JP3471937B2 - Air bubble removal device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble eliminator,
More specifically, the present invention relates to a bubble removing device that can efficiently and reliably remove bubbles generated in various liquid storage chambers such as a hydraulic chamber of a hydraulic diaphragm pump without causing liquid loss.

[0002]

2. Description of the Related Art Conventionally, bubbles generated in a liquid storage chamber such as a hydraulic pressure chamber of a hydraulic diaphragm pump have been extracted by a differential pressure type or forced type bubble extracting valve.

The differential pressure type bubble bleeding valve includes two valve seats provided in a flow path communicating with the liquid storage chamber, and a spherical valve movably housed between the two valve seats. To have. In the differential pressure type bubble bleeding valve, the spherical valve reciprocates between the two valve seats in accordance with a pressure change in the liquid storage chamber due to the reciprocating movement of the pump. By utilizing the reciprocating movement of the spherical valve, bubbles are removed when the spherical valve moves from one valve seat to the other valve seat. However, in the case of the differential pressure type bubble vent valve, since a small amount of liquid is discharged when the bubbles are discharged, a large amount of liquid in the liquid storage chamber is also discharged in proportion to the amount of gas to be discharged. Therefore, in a pump in which a minute discharge flow rate can be freely changed by finely adjusting the hydraulic pressure in the hydraulic chamber, the operating efficiency of the pump is reduced, and it becomes impossible to finely adjust the discharge flow rate. Problems arise. The forced bubble extraction valve also has the same problem as described above.

Under these circumstances, the inventor of the present invention has devised the following valve in order to solve the above problems (see Japanese Patent Laid-Open No. 6-63880). That is, FIG.
As shown in 0, the valve 30 is arranged in a downward opening portion 31 that flows into a liquid storage chamber (not shown) and coaxially with the downward opening portion 31.
A cylinder 33 having an upward opening 32 communicating with the liquid storage tank 34, a piston 36 having a notched recess 35 on its peripheral surface, and a motor 37 for rotating the piston 36.
And have. In this valve 30, the notch recess 35 in the piston 36 receives the bubble 40 rising from the downward opening 31. The motor 37 is driven to rotate the piston 36 to a position where the cutout recess 35 faces the upward opening 32. At this time,
The air bubbles 40 received in the cutout recesses 35 are buoyant to move from the cutout recesses 35 to the upward opening 32.
The air bubbles 40 were removed by utilizing the fact that they floated to the surface.

However, as a result of the inventor of the present invention further diligently examining the valve 30, the valve 30
Has been found to have the following improvements.
That is, in the valve 30, the notch recess 35
Since only the buoyancy force is used when removing the bubbles 40 received inside, the efficiency of bubble removal is poor, and there is a case where the bubbles 40 remain attached to the wall surface of the cutout recess 35 and are not removed. The point is that 40 cannot be reliably pulled out. Also in this case, there is a problem similar to the above.

The present invention has been made under the above circumstances, and an object thereof is to solve the above problems. Further, the present invention provides a bubble removing device capable of efficiently and reliably removing bubbles generated in various liquid storage chambers such as a hydraulic chamber of a hydraulic diaphragm pump without liquid loss. To aim.

[0007]

According to the present invention for solving the above-mentioned problems, a lower opening portion that circulates in a liquid storage chamber and an opening center axis different from the opening center axis of the lower opening portion are provided. A cylinder provided with an opening communicating with the liquid tank, a piston provided with a bubble reservoir on its peripheral surface, a position where the bubble reservoir matches the lower opening, and the bubble reservoir is located in the opening. It has a piston drive means for enabling the piston to reciprocate between a matching position and a liquid flow means for flowing a liquid through the bubble reservoir when the bubble reservoir faces the opening. It is a device for removing air bubbles.

The bubble removing device of the present invention will be described in detail below.

The bubble removing device of the present invention comprises a cylinder, a piston, a piston driving means, and a liquid circulating means.

The cylinder has a lower opening and an opening. The size, shape, structure and the like of the cylinder are not particularly limited and can be appropriately selected according to the purpose. The cylinder may not have an open end or may have an open end. When the cylinder does not have an open end, the piston is entirely contained in the cylinder, and when the cylinder has an open end, the piston can be partially exposed from the cylinder.

The lower opening portion communicates with the liquid storage chamber. The size, shape, structure and the like of the lower opening are not particularly limited and can be appropriately selected according to the size and the like of the cylinder.

If the liquid storage chamber has a function of storing liquid and produces bubbles,
The size, shape, structure, etc. are not particularly limited and can be appropriately selected according to the purpose. Specific examples of the liquid storage chamber include a pressurized liquid storage chamber, a normal pressure liquid storage chamber, a reduced pressure liquid storage chamber, and a variable pressure liquid storage chamber. Examples of the pressurized liquid storage chamber include a fermentation tank measurement chamber. As the atmospheric pressure liquid storage chamber, for example, a gas replacement supplementary counting amount chamber can be cited. Examples of the decompression liquid storage chamber include a decompression tank gas measuring chamber. Examples of the variable pressure liquid storage chamber include a hydraulic chamber of a hydraulic pump such as a hydraulic diaphragm pump. Among these, the hydraulic chamber of the hydraulic pump is preferable, and the hydraulic chamber of the hydraulic diaphragm type metering pump is particularly preferable. The bubbles are not particularly limited, and examples thereof include air bubbles and other gas bubbles.

The containing liquid to be contained in the liquid containing chamber can be appropriately selected according to the type of the liquid containing chamber, the purpose of use, and the like, and is not particularly limited, but, for example, water,
There may be mentioned oils and other inorganic or organic solvents. When the liquid storage chamber is the hydraulic chamber of the hydraulic pump, a preferable example of the storage liquid is oil having a small compressibility.

In the present invention, the lower opening may be designed to directly communicate with the liquid storage chamber,
Alternatively, an appropriately selected flow path may be formed, and the flow path may be designed to indirectly flow therethrough.

The lower opening is usually arranged above the liquid storage chamber. This is because the bubbles generated in the liquid storage chamber are guided to the lower opening by utilizing the buoyancy thereof. However, this is not the case when a means for forcibly guiding the bubbles to the lower opening is provided.

The opening has an opening center axis different from the opening center axis of the lower opening, and communicates with the liquid storage tank.
The size, shape, structure and the like of the opening are not particularly limited and can be appropriately selected according to the size and the like of the cylinder.

As the liquid storage tank, its size, shape,
The structure and the like are not particularly limited and can be appropriately selected according to the purpose.

The liquid to be stored in the liquid storage tank is not particularly limited and may be appropriately selected depending on the type of the liquid to be stored, the purpose, etc., but the composition of the liquid to be stored is kept constant. If necessary, it is preferable to use a liquid having the same composition as the contained liquid.

In the present invention, the opening may be designed so as to directly communicate with the liquid storage tank, or an appropriately selected bubble guiding path may be formed and indirectly communicated therewith. It may be designed to do.

The piston has a bubble accumulating portion formed on its peripheral surface. The bubble reservoir may have a function of receiving bubbles generated in the liquid storage chamber and floating from the lower opening, and there is no particular limitation on its size, shape, structure, or the like. Instead, it can be appropriately selected according to the purpose. The bubble collecting portion may be formed as, for example, a band-shaped groove portion that goes around the circumferential surface of the piston or a groove portion that circulates in a spiral shape. Further, a part of the circumferential surface of the piston is cut out. You may form as a recessed part.

If the piston driving means has a function of reciprocating the piston between the position where the bubble reservoir in the piston matches the lower opening and the position where the bubble matching the opening. There is no particular limitation, and it can be appropriately selected according to the purpose. For example, the following design can be made.

That is, the piston driving means can be designed by using a spring that is extended without being biased and an eccentric cam that is rotated by a motor. In particular,
In the cylinder having an open end, the spring and the piston are accommodated so as to abut each other,
An end surface of the piston exposed from the cylinder can be brought into contact with a small radius constant area on the cam surface of the eccentric cam. Alternatively, the spring and the piston are accommodated in the cylinder having no open end so that they are in contact with each other, and the piston is cycled on the end face of the cylinder where the piston is accommodated. A device that can be pressurized positively can be connected via a pressure transfer liquid.

The liquid circulating means is not particularly limited as long as it has a function of circulating the liquid through the bubble reservoir when the bubble reservoir faces the opening, and is appropriately selected according to the purpose. be able to. In the present invention, the reason why the liquid is caused to flow through the bubble reservoir is to forcibly remove the bubbles received in the bubble reservoir by the liquid flow.

As a mode of circulating the liquid through the bubble reservoir, for example, pressure feeding for circulating the liquid under pressure, circulation for circulating the liquid without pressurizing, or circulation while sucking the liquid by applying a suction pressure is performed. You can also send it out. In the case of the pressure feed or the delivery, since the liquid violently flows in the bubble reservoir,
Efficiently degassed.

In the present invention, the air bubbles received in the air bubble reservoir are not deaerated by utilizing the buoyancy thereof, but are forcibly deaerated by the liquid flow. Therefore, the opening is not directed upward. However, it may be opened in any direction.

As the liquid to be circulated in the bubble reservoir,
There is no particular limitation and it can be appropriately selected according to the purpose, but the above-mentioned stored liquid can be preferably used. When the liquid storage is used as the liquid, a tank for the liquid alone and other auxiliary equipment are not required, so that the device can be simplified.

As a specific example of the liquid circulating means, for example, a liquid pool portion provided at a tip end portion of the cylinder and a liquid pool portion communicating with the liquid pool portion and opening to the bubble pool portion facing the opening portion. A first aspect comprising a communication pipe having a liquid supply port, or a liquid reservoir provided at the tip of the cylinder, and communicating with the liquid reservoir and the bubble reservoir facing the opening. As described above, the second aspect including a communication groove formed on the inner surface of the cylinder is preferable.

When the first mode is adopted as the liquid circulating means, it is preferable to use the groove section as the bubble collecting section, and when the second mode is adopted, the concave section is used for the bubble collecting section. It is preferably used as a part.

[0029]

The air bubble removing device of the present invention operates as follows. That is, the bubble collecting portion provided on the peripheral surface of the piston receives the bubbles floating from the lower opening portion of the cylinder, which flows into the liquid storage chamber. Drive the piston drive means. The piston moves. At this time, from the position where the bubble reservoir matches the lower opening, the cylinder has an opening center axis different from the opening center axis of the lower opening and matches the opening communicating with the liquid storage tank. To the position, the piston moves. The bubble reservoir faces the opening. Liquid is circulated through the bubble reservoir by the liquid circulation means. The bubbles received in the bubble reservoir are degassed from the opening.

[0030]

【Example】

(First Embodiment) Hereinafter, the first embodiment of the bubble removing device of the present invention will be described.
Embodiments will be described in detail with reference to the drawings.
FIG. 1 is a schematic cross-sectional explanatory view showing a first embodiment of the bubble removing device of the present invention.

The bubble eliminator 1 shown in FIG.
5, a cylinder 2, a spring 9, a communication pipe 8 and a piston driving body 20 shown in FIG.

The piston 15 is a cylindrical member in this embodiment. The piston 15 is provided with a groove portion 17 that goes around the circumferential surface of the piston 15.

The cylinder 2 is a hollow cylinder having no open end. The cylinder 2 is provided with a lower opening 3 and an opening 4 on its peripheral surface.

The lower opening 3 communicates with a liquid storage chamber (not shown). The liquid storage chamber is a hydraulic chamber in a hydraulic diaphragm pump in this embodiment. The lower opening 3 is arranged above the hydraulic chamber.
This is because the bubbles 40 generated in the hydraulic chamber are guided to the lower opening 3 by utilizing the buoyancy thereof. In this embodiment, a bubble guiding path 3a and a bubble accommodating portion 3b are provided to guide the bubbles 40 generated in the hydraulic chamber to the lower opening 3. One end of the bubble guiding passage 3a communicates with the hydraulic chamber, and the other end communicates with the bubble accommodating portion 3b.
The bubble containing portion 3b is provided immediately below the lower opening 3. The bubble accommodating portion 3b includes the bubble guiding path 3a.
The bubbles 40 introduced from the above are accommodated, and the bubbles 40 are introduced from the lower opening 3 into the groove 17 of the piston 15.
Has the function of efficiently levitating.

The opening 4 has an opening center axis different from the opening center axis of the lower opening 3, and communicates with the liquid storage tank 10 provided above. The opening 4 is open upward in this embodiment. The liquid storage tank 10 stores a liquid storage 10a therein. The liquid storage 10a is the same as the liquid filled in the hydraulic chamber of the hydraulic diaphragm pump in this embodiment.

The spring 9 is a coil-shaped spring which is extended without being biased.

The piston 15 and the spring 9 are housed in the cylinder 2 while being in contact with each other.
At this time, one end of the piston 15 is attached to the cylinder 2
Abutting on the end face of the cylinder 2, one end of the spring 9 is
Abut on the end face of. The space formed at the tip of the cylinder 2, that is, the space defined by the piston 15 and accommodating the spring 9 is the liquid reservoir 5.

The communication pipe 8 is a pipe having a first opening and a second opening communicating with the liquid pool 5. The first opening is located on the piston 15 side. In this embodiment, the first opening is the liquid supply port 7. The liquid supply port 7 is arranged coaxially with the opening 4. In this embodiment, the liquid reservoir 5 and the communication pipe 8 function as the liquid flow means.

As shown in FIG. 2, the piston driving body 20 includes a sleeve 21 and a spring 2 in a state where the spring 21 is extended without being biased.
2, a piston 23, a connecting pipe 25, and an eccentric cam 26.

The sleeve 21 has a cylinder portion 21a.
Have. The cylinder portion 21a is the piston 2
3 and the spring 22 are accommodated in a state where they are in contact with each other. The connecting pipe 25 is connected to an end portion of the cylinder portion 21a on the side where the spring 22 is arranged. The other end of the connecting pipe 25 is connected to the end of the cylinder 2 on the side where the piston 15 is arranged.

On the peripheral surface of the piston 23, an O-ring 23a is mounted in order to improve the adhesion between the piston 23 and the cylinder portion 21a.

A space defined by the piston 23 and accommodating the spring 22 in the cylinder portion 21a is a hydraulic chamber 24. The hydraulic chamber 24 and the connecting pipe 25 are filled with oil having a low compression rate.

The spring 22 in the piston 23
The eccentric cam 26 is provided on the end surface opposite to the end surface contacting the
The small radius constant area on the cam surface of is contacted. The eccentric cam 26 is rotationally driven by a motor (not shown).

In this embodiment, the spring 9 and the piston driving body 20 function as the piston driving means.

When the bubble eliminator 1 is operated, the bubble eliminator 1 repeats a cycle consisting of a bubble receiving period, a piston advancing period, an evacuating period and a piston returning period. Figure 3-
5 is a partial cross-sectional schematic explanatory view for explaining a bubble receiving period, a piston forward moving period, and a degassing period in a cycle of the operation of the bubble removing device 1. FIG.

<Bubble Receiving Period> The bubble receiving period means a period in which the piston 15 does not press the spring 9 but only abuts on the spring 9 and the piston 15 does not move. That is, this means a period in which the small radius constant region on the cam surface of the eccentric cam 26 of the piston driving body 20 is in contact with the piston 23.

In the bubble receiving period, as shown in FIG. 3, the groove portion 17 of the piston 15 is located immediately above the lower opening portion 3 of the cylinder 2. The groove 17 is initially filled with the contained liquid contained in the liquid containing chamber. The groove portion 17 receives the bubble 40 generated in the liquid storage chamber, guided to the bubble storage portion 3b by the bubble guiding path 3a, and floating from the bubble storage portion 3b through the lower opening 3. During the bubble receiving period, the volume of the liquid pool 5 does not change and shows the maximum.

In the bubble receiving period, the generation rate of bubbles 40,
The length of the eccentric cam 26 can be adjusted by appropriately changing the length of the small radius constant region on the cam surface of the eccentric cam 26 according to the size of the groove 17.

<Piston forward movement period> The piston forward movement period means that the piston 15 continues to press the spring 9 until the groove portion 17 of the piston 15 coincides with the opening portion 4. This is the period during which 15 moves. That is, this means a period in which a spiral region of Archimedes, that is, a radius increasing region on the cam surface of the eccentric cam 26 of the piston driving body 20 is in contact with the piston 23.

In the piston forward movement period, as shown in FIG. 4, the groove portion 17 of the piston 15 moves on the inner peripheral surface of the cylinder 2. Since the groove portion 17 does not exist on the lower opening portion 3, the piston 15
When there is a peripheral surface of the groove 40,
There is no transfer to. The volume of the liquid pool portion 5 continuously decreases during the forward stroke of the piston. At this time, the stored liquid 10a existing in the liquid reservoir 5 is pushed out to the liquid storage tank 10 through the opening 4 while the opening 4 is opened, After the piston 4 is closed by the piston 15, it is compressed into the communication pipe 8.

During the piston forward stroke, the eccentric cam 26
By appropriately changing the length of the Archimedean spiral region, that is, the radius increasing region, on the cam surface of the, the length is appropriately adjusted.

<Degassing Period> The degassing period means a period in which the piston 15 is stationary while the spring 9 is being pressed. That is, this means a period in which a constant large / small radius region of the cam surface of the eccentric cam 26 of the piston driving body 20 is in contact with the piston 23.

In the deaeration period, as shown in FIG.
The groove portion 17 of the piston 15 is provided immediately below the opening portion 4 and the liquid supply port 7 of the communication pipe 8.
It is located directly above. As a result, the stored liquid 10a that has been compressed in the communication pipe 8 is pumped into the groove portion 17, and the bubbles 40 existing in the groove portion 17 become the opening portion 4.
After that, the liquid is rinsed into the liquid storage tank 10, and the groove 17 is filled with the liquid storage 10a containing no bubbles 40. At this time, since the stored liquid 10a and the stored liquid are the same liquid, there is no change in the composition of the liquid in the groove 17, and only the bubbles 40 are degassed. During the bubble receiving period, the volume of the liquid pool 5 does not change and shows a minimum.

During the degassing period, the length of the large radius constant region on the cam surface of the eccentric cam 26 is appropriately changed according to the amount of the bubbles 40 existing in the groove portion 17, the size of the groove portion 17 and the like. By doing so, the length is adjusted.

<Piston Backward Period> In the piston forward period, the pressing of the piston 15 against the spring 9 continues to decrease uniformly, and the groove portion 17 of the piston 15 continues.
Indicates a period in which the piston 15 moves to a position corresponding to the lower opening 3. That is, this means a period in which the radius decreasing region on the cam surface of the eccentric cam 26 of the piston driving body 20 is in contact with the piston 23.

In the piston return period, the groove portion 17 of the piston 15 moves on the inner peripheral surface of the cylinder 2. At the end of this returning period, the groove portion 17 filled with the liquid storage 10a faces the lower opening portion 3. As a result, only the bubbles 40 are degassed without damaging the contained liquid. The volume of the liquid pool 5 continuously increases during the piston return period.

During the piston return period, the eccentric cam 26
By appropriately changing the length of the radius decreasing region on the cam surface, the length is adjusted appropriately.

According to the bubble eliminator 1, bubbles generated in the hydraulic chamber of the hydraulic diaphragm pump can be efficiently and surely evacuated without any loss of liquid. Further, in the bubble eliminator 1, since the eccentric cam is used in the piston drive body 20, it is easy to adjust the length of the cycle in the operation.
Further, since equipment for rotating the piston 15 is not required, the device can be downsized and simplified. Further, since the liquid supply port 7 and the opening 4 are coaxially arranged and the bubbles 40 received in the groove 17 are pumped by the liquid storage 10a, degassing is surely performed in a short time. be able to.

(Second Embodiment) A second embodiment of the bubble removing device of the present invention will be described in detail below with reference to the drawings. FIG. 6 is a schematic cross-sectional explanatory view showing a second embodiment of the bubble removing device of the present invention.

The bubble eliminator 1 shown in FIG. 6 is the same as that of the bubble eliminator 1 of the first embodiment, except that the cylinder 2 is provided with a guide ball 12 for guiding the piston 15, and the peripheral surface of the piston 15 is provided. In the first embodiment, except that a spiral guide groove 19 that makes a half turn is provided, a recess 18 is provided instead of the groove portion 17 that makes a full turn, and a communication groove 11 is provided instead of the communication pipe 8. It is designed similarly to the bubble eliminator 1 of the above.

The guide sphere 12 is a sphere, and is fixed to the inner peripheral surface of the cylinder 2 so that half of it is exposed.

The guide groove 19 is designed so that the exposed spherical surface of the guide ball 12 can smoothly move on the surface thereof.

The recess 18 is a cylindrical hole. The position where the recess 18 is provided in the piston 15 is the circumferential surface of the piston 15 that faces the lower opening 3 when the piston 15 is arranged in the cylinder 2.

In the bubble eliminator 1, when the recess 18 of the piston 15 faces the lower opening 3, the guide ball 12 is located at one end of the guide groove 19. In the bubble eliminator 1, the guide ball 12 and the guide groove 19 are provided, and as a result, the piston 15 moves forward while making a half rotation in the cylinder 2, and a half rotation in the opposite direction to the forward movement. While returning.

The communication groove 11 is a space defined in the cylinder 2 by the piston 15, the liquid reservoir 5 and the opening 3. The length of the communication groove 11 increases in inverse proportion to the decrease in the volume of the liquid pool portion 5.

When the bubble eliminator 1 is operated, the bubble eliminator 1 repeats a cycle consisting of a bubble receiving period, a piston advancing period, an evacuating period and a piston returning period. Figure 7-
9A and 9B are schematic explanatory diagrams for explaining a bubble receiving period, a piston forward moving period, and a degassing period, respectively, in a cycle of the operation of the bubble removing device 1, and FIG. 9A is a partially cutaway schematic explanatory diagram thereof. And (b) is a partial cross-sectional schematic explanatory diagram thereof.

Each of these cycles is basically the same as each cycle in the bubble eliminator 1 of the first embodiment. Therefore, only the points different from the bubble removing device 1 of the first embodiment will be described below.

<Bubble Receiving Period> In the bubble receiving period, as shown in FIG. 7A, the recess 18 of the piston 15 faces the lower opening 3 of the cylinder 2, and the lower opening 3 is exposed. The air bubbles 40 that have risen through are received. Further, as shown in FIGS. 7A and 7B, the guide ball 12 is located at one end of the guide groove 19 in the bubble receiving period.

<Piston Forward Period> In the piston forward period, the recess 18 of the piston 15 moves on the inner peripheral surface of the cylinder 2 while making a half rotation. When the recess 18 does not face the lower opening 3, the bubbles 40 do not move into the recess 18.
In the piston forward movement period, the communication groove 11 is uniformly lengthened, and the liquid pool portion 5 is uniformly reduced. Figure 8
(A) and (b) have shown the state of the intermediate point of the said piston forward movement period. At this time, the guide ball 12 is located at the midpoint portion of the guide groove 19.

<Deaeration Period> In the deaeration period, as shown in FIG.
As shown in (a), the recess 18 of the piston 15 faces the opening 4. At this time, the stored liquid 10a pushed out from the liquid reservoir 5 is circulated into the recess 18 through the communication groove 11, and the bubbles 40 existing in the recess 18 pass through the opening 4 and the stored liquid. After being washed into the tank 10, the recess 18 is filled with the storage liquid 10a containing no bubbles 40. Further, as shown in FIGS. 9A and 9B, the guide ball 12 is located at the other end of the guide groove 19 in the deaeration period.

<Piston Return Period> In the piston return period, the recess 18 of the piston 15 moves on the inner peripheral surface of the cylinder 2 while rotating in the direction opposite to the piston forward period. The lower opening 3
When the concave portion 18 does not face the concave portion 18, the bubbles 40 do not move into the concave portion 18. In the piston return period, the communication groove 11 is uniformly shortened, and the liquid pool portion 5 is uniformly increased.

The bubble eliminator 1 of the second embodiment has the same effect in principle as the bubble eliminator 1 of the first embodiment. However, in the bubble eliminator 1 of the second embodiment, the guide ball 12 and the guide groove 19 are only provided without directly rotating the piston 15 using a drive source, and therefore the device is not provided. Can be miniaturized and simplified. Furthermore, the communication groove 11 does not take up space and does not complicate the device. Further, since the bubbles 40 received in the recess 18 are washed away by circulating the liquid storage 10a, it is possible to surely perform deaeration.

[0073]

According to the present invention, there is provided a bubble removing device capable of efficiently and reliably removing bubbles generated in various liquid storage chambers such as a hydraulic chamber of a hydraulic diaphragm pump without loss of liquid. be able to.

[Brief description of drawings]

FIG. 1 is a first view of a bubble removing device of the present invention.
It is a cross-sectional schematic explanatory drawing which shows the Example of.

FIG. 2 is a schematic cross-sectional explanatory view showing an example of piston driving means in the bubble removing device of the present invention.

FIG. 3 is a partial cross-sectional schematic explanatory view for explaining a bubble receiving period in an operation cycle of the bubble removing device shown in FIG.

4 is a partial cross-sectional schematic explanatory view for explaining a piston forward movement period in an operation cycle of the bubble removing device shown in FIG. 1. FIG.

5 is a schematic partial cross-sectional explanatory view for explaining a deaeration period in an operation cycle of the bubble removal device shown in FIG.

FIG. 6 is a second view of the bubble removing device of the present invention.
It is a cross-sectional schematic explanatory drawing which shows the Example of.

FIG. 7 is a schematic explanatory view for explaining a bubble receiving period in an operation cycle of the bubble removing device shown in FIG. 6, (a) is a partially cutaway schematic explanatory view thereof, and (b) is a schematic diagram thereof. ) Is the partial cross-sectional schematic explanatory drawing.

FIG. 8 is a schematic explanatory view for explaining a piston forward movement period in an operation cycle of the bubble removal device shown in FIG. 6, and FIG. 8A is a partially cutaway schematic explanatory view thereof, b)
FIG. 3 is a partial cross-sectional schematic explanatory view thereof.

FIG. 9 is a schematic explanatory view for explaining a deaeration period in an operation cycle of the bubble eliminator shown in FIG.
(A) is the partial notch schematic explanatory drawing, and (b) is the partial cross-section schematic explanatory drawing.

FIG. 10 is a schematic cross-sectional explanatory view showing an example of a conventional bubble vent valve.

[Explanation of symbols]

1 ... Bubble eliminator, 2 ... Cylinder, 3 ...
Lower opening part 3a ... Bubble guiding path, 3b ... Bubble containing part, 4 ... Opening part, 5 ... Liquid reservoir part, 6 ... Liquid supply means, 7 ... Liquid supply port , 8 ... Communication pipe, 9 ...
Spring, 10 ... liquid storage tank, 10a ... liquid storage, 11 ...
・ Communication groove, 12 ... Guide ball, 15 ... Piston, 1
6 ... Bubble pool, 17 ... Groove, 18 ... Recess, 19 ... Guide groove, 20 ... Piston driver, 2
1 ... Sleeve, 21a ... Cylinder part, 22 ...
..Spring, 23 ... Piston, 23a ... O-ring, 24 ... Hydraulic chamber, 25 ... Connection pipe, 26 ...
Eccentric cam, 30 ... valve, 31 ... downward opening, 3
2 ... upward opening, 33 ... cylinder, 34 ...
.... Reservoir tank, 35 ... Notched recess, 36 ... Piston, 37 ... Motor, 40 ... Bubble

Continuation of the front page (56) Reference JP-A-6-26465 (JP, A) JP-A-5-187360 (JP, A) JP-A-5-99151 (JP, A) Actually open 4-132474 (JP , U) Actual Kaihei 4-132475 (JP, U) Japanese Examined Sho 39-21714 (JP, B1) Japanese Examined Sho 41-390 (JP, B1) Actual Sho 39-27516 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04B 53/06 F04B 43/06

Claims (5)

(57) [Claims] 1. A cylinder having a lower opening portion that flows into the liquid storage chamber and an opening central axis that is different from the opening central axis of the lower opening portion and that has an opening portion that communicates with a liquid storage tank, and a bubble reservoir. And a piston that allows the piston to reciprocate between a position where the bubble reservoir matches the lower opening and a position where the bubble reservoir matches the opening. An air bubble removing device comprising: a driving means and a liquid circulating means for causing a liquid to flow through the bubble reservoir when the bubble reservoir faces the opening. 2. A cylinder having a lower opening communicating with the liquid storage chamber and an opening center axis different from the opening center axis of the lower opening and having an opening communicating with the liquid storage tank, and a peripheral surface. A piston provided with a groove portion that makes one round, and a piston drive means that allows the piston to reciprocate between a position where the groove portion matches the lower opening and a position where the groove portion matches the opening, A bubble removing device, comprising: a liquid flow unit that causes a liquid to flow through the groove when the groove faces the opening. 3. The communication means having a liquid reservoir provided at a tip of the cylinder and a liquid supply port communicating with the liquid reservoir and opening in the groove facing the opening. The bubble removing device according to claim 2, comprising a tube. 4. A cylinder having a lower opening communicating with the liquid storage chamber, an opening central axis different from the opening central axis of the lower opening, and having an opening communicating with the liquid storage tank, and a peripheral surface. A piston provided with a concave portion, a piston drive means capable of reciprocally rotating the piston between a position where the concave portion coincides with the lower opening and a position where the concave portion coincides with the opening, A bubble removing device, comprising: a liquid flow means for flowing a liquid through the recess when the recess faces the opening. 5. The liquid flow means is formed on the inner surface of the cylinder so as to communicate with the liquid reservoir provided at the tip of the cylinder and the liquid reservoir and the recess facing the opening. The bubble removing device according to claim 4, comprising a groove.