Continuous sample injection suction filtration device

Abstract

The utility model relates to the field of suction filtration equipment, and discloses a continuous sample injection suction filtration device which comprises a sample injection cup, a filtering mechanism, a connecting cup, a collecting bottle and a vacuum pump, the top and the bottom of the sample injection cup are each of an opening structure, the filtering mechanism is arranged at the bottom of the sample injection cup, and the top and the bottom of the connecting cup are each of an opening structure; the connecting cup is arranged at the bottom of the filtering mechanism, the top of the collecting bottle is of an opening structure, the collecting bottle is installed at the bottom of the connecting cup in a threaded mode, the filtering mechanism comprises an upper-layer glass cover, a lower-layer glass cover, an assembly disc and three filtering membranes, the bottom of the upper-layer glass cover is of an opening structure, and the top of the lower-layer glass cover is of an opening structure. The device has the following advantages and effects: high-efficiency suction filtration of a sample solution can be realized, switching use of the three filter membranes is facilitated, the operation is simple and convenient, the filter membranes do not need to be replaced after shutdown, the working efficiency is remarkably improved, and the effect of continuous sample injection is realized.

Description

Technical Field

[0001] This application relates to the field of vacuum filtration equipment technology, and in particular to a vacuum filtration device with continuous sample injection. Background Technology

[0002] In many fields such as chemical experiments, biopharmaceuticals, and environmental monitoring, vacuum filtration is a commonly used solid-liquid separation method that requires a vacuum filtration device. Although traditional vacuum filtration devices meet the basic requirements for filtering sample solutions, they still have at least the following shortcomings in practical use: If the filter membrane becomes clogged during the filtration process, it can easily cause the filtration operation to be interrupted. Often, it is necessary to stop the machine, disassemble the entire device, replace or clean the filter membrane before filtration can continue. The operation process is cumbersome and time-consuming, continuous sample injection is not possible, and the filtration efficiency is low.

[0003] Therefore, we propose a continuous injection filtration device to solve the above problems. Utility Model Content

[0004] The purpose of this application is to provide a continuous injection filtration device that can achieve efficient filtration of sample solutions, facilitates the switching of three filter membranes, is simple and convenient to operate, does not require stopping the machine to replace filter membranes, significantly improves working efficiency, and achieves the effect of continuous injection.

[0005] The above-mentioned technical objective of this application is achieved through the following technical solution: a continuous sample injection filtration device, comprising a sample injection cup, a filtration mechanism, a connecting cup, a collection bottle, and a vacuum pump. The top and bottom of the sample injection cup are both open. The filtration mechanism is disposed at the bottom of the sample injection cup. The top and bottom of the connecting cup are both open. The connecting cup is disposed at the bottom of the filtration mechanism. The top of the collection bottle is open, and the collection bottle is threaded onto the bottom of the connecting cup. The filtration mechanism includes an upper glass cover, a lower glass cover, an assembly plate, and three filter membranes. The bottom of the upper glass cover is open, and the top of the lower glass cover is open. The sample inlet cup is fixedly connected to the upper glass cover by screw one, and the lower glass cover is fixedly connected to the bottom of the upper glass cover by screw two. The assembly tray is located inside the upper glass cover, and the top of the assembly tray slides and seals against the inner wall of the top of the upper glass cover. The top of the assembly tray has three through holes that are evenly spaced and distributed in a ring. The three filter membranes are fixedly installed at the bottom of the assembly tray, and the three filter membranes are located directly below the corresponding through holes. The top of the upper glass cover has a discharge hole one that communicates with the sample inlet cup, and the discharge hole one communicates with one of the through holes. The bottom of the lower glass cover has a discharge hole two that communicates with the connecting cup.

[0006] A further feature of this application is that: a cup cap is threaded onto the top of the injection cup, an inlet pipe is fixedly installed at the center of the top of the cup cap, a suction hose is fixedly connected to the top of the inlet pipe, a plug is fixedly installed on the inner wall of the top of the cup cap, the plug is located inside the injection cup, the bottom end of the inlet pipe passes through the plug, and a frosted surface is provided on both the outer wall of the plug and the inner wall of the top of the injection cup, the two frosted surfaces being compatible with each other.

[0007] A further feature of this application is that: a circular hole is provided at the top center of the upper glass cover, and a rotating shaft is rotatably installed in the circular hole via a bearing. The bottom end of the rotating shaft is fixedly connected to the top center of the assembly plate, and a knob is fixedly installed at the top end of the rotating shaft. A damping ring is fixedly fitted on the outer side wall of the assembly plate, and the outer ring of the damping ring makes damping sliding contact with the inner side wall of the upper glass cover.

[0008] A further provision of this application is that: an annular sealing groove is provided at the bottom of the upper glass cover, and a sealing ring is fixedly installed at the top of the lower glass cover, with the sealing ring slidably installed in the annular sealing groove.

[0009] A further feature of this application is that a frosted convex ring is fixedly installed on the top of the upper glass cover, the frosted convex ring is connected to the discharge hole, and an annular frosted groove is provided at the bottom of the sample cup, and the frosted convex ring is slidably installed in the annular frosted groove.

[0010] A further feature of this application is that a liquid guiding funnel connected to the discharge hole two is fixedly installed at the bottom of the lower glass cover, and the bottom end of the liquid guiding funnel passes through the connecting cup and extends into the collection bottle.

[0011] A further feature of this application is that the connecting cup is fixedly connected to the bottom of the lower glass cover by three screws, an air outlet pipe is fixedly installed on one side of the connecting cup, one end of the air outlet pipe extends into the connecting cup, and an air suction hose is fixedly connected to the suction end of the vacuum pump, with one end of the air suction hose fixedly connected to the other end of the air outlet pipe.

[0012] A further feature of this application is that a frosted convex ring 2 is fixedly installed on the top of the connecting cup, and an annular frosted groove 2 is opened at the bottom of the lower glass cover, with the frosted convex ring 2 slidably installed in the annular frosted groove 2.

[0013] A further provision of this application is that a limiting ring is fixedly installed on the inner wall of the connecting cup, and the top of the collecting bottle abuts against the bottom of the limiting ring.

[0014] A further feature of this application is that the bottom of the limiting ring and the top of the collection bottle are both provided with a frosted surface II, and the two frosted surfaces II are compatible with each other.

[0015] This application includes at least one of the following beneficial technical effects:

[0016] 1. This application achieves efficient filtration of sample solutions through the synergistic action of the sample injection cup, filtration mechanism, connecting cup, collection bottle, vacuum pump, cup lid, liquid inlet tube, and liquid extraction hose. It also facilitates the switching of three filter membranes, making operation simple and convenient. There is no need to stop the machine to replace the filter membrane, which significantly improves work efficiency and achieves the effect of continuous sample injection.

[0017] 2. The liquid-guiding funnel design in this application can effectively guide the filtered sample solution to flow smoothly into the collection bottle, prevent the filtered sample solution from being sucked into the exhaust pipe, ensure the stable operation of the vacuum pump, and guarantee the smooth progress of the filtration operation.

[0018] 3. The design of the plug, frosted surface one, sealing ring, frosted convex ring one, annular frosted groove one, frosted convex ring two, and annular frosted groove two in this application ensures the sealing performance of the sample cup, filter mechanism, connecting cup, collection bottle, vacuum pump, and cup lid connection.

[0019] 4. This application utilizes the synergistic effect of screw one, screw two, screw three, the threaded connection between the collection bottle and the connecting cup, and the threaded connection between the cup cap and the sample inlet cup to facilitate the overall assembly and disassembly of the filtration device, making it easy to operate and highly practical. Attached Figure Description

[0020] Figure 1 This is a front-view stereoscopic structural diagram of this embodiment.

[0021] Figure 2 This is a front view sectional three-dimensional structural schematic diagram of this embodiment.

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the cup lid.

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the sample inlet cup.

[0024] Figure 5 This is a front view sectional three-dimensional structural diagram of the filtration mechanism.

[0025] Figure 6 This is a three-dimensional structural diagram of the assembly tray.

[0026] Figure 7 This is a first-person perspective 3D structural diagram of the connecting cup.

[0027] Figure 8 This is a second-view 3D structural diagram of the connecting cup.

[0028] Figure 9 This is a schematic diagram of the three-dimensional structure of the collection bottle.

[0029] In the diagram, 1. Sample inlet cup; 101. Annular frosted groove one; 2. Filtration mechanism; 201. Upper glass cover; 202. Lower glass cover; 203. Screw two; 204. Rotating shaft; 205. Knob; 206. Assembly plate; 207. Through hole; 208. Filter membrane; 209. Feed hole one; 210. Feed hole two; 211. Damping ring; 212. Sealing ring; 213. Frosted convex ring one; 214. Liquid guiding funnel; 215. Annular frosted groove two; 3. Connecting cup; 301. Frosted convex ring two; 302. Limiting ring; 4. Collection bottle; 5. Vacuum pump; 6. Cup lid; 7. Liquid inlet pipe; 8. Liquid extraction hose; 9. Plug; 10. Frosted surface one; 11. Screw one; 12. Screw three; 13. Gas outlet pipe; 14. Gas extraction hose; 15. Frosted surface two. Detailed Implementation

[0030] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] See Figures 1-9 This application provides a continuous sample injection filtration device, including a sample injection cup 1, a filtration mechanism 2, a connecting cup 3, a collection bottle 4, and a vacuum pump 5. The top and bottom of the sample injection cup 1 are both open, and the bottom opening diameter of the sample injection cup 1 is smaller than the top opening diameter. The filtration mechanism 2 is located at the bottom of the sample injection cup 1. The top and bottom of the connecting cup 3 are both open, and the connecting cup 3 is located at the bottom of the filtration mechanism 2. The top of the collection bottle 4 is open, and the collection bottle 4 is threadedly installed at the bottom of the connecting cup 3. It should be noted that an internal thread is provided on the inner side wall of the bottom of the connecting cup 3, and an external thread is provided on the outer side wall of the top of the collection bottle 4. The external thread is adapted to the internal thread, thereby facilitating the assembly and disassembly of the collection bottle 4.

[0032] In this embodiment, the filtration mechanism 2 includes an upper glass cover 201, a lower glass cover 202, an assembly tray 206, and three filter membranes 208. The bottom of the upper glass cover 201 is open, and the top of the lower glass cover 202 is open. The sample cup 1 is fixedly connected to the upper glass cover 201 by screw 11, and the lower glass cover 202 is fixedly connected to the bottom of the upper glass cover 201 by screw 203. The design of screw 203 facilitates easy assembly and disassembly of the lower glass cover 202 and the upper glass cover 201. The assembly tray 206 is located inside the upper glass cover 201, and the top of the assembly tray 206 slides and seals against the inner top wall of the upper glass cover 201. The top of the assembly tray 206 has three equally spaced annular openings. The distributed through holes 207 and three filter membranes 208 are all fixedly installed at the bottom of the assembly plate 206, and the three filter membranes 208 are respectively located directly below the corresponding through holes 207. The function of the filter membranes 208 is to effectively filter impurities in the extracted sample solution. The top of the upper glass cover 201 is provided with a discharge hole 209 that communicates with the sample cup 1. The discharge hole 209 communicates with one of the through holes 207. The bottom of the lower glass cover 202 is provided with a discharge hole 210 that communicates with the connecting cup 3. The diameter of the discharge hole 209 is smaller than the diameter of the through hole 207 and also smaller than the diameter of the bottom opening of the sample cup 1. The diameter of the filter membrane 208 is larger than the diameter of the through hole 207.

[0033] In this embodiment, a cup lid 6 is threaded onto the top of the sample cup 1. It should be noted that an internal thread is provided on the inner side wall of the cup lid 6, and an external thread is provided on the outer side wall of the top of the sample cup 1. The external thread is adapted to the internal thread, thereby facilitating the disassembly and assembly of the cup lid 6. An inlet pipe 7 is fixedly installed at the center of the top of the cup lid 6. A suction hose 8 is fixedly connected to the top of the inlet pipe 7. The end of the suction hose 8 away from the inlet pipe 7 is connected to the sample solution. The sample solution can enter the sample cup 1 through the suction hose 8 and the inlet pipe 7 in sequence. A plug 9 is fixedly installed on the inner side wall of the top of the cup lid 6. The plug 9 is located inside the sample cup 1. The bottom end of the inlet pipe 7 passes through the plug 9. Both the outer side wall of the plug 9 and the inner side wall of the top of the sample cup 1 are provided with a frosted surface 10. The two frosted surfaces 10 are adapted to each other. The design of the plug 9 and the frosted surface 10 ensures the sealing performance of the connection between the cup lid 6 and the sample cup 1.

[0034] In this embodiment, a circular hole is provided at the center of the top of the upper glass cover 201. A rotating shaft 204 is rotatably mounted in the circular hole via a bearing. The bottom end of the rotating shaft 204 is fixedly connected to the center of the top of the assembly plate 206. A knob 205 is fixedly mounted at the top of the rotating shaft 204. A damping ring 211 is fixedly fitted on the outer wall of the assembly plate 206. The outer ring of the damping ring 211 makes damping sliding contact with the inner wall of the upper glass cover 201. The assembly plate 206 can be rotated via the rotating shaft 204 and the knob 205, so that the material discharge hole 209 at the top of the upper glass cover 201 can be connected sequentially to the three through holes 207. The assembly tray 206 allows for the switching of three filter membranes 208. When one filter membrane 208 becomes clogged, the assembly tray 206 can be quickly rotated to switch to another filter membrane 208 for continued filtration without requiring machine downtime for membrane replacement, significantly improving work efficiency and achieving continuous sample injection. The damping ring 211, in damped sliding contact with the inner wall of the upper glass cover 201, ensures the stability of the assembly tray 206's rotation, making the filter membrane 208 switching process smooth and reliable, preventing filtration effects from being affected by shaking, and effectively preventing the knob 205, shaft 204, and assembly tray 206 from rotating independently.

[0035] In this embodiment, an annular sealing groove is provided at the bottom of the upper glass cover 201, and a sealing ring 212 is fixedly installed at the top of the lower glass cover 202. The sealing ring 212 is slidably installed in the annular sealing groove, which ensures the sealing performance of the connection between the lower glass cover 202 and the upper glass cover 201.

[0036] In this embodiment, a frosted convex ring 213 is fixedly installed on the top of the upper glass cover 201. The frosted convex ring 213 is connected to the discharge hole 209. An annular frosted groove 101 is provided at the bottom of the sample cup 1. The frosted convex ring 213 is slidably installed in the annular frosted groove 101. The design of the frosted convex ring 213 and the annular frosted groove 101 ensures the sealing performance of the sample cup 1 and the upper glass cover 201 in the connection state.

[0037] In this embodiment, a liquid guiding funnel 214 connected to the discharge hole 210 is fixedly installed at the bottom of the lower glass cover 202. The bottom end of the liquid guiding funnel 214 passes through the connecting cup 3 and extends into the collection bottle 4. The design of the liquid guiding funnel 214 can effectively guide the filtered sample solution to flow smoothly into the collection bottle 4 and prevent the filtered sample solution from being sucked into the exhaust pipe 13.

[0038] In this embodiment, the connecting cup 3 is fixedly connected to the bottom of the lower glass cover 202 by screw 3 12. The design of screw 3 12 facilitates the easy assembly and disassembly of the connecting cup 3 and the lower glass cover 202. An exhaust pipe 13 is fixedly installed on one side of the connecting cup 3, and one end of the exhaust pipe 13 extends into the connecting cup 3. The suction end of the vacuum pump 5 is fixedly connected to the suction hose 14, and one end of the suction hose 14 is fixedly connected to the other end of the exhaust pipe 13. By operating the vacuum pump 5, the air in the internal space of the sample cup 1, the filter mechanism 2, the connecting cup 3, and the collection bottle 4 can be quickly and effectively extracted to form a negative pressure environment, thereby achieving efficient filtration of the sample solution.

[0039] In this embodiment, a frosted convex ring 301 is fixedly installed on the top of the connecting cup 3, and an annular frosted groove 215 is provided at the bottom of the lower glass cover 202. The frosted convex ring 301 is slidably installed in the annular frosted groove 215. The design of the frosted convex ring 301 and the annular frosted groove 215 ensures the sealing performance of the connecting cup 3 and the lower glass cover 202 in the connection state.

[0040] In this embodiment, a limiting ring 302 is fixedly installed on the inner side wall of the connecting cup 3. The top of the collecting bottle 4 abuts against the bottom of the limiting ring 302. The limiting ring 302 is designed to limit the depth to which the top of the collecting bottle 4 is screwed into the connecting cup 3. Both the bottom of the limiting ring 302 and the top of the collecting bottle 4 are provided with a second frosted surface 15. The two second frosted surfaces 15 are compatible with each other. The design of the second frosted surface 15 ensures the sealing performance of the connecting cup 3 when the collecting bottle 4 is connected to the connecting cup 3.

[0041] In this embodiment, it should be noted that the sample inlet cup 1, connecting cup 3, collection bottle 4, cup cap 6, plug 9, upper glass cover 201, lower glass cover 202, assembly tray 206, and liquid guiding funnel 214 are all made of transparent tempered glass. During use, it is convenient to observe the liquid extraction and filtration inside the device. In addition, a volume scale line (not shown in this article) can be set on the outer wall of the collection bottle 4 to facilitate observation and knowledge of the volume of the collected sample solution.

[0042] With the above structure, the working principle of the continuous injection filtration device provided in this application is as follows:

[0043] First, insert one end of the suction hose 8 into the sample solution, and then start the vacuum pump 5 to quickly and effectively extract the air from the internal space of the sample cup 1, filter mechanism 2, connecting cup 3, and collection bottle 4, creating a negative pressure environment inside. Under the action of the external pressure difference, the sample solution enters the sample cup 1 through the suction hose 8 and the inlet pipe 7 in sequence. The sample solution in the sample cup 1 then passes through the discharge hole 1 209, the through hole 207 located directly below the discharge hole 1 209, the filter membrane 208, and the discharge hole 210 in sequence. The filter membrane 208 can intercept and filter impurities in the sample solution, so that the impurities remain above the filter membrane 208. The filtered sample solution enters the liquid guiding funnel 214, and the liquid guiding funnel 214 guides the filtered sample solution to the collection bottle 4 for storage.

[0044] During the above-mentioned filtration of sample solution, when the filter membrane 208 located directly below the feed hole 209 becomes clogged, the knob 205 can be manually turned. The knob 205 drives the rotating shaft 204 and the assembly plate 206 to rotate horizontally, and the three filter membranes 208 below the assembly plate 206 will rotate accordingly. When another filter membrane 208 is rotated to be directly below the feed hole 209, the knob 205 can be stopped. A clean filter membrane 208 can then be used to continue filtering the extracted sample solution. This facilitates the switching of the three filter membranes 208, making the operation simple and convenient. There is no need to stop the machine to replace the filter membrane 208, which significantly improves the working efficiency and achieves the effect of continuous sample injection.

[0045] After collecting a suitable volume of filtered sample solution in the collection bottle 4, stop the vacuum pump 5 and unscrew the collection bottle 4 from the bottom of the connecting cup 3 to facilitate subsequent work.

Claims

1. A continuous sample-infiltration filtration apparatus, characterized by, The utility model provides a kind of vacuum filtration device, including sample cup (1), filter mechanism (2), connecting cup (3), collection bottle (4) and vacuum pump (5), the top and bottom of the sample cup (1) are open structure, the filter mechanism (2) is arranged in the bottom of the sample cup (1), the top and bottom of the connecting cup (3) are open structure, the connecting cup (3) is arranged in the bottom of the filter mechanism (2), the top of the collection bottle (4) is open structure, the collection bottle (4) is threadedly installed in the bottom of the connecting cup (3), the filter mechanism (2) includes upper glass cover (201), lower glass cover (202), assembly disc (206) and three filter membranes (208), the bottom of the upper glass cover (201) is open structure, the top of the lower glass cover (202) is open structure, the sample cup (1) is fixedly connected with the upper glass cover (201) by screw one (11), the lower glass cover (202) is fixedly connected in the bottom of the upper glass cover (201) by screw two (203), the assembly disc (206) is located in the upper glass cover (201), the top of the assembly disc (206) is in sliding seal contact with the inner wall of the top of the upper glass cover (201), the top of the assembly disc (206) is penetrated and is equipped with three equidistant annular distribution through-holes (207), three filter membranes (208) are fixedly installed in the bottom of the assembly disc (206), and three filter membranes (208) are located below the corresponding through-hole (207) respectively, the top of the upper glass cover (201) is equipped with first discharging hole (209) being communicated with sample cup (1), the first discharging hole (209) is communicated with one of the through-holes (207), the bottom of the lower glass cover (202) is equipped with second discharging hole (210) being communicated with connecting cup (3).

2. The continuous sample-inletting filtration device according to claim 1, characterized by: The top of the sample cup (1) is threadedly installed with cup cover (6), the top center of the cup cover (6) is fixedly installed with liquid inlet pipe (7), the top end of the liquid inlet pipe (7) is fixedly connected with liquid suction hose (8), the inner wall on the top of the cup cover (6) is fixedly installed with plug (9), the plug (9) is located in the sample cup (1), the bottom end of the liquid inlet pipe (7) penetrates the plug (9), the outer side wall of the plug (9) and the inner side wall on the top of the sample cup (1) are both provided with ground face one (10), two ground face one (10) are adapted.

3. The continuous sample-infiltration filtration device of claim 1, wherein: The top center of the upper glass cover (201) is equipped with round hole, the round hole is rotatably installed with rotating shaft (204) through bearing, the bottom end of the rotating shaft (204) is fixedly connected with the top center of the assembly disc (206), the top end of the rotating shaft (204) is fixedly installed with knob (205), the outer side wall of the assembly disc (206) is fixedly installed with damping ring (211), the outer ring of the damping ring (211) and the inner side wall of the upper glass cover (201) are in damping sliding contact.

4. The continuous sample-feeding filtration device of claim 1, wherein: The bottom of the upper glass cover (201) is provided with an annular sealing groove, and the top of the lower glass cover (202) is fixedly provided with a sealing ring (212) which is slidingly installed in the annular sealing groove.

5. The continuous sample-feeding filtration device of claim 1, wherein: The top of the upper glass cover (201) is fixedly provided with a frosted convex ring I (213) which is communicated with the lower hole I (209), and the bottom of the sample cup (1) is provided with an annular frosted concave groove I (101) in which the frosted convex ring I (213) is slidingly installed.

6. The continuous sample-feeding filtration device of claim 1, wherein: The bottom of the lower glass cover (202) is fixedly provided with a liquid guide funnel (214) which is communicated with the lower hole II (210), and the bottom end of the liquid guide funnel (214) is connected with a connecting cup (3) and extends into the collecting bottle (4).

7. The continuous sample-infiltration filtration device of claim 1, wherein: The connecting cup (3) is fixedly connected to the bottom of the lower glass cover (202) by a screw III (12), one side of the connecting cup (3) is fixedly provided with an air outlet pipe (13) which extends into the connecting cup (3), and the air suction end of the vacuum pump (5) is fixedly connected with an air exhaust hose (14) whose one end is fixedly connected with the other end of the air outlet pipe (13).

8. The continuous sample introduction filtration device of claim 1, wherein: The top of the connecting cup (3) is fixedly provided with a frosted convex ring II (301), and the bottom of the lower glass cover (202) is provided with an annular frosted concave groove II (215) in which the frosted convex ring II (301) is slidingly installed.

9. The continuous sample-feeding filtration apparatus of claim 1, wherein: The inner side wall of the connecting cup (3) is fixedly provided with a limiting stop ring (302), and the top of the collecting bottle (4) abuts against the bottom of the limiting stop ring (302).

10. The continuous sample-inletting filtration device according to claim 9, characterized by: The bottom of the limiting stop ring (302) and the top of the collecting bottle (4) are both provided with frosted surfaces II (15), and the two frosted surfaces II (15) are adapted to each other.

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