Non-negative pressure water supply system

Abstract

The embodiment of the utility model provides a non-negative-pressure water supply system, and belongs to the technical field of municipal water supply, the non-negative-pressure water supply system comprises at least one water storage component and a frequency conversion pressurization assembly, and the liquid inlet end of the water storage component is used for being connected with a municipal water inlet pipe network through a water inlet valve set; the liquid inlet end of the frequency conversion pressurization assembly is used for being connected with the water storage component and a municipal water inlet pipe network in parallel through branch pipelines, and the liquid outlet end of the frequency conversion pressurization assembly is used for being connected with a user pipe network; the variable-frequency pressurizing assembly is configured to receive water liquid of the water storage component in a first preset state, pressurize the water liquid and output the pressurized water liquid to a user pipe network; and receiving water of the municipal water inlet pipe network in a second preset state, and pressurizing and outputting the water to a user pipe network. According to the non-negative pressure water supply system, parallel operation of municipal direct water supply and water supply of the water storage component is achieved, and stability and flexibility of water supply are guaranteed.

Description

Technical Field

[0001] This application relates to the field of municipal water supply system technology, and in particular to a negative pressure-free water supply system. Background Technology

[0002] A negative pressure-free water supply system utilizes the pressure of the municipal water supply network and combines it with control equipment to ensure stable water pressure for users and prevent negative pressure from forming in the system. Negative pressure-free water supply systems are commonly used in residential communities, industrial parks, and other locations, effectively solving problems such as unstable water pressure or insufficient water flow that may occur in traditional water supply systems.

[0003] In related technologies, the negative pressure-free water supply system needs to provide users with water 24 hours a day without interruption. The overall system has a high water supply workload and causes serious wear and tear on the equipment. Therefore, the entire system needs to be maintained and repaired regularly. However, during the maintenance period, the normal water supply from the municipal pipe network to the residents cannot be guaranteed, which affects the residents' normal work and life. Utility Model Content

[0004] This application provides a negative pressure-free water supply system to solve the technical problem in related technologies where it is impossible to ensure normal water supply from the municipal water supply network during maintenance.

[0005] This application provides a negative pressure-free water supply system, including:

[0006] At least one water storage component, wherein the inlet end of the water storage component is used to connect to the municipal water supply network via an inlet valve assembly;

[0007] A variable frequency pressurization assembly, wherein the inlet end of the variable frequency pressurization assembly is used to be connected in parallel with the water storage component and the municipal water inlet network through branch pipelines respectively, and the outlet end of the variable frequency pressurization assembly is used to be connected to the user's pipeline network;

[0008] The variable frequency pressurization component is configured to receive water from the water storage component in a first preset state and pressurize and output it to the user's pipe network; and to receive water from the municipal water inlet pipe network in a second preset state and pressurize and output it to the user's pipe network.

[0009] In some possible implementations, the variable frequency pressurization component includes:

[0010] At least two variable frequency pump sets, the outlet end of which is used to connect to the user's pipeline network;

[0011] A pressure regulating component, connected in parallel with at least two of the variable frequency pump sets, is configured to regulate the hydraulic pressure of the variable frequency pump sets;

[0012] A flow stabilizer tank, connected in parallel with the branch pipeline and at least two of the variable frequency pump sets, is configured to store the water from the branch pipeline and input the water to the variable frequency pump sets.

[0013] At least one pressure detection component is disposed between the variable frequency pump unit and the pressure regulating component and is configured to detect the hydraulic pressure of the variable frequency pump unit;

[0014] A control unit, connected to the pressure detection unit and the variable frequency pump set, is configured to adjust the pump pressure of the variable frequency pump set based on the hydraulic pressure detected by the pressure detection unit.

[0015] In some possible implementations, there are multiple variable frequency pressurization components, and the multiple variable frequency pressurization components are connected in parallel with the branch pipeline;

[0016] The variable frequency pressurization component is used to connect to the user's pipeline at different locations in the user's pipeline network, and the hydraulic pressure output by at least one of the variable frequency pressurization components is different from the hydraulic pressure output by the other variable frequency pressurization components.

[0017] In some possible implementations, the branch pipeline is provided with at least one control valve that separates the plurality of the variable frequency pressurization components and is used to regulate the on / off state of the branch pipeline.

[0018] In some possible implementations, the branch conduit includes:

[0019] The first sub-pipeline is connected at one end to the outlet end of the water storage component and at the other end to the variable frequency pump set, so as to connect the water storage component and the variable frequency pump set.

[0020] The second sub-pipeline is connected at one end to the municipal water inlet network and at the other end to the flow stabilizing tank, so as to connect the municipal water inlet network and the flow stabilizing tank.

[0021] The first sub-pipeline and the second sub-pipeline are each equipped with a control valve.

[0022] In some possible implementations, the water storage component has two parts, with the outlet end of each water storage component connected in parallel to the first sub-pipeline and the inlet end of each water storage component connected in parallel to the second sub-pipeline.

[0023] In some possible implementations, the inlet valve assembly includes an on / off valve, a flexible joint, a check valve, and a filter component connected in sequence, wherein the on / off valve is used to control the on / off state of the inlet valve assembly.

[0024] In some possible implementations, the inlet valve assembly further includes a flow valve and a flow monitoring component located downstream of the filter element, the flow valve being used to regulate the flow rate of the inlet valve assembly.

[0025] In some possible implementations, a pipe support bracket is also included, which includes a fixed pipe clamp and a plurality of legs connected to the fixed pipe clamp. The fixed pipe clamp is used to wrap the branch pipe and has an embedded insulation layer.

[0026] In some possible implementations, the fixing clamp is further provided with a bent snap-fit ​​portion, which is used to snap the insulation layer into the fixing clamp.

[0027] The negative pressure-free water supply system provided in this application embodiment includes a variable frequency pressurization component configured to receive water from the water storage component in a first preset state and pressurize and output it to the user's pipe network, and to receive water from the municipal water inlet pipe network in a second preset state and pressurize and output it to the user's pipe network. Thus, by switching the working state of the variable frequency pressurization component, parallel operation of the municipal direct water supply and the water supply from the water storage component can be realized. This ensures that the variable frequency pressurization component can maintain stable operation by switching working states during water supply system maintenance and repair, thereby ensuring a stable water supply to the user's pipe network. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is a schematic diagram of the overall structure of the negative pressure-free water supply system in the embodiments of this application;

[0030] Figure 2 for Figure 1 A schematic diagram of the variable frequency pressurization component of a negative pressure-free water supply system;

[0031] Figure 3 for Figure 1 A schematic diagram of the inlet valve assembly of a negative pressure-free water supply system.

[0032] Figure 4 This is a schematic diagram of the pipe support bracket in the embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Water storage components; 101. Inlet valve assembly; 1011. Opening and closing valves; 1012. Flexible joints; 1013. Check valves; 1014. Filter components; 1015. Flow valves; 1016. Flow monitoring components;

[0035] 200. Variable frequency pressurization assembly; 201. Variable frequency pump set; 202. Pressure regulating component; 203. Flow stabilizing tank;

[0036] 300. Branch pipeline; 301. First sub-pipeline; 302. Second sub-pipeline; 303. Control valve;

[0037] 400. Municipal water supply network;

[0038] 500. User pipeline; 501. User demand pipeline;

[0039] 600. Pipe support bracket; 601. Fixed pipe clamp; 602. Support leg; 603. Insulation layer.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0045] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0046] As mentioned in the background art, the negative pressure-free system in the related technology requires uninterrupted 24-hour water supply to users. The overall water supply work intensity is high, and the wear and tear on the equipment is severe. Therefore, the overall system needs to be maintained and repaired regularly. However, during the maintenance period, the normal water supply from the municipal pipe network to the residents cannot be guaranteed, which affects the residents' normal work and life.

[0047] Based on the above description, one or more embodiments of this application provide a negative pressure-free water supply system. In the negative pressure-free water supply system, the variable frequency pressurization component is configured to receive water from the water storage component in a first preset state and pressurize and output it to the user's pipe network, and to receive water from the municipal water inlet pipe network in a second preset state and pressurize and output it to the user's pipe network. Thus, by switching the working state of the variable frequency pressurization component, the parallel operation of the municipal direct water supply and the water supply from the water storage component can be realized. This ensures that the variable frequency pressurization component can maintain stable operation by switching the working state during water supply system maintenance and repair, thus ensuring a stable water supply to the user's pipe network.

[0048] The following description, in conjunction with the accompanying drawings, illustrates the negative pressure-free water supply system provided in the embodiments of this application.

[0049] like Figure 1 As shown in the figure, this application provides a negative pressure-free water supply system, including at least one water storage component 100 and a frequency conversion pressurization component 200.

[0050] The water storage component 100 has an inlet end that is connected to the municipal water supply network 400 via an inlet valve assembly 101. The variable frequency pressurization component 200 has an inlet end that is connected in parallel to both the water storage component 100 and the municipal water supply network 400 via branch pipes 300. The outlet end of the variable frequency pressurization component 200 is connected to the user network 500. The variable frequency pressurization component 200 is configured to receive water from the water storage component 100 in a first preset state and pressurize and output it to the user network 500; and to receive water from the municipal water supply network 400 in a second preset state and pressurize and output it to the user network 500.

[0051] As can be seen from the above description, the negative pressure-free water supply system provided in this application embodiment utilizes a frequency converter pressurizing component 200 connected in parallel with the water storage component 100 and the municipal water supply network 400 via branch pipes 300. When the frequency converter pressurizing component 200 is in the first preset state, the water from the municipal water supply network 400 is first input into the water storage component 100, and then the water from the water storage component 100 is pressurized by the frequency converter pressurizing component 200 and output to the user network 500. When the frequency converter pressurizing component 200 is in the second preset state, the water from the municipal water supply network 400 is directly pressurized by the frequency converter pressurizing component 200 and output to the user network 500. Thus, the negative pressure-free water supply system in this application embodiment realizes the parallel operation of direct municipal water supply and water supply from the water storage component 100, and can switch different water supply sources according to actual usage needs, ensuring stable water pressure in the user network 500 and avoiding water interruption for users due to insufficient municipal water supply or maintenance.

[0052] In this embodiment of the application, the variable frequency pressurization component 200 is one of the core components of the negative pressure-free water supply system. The variable frequency pressurization component 200 is responsible for controlling the water pressure intensity through frequency conversion to make the water pressure reach the set value, and automatically adjusting the output water volume and water pressure according to the change of demand.

[0053] For example, such as Figure 1 and Figure 2 As shown, the variable frequency pressurization assembly 200 includes at least two variable frequency pump sets 201, a pressure regulating component 202, a flow stabilizing tank 203, at least one pressure detection component, and a control component.

[0054] The outlet end of the variable frequency pump set 201 is used to connect to the user's pipeline network 500. The pressure regulating component 202 is connected in parallel with at least two variable frequency pump sets 201 and is configured to regulate the hydraulic pressure of the variable frequency pump set 201. The flow stabilizing tank 203 is connected in parallel with the branch pipeline 300 and at least two variable frequency pump sets 201 and is configured to store the water in the branch pipeline 300 and input the water to the variable frequency pump set 201. At least one pressure detection component is located between the variable frequency pump set 201 and the pressure regulating component 202 and is configured to detect the hydraulic pressure of the variable frequency pump set 201. The control component is connected to the pressure detection component and the variable frequency pump set 201 and is configured to regulate the pump pressure of the variable frequency pump set 201 according to the hydraulic pressure detected by the pressure detection component.

[0055] In the above embodiment, three variable frequency pump sets 201 are connected in parallel. The variable frequency pump sets 201 can be water pumps capable of variable frequency pressurization in related technologies. During peak water consumption periods and scenarios with large water loads, the three variable frequency pump sets 201 work simultaneously to pressurize the water, thereby ensuring a stable and continuous water supply to the user's pipeline network 500. During off-peak water consumption periods and scenarios with small water loads, the number of variable frequency pump sets 201 in operation is reduced. For example, only one or two variable frequency pump sets 201 operate to adjust the water pressure accordingly. This design can save operating energy and reduce the working time of multiple variable frequency pump sets 201, thereby helping to extend the service life of the variable frequency pump sets 201.

[0056] The pressure regulating component 202 is connected in parallel with the variable frequency pump set 201 to regulate the water pressure flowing into the variable frequency pump set 201 and ensure that the pump operates within a suitable pressure range.

[0057] Generally, the pressure regulator 202 is a diaphragm-type pressure tank in related technologies. The diaphragm-type pressure tank is divided into an air section and a water section by a diaphragm. The water section is connected to the system pipeline. When the negative pressure water supply system is running, the water from the system pipeline enters the water section of the pressure tank. When the water pressure is high, the air section inside the pressure tank is compressed; when the water pressure is low, the air section inside the pressure tank is released. The diaphragm feeds back the water pressure from the water section to the system pipeline. The pressure regulator 202 absorbs and releases pressure fluctuations through its internal gas section, stabilizing the system water pressure and preventing damage to the water pump and pipeline system due to pressure fluctuations. Of course, other types of components can also be used for the pressure regulator 202, as long as they can balance and buffer pipeline water pressure fluctuations.

[0058] In the above embodiment, the flow stabilizing tank 203 is used to store and buffer water from the branch pipe 300 and input the water into the variable frequency pump set 201. On the one hand, the flow stabilizing tank 203 can directly receive water from the municipal water inlet network 400, so that the municipal water inlet network 400 can be directly input into the user network 500 through the variable frequency pump set 201. On the other hand, the flow stabilizing tank 203 can also further buffer and balance the fluctuation of water pressure in the pipeline, thereby enhancing the stability of water pressure in the pipeline.

[0059] In this embodiment of the application, the pressure detection component can be a pressure sensor. For example, multiple pressure detection components are provided. Among them, a pressure detection component is provided between the variable frequency pump group 201 and the pressure regulating component 202, and a pressure detection component is also provided between the variable frequency pump group 201 and the user pipeline network 500. Setting up pressure detection components can monitor pipeline pressure more intuitively and accurately, thereby making it easier for operators to obtain the water supply status based on pipeline pressure.

[0060] It should be noted that the control component is used to regulate the operation of the variable frequency pump set 201 and the valves, precisely adjusting the water supply pressure according to changes in water demand to ensure a stable water supply. For example, the control component is typically a variable frequency controller, such as the N747D mobile control type constant pressure variable frequency controller from Zhonghan Duco Pump Manufacturing Co., Ltd. Each variable frequency pump set 201 is connected to a control component, and each variable frequency pump set 201 is controlled by a control component for frequency conversion.

[0061] In some embodiments, such as Figure 1 As shown, there are multiple variable frequency pressurization components 200, and multiple variable frequency pressurization components 200 are connected in parallel with branch pipelines 300; the variable frequency pressurization components 200 are used to connect to user demand pipelines 501 at different locations of the user pipeline network 500, and the hydraulic pressure output by at least one variable frequency pressurization component 200 is different from the hydraulic pressure output by the other variable frequency pressurization components 200.

[0062] Figure 1 The system comprises 11 sets of variable frequency pressurization components 200, from equipment group 1 to equipment group 11. Each set of variable frequency pressurization components 200 contains three sets of variable frequency pumps 201. Each set of variable frequency pressurization components 200 is connected to the user demand pipeline 501 of the user pipeline network 500. For example, the user pipeline network 500 includes users in 13 buildings (buildings 1-13). Based on factors such as terrain and hydraulic demand, the users in these 13 buildings are divided into low-pressure water area, medium-pressure water area, medium-high pressure water area, and high-pressure water area. The variable frequency pressurization components 200 can connect to the user demand pipeline 501 of multiple buildings.

[0063] As an alternative implementation, the 11 sets of variable frequency pressurization components 200 are divided into a superimposed pressurization water supply system. For example, among the 11 sets of variable frequency pressurization components 200, equipment group 1 and equipment group 2 supply water to all buildings; equipment groups 3 to 5 supply water to all buildings; equipment groups 6 to 8 supply water to all buildings; and equipment groups 9 to 11 supply water to all buildings. That is, among the multiple sets of variable frequency pressurization components 200, water is supplied to all buildings in the user network 500 through four complete pressurization processes. This setup can further ensure the stability of the water supply and prevent water outages in the user network 500 due to maintenance shutdowns of some equipment.

[0064] Furthermore, in this embodiment of the application, at least one control valve 303 is provided on the branch pipeline 300. The control valve 303 separates multiple frequency conversion pressurization components 200 and is used to regulate the on / off state of the branch pipeline 300.

[0065] In the above embodiments, multiple control valves 303 can be provided. The control valves 303 on the branch pipeline 300 adjust the overall on / off status of the frequency converter pressurization component 200 by switching their on / off states. Thus, when some of the frequency converter pressurization components 200 fail and need to be repaired, their water circuit can be cut off by adjusting the control valves 303, and repairs can be carried out without affecting the operation of other frequency converter pressurization components 200.

[0066] like Figure 1 As shown, the branch pipeline 300 in this embodiment includes a first sub-pipeline 301 and a second sub-pipeline 302. One end of the first sub-pipeline 301 is connected to the outlet end of the water storage component 100, and the other end is connected to the variable frequency pump set 201 to connect the water storage component 100 and the variable frequency pump set 201. One end of the second sub-pipeline 302 is connected to the municipal water inlet network 400, and the other end is connected to the flow stabilizing tank 203 to connect the municipal water inlet network 400 and the flow stabilizing tank 203. A control valve 303 is respectively provided on the first sub-pipeline 301 and the second sub-pipeline 302.

[0067] Here, there are two water storage components 100. The outlet end of each water storage component 100 is connected in parallel with the first sub-pipeline 301, and the inlet end of each water storage component 100 is connected in parallel with the second sub-pipeline 302.

[0068] by Figure 1 As shown in the example, Figure 1 In the middle, the water storage component 100 is provided in two separate parts. The inlet end of the upper water storage component 100 is connected to the municipal water supply network 400 through the inlet valve group 101, and the outlet end is directly connected to the variable frequency pump group 201 through the first sub-pipe 301. The upper water storage component 100 can directly deliver water to the user network 500 through the first set of pipes and the variable frequency pump group 201.

[0069] Both the lower and upper water storage components 100 are connected to the municipal water supply network 400. The municipal water supply network 400 is divided into two lines: one line is directly connected to the upper water storage component 100 to supply water to it, and the other line is connected to the lower water storage component 100 to supply water to it. In the line connected to the lower water storage component 100, part of the flow stabilizing tank 203 of the variable frequency pressurization component 200 passes through it. That is, part of the water in the flow stabilizing tank 203 is also directly supplied through the municipal water supply network 400, while the other part of the water in the flow stabilizing tank 203 is supplied through the lower water storage component 100.

[0070] The above configuration allows the flow stabilizer tank 203 to have two water supply states, effectively avoiding the problem of the flow stabilizer tank 203 being unusable due to maintenance or malfunction of the lower water storage component 100. At the same time, since the flow stabilizer tank 203 has two water supply states, namely water supply from the municipal water inlet network 400 and water supply from the water storage component 100, it can also ensure the stability of water pressure and provide a more flexible water supply path for the water supply system.

[0071] In this embodiment of the application, the water storage component 100 can be a stainless steel water storage tank. Furthermore, the middle part of the water storage component 100 is divided into upper and lower partition cavities by a partition, thereby realizing the change in the number of water storage components 100.

[0072] like Figure 3 As shown in the embodiment of this application, the inlet valve assembly 101 includes an on / off valve 1011, a flexible connector 1012, a check valve 1013, and a filter component 1014 connected in sequence. The on / off valve 1011 is used to control the on / off state of the inlet valve assembly 101.

[0073] Generally, the flexible joint 1012 in the inlet valve assembly 101 can be a metal flexible pipe. Setting up the flexible joint 1012 can reduce thermal expansion, vibration and displacement in the pipeline system, thereby reducing rigid contact between pipes and alleviating pipeline deformation caused by pressure fluctuations. The check valve 1013 is a rubber flap check valve 1013, and the filter component 1014 is a Y-type filter.

[0074] In some embodiments, the inlet valve assembly 101 further includes a flow valve 1015 and a flow monitoring component 1016 disposed downstream of the filter component 1014. The flow valve 1015 is used to regulate the flow rate of the inlet valve assembly 101. By detecting the flow rate and pressure of the municipal water supply network 400, the water supply status of the municipal water supply network 400 can be determined, thereby facilitating the operator to determine whether it is necessary to switch the water supply mode of the variable frequency pump unit 201.

[0075] It should be noted that, as Figure 4As shown in the embodiment of this application, the branch pipes 300 are all fixed by the pipe support bracket 600. The pipe support bracket 600 includes a fixed pipe clamp 601 and a plurality of legs 602 connected to the fixed pipe clamp 601. The fixed pipe clamp 601 is used to wrap the branch pipes 300, and the fixed pipe clamp 601 is embedded with a heat insulation layer 603.

[0076] In the aforementioned pipe support bracket 600, the support leg 602 is fixed to the wall or ground by expansion bolts. The fixing clamp 601 can be one or more, depending on the number of parallel pipes. The insulation layer 603 embedded in the fixing clamp 601 not only insulates the pipe, but also protects the pipe and reduces the vibration and impact of the pipe, thus achieving the dual effects of buffering and insulation.

[0077] Furthermore, the fixing clamp 601 is also provided with a bent snap-fit ​​part, which is used to snap and fix the insulation layer 603 in the fixing clamp 601 to prevent the insulation layer 603 from falling off. Here, the actual number of support legs 602 can also be flexibly adjusted according to the strength requirements of the pipeline assembly. Figure 4 The support 602 has two legs. In some embodiments, the support 602 may also be set to three or more.

[0078] In this embodiment, under normal circumstances, the municipal water inlet network 400 directly supplies water to the variable frequency pressurization component 200 through the second sub-pipe 302 of the branch pipe 300, and the water from the municipal water inlet network is directly input into the user network 500. When the water flow of the municipal water inlet network 400 is insufficient, the water pressure drops to the minimum operating pressure. Instead of directly supplying water through the variable frequency pressurization component 200, the municipal water inlet network 400 first injects water into the water storage component 100, and the water storage component 100 supplies water to the variable frequency pressurization component 200 to meet the user's water demand and ensure that the user network 500 is not affected by the pressure fluctuation of the municipal water inlet network 400 during use.

[0079] When the negative pressure water supply system is in a low water supply period or when no one is using water at night, multiple variable frequency pump sets 201 do not need to be fully operational. Instead, some variable frequency pump sets 201 can be controlled to operate through the control components, reducing the number of pump starts and achieving energy-saving effects.

[0080] In addition, when the pressure of the municipal water inlet network 400 is stable, the first sub-pipe 301 can be opened to supply water to the variable frequency pressurization component 200 through the water storage component 100. This setting can keep the water in the water storage component 100 fresh and prevent the water in the water storage component 100 from being stored for too long.

[0081] On the other hand, this application also provides a water supply method applicable to any of the negative pressure-free water supply systems described in the above embodiments, the water supply method comprising:

[0082] The municipal water inlet pipe network 400 is disconnected from the variable frequency pressurization component 200, and the water storage component 100 is connected to the variable frequency pressurization component 200, so that the variable frequency pressurization component 200 receives the water liquid from the water storage component 100 and pressurizes and outputs it to the user pipe network 500.

[0083] The system connects the municipal water inlet network 400 to the variable frequency pressurization component 200 and disconnects the water storage component 100 from the variable frequency pressurization component 200, so that the variable frequency pressurization component 200 receives the water from the municipal water inlet network 400 and pressurizes it to output to the user network 500.

[0084] In the above steps, the municipal water inlet network 400 is disconnected from the variable frequency pressurization component 200, and the water storage component 100 is connected to the variable frequency pressurization component 200. The variable frequency pressurization component 200 is in the first preset state, and the water storage component 100 supplies water to the user network 500. The municipal water inlet network 400 is connected to the variable frequency pressurization component 200, and the water storage component 100 is disconnected from the variable frequency pressurization component 200. The variable frequency pressurization component 200 is in the second preset state, and the municipal water inlet network 400 directly supplies water to the user network 500.

[0085] Since the water supply method in this application embodiment is used in the above-mentioned negative pressure-free water supply system, it has all the advantages of the negative pressure-free water supply system.

[0086] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the novel features disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0087] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A non-negative pressure water supply system, characterized by, The utility model relates to a kind of water supply systems, comprising: At least one water storage component (100), the liquid inlet end of the water storage component (100) is used to be connected with municipal water supply network (400) by water inlet valve group (101); Variable frequency pressurizing assembly (200), the liquid inlet end of the variable frequency pressurizing assembly (200) is used to be connected with the water storage component (100) and the municipal water supply network (400) respectively by branch pipe (300) parallelly, the liquid outlet end of the variable frequency pressurizing assembly (200) is used to be connected with user pipe network (500); The variable frequency pressurizing assembly (200) is configured to, in the first preset state, receive the water liquid of the water storage component (100), and pressurized output is to the user pipe network (500);In the second preset state, receive the water liquid of the municipal water supply network (400), and pressurized output is to the user pipe network (500).

2. The non-positive supply water system according to claim 1, characterized in that The variable frequency pressurizing assembly (200) comprises: At least two variable frequency pump groups (201), the liquid outlet end of the variable frequency pump group (201) is used to be connected with the user pipe network (500); Pressure regulating piece (202) is connected in parallel with at least two variable frequency pump groups (201), and is configured to adjust the hydraulic pressure of the variable frequency pump group (201); Steady flow tank (203) is connected in parallel with the branch pipe (300) and at least two variable frequency pump groups (201), and is configured to store the water liquid of the branch pipe (300), and input water liquid to the variable frequency pump group (201); At least one pressure detection component is arranged between the variable frequency pump group (201) and the pressure regulating piece (202), and is configured to detect the hydraulic pressure of the variable frequency pump group (201); Control component is connected with the pressure detection component and the variable frequency pump group (201), and is configured to regulate and control the pump pressure of the variable frequency pump group (201) according to the hydraulic pressure detected by the pressure detection component.

3. The non-positive water supply system according to claim 2, characterized in that The variable frequency pressurizing assembly (200) has multiple, and multiple variable frequency pressurizing assemblies (200) are connected in parallel with the branch pipe (300); The variable frequency pressurizing assembly (200) is used to correspond to the user demand pipe (501) connection of different positions of the user pipe network (500), and the hydraulic pressure output by at least one variable frequency pressurizing assembly (200) is different from the hydraulic pressure output by the rest variable frequency pressurizing assemblies (200).

4. The non-positive water supply system according to claim 3, characterized in that At least one control valve (303) is arranged on the branch pipe (300), the control valve (303) separates multiple variable frequency pressurizing assemblies (200), and the control valve (303) is used to regulate and control the on-off state of the branch pipe (300).

5. The non-positive water supply system according to claim 4, characterized in that The branch pipe (300) comprises: First sub-pipe (301), one end is connected with the liquid outlet end of the water storage component (100), the other end is connected with the variable frequency pump group (201), to communicate the water storage component (100) and the variable frequency pump group (201); Second sub-pipe (302), one end is connected with the municipal water supply network (400), the other end is connected with the steady flow tank (203), to be used for communicating the municipal water supply network (400) and the steady flow tank (203); The first sub-pipeline (301) and the second sub-pipeline (302) are respectively provided with a control valve (303).

6. The non-positive water supply system according to claim 5, characterized in that The water storage components (100) are two, the liquid outlet of each water storage component (100) is connected in parallel with the first sub-pipeline (301), and the liquid inlet of each water storage component (100) is connected in parallel with the second sub-pipeline (302).

7. The non-positive water supply system according to any one of claims 1 to 6, characterized in that The water inlet valve group (101) comprises an opening and closing valve member (1011), a flexible joint (1012), a check valve (1013) and a filter component (1014) connected in sequence, and the opening and closing valve member (1011) is used for controlling the on-off state of the water inlet valve group (101).

8. The no negative pressure water supply system according to claim 7, characterized in that, The water inlet valve group (101) further comprises a flow valve (1015) and a flow monitoring component (1016) arranged downstream of the filter component (1014), and the flow valve (1015) is used for regulating the flow of the water inlet valve group (101).

9. The non-positive water supply system according to any one of claims 1 to 6, characterized in that Further comprising a pipeline support bracket (600), the pipeline support bracket (600) comprises a fixed pipe clamp (601) and a plurality of supporting legs (602) connected with the fixed pipe clamp (601), the fixed pipe clamp (601) is used for wrapping the branch pipeline (300), and the fixed pipe clamp (601) is embedded with a heat preservation layer (603).

10. The no negative pressure water supply system according to claim 9, characterized in that, The fixed pipe clamp (601) is further provided with a bent clamping part, and the clamping part is used for clamping and fixing the heat preservation layer (603) in the fixed pipe clamp (601).

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