Sulfur dioxide detection device for canned fruits

Abstract

The invention relates to the technical field of can production, and discloses a canned fruit sulfur dioxide detection device which comprises a device connecting frame, a spectrophotometer is arranged at one end of the device connecting frame, a device placing frame is arranged at the other end of the device connecting frame, a grinding assembly is arranged on the device placing frame, and a connected chopping assembly is arranged on the grinding assembly. A reaction cup is arranged on the bottom surface of the grinding assembly, and the grinding assembly is connected with a test tube vibration assembly arranged in the middle of the device connecting frame. By arranging the grinding assembly and the chopping assembly, a sample can be firstly chopped and then ground, so that sulfur dioxide in the sample can be released to the maximum extent, and the situation that the result accuracy is affected due to incomplete reaction is avoided; the sulfur dioxide is quantitatively analyzed by reacting the sulfur dioxide with the specific reagent to generate the colored compound and measuring the absorbance by matching with the spectrophotometer, so that the method is high in sensitivity and accuracy and is more suitable for cans and other scenes with lower sulfur dioxide content.

Description

Technical Field

[0001] The invention relates to the technical field of canned food production, in particular to a sulfur dioxide detection device for canned fruit. Background Art

[0002] Canned fruit is a kind of food that is processed and seasoned, then packaged in a container and sterilized at high temperature to achieve commercial sterility, so that it can be stored for a long time at room temperature. In the production process of canned fruit, sulfur dioxide is often used as a color preservative for canned fruit to prevent browning of the fruit during processing and storage, and to maintain the original bright color of the fruit. At the same time, sulfur dioxide can also bleach the pulp in canned fruit, and has antibacterial properties, which can extend the shelf life of canned fruit and prevent microbial contamination. However, in actual production, sulfur dioxide may exceed the standard, which will have adverse effects on human health. Therefore, it is necessary to test the sulfur dioxide content of canned fruit before leaving the factory.

[0003] At present, the patent with the announcement number CN109521009B discloses a sulfur dioxide detection device for canned fruit, which includes a crushing chamber with a detection box located at the upper part and a detection chamber located at the lower part; the crushing chamber is provided with a crushing device, a crushing outer cylinder, and a crushing inner cylinder located in the crushing outer cylinder and detachably connected to it; the conical structure at the bottom of the crushing outer cylinder is located in the detection chamber, and a lower sample tube is opened in the middle; a rotatable blocking rod is inserted at the bottom of the lower sample tube; a grinding and pressing box is provided at the top of the detection box, and the bottom of the grinding and pressing box is connected to the crushing inner cylinder; the detection box is also provided with a detection tube placement rack slidably connected to the bottom of the detection box, and a plurality of detection tubes are embedded side by side in the detection tube placement rack. This invention can not only quickly detect sulfur dioxide in canned fruit, but also is easy to carry.

[0004] Although the above device can quickly detect sulfur dioxide and is easy to carry, it still has the following shortcomings: The above device detects sulfur dioxide in cans by acid-base titration. However, during the distillation process, some substances dissolved in water vapor may cause interference and affect the accuracy of the measurement results. At the same time, the distillation time of the acid-base titration method is relatively long, and the distillation time of different types of cans is different. It is also impossible to determine whether the sulfur dioxide in the cans is completely distilled out, which further affects the accuracy of the results. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a device for detecting sulfur dioxide in canned fruit, which can accurately measure the sulfur dioxide content in canned fruit by adopting formaldehyde absorption-pararosaniline spectrophotometry.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A device for detecting sulfur dioxide in canned fruit, comprising a device connecting frame, a spectrophotometer is arranged at one end of the device connecting frame, a device placement frame is arranged at the other end of the device connecting frame, a grinding assembly is arranged on the device placement frame, a connected chopping assembly is arranged on the grinding assembly, a reaction cup is arranged on the bottom surface of the grinding assembly, and the grinding assembly is connected to a test tube vibration assembly arranged in the middle of the device connecting frame.

[0007] Furthermore, the grinding assembly includes a grinding shell arranged on a device placement frame, an inclined grinding table is arranged inside the grinding shell, a fitting rotating grinding block is arranged on the inclined grinding table, a driving rod is arranged on the top surface of the rotating grinding block, the driving rod is arranged through the shredding assembly, a driving motor is arranged on the top surface of the driving rod, the driving motor is arranged on the top surface of the shredding assembly, a discharge port is arranged on the bottom surface of the grinding shell, and a telescopic closing plate is arranged outside the discharge port.

[0008] Furthermore, the shredding assembly comprises a shredding shell arranged on the grinding shell, a driving rod in the shredding shell is provided with a spiral blade, a feeding port is opened on the top surface of the shredding shell, and a driving motor is arranged on the top surface of the shredding shell.

[0009] Furthermore, the test tube vibration assembly includes a storage box, a mobile power supply is arranged on the bottom surface of the storage box, a heating plate is arranged on the mobile power supply, vibration blocks are evenly arranged on both sides of the storage box, the vibration block includes a vibration motor, a driving rotating plate is arranged on the top surface of the vibration motor, a motor rotating block is arranged at one end of the top surface of the driving rotating plate, a test tube placement rack is fitted and connected to the rotating block, a driven rotating block is fitted and connected to the other end of the test tube placement rack, the driven rotating block is arranged on the driven rotating plate, an auxiliary plate is arranged on the bottom surface of the driven rotating plate, and both ends of the auxiliary plate are fixedly connected to the inside of the storage box.

[0010] Furthermore, a motor shell is provided outside the driving motor, a lifting plate is provided between the driving motor and the shredding shell, electric telescopic rods are provided at the four ends of the top surface of the lifting plate, the top surface of the electric telescopic rod is provided in the motor shell, and a fitting closing block is provided at the feed inlet of the driving rod.

[0011] Furthermore, a test tube storage rack is arranged in the middle of the storage box.

[0012] Furthermore, a heat spreader is provided on the bottom surface of the reaction cup.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up the grinding component and the shredding component, the sample can be shredded first and then ground, so that the sulfur dioxide in the sample can be released to the maximum extent, avoiding incomplete reaction and affecting the accuracy of the result; by using sulfur dioxide to react with specific reagents to generate colored compounds, and then using a spectrophotometer to measure the absorbance to quantitatively analyze sulfur dioxide, it has high sensitivity and accuracy, and is more suitable for scenes with low sulfur dioxide content such as canned food.

[0014] 2. By setting up a device connection frame to place various components, it can be convenient for staff to operate and improve work efficiency; by setting up a test tube vibration component, the operator can shake the test tube in which the reaction is taking place left and right, thereby speeding up the reaction while ensuring the complete reaction, thereby ensuring the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the test tube vibration assembly after being cut apart; Figure 3 It is a schematic diagram of the three-dimensional structure of the device placement frame of the present invention and the components above after being cut open; Figure 4 For the present invention Figure 2 Schematic diagram of the three-dimensional structure after enlarging point A in the middle.

[0016] In the figure: 1, device connecting frame; 2, spectrophotometer; 3, device placement frame; 4, grinding assembly; 401, grinding shell; 402, tilting grinding table; 403, rotating grinding block; 404, driving rod; 405, driving motor; 406, discharge port; 407, telescopic closing plate; 408, motor housing; 5, chopping assembly; 501, chopping shell; 502, spiral blade; 503, feeding port; 504, discharge port; 505 , closing block; 6, reaction cup; 7, test tube vibration assembly; 701, storage box; 702, mobile power supply; 703, heating plate; 704, test tube storage rack; 8, vibration block; 801, vibration motor; 802, driving rotating plate; 803, motor rotating block; 804, test tube placement rack; 805, driven rotating block; 806, driven rotating plate; 807, auxiliary plate; 9, lifting plate; 10, electric telescopic rod; 11, heat soaking plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] like Figures 1 to 4As shown, a device for detecting sulfur dioxide in canned fruit includes a device connecting frame 1, a spectrophotometer 2 is arranged at one end of the device connecting frame 1, a device placement frame 3 is arranged at the other end of the device connecting frame 1, a grinding assembly 4 is arranged on the device placement frame 3, a connected chopping assembly 5 is arranged on the grinding assembly 4, a reaction cup 6 is arranged on the bottom surface of the grinding assembly 4, and the grinding assembly 4 is connected to a test tube vibration assembly 7 arranged in the middle of the device connecting frame 1.

[0019] like Figure 1 As shown, the sulfur dioxide detection device for canned fruit in the present invention is similar in structure to the existing sulfur dioxide detection device, such as the patent with announcement number CN109521009B which discloses a sulfur dioxide detection device for canned fruit. The main improvement of the present invention is that the sulfur dioxide content in canned fruit can be accurately measured by adopting the formaldehyde absorption-pararosaniline spectrophotometry method. Figures 1 to 4As shown, a device for detecting sulfur dioxide in canned fruit of the present invention, when in use, first prepare the sample and various reagents required for detection, then put the sample into the shredding shell 501 through the feed port 503, control the drive motor 405 to drive, at this time the drive rod 404 will drive the spiral blade 502 to shred the sample; after the shredding process is completed, control the electric telescopic rod 10 to extend and retract, so that the lifting plate 9 moves upward, and drive the drive rod 404 and the closing block 505 to move upward, then the shredded sample will fall from the feed port 503, and fall between the inclined grinding table 402 and the rotating grinding block 403; after all the samples have entered, control the electric telescopic rod 10 to move to the original position, the closing block 505 will close the feed port 503 again, and the inclined grinding table 402 will also return to the original position, and then the grinding block 403 will be rotated under the drive of the drive rod 404, so as to grind the sample into fine particles; after the grinding is completed, the telescopic closing plate 407 will shrink, and the sample will fall from The discharge port 406 falls into the reaction cup 6. At this time, the formaldehyde buffer solution in the reaction cup 6 will react with the sulfur dioxide in the sample to generate a stable hydroxymethylsulfonic acid addition compound to prevent the loss of sulfur dioxide. Then, the compound is moved into the test tube in the test tube placement rack 804, and sodium hydroxide solution and pararosaniline hydrochloride are added to generate a purple-red complex. During the reaction, the vibration motor 801 drives the driving rotating plate 802 to rotate, and the motor rotating block 803 on the driving rotating plate 802 also rotates, and drives the test tube placement rack 804 to rotate around the center of the driving rotating plate 802, so that the oscillation and shaking of the test tube can be achieved, which speeds up the reaction speed while ensuring the complete reaction and the accuracy of the result. After the reaction is completed, the generated purple-red complex is placed in the spectrophotometer 2 for measurement. The color depth of the complex is proportional to the content of sulfur dioxide, so the concentration of sulfur dioxide can be indirectly determined by measuring its absorbance, thereby achieving accurate detection of sulfur dioxide in canned fruit.

[0020] like Figure 3 As shown, the grinding assembly 4 includes a grinding shell 401 arranged on the device placement frame 3, an inclined grinding table 402 is arranged in the grinding shell 401, a fitting rotating grinding block 403 is arranged on the inclined grinding table 402, a driving rod 404 is arranged on the top surface of the rotating grinding block 403, the driving rod 404 is arranged through the shredding assembly 5, a driving motor 405 is arranged on the top surface of the driving rod 404, the driving motor 405 is arranged on the top surface of the shredding assembly 5, a discharge port 406 is arranged on the bottom surface of the grinding shell 401, and a telescopic closing plate 407 is arranged outside the discharge port 406.

[0021] like Figure 3As shown, the shredding assembly 5 includes a shredding shell 501 arranged on the grinding shell 401, a spiral blade 502 is arranged on the driving rod 404 inside the shredding shell 501, a feed port 503 is opened on the top surface of the shredding shell 501, a discharge port 504 is opened on the bottom surface of the shredding shell 501, and a driving motor 405 is arranged on the top surface of the shredding shell 501.

[0022] Specifically, when the sample needs to be processed, the sample is first placed into the shredding shell 501 through the feed port 503, and then, under the drive of the drive motor 405, the drive rod 404 will drive the spiral blade 502 to shred the sample; after the shredding process is completed, the sample will enter the grinding shell 401 from the feed port 504, and fall between the inclined grinding table 402 and the rotating grinding block 403, and then the grinding block 403 is rotated under the drive of the drive rod 404, so as to grind the sample into fine particles; after the grinding is completed, the telescopic closing plate 407 will shrink, and the sample will be able to fall from the discharge port 406 into the reaction cup 6, thereby realizing the shredding and grinding of the sample.

[0023] like Figure 2 and Figure 4 As shown, the test tube vibration assembly 7 includes a storage box 701, a mobile power supply 702 is arranged on the bottom surface of the storage box 701, a heating plate 703 is arranged on the mobile power supply 702, vibration blocks 8 are evenly arranged on both sides of the storage box 701, the vibration block 8 includes a vibration motor 801, a driving rotating plate 802 is arranged on the top surface of the vibration motor 801, a motor rotating block 803 is arranged at one end of the top surface of the driving rotating plate 802, a test tube placement rack 804 is fitted and connected to the motor rotating block 803, and the other end of the test tube placement rack 804 is fitted and connected to a driven rotating block 805, the driven rotating block 805 is arranged on one end of a driven rotating plate 806, an auxiliary plate 807 is arranged on the bottom surface of the driven rotating plate 806, and both ends of the auxiliary plate 807 are fixedly connected to the inside of the storage box 701.

[0024] Specifically, after the sample reacts with the formaldehyde buffer solution in the reaction cup 6, it will be transferred to the test tube placed in the storage box 701, and then sodium hydroxide solution and pararosaniline hydrochloride will be added to the test tube to generate a purple-red complex, which is convenient for the spectrophotometer 2 to measure; before the reaction, the test tube will be placed on the test tube rack 804, and the mobile power supply 702 will provide power to the heating plate 703, so that the heating plate 703 provides a suitable temperature for the test tube; and during the reaction process, with the cooperation of the vibration motor 801, the test tube rack 804 and the auxiliary plate 807, the test tube on the test tube rack 804 will rotate in a circle together with the motor rotating block 803 on the driving rotating plate 802 and the driven rotating block 805 on the driven rotating plate 806, so as to realize the oscillation and shaking of the test tube, thereby accelerating the reaction speed and ensuring the complete reaction.

[0025] like Figure 3 As shown, a motor housing 408 is provided outside the driving motor 405, a lifting plate 9 is provided between the driving motor 405 and the shredding housing 501, electric telescopic rods 10 are provided at the four ends of the top surface of the lifting plate 9, the top surface of the electric telescopic rod 10 is provided in the motor housing 408, and a fitting closing block 505 is provided at the discharge port 504 of the driving rod 404.

[0026] Specifically, with the cooperation of the lifting plate 9 and the electric telescopic rod 10, when the sample needs to be ground, the electric telescopic rod 10 is extended and retracted to make the lifting plate 9 move upward, and drive the driving rod 404 and the closing block 505 to move upward, and then the chopped sample can fall from the feed port 503 and fall between the inclined grinding table 402 and the rotating grinding block 403; after all the samples have entered, the electric telescopic rod 10 moves to its original position, the closing block 505 closes the feed port 503 again, and the inclined grinding table 402 returns to its original position, so that grinding can be carried out.

[0027] like Figure 2 As shown, a test tube storage rack 704 is provided in the middle of the storage box 701 for placing test tubes when not in use. There is no need to prepare a separate device for placing the test tubes, thus making rational use of space.

[0028] like Figure 3 As shown, a heat spreader 11 is disposed on the bottom of the reaction cup 6 , and such a configuration can provide a stable temperature environment for the reaction cup 6 when the reaction is being carried out.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting sulfur dioxide in canned fruit, comprising a device connecting frame (1), characterized in that: A spectrophotometer (2) is arranged at one end of the device connecting frame (1), and a device placement frame (3) is arranged at the other end of the device connecting frame (1); a grinding assembly (4) is arranged on the device placement frame (3); a connected chopping assembly (5) is arranged on the grinding assembly (4); a reaction cup (6) is arranged on the bottom surface of the grinding assembly (4); and the grinding assembly (4) is connected to a test tube vibration assembly (7) arranged in the middle of the device connecting frame (1).

2. A device for detecting sulfur dioxide in canned fruit according to claim 1, characterized in that: The grinding assembly (4) comprises a grinding shell (401) arranged on a device placement frame (3); an inclined grinding platform (402) is arranged inside the grinding shell (401); a fitting rotating grinding block (403) is arranged on the inclined grinding platform (402); a driving rod (404) is arranged on the top surface of the rotating grinding block (403); the driving rod (404) is arranged through the shredding assembly (5); a driving motor (405) is arranged on the top surface of the driving rod (404); the driving motor (405) is arranged on the top surface of the shredding assembly (5); a discharge port (406) is arranged on the bottom surface of the grinding shell (401); and a telescopic closing plate (407) is arranged outside the discharge port (406).

3. A device for detecting sulfur dioxide in canned fruit according to claim 2, characterized in that: The chopping assembly (5) comprises a chopping shell (501) arranged on a grinding shell (401); a spiral blade (502) is arranged on a driving rod (404) in the chopping shell (501); a feeding port (503) is provided on the top surface of the chopping shell (501); a discharging port (504) is provided on the bottom surface of the chopping shell (501); and the driving motor (405) is arranged on the top surface of the chopping shell (501).

4. A device for detecting sulfur dioxide in canned fruit according to claim 1, characterized in that: The test tube vibration assembly (7) comprises a storage box (701), a mobile power source (702) is arranged on the bottom surface of the storage box (701), a heating plate (703) is arranged on the mobile power source (702), vibration blocks (8) are evenly arranged on both sides of the storage box (701), the vibration blocks (8) comprise a vibration motor (801), a driving rotating plate (802) is arranged on the top surface of the vibration motor (801), a motor rotating block (803) is arranged at one end of the top surface of the driving rotating plate (802), a test tube placement rack (804) is fitted and connected to the motor rotating block (803), and a driven rotating block (805) is fitted and connected to the other end of the test tube placement rack (804), the driven rotating block (805) is arranged on one end of the driven rotating plate (806), an auxiliary plate (807) is arranged on the bottom surface of the driven rotating plate (806), and both ends of the auxiliary plate (807) are fixedly connected to the storage box (701).

5. A device for detecting sulfur dioxide in canned fruit according to claim 3, characterized in that: A motor housing (408) is arranged outside the driving motor (405), a lifting plate (9) is arranged between the driving motor (405) and the shredding housing (501), electric telescopic rods (10) are arranged at four ends of the top surface of the lifting plate (9), and the top surface of the electric telescopic rod (10) is arranged inside the motor housing (408), and a fitting closing block (505) is arranged at the feeding port (504) of the driving rod (404).

6. A device for detecting sulfur dioxide in canned fruit according to claim 4, characterized in that: A test tube storage rack (704) is arranged in the middle of the storage box (701).

7. A device for detecting sulfur dioxide in canned fruit according to claim 1, characterized in that: A heat soaking plate (11) is provided on the bottom surface of the reaction cup (6).

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