CN202016806U - Jacking structure of tower type crane and hydraulic system thereof - Google Patents
Jacking structure of tower type crane and hydraulic system thereof Download PDFInfo
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- CN202016806U CN202016806U CN2011200529750U CN201120052975U CN202016806U CN 202016806 U CN202016806 U CN 202016806U CN 2011200529750 U CN2011200529750 U CN 2011200529750U CN 201120052975 U CN201120052975 U CN 201120052975U CN 202016806 U CN202016806 U CN 202016806U
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- 230000009194 climbing Effects 0.000 claims description 34
- 239000002828 fuel tank Substances 0.000 claims description 12
- 239000003921 oil Substances 0.000 abstract description 209
- 230000001360 synchronised effect Effects 0.000 abstract description 16
- 239000010720 hydraulic oil Substances 0.000 abstract description 15
- 230000001105 regulatory effect Effects 0.000 abstract 4
- 235000019198 oils Nutrition 0.000 description 203
- 238000000034 method Methods 0.000 description 7
- 210000002268 wool Anatomy 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 2
- 206010057071 Rectal tenesmus Diseases 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 208000012271 tenesmus Diseases 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 1
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000254 damaging effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002540 palm oil Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model provides a jacking structure of a tower type crane and a hydraulic system thereof. According to the hydraulic system of the jacking structure of the tower type crane, each of multiple cylinders is provided with a positive branch working oil circuit and a negative branch working oil circuit, the positive branch working oil circuit of each cylinder is provided with a positive speed regulating valve for adjusting positive flow speed of hydraulic oil, and the negative branch working oil circuit of each cylinder is provided with a negative speed regulating valve for adjusting negative flow speed of the hydraulic oil. The novel jacking structure of the tower type crane further comprises the hydraulic system. The positive speed regulating valve and the negative speed regulating valve of each cylinder control advancing and withdrawing speeds of the hydraulic oil on each cylinder branch working oil circuit and synchronous precision of the cylinders, synchronous jacking of the cylinders is realized by the aid of equal flow speeds of the cylinder branch working oil circuits, and the problem that multiple cylinders used by a tower type crane in the prior art cannot be synchronous during jacking is resolved.
Description
Technical field
The utility model relates to the hoisting crane field, in particular to a kind of climbing structure and hydraulic efficiency pressure system thereof of tower crane.
Background technology
What present most of self-raising tower crane all adopted is single cylinder jacking hydraulic efficiency pressure system, what the large tonnage self-raising tower crane of minority adopted is twin-tub jacking hydraulic efficiency pressure system, balance cock or hydraulic lock are rigidly attached on the cylinder body, reach explosion-proof purpose of contending with, guarantee safety.And if adopt aforesaid way for the self-raising tower crane of especially big tonnage, can make jacking cylinder enormous size and installation and maintenance inconvenience.
For the large-tonnage jack up tower machine of the multi-cylinder jacking operation more than two cylinders,, will there be following problem if also just simple the employing is rigidly attached to balance cock or hydraulic lock on the cylinder body:
1. the operation that can not guarantee each oil cylinder is synchronous, even because adopted measure of control synchronously such as synchronous valve, but can not guarantee also can cause asynchronous under the balance cock of each oil cylinder or the situation that hydraulic lock is opened simultaneously when oil cylinder starts.The synchronization accuracy of oil cylinder when jacking or piston rod stretch out depends on the control accuracy of synchronous valve; But when oil cylinder decline or piston rod withdrawal, synchronization accuracy also can be subjected to the influence of balance cock except the control accuracy of synchronous valve, and promptly there is this problem in the tower machine of existing employing twin-tub jacking operation.
2. adopt the jacking cylinder of hydraulic lock, because the rodless cavity of each oil cylinder is by separately hydraulic lock locking, in case some hydraulic lock fail in time to open, the pull-back forces that the weight of the then whole frame that climbs is added other oil cylinder acts on this oil cylinder simultaneously, superpressure is suppressed cylinder can constitute serious potential safety hazard to the infringement of this damaging property of oil cylinder.
The utility model content
The utility model aims to provide a kind of climbing structure and hydraulic efficiency pressure system thereof of tower crane, problem that can not synchronized operation when solving that tower crane uses the heavy wool cylinder to carry out jacking in the prior art.
To achieve these goals, according to an aspect of the present utility model, a kind of hydraulic efficiency pressure system of climbing structure of tower crane is provided, be used to drive body of the tower rising or the decline of frame of climbing of tower crane at tower crane, hydraulic efficiency pressure system comprises a plurality of oil cylinders, and oil cylinder connects the jacking crossbeam and the entablatrance of tower crane respectively; Wherein, each oil cylinder in a plurality of oil cylinders has forward and props up the work oil circuit and oppositely prop up the work oil circuit, the forward of each oil cylinder props up the forward governor valve that the work oil circuit is provided with modulated pressure oil forward flow velocity, and an oppositely work oil circuit of each oil cylinder is provided with the reverse governor valve of modulated pressure oil reverse flow.
Further, the hydraulic efficiency pressure system of climbing structure comprises that also being arranged on each forward props up balance cock on the work oil circuit.
Further, described balance cock comprises oil inlet, oil outlet and control port, described oil inlet props up the work oil circuit with described forward and is connected, one of the rodless cavity of described oil outlet and described oil cylinder and rod chamber are connected, and described control port is connected with in described reverse work oil circuit and rodless cavity and the rod chamber another.
Further, hydraulic efficiency pressure system also comprises respectively props up the work oil circuit and oppositely props up the working connection that the work oil circuit is connected with forward, also be provided with the pilot check valve on the working connection, the pilot check valve props up the work oil circuit with the forward of each oil cylinder respectively and is connected, and the unlatching of pilot check valve is than the unlatching ratio less than each balance cock.
Further, the forward of each oil cylinder props up the work oil circuit and oppositely is equipped with shutoff valve on the work oil circuit.
Further, a plurality of oil cylinders are connected in parallel on the fuel tank, hydraulic efficiency pressure system also comprises the working connection that is connected between fuel tank and a plurality of oil cylinder, working connection props up the work oil circuit and oppositely props up a work oil circuit with forward and all is communicated with, also be provided with combine valve on the working connection, combine valve inside comprises combined directional valve and the combination by pass valve that is interconnected.
Further, working connection is provided with and the series connected back pressure valve of fuel tank, and back pressure valve is connected with a reverse work oil circuit.
Further, working connection is provided with by pass valve, and by pass valve is connected with a reverse work oil circuit.
Further, the number of a plurality of oil cylinders is six, and body of the tower has two sides and the front and the back side that link to each other with two sides, is connected two oil cylinders that climb between frame and the jacking crossbeam respectively being provided with on each side and the back side.
The utility model also provides a kind of climbing structure of tower crane, comprise body of the tower and the frame that climbs that is arranged on the body of the tower top, body of the tower is provided with marks time, and the bottom of jacking crossbeam is connected with entablatrance, mark time and support the jacking crossbeam, also comprise hydraulic efficiency pressure system according to aforesaid climbing structure.
According to the technical solution of the utility model, can control each oil cylinder by forward governor valve on each oil cylinder and reverse governor valve and prop up the advance and retreat speed of the hydraulic oil on the work oil circuit and the synchronization accuracy of each oil cylinder, prop up the synchronization of jacking up of each oil cylinder of the equal realization of flow velocity on the work oil circuit by each oil cylinder, thereby solved when tower crane uses the heavy wool cylinder to carry out jacking in the prior art can not be synchronous problem, overcome the effect bad problem that prior art is used synchronous valve.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the principle of work scheme drawing according to the climbing structure of the tower crane of the utility model embodiment;
Fig. 2 shows the structure according to the hydraulic efficiency pressure system of the climbing structure of the tower crane of the utility model embodiment;
Fig. 3 shows according to the structure on the back side plane of the climbing structure of the tower crane of the utility model embodiment;
Fig. 4 shows according to the structure on the lateral plane of the climbing structure of the tower crane of the utility model embodiment;
Fig. 5 shows according to the structure on the positive facial plane of the climbing structure of the tower crane of the utility model embodiment; And
Fig. 6 shows the structure according to the jacking crossbeam of the tower crane of the utility model embodiment.
The specific embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Figure 1, drive frame 31 lifting on the body of the tower 39 of tower crane of climbing of tower crane by the hydraulic efficiency pressure system of climbing structure according to the tower crane of the utility model embodiment, for example, the frame 31 that climbs is subjected to the support and the driving of hydraulic efficiency pressure system, by the guide wheel on the body of the tower 39 32 lifting on body of the tower 39.Hydraulic efficiency pressure system comprises a plurality of oil cylinders 15, for example can comprise: two, three, four, six or eight oil cylinders, when adopting the oil cylinder 15 of above-mentioned quantity, oil cylinder 15 easy arrangement, when for example comprising two oil cylinders 15, two oil cylinders 15 can be arranged in a side or the both sides of the frame 31 that climbs.The piston rod of each oil cylinder 15 and cylinder barrel are connected the jacking crossbeam 35 and the entablatrance 34 of tower crane respectively, wherein, entablatrance 34 is fixed on the frame 31 that climbs, jacking crossbeam 35 is removably captiveed joint with each standard knot, when the frame 31 that promptly climbs climbs, the standard knot of jacking crossbeam 35 and top is connected, and after having increased new standard knot, jacking crossbeam 35 separates with the primary standard joint and is connected with the standard knot that increases newly.In the process of frame 31 jackings of climbing, can utilize link plate 33 the climb support of frame 31 and the location of the frame 31 that climbs, thereby can adjust the position of jacking crossbeam 35.The body of the tower 39 of tower crane is provided with marks time 37, and after jacking finished, marking time 37 supported jacking crossbeam 35 and spacing to jacking crossbeam 35, prevents that jacking crossbeam 35 from moving, to guarantee the safety of tower crane.
As shown in Figure 2, according to an embodiment of the present utility model, comprise six oil cylinders 15 in the hydraulic efficiency pressure system, each oil cylinder model can be identical with structure, each oil cylinder in these a plurality of oil cylinders 15 has forward and props up the work oil circuit and oppositely prop up the work oil circuit, is respectively applied for the rodless cavity of the corresponding oil cylinder 15 of control and the motion of rod chamber.This hydraulic efficiency pressure system also comprises with forward props up the work oil circuit and oppositely props up the working connection 21 that the work oil circuit all is connected.In the present embodiment, working connection 21 comprise with each forward prop up first working connection that the work oil circuit is connected and with each reverse second working connection of being connected of work oil circuit.Wherein, the end that forward props up the work oil circuit is connected with the rodless cavity of oil cylinder 15, the other end is connected with the fuel tank 1 of hydraulic efficiency pressure system by first working connection, oppositely an end of a work oil circuit is connected with the rod chamber of oil cylinder 15, and the other end is connected with the fuel tank 1 of hydraulic efficiency pressure system by second working connection.The forward of each oil cylinder 15 props up the work oil circuit and oppositely is respectively equipped with governor valve 14 on the work oil circuit, is arranged on the governor valve 14 that forward props up on the work branch road and is the forward governor valve, is used for the adjustment that forward props up the flow velocity of work oil circuit; The governor valve 14 that is arranged on the reverse work branch road is reverse governor valve, is used for oppositely propping up the adjustment of the flow velocity of work oil circuit.Have comparatively accurate scale on the governor valve 14, can control accurately the speed and the flow of the hydraulic oil in the working oil path.Be appreciated that the piston rod when oil cylinder 15 is connected to entablatrance 34, and cylinder barrel is when being connected to jacking crossbeam 35, forward props up the work oil circuit and should be communicated with rod chamber, is communicated with rodless cavity and oppositely prop up the work oil circuit.
Please consult Fig. 2 again, hydraulic efficiency pressure system also comprises oil pump 6 and drives the motor 7 of oil pump 6, and oil pump 6 is arranged on the working connection 21, and the one end is communicated with fuel tank 1, and the other end props up the work oil circuit with forward simultaneously and the reverse work oil circuit that props up is communicated with.
Concrete, as shown in Figure 2, the forward governor valve of six oil cylinders 15 is respectively A11, A12, and A13, A14, A15, A16, the reverse governor valve of six oil cylinders 15 is respectively B11, B12, B13, B14, B15, B16.The scale of outwarding winding by making the governor valve 14 on each branch road is identical, can control the advance and retreat speed of each oil cylinder and the synchronization accuracy of each oil cylinder respectively.The forward of each oil cylinder 15 props up the work oil circuit and sends to joint A mutually with first working connection of working connection 21, and an oppositely work oil circuit of each oil cylinder 15 is sent to joint B mutually with second working connection of working connection 21.Because governor valve 14 has good speed rigidity, in case its influence that changed by load and the pressure of pumping plant own is less after the speed setting, thereby the speed of its control is constant substantially, thereby can improve the synchronization accuracy of each oil cylinder 15 preferably.
Control each oil cylinder by forward governor valve on each oil cylinder 15 and reverse governor valve and prop up the advance and retreat speed of the hydraulic oil on the work oil circuit and the synchronization accuracy of each oil cylinder, the synchronous advance and retreat of propping up the hydraulic oil on the work oil circuit by each oil cylinder realize the synchronization of jacking up of each oil cylinder 15, thereby hydraulic efficiency pressure system of the present utility model solved that tower crane is difficult to use the heavy wool cylinder to carry out the problem of synchronization of jacking up in the prior art, overcome the bad problem of effect that prior art is used synchronous valve.Because the speed of oil cylinder jacking, decline is also inequality, thereby do not have to adopt by governor valve and four bridge rectifier synchronization loops that check valve is formed, but the rising of oil cylinder controlled respectively by two governor valves of each oil cylinder 15 usefulness and the speed of decline realizes synchronously, and promptly six oil cylinders 15 adopt 12 governor valves to realize speed governing and synchro control altogether.Accumulated synchronized error during each oil cylinder 15 synchronized operation can put in place by the operation of oil cylinder piston bar and be eliminated.
Preferably, as shown in Figure 2, hydraulic efficiency pressure system comprises that also being arranged on each forward props up balance cock 13 on the work oil circuit.Balance cock 13 comprises oil inlet, oil outlet and control port, oil inlet props up the work oil circuit with forward and is connected, one of the rodless cavity of oil outlet and oil cylinder and rod chamber are connected, and control port is connected with in oppositely a work oil circuit and rodless cavity and the rod chamber another.
According to an embodiment of the present utility model, oil inlet props up the work oil circuit with forward and is connected, and oil outlet is connected with the rodless cavity of oil cylinder, and control port is connected with the corresponding bar control port that has of oppositely propping up on work oil circuit and the rod chamber.Wherein, have bar control port to be arranged on the rod chamber of oil cylinder, by with being communicated with of balance cock 13, the pressure in the control rodless cavity is to reduce the consumption of idle work.Be provided with six balance cocks 13 altogether on having in the hydraulic efficiency pressure system of six oil cylinders 15, at the tower machine is that tower crane is when carrying out the operation of jacking supernumerary segment, in case when connecting a certain sebific duct blow-out of oil cylinder rodless cavity, rodless cavity is positioned at the frame 31 hypervelocity tenesmus of climbing on tower crane top because of rapid decompression the oil cylinder holder, under this situation, balance cock 13 will be closed, and oil cylinder is maintained, and guarantees the safe operation of tower machine.In addition, as shown in Figure 2, the control port of balance cock 13 is connected with the bar control port that has on the rod chamber, thereby regulates the operation pressure of rod chamber, to reduce energy consumption.
Preferably, as shown in Figure 2, a plurality of oil cylinders 15 are connected in parallel on the fuel tank 1, like this, can save the space, reduce the weight of tower machine.Second working connection of the working connection 21 of hydraulic efficiency pressure system is provided with and oil cylinder 15 series connected back pressure valves 11, and back pressure valve 11 oppositely props up a work oil circuit and is connected with each, and is connected with oil pump 6.
Preferably, as shown in Figure 2, hydraulic efficiency pressure system also comprises respectively props up the work oil circuit and oppositely props up the working connection 21 that the work oil circuit is connected with forward, also is provided with combine valve 9 on the working connection 21, and combine valve 9 inside comprise combined directional valve and the combination by pass valve that is interconnected.The oil inlet of combine valve 9 and oil pump 6 are communicated with, and oil outlet and forward prop up a work oil circuit and an oppositely work oil circuit connection.This hydraulic efficiency pressure system also comprises oil return circuit, and the oil outlet of this combine valve 9, forward prop up the work oil circuit and oppositely prop up the work oil circuit and directly be communicated with fuel tank 1 by this oil return circuit.
Preferably, as shown in Figure 2, hydraulic efficiency pressure system also comprises respectively props up the work oil circuit and oppositely props up the working connection 21 that the work oil circuit is connected with forward, also be provided with pilot check valve 12 on the working connection 21, pilot check valve 12 props up the work oil circuit with the forward of each oil cylinder 15 respectively and is connected, and the unlatching of pilot check valve 12 is than the unlatching ratio less than each balance cock 13.Propping up on first working connection that the work oil circuit is connected of each oil cylinder 15 pilot check valve 12 is set, guarantees that when tower crane lifting hydraulic oil only can unidirectional inflow forward props up in the work oil circuit and can not reflux with forward.The unlatching of pilot check valve 12 is than the unlatching ratio less than each balance cock 13, and promptly balance cock 13 is opened prior to pilot check valve 12, to reduce the startup error of oil cylinder 15.Further, pilot check valve 12 is arranged at combine valve 9 and forward props up between the work oil circuit.
In addition, another effect of pilot check valve 12 and balance cock 13 is to allow from the pumping plant to the oil cylinder 15 promptly to be full of oil from back pressure valve 11, pilot check valve 12 to all pipelines of oil cylinder 15, do not allow pipeline emptying,, guarantee that oil cylinder operates steadily and synchronously to avoid entering air.
Preferably, as shown in Figure 2, the forward of each oil cylinder props up the work oil circuit and oppositely is equipped with shutoff valve 16 on the work oil circuit.Be provided with 12 shutoff valves 16 on the oil circuit of six oil cylinders 15 altogether.Like this, can control the single action of single oil cylinder or the wherein interlock of any several oil cylinders; When oil cylinder need keep for a long time, can close each shutoff valve 16 simultaneously, make the working line no leak.
Preferably, working connection 21 is provided with by pass valve 10, and by pass valve 10 is connected with a reverse work oil circuit, and is connected with fuel tank 1.By pass valve 10 is connected with the rod chamber of oil cylinder 15 by oppositely propping up a work oil circuit, is used to reduce the interior pressure of rod chamber of oil cylinder 15, reduces idle work, improves the efficiency of total system.
The number of oil cylinder is six, preferably, extremely shown in Figure 5 as Fig. 3, body of the tower has two sides and the front and the back side that link to each other with two sides, be that body of the tower 39 has left surface 391, right flank 392, positive introduction face 393 and the back side 394, be connected two oil cylinders 15 that climb between frame 31 and the jacking crossbeam 35 respectively being provided with on each side and the back side, on the positive introduction face 393 of body of the tower, oil cylinder 15 is not set, so that the dead work of carrying out jacking at the positive introduction face 393 of body of the tower is for example introduced face 393 and is introduced the needed parts of some jacking work from the front.
This set is three six oil cylinder climbing structures of tower crane, and to shown in Figure 6, this climbing structure is made up of three jacking crossbeams 35, six roots of sensation jacking cylinder 15, hydraulic power unit 50 and hydralic hose 17 etc. as Fig. 2.Per two jacking cylinders 15 are connected to respectively on a jacking crossbeam 35 and the frame 31 that climbs by bearing pin, and every jacking cylinder 15 all is connected with hydraulic power unit 50 by hydralic hose 17.Three jacking crossbeams 35 are arranged in the opposite and the side of the standard knot introduction face of tower machine.Control by the jacking hydraulic efficiency pressure system, make the tower machine the time from jacking, every oil cylinder 15 operations synchronously, and the pressure unanimity of bearing, at tower machine jacking supernumerary segment with fall tower and subtract when joint, operate steadily, safe and reliable, and, per two oil cylinders, 15 shared jacking crossbeams 35, the needed bearing force of jacking is divided into six oil cylinders 15 to be supported, and 15 less top lifts of need of every jacking cylinder so just can adopt the less jacking cylinder commonly used of size, save cost and shared space, especially for large-scale or superhuge tower crane, for example, the super-huge tower crane of D5200-240 jack up, jacking weight is big, reach more than 800 ton, jacking crossbeam 35 can carry out jacking from weighing more than 4 tons at an easy rate by three six oil cylinder climbing structures, prior art then needs could realize by the method for complexity, and the cylinder phenomenon is suppressed in the easy existence of prior art.
In addition, the utility model is not limited to the set-up mode of three six oil cylinders, for example can be set to two sides two oil cylinders and two sides four oil cylinders are set on two sides, can also be set to three three oil cylinders.
Use three six oil cylinder climbing structures, the tower machine is from the jacking supernumerary segment or fall tower to subtract the step of joint as follows:
1, start hydraulic power unit 50, stretch out oil cylinder 15 with three jacking crossbeams 35 hang over nearest one group mark time in, insert safety pin;
2, confirm errorless after, start hydraulic efficiency pressure system, piston rod is stretched out, frame 31 and with top jack-up will climb.
In the jacking process, by the control of hydraulic efficiency pressure system, six roots of sensation oil cylinder 15 is risen synchronously, and the pressure unanimity of bearing.
Use three six oil cylinder climbing structure groundwork process summaries:
When carrying out tower machine jacking operation, open drive motor 7, after hydraulic oil filters through filter 2, be delivered to combine valve 9 by high pressure pump 6, pull handle to position, a commutation left side, hydraulic oil freely passes through pilot check valve 12 and balance cock 13, enter the rodless cavity of oil cylinder 15, the jacking crossbeam 35 that at first will be connected the oil cylinder piston rod end falls into body of the tower and marks time, and allows six oil cylinder synchronizations of jacking up, and synchronization accuracy is adjusted by governor valve 14 in advance.
After synchronization of jacking up puts in place, pull the right position of reversing handle to combine valve 9, hydraulic oil freely passes through back pressure valve 11, and behind governor valve 14 synchronous variable-speeds, enter separately rod chamber, open the pilot check valve 12 that is arranged on first working connection from the control oil of second working connection simultaneously, oil cylinder heads on the frame 31 that climbs and descends, and the weight of whole tower machine upper obtains balance by adjusting balance cock 13, the frame 31 that climbs is fallen after rise operate steadily; Package link plate 33, this moment, the weight of whole tower machine upper was supported by link plate 33, and the piston rod contraction bands of oil cylinder 15 jacking crossbeam 35 and deviate from body of the tower synchronously and mark time then, and jacking crossbeam 35 rises.
After jacking is finished, the undersetting of tower crane will can be vacated the room of a standard knot with the standard knot top, at this moment, last rotating part will all be supported by the frame 31 that climbs, if refilling a joint standard knot this moment between standard knot top and the undersetting, the top of new clothes standard knot is connected with undersetting, and the bottom of new standard joint links to each other with original standard knot, and tower crane has just been finished the process of increasing like this.Tower crane will reduce when height, above process get final product on the contrary.
Jacking crossbeam 35 when oil cylinder piston bar band retracts to the upper class standard knot and marks time when top, reversing handle is got to position, a left side, the oil cylinder piston bar stretches out, and is being with jacking crossbeam 35 DL synchronizations to drop in the ditch of marking time, and the weight of jacking crossbeam 35 obtains balance by adjusting back pressure valve 11; Combine valve 9 handles continue to get to position, a left side, then repeat above-mentioned steps and can carry out secondary jacking operation.
Fall tower and subtract joint during operation when carrying out the tower machine, open CD-ROM drive motor 7, after hydraulic oil filters through filter 2, be delivered to combine valve 9 by high pressure pump 6, pull handle to position, a commutation left side, hydraulic oil freely passes through check valve 12 and balance cock 13, enter the rodless cavity of oil cylinder 15, the oil cylinder piston bar stretches out, the jacking crossbeam that is connected the oil cylinder piston rod end is fallen in the marking time of next joint of body of the tower synchronously, when continue synchronization of jacking up put in place and finish subtract standard knot after, pull the right position of reversing handle to combine valve 9, hydraulic oil freely passes through back pressure valve 11, and behind governor valve 14 synchronous variable-speeds, enter separately rod chamber, and open the check valve 12 on left road from the control oil of right wing simultaneously, oil cylinder heads on and moves the frame 31 that climbs and steadily fall after rise, package link plate then, the piston rod band the jacking crossbeam and is deviate to mark time synchronously; After oil cylinder piston bar band the jacking crossbeam and is deviate to mark time, reversing handle is got to left side position, and the oil cylinder piston bar stretches out, and is being with descending next joint that drops into of jacking crossbeam 35 to mark time in the ditch, combine valve 9 handles are got to position, a left side, then repeat above-mentioned steps and can carry out secondary joint operation that subtracts.
When the tower machine carries out the operation of jacking supernumerary segment, in case when connecting a certain sebific duct blow-out of oil cylinder rodless cavity, the rodless cavity frame 31 hypervelocity tenesmus of climbing because of rapid decompression is being held in the palm oil cylinder 15, balance cock 13 is closed, and oil cylinder 15 is maintained, and guarantees the safe operation of tower machine.
In hydraulic efficiency pressure system, the pressure of oil pump 50 outlet is set up by combine valve 9, generally sets by 1.15 times of actual jacking pressure, and the operation pressure of cylinder rod chamber is set up by by pass valve 10, and its force value is less than the pump discharge setup pressure value, to reduce energy consumption.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
The utility model for the tower machine of the multi-cylinder jacking operation more than need two cylinders at the jacking supernumerary segment and fall operate steadily when tower subtracts joint, safe and reliable, can not exist and suppress the cylinder phenomenon;
The utility model can well guarantee the basic synchronization of heavy wool cylinder, and the synchronization accuracy of heavy wool cylinder depends primarily on the control accuracy of governor valve, is not subjected to the influence of balance cock substantially.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. the hydraulic efficiency pressure system of the climbing structure of a tower crane, the frame that climbs that is used to drive tower crane rises or descends at the body of the tower of tower crane, it is characterized in that:
Described hydraulic efficiency pressure system comprises a plurality of oil cylinders, and described oil cylinder connects the jacking crossbeam and the entablatrance of described tower crane respectively;
Wherein, each described oil cylinder in described a plurality of oil cylinder has forward and props up the work oil circuit and oppositely prop up the work oil circuit, the described forward of each described oil cylinder props up the forward governor valve that the work oil circuit is provided with modulated pressure oil forward flow velocity, and described reverse work oil circuit of each described oil cylinder is provided with the reverse governor valve of modulated pressure oil reverse flow.
2. the hydraulic efficiency pressure system of climbing structure according to claim 1 is characterized in that, comprises that also being arranged on each described forward props up balance cock on the work oil circuit.
3. the hydraulic efficiency pressure system of climbing structure according to claim 2, it is characterized in that, described balance cock comprises oil inlet, oil outlet and control port, described oil inlet props up the work oil circuit with described forward and is connected, one of the rodless cavity of described oil outlet and described oil cylinder and rod chamber are connected, and described control port is connected with in described reverse work oil circuit and rodless cavity and the rod chamber another.
4. the hydraulic efficiency pressure system of climbing structure according to claim 3, it is characterized in that, described hydraulic efficiency pressure system also comprises respectively props up work oil circuit and described reverse the working connection that the work oil circuit is connected with described forward, also be provided with the pilot check valve on the described working connection, described pilot check valve props up the work oil circuit with the forward of each described oil cylinder respectively and is connected, and the unlatching of described pilot check valve is than the unlatching ratio less than each described balance cock.
5. the hydraulic efficiency pressure system of climbing structure according to claim 4 is characterized in that, the forward of each described oil cylinder props up the work oil circuit and oppositely is equipped with shutoff valve on the work oil circuit.
6. the hydraulic efficiency pressure system of climbing structure according to claim 1, it is characterized in that, described a plurality of oil cylinder is connected in parallel on the fuel tank, described hydraulic efficiency pressure system also comprises the working connection that is connected between described fuel tank and the described a plurality of oil cylinder, described working connection props up the work oil circuit and oppositely props up a work oil circuit with forward and all is communicated with, also be provided with combine valve on the described working connection, described combine valve inside comprises combined directional valve and the combination by pass valve that is interconnected.
7. the hydraulic efficiency pressure system of climbing structure according to claim 6 is characterized in that, described working connection is provided with and the series connected back pressure valve of described fuel tank, and described back pressure valve is connected with described reverse work oil circuit.
8. the hydraulic efficiency pressure system of climbing structure according to claim 6 is characterized in that, described working connection is provided with by pass valve, and described by pass valve is connected with described reverse work oil circuit.
9. according to the hydraulic efficiency pressure system of each described climbing structure in the claim 1 to 8, it is characterized in that, the number of described a plurality of oil cylinders is six, described body of the tower has two sides and the front and the back side that link to each other with described two sides, is connected described two oil cylinders that climb between frame and the described jacking crossbeam respectively being provided with on each the described side and the described back side.
10. the climbing structure of a tower crane, comprise body of the tower and the frame that climbs that is arranged on described body of the tower top, described body of the tower is provided with marks time, the bottom of jacking crossbeam is connected with entablatrance, described marking time supported described jacking crossbeam, it is characterized in that: also comprise the hydraulic efficiency pressure system according to each described climbing structure in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200529750U CN202016806U (en) | 2011-03-02 | 2011-03-02 | Jacking structure of tower type crane and hydraulic system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200529750U CN202016806U (en) | 2011-03-02 | 2011-03-02 | Jacking structure of tower type crane and hydraulic system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173363A (en) * | 2011-03-02 | 2011-09-07 | 长沙中联重工科技发展股份有限公司 | Jacking structure of tower crane and hydraulic system and jacking method thereof |
| CN103569882A (en) * | 2013-11-19 | 2014-02-12 | 南京工业大学 | Hydraulic jacking system of attached tower crane |
| CN109654076A (en) * | 2018-12-14 | 2019-04-19 | 中联重科股份有限公司 | Multi-oil-cylinder synchronous jacking system for tower crane and tower crane |
| CN110921525A (en) * | 2019-11-27 | 2020-03-27 | 湖南中联重科建筑起重机械有限责任公司 | Continuous alternate lifting method, control oil way, hydraulic system and crane |
-
2011
- 2011-03-02 CN CN2011200529750U patent/CN202016806U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173363A (en) * | 2011-03-02 | 2011-09-07 | 长沙中联重工科技发展股份有限公司 | Jacking structure of tower crane and hydraulic system and jacking method thereof |
| WO2012116537A1 (en) * | 2011-03-02 | 2012-09-07 | 长沙中联重工科技发展股份有限公司 | Lifting structure of tower crane, hydraulic system of lifting structure, and lifting method |
| CN102173363B (en) * | 2011-03-02 | 2013-09-18 | 中联重科股份有限公司 | Jacking structure of tower crane, hydraulic system and jacking method thereof |
| CN103569882A (en) * | 2013-11-19 | 2014-02-12 | 南京工业大学 | Hydraulic jacking system of attached tower crane |
| CN103569882B (en) * | 2013-11-19 | 2015-03-11 | 南京工业大学 | Hydraulic jacking system of attached tower crane |
| CN109654076A (en) * | 2018-12-14 | 2019-04-19 | 中联重科股份有限公司 | Multi-oil-cylinder synchronous jacking system for tower crane and tower crane |
| CN110921525A (en) * | 2019-11-27 | 2020-03-27 | 湖南中联重科建筑起重机械有限责任公司 | Continuous alternate lifting method, control oil way, hydraulic system and crane |
| CN110921525B (en) * | 2019-11-27 | 2021-08-10 | 湖南中联重科建筑起重机械有限责任公司 | Continuous alternate lifting method, control oil way, hydraulic system and crane |
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Address after: 410013 No. 361 South silver basin, Hunan, Changsha Co-patentee after: CHINA RAILWAY MAJOR BRIDGE ENGINEERING Co.,Ltd. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410013 No. 361 South silver basin, Hunan, Changsha Co-patentee before: CHINA RAILWAY MAJOR BRIDGE ENGINEERING Co.,Ltd. Patentee before: CHANGSHA ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Granted publication date: 20111026 |
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