A thermal analysis device for detecting the oxidation degree of food oil

Abstract

The utility model discloses a kind of food grease oxidation degree detection's thermal analysis device, it is related to grease detection equipment technical field, including machine table, constant-temperature box installed on machine table is equipped with box cover, equidistantly be provided with through slot on the lower surface of box cover, equidistantly be provided with limiting slot on the upper surface of box cover, limiting slot is communicated with through slot, the inner bottom of limiting slot is abutted with reaction tube, equidistantly be provided with locking assembly on the upper surface of box cover, locking assembly includes the sleeve plate of being sleeved on the peripheral side of reaction tube, movable rod is installed in the lower surface of sleeve plate every corner, and the connecting barrel of movable rod peripheral side sleeve is installed on box cover;Box cover is equipped with clamping assembly.The utility model sets locking assembly, increases the stability of reaction tube on box cover, avoids reaction tube to drop due to accidental touch, efficiently carries out oxidation degree detection analysis to grease in reaction tube, and setting clamping assembly is applicable to clamping reaction tube of different diameters, improve practicality, further increase the stability of reaction tube.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil and fat testing equipment, and in particular relates to a thermal analysis device for detecting the degree of oxidation of food oils and fats. Background Technology

[0002] As an important raw material in food processing, cosmetics production, and industrial manufacturing, the quality of oils and fats directly affects product safety and usage instructions. During storage or processing, oils and fats undergo a slow reaction with oxygen, producing primary oxides such as hydroperoxides. These substances not only cause rancidity and off-flavors but also release free radicals upon decomposition, accelerating cell damage. Therefore, peroxide value, as a core indicator for measuring the degree of oil oxidation, has become an important testing procedure in food quality inspection, cosmetics quality inspection, and industrial production quality inspection. The analysis of the degree of oil oxidation requires the use of thermal analysis equipment (oil oxidation stability tester) for food oil oxidation degree detection.

[0003] A search revealed a patent document with publication number CN216560370U disclosing an instrument for testing the oxidation stability of oils and fats. The instrument includes: a housing; a constant-temperature container housed within the housing, containing a heating device for providing heat to the container; a reaction tube housed within the container, containing oils and fats, with an inlet and an outlet for introducing air; a cooling device with a detection tube containing pure water connected to the outlet; and a control device including a controller and a detection element housed within the detection tube, connected to the controller. The cooling device cools the pure water, maintaining it at the desired temperature to improve measurement accuracy.

[0004] However, existing oil oxidation stability testers still have the following shortcomings in practical use:

[0005] 1. First, a constant temperature container is installed on the chamber, and a placement plate is installed on the constant temperature container. The placement plate has a through hole, and a reaction tube is connected through the through hole. The reaction tube is filled with grease. When the staff is conducting oxidation degree detection and analysis on the grease inside the reaction tube, they may accidentally touch the reaction tube, or even cause the reaction tube to fall off, causing the grease to spill out and be wasted. At the same time, it will have an adverse effect on the work of detecting and analyzing the oxidation degree of the grease.

[0006] 2. Secondly, through holes are made on the placement plate to limit the position of the reaction tube. Since the inner diameter of the through hole is fixed, it is difficult to adjust it according to the diameter of the reaction tube. In the process of detecting and analyzing the degree of oil oxidation, the diameter of the reaction tube used varies, making it difficult to fix the reaction tubes of different diameters, thus narrowing the scope of application and reducing practicality.

[0007] To address these issues, we provide a thermal analysis device for detecting the degree of oxidation of food oils. Utility Model Content

[0008] The purpose of this invention is to provide a thermal analysis device for detecting the degree of oxidation of food oils. By setting a locking component, the stability of the reaction tube on the lid is increased, preventing accidental contact and falling off, thus enabling more efficient detection and analysis of the degree of oil oxidation. Furthermore, by setting a clamping component, it is suitable for clamping reaction tubes of different diameters, increasing the applicability and improving practicality. At the same time, it further increases the stability of the reaction tube on the lid, thereby solving the technical problems mentioned in the background art.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0010] This utility model relates to a thermal analysis device for detecting the oxidation degree of food oils, comprising a machine base, a constant temperature chamber mounted on the machine base with a chamber cover, through grooves evenly spaced on the lower surface of the chamber cover, and limit grooves evenly spaced on the upper surface of the chamber cover, the limit grooves communicating with the through grooves, a reaction tube abutting the bottom of the limit grooves, and locking components evenly spaced on the upper surface of the chamber cover, the locking components including a sleeve plate fitted around the reaction tube, and movable rods mounted at the four corners of the lower surface of the sleeve plate, the movable rods being... A connecting cylinder with a side sleeve is installed on the box cover. A movable block fixed to the lower end of the movable rod is sleeved inside the connecting cylinder. A return spring connected to the lower surface of the movable block is connected to the inner bottom of the connecting cylinder. The box cover is provided with a clamping assembly. The clamping assembly includes clamping plates symmetrically abutting against the outside of the reaction tube. A threaded block is connected to the internal thread of an internally threaded cylinder fixed to the outer wall of the clamping plate. A connecting rod is fixed to the surface of the threaded block. A connecting frame is installed between the two connecting cylinders. The connecting rod is rotatably connected to the connecting frame.

[0011] The present invention is further configured such that a cover plate is installed on the upper surface of the cooling box mounted on the upper surface of the machine tool, and detection tubes are equidistantly connected through the cover plate, and the oxygen box mounted on the upper surface of the machine tool is located on the side away from the constant temperature box.

[0012] The present invention is further configured such that an air pump is installed inside the constant temperature chamber, a main pipe connected to the air pump penetrates the inner wall of the constant temperature chamber, branch pipes are connected at equal intervals on the main pipe, the branch pipes are connected to the reaction tube, a connecting pipe is connected to the reaction tube, and the connecting pipe is connected to the detection tube.

[0013] The present invention is further configured such that a screw plug is threaded to the upper end of the connecting cylinder, and a through hole is provided on the screw plug for the movable rod to pass through.

[0014] The present invention is further configured such that a positioning rod is fixedly connected to the lower surface of the sleeve in an annular array, a sleeve seat is sleeved around the periphery of the reaction tube, and a positioning hole is formed in an annular array on the sleeve seat, through which the positioning rod passes.

[0015] The present invention is further configured such that guide rods are symmetrically fixed to the outer wall of the clamping plate, and the guide rods pass through the connecting frame.

[0016] The present invention is further configured such that the clamping plate has an arc-shaped structure and an anti-slip pad is provided on the inner wall of the clamping plate.

[0017] The present invention is further configured such that a threaded cap is threadedly connected to the internal threaded cylinder, and the threaded cap has a through hole for the connecting rod to pass through.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting a locking assembly, pulls the sleeve plate upward, stretches the return spring, moves the movable block and movable rod upward, moves the positioning rod out of the positioning hole, and the sleeve plate moves upward away from the reaction tube, releasing the fixation of the reaction tube's position, allowing the reaction tube to be removed from the cover; conversely, when the sleeve plate is released, the return spring returns to its original position, the positioning rod passes through the positioning hole, and the sleeve plate is fitted around the periphery of the reaction tube, locking reaction tubes of different heights, improving the stability of the reaction tube on the cover, preventing workers from accidentally touching the reaction tube and causing it to fall, and more efficiently detecting and analyzing the oxidation degree of the grease inside the reaction tube.

[0020] 2. This utility model, by setting up a clamping assembly, allows the threaded block to move closer to the threaded cover when the connecting rod is rotated clockwise, increasing the distance between the clamping plate and the connecting frame and decreasing the distance between the two clamping plates, thus clamping the reaction tube. Conversely, rotating the connecting rod counterclockwise increases the distance between the clamping plate and the connecting frame and increases the distance between the two clamping plates, thus releasing the reaction tube. This is suitable for clamping reaction tubes of different diameters, improving practicality and further enhancing the stability of the reaction tube on the box cover, allowing for stable detection and analysis of the oxidation degree of the grease inside the reaction tube. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 A three-dimensional schematic diagram of a thermal analysis device for detecting the degree of oxidation of food oils;

[0023] Figure 2 A schematic cross-sectional view of a thermal analysis device for detecting the degree of oxidation of food oils;

[0024] Figure 3Disassembly diagram of the lid, reaction tube, locking assembly, and clamping assembly. Figure 1 ;

[0025] Figure 4 Disassembly diagram of the lid, reaction tube, locking assembly, and clamping assembly. Figure 2 .

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1-Machine base, 101-Oxygen tank, 102-Cooling tank, 102a-Cover plate, 103-Constant temperature chamber, 103a-Box cover, 103b-Through groove, 103c-Limiting groove, 104-Detection tube, 105-Reaction tube, 105a-Sleeve, 105b-Positioning hole, 106-Air pump, 106a-Main pipe, 106b-Branch pipe, 107-Connecting pipe, 2-Locking assembly, 201-Sleeve plate, 201a-Positioning rod, 202-Modible rod, 202a-Modible block, 203-Reset spring, 204-Connecting cylinder, 204a-Screw plug, 3-Clamping assembly, 301-Connecting frame, 302-Connecting rod, 302a-Threaded block, 303-Internal threaded cylinder, 303a-Threaded cover, 304-Guide rod, 305-Clamping plate, 305a-Anti-slip pad. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] Please see Figure 1 and Figure 2 This utility model is a thermal analysis device for detecting the degree of oxidation of food oils, including a machine base 1, an oxygen tank 101, a cooling tank 102, a constant temperature chamber 103, a detection tube 104, a reaction tube 105, an air pump 106, and a connecting pipe 107. The air pump 106 introduces the gas inside the oxygen tank 101 into the reaction tube 105, causing the oil and gas to react and produce volatile organic acids. The connecting pipe 107 introduces the volatile organic acids into the detection tube 104 for ionization.

[0031] Specifically, the constant temperature chamber 103 installed on the machine 1 is equipped with a cover 103a. The lower surface of the cover 103a is provided with through grooves 103b at equal intervals. The upper surface of the cover 103a is provided with limiting grooves 103c at equal intervals. The limiting grooves 103c are connected to the through grooves 103b. The inner bottom of the limiting grooves 103c abuts against the reaction tube 105. The upper surface of the cooling chamber 102 installed on the upper surface of the machine 1 is equipped with a cover plate 102a. The cover plate 102a is provided with detection tubes 104 at equal intervals. The oxygen chamber 101 installed on the upper surface of the machine 1 is located on the side away from the constant temperature chamber 103.

[0032] Furthermore, an air pump 106 is installed inside the constant temperature chamber 103. The main pipe 106a connected to the air pump 106 penetrates the inner wall of the constant temperature chamber 103. Branch pipes 106b are connected at equal intervals on the main pipe 106a. The branch pipes 106b are connected to the reaction tube 105. A connecting pipe 107 is connected to the reaction tube 105. The connecting pipe 107 is connected to the detection tube 104.

[0033] The operation process of this embodiment is as follows: grease is placed inside the reaction tube 105, the air pump 106 is turned on, and the gas inside the oxygen tank 101 enters the reaction tube 105 through the main pipe 106a and the branch pipe 106b. The grease reacts with the gas to produce volatile organic acids. The volatile organic acids enter the cooling tank 102 through the connecting pipe 107. Water dissolves the volatile organic acids and ionizes them, thereby changing the conductivity of the water. The conductivity in the detection tube 104 is measured using a detection device and fed back to the controller. The controller determines the result. When the volatile organic acids enter the pure water, the temperature of the pure water rises. The pure water is cooled by the cooling tank 102 to maintain the pure water at the required temperature, thereby improving the accuracy of the measurement.

[0034] Example 2

[0035] Please see Figure 1 , Figure 3 and Figure 4 Based on the first specific embodiment, a locking assembly 2 is provided. The locking assembly 2 includes a sleeve plate 201, a movable rod 202, a movable block 202a, a return spring 203, and a connecting cylinder 204. When the sleeve plate 201 is pulled upward, the return spring 203 is stretched, and the sleeve plate 201 moves upward, which is suitable for locking the reaction tube 105 with a larger height. Conversely, when the sleeve plate 201 moves downward, it is suitable for locking the reaction tube 105 with a smaller height. This increases the stability of the reaction tubes 105 of different heights on the cover 103a, prevents the reaction tubes 105 from falling off, and enables more efficient detection and analysis of the degree of grease oxidation.

[0036] Specifically, the sleeve 201 is sleeved around the reaction tube 105, and movable rods 202 are installed at the four corners of the lower surface of the sleeve 201. The connecting cylinder 204 sleeved around the movable rod 202 is installed on the box cover 103a. The movable block 202a fixed to the lower end of the movable rod 202 is sleeved inside the connecting cylinder 204. The return spring 203 connected to the lower surface of the movable block 202a is connected to the inner bottom of the connecting cylinder 204.

[0037] Furthermore, the upper end of the connecting cylinder 204 is threaded with a screw plug 204a, and the screw plug 204a has a through hole for the movable rod 202 to pass through. The lower surface of the sleeve plate 201 is fixedly connected with a positioning rod 201a in an annular array. The periphery of the reaction tube 105 is sleeved with a sleeve seat 105a, and the sleeve seat 105a has a positioning hole 105b in an annular array. The positioning rod 201a passes through the positioning hole 105b.

[0038] The operation process of this embodiment is as follows: Pull the sleeve plate 201 upward, the movable rod 202 moves upward, the movable block 202a moves upward in the connecting cylinder 204, the return spring 203 is stretched, the positioning rod 201a moves upward until the positioning rod 201a moves out of the positioning hole 105b, the sleeve plate 201 moves upward until it is disengaged from the reaction tube 105, the fixation of the position of the reaction tube 105 is released, and an upward pull is applied to the reaction tube 105 to move the reaction tube 105 upward until the reaction tube 105 is disengaged from the limiting groove 103c, and the reaction tube 105 is removed from the box cover 103a; conversely, the reaction tube 105 is removed from the box cover 103a. A downward force is applied to tube 105, causing it to move downward until the lower part of tube 105 is inserted into the limiting groove 103c. The sleeve plate 201 is released, and the stretched return spring 203 gradually returns to its original position. The movable block 202a moves downward within the connecting cylinder 204, driving the movable rod 202 to move downward. The sleeve plate 201 moves downward, and at the same time, the positioning rod 201a moves downward until it passes through the positioning hole 105b. The sleeve plate 201 moves downward to the lowest point and is fitted around the periphery of the reaction tube 105, locking the position of the reaction tube 105 on the cover 103a.

[0039] Example 3

[0040] Please see Figure 1 , Figure 3 and Figure 4Based on specific embodiments one and two, a clamping assembly 3 is provided. The clamping assembly 3 includes a connecting frame 301, a connecting rod 302, a threaded block 302a, an internal threaded cylinder 303, and a clamping plate 305. When the connecting rod 302 is rotated clockwise, the threaded block 302a rotates clockwise and moves closer to the threaded cap 303a, reducing the distance between the two clamping plates 305, which is suitable for clamping reaction tubes 105 with small outer diameters. Conversely, when the connecting rod 302 is rotated clockwise, the distance between the two clamping plates 305 increases, which is suitable for clamping reaction tubes 105 with large outer diameters, thus expanding the scope of application.

[0041] Specifically, two clamping plates 305 are symmetrically abutted against the outside of the reaction tube 105. The internal threaded cylinder 303 fixed to the outer wall of the clamping plate 305 is connected to a threaded block 302a. A connecting rod 302 is fixed to the surface of the threaded block 302a. A connecting frame 301 is installed between the two connecting cylinders 204. The connecting rod 302 is rotatably connected to the connecting frame 301.

[0042] Furthermore, guide rods 304 are symmetrically fixed to the outer wall of the clamping plate 305, the guide rods 304 pass through the connecting frame 301, the clamping plate 305 has an arc-shaped structure, the inner wall of the clamping plate 305 is provided with an anti-slip pad 305a, the internal threaded cylinder 303 is threadedly connected with a threaded cap 303a, and the threaded cap 303a is provided with a through hole for the connecting rod 302 to pass through.

[0043] The operation process of this embodiment is as follows: Rotate the connecting rod 302 clockwise. The connecting rod 302 rotates clockwise, driving the threaded block 302a to rotate clockwise. At the same time, the threaded block 302a moves towards the threaded cap 303a, thereby pushing the internal threaded cylinder 303 towards the reaction tube 105. This causes the clamping plate 305 to move towards the reaction tube 105. The guide rod 304 moves with the clamping plate 305, bringing the two clamping plates 305 closer together, thereby reducing the distance between the two clamping plates 305 and clamping the reaction tube 105. This is suitable for fixing the position of reaction tubes 105 with smaller diameters; conversely... Rotating the connecting rod 302 counterclockwise causes the threaded block 302a to rotate counterclockwise, simultaneously moving the threaded block 302a away from the threaded cover 303a. This causes the internal threaded cylinder 303 to move closer to the connecting frame 301, and the clamping plate 305 to move closer to the connecting frame 301. The guide rod 304 moves with the clamping plate 305 closer to the connecting frame 301, causing the two clamping plates 305 to move in opposite directions, increasing the distance between the two clamping plates 305, and loosening the clamped reaction tube 105. This method is suitable for fixing the position of reaction tubes with larger diameters.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A thermal analysis device for detecting the degree of oxidation of food oils, comprising a machine base (1), a constant temperature chamber (103) mounted on the machine base (1) having a chamber cover (103a) mounted thereon, through grooves (103b) evenly spaced on the lower surface of the chamber cover (103a), and limiting grooves (103c) evenly spaced on the upper surface of the chamber cover (103a), the limiting grooves (103c) communicating with the through grooves (103b), and a reaction tube (105) abutting the inner bottom of the limiting grooves (103c), characterized in that: The upper surface of the box cover (103a) is provided with locking components (2) at equal intervals. The locking components (2) include a sleeve plate (201) sleeved around the reaction tube (105). Movable rods (202) are installed at the four corners of the lower surface of the sleeve plate (201). A connecting cylinder (204) sleeved around the periphery of the movable rod (202) is installed on the box cover (103a). A movable block (202a) fixed to the lower end of the movable rod (202) is sleeved inside the connecting cylinder (204). A return spring (203) connected to the lower surface of the movable block (202a) is connected to the inner bottom of the connecting cylinder (204).

2. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 1, characterized in that: The box cover (103a) is provided with a clamping assembly (3). The clamping assembly (3) includes a clamping plate (305) symmetrically abutting against the outside of the reaction tube (105). The internal thread of the internal threaded cylinder (303) fixed to the outer wall of the clamping plate (305) is connected to a threaded block (302a). A connecting rod (302) is fixed to the surface of the threaded block (302a). A connecting frame (301) is installed between the two connecting cylinders (204). The connecting rod (302) is rotatably connected to the connecting frame (301). The upper surface of the cooling box (102) installed on the upper surface of the machine (1) is covered with a cover plate (102a), and detection tubes (104) are equidistantly connected on the cover plate (102a). The oxygen box (101) installed on the upper surface of the machine (1) is located on the side away from the constant temperature box (103).

3. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 2, characterized in that: An air pump (106) is installed inside the constant temperature chamber (103). A main pipe (106a) connected to the air pump (106) penetrates the inner wall of the constant temperature chamber (103). Branch pipes (106b) are connected at equal intervals on the main pipe (106a). The branch pipes (106b) are connected to the reaction tube (105). A connecting pipe (107) is connected to the reaction tube (105). The connecting pipe (107) is connected to the detection tube (104).

4. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 2, characterized in that: The upper end of the connecting cylinder (204) is threaded with a screw plug (204a), and the screw plug (204a) has a through hole for the movable rod (202) to pass through.

5. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 2, characterized in that: The lower surface of the sleeve (201) is fixed with a positioning rod (201a) in an annular array. The reaction tube (105) is sleeved with a base (105a) on its periphery. The base (105a) has a positioning hole (105b) in an annular array. The positioning rod (201a) passes through the positioning hole (105b).

6. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 2, characterized in that: Guide rods (304) are symmetrically fixed to the outer wall of the clamping plate (305), and the guide rods (304) pass through the connecting frame (301).

7. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 6, characterized in that: The clamping plate (305) has an arc-shaped structure, and the inner wall of the clamping plate (305) is provided with an anti-slip pad (305a).

8. The thermal analysis device for detecting the degree of oxidation of food oils according to claim 2, characterized in that: The internal threaded cylinder (303) is threadedly connected to a threaded cap (303a), and the threaded cap (303a) has a through hole for the connecting rod (302) to pass through.

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