CN104722386A - Air ring air speed distribution measurement and adjustment device and method of coal mill - Google Patents
Air ring air speed distribution measurement and adjustment device and method of coal mill Download PDFInfo
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- CN104722386A CN104722386A CN201510133877.2A CN201510133877A CN104722386A CN 104722386 A CN104722386 A CN 104722386A CN 201510133877 A CN201510133877 A CN 201510133877A CN 104722386 A CN104722386 A CN 104722386A
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- vane
- wind speed
- coal
- coal pulverizer
- speed profile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
- G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention relates to an air ring air speed distribution measurement and adjustment device and method of a coal mill. The air ring air speed distribution measurement and adjustment device comprises a plurality of pitot tubes corresponding to air ring openings one by one, a plurality of pressure measuring devices and connection pipes which correspond to the pitot tubes one by one, a plurality of flow guide plates located in an inlet air channel, and adjusting rods corresponding to the flow guide plates one by one, wherein each pitot tube is provided with a measuring head, a static pressure hole and a total pressure hole; each measuring head is located under the corresponding air ring opening and is just opposite to the air direction of an air ring inlet; the total pressure holes and the static pressure holes are connected with the pressure measuring devices by the connection pipes; the flow guide plates are arranged on the adjusting rods; a plurality of pairs of through holes corresponding to the adjusting rods one by one are formed in the wall surface of the inlet air channel; the adjusting rods are sleeved with the through holes; and the two ends of the adjusting rods stretch out of the wall surface of the inlet air channel. According to the air ring air speed distribution measurement and adjustment device, the air ring air speed distribution is measured by the pitot tubes and adjusted by the flow guide plates, and raw coal is prevented from falling from air rings with the low air speed, so that the problem of discharging the raw coal of the coal mill is solved, the utilization rate of the raw coal is improved and the production cost is reduced.
Description
Technical field
The present invention relates to coal pulverizer technical field, the vane wind speed profile particularly relating to a kind of coal pulverizer is measured and adjusting device and method.
Background technology
At present, the First air of coal pulverizer enters coal pulverizer milling zone from the bottom to top by vane, pebble coal drops down onto pebble coal header from top to bottom by vane, but in actual motion, often there is the problem that raw coal arranged in a large number by coal pulverizer, its important reason is that vane wind speed is inadequate, usually improves vane wind speed on the whole and solves coal pulverizer by improving ventilation and reducing these two kinds of methods of vane circulation area and arrange raw coal problem in a large number.But in actual motion, even if make the vane wind speed of calculating reach theory calls by improving ventilation, still there is the problem of row's raw coal in some coal pulverizers.Although above two kinds of methods can calculate the mean wind speed of vane, cannot reflect the distribution situation of vane wind speed, when vane wind speed profile exists larger deviation, raw coal falls from the vane that wind speed is low, causes the waste of raw coal.
Summary of the invention
The object of the present invention is to provide a kind of vane wind speed profile of coal pulverizer to measure and adjusting device and method, can measure and adjust the distribution situation of vane wind speed, solve the problem of coal pulverizer row raw coal, the utilization rate of raising raw coal.
For realizing object of the present invention, the technical scheme taked is:
A kind of vane wind speed profile of coal pulverizer is measured and adjusting device, vane is provided with multiple vane mouth, vane mouth is provided with wind inlet end, coal pulverizer comprises the below being positioned at vane, and the pebble coal header of close wind inlet end, and the inlet conduits to be communicated with pebble coal header sidewall, the vane wind speed profile of coal pulverizer measures and adjusting device comprises and vane mouth multiple Pitot tube one to one, and with Pitot tube multiple pressometer and multiple tube connector one to one, be positioned at multiple deflectors of inlet conduits, and with deflector adjusting rod one to one, Pitot tube is provided with gage outfit, baroport and pitot hole, gage outfit is positioned at the below of vane mouth, and just to vane entrance wind direction, pitot hole is all connected with pressometer by tube connector with baroport, deflector is located on adjusting rod, the wall of inlet conduits is provided with and adjusting rod multipair through hole one to one, adjusting rod is socketed in through hole, and wall is all stretched out in two ends.
By arranging Pitot tube at the wind inlet end of each vane mouth, and measure the pressure reduction between baroport and pitot hole by pressometer, thus obtain the wind speed of corresponding vane mouth, and obtain the distribution situation of vane wind speed according to the measurement result of each pressometer; Again by arranging multiple deflector at the inlet conduits of coal pulverizer, and the angle of primary air piping flow direction in deflector and inlet conduits is regulated by adjusting rod, when there is larger deviation in vane wind speed profile, then divide the situation of speed distribution according to vane, the deflector of diverse location is adjusted, makes the wind speed profile of vane each vane mouth even, prevent raw coal from falling from the vane that wind speed is low, thus solve the problem of coal pulverizer row raw coal, improve the utilization rate of raw coal, lower production cost.And deflector and adjusting rod one_to_one corresponding, each deflector can regulate separately, vane wind speed profile is adjusted more flexible.
Below technical scheme is further illustrated:
Further, the vane wind speed profile of coal pulverizer measures and adjusting device also comprises mounting bracket, and mounting bracket is located on the inwall of pebble coal header, and multiple Pitot tube is all fixed on mounting bracket.By mounting bracket, Pitot tube is fixed on the inlet air side of vane.
Be further, the vane wind speed profile of coal pulverizer measures and adjusting device also comprises multipair pressure test tube and multiple connection plug, multiple connection plug is evenly fixed on inwall, pressure test tube is by connecting the wall of plug through pebble coal header, often pair of corresponding Pitot tube of pressure test tube, one end of pressure test tube is connected with tube connector, and the other end is connected with pressometer.By pressure test tube, the pressure signal of tube connector is drawn pebble coal header, makes measurement more convenient, and ensure the air-tightness of pebble coal header by connecting plug, make the data of measurement more accurate.
Further, the vane wind speed profile of coal pulverizer measures and adjusting device also comprises the crane span structure be fixed on inwall, and crane span structure is positioned on same mounting plane with multiple plug that is connected, and tube connector is contained on crane span structure.Pitot tube and the tube connector connected between plug are placed on crane span structure, the tube connector in pebble coal header is neatly placed.
Further, inner wall even distribution has three crane span structures, makes the placement of tube connector more rationally neat.
Further, the external diameter of Pitot tube is not more than 6mm.When the external diameter of Pitot tube is not more than 6mm, the wind speed profile of vane is not had an impact.
Further, the cross section of deflector is curved, the opposing parallel setting of multiple deflector, there is spacing between two adjacent deflectors.The opposing parallel setting of multiple deflector, makes the adjustment of deflector simpler; And deflector is arc, reduce the resistance of inlet conduits.
Further, deflector is provided with the axis hole coordinated with adjusting rod, and deflector is sheathed on adjusting rod.Deflector rotates along with the rotation of adjusting rod, makes the adjustment of deflector simpler.
Further, one end of adjusting rod is provided with angle scale, and the other end is provided with handle.Controlled to adjust the angle of bar adjustment by angle scale, make the adjustment of deflector more precisely quick; And by handle rotary regulating lever, make the adjustment of adjusting rod simpler.
The present invention also provides a kind of measurement and method of adjustment of vane wind speed profile of coal pulverizer, and the vane wind speed profile comprising coal pulverizer is measured and adjusting device, comprises the following steps:
Start coal pulverizer, do not deliver coal to coal pulverizer, to inlet conduits air-supply, measure the pressure reduction of each Pitot tube, calculate the vane wind speed profile measurement result under the first state;
Deliver coal to coal pulverizer, measure the pressure reduction of each Pitot tube, calculate the vane wind speed profile measurement result under the second state;
Calculate the vane wind speed deviation under the first state and the second state;
When vane wind speed deviation exceed ± 5% ~ 10%, adjustment deflector and the angle of inlet conduits axis.
Compared with prior art, the present invention has following beneficial effect:
The present invention is by arranging Pitot tube at the wind inlet end of each vane mouth, and measure the pressure reduction between baroport and pitot hole by pressometer, thus obtain the wind speed of corresponding vane mouth, and obtain the distribution situation of vane wind speed according to the measurement result of each pressometer; Again by arranging multiple deflector at the inlet conduits of coal pulverizer, and the angle of primary air piping flow direction in deflector and inlet conduits is regulated by adjusting rod, when there is larger deviation in vane wind speed profile, then divide the situation of speed distribution according to vane, the deflector of diverse location is adjusted, makes the wind speed profile of vane each vane mouth even, prevent raw coal from falling from the vane that wind speed is low, thus solve the problem of coal pulverizer row raw coal, improve the utilization rate of raw coal, lower production cost.
Accompanying drawing explanation
Fig. 1 is the vane wind speed profile measurement of embodiment of the present invention coal pulverizer and the structural representation of adjusting device;
Fig. 2 is the A direction view of Fig. 1;
Fig. 3 is the B-B cross-sectional view of Fig. 1;
Fig. 4 is the structural representation of embodiment of the present invention Pitot tube;
Fig. 5 is the structural representation of embodiment of the present invention deflector.
Description of reference numerals:
10. vane, 110. vane mouths, 111. wind inlet ends, 20. pebble coal headers, 210. connect plug, 220. inwalls, 30. inlet conduits, 310. walls, 320. through holes, 40. Pitot tubes, 410. tube connectors, 420. gage outfits, 430. baroports, 440. pitot holes, 50. deflectors, 510. axis holes, 60. adjusting rods, 70. mounting brackets, 80. pressure test tubes, 910. angle scales, 920. handles.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail:
As shown in Figures 1 to 4, a kind of vane wind speed profile of coal pulverizer is measured and adjusting device, vane 10 is provided with multiple vane mouth 110, vane mouth 110 is provided with wind inlet end 111, coal pulverizer comprises the below being positioned at vane 10, and the pebble coal header 20 of close wind inlet end 111, and the inlet conduits 30 to be communicated with pebble coal header 20 sidewall, the vane wind speed profile of coal pulverizer measures and adjusting device comprises and vane mouth 110 multiple Pitot tube 40 one to one, and with Pitot tube 40 multiple pressometer (accompanying drawing does not identify) and multiple tube connector 410 one to one, be positioned at multiple deflectors 50 of inlet conduits 30, and with deflector 50 adjusting rod 60 one to one, Pitot tube 40 is provided with gage outfit 420, baroport 430 and pitot hole 440, gage outfit 420 is positioned at the below of vane mouth 110, and just to vane 10 entrance wind direction, pitot hole 440 is all connected with pressometer by tube connector 410 with baroport 430, deflector 50 is located on adjusting rod 60, and part stretches in pebble coal header 20, the wall 310 of inlet conduits 30 is provided with and adjusting rod 60 multipair through hole 320 one to one, adjusting rod 60 is socketed in through hole 320, and wall 310 is all stretched out at two ends.
By arranging Pitot tube 40 at the wind inlet end 111 of each vane mouth 110, and measure the pressure reduction between baroport 430 and pitot hole 440 by pressometer, thus obtain the wind speed of corresponding vane mouth 110, and obtain the distribution situation of vane 10 wind speed according to the measurement result of each pressometer; Again by arranging multiple deflector 50 at the inlet conduits 30 of coal pulverizer, and the angle of primary air piping flow direction in deflector 50 and inlet conduits 30 is regulated by adjusting rod 60, when there is larger deviation in vane 10 wind speed profile, then according to the situation of vane 10 points speed distribution, the deflector 50 of diverse location is adjusted, make the wind speed profile of vane 10 each vane mouth 110 even, prevent raw coal from falling from the vane 10 that wind speed is low, thus solve the problem of coal pulverizer row raw coal, improve the utilization rate of raw coal, lower production cost.And deflector 50 and adjusting rod 60 one_to_one corresponding, each deflector 50 can regulate separately, vane wind speed profile is adjusted more flexible.
In the present embodiment, as shown in Figure 3 and Figure 4, gage outfit 420, just to the air flow direction of vane mouth 110 wind inlet end 111, makes the data of measurement more accurate.And tube connector 410 is high-temp .-resistant rubber duct, at least ensures that tube connector 410 can the high temperature of resistance to about 300 DEG C, and require that the external diameter of Pitot tube 40 is not more than 6mm, avoid having an impact to the wind speed profile of vane 10.
As shown in Figure 3, the vane wind speed profile of coal pulverizer measures and adjusting device also comprises mounting bracket 70, and mounting bracket 70 is located on the inwall 220 of pebble coal header 20, and multiple Pitot tube 40 is all fixed on mounting bracket 70.By mounting bracket 70, Pitot tube 40 is fixed on wind inlet end 111 side of vane 10.
In the present embodiment, mounting bracket 70 is combined by pipe, and in order to avoid having an impact to the distribution of vane 10 wind speed, the diameter of pipe is not more than 6mm.
As shown in Figure 3, the vane wind speed profile of coal pulverizer measures and adjusting device also comprises multipair pressure test tube 80 and multiple connection plug 210, multiple connection plug 210 is evenly fixed on inwall 220, pressure test tube 80 is by connecting the wall 310 of plug 210 through pebble coal header 20, each connection plug 210 is provided with multipair pressure test tube 80, often pair of corresponding Pitot tube 40 of pressure test tube 80, one end of pressure test tube 80 is connected with tube connector 410, and the other end is connected with pressometer.By pressure test tube 80, tube connector 410 is drawn pebble coal header 20, make measurement more convenient, and ensure the air-tightness of pebble coal header 20 by connecting plug 210, make the data of measurement more accurate.
The vane wind speed profile of coal pulverizer measures and adjusting device also comprises the crane span structure (accompanying drawing does not identify) be fixed on inwall 220, and crane span structure is positioned on same mounting plane with multiple plug 210 that is connected.Pitot tube 40 and the tube connector 410 connected between plug 210 are placed on crane span structure, the tube connector 410 in pebble coal header 20 is neatly placed.
In the present embodiment, inwall 220 is along the circumferential direction evenly equipped with three crane span structures, makes the placement of tube connector 410 more rationally neat.
As depicted in figs. 1 and 2, the cross section of deflector 50 is curved, the opposing parallel setting of multiple deflectors 50, there is spacing between two adjacent deflectors 50.The opposing parallel setting of multiple deflectors 50, makes the adjustment of deflector 50 simpler; And deflector 50 is arc, reduce the resistance of inlet conduits 30.
In the present embodiment, the vane wind speed profile of coal pulverizer measures and adjusting device is provided with four deflectors 50, and the vane wind speed profile of coal pulverizer measures and adjusting device can also arrange plural deflector 50 according to the size of inlet conduits 30 and vane 10; Deflector 50 also can be arranged to other shapes according to actual needs.
As shown in Figure 5, deflector 50 is provided with the axis hole 510 coordinated with adjusting rod 60, and deflector 50 is sheathed on adjusting rod 60.Deflector 50 rotates along with the rotation of adjusting rod 60, makes the adjustment of deflector 50 simpler.
As shown in Figure 2 and Figure 5, one end of adjusting rod 60 is provided with angle scale 910, and the other end is provided with handle 920.Controlled to adjust the angle of bar 60 adjustment by angle scale 910, make the adjustment of deflector 50 more precisely quick; And by handle 920 rotary regulating lever 60, make the adjustment of adjusting rod 60 simpler.
The vane wind speed profile of coal pulverizer measures and adjusting device also comprises the locking device (accompanying drawing does not identify) being fixed on inlet conduits 30 outer wall, and locking device is provided with the holddown groove coordinated with adjusting rod 60 periphery.After the adjustment of adjusting rod 60 completes, by locking device, each adjusting rod 60 is locked, prevent from being moved at work, ensure the vane wind speed profile measurement of coal pulverizer and the stability of adjusting device.
The present invention also provides a kind of measurement and method of adjustment of vane wind speed profile of coal pulverizer, and the vane wind speed profile comprising coal pulverizer is measured and adjusting device, comprises the following steps:
Start coal pulverizer, do not deliver coal to coal pulverizer, blow to inlet conduits 30, measure the pressure reduction of each Pitot tube 40, calculate the vane 10 wind speed profile measurement result under the first state;
Deliver coal to coal pulverizer, measure the pressure reduction of each Pitot tube 40, calculate the vane 10 wind speed profile measurement result under the second state;
Calculate the vane 10 wind speed deviation under the first state and the second state;
When vane 10 wind speed deviation exceed ± 5% ~ 10%, the angle of adjustment deflector 50 and inlet conduits 30 axis.
The present invention is in practice process, and in order to prevent Pitot tube 40 from being blocked by the fine breeze fallen from vane 10, the measurement of vane 10 wind speed profile need be carried out in one week after coal pulverizer startup first.When using the measurement of the vane wind speed profile of coal pulverizer of the present invention and adjusting device to measure, in order to ensure the accuracy of data, cold conditions measurement and hot state measurement need be carried out, when carrying out cold conditions measurement, start coal pulverizer, close feeder, and open the cold-hot air door of coal pulverizer, to ventilate to coal pulverizer, and by measuring the pressure reduction of each Pitot tube 40, calculating the wind speed profile of coal pulverizer vane 10 in the cold state; When carrying out hot state measurement, start coal pulverizer and feeder, under the condition that coal pulverizer normally runs, measure the pressure reduction of each Pitot tube 40, calculate the wind speed profile of coal pulverizer at hot lower vane 10.The measurement result of last basis vane 10 wind speed profile in hot and cold conditions situation, calculates the deviation of vane 10 wind speed, when wind speed deviation exceed ± 5% to ± 10% time, then need to adjust the wind speed profile of vane 10.
The present invention is by arranging Pitot tube 40 at the wind inlet end 111 of each vane mouth 110, and measure the pressure reduction between baroport 430 and pitot hole 440 by pressometer, thus obtain the wind speed of corresponding vane mouth 110, and obtain the distribution situation of vane 10 wind speed according to the measurement result of each pressometer; Again by arranging multiple deflector 50 at the inlet conduits 30 of coal pulverizer, and the angle of primary air piping flow direction in deflector 50 and inlet conduits 30 is regulated by adjusting rod 60, when there is larger deviation in vane 10 wind speed profile, then according to the situation of vane 10 points speed distribution, the deflector 50 of diverse location is adjusted, make the wind speed profile of vane 10 each vane mouth 110 even, prevent raw coal from falling from the vane 10 that wind speed is low, thus solve the problem of coal pulverizer row raw coal, improve the utilization rate of raw coal, lower production cost.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the vane wind speed profile of a coal pulverizer is measured and adjusting device, vane is provided with multiple vane mouth, described vane mouth is provided with wind inlet end, coal pulverizer comprises the below being positioned at vane, and the pebble coal header of close described wind inlet end, and the inlet conduits to be communicated with described pebble coal header sidewall, it is characterized in that, comprise and described vane mouth multiple Pitot tube one to one, and with described Pitot tube multiple pressometer and multiple tube connector one to one, be positioned at multiple deflectors of described inlet conduits, and with described deflector adjusting rod one to one, described Pitot tube is provided with gage outfit, baroport and pitot hole, described gage outfit is positioned at the below of described vane mouth, and just to vane entrance wind direction, described pitot hole is all connected with described pressometer by described tube connector with described baroport, described deflector is located on described adjusting rod, the wall of described inlet conduits is provided with and described adjusting rod multipair through hole one to one, described adjusting rod is socketed in described through hole, and described wall is all stretched out at two ends.
2. the vane wind speed profile of coal pulverizer according to claim 1 is measured and adjusting device, and it is characterized in that, also comprise mounting bracket, described mounting bracket is located on the inwall of described pebble coal header, and multiple described Pitot tube is all fixed on described mounting bracket.
3. the vane wind speed profile of coal pulverizer according to claim 2 is measured and adjusting device, it is characterized in that, also comprise multipair pressure test tube and multiple connection plug, multiple described connection plug is evenly fixed on described inwall, described pressure test tube is by the wall of described connection plug through described pebble coal header, the corresponding described Pitot tube of pressure test tube described in a pair, one end of described pressure test tube is connected with described tube connector, and the other end is connected with described pressometer.
4. the vane wind speed profile of coal pulverizer according to claim 3 is measured and adjusting device, it is characterized in that, also comprise the crane span structure be fixed on described inwall, described crane span structure is positioned on same mounting plane with multiple described plug that is connected, and described tube connector is contained on described crane span structure.
5. the vane wind speed profile of coal pulverizer according to claim 4 is measured and adjusting device, and it is characterized in that, described inner wall even distribution has three described crane span structures.
6. the vane wind speed profile of the coal pulverizer according to any one of claim 1 to 5 is measured and adjusting device, and it is characterized in that, the external diameter of described Pitot tube is not more than 6mm.
7. the vane wind speed profile of coal pulverizer according to claim 1 is measured and adjusting device, and it is characterized in that, the cross section of described deflector is curved, the opposing parallel setting of multiple described deflectors, there is spacing between two adjacent described deflectors.
8. the vane wind speed profile of coal pulverizer according to claim 1 is measured and adjusting device, and it is characterized in that, described deflector is provided with the axis hole coordinated with described adjusting rod, and described deflector is sheathed on described adjusting rod.
9. the vane wind speed profile of the coal pulverizer according to claim 7 or 8 is measured and adjusting device, and it is characterized in that, one end of described adjusting rod is provided with angle scale, and the other end is provided with handle.
10. the measurement of the vane wind speed profile of coal pulverizer and a method of adjustment, the vane wind speed profile comprising the coal pulverizer as described in any one of claim 1 to 9 is measured and adjusting device, it is characterized in that, comprises the following steps:
Start coal pulverizer, do not deliver coal to coal pulverizer, to inlet conduits air-supply, measure the pressure reduction of each Pitot tube, calculate the vane wind speed profile measurement result under the first state;
Deliver coal to coal pulverizer, measure the pressure reduction of each Pitot tube, calculate the vane wind speed profile measurement result under the second state;
Calculate the vane wind speed deviation under the first state and the second state;
When vane wind speed deviation exceed ± 5% ~ 10%, adjustment deflector and the angle of inlet conduits axis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510133877.2A CN104722386B (en) | 2015-03-25 | 2015-03-25 | Air ring air speed distribution measurement and adjustment device and method of coal mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510133877.2A CN104722386B (en) | 2015-03-25 | 2015-03-25 | Air ring air speed distribution measurement and adjustment device and method of coal mill |
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| CN104722386A true CN104722386A (en) | 2015-06-24 |
| CN104722386B CN104722386B (en) | 2017-02-22 |
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| CN107677110A (en) * | 2017-11-13 | 2018-02-09 | 福州大学 | A kind of control system of synthetic leather baking oven air duct flow field |
| CN111198090A (en) * | 2020-01-15 | 2020-05-26 | 交通运输部天津水运工程科学研究所 | Probe for measuring wall friction speed in wind tunnel test and test method thereof |
| CN114870965A (en) * | 2022-05-06 | 2022-08-09 | 昌弘智能装备(河北)有限公司 | Lime block crusher |
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| CN114870965A (en) * | 2022-05-06 | 2022-08-09 | 昌弘智能装备(河北)有限公司 | Lime block crusher |
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| Publication number | Publication date |
|---|---|
| CN104722386B (en) | 2017-02-22 |
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