A nitrogen blowing instrument and a nitrogen blowing instrument adjustable test tube mounting seat

Abstract

The invention discloses a nitrogen blowing instrument and a nitrogen blowing instrument adjustable test tube mounting seat, which relates to the technical field of nitrogen blowing instruments, including a nitrogen blowing instrument base and a water bath heating pool, wherein the inner wall of the nitrogen blowing instrument base is fixed with a water bath heating pool. The nitrogen blowing instrument and the nitrogen blowing instrument adjustable test tube mounting seat drive the tray to move up by starting a motor to drive the screw rod and the tray thread transmission, and the tray will pull the movable seat to move toward the center position of the tray, so that the holder rotates around the rotating pin, so that the holder pushes the upper end of the sample test tube to flip and move toward the outer edge of the nitrogen blowing instrument base, and when the holder pushes the bottom end of the sample test tube to adjust its tilt, the sample test tube will produce elastic extrusion with the roller of the guide mechanism, ensuring that the sample test tube will not scrape and contact with the upper cover plate and the lower cover plate when it is exported, ensuring that the sample test tube has a safety protection function when it is taken out, and ensuring that the nitrogen blowing instrument can realize safe and fast export of the sample test tube.

Description

Technical Field

[0001] The invention relates to the technical field of nitrogen blowing instruments, in particular to a nitrogen blowing instrument and a nitrogen blowing instrument adjustable test tube mounting seat. Background Art

[0002] Nitrogen purge instrument is widely used. In gas phase, liquid phase and mass spectrometry analysis, inert gas, usually nitrogen, is used to purge the heated sample liquid to quickly concentrate the sample to be processed, achieving the effect of rapid separation and purification. Nitrogen purge instrument is mainly used for purification and preparation of analytical samples such as chromatography and mass spectrometry, and is used to accelerate the volatilization of solvents such as water, toluene, methanol, and acetone. It is widely used in food safety, medicine, pesticide residue detection, and clinical medicine.

[0003] According to the Chinese patent with the announcement number CN219573695U, a nitrogen blowdown instrument is disclosed. By setting an adjustment mechanism inside the nitrogen blowdown instrument body, the rack is driven to be pulled out from the nitrogen blowdown instrument by pulling the plug plate. The rotating shaft can be driven to rotate through the meshing action of the gear and the rack, so that the test tube can rotate around the center line of the rotating shaft. The sample conditions in each test tube can be observed through the observation window, and there is no need to manually touch the mounting frame carrying the test tube, which can effectively ensure the safety of product testing; and the operation is simple and easy to use; and the gas distribution plate arranged above the bracket can group the air guide tubes distributed in an annular shape on the bracket for gas transmission operation, which is easy to control. When the number of samples to be tested is small, the gas distribution valve of a single group can be controlled to open, which can save resources and improve the utilization rate of resources;

[0004] According to the Chinese patent with the announcement number CN202661322U, a nitrogen blowdown instrument sample rack lifting device is disclosed. The position of the slider can be controlled by rotating the lead screw, so that the slider rises or falls along the axial direction of the lead screw. Since the slider is fixedly connected to the lifting frame, the lifting of the slider drives the lifting of the lifting frame, and finally the lifting of the sample rack is controlled by the lifting frame. Since the entire lifting device is located below the lifting frame, it does not affect the use of the nitrogen blowdown instrument when in use.

[0005] When the above technical solution is in use, the sample test tubes are vertically inserted into the base of the nitrogen blowdown apparatus and need to be manually pulled out vertically during the removal process. This makes the removal of the test tubes affected by the narrow distance between adjacent test tubes and between the test tubes and the gas guide components. Therefore, it is impossible to ensure that the sample test tubes in the nitrogen blowdown apparatus can be safely and quickly exported. Summary of the invention

[0006] The object of the present invention is to provide a nitrogen blowing instrument and a nitrogen blowing instrument adjustable test tube mounting seat to solve the problems raised by the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable test tube mounting seat for a nitrogen blowing instrument, comprising a nitrogen blowing instrument base and a water bath heating pool, the inner wall of the nitrogen blowing instrument base is fixed with a water bath heating pool, a support column is installed at an equal angle inside the water bath heating pool, an upper cover plate and a lower cover plate are installed above the support column in parallel, an elastic limiting ring is sleeved between the upper cover plate and the lower cover plate, and a card slot for clamping the test tube is opened at an equal angle on the outer edges of the upper cover plate and the lower cover plate, a motor is installed in the middle of the upper cover plate and the lower cover plate, a screw is fixed to the bottom output end of the motor, the screw is connected to the center thread of the tray, and the tray is connected to the support column in a through sliding manner, and an adjustment port is opened on the surface of the tray;

[0008] The interior of the nitrogen blowdown instrument base is also provided with an adjustment mechanism, and the adjustment mechanism includes a fixed seat installed in the middle of the water bath heating pool, the outer edge of the fixed seat is rotatably connected with a connecting rod, and the end of the connecting rod away from the fixed seat is rotatably connected with a movable seat, the upper end of the movable seat passes through an adjustment port on the surface of the tray, the upper side surface of the movable seat is provided with a moving port, and a sliding block is slidably connected in the moving port, the sliding block is rotatably connected to the corner portion of the card seat with an L-shaped structure, and a guide mechanism for clamping and guiding the test tube is provided on the surface of the lower cover plate close to the card slot, and the guide mechanism includes a connecting seat docked with the lower cover plate, and one end of the connecting seat is sleeved with two rollers with a conical structure through a rotating shaft.

[0009] Preferably, the inner surface of the base is provided with a V-shaped notch, and the surface of the base is provided with equidistant water grooves.

[0010] Preferably, the sliding block is composed of an isosceles trapezoidal block and a rotating shaft welded to the top of the isosceles trapezoidal block, and the moving opening on the upper side of the movable seat is matched with the isosceles trapezoidal block of the sliding block for sliding.

[0011] Preferably, a sliding groove is provided on the edge surface of the lower cover plate close to the card slot, and a follower rod is inserted into the inside of the sliding groove. The follower rod is composed of a V-shaped support beam at the upper end and a frame-shaped shifting rod at the lower end. The V-shaped support beam at the upper end of the follower rod is connected to an elastic limiting ring, and a rotating pin is slidably connected in the frame-shaped shifting rod of the follower rod, and one end of the rotating pin is connected to the side wall of the upper end of the card seat.

[0012] Preferably, the connecting seat slides through the inner cavity and the slot at the edge of the lower cover plate, and the roller at one end of the connecting seat is used to cooperate with the elastic limiting ring to guide and clamp the sample tube.

[0013] Preferably, a spring a is fixed to the upper edge of the receiving seat away from the roller, a bracket is installed on the upper edge of the lower cover plate close to the slot, and one end of the spring a is fixed to the bracket.

[0014] Preferably, a plane bearing is butted against one end of the two rollers that are away from each other, and a spring b that abuts against the plane bearing is sleeved on the rotating shaft of the connecting seat.

[0015] A nitrogen blowdown instrument comprises a column and a gas distributor, wherein the bottom end of the column is provided with the aforementioned nitrogen blowdown instrument adjustable test tube mounting seat, and the bottom end of the column is fixed to the top center of an upper cover plate, the outer side of the column is sleeved with a gas distributor, the bottom end of the gas distributor is provided with a circular disk, and the outer edge of the circular disk is provided with a damping embracing member at equal angles.

[0016] Preferably, an air duct is inserted into the middle of the damping surround, the bottom end of the air duct is connected to a blowing needle, the upper end of the air distribution disk is connected to a control valve, the air ducts on the disk are equally divided into four groups, and an arc plate is installed on each group of air ducts.

[0017] Preferably, a connecting shaft is fixed to the lower surface of the middle part of the arc plate, a push-pull arm is movably connected to the upper edge of the gas distribution plate, the connecting shaft is docked with a reserved opening in the middle part of the push-pull arm, a barometer is provided at the upper end of the column, a gas supply hose is connected between the barometer and the gas distribution plate, and between the gas distribution plate and the air guide pipe, and a gas supply rigid pipe is installed between the barometer and the base of the nitrogen blowdown instrument.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the nitrogen blowdown instrument and the nitrogen blowdown instrument adjustable test tube mounting seat drive the tray upward by starting the motor to drive the lead screw and the tray thread transmission, and the tray will pull the movable seat to move toward the center position of the tray, so that the holder rotates around the rotating pin, so that the holder pushes the upper end of the sample test tube to flip and move toward the outer edge of the nitrogen blowdown instrument base, and when the holder pushes the bottom end of the sample test tube to adjust its tilt, the sample test tube will produce elastic extrusion with the roller of the guide mechanism, ensuring that the sample test tube will not scrape and contact with the upper cover plate and the lower cover plate when being led out, ensuring that the sample test tube has a safety protection function when being taken out, and ensuring that the nitrogen blowdown instrument can realize safe and fast export of the sample test tube.

[0019] 1. The nitrogen blowdown instrument and the nitrogen blowdown instrument adjustable test tube mounting seat can position and support the placed sample test tube through the V-shaped notch of the holder. When the motor is started to drive the lead screw and the tray thread transmission, the tray can slide and pull the movable seat through the adjustment port when moving upward. The movable seat moves toward the center of the tray and pushes the sliding block, so that the sliding block drives the bottom of the holder to move toward the center of the tray. At this time, the holder rotates around the rotating pin on the upper edge, and the corner of the holder and the rotating axis of the sliding block produce an angle deflection, which will prompt the holder to drive the bottom of the sample test tube to move upward and produce a lateral tilt adjustment, so that the upper end of the sample test tube flips and moves toward the outer edge of the nitrogen blowdown instrument base. The tray that is convenient to move upward can tilt all the sample test tubes outward, so that the narrow distance between adjacent test tubes and between the test tubes and the gas guide components will not affect the operation efficiency of taking out the sample test tubes;

[0020] 2. The nitrogen blowdown instrument and the nitrogen blowdown instrument adjustable test tube mounting seat tighten the sample test tube through the elastic limiting ring between the upper cover plate and the lower cover plate, so that the outer peripheral side surface of the sample test tube close to the lower cover plate rolls and abuts against the two rollers at one end of the connecting seat. When the sample test tube is inserted downward or pulled upward, the two conical rollers can guide the moving sample test tube to prevent deviation, and prevent direct contact between the sample test tube and the lower cover plate to cause scratching and wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the nitrogen blowing apparatus of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional explosion structure of the nitrogen blowing instrument base of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the sample test tube of the present invention inserted in the linkage of the adjustment mechanism;

[0024] Figure 4 It is a schematic diagram of the main cross-sectional structure of the sample test tube of the present invention inserted in the linkage of the adjustment mechanism;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the adjusting mechanism of the present invention pushing the sample test tube out of the nitrogen blowing instrument base;

[0026] Figure 6 This is a schematic diagram of the main cross-sectional structure of the adjusting mechanism of the present invention pushing the sample test tube out of the nitrogen blowing instrument base;

[0027] Figure 7 It is a schematic diagram of a first three-dimensional structure in which the guide mechanism of the present invention is installed between the upper cover plate and the lower cover plate;

[0028] Figure 8 A second three-dimensional structural schematic diagram of the guide mechanism of the present invention installed between the upper cover plate and the lower cover plate;

[0029] Fig. 9 It is a three-dimensional structural schematic diagram of the card holder of the present invention;

[0030] Fig.10 It is a three-dimensional structural schematic diagram of the guide mechanism of the present invention;

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the airway of the present invention.

[0032] In the figure: 1, nitrogen blowdown instrument base; 2, water bath heating pool; 3, support column; 4, column; 5, upper cover; 501, lower cover; 5011, slide; 502, elastic limit ring; 503, card slot; 504, motor; 505, screw rod; 506, tray; 507, adjustment port; 6, adjustment mechanism; 601, fixed seat; 602, connecting rod; 603, movable seat; 604, sliding block; 605, card seat; 606, connecting rod; 607, connecting rod; 608, connecting rod; 609, connecting rod; 610, connecting rod; 611, connecting rod; 612, connecting rod; 613, connecting rod; 614, connecting rod; 615, connecting rod; 616, connecting rod; 617, connecting rod; 618, connecting rod; 619, connecting rod; 620, connecting rod; 621, connecting rod; 622, connecting rod; 623, connecting rod; 624, connecting rod; 625, connecting rod; 626, connecting rod; 627, connecting rod; 628, connecting rod; 629, connecting rod; 630, connecting rod; 631, connecting rod; 632, connecting rod; 633, connecting rod; 634, connecting rod; 635, connecting rod; 636, connecting rod; 637, connecting rod; 638, connecting rod; 639, connecting rod; 640, connecting rod; 641, connecting rod; 642, connecting rod; 643, connecting rod; 644, connecting rod; 645, connecting rod; 646, connecting rod; 647, connecting rod; 648, connecting rod; 649, connecting rod; 650, connecting rod; 651 06. Rotating pin; 607. Follower rod; 7. Guide mechanism; 701. Connecting seat; 702. Bracket; 703. Spring a; 704. Roller; 705. Plane bearing; 706. Spring b; 8. Air distributor; 801. Disc; 802. Damping ring; 803. Air guide tube; 804. Air blowing needle; 805. Control valve; 9. Arc plate; 901. Connecting shaft; 902. Push-pull arm; 10. Barometer. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 8 and Fig.10 The present invention provides a technical solution: a nitrogen blowing instrument adjustable test tube mounting seat, comprising a nitrogen blowing instrument base 1 and a water bath heating pool 2, the inner wall of the nitrogen blowing instrument base 1 is fixed with the water bath heating pool 2, the water bath heating pool 2 is installed with a support column 3 at an equal angle inside the water bath heating pool 2, an upper cover plate 5 and a lower cover plate 501 are installed in parallel above the support column 3, an elastic limiting ring 502 is sleeved between the upper cover plate 5 and the lower cover plate 501, and a card slot 503 for clamping the test tube is opened at an equal angle on the outer edge of the upper cover plate 5 and the lower cover plate 501, a motor 504 is installed in the middle of the upper cover plate 5 and the lower cover plate 501, a screw rod 505 is fixed to the bottom output end of the motor 504, the screw rod 505 is connected to the center of the tray 506 with a thread, and the tray 506 is connected to the support column 3 in a through sliding manner, and an adjustment port 507 is opened on the surface of the tray 506;

[0035] An adjusting mechanism 6 is also provided inside the nitrogen blowing instrument base 1. The adjusting mechanism 6 includes a fixed seat 601 installed in the middle of the water bath heating pool 2. The outer edge of the fixed seat 601 is rotatably connected with a connecting rod 602. One end of the connecting rod 602 away from the fixed seat 601 is rotatably connected with a movable seat 603. The upper end of the movable seat 603 passes through an adjusting port 507 on the surface of the tray 506. A moving port is provided on the upper side of the movable seat 603, and a sliding block 604 is slidably connected in the moving port. The sliding block 604 is rotatably connected to the corner of the card seat 605 of the L-shaped structure. A guide mechanism 7 for clamping and guiding the test tube is provided on the surface of the lower cover plate 501 close to the card slot 503. The guide mechanism 7 includes a connecting seat 701 docking with the lower cover plate 501. One end of the connecting seat 701 is sleeved with two rollers 704 with a conical structure through a rotating shaft.

[0036] The connecting seat 701 slides through the inner cavity and the slot 503 on the edge of the lower cover plate 501. The roller 704 at one end of the connecting seat 701 is used to cooperate with the elastic limiting ring 502 to guide and clamp the sample test tube. A spring a703 is fixed to the upper edge of the connecting seat 701 away from the roller 704. A bracket 702 is installed on the upper edge of the lower cover plate 501 close to the slot 503. One end of the spring a703 is fixed to the bracket 702.

[0037] A plane bearing 705 is butted against one end of the two rollers 704 that is away from each other, and a spring b706 that abuts against the plane bearing 705 is sleeved on the rotating shaft of the connecting seat 701 .

[0038] In specific implementation, the sample test tube is inserted downward along the card slot 503 of the upper cover plate 5 and the lower cover plate 501, and the sample test tube is tightened by the elastic limiting ring 502 between the upper cover plate 5 and the lower cover plate 501, so that the outer peripheral side surface of the sample test tube close to the lower cover plate 501 rolls against the two rollers 704 at one end of the connecting seat 701. When the sample test tube is inserted downward or pulled upward, the two rollers 704 with a conical structure can guide the moving sample test tube to prevent deviation, and can prevent the direct contact between the sample test tube and the lower cover plate 501 from causing scratches and wear;

[0039] When sample tubes of different sizes are inserted into the card slot 503, the outer wall of the tube squeezes the two rollers 704 on the connecting seat 701, so that the two rollers 704 can move laterally along the rotating shaft on the connecting seat 701, thereby ensuring that the rollers 704 with a conical structure can guide the sample tubes to prevent deviation, and the spring b706 squeezes the rollers 704, so that the two rollers 704 have a clamping effect of approaching each other, and at the same time, when the rollers 704 rotate, the plane bearing 705 abuts against the spring b706, ensuring that the rollers 704 will not be squeezed by the spring b706 during rotation, resulting in poor rotation performance;

[0040] When the sample test tube is not inserted into the card slot 503, the spring a703 pulls the connecting seat 701 and the bracket 702, so that the connecting seat 701 can drive the roller 704 to move to the outside of the card slot 503, so that the guiding mechanism 7 can adapt to clamping and guiding test tubes of different sizes.

[0041] See also Figure 3-Figure 9 The inner surface of the holder 605 is provided with a V-shaped notch, and the surface of the holder 605 is provided with equidistant water grooves. When the sample tube is inserted into the holder 605, the sample tube can be positioned through the V-shaped notch on the inner surface of the holder 605, and the hot water in the water bath heating pool 2 can pass through the water groove to heat the sample tube, ensuring that the sample tube can fully contact with the hot water;

[0042] The sliding block 604 is composed of an isosceles trapezoidal block and a rotating shaft welded on the top of the isosceles trapezoidal block. The moving opening on the upper side of the movable seat 603 and the isosceles trapezoidal block of the sliding block 604 are matched and slid. The moving opening and the isosceles trapezoidal block of the sliding block 604 are matched and slid, so that the holder 605 can move horizontally on the movable seat 603.

[0043] A slide groove 5011 is provided on the edge surface of the lower cover 501 near the card slot 503, and a follower rod 607 is inserted into the inside of the slide groove 5011. The follower rod 607 consists of a V-shaped support beam at the upper end and a frame-shaped shifting rod at the lower end. The V-shaped support beam at the upper end of the follower rod 607 is connected to the elastic limiting ring 502, and a rotating pin 606 is slidably connected in the frame-shaped shifting rod of the follower rod 607, and one end of the rotating pin 606 is connected to the side wall of the upper end of the card seat 605.

[0044] In a specific implementation, when the sample test tube is inserted into the nitrogen blowdown instrument base 1 along the card slot 503 of the upper cover plate 5 and the lower cover plate 501, the sample test tube will squeeze the elastic limiting ring 502 to open outward, so that the elastic limiting ring 502 will push the V-shaped support beam at the upper end of the follower rod 607, so that the frame-shaped lever at the lower end of the follower rod 607 will move along the slide slot 5011, so that the follower rod 607 will pull the card seat 605 to move toward the edge of the tray 506 through the rotating pin 606. When moving, the sliding block 604 will be driven to slide forward in the moving opening of the movable seat 603. When the bottom end of the sample test tube abuts against the clamping seat 605, the sample test tube can be positioned and supported by the V-shaped notch inside the clamping seat 605, and the sample test tube can be stably clamped between the upper cover plate 5 and the lower cover plate 501 by tightening the elastic limiting ring 502, and the sample test tube can be limited by the V-shaped notch inside the clamping seat 605, so as to prevent the sample test tube from shaking and deviating when placed;

[0045] When the sample tube completes the sample concentration operation, the motor 504 is started to drive the screw rod 505 to rotate forward, so that the screw rod 505 and the tray 506 are threadedly transmitted, so that the tray 506 moves up smoothly along the support column 3. When the tray 506 moves up, it can slide and pull the movable seat 603 through the adjustment port 507, and the connecting rod 602 between the fixed seat 601 and the movable seat 603 will be lifted up. At this time, the sample tube is still restricted between the elastic limiting ring 502 and the guide mechanism 7. The fixed position of the elastic limiting ring 502 will cause the follower rod 607 to remain unchanged, and the movable seat 603 moves toward the center of the tray 506 to squeeze the sliding block 604, so that the sliding block 604 will drive the bottom of the holder 605 to move toward the center of the tray 506. At this time, the holder 605 will rotate around the rotating pin 606 on the upper edge, and at the same time, the corner of the holder 605 will produce an angular deflection with the rotating axis of the sliding block 604, which will prompt the holder 605 to drive the bottom of the sample tube to move upward and produce a lateral tilt, so that the upper end of the sample tube flips and moves toward the outer edge of the nitrogen blowdown instrument base 1, and the tray 506 that is conveniently moved upward can tilt all the sample tubes outward, so that the staff can quickly take out the sample tubes in the nitrogen blowdown instrument base 1. When the holder 605 pushes the bottom end of the sample tube to tilt it, the sample tube will produce elastic compression with the roller 704 of the guide mechanism 7, ensuring that the sample tube will not scrape and contact with the upper cover plate 5 and the lower cover plate 501 when being led out, ensuring that the sample tube has a safe protection effect when being taken out;

[0046] When the sample test tube is taken out from between the elastic limiting ring 502 and the guide mechanism 7, the elastic limiting ring 502 will be reset and contracted, so that the elastic limiting ring 502 will pull the follower rod 607 and the holder 605 to move toward the center direction of the tray 506. At this time, the holder 605 will be reset to a vertical placement state. After that, after the sample test tube is taken out from the nitrogen blowing instrument base 1, the motor 504 is started to drive the screw rod 505 to reverse, so that the tray 506 can drive the holder 605 to move downward;

[0047] When sample tubes are inserted into a certain number of the slots 503 at the outer edges of the upper cover plate 5 and the lower cover plate 501, and no sample tubes are inserted in other positions, the elastic limiting ring 502 opens outward at the slots 503 where sample tubes are present, and the elastic limiting ring 502 remains in place at the slots 503 where no sample tubes are present. At this time, the follower rod 607 at the slots 503 where no sample tubes are present limits the holder 605 at a predetermined position without changing.

[0048] See also Figure 1 and Fig.11A nitrogen blowing instrument comprises a column 4 and a gas distribution plate 8, the bottom end of the column 4 is installed with the aforementioned nitrogen blowing instrument adjustable test tube mounting seat, and the bottom end of the column 4 is fixed to the top center of the upper cover plate 5, the outer side of the column 4 is sleeved with a gas distribution plate 8, the bottom end of the gas distribution plate 8 is installed with a disk 801, and the outer edge of the disk 801 is installed with a damping surround 802 at equal angles; the middle part of the damping surround 802 is interspersed with an air guide tube 803, and the damping surround 802 is a prior art, and reference can be made to Chinese utility model patent CN219935454U A quick-adjustable blow needle assembly of a nitrogen blow apparatus is disclosed, wherein a damping ring 802 is used for vertically damping movable installation of an air guide tube 803 to prevent the air guide tube 803 from slipping when in use; a blow needle 804 is connected to the bottom end of the air guide tube 803, a control valve 805 is connected to the upper end of an air distribution plate 8, the air guide tubes 803 on a disc 801 are equally divided into four groups, and an arc plate 9 is installed on each group of air guide tubes 803, four control valves 805 are arranged on the air distribution plate 8, and each control valve 805 is used to correspondingly control the air guide tubes 803 in the same group;

[0049] A connecting shaft 901 is fixed to the lower surface of the middle part of the arc plate 9, and a push-pull arm 902 is movably connected to the upper edge of the gas distribution plate 8. The connecting shaft 901 is connected to the reserved opening in the middle part of the push-pull arm 902. A barometer 10 is arranged on the upper end of the column 4. A gas supply hose is connected between the barometer 10 and the gas distribution plate 8, and between the gas distribution plate 8 and the air guide pipe 803. A gas supply hard pipe is installed between the barometer 10 and the nitrogen blowdown instrument base 1.

[0050] During specific implementation, by pulling down the push-pull arm 902, the push-pull arm 902 is rotated and pressed down on the gas distribution plate 8, so that the push-pull arm 902 squeezes the connecting shaft 901 at the bottom of the arc plate 9 to drive the air guide tubes 803 of the same group on the arc plate 9 to move downward along the damping ring 802. When the blowing needle 804 at the bottom end of the air guide tube 803 is inserted into the sample test tube, by loosening the push-pull arm 902, each air guide tube 803 can be restricted to a specified height under the restriction of the damping ring 802. Conversely, when the sample test tube needs to be taken out, by pulling up the push-pull arm 902, the air guide tubes 803 of the same group can be pulled up synchronously through the arc plate 9, ensuring that the air guide tubes 803 of the same group can be lifted and lowered synchronously, which is convenient for removing the sample test tube from the nitrogen blowdown instrument base 1.

[0051] To summarize, the sample test tube is inserted into the nitrogen blowdown instrument base 1 along the card slot 503 of the upper cover plate 5 and the lower cover plate 501, and then the nitrogen is sent to the gas distribution plate 8 along the gas delivery rigid pipe and the gas delivery hose, and the flow rate of the delivered gas is monitored by the barometer 10 between the gas delivery rigid pipe and the gas delivery hose, and the amount of nitrogen entering the four groups of air guide tubes 803 from the gas distribution plate 8 is adjusted by adjusting the four control valves 805 to ensure that each group of air guide tubes 803 sends nitrogen evenly along the blowing needle 804 into the test tube for nitrogen blowing, so that the sample is concentrated, and the sample test tube is heated by the water bath heating pool 2. The contents not described in detail in this description belong to the prior art known to professional and technical personnel in this field.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 nitrogen blowing instrument adjustable test tube mounting base, comprising a nitrogen blowing instrument base (1) and a water bath heating pool (2), characterized in that: A water bath heating pool (2) is fixed to the inner wall of the nitrogen blowdown instrument base (1), a support column (3) is installed at an equal angle inside the water bath heating pool (2), an upper cover plate (5) and a lower cover plate (501) are installed in parallel above the support column (3), an elastic limiting ring (502) is sleeved between the upper cover plate (5) and the lower cover plate (501), and a clamping groove (503) for clamping a test tube is opened at an equal angle on the outer edges of the upper cover plate (5) and the lower cover plate (501), a motor (504) is installed in the middle of the upper cover plate (5) and the lower cover plate (501), a screw rod (505) is fixed to the bottom output end of the motor (504), the screw rod (505) is connected to the center of the tray (506) by a thread, and the tray (506) and the support column (3) are connected to each other by sliding, and an adjustment port (507) is opened on the surface of the tray (506); The nitrogen blowdown instrument base (1) is further provided with an adjustment mechanism (6), the adjustment mechanism (6) comprising a fixed seat (601) installed in the middle of the water bath heating pool (2), the outer edge of the fixed seat (601) is rotatably connected to a connecting rod (602), the end of the connecting rod (602) away from the fixed seat (601) is rotatably connected to a movable seat (603), the upper end of the movable seat (603) penetrates the adjustment port (507) on the surface of the tray (506), and the upper end of the movable seat (603) is A moving opening is provided on the side, and a sliding block (604) is slidably connected in the moving opening, and the sliding block (604) is rotatably connected to the corner of the L-shaped clamping seat (605). A guide mechanism (7) for clamping and guiding the test tube is provided on the surface of the lower cover plate (501) close to the clamping groove (503), and the guide mechanism (7) includes a connecting seat (701) connected to the lower cover plate (501), and one end of the connecting seat (701) is sleeved with two rollers (704) of a conical structure through a rotating shaft; The inner surface of the card seat (605) is provided with a V-shaped notch, and the surface of the card seat (605) is provided with water grooves at equal distances; The sliding block (604) is composed of an isosceles trapezoidal block and a rotating shaft welded to the top of the isosceles trapezoidal block, and the moving opening on the upper side of the movable seat (603) is matched with the isosceles trapezoidal block of the sliding block (604) for sliding; A sliding groove (5011) is provided on the edge surface of the lower cover plate (501) close to the clamping groove (503), and a follower rod (607) is inserted into the interior of the sliding groove (5011). The follower rod (607) is composed of a V-shaped support beam at the upper end and a frame-shaped shifting rod at the lower end. The V-shaped support beam at the upper end of the follower rod (607) is connected to the elastic limiting ring (502), and a rotating pin (606) is slidably connected to the frame-shaped shifting rod of the follower rod (607), and one end of the rotating pin (606) is connected to the side wall of the upper end of the clamping seat (605).

2. The nitrogen blowing instrument adjustable test tube mounting seat according to claim 1, characterized in that: The connecting seat (701) slides through the inner cavity and the slot (503) at the edge of the lower cover plate (501), and the roller (704) at one end of the connecting seat (701) is used to cooperate with the elastic limiting ring (502) to guide and clamp the sample test tube.

3. The nitrogen blowing instrument adjustable test tube mounting seat according to claim 2, characterized in that: A spring a (703) is fixed to the upper edge of the connecting seat (701) at one end away from the roller (704), and a bracket (702) is installed on the upper edge of the lower cover plate (501) close to the slot (503), and one end of the spring a (703) is fixed to the bracket (702).

4. The nitrogen blowing instrument adjustable test tube mounting seat according to claim 3, characterized in that: A plane bearing (705) is butt-jointed at one end of the two rollers (704) that is away from each other, and a spring b (706) that abuts against the plane bearing (705) is sleeved on the rotating shaft of the connecting seat (701).

5. A nitrogen blowing apparatus, comprising a column (4) and a gas distribution plate (8), characterized in that: The bottom end of the column (4) is installed with the nitrogen blowdown instrument adjustable test tube mounting seat according to any one of claims 1 to 4, and the bottom end of the column (4) is fixed to the top center of the upper cover plate (5), and the outer side of the column (4) is sleeved with a gas distribution plate (8), and the bottom end of the gas distribution plate (8) is installed with a disk (801), and the outer edge of the disk (801) is installed with a damping ring member (802) at an equal angle.

6. A nitrogen blowing apparatus according to claim 5, characterized in that: An air guide tube (803) is inserted into the middle of the damping surround (802), the bottom end of the air guide tube (803) is connected to a blowing needle (804), the upper end of the air distribution disk (8) is connected to a control valve (805), the air guide tubes (803) on the disk (801) are equally divided into four groups, and an arc plate (9) is installed on each group of the air guide tubes (803).

7. A nitrogen blowing apparatus according to claim 6, characterized in that: A connecting shaft (901) is fixed to the lower surface of the middle part of the arc plate (9), and a push-pull arm (902) is movably connected to the upper edge of the gas distribution plate (8). The connecting shaft (901) is butted against a reserved opening in the middle part of the push-pull arm (902). A barometer (10) is arranged at the upper end of the column (4). A gas supply hose is connected between the barometer (10) and the gas distribution plate (8), and between the gas distribution plate (8) and the gas guide pipe (803). A gas supply hard pipe is installed between the barometer (10) and the nitrogen blowdown instrument base (1).

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