PPR damping and silencing pipe fitting

Abstract

The utility model relates to pipe fitting technical field especially relates to a kind of PPR shock-absorbing silencing pipe fittings with quick response, space compact and long-acting durable, including outer tube, inner tube, threaded connection mouth, end cover, connecting seat, piston rod, piston and guide plate, the threaded connection mouth is threadedly connected in the axial one end of outer tube, the connecting seat is located in outer tube, the outer tube is equipped with exhaust hole, the connecting hole that is equipped with in the connecting seat is connected with exhaust hole, the end cover is threadedly connected in the axial other end of outer tube, the inner tube is located in outer tube, and it is coaxially distributed with outer tube, the axial both ends of the inner tube are respectively equipped on end cover and connecting seat, flow passage is formed between the inner tube and outer tube, the axial both sides of the inner tube distribution are equipped with first through-hole and second through-hole with flow passage intercommunication, the piston is slidably located on connecting seat, the guide plate is fixedly located on the one end of piston rod close to threaded connection mouth, gas collection cavity is formed between the guide plate and connecting seat.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, and in particular to a PPR vibration damping and noise reduction pipe fitting. Background Technology

[0002] In the fields of municipal water supply and industrial fluid transportation, the frequent opening and closing of safety valves due to pressure fluctuations in tap water pipelines has become a common problem in the industry. When the pipeline pressure exceeds the safety threshold, the instantaneous opening of traditional safety valves causes a sudden release of high-pressure water jets. This rapid change in fluid state triggers multiple chain reactions: from a fluid dynamics perspective, the unsteady flow generated during the pressure relief process creates strong pressure shock waves, and this water hammer effect is converted into mechanical vibration through solid conduction in the pipe wall; from a structural mechanics perspective, the repeated collisions between the valve disc and the valve seat during opening and closing not only generate pulse noise but also lead to the accumulation of axial displacement of the valve stem guide mechanism; from a materials science perspective, long-term vibration accelerates the fatigue failure of sealing materials and induces stress corrosion cracks in flange connections. Existing solutions, such as increasing spring preload or installing external shock absorbers, often come at the cost of sacrificing valve sensitivity or increasing installation space, and are difficult to cope with chloride ion corrosion in tap water. More seriously, this vibration can be transmitted to related equipment such as water pumps through the pipeline network. The industry urgently needs to develop integrated vibration damping solutions that combine rapid response, compact size, and long-term durability. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model provides a PPR vibration damping and noise reduction pipe fitting with fast response, compact space and long-lasting durability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A PPR vibration damping and noise reduction pipe fitting includes an outer cylinder, an inner cylinder, a threaded connection port, an end cap, a connecting seat, a piston rod, a piston, and a guide plate. The threaded connection port is threaded to one axial end of the outer cylinder. The connecting seat is located inside the outer cylinder. The outer cylinder has an exhaust hole, and the connecting seat has a connection hole connected to the exhaust hole. The end cap is threaded to the other axial end of the outer cylinder. The inner cylinder is located inside the outer cylinder and is coaxially distributed with the outer cylinder. The two axial ends of the inner cylinder are respectively located on the end cap and the connecting seat. A flow channel is formed between the inner cylinder and the outer cylinder. The inner cylinder has axially distributed... The device has a first through hole and a second through hole communicating with the flow channel. The piston is slidably mounted on the connecting seat. The guide plate is fixedly mounted on one end of the piston rod near the threaded connection port. A gas collecting chamber is formed between the guide plate and the connecting seat. The guide plate has a guide hole communicating with the gas collecting chamber. The piston is fixedly mounted on the other end of the piston rod and distributed between the first through hole and the second through hole. The inner cylinder is filled with damping oil. An annular groove is recessed on the circumferential surface of the piston rod and located in the gas collecting chamber. When the piston rod is squeezed and slides inward, the annular groove connects the gas collecting chamber and the connecting hole.

[0006] Furthermore, the inner cylinder is provided with a honeycomb plate, which divides the inner cylinder into an upper chamber and a lower chamber. The honeycomb plate has honeycomb holes, which connect the upper chamber and the lower chamber.

[0007] Furthermore, the end cap has a threaded hole in the middle, and an adjusting screw is threaded onto the threaded hole. The inner end of the adjusting screw has a head, and the flow diameter of the first through hole is adjusted by rotating the adjusting screw.

[0008] Furthermore, the outer end of the threaded connection port extends outward with an extension portion, and the circumferential surface of the extension portion is provided with an external thread.

[0009] Furthermore, the outer end of the adjusting screw is recessed with an internal hexagonal hole.

[0010] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This PPR shock-absorbing and noise-reducing pipe fitting, through the flow channel structure formed by the outer cylinder and the inner cylinder combined with damping oil filling, realizes the gradient release of fluid pressure, effectively suppressing the pressure oscillation waves generated by the water hammer effect; the linkage design of the piston rod annular groove and the air collection chamber can quickly respond to pressure fluctuations, avoiding the mechanical collision noise of traditional safety valves. At the same time, air in the water enters the air collection chamber through the guide hole on the guide plate, and is then squeezed and slid by the piston rod, and discharged through the annular groove connecting the connection hole and the exhaust hole; moreover, the PPR material has the characteristics of resistance to chloride ion corrosion, extending the service life of the pipe fitting in the tap water environment. This structure is compact and reduces the installation space. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of an embodiment of the present utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model. Detailed Implementation

[0013] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0014] The embodiment of this utility model is as follows:

[0015] refer to Figure 1 and Figure 2 As shown, a PPR vibration damping and noise reduction pipe fitting includes an outer cylinder 1, an inner cylinder 2, a threaded connection port 3, an end cap 4, a connecting seat 5, a piston rod 6, a piston 7, and a guide plate 8. The threaded connection port 3 is threaded to one axial end of the outer cylinder 1. The connecting seat 5 is located inside the outer cylinder 1. The outer cylinder 1 has an exhaust hole 9, and the connecting seat 5 has a connecting hole 10 connected to the exhaust hole 9. The end cap 4 is threaded to the other axial end of the outer cylinder 1. The inner cylinder 2 is located inside the outer cylinder 1 and is coaxially distributed with the outer cylinder 1. The two axial ends of the inner cylinder 2 are respectively located on the end cap 4 and the connecting seat 5. A flow channel 11 is formed between the inner cylinder 2 and the outer cylinder 1. The inner cylinder 2 has guide plates distributed on both axial sides. The piston 7 is slidably mounted on the connecting seat 5 and the first through hole 12 and the second through hole 13 are connected to the flow channel 11. The guide plate 8 is fixedly mounted on the piston rod 6 near the threaded connection port 3. The guide plate 8 and the connecting seat 5 form a gas collecting cavity 14. The guide plate 8 is provided with a gas guide hole 15 that communicates with the gas collecting cavity 14. The piston 7 is fixedly mounted on the other end of the piston rod 6 and distributed between the first through hole 12 and the second through hole 13. The inner cylinder 2 is filled with damping oil. The piston rod 6 has an annular groove 16 recessed on its circumferential surface and located in the gas collecting cavity 14. When the piston rod 6 is squeezed and slides inward, the annular groove 16 connects the gas collecting cavity 14 and the connecting hole 10.

[0016] This PPR vibration-damping and noise-reducing pipe fitting utilizes the flow channel 11 structure formed by the outer cylinder 1 and the inner cylinder 2, combined with damping oil filling, to achieve gradient release of fluid pressure and effectively suppress pressure oscillation waves generated by water hammer. The linkage design of the annular groove 16 of the piston rod 6 and the air collection chamber 14 can quickly respond to pressure fluctuations, avoiding the mechanical collision noise of traditional safety valves. At the same time, air in the water enters the air collection chamber 14 through the guide hole 15 on the guide plate 8, and is then squeezed and slid by the piston rod 6, and discharged through the connecting hole 10 and the vent hole 9 connected by the annular groove 16. Furthermore, the PPR material has chloride ion corrosion resistance, extending the service life of the pipe fitting in tap water environments. This compact structure reduces installation space.

[0017] Furthermore, the inner cylinder 2 is provided with a honeycomb plate 17, which divides the inner cylinder 2 into an upper chamber 18 and a lower chamber 19. The honeycomb plate 17 has honeycomb holes 20, which connect the upper chamber 18 and the lower chamber 19. The honeycomb plate 17 divides the inner cylinder 2 into upper and lower chambers, and the honeycomb holes 20 form a multi-level buffer channel to further disperse the fluid impact energy. The honeycomb structure increases the flow channel surface area, improves the shear energy dissipation efficiency of the damping oil, and enhances the shock absorption effect.

[0018] Furthermore, the end cap 4 has a threaded hole in the middle, and an adjusting screw 21 is threaded onto the threaded hole. The inner end of the adjusting screw 21 has a head 22. The flow diameter of the first through hole 12 can be adjusted by rotating the adjusting screw 21. Specifically, rotating the adjusting screw 21 causes the plug 22 to move along the axial direction of the inner cylinder 2, so that the plug 22 blocks the first through hole 12. The adjusting screw 21 can dynamically adjust the flow diameter of the first through hole 12 to adapt to the pressure relief requirements under different pressure conditions.

[0019] Meanwhile, the outer end of the threaded connection port 3 extends outward to have an extension 23, and the circumferential surface of the extension 23 is provided with an external thread 24. The external thread 24 of the extension 23 is designed to enhance the connection and sealing between the pipe fitting and the pipeline system, and prevent the interface from loosening and leaking due to pressure fluctuations.

[0020] Furthermore, the outer end of the adjusting screw 21 is recessed with an internal hexagonal hole 25. The standardized interface of the internal hexagonal hole 25 facilitates adjustment using general-purpose tools, reducing reliance on specialized tools for installation and maintenance.

[0021] 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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly 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 part; 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 according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A PPR shock absorbing sound attenuating pipe fitting, characterized by: The system includes an outer cylinder, an inner cylinder, a threaded connection port, an end cap, a connecting seat, a piston rod, a piston, and a guide plate. The threaded connection port is threaded to one axial end of the outer cylinder. The connecting seat is located inside the outer cylinder. The outer cylinder has an exhaust hole, and the connecting seat has a connecting hole connected to the exhaust hole. The end cap is threaded to the other axial end of the outer cylinder. The inner cylinder is located inside the outer cylinder and is coaxially distributed with it. The two axial ends of the inner cylinder are respectively located on the end cap and the connecting seat. A flow channel is formed between the inner cylinder and the outer cylinder. Connecting plates are distributed on both axial sides of the inner cylinder to the flow channel. The piston is slidably mounted on the connecting seat, and the guide plate is fixedly mounted on one end of the piston rod near the threaded connection port. A gas collecting cavity is formed between the guide plate and the connecting seat. The guide plate is provided with a gas guide hole communicating with the gas collecting cavity. The piston is fixedly mounted on the other end of the piston rod and distributed between the first and second through holes. The inner cylinder is filled with damping oil. An annular groove is recessed on the circumferential surface of the piston rod and located in the gas collecting cavity. When the piston rod is squeezed and slides inward, the annular groove connects the gas collecting cavity and the connecting hole.

2. The PPR vibration dampening silencer pipe according to claim 1, wherein: The inner cylinder is equipped with a honeycomb plate, which divides the inner cylinder into an upper chamber and a lower chamber. The honeycomb plate has honeycomb holes, which connect the upper chamber and the lower chamber.

3. The PPR vibration damping silencing pipe according to claim 1 or 2, characterized in that: The end cap has a threaded hole in the middle, and an adjusting screw is threaded onto the threaded hole. The inner end of the adjusting screw has a head, and the flow diameter of the first through hole is adjusted by rotating the adjusting screw.

4. The PPR vibration damping and noise reduction pipe fitting according to claim 3, characterized in that: The outer end of the threaded connection port extends outward with an extension portion, and the circumferential surface of the extension portion is provided with external threads.

5. The PPR vibration damping and noise reduction pipe fitting according to claim 3, characterized in that: The outer end of the adjusting screw is recessed with an internal hexagonal hole.

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