CN213394015U

CN213394015U - Air pipe assembly for improving air tightness of connecting part

Info

Publication number: CN213394015U
Application number: CN202022103882.8U
Authority: CN
Inventors: 李国帅; 杨茂盛; 冯涛
Original assignee: China Railway Construction Engineering Group Co Ltd; Construction and Installation Co Ltd of China Railway Construction Engineering Group Co Ltd
Current assignee: China Railway Construction Engineering Group Co Ltd; Construction and Installation Co Ltd of China Railway Construction Engineering Group Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-06-08
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to an improve tuber pipe subassembly of connection position gas tightness, including tuber pipe, fixed mounting at the flange at tuber pipe both ends, pass through between two tuber pipes flange fixed connection, two the junction of flange is provided with the spring clamp still be provided with the rivet in the both sides of spring clamp, the rivet passes the mounting hole of seting up on two flanges of junction in proper order, with two flange interference fit; the rivet can increase the joint strength of the joint of the two flanges, improve the air tightness of the air pipe at the joint of the pipe joints, and generally has the problem of poor air tightness at the joint of the pipe joints for the air pipes with large pipe diameters and connected by the thin steel plate flanges.

Description

Air pipe assembly for improving air tightness of connecting part

Technical Field

The utility model relates to an air pipe assembly, concretely relates to improve air pipe assembly of connection position gas tightness, it includes the flange at tuber pipe and fixed mounting at the tuber pipe both ends.

Background

At present, the connection mode between the air pipe sections is mainly characterized in that flanges arranged at two ends of an air pipe are connected with each other, and more angle steel flanges and steel sheet flanges are used, and the connection mode of the angle steel flanges generally has the characteristics of stable structure and better sealing performance, but the cost is generally higher, and the construction and installation process is more complicated; compared with an angle steel flange, the thin steel plate flange has the characteristics of better economy and convenience in installation, but because the flange edge of the thin steel plate flange is made of a thin steel plate, the strength of the flange edge after installation is insufficient, and the air tightness between flange connection surfaces is not high; in order to solve this problem, the prior art mainly solves the problem by the following two ways: 1. the spring clamp is arranged to clamp the two connected flanges, so that the bonding strength between the two flanges is enhanced, and the sealing performance of the air pipe is improved. 2. Set up the jackscrew card, through jackscrew card and bolt cooperation, increase the joint strength between two flanges, improve the sealing performance of tuber pipe, though jackscrew card intensity is enough, the great unevenness of volume influences outer heat preservation construction, and the jackscrew card does not have spring shim moreover, and the screw mouth is not hard up easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an improve tuber pipe subassembly of connection position gas tightness, it can solve among the prior art defect that the tuber pipe passes through the flange joint gas tightness not enough, has improved the gas tightness of tuber pipe effectively.

In order to achieve the purpose, the specific technical scheme is as follows:

the utility model provides an improve tuber pipe subassembly of connection position gas tightness, including tuber pipe, fixed mounting at the flange at tuber pipe both ends, pass through between two tuber pipes flange fixed connection, two the junction of flange is provided with the spring clamp the both sides of spring clamp still are provided with the rivet, the rivet passes the mounting hole of seting up on two flanges of junction in proper order, with two flange interference fit.

The utility model discloses a junction at two flanges of connecting sets up the spring clamp, has improved the compactness of two flange joint to and set up the rivet in the spring clamp both sides, can compensate the defect that the spring clamp force is not enough, further improve the joint strength between two flanges, make the tuber pipe can bear bigger wind pressure, has better gas tightness.

Furthermore, the inside anti-wind pressure screw rod device that is provided with of tuber pipe, the upper and lower surface of tuber pipe is passed respectively at the both ends of anti-wind pressure screw rod device, with the upper and lower fixed surface of tuber pipe is connected.

The utility model discloses a setting improves at the inside anti-wind pressure screw rod device of tuber pipe the anti-wind pressure performance of tuber pipe wall prevents the tuber pipe warp the damage under the effect of wind pressure.

Furthermore, the flange is provided with a groove with an opening facing the two flange connecting surfaces, the upper end and the lower end of the groove are straight edges, the groove is internally provided with a second sealing ring matched with the groove, and the cross section of the second sealing ring is O-shaped.

The utility model discloses install in the recess between two flanges the second sealing washer, the second sealing washer keeps apart gas in the tuber pipe with the external world, has improved the gas tightness of tuber pipe, prevents that the gas in the tuber pipe from leaking, has also avoided rigid connection between two flanges simultaneously.

Furthermore, a first sealing ring is further installed above the second sealing ring, the cross section of the first sealing ring is in a long strip shape, and the first sealing ring is fixedly installed between straight edges of the upper ends of the two flanges.

The utility model discloses the top of second sealing washer still is provided with first sealing washer, the laminating of first sealing washer is between the upper end straight flange of a flange even, with the second sealing washer has constituted bilayer seal structure together, has further improved the gas tightness of flange joint department.

Furthermore, the pipe wall of the air pipe comprises an inner pipe wall and an outer pipe wall, and a hollow interlayer is arranged between the inner pipe wall and the outer pipe wall.

Furthermore, the hollow partition layer between the inner pipe wall and the outer pipe wall is filled with foaming materials.

The utility model discloses an tuber pipe includes outer pipe wall and interior pipe wall, forms the cavity interlayer between interior pipe wall and the outer pipe wall the cavity interlayer is filled there is sound insulation material, at the tuber pipe during operation, can shield most noises.

Furthermore, a plurality of groups of parallel support rods are arranged in the hollow partition layer, one ends of the support rods are fixedly connected with the inner pipe wall, and the other ends of the support rods are fixedly connected with the outer pipe wall.

To sum up, the utility model provides a pair of improve tuber pipe subassembly of connecting position gas tightness can effectively improve the gas tightness of two tuber pipe flange joint faces.

Drawings

FIG. 1 is a schematic view of the air duct structure;

FIG. 2 is a cross-sectional view of a flanged connection;

FIG. 3 is a cross-sectional view of the wall of the air duct;

FIG. 4 is a schematic view of the connection of the wind pressure resistant screw of the negative pressure air duct;

FIG. 5 is a schematic view of the connection of the wind pressure resistant screw of the negative pressure air duct;

fig. 6 is a spring clip mounting position table.

Reference numerals:

1-air pipe; 2-a flange; 3-a first sealing ring; 4-a second sealing ring; 5-a groove; 6-inner pipe wall; 7-outer tube wall; 8-hollow interlayer; 9-wind pressure resistant screw rod device; 10-a support bar; 11-rivets; 12-spring clip.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1-2 show an air duct for improving the air tightness of a connection part, which comprises two air ducts 1 and flanges 2 fixedly installed at two ends of the air ducts 1, wherein the two air ducts 1 are fixedly connected through the flanges 2, a spring clamp 12 is arranged at the joint of the two flanges 2, rivets 11 are further arranged on two sides of the spring clamp 12, and the rivets 11 sequentially pass through mounting holes formed in the two flanges 2 at the joint and are in interference fit with the two flanges 2.

In this embodiment, a spring clamp 12 is arranged between the joints of the flanges 2, the spring clamp 12 provides locking force for the flanges 2 at the joints in a clamping manner, rivets 11 are further arranged on two sides of the spring clamp 12, the rivets 11 penetrate through mounting holes in the two flanges 2 at the joints and are fixedly connected with the two flanges 2 through interference fit, the spring clamp 12 and the rivets 11 provide locking force for the flanges 2 at the joints together, and the method can effectively cover all parts of the joints of the flanges, so that the bonding strength between the two flanges 2 is increased, and the air tightness of the air duct 1 is improved.

Specifically, the transverse section of the air duct 1 is rectangular, the flange 2 is made of thin steel plate flanges, and is also rectangular, four side edges of the flange 2 are fixedly connected with four side edges of the air duct 1, threaded holes are formed in four corners of the thin steel pipe flanges, and bolts are fixedly connected with nuts after passing through threaded holes in the two flanges 2, so that the two flanges 2 have bonding force with enough strength at the four corners, because the length of the flange side edges at two ends of the air duct 1 is generally long, the bolt bonding force is insufficient to provide enough locking force for the flanges at two ends of the air duct 1, and the spring clamp 12 needs to be clamped at the position where the two flanges 2 are connected, because the spring clamp 12 is made of thin steel plates, only limited locking force can be provided, rivets 11 need to be additionally arranged on two sides of the spring clamp 12, and the rivets 11 pass through mounting holes in the two flanges 2, the rivet 11 and the flange 2 are in interference fit, so that the two flanges 2 are connected more tightly, the spring clips 12 are mounted on the flange of the flange 2, and the number of the spring clips 12 can be selected according to the wind pressure in the air duct 1 and the length of the flange of the air duct 1, as shown in fig. 6, according to the national standard drawing set 07K133, the installation position of the spring clamp 12 has specific installation instructions with the wind pressure of the air pipe 1 and the length of the flange side edge of the air pipe 1, except that only one side of the two spring clamps 12 at the two ends of the flange side edge 2 is provided with the rivet 11, i.e. the position between the spring clips 12 at both ends and the corner of the flange 2 flange does not require the mounting rivets 11, rivets 11 are mounted on two sides of each of the other spring clamps 12, in fig. 6, the hatched portion is the position of the spring clamp 12, the standard size L of the spring clamp 12 is 150mm, and the height of the air duct flange is 30mm or 35 mm.

As shown in fig. 1, an anti-wind pressure screw device 9 is arranged inside the wind pipe 1, and two ends of the anti-wind pressure screw device 9 respectively penetrate through the upper surface and the lower surface of the wind pipe 1 and are fixedly connected with the upper surface and the lower surface of the wind pipe 1 through nuts. For the medium-high pressure air pipe 1, a reinforcing device is often required to be arranged to increase the strength of the pipe wall of the air pipe 1, the wind pressure resistant screw device 9 is a commonly used one, the wind pressure resistant screw device 9 comprises a screw, a reinforcing gasket, a rubber gasket, a first nut, a second nut and a special gasket, the special gasket is a circular gasket with an M-shaped cross section, the area of the special gasket is large, and a larger area of supporting force can be provided for the surface of a circular pipe; as shown in fig. 4, as an embodiment, for the negative pressure air duct 1, the screw rod passes through a first nut and a special washer, then passes through a mounting hole on the air duct 1, and is connected with a rubber washer, a reinforcing washer and a second nut in sequence; as shown in fig. 5, as another embodiment, for the positive pressure air duct 1, the screw rod passes through the first nut, the reinforcing washer and the rubber washer from bottom to top, then passes through the mounting hole on the air duct 1, and is connected with the special washer and the second nut in sequence.

In fig. 2, optimally, a groove 5 with an opening direction facing the connecting surface of the two flanges 2 is formed in each flange 2, a second sealing ring 4 adapted to the groove 5 is installed in the groove 5, the cross section of the second sealing ring 4 is O-shaped, the O-shaped sealing ring has good sealing performance, and the second sealing ring 4 directly contacts with the gas in the air pipe 1 to play a main sealing role; a first sealing ring 3 is arranged above the second sealing ring 4, the cross section of the first sealing ring 3 is in a long strip shape and is fixedly arranged between the connecting surfaces of the two flanges 2 to serve as an air tightness compensating device, and the first sealing ring 3 can prevent gas leakage under the condition that the air tightness of the second sealing ring 4 is insufficient; the first sealing ring 3 and the second sealing ring 4 jointly form a double-layer sealing device, so that the air tightness of the air pipe 1 can be effectively improved, and the rigid connection of the two flanges 2 is also avoided.

As shown in fig. 3, optimally, the wall of the air duct 1 includes an inner duct wall 6 and an outer duct wall 7, a hollow interlayer 8 is disposed between the inner duct wall 6 and the outer duct wall 7, and the hollow interlayer 8 is filled with a foam material, which has good sound insulation and heat insulation effects and has a good absorption effect on heat and noise generated in the air duct 1.

As shown in fig. 3, preferably, a plurality of parallel support rods 10 are further disposed in the gap between the inner pipe wall 6 and the outer pipe wall 7, one end of each support rod 10 is fixedly connected to the inner pipe wall 6, and the other end is fixedly connected to the outer pipe wall 7, and the support rods 10 provide a supporting force between the inner pipe wall 6 and the outer pipe wall 7, so as to prevent the outer pipe wall 7 of the air pipe 1 from being deformed and damaged.

As shown in fig. 4, M10 nuts, reinforcing washers, rubber washers, air duct outer sides, special washers, M10 galvanized harness screws are provided.

As shown in fig. 5, M10 nuts, reinforcing washers, rubber washers, air duct outer sides, special washers, M10 galvanized harness screws are provided.

As shown in FIG. 6, the side lengths of the air ducts are 1350-1500 mm (limited to the air pressure of 500Pa or less), the side lengths of the air ducts are 1050-1350 mm (limited to the air pressure of 1500Pa or less), the side lengths of the air ducts are 750-1050 mm (limited to the air pressure of 1500Pa or less), the side lengths of the air ducts are 450-750 mm (limited to the air pressure of 1500Pa or less), and the side lengths of the air ducts are 200-450 mm (limited to the air pressure of 1500Pa or less).

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides an improve tuber pipe subassembly of connection position gas tightness, includes tuber pipe (1), flange (2) of fixed mounting at tuber pipe (1) both ends, passes through between two tuber pipes (1) flange (2) fixed connection, its characterized in that: the connecting part of the two flanges (2) is provided with a spring clamp (12), rivets (11) are further arranged on two sides of the spring clamp (12), and the rivets (11) sequentially penetrate through mounting holes formed in the two flanges (2) at the connecting part and are in interference fit with the two flanges (2).

2. The air duct assembly for improving the air tightness of the connection part according to claim 1, wherein a wind pressure resistant screw device (9) is arranged inside the air duct (1), and two ends of the wind pressure resistant screw device (9) respectively penetrate through the upper surface and the lower surface of the air duct (1) and are fixedly connected with the upper surface and the lower surface of the air duct (1).

3. The air duct assembly for improving air tightness of a connection part according to claim 1, wherein: offer recess (5) that the opening direction was connected the face towards two flanges (2) on flange (2), install second sealing washer (4) rather than the adaptation in recess (5), the cross sectional shape of second sealing washer (4) is the O type.

4. An air duct assembly for improving air tightness of a joint according to claim 3, wherein: and a first sealing ring (3) is further installed above the second sealing ring (4), the cross section of the first sealing ring (3) is in a long strip shape, and the first sealing ring is fixedly installed between the connecting surfaces of the two flanges (2).

5. An air duct assembly for improving air tightness of a joint according to claim 1, wherein: the pipe wall of the air pipe (1) comprises an inner pipe wall (6) and an outer pipe wall (7), and a hollow interlayer (8) is arranged between the inner pipe wall (6) and the outer pipe wall (7).

6. An air duct assembly for improving air tightness of a joint according to claim 5, wherein: and a hollow interlayer (8) between the inner pipe wall (6) and the outer pipe wall (7) is filled with foaming materials.

7. An air duct assembly for improving air tightness of a connection part according to claim 6, wherein: a plurality of groups of parallel support rods (10) are further arranged in the hollow interlayer (8), one end of each support rod (10) is fixedly connected with the inner pipe wall (6), and the other end of each support rod is fixedly connected with the outer pipe wall (7).