Large pull rod transverse corrugated compensator (DLB): composed of two corrugated pipes connected by a middle pipe, as well as structural components such as pull rods, end plates, spherical and conical washers, mainly absorbing transverse displacement, and can also be used to compensate for axial, transverse, angular, and any direction of displacement synthesized from these three forms


Large pull rod transverse corrugated compensator (DLB):
Composed of two corrugated pipes connected by a middle pipe, as well as structural components such as tension rods, end plates, and spherical and conical washers, it mainly absorbs lateral displacement and can also be used to compensate for axial, lateral, angular, and any direction of displacement synthesized from these three forms. It is recommended to install a compound pull rod type expansion joint in the middle short pipe arm of a 90 ° Z-shaped pipeline to compensate for the axial displacement of the long pipeline at both ends. The large pull rod transverse corrugated compensator can compensate for the lateral displacement and small angular displacement of bent pipe sections, and is usually not used to compensate for angular displacement. The compensator consists of a connecting pipe, two corrugated pipes, and a large pull rod. It can absorb lateral displacement in any plane of the piping system. The displacement spherical nut rotates around the spherical washer, while the pull rod also has the ability to withstand internal pressure thrust.
Purpose:
The large pull rod transverse corrugated compensator can compensate for the lateral and angular displacement of curved pipelines
model:
Our company produces DN100-DN5000 with pressure levels ranging from 0.1Mpa to 2.5Mpa
Connection method: 1. Flange connection 2. Pipe connection
Product horizontal compensation amount: according to user requirements
1、 Model example:
Example: 0.6DLB500-FB-1500
Indicating: The nominal diameter is 500mm, the working pressure is 0.6MPa, and the length is 1500mm. It is a large pull rod transverse corrugated compensator connected by stainless steel flange.
2、 Instructions for use:
The large pull rod transverse corrugated compensator can compensate for the lateral and angular displacement of bent pipe sections.
3、 Calculation of the force exerted on the support by the large pull rod transverse corrugated compensator:
Lateral elasticity: Fy=Ky · Y Bending moment: M=Fy · L
In the formula: Ky lateral stiffness N/mm Y actual lateral displacement (deformation) mm
The distance m from the L-pipe rack to the midpoint of the compensator.
4、 Application example (without considering the correction of compensation amount and stiffness by temperature)
A certain carbon steel pipeline with a nominal diameter of 500mm, a working pressure of 0.6MPa, a medium temperature of 350 ℃, an ambient minimum temperature of -10 ℃, and a compensator installation temperature of 20 ℃. According to the pipeline layout (as shown in the figure), a large pull rod transverse compensator needs to be installed to compensate for the 160mm lateral displacement of the AB pipe section. The number of fatigue failures of the compensator is considered to be 15000 times, and the force on the support AC is calculated.
Solution: (1) According to the lateral displacement of AB pipe section
Y=160mm, 0.6DLB500-FB-2000 can be selected for sample inspection, with a lateral compensation of Y0=193mm and a lateral stiffness of Ky=22N/mm
(2) Calculation of stress on supports A and C
When calculating, consider "cold tightness" and the cold tightness can be taken as half of the actual compensation amount, which is 1/2Y.
FA=Ky · 160/2=22 × 80=1760 (N) MA=FA × 2=1760 × 2=3520 (N · m)
FB=Ky · 160/2=22 × 80=1760 (N) MB=FB × 2=1760 × 2=3520 (N · m)
Namely: A and C supports respectively bear a thrust of 1760 Newton and a force distance of 3520 Newton meters.