Summary of the invention:
The purpose of this utility model is a kind of totally-closed and energy-saving pumping plant that has used pipe network pressure-superposed principle to solve the problems referred to above.
To achieve these goals, the technical solution of the utility model is as follows: a kind of totally-closed and energy-saving pumping plant, comprise the pump water inlet pipe, water pump outlet pipe, be provided with booster pump between pump water inlet pipe and the water pump outlet pipe, also be provided with bypass pipe between pump water inlet pipe and the water pump outlet pipe, it is characterized in that this totally-closed and energy-saving pumping plant also is provided with water tank, water tank is communicated with the city planting ductwork water inlet pipe, water tank also is communicated with the pump water inlet pipe, the city planting ductwork water inlet pipe is communicated with no negative pressure surge tank, and no negative pressure surge tank is connected with the suction and discharge electromagnetic valve.At the city planting ductwork water inlet pipe with do not have and also be provided with backflow preventer between the negative pressure surge tank.
The principle of the utility model has used pipe network pressure-superposed (no negative pressure) supply equipment, directly be connected in series with the municipal tap water pipe network, do not have influence on peripheral user's water yet, made full use of the original pressure of tap water pipe network etc., and the tap water pipe network cut off the water or the situation of water for fire under, can from water tank, supply water automatically, not only not influence user's normal water, and more energy-conservation; Because this pumping plant adopts the food-grade stainless steel entirely, system can take out water in the water tank according to outside water situation Automatic Cycle again, thereby guarantees user's water quality situation, has also improved the reliability that supplies water.The utility model can be used for municipal network water supply is regularly cut off the water, the fluctuation of municipal network water supply water supply situation is excessive zone, other zone such as when existing public supply mains water supply total amount can not satisfy water demand.
The specific embodiment:
Below in conjunction with drawings and Examples the utility model is elaborated.
Totally-closed and energy-saving pumping plant shown in Fig. 1 and Fig. 2, comprise pump water inlet pipe 8, water pump outlet pipe 13, be provided with booster pump 10 between pump water inlet pipe 8 and the water pump outlet pipe 13, also be provided with bypass pipe 9 between pump water inlet pipe 8 and the water pump outlet pipe 13, it is characterized in that this totally-closed and energy-saving pumping plant also is provided with water tank 15, water tank 15 is communicated with city planting ductwork water inlet pipe 1, water tank 15 also is communicated with pump water inlet pipe 8, city planting ductwork water inlet pipe 1 is communicated with no negative pressure surge tank 2, no negative pressure surge tank 2 is connected with suction and discharge electromagnetic valve 3, and no negative pressure surge tank 2 is connected with pump water inlet pipe 8.At city planting ductwork water inlet pipe 1 with do not have and also be provided with backflow preventer 16 between the negative pressure surge tank 2.Be provided with first electromagnetic valve 6 in pump water inlet pipe 8 and no negative pressure surge tank 2 junctions, be provided with second electromagnetic valve 7 in pump water inlet pipe 8 and water tank 15 junctions.
High-floor feedwater carries out supercharging by booster pump 10, and water pump directly inserts city planting ductwork, and supply-water pump may produce vacuum when excessively drawing water, influence peripheral user's water.The purpose of this utility model is eliminated negative pressure exactly.
When the city planting ductwork inflow supplies water less than booster pump 10, water in the no negative pressure surge tank 2 water source as a supplement still can normal water supply, at this moment, suction and discharge electromagnetic valve 3 is opened under the instruction of intelligence control system automatically, thereby enter no negative pressure surge tank after making air by the air filter that polytetrafluoroethylene (PTFE) is housed, (the few more air of water is many more, the many more air of water are few more) eliminated negative pressure, Deng water use peak after the phase, when the city planting ductwork inflow supplies water greater than water pump, air in the no negative pressure surge tank 2 is got rid of from suction and discharge electromagnetic valve 3 automatically, from and can utilize the original pressure of municipal tap water pipe network, the water that the guarantees peripheral user fluctuation that is not stressed.
No negative pressure surge tank 2 is made by 304 food-grade stainless steels, and two ends are end socket, and the centre is cylindrical welding steel body, adopts argon arc welding.Can make operate as normal under 0.6 MPa test pressure with reference to JB2880.This no negative pressure surge tank 2 can be horizontal or vertical, and its leg, a tube setting should meet the JB1166 regulation.
The main effect of backflow preventer 16 is to avoid backflow pollution; Satisfy the regulation of GB50015-2003 " Code for design of building water supply and sewerage " national standard, before it supporting strainer should be installed, volume is little, in light weight.
Water pump outlet pipe 13 also is connected with voltage-stabilizing compensator 12, and voltage-stabilizing compensator 12 adopts auto-pneumatic cylinder, and the strict GB150 " GB150-1998 " that presses makes, and selects the natural rubber barrier diaphragm-type pressurized water tank for use, can not produce pollution to water quality.Auto-pneumatic cylinder carries out the hydrostatic test by the JB2880 requirement.This auto-pneumatic cylinder is installed in system delivery port place, is used to eliminate water hammer and micro-regulating pondage, mainly plays pressure stabilization function, the Fraquent start of protection system.As can be seen from Figure 3, this voltage-stabilizing compensator 12 comprises an auto-pneumatic cylinder 17, is provided with diaphragm of rubber 18 in this auto-pneumatic cylinder 17, and the upper end of this auto-pneumatic cylinder 17 is provided with qi of chong channel ascending adversely mouth 19, and the lower end of this auto-pneumatic cylinder 17 is provided with water in-out port 20.This diaphragm of rubber 18 adopts the food-grade capsule to make, and guarantees can not produce pollution to water quality.
Be divided into following situation during use:
1) network of rivers is supplied water normal: the pressure on the water inlet pipe 1 surpasses the setting pressure on the outlet pipe 13 at this moment, intelligence control system 14 stops frequency conversion booster pump 10 work, water by city planting ductwork water inlet pipe 1 through no negative pressure surge tank 2, pump water inlet pipe 8, directly enter outlet pipe 13 and supply water to the user by bypass pipe 9.
2) if when not having pressure in the negative pressure surge tank 2 and being lower than the setting pressure of water pump outlet pipe 13, intelligence control system 14 will start according to the setting pressure frequency control of water pump outlet pipe 13,10 pairs of water pressurizations of frequency conversion booster pump, to reach the setting pressure of water pump outlet pipe 13, this moment, pressure meter 4 detection signals fed back to intelligence control system 14, and regulated the elimination negative pressure automatically by suction and discharge electromagnetic valve 3.
When 3) surpassing the inflow (water inlet pipe 1) of tap water pipe network as if water demand amount water pump outlet pipe 13, when intelligence control system 14 detects city planting ductwork water inlet pipe 1 and is lower than the import setup pressure value (general 0.1 ~ 0.15MPa), automatically pump water inlet 8 and second electromagnetic valve 7 of water tank 15 junctions are opened, close first electromagnetic valve 6 of pump water inlet pipe 8 and no negative pressure surge tank 2 junctions simultaneously, at this moment booster pump 10 changes in water tank 15 and draws water, and has guaranteed so fully can not produce negative pressure to city planting ductwork; When cutting off the water, user's water that also can look oneself.
4) when night, water supply volume was very little, carry out voltage stabilizing by voltage-stabilizing compensator 12, the ordinary startup that this has been avoided water pump has prolonged application life of equipment.
5) in order to guarantee the quality of water in the water tank 15, the actual used water situation by 14 pairs of localities of intelligence control system is provided with, every day regularly with the water in the water tank 15 or when the peak period with the water in the water tank 15, assurance water quality is fresh.Also be provided with the automatic pollution discharge function simultaneously, regularly blowdown, thus not only improved the water quality situation, also guaranteed the reliability that supplies water.
Water tank is provided with float valve 5, is used for controlling the water level of water tank 15, suction and discharge electromagnetic valve 3, and intelligence control system 14 belongs to prior art, does not repeat them here.This water pump outlet pipe 13 also is provided with pressure sensor 11, is used for the hydraulic pressure of testing pump outlet pipe 13.No negative pressure snubber 2 also is provided with pressure meter 4, is used to detect the pressure in the no negative pressure snubber 2.