A filter sleeve

Abstract

The utility model discloses a filter sleeve, which relates to the technical field of filter tubes, and comprises a sleeve body and a filter membrane arranged in the sleeve body, wherein the sleeve body is composed of two half-tube bodies, a flow channel groove is arranged on the lower inner wall of the half-tube body, a liquid outlet hole is arranged below the flow channel groove on the half-tube body, and the filter membrane is arranged on the inner wall of the half-tube body, and the flow channel groove and the liquid outlet hole are both located outside the filter membrane. The filter membrane of this scheme is not easy to be damaged during the production process, and the product qualification rate is improved; the production mold and the production cost are optimized, so that the production cost of the filter sleeve in this scheme is reduced, and the manufacturing difficulty is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of filter tube technology, and in particular to a filter sleeve. Background Technology

[0002] In current laboratory filtration processes, centrifugal filter sleeves are commonly used for separation. To improve the centrifugal separation efficiency, membrane filtration is used for further separation and concentration of the liquid. Membranes are available in various specifications on the market, offering good applicability. In the actual production of filter sleeves, different specifications of membranes are designed for filter sleeves with different needs, allowing for selection based on specific requirements during centrifugal separation.

[0003] The existing filter sleeve requires multiple processes to manufacture: first, the filter membrane is fixed on the filter membrane holder, and then the filter membrane holder is used to set it on both sides of the filter sleeve. During the connection process, the extremely close proximity to the filter membrane can easily cause damage to the filter membrane, resulting in a low product qualification rate. Multiple different molds are required to produce the filter sleeve and filter membrane holder, which results in high production costs.

[0004] For example, Chinese Patent Publication No. CN219186482U, published on June 16, 2023, entitled "A Purification and Concentration Device", includes an end cap and a material tank tube. The material tank tube is provided with a filter tube, and the lower end of the filter tube is provided with several openings. A filter membrane and a filter membrane support are arranged in sequence on the outside of each opening. The filter membrane is fixedly connected to the filter tube, and the filter membrane support is snapped onto the filter tube. The outside of the opening of the filter tube is provided with a stepped inner groove.

[0005] The disadvantages of the existing patent are: the existing filter sleeve sets the filter membrane on both sides of the filter sleeve through the filter membrane fixing frame, which can easily cause damage to the filter membrane during the production process, resulting in a low product qualification rate; and the production of this filter sleeve requires multiple different molds, resulting in high production costs. Utility Model Content

[0006] The purpose of this invention is to solve the problems that existing filter sleeve structures cause filter membranes to be easily damaged during production and require multiple different molds, resulting in high production costs. The invention provides a filter sleeve that makes the filter membrane less prone to damage during production and reduces production costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A filter sleeve includes a sleeve body and a filter membrane disposed within the sleeve body. The sleeve body is composed of two joined halves of a tube. A flow channel groove is provided on the lower inner wall of each half of the tube, and a liquid outlet is located below the flow channel groove on each half of the tube. The filter membrane is disposed on the inner wall of the half of the tube, with both the flow channel groove and the liquid outlet located on the outer side of the filter membrane. The filter sleeve described in this embodiment is a hollow sleeve body formed by two joined halves of a tube. A flow channel groove is provided on the lower inner wall of each half of the tube, and the liquid outlet communicates with the lower end of the flow channel groove. Biological samples to be centrifuged are placed in the filter sleeve. Under centrifugal force, the samples pass through the filter membrane into the flow channel groove and then exit through the liquid outlet.

[0009] The semi-tube body, flow channel groove, and liquid outlet hole are integrally formed. Compared with the existing structure in which the filter membrane fixing frame and filter sleeve are connected, the structure of this solution is more robust. The thickness of the flow channel groove at the bottom of the semi-tube body is thinner, but it does not affect the strength of the filter sleeve itself.

[0010] The filter membrane is disposed at the lower part of the half-tube. After the filter membrane is disposed, the half-tubes are joined together. There is a certain distance between the mating surfaces of the two half-tubes and the filter membrane. Compared with the prior art where the filter membrane is installed on the filter membrane support and then installed on both sides of the filter sleeve, the filter membrane in this solution is less affected during the production process and is less prone to damage.

[0011] This solution only requires one mold to produce the half-tube body. Compared with the existing technology that requires multiple molds to produce filter sleeves, filter membrane holders, etc., this solution optimizes the production mold and production cost, thereby reducing the production cost of the filter sleeve and effectively reducing the manufacturing difficulty.

[0012] Preferably, one half-tube has a groove on its mating surface, and the other half-tube has a connector on its mating surface. The two half-tubes are connected by the groove and connector. Alternatively, one half-tube has a groove on its mating surface, and the other half-tube has a connector that mates with the groove. The groove and connector are then connected. After the two half-tubes are connected by the connector and groove, they are ultrasonically or laser welded together, resulting in a seamless seal and excellent pressure resistance. The half-tubes with the connector and groove can still be manufactured using the same tool, by simply replacing the corresponding parts, thus reducing the production cost of the filter sleeve in this design and effectively simplifying manufacturing.

[0013] Preferably, the inner wall of the semi-tube is provided with an annular sealing portion, and the filter membrane is disposed on the inner wall of the semi-tube through the annular sealing portion. The flow channel and the outlet hole are both located within the annular sealing portion. The annular sealing portion is annular, and the filter membrane annularly seals the interior of the annular sealing portion, so that the flow channel and the outlet hole are both located on the outside of the filter membrane. The biological sample to be centrifuged is placed in the filter tube, and under the action of centrifugal force, it passes through the filter membrane into the flow channel and then exits through the outlet hole.

[0014] Preferably, the outer wall of the semi-tube is provided with a concave groove, one end of the liquid outlet is connected to the flow channel groove, and the other end is connected to the concave groove. The concave groove structure reduces the outflow resistance and the processing difficulty of the liquid outlet.

[0015] Preferably, there are multiple liquid outlet holes, which are connected to the flow channel. All liquid outlet holes are located at the lower end of the flow channel.

[0016] Preferably, the liquid outlet is a waist-shaped hole, and the waist-shaped hole is vertically arranged.

[0017] Preferably, the oblong holes are staggered in the horizontal direction. The oblong holes are also staggered in height in the horizontal direction, with one oblong hole being higher or lower than the height of the adjacent oblong hole. This staggered arrangement reduces outflow resistance.

[0018] Preferably, the filter membrane is fixed to the inner wall of the semi-tube by welding, fusion welding, or bonding. Further, the filter membrane is fixed to the annular sealing portion of the semi-tube by welding, fusion welding, or bonding.

[0019] Preferably, the mating joint of the two half-tubes is achieved through ultrasonic welding or laser welding. This results in better sealing and pressure resistance for the half-tubes.

[0020] Preferably, the outer wall of the sleeve body is provided with graduation lines. Graduation lines help operators to control the amount of sample added during separation.

[0021] Therefore, this utility model has the following beneficial effects: the filter membrane is not easily damaged during the production process, which improves the product qualification rate; the production cost is reduced, and the manufacturing difficulty is effectively reduced. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a partial sectional view of the present invention.

[0024] Figure 3 yes Figure 2 A cross-sectional view at point AA.

[0025] Figure 4 yes Figure 2 A cross-sectional view at point BB.

[0026] Figure 5 This is a magnified view of a portion of the joint between the two half-tubes in Example 1.

[0027] Figure 6 This is another enlarged view of the joint of the two half-tubes in Example 2.

[0028] Figure 7 This is another enlarged view of the joint of the two half-tubes in Example 2.

[0029] Figure 8 This is another enlarged view of the joint of the two half-tubes in Example 2.

[0030] Figure 9 This is another enlarged view of the joint of the two half-tubes in Example 2.

[0031] Figure 10 This is another enlarged view of the joint of the two half-tubes in Example 2.

[0032] As shown in the picture:

[0033] 1. Half-pipe body, 1.1. Flow channel groove, 1.2. Liquid outlet hole, 1.3. Insert groove, 1.4. Insert connector, 1.5. Annular sealing part, 1.6. Recessed groove.

[0034] Filter membrane 2, graduation lines 3. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 5 The filter sleeve shown includes a sleeve body and a filter membrane 2 disposed inside the sleeve body. The sleeve body is composed of two half-tubes 1 joined together. A flow channel groove 1.1 is provided on the lower inner wall of the half-tube 1, and an outlet hole 1.2 is provided below the flow channel groove 1.1 on the upper half-tube 1. The filter membrane 2 is disposed on the inner wall of the half-tube 1, and both the flow channel groove 1.1 and the outlet hole 1.2 are located on the outer side of the filter membrane 2.

[0037] The filter sleeve described in the above embodiment consists of two half-tubes 1 joined together to form a hollow sleeve body. A flow channel 1.1 is provided on the lower inner wall of the half-tube 1, and the outlet hole 1.2 communicates with the lower end of the flow channel 1.1. The biological sample to be centrifuged is placed in the filter sleeve. Under the action of centrifugal force, it passes through the filter membrane 2 into the flow channel 1.1, and then exits through the outlet hole 1.2.

[0038] The semi-tube body 1, the flow channel groove 1.1 and the liquid outlet hole 1.2 are integrally formed. Compared with the structure of the filter membrane 2 fixing frame and the filter sleeve in the prior art, the structure of this solution is more robust. The thickness of the flow channel groove 1.1 at the lower part of the semi-tube body 1 is thinner, but it does not affect the strength of the filter sleeve itself.

[0039] The filter membrane 2 is disposed at the lower part of the half-tube 1. After the filter membrane 2 is disposed, the half-tube 1 is joined together. There is a certain distance between the mating surfaces of the two half-tube 1 and the filter membrane 2. Compared with the prior art where the filter membrane 2 is installed on the filter membrane 2 support and then installed on both sides of the filter sleeve, the filter membrane 2 in this solution is less affected during the production process and is less prone to damage.

[0040] This solution requires only one mold to produce the half-tube 1. Compared to existing technologies that require multiple molds to produce the filter sleeve and filter membrane 2 fixing bracket, this solution optimizes the production mold and production costs, reducing the production cost of the filter sleeve and effectively lowering the manufacturing difficulty. It solves the problems of existing filter sleeves where the filter membrane 2 is fixed on both sides of the filter sleeve via the filter membrane 2 fixing bracket, which easily damages the filter membrane 2 during production, resulting in a low product qualification rate; and the need for multiple different molds to produce this filter sleeve, leading to higher production costs.

[0041] Furthermore, such as Figure 2 , Figure 3 As shown, an annular sealing portion 1.5 is provided on the inner wall of the semi-tube 1. The filter membrane 2 is disposed on the inner wall of the semi-tube 1 through the annular sealing portion 1.5. The flow channel 1.1 and the outlet hole 1.2 are both located within the annular sealing portion 1.5. The annular sealing portion 1.5 is annular, and the filter membrane 2 annularly seals the interior of the annular sealing portion 1.5, so that the flow channel 1.1 and the outlet hole 1.2 are both located outside the filter membrane 2. The biological sample to be centrifuged is placed in the filter tube. Under the action of centrifugal force, it passes through the filter membrane 2 into the flow channel 1.1, and then exits through the outlet hole 1.2.

[0042] Furthermore, such as Figure 1 As shown, a concave-flat groove 1.6 is provided on the outer wall of the semi-tube 1. One end of the liquid outlet 1.2 is connected to the flow channel groove 1.1, and the other end is connected to the concave-flat groove 1.6. The structure of the concave-flat groove 1.6 reduces the outflow resistance and the machining difficulty of the liquid outlet 1.2. Figure 1 , Figure 2 , Figure 3 As shown, there are multiple liquid outlet holes 1.2, and each liquid outlet hole 1.2 is connected to the flow channel 1.1. All liquid outlet holes 1.2 are located at the lower end of the flow channel 1.1. Each liquid outlet hole 1.2 is an oblong hole, and the oblong holes are vertically arranged.

[0043] Furthermore, such as Figure 3 As shown, the waist-shaped holes are staggered in the horizontal direction. The waist-shaped holes are also staggered in height in the horizontal direction, with the height of one waist-shaped hole being higher or lower than the height of the adjacent waist-shaped hole. This staggered arrangement reduces outflow resistance.

[0044] Specifically, the filter membrane 2 is fixed to the inner wall of the semi-tube 1 by welding, fusion welding, or bonding. Further, the filter membrane 2 is fixed to the annular sealing portion 1.5 of the semi-tube 1 by welding, fusion welding, or bonding. The mating joint of the two semi-tubes 1 is achieved by ultrasonic welding or laser welding. This improves the sealing and pressure resistance of the semi-tubes 1.

[0045] Furthermore, such as Figure 1 As shown, the outer wall of the sleeve body is provided with graduation lines 3. The graduation lines 3 help the operator to control the amount of sample added during separation.

[0046] The present invention has the following advantages: the filter membrane 2 is not easily damaged during the production process, thus improving the product qualification rate; the production cost is reduced, and the manufacturing difficulty is effectively reduced.

[0047] Example 2, as Figure 4 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The illustrated filter sleeve includes a sleeve body and a filter membrane 2 disposed within the sleeve body. The sleeve body is composed of two interlocking half-tubes 1. A flow channel groove 1.1 is provided on the lower inner wall of each half-tube 1, and a liquid outlet hole 1.2 is located below the flow channel groove 1.1 on each half-tube 1. The filter membrane 2 is disposed on the inner wall of each half-tube 1, with both the flow channel groove 1.1 and the liquid outlet hole 1.2 located on the outer side of the filter membrane 2. One half-tube 1 has an insertion groove 1.3 on its mating surface, and the other half-tube 1 has an insertion connector 1.4 on its mating surface. The two half-tubes 1 are interlocked via the insertion groove 1.3 and the insertion connector 1.4.

[0048] In the above embodiment, one half-tube 1 has a insertion groove 1.3 on its mating surface, and the other half-tube 1 has an insertion piece 1.4 that mates with the insertion groove 1.3 on its mating surface. The insertion groove 1.3 and the insertion piece 1.4 are inserted into each other. After the two half-tubes 1 are inserted through the insertion piece 1.4 and the insertion groove 1.3, they are formed by ultrasonic or laser welding, resulting in a fused, integrated seal and good pressure resistance. The half-tube 1 with the insertion piece 1.4 and the insertion groove 1.3 can still be produced using the same tool, by simply replacing the corresponding parts, thus reducing the production cost of the filter sleeve in this solution and effectively reducing manufacturing difficulty.

[0049] The connector 1.4 and the connector slot 1.3 have various structures, such as... Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, but not limited to, the five methods in this solution, the plug-in structure has different implementation methods:

[0050] Plug-in structure one: such as Figure 6 As shown, the cross-sectional area of ​​the connector 1.4 is triangular. One half-pipe 1 has a triangular cross-section connector 1.4 on its mating surface, and the other half-pipe 1 has a triangular cross-section insertion groove 1.3 on its mating surface. The connector 1.4 is inserted into the insertion groove 1.3. The mating point of the two half-pipes 1 is formed by ultrasonic welding or laser welding.

[0051] Plug-in structure two: such as Figure 7 As shown, the cross-sectional area of ​​the connector 1.4 is rectangular. One half-tube 1 has a rectangular cross-section connector 1.4 on its mating surface, and the other half-tube 1 has a rectangular cross-section connector groove 1.3 on its mating surface. The connector 1.4 is inserted into the connector groove 1.3. The mating point of the two half-tubes 1 is welded by ultrasonic welding or laser welding.

[0052] Plug-in structure three: such as Figure 8 As shown, the cross-sectional area of ​​the connector 1.4 is multiple triangles. One half-tube 1 has multiple triangular-section connectors 1.4 on its mating surface, and the other half-tube 1 has multiple triangular-section insertion slots 1.3 on its mating surface. The connectors 1.4 are inserted into the insertion slots 1.3. The mating joint of the two half-tubes 1 is achieved through ultrasonic welding or laser welding. The multiple connectors engaging with the insertion slots 1.3 strengthen the connection between the two half-tubes 1.

[0053] Plug-in structure four: such as Figure 9As shown, the connector 1.4 has a U-shaped cross-section. One half-tube 1 has a U-shaped connector 1.4 on its mating surface, and the other half-tube 1 has a U-shaped insertion groove 1.3 on its mating surface. The connector 1.4 is inserted into the insertion groove 1.3. The mating joint of the two half-tubes 1 is achieved through ultrasonic welding or laser welding. The U-shaped connector 1.4 and insertion groove 1.3, when fitted together, reduce the problem of corner gaps preventing connection at the mating joint of the two half-tubes 1, further increasing the contact area at the mating joint and improving the connection strength.

[0054] Plug-in structure five: such as Figure 10 As shown, one of the half-pipes 1 has a plug-in block on the outer side of its mating surface, and the other half-pipe 1 has a plug-in block on the inner side of its mating surface. The plug-in block located on the inner side of the mating surface forms a plug-in groove 1.3 with the mating surface. The plug-in block on the outer side of the mating surface of one half-pipe 1 clamps the plug-in block on the inner side of the mating surface of the other half-pipe 1, making the structure of the two half-pipes 1 more robust.

[0055] In this embodiment, the insertion structure on the half-tube 1 adopts one or more combinations of the above-mentioned insertion structures.

[0056] The filter sleeve described in the above embodiment consists of two half-tubes 1 joined together to form a hollow sleeve body. A flow channel 1.1 is provided on the lower inner wall of the half-tube 1, and the outlet hole 1.2 communicates with the lower end of the flow channel 1.1. The biological sample to be centrifuged is placed in the filter sleeve. Under the action of centrifugal force, it passes through the filter membrane 2 into the flow channel 1.1, and then exits through the outlet hole 1.2.

[0057] The semi-tube body 1, the flow channel groove 1.1 and the liquid outlet hole 1.2 are integrally formed. Compared with the structure of the filter membrane 2 fixing frame and the filter sleeve in the prior art, the structure of this solution is more robust. The thickness of the flow channel groove 1.1 at the lower part of the semi-tube body 1 is thinner, but it does not affect the strength of the filter sleeve itself.

[0058] The filter membrane 2 is disposed at the lower part of the half-tube 1. After the filter membrane 2 is disposed, the half-tube 1 is joined together. There is a certain distance between the mating surfaces of the two half-tube 1 and the filter membrane 2. Compared with the prior art where the filter membrane 2 is installed on the filter membrane 2 support and then installed on both sides of the filter sleeve, the filter membrane 2 in this solution is less affected during the production process and is less prone to damage.

[0059] This solution requires only one mold to produce the half-tube 1. Compared to existing technologies that require multiple molds to produce the filter sleeve and filter membrane 2 fixing bracket, this solution optimizes the production mold and production costs, reducing the production cost of the filter sleeve and effectively lowering the manufacturing difficulty. It solves the problems of existing filter sleeves where the filter membrane 2 is fixed on both sides of the filter sleeve via the filter membrane 2 fixing bracket, which easily damages the filter membrane 2 during production, resulting in a low product qualification rate; and the need for multiple different molds to produce this filter sleeve, leading to higher production costs.

[0060] Furthermore, such as Figure 2 , Figure 3 As shown, an annular sealing portion 1.5 is provided on the inner wall of the semi-tube 1. The filter membrane 2 is disposed on the inner wall of the semi-tube 1 through the annular sealing portion 1.5. The flow channel 1.1 and the outlet hole 1.2 are both located within the annular sealing portion 1.5. The annular sealing portion 1.5 is annular, and the filter membrane 2 annularly seals the interior of the annular sealing portion 1.5, so that the flow channel 1.1 and the outlet hole 1.2 are both located outside the filter membrane 2. The biological sample to be centrifuged is placed in the filter tube. Under the action of centrifugal force, it passes through the filter membrane 2 into the flow channel 1.1, and then exits through the outlet hole 1.2.

[0061] Furthermore, such as Figure 1 As shown, a concave-flat groove 1.6 is provided on the outer wall of the semi-tube 1. One end of the liquid outlet 1.2 is connected to the flow channel groove 1.1, and the other end is connected to the concave-flat groove 1.6. The structure of the concave-flat groove 1.6 reduces the outflow resistance and the machining difficulty of the liquid outlet 1.2. Figure 1 , Figure 2 , Figure 3 As shown, there are multiple liquid outlet holes 1.2, and each liquid outlet hole 1.2 is connected to the flow channel 1.1. All liquid outlet holes 1.2 are located at the lower end of the flow channel 1.1. Each liquid outlet hole 1.2 is an oblong hole, and the oblong holes are vertically arranged.

[0062] Furthermore, such as Figure 3 As shown, the waist-shaped holes are staggered in the horizontal direction. The waist-shaped holes are also staggered in height in the horizontal direction, with the height of one waist-shaped hole being higher or lower than the height of the adjacent waist-shaped hole. This staggered arrangement reduces outflow resistance.

[0063] Specifically, the filter membrane 2 is fixed to the inner wall of the semi-tube 1 by welding, fusion welding, or bonding. Further, the filter membrane 2 is fixed to the annular sealing portion 1.5 of the semi-tube 1 by welding, fusion welding, or bonding. The mating joint of the two semi-tubes 1 is achieved by ultrasonic welding or laser welding. This improves the sealing and pressure resistance of the semi-tubes 1.

[0064] Furthermore, such as Figure 1As shown, the outer wall of the sleeve body is provided with graduation lines 3. The graduation lines 3 help the operator to control the amount of sample added during separation.

[0065] The specific embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the specific scope of implementation of this utility model. All equivalent changes made to the shape and structure of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter sleeve, comprising a sleeve body and a filter membrane arranged in the sleeve body, characterized in that: The sleeve body is composed of two half-tubes, a flow channel groove is provided on the lower inner wall of the half-tube, a liquid outlet is provided below the flow channel groove on the half-tube, the filter membrane is arranged on the inner wall of the half-tube, and the flow channel groove and the liquid outlet are both located outside the filter membrane.

2. A filter sleeve according to claim 1, characterized in that A plug-in groove is arranged on the mating surface of one half-tube body, and a plug-in connector is arranged on the mating surface of the other half-tube body. The two half-tube bodies are plug-fitted through the plug-in groove and the plug-in connector.

3. A filter sleeve according to claim 1 or 2, characterized in that: An annular sealing portion is provided on the inner wall of the semi-tube body, the filter membrane is arranged on the inner wall of the semi-tube body through the annular sealing portion, and the flow channel groove and the liquid outlet hole are both located in the annular sealing portion.

4. A filter sleeve according to claim 1, characterized in that: A concave flat groove is arranged on the outer side wall of the semi-tube body, one end of the liquid outlet hole is connected to the flow channel groove, and the other end is connected to the concave flat groove.

5. A filter sleeve according to claim 1, 2 or 4, characterized in that: There are multiple liquid outlet holes, and the liquid outlet holes are connected to the flow channel groove.

6. A filter sleeve according to claim 5, characterized in that: The liquid outlet hole is a waist-shaped hole, and the waist-shaped hole is vertically arranged.

7. A filter sleeve according to claim 6, characterized in that: The waist-shaped holes are arranged in a staggered manner in the horizontal direction.

8. A filter sleeve according to claim 1, 2 or 4, characterized in that: The filter membrane is fixed on the inner wall of the semi-tube body by welding, melting or bonding.

9. A filter sleeve according to claim 1, 2 or 4, characterized in that: The joints of the two half-tubes are welded by ultrasonic welding or laser welding.

10. A filter sleeve according to claim 1, 2 or 4, characterized in that: The outer side wall of the sleeve body is provided with scale lines.

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