Water pump water supply system

Abstract

This invention relates to the field of water supply technology and discloses a water pump supply system, including water supply zones, pump sets, water supply components, and control components. There are M water supply zones, including zones G1, G2, ..., GM, with the head relationship between the zones satisfying: HG1 < HG2 < ... < HGM. There are M pump sets, each including at least one pump, and each pump can be connected to all M water supply zones. The M pump sets include pump set A, pump set B, ..., pump set M, with the head relationship between the M pump sets satisfying: hA < hB < ... < hM. The water pump supply system provides a corresponding pump set for each water supply zone. All pump sets have multiple pumps that can be connected to all M water supply zones, enabling coordinated flow supply between different water supply zones operating in parallel. This allows each pump to freely switch between multiple water supply zones with different head requirements, ensuring that it always meets the water supply and head requirements and always operates in its high-efficiency range, thus saving water supply energy.

Description

Technical Field

[0001] This invention relates to the field of water supply technology, and more particularly to a water pump water supply system. Background Technology

[0002] To meet the water supply needs of high-rise buildings, their water supply systems are generally set up according to the water supply height. Secondary water supply equipment is set up for the middle and high-rise buildings, and the different zones are not interconnected. Although this can solve the water supply problem of high-rise buildings, the different water supply zones operating in parallel cannot coordinate the flow of water. This results in problems such as high investment and energy inefficiency when supplying water at low flow rates. This is especially prominent in the high-rise zones where high-head, high-power water pumps are used, resulting in low efficiency and high energy consumption under low flow conditions.

[0003] Therefore, a water pump supply system is urgently needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a water pump water supply system that can effectively save water supply energy consumption.

[0005] Based on the above concept, the technical solution adopted by this invention is as follows:

[0006] A water pump supply system includes:

[0007] There are M water supply zones, including zone G1, zone G2, ..., zone GM. The head relationship of the water supply zones satisfies: HG1 < HG2 < ... < HGM.

[0008] There are M pump sets, each of which includes at least one water pump, and the water pump of each pump set can be connected to the M water supply areas. The M pump sets include pump set A, pump set B... pump set M, and the head relationship of the M pump sets satisfies: hA < hB < ... < hM.

[0009] A water supply assembly is located at the end of the main water supply pipe of the water supply area. The water supply assembly includes a first pressure tank and a first check valve. The first pressure tank is used to supply water to the water supply area when the water supply pipe is at a preset pressure or a preset flow rate. The first check valve is used to prevent water from flowing back through the first pressure tank.

[0010] A control component, which is electrically connected to the pump set and the water supply component.

[0011] Optionally, the maximum design flow rate of the water supply area is Qmax, the minimum design flow rate is Qmin, the average design flow rate is Qp, and the flow rate of the pumps in the pump group of the water supply area is qp. Each pump group includes a pre-selected pump, and the flow rate of the pre-selected pump satisfies: q1p = Qmax, q2p = Qp, q3p = Qmin, and q1p ≠ q2p ≠ q3p, or q1p ≈ q2p ≈ q3p, or only q1p ≈ q2p, or only q2p ≈ q3p, or only q1p ≈ q3p;

[0012] The head of the water supply area is H, the head of the pump group is h, and the head of the initially selected pumps in each pump group satisfies: h1=h2=h3. The minimum head of the pumps in the M pump groups is hxmin, and the maximum head is hxmax. The head of the G1 area is HG1, the head of the GM area is HGM, hxmin≈HG1, and hxmax≈HGM.

[0013] Optionally, the working efficiency of the water pump is η, and η1=η3≤η≤η2. When the working efficiency of the water pump is η1, the head of the water pump is hmin and the flow rate of the water pump is qmax. When the working efficiency of the water pump is η2, the head of the water pump is h and the flow rate of the water pump is qp. When the working efficiency of the water pump is η3, the head of the water pump is hmax and the flow rate of the water pump is qmin.

[0014] The design flow rate of the water supply area satisfies: [Qmin, Qmax] = [q3min, q3max) ∪ [q2min, q2max) ∪ [q1min, q1max], and q3max = q2min, q2max = q1min, q3min = Qmin, q1max = Qmax.

[0015] Optionally, each of the pump sets further includes a supplementary water pump with a flow range of [qnmin, qnmax]. The design flow of the water supply area satisfies: [Qmin, Qmax] = [q3min, q3max) ∪ [q2min, q2max) ∪ [q1min, q1max) ∪ [qnmin, qnmax].

[0016] Optionally, the water supply assembly further includes a water supply branch pipe and a water supply valve. The water supply branch pipe is connected in parallel at the end of the main water supply pipe, and the first check valve, the first pressure tank and the water supply valve are sequentially arranged on the water supply branch pipe.

[0017] The water supply assembly further includes a first pressure switch, which is disposed on the main water supply pipe and located downstream of the water supply valve; or the water supply assembly further includes a first flow switch, which is disposed on the main water supply pipe and located downstream of the water supply valve.

[0018] Optionally, a water supply area includes multiple water supply branches arranged in parallel, one water supply branch is an end of the main water supply pipe, one water supply branch has one water supply assembly, and the first pressure tanks of the multiple water supply assemblies are connected.

[0019] Optionally, the pump set further includes M second pressure switches, each of which is respectively installed on the main water supply pipe of one of the M water supply zones, and all M second pressure switches are electrically connected to the control component; or

[0020] The pump set also includes M second flow switches, which are respectively installed on the main water supply pipes of the M water supply areas, and all M second flow switches are electrically connected to the control component.

[0021] Optionally, the water pump supply system further includes a second pressure tank, which is used to buffer the flow and pressure in the main water supply pipe when the pump group switches.

[0022] Optionally, the pump set further includes multiple regulating valves and multiple water supply pipes. One water pump is connected to the main water supply pipe through one of the water supply pipes, and one regulating valve is installed on each of the water supply pipes. Each regulating valve is electrically connected to the control component.

[0023] Optionally, all pumps are industrial frequency pumps; or

[0024] Multiple water pumps include both fixed-frequency pumps and variable-frequency pumps.

[0025] The beneficial effects of this invention are as follows:

[0026] The water pump supply system proposed in this invention includes water supply zones, pump sets, water supply components, and control components. There are M water supply zones, including zones G1, G2, ..., GM. The head relationship among the water supply zones satisfies: HG1 < HG2 < ... < HGM. There are M pump sets, each including at least one pump, and each pump set can connect to all M water supply zones. The M pump sets include pump set A, pump set B, ..., pump set M. The head relationship among the M pump sets satisfies: hA < hB < ... < hM. This water pump supply system sets up a pump set for each water supply zone, and all pump sets can connect to all M water supply zones. This allows for coordinated flow regulation between different water supply zones operating in parallel, enabling each pump to freely switch between multiple water supply zones with different head requirements, ensuring that it always meets the water supply and head requirements and always operates in its high-efficiency range, thereby saving water supply energy. The first pressure tank and the first check valve installed at the end of the main water supply pipe in the water supply area can supply water to the water supply area when the water supply pipe is at a preset pressure or preset flow rate, so as to avoid frequent start and stop of the water pump and prevent backflow of water through the first pressure tank, thereby achieving energy saving effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the water pump water supply system provided in an embodiment of the present invention;

[0028] Figure 2 This is a characteristic curve diagram of the water pump provided in an embodiment of the present invention;

[0029] Figure 3 This is a selection diagram of the water pump provided in an embodiment of the present invention;

[0030] Figure 4 This is a flowchart of the operation of the water pump water supply system provided in the embodiment of the present invention.

[0031] In the picture:

[0032] 1. Water supply area; 11. G1 area; 12. G2 area; 13. G3 area; 101. Main water supply pipe; 102. Branch water supply pipe;

[0033] 2. Pump set; 21. Pump set A; 22. Pump set B; 23. Pump set C; 24. Second pressure switch; 201. First water supply pipe; 2011. First regulating valve; 202. Second water supply pipe; 2021. Second regulating valve; 203. Third water supply pipe; 2031. Third regulating valve;

[0034] 3. Water supply components; 31. Water supply branch pipe; 32. Water supply valve; 33. First pressure tank; 34. First check valve; 35. First flow switch;

[0035] 4. Second pressure tank. Detailed Implementation

[0036] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1As shown, this embodiment provides a water pump supply system, including water supply zones 1 and pump sets 2. The water supply zones 1 are configured with M units, including zones G11, G212…GM1, where the head ratio of each water supply zone 1 satisfies: HG1 < HG2 < … < HGM. The pump sets 2 are configured with M units, including pump set A21, pump set B22…Pump set M, where the head ratio of each pump set 2 satisfies: HA < HB < … < HM. Each pump set 2 includes at least one water pump, and each pump in each pump set 2 can be connected to one of the M water supply zones 1. Based on this, by selecting the appropriate pumps for each water supply zone 1 corresponding to the pump group 2, these multiple pumps can operate not only in their corresponding water supply zone 1 but also in other water supply zones 1. This allows for coordinated flow regulation between the different water supply zones 1 operating in parallel, enabling each pump to freely switch between multiple water supply zones 1 with different heads. This ensures that the pumps always meet the water supply and head requirements and always operate in their high-efficiency range, thereby saving water supply energy. The selection of pumps will be described in detail below, and the specific number of pumps included in each pump group 2 is also related to its selection criteria.

[0042] In addition, a water supply assembly 3 is installed at the end of the main water supply pipe 101 in water supply area 1. The water supply assembly 3 includes a first pressure tank 33 and a first check valve 34. The first pressure tank 33 is used to supply water to water supply area 1 when the pressure or flow rate in the main water supply pipe 101 is at a preset value. That is, the first pressure tank 33 can form a pressurized water supply to the corresponding area of ​​the pipe network. Its supply is determined according to the user's water consumption and the operating conditions of the pipe network pumps. Water is supplied by the first pressure tank 33 only when the pressure or flow rate in the main water supply pipe 101 is less than the preset value, and water is supplied by the pump when it is not less than the preset value. In specific implementation, when the flow rate required by water supply area 1 is less than the preset value, water is supplied by the first pressure tank 33. That is, below this preset value, the water supply demand of water supply area 1 can be met by the water supply through the first pressure tank 33, so there is no need to start the pump unit 2. When the pressure or flow rate in the main water supply pipe 101 exceeds the preset value, meaning that the water supply through the first pressure tank 33 is insufficient to meet the water supply needs of water supply zone 1, the pump unit 2 is activated. This setting reduces the number of pump start-ups and shutdowns. The first check valve 34 prevents backflow of water through the first pressure tank 33, preventing water delivered to the high zone from flowing back to the low zone, thus avoiding repeated up-and-down flow and energy consumption, thereby achieving energy saving. The water pump supply system also includes a control component, which is electrically connected to the pump unit 2 and the water supply component 3 to automatically adjust the water supply from different pumps in the pump unit 2 to different water supply zones 1, and to automatically replenish the water supply from the pipeline network using the water supply component 3.

[0043] Specifically, the water supply assembly 3 also includes a water supply branch pipe 31 and a water supply valve 32. The water supply branch pipe 31 is connected in parallel at the end of the main water supply pipe 101. The first check valve 34, the first pressure tank 33, and the water supply valve 32 are sequentially installed on the water supply branch pipe 31. The automatic water replenishment of the first pressure tank 33 to the water supply area 1 is achieved by a first pressure switch or a first flow switch 35 installed on the main water supply pipe 101. (Refer to...) Figure 1 A first flow switch 35 is installed on the main water supply pipe 101 and located downstream of the water supply valve 32. Both the first flow switch 35 and the water supply valve 32 are electrically connected to the control component, so that the control component can control the opening and closing of the water supply valve 32 according to the signal fed back by the first flow switch 35. Similarly, a first pressure switch is installed on the main water supply pipe 101 and located downstream of the water supply valve 32. Both the first pressure switch and the water supply valve 32 are electrically connected to the control component, so that the control component can control the opening and closing of the water supply valve 32 according to the signal fed back by the first pressure switch. Preferably, the water supply component 3 further includes a second check valve, which is installed between the first pressure tank 33 and the water supply valve 32. The second check valve is used to prevent backflow of water from the first pressure tank 33 into the water supply area 1.

[0044] Optionally, a water supply zone 1 includes multiple water supply branches 102, which are connected in parallel. Each water supply branch 102 is an end of the main water supply pipe 101, meaning each water supply branch 102 has a water supply component 3. Each water supply component 3 can replenish water to its corresponding water supply branch 102, thereby reducing the switching frequency of water pumps in the water supply system and achieving energy saving. Preferably, the first pressure tanks 33 of the multiple water supply components 3 are connected. That is, when a water supply branch 102 is in a low-water-supply period, it can not only replenish water using the first pressure tank 33 on that water supply branch 102, but also supply water to users from the first pressure tanks 33 on other connected water supply branches 102 after the water stored in its corresponding first pressure tank 33 is consumed. Based on this, the water pump is only started after all the water stored in the first pressure tanks 33 of the same water supply zone 1 has been consumed, which can further reduce the number of water pump start-ups and shutdowns. Preferably, the first pressure tank 33 has an inlet pressure switch, which is a component inherent in existing pressure tanks. This switch automatically replenishes the pressure tank by detecting the pressure inside. Alternatively, in other embodiments, the first pressure tank 33 can be replaced with a gravity or pressure water supply mechanism located at a certain height (e.g., 5m-11m) above the water supply branch 102. This mechanism can still automatically replenish the water supply branch 102 via feedback signals from the first flow switch 35 or the first pressure switch.

[0045] Further emphasis should be placed on the selection of multiple pumps included in pump group 2. The selection of these pumps must be based on the flow rate of their corresponding water supply area 1. Firstly, the maximum design flow rate Qmax, minimum design flow rate Qmin, and average design flow rate Qp for each water supply area 1 can be obtained through standard calculations, experience, or measured flow data. Based on this, for the same water supply area 1, pumps can be initially selected according to the aforementioned three flow rate values. If the flow rate of the pump in pump group 2 is qp, then the flow rates of these initially selected pumps satisfy: q1p = Qmax, q2p = Qp, q3p = Qmin. The head of water supply area 1 is H, and the head of pump group 2 is h. The heads of the initially selected pumps in the same pump group 2 are consistent, meaning the heads of the initially selected pumps in each pump group 2 satisfy: h1 = h2 = h3. In addition, the minimum head of the pumps in the M pump groups 2 is hxmin, and the maximum head is hxmax. The head of the pumps in the G1 area 11 is HG1, and the head of the GM area is HGM. hxmin≈HG1, hxmax≈HGM. As mentioned above, the head relationship of the M pump groups satisfies: hA<hB<…<hM, that is, hA≈HG1, hM≈HGM. Furthermore, the flow rates of the initially selected pumps include the following scenarios: First, q1p≠q2p≠q3p, meaning the flow rates of the three pumps are different, and the initial selection includes all three pumps, i.e., the first round of pump selection chooses three pumps. Second, q1p≈q2p≈q3p, meaning the flow rates of the three pumps are the same, and the initial selection includes only one pump, i.e., the first round of pump selection chooses only one pump. Third, only q1p≈q2p, only q2p≈q3p, or only q1p≈q3p, meaning only any two of the three pumps have the same flow rate, and the initial selection includes two pumps, i.e., the first round of pump selection chooses only two pumps. In this embodiment, q1p≈q2p means that the flow rate ranges of q1p±10% and q2p±10% overlap, and the same logic applies to q2p≈q3p, q1p≈q3p, and q1p≈q2p≈q3p. In other embodiments, the flow rate range of the water pump may not be limited to ±10%, but may also be ±5%, ±8%, etc.

[0046] Furthermore, the water pump is configured based on its operating efficiency, denoted by η, where η1 = η3 ≤ η ≤ η2. η1 and η2 are initial values ​​given by the designer during the initial pump selection process. If subsequent pump selection within this range does not meet the requirements, the given operating efficiency can be adjusted for re-selection. Specifically, when the pump's operating efficiency is η1, the pump head is hmin and the flow rate is qmax; when the pump's operating efficiency is η2, the pump head is h and the flow rate is qp; and when the pump's operating efficiency is η3, the pump head is hmax and the flow rate is qmin. The design flow rate of water supply zone 1 satisfies: [Qmin, Qmax]=[q3min, q3max)∪[q2min, q2max)∪[q1min, q1max], and q3max=q2min, q2max=q1min, q3min=Qmin, q1max=Qmax, that is, the water supply interval of each water supply zone 1 should be completely covered by the flow intervals of the selected multiple water pumps.

[0047] In this embodiment, refer to Figure 1 For buildings requiring water supply, the buildings are divided into several water supply zones 1 along the building height according to the number of floors. For example, for a building with 33 floors, this embodiment divides it into three water supply zones 1: floors 1-11 are zone G1 11, floors 12-22 are zone G2 12, and floors 23-33 are zone G3 13. Then HG1 < HG2 < HG3. The pump set 2 also includes three sets, namely pump set A21, pump set B22 and pump set C23. Pump set A21 has three A pumps, namely A1 pump, A2 pump and A3 pump; pump set B22 has three B pumps, namely B1 pump, B2 pump and B3 pump; and pump set C23 has three C pumps, namely C1 pump, C2 pump and C3 pump.

[0048] For example, in this embodiment, G2 zone 12 corresponds to pump group B22. When selecting pumps B22, the maximum design flow rate Q2max, minimum design flow rate Q2min, and average design flow rate Q2p of G2 zone 12 are used as a reference to select the flow rates qB1p for pump B1, qB2p for pump B2, and qB3p for pump B3. (Refer to...) Figure 2The characteristic curves of the water pumps (h / η / NQ curves) are shown below. For pump B1, when the operating efficiency is η1, the corresponding flow rate is qB1max; when the operating efficiency is η2, the corresponding flow rate is qB1p; and when the operating efficiency is η3, the corresponding flow rate is qB1min. For pump B2, when the operating efficiency is η1, the corresponding flow rate is qB2max; when the operating efficiency is η2, the corresponding flow rate is qB2p; and when the operating efficiency is η3, the corresponding flow rate is qB2min. For pump B3, when the operating efficiency is η1, the corresponding flow rate is qB3max; when the operating efficiency is η2, the corresponding flow rate is qB3p; and when the operating efficiency is η3, the corresponding flow rate is qB3min. The design flow rates of pumps B1, B2, and B3 in pump group B and their corresponding design flow rates in zone G2 12 satisfy: [Q2min, Q2max] = [qB3min, qB3max) ∪ [qB2min, qB2max) ∪ [qB1min, qB1max], and qB3max = qB2min, qB2max = qB1min, qB3min = Q2min, qB1max = Q2max. When the operating flow rate of the pump changes by ±10%, that is, the ranges of qB3max ±10% and qB2min ±10% overlap. In this embodiment, since the initially selected pumps cannot meet the full flow coverage of water supply zone 1, supplementary pumps are also selected, which will be further described below.

[0049] The selection of pumps for pump group A21 corresponding to area G1 11 and pump group C23 corresponding to area G3 13 also follows the above method. Ultimately, it should be ensured that the pumps selected for each water supply area 1 have the same head, i.e., hA1 = hA2 = hA3, hB1 = hB2 = hB3, hC1 = hC2 = hC3. Furthermore, among multiple pumps, the maximum head hxmax, minimum head hxmin, and average head hxp should satisfy: HG1 ≈ hxmin < HG2 ≈ hxp < HG3 ≈ hxmax. In short, in this embodiment, the selection of pumps for any pump group 2 should follow the principle of selecting pumps in parallel with the corresponding water supply area 1, while also considering the parameters of water supply across upstream and downstream areas. This ensures that after selection, during operation, the control component can select pumps from other water supply areas 1 to supply water to this water supply area 1 based on the pipeline flow or pressure parameters.

[0050] Furthermore, if the operating flow range of the initially selected pumps included in each pump group 2 fails to completely cover the flow range of the corresponding water supply area 1, then each pump group 2 also includes supplementary pumps. The flow range of the supplementary pumps is [qnmin, qnmax]. In this embodiment, the design flow rates of the three pumps and the supplementary pumps in the water supply area 1 and the design flow rate of the corresponding water supply area 1 satisfy: [Qmin, Qmax] = [q3min, q3max) ∪ [q2min, q2max) ∪ [q1min, q1max) ∪ [qnmin, qnmax]. That is, by setting supplementary pumps, the X pumps included in each pump group 2 can achieve full coverage of the flow range of the corresponding water supply area 1. Optionally, the supplementary pumps can be one or more, i.e., [qnmin, qnmax] = [qn1min, qn1max) ∪ [qn2min, qn2max) ∪ … [qnxmin, qnxmax].

[0051] Furthermore, when selecting pumps for each water supply zone 1, once the pump model corresponding to the first water supply zone 1 is selected, this group of pumps can also serve other water supply zones 1. That is, the head of the pumps serving other water supply zones is a value between Hmin and Hmax. The pumps for the existing water supply sections can be marked on the flow charts of other water supply zones. Therefore, it is not necessary to select matching pumps for these water supply sections; only the flow ranges not covered by water supply zone 1 need to be configured with pumps. For example... Figure 2 As shown, after the selection of each pump in pump set B22 is completed according to the relevant parameters of G2 zone 12, the corresponding operating flow range of pump B1 will be different when it runs in different water supply zones 1, such as G1 zone 11, G2 zone 12, and G3 zone 13. It is understandable that, based on this, the X pumps included in each pump set 2 (three initially selected pumps + supplementary selected pumps) may overlap. Specifically, refer to... Figure 3 In this embodiment, since the flow ranges of pumps B1, B2, and B3 included in pump group 2 corresponding to G2 zone 12 do not fully cover the design flow range of G2 zone, pump A3 in G1 zone and pump C1 in G3 zone can be used as supplementary water pumps for G2 zone to achieve full coverage of the design flow range of G2 zone 12 through the flow ranges of pumps B3, A3, B2, C1, and B1. That is, based on this, [Q2min, Q2max] = [qB3min, qB3max) ∪ [qA3min, qA3max) ∪ [qB2min, qB2max) ∪ [qC1min, qC1max) ∪ [qB1min, qB1max].

[0052] Optionally, the pump set 2 also includes multiple regulating valves and multiple water supply pipes. Each water pump is connected to the main water supply pipe 101 through a water supply pipe, and a regulating valve is installed on each water supply pipe. Each regulating valve is electrically connected to the control component. When a water pump needs to work, the regulating valve corresponding to that water pump is opened. In this embodiment, pumps A1, A2, and A3 are connected to the main water supply pipes of areas G1, G2, and G3 through the first water supply pipe 201. A first regulating valve 2011 is installed on the first water supply pipe 201. By adjusting the opening and closing of the first regulating valve 2011, the pump set A21 can alternately supply water to areas G1 11, G2 12, and G3 13. Similarly, pumps B1, B2, and B3 are connected to the main water supply pipes of areas G1, G2, and G3 via a second water supply pipe 202. A second regulating valve 2021 is installed on the second water supply pipe 202, allowing pump unit B22 to alternately supply water to areas G11, G22, and G313 by adjusting the opening and closing of the second regulating valve 2021. Pumps C1, C2, and C3 are connected to the main water supply pipes of areas G1, G2, and G3 via a third water supply pipe 203. A third regulating valve 2031 is installed on each of the third water supply pipes 203, allowing pump unit C23 to alternately supply water to areas G11, G22, and G313 by adjusting the opening and closing of the third regulating valve 2031.

[0053] Optionally, the pump unit 2 further includes M second pressure switches 24, each of which is installed on the main water supply pipe 101 of the M water supply zones 1, and all M second pressure switches 24 are electrically connected to the control component. Alternatively, the pump unit 2 further includes M second flow switches, each of which is installed on the main water supply pipe 101 of the M water supply zones 1, and all M second flow switches are electrically connected to the control component. That is, the automatic switching of the pump unit 2 can be realized based on the signals fed back to the control component by the second pressure switches 24 or second flow switches installed on the main water supply pipe 101 of each water supply zone 1. When the second pressure switch 24 or second flow switch of a certain water supply zone 1 detects that the pressure or flow rate in its main water supply pipe 101 matches that of a certain water pump, it feeds back the signal to the control component to start the water pump to supply water to that water supply zone 1. For example, pump B1 is activated when the flow rate in zone G2 exceeds Q1 (qB1min); pump C1 is activated when the flow rate in zone G2 is between Q1 (qC1max) and Q2 (qC1min); pump B2 is activated when the flow rate in zone G2 is between Q2 (qB2max) and Q3 (qB2min); pump A3 is activated when the flow rate in zone G2 is between Q3 (qA3max) and Q4 (qA3min); and pump B3 is activated when the flow rate in zone G2 is less than Q4 (qB3max). Similarly, the operation control of pump group A21 in zone G1 and pump group C23 in zone G3 is the same. Furthermore, the minimum flow rate required to start pump group 2 in each water supply zone 1 is greater than the preset flow rate required to open the first pressure tank 34.

[0054] Optionally, all pumps may be fixed-frequency pumps. The selection criteria and piping requirements for pump set 2, where all pumps are fixed-frequency pumps, have been specifically explained above. Based on this, fewer pumps can be installed, and energy-saving measures such as reducing pump start-up and shutdown frequency can be implemented. In other embodiments, the multiple pumps may include both fixed-frequency and variable-frequency pumps. That is, one or more pumps mentioned above can be replaced with variable-frequency pumps. When the water supply to the lower zone is small, the variable-frequency pump can supply water to the lower zone across zones to meet the low-flow water supply requirements, while other control logic remains unchanged.

[0055] Optionally, the water pump supply system provided in this embodiment further includes a second pressure tank 4, as shown in the reference. Figure 1The second pressure tank 4 is located near the pump group 2 and upstream of the second pressure switch 24 or the second flow switch. The second pressure tank 4 buffers the flow and pressure within the main water supply pipe 101 during pump group 2 switching. Located in a low-pressure zone, the second pressure tank 4 utilizes its air pressure water supply function to buffer the unstable changes in flow and pressure during pump switching. Furthermore, the second pressure tank 4 improves water hammer and provides further protection for the pump. Optionally, in other embodiments, the second pressure tank 4 can be located near the end of the main water supply pipe 101 in the water supply area 1. In addition to improving the instability of flow and pressure during pump switching, the second pressure tank 4 can also supply water to the water supply area 1 when the flow and pressure within the main water supply pipe 101 are low.

[0056] Finally, please refer to the appendix. Figure 4 Taking the operation of zone G2 12 as an example, the operation of the water pump supply system provided in this embodiment will be described in general. The pressure nodes of the first pressure tank 33 are Pm and Pn, and Pm > Pn. When the pressure of the first pressure tank 33 is < Pn, the first pressure tank 33 receives water; when the pressure of the first pressure tank 33 is > Pm, the first pressure tank 33 stops receiving water. The flow node of the first flow switch 35 is Q1. When the flow of the first flow switch 35 is < Q1, the water supply valve 32 opens, and the first pressure tank 33 supplies water; when the flow of the first flow switch 35 is > Q1, the water supply valve 32 closes, and the first pressure tank 33 stops supplying water. The pressure nodes of the second pressure tank 4 are Pa and Pb, and Pa > Pb. The pressure nodes of the second pressure switch 24 are P1, P2, and P3, and P1 > P2 > P3. When the pressure of the second pressure switch 24 is greater than P1 and the pressure of the second pressure tank 4 is greater than Pa, the water pump stops, and the first pressure tank 33 or the second pressure tank 4 supplies water. When the pressure of the second pressure switch 24 is less than P2, the water pump stops, and the first pressure tank 33 or the second pressure tank 4 supplies water. The water pump supply is based on the water pump start / stop list for each flow segment in zone G2. As mentioned above, different water pumps are activated to supply water when the water consumption in zone G2 12 is in different ranges. That is, the water supply range of the water pump is when the pressure of the second pressure switch 24 is between P1 and P2. When the pressure of the second pressure switch 24 is within this range, because each water supply zone 1 has been configured with a certain number of water pumps and other water pumps that can be called by other water supply zones 1, these can all supply water to this water supply zone 1. Moreover, the range of the flow rate and head parameters of all water pumps operating in this water supply zone 1 is known beforehand. When the real-time pressure obtained by the second pressure switch 24 matches the parameters of a certain water pump, the pump is controlled to operate. Alternatively, if the water supply system does not have a second pressure switch 24 but a second flow switch, similarly, if the second flow switch detects which water pump's parameters match the real-time flow of the main water supply pipe 101, it controls that water pump to operate.

[0057] In summary, the water pump supply system provided by this invention can achieve two main benefits: First, energy saving. The conventional approach to energy-saving water supply in high-rise buildings is to divide the building into multiple water supply zones 1 along its height. While multiple water supply zones 1 can increase energy efficiency during periods of high water consumption, too many zones reduce the size of the pumps, leading to decreased efficiency for individual pumps and consequently, inefficiency during off-peak hours. This solution connects multiple water supply zones 1, allowing for unified supply using a large pump, thus achieving a balance between peak and off-peak water consumption energy saving. Second, cost savings. The mutual switching of pumps between different water supply zones 1 solves the problem of excessive investment associated with using more pumps. Thirdly, it makes variable frequency pumps truly more energy-efficient. A problem with traditional variable frequency pumps for high-rise building water supply is that the head variation range is too low (the head variation range is the water loss difference formed by peak and off-peak water flow). The low head variation range means that the variable frequency pump cannot meet the small flow demand during off-peak water use, leading to problems such as frequent pump start-stop. This solution can perfectly solve this problem by adjusting the high-zone pump to the low-zone variable frequency operation, allowing the variable frequency pump to truly achieve variable frequency operation.

[0058] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water pump supply system, characterized in that, include: Water supply area (1) is set up with M areas, including area G1 (11), area G2 (12) ... area GM. The head relationship of the water supply area (1) satisfies: HG1 < HG2 < ... < HGM; The pump group (2) is provided with M units. Each pump group (2) includes at least one water pump, and the water pump of each pump group (2) can be connected to the M water supply areas (1) so that the different water supply areas (1) operating in parallel can coordinate the flow and supply of water. The M pump groups (2) include pump group A (21), pump group B (22) ... pump group M. The head relationship of the M pump groups (2) satisfies: hA < hB < ... < hM; Water supply assembly (3) is located at the end of the main water supply pipe (101) of the water supply area (1). The water supply assembly (3) includes a first pressure tank (33) and a first check valve (34). The first pressure tank (33) is used to supply water to the water supply area (1) when the water supply pipe (101) is at a preset pressure or a preset flow rate. The first check valve (34) is used to prevent water from flowing back through the first pressure tank (33). A control component, which is electrically connected to the pump set (2) and the water supply component (3); The water pump supply system also includes a second pressure tank (4), which is used to buffer the flow and pressure in the main water supply pipe (101) when the pump group (2) switches. The pump set (2) further includes M second pressure switches (24), which are respectively installed on the main water supply pipes (101) of the M water supply zones (1), and all M second pressure switches (24) are electrically connected to the control component; or The pump set (2) also includes M second flow switches, which are respectively installed on the water supply main pipe (101) of the M water supply areas (1), and all M second flow switches are electrically connected to the control component.

2. The water pump supply system according to claim 1, characterized in that, The maximum design flow rate of the water supply area (1) is Qmax, the minimum design flow rate is Qmin, and the average design flow rate is Qp. The flow rate of the pumps in the pump group (2) of the water supply area (1) is qp. Each pump group (2) includes a pre-selected pump. The flow rate of the pre-selected pump satisfies: q1p=Qmax, q2p=Qp, q3p=Qmin, and q1p≠q2p≠q3p, or q1p≈q2p≈q3p, or only q1p≈q2p, or only q2p≈q3p, or only q1p≈q3p. The head of the water supply area (1) is H, the head of the pump group (2) is h, and the head of the initially selected pumps included in each pump group (2) satisfies: h1=h2=h3. The minimum head of the pumps in the M pump groups (2) is hxmin, and the maximum head is hxmax. The head of the G1 area (11) is HG1, and the head of the GM area is HGM. hxmin≈HG1, hxmax≈HGM.

3. The water pump supply system according to claim 2, characterized in that, The working efficiency of the water pump is η, and η1=η3≤η≤η2. When the working efficiency of the water pump is η1, the head of the water pump is hmin and the flow rate of the water pump is qmax. When the working efficiency of the water pump is η2, the head of the water pump is h and the flow rate of the water pump is qp. When the working efficiency of the water pump is η3, the head of the water pump is hmax and the flow rate of the water pump is qmin. The design flow rate of the water supply area (1) satisfies: [Qmin, Qmax] = [q3min, q3max) ∪ [q2min, q2max) ∪ [q1min, q1max], and q3max = q2min, q2max = q1min, q3min = Qmin, q1max = Qmax.

4. The water pump supply system according to claim 3, characterized in that, Each of the pump sets (2) also includes a supplementary water pump with a flow range of [qnmin, qnmax]. The design flow of the water supply area (1) satisfies: [Qmin, Qmax] = [q3min, q3max) ∪ [q2min, q2max) ∪ [q1min, q1max) ∪ [qnmin, qnmax].

5. The water pump supply system according to claim 1, characterized in that, The water supply assembly (3) also includes a water supply branch pipe (31) and a water supply valve (32). The water supply branch pipe (31) is connected in parallel at the end of the main water supply pipe (101). The first check valve (34), the first pressure tank (33) and the water supply valve (32) are sequentially arranged on the water supply branch pipe (31). The water supply assembly (3) further includes a first pressure switch, which is disposed on the water supply main pipe (101) and located downstream of the water supply valve (32), or the water supply assembly (3) further includes a first flow switch (35), which is disposed on the water supply main pipe (101) and located downstream of the water supply valve (32).

6. The water pump supply system according to claim 5, characterized in that, A water supply area (1) includes a plurality of water supply branches (102) arranged in parallel, a water supply branch (102) being an end of a water supply main (101), a water supply branch (102) having a water supply assembly (3), and the first pressure tanks (33) of the plurality of water supply assemblies (3) being connected.

7. The water pump supply system according to claim 1, characterized in that, The pump set (2) also includes multiple regulating valves and multiple water supply pipes. A water pump is connected to the main water supply pipe (101) through one of the water supply pipes. A regulating valve is installed on one of the water supply pipes. Each regulating valve is electrically connected to the control component.

8. The water pump supply system according to any one of claims 1-7, characterized in that, Multiple pumps are all fixed-frequency pumps; or multiple pumps include both fixed-frequency pumps and variable-frequency pumps.

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