CN205348806U - One drags two prestressing force intelligence stretch -draw hydraulic means - Google Patents
One drags two prestressing force intelligence stretch -draw hydraulic means Download PDFInfo
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- CN205348806U CN205348806U CN201620098858.0U CN201620098858U CN205348806U CN 205348806 U CN205348806 U CN 205348806U CN 201620098858 U CN201620098858 U CN 201620098858U CN 205348806 U CN205348806 U CN 205348806U
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Abstract
The utility model relates to an one drags two prestressing force intelligence stretch -draw hydraulic means, including converter, motor, oil pump, hydraulic tank, jack, displacement sensor, pressure sensor, three -position four -way electromagnetic valve, hydraulic pressure lock, off -load solenoid valve and controller, the input of converter and motor links to each other, and the output of motor links to each other with the oil pump, is equipped with an oil inlet and two oil -outs on the oil pump, and the oil inlet and the hydraulic tank of oil pump are linked together, and two oil -outs of oil pump are equallyd divide and do not pass through corresponding being connected with two jack of oil circuit pipe, equallys divide on the piston rod of two jack do not to be equipped with displacement sensor, equallys divide in the epicoele of two jack and the cavity of resorption do not to be equipped with a pressure sensor, it do not is equipped with three -position four -way electromagnetic valve, hydraulic pressure lock and off -load solenoid valve to equally divide on two oil circuit pipes on the oil pump oil -out. The utility model discloses make full use of two jack of two independent oil -out simultaneous controls of oil pump, simple structure controls effectually.
Description
Technical field
This utility model relates to a kind of hydraulic means, is specifically related to a kind of one drag two prestressing force intelligent tensioning hydraulic means.
Background technology
Prestressing force intelligent tensioning system railway at home and highway bridge construction have begun to progressively promote, but, the hydraulic means in prestressing force intelligent tensioning system, electric-control system and software system do not have unified standard, and the final performance difference caused is also very big.Existing one drag two prestressing force intelligent tensioning hydraulic means can only achieve one jack of an oil pump control, and structure is complicated, control weak effect, and reliability is low.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of one drag two prestressing force intelligent tensioning hydraulic means, it is possible to achieve two jack of an oil pump control, and simple in construction controls effective.
The technical scheme that this utility model solves above-mentioned technical problem is as follows: a kind of one drag two prestressing force intelligent tensioning hydraulic means, including converter, motor, oil pump, hydraulic oil container, jack, displacement transducer, pressure transducer, three position four-way electromagnetic valve, hydraulic lock, off-load electromagnetic valve and controller；
Described converter is connected with the input of described motor, the outfan of described motor is connected with described oil pump, described oil pump is provided with an oil-in and two oil-outs, the oil-in of described oil pump is connected with described hydraulic oil container, two oil-outs of described oil pump are respectively by corresponding being connected with two described jack of oil-way pipe, the piston rod of two described jack is provided with displacement transducer respectively, the epicoele of two described jack and cavity of resorption are provided with a pressure transducer respectively；
Two oil-way pipes on described oil pump oil-out are provided with described three position four-way electromagnetic valve respectively, hydraulic lock and off-load electromagnetic valve, the oil-feed P mouth of described three position four-way electromagnetic valve is connected with an oil-out of described oil pump, the oil return T mouth of described three position four-way electromagnetic valve is connected with described hydraulic oil container, the A hydraulic fluid port of described three position four-way electromagnetic valve is connected with A1 hydraulic fluid port and the A2 hydraulic fluid port of B hydraulic fluid port corresponding and described hydraulic lock respectively, the B1 hydraulic fluid port of described hydraulic lock and B2 hydraulic fluid port are corresponding with the cavity of resorption of the described jack on corresponding oil-way pipe and epicoele respectively to be connected, the oil-in of described off-load electromagnetic valve is connected between the B1 hydraulic fluid port of described hydraulic lock and the cavity of resorption of the jack on corresponding oil-way pipe, the oil-out of described off-load electromagnetic valve is connected with described hydraulic oil container；
Described controller is provided with signal input part and signal output part, four described pressure transducers and two institute's displacement sensors are connected with the signal input part of described controller respectively, and said two three position four-way electromagnetic valve, two described off-load electromagnetic valves are connected with the signal output part of described controller respectively with described converter.
The beneficial effects of the utility model are: this utility model a kind of one drag two prestressing force intelligent tensioning hydraulic means takes full advantage of two independent oil-outs of oil pump and controls two jack simultaneously, stretch-draw fuel delivery is adjusted by Frequency Converter Control, save energy consumption, it is effectively prevented the internal hemorrhage due to trauma that during oil pump uses, oil temperature rising causes, sensor measurement is forbidden, hydraulic component is the disadvantage such as aging easily, extends the service life of this device；Pressure transducer and displacement transducer can Real-time Collections send jack tension power and jack elongation to controller, there is provided for controller and operate decision data timely, thus realizing the accurate control to converter and off-load electromagnetic valve, improve stretch-draw precision, and two independent synchronous tension hydraulic means can carry out Synchronization Control, and the safety for synchronous tension hydraulic means provides guarantee.
On the basis of technique scheme, this utility model can also do following improvement.
Further, two oil-way pipes on described oil pump oil-out are provided with an overflow valve respectively, one end of described overflow valve is connected between described three position four-way electromagnetic valve and an oil-out of described oil pump, and the other end of described overflow valve is connected with described hydraulic oil container.
Adopt above-mentioned further scheme to provide the benefit that: the use of a pair overflow valve, it is possible to when oil pressure is too high, open release hydraulic oil, it is to avoid because of the too high damage oil circuit of oil pressure, it is ensured that the safety of this device.
Further, being additionally provided with filter between oil-in and the described hydraulic oil container of described oil pump, the oil-in of described oil pump is connected with described hydraulic oil container by described filter.
Adopt above-mentioned further scheme to provide the benefit that: hydraulic oil can be filtered by filter, it is ensured that hydraulic oil pure, and then ensure that the unimpeded of oil circuit.
Further, the off-load electromagnetic valve on two oil-way pipes on described oil pump oil-out is any one in N-type Solenoid ball valve, P type Solenoid ball valve, U-shaped Solenoid ball valve and C type Solenoid ball valve.
Further, the three position four-way electromagnetic valve on two oil-way pipes on described oil pump oil-out is any one in H type, F type, G type, the T-shaped and three position four-way electromagnetic valve of V-type.
Further, the oil-in of the off-load electromagnetic valve on two oil-way pipes on described oil pump oil-out is connected between the B1 hydraulic fluid port of described hydraulic lock and the cavity of resorption of corresponding jack each through antivibrator.
Above-mentioned further scheme is adopted to provide the benefit that: antivibrator can reduce off-load electromagnetic valve when opening, the impact that system is produced by the active force that stretch-draw jack produces, and limit system pressure and suddenly decline.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model a kind of one drag two prestressing force intelligent tensioning hydraulic means.
In accompanying drawing, the list of parts representated by each label is as follows:
1, converter, 2, motor, 3, oil pump, 31, first oil-way pipe, 32, second oil-way pipe, 4, hydraulic oil container, 5, first jack, 6, second jack, 7, first displacement transducer, 8, second displacement sensor, 9, first three position four-way electromagnetic valve, 10, second three position four-way electromagnetic valve, 11, first hydraulic lock, 12, second hydraulic lock, 13, first off-load electromagnetic valve, 14, second off-load electromagnetic valve, 15, first pressure transducer, 16, second pressure transducer, 17, 3rd pressure transducer, 18, 4th pressure transducer, 19 controllers, 20, first overflow valve, 21, second overflow valve, 22, filter, 23, first antivibrator, 24, second antivibrator.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present utility model and feature being described, example is served only for explaining this utility model, is not intended to limit scope of the present utility model.
As shown in Figure 1, a kind of one drag two prestressing force intelligent tensioning hydraulic means, including converter 1, motor 2, oil pump 3, hydraulic oil container the 4, first jack the 5, second jack the 6, first displacement transducer 7, second displacement sensor the 8, first three position four-way electromagnetic valve the 9, second three position four-way electromagnetic valve the 10, first hydraulic lock the 11, second hydraulic lock the 12, first off-load electromagnetic valve the 13, second off-load electromagnetic valve the 14, first pressure transducer the 15, second pressure transducer the 16, the 3rd pressure transducer the 17, the 4th pressure transducer 18 and controller 19.
Described converter 1 is connected with the input of described motor 2, the outfan of described motor 2 is connected with described oil pump 3, described oil pump 3 is provided with an oil-in and two oil-outs, the oil-in of described oil pump 3 is connected with described hydraulic oil container 4 by filter 22, one oil-out of described oil pump 3 is connected with described first jack 5 by the first oil-way pipe 31, the piston rod of described first jack 5 is provided with described first displacement transducer 7, another oil-out of described oil pump 3 is connected with described second jack 6 by the second oil-way pipe 32, the piston rod of described second jack 6 is provided with second displacement sensor 8.
Described first oil-way pipe 31 is provided with described first three position four-way electromagnetic valve 9, first hydraulic lock 11 and the first off-load electromagnetic valve 13, the oil-feed P mouth of described first three position four-way electromagnetic valve 9 is connected with an oil-out of described oil pump 3, the oil return T mouth of described first three position four-way electromagnetic valve 9 is connected with described hydraulic oil container 4, the A hydraulic fluid port of described first three position four-way electromagnetic valve 9 is connected with A1 hydraulic fluid port and the A2 hydraulic fluid port of B hydraulic fluid port corresponding and described first hydraulic lock 11 respectively, the B1 hydraulic fluid port of described first hydraulic lock 11 is connected with cavity of resorption and the epicoele of B2 hydraulic fluid port corresponding and described first jack 5 respectively, the oil-in of described first off-load electromagnetic valve 13 is connected on the oil-way pipe 31 between B1 hydraulic fluid port and the cavity of resorption of the first jack 5 of described first hydraulic lock 11 by the first antivibrator 23, the oil-out of described first off-load electromagnetic valve 13 is connected with described hydraulic oil container 4, described first pressure transducer 15 is connected on the cavity of resorption of described first jack 5, described second sensor 16 is connected on the epicoele of described first jack 5, oil-way pipe 31 between described first three position four-way electromagnetic valve 9 and an oil-out of described oil pump 3 is provided with the first overflow valve 20, one end of described first overflow valve 20 is connected on described first oil-way pipe 31, the other end of described first overflow valve 20 is connected with described hydraulic oil container 4.
Described second oil-way pipe 32 is provided with described second three position four-way electromagnetic valve 10, second hydraulic lock 12 and the second off-load electromagnetic valve 14, the oil-feed P mouth of described second three position four-way electromagnetic valve 10 is connected with another oil-out of described oil pump 3, the oil return T mouth of described second three position four-way electromagnetic valve 10 is connected with described hydraulic oil container 4, the A hydraulic fluid port of described second three position four-way electromagnetic valve 10 is connected with A1 hydraulic fluid port and the A2 hydraulic fluid port of B hydraulic fluid port corresponding and described second hydraulic lock 12 respectively, the B1 hydraulic fluid port of described second hydraulic lock 12 is connected with cavity of resorption and the epicoele of B2 hydraulic fluid port corresponding and described second jack 6 respectively, the oil-in of described second off-load electromagnetic valve 14 is connected on the oil-way pipe 32 between B1 hydraulic fluid port and the cavity of resorption of the second jack 6 of described second hydraulic lock 12 by the second antivibrator 24, the oil-out of described second off-load electromagnetic valve 14 is connected with described hydraulic oil container 4, described 3rd pressure transducer 17 is connected on the cavity of resorption of described second jack 6, described 4th sensor 18 is connected on the epicoele of described second jack 6, oil-way pipe 32 between described second three position four-way electromagnetic valve 10 and another oil-out of described oil pump 3 is provided with the second overflow valve 21, one end of described second overflow valve 21 is connected on described first oil-way pipe 32, the other end of described second overflow valve 21 is connected with described hydraulic oil container 4.
Described controller 19 is provided with signal input part and signal output part, described first pressure transducer the 15, second pressure transducer the 16, the 3rd pressure transducer the 17, the 4th pressure transducer the 18, first displacement transducer 7 is connected with the signal input part of described controller 19 respectively with second displacement sensor 8, and described first three position four-way electromagnetic valve the 9, second three position four-way electromagnetic valve the 10, first off-load electromagnetic valve the 13, second off-load electromagnetic valve 14 is connected with the signal output part of described controller 19 respectively with converter 1.
Described first off-load electromagnetic valve 13 and the second off-load electromagnetic valve 14 are any one in N-type Solenoid ball valve, P type Solenoid ball valve, U-shaped Solenoid ball valve and C type Solenoid ball valve.Described first three position four-way electromagnetic valve 9 and the second three position four-way electromagnetic valve 10 are any one in H type, F type, G type, the T-shaped and three position four-way electromagnetic valve of V-type.
In this utility model one one drag two prestressing force intelligent tensioning hydraulic means, the another two hydraulic fluid port except oil-feed P mouth and oil return T mouth in the A hydraulic fluid port of three position four-way electromagnetic valve and four hydraulic fluid ports that B hydraulic fluid port is three position four-way electromagnetic valve；Hydraulic lock is made up of two hydraulic control one-way valves, and the A1 hydraulic fluid port of hydraulic lock and B1 hydraulic fluid port correspond to forward oil-in (reverse oil-out) and forward oil-out (the reverse oil-in) of a hydraulic control one-way valve in hydraulic lock respectively；The A2 hydraulic fluid port of hydraulic lock and B2 hydraulic fluid port correspond to forward oil-in (reverse oil-out) and forward oil-out (the reverse oil-in) of another hydraulic control one-way valve in hydraulic lock respectively.
In this utility model one one drag two prestressing force intelligent tensioning hydraulic means, converter 1, first three position four-way electromagnetic valve 9, second three position four-way electromagnetic valve 10, first off-load electromagnetic valve 13, second off-load electromagnetic valve 14, first pressure transducer 15, second pressure transducer 16, 3rd pressure transducer 17, 4th pressure transducer 18, first displacement transducer 7 is connected with controller 19 each through holding wire with second displacement sensor 8, controller 19 is by receiving the first pressure transducer 15, second pressure transducer 16, 3rd pressure transducer 17, 4th pressure transducer 18, the detection data of the first displacement transducer 7 and second displacement sensor 8 control converter 1, first three position four-way electromagnetic valve 9, second three position four-way electromagnetic valve 10, first off-load electromagnetic valve 13 and the second off-load electromagnetic valve 14.
Concrete, described converter 1 uses cable to be connected with described motor 2, controls converter 1 by controller 19, so that converter 1 changes the frequency of the working power of described motor 2, thus adjusting the tensioning speed of this utility model device, and then realize the dynamic equilibrium of stretch-draw；It addition, described converter 1 is possible not only to when described oil pump 3 does not work, stop power supply output, reduce energy consumption, and because of the acceleration function of converter 1 startup, it is possible to avoid causing the damage of described motor 2 because of frequently starting suddenly of described motor 2.
Concrete, described first displacement transducer 7 is arranged on the piston rod of described first jack 5, described second displacement sensor 8 is arranged on the piston rod of described second jack 6, can gather and send the elongation at part two ends to be tensioned respectively real-time dynamicly to controller by described first displacement transducer 7 and second displacement sensor 8, to control the rotating speed of motor 2 exactly by described converter 1 and to control the first three position four-way electromagnetic valve 9, second three position four-way electromagnetic valve 10, the opening and closing of the first off-load electromagnetic valve 13 and the second off-load electromagnetic valve 14, thus realizing the balance of the middle piston elongation of stretching process.
Concrete, described first pressure transducer 15 is connected on the cavity of resorption of described first jack 5, described second sensor 16 is connected on the epicoele of described first jack 5, described 3rd pressure transducer 17 is connected on the cavity of resorption of described second jack 6, described 4th sensor 18 is connected on the epicoele of described second jack 6, by described first pressure transducer, second pressure transducer, 3rd pressure transducer and the 4th pressure transducer can distinguish the first jack 5 epicoele of collection real-time dynamicly of correspondence, first jack 5 cavity of resorption, oil pressure in second jack 6 epicoele and the second jack 6 cavity of resorption, and by corresponding oil pressure and be sent to controller, to control the rotating speed of described motor 2 exactly by described converter 1 and to control the first three position four-way electromagnetic valve 9, second three position four-way electromagnetic valve 10, the opening and closing of the first off-load electromagnetic valve 13 and the second off-load electromagnetic valve 14, thus realizing the automatization of stretching process and improving the precision of stretch-draw.
Before concrete described first antivibrator 23 is connected to the oil-in of described first off-load electromagnetic valve 13, before described second antivibrator 24 is connected to the oil-in of described second off-load electromagnetic valve 14, described first antivibrator 23 and the second antivibrator 24 corresponding respectively can reduce described first off-load electromagnetic valve 13 and when the second off-load electromagnetic valve 14 opens, the impact that system is produced by the active force that described first jack 5 and the second jack 6 produce, and limit system pressure and suddenly decline.
Elaborate the work process of this utility model one drag two prestressing force intelligent tensioning hydraulic means below in conjunction with accompanying drawing Fig. 1, due to the structure of two-way oil-way pipe with complete said function, only illustrate with the first oil-way pipe 31 below.
When the first three position four-way electromagnetic valve 9 not electric time, frequency conversion 1 device drive motor 2 rotates, by filter 22 by the hydraulic oil sucking-off in hydraulic oil container 4, the oil-feed P mouth then passing through the first three position four-way electromagnetic valve 9 enters in the first three position four-way electromagnetic valve 9, now, hydraulic oil directly from the oil return T mouth of the first three position four-way electromagnetic valve 9 without pressure hydraulic return fuel tank 4.
Loading procedure: when the right side electric magnet of the first three position four-way electromagnetic valve 9 obtain electric after, hydraulic oil enters in the first three position four-way electromagnetic valve 9 by the oil-feed P mouth of the first three position four-way electromagnetic valve 9, then export from the A mouth of the first three position four-way electromagnetic valve 9, then pass sequentially through the A1 hydraulic fluid port of the first hydraulic lock 11 and B1 hydraulic fluid port enters the cavity of resorption of the first jack 5, the first jack 5 piston is promoted to be displaced outwardly, first jack 5 drives the first displacement transducer 7 to extend outward, to obtain the overhang of the first jack 5 piston, when the first jack 5 piston nose has resistance, oil pressure can rise, hydraulic oil in first jack 5 epicoele passes sequentially through B2 hydraulic fluid port and the outflow of A2 hydraulic fluid port of the first hydraulic lock 11 simultaneously, B mouth and oil return T mouth hydraulic return fuel tank 4 then in turn through the first three position four-way electromagnetic valve 9.
Pressure maintaining period: when motor 2 stops operating or after the first three position four-way electromagnetic valve 9 dead electricity, first jack 5 cavity of resorption hydraulic oil is blocked by the A1 hydraulic fluid port of the first hydraulic lock 11 and B1 hydraulic fluid port backward stop, maintain the first jack 5 cavity of resorption oil pressure, make the first jack 5 be in packing state.
Unloading process: when the first off-load electromagnetic valve 13 electric after, the hydraulic oil of the first jack 5 cavity of resorption oil-in hydraulic return fuel tank 4 by the first off-load electromagnetic valve 13, the oil pressure of the first jack 5 cavity of resorption declines.
Return stroke: when on the left of the first three position four-way electromagnetic valve 9 electric magnet obtain electric after, hydraulic oil in hydraulic oil container 4 is entered by the oil-feed P mouth of the first three position four-way electromagnetic valve 9, then export from the B mouth of the first three position four-way electromagnetic valve 9, then pass sequentially through the A2 hydraulic fluid port of the first hydraulic lock 11 and B2 hydraulic fluid port enters the epicoele of the first jack 5, the first jack 5 piston is promoted to move back, first jack 5 drives the first displacement transducer 7 back to shorten, the hydraulic oil of the first jack 5 cavity of resorption passes sequentially through B1 hydraulic fluid port and the outflow of A1 hydraulic fluid port of the first hydraulic lock 11 simultaneously, sequentially pass through A hydraulic fluid port and the oil return T mouth hydraulic return fuel tank of the first three position four-way electromagnetic valve 9 again.After the first jack 5 falls back on the end, the oil pressure of the first jack 5 epicoele begins to ramp up, and after controller 19 detects that the first jack 5 epicoele oil pressure reaches setting value, controller 19 controls the first three position four-way electromagnetic valve dead electricity, quits work.
The oil-way pipe of this utility model a kind of one drag two prestressing force intelligent tensioning hydraulic means both sides is symmetrical, and operation principle is the same, so the operation principle of the second jack is identical with the operation principle of the first jack.
The utility model has the advantage of: 1, two the independent oil-outs taking full advantage of oil pump due to one drag two prestressing force intelligent tensioning hydraulic means of the present utility model control two jack simultaneously, it is achieved that two set oil pumps can control the stretching plan of four jack simultaneously.2, the opening and closing owing to employing three position four-way electromagnetic valve and off-load electromagnetic valve do not need manual operation but carry out Automated condtrol by controller, so that operator are less and anthropic factor also greatly reduces, thus production cost can be saved, improve stretch-draw precision；3, pressure transducer and displacement transducer can Real-time Collections send jack tension power and jack elongation to controller, there is provided for controller and operate decision data timely, thus the accurate control to tensioning equipment can not only be realized, and then improve stretch-draw precision, and two independent synchronous tension hydraulic means can carry out Synchronization Control, and the safety for synchronous tension hydraulic means provides guarantee.4, adjusting stretch-draw fuel delivery by Frequency Converter Control, saved energy consumption, being effectively prevented during oil pump uses oil temperature raises the internal hemorrhage due to trauma that causes, and sensor measurement is forbidden, and hydraulic component is the disadvantage such as aging easily.Improve the degree of accuracy of cable tensios control simultaneously, reduce the complexity of hydraulic system, improve reliability and the maintainability of whole product.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (6)
1. an one drag two prestressing force intelligent tensioning hydraulic means, it is characterised in that: include converter, motor, oil pump, hydraulic oil container, jack, displacement transducer, pressure transducer, three position four-way electromagnetic valve, hydraulic lock, off-load electromagnetic valve and controller；
Described converter is connected with the input of described motor, the outfan of described motor is connected with described oil pump, described oil pump is provided with an oil-in and two oil-outs, the oil-in of described oil pump is connected with described hydraulic oil container, two oil-outs of described oil pump are respectively by corresponding being connected with two described jack of oil-way pipe, the piston rod of two described jack is provided with displacement transducer respectively, the epicoele of two described jack and cavity of resorption are provided with a pressure transducer respectively；
Two oil-way pipes on described oil pump oil-out are provided with described three position four-way electromagnetic valve respectively, hydraulic lock and off-load electromagnetic valve, the oil-feed P mouth of described three position four-way electromagnetic valve is connected with an oil-out of described oil pump, the oil return T mouth of described three position four-way electromagnetic valve is connected with described hydraulic oil container, the A hydraulic fluid port of described three position four-way electromagnetic valve is connected with A1 hydraulic fluid port and the A2 hydraulic fluid port of B hydraulic fluid port corresponding and described hydraulic lock respectively, the B1 hydraulic fluid port of described hydraulic lock and B2 hydraulic fluid port are corresponding with the cavity of resorption of the described jack on corresponding oil-way pipe and epicoele respectively to be connected, the oil-in of described off-load electromagnetic valve is connected between the B1 hydraulic fluid port of described hydraulic lock and the cavity of resorption of the jack on corresponding oil-way pipe, the oil-out of described off-load electromagnetic valve is connected with described hydraulic oil container；
Described controller is provided with signal input part and signal output part, four described pressure transducers and two institute's displacement sensors are connected with the signal input part of described controller respectively, and said two three position four-way electromagnetic valve, two described off-load electromagnetic valves are connected with the signal output part of described controller respectively with described converter.
2. a kind of one drag two prestressing force intelligent tensioning hydraulic means according to claim 1, it is characterized in that: two oil-way pipes on described oil pump oil-out are provided with an overflow valve respectively, one end of described overflow valve is connected between described three position four-way electromagnetic valve and an oil-out of described oil pump, and the other end of described overflow valve is connected with described hydraulic oil container.
3. a kind of one drag two prestressing force intelligent tensioning hydraulic means according to claim 1 and 2, it is characterized in that: being additionally provided with filter between oil-in and the described hydraulic oil container of described oil pump, the oil-in of described oil pump is connected with described hydraulic oil container by described filter.
4. a kind of one drag two prestressing force intelligent tensioning hydraulic means according to claim 1 and 2, it is characterised in that: the off-load electromagnetic valve on two oil-way pipes on described oil pump oil-out is any one in N-type Solenoid ball valve, P type Solenoid ball valve, U-shaped Solenoid ball valve and C type Solenoid ball valve.
5. a kind of one drag two prestressing force intelligent tensioning hydraulic means according to claim 1 and 2, it is characterised in that: the three position four-way electromagnetic valve on two oil-way pipes on described oil pump oil-out is any one in H type, F type, G type, the T-shaped and three position four-way electromagnetic valve of V-type.
6. a kind of one drag two prestressing force intelligent tensioning hydraulic means according to claim 1 and 2, it is characterised in that: the oil-in of the off-load electromagnetic valve on two oil-way pipes on described oil pump oil-out is connected between the B1 hydraulic fluid port of described hydraulic lock and the cavity of resorption of corresponding jack each through antivibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098858.0U CN205348806U (en) | 2016-02-01 | 2016-02-01 | One drags two prestressing force intelligence stretch -draw hydraulic means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098858.0U CN205348806U (en) | 2016-02-01 | 2016-02-01 | One drags two prestressing force intelligence stretch -draw hydraulic means |
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| CN205348806U true CN205348806U (en) | 2016-06-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437069A (en) * | 2018-03-14 | 2018-08-24 | 林朝强 | A kind of multiple blade saw cutting apparatus and its control method |
| CN113148892A (en) * | 2021-05-13 | 2021-07-23 | 上海航空机械有限公司 | Electric hydraulic jack and synchronous lifting control system |
-
2016
- 2016-02-01 CN CN201620098858.0U patent/CN205348806U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437069A (en) * | 2018-03-14 | 2018-08-24 | 林朝强 | A kind of multiple blade saw cutting apparatus and its control method |
| CN113148892A (en) * | 2021-05-13 | 2021-07-23 | 上海航空机械有限公司 | Electric hydraulic jack and synchronous lifting control system |
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