Water delivery conduit system for a water hammer arrestor

Abstract

The application belongs to the technical field of water hammer elimination, and specifically discloses a water pipeline system capable of preventing water hammer. The water pipeline system comprises a water pipeline, a water pumping device for pumping water into the water pipeline, and a pressurizing device for increasing water pressure in the middle part of the water pipeline. A first check valve, a first water hammer relief valve and a first water hammer elimination tank are connected to the outlet of the water pumping device in the water pipeline, a second check valve, a second water hammer relief valve and a second water hammer elimination tank are connected to the outlet of the pressurizing device in the water pipeline, and a plurality of water hammer prevention air valves are arranged along the water pipeline. The water pipeline system has good water hammer prevention capability.

Description

Technical Field

[0001] This application belongs to the field of water hammer elimination technology, and more specifically, relates to a water delivery pipeline system for preventing water hammer. Background Technology

[0002] Water hammer is a common dynamic shock phenomenon in fluid transport systems. It refers to the phenomenon where a sudden change in the flow velocity of a fluid (such as water or oil) in a pipeline causes a rapid change in fluid momentum, leading to a large fluctuation in pressure. This fluctuation forms an alternating stress wave within the piping system at a propagation speed close to the speed of sound, causing a destructive effect on pipes, valves, pumps, and other equipment similar to being "hammered," hence the name "water hammer."

[0003] Currently, in water transmission pipeline systems, operations such as starting and stopping pumps and opening and closing valves can cause drastic changes in water velocity. In particular, when the water pump motor suddenly trips, the pressure fluctuations in the water transmission pipeline system are so severe that the system is prone to pipe bursts, vibrations, or being crushed by negative pressure, which seriously affects the operational safety of the water transmission pipeline system and urgently needs improvement. Utility Model Content

[0004] In view of the deficiencies or improvement needs of the prior art, this application provides a water conveyance pipeline system that is resistant to water hammer, aiming to improve the water conveyance pipeline system's resistance to water hammer.

[0005] This application provides a water delivery pipeline system for preventing water hammer, comprising: Water pipeline; A pumping device for drawing water into the water pipeline; A pressurizing device for increasing water pressure in the middle of the water pipeline; The water pipeline is equipped with a first check valve, a first water hammer relief valve, and a first water hammer elimination tank at the outlet of the pumping device. The water pipeline is also equipped with a second check valve, a second water hammer relief valve, and a second water hammer elimination tank at the outlet of the pressurizing device. Several water hammer air valves are installed along the water pipeline.

[0006] As a further preferred embodiment, there are multiple pressurizing devices, and the multiple pressurizing devices are arranged in parallel.

[0007] As a further preferred embodiment, multiple second check valves and multiple second water hammer relief valves are provided for the pressurization device, and one second water hammer elimination tank is provided. After the outlet of each pressurizing device is connected to the corresponding second check valve and second water hammer relief valve, it is connected to the same second water hammer elimination tank.

[0008] As a further preferred embodiment, the water supply pipeline includes a first main pipe and a second main pipe. The first main pipe is connected to the outlet of the pumping device and the inlet of the pressurizing device. One end of the second main pipe is connected to the outlet of the pressurizing device, and the other end is connected to an end storage tank. The diameter of the second main pipe is smaller than that of the first main pipe.

[0009] As a further preferred embodiment, a central water storage tank is connected in series between the first main pipe and the pressurizing device.

[0010] As a further preferred embodiment, the pumping device includes a horizontal volute double-suction water supply pump with a rated flow rate of 0 m³ / h. 3 / h~687m 3 / h, rated head is 115m~155m, rated power is 30kW~409kW.

[0011] As a further preferred embodiment, the pressurizing device includes a horizontal centrifugal pump with a rated flow rate of 0 m³ / h. 3 / h~368m 3 / h, rated head is 75m~125m, rated power is 15kW~172kW.

[0012] As a further preferred embodiment, the first water hammer relief valve and the second water hammer relief valve have a diameter of DN80 and a relief pressure of 1.6MPa.

[0013] As a further preferred embodiment, both the first and second check valves are quick-closing check valves, and their pressure rating is not less than 1.6 MPa.

[0014] As a further preferred embodiment, between the first water hammer elimination tank and the second water hammer elimination tank, a plurality of water hammer air valves with a pressure rating of 1.6 MPa and a plurality of water hammer air valves with a pressure rating of 1.0 MPa are installed along the water supply pipeline, and the water hammer air valves are located upstream of the water hammer air valves. Downstream of the second water hammer elimination tank, several water hammer air valves with a pressure rating of 1.6 MPa and several water hammer air valves with a pressure rating of 1.0 MPa are installed along the water pipeline, and the water hammer air valves are located upstream of the water hammer air valves.

[0015] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages: 1. This application provides comprehensive protection against water hammer from local to global by installing water hammer relief valves, water hammer air valves, water hammer elimination tanks, and quick-closing check valves at specific locations in the water pipeline system. This design can stabilize system pressure, reduce the pressure fluctuation range of the entire system, thereby reducing the possibility of pipe bursts caused by excessively high system pressure, and also prevent the system from generating excessively low negative pressure.

[0016] 2. By setting up multiple second check valves and second water hammer relief valves, as well as a general second water hammer elimination tank, this application can take into account both the local protection of a single pressurization device and the overall water hammer control of the system, while optimizing cost and space. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a water delivery pipeline system for waterproof hammers provided in an embodiment of this application; Figure 2 This application provides a schematic diagram of a water pipeline system with a second water hammer relief valve to prevent water hammer. Figure 3 This is a simulation diagram of a water pipeline system in a related art provided in an embodiment of this application; Figure 4 yes Figure 3 The simulated pressure curve at the check valve of the second-stage pump room in the system shown is a graph. Figure 5 yes Figure 3 The simulated pressure curve at the check valve of the third-stage pump room in the system shown is a graph. Figure 6 yes Figure 3 The diagram shows the maximum and minimum pressure envelopes along the pipeline in the system shown. Figure 7 Based on Figure 3 The diagram shows a simulation of a water pipeline system that has been improved to prevent water hammer. Figure 8 yes Figure 7 The simulated pressure curve at the check valve of the second-stage pump house when the system experiences an accident and pumps stop; Figure 9 yes Figure 7 The simulated pressure curve at the check valve of the third-level pump house when the system experiences an accident and pumps stop; Figure 10 yes Figure 7 The diagram shows the pressure and gas change curves in the tank at the water hammer elimination point of the second-stage pump station of the system. Figure 11 yes Figure 7 The diagram shows the pressure and gas change curves in the tank at the third-level pump station of the system where water hammer is eliminated. Figure 12 yes Figure 7 The diagram shows the maximum and minimum pressure envelopes along the pipeline in the system shown. Figure 13 yes Figure 7 The figure shows a comparison of the pressure simulation results at the check valve with and without a water hammer elimination tank at the second-level pump station of the system shown.

[0018] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1. Pumping device; 1a. Pumping device; 1b. Pumping device; 2. Pressurizing device; 2a. Pressurizing device; 2b. Pressurizing device; 3. First check valve; 4. First water hammer relief valve; 5. First water hammer elimination tank; 6. Second check valve; 7. Second water hammer relief valve; 8. Second water hammer elimination tank; 9. Water hammer air valve; 9-1a. First water hammer air valve; 9-1b. Second water hammer air valve; 9-2a. Third water hammer air valve; 9-2b. Fourth water hammer air valve; 10. Water supply Branch pipe; 10a, water supply branch pipe; 10b, water supply branch pipe; 11, first main pipe; 12, second main pipe; 13, initial reservoir; 14, middle reservoir; 14a, middle reservoir; 14b, middle reservoir; 15, final reservoir; 15a, final reservoir; 15b, final reservoir; 16, branch reservoir; 16a, branch reservoir; 16b, branch reservoir; 17, valve; 17a, valve; 17b, valve; 18, ordinary air valve; 19, slow-closing check valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] The following is in conjunction with the appendix Figures 1-13 This application will be described in further detail.

[0021] This application discloses a water delivery pipeline system for preventing water hammer. (Refer to...) Figure 1 The water supply pipeline system for preventing water hammer includes a water supply pipeline, a pumping device 1, and a pressurizing device 2. The pumping device 1 is used to pump water into the water supply pipeline, and the pressurizing device 2 is used to increase the water pressure in the middle of the water supply pipeline. A first check valve 3, a first water hammer relief valve 4, and a first water hammer elimination tank 5 are connected to the outlet of the pumping device 1 in the water supply pipeline. A second check valve 6, a second water hammer relief valve 7, and a second water hammer elimination tank 8 are connected to the outlet of the pressurizing device 2 in the water supply pipeline. Several water hammer air valves 9 are installed along the water supply pipeline.

[0022] In this design, by installing a water hammer suppression tank in the system, the water hammer suppression tank can effectively stabilize the system pressure and reduce the pressure fluctuation range of the entire system in the event of a sudden power outage or tripping. This reduces the possibility of pipe rupture due to excessive system pressure and prevents negative pressure from forming in the system. In particular, the system is also equipped with a water hammer relief valve, which effectively improves the safety factor of the entire system. Furthermore, all air valves along the line are water hammer-resistant air valves (9). By limiting the water filling rate using these air valves, the risk of water hammer during the filling phase can be reduced, ensuring the safe operation of the system.

[0023] Furthermore, such as Figure 1 As shown, in some embodiments, there are multiple pressurizing devices 2, which are connected in parallel. With this design, the user can flexibly control the activation status of multiple pressurizing devices 2 according to actual pressure requirements, to better match dynamically changing pressure demands; for example, 1-2 pressurizing devices 2 can be activated under low load, while all pressurizing devices 2 can be activated under high load, avoiding energy waste. Preferably, in some embodiments, three pressurizing devices 2 are connected in parallel, and are used in a two-in-use, one-on-standby mode in normal operation.

[0024] Furthermore, such as Figure 1 As shown, in some embodiments, multiple second check valves 6 and multiple second water hammer relief valves 7 are provided corresponding to the pressurizing device 2. That is, multiple second check valves 6 correspond one-to-one with multiple pressurizing devices 2, multiple second water hammer relief valves 7 correspond one-to-one with multiple pressurizing devices 2, and one second water hammer elimination tank 8 is provided. Each pressurizing device 2's outlet is connected to its corresponding second check valve 6 and second water hammer relief valve 7, and then connected to the same second water hammer elimination tank 8. Preferably, the second check valve 6 is located upstream of the second water hammer relief valve 7.

[0025] Under this design, by setting multiple second check valves 6 and second water hammer relief valves 7, as well as a general second water hammer elimination tank 8, it is possible to take into account both the local protection of a single pressurization device 2 and the overall water hammer control of the system, while simultaneously optimizing cost and space.

[0026] In particular, when a single pressurizing device 2 shuts down, the second check valve 6 effectively prevents water in the system from flowing back to that pressurizing device 2, avoiding the risk of reverse rotation and damage, while not affecting the normal water supply of other parallel pressurizing devices 2. When a single pressurizing device 2 starts or stops, or when sudden changes in flow cause local water hammer, the second water hammer relief valve 7 can quickly release the instantaneous high pressure of that branch, preventing local water hammer from spreading to the entire system. The shared second water hammer elimination tank 8 can help balance the pressure of the entire pipeline when the system pressure is unstable (such as when some devices are running or some are shut down), reducing the impact of pressure fluctuations on each pipeline and improving the stability of the water supply.

[0027] like Figure 2 As shown, in some other embodiments, a second water hammer relief valve 7 is connected on the water supply pipeline downstream of the second water hammer elimination tank 8. This second water hammer relief valve 7 will release any excessive pressure that may exist downstream of the second water hammer elimination tank 8 to ensure system safety. In this design, the second water hammer relief valve 7 between the pressurizing device 2 and the second water hammer elimination tank 8 can be removed or retained as needed.

[0028] In reality, when water hammer pressure waves propagate within the pipeline, even after being buffered and absorbed by the second water hammer suppression tank 8, residual pressure waves may still diffuse downstream. If these residual pressure peaks exceed the pressure-bearing limit of the downstream pipeline, risks will still arise. In some extreme cases, such as when the air bladder of the second water hammer suppression tank 8 ruptures, its ability to control water hammer in the system will significantly decrease or even completely fail, leading to a high pressure risk downstream of the second water hammer suppression tank 8. By installing a second water hammer relief valve 7 downstream of the second water hammer suppression tank 8, water hammer damage to downstream pipelines can be effectively prevented.

[0029] Similarly, multiple pumping devices 1 can be connected in parallel. The layout of the first check valve 3, the first water hammer relief valve 4, and the first water hammer elimination tank 5 near the pumping device 1 can be similar to the layout design of the second check valve 6, the second water hammer relief valve 7, and the second water hammer elimination tank 8 downstream of the pressurizing device 2.

[0030] Furthermore, such as Figure 1 As shown, in some embodiments, the water supply pipeline is connected to several branch pipes 10 along its length, and the water supply pipeline includes a first main pipe 11 and a second main pipe 12. The inlet of the pumping device 1 is connected to a first-end reservoir 13, and the first main pipe 11 is connected to the outlet of the pumping device 1 and the inlet of the pressurizing device 2. One end of the second main pipe 12 is connected to the outlet of the pressurizing device 2, and the other end is connected to a final reservoir 15. The diameter of the second main pipe 12 is smaller than the diameter of the first main pipe 11.

[0031] Furthermore, a central water storage tank 14 is connected in series between the first main pipe 11 and the pressurizing device 2, and each water supply branch pipe 10 is connected to a branch water storage tank 16, and each water supply branch pipe 10 is equipped with an adjustable valve 17.

[0032] Under this design, the first-end water storage tank 13 can ensure the stability of the water supply to the entire system; the middle water storage tank 14 can balance the fluctuations of the water flow from the first main pipe 11 and the water demand of the pressurizing device 2, and avoid the system operation being affected by unstable water volume; the end water storage tank 15 can collect the excess water supplied by the system; and the branch water storage tank 16 can pre-store the water output from each water supply branch pipe 10 to meet the immediate water demand of relevant users (such as enterprises and residential areas).

[0033] Furthermore, in some embodiments, the first main pipe 11 has a diameter of DN400 and is made of ductile iron, while the second main pipe 12 has a diameter of DN300 or DN350 and is made of ductile iron.

[0034] Furthermore, in some embodiments, the pumping device 1 includes two horizontal volute double-suction water supply pumps connected in parallel, one in use and one on standby, with a rated flow rate of 0 m³ / h. 3 / h~687m 3 The pumping unit has a rated head of 115m~155m and a rated power of 30kW~409kW. Two first water hammer relief valves 4 are connected near the outlet of each pumping unit 1.

[0035] For example, the rated flow rate of the horizontal volute double-suction water supply pump is 687 m³ / h. 3 / h, or 300m 3 / h, or 100 m 3 / h, etc.; the rated head of the horizontal volute double-suction water supply pump is 115m, or 155m, or 135m, etc.; the rated power of the horizontal volute double-suction water supply pump is 30kW, or 409kW, or 220kW, etc.

[0036] Furthermore, in some embodiments, the pressurizing device 2 includes three horizontal centrifugal pumps, two in operation and one as a standby, with a rated flow rate of 0 m³ / h. 3 / h~368m 3 / h, rated head is 75m~125m, rated power is 15kW~172kW.

[0037] For example, the rated flow rate of a horizontal centrifugal pump is 245 m³ / h. 3 / h, or 368m 3 / h, etc.; the rated head of the horizontal centrifugal pump is 75m, or 95m, or 125m, etc.; the rated power of the horizontal centrifugal pump is 15kW, or 132kW, or 172kW, etc.

[0038] Furthermore, in some embodiments, the first water hammer relief valve 4 and the second water hammer relief valve 7 have a diameter of DN80 and a relief pressure of 1.6MPa.

[0039] Furthermore, in some embodiments, the first check valve 3 and the second check valve 6 are both quick-closing check valves, and the pressure rating is not less than 1.6 MPa.

[0040] Specifically, the pressure rating can be 1.6MPa, 1.7MPa, or 1.8MPa, etc., as long as the pressure rating of the first check valve 3 and the second check valve 6 cannot be lower than the maximum pressure that the water pipeline can withstand; where the maximum pressure that the water pipeline can withstand refers to the maximum pressure that the system may experience under all operating conditions.

[0041] Furthermore, in some embodiments, a number of water hammer resistant air valves 9 located between the first water hammer resistant tank 5 and the second water hammer resistant tank 8, and adjacent to the first water hammer resistant tank 5, have a pressure rating of 1.6 MPa; a number of water hammer resistant air valves 9 located downstream of the second water hammer resistant tank 8, and adjacent to the second water hammer resistant tank 8, have a pressure rating of 1.6 MPa; the remaining water hammer resistant air valves 9 have a pressure rating of 1.0 MPa. The specific distance of "adjacent" needs to be selected and determined based on actual engineering requirements and site conditions. Generally, the pressure rating of 1 to 4 water hammer resistant air valves 9 located near the outlet of the water hammer resistant tank and downstream of the water hammer resistant tank is 1.6 MPa.

[0042] Specifically, between the first water hammer elimination tank 5 and the second water hammer elimination tank 8, a number of first water hammer resistant air valves 9-1a with a pressure rating of 1.6 MPa and a number of second water hammer resistant air valves 9-1b with a pressure rating of 1.0 MPa are installed along the water supply pipeline, with the first water hammer resistant air valves 9-1a located upstream of the second water hammer resistant air valves 9-1b. Downstream of the second water hammer elimination tank 8, a number of third water hammer resistant air valves 9-2a with a pressure rating of 1.6 MPa and a number of fourth water hammer resistant air valves 9-2b with a pressure rating of 1.0 MPa are installed along the water supply pipeline, with the third water hammer resistant air valves 9-2a located upstream of the fourth water hammer resistant air valves 9-2b (see subsequent appendix). Figure 7 ).

[0043] Comparative example: like Figure 3 The diagram shows a pipeline system in a related technology. Pumping device 1a is located at a secondary pumping station. It should be noted that the pumping station can be a building or other structure used to house and protect the pumping device and other equipment. Pressurization device 2a is located at a tertiary pumping station. The secondary pumping station pressurizes and supplies water to the central reservoir 14a at the tertiary pumping station. The first main pipe 11a is a DN400 pipe made of ductile iron. Along the direction from pumping device 1a to pressurization device 2a, the ends of various branch pipes 10a distributed along the main water supply line will serve as water intake points. The designed water consumption for each water intake point is as follows: First water intake point: 150m 3 / d.

[0044] Second water intake point: 1000m 3 / d.

[0045] Third water intake point: 1400m 3 / d.

[0046] Fourth water intake point: 500m 3 / d.

[0047] Fifth water intake point: 3000 m 3 / d.

[0048] Sixth water intake point: 100 m 3 / d.

[0049] Seventh water intake point: 200 m 3 / d.

[0050] Eighth water intake point: 4400 m 3 / d.

[0051] The pressurizing device 2a pressurizes and supplies water to multiple downstream water intake points. The diameter of the second main pipe 12a from the pressurizing device 2a to the node of the water supply branch pipe 10a where the seventh water intake point is located is DN350. The diameter of the section of the second main pipe 12a extending downstream from the node of the water supply branch pipe 10a where the seventh water intake point is located is DN300. The material is ductile iron. In addition, 21 ordinary air valves 18 with a diameter of DN50 are distributed along the main water supply pipe. Among them, the water supply branch pipe 10a extending from the central reservoir 14a is De160. The other components of the system have no special restrictions and will not be described in detail.

[0052] At the secondary pumping station where pumping unit 1a is located, two horizontal volute double-suction water supply pumps are installed in parallel, one for operation and one for standby (the standby unit is not shown), with a rated flow rate Q=458m³ / h. 3 / h, rated head 135m, rated power N=315kW. A DN300, PN16 slow-closing check valve 19 is connected in series at the outlet of the pumping unit 1a.

[0053] At the 3rd-level pump station where pressurization device 2a is located, three horizontal centrifugal pumps are installed in parallel, with two in operation and one as a backup (the backup unit is not shown). The rated flow rate is Q=245m³ / h. 3 / h, rated head 95m, rated power N=132kW. The outlet of pumping unit 1a is connected to a DN200, PN16 slow-closing check valve 19.

[0054] If pumping device 1a and pressurizing device 2a experience a power outage due to an accident, the check valve will close rapidly when the flow velocity in the pump outlet pipe drops to 0, as per [reference]. Figures 4-6 The simulation diagram shown illustrates that: 1. Reference Figure 4At the level 2 pump station, after the pressurization device 2 stops operating quickly, the pressure at the pump station drops rapidly and then rises again. The first pressure peak is the largest, with a simulated value of 222.1 m. Then the peak value begins to gradually decrease, and the pressure change cycle is about 15 seconds.

[0055] 2. Reference Figure 5 The water hammer during pump shutdown at a Level 3 pumping station is milder than that at a Level 2 pumping station, with only a rapid pressure drop at the initial moment.

[0056] 3. Reference Figure 6 As can be seen from the envelope, due to the power failure of the water pump, the pumping station experienced rapid pressure loss, which caused negative pressure to appear downstream of the pipeline.

[0057] Example: Reference Figure 7 This document presents a flowchart of a water hammer prevention pipeline system, which is an improvement upon the traditional pipeline system shown in the comparative example above. Specifically, the traditional pipeline system is modified by adding a first water hammer elimination tank 5, a second water hammer elimination tank 8, a first water hammer relief valve 4, and a second water hammer relief valve 7. The slow-closing check valve 19 is replaced with a fast-closing check valve (i.e., the first check valve 3 and the second check valve 6), and the ordinary air valve 18 is replaced with a water hammer prevention air valve 9. Relevant model parameters are as follows: 1. The total volume of the water hammer elimination tanks (i.e., the first water hammer elimination tank 5 and the second water hammer elimination tank 8) is 4m³. 3 The pressure rating (i.e., the maximum pressure that the tank and related connecting parts can safely withstand) is 1.6MPa, and there are 2 units, with a connecting pipe diameter of DN200, which are respectively located at the level 2 pump house and the level 3 pump station.

[0058] 2. The water hammer relief valves (i.e., the first water hammer relief valve 4 and the second water hammer relief valve 7) have a diameter of DN80, a pressure rating of 1.6MPa, and a quantity of 4 units, two of which are installed at the outlet of the corresponding quick-closing check valve.

[0059] 3. At each level 2 pumping station, two DN300 quick-closing check valves with a pressure rating of 1.6MPa are installed for each pumping device 1b.

[0060] 4. At each of the three-stage pump stations, one DN200 quick-closing check valve with a pressure rating of 1.6MPa is installed for each pressurization device 2b.

[0061] 5. The diameter of the water hammer air valve 9 is DN50. There are approximately 21 such valves in the entire pipeline. Among them, the pressure rating of the three water hammer air valves 9 located between the first water hammer elimination tank 5 and the second water hammer elimination tank 8 and adjacent to the first water hammer elimination tank 5 is 1.6MPa, namely the first water hammer air valve 9-1a; the pressure rating of the four water hammer air valves 9 located downstream of the second water hammer elimination tank 8 and adjacent to the second water hammer elimination tank 8 is 1.6MPa, namely the third water hammer air valve 9-2a; the pressure rating of the remaining water hammer air valves 9 is 1.0MPa, namely the second water hammer air valve 9-1b and the fourth water hammer air valve 9-2b.

[0062] Depend on Figures 8-13 It can be seen that this improved design has at least the following effects: 1. Reference Figures 8-13 By adding a water hammer elimination tank, which has a pressure stabilizing effect, the system pressure can be stabilized very well when the water pump motor suddenly trips, reducing the pressure fluctuation range of the entire system. This can reduce the possibility of pipe bursting due to excessive system pressure and prevent the system from generating negative pressure.

[0063] 2. Reference Figures 8-9 The pumping station uses a quick-closing check valve, which prevents backflow in the pipeline and the water pump from reversing, thus avoiding potential damage to the water pump and motor.

[0064] 3. Reference Figure 12 After the pump room was equipped with a water hammer relief valve, the safety factor of the entire system was improved.

[0065] 4. Reference Figure 13 After all the air valves along the line were equipped with water hammer air valves 9, the water filling speed was limited, reducing the risk of water hammer during the water filling stage.

[0066] Wherein, "head" represents pressure head, "Time" represents time (moment), "Pressure" represents pressure intensity, "Distance" represents distance, "SDO-1 Head" represents the pressure at the installation point of the equipment (water hammer elimination tank), "SDO-1 Gas Volume" represents the gas volume inside the water hammer elimination tank, "Gas Volume" represents the gas volume, "Outlet" represents the simulated pressure result at the check valve outlet (referring to the simulation result when a water hammer elimination tank is installed), "Prev Outlet" represents the simulated pressure result at the previous pressure at the check valve outlet (referring to the simulation result when a water hammer elimination tank is not installed), "Inlet" represents the simulated pressure result at the check valve inlet (referring to the simulation result when a water hammer elimination tank is installed), and "Prev Inlet" represents the simulated pressure result at the previous pressure at the check valve inlet (referring to the simulation result when a water hammer elimination tank is not installed).

[0067] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0068] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” 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.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0071] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water delivery pipe system that is protected from water hammers, characterized in that, include: Water pipeline; A pumping device (1) for pumping water into the water pipeline; A pressurizing device (2) for increasing the water pressure in the middle of the water pipeline; The water pipeline is connected to the outlet of the pumping device (1) with a first check valve (3), a first water hammer relief valve (4) and a first water hammer elimination tank (5), and to the outlet of the pressurizing device (2) with a second check valve (6), a second water hammer relief valve (7) and a second water hammer elimination tank (8), and a number of water hammer air valves (9) are provided along the water pipeline.

2. The water delivery conduit system of claim 1, wherein, There are multiple pressurizing devices (2), and the multiple pressurizing devices (2) are arranged in parallel.

3. The water delivery conduit system of claim 2, wherein, The second check valve (6) and the second water hammer relief valve (7) are provided in multiple ways corresponding to the pressurization device (2), and the second water hammer elimination tank (8) is provided in one way; After the outlet of each pressurizing device (2) is connected to the corresponding second check valve (6) and second water hammer relief valve (7), it is connected to the same second water hammer elimination tank (8).

4. The water delivery conduit system of claim 1, wherein, The water supply pipeline includes a first main pipe (11) and a second main pipe (12). The first main pipe (11) is connected to the outlet of the pumping device (1) and the inlet of the pressurizing device (2). One end of the second main pipe (12) is connected to the outlet of the pressurizing device (2), and the other end is connected to the end storage tank (15). The diameter of the second main pipe (12) is smaller than the diameter of the first main pipe (11).

5. The water delivery conduit system of claim 4, wherein, A central water storage tank (14) is connected in series between the first main pipe (11) and the pressurizing device (2).

6. A water delivery conduit system as claimed in any one of claims 1-5, characterized in that The water pumping device (1) comprises a horizontal volute double-suction water supply pump with a rated flow of 0 m 3 / h~687 m 3 / h, a rated head of 115 m~155 m, and a rated power of 30 kW~409 kW.

7. A water delivery conduit system as claimed in any one of claims 1 to 5 wherein, The pressurizing device (2) comprises a horizontal centrifugal pump with a rated flow of 0 m 3 / h~368m 3 / h, a rated head of 75 m~125 m, and a rated power of 15 kW~172 kW.

8. A water delivery conduit system as claimed in any one of claims 1 to 5 wherein, The first water hammer relief valve (4) and the second water hammer relief valve (7) have a diameter of DN80 and a relief pressure of 1.6MPa.

9. A water delivery conduit system as claimed in any one of claims 1 to 5 wherein, The first check valve (3) and the second check valve (6) are both quick-closing check valves, and the pressure rating is not less than 1.6 MPa.

10. A water delivery conduit system as claimed in any one of claims 1 to 5, wherein, Between the first water hammer elimination tank (5) and the second water hammer elimination tank (8), a number of first water hammer air valves (9-1a) with a pressure rating of 1.6 MPa and a number of second water hammer air valves (9-1b) with a pressure rating of 1.0 MPa are provided along the water pipeline, and the first water hammer air valve (9-1a) is located upstream of the second water hammer air valve (9-1b). Downstream of the second water hammer elimination tank (8), a number of third water hammer air valves (9-2a) with a pressure rating of 1.6 MPa and a number of fourth water hammer air valves (9-2b) with a pressure rating of 1.0 MPa are installed along the water pipeline, and the third water hammer air valves (9-2a) are located upstream of the fourth water hammer air valves (9-2b).

Images