CN210716503U

CN210716503U - Low-resistance flow guide structure for high-temperature expansion joint

Info

Publication number: CN210716503U
Application number: CN201921214277.9U
Authority: CN
Inventors: 朱一萍; 李世乾; 杨玉强; 高翔; 李张治; 张道伟; 张爱琴
Original assignee: Luoyang Sunrui Special Equipment Co Ltd
Current assignee: 725th Research Institute of CSIC; CSSC Shuangrui Luoyang Special Equipment Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-06-09
Anticipated expiration: 2029-07-30

Abstract

A low-resistance flow guide structure for a high-temperature expansion joint is arranged in a pipe cavity enclosed by an outlet end pipe, a corrugated pipe and an inlet end pipe which are sequentially connected, and comprises a flow guide component II welded with the outlet end pipe and a flow guide component I welded with the inlet end pipe; the other end of the guide cylinder II is welded with the outer edge of the annular plate II, so that a gap is formed between the inner edge of the annular plate II and the other end of the lining cylinder II; the other end of the guide cylinder I is welded with the outer edge of the annular plate I, so that a gap is formed between the inner edge of the annular plate I and the other end of the lining cylinder I; the other end of the lining cylinder I is erected on the other end of the lining cylinder II, so that a gap is formed between the lining cylinder I and the lining cylinder II, and the annular plate I and the annular plate II are obliquely arranged in the medium flowing direction. Through the structure, coking is reduced, and expansion and cracking of the welding seam of the connecting ring between the lining cylinder and the cylinder section are avoided.

Description

Low-resistance flow guide structure for high-temperature expansion joint

Technical Field

The utility model relates to an expansion joint field, what specifically says is a low resistance water conservancy diversion structure for high temperature expansion joint.

Background

The metal bellows expansion joint is one of the key components for performing thermal compensation on modern heated pipe networks and equipment, and has the functions of displacement compensation, vibration reduction, noise reduction and sealing. With the development of modern chemical equipment operation conditions towards high parameters (severe working conditions such as high temperature, high pressure, corrosion, pollution, erosion and the like), the natural compensation mode is difficult to meet the requirement of pipeline thermal expansion, and a metal expansion joint is required to absorb the thermal displacement of a pipeline system. However, many process media contain precipitable substances and are easy to enter a cavity between the inner liner and the corrugated pipe to be accumulated and hardened to generate coking, and on one hand, the coking substances enter the cavity between the guide cylinder and the corrugated pipe to generate coking, and the coking substances are accumulated in the corrugated pipe to influence the compensation displacement capacity of the corrugated pipe; on the other hand, the medium enters a cavity between the lining cylinder and the guide cylinder, is easy to accumulate in a narrow connecting gap between the lining cylinder and the shell ring and generate coking, after coking, the welding seam of the lining cylinder and the shell ring is cracked, the welding seam of the lining cylinder is locally failed, and the lining cylinder falls off when serious, so that the safety of downstream products is affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a low resistance water conservancy diversion structure for high temperature expansion joint reduces the coking and avoids the go-between welding seam rising crack between bushing and shell ring.

In order to realize the technical purpose, the adopted technical scheme is as follows: a low-resistance flow guide structure for a high-temperature expansion joint is arranged in a pipe cavity enclosed by an outlet end pipe, a corrugated pipe and an inlet end pipe which are sequentially connected, and comprises a flow guide component II welded with the outlet end pipe and a flow guide component I welded with the inlet end pipe;

the guide assembly II consists of an inner lining cylinder II, a guide cylinder II and an annular plate II, the guide cylinder II is sleeved outside the inner lining cylinder II, the guide cylinder II and the inner lining cylinder II are coaxially arranged with the expansion joint, one end of the guide cylinder II and one end of the inner lining cylinder II are welded on the inner wall of the outlet end pipe, the other end of the guide cylinder II is welded with the outer edge of the annular plate II, and a gap is formed between the inner edge of the annular plate II and the other end of the inner lining cylinder II;

the guide assembly I consists of an inner lining cylinder I, a guide cylinder I and a ring plate I, the guide cylinder I is sleeved on the outer side of the inner lining cylinder I, the guide cylinder I and the inner lining cylinder I are coaxially arranged with the expansion joint, one ends of the guide cylinder I and the inner lining cylinder I are welded on the inner wall of the outlet end pipe, the other end of the guide cylinder I is welded with the outer edge of the ring plate I, and a gap is formed between the inner edge of the ring plate I and the other end of the inner lining cylinder I;

the other end of the lining cylinder I is erected on the other end of the lining cylinder II, so that a gap is formed between the lining cylinder I and the lining cylinder II, and the annular plate I and the annular plate II are obliquely arranged in the medium flowing direction.

The ring plate I and the ring plate II are arranged in parallel.

The inclination angle of the ring plate I and the ring plate II is 30-60 degrees.

The utility model has the advantages that: by changing the straight-edge type flow guide structure into an inclined flow guide structure, on one hand, the flow guide structure can effectively reduce the medium entering a cavity between the flow guide cylinder and the corrugated pipe, and avoid coking from influencing the displacement compensation capability of the corrugated pipe; on the other hand, the inclined ring plate can effectively reduce the medium from entering the cavity between the lining cylinder and the guide cylinder, avoid the expansion crack failure of the connecting ring welding seam between the lining cylinder and the cylinder section caused by coking, and ensure the structure safety.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the first position of the present invention;

1. inlet end pipe 2, interior bushing I, 3, insulating layer I, 4, draft tube I, 5, flap subassembly I, 6, sweep the device, 7, ring board I, 8, round pin axle, 9, ring board II, 10, bellows, 11, flap subassembly II, 12, protection casing, 13, draft tube II, 14, insulating layer II, 15, interior bushing II, 16, outlet end pipe.

Detailed Description

The utility model provides a low resistance water conservancy diversion structure for high temperature expansion joint, the setting outlet end pipe 16 that connects gradually, the lumen that bellows 10 and inlet end pipe 1 enclose becomes, this structure can be used to single hinge type expansion joint, compound universal hinge type, single universal hinge type, axial expansion joint, balanced type expansion joint etc. these expansion joints all include the device that sweeps in the bellows, the water conservancy diversion structure include with outlet end pipe 16 welded water conservancy diversion subassembly II and with inlet end pipe 1 welded water conservancy diversion subassembly I.

The flow guide assembly II is composed of an inner lining barrel II 15, a flow guide barrel II 13 and an annular plate II 9, the flow guide barrel II 13 is sleeved outside the inner lining barrel II 15, the flow guide barrel II 13 and the inner lining barrel II 15 are arranged coaxially with an expansion joint, one end of the flow guide barrel II 13 and one end of the inner lining barrel II 15 are welded on the inner wall of the outlet end pipe 16, the other end of the flow guide barrel II 13 is welded with the outer edge of the annular plate II 9, the welding position preferably completely corresponds to the welding position, the flow guide barrel II 13 does not exceed the position of the annular plate II 9, a gap is formed between the inner edge of the annular plate II 9 and the other end of the inner lining barrel II 15, the other end of the inner lining barrel II 15 does not exceed the position of the inner edge of the annular plate II 9, the gap is protected, blocking is not performed, the flow guide barrel II 13 and the inner lining barrel II 15 can deform when being subjected to thermal contraction due to existence of the gap.

Flow guide assembly I is by interior bushing I2, draft tube I4 and crown plate I7 are constituteed, I4 cover of draft tube is established in the I2 outside of interior bushing, draft tube I4 and interior bushing I2 and expansion joint coaxial line set up, the one end welding of draft tube I4 and interior bushing I2 is on the inner wall of import end pipe 1, the other end of draft tube I4 and with the outer border welding of crown plate I7, the I4 border of draft tube of this position corresponds the welding completely with the outer border of crown plate I7, and simultaneously, make and be equipped with the clearance between the interior border of crown plate I7 and the other end of interior bushing I2, the existence in clearance can make draft tube I4 and interior bushing I2 when receiving expend with heat and contract with cold, can take place the deformation, guarantee structure safety. The gaps are moving gaps, and the gap is not connected with the inner lining cylinder, but is not easy to be too large, so that the precipitable substances are prevented from entering between the guide shell and the inner lining cylinder from the gaps.

The other end of the lining cylinder I2 is erected at the other end of the lining cylinder II 15, a gap is formed between the lining cylinder I2 and the lining cylinder II 15, the ring plate I7 and the ring plate II 9 are obliquely arranged in the medium flowing direction, the arrangement has the function of guiding flow, and meanwhile turbulence is prevented from being generated at the position.

And a medium enters a space between the annular plate I7 and the annular plate II 9 from a gap between the lining barrel I2 and the lining barrel II 15 and then enters the corrugated pipe to push the corrugated pipe to realize displacement compensation.

The annular plate I7 and the annular plate II 9 are arranged in parallel, so that the use balance of the expansion joint can be further ensured.

The inclination angle of the ring plate I7 and the ring plate II 9 is 30-60 degrees, preferably 45 degrees, the inclination angle refers to the included angle between each ring plate and the right side direction of the corresponding lining plate, a certain included angle is formed, coking can be reduced, the length of a channel between the ring plates is lengthened through the inclined arrangement, and the size of an expansion joint does not need to be changed. Compared with a straight-edge type, the inclined flow guide structure can effectively reduce the phenomenon that the sedimentary medium enters a cavity between the flow guide cylinder and the corrugated pipe and a cavity between the lining cylinder and the flow guide cylinder under the action of the blowing medium, thereby reducing the generation of coking, and avoiding the influence on the displacement compensation capacity of the corrugated pipe or the cracking failure of the welding seam of the lining cylinder and the shell ring connecting ring.

Claims

1. The utility model provides a low resistance water conservancy diversion structure for high temperature expansion joint, sets up the lumen that outlet end pipe (16), bellows (10) and inlet end pipe (1) that connect gradually enclose, its characterized in that: the flow guide structure comprises a flow guide component II welded with the outlet end pipe (16) and a flow guide component I welded with the inlet end pipe (1);

the guide assembly II consists of an inner lining cylinder II (15), a guide cylinder II (13) and an annular plate II (9), the guide cylinder II (13) is sleeved outside the inner lining cylinder II (15), the guide cylinder II (13) and the inner lining cylinder II (15) are coaxially arranged with the expansion joint, one end of the guide cylinder II (13) and one end of the inner lining cylinder II (15) are welded on the inner wall of the outlet end pipe (16), the other end of the guide cylinder II (13) is welded with the outer edge of the annular plate II (9), and a gap is formed between the inner edge of the annular plate II (9) and the other end of the inner lining cylinder II (15);

the guide assembly I consists of an inner lining cylinder I (2), a guide cylinder I (4) and a ring plate I (7), the guide cylinder I (4) is sleeved on the outer side of the inner lining cylinder I (2), the guide cylinder I (4) and the inner lining cylinder I (2) are coaxially arranged with an expansion joint, one ends of the guide cylinder I (4) and the inner lining cylinder I (2) are welded on the inner wall of an outlet end pipe (16), the other end of the guide cylinder I (4) is welded with the outer edge of the ring plate I (7), and a gap is formed between the inner edge of the ring plate I (7) and the other end of the inner lining cylinder I (2);

the other end of the lining cylinder I (2) is erected on the other end of the lining cylinder II (15), so that a gap is formed between the lining cylinder I (2) and the lining cylinder II (15), and the ring plate I (7) and the ring plate II (9) are obliquely arranged in the medium flowing direction.

2. A low resistance flow guide structure for a high temperature expansion joint as claimed in claim 1 wherein: the ring plate I (7) and the ring plate II (9) are arranged in parallel.

3. A low resistance flow guide structure for a high temperature expansion joint as claimed in claim 1 wherein: the inclination angle of the ring plate I (7) and the ring plate II (9) is 30-60 degrees.