Novel proportional valve

Abstract

The invention relates to the technical field of proportional valve equipment, and discloses a novel proportional valve which comprises a valve body, an adjusting cavity is formed in the middle of the inner side of the valve body, and a valve element used for adjusting the gas-liquid flow proportion is arranged in the adjusting cavity; a connecting sleeve is arranged on one side of the middle of the outer wall of the valve body, a plurality of discharging connecting nozzles are equidistantly formed in the middle of the top end of the connecting sleeve, and a plurality of feeding connecting nozzles are equidistantly formed in the middle of the bottom end of the connecting sleeve; and the discharge-in connecting nozzle and the discharge connecting nozzle are respectively communicated with the interior of the adjusting cavity through internal flow channels at corresponding positions in the valve body. By adding and arranging the fatigue protection mechanism, in the using process of the electromagnetic proportional valve, through the collaborative design of a magnetic ball body and a reset spring, the mechanism firstly utilizes magnetic repulsive force or attractive force to assist the spring to achieve resetting of a valve element, and the problem that resetting is not in place due to spring elasticity attenuation after long-term use is effectively solved; and the adjusting stability of the valve core is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of proportional valve equipment, in particular to a novel proportional valve. BACKGROUND

[0002] As the core equipment for precise regulation and control of fluid in the chemical industry, electromagnetic proportional valves are widely used in key links such as low-temperature medium conveying and deep cooling reaction control, especially in systems such as liquid nitrogen preparation, liquefied natural gas storage and transportation, and ultra-low temperature refrigerant circulation, which bear the important functions of dynamic flow regulation and pressure stability control. The working environment temperature of such systems is often as low as-150℃ or even close to-200℃ in some extreme conditions, which puts strict requirements on the material stability, sealing reliability and control accuracy of the valve body. The existing electromagnetic proportional valves are mostly designed based on conventional industrial environments, and the core sealing components of which generally use elastic materials such as nitrile rubber and fluororubber. Such materials will undergo glass transition under low temperature conditions, gradually losing elasticity and sealing performance, resulting in a sharp increase in the risk of medium leakage. At the same time, the mechanical transmission components of the valve body are mostly made of ordinary alloy steel, which changes its lattice structure under ultra-low temperature conditions, significantly increasing its brittleness and easily causing cracks or even breakage due to slight vibration or stress concentration, directly affecting the regulation and response performance of the valve.

[0003] In ultra-low temperature chemical conveying systems, the failure of electromagnetic proportional valves not only leads to medium loss and process parameter fluctuation, but also may cause serious safety hazards. For example, the sealing failure of proportional valves in liquefied natural gas conveying pipelines may cause natural gas leakage, which, when mixed with air, forms an explosive mixture. Valve jam in liquid nitrogen systems may cause pipeline overpressure, leading to equipment explosion or low-temperature frostbite accidents. In addition, the control accuracy of traditional proportional valves may decrease due to valve core jam under ultra-low temperature, which directly affects the uniformity of deep cooling reactions and reduces product qualification rate. At present, the temporary solutions in the industry for ultra-low temperature environments mostly rely on high-frequency maintenance and replacement or the use of customized valve bodies with high cost, which not only increases production and operation costs, but also leads to a decrease in production efficiency due to frequent shutdown for maintenance. Therefore, the technical personnel in the field propose a novel proportional valve to solve the above technical problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a novel proportional valve, which solves the problem that the existing electromagnetic proportional valve is easily affected by low temperature and causes sealing failure when used in an ultra-low temperature conveying system.

[0005] To achieve the above purpose, the present application is implemented by the following technical scheme: a novel proportional valve, comprising a valve body, a regulating cavity is formed in the middle of the inner side of the valve body, and a valve core for regulating the proportion of gas-liquid flow is arranged inside the regulating cavity; A connecting sleeve is arranged on one side of the middle part of the outer wall of the valve body, a plurality of discharge connecting mouths are equidistantly arranged on the middle part of the top end of the connecting sleeve, and a plurality of inlet connecting mouths are equidistantly arranged on the middle part of the bottom end of the connecting sleeve. The inlet connecting mouths and the discharge connecting mouths are respectively connected with the inside of the adjusting cavity through the internal flow channels at the corresponding positions inside the valve body. A non-contact control mechanism is arranged on one side of the inside of the adjusting cavity, and is used for controlling the movement of the valve core in the flow proportion adjusting process in a non-mechanical contact mode. A low-temperature protection mechanism is arranged on the valve core, and is used for low-temperature sealing protection when the valve body transports low-temperature or ultralow-temperature medium. A fatigue protection mechanism is arranged on one side of the inside of the adjusting cavity, and is used for protecting the loss of elasticity caused by long-time use of the valve body. A surplus recovery mechanism is arranged on one side of the outside of the valve body, and is used for recovering the surplus energy when the pressure of the gas-liquid medium supplied into the valve body is too high.

[0006] Preferably, the non-contact control mechanism comprises a mounting seat one, the mounting seat one is arranged on one end of the inside of the adjusting cavity, an outer ring sleeve is arranged on one side of the middle part of the inside of the valve body close to the mounting seat one, a spiral mounting rod is arranged in the inside of the outer ring sleeve, an excitation coil is arranged on the spiral mounting rod, and a microcontroller is arranged on one side of the middle part of the valve body close to the mounting seat one.

[0007] Preferably, the non-contact control mechanism further comprises an adjusting seat, the adjusting seat is movably arranged in the inside of the mounting seat one, one end of the valve core penetrates through the mounting seat one and is connected with the middle part of the adjusting seat, one side of the adjusting seat away from the valve core and the inside of the mounting seat one constitute a filling cavity, the filling cavity is filled with a magneto-rheological fluid, and the magneto-rheological fluid is transformed between a liquid state and a solid-like state under the action of a magnetic field generated by the excitation coil.

[0008] Preferably, the low-temperature protection mechanism comprises a permanent magnet sleeve, the permanent magnet sleeve is arranged in the inside of the connecting sleeve, and a plurality of magnetic conductive rings are equidistantly arranged on the inside of the valve body, and the plurality of magnetic conductive rings conduct and enhance the magnetic field generated by the permanent magnet sleeve.

[0009] Preferably, the low-temperature protection mechanism further comprises annular grooves, a plurality of annular grooves are equidistantly arranged on the inner sides of the two end portions of the valve core, low-temperature-resistant silica gel sleeves are arranged on the outer walls of the two end portions of the valve core, the annular grooves are open, the top portions of the annular grooves are respectively covered and sealed by the inner walls of the low-temperature-resistant silica gel sleeves, and the interiors of the annular grooves are filled with magnetic fluids. When the magnetic fluids are attracted and guided by the magnetic field formed by the magnetic conductive ring, the magnetic fluids move outward in the annular grooves to support the corresponding positions of the low-temperature-resistant silica gel sleeves to form protruding sealing portions, and the protruding sealing portions dynamically seal the contact positions of the valve core and the adjusting cavity.

[0010] Preferably, the fatigue protection mechanism comprises a mounting seat two, the mounting seat two is arranged on the end of the adjusting cavity away from the mounting seat one, a moving ring seat is arranged on the side of the mounting seat two close to the valve core, a return spring is arranged on one side of the mounting seat two, and the end of the return spring away from the mounting seat two is connected to the corresponding position of the moving ring seat, and a displacement sensor is arranged on the side of the middle portion of the mounting seat two close to the valve core.

[0011] Preferably, the fatigue protection mechanism further comprises a rotating rod, the rotating rod is rotatably connected to the interior of the mounting seat two, a magnetic sphere is fixedly connected to the middle portion of the rotating rod, one half of the magnetic poles of the magnetic sphere adjacent to one end of the valve core is of the same polarity, torsional springs are arranged on the two ends of the rotating rod, connecting wires are arranged on the two sides of the middle portion of the rotating rod, and the other ends of the connecting wires sequentially pass through the corresponding positions of the return springs and are connected to the corresponding positions of the moving ring seat.

[0012] Preferably, the excess recovery mechanism comprises an energy accumulator, the energy accumulator is arranged on the front side of the middle portion of the adapter sleeve, the bottom ends of the energy accumulator are communicated with the internal flow passages of the discharge connection nozzles through backflow tubes, and pressure sensors are arranged on the discharge connection nozzles.

[0013] Preferably, the excess recovery mechanism further comprises a controller, the controller is arranged on the front side of the middle portion of the energy accumulator, a discharge check valve is arranged on one of the backflow tubes, and a throttle valve is arranged on the other backflow tube.

[0014] Working principle: in the process of using electromagnetic proportional valve to transport low temperature or ultra-low temperature medium, first, the non-contact control mechanism is started, the low temperature or ultra-low temperature medium is injected into the adjusting cavity in the valve body through the discharge connection nozzle on the adapter sleeve, and the discharge proportion of the low temperature or ultra-low temperature medium is adjusted by the valve core in the adjusting cavity, then the low temperature or ultra-low temperature medium after proportional adjustment is discharged through the discharge connection nozzle, when the low temperature or ultra-low temperature medium in the chemical system is transported and proportionally adjusted, the staff sends control signals to the microcontroller on the valve body through the remote control device, the microcontroller controls the excitation coil on the screw installation rod to be electrified after receiving the control signals, when the excitation coil in the outer ring sleeve is electrified, the magnetic field generated by the excitation coil acts on the magnetorheological fluid in the mounting seat one, so that the viscosity of the magnetorheological fluid increases instantaneously, the magnetorheological fluid changes from liquid state to solid-like state, and the shear force generated by the magnetorheological fluid also synchronously drives the adjusting seat in the mounting seat one to move synchronously, the adjusting seat moves synchronously while driving the valve core on it to move and adjust in the adjusting cavity in the valve body, so that the output of the low temperature or ultra-low temperature medium in the adjusting cavity is changed synchronously, when the valve core moves and adjusts the output flow proportion, the displacement sensor on the mounting seat two also synchronously monitors the moving position of the valve core in the adjusting cavity and feeds back the signal to the control system, the control system adjusts the current of the excitation coil according to the target value, so as to change the magnetic field strength, and at the same time control the viscosity and shear force of the magnetorheological fluid in the mounting seat one, so as to realize the accurate control of the position of the valve core in the adjusting cavity, and then adjust the flow and pressure of the transported medium, when the valve core in the adjusting cavity needs to be reset, the microcontroller cuts off or reduces the current of the excitation coil, the magnetic field disappears, the magnetorheological fluid in the mounting seat one returns to liquid state, and at the same time the reset spring and the moving ring seat on the mounting seat two push the valve core in the adjusting cavity to reset to the initial position, so as to complete the non-contact control and adjustment process of the electromagnetic proportional valve; then the low temperature protection mechanism is started, when the electromagnetic proportional valve faces some low temperature or ultra-low temperature medium, the rubber sealing element on the valve core will harden and fail due to low temperature or ultra-low temperature, at this time the permanent magnet ring in the adapter sleeve generates a magnetic field, the magnetic field generated by the permanent magnet ring is conducted and amplified through the plurality of magnetic conductive rings in the valve body, so that the magnetic fluid originally in the annular groove is expanded outward under the influence of the annular magnetic field, and the low temperature resistant silica gel sleeve on both ends of the valve core is squeezed at the same time, so that a plurality of convex sealing parts are formed on the low temperature resistant silica gel sleeve, a plurality of sealing flow blocking rings composed of a plurality of stable convex sealing parts are formed, so as to prevent low temperature fluid leakage, when the non-contact control mechanism controls the valve core in the adjusting cavity to move and adjust, the valve core adjusts the cross-sectional area of the fluid passage in the adjusting cavity while moving, because the magnetic fluid has certain plasticity and adhesion, when the valve core moves, the valve core has small moving resistance and fast response speed, and there is no leakage problem caused by the change of the valve core position, so as to complete the sealing and protection process of the electromagnetic proportional valve in the low temperature or ultra-low temperature state.After the fatigue protection mechanism starts, after the solenoid proportional valve is used for a long time, the reset spring in the adjusting cavity will be caused by long time use, causing the elasticity to decrease, so that when the valve core in the adjusting cavity is pushed by the reset spring to reset, the reset spring will not be reset to the position, when the valve core in the adjusting cavity is driven by the non-contact control mechanism to adjust the medium flow and pressure, the valve core moves in the direction of the mounting seat two, the valve core moves while pressing the moving ring seat to move synchronously, the reset spring on the moving ring seat is synchronously pressed to shrink when the moving ring seat is synchronously pressed to move, the reset spring shrinks while the torsional spring in the mounting seat two is weakened by the traction, the torsional spring synchronously drives the rotating rod and the magnetic ball thereon to rotate, so that the magnetic pole on the magnetic ball rotates to the magnetic pole adjacent to one end of the valve core, according to the principle that the same poles repel and different poles attract, the magnetic ball attracts the valve core in the adjusting cavity by magnetic attraction, ensures the stability of the valve core during flow adjustment, and simultaneously winds up the excess part of the connecting line while the rotating rod rotates, so that the reset spring is prevented from being affected. Conversely, when the valve core in the adjusting cavity needs to be reset, due to the spring elasticity fatigue, the reset spring cannot provide sufficient reset thrust to the valve core, at this time, as the reset spring gradually opens, the moving ring seat is synchronously pushed by the synchronously opened reset spring to move synchronously, the reset spring drives the rotating rod to rotate while opening, the connecting line on the rotating rod is discharged from the winding state and simultaneously presses the torsional spring on the rotating rod, and then the magnetic ball on the rotating rod is synchronously rotated while the rotating rod rotates, so that the magnetic pole on the magnetic ball rotates to the magnetic pole adjacent to one end of the valve core. The same repulsion between the magnetic ball and the end of the valve core is used to cooperate with the reset spring, so as to assist the valve core in adjusting and resetting after a long time of use. Then the excess recovery mechanism starts, when the pressure of the medium discharged into the connecting mouth is higher than the set value, the pressure sensor transmits a signal to the controller on the accumulator, the controller opens the discharge check valve on the return pipe, at this time, the excess medium enters the storage capacity of the accumulator, and then as the medium in the accumulator continuously increases, the pressure in the accumulator also gradually increases, when the pressure of the medium discharged into the connecting mouth is lower than the set value, the controller controls the throttle valve on the return pipe to open, the high-pressure medium in the accumulator is supplemented into the medium discharged into the connecting mouth after being adjusted by the throttle valve, and the storage capacity of the accumulator is released at the same time. The throttle valve also adjusts the discharge flow according to the change of the medium discharged into the connecting mouth, ensures that the supplemented medium enters the valve body stably, so as to complete the energy recovery and reuse of the excess medium.

[0015] The application provides a novel proportional valve. 1. The application adds and sets a non-contact control mechanism. During the use of the electromagnetic proportional valve, the mechanism adopts a non-mechanical contact driving mode of magnetorheological fluid cooperating with the excitation coil. Not only is the direct friction between components in the traditional mechanical transmission avoided, reducing the risk of failure due to wear and tear, but also the overall service life of the valve body is prolonged. Moreover, through precise regulation of the magnetic field strength, the valve core moves smoothly, can maintain stable adjustment response in an ultra-low temperature environment, effectively avoids the influence of low-temperature embrittlement of mechanical components on control accuracy, and ensures the accuracy and reliability of flow proportional regulation.

[0016] 2. The application adds and sets a low-temperature protection mechanism. During the use of the electromagnetic proportional valve, the mechanism cooperates with the magnetic fluid, the permanent magnet ring and the magnetic conducting ring. On the one hand, the magnetic field guides the dynamic jacking of the low-temperature-resistant silica gel sleeve to form a convex sealing part, solving the problem of hardening failure of traditional rubber sealing elements in an ultra-low temperature environment, realizing reliable sealing of the contact position between the valve core and the adjusting cavity. On the other hand, the plasticity of the magnetic fluid enables it to maintain sealing effect with the movement of the valve core, not only adapting to the delivery demand of ultra-low temperature medium, but also avoiding the leakage risk caused by sealing failure, ensuring the safety of system operation.

[0017] 3. The application adds and sets a fatigue protection mechanism. During the use of the electromagnetic proportional valve, the mechanism cooperates with the magnetic ball and the return spring. First, the magnetic repulsion or attraction force assists the spring to reset the valve core, effectively compensating for the problem of incomplete reset caused by spring elasticity attenuation after long-term use, ensuring the stability of valve core adjustment. Second, the cooperation of the torsional spring and the connecting wire avoids interference between components, reduces the load pressure of the spring, delays the fatigue speed, prolongs the service life of the core components, and reduces the cost of frequent maintenance.

[0018] 4. The application adds and sets a surplus recovery mechanism. During the use of the electromagnetic proportional valve, the mechanism cooperates with the accumulator, the one-way valve and the throttle valve. Not only can it store and reuse the excess pressure energy during medium delivery, reducing energy waste and realizing energy-saving operation of the system, but also can stabilize the pipeline pressure by supplementing the stored high-pressure medium, avoiding the influence of pressure fluctuation on the adjustment accuracy of the valve core, reducing the risk of equipment damage caused by overpressure, and improving the economy and stability of system operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front side structure schematic diagram of the application; Figure 2 It is a rear side structure schematic diagram of the application; Figure 3 It is a valve body internal structure cross-sectional view schematic diagram of the application; Figure 4It is the inside structure section view schematic diagram of outer ring cover of the application; Figure 5 It is the inside structure section view schematic diagram of mounting seat of the application; Figure 6 It is the inside structure section view schematic diagram of adapter sleeve of the application; Figure 7 It is the valve core sealing state structure schematic diagram of the application; Figure 8 It is the inside structure section view schematic diagram of valve core of the application; Figure 9 It is the mounting seat two partial structure schematic diagram of the application; Figure 10 It is the rotating rod partial structure schematic diagram of the application.

[0020] Wherein, 1, valve body; 2, discharge one-way valve; 3, backflow pipe; 4, throttle valve; 5, energy accumulator; 6, adapter sleeve; 7, discharge connecting nozzle; 8, controller; 9, microcontroller; 10, discharge connecting nozzle; 11, mounting seat one; 12, outer ring cover; 13, adjusting cavity; 14, magnetic conducting ring; 15, valve core; 16, moving ring seat; 17, reset spring; 18, connecting line; 19, mounting seat two; 20, excitation coil; 21, spiral mounting rod; 22, magnetic rheological fluid; 23, adjusting seat; 24, low-temperature-resistant silica gel sleeve; 25, permanent magnetic sleeve ring; 26, convex sealing part; 27, annular recess; 28, magnetic fluid; 29, magnetic sphere; 30, displacement sensor; 31, rotating rod; 32, torsion spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings of the specification of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0022] Please refer to the accompanying drawings of the application Figure 1 - the accompanying drawings of the application Figure 3 The embodiment of the application provides a novel proportional valve, which comprises a valve body 1, an adjusting cavity 13 is formed in the middle part of the inner side of the valve body 1, and a valve core 15 for adjusting the flow proportion of gas and liquid is arranged in the adjusting cavity 13; an adapter sleeve 6 is arranged on one side of the middle part of the outer wall of the valve body 1, a plurality of discharge connecting nozzles 7 are equidistantly formed in the middle part of the top end of the adapter sleeve 6, and a plurality of discharge connecting nozzles 10 are equidistantly formed in the middle part of the bottom end of the adapter sleeve 6; The discharge connecting nozzles 10 and the discharge connecting nozzles 7 are respectively communicated with the inside of the adjusting cavity 13 through the internal flow channels at the corresponding positions in the inside of the valve body 1; Please refer to the accompanying drawings of the application Figure 4 - the accompanying drawings of the applicationFigure 5 The non-contact control mechanism is arranged on the inner side of the adjusting cavity 13, and is used to control the movement of the valve core 15 in the flow proportional adjustment by non-mechanical contact. The non-contact control mechanism comprises a mounting seat 11, the mounting seat 11 is arranged on one end of the inside of the adjusting cavity 13, an outer ring sleeve 12 is arranged on the middle side of the inside of the valve body 1 close to the mounting seat 11, a spiral mounting rod 21 is arranged in the inside of the outer ring sleeve 12, an excitation coil 20 is arranged on the spiral mounting rod 21, and a microcontroller 9 is arranged on the middle side of the valve body 1 close to the mounting seat 11.

[0023] When the non-contact control mechanism is started, the low-temperature or ultralow-temperature medium is injected into the adjusting cavity 13 in the valve body 1 through the discharge connecting nozzle 10 on the adapter sleeve 6, and the discharge proportion of the low-temperature or ultralow-temperature medium is adjusted by the valve core 15 in the adjusting cavity 13, and then the low-temperature or ultralow-temperature medium after the proportional adjustment is discharged through the discharge connecting nozzle 7.

[0024] When the low-temperature or ultralow-temperature medium in the chemical system is transported and proportionally adjusted, the staff sends a control signal to the microcontroller 9 on the valve body 1 through a remote control device, the microcontroller 9 controls the excitation coil 20 on the spiral mounting rod 21 to be electrified after receiving the control signal, when the excitation coil 20 in the outer ring sleeve 12 is electrified, the magnetic field generated by the excitation coil 20 acts on the magnetorheological fluid 22 in the mounting seat 11, so that the viscosity of the magnetorheological fluid 22 instantaneously increases, the magnetorheological fluid 22 changes from liquid state to quasi-solid state, and the shear force generated by the magnetorheological fluid 22 simultaneously pushes the adjusting seat 23 in the mounting seat 11 to move synchronously, the adjusting seat 23 moves while synchronously driving the valve core 15 on the adjusting seat 23 to move and adjust in the adjusting cavity 13 in the valve body 1, so that the output of the low-temperature or ultralow-temperature medium in the adjusting cavity 13 is synchronously changed.

[0025] The non-contact control mechanism further comprises an adjusting seat 23, the inside of the mounting seat 11 is provided with the adjusting seat 23 which can be moved and adjusted, one end of the valve core 15 penetrates through the mounting seat 11 and is connected to the middle part of the adjusting seat 23, the side of the adjusting seat 23 away from the valve core 15 forms a filling cavity with the inside of the mounting seat 11, the filling cavity is filled with the magnetorheological fluid 22, and the state of the magnetorheological fluid 22 is converted between liquid state and quasi-solid state under the action of the magnetic field generated by the electrification of the excitation coil 20.

[0026] When the valve core 15 moves to adjust the output flow rate, the displacement sensor 30 on the mounting seat 2 19 synchronously monitors the movement position of the valve core 15 in the adjusting cavity 13 and feeds back a signal to the control system, which adjusts the current of the excitation coil 20 according to a target value, thereby changing the magnetic field strength and controlling the viscosity and shear force of the magneto-rheological fluid 22 in the mounting seat 1 11, so as to accurately control the position of the valve core 15 in the adjusting cavity 13, and further adjust the flow rate and pressure of the delivered medium.

[0027] When the valve core 15 in the adjusting cavity 13 needs to be reset, the microcontroller 9 cuts off or reduces the current of the excitation coil 20, the magnetic field disappears, the magneto-rheological fluid 22 in the mounting seat 1 11 returns to a liquid state, and the reset spring 17 and the moving ring seat 16 on the mounting seat 2 19 push the valve core 15 in the adjusting cavity 13 to reset to the initial position, thereby completing the non-contact control and adjustment process of the electromagnetic proportional valve.

[0028] Please refer to the accompanying drawings Figure 6 - the accompanying drawings Figure 8 , a low-temperature protection mechanism arranged on the valve core 15 for low-temperature sealing protection when the valve body 1 delivers low-temperature or ultralow-temperature medium; The low-temperature protection mechanism includes a permanent magnet ring 25, the inside of the adapter sleeve 6 is provided with the permanent magnet ring 25, and the inside of the valve body 1 is provided with a plurality of magnetic conductive rings 14 equidistantly arranged in the middle part, and the plurality of magnetic conductive rings 14 conduct and enhance the magnetic field generated by the permanent magnet ring 25.

[0029] When the low-temperature protection mechanism is started, the rubber sealing element on the valve core 15 will harden and fail due to the influence of low-temperature or ultralow-temperature when the electromagnetic proportional valve faces some low-temperature or ultralow-temperature medium, at which time the permanent magnet ring 25 in the adapter sleeve 6 generates a magnetic field, which is conducted and amplified by the plurality of magnetic conductive rings 14 in the valve body 1, so that the magnetic fluid 28 originally in the annular groove 27 is expanded outwardly under the influence of the annular magnetic field, and the magnetic fluid 28 extrudes the low-temperature-resistant silica gel sleeve 24 on both ends of the valve core 15 while expanding outwardly, thereby forming a plurality of protruding sealing parts 26 on the low-temperature-resistant silica gel sleeve 24, and a plurality of sealing flow-blocking rings formed by the plurality of stable protruding sealing parts 26 prevent low-temperature fluid from leaking.

[0030] The low-temperature protection mechanism further comprises annular grooves 27, a plurality of annular grooves 27 are equidistantly arranged on the inner sides of the two end portions of the valve core 15, low-temperature resistant silica gel sleeves 24 are arranged on the outer walls of the two end portions of the valve core 15, the annular grooves 27 are open, the top portions of the annular grooves 27 are respectively covered and sealed by the inner walls of the low-temperature resistant silica gel sleeves 24, and the annular grooves 27 are filled with magnetic fluids 28. When the magnetic fluids 28 are attracted and guided by the magnetic field formed by the magnetic conductive ring 14, the magnetic fluids 28 move outward in the annular grooves 27, support the low-temperature resistant silica gel sleeves 24 at the corresponding positions, and generate protruding sealing portions 26. The protruding sealing portions 26 dynamically seal the contact position between the valve core 15 and the adjusting cavity 13.

[0031] When the non-contact control mechanism controls the valve core 15 in the adjusting cavity 13 to move and adjust, the valve core 15 adjusts the sectional area of the fluid passage in the adjusting cavity 13 while moving. Since the magnetic fluids 28 have plasticity and adhesion, the valve core 15 has small moving resistance and fast response speed when moving, and will not leak due to the change of the position of the valve core 15. In this way, the sealing and protection of the electromagnetic proportional valve in the low-temperature or ultralow-temperature state are completed.

[0032] Please refer to the accompanying drawings Figure 9 - the accompanying drawings Figure 10 , the fatigue protection mechanism is arranged on one side of the inside of the adjusting cavity 13, and is used for protecting the loss of elasticity caused by long-time use of the valve body 1. The fatigue protection mechanism comprises a second mounting seat 19, the second mounting seat 19 is arranged on the end of the adjusting cavity 13 away from the first mounting seat 11, a moving ring seat 16 is arranged on the side of the second mounting seat 19 close to the valve core 15, a return spring 17 is arranged on one side of the second mounting seat 19, the end of the return spring 17 away from the second mounting seat 19 is connected to the corresponding position of the moving ring seat 16, and a displacement sensor 30 is arranged on the side of the middle portion of the second mounting seat 19 close to the valve core 15.

[0033] When the fatigue protection mechanism is started, after the electromagnetic proportional valve is used for a long time, the return spring 17 in the adjusting cavity 13 will lose elasticity due to long-time use, so that the valve core 15 in the adjusting cavity 13 will not be reset to the position when the return spring 17 pushes the valve core 15 to reset.

[0034] When the valve core 15 in the adjusting cavity 13 is driven by the non-contact control mechanism to adjust the medium flow and pressure, the valve core 15 moves in the direction of the mounting base two 19, and the valve core 15 extrudes the moving ring seat 16 to move synchronously, and the reset spring 17 on the moving ring seat 16 is extruded to shrink synchronously, and the traction of the torsional spring 32 in the mounting base two 19 is weakened, and the torsional spring 32 drives the rotating rod 31 and the magnetic sphere 29 on it to rotate, so that the magnetic pole on the magnetic sphere 29 rotates to be opposite to the magnetic pole adjacent to one end of the valve core 15, according to the principle that the same poles repel each other and the opposite poles attract each other, the magnetic sphere 29 attracts the valve core 15 in the adjusting cavity 13 by magnetic attraction, to ensure the stability of the valve core 15 during flow adjustment, and the excess part of the connecting line 18 is wound up when the rotating rod 31 rotates, to prevent the reset spring 17 from being affected.

[0035] The fatigue protection mechanism further comprises a rotating rod 31, the rotating rod 31 is rotatably connected in the mounting base two 19, the middle part of the rotating rod 31 is fixedly connected with the magnetic sphere 29, one half of the magnetic poles of the magnetic sphere 29 is the same as the magnetic pole adjacent to one end of the valve core 15, the two ends of the rotating rod 31 are provided with the torsional spring 32, and the two sides of the middle part of the rotating rod 31 are provided with the connecting line 18, and the other end of the connecting line 18 penetrates through the corresponding position of the reset spring 17 and is connected with the corresponding position of the moving ring seat 16.

[0036] Conversely, when the valve core 15 in the adjusting cavity 13 needs to be reset, due to spring elastic fatigue, the reset spring 17 cannot provide enough reset thrust to the valve core 15, at this time, as the reset spring 17 is gradually opened, the moving ring seat 16 is pushed by the reset spring 17 to move synchronously, the reset spring 17 drives the rotating rod 31 to rotate while being opened, the connecting line 18 on the rotating rod 31 is discharged from the winding state and simultaneously extrudes the torsional spring 32 on the rotating rod 31, and then the magnetic sphere 29 on the rotating rod 31 rotates synchronously while the rotating rod 31 rotates, so that the magnetic pole on the magnetic sphere 29 rotates to be the same as the magnetic pole adjacent to one end of the valve core 15, and the same repulsion force generated by the magnetic sphere 29 and the end of the valve core 15 cooperates with the reset spring 17, to assist the valve core 15 in adjusting and resetting after a long time of use.

[0037] Please refer to the accompanying drawings Figure 1 The accompanying drawings Figure 2 The excess recovery mechanism is arranged on the outer side of the valve body 1, and is used for recovering the excess energy of the gas-liquid medium supplied into the valve body 1 when the pressure is too high.

[0038] The excess recovery mechanism comprises an accumulator 5, the accumulator 5 is arranged in the middle of the front side of the adapter sleeve 6, the bottom end of the accumulator 5 is communicated with the internal flow channel of the discharge connection nozzle 10 through the return pipes 3, and the discharge connection nozzle 10 is provided with a pressure sensor.

[0039] When the pressure of the discharge medium in the discharge connection nozzle 10 is higher than the set value, the pressure sensor transmits a signal to the controller 8 of the accumulator 5, the controller 8 opens the discharge check valve 2 of the return pipe 3, and the excess medium is stored in the accumulator 5.

[0040] The excess recovery mechanism further comprises a controller 8, the controller 8 is arranged in the middle of the front side of the accumulator 5, the discharge check valve 2 is arranged on one return pipe 3, and the throttle valve 4 is arranged on the other return pipe 3.

[0041] Then, with the continuous increase of the medium in the accumulator 5, the pressure in the accumulator 5 is gradually increased, when the pressure of the discharge medium in the discharge connection nozzle 10 is lower than the set value, the controller 8 controls the throttle valve 4 on the return pipe 3 to open, the high-pressure medium in the accumulator 5 is supplemented into the discharge medium in the discharge connection nozzle 10 through the adjustment of the throttle valve 4, and the storage capacity of the accumulator 5 is released at the same time, the throttle valve 4 also adjusts the discharge flow according to the change of the discharge medium in the discharge connection nozzle 10, ensures that the supplemented medium enters the valve body 1 stably, and completes the recovery and reuse of the energy of the excess medium.

[0042] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A novel proportional valve, characterized in that, include Valve body (1), with an adjustment chamber (13) in the middle of the inner side of the valve body (1), and a valve core (15) for adjusting the gas-liquid flow ratio is provided inside the adjustment chamber (13). A connecting sleeve (6) is provided on one side of the middle part of the outer wall of the valve body (1). Multiple discharge connecting nozzles (7) are equidistantly opened at the top center of the connecting sleeve (6), and multiple discharge connecting nozzles (10) are equidistantly opened at the bottom center of the connecting sleeve (6). The inlet connector (10) and the outlet connector (7) are connected to the inside of the regulating chamber (13) through the internal flow channels at corresponding positions inside the valve body (1); A non-contact control mechanism is located inside the regulating chamber (13) and is used to control the movement of the valve core (15) during flow ratio regulation in a non-mechanical contact manner. The low-temperature protection mechanism is installed on the valve core (15) and is used to perform low-temperature sealing protection when the valve body (1) is conveying low-temperature or ultra-low-temperature media; The fatigue protection mechanism is located inside the regulating cavity (13) and is used to protect the valve body (1) from loss of elasticity caused by long-term use. The excess energy recovery mechanism is located on the outside of the valve body (1) and is used to recover excess energy when the pressure of the gas-liquid medium supplied into the valve body (1) is too high.

2. The novel proportional valve according to claim 1, characterized in that, The non-contact control mechanism includes a mounting base (11), which is provided at one end of the regulating cavity (13). An outer ring sleeve (12) is provided on the side of the valve body (1) near the middle of the mounting base (11). A spiral mounting rod (21) is provided inside the outer ring sleeve (12). An excitation coil (20) is provided on the spiral mounting rod (21). A microcontroller (9) is provided on the middle of the side of the valve body (1) near the mounting base (11).

3. A novel proportional valve according to claim 2, characterized in that, The non-contact control mechanism also includes an adjustment seat (23). The installation seat (11) is provided with a movable and adjustable adjustment seat (23). One end of the valve core (15) passes through the installation seat (11) and is connected to the middle of the adjustment seat (23). The side of the adjustment seat (23) away from the valve core (15) forms a filling cavity with the interior of the installation seat (11). The filling cavity is filled with magnetorheological fluid (22). Under the action of the magnetic field generated by the excitation coil (20) being energized, the state of the magnetorheological fluid (22) changes between liquid and solid-like state.

4. A novel proportional valve according to claim 1, characterized in that, The cryogenic protection mechanism includes a permanent magnet collar (25). The connecting sleeve (6) is provided with a permanent magnet collar (25). Multiple magnetic rings (14) are equidistantly arranged in the middle of the inner side of the valve body (1). The multiple magnetic rings (14) conduct and enhance the magnetic field generated by the permanent magnet collar (25).

5. A novel proportional valve according to claim 4, characterized in that, The low-temperature protection mechanism also includes annular grooves (27). Multiple annular grooves (27) are equidistantly arranged inside both ends of the valve core (15). Low-temperature resistant silicone sleeves (24) are provided on the outer walls of both ends of the valve core (15). The annular grooves (27) are all open, and the top of the annular grooves (27) are covered and sealed by the inner wall of the low-temperature resistant silicone sleeves (24). The interior of the annular grooves (27) is filled with magnetic fluid (28). When the magnetic fluid (28) is attracted and guided by the magnetic field formed by the magnetic ring (14), the magnetic fluid (28) moves outward in the annular grooves (27) and pushes the corresponding position of the low-temperature resistant silicone sleeves (24) to generate a raised sealing part (26). The raised sealing part (26) performs dynamic sealing treatment at the contact position between the valve core (15) and the regulating cavity (13).

6. A novel proportional valve according to claim 1, characterized in that, The fatigue protection mechanism includes a second mounting base (19). The second mounting base (19) is provided on the end of the adjustment cavity (13) away from the first mounting base (11). A movable ring seat (16) is provided on the side of the second mounting base (19) near the valve core (15). A return spring (17) is provided on one side of the second mounting base (19), and the end of the return spring (17) away from the second mounting base (19) is connected to the corresponding position of the movable ring seat (16). A displacement sensor (30) is provided on the middle side of the second mounting base (19) near the valve core (15).

7. A novel proportional valve according to claim 6, characterized in that, The fatigue protection mechanism also includes a rotating rod (31). The rotating rod (31) is rotatably connected inside the mounting base (19). A magnetic ball (29) is fixedly connected to the middle of the rotating rod (31). Half of the magnetic poles of the magnetic ball (29) are of the same polarity as the end adjacent to the valve core (15). Torsion springs (32) are provided on both ends of the rotating rod (31). Connecting lines (18) are provided on both sides of the middle of the rotating rod (31). The other end of the connecting line (18) passes through the corresponding position of the reset spring (17) and connects to the corresponding position of the moving ring seat (16).

8. A novel proportional valve according to claim 1, characterized in that, The residual recovery mechanism includes an accumulator (5). An accumulator (5) is provided in the middle of the front side of the connecting sleeve (6). Both sides of the bottom end of the accumulator (5) are connected to the internal flow channel of the discharge port (10) through the return pipe (3). A pressure sensor is provided on the discharge port (10).

9. A novel proportional valve according to claim 8, characterized in that, The residual recovery mechanism also includes a controller (8), which is located in the middle of the front side of the accumulator (5). One of the return pipes (3) is equipped with a discharge check valve (2), and the other return pipe (3) is equipped with a throttle valve (4).

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