Pressure superposition water supply system for pressure-continuous type pipe network

Abstract

The invention discloses a durable-pressing pressure-superposed water supply system in pipe network, comprising inverter controller (7) and water supply circuit, characterized in that the water supply circuit is constituted by connecting the parallel circuit between the pressure-holding valve (4) and the remote pressure gauge (9) at the location of water outlet. The parallel circuit is constituted by booster loop and reserving by-pass. The booster loop comprises an inverter pump (8) or multiple parallel inverter pumps (8) and a diaphragm pressure jug (5) in series. There is an electromotive valve (12) in the reserving by-pass. In pressure-superposed water supply in pipe network, the invention controls the lowest pressure of municipal pipe network accurately. When the installing height of equipment is lower than the one of municipal pipe network, there is no influence to municipal pipe network and peripheral user. The secondary pollution of system generated by groundwater infiltration can also be avoided and multiple inverter pumps with different height are switched to decrease the energy saving.

Description

technical field [0001] The invention relates to a water supply system, in particular to a system which realizes superimposed pipe network water supply by starting and stopping water pumps. Background technique [0002] Traditional secondary water supply technologies are all equipped with water storage tanks. The existence of the storage pool not only easily leads to secondary pollution of water quality, but also makes the remaining water pressure of the municipal pipe network unusable, resulting in huge waste of energy. With the continuous advancement of science and technology, researchers have improved the traditional secondary water supply system into a non-negative pressure (pipe network superimposed pressure) water supply system by using voltage stabilizer balancer and frequency conversion technology. The system is mainly composed of a parallel connection of a branch circuit connected in series with a voltage stabilizer balancer installed with a negative pressure elimin...

AI Technical Summary

Problems solved by technology

Practice has proved that the system obviously has the following defects: 1. The start or stop of the frequency conversion pump is mainly controlled by the numerical control device. Direct water supply from the municipal pipe network; once the pressure of the municipal pipe network is lower than the pressure required by the user, the numerical control device will send a signal to cut off the direct water supply circuit and start the frequency conversion pump to pressurize the water supply

It can be seen that when the water supply of the municipal pipe network is less than the flow rate of the frequency conversion pump, the frequency conversion pump forcibly pumps water from the municipal pipe network, which will inevitably cause a significant drop in the pressure of the municipal pipe network, and the pressure required for normal water use by surrounding users cannot be guaranteed.

2. When the installation elevation of the pressure stabilizing balancer is lower than that of the municipal pipe network, when the pressure stabilizing balancer starts to eliminate the negative pressure, some pipe sections of the municipal pipe network are already in a state of negative pressure, and groundwater is easy to leak Point infiltration system causes secondary pollution

3. When using the same type of frequency conversion water pump, the pump must be selected according to the minimum pressure of the municipal pipe network. When the pressure of the municipal pipe network changes greatly and the pressure is high, the speed of the pump will exceed the lower limit of the effective speed regulation range, and the efficiency will be high. Amplitude drops, resulting in waste of electric energy

However, the equipment in this patent solution, especially when the installation position of the filter ballast is lower than the municipal pipe network, such as installed in the basement, when there is no negative pressure in the filter ballast but close to negative pressure, the municipal pipe network The pressure is already very low, and it will still affect other users around the water

In addition, in this patent solution, when the installation position of the filter ballast is lower than the municipal pipe network and the intake and exhaust valves are in the working state of preventing negative pressure from forming, the pipeline higher than the filter ballast in front of the filter ballast is already under negative pressure. If there is a leak in the pipeline, groundwater can easily seep into the system and cause secondary pollution

[0004] To sum up, the existing non-negative pressure (pipe network superimposed pressure) water supply system does not have the function of ensuring the minimum working pressure of the municipal pipe network, and the installation height of the system is obviously limited, neither can it be installed in places where the municipal water supply pressure cannot reach height, and cannot be installed underground

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