JPH07185493A - Storage container and cleaning device thereof - Google Patents

Abstract

PURPOSE:To enhance the efficiency of the cleaning work of a storage container by properly removing the material left in and internally bonded to the storage container. CONSTITUTION:A pulsating air introducing port 2 for introducing compressed pulsating air for cleaning a storage container generated by a pulsation generating means B into the main body 10 of the storage container 10 is provided to the peripheral wall part 14 of the main body 10 of the storage container at least at one place or more along the inner peripheral wall surface 14a of the main body 10 of the storage container 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage container such as a hopper used for storing and storing synthetic resin pellets and other materials, and a cleaning system for the storage container.

[0002]

2. Description of the Related Art When using a hopper dryer applied to a resin molding system, for example, when changing the type of molding resin, the total amount of the synthetic resin material remaining in the hopper dryer is discharged to the outside. Need to let. However, with this alone, it is not possible to properly remove and discharge the fragments and powder of the synthetic resin pellets adhering to the inner surface of the hopper dryer due to static electricity or the like.

In the past, however, it has been the actual situation that no means has been taken to efficiently and appropriately remove the deposits in the hopper dryer without manpower. Therefore, conventionally, for example, a worker uses an air gun to blow off the compressor air from the opening window (manhole) of the hopper dryer to remove the deposits. In addition, as other means, a mop is used to clean the inner surface of the hopper dryer, or washing is performed with water.

[0004]

However, since all the above-mentioned conventional means are manual cleaning operations,
The labor burden on the workers is heavy and the work efficiency is poor, which is a problem. And such a difficulty has arisen not only in the hopper dryer in the resin molding system, but also in the handling of other storage containers such as hoppers used for other purposes.

The present invention has been proposed in view of the above points, and it is possible to appropriately remove the material remaining and attached in the storage container without manual labor, and to enhance the efficiency of the cleaning operation. Has an aim.

[0006]

SUMMARY OF THE INVENTION The present invention according to claim 1 proposed to achieve the above object, is a compression for cleaning a storage container, which is generated by pulsation generating means, on a peripheral wall portion of a storage container main body. The storage container is provided with at least one pulsating gas introduction port for introducing the pulsating gas into the storage container body along the inner peripheral wall surface of the storage container body.

The present invention according to claim 2 is the above-mentioned claim 1.
In the above configuration, the pulsating gas introducing port is a storage container provided with a connecting means for detachably connecting a waveguide for supplying the compressed pulsating gas generated by the pulsating generation means.

The present invention according to claim 3 is a storage container,
Pulsating gas generating means for generating compressed pulsating gas, and on the peripheral wall portion of the storage container body of the storage container, the pulsating gas for introducing the compressed pulsating gas generated by the pulsation generating means into the storage container body. The storage container cleaning system is provided with at least one introduction port along the inner peripheral wall surface of the storage container body.

[0009]

In the storage container according to the present invention having the above-mentioned structure, the compressed pulsating gas (for example, compressed pulsating air) generated by the pulsation generating means is applied to the peripheral wall portion of the storage container main body. The compressed pulsating gas can be made to flow along the inner peripheral wall surface of the storage container main body by introducing the compressed pulsating gas into the storage container main body through the provided pulsating gas introduction port. It can work over a wide range of walls. Then, the compressed pulsating gas can peel off and remove the deposits on the inner peripheral wall surface of the storage container body.

According to the compressed pulsating gas whose pressure fluctuates at a constant time interval, unlike the case where a continuous constant pressure compressed gas (compressed air) is blown, the gas oscillating pressure of this compressed pulsating gas is stored inside the storage container body. It can be applied to various places on the peripheral surface and does not cause so-called blind spots. In addition, the compressed pulsating gas imparts a forcible vibration to the adhered matter, and this vibration can cause the adhered matter to be separated from the inner peripheral surface of the storage container body. The removal efficiency can be considerably improved. Therefore, the cleaning work as described above can be performed only by introducing the compressed pulsating gas into the main body of the storage container from the pulsating gas introducing port, so that the worker does not need to manually perform the cleaning. Further, such an action is also seen in the storage container cleaning system according to the present invention as set forth in claim 3, which has the same configuration as that of claim 1.

In the storage container according to the second aspect of the present invention, the waveguide is removed from the pulsating gas introduction port when it is not necessary to clean the inside of the storage container main body by using the compressed pulsating gas. Can be stored, the movement of the storage container body,
It will be convenient for other handling.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of a storage container cleaning system A according to the present invention, which is configured as a hopper dryer applied to a resin molding system, and FIG.
It is a line sectional view. This system A includes a hopper 1 for accommodating synthetic resin pellets (not shown) and compressed pulsating air as an example of compressed pulsating gas, and pulsation generation for introducing the compressed pulsating air into the hopper 1. The apparatus B is provided.

Here, the hopper 1 is a hopper body 10
The hopper body 10 has a cylindrical shape as a whole, and an opening / closing valve 12 is provided at a lower end of a conical portion 10a formed at a lower portion thereof. A discharge port 13 provided is provided. The hopper body 10 includes a hot air blower tube 22 for introducing heated dry air blown from the blower 20 and heated by the heater 21 into the hopper body 10, a diffuser cone 23 connected to the hot air blower tube 22, and the like. The synthetic resin pellets that are provided and housed in the hopper body 10 are heated and dried so that the synthetic resin pellets can be dried in a desired state. The used air used for such a drying process is sent to the dust collector 24 from the exhaust port 11a of the lid 11 to remove dusts and then released to the outside air, or to the blower 20 side again. It is configured to be reduced.

A pulsating air inlet 2 (corresponding to a pulsating gas inlet) for introducing compressed pulsating air generated by the pulsation generator B into the hopper body 10 is provided above the peripheral wall portion 14 of the hopper body 10. Has been established. The compressed pulsating air is supplied to the pulsating air introducing port 2 in a state where the waveguide 4 is connected to the short tube portion 3 which is continuously provided to the pulsating air introducing port 2. A pipe connector 9 of a type that can be attached / detached with a so-called one-touch operation is provided on the short pipe portion 3, and the waveguide 4 is connected to and released from the short pipe portion 3 easily. However, instead of this, for example, a bolt fixing type flange joint or the like may be used for connection. Further, as the waveguide 4, a flexible flexible hose or flexible tube is applied so that it can be handled easily. When the waveguide 4 is removed from the short pipe portion 3, it is considered that the pulsating air introduction port 2 can be appropriately closed by using an appropriate lid member or the like.

The pulsating air introducing port 2 is arranged at a position higher than the filling level LV of the synthetic resin pellets, and as shown in FIG. The compressed pulsating air which is set in the direction along the tangential direction of the inner peripheral wall surface 14a and is supplied from the pulsating air introduction port 2 into the hopper main body 10 is directed to the inner peripheral wall surface 14a of the hopper main body 10 as shown by the arrow in FIG. Considered to flow along.

As a concrete example of the pulsation generator B, a pulsation generator B comprising a blower 5 and a pulsation imparting device 6 as shown in FIG. The blower 5 in the pulsation generator B is a concept including all compressed air supply sources including an air compressor and a vacuum pump other than the blower. The pulsation imparting device 6 has two ports 62a and 62b.
A valve body 64 rotated by a motor M is provided in a cylindrical casing 63 having a. In the pulsation generator B, when the blower 5 connected to the port 62a continuously supplies compressed air into the casing 63, the valve body 64 is in the rotation angle state shown in FIG. 3 (a). The compressed air is discharged at the port 62b. On the other hand, when the valve body 64 has the rotation angle shown by the solid line in FIG. 3B, the valve body 64 blocks between the ports 62a and 62b, so that the discharge of the compressed air from the port 62b is stopped. It becomes a state.

In this pulsation generator B, the valve body 64 is continuously rotated, and the discharge of compressed air from the port 62b and the stop thereof are alternately repeated, whereby the port 6 is released.
Compressed pulsating air having a pressure waveform as shown in FIG. 4A is generated from 2b. Then, the compressed pulsating air is converted into the waveguide 4
Is introduced into the pulsating air introduction port 2 of the hopper 1. As this compressed pulsating air, for example, a low frequency band of about 10 Hz is adopted. Further, in the present invention, for example, FIG.
Compressed pulsating air having a pressure waveform as shown in (b) may be used.

Next, an example of use and operation of the system A having the above configuration will be described. First, when changing the type of the synthetic resin pellets stored in the hopper 1, the discharge port 1
Although the whole amount of the synthetic resin pellets is discharged from No. 3, it is not possible to remove the fragments and powders of the synthetic resin pellets attached to the inner peripheral wall surface 14a of the hopper body 10 due to static electricity or the like. Therefore, in such a case, the pulsation generator B is activated to move the compressed pulsating air into the pulsating air inlet 2
From the above, it may be introduced into the hopper body 10.

The compressed pulsating air introduced from the pulsating air inlet 2 flows along the inner peripheral wall surface 14a of the hopper body 10 as shown in FIG. Then, a swirling flow spirally swirling is formed, and the swirling flow advances from the upper part to the lower part of the hopper body 10 and reaches the conical part 10a. Then, the compressed pulsating air rises and is then exhausted from the exhaust port 11a.

The swirling flow of the compressed pulsating air as described above allows the compressed pulsating air to act on the entire inner peripheral wall surface 14a of the hopper body 10.
In particular, in the compressed pulsating air accompanied by the air vibration or the fluctuation of the air pressure, there is no fear that a position (dead zone) where the air vibration pressure does not reach occurs in a part of the hopper body 10, and the inner peripheral wall surface of the hopper body 10 The entire area of 14a can be cleaned substantially uniformly and appropriately. Furthermore, vibration is forcibly applied to the adhered matter that is strongly adhered, and the adhered matter is attached to the inner peripheral wall surface 14
Since the action of peeling from a is also obtained, the action of peeling / removing the adhered substance becomes excellent. Therefore, only by operating the pulsation generator B as described above, the inside of the hopper body 10 can be properly cleaned, and it is not necessary for the worker to clean the inside of the hopper body 10 by using a mop or the like.

The material removed by the compressed pulsating air is discharged from the discharge port 13. Further, at a position higher than the filling level LV of the synthetic resin pellets in the hopper 1, there is little possibility that debris or the like of the synthetic resin pellets is attached, and therefore, a pulsation provided at a position higher than the filling level LV. Even if the compressed pulsating air is not applied to the portion of the inner peripheral wall surface 14a located above the air inlet 2, no inconvenience occurs.

In the above embodiment, the pulsating air introduction port 2 is provided on the upper side of the hopper body 10, but the present invention is not limited to this. For example, as shown in FIG. 6, a pulsating air introduction port 2a is provided on the lower side of the hopper body 10 to generate a swirling flow of compressed pulsating air from the lower side of the hopper body 10 to the upper side thereof. It doesn't matter if you do cleaning. Depending on the type of hopper, it is not always necessary to clean the entire inner surface of the hopper, and in some cases it is only necessary to clean a part of the inner surface of the hopper.Therefore, the position of the pulsating air introduction port is appropriately determined according to the request. do it. Further, the number of pulsating air introduction ports is not limited to one, and a plurality of places may be provided.

FIGS. 7A and 7B are explanatory views showing a storage container cleaning system Aa according to another embodiment of the present invention. In this system Aa, pulsating air inlets 2 and 2a are provided at two positions above and below the hopper body 10A of the hopper 1A.
It is connected to the pulsation generator Ba via a and 4b.

Here, the pulsation generator Ba operates from the blower 5 to the port 6 when the valve body 64 rotated by the motor M of the pulsation imparting device 6A is at the rotation angle shown in FIG. 7 (a).
Since the compressed air supplied to the 2c is discharged from the port 62d, the pulsating air inlet 2 on the upper side is used to feed the hopper
Compressed air is supplied into A. Also at this time,
Since the ports 62f and 62e are connected to the intake side of the blower 5, the hopper body 1 is attached to the lower pulsating air inlet 2a.
Intake pressure (negative pressure) that inhales the air in 0A is generated.

On the other hand, the valve body 64 of the pulsation imparting device 6A
When the rotation angle is as shown in FIG. 7B, contrary to the above case, since the intake side of the blower 5 is connected to the upper pulsating air introducing port 2, a negative pressure is applied to the pulsating air introducing port 2. Occurs. Further, since the lower pulsating air introducing port 2a is connected to the exhaust side of the blower 5, compressed air is supplied from the pulsating air introducing port 2a.

After all, in this pulsation generator Ba, the valve body 6 is
The continuous rotation of 4 can generate compressed pulsating air in a state where discharge and intake of compressed air are alternately repeated in each of the ports 62d and 62f. As a result, when compressed pulsating air with air pressure fluctuations as shown in FIG. 8A is generated at the upper pulsating air inlet 2, as shown in FIG. 8B at the lower pulsating air inlet 2a. That is, the compressed pulsating air whose positive and negative phases are opposite to those of the upper pulsating air introducing port 2 side is generated.

Even with the system Aa as described above,
Since the compressed pulsating air can be made to flow along the inner peripheral wall surface 14a of the hopper body 10A, the interior of the hopper body 10 can be efficiently and appropriately cleaned as in the case shown in FIG. The compressed pulsating gas in the present invention means that the gas pressure alternates between positive pressure (higher than atmospheric pressure) and negative pressure (lower than atmospheric pressure), as shown in FIGS. 8 (a) and 8 (b). It is a concept including a mode of repeating the above.

In the present invention, various types of pulsation generating means can be used, but in the present invention, compressed pulsating air is generated by reciprocating a piston in a cylinder other than the above. You may Further, in such a case, the waveguides 4a and 4b
L = λ / 4 (λ is the wavelength of the compressed pulsating air and f = c / λ, where f is the frequency of the compressed pulsating air, and c is the propagation velocity of the sound wave. If the condition of () is set, the resonance action of the compressed pulsating air can be generated in the hopper body. With this resonance action, the introduction speed of the compressed air supplied from each pulsating air introduction port into the hopper main body can be maximized, and thus such a configuration is preferable because the effect of removing adhered substances can be further enhanced. .

In the present invention, the pulsation generator Bb shown in FIG. 9 is used.
As described above, a solenoid valve 33 is provided in the pipe portion 32 of the tank 31 which is connected to the air supply source 30 and stores compressed air, and the solenoid valve 33 is intermittently opened at, for example, a constant time interval (for example, 3 seconds). (Open the valve for 0.05 seconds at each interval)
You may use what was comprised in this way. Even with such a configuration, positive pressure compressed pulsating air can be supplied to the pulsating air inlet 2, and it is also possible to perform an appropriate cleaning process inside the hopper body 10.

Further, in the configuration shown in FIG. 9, the tank 3
If a gas other than air, for example, another gas such as an inert gas is introduced into 1, it is possible to generate a compressed pulsating gas of a gas other than air, which is introduced into the hopper body 10 to clean it. You can also do In the present invention, the compressed pulsating gas other than air may be used in this manner.

In addition, the storage container according to the present invention is not limited to a hopper such as a hopper dryer, but can be applied to all storage containers requiring cleaning treatment other than that, and of course, the kind of material accommodated in the storage container. Etc. are not limited.

[0032]

As is understood from the above description, the storage container according to the present invention according to claims 1 and 2 and claim 3 are provided.
According to the storage container cleaning system of the present invention described in (1), the compressed pulsating gas generated by the pulsation generating means is simply introduced from the pulsating gas introduction port of the storage container main body to remove the deposits in the storage container main body. Since it is unnecessary to perform the cleaning work manually by the worker, the special effect that the cleaning work efficiency can be improved can be obtained. In particular, in the present invention, rather than using a continuous compressed gas of constant pressure,
Since a compressed pulsating gas whose pressure changes is used and it is made to flow along the inner peripheral surface of the storage container body,
Compressed pulsating gas can be made to act over a wide range of the inner peripheral wall surface of the storage container body without creating a blind spot, and also, forcible vibration is applied to the adhered matter, resulting in excellent separation of the adhered matter. The removal action is obtained, with the advantage that the storage container can be cleaned in a fairly good finish.

According to the present invention as defined in claim 2,
When it is not necessary to clean the inside of the storage container main body, the waveguide can be removed from the pulsating gas inlet, so the waveguide and pulsation generating means are obstructive when moving the storage container main body or other handling. Can be resolved,
It is convenient.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an example of a storage container cleaning system according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

3A and 3B are sectional views showing an example of a pulsation generator.

4A and 4B are explanatory views showing an example of a pressure waveform of a compressed pulsating gas.

FIG. 5 is an explanatory diagram showing a state where compressed pulsating gas is introduced into the storage container.

FIG. 6 is an explanatory view showing another example of the storage container according to the present invention.

7A and 7B are explanatory views showing another example of the storage container cleaning system according to the present invention.

8A and 8B are explanatory views showing another example of the pressure waveform of the compressed pulsating gas.

FIG. 9 is an explanatory view showing another example of the storage container cleaning system according to the present invention.

[Explanation of symbols]

 1, 1A Hopper (storage container) 2, 2a Pulsating air inlet (pulsating gas inlet) 3 Short pipe 4, 4a, 4b Waveguide 5 Blower 6, 6A Pulsating device 10, 10A Hopper main body (storage container main body) 13 Discharge port 14 Peripheral wall part 14a Inner peripheral wall surface B, Ba, Bb Pulsation generator A, Aa Storage container cleaning system

Claims (3)

[Claims] 1. A pulsating gas inlet for introducing a compressed pulsating gas for cleaning a storage container, which is generated by a pulsation generating means, into the storage container body in a peripheral wall portion of the storage container body. A storage container, characterized in that it is provided in at least one or more locations along the line. 2. The connecting means for detachably connecting a waveguide for supplying the compressed pulsating gas generated by the pulsating means to the pulsating gas introducing port according to claim 1. A storage container characterized by: 3. A storage container and a pulsation generating means for generating compressed pulsating gas, and the compressed pulsating gas generated by said pulsating means is stored on the peripheral wall of the storage container body of said storage container. A cleaning system for a storage container, characterized in that at least one pulsating gas introducing port for introducing into the main body is provided along the inner peripheral wall surface of the storage container main body.