CN105736874A - Compensation type air pipe leakage prevention structure of ventilation and air conditioning system and air pipe section machining method - Google Patents

Abstract

The invention discloses a compensation type air pipe leakage prevention structure of a ventilation and air conditioning system. The compensation type air pipe leakage prevention structure comprises a compensation type sealing structure, wherein the compensation type sealing structure comprises a compensation type sealing strip; the compensation type sealing strip is located between two flange edges of an air pipe flange; the two flange edges are fixed through a clamping structure or a connection bolt; the compensation type sealing strip is an opening type sealing strip or a closed type sealing strip; the opening type sealing strip is an omega-shaped sealing strip; and the closed type sealing strip is an O-shaped sealing strip. The compensation type air pipe leakage prevention structure is simple in form, reasonable in design, convenient to mount and good in use effect, and can be used for reducing an air leakage mount of an air pipe of the ventilation and air conditioning system effectively. Meanwhile, the invention discloses an air pipe section machining method. The air pipe section machining method comprises the following steps: step 1, cutting a metal sheet; step 2, carrying out seam machining; step 3, machining the flange edges; step 4, bending a plate of a pipe section body; and step 5, sewing a seam and compacting. The machining method has the advantages of simple steps, convenience for manufacturing and good use effect and can be used for conveniently and rapidly finishing a air pipe section machining process.

Description

Ventilation and air conditioning system offset-type airduct Anti-air-leakage structure and airduct tube coupling processing method

Technical field

The invention belongs to ventilation and air conditioning system technical field of construction, especially relate to a kind of ventilation and air conditioning system offset-type airduct Anti-air-leakage structure and airduct tube coupling processing method.

Background technology

Ventilation and air conditioning system is made up of ventilating system and air conditioning system, and wherein ventilating system is made up of blowing and discharging fan, airduct, airduct parts, acoustic filter etc.；And air conditioning system is by air conditioner cold-heat source, air processing machine, airflow pipe conveying and distribution, and air-conditioning automatically controlling and the composition such as adjustment indoor temperature, humidity, air velocity and cleannes.Now, the energy consumption that ventilation and air conditioning system is wasted because leaking out is undoubtedly a key component of building energy consumption.Ventilation and air conditioning system is because of reasons such as system line length, element are many, airduct is shell splicing construction and medium differential pressure is big, and it is normal for leaking out on a small quantity, but excessive leaking out, influence whether the realization of whole system function and a large amount of wastes of the energy.When ventilation and air conditioning system is carried out system debug, there will be severe the phenomenon that least significant end air outlet adjusts not air-out most, generally all can suspect device parameter selection of small or the reason such as SR is bigger.

The tightness of ventilation and air conditioning system concerns energy-saving and cost-reducing and room ventilation quality guarantee, and ventilation and air conditioning system is leaked out and consumption reduction is studied by industry technology personnel always for many years.Increasing scholar will reduce the ventilation and air conditioning system energy consumption main means as building energy conservation.Air conditioner air-line system air quantity leakage control technology is the key measure controlling energy saving of system during unit in charge of construction constructs at the scene.Wherein, the discovery of metal bellows machinery seaming forming technique, the altogether three big new techniques such as plate Flange joint new technology and the integrated process technology of airduct and innovation, promote industry scientific development, improve manufacturing technology and the equipment of China's metal bellows, the lifting of metal bellows crudy is served qualitative leap, and system air leakage amount is also decreased obviously earlier above.

Along with country continues to carry out energy saving building and green building, ventilation and air conditioning system is had higher requirement, typically have the requirement proposing air-line system unit air volume wasted work rate in GB50189-2015 " public building energy design standard "；Being about in the new edition GB50243 " code for acceptance of construction quality of conditioning works " promulgated, airduct leak test no longer adopts " test of light leak method " and overall application " inleakage test ", and construction technology to be verified by proposition.

Process by preliminary theoretic discussion with to metal bellows, group to the quality tracing of overall process and sci-tech novelty-search are installed, find to yet suffer from some problems in controlling ventilation and air conditioning system and leaking out, be mainly manifested in following five aspects: the first, existing research is unclear to the cognition of the main region of system air leakage；The second, cognition system air leakage affected by the mass defect of the metal bellows each link of production is unclear；3rd, the mechanism of leaking out of key position is lacked thorough theory analysis；4th, do not create the core key technology reducing system air leakage, simply take the passive behaviors such as closure and lack the active conduct that actively adapts to dielectric property and real current situation；5th, be made in research detection system air leakage device many, and study airtight principle and in trying out considerably less.Thus, in order to adapt to the requirement of national green building and environmental protection and energy saving, improve China's air conditioner industry technology quality level, ensure the realization of heating ventilation and air-conditioning systemic-function, reduce energy waste, ventilation and air conditioning system need to be controlled leak out this common quality defect and pertinacious disease, strive reaching to reduce whole system configuration specification and parameter when carrying same air dielectric, to reduce construction unit's investment and operating cost.

Summary of the invention

The technical problem to be solved is in that for above-mentioned deficiency of the prior art, a kind of ventilation and air conditioning system offset-type airduct Anti-air-leakage structure is provided, its simple in construction, reasonable in design and processing and fabricating and easy for installation, result of use good, can effectively reduce the inleakage of ventilation and air conditioning system airduct.

For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of ventilation and air conditioning system offset-type airduct Anti-air-leakage structure, it is characterised in that: include offset-type and seal structure；Described offset-type seals structure and includes offset-type sealing strip, and described offset-type sealing strip is between two flanges of air duct flange；Described air duct flange is be installed on flange on airduct and it is angle steel flange or plate flange altogether, and two described flanges are parallel laying and are fixed by clamping structure or connecting bolt therebetween；Described clamping structure includes the card piece installing being installed on two described flanges；Described airduct is metal bellows；

Described offset-type sealing strip is open type sealing strip or closed type sealing strip；Described open type sealing strip is Ω shape sealing strip, and the shape of cross section of described Ω shape sealing strip is Ω shape, and described Ω shape sealing strip includes arc sealing strip and two, left and right symmetry is connected to the side seal bar below two ends, arc sealing strip left and right；Described closed type sealing strip is O shape sealing strip, and the shape of cross section of described O shape sealing strip is O shape；Described offset-type sealing strip is installed between two described flanges.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage constructs, and it is characterized in that: described offset-type sealing strip laying for a week along described air duct flange；The lateral wall of two described side seal bars is provided with multiple tracks groove；

The external diameter of described O shape sealing strip is Φ 6mm～Φ 16mm and its wall thickness is 1mm～2.5mm.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage constructs, and it is characterized in that: described air duct flange, described offset-type sealing strip and described clamping structure or connecting bolt composition Flanged Connection System；

Described airduct includes main pipe and the arm being connected with described main pipe, passes through to be connected pipe fitting and be attached between described arm with described main pipe, and described connection pipe fitting is elbow, tee T or four-way pipe；Described main pipe and described arm are spliced from front to back by multiple airduct tube couplings；

Described main pipe and described arm are attached each through described Flanged Connection System between adjacent two described airduct tube couplings and between described connection pipe fitting and described main pipe and described arm；Described main pipe and described arm are ventilation duct；Two described flanges of the described Flanged Connection System being connected between adjacent two described airduct tube couplings are separately fixed on the link of two described airduct tube couplings, and two described flanges of the described Flanged Connection System being connected between described connection pipe fitting and described ventilation duct are separately fixed on the described link being connected pipe fitting and described ventilation duct.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage constructs, and it is characterized in that: described air duct flange is angle steel flange；Two described flanges of described angle steel flange are the right angle angle steel outside the link being fixed on airduct tube coupling or described connection pipe fitting, and the link of described airduct tube coupling or described connection pipe fitting is provided with the flanging being fixed on inside described right angle angle steel；The arc sealing strip of described Ω shape sealing strip is positioned at outside flanging, and described arc sealing strip is installed between two described flanges of described angle steel flange, and the side seal bar of described Ω shape sealing strip is installed between the flanging inside two described flanges；Described O shape sealing strip is installed between the flanging inside two described flanges；

It is fixed by connecting bolt between two described flanges, the shank of bolt of described connecting bolt and the perpendicular laying of flange；Described connecting bolt is positioned at outside described offset-type sealing strip.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage constructs, and it is characterized in that: described air duct flange is plate flange altogether；Being provided with the arc sealing strip for Ω shape sealing strip or the sealing strip mounting groove of O shape sealing strip installation on two described flanges of described plate flange altogether, described sealing strip mounting groove is the groove that flange is bent outwardly formation；

Described sealing strip mounting groove is arcuate groove, and the external diameter of described arc sealing strip and O shape sealing strip is all higher than the internal diameter of sealing strip mounting groove.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage construct, it is characterized in that: described airduct tube coupling be rectangular air duct and its by one piece of sheet metal through bending after be spliced or by two pieces of described sheet metals through bending after be spliced；

Splicing seams on described airduct tube coupling is laid along the longitudinal length of airduct tube coupling；Described splicing seams be closure seam and its be seaming seam, described seaming seam adopt seaming be list flat mouth seaming；

When described airduct tube coupling by one piece of described sheet metal through bending after be spliced time, described airduct tube coupling is monolithic sheet material airduct tube coupling, described seaming seam quantity be one and its be laid on a described long limit of airduct tube coupling；

When described airduct tube coupling is spliced after bending by two pieces of described sheet metals, the quantity of described seaming seam is that two and two described occlusion seams are laid on two described long limits of airduct tube coupling respectively.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage constructs, it is characterized in that: described single flat mouth seaming includes inner side U-shaped mouth and the outside U-shaped mouth being engaged with inner side U-shaped mouth, the rear side of described outside U-shaped mouth is provided with and inner side U-shaped mouth carries out spacing gear platform, described gear platform be by outside U-shaped mouth on rear side of described sheet metal curve inwardly formed boss；

Described offset-type sealing strip is divided into the offset-type sealing strip sections of 4 vertical bar shapeds, is attached each through a sealing strip joint between adjacent two described offset-type sealing strip sections.

Above-mentioned ventilation and air conditioning system offset-type airduct Anti-air-leakage constructs, and it is characterized in that: described air duct flange is plate flange altogether；Being fixed by described clamping structure between two described flanges, described card piece installing is be installed on the card article outside two described flanges, and the outer end of two described flanges is the dop through being bent to form；Described clamping structure is jackscrew clamping structure, described jackscrew clamping structure also includes jackscrew, one end of described card article is fixing end for card dress end and its other end, the described card dress end of described card article is the grab through being bent to form, described grab is installed on the dop of a described flange, described jackscrew is arranged on the described fixing end of card article, and the described fixing end of card article is fixedly secured to outside another described flange by described jackscrew.

Meanwhile, the invention also discloses the monolithic sheet material airduct tube coupling processing method that a kind of method step is simple, reasonable in design and processing is easy, result of use is good, it is characterised in that: the method comprises the following steps:

Step one, sheet metal cut: according to inner side U-shaped mouth on airduct tube coupling and the structure of outside U-shaped mouth and size, adopt plate cutting equipment that the both sides up and down of described rectangular metal sheet material are cut respectively, it is thus achieved that two occlusion limits；Further, according to the structure on airduct tube coupling upper flange limit and size, adopt described plate cutting equipment that the both sides, front and back of described rectangular metal sheet material are cut respectively, it is thus achieved that the flange processing limit of two described flanges；Meanwhile, according to the installation position of four ribs on airduct tube coupling, process at two described flanges and limit is respectively cut four otch in parallel laying, it is thus achieved that the sheet material to be processed of airduct tube coupling；

Described sheet material to be processed includes tube coupling body sheet material, two occlusion limits being positioned at the upper and lower both sides of described tube coupling body sheet material and two flange processing limits laying respectively at both sides before and after described tube coupling body sheet material；

Step 2, seaming are processed: in step one two described occlusion limits are carried out seaming processing respectively, it is thus achieved that inner side U-shaped mouth and outside U-shaped mouth；

Step 3, flange processing limit processing: in step one two described flanges are processed limit and is processed respectively, and obtain two described flanges；

Step 4, tube coupling body sheet material bend: process four described otch on limit along flange described in step one, tube coupling body sheet material carry out four bendings, it is thus achieved that the tube coupling body of airduct tube coupling；

Step 5, seaming joint close compacting: by inner side U-shaped mouth and outside U-shaped mouth snapping described in step 2, and adopt compacting machine that inner side U-shaped mouth and outside U-shaped mouth are carried out compaction treatment, complete the course of processing of airduct tube coupling.

Said method, is characterized in that: compacting machine described in step 5 is cantilevered list flat mouth seaming closure seam compacting machine；

Described cantilevered list flat mouth seaming closure seam compacting machine includes frame, rack-mounted entablature, it is positioned at sill immediately below entablature and can carry out, along entablature, the head that moves forward and backward, described head includes support, it is positioned at below support and single flat mouth seaming is carried out the compacting running roller of downward compacting and vertically movable mechanism that is rack-mount and that drive compacting running roller to move up and down, described compacting running roller is arranged on described vertically movable actuator base, described compression roll wheel is positioned at above sill, described compacting running roller is parallel laying with sill, described support is provided with the movable driving mechanism that motivation head carries out moving forward and backward；Described sill is provided with lower mold, described lower mold is parallel laying with sill, the top of described lower mold has the lower indent placed for single flat mouth seaming, and described lower indent is laid along the length direction of sill, and lower indent is positioned at the underface of compacting running roller；Described compacting running roller is the cylindric running roller laid in level, and peripherally disposed on the lateral wall of described cylindric roller have belling platform under annular, and under described annular, belling platform is positioned at the surface of lower indent；The left and right sides of described sill is respectively arranged with the many airduct pressure pins that airduct tube coupling carries out horizontal support, and described airduct pressure pin is that level is laid；Multiple described airduct pressure pins are all laid in same level, and the upper surface of multiple described airduct pressure pin all with the upper surface flush of lower mold.

The present invention compared with prior art has the advantage that

1, adopted ventilation and air conditioning system offset-type airduct Anti-air-leakage structure simple in construction, reasonable in design and processing and fabricating is easy, input cost is relatively low.

2, the offset-type gasket structure adopted is simple, process easy and economical and practical, good sealing effect, has sealing compensation function.This offset-type sealing strip includes open type sealing strip and closed type sealing strip two kinds, fixing simplicity, and result of use is good.Wherein, the unit weight of closed type sealing strip is light and cost is low, only need in flange one side bonding or at monolateral 2～3 point bondings, easy for installation and difficult drop-off time actually used.It addition, inleakage and the making of flange, group to and the installation quality degree of association not high, have that cost is low, environmental protection, the outstanding feature such as energy-conservation.

3, simple in construction, reasonable in design and processing and fabricating is easy, input cost is relatively low.

4, adopted the simple in construction of single flat mouth seaming and opening convenient, mutually spliced conveniently.

5, the single flat mouth seaming adopted includes inner side U-shaped mouth and the outside U-shaped mouth being engaged with inner side U-shaped mouth, the rear side of outside U-shaped mouth is provided with and inner side U-shaped mouth is carried out spacing gear platform, both overcome longitudinally guiding line midway when traditional single flat mouth seaming shapes to disappear and easy sideslip, cause airduct that concentric reducer occurs, with flange assembling difficulty, the problem such as scrap with flange excesssive gap even sheet material, the problem easily occurring after effectively solving again single flat mouth seaming joint close breaking off relations, thus can effectively increase keying strength, and can ensure that sealing effectiveness, can effectively solve existing rectangular metal airduct to adopt what exist when joint angle seaming or press-button type seaming can not eliminate sheet material interlayer spacings, leak out in stacking gap, the problems such as sealing effectiveness difference.

6, monolithic sheet material airduct tube coupling processing method is simple, simple for production and result of use is good, when the specification of rectangular air duct is less, one piece of sheet metal is adopted to bend and be spliced, four corners adopt 90 ° of bendings to form, and a closure seam adopts single flat mouth seaming and is arranged on the big limit zone line of airduct body；When the specification of rectangular air duct is bigger, adopting two pieces of sheet metals bend and be spliced, four corners adopt 90 ° of bendings to form, and two closure seam all adopt single flat mouth seaming and are laid in the zone line on two big limits of airduct body respectively.The section form of traditional rectangular metal bellows is as follows: when airduct specification is less, adopts one piece of sheet metal bend and be spliced, and three corners adopt 90 ° of bendings to form, and a closure seam adopts joint angle seaming；When airduct specification is bigger, version is two-piece type, and two corners adopt 90 ° of bendings to form, two closure seam adopt joint angle seamings；When airduct specification is bigger, adopting two pieces of sheet metals bend and be spliced, two corners adopt 90 ° of bendings, and two closure seam adopt joint angle seaming；Time actually used, above-mentioned joint angle seaming exist can not eliminate sheet material interlayer spacings, can not the problems such as fore shaft, sealing effectiveness be poor completely.Compared with traditional rectangular metal bellows, the single flat mouth seaming adopted has the advantage that first, processes easy and good sealing effect, and rectangular metal airduct adopts single flat mouth seaming as closure seam, can ensure that the size of airduct is accurate, makes airduct crudy stablize；Further, rely on sheet material to connect and can realize sealing structure；The actual course of processing is easy, after inner side U-shaped mouth splices with outside U-shaped mouth, the hand-held lumps of wood beats or after compacting machine rolling joint close, compared with joint angle seaming and press-button type seaming, the present invention is adopted the sealed pathway length of single flat mouth seaming the longest, just realizes the airtight result of the best when normal construction without supplementary seal approach such as fluid sealant filletings；The second, the change of air duct board thickness on sealing effectiveness without impact.Although sheet metal thickness is relatively thin, interlayer spacings and opening in single flat mouth seaming become big, but all interlayer spacings all eliminate after splicing joint close, and the length of sealed pathway is only had trace to affect by mismachining tolerance during seaming rolling forming；3rd, closure seam is laid at airduct big limit zone line and can be remarkably reinforced airduct rigidity, for saving space, rectangular metal airduct is mostly in flat structure, big limit is horizontal up and down, Chang Yinwei sheet material insufficient rigidity and drop, thus in construction adopt plate faces beading to reinforce more, point reinforces and the means such as housing reinforcing improve big limit rigidity.Adopt single flat mouth seaming can improve one-level as the rectangular metal airduct rigidity of closure seam, permission distance between greatest length or airduct tube wall girth member that airduct pipeline section allows can allocate shifting by standard gauge and increase one-level, decreases girth member material usage and construction work amount when ensureing same stiffness；4th, air duct board consumption can be saved, reduce cost: adopt single flat mouth seaming as the rectangular metal airduct of closure seam, airduct corner is because adopting 90 ° of bendings to form, and bending consumption reduces 37mm and single flat mouth seaming 12mm shorter in joint angle seaming length of run；Being computed the rectangular air duct for being spliced after bending by one piece of sheet metal, seaming materials consumption reduces 123mm；For the rectangular air duct being spliced after bending by two pieces of sheet metals, seaming materials consumption reduces 98mm.

7, adopted cantilevered list flat mouth seaming closure seam compacting machine simple in construction, reasonable in design and processing and fabricating is easy, input cost is relatively low.This cantilevered list flat mouth seaming closure seam compacting machine uses easy and simple to handle and result of use good, practical value is high, it is particularly suited on long limit and lays single flat mouth seaming seaming seam compaction treatment process as the rectangular metal airduct of closure seam, rectangular metal airduct dismounting simplicity, rectangular metal airduct is positioned in lower mold, and list flat mouth seaming is placed in lower indent, press down compacting running roller afterwards, and drive head forward horizontal on entablature to move, just the compaction treatment process of single flat mouth seaming closure seam can be automatically performed, and four stackings are added the compacting of sheet material gap leak out hidden danger stopping airduct body closure seam being perpendicular to sheet material direction during compaction treatment.Adopted cantilevered list flat mouth seaming closure seam compacting machine applied widely and use easy and simple to handle, length and the long hem width degree of machined rectangular metal airduct are unrestricted, controlled the open angle of airduct pressure pin by rotating air-duct pressure pin in the horizontal plane, then can easy, quickly meet the compacting demand of the rectangular metal airduct on the long limit of different in width.Thus, the use of this cantilevered list flat mouth seaming closure seam compacting machine is easy and simple to handle, result of use good, it is exclusively used in the compaction treatment of single flat mouth seaming closure seam of rectangular metal airduct, can effectively eliminate the sheet material interlayer spacings of single flat mouth seaming closure seam, and ensure sealing effectiveness.

Below by drawings and Examples, technical scheme is described in further detail.

Accompanying drawing explanation

Fig. 1-1 by existing metal bellows corner stitch the structural representation of employing press-button type seaming.

Fig. 1-2 by existing metal bellows corner stitch the structural representation of employing joint angle seaming.

Fig. 1-3 is adopted the structural representation of single flat mouth seaming for existing metal bellows splicing seams.

Fig. 1-4 is adopted the structural representation of single flat mouth seaming for the present invention.

Fig. 2-1 is the structural representation of plate Flanged Connection System altogether between existing metal bellows tube coupling.

Fig. 2-2 is the structural representation of angle steel flange connection system between existing metal bellows tube coupling.

Fig. 3-1 is the cross-sectional structure schematic diagram of Ω shape sealing strip of the present invention.

Fig. 3-2 is the cross-sectional structure schematic diagram of O shape sealing strip of the present invention.

Fig. 4-1 is the end construction schematic diagram of monolithic sheet material airduct tube coupling of the present invention.

Fig. 4-2 is the end construction schematic diagram of two boards material airduct tube coupling of the present invention.

Fig. 5-1 is the connection status schematic diagram of Ω shape sealing strip plate flange together of the present invention.

Fig. 5-2 is the connection status schematic diagram of Ω shape sealing strip of the present invention and angle steel flange.

Fig. 5-3 be Ω shape sealing strip plate flange together of the present invention with the use of time compensating coefficient schematic diagram.

Fig. 5-4 be Ω shape sealing strip of the present invention with angle steel flange with the use of time compensating coefficient schematic diagram.

Fig. 6-1 is the connection status schematic diagram of O shape sealing strip plate flange together of the present invention.

Fig. 6-2 is the connection status schematic diagram of O shape sealing strip of the present invention and angle steel flange.

Fig. 6-3 be O shape sealing strip plate flange together of the present invention with the use of time compensating coefficient schematic diagram.

Fig. 6-4 be O shape sealing strip of the present invention with angle steel flange with the use of time compensating coefficient schematic diagram.

Fig. 7 is the installation position schematic diagram of L-shaped girth member outside flange of the present invention.

Fig. 8 is the connection status schematic diagram of O shape sealing strip of the present invention and sealing strip joint.

Fig. 9 is the structural representation of sealing strip joint of the present invention.

Figure 10 is the processing method FB(flow block) of monolithic sheet material airduct tube coupling of the present invention.

Figure 11 is the structural representation of the sheet material to be processed of monolithic sheet material airduct tube coupling of the present invention.

Figure 12 is the machining state schematic diagram after inner side U-shaped mouth and the outside U-shaped mouth of monolithic sheet material airduct tube coupling of the present invention machines.

Figure 13 is the use state reference map of cantilevered list flat mouth seaming closure seam compacting machine of the present invention.

Figure 14 is the cantilevered list flat mouth seaming closure seam compacting machine of the present invention structural representation except linking arm.

Figure 15 is the close-up schematic view at A place in Figure 14.

Description of reference numerals:

1 airduct tube coupling；2 flanges；2-1 dop；

3 O shape sealing strips；4 flangings；5 Ω shape sealing strips；

5-1 arc sealing strip；5-2 side seal bar；6 connecting bolts；

7 press-button type seamings；8 fastening bolts；9 mounting grooves；

10-1 card article；10-2 jackscrew；11 single flat mouth seamings；

U-shaped mouth inside 11-1；U-shaped mouth outside 11-2；11-3 keeps off platform；

12-1 is engaged limit；12-2 flange processing limit；12-3 otch；

12-4 tube coupling body sheet material；13 joint angle seamings；

14-2 limit switch；14-3 entablature；14-4 directive wheel；

14-5 handwheel；14-6 transmission band；14-7 drive motor；

14-8 lance；14-9 tooth bar；14-10 head；

The vertical guide post of 14-11；14-12 compacting running roller；14-13 pressure pin seat；

14-14 lower mold；14-15 the first drive；14-16 gear；

14-17 the second drive；14-18 airduct pressure pin；14-19 connecting pin；

14-20 bearing pin；14-21 handle；14-22 sill；

14-23 linking arm；14-24 frame；Indent under 14-25；

14-26 support；Belling platform under 14-27 annular；Pressure rack under 14-28 level；

15 L-shaped girth members；16 sealing strip joint 17 alligator clamps.

Detailed description of the invention

As shown in Fig. 5-1, Fig. 5-2, Fig. 6-1 and Fig. 6-2, ventilation and air conditioning system offset-type airduct Anti-air-leakage of the present invention constructs, and seals structure including offset-type；Described offset-type seals structure and includes offset-type sealing strip, and described offset-type sealing strip is between two flanges 2 of air duct flange；Described air duct flange is be installed on flange on airduct and it is angle steel flange or plate flange altogether, and two described flanges 2 are fixed in parallel laying and therebetween by clamping structure or connecting bolt 6；Described clamping structure includes the card piece installing being installed on two described flanges 2；Described airduct is metal bellows.

Described offset-type sealing strip is open type sealing strip or closed type sealing strip；As shown in figure 3-1, described open type sealing strip is Ω shape sealing strip 5, the shape of cross section of described Ω shape sealing strip 5 is Ω shape, and described Ω shape sealing strip 5 includes arc sealing strip 5-1 and two, left and right symmetry is connected to the side seal bar 5-2 below arc sealing strip about 5-1 two ends；As shown in figure 3-2, described closed type sealing strip is O shape sealing strip 3, and the shape of cross section of described O shape sealing strip 3 is O shape；Described offset-type sealing strip is installed between two described flanges 2.

In the present embodiment, described offset-type sealing strip laying for a week along described air duct flange.

Actual add man-hour, the lateral wall of two described side seal bar 5-2 is provided with multiple tracks groove.

In the present embodiment, the described groove that the lateral wall of described side seal bar 5-2 is arranged is rectangular channel, and groove described in multiple tracks is parallel laying.

Thus, the outer side wall surface of two described side seal bar 5-2 is corrugated surface, and the outer side wall surface of described arc sealing strip 5-1 is bright finish.Further, the interior side-wall surface of described Ω shape sealing strip 5 is bright finish.

Time actually used, described air duct flange, described offset-type sealing strip and described clamping structure or connecting bolt 6 form Flanged Connection System；

Described airduct includes main pipe and the arm being connected with described main pipe, passes through to be connected pipe fitting and be attached between described arm with described main pipe, and described connection pipe fitting is elbow, tee T or four-way pipe；Described main pipe and described arm are spliced from front to back by multiple airduct tube couplings 1；

Described main pipe and described arm are attached each through described Flanged Connection System between adjacent two described airduct tube couplings 1 and between described connection pipe fitting and described main pipe and described arm；Described main pipe and described arm are ventilation duct；Two described flanges 2 of the described Flanged Connection System being connected between adjacent two described airduct tube couplings 1 are separately fixed on the link of two described airduct tube couplings 1, and two described flanges 2 of the described Flanged Connection System being connected between described connection pipe fitting and described ventilation duct are separately fixed on the described link being connected pipe fitting and described ventilation duct.

In the present embodiment, as shown in Fig. 5-1 and Fig. 6-1, described air duct flange is plate flange altogether；Being provided with the arc sealing strip 5-1 for Ω shape sealing strip 5 or the sealing strip mounting groove 9 of O shape sealing strip 3 installation on two described flanges 2 of described plate flange altogether, described sealing strip mounting groove 9 is the groove that flange 2 is bent outwardly formation.

Described sealing strip mounting groove 9 is arcuate groove, and the external diameter of described arc sealing strip 5-1 and O shape sealing strip 3 is all higher than the internal diameter of sealing strip mounting groove 9.

In the present embodiment, described airduct tube coupling 1 is rectangular air duct.

Time actually used, described airduct tube coupling 1 can also be the other type of airduct such as circular duct, elliptical air.

Actual add man-hour, described airduct tube coupling 1 and its be spliced after bending by one piece of sheet metal or be spliced after bending by two pieces of described sheet metals；

Splicing seams on described airduct tube coupling 1 is laid along the longitudinal length of airduct tube coupling 1；Described splicing seams be closure seam and its be seaming seam, described seaming seam adopt seaming be list flat mouth seaming 11；

When described airduct tube coupling 1 by one piece of described sheet metal through bending after be spliced time, described airduct tube coupling 1 be monolithic sheet material airduct tube coupling, described seaming stitch quantity be one and its be laid on a described long limit of airduct tube coupling 1；

When described airduct tube coupling 1 is spliced after bending by two pieces of described sheet metals, the quantity of described seaming seam is that two and two described occlusion seams are laid on two described long limits of airduct tube coupling 1 respectively.

Four sidewalls of described airduct tube coupling 1 include two broad side walls and two narrow sidewalls, and two described broad side walls are symmetrically laid and two described narrow sidewalls are symmetrically laid, and described long limit is the described broad side walls of airduct tube coupling 1.

In the present embodiment, the both sides, front and back of described airduct tube coupling 1 are provided with flange 2, described flange 2 and the perpendicular laying of airduct tube coupling 1, and described flange 2 is integrated with airduct tube coupling 1 processing and fabricating.

Actual adding man-hour, described airduct tube coupling 1 is integrated with flange 2 processing and fabricating, and the farad limit (also referred to as ring flange) that flange 2 be described common plate flange.

In the present embodiment, as shown in figure 12, the front side of four sidewalls of described airduct tube coupling 1 and rear side are provided with flange 2.

In the present embodiment, as shown in Fig. 4-1, described airduct tube coupling 1 is spliced after bending by one piece of sheet metal, the quantity of described seaming seam be one and its be positioned on a described long limit of airduct tube coupling 1, and this airduct tube coupling 1 is monolithic sheet material airduct tube coupling.

Further, described airduct tube coupling 1 includes tube coupling body, and the rear and front end of described tube coupling body is provided with the flange 2 of a described plate flange altogether, and two described flanges 2 that described tube coupling body rear and front end is arranged symmetrically are laid.

Further, described seaming seam is positioned at the zone line on the described long limit of airduct tube coupling 1.

Actual adding man-hour, as shown in the Fig. 4-2, described airduct tube coupling 1 can also be spliced after bending by two pieces of described sheet metals, and the quantity of described seaming seam is two, and two described seamings seams lay respectively on two described long limits of airduct body 1.Further, two described seamings seam lays respectively at the zone line on two described long limits of airduct body 1.

In the present embodiment, as Figure 1-4, described single flat mouth seaming 11 includes inner side U-shaped mouth 11-1 and the outside U-shaped mouth 11-2 being engaged with inner side U-shaped mouth 11-1, the rear side of described outside U-shaped mouth 11-2 be provided with inner side U-shaped mouth 11-1 is carried out spacing gear platform 11-3, described gear platform 11-3 be by outside U-shaped mouth 11-2 on rear side of described sheet metal curve inwardly formed boss.

In the present embodiment, described gear platform 11-3 is arc.Actual adding man-hour, described gear platform 11-3 can also be other shape.

Further, the space D between in the middle part of described gear platform 11-3 and U-shaped mouth 11-2 front end, outside is 12mm～18mm.

In the present embodiment, the space D in the middle part of described gear platform 11-3 and between U-shaped mouth 11-2 front end, outside is 14.5mm.

Actual add man-hour, can according to specific needs, to the space D in the middle part of gear platform 11-3 and between U-shaped mouth 11-2 front end, outside for adjusting accordingly.

As shown in Fig. 5-1 and Fig. 6-1, being fixed by described clamping structure between two described flanges 2, described card piece installing is be installed on the card article 10-1 outside two described flanges 2, and the outer end of two described flanges 2 is the dop 2-1 through being bent to form；Described clamping structure is jackscrew clamping structure, described jackscrew clamping structure also includes jackscrew 10-2, one end of described card article 10-1 is fixing end for card dress end and its other end, the described card dress end of described card article 10-1 is the grab through being bent to form, described grab is installed on the dop 2-1 of a described flange 2, described jackscrew 10-2 is arranged on the described fixing end of card article 10-1, and the described fixing end of card article 10-1 is fixedly secured to outside another described flange 2 by described jackscrew 10-2.

In the present embodiment, described card article 10-1 is L-shaped.

Actual adding man-hour, described card article 10-1 can also adopt other shapes of card dress bar.

In the present embodiment, described jackscrew 10-2 and the perpendicular laying of flange 2.

In the present embodiment, the quantity of described clamping structure is multiple and its laying from front to back for one week along described air duct flange.

A kind of method that described monolithic sheet material airduct tube coupling is processed as shown in Figure 10, comprises the following steps:

Step one, sheet metal cut: according to the inner side structure of U-shaped mouth 11-1 and outside U-shaped mouth 11-2 and size on airduct tube coupling 1, adopt plate cutting equipment that the both sides up and down of described rectangular metal sheet material are cut respectively, it is thus achieved that two occlusion limit 12-1；Further, according to the structure on airduct tube coupling 1 upper flange limit 2 and size, adopt described plate cutting equipment that the both sides, front and back of described rectangular metal sheet material are cut respectively, it is thus achieved that the flange processing limit 12-2 of two described flanges 2；Meanwhile, according to the installation position of four ribs on airduct tube coupling 1, process at two described flanges and limit 12-2 is respectively cut four otch 12-3 in parallel laying, it is thus achieved that the sheet material to be processed of airduct tube coupling 1, refer to Figure 11；

Described sheet material to be processed includes tube coupling body sheet material 12-4, two occlusion limit 12-1 being positioned at the upper and lower both sides of described tube coupling body sheet material 12-4 and two flange processing limit 12-2 laying respectively at both sides before and after described tube coupling body sheet material 12-4；

Step 2, seaming are processed: in step one two described occlusion limit 12-1 are carried out seaming processing respectively, it is thus achieved that inner side U-shaped mouth 11-1 and outside U-shaped mouth 11-2；

Step 3, flange processing limit processing: in step one two described flanges are processed limit 12-2 and is processed respectively, and obtain two described flanges 2；

Step 4, tube coupling body sheet material bend: process four described otch 12-3 on the 12-2 of limit along flange described in step one, tube coupling body sheet material 12-4 carry out four bendings, it is thus achieved that the tube coupling body of airduct tube coupling 1；

Step 5, seaming joint close compacting: by inner side U-shaped mouth 11-1 and outside U-shaped mouth 11-2 snapping described in step 2, and adopt compacting machine that inner side U-shaped mouth 11-1 and outside U-shaped mouth 11-2 is carried out compaction treatment, complete the course of processing of airduct tube coupling 1.In the present embodiment, by inner side U-shaped mouth 11-1 described in step 2 with after the U-shaped mouth 11-2 snapping of outside, complete the joint close process of single flat mouth seaming 11.

In the present embodiment, step 3 carries out flange processing limit and adds man-hour, adopt rolling technology once by flange 2 machine-shaping.

Actual adding man-hour, the seaming of described airduct tube coupling 1 seams to be put on the corner, and fixes L-shaped girth member 15 respectively in the corner, inner side of described flange 2 after joint close.In the present embodiment, described L-shaped girth member 15 is be assembled in the corner brace of corner inside flange 2, and is fixed by fixing bolt between described corner brace and flange 2, refers to Fig. 7.

Further, for covering described occlusion seam, also devise stiffening plate at the back side of flange 2, and make stiffening plate and flange 2 carry out multiple spot impermeable riveting in the employing of stiffening plate region without rivet technique.

As shown in Figure 8, for processing simplicity, described offset-type sealing strip is divided into the offset-type sealing strip sections of 4 vertical bar shapeds, is attached each through a sealing strip joint 16 between adjacent two described offset-type sealing strip sections.Described sealing strip joint 16 is 90 ° of elbows, and the offset-type sealing strip sections of 4 vertical bar shapeds is formed by connecting a spliced sealing strip of rectangle by 4 described sealing strip joints 16, described sealing strip joint 16.As it is shown in figure 9, described sealing strip joint 16 is the interface that arc-shaped joint and its rear and front end are provided with confession described offset-type sealing strip sections installation.Described sealing strip joint 16 is a hollow pipe being of a size of Φ 9mm × 15mm and 90 ° of elbows that its radius is 12mm.After four described offset-type sealing strip sections block by the specification of airduct tube coupling 1, insert respectively in sealing strip joint 16, i.e. one sealing chain supporting with described air duct flange of composition.

So, adopt the present invention by being respectively provided with sealing strip joint 16 between the corner of two described flanges 2, eliminated adpting flange corner in traditional handicraft and adopted fluid sealant to fill up and drawback to ventilation and air conditioning system and environment.In order to enable described corner brace to hold sealing strip joint 16, the corresponding arc groove having for sealing strip joint 16 installation in described corner brace.Meanwhile, on each described flange 2, a little fluid sealant of corresponding painting, is bonded on flange 2 by the sealing chain assembled, and each interface only bonds on flange 2, and described air duct flange group is to very easy.

In the present embodiment, compacting machine described in step 5 is cantilevered list flat mouth seaming closure seam compacting machine；

nullSuch as Figure 13、Shown in Figure 14 and Figure 15，Described cantilevered list flat mouth seaming closure seam compacting machine includes frame 14-24、It is arranged on the entablature 14-3 on frame 14-24、It is positioned at sill 14-22 immediately below entablature 14-3 and can carry out, along entablature 14-3, the head 14-10 that moves forward and backward，Described head 14-10 includes support 14-26、It is positioned at below support 14-26 and single flat mouth seaming 14-11 is carried out the compacting running roller 14-12 of downward compacting and is arranged on support 14-26 and drives the compacting running roller 14-12 vertically movable mechanism moved up and down，Described compacting running roller 14-12 is arranged on described vertically movable actuator base，Described compacting running roller 14-12 is positioned at above sill 14-22，Described compacting running roller 14-12 and sill 14-22 is parallel laying，Described support 14-26 is provided with the motivation head 14-10 movable driving mechanism carrying out moving forward and backward；Described sill 22 is provided with lower mold 14-14, described lower mold 14-14 and sill 14-22 is parallel laying, the top of described lower mold 14-14 has the lower indent 14-25 placed for single flat mouth seaming 11, described lower indent 14-25 lays along the length direction of sill 14-22, and lower indent 14-25 is positioned at the underface of compacting running roller 14-12；Described compacting running roller 14-12 is the cylindric running roller laid in level, and peripherally disposed on the lateral wall of described cylindric roller have belling platform 14-27 under annular, and under described annular, belling platform 14-27 is positioned at the surface of lower indent 14-25；It is that level is laid that the left and right sides of described sill 14-22 is respectively arranged with the many airduct pressure pin 14-18 that airduct tube coupling 1 carries out horizontal support, described airduct pressure pin 14-18；Multiple described airduct pressure pin 14-18 are all laid in same level, and the upper surface of multiple described airduct pressure pin 14-18 all with the upper surface flush of lower mold 14-14.

In the present embodiment, described cantilevered list flat mouth seaming closure seam compacting machine also includes being arranged on the anterior linking arm 14-23 of entablature 14-3 in hinged way, one end of described linking arm 14-23 is hinged end and its other end is pin end, it is anterior that the hinged end of described linking arm 14-23 is arranged on entablature 14-3 by jointed shaft, and the pin end of described linking arm 14-23 and anterior all the having of sill 14-22 supply the bearing pin 14-20 pin-and-hole installed.

In the present embodiment, the left and right sides sidewall of described entablature 14-3 being provided with the pressure pin seat 14-13 that multiple air feed conduit saddle bar 14-18 the inner is installed, described airduct pressure pin 14-18 the inner is arranged on pressure pin seat 14-13 in hinged way.

Further, by being vertically attached to the connecting pin 14-19 laid between described airduct pressure pin 14-18 and pressure pin seat 14-13.

Time actually used, described airduct pressure pin 14-18 can rotate in the horizontal plane around connecting pin 14-19.

In the present embodiment, the left and right sides of described sill 14-22 is respectively arranged with three airduct pressure pin 14-18, and the airduct pressure pin 14-18 that the sill 14-22 left and right sides is arranged symmetrically lays.

Time actually used, can according to specific needs, the quantity of airduct pressure pin 14-18 set by the sill 14-22 left and right sides and the installation position of Ge Gen airduct pressure pin 14-18 be adjusted accordingly respectively.

In the present embodiment, described frame 14-24 includes horizontal base and is arranged on the vertical upright column on rear side of described horizontal base, described entablature 14-3 and sill 14-22 all lays in level, and described entablature 14-3 and sill 14-22 is respectively positioned on front side of described vertical upright column and the rear end of the two is installed on described vertical upright column.

In the present embodiment, described support 14-26 is cubic type steel bracket.

Time actually used, described support 14-26 can also adopt other type of support framework.

In the present embodiment, described vertically movable mechanism is hand operated shifting mechanisms；Described hand operated shifting mechanisms includes being positioned under the level above support 14-26 pressure rack 14-28, being arranged on above support 14-26 and vertical guide post 14-11 that handwheel 14-5 that under drive level, pressure rack 14-28 moves up and down and two are separately mounted under level the pressure rack 14-28 left and right sides, under described level, pressure rack 14-28 is arranged on handwheel 14-5；The wheel shaft of described compacting running roller 14-12 is that level is laid, and the two ends, wheel shaft left and right of described compacting running roller 14-12 are separately mounted to the bottom of two described vertical guide post 14-11；Two described vertical guide post 14-11 lay respectively at the left and right sides of support 14-26.

In actually used process, described vertically movable mechanism can also adopt electronic travel mechanism.

In the present embodiment, described head 14-10 also includes along the movable upper walking mechanism in entablature 14-3 top with along lower walking mechanism movable bottom entablature 14-3, and described upper walking mechanism is identical with the structure of described lower walking mechanism and both at wheel type traveling mechanism；Described wheel type traveling mechanism includes front side walking mechanism and is positioned at the rear side walking mechanism on rear side of the walking mechanism of described front side, described front side walking mechanism and described rear side walking mechanism and all includes two directive wheels 4 being symmetrically mounted on the internal left and right sides of support 14-26.

During actual installation, described movable driving mechanism and support 14-26 are attached.

Further, described movable driving mechanism includes movable drive mechanism and the drive motor 14-7 being arranged on support 14-26, and described movable drive mechanism is rack and pinion drive mechanism or sprocket chain strip transmission mechanism；It is in transmission connection by pulley transmission mechanism between described movable drive mechanism and drive motor 14-7；

Described rack and pinion drive mechanism includes the gear 14-16 being connected with described pulley transmission mechanism and the tooth bar 9 coordinated with gear 14-16, and described tooth bar 9 is arranged on bottom entablature 14-3；Described sprocket chain strip transmission mechanism includes the sprocket wheel being connected with described pulley transmission mechanism and the chain coordinated with described sprocket wheel, and described chain is arranged on bottom entablature 14-3.

During actual installation, the first drive 14-15 that described pulley transmission mechanism includes being coaxially mounted on the power output shaft of drive motor 14-7 and carried out the second drive 14-17 being in transmission connection by transmission with 14-6 and the first drive 14-15；Described gear 14-16 or described sprocket coaxiality are arranged on the wheel shaft of the second drive 14-17.

In the present embodiment, described movable drive mechanism is rack and pinion drive mechanism.

Time actually used, described movable drive mechanism can also adopt other type of drive mechanism.

Simultaneously, described cantilevered list flat mouth seaming closure seam compacting machine also includes two limit switch 14-2, two described limit switch 14-2 lay respectively at and are laid in front limit switch anterior for entablature 14-3 and are positioned at the rear limit switch at entablature 14-3 rear, and described rear limit switch is arranged on frame 14-24.

In the present embodiment, described rear limit switch is arranged on described vertical upright column.

Meanwhile, the both sides, front and back of described support 14-26 be respectively arranged with described front limit switch and described rear limit switch with the use of lance 14-8, described lance 14-8 be level laying and its be positioned at above entablature 14-3.

In the present embodiment, the pin joint axle of described linking arm 14-23 is provided with handle 14-21.

Actual adding man-hour, described single flat mouth seaming 11 is positioned on the long limit of airduct tube coupling 1.Four sidewalls of described airduct tube coupling 1 include two broad side walls and two narrow sidewalls, and two described broad side walls are symmetrically laid and two described narrow sidewalls are symmetrically laid, and described long limit is the described broad side walls of airduct tube coupling 1.

In the present embodiment, described entablature 14-3 and sill 14-22 is rectangular steel pipe.

Time actually used, the work process of described cantilevered list flat mouth seaming closure seam compacting machine is as follows:

Step A, the bearing pin 14-20 extracted between linking arm 1 and sill 14-22, linking arm 1 is rotated up 180 ° by hand-held handle 14-21, makes to be become open state from closed configuration between entablature 14-3 and sill 14-22 front portion；

Step B, width according to the described long limit of airduct tube coupling 1,6 described airduct pressure pin 14-18 are rotated in the horizontal plane, the two described airduct pressure pin 14-18 making symmetrical laying are that splayed is laid, again airduct tube coupling 1 is supported on lower mold 14-14, and making single flat mouth seaming 11 embed in lower indent 14-25, airduct tube coupling 1 is supported by 6 described airduct pressure pin 14-18；

Step C, linking arm 14-23 being rotated down 180 °, the Guan Bi completing entablature 14-3 and sill 14-22 is connected；

Step D, rotation hand wheel 14-5, and make compacting running roller 14-12 compress downwards single flat mouth seaming 11 by two described vertical guide post 14-11；

Step E, startup drive motor 14-7, and matched by described pulley transmission mechanism and described movable drive mechanism, drive head 14-10 entablature 14-3 by after move forward, in head 14-10 moving process, drive compacting running roller 14-12 along single flat mouth seaming 11 rolling straight forward, and complete the splicing compacting process of single flat mouth seaming 11.

In actually used process, described front limit switch and rear limit switch are all connected with to the drive motor 14-7 controller being controlled.When running and lance 14-8 shock described front limit switch anterior to entablature 14-3 as head 14-10, head 14-10 operation stops and snap back moves, until lance 14-8 clashes into the stopping of described rear limit switch.

To sum up, adopt described cantilevered list flat mouth seaming closure seam compacting function to carry out compaction treatment to long limit is laid single flat mouth seaming 11 airduct tube coupling 1 as closure seam, and four stackings are added the compacting of sheet material gap leak out hidden danger stopping airduct body closure seam being perpendicular to sheet material direction.

Actual adding man-hour, as shown in figure 3-1, the profile of described Ω shape sealing strip 5 is Ω shape, the thickness of Ω shape sealing strip 5 uniformly and its thickness be 1.5mm, the material of described Ω shape sealing strip 5 be rubber and its there is certain elasticity.Meanwhile, the lateral wall design of described side seal bar 5-2 has the strip ripple that width is 1mm and width is 0.2mm (i.e. the cross sectional dimensions of described rectangular recess), with binding agent on the lateral wall of described side seal bar 5-2.Time actually used, described Ω shape sealing strip 5 is by the medial wall bonding of the described flange 2 of plate flange altogether outside side seal bar 5-2, and sealing strip material is supporting according to code requirement and pumped (conveying) medium.

In the present embodiment, the distance of the tube wall from airduct tube coupling 1 of described mounting groove 9 is 11.5mm.Further, actual add man-hour, can according to specific needs, the mounting groove 9 installation position on flange be adjusted accordingly.

Time actually used, the described Ω shape sealing strip 5 obturation effect under the described normal connection status of plate flange altogether is superior.The internal diameter of the arc sealing strip 5-1 of described Ω shape sealing strip 5 is Φ 5.8mm, and the internal diameter of described mounting groove 9 is consistent with the external diameter of arc sealing strip 5-1.Therefore, as shown in fig. 5-1, under the described altogether normal connection status of plate flange, two described side seal bar 5-2 of described Ω shape sealing strip 5 are pressed and together, and arc sealing strip 5-1 is tightened in mounting groove 9 set on flange 2, forms such as hollow bean sprout shape and seal route.Because of the elastic recovery characteristic effect of Ω shape sealing strip 5, fit tightly with mounting groove 9 inwall on two flanges 2.Further, joint place is arc-shaped sealed pathway, and sealing effectiveness significantly improves than traditional strip sealing strip.

It addition, under described plate flange exception connection status altogether, described Ω shape sealing strip 5 shows and significantly compensates performance.As shown in Fig. 5-3, between two flanges 2 of described altogether plate flange because of processing, assemble, install, safeguard and running occur the reason such as error, deformation can not keeping parallelism and when tenesmus occurs, in closed configuration between two flanges 2 of opening-like state and airduct tube coupling 1 bottom between two flanges 2 on airduct tube coupling 1 top.

Between two flanges 2 during opening-like state, two described side seal bar 5-2 of described Ω shape sealing strip 5 open, pumped (conveying) medium enters Ω shape sealing strip 5 along the space in the middle of two described side seal bar 5-2, and makes Ω shape sealing strip 5 inner chamber fill under pressure and be close to flange 2 medial wall of described plate flange altogether.Further, pumped (conveying) medium pressure is more big, pastes more tight, and sealing effectiveness is more good；

Time between two flanges 2 in closed configuration, two of Ω shape sealing strip 5 described side seal bar 5-2 are compressed by two flanges 2, two described side seal bar 5-2 seal as traditional strip gasket bar, but the arc sealing strip 5-1 of Ω shape sealing strip 5 is under foregoing elastic recovery characteristic effect, plays double sealing effect；

So, between two described flanges 2 from top to bottom in by opening to the transitive state gradually remained silent, its sealing mechanism also mainly sealed by the inner chamber of Ω shape sealing strip 5 be progressively switch to two by Ω shape sealing strip 5 described side seal bar 5-2 and inner chamber associating sealing function.

When particularly the spacing of two described flanges 2 is more than minimum seal distance, traditional sealing strip substantially loses sealing function.But owing to the radius of arc sealing strip 5-1 of Ω shape sealing strip 5 is more than the radius of mounting groove 9, arc sealing strip 5-1 has certain length in the savings of mounting groove 9 part, even if two described airduct tube couplings 1 pull open a determining deviation, all the time build " curved wall " of one leakproof between two described flanges 2, ensured that sealing function renews.

Actual adding man-hour, the external diameter of described O shape sealing strip 3 is Φ 6mm～Φ 16mm and its wall thickness is 1mm～2.5mm.

In the present embodiment, the profile of described O shape sealing strip 3 is O shape, and the external diameter of O shape sealing strip 3 is Φ 12mm and its wall thickness is 1.5mm, smooth outer surface.Thus, the profile of described O shape sealing strip 3 is simple, materials are economized and cost is low, actual practical.

Time actually used, the taping process of described O shape sealing strip 3 is simple and efficient, only need to the middle inside of mounting groove 9 on a described flange 2 of described altogether plate flange and three, two ends position temporary adhesion fix during installation, glue consumption reduces more than 98% than Ω shape sealing strip 5, more energy-conserving and environment-protective.

Time actually used, the described O shape sealing strip 3 obturation effect under the described normal connection status of plate flange altogether is superior.As in Figure 6-1, under the described normal connection status of plate flange altogether, O shape sealing strip 3 upper and lower both sides under the squeezing action of the described mounting groove 9 of plate flange altogether are all extruded, and are formed such as dish cross section sealing route.Because of the elastic recovery characteristic effect of O shape sealing strip 3, fitting tightly with the medial wall of the mounting groove 9 arranged on two flanges 2, and joint place is curve-seal path, sealing effectiveness significantly improves than conventional band sealing strip.

It addition, under described plate flange exception connection status altogether, described O shape sealing strip 3 shows and significantly compensates performance.As shown in Fig. 6-3, between two flanges 2 of described altogether plate flange because of processing, assemble, install, safeguard and running occur the reason such as error, deformation can not keeping parallelism and when tenesmus occurs, opening-like state between two flanges 2 on airduct tube coupling 1 top.Pumped (conveying) medium acts on outside the inner circumferential of O shape sealing strip 3, makes O shape sealing strip 3 be adjacent to the upper portion side wall of mounting groove 9 under pressure, and the flap portion of O shape sealing strip 3 is then got in the gap between two described flanges 2, is formed such as lampshade cross section sealing route.Equally, because the external diameter of O shape sealing strip 3 is more than the internal diameter of mounting groove 9, even if two described airduct tube couplings 1 pull open a determining deviation, O shape sealing strip 3 is laterally flattened by pumped (conveying) medium, the height that the flap portion of O shape sealing strip 3 is got between two described flanges 2 in gap decreases, but the upper portion side wall of the mounting groove 9 arranged on flange 2 still tightly blocks O shape sealing strip 3, because this compensatory michanism of O shape sealing strip 3 makes its sealing function will continue to keep.

According to general knowledge known in this field, in the media conveying path of ventilation and air conditioning system except supervisor's (i.e. air main) and arm (i.e. branch's airduct), also by by elbow, carry out back bending, reducing be curved, tee T, four-way pipe etc. combine by actual demands of engineering pipe fitting, be installed on airduct in order to regulate air quantity and close the air-valve of indivedual arm and prevent the various acoustic filters of the incoming indoor of noise, eventually arrive at air port.Except supervisor, arm and various pipe fitting, other system unit and accessory are generally specialized factory and produce, its materials thickness and crudy be high one to two class than airduct all, the airtight performance of housing and the flatness of adpting flange can be trusted substantially, the subject matter existed is system unit and accessory two end flanges mostly is band steel flange or angle steel flange, and the flange installed on airduct mostly is common plate flange.By the media conveying path composition analysis of above-mentioned ventilation and air conditioning system, region of mainly leaking out is positioned on supervisor, arm and various pipe fitting.Being gradually lowered it addition, the operating pressure of ventilation and air conditioning system flows to along pipeline medium, the static pressure of system end arm is minimum, and relative inleakage is also little, therefore air-line system inleakage is studied based on main pipe, and arm is auxiliary.Wherein, main pipe includes supervisor and main.Popular says, supervisor refers to the standpipe or horizontal pipe that in ventilation and air conditioning system, caliber is maximum, and main refers to the caliber horizontal pipe less than supervisor；Arm refers to and is connected the pipeline until end with main, time actually used, and arm.

Reasons of air leakage with regard to metal bellows ontological existence is analyzed below: the main pipe in metal bellows is the important component part carrying air in ventilation and air conditioning system, makes consumption very big.Metal bellows adopts roll bending to be raw material mostly, through plate face leveling, rolling reinforcement, hydraulic punch cut flange square opening and sharp-crested, sheet material cut-outs, airduct longitudinal direction closure seam seaming, flange roll forming, longitudinal corner flanging, longitudinal closure seam joint close and and the technical process such as flange angle assembling, make a joint and save the tube coupling that size, specification, shape are different.It is clear that the airduct body course of processing can produce longitudinal corner seam (or longitudinal closure seam) and horizontal tube coupling combination of interfaces seam.Longitudinal corner seam varies in size maximum three with airduct specification, and longitudinal closure seam only.During for big specification airduct because needing multiple board material splices, also has vertically and horizontally splicing seams.

Metal bellows corner seam (or closure seam) has three kinds of methods of attachment: welding, riveted joint and seaming connect.Because seaming Joining Technology has that intensity height, tightness be good, seaming seam continuous uniform, do not destroy plate surface quality, good looking appearance, is easily achieved the outstanding features such as Mechanized Processing and obtains extensive use.

As shown in Fig. 1-1, Fig. 1-2 and Fig. 1-3, common corner seam (or closure seam) seaming form is joint angle seaming 13 and press-button type seaming 7, and common splicing seams seaming form is single flat mouth seaming.Wherein, the feature of press-button type seaming 7 connects for namely completing plate corner seam after single port being inserted twoport by lumps of wood beating, but because there is the defects such as insert port is normally closed, single port inserts not easily, sealing effectiveness does not ensure, coupling stiffness is low after twoport shapes in this seaming, only for medium low pressure system.After single flat mouth seaming joint close of ingredient, equally also want the hand-held lumps of wood or use special equipment to complete seaming joint close operation.It is widely used because of the feature such as splicing seams four ply, bonding strength height, sealed pathway length, good sealing effect after single flat mouth seaming joint close.

Joint angle seaming 13 is because of insert port normally opened (insert port gap 1～1.2mm) after the shaping of double; two seamings, and it is relatively convenient that single port inserts, but also wants the hand-held lumps of wood or electric hand tool to pull cork cot down and complete seaming joint close after single, double seaming snap-in.For a long time, it is believed that joint angle seaming 13 has the advantages such as coupling stiffness height, sealed pathway length, sealing effectiveness be reliable and is widely used in high, medium and low voltage system.But by deeply examination and on-site verification, joint angle seaming 13 is because of the impact of version, flow forming process and joint close process, and its sealing effectiveness is so not perfect.Especially with airduct materials thickness for 0.75mm for separation, mechanism of leaking out present two kinds multi-form.

Wherein, as sheet metal thickness≤0.75mm, only taking the sealing structure measure that sheet material seaming connects, the inleakage of airduct is relatively large.This is because seaming former is according to the upper thickness limit 1.2mm design in processing sheet metal thickness scope 0.5mm～1.2mm, after the sheet material seaming molding that 0.5mm～0.75mm is thick, arc radius causes too greatly seaming position elastic big, the gap of twoport insert port existence >=1mm, and during twoport seaming molding, there is wrinkling (also known as side wave) because of follow-up buckle in compression in the stretcher strain of cork cot generation.No matter cork cot is all only pulled down and can not be eliminated sheet material interlayer spacings by the hand-held lumps of wood or hand electric linking machine, sheet material seal length is only cork cot length, but because of waveform wrinkle, cork cot can not shorten after stretching, interrupted phenomenon of dehiscing is there will be after joint close, rely on the expection that cork cot seals seriously to give a discount, thus stitch (or closure seam) place at corner and leak out seriously；Because stacking gap is slack and undisciplined, the interrupted opening and closing of cork cot etc. causes the basic reason leaked out when above-mentioned reason is to adopt thin plate processing joint angle seaming 13 to stitch (or closure seam) as corner.

And as sheet metal thickness >=0.75mm, because timber intensity increases, the side wave phenomenon that during seaming molding, cork cot produces reduces.And, single port can not be adjacent to completely with twoport both sides sheet material after inserting, and because cork cot length (i.e. limit lower limb) is only about 8mm, rigidity is bigger, no matter cork cot all can not be pulled down 90 ° and is close to single port by the hand-held lumps of wood or hand electric linking machine completely, rely on the second barrier portion that cork cot seals out of control, same joint close process can not eliminate sheet material interlayer spacings, thus corner seam (or closure seam) is under system pressure-bearing environment and still suffers from air leakage phenomena；Above-mentioned reason be slab when adopting joint angle seaming 13 to stitch (or closure seam) as corner because cork cot slenderness ratio is little, rigidity is big, can not fore shaft and the basic reason leaked out completely after joint close etc..

As shown in the above, rectangular metal airduct body corner seam (or closure seam) adopts joint angle seaming 13 to connect, and when sheet metal thickness is within the scope of 0.5mm～1.2mm, only relies on sealing structure, all can not eliminate hidden danger of leaking out.In the present invention, adopting the method carrying out sealing after seaming stitches and is coated with fluid sealant or patch sealant tape after positive pressure side removes surface dirt and greasy dirt, sealing effectiveness can necessarily be improved.But along with there being the cold and hot conversion blowing brush and medium temperature for a long time of pressure medium, fluid sealant or sealant tape can come off or aging gradually, and natural environment and indoor air quality are all had certain pollution by the production of fluid sealant or sealant tape and use.Described positive pressure side refers to the side (namely near air inlet side) near ventilating system entrance.

Flanged connection system between metal bellows body and airduct tube coupling (especially the airduct tube coupling in main pipe) is two importances leaked out, for metal bellows body, reasons of air leakage essentially consists in corner seam (also referred to as closure seam) or splicing seams.

According to general knowledge known in this field, for flanged connection system (also referred to as Flanged Connection System) between airduct tube coupling in ventilation and air conditioning system, mainly it is made up of sealing gasket and multiple Flange joint parts etc. between tube coupling adpting flange (also referred to as union flange), flange.Traditional Flanged Connection System is between the flange (also referred to as ring flange dish) of airduct tube coupling, adopts strip gasket pad to seal to reduce medium leakage in pipe, as shown in Fig. 2-1 and Fig. 2-2.This sealing structure is well-behaved in each component parts shape of Flanged Connection System, process assembling standard, installation meets the requirements, ventilation and air conditioning system can play sealing function when being in static state well.

But in Practical Project is put into practice, owing to component parts each in Flanged Connection System implements there is factors in link and ventilation and air conditioning system running in processing, assembling, installation, maintenance etc., causing the sealing property some lost of Flanged Connection System, medium amount of leakage increases.

Existing Flanged Connection System mainly has angle steel flange connection system and is total to plate Flanged Connection System two kinds.Wherein, the flange in angle steel flange connection system is angle steel flange, and the flange in plate Flanged Connection System is plate flange altogether altogether.Angle steel flange refers to that by special equipment angle steel or angle bar carried out volume is curved, and the angle steel after processing remains in that two limits of angle steel are vertically 90 °, without turn-ups, and does not have fold.Plate flange is mainly by corner brace, banjo clip altogether, and the ring flange composition being connected with airduct one.Plate flange blast pipe is also called flangeless wind pipe altogether.

For angle steel flange connection system, in angle steel flange assembly welding link, four angle steel caused because of welding deformation are mutually inclined or misalignment, flange group welding crator stay the reasons such as sealing surface does not polish, all the one week sealed gap in two flangeseal faces connected will be made uneven, and sealing gasket consistency of thickness, the one week pressure to sealing gasket of such flange sealing surface and sealing effectiveness are substantially uneven.

For common plate Flanged Connection System, in common plate flange roll forming link, because the angle of Elastic recovery effect flange face Yu airduct tube wall presents pre-large post-small change, and zone line mitre joint is bordering on 90 °.During such Flange joint, plate flange forming error can on the impact of sealed section altogether.Wherein, after altogether in plate flange, two standard flange limits (also referred to as ring flange) match, intermediate cross-section shape (i.e. sealed section shape) is strip, and sealed section and the perpendicular laying of airduct tube coupling.Altogether the forming errors of plate flange is mainly reflected in three below aspect, first, when in common plate flange, two flange ends are relative sealed section be shaped as inverted trapezoidal, namely the faying face of two flanges is reducing (being gradually reduced from outside to inside)；The second, altogether in plate flange two flange head ends relative to time sealed section be shaped as trapezoidal, namely the faying face of two flanges is dehisce (being gradually increased from outside to inside)；3rd, altogether in plate flange two flange first and ends relative to time bar shaped sealed section inclined.Wherein, above-mentioned three kinds of flange seal cross section structures forming errors occur, are all be alternately present on a flange, and namely the shape of sealed section is continually varying.The one week pressure and sealing effectiveness to sealing bedding and padding of flange sealing surface also changes at any time, thus sealing effectiveness is greatly affected.

Actual add man-hour, although use stamping flange angle by force flange head and the tail two ends to be strapped in same plane at corner place, airduct tube coupling two ends, but because the flange between Elastic recovery effect two flange angle still warpage occurs by above-mentioned three kinds of forming errors, and present heeling condition.

Additionally, link is assembled at airduct tube coupling, one week equally distributed multiple bolt is relied on to connect between the flange of angle steel flange, owing to space limits, various quickly, electronic fastening tool cannot put to good use, can only adopting common manual spanner, its inefficiency causes that bolt tightness differs, and even some occasions are only free-hand screws.Particularly airduct local is in the occasion that bulk is limited, and bolt connects operation and is likely to just cannot be carried out；If it is overlapping to meet the overproof flange of foregoing unfitness of butt joint or airduct flange four aperature of angle or corner seaming, between flange one week gap uniformity degree then more it cannot be guaranteed that.Therefore, when airduct tube coupling assembles, the non-fastening area of connecting bolt and because angle steel welding deformation, misalignment or seaming overlap cause that the sealing function of the non-compacted region of sealing gasket is all by some lost.

And connecting except embedded with flange angle, corner and except adopting bolt fastening between the flange of altogether plate flange, all the other flanges are only by the 10mm width top margin outside interrupted alligator clamp 17 clamping flange limit.Plate flange and alligator clamp 17 all adopt roll forming altogether, and its scale error is unavoidable.From implementation result, mainly alligator clamp 17 inner width size plate flange top margin width dimensions together is difficult to mate, if alligator clamp 17 inner width size is big, two flanges are not clamping；If alligator clamp 17 inner width size is little, alligator clamp 17 does not fill；Firmly clamping by force, can cause the upper and lower stagger arrangement of top margin on adjacent flanges limit.As can be seen here, the disadvantage of plate Flange joint is that between airduct tube coupling, the sealing effectiveness of junction fluctuates with common plate flange roll forming quality altogether, and banjo clip (i.e. alligator clamp 17) is without adaptive regulatory function, cause that sealing function is not firm, unstable.

Time actually used, the roll forming quality problems of common plate flange are mainly reflected in common plate flange corner and edge malcompression, altogether plate flange corner are smeared fluid sealant and too much caused local padded so that the gap between flange increases, alligator clamp 17 molding is irregular.

And in the present invention, for the problems referred to above overcoming common plate Flanged Connection System to exist, employing jackscrew clamping structure replaces alligator clamp 17, eliminate the rolling quality impact on sealing effectiveness of alligator clamp 17 plate flange top margin together.With angle steel flange connection, common manual wrench fastening jackscrew is adopted to carry out clamping.

Additionally, in integral hoisting link after the assembling of multiple airduct tube coupling ground in metal bellows, because of the problem such as the skew of airduct suspension centre, inclination, shake in lifting process, suspension and support height differ by force fixing, suspension and support spacing is excessive, between suspension and support airduct Gravitative Loads, airduct surface thermal insulation construction make the reasons such as system weight increase, all misplace causing up and down between two flanges of flange between the curved tenesmus of pipeline or airduct tube coupling, making union flange sealed section is up-small and down-big trapezium structure, causes that union flange bottom half cycle reduces obturation effect because gap strengthens.

Further, run link at ventilation and air conditioning system, when pressure medium is gradually increased, because air-line system is the relatively low sheet metal ghost splicing construction of natural frequency, have pressure medium to flow easily caused by system vibration along airduct inwall.Amplitude and the frequency of the angle steel flange connection system that rigidity is big are less, and airtight performance impact is little；And the rigidity of plate Flanged Connection System is less altogether, particularly flange springs folder 17 is dependent on two flange top margins of elastic clamping union flange, thus unadjustable；During ventilation and air conditioning system vibration, two flanges are with certain upper and lower changing of the relative positions of frequency, and the sealing gasket between flange is worn and torn and thinning repeatedly, and if things go on like this alligator clamp 17 loses clamping action gradually, and the obturation effect between flange constantly reduces.And above procedure increases along with system media pressure and becomes apparent from.Finally, airduct cannot bear the blast of blower fan top gear, air quantity and blast and all can not meet the instructions for use of ventilation and air conditioning system.

As shown in the above, by the reasons of air leakage of ventilation and air conditioning system is analyzed, it is concluded that

The first, ventilation and air conditioning system mainly leak out region on main pipe and various pipe fitting；

The second, during the conventional joint angle seaming 13 of metal bellows body corner seam (or closure seam) because seaming is slack and undisciplined, seaming stacking gap does not eliminate, cork cot or because side wave presents interrupted folding phenomenon or can not be close to single port because slenderness ratio is little and realizes joint close, if the only sealing structure by connecting with sheet material, airduct corner seam (or closure seam) will become the main contributor that airduct body leaks out；

3rd, the airduct tube coupling adpting flange system of metal bellows is in system operation, there is error for implementing link in processing, assembling, installation, maintenance etc. in the reason that inleakage exceeds standard, the sealing surface of two flanges can not keeping parallelism and the thickness being smaller than sealing gasket of the two.

Find following four conclusion by analysis: the first, angle steel flange processing belongs to nonstandard processing operation, and after flange group welding, working face can adopt machining to reach higher flatness, but the rising of cost and work efficiency be slowly difficult to bear；The second, altogether the rolling forming mode that plate flange is interrupted determine section bar front end in the longitudinal direction dehisce, this principle defect of rear end reducing, the present invention adopts bending and forming method to substitute rolling forming mode can greatly reduce this elastic recovery, equally the rising of its cost and work efficiency also slowly be difficult to accept；In addition being total to what the rolling forming error of plate flange top margin and alligator clamp 17 inner chamber size was also difficult to avoid, the machining accuracy improving equipment only can reduce the scope of error；3rd, in airduct tube coupling 1 assembling process because of space limit, the level of skill of operator and work quality is uneven, lack the factors such as efficient specific purpose tool, limit the group lifting to installation quality of airduct tube coupling 1 to a certain extent；4th, assemble and ventilation and air conditioning system runs the dislocation up and down of air duct flange caused by link and the parabola shaped tenesmus of airduct is inevitable at airduct tube coupling 1.According to aforementioned four conclusion, it is unpractical for requiring the sealing surface of two flanges 2 in air duct flange to remain parallel and being smaller than the thickness of sealing gasket, taking the passive behaviors such as closure to improve the seal of air duct flange connection system simply, its effect remains limited.Only actively adapt to airduct pumped (conveying) medium characteristic and take along with the sealing structure of relative position change compensation automatically between flange, desirable sealing effectiveness to be can be only achieved.Offset-type airduct Anti-air-leakage of the present invention structure is then actively adapts to airduct pumped (conveying) medium characteristic and take can along with the sealing structure of the automatic compensation of relative position change between flange, sealing effectiveness is very good, and actually used, input cost is relatively low, processing and fabricating is easy.

Embodiment 2

As shown in Fig. 5-2 and Fig. 6-2, in the present embodiment, the ventilation and air conditioning system offset-type metal bellows Anti-air-leakage adopted constructs as different from Example 1: described air duct flange is angle steel flange；Two described flanges 2 of described angle steel flange are the right angle angle steel outside the link being fixed on airduct tube coupling 1 or described connection pipe fitting, and the link of described airduct tube coupling 1 or described connection pipe fitting is provided with the flanging 4 being fixed on inside described right angle angle steel.

The arc sealing strip 5-1 of described Ω shape sealing strip 5 is positioned at outside flanging 4, described arc sealing strip 5-1 is installed between two described flanges 2 of described angle steel flange, and the side seal bar 5-2 of described Ω shape sealing strip 5 is installed between the flanging 4 inside two described flanges 2；Described O shape sealing strip 3 is installed between the flanging 4 inside two described flanges 2.

In the present embodiment, it is fixed by connecting bolt 6 between two described flanges 2, the shank of bolt of described connecting bolt 6 and the perpendicular laying of flange 2；Described connecting bolt 6 is positioned at outside described offset-type sealing strip.Further, the quantity of described connecting bolt 6 is multiple, multiple described connecting bolts laying from front to back for a week along described air duct flange.

During actual installation, a right-angle side of described right angle angle steel is fixed on airduct tube coupling 1 by fastening bolt 8.

Time actually used, the described Ω shape sealing strip 5 obturation effect under the normal connection status of described angle steel flange is superior.As shown in Fig. 5-2, under the normal connection status of described angle steel flange, two described side seal bar 5-2 of described Ω shape sealing strip 5 are pressed and together, and arc sealing strip 5-1 is tightened in the inner side of flange 2 with flanging 4, forms such as hollow bean sprout shape and seals route.Because of the elastic recovery characteristic effect of Ω shape sealing strip 5, all fitting tightly with the inwall of two flanges 2 and two flangings 4, sealing effectiveness significantly improves than traditional strip sealing strip.

It addition, under described angle steel flange exception connection status, described Ω shape sealing strip 5 shows and significantly compensates performance.As shown in Fig. 5-4, between two flanges 2 of described angle steel flange because of processing, assemble, install, safeguard and running occur the reason such as error, deformation can not keeping parallelism and when tenesmus occurs, in closed configuration between two flanges 2 of opening-like state and airduct tube coupling 1 bottom between two flanges 2.

Between two flanges 2 during opening-like state, two described side seal bar 5-2 of described Ω shape sealing strip 5 open, pumped (conveying) medium enters Ω shape sealing strip 5 along the space in the middle of two described side seal bar 5-2, and makes Ω shape sealing strip 5 inner chamber fill and be close to the medial wall of flanging 4 under pressure.Further, pumped (conveying) medium pressure is more big, pastes more tight, and sealing effectiveness is more good；

Time between two flanges 2 in closed configuration, two of Ω shape sealing strip 5 described side seal bar 5-2 are compressed by two flanges 2, two described side seal bar 5-2 seal as traditional strip gasket bar, but the arc sealing strip 5-1 of Ω shape sealing strip 5 is under foregoing elastic recovery characteristic effect, plays double sealing effect；

So, between two described flanges 2 from top to bottom in by opening to the transitive state gradually remained silent, its sealing mechanism also mainly sealed by the inner chamber of Ω shape sealing strip 5 be progressively switch to two by Ω shape sealing strip 5 described side seal bar 5-2 and inner chamber associating sealing function.

When particularly the spacing of two described flanges 2 is more than minimum seal distance, traditional sealing strip substantially loses sealing function.But owing to the arc sealing strip 5-1 of Ω shape sealing strip 5 savings of the part between two flanges 2 have certain length, even if two described airduct tube couplings 1 pull open a determining deviation, all the time build " curved wall " of one leakproof between two described flanges 2, ensured that sealing function renews.

Time actually used, the taping process of described O shape sealing strip 3 is simple and efficient, only need to fix by temporary adhesion on a described flange 2 of described plate flange altogether during installation, and glue consumption reduces more than 98% than Ω shape sealing strip 5, more energy-conserving and environment-protective.

Time actually used, the described O shape sealing strip 3 obturation effect under the normal connection status of described angle steel flange is superior.As in fig. 6-2, under the normal connection status of described angle steel flange, O shape sealing strip 3 is squeezed into strip hollow seal cross section under the squeezing action of the flanging 4 of described angle steel flange, also due to O shape sealing strip 3 is elastic bigger than ribbon seal, elastic recovery characteristic effect because of O shape sealing strip 3, fitting tightly with the medial wall of the flanging 4 on two flanges 2, sealing effectiveness also significantly improves than conventional band sealing strip.

It addition, under described angle steel flange exception connection status, described O shape sealing strip 3 shows and significantly compensates performance.As shown in Fig. 6-4, between two flanges 2 of described angle steel flange because of processing, assemble, install, safeguard and running occur the reason such as error, deformation can not keeping parallelism and when tenesmus occurs, opening-like state between two flanges 2 on airduct tube coupling 1 top.Pumped (conveying) medium acts on outside the inner circumferential of O shape sealing strip 3, O shape sealing strip 3 is made to be adjacent to the sidewall of flanging 4 under pressure, the flap portion of O shape sealing strip 3 is got in the gap between two described flanges 2, forms such as up-small and down-big Fructus Jujubae shaped cross and seals route.And, even if two described airduct tube couplings 1 pull open a determining deviation, O shape sealing strip 3 is laterally flattened by pumped (conveying) medium, the height that the flap portion of O shape sealing strip 3 is got between two described flanges 2 in gap decreases, but the sidewall of the flanging 4 on flange 2 still tightly blocks O shape sealing strip 3, because this compensatory michanism of O shape sealing strip 3 makes its sealing function will continue to keep.

Thus, when described air duct flange is angle steel flange, described O shape sealing strip 3 is squeezed into up-small and down-big Fructus Jujubae shape, and pumped (conveying) medium acts on the outer rear flank of inner circumferential of O shape sealing strip 3, and the O shape sealing strip 3 of Fructus Jujubae shape is pushed in two-way wedge and pushes away tighter and tighter；Pulling open certain distance between two described airduct tube couplings 1, the extruding degree of O shape sealing strip 3 only diminishes, but the elastic recovery characteristic of O shape sealing strip 3 and two-way wedge sealing principle will not change or lose.

In the present embodiment, the remainder structure of adopted ventilation and air conditioning system offset-type metal bellows Anti-air-leakage structure is all identical with embodiment 1 with annexation.

Hereinafter the characteristic of conventional seals pad with offset-type sealing strip of the present invention (including Ω shape sealing strip 5 and O shape sealing strip 3) being carried out corresponding comparison, comparative result refers to table 1:

Table 1 conventional seals pad and offset-type sealing strip Character Comparison table

The above; it it is only presently preferred embodiments of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure change above example made according to the technology of the present invention essence, all still fall within the protection domain of technical solution of the present invention.

Claims (10)

1. a ventilation and air conditioning system offset-type airduct Anti-air-leakage structure, it is characterised in that: include offset-type and seal structure；Described offset-type seals structure and includes offset-type sealing strip, and described offset-type sealing strip is positioned between two flanges (2) of air duct flange；Described air duct flange is be installed on flange on airduct and it is angle steel flange or plate flange altogether, and two described flanges (2) are fixed in parallel laying and therebetween by clamping structure or connecting bolt (6)；Described clamping structure includes the card piece installing being installed on two described flanges (2)；Described airduct is metal bellows；

Described offset-type sealing strip is open type sealing strip or closed type sealing strip；Described open type sealing strip is Ω shape sealing strip (5), the shape of cross section of described Ω shape sealing strip (5) is Ω shape, and described Ω shape sealing strip (5) includes arc sealing strip (5-1) and two, left and right symmetry is connected to the side seal bar (5-2) below arc sealing strip (5-1) two ends, left and right；Described closed type sealing strip is O shape sealing strip (3), and the shape of cross section of described O shape sealing strip (3) is O shape；Described offset-type sealing strip is installed between two described flanges (2).

2. the ventilation and air conditioning system offset-type airduct Anti-air-leakage structure described in claim 1, it is characterised in that: described offset-type sealing strip laying for a week along described air duct flange；The lateral wall of two described side seal bars (5-2) is provided with multiple tracks groove；

The external diameter of described O shape sealing strip (3) is Φ 6mm～Φ 16mm and its wall thickness is 1mm～2.5mm.

3. the ventilation and air conditioning system offset-type airduct Anti-air-leakage structure described in claim 1 or 2, it is characterised in that: described air duct flange, described offset-type sealing strip and described clamping structure or connecting bolt (6) composition Flanged Connection System；

Described airduct includes main pipe and the arm being connected with described main pipe, passes through to be connected pipe fitting and be attached between described arm with described main pipe, and described connection pipe fitting is elbow, tee T or four-way pipe；Described main pipe and described arm are spliced from front to back by multiple airduct tube couplings (1)；

Described main pipe and described arm are attached each through described Flanged Connection System between adjacent two described airduct tube couplings (1) and between described connection pipe fitting and described main pipe and described arm；Described main pipe and described arm are ventilation duct；Two described flanges (2) of the described Flanged Connection System being connected between adjacent two described airduct tube couplings (1) are separately fixed on the link of two described airduct tube couplings (1), and two described flanges (2) of the described Flanged Connection System being connected between described connection pipe fitting and described ventilation duct are separately fixed on the described link being connected pipe fitting and described ventilation duct.

4. the ventilation and air conditioning system offset-type airduct Anti-air-leakage structure described in claim 3, it is characterised in that: described air duct flange is angle steel flange；Two described flanges (2) of described angle steel flange are the right angle angle steel outside the link being fixed on airduct tube coupling (1) or described connection pipe fitting, and the link of described airduct tube coupling (1) or described connection pipe fitting is provided with the flanging (4) being fixed on inside described right angle angle steel；The arc sealing strip (5-1) of described Ω shape sealing strip (5) is positioned at flanging (4) outside, described arc sealing strip (5-1) is installed between two described flanges (2) of described angle steel flange, and the side seal bar (5-2) of described Ω shape sealing strip (5) is installed between the flanging (4) of two described flange (2) inner sides；Described O shape sealing strip (3) is installed between the flanging (4) of two described flange (2) inner sides；

It is fixed by connecting bolt (6) between two described flanges (2), the shank of bolt of described connecting bolt (6) and flange (2) perpendicular laying；Described connecting bolt (6) is positioned at outside described offset-type sealing strip.

5. the ventilation and air conditioning system offset-type airduct Anti-air-leakage structure described in claim 3, it is characterised in that: described air duct flange is plate flange altogether；Being provided with the arc sealing strip (5-1) for Ω shape sealing strip (5) on two described flanges (2) of described altogether plate flange or sealing strip mounting groove (9) that O shape sealing strip (3) installs, described sealing strip mounting groove (9) is the groove that flange (2) is bent outwardly formation；

Described sealing strip mounting groove (9) is arcuate groove, and the external diameter of described arc sealing strip (5-1) and O shape sealing strip (3) is all higher than the internal diameter of sealing strip mounting groove (9).

6. described in claim 3 ventilation and air conditioning system offset-type airduct Anti-air-leakage structure, it is characterised in that: described airduct tube coupling (1) for rectangular air duct and its by one piece of sheet metal through bending after be spliced or by two pieces of described sheet metals through bending after be spliced；

Splicing seams on described airduct tube coupling (1) is laid along the longitudinal length of airduct tube coupling (1)；Described splicing seams be closure seam and its be seaming seam, described seaming seam adopt seaming be list flat mouth seaming (11)；

When described airduct tube coupling (1) is spliced after bending by one piece of described sheet metal, described airduct tube coupling (1) is monolithic sheet material airduct tube coupling, described seaming seam quantity be one and its be laid on a described long limit of airduct tube coupling (1)；

When described airduct tube coupling (1) is spliced after bending by two pieces of described sheet metals, the quantity of described seaming seam is that two and two described occlusion seams are laid on two described long limits of airduct tube coupling (1) respectively.

7. the ventilation and air conditioning system offset-type airduct Anti-air-leakage structure described in claim 6, it is characterized in that: described single flat mouth seaming (11) includes inner side U-shaped mouth (11-1) and outside U-shaped mouth (11-2) being engaged with inner side U-shaped mouth (11-1), the rear side of described outside U-shaped mouth (11-2) is provided with and inner side U-shaped mouth (11-1) carries out spacing gear platform (11-3), and described gear platform (11-3) is the boss formed that curved inwardly by the described sheet metal of outside U-shaped mouth (11-2) rear side；

Described offset-type sealing strip is divided into the offset-type sealing strip sections of 4 vertical bar shapeds, is attached each through a sealing strip joint (16) between adjacent two described offset-type sealing strip sections.

8. the ventilation and air conditioning system offset-type airduct Anti-air-leakage structure described in claim 1 or 2, it is characterised in that: described air duct flange is plate flange altogether；Two described flanges (2) in parallel laying and are fixed by described clamping structure therebetween, described card piece installing is the card article (10-1) being installed on two described flange (2) outsides, and the outer end of two described flanges (2) is the dop (2-1) through being bent to form；Described clamping structure is jackscrew clamping structure, described jackscrew clamping structure also includes jackscrew (10-2), one end of described card article (10-1) is fixing end for card dress end and its other end, the described card dress end of described card article (10-1) is the grab through being bent to form, described grab is installed on the dop (2-1) of a described flange (2), described jackscrew (10-2) is arranged on the described fixing end of card article (10-1), the described fixing end of card article (10-1) is fixedly secured to another described flange (2) outside by described jackscrew (10-2).

9. the method that monolithic sheet material airduct tube coupling as claimed in claim 6 is processed, it is characterised in that: the method comprises the following steps:

Step one, sheet metal cut: according to the structure in airduct tube coupling (1) upper inner side U-shaped mouth (11-1) and outside U-shaped mouth (11-2) and size, adopt plate cutting equipment that the both sides up and down of described rectangular metal sheet material are cut respectively, it is thus achieved that two occlusions limit (12-1)；And, structure according to airduct tube coupling (1) upper flange limit (2) and size, adopt described plate cutting equipment that the both sides, front and back of described rectangular metal sheet material are cut respectively, it is thus achieved that flange processing limit (12-2) of two described flanges (2)；Simultaneously, installation position according to upper four ribs of airduct tube coupling (1), process at two described flanges and limit (12-2) is respectively cut four otch (12-3) in parallel laying, it is thus achieved that the sheet material to be processed of airduct tube coupling (1)；

Described sheet material to be processed includes tube coupling body sheet material (12-4), two occlusion limits (12-1) being positioned at described tube coupling body sheet material (12-4) both sides up and down and two flanges processing limit (12-2) laying respectively at both sides before and after described tube coupling body sheet material (12-4)；

Step 2, seaming are processed: in step one two described occlusion limits (12-1) are carried out seaming processing respectively, it is thus achieved that inner side U-shaped mouth (11-1) and outside U-shaped mouth (11-2)；

Step 3, flange processing limit processing: in step one two described flanges are processed limit (12-2) and is processed respectively, and obtain two described flanges (2)；

Step 4, tube coupling body sheet material bend: process four described otch (12-3) on limit (12-2) along flange described in step one, tube coupling body sheet material (12-4) is carried out four bendings, it is thus achieved that the tube coupling body of airduct tube coupling (1)；

Step 5, seaming joint close compacting: by inner side U-shaped mouth (11-1) and outside U-shaped mouth (11-2) snapping described in step 2, and adopt compacting machine that inner side U-shaped mouth (11-1) and outside U-shaped mouth (11-2) are carried out compaction treatment, complete the course of processing of airduct tube coupling (1).

10. in accordance with the method for claim 9, it is characterised in that: compacting machine described in step 5 is cantilevered list flat mouth seaming closure seam compacting machine；

nullDescribed cantilevered list flat mouth seaming closure seam compacting machine includes frame (14-24)、It is arranged on the entablature (14-3) in frame (14-24)、It is positioned at the sill (14-22) immediately below entablature (14-3) and can carry out, along entablature (14-3), the head (14-10) that moves forward and backward，Described head (14-10) includes support (14-26)、It is positioned at support (14-26) lower section and single flat mouth seaming (14-11) is carried out the compacting running roller (14-12) of downward compacting and is arranged on the vertically movable mechanism that support (14-26) is upper and drives compacting running roller (14-12) to move up and down，Described compacting running roller (14-12) is arranged on described vertically movable actuator base，Described compacting running roller (14-12) is positioned at sill (14-22) top，Described compacting running roller (14-12) with sill (14-22) in parallel laying，Described support (14-26) is provided with the movable driving mechanism that motivation head (14-10) carries out moving forward and backward；Described sill (22) is provided with lower mold (14-14), described lower mold (14-14) with sill (14-22) in parallel laying, the top of described lower mold (14-14) has the lower indent (14-25) placed for single flat mouth seaming (11), described lower indent (14-25) is laid along the length direction of sill (14-22), and lower indent (14-25) is positioned at the underface of compacting running roller (14-12)；Described compacting running roller (14-12) is the cylindric running roller laid in level, peripherally disposed on the lateral wall of described cylindric roller have belling platform (14-27) under annular, and under described annular, belling platform (14-27) is positioned at the surface of lower indent (14-25)；The left and right sides of described sill (14-22) is respectively arranged with the many airduct pressure pins (14-18) that airduct tube coupling (1) carries out horizontal support, and described airduct pressure pin (14-18) is laid in level；Multiple described airduct pressure pins (14-18) are all laid in same level, and the upper surface of multiple described airduct pressure pin (14-18) all with the upper surface flush of lower mold (14-14).