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Connecting structure for sheet steel coupling flange rectangular air ducts

A technology of conjoined flange and connection structure, which is applied in the direction of flange connection, pipe/pipe joint/pipe fitting, pipe protection, etc., can solve the problem of high production cost, poor external insulation effect of air duct connection, and loose air duct connection. Air leakage and other problems, to achieve the effect of reducing the cost of construction and installation, improving the effect of external insulation, and reducing the amount of air leakage in the system

Active Publication Date: 2014-06-11
CHINA ELECTRONICS SYST ENG NO 2 CONSTR +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing connection structures of rectangular air ducts made of thin steel plates mainly include angle steel flange bolt connections, thin steel plate conjoined flange spring clips or top wire clip connections, S-shaped insert connections, and C-shaped insert connections. Combined angle-shaped insert connection; the above-mentioned connection form has the following disadvantages: the angle steel flange has complicated processing procedures, large amount of materials, high production cost, and low efficiency. The air duct and the angle steel flange need to be connected by rivets and the rivets need to be sealed with sealant , so the flatness and cleanliness inside the air duct are poor;
[0003] Although the thin steel plate conjoined flange air duct has the advantages of smooth inner surface and good cleanliness, the cost of spring clips or jacking wire clips for air duct connection is high, especially for medium and high pressure systems and large-size common-plate flange air ducts. After the connection, the strength is low and the tightness is poor. The vibration during operation will cause the air duct connection to loosen and leak air. In addition, the structure of the top wire card causes the external insulation effect of the air duct connection to be poor; S-shaped plug-in connection and C-shaped plug-in connection , the connection form of the vertical joint angle inserts is only suitable for the air duct of the low-pressure system, and has strict requirements on the long side size of the air duct, which has great limitations

Method used

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  • Connecting structure for sheet steel coupling flange rectangular air ducts
  • Connecting structure for sheet steel coupling flange rectangular air ducts
  • Connecting structure for sheet steel coupling flange rectangular air ducts

Examples

Experimental program
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Effect test

specific Embodiment 1

[0026] Specific embodiment 1: when the thin steel plate conjoined flange rectangular air duct with the length of each side of the medium and high pressure system (>500Pa) is greater than 1000mm is connected, the long and short sides of the rectangular air duct 1 correspond to the conjoined flange 3 sides side according to image 3 The structure is assembled, that is, a strip-shaped galvanized flat steel 5 is embedded around the outside of a connected flange 3, and self-tapping screws 9 are fastened to connect the long strip-shaped galvanized flat steel 5 and the side of a connected flange 3. Edge, rubber obturator sponge pad 2, the side of another said conjoined flange 3.

specific Embodiment 2

[0027] Specific embodiment 2: When the medium-high pressure system (>500Pa) and the long side>1000mm or the low-pressure system (≤500Pa) and the long side>1500mm are connected to the rectangular air duct of the thin steel plate conjoined flange, the long side of the rectangular air duct 1 The side of the corresponding one-piece flange 3 is in accordance with image 3 The structure is assembled, and the side of the connected flange 3 corresponding to the short side of the rectangular duct 1 is in accordance with Figure 4 The structure is assembled, that is, the outer side of a conjoined flange 3 corresponding to the long side of the rectangular air duct 1 is embedded with a long strip of galvanized flat steel 5, and self-tapping screws 9 are fastened to connect the long strip of galvanized flat steel 5 1, the side of the long side of a conjoined flange 3, the rubber obturator sponge pad 2, the side of the long side of another conjoined flange 3; self-tapping screws 9 are faste...

specific Embodiment 3

[0028] Specific Example 3: In the low-pressure system (≤500Pa) and the long side of the rectangular air duct ≤ 1500mm, the thin steel plate conjoined flange when the rectangular air duct is connected, the conjoined flange corresponding to the long side and short side of the rectangular air duct 1 according to the side Figure 4 The structure is assembled, that is, the self-tapping screw 9 is fastened to connect the side of a one-piece flange 3, the rubber closed-cell sponge pad 2, and the side of the other one-piece flange 3.

[0029] The corresponding positions of the two connected flanges 3 arranged correspondingly are provided with circular holes, and the structure of the elongated galvanized flat steel 5 with long circular holes is shown in Figure 5 , which is punched with oblong holes 7 according to the spacing and aperture required by the specification, and the length, width and thickness of the elongated galvanized flat steel 5 are processed according to the size of th...

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Abstract

The invention provides a connecting structure for sheet steel coupling flange rectangular air ducts. By adopting the connecting structure, the strength of the joint of the air ducts is enhanced, the leakproofness of a whole air duct system is improved, the air leakage rate of the system is reduced, and moreover, the installation cost of construction is reduced. Meanwhile, an external thermal insulation effect at the joint of the air ducts is improved, and the thermal insulation property is improved. The connecting structure comprises the rectangular air ducts, and coupling flanges of the rectangular air ducts are arranged correspondingly one to one. The connecting structure is characterized in that a rubber sealed cell sponge mat is stuffed between the inner sides of the two coupling flanges correspondingly arranged; an elongated metal strip is embedded at the outer side of the long edge of one of the two coupling flanges; the elongated metal strip, the side edge of the long edge of the coupling flange which corresponds to the elongated metal strip, the rubber sealed cell sponge mat and the side edge of the long edge of the other coupling flange are connected in the manner of fastening; and the side edge of the short edge of one coupling flange, the rubber sealed cell sponge mat and the side edge of the short edge of the other coupling flange are connected in the manner of fastening.

Description

technical field [0001] The invention relates to the technical field of ventilation, air-conditioning and smoke prevention and exhaust system engineering, in particular to a connecting structure of rectangular air ducts with integral flanges of thin steel plates. Background technique [0002] The existing connection structures of rectangular air ducts made of thin steel plates mainly include angle steel flange bolt connections, thin steel plate conjoined flange spring clips or top wire clip connections, S-shaped insert connections, and C-shaped insert connections. Combined angle-shaped insert connection; the above-mentioned connection form has the following disadvantages: the angle steel flange has complicated processing procedures, large amount of materials, high production cost, and low efficiency. The air duct and the angle steel flange need to be connected by rivets and the rivets need to be sealed with sealant , so the flatness and cleanliness inside the air duct are po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L23/14F16L23/16F16L59/16
Inventor 吉基军管家钰潘汝奇龙军窦建松张文峰
Owner CHINA ELECTRONICS SYST ENG NO 2 CONSTR