A method of quantitative sampling for food testing

Abstract

The present application relates to food detection technical field, specifically to a kind of quantitative sampling food detection method, including the detection bottle is sleeved into the top of sampling rod;Again hold sampling rod and constantly up and down, and drive the blade of broken material to rotate and chop food into dilution state;Then hold sampling rod and down, so that diluted food is pressed into sampling rod by pressing plate, and into detection bottle, then remove detection bottle and put into food detection instrument passage to analyze and detect component.The present application is diluted food by the sampling box, only needs to operate sampling rod up and down, and its operation is simple and easy to operate;Meanwhile, the sampling rod drives the pressing plate to press the diluted food from the bottom to the top of sampling rod, and flows into detection bottle, and the scale can be observed and the sampling rod descending speed is controlled to quantitatively sample, in the process, detection bottle is placed on the top of sampling rod, which is easy to operate and collect, to ensure sampling under the sealed state of sampling box.It has popularization and use value.

Description

Technical Field

[0001] This invention relates to the field of food testing technology, specifically a quantitative sampling method for food testing. Background Technology

[0002] Food safety testing involves detecting harmful substances in food according to national standards, primarily focusing on harmful and toxic indicators such as heavy metals and aflatoxin. Quantitative sampling devices for food testing are instruments used to quantitatively sample food. These devices play a crucial role in people's lives because they assist users in rapid sampling; therefore, they are commonly used in various automated equipment to reduce labor costs and improve testing efficiency in food factories.

[0003] Chinese utility model patent application (CN201921386215.6) discloses a food testing instrument for convenient quantitative sampling, comprising a sampling device and a testing device. The testing device is fixedly installed below the sampling device. The sampling device includes a sampling box, with a sampling tube connected to the bottom of the right outer wall of the sampling box. A tube head is fixedly installed at the end of the sampling tube away from the sampling box, and a hanging ring is fixedly installed on the outer wall of the tube head. This convenient food testing instrument allows for automatic sampling by placing the tube head in the food solution to be tested and starting the drive motor to reverse. After one sampling, the instrument utilizes a quantitative cylinder, a three-way valve, and various valves to repeatedly open and close the first, second, and third valves, allowing for multiple quantitative measurements of the sample solution for testing. This simplifies the operation process and improves testing efficiency.

[0004] Food includes liquid food and solid food. The sampling device of the above patent can only sample liquid food. Its manual operation is troublesome and easy to cause confusion, making it inconvenient for beginners. It also lacks protective measures when removing the metering cylinder and is not convenient for rapid collection and testing of the metering cylinder. Summary of the Invention

[0005] The purpose of this invention is to provide a quantitative sampling method for food testing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a quantitative sampling method for food detection, comprising the following steps:

[0007] S1. First, put the edible portion of the food to be tested into the sampling box and close the lid.

[0008] S2. Then, insert the test bottle onto the top of the sampling rod;

[0009] S3. Hold the sampling rod and move it up and down repeatedly, which will cause the crushing blade to rotate and chop the food into a diluted state.

[0010] S4. Then rotate the dispensing lever to open the dispensing platform and let the diluted food down to the bottom of the dispensing platform;

[0011] S5. Then pull out the pin and hold the lower part of the sampling rod to press the diluted food into the sampling rod by the pressure plate and into the test bottle. Then remove the test bottle and put it into the food testing instrument channel to analyze the test components.

[0012] S6. Observe the scale on the test bottle and control the speed and depth of the sampling rod until the diluted food reaches the predetermined scale.

[0013] As a further improvement to this technical solution, it also includes a sampling box and a box cover with an open center that is snapped into the top port. A material distribution platform is snapped into the middle of the sampling box. A pair of crushing blades are sleeved on the top surface of the material distribution platform. A material distribution rod is inserted into the radial side below the material distribution platform. A sampling rod is set on the central axis of the box cover. A pressure plate that is elastically connected to the central opening of the box cover is inserted into the outside of the sampling rod. A pin that is inserted into the pressure plate is set on the top surface of the box cover. A needle is provided at the top of the sampling rod. A test bottle is sleeved on the needle.

[0014] As a further improvement to this technical solution, a ring is provided on the central axis of the pair of crushing blades and a guide post is provided on the inner wall of the ring. The guide post is arranged in a direction corresponding to the crushing blade. A pair of spirally extending guide grooves are opened on the outer side of the bottom of the sampling rod. The guide post is engaged with the guide groove and can slide.

[0015] As a further improvement to this technical solution, a collar is provided at the center of the top surface of the material distribution platform, and a telescopic tube is provided at the center of the bottom surface of the pressure plate to be sleeved with the sampling rod. A connecting ring is provided at the bottom of the telescopic tube. The cross-sections of the collar and the connecting ring are both L-shaped and are engaged with the circular ring on the central axis of the crushing blade and can rotate.

[0016] As a further improvement to this technical solution, the central axis of the sampling rod is provided with a material inlet cavity that runs through its upper and lower ends, and a material extraction tube that is inserted into the sampling rod is provided on the central axis below the material distribution platform. The inner diameter of the lower half of the material extraction tube is larger than the outer diameter of the sampling rod.

[0017] As a further improvement to this technical solution, a hopper is provided on the bottom surface of the material distribution platform and on the outer side of the upper half of the material receiving pipe. Several discharge ports are provided at the connection between the hopper and the material receiving pipe. A leakage hole communicating with the inside of the hopper is provided on the top surface of the material distribution platform.

[0018] As a further improvement to this technical solution, the inner end of the material distribution rod is fitted with a semi-circular block that engages with the material leakage hole.

[0019] As a further improvement to this technical solution, the bottom surface of the test bottle has an opening at the center and a sealing gasket is attached thereto, and the sealing gasket has a straight slit at its center.

[0020] As a further improvement to this technical solution, a corrugated sheet is bonded between the pressure plate and the box cover, a guide sleeve with a square hole structure is provided at the center of the pressure plate, and a square rod is provided at the top of the sampling rod to engage with the guide sleeve.

[0021] As a further improvement to this technical solution, a spring is fitted on the outer side of the guide sleeve, and a platform is provided on the top outer side of the sampling rod, the outer diameter of which is larger than the major diameter of the spring.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In this quantitative sampling food testing method, diluted food is prepared using a sampling box. The process is simple and easy to learn; simultaneously, the sampling rod drives a pressure plate to press the diluted food back up from the bottom to the top of the sampling rod, flowing into the test bottle. Quantitative sampling is achieved by observing the scale and controlling the descent speed of the sampling rod. During this process, the test bottle is placed on top of the sampling rod, facilitating operation and collection, and ensuring sampling is performed in a sealed state within the sampling box. This method has significant potential for widespread application. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0025] Figure 2 This is a schematic diagram of the overall internal structure of Example 1;

[0026] Figure 3 This is an overall cross-sectional view of Example 1;

[0027] Figure 4 This is a schematic diagram of the sampling rod assembly structure in Example 1;

[0028] Figure 5 This is a full sectional view of the material distribution table in Example 1;

[0029] Figure 6 This is a full sectional view of the sampling rod in Example 1;

[0030] Figure 7 This is a breakdown diagram of the sampling box in Example 1;

[0031] Figure 8 This is a split view of the material distribution table in Example 1;

[0032] Figure 9 This is an assembly disassembly diagram of the sampling rod and test bottle in Example 1;

[0033] Figure 10This is a schematic diagram of the test bottle structure in Example 1;

[0034] Figure 11 This is a front view of the box lid of Example 1.

[0035] The meanings of the labels in the diagram are as follows:

[0036] 100. Sampling box; 110. Box lid; 111. Pin; 120. Distributor; 121. Feeding tube; 122. Hopper; 123. Discharge port; 124. Leakage hole; 125. Collar;

[0037] 130. Crushing blade; 131. Guide post; 140. Dividing rod; 141. Semi-circular block;

[0038] 200. Sampling rod; 201. Needle; 202. Guide groove; 203. Feeding chamber; 204. Sleeve platform; 205. Square rod;

[0039] 210. Pressure plate; 211. Corrugated sheet; 212. Telescopic tube; 213. Connecting ring; 214. Guide sleeve; 220. Spring; 300. Test bottle; 301. Sealing gasket. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the terms "central axis," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0042] Please see Figures 1-11 As shown, the present invention provides a method for quantitative sampling and food testing, comprising the following steps:

[0043] S1. First, put the edible portion of the food to be tested into the sampling box 100 and close the box lid 110.

[0044] S2. Then, insert the test bottle 300 onto the top of the sampling rod 200;

[0045] S3. Hold the sampling rod 200 and move it up and down repeatedly, which will drive the crushing blade 130 to rotate and chop the food into a diluted state. The axial lifting and lowering motion of the sampling rod 200 drives the axial rotation of the crushing blade 130, so that the operation and sampling are combined into one place;

[0046] S4. Then rotate the dispensing rod 140 to open the dispensing table 120 and let the diluted food down to the bottom of the dispensing table 120.

[0047] S5. Then pull out the pin 111 and hold the sampling rod 200 down, which will drive the pressure plate 210 into the sampling box 100. Since the sampling box 100 is in a sealed state, the pressure plate 210 can squeeze the air above the sampling box 100 to press the diluted food below into the sampling rod 200 and into the test bottle 300 to complete the sampling.

[0048] S6. Observe the scale of the test bottle 300 and control the speed and depth of the sampling rod 200 until the diluted food reaches the predetermined scale to complete the quantitative sampling. Then remove the test bottle 300 and place it into the food testing instrument channel to analyze the detected components.

[0049] The present invention also includes a sampling box 100 and a box cover 110 with an open center that is snapped into the top port. A material distribution platform 120 is snapped into the middle of the sampling box 100, dividing the internal space of the sampling box 100 into two halves. A pair of crushing blades 130 are sleeved on the top surface of the material distribution platform 120. A material distribution rod 140 is inserted into the radial side below the material distribution platform 120. A sampling rod 200 is set on the central axis of the box cover 110. The sampling rod 200 can move in the upper and lower spaces divided by the sampling box 100, thereby driving the crushing blades 130 to rotate and crush the food placed on the material distribution platform 120.

[0050] A pressure plate 210 is inserted into the outer side of the sampling rod 200 and is elastically connected to the central opening of the box cover 110. The pressure plate 210 is used to press down and squeeze the diluted food in the sampling box 100 into the sampling rod 200. A pin 111 is provided on the top surface of the box cover 110 and is inserted into the pressure plate 210, so that when the sampling rod 200 moves up and down, the pressure plate 210 is locked in the box cover 110 by the pin 111.

[0051] The top of the sampling rod 200 is equipped with a needle 201, and the needle 201 is connected to a test bottle 300. Diluted food entering the sampling rod 200 passes through the needle 201 into the test bottle 300 to complete the sampling.

[0052] Specifically, a ring is provided on the central axis of a pair of crushing blades 130, and a guide post 131 is provided on the inner wall of the ring. The guide post 131 is arranged in a corresponding direction to the crushing blades 130. A pair of spirally extending guide grooves 202 are provided on the outer side of the bottom of the sampling rod 200. The guide post 131 is engaged with the guide groove 202 and can slide. The thread helix angle of the guide groove 202 is calculated according to the formula of the thread helix angle, so that when the sampling rod 200 moves axially, the guide post 131 can climb and move in the guide groove 202.

[0053] The top surface of the dispensing platform 120 is provided with a collar 125 at its center, and the bottom surface of the pressure plate 210 is provided with a telescopic tube 212 that is sleeved with the sampling rod 200. The bottom of the telescopic tube 212 is provided with a connecting ring 213. The cross-sections of the collar 125 and the connecting ring 213 are both L-shaped and are engaged with the ring on the central axis of the crushing blade 130 and can rotate. Since the crushing blade 130 is clamped and positioned by the dispensing platform 120 and the telescopic tube 212, when the sampling rod 200 moves axially, it will inevitably use the guide groove 202 to drive the crushing blade 130 to rotate axially, thus completing the crushing of the food on the dispensing platform 120.

[0054] Furthermore, the sampling rod 200 has a central shaft with a feeding chamber 203 extending through its upper and lower ends for introducing diluted food from the bottom of the sampling rod 200 to its top; the feeding platform 120 has a feeding tube 121 on its central shaft below, which is inserted into the sampling rod 200. The inner diameter of the lower half of the feeding tube 121 is larger than the outer diameter of the sampling rod 200, so that the lower half of the feeding tube 121 has space to accommodate the diluted food so that it can smoothly enter the feeding chamber 203 of the sampling rod 200.

[0055] A hopper 122 is provided on the bottom surface of the dispensing platform 120 and on the outer side of the upper half of the dispensing pipe 121 for temporarily storing diluted food. Several outlets 123 are provided at the connection between the hopper 122 and the dispensing pipe 121 for leaking diluted food into the lower half of the dispensing pipe 121.

[0056] The top surface of the dispensing platform 120 is provided with a leakage hole 124 that communicates with the inside of the hopper 122, which is used to guide the diluted food in the sampling box 100 into the hopper 122; the inner end of the dispensing rod 140 is sleeved with a semi-circular block 141 that engages with the leakage hole 124; the dispensing rod 140 passes through the sampling box 100 and can rotate; the leakage hole 124 is blocked and opened by rotating the semi-circular block 141 up and down.

[0057] Furthermore, the bottom center of the test bottle 300 has an opening and a sealing gasket 301 is attached thereto. The sealing gasket 301 has a straight slit in the center. The sealing gasket 301 is made of rubber material. By utilizing its sealing and elasticity, a sealed state is formed. A needle 201 can be inserted into the test bottle 300 by passing through the straight slit.

[0058] Specifically, a corrugated sheet 211 is bonded between the pressure plate 210 and the lid 110. The corrugated sheet 211 is made of PP material, which allows the pressure plate 210 and the lid 110 to move in a misaligned manner while maintaining a sealed state. The center of the pressure plate 210 is provided with a guide sleeve 214 with a square hole structure, and the top of the sampling rod 200 is provided with a square rod 205 that fits into the guide sleeve 214, so that the sampling rod 200 does not rotate axially and there is no need to manually control the sampling rod 200 to prevent rotation.

[0059] A spring 220 is fitted on the outer side of the guide sleeve 214, and a platform 204 is provided on the top outer side of the sampling rod 200. The platform 204 is made of transparent material, which makes it easy to observe the test bottle 300. The outer diameter of the platform 204 is larger than the large diameter of the spring 220. The platform 204 limits the spring 220, and the rebound pressure plate 210 is pressed down. By moving the sampling rod 200 upward, the pressing depth of the pressure plate 210 can be controlled, and the scale of the test bottle 300 can be observed to control the quantitative sampling of food.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for quantitative sampling in food testing, characterized in that: Includes the following steps: S1. First, put the food to be tested and the edible part into the sampling box (100) and close the box lid (110). S2. Then, insert the test bottle (300) onto the top of the sampling rod (200); S3. Hold the sampling rod (200) and move it up and down continuously, which will drive the crushing blade (130) to rotate and crush the food into a diluted state; S4. Then rotate the dispensing rod (140) to open the dispensing table (120) and let the diluted food drip down to the bottom of the dispensing table (120); S5. Then pull out the pin (111) and hold the sampling rod (200) to make the diluted food be pressed into the sampling rod (200) by the pressure plate (210) and enter the test bottle (300); S6. Observe the scale of the test bottle (300) and control the speed and depth of the sampling rod (200) until the diluted food reaches the predetermined scale. Then remove the test bottle (300) and put it into the food testing instrument channel to analyze the test components. The quantitative sampling food testing method also includes a sampling box (100) and a box cover (110) with an open center that is snapped into the top port. A dispensing platform (120) is snapped into the middle of the sampling box (100). A pair of crushing blades (130) are fitted on the top surface of the dispensing platform (120). A dispensing rod (140) is inserted into the radial side below the dispensing platform (120). A sampling rod (200) is set on the central axis of the box cover (110). A pressure plate (210) that is elastically connected to the central opening of the box cover (110) is inserted into the outside of the sampling rod (200). A pin (111) that is inserted into the pressure plate (210) is set on the top surface of the box cover (110). A needle (201) is set on the top of the sampling rod (200). A test bottle (300) is fitted into the outer sleeve of the needle (201). The sampling rod (200) has a feeding cavity (203) extending through its upper and lower ends on its central axis. The material distribution platform (120) has a material taking tube (121) on its central axis below, which is inserted into the sampling rod (200). The inner diameter of the lower half of the material taking tube (121) is larger than the outer diameter of the sampling rod (200).

2. The food detection method for quantitative sampling according to claim 1, characterized in that: A ring is provided on the central axis of a pair of crushing blades (130), and a guide post (131) is provided on the inner wall of the ring. The guide post (131) is arranged in a direction corresponding to the crushing blade (130). A pair of spirally extending guide grooves (202) are provided on the outer side of the bottom of the sampling rod (200). The guide post (131) is engaged with the guide groove (202) and can slide.

3. The food detection method for quantitative sampling according to claim 2, characterized in that: The top surface of the material distribution platform (120) is provided with a collar (125) at the center, and the bottom surface of the pressure plate (210) is provided with a telescopic tube (212) that is sleeved with the sampling rod (200). The bottom of the telescopic tube (212) is provided with a connecting ring (213). The cross-sections of the collar (125) and the connecting ring (213) are both L-shaped and are engaged with the circular ring on the central axis of the crushing blade (130) and can rotate.

4. The food detection method for quantitative sampling according to claim 3, characterized in that: A hopper (122) is provided on the bottom surface of the material distribution platform (120) and on the outer side of the upper half of the material receiving pipe (121). Several discharge ports (123) are provided at the connection between the hopper (122) and the material receiving pipe (121). A leakage hole (124) communicating with the inside of the hopper (122) is provided on the top surface of the material distribution platform (120).

5. The food detection method for quantitative sampling according to claim 4, characterized in that: The inner end of the material distribution rod (140) is fitted with a semi-circular block (141) that engages with the material leakage hole (124).

6. The food detection method for quantitative sampling according to claim 1, characterized in that: The bottom center of the test bottle (300) has an opening and a sealing gasket (301) is attached thereto. The center of the sealing gasket (301) has a straight slit.

7. The food detection method for quantitative sampling according to claim 1, characterized in that: A corrugated sheet (211) is bonded between the pressure plate (210) and the box cover (110). The center of the pressure plate (210) is provided with a guide sleeve (214) with a square hole structure. The top of the sampling rod (200) is provided with a square rod (205) that is sleeved with the guide sleeve (214).

8. The food detection method for quantitative sampling according to claim 7, characterized in that: A spring (220) is fitted on the outer side of the guide sleeve (214), and a platform (204) is provided on the top outer side of the sampling rod (200). The outer diameter of the platform (204) is larger than the major diameter of the spring (220).

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