JPH04253685A - Method and device for controlling discharge from flowable material tank - Google Patents

Abstract

PURPOSE:To improve discharging efficiency relating to a flowable material tank having a funnel-shaped discharge opening at its lower part by avoiding bridge forming phenomenon upon powder discharge and removing the resisting body such as valve body in a discharge opening. CONSTITUTION:In a flowable material discharge control device including a valve seat formed by fitting a freely vertically movable discharge cylinder 5 having a flange part 4 into the lower part of flowable material tank 3, a valve body 12 provided in the flowable material tank 3 above the discharge cylinder 5, an elastic membrane 7 provided along the inner wall of the discharge cylinder 5 and the inner wall of the flowable material tank 3 and fixedly attached to the flowable material tank 3 and the discharge cylinder 5 with an unattached part 8 remaining at its intermediate part and an air chamber 9 formed between the unattached part 8 and the inner wall of the flowable material tank 3, a flowable material discharge control method comrising introducing a pressure air through an air outlet opening 10 to expand the air chamber 9 and raise the discharge cylinder 5 in the direction of the arrow 16, thereby bringing the flange part 4 and the valve body 12 into contact to permit flowable material to be retained in the flowable material tank 3, removing the pressure air from the air chamber to lower the discharge cylinder 5, thereby discharging the flowable material therefrom, there being no bridge formation due to the jogging of the air chamber 9 taking place upon the flowable material discharge.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a method and apparatus for controlling discharge in a fluid tank which retains powder, liquid, etc. and discharges it.

0002

2. Description of the Related Art Conventionally, in order to control the discharge of contents in a fluid tank, a funnel-shaped discharge port was provided at the bottom of the fluid tank, and various valves were provided at the discharge port. Furthermore, in order to prevent the formation of crosslinks in powder, etc., a vibration means has been provided to prevent the formation of crosslinks.

0003

[Problems to be Solved by the Invention] In the conventional technology described above, since the discharge port is formed to be narrower than the inner diameter of the fluid tank, crosslinking is likely to occur directly above the discharge port, which particularly reduces the phenomenon of powder stagnation. was occurring. In order to remove the crosslinks, the crosslinked areas must be stirred with a rod or the like, which poses the problem of being time consuming. In addition, when various valves are installed on the outlet passage, the seals of the valves are damaged by the discharged materials, and the outlet valve itself becomes a resistor, reducing the efficiency of discharging the fluid. there were.

0004

[Means for Solving the Problems] However, the present invention solves the above problems by providing a movable valve seat and a valve body in a fluid tank and controlling the operation of the movable valve seat.

That is, the present invention is a discharge control method in a fluid tank, characterized in that the discharge of fluid is controlled by a deformable movable valve seat and a valve body at the bottom of the fluid tank. In addition, the amount of movement of the movable valve seat is regulated by fixing the valve body in a fluid tank or by connecting a telescopic air chamber to the movable valve seat and changing the amount of air flowing into the air chamber. This is a method for controlling emissions in a fluid tank.

[0006] Furthermore, in a fluid tank having a discharge port at the bottom, a discharge pipe that can be raised and lowered into the discharge port is provided together with an elevating means, the upper edge of the discharge pipe is used as a valve seat, and a valve seat is provided above the discharge pipe in the tank. This is a discharge control device for a fluid tank, characterized in that a valve body is installed in contact with the valve seat. Also,
One end of the elastic membrane is circumferentially fixed to the inner wall of the discharge tube, the other end of the elastic membrane is circumferentially fixed to the inner wall of the fluid tank, and the middle part of the elastic membrane is left unfixed, so that the fluid This is a discharge control device for a fluid tank, in which an air chamber is formed between a contact portion of the unfixed portion of the inner wall of the tank and the unbonded portion of the elastic membrane, and an air inlet/outlet is provided in the air chamber. Furthermore, the present invention is a discharge control device for a fluid tank in which the lower part of the valve body is spherical. Furthermore,
This is a discharge control device for a fluid tank in which the outer peripheral wall of the valve body or the valve body is formed of an elastic body.

[0007]

[Operation] The movable valve seat of the present invention is raised to come into contact with the valve body, sealing the inside of the fluid tank and retaining the contents in the fluid tank, and the movable valve seat is lowered to separate from the valve body. If so,
The contents can be discharged, and the amount of discharge can be controlled by adjusting the distance between the movable valve seat and the valve body.

[0008]

[Embodiment 1] An embodiment of the present invention will be described based on FIGS. 1 to 6.

A funnel-shaped discharge portion 2 is provided at the bottom of the cylindrical tank body 1 to form a fluid tank 3. A discharge tube 5 having a flange 4 is fitted into the lower part of the discharge section 2 so as to be movable up and down within the discharge section 2, thereby forming a valve seat. A ring-shaped packing 6 is provided between the inner wall of the discharge part 2 and the outer wall of the discharge tube 5.
6 is fitted.

Next, the inner wall of the fluid tank 3 and the discharge pipe 5
An elastic membrane 7 is disposed along the inner wall, and a lower part 7a of the elastic membrane 7
is fixed to the inner wall of the discharge tube 5, and the upper part 7 of the elastic membrane 7
b is fixed to the lower part of the inner wall of the tank body 1. Further, in the middle part of the elastic membrane 7, there is an unfixed part 8 that is not fixed to other parts.
is formed, and an air chamber 9 is formed between the unfixed portion 8 and the discharge portion 2.

[0011] An air inlet/outlet 10 is provided in a protruding manner on the outer wall of the discharge part 2 which comes into contact with the unfixed part 8 of the elastic membrane 7. The air inlet/outlet 10 is connected to a pressurized air exhaust/intake device (not shown).

Further, a support rod 11 is installed within the tank body 1, and an elliptical valve body 12 is fixed to the center of the support rod 11 to form a discharge control device 13. The valve body 12 is formed in such a position and shape that it can come into contact with the discharge pipe 5 at the highest position and close the upper edge of the discharge pipe 5.

Next, an example of use of the emission control device 13 of the present invention based on the above embodiment will be described.

In FIG. 5, when pressurized air is allowed to flow in the direction of arrow 14 from the air inlet/outlet 10 to the discharge control device 13 (FIG. 5(a)) in a state before air is introduced, the elastic membrane 7 is unbonded. Air is trapped between the inside of the section 8 and the inner wall of the discharge section 2, and the elastic membrane 7 expands inside the fluid tank 3 in the direction of arrow 15. As the elastic membrane 7 expands, the discharge tube 5 is pulled up and ascends in the direction of arrow 16 (Fig. 5(b)).
. When further air flows in, the discharge pipe 5 also rises, and the discharge pipe 5
The flange 4 contacts the valve body 12 via the elastic membrane 7, and the top of the discharge pipe 5 is closed by the valve body 12 (FIG. 5(c)).

Next, in this state, if a fluid such as powder or liquid is introduced into the fluid tank 3 from above the tank body 1, it can be retained in the tank. Furthermore, when discharging the fluid, pressurized air is removed from the air chamber 9, and accordingly, the discharge tube 5 descends, creating a gap between the valve body 12 and the discharge tube 5, and the fluid is discharged from the gap. It is discharged inside the cylinder 5 in the direction of arrow 17. The outflow of the pressurized air is stopped so that the downward movement of the discharge tube 5 is stopped at the position where the desired discharge amount is produced. Further, when discharging the residual fluid remaining in the tank, all the pressurized air is discharged from the air chamber 8, and the discharge tube 5 is lowered to the lowest position.

As described above, discharge control such as whether or not the fluid is discharged and the discharge amount is controlled by whether or not pressurized air flows into the air chamber 8 and the flow amount. Furthermore, in the above description, since the ejection tube 5 is supported by the elastic membrane 7 and the air chamber 8, it constantly moves slightly. Therefore, even when powder etc. are stored and discharged, there is no risk of crosslinking occurring above the discharge port. Furthermore, even if crosslinking occurs, the crosslinking can be removed by slowly introducing and removing air from the air chamber 8, as the discharge pipe 5 moves up and down in small steps.

In the above embodiment, an annular protruding line 20 is formed on the outer wall of the lower end 5a of the discharge tube 5, and an annular concave line 21 that fits with the annular protruding line 20 is formed on the upper end inner wall. , it can also be rotatably attached to the lower end 5 of the discharge tube 5 to form the discharge distribution section 22. Furthermore, the discharge distribution section 2
An operating protrusion 23 can also be provided protruding from the upper end of 2. In this case, a plurality of containers 24, 24 are arranged below the fluid tank 3, and the discharge distribution section 22 is rotated by holding the operation protrusion 23 to discharge the fluid into the desired container 24 (Figs. 6(a) and 6(b). )).

In the embodiment described above, the air chamber 8 was provided in the fluid tank 3, pressurized air was taken in and out of the air chamber 8, and the discharge tube 5 was raised and lowered. It is also possible to install a lifting means to raise and lower the discharge pipe 5.

In the embodiment described above, the lower part of the valve body 12 may be made of an elastic material. In this case, if the elastic membrane 7 is not made of an elastic material but is made of a soft material, the valve body 12 and the valve seat can be brought into close contact with each other.

Furthermore, in the embodiment described above, the lower part 7a of the elastic membrane 7 was fixed to the inner wall of the discharge tube 5, and the upper part 7b of the elastic membrane 7 was fixed to the lower inner wall of the tank body 1.
As shown in FIG. It can also be attached to. In this case, if at least the lower outer peripheral wall 10 of the valve body 10 is made of an elastic material, the raised discharge tube 5
A portion 4a of the upper surface of the flange portion 4 which is not covered with the elastic membrane 7 is in contact with the valve body 10 and can be sealed (FIG. 7). In the above,
The entire outer circumferential wall of the valve body 10 may be made of an elastic material, or the valve body itself may be made of an elastic material.

Furthermore, in the above embodiment, an air chamber 9 is formed by covering the elastic membrane 7 between the discharge tube 5 and the fluid tank 3,
Although the discharge tube 5 was raised and lowered by the inflow of pressurized air into the air chamber 9, the elastic membrane 7 was not provided, and evacuation means for raising and lowering the discharge tube 5 was provided on the lower outer wall of the discharge tube 5 to raise and lower the discharge tube 5. , emissions can also be controlled (not shown).

[0022]

[Embodiment 2] Another embodiment of the present invention will be described based on FIGS. 7 and 8.

A funnel-shaped discharge portion 32 is provided at the bottom of the cylindrical tank body 31 to form a fluid tank 33. The discharge section 3
A discharge tube 35 having a flange 34 at the lower part of the discharge portion 3
It is fitted so that it can move up and down within 2 to form a valve seat. Ring-shaped packings 36, 36 are fitted between the inner wall of the discharge portion 32 and the outer wall of the discharge tube 35.

Next, an elastic membrane 37 is provided along the inner wall of the fluid tank 33 and the inner wall of the discharge tube 35, and the lower part 37a of the elastic membrane 37 is fixed to the inner wall of the discharge tube 35. The upper part 37b is fixed to the lower part of the inner wall of the tank body 31. Further, an unattached portion 38 is formed in the middle portion of the elastic membrane 37, and an air chamber 39 is formed between the unattached portion 38 and the discharge portion 32.

An air inlet/outlet 40 and a valve 41 are provided in a protruding manner on the wall of the discharge portion 32 that comes into contact with the unattached portion 38 of the elastic membrane 37 . The air inlet/outlet 40 is a pressurized air exhaust/intake device (
(not shown).

A through hole 4 is formed in the center of the upper edge of the tank body 31.
It is closed with a partition plate 42 having a diameter of 2a. On the lower side of the partition plate 42,
A cylindrical filter 43 having a large number of fine holes 44, 44 is provided over the entire surface of the side wall 43a so as to protrude along the through hole 42a. A valve body 45 having a semi-elliptical lower part is fixed to the lower end of the cylindrical filter 43 . The valve body 45 is formed in such a position and shape that it can come into contact with the discharge tube 35 at the uppermost position and close the upper edge of the discharge tube 35 .

A liquid inlet 46 and a valve 47 are provided protruding from the side wall of the tank body 31 . Moreover, the upper side of the partition plate 42 is
a hollow hemispherical lid 4 having the same radius as the tank body 31;
Covered by 8. A filtrate discharge port 49 and a valve 50 are protruded from the lid 48 at a position that is not higher than the top 48a of the lid 48. Furthermore, a cleaning pressurized air supply port 51 and a valve 52 are protruded from the lid 48 to form an exhaust control device 53 (FIG. 8). The cleaning pressurized air supply port 51 is connected to a pressurized air supply device (not shown).

Next, a usage example will be described in which the discharge control device 53 of the present invention is applied to a liquid filtration device based on the above embodiment.

Discharge control such as whether or not to discharge the fluid and the amount of discharge is controlled by whether or not pressurized air flows into the air chamber 39 and the amount of the inflow, as in the first embodiment. That is, when pressurized air is allowed to flow out from the air inlet/outlet 39 to the discharge control device 53 in the direction of arrow 54, the unbonded portion 3 of the elastic membrane 37
Air is trapped between the inside of the tank 8 and the inner wall of the discharge part 32, and the elastic membrane 37 expands inside the tank. As the elastic membrane 37 expands, the discharge tube 35 is pulled up, and the discharge tube 35 is pulled up.
The flange 34 is at the uppermost position, and the top of the discharge pipe 35 is closed by a valve body 45. Also, when discharging fluids,
When pressurized air is removed from the air chamber 39, the discharge tube 35 descends, creating a gap between the valve body 45 and the discharge tube 35, and the fluid is discharged through the gap through the discharge tube 35. Further, by letting all the pressurized air flow out of the air chamber 39 and lowering the discharge tube 35 to the lowest position, all the residual fluid remaining in the fluid tank 33 can be discharged.

Pressurized air is filled into the air chamber 39 from the air inlet/outlet 40 of the discharge control device 53 in the direction of arrow 54, and the valve 41 is closed. At this time, the valve body 45 closes the upper end of the discharge tube 35. Further, the cleaning pressurized air supply port 5
The valve 52 of No. 1 is closed, and the valve 50 of the filtrate outlet 49 is open.

Next, the valve 47 is opened and the liquid inlet 46 is opened.
The liquid to be filtered is caused to flow into the fluid tank 33 in the direction of arrow 55. The liquid passes through the fine holes 44, 44 of the cylindrical filter side wall 43a in the direction of arrow 56, and passes through the cylindrical filter 43.
Go inside. At this time, the impurities 58 do not pass through the micropores 44 and adhere to the outer surface of the cylindrical filter side wall 43a. The filtrate from which impurities 58 have been removed rises, passes through the through hole 42a, rises in the direction of arrow 57, enters the lid 48, and is discharged from the filtrate outlet 49 in the direction of arrow 59 (FIG. 8).

Next, when the micropores 44 of the cylindrical filter 43 become clogged and the filtration ability decreases, the valve 47 of the liquid inlet 46 and the valve 50 of the filtrate outlet 49 are closed. The valve 52 of the air supply port 51 is opened to let pressurized air into the lid 48 in the direction of arrow 60. Immediately, the valve 41 of the air inlet/outlet 40 is opened, and pressurized air is removed from the air chamber 38. Then, the discharge pipe 35 descends, and the valve body 45
The liquid in the fluid tank 33 and the lid 48 is discharged through the discharge cylinder 35. At the same time, impurities 58 adhering to the cylindrical filter side wall 43a are also discharged from the discharge tube 35 in the direction of arrow 61 together with the liquid in the lid 48, and the clogging of the micropores 44 is eliminated (FIG. 9).

In the above embodiment, the cleaning pressurized air supply port 51 is used as a cleaning water supply port, and the cleaning water is discharged into the lid in exchange for pressurized air, and the side wall 4 of the cylindrical filter 43 is
Impurities 58 attached to 3a can also be washed away.

[0034]

Effects of the Invention According to the method of the present invention, the discharge is controlled by a deformable movable valve seat in the fluid tank. Since the discharge pipe is provided with a valve seat, the inside of the fluid tank can be stirred, which has the effect of avoiding the bridging phenomenon. Furthermore, since there is no resistor such as a valve inside the discharge tube, there is an effect of increasing the discharge efficiency of the fluid.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an emission control device according to an embodiment of the present invention with the valve seat and valve body open;

FIG. 2 is a plan view of an emission control device according to an embodiment of the present invention.

FIG. 3 is a longitudinal cross-sectional view of the discharge control device according to the embodiment of the present invention, with the valve seat and valve body closed.

FIG. 4: An enlarged sectional view of the air chamber of the emission control device according to the embodiment of this invention.

FIG. 5 is a vertical sectional view showing the operating state of the discharge control device according to the embodiment of the present invention, in which (a) is a diagram in which all of the fluid is being discharged, and (b) is a diagram in which the fluid is being discharged little by little. figure,(
c) shows the fluid discharge stopped.

[Fig. 6] A discharge control device equipped with a discharge distribution section according to an embodiment of the present invention, (a) is a perspective view, and (b) is an enlarged vertical sectional view of the discharge distribution section.

FIG. 7 is a vertical cross-sectional view of the discharge control device according to the embodiment of the present invention in which the valve seat and the valve body are closed, showing another state in which the elastic membrane is attached.

FIG. 8 is a vertical cross-sectional view of a discharge control device according to another embodiment of the present invention, with the valve seat and valve body closed.

FIG. 9 is a longitudinal cross-sectional view of an emission control device according to another embodiment of the present invention, with the valve seat and valve body open.

[Explanation of symbols]

2 Discharge section 3. Fluid tank 5 Ejection tube 7 Elastic membrane 8 Unfixed part 9 Air chamber 10 Air inlet/outlet 12 Valve body 13 Emission control device 32 Discharge section 33 Fluid tank 35 Ejection tube 37 Elastic membrane 38 Unfixed part 39 Air chamber 40 Air inlet/outlet 45 Valve body 53 Emission control device

Claims (7)

[Claims] [Claim 1] A discharge control method in a fluid tank, characterized in that the discharge of fluid is controlled by a deformable movable valve seat and a valve body at the bottom of the fluid tank. [Claim 2] Claim 1, wherein the valve body is fixed in the fluid tank.
Emission control method in the described fluid tank 3. The fluid tank according to claim 1, wherein a telescopic air chamber is connected to the movable valve seat, and the amount of movement of the movable valve seat is regulated by changing the amount of air flowing into the air chamber. Emission control method in 4. In a fluid tank having a discharge port at the bottom, a discharge pipe which can be raised and lowered into the discharge port is provided together with a lifting means, the upper edge of the discharge pipe is a valve seat, and the discharge pipe is arranged above the discharge pipe in the tank. A discharge control device for a fluid tank, characterized in that a valve body is installed in contact with the valve seat. 5. One end of the elastic membrane is circumferentially fixed to the inner wall of the discharge tube, the other end of the elastic membrane is circumferentially fixed to the inner wall of the fluid tank, and the middle part of the elastic membrane is fixed to the unfixed part. 5. The method according to claim 4, wherein an air chamber is formed between a contact portion of the unattached portion of the inner wall of the fluid tank and the unattached portion of the elastic membrane, and an air inlet/outlet is provided in the air chamber. Emission control device in fluid tank 6. The discharge control device for a fluid tank according to claim 4, wherein the lower part of the valve body is spherical. 7. The discharge control device for a fluid tank according to claim 4, wherein the outer peripheral wall of the valve body or the valve body is formed of an elastic body.