed to the floor surface, and the load cell 8 has a function of measuring the entire weight of the weighing container 1. The weighing accuracy of the weighing controller is 1/5000, and the minimum scale is 10
It is g. The display is digital, and the target weighed weight value and the weighed weight value for low speed switching of the belt feeder 9 can be set.

The influence of an auto-zero correction device (not shown) that resets the weight in the container 1 to zero each time the kneaded soil is discharged and the amount of kneaded soil that is fed into the container 1 from the belt feeder 9 just before the end of weighing. It has a built-in function of a head correction device (not shown) to correct the difference.

The clay stirring device 19 is attached to a semi-cylindrical or semi-truncated conical container 10 and to the center of the axis of the container 10, and is chained at 15 to 30 rpm by a motor with a speed reducer (not shown). A double-opening automatic discharge gate 1 that opens and closes using a stirring blade 11 that rotates via a proket (not shown) and an air cylinder (not shown) attached to the bottom of the container.
2, a chute 13 attached to the bottom thereof,
A flanged bellows 14 surrounding the chute 13 and the like are attached to the lower part of the stirring vessel 10. When the flanged bellows 14 supplies the stirred clay into the metal frame 22, the flanged bellows 14 contacts the top surface of the metal frame 22 and connects the clay mixing container 10 and the metal frame 22 in a sealed manner. Completely prevents mixing soil dust from entering the work environment.

Further, the stirring container section 16 is provided with a stirring container inclination adjustment device 17, which allows the stirring container itself to be tilted at a desired angle according to the shape of the molded brick to be molded, for example, the shape of a tapered brick or the like. It exists as a mechanism.

Furthermore, a half-cylindrical or semi-truncated conical stirring container having a double-opening automatic discharge gate 12 that is opened and closed by an air cylinder (not shown) is moved back and forth and vertically by a hydraulic cylinder, and a lifting device 20 is provided. It is composed of a device 21.

EXAMPLE The weighing operation, stirring operation, and flow of mixing clay until the injection into the metal frame when molding refractory bricks using the apparatus of the present invention configured as described above will be explained in detail along with the operation of each apparatus. Weighing is started while putting the mixed soil conveyed by the belt feeder 9 into the weighing container 1 with the mixed soil discharge gate 4 attached to the weighing container 1 closed.

Dust generated when this kneaded soil is put into the weighing container 1 is collected through a dust collection port 6 attached to the weighing container case 2. When the weight of the soil in the weighing container 1 approaches the set weight, and the preset low speed switching setting value is reached, the soil loading speed of the belt feeder 9 changes from high speed to low speed. I have to. In addition, for weighing, a set value is set based on head correction, which takes advantage of the fact that the fall distance of the mixed soil that is thrown into the weighing container 1 becomes smaller when the mixed soil is put into the weighing container 1. When this happens, the conveying operation of the belt feeder 9 stops and the weighing ends.

Next, the stirring container 10, which is positioned so as to stop directly below the weighing container 1, is moved to the attached lifting device 21 with the soil discharging gate 12 closed.
It slowly rises until it comes into close contact with the flanged bellows 5 attached to the weighing container case 2, and then stops. Next, the clay discharge gate 4 attached to the weighing container 1 is opened, and the clay is transferred from the weighing container 1 to the stirring container 1.
Insert into 0.

Next, the easily replaceable stirring blade 11 attached to the stirring container 10 is operated for a set time (in this test,
Rotate (about 10 seconds) to stir the clay and then stop. Here, the dust generated when pouring the mixed soil from the weighing container 1 into the stirring container 10 and when stirring the mixed soil is collected through the dust collection port 6 attached to the weighing container case 2 and then outside. Does not generate dust.

Next, the stirring container 10, which is in close contact with the flanged bellows attached to the weighing container case 2, is brought to a set position by an attached lifting device 21 that is operated by hydraulic pressure or motor drive. Lower and stop. After the refractory brick molding frame 22 moves from the press-molding position to the brick extrusion position and stops, and the bricks are pushed out of the metal frame 22, the stirring container 10 is attached so as to be operated by hydraulic pressure or motor drive. The transfer device 20 moves the metal frame forward to the upper center of the metal frame 22, which is the set position, and then stops. Next, the stirring container 10 is lowered to a set position by the lifting device 21, and the flanged bellows 14 attached to the lower part of the stirring container 10 is loosely brought into close contact with the upper surface of the metal frame 22. The drilled soil discharge gate 12 is opened using an air cylinder or the like, and all of the drilled soil is thrown into the metal frame 22. At this time, the stirring blade 11 is repeatedly rotated in forward and reverse directions by the motor with a speed reducer, so that the mixed soil adheres to the stirring blade 11 and the weight of the mixed soil thrown into the metal frame 22 varies. prevent. Also, this stirring container 1
The dust generated when pouring the mixed soil into the metal frame 22 from 0 is collected through the dust collection port 15 attached to the stirring container 10.
Dust is collected through the filter and prevented from being released to the outside.

Effects of the invention As explained above, by using the apparatus of the invention, the following effects can be obtained, and refractory bricks with uniform quality can be formed. In addition, production efficiency was significantly improved, and favorable results were obtained in terms of the working environment and health and safety.
The effects will be specifically listed below.

(1) Knead the mixed soil just before putting it into the metal frame, and then lower the stirring container until it comes into close contact with the metal frame, making the loading head of the mixed soil 0.3m, which is the same as the conventional charging head (approximately 1.0m). In comparison, it can be reduced to about 1/3 or less, and refractory bricks without coarse grain segregation can be formed.

(2) The stirring container is easy to replace, and when molding large or long refractory bricks, it is possible to eliminate the segregation of coarse particles by replacing it with an arbitrary stirring container and stirring blade that match the shape. Can be molded without causing any damage.

(3) The clay discharge gate attached to the stirring vessel is coaxial with the stirring vessel and has an arc shape along the outer surface of the stirring vessel, so when the stirring blades stir the clay in the stirring vessel, it can reach every corner. It can be easily stirred and there is no unstirred portion.

(4) By adjusting the inclination angle adjustment device attached to the stirring container, the stirring container can be tilted to any angle and the mixed soil in the container can be tilted to make it suitable for long bricks, etc. such as tapered shapes. It is also easy to supply the clay.

(5) It is also easy to move the stirring container to the outside of the upper surface of the metal frame using the transfer device attached to the stirring device, and the work of replacing the metal frame etc. can be done safely and easily.

(6) Since the entire process of mixing soil from the weighing device to the injection into the metal frame is carried out in a sealed state, no dust is emitted to the outside.

(7) Since the weighing device and stirring device are separated, the operation of each device can be further simplified, failures can be reduced, and weighing accuracy can be improved. Furthermore, since it is displayed on a digital device, remote control is possible and a centralized automatic control method is also possible.

(8) Even if the clay adheres to the weighing container, the auto-zero correction device treats the amount as zero, so the accurately set weight of clay is fed into the metal frame without any influence from the amount of adhesion. be able to.

(9) Since the weighing device and the stirring device are independent, the operation time of each device can be overlapped to some extent, and the supply cycle of mixing soil can be shortened. Even when compared with the method of supplying the clay to the metal frame, the time required to supply the drilled clay to the metal frame remains the same.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention, and is a plan view of the arrangement of a weighing device and a stirring device. The symbols in the figure are as follows. 1... Weighing container, 2... Weighing container case, 3...
...Weighing section, 4...Automatic discharge gate for weighing container, 5
...Flanged bellows attached to weighing container case, 6...
Dust collection port for weighing container case, 7...Frame, 8...
...Load cell, 9...Belt feeder, 10...
... Stirring container, 11 ... Stirring blade, 12 ... Automatic discharge gate for stirring container, 13 ... Shute, 14 ...
... Bellows with flange attached to stirring container, 15 ... Dust collection port for stirring container, 16 ... Stirring container section, 17 ... Stirring container tilt adjustment device, 18 ... Weighing device, 19 ...
Stirring device, 20...transfer device, 21...lifting device, 22...metal frame.

Claims (1)

[Scope of utility model registration request] A lower open type having a weighing container 1 therein, and having a flanged bellows 5 in the lower opening that contacts the top surface of the mixing container 10 and communicating the weighing container 1 and the mixing container 10 in a sealed manner. It consists of a weighing case 2 and a mixing container 10 that reciprocates between a position below the weighing case 2 and a position above the adjacent molding frame 22, and the mixing container 10 has a rotary stirring blade 11, an automatic discharge A flanged bellows 14 includes a gate 12, a discharge chute 13, and an inclination adjustment device 17, and contacts the top surface of the metal frame 22 to communicate the mixing container 10 and the metal frame 22 in a sealed manner. Mixed soil stirring container 1
A transfer device 20 and a lifting device 21 are provided at the lower opening of the stirring container 10 and move the stirring container 10 horizontally and vertically.
A mixing soil supply device with a segregation prevention mechanism, which is characterized by being equipped with a segregation prevention mechanism.