CN212119604U - Gas-liquid mixing device for preparing trace dissolved ternary mixed gas standard solution - Google Patents

Abstract

The embodiment of the utility model discloses a gas-liquid mixing device for preparing a trace dissolved ternary mixed gas standard solution, which comprises a mixing bin body and a liquid supply unit, wherein a stirring mechanism used for forming convection with gas sprayed by a ventilating coil arranged at the bottom in the mixing bin body is arranged in the mixing bin body; the liquid supply unit comprises a water inlet pipe, a stock solution inlet pipe and a marking solution outlet pipe which are arranged on the mixing bin body, the tail end of the stock solution inlet pipe, which is positioned in the mixing bin body, is connected with a water spraying coil pipe, a mass conservation flow ratio dynamic preparation method is adopted, the sufficient mixing is carried out by controlling the mass flow of each component gas and carrier gas, the trace dissolved ternary mixed gas standard solution can be quickly and accurately obtained, the influence of the gas temperature and the pressure volume is avoided, the preparation efficiency is high, the preparation precision of the standard solution is high, and the sustainable dynamic output is realized.

Description

Gas-liquid mixing device for preparing trace dissolved ternary mixed gas standard solution

Technical Field

The embodiment of the utility model provides a relate to ternary mixed gas standard solution preparation technical field, concretely relates to gas-liquid mixing device that trace dissolved ternary mixed gas standard solution was made.

Background

The standard mixed gas is prepared by taking a high-purity gas as a diluent gas and adding one or more other high-purity gases, and mainly comprises a weighing method, a partial pressure method, a volume method, a permeation method, a saturation method, an electrolysis method, an index dilution method and the like.

The preparation of the standard solution mostly adopts methods such as a volumetric method, a neutralization method, a redox method, a complex titration method, a method for manufacturing a system for preparing the quantitative trace water-soluble gas standard solution and the like. Wherein, standard gas preparation methods such as a weighing method, a partial pressure method, a volume method, a permeation method, a saturation method, an electrolysis method, an index dilution method and the like are only suitable for preparing constant value mixed standard gas;

the preparation methods of standard solutions such as a volumetric method, a neutralization method, a redox method, a complex titration method and the like are only suitable for preparing the standard solution taking non-gas as a main target;

the method for manufacturing the constant value trace water-soluble gas standard solution can manufacture the standard solution taking water-soluble gas as a main target according to a headspace balance gas chromatography testing principle, but can be realized by depending on a plurality of systems such as a pressure-resistant stock solution barrel, a constant gas standard solution preparation device, a gas chromatography unit and the like, and belongs to a static manufacturing method from the aspect of dynamics, the quantity of the standard solution manufactured each time is limited, and continuous output cannot be provided;

the existing methods can not meet the requirement of dynamic manufacturing of the standard solution of trace dissolved ternary mixed gas.

The method for manufacturing the standard solution of the trace water-soluble gas with the fixed value can manufacture the standard solution taking the water-soluble gas as a main target, but the standard solution can be manufactured by depending on a pressure-resistant stock solution barrel, a fixed gas standard solution preparation device, a gas chromatography unit and other devices, and the quantity of the standard solution manufactured each time is limited, so that the standard solution cannot be continuously output. At present, a manufacturing method specially aiming at the dynamics of a related trace dissolved ternary mixed gas standard solution is still blank.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a gas-liquid mixing device that trace dissolved ternary mixed gas standard solution was made has solved the problem that current method can not satisfy the demand that trace dissolved ternary mixed gas standard solution developments were made.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

a gas-liquid mixing device for manufacturing a trace dissolved ternary mixed gas standard solution is characterized by comprising a mixing bin body and a liquid supply unit, wherein the mixing bin body is used for receiving a standard gas formed by mixing component gas and carrier gas, the liquid supply unit is used for providing a stock solution, a stirring mechanism used for forming convection with the gas sprayed by a ventilation coil arranged at the bottom in the mixing bin body is arranged in the mixing bin body, a magnetic heating stirring mechanism is arranged in the mixing bin body at the bottom of the ventilation coil, and a stirrer driven to rotate by the magnetic heating stirring mechanism is arranged at the bottom in the mixing bin body;

the liquid supply unit comprises a water inlet pipe, a stock solution inlet pipe and a marking solution outlet pipe which are arranged on the mixing bin body, and the tail end of the stock solution inlet pipe, which is positioned in the mixing bin body, is connected with a water spraying coil pipe.

As a preferred scheme of the utility model, rabbling mechanism includes central pivot to and equidistant installation is at the epaxial mixed blade of central pivot, mixed blade include with the retainer plate of mixed storehouse internal wall contact, and the paddle of spiral array between central pivot and retainer plate, the paddle is including the interior paddle that is used for forming the downwelling and the outer paddle that is used for forming upflow and radial distance to be less than interior paddle, be provided with the water conservancy diversion piece of the flow direction of maintaining upflow or downflow between outer paddle and the interior paddle.

As a preferred scheme of the utility model, interior paddle and outer paddle are along the radial connection of retainer plate on same radiation pole, just the both ends of radiation pole are connected respectively on central pivot and retainer plate, and the spiral opposite direction of interior paddle and outer paddle.

As an optimized scheme of the utility model, the coil pipe of ventilating is located the upper portion of stirring to from the bottom of the mixing storehouse body blowout mist that makes progress, stoste advances the pipe and is located the lateral wall at mixing storehouse body top.

As an optimized proposal of the utility model, a heat preservation water jacket is arranged in the mixing bin inner wall, and the medium in the heat preservation water jacket is heated by a magnetic heating stirring mechanism.

As an optimized scheme of the utility model, the top of mixing the storehouse body is provided with the relief valve, the inside interior pressure sensor that is used for monitoring mixed storehouse internal top atmospheric pressure that is provided with of relief valve.

The utility model discloses an embodiment has following advantage:

the utility model discloses a method is joined in marriage to conservative flow ratio developments of quality, through the mass flow of controlling each component gas and carrier gas, carry out abundant mixing according to specific method, can be fast and the high accuracy obtain the trace and dissolve ternary mixed gas standard solution, do not receive the influence of gas temperature and pressure volume, do not produce any waste gas or waste liquid harmful to the environment, prepare efficient, the precision is high and sustainable dynamic output, safety, stability, green, environmental protection, device are simple and easy, easy and simple to handle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

FIG. 1 is a block diagram of a system for producing a trace dissolved ternary mixed gas standard solution according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a fixed-ratio gas delivery unit according to an embodiment of the present invention;

FIG. 3 is a schematic view of a blade configuration according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a turbofan gas mixing mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic view of a quick connector structure according to an embodiment of the present invention;

FIG. 6 is a schematic view of a gas-liquid mixer according to an embodiment of the present invention.

In the figure:

1-a first branch pipe; 2-a second branch pipe; 3-a vacuum system; 4-a pressure sensor; 5-a mass flow controller; 6-total branch pipeline; 7-turbofan gas mixing mechanism; 8-aeration coil pipe; 9-a spiral pipe; 10-a quick coupling; 11-a straight tube body; 12-an internal pressure sensor; 13-a wire mesh separator; 14-a pressure relief valve; 15-a one-way valve; 16-a mixing bin body; 17-a water inlet pipe; 18-raw liquid inlet pipe; 19-a marker liquid outlet pipe; 20-water spraying coil pipe; 21-a central rotating shaft; 22-magnetic heating stirring mechanism; 23-a stirrer; 24-heat preservation water jacket; 25-a stationary ring; 26-a blade; 27-inner blade; 28-outer blades; 29-flow deflectors; 30-a radiation rod;

101-a bidirectional pipe body; 102-a threaded segment; 103-threaded sleeve; 104-reducing layer sleeve; 105-an equal diameter tube; 106-projection; 107-annular groove; 108-embedded ring grooves; 109-annular latch tongue; 110-inner seal ring;

701-an upper chamber; 702-a lower chamber; 703-turbofan.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The invention provides a manufacturing system of a trace dissolved ternary mixed gas standard solution, which comprises

The fixed proportion gas conveying unit is used for providing component gas and carrier gas in preset proportion;

the gas mixing unit is used for mixing the component gas and the carrier gas supplied by the fixed-proportion gas conveying unit to obtain intermediate gas;

the liquid supply unit is used for providing high-purity cleaning water and spraying stock solution;

and the gas-liquid mixer is used for calibrating the volume and the gas pressure of the intermediate gas in a constant-temperature sealed environment to obtain target gas, calibrating the volume of stock solution in a constant-temperature sealed environment to obtain target liquid, continuously stirring and mixing the target gas and the target liquid to obtain standard solution, and dynamically discharging the standard solution.

The invention takes Henry's law and mass conservation law as the main principle basis, takes the certified standard gas and stock solution manufacturing device, refers to the stock solution manufactured by a stock solution processing device with the patent number of ZL 201822144779.0 as the raw material, adopts a mass conservation flow ratio dynamic preparation method aiming at the ternary mixed gas standard solution with enough dilute target gas concentration, obtains the trace dissolved ternary mixed gas standard solution by controlling the mass flow of each component gas and carrier gas and fully mixing the components according to a specific method, is not influenced by temperature and pressure conditions, does not generate any waste gas or waste liquid harmful to the environment, has high preparation efficiency, high precision, continuous dynamic output, safety, stability, green, environmental protection, simple device and convenient operation.

As shown in fig. 1 to 6, the present invention provides a gas control system for the above component gas and carrier gas, comprising a proportional gas delivery unit and a gas mixing unit, comprising a plurality of first branch pipes 1 for component gas delivery and a second branch pipe 2 for carrier gas delivery, and a vacuum system 3 for realizing near vacuum state of the first branch pipes 1, the second branch pipes 2, the gas mixing unit and the mixer.

The pipelines of the first branch pipe 1 and the second branch pipe 2 and the vacuum system 3 are respectively provided with a pressure sensor 4 and a mass flow controller 5, the pressure, the flow and the mass of the gas in the conveying pipeline are detected in real time, the flow and the mass in the conveying pipeline are adjusted in real time through the mass flow controller 5,

the present invention further provides a through valve at both ends of the first branch pipe 1 and the second branch pipe 2 at the mass flow controller 5, which functions to close the conveying state in the conveying pipe and to start the vacuum system 3 by closing the through valve, facilitating the completion of the near vacuum state in the conveying pipe.

The component gas supply means of the first branch pipe 1 may be a gas supply cylinder and the carrier gas supply means of the second branch pipe 2 may be a gas carrier cylinder.

The invention further provides a preliminary mixing device for mixing the carrier gas and the component gas, namely a gas mixing unit, which specifically comprises the gas mixing unit, wherein the gas mixing unit comprises a main branch pipeline 6 connected with a vacuum system 3 and a mixer and a turbofan 703 gas mixing mechanism 7 arranged on the main branch pipeline 6, the turbofan 703 gas mixing mechanism 7 is connected with a proportional gas conveying unit and receives the component gas and the carrier gas, and the tail end of the main branch pipeline 6 extending into the mixer is provided with a ventilation coil 8 for spraying the mixed gas of the component gas and the carrier gas;

the mixed gas flow delivered by the fixed-proportion gas delivery unit is changed by the turbofan 703 gas mixing mechanism 7, and the flow rate of the mixed gas delivered to the mixer from the main branch pipeline 6 is controlled by the turbofan 703 gas mixing mechanism 7.

The main branch pipeline 6 positioned in the mixed gas is provided with a spiral pipe 9, and the main branch pipeline 6 positioned between the spiral pipe 9 and the turbofan 703 gas mixing mechanism 7 is connected through a quick joint 10.

The turbofan 703 gas mixing mechanism 7 comprises an upper chamber 701 for connecting the first branch pipe 1 and a lower chamber 702 for connecting the second branch pipe 2 and for mixing the carrier gas and the component gas, wherein the upper chamber 701 and the lower chamber 702 are internally provided with a turbofan 703 coaxially rotating, and the interiors of the upper chamber 701 and the lower chamber 702 are in a communicated state;

further, the turbofan 703 in the upper chamber 701 and the lower chamber 702 may rotate coaxially or may rotate by two rotating shafts, respectively.

The vacuum system 3 is connected by piping to the connection of the second branch pipe 2 to the lower chamber 702.

During operation, the component gas flows into the turbofan 703 gas mixing mechanism 7 through the first branch pipe 1, is mixed with the carrier gas entering the lower chamber 702 through the second branch pipe 2 after being primarily mixed in the upper chamber 701, and finally is sent to the spiral pipe 9 through the main branch pipe, and finally is ejected by the ventilating coil 8.

The straight pipe main body 11 of the target gas mixed by the gas-liquid mixer and discharged through a relief valve 14 provided in the gas-liquid mixer is connected to the lower chamber 702.

The straight pipe body 11 is provided therein with a wire mesh separator 13 for gas-liquid separation, and the straight pipe body 11 is provided with a check valve 15.

The pressure relief valve 14 is provided with an internal pressure sensor 12 for monitoring the top gas pressure in the gas-liquid mixer, and an electric signal of the top gas pressure in the gas-liquid mixer acquired by the internal pressure sensor 12 is used as a driving signal for the operation of the check valve 15.

When the air pressure of target gas in a gas-liquid mixer in a constant-temperature closed environment reaches a preset pressure value, stopping introducing intermediate gas, and simultaneously adding a pre-prepared stock solution into the constant-temperature gas-liquid mixer until the target gas is completely discharged out of the gas-liquid mixer;

after the liquid pressure in the gas-liquid mixer is stabilized, the stock solution is kept continuously introduced to obtain the standard solution, the standard solution is continuously and dynamically output, and when the standard solution is continuously output, the gas which is not completely dissolved with the stock solution overflows the surface of the stock solution under the influence of the flow of a standard solution outlet pipe which dynamically outputs the standard solution, and then is accumulated at the inner top of the gas-liquid mixer, when the pressure value of the target gas at the inner top of the gas-liquid mixer reaches the set value of a pressure release valve 14, an internal pressure sensor 12 transmits an electric signal, a check valve 15 on a straight pipe main body 11 is opened, so that the target gas at the inner top of the gas-liquid mixer enters a lower-layer chamber 702, and the target gas is circularly dissolved again.

Meanwhile, in order not to influence the standard solution entering the lower chamber 702 and further influence the proportion of the component gas and the carrier gas of the fixed proportion gas conveying unit, a wire mesh separator 13 for gas-liquid separation is arranged in the straight pipe main body 11, and the condition that the mixed gas of the component gas and the carrier gas in the lower chamber 702 reversely enters the gas-liquid mixer through a one-way valve 15 and further influences the calibration of the standard solution is avoided.

The invention further provides a gas-liquid mixing device for mixing the gas and the stock solution after the carrier gas and the component gas are mixed, namely a gas-liquid mixer, which specifically comprises a mixing bin body 16, wherein a gas proportion conveying mechanism is connected with the mixing bin body 16 through a general branch pipeline 6, the mixing bin body 15 is provided with a stirring mechanism which is used for forming convection with the gas sprayed out by the ventilating coil pipe 9 in the mixing bin body 16, the bottom of the mixing bin body 16 is provided with a magnetic heating stirring mechanism 22, and the bottom in the mixing bin body 16 is provided with a stirrer 23 which is driven to rotate by the magnetic heating stirring mechanism 22;

the liquid supply unit comprises a water inlet pipe 17, a stock solution inlet pipe 18 and a marking solution outlet pipe 19 which are arranged on the mixing bin body 16, and the tail end of the stock solution inlet pipe 18 positioned inside the mixing bin body 16 is connected with a water spraying coil pipe 20.

The stirring mechanism comprises a central rotating shaft 21 and mixing blades which are arranged on the central rotating shaft 21 at equal intervals, each mixing blade comprises a fixed ring 25 which is in contact with the inner wall of the mixing cabin 16, and blades 26 which are spirally arrayed between the central rotating shaft 21 and the fixed ring 25, each blade 26 comprises an inner blade 27 which is used for forming descending flow and an outer blade 28 which is used for forming ascending flow and has a radial distance smaller than that of the inner blade 27, and a flow deflector 29 which is used for maintaining the flow direction of the ascending flow or the descending flow is arranged between the outer blade 28 and the inner blade 27.

The inner paddle 27 and the outer paddle 28 are connected to the same radiation rod 30 along the radial direction of the fixing ring, two ends of the radiation rod 30 are connected to the central rotating shaft 21 and the fixing ring 25 respectively, and the spiral directions of the inner paddle 27 and the outer paddle 28 are opposite.

The invention has two working states that are provided,

firstly, the central rotating shaft 21 can be driven to rotate by an external driving mechanism, such as an electric motor or a motor;

secondly, the air pipe 8 sprays directional gas into the mixing cabin 16 to form directional vortex flow for the liquid in the mixing cabin, or sprays directional water flow into the mixing cabin 16 through the water inlet pipe to form directional vortex flow, at this moment, the central rotating shaft 1 is fixedly installed on the mixing cabin 16, and the blades 3 are installed on the central rotating shaft through bearings.

And each blade of the paddle is provided with a strip-shaped through groove for guiding the water body.

The blades in any working state can realize that the water flow in the mixing bin body 16 forms a circulating water flow in the form of a magnetic field, for example, and the specific forming mode of the circulating water flow is as follows:

the water forms the rivers post under the rotation direction of paddle including and is just contacting with the air feed pipe who is located mixing storehouse body 16 bottom, because air feed pipe spun gas has certain play speed, and then can increase contact surface between them as far as, and under the water conservancy diversion effect of water conservancy diversion piece, the water circulation that forms interior paddle and outer paddle is separated, and the water circulation that forms interior paddle and outer paddle is from up circulating down, the contact route of gas and liquid has been increased, can make the gas-liquid intensive mixing.

The inner paddle and the outer paddle are connected to the same radiation rod along the radial direction of the fixing ring, two ends of the radiation rod are connected to the central rotating shaft and the fixing ring respectively, and the spiral directions of the inner paddle and the outer paddle are opposite.

Interior paddle and outer paddle have 2 ~ 3 cm's difference in height in the axial, and interior paddle and outer paddle reduce along the radial width of retainer plate gradually, there is the angle difference of 10 ~ 30 between interior paddle and the outer paddle, the velocity of flow of inside and outside rivers is different, interior paddle is because the paddle width will be greater than the width of outer paddle, just also make the rivers circulating speed that interior paddle formed slow with the velocity of flow that outer paddle formed, then make the velocity of flow that interior paddle formed and ventilating coil's spun gas contact time long.

Further, the ventilating coil 8 is specifically an annular pipe with uniformly distributed air holes.

The guide vane 29 is located between two adjacent inner blades 27, and two ends of the guide vane 29 are respectively connected to two adjacent radiation rods.

The tail end of the outer paddle is not completely connected with the inner wall of the fixing ring, and the cross section of the fixing ring is in the shape of an inverted normal distribution curve.

Further, the utility model discloses still provide the stirring rake that utilizes this mixing blade, include and install this mixing blade equidistant in central pivot, the bottom of central pivot is provided with the support frame that a plurality of inlayed the dress on the 16 diapalls in the mixing storehouse body.

The ventilating coil 8 is positioned at the upper part of the stirrer 23 and sprays mixed gas upwards from the bottom of the mixing cabin 16, and the stock solution inlet pipe 18 is positioned on the side wall of the top of the mixing cabin 16.

Be provided with heat preservation water jacket 24 in the mixing storehouse body 16 inner wall, and the medium in the heat preservation water jacket 24 heats through magnetic force heating rabbling mechanism 22, and the stirring of magnetic force heating rabbling mechanism drive mixing storehouse body 16 is interior 23 motions, plays the stirring effect to gas to provide a homothermal mixed environment for mixing storehouse body 16 in through heat preservation water jacket 24.

Further, the invention provides a quick coupling, which specifically comprises a bidirectional pipe body 101 and two threaded sleeves 103 which are spirally connected to the bidirectional pipe body 101 through a threaded section 102; wherein the threaded sleeve 103 is movably sleeved on the bidirectional pipe body 101, a hose for connecting a container tank in the process of manufacturing the constant value ternary mixed standard gas is sleeved at two ends of the bidirectional pipe body 101, the threaded sleeve 103 is rotated, so that the hose is sleeved between the threaded sleeve 103 and the bidirectional pipe body 101, the hose is pressed through the threaded sleeve 103, and the hose is unlocked by reversely rotating the threaded sleeve 103.

The joint department of traditional quick-operation joint 10 all is the direct anti-skidding arch 106 that sets up the layer cover, the direct suit of hose is on anti-skidding arch 106, carry out the high-speed joint of pipeline, and this kind of side of connection is unable to be suitable for under the especially higher condition of gaseous or liquid precision requirement in the laboratory, when intraductal atmospheric pressure or hydraulic pressure are the change, the junction of hose and quick-operation joint 10 produces inflation or shrink easily, and then make gaseous leakage or inhale the outside air, and then influence the result of experiment.

In the invention, the two ends of the bidirectional pipe body 101 are provided with the reducing layer sleeves 104, the tail ends of the reducing layer sleeves 104 are provided with the equal-diameter pipes 105, the equal-diameter pipes 105 are used for increasing the surfaces which are in parallel contact with the inner wall of the hose, and when the hose is sleeved with the equal-diameter pipes 105, no matter how the air pressure in the hose changes, the hose cannot expand and leak at the connecting part.

The constant diameter pipe 105 is provided with an annular groove 107 matched with a bulge 106 arranged inside the threaded sleeve 103, the joint of the reducing layer sleeve 104 and the bidirectional pipe body 101 is provided with a self-sealing structure, the self-sealing structure comprises an embedded ring groove 108 arranged on the bidirectional pipe body 101 and an annular pin tongue 109 arranged inside the threaded sleeve 103, and an inner sealing ring 110 is arranged in the embedded ring groove 108.

The invention also forms a sealing space to form a sealing chamber with stable pressure when the main branch pipeline 6 is sleeved with the reducing layer sleeve 104 by combining the threaded sleeve 103 and the reducing layer sleeve 104, can ensure the connection stability of the main branch pipeline 6 when the pressure in the hose is overlarge or overlook, and can not generate the air leakage condition.

An outer sealing ring is arranged on the bidirectional pipe body 101 positioned on the outer side of the embedded ring groove 108, the contact surface of the embedded ring groove 108 and the annular pin tongue 109 is an inclined surface, the inclination angle of the inclined surface is 10-20 degrees, and the axial length of the annular pin tongue 109 is 1-2 mm shorter than that of the embedded ring groove 108.

The threaded sleeve 103 comprises a straight pipe section and a circular truncated cone section inside, and the circular truncated cone section axially extends to the root of the annular pin tongue 109.

The diameter of each layer of the reducing layer sleeve 104 is gradually increased until the diameter is the same as that of the equal diameter pipe 105.

The bulge 106 comprises two adjacent semicircular bulge rings, a certain gap exists between the two bulge rings, the height of the bulge ring positioned on the inner side is higher than that of the bulge ring positioned on the outer side, the function of the bulge ring is that in the long-time sleeving process, a hose is clamped in the annular groove 107, the bulge ring on the outer side buckles the hose into the annular groove 107, and the deformed part of the hose is pressed and held on the surface of the equal-diameter pipe 105 by the bulge ring on the inner side, so that sealing is realized;

and be applicable to the hose that the pipe diameter has 2 ~ 3mm disparity, when cup jointing, the pipe diameter is thinner then with inboard protruding circle with the pipe wall of hose impressed annular groove 107, outside protruding circle with the hose lie in the annular groove 107 outside the part pressure hold on the equal diameter pipe 105 surface.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (6)

1. The gas-liquid mixing device for manufacturing the trace dissolved ternary mixed gas standard solution is characterized by comprising a mixing cabin body (16) for receiving standard gas formed by mixing component gas and carrier gas and a liquid supply unit for providing stock solution, wherein a stirring mechanism for forming convection with gas sprayed out of a vent coil (8) arranged at the bottom in the mixing cabin body (16) is arranged in the mixing cabin body (16), a magnetic heating stirring mechanism (22) is arranged in the mixing cabin body (16) at the bottom of the vent coil (8), and a stirrer (23) driven to rotate by the magnetic heating stirring mechanism (22) is arranged at the bottom in the mixing cabin body (16);

the liquid supply unit comprises a water inlet pipe (17), a stock solution inlet pipe (18) and a marking solution outlet pipe (19) which are arranged on the mixing bin body (16), and the tail end of the stock solution inlet pipe (18) which is positioned inside the mixing bin body (16) is connected with a water spraying coil pipe (20).

2. The gas-liquid mixing device manufactured by the trace dissolved ternary mixed gas standard solution is characterized in that the stirring mechanism comprises a central rotating shaft (21) and mixing blades which are installed on the central rotating shaft (21) at equal intervals, each mixing blade comprises a fixed ring (25) which is in contact with the inner wall of the mixing cabin body (16), and blades (26) which are spirally arrayed between the central rotating shaft (21) and the fixed rings (25), each blade (26) comprises an inner blade (27) used for forming a descending flow and an outer blade (28) used for forming an ascending flow and have a radial distance smaller than that of the inner blade (27), and a flow guide sheet (29) used for maintaining the flow direction of the ascending flow or the descending flow is arranged between the outer blade (28) and the inner blade (27).

3. The gas-liquid mixing device manufactured by using the trace dissolved ternary mixed gas standard solution as claimed in claim 2, wherein the inner paddle (27) and the outer paddle (28) are connected to the same radiation rod (30) along the radial direction of the fixed ring, two ends of the radiation rod (30) are respectively connected to the central rotating shaft (21) and the fixed ring (25), and the spiral directions of the inner paddle (27) and the outer paddle (28) are opposite.

4. The gas-liquid mixing device made of the trace dissolved ternary mixed gas standard solution as claimed in claim 1, wherein the ventilating coil (8) is located at the upper part of the stirrer (23) and sprays the mixed gas upwards from the bottom of the mixing cabin (16), and the stock solution inlet pipe (18) is located on the side wall of the top of the mixing cabin (16).

5. The gas-liquid mixing device manufactured by using the trace dissolved ternary mixed gas standard solution as claimed in claim 1, wherein a heat-preservation water jacket (24) is arranged in the inner wall of the mixing bin body (16), and a medium in the heat-preservation water jacket (24) is heated by a magnetic heating stirring mechanism (22).

6. The gas-liquid mixing device manufactured by using the trace dissolved ternary mixed gas standard solution as claimed in claim 1, wherein a pressure relief valve (14) is arranged at the top of the mixing bin body (16), and an internal pressure sensor (12) for monitoring the top gas pressure in the mixing bin body (16) is arranged inside the pressure relief valve (14).

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