Secondary water supply system

Abstract

The embodiment of the application provides a secondary water supply system, and relates to the technical field of secondary water supply. The secondary water supply system comprises a tank body, a flow regulating cavity and a high-pressure energy storage cavity are arranged in the tank body, a water outlet and a water inlet for connecting a water supply end are arranged on the tank body, and the water inlet and the water outlet are both communicated with the flow regulating cavity; a water pump unit, a suction inlet of the water pump unit is communicated with the water outlet; an air bag, the air bag is arranged in the high-pressure energy storage cavity, and the air bag is filled with compressed gas; and a control assembly, the control assembly is configured to, when a liquid level value in the flow regulating cavity is less than or equal to a first preset value, connect the high-pressure energy storage cavity with the water outlet, so that the high-pressure energy storage cavity supplies water to the water outlet. The secondary water supply system is beneficial to improving the problem that the water pump unit is quickly consumed, and is helpful to improving water supply stability.

Description

Technical Field

[0001] This application relates to secondary water supply technology, and more particularly to a secondary water supply system. Background Technology

[0002] Secondary water supply refers to a water supply method that supplies water to users or for self-use through storage, pressurization and other facilities when the pressure of the public water supply network cannot meet the water demand.

[0003] The secondary water supply system mainly includes a water storage tank and a water pump unit. The water storage tank stores water when the water supply network has excess pressure, and the water pump unit draws water from the water storage tank during peak water usage periods. The water pump unit provides different water pressures through its own frequency conversion. The pressure of the water supply network plus the pressure of the water pump unit supplies water to users.

[0004] However, during peak water usage periods, the water pump unit bears a heavy water supply burden and needs to operate at a high load continuously. Furthermore, the flow rate at the water pump unit fluctuates frequently, which leads to faster wear and tear on the water pump unit and affects the stability of the water supply. Summary of the Invention

[0005] This application provides a secondary water supply system to improve the problem of rapid wear and tear of water pump units, which affects the stability of water supply.

[0006] This application provides a secondary water supply system, including:

[0007] The tank body is provided with a flow regulating chamber and a high-pressure energy storage chamber. The tank body is provided with an outlet and an inlet for connecting to the water supply end. Both the inlet and the outlet are connected to the flow regulating chamber.

[0008] A water pump unit, wherein the suction port of the water pump unit is connected to the outlet port;

[0009] An airbag is disposed in the high-pressure energy storage chamber and is filled with compressed gas.

[0010] A control component is configured to connect the high-pressure energy storage chamber to the water outlet when the liquid level in the flow regulating chamber is less than or equal to a first preset value, so that the high-pressure energy storage chamber supplies water to the water outlet.

[0011] In one possible implementation, the tank body is further provided with a pre-pressure balancing chamber, and the pre-pressure balancing chamber is provided with a first elastic diaphragm, which divides the pre-pressure balancing chamber into a water storage chamber and a pressure chamber.

[0012] The control component is configured to connect the water storage chamber and the water outlet when the high-pressure energy storage chamber is disconnected from the water outlet.

[0013] In one possible implementation, the secondary water supply system further includes a first separating component for separating the flow regulating chamber and the high-pressure energy storage chamber, the first separating component being adjustable in position along the axial direction of the tank.

[0014] In one possible implementation, the first separating component includes:

[0015] A guide member is provided on the inner wall of the tank;

[0016] A partition, wherein the partition is slidably connected to the guide member;

[0017] A locking element is provided on the partition plate for locking the partition plate onto the guide member.

[0018] In one possible implementation, the first partition assembly further includes a seal that seals between the partition and the inner wall of the tank.

[0019] In one possible implementation, the seal has an extension extending axially along the tank body, the extension conforming to the inner wall of the tank body.

[0020] In one possible implementation, the secondary water supply system further includes a second partition assembly, wherein the water storage chamber is adjacent to the high-pressure energy storage chamber, and the second partition assembly includes a second elastic diaphragm separating the high-pressure energy storage chamber and the water storage chamber.

[0021] In one possible implementation, the second separation assembly further includes a mounting member, and an mounting fitting is provided on the inner wall of the tank. When the mounting member is connected to the mounting fitting, the mounting member and the mounting fitting together clamp the peripheral edge of the second elastic diaphragm.

[0022] In one possible implementation, the control component includes:

[0023] A first liquid level gauge is disposed in the flow regulating cavity and is used to detect a first liquid level value in the flow regulating cavity;

[0024] The second liquid level gauge is installed in the high-pressure energy storage chamber and is used to detect the second liquid level value in the high-pressure energy storage chamber.

[0025] A first valve is located between the high-pressure energy storage chamber and the water outlet, and is used to restrict the flow of liquid between the high-pressure energy storage chamber and the water outlet;

[0026] The second valve is located between the water storage chamber and the water outlet, and is used to restrict the flow of liquid between the water storage chamber and the water outlet;

[0027] The control unit is electrically connected to the first level gauge, the second level gauge, the first valve, and the second valve.

[0028] The control unit is configured to control the first valve to open and the second valve to close when the first liquid level value is less than or equal to the first preset value, and to control the first valve to close and the second valve to open when the second liquid level value is greater than or equal to the second preset value, wherein the second preset value is greater than the first preset value.

[0029] In one possible implementation, the secondary water supply system further includes an inflation device connected to the airbag and a vacuum suppressor connected to the high-pressure energy storage chamber. The control component further includes a pressure sensor for detecting the air pressure in the high-pressure energy storage chamber. The vacuum suppressor, the inflation device, and the pressure sensor are all electrically connected to the control unit.

[0030] The control unit is configured to control the vacuum suppressor to close and control the inflation device to inflate the airbag when the second liquid level value is greater than or equal to the second preset value and the first valve is closed, and to control the inflation device to deflate the airbag when the pressure value measured by the pressure sensor is less than the preset pressure value.

[0031] The secondary water supply system provided in this application includes a tank with a flow regulating chamber and a high-pressure energy storage chamber. The tank is provided with an inlet and an outlet connected to the flow regulating chamber. The inlet is connected to the water supply end, and the outlet is connected to the water pump unit. The high-pressure energy storage chamber is equipped with an air bladder filled with compressed air and a control component. When the water pressure at the water supply end is insufficient, the liquid level in the flow regulating chamber will continue to drop, and the corresponding burden on the water pump unit will be greater. When the liquid level is lower than a first preset value, the control component can connect the high-pressure energy storage chamber to the outlet, so that the high-pressure energy storage chamber supplies water to the outlet. The water sucked into the water pump unit can be superimposed on part of the pressure of the high-pressure energy storage chamber, which can alleviate the burden on the water pump unit. In addition, the elasticity of the air bladder can absorb part of the flow fluctuations during water supply, which can help improve the problem of rapid wear and tear of the water pump unit and help improve the stability of water supply.

[0032] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a structural diagram of the secondary water supply system provided in this application;

[0035] Figure 2 for Figure 1 Schematic diagram of the structure of the first and second partition components;

[0036] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0037] Figure 4 for Figure 2 Enlarged view of part B in the middle;

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Tank body; 110. Flow regulating chamber; 120. High-pressure energy storage chamber; 130. Pre-pressure balancing chamber; 131. Water storage chamber; 132. Air pressure chamber; 101. Water outlet; 102. Water inlet; 103. First elastic diaphragm; 104. Installation fittings; 105. First pipeline; 106. Second pipeline; 107. Third pipeline;

[0040] 200. Water pump unit;

[0041] 300, airbag;

[0042] 400. Control component; 410. First level gauge; 420. Second level gauge; 430. First valve; 440. Second valve; 450. Third valve;

[0043] 500, First partition assembly; 510, Guide member; 520, Partition; 530, Locking member; 540, Seal member; 541, Extension;

[0044] 600, Second partition assembly; 610, Second elastic diaphragm; 620, Mounting component;

[0045] 700. Vacuum suppressor;

[0046] 800. Inflatable equipment;

[0047] 900. Pressure sensor.

[0048] 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

[0049] 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. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all 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.

[0050] 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 between 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.

[0051] 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.

[0052] The terms "first," "second," "third," "fourth," etc., used in the specification 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.

[0053] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or components is not necessarily limited to those steps or components that are explicitly listed, but may include other steps or components that are not explicitly listed or that are inherent to those processes, methods, products, or apparatuses.

[0054] Secondary water supply technology is widely used in high-rise residential buildings, commercial complexes, industrial parks, and industrial production areas where the original pressure of the municipal water supply network is insufficient or the pressure coverage is limited. In these scenarios, the water supply system typically requires a water storage and pressurization unit between the municipal water supply end and the end user to ensure a continuous and stable water supply for high-rise buildings, remote pipelines, or short-term concentrated water use locations. To achieve this goal, the system architecture generally includes a water storage tank connected to the water supply end, a pump station or pump unit connected to the water storage tank, and control components connected to the user's water supply network. The water storage tank is used to store water when water supply conditions are good, while the pump unit undertakes the tasks of suction and pressurization during daily and peak water supply periods, thus forming a basic water supply system suitable for secondary water supply scenarios.

[0055] Existing secondary water supply systems typically employ a working mode of water storage tanks, pump units, and variable frequency control. Specifically, incoming water first enters the water storage tank, which acts as a buffer unit to store a certain amount of water. The pump unit then draws water from the storage tank and delivers it to the user's pipe network, adjusting the output pressure through variable frequency speed control to adapt to changes in water demand at different times.

[0056] Under normal operating conditions, this method can meet general water supply needs, and the water storage tank only serves the function of static water storage. However, during peak water usage periods, the water pump unit is prone to operating at high load for extended periods and frequent frequency changes, which will exacerbate the wear and tear on the water pump unit and affect the stability of the secondary water supply system.

[0057] Based on this, this application proposes a secondary water supply system, including a tank with a flow regulating chamber and a high-pressure energy storage chamber. The tank is provided with an inlet and an outlet connected to the flow regulating chamber. The inlet is connected to the water supply end, and the outlet is connected to a water pump unit. The high-pressure energy storage chamber is equipped with an air bladder filled with compressed air and a control component. When the water pressure at the water supply end is insufficient, the liquid level in the flow regulating chamber will continue to drop, and the corresponding burden on the water pump unit will be greater. When the liquid level is lower than a first preset value, the control component can connect the high-pressure energy storage chamber to the outlet, so that the high-pressure energy storage chamber supplies water to the outlet. The water sucked into the water pump unit can be superimposed on part of the pressure of the high-pressure energy storage chamber, relieving the burden on the water pump unit. Moreover, the elasticity of the air bladder can absorb some of the flow fluctuations during water supply, thereby helping to improve the problem of rapid wear and tear of the water pump unit and helping to improve the stability of water supply.

[0058] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0059] Reference Figure 1This embodiment of a secondary water supply system includes a tank 100, a pump unit 200, an air bladder 300, and a control component 400. The tank 100 contains a flow regulating chamber 110 and a high-pressure energy storage chamber 120. The tank 100 has an outlet 101 and an inlet 102 for connecting to the water supply end, both connected to the flow regulating chamber 110. The suction port of the pump unit 200 is connected to the outlet 101. The air bladder 300 is located in the high-pressure energy storage chamber 120 and is filled with compressed gas. The control component 400 is configured to connect the high-pressure energy storage chamber 120 to the outlet 101 when the liquid level in the flow regulating chamber 110 is less than or equal to a first preset value, thereby supplying water from the high-pressure energy storage chamber 120 to the outlet 101.

[0060] Tank 100 is the main shell used to hold water from the secondary water supply and forms the internal functional cavity, its function being to store incoming water. Tank 100 is located between the water supply end and the water pump unit 200, with inlet 102 connected to the water supply pipeline at the water supply end, which can be, for example, a municipal water supply network, and outlet 101 connected to the water pump unit 200. Tank 100 can adopt a horizontal cylindrical or irregularly shaped shell configuration to adapt to the machine room layout space, installation and maintenance methods, and site conditions of different flow rates, and its material can be, for example, stainless steel.

[0061] The flow regulating chamber 110 is a functional cavity within the tank 100 used to receive incoming water, temporarily store water, and smooth short-term flow fluctuations. Its function is to ensure that the water flowing into the tank 100 from the supply end is first buffered and regulated before being pumped out by the water pump unit 200, thereby reducing the direct impact of pressure fluctuations at the supply end on the user side. A manhole is provided at the top of the tank 100 corresponding to the flow regulating chamber 110 to facilitate cleaning and maintenance by personnel.

[0062] The high-pressure energy storage chamber 120 is an energy storage space within the tank 100 used for pressure storage and rapid energy release via compressed gas. Its function is to replenish water supply pressure and flow to the outlet 101 using the internal energy storage medium when the liquid level in the flow regulating chamber 110 drops below a first preset value, thereby providing water supply support for the system. A manhole is provided at the top of the tank 100 corresponding to the high-pressure energy storage chamber 120 to facilitate cleaning and maintenance by personnel.

[0063] The airbag 300 can be located in the middle or lower part of the high-pressure energy storage chamber 120, and is submerged when the water level in the high-pressure energy storage chamber 120 reaches its maximum. The airbag 300 can be made of natural rubber, butyl rubber, or polyurethane elastomer. The airbag 300 can be spherical, bag-shaped, or cylindrical, and its wall thickness, elastic modulus, and fatigue resistance can be designed according to the working pressure level and cycle requirements.

[0064] The water pump unit 200 is a power unit used to draw and pressurize water from the side of the tank 100 and deliver it to the user's pipe network. Its function is to increase the pressure of the water output from the outlet 101 so that the user end obtains the required water supply pressure. The water pump unit 200 can be a single pump structure, a parallel dual pump structure, or a multi-pump controlled structure. Its power form can be asynchronous motor drive, permanent magnet synchronous motor drive, or variable frequency drive. The specific pump type can be a centrifugal pump, a vertical multistage pump, or an end-suction pump, etc., to adapt to different head and flow requirements.

[0065] During operation, when there is concentrated water usage on the user side and insufficient water supply at the water supply end, the liquid level in the flow regulating chamber 110 drops accordingly. When the liquid level is less than or equal to the first preset value, the control component 400 establishes a connection between the high-pressure energy storage chamber 120 and the outlet 101. At this time, the air bladder 300 driven by compressed gas in the high-pressure energy storage chamber 120 rebounds, and the water stored outside the air bladder 300 is pushed to the outlet 101 under the expansion of the air bladder 300. This water, together with the suction process of the water pump unit 200, supplements the water supply pressure and flow to the downstream pipeline network. Because the high-pressure energy storage chamber 120 can actively participate in water supply during the liquid level drop phase, the system no longer relies entirely on the water pump unit 200 to increase its speed alone to compensate for the flow gap. Therefore, it can reduce the pump unit load under short-term high-demand conditions, reduce the probability of frequent frequency conversion and overload operation, and make the pressure change on the outlet 101 side more gradual. This helps to improve the problem of rapid wear and tear of the water pump unit 200 and helps to improve the stability of water supply.

[0066] For example, a first pipe 105 can be provided between the outlet 101 and the suction port of the pump unit 200 for connection, and a second pipe 106 can be provided at the bottom of the high-pressure energy storage chamber 120, connecting the first pipe 105 and the high-pressure energy storage chamber 120. When the tank 100 is a horizontal cylindrical shape, the value range of the first preset value is 30%-40% of the diameter of the tank 100, specifically 30%, 32%, 35%, 38%, 40%, etc.

[0067] In one possible implementation, the tank 100 further includes a pre-pressure balancing chamber 130, within which a first elastic diaphragm 103 divides the pre-pressure balancing chamber 130 into a water storage chamber 131 and a pressure chamber 132. The control assembly 400 is configured to connect the water storage chamber 131 and the water outlet 101 when the high-pressure energy storage chamber 120 is disconnected from the outlet 101.

[0068] The pre-pressure balancing chamber 130 is used to replenish water to the outlet 101 through its own water storage chamber 131 and absorb water pressure fluctuations using the first elastic diaphragm 103 when the high-pressure energy storage chamber 120 is not involved in water supply or is in a disconnected state. The first elastic diaphragm 103 is an isolation component with reversible elastic deformation capability, which divides the internal space of the pre-pressure balancing chamber 130 into a water storage chamber 131 and a pressure chamber 132 that are gas-liquid isolated from each other. The water storage chamber 131 is used to store water connected to the outlet 101, and the pressure chamber 132 is used to form a compressible gas buffer space so that pressure balance can be achieved through diaphragm deformation when the water pressure in the water storage chamber 131 changes. The first elastic diaphragm 103 can be structurally made of any of the following: flat membrane, arc membrane, or corrugated membrane. The material can be at least one of rubber, silicone, nitrile rubber, fluororubber, rubber composite fabric, or other elastic materials with water pressure resistance, fatigue resistance, and corrosion resistance to meet the requirements of long-term reciprocating deformation use.

[0069] In specific implementation, a third pipe 107 can be set at the bottom of the water storage chamber 131 to connect the water storage chamber 131. The third pipe 107 is connected to the first pipe 105, so that the water storage chamber 131 and the flow regulating chamber 110 have a communicating vessel effect. When the high-pressure energy storage chamber 120 does not supply water, the water storage chamber 131 can assist the flow regulating chamber 110 in supplying water to the water pump unit 200.

[0070] The air pressure range in the air pressure chamber 132 is 0.3MPa-0.5MPa. An air nozzle can be installed on the tank 100, which is connected to the air pressure chamber 132 to facilitate the inflation or deflation of the air pressure chamber 132.

[0071] By setting up a pre-pressure balancing chamber 130, the water storage chamber 131 and the air pressure chamber 132 are separated by a first elastic diaphragm 103. During the output process, the water in the water storage chamber 131 fluctuates. The first elastic diaphragm 103 can deform to compress the gas in the air pressure chamber 132. The gas in the air pressure chamber 132 will form a reverse supporting force on the first elastic diaphragm 103 and absorb the pressure fluctuations of the water in this process. When there is a short-term fluctuation in water usage at the user end, and the high-pressure energy storage chamber 120 is not involved in water supply, the pre-pressure balancing chamber 130 can release the stored water and use the compressibility of the air pressure chamber 132 to absorb the pressure fluctuations, reducing the response burden of the water pump unit 200.

[0072] Therefore, it can be seen that the pre-pressure balancing chamber 130 can continuously replenish water and stabilize the pressure at the outlet 101, reduce the fluctuation range of water supply pressure, reduce the frequent start and stop of water pumps, and improve the continuous water supply capacity and operational stability of the secondary water supply system under instantaneous flow change scenarios.

[0073] Reference Figure 1 , Figure 2 and Figure 3As shown, in one possible implementation, the secondary water supply system further includes a first separating component 500 for separating the flow regulating chamber 110 and the high-pressure energy storage chamber 120, the position of the first separating component 500 in the axial direction of the tank body 100 being adjustable.

[0074] With this configuration, by moving the first partition component 500, the volume ratio of the flow regulating chamber 110 and the high-pressure energy storage chamber 120 in the axial direction of the tank body 100 can be changed, and can be adjusted according to the size requirements of the flow regulating chamber 110 and the high-pressure energy storage chamber 120.

[0075] Specifically, in areas with relatively stable municipal water supply, during peak water usage periods, when the liquid level in the flow regulating chamber 110 is lower than the first preset value, the difference between the outflow and inflow of the flow regulating chamber 110 is small, and there is no need for the high-pressure energy storage chamber 120 to supplement the water supply. In this case, a larger flow regulating chamber 110 and a smaller high-pressure energy storage chamber 120 can be installed. Conversely, in areas with poor municipal water supply, during peak water usage periods, when the liquid level in the flow regulating chamber 110 is lower than the first preset value, the difference between the outflow and inflow of the flow regulating chamber 110 is large, requiring a large supplementary water supply from the high-pressure energy storage chamber 120. In this case, a smaller flow regulating chamber 110 and a larger high-pressure energy storage chamber 120 can be installed.

[0076] In one possible implementation, the first partition assembly 500 includes a guide 510, a partition 520, and a locking member 530. The guide 510 is disposed on the inner wall of the tank 100. The partition 520 is slidably connected to the guide 510. The locking member 530 is disposed on the partition 520 for locking the partition 520 onto the guide 510.

[0077] The guide member 510 is used to guide the movement of the partition 520, which is used to separate the flow regulating chamber 110 and the high-pressure energy storage chamber 120. The locking member 530 is used to lock the partition 520 on the guide member 510 so that the position of the partition 520 relative to the tank 100 remains unchanged.

[0078] For example, the guide member 510 can be configured as a guide rod, with one guide rod on each of the radially horizontal sides inside the tank 100. Each end of the guide rod has a support, and the guide rod is mounted on the inner wall of the tank 100 via the supports. The supports can be bolted to the inner wall of the tank 100. The locking member 530 is a sleeve-shaped component fitted onto the guide rod and equipped with a bolt. The bolt is threadedly connected to the locking member 530. A positioning hole can be provided on the guide rod so that when the bolt is tightened, it can enter the positioning hole, thereby locking the locking member 530 to the guide rod. The partition plate 520 has a through hole, and part of the locking member 530 passes through the through hole. The guide rod passes through the locking member 530, and the locking member 530 seals the gap between the through hole wall and the guide rod.

[0079] In one possible implementation, the first partition assembly 500 further includes a seal 540 that seals between the partition 520 and the inner wall of the tank 100.

[0080] By setting the sealing element 540, the gap between the partition 520 and the inner wall of the tank 100 can be sealed, thereby isolating the flow regulating chamber 110 from the high-pressure energy storage chamber 120.

[0081] For example, the seal 540 can be configured as an annular shape with a U-shaped cross-section, the opening of the U-shape facing inward, so that the circumferential edge of the partition 520 can be inserted into the U-shaped opening of the seal 540, and the end of the seal 540 facing away from the opening abuts against the inner wall of the tank 100.

[0082] The seal 540 can be made of rubber, silicone rubber, polytetrafluoroethylene-coated elastomer, or wear-resistant elastic composite material to adapt to working environments involving long-term immersion in water and pressure fluctuations. In terms of size and proportion, the cross-sectional dimensions of the seal 540 are typically slightly larger than the assembly gap between the partition 520 and the inner wall of the tank 100, so that it forms a pre-compressed state after assembly. The compression of the seal 540 can be controlled between 5% and 30% of its original thickness.

[0083] In one possible implementation, the seal 540 has an extension 541 extending axially along the tank body 100, the extension 541 conforming to the inner wall of the tank body 100.

[0084] By providing an extension 541 that fits against the inner wall of the tank 100, the sealing continuity and guiding stability of the seal 540 during axial movement can be improved. This extension 541 is used to increase the sealing contact length, reduce the risk of localized leakage caused by axial movement of the partition 520, and enhance the seal 540's adaptability to shape errors of the inner wall of the tank 100.

[0085] The extension 541 extends forward and backward along the axis of the tank 100, forming a long strip-shaped contact area with the inner wall of the tank 100. The extension 541 can be a single-lip, double-lip, corrugated, or skirt-shaped structure. The material can be integrally molded with the same material as the main body of the seal 540, or it can be a composite structure of hard and soft materials or a composite structure of wear-resistant outer layer and elastic inner layer.

[0086] Reference Figure 1 , Figure 2 and Figure 4 As shown, in one possible implementation, the secondary water supply system further includes a second separation component 600, with the water storage chamber 131 adjacent to the high-pressure energy storage chamber 120. The second separation component 600 includes a second elastic diaphragm 610 separating the high-pressure energy storage chamber 120 and the water storage chamber 131.

[0087] The second elastic diaphragm 610 is disposed between adjacent cavities to achieve elastic isolation between the pre-pressure balance cavity 130 and the high-pressure energy storage cavity 120. It adapts to the volume change between the water storage cavity 131 and the high-pressure energy storage cavity 120 by deforming under pressure.

[0088] In practice, the higher the inflation pressure of the airbag 300, the higher the pressure inside the high-pressure energy storage chamber 120, and the greater the degree to which water and gas compress the second elastic diaphragm 610. Consequently, the volume of the water storage chamber 131 in the pre-pressure balance chamber 130 will decrease, and the volume of the high-pressure energy storage chamber 120 will increase.

[0089] Taking two scenarios as examples, the first scenario is that the water pressure at the water supply end in the water supply area is relatively low. Therefore, the need to absorb water supply fluctuations during normal water supply is also relatively small. However, the need for pressure and water replenishment is stronger during peak water usage periods. In this case, a larger air pressure can be injected into the airbag 300, which can be adapted to the smaller pre-pressure balancing chamber 130 and the larger high-pressure energy storage chamber 120. The second scenario is that the water pressure at the water supply end is relatively high, and the need for pressure and water replenishment during peak water usage periods is relatively weak. Therefore, a smaller air pressure can be injected into the airbag 300 to save energy and leave a larger volume for the water storage chamber 131 to absorb regular water supply fluctuations and serve as an auxiliary water storage container for the flow regulation chamber 110.

[0090] For example, the ratio between the pre-pressure balancing chamber 130, the high-pressure energy storage chamber 120 and the flow regulating chamber 110 is 1:(0.8-1.2):(0.5-0.8), the deformation of the second elastic diaphragm 610 in the axial direction of the tank 100 is not less than 50mm, and the pressure range in the high-pressure energy storage chamber 120 is 0.4MPa-0.8MPa.

[0091] In one possible implementation, the second partition assembly 600 further includes a mounting member 620, and a mounting fitting member 104 is provided on the inner wall of the tank body 100. When the mounting member 620 is connected to the mounting fitting member 104, the mounting member 620 and the mounting fitting member 104 together clamp the peripheral edge of the second elastic diaphragm 610.

[0092] Mounting component 620 is a clamping connection component used to cooperate with mounting fitting component 104 on the inner wall of tank 100 to fix the peripheral edge of the second elastic diaphragm 610 to a predetermined position on the inner wall of tank 100. Its function is to form circumferential limiting and axial compression on the outer periphery of the second elastic diaphragm 610, so that the second elastic diaphragm 610 maintains a stable boundary state when it is under long-term pressure between the high-pressure energy storage chamber 120 and the water storage chamber 131.

[0093] The mounting fitting 104 is disposed on the inner wall of the tank 100, located at the periphery of the boundary between the high-pressure energy storage chamber 120 and the water storage chamber 131. During assembly, the mounting fitting 620 is fitted or pressed against the mounting fitting 104, so that the edge of the second elastic diaphragm 610 is sandwiched between the two, thereby forming a reliable interface for fixing, sealing and force transmission, reducing the possibility of edge movement, local warping or detachment of the second elastic diaphragm 610 during repeated pressure changes.

[0094] For example, the mounting fitting 104 can be an annular protrusion welded to the inner wall of the tank 100, and the mounting fitting 620 is an annular flange with holes. During installation, the second elastic diaphragm 610 is pressed onto the mounting fitting 104 using the mounting fitting 620, and then bolts are used to pass through the flange holes on the mounting fitting 620 and tighten them onto the mounting fitting 104, so that the mounting fitting 620 can press the second elastic diaphragm 610.

[0095] In one possible implementation, the control component 400 includes a first level gauge 410, a second level gauge 420, a first valve 430, a second valve 440, and a control unit. The first level gauge 410 is located in the flow regulating chamber 110 and is used to detect a first level value within the flow regulating chamber 110. The second level gauge 420 is located in the high-pressure energy storage chamber 120 and is used to detect a second level value within the high-pressure energy storage chamber 120. The first valve 430 is located between the high-pressure energy storage chamber 120 and the outlet 101 and is used to restrict the flow of liquid between the high-pressure energy storage chamber 120 and the outlet 101. The second valve 440 is located between the water storage chamber 131 and the outlet 101 and is used to restrict the flow of liquid between the water storage chamber 131 and the outlet 101. The first level gauge 410, the second level gauge 420, the first valve 430, and the second valve 440 are all electrically connected to the control unit.

[0096] The control unit is configured to control the first valve 430 to open and the second valve 440 to close when the first liquid level value is less than or equal to the first preset value, and to control the first valve 430 to close and the second valve 440 to open when the second liquid level value is greater than or equal to the second preset value, wherein the second preset value is greater than the first preset value.

[0097] The first level gauge 410 converts the liquid level status of the flow regulating chamber 110 into an electrical signal that can be recognized by the control unit, thereby providing a basis for determining the water supply path switching. The second level gauge 420 converts the liquid level status of the high-pressure energy storage chamber 120 into an electrical signal that can be recognized by the control unit, thereby providing a basis for determining the water supply path switching, so as to promptly determine whether the water supply capacity of the high-pressure energy storage chamber 120 has recovered to the preset level after it participates in water supply. The first valve 430 and the second valve 440 are both electric valves. The control unit, which is electrically connected to the first level gauge 410, the second level gauge 420, the first valve 430, and the second valve 440, is a control core that is typically used to receive liquid level signals, compare preset thresholds, and output valve drive signals. Its purpose is to coordinate the water supply relationship between the flow regulating chamber 110, the high-pressure energy storage chamber 120, and the water storage chamber 131 to maintain the continuity of the system's water supply.

[0098] For example, the first level gauge 410 and the second level gauge 420 are respectively installed on the upper part of the corresponding cavity, and can be in the form of ultrasonic level gauges. The first valve 430 and the second valve 440 can be in the form of solenoid valves, butterfly valves, ball valves or gate valves. The first valve 430 is set on the second pipe 106, and the second valve 440 is set on the third pipe 107. The control unit can be a programmable logic controller (PLC), a microcontroller control board or an industrial computing module, and can be used with relays, contactors or valve drivers to form a complete execution circuit. When the tank 100 is a horizontal cylindrical shape, the range of the second preset value is 80%-90% of the diameter of the tank 100, and the specific value can be 80%, 82%, 85%, 88%, 90%, etc.

[0099] When the secondary water supply system is working, the control unit collects the level signals output by the first level gauge 410 and the second level gauge 420, and determines whether the first preset value has been reached based on the first level value of the flow regulating chamber 110. When the first level value is less than or equal to the first preset value, the control unit immediately issues a drive command to open the first valve 430 and close the second valve 440, thereby connecting the high-pressure energy storage chamber 120 with the outlet 101, allowing the high-pressure energy storage chamber 120 to supply water to the outlet 101 under the action of compressed gas from the air bladder 300. As the peak water usage period ends, the inflow of water into the flow regulating chamber 110 exceeds the outflow, and the levels in both the flow regulating chamber 110 and the high-pressure energy storage chamber 120 rise. When the second level value rises back to greater than or equal to the second preset value, the control unit then controls the first valve 430 to close and the second valve 440 to open, switching the water supply path back to the state where the water storage chamber 131 is connected to the outlet 101, and the water storage chamber 131 resumes its normal water supply function.

[0100] With this configuration, the secondary water supply system can quickly switch to the high-pressure energy storage chamber 120 to supply water when the liquid level in the flow regulating chamber 110 is insufficient, and then switch back to the water storage chamber 131 to supply water after the high-pressure energy storage chamber 120 recovers to the preset liquid level. This alleviates the frequent start-stop or long-term high-load operation of the pump unit due to instantaneous flow fluctuations, reduces pressure fluctuations and water hammer risks, and improves the continuous water supply capacity and operational stability of the secondary water supply system under peak water demand conditions.

[0101] In one possible implementation, the secondary water supply system further includes an inflation device 800 connected to the airbag 300, and a vacuum suppressor 700 connected to the high-pressure energy storage chamber 120. The control component 400 also includes a pressure sensor 900 for detecting the air pressure in the high-pressure energy storage chamber 120. The vacuum suppressor 700, the inflation device 800, and the pressure sensor 900 are all electrically connected to the control unit.

[0102] The control unit is configured to control the vacuum suppressor 700 to close and control the inflation device 800 to inflate the airbag 300 when the second liquid level value is greater than or equal to the second preset value and the first valve 430 is closed, and to control the inflation device 800 to deflate the airbag 300 when the pressure value measured by the pressure sensor 900 is less than the preset pressure value.

[0103] When the high-pressure energy storage chamber 120 has been supplied with water for an extended period, and the pressure sensor 900 detects that the pressure value inside the air bladder 300 is less than the third preset value, it indicates that the air pressure inside the air bladder 300 is insufficient and the water level in the high-pressure energy storage chamber 120 is also low. The control unit then controls the inflation device 800 to deflate the air bladder 300, so as to leave more space in the high-pressure energy storage chamber 120 for subsequent water intake. When the water intake in the flow regulating chamber 110 is greater than the water output, the water level in the flow regulating chamber 110 rises, and the high-pressure energy storage chamber 120 and the flow regulating chamber 110 form a communicating vessel, and the high-pressure energy storage chamber 120 begins to be replenished with water. When the high-pressure energy storage chamber 120 is replenished with water, the control unit first judges based on the second liquid level value fed back by the second liquid level gauge 420 and the opening and closing status of the first valve 430. When the second liquid level value is greater than or equal to the second preset value and the first valve 430 is closed, it indicates that the liquid level in the high-pressure energy storage chamber 120 meets the energy storage conditions and that no liquid supply path has been established between it and the water outlet 101. At this time, the control unit first controls the vacuum suppressor 700 of the high-pressure energy storage chamber 120 to close, and then controls the inflation device 800 to inflate the air bag 300, so that the air in the high-pressure energy storage chamber 120 returns to the set pressure.

[0104] The preset pressure value can be designed according to the actual layout. For example, when the liquid level in the high-pressure energy storage chamber 120 is 40%, the pressure inside the high-pressure energy storage chamber 120 can be measured and set as the preset pressure value.

[0105] Based on the above introduction, the secondary water supply system can actively compensate for the pressure of the airbag 300 when the high-pressure energy storage chamber 120 is at a stable liquid level, and adjust its working state in a timely manner when the pressure of the airbag 300 is too low. This avoids the formation of an abnormal vacuum inside the energy storage chamber, reduces the impact of the pressure decay of the airbag 300 on the stability of water supply, and thus improves the energy storage efficiency, operational safety, and overall water supply continuity of the secondary water supply system under conditions of frequent start-stop and large flow fluctuations.

[0106] In addition, a vacuum suppressor 700 and a pressure sensor 900 can be installed in both the water storage chamber 131 and the flow regulating chamber 110. Both the vacuum suppressor 700 and the pressure sensor 900 are electrically connected to the control unit to prevent negative pressure from occurring in the water storage chamber 131 and the flow regulating chamber 110 during water discharge. The inlet 102 is also equipped with a third valve 450, which is electrically connected to the control unit. When the liquid level in the flow regulating chamber 110 is close to the top of the tank 100, the control unit, based on the liquid level signal from the first level gauge 410, controls the third valve 450 to close to prevent water from overflowing from the tank 100. When the water level in the flow regulating chamber 110 decreases, the control unit opens the third valve 450. The control unit can control the opening degree of the first valve 430, the second valve 440, and the third valve 450 to change the corresponding water flow rate. The control unit is electrically connected to the water pump unit 200. When the liquid level in the flow regulating chamber 110 is lower than 10% of the diameter of the tank 100, the water pump unit 200 will be shut down.

[0107] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure 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 embodiments are to be considered exemplary only.

[0108] 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.

Claims

1. A secondary water supply system, characterized in that, include: The tank (100) is provided with a flow regulating chamber (110) and a high-pressure energy storage chamber (120). The tank (100) is provided with an outlet (101) and an inlet (102) for connecting to the water supply end. The inlet (102) and the outlet (101) are both connected to the flow regulating chamber (110). A water pump unit (200) has its suction port connected to the outlet (101). An airbag (300) is disposed in the high-pressure energy storage chamber (120) and is filled with compressed gas. A control component (400) is configured to connect the high-pressure energy storage chamber (120) to the outlet (101) when the liquid level in the flow regulating chamber (110) is less than or equal to a first preset value, so that the high-pressure energy storage chamber (120) supplies water to the outlet (101).

2. The secondary water supply system according to claim 1, characterized in that, The tank (100) is also provided with a pre-pressure balancing chamber (130), and the pre-pressure balancing chamber (130) is provided with a first elastic diaphragm (103), which divides the pre-pressure balancing chamber (130) into a water storage chamber (131) and a pressure chamber (132). The control component (400) is configured to connect the water storage chamber (131) and the water outlet (101) when the high-pressure energy storage chamber (120) is disconnected from the water outlet (101).

3. The secondary water supply system according to claim 2, characterized in that, It also includes a first separation assembly (500) for separating the flow regulating chamber (110) and the high-pressure energy storage chamber (120), the first separation assembly (500) being axially adjustable in position on the tank body (100).

4. The secondary water supply system according to claim 3, characterized in that, The first separating component (500) includes: A guide (510) is provided on the inner wall of the tank (100); Partition (520), said partition (520) being slidably connected to the guide (510); A locking member (530) is provided on the partition (520) for locking the partition (520) onto the guide member (510).

5. The secondary water supply system according to claim 4, characterized in that, The first partition assembly (500) further includes a seal (540) that seals between the partition (520) and the inner wall of the tank (100).

6. The secondary water supply system according to claim 5, characterized in that, The seal (540) has an extension (541) extending axially along the tank body (100) and the extension (541) conforming to the inner wall of the tank body (100).

7. The secondary water supply system according to claim 2, characterized in that, It also includes a second separation component (600), wherein the water storage chamber (131) is adjacent to the high-pressure energy storage chamber (120), and the second separation component (600) includes a second elastic diaphragm (610) separating the high-pressure energy storage chamber (120) and the water storage chamber (131).

8. The secondary water supply system according to claim 7, characterized in that, The second separation component (600) also includes a mounting component (620), and an mounting fitting component (104) is provided on the inner wall of the tank (100). When the mounting component (620) is connected to the mounting fitting component (104), the mounting component (620) and the mounting fitting component (104) together clamp the peripheral edge of the second elastic diaphragm (610).

9. The secondary water supply system according to any one of claims 2-8, characterized in that, The control component (400) includes: The first liquid level gauge (410) is disposed in the flow regulating cavity (110) and is used to detect the first liquid level value in the flow regulating cavity (110); The second liquid level gauge (420) is installed in the high-pressure energy storage chamber (120) and is used to detect the second liquid level value in the high-pressure energy storage chamber (120); The first valve (430) is located between the high-pressure energy storage chamber (120) and the water outlet (101) to restrict the flow of liquid between the high-pressure energy storage chamber (120) and the water outlet (101). The second valve (440) is located between the water storage chamber (131) and the water outlet (101) and is used to restrict the flow of liquid between the water storage chamber (131) and the water outlet (101). The control unit is electrically connected to the first level gauge (410), the second level gauge (420), the first valve (430), and the second valve (440). The control unit is configured to control the first valve (430) to open and the second valve (440) to close when the first liquid level value is less than or equal to the first preset value, and to control the first valve (430) to close and the second valve (440) to open when the second liquid level value is greater than or equal to the second preset value, wherein the second preset value is greater than the first preset value.

10. The secondary water supply system according to claim 9, characterized in that, It also includes an inflation device (800) connected to the airbag (300) and a vacuum suppressor (700) connected to the high-pressure energy storage chamber (120). The control assembly (400) also includes a pressure sensor (900) for detecting the air pressure in the high-pressure energy storage chamber (120). The vacuum suppressor (700), the inflation device (800) and the pressure sensor (900) are all electrically connected to the control unit. The control unit is configured to control the vacuum suppressor (700) to close and control the inflation device (800) to inflate the airbag (300) when the second liquid level value is greater than or equal to the second preset value and the first valve (430) is closed, and to control the inflation device (800) to deflate the airbag (300) when the pressure value measured by the pressure sensor (900) is less than the preset pressure value.

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