Quantitative sampling device for food pesticide residue detection

Abstract

The utility model discloses a quantitative sampling device for food pesticide residue detection, which comprises a sampling barrel, a piston and a piston rod, scale marks are arranged on the sampling barrel, the piston is arranged inside the sampling barrel, a first end of the piston rod is fixedly connected with the piston, the quantitative sampling device further comprises a sleeve and a positioning piece, and the positioning piece is fixedly connected with the sleeve. The first end of the sleeve is arranged on the sampling barrel in a sleeving mode and detachably connected with the sampling barrel, the positioning piece is fixedly installed at the second end of the sleeve, a limiting piece is fixedly installed on the piston rod, the outer side face of the limiting piece makes contact with the inner side face of the positioning piece, the second end of the piston rod penetrates through the positioning piece, and the piston rod is fixedly installed at the second end of the sleeve. And the sleeve is arranged outside the sleeve. According to the utility model, the sleeve, the positioning sheet and the limiting sheet are arranged, so that the accurate volume can be ensured in each sampling, and the accuracy and the reliability of detection are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pesticide residue detection sampling, and particularly relates to a food pesticide residue detection quantitative sampling device. BACKGROUND

[0002] Pesticide residue refers to the derivatives, metabolites, pesticide parent, degradation and impurities of pesticides remaining in the environment, organisms and food after the use of pesticides. The main pesticides causing pesticide residue exceeding the standard are organophosphorus pesticides and carbamate pesticides, such as parathion, methamidophos, phorate, omethoate, methyl parathion, etc. The food with excessive pesticide residue is very harmful to human body, and can easily cause acute poisoning and even death.

[0003] In the pesticide residue detection process, the food to be detected is prepared into a test solution, and then the test solution is quantitatively extracted for detection with other chemical reagents. The existing pesticide residue detection quantitative sampler is generally a needle cylinder with a scale, and the amount of sampling cannot be conveniently controlled, which can easily cause insufficient sampling or excessive sampling, and the sampling needs to be rechecked, thereby affecting the detection efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a food pesticide residue detection quantitative sampling device to solve the problems mentioned in the background.

[0005] To solve the above technical problems, the utility model provides a food pesticide residue detection quantitative sampling device, which comprises a sampling cylinder, a piston and a piston rod, the sampling cylinder is provided with a scale line, the piston is arranged in the sampling cylinder, the first end of the piston rod is fixedly connected with the piston, and the utility model further comprises a sleeve and a positioning sheet, the first end of the sleeve is sleeved on the sampling cylinder and detachably connected with the sampling cylinder, the positioning sheet is fixedly installed at the second end of the sleeve, a limiting sheet is fixedly installed on the piston rod, the outer side surface of the limiting sheet is in contact with the inner side surface of the positioning sheet, the second end of the piston rod penetrates through the positioning sheet and is located outside the sleeve.

[0006] Further, the first end of the sleeve is provided with a U-shaped groove penetrating in the longitudinal direction

[0007] Further, the sleeve outer wall is fixedly installed with a wedge-shaped part, the sampling cylinder is fixedly installed with an L-shaped limiting part, the L-shaped limiting part is adapted to the U-shaped groove, and the inner wall of the L-shaped limiting part is clamped with the wedge-shaped part.

[0008] Further, a non-slip pad is arranged between the L-shaped limiting part and the wedge-shaped part, and the non-slip pad is connected with the L-shaped limiting part.

[0009] Further, the second end of the piston rod is threadedly connected with a limiting block.

[0010] Further, two sides of the sleeve are respectively provided with handles.

[0011] The utility model discloses the beneficial effect is: the utility model discloses through setting sleeve, positioning sheet and limit piece, can ensure that every time sampling reaches the accurate volume, has improved the accuracy and reliability of detection. The whole sampling process is simple and direct, does not need complicated operation step and professional skill, can complete the quantitative sampling work of sample quickly. Meanwhile, the device structure is simple, and the manufacturing cost is relatively lower, and easily maintains and maintains, reduces the detection cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the three-dimensional structure schematic diagram of the utility model embodiment.

[0013] Figure 2 It is Figure 1 It is the enlarged structure schematic diagram of A department.

[0014] Figure 3 It is the longitudinal section structure schematic diagram of the utility model embodiment.

[0015] Figure 4 It is the transverse section structure schematic diagram of the utility model embodiment.

[0016] 1, sampling cylinder, 2, piston, 3, piston rod, 4, sleeve, 5, positioning sheet, 6, limit piece, 7, U-shaped groove, 8, wedge, 9, L-shaped limit piece, 10, non-slip pad, 11, limit block, 12, handle. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only one embodiment of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0018] In order to make the purpose, technical scheme and advantage of the present application more clear, the present application is further described in detail in combination with the drawings and specific embodiments.

[0019] In the following description, reference has been made to "one embodiment," "an embodiment," "one example," "an example," etc. which means that a particular feature, structure, characteristic, property, element or limitation described in connection with the embodiment or example can be included in at least one embodiment or example of the disclosure, but is not necessarily included in all embodiments or examples. Further, it is noted that the phraseology "according to an embodiment of the present application" does not necessarily refer to the same embodiment or example although it can.

[0020] As shown in the utility model discloses a kind of food agricultural residual detection quantitative sampling device, it includes sampling cylinder 1, piston 2 and piston rod 3, sampling cylinder 1 is equipped with scale line, piston 2 is arranged in the inside of sampling cylinder 1, the first end of piston rod 3 is fixedly connected with piston 2, i.e. Figures 1-4 Sampling cylinder 1 is divided into conical end and cylindrical end, conical end is used for sampling to be measured liquid, piston 2 is slidably installed in the inside of cylindrical end of sampling cylinder 1, the second end of piston rod 3 is fixedly connected with piston 2.The device further includes sleeve 4 and positioning sheet 5, the first end of sleeve 4 is sleeved on sampling cylinder 1, and is detachably connected with sampling cylinder 1, positioning sheet 5 is fixedly installed at the second end of sleeve 4, limiting sheet 6 is fixedly installed on piston rod 3, the outside surface of limiting sheet 6 is in contact with the inside surface of positioning sheet 5, the second end of piston rod 3 passes through positioning sheet 5 and is located at the outside of sleeve 4.I.e.

[0021] In initial state, the device is placed vertically, i.e.

[0022] The first end face of sleeve 4 is flush with the scale of required amount of to-be-measured liquid, then sleeve 4 is connected (by the way of clamping or threaded connection) with sampling cylinder 1 together, i.e.

[0023] In one embodiment, the first end of the sleeve 4 is provided with a U-shaped slot 7 extending longitudinally, and the operator can visually determine the moving position of the sleeve 4 through the U-shaped slot 7, without the need to frequently check the scale line, thereby improving the sampling efficiency.

[0024] In one embodiment, the outer wall of the sleeve 4 is fixedly provided with a wedge-shaped part 8, and the sampling cylinder body 1 is fixedly provided with an L-shaped limiting part 9, the L-shaped limiting part 9 is adapted to the limiting slot, and the inner wall of the L-shaped limiting part 9 is clamped with the wedge-shaped part 8. That is, after the sleeve 4 is slid upward or downward to a specified position, the sleeve 4 is rotated, so that the wedge-shaped part 8 is gradually clamped between the L-shaped limiting part 9 and the outer wall of the sleeve 4, and the sleeve 4 is tightly connected with the L-shaped limiting part 9. This connection mode is simple and reliable, and can effectively prevent the relative movement of the sampling cylinder body 1 in the sleeve 4.

[0025] In one embodiment, a non-slip pad 10 is arranged between the L-shaped limiting part 9 and the wedge-shaped part 8, and the non-slip pad 10 is connected with the L-shaped limiting part 9, thereby enhancing the friction between the L-shaped limiting part 9 and the wedge-shaped part 8, and further preventing the relative sliding. At the same time, the impact or friction between the L-shaped limiting part 9 and the wedge-shaped part 8 during the process of inserting or taking out the sampling cylinder body 1 from the sleeve 4 is reduced, thereby prolonging the service life of the device.

[0026] In one embodiment, the second end of the piston rod 3 is threadedly connected with a limiting block 11, so as to facilitate the installation or dismounting of the sleeve 4.

[0027] In one embodiment, handles 12 are respectively arranged on the two sides of the sleeve 4, so as to facilitate the operation of the staff.

[0028] The working process of the embodiment of the utility model is as follows:

[0029] First, the U-shaped slot 7 on the sleeve 4 is aligned with the L-shaped limiting part 9, the sampling cylinder body 1 is inserted into the sleeve 4, and then the limiting block 11 is screwed onto the piston rod 3, and the installation of the device is completed. In the initial state, the device is vertically placed, that is, the sampling cylinder body 1 is in a vertical state, the piston 2 is located at the bottom of the cylindrical end of the sampling cylinder body 1 and is attached to the conical end, the end face of the first end of the sleeve 4 corresponds to the 0 scale line, and the limiting sheet 6 is in contact with the positioning sheet 5.

[0030] In use, the sleeve 4 is moved upward, the end face of the first end of the sleeve 4 is observed through the U-shaped slot 7 to be flush with the scale of the required amount of the to-be-measured liquid, and then the sleeve 4 is rotated, so that the wedge-shaped part 8 is gradually clamped between the L-shaped limiting part 9 and the outer wall of the sleeve 4, the non-slip pad 10 is tightly attached to the wedge-shaped part 8, and the sleeve 4 is tightly connected with the L-shaped limiting part 9. When the to-be-measured liquid is sucked, the conical end of the sampling cylinder body 1 is placed in the to-be-measured liquid, and the piston rod 3 is pulled upward to drive the piston 2 to move upward. With the upward movement of the piston 2, the amount of liquid in the sampling cylinder body 1 gradually increases, until the limiting sheet 6 is in contact with the positioning sheet 5 again, indicating that the preset sampling amount has been reached.

[0031] The utility model discloses a sleeve 4, positioning piece 5 and spacing piece 6 can ensure that the accurate volume is reached every time sampling, and the accuracy and reliability of detection are improved. The whole sampling process is simple and direct, and the quantitative sampling work of sample can be quickly completed without complex operation steps and professional skill. Meanwhile, the device is simple in structure, and the manufacturing cost is relatively lower, and is easy to maintain and maintain, and reduces the detection cost.

[0032] The above description of the disclosed embodiments is to enable a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quantitative sampling device for detecting pesticide residues in food, comprising a sampling cylinder, a piston, and a piston rod, wherein the sampling cylinder is provided with graduation lines, the piston is disposed inside the sampling cylinder, and the first end of the piston rod is fixedly connected to the piston, characterized in that: It also includes a sleeve and a positioning plate. The first end of the sleeve is sleeved on the sampling cylinder and is detachably connected to the sampling cylinder. The positioning plate is fixedly installed on the second end of the sleeve. A limiting plate is fixedly installed on the piston rod. The outer side of the limiting plate contacts the inner side of the positioning plate. The second end of the piston rod passes through the positioning plate and is located outside the sleeve.

2. The quantitative sampling device for detecting pesticide residues in food according to claim 1, characterized in that: The first end of the sleeve has a U-shaped groove running longitudinally through it.

3. The quantitative sampling device for detecting pesticide residues in food according to claim 2, characterized in that: A wedge-shaped component is fixedly installed on the outer wall of the sleeve, and an L-shaped limiting component is fixedly installed on the sampling cylinder. The L-shaped limiting component is adapted to the U-shaped groove, and the inner wall of the L-shaped limiting component is engaged with the wedge-shaped component.

4. The quantitative sampling device for detecting pesticide residues in food according to claim 3, characterized in that: An anti-slip pad is provided between the L-shaped limiting member and the wedge-shaped member, and the anti-slip pad is connected to the L-shaped limiting member.

5. The quantitative sampling device for detecting pesticide residues in food according to claim 1, characterized in that: The second end of the piston rod is threadedly connected to a limit block.

6. The quantitative sampling device for detecting pesticide residues in food according to claim 1, characterized in that: Handles are installed on both sides of the sleeve.

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