The vibration isolation pedestal, also called "inertia fast", is located under the base of the water pump unit to control the quality of vibration generated by the water pump unit during operation, so that the vibration isolation can achieve better vibration isolation effect according to the characteristics of the water pump unit. The specific measures are as follows:
Design
1. A damping pedestal is set under the base of the water pump unit; The layout of the pump unit on the vibration damping pedestal shall strive to make the center of gravity of the pump unit and all accessories and the plane center of the vibration damping pedestal on the same vertical line;
2. The size of the damping pedestal shall be determined according to the following provisions:
a. The length shall not be less than the length of the common base of the pump unit;
b. The width shall not be less than the width of the common base of the pump unit, and the distance from the center of the anchor bolt of the common base to the edge of the inert block shall not be less than 150mm;
c. The height is 1/10-1/8 of the length, and not less than 150mm;
3. The mass of the damping pedestal shall not be less than the total mass of the pump unit; Generally, it should be 1.5-2 times of the total mass of the pump unit;
structure
1. The structure of damping pedestal is: channel steel is welded around; The middle is mesh reinforcement, and the bottom is galvanized steel plate; Intermediate pouring concrete; The upper surface is smooth;
2. Concrete grade shall not be less than C40; 30 # channel steel; The thickness of galvanized steel plate is 1.5mm; The rebar is 12mm deformed steel bar;
3. The size of the damping pedestal is calculated as an integral multiple of 10mm. The damping pedestal is fixed to the base of the pump unit in a solid installation way. The upper surface of the damping pedestal is reserved with pouring holes to fix the base of the pump unit;
4. At 40cm above the bottom of the shock absorption pedestal, 12mm reinforcing bars shall be laid with a spacing of less than 160mm, welded in two directions in a crisscross manner, and reinforcement measures shall be added for special parts according to the actual structure;
5. The shock absorption pedestal and the bottom surface shall be fixed, and the shock absorption pedestal shall be reserved with bolt holes; The expansion nut is used on the cement foundation, and the fixing bolt passes through the shock absorption pedestal and cushion, and is fastened on the expansion nut; The strength makes it fixed;