Track type multiple character tower crane
The utility model is a kind of track-type multi-function tower crane, is specially adapted to the lifting operation of 50,000 to 600,000 kilowatts of fired power generating unit power constructions.
Tower crane is of a great variety in the world at present, most tower cranes, as: rail mounted, stand alone type, adhesion type, inner climbing type or the like tower crane, its lifting characteristic all is a mono-, has only a kind of work pattern.Because the building site complicated condition, the construction object is changeable, and unit in charge of construction is difficult to adapt to requirement, especially in large-scale construction project, and the tower crane that the value of use is millions of.Because of above-mentioned reason, its degree of utilization is lower, and economic benefit obviously is affected.In traveling tower crane, rail mounted can be with and carry walking.Stable working easily realizes very big load-carrying ability, and cost is low, easy to maintenance.And truck mounted, crawler type, rubber tired crane all exist not stationarity in moving and maybe can not be with and carry walking.Because the restriction of span and the requirement of overload protection generally mostly are large-tonnage and fix, little tonnage moves, and can not give full play to the Inherent advantage of traveling tower crane.
Along with tower crane by little to greatly, to the heavy type development, crane arm is by the exhibition of short long hair by gently, work speed develops from low to high, is developed to multiple use by special purpose.Particularly, sufficiently and reasonably brought into play the lifting characteristic of tower crane, enlarged range of use by of the development of single lifting characteristic to multiple lifting characteristic.
External at present existing many characteristics of compound type tower crane is used for crawler-mounted tower crane and vehicle tower crane.Employing combination jib is arranged in pairs or groups by various combination length principal arm and auxiliary, and obtains the type of different lifting characteristics.But because the wheelspan of crawler vehicle span and automobile all is restricted, although adopted telescopic span chassis structure, certain limit is arranged eventually, and scope is very little, the factor when travelling in the lifting is extremely difficult estimates that unstability is arranged slightly, just causes serious roll-over accident.Because span is narrow, disk diameter is restricted, and in order to increase stability, should change the quantity of counterbalanced weight when assembly unit, needs the adapted lifting appliance again.The various factors of numerous rope like this, the factor that still in many characteristics, exists very inconvenience and can not demonstrate fully.
The purpose of this utility model will design a kind of later-model tower crane exactly, various combination that can the major and minor arm of conversion, with minimum accessory, realize the type of a lot of heavy characteristics, can both be with under the various tonnages in the lifting and carry walking, the work balance, safe and reliable, change type and need not change balance weight.From removing many characteristics rail-mounted tower crane of erectting.
Characteristics of the present utility model are:
1, the many feature structures with external crawler-mounted tower crane and vehicle tower crane are used for the rail-mounted tower crane that China is being extensive use of, thereby constitute particular structure, and the maximum type of DBQ type is the DBQ3000 type.
2, installation is very convenient, makes the large-scale tower crane up to 130 meters behind the various combination, can realize having removed voluntarily once mounting, and this has the variation of matter to tall and big especially tower crane.
The rail-mounted tower crane that employing is made up of various mechanical equipments (4), principal arm (5), auxiliary (6), various carrying drag-line (7), counterbalanced weight (8), lifting hook (9), electronic type limiter of moment (10), amplitude detecting device (11), height limiter (12) or the like on track (1), door frame (2), pivoting support (3), the board can reach the purpose of this utility model.
Fig. 1, Fig. 2 are two kinds of different operatings combination of the present utility model.The following structure of principal arm (5) is just the same.
Figure 1 shows that single work pattern with the principal arm lifting.
The door frame (2) that 12 meters of spans are arranged on the track (1), pivoting support (3) is housed on the door frame (2), comprehensive 360 degree revolutions, the various mechanical equipments of this machine (4) are housed on the pivoting support (3), wherein hoist, span winch and from removing winch (span winch) or the like, various operations and control convenience are housed in the control cabin.And limiter of moment etc.Principal arm (5) is housed on the pivoting support (3), counterbalanced weight (8), by carrying drag-line (7) that principal arm (5) is cocked, there is lifting hook (9) on (luffing) principal arm top.Single principal arm (5) of using lifts by crane, and need not change counterbalanced weight (8), and principal arm (5) has 7 kinds of different lengths: 30 meters, 36 meters, 42 meters, 48 meters, 54 meters, 60 meters, 66 meters, form 7 kinds of different type of machines respectively, and work range can be by 12.7 meters～60 meters.The principal arm lifting operation can be with and carry along track travel stable working.
The tower work pattern of forming when Figure 2 shows that principal arm, auxiliary co-operation.
Under principal arm working condition shown in Figure 1, change the principal arm head, by carrying drag-line (7) tipping auxiliary (6).Electronic type limiter of moment (10) equally also is installed, and the linearity potentiometer of amplitude detecting device (11), begins operation after making principal arm arrival assigned position from removing.Auxiliary (6) has 6 kinds of different lengths: 24 meters, 30 meters, 36 meters, 42 meters, 48 meters, 54 meters.Can be combined to 42 kinds of different operating patterns with 7 kinds of different lengths of principal arm.Because the collocation of the long auxiliary of short principal arm is imappropriate, have 6 kinds of collocation need not, 36 kinds of actual uses.
Two kinds of structure types of Fig. 1, Fig. 2 are formed 36+7=43 kind type altogether, reached a tractor serves several purposes, there is such rail-mounted tower crane in unit in charge of construction, then can also can require combination in any according to different liftings in an engineering according to different engine request combination in any.The utility model lifting altitude can reach 124 meters, 3340 tons of rice of maximum hoisting moment, 160 tons of the biggest lifting capacities, 60 meters of maximum functional amplitudes.
Because gauge (1) span can reach 12 meters, rotary disk (3) diameter is big, the baseplane is steady, band carries walking safety, stable working, during the change combination form, needn't change balance weight quantity, having solved simultaneously crawler type and vehicle tower crane large-tonnage can not be with carrying the not enough of walking and having saved numerous rope operation of balance weight conversion. Because span is big, rotary disk is big,, still can be with and carry smooth running freely during up to 130 meters in tower work. The appearance of this unique texture has thoroughly improved the deficiency of existing equipment, has improved operating efficiency.
This machine is up to 130 meters, can be from removing setting during installation, and do not need other lifting appliance, and to tall and big equipment like this, not plain sailing. With the span winch of principal arm work, as certainly removing the time-out winch, when design, guaranteed to have removed operation and normal uniformity, make its coordination, safe and reliable, when meeting strong wind, can in time fall with reliable wind sheltering.
The jib structure of principal arm (5) and auxiliary (6), all adopt pipe truss structure load big, the Accurate analysis result of study shows, reasonable in design, owing to all adopt tubular joist structure, very complicated head, the root of assembly relation all adopts the space tubular construction, and multitube intersection has used multitube cast steel joint. This measure greatly alleviates weight. Such as 54 meters long auxiliarys, only weigh 17 tons, and 42 of close another kind of tower machine meters long crane arm deadweights are 22 tons with it, by every meter deadweight, the former is the latter's 60%, has saved steel.
The use of many characteristics electronic type moment system device processed (10) and amplitude detecting device (11) makes this machine particularly outstanding aspect safeguard protection. Adopted the electronic simulation technology, with hardware store 43 kinds of lifting performance curves of this machine. After determining, the jib combination form can select by knob. During work, except providing lifting capacity, amplitude, comprehensively leaning forward the indication of moment percentage, can also provide heavily, the underloading signal, to determine the making load fast lifting. The moment Times well that transfinites, Give the operator greatly convenient. Because linear potentiometer has been used in the amplitude sampling, the certainty of measurement height, circuit element has adopted integrated operational amplifier, has reduced zero and has waftd, and has improved the hardware versatility, takes special measure, and the inhibition zero temperature is waftd and momentary load is impacted, and has strengthened stability of instrument. This machine increases again above-mentioned instrument except common various safety caging devices, the in-local safety in utilization is greatly improved.
This machine can also be used for the hoisting operation of the large-engineerings such as petrochemical industry, metallurgy, is a kind of large-scale lifting appliance with broad applicability.