High tower crane tire structure

High tower crane tire tire crane substructure is basically the same with the ordinary. The difference is that the former place in the latter mounted jib up the school installed a p-frame is installed into place two hydraulic cylinders pull up the school. Install boom in the middle column.

 High pallet jacks crane tire tire crane substructure is basically the same with the ordinary. The difference is that the former place in the latter mounted jib up the school installed a p-frame is installed into place two hydraulic cylinders pull up the school. Install boom in the middle column. This crane metal structure composed of the following parts.
     1. Trolley frame
     Crane with steel frame with steel welded into a box-shaped (or slab) structure, the travel drive, transmission device mounted on the support frame mounted umbrella holder r6 rotary support, bracket mounted to the frame at the front and rear end beam. Material generally use low-Jin Gaoqiang degree structural steel. Because although the number of products to be certain counterweight could be considered ordinary carbon steel frame.
    2. Turntable
     Crane turntable structure similar to ordinary tires. To install the mounting arm at school legislation, the tail with significant support beams a ship with a high-strength low-alloy structural steel made ​​with good strength and rigidity of the box-shaped structure.
     3. Column
     Mainly from the text column order jib role that requires a certain column height to install compensate pulley. Column one small ship, I asked for the two big large section box structure to ensure good torsion resistance.
     4. Boom
     The boom of the crane truss structure, the main square seamless multi-chord vessels with paragraph 2 and pin hinge.

High tower crane tires manipulation and protection

High tower crane tires with full hydraulic transmission , mechanical , simple structure , light weight , low energy consumption , easy maintenance , smooth, impact, centralized control , with good speed performance .

 1 . Crane operation
    High tower crane tires electrics tacker , lying pJ treasure while driving , but also in unchanging central control room. These two sets of lifting sail the whole system can be manipulated , all instruments are located in the cab and the control room , from the weight ( lifting moment ) , work rate and other relevant data in the cab or the control room display.
 2 . Safety devices
    ( 1 ) machine . ① emergency stop switch ; ⑦ hydraulic oil tank is less than five requirements protector ; ① liquid Qing oil temperature is higher than a predetermined value and gear warning devices ; ④ hydraulic safety valve ; ⑤ alarm . In addition to the alarm , the other devices installed in the cab or the control room , the driver can at any time depending on the circumstances to take corresponding measures .
    ( 2 ) engine . ① starting system electrical mechanical interlock ; ⑦ speed stabilizer ; ⑤ low engine oil pressure protection device ; ④ cooling water temperature is too high or too low warning devices ; ⑤ fuel indicating device ; ⑧ air filter replacement indicating device .

starting system electrical mechanical interlock

  ( 2 ) engine . ① starting system electrical mechanical interlock ; ⑦ speed stabilizer ; ⑤ low engine oil pressure protection device ; ④ cooling water temperature is too high or too low warning devices ; ⑤ fuel indicating device ; ⑧ air filter replacement indicating device .
    ( 3 ) lifting mechanism . ① ultra- load protection device ; ② main pump hydraulic system pressure exceeds the pressure of the safety relief valve to allow and lighting Electric pallet truck '② Automatic brake adjustment and automatic adaptive devices ' ① lifting height limiting device .
   ( 4 ) luffing mechanism . ① amplitude (Rh, s one day "n) limiting device ( two-stage limit : an alarm , two braking ); ② column vertical position indication and limit device ; ② unchanging position down to the limit and stop instructions means ' ④ hydraulic system relief valve .
    ( 5 ) rotating mechanism . ① rotating mechanism locking device ; ② rotation speed limit risk * ③ rotating mechanism mounted emergency brake installed
Home ; ① hydraulic power failure protection device ; ③ elastic limit torque clutch .
    ( 6 ) driving mechanism . ① lights, brake , guitar sound device ; ② outrigger safety protection device.
    ( 7 ) container spreader safety protection device.
    High tower crane tires with full hydraulic transmission , mechanical , simple structure , light weight , low energy consumption , easy maintenance , smooth, impact, centralized control , with good speed performance . This model in practice the rejection of the other crane gradually reflect various advantages . Due to its versatility , adaptability and flexibility , it is a promising development sail type .

the engine rated speed

  (1) The most basic scissor pallet truck and the long arm of the corresponding minimum and maximum working range of the amplitude, the engine rated speed, no load.
     (2) the most basic arm and the long arm of the maximum working range, the corresponding nominal weight, the engine rated speed.
     2. Debugging method
     In the condition (1), looked up and whereabouts jib cranes throughout, from the determination of the whereabouts of Yang and boom times, and the maximum hydraulic luffing process and current values​​.
     In the condition (2), jib crane towels looked to the minimum operating speed range, medium-speed pipe rack to fall into place. Determination of the time required for landing pipe rack and the maximum stable oil pressure and current constant.
     (Four) Xiao frame telescopic mechanism
     1. Debug condition
     Boom elevation 50. Engine rated speed, no load
     2. Debugging method
     Determination of the entire boom extension (reduced) and the maximum time required for oil (current) value. The need for manual or mechanical assistance in order to achieve the boom extension (contraction), allowing measurement of elongation classification (shrink) time and the maximum pressure and current values​​; maximize the use of automatic recorder for recording.

debug condition

 (1) The most basic Electric pallet truck and the long arm of the corresponding minimum and maximum working range of the amplitude, the engine rated speed, no load.
     (2) the most basic arm and the long arm of the maximum working range, the corresponding nominal weight, the engine rated speed.
     2. Debugging method
     In the condition (1), looked up and whereabouts jib cranes throughout, from the determination of the whereabouts of Yang and boom times, and the maximum hydraulic luffing process and current values​​.
     In the condition (2), jib crane towels looked to the minimum operating speed range, medium-speed pipe rack to fall into place. Determination of the time required for landing pipe rack and the maximum stable oil pressure and current constant.
     (Four) Xiao frame telescopic mechanism
     1. Debug condition
     Boom elevation 50. Engine rated speed, no load
     2. Debugging method
     Determination of the entire boom extension (reduced) and the maximum time required for oil (current) value. The need for manual or mechanical assistance in order to achieve the boom extension (contraction), allowing measurement of elongation classification (shrink) time and the maximum pressure and current values​​; maximize the use of automatic recorder for recording.

Commissioning bodies wheeled cranes

This paper describes the debugging methods wheeled cranes, pay attention to when debugging to make a record, and precautions
(A) Lifting mechanism
1. Debug condition
(1) basic boom, pulley maximum magnification, no load.
(2) basic boom, pulley maximum magnification, the maximum rated capacity
(3) to the maximum line pull.
     (4) the maximum line pull Heng l / 5.
     2. Debugging method
     When the engine is rated speed, in the fully open position joystick uniform lifting (-1; descending) test load, measured at the time of the trip A2 plexus, pallet jacks output oil pressure, flow rate (speed), or generator output current, voltage. Calculate the nominal single rope speed, maximum rated lifting reorganization Scissor lift (Factory descending) drive power transmission efficiency, and load lifting (decrease) when the power and efficiency.
     (Two) slewing mechanism
     1. Debug condition
     (1) basic boom, maximum elevation, no load, the engine rated speed.
     (2) basic boom, the maximum rated capacity, the corresponding nominal amplitude, safe rotation speed.
     (3) basic boom, the maximum rated capacity, the corresponding nominal range, the minimum steady speed.
     2. Debugging method
     Determination of uniform rotation when the rotation angle (factor), turnaround time, the hydraulic pump output, flow voltage. Calculated rotation speed, power.

The minimum steady speed wheeled crane commissioning

This is the minimum steady speed of wheeled cranes debug introduced into working conditions, methods and requirements of three parts
1. Debug condition
Base pipe frame, engine rated speed, rated amplitude maximum rated lifting weight lifting
2. Debugging method
     Manipulation engine throttle control movement speed and other institutions * are the lifting, down, left and right turning movements reach a steady speed as low as possible. Determination of uniform through - determine the distance required time period, lifting movement distance of not less than 1m, rotary motion angle of not less than 180. , Were calculated from the rise, fall, swing the minimum steady speed, and with the requirements of crane design data comparison.
3. Requirements for commissioning
(A) single rope Hand pallet jacks rated speed, rated rotation speed, no load rotation speed is not less than the design value.
(2> The maximum rated lifting capacity crane operations, lifting, and turning down the minimum steady speed shall not exceed the total community