CN102953550B - Manual-automatic integrated tensioning system - Google Patents
Manual-automatic integrated tensioning system Download PDFInfo
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- CN102953550B CN102953550B CN201210372218.0A CN201210372218A CN102953550B CN 102953550 B CN102953550 B CN 102953550B CN 201210372218 A CN201210372218 A CN 201210372218A CN 102953550 B CN102953550 B CN 102953550B
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Abstract
The invention discloses a manual-automatic integrated tensioning system comprising a hydraulic oil cylinder jack, a hydraulic system, a control cabinet, a manual-automatic switching circuit and a sensor group, wherein the hydraulic system comprises an oil tank, a hydraulic pump, a motor, a variable frequency control system and a servo proportional control system; the variable frequency control system comprises a frequency converter for controlling the rotating speed of the motor; the servo proportional control system comprises a servo proportional valve arranged between the hydraulic pump and the hydraulic oil cylinder jack; a hydraulic control one-way valve is arranged between the servo proportional valve and the hydraulic oil cylinder jack; an unloading control bypass is arranged between the hydraulic control one-way valve and the servo proportional valve; an electromagnetic valve and a controllable unloading device are arranged on the unloading control bypass; a central processing system, an execution control system connected with the central processing system and a communication module connected with the execution control system are arranged in the control cabinet; and a data wire interface and/or a radio station are/is arranged on the communication module.
Description
Technical field
The invention belongs to Construction of Civil Engineering equipment technical field, concrete is a kind of manual-automatic integrated tensioning system for prestressed stretch-draw.
Background technology
Prestressing technique is used widely in civil engineering.According to the preliminary statistics, ended for the end of the year 2011, highway in China bridge reaches 68.94 ten thousand, 3349.44 myriametres, wherein adopts the bridge engineering of prestressed structure to account for the more than 90% of total amount.Meanwhile, prestressing technique has become in large span, large spatial structure, tall and slender structure, heavy structure, unique construction and new structure engineering an indispensable technical development to a plurality of fields such as graded crossing building, ocean structure, atomic reactor container and extraordinary labyrinths.
But meanwhile, due to the impact of various factors, Partial Bridges structure construction is of poor quality, causes construction and use Bridge cave-in accident to happen occasionally.In recent years, the quality accident causing due to prestressing force reason occurs again and again, disturbs, ftractures under as serious in beam body, even collapses.
Prestressed stretch-draw is the critical process of prestress engineering.In current field of civil engineering, what tensioning construction generally adopted is the tensioning system that oil pump and jack form, main " the dual control method " that adopts tensile load control, stretch value to check, roughly can be summarized as following key link: oil pressure gauge control load, manual operation oil pump; Invar tape is measured elongation, propagandas directed to communicate and keeps synchronous; Manual record data, check after construction.There is many defects in this traditional prestressing force drawing process, as more extensive in stretch-draw operation, loss of prestress is larger, is difficult to realize synchronous tension, can not scent a hidden danger in time etc.Visible, the prestress control precision of traditional stretch-draw is lower, execution control difficulty is large, efficiency of construction is lower, is difficult to guarantee construction quality and the operation security of engineering, has become the key factor of restriction prestressed structure application and development.
Since late 1980s, some researchers have started the research of strain-pull controlling of prestress problem, from the research angle of automation, information-aided construction and the Digital Control angle of oil pump, have carried out a large amount of research work, in succession bear first fruit.Manual-automatic integrated tensioning system is integrated on civil engineering product of prestressing technique, advanced manufacturing technology, information technology and intellectual technology and merges, the automation that has embodied prestressed Construction Technology with intelligent, become more meticulous and informationalized development trend.
Given this, the present invention is intended to explore a kind of manual-automatic integrated tensioning system, this manual-automatic integrated tensioning system not only can be realized the control of manual and automatic two kinds of patterns of stretching process, and can also accurately control prestressed off-load process, can guarantee that the prestressing force finally obtaining reaches designing requirement.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of manual-automatic integrated tensioning system, this manual-automatic integrated tensioning system not only can be realized the control of manual and automatic two kinds of patterns of stretching process, and can also accurately control prestressed off-load process, can guarantee that the prestressing force finally obtaining reaches designing requirement.
Realize above-mentioned technical purpose, manual-automatic integrated tensioning system of the present invention, comprises hydraulic jack jack, for driving the hydraulic system of hydraulic jack jack and for controlling the control cabinet of hydraulic jack jack action;
Described hydraulic system comprises fuel tank, hydraulic pump, motor, frequency-changing control system and servo ratio control system, described frequency-changing control system comprises for controlling motor speed and making the converter plant of hydraulic jack jack rapid loading, described servo ratio control system comprises the servo proportion that is arranged between described hydraulic pump and described hydraulic jack jack and loads for hydraulic jack jack precise fine-adjustment, between described servo proportion and hydraulic jack jack, be provided with hydraulic control one-way valve, between described hydraulic control one-way valve and described servo proportion, be provided with off-load and control bypass, described off-load is controlled bypass and is provided with electromagnetic valve and controlled relief arrangement,
Also comprise hand-from change-over circuit, described fuel tank is provided with hand-control panel, and described hand-control panel is provided with hand for switching manual mode-automatic mode-from changeover switch and for controlling button or the knob of described servo proportion, hydraulic control one-way valve, electromagnetic valve and motor;
Also comprise sensor group, described sensor group comprises and being arranged on described hydraulic jack jack and for measuring the displacement transducer of hydraulic jack jack piston rod stroke, and is arranged between described hydraulic control one-way valve and hydraulic jack jack or is arranged on hydraulic jack jack and for detection of the pressure sensor of hydraulic jack jack pressure;
In control cabinet, be provided with central processing system and the executive control system being connected with central processing system, in executive control system, be provided with for exporting the control output unit of control signal and for the data acquisition unit of pick-up transducers group survey data;
In described control cabinet, be also provided with the communication module being connected with described executive control system, described communication module is provided with for other control cabinet group-net communications or for access data network or for accessing data line interface and/or the radio station of Internet of Things.
Further, described controlled relief arrangement comprises that being arranged on described off-load controls throttling arrangement and the one way valve in bypass, and described one way valve is connected with described hydraulic pump.
Further, described controlled relief arrangement comprises self-adjustable variable throttler, described self-adjustable variable throttler comprises valve body, in described valve body, be provided with pressure balance chamber and go out oil pocket, described pressure balance chamber and go out to be respectively equipped with oil-in on oil pocket, describedly go out in oil pocket to be provided with oil-out, in described pressure balance chamber, be provided with spool, described spool is provided with to extend and penetrates out oil pocket and coordinate with oil-out for adjusting the push rod of hydraulic fluid port flow, is set with the spring acting on spool and pressure balance chamber wall on described push rod.
Further, between described hydraulic pump and servo proportion, be provided with overflow bypass, the radiator that described overflow bypass is provided with overflow valve and dispels the heat for hydraulic oil in fuel tank.
Further, described sensor group also comprises and being arranged in described hydraulic system and for detection of the pressure sensor II of described hydraulic system working pressure, described pressure sensor II is arranged on described off-load and controls in bypass or be arranged between described servo proportion and hydraulic control one-way valve.
Further, in described control cabinet, be also provided with the read-only storage connected with central processing system and/or the interface for being connected with mobile memory.
Further, on described control cabinet, be also provided with touch-screen, liquid crystal display and the switch module for man-machine interaction.
Further, described fuel tank is provided with wiring hole, described control cabinet is provided with interface board, and described control output unit is connected with the valve group of described hydraulic system with wiring hole by interface board, and described data acquisition unit is connected with described sensor group with wiring hole by interface board.
Further, described servo proportion oil-in and off-load are controlled in bypass and are equipped with shock-proof pressure gauge.
Further, also comprise go-cart, described go-cart is provided with for the installation station of described fuel tank and described hydraulic jack jack is installed.
Further, described hand-comprise conditioning and translation circuit, hand automatic switching circuit, drive circuit and relay group from change-over circuit; Described conditioning and translation circuit receive from the signal of executive control system and to this signal and nurse one's health and convert input automatic switching circuit in one's hands, described hand automatic switching circuit is at described hand-after changing under the effect of changeover switch, and being input to drive circuit, described drive circuit is connected with relay group.
Beneficial effect of the present invention is:
1, manual-automatic integrated tensioning system of the present invention can be controlled the action of hydraulic jack jack automatically by control cabinet, by hand-from change-over circuit is set, and hand-control panel is set on fuel tank, can switch easily manual mode and automatic mode, be convenient to Field Force and according to actual conditions, initiatively get involved the control of prestressed stretch-draw, avoid the generation of emergency.
2, by servo proportion, can control the oil-feed of hydraulic jack jack and fuel-displaced speed, can control in real time hydraulic jack jack and export prestressed size, the prestressing force of hydraulic jack jack output is exported according to default prestressed stretch-draw curve.
3, by being set, frequency-changing control system controls motor speed, reach and drive hydraulic pump output different flow to control unloaded hydraulic jack jack piston stretching speed, and power output size and the speed of hydraulic jack jack during loaded work piece, reach the object of rapid loading; The Hydraulic Station output flow of existing prestressing force pull system is generally 2-4L/min, be only applicable to centre-hole jack, when adopting large tank jack, the problems such as its loading velocity is slow, oil return is slow will affect efficiency of construction, and manual-automatic integrated tensioning system of the present invention is controlled motor speed by converter plant is set, can adapt to various types of cylinder jacks, applicability is wider, and can improve the efficiency of the engineering constructions such as stretch-draw and jacking;
At hydraulic jack jack, rely on variable frequency control to reach after the coarse adjustment stretching force value of setting, central processing unit is controlled motor speed by coordination frequency-changing control system and is taken ratio control system control servo proportion openings of sizes with private and carry out vernier control, steadily Slow loading is to setting stretching force value, and control the inner fluid of auto-compensation jack to reveal the pressure loss of bringing by the self compensation of hydraulic jack jack pressure, realize and hold the maintenance of lotus pressure stability;
Be that manual-automatic integrated tensioning system of the present invention can be realized F.F. and fine setting use, adapt to the low pressure rapid loading of different stretch-draw piston area hydraulic jack jack from big to small, high pressure is slowly accurately controlled, and guarantees system construction efficiency and control accuracy; By variable frequency control and servo ratio, control combination, when rapid loading loads with large flow, rely on frequency conversion to carry out coarse adjustment control and reach coarse adjustment pre set force value, and then by servo ratio, control to finely tune accurately to reach and set stretching force value, system heat waste is little, and energy-saving effect is remarkable.
4, prior art adopts the pressure loss while holding lotus to carry out repairing over starter motor after necessarily setting value mostly, with compensation fluid, reveal, but such process can cause the fluctuation of hydraulic system oil liquid, namely when opening motor when holding lotus force value, compensate, but after overcompensation, be accurately to control to setting value, can under pressure oscillation effect, surpass setting value; And manual-automatic integrated tensioning system of the present invention is controlled motor and servo proportion by Sustainable Control holding the lotus stage, can be because of opening and closing and build-up of pressure fluctuation suddenly.
5, by being set, off-load controls bypass, by controlling controlled relief arrangement, can accurately control the unloding speed of hydraulic jack jack, make hydraulic jack jack carry out off-load according to default unloading curve, prevent from, because the off-load of hydraulic jack jack is uncontrollable or off-load causes presstressed reinforcing steel to shrink long defect too soon, making the prestressing force being finally applied on presstressed reinforcing steel reach design load.
6, manual-automatic integrated tensioning system of the present invention is by arranging central processing system and executive control system two-level processing system, central processing system is connected for the background process of non real-time control data and for parts such as the touch-screen with man-machine interaction and liquid crystal displays, executive control system also receives the survey data from sensor group for the valve group of real-time control hydraulic system, and control response is more quick and accurate; By sharing out the work and helping one another of central processing system and executive control system two-level processing system, can make to control more fast, accurately prestressing force output procedure and the off-load process of hydraulic jack jack, guarantee that manual-automatic integrated tensioning system can carry out work according to the operating mode of default prestressing force curve of output and unloading curve regulation.
Accompanying drawing explanation
Fig. 1 is the structural representation of manual-automatic integrated tensioning system embodiment of the present invention;
Fig. 2 is the top view of Fig. 1 a;
Fig. 3 is hydraulic system principle figure;
Fig. 4 is the first implementation structural representation of controlled relief arrangement;
Fig. 5 is the second implementation structural representation of controlled relief arrangement;
Fig. 6 is control system theory diagram;
Fig. 7 is hand-from the theory diagram of translation interface;
Fig. 8 is the control principle block diagram of the present embodiment manual-automatic integrated tensioning system.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As depicted in figs. 1 and 2, be the structural representation of manual-automatic integrated tensioning system embodiment of the present invention.The manual-automatic integrated tensioning system of the present embodiment, comprises hydraulic jack jack 1, for driving the hydraulic system of hydraulic jack jack 1 action and for controlling the control cabinet of hydraulic jack jack 1 action.
As shown in Figure 3, hydraulic system comprises fuel tank 2, hydraulic pump 4, motor 3, frequency-changing control system and servo ratio control system, frequency-changing control system comprises for controlling motor 3 rotating speeds and making the converter plant 26 of hydraulic jack jack 1 rapid loading, servo ratio control system comprises the servo proportion 5 that is arranged between hydraulic pump 4 and hydraulic jack jack 1 and loads for hydraulic jack jack 1 precise fine-adjustment, between servo proportion 5 and hydraulic jack jack 1, be provided with hydraulic control one-way valve 6, between hydraulic control one-way valve 6 and servo proportion 5, be provided with off-load and control bypass, off-load is controlled bypass and is provided with electromagnetic valve 7 and controlled relief arrangement 8.The hydraulic control one-way valve 6 of the present embodiment is arranged on the oil circuit between servo proportion 5 and hydraulic jack jack 1 rodless cavity, and the control piper of hydraulic control one-way valve 6 is connected with hydraulic jack jack 1 rod chamber.
By servo proportion 5, can control 1 oil-feed of hydraulic jack jack and fuel-displaced speed, can control in real time hydraulic jack jack and export prestressed size, the prestressing force of hydraulic jack jack 1 output is exported according to default prestressed stretch-draw curve.
By this controlled relief arrangement 8, can adapt to automatically the speed that pressure size regulates release, avoided the direct release of dependence electromagnetic valve of mentioning in traditional manual release mode and other documents or directly adopted the fixedly mode of damping hole release, according to the large I of pressure, automatically regulate off-load velocity magnitude, realize slow off-load and anchoring, reduce the effective prestress loss of anchoring stage.
The manual-automatic integrated tensioning system of the present embodiment also comprises hand-from change-over circuit, hand-in change-over circuit can be arranged on fuel tank 2, also can be arranged in control cabinet, the hand of the present embodiment-in change-over circuit is arranged on fuel tank 2, and fuel tank 2 is provided with hand-control panel 16, hand-control panel 16 is provided with hand for switching manual mode-automatic mode-from changeover switch and for controlling button or the knob of control valve group and motor 3.
As shown in Figure 7, be hand-from the theory diagram of change-over circuit, the hand of the present embodiment-comprise conditioning and translation circuit, hand automatic switching circuit, drive circuit and relay group from change-over circuit; Conditioning receives from the signal of executive control system and input automatic switching circuit in one's hands is nursed one's health and converted to this signal with translation circuit, hand automatic switching circuit is at described hand-after changing under the effect of changeover switch, and being input to drive circuit, drive circuit is connected with relay group.By hand-from change-over circuit is set, can conveniently carry out the conversion of manual mode-automatic mode according to actual conditions, control model is more flexible.By hand-from change-over circuit is set, and hand-control panel 16 is set on fuel tank 2, can switches easily manual mode and automatic mode, be convenient to Field Force and according to actual conditions, initiatively get involved the control of prestressed stretch-draw, avoid the generation of emergency.
The manual-automatic integrated tensioning system of the present embodiment also comprises sensor group, sensor group comprises and is arranged on hydraulic jack jack 1 and for measuring the displacement transducer of hydraulic jack jack 1 piston rod stroke, and be arranged between hydraulic control one-way valve 6 and hydraulic jack jack 1 or on hydraulic jack jack 1 and for detection of the pressure sensor of hydraulic jack jack 1 pressure, the pressure sensor of the present embodiment is arranged on hydraulic jack jack 1, by sensor group is set, can monitor in real time the operating mode of hydraulic jack jack 1.Preferably, sensor group also comprises and being arranged in hydraulic system and for detection of the pressure sensor II 9 of hydraulic system working pressure, pressure sensor II 9 is arranged on off-load and controls in bypass or be arranged between servo proportion 5 and hydraulic control one-way valve 6, the pressure sensor II 9 of the present embodiment is arranged on off-load and controls in bypass, and between electromagnetic valve 7 and hydraulic control one-way valve 6.
As shown in Figure 6, in control cabinet, be provided with central processing system and the executive control system being connected with central processing system, in executive control system, be provided with for exporting the control output unit of control signal and for the data acquisition unit of pick-up transducers group survey data.Control output unit and be connected with servo proportion 5, electromagnetic valve 7 and controlled relief arrangement 8, realize the real-time control to servo proportion 5, electromagnetic valve 7 and controlled relief arrangement 8 operating modes; Data acquisition unit is connected with displacement transducer, pressure sensor and pressure sensor II 9, the hydraulic jack jack 1 piston rod telescopic displacement, hydraulic jack jack 1 operating pressure being measured by pressure sensor and the hydraulic system working pressure being measured by pressure sensor II 9 that can Real-time Collection by displacement sensor, be measured, and carry out data feedback to executive control system, and by executive control system, controlled the operating mode of control valve group and motor 3.Preferably, the central processing system of the present embodiment adopts central processing unit.
In the control cabinet of the present embodiment, be also provided with the communication module being connected with executive control system, communication module is provided with for other control cabinet group-net communications or for access data network or for accessing data line interface and/or the radio station of Internet of Things, in the communication module of the present embodiment, be provided with data line interface and radio station simultaneously, can carry out wired and radio communication with other communication equipments, conveniently carry out transfer of data simultaneously.Preferably, be also provided with touch-screen, liquid crystal display and switch module for man-machine interaction on control cabinet, operating personnel can be carried out Real Time Observation and control in real time stretching process by touch-screen and liquid crystal display.Preferably, in control cabinet, be also provided with the read-only storage connected with central processing system and/or the interface for being connected with mobile memory, in the control cabinet of the present embodiment, be provided with read-only storage and interface for being connected with mobile memory simultaneously, by read-only storage being set for storing the data of prestressed stretch-draw process, and be connected with mobile memory by interface, the data that are stored in read-only storage are backed up.
Manual-automatic integrated tensioning system of the present invention is by arranging central processing system and executive control system two-level processing system, central processing system is connected for the background process of non real-time control data and for parts such as the touch-screen with man-machine interaction and liquid crystal displays, executive control system also receives the survey data from sensor group for the valve group of real-time control hydraulic system, and control response is more quick and accurate; By sharing out the work and helping one another of central processing system and executive control system two-level processing system, can make to control more fast, accurately prestressing force output procedure and the off-load process of hydraulic jack jack, guarantee that manual-automatic integrated tensioning system can carry out work according to the operating mode of default prestressing force curve of output and unloading curve regulation.
The manual-automatic integrated automatic Tensioning system of the present embodiment is controlled motor 3 rotating speeds by frequency-changing control system is set, reach and drive hydraulic pump 4 output different flows to control unloaded hydraulic jack jack 1 piston stretching speed, and power output size and the speed of hydraulic jack jack 1 during loaded work piece, reach the object of rapid loading.The Hydraulic Station output flow of existing prestressing force pull system is generally 2-4L/min, be only applicable to centre-hole jack, when adopting large tank jack, the problems such as its loading velocity is slow, oil return is slow will affect efficiency of construction, and the manual-automatic integrated tensioning system of the present embodiment is controlled motor 3 rotating speeds by converter plant is set, can adapt to various types of cylinder jacks 1, applicability is wider, and can improve the efficiency of the engineering constructions such as stretch-draw and jacking.
At hydraulic jack jack 1, rely on variable frequency control to reach after the coarse adjustment stretching force value of setting, central processing unit is controlled motor speed by coordination frequency-changing control system and is taken ratio control system control servo proportion openings of sizes with private and carry out vernier control, steadily Slow loading is to setting stretching force value, and control the inner fluid of auto-compensation jack to reveal the pressure loss of bringing by the self compensation of hydraulic jack jack pressure, realize and hold the maintenance of lotus pressure stability.
The manual-automatic integrated tensioning system that is the present embodiment can be realized F.F. and fine setting use, adapts to the low pressure rapid loading of different stretch-draw piston area hydraulic jack jack from big to small, and high pressure is slowly accurately controlled, and guarantees system construction efficiency and control accuracy; By variable frequency control and servo ratio, control combination, when rapid loading loads with large flow, rely on frequency conversion to carry out coarse adjustment control and reach coarse adjustment pre set force value, and then by servo ratio, control to finely tune accurately to reach and set stretching force value, system heat waste is little, and energy-saving effect is remarkable.
Prior art adopts the pressure loss while holding lotus to carry out repairing over starter motor 3 after necessarily setting value mostly, with compensation fluid, reveal, but such process can cause the fluctuation of hydraulic system oil liquid, namely when opening motor when holding lotus force value, compensate, but after overcompensation, be accurately to control to setting value, can under pressure oscillation effect, surpass setting value; And the manual-automatic integrated tensioning system of the present embodiment is controlled motor 3 and servo proportion 5 by Sustainable Control holding the lotus stage, can be because of opening and closing and build-up of pressure fluctuation suddenly.
Controlled relief arrangement 8 can adopt implemented in many forms, as follows:
As shown in Figure 4, the first implementation for controlled relief arrangement 8, this controlled relief arrangement comprises self-adjustable variable throttler, self-adjustable variable throttler comprises valve body 17, in valve body 17, be provided with pressure balance chamber 18 and go out oil pocket 19, pressure balance chamber 18 and go out to be respectively equipped with oil inlet P 1 and oil inlet P 2 on oil pocket 19, go out and in oil pocket 19, be provided with oil-out 20, in pressure balance chamber 18, be provided with spool 21, spool 21 is provided with to extend and penetrates out oil pocket 19 and coordinate with oil-out 20 for adjusting the push rod 22 of hydraulic fluid port flow, on push rod 22, be set with the spring 23 acting on spool 21 and pressure balance chamber wall.
Existing relief arrangement adopts fixedly damping hole to carry out off-load conventionally, but fixedly damping restriction choke cannot be adjusted off-load speed, slows down if off-load speed and adopts too small damping hole simultaneously, easily stops up damping hole, and the equipment that affects is normally used.This self-adjustable variable throttler is by passing into the pressure oil of uniform pressure in oil inlet P 1 and oil inlet P 2, pressure oil acts on spool 21 through oil inlet P 1, pressure balance chamber 18 relies on spring 23 to carry out balance with the differential pressure action force that spendes oil pocket 19, and then by the size of push rod 22 control oil-outs 20, oil-out 20 is bell, push rod front end is provided with the pyramidal structure coordinating with oil-out 20, the size of controlling bell can be controlled the liquid resistance of release annulus, make the pressure decreased of the pressure oil that enters from oil inlet P 2, reach the effect of automatic control pressure unloading speed, realization is slow off-load when high pressure, off-load function rapidly during low pressure.
By this controlled relief arrangement 8, can adapt to automatically the speed that pressure size regulates release, avoided the direct release of dependence electromagnetic valve of mentioning in traditional manual release mode and other documents or directly adopted the fixedly mode of damping hole release, according to the large I of pressure, automatically regulate off-load velocity magnitude, realize slow off-load and anchoring, reduce the effective prestress loss of anchoring stage.
As shown in Figure 5, be the second implementation of controlled relief arrangement 8, this controlled relief arrangement 8 comprises that being arranged on off-load controls throttling arrangement 24 and the one way valve 25 in bypass, one way valve 25 is connected with hydraulic pump 4.Throttling arrangement 24 and the one way valve 25 of the present embodiment become one, by oil circuit in integrated valve block, be communicated with servo proportion 5 oil circuits, when carrying out off-load, pressure is got back to fuel tank by throttling arrangement 24 and one way valve 25, can realize slow off-load, and can carry out the adjustment of off-load speed to different tonnage jack and control by adjusting different Restriction Parameters, reach the object that off-load is controlled.
The controlled relief arrangement 8 of the present embodiment adopts the first implementation, be that controlled relief arrangement 8 adopts, self-adjustable variable throttler, gets back to fuel tank 2 through the pressure oil of self-adjustable variable throttler off-load through high-voltage electromagnetic ball valve, can adapt to automatically the speed that pressure size regulates release.
Preferred version as the present embodiment, between hydraulic pump 4 and servo proportion 5, be provided with overflow bypass, the radiator 11 that overflow bypass is provided with overflow valve 10 and dispels the heat for the interior hydraulic oil of fuel tank 2, can prevent the analysis of hydraulic oil overheat in fuel tank 2 by radiator 11 is set.
Preferred version as the present embodiment, fuel tank 2 is provided with wiring hole 12, control cabinet is provided with interface board, controlling output unit is connected with the valve group of hydraulic system with wiring hole 12 by interface board, data acquisition unit is connected with sensor group with wiring hole 12 by interface board, connects convenient reliable.Preferably, servo proportion 5 oil-ins and off-load are controlled in bypass and are respectively equipped with shock-proof pressure gauge 13 and shock-proof pressure gauge 14, the dial plate of shock-proof pressure gauge 13 and shock-proof pressure gauge 14 is arranged on hand-control panel 16, conveniently at the construction field (site) stretching process is observed and is monitored.
The manual-automatic integrated tensioning system of the present embodiment also comprises go-cart 15, and go-cart 15 is provided with for the installation station of fuel tank 2 and hydraulic jack jack 1 is installed, and by go-cart 15 is set, can facilitate mobile fuel tank 2 and hydraulic jack jack 1.
As shown in Figure 8, for the manual-automatic integrated tensioning system of the present embodiment, its executive control system is by controlling output unit to control valve group and the converter plant output control signal of executing agency, control valve group comprises servo proportion 5, electromagnetic valve 7 and controlled relief arrangement 8, in executing agency by displacement transducer, the sensor group that pressure sensor and pressure sensor II 9 form is to the floor data of the data acquisition unit feedback valve group of executive control system, executive control system is made next step real-time control output judgement according to floor data, control the valve group that output unit outputs a control signal to executing agency, so form a close loop control circuit.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (11)
1. a manual-automatic integrated tensioning system, is characterized in that: comprise hydraulic jack jack, for driving the hydraulic system of hydraulic jack jack and for controlling the control cabinet of hydraulic jack jack action;
Described hydraulic system comprises fuel tank, hydraulic pump, motor, frequency-changing control system and servo ratio control system, described frequency-changing control system comprises for controlling motor speed and making the converter plant of hydraulic jack jack rapid loading, described servo ratio control system comprises the servo proportion that is arranged between described hydraulic pump and described hydraulic jack jack and loads for hydraulic jack jack precise fine-adjustment, between described servo proportion and hydraulic jack jack, be provided with hydraulic control one-way valve, between described hydraulic control one-way valve and described servo proportion, be provided with off-load and control bypass, described off-load is controlled bypass and is provided with electromagnetic valve and controlled relief arrangement,
Also comprise hand-from change-over circuit, described fuel tank is provided with hand-control panel, and described hand-control panel is provided with hand for switching manual mode-automatic mode-from changeover switch and for controlling button or the knob of described servo proportion, hydraulic control one-way valve, electromagnetic valve and motor;
Also comprise sensor group, described sensor group comprises and being arranged on described hydraulic jack jack and for measuring the displacement transducer of hydraulic jack jack piston rod stroke, and is arranged between described hydraulic control one-way valve and hydraulic jack jack or is arranged on hydraulic jack jack and for detection of the pressure sensor of hydraulic jack jack pressure;
In control cabinet, be provided with central processing system and the executive control system being connected with central processing system, in executive control system, be provided with for exporting the control output unit of control signal and for the data acquisition unit of pick-up transducers group survey data;
In described control cabinet, be also provided with the communication module being connected with described executive control system, described communication module is provided with for other control cabinet group-net communications or for access data network or for accessing data line interface and/or the radio station of Internet of Things.
2. manual-automatic integrated tensioning system according to claim 1, is characterized in that: described controlled relief arrangement comprises that being arranged on described off-load controls throttling arrangement and the one way valve in bypass, and described one way valve is connected with described hydraulic pump.
3. manual-automatic integrated tensioning system according to claim 1, it is characterized in that: described controlled relief arrangement comprises self-adjustable variable throttler, described self-adjustable variable throttler comprises valve body, in described valve body, be provided with pressure balance chamber and go out oil pocket, described pressure balance chamber and go out to be respectively equipped with oil-in on oil pocket, describedly go out in oil pocket to be provided with oil-out, in described pressure balance chamber, be provided with spool, described spool is provided with to extend and penetrates out oil pocket and coordinate with oil-out for adjusting the push rod of hydraulic fluid port flow, on described push rod, be set with the spring acting on spool and pressure balance chamber wall.
4. according to the manual-automatic integrated tensioning system described in claim 1 any one, it is characterized in that: between described hydraulic pump and servo proportion, be provided with overflow bypass, the radiator that described overflow bypass is provided with overflow valve and dispels the heat for hydraulic oil in fuel tank.
5. manual-automatic integrated tensioning system according to claim 1, it is characterized in that: described sensor group also comprises and being arranged in described hydraulic system and for detection of the pressure sensor II of described hydraulic system working pressure, described pressure sensor II is arranged on described off-load and controls in bypass or be arranged between described servo proportion and hydraulic control one-way valve.
6. according to the manual-automatic integrated tensioning system described in claim 1-5 any one, it is characterized in that: in described control cabinet, be also provided with the read-only storage connected with central processing system and/or the interface for being connected with mobile memory.
7. manual-automatic integrated tensioning system according to claim 6, is characterized in that: on described control cabinet, be also provided with touch-screen, liquid crystal display and switch module for man-machine interaction.
8. manual-automatic integrated tensioning system according to claim 7, it is characterized in that: described fuel tank is provided with wiring hole, described control cabinet is provided with interface board, described control output unit is connected with the valve group of described hydraulic system with wiring hole by interface board, and described data acquisition unit is connected with described sensor group with wiring hole by interface board.
9. manual-automatic integrated tensioning system according to claim 1, is characterized in that: described servo proportion oil-in and off-load are controlled in bypass and be equipped with shock-proof pressure gauge.
10. manual-automatic integrated tensioning system according to claim 1, is characterized in that: also comprise go-cart, described go-cart is provided with for the installation station of described fuel tank and described hydraulic jack jack is installed.
11. manual-automatic integrated tensioning systems according to claim 1, is characterized in that: described hand-comprise conditioning and translation circuit, hand automatic switching circuit, drive circuit and relay group from change-over circuit; Described conditioning and translation circuit receive from the signal of executive control system and to this signal and nurse one's health and convert input automatic switching circuit in one's hands, described hand automatic switching circuit is at described hand-after changing under the effect of changeover switch, and being input to drive circuit, described drive circuit is connected with relay group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210372218.0A CN102953550B (en) | 2012-09-29 | 2012-09-29 | Manual-automatic integrated tensioning system |
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| CN201210372218.0A CN102953550B (en) | 2012-09-29 | 2012-09-29 | Manual-automatic integrated tensioning system |
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| CN103629173B (en) * | 2013-11-28 | 2015-12-02 | 湖南联智桥隧技术有限公司 | Prestressed stretch-draw hydraulic system, prestress tensioning equipment and controlling method thereof |
| CN106284090B (en) * | 2016-08-31 | 2018-01-19 | 中国一冶集团有限公司 | Prestressed stretch-draw chassis |
| CN111288030B (en) * | 2020-03-31 | 2021-11-16 | 扬州翊翔航空科技有限公司 | Distributed damping supporting device of automobile range extender and control method thereof |
| CN113790182B (en) * | 2021-09-22 | 2024-04-19 | 湖南星邦智能装备股份有限公司 | Arm support dead weight retraction control system and control method |
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| JPH06347357A (en) * | 1993-06-03 | 1994-12-22 | Nippon Concrete Ind Co Ltd | Hydraulic tensioning apparatus |
| CN201181418Y (en) * | 2008-04-22 | 2009-01-14 | 中国水利水电第七工程局成都水电建设工程有限公司 | Anchor cable stretching automatic monitoring system |
| CN101476574A (en) * | 2009-01-16 | 2009-07-08 | 福州恒拓工业自动化有限公司 | Automatic control mechanism for combined valve of reinforced bar stretching machine hydraulic equipment |
| CN101989091A (en) * | 2009-07-31 | 2011-03-23 | 中国建筑第八工程局有限公司 | Prestress automatic tensioning control system and method |
| CN202227706U (en) * | 2011-09-16 | 2012-05-23 | 柳州市建桥预应力机械厂 | Automatic tensioning control system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06347357A (en) * | 1993-06-03 | 1994-12-22 | Nippon Concrete Ind Co Ltd | Hydraulic tensioning apparatus |
| CN201181418Y (en) * | 2008-04-22 | 2009-01-14 | 中国水利水电第七工程局成都水电建设工程有限公司 | Anchor cable stretching automatic monitoring system |
| CN101476574A (en) * | 2009-01-16 | 2009-07-08 | 福州恒拓工业自动化有限公司 | Automatic control mechanism for combined valve of reinforced bar stretching machine hydraulic equipment |
| CN101989091A (en) * | 2009-07-31 | 2011-03-23 | 中国建筑第八工程局有限公司 | Prestress automatic tensioning control system and method |
| CN202227706U (en) * | 2011-09-16 | 2012-05-23 | 柳州市建桥预应力机械厂 | Automatic tensioning control system |
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