CN102444290A - Automatic tension control system and method thereof - Google Patents
Automatic tension control system and method thereof Download PDFInfo
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- CN102444290A CN102444290A CN2011102754828A CN201110275482A CN102444290A CN 102444290 A CN102444290 A CN 102444290A CN 2011102754828 A CN2011102754828 A CN 2011102754828A CN 201110275482 A CN201110275482 A CN 201110275482A CN 102444290 A CN102444290 A CN 102444290A
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Abstract
The invention relates to an automatic tension control system and a method thereof, relating to a system and a method for applying pre-stress on a pre-stressed component in civil engineering. The system comprises an electric oil pump, a hydraulic jack, a controller of the automatic tension control system, a data relay controller and a computer. A pull rod type displacement sensor and a pressure sensor are arranged on the hydraulic jack. Control valve rods of left and right control valves of the electric oil pump are connected with a stepping motor. The controller of the automatic tension control system comprises a MCU (Micro-programmed Control Unit) single chip microcomputer, functional keystrokes, a displacement collection unit, a pressure collection unit, a buzzing and alarming unit, a display unit, a driving module, a motor steering output unit, a motor steering and stopping output unit and a motor pulse output unit. The method comprises the steps of tensioning, unloading and the like. According to the system and the method disclosed by the invention, the tension precision can be increased; the tension uncontrolled accident of the pre-stressed reinforcing steel can be effectively avoided; the system and the method have the characteristics of being simple in structure, low in cost, safe, reliable, low in quality monitoring difficulty, simple in method and convenient for operation; and the system and the method are applied to various fields.
Description
Technical field
The present invention relates to a kind ofly in civil engineering, prestressed member applied prestressed system and method particularly a kind of automatic stretch-draw control system and method thereof.
Background technology
At present; In civil engineering; Prestressed member is applied prestressed traditional prestressed tensioning system generally comprise oil pump and hydraulic jack, this system is when construction, and the stretching force that hydraulic jack applied is to control through the oil pressure gauge that the constructor observes on the oil pump; The elongation value of stretching of presstressed reinforcing steel then is to measure with ruler through manual work; There is following shortcoming in this prestressing force pull system: 1, because the human factor influence is bigger, and certainty of measurement is lower, measurement result exists bigger error bigger; 2, pressure gauge reading is unstable, be difficult to pin-point reading, and rate of reading is slow, need be converted by pressure gauge reading and just can know the size of stretching force, can not form the intuitive concept of stretching force, and is inconvenient to control stretch-draw; 3, when stretch-draw, take place to cause prestressed stretch-draw accident out of control through regular meeting because of human factor, more dangerous; 4, quality monitoring difficulty inner at prestressed member or during than the operation of some more hidden places is bigger; 5, need manpower bigger, quality-control cost is higher.Continuous development along with prestressing technique; Also there are many people to propose to adopt automatic tensioning system to solve the problems referred to above, but the structure more complicated of these automatic tensioning systems, cost is higher; But also can not reach real automatic stretch-draw control, thereby also do not obtain real popularizing.
Summary of the invention
The technical problem that the present invention will solve is: a kind of automatic stretch-draw control system and method thereof are provided, and above-mentioned stretch-draw precision is low to solve, dangerous, big, the baroque problem of quality monitoring difficulty of construction.
The technical scheme that solves the problems of the technologies described above is: system is controlled in a kind of automatic stretch-draw; Comprise electric oil pump, by the hydraulic jack of electric oil pump control; Described automatic stretch-draw is controlled system and is also included automatic stretch-draw control system controller, data window machine controller and computer; Also be equipped with on the described hydraulic jack and can be separately installed with pressure sensor on the inlet nozzle of hydraulic jack and the oil return nozzle with the rod-pulling type displacement transducer of piston rod movement; The control valve rod of described electric oil pump left and right sides control valve is connected with stepper motor through the stepper motor connector; Described automatic stretch-draw control system controller comprises MCU single-chip microcomputer, function button, displacement acquisition unit, pressure acquisition unit, buzzing and alarm unit, display unit, driver module, motor steering output unit, motor commentaries on classics stopping output unit, motor pulses output unit; Said MCU input of single chip is connected with function button, displacement acquisition unit, pressure acquisition unit respectively; The displacement acquisition unit is connected with the rod-pulling type displacement transducer of hydraulic jack, and pressure acquisition unit is connected with pressure sensor on hydraulic jack inlet nozzle, the oil return nozzle; Said MCU single machine output end is connected with buzzing and alarm unit, display unit, driver module respectively; Driver module changes with motor steering output unit, motor respectively and stops output unit, the motor pulses output unit is connected, and described motor steering output unit is connected with the stepper motor of electric oil pump respectively with the motor pulses output unit; The motor commentaries on classics stops output unit and is connected with relay K; Relay K is connected with the main relay of control electric oil pump master machine operation again; Described data window machine controller comprises power supply and the transmission signal TCU transfer control unit that is connected with this power supply; The input of this transmission signal TCU transfer control unit is connected through the driver module output of signal-transmitting cable with automatic stretch-draw control system controller, and the output of transmission signal TCU transfer control unit is connected with the input of computer.
Further technical scheme of the present invention is: described rod-pulling type displacement transducer is fixedly mounted on the hydraulic jack oil cylinder cylindrical; The piston external part of said hydraulic jack is installed with the U-shaped junction plate that cylindrical has U-lag; Being equipped with in the U-lag of U-shaped junction plate can be along the guide plate of U-lag slip, and the drag link end of this guide plate and rod-pulling type displacement transducer links together through nut.
Further again technical scheme of the present invention is: also be installed with the piston anti-rotating device on the oil cylinder cylindrical of said hydraulic jack; This piston anti-rotating device comprises anti-rotaring sleeve and anti-rotation pull bar; Described anti-rotation pull bar is positioned at anti-rotaring sleeve, and anti-rotation pull bar one end stretches out the outer nut that also passes through of anti-rotaring sleeve and is connected with guide plate.
Further technical scheme of the present invention is: described stepper motor comprises No. 1 stepper motor, No. 2 stepper motors, No. 3 stepper motors, No. 4 stepper motors; Described stepper motor connector comprises towards opposite adpting flange A and adpting flange B; The central shaft hole of said adpting flange A and the output shaft of stepper motor are connected, and through passing the trip bolt locking of stepper motor output shaft and adpting flange A; The control valve rod of the central shaft hole of said adpting flange B and electric oil pump left and right sides control valve is connected, and through passing the trip bolt locking of control valve rod and adpting flange B; Described adpting flange A and adpting flange B link together through connecting pin.
Another technical scheme of the present invention is: a kind of automatic stretching control method, and this method may further comprise the steps:
Sep1, startup computer and automatic stretch-draw control system controller, stretch-draw control system controller sends signal to four stepper motors automatically, and four stepper motors all reverse, and stop automatically when forwarding in the time of can not rotating;
Sep2, automatically stretch-draw control system controller sends closure signal to relay K, and relay K is connected, and relay K is controlled the main relay of main motor, this moment main electrical power, electric oil pump is started working;
Sep 3, the pressure sensor energising that is positioned on hydraulic jack oil-feed, the oil return nozzle are started working, and zero setting;
Sep 4, automatic stretch-draw control system controller send to No. 2 stepper motors and clockwise rotate signal, and No. 2 stepper motors clockwise rotate up to not changeing when ending and stop automatically; After No. 2 stepper motor quit work, No. 1 stepper motor began to clockwise rotate the control control valve to the hydraulic jack fuel feeding, promotes piston motion, and hydraulic jack is started working;
Sep 5, the pressure sensor that is installed on hydraulic jack inlet nozzle and the oil return nozzle begin detected pressures; And transfer signals in the automatic stretch-draw control system controller; Automatically stretch-draw control system controller is handled signal after the data window machine controller is transferred to computer; On computer screen, show operating pressure, backhaul pressure in real time, and through being installed in the automatic evaluation work stretching force of stretching force design formulas of the software generation in the computer;
Being with the rod-pulling type displacement to pass device after Sep 6, the hydraulic jack piston motion moves; The rod-pulling type displacement transducer exports signal to automatic stretch-draw control system controller; Automatically stretch-draw control system controller is handled signal after the data window machine controller is transferred to computer, on the screen of computer, shows displacement in real time;
Sep 7, input working parameter on computers, stretch-draw control system controller receives and is the hydraulic jack pressurization by the running parameter control step motor of input automatically, makes hydraulic jack accomplish stretching process;
Sep 8, after accomplishing stretching process, get into the off-load process;
Sep 9, rod-pulling type displacement transducer make zero, and promptly accomplish the single tension process.
Further again technical scheme of the present invention is: in step Sep 7, the said running parameter of input on computers is predefined serial oil pressure parameter value; Described automatic stretch-draw control system controller is the hydraulic jack pressurization by the running parameter control step motor of input; Make the particular content of hydraulic jack completion stretch-draw work following: No. 1 stepper motor of stretch-draw control system controller control clockwise rotates automatically; When the detected oil pressure of the pressure sensor that is positioned at the hydraulic jack oil-in reaches predefined minimum oil pressure parameter value; No. 1 stepper motor stops operating automatically; And the time of maintenance setting, write down the displacement of this moment on the computer automatically; No. 1 stepper motor begins again to clockwise rotate then; When the pressure sensor that is positioned at the hydraulic jack oil-in detects oil pressure and reaches predefined next oil pressure parameter value; No. 1 stepper motor stops operating again automatically; And the time of maintenance setting, write down the displacement of this moment on the computer automatically; No. 1 stepper motor carries out work according to this, reaches predefined maximum oil pressure parameter value until oil pressure, and keeps the time of setting, and at this moment, the hydraulic pressure hydraulic jack is accomplished stretching process.
Further technical scheme of the present invention is: in step Sep 8, described entering off-load process particular content is following: No. 1, No. 2 stepper motor rotates counterclockwise and forwards in the time of can not rotating and stops automatically; After No. 1, No. 2 stepper motor stopped, No. 3 stepper motors began to clockwise rotate up to forwarding in the time of can not rotating and stop automatically; When No. 3 stepper motor stopped, No. 4 stepper motor began to clockwise rotate, and stops operating automatically in the time of till can not rotating; The pressure sensor that is positioned at the hydraulic jack oil return opening detects backhaul pressure and is presented on the screen of computer, and when backhaul pressure during greater than 25MPa, red eye begins glittering, and No. 4 stepper motor stops automatically; Whether the rod-pulling type displacement transducer detects and makes zero in this process, as makes zero, and No. 4 stepper motor stops automatically; Promptly be that pressure sensor and the rod-pulling type displacement transducer that is positioned at the hydraulic jack oil return opening detects simultaneously, which reaches the condition of setting earlier, and which just sends the signal that stops to No. 4 stepper motors; No. 4 stepper motor stops operating, and accomplishes the off-load process.
Owing to adopt technique scheme, the present invention's automatic stretch-draw control system and method thereof compared with prior art have following beneficial effect:
1, can increase substantially the stretch-draw precision:
Because the present invention is except comprising electric oil pump, hydraulic jack; Also include automatic stretch-draw control system controller, data window machine controller and computer; And pressure sensor and displacement transducer be installed also on hydraulic jack; Also on the basis of existing electric oil pump, the control valve rod of left and right sides control valve is controlled oil-feed and oil return and oil pressure automatically by manually changing four stepper motors into.The present invention can replace the existing manual monitoring fully through pressure sensor and displacement transducer and the cooperation of stretch-draw control system controller automatically, and its monitoring velocity is very fast; Man-machine interface through computer; Not only can realize the remote visualization operation; The oil pressure value of the present invention when stretch-draw, the elongation value of stretching of presstressed reinforcing steel can be write down on computers automatic accurately, and the automatic evaluation work stretching force of stretching force design formulas that computer generates through the software that is installed in advance in the computer has more really reached the purpose of full-automatic stretch-draw control; Thereby avoided human factor to cause the big problem of measure error, significantly improve prestressed stretch-draw precision.
In addition; Because pressure sensor of the present invention is mounted on the inlet nozzle and oil return nozzle of hydraulic jack; It is away from oil pump master motor; Avoided having guaranteed the accuracy of pressure sensor image data, thereby further having improved prestressed stretch-draw precision because of main machine operation produces electromagnetic interference.
2, can avoid tension of prestressed tendon accident out of control effectively:
Each sensor signal of the present invention can be controlled the duty of hydraulic jack automatically through automatic stretch-draw control system controller; Can when reaching control stress for prestressing or exceed the control range of Extension Values of Prestress Reinforcements, stop stretch-draw automatically; Thereby the tension of prestressed tendon accident out of control that can avoid human factor to cause effectively is more safe and reliable.
3, quality monitoring difficulty is little:
Because the present invention can realize full-automatic stretch-draw control, and automatic stretch-draw control system controller of the present invention receives and handles through the signal that the communications cable is sent, to data pack send out and with transfer of data to the data window machine controller; Again data transfer signal is changed by the data window machine controller; Make to have strong interference immunity, long transmission distance in the data transmission procedure, reach about 1 kilometer, can satisfy far distance controlled; Its quality monitoring difficulty is little; Therefore, the present invention can be suitable in the operation of various places, particularly is suitable in prestressed member inside or than some more hidden place operations.
4, simple in structure, cost is low:
Stretch-draw control system only comprises electric oil pump, hydraulic jack automatically, system controller, data window machine controller and computer are controlled in stretch-draw automatically for this, and it is relatively simple for structure, need not other complicated huge control system, and cost is lower.Because the present invention can realize full-automatic stretch-draw control, also can significantly reduce the constructor, in addition to reduce its quality-control cost.
5, rational in infrastructure reliable:
Because rod-pulling type displacement transducer of the present invention is to be connected with guide plate through nut with the piston anti-rotating device; Its guide plate is installed in the U-shaped junction plate that is fixed on the piston; When piston motion, driving guide plate moves together; Guide plate can slide in the U-lag of U-shaped junction plate, thereby damages displacement transducer can avoid piston rotation the time; Therefore, structure of the present invention is relatively rationally reliable.
6, method is simple, and is easy to operate:
Because the present invention can realize full-automatic stretch-draw control, its control method is very simple, and operation is very easy.
Below, in conjunction with accompanying drawing and embodiment the present invention's the automatic stretch-draw control system and the technical characterictic of method thereof are further described.
The structural representation of system is controlled in Fig. 1: embodiment one said the present invention's automatic stretch-draw;
Fig. 2: the theory diagram of system master system device, data window machine controller is controlled in stretch-draw automatically;
Fig. 3～Fig. 4: the annexation sketch map between position rod-type displacement transducer and the hydraulic jack,
Fig. 3: front view, the vertical view of Fig. 4: Fig. 3;
Fig. 5: the annexation sketch map between stepper motor and the electric oil pump control valve rod;
The structural representation of system is controlled in Fig. 6: embodiment two said the present invention's automatic stretch-draw;
The FB(flow block) of Fig. 7: embodiment three said the present invention's automatic stretching control method.
In above-mentioned accompanying drawing, the label of each part is following:
The 1-electric oil pump, the 101-stepper motor, the 1011-1 stepper motor, the 1012-2 stepper motor,
The 1013-3 stepper motor, the 1014-4 stepper motor, 102-master's motor, the 103-main relay,
The 104-relay K, the 105-trip bolt, 106-adpting flange A, the 107-connecting pin,
108-adpting flange B, 109-controls valve rod, the 2-hydraulic jack,
201-rod-pulling type displacement transducer, the 202-pressure sensor, the 203-guide plate,
204-U shape junction plate, 205-piston external part, 206-piston anti-rotating device,
2061-prevents rotaring sleeve, 2062-anti-rotation pull bar, and the automatic stretch-draw control of 3-system controller,
The 301-MCU single-chip microcomputer, the 302-function button, 303-displacement acquisition unit,
The 304-pressure acquisition unit, 305-buzzing and alarm unit, the 306-display unit,
The 307-driver module, 308-motor steering output unit, 309-motor change and stop output unit,
310-motor pulses output unit, 4-data window machine controller, the 5-computer,
The automatic stretch-draw control of the 6-A of system, the automatic stretch-draw control of the 7-B of system.
Specific embodiment
Embodiment one:
Disclosed among Fig. 1 is a kind of automatic stretch-draw control system, comprises electric oil pump 1, by the hydraulic jack 2 of electric oil pump 1 control, and described automatic stretch-draw control system also includes automatic stretch-draw control system controller 3, data window machine controller 4 and computer 5.Being equipped with on the described hydraulic jack 2 can be with the rod-pulling type displacement transducer 201 of piston rod movement; This rod-pulling type displacement transducer 201 is fixedly mounted on the hydraulic jack oil cylinder cylindrical (referring to Fig. 3～Fig. 4); The piston external part 205 of said hydraulic jack is installed with the U-shaped junction plate 204 that cylindrical has U-lag; Being equipped with in the U-lag of U-shaped junction plate 204 can be along the guide plate 203 of U-lag slip, and this guide plate 203 links together through nut with the drag link end of rod-pulling type displacement transducer 201; Also be installed with piston anti-rotating device 206 on the oil cylinder cylindrical of said hydraulic jack; This piston anti-rotating device 206 comprises anti-rotaring sleeve 2061 and anti-rotation pull bar 2062; Described anti-rotation pull bar 2062 is positioned at anti-rotaring sleeve 2061, and anti-rotation pull bar 2,062 one ends stretch out the anti-rotaring sleeve 2061 outer nuts that also pass through and are connected with guide plate 204; Be separately installed with pressure sensor 202 on the inlet nozzle of described hydraulic jack 2 and the oil return nozzle.
The control valve rod of described electric oil pump 1 left and right sides control valve is connected through 1,014 four stepper motors of stepper motor connector and 1013, No. 4 stepper motors of 1012, No. 3 stepper motors of 1011, No. 2 stepper motors of No. 1 stepper motor; This stepper motor connector comprises towards opposite adpting flange A106 and adpting flange B108 (referring to Fig. 5); The output shaft of the central shaft hole of said adpting flange A106 and stepper motor 101 is connected, and trip bolt 105 lockings through passing stepper motor output shaft and adpting flange A106; The control valve rod 109 of the central shaft hole of said adpting flange B108 and electric oil pump left and right sides control valve is connected, and trip bolt 105 lockings through passing control valve rod 109 and adpting flange B108; Described adpting flange A106 and adpting flange B108 link together through connecting pin 107.
Described automatic stretch-draw control system controller 3 comprises MCU (abbreviation of Micro Control Unit) single-chip microcomputer 301, function button 302, displacement acquisition unit 303, pressure acquisition unit 304, buzzing and alarm unit 305, display unit 306, driver module 307, motor steering output unit 308, motor commentaries on classics stopping output unit 309, motor pulses output unit 310 (referring to Fig. 2); The input port of said MCU single-chip microcomputer 301 is connected with function button 302, displacement acquisition unit 303, pressure acquisition unit 304 respectively; Displacement acquisition unit 303 is connected with the rod-pulling type displacement transducer 201 of hydraulic jack 2, and pressure acquisition unit 304 is connected with pressure sensor 202 on hydraulic jack 2 inlet nozzles, the oil return nozzle; The output port of said MCU single-chip microcomputer 301 is connected with buzzing and alarm unit 305, display unit 306, driver module 307 respectively; Driver module 307 changes with motor steering output unit 308, motor respectively and stops output unit 309, motor pulses output unit 310 is connected, and described motor steering output unit 308 is connected with the stepper motor 101 of electric oil pump respectively with motor pulses output unit 310; The motor commentaries on classics stops output unit 309 and is connected with relay K 104, and relay K 104 is connected with the main relay 103 of control electric oil pump master motor 102 work again; Described data window machine controller 4 comprises power supply 402 and the transmission signal TCU transfer control unit 401 that is connected with this power supply 402; The input of this transmission signal TCU transfer control unit 401 is connected through driver module 307 outputs of signal-transmitting cable with automatic stretch-draw control system controller, and the output of transmission signal TCU transfer control unit 401 is connected (referring to Fig. 2) with the input of computer 5.
Embodiment two:
Disclosed among Fig. 6 is a kind of automatic stretch-draw control system that is used for two hydraulic jack are carried out synchronous tension control; It includes automatic stretch-draw control A6 of system and the automatic stretch-draw control B7 of system two cover systems; Wherein the stretch-draw control A6 of system is that system is controlled in embodiment one described automatic stretch-draw automatically, and its detailed structure does not remake and repeats to give unnecessary details; Automatically the structure of the stretch-draw control B7 of system is controlled system with embodiment one described automatic stretch-draw basically; Difference is: the stretch-draw control B7 of system does not include data window machine controller 4 and computer 5 automatically; Driver module 307 outputs of the automatic stretch-draw control system controller of this automatic stretch-draw control B of system are connected through data window machine controller 4 inputs of signal-transmitting cable with the automatic stretch-draw control A of system; So automatic stretch-draw control A6 of system and the stretch-draw control B7 of system automatically promptly can a shared data window machine controller 4 and computers 5, to reach the purpose of two hydraulic jack being carried out Synchronization Control with same computer realization.
Certainly, as a kind of conversion of present embodiment two, according to the actual conditions needs, the present invention can also carry out Synchronization Control to three or three above hydraulic jack.
Embodiment three:
A kind of automatic stretching control method, this method are the methods of utilizing the described automatic stretch-draw control of a kind of embodiment one system to carry out stretch-draw control, and it may further comprise the steps (referring to Fig. 7):
Sep1, startup computer 5 and automatic stretch-draw control system controller 3, stretch-draw control system controller 3 sends signal to four stepper motors 101 automatically, and four stepper motors 101 all reverse (promptly reversing), stop automatically when forwarding in the time of can not rotating;
Sep2, automatic stretch-draw control system controller 3 send closure signal to relay K 104, and relay K 104 is connected, the main relay 103 of the main motor 102 of relay K 104 controls, and this moment, main motor 102 was switched on, and electric oil pump 1 is started working;
Being with the rod-pulling type displacement to pass device 201 after Sep 6, the hydraulic jack piston motion moves; Rod-pulling type displacement transducer 201 exports signal to automatic stretch-draw control system controller 3; Automatically stretch-draw control system controller 3 is handled signal after data window machine controller 4 is transferred to computer 5, on the screen of computer 5, shows displacement in real time;
Sep 7, on computer 5 input working parameter, this running parameter is predefined serial oil pressure parameter value, like 5MPa, 10MPa, 15MPa, 20MPa, 25MPa, 30MPa, 35MPa, 40MPa, 45MPa, 50MPa; The running parameter control step motor 101 that automatic stretch-draw control system controller 3 received and pressed input is that hydraulic jack 2 is pressurizeed; Make hydraulic jack 2 accomplish stretching process; Promptly be: No. 1 stepper motor 1011 of stretch-draw control system controller 3 controls clockwise rotates automatically; When the pressure sensor that is positioned at the hydraulic jack oil-in 202 detected oil pressure reached predefined minimum oil pressure parameter value 5MPa, No. 1 stepper motor 1011 stopped operating automatically, and kept time of setting; The time of this setting can be set arbitrarily, is set at 1 minute at present; Automatically write down the displacement of this moment on the computer; No. 1 stepper motor 1011 begins again to clockwise rotate then; When the pressure sensor that is positioned at the hydraulic jack oil-in 202 detects oil pressure and reaches predefined next oil pressure parameter value 10MPa; No. 1 stepper motor 1011 stops operating again automatically; And keep 1 minute setting-up time, write down the displacement of this moment on the computer automatically; No. 1 stepper motor 1011 carries out work according to this, reaches predefined operating oil pressure parameter value 50MPa until oil pressure, and keeps 1 minute setting-up time, and at this moment, hydraulic pressure hydraulic jack 2 is accomplished stretching process;
Sep 8, after accomplishing stretching process, get into the off-load process; Described entering off-load process particular content is following: No. 1, No. 2 stepper motor rotates counterclockwise and forwards in the time of can not rotating and stops automatically; After No. 1, No. 2 stepper motor stopped, No. 3 stepper motors 1013 began to clockwise rotate up to forwarding in the time of can not rotating and stop automatically; When No. 3 stepper motor 1013 stopped, No. 4 stepper motor 1014 began to clockwise rotate, and stops operating automatically in the time of till can not rotating; The pressure sensor 202 that is positioned at the hydraulic jack oil return opening detects the backhaul pressure and is presented on the screen of computer 5, and when backhaul pressure during greater than 25MPa, red eye begins glittering, and No. 4 stepper motor 1014 stops automatically; Whether the rod-pulling type displacement transducer detects and makes zero in this process, as makes zero, and No. 4 stepper motor 1014 stops automatically; Promptly be that the pressure sensor 202 that is positioned at the hydraulic jack oil return opening detects with the rod-pulling type displacement transducer simultaneously, which reaches the condition of setting earlier, and which just sends the signal that stops to No. 4 stepper motors 1014; No. 4 stepper motor 1014 stops operating, and accomplishes the off-load process.
Sep 9, rod-pulling type displacement transducer 201 make zero, and promptly accomplish the single tension process.
Claims (7)
1. system is controlled in an automatic stretch-draw; Comprise electric oil pump (1), by the hydraulic jack (2) of electric oil pump (1) control; It is characterized in that: described automatic stretch-draw is controlled system and is also included automatic stretch-draw control system controller (3), data window machine controller (4) and computer (5); Also be equipped with on the described hydraulic jack (2) and can be separately installed with pressure sensor (202) on the inlet nozzle of hydraulic jack (2) and the oil return nozzle with the rod-pulling type displacement transducer (201) of piston rod movement; The control valve rod (109) of described electric oil pump (1) left and right sides control valve is connected with stepper motor (101) through the stepper motor connector; Described automatic stretch-draw control system controller (3) comprises MCU single-chip microcomputer (301), function button (302), displacement acquisition unit (303), pressure acquisition unit (304), buzzing and alarm unit (305), display unit (306), driver module (307), motor steering output unit (308), motor commentaries on classics stopping output unit (309), motor pulses output unit (310); The input port of said MCU single-chip microcomputer (301) is connected with function button (302), displacement acquisition unit (303), pressure acquisition unit (304) respectively; Displacement acquisition unit (303) is connected with the rod-pulling type displacement transducer (201) of hydraulic jack (2), and pressure acquisition unit (304) is connected with pressure sensor (202) on hydraulic jack (2) inlet nozzle, the oil return nozzle; The output port of said MCU single-chip microcomputer (301) is connected with buzzing and alarm unit (305), display unit (306), driver module (307) respectively; Driver module (307) changes with motor steering output unit (308), motor respectively and stops output unit (309), motor pulses output unit (310) is connected, and described motor steering output unit (308) is connected with the stepper motor (101) of electric oil pump respectively with motor pulses output unit (310); The motor commentaries on classics stops output unit (309) and is connected with relay K (104); Relay K (104) is connected with the main relay (103) of control electric oil pump master's motor (102) work again; Described data window machine controller (4) comprises power supply (402) and the transmission signal TCU transfer control unit (401) that is connected with this power supply (402); The input of this transmission signal TCU transfer control unit (401) is connected through driver module (307) output of signal-transmitting cable with automatic stretch-draw control system controller, and the output of transmission signal TCU transfer control unit (401) is connected with the input of computer (5).
2. system is controlled in automatic stretch-draw according to claim 1; It is characterized in that: described rod-pulling type displacement transducer (201) is fixedly mounted on the hydraulic jack oil cylinder cylindrical; The piston external part (205) of said hydraulic jack is installed with the U-shaped junction plate (204) that cylindrical has U-lag; Being equipped with in the U-lag of U-shaped junction plate (204) can be along the guide plate (203) of U-lag slip, and this guide plate (203) links together through nut with the drag link end of rod-pulling type displacement transducer (201).
3. system is controlled in automatic stretch-draw according to claim 2; It is characterized in that: also be installed with piston anti-rotating device (206) on the oil cylinder cylindrical of said hydraulic jack; This piston anti-rotating device (206) comprises anti-rotaring sleeve (2061) and anti-rotation pull bar (2062); Described anti-rotation pull bar (2062) is positioned at anti-rotaring sleeve (2061), and anti-rotation pull bar (2062) one ends stretch out the outer nut that also passes through of anti-rotaring sleeve (2061) and are connected with guide plate (204).
4. control system according to claim 1 or 2 or 3 described automatic stretch-draw; It is characterized in that: described stepper motor (101) comprises No. 1 stepper motor (1011), No. 2 stepper motors (1012), No. 3 stepper motors (1013), No. 4 stepper motors (1014); Described stepper motor connector comprises towards opposite adpting flange A (106) and adpting flange B (108); The output shaft of the central shaft hole of said adpting flange A (106) and stepper motor (101) is connected, and through passing trip bolt (105) locking of stepper motor output shaft and adpting flange A (106); The control valve rod (109) of the central shaft hole of said adpting flange B (108) and electric oil pump left and right sides control valve is connected, and through passing trip bolt (105) locking of control valve rod (109) and adpting flange B (108); Described adpting flange A (106) and adpting flange B (108) link together through connecting pin (107).
5. automatic stretching control method, it is characterized in that: this method may further comprise the steps:
Sep1, startup computer (5) and automatic stretch-draw control system controller (3), stretch-draw control system controller (3) sends signal to four stepper motors (101) automatically, and four stepper motors (101) all reverse, and stop automatically when forwarding in the time of can not rotating;
Sep2, automatic stretch-draw control system controller (3) send closure signal to relay K (104); Relay K (104) is connected; Relay K (104) is controlled the main relay (103) of main motor (102), main motor this moment (102) energising, and electric oil pump (1) is started working;
Sep 3, pressure sensor (202) energising that is positioned on hydraulic jack oil-feed, the oil return nozzle are started working, and zero setting;
Sep 4, automatic stretch-draw control system controller (3) send to No. 2 stepper motors (1012) and clockwise rotate signal, and No. 2 stepper motors (1012) clockwise rotate up to not changeing when ending and stop automatically; After No. 2 stepper motors (1012) quit work, No. 1 stepper motor (1011) began to clockwise rotate the control control valve to hydraulic jack (2) fuel feeding, promotes piston motion, and hydraulic jack (2) is started working;
Sep 5, the pressure sensor (202) that is installed on hydraulic jack inlet nozzle and the oil return nozzle begin detected pressures; And transfer signals in the automatic stretch-draw control system controller (3); Automatically stretch-draw control system controller (3) is handled signal after data window machine controller (4) is transferred to computer (5); On computer screen, show operating pressure, backhaul pressure in real time, and through being installed in the automatic evaluation work stretching force of stretching force design formulas of the software generation in the computer (5);
Being with the rod-pulling type displacement to pass device (201) after Sep 6, the hydraulic jack piston motion moves; Rod-pulling type displacement transducer (201) exports signal to automatic stretch-draw control system controller (3); Automatically stretch-draw control system controller (3) is handled signal after data window machine controller (4) is transferred to computer (5), on the screen of computer (5), shows displacement in real time;
Sep 7, go up input working parameter at computer (5), stretch-draw control system controller (3) receives and be hydraulic jack (2) pressurization by the running parameter control step motor (101) of input automatically, makes hydraulic jack (2) completion stretching process;
Sep 8, after accomplishing stretching process, get into the off-load process;
Sep 9, rod-pulling type displacement transducer (201) make zero, and promptly accomplish the single tension process.
6. automatic stretching control method according to claim 5 is characterized in that: in step Sep 7, the said running parameter of upward importing at computer (5) is predefined serial oil pressure parameter value; Described automatic stretch-draw control system controller (3) is hydraulic jack (2) pressurization by the running parameter control step motor (101) of input; Make the particular content of hydraulic jack (2) completion stretch-draw work following: stretch-draw control system controller (3) No. 1 stepper motor of control (1011) clockwise rotates automatically; When the detected oil pressure of the pressure sensor that is positioned at the hydraulic jack oil-in (202) reaches predefined minimum oil pressure parameter value; No. 1 stepper motor (1011) stops operating automatically; And the time of maintenance setting, write down the displacement of this moment on the computer automatically; No. 1 stepper motor (1011) begins again to clockwise rotate then; When the pressure sensor that is positioned at the hydraulic jack oil-in (202) detects oil pressure and reaches predefined next oil pressure parameter value; No. 1 stepper motor (1011) stops operating again automatically; And the time of maintenance setting, write down the displacement of this moment on the computer automatically; No. 1 stepper motor (1011) carries out work according to this, reaches predefined maximum oil pressure parameter value until oil pressure, and keeps the time of setting, and at this moment, hydraulic pressure hydraulic jack (2) is accomplished stretching process.
7. according to claim 5 or 6 described automatic stretching control methods, it is characterized in that: in step Sep 8, described entering off-load process particular content is following: No. 1, No. 2 stepper motor rotates counterclockwise and forwards in the time of can not rotating and stops automatically; After No. 1, No. 2 stepper motor stopped, No. 3 stepper motors (1013) began to clockwise rotate up to forwarding in the time of can not rotating and stop automatically; No. 3 stepper motors (1013) are when stopping, and No. 4 stepper motors (1014) begin to clockwise rotate, and stop operating automatically in the time of till can not rotating; The pressure sensor (202) that is positioned at the hydraulic jack oil return opening detects backhaul pressure and is presented on the screen of computer (5), and when backhaul pressure during greater than 25MPa, red eye begins glittering, and No. 4 stepper motors (1014) stop automatically; Whether the rod-pulling type displacement transducer detects and makes zero in this process, as makes zero, and No. 4 stepper motors (1014) stop automatically; Promptly be that pressure sensor (202) and the rod-pulling type displacement transducer that is positioned at the hydraulic jack oil return opening detects simultaneously, which reaches the condition of setting earlier, and which just sends the signal that stops to No. 4 stepper motors (1014); No. 4 stepper motors (1014) stop operating, and accomplish the off-load process.
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