A suction filtration device for solid-liquid separation operations

Abstract

The utility model discloses a kind of suction filtration devices for solid-liquid separation operation, including jar body and detachable sealing cover body.Jar body inner wall is equipped with supporting flange, sintered metal filter screen can be placed thereon, annular metal frame is equipped on the outer periphery of filter screen and is sealed with jar body inner wall by sealing ring;Annular compression member is arranged above filter screen, several downwardly extending compression rods are distributed in the circumferential direction of cover body inner side, and the lower end of compression rod is spherical end, which cooperates with the annular taper surface of annular compression member.When cover body is closed, compression rod ball head slides along annular taper surface, realizing automatic guiding and uniform compression, so that filter screen assembly completes sealing fixation without manual alignment.The utility model can simultaneously complete installation positioning and sealing compression of filter screen assembly through the closing action of cover body, and it is easy to operate, reliable in sealing, convenient for filter screen cleaning and material discharge, and effectively prevents solvent evaporation, suitable for laboratory, pilot and industrial liquid filtration occasions.

Description

Technical Field

[0001] This utility model relates to the field of biopharmaceutical equipment technology, specifically to a filtration device for solid-liquid separation operations. Background Technology

[0002] A vacuum filter tank is a device that uses vacuum negative pressure to separate solids from liquid mixtures. It is widely used in chemical, pharmaceutical, food, bioengineering, and materials preparation industries. Its basic principle is to create negative pressure inside the tank using a vacuum pump, forcing the liquid through a filter screen under the pressure difference, thereby separating the filtrate from the solids.

[0003] Existing vacuum filtration tanks generally consist of a tank body, a cover, a filter screen assembly, and a bottom drainage structure. Material enters the tank from the top and is separated by vacuum filtration. However, existing vacuum filtration tanks still have significant shortcomings in terms of structural design and ease of use and maintenance.

[0004] Firstly, filters are typically fixed structures, requiring the entire tank to be disassembled for cleaning or replacement. This is not only cumbersome and inefficient but also prone to material contamination, affecting the cleanliness of the production environment and the continuity of the process. To address this issue, some devices have begun to adopt detachable filter structures, allowing the filter components to be removed individually for cleaning or replacement.

[0005] However, this type of detachable structure brings new problems in actual use: the filter assembly is complicated and has many sealing structures, which can easily lead to poor sealing during installation, resulting in air leakage or filtrate leakage, affecting filtration efficiency and equipment reliability. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A filtration device for solid-liquid separation includes a tank and a cover. The cover is detachably and sealingly installed on the upper end of the tank. A discharge port is provided in the middle of the side wall of the tank, and the discharge port is equipped with a discharge port sealing cap for removing the solid material remaining on the filter screen after filtration. A supporting flange is provided circumferentially below the discharge port on the inner wall of the tank. A sintered metal filter screen is placed on the supporting flange, and an annular metal frame is fixed to the outer periphery of the sintered metal filter screen. An elastic sealing ring is provided between the supporting flange and the annular metal frame for sealing. An annular clamping member is provided above the sintered metal filter screen. Several downwardly extending pressure rods are provided circumferentially on the inner side of the cover. The ends of each pressure rod cooperate with the annular clamping member to press the annular clamping member downward when the cover is closed, so that the annular metal frame and the supporting flange are sealed and fixed in the tank. An elastic sealing ring is provided between the annular clamping member and the annular metal frame.

[0007] Furthermore, the lower end of the pressure rod is a ball head structure, and the upper surface of the annular clamping member is provided with an annular guide surface that cooperates with the ball head, which is used to achieve automatic alignment and uniform clamping when the cover is closed.

[0008] Furthermore, the annular guide surface is an annular conical surface at an angle of 25° to 35° with the horizontal plane.

[0009] Furthermore, the upper part of the cover is provided with a liquid inlet and a vent. The liquid inlet is used to add the liquid material to be filtered into the tank, and the vent is used to adjust the internal pressure of the tank during vacuuming and liquid drainage.

[0010] Furthermore, the bottom of the tank is provided with a drain port and a connecting pipe connected to a vacuum pump to achieve negative pressure filtration and liquid discharge.

[0011] Furthermore, three pressure rods are evenly distributed circumferentially, and their projections in the direction of the tank's center are spaced 120° apart, so as to achieve uniform force on the annular clamping component.

[0012] Furthermore, the cover and the tank are connected by a flange structure and sealed by bolts.

[0013] Furthermore, the outlet and the sealing cover are connected by a flange structure and sealed by bolts.

[0014] Furthermore, the bottom of the tank is provided with several circumferentially distributed support legs, and the bottom of each support leg is provided with a roller assembly for supporting and facilitating the movement of the filtration tank. The support legs are connected to the tank body by a flange structure and fixed by bolts.

[0015] Furthermore, the upper part of the cover is provided with a handle for carrying, installing and disassembling the cover.

[0016] Compared with existing technologies, it has the following beneficial effects: This invention utilizes a clamping structure with a spherical end and an annular conical guide surface to synchronize the closing action of the cover with the clamping action of the filter screen, significantly simplifying the operation steps and ensuring uniform force on the filter screen and reliable sealing. Simultaneously, the use of a detachable sintered filter screen assembly and a flange-connected discharge structure facilitates filter screen cleaning, replacement, and material discharge. Combined with a bottom roller assembly, this enables the portable application of the suction filter tank, making it suitable for various applications such as laboratory, pilot-scale, and industrial filtration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a vacuum filter tank according to the present invention; Figure 2 for Figure 1The exploded view of the filter tank shown. Figure 3 for Figure 1 A schematic diagram of the cover structure from below; Figure 4 for Figure 1 A cross-sectional view of the filter tank shown. Figure 5 for Figure 4 A magnified view of a section at point B in the middle; Figure 6 for Figure 1 The diagram shows the overall cross-sectional structure of the filtration tank.

[0018] Among them, 1. Tank body; 11. Support flange; 12. Drain port; 13. Connecting pipe; 14. Support leg; 15. Roller assembly; 2. Cover; 21. Handle; 22. Liquid inlet; 23. Vent; 3. Sintered metal filter screen; 31. Annular metal frame; 4. Pressure rod; 5. Annular clamping part; 6. Discharge port; 61. Discharge port sealing cover. Detailed Implementation

[0019] The following will describe the technology of the embodiments of the present utility model clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0020] like Figures 1-6 As shown, this embodiment is a filtration device for solid-liquid separation operation, including a tank 1 and a cover 2, wherein the cover 2 is detachably and sealed to the upper end of the tank 1.

[0021] The upper part of the cover 2 is provided with a handle 21 to facilitate the handling, installation and disassembly of the cover; the cover is also provided with a liquid inlet 22 and a vent 23, wherein the liquid inlet 22 is used to add the liquid material to be filtered into the tank 1, and the vent 23 is used to adjust the internal pressure of the tank during vacuuming and liquid drainage, or to connect a vacuum gauge and a safety valve to ensure the safety and stability of the filtration process.

[0022] A discharge port 6 is provided in the middle of the side wall of the tank 1 for discharging the solid material remaining on the filter screen after filtration. A discharge port sealing cover 61 is provided at the discharge port 6. The discharge port sealing cover 61 adopts a flange structure and is locked with bolts to ensure the sealing performance of the tank under vacuum conditions.

[0023] A supporting flange 11 is circumferentially provided on the inner wall of the tank body 1, below the discharge port 6, to support the filter assembly. The filter assembly includes a sintered metal filter screen 3 and an annular metal frame 31 fixedly connected to its outer periphery. The annular metal frame 31 and the sintered metal filter screen 3 can be fixed together by laser welding or edge rolling. The sintered metal filter screen 3 is placed on the supporting flange 11, and an elastic sealing ring is provided between them to achieve sealing and buffering, preventing gas or liquid leakage during the filtration process.

[0024] An annular clamping member 5 is provided above the sintered metal filter screen 3. The annular clamping member 5 is concentrically arranged with the annular metal frame 31 and is used to clamp and seal the filter assembly.

[0025] The inner side of the cover 2 is provided with a plurality of downwardly extending pressure rods 4 along the circumference. In this embodiment, three rods are preferably provided and are distributed at 120° intervals along the circumference. The position of each pressure rod 4 on the inner side of the cover corresponds to the annular guide surface of the annular clamping member 5, and its end is a spherical end, which cooperates with the annular guide surface on the upper surface of the annular clamping member 5. The annular guide surface is an annular conical structure, and the inclination angle is preferably 25° to 35°.

[0026] like Figure 4 and Figure 5 As shown, when the cover 2 is closed, the ball heads of each pressure rod 4 slide down along the annular guide surface to achieve automatic alignment and uniformly press down the annular clamping member 5, so that the annular metal frame 31 is sealed and engaged with the supporting flange 11 through the elastic sealing ring, thereby sealing and fixing the sintered metal filter screen 3 inside the tank 1.

[0027] like Figure 6 As shown, the bottom of the tank 1 is provided with a drain port 12 and a connecting pipe 13 connected to a vacuum pump. The drain port 12 is used to discharge the filtered liquid, and the connecting pipe 13 is used to extract gas from the tank to create a negative pressure environment, thereby realizing the filtration process. Both the drain port 12 and the connecting pipe 13 can be connected by a flange structure for easy maintenance and cleaning.

[0028] The bottom outer side of the tank body 1 is provided with several circumferentially distributed support legs 14, and the bottom of each support leg 14 is provided with a roller assembly 15 for supporting and facilitating the movement of the filtration tank. The support legs 14 and the roller assembly 15 are fixed together by bolts, which makes the structure stable and easy to assemble and disassemble.

[0029] The working principle of this embodiment: like Figures 1-6As shown, in this embodiment, when using the filtration tank, the operator first mixes and stirs the sample with a solid content of approximately 5% with the solvent to form a suspension, which is then added into the tank 1 through the inlet 22 on the cover 2. The cover 2 and the tank 1 are sealed together by a flange structure. After the cover is closed, it forms a sealed space with the upper port of the tank to prevent the solvent from evaporating during the filtration process and to prevent external impurities from entering the tank, thereby ensuring a clean and safe filtration environment.

[0030] Unlike traditional devices, the filter screen in this embodiment has a detachable structure, and its sealing and fixing process is automatically completed by the closing action of the cover. Several pressure rods 4 are evenly distributed along the circumference of the inner side of the cover 2, each pressure rod 4 having a spherical end. In the filter screen assembly, an annular metal frame 31 is fixed to the outer edge of the sintered metal filter screen 3, and an annular clamping member 5 is arranged above it, with the upper surface of the annular clamping member 5 forming an annular conical surface. When the cover 2 closes, the spherical ends of each pressure rod 4 automatically contact the conical surface of the annular clamping member 5 and generate a guiding effect. As the cover is further pressed down and locked through the flange, the spherical ends of the pressure rods slide along the conical surface, achieving automatic alignment and guidance. During this process, the annular clamping member 5 is evenly pressed against the outer edge of the filter screen 3, enabling the filter screen assembly to achieve automatic centering and sealing without manual alignment. Therefore, the closing action of the cover and the clamping action of the filter screen are completed synchronously, requiring no additional adjustment during the entire installation process, simplifying the assembly operation and avoiding sealing problems caused by manual alignment errors.

[0031] During the filtration process, the connecting pipe 13 at the bottom of tank 1 is connected to an external vacuum pump. When the vacuum pump is started, a negative pressure is formed at the bottom of the tank, while the upper part of the tank is kept at normal pressure or a slight negative pressure through the vent 23. At this time, the material is forced to pass through the sintered metal filter screen 3 under the pressure difference between the upper and lower chambers. The liquid component passes through the filter screen 3 and is discharged into the receiving tank through the drain port 12, while the solid material is trapped above the filter screen 3, completing the solid-liquid separation operation.

[0032] Throughout the filtration process, the supporting flange 11 provides stable support for the filter screen 3, and the edge of the filter screen is reliably sealed to the inner wall of the tank through a sealing ring, preventing vacuum leakage. The cover 2 not only ensures the maintenance of a sealed environment but also effectively prevents the escape of volatile components from the material, improving solvent recovery rate. After filtration, the pumping is stopped while the vent 23 remains open to allow the gas pressure inside the tank to return to normal. Then, the outlet sealing cover 61 is opened, and the solid material is discharged through the outlet 6 at the lower side of the tank. The discharged sample can be directly transferred to an oven for drying or subsequent processing, making the operation safe, clean, and highly efficient.

[0033] Through the combination of the above structure and action, the vacuum filter tank of this utility model achieves rapid assembly and disassembly and automatic positioning of the filter screen assembly while maintaining vacuum sealing performance.

[0034] This device utilizes a clamping structure with a spherical end and an annular conical guide surface to synchronize the closing of the cover with the clamping of the filter screen, significantly simplifying the operation and ensuring uniform force on the filter screen and reliable sealing. Simultaneously, the use of a detachable sintered metal filter screen assembly and a flange-connected discharge structure facilitates filter screen cleaning, replacement, and material discharge. Combined with a bottom roller assembly, this enables the portable application of the suction filter tank, making it suitable for various applications such as laboratory, pilot-scale, and industrial filtration.

Claims

1. A filtration apparatus for solid-liquid separation, comprising a tank (1) and a cover (2), wherein the cover (2) is detachably and sealingly installed on the upper end of the tank (1), characterized in that: A discharge port (6) is provided in the middle of the side wall of the tank (1). The discharge port (6) is provided with a discharge port sealing cap (61) for removing the solid material remaining on the filter screen after filtration. A supporting flange (11) is provided circumferentially below the discharge port (6) on the inner wall of the tank (1). A sintered metal filter screen (3) is placed on the supporting flange (11). An annular metal frame (31) is fixed on the outer periphery of the sintered metal filter screen (3). An elastic sealing ring is provided between the supporting flange (11) and the annular metal frame (31) for sealing. An annular clamping member (5) is provided above the sintered metal filter screen (3). Several downwardly extending pressure rods (4) are provided on the inner side of the cover (2) along the circumferential direction. The ends of each pressure rod (4) cooperate with the annular clamping member (5) to press the annular clamping member (5) downward when the cover (2) is closed, so that the annular metal frame (31) and the supporting flange (11) are sealed and fixed, thereby sealing and fixing the sintered metal filter screen (3) in the tank (1); and an elastic sealing ring is provided between the annular clamping member (5) and the annular metal frame (31).

2. The filtration device for solid-liquid separation operation according to claim 1, characterized in that: The lower end of the pressure rod (4) is a ball head structure, and the upper surface of the annular pressing member (5) is provided with an annular guide surface that cooperates with the ball head, which is used to achieve automatic alignment and uniform pressing when the cover (2) is closed.

3. A filtration device for solid-liquid separation operation according to claim 2, characterized in that: The annular guide surface is an annular conical surface at an angle of 25° to 35° with the horizontal plane.

4. A filtration device for solid-liquid separation operation according to claim 1, characterized in that: The upper part of the cover (2) is provided with a liquid inlet (22) and a vent (23). The liquid inlet (22) is used to add the liquid material to be filtered into the tank (1), and the vent (23) is used to adjust the internal pressure of the tank during vacuuming and liquid drainage.

5. A filtration device for solid-liquid separation operation according to claim 1, characterized in that: The tank (1) is provided with a drain port (12) and a connecting pipe (13) connected to a vacuum pump at the bottom to achieve negative pressure filtration and liquid discharge.

6. A filtration device for solid-liquid separation operation according to claim 1, characterized in that: The pressure bar (4) has three bars evenly distributed around the circumference, and their projections in the direction of the center of the tank are distributed at 120° intervals to achieve uniform force on the annular clamping part (5).

7. A filtration device for solid-liquid separation operation according to claim 1, characterized in that: The cover (2) and the tank (1) are connected by a flange structure and sealed by bolts.

8. A filtration device for solid-liquid separation operation according to claim 1, characterized in that: The discharge port (6) and the sealing cover (61) are connected by a flange structure and are sealed by bolts.

9. A filtration apparatus for solid-liquid separation operation according to any one of claims 1 to 8, characterized in that: The bottom of the tank (1) is provided with several support legs (14) distributed circumferentially. Each support leg (14) is provided with a roller assembly (15) at its bottom for supporting and facilitating the movement of the filtration tank. The support legs (14) are connected to the tank (1) by a flange structure and fixed by bolts.

10. A filtration device for solid-liquid separation operation according to claim 9, characterized in that: The upper part of the cover (2) is provided with a handle (21) for carrying, installing and disassembling the cover.

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