A municipal pipe network and low-position water tank connected elastic user pipe network water supply system

Abstract

A kind of municipal pipe network and low water tank and connect elastic user pipe network water supply system, comprising: municipal pipe network, low area user pipe network, bottom water tank, variable frequency pump group, elastic user pipe network, high area user pipe network;Elastic user pipe network is arranged between low water pressure line and high water pressure line;Elastic user pipe network is equipped with and is connected into the inlet water of the elastic user pipe network horizontal elastic pipe section, longitudinal elastic pipe section;Horizontal elastic pipe section, along the direction of water flow, therefore, is equipped with solenoid valve, pressure reducing valve, check valve;Longitudinal elastic pipe section is equipped with solenoid valve;Low area user pipe network top water outlet end pipeline is connected longitudinal elastic pipe section inlet end.The utility model realizes that municipal pipe network is connected to low area user pipe network and elastic user pipe network in series in non-water peak period and supplies water, realizes energy saving by making full use of the excess head of municipal pipe network;Realize that variable frequency pump group is connected to high area user pipe network and elastic user pipe network in peak period and supplies water, guarantee the water pressure of elastic user pipe network user in this period.

Description

Technical Field

[0001] This utility model relates to the field of secondary water supply, and in particular to a zoned water supply device. Background Technology

[0002] Due to the tidal nature of user usage, namely the significant difference in water consumption between peak and off-peak periods, the secondary water supply network of buildings presents a considerable challenge to the pressure stabilization network of the municipal primary water supply network. Although the municipal primary water supply network increases flow and maintains pressure during peak water usage periods at the water plant source, and decreases flow and stabilizes pressure during off-peak periods to avoid sudden increases and decreases in pressure at the source; in areas where the network is far from the water plant, at high altitudes, or where water usage is concentrated (such as suburbs and densely populated high-rise areas), intermediate booster pump stations are built to supplement pressure like a "relay" to solve the problem of pressure attenuation at distant locations, in some areas, due to excessively concentrated water usage in high-density buildings, or due to the aging of the primary water supply network facilities resulting in limited booster capacity, the excess water head of the municipal network during peak water usage periods causes a drop in the water pressure line supplied to secondary user networks. As a result, existing technology has to accommodate the lower water pressure line of the secondary water supply network to ensure water supply to users in lower-lying areas of buildings during peak water usage periods, but during off-peak water usage periods, the excess water head of the municipal water supply network could have been supplied to users on higher floors, but because the water supply zones are fixed, this results in a waste of excess water head.

[0003] A common type of zoned water supply system involves installing water tanks at the base of buildings, supplying water to lower-level users via the municipal water network using natural head, and then pressurizing the water supply to higher-level users from the tanks. However, considering the water pressure fluctuations from the primary to the secondary water supply network during peak usage periods, existing technologies may lead to two disadvantages: first, the height of the secondary water supply network for lower-level users must be lowered, resulting in a significant amount of unused natural head from the municipal water network during off-peak hours; second, the system fails to account for water pressure fluctuations in the municipal network, causing difficulties for some lower-level users in the secondary water supply area to obtain water. Utility Model Content

[0004] To overcome the above-mentioned defects, the purpose of this utility model is to propose a water supply system that connects a municipal pipeline network and a low-level water tank to a flexible user pipeline network, including: a municipal pipeline network, a low-level user pipeline network, a bottom water tank, a variable frequency pump set, a flexible user pipeline network, and a high-level user pipeline network. Low-zone users' water inlet pipes are equipped with low-zone connection pipes; The low-zone connecting pipe is equipped with a pressure sensor, a flow meter, and a check valve in sequence along the water flow direction; The bottom water tank is equipped with a water supply pipe at the water inlet. At the end of the water supply pipe, a solenoid valve and a float valve are sequentially installed along the water flow direction. A level gauge is installed inside the bottom water tank. The municipal pipeline connects the water supply pipeline to the low-lying area connecting pipeline and is connected to the water inlet. The variable frequency pump set includes two or more variable frequency water pumps connected in parallel; The variable frequency pump set is equipped with a pressure-stabilizing water tank at the water outlet. The bottom water tank, the check valve, and the variable frequency pump set are connected in sequence by pipelines; The water pressure line reached by the municipal water supply network during peak water usage periods is set as the low water pressure line, and the water pressure line reached by the municipal water supply network during off-peak water usage periods is set as the high water pressure line. The flexible user pipeline is located between the low water pressure line and the high water pressure line; The flexible user network is provided with and connected to the water inlet of the flexible user network, including horizontal flexible pipe sections and vertical flexible pipe sections. The transverse elastic pipe section is therefore equipped with the solenoid valve, the pressure reducing valve, and the check valve along the water flow direction; The longitudinal elastic tube section is equipped with the solenoid valve; The water outlet pipe at the top of the low-zone user network is connected to the water inlet of the longitudinal elastic pipe section. The high-zone user network inlet is equipped with a high-zone connection pipe. The outlet pipe of the variable frequency water pump is connected to the high-zone connecting pipe and the parallel water inlet of the transverse elastic pipe section; The pressure sensor is installed at the water inlet of the high-level connecting pipe.

[0005] The operation mode of this utility model is as follows: Parameter settings: The pressure sensor in the low-zone connecting pipe monitors the pressure value as P1 in real time. The flow meter monitors the flow rate in real time, and the value is Q1. The lower limit of the pressure value when the excess water head of the municipal pipe network can supply water to the flexible user pipe network is P, and the upper limit of the total water consumption of the low-zone user pipe network and the flexible user pipe network during this stage is Q. The pressure sensor in the high-zone connecting pipeline monitors the pressure value as P2 in real time. When the water supply network for users in the high-rise area is satisfied, the pressure value of the connecting pipe in the high-rise area is P'.

[0006] Operating method: (1) When P1≥P and Q1≤Q: As the excess water head of the municipal pipeline reaches the high water pressure line, the solenoid valve of the longitudinal elastic pipe section opens and the solenoid valve of the transverse elastic pipe section closes, thereby realizing the series connection of the municipal pipeline to the low-zone user pipeline and the elastic user pipeline. The bottom water tank supplies water to the high-zone user's pipeline network at constant pressure through the operation of the variable frequency pump set. At this time, the variable frequency operation of the variable frequency pump set must satisfy P2=P'.

[0007] (1) When P1 Q: Since the excess water head of the municipal pipeline network does not reach the high water pressure line, the solenoid valve of the longitudinal elastic pipe section is closed, and the solenoid valve of the transverse elastic pipe section is opened, so as to realize the municipal pipeline network to supply water to the low-zone user pipeline network. The bottom water tank supplies water to the high-zone user network and the flexible user network via the variable frequency pump set; at this time, the solenoid valve of the horizontal flexible pipe section opens, and water is supplied to the flexible user network with reduced pressure via the pressure reducing valve; the operation of the variable frequency pump must satisfy P2=P' in order to achieve constant pressure water supply to the high-zone user network.

[0008] The advantages and positive effects of this utility model are as follows: It establishes a flexible user network for water supply to buildings with bottom-mounted water tanks in areas where municipal water pressure fluctuates significantly. During off-peak water usage periods, the municipal network is connected in series to supply water to lower-zone user networks and the flexible user network, achieving energy conservation by fully utilizing excess water head in the municipal network. During peak water usage periods, variable frequency pumps are connected in parallel to supply water to higher-zone user networks and the flexible user network, ensuring water pressure for users in the flexible user network during these periods. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the municipal water supply system and the low-level water tank connected in parallel with the flexible user water supply system of this utility model.

[0010] In the diagram, the following are listed: Municipal Pipeline-1, Low Water Pressure Line-11, High Water Pressure Line-12, Low-Zone User Pipeline-2, Low-Zone Connecting Pipeline-21, Bottom Water Tank-3, Water Supply Pipeline-31, Variable Frequency Pump Set-4, Variable Frequency Water Pump-41, Flexible User Pipeline-5, Horizontal Flexible Pipeline Section-51, Vertical Flexible Pipeline Section-52, High-Zone User Pipeline-6, High-Zone Connecting Pipeline-61, Check Valve-a, Solenoid Valve-b, Float Valve-c, Level Gauge-d, Pressure Sensor-e, Flow Meter-f, Pressure Stabilizing Tank-g, and Pressure Reducing Valve-h. Detailed Implementation

[0011] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0012] like Figure 1 As shown, Example 1: A water supply system that connects a municipal pipeline network and a low-level water tank to a flexible user pipeline network includes: a municipal pipeline network 1, a low-level user pipeline network 2, a bottom water tank 3, a variable frequency pump set 4, a flexible user pipeline network 5, and a high-level user pipeline network 6. Low-zone user network 2 is equipped with a low-zone connection pipe 21 at the water inlet end; The low-zone connecting pipe 21 is equipped with a pressure sensor e, a flow meter f, and a check valve a in sequence along the water flow direction; A water supply pipe 31 is provided at the water inlet of the bottom water tank 3. A solenoid valve b and a float valve c are sequentially provided at the end of the water supply pipe along the water flow direction. A level gauge d is provided inside the bottom water tank 3. The municipal pipeline 1 connects to the water supply pipeline 31 and the low-level connection pipeline 21 and is connected to the water inlet; The variable frequency pump set 4 includes two or more variable frequency water pumps 41 connected in parallel; The variable frequency pump set 4 is equipped with a pressure stabilizing water tank g at the outlet end; Bottom water tank 3, check valve a, and variable frequency pump set 4 are connected by pipes in sequence; The water pressure line reached by the municipal pipeline 1 during peak water usage periods is set as the low water pressure line 11, and the water pressure line reached by the municipal pipeline 1 during off-peak water usage periods is set as the high water pressure line 12. The flexible user pipeline 5 is located between the low water pressure line 11 and the high water pressure line 12; The flexible user network 5 is provided with a horizontal flexible pipe section 51 and a vertical flexible pipe section 52 connected to the water inlet of the flexible user network; The transverse elastic pipe section 51 is therefore equipped with a solenoid valve b, a pressure reducing valve h, and a check valve a along the water flow direction; The longitudinal flexible tube section 52 is equipped with a solenoid valve b; The water outlet pipe at the top of the low-zone user network 2 is connected to the inlet pipe of the longitudinal elastic pipe section 52; The high-zone user pipeline network 6 inlet end is equipped with a high-zone connection pipeline 61; The outlet pipe of the variable frequency water pump 41 is connected to the high-zone connecting pipe 61 and the horizontal elastic pipe section 51 at the water inlet. A pressure sensor e is installed at the water inlet of the high-zone connecting pipe 61.

[0013] The present invention has been described in detail above through embodiments, but the content is only a preferred embodiment of the present invention and should not be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made in accordance with the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A municipal water supply system with a low-level water tank connected to a flexible user water supply network, characterized in that, include: Municipal pipeline network (1), low-zone user pipeline network (2), bottom water tank (3), variable frequency pump set (4), flexible user pipeline network (5), high-zone user pipeline network (6); The low-zone user network (2) has a low-zone connection pipe (21) at the water inlet end. The low-zone connecting pipe (21) is equipped with a pressure sensor (e), a flow meter (f), and a check valve (a) in sequence along the water flow direction. The bottom water tank (3) is provided with a water supply pipe (31) at the water inlet. At the end of the water supply pipe, a solenoid valve (b) and a float valve (c) are provided in sequence along the water flow direction. A level gauge (d) is provided inside the bottom water tank (3). The municipal pipeline (1) is connected to the water supply pipeline (31) and the low-level connection pipeline (21) and connected to the water inlet; The variable frequency pump set (4) includes two or more variable frequency water pumps (41) connected in parallel. The variable frequency pump set (4) is equipped with a pressure stabilizing water tank (g) at the outlet end. The bottom water tank (3), the check valve (a), and the variable frequency pump set (4) are connected in sequence by pipes; The water pressure line reached by the municipal pipeline (1) during peak water usage is set as the low water pressure line (11), and the water pressure line reached by the municipal pipeline (1) during non-peak water usage is set as the high water pressure line (12). The flexible user network (5) is located between the low water pressure line (11) and the high water pressure line (12); The flexible user network (5) is provided with a horizontal flexible pipe section (51) and a vertical flexible pipe section (52) connected to the water inlet of the flexible user network. The transverse elastic pipe section (51) is therefore equipped with the solenoid valve (b), the pressure reducing valve (h), and the check valve (a) along the water flow direction; The longitudinal elastic tube section (52) is equipped with the solenoid valve (b); The water outlet pipe at the top of the low-zone user network (2) is connected to the water inlet of the longitudinal elastic pipe section (52); The high-zone user pipeline (6) is provided with a high-zone connection pipeline (61) at the water inlet end. The outlet pipe of the variable frequency water pump (41) is connected to the high zone connecting pipe (61) and the parallel water inlet of the transverse elastic pipe section (51); The pressure sensor (e) is installed at the water inlet of the high-zone connecting pipe (61).

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