What are the specific measures for pipeline installation and vibration isolation of vertical acid an

The pipeline installation should meet the following requirements:

1) The inside of the pipeline and the end of the pipe should be cleaned, the sealing surface and thread should not be damaged, and the flange end face or thread axis line connected to each other should be parallel and centered, and should not be forcibly connected.

2) After the pipeline is connected to the pump, welding and gas cutting should not be carried out on it, when welding or gas cutting is required, the pipeline should be removed or necessary measures should be taken to prevent welding slag from entering the pump and damaging the parts of the pump.

3) The configuration of the pipeline should be rechecked according to the equipment data and design drawings.

4) Each pump outlet pipe should be equipped with valves, check valves and pressure gauges; When the pump draws water directly from the outdoor water supply network, valves, check valves and pressure gauges should be installed on the suction pipe, and a bypass pipe with valves should be set around the pump.

Vibration isolation and noise prevention measures:

Flexible rubber joints or metal joints of corrugated pipes should be installed on the inlet and outlet pipes of vertical acid-alkali resistant sewage pumps; Elastic hangers and elastic brackets should be used for pipeline supports; In order to create a good vibration isolation effect, the foundation vibration isolation, pipeline vibration isolation and bracket vibration isolation are complete, and the area, number of layers, number and model of vibration isolation pad (shock absorber) and the model and quantity of flexible joints are selected and installed according to the calculation results. The model, positioning size, number of options and other parameters of the shock absorber are directly related to the stability and damping effect of the pump, and the determination of the parameters is confirmed by the accurate accounting of technical personnel. Where the water pump is pressed out of the pipe through the wall and floor, measures should be taken to prevent solid sound transmission.

1. When purchasing a vertical acid and alkali resistant sewage pump, you should pay attention to its model, flow rate and head. If the selected specifications are not appropriate, it will not be able to obtain sufficient water output and the efficiency of the unit will not be brought into play. In addition, the direction of rotation of the motor should also be clarified, some types of vertical acid and alkali resistant sewage pumps can produce water when they rotate forward and in reverse, but the water output is small and the current is large when reversing, and its reversal will damage the motor winding.

In order to prevent the vertical acid and alkali resistant sewage pump from leaking electricity and causing electric shock accidents when working underwater, a leakage protection switch should be installed.

2. When installing the vertical acid and alkali resistant sewage pump, the cable should be overhead, and the power cord should not be too long. Do not stress the cable when the unit is launched, so as not to cause the power cord to break. The national treasure vertical acid and alkali resistant sewage pump should not sink into the mud, otherwise it will cause poor heat dissipation and burn out the motor winding.

3. Try to avoid turning on the machine at low pressure. lianxi400 030 1558 power supply voltage and rated voltage can not differ by 10%, the voltage is too high will cause the motor to overheat and burn out the winding, the voltage is too low the motor speed decreases, if it does not reach 70% of the rated speed, the starting centrifugal switch will be closed, resulting in the start winding group time energized and heating and even burning out the winding and capacitor. Do not switch the motor on and off frequently, because the electric pump will produce backflow when it stops, and if it is turned on immediately, the motor will be loaded and started, resulting in excessive starting current and burning out the windings.

Fourth, do not let the vertical acid and alkali resistant sewage pump overload operation for a long time, do not pump water with large sand content, the vertical acid and alkali resistant sewage pump dehydration operation time should not be too long, so as not to overheat the motor and burn. During the operation of the unit, the operator must observe whether the working voltage and current are within the specified value on the nameplate at any time, and if it does not meet the requirements, the motor should be stopped to find out the cause and eliminate the fault.

5. Check the motor more often, if it is found that the lower cover is cracked, the rubber sealing ring is damaged or invalid, etc., it should be replaced or repaired in time to prevent waterproof penetration into the machine.

Put something like a damping pad under the pump, try to use a soft connection for the connecting pipeline, and try not to add the mass of the pump to the pump body if you are a submersible pump.

Installation requirements for vibration isolation of water pump pipes in building water supply and drainage design:

1. The pipeline installation should be carried out 24 hours after the installation of the vibration isolation element of the pump unit.

2. The flexible rubber joint installed on the inlet and outlet pipes of the water pump must be on the side of the valve and check valve near the water pump.

3. Flexible rubber pipe fittings should be installed on horizontal pipes.

4. Flexible rubber pipe fittings should be installed in a natural state without force, and it is strictly forbidden to be in the state of extreme deviation. The pipes connected with flexible rubber pipe fittings should be fixed on brackets, hangers, brackets or anchors.

5. Flexible rubber pipe fittings can be installed openly or concealed. When used for buried pipelines, it should be located in pipe trenches or inspection wells.

6. Single-sphere and double-sphere flexible rubber joints can be installed on the suction pipe of the water pump.

7. When the special flange of the flexible rubber pipe fittings connected by the flange is connected with the ordinary flange, the screw rod of the bolt should be facing the side of the ordinary flange. The bolts on each end face should be symmetrically tightened gradually and evenly, and the tightness and degree of all bolts should be consistent.

8. When the flexible rubber pipe fittings connected by the flange are installed in series, a flat welded steel flange and flange for connection should be added in the middle of the loose flange of the two flexible rubber pipe fittings.

9. When the compression or elongation displacement of the flexible rubber pipe fitting is controlled, a limit control rod should be set between the two flanges of the flexible rubber pipe fitting.

10. Flexible rubber pipe fittings should be kept clean and dry, avoiding direct sunlight and rain and snow soaking.

11. Flexible rubber pipe fittings should avoid contact with acids and alkalis, oils and organic solvents.

12. The distance between ordinary flexible rubber pipe fittings and open flame and high temperature heat source should be 1m away.

13. It is strictly forbidden to paint outside the flexible rubber pipe fittings.

According to the design code for water supply and drainage of buildings.

Zhigb50015-2003, stipulate:

The water supply pump room in the DAO building should adopt the following series of vibration reduction and noise prevention measures:

1. Low-noise water pump unit should be selected;

2. A reduction device should be set on the suction pipe and outlet pipe;

3. The foundation of the pump unit should be equipped with a vibration damping device;

4. Pipe supports, hangers and pipes through walls and floors should take measures to prevent solid sound transmission;

5. If necessary, the walls and ceilings of the pump room should be soundproofed and absorbed.

The sewage pumps used in the building include acid and alkali resistant submersible sewage pumps, acid and alkali resistant submerged drainage pumps, acid and alkali resistant vertical sewage pumps and acid and alkali resistant horizontal sewage pumps. However, acid-alkali resistant vertical sewage pumps and acid-alkali resistant horizontal sewage pumps require seismic isolation foundations, which occupy a certain amount of site space, so they are rarely used in buildings. (Beauty) (treasure).

In the building, if the site is small and the drainage volume is not large, the acid and alkali resistant submersible sewage pump and acid and alkali resistant submerged sewage pump can be preferred. Among them, the acid and alkali resistant submerged sewage pump can generally be used in more important places, and its overall structure is compact, small in size, low in noise, easy to move, and simple to install. The energy-saving effect is remarkable, the maintenance is convenient, there is no need to build a pump room, and it can be submerged in the water, which greatly reduces the project cost.

A standby water pump should be set up in public building facilities according to each drainage collection tank as a unit, and it should be operated interactively at ordinary times to reduce the long-term load operation of the pump and improve the service life.