CN103590723A - Hot air isolating door of thermal power station coal mill - Google Patents
Hot air isolating door of thermal power station coal mill Download PDFInfo
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- CN103590723A CN103590723A CN201210287856.2A CN201210287856A CN103590723A CN 103590723 A CN103590723 A CN 103590723A CN 201210287856 A CN201210287856 A CN 201210287856A CN 103590723 A CN103590723 A CN 103590723A
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Abstract
The invention discloses a hot air isolating door of a thermal power station coal mill. The hot air isolating door comprises an air duct door body, a door frame, a door plate and a driving mechanism. The driving mechanism is provided with a buffering device, the door frame and the door plate are provided with sealing devices, and a soot blowing mechanism is arranged on the inner side of the bottom edge of the door frame. According to the hot air isolating door of the thermal power station coal mill, the soot blowing mechanism, a four-bar linkage transmission mechanism, the buffering device and an omega-shaped hard sealing technology are combined ingeniously, the problem that the door cannot be tightly closed and inner leakage is caused due to local deformation and soot accumulation of the hot air isolating door and outleakage is caused due to pipe connection looseness is solved well, and the potential safety hazard is eliminated. The hot air isolating door has the advantages of being simple in structure, convenient to operate, safe, reliable, high in intelligence, easy to install, convenient to maintain and long in service life and the like, simultaneously further has the advantages of being high in reliability, good in safety and high in practicality and can have extremely good economic benefit and social effect.
Description
Technical field
The present invention relates to a kind of thermal power station coal pulverizer equipment, be specifically related to a kind of thermal power station's coal pulverizer inlet place that is arranged on and be used for stopping that hot blast enters the isolation door of coal pulverizer.
Background technology
Along with the fast development of fired power generating unit, medium-speed pulverizer has replaced the main powder manufacturing apparatus that low speed coal mill becomes large-size thermal power plant.Medium-speed pulverizer has the advantages such as reduced investment, power consumption be low, easy to operate as rough type equipment, but also has the shortcomings such as main mill part is easy to wear, equipment overhaul cycle is short, the repair time is long, can not synchronize with boiler maintenance.Because coal pulverizer powder process ability direct relation exerting oneself of generating set, so power station guarantees the reliability and security of unit operation by the Redundancy Design of medium-speed pulverizer.
Coal pulverizer isolation door, as the main xegregating unit of coal pulverizer and steam generator system, seems extremely important in system.When coal pulverizer puts into effect, isolation door must reliable be opened, and when coal pulverizer, isolation door must safety isolation during in standby or maintenance, and the open and close of isolation door are had to regular hour requirement.Because the residing operating temperature of isolation door high (350 ℃ of left and right), duct cross-section are large, stressed large, leakproofness, the reliability requirement of closing high simultaneously, the isolation door that therefore domestic power station is used does not all reach desirable condition of work, and this is all a very large potential safety hazard to the operation of power station coal pulverizer, maintenance.
Existing overturn type insulation gate is mainly comprised of air channel, doorframe, door-plate and driving mechanism.Between the surrounding of door-plate and doorframe, be provided with weather strip, close the door after instruction issuing, driving mechanism action, door-plate compresses doorframe disk root weather strip and realizes the isolated of high-temperature hot-air, reduces the temperature in coal pulverizer.On its system constitution theory, can realize the automation of hot air isolating door and close, but practical application still has following shortcoming:
The one, the impact force of closing the door greatly easily causes that packing_seal bar distortion is large and fragmentation loses sealing function.Because door-plate deadweight, cylinder thrust and air-flow high-speed motion three effect form impulse inertia, (damping of bounce cylinder is little, change cylinder strength of action less than normal inadequate again), door-plate is large to the stamping press of doorframe at closing time, cause the crimp of packing_seal bar seriously even broken, lose sealing function, in producing, leak.
The 2nd, the impact force of closing the door causes greatly doorframe, door-plate local distortion to cause interior leakage and the large phenomenon that leaks outside that causes of air channel vibration.Equally because door-plate deadweight, cylinder thrust and air motion three effect form impulse inertia, door-plate to the impact of doorframe for a long time it, can cause that the local distortion of doorframe or door-plate is even ftractureed, lose sealing function, leakage in producing; And long-term air channel vibration also can make isolation door be connected with line seal to become flexible, cause and leak outside.
The 3rd, a not good enough ash that blows of bottom blowing ash Functional Design does not thoroughly cause the imprecision of closing the door, and reliability reduces.Due to the judgement inaccuracy to hot blast operating mode in air channel, wrong during soot-blowing mode at the bottom of design gate, function is not good enough, blow ash not thorough, make on the underframe of doorframe and corner, underframe both sides along the thicker formation layer of dust stratification ash, add that at closing time door-plate closure comparatively fast has little time to utilize high velocity air supercharging to blow ash, cause between the vertical frame in both sides, the both sides of door and frame prodelta clay grieshoch three, forming triangle spatial domain after door-plate closure, in producing, leak.
The 4th, the application life of packing_seal is short.The elasticity of packing bar and flexible poor, frangible, easily aging under high temperature.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art, the object of this invention is to provide a kind of thermal power station coal pulverizer hot air isolating door, with can switch freely, close tight, completely cut off, without leakage, high reliability and safety, be easy to automatic management, meet power station routine use demand.
Technical scheme: in order to realize foregoing invention object, the technical solution used in the present invention is as follows:
A coal pulverizer hot air isolating door, comprises air channel door body, doorframe, door-plate and driving mechanism; On described driving mechanism, be provided with buffer; On described doorframe and door-plate, be provided with sealing device; In described inner side, doorframe base, be provided with soot blower structure.
Described driving mechanism is four jointed gear units, by driving air cylinder driven, described buffer is comprised of damping device, damping spring and damping headstock, described damping device is connected with driving the cylinder head of cylinder, described damping headstock two ends are connected with the piston rod of driving cylinder with quadric chain respectively, and described damping spring is sleeved on damping device.
Described soot blower structure comprises tube chamber and the valve that is provided with mouthpiece, and described tube chamber is connected with valve.
Described sealing device comprises the hard sealing of the Ω shape being used in conjunction with each other and circumferential slot; The hard sealing of described Ω shape is located at the door-plate surrounding between doorframe and door-plate adjacent surface; Described circumferential slot is located at the surrounding of doorframe, and when door-plate and doorframe laminating, Ω shape seals in the central embedded groove of circumferential slot firmly.
Beneficial effect: compared with prior art, thermal power station of the present invention coal pulverizer hot air isolating door, soot blower structure, four jointed gear units, buffer and the hard Sealing Technology of Ω shape are combined cleverly, solve well hot air isolating door local distortion, dust stratification and caused in the imprecision of closing the door, to leak and is connected with pipeline and become flexible the phenomenon that leaks outside, eliminated potential safety hazard.There is the advantages such as simple in structure, easy to operate, safe and reliable, intelligent degree is high, installation is easy, maintenance facility, long service life.Also there is the features such as reliability is high, safety good, practical simultaneously, can produce good economic benefit and social effect.
Accompanying drawing explanation
Tu1Shi thermal power station coal pulverizer hot air isolating door closure state schematic diagram;
The structural representation of Tu2Shi thermal power station coal pulverizer hot air isolating door;
Tu3Shi thermal power station coal pulverizer hot air isolating door opening schematic diagram.
The specific embodiment
As shown in Figure 1, Figure 2 and Figure 3, thermal power station's coal pulverizer hot air isolating door, comprises air channel door body 1, doorframe 2, door-plate 3, soot blower structure 4, four jointed gear units 5, buffer 6 and drives cylinder 7.Air channel door body 1 is cross section rectangular duct, and its two ends are respectively air intake 8 and air outlet 9; Doorframe 2 is fixed on one end of the air outlet 9 of air channel door body 1 with certain angle; Door-plate 3 is placed in doorframe 2 inner sides, the top of the top of door-plate 3 and doorframe 2 is hinged, and when door-plate 3 is fitted with doorframe 2, door-plate 3 covers and is pressed on doorframe 2, between the adjacent surface of doorframe 2 and door-plate 3, surrounding has the hard sealing 10 of Ω shape, on another proximal surface corresponding with the hard sealing 10 of this Ω shape, have circumferential slot 11, when door-plate 3 is fitted with doorframe 2, the hard sealing 10 of Ω shape is in the central embedded groove of circumferential slot 11; Air intake 8 one end of air channel door body 1 and air outlet 9 tops, one end are separately installed with safe key seat 12 and fixing key seat 13, and air channel door body 1 upper wall of safe key seat 12 inner sides has through hole 14; Quadric chain 5, buffer 6 and driving cylinder 7 are in safe key seat 12 with fixedly between key seat 13, quadric chain 5 central authorities are connected on air channel door body 1 upper arm outside by steering base 15, the upper end of quadric chain 5 is together with driving cylinder 7 one end pin joints, and the lower end of quadric chain 5 is hinged through described through hole 14 and door-plate 3 external surfaces; The other end of driving cylinder 7 and fixedly key seat 13 pin joints; Buffer is comprised of damping device 16, damping spring 17 and damping headstock 18, and damping device 16 is installed on the cylinder head that drives cylinder 7, and damping headstock 18 is a part for quadric chain 5.Soot blower structure 4 is for being covered with at a certain angle tube chamber 20 and valve 21 combination units of mouthpiece 19, and 4 accumbency of soot blower structure are connected to doorframe 2 inner sides, base; Under door-plate 3 openings, an arm of quadric chain 5 is fixed on safe key seat 12 by safety pin and safe pin-and-hole 22, implements hot-blast pipe line unimpeded.
The course of work of this thermal power station's coal pulverizer hot air isolating door is as follows:
Isolation door is closed: out code is assigned, and switch board guiding drives cylinder action, piston rod retraction, and effect quadric chain promotes door-plate and rotates and doorframe laminating, compresses, airtight, cuts off, and realizes hot air isolating.
Isolation door is opened: open command is assigned, and switch board guiding drives cylinder action, and piston rod stretches out, and it is separated with doorframe that effect quadric chain pulls door-plate upwards to rotate, and standing with the paired angular dependence of doorframe, and air channel is unimpeded, realizes hot blast directed flow.
Buffering is with airtight: the inertia impacting from great gentle cylinder due to door-plate in the process of closing the door, add the pressure of thermal current in airduct, door-plate is large to the instantaneous stamping power of doorframe, cause the crimp of packing_seal bar seriously even fragmentation and doorframe door-plate local distortion, lose sealing function, in producing, leak.For overcoming this shortcoming, be first to slow down instantaneous stamping power.Principle is in linkage transmission, to increase buffer, utilizes the flexibility of its damping spring and rigidity to dissolve instantaneous stamping power, to reach flexible closed, the lasting compression of door-plate, eliminates vibration; Next is to change sealing means, and deliquescing is sealed into hard sealing.Principle is between adjacent steel face, to implant Ω shape rod, becomes firm linear sealing when the closed extruding of door-plate doorframe.Close every effect: airtight tight, isolated without leaking, reliable and secure, wear-resisting unification, without blow loss without coming off, long service life.
Blow ash action: soot blower is the airtight servicing unit of closing the door, be used for keeping grey along not forming layer on door frame bottom and corner, underframe both sides, while making door-plate doorframe closed, operating mode face is even, is beneficial to airtight; Under its normality, open, flow media is power station compressed air, by being arranged on the external valve of air channel door, controls.
The present invention is simple in structure, and design science is isolated tight, convenient operating maintenance safety; Manufacture easily, intelligent degree is high, can realize Long-distance Control.Be applicable to the hot air isolating of the medium-speed pulverizers such as thermal power station, cement plant, steel mill.
Claims (4)
1.Yi Zhong thermal power station coal pulverizer hot air isolating door, comprises air channel door body (1), doorframe (2), door-plate (3) and driving mechanism; It is characterized in that: on described driving mechanism, be provided with buffer (6); On described doorframe (2) and door-plate (3), be provided with sealing device; In inner side, described doorframe (2) base, be provided with soot blower structure (4).
2. thermal power station according to claim 1 coal pulverizer hot air isolating door, is characterized in that: described driving mechanism is four jointed gear units (5), by driving cylinder (7) to drive; Described buffer (6) is comprised of damping device (16), damping spring (17) and damping headstock (18), described damping device (16) is connected with driving the cylinder head of cylinder (7), described damping headstock (18) two ends are connected with the piston rod of driving cylinder (7) with quadric chain (5) respectively, and described damping spring (17) is sleeved on damping device (16).
3. thermal power station according to claim 1 coal pulverizer hot air isolating door, it is characterized in that: described soot blower structure (4) comprises tube chamber (20) and the valve (21) that is provided with mouthpiece (19), and described tube chamber (20) is connected with valve (21).
4. thermal power station according to claim 1 coal pulverizer hot air isolating door, is characterized in that: described sealing device comprises that the Ω shape being used in conjunction with each other seals (10) and circumferential slot (11) firmly; Described Ω shape firmly seals (10) and is located at door-plate (3) surrounding between doorframe (2) and door-plate (3) adjacent surface; Described circumferential slot (11) is located at the surrounding of doorframe (2), and when door-plate (3) is fitted with doorframe (2), Ω shape seals (10) firmly in the central embedded groove of circumferential slot (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210287856.2A CN103590723A (en) | 2012-08-14 | 2012-08-14 | Hot air isolating door of thermal power station coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210287856.2A CN103590723A (en) | 2012-08-14 | 2012-08-14 | Hot air isolating door of thermal power station coal mill |
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| CN103590723A true CN103590723A (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210287856.2A Pending CN103590723A (en) | 2012-08-14 | 2012-08-14 | Hot air isolating door of thermal power station coal mill |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064836A (en) * | 2015-08-29 | 2015-11-18 | 安徽康迪纳电力科技有限责任公司 | Improved door opening booster |
| CN105696919A (en) * | 2014-10-24 | 2016-06-22 | 庄景阳 | Control method of door plate with sealing plate |
| CN105735843A (en) * | 2014-10-24 | 2016-07-06 | 庄景阳 | Door sheet with sealing plate |
| CN105903538A (en) * | 2016-05-15 | 2016-08-31 | 江苏祥荣机械制造有限公司 | Novel high-elasticity double-sealing baffle door |
| CN109236149A (en) * | 2018-10-02 | 2019-01-18 | 盐城欧润石化设备制造有限公司 | A kind of choke water discharging valve |
| CN110630143A (en) * | 2019-10-23 | 2019-12-31 | 无锡市华通电力设备有限公司 | Hidden high-closed flap gate and using method thereof |
-
2012
- 2012-08-14 CN CN201210287856.2A patent/CN103590723A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696919A (en) * | 2014-10-24 | 2016-06-22 | 庄景阳 | Control method of door plate with sealing plate |
| CN105735843A (en) * | 2014-10-24 | 2016-07-06 | 庄景阳 | Door sheet with sealing plate |
| CN105064836A (en) * | 2015-08-29 | 2015-11-18 | 安徽康迪纳电力科技有限责任公司 | Improved door opening booster |
| CN105064836B (en) * | 2015-08-29 | 2016-08-17 | 安徽康迪纳电力科技有限责任公司 | The enabling booster improved |
| CN105903538A (en) * | 2016-05-15 | 2016-08-31 | 江苏祥荣机械制造有限公司 | Novel high-elasticity double-sealing baffle door |
| CN109236149A (en) * | 2018-10-02 | 2019-01-18 | 盐城欧润石化设备制造有限公司 | A kind of choke water discharging valve |
| CN110630143A (en) * | 2019-10-23 | 2019-12-31 | 无锡市华通电力设备有限公司 | Hidden high-closed flap gate and using method thereof |
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Application publication date: 20140219 |