CN112964811B

CN112964811B - Fixed nitrogen blowing instrument

Info

Publication number: CN112964811B
Application number: CN202110163124.1A
Authority: CN
Inventors: 杨德毅; 杨繁婧
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2022-06-21
Anticipated expiration: 2041-02-05
Also published as: CN112964811A

Abstract

The invention provides a fixed nitrogen blowing instrument. The test tube that it had solved current nitrogen and blown the appearance and placed on the carousel formula produces easily and rocks, and the liquid splashes and leads to the experiment to appear the problem of deviation easily under blowing of air blowing needle. According to the invention, the rotating block and the clamping block rotate towards one end far away from the clamping groove under the driving of the torsion spring until the clamping block on the rotating block is contacted with the clamping rod, the clamping block on the rotating block is driven to rotate towards the clamping groove and clamp the test tube by the rotating block and the fixing ring which are always meshed, the clamping block on the rotating block is driven to rotate towards the clamping groove and clamp the test tube by screwing the nut, the rotating disc and the test tube on the rotating disc can be locked by the fixing ring which can move along the length direction of the guide groove, when the test tube is placed, the fixing ring moves downwards to separate the fixing ring from the rotating block, the test tube can be placed after the rotating disc is rotated randomly, the fixing ring moves upwards after the test tube is placed, the fixing pin is inserted into the fixing hole along the limiting rod to complete the fixing of the fixing ring, and the height between the lower end of the blowing needle and the liquid level in the test tube can be kept constant all the time.

Description

Fixed nitrogen blowing instrument

Technical Field

The invention belongs to the technical field of experimental instruments, and particularly relates to a fixed nitrogen blowing instrument.

Background

The nitrogen blowing instrument is mainly used for purifying and preparing analysis samples such as chromatography, mass spectrometry and the like, nitrogen is blown into the surface of a heating sample to concentrate the sample, the volatilization of solvents such as water, methylbenzene, methanol and acetone is accelerated, and the nitrogen blowing instrument has the characteristics of time saving, convenient operation, easy control and the like, is widely applied to the fields of food safety, medicines, pesticide residue detection, clinical medicine generation and the like, comprises a heating device and a blowing needle, and comprises a water bath kettle and a heater arranged in the water bath kettle.

The nitrogen blower uses the air flow and temperature around the sample to increase the liquid evaporation rate. Because nitrogen is an inert gas, the nitrogen can play a role in isolating oxygen and preventing the reagent in the test tube from being oxidized. The nitrogen blowing instrument breaks the gas-liquid balance above the liquid by utilizing the rapid flow of the nitrogen, thereby accelerating the volatilization speed of the liquid; and the temperature is increased by a water bath heating mode, thereby achieving the purpose of concentration.

Current nitrogen blows the appearance and fixes placing the test tube on the carousel through the spring of cover establishing in the carousel periphery usually, in the time of practical use, need the user to pull open the spring of placing on the position, make the space between spring and the carousel be greater than behind the diameter of test tube, put into the test tube again, it fixes the test tube through the reseing of spring self behind the unclamping spring, the test tube is comparatively inconvenient and can't fix the test tube when placing, the test tube produces easily and rocks, lead to nitrogen to blow appearance in use, the in-process that the needle of blowing leads to solution to splash easily, thereby lead to the failure of experiment and test data's inaccuracy, it is comparatively inconvenient to use, prior art exists the part that can improve.

Disclosure of Invention

The device provided by the invention aims at the defects that the test tube placed on the rotary disc type easily shakes, and the experiment is easy to deviate due to liquid splashing under the blowing of the blowing needle, and provides the fixed nitrogen blowing instrument capable of fixing the test tube.

The invention aims to be realized by the following technical scheme: a fixed nitrogen blowing instrument comprises a water bath kettle and a support rod which is rotatably arranged in the water bath kettle, wherein a fixed disk for installing a plurality of air blowing needles and a rotary disk for placing a plurality of test tubes are respectively and fixedly arranged on the support rod from top to bottom, a plurality of clamping grooves for clamping the test tubes are arranged on the rotary disk, the clamping grooves and the air blowing needles are respectively and annularly distributed on the rotary disk and the fixed disk, the clamping grooves are positioned under the air blowing needles, and the clamping grooves are in one-to-one correspondence with the air blowing needles, and the fixed nitrogen blowing instrument is characterized in that a rotating shaft is fixedly arranged between two adjacent clamping grooves, a rotating block is rotatably arranged on the rotating shaft, a clamping block which extends into the clamping grooves and is used for locking the test tubes is fixedly arranged on the rotating block, a torsional spring which drives the rotating block to rotate around the rotating shaft to enable the clamping block to rotate towards the direction far away from the clamping grooves is arranged on the rotating shaft, and the other end of the torsional spring is fixedly arranged on the rotating block, be provided with a cover on the water bath inner wall and establish the solid fixed ring at above-mentioned a plurality of turning block peripheries, the turning block meshes with this solid fixed ring's inner wall all the time, and this solid fixed ring's outer wall and the inner wall laminating of above-mentioned water bath.

As preferred, fixed ring's fixed a plurality of gag lever posts that are provided with in periphery, set up a plurality of guide ways that run through the water-bath and be used for the above-mentioned gag lever post of joint and extend along vertical direction on the water-bath, fixed ring can pass through the gag lever post joint in the guide way and along guide way length direction removal make fixed ring and turning block meshing or break away from with the turning block, be provided with the fixed establishment who locks fixed ring when fixed ring and turning block meshing on the water-bath.

Preferably, the fixing mechanism comprises a fixing hole formed in the upper end of the guide groove and a locking pin sleeved on the limiting rod, the fixing hole penetrates through the water bath kettle, the diameter of the fixing hole is larger than the width of the guide groove, and the locking pin is inserted into the fixing hole and can move along the length direction of the limiting rod until the locking pin is separated from the fixing hole, so that the limiting rod drives the fixing ring to move downwards along the length direction of the guide groove.

Preferably, the number of the guide grooves and the number of the limiting rods are four, and the limiting rods correspond to the guide grooves one to one.

Preferably, the two fixing mechanisms are arranged and located on the same straight line.

Preferably, the turntable is fixedly provided with a plurality of clamping rods used for limiting the rotating range of the rotating block, one end of the rotating block, facing the clamping rods, is fixedly provided with a clamping block matched with the clamping rods, and when the clamping block is in contact with the clamping rods, the clamping block on the rotating block is positioned at one end, far away from the turntable, of the clamping groove.

Preferably, sixteen rotating shafts, rotating blocks, clamping blocks, torsion springs, clamping rods, clamping blocks and clamping grooves are arranged on the rotating shafts, the rotating blocks, the clamping rods and the clamping grooves respectively, and the rotating shafts, the rotating blocks, the clamping rods and the clamping blocks correspond to the clamping grooves in a one-to-one mode.

Preferably, the turntable is rotatably provided with a nut for locking the turntable, and the nut is sleeved on the support rod and is in threaded connection with the support rod.

Preferably, racks are arranged on the outer shell of the air blowing needle along the length direction of the air blowing needle, motors with the same number as the air blowing needles are mounted on the fixed disc, the motors correspond to the air blowing needles one to one respectively, a gear is fixedly mounted on an output shaft of each motor, the gear is meshed with the racks on the air blowing needles, and an encoder is further arranged at the tail end of each motor; photoelectric liquid level sensors with the same number as the air blowing needles are installed at the lower end of the fixed disc and are located right above the test tubes in the clamping grooves.

Preferably, a PLC control box is further arranged on the shell of the water bath kettle, the PLC is Siemens S7-1200 series PLC, and the motor, the encoder and the photoelectric liquid level sensor are electrically connected with the PLC.

Compared with the prior art, the invention has the following beneficial effects: when the test tube is not placed, the rotating block and the clamping block are driven by the torsion spring to rotate towards one end far away from the clamping groove until the clamping block on the rotating block is contacted with the clamping rod, the rotating disc is rotated after the test tube is placed in the clamping groove, the clamping block on the rotating block is driven to rotate towards the clamping groove and clamp the test tube by the rotating block and the fixing ring which are always meshed, the rotating disc and the test tube on the rotating disc can be locked by screwing the nut, through the fixing ring which can move along the length direction of the guide groove, when the test tube is placed, the fixing ring moves downwards to separate the fixing ring from the rotating block, the test tube can be placed after the turntable is rotated freely, the test tube is convenient to place, the fixing ring is moved upwards after the test tube is placed, the locking pin is inserted into the fixing hole along the limiting rod, and the fixing of the fixing ring can be completed, and the height between the lower end of the air blowing needle and the liquid level of the liquid in the test tube can be kept constant all the time.

Drawings

FIG. 1 is an overall structural view of the present invention;

FIG. 2 is a sectional view of the inner structure of the water bath;

FIG. 3 is an overall structural view at the turning block;

FIG. 4 is an enlarged view at B in FIG. 3;

fig. 5 is an enlarged view of a portion a in fig. 2.

The labels in the figure are: 1. a water bath kettle; 2. a support bar; 3. an air blowing needle; 4. fixing the disc; 5. a turntable; 6. a card slot; 7. a rotating shaft; 8. rotating the block; 9. a clamping block; 10. a torsion spring; 11. a fixing ring; 12. a guide groove; 13. a fixing mechanism; 14. a fixing hole; 15. a locking pin; 16. a clamping and connecting rod; 17. a clamping block; 18. a nut; 19. a rack; 20. a motor; 21. a gear; 22. an encoder; 23. a photoelectric liquid level sensor; 24. and a PLC control box.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings to which: as shown in fig. 1-5, a fixed nitrogen blowing instrument comprises a water bath 1 and a support rod 2 rotatably disposed in the water bath 1, wherein the support rod 2 is respectively and fixedly provided with a fixed disk 4 for mounting a plurality of blowing needles 3 and a turntable 5 for placing a plurality of test tubes from top to bottom, the turntable 5 is provided with a plurality of clamping slots 6 for clamping the test tubes, the clamping slots 6 and the blowing needles 3 are respectively and annularly distributed on the turntable 5 and the fixed disk 4, the clamping slots 6 are located under the blowing needles 3, the clamping slots 6 correspond to the blowing needles 3 one by one, a rotating shaft 7 is fixedly disposed between two adjacent clamping slots 6, a rotating block 8 is rotatably disposed on the rotating shaft 7, a clamping block 9 extending into the clamping slots 6 and used for locking the test tubes is fixedly disposed on the rotating block 8, a torsion spring 10 is disposed on the rotating shaft 7 for driving the rotating block 8 to rotate around the rotating shaft 7 to enable the clamping block 9 to rotate in a direction away from the clamping slots 6, the fixed setting of one end of this torsional spring 10 is on pivot 7 the other end is fixed to be set up on turning block 8, be provided with a cover on the 1 inner wall of water bath and establish the solid fixed ring 11 in above-mentioned a plurality of turning block 8 peripheries, turning block 8 meshes with the inner wall of this solid fixed ring 11 all the time, and the outer wall of this solid fixed ring 11 laminates with the inner wall of above-mentioned water bath 1, it is provided with the nut 18 that is used for locking carousel 5 to rotate on the carousel 5, and this nut 18 cover is established on above-mentioned bracing piece 2 and is passed through threaded connection with bracing piece 2. Rotate carousel 5, drive the tight piece 9 of clamp on the turning block 8 to the fixed of test tube of 6 rotations of draw-in groove and clamp in the tight draw-in groove 6 through the rotating ring that meshes all the time and turning block 8 to through nut 18 locking carousel 5, placing of test tube is more stable pressing from both sides tight back.

The fixed four gag lever posts that are provided with in fixed ring 11's periphery, set up four guide ways 12 that run through water bath 1 and be used for the above-mentioned gag lever post of joint and extend along vertical direction on the water bath 1, gag lever post and guide ways 12 one-to-one, fixed ring 11 can pass through the gag lever post joint and make fixed ring 11 and the meshing of turning block 8 or break away from with turning block 8 in guide ways 12 and along the 12 length direction removal of guide ways, be provided with the fixed establishment 13 of the solid fixed ring 11 of locking when fixed ring 11 and the meshing of turning block 8 on the water bath 1. The fixing mechanism 13 comprises a fixing hole 14 arranged at the upper end of the guide groove 12 and a locking pin 15 sleeved on the limiting rod, the fixing hole 14 penetrates through the water bath kettle 1, the diameter of the fixing hole 14 is larger than the width of the guide groove 12, and the locking pin 15 is inserted into the fixing hole 14 and can move along the length direction of the limiting rod until the locking pin 15 is separated from the fixing hole 14, so that the limiting rod drives the fixing ring 11 to move downwards along the length direction of the guide groove 12. The two fixing mechanisms 13 are arranged and located on the same straight line. Can make solid fixed ring 11 and turning block 8 break away from through gag lever post and guide way 12, can rotate 5 backs wantonly and place the test tube, it is comparatively convenient to place the test tube, places at the test tube and accomplishes back and remove solid fixed ring 11, can accomplish the fixed of solid fixed ring 11 in inserting the fixed orifices 14 with stop pin 15 along the gag lever post.

The rotary table 5 is fixedly provided with a plurality of clamping rods 16 used for limiting the rotation range of the rotating block 8, one end, facing the clamping rod 16, of the rotating block 8 is fixedly provided with a clamping block 17 matched with the clamping rod 16, and when the clamping block 17 is in contact with the clamping rod 16, the clamping block 9 on the rotating block 8 is located at one end, far away from the rotary table 5, in the clamping groove 6. The rotating shaft 7, the rotating block 8, the clamping block 9, the torsion spring 10, the clamping rod 16, the clamping block 17 and the clamping groove 6 are respectively provided with sixteen parts, and the rotating shaft 7, the rotating block 8, the clamping block 9, the torsion spring 10, the clamping rod 16, the clamping block 17 and the clamping groove 6 are in one-to-one correspondence. The rotation angle of the rotating block 8 and the clamping block 9 is limited, the clamping block 9 is prevented from contacting with the fixing ring 11 under the driving of the torsion spring 10, a large number of reagents can be detected simultaneously, and the measuring efficiency is high.

When not placing the test tube, turning block 8 rotates until the one end of draw-in groove 6 with pressing from both sides tight piece 9 and keeping away from under the drive of torsional spring 10 one end rotation on the turning block 8 and joint pole 16 contact, the test tube is put into draw-in groove 6 after, rotate carousel 5, press from both sides tight piece 9 to draw-in groove 6 internal rotation and press from both sides tight test tube on turning block 8 and the solid fixed ring 11 drive turning block 8 through meshing all the time, can lock the test tube on carousel 5 and the carousel 5 on the nut 18 of screwing, through can follow the solid fixed ring 11 that the 12 length direction of guide way removed, when placing the test tube, with solid fixed ring 11 moves down and makes solid fixed ring 11 and turning block 8 break away from, can rotate the carousel 5 wantonly and place the test tube, it is comparatively convenient to place the test tube, and remove solid fixed ring 11 after the test tube is placed to completion, insert solid fixed ring 11 in the fixed orifices 14 along the gag lever with stop pin 15.

A rack 19 is arranged on the outer shell of the air blowing needle 3 along the length direction of the air blowing needle 3, motors 20 with the same number as the air blowing needles 3 are mounted on the fixed disc, the motors 20 are respectively in one-to-one correspondence with the air blowing needles 3, a gear 21 is fixedly mounted on an output shaft of the motor 20, the gear 21 is meshed with the rack 19 on the air blowing needle 3, and an encoder 22 is further arranged at the tail end of the motor 20; photoelectric liquid level sensors 23 with the same number as the air blowing needles 3 are installed at the lower end of the fixed disc, and the photoelectric liquid level sensors 23 are located right above the test tubes in the clamping grooves. The shell of the water bath kettle is also provided with a PLC control box 24, the PLC is Siemens S7-1200 series PLC, and the motor 20, the encoder 22 and the photoelectric liquid level sensor 23 are electrically connected with the PLC

Every needle of blowing 3 all corresponds motor 20 of installation, motor 20 can drive needle of blowing 3 and slide from top to bottom alone or together, encoder 22 is used for detecting motor 20's rotational speed and circle speed, thereby control needle of blowing 3's gliding distance from top to bottom and speed, photoelectric liquid level sensor 23 is used for detecting the liquid level height of the liquid of placing in the test tube in the draw-in groove, this nitrogen blows the appearance when the operation process, needle of blowing 3 inserts the top that the test tube is located the liquid in the test tube, photoelectric liquid level sensor 23 can detect the initial liquid level height of liquid in the test tube, when the liquid level decline of test tube, the liquid height that photoelectric liquid level sensor 23 detected exceeds certain limit, then needle of blowing 3 descends above this test tube of motor 20 drive, keep the height between the lower extreme of needle of blowing 3 and the liquid level in the test tube unchangeable all the time.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A fixed nitrogen blowing instrument comprises a water bath kettle (1) and a support rod (2) which is rotatably arranged in the water bath kettle (1), wherein the support rod (2) is respectively and fixedly provided with a fixed disk (4) for installing a plurality of air blowing needles (3) and a turntable (5) for placing a plurality of test tubes from top to bottom, the turntable (5) is provided with a plurality of clamping grooves (6) for clamping the test tubes, the clamping grooves (6) and the air blowing needles (3) are respectively and annularly distributed on the turntable (5) and the fixed disk (4), the clamping grooves (6) are positioned under the air blowing needles (3), the clamping grooves (6) are in one-to-one correspondence with the air blowing needles (3), the fixed nitrogen blowing instrument is characterized in that a rotating shaft (7) is fixedly arranged between two adjacent clamping grooves (6), a rotating block (8) is rotatably arranged on the rotating shaft (7), a clamping block (9) which extends into the clamping grooves (6) and is used for locking the test tubes is fixedly arranged on the rotating block (8), it makes tight piece (9) to keeping away from draw-in groove (6) direction pivoted torsional spring (10) to be provided with drive turning block (8) on pivot (7) and revolute pivot (7) and rotate, and the one end of this torsional spring (10) is fixed to be set up on pivot (7) other end is fixed to be set up on turning block (8), be provided with on water bath (1) inner wall that a cover establishes solid fixed ring (11) in a plurality of turning block (8) periphery, turning block (8) mesh with the inner wall of this solid fixed ring (11) all the time, the outer wall of this solid fixed ring (11) and the inner wall laminating of above-mentioned water bath (1).

2. The fixed nitrogen blowing instrument of claim 1, wherein a plurality of limiting rods are fixedly arranged on the periphery of the fixed ring (11), a plurality of guide grooves (12) which penetrate through the water bath (1) and are used for clamping the limiting rods and extend in the vertical direction are formed in the water bath (1), the fixed ring (11) can be clamped in the guide grooves (12) through the limiting rods and can move in the length direction of the guide grooves (12) to enable the fixed ring (11) to be meshed with the rotating block (8) or to be separated from the rotating block (8), and a fixing mechanism (13) which locks the fixed ring (11) when the fixed ring (11) is meshed with the rotating block (8) is arranged on the water bath (1).

3. The fixed nitrogen blowing instrument according to claim 2, wherein the fixing mechanism (13) comprises a fixing hole (14) formed at the upper end of the guide groove (12) and a locking pin (15) sleeved on the limiting rod, the fixing hole (14) penetrates through the water bath (1) and has a diameter larger than the width of the guide groove (12), and the locking pin (15) is inserted into the fixing hole (14) and can move along the length direction of the limiting rod until the locking pin (15) is separated from the fixing hole (14), so that the limiting rod drives the fixing ring (11) to move downwards along the length direction of the guide groove (12).

4. A fixed nitrogen blowing instrument according to claim 3, characterized in that, four guide slots (12) and four limit rods are provided, and the limit rods correspond to the guide slots (12) one by one.

5. A stationary nitrogen blowing apparatus according to claim 3, characterized in that said fixing means (13) are provided in two and in the same line.

6. A fixed nitrogen blowing instrument according to claim 1, wherein a plurality of clamping rods (16) for limiting the rotation range of the rotating block (8) are fixedly arranged on the rotating disc (5), a clamping block (17) matched with the clamping rods (16) is fixedly arranged at one end of the rotating block (8) facing the clamping rods (16), and when the clamping block (17) is contacted with the clamping rods (16), the clamping block (9) on the rotating block (8) is positioned at one end, far away from the rotating disc (5), in the clamping groove (6).

7. The fixed nitrogen blowing instrument according to claim 3 or 6, wherein the rotating shaft (7), the rotating block (8), the clamping block (9), the torsion spring (10), the clamping rod (16), the clamping block (17) and the clamping groove (6) are respectively provided with sixteen parts, and the rotating shaft (7), the rotating block (8), the clamping block (9), the torsion spring (10), the clamping rod (16) and the clamping block (17) correspond to the clamping groove (6) one to one.

8. A fixed nitrogen blowing instrument according to claim 1, characterized in that a nut (18) for locking the rotating disc (5) is rotatably arranged on the rotating disc (5), the nut (18) is sleeved on the supporting bar (2) and is connected with the supporting bar (2) through screw thread.

9. The fixed nitrogen blowing instrument according to claim 1, wherein a rack (19) is arranged on the housing of the blowing needle (3) along the length direction of the blowing needle (3), motors (20) with the same number as the blowing needles (3) are mounted on the fixed disk (4), the motors (20) respectively correspond to the blowing needles (3) one by one, a gear (21) is fixedly mounted on an output shaft of the motor (20), the gear (21) is meshed with the rack (19) on the blowing needle (3), and an encoder (22) is further arranged at the tail end of the motor (20); photoelectric liquid level sensors (23) with the same number of air blowing needles (3) are installed at the lower end of the fixed disc (4), and the photoelectric liquid level sensors (23) are located right above the test tubes in the clamping grooves (6).

10. The fixed nitrogen blowing instrument according to claim 9, wherein the housing of the water bath (1) is further provided with a PLC control box (24), the PLC is Siemens S7-1200 series PLC, and the motor (20), the encoder (22) and the photoelectric liquid level sensor (23) are electrically connected with the PLC.