A filter holder with replaceable filter membrane

Abstract

This utility model relates to the field of filter support technology and discloses a filter support with replaceable filter membranes. It includes a base, with a bent tube extending through and fixedly connected to the inner wall of the base. A filter bucket is fixedly connected to the top of the bent tube, and a filter disc is placed inside the filter bucket. A filter membrane is placed inside the filter disc. A disassembly / assembly mechanism and a positioning mechanism are provided above the filter disc. The disassembly / assembly mechanism includes a handle fixedly connected to the top of the filter disc. A sliding plate is slidably connected to the outer wall of the handle, and a rod extends through and slidably connected to the inner wall of the handle. A protrusion is fixedly connected to the inner wall of the filter bucket. In this utility model, the design of the disassembly / assembly mechanism allows for quick disassembly / assembly of the filter disc, enabling its removal from the filter bucket. This facilitates the replacement of the filter membrane by workers without contact with the filter disc and filter membrane, thus avoiding the risk of infection.

Description

Technical Field

[0001] This utility model relates to the field of filter support technology, and in particular to a filter support with replaceable filter membrane. Background Technology

[0002] A filter holder is a support device used in solid-liquid separation operations. It is mainly used to fix filter funnels, Buchner funnels, or membrane filters and is used in conjunction with a vacuum filtration flask. The holder is usually made of corrosion-resistant metal or high-strength plastic and can provide stable and effective support for the filter assembly.

[0003] A search revealed a filter holder in Chinese Patent Publication No. CN215310534U. This utility model uses a connecting rib and a ring to support the filter paper, improving the weighing performance of the filter paper. When removing the filter paper, the holder is held by the snap-fit ​​part, and the entire filter paper holder is removed from the holder body. Then, the filter paper holder and the filter paper are moved together above the reagent kit. By tilting the filter paper holder, the filter paper slides off the holder and onto the reagent kit, reducing the risk of damage to the filter paper during movement.

[0004] The aforementioned patent requires manually removing the filter paper holder from the liquid guiding funnel when replacing the filter paper in order to separate the filter paper holder from the support body and remove the filter paper inside the filter paper holder. However, the internal space of the liquid guiding funnel is small, and manual removal is not only very troublesome, but also makes it easy to come into contact with residual chemical agents on the surface of the filter paper, posing a certain safety hazard. Therefore, a filter support with replaceable filter membrane is proposed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a filter holder with a replaceable filter membrane, which aims to improve the problem mentioned in the prior art that "replacing the filter paper is very troublesome and poses a safety hazard".

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a filter support with replaceable filter membrane, including a base, a bent tube that runs through and is fixedly connected to the inner wall of the base, a filter bucket that is fixedly connected to the top of the bent tube, a filter disc that is placed inside the filter bucket, a filter membrane component that is placed inside the filter disc, and a disassembly and assembly mechanism and a positioning mechanism that are provided above the filter disc.

[0007] The disassembly and assembly mechanism includes a handle, which is fixedly connected to the top of the filter disc. A sliding plate is slidably connected to the outer wall of the handle, and an insert rod is slidably connected through the inner wall of the handle. A protrusion is fixedly connected to the inner wall of the filter hopper, and a limit hole is formed in the inner wall of the protrusion. A connecting rod is hinged to the upper surface of the sliding plate.

[0008] As a further description of the above technical solution:

[0009] The positioning mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the lower surface of the sliding plate, and a pressing ring is fixedly connected to the other end of the connecting rod.

[0010] As a further description of the above technical solution:

[0011] A rubber pad is fixedly connected to the lower surface of the pressing ring, and the pressing ring presses the filter membrane element tightly inside the filter disc through the rubber pad.

[0012] As a further description of the above technical solution:

[0013] One end of the limiting hole close to the inserting rod is an open structure, and the inner diameter of the limiting hole is the same as the outer diameter of the inserting rod.

[0014] As a further description of the above technical solution:

[0015] One end of the inserting rod is inserted into the limiting hole, a spring is fixedly connected to the other end of the inserting rod, and the end of the spring far from the inserting rod is fixedly connected to the inner wall of the handle.

[0016] As a further description of the above technical solution:

[0017] The end of the connecting rod far from the sliding plate is hinged to the outer wall of the inserting rod.

[0018] As a further description of the above technical solution:

[0019] The filter disc is a disc-shaped structure with internal openings, and the outer wall of the filter disc fits against the inner wall of the filter funnel.

[0020] The handle is a "U"-shaped rod-like structure, and the rod end of the handle is fixedly connected to the top of the filter disc.

[0021] The present utility model has the following beneficial effects:

[0022] 1. In the present utility model, through the design of the disassembly and assembly mechanism, the filter disc can be quickly disassembled and assembled so as to be taken out from the inside of the filter funnel, facilitating the staff to replace the filter membrane element, and without contacting the filter disc and the filter membrane element during replacement, thus avoiding the risk of infection.

[0023] 2. In the present utility model, through the design of the positioning mechanism, the edge of the filter membrane element can be pressed tightly inside the filter disc, preventing the edge of the filter membrane element from warping during the filtering process, thus ensuring the reagent filtering effect and improving the accuracy of data detection. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2This is a cross-sectional structural diagram of the filter bucket of this utility model;

[0026] Figure 3 A schematic diagram of the filter disc of this utility model in the state of replacing the filter membrane component;

[0027] Figure 4 This utility model Figure 2 A magnified structural diagram at point A;

[0028] Figure 5 This utility model Figure 2 A magnified structural diagram at point B.

[0029] Legend:

[0030] 1. Base; 2. Bend; 3. Filter hopper; 4. Filter disc; 5. Filter membrane element; 6. Assembly / disassembly mechanism; 61. Handle; 62. Slide plate; 63. Insert rod; 64. Protrusion; 65. Limiting hole; 66. Connecting rod; 67. Spring; 7. Positioning mechanism; 71. Connecting rod; 72. Pressure ring; 73. Rubber pad. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1-3 The present invention provides an embodiment of a filter support with a replaceable filter membrane, comprising a base 1, a bent tube 2 that is fixedly connected through the inner wall of the base 1, and a filter funnel 3 that is fixedly connected to the top of the bent tube 2. In use, the reagent to be filtered is poured into the interior of the filter funnel 3. A filter disc 4 is placed inside the filter funnel 3. The filter disc 4 is a disc-shaped structure with an internal opening. The outer wall of the filter disc 4 is attached to the inner wall of the filter funnel 3. A filter membrane 5 is placed inside the filter disc 4. The reagent filtered by the filter membrane 5 flows into the interior of the bent tube 2 through the opening on the filter disc 4. A disassembly and assembly mechanism 6 and a positioning mechanism 7 are provided above the filter disc 4.

[0033] Reference Figures 2-4, the disassembly and assembly mechanism 6 includes a handle 61. The handle 61 is fixedly connected to the top of the filter disc 4. The handle 61 is a "U"-shaped rod-like structure, and the rod end of the handle 61 is fixedly connected to the top of the filter disc 4. By lifting the filter disc 4 upward through the handle 61, the filter disc 4 can be taken out from the inside of the filter hopper 3 so as to replace the filter membrane element 5 inside the filter disc 4. A slide plate 62 is slidably connected to the outer wall of the handle 61. A connecting rod 66 is hinged to the upper surface of the slide plate 62. One end of the connecting rod 66 away from the slide plate 62 is hinged to the outer wall of the plug rod 63. While the slide plate 62 slides on the outer wall of the handle 61, the connecting rod 66 can be used to push the plug rod 63 in cooperation, so that the plug rod 63 slides on the inner wall of the handle 61.

[0034] Refer to Figure 4 , a plug rod 63 is penetrated and slidably connected to the inner wall of the handle 61. One end of the plug rod 63 is inserted into the inside of the limiting hole 65. The limiting hole 65 can be used to limit the plug rod 63. The other end of the plug rod 63 is fixedly connected to a spring 67. One end of the spring 67 away from the plug rod 63 is fixedly connected to the inner wall of the handle 61. The elasticity of the spring 67 can be used to drive the plug rod 63 to slide and reset on the inner wall of the handle 61, so that the plug rod 63 can be stably inserted into the inside of the limiting hole 65.

[0035] Refer to Figure 4 , a convex block 64 is fixedly connected to the inner wall of the filter hopper 3. A limiting hole 65 is opened on the inner wall of the convex block 64. One end of the limiting hole 65 close to the plug rod 63 is an open-shaped structure. The inner diameter of the limiting hole 65 is the same as the outer diameter of the plug rod 63. The limiting hole 65 and the convex block 64 can be used to limit the plug rod 63, so that the plug rod 63 limits the handle 61.

[0036] Refer to Figure 3 And Figure 5 , the positioning mechanism 7 includes a connecting rod 71. One end of the connecting rod 71 is fixedly connected to the lower surface of the slide plate 62. The other end of the connecting rod 71 is fixedly connected to a pressing ring 72. While the slide plate 62 slides on the outer wall of the handle 61, the connecting rod 71 can be used to drive the pressing ring 72 to move synchronously, so that the pressing ring 72 can drive the rubber pad 73 to press the filter membrane element 5 or separate from the filter membrane element 5. A rubber pad 73 is fixedly connected to the lower surface of the pressing ring 72. The pressing ring 72 presses the filter membrane element 5 inside the filter disc 4 through the rubber pad 73. The filter membrane element 5 can be fixed by the pressing ring 72 and the rubber pad 73 in cooperation, so as to prevent the filter membrane element 5 from warping during the filtering process.

[0037] Working principle: When the filter membrane element 5 needs to be replaced, first push the slide plate 62 upward so that it slides upward on the outer wall of the handle 61. At this time, the slide plate 62 will push the connecting rod 66, which will push the insertion rod 63. The insertion rod 63 will slide towards the inner wall of the handle 61 and compress the spring 67. At the same time, the insertion rod 63 will gradually move out of the limiting hole 65. After the insertion rod 63 has completely moved out of the limiting hole 65, the protrusion 64 will release the limiting of the insertion rod 63. At this time, the filter disc 4 can be lifted upward by the handle 61, thereby removing the filter disc 4 from the filter. Remove the filter membrane element 5 from the inside of the filter hopper 3. Then, use tweezers to remove the filter membrane element 5 from the inside of the filter tray 4. Place the replaced filter membrane element 5 back into the inside of the filter tray 4 and position it below the pressure ring 72. Then, insert the filter tray 4 into the inside of the filter hopper 3 using the handle 61, so that the insertion rod 63 is inserted into the inside of the limiting hole 65. At this time, the insertion rod 63 can be limited by the limiting hole 65 and the protrusion 64, so that the insertion rod 63 limits the handle 61. At this time, the filter tray 4 can be limited inside the filter hopper 3 using the handle 61. Thus, the replacement of the filter membrane element 5 is completed.

[0038] When the sliding plate 62 is pushed upwards and slides upwards on the outer wall of the handle 61, the sliding plate 62 will drive the connecting rod 71 to move upwards simultaneously. At this time, the connecting rod 71 will drive the pressure ring 72 to move upwards simultaneously. The upward movement of the pressure ring 72 can separate the rubber pad 73 from the filter membrane 5, so that the filter membrane 5 can be removed from the inside of the filter tray 4. When the sliding plate 62 slides downwards and resets on the outer wall of the handle 61, the sliding plate 62 will drive the connecting rod 71 to move downwards simultaneously. At this time, the connecting rod 71 will drive the pressure ring 72 to move downwards simultaneously. The downward movement of the pressure ring 72 can press the rubber pad 73 at its bottom tightly into the inside of the filter tray 4. At this time, the pressure ring 72 and the rubber pad 73 can fix the filter membrane 5, preventing the filter membrane 5 from tilting up during the filtration process, thereby ensuring the reagent filtration effect.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter holder with replaceable filter membrane, comprising a base (1), characterized in that: The inner wall of the base (1) is penetrated and fixedly connected with an elbow pipe (2). The top of the elbow pipe (2) is fixedly connected with a filter hopper (3). A filter disc (4) is placed inside the filter hopper (3). A filter membrane component (5) is placed inside the filter disc (4). An assembly and disassembly mechanism (6) and a positioning mechanism (7) are arranged above the filter disc (4). The assembly and disassembly mechanism (6) includes a handle (61). The handle (61) is fixedly connected to the top of the filter disc (4). A slide plate (62) is slidably connected to the outer wall of the handle (61). A plug rod (63) is penetrated and slidably connected to the inner wall of the handle (61). A convex block (64) is fixedly connected to the inner wall of the filter hopper (3). A limiting hole (65) is formed in the inner wall of the convex block (64). A connecting rod (66) is hinged to the upper surface of the slide plate (62).

2. The filter holder with replaceable filter membrane according to claim 1, characterized in that: The positioning mechanism (7) includes a connecting rod (71). One end of the connecting rod (71) is fixedly connected to the lower surface of the slide plate (62). The other end of the connecting rod (71) is fixedly connected to a pressing ring (72).

3. The filter holder with replaceable filter membrane according to claim 2, characterized in that: A rubber pad (73) is fixedly connected to the lower surface of the pressing ring (72). The filter membrane component (5) is pressed tightly inside the filter disc (4) by the pressing ring (72) through the rubber pad (73).

4. The filter holder with replaceable filter membrane according to claim 1, characterized in that: One end of the limiting hole (65) close to the plug rod (63) is an open structure. The inner diameter of the limiting hole (65) is the same as the outer diameter of the plug rod (63).

5. The filter holder with replaceable filter membrane according to claim 1, characterized in that: One end of the plug rod (63) is inserted into the limiting hole (65). The other end of the plug rod (63) is fixedly connected to a spring (67). The end of the spring (67) far from the plug rod (63) is fixedly connected to the inner wall of the handle (61).

6. The filter holder with replaceable filter membrane according to claim 1, characterized in that: The end of the connecting rod (66) far from the slide plate (62) is hinged to the outer wall of the plug rod (63).

7. The filter holder with replaceable filter membrane according to claim 1, characterized in that: The filter disc (4) is a disc-shaped structure with openings inside. The outer wall of the filter disc (4) is fitted to the inner wall of the filter hopper (3).

8. The filter holder with replaceable filter membrane according to claim 1, characterized in that: The handle (61) is a "C"-shaped rod structure. The rod end of the handle (61) is fixedly connected to the top of the filter disc (4).

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