Ultrasound and optics combined hemicellulose alkali liquor detection sample clamping device

Abstract

The utility model discloses an ultrasound and optics combined hemicellulose alkali liquor detection sample clamping device, which relates to the technical field of mixed liquor concentration measurement and comprises a base, a bolt is inserted into one end of the base, an ultrasonic transmitting transducer is embedded in the top of one end of the base, a transducer fixing frame is attached to one side of the ultrasonic transmitting transducer, and the other side of the transducer fixing frame is provided with a clamping groove. One end of the ultrasonic transmitting transducer is attached to the surface of the ultrasonic transmitting transducer, a transducer pressing plate is arranged at the top of the other end of the base, and an ultrasonic receiving transducer is arranged on the side, close to the ultrasonic transmitting transducer, of the transducer pressing plate. According to the ultrasonic and optical combined hemicellulose alkali liquor detection sample clamping device, a special standard rectangular glass cuvette for analysis is used as a sample container, the position of a light path and ultrasonic sensor clamping structure can be locked, adjustment is flexible, a coupling agent is convenient to smear, and a sample is convenient to assemble and disassemble; the rapid and stable detection of the hemicellulose concentration and the sodium hydroxide concentration can be conveniently realized.

Description

Technical Field

[0001] This utility model relates to the technical field of mixed solution concentration measurement, specifically a clamping device for detecting samples of hemicellulose alkaline solution by combining ultrasound and optics. Background Technique

[0002] In the production of viscose fiber, a large amount of high-concentration alkaline press liquor rich in hemicellulose is generated, and its main components are sodium hydroxide and hemicellulose. In order to achieve resource utilization and reduce environmental pollution, it is of great social and economic benefits to recycle alkali and hemicellulose using nanofiltration membranes.

[0003] In the process of recycling alkali and hemicellulose using a nanofiltration membrane system, in order to regulate the system working parameters, judge the filtration performance of the nanofiltration membrane, improve the service life of the nanofiltration membrane, and reduce production costs, it is crucial to monitor the liquid component concentration of the liquid entering and leaving the nanofiltration membrane.

[0004] At present, the detection of the concentration of alkaline lye hemicellulose mainly uses chemical methods, and most of them are potassium dichromate-redox methods. The principle is to completely oxidize hemicellulose with excessive potassium dichromate, and then titrate the excessive potassium dichromate with ammonium ferrous sulfate. The content of hemicellulose is obtained according to the consumption of potassium dichromate. For example, as described in Chinese Patent CN110044845A: The content of reducing sugar solids formed by dissolving hemicellulose under alkaline conditions is detected by a refractometry method, a standard curve of the content of reducing sugar solids and the content of hemicellulose is established, and the content of hemicellulose in xylooligosaccharide raw materials is calculated by using a linear regression equation. However, this method has a long detection time, consumes heavy metal chemical reagents during the detection process, causes relatively large environmental pollution, and the temperature has a great influence on the detection result, resulting in a large error in the result. And using modern instrumental analysis methods, such as described in Chinese Patent CN108982409A: Based on near-infrared spectroscopy, the content of hemicellulose in large brown algae is rapidly detected. The corresponding near-infrared spectrum is obtained by the instrument, and a near-infrared rapid detection model for the content of hemicellulose is established by using a regression method to achieve accurate determination of the content of hemicellulose. However, most of these instruments are expensive, have high requirements for the professional technology of operators; are not suitable for industrial sites with complex and harsh environments, and have high maintenance costs. As described in Chinese Patent CN220356990U: Based on ultrasonic liquid concentration measurement, by setting a temperature sensor and a transmitting transducer and a receiving transducer, the propagation speeds of ultrasonic waves passing through transparent and non-transparent liquids at different temperatures can be detected. During the detection, the positions of the ultrasonic receiving and transmitting transducers are in an adjustable state, and it is difficult to ensure the coaxiality of the two transducers. As described in Chinese Patent CN211121365U: Based on ultrasonic elements, the liquid level and concentration of urea solution are measured. Placing this mechanism in urea easily causes solid substances to precipitate at the gap between the slide rail and the slider, affecting the normal operation of the slider, resulting in a change in the ultrasonic propagation distance, and further affecting the measurement data. Therefore, there is an urgent need to design a method and device for detecting the concentration of hemicellulose in viscose fiber impregnated alkaline lye that is fast and low-cost.

[0005] The recycled alkaline lye mainly contains hemicellulose and sodium hydroxide. According to the characteristics of this mixed liquid, ultrasonic waves combined with optical characteristics can be used to measure the concentration of hemicellulose. To ensure the stability of data measurement, it is crucial to maintain the relative stability of the positions of the light source and the ultrasonic sensor. For this purpose, a special device for clamping samples needs to be designed. This device needs to consider issues such as flexible operation, convenient application of the ultrasonic sensor couplant, the ability to maintain a uniform and stable clamping force during the detection process by the ultrasonic sensor, and the stable position of the sensor. At present, there is no automatic liquid concentration measurement method and device that combines ultrasonic and optical, nor are there relevant clamping devices for reference. Utility Model Content

[0006] In view of the deficiencies of the prior art, the present utility provides a clamping device for semi - cellulose alkaline solution detection samples combining ultrasound and optics, which solves the problems raised in the above - mentioned background art.

[0007] To achieve the above objectives, the present utility is realized through the following technical solutions: A clamping device for semi - cellulose alkaline solution detection samples combining ultrasound and optics, including a base. One end of the base is inserted with a pin. At the top of one end of the base, an ultrasonic transmitting transducer is embedded. A transducer fixing frame is attached to one side of the ultrasonic transmitting transducer, and the surface of the ultrasonic transmitting transducer is attached to one end of the ultrasonic transmitting transducer. At the top of the other end of the base, a transducer pressing plate is provided. An ultrasonic receiving transducer is provided on the side of the transducer pressing plate close to the ultrasonic transmitting transducer. Springs are provided on both sides of the ultrasonic receiving transducer, and bolts are provided on one side of the springs. In the middle of the base, there is a cuvette groove located between the ultrasonic receiving transducer and the ultrasonic transmitting transducer. A cuvette is provided inside the cuvette groove, and vertical surfaces of the base are provided on both sides of the cuvette groove.

[0008] A light source is provided on the top of one side of the base, and a spectral sensor is provided on the top of the other side of the base.

[0009] Optionally, the ultrasonic transmitting transducer is inserted into the transducer fixing frame and connected to the base through the pin.

[0010] Optionally, one end of the spring is fixed to the base through the bolt, and the other end of the spring is hooked on the transducer pressing plate.

[0011] Optionally, the ultrasonic transmitting transducer and the ultrasonic receiving transducer are coaxial.

[0012] Optionally, the ultrasonic receiving transducer, the transducer pressing plate, the spring and the bolt form an ultrasonic pressing mechanism.

[0013] Optionally, the springs are symmetrically distributed about the central axis of the ultrasonic receiving transducer.

[0014] Optionally, the ultrasonic transmitting transducer and the ultrasonic receiving transducer are symmetrically distributed about the center line of the cuvette.

[0015] Optionally, the central axis of the light source is perpendicular to the center line of the cuvette.

[0016] Optionally, the external structure size of the bottom end of the cuvette matches the internal structure size of the cuvette groove.

[0017] The present utility provides a clamping device for semi - cellulose alkaline solution detection samples combining ultrasound and optics, which has the following beneficial effects:

[0018] The clamping device for detecting hemicellulose alkaline solution by combining ultrasound and optics provides a convenient, fast, and low-cost method and device for quickly measuring the concentration of recycled alkaline solution in the viscose fiber production process; the sample loading and unloading are convenient, and the relative position of the sample can be kept stable during repeated measurements, ensuring the repeatability of the measurement; the measurement of the concentration of the mixed solution has a wide range of industrial requirements, and this method and device provide a new method and device reference for other applications in the chemical industry;

[0019] This clamping device utilizes the stretchability of the spring. Through the spring tensile force, it ensures that the clamped sample remains stable during the experiment; the spring provides a continuous clamping force in the static state; the device firmly fixes the pressure spring through bolts to ensure the stability and accuracy of the clamping;

[0020] In order to reduce the detection influence caused by the position of each sample placement, a concave structure is designed on the device base to control the error caused by the position variable; the ultrasonic transmitting transducer is placed in the transducer fixing frame, and the holder is connected to the base by a pin, which not only fixes the relative position of the ultrasonic transmitting transducer and the base, but also the pin acts as a rotating shaft to facilitate the flipping of the holder to apply the coupling agent; the ultrasonic receiving transducer is placed in the groove designed on the base, and the movement of the transducer is assisted by the transducer pressing plate; the bolt fixes one end of the spring to the base, and the other end of the spring is connected to the transducer pressing plate; since the base is designed with a transducer adapter groove, the movement mode of the transducer is restricted, reducing the detection error caused by the instrument; when the distance between the two transducers at both ends of the transducer pressing plate spring in the static state is smaller than the size of the sample to be detected, this ensures that the spring is in a stretched state during the detection process; under the action of the tensile force, the stability of the sample clamping during the detection process is ensured, further improving the reliability of the detection data; the light source and the spectral sensor are respectively in the vertical position of the ultrasonic clamping device, and the displacement of the light source and the spectral sensor is restricted by the bosses designed on the base to prevent the change of the detection data value caused by the position change. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the lifted position of the transducer in this utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the detection sample clamping device in this utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the ultrasonic transmitting transducer in this utility model.

[0024] In the figure: 1. Ultrasonic transmitting transducer; 2. Base; 3. Pin; 4. Transducer fixing frame; 5. Light source; 6. Bolt; 7. Ultrasonic receiving transducer; 8. Transducer pressing plate; 9. Spring; 10. Spectral sensor; 11. Colorimetric cuvette; 12. Vertical plane of the base; 13. Colorimetric cuvette groove; 14. Surface of the ultrasonic transmitting transducer. Detailed implementation mode

[0025] Next, in combination with the drawings in this practical embodiment, the technical solutions in this practical embodiment will be clearly and completely described. Obviously, the described embodiments are only a part of this practical embodiment, rather than all of the embodiments.

[0026] In the description of this practical application, unless otherwise stated, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this practical application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this practical application. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of this practical application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this practical application can be understood according to specific situations.

[0028] Please refer to Figures 1 to 3 , a semi - cellulose alkaline solution detection sample clamping device combining ultrasound and optics, including a base 2. One end of the base 2 is inserted with a plug pin 3. One end of the top of the base 2 is embedded with an ultrasonic transmitting transducer 1. One side of the ultrasonic transmitting transducer 1 is attached to a transducer fixing frame 4. One end of the ultrasonic transmitting transducer 1 is attached to the surface of the ultrasonic transmitting transducer 14. On the top of the other end of the base 2, there is a transducer pressing plate 8. On the side of the transducer pressing plate 8 close to the ultrasonic transmitting transducer 1, there is an ultrasonic receiving transducer 7. Springs 9 are arranged on both sides of the ultrasonic receiving transducer 7. One side of the spring 9 is provided with a bolt 6. In the middle of the base 2, there is a cuvette groove 13 located between the ultrasonic receiving transducer 7 and the ultrasonic transmitting transducer 1. A cuvette 11 is arranged inside the cuvette groove 13. Vertical surfaces of the base 12 are arranged on both sides of the cuvette groove 13;

[0029] On the top of one side of the base 2, there is a light source 5. On the top of the other side of the base 2, there is a spectral sensor 10.

[0030] In this embodiment, as Figure 1 and Figure 2 shown, the ultrasonic transmitting transducer 1 is inserted into the transducer fixing frame 4 and connected to the base 2 through the plug pin 3.

[0031] In this embodiment, as Figure 1 and Figure 2 shown, one end of the spring 9 is fixed to the base 2 by bolts 6, and the other end of the spring 9 is hooked on the transducer pressing plate 8.

[0032] In this embodiment, as Figure 1 and Figure 2 shown, the ultrasonic transmitting transducer 1 and the ultrasonic receiving transducer 7 are coaxial.

[0033] In this embodiment, as Figure 1 shown, an ultrasonic pressing mechanism is formed among the ultrasonic receiving transducer 7, the transducer pressing plate 8, the spring 9 and the bolts 6.

[0034] In this embodiment, as Figure 1 and Figure 2 shown, the springs 9 are symmetrically distributed about the central axis of the ultrasonic receiving transducer 7.

[0035] In this embodiment, as Figure 1 and Figure 2 shown, the ultrasonic transmitting transducer 1 and the ultrasonic receiving transducer 7 are symmetrically distributed about the center line of the cuvette 11.

[0036] In this embodiment, as Figure 1 and Figure 2 shown, the central axis of the light source 5 is perpendicular to the center line of the cuvette 11.

[0037] In this embodiment, as Figure 1 and Figure 3 shown, the external structure dimensions of the bottom end of the cuvette 11 match the internal structure dimensions of the cuvette groove 13.

[0038] Working process: First, pour the liquid to be measured into the cuvette 11, and the liquid level is about 5 mm lower than the height of the glass wall; then rotate and lift the transducer fixing frame 4 at the ultrasonic transmitting transducer 1, apply a spherical coupling agent with a diameter of about 5 mm to the center position of the ultrasonic transmitting transducer 1, and then rotate it to the working position; stretch the transducer pressing plate 8 on the right side, and also apply a spherical coupling agent with a diameter of about 5 mm to the center position of the ultrasonic receiving transducer 7; place the cuvette 11 containing the liquid to be measured at the center cuvette groove 13 of the detection device base 2, and slowly release the transducer pressing plate 8 until it closely adheres to the wall surface of the cuvette 11; connect the power supply of the device, control the operation of each mechanism through the upper computer system, collect data, and calculate the corresponding concentration of the liquid to be measured.

[0039] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the practical concept of the present utility model, making equivalent replacements or changes should be covered within the protection scope of the present utility model.

Claims

1. A clamping device for detecting semi - cellulose alkaline solution specimens by combining ultrasound and optics, characterized in that, It includes a base (2), characterized in that: a plug pin (3) is inserted at one end of the base (2), an ultrasonic transmitting transducer (1) is embedded in the top of one end of the base (2), a transducer fixing bracket (4) is attached to one side of the ultrasonic transmitting transducer (1), an ultrasonic transmitting transducer surface (14) is attached to one end of the ultrasonic transmitting transducer (1), a transducer pressing plate (8) is provided at the top of the other end of the base (2), an ultrasonic receiving transducer (7) is provided on the side of the transducer pressing plate (8) close to the ultrasonic transmitting transducer (1), springs (9) are provided on both sides of the ultrasonic receiving transducer (7), a bolt (6) is provided on one side of the spring (9), a cuvette groove (13) located between the ultrasonic receiving transducer (7) and the ultrasonic transmitting transducer (1) is provided in the middle of the base (2), a cuvette (11) is provided inside the cuvette groove (13), and base vertical surfaces (12) are provided on both sides of the cuvette groove (13); A light source (5) is provided at the top of one side of the base (2), and a spectral sensor (10) is provided at the top of the other side of the base (2).

2. The semi - cellulose lye detection specimen clamping device combining ultrasound and optics according to claim 1, characterized in that: The ultrasonic transmitting transducer (1) is inserted into the transducer fixing bracket (4) and connected to the base (2) through the plug pin (3).

3. The clamping device for the hemicellulose alkaline solution detection sample in combination with ultrasound and optics according to claim 1, wherein: One end of the spring (9) is fixed to the base (2) through the bolt (6), and the other end of the spring (9) is hooked on the transducer pressing plate (8).

4. The semi - cellulose lye detection sample clamping device combining ultrasound and optics according to claim 1, characterized in that: The ultrasonic transmitting transducer (1) and the ultrasonic receiving transducer (7) are coaxial.

5. The semi-cellulose lye detection sample clamping device combining ultrasound and optics according to claim 1, characterized in that: The ultrasonic receiving transducer (7), the transducer pressing plate (8), the spring (9) and the bolt (6) constitute an ultrasonic pressing mechanism.

6. The semi-cellulose lye detection sample clamping device combining ultrasound and optics according to claim 1, characterized in that: The springs (9) are symmetrically distributed about the central axis of the ultrasonic receiving transducer (7).

7. The clamping device for the hemicellulose lye detection sample in combination with ultrasound and optics according to claim 1, characterized in that: The ultrasonic transmitting transducer (1) and the ultrasonic receiving transducer (7) are symmetrically distributed about the center line of the cuvette (11).

8. The semi - cellulose lye detection sample clamping device combining ultrasound and optics according to claim 1, characterized in that: The central axis of the light source (5) is perpendicular to the center line of the cuvette (11).

9. The semi-cellulose alkaline lye detection sample clamping device combining ultrasound and optics according to claim 1, characterized in that, The external structure size of the bottom end of the cuvette (11) matches the internal structure size of the cuvette groove (13).

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