Device for constant-temperature automatic titration

Abstract

The utility model belongs to the technical field of experimental instruments, and discloses a device for constant-temperature automatic titration, which comprises a constant-temperature box, an electronic thermometer, a magnetic suspension stirrer, a burette and a controller, and a constant-temperature temperature control element is arranged in the constant-temperature box; the constant-temperature control element, the controller and the electronic thermometer jointly form a constant-temperature system to ensure that the temperature of the solution is constant in the titration process. The burette controls the piston to move through the micro motor and the electric telescopic rod which can accurately control the speed, so that automatic titration is realized. A penetrating hole is formed in the top of the constant-temperature box and used for installing an electronic thermometer to monitor solution temperature in real time. The suspended magnetic stirrer is used for accelerating the reaction speed; the observation window is convenient for observing the reaction process. The automatic titration device solves the problem of inaccurate experimental results caused by temperature change of the conventional titration device, has the advantages of automatic titration, constant-temperature control, simplicity and convenience in operation and the like, and is suitable for titration experiments.

Description

Technical Field

[0001] This utility model relates to the field of experimental instrument technology, and in particular to a device for constant temperature automatic titration. Background Technology

[0002] Titration is a common experimental analysis method. However, existing titration devices often lack temperature control. In titration analysis, some reactants are easily affected by temperature, resulting in inconsistent test results due to temperature changes. At the same time, some volatile test solutions may experience a decrease in accuracy due to temperature increases during titration. Therefore, it is necessary to solve the problem of isotropic detection of test solutions during the experiment. Utility Model Content

[0003] The present invention aims to provide a device for constant temperature automatic titration to solve the problem that temperature can easily affect experimental results during titration.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An apparatus for constant-temperature automatic titration includes a constant-temperature chamber and an electronic thermometer. A rotatable door with an observation window is rotatably connected to the front of the chamber. A magnetic stirrer is placed inside the chamber, with a container for holding liquid placed on top of the stirrer. Temperature control elements are located on both sides of the chamber's interior for heating the interior. A controller is connected externally to the chamber to control the power and switching of the temperature control elements. The controller is connected to the electronic thermometer. The temperature control elements, controller, and electronic thermometer together constitute a constant-temperature system. The thermostat has an insertion hole on the top for inserting an electronic thermometer to measure the temperature of the liquid inside the container. A support frame is located on the side of the thermostat, with a micro motor connected to the top of the support frame. A burette is clamped and fixed on the support frame, and a piston is slidably connected inside the burette. An electric telescopic rod is connected to the top of the piston and is connected to the micro motor, which controls the electric telescopic rod. The bottom of the burette extends into the thermostat, and a control valve is located at the bottom of the burette. A liquid addition tube is connected to the top side of the burette for adding solution into the burette.

[0006] Furthermore, the heating element in the constant temperature control element is one of the following: heating wire, heating tube, infrared heater, and quartz heating tube; the cooling element is one of the following: air cooling and water cooling.

[0007] Furthermore, four insertion holes are equidistantly arranged on the top of the constant temperature chamber.

[0008] Furthermore, a sealing ring is provided at the contact connection between the burette and the constant temperature chamber.

[0009] The principle of the technical solution: The constant temperature chamber of this utility model is equipped with a constant temperature control element, which is connected to a controller. The controller is used to control the power and switching of the constant temperature control element. An electronic thermometer is used to monitor the temperature of the solution to be tested. The electronic thermometer, controller, and constant temperature control element together form a constant temperature system, thereby ensuring that the temperature of the solution to be tested is constant. The burette is used to hold the titration solution. The titration solution is precisely injected into the container containing the solution to be tested by a micro motor that can be precisely controlled to drive an electric telescopic rod to push the piston. The magnetic stirrer can accelerate the reaction by setting up a suspension. The multiple perforations can accommodate containers of different sizes.

[0010] The beneficial effects of the technical solution are as follows: This utility model places an electronic thermometer inside the solution to be tested, which can monitor the temperature of the solution in real time. At the same time, the combination of the controller and the constant temperature control element forms a constant temperature system, which can ensure that the titration process is carried out at a constant temperature, thereby ensuring the accuracy of the experiment. Furthermore, by setting a micro motor to control the titration, the accuracy of the titration can be further improved. While avoiding human error, it can also reduce the labor intensity of the experimenters. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present invention;

[0012] Figure 2 This is a structural diagram of the thermometer when it is separated and the door is opened.

[0013] Figure 3 This is a cross-sectional view of the internal structure of the constant temperature chamber of this utility model;

[0014] The corresponding labels in the attached diagram are as follows: constant temperature chamber 1, electronic thermometer 2, magnetic stirrer 3, container 4, support frame 5, burette 6, sealing ring 7, switch door 11, observation window 12, constant temperature control element 13, controller 14, through hole 15, micro motor 51, piston 52, electric telescopic rod 53, switch valve 61, liquid addition pipe 62. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0016] like Figures 1-3The apparatus shown is for an automatic thermostatic titration, comprising a thermostatic chamber 1, a switch door 11 rotatably connected to the front of the thermostatic chamber 1, an observation window 12 for observing reaction changes in an internal container 4, a handle connected to the switch door 11, a magnetic stirrer 3 placed inside the switch door 11, a container 4 containing the solution to be tested placed on top of the magnetic stirrer 3, and the rotor of the magnetic stirrer 3 placed inside the container 4. Thermostatic control elements 13 are arranged on both the left and right sides of the thermostatic chamber 1, with a quartz heating tube for the heating element and an air-cooled cooling element for the cooling element. A controller 14 is connected to the right side of the thermostatic chamber 1 for controlling the power and switching of the quartz heating tube. Four insertion holes 15 are equidistantly arranged on the top of the thermostatic chamber 1 for inserting... An electronic thermometer 2 is placed inside the chamber 1. The electronic thermometer 2 is connected to the controller 14. The electronic thermometer 2, the constant temperature control element 13, and the controller 14 together form a constant temperature system. A support frame 5 is placed on the side of the constant temperature chamber 1. A burette 6 is clamped and fixed on the support frame 5. A micro motor 51 is connected to the top of the support frame 5. The micro motor 51 is connected to an electric telescopic rod 53. The electric telescopic rod 53 is controlled by the micro motor 51. A piston 52 is connected to the bottom of the electric telescopic rod 53. The piston 52 is located inside the burette 6. The top of the burette 6 is open. The bottom of the burette 6 extends into the constant temperature chamber 1. A switch valve 61 is set at the bottom of the burette 6. The switch valve 61 is used to control the opening and closing of the burette 6. A liquid addition tube 62 is connected to the top side of the burette 6. The liquid addition tube 62 is used to add titrant liquid into the burette 6.

[0017] The specific implementation process is as follows: First, the container 4 containing the liquid to be tested is placed in the constant temperature chamber 1. The electronic thermometer 2 is inserted into the constant temperature chamber 1 through the insertion hole 15, so that the bottom of the electronic thermometer 2 is in the solution to be tested, thereby measuring the temperature of the solution to be tested. The liquid for titration is added to the burette 6 through the liquid addition tube 62. The constant temperature during the titration process is set on the controller 14. During the titration process, the controller 14 controls the power of the constant temperature control element 13 to ensure the constant temperature. The electric telescopic rod 53 is slowly pushed down by the micro motor 51, so that the piston 52 slowly adds the solution in the burette 6 to the solution to be tested. The magnetic stirrer 3 can stir the solution in the container 4, thereby accelerating the reaction. The reaction changes in the container 4 can be observed through the observation window 12.

[0018] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An apparatus for constant-temperature automatic titration, characterized in that: The thermostat includes a constant temperature chamber (1) and an electronic thermometer (2). A switch door (11) is rotatably connected to the front of the constant temperature chamber (1), and an observation window (12) is provided on the switch door (11). A magnetic stirrer (3) is placed inside the constant temperature chamber (1), and a container (4) for holding liquid is placed on top of the magnetic stirrer (3). Temperature control elements (13) are provided on both sides inside the constant temperature chamber (1) to heat the interior of the constant temperature chamber (1). A controller (14) is connected to the outside of the constant temperature chamber (1) to control the power and switching of the temperature control elements (13). The controller (14) is connected to the electronic thermometer (2). The temperature control elements (13), controller (14), and electronic thermometer (2) together form a constant temperature system. A through hole (15) is provided on the top of the constant temperature chamber (1). The insertion hole (15) is used to insert the electronic thermometer (2) to measure the temperature of the liquid inside the container (4). A support frame (5) is provided on the side of the constant temperature box (1). A micro motor (51) is connected to the top of the support frame (5). A burette (6) is clamped and fixed on the support frame (5). A piston (52) is slidably connected inside the burette (6). An electric telescopic rod (53) is connected to the top of the piston (52). The electric telescopic rod (53) is connected to the micro motor (51). The electric telescopic rod (53) is controlled by the micro motor (51). The bottom end of the burette (6) extends into the constant temperature box (1). A control switch valve (61) is provided at the bottom of the burette (6). A liquid addition tube (62) is connected to the top side of the burette (6). The liquid addition tube (62) is used to add solution into the burette (6).

2. The apparatus for constant-temperature automatic titration according to claim 1, characterized in that: The heating part of the constant temperature control element (13) is one of electric heating wire, electric heating tube, infrared heater and quartz heating tube, and the cooling part is one of air cooling and water cooling.

3. The apparatus for constant-temperature automatic titration according to claim 1, characterized in that: The constant temperature chamber (1) has four through holes (15) evenly spaced on the top.

4. The apparatus for constant-temperature automatic titration according to claim 1, characterized in that: A sealing ring (7) is provided at the contact connection between the burette (6) and the constant temperature box (1).

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