CN201071999Y

CN201071999Y - Restriction type expansion joint for absorbing large axial and transverse complex displacement

Info

Publication number: CN201071999Y
Application number: CNU200720091990XU
Authority: CN
Inventors: 张爱琴; 高军松
Original assignee: LUOYANG SHUANGRUI SPECIAL STEEL TECHNOLOGY Co Ltd
Current assignee: Luoyang Sunrui Special Equipment Co Ltd
Priority date: 2007-09-26
Filing date: 2007-09-26
Publication date: 2008-06-11
Anticipated expiration: 2017-09-26

Abstract

The utility model relates to a restricted type expansion joint which can absorb larger complex displacement in axial direction and transverse direction. The restricted type expansion joint is composed of an end connecting pipe (1), a working vertical plate (2), a working corrugated pipe (3), a short assistant flap (4), a pin axle (5), a long main flap (6), a balancing vertical plate (7), a balancing corrugated pipe (8), a long assistant flap (9), a middle connecting pipe (10), a short main flap (11), and a loading and transporting fixed part. The center of the working corrugated pipes is the pin axle center of the flap, two sets of hinge devices which are composed of the main and assistant flaps and the pin axles are arranged at the outer side to absorb the transverse displacement, the pressure and the thrust force which are generated through the corrugated pipes are restricted through the flaps, the short main and assistant flaps are fixed on the end connecting pipe through the reinforced working vertical plate, the long main and assistant flaps are fixed on the middle connecting pipe through the balancing vertical plate, two sets of the long main and assistant flaps are staggered on the middle connecting pipe without the influence of the axial direction and transverse direction movement, and the working vertical plate for fixing the flap, the balancing vertical plate, and the middle connecting pipe adopt box type structures.

Description

A kind of can absorption axes to, the horizontal restricted type expansion joint of bigger compound displacement

Technical field

The utility model belongs to the expansion joint technical field, specially refer to a kind of can absorption axes to, the horizontal restricted type expansion joint of bigger compound displacement.

Background technique

Again on to be generated, the regenerator sloped tube of reaction system, use thermal compensation and stressed problem that expansion joint solves pipeline in refinery catalytic cracking unit two.Catalytic cracking unit two to be generated, the regenerator sloped tube two ends of reaction system is again connecting important catalytic cracking refining device, along with the continuous expansion of refinery catalytic cracking unit's scale changes, force request to the expansion joint on to be generated, the regenerator sloped tube is also more and more harsher, how to guarantee expansion joint in the course of the work can absorption axes to laterally bigger compound displacement, additional force and the moment minimum that connection device is caused is the key issue of expansion joint design again.The expansion joint that uses on original to be generated, regenerator sloped tube mostly is the compound free type expansion joint that has the ratio connecting rod means, is made up of pipe nipple, two groups of bellowss, middle shell rings and both sides ratio connecting rod means of being symmetrically distributed in expansion joint etc.Two groups of bellowss add intervalve combine be used for absorption axes to laterally bigger compound displacement.Though this compound free type expansion joint that has the ratio connecting rod means can satisfy the compound displacement request of compensation, but expansion joint itself can not retrain the pressure thrust that bellows produces, cause pressure thrust to act on the equipment to be generated, that the regenerator sloped tube two ends connect, this power also produces very big additional moment to the fixed support of entire equipment simultaneously, influence the stressed of whole system, this expansion joint in use needs reinforcement and props up (hanging) frame, is used for bearing additional force and the moment that expansion joint produces.

Two kinds of expansion joints of normal straight tube pressure-balancing type and single entry hinge type can both retrain the pressure thrust that bellows produces, and common straight pipe pressure-equalizing type expansion joint mainly absorbs axial displacement, and the ability that absorbs lateral displacement is very limited; Two cover single entry hinge type expansion joints combine and can absorb bigger lateral displacement, but can not absorb axial displacement; And axial and horizontal thermal walking to be generated, that regenerator sloped tube produces is all bigger, if adopt straight pipe pressure-equalizing type and hinge type expansion joint to compensate, then need to adopt two cover single entry hinge type expansion joints and a cover straight pipe pressure-equalizing type expansion joint to combine, could satisfy pipeline bit shift compensation and piping force request like this, but three cover expansion joints are installed on the pipeline, because to be generated, the regenerator sloped tube structure is special, the expansion joint length of installation is not enough again.

Summary of the invention

In order to address the above problem, the utility model provide a kind of can absorption axes to, the horizontal restricted type expansion joint of bigger compound displacement, this expansion joint can solve associated devices and system produces additional force and moment is excessive and the problem of the bigger compound bit shift compensation structure of expansion joint.

In order to realize the foregoing invention purpose, the utility model has adopted following technological scheme:

Described can absorption axes to, the restricted type expansion joint of horizontal bigger compound displacement, mainly by pipe nipple, the work riser, the work bellows, short secondary hinge plate, bearing pin, long main hinge plate, the balance riser, the balance bellows, long secondary hinge plate, middle adapter, short main hinge plate, the shipment fixed block is formed, its straight pipe pressure-equalizing type expansion joint agent structure remaining end is taken over, middle adapter, the work bellows, the balance bellows, make it be used for absorbing axial displacement, and remove the pull bar that it is used for retraining the bellows pressure thrust, then with bearing pin center, the center of two ends work bellows as hinge plate, lay by the master in its outside, the two cover hinge meanss that secondary hinge plate and bearing pin are formed, be used for absorbing lateral displacement, the pressure thrust that bellows produces is retrained by hinge plate, its short-and-medium master, secondary hinge plate is fixed on the pipe nipple by the work riser after reinforcing, long main, secondary hinge plate is fixed on the middle adapter by the balance riser after reinforcing, two covers are long main, secondary hinge plate interlaced arrangement on middle adapter, its the horizontal and axial motion and the work riser of fixed hinge plate are independent of each other, balance riser and middle adapter adopt case structure.

Owing to adopted technological scheme as mentioned above, the utlity model has following good effect:

1) this expansion joint has overcome the shortcoming that compound free type expansion joint self can not retrain the pressure thrust of bellows generation, the pressure thrust of utilizing hinge plate constraint bellows to produce has solved expansion joint associated devices and system has been produced additional force and the excessive problem of moment;

2) this expansion joint has merged the advantage of normal straight tube pressure-balancing type expansion joint and single entry hinge type expansion joint, and absorption axes has satisfied the compound bit shift compensation requirement when expansion joint is worked to laterally bigger compound displacement simultaneously;

3) this expansion joint compact structure, field joint is easy for installation.

Description of drawings

Fig. 1 be can absorption axes to, the horizontal restricted type expansion joint structural representation of bigger compound displacement;

Among Fig. 1: the 1-pipe nipple; The 2-riser of working; The 3-bellows of working; The short secondary hinge plate of 4-; The 5-bearing pin; The long main hinge plate of 6-; 7-balance riser; 8-balance bellows; The long secondary hinge plate of 9-; The 10-middle adapter; The short main hinge plate of 11-; 12-loads and transports fixed block.

Embodiment

As shown in Figure 1: of the present utility model can absorption axes to, laterally the restricted type expansion joint of bigger compound displacement is mainly by pipe nipple (1), work riser (2), work bellows (3), short secondary hinge plate (4), bearing pin (5), long main hinge plate (6), balance riser (7), balance bellows (8), long secondary hinge plate (9), middle adapter (10), short main hinge plate (11), shipment fixed block (12) is formed, its straight pipe pressure-equalizing type expansion joint agent structure remaining end is taken over (1), middle adapter (10), work bellows (3), balance bellows (8), make it be used for absorbing axial displacement, and remove the pull bar that it is used for retraining the bellows pressure thrust, then with bearing pin (5) center, the center of two ends work bellowss (3) as hinge plate, lay by the master in its outside, the two cover hinge meanss that secondary hinge plate and bearing pin (5) are formed, be used for absorbing lateral displacement, the pressure thrust that bellows produces is retrained by hinge plate, its short-and-medium master, secondary hinge plate (11,4) be fixed on the pipe nipple (1) by the work riser (2) after reinforcing, long main, secondary hinge plate (6,9) be fixed on the middle adapter (10) by the balance riser (7) after reinforcing, two covers are long main, secondary hinge plate (6,9) go up interlaced arrangement in middle adapter (10), its horizontal and axial motion is independent of each other, and the work riser (2) of fixed hinge plate, balance riser (7) and middle adapter (10) adopt case structure, with the proof strength designing requirement.Like this straight pipe pressure-equalizing type expansion joint and two single entry hinge type expansion joints are fused into one, just formed can absorption axes to the horizontal novel restricted type expansion joint of bigger compound displacement.

During work, when extraneous axial displacement acts on pipe nipple,, produce axial relative movement between the long major and minor hinge plate and reach the purpose that absorbs axial displacement by compression, the stretching of work bellows and balance bellows; When lateral displacement takes place in the expansion joint two ends, the work bellows at expansion joint two ends is that the center produces angular displacement with two secondary bearing pins of its outer middle side part, the middle adapter at balance bellows and two ends thereof is equivalent to one section steel pipe and is producing deflection, thereby reaches the purpose that absorbs big lateral displacement.The pressure thrust that bellows produces is absorbed by hinge plate.

As mentioned above, by on the straight pipe pressure-equalizing expansion joint, removing pull bar, set up two cover hinge meanss, be that straight pipe pressure-equalizing type expansion joint and two single entry hinge type expansion joints are fused into one, efficiently solve in the prior art catalytic cracking unit two again reaction system inclined tube expansion joint to be generated to associated devices and system produces additional force and moment is excessive and the bigger compound bit shift compensation structure problem of expansion joint.

This restricted type type expansion joint can also be used on other pipe and equipment that similar operating conditions requirement is arranged.

Claims

An energy absorption axes to, the restricted type expansion joint of horizontal bigger compound displacement, it is characterized in that: this restricted type expansion joint is mainly by pipe nipple (1), work riser (2), work bellows (3), short secondary hinge plate (4), bearing pin (5), long main hinge plate (6), balance riser (7), balance bellows (8), long secondary hinge plate (9), middle adapter (10), short main hinge plate (11), shipment fixed block (12) is formed, its straight pipe pressure-equalizing type expansion joint agent structure remaining end is taken over (1), middle adapter (10), work bellows (3), balance bellows (8), make it be used for absorbing axial displacement, and remove the pull bar that it is used for retraining the bellows pressure thrust, then with bearing pin (5) center, the center of two ends work bellowss (3) as hinge plate, lay by the master in its outside, the two cover hinge meanss that secondary hinge plate and bearing pin (5) are formed, be used for absorbing lateral displacement, the pressure thrust that bellows produces is retrained by hinge plate, its short-and-medium master, secondary hinge plate (11,4) be fixed on the pipe nipple (1) by the work riser (2) after reinforcing, long main, secondary hinge plate (6,9) be fixed on the middle adapter (10) by the balance riser (7) after reinforcing, two covers are long main, secondary hinge plate (6,9) go up interlaced arrangement in middle adapter (10), its the horizontal and axial motion and the work riser (2) of fixed hinge plate are independent of each other, balance riser (7) and middle adapter (10) adopt case structure.