CN202731649U - Hot air isolation door for thermal power station coal mill - Google Patents
Hot air isolation door for thermal power station coal mill Download PDFInfo
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- CN202731649U CN202731649U CN2012204009209U CN201220400920U CN202731649U CN 202731649 U CN202731649 U CN 202731649U CN 2012204009209 U CN2012204009209 U CN 2012204009209U CN 201220400920 U CN201220400920 U CN 201220400920U CN 202731649 U CN202731649 U CN 202731649U
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- thermal power
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Abstract
The utility model discloses a hot hair isolation door for a thermal power station coal mill. The hot air isolation door for the thermal power station coal mill comprises an air flue door body, a door frame, door sheets and a driving mechanism. A buffer device is arranged on the driving mechanism, and a sealing device is arrange on the door frame and the door sheets. A soot blowing mechanism is arranged at an inner side of a bottom side of the door frame. The hot air isolation door for the thermal power station coal mill cleverly combines the soot blowing mechanism, a four-bar linkage transmission mechanism, the buffer device and an omega-shaped rigidity seal technology into a whole so as to resolve the problem that the hot air isolation door deforms locally, the hot air isolation door can not be closed tightly due to soot formation and leads to inner leakage, and the connection between the hot air isolation door and a pipeline get loosen and leads to outer leakage. Therefore, potential safety hazard can be eliminated. The hot hair isolation door for the thermal power station coal mill has the advantages of being simple in structure, convent to operate, safe and reliable, high in intelligence, easy to install, convenient to maintain, long in service life, high in reliability, good in safety, strong in practicability and capable of producing good economic benefit and social effect.
Description
Technical field
The utility model relates to a kind of thermal power station coal pulverizer equipment, is specifically related to a kind of thermal power station coal pulverizer inlet place that is installed in and is 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 are low, easy to operate as rough type equipment, but have also that main mill part is easy to wear, equipment overhaul cycle short, the repair time long, can not with the shortcomings such as boiler maintenance is synchronous.Because coal pulverizer powder process ability direct relation exerting oneself of generating set, so the power station guarantees the reliability and security of unit operation by the Redundancy Design of medium-speed pulverizer.
The coal pulverizer isolation door is as the main xegregating unit of coal pulverizer and steam generator system, and it is extremely important to seem in system.Isolation door must reliably be opened when coal pulverizer puts into effect, and isolation door must safety be isolated when coal pulverizer is in for subsequent use or overhaul, and the open and close of isolation door are had the regular hour requirement.Because the residing operating temperature of isolation door high (about 350 ℃), duct cross-section are large, stressed large, the leakproofness of closing simultaneously, reliability requirement height, the isolation door that use in therefore domestic power station does not all reach desirable condition of work, and this operation to the power station coal pulverizer, maintenance all are very large potential safety hazards.
Existing overturn type insulation gate mainly is comprised of air channel, doorframe, door-plate and driving mechanism.Be provided with weather strip between around door-plate and the doorframe, behind the instruction issuing of closing the door, the driving mechanism action, door-plate compresses doorframe disk root weather strip and realizes the isolated of high-temperature hot-air, reduces the temperature in the coal pulverizer.Can realize on its system's constitution theory that the automation of hot air isolating door closes, but practical application still has following shortcoming:
The one, the impact force of closing the door causes packing_seal bar distortion large and fragmentation loses sealing function greatly easily.(damping of bounce cylinder is little owing to door-plate deadweight, cylinder thrust and air-flow high-speed motion three effect form impulse inertia, it is inadequate again to change cylinder strength of action less than normal), door-plate is large to the stamping press of doorframe at closing time, cause the crimp of packing_seal bar serious even broken, lose sealing function, leak in producing.
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.Same 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 local distortion even the cracking of doorframe or door-plate to lose sealing function, produce interior leakage; And long-term air channel vibration also can make isolation door be connected with line seal to become flexible, cause to 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.Because the judgement inaccuracy to hot blast operating mode in the air channel, wrong when design gate bottom blowing ash mode, function is not good enough, it is not thorough to blow ash, make on the underframe of doorframe and the corner, underframe both sides along the thicker formation layer of dust stratification ash, add that at closing time the door-plate closure comparatively fast has little time to utilize the 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 the triangle spatial domain after the door-plate closure, leak in producing.
The 4th, the application life of packing_seal is short.The elasticity of packing bar and flexible poor, frangible is easily aging under the high temperature.
The utility model content
Goal of the invention: for the deficiencies in the prior art, the purpose of this utility model provides 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, satisfy power station routine use demand.
Technical scheme: in order to realize the foregoing invention purpose, the technical solution adopted in the utility model is as follows:
A kind of thermal power station coal pulverizer hot air isolating door comprises air channel door body, doorframe, door-plate and driving mechanism; Be provided with buffer at described driving mechanism; Be provided with sealing device at described doorframe and door-plate; Be provided with the soot blower structure in inboard, described doorframe base.
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 links to each other with the cylinder head that drives cylinder, described damping headstock two ends link to each other with the piston rod that drives cylinder with quadric chain respectively, and described damping spring is sleeved on the damping device.
Described soot blower structure comprises tube chamber and the valve that is provided with mouthpiece, and described tube chamber links to each other with valve.
Described sealing device comprises the hard sealing of the Ω shape that is used in conjunction with each other and circumferential slot; Described Ω shape is hard to be sealed around the door-plate that is located between doorframe and door-plate adjacent surface; Described circumferential slot be located at doorframe around, Ω shape sealed in the central embedded groove of circumferential slot firmly when door-plate and doorframe were fitted.
Beneficial effect: compared with prior art, the utility model thermal power station 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 to leak in the imprecision of closing the door and is connected with pipeline and become flexible the phenomenon that leaks outside, eliminated potential safety hazard.Have the advantages such as degree simple in structure, easy to operate, safe and reliable, intelligent is high, installation is easy, maintenance facility, long service life.Also have simultaneously the characteristics such as reliability height, safety be good, practical, can produce good economic benefit and social effect.
Description of drawings
Fig. 1 is thermal power station's coal pulverizer hot air isolating door closure state schematic diagram;
Fig. 2 is the structural representation of thermal power station's coal pulverizer hot air isolating door;
Fig. 3 is thermal power station's coal pulverizer hot air isolating door opening schematic diagram.
The specific embodiment
Such as Fig. 1, Fig. 2 and shown in 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 the cross section rectangular duct, and its two ends are respectively air intake 8 and air outlet 9; Doorframe 2 is fixed on an end of the air outlet 9 of air channel door body 1 with certain angle; Door-plate 3 places doorframe 2 inboards, the top of the top of door-plate 3 and doorframe 2 is hinged, and door-plate 3 covered and is pressed on the doorframe 2 when door-plate 3 was fitted with doorframe 2, the hard sealing 10 of Ω shape is arranged around between the adjacent surface of doorframe 2 and door-plate 3, on another proximal surface corresponding with the hard sealing of this Ω shape 10 circumferential slot 11 is arranged, the hard sealing 10 of Ω shape was in the central embedded groove of circumferential slot 11 when door-plate 3 was fitted with doorframe 2; Air intake 8 one ends of air channel door body 1 and air outlet 9 one ends top is 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 inboards has through hole 14; Quadric chain 5, buffer 6 and drive that cylinder 7 is in safe key seat 12 and fixedly between the key seat 13, quadric chain 5 central authorities are connected on the door body 1 upper arm outside, air channel by steering base 15, the upper end of quadric chain 5 with drive cylinder 7 one end pin joints together, it is hinged with door-plate 3 external surfaces that described through hole 14 is passed in the lower end of quadric chain 5; Drive the other end of cylinder 7 and fixing 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 the part of quadric chain 5.Soot blower structure 4 is for being covered with at a certain angle tube chamber 20 and valve 21 composite sets of mouthpiece 19, and it is inboard that 4 accumbency of soot blower structure are connected to doorframe 2 bases; Under door-plate 3 openings, an arm of quadric chain 5 is fixed on the safe key seat 12 by safety pin and safe pin-and-hole 22, and it is unimpeded to implement hot-blast pipe line.
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, the action of switch board guiding driving cylinder, and piston rod retraction, effect quadric chain promote door-plate and rotate and the doorframe applying, compress, and be airtight, cuts off, and realizes hot air isolating.
Isolation door is opened: open command is assigned, and the switch board guiding drives the cylinder action, and piston rod stretches out, and effect quadric chain pulling door-plate upwards rotates and separates with doorframe, and leaves standstill with the paired angular dependence of doorframe, and the air channel is unimpeded, realizes the hot blast directed flow.
Buffering is with airtight: the inertia that impacts from great gentle cylinder owing to door-plate in the process of closing the door, add the pressure of thermal current in the airduct, door-plate is large to the instantaneous stamping power of doorframe, cause the crimp of packing_seal bar serious even fragmentation and doorframe door-plate local distortion, lose sealing function, leak in producing.For overcoming this shortcoming, at first be to slow down instantaneous stamping power.Principle is to increase buffer in linkage transmission, 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 to implant Ω shape rod between the adjacent steel face, 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 the ash action: soot blower is the airtight servicing unit of closing the door, and is used for keeping grey along not forming layer on door frame bottom and the corner, underframe both sides, and the operating mode face is even when making the door-plate doorframe closed, is beneficial to airtight; Open under its normality, flow media is power station compressed air, by being installed in the external valve control of air channel door.
The utility model 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. thermal power station's 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: be provided with buffer (6) at described driving mechanism; Be provided with sealing device at described doorframe (2) and door-plate (3); Be provided with soot blower structure (4) in described doorframe (2) inboard, base.
2. thermal power station according to claim 1 coal pulverizer hot air isolating door, it is characterized in that: described driving mechanism is four jointed gear units (5), drives by driving cylinder (7); Described buffer (6) is comprised of damping device (16), damping spring (17) and damping headstock (18), described damping device (16) links to each other with the cylinder head that drives cylinder (7), described damping headstock (18) two ends link to each other with the piston rod that drives cylinder (7) with quadric chain (5) respectively, and described damping spring (17) is sleeved on the 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) links to each other with valve (21).
4. thermal power station according to claim 1 coal pulverizer hot air isolating door, it is characterized in that: described sealing device comprises that the Ω shape that is used in conjunction with each other seals (10) and circumferential slot (11) firmly; Described Ω shape firmly seal (10) be located between doorframe (2) and door-plate (3) adjacent surface door-plate (3) all around; Described circumferential slot (11) be located at doorframe (2) around, Ω shape sealed (10) firmly in the central embedded groove of circumferential slot (11) when door-plate (3) and doorframe (2) were fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204009209U CN202731649U (en) | 2012-08-14 | 2012-08-14 | Hot air isolation door for thermal power station coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204009209U CN202731649U (en) | 2012-08-14 | 2012-08-14 | Hot air isolation door for thermal power station coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202731649U true CN202731649U (en) | 2013-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204009209U Expired - Lifetime CN202731649U (en) | 2012-08-14 | 2012-08-14 | Hot air isolation door for thermal power station coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202731649U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643789A (en) * | 2018-07-11 | 2018-10-12 | 深圳市龙电兴业科技有限公司 | A kind of novel closed door and window structure and door and window |
-
2012
- 2012-08-14 CN CN2012204009209U patent/CN202731649U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643789A (en) * | 2018-07-11 | 2018-10-12 | 深圳市龙电兴业科技有限公司 | A kind of novel closed door and window structure and door and window |
| CN108643789B (en) * | 2018-07-11 | 2024-02-23 | 深圳市龙电兴业科技有限公司 | Airtight door and window structure and door and window |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 225600 Tang Zhuang Town, Yangzhou City, Jiangsu, Gaoyou Patentee after: Yangzhou Longxin Technology Co.,Ltd. Address before: 225645, No. 2 North Street, Tang Zhuang Town, Yangzhou City, Jiangsu Province, Gaoyou Patentee before: YANGZHOU LONGXIN MACHINERY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |