CN207222051U - The special coal dust leakproof auxiliary device in power plant - Google Patents

Abstract

The utility model discloses the special coal dust leakproof auxiliary device in power plant, including the upper sealing mechanism installed in coal pulverizer cabin top and the lower sealing mechanism installed in coal pulverizer cabin lower part, the lower sealing mechanism includes being installed on the lower cylinder that cabin lower part coordinates with pull rod coaxial package, lower cylinder upper port is installed with the upper cylinder plate closed with drag link sleeve assembling, lower cylinder lower end oral area is connected with outwardly extending lower cylinder plate, hush panel is installed with by lower bolt on lower cylinder plate, the sealing closed with drag link sleeve assembling is equipped with the middle part of hush panel, the elastic ring body for making lower cylinder coordinate with the crush seal of pull rod elasticity is installed in lower cylinder by interior detent mechanism.Rational in infrastructure, sealing is tight, can with the slip of pull rod adjust automatically connection sealing, be not easy the coal that leaks out, leaks, installing and dismounting is simple, easy to maintenance, and helps to reduce cost.

Description

The special coal dust leakproof auxiliary device in power plant

Technical field

It the utility model is related to the special coal dust leakproof auxiliary device in power plant.

Background technology

Coal pulverizer is by coal crusher and wears into the machinery of coal dust, it is the important ancillary equipment of coal-powder boiler.According to work Mode point, there is the models such as vertical pulverizer, high-pressure overhang roll mill, middling speed micropowder grinding, super-pressure trapezoidal mill, Raymond mill；Work by coal-grinding The rotating speed of component can be divided into three types, i.e. low-speed coal mill, medium-speed pulverizer and high speed coal mill.

What the roller ring mill that Datang Linqing steam power plant now comes into operation designed for Beijing Electrical Equipment Factory II type coal pulverizers of ZGM95K-, grinding roller load mode become loading using hydraulic pressure, float cone cover and sealing air pair are used at loading pull rod , has often there is leakage powder phenomenon, coal-grinding is primarily due to through site inspection in resealing at hydraulic loading device tie-rod sealing since putting into operation The tie-rod sealing of machine manufactory design meets place using rigid seal and pull rod, fully relies on the pressure difference of sealing air and First air to hinder Only coal dust to External leakage, is just easy to cause rigid sealing ring when the first-class ironware of iron wire, welding rod is mingled with coal in mill Abrasion, a large amount of coal grains leak into the small interior of tie-rod sealing out of mill after seal clearance increase, gradually by bad seals under pull rod, lead Cause sealing air entrainment of coal dust from tie-rod sealing cell to pass through under pull rod to seal and leaks out outside coal pulverizer, due to the leakage of sealing air, The air quantity of sealing air, pressure start to reduce, and gradually cause to be leak into coal dust in other two tie-rod sealing rooms, accelerate other two The rate of wear of tie-rod sealing, the leakage of tie-rod sealing not only result in a large amount of coal dusts losses, pulverizer capacity reduces, pull rod The abrasion of sealing ring, the reduction of sealing air air quantity, pressure, also seriously polluted site environment, cause to have to stop mill maintenance, shadow The stability of boiler load is rung.At the same time because need to often replace rigid sealing ring after powder leakage caused by drag-link, disbursement is big；Coal pulverizer leaks Load fluctuation failure costs caused by powder, output reduce and stop mill is larger；Maintenance down expense and environmental cleanup labour cost are not Disconnected increase.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of rational in infrastructure, sealing is tight, can be with pull rod Slide and adjust automatically connection sealing, be not easy the coal that leaks out, leaks, installing and dismounting is simple, easy to maintenance, and helps to reduce cost The special coal dust leakproof auxiliary device in power plant.

In order to solve the above technical problems, the special coal dust leakproof auxiliary device in this power plant includes being installed on coal pulverizer cabin The upper sealing mechanism in portion and the lower sealing mechanism installed in coal pulverizer cabin lower part, it is structurally characterized in that：The lower sealing mechanism Including the lower cylinder coordinated installed in cabin lower part and pull rod coaxial package, lower cylinder upper port is installed with upper with drag link sleeve assembling conjunction Cylinder plate, lower cylinder lower end oral area are connected with outwardly extending lower cylinder plate, and hush panel is installed with by lower bolt on lower cylinder plate, seal The sealing closed with drag link sleeve assembling is equipped with the middle part of oralia, being provided with lower cylinder by interior detent mechanism makes lower cylinder be squeezed with pull rod elasticity The elastic ring body that means of press seals coordinates.

The special coal dust leakproof auxiliary device in this power plant is that rational in infrastructure, sealing is realized by squash type inner seal structure Tightly, it is not easy to leak out, leaks coal, installing and dismounting is simple, easy to maintenance, and helps to reduce cost.

Squash type inner seal structure mainly includes four part-structures, i.e.,：Lower cylinder, upper cylinder plate, lower cylinder plate, elastic ring body.Its In, lower cylinder is the housing parts of lower sealing mechanism, and the installation carrier of miscellaneous part.Lower cylinder is circular tube shaped, coaxial with pull rod Suit coordinates, and toroidal cavity is equipped between lower cylinder inner wall and pull rod outer wall.Lower cylinder upper end is connected with cylinder plate, is set in the middle part of upper cylinder plate There is the hole closed with drag link sleeve assembling, upper cylinder plate and pull rod are clearance fit, therefore pull rod can pass freely through cylinder plate.Under lower cylinder By being equipped with lower cylinder plate horizontal-extending laterally, lower cylinder plate bottom snap has hush panel, hush panel and corresponding lower cylinder plate at end Peripheral ring is equipped with some lower bolts, both pass through lower bolt fixed seal connection.Hush panel central part is equipped with the envelope of suit pull rod Mouthful, sealing diameter is much larger than pull rod outside diameter, in order to which pull rod is slightly radially swung.In this way, upper cylinder plate, lower cylinder, hush panel are just enclosed It has been coiled into the inner cavity of lower cylinder.In this patent, an elastic ring body, elastic ring are provided with by interior detent mechanism in lower tube inner chamber Internal wall is closed with the assembling of pull rod outer wall elastic seal cartridge, and elastic ring body outer wall coordinates with lower tube inner chamber wall elastic packing.Work as pull rod During axial movement, elastic ring body can synchronously be followed by elastic deformation to realize, have slight radial direction vibrations also can even if pull rod Absorbed by elastic ring body, therefore ensure that lower sealing mechanism neither leaks out nor leak coal or leakage powder.

As a kind of implementation, the interior detent mechanism include be installed on cylinder plate inner wall with pull rod gap package The upper cylinder ring coordinated, upper cylinder ring cross section is presented triangle sharp under width, is installed with hush panel inner wall and pull rod gap package The lower cylinder ring coordinated, lower cylinder ring cross section are in the triangle of lower wide upper point, are respectively equipped with the elastic ring body upper and lower ends face With the upper cylinder groove and lower cylinder groove of upper cylinder ring and the lower clamped cooperation of cylinder ring, the annular chamber between elastic ring body lateral wall and lower cylinder inner wall If inside it is evenly equipped with the spring that capable person's elastic ring body inner wall is expressed on pull rod.

As an improvement, elastic ring body top is equipped with two elastic arms corresponding with upper cylinder ring two side, i.e., interior upper elastic arm With outside upper elastic arm, together with the elastic fit of pull rod top, outside upper elastic arm pastes interior upper elastic arm with lower tube inner chamber wall lower part It is combined；Elastic ring body lower part is equipped with two elastic arms corresponding with lower cylinder ring two side, i.e., interior lower elastic arm and outer lower bullet Property arm, interior lower elastic arm fit together with pull rod lower elastic, and outer lower elastic arm fits together with lower tube inner chamber wall lower part.

Detent mechanism mainly includes five part-structures in this, i.e.,：Upper cylinder ring, upper cylinder groove, lower cylinder ring, lower cylinder groove and spring. Wherein, upper cylinder ring is installed on cylinder plate inner wall, in circular ring shape, is coordinated with pull rod gap package, width is presented in upper cylinder ring cross section Lower sharp triangle.For convenience of narration, three sides for forming above-mentioned triangle are referred to as the top affixed with upper cylinder plate inner wall Side or roof, close on the interior bevel edge of setting or interior skew wall with pull rod, and the outer bevel edge that lower medial wall of the tube is set is closed on away from pull rod Or outer skew wall.Obviously, should the groove of falling v-shaped as soon as skew wall constitutes the chamber of falling v-shaped groove wide under a upper point in pull rod outer wall and lower cylinder ring It is one of key structure of this patent.Lower cylinder ring is fixed on hush panel inner wall, and lower cylinder ring is also in circular ring shape, is covered with pull rod gap Assembling is closed, and lower cylinder ring cross section is in the triangle of lower wide upper point.For convenience of narration, three sides for forming above-mentioned triangle are distinguished The referred to as base affixed with hush panel inner wall or bottom wall, close on the interior bevel edge of setting or interior skew wall with pull rod, face away from pull rod The outer bevel edge or outer skew wall that nearly lower medial wall of the tube is set.Obviously, skew wall constitutes a cross section in pull rod outer wall and lower cylinder ring V-shaped chamber groove sharp under width is presented, which is also one of key structure of this patent.The elastic ring body, which is one, has bullet The entity of property, in practical applications, can be made of silica gel material.In order to ensure elastic packing effect, elastic ring body design Must be more slightly larger than physical location space, such elastic ring body is exactly to be extruded to be installed into lower tube inner chamber.The benefit so installed It is to ensure that elastic ring body and adjacent each component are all elastic expansion face contacts, considerably increases leakproofness.The upper cylinder groove and Lower cylinder groove is separately positioned in elastic ring body upper and lower ends face.Upper cylinder groove is in the cross section of fastening corresponding with upper cylinder ring under upper width The ring-type of sharp triangle, therefore two elastic arms split by upper cylinder groove will be formed on elastic ring body top, i.e., it is elastic with pull rod The interior upper elastic arm of fitting and the outside upper elastic arm being bonded with lower tube inner chamber wall.Similar, lower cylinder groove is buckled in corresponding with lower cylinder ring The cross section of conjunction is the ring-type of wide triangle under upper point, therefore two bullets split by lower cylinder groove will be formed in elastic ring body lower part Property arm, i.e., with lower elastic arm in pull rod elastic fit and the outer lower elastic arm being bonded with lower tube inner chamber wall.Therefore, elastic ring body Cross section substantially in the more thick and solid X-shaped in middle part.The purpose so set, as soon as the surface area of increase elastic ring body, Increase the contact area of elastic ring body and lower tube inner chamber wall, further improving prevents from leaking out, leak coal or leaking the effect of powder.Two It can play the role of to elastic ring body relative positioning.Most important effect is that, when pull rod moves axially, elastic ring body can lead to Cross interior upper elastic arm, the corresponding automatic elastic of interior lower elastic arm move to ensure the sealing reliability of elastic ring body and pull rod.In detail For thin, when pull rod moves down, air, coal dust in traditional cabin are most likely under pull rod drives the avris outside pull rod Leak out.But in this patent, because elastic ring body, which is extruding, is installed on lower tube inner chamber, when pull rod glides, interior upper bullet Property arm be the expansion elastic force of pull rod outer wall and interior skew wall to be weakened without from the chamber of falling v-shaped groove from slippage, more will not be because of two Person separates the gap to form air or coal dust leakage.At this time, interior lower elastic arm automatic under pull rod drive can be wriggled downwards, and interior Lower elastic arm can enter at the upper wide v-shaped chamber groove depth of lower point being made of skew wall in pull rod outer wall and lower cylinder ring and start to accumulate. With the downslide of pull rod, interior lower elastic arm can be squeezed in above-mentioned v-shaped chamber groove, while to v-shaped chamber groove two side, that is, pull rod Skew wall forms the extruding force of bigger in lateral wall and lower cylinder ring, and which enhances close between elastic ring body, pull rod and lower cylinder Feng Xing, has further prevented to leak out, has leaked coal or leakage powder problem.Likewise, when pull rod upward sliding, interior lower elastic arm and v-shaped Since the expansion elastic force of chamber groove can weaken but the gap for the coal that less leaks out, leaks as formation full of whole v-shaped chamber groove, and interior upper bullet Property arm can strengthen leakproofness between elastic ring body, pull rod and lower cylinder, guarantee will not leak out, leak coal or leakage powder.In conclusion this Patent design main points be can with sliding up and down for pull rod adjust automatically sealing emphasis, fundamentally prevented to leak out, Leak coal or leak the possibility of powder.In this patent, be also equipped with some springs in lower tube inner chamber, spring it is inner with outside elastic ring body Sidewall elastomer presses press-fit, and outer spring end and lower cylinder inner wall elasticity press press-fit, and elastic ring body inner wall is expressed to by above-mentioned spring On pull rod, the sealed connection performance of pull rod and elastic ring body further enhancing.

As an improvement, the rubber ring closed with the assembling of pull rod elastic seal cartridge is installed with sealing.

After the rubber ring coordinated with pull rod coaxial package is fixedly mounted in sealing, rubber ring inner ring can be with pull rod outer wall elasticity Sealing shroud assembling is closed, and so can not only be prevented inner air and coal dust from revealing, can also be stopped that exterior debris enters lower tube inner chamber, The reliability service of this patent is greatly ensured.

As a further improvement, hush panel edge is equipped with ring groove corresponding with lower cylinder plate, silicon is installed in ring groove Rubber ring.

The ring groove being coaxially disposed with pull rod is set in hush panel edge, falope ring can be installed in ring groove, so After being fastened by lower bolt, falope ring is just compressed in the convergence part of hush panel and lower cylinder plate, ensure that the sealing that both connect Property, helping to improve this patent prevents from leaking out, leak coal or leaking the ability of powder.

As a further improvement, two row cavity loops being coaxially disposed with elastic ring body, two row cavitys are equipped with elastic ring body Ring setting symmetrical above and below, upper elastic arm and the interior lower elastic arm arrangement respectively inwards in the middle part of elastic ring body lateral wall of two row cavity loops Set, and the aperture of cavity loop on the outside of the elastic ring body to inward side to becoming larger.

Cavity loop is provided in the toroidal cavity being coaxially disposed in elastic ring body with elastic ring body, circular in cross-section, circle Shape, which is set, can ensure stress evenly, be not easily broken after being squeezed.Cavity loop is set in elastic ring body, primarily to Increase elastic deformation and pliability, enhancing and the compactness and leakproofness of pull rod and lower cylinder inner wall when being squeezed, especially exist When pull rod slides up and down, more yielding interior upper elastic arm and interior lower elastic arm can be easier to be fitted tightly over one with pull rod Rise, ensure that both gluing, sealings, effectively prevent from leaking out and leak powder phenomenon.

In conclusion reasonable using the special coal dust leakproof assistant apparatus structure in power plant of this structure, sealing is tight, energy Enough adjust automatically connection sealings with the slip of pull rod, are not easy the coal that leaks out, leaks, installing and dismounting is simple, easy to maintenance, and has Help reduce cost.

Brief description of the drawings

The utility model is described in further detail with reference to attached drawing：

Fig. 1 is the structure diagram of the utility model；

Fig. 2 is the fit structure schematic diagram of the utility model and pull rod；

Fig. 3 is the structure diagram of upper sealing mechanism；

Fig. 4 is the structure diagram of pressing plate；

Fig. 5 is the structure diagram of lower sealing mechanism；

Half section structure diagram when Fig. 6 is elastic ring body nature；

Fig. 7 is the half section structure diagram that elastic ring body is squeezed and mounted in lower cylinder.

Embodiment

As shown in Figure 1, the special coal dust leakproof auxiliary device in the power plant is included installed in the upper close of 1 top of coal pulverizer cabin Sealing mechanism 2 and the lower sealing mechanism 3 installed in coal pulverizer cabin lower part, the upper sealing mechanism include being installed on cabin upwards Extended positioning tube 4, positioning tube and 5 coaxial package of pull rod being inserted into cabin are set, and positioning tube upper end passes through upper bullet Property detent mechanism 6 be connected with seal closure 7, upper seal closure includes the cover cylinder 8 that can be slided up and down suit with pull rod and coordinate, in cover cylinder Be arranged at intervals with groove 9, bracket groove 10, lower groove 11 on wall from the top down, upper groove, bracket groove, be installed with respectively in lower groove with outside pull rod Upper copper ring 12, middle copper ring 13, the lower copper ring 14 that wall sealing is slidably matched.The special coal dust leakproof auxiliary device in this power plant mainly wraps Six part-structures are included, i.e.,：Positioning tube, upper elastic locating mechanism, upper seal closure, upper copper ring, middle copper ring, lower copper ring.Wherein, position Cylinder is vertical to be fixed on above cabin, and positioning tube is cylindrical, coordinates with pull rod coaxial package.It is straight much larger than pull rod to position storehouse internal diameter Footpath, so setting can make pull rod keep the reliable free degree when radial direction Light deformation occurs, avoid with positioning tube etc. other The mechanical collision of component or friction, help to improve work smoothness and reliability.Meanwhile positioning tube is also other portions of this patent The installation carrier of part, support force is provided for miscellaneous part.Positioning tube also has an effect, exactly makes the connection of this patent and pull rod Away from the middle part of pull rod and close to tie rod end, radially rocked in can so being moved to avoid pull rod as far as possible, improve pull rod and exist in position The relative stability of position in cabin.Positioning tube upper end is provided with upper seal closure by upper elastic locating mechanism, upper seal closure with Pull rod outer wall elastic packing coordinates.

The main function of upper elastic locating mechanism is that upper seal closure can be positioned to positioning tube end and allowed upper close Sealing cover is moved with small radial displacement relative positioning cylinder, thus plays flexibly positioned effect.Flexibly positioned acting body It is exactly that in certain small radial direction vibrations, seal closure still keeps sealing pull rod with pull rod in guarantee now with pull rod with closing State, so ensures that and does not leak out, do not leak coal.In this patent, upper seal closure is cylindrical, assembles and closes with drag link sleeve.On Three annular grooves are sequentially arranged at intervals with seal closure inner wall from the top down, i.e.,：Upper groove, bracket groove and lower groove, upper groove, bracket groove and Correspondence is installed with copper ring, middle copper ring and lower copper ring respectively in lower groove.Block respectively the outside portion of upper copper ring, middle copper ring and lower copper ring In upper groove, bracket groove and lower groove, upper seal closure inner wall is all extended in the inside portion of upper copper ring, middle copper ring and lower copper ring, and Upper copper ring, the internal ring wall of middle copper ring and lower copper ring and the sealing of pull rod outer wall are slidably matched.In this patent, upper copper ring, middle copper ring Copper material is all used with lower copper ring, not only there is certain elasticity relative to other materials, ensure that sealing effect, and with excellent Good wearability, ensure that the reduction of job stability and cost.In this patent, copper ring, middle copper ring and lower copper are employed Ring three seals ring structure, greatly ensure that the sealing effect of seal closure and pull rod, fundamentally prevented to leak out, leak coal or The drawbacks of leaking powder.This patent is reasonable in design, it is necessary to during demolition and maintenance, only need to open elastic locating mechanism, you can will be upper Seal closure separates, and Awaiting Parts or integral replacing are all very convenient.

In this patent, the upper elastic locating mechanism includes the annular groove 15 for being arranged on cover cylinder lower part, and interval is inserted in annular groove Equipped with least three pressing plates 16, pressing plate outer end is fixed together by upper bolt 17 and the positioning plate 18 of positioning tube upper end.At this In upper elastic locating mechanism, pressing plate is the bridge of the upper seal closure of connection and positioning tube, the inner embedded upper seal closure lower part of pressing plate In annular groove, pressing plate outer end is fixed together by the way that upper bolt is corresponding with the positioning plate of positioning tube upper end.In this patent, pressing plate Quantity does not limit, but at least three, it can so play the role of the upper seal closure of uniform force application positioning.

In the present embodiment, the pressing plate includes the upper plate 19 coordinated with annular groove inserting, the lower plate 20 coordinated with positioning plate, The middle plate 21 for being fixed together upper plate and lower plate is further included, a housing is formed between upper plate, middle plate and positioning plate The cavity 22 of cylinder lower part.In this pressing plate, pressing plate is mainly made of three parts structure, i.e. upper plate, middle plate and lower plate.Wherein, on Plate and lower plate dislocation are arranged in parallel, both adjacent portions are fixed together by middle plate, and three cross section is substantially Z-shape.On Plate coordinates with annular groove inserting, and lower plate is fixedly mounted on positioning plate by upper bolt, therefore upper seal closure is fixed by pressing plate It has been pressed on positioning plate.For convenience of narration, base pressure plate will be known as by the upper seal closure part of press-fit with positioning plate below annular groove, Base pressure edges of boards portion is located in a cavity being made of upper plate, middle plate and positioning plate, and the cavity is bigger than base pressure plate, that is to say, that Base pressure plate can in stress transverse shifting, namely move radially in the cavity, so ensure that pull rod radial direction shake when Upper seal closure can also move and still can guarantee that the sealing reliability of pull rod and upper sealing mechanism.

In this patent, positioning plate top surface is equipped with top surface groove 23, is provided with top surface groove and cover cylinder bottom surface elastic packing The sealing ring 24 of cooperation.Top surface groove is set on positioning plate top surface, and sealing ring is set in top surface groove, can make positioning plate and Base pressure plate can still keep elastic packing to coordinate when pull rod radially shakes, and further ensure the sealing stability of this patent.

In the present embodiment, the lower sealing mechanism includes being installed on the lower cylinder that cabin lower part coordinates with pull rod coaxial package 01, lower cylinder upper port is installed with the upper cylinder plate 08 closed with drag link sleeve assembling, and lower cylinder lower end oral area is connected with outwardly extending lower cylinder Plate 02, is installed with hush panel 04 by lower bolt 03 on lower cylinder plate, the envelope closed with drag link sleeve assembling is equipped with the middle part of hush panel Mouth 05, lower cylinder is interior to be provided with the elastic ring body 07 for making lower cylinder coordinate with the crush seal of pull rod elasticity by interior detent mechanism 06.This The special coal dust leakproof auxiliary device in power plant mainly includes four part-structures, i.e.,：Lower cylinder, upper cylinder plate, lower cylinder plate, elastic ring body. Wherein, lower cylinder is the housing parts of lower sealing mechanism, and the installation carrier of miscellaneous part.Lower cylinder is circular tube shaped, same with pull rod Axle sleeve assembling is closed, and toroidal cavity is equipped between lower cylinder inner wall and pull rod outer wall.Lower cylinder upper end is connected with cylinder plate, upper cylinder plate middle part Equipped with the hole closed with drag link sleeve assembling, upper cylinder plate and pull rod are clearance fit, therefore pull rod can pass freely through cylinder plate.Lower cylinder Equipped with lower cylinder plate horizontal-extending laterally, lower cylinder plate bottom snap by there are hush panel, hush panel and corresponding lower cylinder in lower end Plate peripheral ring is equipped with some lower bolts, both pass through lower bolt fixed seal connection.Hush panel central part is equipped with suit pull rod Sealing, sealing diameter is much larger than pull rod outside diameter, in order to which pull rod is slightly radially swung.In this way, upper cylinder plate, lower cylinder, hush panel are just It has been surrounded by the inner cavity of lower cylinder.In this patent, an elastic ring body is provided with by interior detent mechanism in lower tube inner chamber, elasticity Inner wall of ring body is closed with the assembling of pull rod outer wall elastic seal cartridge, and elastic ring body outer wall coordinates with lower tube inner chamber wall elastic packing.Work as drawing When bar moves axially, elastic ring body can synchronously be followed by elastic deformation to realize, have slight radial direction to shake even if pull rod It can be absorbed by elastic ring body, therefore ensure that lower sealing mechanism neither leaks out nor leak coal or leakage powder.

In the present embodiment, the interior detent mechanism includes being installed in coordinating with pull rod gap package on cylinder plate inner wall Upper cylinder ring 09, upper cylinder ring cross section presents triangle sharp under width, is installed with hush panel inner wall and matches somebody with somebody with pull rod gap package The lower cylinder ring 010 closed, lower cylinder ring cross section are in the triangle of lower wide upper point, are respectively equipped with the elastic ring body upper and lower ends face With the upper cylinder groove 011 and lower cylinder groove 012 of upper cylinder ring and the lower clamped cooperation of cylinder ring, between elastic ring body lateral wall and lower cylinder inner wall If the spring 013 that capable person's elastic ring body inner wall is expressed on pull rod is evenly equipped with annular chamber.Elastic ring body top is equipped with and upper cylinder Corresponding two elastic arms in 09 two side of ring, i.e., in upper elastic arm 018 and outside upper elastic arm 019, interior upper elastic arm with pull rod Together, outside upper elastic arm fits together portion's elastic fit with lower tube inner chamber wall lower part；Elastic ring body lower part is equipped with and lower cylinder Corresponding two elastic arms in 010 two side of ring, i.e., in lower elastic arm 020 and outer lower elastic arm 021, interior lower elastic arm with pull rod Together, outer lower elastic arm fits together portion's elastic fit with lower tube inner chamber wall lower part.

Detent mechanism mainly includes five part-structures in this, i.e.,：Upper cylinder ring, upper cylinder groove, lower cylinder ring, lower cylinder groove and spring. Wherein, upper cylinder ring is installed on cylinder plate inner wall, in circular ring shape, is coordinated with pull rod gap package, width is presented in upper cylinder ring cross section Lower sharp triangle.For convenience of narration, three sides for forming above-mentioned triangle are referred to as the top affixed with upper cylinder plate inner wall Side or roof, close on the interior bevel edge of setting or interior skew wall with pull rod, and the outer bevel edge that lower medial wall of the tube is set is closed on away from pull rod Or outer skew wall.Obviously, should the groove of falling v-shaped as soon as skew wall constitutes the chamber of falling v-shaped groove wide under a upper point in pull rod outer wall and lower cylinder ring It is one of key structure of this patent.Lower cylinder ring is fixed on hush panel inner wall, and lower cylinder ring is also in circular ring shape, is covered with pull rod gap Assembling is closed, and lower cylinder ring cross section is in the triangle of lower wide upper point.For convenience of narration, three sides for forming above-mentioned triangle are distinguished The referred to as base affixed with hush panel inner wall or bottom wall, close on the interior bevel edge of setting or interior skew wall with pull rod, face away from pull rod The outer bevel edge or outer skew wall that nearly lower medial wall of the tube is set.Obviously, skew wall constitutes a cross section in pull rod outer wall and lower cylinder ring V-shaped chamber groove sharp under width is presented, which is also one of key structure of this patent.

The elastic ring body is a flexible entity, in practical applications, can be made of silica gel material.For Guarantee elastic packing effect, elastic ring body are designed to more slightly larger than physical location space, and such elastic ring body is exactly to be extruded It is installed into lower tube inner chamber.The benefit so installed is to ensure that elastic ring body and adjacent each component are all elastic expansions by crimping Touch, considerably increase leakproofness.The upper cylinder groove and lower cylinder groove are separately positioned in elastic ring body upper and lower ends face.Upper cylinder groove is in The cross section of fastening corresponding with upper cylinder ring is the ring-type of upper wide lower sharp triangle, therefore will be formed on elastic ring body top by upper cylinder Two elastic arms of groove segmentation, i.e., with going up elastic arm and the outside upper elasticity being bonded with lower tube inner chamber wall in pull rod elastic fit Arm.Similar, ring-type of the lower cylinder groove in the cross section of fastening corresponding with lower cylinder ring for wide triangle under upper point, therefore in elastic ring Two elastic arms split by lower cylinder groove will be formed at body lower part, i.e., with lower elastic arm in pull rod elastic fit and with lower tube inner chamber The outer lower elastic arm of wall fitting.Therefore, the cross section of elastic ring body is substantially in the more thick and solid X-shaped in middle part.The mesh so set , as soon as the surface area of increase elastic ring body, also increases the contact area of elastic ring body and lower tube inner chamber wall, is further lifted Prevent from leaking out, leak coal or leaking the effect of powder.Two can play the role of to elastic ring body relative positioning.Most important effect It is that, when pull rod moves axially, elastic ring body can be moved by the corresponding automatic elastic of interior upper elastic arm, interior lower elastic arm to protect Demonstrate,prove the sealing reliability of elastic ring body and pull rod.Specifically, when pull rod moves down, air, coal dust in traditional cabin It is most likely under pull rod drives to go out from side leakage outside pull rod.But in this patent, it is installed on because elastic ring body is extruding Lower tube inner chamber, so when pull rod glides, interior upper elastic arm be the expansion elastic force of pull rod outer wall and interior skew wall is weakened without The gap for forming air or coal dust leakage can will not be more separated because of both from the chamber of falling v-shaped groove from slippage.At this time, interior lower elasticity Arm automatic under pull rod drive can be wriggled downwards, and interior lower elastic arm can enter and is made of skew wall in pull rod outer wall and lower cylinder ring At the lower upper wide v-shaped chamber groove depth of point and start to accumulate.With the downslide of pull rod, interior lower elastic arm can be squeezed in above-mentioned v-shaped chamber groove It is interior, while the extruding force of bigger is formed to skew wall in v-shaped chamber groove two side, that is, pull rod lateral wall and lower cylinder ring, thus The leakproofness between elastic ring body, pull rod and lower cylinder is enhanced, further prevented to leak out, leaked coal or leakage powder problem.Likewise, When pull rod upward sliding, since the expansion elastic force of interior lower elastic arm and v-shaped chamber groove can weaken but be full of whole v-shaped chamber groove less As for the gap for forming the coal that leaks out, leaks, and interior upper elastic arm can strengthen the leakproofness between elastic ring body, pull rod and lower cylinder, protect Card will not leak out, leak coal or leakage powder.In conclusion i.e. be can be with sliding up and down for pull rod and automatic for this patent designing points Adjustment sealing emphasis, has fundamentally prevented to leak out, leak coal or leak the possibility of powder.In this patent, also pacify in lower tube inner chamber Equipped with some springs, spring is inner to press press-fit, outer spring end and the elasticity pressing of lower cylinder inner wall with elastic ring body lateral wall elasticity Coordinate, elastic ring body inner wall is expressed on pull rod by above-mentioned spring, further enhancing the sealed connection of pull rod and elastic ring body Performance.

In this patent, the rubber ring 014 closed with the assembling of pull rod elastic seal cartridge is installed with sealing.It is solid in sealing After Dingan County fills the rubber ring coordinated with pull rod coaxial package, rubber ring inner ring can be assembled with pull rod outer wall elastic seal cartridge and closed, so It can not only prevent inner air and coal dust from revealing, can also stop that exterior debris enters lower tube inner chamber, greatly ensure this patent Reliability service.

In the present embodiment, hush panel edge is equipped with ring groove 015 corresponding with lower cylinder plate, and silicon is provided with ring groove Rubber ring 016.The ring groove being coaxially disposed with pull rod is set in hush panel edge, falope ring can be installed in ring groove, so After being fastened by lower bolt, falope ring is just compressed in the convergence part of hush panel and lower cylinder plate, ensure that the sealing that both connect Property, helping to improve this patent prevents from leaking out, leak coal or leaking the ability of powder.

As an improvement, two row cavity loops 017 being coaxially disposed with elastic ring body are equipped with elastic ring body, on two row cavity loops Under be symmetrical arranged, upper elastic arm and interior lower elastic arm arrangement are set two row cavity loops respectively inwards in the middle part of the elastic ring body lateral wall Put, and the aperture of cavity loop on the outside of the elastic ring body to inward side to becoming larger.Cavity loop be provided in elastic ring body with The toroidal cavity that elastic ring body is coaxially disposed, circular in cross-section, circle, which is set, can ensure stress evenly, after being squeezed not It is easily rupturable.Cavity loop is set in elastic ring body, primarily to increase elastic deformation and pliability when being squeezed, enhancing With the compactness and leakproofness of pull rod and lower cylinder inner wall, especially when pull rod slides up and down, more yielding interior upper elastic arm Together with interior lower elastic arm can be easier to fit closely with pull rod, both gluing, sealings are ensure that, effective anti-leak-stopping Wind and leakage powder phenomenon.

In this patent, for the innovation structure for this patent of giving prominence to the key points, easy to describe and understand, eliminate in the accompanying drawings Cabin internal structure and pull rod are located at the structure at cabin and pull rod both ends, and said structure is nor the innovative point institute of this patent Said structure belongs to known technology, not described in detail herein.

Claims (6)

1. a kind of special coal dust leakproof auxiliary device in power plant, including installed in coal pulverizer cabin（1）The upper sealing mechanism on top （2）With installed in coal pulverizer cabin（1）The lower sealing mechanism of lower part（3）, it is characterized in that：The lower sealing mechanism（3）Including peace Mounted in cabin（1）Lower part and pull rod（5）The lower cylinder that coaxial package coordinates（01）, lower cylinder（01）Upper port is installed with and pull rod（5） It is set with the upper cylinder plate coordinated（08）, lower cylinder（01）Lower end oral area is connected with outwardly extending lower cylinder plate（02）, lower cylinder plate（02）On Pass through lower bolt（03）It is installed with hush panel（04）, hush panel（04）Middle part is equipped with and pull rod（5）It is set with the sealing coordinated （05）, lower cylinder（01）It is interior to pass through interior detent mechanism（06）Being provided with makes lower cylinder（01）With pull rod（5）What elastic crush seal coordinated Elastic ring body（07）.

2. the special coal dust leakproof auxiliary device in power plant as claimed in claim 1, it is characterized in that：The interior detent mechanism（06） Including being installed in upper cylinder plate（08）On inner wall and pull rod（5）The upper cylinder ring that gap package coordinates（09）, upper cylinder ring（09）It is transversal Present triangle sharp under width, hush panel in face（04）It is installed with inner wall and pull rod（5）The lower cylinder ring that gap package coordinates （010）, lower cylinder ring（010）Cross section is in the triangle of lower wide upper point, the elastic ring body（07）Set respectively in upper and lower ends face Have and upper cylinder ring（09）With lower cylinder ring（010）The upper cylinder groove of clamped cooperation（011）With lower cylinder groove（012）, elastic ring body（07）Outside Side wall and lower cylinder (01) in annular chamber between inner wall if be evenly equipped with capable person's elastic ring body（07）Inner wall is expressed to pull rod（5）On Spring（013）.

3. the special coal dust leakproof auxiliary device in power plant as claimed in claim 2, it is characterized in that：Elastic ring body top be equipped with Upper cylinder ring（09）Corresponding two elastic arms in two side, i.e., interior upper elastic arm（018）With outside upper elastic arm（019）, interior upper elasticity Together with the elastic fit of pull rod top, outside upper elastic arm fits together arm with lower tube inner chamber wall lower part；Elastic ring body lower part Equipped with lower cylinder ring（010）Corresponding two elastic arms in two side, i.e., interior lower elastic arm（020）With outer lower elastic arm（021）, it is interior Lower elastic arm fits together with pull rod lower elastic, and outer lower elastic arm fits together with lower tube inner chamber wall lower part.

4. the special coal dust leakproof auxiliary device in power plant as claimed in claim 3, it is characterized in that：Sealing（05）Interior fixed installation Have and pull rod（5）The rubber ring that elastic seal cartridge assembling is closed（014）.

5. the special coal dust leakproof auxiliary device in power plant as claimed in claim 4, it is characterized in that：Hush panel（04）Edge ring is set Have and lower cylinder plate（02）Corresponding ring groove（015）, ring groove（015）Falope ring is inside installed（016）.

6. the special coal dust leakproof auxiliary device in power plant as claimed in claim 5, it is characterized in that：It is equipped with and bullet in elastic ring body The two row cavity loops that property ring body is coaxially disposed（017）, two row cavity loops（017）Setting symmetrical above and below, two row cavity loops（017）From Upper elastic arm and interior lower elastic arm spread configuration, and cavity loop respectively inwards in the middle part of elastic ring body lateral wall（017）Aperture from To inward side to becoming larger on the outside of elastic ring body.