Pressure relief valve with active muffling function

Abstract

The application provides a pressure relief valve with active noise cancellation function, comprising: a valve body, which is formed with a liquid inlet cavity and a pressure relief cavity in communication with each other; a bypass pipe, which is in communication with the liquid inlet cavity; a pressure relief assembly, which comprises an adjusting piece, a pressure relief elastic piece and a pressure relief valve core, the pressure relief valve core and the pressure relief elastic piece are arranged in the pressure relief cavity, the adjusting piece is movably arranged on the valve body, and the pressure relief elastic piece is arranged between the adjusting piece and the pressure relief valve core; a piezoelectric actuator and a noise reduction elastic piece, the piezoelectric actuator is arranged on the liquid inlet cavity, the noise reduction elastic piece is arranged between the driving end of the piezoelectric actuator and the pressure relief valve core, and the piezoelectric actuator is configured to drive the noise reduction elastic piece. The pressure relief valve with active noise cancellation function provided by the application introduces active noise cancellation technology into the pulse noise control of the pressure relief valve by arranging the piezoelectric actuator, and can adjust the force applied to the pressure relief valve core through the noise reduction elastic piece to eliminate the transient noise caused by the pulse pressure when the pressure relief valve core moves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline system vibration and noise reduction, and particularly relates to a pressure relief valve with an active noise reduction function. BACKGROUND

[0002] In existing industrial fluid systems, pressure relief valves, as important safety and control components, are widely used in various equipment and pipelines to prevent system overpressure operation and ensure the safe and stable operation of equipment. However, at the moment when the pressure relief valve opens, due to the sudden change of fluid pressure, strong pulsating pressure is often generated, which in turn causes transient noise. This noise not only affects the working environment, but also can cause damage to equipment and personnel.

[0003] Currently, research on the elimination of pressure relief valve transient noise mainly focuses on the optimization design of valve structure, the optimization of pipeline layout, etc. These measures can reduce noise level to some extent, but the effect is limited, and a large amount of calculation and experimental verification is often required at the initial design stage, which is costly and difficult to directly eliminate the transient noise in existing valve mechanisms. SUMMARY

[0004] The present application provides a pressure relief valve with an active noise reduction function to solve the problem of strong pulsating pressure and transient noise caused by the existing pressure relief valve with an active noise reduction function.

[0005] The present application provides a pressure relief valve with an active noise reduction function, comprising:

[0006] a valve body formed with a liquid inlet cavity and a pressure relief cavity in communication with each other;

[0007] a bypass pipe in communication with the liquid inlet cavity;

[0008] a pressure relief assembly comprising an adjusting member, a pressure relief elastic member, and a pressure relief valve core, the pressure relief valve core and the pressure relief elastic member being arranged in the pressure relief cavity, the adjusting member being movably arranged on the valve body, the pressure relief elastic member being arranged between the adjusting member and the pressure relief valve core, so that the pre-tightening force of the pressure relief elastic member is adjusted by the adjusting member, and the pressure relief valve core is pressed tightly by the pressure relief elastic member to block the liquid inlet cavity and the pressure relief cavity;

[0009] a piezoelectric actuator and a noise reduction elastic member, the piezoelectric actuator being arranged on the liquid inlet cavity, the noise reduction elastic member being arranged between the driving end of the piezoelectric actuator and the pressure relief valve core, the piezoelectric actuator being configured to drive the noise reduction elastic member to eliminate the transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0010] The pressure relief valve with the active noise elimination function further comprises a first sealing cover and a second sealing cover.

[0011] The valve body is provided with a first mounting port and a second mounting port, the first sealing cover is arranged on the first mounting port, and the second sealing cover is arranged on the second mounting port.

[0012] The first sealing cover and one side of the pressure relief valve core separate the valve body to form the pressure relief cavity, and the second sealing cover and the other side of the pressure relief valve core separate the valve body to form the liquid inlet cavity.

[0013] The adjusting member is movably arranged on the first sealing cover, and the piezoelectric actuator is arranged on the second sealing cover.

[0014] The piezoelectric actuator comprises a fastener, a cover plate and a plurality of piezoelectric bodies.

[0015] The second sealing cover is formed with a mounting groove, the piezoelectric bodies are arranged in the mounting groove in layers, the fastener is fixed on the second sealing cover through the plurality of piezoelectric bodies, the cover plate is arranged on the outermost piezoelectric body, and the outer side of the cover plate abuts against the noise reduction elastic member.

[0016] The piezoelectric actuator further comprises a sealing filler, the sealing filler is filled between the outer side of the cover plate and the side wall of the mounting groove, and the sealing filler abuts against the noise reduction elastic member.

[0017] The pressure relief valve with the active noise elimination function further comprises:

[0018] A valve seat is arranged between the liquid inlet cavity and the pressure relief cavity.

[0019] A valve disc is slidably arranged on the valve seat.

[0020] A valve rod is arranged in the valve disc, a first end of the valve rod extends into the pressure relief cavity, and a second end of the valve rod extends into the liquid inlet cavity, and the noise reduction elastic member is arranged between the second end of the valve rod and a driving end of the piezoelectric actuator.

[0021] The pressure relief valve with the active noise elimination function further comprises:

[0022] A throttling sleeve is arranged on the second end of the valve rod, and the noise reduction elastic member is arranged between the throttling sleeve and the driving end of the piezoelectric actuator.

[0023] The pressure relief valve with the active noise cancellation function provided by the present application comprises:

[0024] The adjusting rod is rotatably arranged on the first sealing cover and has a first end outside the valve body and a second end penetrating through the first sealing cover.

[0025] The adjusting end cover is connected to the first end of the adjusting rod.

[0026] The pressure relief valve with the active noise cancellation function provided by the present application further comprises:

[0027] The damping rod is connected to the second end of the adjusting rod.

[0028] The guide sleeve is movably sleeved on the outside of the damping rod and has a first end sleeved on the first end of the valve rod and a second end sleeved on the first end of the valve rod.

[0029] The pressure relief valve with the active noise cancellation function provided by the present application further comprises:

[0030] The pressure sensor is arranged in the liquid inlet cavity and / or the pressure relief cavity and is electrically connected to the piezoelectric actuator.

[0031] The pressure relief valve with the active noise cancellation function provided by the present application further comprises:

[0032] The control unit is electrically connected to the pressure sensor and the piezoelectric actuator, receives the pressure data collected by the pressure sensor, and controls the start and stop of the piezoelectric actuator according to the preset pressure threshold and the pressure data, so as to adjust the driving force of the noise reduction elastic member on the pressure relief valve core.

[0033] The pressure relief valve with the active noise cancellation function provided by the present application introduces the active noise cancellation technology into the pressure relief valve with the active noise cancellation function through the arrangement of the piezoelectric actuator, so as to adjust the force applied on the pressure relief valve core by the noise reduction elastic member, thereby eliminating the transient noise caused by the pulsating pressure when the pressure relief valve core moves. BRIEF DESCRIPTION OF DRAWINGS

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the pressure relief valve with active noise reduction function provided by the present invention.

[0036] Figure 2 yes Figure 1 A schematic diagram of section AA.

[0037] Figure 3 yes Figure 2 An enlarged view of position B in the middle.

[0038] Figure 4 This is a schematic diagram of the structure of the piezoelectric actuator provided by the present invention.

[0039] Figure label:

[0040] 100, Valve body; 110, Pressure relief chamber; 120, Liquid inlet chamber; 200, Bypass pipe; 300, Pressure relief assembly; 310, Adjusting rod; 320, Adjusting end cap; 330, Pressure relief elastic element; 340, Valve seat; 350, Valve disc; 360, Valve stem; 400, Piezoelectric actuator; 410, Fastener; 420, Cover plate; 430, Piezoelectric element; 440, Sealing filler; 500, Noise reduction elastic element; 600, First sealing cover; 700, Second sealing cover; 800, Throttling sleeve; 900, Damping rod; 1000, Guide sleeve. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] This invention provides a pressure relief valve with active silencing function, such as... Figures 1 to 3As shown, the pressure relief valve with active noise reduction function includes: a valve body 100, a bypass pipe 200, a pressure relief assembly 300, a piezoelectric actuator 400, and a noise-reducing elastic element 500. The valve body 100 forms an inlet chamber 120 and a pressure relief chamber 110 that are interconnected; the bypass pipe 200 is connected to the inlet chamber 120; the pressure relief assembly 300 includes an adjusting member, a pressure relief elastic element 330, and a pressure relief valve core. The pressure relief valve core and the pressure relief elastic element 330 are disposed in the pressure relief chamber 110. The adjusting member is movably disposed on the valve body 100, and the pressure relief elastic element 330 is pressed between the adjusting member and the pressure relief valve core to adjust the pressure relief valve core. The preload of the pressure relief elastic element 330 causes the pressure relief valve core to be pressed by the pressure relief elastic element 330 to seal the liquid inlet chamber 120 and the pressure relief chamber 110; the piezoelectric actuator 400 is disposed on the liquid inlet chamber 120, and the noise reduction elastic element 500 is pressed between the drive end of the piezoelectric actuator 400 and the pressure relief valve core. The piezoelectric actuator 400 is configured to drive the noise reduction elastic element 500 to eliminate the transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0043] In this embodiment, the valve body 100 is the main structure of a pressure relief valve with active silencing function, and its interior is designed with an inlet chamber 120 and a pressure relief chamber 110 that are interconnected. These two chambers are used to receive fluid pressure from the system and to release fluid exceeding a set pressure value, respectively. A bypass pipe 200 is connected to the inlet chamber 120 and may be used to guide fluid to other paths when the pressure is low. An adjusting member is movably disposed on the valve body 100 and is used to adjust the preload of the pressure relief elastic member 330. The pressure relief elastic member 330 may be a spring or the like and is disposed between the adjusting member and the pressure relief valve core. By adjusting the preload, the opening or closing of the pressure relief valve core can be controlled, thereby adjusting the operating pressure of the pressure relief valve with active silencing function. The pressure relief valve core is used to block or open the passage between the inlet chamber 120 and the pressure relief chamber 110. When the system pressure exceeds the set value, the pressure relief valve core is pushed open, allowing fluid to flow from the inlet chamber 120 into the pressure relief chamber 110, thereby releasing the pressure. A piezoelectric actuator 400 is mounted on the inlet chamber 120 and its drive end is controlled by an electrical signal. In this design, the piezoelectric actuator 400 drives a noise-reducing elastic element 500 to reduce transient noise generated when the pressure relief valve spool moves. The noise-reducing elastic element 500 is pressed between the drive end of the piezoelectric actuator 400 and the pressure relief valve spool. When the pressure relief valve spool moves, the noise-reducing elastic element 500 can absorb and disperse the resulting vibrations and noise, thereby reducing the noise level.

[0044] Under normal operating conditions, the pressure relief valve core is pressed shut by the pressure relief elastic element 330, sealing the passage between the inlet chamber 120 and the pressure relief chamber 110. When the system pressure rises to the set value, the preload of the pressure relief elastic element 330 is insufficient to maintain the closed state of the pressure relief valve core. Therefore, the pressure relief valve core is pushed open, and fluid begins to flow from the inlet chamber 120 into the pressure relief chamber 110, releasing the pressure. The piezoelectric actuator 400 drives the noise-reducing elastic element 500, which transmits the noise to the pressure relief valve core, causing axial displacement movement and reducing the pulsating noise generated by valve core oscillation.

[0045] The pressure relief valve with active noise reduction function provided in this embodiment of the invention addresses the poor performance of traditional passive pulsating noise suppression. By arranging a piezoelectric actuator 400, an integrated active noise reduction technology is introduced into the pulsating noise control of the pressure relief valve with active noise reduction function. The force applied to the pressure relief valve core can be adjusted by the noise reduction elastic element 500 to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves. In addition, this pressure relief valve with active noise reduction function can replace existing pressure relief valves with active noise reduction function. The adjusting element in the pressure relief assembly 300 allows users to adjust the preload of the pressure relief elastic element 330 as needed, flexibly adjusting the working pressure range of the pressure relief valve with active noise reduction function.

[0046] In some embodiments, such as Figures 1 to 3 As shown, the pressure relief valve with active silencing function further includes: a first sealing cover 600 and a second sealing cover 700; the valve body 100 is provided with a first mounting port and a second mounting port, the first sealing cover 600 is disposed in the first mounting port, and the second sealing cover 700 is disposed in the second mounting port; the first sealing cover 600 and one side of the pressure relief valve core separate the valve body 100 to form a pressure relief chamber 110, and the second sealing cover 700 and the other side of the pressure relief valve core separate the valve body 100 to form a liquid inlet chamber 120; the adjusting element is movably disposed on the first sealing cover 600, and the piezoelectric actuator 400 is disposed on the second sealing cover 700.

[0047] Specifically, the first sealing cap 600 is disposed on the first mounting port of the valve body 100, and together with one side of the pressure relief valve core, separates the internal space of the valve body 100 to form a pressure relief chamber 110. The second sealing cap 700 is disposed on the second mounting port of the valve body 100, and together with the other side of the pressure relief valve core, separates the internal space of the valve body 100 to form a liquid inlet chamber 120. The first sealing cap 600 and the second sealing cap 700 not only serve to separate the spaces, but also ensure that fluid does not leak to the outside of the valve body 100.

[0048] In this embodiment, as Figure 4As shown, the piezoelectric actuator 400 includes: a fastener 410, a cover plate 420, and a plurality of piezoelectric bodies 430; a mounting groove is formed in the second sealing cover 700, the piezoelectric bodies 430 are stacked in the mounting groove, the fastener 410 passes through the plurality of piezoelectric bodies 430 and is fixed on the second sealing cover 700, the cover plate 420 is disposed on the outermost piezoelectric body 430, and the outer side of the cover plate 420 abuts against the noise reduction elastic member 500.

[0049] Specifically, fasteners 410 are used to secure the piezoelectric actuator 400 to the second sealing cover 700. Fasteners 410 are typically one or more bolts, screws, or similar fasteners that pass through the stacked piezoelectric elements 430 and are secured in corresponding threaded holes in the second sealing cover 700. A cover plate 420 is disposed on the outermost piezoelectric element 430 to protect the piezoelectric element 430 and transmit the driving force. The cover plate 420 is typically made of metal or other rigid material to ensure it can withstand the driving force generated by the piezoelectric element 430 and transmit it to the noise-reducing elastic element 500. Multiple piezoelectric elements 430 are stacked within mounting grooves in the second sealing cover 700. The piezoelectric elements 430 are the core components of the piezoelectric actuator 400; they are capable of mechanical deformation (such as elongation or shortening) in response to changes in electrical signals, thereby generating driving force. In this embodiment, multiple piezoelectric elements 430 are stacked together to increase the driving force and / or improve the response speed.

[0050] When an electrical signal is applied to the piezoelectric element 430, the piezoelectric element 430 undergoes mechanical deformation (such as elongation or shortening). Since multiple piezoelectric elements 430 are stacked together, their deformations are superimposed, resulting in a greater driving force. The cover plate 420 transmits the driving force generated by the piezoelectric element 430 to the noise-reducing elastic element 500. The noise-reducing elastic element 500 is then compressed or stretched, thereby acting on the pressure relief valve spool to reduce transient noise generated during its movement.

[0051] To ensure a tight seal, the piezoelectric actuator 400 also includes a sealing filler 440. The sealing filler 440 is used to fill the area outside the cover plate 420 and between the cover plate 420 and the sidewall of the mounting groove. The sealing filler 440 abuts against the noise-reducing elastic element 500. The sealing filler 440 ensures a tight seal between the cover plate 420 and the sidewall of the mounting groove, preventing fluid or gas leakage. The sealing filler 440 not only makes close contact with the cover plate 420 and the sidewall of the mounting groove, but also forms a tight contact with the noise-reducing elastic element 500. This contact ensures a tight seal between the noise-reducing elastic element 500 and the piezoelectric actuator 400, thereby maintaining the noise reduction effect.

[0052] The selection of the sealant 440 is typically based on its properties such as elasticity, corrosion resistance, and abrasion resistance. In this embodiment, the sealant 440 should have sufficient elasticity to accommodate deformation between the cover plate 420 and the sidewall of the mounting groove, while also requiring sufficient corrosion resistance and abrasion resistance to withstand long-term use.

[0053] In some embodiments, such as Figures 1 to 4 As shown, the pressure relief valve core includes a valve seat 340, a valve disc 350, and a valve stem 360. The valve seat 340 is disposed between the inlet chamber 120 and the pressure relief chamber 110; the valve disc 350 is slidably disposed on the valve seat 340; the valve stem 360 passes through the valve disc 350, with its first end extending to the pressure relief chamber 110 and its second end extending to the inlet chamber 120, and a noise-reducing elastic element 500 is pressed between the second end of the valve stem 360 and the drive end of the piezoelectric actuator 400.

[0054] In this embodiment, a valve seat 340 is disposed between the inlet chamber 120 and the pressure relief chamber 110. The valve seat 340 typically has one or more sealing surfaces for cooperating with the valve disc 350 to form a seal. The valve disc 350 is a component slidably disposed on the valve seat 340. When the system pressure rises to a set value, the valve disc 350 is pushed open, allowing fluid to flow from the inlet chamber 120 into the pressure relief chamber 110. The sliding action of the valve disc 350 is typically controlled by the driving force of the pressure relief elastic element 330 (such as a spring) and / or the piezoelectric actuator 400. The valve stem 360 is a component connecting the valve disc 350 and the piezoelectric actuator 400 (or other drive mechanism). It passes through the valve disc 350, with a first end extending into the pressure relief chamber 110 and a second end extending into the inlet chamber 120, and is pressed together with the noise-reducing elastic element 500. The function of valve stem 360 is to transmit the driving force of piezoelectric actuator 400 to valve disc 350, thereby controlling the opening and closing of valve disc 350.

[0055] The noise-reducing elastic element 500 is pressed between the second end of the valve stem 360 and the drive end of the piezoelectric actuator 400. Its main function is to reduce the transient noise generated when the valve disc 350 opens and closes. The noise-reducing elastic element 500 achieves this purpose by absorbing and dispersing impact energy.

[0056] When the system pressure rises to the set value, the preload of the pressure relief elastic element 330 (such as a spring) is insufficient to maintain the closed state of the valve disc 350. Therefore, the valve disc 350 is pushed open, and fluid flows from the inlet chamber 120 into the pressure relief chamber 110. Simultaneously, the piezoelectric actuator 400 generates a driving force based on changes in the electrical signal, which is transmitted to the valve disc 350 via the valve stem 360. The noise-reducing elastic element 500 acts as a buffer during the opening and closing of the valve disc 350, reducing the generation of transient noise.

[0057] In some embodiments, such as Figures 1 to 4As shown, the pressure relief valve with active noise reduction function also includes a throttling sleeve 800. The throttling sleeve 800 is sleeved on the second end of the valve stem 360, and the noise reduction elastic element 500 is pressed between the throttling sleeve 800 and the drive end of the piezoelectric actuator 400.

[0058] Specifically, the throttling sleeve 800 is a component fitted onto the second end of the valve stem 360. By changing the size, shape, or material of the throttling sleeve 800, precise flow control can be achieved. The throttling sleeve 800 is fitted onto the second end of the valve stem 360, located between the noise-reducing elastic element 500 and the drive end of the piezoelectric actuator 400.

[0059] In some embodiments, such as Figures 1 to 4 As shown, the adjusting component includes an adjusting rod 310 and an adjusting end cap 320. The first end of the adjusting rod 310 is located outside the valve body 100, and the second end passes through the first sealing cover 600 and is rotatably mounted on the first sealing cover 600. A pressure-relieving elastic element 330 abuts between the second end of the adjusting rod 310 and the first end of the valve stem 360. The adjusting end cap 320 is connected to the first end of the adjusting rod 310.

[0060] Specifically, the main function of the regulating component is to adjust the working pressure of the pressure relief valve with active silencing function. By changing the position or state of the regulating component, precise control of the opening pressure of the pressure relief valve with active silencing function can be achieved.

[0061] The first end of the adjusting element is located outside the valve body 100, making it convenient for the user to operate or adjust; the second end of the adjusting element passes through the first sealing cover 600 and is rotatably mounted on the first sealing cover 600.

[0062] The second end of the adjusting rod 310 abuts against the pressure relief elastic element 330 (such as a spring). By changing the position of the adjusting rod 310 (such as rotating or moving), the preload of the pressure relief elastic element 330 can be changed, thereby adjusting the working pressure of the pressure relief valve with active silencing function.

[0063] The adjusting end cap 320 is connected to the first end of the adjusting rod 310, and its main function is to fix and protect the adjusting rod 310. At the same time, the adjusting end cap 320 can also serve as a user interface, making it convenient for the user to rotate or move the adjusting rod 310.

[0064] When a user needs to adjust the working pressure of a pressure relief valve with active silencing function, they can rotate or move the adjusting end cover 320 to drive the adjusting rod 310 to rotate or move. The movement of the adjusting rod 310 will change the preload of the pressure relief elastic element 330, thereby changing the opening pressure of the pressure relief valve with active silencing function.

[0065] It is important to note that during the adjustment process, the seal between the adjusting rod 310 and the first sealing cover 600 should be ensured to prevent fluid leakage.

[0066] In some embodiments, such as Figures 1 to 4 As shown, the pressure relief valve with active silencing function also includes: a damping rod 900 and a guide sleeve 1000. The damping rod 900 is connected to the second end of the adjusting rod 310; the first end of the guide sleeve 1000 is movably sleeved on the outside of the damping rod 900, the second end is sleeved on the first end of the valve stem 360, the pressure relief elastic element 330 is sleeved on the outside of the guide sleeve 1000, and the pressure relief elastic element 330 is pressed between the guide sleeve 1000 and the valve disc 350.

[0067] Specifically, the damping rod 900 is connected to the second end of the adjusting rod 310, and its main function is to slow down the movement speed of the adjusting rod 310. When the adjusting rod 310 is subjected to external force, the damping rod 900 can absorb some of the energy, making the movement of the adjusting rod 310 more stable and reducing the impact and vibration caused by rapid movement.

[0068] The guide sleeve 1000 is a sleeve-shaped component with an inner hole. Its first end is movably fitted over the damping rod 900, and its second end is fitted over the first end of the valve stem 360. The main function of the guide sleeve 1000 is to guide the movement of the damping rod 900 and the valve stem 360, ensuring that they can move smoothly along a predetermined trajectory.

[0069] Meanwhile, the guide sleeve 1000 also serves to support and fix the pressure relief elastic element 330 (such as a spring). The pressure relief elastic element 330 is sleeved outside the guide sleeve 1000 and pressed between the guide sleeve 1000 and the valve disc 350. With the support of the guide sleeve 1000, the pressure relief elastic element 330 can more effectively exert its elastic function to achieve the opening and closing control of the valve disc 350.

[0070] The cooperation between the damping rod 900 and the guide sleeve 1000 makes the movement of the adjusting rod 310 smoother, reducing the impact and vibration caused by rapid movement. This design not only improves the reliability and stability of the pressure relief valve with active silencing function, but also extends the service life of the equipment.

[0071] Meanwhile, the cooperation between the damping rod 900 and the guide sleeve 1000 also enables the pressure relief valve with active silencing function to provide the damping coefficient of the spring system, absorb vibration energy, reduce the overshoot of valve core oscillation, and thus reduce the amplitude of pressure pulsation when the valve core opens. By adjusting the damping coefficient of the damping rod 900 and the inner diameter of the guide sleeve 1000, vibration reduction and noise reduction can be passively achieved as needed.

[0072] In this embodiment, as Figures 1 to 4As shown, the pressure relief valve with active silencing function also includes: a pressure sensor, which is disposed in the liquid inlet chamber 120 and / or the pressure relief chamber 110, and the pressure sensor is electrically connected to the piezoelectric actuator 400.

[0073] In addition, the pressure relief valve with active noise reduction function also includes a control unit. The control unit is electrically connected to the pressure sensor and the piezoelectric actuator 400, and is used to receive pressure data collected by the pressure sensor, and control the start and stop of the piezoelectric actuator 400 according to the preset pressure threshold and pressure data, so as to adjust the driving force of the noise reduction elastic element 500 on the pressure relief valve core.

[0074] Specifically, a pressure sensor is installed in the inlet chamber 120 and / or the pressure relief chamber 110, typically only in the pressure relief chamber 110 or downstream pipeline, for real-time monitoring of fluid pressure. It converts pressure signals into electrical signals and transmits them to the control unit for processing. By installing the pressure sensor, accurate monitoring and real-time feedback of fluid pressure can be achieved, providing accurate data support to the control unit.

[0075] The control unit is the core component of the intelligent design of the pressure relief valve with active silencing function. It is electrically connected to the pressure sensor and the piezoelectric actuator 400.

[0076] The main function of the control unit is to receive pressure data collected by the pressure sensor and compare and analyze it with a preset pressure threshold. When the actual pressure exceeds or falls below the preset pressure threshold, the control unit issues a command to control the start and stop of the piezoelectric actuator 400. By controlling the start and stop of the piezoelectric actuator 400, the driving force of the noise-reducing elastic element 500 on the pressure relief valve core can be adjusted. The control algorithm running on the control unit calculates the output signal, which drives the piezoelectric actuator 400 to vibrate the valve disc, eliminating the vibration noise generated by the pulsating pressure in the pipeline.

[0077] By incorporating a pressure sensor and control unit, the pressure relief valve with active silencing function enables real-time monitoring and precise control of fluid pressure. This intelligent design not only improves the reliability and stability of the equipment but also allows the pressure relief valve with active silencing function to be flexibly adjusted according to the needs of different application scenarios.

[0078] In addition, intelligent design reduces the difficulty and complexity of manual operation, and improves the ease of use of the equipment and the user experience.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure relief valve having an active silencing function, characterized by The valve body is provided with a first mounting port and a second mounting port, the first sealing cover is arranged on the first mounting port, and the second sealing cover is arranged on the second mounting port. The valve body is provided with a first mounting port and a second mounting port, the first sealing cover is arranged on the first mounting port, and the second sealing cover is arranged on the second mounting port. The first sealing cover and one side of the pressure relief valve core divide the valve body to form the pressure relief cavity, and the second sealing cover and the other side of the pressure relief valve core divide the valve body to form the liquid inlet cavity. The adjusting member is movably arranged on the first sealing cover, and the piezoelectric actuator is arranged on the second sealing cover. The piezoelectric actuator comprises a fastener, a cover plate and a plurality of piezoelectric bodies. The second sealing cover is provided with a mounting groove, the piezoelectric bodies are arranged in the mounting groove in layers, the fastener penetrates through the plurality of piezoelectric bodies and is fixed on the second sealing cover, the cover plate is arranged on the outermost piezoelectric body, and the outer side of the cover plate abuts against the noise reduction elastic member.

2. The pressure relief valve having an active muffling function according to claim 1, characterized by, The piezoelectric actuator further comprises a sealing filler, and the sealing filler is filled between the outer side of the cover plate and the side wall of the mounting groove. The adjusting member comprises: The adjusting rod is movably arranged on the first sealing cover and abuts against the pressure relief elastic member between the second end of the adjusting rod and the first end of the valve rod. The adjusting end cover is connected to the first end of the adjusting rod.

3. The pressure relief valve having an active muffling function according to claim 2, characterized by, The pressure relief valve with the active noise reduction function further comprises: The damping rod is connected to the second end of the adjusting rod.

4. The pressure relief valve having an active muffling function according to claim 3, characterized by ​ 5. The pressure relief valve having an active muffling function according to claim 2, characterized by, ​ ​ ​ 6. The pressure relief valve having an active muffling function according to claim 5, characterized by ​ ​ A guide sleeve is movably sleeved on the outer side of the damping rod at the first end and sleeved on the first end of the valve rod at the second end. The pressure relief elastic member is sleeved on the outer side of the guide sleeve, and is pressed between the guide sleeve and the valve disc.

7. The pressure relief valve with active sound attenuation function according to any one of claims 1 to 6, characterized in that The pressure relief valve with active noise cancellation function further comprises: A pressure sensor is arranged in the liquid inlet cavity and / or the pressure relief cavity and is electrically connected with the piezoelectric actuator.

8. The pressure relief valve having an active muffling function according to claim 7, characterized by, The pressure relief valve with active noise cancellation function further comprises: A control unit is electrically connected with the pressure sensor and the piezoelectric actuator, receives the pressure data collected by the pressure sensor, and controls the start and stop of the piezoelectric actuator according to the preset pressure threshold and the pressure data, so as to adjust the driving force of the noise reduction elastic member on the pressure relief valve core.

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