CN103233927A - Hydraulic control system of hydraulic tower crane and hydraulic tower crane - Google Patents
Hydraulic control system of hydraulic tower crane and hydraulic tower crane Download PDFInfo
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- CN103233927A CN103233927A CN2013101691981A CN201310169198A CN103233927A CN 103233927 A CN103233927 A CN 103233927A CN 2013101691981 A CN2013101691981 A CN 2013101691981A CN 201310169198 A CN201310169198 A CN 201310169198A CN 103233927 A CN103233927 A CN 103233927A
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- 239000003921 oil Substances 0.000 claims abstract description 254
- 238000001816 cooling Methods 0.000 claims abstract description 111
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 34
- 239000002828 fuel tank Substances 0.000 claims description 32
- 239000000945 filler Substances 0.000 claims description 18
- 230000009194 climbing Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The invention provides a hydraulic control system of a hydraulic tower crane and the hydraulic tower crane. The hydraulic control system includes: the oil cooler comprises an oil inlet and an oil outlet and is used for cooling hydraulic oil of the hydraulic tower crane; the safety brake caliper is used for hydraulically braking a luffing mechanism of the hydraulic tower crane; the oil outlet of the oil cooler is communicated with the oil tank; the cooling oil pump is used for conveying the hydraulic oil in the oil tank to an oil inlet of the oil cooler and the safety brake caliper; and the reversing valve is used for selectively conveying the hydraulic oil from the outlet of the cooling oil pump to the oil inlet of the oil cooler and the safety brake caliper. According to the invention, the cooling oil pump has multiple purposes, so that the cooling oil pump not only cools the hydraulic oil, but also can provide the braking oil for the safety brake caliper, so that a special pump station does not need to be arranged for the braking oil of the safety brake caliper, and the occupied limited space on the balance arm is reduced.
Description
Technical field
The present invention relates to the Hoisting Machinery field, more specifically, relate to a kind of hydraulic control system and hydraulic pressure tower machine of hydraulic pressure tower machine.
Background technique
Swing arm tower machine it is advantageous that and can carry out revolution work than narrow space that therefore, the length of its balance arm is more short more good with respect to the tower machine of other types.Along with the high speed development of swing arm tower machine technology, balance arm length is that the least radius of gyration becomes the significant dimensions parameter of weighing a swing arm tower machine performance gradually.In the prior art, indispensable safety brake clamps (being luffing second break), jacking cylinder etc. on the swing arm tower machine all needs to use hydraulic power unit, and wherein the control oil circuit of cooling system, jack-up system, safety brake pincers independently arranges respectively.
Fig. 1 shows the principle schematic of the cooling control oil circuit of hydraulic pressure swing arm tower machine in the prior art.The entrance of cooling oil pump 220 is connected with fuel tank 210, and the outlet of cooling oil pump 220 is connected with the entrance of filter 230, and the outlet of filter 230 is connected with the filler opening of oil cooler 240, and the oil outlet of oil cooler 240 is connected by the oil extraction pipeline with fuel tank 210.Wherein cooling oil pump 220 can not provide hydraulic oil for jack-up system and/or safety brake pincers.
In realizing process of the present invention, the inventor finds that there is following problem at least in above prior art:
On hydraulic pressure swing arm tower machine, be safety brake pincers and jack-up system configuration pumping plant no matter be separately by the arrangement of motor driving tower machine, or the transfer case place additional strings pump in the power bag, the capital takies the space, remarkable aisle on the balance arm, had a strong impact on the walking on the balance arm, even might be also can with balance arm on the A cabinet frame interfere, arrange neither hommization like this, also uneconomical.
Summary of the invention
The object of the invention is to provide a kind of hydraulic control system and hydraulic pressure tower machine of hydraulic pressure tower machine, can save the space on the balance arm.Further, can also save product cost.
A first aspect of the present invention provides a kind of hydraulic control system of hydraulic pressure tower machine, and hydraulic control system comprises: oil cooler, oil cooler comprise filler opening and oil outlet, are used for the hydraulic oil of cooling hydraulic pressure tower machine; The safety brake pincers are for the jib lubbing mechanism of hydraulic braking hydraulic pressure tower machine; Fuel tank, the oil outlet of oil cooler is communicated with fuel tank; Cooling oil pump is for the filler opening that the hydraulic oil in the fuel tank is flowed to oil cooler and safety brake pincers; Selector valve is used for selectively being delivered to filler opening and the safety brake pincers of oil cooler from the hydraulic oil of cooling oil pump outlet.
Further, selector valve comprises selector valve pressure hydraulic fluid port, selector valve oil drain out, selector valve first actuator port and selector valve second actuator port, the selector valve oil drain out is communicated with fuel tank, hydraulic control system also comprises: the first pressure branch road, the first pressure branch road and cold oil delivery side of pump have connected state, and selector valve pressure hydraulic fluid port is communicated with the first pressure branch road; Brake circuit, selector valve first actuator port is connected by brake circuit with the safety brake pincers; The first cooling branch road has connected state with oil cooler, and selector valve second actuator port is connected with the first cooling branch road.
Further, hydraulic control system also comprises: one-way valve be serially connected with brake circuit, and the entry end of one-way valve is communicated with selector valve first actuator port; Accumulator is connected on the brake circuit between one-way valve and the safety brake pincers.
Further, selector valve is solenoid directional control valve, hydraulic control system also comprises controller and for detection of the pressure-detecting device of energy storage pressure, controller is electrically connected respectively with selector valve and pressure-detecting device respectively, selectively is communicated with selector valve first actuator port and selector valve second actuator port with the selector valve pressure hydraulic fluid port of controlling selector valve.
Further, hydraulic control system also comprises first relief valve, and the entry end of first relief valve is communicated with selector valve first actuator port, and the outlet end of first relief valve is communicated with fuel tank.
Further, hydraulic control system also comprises switch valve, and an end of switch valve is communicated with safety brake pincers filler opening end, and second end of switch valve is communicated with fuel tank.
Further, hydraulic control system also comprises the jacking cylinder for the climbing frame of jacking hydraulic pressure tower machine, and the hydraulic oil in the fuel tank flows to jacking cylinder via cooling oil pump.
Further, hydraulic control system also comprises the jacking cylinder for the climbing frame of jacking hydraulic pressure tower machine, and the hydraulic oil in the fuel tank flows to jacking cylinder via cooling oil pump.
Further, hydraulic control system also comprises multi-way valve, and multi-way valve will selectively be delivered to filler opening and the jacking cylinder of oil cooler from the hydraulic oil of cooling oil pump outlet.
Further, multi-way valve comprises the multi-way valve first pressure hydraulic fluid port, multi-way valve oil drain out, multi-way valve first actuator port and multi-way valve second actuator port, multi-way valve oil drain out and oil cooler have connected state, hydraulic control system also comprises: the second pressure branch road, the second pressure branch road and cold oil delivery side of pump have connected state, and the multi-way valve first pressure hydraulic fluid port is communicated with the second pressure branch road; The first jacking oil circuit, the rodless cavity of connection multi-way valve first actuator port and jacking cylinder; The second jacking oil circuit, the rod chamber of connection multi-way valve second actuator port and jacking cylinder.
Further, hydraulic control system also comprises the second cooling branch road, and the second cooling branch road and oil cooler have connected state, and the multi-way valve oil drain out is communicated with the second cooling branch road.
Further, hydraulic control system also comprises: the principal pressure oil circuit, and the principal pressure oil circuit is connected with the cold oil delivery side of pump; The first oil circuit changing valve, the first oil circuit changing valve comprise three first valve connection mouths, and three first valve connection mouths are connected with principal pressure oil circuit, the first pressure branch road and the second pressure branch road respectively.
Further, hydraulic control system also comprises: main cooling oil circuit, and main cooling oil circuit is connected with the filler opening of oil cooler; The second oil circuit changing valve, the second oil circuit changing valve comprise three second valve connection mouths, and three second valve connection mouths are connected with main cooling oil circuit, the first cooling branch road and the second cooling branch road respectively.
Further, multi-way valve also comprises the multi-way valve second pressure hydraulic fluid port and multi-way valve the 3rd actuator port, and the multi-way valve second pressure hydraulic fluid port is communicated with the second pressure branch road, and multi-way valve the 3rd actuator port is communicated with the second cooling branch road; And when the control spool of multi-way valve was in meta, the multi-way valve second pressure hydraulic fluid port was communicated with multi-way valve the 3rd actuator port, and multi-way valve first actuator port is communicated with the multi-way valve oil drain out, and the multi-way valve first pressure hydraulic fluid port and multi-way valve second actuator port disconnect.
Further, hydraulic control system also comprises second relief valve, and the entry end of second relief valve is communicated with the second pressure branch road, and the outlet end of second relief valve is communicated with the second cooling branch road.
Further, hydraulic control system also comprises second relief valve, and the entry end of second relief valve is communicated with multi-way valve pressure hydraulic fluid port, and the outlet end of second relief valve is communicated with the multi-way valve oil drain out.
A second aspect of the present invention provides a kind of hydraulic pressure tower machine, comprises hydraulic control system, and hydraulic control system is the hydraulic control system according to each hydraulic pressure tower machine in the first aspect present invention.
A third aspect of the present invention also provides a kind of hydraulic pressure tower machine, comprise balance arm, pivoting support and hydraulic control system, hydraulic control system be according to a first aspect of the invention in the hydraulic control system of each hydraulic pressure tower machine in the 7th to the 12nd, cooling oil pump is arranged on the balance arm, and the every oil pipe that is arranged between cooling oil pump and the jacking cylinder of hydraulic control system disconnects at the pivoting support place, and in gap configuration rapid pipe joint.
Hydraulic control system and hydraulic pressure tower machine according to hydraulic pressure tower machine of the present invention, because cooling oil pump one pump is used more, except hydraulic oil is cooled off, can also provide braking with oily to the safety brake pincers, thereby need not with oil special pumping plant to be set for the braking of safety brake pincers, reduce the confined space that takies on the balance arm.Further, also saved production cost of products.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the principle schematic that oil circuit is controlled in the cooling of the hydraulic pressure swing arm tower machine of prior art;
Fig. 2 is the above part-structure schematic representation of climbing frame according to the hydraulic pressure swing arm tower machine of the embodiment of the invention;
Fig. 3 is each modular construction schematic representation on the balance arm of hydraulic pressure swing arm tower machine of the embodiment of the invention;
Fig. 4 is the principle schematic according to the hydraulic control system of swing arm tower machine of the present invention.
Embodiment
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The hydraulic control system of hydraulic pressure tower machine of the present invention mainly comprises fuel tank, oil cooler, safety brake pincers, cooling oil pump and selector valve.Oil cooler comprises filler opening and oil outlet, is used for the hydraulic oil of cooling hydraulic pressure tower machine.The safety brake pincers are used for the jib lubbing mechanism of hydraulic braking hydraulic pressure tower machine.The oil outlet of oil cooler is communicated with fuel tank.Cooling oil pump is used for the hydraulic oil in the fuel tank is flowed to filler opening and the safety brake pincers of oil cooler.Selector valve is used for selectively being delivered to filler opening and the safety brake pincers of oil cooler from the hydraulic oil of cooling oil pump outlet.Because the many usefulness of cooling oil pump one pump, when normally hydraulic oil being cooled off, can also provide braking with oil to the safety brake pincers, thereby need not with oil special pumping plant to be set for the braking of safety brake pincers, minimizing takies the confined space on the balance arm.And, saved production cost of products.
Further, hydraulic control system also comprises the jacking cylinder for the climbing frame of jacking hydraulic pressure tower machine, and cooling oil pump also is used for the hydraulic oil in the fuel tank is flowed to jacking cylinder.Utilize cooling oil pump control jacking cylinder, then need not to jack-up system arranges special pumping plant, thereby further reduce the space that takies on the balance arm and further save production cost of products.
Below with reference to Fig. 2 to Fig. 4 one embodiment of the invention is specifically described.This embodiment illustrates hydraulic control system and the hydraulic pressure tower machine of hydraulic pressure tower machine of the present invention with hydraulic pressure swing arm tower machine and hydraulic control system thereof.But need to prove that more can show its advantage though use hydraulic control system of the present invention in hydraulic pressure swing arm tower machine, hydraulic control system of the present invention also is suitable for using in the hydraulic pressure tower machine of other form.
As shown in Figures 2 and 3, hydraulic pressure swing arm tower machine comprises body of the tower 40, climbing frame 120, jacking cylinder 50, pivoting support 60, shear leg 10, balance arm 20, balancer weight 100, jib lubbing mechanism 70, power bag 80, lifting mechanism 90, safety brake pincers 110, A cabinet frame 30 and aisle 130 etc.Jacking cylinder 50 is used for jacking climbing frame 120, thereby realizes the jacking supernumerary segment of body of the tower 40.Cooling oil pump 220 is positioned at power bag 80 places, cooling oil pump 220 clamps 110 delivery hydraulic pressure oil for cooling system, jack-up system and safety brake simultaneously in the present embodiment, therefore, need not to arrange the special-purpose oil pump of jacking oil pump and safety brake pincers 110, thereby reduced because the space on the aisle 130 that these two pumps take is set, also not can with balance arm 20 on A cabinet frame 30 form and interfere.Wherein safety brake pincers 110 are second break of jib lubbing mechanism 70, are used for driving at first break losing efficacy and jib lubbing mechanism 70 being carried out hydraulic braking when dynamical element and first break changed and keep in repair.
As shown in Figure 4, the hydraulic control system of present embodiment comprises fuel tank 210, cooling oil pump 220, filter 230, oil cooler 240, the first oil circuit changing valve 250, selector valve 260, accumulator 270, pressure-detecting device 280, the second oil circuit changing valve 290, multi-way valve 310, switch valve 320, first relief valve 330, second relief valve 340, one-way valve 350, safety brake pincers 110, jacking cylinder 50 etc. control unit.
Hydraulic control system comprises that also principal pressure oil circuit 410, the first pressure branch road 401, brake circuit 402, the first cooling branch road 403, the second pressure branch road 406, the first jacking oil circuit 407, the second jacking oil circuit 408 and the second cooling branch road 409, main cooling oil circuit 411 etc. are connected the oil circuit of each control unit.
As shown in Figure 4, principal pressure oil circuit 410 is connected with the outlet of cooling oil pump 220.The first pressure branch road 401 has connected state with principal pressure oil circuit 410.Whether the first pressure branch road 401 is communicated with principal pressure oil circuit 410 can be by 250 controls of the first oil circuit changing valve.
Selector valve 260 comprises selector valve pressure hydraulic fluid port, selector valve oil drain out, selector valve first actuator port and selector valve second actuator port.Selector valve pressure hydraulic fluid port is connected with the first pressure branch road 401.Thereby being delivered to the hydraulic oil of principal pressure oil circuit 410, cooling oil pump 220 can when principal pressure oil circuit 410 and the first pressure branch road 401 are in connected state, enter selector valve 260 by the first pressure branch road 401.The selector valve oil drain out is communicated with fuel tank 210, thereby the oil extraction of selector valve 260 can be transported to fuel tank 210.Selector valve first actuator port and safety brake pincers 110 are connected by brake circuit 402.Selector valve second actuator port is connected by the first cooling branch road 403 with oil cooler 240.In the present embodiment, selector valve 260 is in particular solenoid directional control valve.
One-way valve 350 is serially connected with brake circuit 402, and the entry end of one-way valve 350 is communicated with selector valve first actuator port.Accumulator 270 be connected in one-way valve 350 and between brake circuit 402 on.By the non-return effect of one-way valve 350 and the pressurize effect of accumulator 270, can disconnect the retardation pressure of keeping safety brake pincers 110 in the later certain hour at brake circuit 402 and the first pressure branch road 401.
Pressure-detecting device 280 is for detection of accumulator 270 pressure.Hydraulic control system also comprises controller, and controller is electrically connected respectively with selector valve 260 and pressure-detecting device 280 respectively.Controller selectively is communicated with selector valve first actuator port and selector valve second actuator port according to the selector valve pressure hydraulic fluid port of the checkout value control selector valve 260 control selector valves of pressure-detecting device 280.
One end of switch valve 320 is communicated with safety brake pincers (110) filler opening end, and second end of switch valve 320 is communicated with fuel tank 210.Switch valve 320 can be controlled brake circuit 402, and to be in packing state still be the pressure release state.When switch valve 320 was in position shown in Figure 4, brake circuit 402 was the pressure release state, therefore, when needs closed safe brake calipers 110, switch valve 320 is switched to illustrated on positi, the hydraulic oil in the brake circuit 402 can be drained into fuel tank 210, safety brake pincers 110 cut out.When switch valve 320 switched to the another location, brake circuit 402 was packing state.
The entry end of first relief valve 330 is communicated with selector valve first actuator port, and the outlet end of first relief valve 330 is communicated with fuel tank 210.First relief valve 330 can drain into fuel tank 210 with unnecessary hydraulic oil when the overpressure of selector valve first actuator port, guarantee that the oil pressure of brake circuit 402 does not exceed the predetermined safe oil pressure.
In the present embodiment, cooling oil pump 220 also flows to jacking cylinder 50 with the hydraulic oil in the fuel tank 210.The second pressure branch road 406, multi-way valve 310, the first jacking oil circuit 407 and the second jacking oil circuit 408 etc. namely arrange in order to realize this purpose.The second pressure branch road 406 has connected state with cooling oil pump 220.Particularly, whether the second pressure branch road 406 is communicated with and can controls by the first oil circuit changing valve 250 with principal pressure oil circuit 410.Multi-way valve 310 comprises the multi-way valve first pressure hydraulic fluid port, multi-way valve oil drain out, multi-way valve first actuator port and multi-way valve second actuator port, the multi-way valve first pressure hydraulic fluid port is connected with the second pressure branch road 406, and multi-way valve oil drain out and oil cooler 240 have connected state.The first jacking oil circuit 407 is used for connecting the rodless cavity of multi-way valve first actuator port and jacking cylinder 50.The second jacking oil circuit 408 is used for connecting the rod chamber of multi-way valve second actuator port and jacking cylinder 50.Thereby, can control the flexible of jacking cylinder 50 by the switching of multi-way valve 310, thereby realize the jacking supernumerary segment of body of the tower 40.
The second cooling branch road 409 has connected state with oil cooler 240, and the break-make between the second cooling branch road 409 and the oil cooler 240 is by 290 controls of the second oil circuit changing valve.The multi-way valve oil drain out is communicated with the second cooling branch road 409, thereby hydraulic oil can enter oil cooler 240 by the multi-way valve oil drain out.
Principal pressure oil circuit 410 is connected with the outlet of cooling oil pump 220.The first oil circuit changing valve 250 comprises three first valve connection mouths, and three first valve connection mouths are connected with principal pressure oil circuit 410, the first pressure branch road 401 and the second pressure branch road 406 respectively.The first oil circuit changing valve 250 is in particular tee ball valve in the present embodiment.
Main cooling oil circuit 411 is connected with the filler opening of oil cooler 240.The second oil circuit changing valve 290 comprises three second valve connection mouths, and three second valve connection mouths are connected with main cooling oil circuit 411, the first cooling branch road 403 and the second cooling branch road 409 respectively.The second oil circuit changing valve 290 is in particular tee ball valve in the present embodiment.
Preferably, multi-way valve 310 also comprises the multi-way valve second pressure hydraulic fluid port and multi-way valve the 3rd actuator port in the present embodiment, and the multi-way valve second pressure hydraulic fluid port is communicated with the second pressure branch road 406, and multi-way valve the 3rd actuator port is communicated with the second cooling branch road 409.And, as shown in Figure 4, when the control spool of multi-way valve 310 was in meta, the multi-way valve second pressure hydraulic fluid port was communicated with multi-way valve the 3rd actuator port, multi-way valve first actuator port is communicated with the multi-way valve oil drain out, and the multi-way valve first pressure hydraulic fluid port and multi-way valve second actuator port disconnect.This set has guaranteed all to enter oil cooler 240 and cool off after the hydraulic oil of the second pressure branch road 406 is flowed through multi-way valve 310 as long as jacking cylinder 50 does not carry out the jacking operation.
In addition, hydraulic control system comprises that also the entry end of second relief valve, 340, the second relief valves 340 is communicated with the second pressure branch road 406, and the outlet end of second relief valve 340 is communicated with the second cooling branch road 409.If jacking cylinder 50 is obstructed and can't stretches in the process of hydraulic pressure swing arm tower machine jacking supernumerary segment, the interior oil pressure of rodless cavity of jacking cylinder 50 is risen, when oil pressure rises to when surpassing default safe oil pressure, hydraulic oil will and enter oil cooler 240 from second relief valve, 340 overflows to the second cooling branch road 409, finally flow back to fuel tank 210, thereby the effective oil pressure of the second pressure branch road 406 that guaranteed that arranges of second relief valve 340 maintains all the time below the default safe oil pressure value.
The present invention also provides a kind of hydraulic pressure tower machine, and it comprises the hydraulic control system of aforesaid hydraulic pressure tower machine.
In the present embodiment, when the cooling oil pump of hydraulic control system is cooling system, safety brake pincers 110 and jack-up system fuel feeding simultaneously, because cooling oil pump 220 is arranged on the balance arm 20, cooling oil pump 220 and jacking cylinder 50 will lay respectively at the upper and lower both sides of pivoting support 60, because corresponding oil pipe can produce problems such as oil pipes are long, twisting through pivoting support 60.For this reason, the every oil pipe that is arranged between cooling oil pump 220 and the jacking cylinder 50 of hydraulic control system is disconnected at pivoting support 60 places, and in gap configuration rapid pipe joint, can effectively avoid corresponding oil pipe long, when hydraulic pressure swing arm tower machine need carry out the operation of jacking supernumerary segment, can connect rapid pipe joint, when hydraulic pressure swing arm tower machine carries out proper functioning, just take rapid pipe joint apart, can also prevent the twisting problem that corresponding oil pipe causes because of the revolution of pivoting support 60 like this, easy to operate and can leakage of oil.
Above embodiment's hydraulic pressure swing arm tower machine and hydraulic control system thereof are independently controlled oil circuit with cooling system in the prior art, safety brake pincers 110 and jack-up system three kinds and are integrated as a whole.Control unit and the corresponding oil circuit of carrying cooling oil pump 220 and part hydraulic control system on the balance arm 20, the also control unit of bearing part hydraulic control system and corresponding oil circuit on the climbing frame 120.Cooling oil pump 220 is as dynamical element, for the cooling of hydraulic oil, jacking supernumerary segment and the opening of safety brake pincers 110 of body of the tower 40 provide power.Not only saved the space on the balance arm 20, face and saved production cost of products.
Below working principle of the present invention and working procedure are described.
In the present embodiment, when hydraulic control system is in the proper functioning operating mode at hydraulic pressure swing arm tower machine, the hydraulic oil first pressure branch road 401 of flowing through, when hydraulic control system is in jacking supernumerary segment operating mode at hydraulic pressure swing arm tower machine, the hydraulic oil second pressure branch road 406 of flowing through.Working principle and the working procedure of hydraulic control system describe during below respectively to these two kinds of operating modes.
When hydraulic pressure swing arm tower machine was in the proper functioning operating mode, the first oil circuit changing valve 250 switches to principal pressure oil circuit 410 and the first pressure branch road 401 is communicated with and the state of principal pressure oil circuit 410 and 406 disconnections of the second pressure branch road.The second oil circuit changing valve 290 switches to main cooling oil circuit 411 and first and cools off branch road 403 connections and the state of main cooling oil circuit 411 and 409 disconnections of the second cooling branch road.
Selector valve 260 original states are in power failure state, this moment as shown in Figure 4, selector valve pressure hydraulic fluid port is communicated with selector valve first actuator port, the selector valve oil drain out is communicated with selector valve second actuator port, thereby the hydraulic oil of cooling oil pump 220 outlets clamps 110 punching presses by the oil cylinder that principal pressure oil circuit 410, the first pressure branch road 401 and selector valve 260, brake circuit 402 flow to safety brake pincers 110 to safety brake.
When the oil pressure in the oil cylinder of safety brake pincers 110 reaches first pressure (for example 120bar), transmit signals by pressure-detecting device 280 and give controller, controller sends instruction control selector valve 260.Selector valve 260 when electric, oil circuit commutation by selector valve 260, selector valve pressure hydraulic fluid port is communicated with selector valve second actuator port, the selector valve oil drain out is communicated with selector valve first actuator port, thereby the hydraulic oil of cooling oil pump 220 outlets flows into oil cooler 240 by principal pressure oil circuit 410, the first pressure branch road 401, selector valve 260, the first cooling branch road 403 and main cooling oil circuit 411; Simultaneously, because the non-return effect of one-way valve 350 and the pressurize effect of accumulator 270, safety brake pincers 110 are kept open mode always.
Because the leakage of oil circuit, oil pressure in the oil cylinder of safety brake pincers 110 is lower than second pressure (less than first pressure, 100bar for example) time, pressure-detecting device 280 transmits signal and gives controller, and controller sends instruction, selector valve 260 dead electricity, the flow through hydraulic oil commutation of selector valve 260, the oil circuit that leads to oil cooler 240 disconnects, and hydraulic oil begins to flow to again safety brake pincers 110, continues to clamp 110 punching presses to safety brake.
When the oil pressure in the oil cylinder of safety brake pincers 110 reaches first pressure again, pressure-detecting device 280 transmits signal, controller sends selector valve 260 again and gets electric instruction, the oil circuit of selector valve 260 of flowing through commutates again, the oil circuit that leads to oil cooler 240 is connected again, proceed the cooling of hydraulic oil, cooled hydraulic oil flows back to fuel tank 210.Under the proper functioning operating mode, relevant control components and parts make safety brake pincers 110 can remain open mode under jib lubbing mechanism 70 working staties by above do action.Because accumulator 270 has the effect of pressurize, it is very slow that the oil pressure of the oil cylinder of safety brake pincers 110 is revealed, and it is very short that safety brake clamps the required time of 110 stamping processs, therefore most times of hydraulic control system are in the cooling of carrying out hydraulic oil, can not produce materially affect to the cooling work of hydraulic oil in the hydraulic control system.
Under the jacking supernumerary segment operating mode of hydraulic pressure swing arm tower machine, according to the relevant design standard, the jib lubbing mechanism 70 of hydraulic pressure swing arm tower machine, lifting mechanism 90 and pivoting support 60 these three great institutions do not allow action.At this moment, the first oil circuit changing valve 250 switches to that principal pressure oil circuit 410 and the first pressure branch road 401 disconnect and state that principal pressure oil circuit 410 is communicated with the second pressure branch road 406, and the second oil circuit changing valve 290 switches to that main cooling oil circuit 411 and the first cooling branch road 403 disconnect and the main oil circuit 411 that cools off cools off the state that branch road 409 is communicated with second.
When the control spool of multi-way valve 310 was positioned at meta shown in Figure 4, hydraulic oil flowed to oil cooler 240 through the multi-way valve second pressure hydraulic fluid port and multi-way valve the 3rd actuator port, and hydraulic control system is carried out the cooling of hydraulic oil.
When the control spool of multi-way valve 310 is positioned at when upper, the rod chamber that hydraulic oil flows to jacking cylinder 50 through the multi-way valve first pressure hydraulic fluid port and multi-way valve second actuator port of multi-way valve 310, this moment jacking cylinder 50 rodless cavity in hydraulic oil flow to 240 pairs of hydraulic oil of oil cooler through multi-way valve first actuator port and multi-way valve oil drain out and cool off the piston rod withdrawal of jacking cylinder 50.
When the control spool of multi-way valve 310 is positioned at when the next, the rodless cavity that hydraulic oil flows to jacking cylinder 50 through the multi-way valve first pressure hydraulic fluid port and multi-way valve first actuator port of multi-way valve 310, this moment jacking cylinder 50 rod chamber in hydraulic oil flow to 240 pairs of hydraulic oil of oil cooler through multi-way valve second actuator port and multi-way valve oil drain out and cool off, the piston rod of jacking cylinder 50 stretches out.
According to above description as can be known, the hydraulic control system of present embodiment when all the time hydraulic oil being cooled off, can be passed through the jacking supernumerary segment function of the flexible realization hydraulic pressure swing arm tower machine of control jacking cylinder under the jacking supernumerary segment operating mode of hydraulic pressure swing arm tower machine.
To sum up, the present invention has gone up embodiment and has utilized existing cooling oil pump 220, in basic a kind of new hydraulic control system of cooling control oil circuit design shown in Figure 1, make cooling oil pump under the work operating mode of hydraulic pressure swing arm tower machine, realize the refrigerating function of hydraulic oil, when safety brake pincers 110 need the pressurising braking, also can realize the pressurising of safety brake pincers 110, under the jacking operating mode of hydraulic pressure swing arm tower machine, cooling oil pump 220 provides jacking pressure also can for jacking cylinder 50, realizes the jacking supernumerary segment of body of the tower 40.
Above embodiment should not be construed as limiting the invention, for example, the first oil circuit changing valve 250 and the second oil circuit changing valve 290 have all adopted tee ball valve in the present embodiment, under tower machine jacking supernumerary segment operating mode, so but the circulating direction of two tee ball valves of manual switchover, but in a unshowned embodiment, also available selector valve is replaced tee ball valve, though oil circuit can relative complex some, can realize automatic reverse.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect: working principle is simple, practicability is high, has reduced the quantity of pumping plant, additionally not taking on the balance arm in the confined space, has saved product cost.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. the hydraulic control system of a hydraulic pressure tower machine is characterized in that, described hydraulic control system comprises:
Oil cooler (240), described oil cooler (240) comprises filler opening and oil outlet, is used for the hydraulic oil of the described hydraulic pressure tower machine of cooling;
Safety brake pincers (110) are for the jib lubbing mechanism (70) of the described hydraulic pressure tower of hydraulic braking machine;
Fuel tank (210), the oil outlet of described oil cooler (240) is communicated with described fuel tank (210);
Cooling oil pump (220) is used for filler opening and described safety brake pincers (110) that the hydraulic oil that described fuel tank (210) is interior flows to described oil cooler (240);
Selector valve (260) is used for selectively being delivered to filler opening and the described safety brake pincers (110) of described oil cooler (240) from the described hydraulic oil of described cooling oil pump (220) outlet.
2. the hydraulic control system of hydraulic pressure tower machine according to claim 1, it is characterized in that, described selector valve (260) comprises selector valve pressure hydraulic fluid port, selector valve oil drain out, selector valve first actuator port and selector valve second actuator port, described selector valve oil drain out is communicated with described fuel tank (210), and described hydraulic control system also comprises:
The first pressure branch road (401), the described first pressure branch road (401) has connected state with the outlet of described cooling oil pump (220), and described selector valve pressure hydraulic fluid port is communicated with the described first pressure branch road (401);
Brake circuit (402), described selector valve first actuator port clamp (110) with described safety brake and are connected by described brake circuit (402);
The first cooling branch road (403) has connected state with described oil cooler (240), and described selector valve second actuator port is connected with the described first cooling branch road (403).
3. the hydraulic control system of hydraulic pressure tower machine according to claim 2 is characterized in that, described hydraulic control system also comprises:
One-way valve (350) is serially connected with described brake circuit (402), and the entry end of described one-way valve (350) is communicated with described selector valve first actuator port;
Accumulator (270) is connected on the described brake circuit (402) between described one-way valve (350) and the described safety brake pincers (110).
4. the hydraulic control system of hydraulic pressure tower machine according to claim 3, it is characterized in that, described selector valve (260) is solenoid directional control valve, described hydraulic control system also comprises controller and for detection of the pressure-detecting device (280) of described accumulator (270) pressure, described controller is electrically connected respectively with described selector valve (260) and described pressure-detecting device (280) respectively, selectively is communicated with described selector valve first actuator port and selector valve second actuator port with the described selector valve pressure hydraulic fluid port of controlling described selector valve (260).
5. the hydraulic control system of hydraulic pressure tower machine according to claim 3, it is characterized in that, described hydraulic control system also comprises first relief valve (330), the entry end of described first relief valve (330) is communicated with described selector valve first actuator port, and the outlet end of described first relief valve (330) is communicated with described fuel tank (210).
6. the hydraulic control system of hydraulic pressure tower machine according to claim 3, it is characterized in that, described hydraulic control system also comprises switch valve (320), one end of described switch valve (320) clamps (110) filler opening end with described safety brake and is communicated with, and second end of described switch valve (320) is communicated with described fuel tank (210).
7. the hydraulic control system of hydraulic pressure tower machine according to claim 1, it is characterized in that, described hydraulic control system also comprises the jacking cylinder (50) for the climbing frame (120) of the described hydraulic pressure tower of jacking machine, and the hydraulic oil in the described fuel tank (210) flows to described jacking cylinder (50) via described cooling oil pump (220).
8. according to the hydraulic control system of each described hydraulic pressure tower machine in the claim 2 to 6, it is characterized in that, described hydraulic control system also comprises the jacking cylinder (50) for the climbing frame (120) of the described hydraulic pressure tower of jacking machine, and the hydraulic oil in the described fuel tank (210) flows to described jacking cylinder (50) via described cooling oil pump (220).
9. the hydraulic control system of hydraulic pressure tower machine according to claim 8, it is characterized in that, described hydraulic control system also comprises multi-way valve (310), and described multi-way valve (310) will selectively be delivered to filler opening and the described jacking cylinder (50) of described oil cooler (240) from the described hydraulic oil of described cooling oil pump (220) outlet.
10. the hydraulic control system of hydraulic pressure tower machine according to claim 9, it is characterized in that, described multi-way valve (310) comprises the multi-way valve first pressure hydraulic fluid port, multi-way valve oil drain out, multi-way valve first actuator port and multi-way valve second actuator port, described multi-way valve oil drain out and described oil cooler (240) have connected state, and described hydraulic control system also comprises:
The second pressure branch road (406), the described second pressure branch road (406) has connected state with the outlet of described cooling oil pump (220), and the described multi-way valve first pressure hydraulic fluid port is communicated with the described second pressure branch road (406);
The first jacking oil circuit (407) connects the rodless cavity of described multi-way valve first actuator port and described jacking cylinder (50);
The second jacking oil circuit (408) connects the rod chamber of described multi-way valve second actuator port and described jacking cylinder (50).
11. the hydraulic control system of hydraulic pressure tower machine according to claim 10, it is characterized in that, described hydraulic control system also comprises the second cooling branch road (409), the described second cooling branch road (409) has connected state with described oil cooler (240), and described multi-way valve oil drain out is communicated with the described second cooling branch road (409).
12. the hydraulic control system of hydraulic pressure tower machine according to claim 11 is characterized in that, described hydraulic control system also comprises:
Principal pressure oil circuit (410), described principal pressure oil circuit (410) is connected with the outlet of described cooling oil pump (220);
The first oil circuit changing valve (250), the described first oil circuit changing valve (250) comprises three first valve connection mouths, and described three first valve connection mouths are connected with described principal pressure oil circuit (410), the described first pressure branch road (401) and the described second pressure branch road (406) respectively.
13. the hydraulic control system of hydraulic pressure tower machine according to claim 12 is characterized in that, described hydraulic control system also comprises:
Main cooling oil circuit (411), described main cooling oil circuit (411) is connected with the filler opening of described oil cooler (240);
The second oil circuit changing valve (290), the described second oil circuit changing valve (290) comprises three second valve connection mouths, and described three second valve connection mouths are connected with described main cooling oil circuit (411), the described first cooling branch road (403) and the described second cooling branch road (409) respectively.
14. the hydraulic control system of hydraulic pressure tower machine according to claim 13, it is characterized in that, described multi-way valve (310) also comprises the multi-way valve second pressure hydraulic fluid port and multi-way valve the 3rd actuator port, the described multi-way valve second pressure hydraulic fluid port is communicated with the described second pressure branch road (406), and described multi-way valve the 3rd actuator port is communicated with the described second cooling branch road (409); And, when the control spool of described multi-way valve (310) is in meta, the described multi-way valve second pressure hydraulic fluid port is communicated with described multi-way valve the 3rd actuator port, described multi-way valve first actuator port is communicated with described multi-way valve oil drain out, and the described multi-way valve first pressure hydraulic fluid port and described multi-way valve second actuator port disconnect.
15. the hydraulic control system of hydraulic pressure tower machine according to claim 11, it is characterized in that, described hydraulic control system also comprises second relief valve (340), the entry end of described second relief valve (340) is communicated with the described second pressure branch road (406), and the outlet end of described second relief valve (340) is communicated with the described second cooling branch road (409).
16. the hydraulic control system of hydraulic pressure tower machine according to claim 14, it is characterized in that, described hydraulic control system also comprises second relief valve (340), the entry end of described second relief valve (340) is communicated with described multi-way valve pressure hydraulic fluid port, and the outlet end of described second relief valve (340) is communicated with described multi-way valve oil drain out.
17. a hydraulic pressure tower machine comprises hydraulic control system, it is characterized in that, described hydraulic control system is the hydraulic control system according to each described hydraulic pressure tower machine in the claim 1 to 16.
18. hydraulic pressure tower machine, comprise balance arm (20), pivoting support (60) and hydraulic control system, it is characterized in that, described hydraulic control system is the hydraulic control system according to each described hydraulic pressure tower machine in the claim 7 to 12, cooling oil pump (220) is arranged on the described balance arm (20), and the every oil pipe that is arranged between described cooling oil pump (220) and the jacking cylinder (50) of described hydraulic control system is located to disconnect at described pivoting support (60), and in gap configuration rapid pipe joint.
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| CN201310169198.1A CN103233927B (en) | 2013-05-09 | 2013-05-09 | Hydraulic control system of hydraulic tower crane and hydraulic tower crane |
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| CN103883573A (en) * | 2014-02-12 | 2014-06-25 | 中国神华能源股份有限公司 | Hydraulic boom control system and harbor handling machine |
| CN105398977A (en) * | 2015-12-09 | 2016-03-16 | 贵州枫阳液压有限责任公司 | Tower crane brake unit |
| CN105443473A (en) * | 2015-12-29 | 2016-03-30 | 南京浦镇海泰制动设备有限公司 | Hydraulic oil supplying system |
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