CN215115479U

CN215115479U - Adjustable nitrogen blowing instrument

Info

Publication number: CN215115479U
Application number: CN202120940791.1U
Authority: CN
Inventors: 张海燕; 王静静; 冯新忠; 华鹏
Original assignee: Korla Customs Of People's Republic Of China
Current assignee: Korla Customs Of People's Republic Of China
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-10
Anticipated expiration: 2031-04-30

Abstract

The utility model belongs to the technical field of the nitrogen blows the appearance, especially, relate to a nitrogen blows appearance with adjustable, including water bath and the sealed lid of setting in the water bath top, be equipped with the test-tube rack in the water bath, be equipped with a plurality of test-tube holes on the test-tube rack, the test-tube hole is used for placing the test tube, sealed lid is evenly arranged along its width direction and is equipped with many nitrogen gas pipes, evenly arrange along its axial on the nitrogen gas pipe and be equipped with many oblique blow needle pipes, oblique blow needle pipe with the test tube one-to-one, sealed covering is provided with the lid, it has detachable vertical-blow conversion equipment to blow the needle union coupling to one side. Through setting up the converting means that directly blows, make the nitrogen blow appearance realize the interconversion of oblique blowing mode and direct blowing mode, the nitrogen blows earlier stage and uses the oblique blowing mode to avoid the liquid level too high and the splash appears, and nitrogen blows later stage liquid level and reduces to change into the direct blowing mode and has improved the nitrogen gas utilization ratio, covers simultaneously in sealed covering and sets up the lid, conveniently changes the converting means that directly blows.

Description

Adjustable nitrogen blowing instrument

Technical Field

The utility model belongs to the technical field of the nitrogen blows the appearance, especially, relate to a nitrogen blows appearance with adjustable.

Background

Currently, in the field of pesticide residue detection, concentration of sample solutions is mainly achieved by two ways: the first method is to use a traditional rotary evaporator to concentrate, but only one sample can be processed at a time, and the concentration speed is slow, the operation is troublesome, and the method is not suitable for detecting multiple batches of samples. The second mode mainly adopts the nitrogen-blowing instrument concentrated, is applicable to the detection of many batches of samples, through blowing the nitrogen gas with the inertia to the surface of heating the sample, makes the evaporation rate of liquid accelerate and realize concentrated purpose, and when using the nitrogen-blowing instrument, the nitrogen gas stream can adopt straight formula or spiral blowing in the test tube.

Adopt the nitrogen of straight formula air current blowing to blow the appearance, move the blowing needle to the liquid level top, make the mode that blows needle perpendicular to liquid level but contactless liquid level blow, because during the straight blow, the blowing needle is nearer apart from the liquid level distance, so the flow that nitrogen gas needs is less, and concentration efficiency is higher, but cause liquid splash easily when concentrated solution liquid level is higher, and the straight formula nitrogen blows the appearance and is the open-type, when concentrated solution contains harmful substance, need put into the fume hood whole nitrogen blows appearance equipment, the operation is inconvenient.

The nitrogen blowing instrument adopting spiral air flow blowing has the advantages that the blowing needle and the central line of the test tube form a certain acute angle, so that nitrogen generates spiral downward air flow in the test tube, and the splashing of solution is avoided; and the nitrogen blows the appearance for sealed environment, and the inside air exit that is equipped with of nitrogen blows the appearance, and the harmful volatile substance of effective discharge has guaranteed operating personnel's safety, but along with the change of concentrated progress, the liquid level of sample solution descends, but blows needle position and angle fixed for nitrogen blows efficiency and very reduces, if keep same nitrogen and blow efficiency, needs to improve nitrogen flow, intangible a large amount of nitrogen gas of having wasted.

In addition, because the time consumed by the sample solution in each test tube to reach the concentration requirement is inconsistent, no matter whether straight type or spiral type air blowing is adopted, the air blowing needle needs to be moved away, the test tubes are taken out, whether the samples reach the concentration requirement or not is observed one by one, the over-blowing or under-blowing condition is easy to occur, and certain measurement errors are caused.

Chinese patent document CN211602654U discloses a stable form's nitrogen blows appearance relates to the technical field of nitrogen blows appearance, and it includes casing and lower casing, the internal test-tube rack that is equipped with of inferior valve, the below of test-tube rack is equipped with the water bath, the surface of test-tube rack is equipped with a plurality of test holes, the test hole interpolation is equipped with the test tube, be equipped with the needle pipe support on the last casing, there are many tracheas along its even array of width direction on the needle pipe support, there are many needles of blowing along its even array of axial on the trachea, blow the needle with the test tube meaning corresponds, including blowing the needle slope setting, blow the needle with the contained angle of test tube axis is 15 ~ 75. Above-mentioned scheme blows the needle and does not directly blow to the experimental liquid in the test tube, has reduced the possibility of the experimental liquid spill in the test tube, and then has improved the accuracy of experimental result. But above-mentioned technical scheme need shift out all blowing needles from the test tube when adjusting the blowing needle angle, influenced the nitrogen of other test tubes and blown the progress to be unfavorable for water bath heat preservation, above-mentioned scheme can only realize blowing to one side in addition, although angle control scope is great, nitrogen blow efficiency has been improved to a certain extent, nevertheless because space restriction, blowing needle length is limited, nitrogen blow the later stage blowing needle far away with the liquid level distance, influence nitrogen and blow efficiency, only increase nitrogen flow and just can guarantee concentrated efficiency, cause the waste of nitrogen gas.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main objective is through setting up and blowing the straight conversion equipment who is connected of needle pipe to one side, makes closed nitrogen blow the appearance realize the interconversion of blowing mode and straight mode to the liquid level is too high when having solved the nitrogen blow of straight blow formula nitrogen blow appearance and appears splashing easily and when blowing the nitrogen blow of straight blow formula nitrogen blow appearance the liquid level cross low problem that causes nitrogen gas consumption too much easily.

The utility model discloses the technical problem that will solve adopts following technical scheme to realize: the utility model provides a nitrogen blows appearance with adjustable, includes water bath and the sealed lid of setting in water bath top, be equipped with the test-tube rack in the water bath, be equipped with a plurality of test-tube holes on the test-tube rack, the test-tube hole is used for placing the test tube, sealed lid is evenly arranged along its width direction and is equipped with many nitrogen gas pipes, evenly arrange along its axial on the nitrogen gas pipe and be equipped with many oblique blow needle pipes, oblique blow needle pipe with test-tube hole one-to-one, sealed covering is provided with the lid, it has detachable conversion equipment that directly blows to one side to blow the needle union coupling. Through setting up and blowing straight conversion equipment that the needle union coupling blows to one side, realize the interconversion of the oblique mode of blowing and the straight mode of blowing, nitrogen blows earlier stage and uses the oblique mode of blowing to have avoided the liquid level too high splash to appear, nitrogen blows later stage liquid level decline or concentrated solution volume when less change into the straight mode of blowing, nitrogen gas demand is less under equal concentration efficiency, the nitrogen gas utilization ratio has been improved, set up the lid simultaneously on sealed covering, need not to blow needle tubing to one side and test tube separation and can change straight conversion equipment that blows, the simple operation, the nitrogen that does not influence other test tubes blows the progress, and solved because of the space undersize and the straight needle tubing longer can't be with the problem that the straight needle tubing inserted the test tube that blows when leading to closed sealed lid.

The technical proposal of the utility model is also that: the direct-blowing conversion device comprises a needle valve and a direct-blowing needle tube, the direct-blowing needle tube is connected with a needle valve air outlet through a first luer connector, and the oblique-blowing needle tube is connected with a needle valve air inlet through a second luer connector. Through the needle valve can realize that nitrogen blows the appearance mode of blowing and change into the straight blow mode by oblique blow mode, can adjust every straight blow needle tubing's nitrogen flow again alone, effective control nitrogen blows efficiency, guarantees the nitrogen quality of blowing, perhaps the break-make of the nitrogen gas of every straight blow needle tubing of individual control avoids appearing the air-blow phenomenon, saves nitrogen gas. In order to ensure the sealing performance of the pipeline, the specification of the luer connector is matched with the outer diameter of the straight blow needle tube and the outer diameter of the inclined blow needle tube, so that the connection and the sealing of pipelines with different diameters are met.

The technical proposal of the utility model is also that: the nitrogen pipe is rotatably arranged on the sealing cover through a bearing, and one end of the nitrogen pipe is provided with an angle adjusting device;

the angle adjusting device comprises a driving wheel, a transmission belt and a driven wheel, wherein the driven wheel is arranged at one end of the nitrogen pipe in a sleeved mode, the driving wheel is rotatably arranged on the sealing cover through a bearing, the driving wheel is connected with the driven wheel through the transmission belt, and the driving wheel is driven by a motor. The angle adjusting device can adjust the angle of the inclined blowing needle tube, improve the nitrogen blowing efficiency during inclined blowing, and facilitate the replacement of the straight blowing needle tube by adjusting the angle of the inclined blowing needle tube; in addition, the belt transmission arrangement is flexible, the requirement on space is low, and the integral layout is convenient.

The technical proposal of the utility model is also that: the nitrogen gas pipe is connected with the gas conveying pipeline through the two-way valve. The two-way valve can control the on-off of the nitrogen pipe and the total nitrogen flow, thereby adjusting the nitrogen flow of each inclined blowing needle pipe.

The technical proposal of the utility model is also that: the water bath kettle is characterized in that an observation window is arranged on the side wall of the water bath kettle, and a magnifying lens is arranged on the observation window. Can observe the nitrogen of solution in the water bath in real time through the observation window and blow the progress, guarantee that the nitrogen blows the requirement that the distance of needle tubing and liquid level satisfies nitrogen and blow, avoid blowing under or blowing excessively simultaneously, guarantee the nitrogen and blow the quality, can see the volume of the remaining solution in the test tube that is close the nitrogen blow terminal point more clearly through the magnifying glass, so that in time take out the test tube that weathers, and needn't open sealed lid and take out the test tube and observe one by one, nitrogen blowing efficiency and nitrogen blowing quality have been improved, harmful substance pair has reduced the harm to the human body in the nitrogen blows the solution simultaneously.

The technical proposal of the utility model is also that: the upper cover body is a transparent cover body. The angle of the inclined blowing needle tube can be observed through the transparent cover body, and adjustment and operation are facilitated.

The utility model has the advantages that: (1) the direct blowing conversion device connected with the inclined blowing needle pipe is arranged, so that the mutual conversion of an inclined blowing mode and a direct blowing mode of the closed nitrogen blowing instrument is realized, and the inclined blowing mode is used in the early stage of nitrogen blowing, so that the phenomenon that the liquid level is too high and splashing occurs is avoided; the direct blowing conversion device is replaced without separating the inclined blowing needle tube from the test tube by arranging the upper cover body on the sealing cover, the operation is convenient and fast, and the nitrogen blowing progress of other test tubes is not influenced; (2) by arranging the angle adjusting device, the angle of the inclined blowing needle tube can be adjusted, the nitrogen blowing efficiency during inclined blowing is improved, and meanwhile, the installation of the direct blowing conversion device is facilitated; (3) the needle valve can change an inclined blowing mode into a direct blowing mode, and can independently adjust the nitrogen flow of each direct-blowing needle tube, thereby ensuring the nitrogen blowing efficiency, or independently controlling the on-off of the nitrogen of each direct-blowing needle tube, avoiding the empty blowing phenomenon of the needle tubes and saving the nitrogen; (4) set up the observation window at the water bath lateral wall, the nitrogen that can observe solution in the test tube in real time blows the progress, avoids the needle tubing to influence nitrogen and blows efficiency apart from the liquid level too far, perhaps blows under to blow and leads to nitrogen to blow the effect not good.

Drawings

FIG. 1 is a schematic structural view of an adjustable nitrogen blowing apparatus according to the present invention;

fig. 2 is a schematic structural view of the angle adjusting device of the present invention;

FIG. 3 is a perspective view of the adjustable nitrogen blowing apparatus of the present invention;

in the figure, a water bath 1, a sealing cover 2, a test tube rack 3, a test tube hole 3-1, a test tube 4, a nitrogen tube 5, an inclined blowing needle tube 6, an upper cover 7, a needle valve 8, a straight blowing needle tube 9, a driving wheel 10, a transmission belt 11, a driven wheel 12, a motor 13, a two-way valve 14, an observation window 15, a first luer connector 16A and a second luer connector 16B are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-3, an appearance is blown to nitrogen with adjustable, including water bath 1 and the sealed lid 2 of setting in water bath 1 top, be equipped with test-tube rack 3 in the water bath 1, be equipped with 9 test tube holes 3-1 on the test-tube rack 3, test tube hole 3-1 is used for placing test tube 4, sealed lid 2 evenly arranges along its width direction and is equipped with 3 nitrogen gas pipes 5, evenly arrange along its axial on the nitrogen gas pipe 5 and be equipped with 3 needle pipes 6 that blow to one side, blow to one side needle pipe 6 with the position one-to-one in test tube hole 3-1, sealed lid 2 top articulates there is last lid 7, go up lid 7 and be transparent lid, go up the lid 7 material and adopt the PC material, it is connected with detachable straight conversion equipment to blow needle pipe 6 to one side. According to the evaporation speed and the boiling point of the concentrated solvent, the heating temperature of the water bath 1 is set, and the temperature is raised in a water bath heating mode to realize the rapid concentration of the concentrated solvent.

The direct-blowing conversion device comprises a needle valve 8 and a direct-blowing needle tube 9, the direct-blowing needle tube 9 is connected with an air outlet of the needle valve 8 through a first luer connector 16A, and the inclined-blowing needle tube 6 is connected with an air inlet of the needle valve 8 through a second luer connector 16B. The needle valve 8 is a right-angle needle valve. The needle valve 8 can change the inclined blowing mode of the nitrogen blowing instrument into the direct blowing mode, and can independently adjust the nitrogen flow of each direct-blowing needle tube 9, thereby effectively controlling the nitrogen blowing efficiency and ensuring the nitrogen blowing quality; after the nitrogen blowing is finished, the nitrogen of the corresponding direct-blowing needle tube 9 can be closed through the needle valve 8, so that the empty blowing is avoided, and the nitrogen is saved.

The nitrogen gas pipe 5 is rotatably arranged on the sealing cover 2 through a bearing, and one end of the nitrogen gas pipe 5 is provided with an angle adjusting device.

Angle adjusting device includes action wheel 10, driving belt 11 and cover and establishes from driving wheel 12 of 5 one ends of nitrogen gas pipe, follow

driving wheel

12 and 5 radial relatively fixed of nitrogen gas pipe, action wheel 10 passes through the rotatable setting of bearing on sealed lid 2, action wheel 10 with from driving wheel 12 and pass through driving belt 11 and connect, action wheel 10 passes through the drive of motor 13. The driving wheel 10 is driven to rotate by the motor 13, and the nitrogen tube 5 is driven to rotate by the driving belt 11, so that the angle of the inclined blowing needle tube 6 is adjusted.

The adjustable nitrogen blowing instrument is further provided with a gas conveying pipeline, and the nitrogen pipe 5 is connected with the gas conveying pipeline through the two-way valve 14. The total nitrogen flow of each nitrogen pipe 5 can be controlled through the two-way valve 14, so that the nitrogen flow of each inclined needle tube 6 on the nitrogen pipe 5 is adjusted.

An observation window 15 is arranged in front of the side wall of the water bath pot 1, and a magnifying glass is arranged on the observation window 15.

The utility model discloses a theory of operation: when the nitrogen blowing instrument starts to work, quantitative water is added into the water bath kettle 1, the water is heated to the required temperature, the test tube 4 filled with concentrated solution is placed in the test tube hole 3-1 and vertically placed in the water bath kettle 1, the nitrogen tube 5 required to be used is connected with the gas conveying pipeline by controlling the two-way valve 14, and the nitrogen flow of the nitrogen tube 5 is controlled by the opening degree of the two-way valve 14.

The blowing mode of the adjustable nitrogen blowing instrument is adjusted by the following modes:

(1) at the nitrogen blow when beginning, because the liquid level is higher in the test tube 4, adopt spiral blowing for preventing that solution from splashing, adopt to blow needle pipe 6 to one side promptly, blow needle pipe 6 to one side to 4 inner walls slopes of test tube, need not the installation at this moment and directly blow conversion equipment, only need blow the angle of needle pipe 6 to one side through angle adjusting device regulation in order to guarantee nitrogen and blow efficiency.

(2) When the liquid level gradually drops, the blowing mode is converted into straight blowing by installing the straight blowing conversion device under the condition of not increasing the nitrogen flow, so that the surface of the sample solution is still ensured to have proper air flow disturbance, and the blowing efficiency is improved.

As shown in fig. 1, the specific replacement steps of the blow-through conversion device are as follows: firstly, the straight blow needle tube 9 is sleeved into the first luer connector 16A, then the first luer connector 16A is connected with the needle valve 8, then the needle valve 8 is connected with the inclined blow needle tube 6 through the second luer connector 16B, the inclined blow mode of nitrogen can be changed into the straight blow mode, the nitrogen flow of each straight blow needle tube 9 can be adjusted through the needle valve 8, meanwhile, the installation of the straight blow needle tube 9 is facilitated by adjusting the angle of the inclined blow needle tube 6, in addition, the straight blow needle tubes 9 with different lengths are selected according to the difference of the liquid level height in the test tube 4, and the distance between the straight blow needle tube 9 and the liquid level is ensured to meet the nitrogen blow requirement.

When changing the straight blow needle tubing 9, only need open the last lid 7 of sealed lid 2 top can, do not influence the nitrogen of other test tubes 4 and blow the progress, the air exit of changing the in-process nitrogen and blowing the appearance lasts the exhaust, reduces harmful volatile substance to operating personnel's injury.

The inclined blowing mode and the direct blowing mode can be simultaneously realized in the same nitrogen blowing instrument, and the requirements of different concentrated samples and different sample nitrogen blowing schedules are met.

As shown in figure 3, the observation window 15 is arranged in front of the water bath kettle 1 with constant temperature, the observation window 15 has the function of amplification, so that an operator can more clearly see the volume of the residual solution in the test tube 4 close to the nitrogen blowing end point, the blow-dried test tube 4 can be taken out in time, the sealing cover 2 does not need to be opened, the test tube 4 is taken out again, the observation is carried out one by one, the time is saved, and the nitrogen blowing quality and the nitrogen blowing efficiency are ensured.

Claims

1. The utility model provides a nitrogen blows appearance with adjustable, includes water bath (1) and sets up sealed lid (2) in water bath (1) top, be equipped with test-tube rack (3) in water bath (1), be equipped with a plurality of test tube holes (3-1) on test-tube rack (3), test tube hole (3-1) are used for placing test tube (4), sealed lid (2) are evenly arranged along its width direction and are equipped with many nitrogen gas pipes (5), evenly arrange along its axial on nitrogen gas pipe (5) and be equipped with many needle tubes (6) of blowing to one side, needle tube (6) of blowing to one side with test tube hole (3-1) one-to-one, its characterized in that: an upper cover body (7) is arranged on the sealing cover (2), and the inclined blowing needle tube (6) is connected with a detachable direct blowing conversion device.

2. The adjustable nitrogen blowing apparatus according to claim 1, wherein: the direct-blowing conversion device comprises a needle valve (8) and a direct-blowing needle tube (9), the direct-blowing needle tube (9) is connected with the air outlet of the needle valve (8) through a first luer connector (16A), and the oblique-blowing needle tube (6) is connected with the air inlet of the needle valve (8) through a second luer connector (16B).

3. The adjustable nitrogen blowing apparatus according to claim 1, wherein: the nitrogen pipe (5) is rotatably arranged on the sealing cover (2) through a bearing, and one end of the nitrogen pipe (5) is provided with an angle adjusting device;

angle adjusting device includes action wheel (10), driving belt (11) and cover and establishes from driving wheel (12) in nitrogen gas pipe (5) one end, action wheel (10) pass through the rotatable setting of bearing on sealed lid (2), action wheel (10) and follow driving wheel (12) are connected through driving belt (11), action wheel (10) are through motor (13) drive.

4. The adjustable nitrogen blowing apparatus according to claim 1, wherein: the device also comprises a gas conveying pipeline, and the nitrogen gas pipe (5) is connected with the gas conveying pipeline through a two-way valve (14).

5. The adjustable nitrogen blowing instrument according to any one of claims 1 to 4, characterized in that: the side wall of the water bath kettle (1) is provided with an observation window (15), and the observation window (15) is provided with a magnifying glass.

6. The adjustable nitrogen blowing instrument according to any one of claims 1 to 4, characterized in that: the upper cover body (7) is a transparent cover body.