A self-cleaning water hammer eliminater

Abstract

This utility model discloses a self-cleaning water hammer eliminator, comprising a housing, a connecting flange fixedly installed at the bottom, a piston baffle fixedly installed inside the housing, a piston disc overlapping the top of the piston baffle, an installation groove on the surface of the piston disc, a piston sealing ring fixedly installed inside the installation groove, a connecting assembly on the top of the housing, and an installation pipe connected to the top of the housing via the connecting assembly, with an air injection needle valve fixedly installed on the installation pipe. This eliminates the need to remove the water hammer eliminator from its installation position for cleaning, avoiding the excessive manpower and time wasted in the disassembly-cleaning-reinstallation process. This allows the water hammer eliminator to be used in process fluids that easily crystallize or contain solid impurities, improving its applicability and extending its service life. The housing of the water hammer eliminator can be lined with ceramic if necessary to prevent wear and impurity accumulation, and is easy to clean.

Description

Technical Field

[0001] This utility model relates to the field of water hammer eliminators, and in particular to a self-cleaning water hammer eliminator. Background Technology

[0002] Water hammer (or water shock) is a phenomenon caused by a rapid change in the flow velocity in a pressure pipeline due to some external factor, resulting in a rapid and alternating rise and fall in liquid pressure. This pressure exerted on valves, pipe walls, or other pipeline components feels like a hammer blow, hence the name water hammer. Water hammer is prone to occur in industrial water systems where valves control flow, or in liquid transport systems when pumps are opened and closed. When water hammer occurs, the enormous kinetic energy of the liquid in the pipeline system acts on rigid pipes and fittings. This energy cannot be released, leading to pipeline vibration and noise, damaging pipes, valves, and pumps.

[0003] When process conditions prevent the installation of a slow-closing check valve, or when the system flow rate exceeds the regulating capacity of the slow-closing check valve, the water hammer impact caused by pump shutdown or rapid valve closure is too large. In such cases, a water hammer eliminator must be installed to ensure system safety. After installing a water hammer eliminator, the enormous kinetic energy of the liquid can be converted by the piston compressing air, reducing the destructive force of the water hammer. This effectively eliminates pipeline vibration and noise, protecting the pipeline network and pumps.

[0004] Currently, commonly used water hammer eliminators mainly include piston-type and airbag-type water hammer eliminators. These can only be applied to relatively clean media such as fire fighting and high-rise building water supply. For process fluids that easily crystallize or contain solid impurities, after repeated pump start-ups and shutdowns, impurities easily accumulate inside the water hammer eliminator, leading to piston jamming and failure. Traditional solutions require frequent disassembly and cleaning, resulting in high maintenance costs and significantly shortened piston assembly lifespan due to impurity wear (30%-50% less than in clean operating conditions). Addressing this industry pain point, this application innovatively develops a water hammer eliminator with a self-cleaning function. Through online flushing and sewage discharge components, it achieves maintenance without disassembly, extending the equipment's lifespan to more than twice that of conventional products. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a self-cleaning water hammer eliminator to solve the aforementioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A self-cleaning water hammer eliminator includes a housing, a connecting flange fixedly installed at the bottom of the housing, a piston baffle fixedly installed inside the housing, a piston disc overlapping the top of the piston baffle, an installation groove formed on the surface of the piston disc, a piston sealing ring fixedly installed inside the installation groove, a connecting assembly installed at the top of the housing, an installation pipe connected to the top of the housing via the connecting assembly, an air injection needle valve fixedly installed on the installation pipe, a pressure gauge fixedly installed at the top of the installation pipe, and a sewage discharge assembly installed on the right side of the housing.

[0007] Preferably, the connecting assembly includes a connecting plate fixedly installed at the top of the housing, a connecting groove is provided at the top of the connecting plate, a sealing gasket is overlapped inside the connecting groove, a sealing cover is overlapped at the top of the connecting plate, a metal sealing ring is fixedly provided at the bottom of the sealing cover, the metal sealing ring overlaps with the connecting groove and the sealing gasket, the sealing cover and the connecting plate are fixed together by bolts, an installation hole is provided through the top of the housing, an installation tube is fixedly installed inside the installation hole, and a cleaning assembly is provided at the top of the sealing cover.

[0008] Preferably, the cleaning assembly includes a connecting hole through which the top of the sealing cover is provided, a cleaning tube is fixedly provided inside the connecting hole, a solenoid valve is fixedly provided on the surface of the cleaning tube, and a threaded joint is fixedly provided at the left end of the cleaning tube.

[0009] Preferably, the sewage discharge assembly includes a fixed sewage outlet and a sewage pipe. The sewage outlet is disposed through the right side of the housing, and the sewage pipe is fixedly installed on the right side of the housing. A solenoid valve is fixedly installed on the surface of the sewage pipe, and a threaded joint is fixedly provided at the right end of the sewage pipe.

[0010] Preferably, the drain outlet and the drain pipe are horizontally aligned, and the longitudinal section of the drain outlet is funnel-shaped.

[0011] Preferably, there are two mounting slots and two piston seals, and the two mounting slots and two piston seals are arranged in a linear array. The piston seals are made of rubber.

[0012] Preferably, the connecting plate and the sealing cover are of the same specifications, and both the connecting plate and the sealing cover are made of stainless steel.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: This water hammer eliminator, through the design of cleaning and drainage components, allows for cleaning without disassembling the eliminator itself, without affecting the operation of the entire device. It ensures that the water hammer eliminator can clean up attached impurities on its own, avoiding the need for disassembly for cleaning and maintenance. This avoids the excessive manpower and time spent on disassembly, cleaning, and reassembly, thus making this water hammer eliminator suitable for process fluids that easily crystallize or contain solid impurities, improving its applicability and extending its service life. Attached Figure Description

[0014] Figure 1 This is an isometric drawing of the structure of this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the piston and seal structure of this utility model; Figure 4 This is a schematic diagram of the connecting component structure of this utility model; Figure 5 This is a schematic diagram of the sealing cover structure of this utility model.

[0015] In the diagram: 1. Housing; 2. Connecting flange; 3. Piston baffle; 4. Piston disc; 5. Mounting groove; 6. Piston sealing ring; 7. Connecting plate; 8. Connecting groove; 9. Sealing gasket; 10. Sealing cover plate; 11. Metal sealing ring; 12. Mounting hole; 13. Connecting hole; 14. Mounting pipe; 15. Injection needle valve; 16. Pressure gauge; 17. Cleaning pipe; 18. Threaded connector one; 19. Drain outlet; 20. Drain pipe; 21. Threaded connector two. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Refer to Figure 1-5A self-cleaning water hammer eliminator includes a housing 1, a connecting flange 2 fixedly mounted at the bottom of the housing 1, a piston baffle 3 fixedly mounted inside the housing 1, a piston disc 4 overlapping the top of the piston baffle 3, an mounting groove 5 formed on the surface of the piston disc 4, and a piston sealing ring 6 fixedly mounted inside the mounting groove 5. There are two mounting grooves 5 and two piston sealing rings 6, and both are arranged in a linear array. The piston sealing rings 6 are made of rubber. A connecting assembly is provided at the top of the housing 1, and the top of the housing 1 is connected via a connecting... The assembly includes an installation tube 14, on which an injection needle valve 15 is fixedly installed. A pressure gauge 16 is fixedly installed at the top of the installation tube 14. A sewage discharge assembly is located on the right side of the housing 1. The cleaning assembly includes a connection hole 13 that penetrates the top of the sealing cover plate 10. A cleaning tube 17 is fixedly installed inside the connection hole 13. A solenoid valve is fixedly installed on the surface of the cleaning tube 17. A threaded connector 18 is fixedly installed at the left end of the cleaning tube 17. The sewage discharge assembly includes a fixed sewage outlet 19 and a sewage pipe 20. The sewage outlet 19 penetrates the right side of the housing 1. Fixedly installed on the right side of the housing 1, the drain outlet 19 and the drain pipe 20 are horizontally aligned. The longitudinal section of the drain outlet 19 is funnel-shaped. A solenoid valve is fixedly installed on the surface of the drain pipe 20, and a threaded connector 21 is fixedly installed at the right end of the drain pipe 20. When solid particles accumulate and clog the inside of the housing 1, making it difficult for the piston disc 4 and the mounting groove 5 to move up and down flexibly and thus failing to eliminate water hammer, the external conveying pipe delivers clean water to the inside of the cleaning pipe 17 through the threaded connector 18, and the water flow washes away the attached fixed particles. Meanwhile, it is connected to the external return pipe through threaded connector 21. The flushing water flows into the drain pipe 20 through the drain port 19 and is then transported to the external return pipe through threaded connector 21. This avoids the need to remove the water hammer eliminator from its installation position before cleaning it, and avoids the excessive time spent on disassembly, cleaning and reinstallation. As a result, the water hammer eliminator can be used in process fluids that are prone to crystallization or contain solid impurities, thus improving the applicability of the water hammer eliminator. The self-cleaning function also makes its service life longer.

[0018] Specifically, the connecting assembly includes a connecting plate 7 fixedly installed at the top of the housing 1. A connecting groove 8 is formed at the top of the connecting plate 7, and a sealing gasket 9 is overlapped inside the connecting groove 8. A sealing cover plate 10 is overlapped at the top of the connecting plate 7, and a metal sealing ring 11 is fixedly installed at the bottom of the sealing cover plate 10. The metal sealing ring 11 overlaps with both the connecting groove 8 and the sealing gasket 9. The sealing cover plate 10 and the connecting plate 7 are fixed together with bolts. The connecting plate 7 and the sealing cover plate 10 have the same specifications and are both made of stainless steel. A mounting hole 12 is provided through the top of the housing 1, and a mounting tube 14 is fixedly installed inside the mounting hole 12. A cleaning assembly is provided at the top of the sealing cover plate 10. When it is determined that the piston disc 4 needs maintenance, the fixed assembly will be... Remove the bolts from the connecting plate 7 and the sealing cover plate 10, remove the sealing cover plate 10 from the top of the connecting plate 7, and use the sealing cover plate 10 to move the metal sealing ring 11 out of the connecting groove 8. Then, the piston disc 4 inside the housing 1 can be removed for inspection. After inspection, place the sealing cover plate 10 on top of the connecting plate 7, so that the metal sealing ring 11 is inserted into the connecting groove 8. Fix the connecting plate 7 and the sealing cover plate 10 with bolts, so that the metal sealing ring 11 squeezes the sealing gasket 9. This allows for quick disassembly of the water hammer eliminator. When the water hammer eliminator needs to be inspected or parts replaced, there is no need to disassemble the entire pipeline. Just loosen the bolts to open the sealing cover plate 10, which greatly shortens maintenance time and improves inspection speed.

[0019] In use: The housing 1 is installed on the pipeline via the connecting flange 2. When water hammer waves enter the housing 1, they act on the piston disc 4. The piston disc 4 drives the mounting groove 5 to move towards the gas chamber. Under the combined action of a certain pressure of gas and irregular water hammer, the piston disc 4 and the mounting groove 5 move up and down, forming a dynamic balance, thereby eliminating the irregular water hammer wave oscillation. After a period of operation, solid particles are prone to deposit and blockage at the contact points between the housing 1 and the piston disc 4 and the mounting groove 5. When the water hammer is too large, solid particles may also deposit inside the housing 1, making it impossible for the piston disc 4 and the mounting groove 5 to move up and down flexibly, thus leading to failure. Connector 18 connects to an external delivery pipe, through which clean water is delivered to the cleaning pipe 17. The water then flows through the cleaning pipe 17 into the housing 1, rinsing away attached solid particles. Simultaneously, threaded connector 21 connects to an external return pipe, through which the rinsing water flows through the drain port 19 into the drain pipe 20, and then through the drain pipe 20 back into the external return pipe, connecting to the existing main pipeline. After cleaning, compressed air is delivered to the cleaning pipe 17 through the external delivery pipe, and then through the cleaning pipe 17 to blow-dry the housing 1, keeping it dry. This completes the cleaning process. Cleaning can be performed during equipment maintenance.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning water hammer eliminator, comprising a housing (1), characterized in that, A connecting flange (2) is fixedly installed at the bottom of the housing (1). A piston baffle (3) is fixedly installed inside the housing (1). A piston disc (4) is overlapped at the top of the piston baffle (3). An installation groove (5) is opened on the surface of the piston disc (4). A piston sealing ring (6) is fixedly installed inside the installation groove (5). A connecting assembly is installed at the top of the housing (1). An installation pipe (14) is installed at the top of the housing (1) through the connecting assembly. An air injection needle valve (15) is fixedly installed on the installation pipe (14). A pressure gauge (16) is fixedly installed at the top of the installation pipe (14). A sewage discharge assembly is installed on the right side of the housing (1). The connecting assembly includes a connecting plate (7) fixedly installed at the top of the housing (1). A connecting groove (8) is opened at the top of the connecting plate (7). A sealing gasket (9) is overlapped inside the connecting groove (8). A sealing cover plate (10) is overlapped at the top of the connecting plate (7). A metal sealing ring (11) is fixedly installed at the bottom of the sealing cover plate (10). The metal sealing ring (11) overlaps with the connecting groove (8) and the sealing gasket (9). The sealing cover plate (10) and the connecting plate (7) are fixed together by bolts. The top of the housing (1) has a through-hole (12). The mounting tube (14) is fixedly installed inside the mounting hole (12). The top of the sealing cover plate (10) is provided with a cleaning assembly. The cleaning assembly includes a through-hole (13) at the top of the sealing cover plate (10). A cleaning assembly is fixedly installed inside the through-hole (13). The cleaning pipe (17) is fixedly provided with a solenoid valve on its surface. A threaded connector (18) is fixedly provided at the left end of the cleaning pipe (17). The sewage discharge assembly includes a fixed sewage discharge port (19) and a sewage discharge pipe (20). The sewage discharge port (19) is provided through the right side of the housing (1). The sewage discharge pipe (20) is fixedly installed on the right side of the housing (1). A solenoid valve is fixedly installed on the surface of the sewage discharge pipe (20). A threaded connector (21) is fixedly provided at the right end of the sewage discharge pipe (20).

2. The self-cleaning water hammer eliminator according to claim 1, characterized in that, The drain outlet (19) and the drain pipe (20) are horizontally aligned, and the longitudinal section of the drain outlet (19) is trumpet-shaped.

3. The self-cleaning water hammer eliminator according to claim 1, characterized in that, The number of mounting grooves (5) and piston seals (6) are both two, and the two mounting grooves (5) and the two piston seals (6) are arranged in a linear array. The piston seals (6) are made of rubber.

4. A self-cleaning water hammer eliminator according to claim 1, characterized in that, The connecting plate (7) and the sealing cover plate (10) have the same specifications, and both the connecting plate (7) and the sealing cover plate (10) are made of stainless steel.

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