JPS61134629A - Weighing method of hopper scale - Google Patents

Abstract

PURPOSE:To simplify the constitution of a gate of a reservoir hopper and to reduce the size of the reservoir hopper by providing the small sized reservoir hopper provided with the gate opening and closing freely to a discharge port upward a scale hopper. CONSTITUTION:At the time of weighing, first, a belt conveyor 14 is driven to supply material (m) to the reservoir hopper 12. Since the hopper 12 has the small volume, the material (m) is immediately overflowed and dropped into the scale hopper 10 from the hopper 12. Then, when a load cell 4 detects that the prescribed weighing is being attained, the conveyor 14 is stopped. Then, the gate 13 of the hopper 12 is opened and its discharge port 12a is opened to its full width. The size of the discharge port 12a is considerably small, the material (m) with the small flow rate is supplied to the hopper 10. Then, when the cell 4 detects that the amount of the material (m) within the hopper 10 attains the prescribed weighing, the gate 13 is closed and the gate 11 is opened. Then, the material (m) within the hopper 10 is supplied to a vessel of the lower part.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a weighing method for a hopper scale.

[Conventional technology and its problems]

In Figure 6, the scale hopper (IJ
The total weight of the L-scale hopper (13) is connected to one end of the L-scale hopper (13) and is connected to one end of the L-scale hopper (13), and the rotating force fI:c1-dossel (4) around the fulcrum (3) is detected. The discharge port (1a) of the scale hopper (1) is normally closed by a gate (5) that can be opened and closed in the direction shown by the arrow.

Scale hopper (above the IJ is a reservoir
6), the discharge port (6a) of which is normally closed to a gate (7) which can be opened and closed in the direction shown by the arrow, and stores the powdery material m. Although the gate (7) of the reservoir hora'-(6) is shown in a simplified manner in the explanation, it actually has a complicated configuration and opens in two stages. That is, in the first stage, the discharge port (6a) is fully opened and the scale is removed.
The material tn'fc is supplied to the hopper (17) at a large flow rate. In the second stage, the discharge port (6a)' is opened small and the material m is supplied to the scale hopper (IJ) at a small flow rate.

During weighing, the gate (5) is closed and the scale hopper is closed.
(13 is in the nitrogen state, and the gate (7) is fully opened.

A large flow rate from the sump hopper (6) causes the material layer to scale.
It is supplied to hopper +11. Scale hopper (I
When the total weight of J reaches near the predetermined weighing weight, for example 90 inches, this is detected by the load cell (4) and the gate (7) is switched to the second stage and moved to the closed position. Then, the opening of the discharge port (6a) is made smaller. Thereafter, the material m is supplied from the sump hopper (6) to the scale hopper (1) at a small flow rate. The load cell (
When the gate (4) is detected, the gate (7) completely closes the discharge port (6a).

In the above manner, material m having an accurate predetermined weight is supplied to the scale hopper (1), and the gate (5) is opened.
A container is placed below a), into which material m is discharged. When all the material m has been discharged from the scale hopper (υ), the gate (5) closes and waits for the next weighing operation.A given weight of material is replaced with the supplied container and the next container is placed on the scale. Hopper (located below IJ).

In the above manner, a predetermined weight of material m is supplied to the scale hopper (17K), after which the gate (5) is opened and weighed, and all the round materials m are supplied to the container below. Since the gate (7) of the yam hopper (6) is designed to open and close in two stages, its configuration is complicated and failures are likely to occur.Also, the storage hopper (6) also becomes large. There is a need.

[Purpose of the invention]

The present invention has been made in view of the above problems, and is based on a storage hopper oy-
The purpose of the present invention is to provide a weighing method for a scale/hopper that can be made into a small L-shape with a 4° configuration and a first, reservoir, and second par.

[hands]

The above object is to provide a scale hopper which is coupled to a weight sensing means, whose total weight is measured by the weight sensing means, and has a gate whose discharge port can be opened and closed; A gate is placed above that allows the discharge port to be opened and closed.

A hopper scale consisting of a sump hopper and a
(1) supplying material to the scale hopper and keeping the gates of the scale hopper and the scale hopper closed, and supplying material from the material supply means to the reservoir hopper to overflow; When the weight detecting means detects a weight close to This is achieved through the use of a hopper scale weighing method.

〔Example〕

Hereinafter, a weighing method using a hopper scale according to an embodiment of the present invention will be explained with reference to FIGS. 1 to 5. Among them, the parts corresponding to those in FIG. 6 are given the same reference numerals, and the explanation q is omitted.

In Figure 1, scale hopper 〇 (discharge port of I)
lQa) is provided with a gate (b) that can be opened and closed freely. A small reservoir hopper (2) is arranged above the scale hopper αQ, and a gate (to) is provided at its discharge port (12a) so as to be openable and closable. This gate (2) is different from the conventional one, and the discharge port (12a) is either fully opened or completely closed.

The discharge layer of the belt conveyor (b) is located above the storage hopper (2), and the belt conveyor (b) is driven and controlled by receiving signals from the load cell (4). .

At the time of weighing, the belt conveyor (b) is first driven to supply the material m to the storage hopper (L5) shown in FIG.

Since the volume of the sump hopper (2) is small, the material layer quickly overflows and is transferred from the sump hopper (b) to the scale hopper.
(It falls into the IQ. The amount of material supplied to the belt conveyor α is large, and the material layer in the scale hopper 4 increases rapidly.

To reach a predetermined weighing weight (for example, 90%)
When the a-do seventh wheel (4) detects this, the belt conveyor (b) is stopped. Therefore, there is no supply of material from the belt conveyor (b), and there is no overflow of material from the storage hopper (6). This awkward situation is shown in FIG. 3.

After the rotation of the belt conveyor α◆ is stopped, the storage hopper (
The gate side of the outlet (b) is opened as shown in Figure 4, and the outlet (b) is opened as shown in Figure 4.
12a) Fully open f. Since the size of the discharge port (12a) is sufficiently small, the material TrL is supplied to the scale hopper 〇〇 at a small flow rate. A load cell (4) indicates that the amount of material m in the scale hopper aQ has reached a predetermined weighing weight.
When detected, the sea urchin gate shown in Figure 5 is closed and the gate is opened. All of the material m in the scale hopper head is supplied to a container placed in the lower blade (not shown). When the scale hopper αq is empty (the load cell (4) may detect this), the gate (6) is closed and the next weighing operation is awaited.

In the above two ways, the material m of the predetermined weight can be accurately measured on the scale.
The weight is weighed in the hopper (113), and this embodiment has the following effects.

In other words, the gate (2) of the sump hopper (B) can be operated either fully open or fully closed, so the configuration can be much simpler than the conventional two-step gate, and it is less likely to malfunction. It can be drastically reduced.

In addition, since a large flow of material is supplied from the storage hopper (B) to the rainbow scale hopper QQ, it is necessary to downsize this hopper to the size of the conventional rainbow scale hopper. can do.

Although the embodiments of the present invention have been described above, the present invention is of course not limited thereto (and various modifications can be made based on the technical idea of the present invention).

For example, in the above embodiment, the material m is placed in the storage hopper (2).
A belt conveyor (
(b)) is used, but is not limited thereto; in example (1), a packet conveyor or a fluid conveyor may be used.

Although the horizontal rod (2), fulcrum (3), and CI-dossel (4) were used in the arrangement shown in the figure to measure the total weight of the scale hopper a0, other [Effects of the Invention] By applying the scale hopper weighing method of the present invention described above, it is possible to downsize the storage hopper. At the same time, the configuration of this gate can be simplified. can be used to reduce manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a scale hopper as an embodiment of the scale hopper weighing method of the present invention, and Figs. 2 to 5 are schematic side views for explaining the same action. , and FIG. 6 are schematic side views of a conventional scale hopper. In the figure, (4)・・・・−・・・・・・・・・・・・・・・・・・・a
- Docel (IQ・・・・・・・・・・・・・・・・・・
・・・Scale hopper (6) (to)・・・・・・
・・・・・・・・・Gate 4・・・・・・・・・・・・
・・・・・・・・・Storage hopper (b)………………
・・・Belt conveyor m・・・・・・・・・・・・・・・
・・・・・・・・・Material Ward Zeng-1 Machine One Section ≧ Ward■ Yuan Ward One Sailing

Claims (1)

[Claims] a scale hopper coupled to a weight sensing means, the total weight of which is measured by the weight sensing means, and having a gate capable of opening and closing an outlet; , a hopper scale comprising a sump hopper having a gate that can freely open and close a discharge port, the sump hopper and the gate of the scale hopper are closed, and the material is supplied from the material supply means to the sump hopper. Supplying the material to the scale hopper by overflowing, and when the weight detection means detects a weight close to a predetermined weight, stopping the material supply of the material supply means and opening the gate of the reservoir hopper, A method for weighing a hopper scale, characterized in that material is then supplied to the scale hopper.