Nitrogen blowing device for full-automatic sample pretreatment

Abstract

The utility model relates to a nitrogen blowing device for full-automatic sample pretreatment, which comprises a heating mechanism and a nitrogen blowing mechanism, a sample tray is arranged on the heating mechanism, a test tube groove is arranged on the sample tray, a test tube is placed in the test tube groove, the nitrogen blowing mechanism is arranged on one side of the heating mechanism, and the nitrogen blowing mechanism is arranged on the other side of the heating mechanism. The nitrogen blowing mechanism comprises a fixing frame, a motor, a lead screw, a nut sleeve, a sliding block, a sliding rail, a connecting plate, a blowing box and a blowing needle, the blowing needle penetrates through the bottom of the blowing box, the bottom end of the blowing needle is aligned to the test tube groove, the other end of the blowing needle is connected with a blowing pipe, the blowing pipe is externally connected with a steam pocket, and when the heating mechanism heats the test tubes, the heating mechanism is connected with the nitrogen blowing mechanism through the steam pocket. The motor is started and drives the lead screw to rotate, and when the lead screw rotates, the nut sleeve slides downwards on the lead screw, so that the blowing box descends until the blowing needle on the blowing box extends into the test tube, the steam pocket blows liquid in the test tube through the air pipe and the blowing needle, and the evaporation efficiency during heating is improved.

Description

Technical Field

[0001] The utility model relates to the field of sample pretreatment, in particular to a nitrogen blowing device for full-automatic sample pretreatment. Background Art

[0002] In the field of sample detection, such as pesticide residue detection, etc., operations such as oscillation, stirring, heating, etc. need to be performed on the sample after mixing the reagents. The purpose of heating is to quickly evaporate the water in the sample solution and only retain the sample to be detected.

[0003] However, the effect of evaporation only by heating is not ideal, and the evaporation efficiency is low. Therefore, the inventor proposes a nitrogen blowing device for full-automatic sample pretreatment to improve the sample evaporation efficiency. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a nitrogen blowing device for full-automatic sample pretreatment.

[0005] The nitrogen blowing device for full-automatic sample pretreatment provided by the utility model adopts the following technical solutions:

[0006] A nitrogen blowing device for full-automatic sample pretreatment includes a heating mechanism and a nitrogen blowing mechanism. A sample tray is arranged on the heating mechanism. A test tube slot is arranged on the sample tray, and a test tube is placed in the test tube slot. The nitrogen blowing mechanism is arranged on one side of the heating mechanism. The nitrogen blowing mechanism includes a fixed frame, a motor, a lead screw, a nut sleeve, a slider, a slide rail, a connecting plate, a blowing box, and a blowing needle. The blowing needle penetrates through the bottom of the blowing box, and the bottom end of the blowing needle is aligned with the test tube slot. The other end of the blowing needle is connected to a blowing tube, and the blowing tube is externally connected to a steam drum.

[0007] Preferably, six groups of blowing needles are provided. The six groups of blowing needles are all arranged on the blowing box and are respectively connected to the blowing tube.

[0008] Preferably, an air suction mechanism is further included. The air suction mechanism includes an air suction needle, an air suction tube, and an air pump. The air suction needle penetrates through the bottom of the blowing box. The air suction needle is connected to the air suction tube, and the air suction tube is externally connected to the air pump. The air suction needle and the blowing needle are arranged at intervals. The bottom of the air suction needle is shorter than the bottom of the blowing needle, and when the bottom of the blowing needle extends into the test tube, the bottom of the air suction needle is higher than the test tube.

[0009] Preferably, six groups of air suction needles are also provided. The six groups of air suction needles are respectively connected to the air suction tube.

[0010] Preferably, both the motor and the slide rail are arranged on the fixed frame. The output end of the motor is connected to the lead screw. A nut sleeve is arranged on the lead screw. One side of the nut sleeve is connected to the slider, and the slider is in sliding fit with the slide rail. The other side of the nut sleeve is connected to the connecting plate, and the air blowing box is arranged on the connecting plate.

[0011] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0012] 1. When the heating mechanism heats the test tube, the motor is started. The motor drives the lead screw to rotate. When the lead screw rotates, the nut sleeve slides downward on the lead screw, so that the air blowing box descends until the air blowing needle on the air blowing box extends into the test tube. The steam drum blows air into the liquid in the test tube through the air pipe and the air blowing needle, dispersing the heated liquid, increasing the exposed area of the liquid surface, and accelerating the air flow on the liquid surface, thereby improving the evaporation efficiency during heating.

[0013] 2. When the bottom of the air blowing needle extends into the test tube, the bottom of the air suction needle is higher than the test tube. The air pump absorbs the steam in the test tube through the air suction pipe and the air suction needle, ensuring that the steam generated in the test tube can be sucked away in time, thereby further improving the evaporation efficiency during heating. Description of the Drawings

[0014] Figure 1 is an overall structural schematic diagram of a nitrogen blowing device for fully automatic sample pretreatment.

[0015] Figure 2 is a schematic diagram for embodying the nitrogen blowing mechanism and the air suction mechanism.

[0016] Description of the reference numerals: 1. Heating mechanism; 11. Sample tray; 12. Test tube slot; 2. Nitrogen blowing mechanism; 21. Fixed frame; 22. Motor; 23. Lead screw; 24. Nut sleeve; 25. Slider; 26. Slide rail; 27. Connecting plate; 28. Air blowing box; 29. Air blowing needle; 3. Air suction mechanism; 31. Air suction needle; 4. Air blowing pipe; 5. Air suction pipe. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model.

[0019] In addition, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0020] An embodiment of the present utility model discloses a nitrogen blowing device for full-automatic sample pretreatment. Referring to Figure 1-2 , a nitrogen blowing device for full-automatic sample pretreatment includes a heating mechanism 1 and a nitrogen blowing mechanism 2. A sample tray 11 is arranged on the heating mechanism 1, a test tube slot 12 is arranged on the sample tray 11, a test tube is placed in the test tube slot 12, the nitrogen blowing mechanism 2 is arranged on one side of the heating mechanism 1, the nitrogen blowing mechanism 2 includes a fixing frame 21, a motor 22, a lead screw 23, a nut sleeve 24, a slider 25, a slide rail 26, a connecting plate 27, a blowing box 28, and a blowing needle 29. The blowing needle 29 penetrates through the bottom of the blowing box 28, the bottom end of the blowing needle 29 is aligned with the test tube slot 12, the other end of the blowing needle 29 is connected with a blowing tube 4, the blowing tube 4 is externally connected with a steam drum, six groups of blowing needles 29 are arranged, all six groups of blowing needles 29 are arranged on the blowing box 28 and are respectively connected with the blowing tube 4, the motor 22 and the slide rail 26 are both arranged on the fixing frame 21, the output end of the motor 22 is connected with the lead screw 23, the nut sleeve 24 is arranged on the lead screw 23, one side of the nut sleeve 24 is connected with the slider 25, the slider 25 is slidably matched with the slide rail 26, the other side of the nut sleeve 24 is connected with the connecting plate 27, and the blowing box 28 is arranged on the connecting plate 27. Through this design, when the heating mechanism 1 heats the test tube, the motor 22 is started, the motor 22 drives the lead screw 23 to rotate. When the lead screw 23 rotates, the nut sleeve 24 slides downward on the lead screw 23, so that the blowing box 28 descends until the blowing needle 29 on the blowing box 28 extends into the test tube, and the steam drum blows air into the liquid in the test tube through the air pipe and the blowing needle 29, improving the evaporation efficiency during heating.

[0021] An air suction mechanism 3 is further provided on the air blowing box 28. The air suction mechanism 3 includes an air suction needle 31, an air suction pipe 5 and an air pump. The air suction needle 31 passes through the bottom of the air blowing box 28. The air suction needle 31 is connected to the air suction pipe 5. The air suction pipe 5 is externally connected with an air pump. The air suction needle 31 and the air blowing needle 29 are arranged at intervals. The bottom of the air suction needle 31 is shorter than the bottom of the air blowing needle 29. And when the bottom of the air blowing needle 29 extends into the test tube, the bottom of the air suction needle 31 is higher than the test tube. The air pump absorbs steam from the test tube through the air suction pipe 5 and the air suction needle 31, ensuring that the steam generated in the test tube can be timely sucked away, thereby further improving the evaporation efficiency during heating.

[0022] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A nitrogen blowing device for fully automatic sample pretreatment, characterized in that: The invention comprises a heating mechanism (1) and a nitrogen blowing mechanism (2). The heating mechanism (1) is provided with a sample tray (11). The sample tray (11) is provided with a test tube slot (12). Test tubes are placed in the test tube slot (12). The nitrogen blowing mechanism (2) is arranged on one side of the heating mechanism (1). The nitrogen blowing mechanism (2) comprises a fixing frame (21), a motor (22), a screw rod (23), a nut sleeve (24), a slider (25), a slide rail (26), a connecting plate (27), a blowing box (28), and a blowing needle (29). The blowing needle (29) passes through the bottom of the blowing box (28). The bottom end of the blowing needle (29) is aligned with the test tube slot (12). The other end of the blowing needle (29) is connected to a blowing pipe (4). The blowing pipe (4) is externally connected to a steam drum.

2. A nitrogen blowing device for fully automatic sample pretreatment according to claim 1, characterized in that: The blowing needles (29) are provided in six groups, and the six groups of blowing needles (29) are all provided on the blowing box (28) and are respectively connected to the blowing pipes (4).

3. The nitrogen blowing device for fully automatic sample pretreatment according to claim 1, characterized in that: The invention also comprises an air suction mechanism (3), wherein the air suction mechanism (3) comprises an air suction needle (31), an air suction pipe (5) and an air pump, wherein the air suction needle (31) passes through the bottom of the air blowing box (28), the air suction needle (31) is connected to the air suction pipe (5), the air suction pipe (5) is externally connected to an air pump, the air suction needle (31) and the air blowing needle (29) are arranged at a distance, the bottom of the air suction needle (31) is shorter than the bottom of the air blowing needle (29), and when the bottom of the air blowing needle (29) extends into the test tube, the bottom of the air suction needle (31) is higher than the test tube.

4. A nitrogen blowing device for fully automatic sample pretreatment according to claim 3, characterized in that: The suction needles (31) are also provided in six groups, and the six groups of the suction needles (31) are respectively connected to the suction pipes (5).

5. The nitrogen blowing device for fully automatic sample pretreatment according to claim 1, characterized in that: The motor (22) and the slide rail (26) are both arranged on the fixed frame (21); the output end of the motor (22) is connected to the screw rod (23); the nut sleeve (24) is arranged on the screw rod (23); one side of the nut sleeve (24) is connected to the slider (25); the slider (25) and the slide rail (26) are slidably matched; the other side of the nut sleeve (24) is connected to the connecting plate (27); and the blow box (28) is arranged on the connecting plate (27).

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