Pressing ring type funnel

Abstract

The utility model provides a compression ring type funnel. The hopper comprises a hopper body, an operating handle, a filter cartridge, a filter disc and a sealing pressing ring, the operating handle is fixedly arranged on the hopper body, a first material cavity is formed in the hopper body, the filter cartridge is arranged in the first material cavity and tightly attached to the inner wall of the first material cavity, a second material cavity is formed in the filter cartridge, and the second material cavity is directly communicated with the first material cavity. The barrel bottom of the filter barrel is of a porous structure, the filter disc is arranged at the barrel bottom of the filter barrel and completely covers the porous structure of the barrel bottom, the sealing pressing ring is arranged in the second material cavity and fixedly matched with the filter barrel, and the filter disc is pressed and limited between the sealing pressing ring and the barrel bottom of the filter barrel. No gap exists between the filter disc and the filter cartridge of the funnel, so that no filter residue enters the funnel when materials are filtered.

Description

Technical Field

[0001] The utility model relates to the field of funnels, in particular to a pressure ring type funnel. Background Art

[0002] The Büchner funnel is a ceramic instrument used in the laboratory. It can also be made of plastic. It is used for filtration using vacuum or negative pressure suction. It is in the shape of a flat cylinder with many small holes on the bottom of the cylinder and a narrow cylindrical outlet at the bottom. When using it, filter paper is usually placed on the bottom of the cylinder, and the funnel is inserted into the upper opening of the Büchner flask and the interface is sealed (for example, with a rubber ring). The side port of the Büchner beaker is connected to the exhaust system, and then the solid and liquid mixture to be separated is poured into the top. The liquid component is drawn into the beaker under negative pressure, and the solid remains on the top. It is often used to extract crystals in organic chemistry experiments. After the filtration in this case is completed, a small amount of pure solvent can be used on the top to wash away impurities on the surface of the crystals. For example, a Büchner funnel disclosed in the prior art uses a sand core instead of a filter hole to prevent the filter paper from breaking from the filter hole during the filtration process (when filter paper is needed). The pressure ring presses the edge of the filter paper to prevent the edge of the filter paper from wrinkling. The Büchner funnel is divided into a sand core funnel and a liquid collection funnel. When there are stubborn stains inside the funnel, it can be disassembled for easy cleaning. However, the Büchner funnel of this design is divided into a sand core funnel and a liquid collection funnel. A gasket is provided between the sand core funnel and the liquid collection funnel. If the use cycle is too long, air leakage will occur. It is unstable and there is a certain risk of air leakage, which affects the filtration quality and efficiency. For oily materials, when filtering, the filter paper placed in the funnel cannot fit well with the filter cartridge, resulting in the entry of filter residue during filtration, so that the filtrate is unclear and needs to be re-filtered, which is more cumbersome. Utility Model Content

[0003] The main purpose of the utility model is to provide a pressure ring type funnel to overcome the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose of the utility model, the technical solutions adopted by the utility model include:

[0005] An embodiment of the present utility model provides a pressure ring funnel, which includes: a hopper body and an operating handle, a filter cartridge, a filter disc and a sealing pressure ring, wherein the operating handle is fixedly arranged on the hopper body, the hopper body has a first material cavity inside, the filter cartridge is arranged in the first material cavity and is tightly attached to the inner wall of the first material cavity, the filter cartridge has a second material cavity inside, the second material cavity is directly connected to the first material cavity, the bottom of the filter cartridge is a porous structure, the filter disc is arranged at the bottom of the filter cartridge and completely covers the porous structure of the bottom of the cartridge, the sealing pressure ring is arranged in the second material cavity, the sealing pressure ring is fixedly matched with the filter cartridge, and the filter disc is pressed and confined between the sealing pressure ring and the bottom of the filter cartridge.

[0006] Furthermore, a partition is provided inside the hopper body, which separates the first material cavity into a first cavity and a second cavity, and a material port is also provided on the partition, through which the first cavity and the second cavity are connected, and the filter cartridge is provided on the partition and located in the first cavity.

[0007] Furthermore, the partition is a conical structure, the material port is located on the central axis of the conical structure, and the partition and the bottom of the filter cartridge form a conical cavity, the inner diameter of the conical cavity gradually decreases in the direction away from the filter cartridge.

[0008] Furthermore, a groove is provided on the inner wall of the filter cartridge, and the sealing pressure ring is embedded in the groove.

[0009] Furthermore, a card is provided on the sealing pressure ring, and the card is embedded in the card slot.

[0010] Furthermore, the card slot is a continuous structure continuously arranged along the circumference of the filter cartridge, or the card slot is a discontinuous structure arranged at intervals along the circumference of the filter cartridge, and the card is a continuous structure continuously arranged along the circumference of the sealing pressure ring, or the card is a discontinuous structure arranged at intervals along the circumference of the sealing pressure ring.

[0011] Furthermore, the card is formed by the main body of the sealing pressure ring protruding outward along its own radial direction.

[0012] Furthermore, the thickness of the card is smaller than the thickness of the main body of the sealing pressure ring.

[0013] Furthermore, the hopper body includes a feeding part, a guide part and a spout part arranged in sequence along its own axial direction, the inner diameter of the guide part gradually decreases from the feeding part to the spout part, and the partition is arranged between the feeding part and the guide part.

[0014] Furthermore, the feed part is a straight cylindrical structure, the outer diameter of the filter cartridge is slightly smaller than the inner diameter of the feed part, and the filter cartridge is detachably disposed in the feed part.

[0015] Furthermore, the guide portion and the nozzle portion are detachably connected.

[0016] Furthermore, the guide portion and the nozzle portion are threadedly connected.

[0017] Furthermore, the guide portion is provided with a first threaded barrel having an external thread structure, the nozzle portion is provided with a second threaded barrel having an internal thread structure, and the first threaded barrel and the second threaded barrel are threadedly connected.

[0018] Furthermore, the first threaded barrel includes an external threaded section and a first optical axis section arranged in sequence, the first optical axis section is located at the end of the external threaded section, the second threaded barrel includes an internal threaded section and a second optical axis section arranged in sequence, the second optical axis section is located on the side of the internal threaded section away from the first threaded barrel, the inner diameter of the second optical axis section is larger than the inner diameter of the internal threaded section, the external threaded section is threadedly matched with the internal threaded section, the first optical axis section is sleeved in the second optical axis section, and is tightly fitted with the second optical axis section.

[0019] Furthermore, a plurality of filter holes are provided at the bottom of the filter cartridge, and the apertures of the plurality of filter holes gradually decrease in a direction from the outer peripheral edge portion of the filter cartridge to the central area.

[0020] Technical effects and advantages of this utility model:

[0021] The utility model uses a matching filter cartridge according to the size of the Büchner funnel, and the outer diameter of the filter cartridge is the same as the inner diameter of the Büchner funnel that needs to be used. A matching rubber pressure ring is then used according to the size of the filter cartridge, and the outer diameter of the rubber pressure ring is the same as the inner diameter of the filter cartridge that needs to be used. When the rubber pressure ring is placed on the filter disc, it can press the filter disc and fit well with the filter cartridge, so that there is no gap between the filter disc and the filter cartridge, and no filter residue will enter when filtering the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of a pressure ring funnel provided in an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the explosion structure of a pressure ring funnel provided in an embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of a local explosion structure in a pressure ring funnel provided in an embodiment of the utility model. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of a local explosion structure in a pressure ring funnel provided in an embodiment of the utility model. Figure 2 ;

[0027] Figure 5 This is a schematic structural diagram of a drain nozzle in a pressure ring funnel provided in an embodiment of the present utility model;

[0028] Figure 6 It is a schematic cross-sectional structure diagram of a pressure ring funnel provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0029] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present utility model after long-term research and extensive practice. The utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present utility model are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present utility model to the disclosed forms. Many modifications and variations will be obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present utility model and to enable those skilled in the art to understand the present utility model and design various embodiments with various modifications suitable for specific purposes.

[0030] Example

[0031] See also Figures 1-6 , a pressure ring funnel, comprising a hopper body and an operating handle, a filter cartridge 6, a filter disc 7 and a sealing pressure ring 8, wherein the operating handle is fixedly arranged on the hopper body, the hopper body has a first material cavity inside, the filter cartridge 6 is arranged in the first material cavity, and is close to the inner wall of the first material cavity, the filter cartridge 6 has a second material cavity inside, the second material cavity is directly connected to the first material cavity, the bottom of the filter cartridge 6 is a porous structure, the filter disc 7 is arranged at the bottom of the filter cartridge 6, and completely covers the porous structure of the bottom of the cartridge, the sealing pressure ring 8 is arranged in the second material cavity, the sealing pressure ring 8 is fixedly matched with the filter cartridge 6, and the filter disc 7 is pressed and confined between the sealing pressure ring 8 and the bottom of the filter cartridge 6.

[0032] It should be noted that the outer diameter of the filter cartridge 6 is the same as the inner diameter of the hopper body in which it is located, and the diameter of the filter disc 7 installed at the bottom of the filter cartridge 6 is the same as the inner diameter of the filter cartridge 6 .

[0033] In this embodiment, a card slot 601 is further provided on the inner wall of the filter cartridge 6, and a card 801 is further provided on the sealing pressure ring 8, and the card 801 is embedded in the card slot 601. Specifically, the card slot 601 is a continuous structure continuously provided along the circumference of the filter cartridge 6, or the card slot 601 is a discontinuous structure provided at intervals along the circumference of the filter cartridge 6, and the card 801 is a continuous structure continuously provided along the circumference of the sealing pressure ring 8, or the card 801 is a discontinuous structure provided at intervals along the circumference of the sealing pressure ring 8. In order to improve the sealing effect between the two, the card slot 601 and the card 801 are preferably a continuous annular structure. It is understandable that the thickness of the card 801 should be equal to or slightly smaller than the width of the card slot 601, so that the card 801 can be embedded in the card slot 601 while minimizing the gap between the two.

[0034] In this embodiment, the card 801 is formed by the main body of the sealing pressure ring 8 protruding outward along its own radial direction, and the thickness of the card 801 is smaller than the thickness of the main body of the sealing pressure ring 8.

[0035] In this embodiment, the bottom of the filter cartridge 6 is provided with a plurality of filter holes 602, and the apertures of the plurality of filter holes 602 gradually decrease from the outer peripheral edge portion toward the center area of ​​the filter cartridge 6. Specifically, the plurality of filter holes 602 can be radially distributed along the bottom of the filter cartridge 6.

[0036] In this embodiment, the hopper body includes a feed portion 1, a guide portion 2, and a spout portion 3, which are sequentially arranged along its axial direction. The feed portion 1 is a straight cylindrical structure, and the guide portion 2 is a tapered structure with an inner diameter gradually decreasing from the feed portion 1 toward the spout portion 3. The operating handle 4 / 5 can be provided on the feed portion 1. Specifically, the guide portion 2 is provided with a first threaded barrel 201 having an external thread structure, and the spout portion 3 is provided with a second threaded barrel 301 having an internal thread structure. The first threaded barrel 201 and the second threaded barrel 301 are threadedly connected.

[0037] In order to improve the structural strength and sealing effect of the connection between the guide part 2 and the nozzle part 3, the first threaded barrel 201 includes an external thread section and a first optical axis section 202 arranged in sequence, the first optical axis section 202 is located at the end of the external thread section, the second threaded barrel 301 includes an internal thread section and a second optical axis section 302 arranged in sequence, the second optical axis section 302 is located on the side of the internal thread section away from the first threaded barrel 201, the inner diameter of the second optical axis section 302 is larger than the inner diameter of the internal thread section, the external thread section and the internal thread section are threadedly matched, the first optical axis section 202 is sleeved in the second optical axis section 302, and fits tightly with the second optical axis section 302. Through such a design, on the one hand, the guide part 2 and the nozzle part 3 can be more conveniently disassembled, maintained and cleaned, and on the other hand, the sealing effect between the guide part 2 and the nozzle part 3 is also guaranteed.

[0038] In this embodiment, a partition 101 is further provided inside the hopper body, and the partition 101 is provided between the feed part 1 and the guide part 2. The partition 101 divides the first material cavity into a first cavity and a second cavity, and a material port 102 is further provided on the partition 101, and the first cavity and the second cavity are connected through the material port 102. The filter cartridge 6 is provided on the partition 101 and is located in the first cavity. It can be understood that the filter cartridge 6 is sleeved in the feed part 1. It should be noted that the filter cartridge 6 and the hopper body are detachable. In order to achieve the cooperation between the two, the outer diameter of the filter cartridge 6 is slightly smaller than or equal to the inner diameter of the feed part 1, so that the filter cartridge 6 can fit tightly with the inner wall of the feed part 1 of the hopper body without affecting the disassembly of the two. Of course, a sealing rubber ring 603 can also be provided on the outside of the filter cartridge 6 to improve the sealing effect between the filter cartridge 6 and the hopper body.

[0039] In this embodiment, the partition 101 is a conical structure, the material port 102 is located on the central axis of the conical structure, and a conical cavity is formed between the partition 101 and the bottom of the filter cylinder 6. The inner diameter of the conical cavity gradually decreases in the direction away from the filter cylinder 6 to avoid the accumulation of filtered material on the partition 101. At the same time, the height difference of the conical structure can increase the flow rate of the filter material and improve the filtration efficiency.

[0040] By placing the filter cartridge 6 on the partition 101, placing the filter disc 7 at the bottom of the filter cartridge 6, pressing the filter disc 7 with the sealing pressure ring 8, and inserting the card 801 into the card slot 601, the filter disc 7 is pressed tightly so that there is no gap between the filter disc 7 and the filter cartridge 6, and no filter residue will enter when filtering the material.

[0041] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A pressure ring funnel, characterized in that: include: A hopper body, an operating handle, a filter cartridge (6), a filter disc (7) and a sealing pressure ring (8), wherein the operating handle is fixedly arranged on the hopper body, the hopper body has a first material cavity inside, the filter cartridge (6) is arranged in the first material cavity and is in close contact with the inner wall of the first material cavity, the filter cartridge (6) has a second material cavity inside, the second material cavity is directly connected to the first material cavity, the bottom of the filter cartridge (6) is a porous structure, the filter disc (7) is arranged at the bottom of the filter cartridge (6) and completely covers the porous structure of the bottom of the cartridge, the sealing pressure ring (8) is arranged in the second material cavity, the sealing pressure ring (8) is fixedly matched with the filter cartridge (6), and the filter disc (7) is compressed and confined between the sealing pressure ring (8) and the bottom of the filter cartridge (6).

2. The pressure ring funnel according to claim 1, characterized in that: A partition (101) is further provided inside the hopper body, and the partition (101) divides the first material cavity into a first cavity and a second cavity. In addition, a material port (102) is further provided on the partition (101), and the first cavity and the second cavity are connected through the material port (102). The filter cartridge (6) is provided on the partition (101) and is located in the first cavity.

3. The pressure ring funnel according to claim 2, characterized in that: The partition (101) is a conical structure, the material port (102) is located on the central axis of the conical structure, and the partition (101) and the bottom of the filter cartridge (6) form a conical cavity, the inner diameter of which gradually decreases in a direction away from the filter cartridge (6).

4. The pressure ring funnel according to claim 1, characterized in that: A clamping groove (601) is further provided on the inner wall of the filter cartridge (6), and the sealing pressure ring (8) is embedded in the clamping groove (601).

5. The pressure ring funnel according to claim 4, characterized in that: A card (801) is also provided on the sealing pressure ring (8), and the card (801) is embedded in the card slot (601).

6. The pressure ring funnel according to claim 5, characterized in that: The card slot (601) is a continuous structure continuously arranged along the circumference of the filter cartridge (6), or the card slot (601) is a discontinuous structure arranged at intervals along the circumference of the filter cartridge (6), and the card (801) is a continuous structure continuously arranged along the circumference of the sealing pressure ring (8), or the card (801) is a discontinuous structure arranged at intervals along the circumference of the sealing pressure ring (8); And / or, the card (801) is formed by the main body of the sealing pressure ring (8) protruding outward along its own radial direction; And / or, the thickness of the card (801) is smaller than the thickness of the main body of the sealing pressure ring (8).

7. The pressure ring funnel according to claim 2, characterized in that: The hopper body comprises a feed portion (1), a guide portion (2) and a spout portion (3) arranged in sequence along its axial direction, the inner diameter of the guide portion (2) gradually decreases in a direction from the feed portion (1) to the spout portion (3), and the partition (101) is arranged between the feed portion (1) and the guide portion (2).

8. The pressure ring funnel according to claim 7, characterized in that: The guide portion (2) and the nozzle portion (3) are detachably connected; And / or, the guide portion (2) and the nozzle portion (3) are threadedly connected; And / or, the guide portion (2) is provided with a first threaded barrel (201), the first threaded barrel (201) having an external thread structure, the nozzle portion (3) is provided with a second threaded barrel (301), the second threaded barrel (301) having an internal thread structure, and the first threaded barrel (201) and the second threaded barrel (301) are threadedly connected.

9. The pressure ring funnel according to claim 8, characterized in that: The first threaded barrel (201) comprises an external threaded section and a first optical axis section (202) which are arranged in sequence, the first optical axis section (202) being located at the end of the external threaded section, the second threaded barrel (301) comprises an internal threaded section and a second optical axis section (302) which are arranged in sequence, the second optical axis section (302) being located on a side of the internal threaded section away from the first threaded barrel (201), the inner diameter of the second optical axis section (302) being larger than the inner diameter of the internal threaded section, the external threaded section being threadedly engaged with the internal threaded section, the first optical axis section (202) being sleeved in the second optical axis section (302) and being tightly fitted with the second optical axis section (302).

10. The pressure ring funnel according to claim 1, characterized in that: The bottom of the filter cartridge (6) is provided with a plurality of filter holes (602), and the apertures of the plurality of filter holes (602) gradually decrease in a direction from the outer peripheral edge portion of the filter cartridge (6) toward the central area.

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