An automatic detector

Abstract

The utility model relates to an automatic detector belongs to the technical field of detection instrument, including instrument shell, reagent filling mechanism, the reagent bottle carousel for detecting sample, illumination light source and sensor, a plurality of reagent bottle hole positions are arranged on the carousel, and the side surface of reagent bottle hole position is opened to make light pass through, and reagent filling mechanism adds reagent in reagent bottle as needed to reagent bottle, judge titration end point through the sensor receiving the strong weak change light of reagent reflection, and measure the peroxide value or acid value of edible oil through the change of real -time detection indicator. The utility model utilizes the reflection principle of light, and real -time monitoring to the solution color change, can judge the titration end point of peroxide value or acid value of sample accurately. Since staff manual operation is not needed, the titration process is more accurate, automation operation, and staff does not need to endure the foul smell of reagent, reduces the harm of chemical reagent of experimental personnel.

Description

Technical Field

[0001] This utility model relates to an automatic testing instrument, belonging to the field of testing instrument technology. Background Technology

[0002] In the field of food sample quality testing, peroxide value and acid value are key indicators for measuring the degree of oxidation and rancidity of samples. Traditional methods for detecting peroxide value and acid value in samples mostly rely on manual titration. During the titration process, staff members need to manually add reagents to the sample and judge the titration endpoint by visually observing the color change of the solution. This method not only requires a high degree of operational skill and visual sensitivity from the staff, but is also highly susceptible to errors due to human factors, making the determination of the titration endpoint inaccurate.

[0003] Meanwhile, the reagents used in the testing are toxic and harmful, such as chloroform mixed with glacial acetic acid or ether. These reagents are highly irritating and toxic, and prolonged exposure to such a working environment can seriously affect the health of staff. Furthermore, manual operation is inefficient and cannot meet the needs of large-scale sample testing. With the continuous development of technology, higher requirements are being placed on the accuracy, efficiency, and environmental friendliness of the testing of quality indicators such as peroxide value and acid value of edible oils. Utility Model Content

[0004] The purpose of this invention is to provide an automatic detection instrument to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An automatic testing instrument includes an instrument housing, a reagent dispensing mechanism, a reagent bottle turntable for testing samples, an illumination light source, and a sensor. The turntable has several reagent bottle holes, with side openings on the reagent bottle holes to allow light to pass through. The reagent dispensing mechanism dispenses reagents from the reagent bottles as needed. The turntable, reagent dispensing mechanism, illumination light source, and sensor are housed inside the instrument housing and are fitted with end caps. The instrument determines the titration endpoint by receiving changes in the intensity of light reflected from the reagents using the sensor, and measures the peroxide value or acid value of the edible oil by real-time detection of changes in the indicator.

[0007] A further improvement to the technical solution of this utility model is that a magnetic stirrer is installed at the lower part of the reagent bottle hole.

[0008] A further improvement to the technical solution of this utility model is as follows: the reagent dispensing mechanism includes a rotating arm, a dispensing pump, and a dispensing pipe; the rotating arm is driven to rotate by a servo motor; a dispensing nozzle is provided at the end of the rotating arm; one end of the dispensing pipe extends out of the instrument housing, and the other end extends along the inside of the rotating arm and is connected to the dispensing nozzle.

[0009] A further improvement to the technical solution of this utility model is that, during use, the filling pipe extends from the instrument housing and connects to the filling reagent bottle.

[0010] A further improvement to the technical solution of this utility model is that several reagent dispensing mechanisms are provided.

[0011] A further improvement to the technical solution of this utility model is that the reagent filling mechanism has multiple reagent filling nozzles.

[0012] Due to the adoption of the above technical solution, the technical effects achieved by this utility model are as follows:

[0013] This invention utilizes the principle of light reflection. During the addition of reagent to the sample-containing bottle, the color of the indicator solution gradually changes with the amount of reagent added. The endpoint of the titration is determined by observing the color change, thus enabling accurate assessment of the peroxide value or acid value of edible oils. The instrument's detection process is automated, eliminating the need for manual operation, resulting in greater precision, and freeing operators from the unpleasant odor of the reagents. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] The components are: 1. Instrument housing; 2. Turntable; 3. Reagent bottle port; 4. End cap; 5. Rotating arm. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] This invention relates to an automatic testing instrument used to detect the peroxide value and acid value of oil products. It achieves automated detection by utilizing sensors.

[0019] like Figure 1As shown, the instrument mainly includes an instrument housing 1, a reagent dispensing mechanism, and a reagent bottle turntable 2 for sample testing. During operation, reagents and indicators are added to the reagent bottle via the reagent dispensing mechanism, and the titration endpoint is determined by the color change of the solution. The instrument also includes an illumination light source and a sensor. The illumination light source illuminates the sample to be tested, and the light reflected from the sample is received by the sensor, which determines the titration endpoint. The endpoint is determined by the sensor receiving changes in the intensity of light reflected by the reagent, and the peroxide value or acid value of the edible oil is measured in real time by detecting changes in the indicator.

[0020] The instrument is equipped with a turntable with several reagent bottle holes 3. During operation, reagent bottles are placed in the reagent bottle holes 3. The turntable rotates to detect samples from multiple different reagent bottles. Through holes are provided on the side of the reagent bottle holes 3, with two through holes positioned opposite each other. These through holes allow light to pass through and be received by the sensor.

[0021] The instrument's reagent dispensing mechanism can dispense reagents from the reagent bottle as needed. The reagent dispensing mechanism has a liquid delivery pump and pipelines, with multiple different pipelines dispensing different reagents into the reagent bottle.

[0022] The instrument has a housing 1, inside which the turntable, reagent dispensing mechanism, irradiation light source, and sensor are housed. An end cap 4 is located at the top of the housing 1. During operation, the end cap 4 is closed.

[0023] To ensure better mixing and reaction between the reagents and the sample to be tested, a magnetic stirrer is typically installed at the bottom of each reagent bottle's port 3. During use, the magnetic stirrer is placed inside the reagent bottle, and the solution is stirred and mixed using the magnetic stirring assembly.

[0024] The reagent dispensing mechanism of this instrument includes a rotating arm 5, a dispensing pump, and a dispensing pipe. The rotating arm 5 is driven to rotate by a servo motor. A dispensing nozzle is located at the inner end of the rotating arm 5. One end of the dispensing pipe extends outward from inside the instrument housing, and the other end extends along the contour of the rotating arm 5 on its inner wall and connects to the dispensing nozzle. The rotating arm 5 can drive the dispensing nozzle to rotate. During dispensing, the rotating arm 5 rotates to a position above the reagent bottle, and then the reagent is dispensed through the dispensing nozzle. After dispensing is completed, or in a non-operating state, the rotating arm 5 rotates back to its original position outside the area above the turntable.

[0025] The instrument can be equipped with multiple reagent filling mechanisms; or multiple filling channels can be set for each reagent filling mechanism, which requires multiple filling nozzles.

[0026] When in use, the filling tube extends from the instrument housing and connects to the filling reagent bottle.

[0027] In use, the reagent bottle containing the sample to be tested is placed into the reagent bottle port 3 of the turntable 2, and the outer ends of different dispensing pipes are inserted into different reagent bottles. After the instrument is started, the reagent dispensing mechanism adds reagent to the reagent bottle according to the desired level. Simultaneously, the light source illuminates the reagent bottle at the detection position, and the sensor receives the light. During the reagent addition process, the color of the solution changes. At the titration endpoint, the instrument control system receives the change in the light signal from the sensor to determine the endpoint. The entire titration detection process requires no additional manual operation. The principle for detecting peroxide value and acid value is the same; the final color of the titration endpoint differs due to the different indicators used.

[0028] This invention utilizes the principle of light reflection to accurately determine the peroxide value and acid value of edible oils through instrumental titration. Since no manual operation is required, the titration process is more precise, and staff do not need to endure the unpleasant odors of the reagents, reducing the risk of chemical harm to laboratory personnel.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic detection instrument, characterized in that: The instrument includes a housing (1), a reagent dispensing mechanism, a reagent bottle turntable (2) for testing samples, an illumination light source, and a sensor. Several reagent bottle holes (3) are provided on the turntable (2), and the side of the reagent bottle holes (3) is opened to allow light to pass through. The reagent dispensing mechanism adds the reagent in the reagent bottle to the reagent bottle as needed. The turntable (2), the reagent dispensing mechanism, the illumination light source, and the sensor are set inside the instrument housing (1), and an end cap (4) is provided. The titration endpoint is determined by receiving the light intensity change reflected by the reagent through the sensor, and the peroxide value or acid value of the edible oil is measured by detecting the change of the indicator in real time.

2. The automatic detection instrument according to claim 1, characterized in that: A magnetic stirrer is installed at the bottom of the reagent bottle hole (3).

3. An automatic detection instrument according to claim 1, characterized in that: The reagent dispensing mechanism includes a rotating arm (5), a dispensing pump, and a dispensing pipe; the rotating arm (5) is driven to rotate by a motor; a dispensing nozzle is provided at the end of the rotating arm (5); one end of the dispensing pipe extends out of the instrument housing, and the other end extends along the inside of the rotating arm and is connected to the dispensing nozzle.

4. An automatic detector according to claim 1, characterized in that: When in use, the filling tube extends from the instrument housing and connects to the filling reagent bottle.

5. An automatic detection instrument according to claim 3, characterized in that: Several reagent dispensing mechanisms are set up.

6. An automatic detector according to any one of claims 3 or 5, characterized in that: The reagent dispensing mechanism has multiple reagent dispensing nozzles.

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