CN201395812Y - A pressurized and steady flow water supply system - Google Patents

Abstract

The utility model discloses a pressure boost steady flow water supply system, which is composed of a buffer steady flow compensator and a constant pressure variable frequency deep well pump which are connected in parallel; the buffer steady flow compensator is internally provided with a liquid level measuring device and a pressure measuring device, the buffer steady flow compensator is provided with a water inlet pipe, a water outlet pipe and a water drain valve, and the top of the buffer steady flow compensator is provided with an air compensating valve, an exhaust valve and a safety valve; a pressure pump is arranged on the water outlet pipe, and the water outlet pipe of the pressure pump is connected with the water outlet pipe of the constant-pressure variable-frequency deep-well pump in parallel to form a water supply main pipe; and a liquid level measuring device, a pressure measuring device, a safety valve, a drain valve, a pressurizing pump and a constant-pressure variable-frequency deep-well pump of the buffer steady-flow compensator are electrically connected with the PLC centralized controller. The water supply system fully utilizes water pressure, only supplements pressure for the pressure difference between the incoming water pressure and the pressure required by a water user, and can save electricity by 30 percent compared with the traditional mode of pressure relief and complete pressurization for incoming water. And has the corresponding beneficial effects of small investment, simple and convenient construction and the like.

Description

A pressurized and steady flow water supply system

technical field

The utility model relates to a water supply system, in particular to a pressurized and steady flow water supply system.

Background technique

At present, the groundwater level in the city is getting lower and lower. Therefore, a lot of industrial water has to be supplied through the reservoir. Since the water from the reservoir is generally constant pressure and quantitative water supply, the water consumption is not constant according to the production situation. Therefore, in the prior art, it is generally to build a reservoir to store water, and then pressurize water supply according to the demand of the water side to meet the needs of use. Although this water supply method can realize constant pressure and variable water supply, due to the need to build a reservoir and a pump station, it not only occupies a large area, is difficult to construct, takes a long period, and requires a large investment. Drip, leak, and seepage, which will lead to ineffective water loss, and energy waste due to the ineffective use of water pressure from the reservoir.

Utility model content

The purpose of the utility model is to provide a pressurized and steady-flow water supply system with small footprint, quick and convenient installation, short construction period, water saving and energy saving.

The utility model is realized in the following way: the pressurized steady flow water supply system is composed of a parallel buffer steady flow compensator and a constant pressure variable frequency conversion deep well pump; the buffer steady flow compensator is equipped with a liquid level measuring device and a pressure measuring device, buffer The steady flow compensator is equipped with water inlet pipe, water outlet pipe and drain valve, and air supply valve, exhaust valve and safety valve are arranged on the top; The outlet pipes of the variable frequency deep well pump are connected in parallel to form the main water supply pipe; the liquid level measuring device, pressure measuring device, safety valve, drain valve and booster pump of the buffer and steady flow compensator, and the constant pressure variable frequency deep well pump and the PLC centralized controller circuit connect.

The pressurized and stabilized flow water supply system of the utility model is composed of a parallel buffer and stabilized flow compensator and a constant pressure variable frequency conversion deep well pump. The external constant pressure and constant amount of incoming water enters the buffer and stabilized flow compensator, and the outlet water is boosted by the booster pump. Finally, a constant water supply with the pressure required by the water side is obtained. The adjustment of the water outlet pressure of the booster pump is controlled by the PLC centralized controller according to the water requirements of the water side. The water supply pipe of the frequency conversion deep well pump and the variable pressure constant water supply pipe provided by the aforementioned booster pump are connected in parallel to form a water supply main pipe. The deep well pump is a variable frequency pump with constant pressure and variable frequency. According to the trend of the pressure change of the water supply main pipe caused by the change of the water consumption of the water supply, the PLC centralized controller can adjust the motor frequency of the deep well pump, thereby adjusting the water supply of the variable frequency deep well pump. . After this part of the constant-pressure variable water supply is mixed with the controllable-pressure constant-volume incoming water pressurized by the booster pump, the constant-pressure variable water supply suitable for the water user's needs can be provided according to the water consumption change of the water user. The water supply system makes full use of the incoming water pressure, and only supplements the pressure difference between the incoming water pressure and the pressure required by the water side. Therefore, compared with the traditional method of releasing the incoming water pressure and then fully pressurizing it, it can save 30% of electricity . Moreover, since the construction of the water storage tank and the pumping station is omitted, the utility model has the corresponding beneficial effects of small investment and convenient construction.

Since the booster pump uses a frequency converter to control the water supply of the water pump, the flow rate of the booster pump is guaranteed to be a constant value, so the pressure in the water supply pipeline of the reservoir will not fluctuate due to the change of water consumption in the plant area, which will cause damage to the water supply pipeline, thus It can effectively guarantee the safety of water pipelines and systems.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, the pressurized and steady-flow water supply system consists of a parallel buffer and steady-flow compensator 5 and a constant-pressure variable-frequency variable-frequency deep well pump 2. The compensator belongs to the pressure vessel and is equipped with a liquid level gauge 4 and an on-site pressure gauge 8 . The compensator 5 is provided with a water inlet pipe 12, a water outlet pipe 13 and a drain valve 10, and an air supply valve 6, an exhaust valve 7 and a safety valve 9 are arranged on the top of the compensator.

According to the number of incoming water pipes, there can be one buffer and steady flow compensator 5, or two or more can be arranged in parallel at the same time. In this embodiment, two buffer and steady flow compensators are arranged in parallel. The incoming water from the reservoir transported by the two pipelines is input into the buffering and steady flow compensator 5 through the water inlet pipe 12 respectively. A booster pump 3 is provided on the water outlet pipe 13, and the water supply at the pressure required by the water side can be obtained by adjusting the booster pump. The water level gauge 4, on-site pressure gauge 8, safety valve 9, drain valve 10, pressure pump 3 and constant pressure variable frequency deep well pump 2 of the buffer and steady flow compensator 5 are electrically connected to the PLC centralized controller 1. The water level in the compensator 5 is preset with a minimum working water level, a maximum water level and a minimum water level. When the water level reaches each limit value, the system sends out an alarm signal, and at the same time, when the water level reaches the lowest water level, the PLC centralized controller 1 controls the chain stop pump.

When the pressure in the compensator 5 is lower than the incoming water pressure and the pressure difference exceeds a preset value, the air supply valve 6 is opened to supply air to the compensator 5 . When the pressure in the compensator is equal to the water pressure, close the air supply valve and stop the air supply. When the pressure in the compensator 5 is greater than the incoming water pressure, the safety valve 9 is opened to reduce the pressure in the compensator. When the pressure in the compensator is greater than the incoming water pressure and the pressure difference exceeds a preset value, the exhaust valve 7 is opened to exhaust. After the safety valve is opened, when the water level in the tank rises to a certain set value higher than the maximum water level, the drain valve 10 on the compensator 5 is opened to discharge water, and the valve is closed after the water level drops to a certain degree.

In order to ensure the safety of the incoming water pipeline, a better implementation is to install a pressure-maintaining pressure relief valve 11 on the incoming water pipeline connected to the water inlet of the buffer and steady flow compensator. When the incoming water pressure exceeds the preset value , the pressure-sustaining pressure relief valve 11 is opened to discharge the water and release the pressure.

The entire system of the utility model is controlled by PLC centralized control, and all operating water volume, water pressure, water temperature and liquid level can be displayed centrally, and various interlocks are automatically controlled by PLC, and an alarm is set for liquid level and high pressure.

Claims (2)

1. A pressurized and steady flow water supply system, characterized in that the system is composed of a parallel buffer and steady flow compensator (5) and a constant pressure variable frequency variable frequency deep well pump (2); the buffer and steady flow compensator (5) is equipped with There is a liquid level measuring device (4) and a pressure measuring device (8), and the buffer steady flow compensator (5) is provided with a water inlet pipe (12), an outlet pipe (13) and a drain valve (10), and a supplementary valve (10) is provided on the top An air valve (6), an exhaust valve (7) and a safety valve (9); a booster pump (3) is provided on the outlet pipe (13), and the outlet pipe of the booster pump is connected to the outlet pipe of the constant-pressure variable-frequency deep well pump Connected in parallel to form the main water supply pipe (14); the liquid level measuring device (4) of the buffer and steady flow compensator (5), the pressure measuring device (8), the safety valve (9), the drain valve (10) and the booster pump (3) is electrically connected with the constant pressure variable frequency variable frequency deep well pump (2) and the PLC centralized controller (1). 2. The pressurized and steady flow water supply system according to claim 1, characterized in that a pressure maintaining pressure relief valve (11) is installed on the incoming water pipeline connected to the water inlet of the buffer and steady flow compensator.

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