A kind of rotary type circle pair of pages maintenance door
Technical field
The present invention relates to a kind of sack cleaner apparatus for examination and repair, particularly relate to bag type dust remover roof maintenance door.
Background technology
Along with the development of industrial age, sack cleaner has become as equipment necessary to many plant produced. Sack cleaner top generally all can arrange maintenance door, in order to implements maintenance. Sack cleaner top access door includes the access hole being arranged on sack cleaner air-purifying chamber top and is arranged on the cover plate above access hole, the top access door of current a lot of sack cleaner producer is bolt, nut adds covering plate structure, utilize spanner the nut screwing clamping of cover plate, and then cover plate is pushed down maintenance door, it is prevented that maintenance valve blow-by. Dust remover roof maintenance door is more, and especially the large-scale dust remover roof maintenance door of dozens of room reaches more than hundreds of, and the maintenance door cover plate weight that next has is up to dozens or even hundreds of jin, it is extremely difficult to stir. Therefore the problem solving cover plate unlatching difficulty can bring many facilities to the regular maintenance of sack cleaner.
When sack cleaner work, dusty gas, under the effect of negative-pressure air-flow, enters dust removing body from the entrance of separator, and by sock filtration effect, dust is separated from air-flow, and the clean gas being cleaned is discharged from the internal air-purifying chamber that enters of filter bag. Being negative pressure inside air-purifying chamber when sack cleaner work briefly, the existence of negative pressure easily causes air-purifying chamber extraneous gas and scurries in air-purifying chamber from access hole, affects the work efficiency of cleaner unit. How to overcome the counter productive that air-purifying chamber negative pressure is brought, be also one of the technical problem to be solved in the present invention.
Domestic patent database discloses the patented technology of some dust remover roofs maintenance door:
Such as: [patent No.] CN200920114489.X, the top access door of [title] a kind of cleaner unit, [day for announcing] 2009.11.11, disclose the top access door of a kind of cleaner unit, including doorframe, sealing strip, door closure, the outside of described doorframe is provided with angle steel, and described sealing strip embeds in angle steel.Described door closure be formed around pressing plate, door closure is additionally provided with hatch door and some lifting eye seats, described lifting eye seat is provided with hanger. This utility model good seal performance, long service life.
The technical scheme that this utility model discloses is the technical scheme of comparatively typical " preventing extraneous gas from scurrying into air-purifying chamber ", and Main is to fill the gap between cover plate and access hole with sealing strip, it is prevented that gas enters. But, cover plate is opened the problem of difficulty and is not solved, especially for the cover plate of weight up to dozens or even hundreds of jin, still has a strong impact on the service work of staff.
Such as: [application number] CN201310623942.0, [title] a kind of sack cleaner maintenance door and opening device, [publication date] 2014-02-26, disclose a kind of sack cleaner maintenance door and opening device, containing maintenance door, maintenance door right-hand member is fixed on the housing of dust remover roof by the briquetting bolt presses on briquetting and briquetting, the upper right end face of described maintenance door is provided with a draw ring, containing left support bar, right support bar, upper connecting rod and lower link, the structure of described left support bar is as follows: possibly together with door pull bar, bottle gouard moved by hands, support bar and a bracer, described door pull bar lower end is by fixing plate and is bolted on the housing of dust remover roof, described door pull bar upper end is provided with fixing hole, described bottle gouard moved by hands is respectively arranged at two ends with fixing chain and manual-chain, described fixing chain end is arranged on the upper end of a pull bar by fixing hole, described manual-chain end is arranged on the upper right end face of maintenance door by door draw ring, described support bar one end is arranged on maintenance door upper surface by hinge, described hinge is positioned on the left of a draw ring, described support bar other end end is provided with draw-in groove, described bracer is arranged on the housing between a pull bar and door hinge seat.
This invention make use of the mechanism of similar lever for opening the cover plate of heaviness, makes the unlatching of maintenance door become easy. But this maintenance door and opening device structure relative complex, particularly when dust remover roof is provided with multiple maintenance door time, it is necessary to accordingly arrange overlap leverage more, from manufacturing cost and easy and simple to handle angularly, the program reality is weak.
Such as: [patent No.] CN201120565155.1, [title] top access door lid hold down gag, [day for announcing] 2012.09.12, disclose a kind of top access door lid hold down gag, it includes the maintenance door and the door closure that are arranged on box top, is sleeved on the briquetting being provided with screw on bolt and nut and gripper shoe, on the box top outside the doorframe on described maintenance door correspondence both sides, being respectively welded a channel-shaped base plate, the middle part of channel-shaped base plate transverse horizontal part offers U-shaped otch. Channel-shaped base plate is welded on the box top outside the doorframe on maintenance door correspondence both sides as fixing point, the U-shaped otch of its transverse horizontal part middle part is as the activity point of penetration of bolt, bolt only need to be cut from the U-shaped incision of channel-shaped base plate, briquetting and door closure can be fastened on bolt by nut, greatly facilitate the installation to securing member, dismounting. Both securing member in the future had been made to get rusty bonding, it is also possible to be therefrom moved out easily with maintenance tool, by also repeatable utilization after eliminating rust, reduction maintenance cost. This utility model, the problem solving the installation of securing member, dismounting, but for how to overcome counter productive that air-purifying chamber negative pressure brings and solve cover plate and open the problem of difficulty and will be obviously not present technical contribution.
In sum, the technology flaw of sack cleaner top access door is mainly reflected in cover plate unlatching difficulty, sealing differs from two aspects.In air-purifying chamber, negative pressure is the necessary condition of sack cleaner work, but can cause " extraneous gas is scurried in air-purifying chamber ". Sealing joint strip may be used for filling the space between cover plate and maintenance door, it is ensured that air-tightness, however it is necessary that abundant extruding. Heavy cover plate can crush seal adhesive tape well, but be difficult to open. How solving above-mentioned contradiction dexterously, the negative effect that can eliminate negative pressure in air-purifying chamber ensures air-tightness, under the premise not changing cover plate weight, can open cover plate easily again, be the research direction of the present invention.
Summary of the invention
Present invention aim to address the problem that existing bag type dust remover roof maintenance door sealing is poor, cover plate unlatching is difficult, it is provided that one can utilize negative pressure in air-purifying chamber to improve bubble-tight rotary type circle pair of pages maintenance door.
The rotary type circle pair of pages maintenance door of the present invention, including the access hole being arranged on sack cleaner air-purifying chamber top and the cover plate being arranged on above access hole and matching. Described cover plate is divided into symmetrical two pieces of sub-cover plates of semicircle, and two pieces of sub-cover plates are all movably mounted on same rotation axle, it is possible to turns clockwise in horizontal plane respectively around rotating axle or rotates counterclockwise. The limit that two pieces of sub-cover plates are adjacent is provided with side seals adhesive tape; Being provided with arc guide barrel with corresponding region, access hole edge bottom sub-cover plate, guide groove is divided into upper and lower two-layer, and upper strata is installed with the spring for extruding ball, and lower floor, equipped with the diameter ball consistent with channel widths, is provided with the support plate of activity between ball and spring. Cover plate upper rail periphery arc area is provided with one layer of sealing joint strip, the balance height when height of sealing joint strip is pressed on spring higher than cover plate total weight. Described guide groove slightly extends internally at opening part, is stuck in guide groove by ball. Being additionally provided with the sleeve for stoping cover plate to cave in and bayonet lock on cover plate, it is one-body molded that described sleeve is arranged on cover plate outer edge and cover plate, and bayonet lock be flat and consistent with cover plate radian, and bayonet lock passes sleeve and gone here and there actively together by two pieces of sub-cover plates.
It should be noted that the sub-cover plate of the present invention is for semicircle, semicircular structure can make spring be evenly distributed in arc guide barrel, and each position stress of circular cover is more uniformly distributed compared with square cover plate, is conducive to cover plate integral level down or up.
The operation principle of rotary type circle pair of pages maintenance door is such that when air-purifying chamber is idle time, air-purifying chamber air pressure inside P1 and external pressure P2 is equal, now cover plate is in balance height (D), rolling action due to ball, staff can open maintenance door by ease rotation cover plate, and air-purifying chamber is overhauled. Owing to air-purifying chamber is negative pressure work, when air-purifying chamber runs, air pressure inside P1 is less than external pressure P0, therefore cover plate is subject to atmospheric pressure F(F=(P0-P1) * S, wherein S is cover plate area), cover plate necessarily moves downward and contacts with sealing joint strip, being finally reached new balance, cover plate drops to highly more low, and air-tightness is more good.
Described balance height (D) is determined such that the height setting spring naturalness is G as the weight of H, cover plate and ball, and the coefficient of elasticity of spring is K, above-mentioned parameter it suffices that: D=H-(G/K).
Described cover plate is arranged over handle, facilitates staff's Level Promoting cover plate.
The vertical section of described sealing joint strip is Y-shaped, and Y-shape configuration increases the contact area of cover plate and adhesive tape. Time cover plate touches sealing joint strip, being blocked by access hole completely, the height that cover plate drops to is more low, and the contact area of adhesive tape is more big.
Balance height 1-3cm when the height of described sealing joint strip is pressed on spring lower than cover plate total weight, it is prevented that in cover plate rotation process due to slight vertical tremor extrusion damage sealing joint strip.
Described cover plate it is provided through cover plate and prevents the pilot pin of cover plate horizontal movement, so arranging and prevent air-purifying chamber work process cover plate horizontal movement impact maintenance door sealing. Pilot pin can make two pieces of sub-cover plates be leaning closely against together simultaneously, coordinates the side seals adhesive tape being arranged on sub-cover plate junction, can effectively strengthen air-tightness.
Described ball is hollow rigid spheroid, it is possible to saves and makes consumptive material, alleviates cover plate burden simultaneously.
The rotary type circle pair of pages maintenance door of the present invention solves the shortcoming and defect of prior art, compared with prior art has following progress:
1, adopting the mode rotating unlatching, time sack cleaner is idle, air-purifying chamber inner and outer air pressure is equal, and cover plate is in balance height (D), and cover plate does not contact with sealing joint strip, and due to the rolling action of ball, cover plate can be rotated away from access hole easily. So, eliminate the trouble unscrewing screw on the one hand, also solve cover plate on the other hand and stir the problem of difficulty, be finally reached minimizing maintenance workload, reduce the purpose of maintenance difficulty.
2, the negative effect of negative pressure in air-purifying chamber is converted into good effect, air-purifying chamber inner and outer air pressure difference is more greatly different, and extraneous gas is more big to the pressure of cover plate, and cover plate is more good to the squeezing effect of sealing joint strip, therefore extraneous gas is difficult to scurry in air-purifying chamber, it is ensured that the air-tightness of air-purifying chamber.
3, sealing joint strip is Y-shaped, time cover plate touches sealing joint strip, is blocked by access hole completely, and the height that cover plate drops to is more low, and adhesive tape is more big with the contact area of air-purifying chamber.
4, sub-cover plate is semicircle, and each position stress of cover plate is more uniformly distributed, and is conducive to cover plate integral level down or up.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation of rotary type circle pair of pages of the present invention maintenance door.
Fig. 2 is the top view of rotary type circle pair of pages of the present invention maintenance door.
Fig. 3 is guide groove tangent plane structural representation.
In figure, 1 air-purifying chamber; 2 cover plates; 3 access holes; 4 handles; 5 balls; 6 springs; 7 guide grooves; 8 sealing joint strips; 9 pilot pins; 10 support plates; 11 rotate axle; 12 side seals adhesive tape; Bayonet lock 13; 14 sleeves.
Detailed description of the invention
Referring to 13, including the access hole 3 being arranged on sack cleaner air-purifying chamber 1 top and the cover plate 2 being arranged on above access hole and matching, described cover plate is divided into symmetrical two pieces of sub-cover plates of semicircle, two pieces of sub-cover plates are all movably mounted on same rotation axle 11, it is possible to turn clockwise in horizontal plane respectively around rotating axle or rotate counterclockwise; The limit that two pieces of sub-cover plates are adjacent is provided with side seals adhesive tape 12; It is being provided with arc guide barrel 7 with corresponding region, access hole 3 edge bottom sub-cover plate, guide groove is divided into upper and lower two-layer, upper strata is installed with the spring 6 for extruding ball, and lower floor, equipped with the diameter ball 5 consistent with channel widths, is provided with the support plate 10 of activity between ball and spring; Cover plate upper rail periphery arc area is provided with one layer of sealing joint strip 8, the balance height when height of sealing joint strip is pressed on spring higher than cover plate 2 total weight; Described guide groove slightly extends internally at opening part, is stuck in guide groove by ball. Being additionally provided with the sleeve 14 for stoping cover plate to cave in and bayonet lock 13 on cover plate, it is one-body molded that described sleeve is arranged on cover plate outer edge and cover plate, and bayonet lock be flat and consistent with cover plate radian, and bayonet lock passes sleeve and gone here and there actively together by two pieces of sub-cover plates.
Described cover plate 2 is arranged over handle 4. The vertical section of described sealing joint strip 8 is Y-shaped, time cover plate 2 touches sealing joint strip 8, is blocked by access hole 3 completely. Balance height 1-3cm when the height of described sealing joint strip is pressed on spring lower than cover plate 2 total weight. Described cover plate 2 is provided through cover plate and prevents the pilot pin 9 of cover plate horizontal movement. Described ball is hollow rigid spheroid.
Time sack cleaner to be overhauled or to safeguard by staff, close the run switch of air-purifying chamber 1, treat time air-purifying chamber 1 inner and outer air pressure is equal, pilot pin 9 is taken down, hold handle 4, two pieces of sub-cover plates of rotating plate 2, due to the rolling action of ball 5, cover plate can be rotated away from access hole 3 easily. After access hole 3 fully opens, staff just can enter in air-purifying chamber 1 and carry out inspection operation. Overhaul complete, hold handle 4, two pieces of sub-cover plates of rotating plate 2 in opposite direction, until cover plate 2 returns to origin-location, pilot pin 9 is put back to hole, the location place of cover plate again, pilot pin can make two pieces of sub-cover plates be leaning closely against cooperation together and be arranged on the side seals adhesive tape of sub-cover plate junction, it is ensured that the air-tightness in cleaner unit work process, thereby completes all operations.