CN1792748A - Plate door spring air locking flow monitoring device - Google Patents
Plate door spring air locking flow monitoring device Download PDFInfo
- Publication number
- CN1792748A CN1792748A CN 200510127707 CN200510127707A CN1792748A CN 1792748 A CN1792748 A CN 1792748A CN 200510127707 CN200510127707 CN 200510127707 CN 200510127707 A CN200510127707 A CN 200510127707A CN 1792748 A CN1792748 A CN 1792748A
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- spring
- coal dust
- door
- monitoring device
- powder
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- 238000012806 monitoring device Methods 0.000 title claims description 15
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000002817 coal dust Substances 0.000 claims description 42
- 230000006835 compression Effects 0.000 claims description 23
- 238000007906 compression Methods 0.000 claims description 23
- 239000003245 coal Substances 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000005483 Hooke's law Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 2
- 230000004064 dysfunction Effects 0.000 claims 2
- 239000000843 powder Substances 0.000 description 43
- 238000002360 preparation method Methods 0.000 description 13
- 230000005484 gravity Effects 0.000 description 10
- 238000007789 sealing Methods 0.000 description 10
- 230000002950 deficient Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
A flow monitor system for the pipeline used to deliver the material from low-pressure region to high-pressure region is composed of a casing, a flat gate with axle and gear, a rack bar engaged with said gear, a spring driven by said rack bar, a measuring wheel with double potentiometer for measuring the deformation of spring, and a transducer for transmitting the electric signal to remote meter. It features that the deformation of spring is used to measure the flow of material.
Description
Affiliated technical field
The present invention relates to a kind of being widely used in, have the spring loaded lock gas flow monitoring device of lock gas and discharge measurement dual-use function simultaneously by the industry of low pressure to elevated pressures district ducting material.This paper is only to the power boiler breeze preparation system, the technical description that adopts this device to do.
Background technology
Up to now, on the mill separator powder retrieving pipe road, still using the bevel-type flapper that only has lock gas simple function to there is no function of measuring in the power boiler breeze preparation system.The shortcoming of this flapper is in the utility model patent spring loaded flapper of Granted publication on December 29th, 1999, and the shortcoming that the bevel-type flapper is existed illustrates.Its main working parts all is placed in the pipeline of conveying, this not only influences back the unimpeded conveying of powder, and cause that easily the awl cap comes off, falls bar and the air channelling takes place, and reducing the defectives such as separation efficiency of mill separator, in a single day accident appears in the bevel-type flapper also can't on-call maintenance.The more important thing is that it does not possess the function of measuring of Hui Fenliang, because the nonconformity coal dust that mill separator separates can not quantize, this makes provides the supply ventilating fan and the coal powder fan that the coal dust carrying capacity is provided of air quantity to the coal dust preparation system, lack the data foundation of adjusting the fan operation load, thereby can not realize that to control back the powder amount serve as zero to be the control operation of target, the supply ventilating fan and the coal powder fan of series operation carried out reasonably automation control and regulation.Middle warehouse formula coal dust preparation system with thermal powerplant is an example, and further illustrating coal dust preparation system can not be by returning the powder amount adjustment drawback that fan operation brought: the coal mill rated output in the known coal dust preparation system is to demarcate with the outlet of mill separator.The ability that air dielectric carries coal dust is to provide the power that carries coal dust by coal powder fan, and supply ventilating fan only provides and carries the required air quantity of coal dust.Aerodynamic adjusting of coal dust preparation system in the past is to be controlled in certain scope according to the negative pressure value of regulating the coal mill inlet, coal powder fan is regulated the operation of keeping coal dust preparation system.Hui Fenliang should be controlled at minimum even be zero,, but suffer from because of not having and realizing for the object of adjusting as the main adjusting parameter of regulating fan operation.Cause thus and carry excessive amount of air, coal mill is ground still inferior-quality coal dust also to be carried out coal mill to mill separator and carries out separating treatment, and being returned coal mill by mill separator by powder retrieving pipe road foldback, the nonconformity coal dust grinds again, carry oarse-grained coal dust not only to increase the power consumption of aerodynamic force system greatly, also add the wearing and tearing of large equipment and pipeline.Inferior-quality coal dust can return coal mill and reface, and the air quantity that carries the nonconformity coal dust can not reclaim, this part unnecessary air quantity is carrying qualified coal dust and is together entering burner hearth participation burning, the caliber of delivery duct is strengthened, and the coal powder density of a wind is descended, extremely unfavorable to catching fire of boiler with steady combustion.Excessive tertiary air quantity is forced to deliver to burner hearth simultaneously, seriously influences the normal operation of boiler.With spring loaded lock gas flow monitoring device provided by the invention, replace the bevel-type flapper, except that the defective that has overcome the bevel-type flapper, the more important thing is to make system save station service power consumption rate, boiler combustion and coal dust preparation system are benefited in all many-sides such as safety and economic operations comprehensively.For new power plant construction, from design the blower fan that just can select the lower-wattage capacity, than the delivery duct of small dimension, exempt to establish the tertiary air pipeline, do not establish cyclone and coal dust bucket to reduce the bunker bay height, simplify coal dust preparation system, needn't adopt preferred version such as bin storage type pulverizing system, reduce aspects such as construction project cost, energy savings special significance is more arranged.
Summary of the invention
The invention provides a kind of device of spring loaded lock gas monitoring flow, solve problem and defective that the bevel-type flapper exists.There is the problem of two aspects in the bevel-type flapper: the one, and structurally there are many defectives in the bevel-type flapper.The device of spring loaded lock gas monitoring flow substitutes tapered cap with plain batton door, substitutes leverage with being installed in the exterior spring of pipeline, gear and spur rack.The awl cap that can overcome the existence of bevel-type flapper by these improvement comes off, falls bar and the air channelling takes place, and reduces many defectives such as separation efficiency of mill separator.The 2nd, the bevel-type flapper does not possess the function of monitoring coal dust Hui Fenliang.Moment balance relation between the elastic force of applied spring and the coal dust weight, by with dull and stereotyped door-hinge on gear and spur rack moment is passed to compression spring, spring is in elastic range, because the formed moment of gravity and the formed moment of compression of spring power of jib door plate one side always keep balance mutually, and the gravity of coal dust and length of spring compressed power are directly proportional relations according to the Hooke's law of spring, thereby the variation of compression of spring degree, just demonstrated the variation of coal dust weight.This invention comes to this and realizes that its lock gas and energy measurement go out back the technique device of powder flow.
The technical scheme that technical solution problem of the present invention is taked is: the end that bevel-type flapper lever awl is emitted changes plain batton door into, the other end of lever is used compression spring instead and is replaced weight, the centre is to replace trammel beam with gear and spur rack, be to be that fulcrum is done and swung with the edge of a knife in the middle of the original lever, a door bar axle that now changes into the plain batton door consubstantiality is that the center rotates, avoided being located at because of awl emits that the pipeline center position is stopped up coal dust easily and the awl cap comes off, falls bar and air channelling phenomenon takes place, reduced the defectives such as separation efficiency of mill separator.Spring loaded lock gas monitoring flow apparatus mainly is made up of the plain batton door, spur rack and the measuring pulley that are connected as a single entity with door bar axle, gear and several parts such as compression spring that are placed in the spring spool.The various defectives that similar bevel-type flapper is had can not take place in these parts.Housing is a fully enclosed, and spring spool, gear, measuring pulley, the spur rack of spring loaded lock gas flow monitoring device place outside the housing, monitor with maintenance very convenient.Rotating plain batton door only is housed in the housing, thus in the fully enclosed housing almost without any maintainable work capacity.Only have a bar axle to pass outside the housing in the housing, because door bar axle is very thin, the part that only has slight little radian to rotate is easy to accomplish sealing, therefore can not produce to leak out and leak powder phenomenon, the promptly energy-conservation working environment that do not pollute again.Gear on the plain batton door open and close drive door bar axle of this device is coaxial rotation with it, and the rotational synchronization of gear drives measuring pulley and rotates, and the rotation of gear drives spur rack simultaneously and does straight-line motion, and spur rack and pressure spring plate are connected as a single entity compression spring is stretched.The other end of spring is provided with the plus-minus screw handwheel, can adjust the compression of spring degree with the plus-minus screw handwheel according to the mode of operation of plain batton door, changes the height that the compression of spring degree can change sealing coal dust layer.Measuring pulley is followed gear and is rotated together, and gear rotates one section arc length, and a rotatable about week on measuring pulley is to adapt to the potential device requirements of one's work.The bipotential device is housed on the wheel axle, can reflects the variation of length of spring compressed degree, the potential change that the bipotential device is produced transmits electric current to the boiler control panel by transmitter, resets in the variation of current potential again, directly reads back the flow of powder in the distance.The flow gauge of contact-carrying can link with the air door on coal powder fan and the air supply duct, it is carried out automatic control regulate.On the spur rack of spring loaded lock gas flow monitoring device, also indicate back the powder flow scale on the spot simultaneously, use with distant place table meter contrast for on-the-spot.
The invention has the beneficial effects as follows: the present invention's purpose is to provide a kind of many defectives that can overcome the bevel-type flapper, can monitor back the powder flow again, and do not need any automatic control device, just can realize the spring loaded lock gas flow monitoring device of locking gas and measuring back the powder flow automatically.
Accompanying drawing 1 explanation
The present invention is further described below in conjunction with Figure of description 1 and embodiment.
Accompanying drawing 1 is the constructional drawing of spring loaded lock gas flow monitoring device
1 plain batton door in the accompanying drawing, 2 bar axles, 3 gears, the spur rack of 4 band flow scales, 5 measuring pulleys, 6 pressure spring plates, 7 compression springs, 8 flux scale meters, 9 spring spools, 10 plus-minus screw handwheels, 11 supports, 12 housings, 13 inspection doors
The specific embodiment
In the Figure of description 1: the housing 12 of spring loaded lock gas flow monitoring device is a leakproof tank, two ends are connected with load transfer device (pipeline) up and down, control back the powder flow with plain batton door 1, its top maintained the powder position of certain altitude when plain batton door was in closed condition.When the coal dust weight on top and closing of plain batton door deadweight, count the pressure difference value of two different pressure zones up and down again, when the vertical gravity on top and compression spring 7 formed moment shells balanced each other at this moment, plain batton door still was in closed condition, and this powder position is played the effect of lock gas and is referred to as the sealing powder position.When plain batton door can keep closed condition, illustrate that not returning the powder amount carries, when returning the powder conveying,, plain batton door is opened because the moment of dull and stereotyped reveal strengthens, drive spring simultaneously and compressed once again, reach new dynamic force moment balance.According to the Hooke's law of spring, the distortion of spring changes with proportional relationship in elastic limit as can be known, therefore, by the deflection of spring, just can calculate back the gravity flow of powder by this device.The powder position is higher than under the situation of sealing powder position, and the vertical gravity on top is greater than the elastic force of compression spring, and plain batton door is unlocked, and the aperture opened of massive plate door is also big more more for the vertical gravity on top, and the vertical gravity on top and the elastic force of compression spring are according to Hooke's law work.Plain batton door is all one with door bar axle 2 and is connected, its rotation can drive the rotation that the gear coaxial with it 3 done synchronous concentric, under the tracking that bipotential device measuring pulley 5 is housed, the signal that can produce current potential changes, by transmitter current signal is transferred to distant place dial plate, again signal is reverted to electric potential signal, offer operating personal and regulate returning powder system, or directly signal is sent to autonomous cruise speed system, coal powder fan is automatically adjusted.Making back powder system always maintain Hui Fenliang is zero state, and the coal dust ability of carrying that coal powder fan provides is described, can only carry out the coal dust of release mesh, and can not carry out the coal dust of nonconformity granularity, makes the load of blower fan reduce saving electric power greatly.The rotation of gear drives spur rack 4 and does straight-line motion, and spur rack and pressure spring plate 6 directly are connected as a single entity, thereby it is corresponding flexible that compression spring 7 is done with the plain batton door aperture.Compression spring is contained in the spring spool 9, and spring spool is fixed together by support 11 and housing wall 12, adjusts the degree of compression that plus-minus screw handwheel 10 can be adjusted compression spring, to change sealing powder position height.Can directly know the mode of operation of spring loaded lock gas flow monitoring device by the flux scale meter 8 on the tooth bar.On housing, also be provided with the inspection door 13 of transparent organic glass, can observe directly the aperture state of plain batton door.
Figure of description 2 is that quantitative relation and this device between explanation coal dust gravity Pa and the length of spring compressed power Pg is how to realize recording pulverized coal flow.With in the power boiler breeze preparation system, mounting spring formula lock gas flow monitoring device is that example explains this device is how to measure back the powder flow on the mill separator powder retrieving pipe below.When mill separator has back powder, Hui Fenhui falls the top of plain batton door, when the powder position on plain batton door top surpasses sealing powder position height, because the gravity on top is greater than the elastic force of compression spring, plain batton door is pressed off, and the Hui Fenliang that exceeds sealing powder position height is passed through, and appoints Hui Fenliang how to change, this device maintains the existence of sealing powder position forever, thereby plays the effect of lock gas.During the assembling of this device, length of spring compressed power Pg with plus-minus screw handwheel 10 adjustment compression springs 7 makes plain batton door 1 just in time be in closed condition, according to principle of moment balance Pg * L2=Pa * L1 is arranged, Pa in the equation, L1, L2 are known, so can obtain length of spring compressed power Pg=Pa * L1/L2; According to spring Hooke's law Pa is arranged in elastic range again: Pa1=Δ Ha: Δ Hg1, Pa in the formula: the gravity that is plain batton door coal dust side when being in closed condition; Δ Ha: be plain batton door compression of spring deflection when being in closed condition; Pa1: be that plain batton door is in and artificially withstands plain batton door temporarily and do not allow it open, manually above the sealing powder position, add a certain amount of coal dust weight Pa1 again; Δ Hg1: be to make the compress variation Δ Hg1=Pa/Pa1/ Δ Ha that spring is increased when increasing coal dust weight Pa1 on the plain batton door, these parameters are known number.Remove artificial interim participation amount this moment, plain batton door will be opened, the coal dust weight Pa1 that adds after allowing flows out, record plain batton door by closed condition to opening, the time t that when open mode returns to closed condition, is write down again, thus we just to obtain the compression of spring degree be that the powder flow that returns at Δ Ha+ Δ Hg1 place is Pa1 * t, just can flow scale be asked in view of the above to carve by proportional relationship.
Pipeline is kept apart with the sealing coal dust in two different pressures districts up and down, realize the function that to carry and to have lock gas and monitoring flow continuously of this device.When the air quantity of control blower fan can only offer up-to-standard coal dust and carries out coal mill, the Hui Fenliang of powder retrieving pipe will be a zero flow, and this makes the control of blower fan that the data foundation arranged, and blower fan is carried out energy-conservation adjusting.Moreover, return boiler coal-ash preparation and combustion systems and bring a lot of benefits, reduced, can reduce the caliber of delivery duct as the ventilation volume of pulverized coal preparation system, inferior-quality meal returns powder not to have been had, can alleviate the wearing and tearing of equipment and pipeline, the power reduction of blower fan, lower-powered blower fan can be selected, reduced the air quantity that carries meal, make and carry the concentration of primary mixture to increase greatly, this is for the spray burner of combustion systems, has enough coal powder densities and coal dust is caught fire easily and steady combustion.The present invention is directed to different use objects, also can obtain corresponding benefit.
Claims (3)
1, a kind of by low pressure zone when another high pressure district ducting coal dust (material), gas channelling phenomenon can not take place, have the lock airway dysfunction, also possess the plate door spring air locking flow monitoring device that the monitoring pulverized coal flow has dual-use function simultaneously.
2, according to claim 1, described plate door spring air locking flow monitoring device, it is characterized in that: form by plain batton door (1), door bar axle (2), gear (3), straight gear (4), measuring pulley (5), pressure spring plate (6), compression spring (7), flux scale meter (8), spring spool (9), plus-minus screw handwheel (10), support (11), housing (12), inspection door (13) parts.Compression spring according to Hooke's law work, realizes that plate door spring air locking flow monitoring device can have the lock airway dysfunction by continuous pulverized coal conveying (material) in elastic range.
3, according to claim 1, with 2, described plate door spring air locking flow monitoring device, moment shell according to coal dust (material) gravitational moment and spring always keeps equilibrium relation, and compression spring in elastic range according to the Hooke's law work principle, can measure the flow of coal dust (material), show the variation of electric potential signal simultaneously by the bipotential device of installing on measuring pulley (5) axle, transmitter transfers electric potential signal to current signal and is sent to distant place control panel, and then revert to electric potential signal, and according to the corresponding relation between potential change and coal dust (material) weight rate, show with the weight rate scale, realize on the spot obtaining the monitoring flow results that can check one against another simultaneously with a distant place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510127707XA CN100509589C (en) | 2005-12-05 | 2005-12-05 | Plate door spring air locking flow monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510127707XA CN100509589C (en) | 2005-12-05 | 2005-12-05 | Plate door spring air locking flow monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1792748A true CN1792748A (en) | 2006-06-28 |
| CN100509589C CN100509589C (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510127707XA Active CN100509589C (en) | 2005-12-05 | 2005-12-05 | Plate door spring air locking flow monitoring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936539A (en) * | 2010-09-30 | 2011-01-05 | 孙家鼎 | Tensile powder feeder |
| CN105270869A (en) * | 2014-06-09 | 2016-01-27 | 南通慧源塑胶有限公司 | Negative-pressure feeding device |
| CN109297535A (en) * | 2018-09-27 | 2019-02-01 | 国网河北省电力有限公司电力科学研究院 | Station boiler Coal-pulverizing Systems with Ball Mill returns powder monitoring device |
-
2005
- 2005-12-05 CN CNB200510127707XA patent/CN100509589C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936539A (en) * | 2010-09-30 | 2011-01-05 | 孙家鼎 | Tensile powder feeder |
| CN105270869A (en) * | 2014-06-09 | 2016-01-27 | 南通慧源塑胶有限公司 | Negative-pressure feeding device |
| CN109297535A (en) * | 2018-09-27 | 2019-02-01 | 国网河北省电力有限公司电力科学研究院 | Station boiler Coal-pulverizing Systems with Ball Mill returns powder monitoring device |
| CN109297535B (en) * | 2018-09-27 | 2020-10-09 | 国网河北省电力有限公司电力科学研究院 | Powder return monitoring device of storage type powder making system in power station boiler steel ball mill |
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| Publication number | Publication date |
|---|---|
| CN100509589C (en) | 2009-07-08 |
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Owner name: BEIJING HUATAI MEIJING TECHNOLOGY DEVELOPMENT CO., Free format text: FORMER OWNER: SUN JIADING Effective date: 20121019 |
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Effective date of registration: 20121019 Address after: 100025, A, block 56, Ocean International Center, No. 407 East Fourth Ring Road, Beijing, Chaoyang District Patentee after: BEIJING HITECVISION SCIENCE TECHNOLOGY DEVELOPMENT CO.,LTD. Address before: 100025 Beijing city Chaoyang District village in eight, the ocean floor space 57 4-301 Patentee before: Sun Jiading |
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Address after: No. 2574, Room 101, 9th Floor, Building 19, Zone 16, No. 188 South Fourth Ring West Road, Fengtai District, Beijing, 100073 Patentee after: Integrated International Energy Technology Group Co.,Ltd. Country or region after: China Address before: Room 407, Block A, Ocean International Center, No. 56, Middle East Fourth Ring Road, Chaoyang District, Beijing 100025 Patentee before: BEIJING HITECVISION SCIENCE TECHNOLOGY DEVELOPMENT CO.,LTD. Country or region before: China |
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