Constant volume sensor for vacuum parallel concentrator

Abstract

The utility model discloses a constant volume sensor for a vacuum parallel concentrator, which comprises a control base, a support column fixedly mounted on the surface of the control base, a constant volume bottle slidably mounted in a test tube rack, a sealing cover fixedly mounted on one side of a rotating rack, and an exhaust pipe fixedly mounted on the top of the sealing cover. A weighing sensor is fixedly installed on the bottom face in the constant volume bottle, a transmission motor is fixedly installed on the surface of the weighing disc, a supporting pipe is fixedly connected to a transmission shaft of the transmission motor, a stirring pipe is fixedly connected to the surface of the supporting pipe, and a wall scraping plate is fixedly connected to the tail end of the stirring pipe. The stirring device has the following effects that the stirring rod and the wall scraping plate are driven to rotate in the constant-volume bottle through the transmission motor mounted on the weighing sensor, so that a solvent in the constant-volume bottle is quickly stirred, the solvent adsorbed on the inner wall of the constant-volume bottle is cleaned, the influence of traditional vibration stirring on the weighing sensor is prevented, and the production efficiency is improved. And the concentrated solvent is effectively prevented from being adsorbed on the inner wall of the constant volume bottle.

Description

Technical Field

[0001] The utility model relates to the technical field of sample concentration, in particular to a constant volume sensor for a vacuum parallel concentrator. Background Art

[0002] In modern laboratory research, vacuum parallel concentrators are widely used in chemistry, biochemistry, environmental science and other fields as an efficient and accurate sample processing equipment to quickly evaporate the solvent in the sample to achieve sample concentration and drying. In order to ensure the precise control of the concentration process, especially to reach the preset volume endpoint (i.e., constant volume), such equipment is usually equipped with a constant volume sensor to automatically cut off the vacuum source when the solvent is concentrated to the target value to avoid excessive concentration leading to sample loss or property changes.

[0003] In the prior art, the vacuum parallel concentrator generally adopts the weighing method as the main means for constant volume control. This constant volume sensor monitors the mass change of the solvent in the concentration bottle in real time. When the mass is reduced to the set threshold, it is judged that the concentration has reached the predetermined volume, and then the system is triggered to close the vacuum pipeline and terminate the concentration process. However, in practical applications, this constant volume sensor based on the weighing principle still has many shortcomings. On the one hand, in the process of vacuum parallel concentration, in order to accelerate the evaporation of the solvent and prevent local overheating, vortex oscillation or mechanical vibration is often used to continuously stir the sample. This violent oscillation action inevitably causes the concentration bottle and its internal solvent to produce dynamic load changes, which interferes with the weighing sensor and easily leads to misjudgment of the constant volume signal. On the other hand, the oscillation process may cause part of the solution to splash and adhere to the inner wall of the solvent bottle and other parts. This part of the attached droplets is not effectively monitored during the subsequent evaporation process, resulting in the final measured mass being lighter than the actual solvent mass after evaporation, affecting the accuracy of the experimental results. For the problems in the related art, no effective solution has been proposed yet. Therefore, it is necessary to propose a constant volume sensor for a vacuum parallel concentrator to solve the above-mentioned problems. Utility Model Content

[0004] In view of the problems in the related technology, the utility model proposes a constant volume sensor for a vacuum parallel concentrator to overcome the above technical problems existing in the existing related technology.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] A constant volume sensor for a vacuum parallel concentrator comprises a control base, a support column is fixedly mounted on the surface of the control base, a test tube rack is fixedly connected to the top of the support column, a constant volume bottle is slidably mounted inside the test tube rack, rotating racks are fixedly mounted on both sides of the surface of the test tube rack, a sealing cover is fixedly mounted on one side of the rotating rack, an exhaust pipe is fixedly mounted on the top of the sealing cover, a condensation mechanism is fixedly connected to one end of the exhaust pipe, a weighing sensor is fixedly mounted on the inner bottom surface of the constant volume bottle, a weighing plate is fixedly mounted above the weighing sensor, the edge of the weighing plate is sealed and fitted with the inner wall of the constant volume bottle, a transmission motor is fixedly mounted on the surface of the weighing plate, a support tube is fixedly connected to the transmission shaft of the transmission motor, a stirring tube is fixedly connected to the surface of the support tube, a scraping plate is fixedly connected to the end of the stirring tube, and a heating resistor is fixedly mounted on the surface of the stirring tube.

[0007] Furthermore, in order to realize condensation and collection of the evaporated water vapor, the condensation assembly includes a fixing frame installed on one side of the control base, a condenser is installed on one side of the fixing frame, the bottom of the condenser is fixedly connected to a collecting bottle, and a lifting platform is installed under the collecting bottle. The evaporated water vapor is condensed into water through the condenser and then falls into the collecting bottle for collection.

[0008] Furthermore, in order to achieve vacuum concentration of the solvent in the constant volume flask, an intake pipe is fixedly installed on one side of the top of the condenser, and one end of the intake pipe is fixedly connected to a vacuum pump. The vacuum pump absorbs the gas in the constant volume flask through the intake pipe and the condenser, and draws the inside of the constant volume flask to a vacuum state, thereby reducing the boiling point of the concentrated solvent.

[0009] Furthermore, in order to provide power and control the weighing sensor and various electrical components on its surface, a transmission tube is fixedly installed at the bottom of the constant volume bottle, a transmission plug is fixedly installed on the bottom surface of the weighing sensor, and a power interface is opened on the surface of the control base. After the transmission plug at the bottom of the weighing sensor is inserted into the power interface on the surface of the control base, the weighing sensor can be controlled and powered.

[0010] Furthermore, in order to provide power to the heating resistor, a wire tube is fixedly connected to the bottom of the support tube, a rotating ring is fixedly connected to the end of the wire tube, the rotating ring is slidably installed on the surface of the weighing disk, a conductive ring 1 is fixedly connected to the bottom of the rotating ring, and a conductive ring 2 is fixedly installed inside the weighing disk. Through the sliding installation of the rotating ring, the conductive ring 1 and the conductive ring 2 are in contact with each other, and the transmission motor can drive the support tube to rotate while also providing power to the heating resistor.

[0011] Furthermore, in order to display and control the concentration process of the solvent, a touch screen is fixedly installed on one side surface of the control base, and the concentration data is displayed and controlled through the touch screen.

[0012] Furthermore, in order to monitor the heating temperature in the constant volume flask, a temperature sensor is fixedly installed on one side surface of the support tube, and the heating temperature of the heating resistor is detected by the temperature sensor.

[0013] The beneficial effects of the utility model are:

[0014] 1. The transmission motor installed on the surface of the weighing sensor drives the support tube and the stirring tube to rotate, so as to continuously stir the solvent in the constant volume bottle and accelerate the concentration and evaporation of the solvent. The solvent in the constant volume bottle can be continuously weighed while stirring, avoiding the influence of the force generated by traditional oscillating stirring on the weighing sensor, making the volume determination after solvent concentration more accurate and realizing precise control of the concentration process.

[0015] 2. While the stirring tube is driven to rotate by the support tube, the scraper plate at the end of the stirring tube continuously scrapes and wipes the inner wall of the constant volume flask, effectively preventing the reagent from being adsorbed on the surface of the constant volume flask during concentration, and helping the weighing sensor to accurately weigh the concentrated reagent in the constant volume flask, further improving the accuracy of constant volume weighing and reducing the error of reagent concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the surface structure of a constant volume sensor for a vacuum parallel concentrator according to an embodiment of the utility model;

[0018] Figure 2 It is an internal cross-sectional view of a constant volume bottle in a constant volume sensor for a vacuum parallel concentrator according to an embodiment of the utility model;

[0019] Figure 3 It is an internal cross-sectional view of a weighing plate at the bottom of a constant volume bottle in a constant volume sensor for a vacuum parallel concentrator according to an embodiment of the utility model;

[0020] Figure 4 Figure 3 The enlarged schematic diagram at A in the middle;

[0021] Figure 5 It is a side view of a constant volume sensor for a vacuum parallel concentrator according to an embodiment of the utility model.

[0022] In the figure:

[0023] 1. Control base; 2. Support column; 3. Test tube rack; 4. Constant volume flask; 5. Rotating frame; 6. Sealing cover; 7. Exhaust pipe; 8. Condensation mechanism; 801. Fixed frame; 802. Condensation tube; 803. Collecting bottle; 804. Lifting platform; 9. Weighing sensor; 10. Weighing plate; 11. Transmission motor; 12. Support tube; 13. Stirring tube; 14. Scraper plate; 15. Heating resistor; 16. Suction pipe; 17. Vacuum pump; 18. Transmission tube; 19. Transmission plug; 20. Power interface; 21. Wire tube; 22. Rotating ring; 23. Conductive ring 1; 24. Conductive ring 2; 25. Touch screen; 26. Temperature sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] According to an embodiment of the utility model, a constant volume sensor for a vacuum parallel concentrator is provided.

[0026] Embodiment 1:

[0027] like Figure 1-Figure 5As shown, a constant volume sensor for a vacuum parallel concentrator according to an embodiment of the utility model comprises a control base 1 with a plc controller installed inside, which is used to operate and control various electrical components in the device; a support column 2 is fixedly installed on the surface of the control base 1, and a test tube rack 3 is fixedly connected to the top of the support column 2, and a plurality of constant volume bottles 4 made of transparent glass for containing reagents are slidably installed inside the test tube rack 3, and rotating racks 5 are fixedly installed on both sides of the surface of the test tube rack 3, and a sealing cover 6 is fixedly installed on one side of the rotating rack 5 for covering and sealing the top of the constant volume bottle 4; an exhaust pipe 7 is fixedly installed on the top of the sealing cover 6 for extracting and discharging the gas in the constant volume bottle 4; a condensation mechanism 8 is fixedly connected to one end of the exhaust pipe 7 to realize condensation and collection of the evaporated solution A weighing sensor 9 is fixedly installed on the inner bottom surface of the constant volume bottle 4, which is used to weigh the solvent in the constant volume bottle 4 in real time; a weighing plate 10 is fixedly installed above the weighing sensor 9, and the edge of the weighing plate 10 is sealed and fitted with the inner wall of the constant volume bottle 4, and a transmission motor 11 is fixedly installed on the surface of the weighing plate 10, and a support tube 12 is fixedly connected to the transmission shaft of the transmission motor 11, and a stirring tube 13 is fixedly connected to the surface of the support tube 12. The support tube 12 and the stirring tube 13 are driven to rotate by the transmission motor 11 to stir the reagent in the constant volume bottle 4, and a scraper plate 14 is fixedly connected to the end of the stirring tube 13 to clean the reagent adsorbed on the inner wall of the constant volume bottle 4; a heating resistor 15 is fixedly installed on the surface of the stirring tube 13 to achieve heating while stirring the reagent.

[0028] like Figure 1-Figure 5As shown, the condensation assembly includes a fixing frame 801 installed on one side of the control base 1, a condensation tube 802 is installed on one side of the fixing frame 801, a condensation agent is provided on the inner wall of the condensation tube 802 for liquefying the water vapor generated by the condensation, a collecting bottle 803 is fixedly connected to the bottom of the condensation tube 802 for upgrading the liquefied water vapor, a lifting platform 804 is installed below the collecting bottle 803, an electric telescopic rod is installed inside the lifting platform 804 for adjusting the height of the condensation assembly; the top of the condensation tube 802 An air suction pipe 16 is fixedly installed on one side, and one end of the air suction pipe 16 is fixedly connected to a vacuum pump 17. The vacuum pump 17 is used to draw the content of the constant volume flask 4 to a vacuum state, so as to reduce the boiling point of the reagent that needs to be concentrated; a transmission pipe 18 is fixedly installed on the bottom of the constant volume flask 4, and a transmission plug 19 is fixedly installed on the bottom surface of the weighing sensor 9. A power interface 20 is opened on the surface of the control base 1, and the power interface 20 cooperates with the transmission plug 19. The transmission plug 19 at the bottom of the weighing sensor 9 is inserted into the power interface 20 on the surface of the control base 1. After that, the control base 1 controls and provides power to the weighing sensor 9; the bottom of the support tube 12 is fixedly connected with a wire tube 21, the end of the wire tube 21 is fixedly connected with a rotating ring 22, the rotating ring 22 is slidably installed on the surface of the weighing pan 10, the bottom surface of the rotating ring 22 is fixedly connected with a conductive ring 1 23, and the inside of the weighing pan 10 is fixedly installed with a conductive ring 24, the conductive ring 1 23 is slidably connected with the conductive ring 24, the conductive ring 24 is electrically connected to the transmission plug 19 through a wire, and the support tube 12, the stirring tube 13 and the wire tube 21 are all electrically connected through a wire; through the sliding installation of the rotating ring 22, the conductive ring 1 23 and the conductive ring 2 24 are slidably contacted, and the transmission motor 11 drives the support tube 12 to rotate while continuously providing power to the heating resistor 15; a touch screen 25 is fixedly installed on one side surface of the control base 1, and the concentrated data is displayed and controlled through the touch screen 25; a temperature sensor 26 is fixedly installed on one side surface of the support tube 12 for real-time monitoring of the heating temperature in the constant volume bottle 4.

[0029] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0030] In actual application, the reagents to be concentrated are placed in each constant volume bottle 4 respectively, the sealing cover 6 is rotated to seal the top of the constant volume bottle 4, a minimum value of the reagent mass is set by the control base 1, and the vacuum pump 17 is started to draw the constant volume bottle 4 to a vacuum state, and the reagent mass on the weighing sensor 9 is observed and recorded at this time. The transmission motor 11 and the heating resistor 15 are started by the control base 1, and the transmission motor 11 drives the support tube 12 and the stirring tube 13 to rotate, and the reagent solution in the constant volume bottle 4 is continuously stirred, and the heating resistor 15 heats the reagent solution to accelerate the concentration of the reagent solution. During the shrinkage and evaporation reaction, the stirring rod rotates and stirs, driving the scraper plate 14 to continuously scrape and clean the inner wall of the constant volume flask 4, so that the water adsorbed on the inner wall actually falls off onto the weighing plate 10; after the water in the reagent evaporates and becomes water vapor, it enters the condenser 802 through the exhaust pipe 7, and falls into the collecting bottle 803 after being cooled and liquefied by the condenser 802. When the weighing sensor 9 detects that the mass of the reagent in the constant volume flask 4 reaches the set minimum value, the control base 1 controls the vacuum pump 17, the transmission motor 11 and the heating resistor 15 to be turned off, so that the reagent in the constant volume flask 4 no longer reacts, and the concentration process of the reagent is completed.

[0031] To sum up, with the help of the above-mentioned technical scheme of the utility model, the transmission motor 11 installed on the surface of the weighing sensor 9 drives the support tube 12 and the stirring tube 13 to rotate, so as to realize continuous stirring of the solvent in the constant volume bottle 4, accelerate the concentration and evaporation of the solvent, and can continuously weigh the solvent in the constant volume bottle 4 while stirring, thereby avoiding the influence of the force generated during traditional oscillation stirring on the weighing sensor 9, making the volume determination after the solvent concentration more accurate, and realizing precise control of the concentration process; while the stirring tube 13 is driven to rotate by the support tube 12, the scraper plate 14 at the end of the stirring tube 13 continuously scrapes and wipes the inner wall of the constant volume bottle 4, effectively preventing the reagent from being adsorbed on the surface of the constant volume bottle 4 during concentration, and helping the weighing sensor 9 to accurately weigh the concentrated reagent in the constant volume bottle 4, further improving the accuracy of the constant volume weighing, and reducing the error of reagent concentration.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A constant volume sensor for a vacuum parallel concentrator, characterized in that: The control base (1) comprises a control base (1), a support column (2) is fixedly mounted on the surface of the control base (1), a test tube rack (3) is fixedly connected to the top of the support column (2), a constant volume bottle (4) is slidably mounted inside the test tube rack (3), rotating frames (5) are fixedly mounted on both sides of the surface of the test tube rack (3), a sealing cover (6) is fixedly mounted on one side of the rotating frame (5), an exhaust pipe (7) is fixedly mounted on the top of the sealing cover (6), one end of the exhaust pipe (7) is fixedly connected to a condensing mechanism (8), and a constant volume bottle (4) is fixedly mounted on the bottom surface of the interior A weighing sensor (9), a weighing plate (10) is fixedly mounted above the weighing sensor (9), the edge of the weighing plate (10) is sealed and fitted with the inner wall of the constant volume flask (4), a transmission motor (11) is fixedly mounted on the surface of the weighing plate (10), a support tube (12) is fixedly connected to the transmission shaft of the transmission motor (11), a stirring tube (13) is fixedly connected to the surface of the support tube (12), a scraper plate (14) is fixedly connected to the end of the stirring tube (13), and a heating resistor (15) is fixedly mounted on the surface of the stirring tube (13).

2. A constant volume sensor for a vacuum parallel concentrator according to claim 1, characterized in that: The condensation mechanism (8) comprises a fixing frame (801) installed on one side of the control base (1), a condensation tube (802) is installed on one side of the fixing frame (801), a collecting bottle (803) is fixedly connected to the bottom of the condensation tube (802), and a lifting platform (804) is installed below the collecting bottle (803).

3. A constant volume sensor for a vacuum parallel concentrator according to claim 2, characterized in that: An air suction pipe (16) is fixedly installed on one side of the top of the condenser (802), and one end of the air suction pipe (16) is fixedly connected to a vacuum pump (17).

4. A constant volume sensor for a vacuum parallel concentrator according to claim 1, characterized in that: A transmission tube (18) is fixedly installed on the bottom of the constant volume bottle (4), a transmission plug (19) is fixedly installed on the bottom surface of the weighing sensor (9), and a power supply interface (20) is opened on the surface of the control base (1).

5. The constant volume sensor for a vacuum parallel concentrator according to claim 1, characterized in that: The bottom of the support tube (12) is fixedly connected to a wire tube (21), the end of the wire tube (21) is fixedly connected to a rotating ring (22), the rotating ring (22) is slidably mounted on the surface of the weighing pan (10), the bottom surface of the rotating ring (22) is fixedly connected to a conductive ring 1 (23), and a conductive ring 2 (24) is fixedly mounted inside the weighing pan (10).

6. A constant volume sensor for a vacuum parallel concentrator according to claim 1, characterized in that: A touch screen (25) is fixedly mounted on one side surface of the control base (1).

7. A constant volume sensor for a vacuum parallel concentrator according to claim 1, characterized in that: A temperature sensor (26) is fixedly mounted on one side surface of the support tube (12).

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