WO2021060421A1

WO2021060421A1 - Vacuum filtration apparatus

Info

Publication number: WO2021060421A1
Application number: PCT/JP2020/036144
Authority: WO
Inventors: 隆司金城
Original assignee: 株式会社ロキテクノ
Priority date: 2019-09-27
Filing date: 2020-09-24
Publication date: 2021-04-01
Also published as: TWI757891B; TW202122147A; JP7290532B2; JP2021053548A

Abstract

There is a need for a depressurized-suction type filtration apparatus capable of switching between a depressurization state and a depressurization-stopped state by a simple structure. The problem is solved by a filtration apparatus including: a pump unit having a pump housing and a pump within the pump housing; an unfiltered liquid reservoir capable of storing therein an unfiltered liquid that is a liquid to be filtered; and a filtered liquid reservoir capable of storing therein a filtered liquid obtained by filtering the unfiltered liquid, the filtered liquid reservoir being connected to the pump housing on an upper side thereof and connectable to a lower side of the unfiltered liquid reservoir. The filtration apparatus has an exhaust switching handle.

Description

Decompression type filtration device

The present invention relates to a decompression type filtration device capable of switching between depressurization and decompression stop.

In the filtration of liquids, a pressurizing type filtration device is generally used in which the back pressure of the liquid is increased by a pressurizing means to cause the liquid to flow, and the liquid is passed through a filter to perform filtration. Such a filtration device generally comprises a conduit as a flow circuit through which a liquid flows. On the other hand, as disclosed in Patent Document 1, for example, the internal pressure of the container for storing the filtered liquid after filtration of the liquid is reduced, and when the liquid is sucked into the container, the liquid is passed through a filter for filtration. There is a decompression type filtration device that performs the above. Such an apparatus generally includes a container for containing a liquid to be filtered, a container for storing the filtered liquid after filtration, and a means for reducing the pressure in the container for storing the filtered liquid.

Patent Document 1 discloses a filtration system in which filtration is performed through a sample filter arranged between a sample container and a filtrate storage bottle, and the filtered filtrate is introduced into the filtrate storage bottle. ing.

International Publication No. WO2008 / 144803 Pamphlet

In a decompression type filtration device, it is necessary to increase the degree of sealing of the decompression part with a simple configuration. Further, since it is necessary to reduce the pressure at the place where the filtrate is collected by the decompression means, there is a problem that the filtrate enters the decompression means. In this state, a structure that switches between depressurization and stop of decompression with a simple structure is required.

A pump housing, a pump unit having a pump inside the pump housing, a pre-filtration liquid reservoir capable of storing a pre-filtration liquid which is a liquid to be filtered inside, and a post-filtration liquid obtained by filtering the pre-filtration liquid inside. A post-filtration liquid reservoir that can be stored and is a filtration device including a post-filtration liquid reservoir that is connected to the pump housing on the upper side of the pump housing and can be connected to the lower side of the pre-filtration liquid reservoir. The post-filtered liquid reservoir has an isolation member that defines the inside of the post-filtered liquid reservoir into a storage portion for storing the post-filtered liquid and an exhaust portion communicating with an intake port of the pump. In the post-filtration liquid reservoir, the storage section degassing port that communicates the storage section with the outside is on the side surface of the storage section, and the exhaust port that communicates the exhaust section and the outside is the exhaust section of the post-filtration liquid reservoir. Each of the post-filtered liquid reservoirs is provided with a handle capable of holding the post-filtered liquid reservoir and having an exhaust pipe line inside, and the handle is in the first position of the exhaust pipe. One end of the path is connected to the degassing port of the storage section and the other end of the exhaust pipe line is connected to the exhaust port, and the problem is solved by a filtration device capable of depressurizing the storage section by the pump.

According to the present invention, a decompression suction type filtration device capable of switching between a decompression state and a decompression stop state is realized with a simple structure.

A perspective view of an embodiment of the filtration device of the present invention is shown. It is the figure which showed the cross section 2-2 of FIG. 1, which is the cross section of the filtration apparatus of this invention, and shows the state which the handle is in the 1st position (decompression state). It is a cross section of the filtration device of the present invention, and shows a state in which the handle is in the second position (decompression stopped state). It is a figure which showed the cross section 4-4 of FIG. It is a figure of the pipeline blocking device of the embodiment of the filtration device of the present invention, and shows the state in which the pipeline is not blocked. It is a figure of the pipeline blocking device of the embodiment of the filtration device of the present invention, and shows the state where the conduit is blocked. It is a figure of the conduit blocking device of another shape of the embodiment of the filtration device of this invention. FIG. 5 is a diagram of another embodiment of the filtration device of the present invention in a state where the handle is in the second position.

First, the filtration device 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5C. FIG. 1 is a diagram showing a filtration device 1 of the present invention. FIG. 2 is a view showing a cross section 2-2 of FIG. 1, which is a view showing a cross section of the filtration device 1 in a reduced pressure state. FIG. 3 is a view showing a cross section of the filtration device 1 in the decompression stopped state. FIG. 4 is a diagram showing a cross section 4-4 of FIG. 5A to 5C are views showing a mechanism of blocking the exhaust path in the filtration device 1 of the present invention so that the filtered liquid does not flow into the pump.

First, as shown in FIG. 1, the filtration device 1 includes a pump unit 11, a post-filtration liquid reservoir 12, and a pre-filtration liquid reservoir 13. Here, in the present specification, the liquid to be filtered is referred to as "pre-filtration liquid", and the liquid obtained by filtering the pre-filtration liquid is referred to as "post-filtration liquid". The pre-filtration liquid reservoir 13 can be hermetically connected to the post-filtration liquid reservoir 12 so that it is located above the post-filtration liquid reservoir 12, and the post-filtration liquid reservoir 12 is located above the pump unit 11. A closed connection with 11 is possible. The pump unit 11, the post-filtration liquid reservoir 12, and the pre-filtration liquid reservoir 13 can each be stacked in the vertical direction in the order of the pump unit 11, the post-filtration liquid reservoir 12, and the pre-filtration liquid reservoir 13 from the bottom, and have a cross section. It is a columnar body of the same shape. The cross sections of the pump unit 11, the post-filtration liquid reservoir 12, and the pre-filtration liquid reservoir 13 may be polygonal, represented by a quadrangle. When these are stacked in the vertical direction, they form a polygonal prism shape. In particular, in a typical and preferable example, the cross section is circular, and in this case, the pump unit 11, the post-filtration liquid reservoir 12, and the pre-filtration liquid reservoir 13 are concentric cylinders, which are vertically arranged. When stacked in the direction, the overall shape of the filtration device 1 also becomes cylindrical. In this specification, this will be described as an example. Further, here, the center of these cylindrical shapes in a state where the pump unit 11, the post-filtration liquid reservoir 12, and the pre-filtration liquid reservoir 13 are stacked in this order in the vertical direction is defined as the central axis CL of the filtration device 1. The direction in which the central axis CL extends is the depth direction of the post-filtration liquid reservoir 12 and the pre-filtration liquid reservoir 13.

The pump unit 11 has a circular outer shape having a predetermined radius in cross section, and is composed of a cylindrical pump housing 111 having a hollow inside. Inside the pump housing 111, a degassing pump 112 such as a vacuum pump is built. A protrusion 113 formed so as to rise from the upper surface of the pump housing 111 is provided on the upper side of the pump housing 111, and an intake port 113a communicating with the intake line of the pump 112 is provided on the top of the protrusion 113. , The pump 112 sucks in air from the intake port 113a and discharges it to the external environment. A wall surface 111a rises cylindrically from the upper surface of the pump housing 111 on the outer circumference of the pump housing 111, and a space having a constant volume is formed on the upper surface of the pump housing 111 by the wall surface 111a. Since the upper surface of the pump housing 111 has a protrusion 113 formed so as to be raised, for example, at a substantially central portion, the space is formed around the root of the protrusion 113, and the space is the pump housing 111. It functions as a trap 114 as a liquid pool having the upper surface as the bottom. That is, the liquid component such as mist-like fine droplets contained in the gas guided to the exhaust portion 121b is drawn into the intake port 113a and collides with the protrusion 113 to be liquefied. The liquid that has become liquid and has flowed out from the protrusion 113 flows into the trap 114, which is a liquid pool, to prevent the liquid component from entering the degassing pump 112. A flange 1153 is provided at the end of the wall surface 111a of the pump housing 111.

The post-filtration liquid reservoir 12 is typically a post-filtration liquid reservoir housing 121 having a circular outer shape having a cross section having the same diameter as the cross section of the pump unit 11 and a hollow cylindrical shape inside. It is formed. The post-filtration liquid reservoir housing 121 has openings at both ends, and a flange 1253 is attached to one end on the side connected to the pre-filtered liquid reservoir 13 and a flange 1253 is connected to the opposite end to be connected to the pump unit 11. It has a flange 1251 at the end. The post-filtration liquid reservoir 12 is in contact with the flange 1251 of the post-filtration liquid reservoir 12 and the flange 1153 of the pump housing 111 so as to be located above the pump housing 111. Further, the cross sections of the flange 1251 of the liquid reservoir 12 after filtration and the flange 1153 of the pump housing 111 have at least the same outer diameter dimension and have a common shape. The flange 1251 of the liquid reservoir 12 after filtration and the flange 1153 of the pump housing 111 have a shape protruding outward by the diameter of the flange from their respective main bodies. Then, here, a bag-shaped annular sealing member 5 is prepared so as to wrap both the flange 1251 and the flange 1153 with this diameter as the inner diameter. The sealing member 5 sandwiches the flanges of both the post-filter liquid reservoir 12 and the pump housing 111 so as to wrap around the flanges of the pump housing 111 and the pump housing 111 so that the post-filter liquid reservoir housing 121 is located above the pump housing 111. A closed connection is possible with the liquid reservoir housing 121. The material of the sealing member 5 is a resin such as rubber. That is, the hermetically sealed connection between the pump housing 111 of the pump unit 11 and the post-filtered liquid reservoir 12 is an annular sealing member capable of wrapping the end face of the pump housing 111 of the pump unit 11 and the end face of the post-filtered liquid reservoir 12. It is done by 5.

The post-filtration liquid reservoir 12 has an isolation member 122 arranged in a hollow portion inside the reservoir 12. The isolation member 122 connects to the entire circumference of the inner surface of the liquid reservoir 12 after filtration to store the liquid, and the exhaust unit 121b communicating with the intake port 113a of the pump housing 111 after filtration. It is defined at the bottom of the liquid reservoir 12. An opening is formed in the exhaust portion 121b on the side opposite to the isolation member 122 so that the upper surface side of the pump unit 11 is exposed in the exhaust portion 121b. The storage unit 121a and the exhaust unit 121b do not communicate with each other. The isolation member 122 may be perpendicular to the cylindrical central axis of the post-filtration liquid reservoir 12, or may be tilted as shown in FIG. When the post-filtration liquid reservoir 12 and the pump housing 111 are hermetically connected by the seal member 5, the isolation member 122, the pump housing 111 (the upper surface of the pump housing 111 (trap 114)), and the post-filtration liquid in the post-filtration liquid reservoir 12 The exhaust portion 121b is formed as a space surrounded by the inner surface of the reservoir housing 121 and the inner surface of the pump housing 111 as a space having a volume for exhaust.

The pre-filtration liquid reservoir 13 has a circular outer shape having a cross section having the same diameter as the cross-sectional diameter of the post-filtration liquid reservoir 12, and is formed of a pre-filtration liquid reservoir housing 131 having a hollow cylindrical shape inside. .. The bottom 131a of the pre-filter liquid reservoir housing 131 has a filter 134 for filtering the pre-filtered liquid and a discharge port 132 for discharging the filtered liquid that has passed through the filter 134 to the post-filter liquid reservoir 12. The end of the pre-filtration liquid reservoir 13 on the side where the discharge port 132 is located faces the end of the post-filtration liquid reservoir housing 121. At least one end of the pre-filtration liquid reservoir housing 131 of the pre-filtration liquid reservoir 13 has a flange 1351. A flange 1253 is also provided on the end side of the post-filter liquid reservoir housing 121 of the post-filter liquid reservoir 12 corresponding to this so as to face the flange 1351. The flange 1351 of the pre-filtration liquid reservoir housing 131 of the pre-filtration liquid reservoir 13 and the flange 1253 of the post-filtration liquid reservoir housing 121 of the post-filtration liquid reservoir 12 have at least the same outer diameter and a common shape. is there. The pre-filtration liquid reservoir 13 is in contact with the flange 1253 of the post-filtration liquid reservoir 12 and the flange 1351 of the pre-filtration liquid reservoir housing 131 so as to be located above the post-filtration liquid reservoir housing 121. The cross sections of the flange 1253 of the post-filtration liquid reservoir housing 121 and the flange 1351 of the pre-filtration liquid reservoir housing 131 have the same diameter and are concentric annular shapes. The flange 1253 on the end side of the post-filtration liquid reservoir housing 121 and the flange 1351 of the pre-filtration liquid reservoir housing 131 have a shape protruding outward by the width of each flange from their respective main bodies. Then, here, a bag-shaped annular sealing member 5 that wraps the flange 1253 and the flange 1351 with this diameter as the inner diameter is prepared. The sealing member 5 sandwiches the pre-filtered liquid reservoir housing 121 and the pre-filtered liquid reservoir housing 131 so as to wrap around both flanges so that the pre-filtered liquid reservoir housing 131 is located above the post-filtered liquid reservoir housing 121. A closed connection is possible between the post-filtration liquid reservoir housing 121 and the pre-filtration liquid reservoir housing 131. The storage portion 121a defined by the isolation member 122 of the post-filtration liquid reservoir 12, the inner surface of the post-filtration liquid reservoir 12 and the bottom 131a of the pre-filtration liquid reservoir 13 can store the liquid after filtration in the storage portion 121a. The discharge port 132 for discharging the filtered liquid to the post-filtered liquid reservoir 12 projects from the bottom 131 a of the pre-filtered liquid reservoir 13 so as to be located in the filtered liquid storage portion 121a inside the post-filtered liquid reservoir 12. The discharge port 132 is provided with a discharge valve 133 that reduces the pressure of the post-filter liquid reservoir 12 and discharges the filtered post-filter liquid when the pressure becomes equal to or lower than a predetermined pressure. Hereinafter, a state in which the pre-filtration liquid reservoir 13 is hermetically connected to the post-filtration liquid reservoir 12 and a state in which the post-filtration liquid reservoir 12 and the pump unit 11 are hermetically connected will be described. The material of the sealing member 5 is a resin such as rubber. That is, the closed connection between the post-filtration liquid reservoir 12 and the pre-filtration liquid reservoir 13 is performed by an annular sealing member 5 capable of wrapping the end face of the post-filtration liquid reservoir 12 and the end face of the pre-filtration liquid reservoir 13.

The post-filtration liquid reservoir 12 penetrates the wall surface of the storage unit 121a from the storage unit 121a to the outside through the storage unit degassing port 12a, which is a communication hole penetrating from the storage unit 121a to the outside, and also through the wall surface of the exhaust unit 121b from the exhaust unit 121b to the outside. It has an exhaust port 12b, which is a communication hole. The degassing port 12a of the storage portion is arranged near the end of the post-filtration liquid reservoir 12 on the side closer to the pre-filtration liquid reservoir 13, and the exhaust port 12b is on the side far from the pre-filtration liquid reservoir 13 (the side closer to the pump unit 11). Is placed on the side of the end of the post-filtration liquid reservoir 12. A path for exhausting air in the storage unit 121a from the storage unit 121a to the pump 112 via the storage unit 121a by connecting the storage unit degassing port 12a and the exhaust port 12b by an exhaust pipe line 7. Is defined. In this state, when the pump 112 is operated, the exhaust portion 121b is first depressurized from the intake port 113a, and when the storage portion 121a of the liquid reservoir 12 after filtration is subsequently depressurized via the exhaust pipe line 7, the pressure is released to the atmosphere. The pre-filtration liquid of the pre-filtration liquid reservoir 13 is drawn by a differential pressure toward the depressurized post-filtration liquid reservoir 12, passes through the filter 134, is filtered, and reaches the storage portion 121a of the post-filtration liquid reservoir 12.

A handle 6 is arranged in the liquid reservoir 12 after filtration, and the exhaust pipe line 7 is bored inside the handle 6. The handle 6 is a handle arranged so that the user can easily carry the liquid reservoir 12 after filtration. The execution and stop of the filtration process can be controlled by the operation and stop of the pump 112, but for example, the execution and stop of the filtration process can also be performed by isolating the storage section 121a and the exhaust section 121b. .. For example, as shown in FIGS. 2 and 3, the handle 6 is slidably attached (movably) along the central axis direction, which is the depth direction of the post-filtration liquid reservoir 12. At this time, in the state of FIG. 2 (first state), the storage unit 121a and the exhaust pipe line 7 communicate with each other by connecting the exhaust pipe line 7 and the storage unit degassing port 12a. At this position, the exhaust pipe line 7 and the exhaust port 12b are set to match, the exhaust pipe line 7 and the exhaust port 12b are connected, and the exhaust pipe line 7 and the exhaust portion 121b communicate with each other. ing. In this first state, the exhaust unit 121b is first depressurized, the exhaust pipe line 7 communicating with the storage unit degassing port 12a is subsequently depressurized by the decompression, and finally the inside of the storage unit 121a is depressurized. It is in a state. The air in the storage section 121a is exhausted from the storage section 121a through the exhaust pipe line 7 through the exhaust section 121b by the pump 112.

Subsequently, as in the state of FIG. 3 (second state), the handle 6 is slid and moved along the depth direction, which is the central axis direction of the liquid reservoir 12 after filtration. In the first state, the storage unit degassing port 12a and the exhaust pipe line 7 matched, but due to this movement, in the second state, the positions of the storage unit degassing port 12a and the exhaust pipe line 7 and At least one of the positions of the exhaust pipe line 7 and the exhaust portion 121b is set so as not to match. In FIG. 3, as the second state, it is shown that both the positions of the storage section degassing port 12a and the exhaust pipe line 7 or the positions of the exhaust pipe line 7 and the exhaust section 121b do not match. , At least one of them does not match. By making the handle 6 of the post-filter liquid reservoir 12 movable with respect to the post-filter liquid reservoir 12 in this way, the degassing port 12a and the exhaust port 12b of the storage portion can be easily connected to each other via the exhaust pipe line 7. It is possible to create a non-communication state that releases the first state without communication. At this time, the storage portion 121a of the liquid reservoir 12 after filtration is in a decompression stop state, that is, a non-decompression state (second state), which is not decompressed by the pump 112. As described above, in the present invention, the handle 6 can function not only for carrying the liquid reservoir 12 after filtration but also as a switch for switching between depressurization and decompression stop of the filtration device 1. In the communicating state, a sealing member is arranged between the exhaust pipe line 7 and the degassing port 12a of the storage portion and between the exhaust pipe line 7 and the exhaust port 12b so that the seal member can be sealed. It is preferable to keep it.

The movement of the handle 6 is, as in this embodiment, for example, the pump housing 111 of the pump unit 11, the post-filtration liquid reservoir housing 121 of the post-filtration liquid reservoir 12, and the pre-filtration liquid reservoir housing of the pre-filtration liquid reservoir 13. It is possible to form a form (FIGS. 2 and 3) that slides along the direction of the central axis CL when the 131 is assembled. However, the form of movement is not limited to this, and for example, a form of rotation around an axis orthogonal to the central axis CL may be used. The handle 6 is a communication state in which the exhaust pipe line 7 and the

degassing ports

12a and 12b of the storage portion communicate with each other, that is, an exhaust state (first state) and a non-communication state in which the exhaust pipe line 7 and the storage

unit degassing ports

12a and 12b communicate with each other, that is, a non-exhaust state (second state). As long as it is aroused by the movement of the handle 6, the direction of movement of the handle 6 and the form of movement are not limited.

Also, in operation, in order to prevent contamination, the liquid in the pre-filtration liquid reservoir 13 is managed so that the liquid after filtration is below the discharge port 132. For example, it is conceivable that the pump 112 is automatically stopped when the liquid after filtration reaches the discharge port 132. On this premise, by arranging the storage section degassing port 12a in which the exhaust pipe line 7 and the storage section 121a communicate with each other above the discharge port 132, it is possible to prevent the filtered liquid from entering the storage section degassing port 12a. be able to. Further, in order to recover a larger amount of the filtered liquid while preventing the liquid after filtration from entering the storage unit degassing port 12a, the storage unit degassing port 12a is vertically along the central axis of the filtration device 1. It is desirable to install it on the upper side of the direction.

Further, as described above, the handle 6 of the post-filtration liquid reservoir 12 is moved with respect to the post-filter liquid reservoir 12, and at least one of the degassing port 12a and the exhaust port 12b of the storage portion and the exhaust pipe line 7 match. When the non-communication state is set, the communication portion can be arranged so that the storage portion degassing port 12a and / or the exhaust port 12b in which the exhaust pipe line 7 and the storage portion 121a communicate with each other are open to the atmosphere. That is, when the exhaust pipe line 7 and the storage unit degassing port 12a are not in communication with each other, the storage unit degassing port 12a is exposed to the outside and the storage unit 121a is opened to the atmosphere. When the exhaust pipe line 7 and the exhaust port 12b are not in communication with each other, the exhaust port 12b is exposed to the outside and the exhaust portion 121b is opened to the atmosphere. Further, the positional relationship between the exhaust pipe line 7, the storage section degassing port 12a, and the exhaust port 12b is as follows: a state in which the storage section degassing port 12a is exposed to the outside and the storage section 121a is in an open state to the atmosphere, and exhaust. The state in which the mouth 12b is exposed to the outside and the exhaust portion 121b is opened to the atmosphere may be set at the same time. As a result, in the second state, the storage unit 121a can be opened to the atmosphere at the same time as the exhaust is stopped. Further, when the exhaust pipe line 7 and the storage unit degassing port 12a communicate with each other, a first state is formed in which the exhaust pipe line 7 and the exhaust port 12b also communicate with each other, and conversely, the exhaust pipe line 7 and the storage unit degassing port 12a are formed. When they are not communicating with each other, a second state is formed in which the exhaust pipe line 7 and the exhaust port 12b are not communicated with each other and are open to the atmosphere. When the pump 112 is in the operating state, the storage section 121a and the exhaust section 121b communicate with each other if the exhaust pipe line 7, the storage section degassing port 12a, and the exhaust port 12b are communicated with each other by setting the handle 6 to the first state. The filtration process proceeds. On the other hand, if the handle 6 is moved to a position where the exhaust pipe line 7 does not communicate with the storage section degassing port 12a and the exhaust port 12b, the communication between the storage section 121a and the exhaust section 121b is cut off, and the storage section degassing port 12a And / or the exhaust port 12b is opened to the atmosphere, and the filtration process is stopped, and the inside of the storage unit 121a and / or the exhaust unit 121b can be easily returned to the atmospheric environment. When the exhaust pipe line 7 is in the second state of being open to the atmosphere without communicating with the degassing port 12a of the storage portion, the force of attraction between the post-filtration liquid reservoir 12 and the pre-filtration liquid reservoir 13 is reduced, and after filtration. The liquid reservoir 12 and the pre-filtration liquid reservoir 13 can be easily separated. Further, in the second state in which the exhaust pipe line 7 is open to the atmosphere without communicating with the exhaust port 12b, even if the pump 112 is operating, the exhaust portion 121b is open to the atmosphere. The force attracted to the post-filtration liquid reservoir 12 is reduced, and the pump unit 11 and the post-filtration liquid reservoir 12 can be easily separated.

In principle, it is necessary to prevent the filtered liquid from entering the storage section degassing port 12a by arranging the storage section degassing port 12a in which the exhaust pipe line 7 and the storage section 121a communicate with each other above the discharge port 132. However, for example, it is conceivable that the filtrate is mixed in the exhaust pipe line 7. Since the filtrate enters the exhaust pipe line 7 in the form of fine droplets or mist, it may enter the exhaust portion 121b. Therefore, as described above, in the exhaust portion 121b, the protrusion 113 and the trap 114 prevent the liquid component from entering the pump 112. In addition to this, in the present embodiment, further, when a certain amount of liquid is mixed into the exhaust pipe line 7, the exhaust pipe line 7 is closed to block the internal gas flow. 8 is arranged. Hereinafter, the pipeline blocking device 8 for closing the pipeline will be described in detail with reference to FIGS. 5A and 5B.

The pipeline cutoff device 8 is arranged in the exhaust pipeline 7. The pipeline blocking device 8 includes a liquid pool portion 8a and a floating member 8b. The exhaust line 7 includes a first exhaust line 7a, a second exhaust line 7b communicating with the first exhaust line 7a, and a third exhaust line 7c communicating with the second exhaust line 7b. The portion connected to the storage section degassing port 12a is the first exhaust pipe line 7a, and the portion connected to the exhaust port 12b is the third exhaust pipe line 7c. The first exhaust line 7a and the third exhaust line 7c are bored in the horizontal direction, and the second exhaust line 7b is a vertical line extending in the vertical direction, and both ends thereof are the first. It communicates with the exhaust pipe line 7a and the third exhaust pipe line 7c. In the pipeline cutoff device 8, the second exhaust pipeline 7b is arranged at the lower end in the vertical direction between the second exhaust pipeline 7b and the third exhaust pipeline 7c. That is, the liquid pool portion 8a is a recess that is arranged at a position where the exhaust pipe line 7 changes its direction at a right angle and can receive the liquid. The intersection of the second exhaust pipe 7b and the third exhaust pipe 7c is at the bottom of the second exhaust pipe 7b extending in the vertical direction, and the effect of gravity and the gas accelerated by the second exhaust pipe 7b are exerted. By colliding with the third exhaust pipe line 7c, the liquid component in the gas is likely to be liquefied in the vicinity of the liquid pool portion 8a, and the liquid filtered liquid in the exhaust pipe line 7 is likely to be collected in the liquid pool portion 8a.

A floating member 8b is arranged in the liquid pool portion 8a. The floating member 8b is a member made of a material having a specific gravity smaller than that of the liquid to be filtered. The shape is typically a sphere. When no liquid has entered the exhaust pipe line 7, the size of the liquid pool portion 8a is set so that the floating member 8b does not interfere with the gas flow on the path of the exhaust pipe line 7. (Fig. 5A). That is, the size and shape of the floating member 8b are set so that the floating member 8b can be removed from the flow path through which the gas flows from the second exhaust pipe line 7b to the third exhaust pipe line 7c without obstructing the gas flow. Then, when the liquid contained in the gas in the liquid state or the mist state mixed with the gas invades the exhaust pipe line 7, that is, the second exhaust pipe line 7b, it is liquefied and accumulated in the liquid pool portion 8a. As the liquid collects in the liquid pool 8a, the floating member 8b floats on the liquid and rises as the liquid level rises. The floating height of the floating member 8b increases according to the amount of liquid in the liquid pool portion 8a. The size and shape of the liquid pool portion 8a and the floating member 8b are such that when a predetermined amount of liquid is collected in the liquid pool portion 8a, the floating member 8b completely blocks the exhaust pipe line 7 leading to the intake port 113a ( Set so as to be in FIG. 5B). As a result, when a predetermined amount of liquid is accumulated in the liquid pool portion 8a, the floating member 8b is located at an obstructive position at the uppermost portion of the liquid pool portion 8a, and the second exhaust pipe line 7b to the third exhaust pipe line are located. Block the flow path to 7c. Since the gas does not flow into the third exhaust pipe line 7c, the exhaust pipe line 7 from the storage unit 121a to the exhaust unit 121b can be shut off. This makes it possible to prevent the liquid from reaching the inside of the pump 112 from the intake port 113a.

The moving direction of the floating member 8b of the pipeline blocking device 8 is determined by the shape of the inner wall surface of the liquid pool portion 8a. For example, in one embodiment, as shown in FIGS. 5A and 5B, the moving direction of the floating member 8b is set so as to divide the angle formed by the second exhaust pipe line 7b and the third exhaust pipe line 7c into two. To. For example, when the second exhaust pipe line 7b and the third exhaust pipe line 7c are at right angles, the moving direction of the floating member 8b is set to an angle of 45 degrees with respect to the horizontal direction as shown in FIGS. 5A and 5B. Set. In this case, the central axis of the liquid pool portion 8a is set to have an angle of 45 degrees with respect to the third exhaust pipe line 7c. Then, a wall surface having substantially the same diameter as the floating member 8b is provided around the central axis of the liquid pool portion 8a. However, as shown in FIG. 5C, the moving direction of the floating member 8b may be set in the vertical direction as in the second exhaust pipe line 7b. FIG. 5C is a pipeline blocking device 8 of this form. In FIG. 5C, the floating member 8b in the state where the exhaust pipe line 7 is not cut off is shown by a solid line, and the floating member 8b in the state where the exhaust pipe line 7 is cut off is shown by a broken line. In this case, the moving direction of the floating member 8b is set to the vertical direction. Then, a wall surface having substantially the same diameter as the floating member 8b may be provided around the central axis of the liquid pool portion 8a. Even in this form, when the liquid does not enter the exhaust pipe line 7, the size of the liquid pool portion 8a is such that the floating member 8b does not interfere with the gas flow on the path of the exhaust pipe line 7. The size is set (solid line in FIG. 5C), and when a predetermined amount of liquid is accumulated in the liquid pool portion 8a, the floating member 8b completely blocks the exhaust pipe line 7 (broken line in FIG. 5C). It should be set to.

In the embodiment described above, the handle 6 slides along the depth direction, which is the central axis direction of the post-filtration liquid reservoir 12. However, the moving direction of the handle 6 is not limited to this, and the moving direction of the handle 6 can be freely set as much as possible to change the state between the decompressed state (first state) and the non-decompressed state (second state). For example, as shown in FIG. 6, the handle 6 is arranged with a pivot portion that can rotate around the normal direction of the surface perpendicular to the wall surface of the post-filter liquid reservoir 12, and the surface perpendicular to the wall surface of the post-filter liquid reservoir 12. It can be set to realize a depressurized state (first state) and a non-decompressed state (second state) by rotating and moving around the normal direction of. For example, in FIG. 6, the handle 6 shown by the solid line may be set to be in the first state, and the handle 6 shown by the alternate long and short dash line may be set to be in the second state. Further, although not shown in the figure, the handle 6 may be slid along the surface of the liquid reservoir 12 after filtration.

This application claims the priority from Japanese Patent Application No. 2019-177098 filed on September 27, 2019, and the contents are cited as part of this application.

1 Filtering device 11 Pump unit 12 Post-filtered liquid reservoir 13 Pre-filtered liquid reservoir 5 Sealing member 111 Pump housing 112 Pump 113 Protrusion 113a Intake port 121 Post-filtering liquid reservoir housing 122 Isolation member

121a Storage section

121b Exhaust section 6 Handle 7 Exhaust pipeline 7a First exhaust pipeline 7b Second exhaust pipeline 7c Third exhaust pipeline 8 Pipe line shutoff device

8a Liquid pool

8b Floating member 131 Liquid reservoir housing 132 Discharge port 133 Discharge valve 134 Filter

Claims

A pump housing and a pump unit having a pump inside the pump housing,
A pre-filtration liquid reservoir that can store the pre-filtration liquid, which is the liquid that filters inside,
It is a post-filtration liquid reservoir that can store the post-filtration liquid obtained by filtering the pre-filtration liquid inside, and can be connected to the pump housing on the upper side of the pump housing and can be connected to the lower side of the pre-filtration liquid reservoir. A filtration device including a post-filtration liquid reservoir.
The post-filtered liquid reservoir has an isolation member that defines the inside of the post-filtered liquid reservoir into a storage portion for storing the post-filtered liquid and an exhaust portion communicating with an intake port of the pump.
In the post-filtration liquid reservoir, the storage section degassing port that communicates the storage section with the outside is on the side surface of the storage section, and the exhaust port that communicates the exhaust section and the outside is the exhaust section of the post-filtration liquid reservoir. Have each on the side of
The post-filtered liquid reservoir is capable of holding the post-filtered liquid reservoir and includes a handle having an exhaust pipeline inside.
At the first position, the handle connects the degassing port of the storage portion at one end of the exhaust pipe line and the exhaust port at the other end of the exhaust pipe line, and the pump connects the storage portion. A filtration device capable of depressurizing.
The filtration device according to claim 1.
The handle is movable from the first position to the second position, and at the second position, the connection with the storage degassing port at one end of the exhaust pipeline and the other of the exhaust pipeline. A filtration device that disconnects at least one of the connection with the exhaust port at the end to stop the decompression of the storage unit by the pump.
The filtration device according to claim 2.
The second position of the handle is a filtration device that opens the degassing port of the storage unit to the atmosphere.
The filtration device according to claim 2 or 3.
The second position of the handle is a filtration device that opens the exhaust port to the atmosphere.
The filtration device according to claim 2.
A filtration device in which the movement of the handle between the first position and the second position is a movement along the depth direction of the post-filtration liquid reservoir.
The filtration device according to claim 2.
A filtration device in which the movement of the handle between the first position and the second position is a rotational movement about an axis perpendicular to the side surface of the post-filtration liquid reservoir.
The filtration device according to any one of claims 2 to 6.
The exhaust pipe line has a liquid pool portion and a floating member arranged in the liquid pool portion, and when the post-filtered liquid is mixed in the exhaust pipe line, the post-filtered liquid is collected in the liquid pool. A filtration device that collects in a portion and floats the floating member by the liquid in the liquid pool portion to close the exhaust pipe line leading to the intake port.
The filtration device according to claim 7.
The exhaust pipeline of the handle includes a vertical pipeline extending in the vertical direction at the first position, and the liquid pool portion is a filtration device arranged below the vertical pipeline.