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A compensator is also habitually called expansion joints, or telescopic joints. Rubber Compensator is composed of the bellows (an elastic element) and the end pipe, bracket, flange, catheter and other accessories. It belongs to a compensation element. Use the effective expansion deformation of the main work bellows to absorb the size changes caused by pipelines, pipes, containers, or compensate for the axial, transverse and angular displacement of pipelines, pipes, containers, etc. It can also be used for noise reduction and vibration reduction. It is widely used in modern industries. In heating, in order to prevent the pipe deformation or damage caused by heat elongation or heat stress, Pipe Rubber Compensator is necessary to be set up on the pipe to compensate for the heat elongation of the pipe, so as to reduce the stress of the pipe wall and the force acting on the Valve parts or support structure.
Product classification:
Axial type: mainly used to compensate for axial displacement, but also can compensate for lateral displacement or axial and lateral synthetic displacement, with the ability to compensate for angular displacement, but generally no compensator of the general type to compensate for angular displacement. Requirements for pipe frame design:
1. For the pipe section of the axial compensator, the main fixed pipe frame should be set at the blind end, elbow and variable section, the department equipped with the stop valve or pressure relief valve and the side branch pipeline entering the entrance of the main line. The main fixed pipe frame should consider the role of bellows static pressure thrust and deformation elastic force. The thrust calculation formula is as follows: Fp=100 * P * A Fp-compensator axial pressure push (N), A-corresponding to the effective area of the corrugated average diameter (cm2), P-this section of the maximum pipe pressure (MPa). The axial elastic force is calculated as follows: F x: f x * Kx * X FX-compensator axial elastic force (N), KX-compensator axial stiffness (N/mm); f-coefficient, when "predeformation" (including pre-deformation amount △ X=0), f=1 / 2, otherwise f=1. In addition to the above parts, the pipe can be equipped with intermediate fixed pipe frame. The middle of the fixed pipe frame does not consider the role of pressure thrust.
2. Only one axial compensator can be set up between the two fixed pipe frames in the pipe section. 3. One end of the compensator should be close to the fixed pipe frame, if too long, it should be set according to the setting requirements of the first guide frame, the maximum spacing of other guide frame can be calculated below: LGmax-maximum guide spacing (m); E-pipe material elastic modulus (N / cm2); i-tp pipe section inertia moment (cm4); KX-compensator axial stiffness (N/mm), X0-compensation rated displacement (mm). When the compensator compression deformation, the symbol "+", stretch deformation, conform to "-". When the pipe wall thickness is designed according to the standard wall thickness, LGmax can be selected according to the relevant standards.
Transverse type: mainly absorb the lateral displacement and a small amount of axial displacement. Requirements for pipe frame design: 1. Transverse compensator installed near the pipe elbow, one of which should be the plane guide seat. The upper and lower activity gap is calculated as follows: -activity gap (mm); L-compensator effective length (mm); △ Y-pipe section thermal expansion (mm); △ X-heat expansion (mm) of vertical pipe section excluding L length (m m).
3. The guide support on both sides of the compensator shall be close to the compensator, and the type of the support shall make the PTFE Compensator directional movement.
Angle direction: composed of a receiver, bellows, and a pair of hinges connected to the receiver. It can only absorb the angular displacement of the single plane. In absorption displacement, two or three angular compensators should be combined, and the hinge has the ability to withstand internal pressure thrust. The Working temperature is 420℃, and the fatigue life is 1000 times.
Requirements for pipe frame design: The angular compensators should be used in two or three sets to absorb the lateral displacement of the pipe. Only one horizontal Pipe Compensator or one group of angular compensators is allowed to install between the two fixed pipe frames of the Z-shaped and L-shaped pipe segments. At this point, the axis of the plane hinge pin must be perpendicular to the plane formed by the curved pipe segment (the universal hinge compensator is not restricted). With a set of hinge compensators, the clearance of the plane guide frame can also be calculated according to the above formula. However, L length shall be the distance between the two hinge axes of the PTFE Compensator, and △ X is the amount of thermal expansion of the entire vertical pipe segment.
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