Graphite digestion instrument is matched with multifunctional integrated calibration digestion tube

Abstract

This invention relates to the field of digestion tube technology and provides a multi-functional integrated graduated digestion tube compatible with a graphite digester. The tube includes a base, with the digestion tube body connected to the top of the base. A stirring assembly is connected inside the digestion tube body, and a rotating cover is rotatably connected to the top of the stirring assembly. In this invention, the stirring rod is driven to rotate by a motor within the built-in stirring assembly, breaking the limitations of traditional static heating and ensuring full contact between the sample and strong acid / base reagents, avoiding localized carbonization or incomplete reactions. The design of the first vent on the rotating cover and the second vent on the connecting box allows for adjustment of the gas emission rate based on feedback from a pressure sensor. Combined with a fan design, this not only promptly removes nitrogen oxides and acid mist generated during digestion, preventing excessive pressure inside the tube from causing rupture, but also reduces reagent evaporation and loss, lowering the risk of laboratory environmental pollution.

Description

Technical Field

[0001] This utility model belongs to the field of digestion tube technology, and in particular relates to a multi-functional integrated graduated digestion tube adapted to a graphite digester. Background Technology

[0002] In fields such as environmental monitoring, food testing, pharmaceutical research and development, and materials analysis, the "digestion" step in sample pretreatment is a key step. It requires the destruction of the sample matrix through high temperature and strong acid and alkali conditions to convert the target analyte into a detectable homogeneous solution. Graphite digesters have become the mainstream digestion equipment due to their good heating uniformity, high temperature control accuracy, and strong batch processing capability.

[0003] Existing digestion tubes serve only as basic containers for holding samples and withstanding high temperatures. They are placed directly in the heating ports of the graphite digester for static heating. During digestion, the reaction between the sample and strong acid and base reagents relies on natural convection, which can easily lead to violent local reactions and slow overall digestion. Incomplete reaction may also result in incomplete release of the target substance, causing the test results to be lower and affecting the accuracy of the data. Therefore, it is necessary to adapt the graphite digester to a multi-functional integrated graduated digestion tube to solve the above problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a multi-functional integrated graduated digestion tube adapted to a graphite digestion instrument, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The graphite digester is compatible with a multi-functional integrated graduated digestion tube, including a base, the top of which is connected to the digestion tube body, the inside of which is connected to a stirring assembly, and the top of which is rotatably connected to a rotating cover.

[0007] The stirring assembly includes a connecting box, an insulation box connected to the top inner side of the connecting box, a motor connected inside the insulation box, a connecting shaft connected to the output end of the motor, a fan connected to the outer side of one end of the connecting shaft, a stirring rod connected to the outer side of the connecting shaft, a second ventilation opening on the top of the connecting box, a sealing plug connected to the bottom of the connecting box, and a temperature sensor and a pressure sensor embedded in the bottom of the sealing plug.

[0008] In a further technical solution, a locking block is connected to the bottom outer side of the connecting box, and a buffer pad is connected to the top of the digestion tube body through an opening groove. A slot is opened inside the buffer pad, and the locking block is connected to the slot. There are three locking blocks and three buffer pads.

[0009] In a further technical solution, the rotating cover is rotatably connected to the top of the connecting box, and a first ventilation opening is provided on the top of the rotating cover, with the first ventilation opening and a second ventilation opening communicating with each other.

[0010] In a further technical solution, a heat dissipation vent is provided in the middle of the top of the rotating cover, and the heat dissipation vent is connected through the top of the heat insulation box.

[0011] In a further technical solution, the top of the digestion tube body is connected to a sealing plug, the bottom of the sealing plug is connected to a ventilation mesh, the ventilation mesh is connected to a second ventilation port, and the fan is located between the second ventilation port and the ventilation mesh.

[0012] In a further technical solution, a heat-insulating sleeve is connected to the outside of the base, a positioning groove is provided at the bottom of the base, the bottom of the base is connected to the graphite digestion instrument, and the digestion tube body is made of transparent material.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention breaks through the limitations of traditional static heating by using a motor-driven stirring rod in the built-in stirring assembly to ensure full contact between the sample and strong acid and base reagents, avoiding local carbonization or incomplete reaction. The design of the first vent of the rotating cover and the second vent of the connecting box allows for adjustment of the gas emission rate based on feedback from the pressure sensor. Combined with the fan design, it can promptly expel nitrogen oxides and acid mist generated during digestion, preventing rupture due to excessive pressure inside the tube, while also reducing reagent volatilization loss and lowering the risk of laboratory environmental pollution.

[0015] In this invention, the motor drives the connecting shaft to rotate while simultaneously driving the fan to rotate, thereby quickly expelling the hot air inside the digestion tube and preventing the tube temperature from becoming too high, which would affect the use of the equipment. The temperature sensor embedded at the bottom of the sealing plug can monitor the temperature of the solution inside the tube in real time, forming a closed-loop control with the temperature control system of the graphite digester. This avoids deviations between the actual temperature and the set temperature due to matrix differences, ensuring that the digestion reaction takes place within the optimal temperature range.

[0016] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of this utility model;

[0018] Figure 2 This is a side view cross-sectional three-dimensional structural diagram of the main body of this utility model;

[0019] Figure 3This is a three-dimensional structural diagram of the stirring assembly of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the digestion tube body of this utility model;

[0021] Figure 5 This is the main body of the utility model. Figure 2 A magnified three-dimensional structural diagram of A in the middle.

[0022] In the diagram: 1. Base; 2. Digestion tube body; 3. Stirring assembly; 4. Rotating cover; 5. Heat insulation sleeve; 6. Heat dissipation vent; 7. First vent; 8. Positioning groove; 9. Locking block; 10. Ventilation mesh; 11. Locking slot; 12. Buffer pad; 301. Connecting box; 302. Heat insulation box; 303. Motor; 304. Connecting shaft; 305. Fan; 306. Stirring rod; 307. Second vent; 308. Sealing plug; 309. Temperature sensor; 310. Pressure sensor. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] like Figures 1-5 As shown, this utility model embodiment provides a multi-functional integrated graduated digestion tube adapted to a graphite digestion instrument, including a base 1, a digestion tube body 2 connected to the top of the base 1, a stirring assembly 3 connected inside the digestion tube body 2, and a rotating cover 4 rotatably connected to the top of the stirring assembly 3.

[0026] The stirring assembly 3 includes a connecting box 301, an insulation box 302 connected to the top inner side of the connecting box 301, a motor 303 connected inside the insulation box 302, a connecting shaft 304 connected to the output end of the motor 303, a fan 305 connected to the outer side of one end of the connecting shaft 304, a stirring rod 306 connected to the outer side of the connecting shaft 304, a second ventilation port 307 opened on the top of the connecting box 301, a sealing plug 308 connected to the bottom of the connecting box 301, and a temperature sensor 309 and a pressure sensor 310 embedded in the bottom of the sealing plug 308.

[0027] In this embodiment, the motor 303 in the stirring assembly 3 drives the connecting shaft 304 to rotate, which in turn drives the stirring rod 306 to rotate inside the digestion tube body 2, so that the sample and digestion reagent are fully mixed, breaking the limitations of traditional static heating and accelerating the reaction process. At the same time, when the motor 303 is working, it drives the fan 305 to rotate, forming an airflow circulation through the second vent 307 and the ventilation net 10, which assists the gas flow in the tube. The temperature sensor 309 at the bottom of the sealing plug 308 monitors the temperature of the solution in the tube in real time, and the pressure sensor 310 detects the gas pressure in the tube.

[0028] like Figure 3 , Figure 4 and Figure 5 As shown, specifically, a locking block 9 is connected to the bottom of the outer side of the connecting box 301, and a buffer pad 12 is connected to the top of the digestion tube body 2 through an opening groove. A locking slot 11 is opened inside the buffer pad 12, and the locking block 9 is connected to the locking slot 11. There are three locking blocks 9 and three buffer pads 12.

[0029] The rotating cover 4 is rotatably connected to the top of the connecting box 301. The top of the rotating cover 4 is provided with a first ventilation opening 7, which is connected to the second ventilation opening 307.

[0030] A heat dissipation vent 6 is provided in the middle of the top of the rotating cover 4, and the heat dissipation vent 6 is connected through to the top of the heat insulation box 302;

[0031] The top of the digestion tube body 2 is connected to the sealing plug 308, and the bottom of the sealing plug 308 is connected to the ventilation net 10. The ventilation net 10 is connected to the second ventilation port 307, and the fan 305 is located between the second ventilation port 307 and the ventilation net 10.

[0032] A heat-insulating sleeve 5 is connected to the outside of the base 1, and a positioning groove 8 is provided at the bottom of the base 1. The bottom of the base 1 is connected to the graphite digestion instrument, and the digestion tube body 2 is made of transparent material.

[0033] In this embodiment, the rotating cover 4 can rotate relative to the connecting box 301. By adjusting the communication area between the first vent 7 and the second vent 307, the gas emission rate can be controlled. When the pressure sensor 310 detects excessive pressure, the vent opening can be increased to accelerate exhaust. When it is necessary to reduce reagent evaporation, the opening can be decreased. The heat-insulating sleeve 5 on the outside of the base 1 can effectively insulate against high temperatures and prevent burns to operators. The tight connection between the sealing plug 308 and the digestion tube body 2, along with the ventilation mesh 10, can prevent acid leakage and filter some acid mist, protecting the health of the instrument and operators. The positioning groove 8 at the bottom of the base 1 can be precisely aligned with the heating holes of various graphite digestion instruments to ensure uniform heating. The three locking blocks 9 cooperate with the locking grooves 11 of the buffer pad 12 to realize the quick assembly and disassembly of the stirring component and the digestion tube body, which is convenient for later cleaning and maintenance. The base 1 is made of graphite composite material with high thermal conductivity. The positioning groove 8 at the bottom of the base 1 is fitted with the positioning protrusion in the heating hole of the digestion instrument to restrict the horizontal displacement of the digestion tube and ensure that the digestion tube body 2 is always in the center of the heating hole during the heating process, avoiding uneven local heating caused by displacement.

[0034] The working principle of this invention is as follows: First, the sample to be digested and the digestion reagent are added to the digestion tube body 2. The scale on the transparent tube wall is observed to ensure that the sample volume meets the experimental requirements. Through the cooperation of the locking block 9 and the locking groove 11, the stirring assembly 3 is installed on the digestion tube body 2, so that the sealing plug 308 fits tightly against the tube opening. Then, the motor 303 in the stirring assembly 3 drives the connecting shaft 304 to rotate, which drives the stirring rod 306 to rotate inside the digestion tube body 2, so that the sample and the digestion reagent are fully mixed, breaking the limitations of traditional static heating and accelerating the reaction process. At the same time, the motor 303... 03 During operation, the fan 305 rotates, forming an airflow circulation through the second vent 307 and the ventilation net 10 to assist the gas flow inside the tube. The temperature sensor 309 at the bottom of the sealing plug 308 monitors the temperature of the solution inside the tube in real time, and the pressure sensor 310 detects the gas pressure inside the tube. Finally, when the pressure sensor 310 detects that the pressure is too high, the rotating cover 4 can be rotated relative to the connecting box 301, which can adjust the communication area between the first vent 7 and the second vent 307. This can increase the opening of the vent to accelerate exhaust. When it is necessary to reduce reagent evaporation, the opening can be reduced.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A graphite digester adapted to a multi-functional integrated graduated digestion tube, including a base (1), characterized in that; The top of the base (1) is connected to the digestion tube body (2), the inside of the digestion tube body (2) is connected to the stirring assembly (3), and the top of the stirring assembly (3) is rotatably connected to the rotating cover (4). The stirring assembly (3) includes a connecting box (301), an insulation box (302) is connected to the top of the inner side of the connecting box (301), a motor (303) is connected inside the insulation box (302), a connecting shaft (304) is connected to the output end of the motor (303), a fan (305) is connected to the outer side of one end of the connecting shaft (304), a stirring rod (306) is connected to the outer side of the connecting shaft (304), a second ventilation port (307) is opened on the top of the connecting box (301), a sealing plug (308) is connected to the bottom of the connecting box (301), and a temperature sensor (309) and a pressure sensor (310) are embedded in the bottom of the sealing plug (308).

2. The graphite digester adapted with a multi-functional integrated graduated digestion tube according to claim 1, characterized in that: The bottom of the connecting box (301) is connected to a card block (9), and the top of the digestion tube body (2) is connected to a buffer pad (12) through a groove. The buffer pad (12) has a slot (11) inside. The card block (9) is connected to the slot (11). There are three card blocks (9) and three buffer pads (12).

3. The graphite digester adapted with a multi-functional integrated graduated digestion tube according to claim 1, characterized in that: The rotating cover (4) is rotatably connected to the top of the connecting box (301). The top of the rotating cover (4) is provided with a first ventilation opening (7), and the first ventilation opening (7) is connected to the second ventilation opening (307).

4. The graphite digester adapted with a multi-functional integrated graduated digestion tube according to claim 1, characterized in that: The rotating cover (4) has a heat dissipation vent (6) in the middle of its top, and the heat dissipation vent (6) is connected to the top of the heat insulation box (302).

5. The graphite digestion instrument adapted multifunctional integrated calibrated digestion tube according to claim 1, characterized in that: The top of the digestion tube body (2) is connected to the sealing plug (308), and the bottom of the sealing plug (308) is connected to the ventilation net (10). The ventilation net (10) is connected to the second ventilation port (307), and the fan (305) is located between the second ventilation port (307) and the ventilation net (10).

6. The graphite digestion instrument adapted multifunctional integrated calibrated digestion tube according to claim 1, characterized in that: The base (1) is connected to a heat-insulating sleeve (5) on the outside. The bottom of the base (1) is provided with a positioning groove (8). The bottom of the base (1) is connected to the graphite digestion instrument. The digestion tube body (2) is made of transparent material.

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