CN201809813U - Intelligent non-negative pressure domestic water supply system - Google Patents

Abstract

The utility model relates to a non-negative pressure intelligent water supply system for domestic water, which comprises at least two pressurizing devices with a water inlet and a water outlet and a frequency conversion automatic control device, wherein the water inlet of at least one pressurizing device is connected with the municipal water pipe network, and in addition The water inlet of at least one pressurizing device is connected to the water pipe network of the pool, and the water outlets of the pressurizing device are all connected to the domestic water outlet pipe network; Pressure device water supply pressure and flow. The utility model makes full use of the water supply energy of the municipal pipe network, adopts the frequency conversion automatic control device, saves the resources of the water supply equipment, and utilizes the frequency conversion technology to maximize the technical advantages of the submersible pump's flow rate and head adjustment range, which not only saves energy consumption, but also Water supply efficiency can be increased by 30%.

Description

A non-negative pressure intelligent water supply system for domestic water

technical field

The utility model relates to a water supply system, in particular to a non-negative pressure intelligent water supply system for domestic water.

Background technique

At present, the water supply method of general living quarters is to first store the municipal water supply in the pool, and then use the vertical multistage centrifugal pump to pump the water in the pool to the secondary pressurized water supply pipe network of the community. This way makes municipal water supply energy wasted and not effectively utilized. Moreover, the electrical control system for water supply in the existing living quarters adopts partition control, which divides the quarters into high, medium, and low water supply networks, and each water supply network area is individually designed and equipped with water supply equipment. Allocation, but only general and simple control, resulting in a waste of resources. In addition, during the construction of the living quarters, because most designers leave too much allowance for the selection of water pumps, it may cause the power of the pumps to be too large, resulting in a phenomenon of large flow and large power, which will make the power consumption of the pump room of the community Large, resulting in a great waste, at the same time, the designer in the selection of technical parameters of the head, mostly based on the working conditions of the pump when the power frequency is running, did not make full use of the advantages of frequency conversion technology, resulting in low water supply efficiency.

Utility model content

Aiming at the deficiencies of the above technologies, the technical problem to be solved by the utility model is to provide a domestic water non-negative pressure intelligent water supply system that fully utilizes the water supply energy of the municipal pipe network and adopts intelligent control technology.

The utility model is achieved in the following way: a domestic water non-negative pressure intelligent water supply system includes at least two pressure devices with water inlets and water outlets and a frequency conversion automatic control device, wherein the water inlet of at least one pressure device and the municipal water pipe In addition, the water inlet of at least one pressurizing device is connected with the water pipe network of the pool, and the water outlets of the pressurizing device are all connected with the domestic water outlet pipe network; Feedback automatically controls the water supply pressure and flow of the pressurizing device.

The utility model also has the following additional technical features:

The pressurizing device includes a tank body with the water outlet at the upper end and the water inlet at the lower end, and a motor-driven pump that is set in the tank and pressurizes the water flowing in from the water inlet and pumps it out from the water outlet. a submersible pump; a water level probe is provided in the tank, a water supply detection device is provided on the municipal water pipe network, and a water pressure detection device is provided on the domestic water outlet pipe network; the power cable of the frequency conversion automatic control device and the motor The cables are connected, and the control cables are respectively connected with the water level probe, the water supply detection device and the water pressure detection device.

The domestic water outlet pipe network includes water supply networks in high, middle and low areas, and pressure reducing devices are installed on the water supply networks in the middle and low areas; The electrical contact tables on the network correspond to the electric butterfly valves respectively arranged on the water supply network in the middle and low areas, and the electric connection table and the electric butterfly valves are connected to the frequency conversion automatic control device through the control cable.

The water supply detection device includes another electric connection point meter and another electric butterfly valve arranged on the municipal water pipe network, and the other electric connection meter and the other electric butterfly valve are both connected to the frequency conversion automatic control device through the control cable.

The decompression device is a decompression valve.

The lower end of the tank body is provided with the motor, the upper end is sealed by a flange, and the water outlet is opened on the flange.

The upper middle part of the side wall of the tank has an opening for the motor cable and the water level probe cable to protrude from.

Compared with the prior art, a domestic water non-negative pressure intelligent water supply system provided by the utility model has the following advantages: the utility model includes at least two pressurizing devices and a frequency conversion automatic control device, wherein the water inlet of at least one pressurizing device is connected to the The municipal water pipe network is connected, and the water inlet of at least one pressurizing device is connected with the pool water pipe network, and the water outlets of the pressurizing device are all connected with the domestic water outlet pipe network; the frequency conversion automatic control device supplies water to the domestic water outlet pipe network. The feedback of the signal automatically controls the water supply pressure and flow of the pressurizing device. First of all, the water supply system of the utility model makes full use of the water supply energy of the municipal pipe network, so that the municipal water pressure is superimposed on the pressurizing device and then sent to the community, saving water supply energy; secondly, the water supply system adopts a frequency conversion automatic control device, which uses PID technology The entire water supply system is controlled to greatly save water supply equipment resources; finally, the utility model utilizes the advantages of frequency conversion technology to maximize the technical advantages of the submersible pump's flow rate and head adjustment range, which not only saves energy consumption, but also improves water supply efficiency. 30% improvement.

Description of drawings

Fig. 1 is a structural block diagram of a preferred mode of the utility model;

Fig. 2 is a structural schematic diagram of the pressurizing device in the utility model.

Detailed ways

Referring to Fig. 1 to Fig. 2, a preferred mode of a non-negative pressure intelligent water supply system for domestic water of the present invention is shown, which includes at least two pressurizing devices 1 with water inlets and water outlets and a frequency conversion automatic control device 2, The water inlet of at least one pressurizing device is communicated with the municipal water pipe network 3, and the water inlet of at least one pressurizing device is communicated with the pool water pipe network 4, and the water outlets of the pressurizing device are all communicated with the domestic water outlet pipe network; The frequency conversion automatic control device automatically controls the water supply pressure and flow rate of the pressurizing device through the feedback of the water supply signal of the domestic water outlet pipe network. The municipal water pipe network 3 of the utility model is provided with a water supply detection device, which is used to detect the municipal water supply pressure, and the frequency conversion automatic control device controls whether the pressurization device uses municipal water or pool water for water supply through the feedback of the municipal water supply pressure signal; the water supply detection The device includes another electrical connection point meter 24 and another electric butterfly valve 25, the municipal water is connected to the water inlet of the pressurization device through the other electric butterfly valve, and the other electric contact meter is provided in front of the other electric butterfly valve, which is used to It is used to detect the municipal water pressure; during the implementation process, the water in the pool is connected to the water inlet of the pressurization device through a manual butterfly valve and a check valve. The function of the check valve is to prevent the municipal water from flowing back into the pool.

In this embodiment, the pressurizing device 1 includes a tank body 11 with the water outlet at the upper end and the water inlet at the lower end, and the water that flows in from the water inlet is pressurized after being arranged in the tank body. The submersible pump 13 driven by the motor 12 is pumped out of the water outlet; a water level probe 21 is provided in the tank body, and the water level probe is used to detect the water level of the tank body, so as to prevent the submersible pump from being burned due to no water idling; Equipped with a water pressure detection device, the water pressure detection device is used to detect the pressure of the domestic water outlet system. The frequency conversion automatic control device can prevent the water pipe from bursting due to high pressure or due to pressure Low and insufficient water supply. The domestic water outlet pipe network includes a high area water supply network 51, a middle area water supply network 52 and a low area water supply network 53, and the middle and low area water supply networks are all equipped with a pressure reducing device, and the pressure reducing device is a pressure reducing valve 54. The water pressure detection device includes electric contact meters 22 corresponding to the water supply networks in the high, middle and low areas and electric butterfly valves 23 respectively corresponding to the water supply networks in the middle and low areas. The power cable of the frequency conversion automatic control device It is connected with the motor cable, and the control cable is respectively connected with the electric contact meter, another electric contact meter, an electric butterfly valve, and another electric butterfly valve. The frequency conversion automatic control device is an existing equipment, which generally includes a controller and a frequency converter. During the implementation process, each electric contact meter and electric butterfly valve feed back the pressure signal of the domestic water outlet of the community to the controller, and compare with the given pressure signal of the controller. For comparison, the negative feedback method is used to perform PID control calculations, and the controller sends the calculation results to the frequency converter with 0-10V DC voltage or 4-20mA DC current signals, and the frequency converter outputs signals in the range of 0-50Hz to the submersible pump, so that The submersible pump pumps water to meet the water supply requirements of the community with constant pressure and variable flow.

In this embodiment, the lower end of the tank body 11 is provided with the motor 12, and the upper end is sealed by a flange 14. The water outlet is provided on the flange, and an exhaust valve is also arranged on the flange. It is equipped with a sealing flange, and the middle is sealed with a rubber strip, which is used for water sealing in the tank. The upper middle part of the side wall of the tank has an opening 15 for the motor cable and the water level probe cable to protrude from. The utility model makes full use of the water supply energy of the municipal pipe network, adopts the frequency conversion automatic control device, saves the resources of the water supply equipment, and utilizes the frequency conversion technology to maximize the technical advantages of the submersible pump's flow rate and head adjustment range, which not only saves energy consumption, but also Water supply efficiency can be increased by 30%.

The above-mentioned embodiments are only for the purpose of illustrating the utility model, rather than limiting the utility model. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the utility model. Therefore all equivalent technical solutions should also belong to the category of the utility model, and the patent protection scope of the utility model should be defined by each claim.

Claims (7)

1. a life water does not have the negative pressure intelligent water supply system, it is characterized in that: comprise at least two water booster systems (1) and a frequency conversion self-con-tained unit (2) with water inlet and delivery port, wherein the water inlet of at least one water booster system is communicated with municipal grid (3), the water inlet of at least one water booster system is communicated with tank water pipe network (4) in addition, and the delivery port of described water booster system all is communicated with life water water outlet pipe network; Described frequency conversion self-con-tained unit is by controlling the pressure of supply water and the flow of water booster system automatically to the feedback of life water water outlet pipe network water supply signal.

2. a kind of life water according to claim 1 does not have the negative pressure intelligent water supply system, it is characterized in that: be provided with described delivery port and lower end on described water booster system (1) comprises and establish the tank body (11) of described water inlet and be arranged in this tank body and the submersible pump (13) by motor (12) driving that will be pumped by delivery port from the water pressurization back that water inlet flows to; Be provided with water-level probe (21) in the described tank body, described municipal grid is provided with the water supply checkout gear, and described life water outlet pipe is provided with device for detecting water pressure on the net; The power cable of described frequency conversion self-con-tained unit is connected with described motor cable, and control cables is connected with device for detecting water pressure with water-level probe, water supply checkout gear respectively.

3. a kind of life water according to claim 2 does not have the negative pressure intelligent water supply system, it is characterized in that: described life water water outlet pipe network comprises high, medium and low district water supply network (51,52,53), described in, be equipped with decompressor on low district's water supply network (52,53); Described device for detecting water pressure comprises in the corresponding respectively electric contact table (22) and corresponding respectively being arranged on that is arranged on the high, medium and low district water supply network, the electric butterfly valve (23) on the low district water supply network, and described electrical connection table all is connected with the frequency conversion self-con-tained unit by described control cables with electric butterfly valve.

4. a kind of life water according to claim 2 does not have the negative pressure intelligent water supply system, it is characterized in that: described water supply checkout gear comprises another electric connection point table (24) and another electric butterfly valve (25) that is arranged on the municipal grid, and described another is electrically connected table and all is connected with the frequency conversion self-con-tained unit by described control cables with another electric butterfly valve.

5. a kind of life water according to claim 3 does not have the negative pressure intelligent water supply system, it is characterized in that: described decompressor is reducing valve (54).

6. a kind of life water according to claim 2 does not have the negative pressure intelligent water supply system, it is characterized in that: described tank body (11) lower end is provided with described motor (12), and described delivery port has been opened by flange (14) sealing in the upper end on the flange.

7. a kind of life water according to claim 2 does not have the negative pressure intelligent water supply system, it is characterized in that: the opening (15) that supplies described motor cable and water-level probe cable to stretch out is opened in described tank body (11) sidewall middle and upper part.

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