CN-122014933-A - Air pipe flange connection structure

Abstract

The invention discloses an air pipe flange connection structure, and belongs to the technical field of air pipe connection. The invention comprises a first flange and a second flange which are respectively fixed at the end parts of two sections of air pipes, and also comprises at least one locking insert strip and a plurality of fixing pins. The fixed pin is fixed on at least one flange edge of the first flange, and a through hole corresponding to the position of the fixed pin is formed in the corresponding flange edge of the second flange. The inside of the fixed pin is provided with a penetrating deep through hole along the length direction of the flange edge. A plurality of locking inserting pieces are arranged on the locking inserting piece strip at intervals, and the locking inserting pieces can be inserted into and penetrate through deep through holes of the fixing pins in a one-to-one correspondence mode. The locking insert strip is provided with a driving part for driving the locking insert strip to move along the length direction of the flange edge, the locking insert strip is matched with the deep through hole in the moving process, and a tensioning force along the thickness direction of the flange is applied to the fixing pin, so that the two flanges are locked. The invention has the advantages of simple operation, reliable locking, uniform stress and the like.

Inventors

• QIAO JIANJUN

Assignees

• 乔建军

Dates

Publication Date

20260512

Application Date

20260401

Claims (8)

1. 1. The utility model provides an tuber pipe flange connection structure, includes first flange and the second flange of fixing respectively at two sections tuber pipe body tip of waiting to connect, its characterized in that still includes: The locking insert strip is provided with a plurality of locking inserts at intervals along the length direction; A plurality of fixing pins fixed on at least one flange edge of the first flange; A plurality of through holes which correspond to the fixing pins in position and are used for the fixing pins to pass through are formed on the corresponding flange edge of the second flange; A through deep through hole is formed in the fixing pin along the length direction of the flange edge; The locking inserting sheets on the locking inserting sheet strip can be correspondingly inserted into and penetrate through the deep through holes of the fixing pins one by one; the locking insert strip is further provided with a driving part, and the driving part is used for driving the locking insert strip to move along the length direction of the flange edge under the action of external force, so that the locking insert strip is matched with the deep through hole in the moving process, and simultaneously, tension force along the thickness direction of the flange is applied to the fixing pin, so that the first flange and the second flange are locked.
2. 2. The duct flange connection according to claim 1, wherein the locking tab has a sloping side and a straight side, the deep through hole has an inner shape of an arc or a slope structure with a high end and a low end, and the sloping side cooperates with the low end of the deep through hole to lift the fixing pin when the locking tab moves in the deep through hole, and the straight side is used for pressing the second flange.
3. 3. The duct flange connection structure of claim 2 wherein said securing pin includes a raised base for fixedly connecting with said first flange and a main body for passing through a through hole in said second flange, said deep through hole being defined within said main body.
4. 4. A duct flange connection according to claim 3, wherein the main body of the fixing pin has a cross-section in a non-closed shape with one side cut at the position where the deep through hole is formed.
5. 5. The air duct flange connection structure according to claim 1, wherein the driving portion comprises a screw, a fixing block and a locking nut, the screw is fixedly connected to one end of the locking insert strip, the fixing block is fixedly arranged on the second flange, the screw penetrates through the fixing block, and the locking nut is in threaded connection with one end of the screw penetrating out of the fixing block and used for driving the locking insert strip to move.
6. 6. The air duct flange connection structure according to claim 1, wherein the width of the straight edge of the locking tab strip for providing the driving part is increased and is bent into an L-shaped or U-shaped cross section.
7. 7. The air duct flange connection structure according to claim 1, wherein the deep through hole of the fixing pin is provided with a flare at one end into which the locking tab is inserted.
8. 8. The air duct flange connection structure according to claim 1, wherein the air duct is a square air duct, the first flange and the second flange are respectively provided with four flange edges, one or two flange edges are connected by adopting the locking insert strip and the fixing pin, and the other flange edges are connected by adopting bolts.

Description

Air pipe flange connection structure Technical Field The invention relates to the technical field of air pipe connection, in particular to an air pipe flange connection structure. Background The air pipe is a pipeline for conveying air in industrial buildings or civil buildings and high-rise buildings, the connection mode of the air pipe is non-flange connection in welding, flange connection, cutting or other modes, the tightness and the firmness of the flange connection are obviously superior to those of the non-flange connection in the cutting or other modes, the construction speed is superior to that of the welding, and the construction difficulty and the cost are lower than those of the welding, so that the flange connection is the most widely applied air pipe connection mode. The air pipe flange is made of angle steel or other section steel, the angle steel flange is fixed by multiple bolts, and other flanges such as a common plate flange are fixed by bolts and clamping strips, so that the firmness and tightness of air pipe connection are ensured. In the flange connection air pipe classification, although the angle steel flange is fixed by adopting a plurality of bolts, the tightness and the firmness of the air pipe connection meet the connection requirements of high-middle-low pressure air pipes, but in the practical application process, obvious or potential problems still exist: In some buildings, the air pipes are designed and installed in installation places such as wall or roof plates, and the like, with one or more flanges attached to a fixed surface, the manual screw-down method often has the problem that the arms and tools of operators are difficult or cannot reach the positions of the screws, so that the situation that a plurality of bolts or a plurality of bolts are not screwed down in place or are abandoned on the flange edges, the tightness, the integrity and the safety of the air pipes after the air pipes are installed are seriously affected, and the situation that the unilateral or multilateral installation conditions are limited is often common in the air pipes in the newly-built high-rise building. In another case, the hoisted air pipe is provided with a plurality of bolts or a plurality of bolts which are not screwed in place or are abandoned on the top edge or the flange edge which cannot be seen by personnel. Under the above circumstances, due to the fact that the flange of the conventional flange connection air duct is partially in a missing or not screwed down state due to limited installation conditions or due to carelessness of an installer, artificial intention and other reasons, the air duct installation quality defect that the flange connection is not tight or firm is caused, and a reliable air duct flange connection structure is needed to be found to solve the problems. Disclosure of Invention The invention aims at solving the problems in the background art, and provides an air pipe flange connection structure which is used for solving the problems of inaccurate or unreliable air pipe installation quality defect caused by partial screw bolt missing or no screw tightening of a flange of a conventional flange connection air pipe in the air pipe installation process. The invention provides a wind pipe flange connection structure, which comprises a first flange and a second flange which are respectively fixed at the end parts of two sections of wind pipe bodies to be connected, and further comprises: The locking insert strip is provided with a plurality of locking inserts at intervals along the length direction; A plurality of fixing pins fixed on at least one flange edge of the first flange; A plurality of through holes which correspond to the fixing pins in position and are used for the fixing pins to pass through are formed on the corresponding flange edge of the second flange; A through deep through hole is formed in the fixing pin along the length direction of the flange edge; The locking inserting sheets on the locking inserting sheet strip can be correspondingly inserted into and penetrate through the deep through holes of the fixing pins one by one; each locking insert and the corresponding fixing pin form a connecting point. The locking insert strip is further provided with a driving part, and the driving part is used for driving the locking insert strip to move along the length direction of the flange edge under the action of external force, so that the locking insert strip is matched with the deep through hole in the moving process, and simultaneously, tension force along the thickness direction of the flange is applied to the fixing pin, so that the first flange and the second flange are locked. As the preferable technical scheme, the inside shape of the deep through hole is of an arc or inclined plane structure with one high end and one low end, when the locking inserting piece moves in the deep through hole, the inclined edge is matched with the low end of the deep