KR102532751B1 - Piston - Google Patents

Abstract

The present invention relates to a piston capable of selectively and freely providing external substances or discharging separated substances while preventing contamination of centrifuged substances, increasing the yield and purity of substances, and maintaining an airtight state.

Description

Piston {PISTON}

The present invention relates to a piston capable of selectively and freely providing external substances or discharging separated substances while preventing contamination of centrifuged substances, increasing the yield and purity of substances, and maintaining an airtight state.

BACKGROUND A container such as a predetermined syringe and a piston are used when separating a substance from a living tissue, washing the separated substance, injecting the substance into a target body part, or providing various additives to the substance.

For example, since the obtained biological tissue contains oil, blood, body fluid, etc., centrifugation is required to use the biological tissue.

When centrifugation is performed on the obtained biological tissue, various materials included in the biological tissue are separated in different layers due to their different specific gravity.

At this time, when separating the material located in the upper layer and the material located in the lower layer, it is necessary to prevent contamination due to air exposure.

In addition, in order to increase the yield of the desired material and remove impurities, it is necessary to press and concentrate the material located in the lower layer with the force of centrifugal force.

In addition, the separated material is not separately transferred to another container, and if necessary, external substances (eg, additives, washing liquid, etc.) are provided to the material in a situation where the separated material is sealed, or the separated material is freely discharged if necessary. Should be.

Therefore, a device capable of solving these problems is required.

Registered Patent No. 10-2051207

The present invention has been made to solve the above problems, while preventing contamination of the centrifuged material, increasing the yield and purity of the material, and providing an external material or discharging the separated material in a sealed state. Its purpose is to provide a piston that can be made freely.

Piston according to an embodiment of the present invention, the main body having a mounting space through the vertical direction; an opening and closing member mounted within the mounting space; and an elastic member mounted in the mounting space and elastically biasing the opening/closing member in a downward direction. The main body includes a slit provided on an inner circumferential surface portion of the mounting space and extending in a vertical direction, and when the opening and closing member is positioned below the slit, an outer circumferential surface of the opening and closing member is disposed on the mounting space. In close contact with the circumferential surface of the space, when the opening and closing member is located at a height overlapping the slit, material is circulated between the slit and the opening and closing member.

According to one embodiment, the weight is mounted in the mounting space and has a predetermined mass; further comprising, wherein the weight is located on the elastic member in the mounting space, the centrifugal force in the downward direction with respect to the piston When applied, the weight changes its position downward.

According to one embodiment, the weight is formed on the inside and includes at least one of a through hole formed on the inside and vertically extending through, and a slit line formed on the outside and extending vertically.

According to one embodiment, the opening and closing member includes a one-way valve, the one-way valve is closed in one direction and open in the opposite direction, restricting the upward or downward flow.

According to one embodiment, the loading direction of the opening/closing member is selectively varied in the loading space, so that the one-way valve selectively restricts the upward flow or the downward flow of the material.

According to one embodiment, the one-way valve includes a valve passage penetrating the opening and closing member in a vertical direction, and an elastic panel disposed within the valve passage and opening and closing the valve passage, and the elastic panel can be restored and deformed. Accordingly, the opening and closing of the valve passage is performed.

According to one embodiment, the valve passage has a lower hole and an upper hole having different cross-sectional areas, a step is formed between the upper hole and the lower hole, and at least a portion of the elastic panel is fixed within the valve passage. At least one portion is positioned to be in close contact with the step, and when the elastic panel comes into close contact with the step, the valve passage is closed, and when the elastic panel is deformed and the elastic panel is separated from the step, the valve passage open

According to one embodiment, the elastic panel includes an outer ring, and an opening/closing portion positioned inside the outer ring and having one end connected to the outer ring to be bent/restored.

According to one embodiment, the main body includes an upper body constituting an upper portion of the main body, and a lower body constituting a lower portion of the main body and having a space therein, the upper body and the lower body. The bodies are separable from each other, and when the upper body and the lower body are separated, the mounting space is opened.

According to one embodiment, the main body is mounted in the space and includes a pipe member having a hollow, the hollow of the pipe member forms the mounting space, and the slit is formed on an inner surface of the pipe member .

According to an embodiment of the present invention, it is possible to finely open and close the opening and closing member inside the piston.

According to the embodiment of the present invention, the upward displacement width of the opening and closing member can be easily selected under the same centrifugal force by selecting the mass of the weight, and the opening width of the slit can be finely adjusted.

According to an embodiment of the present invention, when the material located in the upper layer and the material located in the lower layer are separated by centrifugal separation, contamination due to air exposure can be prevented.

According to an embodiment of the present invention, since the piston pressurizes the separated material by centrifugal force, the yield and purity of the desired material can be improved.

According to an embodiment of the present invention, the separated material is not separately transferred to another container, and, if necessary, an external material, etc. (eg, additives, washing liquid, etc.) is provided to the material in a situation where the separated material is kept sealed, or The separated material can be discharged freely. Accordingly, cleaning fluid, substances, etc. can be freely moved in one direction through the piston. In addition, the movement restriction direction and the free movement direction of the material can be freely selected.

1 is a view showing the appearance of a piston according to an embodiment of the present invention. 2 is an exploded view of a piston according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of FIG. 1 .
4 is an exploded view of a main body of a piston according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of the main body. 6 to 8 are views each showing one form according to an embodiment of a pipe member of a main body of a piston according to an embodiment of the present invention.
9 and 10 are views showing one form of the opening and closing member of the piston according to one embodiment of the present invention. 9 and 10 are views showing the direction in which the opening and closing member is viewed from above and below, respectively.
11 is a view showing one form of a weight of a piston according to an embodiment of the present invention.
12 is a view showing a specific disassembly structure of the opening and closing member of the piston according to an embodiment of the present invention, and FIGS. 13 and 14 are cross-sectional views of the opening and closing member, showing material transfer of the opening and closing member having a one-way valve.
15 is a view showing a piston according to an embodiment of the present invention, showing a state in which no external force is applied.
16 is a view showing a piston according to an embodiment of the present invention, showing a state in which centrifugal force is applied.
17 is a view showing a piston according to an embodiment of the present invention, showing a state in which the piston is pressed downward by pressing it.
Fig. 18 is a diagram showing a case where a cleaning liquid or the like is injected into a piston having an opening/closing member having a one-way valve.
Fig. 19 is a view showing material passing from bottom to top for a piston with an opening/closing member with a one-way valve;

Hereinafter, preferred embodiments according to the present invention will be described.

The present invention relates to a piston that can be used in a container for a centrifugal separator, a syringe, or the like, for centrifugal separation, storage of substances, and the like.

1 is a view showing the appearance of a piston 1 according to an embodiment of the present invention. Figure 2 is an exploded view of the piston 1 according to an embodiment of the present invention, Figure 3 is a cross-sectional view of Figure 1.

Hereinafter, the term “up and down direction” meaning a direction is based on the direction shown in FIG. 1 . However, this does not limit a specific direction.

Piston 1 according to an embodiment of the present invention, the main body 100 having a mounting space 102 through the vertical direction; an opening/closing member 200 mounted in the mounting space 102; and an elastic member 300 mounted in the mounting space 102 and elastically biasing the opening/closing member 200 in a downward direction. includes In addition, the piston 1 according to an embodiment of the present invention may further include a weight 400 mounted in the mounting space 102 and having a predetermined mass.

<Main body (100)>

4 is an exploded view of the main body 100 of the piston 1 according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of the main body 100. 6 to 8 are views each showing one form according to an embodiment of the pipe member 130 of the main body 100 of the piston 1 according to an embodiment of the present invention.

The main body 100 is a member constituting the exterior of the piston 1. The main body 100 may have a cylindrical three-dimensional shape as a whole. The main body 100 may have a mounting space 102 that is vertically ventilated therein. An upper through hole 106 and a lower through hole 108 penetrating vertically may be formed in the upper and lower portions of the mounting space 102 .

The main body 100 includes a slit 104 . The slit 104 may be formed on an inner circumferential surface portion of the mounting space 102 . A slit 104 may be formed in an upper portion of the mounting space 102 and extends in a vertical direction. The shape of the slit 104 may vary, and the number may also be one or several.

According to a specific embodiment, the main body 100 comprises an upper body 110 constituting an upper portion of the main body 100, and a lower portion of the main body 100, and a space is provided therein A formed lower body 120 may be included. For example, the upper body 110 and the lower body 120 may be screwed together.

The upper body 110 and the lower body 120 can be separated from and combined with each other. Accordingly, when the upper body 110 and the lower body 120 are separated, the mounting space 102 may be opened. When the mounting space 102 is opened, the opening/closing member 200, the elastic member 300, and the weight 400 mounted in the mounting space 102 may be selectively replaced. In addition, the mounting direction of the opening and closing member 200 may be selectively varied.

According to one embodiment, the main body 100 may include a pipe member 130 mounted in the space and having a hollow. As the pipe member 130 is mounted in the space, the hollow of the pipe member 130 forms the mounting space 102 .

According to the embodiment, the slit 104 may be formed on an inner circumferential surface of the pipe member 130 . Specifically, the slit 104 is formed on the upper portion of the pipe member 130 and may extend downward. The slit 104 may be formed along the circumferential direction of the pipe member 130 .

For example, as shown in FIG. 6 , a plurality of slits 104 may be provided. Meanwhile, the slit 104 may have a different shape depending on the embodiment. For example, as shown in FIG. 6, the slit 104 may be a semi-circular groove. As another example, as shown in FIG. 7 , slits 104 may be angled grooves. On the other hand, as another example, as shown in FIG. 8, the slit 104 has an upper part of the inner circumferential portion of the pipe member 130 as a whole than the lower part (ie, has a larger inner diameter than the lower part). may be a composition. That is, the slit 104 may be understood to collectively refer to a configuration in which the outer circumferential surface of the opening and closing member 200 and the inner circumferential surface of the pipe member 130 are spaced apart from each other to allow material to flow.

As in the embodiment, the pipe member 130 is provided separately from the lower body 120 and the upper body 110, and the slit 104 is formed in the pipe member 130, so the size of the slit 104 , the position can be conveniently and selectively varied. In addition, since the pipe member 130 surrounds the inner surface of the mounting space 102 , materials may also be prevented from leaking through the gap between the upper body 110 and the lower body 120 .

According to the embodiment, the main body 100 may further include an outer seal ring 140 (seal-ring) and an inner seal ring 150.

The outer seal ring 140 may be provided on an outer circumferential surface of the main body 100 . Therefore, the outer seal ring 140 can seal between the outer circumferential surface of the piston 1 and the syringe when the piston 1 is inserted into a syringe or the like for centrifugal separation.

The inner seal ring 150 may be provided between the upper body 110 and the lower body 120 . Specifically, the inner seal ring 150 may be fitted between the upper part of the pipe member 130 and the upper body 110 as shown in the drawing. Thus, the inner seal ring 150 may seal between the upper body 110 and the lower body 120 .

<Opening and closing member 200>

9 and 10 are views showing one form of the opening and closing member 200 of the piston 1 according to one embodiment of the present invention. 9 and 10 are views showing the viewing direction of the opening and closing member 200 from above and below, respectively.

The opening/closing member 200 is mounted in the mounting space 102 and is a member whose position is variable in the vertical direction within the mounting space 102 .

According to the embodiment, the opening and closing member 200 may include a body portion 202 and a sealing portion 204 provided around an outer circumference of the body portion 202 .

The position of the opening/closing member 200 is variable in the vertical direction within the mounting space 102 .

At this time, when the opening and closing member 200 is located below the slit 104, the outer circumferential surface of the opening and closing member 200 (specifically, the sealing portion 204) is the circumference of the mounting space 102. Adhere to the entire face. Therefore, a gap does not occur between the opening and closing member 200 and the main body 100 . In this case, the flow of material between the opening and closing member 200 and the main body 100 may be blocked.

Meanwhile, when the opening and closing member 200 is positioned at a height overlapping the slit 104, a gap is generated between the slit 104 and the opening and closing member 200. That is, the slit 104 is opened. In this case, the material may be distributed between the opening and closing member 200 and the main body 100 .

<Elastic member 300>

The elastic member 300 is mounted in the mounting space 102 . The elastic member 300 may elastically bias the opening/closing member 200 in a downward direction. The elastic member 300 may be, for example, a coil spring. However, it is not limited thereto, and any member capable of applying elasticity may be used.

When there is no external force (centrifugal force), the elastic member 300 elastically biases the opening/closing member 200 in a downward direction. Therefore, the lower surface of the opening and closing member 200 is in close contact with the lower surface of the mounting space 102, and the sealing portion 204 of the opening and closing member 200 is the inner peripheral surface of the mounting space 102 (according to the embodiment, the pipe member ( 130)). Accordingly, the opening/closing member 200 can block the movement of materials above and below the piston 1 .

When an external force (centrifugal force) that overcomes the elastic bias of the elastic member 300 is applied and the opening and closing member 200 is displaced upward, there is a gap between the lower surface of the opening and closing member 200 and the lower surface of the mounting space 102 do. In addition, when the opening/closing member 200 rises to the position where the slit 104 is located, materials can be moved up and down the piston 1 through the gap between the slit 104 and the opening/closing member 200 .

<Weight (400)>

11 is a view showing one form of the weight 400 of the piston 1 according to one embodiment of the present invention.

The piston 1 according to an embodiment of the present invention may further include a weight 400 mounted in the mounting space 102 and having a predetermined mass.

The weight 400 is made of a material having a predetermined mass, and may be made of, for example, a metal material. However, it is not limited to this.

The weight 400 is located on the elastic member 300 within the mounting space 102 . The weight 400 may have a slit line 410 on an outer circumferential surface. In addition, the weight 400 may have a through hole 420 passing vertically through the central portion.

When centrifugal force is applied downward to the piston 1, the weight 400 also receives the centrifugal force and changes its position downward. Accordingly, the weight 400 presses the elastic member 300 downward.

Specifically, when centrifugal force is applied to the piston 1 by centrifugal separation, the weight 400 receives the centrifugal force and moves downward (centrifugal force direction). Accordingly, the elastic member 300 is pressed downward. Accordingly, the elastic modulus of the elastic member 300 and the centrifugal force applied to the weight 400 are combined to press the opening/closing member 200 . This can control the width of the upward displacement (ie displacement in the opposite direction of the centrifugal force) of the opening and closing member 200 .

For example, when the mass of the weight 400 is large, it receives a large centrifugal force. Therefore, during centrifugal separation, the elastic member 300 is pressed with a greater force. Accordingly, the upward displacement range of the opening and closing member 200 may be further limited. Thus, the slit 104 is opened relatively small, and the amount of movement of the material through the slit 104 can be reduced.

On the other hand, when the mass of the weight 400 is small, it receives a small centrifugal force. Therefore, during centrifugal separation, the force pressing the elastic member 300 is relatively small. Accordingly, an upward displacement range of the opening and closing member 200 may be relatively increased. Accordingly, the slit 104 is opened relatively large, and the amount of material moving through the slit 104 can be increased.

Therefore, by selecting the mass of the weight 400, it is possible to simply select the upward displacement width of the opening and closing member 200 under the same centrifugal force. In addition, the opening width of the slit 104 by the opening/closing member 200 may be finely adjusted during centrifugation according to the user's selection.

At this time, as described above, selection and replacement of the weight 400 can be made simply by opening the mounting space 102 by separating the upper body 110 and the lower body 120 of the main body 100. there is.

In addition, as described above, since the slit line 410 and the through hole 420 are formed on the outer circumferential surface of the weight 400 according to the embodiment, the weight 400 will not interfere with the movement of materials. can

<Opening/closing member 200 including one-way valve 208>

12 is a view showing a specific disassembly structure of the opening and closing member 200 of the piston 1 according to an embodiment of the present invention, and FIGS. 13 and 14 are cross-sectional views of the opening and closing member 200.

According to one embodiment, the opening and closing member 200 may include a one-way valve 208 .

The one-way valve 208 may be configured to remain closed in one direction and open in the opposite direction to limit the upward flow of material or to limit the downward flow of material.

For example, when the one-way valve 208 blocks upward mass movement and frees downward mass movement, the mass can be transferred from above to below the piston 1 . For example, when it is necessary to inject the cleaning liquid under the piston 1, the one-way valve 208 blocks upward material movement and allows downward material movement to be free.

As another example, when the one-way valve 208 blocks downward material movement and frees upward material movement, the material may be transferred from the bottom to the top of the piston 1 .

In addition, according to the embodiment, the upward flow restriction and the downward flow restriction by the one-way valve 208 can be selectively performed by the user.

When this is explained concretely, it is as follows. As described above, the mounting space 102 of the main body 100 can be opened/closed. For example, when the upper body 110 and the lower body 120 are separated from each other, the mounting space 102 is opened. When the mounting space 102 is opened, the opening/closing member 200 can be taken out of the mounting space 102 . At this time, a mounting direction in which the opening/closing member 200 is mounted in the mounting space 102 may be selected. That is, the mounting direction of the opening and closing member 200 may be selectively varied.

Therefore, when the user wants to limit the downward movement of substances using the one-way valve 208, the one-way valve 208 mounts the opening/closing member 200 in the direction in which the downward movement of substances is restricted. What is necessary is just to mount it in space 102.

Conversely, when the user wants to limit upward material movement using the one-way valve 208, the one-way valve 208 mounts the opening/closing member 200 in the direction in which the upward material movement is restricted. What is necessary is just to mount it in space 102.

Accordingly, by appropriately selecting the mounting direction of the one-way valve 208, it is possible to select upper or lower material movement restriction by the one-way valve 208.

Referring to the detailed configuration of the opening and closing member 200 having the one-way valve 208 according to an embodiment, the following will be described with reference to the drawings.

As described above, the opening and closing member 200 includes a body portion 202 and a sealing portion 204 provided on an outer circumferential surface of the body portion 202 . In addition to this, the body portion 202 of the opening/closing member 200 has a valve passage 206 through which it passes in the vertical direction. An elastic panel 230 is provided in the valve passage 206 , and the elastic panel 230 can open and close the valve passage 206 .

According to a specific example, the body portion 202 of the opening and closing member 200 may include an opening and closing body 210 and a fitting ring 220 .

The opening and closing body 210 has a first hollow 212 vertically penetrated inside. A step 218 is formed in the first hollow 212 . Accordingly, the first hollow 212 includes a lower hole 214 and an upper hole 216 . The upper hole 216 has a larger inner diameter than the lower hole 214 .

The fitting ring 220 has a second hollow 222 penetrating vertically. The fitting ring 220 may be fitted into the upper hole 216 of the first hollow 212 .

In addition, the opening and closing member 200 may include an elastic panel 230 . The elastic panel 230 is disposed in the upper hole 216 in the first hollow 212 and is positioned on the step 218 . Accordingly, the elastic panel 230 may be disposed between the opening and closing body 210 and the fitting ring 220 .

A specific configuration of the elastic panel 230 according to the embodiment may be as follows. The elastic panel 230 may include a ring-shaped outer ring 232 constituting an outer circumferential portion and a panel-shaped opening/closing portion 234 disposed inside the outer ring 232 .

The outer ring 232 is inserted between the opening and closing body 210 and the fitting ring 220 . Therefore, the position is fixed.

One end of the opening/closing part 234 is connected to the outer ring 232. The opening/closing part 234 can be folded/recovered by an external force. The opening/closing part 234 may be larger than the lower hole 214 of the first hollow 212 and smaller than the second hollow 222 . The opening/closing part 234 may be in close contact with the step 218 of the first hollow 212 at normal times. In addition, when an external force is applied to the opening/closing part 234 , the opening/closing part 234 is folded/restored so that it can be spaced apart from the step 218 or come into close contact with the step 218 .

13 and 14 are views showing material transfer of the opening/closing member 200 having the one-way valve 208, as in the embodiment.

As shown in FIG. 13 , when the opening/closing part 234 comes into close contact with the step 218 , the valve passage 206 is closed. That is, the movement of materials through the valve passage 206 is blocked. Specifically, when there is no external force applied to the opening/closing part 234 or when an external force is applied to the opening/closing part 234 in the direction of the lower hole 214 of the first hollow 212, the opening/closing part 234 opens the first hollow ( 212) to block the movement of materials. That is, the opening/closing unit 234 blocks the movement of materials in the same direction as F1.

As shown in FIG. 14 , when the material moves in the F2 direction, the opening/closing part 234 is deformed as indicated by an arrow R. Therefore, when the opening/closing part 24 is separated from the step 218, a gap is generated between the opening/closing part 234 and the opening/closing body 210. Thus, the valve passage 206 can be opened. That is, as indicated by the arrow F3, the movement of the material through the valve passage 206 becomes possible. Specifically, when an external force is applied to the opening and closing part 234 in the direction of the upper hole 216 of the first hollow 212 (in the direction of the second hollow 222), the opening and closing part 234 moves in the direction of the upper hole 216 can be folded into Thus, a gap is created between the opening and closing part 234 and the opening and closing body 210, and the valve passage 206 can be opened.

<Operation of the piston 1 according to the embodiment>

15 is a view showing the piston 1 according to an embodiment of the present invention, showing a state in which no external force is applied.

In a state where no external force is applied, the elastic member 300 elastically biases the weight 400 in an upward direction and elastically biases the opening/closing member 200 in a downward direction. Thus, the opening/closing member 200 closely adheres to the bottom surface of the mounting space 102 . At the same time, the outer periphery of the opening/closing member 200 may come into close contact with the inner periphery of the mounting space 102 (the inner periphery of the pipe member 130). Therefore, a gap does not occur between the opening and closing member 200 and the main body 100, and the flow of material through the piston 1 is blocked.

16 is a view showing the piston 1 according to an embodiment of the present invention, showing a state in which centrifugal force is applied.

When a downward centrifugal force is applied as indicated by arrow F, the piston 1 receives the centrifugal force and displaces downward. Accordingly, the material under the piston 1 is pressed by the piston 1, and the material pressed by the piston 1 presses the opening/closing member 200 upward. The opening/closing member 200 pressed upward is displaced upward, and accordingly, when the opening/closing member 200 reaches the position where the slit 104 is located, there is a gap between the opening/closing member 200 and the main body 100. open Accordingly, the material may flow through the slit 104 as indicated by the arrow W.

At this time, as described above, the weight 400 inside the main body 100 receives downward centrifugal force and presses the opening and closing member 200 downward. Accordingly, the weight 400 may control upward displacement of the opening/closing member 200 by pressing the elastic member 300 . For example, when the mass of the weight 400 is large, since the centrifugal force acting on the weight 400 increases, the elastic member 300 is pressed more. That is, when the mass of the weight 400 is greater than when the mass of the weight 400 is small when the same centrifugal force is applied, the lifting displacement width of the opening/closing member 200 can be reduced.

17 is a view showing a piston 1 according to an embodiment of the present invention, showing a state in which the piston 1 is pressed downward by pressing it.

For example, a case in which some substances are discharged by pressing the piston 1 downward may be considered. At this time, as shown by the arrow P, when the piston 1 is pressed downward, it displaces downward. Accordingly, the material under the piston 1 is pressed by the piston 1, and the material pressed by the piston 1 presses the opening/closing member 200 upward. The opening/closing member 200 pressed upward is displaced upward, and accordingly, when the opening/closing member 200 reaches the position where the slit 104 is located, there is a gap between the opening/closing member 200 and the main body 100. open Accordingly, the material may flow through the slit 104 as indicated by the arrow W.

Since there is no external force acting separately on the weight 400, the weight 400 does not have a separate displacement.

Fig. 18 is a view showing a case where a cleaning liquid or the like is injected into the piston 1 having the opening/closing member 200 having the one-way valve 208. In FIG. 18 , the opening/closing member 200 is mounted in such a way that the one-way valve 208 is freely opened for downward movement of substances and blocks upward movement of substances. That is, the opening/closing part 234 is in a state where it can be bent and deformed in a downward direction.

When the opening and closing member 200 is mounted in the main body 100 in a state where the opening and closing part 234 is foldable and deformable in the downward direction, the material passes through the one-way valve 208 and moves from top to bottom of the piston 1, down. can move in either direction. That is, the material can move freely as indicated by the arrows W1 and W2. Therefore, it is possible to simply inject the cleaning liquid or the like from the top to the bottom of the piston 1. At this time, since the through hole 420 is formed in the weight 400, the injection of the washing liquid or the like is not hindered.

FIG. 19 is a view showing material passing from bottom to top with respect to the piston 1 with the opening/closing member 200 with the one-way valve 208. FIG. In FIG. 18 , the opening/closing member 200 is mounted in such a way that the one-way valve 208 is freely opened for upward movement of substances and blocks downward movement of substances. That is, the opening/closing part 234 is in a state where it can be bent and deformed in an upward direction.

As shown in FIG. 19, when the opening and closing member 200 is mounted in the main body 100 in a state in which the opening and closing portion 234 can be folded and deformed in an upward direction, the material passes through the one-way valve 208 and the piston (1) It becomes possible to move from bottom to top and upward. That is, the material can move freely as indicated by the arrows W1 and W2.

For example, after performing centrifugal separation in a state in which a pressing member (not shown) such as a separate lid is installed on the piston 1 to prevent the opening and closing portion 234 from being unnecessarily opened and closed, the pressing member ( After removing the (not shown), installing a member such as a handle on the piston 1, and pressing the piston 1, the separated material can be discharged upward.

Meanwhile, in this case, the pressing member (not shown) may be installed on the upper portion of the main body 100 of the piston 1.

<Effect of the present invention>

According to the embodiment of the present invention, the detailed opening and closing of the opening and closing member 200 inside the piston 1 is possible.

According to the embodiment of the present invention, by selecting the mass of the weight 400, the upward displacement width of the opening and closing member 200 can be easily selected under the same centrifugal force, and the opening width of the slit 104 can be finely adjusted. can

According to an embodiment of the present invention, when the material located in the upper layer and the material located in the lower layer are separated by centrifugal separation, contamination due to air exposure can be prevented.

According to an embodiment of the present invention, the piston 1 pressurizes the separated material by centrifugal force, so that the yield and purity of the desired material can be improved.

According to an embodiment of the present invention, the separated material is not separately transferred to another container, and, if necessary, an external material, etc. (eg, additives, washing liquid, etc.) is provided to the material in a situation where the separated material is kept sealed, or The separated material can be discharged freely. That is, the free opening and closing of the piston 1 is possible. Accordingly, cleaning fluid, substances, etc. can be freely moved in one direction through the piston. In addition, the movement restriction direction and the free movement direction of the material can be freely selected.

Although preferred embodiments have been shown and described above, the present invention is not limited to the specific embodiments described above, and ordinary knowledge in the art to which the present invention belongs without departing from the gist of the present invention claimed in the claims Of course, various modifications are possible by the possessor, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

1: Piston
100: main body
102: mounting space
104: slit
106 upper through hole
108: lower through hole
110: upper body
120: lower body
130: pipe member
140: outer seal ring
150: inner seal ring
200: opening and closing member
202: body part
204: sealing part
206: valve flow path
208: one-way valve
210: opening and closing body
212: first hollow
214: lower hole
216: upper hole
218: step
220: fitting ring
222: second hollow
230: elastic panel
232 outer ring
234: opening and closing part
300: elastic member
400: weight
410: slit line
420: through hole

Claims (10)

A main body having a mounting space through which the upper and lower directions pass;
an opening and closing member mounted within the mounting space; and
an elastic member mounted in the mounting space and elastically biasing the opening/closing member in a downward direction; Including,
The main body,
A slit provided on an inner circumferential surface portion of the mounting space and extending in a vertical direction;
When the opening and closing member is positioned below the slit, the outer circumferential surface of the opening and closing member is in close contact with the circumferential surface portion of the mounting space,
When the opening and closing member is positioned at a height overlapping the slit, the material is distributed between the slit and the opening and closing member. According to claim 1,
Further comprising a weight weight mounted in the mounting space and having a predetermined mass,
The weight is located on the elastic member in the mounting space,
When a centrifugal force is applied to the piston in a downward direction, the piston changes position in the downward direction of the weight. According to claim 2,
the weight,
A through hole formed on the inside and penetrating vertically, and
A piston including at least one of slit lines formed on the outside and extending vertically. According to claim 1,
The opening and closing member,
Includes a one-way valve;
The one-way valve is closed in one direction and open in the opposite direction, restricting the upward or downward flow of the piston. According to claim 4,
The opening and closing member,
The mounting direction mounted in the mounting space is selectively variable,
A piston in which upward flow restriction or downward flow restriction of the material is selectively made by the one-way valve. According to claim 4,
The one-way valve,
A valve passage penetrating the opening and closing member in the vertical direction, and
An elastic panel disposed in the valve passage and opening and closing the valve passage,
A piston in which the opening and closing of the valve passage is performed according to the restoration and deformation of the elastic panel. According to claim 6,
The valve passage has a lower hole and an upper hole having different cross-sectional areas,
A step is formed between the upper hole and the lower hole,
At least one portion of the elastic panel is fixed within the valve passage, and at least one portion is positioned to be in close contact with the step,
When the elastic panel comes into close contact with the step, the valve passage is closed.
A piston in which the valve passage is opened when the elastic panel is deformed and the elastic panel is spaced apart from the level difference. According to claim 7,
The elastic panel,
an outer ring, and
A piston including an opening/closing portion positioned inside the outer ring and having one end connected to the outer ring to be bent/restored. According to claim 1,
The main body,
An upper body constituting an upper part of the main body, and
It constitutes a lower part of the main body and includes a lower body with a space formed therein,
The upper body and the lower body are separable from each other,
A piston in which the mounting space is opened when the upper body and the lower body are separated. According to claim 9,
The main body,
It is mounted in the space and includes a pipe member having a hollow,
The hollow of the pipe member forms the mounting space,
A piston in which the slit is formed on an inner surface of the pipe member.

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