Food detection method and food detection sampling device capable of sampling for multiple times

Abstract

The invention relates to the field of powder sampling, in particular to a food detection method and a food detection sampling device capable of sampling for multiple times, the food detection sampling device capable of sampling for multiple times comprises an outer sleeve, an inner sleeve, an extrusion block, a drawing assembly, a limiting block, a clamping assembly and the like; an inner sleeve is slidably connected in the outer sleeve; an extrusion block used for preventing powder blockage is slidably connected into the inner sleeve. A drawing assembly is mounted on the extrusion block; a limiting block convenient for manual quantitative sampling is slidably connected in the inner sleeve; a clamping assembly used for clamping a sealing bag is installed on the inner sleeve. The outer sleeve is inserted into the packaging bag to be kept static, so that the outer sleeve does not need to be manually and repeatedly pushed and pulled, friction is caused to the crevasse position of the packaging bag, the crevasse position is prevented from being enlarged, meanwhile, the crevasse position of the packaging bag is pressed and plugged through the limiting part, part of powder is prevented from directly falling off from the crevasse position, and the packaging efficiency is improved. And resource waste is caused.

Description

Technical Field

[0001] The invention relates to the field of powder sampling, and in particular to a food detection method and a food detection sampling device capable of multiple sampling. Background Art

[0002] In the prior art, when manually sampling and testing powder samples in packaging bags, a sealed bag (i.e., a sampling bag) is usually first put on the feeding part at the end of the sampling tube, and then the tip of the sampling tube mouth is inserted into the packaging bag to form a breach on the surface of the packaging bag that is consistent with the diameter of the sampling tube. Since some powders have poor fluidity, such as soy milk powder and sesame powder, it is necessary to manually push and pull the sampling tube repeatedly so that the powder sample can fall into the sealed bag through the sampling tube. However, repeated friction of the sampling tube on the breach of the packaging bag will cause the breach to increase, so that during the sampling process, part of the powder falls directly from the breach, resulting in a waste of resources. At the same time, the operator's body and work area will be contaminated by the powder, affecting the working environment.

[0003] At the same time, during the sampling process, in order to prevent the powder sample from falling to the outside, it is necessary to manually hold the sealing bag and the feeding port of the sampling tube, and press the bag mouth of the sealing bag tightly against the feeding port of the sampling tube, so that the sealing bag always wraps the feeding port of the sampling tube. In the process of manually holding the sealing bag and the feeding port of the sampling tube, as the amount of powder sample in the bag increases, the overall mass of the sealing bag increases. In order to prevent the sealing bag from falling off, the holding posture is usually adjusted unconsciously, resulting in repeated squeezing of the bag mouth by the hand, causing the sealing strip on the sealing bag to twist, affecting the sealing effect of the sealing bag, and causing external dust and microorganisms to enter the sealing bag through the gap in the bag mouth and contaminate the sample.

[0004] In summary, the present application proposes a food detection method and a food detection sampling device capable of multiple sampling to improve the above-mentioned technical problems. Summary of the invention

[0005] In order to overcome the shortcomings of the existing method for sampling powder in packaging bags, which will lead to the enlargement of the packaging bag's rupture, so that during the sampling process, part of the powder will fall directly from the rupture, resulting in a waste of resources. At the same time, when the sealed bag is manually held, the hand will repeatedly squeeze the bag opening of the sealed bag, which will affect the sealing effect of the sealed bag, causing external dust and microorganisms to enter the sealed bag through the gap of the bag opening of the sealed bag and contaminate the sample, the present invention provides a food detection method and a food detection sampling device capable of multiple sampling.

[0006] Technical solution: A food testing method, comprising the following steps: S1: Piercing sampling, hold the outer sleeve, pierce the food packaging bag at a suitable angle, and then push and pull the extrusion block left and right repeatedly to squeeze the powder in the packaging bag into the inner sleeve; S2: Obtain the sample. After the sample powder reaches the required sampling amount, pull the extrusion block and the limit block to the right, so that the powder located between the extrusion block and the limit block is driven to the material discharge port of the inner sleeve and finally falls into the sampling bag. S3: Sample processing. Transfer the sampling bag containing the sample to the dedicated sample processing area of the laboratory for testing.

[0007] A food detection sampling device capable of sampling multiple times, including an outer sleeve and an inner sleeve; the inner sleeve is slidably connected inside the outer sleeve; a material discharge port is provided on the right side of the inner sleeve; both the outer sleeve and the inner sleeve are made of transparent materials; it also includes an extrusion block, a pulling component, a limit block and a clamping component; an extrusion block for preventing powder blockage is slidably connected inside the inner sleeve; a pulling component is installed on the extrusion block, and the pulling component is used to drive the extrusion block to slide on the inner sleeve; a limit block for facilitating manual quantitative sampling is slidably connected inside the inner sleeve; an end cover is provided on the right side of the inner sleeve; the limit block consists of a round block and a round rod, the round rod penetrates the end cover, and a spring is fixedly connected between the round block of the limit block and the end cover; scale lines are provided on the outer wall of the inner sleeve; the round block of the limit block is located to the left of the material discharge port of the inner sleeve, and the round block is located at the starting position of the scale line; a clamping component for clamping the sealing bag is installed on the inner sleeve.

[0008] Optionally, in the above-mentioned food detection sampling device capable of sampling multiple times, an air groove is provided on the inner sleeve, and a filter cloth for intercepting powder is provided on the air groove.

[0009] Optionally, in the above-mentioned food detection sampling device capable of sampling multiple times, the pulling component includes a connecting rod and a ring; several connecting rods are fixedly connected to the extrusion block; the inner sleeve is jointly composed of an upper half ring and a lower half ring; several sliding grooves are formed after the upper half ring and the lower half ring are combined, and each connecting rod slides on the adjacent sliding grooves; a ring is fixedly connected between the two connecting rods.

[0010] Optionally, in the above-mentioned food detection sampling device capable of sampling multiple times, the clamping component includes a limit rod, a lever, a fixed rod, a first connection frame and a second connection frame; a limit rod is fixedly connected to the lower side of the inner sleeve; several levers are rotatably connected to the limit rod through torsion springs; a fixed rod is fixedly connected to each lever, and all the fixed rods are symmetrically arranged front and back; a first connection frame is fixedly connected at the material discharge port of the inner sleeve; a second connection frame is slidably arranged on the right side of the inner sleeve; the first connection frame and the second connection frame jointly form a material discharge channel.

[0011] Optionally, in the above-mentioned food detection sampling device capable of sampling multiple times, the first connection frame and the second connection frame are set to be connected in a damped sliding manner, and the second connection frame can slide left and right between the first connection frame and the inner sleeve.

[0012] Optionally, in the above food detection sampling device capable of multiple samplings, a rubber sleeve is provided on the surface of each fixing rod.

[0013] Optionally, in the above food detection sampling device capable of multiple samplings, the extrusion block is set to a conical shape.

[0014] Optionally, in the above food detection sampling device capable of multiple samplings, it further includes a bent arc block and a spreading plate; several bent arc blocks are rotatably connected to the first connecting frame through torsion springs; a spreading plate for spreading the sealing bag is fixedly connected to each bent arc block.

[0015] Optionally, in the above food detection sampling device capable of multiple samplings, the end cover is detachably connected to the upper half ring and the lower half ring, and the contact part of the extrusion block with the inner sleeve is made of rubber material.

[0016] Advantages of the present invention: The present invention realizes that by inserting the outer sleeve into the packaging bag and keeping it stationary, there is no need for manual repeated pushing and pulling of the outer sleeve, which may cause friction to the break position of the packaging bag and prevent the break part from increasing. At the same time, the break part of the packaging bag is tightly sealed by the limiting part, avoiding some powder directly falling from the break part, resulting in waste of resources; By setting the extrusion block to a conical shape, the resistance between the extrusion block and the powder during the pushing process is reduced, ensuring the smoothness of the sampling process; By pulling the second connecting frame to the right, the second connecting frame slides on the first connecting frame, thereby extending the diameter of the feeding channel formed by the combination of the first connecting frame and the second connecting frame, so as to adapt to larger-sized sealing bags and improve the adaptability of the device; By spreading the lower part of the sealing bag mouth by the spreading plate and unfolding the fitting part, the opening when the powder drops is increased, ensuring the smooth dropping of the powder sample and preventing the powder from accumulating on the upper part of the sealing bag and blocking the channel opening; By scraping and wiping the inner wall of the inner sleeve with the edge of the extrusion block, the inner sleeve and the outer sleeve can be quickly cleaned without additional cleaning tools, further improving the convenience of the device. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the food detection sampling device capable of multiple samplings of the present invention; Figure 2 It is a combined cross-sectional view of the outer sleeve and the inner sleeve of the present invention; Figure 3 It is a three-dimensional structure schematic diagram of the extrusion block of the present invention; Figure 4 It is a three-dimensional structure schematic diagram of the limiting block of the present invention; Figure 5Schematic three-dimensional structure diagram of the lever and fixed rod combination of the present invention; Figure 6 Schematic three-dimensional structure diagram of the limit rod, lever and fixed rod combination of the present invention; Figure 7 Exploded view of the first connecting frame and the second connecting frame of the present invention.

[0018] Figure 8 Combined side view of the inner sleeve and the second connecting frame of the present invention; Figure 9 Exploded view of the outer sleeve, inner sleeve and extrusion block of the present invention; Figure 10 Schematic three-dimensional structure diagram of the arc-shaped block and the expansion plate combination of the present invention.

[0019] Reference numerals in the drawings: 1 - outer sleeve, 1001 - limit part, 2 - inner sleeve, 2001 - upper half ring, 2002 - lower half ring, 2003 - end cap, 2004 - filter cloth, 3 - extrusion block, 4 - limit block, 4001 - round rod, 101 - connecting rod, 102 - ring, 103 - limit rod, 104 - lever, 105 - fixed rod, 106 - first connecting frame, 107 - second connecting frame, 201 - arc-shaped block, 202 - expansion plate. Detailed implementation manners

[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] Embodiment 1 A food detection method includes the following steps: S1: Puncture for sampling. Hold the outer sleeve 1 and puncture it at an appropriate angle at a suitable position of the food packaging bag. Then, push and pull the extrusion block 3 left and right repeatedly to extrude the powder in the packaging bag into the inner sleeve 2; S2: Obtain the sample. When the sample powder reaches the required sampling amount, pull the extrusion block 3 and the limit block 4 to the right, so that the powder between the extrusion block 3 and the limit block 4 is driven to the material outlet of the inner sleeve 2 and finally falls into the sampling bag; S3: Sample processing. Transfer the sampling bag containing the sample to the dedicated sample processing area of the laboratory for testing.

[0022] A food detection sampling device that can sample multiple times, as Figures 1-9 shown, includes an outer sleeve 1 and an inner sleeve 2; the inner sleeve 2 is slidably connected inside the outer sleeve 1; a material outlet is provided on the right side of the inner sleeve 2; both the outer sleeve 1 and the inner sleeve 2 are made of transparent materials; It also includes a pressing block 3, a pulling component, a limiting block 4 and a clamping component; a pressing block 3 is slidably connected inside the inner sleeve 2; a pulling component is installed on the pressing block 3; a limiting block 4 is slidably connected inside the inner sleeve 2; an end cap 2003 is arranged on the right side of the inner sleeve 2; the limiting block 4 consists of a round block and a round rod 4001, the round rod 4001 penetrates through the end cap 2003, and a spring is fixedly connected between the round block of the limiting block 4 and the end cap 2003; scale lines are arranged on the outer wall of the inner sleeve 2; the round block of the limiting block 4 is located to the left of the material outlet of the inner sleeve 2, and the round block is located at the starting position of the scale line; a clamping component is installed on the inner sleeve 2.

[0023] An air groove is arranged on the inner sleeve 2, and a filter cloth 2004 is arranged on the air groove.

[0024] The pulling component includes a connecting rod 101 and a ring 102; two symmetrically arranged connecting rods 101 are fixedly connected to the pressing block 3; the inner sleeve 2 is jointly composed of an upper half ring 2001 and a lower half ring 2002; two symmetrically arranged chutes are formed after the upper half ring 2001 and the lower half ring 2002 are combined, and each connecting rod 101 slides on the adjacent chute; a ring 102 is fixedly connected between the two connecting rods 101.

[0025] The clamping component includes a limiting rod 103, a dial rod 104, a fixed rod 105, a first connecting frame 106 and a second connecting frame 107; a limiting rod 103 is fixedly connected to the lower side of the inner sleeve 2; two vertically distributed dial rods 104 are rotatably connected to the limiting rod 103 through torsion springs; a fixed rod 105 is fixedly connected to each dial rod 104, and all the fixed rods 105 are symmetrically arranged front and back; a first connecting frame 106 is fixedly connected to the material outlet of the inner sleeve 2; a second connecting frame 107 is slidably arranged on the right side of the inner sleeve 2; the first connecting frame 106 and the second connecting frame 107 jointly form a material outlet channel.

[0026] The first connecting frame 106 and the second connecting frame 107 are set to be in damping sliding connection, and the second connecting frame 107 can slide left and right between the first connecting frame 106 and the inner sleeve 2.

[0027] A rubber sleeve is arranged on the surface of each fixed rod 105 to improve the clamping force of the fixed rod 105 on the sealing bag and reduce the clamping damage caused by the fixed rod 105 to the sealing bag.

[0028] The pressing block 3 is set to be conical.

[0029] It also includes a bent arc block and an expanding plate; several bent arc blocks are rotatably connected to the first connecting frame through torsion springs; an expanding plate for expanding the sealing bag is fixedly connected to each bent arc block.

[0030] The end cap is set to be detachably connected to the upper half ring and the lower half ring, and the contact part between the pressing block and the inner sleeve is made of rubber material.

[0031] The working steps of this embodiment are as follows: In the prior art, when manually sampling and detecting the powder sample in the packaging bag, usually first put the sealed bag (i.e., the sampling bag) on the blanking part at the end of the sampling tube, then pierce the tip of the sampling tube into the packaging bag to form a break on the packaging bag surface that is the same size as the diameter of the sampling tube. Since the fluidity of some powders is poor, such as soybean milk powder and sesame powder, it is necessary to manually push and pull the sampling tube repeatedly to facilitate the powder sample to fall into the sealed bag through the sampling tube. However, the repeated friction of the sampling tube on the break part of the packaging bag will cause the break to increase, so that during the sampling process, some powders will directly fall from the break part, resulting in waste of resources. At the same time, it will also contaminate the operator's body, the working area, etc. with powders, affecting the working environment.

[0032] To ensure the normal progress of sampling and avoid the above situation, first, manually put the sealed bag on the blanking port of the inner sleeve 2, hold the bag mouth of the sealed bag with one hand, so that the bag mouth of the sealed bag always wraps the blanking port of the inner sleeve 2 to hold the powder sample. Then, hold the outer sleeve 1 with the other hand and insert the tip of the outer sleeve 1 into the packaging bag until the limiting part 1001 contacts the packaging bag. At this time, the tip of the outer sleeve 1 has pierced the packaging bag. Then, manually push the inner sleeve 2 to make the inner sleeve 2 move relative to the outer sleeve 1 into the interior of the packaging bag until the inner sleeve 2 drives the extrusion block 3 into the interior of the packaging bag. At the same time, by pushing the ring 102 to the left, drive the extrusion block 3 to move to the left until the extrusion block 3 disengages from the inner sleeve 2. At this time, the left side of the inner sleeve 2 is no longer blocked by the extrusion block 3, and the powder in the packaging bag will gradually enter the inner sleeve 2 through the tip of the outer sleeve 1. By repeatedly pulling the ring 102, make the ring 102 drive the extrusion block 3 to continuously enter and exit the inner sleeve 2, so that the powder in the packaging bag will be continuously pushed into the interior of the inner sleeve 2 as the extrusion block 3 moves left and right, thus realizing the sampling of the powder sample. At the same time, by setting the extrusion block 3 to a conical shape, the resistance to the powder during the process of pushing the extrusion block 3 is reduced, ensuring the smoothness of the sampling process. During the above process, after the outer sleeve 1 is inserted into the packaging bag, it remains stationary, so there is no need to manually push and pull the outer sleeve 1 repeatedly to cause friction to the break position of the packaging bag and prevent the break part from increasing. At the same time, the limiting part 1001 tightly blocks the break part of the packaging bag to avoid some powders directly falling from the break part during the sampling process, resulting in waste of resources.

[0033] Then, the powder sampling amount in the inner sleeve 2 is manually observed. When it reaches the required sampling amount, the ring 102 is pulled to the right to make the extrusion block 3 enter the inner sleeve 2 and maintain this state, and the left end of the inner sleeve 2 is blocked. At this time, the outer sleeve 1 can be manually pulled out from the packaging bag, and then the ring 102 is manually pulled to the right until the extrusion block 3 squeezes all the powder in the inner sleeve 2 to the right to the discharge port of the inner sleeve 2. At this time, the powder falls into the sealing bag through the discharge port of the inner sleeve 2. After all the powder enters the sealing bag, the sealing bag is removed from the inner sleeve 2 and sealed, thereby completing the sampling process.

[0034] Taking into account the irregular shape of soybean milk powder particles during sampling, in the natural stacking state, the particles cannot be closely arranged, and a large number of gaps of different sizes will be formed. When using a sampling tube for sampling, these gaps will make the actual amount of powder taken less, and due to the gaps between the particles, it is difficult to judge the actual sampling amount with the naked eye. In order to ensure that the sampling amount is sufficient and the detection is carried out smoothly, in the above sampling process, the ring 102 is manually pulled to the right to make the extrusion block 3 squeeze the powder in the inner sleeve 2, and at the same time, the powder in the inner sleeve 2 is blocked and limited by the limit block 4. In this way, the extrusion block 3 and the limit block 4 cooperate to make the powder sample located at the extrusion block 3 and the limit block 4 be compacted, and the scale line on the inner sleeve 2 is used to observe whether the sampling amount meets the sampling requirements. At the same time, under the extrusion action of the extrusion block 3, the gas inside the inner sleeve 2 will be discharged to the outside through the gas groove on the inner sleeve 2, and pass through the filter cloth 2 004 intercepts the powder sample, thereby enhancing the compaction effect of the extrusion block 3 on the powder sample. When the sampling requirement is met, repeat the above steps and continue to pull the extrusion block 3 to the right so that the extrusion block 3 can extrude the powder sample on the right together with the limit block 4. At this time, the spring between the round block of the limit block 4 and the end cover 2003 is compressed, and the right end of the round rod 4001 of the limit block 4 passes through the end cover 2003. The limit block 4 continues to move to the right as a whole until the round block of the limit block 4 is located to the right of the discharge port of the inner sleeve 2. At the same time, the powder will gradually fall into the sealed bag through the discharge port. For part of the powder remaining in the inner sleeve 2, the extrusion block 3 and the limit block 4 can be manually pulled to move left and right repeatedly to push the powder sample remaining in the inner sleeve 2 into the discharge port until there is no more powder remaining in the inner sleeve 2, and then push the extrusion block 3 and the limit block 4 to return to their initial positions, and then repeat the above steps to sample the powder in another packaging bag.

[0035] It is also considered that during the sampling process, in order to prevent the powder sample from falling outside, it is necessary to manually hold the sealing bag and the lower material outlet part of the sampling tube, press the bag mouth of the sealing bag tightly on the lower material outlet of the sampling tube, so that the sealing bag always wraps the lower material outlet part of the sampling tube. During the process of manually holding the sealing bag and the lower material outlet part of the sampling tube, as the powder sample in the bag increases, the overall mass of the sealing bag increases. To prevent the sealing bag from falling off, the holding posture is usually unconsciously adjusted, resulting in repeated squeezing of the bag mouth of the sealing bag by the hand, causing the sealing strip on the sealing bag to be distorted, affecting the sealing effect of the sealing bag, and causing external dust and microorganisms to enter the sealing bag through the gap of the bag mouth of the sealing bag, contaminating the sample. To solve the above problems, before sampling, manually press the two lever rods 104, so that the right ends of the two lever rods 104 approach each other, and then the two fixing rods 105 on the lever rod 104 rotate with the limiting rod 103 as the rotation center, making them move away from each other and no longer contacting the material discharging channel formed by the first connecting frame 106 and the second connecting frame 107, and the torsion spring is compressed. Then align the bag mouth of the sealing bag with the material discharging channel and lift it upward until the bag mouth of the sealing bag is above the lower side of the material discharging channel. At this time, the bag mouth of the sealing bag closely adheres to the outer side wall of the channel opening of the material discharging channel. Then manually release the lever rod 104, and the torsion spring's restoring elastic force makes the lever rod 104 drive the adjacent fixing rod 105 to rotate back to the initial position, and clamp and limit the bag mouth of the sealing bag that adheres to the outer side wall of the channel opening through the fixing rod 105. Thus, there is no need to manually hold the sealing bag, avoiding squeezing the bag mouth of the sealing bag, reducing damage to the sealing bag, and at the same time improving the use convenience of the device.

[0036] Furthermore, according to the sampling requirements of different samples, there are also differences in the sampling amounts. Therefore, sealing bags of different sizes are needed to meet different sampling amounts. To improve the adaptability of the device, the user can pull the second connecting frame 107 to the right, so that the second connecting frame 107 slides on the first connecting frame 106, thereby increasing the diameter of the material discharging channel formed by the combination of the first connecting frame 106 and the second connecting frame 107, so as to adapt to larger-sized sealing bags and improve the adaptability of the device.

[0037] Embodiment 2 On the basis of Embodiment 1, as Figure 1 、 Figure 2 and Figure 10 shown, it further includes a curved arc block 201 and an expanding support plate 202; two symmetrically arranged curved arc blocks 201 are rotatably connected to the first connecting frame 106 through torsion springs; an expanding support plate 202 is fixedly connected to each curved arc block 201.

[0038] The end cover 2003 is detachably connected to the upper half ring 2001 and the lower half ring 2002, and the contact part between the extrusion block 3 and the inner sleeve 2 is made of rubber material.

[0039] The working process of this embodiment is as follows: When the sealing bag is sleeved at the blanking channel formed by the combination of the first connecting frame 106 and the second connecting frame 107, since the sealing bag is in a flat state in its initial state, even if the bag mouth of the sealing bag is opened, there is still a phenomenon that the lower part of the sealing bag fits together, resulting in the powder not sliding smoothly, causing the powder to accumulate on the upper part of the sealing bag and blocking the channel opening. To solve the above situation, when the bag mouth of the sealing bag is sleeved on the outer side wall of the blanking channel, the arc-shaped block 201 and the expansion plate 202 will pass through the bag mouth of the sealing bag and be located inside the sealing bag. Then, the operator loosens the lever 104. At this time, the fixed rod 105 will be driven by the lever 104 to clamp and fix the lower part of the bag mouth of the sealing bag, and press the adjacent arc-shaped block 201. After being squeezed, the arc-shaped block 201 rotates and gradually fits on the side wall of the first connecting frame 106, and drives the expansion plate 202 to rotate, so that the expansion plate 202 rotates towards the side close to the fixed rod 105. Taking the view from left to right as a reference, at this time, the two expansion plates 202 are in a V-shape as Figure 10 shown, so that the expansion plate 202 expands the lower part of the bag mouth of the sealing bag, unfolds the fitting part, thereby increasing the opening when the powder drops, ensuring the smooth dropping of the powder sample, and preventing the powder from accumulating on the upper part of the sealing bag and blocking the channel opening.

[0040] After sampling, in order not to affect subsequent sampling and avoid cross-infection, the sampling device needs to be cleaned. At this time, the operator only needs to turn the outer sleeve 1, the inner sleeve 2 and the extrusion block 3 downward together, and immerse the front left end of them in water. Then, the operator can repeatedly push and pull the extrusion block 3, so that the extrusion block 3 slides inside the inner sleeve 2 and continuously enters and exits the inner sleeve 2, driving the water to enter the inner sleeve 2. Since the contact part between the extrusion block 3 and the inner sleeve 2 is made of rubber material, during the pushing and pulling process of the extrusion block 3, the water flow is driven to clean the inside of the inner sleeve 2. At the same time, the edge of the extrusion block 3 can also scrape and wipe the inner wall of the inner sleeve 2. Then, the outer sleeve 1 is rinsed. Thus, without additional cleaning tools, the inner sleeve 2 and the outer sleeve 1 can be quickly cleaned, further improving the convenience of the device.

[0041] Furthermore, considering that some powders have high viscosity after contacting water, to improve the cleaning effect of the device, the inner sleeve 2 can also be directly pulled to the right to separate it from the outer sleeve 1. Then, the end cover 2003 of the inner sleeve 2 is removed, and the upper half ring 2001 and the lower half ring 2002 are separated. Special cleaning agents are used to clean the difficult-to-clean positions inside the upper half ring 2001, the lower half ring 2002, the end cover 2003, the filter cloth 2004 of the inner sleeve 2, as well as the first connecting frame 106 and the second connecting frame 107, so as to ensure the cleaning effect of the device.

[0042] It should be understood that the above description is for illustrative purposes only and is not intended to limit the present invention. Those skilled in the art will understand that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A food testing method, characterized in that: The following steps are involved: S1: Piercing sampling: hold the outer sleeve (1) and pierce the food packaging bag at a suitable angle, then push and pull the extrusion block (3) left and right repeatedly to squeeze the powder in the packaging bag into the inner sleeve (2); S2: Obtain the sample. When the sample powder reaches the required sampling amount, pull the extrusion block (3) and the limit block (4) to the right, so that the powder between the extrusion block (3) and the limit block (4) is driven to the discharge port of the inner sleeve (2) and finally falls into the sampling bag; S3: Sample processing: transfer the sampling bag containing the sample to the laboratory's dedicated sample processing area for testing.

2. A food testing sampling device capable of multiple sampling, the device is used for the sampling operations S1 and S2 in the food testing method according to claim 1, comprising an outer sleeve (1) and an inner sleeve (2); the inner sleeve (2) is slidably connected inside the outer sleeve (1); a feeding port is provided on the right side of the inner sleeve (2); the outer sleeve (1) and the inner sleeve (2) are both made of transparent material; the characteristics are: The invention also comprises an extrusion block (3), a pull-out assembly, a stopper block (4) and a clamping assembly; the inner sleeve (2) is slidably connected with the extrusion block (3) for preventing powder blockage; the extrusion block (3) is mounted with a pull-out assembly for driving the extrusion block (3) to slide on the inner sleeve (2); the inner sleeve (2) is slidably connected with the stopper block (4) for facilitating manual quantitative sampling; an end cover (2003) is arranged on the right side of the inner sleeve (2); the stopper block (4) is composed of a round block and a round rod (4001), the round rod (4001) passes through the end cover (2003), and a spring is fixedly connected between the round block of the stopper block (4) and the end cover (2003); scale lines are arranged on the outer wall of the inner sleeve (2); the round block of the stopper block (4) is located to the left of the feeding port of the inner sleeve (2), and the round block is located at the starting position of the scale lines; and the inner sleeve (2) is mounted with a clamping assembly for clamping a sealing bag.

3. A food detection sampling device capable of multiple sampling according to claim 2, characterized in that: An air groove is provided on the inner sleeve (2), and a filter cloth (2004) for intercepting powder is provided on the air groove.

4. The food detection sampling device capable of multiple sampling according to claim 2 is characterized in that: The pull-out assembly comprises a connecting rod (101) and a circular ring (102); a plurality of connecting rods (101) are fixedly connected to the extrusion block (3); the inner sleeve (2) is composed of an upper half ring (2001) and a lower half ring (2002); the upper half ring (2001) and the lower half ring (2002) are combined to form a plurality of slide grooves, and each connecting rod (101) slides on an adjacent slide groove; a circular ring (102) is fixedly connected between two connecting rods (101).

5. The food detection sampling device capable of multiple sampling according to claim 2, characterized in that: The clamping assembly comprises a limit rod (103), a shift rod (104), a fixed rod (105), a first connection frame (106) and a second connection frame (107); the limit rod (103) is fixedly connected to the lower side of the inner sleeve (2); a plurality of shift rods (104) are rotatably connected to the limit rod (103) via a torsion spring; each shift rod (104) is fixedly connected to a fixed rod (105), and all the fixed rods (105) are symmetrically arranged front to back; the first connection frame (106) is fixedly connected to the discharge port of the inner sleeve (2); the second connection frame (107) is slidably arranged on the right side of the inner sleeve (2); the first connection frame (106) and the second connection frame (107) are combined to form a discharge channel.

6. A food detection sampling device capable of multiple sampling according to claim 5, characterized in that: The first connection frame (106) and the second connection frame (107) are arranged to be connected in a damping sliding manner, and the second connection frame (107) can slide left and right between the first connection frame (106) and the inner sleeve (2).

7. The food detection sampling device capable of multiple sampling according to claim 5, characterized in that: A rubber sleeve is provided on the surface of each fixing rod (105).

8. The food detection sampling device capable of multiple sampling according to claim 2, characterized in that: The extrusion block (3) is configured to be conical.

9. The food detection sampling device capable of multiple sampling according to claim 6, characterized in that: It also comprises a bending block (201) and an expansion plate (202); a plurality of bending blocks (201) are rotatably connected to the first connection frame (106) via a torsion spring; and an expansion plate (202) for expanding the sealing bag is fixedly connected to each bending block (201).

10. The food detection sampling device capable of multiple sampling according to claim 4, characterized in that: The end cover (2003) is detachably connected to the upper half ring (2001) and the lower half ring (2002), and the contact portion of the extrusion block (3) with the inner sleeve (2) is made of rubber material.

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