Piston water hammer mitigation device

Abstract

The embodiment of the present application provides a piston type water hammer slow release device, and relates to the technical field of water hammer slow release devices, and has the effects of protecting pipelines and prolonging the service life of pipeline assemblies. The device comprises a valve housing, a valve core seat, a spring, a spring seat, a valve core support plate, a valve core and a transition pipe. The valve core seat is fixedly connected with the valve housing. The spring seat is connected with the valve core seat through threads. The spring pressure is adjusted through the rotating spring seat. The lower valve core support plate moves under the action of the spring force. The valve core support plate pushes the corresponding valve core to move. The transition pipe is arranged between the valve housings and is connected through flanges.

Description

Technical Field

[0001] This invention relates to the field of water hammer slow-release devices, and more particularly to a piston-type water hammer slow-release device. Background Technology

[0002] During fluid transport in pipelines, water hammer can occur due to sudden cessation of flow. Because of the significant impact force of water hammer, it can damage or destroy connecting equipment within the pipeline. Current pipeline designs utilize accumulators such as CN107842646A or water hammer protection valves such as CN208381402U to absorb, release, or store the kinetic energy of water hammer, or to eliminate water hammer impact through pipeline depressurization.

[0003] like Figure 1 As shown, the accumulator CN107842646A mainly consists of two components: a shell 11 and an expandable inner liner 12, an inflation valve 111, a pressure relief valve 112, and a connecting pipe. Figure 2 As shown, when water hammer occurs in the pipeline, the accumulator draws the water hammer pressure into the expandable inner liner 12, compressing the air between the expandable inner liner 12 and the shell 11, increasing the pressure. When the pipeline pressure decreases, the expandable inner liner 12 contracts, and the fluid in the accumulator is squeezed back into the pipeline.

[0004] like Figure 3 As shown, the water hammer protection valve CN208381402U mainly consists of valve body 1, valve stem 2, large valve disc 3, small valve disc 4, guide seat 5, upper cavity 6, lower cavity 7, inlet valve 8, outlet valve 9, valve cover 10, and guide pillars 11 and 12. When the flow entering the protection valve from inlet valve 8 is normal, valve discs 3 and 4 are normally open; if... Figure 4 As shown, when the flow from the inlet valve 8 into the protective valve stops, valve discs 3 and 4 close, thereby blocking the flow and isolating water hammer.

[0005] Combination Figure 1 and Figure 2 Because tank-type accumulators often have built-in compressed air bladders, the overall structure is relatively large and occupies a significant amount of space, requiring a certain amount of space for installation. The accumulator's regulating valve is located at the top, making adjustment and maintenance more demanding. The air bladder inside the accumulator is prone to damage due to long-term deformation and needs periodic replacement.

[0006] Combination Figure 3 and Figure 4 Water hammer protection valves can only block pressure transmission in one direction. When water hammer reaches the walls of valve discs 3 and 4, the pressure will be transmitted in the opposite direction. Water hammer protection valves can only protect upstream pipeline equipment from water hammer impact, but they do not protect downstream pipeline equipment. Furthermore, the diaphragm inside the valve cavity is prone to deformation and damage over time, requiring regular replacement. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention proposes a piston-type water hammer slow-release device. By isolating and gradually releasing water hammer that occurs in the pipeline, it can protect the pipeline and extend the life of pipeline components. It has advantages such as small size, simple structure, and durable use.

[0008] The present invention adopts the following technical solution:

[0009] A piston-type water hammer slow-release device includes: a valve body, a valve core seat, a spring, a spring seat, a valve core support plate, a valve core, and a transition pipe; the valve core seat is fixedly connected to the valve body, the spring seat is threadedly connected to the valve core seat, and the spring pressure is adjusted by rotating the spring seat; under the action of the spring force, the valve core support plate moves, and the valve core support plate pushes the corresponding valve core to move; the transition pipe is provided between the valve bodies and is connected by a flange.

[0010] The valve core includes: a hydraulic plate, a closed ring, a coarse limiting rod, and a fine limiting rod; the hydraulic plate includes four pieces, which are evenly distributed in the closed ring in the circumferential direction; one end of the hydraulic plate is fixedly connected to the closed ring, and the other end is connected to one end of the coarse limiting rod; the other end of the coarse limiting rod is connected to one end of the fine limiting rod.

[0011] The valve spring seat includes: a hexagonal bolt head, a threaded seat, and a limiting sleeve; the limiting sleeve is a hollow cylinder; the threaded seat is threadedly connected to the valve core seat, and the spring pressure is installed and adjusted by rotating the hexagonal bolt head; the limiting sleeve houses the thin limiting rod inside and limits it, and the limiting sleeve limits the spring outside.

[0012] The valve body includes: an external pipe connection port, a flow cavity, a valve core slide, and a transition pipe connection port; one end of the external pipe connection port is connected to one end of the flow cavity, and the other end of the flow cavity is connected to one end of the valve core slide; the flow cavity is a hollow cylinder, and the external pipe connection port and the transition pipe connection port are hollow cylinders, with the diameter of the flow cavity being larger than the diameter of the external pipe connection port or the transition pipe connection port; the other end of the external pipe connection port and the other end of the transition pipe connection port both have flange interfaces; the valve core slide is used to restrict the movement direction of the valve core.

[0013] The valve core seat includes: a threaded inner cylinder, a smooth inner cylinder, a valve core slide, an outer wall, and a connecting end;

[0014] The threaded inner cylinder mates with the threaded seat; the smooth inner cylinder houses the valve core support plate, which restricts the direction of movement of the valve core support plate; the valve core slide houses the valve core, which restricts the direction of movement of the valve core; the outer wall is provided with a connecting end for connecting with the housing, and fluid flows between the housing and the outer wall of the valve core seat.

[0015] The transition pipe is a metal pipe with a flange interface.

[0016] The outer diameter of the spring is smaller than the inner diameter of the threaded inner cylinder and the smooth inner cylinder, but larger than the outer diameter of the spring seat limiting cylinder.

[0017] The connection ends include multiple ones, which are evenly distributed along the circumferential direction on the outer wall.

[0018] Beneficial effects:

[0019] This invention provides a piston-type water hammer mitigation device that provides bidirectional isolation of the water hammer, preventing its forward transmission and suppressing its reverse transmission. The valve core is spring-loaded, allowing for rapid water hammer release without impacting the pipeline. Both ends of the valve employ a piston-type core design, with the core reset by a spring. The spring force can be adjusted using a bottom nut. A valve baffle isolates the water hammer between the two valves, preventing its transmission to other equipment in the pipeline. The valve core, under spring pressure, opens the flow channel upon impact with the water hammer, allowing its kinetic energy to be released at a certain speed during oscillation. The spring-loaded baffle provides strong fatigue resistance. The overall valve structure is compact, strong, and highly reliable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an energy storage device in the prior art;

[0021] Figure 2 for Figure 1 The cross-sectional view of the energy storage device shown;

[0022] Figure 3 This is a structural schematic diagram of a water hammer protection valve in the prior art;

[0023] Figure 4 for Figure 3 The diagram shows the liquid flow direction of the water hammer protection valve.

[0024] Figure 5 This is a schematic diagram of the structure of a piston-type water hammer slow-release device under normal conditions, provided in an embodiment of the present invention.

[0025] Figure 6A schematic diagram of the piston-type water hammer slow-release device provided in an embodiment of the present invention when water hammer enters the inlet end and passes through the transition pipe;

[0026] Figure 7 A schematic diagram of the piston-type water hammer mitigation device provided in an embodiment of the present invention after the water hammer impacts the outlet valve core and causes the outlet valve core to close.

[0027] Figure 8 A schematic diagram of the valve core of the piston-type water slow-release device provided in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the valve spring seat of the piston-type water slow-release device provided in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the valve housing of the piston-type water slow-release device provided in an embodiment of the present invention. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] like Figure 5 As shown, the inlet and outlet valves of the piston-type water hammer slow-release device are identical, including valve bodies 11 and 12, valve core seats 21 and 22, springs 31 and 32, spring seats 41 and 42, valve core support plates 51 and 52, valve cores 61 and 62, and a transition pipe 7. Valve core seats 21 and 22 are fixedly connected to valve bodies 11 and 12, respectively. Spring seats 41 and 42 are threadedly connected to valve core seats 21 and 22, respectively. The pressure of springs 31 and 32 can be adjusted by rotating spring seats 41 and 42. Under the action of the spring force, valve core support plates 51 and 52 move, pushing the corresponding valve cores 61 and 62. Valve bodies 11 and 12 are connected to the transition pipe 7 via standard flanges and fixed with bolts.

[0033] Under normal pressure, valve cores 61 and 62 are moved by the thrust of springs 31 and 32, and their movement position is limited by the port of transition pipe 7, so the valve is in the open state. Under normal pipeline transport conditions, both valve core 61 at the inlet end and valve core 62 at the outlet end of the piston-type water hammer mitigation device are in the open state, and the fluid in the pipeline can flow normally.

[0034] Example 2

[0035] like Figure 6As shown, the inlet and outlet valves of the piston-type water hammer mitigation device are identical, including valve bodies 11 and 12, valve core seats 21 and 22, springs 31 and 32, spring seats 41 and 42, valve core support plates 51 and 52, valve cores 61 and 62, and a transition pipe 7. Valve core seats 21 and 22 are fixedly connected to valve bodies 11 and 12, respectively. Spring seats 41 and 42 are threadedly connected to valve core seats 21 and 22, respectively. The pressure of springs 31 and 32 can be adjusted by rotating spring seats 41 and 42. Under the action of the spring force, valve core support plates 51 and 52 move, pushing the corresponding valve cores 61 and 62. Valve bodies 11 and 12 are connected to the transition pipe 7 via standard flanges and secured with bolts. When water hammer enters the inlet end of the piston-type water hammer mitigation device and passes through the transition pipe 7, the outlet valve core 62 moves under the action of water hammer pressure and is limited to its position by valve core seat 22, keeping the valve closed. After the water hammer enters the piston-type water hammer mitigation device, the valve core 61 at the inlet end is in the open state, and the valve core 62 at the outlet end is in the closed state, so the water hammer no longer propagates forward after entering the device.

[0036] Example 3

[0037] like Figure 7 As shown, the inlet and outlet valves of the piston-type water hammer mitigation device are identical, including valve bodies 11 and 12, valve core seats 21 and 22, springs 31 and 32, spring seats 41 and 42, valve core support plates 51 and 52, valve cores 61 and 62, and a transition pipe 7. Valve core seats 21 and 22 are fixedly connected to valve bodies 11 and 12, respectively. Spring seats 41 and 42 are threadedly connected to valve core seats 21 and 22, respectively. The pressure of springs 31 and 32 can be adjusted by rotating spring seats 41 and 42. Under the action of the spring force, valve core support plates 51 and 52 move, pushing the corresponding valve cores 61 and 62 to move. Valve bodies 11 and 12 are connected to the transition pipe 7 via standard flanges and secured with bolts. When water hammer impacts the valve core 62 at the outlet end, causing it to close, the water hammer is transmitted in the reverse direction, reducing the pressure at the valve core 62 at the outlet end, opening the valve core 62, and releasing the pressure in the pipeline. When the water hammer is transmitted in reverse to the valve core 61 at the inlet end, it causes the valve core 61 at the inlet end to close, preventing the inlet valve core from moving in reverse. When the water hammer is transmitted in reverse in the transition pipe, the valve core 62 at the outlet end is in the open state, and the valve core 61 at the inlet end is in the closed state. After the water hammer enters the piston-type water hammer mitigation device, it no longer transmits in reverse.

[0038] Example 4

[0039] like Figure 8As shown, the valve core 61 at the inlet end and the valve core 62 at the outlet end of the piston-type water slow-release device are identical. The valve core includes a hydraulic plate 611, a closing ring 612, a coarse limiting rod 613, and a fine limiting rod 614. In this invention, the valve core is designed with a flow-in direction 8 and a flow-blocking direction 9. When the fluid flows in the flow-in direction 8, the resistance to the fluid is small, and the pressure on the valve core is small. When the fluid flows in the flow-blocking direction 9, the resistance to the fluid is large, and the pressure on the valve core is large.

[0040] Example 5

[0041] like Figure 9 As shown, the inlet valve spring seat 41 and outlet valve spring seat 42 of the piston-type water hammer slow-release device are identical. The spring seat 41 includes a hexagonal bolt head 411, a threaded seat 412, and a limiting cylinder 413. The threaded seat 412 is threadedly connected to the valve core seat, and the spring pressure is installed and adjusted by rotating the hexagonal bolt head 411. The limiting cylinder 413 internally limits the valve core's thin limiting rod 614, and externally limits the spring 31.

[0042] Example 6

[0043] like Figure 10 As shown, the inlet valve housing 11 and the outlet valve housing 12 of the piston-type water hammer slow-release device are identical. The valve housing 11 consists of an external pipe interface 111, a flow chamber 112, a valve core slide 113, and a transition pipe interface 114. The external pipe interface 111 and the transition pipe interface 114 adopt standard flange interfaces of corresponding pipe diameters. The valve core slide 113 is used to restrict the movement direction of the valve core.

[0044] Example 7

[0045] The inlet valve seat 21 and outlet valve seat 22 of the piston-type water hammer slow-release device are identical. The valve seat 21 consists of a threaded inner cylinder, a smooth inner cylinder, a valve core slide, an outer wall, and a connecting end. The threaded inner cylinder is used to connect with the threaded seat 411 of the spring seat, the smooth inner cylinder is used to limit the movement direction of the valve core support plate 51, the valve core slide is used to limit the movement direction of the valve core 61, and the connecting end is used to connect with the housing 11. Fluid flows between the housing 11 and the outer wall.

[0046] In the above embodiments, the transition pipe 7 of the piston-type water hammer slow-release device is a common metal pipe, and the transition pipe 7 adopts a standard flange interface of the corresponding pipe diameter.

[0047] The springs 31 and 32 of the piston-type water hammer slow-release device adopt mature standard products. The outer diameter of springs 31 and 32 should be smaller than the inner diameter of the threaded inner cylinder and the smooth inner cylinder of the valve core seat. The inner diameter of springs 31 and 32 should be larger than the outer diameter of the limit cylinder 413.

[0048] The valve core support plates 51 and 52 of the piston-type water hammer slow-release device are made of general metal cutting parts. The thickness is determined by the overall design characteristics of the device. The outer diameter of the valve core support plates 51 and 52 should be smaller than the inner diameter of the smooth inner cylinder of the valve core seat. The outer diameter of the valve core support plates 51 and 52 should be larger than the inner diameter of the valve core slide of the valve core seat. The inner diameter of the valve core support plates 51 and 52 should be larger than the diameter of the valve core thin limit rod 614. The inner diameter of the valve core support plates 51 and 52 should be smaller than the diameter of the valve core thick limit rod 613.

[0049] This invention provides a piston-type water hammer mitigation device that provides bidirectional isolation of the water hammer, preventing its forward transmission and suppressing its reverse transmission. The valve core is spring-loaded, allowing for rapid water hammer release without impacting the pipeline. Both ends of the valve employ a piston-type core design, with the core reset by a spring. The spring force can be adjusted using a bottom nut. A valve baffle isolates the water hammer between the two valves, preventing its transmission to other equipment in the pipeline. The valve core, under spring pressure, opens the flow channel upon impact with the water hammer, allowing its kinetic energy to be released at a certain speed during oscillation. The spring-loaded baffle provides strong fatigue resistance. The overall valve structure is compact, strong, and highly reliable.

[0050] It will be apparent to those skilled in the art that the embodiments of the present invention are not limited to the details of the exemplary embodiments described above, and that the embodiments of the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the embodiments of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the embodiments of the present invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be encompassed within the embodiments of the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units, modules, or devices recited in the system, apparatus, or terminal claims may also be implemented by the same unit, module, or device through software or hardware.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the embodiments of the present invention should not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A piston-type water hammer slow-release device, characterized in that, The system includes an inlet valve and an outlet valve with identical components. Each inlet valve and outlet valve includes: a valve body (11, 12), a valve core seat (21, 22), a spring (31, 32), a spring seat (41, 42), a valve core support plate (51, 52), and a valve core (61, 62). The valve core seats (21, 22) are fixedly connected to the valve body (11, 12), and the spring seats (41, 42) are threadedly connected to the valve core seats (21, 22). The spring force of the spring (31, 32) is adjusted by rotating the spring seat (41, 42). Under the action of the spring force of the spring (31, 32), the valve core support plate (51, 52) moves, and the valve core support plate (51, 52) pushes the valve core (61, 62) to move. A transition pipe (7) is provided between the inlet valve body (11) and the outlet valve body (12), and is connected by a flange; Under normal pressure conditions, the valve cores of the inlet and outlet valves move under the thrust of their respective springs and are limited in their position by the transition pipe orifice, and the inlet and outlet valves are in the open state. When the water hammer enters the inlet valve end of the piston-type water hammer slow-release device and passes through the transition pipe, the valve core of the outlet valve moves under the action of the water hammer pressure and is limited in its movement position by the valve core seat of the outlet valve, so that the outlet valve is in the closed state and the water hammer no longer passes forward. After the outlet valve is closed, when the water hammer is transmitted in reverse in the transition pipe, the pressure at the outlet valve core decreases, and the outlet valve is opened again. When the water hammer is transmitted in reverse to the inlet valve core, the inlet valve is closed, so that the water hammer enters the piston-type water hammer relief device and is no longer transmitted in reverse.

2. The piston-type water hammer slow-release device according to claim 1, characterized in that, The valve core (61, 62) includes: a hydraulic plate (611), a closed ring (612), a coarse limiting rod (613), and a fine limiting rod (614); the hydraulic plate (611) includes four pieces, which are evenly distributed in the closed ring (612) in the circumferential direction. One end of the hydraulic plate (611) is fixedly connected to the closed ring (612), and the other end is connected to one end of the coarse limiting rod (613); the other end of the coarse limiting rod (613) is connected to one end of the fine limiting rod (614).

3. The piston-type water hammer slow-release device according to claim 2, characterized in that, The spring seat (41, 42) includes: a hexagonal bolt head (411), a threaded seat (412), and a limiting cylinder (413); the limiting cylinder (413) is a hollow cylinder; it is threadedly connected to the valve core seat (21, 22) through the threaded seat (412), and the spring pressure is installed and adjusted by rotating the hexagonal bolt head (411); the limiting cylinder (413) houses the thin limiting rod (614) inside, which limits it, and the limiting cylinder (413) limits the spring (31) outside.

4. The piston-type water hammer slow-release device according to claim 3, characterized in that, The valve body (11, 12) includes: an external pipe connection port (111), a flow cavity (112), a first valve core slide (113), and a transition pipe connection port (114); one end of the external pipe connection port (111) is connected to one end of the flow cavity (112), and the other end of the flow cavity (112) is connected to one end of the first valve core slide (113); the flow cavity (112) is a hollow cylinder, the external pipe connection port (111) and the transition pipe connection port (114) are hollow cylinders, and the diameter of the flow cavity (112) is larger than the diameter of the external pipe connection port (111) or the transition pipe connection port (114); the other end of the external pipe connection port (111) and the other end of the transition pipe connection port (114) both have flange interfaces; the first valve core slide (113) is used to restrict the movement direction of the valve core (61, 62).

5. The piston-type water hammer slow-release device according to claim 4, characterized in that, The valve core seat (21, 22) includes: a threaded inner cylinder, a smooth inner cylinder, a second valve core slide, an outer wall, and a connecting end; The threaded inner cylinder mates with the threaded seat (412); the smooth inner cylinder houses the valve core support plate (51, 52) to restrict the direction of movement of the valve core support plate (51, 52); the second valve core slideway houses the valve core (61, 62) to restrict the direction of movement of the valve core (61, 62); the outer wall is provided with a connecting end for connecting with the valve housing (11, 12), and fluid flows between the valve housing (11, 12) and the outer wall.

6. The piston-type water hammer slow-release device according to claim 5, characterized in that, The transition pipe (7) is a metal pipe and has a flange interface.

7. The piston-type water hammer slow-release device according to claim 6, characterized in that, The outer diameter of the spring (31, 32) is smaller than the inner diameter of the threaded inner cylinder and the smooth inner cylinder, but larger than the outer diameter of the limiting cylinder (413).

8. The piston-type water hammer slow-release device according to claim 6, characterized in that, The connection ends include multiple ones, which are evenly distributed along the circumferential direction on the outer wall.

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