JP3766458B2 - Pressure-reducing device equipped with a vibration mechanism - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a pressurizing / depressurizing device having a mechanism suitable for a member that vibrates in a pressurizing / depressurizing vessel, such as a pressurizing or depressurizing mixing device that stirs and mixes fluids in a pressurized or depressurized state.
[0002]
[Prior art]
As an apparatus for producing an emulsion by stirring and mixing fluids that are not mixed with each other, there is a Vibro mixer (trade name, for example, Japanese Patent Publication No. 2-15247, Japanese Patent Laid-Open No. 2-293035), which is used. By doing so, a desired emulsion can be obtained quickly. As shown in FIG. 6, the vibromixer includes a stirring body 11 in an impermeable casing 10, and the stirring body 11 vibrates in the axial direction. The stirring body 11 includes a drive shaft 11a and a spiral stirring blade 11b wound around the drive shaft 11a. When the stirrer 11 vibrates in the axial direction, turbulent flow is generated in the fluid in the casing 10, and formation and diffusion of a new interface is performed between different fluids. In the vibromixer, such new interface formation and diffusion are always performed, so that an emulsion can be continuously produced.
[0003]
[Problems to be solved by the invention]
In such a vibromixer, there is a demand for stirring and mixing fluids with pressure applied. In order to respond to this, simply increasing the internal pressure of the casing may damage the diaphragm partitioning the casing. This is the same when the pressure in the casing is reduced.
[0004]
The present invention has been made in view of the problems as described above, and its purpose is to apply vibration or mixing under reduced pressure, including a vibration type mixing apparatus capable of stirring and mixing without damaging members even when pressure is applied. An object of the present invention is to provide a pressure increasing / decreasing device having a mechanism that does not cause damage to a member even if it is vibrated at a pressure.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, in the pressurizing / depressurizing apparatus according to claim 1 of the present application, the pressurizing / depressurizing container whose inside is pressurized or depressurized, and the vibrating body that vibrates in the pressurizing / depressurizing container, In the pressurizing / depressurizing apparatus, the pressurizing / depressurizing container includes a flexible boundary film member that penetrates in a state where the vibrating body is in close contact, and a pressure corresponding to an internal pressure in the pressurizing / depressurizing container is applied to the boundary film. A pressurizing / decompressing chamber provided to the member is provided.
[0006]
2. The pressure increasing / decreasing apparatus according to claim 1 , further comprising: a pressure sensor for detecting a pressure in the pressure increasing / decreasing chamber; and a determinator for determining leakage of the boundary membrane member from a pressure change in the pressure increasing / decreasing chamber in the pressure increasing / decreasing stop state. And.
[0007]
In pressurization device according to claim 2 is the pressurization device according to claim 1 Symbol placement, the pressurization chamber is provided with a separate limiting membrane member having flexibility which penetrates in a state in which the vibrator is in close contact And another pressure-increasing / depressurizing chamber for applying a pressure corresponding to an internal pressure in the pressure-increasing / depressurizing chamber to the other boundary membrane member.
[0008]
In the pressure-intensifying device according to claim 3 , in the pressure-increasing device according to claim 1 or 2, the pressure-increasing container further includes a second boundary film member and the boundary film member. And a second pressure-reducing chamber for applying a pressure corresponding to the internal pressure in the pressure-reducing container.
[0009]
In a pressure-increasing / decreasing device according to a fourth aspect of the present invention, in the pressure-increasing / decreasing device according to the third aspect , the pressure P ₁ in the pressure-increasing / depressurizing vessel, the pressure P _{2 in} the pressure-increasing / decompressing chamber, The pressure increasing / decreasing device characterized in that the pressure P ₃ has the following relationship.
P ₂ > P ₁ > P ₃ or P ₃ > P ₁ > P ₂
[0010]
In addition to this, in the pressurization system of claim 4, wherein said vibrating body fifth invention decrease pressure mixing apparatus which is a stirrer for the sample pressure to the vibration mixing of the pressurization vessel As offered. Further, provided in the pressurization device according to the fifth invention, the pressurization mixing apparatus characterized by comprising a wound around by helical stirring blade to the drive shaft and the drive shaft as the sixth invention To do. Furthermore, in the pressurizing / depressurizing apparatus according to claim 3, the means for applying pressure to the pressurizing / depressurizing container, the pressurizing / depressurizing chamber, the separate pressurizing / depressurizing chamber, and the second pressurizing / depressurizing chamber are arbitrarily shared. the providing pressurization mixing device comprising a seventh invention.
[0011]
In general, a pressurizing apparatus including a vibration mechanism is provided with a flexible boundary film member such as a diaphragm in a pressurization container into which a sample or the like is press-fitted and the inside is pressurized. The vibration member is passed through in close contact. The reason why it must be passed in close contact is to prevent a decrease in the internal pressure of the pressurized container. This situation is the same in the case of a decompression device equipped with a vibration mechanism.
[0012]
Here, the boundary membrane member must be flexible because it needs to be able to move with the vibration of the vibration member. When it is vibrated, the boundary membrane member is likely to be damaged as compared with the case where it is not in the pressurized / depressurized state. However, in the apparatus according to the first aspect, since the pressure corresponding to the internal pressure in the pressure increasing / decreasing vessel is applied to the boundary membrane member by the pressure increasing / decreasing chamber, the pressure increasing / decreasing force applied from the pressure increasing / decreasing vessel to the boundary membrane member is neutralized. More specifically, when the inside of the pressurization / decompression vessel is pressurized, the pressurization force against the internal pressure is applied to the boundary membrane member by the pressurization / decompression chamber, and the inside of the pressurization / decompression vessel is depressurized. When the pressure is reduced, the pressure is reduced according to the internal pressure in the pressure increasing / decreasing chamber). For this reason, even if the vibrating body vibrates, the boundary film member is not damaged.
[0013]
Even if the boundary membrane member is damaged, the pressurizing / depressurizing device according to claim 1 can easily detect this. The pressure increasing / decreasing device according to claim 1 detects a leak in the boundary film member by monitoring a pressure change in the pressure increasing / decreasing chamber in a pressure increasing / decreasing stop state, and leaks when an abnormal pressure change occurs. Judge.
[0014]
As in the pressure increasing / decreasing device according to claim 2 , when another pressure increasing / decreasing chamber is provided for the pressure increasing / decreasing chamber directly connected to the pressure increasing / decreasing vessel, the boundary membrane member of the pressure increasing / decreasing vessel is damaged. Even when the sample leaks, it can be stopped at the portion of the pressurization / decompression chamber directly connected to the pressurization / decompression vessel.
[0015]
When the second pressure increasing / decreasing chamber is further provided in the pressure increasing / decreasing container as in the pressure increasing / decreasing apparatus of claim 3 , the second pressure increasing / decreasing chamber functions as a buffer chamber for the first pressure increasing / decreasing chamber. In this case, as in claim 4, the pressure P ₁ in the pressurization vessel, the pressure P ₂ of the first pressurizing and depressurizing chamber, the pressure P ₃ of the second pressurizing and depressurizing chamber following relationship Then, the pressure fluctuation due to the vibration of the vibrating body can be absorbed by the second pressure increasing / decreasing chamber, and damage to the boundary film member (for the first pressure increasing / decreasing chamber) due to the pressure fluctuation can be prevented.
[0016]
P ₂ > P ₁ > P ₃ or P ₃ > P ₁ > P ₂
This will be described in detail with reference to the drawings. In FIG. 1, the pressurizing chamber A is adjacent to the pressurizing container B with the boundary film L interposed therebetween. In addition to the pressurizing chamber A, the pressurizing vessel B is also provided with a second pressurizing chamber C with a boundary film Q interposed therebetween. The vibrating body M vibrates in the up-and-down direction (a and b directions). Since the boundary film L has flexibility, the vibrating body M can move in the vertical direction.
[0017]
Here, FIG. 1A shows a state of P ₂ , P ₃ > P ₁ . In this state, the boundary films L and Q are both bent toward the pressurized container B side. If the vibrating body M moves in the direction B in this state, a strong force is applied to the boundary film L in the direction B. This is due to the pressurizing force of the pressurizing chamber A. In any case, if the vibrating body M is moved in the direction of A in the state of P ₂ , P ₃ > P ₁ , it is applied to the boundary film L in the opposite direction. A strong force is applied and the boundary film L is damaged. This situation also applies to the case (P ₁ > P ₂ , P ₃ ) in FIG. 1C. In this case, when the vibrating body M is moved in the direction of B, the boundary is formed in the opposite direction (ie, the direction of A). A strong force is applied to the film L, and the boundary film L is damaged.
[0018]
On the other hand, in the state of P ₂ > P ₁ > P ₃ as shown in FIG. 1B, when the vibrating body M is moved in the direction of B, the direction is the direction in which the boundary film L is bent. For this reason, the boundary film L is not burdened. On the other hand, when the vibrating body M is moved in the direction of A, the boundary film Q is deflected in the direction of the pressurized container B by the amount that the boundary film L is moved in the direction of A and the pressure in the pressurized container B is changed. In this case, the burden on the boundary film L is reduced. As described above, when the pressure is set such that P ₂ > P ₁ > P ₃ , the boundary film L is not damaged even if the vibrating body M moves in either direction B or B. The situation is the same in the case of FIG. 1D (P ₃ > P ₁ > P ₂ ). In this case, the boundary film L is essentially burdened when the vibrating body M is moved in the direction B. However, when it is moved in the direction of B, the boundary film Q is bent by that amount, and the pressure change is compensated, and the burden on the boundary film L is reduced. The above principle is the same when the pressurized container B is a decompression container. Therefore, a general relationship such as P ₂ > P ₁ > P ₃ or P ₃ > P ₁ > P ₂ is established for the pressurizing and decompressing apparatus in general. It is enough.
[0019]
In such a pressure increasing / decreasing apparatus, the pressure increasing / decreasing chamber, the pressure increasing / decreasing chamber, the other pressure increasing / decreasing chamber, and the second pressure increasing / decreasing chamber may be combined in any combination with means for increasing or decreasing the pressure. If shared, the entire apparatus can be simplified.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The present invention can be applied to, for example, the following pressure mixing apparatus.
[0021]
In the first pressure mixing apparatus, in a mixing apparatus that includes a stirrer that vibrates in the longitudinal direction of the casing in a tubular casing and that mixes the object to be mixed in the casing by vibrating the stirrer. A boundary film member that shields the object to be mixed in the casing from the outside and partitions the mixing chamber in the casing, a pressurizing unit that pressurizes the mixing chamber, and a counter pressure corresponding to the internal pressure of the mixing chamber At least one pressurizing chamber for applying to the boundary membrane member, and the pressurizing chamber is disposed on the opposite side of the mixing chamber across the boundary membrane member.
[0022]
In such a first pressure mixing device, when the mixing chamber is pressurized, a counter pressure is applied to the pressure chamber disposed on the opposite side. As a result, a balance is achieved between the internal pressure in the mixing chamber and the counter pressure in the pressurizing chamber, and the stress applied to the boundary membrane member by the internal pressure in the mixing chamber is alleviated. As described above, according to the mixing device of the present invention, the mixing chamber can be pressurized while the state of the boundary membrane member is protected, and therefore stirring and mixing can be performed without any trouble even under pressure.
[0023]
In the second pressure mixing device, the pressure chambers are arranged in series in the first pressure mixing device. In the second pressure mixing device, two pressure chambers are arranged in series, so that different pressure fluids can be injected into the two pressure chambers. For this reason, for example, a fluid that does not interfere with mixing in the mixing chamber is pressed into the pressurizing chamber next to the mixing chamber, and the pressurizing chamber disposed through the other pressurizing chamber is inserted into the mixing chamber. A fluid that can be easily controlled in the pressure chamber but is difficult to mix in the mixing chamber can be pressed into the pressure chamber.
[0024]
The third pressure mixing device includes a buffer that absorbs pressure fluctuations in the pressure chamber caused by vibration of the stirring body in the first or second pressure mixing device, and the fourth pressure mixing device includes: The stirrer comprises a drive shaft and a spiral stirring blade wound around the drive shaft. The fifth pressurizing and mixing apparatus is the second pressurizing and mixing apparatus, and pressurizes the pressurizing chamber adjacent to the mixing chamber in the pressurizing chamber by a pressurizing unit that pressurizes the mixing chamber. .
[0025]
In such a pressure mixing device, the stirrer vibrates in the vertical direction, and this vibration causes a pressure variation peculiar to the pressure chamber. The pressure fluctuation can be absorbed and stable pressure control can be performed.
[0026]
When the stirrer is composed of a drive shaft and a spiral stirrer blade wound around the drive shaft (fourth pressure mixing device), a particularly good quality emulsion is obtained from the rule of thumb by the inventors. I know I can.
[0027]
In the fifth pressurizing and mixing apparatus, the pressure in the pressurizing chamber can be automatically set to the same pressure by pressurizing the pressurizing chamber with a pressurizing unit that pressurizes the mixing chamber. Thereby, the burden of the controller which performs pressure adjustment between the mixing chamber and the pressurizing chamber can be reduced.
[0028]
FIG. 2 is a block diagram showing a preferred embodiment of the first pressure mixing device. In addition, the same code | symbol is attached | subjected to the component similar to the past, and the description is abbreviate | omitted.
[0029]
In the pressure mixing apparatus according to this aspect, the mixture is injected from the raw material port 13, and the mixture is discharged from the generation port 15. Mixing is performed by the stirring body 11 vibrating in the vertical direction in the casing 10 as in the conventional case. The vibration source of the agitator 11 is a motor 16, and the upper portion of the drive shaft 11a is received by bearings 17a and 17b, and a diaphragm 18 is provided in the middle. The diaphragm 18 corresponds to a boundary membrane member described in the claims, and plays a role of preventing the generated mixture or the like from reaching the drive mechanism portion of the apparatus. The presence of the diaphragm 18 forms a mixing chamber 19 in the casing 10 that is clearly separated from the drive mechanism of the apparatus.
[0030]
The pressurizing and mixing apparatus according to this aspect is provided with a first pump 20 and a second pump 21 for pressurization. These are controlled by the controller 23 together with the valves 24-26. The first pump is for press-fitting the material to be mixed into the mixing chamber 19, and pressurization is performed when the valve 26 is opened with the valve 25 closed. On the other hand, the pressurization of the pressurizing chamber 27 formed between the diaphragm 18 and the bearing 13 b is performed by the pump 21. Press-fitting of the mixture to the mixing chamber 19 is conducted more pressed pump 2 0. A buffer 28 is connected to the pipe of the pump 21 that pressurizes the pressurizing chamber 27.
[0031]
The diaphragm 18 is a flexible membrane itself, and simply expands upward when only the pressure in the mixing chamber 19 is increased. If the applied pressure is large, it may be possible to burst. Moreover, even when it does not lead to destruction, it is conceivable that the lifetime is shortened by repeating the pressurization. However, in the pressurizing and mixing apparatus according to this aspect, the inside of the pressurizing chamber 27 is pressurized against the pressurization of the mixing chamber 19 and the counterpressure is applied thereto, so that the balance between them is obtained and the diaphragm 18 is applied. Such stress can be relieved.
[0032]
In this embodiment, a drain hole 31 for discharging fluid leaking from the bearing 17b is provided. The pressure in the mixing chamber 19 is detected by the first pressure gauge 29, and the pressure in the pressurizing chamber 27 is detected by the pressure gauge 30. These pressure changes are monitored by the controller 23, and the pumps 20 and 21 are controlled so that no pressure difference occurs between the mixing chamber 19 and the pressurizing chamber 27. Furthermore, regarding the buffer 28, a syringe-type buffer is employed in this embodiment.
[0033]
FIG. 3 is a block diagram showing a functional configuration of the pressure mixing apparatus according to the second embodiment. In addition, the same code | symbol is attached | subjected to the component similar to a 1st aspect, and the description is abbreviate | omitted.
[0034]
What is characteristic in the second aspect is that two pressurizing chambers are provided and they are arranged in series. In this embodiment, pressurizing chambers 27a and 27b are provided in series, and pumps 21a and 21b, valves 24a and 24b, and pressure gauges 30a and 30b are provided respectively. Note that the buffer 28 is provided only for the pressurizing chamber 27b because the diaphragm 18b also expands upward when the diaphragm 18a expands upward. This is because it is considered that hardly occurs in the pressure chamber 27a.
[0035]
In such a pressurizing and mixing apparatus according to the second aspect, pressurization can be performed with different fluids in the pressurizing chambers 27a and 27b. For example, it is possible to pressurize the pressurizing chamber 27a with pressurized air and pressurize the pressurizing chamber 27b with hydraulic pressure. In this case, even when leakage occurs in the diaphragm 18b, there is no fear that the press-fitting oil is mixed into the mixing chamber 19, and there is an advantage that the quality of the obtained mixture is not impaired. Further, when pressurized air is injected into the pressurizing chamber 27a, a container with a large capacity is sufficient for the buffer 28.
[0036]
FIG. 4 is a block diagram showing a functional configuration of the pressure mixing apparatus according to the third embodiment. In addition, the same code | symbol is attached | subjected to the component similar to the 1st thru | or 2nd aspect, and the description is abbreviate | omitted.
[0037]
In the third aspect, the joint 41 is attached to the generation port 15. The joint 41 has a pressure chamber 41a into which pressurized air is sent and a diaphragm 41b. When the joint 41 is attached to the generation port 15, the mixture is taken out from the outlet 41c. In the 3rd mode, since it has pressure chamber 41a which counters pressure in casing 10, it corresponds to what provided the 2nd pressurization room further to the pressurization container. The pressurized air to the pressure chamber 41a is sent from the pump 42a through the valve 42b. The pressure in the pressure chamber 41a is tracked by a pressure gauge 42c. A switch 42d for adjusting the opening / closing of the valve 42b is controlled by the controller 44.
[0038]
In the third aspect, pressurized air is fed into the pressurizing chambers 27a and 27b provided in series with the drive shaft 11a (or the casing 10) by the common pump 46a. Among these, a valve 46b is provided in a pipe for sending pressurized air to the pressurizing chamber 27a, and its opening / closing is controlled by a switch 46d, and the pressure in the pressurizing chamber 27a is tracked by a pressure gauge 46c.
[0039]
The press-fitting of the raw material into the raw material port 13 is performed by a pump 45a through a valve 45b, and the opening and closing of the valve 45b is adjusted by a switch 45d. On the other hand, a valve 47b is also attached to the outlet 41c, and its opening / closing is adjusted by a switch 47d. A pressure gauge 47c attached upstream of the valve 47b can measure the pressure in the casing 10 (pressurized container).
[0040]
The controller 44 is connected to the pressure gauges 42c, 46c and 47c, and the switches 42d, 45d, 46d and 47d, and monitors data obtained from these pressure gauges and controls the switches corresponding to them.
[0041]
In the third mode, the damage to the diaphragms 18a to 18b can be detected by tracking the pressure in the pressurizing chamber 27a with the pressure gauge 46c with the valve 46b closed. That is, as shown in FIG. 5, the pressure in the pressurizing chamber 27a is reduced when the valve 46b is closed (P _a → P _b ), but the pressure drop is relatively gradual when the diaphragm is normal. ((A) in FIG. 5). On the other hand, when both or one of the diaphragms is damaged, the pressure in the pressurizing chamber 27a rapidly decreases. In this case, if it is not so much damaged, it will be reduced more rapidly than in the normal case ((b) in FIG. 5), but if the damage is significant, it will drop rather rapidly (in FIG. 5). (C)). The controller 44 detects the breakage of the diaphragm by looking at these pressure changes.
[0042]
In the third mode, the pressure P ₁ in the casing 10 (that is, the mixing chamber 19), the pressure P ₂ in the pressurizing chamber 27a, and the pressure P ₃ in the pressure chamber 41a are in the following relationship. To do.
[0043]
P ₂ > P ₁ > P ₃ or P ₃ > P ₁ > P ₂
When P ₁ , P ₂ , and P ₃ are in such a relationship, the pressure change in the mixing chamber 19 due to the vibration of the stirrer 11 can be absorbed by the pressurizing chamber 27a, and the diaphragm 18a can be prevented from being damaged by the pressure change.
[0044]
Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, any fluid can be used to press fit into the pressurizing chamber. In the above embodiment, the pressure device is described as a pressure mixing device. However, the pressure device is not limited to the pressure mixing device, and any pressure device having a vibration mechanism (for example, Japanese Patent Laid-Open No. Hei 5- The present invention can be applied to a hollow particle production apparatus disclosed in Japanese Patent No. 228359 and a filtration apparatus disclosed in JP-A-6-2442836. In this case, the pressure vessel is not limited to a cylindrical casing, and any vessel that functions as a pressure vessel can be used.
[0045]
Although the embodiment has been described with respect to the pressurizing device, when applied to the depressurizing device, basically only the bending direction of the diaphragm 18a is reversed, and the present invention is not limited to the pressurizing device. Obviously, the same applies to the device. For example, in the case of a pressure reducing device, when a change in pressure is tracked and a diaphragm breakage is detected, a rapid increase in pressure may be observed.
[0046]
In any case, it should be understood that the pressure-reducing device according to the embodiment of the present invention can be easily modified within the scope of matters obvious to those skilled in the art.
[0047]
【The invention's effect】
As described above, the pressurizing / depressurizing apparatus according to the present invention can perform pressurizing / depressurizing without breaking the members of the apparatus or shortening the service life.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a relationship between a pressure P ₁ in a pressure vessel, a pressure P ₂ in a first pressure chamber, a pressure P ₃ in a second pressure chamber, and a change in a boundary film member. It is.
FIG. 2 is a block diagram showing a functional configuration of the pressure mixing apparatus according to the first embodiment.
FIG. 3 is a block diagram showing a functional configuration of a pressure mixing apparatus according to a second embodiment.
FIG. 4 is a block diagram showing a functional configuration of a pressure mixing apparatus according to a third embodiment.
FIG. 5 is a view for explaining a pressure change in the pressurizing chamber 27a in a state in which the valve 46b is closed.
FIG. 6 is a block diagram showing a functional configuration of a conventional mixing device (vibromixer).
[Explanation of symbols]
10 casing, 11 stirring body, 11a drive shaft, 11b stirring blade, 16 motor, 17a, 17b bearing, 18, 18a, 18b, 41b diaphragm, 19 mixing chamber, 20, 21, 21a, 21b, 42a, 45a, 46a pump , 23, 44 Controller, 27, 27a, 27b Pressure chamber, 28 Buffer, 29, 29a, 29b, 42c, 46c, 47c Pressure gauge 41 Joint, 41a Pressure chamber.

Claims (4)

In a pressure increasing / decreasing device comprising a pressure increasing / decreasing container whose inside is pressurized or depressurized, and a vibrating body that vibrates in the pressure increasing / decreasing container
The pressurizing / depressurizing container includes a flexible boundary film member that penetrates in a state where the vibrating body is in close contact with the container, and
A pressurizing / depressurizing chamber for applying a pressure corresponding to the internal pressure in the pressurizing / depressurizing container to the boundary membrane member ;
A pressure increasing / decreasing device comprising: a pressure sensor that detects a pressure in the pressure increasing / decreasing chamber; and a determination unit that determines leakage of the boundary film member from a pressure change in a pressure increasing / decreasing chamber in the pressure increasing / decreasing chamber. . In pressurization device according to claim 1 Symbol placement, the pressurization chamber is provided with a separate limiting membrane member having flexibility which penetrates in a state in which the vibrator is in close contact, and, corresponding to the internal pressure of the pressurization chamber A pressure increasing / decreasing device comprising: another pressure increasing / decreasing chamber for applying pressure to the other boundary membrane member. 3. The pressurizing / depressurizing apparatus according to claim 1 or 2 , wherein the pressurizing / depressurizing container further includes a second boundary film member, and a pressure corresponding to the internal pressure in the pressurizing / depressurizing container is applied to the boundary film member. A pressurization / decompression device comprising: a second pressurization / decompression chamber. 4. The pressure increasing / decreasing apparatus according to claim 3 , wherein the pressure P ₁ in the pressure increasing / decreasing container, the pressure P _{2 in} the pressure increasing / decreasing chamber, and the pressure P ₃ in the second pressure increasing / decreasing chamber have the following relationship. A pressurizing / depressurizing device characterized in that:
P ₂ > P ₁ > P ₃ or P ₃ > P ₁ > P ₂

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