JPS6055231A - Level detector of powder and granule or the like moving in inner part of rotating body - Google Patents

Abstract

PURPOSE:To detect accurately levels of powders and granules, etc. by providing a receiving plate swinging in contacting with surfaces of the powders and granules, etc. moving in an inner part of a rotating vessel and a detecting rod moving in up-and-down direction following the swing of the receiving plate. CONSTITUTION:A shaft 4 of the receiving plate 3 is inserted into a part protruded from a main body 1 of a rotating shaft 2, and a top end of a stopping screw 5 fixes the up-and-down movement by pressing. A plane part 2a whose one part is cut is provide to an upper part of the shaft 2 fitted to the body 1. A round hole 6 is formed above the main body of the part 2a, and the detecting rod 7 consisting of a piston part 7a and a rod part 7b is inserted into the hole 6, and the part 7a is fitted to the part 2a. By such a constitution, the levels of the powders and granules, etc. can be detected accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a level detection device for powder, granules, etc. moving inside a rotating body.

General When spray coating powders, granules, etc., centrifugal force is used to move the powders and granules at high speed while agitating the powder and granules from an optimal height above the surface of the powder and granules. It is necessary to spray V- evenly.

However, with spray coating, the volume of powder and granules increases over time, making it impossible to ensure spraying at an optimal height on the surface of the powder granules.

Conventionally, a variety of sensors such as photoelectric sensors and ultrasonic sensors have been used to detect the level of powders, granules, etc. Reliable detection of levels has been impossible and has therefore been manipulated exclusively by human means. In addition, there is a problem that sensors with a risk of ignition, such as photoelectric sensors, cannot be used with explosive solvents.

The present invention was invented in view of the above points, and aims to provide a level detection device that can accurately detect the level of powder, granules, etc. moving inside a rotating body. A configuration was adopted.

In other words, there is a receiving plate that swings in contact with the surface of powder, granules, etc. moving inside a rotating container, a detection rod that moves up and down in response to the swinging of the plate, and a detection rod that moves up and down in response to the swinging of the plate. It is constructed so that the level of powder, granules, etc. can be detected using an air micro switch that opens and closes automatically.

According to the present invention, there is a means for detecting the rocking motion of the receiving plate in contact with the surface of the powder, granules, etc., so minute and complicated height fluctuations of the powder, granules, etc. moving at high speed are realized. Make sure I
I can hold back.

In various mixers and granulators, even if the powder or granules in the container are gradually piled up on the edge of the container due to rotational operations such as centrifugation, these powders or granules are always The position of the spray nozzle can be controlled by detecting the level, so solvents, mixtures, coating agents, and granulating agents can be sprayed onto powders and granules while always maintaining a fixed distance. The accuracy of mixing and coating operations can be improved.

Furthermore, since an air sensor is used as the sensor, it can be constructed to be explosion-proof, and can be used in an extremely safe manner even in conventional granulators and mixers that cannot be used with phototubes depending on the solvent.

The embodiments shown in the drawings will be described below.

The device of the present invention is a detection device shown in Fig. 1.2.3,
A rotating shaft (2) is rotatably mounted on the detection device main body (1), and a shaft (4) of a receiving plate (3) is fitted into a portion of the rotating shaft (2) that protrudes from the main body (1). This vertical movement is controlled by the set screw (
5) It is designed to be fixed by pressing at the tip.

The rotating shaft (2) fitted into the main body (1) has a partially cut flat part (2a) on the upper part of the rotating shaft (2).
A detection rod (γ) consisting of a piston part (7a) and a rod part (7b) is formed in the round hole (6 holes) above the main body of a).
The piston portion (7a) is fitted into the flat portion (2a).

An I-cos link (9) is interposed between the piston part (a) and the cover (8) of the round hole (6), and the piston part (7a) of the detection rod (a) is always connected to the flat part (2a). is being pressed. The rod part (b) end of the detection rod (γ) is the ball Ll.
(1) is placed, and the ball α is in contact with the air micro switch (river spool (b)).

Now, the receiver rotates the rotating shaft (2) using the slight force caused by the powder or granules colliding with the plate (3). A part of the upper part of the rotating shaft (2) is cut to form a flat part (2a), and this flat part (2a) pushes the detection rod (7) upward. The detection rod (7) is always pressed downward by the spring (9), and the detection force can be adjusted by adjusting the strength of the spring (9).
) is the air micro switch (l) set at the top.
The υζ trowel is caught and the level of powder and granules is detected.

Since the above-mentioned detection device uses an air sensor, it can be constructed to be explosion-proof.

The detection device shown in FIG. 4 is a modified embodiment, and has a spring (9
) has been abolished and replaced with a flat part (2a) and a detection rod (7).
A Teflon bushing (6) is placed between the piston part (7a) of the
There is a Teflon bushing on the lid (8).
are using.

A Teflon bushing 0→ is also used for the fitting hole of the earth rotating shaft (2) into the main body (1).

As mentioned above, first? Although the configuration is different from that shown in Figure 3, there is no difference in functionality.

FIG. 5 shows an embodiment of the above-mentioned detection device when it is attached to a 8) rasp spray coating device. That is,
2) is a container in which powder or granules α6) is stored, whose bottom plate is rotated by a rotary motor αη, a spray gun (e) is used to spray the coating agent, and a draft pipe (b) is placed below. Then, hot air is blown into the hot air chamber) to dry the product. The detection device (E) is attached to the support arm Q with the spray gun (E) attached on the same circumference as shown in Fig. Install at right angles. Use the soil removal screw (5) to attach the receiving plate (3).
Adjust the position of the spray gun so that the height is optimal between the moving powder surface or granule surface and the spray gun. The support arm ψυ is attached to the column) and the column is attached to the hydraulic cylinder)
It is designed to move up and down.

The hydraulic cylinder and the detection device θ are connected as shown in FIG.

In other words, the air microswitch of the detection device (1υ is connected to the air source (c), and on the other hand to the speed controller) is connected to the pneumatic/hydraulic converter). The hydraulic cylinder is now activated.

Therefore the container rotated by the rotating motor)
Powder or grains gather around the outer periphery as shown in Figure 5, and are received by the plate (3) that receives the movement of this surface and activates the air micro switch (river), thereby triggering the mechanism shown in Figure 6. Then, by operating the hydraulic cylinder (F) and moving the column H up and down, the spray gun (B) can be maintained at the optimal height at all times. It is possible to spray while maintaining the coating temperature, which improves the precision of coating operations.

In addition, the vertical movement of the push-up ball α0) due to fine wavy irregularities on the powder surface is controlled by turning the air valve ON or OFF via the spool (B) in the air micro switch (11).
The FF opens and closes, but the speed controller Gi1
When connected, the air pressure/hydraulic converter C2 (to the cylinder) will not be moved unless air is being fed above a certain pressure.

Therefore, when the receiving plate +31 swings slightly from side to side due to whether it touches the powder or not, the cylinder does not operate. When the plate (3) hits the powder and tilts for a certain period of time, the cylinder is activated, so the fine irregularities on the powder surface cause the support arm (Qυ) to move up and down. There is no such thing as swaying and losing stability.

In other words, when the air valve is OFF, the receiver is on the plate (
When 3) is not touching the powder, the cylinder does not operate and the spray gun does not descend.

Therefore, when the air valve opens, the speed controller 86 will not be connected unless the cylinder) is extremely activated.

Even if the level of powder is detected using a phototube or static electricity, there is a risk of explosion depending on the nature of the powder or the solvent, but the device of the present invention uses an air micro switch, so it is safe. be.

Other vehicle invention detection devices can detect the level of objects that are not in a flat state. Conventional level detectors have difficulty detecting objects that are not in a semi-flat state, but the present invention detects the level of objects that are undulating or uneven. can be detected.

[Brief explanation of drawings]

1.2.3 are cross-sectional views of the detection device of the present invention viewed from different directions. FIG. 4 is a diagram of a modified embodiment of the detection device of the present invention. FIG. 5 is an explanatory diagram showing the state of use of the detection device of the present invention. The figure is an explanatory diagram showing a state in which a hydraulic cylinder and an air microswitch are coupled. (2)・・・・・・Rotating shaft (3)・・・・・・The receiver is a plate (7)・・・・・・Detection rod 0η・・・・・・... Air micro switch Figure 2 ゛゛°゛゛・1. . Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] A receiving plate that swings in contact with the surface of particles, granules, etc. moving inside a rotating container, a detection rod that moves up and down in response to the swinging of the plate, and a detection rod that moves up and down as the detection rod moves up and down. Powder moving inside a rotating body configured to detect the level of powder granules, etc. with an air micro switch that opens and closes.
Level detection device for granules, etc.