Universal rotating spherical compensator in steam heat network pipeline

Generally speaking, the sealing of the rotary compensator includes annular sealing and end sealing. The annular seal is generally sealed by the pressure of the sealing gland. During use, the sealing material is tightly bonded to the rotating inner cylinder and the sealing seat. Even if some small leaks occur occasionally, they can be solved by tightening the gland bolts. Since the coefficient of thermal expansion of the ring seal material is higher than that of steel, it provides better sealing performance in steam heat network piping. Compared with annular seal, the biggest feature of end seal is that it has self-sealing function, and this self-sealing performance can be better and better with the increase of medium pressure. Due to the characteristics of the end face seal material, it shows good sealing effect in high pressure steam and can be cancelled in low pressure steam. The friction coefficient of the end face seal subjected to blind force during use is an important factor in the torque of the rotary compensator, so it must be ensured to have sufficient strength and focus on controlling its friction coefficient during use.
One of the biggest advantages of the rotary compensator is that it can be heated over long distances, but some attention needs to be paid when installing it over long distances. Generally speaking, the farther the fixed support is, the larger the thermal displacement is. In order to avoid pipe off-frame, attention should be paid to the selection of sufficiently long pipe bracket, and the pipe bracket should be along the opposite of the pipe thermal expansion; install guide bracket in a certain pipe section to ensure the safety of the whole heating network; considering that the rotary compensator will have a certain lateral displacement during the swinging process, the installation of guide bracket near the compensator should be avoided to limit the lateral displacement; although the rotary compensator has excellent compensation ability, it cannot be arranged It should be very long, but should choose the appropriate layout spacing on the basis of full reference to the design temperature. Generally speaking, if the design temperature ≤300℃, the layout spacing can be controlled within 450m, once the design temperature > 300℃, the layout spacing should be reduced accordingly.
Universal rotating spherical compensator, according to the usual practice, the axial rotating compensator is laid out near the fixed bracket, and then connected with two guide brackets, the distance is 4Dg, 14Dg, the main purpose is to prevent its axial instability. The steam direct buried pipe is supported or guided by the insulation material and the jacket steel pipe. The hot water direct buried pipe is mainly controlled by the soil and sand layer, formed with the insulation material. We believe that solving the problem of axial instability of rotary compensator depends not only on its arrangement and setting position, but also on the performance and quality of rotary compensator itself. The performance and quality requirements of the rotary compensator arranged only on the side of the fixed support should be higher, and the segmentation distance of the pipe should be generally smaller. When selecting the type, it is necessary to choose the rotary compensator with good self-guidance and strong anti-destabilization ability. Design layout according to the basic principles, according to the actual situation of the project flexible treatment. The actual situation confirms that the rotary compensator can be set in any position of the two fixed supports as long as the guiding structure is well controlled.