Vacuum filtration device with rapidly replaceable filter

Abstract

The utility model relates to vacuum filtration technology field, concretely for the vacuum filtration device of quick replacement filter material, including receiving jar, and the extraction cover is installed on the receiving jar, and the top of receiving jar is equipped with the top jar, and the filter assembly is connected between top jar and extraction cover, and the filter assembly includes the connecting sleeve, and the end of connecting sleeve is externally equipped with a pair of guide slots, and the connecting sleeve in the top is provided with filter plate and abutment ring. The device is through the guide positioning structure that the inclined guide slot cooperates with the convex column, when the assembly is docked, need not additional tool auxiliary, can complete the alignment and fixed fast, through making filter material adopt the fixed mode of dismounting, when filter material needs replacement or adjustment specification, need not integral replacement device, only need through the lever unscrewing abutment ring, can take down old filter material and set up new filter material, and then screw up abutment ring and complete the fixation, reduce the consumable use cost, improve the adaptation flexibility of device to different filtering demand simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of vacuum filtration technology, specifically a vacuum filtration device with quickly replaceable filter media. Background Technology

[0002] Vacuum filtration devices are commonly used separation equipment in laboratories and industrial production. They utilize a vacuum pump to create a negative pressure environment, accelerating the passage of liquid through the filter media to achieve solid-liquid separation. They are widely used in chemical, pharmaceutical, and food industries, for example, in drug purification, wastewater treatment, and sample pretreatment. Compared to atmospheric pressure filtration, they shorten filtration time and provide more stable separation when processing liquids containing fine particles or with high viscosity, making them an important tool for improving separation efficiency.

[0003] Utility model patent CN219050498U discloses a vacuum filtration device and system. This device and system includes an upper cup, a receiving bottle, a filter membrane, and a filter cup interface. The filter cup interface is connected to a vacuum pump. The upper cup includes an upper opening and a lower opening, with the lower opening connected to the receiving bottle via the filter cup interface. The filter membrane is positioned above the lower opening. A filter paperboard is also provided inside the upper cup, positioned above the filter membrane. The filter paperboard includes a first filter paperboard and a second filter paperboard, with the first filter paperboard placed above the second filter paperboard. The permeability of the first filter paperboard is greater than that of the second filter paperboard. After the liquid enters the upper cup through the upper opening, the vacuum pump is activated. Under negative pressure, the liquid sequentially passes through the first filter paperboard, the second filter paperboard, and the filter membrane before entering the receiving bottle. This device directly filters cell fermentation broth through the built-in filter paperboard and filter membrane, ensuring the turbidity and purity of the liquid. The vacuum filtration process is gentle and does not damage the cells. The vacuum filtration device is a disposable consumable, requiring no cleaning, saving time and effort. A vacuum filtration system can connect multiple vacuum filtration devices through a single vacuum pump. It is easy to operate, can process multiple liquids simultaneously, improves processing efficiency, and the outer wall of the vacuum filtration device is easy to mark to avoid mixing liquids.

[0004] The current vacuum filtration device and system lacks a dedicated quick-positioning and locking structure for connecting the cup to the receiving bottle and the device to the vacuum pump. During assembly, it relies on conventional plugging and unplugging or basic docking, making it difficult to achieve quick alignment and fixation, which increases assembly time. At the same time, the filter media is fixed in the upper cup by injection molding, and the device is designed for single use. When the filter media reaches its usage limit or the filter media specifications need to be adjusted according to the feed liquid, the filter media cannot be disassembled and replaced separately. The entire device must be replaced, which not only wastes consumables but also limits the adaptability of the device to different filtration needs. In view of this, we propose a vacuum filtration device with quick-replaceable filter media. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum filtration device that allows for quick replacement of filter media, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vacuum filtration device with quick-change filter media includes a receiving tank, an extraction sleeve installed at the opening of the receiving tank, a top tank at the top of the receiving tank, and a filter assembly connected between the bottom of the top tank and the top of the extraction sleeve.

[0008] The top of the extraction sleeve is provided with a vertical tube, and two first protrusions are symmetrically provided on the outer surface of the top of the vertical tube.

[0009] The bottom end of the top tank is connected to a convex tube, and a pair of second convex pillars are symmetrically arranged on the outer surface of the bottom of the convex tube. The vertical tube and the convex tube are symmetrically arranged vertically.

[0010] The filter assembly includes a cylindrical connecting sleeve with cavities at both the top and bottom. A pair of guide grooves are formed on the outer circumferential surfaces of the top and bottom sides of the connecting sleeve. The guide groove at the top of the connecting sleeve is inclined downward in a clockwise direction around the axis of the connecting sleeve. The first end of the guide groove is connected to the end of the connecting sleeve, and the end of the guide groove is a closed horizontal groove structure. The vertical tube and the convex tube are respectively inserted into the cavities at the bottom and top. The first convex post and the second convex post can slide into the corresponding guide grooves respectively. A threaded hole is formed at the bottom of the top cavity. A through hole connecting the two cavities is formed at the bottom of the threaded hole. A filter plate is placed at the bottom of the threaded hole. A retaining ring is threadedly connected to the threaded hole above the filter plate.

[0011] Preferably, the outer peripheral surface of the receiving tank opening is threaded, the extraction sleeve is fitted over the receiving tank opening and threadedly connected to the opening, and an air extraction pipe is connected to the outer peripheral surface of the extraction sleeve, with a valve installed at the end of the air extraction pipe.

[0012] In this setup, the threaded connection allows for detachable fixing of the receiving tank and the extraction sleeve, improving connection sealing to reduce vacuum leakage. The valve at the end of the extraction pipe allows for flexible control of negative pressure on / off, adapting to filtration progress adjustment.

[0013] Preferably, the first protrusion is integrally formed with the vertical tube, and the two first protrusions are symmetrically distributed on the outside of the vertical tube with the axis of the vertical tube as the center.

[0014] In this design, the one-piece molded structure enhances the connection strength between the first protrusion and the vertical tube, and the symmetrical distribution ensures that the vertical tube is subjected to uniform force when it is connected to the filter assembly, thus preventing connection misalignment.

[0015] Preferably, the top of the top tank is threaded with a tank lid, the second protrusion is integrally formed with the protruding tube, and the two second protrusions are symmetrically distributed on the outside of the protruding tube with the axis of the protruding tube as the center.

[0016] In this design, the can lid can seal the top of the can to prevent liquid splashing and contamination, and the one-piece molding and symmetrical distribution of the second protrusion ensure the stability and accuracy of the connection between the protrusion tube and the filter assembly.

[0017] Preferably, an annular groove is provided at the outer edge of the cavity bottom of the sleeve, and a sealing ring is embedded in the annular groove. When the vertical tube or the convex tube extends into the cavity bottom of the sleeve, the end of the vertical tube or the convex tube abuts against the sealing ring, and the sealing ring is squeezed and deformed.

[0018] In this configuration, the annular groove can fix the position of the sealing ring. After the sealing ring is squeezed and deformed, it fills the gap, improves the sealing performance of the connection between the sleeve cavity and the vertical pipe and the convex pipe, and reduces vacuum leakage.

[0019] Preferably, there are two guide grooves at the end of each connecting sleeve, arranged in a circular array with the axis of the connecting sleeve as the center, and the guide grooves at the top and bottom ends of the connecting sleeve are symmetrical.

[0020] In this setup, the two guide grooves correspond one-to-one with the protruding pillars, and the circular array arrangement ensures the connection force balance. The symmetrical structure simplifies the assembly of the filter components, eliminating the need to distinguish between the up and down directions.

[0021] Preferably, the diameter of the threaded hole is larger than the diameter of the through hole, and a pair of levers are fixed to the top of the abutment ring. By tightening the abutment ring in the threaded hole, the abutment ring can press the filter plate against the bottom of the threaded hole.

[0022] In this setup, the difference in diameter between the threaded hole and the through hole provides support for the filter plate. The lever facilitates the rotation of the retaining ring, and the retaining ring presses firmly against the filter plate to prevent it from shifting, thus ensuring filtration accuracy.

[0023] Preferably, two pairs of hinge seats are symmetrically fixed on the outer peripheral surface of the connecting sleeve with the axis of the connecting sleeve as the center. The hinge seats are located directly above the end of the guide groove. Each pair of hinge seats is hinged with a lever plate. The lever plate has a pair of sleeve grooves. The two sleeve grooves correspond to the first protrusion and the second protrusion, respectively. When the first protrusion or the second protrusion is aligned and inserted, the connecting sleeve is rotated to move the first protrusion or the second protrusion along the guide groove to the end of the guide groove. When the lever plate is moved to keep the lever plate in a natural vertical state, the first protrusion and the second protrusion extend into the sleeve grooves located below and above, respectively.

[0024] In this configuration, the hinge base provides a hinged base for the dial plate, and the engagement of the sleeve groove and the protrusion can lock the position of the protrusion, preventing the protrusion from accidentally sliding at the end of the guide groove, thus further improving the connection stability.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. This vacuum filtration device with quick-change filter media uses a guide positioning structure with an inclined guide groove and a convex post. When the components are docked, the convex post can slide in quickly along the inclined guide groove, and the horizontal groove structure at the end of the guide groove can achieve instant locking. No additional tools are required, and alignment and fixation can be completed quickly, reducing the time required for assembly operations and simplifying the assembly process.

[0027] 2. This vacuum filtration device with quick-change filter media uses a detachable fixing method for the filter media. When the filter media needs to be replaced or its specifications adjusted, there is no need to replace the entire device. Simply loosen the retaining ring with the lever to remove the old filter media and place the new filter media on top. Then tighten the retaining ring to complete the fixing. This reduces the cost of consumables and improves the device's adaptability to different filtration needs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is an exploded view of the overall structure of this utility model;

[0030] Figure 3 This is an exploded view of the filter assembly in this utility model;

[0031] Figure 4 This is a cross-sectional view of the filter component in this utility model;

[0032] Figure 5 This is a cross-sectional view of the connecting sleeve in this utility model;

[0033] The meanings of the labels in the diagram are as follows:

[0034] 100. Receiving tank;

[0035] 200. Extraction sleeve; 210. Vertical pipe; 211. First protruding post; 220. Air extraction pipe;

[0036] 300. Top tank; 310. Protruding tube; 311. Second protruding post; 320. Tank lid;

[0037] 400, Filter assembly; 410, Connecting sleeve; 411, Cavity; 4111, Annular groove; 412, Guide groove; 413, Threaded hole; 4131, Through hole; 414, Hinge seat; 420, Sealing ring; 430, Filter plate; 440, Abutment ring; 441, Toggle rod; 450, Toggle plate; 451, Slot. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0039] Please see Figures 1-5 A vacuum filtration device with quick-change filter media includes a receiving tank 100, an extraction sleeve 200 installed at the opening of the receiving tank 100, and a top tank 300 located above the receiving tank 100. A filter assembly 400 is connected between the bottom of the top tank 300 and the top of the extraction sleeve 200. The receiving tank 100 is made of stainless steel, possessing good structural strength and pressure resistance, and can adapt to the negative pressure environment in vacuum scenarios, avoiding tank deformation due to pressure differences. It can also stably receive the filtered liquid, reducing the risk of material and liquid reaction. The extraction sleeve 200 and the top tank 300 are connected by the filter assembly 400 to form a sealed filtration channel that runs through the tank, providing a basic structural framework for filtering the liquid under negative pressure.

[0040] like Figure 1 and Figure 2 As shown, in this utility model, the outer circumferential surface of the receiving tank 100 is threaded. The extraction sleeve 200 is fitted onto the outside of the receiving tank 100 and threadedly connected to the tank opening. The threaded connection structure allows for the detachable fixing of the extraction sleeve 200 and the receiving tank 100, facilitating later disassembly, cleaning, or replacement of parts. The threaded fit also improves the sealing performance of the connection, reducing the risk of leakage in a vacuum environment and ensuring negative pressure stability. An extraction pipe 220 is connected to the outer circumferential surface of the extraction sleeve 200. The extraction pipe 220 is made of stainless steel, possessing good corrosion resistance and pressure resistance, and can be adapted to different acid and alkali filtration scenarios. It can also stably transmit negative pressure, preventing pipe deformation or rupture due to vacuuming. A valve is installed at the end of the extraction pipe 220, which can control the opening and closing of the extraction pipe 220, facilitating the adjustment of the vacuum degree or pausing the filtration operation according to the filtration progress, ensuring the flexibility of negative pressure control.

[0041] like Figure 2As shown, specifically, the top of the extraction sleeve 200 is provided with a vertical tube 210, which is integrally formed with the extraction sleeve 200 and made of stainless steel. It possesses excellent structural strength and pressure resistance, and is highly corrosion-resistant. It serves as a transitional structure connecting the extraction sleeve 200 and the filter assembly 400, stably adapting to pressure differences under vacuum conditions and preventing deformation or damage due to negative pressure. Two first protrusions 211 are symmetrically provided on the outer surface of the top of the vertical tube 210. These first protrusions 211 are made of stainless steel, have high hardness, and are not easily deformed. They can cooperate with the guide structure of the filter assembly 400 to achieve precise positioning and can withstand connection stress under vacuum conditions. The bottom of the top tank 300 is connected to a protrusion tube 310, which is made of high-strength plastic and injection molded to the top tank 300. It has a certain pressure resistance and can stably transfer the liquid in the top tank 300 to the filter assembly 400, while avoiding pipeline damage due to negative pressure. A pair of second protrusions 311 are symmetrically arranged on the outer surface of the bottom of the protrusion tube 310. The second protrusions 311 are also made of stainless steel and are symmetrical with the first protrusion 211. This can ensure the symmetry and stability of the connection between the top tank 300 and the filter assembly 400, and adapt to the force requirements in a vacuum environment. The first protrusion 211 is integrally formed with the vertical tube 210. The two first protrusions 211 are symmetrically distributed on the outside of the vertical tube 210 with the axis of the vertical tube 210 as the center. The symmetrical distribution structure can make the force even when the vertical tube 210 and the filter assembly 400 are connected, avoiding connection offset caused by unilateral force and ensuring sealing stability in a vacuum environment. The top of the top tank 300 is threadedly connected to a lid 320. The lid 320 is made of high-strength plastic and has a certain degree of sealing and pressure resistance. The threaded connection can seal the top tank 300 to prevent the liquid from splashing or being contaminated by the outside during the negative pressure filtration process, while also facilitating the addition of liquid. The second protrusion 311 is integrally formed with the protrusion tube 310. The two second protrusions 311 are symmetrically distributed on the outside of the protrusion tube 310 with the axis of the protrusion tube 310 as the center. This symmetrical structure is adapted to the first protrusion 211 and provides a consistent positioning reference for the filter assembly 400 to connect the vertical tube 210 and the protrusion tube 310 at the same time, ensuring the stability of the connection under vacuum. The vertical tube 210 and the protrusion tube 310 are vertically symmetrical. The vertically symmetrical structure allows the filter assembly 400 to be connected without distinguishing between the vertical and vertical directions, simplifying the assembly operation, while ensuring the force balance of the upper and lower connection parts and adapting to the vacuum environment.

[0042] like Figures 3-5As shown, the filter assembly 400 further includes a cylindrical connecting sleeve 410. The connecting sleeve 410 is made of stainless steel, possessing excellent structural strength, impact resistance, and pressure resistance. It is also highly corrosion-resistant and can adapt to pressure differences in a vacuum environment for extended periods. As the core support structure of the filter assembly 400, it can stably integrate various filter-related components, ensuring the long-term stability of the overall structure. Both the top and bottom ends of the connecting sleeve 410 are provided with cavities 411. The dimensions of the cavities 411 match the outer diameters of the vertical tube 210 and the convex tube 310, respectively, enabling precise insertion of both and providing a sealed space for connection, reducing the risk of vacuum leakage. An annular groove 4111 is provided at the outer edge of the bottom of the cavity 411. A sealing ring 420 is embedded in the annular groove 4111. The sealing ring 420 is made of oil-resistant rubber, possessing good elasticity and sealing performance. The annular groove 4111 can fix the position of the sealing ring 420, preventing it from shifting during assembly and ensuring the sealing effect in a vacuum environment.A pair of guide grooves 412 are provided on the outer peripheral surfaces of both the top and bottom sides of the connecting sleeve 410. The guide groove 412 located on the top of the connecting sleeve 410 is inclined downward in a clockwise direction with the axis of the connecting sleeve 410 as the center. The inclined guide groove 412 can guide the second protrusion 311 or the first protrusion 211 to automatically slide to the designated position during assembly, achieving quick alignment without the need for manual precise alignment. At the same time, the guide structure can ensure the stability after connection and adapt to the force in a vacuum environment. The first end of the guide groove 412 is connected to the end of the connecting sleeve 410. The end-connected structure facilitates the rapid insertion of the protrusion into the guide groove 412, reducing assembly resistance and improving assembly efficiency. The end of the guide groove 412 is a closed horizontal groove structure. This horizontal groove structure can restrict the axial movement of the protrusion after it slides in, achieving initial locking and preventing the protrusion from easily coming out after assembly, thus ensuring the stability of the connection under vacuum conditions. The vertical tube 210 and the protrusion 310 are respectively inserted into the sleeve cavity 411 located at the bottom and top. The first protrusion 211 and the second protrusion 311 can slide into their respective guide grooves 412. This mating method enables the extraction of the sleeve 20. 0. The quick connection between the top tank 300 and the filter assembly 400 requires no additional tools, and the connection structure ensures sealing under vacuum conditions. Each connecting sleeve 410 has two guide grooves 412 at its end, arranged in a circular array around the axis of the connecting sleeve 410. Each guide groove 412 corresponds to one of the two protrusions, ensuring balanced force during connection, improving connection stability, and preventing sealing failure due to uneven force under vacuum conditions. The guide grooves 412 at both ends of the connecting sleeve 410 are symmetrical, and this symmetrical structure... This ensures consistent top and bottom connection logic for the connecting sleeve 410, simplifying the operation and memorization for assembly personnel, while also guaranteeing consistent sealing performance between the upper and lower connection parts. When the vertical tube 210 or the convex tube 310 extends into the bottom of the sleeve cavity 411, the end of the vertical tube 210 or the convex tube 310 abuts against the sealing ring 420, causing the sealing ring 420 to be compressed and deformed. The compression deformation of the sealing ring 420 can fill the gap between the vertical tube 210 or the convex tube 310 and the bottom of the sleeve cavity 411, significantly improving the sealing performance of the connection part, preventing vacuum leakage from affecting filtration efficiency, and ensuring the stability of the negative pressure environment.

[0043] like Figure 4 and Figure 5As shown, a threaded hole 413 is provided at the bottom of the top cavity 411. The threaded hole 413 can mate with the abutment ring 440, providing a threaded connection basis for fixing the filter plate 430. At the same time, the threaded engagement can improve the connection sealing and reduce vacuum leakage. A through hole 4131 connecting the two cavities 411 is provided at the bottom of the threaded hole 413. The through hole 4131 allows the liquid filtered by the filter plate 430 to flow smoothly from the top cavity 411 into the bottom cavity 411, and finally into the receiving tank 100, forming a complete system. The filter channel is complete; the diameter of the threaded hole 413 is larger than that of the through hole 4131. This dimensional difference forms a stepped surface at the bottom of the threaded hole 413, providing support for the filter plate 430 and preventing the filter plate 430 from clogging the through hole 4131, thus ensuring normal flow of the liquid. The filter plate 430 is placed at the bottom of the threaded hole 413. The filter plate 430 is made of porous ceramic material, which has good filtration accuracy, temperature resistance, and pressure resistance. It can be adapted to vacuum filtration environment, effectively intercepting impurities in the liquid, while preventing the filter plate from breaking due to negative pressure. Damage; A retaining ring 440 is internally threaded into the threaded hole 413 above the filter plate 430. The retaining ring 440 is made of stainless steel, possessing good pressure resistance and corrosion resistance. The threaded connection allows for adjustment of the tightness of the retaining ring 440, facilitating the disassembly and replacement of the filter plate 430. Simultaneously, the threaded fit improves the sealing performance around the filter plate 430, reducing vacuum leakage. A pair of levers 441 are fixed to the top of the retaining ring 440. The levers 441 are welded to the retaining ring 440 and are made of stainless steel, possessing high hardness, and can serve as a force application point. The abutment ring 440 can be rotated by the operator without the need for additional tools, and can withstand the force during the tightening process. By tightening the abutment ring 440 in the threaded hole 413, the abutment ring 440 can press the filter plate 430 against the bottom of the threaded hole 413. The pressing structure can fix the position of the filter plate 430, prevent the filter plate 430 from shifting during the filtration process, which would lead to a decrease in filtration accuracy. At the same time, it can improve the fit between the filter plate 430 and the bottom of the threaded hole 413, reduce the risk of direct leakage of unfiltered liquid, and ensure the filtration effect in a vacuum environment.

[0044] like Figures 2-5As shown, it is worth noting that two pairs of hinge seats 414 are symmetrically fixed on the outer circumferential surface of the connecting sleeve 410 with the axis of the connecting sleeve 410 as the center. The hinge seats 414 are made of stainless steel and are bolted to the connecting sleeve 410. They have good structural strength and can serve as the hinge base for the lever plate 450, ensuring that the lever plate 450 can rotate flexibly outside the connecting sleeve 410, while also being able to withstand the connection stress in a vacuum environment. The hinge seats 414 are located directly above the end of the guide groove 412. This position design allows the lever plate 450 to accurately cover the guide groove after rotation. At the end of 412, a corresponding position is provided for locking the protruding post; each pair of hinge seats 414 is hinged with a lever plate 450, which is made of stainless steel, possessing excellent structural strength and corrosion resistance, moderate weight and flexible rotation, and can be stably opened and closed on the outside of the connecting sleeve 410 through the hinge structure, making it suitable for long-term use in vacuum environments; the lever plate 450 has a pair of sleeve grooves 451, the size of which matches the diameter of the first protruding post 211 and the second protruding post 311, so that they can be tightly embedded after the protruding post slides to the end of the guide groove 412, forming a tight fit. A reliable locking structure is formed; the two sleeve grooves 451 correspond to the first protrusion 211 and the second protrusion 311 respectively. The corresponding structure can ensure that after the lever plate 450 rotates, the two sleeve grooves 451 can be aligned and fitted with the first protrusion 211 and the second protrusion 311 respectively, ensuring locking accuracy; when the first protrusion 211 or the second protrusion 311 is aligned and inserted, rotating the connecting sleeve 410 causes the first protrusion 211 or the second protrusion 311 to move along the guide groove 412 to the end of the guide groove 412. The lever plate 450 is then moved to keep the lever plate 450 in place. In the vertical position, the first protrusion 211 and the second protrusion 311 extend into the lower and upper sleeve grooves 451, respectively. The lever plate 450, through the cooperation between the sleeve groove 451 and the protrusion, reliably locks the first protrusion 211 and the second protrusion 311 on the outside of the connecting sleeve 410, restricting the accidental sliding of the protrusion at the end of the guide groove 412. This further improves the stability of the connection between the connecting sleeve 410 and the vertical tube 210 and the protrusion tube 310, and avoids the displacement of the protrusion due to vibration or pressure fluctuations during the filtration process, thus ensuring the sealing effect in a vacuum environment.

[0045] In this embodiment of the vacuum filtration device with quick-change filter media, B first, the extraction sleeve 200 is threaded onto the outside of the receiving tank 100, ensuring a tight connection to guarantee a vacuum seal. Then, the valve at the end of the extraction pipe 220 is closed. Next, the filter plate 430 is placed on the bottom of the threaded hole 413 in the top cavity 411 of the connecting sleeve 410. The abutment ring 440 is tightened using the lever 441 to secure the filter plate 430, preventing displacement under vacuum conditions. Then… Align the cavity 411 at the bottom of the connecting sleeve 410 with the vertical tube 210 of the extraction sleeve 200, so that the first protrusion 211 slides into the guide groove 412 at the bottom of the connecting sleeve 410, and rotate the connecting sleeve 410 until the first protrusion 211 slides to the end of the guide groove 412; then, align the protrusion 310 at the bottom of the top can 300 with the cavity 411 at the top of the connecting sleeve 410, so that the second protrusion 311 slides into the guide groove 412 at the top of the connecting sleeve 410, and rotate the connecting sleeve 410 until the second protrusion 311 slides into the guide groove 412 at the top of the connecting sleeve 410. 11. Slide the tube to the end of the guide groove 412. At this point, move the lower lever 450 to make it vertical, allowing the first protrusion 211 to extend into the sleeve groove 451 to lock and prevent accidental sliding of the first protrusion 211, ensuring a vacuum seal at the bottom connection. Simultaneously, the second protrusion 311 extends into the sleeve groove 451 to lock and prevent accidental sliding of the second protrusion 311, ensuring a vacuum seal at the top connection. Then, open the tank lid 320 and add the liquid to be filtered into the top tank 300, then close the tank lid 320. Finally... Connect the suction pipe 220 to the vacuum pump, open the valve at the end of the suction pipe 220, start the vacuum pump to form a stable negative pressure, and the liquid material passes through the top tank 300, the convex pipe 310, the top sleeve cavity 411, the filter plate 430, the through hole 4131, the bottom sleeve cavity 411, the vertical pipe 210, and the extraction sleeve 200 in sequence under the negative pressure, and finally flows into the receiving tank 100 to complete the filtration. After the filtration is completed, first turn off the vacuum pump, then close the valve, and disassemble each part to carry out the subsequent filter plate replacement or cleaning operation.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum filtration device with quick-change filter media, including a receiving tank (100), characterized in that: The receiving tank (100) is equipped with a extraction sleeve (200) at the opening, and a top tank (300) is provided above the receiving tank (100). A filter assembly (400) is connected between the bottom of the top tank (300) and the top of the extraction sleeve (200). The top of the extraction sleeve (200) is provided with a vertical tube (210), and two first protrusions (211) are symmetrically provided on the outer surface of the top of the vertical tube (210). The bottom end of the top tank (300) is connected to a convex tube (310), and a pair of second convex pillars (311) are symmetrically arranged on the outer surface of the bottom of the convex tube (310). The vertical tube (210) and the convex tube (310) are symmetrically arranged vertically. The filter assembly (400) includes a cylindrical connecting sleeve (410). Both the top and bottom ends of the connecting sleeve (410) have cavities (411). A pair of guide grooves (412) are formed on the outer peripheral surfaces of both the top and bottom sides of the connecting sleeve (410). The guide groove (412) located at the top of the connecting sleeve (410) slopes downwards clockwise around the axis of the connecting sleeve (410). The first end of the guide groove (412) is connected to the end of the connecting sleeve (410), and the end of the guide groove (412) is a closed horizontal groove structure. The vertical pipe... (210) and the protruding tube (310) are respectively inserted into the sleeve cavity (411) located at the bottom and the top. The first protruding post (211) and the second protruding post (311) can slide into the corresponding guide groove (412) respectively. A threaded hole (413) is provided at the bottom of the top sleeve cavity (411). A through hole (4131) connecting the two sleeve cavities (411) is provided at the bottom of the threaded hole (413). A filter plate (430) is placed at the bottom of the threaded hole (413). A retaining ring (440) is threadedly connected in the threaded hole (413) above the filter plate (430).

2. The vacuum filtration device with quick-change filter media according to claim 1, characterized in that: The outer circumferential surface of the receiving tank (100) is threaded. The extraction sleeve (200) is fitted outside the opening of the receiving tank (100) and threadedly connected to the opening. An air extraction pipe (220) is connected to the outer circumferential surface of the extraction sleeve (200), and a valve is installed at the end of the air extraction pipe (220).

3. The vacuum filtration device with quick-change filter media according to claim 1, characterized in that: The first protrusion (211) is integrally formed with the vertical tube (210), and the two first protrusions (211) are symmetrically distributed on the outside of the vertical tube (210) with the axis of the vertical tube (210) as the center.

4. The vacuum filtration device with quick-change filter media according to claim 1, characterized in that: The top of the top tank (300) is threadedly connected to a can lid (320). The second protrusion (311) is integrally formed with the protrusion tube (310). The two second protrusions (311) are symmetrically distributed on the outside of the protrusion tube (310) with the axis of the protrusion tube (310) as the center.

5. The vacuum filtration device with quick-change filter media according to claim 1, characterized in that: An annular groove (4111) is provided at the outer edge of the cavity bottom of the sleeve (411). A sealing ring (420) is embedded in the annular groove (4111). When the vertical tube (210) or the convex tube (310) extends into the cavity bottom of the sleeve (411), the end of the vertical tube (210) or the convex tube (310) abuts against the sealing ring (420) and causes the sealing ring (420) to be squeezed and deformed.

6. The vacuum filtration device with quickly replaceable filter media according to claim 1, characterized in that: The number of guide grooves (412) at the end of each connecting sleeve (410) is two, and they are arranged in a circular array with the axis of the connecting sleeve (410) as the center. The guide grooves (412) at the top and bottom ends of the connecting sleeve (410) are symmetrical.

7. The vacuum filtration device with quick-change filter media according to claim 1, characterized in that: The diameter of the threaded hole (413) is larger than that of the through hole (4131). A pair of levers (441) are fixed at the top of the abutment ring (440). By tightening the abutment ring (440) in the threaded hole (413), the abutment ring (440) can press the filter plate (430) against the bottom of the threaded hole (413).

8. The vacuum filtration device with quick-change filter media according to claim 1, characterized in that: Two pairs of hinge seats (414) are symmetrically fixed on the outer peripheral surface of the connecting sleeve (410) with the axis of the connecting sleeve (410) as the center. The hinge seats (414) are located directly above the end of the guide groove (412). Each pair of hinge seats (414) is hinged with a lever plate (450). The lever plate (450) has a pair of sleeve grooves (451). The two sleeve grooves (451) correspond to the first protrusion (211) and the second protrusion (311) respectively. When the... After the first protrusion (211) or the second protrusion (311) is aligned and inserted, the connecting sleeve (410) is rotated to move the first protrusion (211) or the second protrusion (311) along the guide groove (412) to the end of the guide groove (412). When the dial plate (450) is kept in a natural vertical state by turning the dial plate (450), the first protrusion (211) and the second protrusion (311) extend into the sleeve groove (451) located below and above, respectively.

Images