JPH053273Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention continuously removes powder adhering to tanks, chutes, hoppers, etc. in equipment related to powder storage, transportation, drying, crushing, dust collection, etc. The present invention relates to a vibrating device for removing adhered powder, which prevents bridging by applying a strong impact force to vibrating and shaking off powder.

[Conventional technology]

A typical device used as a device that automatically applies an impact force to excite and shake off adhering powder is a compression device that uses a magnetic piston as an impact medium to overcome the magnetic force via a solenoid valve. There are devices for supplying air and devices for supplying biasing compressed air to a piston of an impact medium by opening and closing a diaphragm via a solenoid valve, and the present invention relates to an improvement in the latter.

Fig. 2 is an explanatory diagram of the operation of the conventional mechanism to which the present invention relates, and Fig. C shows the electromagnetic on-off valve 33 in a closed state;
FIG. d shows a state in which the electromagnetic on-off valve 33 is open.

Inside the cylinder 21, the working chamber 23 of the piston 31
In the center of the partition wall 24 that divides the air chamber 22 into
A ventilation cylinder 25 whose lower part communicates with the working chamber 23 is provided, and its upper open end divides the air chamber 22 into a side having a compressed air inlet 26 and a side having an outlet 28 leading to an electromagnetic shut-off valve 33. So, cylinder 21
It is always closed by a diaphragm 29 which is sandwiched and fixed between the upper surface and the cover 27.

On the other hand, a piston 31 is pushed up by a spring 32 and is in close contact with the working chamber 23 in a state where the lower surface of the vent of the vent cylinder 25 is closed.

In Figure C, when compressed air is introduced from the air inlet 26, it penetrates into the entire air chamber 22 through the pressure equalization hole 30 provided in the diaphragm 29, so it is separated when the electronic on-off valve 33 is closed. The air chamber 22 maintains an equal pressure, and the diaphragm 29 is press-fitted to the upper open end of the vent cylinder 25 to prevent compressed air from entering, thereby maintaining the air inside the vent cylinder 25 at normal pressure.

[Problem that the invention attempts to solve]

In Figure d, when the electromagnetic on-off valve 33 is opened with the air chamber 22 filled with compressed air, the compressed air flows out from the outlet 28, so the diaphragm 2
The equilibrium of the pressures in both air chambers divided by 9 is broken, and the diaphragm 29 is pushed toward the outlet 28 and deformed in a curved manner, thereby opening the inlet of the ventilation cylinder 25 that had been blocked.

At this time, the compressed air enters the normal pressure vent cylinder 25, and in the initial stage there is a process of expansion and depressurization, so the biasing force against the piston 31 is smaller than that in the case where it is biased at full pressure from the initial stage. There is a problem in that as a result of a significant decrease, the impact force also decreases.

[Means and actions to solve the problem]

As a means to solve the above-mentioned problems, the present invention is based on removing the ventilation tube from the conventional mechanism and eliminating the normal pressure space, without changing the setting position of the partition wall and diaphragm.
A diaphragm is a flat plate opening/closing valve connected by a valve stem that opens and closes a vent in the center of the partition, so that when it opens, the compressed air reaches full pressure against the piston from the initial stage. This means that it can be effectively energized in a close state.

A more detailed explanation will be given below with reference to the drawings.

FIG. 1 is an explanatory diagram of the operation of the embodiment according to the present invention.
Figure a shows the electromagnetic on-off valve 15 in a closed state, and Fig. b shows the electromagnetic on-off valve 15 in an open state.

Inside the cylinder 1, an air chamber 2 and a piston working chamber 3
A vent hole 5 is provided in the center of the flat partition wall 4 which divides the air chamber 2 into a side having a compressed air inlet 6 and a side having a cover 7 having exhaust ports 8 and 8'. There is a diaphragm 9 that is sandwiched and fixed between the top surface of the cylinder 1 and the mounting surface of the cover 7, and the flat opening/closing valve 11 that opens and closes the vent 5 is connected to the diaphragm 9 by a valve shaft 12 and held in such a manner that it interlocks with the diaphragm 9. ing.

On the other hand, a piston 13 is pushed up by a spring 14 and is in close contact with the working chamber 3 in a state where the lower surface of the vent 5 is closed.

Further, an electromagnetic on-off valve 15 is integrally attached to the cover 7 so as to directly open and close the discharge port 8.

In Figure a, when compressed air is introduced from the air inlet 6, the pressure equalizing hole 1 provided in the diaphragm 9
0 and penetrates into the entire air chamber 2, so when the electromagnetic on-off valve 15 is closed, the divided air chamber 2
maintains an equal pressure, and the on-off valve 11 is pressed against the upper surface of the vent 5 to prevent compressed air from entering.

In Figure b, when the electromagnetic on-off valve 15 is opened with the air chamber 2 filled with compressed air, the compressed air flows out through the exhaust ports 8 and 8', so both air chambers are separated by the diaphragm 9. The equilibrium of the air pressure is broken, and the diaphragm 9 is pushed toward the outlet 8 and deformed, opening the on-off valve 11 via the valve shaft, and the compressed air enters through the vent 5 and hits the piston 1.
Press 3 to energize.

[Effect of idea]

When the compressed air passes through the vent 5, the partition wall 4
There is a normal pressure space with a thickness of , but it is small, so
There is almost no effect of pressure reduction due to expansion, and therefore the piston 13 can be biased in a state closer to the full pressure than in the initial stage.

In the case of this device, the on-off valve 11 and the valve stem 12 are integrally constructed of light metal or synthetic resin to reduce the weight. It can be used without the need for support against falling.

In addition, when the electromagnetic on-off valve is normally installed separated via an air pipe, the impact force decreases as a result of distance attenuation as the distance increases, and the piston operation is different from the operation of the electromagnetic on-off valve. Since there is a problem such as a time difference caused by a delay, the means to avoid this problem is to bring the valve part of the electromagnetic on-off valve as close to the cylinder as possible.

In the present invention, the electromagnetic on-off valve 15 is attached to the cylinder cover 7.
By creating an integral structure in which the cylinder 1 is directly assembled, the exhaust port 8 of the cylinder 1 is directly opened and closed, which not only avoids the above-mentioned problems, but also
Air pipes and their connecting parts can be omitted, contributing to cost reduction.

The present invention is superior to the conventional mechanism in that it incorporates the two improvements described above, allowing the pressure of compressed air to be used effectively without wasting it, and achieving maximum impact force. It is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the operation of the embodiment according to the present invention.
Figure 1 a is a cross-sectional view showing the electromagnetic on-off valve in the closed state, b is a cross-sectional view showing the open state, Fig. 2 is an explanatory diagram of the operation of a typical conventional mechanism, and Fig. 2 c is the electromagnetic on-off valve. d is a cross-sectional view showing the valve in the closed state, and d is a cross-sectional view showing the valve in the open state. 1...Cylinder, 2...Air chamber, 3...Working chamber, 5...Vent, 6...Compressed air inlet, 7...
Cover, 9...Diaphragm, 11...Opening/closing valve,
13... Piston, 15... Solenoid on-off valve, 21...
...Cylinder, 25...Vent cylinder, 27...Cover,
29...Diaphragm, 31...Piston, 33
...Solenoid on-off valve.

Claims (1)

[Scope of utility model registration request] The air chamber of the cylinder, which has an air chamber and a piston working chamber, is divided into a side with a compressed air inlet and a vent to the piston working chamber, and a side with a discharge port leading to the electromagnetic on-off valve. The diaphragm is provided with a small pressure-equalizing hole, and the diaphragm is operated to open and close via a solenoid valve to supply compressed air for urging to cause the piston to collide with the pressure-receiving pedestal intermittently. The cylinder cover and the electromagnetic on-off valve are integrally constructed, and the on-off valve that opens and closes the central vent of the flat bulkhead that divides the air chamber and the piston working chamber is connected to the diaphragm by a valve shaft and has an interlocking mechanism. A vibrating device for removing adhered powder, which is characterized by: