A glass pasteurized straw stopper filter element

Abstract

This utility model relates to the field of straw filtration technology, specifically to a glass Pasteur straw stopper filter element, including a filter element shell and a filter element inner shell. The filter element inner shell is fixedly disposed inside the filter element shell, and a cavity is provided between the filter element shell and the filter element inner shell. A limiting block is fixedly disposed on the outside of the filter element shell, and the limiting block is disposed on the top of the filter element shell. A water outlet plate is slidably disposed inside the filter element shell. An annular baffle is fixedly disposed on the inner wall of the filter element shell. Several liquid-drawing barrier outer plates are fixedly disposed on the inner wall of the filter element shell, and several liquid-drawing barrier inner plates are fixedly disposed on the outside of the filter element inner shell. The liquid-drawing barrier outer plates and liquid-drawing barrier inner plates are configured as annular structures. A liquid outlet baffle is slidably disposed inside the filter element inner shell, and a water intake port is provided at the lower end of the filter element inner shell. The water intake port is disposed in a funnel-shaped hollow structure. This utility model can solve the problems of unstable filtration and secondary pollution by setting up the filter element limiting plate, liquid outlet baffle, and water outlet plate.

Description

Technical Field

[0001] This utility model relates to the field of straw filtration technology, specifically a glass Pasteur straw stopper filter element. Background Technology

[0002] Glass pasteurized pipettes are a fundamental tool for laboratory liquid transfer and are widely used in fields such as biological sample processing, chemical analysis, and clinical testing. Their matching filter cartridges are key components for ensuring the purity of the liquid.

[0003] In the filtration process, traditional filter cartridges often use a single filter layer for simple filling. Without a fixed, directly filled filter layer, the filter layer is prone to displacement when liquid is extracted, causing liquid to flow out from the gaps and resulting in incomplete filtration. In the drainage process, the directly filled filter layer causes the liquid to pass through the filter layer again when it flows back, mixing with the unfiltered liquid below and causing secondary pollution.

[0004] Therefore, a glass Pasteur straw filter element is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a glass pasteurized straw filter element that can solve the problems of unstable filtration and secondary pollution.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a filter element outer shell and a filter element inner shell. The filter element inner shell is fixedly disposed inside the filter element outer shell. A cavity is provided between the filter element outer shell and the filter element inner shell. The upper sections of both the filter element outer shell and the filter element inner shell are hollow cylindrical structures, and the lower sections are conical guide hollow structures. A limiting block is fixedly disposed on the outer side of the filter element outer shell, located at the top of the filter element outer shell. A water outlet plate is slidably disposed inside the filter element outer shell. An annular baffle is fixedly disposed on the inner wall of the filter element outer shell. Several liquid extraction blocking outer plates are fixedly disposed on the inner wall of the filter element outer shell. Several liquid extraction blocking inner plates are fixedly disposed on the outer side of the filter element inner shell. The liquid extraction blocking outer plates and liquid extraction blocking inner plates are circular ring structures. A liquid outlet baffle is slidably disposed inside the filter element inner shell. A water inlet is provided at the lower end of the filter element inner shell, located in a funnel-shaped hollow structure.

[0007] Preferably, a number of connecting rods are fixedly provided on the outer side of the inner shell of the filter element. The connecting rods are distributed in a ring on the outer side of the inner shell of the filter element, and the end of the connecting rod away from the inner shell of the filter element is fixedly connected to the inner wall of the outer shell of the filter element.

[0008] Preferably, the water outlet plate is located inside the cavity between the outer shell and the inner shell of the filter element, the water outlet plate is located above the connecting rod, and several connecting posts are fixedly installed at the lower end of the water outlet plate.

[0009] Preferably, the connecting column is disposed between adjacent connecting rods, and a liquid extraction baffle is fixedly disposed at the lower end of the connecting column. A gap is left between the outer side of the liquid extraction baffle and the inner wall of the filter element shell, and the inner side of the liquid extraction baffle is attached to the outer side of the filter element inner shell.

[0010] Preferably, the annular baffle is disposed between the liquid extraction baffle and the connecting rod, with a certain gap between the inner side of the annular baffle and the outer side of the filter element inner shell, and the annular baffle is sleeved on the outside of several connecting columns.

[0011] Preferably, the liquid-absorbing barrier outer plate is linearly distributed on the inner wall of the filter element shell, and the liquid-absorbing barrier outer plate is set above the water outlet plate. A certain gap is left between the inner side of the liquid-absorbing barrier outer plate and the outer side of the filter element inner shell. The inner diameter of the liquid-absorbing barrier outer plate is defined as L. The liquid-absorbing barrier inner plate is linearly distributed on the outer side of the filter element inner shell. A certain gap is left between the outer side of the liquid-absorbing barrier inner plate and the inner wall of the filter element shell. The outer diameter of the liquid-absorbing barrier inner plate is defined as R, and R>L.

[0012] Preferably, at least two filter element limiting plates are fixedly provided on the inner wall of the filter element inner shell. The filter element limiting plates are configured as annular structures, and a filter layer is filled between the two filter element limiting plates. An outlet baffle is disposed above the filter element limiting plates. A certain gap is left between the outer side of the outlet baffle and the inner wall of the filter element inner shell. The main body of the outlet baffle is configured as a cylindrical structure, and the diameter of the main body of the outlet baffle is larger than the inner diameter of the filter element limiting plates.

[0013] Compared with the prior art, this utility model provides a glass pasteurized straw stopper filter element, which has the following beneficial effects: 1. This utility model provides filter element limiting plates with at least two circular ring structures on the inner wall of the filter element shell, with a filter layer filling between them. This achieves the beneficial effects of fixing the filter layer, preventing it from flowing with the liquid, ensuring filtration stability, and improving the efficiency of impurity removal.

[0014] 2. This utility model achieves the beneficial effect of using a filter element limiting plate and a liquid outlet baffle that are slidably installed inside the inner shell. When the liquid is sucked up, it is pushed upward by the suction force and water flow, causing the liquid to flow into the upper part of the suction tube. When the liquid is discharged, it is pushed downward by the blowing force and liquid, blocking the flow space of the inner shell, thus preventing the filtered liquid from being contaminated again by the filter layer.

[0015] 3. This utility model achieves the effect of blocking when absorbing liquid and allowing flow when draining liquid by setting a sliding structure consisting of a water outlet plate, a connecting column, a liquid extraction baffle and an annular baffle in the cavity between the outer shell and the inner shell, as well as staggered liquid extraction blocking outer and inner plates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the glass Pasteur straw filter element proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of the outer shell of the glass Pasteur straw filter element proposed in this utility model; Figure 3 This is a schematic diagram of the internal structure of the glass Pasteur straw filter element proposed in this utility model. Figure 4 This is a schematic diagram of the water inlet structure of the glass Pasteur straw filter element proposed in this utility model.

[0017] In the diagram: 1. Filter cartridge outer shell; 2. Filter cartridge inner shell; 3. Limiting block; 4. Connecting rod; 5. Water outlet plate; 6. Connecting column; 7. Liquid extraction baffle; 8. Liquid extraction barrier outer plate; 9. Liquid extraction barrier inner plate; 10. Water inlet; 11. Filter cartridge limiting plate; 12. Filter layer; 13. Liquid outlet baffle; 14. Annular baffle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Please see Figure 1 - Figure 4 This embodiment of a glass Pasteur straw stopper filter element includes a filter element outer shell 1 and a filter element inner shell 2. The filter element inner shell 2 is fixedly disposed inside the filter element outer shell 1, and a cavity is provided between the filter element outer shell 1 and the filter element inner shell 2. The upper sections of the filter element outer shell 1 and the filter element inner shell 2 are configured as hollow cylindrical structures, and the lower sections of the filter element outer shell 1 and the filter element inner shell 2 are configured as conical guide hollow structures. A limiting block 3 is fixedly disposed on the outside of the filter element outer shell 1, and the limiting block 3 is disposed at the top of the filter element outer shell 1. A water outlet plate 5 is slidably arranged inside the outer shell 1. An annular baffle 14 is fixedly arranged on the inner wall of the filter element outer shell 1. Several liquid extraction blocking outer plates 8 are fixedly arranged on the inner wall of the filter element outer shell 1. Several liquid extraction blocking inner plates 9 are fixedly arranged on the outer side of the filter element inner shell 2. The liquid extraction blocking outer plates 8 and liquid extraction blocking inner plates 9 are set as a ring structure. A liquid outlet baffle 13 is slidably arranged inside the filter element inner shell 2. A water inlet 10 is provided at the lower end of the filter element inner shell 2. The water inlet 10 is set in a funnel-shaped hollow structure. When in use, first insert the tapered structure at the bottom of the filter element into the neck of the Pasteur straw to position it. Then, press down to insert the cylindrical structure on the outer side of the filter element housing 1 into the neck of the Pasteur straw. The outer side of the filter element housing 1 is covered with an elastic material, such as borosilicate glass. When compressed, the filter element is fixed in place by its elastic rebound. After fixing, attach a rubber suction ball to the thicker end of the Pasteur straw. After squeezing, insert it into the liquid to be sucked. Releasing it creates suction. The flared structure of the suction port 10 allows most of the liquid to enter the inner shell 2 of the filter element through the suction port 10. A small portion of the liquid is sucked into the cavity between the filter element housing 1 and the inner shell 2. The liquid flowing into the inner shell 2 passes through the filtration structure. The water flow and the suction generated by the rubber suction ball push the liquid outlet baffle 13 upward, causing the liquid to flow into the upper part of the Pasteur straw. The suction pushes the water outlet plate. 5. Move the device to gradually block the cavity, preventing further liquid from entering. At this point, some liquid is still drawn up to the top of the outlet plate 5. The outer and inner liquid-absorbing plates 8 and 9, which are staggered above the outlet plate 5, create significant resistance to the liquid, causing it to remain in the cavity after the suction process. After suction is complete, gently squeeze the rubber bulb. The liquid at the top of the suction tube, along with the blowing force generated by the rubber bulb, pushes the outlet baffle 13 downwards, blocking the internal flow space of the filter inner shell 2. The blowing force propels the remaining liquid in the cavity downwards, pushing the outlet plate 5, gradually opening the cavity and allowing the remaining liquid to drain. The liquid below the filter layer 12 inside the filter inner shell 2 is also drained from the suction tube due to the blowing force and gravity. Stop squeezing the rubber bulb at this point. Then, move the device to the corresponding collection container, squeeze the rubber bulb, and the filtered liquid flows out of the suction tube from the cavity. The outlet baffle 13 and outlet plate 5 are made of lightweight, waterproof materials, such as carbon fiber composite materials.

[0020] A number of connecting rods 4 are fixedly provided on the outer side of the inner shell 2 of the filter element. The connecting rods 4 are distributed in a ring on the outer side of the inner shell 2 of the filter element, and the end of the connecting rod 4 away from the inner shell 2 of the filter element is fixedly connected to the inner wall of the outer shell 1 of the filter element. The connecting rod 4 ensures that the inner shell 2 of the filter element is stably fixed inside the outer shell 1 of the filter element, thus preventing the liquid flow path from being obstructed due to the displacement of the inner shell 2.

[0021] The water outlet plate 5 is located inside the cavity between the filter element outer shell 1 and the filter element inner shell 2. The water outlet plate 5 is located above the connecting rod 4. Several connecting posts 6 are fixedly installed at the lower end of the water outlet plate 5. The connecting posts 6 are located between adjacent connecting rods 4. A liquid extraction baffle 7 is fixedly installed at the lower end of the connecting post 6. A gap is left between the outer side of the liquid extraction baffle 7 and the inner wall of the filter element outer shell 1. The inner side of the liquid extraction baffle 7 is attached to the outer side of the filter element inner shell 2. An annular baffle 14 is located between the liquid extraction baffle 7 and the connecting rod 4. A certain gap is left between the inner side of the annular baffle 14 and the outer side of the filter element inner shell 2. The annular baffle 14 is sleeved on the outside of several connecting posts 6. When liquid is drawn into the cavity, the water flow pushes the liquid extraction baffle 7, along with the connecting column 6 and the water outlet plate 5, to move synchronously. When the liquid extraction baffle 7 is in contact with the annular baffle 14, the cavity is blocked. Before the liquid extraction baffle 7 is fully in contact, some liquid flows into the area above the water outlet plate 5. The water outlet plate 5, the connecting column 6, and the liquid extraction baffle 7 are made of lightweight waterproof materials, such as carbon fiber composite materials.

[0022] The liquid-absorbing barrier outer plate 8 is linearly distributed on the inner wall of the filter element shell 1. The liquid-absorbing barrier outer plate 8 is set above the water outlet plate 5. A certain gap is left between the inner side of the liquid-absorbing barrier outer plate 8 and the outer side of the filter element inner shell 2. The inner diameter of the liquid-absorbing barrier outer plate 8 is defined as L. The liquid-absorbing barrier inner plate 9 is linearly distributed on the outer side of the filter element inner shell 2. A certain gap is left between the outer side of the liquid-absorbing barrier inner plate 9 and the inner wall of the filter element shell 1. The outer diameter of the liquid-absorbing barrier inner plate 9 is defined as R, and R>L. When some liquid flows into the area above the water outlet plate 5, the staggered distribution and R>L structure make the cavity form a Z-shaped tortuous channel, which counteracts the suction force on the liquid in the cavity. After the suction is completed, the liquid in the cavity cannot flow into the upper part of the straw and stays in the middle of the cavity, thus separating it from the filtered liquid.

[0023] At least two filter element limiting plates 11 are fixedly provided on the inner wall of the filter element inner shell 2. The filter element limiting plates 11 are configured as annular structures. A filter layer 12 is filled between the two filter element limiting plates 11. An outlet baffle 13 is provided above the filter element limiting plates 11. A certain gap is left between the outer side of the outlet baffle 13 and the inner wall of the filter element inner shell 2. The main body of the outlet baffle 13 is configured as a cylindrical structure. The diameter of the main body of the outlet baffle 13 is larger than the inner diameter of the filter element limiting plates 11. The filter element limiting plate 11 fixes the filter layer 12 to prevent the filter layer 12 from flowing with the liquid during filtration. When the liquid is sucked up, the suction force generated by the rubber suction ball pushes the liquid outlet baffle 13 upward to move. Most of the liquid enters the inner shell 2 of the filter element through the water inlet 10. It first passes through the filter layer 12, and then the water flow, together with the suction force, pushes the liquid outlet baffle 13 upward to move, so that the liquid flows into the upper part of the Parshall pipe. When the liquid is discharged, the rubber suction ball is squeezed, generating a blowing force that, together with the liquid, pushes the liquid outlet baffle 13 downward, thereby blocking the internal flow space of the inner shell 2 of the filter element and preventing the filtered liquid from being contaminated again by passing through the filter layer 12.

[0024] The working principle of the above embodiment is as follows: The filter element is inserted into the neck of the Pasteur straw through the lower conical structure. The elastic material on the outer side of the filter element shell 1 is compressed and rebounds to be fixed with the limiting block 3. After the rubber suction ball is installed at the thick end of the Pasteur straw, the suction ball is squeezed and then released to generate suction. Most of the liquid enters the inner shell 2 of the filter element through the funnel-shaped suction port 10, and a small part flows into the cavity between the filter element shell 1 and the inner shell 2. The liquid flowing into the inner shell 2 of the filter element is filtered by the filter layer 12 fixed by the filter element limiting plate 11. Under the action of suction and water flow, the liquid is pushed upward to the outlet baffle 13 and flows out from its outer side. The liquid flows into the upper part of the suction tube through the gap. Under the suction and water flow, the liquid in the cavity moves the water outlet plate 5 upward, which drives the connecting column 6 and the liquid suction baffle 7 to move. After the liquid suction baffle 7 is attached to the annular baffle 14, it blocks the subsequent liquid from entering. The liquid above the water outlet plate 5 is resisted by the Z-shaped channel formed by the staggered distribution of the liquid suction barrier outer plate 8 and the liquid suction barrier inner plate 9 with R>L, and stays in the cavity. When the liquid is discharged, the blowing force generated by squeezing the suction ball causes the liquid outlet baffle 13 to move down and block the channel of the filter inner shell 2. The water outlet plate 5 moves down to connect the cavity. Finally, the filtered liquid flows out of the suction tube from the cavity.

[0025] The use of rubber suction balls and filter layer 12 are common existing technologies. The installation method, connection method or setting method disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. They are common knowledge in the field. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A glass pasteurized straw stopper filter element, characterized in that: The filter includes a filter housing (1) and a filter inner housing (2). The filter inner housing (2) is fixedly disposed inside the filter housing (1). A cavity is provided between the filter housing (1) and the filter inner housing (2). The upper sections of the filter housing (1) and the filter inner housing (2) are configured as hollow cylindrical structures, and the lower sections of the filter housing (1) and the filter inner housing (2) are configured as conical guide hollow structures. A limiting block (3) is fixedly disposed on the outside of the filter housing (1). The limiting block (3) is disposed on the top of the filter housing (1). The filter housing (1) is located inside the filter inner housing. A water outlet plate (5) is slidably provided in the filter element shell (1). An annular baffle (14) is fixedly provided on the inner wall of the filter element shell (1). Several liquid extraction blocking outer plates (8) are fixedly provided on the inner wall of the filter element shell (1). Several liquid extraction blocking inner plates (9) are fixedly provided on the outer side of the filter element inner shell (2). The liquid extraction blocking outer plates (8) and the liquid extraction blocking inner plates (9) are set as a circular ring structure. A liquid outlet baffle (13) is slidably provided inside the filter element inner shell (2). A water inlet (10) is provided at the lower end of the filter element inner shell (2). The water inlet (10) is set in a horn-shaped hollow structure.

2. The glass Pasteurized straw stopper filter element according to claim 1, characterized in that: A number of connecting rods (4) are fixedly provided on the outer side of the inner shell (2) of the filter element. The connecting rods (4) are distributed in a ring on the outer side of the inner shell (2) of the filter element. The end of the connecting rod (4) away from the inner shell (2) of the filter element is fixedly connected to the inner wall of the outer shell (1) of the filter element.

3. The glass Pasteurized straw stopper filter element according to claim 2, characterized in that: The water outlet plate (5) is located inside the cavity between the filter element outer shell (1) and the filter element inner shell (2). The water outlet plate (5) is located above the connecting rod (4). Several connecting posts (6) are fixedly installed at the lower end of the water outlet plate (5).

4. The glass Pasteurized straw stopper filter element according to claim 3, characterized in that: The connecting column (6) is disposed between adjacent connecting rods (4). A liquid extraction baffle (7) is fixedly disposed at the lower end of the connecting column (6). A gap is left between the outer side of the liquid extraction baffle (7) and the inner wall of the filter element shell (1). The inner side of the liquid extraction baffle (7) is attached to the outer side of the filter element inner shell (2).

5. The glass Pasteurized straw stopper filter element according to claim 4, characterized in that: The annular baffle (14) is disposed between the liquid extraction baffle (7) and the connecting rod (4). A certain gap is left between the inner side of the annular baffle (14) and the outer side of the inner shell (2) of the filter element. The annular baffle (14) is sleeved on the outside of several connecting columns (6).

6. The glass Pasteurized straw stopper filter element according to claim 1, characterized in that: The liquid-absorbing barrier outer plate (8) is linearly distributed on the inner wall of the filter element shell (1). The liquid-absorbing barrier outer plate (8) is set above the water outlet plate (5). There is a certain gap between the inner side of the liquid-absorbing barrier outer plate (8) and the outer side of the filter element inner shell (2). The inner diameter of the liquid-absorbing barrier outer plate (8) is defined as L. The liquid-absorbing barrier inner plate (9) is linearly distributed on the outer side of the filter element inner shell (2). There is a certain gap between the outer side of the liquid-absorbing barrier inner plate (9) and the inner wall of the filter element shell (1). The outer diameter of the liquid-absorbing barrier inner plate (9) is defined as R, and R>L.

7. The glass Pasteurized straw stopper filter element according to claim 1, characterized in that: At least two filter element limiting plates (11) are fixedly provided on the inner wall of the filter element inner shell (2). The filter element limiting plates (11) are configured as a ring structure. A filter layer (12) is filled between the two filter element limiting plates (11). The liquid outlet baffle (13) is disposed above the filter element limiting plates (11). A certain gap is left between the outer side of the liquid outlet baffle (13) and the inner wall of the filter element inner shell (2). The main body of the liquid outlet baffle (13) is configured as a cylindrical structure. The diameter of the main body of the liquid outlet baffle (13) is larger than the inner diameter of the filter element limiting plates (11).

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