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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 flange connection, pipe/pipe joint/pipe fitting, pipe protection, etc., can solve the problem of high production cost, loose air leakage at the air duct connection, and external thermal insulation effect at the air duct connection. It can reduce the cost of construction and installation, reduce the air leakage of the system, and improve the effect of external thermal insulation.

Active Publication Date: 2012-11-21
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 Example 1: When connecting a thin steel plate conjoined flange rectangular air duct with a medium and high pressure system (>500Pa) whose side lengths are all >1000 mm, the long and short sides of the rectangular air duct 1 correspond to the conjoined flanges 3 sides side according to image 3 The structure is assembled, that is, a long strip of galvanized flat steel 5 is embedded around the outer side of a conjoined flange 3, and the self-tapping screws 9 are fastened to connect the long strip of galvanized flat steel 5 and the side of a conjoined flange 3. side, rubber closed-cell sponge pad 2, and the other side of the conjoined flange 3.

specific Embodiment 2

[0027] Specific embodiment 2: When a thin steel plate conjoined flange rectangular air duct with a medium and high pressure system (>500Pa) and a long side >1000mm or a low pressure system (≤500Pa) and a long side>1500mm is connected, the long side of the rectangular air duct 1 is connected. Corresponding conjoined flange 3 side according to image 3 The structure is assembled, and the side of the conjoined flange 3 corresponding to the short side of the rectangular duct 1 is as follows: 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 the self-tapping screws 9 are fastened to connect the long strip of galvanized flat steel 5. , the side of the long side of one conjoined flange 3, the rubber closed-cell sponge pad 2, the side of the long side of the other conjoined flange 3; the self-tapping screw 9 is fastened to conne...

specific Embodiment 3

[0028] Specific embodiment 3: When the low-voltage system (≤500Pa) and the long side of the rectangular air duct is less than or equal to 1500mm, the long side of the rectangular air duct 1 is connected to the one-piece flange of the thin steel plate with one-piece flanges. side according to Figure 4 The structure is assembled, that is, the self-tapping screw 9 is fastened to connect the side of one conjoined flange 3 , the rubber closed-cell sponge pad 2 , and the side of the other conjoined flange 3 .

[0029] Correspondingly arranged two conjoined flanges 3 are provided with round holes at the corresponding positions. 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 long galvanized flat steel 5 are processed according to the size of the conjoined flange 3 .

[0030] For the connection structure of galvanized bolt 4, long galvanized flat steel 5, conjoined flange...

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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 connection structure of a thin steel plate conjoined flange rectangular air duct. Background technique [0002] The existing rectangular air duct connection structures made of thin steel plates mainly include angle steel flange bolt connection, thin steel plate conjoined flange spring clip or top wire clip connection, S-shaped insert connection, and C-shaped insert connection. Combined angle insert connection; the above connection form has the following disadvantages: the angle steel flange processing process is complicated, the amount of materials is large, the production cost is high, and the efficiency is low, 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 internal flatness and cleanliness of the air duct are poor; [...

Claims

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Application Information

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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