A device for neutralizing heat and acid-base titration experiment

Abstract

The utility model relates to a kind of neutralization heat and acid-base titration experimental device, comprising: heat preservation main body, including heat preservation bucket and heat preservation cover, bein provided with beaker in heat preservation bucket, be provided with first through-hole on heat preservation cover;Self-locking valve, solidly connected in heat preservation main body top, including valve body, L type passageway is equipped in valve body, passageway two ends are respectively equipped with the interface connected with syringe and liquid outlet, passageway top is connected with liquid addition passageway, magnetic movable valve core is equipped in passageway, magnetic ring is equipped in passageway and close to liquid outlet side;Rotary drum, fixed on iron stand and with self-locking valve position corresponds;Control device, solidly connected in heat preservation main body below, including magnetic stirrer, self-locking valve, rotary drum wireless communication connection's controller;Electronic scale, be equipped in control device below. Two experiments are completed by above device, set self-locking valve and heat preservation main body lifting device heat preservation capacity, and set reading function, improve device applicability and experimental accuracy.

Description

Technical Field

[0001] This utility model relates to a neutralization heat and acid-base titration experimental apparatus, belonging to the technical field of chemical experimental equipment. Background Technology

[0002] Neutralization heat determination and acid-base neutralization titration are two experimental inquiry activities in high school chemistry, which are of great significance for students to learn and master the relevant content.

[0003] Patent CN202041536U, entitled "Rapid Determination Instrument for Acid Value of Petroleum Products by Temperature Titration," discloses an instrument comprising a precision automatic liquid addition device, a temperature sensor, a reaction vessel, a magnetic stirrer, a computer controller, and storage bottles. The reaction vessel is placed on the magnetic stirrer. The precision automatic liquid addition device has two automatic liquid adders, each connected to one of the two storage bottles via a washing hose. Each of the two automatic liquid adders has a titration hose inserted into the reaction vessel. The temperature sensor's probe is placed inside the reaction vessel. The precision automatic liquid addition device and the temperature sensor are connected to the computer controller via data cables. The computer controller acquires, converts, and processes the transmitted data signals and controls the operation of the precision automatic liquid addition device and the temperature sensor. The advantages are simple instrument structure, convenient operation and maintenance, short test time, and accurate test results, providing a reliable basis for the rapid and accurate determination of the acid value of petroleum products.

[0004] The aforementioned patent achieves precise calculation of acid value through an automatic liquid addition device, temperature sensor, reaction vessel, magnetic stirrer, computer controller, and storage bottle. However, it does not take into account the heat preservation function of the instrument. The liquid is transferred through a hose and peristaltic pump, which can easily generate heat loss during the liquid addition process, thus affecting the accuracy of the calculation results. Utility Model Content

[0005] The purpose of this invention is to provide a neutralization heat and acid-base titration experimental apparatus to solve the problems mentioned in the background art.

[0006] The technical solution of this utility model is as follows: A neutralization heat and acid-base titration experimental apparatus, comprising: The insulation body includes an insulation barrel and an insulation cover. A beaker is placed inside the insulation barrel, and a first through hole is provided on the insulation cover. The self-locking valve is fixed to the top of the insulation body and includes a valve body. The valve body has an L-shaped channel inside, with an interface for connecting a syringe and a liquid outlet at both ends of the channel. A liquid filling channel is connected above the channel. A magnetic movable valve core is installed inside the channel, and a magnetic ring is installed on the side of the channel near the liquid outlet. When the magnetic movable valve core is magnetically attracted to the magnetic ring, the liquid filling channel and the channel are isolated. When the magnetic movable valve core is away from the magnetic ring, the liquid filling channel and the channel are connected. The rotating drum is fixed on the iron frame and corresponds to the position of the self-locking valve. The control device is fixedly attached to the bottom of the insulation body, and includes a control device housing and a controller located inside the control device housing. The controller is wirelessly connected to the magnetic stirrer, the self-locking valve and the drum respectively. An electronic scale is located below the control device.

[0007] Furthermore, the insulated container and the insulated lid are connected by a magnetic sealing strip.

[0008] Furthermore, a dust cover is provided at the top of the liquid filling channel, and the dust cover is removable.

[0009] Furthermore, the insulated container has a three-layer structure, consisting of a stainless steel shell, a vacuum layer, and a quartz inner liner from the outside in.

[0010] Furthermore, a display screen is provided on one side surface of the control device housing.

[0011] Furthermore, the drum is a six-well drum, with each well holding 10 ml of solution.

[0012] Furthermore, a cable outlet is provided on one side of the control device.

[0013] Furthermore, the beaker is equipped with a temperature sensor and a pH sensor, both of which are waterproof. The controller is wirelessly connected to the temperature sensor and the pH sensor, respectively.

[0014] Furthermore, a magnetic stir bar is provided inside the beaker, and a magnetic stirrer is provided inside the housing of the control device, with the magnetic stirrer and the magnetic stir bar being positioned correspondingly.

[0015] This utility model has the following beneficial effects: The experimental apparatus is equipped with a thermal insulation unit, utilizing a multi-layered insulation tank structure and an insulation cover to maintain its temperature. A self-locking valve is also included, activated by drawing gas with a syringe to initiate feeding. The cooperation between the self-locking valve and the thermal insulation unit further enhances the apparatus's insulation capacity, reduces heat loss, and improves experimental accuracy. Pressure and pH sensors are installed within the insulation unit, transmitting their readings to a controller and displaying them on a screen. An electronic scale displays the relevant mass values, facilitating accurate readings, reducing experimental errors, and improving experimental precision. The coordinated operation of the rotating drum, self-locking valve, thermal insulation unit, and control device allows for two different experiments, reducing setup and switching time, making operation convenient, efficient, and enhancing the apparatus's applicability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the self-locking valve of this utility model; Figure 3 This is a schematic diagram of the structure of the thermal insulation body of this utility model.

[0017] The reference numerals in the figure are as follows: 1. Insulation body; 101. Insulation container; 102. Insulation cover; 103. Beaker; 104. Magnetic stir bar; 105. First through hole; 106. Temperature sensor; 107. pH sensor; 108. Magnetic sealing strip; 2. Self-locking valve; 201. Valve body; 202. Channel; 203. Liquid outlet; 204. Interface; 205. Syringe; 206. Magnetic movable valve core; 207. Magnetic ring; 208. Liquid filling channel; 209. Dust cover; 3. Control device; 301. Control device housing; 302. Magnetic stir bar; 303. Controller; 304. Display screen; 305. Cable outlet; 4. Rotary drum; 5. Iron stand; 6. Electronic scale. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 3 As shown, a neutralization heat and acid-base titration experimental apparatus includes: The insulation body 1 includes an insulation container 101 and an insulation cover 102. The insulation cover 102 is used to open and close the top opening of the insulation container 101. The insulation container 101 and the insulation cover 102 are magnetically connected as one unit by a magnetic sealing strip 108. A beaker 103 is provided inside the insulation container 101. A magnetic stir bar 104 is placed on the bottom surface of the beaker 103. The magnetic stir bar 104 is used to mix the solution in the beaker 103 evenly. A temperature sensor 106 and a pH sensor 107 are fixed on the inner wall of the beaker 103. Both the temperature sensor 106 and the pH sensor 107 are waterproof sensors. The above sensors are used to detect the temperature and pH value inside the beaker 103 before and after the reaction. The insulation cover 102 is provided with a first through hole 105 for dripping the solution into the beaker 103. The insulation container 101 has a three-layer structure, which includes a stainless steel shell, a vacuum layer and a quartz inner liner from the outside to the inside.

[0020] The self-locking valve 2, fixedly attached to the top of the insulation body 1, includes a valve body 201. Inside the valve body 201 is an L-shaped channel 202. One end of the channel 202 is a liquid outlet 203, corresponding to the first through hole 105. The other end of the channel 202 has an interface 204, which connects to a syringe 205 via a flexible tube. A liquid filling channel 208 is located above the channel 202, with a dust cover 209 at its top. The dust cover 209 is a removable rubber stopper. A magnetic movable valve is located below the liquid filling channel 208. A magnetic ring 207 is provided on the side of the L-shaped channel 202 near the liquid outlet 203. The magnetic movable valve core 206 and the magnetic ring 207 are magnetically attracted to each other. When the magnetic movable valve core 206 and the magnetic ring 207 are magnetically attracted to each other, the magnetic movable valve core 206 blocks the outlet of the liquid filling channel 208, thus isolating the liquid filling channel 208 from the channel 202. When the magnetic movable valve core 206 and the magnetic ring 207 are separated, the magnetic movable valve core 206 allows the outlet of the liquid filling channel 208 to be opened, thus connecting the liquid filling channel 208 and the channel 202.

[0021] The rotating drum 4 is fixed on the iron frame 5 and corresponds to the self-locking valve 2. The rotating drum 4 is a six-hole rotating drum that can be loaded with different solutions required for different experiments. Each hole of the rotating drum 4 can hold 10ml of solution.

[0022] The control device 3 is fixedly attached to the bottom of the insulation body 1 and includes a control device housing 301. The control device housing 301 contains a magnetic stirrer 302 and a controller 303. The position of the magnetic stirrer 302 corresponds to the magnetic stir bar 104. The magnetic stirrer 302 drives the magnetically attracted magnetic stir bar 104 to rotate in the beaker 103 to achieve stirring. The controller 303 is wirelessly connected to the magnetic stirrer 302, the self-locking valve 2, the drum 4, the temperature sensor 106, and the pH sensor 107. A cable outlet 305 is provided on one side of the control device housing 301 for connecting the controller 303 to the power supply. A display screen 304 is provided on one side of the control device housing 301 to display the data detected by the temperature sensor 106 and the pH sensor 107.

[0023] The specific working principle of this utility model is as follows: 1. Experimental Procedure The required experimental solution and the sample to be tested are added to the rotating drum 4, respectively. The rotating drum 4 is started to rotate via the controller 303. The dust cover 209 of the self-locking valve 2 is opened. The gas inside the valve body 201 is drawn out through the syringe 205. The magnetic movable valve core 206 inside the self-locking valve 2 moves toward the interface 204. Liquid is added to the liquid addition channel 208 from the rotating drum 4. The liquid flows into the first through hole 105 through the outlet 203 and into the beaker 103 of the heat preservation body 1 through the first through hole 105. The temperature sensor 106 and pH sensor are located inside the beaker 103. 107 transmits the detected data to controller 303, which displays the relevant data on display screen 304. In acid-base titration experiment, when the pH value of the solution in beaker 103 reaches the preset value, or in neutralization heat experiment, when the temperature of the solution in beaker 103 reaches the preset value, controller 303 closes self-locking valve 2 and drum 4. Electronic scale 6 weighs the self-locking valve 2, heat preservation body 1 and control device 3 before and after the reaction during the experiment. Finally, based on the value on electronic scale 6, the content of the sample to be tested is calculated.

[0024] 2. Working process of self-locking valve 2 When the self-locking valve 2 needs to be closed, the magnetic movable valve core 206 and the magnetic ring 207 are attracted together by the magnetic force generated between them, and the liquid flow channel 202 is blocked, so as to achieve the sealing and heat insulation between the self-locking valve 2 and the heat insulation body 1. When the self-locking valve 2 needs to be opened, gas is drawn from the valve body 201 through the syringe 205. At this time, a negative pressure is formed in the valve body 201. The magnetic movable valve core 206 overcomes the attraction between itself and the magnetic ring 207 and moves towards the interface 204. At this time, the liquid flows into the channel 202 through the liquid filling channel 208 and enters the heat preservation body 1 through the liquid outlet 203.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A neutralization heat and acid-base titration experimental apparatus, characterized in that, include: The insulation body includes an insulation barrel and an insulation cover. A beaker is placed inside the insulation barrel, and a first through hole is provided on the insulation cover. The self-locking valve is fixed to the top of the insulation body and includes a valve body. The valve body has an L-shaped channel inside, with an interface for connecting a syringe and a liquid outlet at both ends of the channel. A liquid filling channel is connected above the channel. A magnetic movable valve core is installed inside the channel, and a magnetic ring is installed on the side of the channel near the liquid outlet. When the magnetic movable valve core is magnetically attracted to the magnetic ring, the liquid filling channel and the channel are isolated. When the magnetic movable valve core is away from the magnetic ring, the liquid filling channel and the channel are connected. The rotating drum is fixed on the iron frame and corresponds to the position of the self-locking valve. The control device is fixedly attached to the bottom of the insulation body, and includes a control device housing and a controller located inside the control device housing. The controller is wirelessly connected to the magnetic stirrer, the self-locking valve and the drum respectively. An electronic scale is located below the control device.

2. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: The insulated container and the insulated lid are connected by a magnetic sealing strip.

3. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: The top of the liquid filling channel is equipped with a dust cover, which is removable.

4. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: The insulated container has a three-layer structure, consisting of a stainless steel shell, a vacuum layer, and a quartz inner liner from the outside in.

5. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: A display screen is provided on one side surface of the control device housing.

6. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: The drum is a six-well drum, with each well holding 10 ml of solution.

7. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: The control device has a cable outlet on one side.

8. The apparatus for neutralization heat and acid-base titration experiments as described in claim 1, characterized in that: The beaker contains a temperature sensor and a pH sensor, both of which are waterproof. The controller is wirelessly connected to the temperature sensor and the pH sensor, respectively.

9. The experimental apparatus for neutralization heat and acid-base titration as described in claim 1, characterized in that: The beaker is equipped with a magnetic stir bar, and the control device housing is equipped with a magnetic stirrer, with the magnetic stirrer and magnetic stir bar positioned corresponding to each other.

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