CN103075536B - Low-temperature ball valve and control system thereof - Google Patents
Low-temperature ball valve and control system thereof Download PDFInfo
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- CN103075536B CN103075536B CN201310031714.4A CN201310031714A CN103075536B CN 103075536 B CN103075536 B CN 103075536B CN 201310031714 A CN201310031714 A CN 201310031714A CN 103075536 B CN103075536 B CN 103075536B
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Abstract
The invention discloses a low-temperature ball valve, which comprises a valve body, a valve cap, valve seat assemblies, a ball body, a valve rod and a stationary shaft, wherein the valve body and the valve cap are respectively provided with a runner; the valve body and the valve cap are connected by a gasket, a stud and a nut; the ball body is arranged in the valve body; and two sides of the ball body are respectively provided with one valve seat assembly respectively connected with the insides of the valve body and the valve cap. The low-temperature ball valve is further provided with a driving device, wherein the driving device is connected with the upper part of the valve rod by a key, and the lower end of the valve rod is connected with the ball body. According to the low-temperature ball valve disclosed by the invention, a welding line for connecting the valve body and the valve seat adopts a full-automatic welding technology, and the valve body and the valve seat adopt the U-shaped welding line so as to eliminate a leaking point in the welding line for the valve body and the valve seat. The valve sealing surface adopts Stellite hard alloy, the surface is formed by rolling, and the service life of the valve is prolonged. The sealing surface adopts automatic grinding, and the goodness fit of the sealing surface is improved.
Description
Technical field
The present invention relates to machinery valve technical field, particularly a kind of cryogenic ball valve and control system thereof.
Background technique
Along with the throughput of the industries such as oil, petrochemical industry, electric power, metallurgy strengthens, be badly in need of a kind of high-performance, the valve products of high parameter substitutes original old product, guarantee output, increase work efficiency.
As the control valve of Pipeline transport, owing to containing particulate species solid sundries in medium, the reason occurred at first is that valve seal wear resistance is poor, and sealing surface easily damages, and valve body, the not weld penetration of valve seat weld seam, cause welding seam leakage and even perforation.Along with valve gate technology is updated, high performance material and automation equipment occur, cause old product to withdraw from the market gradually competitive ability.
Summary of the invention
Ball valve of the present invention is by rotation hand wheel, and rotation valve rod nut, makes valve rod be elevated and drive flashboard to move linearly along perpendicular media direction, reach the object of opening and closing.This product is mainly used in gas, liquid medium pipeline make opening/closing device, connects or blocks MEDIA FLOW, having flow resistance little, opening and closing the advantages such as laborsaving.The hard seal wear-resistant gate valve of wedge-type of the present invention, be different from traditional gate valve product, at valve seat and ram seal face surface overlaying department too alloy, surface adopts roll forming, adopts Flexible disc, suitable minimizing elasticity ratio, set up lacing wire in flashboard T word groove side, suitably strengthen guiding groove length, reduce the gap between valve body guiding rib and flashboard guiding groove, stem surface adopts roll forming, and adopts surface carburization process.Improve valve working life and sealing.
For solving the problems of the technologies described above, the invention provides a kind of cryogenic ball valve, comprising valve body, valve gap, valve component, spheroid, valve rod and stationary axle.
Described valve body, valve gap respectively have runner, and valve body, valve gap are connected by pad, stud, nut.
Described spheroid is placed in valve body, and two sides of described spheroid are respectively provided with a valve component, and are connected with the inside of described valve body, described valve gap respectively.
Described cryogenic ball valve is provided with drive unit further, and described drive unit is connected by key with described valve rod top, and described valve rod lower end is connected with described spheroid.
Described spheroid top and bottom surface, valve stem contacts position are arc shaped surface, and both sides are respective parallel plane, and described spheroid bottom is connected with stationary axle, radial bearing, plane bearing by cylindrical hole, and is provided with the spring of antistatic in bottom surface.
For solving the problems of the technologies described above, present invention also offers a kind of control system of as above cryogenic ball valve described in any one, comprising: main control module, energy supply control module, power supply, valve position signal module, I/O module, pressure transducer, temperature transducer, display modular, A/D module, valve control module, valve events control circuit, communication module, bluetooth module, wireless module, and, serial port transform USB module.
Described main control module, with described I/O module, communication module, valve control module is connected, and controls described control system for entirety;
Described energy supply control module, is connected with described power supply with described I/O module, for controlling the power supply of described power supply;
Described power supply, is connected with described energy supply control module, for powering for described control system;
Described valve position signal module, is connected with described I/O module, for carrying valve position signal to described I/O module;
Described I/O module, respectively with described valve position signal module, energy supply control module, A/D module, main control module is connected, for the input output of baseband signal information;
Described pressure transducer, is connected with described A/D module, for perception cryogenic ball valve or the pressure of pipeline that is connected with cryogenic ball valve, and by aforementioned pressure Signal transmissions to described A/D module;
Described temperature transducer, is connected with described A/D module, for perception cryogenic ball valve or the temperature of pipeline that is connected with cryogenic ball valve, and by aforementioned temperature Signal transmissions to described A/D module;
Described display modular, is connected with described A/D module, for the temperature and pressure of the pipeline that shows cryogenic ball valve or be connected with cryogenic ball valve;
Described A/D module, respectively with described I/O module, pressure transducer, temperature transducer, display modular is connected; For by pressure transducer, the signal of temperature transducer transmission carries out A/D or D/A conversion; And the information after conversion is communicated with display modular with I/O module;
Described valve control module, is connected with valve events control circuit with described main control module respectively; Instruction manipulation for sending according to described main control module is described sends out control circuit, and sends the signal that described valve events control circuit is passed back back to described governor circuit;
Described valve events control circuit, is connected with described valve control module, for the instruction manipulation valve closing carried according to it, opens, or stops valve;
Described communication module, with described main control module, bluetooth module, wireless module is connected, for self or wireless data communication;
Described bluetooth module, is connected with described communication module, for self communication of described control system;
Described wireless module, is connected with described communication module, for described control system and outside wireless telecommunications;
Described serial port transform USB module, is connected with described communication module, for the mutual conversion of serial data and usb data.
Described pressure transducer input pressure signal; Described temperature transducer input temp signal; Described display modular has vapour-liquid valve state-indicating function; The vapour-liquid valve state of described control system comprises: gas-oil valve reach position instruction, gas-oil valve close put in place instruction, gas-oil valve on the spot/remote status, control system explosion-proof door state.
Described main control module receives from I/O module, the valve position state of the gas-liquid actuator that valve control module is uploaded, state of alarm and test mode; Described main control module accept from control centre open and close, stop three kinds of remote operation orders.Control system can perform open and close at any time according to the order of control centre, stop three kinds of operations.
Described valve opening is operating as:
Valve opening condition: control system receives the valve opening order of control centre, and valve opening location switch is not closed;
Valve opening exports: control system is put valve opening and exported effectively, put close valve export invalid;
Valve opening stops: valve opening location switch closes, or receives new stopping valve or close valve order;
Described pass valve is operating as:
Close valve condition: control system receives the pass valve order at center, pass valve location switch is not closed;
Control system is put and is closed valve and export effectively, put valve opening export invalid;
Close valve location switch to close, or receive and new stop valve or valve opening order;
The described valve that stops is operating as:
Control system put valve opening export invalid, put close valve export invalid.
For solving the problems of the technologies described above, present invention also offers a kind of ball valve, comprising: valve body, valve gap, valve component, spheroid, valve rod, spring, stationary axle, long-neck support and ceiling hold.
Described ball valve is provided with drive unit further.
Described valve body, valve gap respectively have runner; Valve body, valve gap are connected by pad, stud, nut; Spheroid is placed in valve body, two sides of spheroid are respectively equipped with a valve component, and be connected with the inside of valve body, valve gap respectively, drive unit is connected by key with valve rod top, valve rod lower end is connected with spheroid, drive unit rotates and makes valve rod, spheroid is rotated about axis, and realizes the unlatching of 90 °, valve, closes.
Described seat ring external diameter adopts three grades of steps, adopts the combination seal form of fire-protection ring and lip-type packing, back-up ring.
Described valve body and valve gap, between valve body and support, valve body lower end is connected with stationary axle tongue-and-groove, and use little surface of contact between valve body and valve gap, there is small―gap suture outside, increases distortion, prevents medium from leaking outside.
For solving the problems of the technologies described above, present invention also offers a kind of controlling method of as above ball valve described in any one, comprising the following steps:
The first step: the main control module of ball valve control system sends sign on;
Second step: temperature transducer is by the temperature signal that collects respectively by A/D module, and the signal conversion of I/O module and conduction, report main control module by the temperature signal after process;
3rd step: pressure transducer is by the pressure signal that collects respectively by A/D module, and the signal conversion of I/O module and conduction, report main control module by the pressure signal after process;
4th step: main control module carries out rolling average value filtering;
5th step: main control module carries out ROD calculating; Judge whether to transfinite; If so, timer starts; Otherwise by valve control module, main control module detects whether valve state is intermediate state;
6th step: valve state is intermediate state, starts timer, and by alert process task start; Otherwise, detection case door state;
7th step: chamber door state is opened, starts alert process task; Otherwise, time delay one second.
In described controlling method, the pressure needed for control system gathers, temperature, cell voltage, valve position status data; And the main control module of control system needs whether normally to monitor these data, occurs that abnormal conditions terminal needs process accordingly according to different situation.
In described controlling method, control system with usB interface, Bluetooth function, wireless communication function; USB interface is used for carrying out the setting of parameter and the configuration of some constants; Bluetooth function is used for short-range wireless telecommunications, and convenient inspector at ordinary times checks; Wireless communication function is used for the monitor staff's communication with control centre, occurs extremely can reporting control centre, and control centre also can carry out Remote operation by control system of the present invention to cryogenic ball valve valve chamber simultaneously.
In described controlling method, it is control actuator to open that the control of control system exports one, closing valve action; Another is the work controlling power module.
In described controlling method, the signals collecting of control system is set to per second completing and once samples, and comprises pipeline pressure AIN0, control system operating ambient temperature AIN4, cell voltage AIN47 by the analog signals of A/D module inlet opening sampling; The digital switch quantity signal gathered by the inlet opening of I/O module is comprised valve and reaches a signal IN00, and close put in place signal IN01, control system chamber door signal IN02, valve is long-range, local operation signal IN03.
For solving the problems of the technologies described above, present invention also offers the hard seal wear-resistant gate valve of a kind of wedge-type, described gate valve comprises: valve body, valve seat, flashboard, valve rod, valve gap and drive unit.
Described valve body, valve cover material adopt WCB, and described valve sealing face material adopts cemented carbide, and surface scrolls is shaping.
The weld seam that described valve body, valve seat connect adopts Full-automatic welding method; Described valve body, valve seat adopt U-shaped weld seam.
Described valve sealing face adopts Si Taili cemented carbide, and surface adopts roll forming, and its hardness can reach HRC45; Sealing surface adopts automatic grinding.
Described gate valve adopts Flexible disc, and set up lacing wire in flashboard T word groove side, the guiding groove edge of flashboard is fillet type; The corner of its upper seal support, Packing seat, filler pressing sleeve is fillet type; Stem surface adopts roll forming, and adopts surface carburization process.
For solving the problems of the technologies described above, present invention also offers the control system of the hard seal wear-resistant gate valve of a kind of as above wedge-type described in any one, comprising: main control module, energy supply control module, power supply, valve position signal module, I/O module, pressure transducer, temperature transducer, display modular, A/D module, valve control module, valve events control circuit, communication module, wireless module, and, serial port transform USB module.
Described main control module, with described I/O module, communication module, valve control module is connected, and controls described control system for entirety;
Described energy supply control module, is connected with described power supply with described I/O module, for controlling the power supply of described power supply;
Described power supply, is connected with described energy supply control module, for powering for described control system;
Described valve position signal module, is connected with described I/O module, for carrying valve position signal to described I/O module;
Described I/O module, respectively with described valve position signal module, energy supply control module, A/D module, main control module is connected, for the input output of baseband signal information;
Described pressure transducer, is connected with described A/D module, for perception cryogenic ball valve or the pressure of pipeline that is connected with cryogenic ball valve, and by aforementioned pressure Signal transmissions to described A/D module;
Described temperature transducer, is connected with described A/D module, for perception cryogenic ball valve or the temperature of pipeline that is connected with cryogenic ball valve, and by aforementioned temperature Signal transmissions to described A/D module;
Described display modular, is connected with described A/D module, for the temperature and pressure of the pipeline that shows cryogenic ball valve or be connected with cryogenic ball valve;
Described A/D module, respectively with described I/O module, pressure transducer, temperature transducer, display modular is connected; For by pressure transducer, the signal of temperature transducer transmission carries out A/D or D/A conversion; And the information after conversion is communicated with display modular with I/O module;
Described valve control module, is connected with valve events control circuit with described main control module respectively; Instruction manipulation for sending according to described main control module is described sends out control circuit, and sends the signal that described valve events control circuit is passed back back to described governor circuit;
Described valve events control circuit, is connected with described valve control module, for the instruction manipulation valve closing carried according to it, opens, or stops valve;
Described communication module, with described main control module, wireless module is connected, for self or wireless data communication;
Described wireless module, is connected with described communication module, for described control system and outside wireless telecommunications;
Described serial port transform USB module, is connected with described communication module, for the mutual conversion of serial data and usb data.
Described pressure transducer input pressure signal; Described temperature transducer input temp signal; Described display modular has vapour-liquid valve state-indicating function; The vapour-liquid valve state of described control system comprises: gas-oil valve reach position instruction, gas-oil valve close put in place instruction, gas-oil valve on the spot/remote status, control system explosion-proof door state.
Described main control module receives from I/O module, the valve position state of the gas-liquid actuator that valve control module is uploaded, state of alarm and test mode; Described main control module accept from control centre open and close, stop three kinds of remote operation orders.Control system can perform open and close at any time according to the order of control centre, stop three kinds of operations.
Described valve opening is operating as:
Valve opening condition: control system receives the valve opening order of control centre, and valve opening location switch is not closed;
Valve opening exports: control system is put valve opening and exported effectively, put close valve export invalid;
Valve opening stops: valve opening location switch closes, or receives new stopping valve or close valve order;
Described pass valve is operating as:
Close valve condition: control system receives the pass valve order at center, pass valve location switch is not closed;
Control system is put and is closed valve and export effectively, put valve opening export invalid;
Close valve location switch to close, or receive and new stop valve or valve opening order;
The described valve that stops is operating as:
Control system put valve opening export invalid, put close valve export invalid.
For solving the problems of the technologies described above, present invention also offers a kind of wear-resistant sluice valve controlling method based on computer system, comprising the following steps:
The first step: the main control module of gate valve control system sends sign on;
Second step: temperature transducer is by the temperature signal that collects respectively by A/D module, and the signal conversion of I/O module and conduction, report main control module by the temperature signal after process;
3rd step: pressure transducer is by the pressure signal that collects respectively by A/D module, and the signal conversion of I/O module and conduction, report main control module by the pressure signal after process;
4th step: main control module carries out rolling average value filtering;
5th step: main control module carries out ROD calculating; Judge whether to transfinite; If so, timer starts; Otherwise by valve control module, main control module detects whether valve state is intermediate state;
6th step: valve state is intermediate state, starts timer, and by alert process task start; Otherwise, detection case door state;
7th step: chamber door state is opened, starts alert process task; Otherwise, time delay one second.
Described based in the wear-resistant sluice valve controlling method of computer system, the filtering method of pressure signal and judge that the step of leaking is: be the window of N at data length, asks for arithmetic mean value when image data meets length of window according to following formula.
Adopt at this quantity of information filtering that just utilizes new data to provide after new data and by former data cover, finally obtain the arithmetic mean value of the N number of data in current buffer again.Upgrade filter result according to new sampled value, namely survey data newly gathers one and just abandons the data gathered before N time, measures and once just calculates a mean value, greatly accelerate the ability of data processing.N can arrange change.
Described based in the wear-resistant sluice valve controlling method of computer system, the pressure data obtained by rolling average value filtering, is needed and the front pressure comparison calculated of once sampling calculates pressure drop speed (RoD) per second.Consider the impact of temperature on pipeline pressure, by Clapyron Equation:
p·v＝n·R·T
P: pressure, v: rock gas volume, n: amount of substance, T: temperature, R: constant 8.31441
If when not occurring to leak, ROD is 0.
Described based in the wear-resistant sluice valve controlling method of computer system, when occurring to leak, Rod meets following formula relation, and wherein, △ t is sampling interval duration;
Described based in the wear-resistant sluice valve controlling method of computer system, when having pipeline or cryogenic ball valve to leak, the pressure in pipeline or cryogenic ball valve will decline; When control system is the ROD calculated and the parameter comparison that presets, exceed this parameter and then think the pressure drop excessive velocities of cryogenic ball valve or pipeline, then passs valve is carried out to the block valve of main line and operate; Control system is also monitored the normal operating pressure of pipeline, when occurring that force value exceeds or lower than the abnormal conditions of this scope, throttle down.
For solving the problems of the technologies described above, present invention also offers a kind of as above described in any one based on the wear-resistant sluice valve used in the wear-resistant sluice valve controlling method of computer system, described wear-resistant sluice valve comprises: valve body, valve seat, flashboard, valve rod, valve gap, support and drive unit.
The weld seam that described valve body, valve seat connect adopts Full-automatic welding; Valve body, valve seat adopt U-shaped weld seam.
Described valve sealing face adopts Si Taili cemented carbide, and surface adopts roll forming; Sealing surface adopts automatic grinding.
Described wear-resistant sluice valve adopts Flexible disc, sets up lacing wire, in the guiding groove edge of flashboard, be designed to fillet, and strengthen guiding groove length in flashboard T word groove side.
The corner of the upper seal support of described wear-resistant sluice valve, Packing seat, filler pressing sleeve is designed to fillet, endoporus extra clearance, and cylindrical reduces gap; Stem surface adopts roll forming, and adopts surface carburization process.
Ball valve of the present invention, the weld seam that valve body, valve seat connect adopts full automatic welding connection technology, and valve body, valve seat adopt U-shaped weld seam, solves leak source in valve body, valve seat weld seam.Valve sealing face adopts Si Taili cemented carbide, and surface adopts roll forming, extends the working life of valve.Sealing surface adopts automatic grinding, improves the Percent of contact area of sealing surface.Adopt Flexible disc, suitably reduce elasticity ratio, valve seal is reliable.Set up lacing wire in flashboard T word groove side, prevent flashboard in operating mode stressed too quickly, T word groove is torn, and easily causes the accident.In the guiding groove edge of flashboard, be designed to fillet, and suitably strengthen guiding groove length, prevent valve to be stuck in opening and closing process.The corner of upper seal support, Packing seat, filler pressing sleeve is designed to fillet, and the suitable extra clearance of endoporus, cylindrical suitably reduces gap.Stem surface adopts roll forming, and adopts surface carburization process, improves stem surface hardness, prevents stem surface from pulling, plucking, reduces mechanical wear, decreases the operational torque of valve.
Accompanying drawing explanation
Fig. 1 is the valve control system structural drawing of the embodiment of the present invention;
Fig. 2 is the valve control system functional diagram of the embodiment of the present invention;
Fig. 3 is valve control method data sampling and the process chart of the embodiment of the present invention;
Fig. 4 is AD7859 circuit connection diagram in the A/D module of the embodiment of the present invention;
Fig. 5 is the RS-485 serial line interface long splice composition of the embodiment of the present invention.
Embodiment
Cryogenic ball valve of the present invention, comprises valve body, valve gap, valve component, spheroid, valve rod, spring, stationary axle, long-neck support, ceiling hold, drive unit etc.Valve body, valve gap respectively have runner, and valve body, valve gap are connected by pad, stud, nut.Spheroid is placed in valve body, two sides of spheroid are respectively equipped with a valve component, and be connected with the inside of valve body, valve gap respectively, drive unit is connected by key with valve rod top, valve rod lower end is connected with spheroid, drive unit rotates and makes valve rod, spheroid is rotated about axis, and realizes the unlatching of 90 °, valve, closes.
Spheroid top and bottom surface, valve stem contacts position adopt arc shaped surface, and both sides are respective parallel plane, and spheroid bottom is connected in by cylindrical hole and stationary axle, radial bearing, plane bearing the spring that bottom surface is provided with antistatic mutually.
Sealing uses PCTFE material, the low temperature of ability-196 DEG C, and sealing surface and spheroid contact position adopt arc contact surface.Seat ring external diameter adopts three grades of steps, adopts the combination seal form of fire-protection ring and lip-type packing, back-up ring.
Valve body and valve gap, between valve body and support, valve body lower end is connected with stationary axle tongue-and-groove, and use little surface of contact between valve body and valve gap, there is small―gap suture outside, increases distortion, prevents medium from leaking outside.
Under preventing worst cold case, the inefficacy of stem packing sealing, cryogenic ball valve adopts long-neck support Design, and increases anti-thermal baffle, and filler is placed on the upper end of long-neck support, effectively prevents temperature transmission.
Stem material adopts F316, and adopt solution treatment, cryogenic treatment, and surface carburization process, to improve surface hardness.
For reducing the operation moment of torsion of valve, at valve rod lower end cylindrical, stationary axle and spheroid lower end are provided with radial bearing.
The support be connected with drive unit adopts 90 ° of spacing designs, can meet and use Pneumatic actuator or other drive units not to have spacing needs.
Cryogenic ball valve of the present invention, by valve body, valve gap, valve component, spheroid, valve rod, spring, stationary axle, long-neck support, ceiling hold, drive unit etc.Valve body, valve gap respectively have runner, valve body, valve gap are connected by pad, bolt, nut, spheroid is placed in valve body, the both sides of spheroid are respectively equipped with a valve seat, and be connected with the inside of valve body, valve gap respectively, drive unit is connected by key with valve rod top, and stem lower portion is connected by both sides plane contact with spheroid.Spheroid bottom is connected with stationary axle, radial bearing, plane bearing by cylindrical hole.Sealing surface of seat and spheroid contact position adopt arc contact surface.Seat ring external diameter adopts three grades of steps, adopts the combination seal form of fire-protection ring and lip-type packing, back-up ring.
Valve body and valve gap, between valve body and long-neck support, valve body lower end is connected with stationary axle tongue-and-groove, the little surface of contact of valve body and valve cover chamber, and there is small―gap suture outside, increases distortion, prevents medium from leaking outside.Under preventing ultralow-temperature operation conditions, the inefficacy of stem packing sealing, ultra-low temperature ball valve adopts long-neck support Design, and adds thermal baffle, and filler is placed on the upper end of long-neck support, effectively prevents temperature transmission.The internal materials such as valve rod adopt F316, and adopt solution treatment, cryogenic treatment, and surface carburization process, to improve surface hardness.For reducing the operation moment of torsion of valve, at valve rod lower end external diameter, stationary axle and spheroid lower end are provided with radial bearing.The support be connected with drive unit in addition adopts 90 ° of spacing designs, can meet client and use Pneumatic actuator or other drive unit not to have spacing needs.
When carrying out valve opening, closing operation, drive unit rotation valve rod, valve rod drives spheroid to rotate, and realizes the unlatching of 90 °, valve, closes.
Valve body, valve cover material adopt F316, and valve seat adopts PCTFE material, the low temperature of ability-196 DEG C, and originally adopt the low temperature of PTFE material not ability-196 DEG C, and during low temperature, easily produce cold flow, low temperature brittleness.Spheroid, stem material now adopt F316, adopt solution treatment, cryogenic treatment, surface carburization process, improve surface hardness.
The hard seal wear-resistant gate valve of wedge-type of the present invention, valve body, valve cover material adopt WCB, and valve sealing face material adopts cemented carbide, and surface scrolls is shaping, wear-resisting, and original valve sealing face material adopts 13Cr, not wear-resisting, easily abrade.
The hard seal wear-resistant gate valve of wedge-type of the present invention, is made up of parts such as valve body, valve seat, flashboard, valve rod, valve gap, support, drive units:
One, the weld seam that this product valve body, valve seat connect adopts full automatic welding connection technology.Valve body, valve seat adopt U-shaped weld seam, solve leak source in valve body, valve seat weld seam, decrease the impact that human weld's butt welded seam quality causes, improve the up-to-standard rate of weld seam pressure testing, relatively saved valve manufacture cost.
Its two, valve sealing face employing Si Taili cemented carbide, surface adopts roll forming, extends the working life of valve.Namely on flashboard, sealing surface of seat, Si Taili cemented carbide is piled.Washing away of this kind of material against oxidative, resisting sulfide, acidproof, high temperature resistant, wear-resisting, resistance to particle media, its hardness can reach about HRC45.Sealing surface adopts automatic grinding, improves the Percent of contact area of sealing surface.
Its three, adopt Flexible disc, suitably reduce elasticity ratio, valve seal is reliable.Set up lacing wire in flashboard T word groove side, prevent flashboard T word groove in operating mode stressed too quickly, T word groove is torn, and easily causes the accident.In the guiding groove edge of flashboard, be designed to fillet, and suitably strengthen guiding groove length, reduce the gap between valve body guiding rib and flashboard guiding groove, flashboard guiding groove and valve body guiding rib fit dimension lengthen, prevent valve to be stuck in opening and closing process, affect valve and open and close normally, valve is suitable for vertically, level, inclination install.
Its four, the corner of upper seal support, Packing seat, filler pressing sleeve is designed to fillet, and the suitable extra clearance of endoporus, cylindrical suitably reduces gap.Stem surface adopts roll forming, and adopts surface carburization process, improves stem surface hardness, prevents stem surface from pulling, plucking, reduces mechanical wear, decreases the operational torque of valve.
1. the weld seam that this product valve body, valve seat connect adopts full automatic welding connection technology, and valve body, valve seat adopt U-shaped weld seam, solve leak source in valve body, valve seat weld seam.
2. valve sealing face adopts Si Taili cemented carbide, and surface adopts roll forming, extends the working life of valve.Sealing surface adopts automatic grinding, improves the Percent of contact area of sealing surface.
3. adopt Flexible disc, suitably reduce elasticity ratio, valve seal is reliable.Set up lacing wire in flashboard T word groove side, prevent flashboard in operating mode stressed too quickly, T word groove is torn, and easily causes the accident.In the guiding groove edge of flashboard, be designed to fillet, and suitably strengthen guiding groove length, prevent valve to be stuck in opening and closing process.
4. the corner of upper seal support, Packing seat, filler pressing sleeve is designed to fillet, and the suitable extra clearance of endoporus, cylindrical suitably reduces gap.Stem surface adopts roll forming, and adopts surface carburization process, improves stem surface hardness, prevents stem surface from pulling, plucking, reduces mechanical wear, decreases the operational torque of valve.
As shown in Figure 1, be the valve control system structural drawing of the embodiment of the present invention.
Valve control system of the present invention, comprising: main control module, energy supply control module, power supply, valve position signal module, I/O module, pressure transducer, temperature transducer, display modular, A/D module, valve control module, valve events control circuit, communication module, bluetooth module, wireless module, and, serial port transform USB module.
Described main control module, with described I/O module, communication module, valve control module is connected, and controls described control system for entirety;
Described energy supply control module, is connected with described power supply with described I/O module, for controlling the power supply of described power supply;
Described power supply, is connected with described energy supply control module, for powering for described control system;
Described valve position signal module, is connected with described I/O module, for carrying valve position signal to described I/O module;
Described I/O module, respectively with described valve position signal module, energy supply control module, A/D module, main control module is connected, for the input output of baseband signal information;
Described pressure transducer, is connected with described A/D module, for perception cryogenic ball valve or the pressure of pipeline that is connected with cryogenic ball valve, and by aforementioned pressure Signal transmissions to described A/D module;
Described temperature transducer, is connected with described A/D module, for perception cryogenic ball valve or the temperature of pipeline that is connected with cryogenic ball valve, and by aforementioned temperature Signal transmissions to described A/D module;
Described display modular, is connected with described A/D module, for the temperature and pressure of the pipeline that shows cryogenic ball valve or be connected with cryogenic ball valve;
Described A/D module, respectively with described I/O module, pressure transducer, temperature transducer, display modular is connected; For by pressure transducer, the signal of temperature transducer transmission carries out A/D or D/A conversion; And the information after conversion is communicated with display modular with I/O module;
Described valve control module, is connected with valve events control circuit with described main control module respectively; Instruction manipulation for sending according to described main control module is described sends out control circuit, and sends the signal that described valve events control circuit is passed back back to described governor circuit;
Described valve events control circuit, is connected with described valve control module, for the instruction manipulation valve closing carried according to it, opens, or stops valve;
Described communication module, with described main control module, bluetooth module, wireless module is connected, for self or wireless data communication;
Described bluetooth module, is connected with described communication module, for self communication of described control system;
Described wireless module, is connected with described communication module, for described control system and outside wireless telecommunications;
Described serial port transform USB module, is connected with described communication module, for the mutual conversion of serial data and usb data.
As shown in Figure 2, be the valve control system functional diagram of the embodiment of the present invention.
According to the requirement of cryogenic ball valve and coupled pipeline, the control system of ball valve of the present invention can stable operation under severe conditions, each parts of control system all select higher reliability and lower power consumption.Supervisory system can monitor the operating pressure of pipeline, and valve chamber main line blocks the state of ball valve, and the state of actuator and ambient temperature etc. normally run relevant data to pipeline.Can also will occur that abnormal data are uploaded to control centre immediately while monitoring.Excessive if there is the exceptional value and pressure drop rate exceeding setting range for line pressure, control system can control Shuttoff Valve automatically.
The pressure transducer input pressure signal of control system of the present invention.Temperature transducer input temp signal.Display modular has vapour-liquid valve state-indicating function.Vapour-liquid valve state comprises: gas-oil valve reach position instruction, gas-oil valve close put in place instruction, gas-oil valve on the spot/remote status, control system explosion-proof door state.The control of control system of the present invention exports when also comprising monitoring pipeline exception and automatically controls to close valve.
The main control module of control system of the present invention receives from I/O module, the valve position state of the gas-liquid actuator that valve control module is uploaded, state of alarm and test mode.Main control module accept from control centre open and close, stop three kinds of remote operation orders.Control system can perform open and close at any time according to the order of control centre, stop three kinds of operations.
Valve opening operates:
Valve opening condition: control system receives the valve opening order of control centre, and valve opening location switch is not closed.
Valve opening exports: control system is put valve opening and exported effectively, put close valve export invalid.
Valve opening stops: valve opening location switch closes, or receives new stopping valve or close valve order.
Pass valve operation:
Close valve condition: control system receives the pass valve order at center, pass valve location switch is not closed.
Control system is put and is closed valve and export effectively, put valve opening export invalid.
Close valve location switch to close, or receive and new stop valve or valve opening order.
What control system received control centre stops valve order.
Control system put valve opening export invalid, put close valve export invalid.
The major function of control system of the present invention can be divided into:
1. data acquisition and processing (DAP) part: the pressure needed for control system of the present invention gathers, temperature, cell voltage, the data such as valve position state.And the main control module of control system needs whether normally to monitor these data, occurs that abnormal conditions terminal needs process accordingly according to different situation.
2. communication part: control system with usB interface, Bluetooth function, wireless communication function; USB interface is used for carrying out the setting of parameter and the configuration of some constants; Bluetooth function is used for short-range wireless telecommunications, and convenient inspector at ordinary times checks; Wireless communication function is used for the monitor staff's communication with control centre, occurs extremely can reporting control centre, and control centre also can carry out Remote operation by control system of the present invention to cryogenic ball valve valve chamber simultaneously.
3. control output: it is control actuator to open that the control of control system of the present invention exports one, closing valve action; Another is the work controlling power module.
The signals collecting of control system of the present invention and filtering
1. signals collecting
Set-up of control system of the present invention is that per second completing once is sampled, and comprises pipeline pressure AIN0, control system operating ambient temperature AIN4, cell voltage AIN47 by the analog signals of A/D module inlet opening sampling; The digital switch quantity signal gathered by the inlet opening of I/O module is comprised valve and reaches a signal IN00, and close put in place signal IN01, control system chamber door signal IN02, valve is long-range, local operation signal IN03.
2. the filtering method of pressure signal and the method for judgement leakage
As the significant data of monitoring, when gathering pressure signal, in order to overcome the impact of interference, the control system of ball valve of the present invention carries out rolling average value filtering to multiple repairing weld value.Be the window of N at data length, ask for arithmetic mean value when image data meets length of window according to following formula.
Adopt at this quantity of information filtering that just utilizes new data to provide after new data and by former data cover, finally obtain the arithmetic mean value of the N number of data in current buffer again.Upgrade filter result according to new sampled value, namely survey data newly gathers one and just abandons the data gathered before N time, measures and once just calculates a mean value, greatly accelerate the ability of data processing.N can arrange change.
By the pressure data that rolling average value filtering obtains, needs and the front pressure comparison calculated of once sampling calculate pressure drop speed (RoD) per second.Consider the impact of temperature on pipeline pressure, by Clapyron Equation:
p·v＝n·R·T
P: pressure, v: rock gas volume, n: amount of substance, T: temperature, R: constant 8.31441
If when not occurring to leak, ROD is 0;
When occurring to leak, Rod meets following formula relation, and wherein, △ t is sampling interval duration;
In pipeline normally runs, line pressure steadily remains on a fixing value range.When having pipeline or cryogenic ball valve to leak, the pressure in pipeline or cryogenic ball valve will decline.When control system of the present invention is the ROD calculated and the parameter comparison preset, exceed this parameter and then think the pressure drop excessive velocities of cryogenic ball valve or pipeline, pipeline generation pipe explosion accident, needs to carry out pass valve operation to the block valve of main line and reduces the loss as far as possible.In addition, control system of the present invention is also monitored the normal operating pressure of pipeline, when occurring that force value exceeds or lower than the abnormal conditions of this scope, and also can throttle down protective conduit safety.
As shown in Figure 3, be valve control method data sampling and the process chart of the embodiment of the present invention.The collecting treatment flow process of the signal of control system of the present invention is:
The first step: main control module sends sign on;
Second step: temperature transducer is by the temperature signal that collects respectively by A/D module, and the signal conversion of I/O module and conduction, report main control module by the temperature signal after process;
3rd step: pressure transducer is by the pressure signal that collects respectively by A/D module, and the signal conversion of I/O module and conduction, report main control module by the pressure signal after process;
4th step: main control module carries out rolling average value filtering;
5th step: main control module carries out ROD calculating; Judge whether to transfinite; If so, timer starts; Otherwise by valve control module, main control module detects whether valve state is intermediate state;
6th step: valve state is intermediate state, starts timer, and by alert process task start; Otherwise, detection case door state;
7th step: chamber door state is opened, starts alert process task; Otherwise, time delay one second.
In the embodiment of the present invention, the analog-digital converter that analog to digital conversion circuit adopts is the AD7859 of ADI company of the U.S., and it is the AD converter of a high speed, low power consumption, 8 passages, 12bit, adopts 3V/5V single power supply.This device has self checking or system check function, can guarantee can change exactly when time and temperature variation.AD7859 has the sample rate of the highest 200kSPS, input voltage range: be 0-V during single ended input
rEF, Differential Input is then+-V
rEF/ 2.In design, reference voltage selects external reference voltage source 5V.CMOS structure guarantee AD7859 in the normal mode power consumption is 5.4mw, only has 3.6uW at low power modes.
AD7859 has following main feature:
3V or SV Power supply, applied power source management options, automatically transfers low-power consumption mode to after converting; Two kinds with reference to electric source modes: internal reference voltage source and external reference voltage source.When adopting external reference voltage source, voltage range is 1.2V ~ V
dD(power supply voltage); . self checking and system check; .8 position/16 bit data parallel interface (system requirements parallel interface is 8 parallel-by-bit interfaces).
In the control system of ball valve of the present invention, the master clock signal CLKIN of equipment is set as 4MHz, adopts external reference voltage source.AV
dD, DV
dDafter powering on, first
pulse triggering BUSY is high, BUSY signal between high period,
signal is inoperative, after 32ms, and BUSY step-down.Next
pulse triggering starts complete self checking, and triggering BUSY is high again, and checking time needs 32/72ms.
As shown in Figure 4, be AD7859 circuit connection diagram in the A/D module of the embodiment of the present invention.After having verified, at CONVST rising edge of a pulse subsequently, on sheet, tracking/retainer is converted to Holdover mode from tracing mode, and the CLKIN signal trailing edge and then after CONVST starts AD conversion.If the rising edge of CONVST pulse occurred before the trailing edge 10ns of CLKE signal, from CLKIN trailing edge, conversion can be completed through 16.5 clock cycle.If before CLK gets trailing edge, CONVST does not reach the building-up time of 1ons, and conversion then needs 17.5 clock cycle.After converting, BUSY signal step-down, transformation result exports by data/address bus.When once the CONVST burst length does not reach 200ns on transition period or distance, forbid read-write operation.
In the control system of ball valve of the present invention, to the configuration of the running parameter of AD7859 by completing with the write operation of byte mode twice pair of AD control register (16hit).Word/byte manipulation is controlled by the low and high level of W/B pin, and read/write follows first low rear high sequence of operation, and configuration parameter comprises: sampling channel is selected, powder source management mode, sample rate etc.After AD control register configures, a CONVST switching signal is provided by primary processor, after AD7859 power-on self-test completes, carry out the circuit-switched data sampling pre-set, sampling completes, and ADC internal trigger AD interrupts, and main control unit INT6 responds AD and interrupts, in AD interrupt service subroutine, single-chip microcomputer makes two bites at a cherry the sampled value read in adc data register.Single channel unitary sampling completes, and again by write operation configuration AD control register, carries out another circuit-switched data sampling, and after four tunnel samplings all complete, circulation aforesaid operations, until complete AD sampling.
As shown in Figure 5, be the RS-485 serial line interface long splice composition of the embodiment of the present invention.Ball valve control system data transmission circuit design of the present invention is as follows:
Relative to RS-232 serial line interface, it is high that the RS-485 that the present invention uses has data transfer rate, maximum transmission distance is far away, the advantages such as noise immunity is good, between ball valve control system module of the present invention, and between ball valve control system of the present invention and control centre, adopt RS-485 (two-wire) asynchronous serial port to realize communication.
RS-485 adopts differential signal negative logic, and the voltage difference of line-to-line is presentation logic between+2 ~+6V " 0 ", the voltage difference of line-to-line is-6V--2V presentation logic " 1 ".Chip adopts the MAX487ESA communication chip of Maxim company.This chip 4.75 ~ 5.25V powers, semiduplex mode, and peak data transfer rate can reach 250kbPs, has+the over-voltage protecting function of-15kV.Its long splice composition as shown in Figure 5.
In system transfers process, in order to ensure data zero defect, without losing transmitting, serial networking equipment Nport5430 of the present invention is configured to two-wire RS-485 pattern: position of rest, check bit, data bit etc. are consistent with the data format of circuit transmission interface; NPort5430 adds automatic flow control function, and meanwhile, FIFO is enable.
Ball valve control system real time clock circuit of the present invention:
Data capture needs the data gathered to be mapped with collection environment, and carry out corresponding data processing work, therefore, in control system of the present invention, all data must mark correct time information.If adopt the clock source of inaccuracy or change, can cause the data that gather not environmental information accurately, data do not have too many meaning undoubtedly, so, select a highi degree of accuracy, the clock source of low power consumption is very necessary.DS1307 is a highi degree of accuracy, the low power consumption of the release of DallaSSemieonduetor company, 8 pin real-time timepiece chips of binary-coded decimal.This chip provides month to date error to be less than the accuracy of timekeeping of 10 seconds, and inner integrated IZc EBI, has the non-volatile ram of 8 specified registers and 56Byte in sheet.
In addition, on the sheet of DS1307, control circuit possesses power detecting function, and manages the switching between primary power supply and standby power supply.
Claims (8)
1. a control system for cryogenic ball valve, is characterized in that,
Described cryogenic ball valve, comprising: valve body, valve gap, valve component, spheroid, valve rod and stationary axle;
The control system of described cryogenic ball valve, comprising: main control module, energy supply control module, power supply, valve position signal module, I/O module, pressure transducer, temperature transducer, display modular, A/D module, valve control module, valve events control circuit, communication module, bluetooth module, wireless module, and, serial port transform USB module;
Described main control module, with described I/O module, communication module, valve control module is connected, and controls described control system for entirety;
Described energy supply control module, is connected with described power supply with described I/O module, for controlling the power supply of described power supply;
Described power supply, is connected with described energy supply control module, for powering for described control system;
Described valve position signal module, is connected with described I/O module, for carrying valve position signal to described I/O module;
Described I/O module, respectively with described valve position signal module, energy supply control module, A/D module, main control module is connected, for the input output of baseband signal information;
Described pressure transducer, is connected with described A/D module, for perception cryogenic ball valve or the pressure of pipeline that is connected with cryogenic ball valve, and by aforementioned pressure Signal transmissions to described A/D module;
Described temperature transducer, is connected with described A/D module, for perception cryogenic ball valve or the temperature of pipeline that is connected with cryogenic ball valve, and by aforementioned temperature Signal transmissions to described A/D module;
Described display modular, is connected with described A/D module, for the temperature and pressure of the pipeline that shows cryogenic ball valve or be connected with cryogenic ball valve;
Described A/D module, respectively with described I/O module, pressure transducer, temperature transducer, display modular is connected; For by pressure transducer, the signal of temperature transducer transmission carries out A/D or D/A conversion; And the information after conversion is communicated with display modular with I/O module;
Described valve control module, is connected with valve events control circuit with described main control module respectively; For the instruction sent according to described main control module is manipulated described valve events control circuit, and send the signal that described valve events control circuit is passed back back to governor circuit;
Described valve events control circuit, is connected with described valve control module, for the instruction manipulation valve closing carried according to it, opens, or stops valve;
Described communication module, with described main control module, bluetooth module, wireless module is connected, for self or wireless data communication;
Described bluetooth module, is connected with described communication module, for self communication of described control system;
Described wireless module, is connected with described communication module, for described control system and outside wireless telecommunications;
Described serial port transform USB module, is connected with described communication module, for the mutual conversion of serial data and usb data.
2. the control system of cryogenic ball valve according to claim 1, it is characterized in that, described valve body, valve gap respectively have runner, and valve body, valve gap are connected by pad, stud, nut.
3. the control system of cryogenic ball valve according to claim 1, it is characterized in that, described spheroid is placed in valve body, and two sides of described spheroid are respectively provided with a valve component, and are connected with the inside of described valve body, described valve gap respectively.
4. the control system of cryogenic ball valve according to claim 1, it is characterized in that, described cryogenic ball valve is provided with drive unit further, and described drive unit is connected by key with described valve rod top, and described valve rod lower end is connected with described spheroid.
5. the control system of cryogenic ball valve according to claim 1, it is characterized in that, described spheroid top and bottom surface, valve stem contacts position are arc shaped surface, both sides are respective parallel plane, described spheroid bottom is connected with stationary axle, radial bearing, plane bearing by cylindrical hole, and is provided with the spring of antistatic in bottom surface.
6. the control system of cryogenic ball valve according to claim 1, is characterized in that, described pressure transducer input pressure signal; Described temperature transducer input temp signal; Described display modular has vapour-liquid valve state-indicating function; The vapour-liquid valve state of described control system comprises: gas-oil valve reach position instruction, gas-oil valve close put in place instruction, gas-oil valve on the spot/remote status, control system explosion-proof door state.
7. the control system of cryogenic ball valve according to claim 1, is characterized in that, described main control module receives from I/O module, the valve position state of the gas-liquid actuator that valve control module is uploaded, state of alarm and test mode; Described main control module accept from control centre open and close, stop three kinds of remote operation orders; Control system can perform open and close at any time according to the order of control centre, stop three kinds of operations.
8. the control system of cryogenic ball valve according to claim 7, is characterized in that,
Described valve opening is operating as:
Valve opening condition: control system receives the valve opening order of control centre, and valve opening location switch is not closed;
Valve opening exports: control system is put valve opening and exported effectively, put close valve export invalid;
Valve opening stops: valve opening location switch closes, or receives new stopping valve or close valve order;
Described pass valve is operating as:
Close valve condition: control system receives the pass valve order at center, pass valve location switch is not closed;
Control system is put and is closed valve and export effectively, put valve opening export invalid;
Close valve location switch to close, or receive and new stop valve or valve opening order;
The described valve that stops is operating as:
Control system put valve opening export invalid, put close valve export invalid.
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| CN103836224A (en) * | 2013-01-29 | 2014-06-04 | 江苏盐电阀门有限公司 | Ball valve and control method thereof |
| CN105485386B (en) * | 2015-12-31 | 2018-08-17 | 平湖市瑞阳精密机械有限公司 | A kind of low-temperature reduced-pressure device |
| CN105619027B (en) * | 2016-01-21 | 2017-07-21 | 江苏盐电阀门有限公司 | A kind of wedge top formula ultra-low temperature ball valve |
| CN107575593A (en) * | 2017-09-25 | 2018-01-12 | 南京律智诚专利技术开发有限公司 | A kind of electro-hydraulic dynamic intelligent-induction valve system |
| WO2022229176A1 (en) * | 2021-04-30 | 2022-11-03 | Gea Tuchenhagen Gmbh | Valve control device |
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