Visual acid value dropping point detection device

Abstract

The utility model relates to the technical field of acid value detection, in particular to a visual acid value dropping point detection device. The technical problems that in order to ensure the accuracy of a detection result, most of existing acid value detection adopts a closed environment for detection, external interference is avoided, but the interior of acid value detection cannot be seen, and an operator possibly cannot find abnormal conditions in time, so that the accuracy of an experimental result is influenced are solved. According to the technical scheme, the visual acid value dropping point detection device comprises a cabinet body, a display panel, a detection bin, a clamping assembly and a dropping point assembly, a test tube is placed between two sets of arc-shaped clamping plates, the arc-shaped clamping plates are rotationally connected with connecting columns through second connecting rotating shafts through driving of a driver, arc-shaped rubber pads are driven to continuously get close to and be attached to the test tube, and the dropping point assembly is arranged on the test tube. The friction force can be increased through the arc-shaped rubber pad, and the situation that the test tube slides off in the shaking detection process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of acid value detection, in particular to a visual acid value and dropping point detection device. Background Technique

[0002] Acid value and dropping point detection is a chemical analysis method used to measure the content of free acid in organic substances such as oils and fats, polyesters, and paraffins. Specifically, the acid value refers to the number of milligrams of potassium hydroxide required to neutralize 1 gram of the sample under the test conditions. This method is commonly implemented by acid-base titration, and a suitable indicator such as phenolphthalein is selected to determine the titration end point. In the determination of the acid value of oil products, an acid value and dropping point detection device will be used. In addition, the size of the acid value of oil products can reflect the amount of free acid content in the oil products, and thus can be used to judge the refining degree of new oil or the oxidation and deterioration of old oil. In order to ensure the accuracy of the detection results, most of the existing acid value detections are carried out in a closed environment to avoid external interference. However, the inside of the acid value detection cannot be seen, and the operator may not be able to detect abnormal situations in time, thus affecting the accuracy of the experimental results. Therefore, we propose a visual acid value and dropping point detection device to solve the problems mentioned above. Content of the Utility Model

[0003] In order to overcome the problem that in order to ensure the accuracy of the existing acid value detection, most of them are carried out in a closed environment to avoid external interference, but the inside of the acid value detection cannot be seen, and the operator may not be able to detect abnormal situations in time, thus affecting the accuracy of the experimental results.

[0004] The technical solution of the utility model is: a visual acid value and dropping point detection device, which includes a cabinet body, a display panel, a detection chamber, a clamping assembly and a dropping point assembly; a display panel for real-time monitoring of the internal situation of the detection chamber is installed on one side of the upper end of the cabinet body. On one side of the display panel, there is a detection chamber for providing a closed environment for acid value and dropping point detection and fixedly connected to the cabinet body at the lower end. On one side inside the detection chamber, there is a clamping assembly for clamping and placing a container with a fixed amount of sample and an appropriate amount of phenolphthalein indicator and driving it to shake slightly. On one side inside the detection chamber, there is a dropping point assembly for dripping a known concentration of sodium hydroxide solution into the container drop by drop. One side of the detection chamber is provided with an opening and closing plate, and a transparent glass plate for facilitating the operator to directly observe the internal situation is installed in the middle of the opening and closing plate. Micro cameras are installed near the corners above the inner side of the detection chamber.

[0005] Preferably, during the detection process, the operator can directly observe the internal situation of the detection chamber through the transparent glass plate, or through the function of multiple micro cameras, monitor the interior of the detection chamber from multiple angles, and then transmit the images to the display panel for recording and viewing, which is convenient for the operator to observe the acid value and dropping point detection process. Thus, the operator can promptly discover abnormal situations and make adjustments in a timely manner. At the same time, the process is recorded, which is convenient for multiple viewings, continuously improving the detection technology, and enhancing the accuracy of the experimental results.

[0006] Preferably, on both sides of one side of the cabinet body, first connecting rotating shafts are installed. On the side of the cabinet body where the first connecting rotating shafts are installed, rotating doors are symmetrically arranged horizontally. The rotating doors are rotationally connected to the cabinet body through the first connecting rotating shafts. On the side of the rotating door away from the first connecting rotating shaft, a first handle is installed. By pulling the first handle, the rotating door rotates and opens with the cabinet body through the first connecting rotating shaft, which is convenient for placing the items required for detection in the cabinet body, facilitating use and retrieval at any time, and improving the practicality of the acid value and dropping point detection device.

[0007] Preferably, a rotating shaft is installed on one side of the opening and closing plate. The opening and closing plate is rotationally connected to the detection chamber through the rotating shaft. On the side of the opening and closing plate away from the rotating shaft, a second handle is installed. On the edge of the side of the opening and closing plate close to the detection chamber, a U-shaped sealing ring for enhancing the sealing performance is installed. On one side of the inner wall of the detection chamber, a rectangular notch for installing a clamping component is provided. By pulling the second handle, the opening and closing plate rotates and opens with the detection chamber through the rotating shaft. Then, a quantitative sample and an appropriate amount of phenolphthalein indicator are successively placed into the test tube. Then, a sodium hydroxide solution with a known concentration is poured into the burette. Finally, by pushing the second handle, the U-shaped sealing ring drives the opening and closing plate to fit and connect with the inner wall of the detection chamber. The U-shaped sealing ring can enhance the sealing performance and prevent the detection process from being interfered by the external environment. Then, the operator can directly observe the internal situation of the detection chamber through the transparent glass plate, or through the function of multiple micro cameras, monitor the interior of the detection chamber from multiple angles, and then transmit the images to the display panel for recording and viewing, which is convenient for the operator to observe the acid value and dropping point detection process. Thus, the operator can promptly discover abnormal situations and make adjustments in a timely manner. At the same time, the process is recorded, which is convenient for multiple viewings, continuously improving the detection technology, and enhancing the accuracy of the experimental results.

[0008] Preferably, the clamping assembly includes a first cylinder, a rectangular telescopic sleeve, a first telescopic column, a rotating column, a motor, a connecting column, a second connecting rotating shaft, an arc-shaped clamping plate, an arc-shaped rubber pad, and a test tube. The rectangular telescopic sleeve is fixedly connected to the detection chamber through a rectangular notch. One end of the rectangular telescopic sleeve is equipped with a first cylinder. The first telescopic column is sleeved inside the rectangular telescopic sleeve. One end of the first telescopic column away from the rectangular telescopic sleeve is equipped with a rotating column. The upper end of the rotating column is equipped with a motor. After the detection chamber is opened, pick up the test tube, pour a fixed amount of sample and an appropriate amount of phenolphthalein indicator into it in sequence. Then place the test tube between the two arc-shaped clamping plates. Driven by the driver, the arc-shaped clamping plate is rotatably connected to the connecting column through the second connecting rotating shaft, driving the arc-shaped rubber pad to continuously approach and fit the test tube to fix and clamp it. The arc-shaped rubber pad can increase the friction force to prevent the test tube from slipping during the detection and shaking process. After the test tube is fixed, close the opening and closing plate. Then, according to the position of the burette, driven by the first cylinder, the first telescopic column drives the test tube to move horizontally along the rectangular telescopic sleeve to a suitable position. Then, driven by the motor, the connecting column rotates to a suitable angle through the rotating column and the first telescopic column, so that the test tube is directly below the burette.

[0009] Preferably, the connecting column is rotatably connected to the first telescopic column through the rotating column. On the side of the connecting column away from the rotating column, two second connecting rotating shafts are symmetrically installed horizontally. The upper ends of the second connecting rotating shafts are equipped with drivers. The arc-shaped clamping plate is rotatably connected to the connecting column through the second connecting rotating shaft. An arc-shaped rubber pad for increasing the friction force is installed on the inner side of the arc-shaped clamping plate. A test tube is arranged between the two arc-shaped clamping plates. When a drop of sodium hydroxide solution with a known concentration is dropped into the test tube, driven by the motor, the connecting column is rotatably connected to the first telescopic column through the rotating column, thereby driving the test tube to shake gently to fully mix the reagents. Then repeat the above operation to make the test tube directly below the burette again. Repeat multiple times until the color of the solution in the test tube changes from colorless to pink and remains for a period of time, about 30 seconds without fading. This marks the end point of the titration. By recording the volume of the titrant consumed during the titration process, according to the concentration and volume of the titrant, the acid value of the sample can be calculated.

[0010] Preferably, the dropping point assembly includes a second telescopic column, an L-shaped telescopic sleeve, a second cylinder, a burette, a telescopic valve, and an electromagnetic control valve. The upper end of the L-shaped telescopic sleeve is equipped with a second cylinder. The second telescopic column with the lower end fixedly connected to the cabinet body is sleeved inside the L-shaped telescopic sleeve. When the test tube is directly below the burette, driven by the second cylinder, the L-shaped telescopic sleeve drives the burette to move downward along the second telescopic column until the burette extends into the test tube to prevent the sodium hydroxide solution from splashing out. Then, driven by the second cylinder, the L-shaped telescopic sleeve drives the burette to move upward to facilitate the test tube to shake gently. Then repeat the above operation to drop a drop of sodium hydroxide solution into the test tube.

[0011] Preferably, a burette is installed at one end of the L-shaped telescopic sleeve away from the second telescopic column. An expansion valve is sleeved outside the lower end of the burette, and an electromagnetic control valve is installed on one side outside the expansion valve. Then, through the operation of the display panel and the control of the electromagnetic control valve, the expansion valve slowly contracts, causing a drop of sodium hydroxide solution in the burette to drip into the test tube. Then, the expansion valve quickly closes to prevent excess sodium hydroxide solution from dripping out and affecting the test results.

[0012] Advantages of the present utility model:

[0013] 1. In the past, for acid value detection to ensure accurate test results, a closed environment was mostly used for detection to avoid external interference. However, the inside of the acid value detection could not be seen, and operators might not be able to detect abnormal situations in a timely manner, thus affecting the accuracy of the experimental results. Different from this, during the detection process, operators can directly observe the inside of the detection chamber through a transparent glass plate, or through the action of multiple micro-cameras, monitor the inside of the detection chamber from multiple angles, and then transmit the images to the display panel for recording and viewing. This facilitates operators to observe the process of acid value drop point detection. Thus, operators can detect abnormal situations in a timely manner, make adjustments in a timely manner, and at the same time, the process is recorded, which is convenient for multiple viewings, continuously improving the detection technology, and improving the accuracy of experimental results.

[0014] 2. Place the test tube between two groups of arc-shaped clamping plates. Through the drive of the driver, the arc-shaped clamping plates are rotationally connected to the connecting column through the second connecting shaft, driving the arc-shaped rubber pads to continuously approach and fit the test tube to fix and clamp it. The arc-shaped rubber pads can increase the friction force to prevent the test tube from slipping during the detection and shaking process. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the detection chamber of the present utility model;

[0017] Figure 3 is a schematic diagram of the structure of the clamping assembly of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the drop point assembly of the present utility model.

[0019] Description of reference numerals: 1, cabinet body; 2, display panel; 3, detection chamber; 4, clamping assembly; 5, dropping point assembly; 101, first connecting rotating shaft; 102, rotating door; 103, first handle; 301, opening and closing plate; 302, second handle; 303, U-shaped sealing ring; 304, transparent glass plate; 305, rotating shaft; 306, micro camera; 307, rectangular notch; 401, first cylinder; 402, rectangular telescopic sleeve; 403, first telescopic column; 404, rotating column; 405, motor; 406, connecting column; 407, second connecting rotating shaft; 408, arc-shaped clamping plate; 409, arc-shaped rubber pad; 410, test tube; 501, second telescopic column; 502, L-shaped telescopic sleeve; 503, second cylinder; 504, burette; 505, telescopic valve; 506, electromagnetic control valve. Detailed implementation mode

[0020] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Please refer to Figure 1 , the present utility model provides an embodiment: a visual acid value dropping point detection device, including a cabinet body 1, a display panel 2, a detection chamber 3, a clamping assembly 4 and a dropping point assembly 5; a display panel 2 for real-time monitoring of the internal situation of the detection chamber 3 is installed on one side of the upper end of the cabinet body 1, a detection chamber 3 for providing a closed environment for acid value dropping point detection and fixedly connected to the cabinet body 1 at the lower end is arranged on one side of the display panel 2, a clamping assembly 4 for clamping and placing a container with a fixed amount of sample and an appropriate amount of phenolphthalein indicator and driving it to shake slightly is installed on one side of the inside of the detection chamber 3, a dropping point assembly 5 for dripping a known concentration of sodium hydroxide solution into the container drop by drop is installed on one side of the inside of the detection chamber 3, an opening and closing plate 301 is arranged on one side of the detection chamber 3, a transparent glass plate 304 for facilitating the operator to directly observe the internal situation is installed in the middle of the opening and closing plate 301, and micro cameras 306 (the model of the micro camera 306 is CS-IPC115) are installed near the corners above the inner side of the detection chamber 3.

[0022] Please refer to Figure 2, in this embodiment, on both sides of one side of the cabinet body 1, first connecting rotating shafts 101 are installed. On the side of the cabinet body 1 where the first connecting rotating shafts 101 are installed, rotating doors 102 are symmetrically arranged horizontally. The rotating doors 102 are rotatably connected to the cabinet body 1 through the first connecting rotating shafts 101. On the side of the rotating door 102 away from the first connecting rotating shaft 101, a first handle 103 is installed. On one side of the opening and closing plate 301, a rotating shaft 305 is installed. The opening and closing plate 301 is rotatably connected to the detection chamber 3 through the rotating shaft 305. On the side of the opening and closing plate 301 away from the rotating shaft 305, a second handle 302 is installed. On the edge of the side of the opening and closing plate 301 close to the detection chamber 3, a U-shaped sealing ring 303 for enhancing the sealing performance is installed. On one side of the inner wall of the detection chamber 3, a rectangular notch 307 for installing the clamping assembly 4 is provided.

[0023] Please refer to Figure 3 , in this embodiment, the clamping assembly 4 includes a first cylinder 401, a rectangular telescopic sleeve 402, a first telescopic column 403, a rotating column 404, a motor 405, a connecting column 406, a second connecting rotating shaft 407, an arc-shaped clamping plate 408, an arc-shaped rubber pad 409, and a test tube 410. The rectangular telescopic sleeve 402 is fixedly connected to the detection chamber 3 through the rectangular notch 307. At one end of the rectangular telescopic sleeve 402, a first cylinder 401 is installed. Inside the rectangular telescopic sleeve 402, a first telescopic column 403 is sleeved. At the end of the first telescopic column 403 away from the rectangular telescopic sleeve 402, a rotating column 404 is installed. At the upper end of the rotating column 404, a motor 405 is installed. The connecting column 406 is rotatably connected to the first telescopic column 403 through the rotating column 404. On the side of the connecting column 406 away from the rotating column 404, second connecting rotating shafts 407 are symmetrically installed horizontally. At the upper end of the second connecting rotating shaft 407, a driver (the model of the driver is AQMD6030BLS-E3) is installed. The arc-shaped clamping plate 408 is rotatably connected to the connecting column 406 through the second connecting rotating shaft 407. Inside the arc-shaped clamping plate 408, an arc-shaped rubber pad 409 for increasing the friction force is installed. A test tube 410 is arranged between the two arc-shaped clamping plates 408.

[0024] Please refer to Figure 4 , in this embodiment, the dropping point assembly 5 includes a second telescopic column 501, an L-shaped telescopic sleeve 502, a second cylinder 503, a burette 504, a telescopic valve 505, and an electromagnetic control valve 506 (the model of the electromagnetic control valve 506 is AD-8A-N-G1). At the upper end of the L-shaped telescopic sleeve 502, a second cylinder 503 is installed. Inside the L-shaped telescopic sleeve 502, a second telescopic column 501 with the lower end fixedly connected to the cabinet body 1 is sleeved. At the end of the L-shaped telescopic sleeve 502 away from the second telescopic column 501, a burette 504 is installed. Outside the lower end of the burette 504, a telescopic valve 505 is sleeved. On the outside of one side of the telescopic valve 505, an electromagnetic control valve 506 is installed.

[0025] When working, by pulling the first handle 103, the door 102 rotates and opens through the first connecting rotating shaft 101 with the cabinet body 1, which is convenient for placing the items needed for detection in the cabinet body 1 and for taking them at any time. Then, by pulling the second handle 302, the opening and closing plate 301 rotates and opens through the rotating shaft 305 with the detection chamber 3. Immediately afterwards, a quantitative sample and an appropriate amount of phenolphthalein indicator are sequentially placed into the test tube 410. Then, the test tube 410 is placed between two groups of arc-shaped clamping plates 408. Driven by the driver, the arc-shaped clamping plates 408 are rotationally connected to the connecting column 406 through the second connecting rotating shaft 407, driving the arc-shaped rubber pad 409 to continuously approach and fit the test tube 410 to fix and clamp it. The arc-shaped rubber pad 409 can increase the friction force and prevent the test tube 410 from slipping during the detection and shaking process. When the test tube 410 is placed, a sodium hydroxide solution with a known concentration is poured into the burette 504. Finally, by pushing the second handle 302, the U-shaped sealing ring 303 drives the opening and closing plate 301 to fit and connect along the inner wall of the detection chamber 3. The U-shaped sealing ring 303 can increase the sealing performance and prevent the detection process from being interfered by the external environment;

[0026] After the detection chamber 3 is closed, according to the position of the burette 504, driven by the first air cylinder 401, the first telescopic column 403 drives the test tube 410 to move horizontally along the rectangular telescopic sleeve 402 to a suitable position. Then, driven by the motor 405, the connecting column 406 rotates to a suitable angle through the rotating column 404 with the first telescopic column 403, so that the test tube 410 is located directly below the burette 504. After the position of the test tube 410 is adjusted, driven by the second air cylinder 503, the L-shaped telescopic sleeve 502 drives the burette 504 to move downward along the second telescopic column 501 until the burette 504 reaches into the test tube 410 to prevent the sodium hydroxide solution from splashing out. Then, through the control of the display panel 2 and the control of the electromagnetic control valve 506, the telescopic valve 505 slowly contracts, so that a drop of sodium hydroxide solution in the burette 504 drips into the test tube 410. Then, the telescopic valve 505 quickly closes to prevent excess sodium hydroxide solution from dripping out and affecting the detection result. Finally, driven by the second air cylinder 503, the L-shaped telescopic sleeve 502 drives the burette 504 to move upward;

[0027] When a drop of sodium hydroxide solution with a known concentration is dropped into the test tube 410, driven by the motor 405, the connecting column 406 is rotationally connected to the first telescopic column 403 through the rotating column 404, thereby driving the test tube 410 to shake gently to fully mix the reagents. Then, repeat the above operation to make the test tube 410 located directly below the burette 504 again. Then, the burette 504 moves downward, and another drop of sodium hydroxide solution is dropped into the test tube 410. Repeat this process multiple times until the color of the solution in the test tube 410 changes from colorless to pink and remains for a certain period of time, about 30 seconds without fading. This marks the titration end point. By recording the volume of the titrant consumed during the titration process, according to the concentration and volume of the titrant, the acid value of the sample can be calculated;

[0028] During the detection process, the operator can directly observe the internal situation of the detection chamber 3 through the transparent glass plate 304, or through the function of multiple micro cameras 306, monitor the inside of the detection chamber 3 from multiple angles, and then transmit the image to the display panel 2 for recording and viewing, which is convenient for the operator to observe the process of acid value titration point detection. Thus, the operator can timely discover abnormal situations and make adjustments in a timely manner. At the same time, the process is recorded, which is convenient for viewing multiple times, continuously improving the detection technology, and improving the accuracy of the experimental results.

[0029] Through the above steps, through the transparent glass plate 304, the operator can directly observe the whole process of acid value titration point detection, which is convenient for quickly understanding the detection status. And through the micro camera 306, it is convenient for recording and viewing multiple times, continuously improving the detection technology, and can monitor the data changes during the detection process in real time, such as the volume of the titrant, the titration speed, etc., which is convenient for users to timely discover problems and make adjustments.

[0030] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A visual acid value dropping point detection device, comprising a cabinet (1); characterized in that: The cabinet (1) further comprises a display panel (2), a detection chamber (3), a clamping assembly (4) and a dropping point assembly (5); a display panel (2) for real-time monitoring of the internal conditions of the detection chamber (3) is installed on one side of the upper end of the cabinet (1); a detection chamber (3) for providing a closed environment for acid value dropping point detection and having a lower end fixedly connected to the cabinet (1) is provided on one side of the display panel (2); a clamping assembly (4) for clamping a container for placing a quantitative sample and an appropriate amount of phenolphthalein indicator and driving the container to shake slightly is installed on one side of the interior of the detection chamber (3); a dropping point assembly (5) for dropwise adding a sodium hydroxide solution of a known concentration into the container is installed on one side of the interior of the detection chamber (3); an opening and closing plate (301) is provided on one side of the detection chamber (3); a transparent glass plate (304) for facilitating an operator to directly observe the internal conditions is installed in the middle of the opening and closing plate (301); and miniature cameras (306) are installed on the upper inner side of the detection chamber (3) near the corners.

2. A visual acid value dropping point detection device according to claim 1, characterized in that: A first connecting shaft (101) is installed on both sides of one side of the cabinet (1); a rotating door (102) is symmetrically arranged on the side of the cabinet (1) on which the first connecting shaft (101) is installed; the rotating door (102) is rotatably connected to the cabinet (1) via the first connecting shaft (101); and a first handle (103) is installed on the side of the rotating door (102) away from the first connecting shaft (101).

3. A visual acid value dropping point detection device according to claim 1, characterized in that: A rotating shaft (305) is installed on one side of the opening and closing plate (301), and the opening and closing plate (301) is rotatably connected to the detection chamber (3) via the rotating shaft (305). A second handle (302) is installed on the side of the opening and closing plate (301) away from the rotating shaft (305). A U-shaped sealing ring (303) for improving sealing performance is installed on the edge of one side of the opening and closing plate (301) close to the detection chamber (3). A rectangular notch (307) for installing a clamping assembly (4) is opened on one side of the inner wall of the detection chamber (3).

4. A visual acid value dropping point detection device according to claim 1, characterized in that: The clamping assembly (4) comprises a first cylinder (401), a rectangular telescopic sleeve (402), a first telescopic column (403), a rotating column (404), a motor (405), a connecting column (406), a second connecting rotating shaft (407), an arc-shaped clamping plate (408), an arc-shaped rubber pad (409) and a test tube (410); the rectangular telescopic sleeve (402) is fixedly connected to the detection chamber (3) through a rectangular notch (307); one end of the rectangular telescopic sleeve (402) is provided with the first cylinder (401); the interior of the rectangular telescopic sleeve (402) is provided with the first telescopic column (403); the end of the first telescopic column (403) away from the rectangular telescopic sleeve (402) is provided with a rotating column (404); and the upper end of the rotating column (404) is provided with a motor (405).

5. A visual acid value dropping point detection device according to claim 4, characterized in that: The connecting column (406) is rotatably connected to the first telescopic column (403) via the rotating column (404); a second connecting shaft (407) is symmetrically installed on the side of the connecting column (406) away from the rotating column (404); a driver is installed on the upper end of the second connecting shaft (407); an arc-shaped clamping plate (408) is rotatably connected to the connecting column (406) via the second connecting shaft (407); an arc-shaped rubber pad (409) for increasing friction is installed on the inner side of the arc-shaped clamping plate (408); and a test tube (410) is provided between the two sets of arc-shaped clamping plates (408).

6. A visual acid value dropping point detection device according to claim 1, characterized in that: The dropping point assembly (5) comprises a second telescopic column (501), an L-shaped telescopic sleeve (502), a second cylinder (503), a burette (504), a telescopic valve (505), and an electromagnetic control valve (506); the second cylinder (503) is installed at the upper end of the L-shaped telescopic sleeve (502); and the interior of the L-shaped telescopic sleeve (502) is provided with a second telescopic column (501) whose lower end is fixedly connected to the cabinet (1).

7. A visual acid value dropping point detection device according to claim 6, characterized in that: A burette (504) is installed at one end of the L-shaped telescopic sleeve (502) away from the second telescopic column (501), a telescopic valve (505) is sleeved on the lower end of the burette (504), and an electromagnetic control valve (506) is installed on one side of the outside of the telescopic valve (505).

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