Sampling device for pretreatment of cosmetics by microwave digestion method

Abstract

The utility model discloses a sampling device for pretreatment of cosmetics by a microwave digestion method, which relates to the field of trace sample transfer and comprises a sampling mechanism arranged at the top of a digestion tube; the sampling mechanism comprises a cover plate, a plurality of positioning assemblies distributed in an annular array are arranged on the cover plate, and the positioning assemblies are attached to the inner wall of the upper end of the digestion tube; a sampling assembly is arranged in the middle of the cover plate. According to the utility model, the cover plate is arranged on the sampling mechanism, the plurality of positioning components are arranged on the cover plate, the L-shaped plates on the positioning components can be automatically ejected out after extending into the digestion tube under the action of the springs, and the plurality of L-shaped plates are matched to play a positioning role, so that the sampling tube on the cover plate is kept at the central position of the digestion tube; meanwhile, the plurality of L-shaped plates can be matched with the digestion tubes with different tube diameters under the action of the springs, so that the working range of the device is widened.

Description

Technical Field

[0001] This utility model belongs to the field of micro-sample transfer technology, specifically, it relates to a sampling device for pretreatment of cosmetics using microwave digestion method. Background Technology

[0002] As living standards improve, the usage rate of cosmetics is also increasing.

[0003] Heavy metals are a routine test item in cosmetics, and microwave digestion is commonly used for sample pretreatment. This method requires placing the sample at the bottom of the microwave digestion tube after weighing it. However, due to the long and thin digestion tube, weighing and placing the sample is inconvenient, and the sample easily adheres to the inner wall of the tube. During digestion, uneven pressure can easily cause the tube to burst, affecting experimental results and resulting in economic losses.

[0004] While existing cosmetic sampling devices include those capable of accurately delivering samples to the bottom of test tubes, they generally suffer from complex structures and high costs. Some even require the assistance of motors or hydraulic systems, making them impractical for routine cosmetic testing, especially for remote sampling.

[0005] The utility model with publication number CN212646171U discloses a sampling device for pretreatment of cosmetics by microwave digestion, including a digestion tube for cosmetic testing and a sampling spoon installed at the lower end of a sampling rod. A guide ring is fixedly installed on the sampling rod, and the guide ring is coaxially arranged with the sampling rod and the outer diameter is smaller than the inner diameter of the digestion tube.

[0006] As shown in the above utility model, existing sampling devices generally use a guide ring on the outside of the sampling rod to prevent the sampling spoon from contacting the inner wall of the digestion tube. Although this method can prevent the sampling spoon from contacting the wall of the digestion tube to a certain extent, it can only be used with digestion tubes of one diameter. In addition, adding multiple guide rings to the sampling rod makes it inconvenient to insert into the digestion tube during sampling and inconvenient to move after sampling. In view of this, the present utility model is proposed. Utility Model Content

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0008] A sampling device for pretreatment of cosmetics using microwave digestion method includes:

[0009] A sampling mechanism is disposed at the top of the digestion tube;

[0010] The sampling mechanism includes a cover plate, on which a plurality of positioning components are arranged in a circular array, and the positioning components are in contact with the upper inner wall of the digestion tube;

[0011] A sampling component is provided in the middle of the cover plate for sampling the sample in the digestion tube.

[0012] Preferably, the lower surface of the cover plate is provided with a plurality of limiting grooves arranged in a ring array, the bottom of the limiting grooves is provided with linear slots, and the opening of the linear slots extends to the upper surface of the cover plate.

[0013] Preferably, the cover plate has a through hole in the middle, a guide sleeve is fixed in the middle of the lower surface of the cover plate, and an extension sleeve is fixed in the middle of the upper surface of the cover plate. Both the guide sleeve and the extension sleeve are connected to the through hole, and a limit knob is connected to one side of the extension sleeve through a screw hole.

[0014] Preferably, the positioning component includes a plurality of L-shaped plates arranged in a ring array on the lower surface of the cover plate, and a plurality of rubber strips arranged vertically at equal intervals are bonded to one side of the L-shaped plates, the rubber strips being in contact with the upper inner wall of the digestion tube.

[0015] Preferably, a limiting slider is fixed to the top of the L-shaped plate, the limiting slider is located in the limiting groove, one end of the limiting slider is connected to the inner wall of one end of the limiting groove by a spring, and an extension rod is fixed to the top of the limiting slider, the extension rod is connected through the linear slot.

[0016] Preferably, the sampling assembly includes a sampling rod, the lower end of which passes through the extension sleeve, the through hole on the cover plate and the guide sleeve in sequence and extends into the digestion tube, and a baffle is fixed on the outer side of the lower end of the sampling rod, the baffle being located below the guide sleeve, and a sampling spoon is fixed on the bottom end of the sampling rod.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention features a cover plate on the sampling mechanism, with multiple positioning components on the cover plate. The L-shaped plates on the positioning components automatically pop out after being inserted into the digestion tube under the action of springs. The multiple L-shaped plates work together to position the sampling tube on the cover plate, keeping it in the center of the digestion tube. This facilitates the sampling rod to move the sample into the digestion tube. At the same time, the multiple L-shaped plates can adapt to digestion tubes of different diameters under the action of springs, thus improving the working range of this device.

[0019] This invention improves the sampling efficiency of the device by providing a guide sleeve and an extension sleeve on the cover plate, which allows the sampling rod to move vertically. At the same time, the sampling rod is designed to be separated from the cover plate, so that the sampling rod can be sampled by a sampling spoon after separation from the cover plate, and then inserted into the cover plate after sampling. The extension rod on the L-shaped plate can drive the L-shaped plate to move, so that the device can be quickly and easily inserted into digestion tubes of different diameters.

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the sampling mechanism of this utility model;

[0024] Figure 3 This is a bottom view of the cover plate structure of this utility model.

[0025] Figure 4 This is a top view of the cover plate structure of this utility model.

[0026] Figure 5 This is a schematic diagram of the positioning component structure of this utility model.

[0027] Figure 6 This is a schematic diagram of the sampling component structure of this utility model.

[0028] In the figure: sampling mechanism 1, cover plate 2, limiting slide 21, linear slot 22, guide sleeve 23, extension sleeve 24, limiting knob 25, positioning component 3, L-shaped plate 31, rubber strip 32, limiting slider 33, spring 34, extension rod 35, sampling component 4, sampling rod 41, baffle 42, sampling spoon 43. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0030] like Figures 1 to 6 As shown, a sampling device for pretreatment of cosmetics using microwave digestion includes a sampling mechanism 1, which is disposed at the top of the digestion tube.

[0031] Specifically, the sampling mechanism 1 includes a cover plate 2. The lower surface of the cover plate 2 is provided with multiple limiting grooves 21 arranged in a circular array. The bottom of the limiting grooves 21 is provided with linear slots 22. The opening of the linear slots 22 extends to the upper surface of the cover plate 2. A through hole is provided in the middle of the cover plate 2. A guide sleeve 23 is fixed in the middle of the lower surface of the cover plate 2. An extension sleeve 24 is fixed in the middle of the upper surface of the cover plate 2. Both the guide sleeve 23 and the extension sleeve 24 are connected to the through hole. The guide sleeve 23 and the extension sleeve 24 cooperate to play a guiding role. One side of the extension sleeve 24 is connected to a limiting knob 25 through a screw hole. The limiting knob 25 cooperates with the screw hole to limit the sampling rod 41 on the sampling assembly 4.

[0032] Specifically, the cover plate 2 is provided with multiple positioning components 3 arranged in a circular array. The positioning components 3 are in contact with the upper inner wall of the digestion tube. The positioning components 3 include multiple L-shaped plates 31 arranged in a circular array on the lower surface of the cover plate 2. The L-shaped plates 31 are designed with an arc-shaped structure to fit the arc-shaped wall of the digestion tube. Multiple rubber strips 32 are bonded to one side of the L-shaped plates 31 and are arranged vertically at equal intervals. The rubber strips 32 are in contact with the upper inner wall of the digestion tube. The rubber strips 32 can prevent the L-shaped plates 31 from damaging the digestion tube when they pop out. At the same time, it also serves as a damping limit. The top of the L-shaped plate 31 is fixed with a limit slider 33, which is located in the limit groove 21 and serves as a guide, so that the L-shaped plate 31 maintains linear movement. One end of the limit slider 33 is connected to the inner wall of one end of the limit groove 21 through a spring 34. The spring 34 allows the L-shaped plate 31 to pop out automatically when no force is applied. The top of the limit slider 33 is fixed with an extension rod 35, which is connected through the linear slot 22. The extension rod 35 facilitates the movement of the L-shaped plate 31.

[0033] More specifically, a sampling component 4 is provided in the middle of the cover plate 2 for sampling the sample in the digestion tube. The sampling component 4 includes a sampling rod 41. The lower end of the sampling rod 41 passes through the extension sleeve 24, the through hole on the cover plate 2 and the guide sleeve 23 in sequence and extends into the digestion tube. A baffle 42 is fixed on the outer side of the lower end of the sampling rod 41. The baffle 42 is located below the guide sleeve 23. The baffle 42 limits the sampling rod 41 and prevents the sampling rod 41 from moving excessively upward after sampling, which would cause the sampling spoon 43 to contact the guide sleeve 23. The sampling spoon 43 is fixed at the bottom of the sampling rod 41. The sampling rod 41 samples the sample through the sampling spoon 43 and then sends it into the digestion tube.

[0034] When this device is in operation, it first takes samples from different cosmetic packages using the sampling spoon 43 on the sampling rod 41. After sampling, if the cover plate 2 interferes with the sampling of the sampling rod 41, the sampling rod 41 is separated from the cover plate 2; otherwise, it is not separated. After separation, the sampling rod 41 is reconnected to the cover plate 2 after sampling is completed. Then, the extension rod 35 moves the L-shaped plates 31, moving multiple L-shaped plates 31 towards the center of the cover plate 2. Next, the cover plate 2 is placed on the corresponding digestion tube, and multiple L-shaped plates 31 are moved into the digestion tube. At this time, the extension rod 35 is released, and the L-shaped plates 31 are reset under the action of the spring 34 until the rubber strip 32 on the L-shaped plates 31 contacts the inner wall of the digestion tube. Multiple L-shaped plates 31, together with the spring 34, play a positioning role, adjusting the sampling rod 41 in the middle of the cover plate 2 to the center of the digestion tube. Then, the limit is turned... Use the position knob 25 to separate the limit knob 25 from the sampling rod 41, releasing the limit of the sampling rod 41. Then move the sampling rod 41 downwards until the sampling spoon 43 at the bottom of the sampling rod 41 moves to the bottom of the digestion tube. Then slightly tilt the digestion tube and place the sample on the sampling spoon 43 at the bottom of the digestion tube. After that, move the sampling rod 41 upwards until the baffle 42 on the sampling rod 41 contacts the guide sleeve 23. Then turn the limit knob 25 to limit the sampling rod 41. Then, by bringing your hands together, drive the extension rod 35 to move. The extension rod 35 drives the L-shaped plate 31 to move, separating the L-shaped plate 31 from the digestion tube. At this time, the cover plate 2 can be separated from the digestion tube. Then release the limit of the sampling rod 41 by using the limit knob 25 and move the sampling rod 41 downwards until the sampling rod 41 separates from the cover plate 2. At this time, the sampling rod 41 and the sampling spoon 43 can be transported separately.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sampling device for pretreatment of cosmetics using microwave digestion, characterized in that, include: A sampling mechanism is disposed at the top of the digestion tube; The sampling mechanism includes a cover plate, on which a plurality of positioning components are arranged in a circular array, and the positioning components are in contact with the upper inner wall of the digestion tube; A sampling component is provided in the middle of the cover plate for sampling the sample in the digestion tube.

2. The sampling device for pretreatment of cosmetics using microwave digestion method according to claim 1, characterized in that, The lower surface of the cover plate is provided with a plurality of limiting grooves arranged in a ring array. The bottom of the limiting groove is provided with a linear empty groove, and the opening of the linear empty groove extends to the upper surface of the cover plate.

3. The sampling device for pretreatment of cosmetics using microwave digestion method according to claim 1, characterized in that, The cover plate has a through hole in the middle, a guide sleeve is fixed in the middle of the lower surface of the cover plate, and an extension sleeve is fixed in the middle of the upper surface of the cover plate. Both the guide sleeve and the extension sleeve are connected to the through hole, and a limit knob is connected to one side of the extension sleeve through a screw hole.

4. The sampling device for pretreatment of cosmetics using microwave digestion according to claim 1, characterized in that, The positioning component includes multiple L-shaped plates arranged in a ring array on the lower surface of the cover plate. Multiple rubber strips arranged vertically at equal intervals are bonded to one side of each L-shaped plate. The rubber strips are in contact with the upper inner wall of the digestion tube.

5. A sampling device for pretreatment of cosmetics using microwave digestion according to claim 1, characterized in that, The top of the L-shaped plate is fixed with a limiting slider, which is located in the limiting groove. One end of the limiting slider is connected to the inner wall of one end of the limiting groove by a spring. An extension rod is fixed to the top of the limiting slider, and the extension rod is connected through the linear slot.

6. The sampling device for pretreatment of cosmetics using microwave digestion according to claim 1, characterized in that, The sampling assembly includes a sampling rod, the lower end of which passes through the extension sleeve, the through hole on the cover plate and the guide sleeve in sequence and extends into the digestion tube. A baffle is fixed to the outer side of the lower end of the sampling rod, the baffle is located below the guide sleeve, and a sampling spoon is fixed to the bottom end of the sampling rod.

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