CN112763252B - Sampling method for food detection - Google Patents

Abstract

The present invention discloses a sampling method for food detection, comprising the following steps: Step 1: placing a sampling tube to be used in a sampling box, and when it is needed, installing the sampling tube on a sampling barrel to perform sampling in batches; Step 2: using a vacuum cylinder in the sampling barrel to generate a negative pressure state in the sampling barrel, so that the food to be detected can be adsorbed in the sampling tube; Step 3: taking out the sampling tube from the sampling barrel, and still storing it in the corresponding position of the sampling box, and using a temperature sensor at the bottom of the sampling box to detect the ambient temperature in the sampling box. This sampling method for food detection can sample different foods separately by setting a sampling box, a sampling barrel and a sampling tube, and store the samples in different sampling tubes so that they cannot interfere with each other, thereby ensuring the accuracy of later detection, and the sampling tube is fixed in the fixed barrel of the sampling barrel by a limit rod, and the sampling barrel can be reused, and only different sampling tubes need to be replaced.

Description

A sampling method for food testing

Technical Field

The invention relates to the technical field of food sampling, and in particular to a sampling method for food detection.

Background technique

Food safety testing is to detect harmful substances in food according to national indicators, mainly some harmful and toxic indicators, such as heavy metals, aflatoxin, etc. An important aspect of food science and engineering is to introduce and apply chemical unit operations and develop food engineering unit operations, so as to promote the development of the food industry in the direction of large-scale, continuous and automated. With the improvement of people's living standards, people's concepts have changed from how to eat enough to how to eat well and eat safely, so the quality and safety of food have received more and more attention. However, recently, food safety problems such as various pathogenic bacteria, pesticide residues, antibiotics and biological toxins have frequently appeared. Food safety issues not only affect the lives and property of the general public, but also restrict the economic development of the entire country. .

Food testing is based on products and physical and chemical index testing is a teaching project. It includes food sensory testing, quality testing of milk and dairy products, quality testing of beverage products, quality testing of alcoholic products, quality testing of vegetable oils, and quality testing of meat and egg products. Food safety testing is an important basis for ensuring food safety. Due to the different types of food and different inspection occasions, there are many types of commonly used food testing sampling devices.

Food inspection in a broad sense refers to a discipline that studies and evaluates food quality and its changes. It is based on some basic theories and various technologies of physics, chemistry and biochemistry, and in accordance with established technical standards, such as international and national food hygiene/safety standards, to inspect the quality of food raw materials, auxiliary materials, semi-finished products, finished products and by-products to ensure the quality of the products. The content of food inspection includes sensory testing of food, testing of nutrients, additives and harmful substances in food, etc.

The existing detection sampling device has a simple structure, a single function, and is inconvenient to take and put. Moreover, after sampling, it needs to be disinfected and cleaned again before sampling again. Therefore, we make improvements on this and propose a sampling method for food detection.

Summary of the invention

In order to solve the above technical problems, the present invention provides the following technical solutions:

The present invention provides a sampling method for food detection, comprising the following steps:

Step 1: Place the sampling tube to be used in the sampling box. When it is needed, install the sampling tube on the sampling cylinder to take samples in batches;

Step 2: A negative pressure state is generated in the sampling tube through the vacuum cylinder in the sampling tube, so that the food to be tested can be adsorbed in the sampling tube;

Step 3: Take out the sampling tube from the sampling cylinder and store it in the corresponding position of the sampling box. Use the temperature sensor at the bottom of the sampling box to detect the ambient temperature in the sampling box.

Step 4: Cover the box, manage the sampled food, and complete the sampling task;

The sampling device used in the present invention includes a sampling cylinder, a sampling box, a heating base and a sampling tube, one end of the sampling cylinder is fixedly connected to a fixed cylinder, a partition plate is installed at the end of the sampling cylinder close to the fixed cylinder, and a vacuum cylinder is installed on the side of the partition plate away from the fixed cylinder, the partition plate is connected to one end of the sampling cylinder through a fixed ring, and two limit rods are vertically connected to the fixed ring, the limit rod passes through the fixed ring and is fixedly connected to a limit block, and the limit block is connected to the inner wall of the sampling cylinder through a tension spring.

As a preferred technical solution of the present invention, a heating base is provided at the bottom of the sampling box, and a box cover is provided at the top of the sampling box. A partition column is provided inside the sampling box, and the sampling tube is arranged in the partition column of the sampling box.

As a preferred technical solution of the present invention, the sampling box and the heating base are respectively fixedly connected with fixing blocks, and the fixing blocks are connected by fixing screws.

As a preferred technical solution of the present invention, two adjustment grooves are provided on the surface of the sampling cylinder, and a push block is slidably arranged in the adjustment groove. A steel wire rope is fixedly connected to one end of the limit rod close to the sampling cylinder, and the steel wire rope passes through the sampling cylinder and extends to the adjustment groove. One end of the steel wire rope extending into the adjustment groove is fixedly connected to the push block.

As a preferred technical solution of the present invention, a limiting ring is provided at one end of the sampling tube, and the limiting ring is arranged on the surface of the sampling tube.

As a preferred technical solution of the present invention, an observation port is provided on the surface of the fixed cylinder, a piston rod is installed in the vacuum cylinder, and one end of the piston rod passes through the vacuum cylinder and extends to the outside of the sampling cylinder.

As a preferred technical solution of the present invention, an opening is provided on the partition plate, and the fixing cylinder is connected to the vacuum cylinder through the opening.

The beneficial effects of the present invention are as follows: the sampling method for food detection can sample different foods separately by setting a sampling box, a sampling barrel and a sampling tube, and the samples are stored in different sampling tubes so that they cannot interfere with each other, thereby ensuring the accuracy of later detection, and the sampling tube is fixed in the fixed barrel of the sampling barrel by a limiting rod, and the sampling barrel can be reused, and only different sampling tubes need to be replaced;

A detachable heating base is set at the bottom of the sampling box, which can facilitate the cleaning of the sampling box and ensure the cleanliness and hygiene of the sampling box. It can provide help and guidance for the sampling process in rapid food safety testing, reasonably allocate sampling tasks, and make the sampling process more intelligent, more accurate and reliable, thus realizing centralized sampling and testing of large quantities of food, with higher sampling efficiency and more convenient use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a sampling box of a sampling method for food detection according to the present invention;

FIG2 is a schematic diagram of the structure of a sampling tube of a sampling method for food detection according to the present invention;

FIG3 is a schematic diagram of the structure of a sampling method for food detection according to the present invention;

FIG4 is an enlarged view of point A in FIG3 of the present invention;

FIG. 5 is a flow chart of a sampling method for food testing according to the present invention.

In the figure: 1. Sampling cylinder; 2. Piston pull rod; 3. Adjustment slot; 4. Push block; 5. Fixed cylinder; 6. Observation port; 7. Limiting ring; 8. Sampling tube; 9. Vacuum cylinder; 10. Box cover; 11. Partition plate; 12. Sampling box; 13. Limiting rod; 14. Tension spring; 15. Wire rope; 16. Heating base.

Detailed ways

The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

Embodiment: As shown in Figures 1-5, the present invention provides a sampling method for food detection, comprising the following steps:

Step 1: Place the sampling tube to be used in the sampling box. When it is needed, install the sampling tube on the sampling cylinder to take samples in batches;

Step 2: A negative pressure state is generated in the sampling tube through the vacuum cylinder in the sampling tube, so that the food to be tested can be adsorbed in the sampling tube;

Step 3: Take out the sampling tube from the sampling cylinder and store it in the corresponding position of the sampling box. Use the temperature sensor at the bottom of the sampling box to detect the ambient temperature in the sampling box.

Step 4: Cover the box, manage the sampled food, and complete the sampling task;

The sampling device used in the present invention includes a sampling cylinder 1, a sampling box 12, a heating base 16 and a sampling tube 8. One end of the sampling cylinder 1 is fixedly connected to a fixed cylinder 5. A partition plate 11 is installed at the end of the sampling cylinder 1 close to the fixed cylinder 5, and a vacuum cylinder 9 is installed on the side of the partition plate 11 away from the fixed cylinder 5. The partition plate 11 is connected to one end of the sampling cylinder 1 through a fixed ring, and two limit rods 13 are vertically connected to the fixed ring. The limit rod 13 passes through the fixed ring and is fixedly connected to a limit block. The limit block is connected to the inner wall of the sampling cylinder 1 through a tension spring 14.

A heating base 16 is provided at the bottom of the sampling box 12 , and a box cover 10 is provided at the top of the sampling box 12 . A partition column is provided inside the sampling box 12 , and the sampling tube 8 is arranged in the partition column of the sampling box 12 .

The sampling box 12 and the heating base 16 are respectively fixedly connected with fixing blocks, and the fixing blocks are connected by fixing screws.

Among them, two adjustment grooves 3 are opened on the surface of the sampling tube 1, and a push block 4 is slidably arranged in the adjustment groove 3. A steel wire rope 15 is fixedly connected to one end of the limit rod 13 close to the sampling tube 1, and the steel wire rope 15 passes through the sampling tube 1 and extends to the adjustment groove 3. The end of the steel wire rope 15 extending into the adjustment groove 3 is fixedly connected to the push block 4.

Among them, a limiting ring 7 is provided at one end of the sampling tube 8 , and the limiting ring 7 is arranged on the surface of the sampling tube 8 .

The surface of the fixed cylinder 5 is provided with an observation port 6 , a piston rod 2 is installed in the vacuum cylinder 9 , and one end of the piston rod 2 passes through the vacuum cylinder 9 and extends to the outside of the sampling cylinder 1 .

The partition plate 11 is provided with an opening, and the fixing cylinder 5 is connected to the air extraction cylinder 9 through the opening.

Working principle: Place the sampling tube 8 to be used in the sampling box 12, and when it is needed, install the sampling tube 8 on the sampling cylinder 1 to take samples in batches. One end of the fixed cylinder 5 is sleeved on the surface of the sampling tube 8 and then pressed inward. When the fixed cylinder 5 contacts the surface of the partition plate 11, the limit rod 13 supports the tension spring 14, and the limit ring 7 is clamped on one side of the limit rod 13 to complete the fixation. Through the vacuum cylinder 9 in the sampling cylinder 1, a negative pressure state is generated in the sampling cylinder 1, so that the sampling tube 8 can absorb the food to be tested. When the piston pull rod 2 is pulled, the sampling tube 8 absorbs the food, and the sampled food enters the sampling tube 8, pushing the push blocks 4 on both sides. , so that the push block 4 pulls the wire rope 15, thereby driving the limit rod 13 to move, the limit ring 7 is no longer restricted, and the sampling tube 8 is taken out from the sampling cylinder 1 and is still stored in the corresponding position of the sampling box 12. The temperature sensor at the bottom of the sampling box 12 is used to detect the ambient temperature in the sampling box 12, and the box cover 10 is closed. By setting the sampling box 12, the sampling cylinder 1 and the sampling tube 8, different foods can be sampled separately, and the samples can be stored in different sampling tubes 8, so that they cannot interfere with each other, thereby ensuring the accuracy of later detection, and the sampling tube 8 is fixed in the fixed tube 5 of the sampling cylinder 1 by the limit rod 13, and the sampling cylinder 1 can be reused, and only different sampling tubes 8 need to be replaced;

A detachable heating base 16 is provided at the bottom of the sampling box 12, which can facilitate the cleaning of the sampling box 12 and ensure the cleanliness and hygiene of the sampling box 12. It can provide help and guidance for the sampling process in rapid food safety testing, reasonably allocate sampling tasks, make the sampling process more intelligent, more accurate and reliable, and realize centralized sampling and testing of large quantities of food, with higher sampling efficiency and more convenient use.

Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (3)

1. A sampling method for food detection, comprising the steps of:

step one: placing a sampling tube to be used in a sampling box, and when the sampling tube is required to be used, mounting the sampling tube on the sampling tube for batch sampling;

Step two: the sampling tube is internally provided with a sampling tube, and the sampling tube is internally provided with a suction tube;

step three: taking out the sampling tube from the sampling tube, still storing the sampling tube at a position corresponding to the sampling box, and detecting the ambient temperature in the sampling box by using a temperature sensor at the bottom of the sampling box;

Step four: covering a box cover, managing sampled foods and completing a sampling task;

the sampling device comprises a sampling cylinder (1), a sampling box (12), a heating base (16) and a sampling tube (8), wherein one end of the sampling cylinder (1) is fixedly connected with a fixed cylinder (5), a partition plate (11) is arranged at one end, close to the fixed cylinder (5), of the sampling cylinder (1), a suction cylinder (9) is arranged at one side, far away from the fixed cylinder (5), of the partition plate (11), the partition plate (11) is connected with one end of the sampling cylinder (1) through a fixed ring, two limiting rods (13) are vertically connected onto the fixed ring, and the limiting rods (13) penetrate through the fixed ring and are fixedly connected with limiting blocks, and the limiting blocks are connected with the inner wall of the sampling cylinder (1) through tension springs (14);

Two adjusting grooves (3) are formed in the surface of the sampling tube (1), a pushing block (4) is arranged in the adjusting grooves (3) in a sliding mode, one end, close to the inside of the sampling tube (1), of the limiting rod (13) is fixedly connected with a steel wire rope (15), the steel wire rope (15) penetrates through the sampling tube (1) and extends to the adjusting grooves (3), and one end, extending to the inside of the adjusting grooves (3), of the steel wire rope (15) is fixedly connected to the pushing block (4);

One end of the sampling tube (8) is provided with a limiting ring (7), and the limiting ring (7) is arranged on the surface of the sampling tube (8);

An observation port (6) is formed in the surface of the fixed cylinder (5), a piston pull rod (2) is arranged in the air extraction cylinder (9), and one end of the piston pull rod (2) penetrates through the air extraction cylinder (9) and extends to the outer side of the sampling cylinder (1);

An opening is formed in the partition plate (11), and the fixed cylinder (5) is communicated with the air suction cylinder (9) through the opening.

2. The sampling method for food detection according to claim 1, wherein the bottom of the sampling box (12) is provided with a heating base (16), the top of the sampling box (12) is provided with a box cover (10), a partition is arranged in the sampling box (12), and the sampling tube (8) is arranged in the partition of the sampling box (12).

3. The sampling method for food detection according to claim 1, wherein the sampling box (12) and the heating base (16) are respectively fixedly connected with a fixed block, and the fixed blocks are connected through fixing screws.