Soil free iron test pretreatment device

Abstract

The utility model discloses a pretreatment device for testing free iron in soil, which relates to the technical field of experimental equipment and is used for performing water bath heating on a solution in a test tube placed in a water bath box, a magnetic stirring mechanism for stirring the solution is arranged in the water bath box, and the pretreatment device comprises a plurality of groups of water bath tanks arranged on the water bath box, the water bath box is provided with a plurality of groups of water bath tanks, so that the device can treat a plurality of samples at the same time, water in the whole water bath tanks does not need to be heated for treatment when the water bath box is used, the treatment efficiency is improved, the resource utilization rate is increased, and the water bath box is convenient to use. The water temperature in the inner barrel is controlled through the temperature controller, the heat preservation layers are arranged in the water bath tanks, the water temperature can be prevented from being greatly changed, the situation that the water temperatures in the adjacent water bath tanks are exchanged and the treatment result is affected can be prevented, and the magnetic stirring mechanisms are arranged in the water bath tanks, so that the magnetic rods stir the solution in the test tubes.

Description

Technical Field

[0001] The utility model relates to the field of experimental equipment, in particular to a pretreatment device for soil free iron testing. Background Technique

[0002] The formation of free iron in soil is related to climatic conditions. It is the main carrier of variable positive and negative charges in soil, has a specific adsorption function for heavy metal ions and polyvalent oxyacid radicals, restricts their activity in soil. Among them, free iron is also an important mineral cementing substance in soil, plays a connecting role in the formation of soil structure, and reflects the soil-forming conditions and environment to a certain extent.

[0003] The current testing of free iron in soil mainly adopts the DCB extraction - phenanthroline colorimetric method. This method requires putting the sample into a test tube for water bath heating. During this process, solid sodium dithionite, sodium citrate and sodium bicarbonate solution need to be added into the test tube to reduce the high-valent iron in the sample to low-valent iron. Then, phenanthroline solution is added into the test tube and mixed evenly. At this time, a spectrophotometer can be used for colorimetric operation. Before using this method, the sample needs to be placed in a water bath preheated to 90 - 95 °C, and the solution temperature needs to be maintained at 80 °C. During this period, solid sodium dithionite needs to be added and continuously stirred for 15 minutes, and the whole process needs to be repeated more than once.

[0004] However, the process is relatively difficult to operate, and it is not easy to control the temperature and continuously stir the solution to make it react fully. Moreover, the existing device cannot process multiple samples simultaneously, which easily affects the detection efficiency. If the number of samples to be processed is small, the water in the entire water bath tank needs to be heated for processing, resulting in reduced heating efficiency, increased processing time, and waste of resources. Summary of the Utility Model

[0005] Aiming at the above problems, a pretreatment device for soil free iron testing is provided, which solves the problem of inability to process multiple samples simultaneously and affecting the detection efficiency by setting multiple water bath tanks.

[0006] To solve the problems of the existing technology, the utility model provides a pretreatment device for soil free iron testing, which is used for water bath heating of the solution in the test tube placed in the water bath box. A magnetic stirring mechanism for stirring the solution is provided in the water bath box, including multiple groups of water bath tanks opened on the water bath box. Each group of water bath tanks is provided with an inner cylinder for placing the test tube, and a water bath treatment mechanism for heating the water in the inner cylinder is provided outside the inner cylinder.

[0007] Preferably, the water bath treatment mechanism includes a heating component for heating the water in the inner cylinder and a heat preservation component for preventing the temperature exchange between the inside and outside of the inner cylinder.

[0008] Preferably, the heating component includes a heating coil which is wound around the outer side of the inner cylinder.

[0009] Preferably, the heat preservation component includes a heat preservation layer which is arranged on the inner wall of the water bath tank, and an insulating heat preservation material is also coated on the inner wall of the water bath tank.

[0010] Preferably, a temperature sensor is arranged at the bottom inside the inner cylinder.

[0011] Preferably, the inner wall of the inner cylinder is arranged as an inclined plane.

[0012] Preferably, a cover plate is hinged to the upper end of one side of each water bath tank.

[0013] Preferably, the magnetic stirring mechanism includes a motor installed at the bottom of the water bath tank. A disk is arranged at the output end of the motor, and a magnetic bar cooperating with the disk is placed inside the test tube.

[0014] The beneficial effects of the present utility model compared with the prior art are as follows:

[0015] 1. By arranging multiple groups of water bath tanks on the water bath box, the device of the present utility model can process multiple samples simultaneously. When in use, it is not necessary to heat the water in the whole water bath tank for processing, which improves the processing efficiency, saves the processing time, and improves the resource utilization rate.

[0016] 2. By controlling the water temperature inside the inner cylinder through a temperature controller and arranging a heat preservation layer in the water bath tank, the present utility model can prevent large changes in the water temperature and also prevent the exchange of water temperatures in adjacent water bath tanks, thus affecting the processing results.

[0017] 3. By arranging a magnetic stirring mechanism in the water bath tank, the present utility model enables the motor to control the rotation of the rotating disk and drive the magnet thereon to generate a rotating magnetic field. Due to the action of the magnetic field, the magnetic bar inside the test tube will be affected by the magnetic force and start to rotate, so that the magnetic bar stirs the solution inside the test tube, thereby realizing the uniform heating and mixing of the solution and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of a pre-treatment device for soil free iron test.

[0019] Figure 2 is a three-dimensional structural schematic diagram of the water bath box of a pre-treatment device for soil free iron test.

[0020] Figure 3 is a sectional three-dimensional structural schematic diagram of a pre-treatment device for soil free iron test.

[0021] Figure 4It is a three-dimensional structural schematic diagram of the heat insulation layer and the inner cylinder of a pre-treatment device for soil free iron testing.

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the motor, rotating disk, magnet and magnetic rod of a pre-treatment device for soil free iron testing.

[0023] The reference numerals in the figure are: 100, water bath box; 101, water bath tank; 102, fixing seat; 103, cover plate; 104, handle; 200, inner cylinder; 201, heat insulation layer; 202, heating coil; 203, drain pipe; 204, drain plug; 300, inlet; 301, positioning groove; 302, inclined plane; 303, temperature sensor; 304, test tube; 400, motor; 401, rotating disk; 402, magnet; 403, magnetic rod; 500, control panel; 501, temperature controller; 502, stirring controller; 503, control box; 504, power supply interface. Detailed implementation manners

[0024] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation manners.

[0025] See Figures 1 to 5 As shown, a pre-treatment device for soil free iron testing is used to perform water bath heating on the solution in the test tube 304 placed in the water bath box 100. A magnetic stirring mechanism for stirring the solution is provided in the water bath box 100, including multiple groups of water bath tanks 101 opened on the water bath box 100. An inner cylinder 200 for placing the test tube 304 is provided in each group of water bath tanks 101, and a water bath treatment mechanism for heating the water in the inner cylinder 200 is provided outside the inner cylinder 200.

[0026] See Figures 2 - 4As shown in the figure, the water bath treatment mechanism includes a heating component for heating the water in the inner cylinder 200 and a heat preservation component for preventing the temperature exchange between the inside and outside of the inner cylinder 200. The heating component includes a heating coil 202, which is wound around the outside of the inner cylinder 200. The heat preservation component includes a heat preservation layer 201, which is arranged on the inner wall of the water bath tank 101. The inner wall of the water bath tank 101 is also coated with an insulating and heat-preserving material. A control panel 500 is provided on the water bath box 100. A temperature controller 501 and a stirring controller 502 are provided on the control panel 500. The temperature controller 501 is electrically connected to the heating coil 202. A control box 503 is provided inside the water bath box 100. A power supply interface 504 for connecting to the power supply is provided on the control box 503. When in use, first connect the power supply interface 504 to the power socket to ensure that the device obtains power supply, then turn on the power switch to start the water bath treatment mechanism, and then use the temperature controller 501 to set the required water temperature. At this time, the heating coil 202 starts to heat the water in the inner cylinder 200. The heat preservation layer 201 outside the inner cylinder 200 can prevent the water temperature from changing greatly and can also prevent the water temperature inside the inner cylinder 200 in adjacent water bath tanks 101 from exchanging, affecting the treatment result.

[0027] See Figure 3 As shown in the figure, a temperature sensor 303 is provided at the bottom inside the inner cylinder 200. The temperature sensor 303 can transmit the water temperature inside the inner cylinder 200 to the inside of the control panel 500. The staff can monitor the change of the water temperature through the temperature display on the control panel 500. If the temperature needs to be adjusted, it can be adjusted through the temperature controller 501.

[0028] See Figure 4 As shown in the figure, the inner wall of the inner cylinder 200 is set as an inclined surface 302. A drain pipe 203 is provided at the lower end of each inner cylinder 200. A drain plug 204 is provided at the end of the drain pipe 203. An inlet 300 for the test tube 304 to enter is provided at the upper end of the inner cylinder 200. A positioning groove 301 is provided at the bottom inside the inner cylinder 200. When in use, first ensure that the drain plug 204 is in the closed state to prevent water from leaking accidentally during heating or stirring. Then put the test tube 304 containing the solution to be treated into the inner cylinder 200 from the inlet 300, and then make the bottom of the test tube 304 enter the positioning groove 301 so that the test tube 304 is placed vertically in the inner cylinder 200, which is convenient for the subsequent use of the magnetic rod 403. During the treatment process, the water in the inner cylinder 200 will be heated to generate water vapor. Since the inner wall of the inner cylinder 200 is set as the inclined surface 302, the water vapor is blocked and thus re-condensed into water and then enters the inner cylinder 200 again. After the treatment is completed, open the drain plug 204 to drain the water in the inner cylinder 200 for cleaning.

[0029] See Figure 1As shown, a cover plate 103 is hinged to the upper end of one side of each water bath tank 101. A fixed seat 102 is provided at the upper end of one side of the water bath tank 101, and the cover plate 103 is hinged to the fixed seat 102. A handle 104 is provided on the cover plate 103. During use, the cover plate 103 can be opened through the handle 104, which is convenient for staff to add or take out liquids, samples, etc. into the inner cylinder 200.

[0030] See Figure 5 As shown, the magnetic stirring mechanism includes a motor 400 installed at the bottom of the water bath box 100. A disk is provided at the output end of the motor 400. A magnetic bar 403 that cooperates with the disk is placed in the test tube 304. The disk includes a rotating disk 401 and a magnet 402. The rotating disk 401 is arranged at the output end of the motor 400, and magnets 402 are provided circumferentially on the rotating disk 401. The motor 400 is electrically connected to a stirring controller 502 provided on the control panel 500. During use, the motor 400 is started through the stirring controller 502, so that the rotating disk 401 rotates and drives the magnets 402 thereon to generate a rotating magnetic field. Due to the action of the magnetic field, the magnetic bar 403 in the test tube 304 will be affected by the magnetic force and start to rotate. The rotation of the magnetic bar 403 will stir the solution in the test tube 304, thereby realizing the uniform heating and mixing of the solution.

[0031] The above embodiments disclose a pretreatment device for testing free iron in soil. When using this device, first connect the power interface 504 to a power socket to ensure that the device obtains power supply. Then turn on the power switch to start the water bath treatment mechanism. Also, ensure that the drain plug 204 is in the closed state to prevent accidental leakage of water during heating or stirring. Then, the cover plate 103 can be opened through the handle 104, facilitating the staff to put the test tube 304 containing the solution to be treated into the inner cylinder 200 from the inlet 300. Then, make the bottom of the test tube 304 enter the positioning groove 301, so that the test tube 304 is vertically placed in the inner cylinder 200. Then, use the temperature controller 501 to set the required water temperature. At this time, the heating coil 202 starts to heat the water in the inner cylinder 200. The heat preservation layer 201 outside the inner cylinder 200 can prevent large changes in the water temperature and also prevent the exchange of the water temperature inside the inner cylinder 200 in the adjacent water bath tank 101, affecting the treatment result. During the treatment process, the water in the inner cylinder 200 will be heated to generate water vapor. Since the inner wall of the inner cylinder 200 is set as the inclined surface 302, the water vapor is blocked and thus re-condensed into water and then enters the inner cylinder 200 again. If it is necessary to stir the solution in the test tube 304, first put the magnetic bar 403 into the test tube 304, and then start the motor 400 through the stirring controller 502, so that the rotating disk 401 rotates and drives the magnet 402 on it to generate a rotating magnetic field. Due to the action of the magnetic field, the magnetic bar 403 in the test tube 304 will be affected by the magnetic force and start to rotate. The rotation of the magnetic bar 403 will stir the solution in the test tube 304, thereby realizing uniform heating and mixing of the solution. After the treatment is completed, open the drain plug 204 to drain the water in the inner cylinder 200 for cleaning.

[0032] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A pre-treatment device for testing free iron in soil, which is used for water bath heating of the solution in a test tube (304) placed in a water bath tank (100). A magnetic stirring mechanism for stirring the solution is arranged in the water bath tank (100), and it is characterized in that, It includes multiple groups of water bath tanks (101) opened on a water bath box (100). An inner cylinder (200) for placing test tubes (304) is provided in each group of water bath tanks (101), and a water bath treatment mechanism for heating the water in the inner cylinder (200) is provided outside the inner cylinder (200).

2. The pretreatment device for testing free iron in soil according to claim 1, characterized in that, The water bath treatment mechanism includes a heating component for heating the water in the inner cylinder (200) and a heat preservation component for preventing the temperature exchange between the inside and outside of the inner cylinder (200).

3. The pretreatment device for testing free iron in soil according to claim 2, wherein, The heating component includes a heating coil (202), and the heating coil (202) is wound outside the inner cylinder (200).

4. The pretreatment device for soil free iron testing according to claim 2, characterized in that, The heat preservation component includes a heat preservation layer (201). The heat preservation layer (201) is arranged on the inner wall of the water bath tank (101), and an insulating heat preservation material is also coated on the inner wall of the water bath tank (101).

5. The pretreatment device for testing free iron in soil according to claim 1, characterized in that, A temperature sensor (303) is provided at the inner bottom of the inner cylinder (200).

6. The pretreatment device for testing free iron in soil according to claim 1, characterized in that, The inner wall of the inner cylinder (200) is set as an inclined plane (302).

7. The pretreatment device for testing free iron in soil according to claim 1, wherein, A cover plate (103) is hinged at the upper end of one side of each group of water bath tanks (101).

8. A pre-treatment device for soil free iron testing according to claim 1, characterized in that, The magnetic stirring mechanism includes a motor (400) installed at the bottom of the water bath box (100). A magnetic disk is provided at the output end of the motor (400), and a magnetic bar (403) matched with the magnetic disk is placed in the test tube (304).

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