CN111947983B - Spiral sampling device for liquid food detection - Google Patents
Spiral sampling device for liquid food detection Download PDFInfo
- Publication number
- CN111947983B CN111947983B CN202010705438.5A CN202010705438A CN111947983B CN 111947983 B CN111947983 B CN 111947983B CN 202010705438 A CN202010705438 A CN 202010705438A CN 111947983 B CN111947983 B CN 111947983B
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- pipeline
- liquid food
- air pressure
- disc
- accommodating box
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- 235000021056 liquid food Nutrition 0.000 title claims abstract description 51
- 238000005070 sampling Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims description 39
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 9
- 235000013305 food Nutrition 0.000 description 7
- 230000004308 accommodation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a spiral sampling device for liquid food detection, which is used for sampling liquid food detection and comprises the following components: the utility model provides a vertical pipeline, a plurality of first holding case, a plurality of disc and a plurality of connecting tube, first holding case arranges from top to bottom in vertical pipeline, first holding case is cylindric, the disc sets up in the bottom of first holding case, the disc passes through connecting tube with first holding case and is connected, connecting tube connects the position that first holds the case and sets up first switch door, the axis of first holding case, the axis of vertical pipeline and the axis of disc coincide each other, the disc includes the shell, double helix lateral wall and a plurality of filter screen, the shell constitutes helical channel with double helix lateral wall, the filter screen sets up in helical channel, the mesh of the filter screen that is close the helical channel center more is littleer, the shell sets up two first openings, first opening is according to the centre of a circle centrosymmetric of disc, vertical pipeline sets up the second opening, first opening links up with the second opening.
Description
Technical Field
The invention relates to the field of food detection, in particular to a spiral sampling device for liquid food detection.
Background
In industries closely related to daily life of people, food safety is the most concerned by masses, whether the food safety is directly related to the self health of people or even life safety, in order to ensure the food safety, the national food safety supervision department can irregularly sample and detect food circulated in the market, for liquid foods, the sampling process is particularly important, a lot of liquid foods are not necessarily uniform liquid at present, a lot of liquid foods are in a turbid state and are layered when stationary, the current liquid sampler can only extract samples for uniform liquid, and can not comprehensively detect the content of components of liquid aiming at liquid which is not uniform, or can extract samples of different layers by manually moving the sampler up and down or manually mixing the samples before extracting the samples, so that the time and the labor are wasted, and the operation is inconvenient; meanwhile, when the layered sampling is carried out, the liquid on a part of the upper layer can be brought to the lower layer on the pipe wall when the sampling pipe stretches into the liquid from top to bottom, so that the liquid on the lower layer can be mixed with a trace amount of the upper layer liquid, and the detection error occurs.
Disclosure of Invention
The invention aims to:
aiming at the problem that when the sampling tube is used for carrying out layered sampling, part of upper liquid is brought to the lower layer on the tube wall when the sampling tube stretches into the liquid from top to bottom, so that the lower layer liquid is mixed with a trace amount of upper liquid, and the detection is error, the invention provides a spiral sampling device for detecting liquid food.
The technical scheme is as follows:
a spiral sampling device for liquid food detection, for sampling during liquid food detection, comprising: the utility model provides a vertical pipeline, a plurality of first holding case, a plurality of disc and a plurality of connecting tube, first holding case is arranged from top to bottom in the vertical pipeline, first holding case is cylindric, the disc set up in the bottom of first holding case, the disc with first holding case is passed through connecting tube connects, connecting tube connects the position that first holding case sets up first switch door, the first axis that holds the case the axis of vertical pipeline with the axis of disc coincides each other, the disc includes shell, duplex lateral wall and a plurality of filter screen, the shell with duplex lateral wall constitutes the screw channel, the filter screen set up in the screw channel is more close the screw channel center the mesh of filter screen is littleer, the shell sets up two first openings, first opening is according to the centre of a circle centrosymmetric of disc, the opening is connected to the opening, the vertical pipeline sets up the second opening, first opening with the second opening links up.
As a preferable mode of the present invention, the present invention further comprises a pre-absorption hole, a pre-absorption pipe, and a second accommodation box, wherein the second accommodation box is disposed at the lower end of the longitudinal pipe, the pre-absorption hole is disposed at the outer side wall of the longitudinal pipe, the pre-absorption pipe is disposed inside the longitudinal pipe, and the pre-absorption pipe is connected with the pre-absorption hole and the second accommodation box.
As a preferable mode of the invention, the pre-absorption hole is opened obliquely downward, the pre-absorption pipe is divided into a front section part and a rear section part, the front section part of the pre-absorption pipe and the rear section part of the pre-absorption pipe are in a tower-tip shape, and the front section part of the pre-absorption pipe and the rear section part of the pre-absorption pipe are in opposite oblique directions.
As a preferable mode of the present invention, the second opening is provided with a receiving groove and a second switch door, the second switch door is provided in the receiving groove, and the second switch door is a telescopic door.
As a preferred mode of the invention, the inner side wall of the second opening is provided with a telescopic plate, and the telescopic plate extends from the second opening and the first opening to the outside of the outer side wall of the longitudinal pipeline.
As a preferable mode of the invention, the longitudinal pipeline is divided into a plurality of component parts according to the number of the first containing boxes, a cylindrical space is arranged in each component part, the cylindrical space is used for containing the first containing boxes, the top of each component part is provided with a convex ring, the bottom of each component part is provided with a cylindrical groove, the outer side wall of each convex ring is provided with external threads, the inner side wall of each cylindrical groove is provided with internal threads, and the external threads of the outer side wall of each convex ring are engaged with the internal threads of the inner side wall of each cylindrical groove.
As a preferable mode of the invention, the top of the second accommodating box is also provided with the convex ring, the outer side wall of the convex ring is provided with external threads, the top of the longitudinal pipeline is provided with a top cover, and the lower end of the top cover is also provided with a cylindrical groove.
As a preferable mode of the present invention, the first housing tank is provided with a first air pressure device, and the second housing tank is provided with a second air pressure device for adjusting the air pressure in the first housing tank and absorbing the liquid food, and the second air pressure device is used for adjusting the air pressure in the second housing tank and absorbing the liquid food.
As a preferred mode of the present invention, the present invention further comprises a processing device, the processing device is connected to the first air pressure device, the second air pressure device, the first switch door, the second switch door and the expansion board, and the processing device is used for controlling the movement of the first air pressure device, the second air pressure device, the first switch door, the second switch door and the expansion board.
As a preferred form of the invention, the cover is provided with a set of buttons which control the processing means.
The invention has the following beneficial effects:
before sampling, liquid food distributed near the surface of the outer pipeline is absorbed into the second accommodating box by utilizing pre-absorbing holes distributed on the outer side of the longitudinal pipeline, so that the liquid in a part of the upper layer is absorbed by the pipe wall when the sampling pipe stretches into the liquid from top to bottom, and then the liquid food is sampled, thereby avoiding the liquid in the part of the upper layer from the pipe wall to the lower layer when the sampling pipe stretches into the liquid from top to bottom, and further reducing the possibility of error in detection. The liquid food is filtered through the spiral channel enhancement, so that the detection result is not influenced by impurities.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a longitudinal pipe connection according to the present invention;
fig. 3 is a schematic view of a disk according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Embodiment one:
reference is made to fig. 1-3. A spiral sampling device for liquid food detection, for sampling during liquid food detection, comprising: the utility model provides a vertical pipeline 1, a plurality of first holding case 2, a plurality of disc 3 and a plurality of connecting tube 4, first holding case 2 arranges from top to bottom in vertical pipeline 1, first holding case 2 is cylindricly, disc 3 set up in the bottom of first holding case 2, disc 3 with first holding case 2 passes through connecting tube 4 connects, connecting tube 4 connects the position of first holding case 2 sets up first switch door 5, the axis of first holding case 2 the axis of vertical pipeline 1 and the axis of disc 3 coincide each other, disc 3 includes shell 6, double helix lateral wall 7 and a plurality of filter screen, shell 6 with double helix lateral wall 7 constitutes the screw channel, the filter screen set up in the screw channel is close more the mesh of filter screen is little at the screw channel center, shell 6 sets up two first openings 9, first opening 9 is according to the central symmetry of disc 3, the vertical pipeline of opening 1 of screw channel and second opening 10 link up with second opening 10.
As a preferable mode of the present invention, the device further comprises a pre-absorbing hole 11, a pre-absorbing pipe 12 and a second accommodating box 13, wherein the second accommodating box 13 is arranged at the lower end of the longitudinal pipe 1, the pre-absorbing hole 11 is arranged at the outer side wall of the longitudinal pipe 1, the pre-absorbing pipe 12 is arranged inside the longitudinal pipe 1, and the pre-absorbing pipe 12 connects the pre-absorbing hole 11 and the second accommodating box 13.
As a preferable mode of the present invention, the pre-absorption hole 11 is opened obliquely downward, the pre-absorption pipe 12 is divided into a front section and a rear section, the front section of the pre-absorption pipe 12 and the rear section of the pre-absorption pipe 12 are in a tower shape, and the front section of the pre-absorption pipe 12 and the rear section of the pre-absorption pipe 12 are in opposite oblique directions.
As a preferable mode of the present invention, the second opening 10 is provided with a receiving groove 14 and a second switch door 15, the second switch door 15 is provided in the receiving groove 14, and the second switch door 15 is a telescopic door.
As a preferred form of the invention, the inner side wall of the second opening 10 is provided with a telescopic plate 16, which telescopic plate 16 extends from the second opening 10 and the first opening 9 beyond the outer side wall of the longitudinal duct 1.
As a preferred mode of the invention, the longitudinal pipeline 1 is divided into a plurality of components according to the number of the first accommodating boxes 2, a cylindrical space is arranged in each component, the cylindrical space is used for accommodating the first accommodating boxes 2, the top of each component is provided with a convex ring, the bottom of each component is provided with a cylindrical groove, the outer side wall of each convex ring is provided with external threads, the inner side wall of each cylindrical groove is provided with internal threads, and the external threads of the outer side wall of each convex ring are engaged with the internal threads of the inner side wall of each cylindrical groove.
As a preferable mode of the invention, the top of the second accommodating box 13 is also provided with the convex ring shape, the outer side wall of the convex ring is provided with external threads, the top of the longitudinal pipeline 1 is provided with a top cover, and the lower end of the top cover is also provided with a cylindrical groove.
As a preferred mode of the present invention, the first housing tank 2 is provided with a first air pressure device, and the second housing tank 13 is provided with a second air pressure device for adjusting the air pressure in the first housing tank 2 and absorbing the liquid food, and the second air pressure device is used for adjusting the air pressure in the second housing tank 13 and absorbing the liquid food.
As a preferred mode of the present invention, the present invention further comprises a processing device connected to the first air pressure device, the second air pressure device, the first switch door 5, the second switch door 15, and the expansion plate 16, wherein the processing device is configured to control the movements of the first air pressure device, the second air pressure device, the first switch door 5, the second switch door 15, and the expansion plate 16.
As a preferred form of the invention, the cover is provided with a set of buttons which control the processing means.
In the specific implementation process, when the device stretches into the liquid food, the device slowly stretches into the liquid lower layer from the upper liquid layer, and in the process, as the longitudinal pipeline 1 of the device contacts the liquid food, a certain amount of liquid food is adhered to the longitudinal pipeline 1, so that the liquid food adhered to the outer side of the longitudinal pipeline 1 can be mixed with the liquid food on the lower layer whenever the device stretches downwards, and layering of the liquid food is damaged to a certain degree.
Therefore, a sampling device capable of sampling liquid food is provided, wherein, the first holding box 2 is arranged in the longitudinal pipeline 1 from top to bottom, the first holding box 2 is cylindrical, the disc 3 is arranged at the bottom of the first holding box 2, the disc 3 is connected with the first holding box 2 through the connecting pipeline 4, the first opening and closing door 5 is arranged at the position where the connecting pipeline 4 is connected with the first holding box 2, the central axis of the longitudinal pipeline 1 and the central axis of the disc 3 coincide with each other, the disc 3 comprises a shell 6, a double-spiral side wall 7 and a plurality of filter screens, the shell 6 and the double-spiral side wall 7 form a spiral channel, the filter screens are arranged in the spiral channel, the smaller the meshes of the filter screens are close to the center of the spiral channel, the shell 6 is provided with two first openings 9, the first openings 9 are symmetrical according to the center of the circle center of the disc 3, the open ends of the spiral channel are connected with the second openings 10, and the longitudinal pipeline 1 is provided with the second openings 10. The second holds case 13 and sets up in vertical pipeline 1 lower extreme, and the preabsorption hole 11 sets up in vertical pipeline 1 lateral wall, and preabsorption pipeline 12 sets up in vertical pipeline 1 inside, and preabsorption pipeline 12 connects preabsorption hole 11 and second and holds case 13. The pre-absorption hole 11 is opened obliquely downward, the pre-absorption pipeline 12 is divided into a front section part and a rear section part, the front section part of the pre-absorption pipeline 12 and the rear section part of the pre-absorption pipeline 12 are in a tower-tip shape, and the inclination directions of the front section part of the pre-absorption pipeline 12 and the rear section part of the pre-absorption pipeline 12 are opposite. The second opening 10 is provided with a receiving groove 14 and a second switch door 15, and a portion of the second switch door 15 is provided in the receiving groove 14, and the second switch door 15 is a telescopic door. The inner side wall of the second opening 10 is provided with a telescopic plate 16, which telescopic plate 16 extends from the second opening 10 and the first opening 9 beyond the outer side wall of the longitudinal duct 1. The first container 2 is provided with a first air pressure device, the second container 13 is provided with a second air pressure device, the first air pressure device is used for adjusting air pressure in the first container 2 and absorbing liquid food, the second air pressure device is used for adjusting air pressure in the second container 13 and absorbing liquid food, the processing device is connected with the first air pressure device, the second air pressure device, the first switch door 5, the second switch door 15 and the expansion plate 16, and the processing device is used for controlling the movement of the first air pressure device, the second air pressure device, the first switch door 5, the second switch door 15 and the expansion plate 16, and the top cover is provided with a button group which controls the processing device.
In the actual sampling process, assuming that there are two first housing boxes 2 in total, the two first housing boxes 2 are arranged in the longitudinal duct 1 up and down, the operator stretches the sampling device into the liquid food, and after stretching into a depth suitable for sampling, the operator starts to control by using the button group arranged on the top cover. In the initial state, the first switch door 5 and the second switch door 15 are both in the closed state, the button group can be provided with a first working process button, in the first working process, the processing device controls the second air pressure device to reduce the air pressure in the second accommodating box 13, so that the air pressure in the second accommodating box 13 and the pre-absorption pipeline 12 is gradually reduced, a part of the liquid food closest to the longitudinal pipeline 1 can be slowly absorbed into the second accommodating box 13, the food solution obtained by mixing the liquid food adhered to the outer side of the longitudinal pipeline 1 with the liquid food at the lower layer is absorbed into the second accommodating box 13, after the second accommodating box 13 and the pre-absorption pipeline 12 are filled with the mixed liquid food, the absorption of the liquid food is stopped, and the processing device controls the second air pressure device to stop working.
The button group can also be provided with a button of a second working process, under the second working process, the processing device controls the second switch door 15 to retract into the accommodating groove 14 so as to open the second switch door 15 and control the first switch door 5 to open, after the second switch door 15 is opened, the processing device controls the expansion plate 16 to extend, because the expansion plate 16 is arranged at the inner side wall around the first opening 9 and the first opening 9 corresponds to the second opening 10, after the expansion plate 16 extends, a part of the area outside the sampling device can be framed, so that the sampling can be performed from the framed area, liquid foods adjacent to the layering area are prevented from being affected in the sampling process, the processing device controls each first air pressure device to reduce the air pressure in the first accommodating box 2, so that the air pressure in the first accommodating box 2 and the disc 3 is gradually reduced, and the liquid foods outside the sampling device can be absorbed. After the liquid food enters the disc 3, the liquid food can enter the first accommodating cavity through the spiral channel and the connecting pipeline 4, and in the spiral channel, the liquid food can gradually pass through a plurality of filter screens, and the filter screens closer to the center of the disc 3 are finer, so that the liquid food is gradually filtered, and the liquid food cannot be blocked.
The longitudinal pipeline 1 is divided into a plurality of component parts according to the quantity of the first accommodating boxes 2, the inside cylindrical space of component parts is arranged, the cylindrical space is used for accommodating the first accommodating boxes 2, the top of the component parts is provided with a convex ring, the bottom of the component parts is provided with a cylindrical groove, the outer side wall of the convex ring is provided with external threads, the inner side wall of the cylindrical groove is provided with internal threads, and the external threads of the outer side wall of the convex ring are engaged with the internal threads of the inner side wall of the cylindrical groove. The top of the second accommodating box 13 is also provided with a convex ring shape, the outer side wall of the convex ring is provided with external threads, the top of the longitudinal pipeline 1 is provided with a top cover, and the lower end of the top cover is also provided with a cylindrical groove.
The foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same according to the present invention, not to limit the scope of the present invention. All changes and modifications that come within the meaning and range of equivalency of the invention are to be embraced within their scope.
Claims (6)
1. A spiral sampling device for liquid food detection for sample when detecting liquid food, characterized in that includes: the device comprises a longitudinal pipeline, a plurality of first accommodating boxes, a plurality of discs, a plurality of connecting pipelines, a pre-absorption hole, a pre-absorption pipeline, a second accommodating box and a processing device; the first accommodating box is arranged in the longitudinal pipeline up and down, the first accommodating box is cylindrical, the disc is arranged at the bottom of the first accommodating box, the disc is connected with the first accommodating box through the connecting pipeline, a first switch door is arranged at the position where the connecting pipeline is connected with the first accommodating box, the central axis of the longitudinal pipeline and the central axis of the disc are mutually overlapped, the disc comprises a shell, a double-spiral side wall and a plurality of filter screens, the shell and the double-spiral side wall form a spiral channel, the filter screens are arranged in the spiral channel, the smaller the mesh of the filter screen is, the smaller the filter screen is, the shell is provided with two first openings, the first openings are symmetrical according to the center of the circle center of the disc, the open ends of the spiral channel are connected with the first openings, the longitudinal pipeline is provided with a second opening, and the first openings are connected with the second openings;
the second accommodating box is arranged at the lower end of the longitudinal pipeline, the pre-absorption hole is formed in the outer side wall of the longitudinal pipeline, the pre-absorption pipeline is arranged inside the longitudinal pipeline, and the pre-absorption pipeline is connected with the pre-absorption hole and the second accommodating box; the second opening is provided with an accommodating groove and a second switch door, the second switch door is arranged in the accommodating groove, and the second switch door is a telescopic door; the first accommodating box is provided with a first air pressure device, the second accommodating box is provided with a second air pressure device, the first air pressure device is used for adjusting the air pressure in the first accommodating box and absorbing liquid food, and the second air pressure device is used for adjusting the air pressure in the second accommodating box and absorbing liquid food;
the processing device is connected with the first air pressure device, the second air pressure device, the first switch door, the second switch door and the expansion board, and the processing device is used for controlling the movement of the first air pressure device, the second air pressure device, the first switch door, the second switch door and the expansion board.
2. A spiral sampling device for liquid food testing according to claim 1, wherein: the pre-absorption hole is opened in a downward inclined mode, the pre-absorption pipeline is divided into a front section part and a rear section part, the front section part of the pre-absorption pipeline and the rear section part of the pre-absorption pipeline are in a tower-tip shape, and the inclination directions of the front section part of the pre-absorption pipeline and the rear section part of the pre-absorption pipeline are opposite.
3. A spiral sampling device for liquid food testing according to claim 2, wherein: the inside wall of the second opening is provided with a telescopic plate, and the telescopic plate stretches out of the outside wall of the longitudinal pipeline from the second opening and the first opening.
4. A spiral sampling device for liquid food testing according to claim 3, wherein: the longitudinal pipeline is divided into a plurality of component parts according to the quantity of the first containing boxes, a cylindrical space is arranged inside the component parts, the cylindrical space is used for containing the first containing boxes, the top of the component parts is provided with a convex ring, the bottom of the component parts is provided with a cylindrical groove, the outer side wall of the convex ring is provided with external threads, the inner side wall of the cylindrical groove is provided with internal threads, and the external threads of the outer side wall of the convex ring are engaged with the internal threads of the inner side wall of the cylindrical groove.
5. The spiral sampling apparatus for liquid food testing according to claim 4, wherein: the second holds the case top and also sets up to protruding cyclic annular, bulge loop lateral wall sets up the external screw thread, vertical pipeline top sets up the top cap, the cylinder recess is also seted up to the top cap lower extreme.
6. A spiral sampling apparatus for liquid food testing according to claim 5, wherein: the top cover is provided with a button group which controls the processing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705438.5A CN111947983B (en) | 2020-07-21 | 2020-07-21 | Spiral sampling device for liquid food detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705438.5A CN111947983B (en) | 2020-07-21 | 2020-07-21 | Spiral sampling device for liquid food detection |
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| Publication Number | Publication Date |
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| CN111947983A CN111947983A (en) | 2020-11-17 |
| CN111947983B true CN111947983B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010705438.5A Active CN111947983B (en) | 2020-07-21 | 2020-07-21 | Spiral sampling device for liquid food detection |
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| CN (1) | CN111947983B (en) |
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| RU2185223C1 (en) * | 2000-11-10 | 2002-07-20 | Зотов Сергей Борисович | Filter for continuous filtration |
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| CN206563667U (en) * | 2017-03-07 | 2017-10-17 | 王莉 | A kind of sampler of coal chemical industry water environment detection |
| CN210293804U (en) * | 2019-08-06 | 2020-04-10 | 中国农业科学院农业资源与农业区划研究所 | Stratified sampler for fluid animal manure |
| CN110455589A (en) * | 2019-09-06 | 2019-11-15 | 中石化石油工程技术服务有限公司 | Liquid depth sampler |
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| RU2185223C1 (en) * | 2000-11-10 | 2002-07-20 | Зотов Сергей Борисович | Filter for continuous filtration |
| CN103398871B (en) * | 2013-07-25 | 2016-03-16 | 莱芜钢铁集团有限公司 | A kind of portable fluid sampler and sampling method thereof |
| CN109724838A (en) * | 2017-10-27 | 2019-05-07 | 韦丽秋 | Food inspection sampler |
| CN208223888U (en) * | 2018-05-22 | 2018-12-11 | 孟哲 | A kind of sampler for food inspection |
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| CN111947983A (en) | 2020-11-17 |
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