An inspection device for inspecting peroxide value in food

Abstract

The application belongs to the technical field of food inspection, and is especially a testing device for testing peroxide value in food. The device comprises a stoppered iodine flask and a stopper. A support plate is mounted on the inner wall of the stoppered iodine flask. A sliding pipe is slidably connected to the center of the support plate. A cover plate is arranged on the top of the sliding pipe. A connecting head block is arranged on the top center of the cover plate. A connecting pipe is slidably connected to the center of the stopper. The bottom of the connecting pipe is clamped with the connecting head block. A support ring is mounted on the inner wall of the stoppered iodine flask. The support plate and the slidable sliding pipe are arranged on the inner wall of the stoppered iodine flask. The water for leak detection is blocked above the cavity of the support plate, so that the moisture is prevented from entering the detection area, the drying workload is reduced, the residual moisture is prevented from diluting the sample and the reagent, the detection system error is reduced, the connecting pipe is clamped with the connecting head block, the cover plate can be opened and closed synchronously with the stopper, the elastic sealing structure above the support ring cooperates with the cover plate to seal the sliding pipe, and the accuracy of the detection result is improved.

Description

Technical Field

[0001] This invention belongs to the field of food inspection technology, and specifically relates to a testing device for testing the peroxide value in food. Background Technology

[0002] Food peroxide value is a core indicator reflecting the degree of oxidation of fats and oils in food. Currently, laboratories commonly use iodometric titration for this test. Stoppered iodine flasks are the standard instruments used to hold the reaction system in this method. In actual testing, stoppered iodine flasks need to undergo a leak test before use to verify their tightness. During the leak test, water can easily enter the reaction area inside the flask. Afterward, the inside of the flask needs to be completely dried. This involves many steps. In addition, conventional stoppered iodine flasks achieve a seal through the fit between the ground glass stopper and the flask mouth. During the light-protected reaction and titration process, there is a certain possibility that the iodine in the reaction system may volatilize and escape, which can affect the accuracy of the test results. Volatile reagents can also diffuse into the operating environment. Summary of the Invention

[0003] To address the above problems, the present invention aims to provide a testing device for testing the peroxide value in food, thereby solving the aforementioned issues.

[0004] To achieve the above objectives, a testing device for testing the peroxide value in food includes a stoppered iodine flask and a stopper. A support plate is installed on the inner wall of the stoppered iodine flask. A sliding tube is slidably connected to the center of the support plate. A cover plate is provided at the top of the sliding tube. A connecting head block is provided at the center of the top of the cover plate. A connecting tube is slidably connected to the center of the stopper. The bottom of the connecting tube engages with the connecting head block. A support ring is installed on the inner wall of the stoppered iodine flask. A lower mounting ring is supported above the support ring. An upper mounting ring is provided above the lower mounting ring. Several equidistant uprights are installed on the upper mounting ring. Springs are sleeved on the outer wall of each upright.

[0005] Preferably, the bottom of the upright extends through the lower mounting ring and the support ring, and both ends of the spring are connected to the upper mounting ring and the lower mounting ring, respectively.

[0006] Preferably, a support ring is installed on the outer wall of the slide tube, and the support ring is in contact with the center of the support plate.

[0007] Preferably, a sealing sleeve is installed at the center of the plug, and the outer wall of the connecting tube is slidably connected to the inner wall of the sealing sleeve.

[0008] Preferably, an adjusting rod is installed at the top of the connecting tube, and a rotating ring is installed at the top of the plug. The adjusting rod is slidably connected to the rotating ring via a slider.

[0009] Preferably, a limit rod is installed on the inner wall of the rotating ring, and the outer wall of the slider matches the limit rod.

[0010] Preferably, a sealing ring is installed at the connection between the top of the slide tube and the bottom of the cover plate.

[0011] The present invention has the following beneficial effects: By installing a support plate and a sliding tube on the inner wall of the stoppered iodine flask, the water used for leak testing can be blocked in the cavity above the support plate, preventing water from entering the detection area, reducing the amount of drying work, preventing residual water from diluting the sample and reagents, and reducing the error of the detection system. The connecting tube and the connecting head block engage, allowing the cover to open and close synchronously with the stopper. The elastic sealing structure above the support ring, together with the cover, seals the sliding tube, forming multiple sealing barriers at the bottle mouth, reducing the volatilization of iodine during the reaction, improving the accuracy of the detection results, and reducing the risk of exposure to harmful reagents to operators. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the iodine flask with a stopper in this invention. Figure 3 This is a schematic cross-sectional view of the plug in this invention. Figure 1 ; Figure 4 This is a schematic cross-sectional view of the plug in this invention. Figure 2 .

[0013] In the diagram: 1. Iodine flask with stopper; 11. Stopper; 2. Support plate; 21. Slide tube; 211. Support ring; 212. Sealing ring; 22. Cover plate; 23. Connecting head block; 24. Connecting tube; 25. Sealing sleeve; 26. Rotating ring; 27. Adjusting rod; 28. Sliding block; 281. Limiting rod; 3. Support ring; 31. Upper mounting ring; 311. Lower mounting ring; 32. Upright rod; 33. Spring. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0015] Example 1: like Figure 1—4 shows: The present invention provides the following technical solution: including a stoppered iodine flask 1 and a stopper 11, a support plate 2 is installed on the inner wall of the stoppered iodine flask 1, a slide tube 21 is slidably connected to the center of the support plate 2, a cover plate 22 is provided on the top of the slide tube 21, a connecting head block 23 is provided at the center of the top of the cover plate 22, a connecting tube 24 is slidably connected to the center of the stopper 11, the bottom of the connecting tube 24 is engaged with the connecting head block 23, a support ring 3 is installed on the inner wall of the stoppered iodine flask 1, a lower mounting ring 311 is supported above the support ring 3, an upper mounting ring 31 is provided above the lower mounting ring 311, a plurality of equally spaced uprights 32 are installed on the upper mounting ring 31, and springs 33 are sleeved on the outer wall of the uprights 32.

[0016] In this implementation plan: Before using the stoppered iodine flask 1 to test the peroxide value, it is necessary to check the sealing performance of the stoppered iodine flask 1. The main check is whether the stopper 11 is sealed after connection. Conventionally, this is done by injecting water into the stoppered iodine flask 1 and then inverting it to check for water leakage at the connection between the stopper 11 and the stoppered iodine flask 1. This device can slide the sliding tube 21, which is slidably connected to the inner wall of the support plate 2, upward during the sealing test, so that the top of the sliding tube 21 protrudes from the mouth of the stoppered iodine flask 1. This prevents water from entering the sliding tube when water is injected into the stoppered iodine flask 1. The water is positioned inside the slide tube 21, thus preventing water from entering the bottom of the stoppered iodine flask 1. The water is kept in the cavity above the support plate 2 and outside the slide tube 21, reducing the subsequent drying work required for the internal testing area of ​​the stoppered iodine flask 1 and preventing residual moisture from diluting the sample and affecting the test results. The connecting tube 24 rotates and engages with the connecting head block 23 installed at the top center of the cover plate 22, stably fixing the cover plate 22 below the stopper 11. The stopper 11 is then pressed against the mouth of the stoppered iodine flask 1. At this point, the cover plate 22 pushes the slide tube 21 down first, allowing the support ring 211 to be supported by the support plate 21. At the center position, and at this time, the bottom of the stopper 11 is pressed against the sealing structure consisting of the upper mounting ring 31, the upright rod 32, the lower mounting ring 311, and the spring 33 installed above the support ring 3. While forming a seal between the stopper 11 and the stoppered iodine flask 1, the support ring 3 is at a fixed height, and the lower mounting ring 311 is supported on the support ring 3. The upright rod 32, which is slidably connected to the support ring 3 and the lower mounting ring 311, provides elastic support to the upper mounting ring 31 through the spring 33 sleeved on the outer wall. This allows the upper mounting ring 31 to be pressed against the bottom of the stopper 11, and the upper mounting ring 31 and the stoppered iodine flask... 1. The inner wall is fitted to increase the sealing effect. At this time, the top opening of the slide tube 21 is sealed by the cover plate 22. While the stoppered iodine bottle 1 is inverted to check the sealing of the stoppered iodine bottle 1 and the stopper 11, water can be prevented from entering the bottom of the inner cavity of the stoppered iodine bottle 1 through the slide tube 21. At the same time, the support plate 2 and the slide tube 21 can block the water in the detection area of ​​the stoppered iodine bottle 1 to prevent dilution of the test sample. After the stopper 11 is separated, it can drive the cover plate 22 to separate simultaneously, so that the dropper can pass through the slide tube 21 to drip the test sample into the bottom of the stoppered iodine bottle 1 for peroxide value detection of food.

[0017] The bottom of the upright 32 passes through the lower mounting ring 311 and the support ring 3. The two ends of the spring 33 are connected to the upper mounting ring 31 and the lower mounting ring 311, respectively. The bottom of the upright 32 passes through the lower mounting ring 311 and the support ring 3, so that the upper mounting ring 31 and the lower mounting ring 311 can slide stably relative to each other along the axial direction of the upright 32. There will be no uneven circumferential sealing gap caused by radial offset. This ensures that the sealing pressure of the upper mounting ring 31 is uniform and consistent, and avoids the sealing failure caused by excessive local gaps. The two ends of the spring 33 are connected to the upper mounting ring 31 and the lower mounting ring 311, respectively. After the stopper 11 is removed, it can automatically push the upper mounting ring 31 to return to its original position. At the same time, it ensures that the elastic force is released evenly during the downward pressing process, so that the contact pressure between the upper mounting ring 31 and the bottom of the stopper 11 is consistent. This further enhances the sealing effect at the bottle mouth and also avoids the component misalignment and jamming affecting the normal opening and closing operation of the device.

[0018] A support ring 211 is installed on the outer wall of the slide tube 21, and the support ring 211 fits in center with the support plate 2. The support ring 211 slides up and down synchronously with the slide tube 21 to prevent the slide tube 21 from accidentally falling out of the center of the support plate 2 and causing the component to fall and contaminate the sample. It can also fill the sliding gap between the slide tube 21 and the support plate 2, improve the sealing performance of the joint between the two, and prevent moisture from leaking from the sliding gap to the detection chamber below during the leak test, thus ensuring the dryness of the detection area.

[0019] A sealing sleeve 25 is installed at the center of the plug 11, and the outer wall of the connecting tube 24 is slidably connected to the inner wall of the sealing sleeve 25. The sealing sleeve 25 can guide the sliding of the connecting tube 24, ensuring that the connecting tube 24 is always in the center position of the plug 11 during the lifting and lowering process. This makes the alignment of the connecting tube 24 and the connecting head block 23 more accurate when they are engaged, and the docking can be completed quickly without repeated adjustments. At the same time, it fills the assembly gap between the connecting tube 24 and the plug 11, improving the sealing performance at the center of the plug 11.

[0020] An adjusting rod 27 is installed on the top of the connecting pipe 24, and a rotating ring 26 is installed on the top of the plug 11. The adjusting rod 27 is slidably connected to the rotating ring 26 through the slider 28. The adjusting rod 27 facilitates the smooth rotation of the connecting pipe 24 along the center of the rotating ring 26, and facilitates the adjustment of the threaded connection between the connecting pipe 24 and the connecting head block 23, and the installation or separation of the cover plate 22.

[0021] A limiting rod 281 is installed on the inner wall of the rotating ring 26, and the outer wall of the slider 28 matches the limiting rod 281. The limiting rod 281 can limit the sliding of the slider 28, prevent the connecting pipe 24 from shifting and causing the cover plate 22 to misalign, improve the overall stability of the structure operation, and ensure the consistency of the sealing effect.

[0022] A sealing ring 212 is installed at the connection between the top of the slide tube 21 and the bottom of the cover plate 22. When the cover plate 22 is pressed down with the plug 11 and fits against the top end face of the slide tube 21, the sealing ring 212 can fill the micro gap between the mating end faces of the two, further improving the sealing effect at the top opening of the slide tube 21, completely blocking the seepage of the test water into the internal channel of the slide tube 21, avoiding the influence of water residue on the subsequent test reaction, and reducing the water removal process, so that the peroxide value test step can be carried out quickly.

[0023] The working principle of this technical solution is as follows: When in use, first slide the slide tube 21 upwards along the center of the support plate 2 to the top of its stroke. Inject an appropriate amount of leak-testing water into the mouth of the stoppered iodine flask 1. The water flow is blocked by the side wall of the slide tube 21 and remains in the annular cavity above the support plate 2. Engage the connecting tube 24 below the stopper 11 with the connecting head block 23 at the top of the cover plate 22, fixing the cover plate 22 below the stopper 11. Press the stopper 11 downwards to fasten it at the mouth of the stoppered iodine flask 1. During the pressing process, the bottom surface of the cover plate 22 contacts the top of the slide tube 21 first and pushes the slide tube 21 downwards synchronously. At the same time, the bottom end face of the stopper 11 presses against the mounting ring 31, causing the spring 33 to move along the upright rod 32. Axial compression deformation, relying on the rebound force of spring 33, makes the upper mounting ring 31 tightly abut against the bottom of the stopper 11 to form a circumferential seal. The stoppered iodine bottle 1 is inverted and left to stand to observe whether there is water leakage at the connection. After completing the sealing test, the stoppered iodine bottle 1 is placed upright and the stopper 11 is removed upwards. The cover plate 22 is simultaneously removed from the top of the slide tube 21 along with the stopper 11. The tip of the burette is passed through the central channel of the slide tube 21 and dripped into the bottom of the stoppered iodine bottle 1 with the oil sample to be tested and the reaction reagent. The stopper 11 is closed again and left to stand in the dark for reaction. After the reaction is completed, the stopper 11 is opened and the indicator is added. The titration operation is continued through the central channel of the slide tube 21 to complete the detection of food peroxide value.

[0024] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A testing device for testing the peroxide value in food, comprising a stoppered iodine flask (1) and a stopper (11), characterized in that, The stoppered iodine flask (1) has a support plate (2) installed on its inner wall. A sliding tube (21) is slidably connected to the center of the support plate (2). A cover plate (22) is provided at the top of the sliding tube (21). A connecting head block (23) is provided at the center of the top of the cover plate (22). A connecting tube (24) is slidably connected to the center of the stopper (11). The bottom of the connecting tube (24) is engaged with the connecting head block (23). A support ring (3) is installed on the inner wall of the stoppered iodine flask (1). A lower mounting ring (311) is supported above the support ring (3). An upper mounting ring (31) is provided above the lower mounting ring (311). Several equidistant uprights (32) are installed on the upper mounting ring (31). A spring (33) is sleeved on the outer wall of the uprights (32).

2. The testing device for testing peroxide value in food according to claim 1, characterized in that: The bottom of the upright (32) passes through the lower mounting ring (311) and the support ring (3), and the two ends of the spring (33) are respectively connected to the upper mounting ring (31) and the lower mounting ring (311).

3. The testing device for testing peroxide value in food according to claim 1, characterized in that: The outer wall of the slide tube (21) is fitted with a support ring (211), which is in contact with the center of the support plate (2).

4. The testing device for testing peroxide value in food according to claim 1, characterized in that: A sealing sleeve (25) is installed at the center of the plug (11), and the outer wall of the connecting tube (24) is slidably connected to the inner wall of the sealing sleeve (25).

5. The testing device for testing peroxide value in food according to claim 1, characterized in that: An adjusting rod (27) is installed on the top of the connecting tube (24), and a rotating ring (26) is installed on the top of the plug (11). The adjusting rod (27) is slidably connected to the rotating ring (26) through a slider (28).

6. The testing device for testing peroxide value in food according to claim 5, characterized in that: The inner wall of the rotating ring (26) is fitted with a limiting rod (281), and the outer wall of the slider (28) is matched with the limiting rod (281).

7. The testing device for testing peroxide value in food according to claim 1, characterized in that: A sealing ring (212) is installed at the connection between the top of the slide tube (21) and the bottom of the cover plate (22).

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