CN211274727U - Heavy metal detection sample pretreatment workbench - Google Patents
Heavy metal detection sample pretreatment workbench Download PDFInfo
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- CN211274727U CN211274727U CN201921476036.1U CN201921476036U CN211274727U CN 211274727 U CN211274727 U CN 211274727U CN 201921476036 U CN201921476036 U CN 201921476036U CN 211274727 U CN211274727 U CN 211274727U
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Abstract
The utility model discloses a heavy metal detection sample pretreatment workbench, which comprises a microwave digestion instrument, wherein the top of the microwave digestion instrument is provided with a door opening and closing device for opening and closing the microwave digestion instrument, the sample pretreatment workbench further comprises a sample adding device for adding samples into a digestion tank, a reagent adding device for adding reagents into the samples, a first mechanical arm for moving a sample placing plate and the digestion tank, and a second mechanical arm for setting digestion instrument parameters, weighing devices capable of calculating weight are arranged below the sample adding device and the reagent adding device, the sample pretreatment workbench further comprises an acid dispelling device and an acid dispelling workbench, the microwave digestion instrument, the sample adding device, the reagent adding device, the first mechanical arm, the second mechanical arm, the weighing devices, the acid dispelling device and the acid dispelling workbench are all arranged in a glass chamber, the side of the glass chamber is provided with a plurality of ventilation devices, and the outside of the glass chamber is provided with a control operation interface.
Description
Technical Field
The utility model relates to a preceding processing workstation field of integration, concretely relates to heavy metal detects sample pretreatment workstation.
Background
Heavy metal refers to metal with density higher than 4.5g/cm, including gold, silver, copper, iron, mercury, lead, cadmium and the like, which is very difficult to biodegrade, is continuously enriched under the action of food chain biological amplification and finally enters the top organisms of the food chain, such as human beings, and the heavy metal can react with protein, enzyme and the like in human bodies to cause the inactivation and can also accumulate in certain organs of the human bodies to cause chronic poisoning. In terms of environment, heavy metals mainly refer to metals or metalloids such as mercury, cadmium, lead, chromium, arsenic, and the like, and also refer to general heavy metals with certain toxicity, such as copper, zinc, nickel, cobalt, tin, and the like, which are heavy elements with significant biological toxicity and cause pollution to the environment to different degrees.
Heavy metal detection methods are many, including ultraviolet spectrophotometry (UV), Atomic Absorption Spectroscopy (AAS), Atomic Fluorescence (AFS), Inductively Coupled Plasma (ICP), X fluorescence spectroscopy (XRF), inductively coupled plasma mass spectrometry (ICP-MS), and the like. In any of the detection methods, the pretreatment method is almost the same, and it is developed based on the microwave digestion method.
Before heavy metal analysis and detection, a sample needs to be pretreated, the sample to be detected needs to be placed into a digestion tank, strong acid such as concentrated nitric acid is added to serve as a digestion reagent, digestion is carried out through a microwave digestion instrument, the sample is finally taken out to be treated by acid dispelling and cooling, digestion is complete if the digested reagent is clear and transparent, pretreatment of the sample is completed, digestion is incomplete if the digested reagent is turbid and opaque, and digestion needs to be carried out repeatedly by adding nitric acid until clarification is achieved. At present, detect to heavy metal and carry out the pretreatment process in, whole journey is manual operation, not only spend plenty of time, and the uncontrollable condition easily appears in operation process, because strong acid such as concentrated nitric acid has been added to the in-process of clearing up, clear up and can produce a large amount of pungent brown gas, be nitric oxide through the analysis, nitrogen dioxide etc. are the poisonous and harmful gas unfriendly to the environment, brown gas discharges out, pollute the room air, cause the injury to the testing personnel health, therefore, need have a heavy metal detection pretreatment workstation of full automation control, in order to avoid the unfavorable condition that probably appears.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the weak point among the prior art, a heavy metal detects sample pretreatment workstation is provided, this workstation adopts robotic arm to replace manual operation, it is high to have the accuracy, advantages such as degree of automation is perfect, can effectively reduce the human cost, improve work efficiency, integration heavy metal detects pretreatment workstation and separates workstation and operating personnel through closed glass cover, operating personnel need not direct contact microwave and clears up equipment such as appearance and reagents such as concentrated nitric acid, thereby avoid the poisonous harmful substance that produces among the sample pretreatment process to the injury of human body, can retrieve the strong acid and the poisonous harmful gas in the sample, avoid causing the pollution to the environment, accord with the trend of pursuing green development at present.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a heavy metal detection sample pretreatment workbench comprises a microwave digestion instrument, wherein a detachable disc-shaped sample placing disc is arranged inside the microwave digestion instrument, 6 positions for placing digestion tanks are arranged on the detachable disc-shaped sample placing disc, an opening and closing door device for opening and closing a microwave digestion instrument door body is arranged at the top of the microwave digestion instrument and used for controlling the opening and closing of the microwave digestion instrument, the opening and closing door requirement in the automatic sample treatment process is met, the sample pretreatment workbench further comprises a sample adding device for adding samples into the digestion tanks, a reagent adding device for adding reagents into the samples, a first mechanical arm for moving the sample placing disc and the digestion tanks and a second mechanical arm for setting parameters of the microwave digestion instrument, weighing devices capable of calculating weight are arranged below the sample adding device and the reagent adding device, and the initial position of the sample placing disc is positioned, taking out and placing No. 1 digestion tank on a sample placing disc on a weighing device by a first mechanical arm, wherein 6 digestion tanks of the sample placing disc are placed on the same circumference, a sample adding device and a reagent adding device are adjacent and are positioned on the No. 1 digestion tank placing position, the weights of samples and reagents added into the No. 1 digestion tank are regulated, after a preset weight set value is reached, the mechanical arm rotates the sample placing disc to add the samples and the reagents in the next digestion tank until the addition is completed, the sample pretreatment workbench further comprises an acid dispelling device and an acid dispelling workbench, the acid dispelling device is used for dispelling toxic and harmful gases and unreacted acids in the digested samples, finally collecting and recycling the acids and the toxic and harmful gases in the air to avoid causing adverse effects on the environment, and the microwave digestion instrument and the sample adding device are used for collecting and recycling the toxic and harmful gases in the air, Reagent adds device, first robotic arm, second robotic arm, weighing device, catches up with sour device and catch up with sour workstation and all set up in the glass room, avoids the harmful gas that produces to the human body among the sample pretreatment process, the side of glass room is equipped with a plurality of ventilation devices, and ventilation device can discharge harmful gas, the glass outdoor face is equipped with control operation interface for external test operating personnel carries out corresponding setting and control.
Preferably, the door opening and closing device comprises a hydraulic cylinder and a door opening and closing controller, the hydraulic cylinder is used for directly opening and closing the door of the microwave digestion instrument, and the hydraulic cylinder is controlled by the door opening and closing controller.
Preferably, two supporting points of the hydraulic cylinder are respectively fixed on a door body and a machine body of the microwave digestion instrument, the supporting points can rotate relative to the microwave digestion instrument, and the door opening and closing controller can be controlled through the control operation interface.
Preferably, the weighing device comprises a weight sensor, the weighing device is mainly used for controlling the weight of the added sample and reagent, the weight of the added sample and reagent reaches a preset value through the weight sensor, and then the first mechanical arm is controlled to enable the sample placing tray to rotate to the next position, so that the next digestion tank is subjected to sample adding and other work.
Preferably, the acid-removing device comprises a pipe leading to the outside of the glass chamber, a fan arranged at the pipe opening at the indoor end and a recovery device at the pipe opening at the outdoor pipe, unreacted acid after digestion and toxic and harmful gases such as nitric oxide, nitrogen dioxide and the like generated in digestion are blown into the pipeline through the fan device, and then the acid and the toxic and harmful gases in the pipeline air are recovered through the recovery device.
Preferably, the wind in the pipe flows from the glass chamber to the outside of the glass chamber, and the acid and the toxic and harmful gas are driven out of the glass chamber.
Preferably, the reagent adding device comprises a funnel-shaped reagent containing tool for containing the reagent and an electric valve which is positioned at the bottom of the reagent containing tool and is used for controlling the weight of the reagent, so that the precise control of the weight of the reagent is realized.
Preferably, the sample adding device comprises a funnel-shaped sample containing tool and an electric valve at the bottom of the funnel, wherein the electric valve is used for controlling the amount of the reagent, and the accurate control of the weight of the sample is realized.
The utility model discloses the beneficial technological effect who possesses is: the utility model provides a heavy metal testing sample pretreatment workstation, this workstation adopts robotic arm to replace the people operation, have high accuracy, advantages such as full automatization, effectively reduce the human cost, improve work efficiency, and the experimenter need not the direct contact sample, experimental materials such as reagent and instrument equipment such as microwave digestion appearance, harmful substance that avoids producing among the sample pretreatment process produces the human body and produces the injury, can retrieve the nitric oxide that non-reacted strong acid reagent and reaction produced, poisonous and harmful gas such as nitrogen dioxide, avoid causing the pollution to the environment, accord with the trend of pursuing green development at present.
Drawings
FIG. 1 is the utility model relates to a heavy metal detection sample pretreatment workstation's schematic structure.
In the figure: the device comprises a microwave digestion instrument 1, a sample adding device 2, a reagent adding device 3, a first mechanical arm 4, a second mechanical arm 5, a weighing device 6, an acid removing device 7, an acid removing workbench 8, a glass chamber 9, a ventilation device 10, a control operation interface 11 and a recovery device 12.
Detailed Description
The following further description of the present invention will be made with reference to the accompanying drawings, and the following description of the embodiments will help the public to understand the present invention, but the specific embodiments given by the applicant should not be construed as limiting the technical solution of the present invention, and any changes in the definition of the components or technical features or in the form of the overall structure rather than the essential changes should be construed as the protection scope defined by the technical solution of the present invention.
As shown in figure 1, the heavy metal detection sample pretreatment workbench comprises a microwave digestion instrument, wherein a detachable disc-shaped sample placing disc is arranged inside the microwave digestion instrument, 6 positions for placing digestion tanks are arranged on the detachable disc-shaped sample placing disc, a door opening and closing device for opening and closing a door body of the microwave digestion instrument is arranged at the top of the microwave digestion instrument and is used for controlling the opening and closing of the microwave digestion instrument, the door opening and closing requirements in the automatic sample treatment process are met, the sample pretreatment workbench further comprises a sample adding device for adding samples into the digestion tanks, a reagent adding device for adding reagents into the samples, a first mechanical arm for moving the sample placing disc and the digestion tanks, and a second mechanical arm for setting parameters of the microwave digestion instrument, and weighing devices capable of calculating weight are arranged below the sample adding device and the reagent adding device, finding out the initial position location of the sample placing disc, taking out and placing the 1 st position digestion tank in the sample placing disc on the weighing device, wherein the 6 digestion tanks of the sample placing disc are positioned on the same circumference, when the initial position is reached, the sample adding device and the reagent adding device are positioned on the two adjacent digestion tank placing positions, the weights of the sample and the reagent added in the digestion tanks are specified, when the weights reach a preset value, the sample placing disc is rotated by a manipulator to carry out the next digestion tank addition until the addition is completed, the sample pretreatment workbench further comprises an acid dispelling device and an acid dispelling workbench, the acid dispelling device is used for dispelling the toxic and harmful gas and unreacted acid generated after digestion, and finally the dispelled gas and acid are collected and recovered to avoid causing adverse effects on the environment, and the microwave digestion instrument, the sample adding device and the reagent adding device are used for adding the reagent, The first mechanical arm, the second mechanical arm, the weighing device, the acid removing device and the acid removing workbench are all arranged in the glass chamber, so that toxic and harmful gases generated in the sample pretreatment process are prevented from damaging human bodies, a plurality of ventilation devices are arranged on the side surface of the glass chamber and can exhaust bad gases, and a control operation interface is arranged outside the glass chamber and used for corresponding setting and control of external test operators; the door opening and closing device comprises a hydraulic cylinder and a door opening and closing controller, the hydraulic cylinder is used for directly opening and closing the digestion instrument, and the door opening and closing controller starts to work when the door needs to be opened and controls the hydraulic cylinder to work; two supporting points of the hydraulic cylinder are respectively fixed on a door body and a machine body of the microwave digestion instrument, the supporting points can rotate relative to the microwave digestion instrument, and the door opening and closing controller can be controlled through the control operation interface; the weighing device comprises a weight sensor, the weighing device is mainly used for controlling the weight of an added sample and the weight of a reagent, the weight of the added sample and the weight of the reagent reach preset values through the weight sensor, and then the first mechanical arm is controlled to enable the sample placing disc to rotate to the next position, and sample adding work is carried out on the next digestion tank; the acid removing device comprises a pipe leading to the outside of the glass chamber, a fan arranged at a pipe orifice at the indoor end and a recovery device arranged at an orifice at the outside of the chamber, the fan device is used for sucking volatilized acid and generated toxic and harmful gases in the sample reagent into a pipeline, and then the recovery device is used for recovering the volatilized acid and the generated toxic and harmful gases; the flow direction of wind in the pipe flows from the inside of the glass chamber to the outside of the glass chamber, and acid and toxic and harmful gas are driven out of the glass chamber; the reagent adding device comprises a funnel-shaped reagent containing tool for containing the reagent and an electric valve which is positioned at the bottom of the reagent containing tool and is used for controlling the weight of the reagent, so that the accurate control of the weight of the reagent is realized; the sample adding device comprises a funnel-shaped sample containing tool for containing a sample and an electric valve used for controlling the amount of the reagent at the bottom of the funnel, and the accurate control of the weight of the sample is realized.
A heavy metal detection sample pretreatment workbench is characterized in that when the workbench is used, a door opening and closing device is controlled to open a door of a microwave digestion instrument, a No. 1 digestion tank on a sample placing plate is taken out and placed on a weighing device by a first mechanical arm, the position of the first mechanical arm limits the position of the first mechanical arm, but the weighing device does not generate weight, a sample adding device and a reagent adding device are adjacently positioned on the digestion tank, the sample adding device and the reagent adding device are controlled to add samples and reagents into the digestion tank, the No. 1 digestion tank is sent to a corresponding position in the sample placing plate of the microwave digestion instrument by the first mechanical arm after the addition is completed, the sample placing plate is rotated by the mechanical arm, the No. 2 to No. 6 digestion tanks are sequentially added according to the same method, the door opening and closing device closes the instrument door, and various parameters on the microwave digestion instrument are set by controlling a second mechanical arm, the microwave digestion instrument is started, after digestion is completed, the sample placing disc is taken out by the first mechanical arm and placed on the acid dispelling workbench, the acid dispelling device is controlled to be started, the acid dispelling procedure is completed, the sample pretreatment is completed, and the ventilation device continuously works in the treatment process.
In this embodiment, a heavy metal detects sample pretreatment workstation, this workstation adopts robotic arm to replace the people operation, the advantage that has the accuracy height, degree of automation is high, can effectively reduce the human cost, improve work efficiency, the experimenter need not direct contact sample, experimental materials such as reagent and instrument and equipment such as microwave digestion appearance, harmful substance pair production injury to the human body is produced to the harmful substance pair of avoiding sample pretreatment in-process production, can retrieve strong acid and poisonous and harmful gas in the sample, avoid causing the pollution to the environment, accord with the trend of pursuing green development at present.
Of course, the present invention can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.
Claims (8)
1. The utility model provides a heavy metal detects sample pretreatment workstation, its characterized in that, including inside microwave digestion appearance (1) that can dismantle discoid sample placing tray that is equipped with, the microwave digestion appearance top is equipped with the switch door gear of opening and closing the microwave digestion appearance door body, sample pretreatment workstation is still including sample interpolation device (2) that are arranged in adding the sample toward digesting the jar, the reagent that is arranged in adding the reagent adds device (3) toward the sample, be used for removing sample placing tray and digesting jar first robotic arm (4) and be used for setting up microwave digestion appearance each parameter second robotic arm (5), be equipped with below sample interpolation device and the reagent interpolation device and can calculate weighing device (6) of weight, sample pretreatment workstation is still including catching up with sour device (7) and catching up with sour workstation (8), the microwave digestion appearance, The sample adding device, the reagent adding device, the first mechanical arm, the second mechanical arm, the weighing device, the acid removing device and the acid removing workbench are all arranged in a glass chamber (9), a plurality of ventilation devices (10) are arranged on the side face of the glass chamber, and a control operation interface (11) is arranged outside the glass chamber.
2. The heavy metal detection sample pretreatment workbench according to claim 1, wherein said door opening and closing device comprises a hydraulic cylinder and a door opening and closing controller.
3. The heavy metal detection sample pretreatment workbench according to claim 2, wherein two fulcrums of the hydraulic cylinder are respectively fixed on a door body and a machine body of the microwave digestion instrument, the fulcrums can rotate relative to the microwave digestion instrument, and the door opening and closing controller can be controlled through the control operation interface.
4. The heavy metal detection sample pretreatment workbench according to claim 1, wherein the weighing device comprises a weight sensor, the weight of the added sample and the reagent is transmitted to the weight sensor, the sample addition is stopped when a predetermined set value is reached, then the first mechanical arm is controlled to place the digestion tank in the corresponding position of the sample placement tray, the sample placement tray is rotated by the mechanical arm, and the sample addition work is performed on the next digestion tank.
5. The heavy metal detection sample pretreatment workbench according to claim 1, wherein the acid removing device comprises a pipe leading to the outside of the glass chamber, a fan installed at the pipe opening at the indoor end, and a recovery device (12) at the pipe opening at the outdoor end.
6. The heavy metal detection sample pretreatment workbench according to claim 5, wherein the wind in the tube flows from the glass chamber to the outside of the glass chamber, so as to expel the acid and toxic and harmful gases out of the glass chamber.
7. The heavy metal detection sample pretreatment workbench according to claim 1, wherein the reagent adding device comprises a funnel-shaped reagent containing tool for containing a reagent and an electric valve located at the bottom of the reagent containing tool for controlling the weight of the reagent.
8. The heavy metal detection sample pretreatment workbench according to claim 1, wherein the sample adding device comprises a funnel-shaped sample holding tool for holding samples and an electric valve at the bottom of the funnel for controlling the weight of the samples.
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| CN201921476036.1U CN211274727U (en) | 2019-09-06 | 2019-09-06 | Heavy metal detection sample pretreatment workbench |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110560196A (en) * | 2019-09-06 | 2019-12-13 | 中国计量大学 | Heavy metal detection sample pretreatment workbench |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110560196A (en) * | 2019-09-06 | 2019-12-13 | 中国计量大学 | Heavy metal detection sample pretreatment workbench |
| CN110560196B (en) * | 2019-09-06 | 2024-07-26 | 中国计量大学 | Heavy metal detection sample pretreatment workbench |
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