CN215060270U

CN215060270U - Air pipe flange connecting structure

Info

Publication number: CN215060270U
Application number: CN202120804889.4U
Authority: CN
Inventors: 董尔凯; 奉利
Original assignee: Chongqing Dongqing Ventilation Equipment Co ltd
Current assignee: Chongqing Dongqing Ventilation Equipment Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-12-07
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses an air pipe flange connection structure, which comprises a first rectangular air pipe and a second rectangular air pipe, wherein four sides of the orifice of the first rectangular air pipe are respectively provided with four first flange strips; four sides of the orifice of the second rectangular air duct are respectively provided with four second flange strips; the method is characterized in that: the sealing device also comprises a sealing gasket, a first corner pressing plate, a second corner pressing plate and a peripheral clamp; the sealing washer comprises an outer frame pad, a middle frame pad and an inner frame pad, wherein the middle frame pad is provided with a first convex frame and a second convex frame; a first straight groove is arranged on the pressing surface of the first flange strip; a second straight groove is arranged on the pressing surface of the second flange strip; the first corner pressing plate pressing surface is provided with a first corner groove; the first corner pressing plate pressing surface is provided with a second corner groove; the peripheral clamp has a clamp groove. The utility model discloses can make its first rectangle tuber pipe and second rectangle tuber pipe promote sealing performance and can prevent that the later stage performance from weakening and increase of service life after connecting.

Description

Air pipe flange connecting structure

Technical Field

The utility model relates to an tuber pipe flange joint structure.

Background

Referring to fig. 1, the existing air duct flange connection structure is characterized in that flanges (each flange includes four flange strips) of two air ducts are sealed by a flange sealing gasket (or called sealing ring), four corners of the two air ducts are provided with four diagonal connectors, two sides of each diagonal connector are inserted into two adjacent flange strip clamping grooves, and corner ends of each pair of diagonal connectors are fixed by bolts (or bolt assemblies). And the following shortcomings of the existing air pipe flange connection structure are found when in use:

firstly, the section of the flange sealing gasket is rectangular, the range of a sealing contact surface is small, the problem of poor contact with flanges of two air pipes exists, and the problem of poor sealing effect exists;

secondly, the flange sealing gasket is not positioned between the flanges of the two air pipes, so that the assembly is inconvenient, the consistency of the assembly performance is poor, the quality is difficult to control, and meanwhile, the sealing performance is reduced due to easy deformation and extrusion sliding;

thirdly, because four diagonal connectors are arranged at four corners of the two air pipes and are in splicing fit with the two adjacent flange strips, the anti-loosening performance is low, large external force cannot be borne, the later-stage sealing performance is reduced, and the service life is influenced;

fourthly, because the matching structure of the four corners of the flange sealing gasket and the four corners of the flanges of the two air pipes is not reasonable enough, the sealing performance is worst, and the air leakage is most serious.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect problem or a plurality of defect problems that exist among the prior art, the utility model provides an air pipe flange joint structure.

In order to achieve the purpose, the utility model provides a wind pipe flange connection structure, which comprises a first rectangular wind pipe and a second rectangular wind pipe, wherein four sides of the mouth of the first rectangular wind pipe are respectively provided with four first flange strips; four sides of the orifice of the second rectangular air duct are respectively provided with four second flange strips; the method is characterized in that: the sealing device also comprises a sealing gasket, a first corner pressing plate, a second corner pressing plate and a peripheral clamp; the sealing washer comprises an outer frame pad, a middle frame pad and an inner frame pad, wherein the middle frame pad is provided with a first convex frame and a second convex frame which respectively protrude from two sides along the direction of the central line of the middle frame pad; the first flange strip pressing surface is provided with a first straight groove used for being matched with the frame edge of the first convex frame; the second flange strip pressing surface is provided with a second straight groove used for being matched with the frame edge of the second convex frame; the first corner pressing plate is inserted between any two adjacent first flange strips, and a first corner groove used for being matched with a first convex frame corner is formed in the pressing surface of the first corner pressing plate; the second angle pressing plate is inserted between any two adjacent second flange strips, and a second angle groove used for being matched with the frame angle of the second convex frame is formed in the pressing surface of the second angle pressing plate; the peripheral clamp is provided with a clamping groove, and the first flange strip, the outer frame gasket frame edge and the second flange strip are simultaneously positioned in the clamping groove and fixedly connected with the peripheral clamp through a first bolt; the first corner pressing plate, the outer frame cushion frame corner and the second corner pressing plate are simultaneously positioned in the clamping groove and fixedly connected with the outer periphery clamp through a second bolt.

As a first preferred scheme, the peripheral clamps have four shapes, and the four peripheral clamps are strip-shaped, and the four peripheral clamps enclose a rectangular frame.

As a second preferred scheme, the two peripheral clamps are in an L shape, and the two peripheral clamps enclose a rectangular frame.

Furthermore, the end parts of the peripheral clamps are provided with connecting lugs, and the connecting lugs on the two adjacent peripheral clamps are fixedly connected through a third bolt.

Preferably, the cross section of the first convex frame edge is in a dovetail shape or/and the cross section of the second convex frame edge is in a dovetail shape.

The utility model discloses beneficial effect:

first, the utility model discloses because this seal ring includes the outer frame pad, middle frame pad and inner frame pad, it is protruding first protruding frame and the protruding frame of second respectively to have the both sides along its central line direction in this middle frame pad, it is sealed to form unsmooth (or step) formula three-section between the first flange strip of this seal ring and first rectangle tuber pipe, it is sealed to form unsmooth (or step) formula three-section between the second flange strip of this seal ring and second rectangle tuber pipe simultaneously, consequently, the sealed area of contact between its three has both been improved, contact failure has also been avoided, sealing performance and effect are greatly improved.

Secondly, the four frame edges of the first convex frame of the middle frame cushion are respectively clamped into the first straight grooves of the four first flange strips on the first rectangular air pipe during assembly, and the four frame edges of the second convex frame of the middle frame cushion are respectively clamped into the second straight grooves of the four second flange strips on the second rectangular air pipe, so that the sealing washer is locked and fixed after the two-way four edges are positioned simultaneously, and the displacement of the sealing washer during assembly can be avoided; the assembly is more accurate and simple, the consistency of the assembly performance can be ensured, the assembly quality is easy to control, and meanwhile, when the middle frame cushion is used, the middle frame cushion is positioned in two directions and four sides, is not easy to deform and loosen and can keep stable sealing performance for a long time.

Third, the utility model discloses because this seal ring includes the outer frame pad, middle frame pad and inside casing pad, this seal ring sealing range widens, four frame corners of this seal ring are pressed from both sides tightly by four first corner clamp plates and four second corner clamp plate combinations and symmetry simultaneously, and four first corner clamp plates insert respectively in four first corners on the first rectangle tuber pipe and realize filling sealedly, these four second corner clamp plates insert respectively simultaneously in four second corners on the second rectangle tuber pipe and realize filling sealedly, make to form between seal ring and first rectangle tuber pipe and the second rectangle tuber pipe and enclose sealedly entirely, can solve first rectangle tuber pipe and the short slab problem that the sealing performance of second rectangle tuber pipe is not enough in four corners.

Fourthly, the utility model can peripherally restrain and fix the four first flange strips of the first rectangular air pipe, the four second flange strips of the second rectangular air pipe, the sealing washer, the four first corner pressing plates and the four second corner pressing plates into a whole through the peripheral clamps, thereby not only improving the overall anti-loosening performance, but also bearing larger external force; in addition, the four first flange strips and the four second flange strips, the sealing gaskets, the four first corner pressing plates and the four second corner pressing plates of the second rectangular air pipe are circumferentially surrounded in the peripheral clamp and are fixed by bolts after being clamped, so that loosening of parts in the axial direction and the radial direction can be avoided, long-term sealing stability can be guaranteed, and the service life can be prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a flange connection structure of an existing air duct.

Fig. 2 is a top view of an air duct flange connection structure according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view a-a of fig. 2.

Fig. 4 is an enlarged view of fig. 3 at B.

Fig. 5 is a cross-sectional view of C-C in fig. 2.

Fig. 6 is an enlarged view at D in fig. 5.

Fig. 7 is a perspective view of an air duct flange connection structure in a first embodiment of the present invention.

Fig. 8 is an exploded view of a split air duct flange connection structure according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of the first rectangular duct.

Fig. 10 is a schematic structural view of a second rectangular duct.

Fig. 11 is a schematic view of the structure of the sealing gasket.

Fig. 12 is a cross-sectional view of E-E in fig. 11.

Fig. 13 is a schematic structural view of the first corner pressing plate.

Fig. 14 is a schematic structural view of the second corner pressing plate.

Fig. 15 is a schematic structural view of a middle peripheral clip according to an embodiment of the present invention.

Fig. 16 is a top view of a wind pipe flange connection structure according to a second embodiment of the present invention.

Fig. 17 is a schematic structural view of a peripheral clip according to a second embodiment of the present invention.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

the first embodiment is as follows: referring to fig. 2-15, an air duct flange connection structure includes a first rectangular air duct 1, a second rectangular air duct 9, a sealing gasket 2, four first corner pressing plates 3, four second corner pressing plates 4, and two peripheral clamps 5.

Referring to fig. 11, four first flange strips 1-1 are respectively disposed on four sides of the orifice of the first rectangular air duct 1. The four first flange strips 1-1 are distributed in a rectangular shape and integrated with the first rectangular air pipe 1 (welded or riveted, etc.).

The first corner pressing plate 3 is inserted between any two adjacent first flange strips 1-1. Specifically, a first corner opening 100 is formed between any two adjacent first flange strips 1-1. The first gusset plate 3 matches the shape of the first corner opening 100 (i.e. rectangular), and the first gusset plate 3 is inserted into the first corner opening 100.

Four edges of the orifice of the second rectangular air duct 9 are respectively provided with four second flange strips 9-1; the four second flange strips 9-1 are distributed in a rectangular shape and integrated with the second rectangular air duct 9 (welded or riveted, etc.).

The second corner pressing plate 4 is inserted between any two adjacent second flange strips 9-1. Specifically, a second corner opening 900 is formed between any two adjacent second flange strips 9-1. The second corner pressing plate 4 is matched with the second corner opening 900 in shape, and the second corner pressing plate 4 is inserted into the second corner opening 900.

The sealing washer 2 comprises an outer frame pad 2-1, a middle frame pad 2-2 and an inner frame pad 2-3. And the middle frame cushion 2-2 is provided with a first convex frame 2-21 and a second convex frame 2-22 which respectively protrude along the two sides of the central line direction.

Wherein, a first straight groove 1-11 matched with the frame edge of the first convex frame 2-21 is arranged on the pressing surface of the first flange strip 1-1.

A second straight groove 9-11 which is matched with the frame edge of the second convex frame 2-22 is arranged on the pressing surface of the second flange strip 9-1.

The pressing surface of the first corner pressing plate 3 is provided with a first corner groove 3-1 which is used for being matched with the frame corner of the first convex frame 2-21. When assembling, the first convex frame 2-21 is inserted into the first angle groove 3-1.

The pressing surface of the second corner pressing plate 4 is provided with a second corner groove 4-1 which is used for being matched with the frame corner of the second convex frame 2-22. When assembling, the frame corners of the second convex frames 2-22 are inserted into the second corner grooves 4-1.

In the present embodiment, the peripheral clips 5 have two L-shaped outer shapes, and the two peripheral clips 5 surround a rectangular frame.

Specifically, the inner side wall of the internal corner of the peripheral clip 5 is provided with an L-shaped clip groove 5-1. The cross section of the clamping groove 5-1 is U-shaped.

Specifically, the cross section of the peripheral clip 5 has a U-shaped structure constituted by an upper plate portion 501, a side plate portion 502, and a lower plate portion 503. The upper plate 501 has a plurality of upper connection holes 5011, and the lower plate 502 has a plurality of lower connection holes 5031.

Referring to fig. 11, the first flange strip 1-1 is provided with a row of first connection holes 1-12. Referring to fig. 12, the second flange strip 9-1 is provided with a row of second coupling holes 9-12. The four frame edges of the outer frame cushion 2-1 are respectively provided with a row of third connecting holes 2-11.

The first flange strip 1-1, the frame edge of the outer frame cushion 2-1 and the second flange strip 9-1 are simultaneously positioned in the clamping groove 5-1 and fixedly connected with the outer frame clamp 5 through a first bolt 6.

The first bolt 6 passes through the upper connection hole 5011, the first connection holes 1 to 12, the third connection holes 2 to 11, the second connection holes 9 to 12 and the lower connection hole 5031 in sequence and then is matched and connected with the first nut 10 for locking.

The first corner pressing plate 3, the frame corner of the outer frame pad 2-1 and the second corner pressing plate 4 are simultaneously positioned in the clamping groove 5-1 and fixedly connected with the outer frame clamp 5 through a second bolt 7.

The first corner pressing plate 3 is provided with a fourth connecting hole 3-2, and the second corner pressing plate 4 is provided with a fifth connecting hole 4-2.

The second bolt 7 passes through the upper connection hole 5011, the fourth connection hole 3-2, the third connection hole 2-11, the fifth connection hole 4-2 and the lower connection hole 5031 in sequence and then is matched and connected with the second nut 11 for locking.

Furthermore, the end parts of the peripheral clamps 5 are provided with connecting lugs 5-2, and the connecting lugs 5-2 on two adjacent peripheral clamps 5 are fixedly connected through a third bolt 8.

Preferably, the cross section of the frame edge of the first convex frame 2-21 is in a dovetail shape; the cross section of the frame edge of the second convex frame 2-22 is in a dovetail shape.

The sealing washer 2 is made of elastic or deformable material (such as rubber).

This embodiment can be assembled by the following steps (see fig. 2-8):

s1, firstly, the sealing washer 2 is arranged between the first rectangular air duct 1 and the second rectangular air duct 9, and the four frame edges on the first convex frame 2-21 of the sealing washer 2 are inserted into the first straight grooves 1-11 on the four first flange strips 1-1; four frame edges on a second convex frame 2-22 are inserted into second straight grooves 9-11 on the four second flange strips 9-1, and the sealing gasket 2 is positioned and arranged between the first rectangular air pipe 1 and the second rectangular air pipe 9; the sealing gasket 2 is now positioned and restrained from displacement;

s2, inserting each first corner pressing plate 3 (four in total) into each two adjacent first flange strips 1-1 (namely into the first corner openings 100), and matching the first corner grooves 3-1 of the four first corner pressing plates 3 with the four corners of the first convex frames 2-21; inserting each second corner pressing plate 4 (four in total) into each two adjacent second flange strips 4-1 (namely, into the second corner openings 900), and simultaneously, matching the second corner grooves 4-1 of the four second corner pressing plates 4 with the four corners of the second convex frames 2-22;

s3, enclosing the two peripheral clips 5 into a rectangular frame, and simultaneously positioning the first flange strip 1-1, the frame edge of the outer frame pad 2-1 and the second flange strip 9-1 in the clip groove 5-1 of the peripheral clip 5; the first corner pressing plate 3, the frame corner of the outer frame pad 2-1 and the second corner pressing plate 4 are also simultaneously positioned in the clamping groove 5-1 of the peripheral clamp 5;

s4, the first bolt 6 penetrates through the upper connecting hole 5011, the first connecting holes 1-12, the third connecting holes 2-11, the second connecting holes 9-12 and the lower connecting hole 5031 in sequence and then is matched and connected with the first nut 10 for locking; the second bolt 7 sequentially penetrates through the upper connecting hole 5011, the fourth connecting hole 3-2, the third connecting hole 2-11, the fifth connecting hole 4-2 and the lower connecting hole 5031 and then is matched and connected with the second nut 11 for locking; and finally, the connecting lugs 5-2 on the two peripheral clamps 5 are locked and fixed through a third bolt 8.

The utility model has the following characteristics and analysis as follows:

Example two: this embodiment is substantially the same as the first embodiment, and is different from the first embodiment in that:

referring to fig. 16-17, in the present embodiment, the peripheral clips 5 have four strips, and the four peripheral clips 5 surround a rectangular frame.

Specifically, the side wall of the peripheral clip 5 is provided with a straight clip groove 5-1. The cross section of the clamping groove 5-1 is U-shaped. The two end parts of the four peripheral clamps 5 are respectively provided with a connecting lug 5-2, and the connecting lugs 5-2 on the two adjacent peripheral clamps 5 are fixedly connected through a third bolt 8. The four peripheral clips 5 are fixedly connected end to end in sequence to form a rectangular frame in a surrounding mode.

And the foregoing detailed description of the preferred embodiments of the invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A wind pipe flange connecting structure comprises a first rectangular wind pipe (1) and a second rectangular wind pipe (9), wherein four sides of a pipe orifice of the first rectangular wind pipe (1) are respectively provided with four first flange strips (1-1); four sides of the orifice of the second rectangular air duct (9) are respectively provided with four second flange strips (9-1); the method is characterized in that: the sealing device also comprises a sealing gasket (2), a first corner pressing plate (3), a second corner pressing plate (4) and a peripheral clamp (5);

the sealing washer (2) comprises an outer frame pad (2-1), a middle frame pad (2-2) and an inner frame pad (2-3), wherein the middle frame pad (2-2) is provided with a first convex frame (2-21) and a second convex frame (2-22) which respectively protrude from two sides along the direction of the central line of the middle frame pad;

a first straight groove (1-11) which is used for being matched with the frame edge of the first convex frame (2-21) is arranged on the pressing surface of the first flange strip (1-1); a second straight groove (9-11) which is matched with the frame edge of the second convex frame (2-22) is arranged on the pressing surface of the second flange strip (9-1);

the first corner pressing plate (3) is inserted between any two adjacent first flange strips (1-1), and a first corner groove (3-1) used for being matched with a frame corner of the first convex frame (2-21) is formed in the pressing surface of the first corner pressing plate (3);

the second corner pressing plate (4) is inserted between any two adjacent second flange strips (9-1), and a second corner groove (4-1) used for being matched with the frame corner of the second convex frame (2-22) is formed in the pressing surface of the second corner pressing plate (4);

the peripheral clip (5) is provided with a clip groove (5-1); the first flange strip (1-1), the frame edge of the outer frame pad (2-1) and the second flange strip (9-1) are simultaneously positioned in the clamping groove (5-1) and fixedly connected with the peripheral clamp (5) through a first bolt (6); the first corner pressing plate (3), the frame corner of the outer frame pad (2-1) and the second corner pressing plate (4) are simultaneously positioned in the clamping groove (5-1) and fixedly connected with the peripheral clamp (5) through a second bolt (7).

2. An air duct flange connection according to claim 1, wherein: the four peripheral clips (5) are strip-shaped, and the four peripheral clips (5) surround a rectangular frame.

3. An air duct flange connection according to claim 1, wherein: the two peripheral clips (5) are L-shaped, and the two peripheral clips (5) surround to form a rectangular frame.

4. A flange joint structure for an air hose according to claim 2 or 3, wherein: the end parts of the peripheral clamps (5) are provided with connecting lugs (5-2), and the connecting lugs (5-2) on the two adjacent peripheral clamps (5) are fixedly connected through a third bolt (8).

5. A flange joint structure for an air hose according to any one of claims 1 to 3, wherein: the cross section of the frame edge of the first convex frame (2-21) is in a dovetail shape or/and the cross section of the frame edge of the second convex frame (2-22) is in a dovetail shape.