Steel lining polytetrafluoroethylene pipe compensator
A technology of lining PTFE pipes and compensators, which is applied in the field of anti-corrosion of pipe fittings, can solve the problems of shortening the life of compensators, affecting the sealing performance, short flanging, etc., and achieving the effects of ensuring sealing performance, improving stability and tight connection.
Inactive Publication Date: 2020-05-05
湖北世纪伟业防腐科技有限公司
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Problems solved by technology
[0004] When the compensator still has the following problems: 1), the PTFE lining is an integral structure composed of a PTFE lining plate and a PTFE film, and the flanging at the connection between the PTFE lining and the flange is four The fluorine-lined pipe is hot-melted for a certain length and then extruded directly, and the flanging is generally shorter
For large expansion joints (such as expansion joints with a diameter of 5 meters to 6 meters), the flanging requirements are relatively large. It is completely covered by the PTFE lining, which not only affects the sealing performance but also causes strong acid and strong alkali to corrode the flange, which greatly reduces the life of the compensator; in addition, if the temperature difference of the working pipeline is large or due to the When the mechanical vibration is high, the stability of the compensator will be greatly reduced
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[0020] Such as Figure 1-2 As shown, a steel-lined PTFE tube compensator includes a bellows 1, a flange 2 and a PTFE lining 3, and the PTFE lining 3 is a PTFE lining.
[0021] Generally, in order to ensure the connection, both ends of the pipe fittings are equipped with flanges, and the larger the diameter of the pipe fittings, the larger the corresponding flange diameter, and the longer the length between the inner and outer diameters of the flanges.
[0022] In order to ensure the corrosion resistance of the pipe fittings, the two ends of the PTFE tube generally need to be flanged, and the flanging should cover the surface of the flange. Due to the large size of some pipe fittings, the corresponding length of flanging will also increase, which not only brings a certain degree of difficulty to flanging, but also because the flanging length is too long, and the flanging is formed by extruding after the pipe is melted. Therefore, if the length of the flange after secondary pro...
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A steel lining polytetrafluoroethylene pipe compensator comprises a corrugated pipe, a flange and a polytetrafluoroethylene lining, wherein the polytetrafluoroethylene lining comprises a polytetrafluoroethylene corrugated pipe body, a flanging and connecting rings; the flanging is integrated with the connecting rings through hot pressing; one end of each connecting ring is provided with a convex surface, and the other end of each connecting ring is provided with a concave surface; and the lower ends of the concave surfaces are provided with elastic sealing rings, and the elastic sealing ringsare arranged in grooves of the end surfaces of the flange. According to the steel lining polytetrafluoroethylene pipe compensator, the service life of the compensator can be prolonged.
Description
technical field [0001] The invention relates to the anticorrosion field of pipe fittings, in particular to a steel-lined PTFE pipe compensator. Background technique [0002] The existing PTFE-lined bellows expansion joint includes flanges, bellows, and PTFE lining. The bellows are fixedly connected to the flanges at both ends to form a bellows compensation structure. The PTFE lining is attached to the inner surface of the bellows. The lining is made of PTFE film wound and then sintered. This PTFE-lined bellows expansion joint can not only be used in pipeline systems to compensate for length, temperature, position and angle, but also has a certain corrosion resistance because of its lining with PTFE, and can be widely used It is used in pipeline systems that transport corrosive media. However, this PTFE-lined bellows expansion joint has the following defects: the PTFE lining formed by winding and sintering the PTFE film has low density, poor elongation, and is prone to smal...
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Login to View More IPC IPC(8): F16L51/02
CPCF16L51/02
Inventor 薛家伟谭银昌王东海
Owner 湖北世纪伟业防腐科技有限公司