A thermostatic titration device for determining sodium indigo disulfonate in water

Abstract

This utility model relates to the field of constant temperature titration technology, specifically a constant temperature titration device for determining sodium indigo disulfonate in water. It includes a thermos jar, with supporting legs and a waste liquid tank at the bottom, a lid at the top, and a beaker for measurement inside. The thermos jar is filled with water that contacts the side wall of the beaker. Heating and cooling plates are respectively installed on opposite side walls of the thermos jar. There is a gap between the bottom of the beaker and the bottom of the thermos jar. A drain pipe penetrating the bottom of the thermos jar and communicating with the waste liquid tank is provided at the bottom of the beaker. An electrically controlled valve is installed on the drain pipe. A gear ring is mounted on the portion of the drain pipe inside the thermos jar via a bearing and bearing seat. Two opposing connecting plates are provided on the top of the gear ring. A stirring rod is provided at the end of the connecting plate away from the gear ring. A motor is provided at the bottom of the thermos jar, with the power output end of the motor located at the bottom inside the thermos jar.

Description

Technical Field

[0001] This utility model relates to the field of constant temperature titration technology, specifically a constant temperature titration device for determining sodium indigo disulfonate in water. Background Technology

[0002] The determination of sodium indigo disulfonate (IDS) in water currently adopts the "bleaching spectrophotometric method". The core of this method is to utilize the 1:1 blue bleaching reaction between IDS and ozone (or dissolved oxygen). This reaction is carried out at 16 ℃ ± 1 ℃. For every 1 ℃ increase in temperature, the bleaching rate increases by about 2.5%, resulting in higher results. Below 15 ℃, the reaction is incomplete, resulting in lower results.

[0003] Current laboratory practice involves placing the colorimetric tubes or beakers in a constant-temperature incubator before performing the titration test. However, some manufacturers' incubators have heating or cooling plates in fixed positions, causing temperature differences between the water closer to the heating or cooling plates and other parts of the water, which can affect the experimental results. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a constant temperature titration device for determining sodium indigo disulfonate in water. By starting the second motor, the gear at the power output end of the second motor can be driven to rotate. Since a gear ring is rotatably set on the drain pipe at the bottom of the beaker through a bearing and a bearing seat, and the gear ring meshes with the gear, the gear can drive the gear ring to rotate synchronously when it rotates. The connecting plate on the gear ring can drive the second stirring rod located between the inner wall of the insulated tank and the outer wall of the beaker to rotate, thereby stirring the water inside the insulated tank.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A constant-temperature titration apparatus for determining sodium indigo disulfonate in water includes an insulated container. The insulated container has supporting legs and a waste liquid container at its bottom, and a lid at its top. Inside the insulated container is a beaker for determination, filled with water that contacts the side wall of the beaker. Heating and cooling plates are respectively installed on opposite side walls of the insulated container. A gap exists between the bottom of the beaker and the bottom of the insulated container. A drain pipe, penetrating the bottom of the insulated container and connected to the waste liquid container, is located at the bottom of the beaker. An electrically controlled valve is installed on the drain pipe. A gear ring is mounted on the portion of the drain pipe inside the insulated container via a bearing and bearing seat. Two opposing connecting plates are located on the top of the gear ring. A stirring rod is located at the end of each connecting plate away from the gear ring. A motor is located at the bottom of the insulated container, with its power output end located at the bottom of the container. A gear meshing with the gear ring is installed on the power output end of the motor.

[0006] Preferably, the beaker is provided with a lid on top, and the lid and the can lid are provided with multiple corresponding through holes. A connecting tube is provided between the through holes, and the two ends of the connecting tube are fixedly connected to the lid and the can lid respectively.

[0007] Preferably, a motor is provided on the top of the can lid, and a stirring shaft is installed at the power output end of the motor. The stirring shaft passes through the can lid and the cup lid and extends into the interior of the beaker. A stirring rod is provided on the part of the stirring shaft located inside the beaker.

[0008] Preferably, the heating element and the cooling element are connected to an external controller and a power source via circuits, respectively.

[0009] Preferably, the insulated container has a viewing window on its side wall, and the beaker is made of transparent glass.

[0010] Preferably, the lid is detachably connected to the top of the insulated container, the lid is detachably connected to the top of the beaker, and a sealing gasket is provided at the interface between the lid and the insulated container and at the interface between the lid and the beaker.

[0011] Preferably, the drain pipe is fixedly installed at the bottom of the heat preservation tank, and the bottom of the beaker and the top of the waste liquid tank are provided with drain holes. Both ends of the two drain holes and the drain pipe are provided with matching threads, and the threads on the drain pipe are provided with a rubber layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model has a simple structure. By starting the second motor, the gear at the power output end of the second motor can be driven to rotate. Since a gear ring is rotatably installed on the drain pipe at the bottom of the beaker through a bearing and a bearing seat, and the gear ring meshes with the gear, the gear can drive the gear ring to rotate synchronously when it rotates. The connecting plate on the gear ring can drive the second stirring rod located between the inner wall of the heat preservation tank and the outer wall of the beaker to rotate, so as to stir the water inside the heat preservation tank and avoid local overheating or underheating. This ensures that the water inside the heat preservation tank is kept at a constant temperature, thus ensuring the accuracy of the titration experimental data.

[0013] 2. The through hole at the top of the lid of this device can be connected to the potentiometric titrator and the automatic liquid addition device through a connecting pipe, which facilitates the addition of reagents required for the experiment into the beaker. Since the lid and the beaker lid are fixedly connected by a connecting pipe, and the lid and the insulated container and the beaker are detachably connected respectively, it is convenient to remove the beaker for cleaning after the experiment, or to replace the beaker if there is a problem. The sealing gaskets on the lid and the lid can ensure the airtightness between the beaker and the insulated container, ensuring that the water inside the insulated container is always in a constant state, and can also prevent the water inside the insulated container from entering the beaker when the stirring rod rotates, thus affecting the titration results.

[0014] 3. This device can drive the stirring shaft to rotate by starting the motor. When the stirring shaft rotates, it can drive the stirring rod to thoroughly stir the solution inside the beaker, ensuring that the reagents are fully mixed and ensuring the titration results.

[0015] 4. This device can control the heating element and cooling element to work alternately through an external controller. The power source can provide energy to the heating element and cooling element. When the water temperature inside the insulation tank is below 16℃, the heating element starts to work. When the temperature sensor detects that the water temperature has reached 16℃, the heating element stops working. When the water temperature inside the insulation tank is above 16℃, the cooling element starts to work. When the temperature sensor detects that the water temperature has reached 16℃, the cooling element stops working, thus ensuring that the water inside the insulation tank is always at 16℃.

[0016] 5. Because the beaker is made of transparent glass, the experimenter can easily observe the color change of the reagent inside the beaker through the viewing window. In addition, a light-shielding cloth can be placed on the outside of the viewing window to provide light protection for the experiment. When the experimenter needs to observe, the light-shielding cloth can be lifted to observe the color change of the reagent inside the beaker.

[0017] 6. Because the beaker and one end of the drain pipe are connected by threads, the beaker can be removed for cleaning after use, or quickly replaced if damaged. Since the waste liquid tank and the drain pipe are also connected by threads, it is easy to separate the waste liquid tank from the drain pipe and collect the waste liquid inside the waste liquid tank for centralized treatment. Furthermore, because the threads at both ends of the drain pipe are equipped with rubber layers, the sealing between the drain pipe and the beaker and waste liquid tank can be further improved. This not only prevents water from the inside of the insulation tank from entering the beaker, but also prevents wastewater from seeping into the external environment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 A cross-sectional view of this utility model Figure 1 ; Figure 4 A cross-sectional view of this utility model Figure 2 ; Figure 5 A cross-sectional view of this utility model Figure 3 .

[0019] In the diagram: 1. Insulated tank; 2. Support leg; 3. Waste liquid tank; 4. Tank lid; 5. Connecting pipe; 6. Cup lid; 7. Beaker; 8. Motor 1; 9. Stirring shaft; 10. Stirring rod 1; 11. Drain pipe; 12. Gear ring; 13. Connecting plate; 14. Stirring rod 2; 15. Heating element; 16. Cooling element; 17. Viewing window; 18. Motor 2; 19. Gear; 20. Electric control valve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1 A constant-temperature titration apparatus for determining sodium indigo disulfonate in water, the structure of which is as follows: Figures 1-5 As shown, the device includes an insulated container 1, with supporting legs 2 and a waste liquid tank 3 at the bottom. A lid 4 is located on the top of the container. A beaker 7 for measurement is placed inside the container, filled with water that contacts the sidewall of the beaker 7. Heating elements 15 and cooling elements 16 are respectively located on opposite sidewalls of the container. A gap exists between the bottom of the beaker 7 and the bottom of the container 1. A drain pipe 11, penetrating the bottom of the container 1 and connected to the waste liquid tank 3, is located at the bottom of the beaker 7. The drain pipe 11 is equipped with an electric control valve 20. The portion of the drain pipe 11 located inside the heat preservation tank 1 is fitted with a gear ring 12 via a bearing and a bearing seat. The top of the gear ring 12 is provided with two opposing connecting plates 13. The ends of the connecting plates 13 away from the gear ring 12 are provided with a stirring rod 14. The bottom of the heat preservation tank 1 is provided with a motor 18. The power output end of the motor 18 is located at the bottom inside the heat preservation tank 1. The power output end of the motor 18 is fitted with a gear 19 that meshes with the gear ring 12.

[0022] The beaker 7 inside the insulation tank 1 is not in direct contact with the insulation tube, and the water inside the insulation tank 1 does not completely submerge the beaker 7. A temperature sensor is installed inside the insulation tank 1. Through the alternating operation of the heating elements 15 and cooling elements 16 on both sides of the insulation tank 1, and in conjunction with the temperature sensor, the water inside the insulation tank 1 can be kept at 16℃, ensuring the temperature of the beaker 7 inside the insulation tank 1 is maintained. Since water closer to the heating elements 15 or cooling elements 16 is more affected when they are working, temperature differences within the water inside the insulation tank 1 are avoided. Starting the motor 18 can drive... The gear 19 at the power output end of motor 18 rotates. Since a gear ring 12 is rotatably installed on the drain pipe 11 at the bottom of beaker 7 through bearings and bearing seats, and the gear ring 12 meshes with the gear 19, the gear 19 can drive the gear ring 12 to rotate synchronously when it rotates. The connecting plate 13 on the gear ring 12 can drive the stirring rod 14 located between the inner wall of the heat preservation tank 1 and the outer wall of the beaker 7 to rotate, so as to stir the water inside the heat preservation tank 1, avoid local overheating or underheating, and ensure that the water inside the heat preservation tank 1 is at a constant temperature, thus ensuring the accuracy of the titration experimental data.

[0023] The beaker 7 is topped with a lid 6. The lid 6 and the canister lid 4 have multiple corresponding through holes, and a connecting tube 5 is provided between the through holes. Both ends of the connecting tube 5 are fixedly connected to the lid 6 and the canister lid 4, respectively. The canister lid 4 is detachably connected to the top of the insulated container 1, and the lid 6 is detachably connected to the top of the beaker 7. Sealing gaskets are provided at the interfaces between the canister lid 4 and the insulated container 1, and between the lid 6 and the beaker 7.

[0024] The through hole at the top of the lid 4 can be connected to the potentiometric titrator and the automatic liquid addition device through the connecting pipe 5, which facilitates the addition of reagents required for the experiment into the beaker 7. Since the lid 4 and the beaker lid 6 are fixedly connected by the connecting pipe 5, and the lid 4 and the beaker lid 6 are detachably connected to the insulation tank 1 and the beaker 7 respectively, it is convenient to remove the beaker 7 for cleaning after the experiment, or to replace the beaker 7 if there is a problem. The sealing gaskets on the beaker lid 6 and the lid 4 can ensure the airtightness between the beaker 7 and the insulation tank 1, ensuring that the water inside the insulation tank 1 is always in a constant state, and can also prevent the water inside the insulation tank 1 from entering the beaker 7 when the stirring rod 14 drives the water inside the insulation tank 1 to rotate, thus affecting the titration results.

[0025] The top of the can lid 4 is equipped with a motor 8, and the power output end of the motor 8 is equipped with a stirring shaft 9. The stirring shaft 9 passes through the can lid 4 and the cup lid 6 and extends into the interior of the beaker 7. The part of the stirring shaft 9 located inside the beaker 7 is equipped with a stirring rod 10.

[0026] When the solution inside beaker 7 reaches the specified temperature, the motor 8 can drive the stirring shaft 9 to rotate. When the stirring shaft 9 rotates, it can drive the stirring rod 10 to fully stir the solution inside beaker 7, ensuring that the reagents are fully mixed and ensuring the titration results.

[0027] The heating element 15 and the cooling element 16 are respectively connected to an external controller and a power source via circuits.

[0028] An external controller can control the heating element 15 and the cooling element 16 to work alternately. A power source can provide energy to the heating element 15 and the cooling element 16. When the water temperature inside the insulation tank 1 is below 16°C, the heating element 15 starts working. When the temperature sensor detects that the water temperature has reached 16°C, the heating element 15 stops working. When the water temperature inside the insulation tank 1 is above 16°C, the cooling element 16 starts working. When the temperature sensor detects that the water temperature has reached 16°C, the cooling element 16 stops working, thus always ensuring that the water inside the insulation tank 1 is at 16°C.

[0029] The insulated container 1 has a viewing window 17 on its side wall, and the beaker 7 is made of transparent glass.

[0030] Since beaker 7 is made of transparent glass, the test personnel can easily observe the color change of the reagent inside beaker 7 through the viewing window 17. In addition, a light-shielding cloth can be set on the outside of the viewing window 17 to provide light-proof testing. When the test personnel need to observe, they can lift the light-shielding cloth and observe the color change of the reagent inside beaker 7.

[0031] Example 2 Based on Embodiment 1, the drain pipe 11 is fixedly installed at the bottom of the heat preservation tank 1, and the bottom of the beaker 7 and the top of the waste liquid tank 3 are provided with drain holes. Both drain holes and both ends of the drain pipe 11 are provided with matching threads, and the threads on the drain pipe 11 are provided with a rubber layer.

[0032] The electrically controlled valve 20 on the drain pipe 11 can be opened after the experiment is completed, and the wastewater inside the beaker 7 after the experiment is discharged into the waste liquid tank 3 through the drain pipe 11. Since the beaker 7 is connected to one end of the drain pipe 11 by a thread, the beaker 7 can be taken out for cleaning after use, or it can be quickly replaced if it is damaged. Since the waste liquid tank 3 is also connected to the drain pipe 11 by a thread, it is easy to separate the waste liquid tank 3 from the drain pipe 11 and collect the waste liquid inside the waste liquid tank 3 for centralized treatment. Furthermore, since the threads at both ends of the drain pipe 11 are provided with a rubber layer, the sealing between the drain pipe 11, the beaker 7, and the waste liquid tank 3 can be further improved. This not only prevents water inside the insulation tank 1 from entering the beaker 7, but also prevents wastewater from seeping into the external environment.

[0033] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations, additions, subtractions, or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A constant-temperature titration apparatus for determining sodium indigo disulfonate in water, comprising a heat-insulating container (1), wherein the bottom of the heat-insulating container (1) is provided with a support leg (2) and a waste liquid container (3), characterized in that, The insulated container (1) is provided with a lid (4) on top. A beaker (7) for measurement is provided inside the insulated container (1). The insulated container (1) is filled with water that contacts the side wall of the beaker (7). Heating elements (15) and cooling elements (16) are respectively provided on opposite side walls of the insulated container (1). There is a gap between the bottom of the beaker (7) and the bottom of the insulated container (1). A drain pipe (11) is provided at the bottom of the beaker (7) that penetrates the bottom of the insulated container (1) and connects to the waste liquid tank (3). An electrically controlled valve is provided on the drain pipe (11). 20), the portion of the drain pipe (11) located inside the heat preservation tank (1) is equipped with a gear ring (12) via a bearing and a bearing seat. The top of the gear ring (12) is provided with two opposing connecting plates (13). The end of the connecting plate (13) away from the gear ring (12) is provided with a stirring rod (14). The bottom of the heat preservation tank (1) is provided with a motor (18). The power output end of the motor (18) is located at the bottom inside the heat preservation tank (1). The power output end of the motor (18) is equipped with a gear (19) that meshes with the gear ring (12).

2. The isothermal titration apparatus for determining sodium indigo disulfonate in water according to claim 1, characterized in that, The beaker (7) is provided with a lid (6) on top. The lid (6) and the can lid (4) are provided with multiple corresponding through holes. A connecting tube (5) is provided between the through holes. The two ends of the connecting tube (5) are fixedly connected to the lid (6) and the can lid (4) respectively.

3. The isothermal titration apparatus for determining sodium indigo disulfonate in water according to claim 2, characterized in that, The top of the can lid (4) is equipped with a motor (8), and the power output end of the motor (8) is equipped with a stirring shaft (9). The stirring shaft (9) penetrates the can lid (4) and the cup lid (6) and extends into the interior of the beaker (7). The part of the stirring shaft (9) located inside the beaker (7) is equipped with a stirring rod (10).

4. The isothermal titration apparatus for determining sodium indigo disulfonate in water according to claim 1, characterized in that, The heating element (15) and the cooling element (16) are respectively connected to an external controller and a power source via circuits.

5. The isothermal titration apparatus for determining sodium indigo disulfonate in water according to claim 1, characterized in that, The insulated container (1) has a viewing window (17) on its side wall, and the beaker (7) is made of transparent glass.

6. The isothermal titration apparatus for determining sodium indigo disulfonate in water according to claim 2, characterized in that, The lid (4) is detachably connected to the top of the insulated container (1), the cup lid (6) is detachably connected to the top of the beaker (7), and sealing gaskets are provided at the interface between the lid (4) and the insulated container (1) and at the interface between the cup lid (6) and the beaker (7).

7. The isothermal titration apparatus for determining sodium indigo disulfonate in water according to claim 1, characterized in that, The drain pipe (11) is fixedly installed at the bottom of the heat preservation tank (1). The bottom of the beaker (7) and the top of the waste liquid tank (3) are provided with drain holes. Both drain holes and both ends of the drain pipe (11) are provided with matching threads. The threads on the drain pipe (11) are provided with a rubber layer.

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