Anti-splashing nitrogen blowing instrument

Abstract

The utility model discloses an anti-splashing nitrogen blowing instrument which comprises a base, a heating assembly, a lifting assembly, a nitrogen blowing assembly and an intelligent interaction assembly, the heating assembly is arranged on the base, the lifting assembly is arranged on the side edge of the base, the nitrogen blowing assembly is installed on the top of the lifting assembly, and the intelligent interaction assembly is electrically connected with the heating assembly, the lifting assembly and the nitrogen blowing assembly. The utility model has the beneficial effects that: the technical scheme has anti-splashing performance: dual guarantee of liquid level self-adaptive adjustment and nitrogen flow accurate control is realized; the temperature curve rises gently, and the risk of thermal stress concentration is eliminated; manual intervention is reduced, and the experiment efficiency and repeatability are improved; operation convenience is achieved, and a visual interface supports one-key start and stop and parameter setting.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental apparatus technical field especially relates to a kind of anti-splashing nitrogen blower. BACKGROUND

[0002] Nitrogen blowing dryer is usually nitrogen is blown into the surface of heated sample to concentrate sample, with time-saving, easy to operate, easy to control etc., can quickly get the expected result. It is widely used in the industries such as pesticide residue analysis, commercial inspection, food, environment, pharmaceutical, biological products and for sample preparation in liquid chromatography, gas chromatography and mass spectrometry, the bottom of traditional dry nitrogen blowing instrument sample test tube is located inside the base, the liquid level height is invisible, the distance between gas needle and liquid level cannot be observed during nitrogen blowing, so as to cause liquid splashing, therefore, it is necessary to develop a kind of anti-splashing nitrogen blowing instrument, by searching, the same technical scheme of the utility model is not found. SUMMARY

[0003] The utility model mainly solves the technical problem to provide a kind of anti-splashing nitrogen blowing instrument, solve one or more of the above technical problems.

[0004] To solve the above technical problems, one technical scheme of the utility model is: a kind of anti-splashing nitrogen blowing instrument, its innovation lies in: including base, heating assembly, lifting assembly, nitrogen blowing assembly and intelligent interaction component;

[0005] The heating assembly is arranged on the base, the lifting assembly is arranged on the side of the base, the nitrogen blowing assembly is installed on the top of the lifting assembly, and the intelligent interaction component is electrically connected with the heating assembly, the lifting assembly and the nitrogen blowing assembly.

[0006] In some embodiments, the base is provided with a mounting groove for embedding the heating assembly, the heating assembly includes a heat insulation block, the heat insulation block is assembled in the mounting groove, a plurality of embedding grooves are provided on the heat insulation block, a bottom support is provided in the embedding groove, and a heating wire in a spiral shape is provided on the outer wall of the bottom support.

[0007] In some embodiments, a temperature sensor for measuring the temperature of the bottom support is arranged in the embedding groove, and the temperature sensor is electrically connected with the intelligent interaction component. The intelligent interaction component adjusts the current intensity of the heating wire through PID algorithm according to the real-time feedback data of the temperature sensor, so that the temperature of the bottom support is stabilized within the set range.

[0008] In some embodiments, the lifting assembly includes a lifting rod arranged on the side of the base, a suspension is arranged on the top of the lifting rod, and the nitrogen blowing assembly is installed on the suspension.

[0009] In some embodiments, the nitrogen blowing assembly comprises a gas needle arranged on a suspension and a gas distribution chamber in communication with the gas needle, the gas distribution chamber being in communication with an external nitrogen gas interface, and a flow meter is further arranged between the gas needle and the gas distribution chamber, the flow meter being electrically connected with the intelligent interaction assembly, and the intelligent interaction assembly dynamically controls the nitrogen flow by adjusting the opening degree of the electromagnetic valve of the gas distribution chamber according to the preset flow parameter or the real-time experimental demand, so as to realize closed-loop control.

[0010] In some embodiments, the bottom of the gas needle is provided with a distance sensor for detecting the distance between the bottom of the odor and the liquid level in the sample test tube, and the distance sensor is electrically connected with the intelligent interaction assembly and the lifting assembly; when it is detected that the liquid level distance exceeds the preset range, the intelligent interaction assembly drives the lifting assembly to automatically adjust the height of the gas needle, so as to ensure that the end of the gas needle maintains a constant distance from the liquid level and prevents splashing.

[0011] In some embodiments, the intelligent interaction assembly comprises a master control unit, a human-computer interaction interface, a sensor interface module and an actuator driving module.

[0012] The master control unit is built into the inside of the base;

[0013] The human-computer interaction interface is fixed on the front of the base and comprises a touch screen and a parameter setting button;

[0014] The sensor interface module is connected with the bottom support temperature sensor, the gas needle bottom distance sensor and the gas distribution chamber flow meter respectively;

[0015] The actuator driving module is electrically connected with the heating wire, the lifting assembly motor and the nitrogen electromagnetic valve of the gas distribution chamber respectively, so as to realize closed-loop control.

[0016] The technical scheme has the advantages that: the technical scheme has the anti-splashing performance: the liquid level is adaptively adjusted and the nitrogen flow is accurately controlled, and the double protection is provided; the test tube is prevented from being broken: the temperature curve rises gently, and the risk of thermal stress concentration is eliminated; the high-efficiency automation: the manual intervention is reduced, and the experimental efficiency and repeatability are improved; the operation is convenient: the visual interface supports one-key start and stop and parameter setting. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor, wherein:

[0018] Figure 1 It is a structure schematic diagram of the anti-splashing nitrogen blowing instrument.

[0019] Figure 2 is a front view of the anti-splashing nitrogen blowing instrument.

[0020] Figure 3 is a side view of the anti-splashing nitrogen blowing instrument.

[0021] Figure 4 is Figure 3 A-A direction section view.

[0022] Figure 5 is Figure 4 the local enlarged view.

[0023] Figure 6 is a closed-loop control logic block diagram of the anti-splashing nitrogen blowing instrument. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] As Figures 1 to 6 shown, the embodiments of the present application include:

[0026] 1. Overall structure description

[0027] The embodiments of the present application provide an anti-splashing nitrogen blowing instrument, which comprises the following core components: a base 100 supporting the overall structure and internally integrating a main control unit; a heating assembly embedded in a mounting groove 101 on the base 100, comprising a heat insulation block 201, a bottom support 203, a spiral heating wire 204 and a temperature sensor; a lifting assembly arranged on the side of the base 100, comprising a lifting rod 301, a suspension 302 and a driving motor; a nitrogen blowing assembly installed on the suspension 302, comprising a gas needle 401, a gas distribution chamber 402, a flow meter 403 and a distance sensor; an intelligent interaction assembly comprising a main control unit, a man-machine interaction interface 501, a sensor interface module and an actuator driving module, realizing closed-loop control and visual operation.

[0028] 2. Temperature control method and principle of the heating assembly

[0029] (1) Precise control of temperature rising curve

[0030] Control method:

[0031] The target temperature and the heating rate (e.g., 5°C / min) are preset through the intelligent interaction component, and the main control unit dynamically adjusts the current intensity of the heating wire 204 based on the PID algorithm. The temperature sensor monitors the temperature of the bottom support 203 in real time and feeds back the data to the main control unit; if the actual temperature deviates from the set curve, the PID algorithm adjusts the current output (e.g., reduces the current intensity to slow down the heating) to ensure that the temperature rises smoothly according to the preset curve.

[0032] Anti-breaking principle:

[0033] Slow heating can avoid the rupture of the test tube due to thermal stress concentration; for example, low-power heating (e.g., 30% rated power) is used in the initial stage, and when the temperature approaches the target value, the fine adjustment mode (±1°C fluctuation) is switched to achieve temperature uniformity.

[0034] (2) Temperature control advantages

[0035] Accuracy: The PID algorithm combined with temperature sensor feedback ensures that the temperature error is ≤±0.5°C.

[0036] Safety: Avoids the rupture of the test tube caused by sudden temperature rise, and prevents the slow heating from affecting the experimental efficiency.

[0037] Automation: Users only need to set parameters through the human-machine interface without manual intervention.

[0038] 3. Height control method and principle of the lifting assembly

[0039] (1) Closed-loop adjustment of liquid level distance

[0040] Control method:

[0041] The distance sensor at the bottom of the air needle (401) detects the distance between the liquid level and the end of the air needle 401 (e.g., 5mm) in real time; when the liquid level increases due to evaporation or sample reduction, the sensor transmits the signal to the main control unit; the main control unit drives the lifting assembly motor to make the suspension 302 drive the air needle 401 to move down until the distance returns to the preset value (e.g., 3mm); conversely, if the liquid level rises, the air needle 401 will be automatically lifted.

[0042] Anti-splashing principle:

[0043] Constant distance ensures that the nitrogen flow acts vertically on the liquid level, avoiding the dispersion (splashing) of the airflow due to the air needle 401 being too high or the disturbance of the liquid level due to the air needle 401 being too low.

[0044] (2) Height control advantages

[0045] Dynamic adaptability: fully automatic adjustment, adapting to real-time changes in the liquid level.

[0046] Accuracy: The resolution of the distance sensor is 0.1mm, and the control accuracy is ±0.5mm.

[0047] Stability: Closed-loop control eliminates human operation errors, ensuring experimental consistency.

[0048] 4. Nitrogen flow control of nitrogen blowing assembly

[0049] Control method:

[0050] Flow meter 403 monitors nitrogen flow in real time (e.g., 10 L / min), and the main control unit compares it with the preset flow value (e.g., 8 L / min). By adjusting the opening degree of the electromagnetic valve of the gas distribution chamber 402 (e.g., from 50% to 40%), the flow is dynamically balanced.

[0051] Advantages: Flow closed-loop control error ≤ ± 0.2 L / min; electromagnetic valve response time ≤ 0.1 seconds, ensuring rapid and stable flow.

[0052] 5. Synergistic working principle of intelligent interaction assembly

[0053] Data integration: The sensor interface module collects temperature, liquid level distance, and nitrogen flow data and transmits them to the main control unit.

[0054] Instruction execution: The actuator driving module controls the power of the heating wire 204, the speed of the lifting motor, and the opening degree of the electromagnetic valve according to the instructions of the main control unit.

[0055] Visual interaction: The human-machine interface displays temperature curve, liquid level distance, nitrogen flow, and alarm prompts (e.g., screen flashes red when temperature exceeds limit) in real time.

[0056] 6. Working principle and advantages of overall structure

[0057] (1) Working principle

[0058] Users set parameters such as temperature, liquid level distance, and nitrogen flow through the human-machine interface; the heating assembly warms up according to the preset curve, the lifting assembly dynamically adjusts the height of the gas needle 401, and the nitrogen blowing assembly precisely controls the nitrogen flow; the intelligent interaction assembly monitors and adjusts parameters in real time, forming a closed-loop control to ensure stability during the experiment.

[0059] (2) Core advantages

[0060] Anti-splashing performance: dual protection of liquid level adaptive adjustment and precise nitrogen flow control.

[0061] Prevent test tube rupture: gentle temperature curve rise eliminates the risk of thermal stress concentration.

[0062] High efficiency and automation: reduces manual intervention, improves experimental efficiency and repeatability.

[0063] Convenient operation: visual interface supports one-key start and stop and parameter setting.

[0064] 7. Example operation flow

[0065] Place the sample tube into the embedded groove 202 of the bottom support 203; input the target temperature (such as 60℃), liquid level distance (such as 3mm), and nitrogen flow (such as 8L / min) through the human-machine interface; start the device, the heating assembly warms up according to the set curve, and the nitrogen blowing assembly starts to blow; the intelligent interaction assembly monitors the parameters in real time, and automatically adjusts the height of the air needle 401 and the nitrogen flow until the experiment is completed.

[0066] The above merely describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application, is also included in the patent protection range of the present application.

Claims

1. A splash guard nitrogen purging instrument, characterized by: The application relates to a heating device for sample tubes, which comprises a base (100), a heating assembly, a lifting assembly, a nitrogen blowing assembly and an intelligent interaction assembly. The heating assembly is arranged on the base (100), the lifting assembly is arranged on the side of the base (100), the nitrogen blowing assembly is arranged on the top of the lifting assembly, and the intelligent interaction assembly is electrically connected with the heating assembly, the lifting assembly and the nitrogen blowing assembly.

2. The anti-splashing nitrogen blowing apparatus according to claim 1, characterized in that: The base (100) is provided with a mounting groove (101) for embedding the heating assembly, the heating assembly comprises a heat insulation block (201), the heat insulation block (201) is arranged in the mounting groove (101), a plurality of embedding grooves (202) are arranged on the heat insulation block (201), a bottom support (203) is arranged in each embedding groove (202), and a heating wire (204) in a spiral shape is arranged on the outer wall of the bottom support (203).

3. A spill resistant nitrogen purger according to claim 2, wherein: A temperature sensor for measuring the temperature of the bottom support (203) is arranged in the embedding groove (202), the temperature sensor is electrically connected with the intelligent interaction assembly, the intelligent interaction assembly adjusts the current intensity of the heating wire (204) through a PID algorithm according to the real-time feedback data of the temperature sensor, and the temperature of the bottom support (203) is stabilized in a set range.

4. The anti-splashing nitrogen purging instrument of claim 1, wherein: The lifting assembly comprises a lifting rod (301) arranged on the side of the base (100), and a suspension (302) is arranged on the top of the lifting rod (301); and the nitrogen blowing assembly is arranged on the suspension (302).

5. A spatter-resistant nitrogen purging instrument according to claim 4, characterized by: The nitrogen blowing assembly comprises a gas needle (401) arranged on the suspension (302) and a gas distribution chamber (402) communicated with the gas needle (401), the gas distribution chamber (402) is communicated with an external nitrogen gas interface (404), a flowmeter (403) is further arranged between the gas needle (401) and the gas distribution chamber (402), the flowmeter (403) is electrically connected with the intelligent interaction assembly, the intelligent interaction assembly dynamically controls the nitrogen flow by adjusting the opening degree of an electromagnetic valve of the gas distribution chamber (402) according to preset flow parameters or real-time experimental requirements, and closed-loop control is realized.

6. A spatter-resistant nitrogen purging instrument according to claim 5, characterized by: A distance sensor is arranged at the bottom of the gas needle (401), the distance sensor is used for detecting the distance between the bottom of the odor and the liquid level in the sample tube, and the distance sensor is electrically connected with the intelligent interaction assembly and the lifting assembly; when the detected liquid level distance exceeds a preset range, the intelligent interaction assembly drives the lifting assembly to automatically adjust the height of the gas needle (401), so that the end of the gas needle (401) keeps a constant distance from the liquid level, and splashing is prevented.

7. The anti-splashing nitrogen purging instrument of claim 1, wherein: The intelligent interaction assembly comprises a master control unit, a man-machine interaction interface (501), a sensor interface module and an actuator driving module. The master control unit is arranged in the base (100). The man-machine interaction interface (501) is fixed on the front of the base (100) and comprises a touch screen and parameter setting buttons. The sensor interface module is connected with the bottom support (203) temperature sensor, the bottom distance sensor of the gas needle (401) and the flowmeter (403) of the gas distribution chamber (402) respectively. The actuator driving module is electrically connected with the heating wire (204), the motor of the lifting assembly and the nitrogen electromagnetic valve of the gas distribution chamber (402) respectively, and closed-loop control is realized.

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