CN204983032U - No negative pressure stationary flow water supply equipment with low discharge pressurize function - Google Patents

Abstract

The utility model discloses a non-negative-pressure steady-flow water supply device with the function of maintaining pressure with small flow, which is characterized in that it comprises a steady-flow tank, n water pumps, n frequency converters, a first pressure sensor, a pressure compensation tank, a second 2. Pressure sensor and controller; there is a partition in the steady flow tank, and the partition divides the steady flow tank into two parts: the steady flow chamber and the small flow pressure holding chamber; the partition between the steady flow chamber and the small flow pressure holding chamber The first electrically controllable valve is provided; the upper part of the steady flow chamber is provided with a water inlet, and the lower part is provided with a water outlet; the utility model divides the steady flow tank into a double chamber integrated structure of a steady flow chamber and a small flow pressure maintaining chamber, and has a compact structure , On-site installation is convenient and stable, and the diaphragm installed in the small flow pressure holding chamber is easy to disassemble and replace, and the energy saving performance of small flow water supply is good. At the same time, it has the function of non-negative pressure steady flow water supply, and its small footprint is automatic High degree, complete protection functions.

Description

Non-negative pressure steady flow water supply equipment with small flow pressure maintaining function

technical field

The utility model relates to the technical field of water supply equipment, in particular to a non-negative pressure stable flow water supply equipment with a small flow pressure maintaining function.

Background technique

In the process of daily water use in various buildings, production and domestic water use in various industrial and mining enterprises, the phenomenon that water pressure decreases often occurs when water consumption increases. Although there are many types of water supply equipment used in existing regional water supply, but The water pressure of the existing water supply equipment is negatively correlated with the amount of water used. When the amount of water used is large and the flow rate is large, the water pressure will decrease accordingly. For example, users in high-rise residential areas often experience low water pressure in high-rise residents during peak water usage hours at noon and evening. In severe cases, the water output is very small and affects normal water use. Sudden increase, sometimes causing damage to the pipe network. The pipe network stacking can be directly connected in series to the urban tap water pipe network for water supply. It is a new type of secondary water supply technology. Its main advantages are energy saving, sanitation, and small footprint. It has been used in the secondary water supply field of many industrial and civil buildings. used and achieved good results. However, due to the characteristics of large changes in water consumption and uneven water consumption in the secondary water supply, and the situation of low flow or zero flow often occurs for a long time, such as in the early hours of the morning, in order to maintain the pressure of the pipe network, the water pump still needs to run and consume Energy, there is no energy saving phenomenon. Therefore, the pipe network superimposed water supply equipment that appears on the market often installs a pneumatic water tank vertically on the water outlet main pipe of the water pump. Constantly affected by the water supply compression of the pump and the expansion of the pump, it is easy to cause instability and vibration to the outlet main pipe. Moreover, the air pressure water tank is not suitable for on-site installation and layout, and there are also problems such as pressure resistance, anti-corrosion, and corrosion.

Utility model content

The purpose of the utility model is to provide a non-negative pressure stable flow water supply device which does not need a separate air pressure water tank and can achieve the effect of small flow water supply and energy saving.

In order to solve the above technical problems, the technical scheme of the utility model is as follows: the non-negative pressure steady flow water supply equipment with small flow pressure maintaining function, including steady flow tank, n water pumps, n frequency converters, first pressure sensor, pressure compensation tank, second pressure sensor, controller;

There is a partition in the steady flow tank, and the partition divides the steady flow tank into two parts: a steady flow chamber and a small flow pressure holding chamber;

A first electrically controllable valve is arranged on the partition between the steady-flow chamber and the small-flow pressure-holding chamber;

The upper part of the steady flow chamber is provided with a water inlet, and the lower part is provided with a water outlet;

The water inlets of the n water pumps are connected to the water outlets of the steady flow chamber, and the water outlets of the n water pumps are connected to the water outlet pipes of the water supply equipment;

The outlet pipe of the water supply equipment is provided with a first pressure sensor, a pressure compensation tank, and a second pressure sensor, and the pressure compensation tank is located between the first pressure sensor and the second pressure sensor;

The signal output ends of the first pressure sensor and the second pressure sensor are connected to the IO port of the controller;

The IO port of the controller is connected to the pressure control port of the pressure compensation tank;

The controller controls the speed of the i-th water pump through the i-th frequency converter, 1≤i≤n;

The outlet of the water outlet pipe of the water supply equipment is connected to the inside of the small flow pressure holding chamber through the pipe;

A second electrically controllable valve is set on the pipeline between the outlet of the water outlet pipeline of the water supply equipment and the small flow pressure holding chamber;

The controller controls the opening and closing of the first electrically controllable valve and the second electrically controllable valve.

Further, the controller is realized by S7-200PLC.

Further, the output ends of the water pumps are all provided with flow sensors, and the signals collected by the flow sensors are input to the controller.

Compared with the existing technical solutions, the utility model has the beneficial effects: the utility model divides the steady flow tank into a double cavity integrated structure of a steady flow cavity and a small flow pressure holding cavity, and has the advantages of compact structure, convenient on-site installation and good stability. Advantages, and the diaphragm installed in the small-flow pressure-holding chamber is easy to disassemble and replace. The energy-saving performance of small-flow water supply is good. At the same time, it has the function of non-negative pressure steady-flow water supply.

Description of drawings

Fig. 1 is a schematic diagram of the utility model principle;

detailed description

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

Non-negative pressure steady flow water supply equipment with small flow pressure maintaining function, including steady flow tank, 10 water pumps, 10 frequency converters, first pressure sensor, pressure compensation tank, second pressure sensor, controller;

There is a partition in the steady flow tank, and the partition divides the steady flow tank into two parts: a steady flow chamber and a small flow pressure holding chamber;

A first electrically controllable valve is arranged on the partition between the steady-flow chamber and the small-flow pressure-holding chamber;

The upper part of the steady flow chamber is provided with a water inlet, and the lower part is provided with a water outlet;

The water inlets of 10 water pumps are connected to the water outlets of the steady flow chamber, and the water outlets of 10 water pumps are connected to the water outlet pipes of the water supply equipment;

The outlet pipe of the water supply equipment is provided with a first pressure sensor, a pressure compensation tank, and a second pressure sensor, and the pressure compensation tank is located between the first pressure sensor and the second pressure sensor;

The signal output ends of the first pressure sensor and the second pressure sensor are connected to the IO port of the controller;

The IO port of the controller is connected to the pressure control port of the pressure compensation tank;

The controller controls the speed of the i-th water pump through the i-th frequency converter, 1≤i≤10;

The outlet of the water outlet pipe of the water supply equipment is connected to the inside of the small flow pressure holding chamber through the pipe;

A second electrically controllable valve is set on the pipeline between the outlet of the water outlet pipeline of the water supply equipment and the small flow pressure holding chamber;

The controller controls the opening and closing of the first electrically controllable valve and the second electrically controllable valve.

Among them, the controller is realized by S7-200PLC, and the output terminals of the water pumps are equipped with flow sensors, and the signals collected by the flow sensors are input to the controller.

The working principle of the utility model: according to the first pressure sensor, the current normal water outlet pressure is known, and then according to the target water outlet pressure, the pressure to be compensated by the pressure compensation tank is obtained, the controller controls the pressure compensation tank to perform pressure compensation, and the second pressure sensor can Real-time judge whether the pressure compensated by the pressure compensation tank is correct; the controller controls each pump through each frequency converter, and truly realizes the precise control of water output, instead of the traditional controller just controlling the on and off of the water pump. The utility model divides the steady flow tank into a double chamber integrated structure of a steady flow chamber and a small flow pressure holding chamber, and supplies water to the small flow pressure holding chamber through the outlet of the water outlet pipe of the water supply equipment, and the small flow pressure holding chamber supplies water to the steady flow chamber , forming a closed-loop control, realizing the function of small flow pressure maintaining control.

Claims (3)

1. there is the non-negative pressure stabilized supply equipment of small flow pressure maintaining function, it is characterized in that, comprise steady-flow tank, a n water pump, a n frequency converter, the first pressure sensor, pressure compensation tank, the second pressure sensor, controller;

Be provided with dividing plate in steady-flow tank, steady-flow tank is divided into current stabilization chamber and small flow pressure maintaining chamber two parts by dividing plate;

Dividing plate between current stabilization chamber and small flow pressure maintaining chamber being provided with first can electric control valve;

Top, current stabilization chamber is provided with water inlet, and bottom is provided with delivery port;

The water inlet of n water pump connects the delivery port in current stabilization chamber, and the delivery port of n water pump connects the outlet conduit of supply equipment;

The outlet conduit of supply equipment is provided with the first pressure sensor, pressure compensation tank, the second pressure sensor, pressure compensation tank is between the first pressure sensor and the second pressure sensor;

First pressure sensor, the signal output part of the second pressure sensor are connected with the I/O port of controller;

The I/O port of controller is connected with the Stress control end of pressure compensation tank;

Controller passes through the rotating speed of i-th Frequency Converter Control, i-th water pump, 1≤i≤n;

The outlet of the outlet conduit of supply equipment is connected to inside, small flow pressure maintaining chamber by pipeline;

Pipeline between the outlet of the outlet conduit of supply equipment and small flow pressure maintaining chamber being arranged second can electric control valve;

Controller control first can electric control valve and second can the Push And Release of electric control valve.

2. the non-negative pressure stabilized supply equipment with small flow pressure maintaining function according to claim 1, is characterized in that, described controller adopts S7-200PLC to realize.

3. the non-negative pressure stabilized supply equipment with small flow pressure maintaining function according to claim 1, is characterized in that, described water delivery side of pump is provided with flow transmitter, and the signal of flow transmitter collection is input to controller.