CN220231184U - An extraction device for food heavy metal detection - Google Patents

Abstract

The utility model provides a leaching device for detecting heavy metals in food, and relates to the field of food detection equipment. Comprises a bottom plate, a leaching component and a stirring component; the bottom plate is provided with an upright post, a liquid storage tank and a control box; the leaching assembly comprises a plurality of leaching barrels arranged on a bottom plate, a liquid storage tank is communicated with a shunt pipe, the liquid outlet end of the shunt pipe is respectively communicated with the plurality of leaching barrels, the leaching barrels are provided with a first valve, the upper sides of the leaching barrels are provided with overflow holes, the overflow holes are communicated with a sampling pipe, and the sampling pipe is provided with a second valve; the stirring assembly comprises a first driving unit and a sliding seat, wherein the first driving unit is used for driving the sliding seat to longitudinally slide on the upright post, the sliding seat is provided with a plurality of second driving units, the second driving units are located above the leaching barrels, the second driving units are connected with stirring rods, the stirring rods are rotationally provided with sealing plates, the sealing plates are provided with filter sleeves, the other ends of the filter sleeves are abutted to the bottoms of the leaching barrels, and the stirring assembly is convenient to use, improves leaching efficiency and is higher in universality.

Description

An extraction device for food heavy metal detection

Technical field

The utility model relates to the field of food testing equipment, specifically, to a leaching device for heavy metal detection in food.

Background technique

Metal pollution affects the environment, and also affects food safety. Heavy metals are easy to accumulate in organisms through biomagnification in the food chain, and their toxicity varies with the form. Heavy metals cannot be eliminated by biodegradation. For the health of the body and the safety of food , we need to test the heavy metal content of food to avoid eating food contaminated by heavy metals. Therefore, the "National Food Safety Standard" stipulates the limits of contaminants in food. In various research institutes, food processing enterprises and related units All involve the detection of heavy metals in food. Rapid and effective detection of heavy metals in food is an urgent need for production and processing enterprises and related units. The extraction method is a relatively economical detection method, and the existing extraction device is more efficient. Low. When food is immersed, food residues are easily mixed into the leaching solution, affecting the test results.

The patent document with the authorized publication number CN218212268U discloses a leaching device for heavy metal detection in food. Through the four cavities opened inside the leaching barrel and the stirring paddle located in the cavity, it can realize the simultaneous detection of multiple foods. The leaching work can accelerate the leaching efficiency and improve the efficiency of food heavy metal detection. However, in this technical solution, when the stirring paddle is stirring, the extract liquid in the cavity may spill out of the cavity and fall into the adjacent cavity, affecting the detection results of other foods. Moreover, this technical solution has certain disadvantages for foods with detection Certain requirements are required. For example, some foods that become mushy when exposed to water can easily block the filter holes at the bottom of the filter bucket, affecting the mixing quality and the filtration effect of the filter bucket. If the pore size of the filter bucket is expanded to solve this problem, it will affect the filtration of the filter bucket. Effect.

Utility model content

The purpose of this utility model is to provide a leaching device for detecting heavy metals in food, which can provide solutions to the shortcomings of the existing technology. It is easy to use, improves the leaching efficiency, and has greater versatility.

In order to solve the above technical problems, the technical solution adopted by this utility model is:

An extraction device for food heavy metal detection, which includes a bottom plate, an extraction component and a stirring component;

The above-mentioned bottom plate is provided with a column, a liquid storage tank and a control box;

The above-mentioned leaching assembly includes a plurality of leaching buckets arranged on the above-mentioned bottom plate. The above-mentioned liquid storage tank is connected with a shunt pipe. The liquid outlet end of the above-mentioned shunt pipe is connected with a plurality of the above-mentioned leaching buckets. The above-mentioned shunt pipe is connected with the above-mentioned leaching bucket. A first valve is provided at the connection point, an overflow hole is provided on the upper side of the above-mentioned leaching barrel, the above-mentioned overflow hole is connected with a sample outlet pipe, and the above-mentioned sample outlet pipe is provided with a second valve;

The above-mentioned stirring assembly includes a first driving unit and a sliding seat. The first driving unit is used to drive the sliding seat to slide longitudinally on the side of the column. The sliding seat is provided with a plurality of second driving units, and a plurality of the second driving units are provided. They are respectively located above a plurality of the above-mentioned leaching buckets. The output end of the above-mentioned second driving unit is connected to a stirring rod. The above-mentioned stirring rod is rotated and provided with a closing plate. The above-mentioned closing plate is in contact with the top of the above-mentioned leaching bucket. The above-mentioned closing plate faces the above-mentioned leaching bucket. A filter sleeve is fixedly installed on one side of the interior of the leaching barrel, and the other end of the filter sleeve is in contact with the bottom of the leaching barrel.

Further, in one embodiment of the present invention, the above-mentioned stirring rod includes a rod body and a stirring paddle arranged on the bottom side of the above-mentioned rod body, and the above-mentioned stirring paddle is located inside the above-mentioned filter sleeve.

Furthermore, in one embodiment of the present invention, an annular seal is provided on one side of the filter sleeve facing the bottom plate, an annular groove is provided at the bottom of the extraction barrel, and the annular seal is located in the annular groove.

Furthermore, in one embodiment of the present invention, the side wall of the leaching bucket is provided with a cleaning hole connected with the annular groove, and the cleaning hole is connected with a drainage pipe.

Further, in one embodiment of the present invention, the above-mentioned stirring rod is detachably connected to the output end of the above-mentioned second driving unit.

Further, in one embodiment of the present invention, the above-mentioned first valve and the above-mentioned second valve are solenoid valves, and the above-mentioned first valve, the above-mentioned second valve, the above-mentioned first driving unit and the above-mentioned second driving unit are all connected with The above control box is electrically connected.

Furthermore, in one embodiment of the present invention, the above-mentioned bottom plate is provided with a plurality of placement slots for accommodating the above-mentioned leaching barrels.

The utility model has at least the following advantages or beneficial effects:

1) Through the stirring rod, closing plate, filter sleeve and extraction barrel, combined with the overflow liquid discharge method, the interference of food residues on the extraction process is reduced, and the extraction efficiency and compatibility with food samples are improved. The utility model is easy to use, improves the extraction efficiency, and has greater versatility.

2) The detachable connection between the above-mentioned stirring rod and the above-mentioned second drive unit reduces the difficulty of cleaning the filter sleeve and the extraction bucket and improves convenience.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present utility model more clearly, the drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the utility model. Therefore, it should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a front view of an embodiment of the present utility model;

Figure 2 is a top view of an embodiment of the present utility model;

Figure 3 is a schematic structural diagram of a leaching bucket according to an embodiment of the present utility model.

Icon: 1. Bottom plate; 2. Column; 3. Liquid storage tank; 4. Control box; 5. Dipping bucket; 6. Cabling tube; 7. Split tube; 8. Sample outlet tube; 9. First drive unit ; 10. Sliding seat; 11. Second drive unit; 12. Stirring rod; 13. Closing plate; 14. Filter sleeve; 15. Ring seal; 16. Cleaning hole; 17. Drainage pipe; 18. Placement slot.

Detailed ways

Example

Please refer to Figures 1-3. This embodiment provides an extraction device for food heavy metal detection, which includes a base plate 1, an extraction component and a stirring component;

The above-mentioned bottom plate 1 is provided with a column 2, a liquid storage tank 3 and a control box 4;

The above-mentioned leaching assembly includes a plurality of leaching buckets 5 arranged on the above-mentioned bottom plate 1. The above-mentioned liquid storage tank 3 is connected with a shunt pipe 7. The liquid outlet end of the above-mentioned shunt pipe 7 is respectively connected with a plurality of the above-mentioned leaching buckets 5. The above-mentioned shunt pipes A first valve is provided at the connection between the pipe 7 and the above-mentioned leaching bucket 5. An overflow hole is provided on the upper side of the above-mentioned leaching bucket 5. The above-mentioned overflow hole is connected with a sample outlet pipe 8, and the above-mentioned sample outlet pipe 8 is provided with a second valve. valve;

The above-mentioned stirring assembly includes a first driving unit 9 and a sliding base 10. The first driving unit 9 is used to drive the sliding base 10 to slide longitudinally on the side of the column 2. The sliding base 10 is provided with a plurality of second driving units 11. The plurality of second driving units 11 are respectively located above the plurality of leaching barrels 5 . The output end of the second driving unit 11 is connected to a stirring rod 12 , and the stirring rod 12 is provided with a closing plate 13 for rotation. The closing plate 13 In contact with the top of the leaching barrel 5 , a filter sleeve 14 is fixed on one side of the closing plate 13 toward the inside of the leaching barrel 5 . The other end of the filter sleeve 14 is in contact with the bottom of the leaching barrel 5 .

In one embodiment of the present invention, before use, both the first valve and the second valve are in a closed state, and the sliding seat 10 is located on the upper side of the column 2, that is, the stirring rod 12 is located outside the extraction barrel 5. When , place the food sample at the center of the bottom of the extraction barrel 5 (inside the filter sleeve 14 ), and then the first drive unit 9 drives the sliding seat 10 to slide downward along the column 2 , and the filter sleeve on the closing plate 13 The bottom end of the barrel 14 is in contact with the bottom of the above-mentioned leaching bucket 5. At this time, the closing plate 13, the filter sleeve 14 and the bottom of the leaching bucket 5 jointly form a stirring space, and the food sample is limited to the above-mentioned stirring space (the stirring space here Belonging to the internal space of the leaching barrel 5), open the first valve, fill the leaching liquid into the leaching barrel 5 and ensure that the leaching liquid is higher than the above-mentioned overflow hole, and then start the second driving unit 11 to drive the stirring rod 12. Stir, wait for a period of time after stirring, open the second valve, and the sample liquid flows out from the sample outlet tube 8 to the external collection container, and then attach a corresponding label, and perform batch testing according to the detection indicators of the target food. In the above process, the filter sleeve 14 and the overflow liquid discharge method reduce the interference of food residues on the extraction process, improve the extraction efficiency, and have better compatibility with food. The utility model is easy to use, improves the extraction efficiency, and has greater versatility.

It should be noted that the above-mentioned first valve and the second valve can be manual valves or electronically controlled valves, as long as they can realize the cut-off function; the above-mentioned first driving unit 9 can include any of the existing technologies that can perform Linear reciprocating motion mechanisms, such as synchronous belt type linear modules, ball screw type linear modules, linear motor type linear modules and telescopic mechanisms, etc. are not limited to these and can drive the slider seat to reciprocate in a straight line on the column 2 The above-mentioned second driving unit 11 can include a mechanism in the prior art whose output form is rotational motion, such as a pulley and a drive motor, which can drive the stirring rod 12 to rotate; the stirring rod 12 is connected to the above-mentioned closing plate 13 through a bearing. Rotation connection, that is, the inner ring and outer ring of the bearing are connected to the stirring rod 12 and the closing plate 13 respectively. Preferably, the above-mentioned sliding seat 10 is provided with a wiring tube 6 to avoid the occurrence of power accidents. The proportions of the various components shown in the drawings have been exaggerated in the drawings for the sake of clarity and may of course be adjusted as needed and required.

In one embodiment of the present invention, the stirring rod 12 includes a rod body and a stirring paddle disposed on the bottom side of the rod body. The stirring paddle is located inside the filter sleeve 14 and has higher stirring efficiency.

In one embodiment of the present invention, the filter sleeve 14 is provided with an annular seal 15 on one side facing the bottom plate 1 , and an annular groove is provided at the bottom of the extraction barrel 5 , and the annular seal 15 is located in the annular groove. .

In the above embodiment, the annular seal 15 is a double-layer rubber sealing strip. The structure of the above-mentioned double-layer rubber sealing strip is equivalent to the structure of cutting and unfolding the double-layer rubber sealing ring in the prior art. The double-layer rubber sealing strip is glued together. It is fixed to the bottom of the above-mentioned filter sleeve 14, and the two raised parts of the double-layer rubber sealing strip are in contact with the bottom of the above-mentioned annular groove to prevent the food sample from directly escaping from the above-mentioned stirring space.

In one embodiment of the present invention, the side wall of the leaching bucket 5 is provided with a cleaning hole 16 connected with the annular groove, and the cleaning hole 16 is connected with a drainage pipe 17 .

In the above embodiment, the utility model needs to clean the filter sleeve 14 and the inside of the extraction barrel 5 after completing one extraction. The design of the cleaning hole 16 and the drainage hole can clean the extraction barrel 5 without detaching it. The inside of the extraction barrel 5 is cleaned to improve the detection efficiency and prevent the residues of this extraction operation from affecting the accuracy of the next extraction operation.

In one embodiment of the present invention, the stirring rod 12 is detachably connected to the output end of the second driving unit 11 .

In the above embodiment, the stirring rod 12 and the second driving unit 11 are detachably connected through a coupling. The purpose of this design is to further reduce the difficulty of cleaning the filter sleeve 14 and the extraction bucket 5 and improve convenience. sex.

In one embodiment of the present invention, the above-mentioned first valve and the above-mentioned second valve are solenoid valves, and the above-mentioned first valve, the above-mentioned second valve, the above-mentioned first driving unit 9 and the above-mentioned second driving unit 11 are all connected with the above-mentioned The control box 4 is electrically connected.

In the above embodiment, the above-mentioned first valve and the above-mentioned second valve are both solenoid valves. Optionally, in order to better realize automatic detection, a time relay can be provided in the control box 4 or in the liquid storage tank 3 or the extraction tank. The barrel 5 is equipped with a liquid level sensor, which reduces the dependence of the utility model on labor.

In one embodiment of the present invention, the above-mentioned bottom plate 1 is provided with a plurality of placement slots 18 for accommodating the above-mentioned leaching bucket 5 .

In the above embodiment, the placement groove 18 realizes the detachable connection between the extraction barrel 5 and the bottom plate 1, and plays a limiting effect, which can prevent the relative deviation of the extraction barrel 5 and its corresponding stirring rod 12.

In summary, embodiments of the present utility model provide an extraction device for detecting heavy metals in food, which has at least the following technical effects:

1) Before use, both the first valve and the second valve are in a closed state, and the sliding seat 10 is located on the upper side of the column 2, that is, the stirring rod 12 is located outside the leaching barrel 5. During use, place the food sample in the immersion chamber. The center position of the bottom of the bucket 5 (the inside of the filter sleeve 14), then the first drive unit 9 drives the sliding seat 10 to slide downward along the column 2, and the bottom end of the filter sleeve 14 on the closing plate 13 is in contact with the above-mentioned dip The bottom of the bucket 5 is in contact. At this time, the closing plate 13, the filter sleeve 14 and the bottom of the extraction bucket 5 jointly form a stirring space, and the food sample is limited to the above-mentioned stirring space (the stirring space here belongs to the internal space of the extraction bucket 5 part), open the first valve, fill the leach liquid into the leach barrel 5 and ensure that the leach liquid is higher than the above-mentioned overflow hole, then start the second drive unit 11 to drive the stirring rod 12 to stir, and let it stand for a while after the stirring is completed. time, the second valve is opened, and the sample liquid flows out from the sample outlet pipe 8 to the external collection container, and then a corresponding label is attached, and batch testing is performed according to the detection indicators of the target food. In the above process, the filter sleeve 14 and the overflow liquid discharge method reduce the interference of food residues on the extraction process, improve the extraction efficiency, and have better compatibility with food. The utility model is easy to use, improves the extraction efficiency, and has greater versatility.

2) The above-mentioned stirring rod 12 and the above-mentioned second driving unit 11 are detachably connected, which reduces the difficulty of cleaning the filter sleeve 14 and the extraction bucket 5 and improves convenience.

The above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (7)

1. An extraction device for detecting heavy metals in food, which is characterized in that it includes a bottom plate, an extraction component and a stirring component; The bottom plate is provided with a column, a liquid storage tank and a control box; The leaching assembly includes a plurality of leaching buckets arranged on the bottom plate. The liquid storage tank is connected with a shunt pipe. The liquid outlet end of the shunt pipe is connected to a plurality of the leaching buckets. The shunt pipe is connected to a plurality of leaching buckets. A first valve is provided at the connection between the pipe and the leaching barrel. An overflow hole is provided on the upper side of the leaching barrel. The overflow hole is connected to a sample outlet pipe. The sample outlet pipe is provided with a second valve. ; The stirring assembly includes a first driving unit and a sliding base. The first driving unit is used to drive the sliding base to slide longitudinally on the side of the column. The sliding base is provided with a plurality of second driving units, a plurality of The second driving units are respectively located above a plurality of the leaching barrels. The output end of the second driving unit is connected to a stirring rod. The stirring rod is rotated with a closing plate, and the closing plate is connected with the leaching barrel. The top of the bucket is in contact with each other, and a filter sleeve is fixedly provided on one side of the closing plate toward the inside of the leaching bucket, and the other end of the filter sleeve is in contact with the bottom of the leaching bucket. 2. The extraction device for detecting heavy metals in food according to claim 1, characterized in that the stirring rod includes a rod body and a stirring paddle arranged on the bottom side of the rod body, and the stirring paddle is located inside the filter sleeve. . 3. The extraction device for food heavy metal detection according to claim 1, characterized in that the filter sleeve is provided with an annular seal on one side facing the bottom plate, and the bottom of the extraction barrel is provided with an annular groove. The annular seal is located within the annular groove. 4. The extraction device for detecting heavy metals in food according to claim 3, characterized in that the side wall of the extraction barrel is provided with a cleaning hole connected to the annular groove, and the cleaning hole is connected to a drainage pipe. 5. The extraction device for detecting heavy metals in food according to claim 1, wherein the stirring rod is detachably connected to the output end of the second drive unit. 6. The extraction device for detecting heavy metals in food according to claim 1, wherein the first valve and the second valve are solenoid valves, and the first valve, the second valve, and the second valve are electromagnetic valves. Both the first driving unit and the second driving unit are electrically connected to the control box. 7. The extraction device for detecting heavy metals in food according to claim 1, wherein the bottom plate is provided with a plurality of placement slots for accommodating the extraction buckets.