JPH0385285A - Powder storing and weighing hopper - Google Patents

Abstract

PURPOSE:To correct any retentive state brought about by the bridge, arch and clogging of a powdery material in the main body of a hopper so as to permit the powdery material to be easily shaken off from the hopper. CONSTITUTION:When a hopper is excited by an exciter 3 into vibration, the vitration is transmitted from a projecting end 2 to the main body of the hopper 1 and a vibratory shaft 2 therein. This vibration is further transmitted to a plurality of vertical vibratory plates 4 provided on the vibratory shaft 2. When a powdery material is introduced into the hopper provided in its interior with such routes of vibratory transmission, the powdery material is excited directly by the vibratory shaft 2 and the vertical vibratory plates 4. For this reason, the cracking power of the powdery material is so strong that, even if it is brought in a retentive state such as caused by bridge, arch and clogging, this state is corrected to cause the fluidization to take place, resulting in the shaking-off of the powdery material adhered to the hopper and the removal of the retentive state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a storage/measuring hopper equipped with a device for removing powder or granules adhering to an inner wall.

[Conventional technology]

When transporting granular materials such as foundry sand, injection molding powder, grains, etc. to a predetermined working position, a hopper is provided along the transport route for storing and weighing the granular materials.

In the above hopper, if the powder or granules being conveyed contain moisture or have a high cohesive force, these particles may adhere to the inner wall of the hopper, causing so-called bridges, arches, clogging, and clinging. , phenomena such as rat holes occur.

When such adhesion of powder and granules occurs, the conventional methods for removing the adhering powder and granules from the inner wall of the hopper include an impact method that applies an impact to the side of the hopper, a vibration method that installs a pie break on the side of the hopper, and a vibration method that uses a pie break installed on the side of the hopper. Methods such as a stirring type in which a stirring device is installed in the inner lower part, and a pneumatic type in which compressed air is blown into the powder and granules have been adopted.

[Problem to be solved by the invention]

However, each of the above-mentioned conventional methods has the following problems.

(1) In the case of an impact type, it is necessary to adjust the location, strength, number of times, etc. of impact depending on the state of clogging, and it may not be possible to remove the adhered powder or granules simply by applying impact. In addition, the impact noise is loud and has a negative impact on the environment, and the applied impact may cause the sides of the hopper to become uneven.

(2) In the case of a vibrating type, the applied vibration may actually make the bridge stronger.

(In the case of a 3-ring stirring type, the structure is complicated, and depending on the shape of the hopper, the area that can be stirred becomes small, so it may not be effective.

(4) In the case of the pneumatic type, compressed air is blown directly into the powder and granules, so it is very effective in controlling the flow of the powder. However, it is difficult to select the position, number, shape, etc. of the nozzles, and the control device is difficult. Very expensive.

The conventional methods have the above-mentioned problems, and there is a desire for an apparatus that can efficiently remove adhering powder particles at low cost.

This invention was made in view of the current state of storage and weighing hoppers as described above, and its purpose is to provide a storage hopper that has a simple structure and is equipped with a device that can efficiently and completely remove adhering powder and granules.・Providing a weighing hopper.

[Means to solve the problem]

Therefore, in this invention, as a means for solving the above problems, a hopper body for storing and weighing powder and granular materials is provided, and one end of the hopper body is inserted into the hopper body at an appropriate height position near the lower opening of the hopper at the center of the cross section of the hopper body. The hopper is equipped with a vibration shaft provided so as to protrude through the inner wall, an exciter provided at the protruding end of the vibration shaft, and a plurality of sets of vertical vibration plates provided at appropriate intervals on the vibration shaft inside the hopper main body. The tank bottom of the hopper for storing and measuring powder and granular materials was adopted.

Furthermore, as another means for solving the above problems, we have developed a hopper body for storing and weighing powder and granules, and a vibrator installed at an appropriate height position near the lower opening of the hopper in the center of the cross section of the hopper body. Adopts a hopper structure for storing and weighing powder and granular materials, which is equipped with a shaft, multiple sets of vertical diaphragms installed at appropriate intervals on the vibration shaft, and a vibrator installed near the top of each vertical diaphragm. That's what I did.

[Effect]

In the hopper according to the first invention with the tank bottom as described above,
When vibration is applied by the vibrator, the vibration is transmitted from the protruding end to the hopper body and the vibration shaft within the hopper body, and the vibration is further transmitted to a plurality of sets of vertical vibration plates provided on the vibration shaft. When powder and granules are put into a hopper equipped with a tank bottom that transmits vibrations inside the hopper, vibrations are applied directly to the powder and granules from the vibration shaft and vertical diaphragm, which increases the cohesive force of the powder and granules. Even if the powder particles are in a stagnation state such as a bridge, an arch, or a blockage, the stagnation state is broken and this is fluidized, and the adhering powder particles are removed without leaving any residue behind. .

In the hopper according to the second invention, when each vibrator is started and vibration is applied, the vibration is transmitted to the vertical vibration plate and the vibration shaft, and the powder and granular material charged into the hopper is directly vibrated and Vibrations are also applied by vibrations transmitted to the hopper body via a vibration shaft or the like.

Therefore, as in the first invention, even if the granular material becomes in a stagnation state such as a bridge, arch, or clogging in the hopper, it can be brushed off without breaking it and leaving it behind.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the hopper for storing and measuring powder and granular materials according to the present invention includes a hopper body 1, a vibration shaft 2, a vibrator 3 provided on the protruding end 2' of the vibration shaft 2, and The vertical vibration plates 4 are provided at intervals.

As shown in the cross-sectional view of FIG. 2, the hopper body 1 is open at the top with an opening 1u and narrowed at the bottom with an opening 1°, like a normal hopper.

A vibration shaft 2 is inserted into the hopper main body 1 at an appropriate height position near the hopper's lower opening at the center of its cross section, and one end of the vibration shaft 2 is connected to the hopper front wall 1. is engaged by a chain 5, and is pulled and locked by a chain 6 in the cross-sectional direction. The vibration shaft 2 is extended by a shaft joint 7 at an appropriate position as shown in FIG. Further, a vibrator 3 is attached to this protruding end 2'.

The vibration shaft 2 inside the hopper body has multiple sets (
In this embodiment, three sets of vertical diaphragms 4 are attached,
Each vertical diaphragm 4 is suspended by a V-shaped chain 9.

A conveyor C is provided below the opening at the bottom of the hopper body 1 with an appropriate gap g, and the granular material discharged from the opening 1° is conveyed by this conveyor C.

In the powder storage and weighing hopper of this embodiment configured as described above, when the vibrator 3 is started and vibration is applied, the vibration is transmitted from the protruding end 2' of the vibration shaft 2 to the hopper body 1 and the vibration shaft. 2. The vibrations transmitted to the vibration shaft 2 are further transmitted to the vertical vibration plate 4, the chain 6.9, etc. For this reason, not only the hopper body 1 is vibrated against the powder and granules put into the hopper body 1, but also the hopper body 1
Vibrating shaft 2, vertical diaphragm 4, chain 6
．． Vibration is applied by 9 etc. Due to this direct vibration inside the hopper, it is possible to easily shake off stagnation such as bridges, arches, and clogging inside the hopper, even if the particles have a large cohesive force.

FIG. 4 is a central longitudinal cross-sectional view of a hopper for storing and measuring powder and granular materials according to another embodiment.

As shown in the figure, the hopper of this embodiment includes a hopper body 1, a vibration shaft 2, a vibrator 3, and a vertical vibration plate 4 to which the vibrator 3 is attached.

The structure of the hopper body 1 is the same as in the previous embodiment.

Unlike the previous embodiment, the vibrating shaft 2 is secured at both ends by chains 5.5 at a suitable height position near the lower opening of the hopper at the center of the cross section inside the hopper body. Further, in the transverse direction, as shown in FIG. 5, it is locked by a chain 6.6.

Furthermore, the vibration shaft 2 is connected to a required length by shaft couplings 7 (two are provided in this embodiment) at appropriate length positions.

As shown in the figure, the vibrator 3 is provided above each vertical diaphragm 4, and a plurality of vertical diaphragms 4 are attached to the vibration shaft 2 at appropriate intervals, and are connected by a V-shaped chain 9. It is suspended.

The power line to the vibrator 3 is connected to each vibrator 3.3...
The conduit 10 running above is suspended by appropriate means, and the conducting wire 11 inserted into the conduit 10 is branched and wired to each of the vibrators 3, 3, . . . .

Note that a conveyor C is similarly provided below the opening 1D below the hopper main body 1.

In the hopper of this second embodiment configured as described above, a plurality of sets of vibrator 3 are provided on a plurality of sets of vertical diaphragms 4.
vibrates when the power is turned on.

This vibration is transmitted from the vertical diaphragm 4.4 to the chain 6, S, and the vibration shaft 2, and is indirectly transmitted to the hopper body 1.
It also vibrates. The vibrations to the vertical diaphragms 4, 4, . . . , etc. are directly applied to the powder and granular material charged into the homper main body 1 through these.

Therefore, in this embodiment as well, it is possible to easily shake off the accumulation of powder or granular material inside the hopper by direct vibration inside the hopper.

〔effect〕

As described in detail above, the powder storage and granule storage according to the present invention
The weighing hopper is equipped with a vertical diaphragm on a oscillating shaft inserted into the hopper body, and the oscillating shaft and vertical diaphragm are vibrated by an exciter attached to the protruding end or the vertical diaphragm.
The vibration is transmitted not only to the hopper body but also to its internal vibration shaft.
Since the power is transmitted directly to the powder and granules through the vertical diaphragm, even if the powder or granules in the hopper body are in any stagnation state such as bridges, arches, or clogging, the stagnation state is broken and the powder can be easily shaken out. It can be dropped. In addition, it has a simple structure, is easy to operate and maintain, is inexpensive to manufacture, does not produce impact noise, and is environmentally friendly.

[Brief explanation of drawings]

Fig. 1 is a main vertical view of a hopper for storing and measuring powder and granular materials according to the present invention, Fig. 2 is a sectional view taken from line ■-■ in Fig. 1,
Figure 3 is a partial enlarged view of the vicinity of the part where the vibration shaft penetrates the hopper wall.
FIG. 4 is a main sectional view of a hopper of another embodiment, and FIG. 5 is a sectional view taken along line V--■ in FIG. 4. 1... Hopper body, 2... Vibration axis, 2'... Protruding end, 3... Vibrator, 4... Vertical Vibration plate, 5.6.9...
···chain.

Claims (2)

[Claims] (1) A hopper body for storing and weighing powder and granular materials,
A vibrating shaft is inserted through the center of the hopper main body at an appropriate height near the lower opening of the hopper, and one end thereof protrudes through the inner wall of the hopper, and an exciter is provided at the protruding end of the vibrating shaft. A hopper for storing and measuring powder and granular materials, characterized in that a vibration shaft inside the hopper body is equipped with a plurality of sets of vertical vibration plates spaced at appropriate intervals. (2) A hopper body for storing and weighing powder and granular materials,
A vibration shaft is installed at an appropriate height near the hopper's lower opening in the center of the cross section of the hopper body, multiple sets of vertical diaphragms are installed at appropriate intervals on this vibration axis, and near the top end of each vertical diaphragm. A hopper for storing and measuring powder and granular materials, characterized in that it is equipped with a vibrator.