Filtering device for chemical experiment

Abstract

The utility model discloses a filter device for chemical experiments, which relates to the technical field of chemical experiments and comprises a chassis, a filter disc is clamped on the chassis, a top frame and a pressing mechanism are clamped on the filter disc, the pressing mechanism comprises a connecting rod, a pressing block and a cam, the connecting rod is connected onto a connecting disc, the pressing block is slidably sleeved on the outer side wall of the connecting rod, and the cam is connected onto the connecting disc. The cams are rotationally connected to the upper portions of the connecting rods, the pressing blocks are clamped to the edge of the upper end of the top frame by rotating the connecting rods, and the cams are rotated to drive the pressing blocks to apply downward pressure to the lower top frame and the filter disc, so that the top frame and the filter disc are tightly connected to the upper end of the bottom disc. When the outer side walls, farthest from the rotating circle center, of the cams are attached to the pressing blocks, the pressure applied to the pressing blocks by the multiple cams is consistent, and the problems that when a filtering disc is pressed by an existing filtering device for the chemical experiment, tools are mostly needed for operation, the pressure applied to the filtering disc by the multiple pressing blocks is not uniform due to manual screwing of nuts, and the installation stability is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical experiment technical field, concretely is a filter device for chemical experiment. BACKGROUND

[0002] In chemical experiments, a filter device is an important tool for separating solid and liquid mixtures. It selectively prevents solid particles by passing through the pores or filter membranes, and separates by the flow of liquid. Common filter devices include funnels, filter paper, vacuum filter devices, microfiltration devices, etc. Impurities and suspended solids are removed by filtration to improve the purity of the liquid. Before subsequent analysis (such as spectroscopic analysis, chromatographic analysis, etc.), filtration can remove solid impurities that may interfere with the results. In some experiments, the use of filter devices can also protect downstream equipment (such as pumps, pipelines, etc.) from damage by solid particles. It has the advantages of high efficiency, simplicity, repeatability, strong adaptability, safety, etc.

[0003] Most of the existing filter devices for chemical experiments include gravity filtration, vacuum filtration, microfiltration, membrane filtration, ultrafiltration, and nanofiltration. Gravity filtration uses gravity to make liquid pass through multiple filter papers or filter membranes for filtration, and is suitable for the separation of larger particles. The reference model is CT-500 filter. Multiple filter discs in the filter need to be tightly connected to ensure that the chemical liquid passes through the filter paper while preventing liquid leakage. However, in the existing filter devices for chemical experiments, when the filter discs are tightened, a nut is mostly used to rotate, causing the pressing blocks to move downward and apply pressure to the multiple filter discs for tightening. However, the nut needs to be operated with a tool (wrench), and manually tightening the nut can also cause uneven pressure on the multiple pressing blocks to the filter discs. To solve the above-mentioned problems, the present application provides a filter device for chemical experiments. SUMMARY

[0004] The utility model aims at providing a filter device for chemical experiments to solve the problem of the existing filter device for chemical experiments, which mostly needs to be operated with a tool when tightening the filter discs, and manually tightening the nut can also cause uneven pressure on the multiple pressing blocks to the filter discs, resulting in poor installation stability.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a filter device for chemical experiments, comprising a base plate, a connecting plate is arranged at the upper end of the base plate, a plurality of filter discs are clamped at the upper end of the connecting plate, and a top frame is clamped at the upper end of the uppermost filter disc;

[0006] A pressing mechanism is arranged in a circular array around the base plate. The pressing mechanism comprises a connecting rod, a pressing block, and a cam. One end of the connecting rod is rotatably connected to the outer sidewall of the connecting plate. The pressing block is slidably connected to the outer sidewall of the connecting rod. The cam is rotatably connected above the connecting rod.

[0007] The rotating connecting rod makes the pressing block clamped at the upper end edge of the top frame, and the rotating cam drives the pressing block to exert downward pressure on the lower top frame and the filter disc, so that the top frame and the filter disc are tightly connected to the upper end of the bottom disc.

[0008] As a preferred technical scheme of the utility model, the filter disc comprises a chuck, filter paper and a material guide disc, the upper end of the chuck is provided with a mounting groove, the filter paper is clamped in the mounting groove of the chuck, the material guide disc is clamped at the upper end of the chuck, and the lower end of the material guide disc is pressed against the upper end of the filter paper.

[0009] As a preferred technical scheme of the utility model, the upper end of the material guide disc is provided with a plurality of through holes which are annularly and uniformly distributed.

[0010] As a preferred technical scheme of the utility model, the outer side wall of the cam is fixedly connected with a pull rod for controlling the rotation of the cam.

[0011] As a preferred technical scheme of the utility model, the inner side of the pull rod is fixedly connected with a sliding rod, the outer side wall of the sliding rod is slidingly sleeved with a sleeve, and the end of the connecting rod away from the bottom disc is fixedly connected with a protrusion matched with the sleeve.

[0012] As a preferred technical scheme of the utility model, the upper end of the sleeve is fixedly connected with a clamping block, and the inner side wall of the pull rod is provided with a clamping hole matched with the clamping block.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The utility model discloses a rotating connecting rod makes the pressing block clamped at the upper end edge of the top frame, and the rotating cam drives the pressing block to exert downward pressure on the lower top frame and the filter disc, so that the top frame and the filter disc are tightly connected to the upper end of the bottom disc, the plurality of cams are consistent in specification, when the cam is rotated, the outer side wall of the cam farthest from the rotation center is attached to the pressing block, the plurality of cams uniformly exert pressure on the pressing block, and the problems of the prior art chemical experiment filter device, manual nut tightening and uneven pressure exerted on the filter disc by the plurality of pressing blocks are solved. ACCURACY OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the filter device of the utility model embodiment;

[0016] Figure 2 It is a partial explosion view of the filter device of the utility model embodiment;

[0017] Figure 3 It is a structure schematic view of the bottom disc of the utility model embodiment;

[0018] Figure 4This is an exploded view of the filter disc according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the pressing mechanism structure according to an embodiment of the present utility model;

[0020] Figure 6 This is an embodiment of the present utility model. Figure 5 Enlarged view of point A in the middle;

[0021] Figure 7 This is a partial structural diagram of the clamping mechanism according to an embodiment of the present utility model.

[0022] In the diagram: 1. Chassis; 11. Top frame; 12. Internal threaded cylinder; 2. Filter disc; 21. Chuck; 22. Filter paper; 23. Guide disc; 3. Pressing mechanism; 31. Connecting rod; 311. Protrusion; 32. Pressing block; 33. Cam; 34. Pull rod; 341. Slide rod; 35. Sleeve; 351. Clamping block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-7 This embodiment provides a filtration device for chemical experiments, including a base 1 with a funnel-shaped structure. A connecting plate is fixedly connected to the upper end of the base 1, and a positioning rod is fixedly connected to the upper end of the connecting plate. Figure 1 and Figure 2 As shown, multiple filter discs 2 are engaged on the connecting plate of the chassis 1, and the filter discs 2 are sleeved on the positioning rod. The top filter disc 2 is engaged with a top frame 11, which is also sleeved on the positioning rod. The upper end of the positioning rod extends from the upper end of the top frame 11, and the extended end of the positioning rod is threadedly connected to an internally threaded cylinder 12. By tightening the internally threaded cylinder 12, the internally threaded cylinder 12 applies downward pressure to the top frame 11, thereby pressing the multiple filter discs 2 and initially fixing the multiple filter discs 2.

[0025] like Figure 4As shown, the filter disc 2 comprises a chuck 21, filter paper 22 and a guide disc 23. The upper end of the chuck 21 is provided with a mounting groove, and the filter paper 22 is clamped in the mounting groove of the chuck 21. The guide disc 23 is clamped on the upper end of the chuck 21, and the lower end of the guide disc 23 extends into the mounting groove and is pressed above the filter paper 22. The lowermost chuck 21 is clamped on the upper end of the base disc 1, and the remaining chucks 21 are clamped on the upper end of the guide disc 23 of the adjacent filter disc 2. The upper end of the guide disc 23 is provided with a plurality of through holes, and the plurality of through holes are evenly distributed in a ring shape. In use, the chemical liquid is injected into the top frame 11, and the chemical liquid flows downward by its own weight and then passes through the filter disc 2 one by one. Specifically, the chemical liquid flows onto the chuck 21, passes through the plurality of through holes of the chuck 21, and is guided to the filter paper 22. The filtered chemical liquid after being filtered by the filter paper 22 enters the lower filter disc 2 through the chuck 21 and continues to be filtered. After the chemical liquid passes through the lowermost filter disc 2, the filtering is completed, and finally the chemical liquid is discharged from the lower end of the base disc 1 through the base disc 1.

[0026] However, if the plurality of filter discs 2 are only pressed downward by the inner threaded cylinder 12 at the center of the filter disc 2, and the edges of the filter disc 2 are not pressed, the chemical liquid will flow out from the gaps between the edges of the filter disc 2. In order to press the edges of the filter disc 2, the connecting disc is provided with a pressing mechanism 3. The pressing mechanism 3 is arranged in four, and the four pressing mechanisms 3 are evenly arranged on the outer side wall of the connecting disc in a ring array.

[0027] As shown in Figure 6 and Figure 7 , the pressing mechanism 3 comprises a connecting rod 31, a pressing block 32 and a cam 33. One end of the connecting rod 31 is rotatably connected to the outer side wall of the connecting disc, the pressing block 32 is slidably sleeved on the outer side wall of the connecting rod 31, and the cam 33 is rotatably connected above the connecting rod 31. The outer side wall of the cam 33 is fixedly connected with a pull rod 34, and the pull rod 34 is used to control the rotation of the cam 33. In use, the pressing block 32 is slid to above the connecting rod 31, the connecting rod 31 is rotated to fit on the outer side wall of the filter disc 2, and at this time the pressing block 32 is slid downward to be clamped on the upper end edge of the top frame 11. By rotating the cam 33 through the pull rod 34, the outer side wall of the cam 33 farthest from the center of rotation is fitted on the upper end of the pressing block 32, which can drive the pressing block 32 to press the top frame 11 and the filter disc 2 below, so as to press the top frame 11, the filter disc 2 and the base disc 1.

[0028] Compared with the existing method of rotating the nut to drive the pressing block 32 to press downward, the uneven pressure applied by the plurality of nuts will cause some areas of the disc to bear excessive pressure. However, the plurality of cams 33 are of the same specification, so when the plurality of cams 33 press the top frame 11 and the filter disc 2, the pressure applied to the top frame 11 and the filter disc 2 is uniform, which ensures the stability of the installation of the top frame 11 and the filter disc 2.

[0029] When the cam 33 presses the top frame 11 and the filter disc 2, it is necessary to ensure that all the cams 33 are in contact with the pressing block 32 at the outer side wall farthest from the rotation center of the cam 33. In order to ensure the rotation angle of the cam 33 and keep the outer side wall farthest from the rotation center of the cam 33 in contact with the pressing block 32, the inner side of the pull rod 34 is fixedly connected with a sliding rod 341, the outer side wall of the sliding rod 341 is slidingly sleeved with a sleeve 35, and the end of the connecting rod 31 away from the bottom disc 1 is fixedly connected with a protrusion 311 matched with the sleeve 35. After the cam 33 rotates and the outer side wall farthest from the rotation center of the cam 33 is in contact with the pressing block 32, the sliding rod 341 is located directly above the connecting rod 31, at which time the sliding sleeve 35 is sleeved on the protrusion 311, so as to fix the rotation angle of the cam 33 and keep the outer side wall farthest from the rotation center of the cam 33 in contact with the pressing block 32.

[0030] When the cam 33 rotates, the lower end of the sliding rod 341 is spaced apart from the upper end of the outer side wall of the connecting rod 31 by a distance less than the length of the sleeve 35, so as to prevent the sleeve 35 from being separated from the sliding rod 341 during the rotation of the cam 33. After the cam 33 rotates, the sleeve 35 will slide on the outer side wall of the sliding rod 341. In order to stabilize the sleeve 35, the upper end of the sleeve 35 is fixedly connected with a clamping block 351, and the inner side wall of the pull rod 34 is provided with a clamping hole. After the sleeve 35 slides upward on the outer side wall of the sliding rod 341, the clamping block 351 of the sleeve 35 is clamped in the clamping hole of the pull rod 34, so as to fix the sleeve 35 and prevent the sleeve 35 from sliding on the outer side wall of the sliding rod 341 after the cam 33 rotates.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A filtration device for chemical experiments, characterized by, Include: The bottom plate (1), the upper end of the bottom plate (1) is provided with a connecting disc, the upper end of the connecting disc is matched with a plurality of filter discs (2), the upper end of the uppermost filter disc (2) is matched with a top frame (11); The pressing mechanism (3) is uniformly arranged in a ring array with the bottom plate (1) as the center, the pressing mechanism (3) includes a connecting rod (31), a pressing block (32) and a cam (33), one end of the connecting rod (31) is rotatably connected to the outer side wall of the connecting disc, the pressing block (32) is slidably sleeved on the outer side wall of the connecting rod (31), and the cam (33) is rotatably connected above the connecting rod (31); Rotating the connecting rod (31) makes the pressing block (32) engaged at the upper end edge of the top frame (11), rotating the cam (33) drives the pressing block (32) to exert downward pressure on the lower top frame (11) and filter disc (2), so that the top frame (11) and filter disc (2) are tightly connected to the upper end of the bottom plate (1).

2. The filtering device for chemical experiments according to claim 1, characterized in that: The filter disc (2) includes a chuck (21), a filter paper (22) and a material guide disc (23), the upper end of the chuck (21) is provided with a mounting groove, the filter paper (22) is engaged in the mounting groove of the chuck (21), the material guide disc (23) is engaged at the upper end of the chuck (21), and the lower end of the material guide disc (23) is pressed on the upper end of the filter paper (22), the lowermost chuck (21) is engaged at the upper end of the bottom plate (1), and the remaining chucks (21) are engaged on the upper end of the adjacent material guide disc (23).

3. The filtering device for chemical experiments according to claim 2, characterized in that: The upper end of the material guide disc (23) is provided with a plurality of through holes which are evenly distributed in a ring shape.

4. The filtering device for chemical experiments according to claim 1, characterized in that: The outer side wall of the cam (33) is fixedly connected with a pull rod (34) for controlling the rotation of the cam (33).

5. The filtering device for chemical experiments according to claim 4, characterized in that: The inner side of the pull rod (34) is fixedly connected with a slide rod (341), the outer side wall of the slide rod (341) is slidably sleeved with a sleeve (35), and the end of the connecting rod (31) away from the bottom plate (1) is fixedly connected with a protruding block (311) matched with the sleeve (35).

6. The filtering device for chemical experiments according to claim 5, characterized in that: The upper end of the sleeve (35) is fixedly connected with a clamping block (351), and the inner wall of the pull rod (34) is provided with a clamping hole matched with the clamping block (351).

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