A device for measuring the consumption of potassium permanganate

Abstract

The utility model relates to a kind of potassium permanganate consumption's measuring device, base, lifting platform, magnetic stirring heating jacket, conical flask, rotary support arm and magnetic stirrer, the lifting platform, rotary support arm and magnetic stirrer are set on base, the lifting platform and magnetic stirrer are set in the left and right sides of rotary support arm, the magnetic stirring heating jacket is fixed in lifting platform top, the conical flask is clamped and fixed in magnetic stirring heating jacket by rotary support arm, the conical flask inner bottom center is equipped with magnetic stirrer, the magnetic stirrer is equipped with support, the support is connected burette by butterfly clamp.The utility model degree of automation is high, conical flask is handled between heating station and titration station by rotary support arm, magnetic stirring heating jacket and magnetic stirrer respectively to the solution of heating station, titration station is stirred, work efficiency is high, safety is high, applicable to batch potassium permanganate consumption determination.

Description

Technical Field

[0001] This utility model relates to the field of laboratory equipment technology, specifically to a device for measuring potassium permanganate consumption, used to assess the total amount of oxidizable contaminants in food contact materials and products. Background Technology

[0002] Potassium permanganate consumption determination is used to assess the total amount of oxidizable contaminants in food contact materials to ensure that these materials do not release harmful substances during use, thereby protecting food safety and consumer health.

[0003] Typically, we add 100mL of soaking solution, 10mL of potassium permanganate solution, and 5mL of (1+2) sulfuric acid to a glass conical flask, and heat to boiling for 5 minutes. To prevent uneven heating and potential blow-off, we continuously shake the flask while holding it during heating. After the 5-minute reaction, we immediately remove the flask and add 10mL of oxalic acid standard solution while it's still hot. Then, we immediately titrate while holding the scalding hot flask. In these three consecutive steps, we directly touch the scalding hot glass conical flask with our bare hands. Each experiment involves large-scale processing. To prevent burns, we wear thick gloves each time. During this process, we need to constantly put on and take off gloves for ease of operation. This continuous series of operations easily leads to burns, which is not only unsafe but also affects work efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a device for measuring potassium permanganate consumption. It has a simple structure, which improves work efficiency and reduces safety hazards.

[0005] The purpose of this utility model is achieved as follows: A device for determining potassium permanganate consumption includes a base, a lifting platform, a magnetic stirring and heating jacket, a conical flask, a rotating support arm, and a magnetic stirrer. The lifting platform, rotating support arm, and magnetic stirrer are mounted on the base and positioned on the left and right sides of the rotating support arm. The magnetic stirring and heating jacket is fixed to the top of the lifting platform. The conical flask is clamped and fixed inside the magnetic stirring and heating jacket by the rotating support arm. A magnetic stir bar is located at the center of the bottom of the conical flask. A bracket is mounted on the magnetic stirrer, and the bracket is connected to a burette via a butterfly clamp.

[0006] Preferably, the rotating support arm includes a rotating platform, a lifting cylinder, a lateral cylinder, and a finger cylinder. The lifting cylinder is fixed on the turntable of the rotating platform. The telescopic rod of the lifting cylinder is connected to the lateral cylinder. The telescopic rod of the lateral cylinder is connected to the finger cylinder through a connecting block. The finger cylinder clamps the straight section of the conical flask.

[0007] Preferably, the finger cylinder includes two grippers, each gripper having an arc-shaped groove corresponding to the straight section of the conical bottle, and an anti-slip silicone sheet embedded in the arc-shaped groove.

[0008] Preferably, the anti-slip silicone sheet has multiple anti-slip protrusions.

[0009] Preferably, the burette is positioned above the conical flask in the dropping position.

[0010] Preferably, the position of the conical bottle is adjusted by the rotating platform of the rotating support arm, the lifting cylinder, and the lateral cylinder.

[0011] The beneficial effects of this utility model are: With a simple structure and high degree of automation, it eliminates the need for traditional manual shaking and clamping of conical flasks. Instead, it uses a rotating support arm to move the conical flask between the heating and titration stations. Magnetic stirring heating jacket and magnetic stirrer are used to stir the solutions at the heating and titration stations respectively, freeing up hands, improving work efficiency and reducing safety hazards. It is suitable for batch determination of potassium permanganate consumption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a device for measuring potassium permanganate consumption according to the present invention (the conical flask is located at the heating station).

[0013] Figure 2 This is a schematic diagram of the structure of a device for measuring potassium permanganate consumption according to the present invention (the conical flask is located at the titration station).

[0014] Figure 3 This is a top view of the finger cylinder.

[0015] The components include: base 1; lifting platform 2; magnetic stirring and heating jacket 3; conical flask 4; magnetic stirrer 5; magnetic stir bar 6; rotating platform 7; lifting cylinder 8; horizontal cylinder 9; finger cylinder 10; gripper 10.1; anti-slip silicone sheet 10.2; anti-slip protrusions 10.2.1; connecting block 11; bracket 12; butterfly clip 13; and burette 14. Detailed Implementation

[0016] See Figure 1-3This utility model relates to a device for measuring potassium permanganate consumption, comprising a base 1, a lifting platform 2, a magnetic stirring and heating sleeve 3, a conical flask 4, a rotating support arm, and a magnetic stirrer 5. The lifting platform 2, the rotating support arm, and the magnetic stirrer 5 are mounted on the base 1. The magnetic stirring and heating sleeve 3 is fixed to the top of the lifting platform 2, and the magnetic stirring and heating sleeve 3 is lifted via the lifting platform 2. The conical flask 4 is placed inside the magnetic stirring and heating sleeve 3, which has a hemispherical groove inside to heat the conical flask 4. A magnetic stir bar 6 is located at the center of the bottom of the conical flask. The lifting platform 2 and the magnetic stirrer 5 are located on the left and right sides of the rotating support arm, which includes a rotating platform 7 and a lifting cylinder. 8. A transverse cylinder 9 and a finger cylinder 10 are provided. The rotating platform 7 is embedded in the base 1. The lifting cylinder 8 is fixed on the turntable of the rotating platform 7. The telescopic rod of the lifting cylinder 8 is connected to the transverse cylinder 9. The telescopic rod of the transverse cylinder 9 is connected to the finger cylinder 10 through a connecting block 11. The finger cylinder 10 includes two grippers 10.1. The grippers 10.1 are provided with arc-shaped clamping grooves corresponding to the straight section of the conical flask 4. Anti-slip silicone sheets 10.2 are embedded in the arc-shaped clamping grooves. The anti-slip silicone sheets 10.2 are provided with multiple anti-slip protrusions 10.2.1. With the cooperation of the anti-slip silicone sheets 10.2 and the anti-slip protrusions 10.2.1, the conical flask 4 is protected and prevented from falling during transportation, thus improving the safety of the experiment.

[0017] The magnetic stirrer 5 is equipped with a support 12, which is connected to a burette 14 via a butterfly clip 13. The burette 14 is positioned above the conical flask 4 for titration with potassium permanganate.

[0018] Working principle: The magnetic stir bar 6 and the magnetic stirring heating jacket 3 work together to uniformly heat the solution in the conical flask 4, preventing uneven heating. The conical flask 4 is held in place on the magnetic stirring heating jacket 3 by the finger cylinder 10. After a specified heating time, heating stops, the lifting platform 2 descends, and the conical flask 4 is placed outside the magnetic stirring heating jacket 3, preparing for its transport. At the same time, the rotating platform 7 rotates, driving the lifting cylinder 8, the horizontal cylinder 9, the finger cylinder 10, and the conical flask 4 to one side of the magnetic stirrer 5. The horizontal cylinder 9 adjusts the relative position of the conical flask 4 and the burette 14. The lifting cylinder 8 descends to place the conical flask 4 on the magnetic stirrer 5. While the burette 14 is titrating, the magnetic stir bar inside the conical flask stirs the solution with magnetic force, eliminating the need to manually shake the conical flask to observe the titration color change, greatly improving experimental efficiency and ensuring high safety.

[0019] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A device for determining potassium permanganate consumption, characterized in that: The system comprises a base, a lifting platform, a magnetic stirring and heating jacket, a conical flask, a rotating support arm, and a magnetic stirrer. The lifting platform, rotating support arm, and magnetic stirrer are mounted on the base and positioned on the left and right sides of the rotating support arm. The magnetic stirring and heating jacket is fixed to the top of the lifting platform. The conical flask is clamped and fixed inside the magnetic stirring and heating jacket by the rotating support arm. A magnetic stir bar is located at the center of the bottom of the conical flask. A bracket is mounted on the magnetic stirrer, and the bracket is connected to a burette via a butterfly clamp.

2. The apparatus for determining potassium permanganate consumption according to claim 1, characterized in that: The rotating support arm includes a rotating platform, a lifting cylinder, a lateral cylinder, and a finger cylinder. The lifting cylinder is fixed on the turntable of the rotating platform. The telescopic rod of the lifting cylinder is connected to the lateral cylinder. The telescopic rod of the lateral cylinder is connected to the finger cylinder through a connecting block. The finger cylinder clamps the straight section of the conical flask.

3. The apparatus for determining potassium permanganate consumption according to claim 2, characterized in that: The finger cylinder includes two grippers, each gripper having an arc-shaped groove corresponding to the straight section of the conical bottle, and an anti-slip silicone sheet embedded in the arc-shaped groove.

4. The apparatus for determining potassium permanganate consumption according to claim 3, characterized in that: The anti-slip silicone sheet has multiple anti-slip bumps.

5. The apparatus for determining potassium permanganate consumption according to claim 1, characterized in that: The burette is positioned above the conical flask in the titration position.

6. The apparatus for determining potassium permanganate consumption according to claim 1 or 2, characterized in that: The position of the conical flask is adjusted by the rotating platform of the rotating support arm, the lifting cylinder, and the horizontal cylinder.

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