Replacement of spring suspensions on site.
Replacing hangers on the object is being executed consecutively on each hanger. After blocking the rod and unscrewing the main nut, the old unit is disassembled. The new spring assembly is installed immediately, along with the setting of the appropriate load (Fig. 3). The replacement is carried out with the use of a hydraulic system, which allows for precise adjustment of the load in the replaced hanger and eliminates the risk of damaging the rod thread when unscrewing the main nut under load. There is no need to block or additionally suspend the structure on which the work is carried out, which increases the safety of the entire procedure.
Fig. 3. THERMEX spring assemblies supporting the waterwalls of the BFB-110 boiler combustion chamber.