JPS583782Y2 - Reservoir hopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sump hopper that limits the rate of discharge of received material.

Conventionally, a sump hopper has a discharge gate with a fixed opening.
Discharge of the material to be supplied is restricted at a speed exceeding a predetermined speed.

However, since the predetermined speed is constant regardless of the amount stored, if the material to be supplied is intermittently supplied, there is a very high possibility that the discharge will not be carried out smoothly and will be carried out intermittently.

In addition, the amount supplied to the storage hopper is larger than the discharge speed, and even though the storage amount is increasing, it is restricted from discharging above a certain speed, so there is a possibility that the storage hopper will overflow. A large sump hopper was needed.

Therefore, the present invention was developed in view of the above-mentioned drawbacks, and provides a storage hopper that controls the opening degree of the discharge gate of the storage hopper and adjusts the discharge speed as the storage amount increases or decreases. .

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

The drawing shows a mass flow meter that measures the amount of raw materials supplied to a production line, etc., 1 is a receiving hopper that stores objects to be measured, and has a gate 3 whose bottom opening is opened and closed by a drive device 2 such as a cylinder. .

4 is a weighing hopper provided below the bottom opening of the receiving hopper 1, which has a weighing device 5 consisting of a load cell for weighing the weight of the object to be weighed supplied from the receiving hopper 1; It has a gate 7 whose bottom opening is opened and closed by a drive device 6 such as the like.

A control section 8 determines the state of the weighing hopper 4 based on the weight value of the weighing device 5, and controls opening and closing of the gate 3.7.

Reference numeral 9 denotes a cumulative addition unit which adds the weighed value of the weighing device 5 at a timing immediately before the start of discharging from the weighing hopper 4, and displays the cumulative value from the time when weighing starts.

10 is a storage hopper provided below the bottom opening of the weighing hopper 4, and a gate 11 and a gate 11 are provided at the bottom opening.
The opening and closing of each gate are individually controlled by a gate control section 13.

14 is a level meter provided on the inner wall surface of the reservoir hopper 10, which detects the storage level of the reservoir hopper 10 and controls the gate control section 13.

Next, the overall operation will be explained based on the operation of the control section 8.

Reference numeral 15 denotes a coincidence detection section which, when the weight value detected by the weighing device 5 matches the weight value preset in the weight setting section 16, immediately commands the drive device 2 to close the gate 3 and starts supplying the object to be weighed. temporarily stop.

The drive device 6 is commanded to open the gate 7 through the delay circuit 17 at the time when the coincidence detection section 15 detects the coincidence and the gate 3 is completely closed, and starts discharging the stored material in the weighing hopper 4. do.

At this time, the cumulative addition unit 9 cumulatively adds the weight value of the weighing device 50 immediately before the start of discharging in response to a signal commanding the opening of the gate 7.

When the near-zero detection unit 18 detects the completion of discharging the weighing hopper 4 from the weight value of the weighing device 5, it immediately commands the drive device 6 to close the gate T, and via the delay circuit 19, the gate 1 is completely closed. The driving device 2 is commanded to open the gate 3 at the time when the gate 3 is closed.

Objects to be weighed are intermittently received from the weighing hopper 4, and the storage amount is detected by the level meter 14 in the storage hopper 10. When the storage amount decreases to a predetermined level A or less, the next measurement is performed with the gate 11 open. It is determined that the discharge of the stored amount has been completed by the time of supply from the heavy hopper 4 and there is no trace of discharge, and the gate control unit 13 is commanded to close the gate 11.

When the gate 11 (7) is closed, the storage hopper 10
The discharge is performed through the gate 12 with a small opening, and the discharge speed is slowed down to suppress the rate of decrease in the stored amount.

Next, the supply from the weighing hopper 4 is performed, and when the storage amount in the reservoir hopper 10 exceeds the predetermined level A, it is determined that the reservoir hopper 10 will overflow when discharged from the gate 12, and the level meter 14 &l'-to control is performed. The unit 13 is ordered to open the gate 11.

When the gate 11 is opened, the discharge rate increases and the storage amount decrease rate also increases compared to when only the gate 12 is opened.

Therefore, the discharge from the storage hopper 10 is performed smoothly without leaving any traces, and since there is no overflow, the capacity of the storage hopper 10 can be reduced.

As explained above, according to the present invention, a level meter for detecting the amount of the object to be weighed stored in the storage hopper and a control section for controlling the opening degree of the discharge gate using the level meter are provided, and the amount of the stored object is increased or decreased. Since the system is configured to control the discharge speed based on the above information, even though the material is supplied intermittently, it can be discharged smoothly without any traces, and the capacity of the storage hopper can be reduced. can.

Additionally, when the storage amount in the sump hopper increases, it is possible to prevent overflow by restricting the input from the weighing hopper to the sump hopper. Capacity decreases.

However, in the present invention, the discharge capacity of the storage hopper itself is controlled and the input from the preceding weighing hopper is not restricted.
This does not cause a decrease in supply capacity as described above.

[Brief explanation of the drawing]

The drawing is a block diagram of a mass flow meter of an embodiment of a sump hopper according to the present invention. 4...Weighing hopper-10...Sump hopper 11.12...Gate, 13...
Gate control section, 14...Level meter.

Claims (1)

[Scope of utility model registration request] a sump hopper that intermittently receives the material to be supplied from the weighing hopper and limits the discharge speed of the received material; a level meter that detects the amount of the material stored in the sump hopper; 1. A storage hopper, comprising: a control section for controlling the opening degree of a discharge gate; and a control section for controlling the opening degree of a discharge gate, and the discharge speed is controlled as the storage amount increases or decreases.