A fully automatic oscillating digestion instrument

Abstract

The invention discloses a fully automatic oscillating digestion instrument, which relates to the technical field of oscillating digestion, and includes: an oscillating box, which is used to detect thallium in soil, sediment, solid waste, environmental water quality, industrial wastewater, ambient air and exhaust gas by inductively coupled plasma emission spectrometry; and a graphite digestion component, which is located on the inner side of the oscillating box. According to the invention, when clamping a translucent digestion tube storing heavier substances, the translucent digestion tube storing lighter substances is first placed on the end surface adjacent to the sample clamp and the pressing plate by using the clamping method, and then the screw is rotated to move to the left along the thread of the threaded hole, and the pressing plate is moved to the left with the screw, so that the movable hole at the top of one side of the pressing plate slowly moves to the left along the limit rod, and the right side of the clamped translucent digestion tube is stably pressed, so as to avoid the translucent digestion tube storing heavier substances being offset and unstable clamping due to the influence of oscillation.

Description

Technical Field

[0001] The invention relates to the technical field of oscillation digestion, in particular to a full-automatic oscillation digestion instrument. Background Art

[0002] The digester is a commonly used sample pretreatment equipment. According to the degree of automation, it can be divided into semi-automatic digesters and fully automatic digesters. According to the principle, it can be divided into electric thermal digesters and microwave digesters. Both have relatively mature products and are widely used.

[0003] In order to facilitate the digestion of materials, a reflux digester (see patent number: CN202122994543.8 for details) is provided for convenient cleaning of digestion bottles. The key point is that it includes a digester shell, a digester body is movably arranged in the digester shell, a plurality of condensers are inserted in the digester body, a height adjustment component fixedly connected to the digester body is fixedly connected to the digester shell, a sliding plate is horizontally slidably connected to the digester shell at the lower part of the digester body, a plurality of cleaning components for cleaning each digestion bottle are arranged at the bottom end of the sliding plate, and a heating plate for placing the digestion bottles is fixedly connected to the bottom end of the digester shell.

[0004] Before the existing digestion instrument performs oscillation digestion treatment, it is necessary to clamp the translucent digestion tube containing the sample in advance. However, the existing clamping mechanism has a relatively slow clamping speed when clamping the translucent digestion tube storing lighter substances. When clamping the translucent digestion tube storing heavier substances, the original clamping method is not applicable due to its heavy weight (it is easily affected by oscillation and deviates, resulting in unstable clamping), thereby reducing the utilization rate to a certain extent. Summary of the invention

[0005] The purpose of the present invention is to provide a fully automatic oscillating digestion instrument to solve the problem that the existing clamping mechanism has a relatively slow clamping rate when clamping a translucent digestion tube storing lighter substances, and the original clamping method is not applicable to translucent digestion tubes storing heavier substances due to their heavy weight (they are easily affected by vibration and deflected, resulting in unstable clamping), thereby reducing the utilization rate to a certain extent.

[0006] To achieve the above object, the present invention provides the following technical solution: a fully automatic oscillating digestion instrument, comprising:

[0007] Oscillating box for detecting thallium in soil, sediment, solid waste, ambient water, industrial wastewater, ambient air and exhaust gas by inductively coupled plasma emission spectrometry;

[0008] Graphite digestion assembly, located inside the oscillation box;

[0009] An electric telescopic rod, located on one side of one end of the oscillation box;

[0010] The movable assembly is located above the oscillation box;

[0011] A sample holding assembly is located at the bottom of the movable assembly and is detachably connected to the movable assembly;

[0012] Translucent digestion tube, used for temporary storage of samples;

[0013] The number of the sample clamping assemblies is fifteen groups, and the fifteen groups of sample clamping assemblies all include sample clamps, the bottom ends of the sample clamps are all provided with foam plastics, the bottom ends of one side of the sample clamps are all provided with threaded holes, one side of the sample clamps is movably connected with a pressure plate, the bottom of one end of one side of the pressure plate is provided with a socket, one end of the top of one side of the pressure plate is provided with a movable hole, one end of the top of one side of the sample clamp is provided with a limiting rod extending to one side of the movable hole, the outer side of the limiting rod is sleeved with an elastic part, the tops of the sample clamps and one end of the pressure plate are both provided with a clamping position, and one side of the pressure plate is provided with a screw extending to cooperate with the socket and the threaded hole.

[0014] As a further solution of the present invention: the graphite digestion assembly includes a graphite digestion box, and a plurality of groups of digestion holes are evenly arranged on the top of the graphite digestion box, and the number of the digestion holes is fifteen.

[0015] As a further solution of the present invention: the oscillation box includes a shell, and air holes are provided on one side of the shell and the inside of the graphite digestion box, and fans are installed on one side of the shell and the inside of the graphite digestion box near the air holes.

[0016] As a further solution of the present invention: the movable component includes a cover plate, a support is provided at one end of one side of the bottom of the cover plate, a motor is installed at the bottom of the support, and the motor is installed at the top of the electric telescopic rod.

[0017] As a further solution of the present invention: the top of the sample clamp is detachably connected to the bottom of the cover plate by bolts.

[0018] As a further solution of the present invention: both sides of the elastic member are respectively welded to the sample clamp and the adjacent end faces of the pressure plate through welding blocks.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By means of the oscillation box, graphite digestion component, movable component, sample clamping component, screw and translucent digestion tube, when in use, the translucent digestion tube storing the substance is directly placed on the top of the foam plastic on the side of a corresponding set of sample clamps, and the bottom of the translucent digestion tube is directly in contact with the foam plastic, and then the translucent digestion tube is slightly pressed downward to make the foam plastic squeezed and deformed by force, and then the limiting ring on the outside of the translucent digestion tube is moved to the corresponding clamping end face, and then the top of the translucent digestion tube is slightly pressed backward to make the limiting ring on the outside of the translucent digestion tube move to the inside of the clamping position, and at the same time, the pressure plate moves slightly to the left along the limiting rod under the action of the elastic member, and limits and squeezes the right side of the translucent digestion tube, and at the same time, the foam plastic generates an upward elastic squeezing force on the translucent digestion tube, so that the translucent The transparent digestion tube is firmly clamped on the end surface adjacent to the sample clamp and the pressure plate. This method is suitable for quickly clamping a translucent digestion tube storing lighter substances, and improves its clamping rate over a certain length. When clamping a translucent digestion tube storing heavier substances, first use the clamping method for the translucent digestion tube storing lighter substances to place it on the end surface adjacent to the sample clamp and the pressure plate, and then rotate the screw to move to the left along the thread of the threaded hole, and carry the pressure plate to move to the left, so that the movable hole at the top of one side of the pressure plate slowly moves to the left along the limit rod, and stably presses the right side of the clamped translucent digestion tube, thereby avoiding the translucent digestion tube storing heavier substances from being offset and unstable clamping due to vibration, and improving the utilization rate to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the translucent digestion tube of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the sample clamping assembly of the present invention.

[0024] In the figure: 1. Oscillation box; 101. Housing; 102. Air vent; 103. Fan; 2. Graphite digestion assembly; 201. Graphite digestion box; 202. Digestion hole; 3. Electric telescopic rod; 4. Movable assembly; 401. Cover plate; 402. Support column; 403. Motor; 5. Sample clamping assembly; 501. Sample clamp; 502. Foam plastic; 503. Threaded hole; 504. Limit rod; 505. Elastic part; 506. Pressure plate; 507. Movable hole; 508. Socket; 509. Position; 6. Screw; 7. Translucent digestion tube. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0027] See also Figures 1 to 3 In an embodiment of the present invention, a fully automatic oscillating digestion instrument comprises:

[0028] An oscillation box 1 is used for detecting thallium in soil, sediment, solid waste, environmental water quality, industrial wastewater, ambient air and exhaust gas by inductively coupled plasma emission spectrometry;

[0029] The graphite digestion component 2 is located inside the oscillation box 1;

[0030] An electric telescopic rod 3 is located on one side of one end of the oscillation box 1;

[0031] The movable component 4 is located above the oscillation box 1;

[0032] The sample holding component 5 is located at the bottom of the movable component 4 and is detachably connected to the movable component 4;

[0033] A translucent digestion tube 7, used for temporarily storing samples;

[0034] The number of the sample clamping components 5 is fifteen, and the fifteen groups of sample clamping components 5 all include a sample clamp 501, the bottom of the inside of the sample clamp 501 is provided with a foam plastic 502, the bottom position of one side of the sample clamp 501 is provided with a threaded hole 503, one side of the sample clamp 501 is movably connected with a pressing plate 506, the bottom of one end of one side of the pressing plate 506 is provided with a plug hole 508, one end of the top of one side of the pressing plate 506 is provided with a movable hole 507, one end of the top of one side of the sample clamp 501 is provided with a limit rod 504 extending to one side of the movable hole 507, the outer side of the limit rod 504 is sleeved with an elastic member 505, the top of the sample clamp 501 and one end of the pressing plate 506 are provided with a clamping position 509, and one side of the pressing plate 506 is provided with a screw 6 extending to cooperate with the plug hole 508 and the threaded hole 503.

[0035] The fully automatic oscillating digestion instrument comprises an oscillating box 1 (containing an air-cooling system, which is implemented by a fan 103), a graphite digestion component 2 (containing an air-cooling system, which is implemented by a fan 103), an electric telescopic rod 3, a sample clamping component 5, and a translucent digestion tube 7 (the end face of the translucent digestion tube 7 is provided with 100 ml and 50 ml scale lines), wherein the sample clamp 501 and the translucent digestion tube 7 are made of high-temperature resistant and corrosion-resistant Teflon material; the oscillating box 1, the graphite digestion component 2 (except the heating part), and the electric telescopic rod 3 are all made of corrosion-resistant stainless steel inside, with a Teflon coating on the surface, and a microcomputer is used to control the heating and cooling of the digestion module and the oscillation module, and the automatic lifting and lowering control of the electric telescopic rod 3.

[0036] Please refer to Figure 1 The graphite digestion assembly 2 includes a graphite digestion box 201, and a plurality of groups of digestion holes 202 are evenly arranged on the top of the graphite digestion box 201, and the number of the digestion holes 202 is fifteen.

[0037] Please refer to Figure 1 The oscillation box 1 includes a shell 101 , and air holes 102 are provided on one side of the shell 101 and the inside of the graphite digestion box 201 . A fan 103 is installed on one side of the shell 101 and the inside of the graphite digestion box 201 near the air holes 102 .

[0038] Please refer to Figure 1 The movable component 4 includes a cover plate 401 , a support column 402 is provided at one end of the bottom side of the cover plate 401 , a motor 403 is installed at the bottom of the support column 402 , and the motor 403 is installed at the top of the electric telescopic rod 3 .

[0039] Please refer to Figure 1 and 3 The top of the sample holder 501 is detachably connected to the bottom of the cover plate 401 by bolts.

[0040] Please refer to Figure 3 Both sides of the elastic member 505 are respectively welded to the adjacent end surfaces of the sample clamp 501 and the pressing plate 506 through welding blocks.

[0041] The working principle of the present invention is: the experimental process specifically includes the following steps: Step 1, different sample processing methods are different, 1. Soil sample: remove foreign matter (twigs, leaves, stones, etc.) in the sample, air-dry, crush, sieve 100 mesh, and quarter-divide the collected sample in the laboratory for later use; 2. Sediment sample: remove foreign matter (gravel and animal and plant remains, etc.) in the sample, place the collected sample in an oven at 80°C to 100°C for drying, crush the dry sample, sieve 100 mesh, quarter-divide the sample for later use; 3. Solid waste sample: the sample particles should be able to pass through a sieve with a pore size of 9.5 mm, and the particle size of large particles can be reduced by crushing, cutting or grinding; 4. Environmental water quality and industrial wastewater; 5. Soluble thallium sample: after the sample is collected, filter it with a 0.45 µm filter membrane, discard the initial filtrate, store the collected filtrate in a polyethylene bottle, and add 1 ml of 100 ml of filtrate Acidify with concentrated nitric acid and measure within 14 days; 6. Total thallium sample: add 10 ml concentrated nitric acid to acidify the sample immediately after collection, and the amount of acid can be increased for alkaline samples. The sample is stored in a polyethylene bottle and measured within 14 days; 7. Ambient air and exhaust gas: use ceramic scissors to cut the Ф90mm diameter glass fiber filter membrane or Ф28*70mm ultrafine glass fiber filter cartridge into small pieces for later use; Step 2, place the sample (0.2 g soil, 0.1 g sediment, 1 g solid waste; 10 ml water sample for environmental water quality and industrial wastewater; a whole glass fiber filter membrane that has been cut for ambient air; a superfine glass fiber filter cartridge that has been cut for exhaust gas) in a 100ml translucent digestion tube 7, add 8 ml nitric acid (ρ(HNO3)=1.42 g / ml), 10 ml hydrofluoric acid (ρ(HF)=1.49 g / ml) and 1 ml sulfuric acid (ρ(H2SO4)=1.84 g / ml), placed in the graphite digestion assembly 2, set the heating temperature to 280℃, maintain for 20min, ensure that the white smoke of sulfur trioxide is completely gone, then the air cooling system (blower 103) automatically starts, and automatically stops air cooling when the temperature drops to 30℃; Step 3, add 2.5 ml of hydrochloric acid (ρ(HC1)=1.19 g / ml) (1+1), start the temperature rise program of graphite digestion component 2, set to 280℃, maintain for 3 minutes, and dissolve the salts. Then add 1 ml of ferric chloride solution (24 g / L) and 2 ml of hydrogen peroxide (30%), turn on the air cooling system, and stop the air cooling automatically when the temperature drops to 30°C, and adjust the volume to 50 ml with distilled water; Step 4, fix the 1 cm*1 cm*2 cm foam plastic 502 on the sample holder 501 of the electric telescopic rod 3, turn on the electric telescopic rod 3, lower it to the bottom of the translucent digestion tube 7, turn on the oscillation box 1, and keep reciprocating oscillation for 30 minutes (30±2r / min). After 30 minutes, the oscillation will automatically stop and the electric telescopic rod 3 will be lifted. The electric telescopic rod 3 is rotated away from the top of the graphite digestion component 2, and the waste residue and acid on the foam plastic 502 are rinsed with distilled water, squeezed dry, and 15 bottles containing 5 ml of mixed reagent release solution (weigh 0.3 g of sulfuric acid trap, dissolve it in 100 ml of water, add 0.2 ml of sulfurous acid (1.03 g / ml) and 0.5g ascorbic acid, mix well, prepare when needed, ) colorimetric tube, turn the electric telescopic rod 3 again and place it just above the graphite digestion component 2, lower it, start the graphite digestion component 2 temperature rise program, set it to 180℃, keep it for 20 min, release thallium, and automatically start the cold air cooling system (blower 103) after 20 minutes. When the temperature drops to 30℃, the air cooling will automatically stop, and the electric telescopic rod 3 will be raised to take out the colorimetric tube containing the sample for testing; step five, turn on the inductively coupled plasma emission spectrometer, set the wavelength of the inductively coupled plasma emission spectrometer to 190.856nm, and the resolution to 0.004nm, introduce the standard solution into the emission spectrometer in turn for measurement, perform linear regression with concentration as the horizontal coordinate and element response intensity as the vertical coordinate, establish a calibration curve, and start analyzing the sample after the analysis signal is stable; in step two and step three, directly place the translucent digestion tube 7 storing the substance on the top of the foam plastic 502 on the side of the corresponding set of sample clamps 501, and make the bottom of the translucent digestion tube 7 directly contact with the foam plastic 502, then press the translucent digestion tube 7 slightly downward to make the foam plastic 502 squeezed and deformed, then move the limiting ring on the outside of the translucent digestion tube 7 to the corresponding end face of the clamping position 509, then press the top of the translucent digestion tube 7 slightly backward to make the limiting ring on the outside of the translucent digestion tube 7 move to the inner side of the clamping position 509, and at the same time, the pressure plate 506 moves slightly to the left along the limiting rod 504 under the action of the elastic member 505, and limits and squeezes the right side of the translucent digestion tube 7, and at the same time, the foam plastic 502 An upward elastic squeezing force is generated on the translucent digestion tube 7, so that the translucent digestion tube 7 is firmly clamped on the adjacent end faces of the sample clamp 501 and the pressing plate 506. This method is suitable for quickly clamping the translucent digestion tube 7 storing lighter substances, and improves its clamping rate over a certain length. When clamping the translucent digestion tube 7 storing heavier substances, first place it between the sample clamp 501 and the pressing plate 506 by using the clamping method for the translucent digestion tube 7 storing lighter substances. The end surface adjacent to the plate 506 is then rotated, so that the screw rod 6 moves leftward along the threaded hole 503, and carries the pressing plate 506 to move leftward, so that the movable hole 507 at the top of one side of the pressing plate 506 slowly moves leftward along the limiting rod 504, and stably presses the right side of the clamped translucent digestion tube 7, thereby avoiding the translucent digestion tube 7 storing heavier substances from being deviated due to the vibration and the phenomenon of unstable clamping, which improves the utilization rate to a certain extent.

[0042] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully automatic oscillating digestion apparatus, comprising: An oscillating box (1) is used for detecting thallium in soil, sediment, solid waste, environmental water quality, industrial wastewater, ambient air and exhaust gas by inductively coupled plasma emission spectrometry; A graphite digestion component (2) is located inside the oscillation box (1); An electric telescopic rod (3) located on one side of one end of the oscillation box (1); A movable component (4) is located above the oscillation box (1); A sample clamping assembly (5) is located at the bottom of the movable assembly (4) and is detachably connected to the movable assembly (4); A translucent digestion tube (7) for temporarily storing samples; The invention is characterized in that the number of the sample clamping components (5) is fifteen, and the fifteen groups of the sample clamping components (5) all include a sample clamp (501), the bottom of the inside of the sample clamp (501) is provided with a foam plastic (502), the bottom of one side of the sample clamp (501) is provided with a threaded hole (503), one side of the sample clamp (501) is movably connected to a pressure plate (506), the bottom of one end of one side of the pressure plate (506) is provided with a socket (508), and the pressure plate (5 06) A movable hole (507) is provided at one end of the top of one side, a limiting rod (504) extending to one side of the movable hole (507) is provided at one end of the top of one side of the sample clamp (501), an elastic member (505) is sleeved on the outer side of the limiting rod (504), a locking position (509) is provided at the top of one end of the sample clamp (501) and the pressing plate (506), and a screw (6) extending to cooperate with the insertion hole (508) and the threaded hole (503) is provided on one side of the pressing plate (506); The movable component (4) comprises a cover plate (401), a support column (402) is provided at one end of one side of the bottom of the cover plate (401), a motor (403) is installed at the bottom of the support column (402), and the motor (403) is installed at the top of the electric telescopic rod (3).

2. A fully automatic oscillating digestion instrument according to claim 1, characterized in that, The graphite digestion assembly (2) comprises a graphite digestion box (201), and a plurality of groups of digestion holes (202) are evenly arranged on the top of the graphite digestion box (201), and the number of the digestion holes (202) is fifteen.

3. A fully automatic oscillating digestion instrument according to claim 2, characterized in that, The oscillation box (1) comprises an outer shell (101), and one side of the inner part of the outer shell (101) and the graphite digestion box (201) are both provided with air holes (102).

4. A fully automatic oscillating digestion instrument according to claim 3, characterized in that, A fan (103) is installed on one side of the inner part of the housing (101) and the graphite digestion box (201) close to the air vent (102).

5. A fully automatic oscillating digestion instrument according to claim 1, characterized in that, The top of the sample clamp (501) is detachably connected to the bottom of the cover plate (401) via bolts.

6. A fully automatic oscillating digestion instrument according to claim 1, characterized in that, Both sides of the elastic member (505) are respectively welded to the adjacent end surfaces of the sample clamp (501) and the pressing plate (506) through welding blocks.

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