JPH043669Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention removes powder adhering to tanks, chutes, hoppers, silos, etc. during powder storage, transportation, crushing, dust collection, etc. by blowing compressed air. This invention relates to a device that prevents bridging, arching, and ratholes that impede functionality by brushing them off.

[Conventional technology]

A typical device that sprays compressed air to remove adhering powder is a system in which the discharge port of an accumulation tank is opened and closed by a piston installed inside.

This is a structure in which compressed air passes through a ventilation pipe in the center of the tank and causes a piston in the cylinder to reciprocate by opening and closing a control valve installed at the inlet of the tank, thereby opening and closing the discharge port. One of its features is that the compressed air travels straight from the inlet to the outlet, minimizing energy loss.

[Problem that the invention attempts to solve]

In the case of a piston system that discharges compressed air from a tank intermittently, there is dynamic friction caused by the piston reciprocating rapidly inside the cylinder, so wear-resistant materials are used for both parts to ensure durability. or a curing process is required.

Another problem is that the opening/closing mechanism of the discharge port is a factor that increases the cost of the device, such as the need for anti-corrosion treatment when the device is not used for a long period of time.

[Means and actions for solving problems]

The present invention is a means to solve the above-mentioned problems in the method of intermittently discharging compressed air from a tank.
The communication port in the partition wall of the storage chamber is opened and closed by a mushroom-shaped valve body, and the opening and closing operation is controlled by a dynamic pressure chamber in which a diaphragm that firmly holds the valve shaft communicates with the storage chamber to maintain equal pressure. Because it is configured to double as a bulkhead,
In an equal pressure state, the valve body closes the communication port, and at this time, the electromagnetic valve is de-energized.

When the electromagnetic valve is closed by energization, the communication inlet with the storage chamber is closed, and at the same time the hole in the dynamic pressure chamber is opened, and since the structure communicates with the outside air, the pressure rapidly decreases and the equal pressure balance is disrupted. The compressed air in the storage chamber pushes open the valve body and blows out.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A more detailed description of embodiments of the present invention will be given below with reference to the drawings.

FIG. 1 shows an explanatory diagram of the operation of each solenoid valve when the electromagnetic valve is in a de-energized state and in an energized state.

The storage chamber 2 and the working chamber 4 of the compressed air tank 1 are
It is separated by a partition wall 6 having a communication port 7 in the center, and consists of a circular opening 9 provided in the end wall 8 on the side of the working chamber 4 of the tank 1, and an end cover 10 having a circular recess of the same diameter inside. By clamping and tightening the flat diaphragm 11, the recess forms a dynamic pressure chamber 13 in which the diaphragm 11 also serves as a partition wall.

FIG. 1A shows a state in which the solenoid valve is de-energized.

There is an integrated solenoid valve 16 on the outside of the end cover 10, and the dynamic pressure chamber 13 is connected to the piping 14 through the solenoid valve 16 by opening the inlet hole 19 only when the current is not energized, that is, when the valve is open. It communicates with the storage chamber 2.

When compressed air enters the storage chamber 2 from the inlet 3 of the tank 1, it immediately fills the dynamic pressure chamber 13 through the above-mentioned path, so the storage chamber 2 and the dynamic pressure chamber 13 become equal pressure, and are fixed to the diaphragm 11. Valve shaft 20 held
The mushroom-shaped valve body 21 closes the communication port 7 through the mushroom-shaped valve body 21 .

When the solenoid valve 16 is energized, that is, closed, the state shown in FIG.
As shown in , the columnar valve body 17 inside the solenoid valve 16 is pulled up with a force greater than the biasing spring 18, closing the inlet hole 19 and simultaneously opening the outlet hole 15, so the dynamic pressure chamber 13 is communicated with the outside air and rapidly The pressure is reduced and the equal pressure balance with the storage chamber 2 is disrupted, and the compressed air in the storage chamber 2 pushes open the valve body 21 supported by the diaphragm 11 and the biasing spring 12 and blows out, passing through the working chamber 4 and exiting from the discharge port 5. gush.

After ejecting the required amount according to the situation, the solenoid valve 16 is de-energized to restore the state shown in Figure 1A.This series of operations is performed by opening and closing a switch. This can also be done automatically using a timer.

FIG. 2 shows an example in which the device of the present invention is attached to a dust collector.

Dust-containing air sucked in from an inlet 32 by a blower motor 31 in the dust collector 30 is filtered by a plurality of filters 33 and reaches a clean room 34, and is discharged from an outlet 35 after passing through the blower motor 31.

On the other hand, the dust captured by the filter 33 is shaken off by the vibration means, slides down the slope of the hopper 36, reaches the center of the bottom, and reaches the rotary valve 33.
Sent out at 8.

At this time, if the dust attached to the hopper 36 gradually increases, it will eventually form bridging on the upper part of the rotary valve 38, making it easy for the dust to fall off. Compressed air is intermittently sprayed through a nozzle 37 connected to the tank 1 according to the invention, and dust adhering to the hopper 36 is brushed off.

[Effect of idea]

According to the present invention, the nozzle opening/closing mechanism for blowing out compressed air is simpler than conventional ones, does not wear out because there are no sliding parts, and is therefore durable, and is made of inexpensive materials such as valves. Since the body-related parts may be made of synthetic resin, it is lightweight and does not rust even when not used for a long time.It is an excellent product that has many advantages such as cost reduction and the like.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the valve mechanism inside the tank based on the embodiment of the present invention. FIG. 1A shows the solenoid valve in a de-energized state, that is, it is open, and FIG. 1B shows the state that the solenoid valve is energized, that is, it is closed. shows. Figure 2 shows the first example as an example.
A partial cross-section of the one in the figure attached to a dust collector is shown. 1...tank, 2...accumulation chamber, 4...operating chamber,
5...Discharge port, 7...Communication port, 9...Opening port, 1
0...End cover, 11...Diaphragm, 12...Biasing spring, 13...Dynamic pressure chamber, 15...Exit hole, 16
... Solenoid valve, 17 ... Pillar valve body, 18 ... Biasing spring, 19 ... Inlet hole, 20 ... Valve stem, 21 ... Mushroom-shaped valve body, 30 ... Dust collector, 31 ... Blower motor , 32...Inlet, 33...Filter, 34
...Clean room, 35...Exit, 36...Hopper,
37... Nozzle, 38... Rotary valve.

Claims (1)

[Scope of utility model registration request] In a cylindrical compressed air tank that is closed at one end and has a circular open opening at the other end, an accumulation chamber that occupies most of the closed end side and the remaining working chamber are separated by a partition wall that has a communication opening in the center. A valve mechanism that opens and closes the communication port allows compressed air to instantly pass through the working chamber and blow out from the discharge port provided on the peripheral wall of the tank. A flat diaphragm is clamped and tightened by end caps having recesses of the same diameter, and a dynamic pressure chamber formed by the diaphragm and the recess is made to have an equal pressure by communicating with the storage chamber through piping, The communication port in the center of the partition wall is closed by a mushroom-shaped valve body via a valve shaft fixedly held in the center of a planar diaphragm, but a solenoid valve integrally mounted on the outside of the end cover is closed. Then, by arranging the holes, the dynamic pressure chamber communicates with the outside air, and at the same time closes the communication hole with the storage chamber, the equal pressure collapses when the dynamic pressure chamber opens, and the compressed air in the storage chamber flows through the diaphragm and the attachment chamber. This air-blowing type dust-off device features a valve mechanism that pushes open a valve body supported by a spring to blow air out.