CN204421054U

CN204421054U - A kind of air preheater cold and hot end fanning strip synchronous follow-up device

Info

Publication number: CN204421054U
Application number: CN201520076433.5U
Authority: CN
Inventors: 彭可
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-02-03
Filing date: 2015-02-03
Publication date: 2015-06-24
Anticipated expiration: 2025-02-03

Abstract

The utility model relates to a synchronous tracking device for the cold and hot end sector plates of an air preheater, which relates to a synchronous tracking device, in particular to a synchronous tracking device for the cold and hot end sector plates of an air preheater. The utility model aims to solve the problem that air leakage cannot be avoided in the reserved sealing gap between the rotor and the fan-shaped plate of the existing air preheater. The utility model includes an expansion mechanism, a first nut, a single-arm beam, a body support, a main shaft, an expansion joint, a connecting plate, a connecting pin, a fan-shaped plate at a hot end, a connecting rod, an arc-shaped plate, a second nut, a fan-shaped plate at a cold end and The third nut, the fan-shaped plate at the hot end is arranged above the rotor. The utility model is used on an air preheater.

Description

A kind of air preheater cold and hot end fanning strip synchronous follow-up device

Technical field

The utility model relates to a kind of synchronous follow-up device, is specifically related to a kind of air preheater cold and hot end fanning strip synchronous follow-up device, belongs to steam power plant field.

Background technology

Rotary regenerative air preheater utilizes the heat smoke that in thermal power plant, coal-burning boiler afterbody is discharged, and enters a kind of heat-exchange device of boiler auxiliary combustion, modern heavy duty boiler is used widely after being heated by cold air.Rotary regenerative air preheater is owing to there being rotatable parts, and rotor and have gap between fanning strip and rotor case, have larger pressure reduction between the air side of preheater and fume side, this just brings the problem that air leaks in flue gas, i.e. Air Leakage simultaneously.Leaking out of rotary regenerative air preheater can cause unit thermal drying poor, accelerates cold end corrosion process, reduces generatine set heat efficiency, increases ventilating machinary power consumption, boiler efficiency is reduced, and then affects the economic benefit of unit overall operation.At present along with the continuous increase of boiler capacity, rotary regenerative air preheater is also more and more large, and this problem such as make to leak out is more outstanding.The air leak rate of air curtain of rotary regenerative air preheater in design General Requirements is not more than 10%, but practical application is much 20 ~ 30%, sometimes even up to 40%.The main cause that rotary air preheater air leak is large is that rotor varies with temperature the irregular mushroom distortion of generation, causes the excesssive gap between rotor and fanning strip to cause.The size of air leak rate of air curtain weighs an important indicator of rotary regenerative air preheater technical merit.The problem that current solution is leaked out generally adopts rigid Sealing Technology, namely in advance by calculating hot shaping parameter, and reserved seal clearance.But because the distortion between rotor and fanning strip has certain angle, preset clearance can not be too small, otherwise be in operation and can produce clamping stagnation, can make to scratch between rotor and fanning strip, affect the normal operation of equipment; And a slot reservation is excessive, well can not seal again, make hot operating leaking out will be very large.

Utility model content

The utility model is the problem that the reserved seal clearance solved between the rotor of existing air preheater and fanning strip cannot avoid air leakage phenomena, and then proposes a kind of air preheater cold and hot end fanning strip synchronous follow-up device.

The utility model is the technical scheme taked that solves the problem: the utility model comprises expansion mechanism, first nut, single armed beam, body rack, main shaft, expansion joint, connecting plate, connecting pin, hot junction fanning strip, connecting rod, arc, second nut, cold end sector plate and the 3rd nut, hot junction fanning strip is arranged on the top of rotor, cold end sector plate is arranged on the below of rotor, described expansion mechanism is arranged on the upper surface of housing by body rack, the upper end of main shaft is connected with described expansion mechanism, the lower end of main shaft is connected with the upper end of connecting plate, the lower end of connecting plate is connected with hot junction fanning strip by connecting pin, the right-hand member of single armed beam is connected with described expansion mechanism, the left end of single armed beam is connected with the upper end of connecting rod by the first nut, connect dry lower end to be connected with cold end sector plate with the 3rd nut by the second nut, expansion joint is sleeved on connecting rod, and expansion joint is positioned at the outside of housing, arc is arranged between the madial wall of housing and rotor.

The beneficial effects of the utility model are: the utility model have effectively achieved two blocks of fanning strip synchronized tracking rotors thus makes in air preheater, static and dynamic sealing parts, there is good minimum sealing preset clearance, the air leak rate of air curtain of air preheater is made to drop to optimum value, improve the heat-exchange temperature of flue gas and First air, Secondary Air, the First air of high temperature carries coal dust and enters boiler, makes boiler more can improve heat production usefulness fully.Also reduce coal consumption, the utility model also serves the effect of energy-conserving and environment-protective simultaneously.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model.

Detailed description of the invention

Detailed description of the invention one: composition graphs 1 illustrates present embodiment, described in present embodiment, a kind of air preheater cold and hot end fanning strip synchronous follow-up device comprises expansion mechanism, first nut 1, single armed beam 17, body rack 18, main shaft 19, expansion joint 20, connecting plate 22, connecting pin 23, hot junction fanning strip 24, connecting rod 25, arc 27, second nut 28, cold end sector plate 29 and the 3rd nut 30, hot junction fanning strip 24 is arranged on the top of rotor 26, cold end sector plate 29 is arranged on the below of rotor 26, described expansion mechanism is arranged on the upper surface of housing 21 by body rack 18, the upper end of main shaft 19 is connected with described expansion mechanism, the lower end of main shaft 19 is connected with the upper end of connecting plate 22, the lower end of connecting plate 22 is connected with hot junction fanning strip 24 by connecting pin 23, the right-hand member of single armed beam 17 is connected with described expansion mechanism, the left end of single armed beam 17 is connected with the upper end of connecting rod 25 by the first nut 1, the lower end connecting dry 25 is connected with cold end sector plate 29 with the 3rd nut 30 by the second nut 28, expansion joint 20 is sleeved on connecting rod 25, and expansion joint 20 is positioned at the outside of housing 21, arc 27 is arranged between the madial wall of housing 21 and rotor 26.

Detailed description of the invention two: composition graphs 1 illustrates present embodiment, described in present embodiment, the expansion mechanism of a kind of air preheater cold and hot end fanning strip synchronous follow-up device comprises spindle jacket 2, side's annulate shaft 3, front square set 4, lift 5, travel switch 6, crank 7, casing 8, first upper pin 9, adjusting bolt 10, plain cushion 11, second upper pin 12, in connect inner tube connector 13, in connect interior pipe 14 and outer tube 15, rear pin shaft 16, casing 8 is arranged on body rack 18, outer tube 15 is horizontally disposed with, the left end of outer tube 15 is communicated with casing 8, in connect interior pipe 14 and be inserted in outer tube 15, in connect interior pipe 14 left end pass through in connect inner tube connector 13 and be connected with the right-hand member of interior pipe connecting plate, the left end of described interior pipe connecting plate is connected by the adjusting bolt 10 of the second upper pin 12 with crank 7 left end, plain cushion 11 is sleeved on the second upper pin 12, crank 7 is connected with the madial wall of casing 8 by the first upper pin 9, spindle jacket 2 passes vertically through casing 8, lift 5 is arranged on the upper end of spindle jacket 2, travel switch 6 is arranged on lift 5, the left end of crank 7 is connected with the lateral wall of spindle jacket 2 with front square set 4 by square annulate shaft 3, the right-hand member of single armed beam 17 is inserted in casing 8, in connect interior pipe 14 right-hand member be connected by the medial surface of rear pin shaft 16 with outer tube 15 right-hand member, the lower end of spindle jacket 2 is sleeved on the upper end of main shaft 19.Other composition and annexation identical with detailed description of the invention one.

Operation principle

By on casing 8 fixing machine body support frame 18, be welded on the upper surface of housing 21 bottom body rack 18, by in connect interior pipe 14, outer tube 15 linked together by rear pin shaft 16, be bolted on 8, by the first upper pin 9, second upper pin 12, crank 7 connected together.By outer tube 15 together with in connect interior pipe 14 and insert air preheater cigarette side, experience less than 400 DEG C temperature; In connect interior pipe 14, outer tube 15 is two kinds of different metals, be heated after in connect interior pipe 14, outer tube 15 produces different length variations.Outer tube 15 acts on casing 8, pulling force is produced to rear pin shaft 16 direction, same bearing pin 16 later drives pipe 14 in intermediary to pull crank 7, and with the first upper pin 9 for the center of circle, crank 7 side of drive annulate shaft 3, front square set 4, lift 5, single armed beam 17, main shaft 19, connecting plate 22, hot junction fanning strip 24, connecting rod 25, cold end sector plate 29 etc. synchronously decline.Rotor 26 also synchronously declines with the raw height of temperature.

Claims

1. A synchronous tracking device for the hot and cold end sector plates of an air preheater, characterized in that: the synchronous tracking device for the cold and hot end sector plates of an air preheater comprises an expansion mechanism, a first nut (1), a single arm Beam (17), machine body bracket (18), main shaft (19), expansion joint (20), connection plate (22), connection pin (23), hot end sector plate (24), connecting rod (25), arc Plate (27), second nut (28), cold end sector plate (29) and third nut (30), hot end sector plate (24) is arranged above the rotor (26), cold end sector plate (29) It is arranged below the rotor (26), the expansion mechanism is installed on the upper surface of the casing (21) through the body bracket (18), the upper end of the main shaft (19) is connected with the expansion mechanism, and the lower end of the main shaft (19) It is connected with the upper end of the connecting plate (22), the lower end of the connecting plate (22) is connected with the hot-end fan-shaped plate (24) through the connecting pin (23), and the right end of the single-arm beam (17) is connected with the expansion mechanism. The left end of the beam (17) is connected with the upper end of the connecting rod (25) through the first nut (1), and the lower end of the connecting stem (25) is connected with the cold end sector plate ( 29) connection, the expansion joint (20) is set on the connecting rod (25), and the expansion joint (20) is located on the outside of the shell (21), and the arc plate (27) is arranged on the inner wall of the shell (21) and between the rotors (26).

2. A synchronous tracking device for hot and cold end sector plates of an air preheater according to claim 1, characterized in that: the expansion mechanism includes a main shaft casing (2), a square ring shaft (3), and a front casing (4) , elevator (5), travel switch (6), crank (7), box (8), first upper pin (9), adjusting bolt (10), flat washer (11), second upper pin ( 12), connecting the inner pipe connecting piece (13), connecting the inner pipe (14) and the outer pipe (15), the rear pin (16), the box body (8) is installed on the body support (18), and the outer pipe (15) Set horizontally, the left end of the outer pipe (15) communicates with the box body (8), the middle connecting inner pipe (14) is inserted into the outer pipe (15), and the left end of the middle connecting inner pipe (14) passes through the middle connecting inner The pipe connector (13) is connected with the right end of the inner pipe connecting plate, the left end of the inner pipe connecting plate is connected with the adjusting bolt (10) at the left end of the crank (7) through the second upper pin (12), and the flat pad (11 ) is set on the second upper pin (12), the crank (7) is connected with the inner wall of the box (8) through the first upper pin (9), and the main shaft outer cover (2) passes through the box (8) vertically ), the elevator (5) is installed on the upper end of the main shaft casing (2), the travel switch (6) is installed on the elevator (5), and the left end of the crank (7) is connected to the main shaft through the square ring shaft (3) and the front sleeve (4). The outer wall of the overcoat (2) is connected, the right end of the single-arm beam (17) is inserted in the box (8), and the right end of the inner pipe (14) is connected to the right end of the outer pipe (15) through the rear pin (16) The inner surface of the main shaft is connected, and the lower end of the main shaft overcoat (2) is sleeved on the upper end of the main shaft (19).