CN210090156U - Blowing type nitrogen blowing instrument - Google Patents
Blowing type nitrogen blowing instrument Download PDFInfo
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- CN210090156U CN210090156U CN201920398037.2U CN201920398037U CN210090156U CN 210090156 U CN210090156 U CN 210090156U CN 201920398037 U CN201920398037 U CN 201920398037U CN 210090156 U CN210090156 U CN 210090156U
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- heating device
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- test tube
- water bath
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Abstract
The utility model discloses an air blowing type nitrogen blows appearance, including heating device, fixed bolster and a plurality of blowing needle, the heating device top is provided with a plurality of lofting grooves that are used for placing the test tube, heating device be provided with the cavity and with the air inlet of this cavity intercommunication, heating device's cavity forms two-layer structure, the one deck is used for placing water in order to carry out the water bath heating to the test tube bottom below, above-mentioned one deck lets in nitrogen gas through the air inlet and flows out inside in order to prevent that the vapor of water bath from entering into the test tube through the lofting groove. The utility model provides an air blowing type nitrogen blows the appearance improves on original water bath nitrogen blows the basis of appearance, is provided with the nitrogen layer of blowing above the water bath layer, has both avoided the water bath to introduce experimental error and has leaded to detection accuracy and sensitivity to reduce, can avoid again that dry-type heating direct contact test tube leads to being heated inequality and temperature uncontrollable's problem.
Description
Technical Field
The utility model relates to a nitrogen blows appearance technical field, especially relates to an air blowing type nitrogen blows appearance.
Background
The nitrogen blowing instrument is used for concentrating and preparing mass samples, and can be applied to the detection fields of medical industry, scientific experiments, pesticide residue and the like.
The nitrogen blower may be custom made, and is typically either single-or multi-hole. Every section nitrogen blows the heating device that the appearance all has the outfit, mainly divides two big types, and water bath nitrogen blows the appearance, and dry-type nitrogen blows the appearance, and the temperature can carry out freely adjusting, and its temperature fluctuation scope is also little.
However, the existing water bath nitrogen blowing instrument and the existing dry nitrogen blowing instrument have the following problems:
1. the dry heating nitrogen blowing instrument is difficult to control the temperature to be constant, is not suitable for a common glass tube or a common plastic tube, and is difficult to control when the nitrogen blowing of the organic reagent is carried out;
2. the water bath nitrogen blowing instrument generates a large amount of water vapor and is not suitable for nitrogen blowing of organic metal reagents
3. In the water bath heating process, the water bath nitrogen blowing instrument is easy to cause water drops condensed on the inner wall of the glass test tube, so that a sample is polluted, and for a laboratory which is used for pretreatment for a long time, the sample is higher in background and mixed with impurities, particularly, the sample which needs mass spectrum detection is higher in blank or larger in matrix effect.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide an air blowing type nitrogen blowing instrument, aiming at overcoming the defects of the water bath nitrogen blowing instrument and the dry type nitrogen blowing instrument.
In order to realize the above object, the utility model provides an appearance is blown to air blowing type nitrogen, including heating device, fixed bolster and a plurality of needle that blows, the heating device top is provided with a plurality of lofting grooves that are used for placing the test tube, heating device be provided with the cavity and with the air inlet of this cavity intercommunication, heating device's cavity forms two-layer structure, and following one deck is used for placing water in order to carry out water bath heating to the test tube bottom, and above-mentioned one deck lets in nitrogen gas through the air inlet and flows out inside in order to prevent that the vapor of water bath enters into the test tube through lofting groove.
Preferably, an air inlet pipe is fixed on the air inlet, and a pressure regulating valve is installed on the air inlet pipe.
Preferably, the distance between the air inlet and the bottom end face of the heating device is 70% -85% of the height of the heating device.
Preferably, the heating device is also provided with a water temperature controller for controlling water bath parameters.
Preferably, the diameter of the air inlet is 5-8 mm.
Preferably, the tops of a plurality of the blowing pins are communicated through a hose.
Preferably, a plurality of the blowing pins are detachably mounted on the fixing bracket.
Preferably, a plurality of flexible bumps are arranged on the inner side wall of the lofting groove at intervals and are in contact with the test tube to increase the friction force of the test tube.
Preferably, the inner side wall of the blowing needle is further coated with a polytetrafluoroethylene coating.
Preferably, the gas inlet is further provided with a gas filter for purifying nitrogen.
The utility model provides an air blowing type nitrogen blows the appearance improves on original water bath nitrogen blows the basis of appearance, is provided with the nitrogen layer of blowing above the water bath layer, has both avoided the water bath to introduce experimental error and has leaded to detection accuracy and sensitivity to reduce, can avoid again that dry-type heating direct contact test tube leads to being heated inequality and temperature uncontrollable's problem. The air blowing type nitrogen blowing instrument also has the advantages of simple structure, reliable work and low improvement cost.
Drawings
FIG. 1 is a schematic structural view of the blowing type nitrogen blowing instrument of the present invention;
fig. 2 is a schematic structural diagram of a heating device in the blowing type nitrogen blowing instrument of the present invention.
In the figure, 1-a heating device, 2-a fixed support, 3-a blowing needle, 4-an air inlet, 5-a lofting groove, 6-a water temperature controller and 7-a test tube.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 and 2, in the preferred embodiment, an air blowing type nitrogen blowing instrument comprises a heating device 1, a fixing support 2 and a plurality of blowing needles 3, wherein a plurality of lofting grooves 5 used for placing test tubes 7 are formed in the top of the heating device 1, the heating device 1 is provided with a cavity and air inlets 4 communicated with the cavity, the cavity of the heating device 1 forms a two-layer structure, the lower layer is used for placing water to heat the bottoms of the test tubes 7 in a water bath, and the upper layer is filled with nitrogen through the air inlets 4 and flows out through the lofting grooves 5 to prevent water vapor in the water bath from entering the interior of the test tubes 7.
The fixing bracket 2 is fixed on the top of the heating device 1. In this embodiment, an air inlet pipe is fixed on the air inlet 4, and a pressure regulating valve is installed on the air inlet pipe so as to adjust the pressure of the introduced nitrogen according to actual conditions.
Specifically, the distance between the air inlet 4 and the bottom end face of the heating device 1 is 70% -85% of the height of the heating device 1. The heating device 1 is also provided with a water temperature controller 6 for controlling water bath parameters (including water temperature, heating time and other parameters). The diameter of the air inlet 4 is 5-8 mm. The tops of the plurality of blowing pins 3 are communicated through a hose. A plurality of blow pins 3 are detachably mounted on the fixing bracket 2 so as to facilitate replacement of the blow pins 3.
Further, the interval is provided with a plurality of flexible bumps (not shown in the figure) and test tube 7 contact in order to increase its frictional force on the inside wall of lofting groove 5 to gaseous test tube 7 area run when preventing to let in nitrogen gas through air inlet 4.
Further, the inner side wall of the blowing needle 3 is coated with a polytetrafluoroethylene coating, so that organic reagents such as methanol and polycyclic aromatic hydrocarbon are prevented from being adsorbed, and the loss of a blown solvent and a substance to be detected is reduced. The gas inlet 4 is also equipped with a gas filter for purifying nitrogen gas in order to prevent impurities from being introduced when the purity of nitrogen gas is not reached.
The air blowing type nitrogen blowing instrument provided by the embodiment is improved on the basis of the original water bath nitrogen blowing instrument, the nitrogen blowing layer is arranged above the water bath layer, the water bath is prevented from introducing experimental errors, the detection accuracy and the sensitivity are reduced, and the problem that the dry heating direct contact test tube 7 is heated unevenly and the temperature is difficult to control is avoided. The air blowing type nitrogen blowing instrument also has the advantages of simple structure, reliable work and low improvement cost.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides an appearance is blown to air blowing type nitrogen, includes heating device, fixed bolster and a plurality of blowing needle, and the heating device top is provided with a plurality of lofting grooves that are used for placing the test tube, a serial communication port, heating device be provided with the cavity and with the air inlet of this cavity intercommunication, heating device's cavity forms two-layer structure, and following one deck is used for placing water and carries out the water bath heating in order to carry out the test tube bottom, and above-mentioned one deck lets in nitrogen gas through the air inlet and flows out inside in order to prevent that the vapor of water bath enters into the test tube through lofting groove.
2. The air blowing type nitrogen blowing instrument as claimed in claim 1, wherein an air inlet pipe is fixed on the air inlet, and a pressure regulating valve is installed on the air inlet pipe.
3. An air blowing type nitrogen blowing instrument as claimed in claim 1, wherein the distance between said air inlet and the bottom end face of the heating device is 70% to 85% of the height of the heating device.
4. The air blowing type nitrogen blowing instrument as claimed in claim 1, wherein a water temperature controller for controlling water bath parameters is further provided on the heating device.
5. An air blowing type nitrogen blowing instrument as claimed in claim 1, wherein the diameter of said air inlet is 5 to 8 mm.
6. The air blowing type nitrogen blowing instrument as claimed in claim 1, wherein the tops of a plurality of said blowing needles are communicated through a hose.
7. The inflatable nitrogen blowing apparatus of claim 1 wherein a plurality of said blowing pins are removably mounted on a fixed support.
8. The air blowing type nitrogen blowing instrument as claimed in claim 1, wherein a plurality of flexible bumps are arranged on the inner side wall of the lofting groove at intervals to be contacted with the test tube so as to increase the friction force of the test tube.
9. An air blowing type nitrogen blowing instrument as claimed in claim 1, wherein the inner side wall of said blowing needle is further coated with a polytetrafluoroethylene coating.
10. An air blowing type nitrogen blowing instrument as claimed in any one of claims 1 to 9, wherein said air inlet is further provided with a gas filter for purifying nitrogen gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920398037.2U CN210090156U (en) | 2019-03-25 | 2019-03-25 | Blowing type nitrogen blowing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920398037.2U CN210090156U (en) | 2019-03-25 | 2019-03-25 | Blowing type nitrogen blowing instrument |
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| Publication Number | Publication Date |
|---|---|
| CN210090156U true CN210090156U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920398037.2U Active CN210090156U (en) | 2019-03-25 | 2019-03-25 | Blowing type nitrogen blowing instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397171A (en) * | 2022-01-26 | 2022-04-26 | 石家庄市畜产品和兽药饲料质量检测中心 | Nitrogen blowing instrument for detecting veterinary drug residues in eggs |
-
2019
- 2019-03-25 CN CN201920398037.2U patent/CN210090156U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397171A (en) * | 2022-01-26 | 2022-04-26 | 石家庄市畜产品和兽药饲料质量检测中心 | Nitrogen blowing instrument for detecting veterinary drug residues in eggs |
| CN114397171B (en) * | 2022-01-26 | 2024-02-02 | 石家庄市畜产品和兽药饲料质量检测中心 | Detect remaining nitrogen of egg traditional chinese medicine animal remedy and blow appearance |
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