Pressure release valve with active noise elimination function

Abstract

The invention provides a pressure release valve with an active silencing function, which comprises a valve body provided with a liquid inlet cavity and a pressure release cavity which are communicated with each other; the bypass pipe is communicated with the liquid inlet cavity; the pressure relief assembly comprises an adjusting part, a pressure relief elastic part and a pressure relief valve element, the pressure relief valve element and the pressure relief elastic part are arranged in the pressure relief cavity, the adjusting part is movably arranged on the valve body, and the pressure relief elastic part is arranged between the adjusting part and the pressure relief valve element in a pressed mode; 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 element in a pressed mode, and the piezoelectric actuator is configured to drive the noise reduction elastic piece. According to the pressure release valve with the active noise elimination function, an active noise elimination technology is introduced into pulsating noise control of the pressure release valve in the mode of arranging the piezoelectric actuator, and the acting force applied to the pressure release valve element can be adjusted through the noise reduction elastic piece so that transient noise caused by pulsating pressure when the pressure release valve element moves can be eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction and noise reduction of pipeline systems, and in particular to a pressure relief valve with an active noise reduction function. Background Art

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

[0003] At present, the research on the elimination of transient noise of pressure relief valves mainly focuses on the optimization design of valve structure and optimization of pipeline layout. These measures can reduce the noise level to a certain extent, but the effect is limited, and often require a lot of calculations and experimental verifications in the early stage of design, which is costly and difficult to directly eliminate the transient noise in the existing valve mechanism. Summary of the invention

[0004] The invention provides a pressure relief valve with an active silencing function, which is used to solve the problem that the existing pressure relief valve with an active silencing function generates strong pulsating pressure and induces transient noise.

[0005] The present invention provides a pressure relief valve with an active silencing function, comprising: The valve body is formed with a liquid inlet cavity and a pressure relief cavity which are interconnected; A bypass pipe, connected to the liquid inlet chamber; A pressure relief assembly, comprising an adjusting member, a pressure relief elastic member and a pressure relief valve core, wherein the pressure relief valve core and the pressure relief elastic member are arranged in the pressure relief chamber, the adjusting member is movably arranged on the valve body, and the pressure relief elastic member is pressed 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, so that the pressure relief valve core is pressed by the pressure relief elastic member to block the liquid inlet chamber and the pressure relief chamber; A piezoelectric actuator and a noise reduction elastic member, wherein the piezoelectric actuator is arranged on the liquid inlet chamber, the noise reduction elastic member is pressed 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 member to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0006] According to a pressure relief valve with active silencing function provided by the present invention, the pressure relief valve with active silencing function further comprises: a first sealing cover and a second sealing cover; The valve body is provided with a first installation opening and a second installation opening, the first sealing cover is arranged at the first installation opening, and the second sealing cover is arranged at the second installation opening; The first sealing cover and one side of the pressure relief valve core separate the valve body to form the pressure relief chamber, and the second sealing cover and the other side of the pressure relief valve core separate the valve body to form the liquid inlet chamber; The adjusting member is movably arranged on the first sealing cover, and the piezoelectric actuator is arranged on the second sealing cover.

[0007] According to a pressure relief valve with active silencing function provided by the present invention, the piezoelectric actuator comprises: a fastener, a cover plate and a plurality of piezoelectric bodies; The second sealing cover is formed with an installation groove, the piezoelectric bodies are stacked in the installation groove, the fastener passes through a plurality of the 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.

[0008] According to a pressure relief valve with active silencer function provided by the present invention, the piezoelectric actuator further comprises: a sealing filler; the sealing filler is filled outside the cover plate and between the cover plate and the side wall of the mounting groove, and the sealing filler abuts against the noise reduction elastic member.

[0009] According to a pressure relief valve with active silencing function provided by the present invention, the pressure relief valve core comprises: A valve seat, arranged between the liquid inlet chamber and the pressure relief chamber; a valve flap slidably disposed on the valve seat; The valve stem is inserted into the valve disc, with a first end extending to the pressure relief chamber and a second end extending to the liquid inlet chamber. The noise reduction elastic member is pressed between the second end of the valve stem and the driving end of the piezoelectric actuator.

[0010] According to a pressure relief valve with active silencing function provided by the present invention, the pressure relief valve with active silencing function further comprises: The throttling sleeve is sleeved on the second end of the valve stem, and the noise reduction elastic member is pressed between the throttling sleeve and the driving end of the piezoelectric actuator.

[0011] According to a pressure relief valve with active silencing function provided by the present invention, the regulating member comprises: An adjusting rod, the first end of which is located outside the valve body, the second end of which passes through the first sealing cover and is rotatably arranged on the first sealing cover, and the pressure relief elastic member abuts between the second end of the adjusting rod and the first end of the valve stem; An adjusting end cap is connected to the first end of the adjusting rod.

[0012] According to a pressure relief valve with active silencing function provided by the present invention, the pressure relief valve with active silencing function further comprises: A damping rod connected to the second end of the adjusting rod; The guide sleeve has a first end that is movably sleeved outside the damping rod and a second end that is sleeved on the first end of the valve stem. The pressure relief elastic member is sleeved outside the guide sleeve and is pressed between the guide sleeve and the valve disc.

[0013] According to a pressure relief valve with active silencing function provided by the present invention, the pressure relief valve with active silencing function further comprises: A pressure sensor is arranged in the liquid inlet chamber and / or the pressure relief chamber and is electrically connected to the piezoelectric actuator.

[0014] According to a pressure relief valve with active silencing function provided by the present invention, the pressure relief valve with active silencing function further comprises: A control unit is electrically connected to the pressure sensor and the piezoelectric actuator, and is used to receive pressure data collected by the pressure sensor, and control the start and stop of the piezoelectric actuator according to a 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.

[0015] The pressure relief valve with active silencing function provided by the present invention aims at the current situation that the traditional passive pulsation noise suppression effect is poor. By arranging a piezoelectric actuator, an active silencing technology with integrated function and structure is introduced into the pulsation noise control of the pressure relief valve with active silencing function. The force applied to the pressure relief valve core can be adjusted through the noise reduction elastic member to eliminate the transient noise caused by the pulsation pressure when the pressure relief valve core moves. In addition, the pressure relief valve with active silencing function can replace the existing pressure relief valve with active silencing function. The adjustment member in the pressure relief assembly allows the user to adjust the preload force of the pressure relief elastic member as needed, and flexibly adjust the working pressure range of the pressure relief valve with active silencing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a pressure relief valve with active silencing function provided by the present invention.

[0018] Figure 2 yes Figure 1Schematic diagram of the AA section.

[0019] Figure 3 yes Figure 2 A magnified schematic diagram of position B in the middle.

[0020] Figure 4 It is a schematic structural diagram of the piezoelectric actuator provided by the present invention.

[0021] Reference numerals: 100, valve body; 110, pressure relief chamber; 120, liquid inlet chamber; 200, bypass pipe; 300, pressure relief assembly; 310, adjusting rod; 320, adjusting end cover; 330, pressure relief elastic member; 340, valve seat; 350, valve disc; 360, valve stem; 400, piezoelectric actuator; 410, fastener; 420, cover plate; 430, piezoelectric body; 440, sealing filler; 500, noise reduction elastic member; 600, first sealing cover; 700, second sealing cover; 800, throttling sleeve; 900, damping rod; 1000, guide sleeve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present invention provides a pressure relief valve with active silencing function, such as Figures 1 to 3 As shown, the pressure relief valve with active silencing function includes: a valve body 100, a bypass pipe 200, a pressure relief assembly 300, a piezoelectric actuator 400 and a noise reduction elastic member 500. The valve body 100 is formed with a liquid inlet chamber 120 and a pressure relief chamber 110 that are interconnected; the bypass pipe 200 is connected to the liquid inlet chamber 120; the pressure relief assembly 300 includes an adjusting member, a pressure relief elastic member 330 and a pressure relief valve core, the pressure relief valve core and the pressure relief elastic member 330 are arranged in the pressure relief chamber 110, the adjusting member is movably arranged on the valve body 100, and the pressure relief elastic member 330 is pressed between the adjusting member and the pressure relief valve core to adjust the pressure through the adjusting member. The pre-tightening force of the pressure relief elastic member 330 causes the pressure relief valve core to be pressed by the pressure relief elastic member 330 to seal the liquid inlet chamber 120 and the pressure relief chamber 110; the piezoelectric actuator 400 is arranged on the liquid inlet chamber 120, and the noise reduction elastic member 500 is pressed between the driving end of the piezoelectric actuator 400 and the pressure relief valve core. The piezoelectric actuator 400 is configured to drive the noise reduction elastic member 500 to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0024] In this embodiment, the valve body 100 is the main structure of the pressure relief valve with active silencing function, and is internally designed with a liquid inlet chamber 120 and a pressure relief chamber 110 that are interconnected. The two chambers are respectively used to receive the fluid pressure from the system and release the fluid whose pressure exceeds the set value. The bypass pipe 200 is connected to the liquid inlet chamber 120, and may be used to guide the fluid to other paths when the pressure is low. The adjusting member can be movably arranged on the valve body 100 to adjust the preload force of the pressure relief elastic member 330. The pressure relief elastic member 330 can be a spring, etc., and is arranged between the adjusting member and the pressure relief valve core. By adjusting the preload force, it is possible to control when the pressure relief valve core is opened or closed, thereby adjusting the working pressure of the pressure relief valve with active silencing function. The pressure relief valve core is used to block or open the channel between the liquid inlet chamber 120 and the pressure relief chamber 110. When the system pressure exceeds the set value, the pressure relief valve core will be pushed open, allowing the fluid to flow from the liquid inlet chamber 120 into the pressure relief chamber 110, thereby releasing the pressure. The piezoelectric actuator 400 is mounted on the liquid inlet chamber 120, and the movement of its driving end is controlled by an electrical signal. In this design, the piezoelectric actuator 400 is used to drive the noise reduction elastic member 500 to reduce the transient noise generated when the pressure relief valve core moves. The noise reduction elastic member 500 is pressed between the driving end of the piezoelectric actuator 400 and the pressure relief valve core. When the pressure relief valve core moves, the noise reduction elastic member 500 can absorb and disperse the vibration and noise generated thereby, thereby reducing the noise level.

[0025] Under normal working conditions, the pressure relief valve core is compressed by the pressure relief elastic member 330, blocking the passage between the liquid inlet chamber 120 and the pressure relief chamber 110. When the system pressure rises to the set value, the preload force of the pressure relief elastic member 330 is insufficient to maintain the closed state of the pressure relief valve core, so the pressure relief valve core is pushed open, and the fluid begins to flow from the liquid inlet chamber 120 into the pressure relief chamber 110, releasing the pressure. The piezoelectric actuator 400 drives and adjusts the noise reduction elastic member 500, which is transmitted to the pressure relief valve core through the noise reduction elastic member 500, driving the pressure relief valve core to generate axial displacement movement, thereby reducing the pulsating noise generated by the valve core oscillation.

[0026] The pressure relief valve with active silencing function provided by the embodiment of the present invention aims at the current situation that the traditional passive pulsation noise suppression effect is poor. By arranging a piezoelectric actuator 400, an active silencing technology with integrated function and structure is introduced into the pulsation noise control of the pressure relief valve with active silencing function. The force applied to the pressure relief valve core can be adjusted through the noise reduction elastic member 500 to eliminate the transient noise caused by the pulsating pressure when the pressure relief valve core moves. In addition, the pressure relief valve with active silencing function can replace the existing pressure relief valve with active silencing function. The adjustment member in the pressure relief assembly 300 allows the user to adjust the preload force of the pressure relief elastic member 330 as needed, and flexibly adjust the working pressure range of the pressure relief valve with active silencing function.

[0027] In some embodiments, Figures 1 to 3As shown, the pressure relief valve with active silencer function also includes: a first sealing cover 600 and a second sealing cover 700; a first mounting port and a second mounting port are provided on the valve body 100, the first sealing cover 600 is arranged at the first mounting port, and the second sealing cover 700 is arranged at 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 member is movably arranged on the first sealing cover 600, and the piezoelectric actuator 400 is arranged on the second sealing cover 700.

[0028] Specifically, the first sealing cover 600 is disposed on the first installation 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 cover 700 is disposed on the second installation 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 cover 600 and the second sealing cover 700 not only play the role of separating the spaces, but also ensure that the fluid does not leak to the outside of the valve body 100.

[0029] In this embodiment, Figure 4 As 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 arranged on the outermost piezoelectric body 430, and the outer side of the cover plate 420 is in contact with the noise reduction elastic member 500.

[0030] Specifically, the fastener 410 is used to fix the piezoelectric actuator 400 on the second sealing cover 700. The fastener 410 is usually one or more bolts, screws or similar fasteners 410, which pass through the stacked piezoelectric bodies 430 and are fixed in corresponding threaded holes on the second sealing cover 700. The cover plate 420 is arranged on the outermost piezoelectric body 430 to protect the piezoelectric body 430 and transmit the driving force. The cover plate 420 is usually made of metal or other rigid materials to ensure that it can withstand the driving force generated by the piezoelectric body 430 and transmit it to the noise reduction elastic member 500. A plurality of piezoelectric bodies 430 are stacked in the mounting groove in the second sealing cover 700. The piezoelectric body 430 is the core component of the piezoelectric actuator 400, and they can generate mechanical deformation (such as elongation or shortening) according to the change of the electrical signal, thereby generating a driving force. In this embodiment, a plurality of piezoelectric bodies 430 are stacked together to increase the driving force and / or improve the response speed.

[0031] When an electrical signal is applied to the piezoelectric body 430, the piezoelectric body 430 will generate mechanical deformation (such as elongation or contraction). Since multiple piezoelectric bodies 430 are stacked together, their deformations are superimposed on each other, thereby generating a greater driving force. The cover plate 420 transmits the driving force generated by the piezoelectric body 430 to the noise reduction elastic member 500. The noise reduction elastic member 500 is then compressed or stretched, thereby acting on the pressure relief valve core to reduce the transient noise generated when the pressure relief valve core moves.

[0032] To ensure the sealing effect, the piezoelectric actuator 400 further includes: a sealing filler 440; the sealing filler 440 is filled outside the cover plate 420 and between the cover plate 420 and the side wall of the mounting groove, and the sealing filler 440 abuts against the noise reduction elastic member 500. The sealing filler 440 ensures the sealing between the cover plate 420 and the side wall of the mounting groove, and prevents leakage of fluid or gas. The sealing filler 440 is not only in close contact with the cover plate 420 and the side wall of the mounting groove, but also in close contact with the noise reduction elastic member 500. This contact ensures the sealing between the noise reduction elastic member 500 and the piezoelectric actuator 400, thereby maintaining the noise reduction effect.

[0033] The selection of the sealing filler 440 is usually based on its elasticity, corrosion resistance, wear resistance, etc. In this embodiment, the sealing filler 440 should have sufficient elasticity to adapt to the deformation between the cover plate 420 and the side wall of the mounting groove, and also need to have sufficient corrosion resistance and wear resistance to withstand long-term use.

[0034] In some embodiments, Figures 1 to 4 As shown, the pressure relief valve core includes: a valve seat 340, a valve flap 350 and a valve stem 360. The valve seat 340 is arranged between the liquid inlet chamber 120 and the pressure relief chamber 110; the valve flap 350 is slidably arranged on the valve seat 340; the valve stem 360 is inserted into the valve flap 350, with a first end extending to the pressure relief chamber 110 and a second end extending to the liquid inlet chamber 120, and the noise reduction elastic member 500 is pressed between the second end of the valve stem 360 and the driving end of the piezoelectric actuator 400.

[0035] In this embodiment, the valve seat 340 is arranged between the liquid inlet chamber 120 and the pressure relief chamber 110. The valve seat 340 usually has one or more sealing surfaces for cooperating with the valve flap 350 to form a seal. The valve flap 350 is a component slidably arranged on the valve seat 340. When the system pressure rises to a set value, the valve flap 350 will be pushed open, allowing the fluid to flow from the liquid inlet chamber 120 into the pressure relief chamber 110. The sliding action of the valve flap 350 is usually controlled by the driving force of the pressure relief elastic member 330 (such as a spring) and / or the piezoelectric actuator 400. The valve stem 360 is a component connecting the valve flap 350 and the piezoelectric actuator 400 (or other driving mechanism). It is inserted into the valve flap 350, with the first end extending to the pressure relief chamber 110 and the second end extending to the liquid inlet chamber 120, and is pressed together with the noise reduction elastic member 500. The valve stem 360 is used to transmit the driving force of the piezoelectric actuator 400 to the valve flap 350 , thereby controlling the opening and closing of the valve flap 350 .

[0036] The noise reduction elastic member 500 is pressed between the second end of the valve stem 360 and the driving end of the piezoelectric actuator 400. Its main function is to reduce the transient noise generated when the valve flap 350 is opened and closed. The noise reduction elastic member 500 can achieve this purpose by absorbing and dispersing impact energy.

[0037] When the system pressure rises to the set value, the preload force of the pressure relief elastic member 330 (such as a spring) is insufficient to maintain the closed state of the valve flap 350, so the valve flap 350 is pushed open, and the fluid flows from the liquid inlet chamber 120 into the pressure relief chamber 110. At the same time, the piezoelectric actuator 400 generates a driving force according to the change of the electrical signal, and transmits the driving force to the valve flap 350 through the valve stem 360. The noise reduction elastic member 500 plays a buffering role when the valve flap 350 is opened and closed, reducing the generation of transient noise.

[0038] In some embodiments, Figures 1 to 4 As shown, the pressure relief valve with active noise reduction function further includes a throttle sleeve 800 . The throttle sleeve 800 is sleeved on the second end of the valve stem 360 , and the noise reduction elastic member 500 is pressed between the throttle sleeve 800 and the driving end of the piezoelectric actuator 400 .

[0039] Specifically, the throttle sleeve 800 is a component sleeved on the second end of the valve stem 360. By changing the size, shape or material of the throttle sleeve 800, accurate control of the flow rate can be achieved. The throttle sleeve 800 is sleeved on the second end of the valve stem 360 and is located between the noise reduction elastic member 500 and the driving end of the piezoelectric actuator 400.

[0040] In some embodiments, Figures 1 to 4As shown, the adjusting member includes: an adjusting rod 310 and an adjusting end cover 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 arranged on the first sealing cover 600. The pressure relief elastic member 330 abuts between the second end of the adjusting rod 310 and the first end of the valve stem 360. The adjusting end cover 320 is connected to the first end of the adjusting rod 310.

[0041] Specifically, the main function of the regulating member is to adjust the working pressure of the pressure relief valve with active silencing function. By changing the position or state of the regulating member, the opening pressure of the pressure relief valve with active silencing function can be accurately controlled.

[0042] The first end of the adjusting member is located outside the valve body 100 , which is convenient for the user to operate or adjust; the second end of the adjusting member passes through the first sealing cover 600 and is rotatably disposed on the first sealing cover 600 .

[0043] The second end of the adjustment rod 310 abuts against the pressure relief elastic member 330 (such as a spring). By changing the position of the adjustment rod 310 (such as rotating or moving), the preload force of the pressure relief elastic member 330 can be changed, thereby adjusting the working pressure of the pressure relief valve with active silencer function.

[0044] The adjustment end cap 320 is connected to the first end of the adjustment rod 310, and mainly plays the role of fixing and protecting the adjustment rod 310. At the same time, the adjustment end cap 320 can also be used as an interface for user operation, so that the user can rotate or move the adjustment rod 310.

[0045] When the user needs to adjust the working pressure of the pressure relief valve with active silencer function, the user can rotate or move the adjustment end cap 320 to drive the adjustment rod 310 to rotate or move. The movement of the adjustment rod 310 will change the preload force of the pressure relief elastic member 330, thereby changing the opening pressure of the pressure relief valve with active silencer function.

[0046] It should be noted that during the adjustment process, the sealing between the adjustment rod 310 and the first sealing cover 600 should be ensured to prevent fluid leakage.

[0047] In some embodiments, Figures 1 to 4 As shown, the pressure relief valve with active muffler function further includes: a damping rod 900 and a guide sleeve 1000. The damping rod 900 is connected to the second end of the adjustment rod 310; the first end of the guide sleeve 1000 is movably sleeved outside the damping rod 900, and the second end is sleeved on the first end of the valve stem 360; the pressure relief elastic member 330 is sleeved outside the guide sleeve 1000, and the pressure relief elastic member 330 is pressed between the guide sleeve 1000 and the valve disc 350.

[0048] Specifically, the damping rod 900 is connected to the second end of the adjusting rod 310, and mainly plays the role of slowing 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 part of the energy, making the movement of the adjusting rod 310 more stable and reducing the impact and vibration caused by rapid movement.

[0049] The guide sleeve 1000 is a sleeve-shaped component with an inner hole, and its first end is movably sleeved outside the damping rod 900, and its second end is sleeved on 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 to ensure that they can move smoothly along a predetermined trajectory.

[0050] At the same time, the guide sleeve 1000 also plays a role in supporting and fixing the pressure relief elastic member 330 (such as a spring). The pressure relief elastic member 330 is sleeved outside the guide sleeve 1000 and pressed between the guide sleeve 1000 and the valve flap 350. With the support of the guide sleeve 1000, the pressure relief elastic member 330 can more effectively exert its elastic effect to achieve the opening and closing control of the valve flap 350.

[0051] The cooperation of the damping rod 900 and the guide sleeve 1000 makes the movement of the adjustment rod 310 more stable, 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 prolongs the service life of the equipment.

[0052] At the same time, the combination of the damping rod 900 and the guide sleeve 1000 also enables the pressure relief valve with active noise reduction function to provide a damping coefficient for the spring system, absorb vibration energy, reduce the overshoot of the valve core oscillation, and thus reduce the pressure pulsation amplitude caused by the valve core opening. By adjusting the damping coefficient of the damping rod 900 and the inner hole size of the guide sleeve 1000, the vibration reduction and noise reduction can be passively reduced according to the needs.

[0053] In this embodiment, Figures 1 to 4 As shown, the pressure relief valve with active noise reduction function further includes: a pressure sensor, which is arranged 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 .

[0054] 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 member 500 on the pressure relief valve core.

[0055] Specifically, the pressure sensor is arranged in the liquid inlet chamber 120 and / or the pressure relief chamber 110, and is generally arranged only in the pressure relief chamber 110 or in the downstream pipeline, for real-time monitoring of the fluid pressure. It can convert the pressure signal into an electrical signal and transmit it to the control unit for processing. By setting up the pressure sensor, accurate monitoring and real-time feedback of the fluid pressure can be achieved, providing accurate data support for the control unit.

[0056] The control unit is a core component of the intelligent design of the pressure relief valve with active silencing function, and is electrically connected to the pressure sensor and the piezoelectric actuator 400 .

[0057] The main function of the control unit is to receive the pressure data collected by the pressure sensor and compare and analyze the pressure data according to the preset pressure threshold. When the actual pressure exceeds or falls below the preset pressure threshold, the control unit will issue 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 reduction elastic member 500 on the pressure relief valve core can be adjusted. The control algorithm running on the control unit calculates the output signal, drives the piezoelectric actuator 400 to push the valve disc to vibrate, and eliminates the vibration noise generated by the pulsating pressure of the pipeline.

[0058] After the introduction of pressure sensors and control units, the pressure relief valve with active silencing function has achieved real-time monitoring and precise control of fluid pressure. This intelligent design not only improves the reliability and stability of the equipment, but also enables the pressure relief valve with active silencing function to be flexibly adjusted according to the needs of different application scenarios.

[0059] In addition, the intelligent design reduces the difficulty and complexity of manual operation and improves the usability and user experience of the equipment.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure relief valve with active silencing function, characterized in that: include: The valve body is formed with a liquid inlet cavity and a pressure relief cavity which are interconnected; A bypass pipe, connected to the liquid inlet chamber; A pressure relief assembly, comprising an adjusting member, a pressure relief elastic member and a pressure relief valve core, wherein the pressure relief valve core and the pressure relief elastic member are arranged in the pressure relief chamber, the adjusting member is movably arranged on the valve body, and the pressure relief elastic member is pressed 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, so that the pressure relief valve core is pressed by the pressure relief elastic member to block the liquid inlet chamber and the pressure relief chamber; A piezoelectric actuator and a noise reduction elastic member, wherein the piezoelectric actuator is arranged on the liquid inlet chamber, the noise reduction elastic member is pressed 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 member to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

2. The pressure relief valve with active silencing function according to claim 1, characterized in that: The pressure relief valve with active noise reduction function further includes: a first sealing cover and a second sealing cover; The valve body is provided with a first installation opening and a second installation opening, the first sealing cover is arranged at the first installation opening, and the second sealing cover is arranged at the second installation opening; The first sealing cover and one side of the pressure relief valve core separate the valve body to form the pressure relief chamber, and the second sealing cover and the other side of the pressure relief valve core separate the valve body to form the liquid inlet chamber; The adjusting member is movably arranged on the first sealing cover, and the piezoelectric actuator is arranged on the second sealing cover.

3. The pressure relief valve with active silencing function according to claim 2, characterized in that: The piezoelectric actuator comprises: a fastener, a cover plate and a plurality of piezoelectric bodies; The second sealing cover is formed with an installation groove, the piezoelectric bodies are stacked in the installation groove, the fastener passes through a plurality of the 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.

4. The pressure relief valve with active silencing function according to claim 3, characterized in that: The piezoelectric actuator further includes: a sealing filler; the sealing filler is filled outside the cover plate and between the cover plate and the side wall of the mounting groove, and the sealing filler abuts against the noise reduction elastic member.

5. The pressure relief valve with active silencing function according to claim 2, characterized in that: The pressure relief valve core comprises: A valve seat, arranged between the liquid inlet chamber and the pressure relief chamber; a valve flap slidably disposed on the valve seat; The valve stem is inserted into the valve disc, with a first end extending to the pressure relief chamber and a second end extending to the liquid inlet chamber. The noise reduction elastic member is pressed between the second end of the valve stem and the driving end of the piezoelectric actuator.

6. The pressure relief valve with active silencing function according to claim 5, characterized in that: The pressure relief valve with active silencing function also includes: The throttling sleeve is sleeved on the second end of the valve stem, and the noise reduction elastic member is pressed between the throttling sleeve and the driving end of the piezoelectric actuator.

7. The pressure relief valve with active silencing function according to claim 5, characterized in that: The adjusting member comprises: An adjusting rod, the first end of which is located outside the valve body, the second end of which passes through the first sealing cover and is rotatably arranged on the first sealing cover, and the pressure relief elastic member abuts between the second end of the adjusting rod and the first end of the valve stem; An adjusting end cap is connected to the first end of the adjusting rod.

8. The pressure relief valve with active silencing function according to claim 7, characterized in that: The pressure relief valve with active silencing function also includes: A damping rod connected to the second end of the adjusting rod; The guide sleeve has a first end that is movably sleeved outside the damping rod and a second end that is sleeved on the first end of the valve stem. The pressure relief elastic member is sleeved outside the guide sleeve and is pressed between the guide sleeve and the valve disc.

9. The pressure relief valve with active silencing function according to any one of claims 1 to 8, characterized in that: The pressure relief valve with active silencing function also includes: A pressure sensor is arranged in the liquid inlet chamber and / or the pressure relief chamber and is electrically connected to the piezoelectric actuator.

10. The pressure relief valve with active silencing function according to claim 9, characterized in that: The pressure relief valve with active silencing function also includes: A control unit is electrically connected to the pressure sensor and the piezoelectric actuator, and is used to receive pressure data collected by the pressure sensor, and control the start and stop of the piezoelectric actuator according to a 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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