CN212383279U - Filter equipment is used in laboratory - Google Patents

Abstract

The utility model provides a filter equipment is used in laboratory, in the use, fold filter paper earlier, form with the toper that toper feed cylinder shape is the same puts into toper draft tube with toper filter paper among, moist filter paper makes the inner wall laminating of filter paper and toper draft tube, then slowly topples over the solution and filters, compare the traditional distributing type funnel in-process of using, circular filter paper directly keeps flat in circular bottom surface, can effectively avoid solution and filter residue to get into the gap of buchner funnel and circular filter paper, not only effectively improve filtrating purity, also be convenient for fully collect the filter residue, improve experimental efficiency.

Description

Filter equipment is used in laboratory

Technical Field

The utility model relates to an experimental apparatus, specific theory has related to a filter equipment is used in laboratory.

Background

The filtration is an operation that liquid (or gas) in suspension (or solid particle-containing heating gas) permeates a medium under the action of a driving force or other external forces, and solid particles and other substances are intercepted by the filter medium, so that the solid and other substances are separated from the liquid (or gas). The conventional filtration adopts a glass conical funnel which has only one liquid leakage hole, so that the filtration efficiency is low; most of suction filtration adopts a distributed funnel, the distributed funnel comprises a cylindrical expansion part at the upper end and a tubular connecting part at the lower end, the cylindrical expansion part and the tubular connecting part are in smooth transition, the cylindrical expansion part is provided with a circular bottom surface, the circular bottom surface is provided with a plurality of holes, filter paper is placed on the circular bottom surface in the using process, however, in the suction filtration process, filtrate can enter a gap between the filter paper and the distributed funnel and directly enter a filter bottle without passing through the filter paper, and when the filtrate needs to be used, the purity of the filtrate can not be ensured, and subsequent tests can be influenced; in addition, partial filter residue also can stop in the clearance of filter paper and distributing type funnel, can't fully collect, consequently, when required finished product is the filter residue, also can have great loss, especially to some less chemical experiments of solid product, can't collect the solid product fully, just need carry out same experiment repeatedly, greatly reduced experimental efficiency.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The utility model aims at providing a filter equipment is used in laboratory to the not enough to prior art.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a filter device for a laboratory comprises a funnel and a filter flask, wherein the funnel comprises a conical feeding cylinder and a guide cylinder; the top of the conical feeding cylinder is open, the inner diameter of the conical feeding cylinder is gradually increased from bottom to top, a plurality of liquid leakage holes are uniformly formed in the lower portion of the conical feeding cylinder, and one liquid leakage hole is located at the tip of the lower portion of the conical feeding cylinder; the lower part of the conical feeding cylinder provided with the liquid leakage hole extends into the guide cylinder, and the upper end of the guide cylinder is hermetically connected with the conical feeding cylinder.

Based on the above, the highest position of the distribution of the liquid leakage holes is 1/3-1/2 of the height of the conical feed cylinder.

Based on the above, the draft tube is a straight type or reducing structure with two open ends, and the end with the larger inner diameter of the reducing structure is connected with the tapered feeding tube, and the end with the smaller inner diameter of the reducing structure is used for being connected with the bottle opening of the filter bottle.

Based on the above, the conical feeding cylinder and the guide cylinder are ceramic cylinders or glass cylinders.

Based on the above, the lower end outflow opening of the draft tube is obliquely arranged.

Based on the aforesaid, the top in weeping hole sets up the spacing piece of annular parallel with draft tube cross-section, and the downside setting of the spacing piece of annular is greater than the external diameter of draft tube with the perpendicular annular clamping ring of the spacing piece of annular, the external diameter of annular clamping ring with the internal diameter of draft tube suits, the annular clamping ring stretches into the draft tube overlap joint.

Based on the above, the filtering device for the laboratory further comprises a vacuum pump, wherein an air exhaust interface communicated with the interior of the filter flask is arranged at the upper part of the side wall of the filter flask, and the air exhaust interface is connected with an air exhaust pipe of the vacuum pump; the lower pot head of draft tube is equipped with the rubber buffer, the external diameter of rubber buffer with the inlet of filter flask suits.

Based on the above, the lower end flow outlet of the guide shell is flush with the air exhaust interface and is just opposite to the air exhaust interface.

Based on the above, evenly set up a plurality of hemispheric bulges on the lateral wall of the interface of bleeding.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model provides a filter equipment is used in laboratory, in the use, fold filter paper earlier, form with the toper that toper feed cylinder shape is the same puts into toper draft tube with toper filter paper among, moist filter paper makes the inner wall laminating of filter paper and toper draft tube, then slowly empties the solution and filters, compares the traditional distributing type funnel in-process of using, and circular filter paper directly keeps flat in circular bottom surface, can effectively avoid solution and filter residue to get into the gap of buchner funnel and circular filter paper, not only effectively improves filtrating purity, is convenient for also fully collect the filter residue, improves experimental efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of a funnel in one embodiment.

Fig. 2 is a schematic structural diagram of a funnel in another embodiment.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic structural diagram of a funnel in another embodiment.

In the figure: 1. a conical feed cylinder; 2. a weep hole; 3. a draft tube; 4. a rubber plug; 5. an air extraction interface; 6. a hemispherical protrusion; 7. a filter flask; 8. an annular limiting sheet; 9. and an annular connecting ring.

Detailed Description

The technical solution of the present invention will be described in further detail through the following embodiments.

As shown in fig. 1, the filter device for the laboratory comprises a funnel and a filter flask 7, wherein the funnel comprises a conical feed cylinder 1 and a guide cylinder 3; the top of the conical feeding cylinder 1 is open, the inner diameter of the conical feeding cylinder is gradually increased from bottom to top, a plurality of liquid leakage holes 2 are uniformly formed in the lower portion of the conical feeding cylinder 1, and one liquid leakage hole 2 is located at the tip of the lower portion of the conical feeding cylinder 1; the lower part of the conical feeding cylinder 1 provided with the liquid leakage hole 2 extends into the guide cylinder 3, and the upper end of the guide cylinder 3 is hermetically connected with the conical feeding cylinder 1.

The device can be used for conventional filtration with gravity as a driving force and can also be used for suction filtration with pressure as a driving force, in the using process, filter paper is firstly folded to form a cone with the same shape as the cone-shaped feeding cylinder, the cone-shaped filter paper is placed in the cone-shaped guide cylinder, the filter paper is wetted to enable the filter paper to be attached to the inner wall of the cone-shaped guide cylinder, then the solution is slowly poured for filtration, compared with the traditional distributed funnel process, the circular filter paper is directly and flatly placed on the circular bottom surface, the solution and filter residues can be effectively prevented from entering gaps between a Buchner funnel and the circular filter paper, the purity of the filtrate is effectively improved, the filter residues can be conveniently and fully collected, and; compared with the conventional conical funnel, the filter efficiency can also be effectively improved.

Preferably, the highest position of the distribution of the weeping holes 2 is 1/3-1/2 of the height of the conical feeding cylinder 1, the position of the weeping holes is prevented from being close to the top of the conical feeding cylinder, the laboratory small-capacity suction filtration is convenient, if the position of the weeping holes is close to the top of the conical feeding cylinder, in the suction filtration process, in order to form a negative pressure environment, the liquid level in the funnel is correspondingly higher, and the experiment operation risk is higher.

Further, the guide cylinder 3 is a straight type (see fig. 2) or a reducing structure (see fig. 1) with two open ends, the end with the larger inner diameter of the reducing structure is connected with the conical feeding cylinder 1, and the end with the smaller inner diameter of the reducing structure is used for being connected with the bottle mouth of the filter bottle.

Further, the conical feeding cylinder 1 and the guide cylinder 3 are ceramic cylinders or glass cylinders, and the connection mode of the conical feeding cylinder 1 and the guide cylinder 3 can correspondingly adopt ceramic welding, glass cement, ceramic cement and the like in the prior art.

Further, see fig. 4, the top in weeping hole sets up the spacing piece of annular 8 parallel with the draft tube cross-section, and the downside setting of the spacing piece of annular 8 is greater than the external diameter of draft tube 3 with the spacing piece 8 vertically annular connecting ring 9 of annular, the external diameter of the spacing piece of annular 8, the external diameter of annular connecting ring 9 with the internal diameter of draft tube 3 suits, annular connecting ring 9 stretches into 3 laps of draft tube to dismantle the washing after using, if adopt the glass material, the contact surface of annular connecting ring and draft tube can adopt the frosting, combines vaseline sealed during the use, or ceramic material or other materials, can set up rubber seal between annular connecting ring and draft tube and seal.

Furthermore, the lower end outlet of the guide cylinder 3 is obliquely arranged, so that the sectional area of the outlet is increased, and the filtering efficiency is improved.

Further, as shown in fig. 3, the filtering apparatus for the laboratory further comprises a vacuum pump, an air exhaust interface 5 communicated with the inside of the filter flask 7 is arranged at the upper part of the side wall of the filter flask 7, and the air exhaust interface 5 is connected with an air exhaust pipe of the vacuum pump; the lower pot head of draft tube 3 is equipped with rubber buffer 4, the external diameter of rubber buffer 4 with the inlet of filter flask 7 suits for filter flask and draft tube sealing connection.

Further in order to improve the suction filtration efficiency, the lower end outlet of the guide cylinder 3 is flush with the air exhaust interface 5 and is just opposite to the air exhaust interface 5, so that liquid at the lower end outlet of the guide cylinder flows down rapidly, and the filtration efficiency is effectively improved.

Further in order to improve the connection tightness, a plurality of hemispherical bulges 6 are uniformly arranged on the side wall of the air exhaust interface 5, so that the air exhaust interface can be closely connected with an air exhaust hose of the vacuum pump, and the connection tightness is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (9)

1. The utility model provides a filter equipment is used in laboratory, includes funnel and filter flask, its characterized in that: the hopper comprises a conical feeding cylinder and a guide cylinder; the top of the conical feeding cylinder is open, the inner diameter of the conical feeding cylinder is gradually increased from bottom to top, a plurality of liquid leakage holes are uniformly formed in the lower portion of the conical feeding cylinder, and one liquid leakage hole is located at the tip of the lower portion of the conical feeding cylinder; the lower part of the conical feeding cylinder provided with the liquid leakage hole extends into the guide cylinder, and the upper end of the guide cylinder is hermetically connected with the conical feeding cylinder.

2. The laboratory filter apparatus of claim 1, wherein: the highest position of the distribution of the liquid leakage holes is 1/3-1/2 of the height of the conical feed cylinder.

3. The laboratory filter apparatus of claim 1, wherein: the guide cylinder is a straight or reducing structure with two open ends, the end with the larger inner diameter of the reducing structure is connected with the conical feeding cylinder, and the end with the smaller inner diameter of the reducing structure is used for being connected with the bottle opening of the filter bottle.

4. The laboratory filter of any of claims 1 to 3, wherein: the top in weeping hole sets up the spacing piece of annular parallel with draft tube cross-section, and the downside setting of the spacing piece of annular is with the spacing piece vertically annular clamping ring of annular, and the external diameter of the spacing piece of annular is greater than the external diameter of draft tube, the external diameter of annular clamping ring with the internal diameter of draft tube suits, the annular clamping ring stretches into the draft tube overlap joint.

5. The laboratory filter apparatus of claim 4, wherein: and the lower end outlet of the guide shell is obliquely arranged.

6. The laboratory filter apparatus of claim 5, wherein: the vacuum pump is also included, the upper part of the side wall of the filter flask is provided with an air extraction interface communicated with the interior of the filter flask, and the air extraction interface is connected with an air extraction pipe of the vacuum pump; the lower pot head of draft tube is equipped with the rubber buffer, the external diameter of rubber buffer with the inlet of filter flask suits.

7. The laboratory filter apparatus of claim 6, wherein: the lower end outflow port of the guide shell is flush with the air exhaust port and is opposite to the air exhaust port.

8. The laboratory filter apparatus of claim 7, wherein: the side wall of the air exhaust interface is uniformly provided with a plurality of hemispherical bulges.

9. The laboratory filter of any of claims 1 to 3, wherein: the conical feeding cylinder and the guide cylinder are ceramic cylinders or glass cylinders.

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