The application is to be September 1, application number in 2000 the dividing an application for the application for a patent for invention of " filter bag that dust catcher is used " that be 00802228.3 denomination of invention the applying date.
Description of drawings
Further specify the present invention by accompanying drawing below, various embodiments shown in the accompanying drawing, in the accompanying drawing:
Fig. 1 is the perspective view by dust catcher filter bag of the present invention, wherein, relates to first kind of form of implementation that locking folding lid is supported by the spring of buckling (Knackfeder);
Fig. 2 is the profile along Fig. 1 center line II-II, and it comprises a locking folding lid in the closed position;
Fig. 3 is and Fig. 2 corresponding view, but relates to the middle enable possition that the locking folding covers;
Fig. 4 is another and Fig. 2 corresponding view, wherein is in the enable possition after the revolution of locking folding lid;
Fig. 5 is the partial top view of filter bag through hole area;
Fig. 6 is for pressing the amplification view of Fig. 5 center line VI-VI;
Fig. 7 is for covering the closing spring characteristic line of the spring of buckling that loads to the locking folding by first kind of form of implementation of Fig. 1 to 6;
Fig. 8 is and the corresponding local figure of Fig. 5, but relates to second kind of form of implementation that locking folding lid is designed to elastomer member;
Fig. 9 is for pressing the profile of Fig. 8 center line IX-IX, the closed position of its expression locking folding lid;
Figure 10 is and the corresponding profile of Fig. 9, but expression is by the enable possition of the locking folding lid of second kind of embodiment;
Figure 11 is the structural representation of the locking folding lid that is used to handle a filter bag by the control piece that is located at dust catcher there, and wherein locking folding lid is in the position of not handled;
Figure 12 is the partial top view of Figure 11;
Figure 13 is the partial view of Figure 11, relates to the enable possition of locking folding lid;
Figure 14 is and the corresponding diagrammatic depiction of Figure 11, but relates to another kind of form of implementation;
Figure 15 is the partial top view of Figure 14; And
Figure 16 is the partial view of Figure 14, but locking folding lid is opened.
The specific embodiment
The filter bag 1 of the dust catcher that is used for not representing at first is described referring to Fig. 1, and it comprises the dust bag 3 that a fixed head 2 is connected with fixed head 2 with, for example bonds.
In fixed head 2, be provided with a cross section and be used for making the through hole 4 of dust bag 3 at dust catcher work control of dust for circular.Upside, that is the axial sealer 5 that for example centers on through hole 4 with fixed head 2 bondings one is being set on the surface of dust bag 3.
Through hole 4 can be closed by means of a gate part 6, and in illustrated embodiment, this gate part is designed to the locking folding and covers 7.But also can imagine the form of gate part 6 for guiding valve or revolving valve.
Locking folding covers 7 and is arranged in fixed head 2 inboards, makes it from the following frontier district that closely abuts in through hole 4 annulars.Press the design of first kind of embodiment among Fig. 1 to 6, specifically be chosen as fixed head 2 is formed with hardboard/overlapped layers 8 to 10 made of paper by three, wherein there is through hole 4 in the superiors 8.9 open and cut out locking folding and cover 7 from the intermediate layer, and its diameter is chosen as and is slightly larger than through-hole diameter, and locking is rolled over and covered 7 hinge area 11 and be made of the wedge shape compacting of this layer material.
Downside at orlop 10 dust bag 3 of fixing, for example bond, orlop 10 have a hole 12 with the through hole 4 coaxial orientations of ground floor 8, and its diameter equals the diameter of locking folding lid at least.
For being covered 7, the locking folding is pressed on sealing station, establish a spring that it is loaded towards the closed position at its downside, this spring is designed to one in illustrated embodiment spherical arched band spring 13 in cross section, wherein, this arched direction that is is covered 7 directions of leaving from locking folding down.
This design based on band spring 13 has constituted the spring 14 of buckling, and here cuts out with the sheet metal or the sheet metal of spring 13 by moulding (projection).
The spring 14 of buckling is contained in locking folding and cover 7 downside, and rolls at locking and to cover 7 hinge areas, 11 beyonds and be bound between intermediate layer 9 and the lower floor 10.This spring of buckling has a length of freely stretching out, and this length extends to the locking folding at least and covers 7 center.
The buckle this structural design of spring 14 of employing makes the spring of buckling that a kind of favourable spring characteristic curve be arranged.In the curve map of Fig. 7, represented spring characteristic curve for example.As can be seen from the figure, bending force N is from the position of zero degree, that is stretches at first acutely rising of position (cover 7 at this position locking folding and be maintained at closing position) from shown in Figure 2, for example reaches 3 newton.Depend on the size of the spring 14 of buckling, its E modulus (elastic modelling quantity) and the mode of moulding, the spring 14 of buckling almost is suddenly to bend in the process of bending, and bending force N significantly descends afterwards.Therefore when being about 7 to 12 °, angle of bend W reaches maximum deflection power N
MaxBy curve map as can be seen, represent simultaneously locking folding cover 7 to the bending force N that returns closing force decline continuously at first in further BENDING PROCESS, until reaching minimum of a value N
Min, it reaches when about 45 to 50 ° angle of bend in illustrated embodiment.This minimum bend power N for example equals 0.5 to 0.8 newton.
By this minimum of a value N
MinAfter, bending force N slightly rises once more in the further BENDING PROCESS of spring 14 of buckling, and this rising is for example until reach bending force N when angle of bend W is about 90 °
EndBe about 1.5 to 1.8 newton.
So the advantage of the spring of buckling of moulding is, and is very little in angle, just realized reducing bending force N during preferably less than 10 °.Thus at sealing station, that is when closing position, cover the high active force that provides desired on 7 at the locking folding.Owing to descending, so for the further bending very little opening force of 14 needs of spring of buckling by bending force N behind the maximum point Nmax.The buckle this spring performance of spring 14 of utilization is covered 7 health and the work that are designed to a kind of combination of cover of locking folding.This combination requires be equipped with high sealing force by closed position shown in Figure 2.In contrast be cover 7 in order to open locking folding, that is, but should reduce to time closing force in order to make it to be turned to the enable possition.
Locking folding covers 7 upset realizes that from the power of external action on it this power is represented with arrow P in the drawings by one.This power P can realize by the appropriate device in dust catcher.Like this, locking folding cover 7 can with controls, for example power governor mechanical connection of dust catcher.The manipulation of locking folding lid can be carried out by means of the servicing unit of electromechanics or pneumatic actuation.Can utilize the power source that exists in dust catcher to handle locking folding lid in addition, such power source for example has electromagnetic force, rotation, heat, kinoplaszm amount or pressure potential.
In addition also can only control the locking folding with regard to the pressure-loaded of the suction airstream of existence and cover 7 by itself.
Expression locking folding covers 7 closing position among Fig. 2, as close existing situation of stopping time at dust catcher.The spring 14 high reset forces of buckling cover 7 with the locking folding and are squeezed on the sealed seat surface, thereby capture the particulate that is collected in the dust bag 3 reliably.Here, locking folding cover 7 and has constituted one and cover the assembly of forming by hygiene cover and work.Therefore particulate is for example overflowed from filter bag 1 by vibration in the time of neither can be in filter bag 1 is packed dust catcher into, also can be when changing filter bag 1 for example since on full dust bag 3 pressurization particulate is extruded.
Covering 7 high pressure that form previously at the locking folding when connecting dust catcher impels it to overcome turning round to returning closing force of the spring 14 of buckling.When angle of bend reached 5 to 10 °, the spring 14 of buckling was in the almost bending suddenly of its buckled zone 15, and in this case, at the place, place of this buckled zone 15, band spring 13 forms linearity basically and extends in cross section.
Locking folding cover 7 open in, described high pressure can descend, but based on the spring performance of the spring 14 of buckling, this pressure still is enough to cover 7 and further deflect into enable possition shown in Figure 4 rolling over.
Disappear when closing down dust catcher and thing followed pressure, the spring 14 of buckling makes the locking folding cover the closing position that covering through hole 4 shown in Figure 2 is got back in 7 automatic again deflections at given to returning under the shutting.
Fig. 8 to Figure 10 illustrates and constitutes combined sanitary and another kind of alternative design of working and covering.The spring 14 of here buckling also is simultaneously that the locking folding covers 7, and for this reason, the locking folding covers 7 and is designed to spherical crooked elastomer member in cross section.
Elastomer locking folding cover locking folding among 7 embodiment that illustrated with the front cover 7 similar, it from the centre, here elastomeric layer open and cut off, and a shelly shape is arranged, it is downwards towards the interior curve of dust bag.
This elastomer locking folding covers 7 to have and above-mentioned band spring 13 similar spring performances, so in smaller angle district, have big to returning closing force near closing position, almost descend suddenly to returning closing force when crossing maximum, incident in this case is bending in buckled zone 15 scopes.
Form barometric gradient (pressure reduction) when the air exhauster of dust catcher is connected, it causes elastomer locking folding to cover 7 curving inwardly.Adopt this outstanding shape that is similar to shell of locking folding lid, produce " effect that the clip that sputters is such " of expectation from some barometric gradients.When cover at locking folding when reaching an enough big power on 7, when for example causing this enough big power by the pulse of suction airstream, locking is rolled over and is covered 7 and turn down, and air drag reduces after this.After air exhauster was closed down, the locking folding covered 7 and goes back to original position automatically again.
Figure 11 to 16 has represented two kinds of different designs, is used for handling automatically the filter bag lid, and the locking folding of preferably handling by embodiment noted earlier covers 7.
Utilization in dust catcher, exist for example at air blast 16 pressure potential on the pressure side, by means of a ripple box 17 and a piston 18, this pressure potential is converted into thrust or moment of torsion.
Converting to by Figure 11 to 13 under the situation of thrust, on piston 18, be provided with a push rod 19 that constitutes control piece 25, covering 7 extension plane earths perpendicular to the locking folding near the gyroaxis that it preferably constitutes from the top and act on locking and roll over and cover on 7 hinge area 11 in.The size of operational pressure potential and the size of piston area and handle required stroke and determine by such requirement, promptly, being applied to the power that locking folding covers on 7 by push rod 19 should be enough big, so that the locking folding is covered 7 to be opened, in this case further preferably, locking folding cover 7 unlatching and is supported by the spring performance covered by the folding of the locking among the top embodiment that has illustrated or the spring performance of a spring of attaching troops to a unit.
At the dust catcher duration of work, the locking folding covers 7 by holding unlatching from obtainable the trying hard to keep of pressure potential that forms simultaneously, so air-flow does not suffer the pressure loss (referring to Figure 13).Be used to open required power here and work to overcome locking folding and cover 7 elastic forces, this elastic force produces enough sealing effectiveness after dust catcher is closed down back that is pressure potential disappearance.
The structure here should be chosen as shown in figure 12, ripple box 17 is positioned to respect to being connected on suction on the fixed head 2 takes over 20 side direction and stagger, and take over 20 inside by the suction of packing into of the transverse link 21 of a rigidity with the push rod 19 of ripple box 17 mating reactions.Through part in 20 zones are taken in suction is sealed shut.
Figure 14 to 16 has represented another kind of alternative plan, and wherein pressure potential converts moment of torsion to.Here the piston 18 of ripple box 17 makes push rod 22 motion with fixed head 2 parallel orientations, the free end of push rod hinged one can be around the opening tool 24 of a control piece 25 of rotating shaft 23 rotating formations.All-or-nothing piece 24 extends above the locking folding covers 7 back to that side of push rod 22 abreast at gyroaxis 23.
When dust catcher is connected, push rod 22 move horizontally the rotation that converts all-or-nothing piece 24 to, this all-or-nothing piece 24 is pressed in the locking folding with its free end and cover on 7 and make it to overcome it and move to the enable possition to time closing force.
This pneumatic loading of gate part 6 also can be applied in the guiding valve, and the pressure potential of Cun Zaiing converts thrust to by means of piston and ripple box in this case.Opening movement also is to carry out under the situation that overcomes side valve type gate part spring force, and this spring force makes gate part automatically move on to closing position again in the dust catcher pass stopping time.
All disclosed features are main contents of the present invention.In the disclosed content of the application, also introduced subordinate/the whole disclosed contents of appended priority text (at the copy of first to file), for this purpose, in the application's claim, also absorbed the feature of these data.