CN101634376A - Compound air duct and method thereof - Google Patents
Compound air duct and method thereof Download PDFInfo
- Publication number
- CN101634376A CN101634376A CN200910060384A CN200910060384A CN101634376A CN 101634376 A CN101634376 A CN 101634376A CN 200910060384 A CN200910060384 A CN 200910060384A CN 200910060384 A CN200910060384 A CN 200910060384A CN 101634376 A CN101634376 A CN 101634376A
- Authority
- CN
- China
- Prior art keywords
- airduct
- air duct
- tubing
- hard
- composite air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0263—Insulation for air ducts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0281—Multilayer duct
Abstract
The invention relates to a compound air duct and method thereof, wherein the shell of the compound air duct is composed of an outer surface layer 1, an insulating layer 2, an inner wall surface layer 3, a hard tube 4, a seaming strip 5 and the like, the outer surface layer 1 can be made by a colour steel plate, and the hard tube 4 is arranged between the outer surface layer 1 and the inner wall surface layer 3. The compound air duct has the advantages of light weight, corrosion resistance, long service life, good tightness and being energy saving and environmental friendly and being arranged outside, and especially has the advantages of low manufacturing cost, high strength, beautiful appearance, convenient field construction and the like, and can be applicable to major, medium and minor central air-conditioning engineering, air ventilation and exhaust and smoke ejection prevention engineering.
Description
Technical field
The present invention relates to making, the installation method of a kind of composite air duct and method thereof, particularly composite air duct.
Background technique
Described airduct is the gas communication pipeline that is used for air conditioning, open air exhaust smoke control system.That traditional galvanized sheet airduct exists is perishable, need the secondary heat preservation construction, thermal insulation layer is fragile, thermal insulation property is poor, profile is not attractive in appearance, the life-span is low, the shortcoming of on-the-spot processing difficulties etc.; Aluminium foil+thermal insulation layer composite air duct exists low, the easy delamination of intensity, problem such as fragile; Glass magnesium plate+thermal insulation layer composite air duct exists heaviness, dry linting dirt, shortcoming such as humidity not, and above-mentioned various airduct airtight performances are all undesirable, and all can not be installed on outdoor or to be installed in when outdoor effect undesirable.
Beneficial effect
That the present invention has is in light weight, corrosion-resistant, life-span length, good airproof performance, energy-conserving and environment-protective, can be installed in advantages such as outdoor, particularly cost is low, intensity is high, beautiful shape, the scene is easy for installation, construction cost is low, is applicable to large, medium and small various central air conditioning project, open air exhaust and anti-smoke evacuation engineering.
Summary of the invention
The present invention includes composite air duct housing and flange, it is characterized in that: described airduct housing is made up of external layer, thermal insulation layer, inwall top layer, hard tubing, dowel bar etc., and wherein hard tubing is distributed between the external layer and inwall top layer of composite air duct.
Hard tubing can be implanted when the processing and fabricating air duct board or when the processing and fabricating airduct, and its objective is: (1) can increase the mechanical strength of airduct housing, thereby can reduce the requirement to airduct external layer metal thickness, reduces the airduct cost of material; (2) add bending external layer easily in man-hour, can composite board be processed into airduct at the scene more conveniently; When (3) airduct is installed in the job site,, can reach the purpose that connects two airducts by connecting two tubing ends in the adjacent airduct; (4) the airduct processing speed is fast, and on-the-spot easy for installation, construction cost is low; (5) airduct beautiful shape, leakproofness good, be not easy distortion; (6) strengthen the adhesion on airduct inwall top layer, made it difficult drop-off.
Described hard tubing comprises metal hard tubing such as common steel tube, Stainless Steel Tube, Al-alloy pipe, also can adopt rigid plastics tubing, and such as pvc pipe, plastic-steel etc., its body cross-section is shaped as circle, rectangle etc.Can use finished product tubing in the practical application, also sheet metal can be processed into voluntarily tubular material and use as hard tubing.Hard tubing of the present invention is used to strengthen the mechanical strength of airduct external layer, is used for fixing the compressing tablet on inwall top layer on the hard tubing in addition.
The airduct external layer adopts has certain material of determining to reach toughness, comprises materials such as color steel, galvanized steel plain sheet, aluminium sheet, corrosion resistant plate, and preferred color steel is made.When using color steel, its thickness can be between 0.16mm-1.3mm.Because color steel thickness is big more, the airduct cost is high more, and the on-the-spot difficulty of processing of airduct is also big more, so when the Extreme breadth of airduct cross section greatly the time, can use color steel press device that color steel is suppressed convex-concave shape striped, to satisfy the necessary mechanical strength of big cross section airduct.Color steel thickness commonly used comprises: 0.16mm, 0.18mm, 0.20mm, 0.25mm, 0.326mm, 0.376mm, 0.426mm, 0.5mm, 0.6mm, 0.7mm etc.
When airduct must installment work when outdoor, in the time of can using the better and uncorruptible color steel of water-proof performance, corrosion resistant plate, aluminium sheet as the airduct external layer.Preferred δ 0.426mm color steel, processing technology by strictness makes airduct have higher leakproofness, not only in pipe during static pressure+1500Pa inleakage be 0, and through the long outdoor test of exposing to the sun and rain, the airduct non-corrosive, do not intake, indeformable, thermal insulation property do not descend.
The inwall top layer of described composite air duct adopts metal or nonmetallic material with fire retardant anticorrosion performance to make, and comprises the thin plate or the aluminium foil that adopt metal or nonmetallic material to make, and its thickness can be between 0.015-1mm.Also can increase the glass fiber net compartment between described inwall top layer and the thermal insulation layer, described inwall skin-material can be selected to use the aluminum foil material that contains the glass grid, helps strengthening the mechanical strength on airduct inwall top layer, makes it to have stronger fireproof performance simultaneously.
The mechanical strength design on the inwall top layer of this composite air duct must be less than or equal to the airduct external layer, and its purpose is to make things convenient for airduct processing.For example adopt the inwall top layer of soft fire retardant anticorrosion material, can use light instrument-to process and cut out, the field fabrication airduct is more prone to as art knife.In the practical application, take into account each side factors such as airduct mechanical strength, fire retardant anticorrosion performance, processing complexity and select airduct inwall skin-material.
The thermoinsulation material that thermal insulation layer between airduct inwall top layer and external layer is filled comprises polyurethane foamed material, polystyrene foamed material, phenolic foam material, extrusion molding foam material, glass thermoinsulation material etc., and wherein the foam type thermal insulation layer comprises that foam-in-place and prefabricated back paste two kinds.Described thermal insulation layer can be selected different thermal insulating materials as required, is designed to different thickness, density, to reach the fire-protection rating of regulation, satisfies the requirement of various working environment.
External layer as herein described is meant the skin-material that the composite air duct outermost contacts with air; The inwall top layer is meant the skin-material that flowing gas direct and in the airduct contacts; Thermal insulation layer is meant the thermoinsulation material that is close between external layer and the inwall top layer; Described hard tubing is meant and is distributed in the hard tubular material that is used to increase the airduct mechanical strength in the composite air duct; Described dowel bar is meant and is used to connect the also strip material in sealing air pipe external layer slit, comprises right angle type, arc, " jin " font, riglet type etc.Described flange is meant the connection fittings that are used to connect two airducts.
Description of drawings
Accompanying drawing 1 is the structural representation of composite air duct cross section among the present invention;
Accompanying drawing 2 is cross section view of the hard tubing 4 of partial shape among the present invention;
Accompanying drawing 3 is the structural representations that preset the composite board of hard tubing 4 in a kind of;
Accompanying drawing 4 is structural representations of rectangular air duct among the present invention;
Accompanying drawing 5 is structural representations of circular duct among the present invention;
Accompanying drawing 6 is the tubing connection diagram in the composite air duct;
Accompanying drawing 7 is flange connection diagrams between two airducts of the present invention;
Accompanying drawing 8 is for using the structural representation of " jin " font dowel bar processing composite air duct.
The non-standard figure of above-mentioned accompanying drawing, shown in each figure be the part example, be not to limit size of the present invention, specification, shape fully.
Embodiment
As shown in Figure 1, be the structural representation of composite air duct cross section.Wherein 1 be airduct external layer, 2 for thermal insulation layer, 3 for airduct inwall top layer, 4 for hard tubing, 5 for dowel bar.
The composite air duct making step comprises: calculate the position of needs knuckle, embedding in advance tubing 4 between external layer 1 and inwall top layer 3 according to the airduct size; Prefabricated thermal insulating material is bonded between external layer 1 and the inwall top layer 3, becomes the thermal insulation layer 2 of composite air duct; Suppress bondingly, make the airduct composite board that contains hard tubing (4); Airduct adds and man-hour composite board is bent into 90 degree around tubing 4 to the direction on inwall top layer 3; Connect at the corresponding dowel bar 5 of the seam crossing of composite board, finally make composite air duct.
This paper divides airduct to make and installation two-part are specifically described:
One, airduct is made:
When making composite air duct board, preset hard tubing 4 and do not preset 4 two kinds of methods of hard tubing, the diameter of hard tubing 4 or width are generally less than or equal the thickness of thermal insulating material.
As shown in Figure 3, be a case study on implementation that presets hard tubing 4.Use δ 0.426 color steel as the airduct external layer, contain the material of fiberglass aluminum foil as the inwall top layer 3 of airduct with δ 0.18mm, the polystyrene foam warming plate of selecting thickness 20mm for use is through cutting as thermal insulation layer 2, and hard tubing 4 adopts Al-alloy pipes, its thickness is 2mm, and diameter is 20mm.
As shown in Figure 3, according to preliminary dimension Al-alloy pipe is compressed between color steel 1 and the inwall top layer 2 with the polystyrene foam warming plate is bonding, the airduct composite sheet length and width, the thick 3000mm of being respectively, 1200mm, the 20mm that make, can be used for making a cross section as shown in Figure 4 is 400mm * 200mm, and length is the four limit rectangular air ducts of 3000mm.
During the processing airduct, Manufactured airduct composite sheet is bent into 90 degree around the direction of hard tubing 4 to inwall top layer 3, makes the compressing tablet on the hard tubing 4 just in time push down inwall top layer 3.Seam crossing at airduct during joint close brushes sealing glue, with the fixing dowel bar 5 of screw or rivet 6, dowel bar 5 is close on the airduct color steel 1, to guarantee the mechanical strength and the leakproofness of airduct simultaneously.
At one not in the airduct processing instance of embedding in advance hard tubing, preferred thickness is the material of color steel 3000mm * 1200mm of 0.426mm as the external layer 1 of airduct, adopting thickness simultaneously is that 0.18mm contains the material of the aluminium foil 3000mm * 1200mm of glass grid as the inwall top layer 3 of airduct, the polyurethane foam insulation plate 3000mm * 1200mm that selects thickness 20mm for use is as thermal insulation layer 2, the airduct insulating composite board length of producing is 3 meters, width is 1.2 meters, and thickness is 20mm.During on-the-spot processing airduct, by cutting, implant operations such as hard tubing 4, bonding, bending, riveted joint, can be processed into the composite air duct of plurality of specifications.
For the airduct composite board of not burying hard tubing 4 in advance underground, when the processing and fabricating airduct, because of hard tubing 4 need occupy certain position, need and to place the position of a tubing of thermal insulation layer 2 excisions at hard tubing place, brush sealing glue, hard tubing 4 is implanted, then with the composite board bending and molding.In some cases, because factors such as size or shape, in the time of can not using a composite board to make an airduct, can two, three or four composite boards be spliced through cutting, composite board joint operated by rotary motion on the corner on the corner is placed with equally and is beneficial to the hard tubing 4 of strengthening the airduct mechanical strength, the airduct seam crossing brushes sealing glue, with screw or dowel bar 5 of riveted fixing, be used for guaranteeing the leakproofness of airduct simultaneously simultaneously with the seam crossing structure together.Can also use the adhesive sticker Stamping Steel Ribbon with the seam paste List, to strengthen the leakproofness of airduct.
As shown in Figure 2, described tubing 4 comprises also can adopt rigid plastics tubing by metal pipes such as using steel pipe, Stainless Steel Tube, Al-alloy pipe, such as the pvc pipe etc., can use finished product tubing, also can adopt sheet metal to be processed into tubulose voluntarily.The described tubing 4 general circular pipes that use also can be the tubular materials of rectangle or other shape, as long as it has enough hardness, enable to reach the purpose of the mechanical strength that strengthens described composite air duct.
As shown in Figure 2, the tubing of the B that lists among the use figure, C, three kinds of shapes of D can make the airduct inwall top layer 3 that processes be difficult for aliquation and come off.Described B, C, D tubing are to go up by methods such as welding or riveted joint increase compressing tablet to form on the basis of common tubing A (or rectangle tubing).During practical application, can select to carry tubing 4 finished products of compressing tablet, can not make by oneself when having finished product.Described compressing tablet can be arc, plate shaped etc., adopts metal or plastics to make, and the length of compressing tablet is less than or equal to tubing 4, and the width of compressing tablet is between 10mm-100mm, and thickness is between 0.16mm-3mm.Described compressing tablet can also use metal or plastics to make the Ω shape, is stuck in during use on the tubing 4 to get final product.Composite air duct is after machining, and as shown in Figure 1, compressing tablet is fixed airduct inwall top layer 3 tightly, even inwall top layer 3 also can not come off falling under the situation of glue.
As shown in Figure 5, when making circular duct, between airduct external layer 1 and inwall top layer 3, place tubing 4 equably, increase the mechanical strength of airduct.
Shown in accompanying drawing 6, accompanying drawing 7, when the Extreme breadth of airduct cross section is big, color steel can be suppressed the convex-concave shape, to improve the mechanical strength of composite air duct.
Accompanying drawing 8 is airduct cases, during the processing and fabricating airduct, can adopt " jin " font dowel bar 5 to connect at the Corner butt joint place.In " jin " font dowel bar 5 grooves, brush sealing glue, dock in the airduct composite board insertion groove with the needs butt joint, fix by screw or rivet simultaneously.The mounting pipe material 4 not in the place of using " jin " font dowel bar 5.All joints or seam crossing all will use sealing glue adhering and sealing, meet the requirements with the tightness that guarantees airduct.
When the irregular composite air duct of making except that circle, rectangle,, can adopt the several different methods processing and fabricating according to actual conditions.The finished product plastic strip is made or used to described dowel bar 5 general employings with external layer 1 identical materials, its length and airduct equal in length, and width is between 30mm-100mm.Use 5 pairs of right angles of dowel bar, arc or irregular seam crossing to dock fixing.When seam crossing was the right angle, dowel bar 5 was prefabricated into right angle or " jin " font (as shown in Figure 8), when seam crossing was arc, dowel bar 5 was prefabricated into arc (as shown in Figure 5), and seam crossing is the plane, and dowel bar 5 is a riglet.Dowel bar 5 can be that the inside and outside two-layer air duct board of clamping connects, and performance is better.
Two, airduct is installed:
When airduct is installed, hard tubing 4 in two airducts can be connected and fixed the purpose that reaches two airduct butt joints, as shown in Figure 6, the method for pegging graft for gluing is connected and fixed hard tubing 4, can adopt methods such as wire connection, riveted joint, snapping to connect two tubing of needs butt joint.Simultaneously can brush sealing glue, rivet a circle dowel bar simultaneously, also stick the adhesive sticker Stamping Steel Ribbon at the seam crossing of airduct, to strengthen the leakproofness of airduct in the joint.
As shown in Figure 7, can also use flange 7 to connect between two airducts, described flange 7 is to adopt materials such as metallic material, pvc material, plastic-steel to make, and its cross section is " worker " font.The inside wall height of flange 7 is identical with airduct composite board thickness, and width is between 30mm-100mm, and length equates with the airduct cross section length of side.When airduct is installed, on flange 7 inner side brush, seal glue earlier, then the airduct composite board is inserted in the flange 7, reinforce by immobilization materials such as rivet, screws 6 at last, two adjacent airducts are connected and fixed, form long airduct." worker " font flange can adopt two "] ", " [" section bar material riveted fixing forms.
In order to increase intensity and the airduct performance that connects between two composite air ducts, flange 7 can be connected and tubing 4 connects the two and carries out simultaneously.
When at the scene airduct being installed, because this composite air duct is in light weight, can adopt the Lightgage Steel Joist hoisting, immovable point can be at the joint and the airduct middle part of airduct.Perhaps suspension ring are fixed on the hard tubing 4, hang muscle and be fixed on the suspension ring.The bigger composite air duct of cross section is being installed, and because of its outer surface material is thicker, integral body is heavier, should use traditional angle iron bracket hoisting to install and fix composite air duct.
Claims (10)
1, a kind of composite air duct and method thereof, comprise airduct housing and flange, it is characterized in that, described airduct housing is made up of external layer (1), thermal insulation layer (2), inwall top layer (3), hard tubing (4), dowel bar (5), when the processing and fabricating air duct board or when the processing and fabricating airduct, implant hard tubing (4), hard tubing (4) is distributed between the external layer (1) and inwall top layer (3) of composite air duct.
2, composite air duct according to claim 1, wherein hard tubing (4) comprises finished product tubing and homemade tubing, it is characterized in that, hard tubing (4) and airduct equal in length, connect and fix the end of hard tubing (4) of the joint area of two composite air ducts, two airducts are connected and fixed, constitute long composite air duct.
3, according to the hard tubing (4) in the described composite air duct of claim 1, comprise the tubulose hard material that uses metallic material, nonmetallic material to make, it is characterized in that on the described hard tubing (4) compressing tablet being arranged, be used for fixing airduct inwall top layer (2).
4, composite air duct according to claim 1 is characterized in that, the material of the external layer of airduct (1) is a color steel, and its thickness is between 0.16mm-1.3mm, and mechanical strength is more than or equal to the mechanical strength of inwall top layer (3).
5, color steel according to claim 4 is characterized in that, described color steel thickness comprises: 0.16mm, 0.18mm, 0.25mm, 0.326mm, 0.376mm, 0.426mm, 0.5mm, 0.6mm, 0.7mm.
According to claim 4 or 5 described color steels, it is characterized in that 6, described color steel uses the color steel that is pressed into convex-concave shape striped.
7, a kind of color steel composite air duct board that presets hard tubing, be used to make the described composite air duct of claim 1, it is characterized in that, preset hard tubing (4) in the described composite air duct board, described hard tubing (4) comprises the tubulose hard material that uses metallic material, nonmetallic material to make.
8, a kind of making method of composite air duct is characterized in that, comprises the steps: to calculate according to the airduct cross-sectional dimension position of needs knuckle, embedding in advance hard tubing (4) between external layer (1) and inwall top layer (3); Prefabricated thermal insulating material is bonded between external layer (1) and inwall top layer (3), becomes the thermal insulation layer (2) of composite air duct; Suppress bondingly, make the composite air duct board that contains hard tubing (4); Airduct adds and man-hour composite board is bent into 90 ° around the direction of hard tubing (4) to inwall top layer (3); Adopt dowel bar (5) to connect at the air duct board seam crossing, finally make composite air duct.
9, a kind of making method of composite air duct is characterized in that, comprises the steps: to use the airduct composite board that does not preset hard tubing (4); Calculate the position of needs knuckle according to the airduct cross-sectional dimension, cutting airduct inwall top layer (3) and thermal insulation layer (2); Brush coating is also implanted hard hard tubing (4) in the sheet material; Airduct adds and man-hour composite board is bent into 90 ° around the direction of hard hard tubing (4) to inwall top layer (3); Adopt dowel bar (5) to connect at the air duct board seam crossing, finally make composite air duct.
10, a kind of installation method of composite air duct is characterized in that, comprises the steps: to make two airducts butt joints by the hard tubing (4) in two airducts of methods such as bonding, wire connection, riveted joint, grafting, snapping connection; Brush sealing glue in the joint, rivet a circle dowel bar simultaneously; Also use " worker " font flange (7) to connect between two airducts simultaneously; During the airduct lifting, adopt the Lightgage Steel Joist hoisting, immovable point can perhaps be fixed on the hard tubing (4) with suspension ring at the joint and the airduct middle part of airduct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910060384A CN101634376A (en) | 2009-08-19 | 2009-08-19 | Compound air duct and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910060384A CN101634376A (en) | 2009-08-19 | 2009-08-19 | Compound air duct and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101634376A true CN101634376A (en) | 2010-01-27 |
Family
ID=41593660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910060384A Pending CN101634376A (en) | 2009-08-19 | 2009-08-19 | Compound air duct and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101634376A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953799A (en) * | 2014-04-16 | 2014-07-30 | 德州中威空调设备有限公司 | Flange plug-in assembly system shaped like a Chinese character 'jin' of composite air duct |
| CN105371654A (en) * | 2015-11-10 | 2016-03-02 | 安徽永茂泰汽车零部件有限公司 | Melting furnace |
| CN106931613A (en) * | 2017-04-10 | 2017-07-07 | 杭州澳利斯橡塑保温材料有限公司 | Inside holding airduct and its processing method |
| CN110566726A (en) * | 2019-09-29 | 2019-12-13 | 中国铁路设计集团有限公司 | Fire prevention integrative compound tuber pipe that keeps warm |
| CN111411649A (en) * | 2019-01-07 | 2020-07-14 | 上海申通地铁集团有限公司 | Device and method for researching evolution characteristics of soil body of side wall of underground building |
| CN111550012A (en) * | 2020-04-29 | 2020-08-18 | 广州市房屋开发建设有限公司 | Method for installing ventilation pipe |
-
2009
- 2009-08-19 CN CN200910060384A patent/CN101634376A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953799A (en) * | 2014-04-16 | 2014-07-30 | 德州中威空调设备有限公司 | Flange plug-in assembly system shaped like a Chinese character 'jin' of composite air duct |
| CN105371654A (en) * | 2015-11-10 | 2016-03-02 | 安徽永茂泰汽车零部件有限公司 | Melting furnace |
| CN106931613A (en) * | 2017-04-10 | 2017-07-07 | 杭州澳利斯橡塑保温材料有限公司 | Inside holding airduct and its processing method |
| CN111411649A (en) * | 2019-01-07 | 2020-07-14 | 上海申通地铁集团有限公司 | Device and method for researching evolution characteristics of soil body of side wall of underground building |
| CN110566726A (en) * | 2019-09-29 | 2019-12-13 | 中国铁路设计集团有限公司 | Fire prevention integrative compound tuber pipe that keeps warm |
| CN111550012A (en) * | 2020-04-29 | 2020-08-18 | 广州市房屋开发建设有限公司 | Method for installing ventilation pipe |
| CN111550012B (en) * | 2020-04-29 | 2022-02-15 | 广州市房屋开发建设有限公司 | Method for installing ventilation pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11802650B2 (en) | Methods and materials to universally fit duct liner insulation for oval HVAC duct systems | |
| CN101634376A (en) | Compound air duct and method thereof | |
| JP6622155B2 (en) | Insulation duct products | |
| KR20130122769A (en) | Fluid handling assembly having a multilayered composite pipe employing a mechanical coupling and method of assembling the fluid handling assembly | |
| WO2007148972A1 (en) | Building accessible to persons | |
| CN101329008B (en) | Steel surface type composite air duct and manufacturing method thereof | |
| US20180356117A1 (en) | HVAC Duct System, Method and Machine | |
| CN201145380Y (en) | Novel composite ventilating pipeline | |
| CN201517664U (en) | Colored steel composite air pipe | |
| CN200958659Y (en) | Thermal-insulating pipeline | |
| CN2821458Y (en) | Double color steel plate heat insulation air pipe | |
| CN212509852U (en) | Special composite air pipe for subway | |
| CN202608784U (en) | Air-conditioning ventilating air duct structure of railway vehicle | |
| CN111734894A (en) | Composite air pipe for hydropower station and processing technology thereof | |
| CN205326751U (en) | Passenger train air conditioning unit's ventilation duct | |
| JP2009139042A (en) | Lightweight noncombustible duct | |
| JP2007231529A (en) | Externally-applied thermal insulation exterior material | |
| CN1752503A (en) | Hollow blast pipe | |
| CN209813301U (en) | Effectual tectorial membrane plastic-aluminum composite panel gives sound insulation | |
| CN218000710U (en) | Air pipe with improved compression resistance | |
| CN212361141U (en) | Phenolic foam ventilating duct | |
| CN217537672U (en) | Assembled light steel keel partition wall | |
| CN217420323U (en) | Self-locking structure metal external decorative plate, heat preservation and decoration integrated plate and heat preservation wall | |
| CN213897775U (en) | Square tube aluminum plate | |
| CN212509851U (en) | Composite air pipe for hydropower station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100127 |