CN205561622U

CN205561622U - Setting is at articulated type elastic sealing device of air preheater cold junction

Info

Publication number: CN205561622U
Application number: CN201521008082.0U
Authority: CN
Inventors: 刘勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-07
Filing date: 2015-12-07
Publication date: 2016-09-07
Anticipated expiration: 2025-12-07

Abstract

The utility model relates to a boiler equipment technical field, concretely relates to setting is at articulated type elastic sealing device of air preheater cold junction. The utility model provides a setting is at articulated type elastic sealing device of air preheater cold junction, include and set up the articulated type clamp plate of connecting through the connecting plate on one side of the partition panel, articulated type clamp plate and shaft liner connection, fixed part and contactor one side fixed connection on the axle sleeve, the second shaft hole on the axle sleeve and the first shaft hole fixed connection of articulated type clamp plate, the contactor opposite side is connected with the cab apron contact nature of crossing of sector plate, fixed part and articulated type clamp plate fixed connection, the secondary shaft is downthehole through the round pin axle, spring and plunger and articulated type clamp plate fixed connection, the second shaft hole outside is equipped with the screw, the spring is the torsional spring, the one end of torsional spring is installed at the round pin epaxially, graphite powder and sealed powder be equipped with between torsional spring and the round pin axle, plunger and second shaft hole are the seal structure that screws. The utility model discloses effective control leakage rate of air preheater send from reducing, draught fan power consumption and improve two aspects of boiler efficiency and obtain energy -conserving incomes.

Description

A kind of articulated type elastic sealing device being arranged on the cold end of air preheater

Technical field

The utility model relates to boiler plant technical field, particularly relates to a kind of articulated type bullet being arranged on the cold end of air preheater Property sealing device.

Background technology

In prior art, rotary regenerative air preheater is generally used on big-and-middle-sized station boiler, and air leak rate of air curtain is that it is important One of economic indicator.Effectively control air leak rate of air preheater, can give from reduction, air-introduced machine power consumption and improve boiler efficiency Two aspects obtain energy saving profit.Reasons of air leakage is because between sound the gap of reserved dilatancy generation and causes, therefore bullet Property contact to seal be to administer the preferred option leaked out.

Air preheater air leakage reason: rotor realizes the heat exchange between flue gas and air, rotor radial by heat exchange element when rotating Installing apex seal on dividing plate, be the most also to install diaphragm seal, bottom apex seal and bottom fanning strip, top is radially Diaphragm seal and top fanning strip, axial seal sheet and arc, they respectively in hot operation contact keep very small distance, Owing to these gaps of hot irregular deformation will form leaking out of flue gas and air, controlling this air leak rate of air curtain is national to carry thermal power plant Going out one of energy-saving and emission-reduction project, reasons of air leakage is because between sound the gap of reserved dilatancy generation and causes, thus reasoning Administering leaks out, and must to use sound good contact be most effective measure.

A kind of contact Sealing Technology that China uses fanning strip to be the sealing strip on mobile contact radially partition panel, after 2000 Specialty air preheater seal reconstruction producer of China is developed to Shi Duojia: flexible contact type similar sealed product producer and rushes on like a swarm of hornets, brush The Sealing Technologies such as formula sealing, leading-type sealing, hinge-type hinge structural formula introduce market, have respective patented technology, this A little producers are nearly all to design, due to limitation and each producer patent of scope of design according to contact resilient Seal Design theory The protection that technology requires causes a lot of product to there is part design defect affects benefit and the quality standard of product.

The sealing of China and outside China air preheater adjusts main according to rotary regenerative air preheater operational factor, precomputes hot The mushroom deflection of lower rotor part, reserves certain swollen when installing diaphragm seal with fanning strip, arc, bypass seal parts Bulk, during to ensure cold operation and hot operation, mushroom deformation is to reach optimal sealing state.Traditional Sealing Technology is equal Use the hard diaphragm seal of rigidity as sealing medium, owing to the calculating of seal clearance and adjustment yet suffer from error, fanning strip and close Certain leakage-gap is still suffered between mounting.And the existence of seal clearance necessarily causes flying dust to wash away diaphragm seal, along with The passage of time, the serious wear of diaphragm seal, air leak rate of air curtain progressively strengthens, and economical operation and maintenance to power plant also result in the biggest Burden.

Chinese patent CN104791482A discloses a kind of air preheater and cold end sealing device axially or radially, this sealing Structure includes that sealing plate in the form of sheets, described sealing plate are to be protected flaggy by leeward side protection board, intermediate seal plate and weather Folded stepped construction, and any side of leeward side protection board and weather protection board is respectively provided with one section of bending section, at the back of the body After wind side protection board and weather protection board stacking, two sections of bending sections are respectively positioned on the homonymy of sealing plate, and the bending of two bending sections In opposite direction, two bending sections constitute one along the outside V-arrangement bayonet socket of sealing plate length direction and opening direction, described in Between sealing plate part be positioned in V-arrangement bayonet socket, and the free end end of the intermediate seal plate stretched out by V-arrangement bayonet socket is positioned at V-arrangement Outside bayonet socket；It discloses a kind of air preheater using above sealing structure simultaneously.But, this patent can not be fully solved and carry , there is sealing device and can not well merge with air preheater internal structure in the problem of high air leak rate of air curtain, ensures again to set the while of reaching energy-conservation The purpose of standby safe and stable operation.

Utility model content

In order to overcome defect of the prior art, a kind of articulated type elasticity being arranged on the cold end of air preheater that the utility model provides Sealing device and air preheater internal structure can well merge, and reduce the overall air leak rate of air curtain of air preheater；Equipment property safe and reliable to operation, Reduce cost and ensure equipment safe and stable operation, improving power plant safety and the benefit of economy.

The utility model is achieved by the following technical solution: a kind of articulated type elastic packing dress being arranged on the cold end of air preheater Putting, described articulated type elastic sealing device includes being arranged on the articulated type pressing plate that partition panel side is connected by connecting plate, described Articulated type pressing plate is connected with axle sleeve, and the fixed part on described axle sleeve is fixing with contactor side to be connected, second on described axle sleeve Axis hole is fixing with the first axis hole of articulated type pressing plate to be connected, and the opposite side of described contactor connects with the rebound contact of fanning strip Connect.

Further, described fixed part connects by screw and articulated type pressing plate are fixing.

Further, it is connected by bearing pin, spring and plunger are fixing with the first axis hole of articulated type pressing plate in described second axis hole, It is provided with screw outside described second axis hole to be connected with pivot pin.

Further, described spring is torsion spring, and one end of described torsion spring is arranged on bearing pin, fills between described torsion spring and bearing pin Having graphite powder and sealing powder, described sealing powder is molybdenum disulphide powder.

Further, described plunger and the second axis hole are screwing hermetic structure.

Compared with prior art, superior effect is: the utility model can effectively control air leak rate of air preheater, from fall Low give, air-introduced machine power consumption and improve two aspects of boiler efficiency and obtain energy saving profit.

Accompanying drawing explanation

Fig. 1 is the detonation configuration schematic diagram of the articulated type elastic sealing device being arranged on the cold end of air preheater described in the utility model；

Fig. 2 is the mounting structure schematic diagram of the articulated type elastic sealing device being arranged on the cold end of air preheater described in the utility model.

Reference is as follows:

1-partition panel, 2-connecting plate, 3-contactor, 4-plunger, 5-axle sleeve, 6-articulated type pressing plate, 7-bearing pin, 8-spring, 9-rebound, 10-fanning strip, 11-the first axis hole, 12-the second axis hole, 13-fixed part, 14-screw.

Detailed description of the invention

Below in conjunction with the accompanying drawings the utility model detailed description of the invention is described in further detail.

As shown in Figure 1-2, a kind of articulated type elastic packing being arranged on the cold end of air preheater that the utility model provides is illustrated Device, including being arranged on the articulated type pressing plate 6 that partition panel 1 side is connected by connecting plate 2, described articulated type pressing plate 6 One end is connected with axle sleeve 5, and the fixed part 13 on described axle sleeve 5 is fixing with the side of contactor 3 to be connected, described axle sleeve 5 On the first axis hole 11 of the second axis hole 12 and articulated type pressing plate 6 fixing is connected, the opposite side of described contactor 3 and sector Rebound 9 contact on plate 10 connects, and described fixed part 13 is fixed connected by screw and contactor 3, and described second Fixed with the first axis hole 11 of articulated type pressing plate 6 by bearing pin 7, spring 8 and plunger 4 in axis hole 12 and is connected, described the It is provided with screw 14 outside two axis holes 12 to be connected with pivot pin 7, is reconciled by the contact position of adjustment screw 14 with pivot pin 7 The torque magnitude that joint seals, described spring 8 is torsion spring, and one end of described torsion spring is arranged on bearing pin 7, rotates screw The size of 14 regulation torsion spring torsion, equipped with graphite powder and sealing powder between described torsion spring and bearing pin 7, described sealing powder is two Sulfuration molybdenum powder, on the one hand plays lubrication, on the one hand plays gaseous state and enters the sealing function of bearing pin 7, is effectively controlled Due to after denitration air preheater cold end cold end corrosion and affect the validity of elastic packing, described plunger 4 with the second axis hole 12 is Screwing hermetic structure.

The articulated type elastic sealing device being arranged on the cold end of air preheater that the utility model provides, by synthesis metal material precision casting Making and form, do not have welding position, this sealing belongs to elasticity, in order to avoid spring 8 is due to the low temperature of the cold end of preheater empty after denitration Corrosion and scaling causes spring base to reduce impact elasticity, and spring 8 is concealed, and eliminates at air preheater in structure design Ensure that in the case of running environment inclement condition that the most stuck or spring is washed away etc. the major injury caused by burn into soot blower existing As.Effectively control the Elastic Contact of product, mainly consider to reduce and fanning strip 10 is reduced abrasion and articulated type contactor The agility changed, including the low cost cost of material, reaches energy-conservation purpose.Contactor 3 uses spheroidal graphite cast-iron to be base material Synthesizing new material hot investment casting form, reduce friction system according to the material characteristic changing its material and fanning strip 10 Number so that while reducing with fanning strip 10 friction, add service life.

The utility model is not limited to above-mentioned embodiment, in the case of without departing substantially from flesh and blood of the present utility model, and ability Field technique personnel it is contemplated that any deformation, improve, replace and each fall within protection domain of the present utility model.

Claims

1. the articulated type elastic sealing device being arranged on the cold end of air preheater, it is characterised in that described articulated type elastic packing Device includes being arranged on the articulated type pressing plate (6) that partition panel (1) side is connected, described articulated type pressure by connecting plate (2) Plate (6) is connected with axle sleeve (5), and the fixed part (13) on described axle sleeve (5) is fixing with contactor (3) side to be connected, The second axis hole (12) on described axle sleeve (5) is fixing with first axis hole (11) of articulated type pressing plate (6) to be connected, described The opposite side of contactor (3) is connected with rebound (9) contact of fanning strip (10).

It is arranged on the articulated type elastic sealing device of the cold end of air preheater the most according to claim 1, it is characterised in that described Fixed part (13) connects by screw and contactor (3) are fixing.

It is arranged on the articulated type elastic sealing device of the cold end of air preheater the most according to claim 1, it is characterised in that described By bearing pin (7), spring (8) and plunger (4) and first axis hole (11) of articulated type pressing plate (6) in second axis hole (12) Fixing connection, described second axis hole (12) outside is provided with screw (14) and is connected with pivot pin (7).

It is arranged on the articulated type elastic sealing device of the cold end of air preheater the most according to claim 3, it is characterised in that described Spring (8) is torsion spring, and one end of described torsion spring is arranged on bearing pin (7), equipped with stone between described torsion spring and bearing pin (7) Ink powder and sealing powder, described sealing powder is molybdenum disulphide powder.

It is arranged on the articulated type elastic sealing device of the cold end of air preheater the most according to claim 3, it is characterised in that described Plunger (4) and the second axis hole (12) are screwing hermetic structure.