A soil heavy metal digestion device

Abstract

The utility model relates to the field of digestion technology, in particular to a soil heavy metal digestion device, comprising a shell, a water bath is arranged in the shell, a jacket is arranged on the periphery of the water bath, a plurality of ultrasonic transducers are arranged between the bottom of the front and rear sides of the water bath and the jacket, cooling fins corresponding to the ultrasonic transducers are arranged on the front and rear outer walls of the jacket, air inlets and air outlets are respectively opened on the two side walls of the box, cooling fans and exhaust fans are respectively arranged in the air inlet and air outlet, and dustproof nets are respectively arranged at the air inlet and air outlet; a sample placement rack is arranged in the water bath, the sample placement rack comprises a perforated plate and legs arranged on both sides of the bottom of the perforated plate, and the legs and the perforated plate, as well as the legs and the inner wall of the water bath can be detachably connected. The utility model has the advantages of increasing the service life of the device, increasing the digestion efficiency, being convenient to operate, easy to use, and ensuring the safety of operators.

Description

Technical Field

[0001] The utility model relates to the technical field of digestion, in particular to a soil heavy metal digestion device. Background Art

[0002] In recent years, heavy metal pollution incidents in soil have occurred frequently, soil pollution investigation tasks have increased, and the environmental quality of soil has also received much attention. Rapid and accurate determination of the content of heavy metals in soil is of great significance. The key step in detecting metal elements in soil is the pretreatment of soil samples, and there are many pretreatment methods for soil sample digestion, mainly microwave digestion, water bath digestion, hot plate wet digestion, graphite digestion, etc.

[0003] The water bath equipment used in the existing water bath digestion method is simple, easy to operate, uses a small amount of glass consumables, is not prone to cross contamination, and is suitable for large-scale sample analysis, but the steps are also cumbersome, requiring multiple shaking of the sample, which is time-consuming. In order to simplify the operating steps and shorten the water bath digestion time, some studies have used ultrasonic cleaning machines for water bath digestion, hoping to accelerate the dissolution of metal elements from soil samples through ultrasonic vibration. However, continuous water bath ultrasonic digestion will cause the ultrasonic transducer and the internal circuit board of the display to overheat, reducing the service life of the ultrasonic cleaning machine, and the water bath temperature of the ultrasonic cleaning machine is generally set at 60-70°C (overheating will damage the ultrasonic transducer). The low water bath temperature prolongs the digestion time and reduces the digestion effect. Utility Model Content

[0004] In order to solve the above technical problems, the utility model specifically adopts the following technical solutions.

[0005] A soil heavy metal digestion device is designed, comprising a shell, a water bath is arranged in the shell, a jacket is arranged on the periphery of the water bath, a plurality of ultrasonic transducers are arranged between the bottom of the front and rear sides of the water bath and the jacket, heat dissipation fins corresponding to the ultrasonic transducers are arranged on the front and rear outer walls of the jacket, an air inlet and an air outlet are respectively opened on the two side walls of the box, a heat dissipation fan and an exhaust fan are respectively arranged in the air inlet and the air outlet, and dust screens are respectively arranged at the air inlet and the air outlet;

[0006] A sample placement rack is arranged in the water bath, and the sample placement rack comprises a hole plate and legs arranged on both sides of the bottom of the hole plate. The legs and the hole plate, as well as the legs and the inner wall of the water bath can be detachably connected.

[0007] Preferably, fixing sleeves are respectively provided on both sides of the bottom of the orifice plate, spring jumping beans are respectively provided above both sides of the legs, mounting holes corresponding to the spring jumping beans are provided on the fixing sleeves, the tops of the legs are inserted into the fixing sleeves, and the two are fixed in the mounting holes by the spring jumping beans.

[0008] Preferably, slots are respectively provided on the inner walls on both sides of the water bath, and a clamping rod matching the slots is connected to the side of the leg opposite to the water bath, and one end of the clamping rod is clamped in the slot.

[0009] Preferably, moving blocks are connected to the outer walls on both sides of the jacket respectively, connecting plates are provided at the upper and lower ends of the inner walls on both sides of the shell respectively, a guide rod is connected between the two connecting plates on the same side, and the guide rod is movably arranged on the moving blocks.

[0010] Preferably, it also includes a control panel arranged on one side of the shell and a temperature sensor arranged below one side of the water bath pot, the control panel is provided with a display and control buttons, and the temperature sensor and the heating mechanism on the water bath pot are connected to the control mainboard inside the control panel.

[0011] The beneficial effects of the utility model are:

[0012] The utility model disposes the ultrasonic transducer between the jacket and the water bath, and expands the heat dissipation area through the heat dissipation fins on the jacket corresponding to the ultrasonic transducer, and then discharges the heat generated on the heat dissipation fins from the air outlet through the heat dissipation fan and the exhaust fan at the air inlet and the air outlet, thereby realizing the heat dissipation of the ultrasonic transducer, thereby solving the problem of excessively high internal temperature caused by continuous operation of the ultrasonic transducer, and thus greatly improving the service life of the device.

[0013] The utility model arranges a detachable sample placement rack in the water bath, so that the fixing sleeve at the bottom of the orifice plate is plugged into the top of the leg and fixed through spring jumping beans. The above fixing method makes the disassembly and assembly of the orifice plate and the leg more convenient, so that it is easier to replace the orifice plate for sample test tubes of different specifications, thereby avoiding cumbersome operation steps and reducing digestion efficiency. Moreover, the leg and the orifice plate are fixed in the water bath by the cooperation of the clamping rod and the clamping groove. As the orifice plate is taken out, the clamping rod and the leg can also be disassembled together. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the jacket and the water bath;

[0016] Figure 3 It is a schematic diagram of the structure of the sample placement rack;

[0017] The numbers in the figure are: 1 shell, 2 connecting plate, 3 jacket, 4 cooling fins, 5 shear frame, 6 moving block, 7 guide rod, 8 control panel, 9 air inlet, 10 cooling fan, 11 dust net, 12 drive motor, 13 bidirectional threaded rod, 14 slider, 15 slide, 16 air outlet, 17 exhaust fan, 18 water bath, 19 ultrasonic transducer, 20 fixed sleeve, 21 slot, 22 clamping rod, 23 leg, 24 spring jumping beans, 25 temperature sensor, 26 orifice plate. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example

[0019] A soil heavy metal digestion device, such as Figures 1 to 3 As shown, it includes a shell 1, a water bath 18 is arranged in the shell 1, a jacket 3 is arranged on the periphery of the water bath 18, a plurality of ultrasonic transducers 19 are arranged between the bottom of the front and rear sides of the water bath 18 and the jacket 3, and heat dissipation fins 4 corresponding to the ultrasonic transducers 19 are arranged on the front and rear outer walls of the jacket 3, respectively. The plurality of heat dissipation fins 4 are used to expand the heat dissipation area of ​​the ultrasonic transducer 19, thereby accelerating the heat dissipation of the ultrasonic transducer 19 and avoiding the problem of excessive internal temperature of the ultrasonic transducer 19 caused by continuous operation of the ultrasonic transducer 19. An air inlet 9 and an air outlet 16 are respectively provided on the two side walls, and the air inlet 9 and the air outlet 16 respectively correspond to the positions of the heat dissipation fins 4 when the water bath 18 is working. A heat dissipation fan 10 and an exhaust fan 17 are respectively provided in the air inlet 9 and the air outlet 16. The heat dissipation fan 10 draws external cold air into the shell 1, and the cold air is blown onto the heat dissipation fins 4. The hot air in the shell 1 is blown away through the air outlet 9 by the exhaust fan 19. Dustproof nets 11 are respectively provided at the air inlet 9 and the air outlet 16; the dustproof net 11 can prevent external dust and impurities from entering the interior of the shell 1.

[0020] It also includes a control panel 8 disposed on one side of the housing 1 and a temperature sensor 25 disposed below one side of the water bath 18. The control panel 8 is provided with a display and control buttons. The temperature sensor 25 and the heating mechanism on the water bath 18 are both connected to the control main board inside the control panel 8. The digestion temperature in the water bath 18 can be monitored at all times through the temperature sensor 25. According to different samples, the water bath temperature of the water bath 18 can be set through the control panel 8. When the temperature in the water bath 18 exceeds or is lower than the set temperature, the heating mechanism of the water bath 18 is controlled by the control circuit, thereby realizing automatic adjustment of the temperature of the water bath 18 to meet the use requirements.

[0021] A sample rack is provided in the water bath 18, and the sample rack includes a perforated plate 26 and legs 23 provided on both sides of the bottom of the perforated plate 26, and the legs 23 and the perforated plate 26, and the legs 23 and the inner wall of the water bath 18 are detachably connected. During digestion, the sample test tube is placed in the jack of the perforated plate 26.

[0022] When the specifications of the sample test tubes are different, the orifice plate 26 needs to be replaced. In order to facilitate the replacement of orifice plates 26 of different diameters to adapt them to the specifications of the sample test tubes, fixed sleeves 20 are respectively provided on both sides of the bottom of the orifice plate 26, and spring jumping beans 24 are respectively provided on the upper sides of the legs 23. The fixed sleeves 20 are provided with mounting holes corresponding to the spring jumping beans 24, and the top of the legs 23 is inserted into the fixed sleeves 20. The two are fixed in the mounting holes by the spring jumping beans 24. When the orifice plate 26 needs to be replaced, the orifice plate 26 can be removed from the legs 23 by pressing the spring jumping beans 24 and pulling the orifice plate 26 upwards; when installing, the fixed sleeve 20 at the bottom of the new orifice plate 26 is directly inserted into the top of the legs 23, and the spring jumping beans 24 automatically clamp the fixed sleeve 20, so that the installation of the orifice plate 26 can be realized. The above setting method makes the disassembly and assembly of the orifice plate 26 more convenient, thereby avoiding the complexity of the orifice plate replacement process when different test tube samples are digested.

[0023] Slots 21 are provided on the inner walls of both sides of the water bath 18, and a clamping rod 22 matching the slots 21 is connected to the side of the leg 23 opposite to the water bath 18, and one end of the clamping rod 22 is clamped in the slot 21. Through the cooperation between the slots 21 and the clamping rod 22, when the orifice plate 26 is removed, the clamping rod 22 together with the leg 23 can be taken out of the water bath 18, which can facilitate the disassembly and assembly of the leg 23.

[0024] In order to make the water bath 18 more stable when it is raised and lowered, moving blocks 6 are connected to the outer walls on both sides of the jacket 3, and connecting plates 2 are provided at the upper and lower ends of the inner walls on both sides of the shell 1, and a guide rod 7 is connected between the two connecting plates 2 on the same side, and the guide rod 7 is movably inserted into the moving block 6.

[0025] When the utility model is used, firstly, a suitable orifice plate is selected and installed on the top of the support leg 23, then the sample test tube is placed in the installation hole of the orifice plate 26, and then the sample is lowered to the air inlet 16 and the air outlet 9 inside the shell 1 to ensure the safety of the experimenter, so that the water bath 3 works to digest the heavy metal samples in the soil, and at the same time, the heat emitted by the ultrasonic transducer 19 is transferred to the heat dissipation fins 4, and then the heat dissipation fan 19 blows the external cold air to the heat dissipation fins 4, and the heat is discharged through the exhaust fan 10, thereby achieving the purpose of heat dissipation of the ultrasonic transducer 19.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soil heavy metal digestion device, characterized in that: The invention comprises a shell (1), a water bath (18) is arranged in the shell (1), a jacket (3) is arranged on the periphery of the water bath (18), a plurality of ultrasonic transducers (19) are arranged between the bottom of the front and rear sides of the water bath (18) and the jacket (3), cooling fins (4) corresponding to the ultrasonic transducers (19) are arranged on the front and rear outer walls of the jacket (3), an air inlet (9) and an air outlet (16) are respectively opened on the two side walls of the shell (1), a cooling fan (10) and an exhaust fan (17) are respectively arranged in the air inlet (9) and the air outlet (16), and a dust screen (11) is respectively arranged at the air inlet (9) and the air outlet (16); A sample placement rack is provided in the water bath (18), the sample placement rack comprising a perforated plate (26) and legs (23) provided on both sides of the bottom of the perforated plate (26), the legs (23) and the perforated plate (26), as well as the legs (23) and the inner wall of the water bath (18) being detachably connected.

2. The soil heavy metal digestion device according to claim 1, characterized in that: Fixed sleeves (20) are provided on both sides of the bottom of the orifice plate (26), and spring jumping beans (24) are provided above both sides of the support legs (23). The fixed sleeves (20) are provided with mounting holes corresponding to the spring jumping beans (24). The tops of the support legs (23) are inserted into the fixed sleeves (20), and the two are fixed in the mounting holes by the spring jumping beans (24).

3. The soil heavy metal digestion device according to claim 2, characterized in that: Slots (21) are respectively provided on the inner walls of both sides of the water bath (18), and a clamping rod (22) matching the slots (21) is connected to the side of the support leg (23) opposite to the water bath (18), and one end of the clamping rod (22) is clamped in the slot (21).

4. The soil heavy metal digestion device according to claim 1, characterized in that: Movable blocks (6) are respectively connected to the outer walls on both sides of the jacket (3), connecting plates (2) are respectively provided at the upper and lower ends of the inner walls on both sides of the shell (1), a guide rod (7) is connected between the two connecting plates (2) on the same side, and the guide rod (7) is movably inserted into the movable blocks (6).

5. The soil heavy metal digestion device according to claim 1, characterized in that: It also includes a control panel (8) arranged on one side of the housing (1) and a temperature sensor (25) arranged below one side of the water bath (18); the control panel (8) is provided with a display and control buttons; the temperature sensor (25) and the heating mechanism on the water bath (18) are connected to a control mainboard inside the control panel (8).

Images