Sample impurity separation device for food detection

Abstract

The utility model relates to the technical field of separation equipment, and discloses a sample impurity separation device for food detection, which comprises a suction flask, a Buchner funnel is inserted into the top of the suction flask, a filter paper sheet is laid in the Buchner funnel, and a stirring mechanism is arranged in the Buchner funnel. The stirring mechanism and the extruding mechanism are arranged in the Buchner funnel, in the solid-liquid separation process of a sample, the stirring mechanism can stir liquid to be detected, exchange between impurities and filter paper is promoted, meanwhile, the impurities can be evenly distributed in the stirring process, accumulation of the impurities is avoided, and the filtering speed is reduced; therefore, the sample can quickly penetrate through the filter paper sheet and the funnel meshes, so that the filtering speed is accelerated, and the impurity separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of separation equipment, in particular to a sample impurity separation device for food detection. Background Art

[0002] During food testing, samples need to be separated from impurities. Common equipment for separation includes filtration, centrifugation and filtration. Among them, the Büchner funnel is a more commonly used filtration device. The existing Büchner funnel needs to use a vacuum pump to draw the liquid into the filtration bottle during filtration. If the sample liquid volume is too much, it will take a long time to filter, resulting in low detection efficiency.

[0003] Therefore, we propose a sample impurity separation device for food testing in order to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art in the above background technology, the purpose of the present utility model is to provide a sample impurity separation device for food testing to solve the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A sample impurity separation device for food testing, comprising a suction filter bottle, a Buchner funnel is inserted on the top of the suction filter bottle, a filter paper is laid in the Buchner funnel, and a stirring mechanism is arranged in the Buchner funnel;

[0009] The stirring mechanism includes a rotating rod rotatably installed in the Buchner funnel, a plurality of stirring blades are evenly distributed on the rotating rod, a ring groove is opened on the top of the Buchner funnel, a plurality of brackets are arranged on the side wall of the rotating rod, and a slider slidably connected to the ring groove is arranged at one end of the bracket away from the rotating rod.

[0010] Furthermore, a gap is left between the bottom end of the rotating rod and the filter paper.

[0011] Furthermore, the stirring blade and the bracket both extend radially along the rotating rod, and the bracket is located above the stirring blade.

[0012] Preferably, a ball is rotatably mounted on the bottom of the slider, and the ball is rollingly connected to the bottom wall of the annular groove.

[0013] Preferably, a knob is provided on the top of the rotating rod.

[0014] Furthermore, it also includes an extrusion mechanism, which includes an extrusion plate vertically slidably installed in the Buchner funnel and a pressure rod slidably penetrated through the bracket and with the bottom end fixed to the top of the extrusion plate, a pressing block is provided at the top of the pressure rod, a return spring is provided between the pressing block and the bracket, and the return spring is sleeved on the pressure rod.

[0015] Furthermore, a through slot corresponding to the stirring blade is formed on the extrusion plate, and the stirring blade can pass through the through slot.

[0016] Furthermore, the extruded plate is made of transparent glass.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] By setting a stirring mechanism and a squeezing mechanism in the Büchner funnel, during the solid-liquid separation process of the sample, the stirring mechanism can stir the liquid to be tested to promote the exchange between impurities and the filter paper. At the same time, the impurities can be evenly distributed during the stirring process to avoid their accumulation and slow down the filtration speed. The setting of the squeezing mechanism allows the sample to pass through the filter paper and the funnel mesh faster, thereby speeding up the filtration speed and improving the impurity separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the external structure of the sample impurity separation device for food testing of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the stirring mechanism of the sample impurity separation device for food testing of the utility model;

[0022] Figure 3 This is an enlarged view of point A of the sample impurity separation device for food testing of the utility model;

[0023] Figure 4 The utility model is a schematic diagram of the structure of the extrusion mechanism of the sample impurity separation device for food testing.

[0024] In the figure: suction filtration bottle 1, Buchner funnel 2, filter paper 3, stirring mechanism 4, rotating rod 41, stirring blade 42, annular groove 43, bracket 44, slider 45, ball 46, knob 47, squeezing mechanism 5, squeezing plate 51, pressure rod 52, pressing block 53, return spring 54, through groove 55. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 As shown, the utility model provides a sample impurity separation device for food testing, including a suction filtration bottle 1, a Buchner funnel 2 and a vacuum pump. The Buchner funnel 2 is inserted into the top of the suction filtration bottle 1, and a sealing rubber sleeve is provided at the interface to improve the sealing performance. The suction port of the suction filtration bottle 1 is connected to the vacuum pump through an air pipe, a filter paper sheet 3 is laid on the funnel plate in the Buchner funnel 2, and a stirring mechanism 4 and an extrusion mechanism 5 are provided in the Buchner funnel 2.

[0027] When the vacuum pump is evacuated, the liquid is drawn from the Buchner funnel 2 into the suction filtration bottle, while the fixed impurities remain on the funnel plate and the filter paper 3, thus achieving solid-liquid separation. The stirring mechanism 4 can stir the liquid to be tested, promote the exchange between the impurities and the filter paper 3, and evenly distribute the impurities during the stirring process to avoid their accumulation and slow down the filtration speed. The setting of the squeezing mechanism 5 allows the sample to pass through the mesh of the filter paper 3 and the funnel plate faster, thereby speeding up the filtration speed and improving the impurity separation efficiency.

[0028] The stirring mechanism 4 includes a rotating rod 41 rotatably installed in the Buchner funnel 2, and the side wall of the rotating rod 41 is evenly distributed with multiple stirring blades 42 and multiple brackets 44 along its radial direction. The top of the Buchner funnel 2 is provided with an annular groove 43, and the side wall of the rotating rod 41 is provided with multiple brackets 44. The stirring blades 42 and the brackets 44 both extend radially along the rotating rod 41. The brackets 44 are located above the stirring blades 42. A slider 45 slidably connected to the annular groove 43 is provided at one end of the bracket 44 away from the rotating rod 41. A knob 47 is provided on the top of the rotating rod 41.

[0029] During filtration separation, the rotating rod 41 is placed in the Buchner funnel 2, and the slider 45 on the edge of the bracket 44 is inserted into the annular groove 43. At this time, the rotating rod 41 and the stirring blade 42 are driven to rotate by turning the knob 47, so as to stir the liquid to be tested and accelerate the separation efficiency.

[0030] The squeezing mechanism 5 includes a squeezing plate 51 vertically slidably installed in the Buchner funnel 2 and a pressing rod 52 vertically fixed on the squeezing plate 51. The squeezing plate 51 is provided with a through groove 55 corresponding to the stirring blade 42, and the stirring blade 42 can pass through the through groove 55. The bracket 44 is provided with a through hole corresponding to the pressing rod 52. A pressing block 53 is coaxially fixed to the top of the pressing rod 52 through the through hole. A reset spring 54 is arranged between the pressing block 53 and the bracket 44, and the reset spring 54 is sleeved on the pressing rod 52.

[0031] After stirring, the pressing block 53 can be pressed by both hands to make the pressing rod 52 drive the squeezing plate 51 to move downward to squeeze the sample, so that the sample passes through the mesh of the filter paper 3 and the funnel plate more quickly, thereby accelerating the filtration speed.

[0032] As a preferred technical solution of the utility model: a gap is left between the bottom end of the rotating rod 41 and the filter paper 3, so that the bottom of the rotating rod 41 contacts the filter paper 3, preventing the filter paper 3 from being damaged when the rotating rod 41 rotates, and a ball 46 is rotatably installed on the bottom of the slider 45, and the ball 46 is rollingly connected to the bottom wall of the annular groove 43, so that the staff can save more effort when rotating the rotating stem 41.

[0033] As a preferred technical solution of the utility model: the squeezing plate 51 is made of transparent glass, so that the staff can observe the situation in the Buchner funnel 2 during squeezing.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be noted that, in the present invention, unless otherwise clearly specified and limited, the terms such as “set”, “install”, “connected”, “connected”, “fixed”, etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can also be indirectly connected through an intermediate medium.

[0035] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0036] For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances; for technicians in this field, they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A sample impurity separation device for food testing, comprising a suction filtration bottle (1), characterized in that: A Buchner funnel (2) is inserted into the top of the suction filtration bottle (1), a filter paper sheet (3) is laid in the Buchner funnel (2), and a stirring mechanism (4) is arranged in the Buchner funnel (2); The stirring mechanism (4) comprises a rotating rod (41) rotatably mounted in the Buchner funnel (2), a plurality of stirring blades (42) being evenly distributed on the rotating rod (41), a ring groove (43) being provided on the top of the Buchner funnel (2), a plurality of brackets (44) being provided on the side wall of the rotating rod (41), and a sliding block (45) slidably connected to the ring groove (43) being provided at one end of the bracket (44) away from the rotating rod (41).

2. A sample impurity separation device for food testing according to claim 1, characterized in that: A gap is left between the bottom end of the rotating rod (41) and the filter paper (3).

3. A sample impurity separation device for food testing according to claim 2, characterized in that: The stirring blade (42) and the bracket (44) both extend radially along the rotating rod (41), and the bracket (44) is located above the stirring blade (42).

4. A sample impurity separation device for food testing according to claim 3, characterized in that: A ball (46) is rotatably mounted on the bottom of the slider (45), and the ball (46) is rollingly connected to the bottom wall of the annular groove (43).

5. The device for separating impurities from food samples according to claim 4, characterized in that: A knob (47) is provided on the top of the rotating rod (41).

6. The device for separating impurities from food samples according to claim 1, characterized in that: The invention also comprises an extrusion mechanism (5), wherein the extrusion mechanism (5) comprises an extrusion plate (51) vertically slidably mounted in the Buchner funnel (2) and a pressure rod (52) slidably penetrated through the bracket (44) and having its bottom end fixed to the top of the extrusion plate (51); a pressing block (53) is arranged at the top of the pressure rod (52); a return spring (54) is arranged between the pressing block (53) and the bracket (44); and the return spring (54) is sleeved on the pressure rod (52).

7. The device for separating impurities from food samples according to claim 6, characterized in that: The squeezing plate (51) is provided with a through slot (55) corresponding to the stirring blade (42), and the stirring blade (42) can pass through the through slot (55).

8. The device for separating impurities from food samples according to claim 7, characterized in that: The extrusion plate (51) is made of transparent glass.

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