Self-generating electromagnetic force static sealing electric stop valve

Abstract

The invention relates to the technical field of stop valves, in particular to a self-generating electromagnetic force static sealing electric stop valve which comprises a valve body control system, a through hole is formed in a valve body, a sealing seat is fixedly connected in the through hole, a valve rod is slidably connected in a valve rod, and a valve block is fixedly connected to the bottom of the valve rod. A magnet ring is fixedly connected to the bottom of the valve block, external threads are arranged on the outer portion of the valve rod, a limiting barrel is fixedly connected to the top of the valve seat, a limiting rod is slidably connected into the limiting barrel, a fixing frame is fixedly connected to the top of the limiting rod, and a nut block is fixedly connected into the fixing frame. According to the valve, the power generation assembly in the valve body can generate power autonomously, power is provided for the driving assembly and other electrical components, dependence on an external power source is reduced, the valve is suitable for fields, remote areas and other scenes where power supply is inconvenient, the valve body control system controls and manages the power generation assembly, the driving assembly and the magnet ring, and in addition, the sealing force can be dynamically adjusted.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of stop valves, in particular to a self-generating electromagnetic force static sealing electric stop valve. BACKGROUND

[0002] In many fields of industrial production, electric stop valves, as a kind of key fluid control equipment, are widely used in pipeline systems to realize the functions of cutting off, regulating and guiding fluid medium. With the continuous improvement of industrial automation level, higher and higher requirements are put forward for the control accuracy, sealing performance, response speed and energy consumption of electric stop valves.

[0003] There are two major problems in the existing electric stop valve control system: first, the energy depends on external power supply, and cannot be stably operated in remote pipeline network, emergency repair and other scenes without external power supply, and the traditional battery energy storage mode needs to be replaced regularly, with high maintenance cost; second, the sealing performance regulation depends on the preset program, and cannot be dynamically adjusted according to the real-time working condition. SUMMARY

[0004] In view of the technical problems in the background art, the application provides a self-generating electromagnetic force static sealing electric stop valve.

[0005] The technical scheme adopted by the application is as follows: a self-generating electromagnetic force static sealing electric stop valve, comprising a valve body and a valve body control system, a through hole is arranged in the valve body, a sealing seat is fixedly connected in the through hole, a valve rod is slidably connected in the valve rod, a valve block is fixedly connected to the bottom of the valve rod, a magnet ring is fixedly connected to the bottom of the valve block, an external thread is arranged on the outer portion of the valve rod, a limiting cylinder is fixedly connected to the top of the valve seat, a limiting rod is slidably connected in the limiting cylinder, a fixing frame is fixedly connected to the top of the limiting rod, a nut block is fixedly connected in the fixing frame, the valve rod is threadedly connected with the nut block, a power generation assembly is further arranged in the valve body, a driving assembly for driving the movement of the valve rod is arranged on the outer portion of the valve body, the valve body control system controls and manages the power generation assembly, the driving assembly and the magnet ring, and can further dynamically adjust the sealing force.

[0006] In one embodiment, the power generation assembly comprises a generator fixedly connected in the valve body and an impeller fixedly connected to the driving end of the generator, an installation cavity is arranged in the valve body, an energy storage battery, a controller and a rectifier are arranged in the installation cavity, and the generator is electrically connected with the energy storage battery through the controller.

[0007] In one of the embodiments, the driving assembly comprises a fixing frame fixedly connected to the outside of the valve body, a driving motor fixedly connected to the outside of the fixing frame, and a hand wheel fixedly connected to the outside of the valve rod, the output end of the driving motor is fixedly connected with a rotating rod, the outside of the rotating rod is fixedly connected with a gear, and the outside of the limiting rod is provided with a plurality of gear slots.

[0008] In one of the embodiments, the valve body control system comprises an energy management module, a dynamic sealing control module, a driving adjustment module, an intelligent diagnosis module, and a central control unit.

[0009] In one of the embodiments, the energy management module realizes the collection, energy storage, and supply-demand balance control of the electric energy based on the unstable electric energy output by the generator in the valve body.

[0010] The electric energy collection efficiency formula is as follows:

[0011] ;

[0012] Wherein: is the generator electric energy collection efficiency; is the generator output power, which is determined by the impeller rotating speed and the medium flow , that is is the generator power coefficient; is the electric energy transmission loss power, which includes the wire resistance loss , is the transmission current, is the wire resistance, and the rectifier loss; is the generator input mechanical power, which is provided by the medium kinetic energy;

[0013] The energy storage battery charging and discharging control formula is as follows:

[0014] ;

[0015] Wherein: is the battery remaining power at ; is the initial power; is the charging efficiency, is the discharging efficiency; is the system total load power at ; is the battery rated capacity;

[0016] The central control unit collects , and in real time, starts the charging mode when and , and starts the discharging mode when And when the battery discharge is less than 80%, And if the battery discharge is less than 80% for less than 2 hours, automatically switch to energy saving mode.

[0017] In one embodiment, the dynamic sealing control module dynamically optimizes the sealing pressure between the valve block and the sealing seat by regulating the electromagnetic force of the magnet ring based on the medium working condition and the sealing gap, to achieve on-demand sealing.

[0018] The sealing gap calculation model is as follows:

[0019] ;

[0020] Wherein: is the actual sealing gap between the valve block and the sealing seat at time t; is the initial sealing gap at normal temperature and pressure; is the gap change amount caused by medium pressure, , is the pressure deformation coefficient, which is ; is the real-time medium pressure, is the standard atmospheric pressure; is the gap change amount caused by medium temperature, , is the thermal expansion coefficient of the valve body material; is the difference between the real-time temperature and the normal temperature; is the sealing surface diameter;

[0021] The electromagnetic sealing force regulation formula is:

[0022] ;

[0023] Wherein: is the electromagnetic force required to be output by the magnet ring at time t; is the minimum force to meet the sealing requirement, , is the sealing surface area; 1.2 is the safety factor; is the force to compensate the sealing gap, , is the electromagnetic force compensation coefficient;

[0024] The relationship between the electromagnetic force and the coil current is: ;

[0025] The target current is derived as ;

[0026] ;

[0027] Wherein, is the vacuum permeability, take ; is the number of turns of the coil.

[0028] In one embodiment, the drive adjustment module controls the output speed and torque of the drive motor based on the valve body switching instruction and the real-time load;

[0029] And the drive motor load torque is calculated as follows:

[0030] ;

[0031] Wherein: is the total load torque of the motor at time t; is the resistance torque corresponding to the sealing force, r is the radius of the valve stem, unit: m; f is the friction coefficient between the valve block and the sealing seat, take 0.15~0.2, is the medium flow resistance torque, , is the flow resistance coefficient; Q(t) is the real-time medium flow); is the friction torque of the valve stem and the guide structure, μ is the friction coefficient of the valve stem; is the axial force on the valve stem;

[0032] Motor speed adjustment formula:

[0033] ;

[0034] Wherein: is the target speed of the motor at time t; is the rated speed of the motor; is the rated torque of the motor; is the working condition correction coefficient, , is the allowable maximum sealing gap, take 0.1mm; range 0.7~1.0;

[0035] The central control unit collects , substitute formula , control the speed of the drive motor through PWM signal; At the same time, combined with the hand wheel signal, when the hand wheel is detected to rotate, the motor power is automatically cut off, and the manual mode is switched to.

[0036] In one embodiment, the intelligent diagnosis module realizes real-time diagnosis and residual life prediction of sealing failure, power generation component failure, drive motor abnormality and other faults by analyzing sensor data and equipment operation parameters;

[0037] The failure warning index is calculated as follows:

[0038] ;

[0039] wherein: is a seal failure early warning index; , , is a weight coefficient; is a maximum output electromagnetic force of a magnet ring; is a real-time leakage pressure difference; is a maximum allowable leakage pressure difference;

[0040] Power generation assembly health degree evaluation formula:

[0041] ;

[0042] wherein: is a power generation assembly health degree; is an initial collection efficiency of a generator; is a decay coefficient;

[0043] Driving motor remaining life prediction formula:

[0044] ;

[0045] wherein: is a motor remaining life; is a motor design life; is a loss coefficient;

[0046] The central control unit calculates every 10s , , When a warning threshold is triggered, a fault information is sent through an indicator light and a remote communication module; meanwhile, historical data are stored, a device health record is established, and a predictive maintenance plan is generated.

[0047] In one of the embodiments, the central control unit integrates data collection, formula operation, module cooperative control and external communication functions.

[0048] The beneficial effects of the present application are:

[0049] Compared with the prior art, in the application, the sealing seat cooperates with the valve block to form a sealing structure, and the opening and closing of the flow channel are realized by the lifting of the valve block. The magnet ring at the bottom of the valve block enhances the sealing effect by electromagnetic force. When the valve block is lowered and attached to the sealing seat, the magnetic force generated by the magnet ring makes the valve block and the sealing seat tightly adsorbed, filling the tiny gap. Compared with the traditional sealing method which simply relies on mechanical pressure, the sealing reliability is greatly improved, the fluid leakage is effectively prevented, and the working conditions with high pressure and high sealing requirements are adapted. The power generation assembly in the valve body can generate power independently to provide power for the driving assembly and other electrical components, reducing the dependence on external power supply, and adapting to scenes such as field and remote areas where power supply is inconvenient. The external driving assembly provides sufficient power for the valve rod movement, taking into account the convenience and stability of electric drive, solving the problems of poor sealing effect of traditional stop valves, dependence on external power supply, and easy deviation of valve rod, and the valve body control system controls and manages the power generation assembly, the driving assembly and the magnet ring. In addition, dynamic adjustment of sealing force can also be realized.

[0050] Compared with the prior art, in the application, in the embodiment, the energy management module breaks the dependence on external power supply, and through efficient electric energy collection and intelligent energy storage regulation, it ensures stable operation in the scene without external power supply, reduces the frequency of battery replacement and maintenance cost, and has environmental protection benefits. The dynamic sealing control module solves the problem of fixed sealing force in traditional sealing, accurately controls the sealing gap and electromagnetic force, realizes "on-demand sealing", greatly improves the sealing reliability, eliminates leakage hazards, reduces the wear of sealing parts, and prolongs the service life. The driving adjustment module realizes fine driving control, accurately adapts to the motor load, realizes stable and efficient opening and closing of the valve body, reduces energy consumption, relieves the impact on the parts, prolongs the service life of the driving assembly, and supports safe switching between manual and automatic modes. The intelligent diagnosis module builds a multi-dimensional fault diagnosis and life prediction system, provides early warning of faults, accurately evaluates the health status of the equipment, helps to realize predictive maintenance, shortens downtime, and reduces fault losses. The central control unit as the core hub ensures efficient cooperation of each module, realizes remote management and data interaction through various communication interfaces, and adapts to the structural characteristics of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a structural schematic diagram of the application;

[0052] Figure 2 is a structural schematic diagram of the valve body in the application;

[0053] Figure 3 is a cross-sectional structural schematic diagram of the valve body in the application;

[0054] Figure 4 is a structural schematic diagram of the valve rod in the application;

[0055] Figure 5 is a structural schematic diagram of the generator in the application;

[0056] Figure 6 is Figure 3 Enlarged structural schematic view of A area in figure.

[0057] In the figure, marked as: 1, valve body; 2, through hole; 3, sealing seat; 4, valve block; 5, magnet ring; 6, valve stem; 7, guide rod; 8, guide hole; 9, hand wheel; 10, nut block; 11, fixed frame; 12, limiting cylinder; 13, limiting rod; 14, gear slot; 15, mounting frame; 16, rotating rod; 17, gear; 18, driving motor; 19, generator; 20, impeller; 21, mounting cavity. DETAILED DESCRIPTION

[0058] In the description of the present application, it should be noted that the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0059] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] The following will be described in detail with reference to the accompanying Figures 1-6 Further description of the present application.

[0061] In order to solve the problems in the background art, the present application proposes the following technical scheme: a self-powered electromagnetic force static sealing electric stop valve, comprising a valve body 1, a through hole 2 is arranged in the valve body 1, a sealing seat 3 is fixedly connected in the through hole 2, a valve stem 6 is slidably connected in the valve stem 6, the bottom of the valve stem 6 is fixedly connected with a valve block 4, characterized in that the bottom of the valve block 4 is fixedly connected with a magnet ring 5, the outer part of the valve stem 6 is provided with external threads, the top of the valve seat is fixedly connected with a limiting cylinder 12, the limiting cylinder 12 is slidably connected with a limiting rod 13, the top of the limiting rod 13 is fixedly connected with a fixed frame 11, the fixed frame 11 is fixedly connected with a nut block 10, the valve stem 6 is threadedly connected with the nut block 10, the valve body 1 is further provided with a power generation assembly, the outer part of the valve body 1 is provided with a driving assembly for driving the valve stem 6 to move, in addition, the top of the valve block 4 is fixedly connected with a guide rod 7, the valve body 1 is provided with a guide hole 8, and the guide rod 7 is slidably connected in the guide hole 8.

[0062] The sealing seat 3 cooperates with the valve block 4 to form a sealing structure, and the opening and closing of the flow passage are realized by the lifting of the valve block 4. The magnet ring 5 at the bottom of the valve block 4 uses electromagnetic force to enhance the sealing effect. When the valve block 4 is lowered and attached to the sealing seat 3, the magnetic force generated by the magnet ring 5 makes the valve block 4 and the sealing seat 3 tightly adsorbed, filling the small gap. Compared with the traditional sealing method which simply relies on mechanical pressure, the sealing reliability is greatly improved, effectively preventing fluid leakage, and adapting to the working conditions of high pressure and high sealing requirements.

[0063] The outer thread of the valve rod 6 is threadedly connected with the nut block 10, forming a screw transmission structure, which converts the power of the driving assembly into the linear lifting motion of the valve rod 6, realizing the precise opening and closing of the valve block 4. The sliding cooperation of the limiting cylinder 12 and the limiting rod 13 provides stable guidance for the fixed frame 11 and the nut block 10, preventing the valve rod 6 from rotating circumferentially during lifting, ensuring that the valve block 4 is always accurately aligned with the sealing seat 3, and avoiding affecting the sealing effect due to deviation.

[0064] The power generation assembly in the valve body 1 can generate electricity independently, providing power for the driving assembly and other electrical components, reducing dependence on external power supply, and adapting to scenes such as field and remote areas where power supply is inconvenient; the external driving assembly provides sufficient power for the movement of the valve rod 6, taking into account the convenience and stability of electric drive, solving the problems of poor sealing effect of traditional stop valves, dependence on external power supply, and easy deviation of the valve rod 6.

[0065] In this embodiment, the power generation assembly includes a generator 19 fixedly connected in the valve body 1 and an impeller 20 fixedly connected at the driving end of the generator 19. The valve body 1 is provided with a mounting cavity 21, and the mounting cavity 21 is provided with an energy storage battery, a controller and a rectifier. The generator 19 is electrically connected with the energy storage battery through the controller.

[0066] The impeller 20 of the power generation assembly is arranged in the fluid passage of the valve body 1. When the fluid passes through the valve body 1, it will push the impeller 20 to rotate, and then drive the driving end of the generator 19 to rotate to generate electricity, without additional energy consumption, realizing the recycling of energy and conforming to the concept of energy saving and environmental protection. Compared with the traditional mode of completely relying on external power supply, this self-generating power generation structure can continuously generate electricity during the flow of fluid, especially suitable for scenes of long-term fluid transportation, greatly reducing the operating cost.

[0067] The energy storage battery in the installation cavity 21 is used to store the electric energy generated by the generator 19, so as to ensure that stable electric power can be provided for the driving assembly and other components when the fluid flow is small, the electric power generated is insufficient, or the fluid is temporarily stopped from being conveyed, to guarantee the normal operation of the stop valve and avoid the stop valve from being unable to be opened or closed due to power failure. The rectifier can convert the alternating current generated by the generator 19 into direct current, to adapt to the power consumption demand of the energy storage battery and the controller. The controller is responsible for adjusting the generation, storage and power supply process. When the energy storage battery is fully charged, the controller controls the generator 19 to stop charging the battery, to prevent the equipment from being damaged due to overcharging. When the electric quantity is insufficient, the controller automatically starts power supply, to realize intelligent management and control of electric power.

[0068] The entire power generation assembly is integrated in the valve body 1, so that the structure is compact and does not occupy additional space, and frequent maintenance is not required, to improve the applicability and reliability of the stop valve and solve the problems of the traditional stop valve, such as dependence on external power supply, high operation cost and easy failure due to power failure.

[0069] The driving assembly comprises a fixing frame 11 fixedly connected outside the valve body 1, a driving motor 18 fixedly connected outside the fixing frame 11, and a hand wheel 9 fixedly connected outside the valve rod 6. An output end of the driving motor 18 is fixedly connected with a rotating rod 16. The rotating rod 16 is fixedly connected with a gear 17 outside the rotating rod 16. A plurality of groups of tooth grooves 14 are arranged outside the limiting rod 13.

[0070] In this embodiment, the fixing frame 11 of the driving assembly provides stable mounting support for the driving motor 18, so as to ensure that the motor will not be deviated due to vibration during operation, to guarantee stable transmission. The driving motor 18 serves as a main power source. The rotating rod 16 drives the gear 17 to rotate. The gear 17 is engaged with the tooth grooves 14 outside the limiting rod 13. The rotating power is converted into linear motion of the limiting rod 13. Then the limiting rod 13 drives the nut block 10 to move through the fixing frame 11. The valve rod 6 is driven to ascend or descend through the cooperation between the nut block 10 and the valve rod 6, to realize electric opening and closing of the valve block 4. This electric driving mode is convenient to operate. The opening and closing of the valve can be realized through remote control or an automatic control system, to adapt to automatic production and unattended scenes and greatly improve the operation efficiency.

[0071] The hand wheel 9 outside the valve rod 6 provides a manual operation backup scheme. When the power generation assembly fails, the energy storage battery is out of power or emergency operation is needed, an operator can directly drive the valve rod 6 to ascend or descend by rotating the hand wheel 9, to ensure that the stop valve can still be normally used under special circumstances and to improve the reliability and safety of the equipment. The engagement transmission between the gear 17 and the tooth grooves 14 has the characteristics of stable transmission ratio and high efficiency, can accurately control the movement distance of the limiting rod 13, and then accurately adjust the ascending or descending height of the valve rod 6, so that the fitting degree of the valve block 4 and the sealing seat 3 is controllable, to ensure the sealing effect and avoid excessive extrusion to cause component wear and tear, to prolong the service life of the stop valve.

[0072] The use method of the embodiment is as follows:

[0073] Check the impeller 20 of the power generation assembly flexible rotation, energy storage battery power, controller, rectifier is normal; view the gear 17 of the drive assembly and the meshing of the tooth groove 14 of the limiting rod 13 is close, no jam, hand wheel 9 rotation smooth.

[0074] When the valve body 1 needs to be opened, the drive motor 18 is started by the control system, the motor drives the rotating rod 16 and the gear 17 to rotate, the gear 17 is engaged with the tooth groove 14 of the limiting rod 13 to drive the limiting rod 13 to rise, the fixed frame 11 drives the nut block 10 to move up, and the valve rod 6 is driven to rise by thread cooperation, the valve block 4 moves up to separate from the sealing seat 3, and the fluid passes through the through hole 2 of the valve body 1; when the valve body 1 needs to be closed, the drive motor 18 is started in reverse, the limiting rod 13 and the nut block 10 are moved down, the valve rod 6 is lowered, the magnet ring 5 at the bottom of the valve block 4 is adsorbed and attached to the sealing seat 3, and sealing is achieved.

[0075] When the electric drive fails, disconnect the power supply of the drive motor 18, and rotate the hand wheel 9 outside the valve rod 6 to drive the valve rod 6 to rise and fall manually, and complete the opening and closing of the valve body 1; keep uniform rotation during operation to avoid excessive force causing component damage.

[0076] Periodically check the power generation assembly, clean the impurities on the surface of the impeller 20, and ensure that the fluid pushes the impeller 20 to rotate smoothly; check the battery power, if it has not been used for a long time, the battery needs to be supplemented with power by the fluid flow driving the generator 19; check the attachment surface of the sealing seat 3 and the valve block 4, if there is wear, repair or replace it in time; lubricate the cooperation between the gear 17, the tooth groove 14 of the drive assembly, and the limiting cylinder 12 and the limiting rod 13 to ensure smooth transmission and sliding, and prolong the service life of the equipment.

[0077] As other embodiments, it also includes a valve body 1 control system, the valve body 1 control system controls and manages the power generation assembly, the drive assembly and the magnet ring 5, and can also realize dynamic adjustment of the sealing force, the valve body 1 control system includes an energy management module, a dynamic sealing control module, a drive adjustment module, an intelligent diagnosis module and a central control unit.

[0078] The energy management module is based on the unstable electric energy output by the generator 19 in the valve body 1 to realize the collection, energy storage and supply-demand balance control of electric energy;

[0079] The electric energy collection efficiency formula is as follows:

[0080] ;

[0081] Wherein: The generator 19 electric energy collection efficiency target is greater than or equal to 85%; The generator 19 output power unit is W, which is determined by the rotating speed of the impeller 20 Unit: r / min and medium flow Unit: m³ / h decision, i.e. Power coefficient of generator 19, calibrated by equipment model, taking 0.02-0.05; Power unit: W, including wire resistance loss Transmission current, Wire resistance and rectifier loss; Mechanical power input of generator 19, unit: W, provided by medium kinetic energy.

[0082] Energy storage battery charging and discharging control formula:

[0083] ;

[0084] Wherein: Battery remaining capacity at the moment, unit: %, control range 20%-95%; Initial electric quantity; Charging efficiency of lithium battery, taking 0.9-0.95, Discharge efficiency, taking 0.9-0.95; Total system load power at the moment, unit: W, including driving motor 18 and other power consumption; Battery rated capacity, unit: Wh.

[0085] Logic control: the central control unit collects , and in real time, starts the charging mode when and , starts the battery discharging supplement when and , and automatically switches to the "energy-saving mode" to turn off unnecessary sensors and reduce the driving motor 18 speed when and last for less than 10 minutes.

[0086] ​​The above technical solutions are explained as follows: through the precise electric energy collection efficiency formula, the output power of the generator 19, the transmission loss and the input mechanical power are monitored in real time, and the electric energy converted from the medium kinetic energy is maximized. At the same time, based on the battery residual capacity calculation formula, the charging and discharging processes are dynamically balanced, the residual capacity of the energy storage battery is strictly controlled in the optimal interval, the influence of overcharging and overdischarging on the battery life is effectively avoided, and the battery use cycle is prolonged. In the scene without external power supply, such as remote pipe network, emergency repair site, etc., the module can intelligently allocate energy through the "energy-saving mode", turn off unnecessary sensors, reduce the speed of the driving motor 18, and ensure the continuous operation of the core function of the valve body 1. In addition, the module greatly reduces the frequency of regular replacement of traditional batteries, reduces the on-site maintenance workload of maintenance personnel, reduces the generation of waste batteries, and meets the green and environmentally friendly development concept. Whether in the conventional pipe network operation or in the emergency situation, the valve body 1 can provide stable, efficient and economical energy support.

[0087] The dynamic sealing control module dynamically optimizes the sealing pressure of the valve block 4 and the sealing seat 3 based on the medium working condition pressure, temperature and sealing gap, and realizes "on-demand sealing" by adjusting the electromagnetic force of the magnet ring 5, considering the sealing performance and component life.

[0088] Core formula and principle sealing gap calculation model:

[0089] ;

[0090] Wherein: is the actual sealing gap between the valve block 4 and the sealing seat 3 at time t, unit: mm, and the target control is 0~0.05mm; is the initial sealing gap at normal temperature and pressure, unit: mm, which is determined by the installation accuracy, and is 0.02mm; is the gap change caused by medium pressure, unit: mm, is the pressure deformation coefficient, which is ; is the real-time medium pressure, is the standard atmospheric pressure; is the gap change caused by medium temperature, unit: mm, is the thermal expansion coefficient of the valve body 1 material, which is ; is the difference between the real-time temperature and the normal temperature; is the sealing surface diameter, unit: mm.

[0091] Electromagnetic sealing force control formula:

[0092] ;

[0093] Wherein: The electromagnetic force required by the magnet ring 5 at time t is unit: N; The minimum force required to meet the sealing requirement is The sealing surface area is unit: 1.2 is the safety factor; The force compensating the sealing gap is The electromagnetic force compensation coefficient is calibrated by the magnet ring 5 parameters, and is taken as Further, the relationship between the electromagnetic force and the coil current is: The target current can be derived as

[0094] ;

[0095] The vacuum permeability is taken as ; The number of turns of the coil is

[0096] Logical control: real-time data acquisition through pressure sensor , temperature sensor , formula calculation and , central control unit outputs current signal to magnet ring 5 coil, dynamically adjusts electromagnetic force, and ensures always match the working condition requirements.

[0097] The above technical solutions are explained as follows: with the help of the sealing gap calculation model, the influence of medium pressure and temperature change on the sealing gap is comprehensively considered, the real-time sealing gap value is accurately captured, and it is stably controlled in the ideal range of 0-0.05mm, thereby reducing the risk of sealing failure from the root. Based on the electromagnetic sealing force regulation formula and the target current formula, the module can dynamically adjust the electromagnetic force of the magnet ring 5 according to the real-time working condition, realizing “sealing on demand”: when the medium pressure rises and the sealing gap increases, the electromagnetic force is automatically increased to ensure that the sealing surface is tightly fitted, and the leakage is controlled below 0.01L / h; when the working condition is stable, the electromagnetic force is reasonably reduced to avoid excessive extrusion and wear of the sealing surface. This dynamic adjustment method not only improves the sealing reliability of the valve body 1 compared with traditional products, effectively eliminates the safety hazards and resource waste caused by medium leakage, but also greatly reduces the friction loss of the valve block 4 and the sealing seat 3.

[0098] Among them, the driving adjustment module optimizes the output speed and torque of the driving motor 18 based on the valve body 1 opening and closing instructions and real-time load such as medium resistance and sealing force, realizes stable and efficient opening and closing of the valve body 1, and avoids component impact caused by “quick opening and quick closing”.

[0099] Core formula and principle driving motor 18 load torque calculation:

[0100] ;

[0101] Wherein: T(t) is the total load torque of the motor at time t, unit: N·m; Tf is the resistance torque corresponding to the sealing force, r is the radius of the valve stem 6, unit: m; f is the friction coefficient between the valve block 4 and the sealing seat 3, taking 0.15~0.2; Tm is the medium flow resistance torque, K is the flow resistance coefficient, taking N·m / (m³ / h·kPa); Q(t) is the real-time medium flow; Tf is the friction torque of the valve stem 6 and the guide structure, μ is the friction coefficient of the valve stem 6, taking 0.1; F is the axial force borne by the valve stem 6, determined by the drive assembly structure. The motor speed optimization formula is:

[0102]

[0103] Wherein: ω(t) is the target speed of the motor at time t, unit: r / min; ωn is the rated speed of the motor, unit: r / min, taking 1500r / min; Tn is the rated torque of the motor, unit: N·m, calibrated by the motor model; K is the working condition correction coefficient, δ is the allowable maximum sealing gap, taking 0.1mm; The range is 0.7~1.0, the larger the gap, the lower the speed, to avoid the impact of the sealing surface.

[0104] Logic control: the central control unit collects , substitutes into the formula to calculate , controls the speed of the drive motor 18 through the PWM pulse width modulation signal; at the same time, combined with the hand wheel 9 signal, when the rotation of the hand wheel 9 is detected, the motor power is automatically cut off, and the manual mode is switched to.

[0105] The above technical solutions are explained as follows: the drive adjustment module realizes the smooth and efficient opening and closing of the electric shut-off valve through the fine drive control strategy, significantly improving the running efficiency of the valve body 1 and the service life of the drive assembly. Based on the load torque calculation formula, the sealing force resistance torque, the medium flow resistance torque and the valve stem 6 friction torque are comprehensively considered, the real-time load change of the drive motor 18 is accurately mastered, and the problem of unstable motor operation caused by inaccurate load estimation is avoided. Combined with the motor speed optimization formula, the module dynamically adjusts the motor speed according to the real-time load, so that the motor load matching degree is improved, the "quick opening and quick closing" phenomenon is avoided, the mechanical wear of the valve stem 6, gear 17 and other drive parts is reduced, and the service life of the drive assembly is prolonged.

[0106] The intelligent diagnosis module realizes real-time diagnosis and residual life prediction of sealing failure, power generation assembly failure, and drive motor 18 abnormality by analyzing sensor data and equipment operation parameters.

[0107] Core formula and principle sealing failure early warning index:

[0108]

[0109] Among them: is the sealing failure early warning index range 0~1, trigger early warning; , , is the weight coefficient respectively 0.4, 0.3, 0.3; is the maximum output electromagnetic force of the magnet ring 5 unit: N; is the real-time leakage pressure difference unit: kPa, detected by the leakage sensor; is the maximum allowable leakage pressure difference unit: kPa, taking 5 kPa.

[0110] Power generation assembly health assessment formula:

[0111]

[0112] Among them: is the power generation assembly health range 0~1, prompt replacement; is the initial collection efficiency of the generator 19 unit: %; is the attenuation coefficient taking / h, determined by the aging characteristics of the equipment. Drive motor 18 residual life prediction formula:

[0113]

[0114] Among them: is the motor residual life unit: h; is the motor design life unit: h, taking 10000h; is the loss coefficient taking , determined by the fatigue characteristics of the motor material.

[0115] Logical control: the central control unit calculates , , when the early warning threshold is triggered, sends fault information through the indicator light and remote communication module such as LoRa; at the same time, stores historical data, establishes equipment health archives, and supports predictive maintenance plan generation.

[0116] The above technical solutions are explained as follows: The intelligent diagnosis module provides intelligent support for the operation and maintenance management of the electric cut-off valve with multi-dimensional fault diagnosis and life prediction capability, greatly improving the precision and efficiency of equipment operation and maintenance. Through the sealing failure early warning index, key parameters such as sealing gap, electromagnetic force and leakage pressure difference are fused to build a multi-dimensional sealing failure judgment system. When the early warning index reaches 0.8, an early warning is issued in time to give the maintenance personnel 24 hours to deal with the situation and effectively avoid medium leakage accidents caused by sealing failure. Based on the health degree evaluation formula of the power generation assembly, the module monitors the efficiency decay of the generator 19 in real time, accurately evaluates the health status of the power generation assembly, and prompts replacement when the health degree falls below 0.6 to avoid energy supply interruption caused by sudden failure of the power generation assembly. At the same time, with the help of the motor remaining life prediction formula, the module can scientifically predict the remaining service life of the driving motor 18 and provide data support for the maintenance personnel to develop spare parts procurement and replacement plan, avoiding downtime loss caused by sudden motor damage.

[0117] The central control unit integrates data acquisition (connecting with various sensors, power generation assemblies and driving assemblies), formula operation, module collaborative control and external communication functions. It uses STM32H743 microcontroller and supports real-time operating system (RTOS) to ensure the timeliness of multi-task parallel processing.

[0118] Communication interface: includes RS485, Bluetooth and LoRa modules, supports two-way communication with host computer (such as pipeline monitoring system) and uploads equipment operation data , receives remote control instructions (such as valve body 1 opening and closing, parameter calibration).

[0119] The above technical solutions are explained as follows: The central control unit is the core hub of the entire control system, and with its powerful integration and collaboration capabilities, it provides a guarantee for the efficient operation of each module, and significantly improves the compatibility and intelligent management level of the valve body 1. The unit uses a high-performance STM32H743 microcontroller, which has powerful data processing and computing capabilities, can quickly complete formula calculation, data acquisition and instruction issuance tasks for each module, and ensures the timeliness and stability of multiple modules working in parallel, avoiding control deviation caused by data processing delay. Its integrated RS485, Bluetooth and LoRa communication interfaces enable the valve body 1 to not only interact with on-site host equipment for data exchange, but also access the pipe network monitoring system through remote communication, allowing operation and maintenance personnel to remotely obtain real-time operation parameters of the valve body 1, such as remaining battery capacity, electromagnetic sealing force, device health, etc., and remotely issue control instructions such as valve body 1 opening and closing and parameter calibration, significantly reducing the workload of on-site inspection and improving management efficiency. In addition, the central control unit is deeply adapted to the structural characteristics of the self-powered electromagnetic force static seal electric stop valve, perfectly compatible with the control requirements of components such as power generation components, drive components and magnet rings 5, ensuring that the modules work together to form a force and fully utilize the performance advantages of the entire control system. Whether it is the independent operation of a single valve body 1 or the centralized management of a pipe network system composed of multiple valve bodies 1, the unit can provide a stable and reliable control core to promote the intelligent and networked management of valve body 1 equipment.

[0120] In summary, in this embodiment, the energy management module breaks the dependence on external power supply, ensures stable operation in the absence of external power supply through efficient power harvesting and intelligent energy storage regulation, reduces battery replacement frequency and maintenance cost, and has environmental benefits. The dynamic sealing control module solves the problem of fixed sealing force in traditional sealing, precisely controls the sealing gap and electromagnetic force, realizes "on-demand sealing", significantly improves sealing reliability, eliminates leakage risks, reduces sealing component wear and tear, and prolongs service life. The drive adjustment module precisely adapts to motor load through fine driving control, realizes smooth and efficient opening and closing of the valve body 1, reduces energy consumption, relieves component impact, prolongs the service life of the drive assembly, and also supports safe switching between manual and automatic modes. The intelligent diagnosis module builds a multi-dimensional fault diagnosis and life prediction system, provides early warning of faults, accurately assesses the health status of the equipment, helps to achieve predictive maintenance, shortens downtime, and reduces fault losses. The central control unit serves as the core hub, ensuring efficient collaboration of each module, and enabling remote management and data exchange through various communication interfaces, adapting to the structural characteristics of the valve body 1.

[0121] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the mechanical parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here. The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0122] Although embodiments of the present application have been shown and described, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-generating electromagnetic static sealing electric shut-off valve, comprising a valve body (1) and a control system, wherein the valve body (1) has a through hole (2), a sealing seat (3) is fixedly connected in the through hole (2), a valve stem (6) is slidably connected in the valve stem (6), and a valve block (4) is fixedly connected to the bottom of the valve stem (6), characterized in that, The bottom of the valve block (4) is fixedly connected with a magnet ring (5), the outer part of the valve stem (6) is provided with external threads, the top of the valve seat is fixedly connected with a limiting cylinder (12), the limiting cylinder (12) is slidably connected with a limiting rod (13), the top of the limiting rod (13) is fixedly connected with a fixing frame (11), the fixing frame (11) is fixedly connected with a nut block (10), the valve stem (6) is threadedly connected with the nut block (10), the valve body (1) is further provided with a power generation assembly, the outer part of the valve body (1) is provided with a driving assembly for driving the valve stem (6) to move, and the valve body (1) control system controls and manages the power generation assembly, the driving assembly and the magnet ring (5), and can further realize dynamic adjustment of a sealing force.

2. A self-generating electromagnetic force static seal electric stop valve according to claim 1, characterized in that, The power generation assembly comprises a generator (19) fixedly connected in the valve body (1) and an impeller (20) fixedly connected at a driving end of the generator (19), the valve body (1) is provided with a mounting cavity (21), the mounting cavity (21) is provided with an energy storage battery, a controller and a rectifier, and the generator (19) is electrically connected with the energy storage battery through the controller.

3. A self-generating electromagnetic force static seal electric stop valve according to claim 2, characterized in that, The driving assembly comprises the fixing frame (11) fixedly connected to the outer part of the valve body (1), a driving motor (18) fixedly connected to the outer part of the fixing frame (11) and a hand wheel (9) fixedly connected to the outer part of the valve stem (6), the output end of the driving motor (18) is fixedly connected with a rotating rod (16), the outer part of the rotating rod (16) is fixedly connected with a gear (17), and the outer part of the limiting rod (13) is provided with a plurality of gear grooves (14).

4. A self-generating electromagnetic force static seal electric stop valve according to claim 3, characterized in that, The valve body (1) control system comprises an energy source management module, a dynamic sealing control module, a driving adjustment module, an intelligent diagnosis module and a central control unit.

5. A self-generating electromagnetic force static seal electric stop valve according to claim 4, characterized in that, The energy source management module realizes collection, energy storage and supply-demand balance control of electric energy based on unstable electric energy output by the generator (19) in the valve body (1). The electric energy collection efficiency formula is as follows: ； Where: is the electrical energy collection efficiency of the generator (19); is the output power of the generator (19) from the impeller (20) rotational speed and the medium flow rate determines that is the power coefficient of the generator (19); is the power loss of the electrical energy transmission, including the wire resistance loss , is the transmission current, is the wire resistance, and the rectifier loss; is the input mechanical power of the generator (19) provided by the kinetic energy of the medium; The energy storage battery charging and discharging control formula is as follows: ； wherein: is the battery remaining power at the moment; is the initial power; is the charging efficiency, is the discharging efficiency; is the total system load power at the moment; is the battery rated capacity; The central control unit collects in real time , and , the charging mode is started when and , the battery discharge supplement is started when and , and the energy-saving mode is automatically switched to when and last for less than.

6. A self-generating electromagnetic force static seal electric stop valve according to claim 5, characterized in that, The dynamic sealing control module dynamically optimizes the sealing pressure of the valve block (4) and the sealing seat (3) by regulating the electromagnetic force of the magnet ring (5) based on the medium working condition and the sealing gap, so as to realize on-demand sealing. The sealing gap calculation model is as follows: ； Wherein: is the actual sealing gap between the valve block (4) and the sealing seat (3) at time t; is the initial sealing gap at normal temperature and pressure; is the gap change amount caused by the medium pressure, , is the pressure deformation coefficient, taken as ; is the real-time medium pressure, is the standard atmospheric pressure; is the gap change amount caused by the medium temperature, , is the thermal expansion coefficient of the valve body (1) material; is the difference between the real-time temperature and the normal temperature; is the sealing surface diameter; The electromagnetic sealing force regulation formula is as follows: ； Wherein: is the electromagnetic force that the magnet ring (5) needs to output at time t; is the minimum force to meet the sealing requirement, , is the sealing surface area; 1.2 is the safety factor; is the force to compensate the sealing gap, , is the electromagnetic force compensation coefficient; The relationship between the electromagnetic force and the coil current is: ; deriving the target current ; ； wherein is the vacuum permeability, taken as ; is the number of turns of the coil.

7. A self-generating electromagnetic force static seal electric stop valve according to claim 6, characterized in that, The driving adjustment module controls the output rotating speed and torque of the driving motor (18) based on the valve body (1) opening and closing instructions and real-time load. The driving motor (18) load torque calculation is as follows: ； in: Let t be the total load torque of the motor. This is the resistance torque corresponding to the sealing force. r is the radius of the valve stem (6), in meters; f is the coefficient of friction between the valve block (4) and the sealing seat (3), taken as 0.15~0.

2. Torque is the resistance torque to the flow of the medium. , (where Q(t) is the flow resistance coefficient and Q(t) is the real-time medium flow rate). The frictional torque between the valve stem (6) and the guide structure, μ is the friction coefficient of the valve stem (6); The axial force on the valve stem (6); The motor rotating speed adjustment formula is as follows: ； Wherein: is the motor target speed at time t; is the motor rated speed; is the motor rated torque; is the working condition correction coefficient, , is the allowable maximum sealing gap, taking 0.1mm; range 0.7~1.0; The central control unit collects , substitute formula calculation , through the PWM signal control drive motor (18) speed; at the same time, combined with the hand wheel (9) signal, when detecting the hand wheel (9) rotation, automatically cut off the motor power, switch to manual mode.

8. A self-generating electromagnetic force static seal electric stop valve according to claim 7, characterized in that, The intelligent diagnosis module realizes real-time diagnosis and remaining life prediction of sealing failure, power generation assembly failure and driving motor (18) abnormality by analyzing sensor data and equipment operating parameters. The failure early warning index calculation is as follows: ； in: This is a warning index for seal failure. , , These are the weighting coefficients; The maximum output electromagnetic force of the magnet ring (5); For real-time leakage pressure difference; To the maximum allowable leakage pressure difference; The power generation assembly health degree evaluation formula is as follows: ； wherein: is a power plant health; is an initial acquisition efficiency of the generator (19); is a decay coefficient; The driving motor (18) remaining life prediction formula is as follows: ； wherein: is the remaining life of the motor; is the design life of the motor; is the loss coefficient; The central control unit calculates every 10 s , , When the early warning threshold is triggered, send fault information through the indicator light and the remote communication module; at the same time, store historical data, establish a device health file, and support the generation of a predictive maintenance plan.

9. A self-generating electromagnetic force static seal electric stop valve according to claim 8, characterized in that, The central control unit integrates data collection, formula operation, module collaborative control and external communication functions.

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