CN216285006U - On-line detection device for heavy metals in grains - Google Patents
On-line detection device for heavy metals in grains Download PDFInfo
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- CN216285006U CN216285006U CN202122689251.3U CN202122689251U CN216285006U CN 216285006 U CN216285006 U CN 216285006U CN 202122689251 U CN202122689251 U CN 202122689251U CN 216285006 U CN216285006 U CN 216285006U
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Abstract
The utility model discloses an online detection device for heavy metals in grains, which comprises: the grinding machine comprises a discharge port with a downward opening, the bottom of the discharge port is provided with a sliding door, and the sliding door is driven by a first driving mechanism to open or close the discharge port; the XRF detector is arranged on one side below the grinder and comprises a sample cavity with an opening penetrating through the top of the sample cavity, and a sliding cover is arranged on the top of the sample cavity and is driven by a second driving mechanism to open or close the sample cavity; the material receiving mechanism comprises a material receiving plate arranged below the discharge port, a sample tube for receiving materials is placed on the material receiving plate, the material receiving plate is connected with a first power source, and the first power source drives the material receiving plate to horizontally move between the discharge port and the sample cavity; the discharging mechanism is arranged right above the sample cavity and comprises a pneumatic clamping jaw for clamping/discharging a sample tube and a second power source for driving the pneumatic clamping jaw to move up and down.
Description
Technical Field
The utility model relates to the technical field of detection. More specifically, the utility model relates to an online detection device for heavy metals in grains.
Background
When detecting the heavy metal content in the cereal through the XRF detector, need earlier grind the machine with cereal and become the powder, the powder sample that will grind is packed into the sample test tube, put into the XRF detector with the sample test tube again and detect, wherein, cereal grinds to the powder back in grinding the machine, need the staff to collect the powder, place the powder in the sample test tube through the staff, the rethread staff puts into the XRF detector with the sample test tube, whole testing process mechanization degree is low, can't realize on-line monitoring.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The utility model also aims to provide an on-line detection device for heavy metals in grains, which can automatically sample and has high mechanization degree in the detection process.
To achieve these objects and other advantages in accordance with the present invention, there is provided an on-line detection apparatus for heavy metals in grains, comprising:
the grinder comprises a discharge port with a downward opening, the bottom of the discharge port is provided with a sliding door, and the sliding door is driven by a first driving mechanism to open or close the discharge port;
the XRF detector is arranged on one side below the grinder and comprises a sample cavity with an opening penetrating through the top of the sample cavity, and a sliding cover is arranged on the top of the sample cavity and is driven by a second driving mechanism to open or close the sample cavity;
the receiving mechanism comprises a receiving plate arranged below the discharge port, a sample tube for receiving materials is placed on the receiving plate, the receiving plate is connected with a first power source, and the first power source drives the receiving plate to horizontally move between the discharge port and the sample cavity;
and the discharging mechanism is arranged right above the sample cavity and comprises a pneumatic clamping jaw for clamping/placing the sample tube and a second power source for driving the pneumatic clamping jaw to move up and down.
Preferably, a recovery box and a new pipe box with open tops are arranged on one side of the XRF detector, which is far away from the grinder;
the discharging mechanism further comprises a third power source for driving the pneumatic clamping jaw to move among the sample cavity, the recovery box and the new pipe box.
Preferably, the top of the grinding mill is provided with a feed inlet with an upward opening, a spray head spraying water towards the feed inlet and a blower blowing air towards the feed inlet are arranged above the feed inlet, a containing box with an upward opening is arranged below the discharge outlet, and the projection of the discharge outlet in the vertical direction is positioned in the opening of the containing box.
Preferably, the grinding machine comprises two grinding boxes which are sequentially communicated from top to bottom, two grinding rollers which are parallel to each other along the horizontal direction are arranged in each grinding box, a gap for grain powder to pass through is formed between the two grinding rollers, and each grinding roller is driven to rotate by a rotating mechanism;
the feed inlet is positioned at the top of the upper grinding box, and the discharge outlet is positioned at the bottom of the lower grinding box.
Preferably, the first power source is a first cylinder horizontally arranged, and an output end of the first cylinder is fixedly connected with the material receiving plate.
Preferably, the second power source is a vertically arranged second cylinder, and the output end of the second cylinder is fixedly connected with the pneumatic clamping jaw.
Preferably, the grinding machine further comprises a support frame, the support frame comprises a horizontal plate and two vertical plates which are respectively arranged at two ends of the horizontal plate and fixedly connected with the horizontal plate, the grinding machine is fixedly arranged on the horizontal plate, the cylinder body end of the first air cylinder is fixedly arranged on the vertical plate close to the grinding machine, and the cylinder body end of the second air cylinder is fixedly arranged on the horizontal plate.
Preferably, the third power source is a horizontally arranged third cylinder, a cylinder body end of the third cylinder is fixedly arranged on a vertical plate far away from the grinding machine, an output end of the third cylinder is fixedly provided with a sliding block, the sliding block is slidably connected with the horizontal plate, and one end of the sliding block far away from the third cylinder is fixedly connected with a cylinder body end of the second cylinder;
the opening of the recovery box, the opening of the new tube box and the opening of the sample cavity are all positioned below a path of the third cylinder driving the pneumatic clamping jaw to move.
Preferably, the top surface of the material receiving plate is recessed inwards to form a clamping groove matched with the top of the sample tube.
Preferably, the feed inlet and the discharge outlet are funnel-shaped.
The utility model at least comprises the following beneficial effects:
when the novel device is used for detecting the content of heavy metals in grains, a discharge port of a grinding machine is closed through a sliding door, the grains are put into the grinding machine to be ground into powder, a sample tube is moved to the position under the discharge port under the drive of a first power source, the sliding door is opened to enable the powder to enter a sample tube, when the sample tube is filled with enough powder, the discharge port is closed through the sliding door, the sample tube is moved to the position over a sample cavity under the drive of the first power source, a pneumatic clamping jaw grasps the sample tube and slightly moves upwards under the drive of a second power source, a material receiving plate is moved towards the direction of the grinding machine under the drive of the first power source, the sample tube is put into the sample cavity under the drive of the second power source, after the sample tube is placed, the pneumatic clamping jaw is driven by the second power source to move to the position over the sample cavity, a sliding cover closes the sample cavity under the drive of a second driving mechanism, after accomplishing above-mentioned process, the XRF detector carries out sample detection, and this is novel through setting up receiving mechanism and drop feed mechanism, has reduced the artifical process that connects material and blowing, has improved the degree of mechanization of whole testing process.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a cross-sectional view of an on-line detection device for heavy metals in grains according to one embodiment of the present invention.
Reference numerals: the device comprises a grinding machine 1, a discharge hole 2, a sliding door 3, an XRF detector 4, a sample cavity 5, a sliding cover 6, a material receiving plate 7, a sample tube 8, a first power source 9, a pneumatic clamping jaw 10, a second power source 11, a recovery box 12, a new tube box 13, a third power source 14, a feed inlet 15, a spray head 16, a blower 17, a containing box 18, a grinding box 19, a grinding roller 20, a support frame 21, a horizontal plate 22, a vertical plate 23 and a sliding block 24.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the utility model by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1, the present invention provides an online detection device for heavy metals in grains, comprising:
the grinding machine 1 comprises a discharge port 2 with a downward opening, the bottom of the discharge port 2 is provided with a sliding door 3, and the sliding door 3 is driven by a first driving mechanism to open or close the discharge port 2;
the XRF detector 4 is arranged on one side below the grinder 1, the XRF detector 4 comprises a sample cavity 5 with an opening penetrating through the top of the sample cavity, a sliding cover 6 is arranged on the top of the sample cavity 5, and the sliding cover 6 is driven by a second driving mechanism to open or close the sample cavity 5;
the receiving mechanism comprises a receiving plate 7 arranged below the discharge port 2, sample tubes 8 for receiving materials are placed on the receiving plate 7, the receiving plate 7 is connected with a first power source 9, and the first power source 9 drives the receiving plate 7 to horizontally move between the discharge port 2 and the sample cavity 5;
and the discharging mechanism is arranged right above the sample cavity 5 and comprises a pneumatic clamping jaw 10 for clamping/discharging the sample tube 8 and a second power source 11 for driving the pneumatic clamping jaw 10 to move up and down.
Wherein, in order to make the detection accurate enough, the material used in the grinder 1 does not cause heavy metal pollution to the grains, for example, the portion of the grinder 1 directly contacting with the sample may be made of titanium alloy or polytetrafluoroethylene.
In the technical scheme, the on-line detection device for heavy metals in grains comprises a grinding machine 1, an XRF detector 4, a material receiving mechanism and a material discharging mechanism, wherein an opening of a material outlet 2 of the grinding machine 1 is downward, the aim is to facilitate the ground powder to automatically fall under the action of gravity, the opening of the discharge port 2 is provided with a sliding door 3, one side of the sliding door 3 is connected with a first driving mechanism, the first driving mechanism can be a telescopic cylinder, the cylinder body end of the telescopic cylinder is fixedly connected with the grinding machine 1, the output end is fixedly connected with one side of the sliding door 3, the sliding door 3 can be driven to close or open the discharge hole 2 through the telescopic cylinder, the purpose of the sliding door 3 is that the grinding machine 1 can avoid the ground powder from falling out of the grinding machine 1 during grinding, while after the grinder 1 has discharged a certain amount of powder, additional powder can be left in the grinder 1 by closing the sliding door 3; the XRF detector 4 has a sample cavity 5 for placing a sample, and after the sample is placed in the sample cavity 5, the sliding cover 6 is controlled by the second driving mechanism to close the sample cavity 5, so that the sample can be detected; the receiving mechanism comprises a receiving plate 7 and a first power source 9, the receiving plate 7 is horizontally arranged, a sample tube 8 is arranged on the receiving plate 7, the first power source 9 is arranged on one side of the receiving plate 7, the receiving plate 7 can be controlled to horizontally move between the discharge port 2 and the sample cavity 5 through the first power source 9, and the receiving plate 7 drives the sample tube 8 to move between the discharge port 2 and the sample cavity 5; drop feed mechanism includes pneumatic clamping jaw 10 and second power supply 11, and pneumatic clamping jaw 10 is used for pressing from both sides or lofting product pipe 8, and second power supply 11 is connected with pneumatic clamping jaw 10 for drive pneumatic clamping jaw 10 and remove in vertical direction, this novel also not restriction second power supply 11 specific structure, as long as can drive pneumatic clamping jaw 10 and remove in vertical direction can.
When the novel device is used for detecting the content of heavy metals in grains, a discharge port 2 of a grinding machine 1 is closed through a sliding door 3, the grains are put into the grinding machine 1 to be ground into powder, a sample tube 8 is moved to the position right below the discharge port 2 under the drive of a first power source 9, the sliding door 3 is opened to enable the powder to enter a sample tube 8, when enough powder is filled in the sample tube 8, the discharge port 2 is closed through the sliding door 3, the sample tube 8 moves to the position right above a sample cavity 5 under the drive of the first power source 9, a pneumatic clamping jaw 10 grasps the sample tube 8 and slightly moves upwards under the drive of a second power source 11, a material receiving plate 7 moves towards the grinding machine 1 under the drive of the first power source 9, meanwhile, the sample tube 8 is put into the sample cavity 5 under the drive of the second power source 11, the second power source 11 drives the pneumatic clamping jaw 10 to move to the position above the sample cavity 5, the sliding cover 6 closes the sample cavity 5 under the drive of the second driving mechanism, and after the process is completed, the XRF detector 4 performs sample detection, and the novel process of manual material receiving and discharging is reduced by arranging the material receiving mechanism and the material discharging mechanism, so that the mechanization degree of the whole detection process is improved.
Wherein, in order to avoid the sample tube 8 to fill the in-process powder that connects the powder in the air, the opening of sample tube 8 is very close to discharge gate 2, and after having connect the powder greatly, discharge gate 2 is closed earlier to sliding door 3, then moves sample tube 8 again.
In another technical scheme, a recovery box 12 and a new pipe box 13 with open tops are arranged on one side of the XRF detector 4 far away from the grinder 1; the discharging mechanism further comprises a third power source 14 for driving the pneumatic clamping jaws 10 to move among the sample cavity 5, the recovery box 12 and the new tube box 13, wherein the recovery box 12 is used for placing used sample tubes 8, the new tube box 13 is used for placing clean sample tubes 8, after a sample is detected, the slide cover 6 is opened through the driving of the second driving mechanism, after the slide cover 6 is opened, the pneumatic clamping jaws 10 take out the detected sample tubes 8 under the driving of the second power source 11, the detected sample tubes 8 are put into the recovery box 12 under the driving of the third power source 14 and the second power source 11, then new sample tubes 8 are taken out from the new tube box 13 and move to the position right above the sample cavity 5, the material receiving plate 7 moves to the position below the new sample tubes 8 under the driving of the first power source 9, the new sample tubes 8 make the bottoms of the sample tubes 8 contact with the material receiving plate 7 under the driving of the second power source 11, at this moment, the pneumatic clamping jaw 10 releases the new sample tube 8, and the new sample tube 8 moves to the lower part of the discharge port 2 under the driving of the second power source 11, so that the second detection of the sample can be carried out after the operation is completed, and the novel technical scheme can avoid detecting a sample and then manually clean the sample tube 8 or replace the new sample tube 8, thereby further improving the degree of mechanization.
In another technical scheme, a feed port 15 with an upward opening is arranged at the top of the grinding machine 1, a spray head 16 for spraying water towards the feed port 15 and a blower 17 for blowing air towards the feed port 15 are arranged above the feed port 15, a receiving box 18 with an upward opening is arranged below the discharge port 2, the projection of the discharge port 2 along the vertical direction is positioned in the opening of the receiving box 18, when another grain sample needs to be detected, the grinding machine 1 needs to be cleaned, at this time, the receiving plate 7 is not positioned below the discharge port 2 under the driving of the first power source 9, the sliding door 3 is opened to enable all powder to fall into the receiving box 18, wherein the top of the sliding door 3 is abutted against the bottom of the discharge port 2 when the sliding door 3 is closed, when the sliding door 3 is opened, the side wall of the discharge port 2 can scrape the powder on the top surface of the sliding door 3 completely, and after the sliding door 3 is completely opened, firstly, opening a spray head 16 to spray water into the grinding machine 1 for cleaning, after cleaning is finished, opening a blower 17 to blow air towards a feed port 15 in order to accelerate the drying speed of the grinding machine 1, and detecting the next grain sample after the grinding machine 1 is dried;
in order to prevent a large amount of dust from floating in the air when the powder falls into the receiving box 18, water is sprayed into the grinding machine 1 through the spray head 16 before the sliding door 3 is opened, so that the powder in the grinding machine 1 becomes wet.
In another technical solution, the grinding machine 1 comprises two grinding boxes 19 which are sequentially communicated from top to bottom, two grinding rollers 20 which are parallel to each other along the horizontal direction are arranged in each grinding box 19, a gap for grain powder to pass through is arranged between the two grinding rollers 20, and each grinding roller 20 is driven to rotate by a rotating mechanism; wherein the feed inlet 15 is located at the top of the upper grinding box 19 and the discharge outlet 2 is located at the bottom of the lower grinding box 19, with the purpose of enabling the grains to be ground finer.
In another technical solution, the first power source 9 is a first cylinder horizontally disposed, and an output end of the first power source is fixedly connected to the receiving plate 7, as shown in fig. 1, the receiving plate 7 is driven to move by the first cylinder.
In another technical scheme, the second power source 11 is a vertically arranged second cylinder, an output end of the second cylinder is fixedly connected with the pneumatic clamping jaw 10, and as shown in fig. 1, the pneumatic clamping jaw 10 is driven by the second cylinder to move up and down.
In another technical solution, the grinding machine further comprises a support frame 21, the support frame 21 includes a horizontal plate 22 and two vertical plates 23 respectively disposed at two ends of the horizontal plate 22 and fixedly connected to the horizontal plate 22, wherein the grinding machine 1 is fixedly disposed on the horizontal plate 22, a cylinder body end of the first cylinder is fixedly disposed on the vertical plate 23 close to the grinding machine 1, a cylinder body end of the second cylinder is fixedly disposed on the horizontal plate 22, as shown in fig. 1, the grinding machine 1 is fixed on the horizontal plate 22, and the first power source 9 and the third power source 14 are fixed on different vertical plates 23.
In another technical scheme, the third power source 14 is a horizontally arranged third cylinder, a cylinder body end of the third cylinder is fixedly arranged on a vertical plate 23 far away from the grinding machine 1, an output end of the third cylinder is fixedly provided with a slide block 24, the slide block 24 is slidably connected with a horizontal plate 22, and one end of the slide block 24 far away from the third cylinder is fixedly connected with a cylinder body end of the second cylinder; the opening of the recycling bin 12, the opening of the new tube box 13 and the opening of the sample cavity 5 are all located below a path where the third cylinder drives the pneumatic clamping jaw 10 to move, as shown in fig. 1, the recycling bin 12, the new tube box 13 and the detector are basically in a straight line, and as the third driving mechanism is the third cylinder which can only drive the pneumatic clamping jaw 10 to move in the horizontal direction, the opening of the recycling bin 12, the opening of the new tube box 13 and the opening of the sample cavity 5 are basically in the same straight line, so that the pneumatic clamping jaw 10 can extend into the two box bodies and one cavity, and the sample tube 8 can be taken or placed conveniently.
In another technical scheme, the top surface of the material receiving plate 7 is recessed inwards to form a clamping groove matched with the top of the sample tube 8, and the clamping groove is used for clamping the sample tube 8, so that the situation that the sample tube 8 falls off from the material receiving plate 7 due to unstable placement of the sample tube 8 in the moving process of the material receiving plate 7 is avoided.
In another technical scheme, the feed inlet 15 and the discharge outlet 2 are funnel-shaped, so that the material can flow conveniently.
Use the conveyer belt to transport cereal at present, whether up to standard for heavy metal content in the cereal that can real-time supervision conveyer belt, the feed inlet 2 that will grind machine 1 sets up the one side along length direction at the conveyer belt, the opposite side of conveyer belt sets up automatic push rod, automatic push rod is close to the one end of feed inlet 2 and is equipped with the push pedal, can be once with cereal propelling movement to the feed inlet 2 on the conveyer belt, this automatic push rod can promote once every a period, the cereal that pushes in the feed inlet 2 carries out heavy metal content's detection according to above-mentioned mode.
Meanwhile, in order to enable the sample in the sample tube 8 to be compacted to be convenient for detection, a telescopic cylinder is vertically and fixedly arranged on a horizontal plate 22 between the grinding machine 1 and the XRF detector 4, the cylinder body end of the telescopic cylinder is fixedly connected with the horizontal plate 22, the output end of the telescopic cylinder is provided with a compaction block, the telescopic cylinder stops moving when the sample tube 8 filled with the sample moves to the position below the compaction block, the compaction block enters the sample tube 8 through the driving of the telescopic cylinder and is compacted and then comes out, the sample is compacted by the compacted sample tube 8, wherein in order to keep the compaction block clean, an air blowing device can be arranged on one side of the compaction block close to the detector, when the sliding cover 6 seals the sample cavity 5, namely, when the detector detects the sample, the air blowing device blows air towards one side of the grinding machine, and powder on the compaction block is blown away.
For convenient real-time on-line measuring data, XRF detector 4 passes through internet access with user terminal, and the result that detects promptly can show on software such as APP on cell-phone or computer, and corresponding heavy metal content still can be calculated to this software simultaneously, and when heavy metal content exceeded standard, user terminal can send out the warning and remind.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. The application, modification and variation of the device for the on-line detection of heavy metals in cereals according to the utility model will be apparent to those skilled in the art.
While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. On-line measuring device of heavy metal in cereal, its characterized in that includes:
the grinder comprises a discharge port with a downward opening, the bottom of the discharge port is provided with a sliding door, and the sliding door is driven by a first driving mechanism to open or close the discharge port;
the XRF detector is arranged on one side below the grinder and comprises a sample cavity with an opening penetrating through the top of the sample cavity, and a sliding cover is arranged on the top of the sample cavity and is driven by a second driving mechanism to open or close the sample cavity;
the receiving mechanism comprises a receiving plate arranged below the discharge port, a sample tube for receiving materials is placed on the receiving plate, the receiving plate is connected with a first power source, and the first power source drives the receiving plate to horizontally move between the discharge port and the sample cavity;
and the discharging mechanism is arranged right above the sample cavity and comprises a pneumatic clamping jaw for clamping/placing the sample tube and a second power source for driving the pneumatic clamping jaw to move up and down.
2. The apparatus for on-line detection of heavy metals in grain according to claim 1, wherein a recovery tank and a new pipe tank with open top are placed on the side of the XRF detector away from the grinder;
the discharging mechanism further comprises a third power source for driving the pneumatic clamping jaw to move among the sample cavity, the recovery box and the new pipe box.
3. The device for on-line detection of heavy metals in grains according to claim 1, wherein the top of the grinding mill is provided with a feed port with an upward opening, a spray head for spraying water towards the feed port and a blower for blowing air towards the feed port are arranged above the feed port, a receiving box with an upward opening is arranged below the discharge port, and the projection of the discharge port along the vertical direction is positioned in the opening of the receiving box.
4. The apparatus for on-line detection of heavy metals in grains according to claim 3, wherein said grinder comprises two grinding boxes sequentially connected from top to bottom, each grinding box having two grinding rollers horizontally parallel to each other and having a gap therebetween for grain powder to pass through, each grinding roller being driven to rotate by a rotating mechanism;
the feed inlet is positioned at the top of the upper grinding box, and the discharge outlet is positioned at the bottom of the lower grinding box.
5. The device for on-line detection of heavy metals in grain according to claim 2, wherein said first power source is a horizontally disposed first cylinder, and the output end of said first cylinder is fixedly connected to said material receiving plate.
6. The device for on-line detection of heavy metals in grains according to claim 5, wherein the second power source is a second cylinder vertically arranged, and an output end of the second cylinder is fixedly connected with the pneumatic clamping jaw.
7. The device for on-line detection of heavy metals in grain according to claim 6, further comprising a supporting frame, wherein the supporting frame comprises a horizontal plate and two vertical plates respectively disposed at two ends of the horizontal plate and fixedly connected thereto, wherein the grinding machine is fixedly disposed on the horizontal plate, the cylinder body end of the first cylinder is fixedly disposed on the vertical plate close to the grinding machine, and the cylinder body end of the second cylinder is fixedly disposed on the horizontal plate.
8. The device for on-line detection of heavy metals in grains according to claim 7, wherein the third power source is a horizontally arranged third cylinder, the cylinder body end of the third cylinder is fixedly arranged on a vertical plate far away from the grinding machine, the output end of the third cylinder is fixedly provided with a slide block, the slide block is slidably connected with the horizontal plate, and one end of the slide block far away from the third cylinder is fixedly connected with the cylinder body end of the second cylinder;
the opening of the recovery box, the opening of the new tube box and the opening of the sample cavity are all positioned below a path of the third cylinder driving the pneumatic clamping jaw to move.
9. The device for on-line detection of heavy metals in grain according to claim 5, wherein the top surface of the material receiving plate is recessed inwards to form a clamping groove matched with the top of the sample tube.
10. The on-line detection device for the heavy metals in the grains according to claim 4, wherein the feed port and the discharge port are funnel-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122689251.3U CN216285006U (en) | 2021-11-04 | 2021-11-04 | On-line detection device for heavy metals in grains |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122689251.3U CN216285006U (en) | 2021-11-04 | 2021-11-04 | On-line detection device for heavy metals in grains |
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| Publication Number | Publication Date |
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| CN216285006U true CN216285006U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122689251.3U Active CN216285006U (en) | 2021-11-04 | 2021-11-04 | On-line detection device for heavy metals in grains |
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| CN (1) | CN216285006U (en) |
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2021
- 2021-11-04 CN CN202122689251.3U patent/CN216285006U/en active Active
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