Fluid valve and fluid supply system

Abstract

The invention discloses a fluid valve. The fluid valve comprises a valve body; an elastic device; the valve element is arranged on the valve body in a sliding mode in the fluid flowing direction, an elastic device is arranged between the valve element and the valve body, a pressed face is formed on the liquid inlet side of the valve element, and the stress of the pressed face is opposite to the acting force of the elastic device on the valve element. When the valve element slides relative to the valve body in the direction in which a valve port formed between the valve element and the valve body becomes smaller, the elastic deformation amount of the elastic device is increased. And the sound monitoring device is used for identifying vibration sound generated by the valve core in a preset flow range. When the flow reaches the preset flow, the valve element and the elastic device form simple harmonic vibration, when the flow reaches the preset flow, the valve element can generate corresponding vibration sound, meanwhile, the vibration sound is monitored by the sound monitoring device, the flow monitoring effect is achieved, and therefore the fluid valve can effectively solve the problem that an existing fluid valve is poor in flow monitoring effect. The invention further discloses a fluid supply system comprising the fluid valve.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid systems, and more specifically, to a fluid valve, and also to a fluid supply system comprising the fluid valve. Background Art

[0002] In industrial practices spanning many fields such as aerospace, electronic information technology, transportation equipment manufacturing, new energy applications, rail transit air-conditioning systems, central temperature control facilities, energy storage temperature control solutions, liquid cooling and electronic heat dissipation, cabinet air-conditioning devices, data center integrated services, cold chain temperature control technology and indoor air quality control, hydraulic valves play a vital role as key components. Their core function is to accurately control the flow and pressure of the fluid, thereby achieving fine management of temperature to meet the specific needs of various industries.

[0003] Flow measurement is considered a core element to ensure stable operation and optimized performance of hydraulic systems and liquid transmission. Traditionally, technologies such as orifice, vortex, turbine, electromagnetic, rotor, ultrasonic and oval gear flowmeters can provide basic measurement accuracy, but each is limited by specific conditions. For example, some flowmeters require the fluid to have specific properties, such as conductivity and purity; others may weaken the fluid transmission efficiency due to significant pressure drop during the measurement process. In addition, these devices are often complex and expensive. When faced with corrosive, conductive or high-viscosity fluids, the scope of application of existing flow meters is limited, which may lead to measurement inaccuracies or hardware damage.

[0004] In the process of realizing the invention, the inventors found that there are at least the following problems in the prior art: the current fluid valve flow monitoring effect is not good. Summary of the invention

[0005] In view of this, the first object of the present invention is to provide a fluid valve, which can effectively solve the problem of poor flow monitoring effect of current fluid valves. The second object of the present invention is to provide a fluid supply system including the above-mentioned fluid valve.

[0006] In order to achieve the above first object, the present invention provides the following technical solutions:

[0007] A fluid valve, comprising:

[0008] Valve body;

[0009] Elastic device;

[0010] A valve core is slidably disposed on the valve body along the direction of fluid flow, an elastic device is disposed between the valve core and the valve body, a pressure surface is formed on the liquid inlet side of the valve core, and the force on the pressure surface is opposite to the force of the elastic device on the valve core, and when the valve core slides relative to the valve body in a direction to reduce the valve opening formed between them, the elastic deformation of the elastic device increases;

[0011] The sound monitoring device is used to identify the vibration sound generated by the valve core within a predetermined flow range.

[0012] When in use, first select a fluid valve that meets the preset vibration requirements, such as the valve core quality and the elastic coefficient of the elastic device, according to the monitored flow range, so that when the fluid reaches the preset flow range, a corresponding vibration sound is generated. Then the sound monitoring device monitors the valve core of the fluid valve, mainly monitoring whether there is a corresponding vibration sound at the valve core. If the flow reaches the preset flow, the sound monitoring device can monitor the corresponding vibration sound at this time, which is convenient for further judgment of whether the flow reaches the preset flow. In the above-mentioned fluid valve, the valve core is impacted by the fluid and the impact direction is opposite to the action direction of the elastic device, so that a simple harmonic vibration is formed. When the flow reaches the preset flow, the designed vibration frequency and / or vibration amplitude is formed, and the valve core will generate a corresponding vibration sound. At the same time, the vibration sound is detected by the sound monitoring device to monitor whether the inlet side of the fluid valve reaches the preset flow. The flow monitoring effect is achieved, and the structure is simple. In summary, the above-mentioned fluid valve can effectively solve the problem of poor flow monitoring effect of the current fluid valve.

[0013] In some technical solutions, a controller is also included, which is connected to the sound monitoring device to obtain the vibration sound signal obtained by the sound monitoring device. The controller can obtain the sound pressure and / or frequency according to the vibration sound signal, and can obtain the flow rate according to the sound pressure and / or the frequency.

[0014] In some technical solutions, the valve body is provided with a first limiting structure to prevent the valve core from continuing to move when the valve core moves to the valve opening to a preset maximum opening and abuts against the valve core, and the elastic device is in an elastically deformed state.

[0015] In some technical solutions, the valve body is provided with a second limiting structure to prevent the valve core from continuing to move when the valve core moves to the valve port opening to a preset minimum opening and abuts against the valve core.

[0016] In some technical solutions, the pressure surface is stepped.

[0017] In some technical schemes, the valve body includes a circulation cavity and a valve flap located at the center of the circulation cavity, the valve core is slidably installed in the circulation cavity, a through valve hole is formed in the middle of the valve core, and when the valve core moves to the point where the valve port is located at the preset minimum opening, the valve flap extends into the valve hole; when the valve core moves to the point where the valve port is located at the preset maximum opening, the valve flap disengages from the valve hole.

[0018] In some technical solutions, an arc convex surface is formed at one end of the valve disc facing the fluid; and an arc chamfered structure is formed at one end of the valve hole facing the fluid.

[0019] In some technical solutions, the valve core includes a limiting protrusion, and the first limiting structure and the second limiting structure are both limiting shoulders, which are used to limit the limiting protrusion in opposite directions respectively.

[0020] In some technical solutions, the valve core has an inner shoulder surface facing opposite to the pressure surface, the elastic device is a compression elastic device, and one end penetrates into the valve core to abut against the inner shoulder surface, and the other end abuts against the valve body.

[0021] In some technical schemes, the valve core is cylindrical, and the inner wall has an annular inner protrusion, and the valve hole is formed by the annular inner protrusion; along the fluid flow direction, the rear end of the annular inner protrusion is staggered with the rear end face of the valve core and together constitute the pressure surface, and the front end of the annular inner protrusion is staggered with the front end face of the valve core to form the inner shoulder surface; the annular limiting protrusion is formed on the outer wall of the valve core.

[0022] In order to achieve the above second object, the present invention further provides a fluid supply system, which includes any of the above fluid valves, including a filter, a pressure vessel, a drive pump, a heat exchange device and a heater arranged in sequence along the fluid flow direction, and the fluid valve is arranged on the inlet side of the filter. Since the above fluid valve has the above technical effects, the fluid supply system having the fluid valve should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only 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.

[0024] Figure 1 A schematic diagram of the side structure of a fluid valve provided in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the intermediate fluid valve along the AA direction when the valve core is located at the first position;

[0026] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the middle fluid valve along the AA direction when the valve core is located at the second position;

[0027] Figure 4 A schematic diagram of the cross-sectional structure of a valve body provided in an embodiment of the present invention;

[0028] Figure 5 A three-dimensional schematic diagram of a valve body provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the cross-sectional structure of a valve core provided in an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the rear side of a valve core provided in an embodiment of the present invention;

[0031] Figure 8 A three-dimensional schematic diagram of a fluid valve provided by an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of the connection of a fluid supply system provided in an embodiment of the present invention.

[0033] The following are marked in the accompanying drawings:

[0034] Fluid valve 100, filter 200, pressure vessel 300, drive pump 400, heat exchange device 500, heater 600, compressor 700, condenser 800;

[0035] Valve body 1, elastic device 2, valve core 3, sound monitoring device 4, valve port 5;

[0036] Valve body 11, annular end cover 12, valve disc 13, connecting rod portion 14, inner convex structure 15, cross rod portion 16, flow cavity 17, first matching hole 111, second matching hole 112, third matching hole 113, second limiting structure 114, first limiting structure 121, arc convex surface 131;

[0037] The pressure-bearing surface 31 , the first hole section 32 , the second hole section 33 , the limiting protrusion 34 , the inner shoulder surface 35 , the annular inner protrusion 36 , the outer cylinder wall 37 , the valve hole 361 , and the circular chamfer structure 362 . DETAILED DESCRIPTION

[0038] The embodiment of the present invention discloses a fluid valve to effectively solve the problem that the flow rate monitoring effect of the current fluid valve is poor.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0040] See also Figure 1-Figure 9 , Figure 1 A schematic diagram of the side structure of a fluid valve provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the intermediate fluid valve along the AA direction when the valve core is located at the first position; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the middle fluid valve along the AA direction when the valve core is located at the second position; Figure 4 A schematic diagram of the cross-sectional structure of a valve body provided in an embodiment of the present invention; Figure 5 A three-dimensional schematic diagram of a valve body provided in an embodiment of the present invention; Figure 6 A schematic diagram of the cross-sectional structure of a valve core provided in an embodiment of the present invention; Figure 7 A schematic diagram of the rear side of a valve core provided in an embodiment of the present invention; Figure 8 A three-dimensional schematic diagram of a fluid valve provided by an embodiment of the present invention; Fig. 9 A schematic diagram of the connection of a fluid supply system provided in an embodiment of the present invention.

[0041] In some embodiments, a fluid valve 100 is provided, which may be a hydraulic valve or a fluid valve 100. Specifically, the fluid valve includes a valve body 1, an elastic device 2, a valve core 3, and a sound monitoring device 4. It should be noted that, in order to better illustrate the structural relationship of the present application, the fluid flow direction is the forward direction, and the opposite direction is the backward direction. When the fluid flows in a curved manner, the direction of the fluid flow path is the forward direction.

[0042] The valve core 3 is slidably arranged on the valve body 1 along the direction of fluid flow, and a valve port 5 is formed between the valve core 3 and the valve body 1, so that the valve core 3 slides relative to the valve body 1 along the direction of fluid flow to adjust the size of the valve port 5. The size of the valve port 5 is generally measured by the opening. In the fluid valve, when the valve core 3 slides relative to the valve body 1 to the first position along the direction of fluid flow, the valve port 5 is in an open state, and the opening is generally at its maximum; when the valve core 3 slides relative to the valve body 1 to the second position along the direction of fluid flow, the valve port 5 is in a minimum state, and the opening is generally at its minimum, so it can be regarded as a closed state (not completely closed), but fluid can still pass through. The movement of the valve core 3 from the first position to the second position is generally along the direction of fluid flow, and the movement of the valve core 3 from the second position to the first position is generally against the direction of fluid flow. Generally, when the valve core 3 slides relative to the valve body 1 along the direction of fluid flow to reduce the valve port 5, the valve core 3 slides along the direction of fluid flow.

[0043] An elastic device 2 is provided between the valve core 3 and the valve body 1, and when the valve core 3 slides relative to the valve body 1 in a direction to reduce the valve port 5 formed therebetween, the elastic deformation of the elastic device 2 increases. That is, when the valve core 3 slides relative to the valve body 1 along the fluid flow direction to reduce the valve port 5, the elastic device 2 blocks the movement of the valve core 3 in this direction, that is, when the valve core 3 moves in the direction of reducing the valve port 5, the elastic device 2 gradually accumulates energy. The elastic device 2 can be a compression elastic device, in which case the elastic device 2 is gradually compressed and produces compression deformation when the valve core 3 moves in the direction of reducing the valve port 5; the elastic device 2 can also be a tension elastic device, in which case the elastic device 2 is gradually stretched and produces tension deformation when the valve core 3 moves in the direction of reducing the valve port 5.

[0044] The liquid inlet side of the valve core 3 forms a pressure surface 31, wherein the liquid inlet side, i.e., the liquid-facing side, faces in the opposite direction to the fluid flow direction, so that the fluid will impact the pressure surface 31 and bear the pressure. The force on the pressure surface 31 is opposite to the force of the elastic device 2 on the valve core 3. The pressure surface 31 is subjected to force, i.e., the pressure surface 31 is subjected to the impact force of the fluid flow, and the force direction is consistent with the fluid flow direction, while the force of the elastic device 2 on the valve core 3 is against the fluid flow direction, i.e., preventing the valve core 3 from sliding along the fluid flow direction.

[0045] This makes it possible that when the fluid exerts a relatively large impact on the pressure surface 31, the valve core 3 is driven to move, so that the elastic device 2 is elastically deformed, and the valve core 3 and the elastic device 2 will form a simple harmonic vibration. After research, it was found that under a certain vibration frequency, a relatively obvious vibration sound will occur at the valve core 3. There may be at least two situations in which the vibration sound is generated: one is that when the vibration frequency of the simple harmonic vibration is consistent with the natural frequency of the valve core 3, a sound will be formed at this time; the other is that when the vibration frequency of the simple harmonic vibration reaches a certain range, the friction sound between the valve core 3 and the valve body 1 will increase to a state that can be recognized or the sound generated by the force between the valve core 3 and the fluid will increase to a state that can be recognized. That is, this vibration sound will change with the change of the fluid flow rate, such as the change of amplitude and / or frequency, and the frequency change is generally used as the identification object. Under the preset flow rate, when the vibration frequency and / or vibration amplitude reach the design value, it can be achieved by correspondingly adjusting the mass of the valve core 3 and the elastic coefficient of the elastic device 2. Therefore, the mass of the valve core 3 and / or the elastic coefficient of the elastic device 2 can be changed so that when the flow rate is preset, the amplitude and / or frequency of the simple harmonic oscillation can reach the preset value, so that it can be recognized by the sound monitoring device or the human ear. When monitoring whether the fluid reaches the preset flow rate, when the fluid reaches the preset flow rate, a corresponding sound will be generated, and the corresponding sound can be recognized. Therefore, when the corresponding sound is recognized, it means that the fluid has reached the preset flow rate. It should be noted that the vibration sound is generated at the valve core 3, but it is not necessarily emitted by the valve core 3. It may also be the fluid at the valve core 3, or the corresponding part of the valve body 1 at the valve core 3.

[0046] In some embodiments, a sound monitoring device 4 may be further provided to identify the vibration sound generated by the valve core 3 within a predetermined flow range, that is, when the flow at the valve core 3 reaches a preset flow, a corresponding vibration sound is generated, and this vibration sound can be monitored by the sound monitoring device, so that when the sound monitoring device monitors the corresponding vibration sound, it indicates that the flow at the valve core 3 reaches the preset flow, so as to complete the monitoring. The sound monitoring device 4 may specifically be a sound sensor.

[0047] In some embodiments, when in use, first select a fluid valve that meets the preset vibration requirements such as the quality of the valve core 3 and the elastic coefficient of the elastic device 2 according to the monitored flow range, so that when the fluid reaches the preset flow range, a corresponding vibration sound is generated. Then the sound monitoring device monitors the valve core 3 of the fluid valve, mainly monitoring whether there is a corresponding vibration sound at the valve core 3. If the flow reaches the preset flow, the sound monitoring device can monitor the corresponding vibration sound at this time, which is convenient for further judgment of whether the flow reaches the preset flow. In the above-mentioned fluid valve, the valve core 3 is impacted by the fluid and the impact direction is opposite to the action direction of the elastic device 2, so that a simple harmonic vibration is formed. When the flow reaches the preset flow, the designed vibration frequency and / or vibration amplitude are formed, and the valve core 3 will generate a corresponding vibration sound. At the same time, the vibration sound is detected by the sound monitoring device to monitor whether the inlet side of the fluid valve reaches the preset flow. So that the flow monitoring effect is achieved, and the structure is simple. In summary, the above-mentioned fluid valve can effectively solve the problem of poor flow monitoring effect of the current fluid valve.

[0048] In some embodiments, a controller is also included, wherein the controller is connected to the sound monitoring device 4 to obtain the vibration sound signal obtained by the sound monitoring device 4, and the controller can obtain the sound pressure and / or frequency according to the vibration sound signal, and can obtain the flow rate according to the sound pressure and / or frequency.

[0049] In some embodiments, the specific steps of the entire signal processing are as follows: a sound signal collection step, using the sound monitoring device 4 to collect the sound source signal; a signal preprocessing step, the controller filters, reduces noise and other processing on the collected sound signal to reduce environmental interference. Fourier transform step, the controller performs Fourier transform on the preprocessed sound signal to obtain a spectrum; a spectrum analysis step, the controller extracts the sound pressure and frequency information from the spectrum; a flow calculation step: the controller calculates the real-time flow based on the sound pressure and frequency. Of course, other methods can also be used to process the detected sound signal to obtain the final result. Through the above steps, real-time monitoring of the fluid flow can be achieved to ensure safe and stable operation of the system.

[0050] In some embodiments, the valve body 1 is provided with a first limiting structure 121, so that when the valve core 3 moves to the valve port 5 and opens to the preset maximum opening, it abuts against the valve core 3 to prevent the valve core 3 from continuing to move in the opposite direction of the fluid flow direction, and the elastic device 2 is in an elastic deformation state. When the elastic device 2 pushes the valve core 3 to slide in the direction of the fluid flow, that is, to slide in the direction of the increase of the valve port 5, when it moves to the above-mentioned first position or exceeds the first position, the valve core 3 is limited by the first limiting structure 121 and cannot continue to move, so as to maintain the current position state. At this time, the elastic device 2 can reach the natural expansion state or not reach the natural expansion state. The former can better realize simple harmonic vibration, and the latter can realize pre-tightening to prevent the valve core 3 from sliding at will.

[0051] In some embodiments, the valve body 1 is provided with a second limiting structure 114, so as to prevent the valve core 3 from continuing to move when the valve core 3 moves to the preset minimum opening of the valve port 5 and abuts against the valve core 3. At this time, it is preferred that the elastic device 2 does not reach the maximum deformation amount, and the second limiting structure 114 can prevent the elastic device 2 from reaching the maximum deformation amount, thereby better protecting the elastic device 2.

[0052] It should be noted that, for the first limiting structure 121 and the second limiting structure 114, a limiting shoulder or a limiting protrusion 34 may be used, and the specific limiting method may be set accordingly as needed.

[0053] In some embodiments, the pressure surface 31 can be stepped, that is, the pressure surface 31 is not located on the same cross-section, but the pressure surfaces 31 are staggered in the direction of fluid flow, so as to be staggered in the direction of fluid flow, so that the radial component of the pressure surface 31 can be dispersed, so as to offset each other and make the valve core 3 slide more smoothly.

[0054] In some embodiments, the valve body 1 may include a circulation chamber 17 and a valve flap 13 located at the center of the circulation chamber 17, wherein the valve core 3 is slidably mounted in the circulation chamber 17, so that it can slide relative to the valve body 1 in the direction of fluid flow. A through valve hole 361 is formed in the middle of the valve core 3, and when the valve core 3 moves to the valve port 5 at the preset minimum opening, the valve flap 13 extends into the valve hole 361, and a small gap is formed between the two. When the valve core 3 moves to the valve port 5 at the preset maximum opening, the valve flap 13 disengages from the valve hole 361, and the relative position of the valve flap 13 relative to the valve hole 361 in the direction of fluid flow is adjusted, so that the valve port 5 changes. This change method is relatively simple and easy to operate. Of course, it can also be set in the opposite direction. In this case, the valve body 1 is provided with the valve hole 361, and the valve flap 13 is integrated in the valve core 3 device.

[0055] In some embodiments, an arc convex surface 131 is formed at one end of the valve flap 13 facing the fluid, that is, an arc convex surface 131 is formed at the liquid inlet side of the valve flap 13 to face the fluid, so as to facilitate the drainage of the fluid.

[0056] In some embodiments, a circular chamfer structure 362 can be formed on the edge of the valve hole 361 facing the fluid inlet, that is, on the liquid inlet side of the valve hole 361, the edge of the hole forms a circular chamfer structure 362 to guide the fluid to flow into the hole.

[0057] In some embodiments, the fluid outlet end hole of the valve hole 361 may also be formed into a trumpet-shaped structure, that is, a gradually expanding setting is achieved along the fluid flow direction to match the arc convex surface 131 .

[0058] In some embodiments, the valve core 3 may include a limiting protrusion 34, and the first limiting structure 121 and the second limiting structure 114 are both limiting shoulders, which are used to limit the limiting protrusion 34 in opposite directions, so that the limiting is convenient and simple.

[0059] In some embodiments, the valve core 3 can have an inner shoulder surface 35 facing opposite to the pressure surface 31, and the elastic device 2 is a compression elastic device 2, and one end of the elastic device 2 is inserted into the valve core 3 to abut against the inner shoulder surface 35, and the other end is abutted against the valve body 1, so as to extend into the valve core 3 through the elastic device 2, which can better extend the elastic device 2 so that the elastic device 2 has a larger deformation range, and at the same time can better reduce the size of the valve body 1 in the fluid flow direction.

[0060] In some embodiments, further, the valve core 3 can be made cylindrical, and the inner wall has an annular inner protrusion 36, and the valve hole 361 formed by the annular inner protrusion 36 is generally located in the middle. Along the fluid flow direction, the rear end of the annular inner protrusion 36 is staggered with the rear end face of the valve core 3 and together constitutes the pressure surface 31, that is, the rear end of the annular inner protrusion 36 is on the front side of the rear end face of the valve core 3. The front end of the annular inner protrusion 36 is staggered with the front end face of the valve core 3 to form an inner shoulder surface 35, that is, the front end of the annular inner protrusion 36 is on the rear side of the front end face of the valve core 3. That is, inside the valve core 3 along the fluid flow direction, the first hole section 32, the valve hole 361 and the second hole end are formed, and the elastic device 2 is inserted into the second hole section 33 to abut against the inner end face. The rear end of the annular inner protrusion 36 is staggered with the rear end face of the valve core 3, that is, a stepped structure is formed, and because of the staggered setting, the first hole section 32 is formed. Generally speaking, the inner diameters of the first hole section 32 and the second hole section 33 are both larger than the inner diameter of the valve hole 361. Generally speaking, the inner diameter of the first hole section 32 is smaller than the second hole section 33, so that the opening of the valve port 5 can reach the maximum.

[0061] An annular limiting protrusion 34 is formed on the outer wall of the valve core 3. The limiting protrusion 34 is preferably outside the inlet end of the valve core 3, that is, the outer diameter of the limiting protrusion 34 is larger than the outer diameter of the outer wall of the valve core 3. Generally speaking, the span of the limiting protrusion 34 in the flow direction is relatively small, even smaller than the span of the first hole section 32. It should be noted that although some parts use "outer diameter" and "inner diameter", they mainly indicate the transverse size, which does not mean that it must be a circular structure, but can also be other structures. Generally speaking, the corresponding positions can all adopt a circular structure.

[0062] The valve body 1 includes a valve body 11 and an annular end cover 12. The valve body 11 is provided with a first matching hole 111, a second matching hole 112 and a third matching hole 113 in sequence along the fluid flow direction. The annular end cover 12 is embedded in the first matching hole 111. Generally speaking, the sizes of the two holes are consistent and aligned in the fluid flow direction. The inner diameter of the annular end cover 12 is smaller than the inner diameter of the second matching hole 112. At this time, the part of the front side of the annular end cover 12 protruding from the second matching hole 112 constitutes a first limiting structure 121. The outer diameter of the second matching hole 112 matches the outer diameter of the limiting protrusion 34. The aperture of the third matching hole 113 is smaller than the aperture of the second matching hole 112, so as to form a second limiting structure 114 at the joint. The outer cylinder wall 37 of the valve core 3 is arranged in cooperation with the third matching hole 113. The front end of the third matching hole 113 forms an inner convex structure 15. One end of the elastic device 2 abuts against the inner convex structure 15, and the other end abuts against the inner shoulder surface 35. The front side of the valve flap 13 has a connecting rod portion 14 extending forward, and the front end of the connecting rod portion 14 is connected to the inner convex structure 15 through two or more cross rod portions 16, wherein the connecting rod portion 14 and the cross rod portion 16 are both flat rods, and the flat and narrow directions are consistent. The valve flap 13, the connecting rod portion 14, the cross rod portion 16 and the valve body 11 are integrally formed and connected. During assembly, the valve core 3 is installed from the rear end of the valve body 11, and then installed into the annular end cover 12 and enters the first matching hole 111. The first matching hole 111, the second matching hole 112, and the third matching hole 113 are preferably cylindrical holes.

[0063] In some embodiments, the switch design of the hydraulic valve covers the full range to adapt to different working conditions. The flow detection function is based on a carefully designed flow detection range, which is designed to ensure that the valve operates under safe operating parameters. The flow detection range is set to be equal to the allowable safe working flow Q. When the fluid flow exceeds the designed safe working fluid threshold, that is, Q>Qmax, the valve core 3 will be excited by the fluid and produce high-frequency vibration, which will be accompanied by the generation of sound. At this time, the flow detection system can identify a signal that exceeds the designed threshold, that is, Q>Qmax.

[0064] The vibration of the valve core 3 is caused by fluid dynamics. When the vibration reaches the designed flow detection threshold, the sound generated by the high-frequency vibration of the valve core 3 can be used as a signal for flow monitoring. Specifically, the vibration sound signal directly detected can be spectrally analyzed by Fourier transform to obtain the frequency and sound pressure information of the sound signal. This process can be vividly described as "listening to the sound to identify the flow", that is, identifying the flow state of the fluid by the characteristics of the sound, thereby realizing real-time monitoring of the fluid flow.

[0065] Within the flow detection range, when the flow Q is equal to the designed safe working flow quantitative value, the high-frequency vibration of the valve core 3 will stop and the sound signal will disappear, indicating that the current flow is within the safe working range. This design not only improves the accuracy of flow monitoring, but also provides a guarantee for the stable operation of the hydraulic system.

[0066] In some embodiments, the fluid valve can be used as a built-in flow detection device or an external flow detection device.

[0067] The built-in flow detection devices include: in-system flow monitoring, which can be integrated into the hydraulic system and flexibly placed at the inlet or outlet of the system according to monitoring requirements. This design allows real-time monitoring of the system flow to ensure that the system operates in the best state; multi-device flow monitoring, the device can simultaneously monitor the flow of multiple key components in the system. Users can place the detection device before and after these components as needed to obtain comprehensive flow data.

[0068] Among them, the external flow detection device: cross-system flow monitoring, this device can be independent of the hydraulic system and installed on multiple different or the same systems. This configuration allows users to centrally monitor and manage the flow of multiple systems; single device multi-system control, through an external flow detection device, the flow of multiple identical or different systems can be controlled. This design improves monitoring efficiency and reduces the demand for internal space of the system.

[0069] In some embodiments, the process of hydraulic valve to achieve flow and pressure regulation is as follows: the incoming liquid flows from the inlet to the outlet of the valve. Initially, the fluid flow and pressure act on the valve core 3, and then the compression spring is used to drive the valve core 3 to undergo elastic deformation. The compression spring has the characteristics of passive balance, which changes due to different spring parameters, thereby achieving the regulation of different valve flows, pressures and different system conditions. The device is based on passive control of flow, utilizes the balancing force of the compression spring, has the flow balancing ability of nonlinear pressure drop, and can control changes in flow and pressure. As the flow increases, the pressure drop also increases; as the flow decreases, the pressure drop also decreases. The device can be installed at different positions of the shunt branch or inside and outside the system to passively control the flow distribution and make the flow distribution more uniform.

[0070] The hydraulic valve has two states. In the first state, the valve is fully open, allowing the maximum flow to pass, and the compression spring does not need to balance the pressure. In the second state, the valve is closed, allowing only the minimum flow to pass, and the compression spring is elastically deformed. The design ensures that the valve core 3 will not pass through the central valve disc 13, and when the flow and pressure decrease, the spring will rebound to its original shape.

[0071] Based on the fluid valve provided in the above embodiment, the present invention further provides a fluid supply system, which includes any one of the fluid valves in the above embodiment, including a filter 200, a pressure vessel 300, a drive pump 400, a heat exchange device 500 and a heater 600 arranged in sequence along the fluid flow direction, and the fluid valve is arranged on the inlet side of the filter 200. Since the fluid supply system adopts the fluid valve in the above embodiment, please refer to the above embodiment for the beneficial effects of the fluid supply system.

[0072] Generally, the heat exchange device 500 includes two heat exchange channels for exchanging heat with each other, one heat exchange channel is connected in series between the driving pump 400 and the heater 600, and the other heat exchange channel is connected to the compressor 700 and the condenser 800 in sequence to serve as an evaporator.

[0073] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0074] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fluid valve, characterized in that: include: Valve body (1); Elastic device (2); A valve core (3) is slidably arranged on the valve body (1) along the direction of fluid flow, the elastic device (2) is arranged between the valve core (3) and the valve body (1), a pressure surface (31) is formed on the liquid inlet side of the valve core (3), and the pressure surface (31) is subjected to a force opposite to the force exerted by the elastic device (2) on the valve core (3), and when the valve core (3) slides relative to the valve body (1) in a direction to reduce the valve opening (5) formed therebetween, the elastic deformation of the elastic device (2) increases; The sound monitoring device (4) is used to identify the vibration sound generated by the valve core (3) within a predetermined flow range.

2. The fluid valve according to claim 1, characterized in that: It also includes a controller, which is connected to the sound monitoring device (4) to obtain the vibration sound signal obtained by the sound monitoring device (4), and the controller can obtain the sound pressure and / or frequency according to the vibration sound signal, and can obtain the flow rate according to the sound pressure and / or the frequency.

3. The fluid valve according to any one of claims 1 to 2, characterized in that: The valve body (1) is provided with a first limiting structure (121) so as to prevent the valve core (3) from continuing to move when the valve core (3) moves to the point where the valve opening (5) opens to a preset maximum opening and abuts against the valve core (3), and the elastic device (2) is in an elastically deformed state.

4. The fluid valve according to claim 3, characterized in that: The valve body (1) is provided with a second limiting structure (114) for preventing the valve core (3) from continuing to move when the valve core (3) moves to the point where the valve port (5) opens to a preset minimum opening and abuts against the valve core (3).

5. The fluid valve according to claim 4, characterized in that: The pressure-bearing surface (31) is in a stepped shape.

6. The fluid valve according to claim 5, characterized in that: The valve body (1) comprises a circulation cavity (17) and a valve flap (13) located at the center of the circulation cavity (17); the valve core (3) is slidably mounted in the circulation cavity (17); a through valve hole (361) is formed in the middle of the valve core (3); when the valve core (3) moves until the valve port (5) is located at the preset minimum opening, the valve flap (13) extends into the valve hole (361); when the valve core (3) moves until the valve port (5) is located at the preset maximum opening, the valve flap (13) is separated from the valve hole (361).

7. The fluid valve according to claim 6, characterized in that: The end of the valve flap (13) facing the fluid forms a circular arc convex surface (131); the end of the valve hole (361) facing the fluid forms a circular arc chamfered structure (362) along the hole edge.

8. The fluid valve according to claim 6, characterized in that: The valve core (3) comprises a limiting protrusion (34), and the first limiting structure (121) and the second limiting structure (114) are both limiting shoulders, respectively used to limit the limiting protrusion (34) in opposite directions.

9. The fluid valve according to claim 8, characterized in that: The valve core (3) has an inner shoulder surface (35) facing opposite to the pressure-bearing surface (31); the elastic device (2) is a compression elastic device, one end of which penetrates into the valve core (3) to abut against the inner shoulder surface (35), and the other end of which abuts against the valve body (1).

10. The fluid valve according to claim 9, characterized in that: The valve core (3) is cylindrical, and the inner wall has an annular inner protrusion (36), and the valve hole (361) is formed by the annular inner protrusion (36); along the fluid flow direction, the rear end of the annular inner protrusion (36) is offset from the rear end surface of the valve core (3) and together constitute the pressure surface (31), and the front end of the annular inner protrusion (36) is offset from the front end surface of the valve core (3) to form the inner shoulder surface (35); the annular limiting protrusion (34) is formed on the outer wall of the valve core (3).

11. A fluid supply system, comprising a filter (200), a pressure container (300), a driving pump (400), a heat exchange device (500) and a heater (600) arranged in sequence along a fluid flow direction, characterized in that: It also comprises a fluid valve (100) as claimed in any one of claims 1 to 10, wherein the fluid valve (100) is arranged on the inlet side of the filter (200).

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