Designed according to the principle of torque balance. Within the specified load displacement range, the load torque and spring torque are always in balance. Therefore, when pipes and equipment supported by a constant-hoisting mechanism undergo displacement, a constant supporting force is maintained, without imparting additional stress to the pipes and equipment. The constant-hoisting mechanism is generally used in situations where displacement stress needs to be reduced, such as in the main body of power station boilers, the steam, water, and flue gas ducts as well as burners in power plants, and in petrochemical equipment and other areas where displacement stress needs to be minimized.
Application and Scope:
This standard applies to variable spring suspension hangers with a displacement range of VS (0~180mm), TD (0~120mm), a load range of 154~217,384N, and a service temperature range of -20℃ to 200℃.
Method of Representation
The adjustable spring suspension consists mainly of cylindrical helical springs, displacement indicator plates, housing, and tension nuts, etc.
Variable spring suspension brackets are available in seven types: A, B, C, D, E, F, and G, differentiated by their installation methods.
Type A - Threaded Suspend Type
B Type ---- Single Ear Suspension Type
C Type - Dual-Ear Suspended Style
D-Type - Top Adjustable Shelves
E-type ---- Lower adjustable shelving type
F-type ---- Support Bracket Type
G Type --- Parallel suspended type
Installation and Usage:
Installation:
Type A
The end of the hanger is connected to the root; the other end is threaded into the top plate of the spring suspension bracket and secured with a nut. The bottom of the basket nut is threaded to the top of the pipe hanger, rotate the basket nut to lift the pipe to the designated installation position, then tighten with a nut.
B, C Types
The top of the spring suspension is connected to the lifting rod or lifting plate, with the other end of the lifting rod or plate anchored to the steel beam or floor. The rest is the same as the A-type.
3. D-Type
Secure the spring hanger to the steel beam or floor with bolts, thread the lifting rod through the hanger body to connect with the pipe, rotate the top nut to lift the pipe to the designated installation position, and then tighten the nut.
4. Type E
Secure the spring bracket to the steel beam or floor with bolts. The rest is the same as Type A.
F-Type
Secure the bottom plate of the spring suspension bracket to the foundation, steel beam, or floor with bolts, supporting the bottom of horizontal pipes or bends at the top. When the actual support height at the site differs from the designed installation height, adjust by rotating the load column for fine-tuning. The fine-tuning range is between Lmax and Lmin. The spring models VS30F0-9 are ±6mm, VS30F10-24 are ±12.5mm, and the spring models VS60F, VS90F, VS120F, VS150F, VS180F are ±25mm.
6. Type G
Swivel basket nuts to tighten the hanger mounted on steel beams or floor slabs, adjust the hanger bracket to the designed installation height, and then secure the basket nut with the nuts.
