CN105605565A - Method for adjusting optimal angle of radial swirl blades in swirl burner - Google Patents
Method for adjusting optimal angle of radial swirl blades in swirl burner Download PDFInfo
- Publication number
- CN105605565A CN105605565A CN201610031232.2A CN201610031232A CN105605565A CN 105605565 A CN105605565 A CN 105605565A CN 201610031232 A CN201610031232 A CN 201610031232A CN 105605565 A CN105605565 A CN 105605565A
- Authority
- CN
- China
- Prior art keywords
- radial vortex
- vortex blade
- blade
- radial
- angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
The invention provides a method for adjusting the optimal angle of radial swirl blades in a swirl burner. The method comprises the steps that 1, the optimal angle of the radial swirl blades is calculated, and is an angle of the radial swirl blades when swirling intensity of a nozzle flow field of the burner is a maximum value; 2, the optimal vertical distance corresponding to the optimal angle is calculated and is the vertical distance from the fixing end of the other radial swirl blade adjacent to the radial swirl blade to the radial swirl blade when the radial swirl blade is located at the optimal angle; 3, the radial swirl blades are adjusted to enable the vertical distance from the fixing end of the other radial swirl blade to the radial swirl blade to be the optimal vertical distance. The optimal angle of the radial swirl blades can be determined fast and accurately; meanwhile, a simple distance testing tool can be used for locating the radial swirl blades accurately and is particularly suitable for site measurement and adjustment.
Description
Technical field
The present invention relates to a kind of method of adjustment of radial vortex blade, particularly radial vortex leaf in a kind of turbulent burnerThe method of adjustment of sheet best angle.
Background technology
Turbulent burner is a kind of combustion apparatus being widely used in Industrial Boiler, and turbulent burner is all by as Fig. 1Shown guiding device 10 is realized eddy flow. Turbulent burner comprise airduct 21, inner second air road 22 and withOuter second air road 23 that guiding device 10 is communicated with, wherein, the angle of radial vortex blade 2 is both for controlling circulationAir force, simultaneously also for regulating the tangential component size of inlet velocity, said two devices has determined burner spray jointlyThe size of mouth flow field swirl strength. The swirl strength in burner nozzle flow field is the important finger that affects turbulent burner performanceMark, it has determined the entrainment ability of burner nozzle to high-temperature flue gas in burner hearth, for maintaining the stable, lasting of burningAll significant with efficient grade. But, the current instrument only with the angle that can measure radial vortex blade 2,And do not there is the method that can instruct radial vortex blade 2 to be positioned to best angle, make burner nozzle flow field eddy flow strongDegree reaches suitable intensity.
Summary of the invention
Cannot instruct radial vortex blade to be positioned to the problem of best angle for above-mentioned prior art, the present invention proposesA method of adjustment for radial vortex blade best angle, the location, scene that can realize radial vortex blade, makes burningDevice spout flow field swirl strength reaches suitable intensity.
The technical solution adopted for the present invention to solve the technical problems is: in a kind of turbulent burner, radially swirl vane isThe method of adjustment of good angle, described turbulent burner contains guiding device, and guiding device contains multiple radial vortex blades,Radial vortex blade comprises stiff end and movable end; Described method of adjustment comprises the following steps:
Step 1, calculates the best angle of radial vortex blade, and described best angle is the spout stream when this burnerThe angle of radial vortex blade when the swirl strength of field is maximum;
Step 2, calculates the best vertical range that described best angle is corresponding, and described best vertical range is for working as oneWhen radial vortex blade is positioned at described best angle, radially revolve with adjacent another of a described radial vortex bladeThe stiff end of stream blade is to the vertical range of a described radial vortex blade;
Step 3, adjusts radial vortex blade, makes the stiff end of described another radial vortex blade to a described footpathBe described best vertical range to the vertical range of swirl vane.
Guiding device also comprises the first dividing plate and the second partition of annular, and the first dividing plate and second partition are parallel to each other,Multiple radial vortex blades between the first dividing plate and second partition along being circumferentially evenly spaced of the first dividing plate, radiallySwirl vane is rectangle, and the size and shape of each radial vortex blade is all identical, and radial vortex blade is perpendicular to firstDividing plate.
Each radial vortex blade all can rotate taking the stiff end of described radial vortex blade as axle, described stiff end positionIn the edge of the first dividing plate, described movable end, between the edge of the first dividing plate and the center of the first dividing plate, radially revolvesThe pivot center of stream blade is parallel with the axis of the first dividing plate.
Distance between the stiff end of two adjacent radial vortex blades equals a radial vortex blade stiff end and arrivesDistance between the movable end of described radial vortex blade, the movable end of radial vortex blade can turn to and described footpathTo the stiff end place of the adjacent radial vortex blade of swirl vane.
In step 1, the computing formula of described swirl strength is:
In described computing formula, the spout flow field swirl strength that I is this burner, without unit; α is radial vortexThe angle of blade, the angle of described radial vortex blade is a radial vortex leaf in adjacent two radial vortex bladesThe angle of joint face between the stiff end of sheet and described two adjacent radial vortex blades, unit is °;For adjacentThe stiff end of two radial vortex blades between the corresponding central angle in space, unit is °.
In the time of α=0 °, described radial vortex blade is in contract fully position; WhenTime, describedly radially revolveStream blade is in full open position.
In step 2, the movable end of a described radial vortex blade is towards inclining with described another radial vortex bladeTiltedly;
The computing formula of described best vertical range is
In described computing formula, h*For best vertical range, unit is mm; R is consolidating of described radial vortex bladeThe place radius of a circle of fixed end, unit is mm; α*For described best angle, unit is °.
In step 3, in the time adjusting described best vertical range, use set square as survey tool.
Step 3 comprises the following steps:
Step 3.1, makes a right-angle side of described set square be connected to the fixing of described another radial vortex bladeEnd, makes another right-angle side of described set square align with a described radial vortex blade;
Step 3.2, rotates a described radial vortex blade, and the stiff end of described another radial vortex blade is arrivedThe vertical range of a described radial vortex blade equals described best vertical range.
Described method of adjustment is further comprising the steps of:
Step 4, according to step 3, adjusts each radial vortex blade, until adjusted radially allSwirl vane.
The invention has the beneficial effects as follows, can determine quickly and accurately the best angle of radial vortex blade, meanwhile,Can also replace special angular surveying instrument with for example square of simple distance test instrument, accurately realize footpathTo the location of swirl vane, be specially adapted to on-the-spot measurement and adjustment.
Brief description of the drawings
Fig. 1 is the structural representation of guiding device;
Fig. 2 is the distribution schematic diagram of radial vortex blade;
Fig. 3 is flow chart of the present invention.
Description of reference numerals:
11, the first dividing plate, 12, second partition, 2, radial vortex blade, 3, stiff end, 4, movable end, 10,Guiding device, 21, an airduct, 22, inner second air road, 23, outer second air road.
Detailed description of the invention
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast brief description of the drawings thisBright detailed description of the invention.
The invention provides in a kind of turbulent burner the radially method of adjustment of swirl vane best angle, if Fig. 1 is to figureShown in 3, described turbulent burner contains guiding device 10, and guiding device 10 contains multiple radial vortex blades 2,Radial vortex blade 2 comprises stiff end 3 and movable end 4; Described method of adjustment comprises the following steps:
Step 1, calculates the best angle of radial vortex blade 2, and described best angle is the spout when this burnerThe angle of radial vortex blade 2 when the swirl strength in flow field is maximum;
Step 2, calculates the best vertical range that described best angle is corresponding, and described best vertical range is for working as oneWhen radial vortex blade 2 is positioned at described best angle, another adjacent with a described radial vortex blade 2 radiallyThe stiff end 3 of swirl vane 2 is to the vertical range of a described radial vortex blade 2;
Step 3, adjusts radial vortex blade 2, described in described in making, the stiff end 3 of another radial vortex blade 2 arrivesThe vertical range of a radial vortex blade 2 is described best vertical range.
The method of adjustment of swirl vane best angle radially in turbulent burner of the present invention, with best vertical rangeMeasurement has replaced the measurement of best angle, has replaced angular surveying with linear measure longimetry, uses common dimensional measuring instrumentThe location, scene that can realize radial vortex blade, makes burner nozzle flow field swirl strength reach suitable intensity, fromAnd the actual performance that has ensured burner reaches optimum.
In a feasible embodiment, guiding device 10 also comprises the first dividing plate 11 and second partition of annular12, the first dividing plates 11 and second partition 12 are parallel to each other, the axis of the axis of second partition 12 and the first dividing plate 11Overlap, the external diameter of the first dividing plate 11 equates with the external diameter of second partition 12, and the internal diameter of the first dividing plate 11 is greater than secondThe internal diameter of dividing plate 12; Multiple radial vortex blades 2 between the first dividing plate 11 and second partition 12, along first everyCircumferentially evenly being spaced of plate 11, radial vortex blade 2 is rectangle, the size of each radial vortex blade 2 andShape is all identical, and radial vortex blade 2 is perpendicular to the first dividing plate 11, specifically as shown in Figure 1. Burner nozzle streamWind in enters between the first dividing plate 11 and second partition 12, after being changed its course by radial vortex blade 2 water conservancy diversion, fromAnnular channel between the inner circle of the inner circle of the first dividing plate 11 and second partition 12 flows out, the spout flow field of this burnerSwirl strength be the swirl strength of outer second air road 23 inner fluids.
Wherein, each radial vortex blade 2 all can rotate taking the stiff end of described radial vortex blade 23 as axle,Described stiff end 3 is positioned at the edge of the first dividing plate 11, and described movable end 4 is positioned at the edge and first of the first dividing plate 11Between dividing plate 11 center, the pivot center of radial vortex blade 2 is parallel with the axis of the first dividing plate 11. Radially revolveFlow blade 2 in the time of enable possition, the distance of the axis of stiff end 3 to first dividing plates 11 of described radial vortex blade 2From the distance of axis of movable end 4 to first dividing plates 11 that is greater than described radial vortex blade 2; Radial vortex blade2 in the time of contract fully position, the distance of the axis of stiff end 3 to first dividing plates 11 of described radial vortex blade 2 etc.In the distance of the axis of movable end 4 to first dividing plates 11 of described radial vortex blade 2.
One preferred embodiment in, the distance between the stiff end 3 of two adjacent radial vortex blades 2 etc.The distance arriving between the movable end 4 of a described radial vortex blade 2 in the stiff end 3 of a radial vortex blade 2,The movable end 4 of radial vortex blade 2 can turn to the radial vortex blade 2 adjacent with described radial vortex blade 2Stiff end 3 places.
In step 1 of the present invention, the computing formula of described swirl strength is:
In described computing formula, I is the swirl strength of outer second air road 23 inner fluids, without unit; α is for radiallyThe angle of swirl vane 2, the angle of described radial vortex blade 2 is in adjacent two radial vortex blades 2 oneThe angle of joint face between the stiff end 3 of radial vortex blade 2 and described two adjacent radial vortex blades 2, singlePosition be °;The corresponding central angle in space between the stiff end 3 of two adjacent radial vortex blades 2, unitFor °.
That is to say, in the formula of the swirl strength of step 1, α is the described radial vortex leaf in step 2The angle of sheet 2, the angle of a described radial vortex blade 2 be a described radial vortex blade 2 and joint face itBetween angle, unit is ° that described joint face refers to that the stiff end 3 of a described radial vortex blade 2 is with described anotherVirtual link face between the stiff end 3 of a radial vortex blade 2;For described joint face is at multiple radial vortexsThe upper corresponding central angle of place circle of the stiff end 3 of blade 2, unit is °, hence one can see that,ItsIn n be the number of radial vortex blade 2, without unit.
From the concept of maximum and derivative, in the time that I is maximum, I '=0, wherein I ' is the single order of I about αDerivative. Therefore, according to the computing formula of described swirl strength, solve and work as I '=0, α existsScopeIn angle value, can learn the best angle of radial vortex blade 2. In the calculating of this step, can pass throughMatlab software is realized, and certainly, also can replace Matlab software by other account form.
Distance between the stiff end 3 of two adjacent radial vortex blades 2 equals a radial vortex blade 2Stiff end 3 during to distance between the movable end 4 of described radial vortex blade 2, if describedly radially revolve α=0 °Stream blade 2 is in contract fully position, and the movable end 4 of described radial vortex blade 2 is positioned at multiple radial vortex bladesOn the place circle of 2 stiff end 3; IfDescribed radial vortex blade 2 is in full open position.
In step 2 of the present invention, the movable end 4 of a described radial vortex blade 2 towards with described another footpathTilt to swirl vane 2;
The computing formula of described best vertical range is
In described computing formula, h*For best vertical range, unit is mm; R is described radial vortex blade 2The place radius of a circle of stiff end 3, unit is mm; α*For described best angle, unit is °.
By above calculating, the present invention, by the angular surveying of current best angle, is converted to the distance of best vertical rangeMeasure, in the time adjusting described best vertical range, can use the simple instruments such as set square as survey tool, comeReplace special angular surveying instrument, the location of realizing exactly radial vortex blade 2, is specially adapted to on-the-spot surveyAmount and adjustment.
Concrete, step 3 of the present invention comprises the following steps:
Step 3.1, makes a right-angle side of described set square be connected to the fixing of described another radial vortex blade 2End 3, makes another right-angle side of described set square align with a described radial vortex blade 2;
Step 3.2, rotates a described radial vortex blade 2, makes adjacent with a described radial vortex blade 2The stiff end 3 of described another radial vortex blade 2 equals institute to the vertical range of a described radial vortex blade 2State best vertical range, then the position of radial vortex blade 2 is fixed, this radial vortex blade 2 no longer canRotate.
Described method of adjustment is further comprising the steps of:
Step 4, according to step 3, adjusts each radial vortex blade 2, until adjusted all footpathsTo swirl vane 2. If in the time that the movable end 4 of radial vortex blade 2 is fixed with linkage, adjust one radiallyThe angle of swirl vane 2, what the angle of all radial vortex blades 2 all can be synchronous is adjusted, does not now containStep 4.
By above-mentioned known, the present invention can determine the best angle of radial vortex blade 2 quickly and accurately, meanwhile,Can also replace special angular surveying instrument with for example square of simple distance test instrument, accurately realize footpathTo the location of swirl vane 2, be specially adapted to on-the-spot measurement and adjustment.
The foregoing is only the schematic detailed description of the invention of the present invention, not in order to limit scope of the present invention. AnyThose skilled in the art, is not departing from equivalent variations and the amendment under the prerequisite of design of the present invention and principle, done,All should belong to the scope of protection of the invention. And it should be noted that, each part of the present invention is not limited inState overall applicability, each technical characterictic of describing in description of the present invention can be selected according to actual needs one and adopt separatelyWith or select the multinomial use that combines, therefore, its relevant with this case inventive point naturally contained in the present inventionHe combines and specifically application.
Claims (10)
1. a method of adjustment for swirl vane best angle radially in turbulent burner, is characterized in that, described in revolveStream burner contains guiding device (10), and guiding device (10) contains multiple radial vortex blades (2), radially revolvesStream blade (2) comprises stiff end (3) and movable end (4); Described method of adjustment comprises the following steps:
Step 1, calculates the best angle of radial vortex blade (2), and described best angle is when this burnerThe angle of radial vortex blade (2) when the swirl strength in spout flow field is maximum;
Step 2, calculates the best vertical range that described best angle is corresponding, and described best vertical range is for working as oneWhen radial vortex blade (2) is positioned at described best angle, another adjacent with a described radial vortex blade (2)The stiff end (3) of individual radial vortex blade (2) is to the vertical range of a described radial vortex blade (2);
Step 3, adjusts radial vortex blade (2), makes the stiff end (3) of described another radial vortex blade (2)Be described best vertical range to the vertical range of a described radial vortex blade (2).
2. method of adjustment according to claim 1, is characterized in that, guiding device (10) also comprises annulusFirst dividing plate (11) of shape and second partition (12), the first dividing plate (11) and second partition (12) are parallel to each other,Multiple radial vortex blades (2) between the first dividing plate (11) and second partition (12) along the first dividing plate (11)Be circumferentially evenly spaced, radial vortex blade (2) is rectangle, the size of each radial vortex blade (2) andShape is all identical, and radial vortex blade (2) is perpendicular to the first dividing plate (11).
3. method of adjustment according to claim 2, is characterized in that, each radial vortex blade (2) is energy allEnough stiff ends (3) taking described radial vortex blade (2) are axle rotation, described stiff end (3) be positioned at first everyThe edge of plate (11), described movable end (4) is positioned at the edge of the first dividing plate (11) and the first dividing plate (11)Between center, the pivot center of radial vortex blade (2) is parallel with the axis of the first dividing plate (11).
4. method of adjustment according to claim 3, is characterized in that, adjacent two radial vortex blades (2)Stiff end (3) between distance equal the upper stiff end (3) of a radial vortex blade (2) to movable end (4)Between distance, the movable end (4) of radial vortex blade (2) can turn to and described radial vortex blade (2)The stiff end (3) of adjacent radial vortex blade (2) is located.
5. method of adjustment according to claim 1, is characterized in that, in step 1, and described swirl strengthComputing formula be
In described computing formula, the swirl strength in the spout flow field that I is this burner, without unit; α is for radially revolvingThe angle of stream blade (2), the angle of described radial vortex blade (2) is adjacent two radial vortex blades (2)In between a radial vortex blade (2) and the stiff end (3) of described adjacent two radial vortex blades (2)The angle of joint face, unit is °;For between the stiff end (3) of adjacent two radial vortex blades (2)The corresponding central angle in space, unit is °.
6. method of adjustment according to claim 5, is characterized in that, in the time of α=0 °, and described radial vortexBlade (2) is in contract fully position; WhenTime, described radial vortex blade (2) is in entirely opening positionPut.
7. method of adjustment according to claim 5, is characterized in that, in step 2, described one radiallyThe movable end (4) of swirl vane (2) is towards tilting with described another radial vortex blade (2);
The computing formula of described best vertical range is
In described computing formula, h*For best vertical range, unit is mm; R is described radial vortex blade (2)The place radius of a circle of stiff end (3), unit is mm; α*For described best angle, unit is °.
8. method of adjustment according to claim 7, is characterized in that, in step 3, described in adjustWhen good vertical range, use set square as survey tool.
9. method of adjustment according to claim 8, is characterized in that, step 3 comprises the following steps:
Step 3.1, makes a right-angle side of described set square be connected to described another radial vortex blade (2)Stiff end (3), makes another right-angle side of described set square align with a described radial vortex blade (2);
Step 3.2, rotates a described radial vortex blade (2), makes described another radial vortex blade (2)Stiff end (3) equal described best vertical range to the vertical range of a described radial vortex blade (2).
10. method of adjustment according to claim 1, is characterized in that, described method of adjustment also comprises following stepRapid:
Step 4, according to step 3, adjusts each radial vortex blade (2), until adjusted allRadial vortex blade (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610031232.2A CN105605565B (en) | 2016-01-18 | 2016-01-18 | The method of adjustment of radial direction swirl vane best angle in turbulent burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610031232.2A CN105605565B (en) | 2016-01-18 | 2016-01-18 | The method of adjustment of radial direction swirl vane best angle in turbulent burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105605565A true CN105605565A (en) | 2016-05-25 |
| CN105605565B CN105605565B (en) | 2017-09-22 |
Family
ID=55985723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610031232.2A Active CN105605565B (en) | 2016-01-18 | 2016-01-18 | The method of adjustment of radial direction swirl vane best angle in turbulent burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105605565B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0921507A (en) * | 1995-07-05 | 1997-01-21 | Hitachi Ltd | Pulverized coal firing method and its apparatus and air swirling device |
| JP2011127866A (en) * | 2009-12-21 | 2011-06-30 | Ihi Corp | Pulverized coal burner |
| CN202561738U (en) * | 2012-05-16 | 2012-11-28 | 神华集团有限责任公司 | Tangential cyclone air inlet mechanism for pulverized coal burner |
| CN203718826U (en) * | 2014-01-21 | 2014-07-16 | 烟台龙源电力技术股份有限公司 | Turbulent burner and secondary air adjusting device thereof |
| CN105090949A (en) * | 2015-09-02 | 2015-11-25 | 华北电力科学研究院有限责任公司 | Method for making air inflows of secondary air pipes of turbulent burner even and measuring device |
-
2016
- 2016-01-18 CN CN201610031232.2A patent/CN105605565B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0921507A (en) * | 1995-07-05 | 1997-01-21 | Hitachi Ltd | Pulverized coal firing method and its apparatus and air swirling device |
| JP2011127866A (en) * | 2009-12-21 | 2011-06-30 | Ihi Corp | Pulverized coal burner |
| CN202561738U (en) * | 2012-05-16 | 2012-11-28 | 神华集团有限责任公司 | Tangential cyclone air inlet mechanism for pulverized coal burner |
| CN203718826U (en) * | 2014-01-21 | 2014-07-16 | 烟台龙源电力技术股份有限公司 | Turbulent burner and secondary air adjusting device thereof |
| CN105090949A (en) * | 2015-09-02 | 2015-11-25 | 华北电力科学研究院有限责任公司 | Method for making air inflows of secondary air pipes of turbulent burner even and measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105605565B (en) | 2017-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20090218000A1 (en) | Apparatus for Redirecting a Medium Flowing in a Pipeline | |
| RU2016142786A (en) | LOCATION OF COMBUSTION CHAMBER BURNERS | |
| CN105091959B (en) | A kind of focusing orifice flowmeter and its application method | |
| KR20140003558A (en) | Solid fuel burner and combustion device using same | |
| CN203443970U (en) | Direction controllable pitot tube | |
| CN107551774A (en) | A kind of denitration control method and system for thermal power plant | |
| CN105605565A (en) | Method for adjusting optimal angle of radial swirl blades in swirl burner | |
| CN105618244A (en) | Primary air flow mixing and equilibrating device for round air duct of coal mill inlet | |
| CN203824756U (en) | Rectifier for eliminating propellant flow distortion in engine test | |
| CN206681802U (en) | Gas turbine inlet guide vanes debugging apparatus | |
| CN102116653B (en) | Split-flow split-phase gas-liquid phase fluid flowmeter and split-flow coefficient determining method | |
| CN208872360U (en) | A kind of Venturi nozzle | |
| CN103336141A (en) | Wind speed and wind volume measuring device based on static pressure principle | |
| CN203963984U (en) | Multi-axes synchronous mechanism | |
| TW538216B (en) | Splitter plate arrangement for a flue gas stack | |
| Johnson et al. | Design and Capabilities of NISTs Scale-Model Smokestack Simulator (SMSS) | |
| CN209622766U (en) | A kind of coal burner | |
| CN112857501A (en) | Filtering and rectifying device | |
| CN208155365U (en) | Impeller on gas flowmeter | |
| CN203069212U (en) | Cross section rectifier type flowmeter | |
| CN206943808U (en) | Environmentally friendly air mixture delivery pipe | |
| CN206330635U (en) | Ultrasonic water meter | |
| CN206832679U (en) | A kind of flue gas measurement apparatus | |
| CN210513285U (en) | Novel flow adjuster and metering device integration device | |
| CN204359255U (en) | A kind of MW class wind turbine group water-cooling system ball valve angle detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |