JPH0450897Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention avoids clogging of the rice husk discharge section of the rice huller used as the main equipment in a rice hulling adjustment plant used as a shared facility. It concerns safety equipment.

(b) Prior Art Conventionally, in a rice hulling adjustment plant, a sensor is placed in the portion where the rice husks that have been hulled in the hulling machine and then wind-selected are conveyed and discharged into the rice husk chamber by the rice husk conveying pipe. Techniques for changing the rotational speed are known.

For example, Japanese Patent Application Laid-Open No. 60-222152.

Furthermore, in order to detect clogging of a conveyance pipe in a rice hulling machine, it is a well-known technique to provide a clogging sensor chamber and install a sensor therein, such as the technique described in Japanese Utility Model Publication No. 33-15021.

(c) Problems to be solved by the invention The invention detects clogging of rice husks in the rice husk conveying pipe more easily than before, issues a warning that the rice husks are clogged, and even if emergency measures are not taken. If there is no rice huller, the structure is such that the huller is stopped.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

In a configuration in which the rice husks wind-selected after being hulled by the huller are air-transported through the rice husk conveying pipe 3 by the discharge air from the rice husk conveying fan 5 and carried out into the rice husk chamber 6, at an intermediate part of the rice husk conveying pipe 3. A clogging sensor chamber 9 is provided that protrudes upward from the inner diameter portion of the rice husk conveying pipe 3, and a fixed wall 9a made of a vertical wall orthogonal to the conveying direction of the rice husk conveying pipe 3 is provided on the upstream side of the clogging sensor chamber 9. erected,
A pipe clogging sensor A is arranged on the fixed wall 9a.

(E) Embodiments and operations The purpose and structure of the present invention are as described above. Next, the structure and operations of the embodiments shown in the attached drawings will be explained.

Fig. 1 is a sectional view of the rice huller equipped with the safety device of the present invention and the rice husk conveying pipe 3, Fig. 2 is a perspective view of the clogging sensor chamber 9, and Fig. 3 is a section of the clogging sensor A of the pipe. The sectional view and FIG. 4 are layout diagrams of the adjustment facility equipped with a safety device for the rice huller of the present invention.

The arrangement of the adjustment facilities will be explained in Fig. 4.

The paddy discharged from the drying device is put into the storage tank 10 and cooled. After cooling, the rice is taken out by the belt conveyor 11 and fed into the hulling machine of the present invention by the rice lifting machine 15.

The mixed rice of brown rice and paddy after being hulled by the huller is fed into the sorting device 12 by the mixed rice elevator 16. The paddy sorted by the sorting device 12 is returned to the huller, and the brown rice is fed into the brown rice tank 14 by the brown rice elevator 17 after passing through the grain size sorter.

The present invention relates to a safety device that detects clogging of the rice husks conveyed by the rice husks conveyed by the rice hulling machine incorporated as the main equipment of such a regulating facility and gives an alarm.

Referring to FIG. 1, the overall structure of the rice hulling device will be explained.

A paddy tank is arranged above the huller B, and the paddy dried by the drying device is carried into the paddy tank. The paddy is put between the hulling rolls 7, 7 from the hulling tank, and the hulling rolls 7, 7
Due to the difference in peripheral speed of rotation, the paddy is dehulled and becomes brown rice and rice husk. The mixture of brown rice and rice husks is transferred from the hulling rolls 7, 7 to the mixed rice conveyor 19.
During the fall, only the rice husks are sorted by the sorting air from the wind selection fan 8 and reach the rotary valve 4. The rotary valve 4 prevents the air discharged from the wind selection fan 8 from blowing into the rice husk transport pipe 3, and conversely prevents the air discharged from the rice husk transport fan 5 from blowing into the rice huller B. .

The rice husks dropped in a fixed amount by the rotary valve 4 are pneumatically conveyed through the rice husk conveying pipe 3 by the discharge air from the rice husk conveying fan 5, and are discharged into the rice husk chamber 6.

The rice husk room 6 is generally attached to the outside of the building housing the rice hulling adjustment plant, and cannot be seen by the operator who monitors the status of the rice hulling machine B inside the building. .

Therefore, over time, the inside of the rice husk chamber 6 becomes filled with rice husks, and then the inside of the rice husk conveying pipe 3 is also clogged, and finally, when the rotary valve 4 becomes clogged, the rotary valve 4 becomes clogged. Rotation becomes impossible, rice husks accumulate inside the huller B, and even the mixing rice conveyor 19 and wind sorting fan 8 become unable to rotate, leading to overload and destruction of various parts.

The present invention solves this problem, and the clogging in the rice husk conveying pipe 3 is caused by the rotary valve 4.
The aim is to detect blockages before they reach the point where they occur.

Next, the configuration of the pipe clogging sensor A and the clogging sensor chamber 9 will be explained with reference to FIGS. 2 and 3.

The clogging sensor chamber 9 is located above the middle part of the rice husk conveying pipe 3. The clogging sensor chamber 9 is arranged between the rotary valve 4 and the outlet to the rice husk chamber 6.

The clogging sensor chamber 9 constitutes a recess that is recessed from the inner diameter of the rice husk conveying pipe 3, and inside the recess, a pipe clogging sensor A is provided on the upstream side.
This constitutes the fixed wall 9a.

A pipe clogging sensor A is installed at the fixed wall 9a.
By arranging this, it is possible to eliminate the malfunction of the pipe clogging sensor A in the case where there is no normal clogging.

In particular, when stones and metals get mixed into the rice husk and pass through the rice husk conveying pipe 3, these solid objects will not collide with the pipe clogging sensor A and causing the pipe clogging sensor A to malfunction.

The structure of the pipe clogging sensor A is such that a limit switch 1 is disposed inside, and a sensor plate 2 that presses the limit switch 1 constitutes a lid portion of the pipe clogging sensor A.

When the rice husk chamber 6 is filled with rice husks and the inside of the rice husk conveying pipe 3 is also filled with rice husks, the inside of the clogging sensor chamber 9 is also filled with rice husks, and the filled rice husks are filled with rice husks. Sensor plate 2 moves due to pressure and turns on limit switch 1.
Switch to .

When the limit switch 1 is turned on, the rice husk clogging warning lamp lights up and the warning buzzer also sounds.

(f) Effects of the invention Since the present invention is constructed as described above, it has the following effects.

First, by providing a concave portion protruding from the inner diameter of the rice husk conveying pipe 3 and using this as the clogging sensor chamber 9, and arranging the pipe clogging sensor A on the upstream side of this portion, ordinary rice husks can be conveyed smoothly. In this case, the pipe clogging sensor A will not malfunction, and the system can be made with fewer mistakes.

Second, especially when stones and metals get mixed into the rice husk and pass through the rice husk conveying pipe 3, these solid objects will not collide with the pipe clogging sensor A and causing the pipe clogging sensor A to malfunction. .

Thirdly, if the rice husk conveyance pipe becomes clogged, the balance of the wind separation, dust removal, and sorting mechanisms in the entire adjustment facility will be disrupted, and the performance of these mechanisms will be adversely affected.
Since the present invention can detect clogging of the rice husk conveying pipe in advance, it is possible to maintain the performance of the wind sorting, dust removal, and sorting mechanism at all times throughout the plant flowchart.

Fourthly, by detecting the clogged state before the rice huller B becomes clogged, the rice huller B can be automatically stopped early, and the rice huller B and the rice husk transport fan 5 can be stopped automatically. There is no risk of damaging the rotary valve 4, etc.

Fifth, since clogging is detected in a narrow space within the rice husk conveying pipe 3, only one pipe clogging sensor A is required, and the alarm system can be constructed with a simple configuration.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the rice huller equipped with the safety device of the present invention and the rice husk conveying pipe 3, Fig. 2 is a perspective view of the clogging sensor chamber 9, and Fig. 3 is a section of the clogging sensor A of the pipe. The sectional view and FIG. 4 are the overall layout of a hulling adjustment facility in which the hulling machine of the present invention is installed as the main device. A...Pipe clogging sensor, B...husker,
1...Limit switch, 2...Sensor board, 3
...Rice husk conveyance pipe, 4...Rotary valve,
5...Rice husk transport fan, 6...Rice husk chamber, 9...Clogging sensor chamber.

Claims (1)

[Scope of utility model registration request] In a configuration in which the rice husks wind-selected after being hulled by the huller are air-transported through the rice husk conveying pipe 3 by the discharge air from the rice husk conveying fan 5 and carried out into the rice husk chamber 6, at an intermediate part of the rice husk conveying pipe 3. A clogging sensor chamber 9 is provided that protrudes upward from the inner diameter portion of the rice husk conveying pipe 3, and a fixed wall 9a made of a vertical wall orthogonal to the conveying direction of the rice husk conveying pipe 3 is provided on the upstream side of the clogging sensor chamber 9. erected,
A safety device for a rice huller, characterized in that a pipe clogging sensor A is arranged on the fixed wall 9a.