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How do you test an overhead crane?
ZZHZ.COMBefore taking the test running, check that the positive and negative directions of the motors are line with the demands, especially the two motors of the overhead crane traveling mechanism must rotate at the same direction.Begin the test running while the overhead crane is under the safety and normal condition. At the same time, the control handle is at null position. Turn on the knife-type switch and push the starting button of SB1. Connect the circuit and make the overhead crane in the condition ready for running.There are 3 steps for the test running:1. No-load test：The procedures and requirements are the following：1）Make the hoist traveling with no load along the rail 3 times to check no track-slipping of the wheels obviously. The starting and braking conditions are normal; the limit switches act correctly; the buffer in the hoist can collide with the bumper in the bridge structure accurately.2）Hoist with no load test: make the hoist with hook up and down 3 times to make sure that the limit switches of the lifting mechanism act correct and reliable.3）Travel the hoist to the middle point of the span, then travel the crane moving along the rail twice at the lower speed to check the supporting legs and rails. Make the overhead crane traveling at the rated speed roundly 3 times to check the working conditions of the traveling mechanism of overhead crane, no track-slipping of the wheels while starting and braking, travel smoothly, limit switch acting correctly and buffering reliable.2. Static Load Test Running：The procedures and requirements are the following：1）Travel the hoist to the end limit position of the main girder. Mark the center point of the main girder while the overhead crane is stable.2）Travel the hoist to the center part of the main girder to lift the materials at the lowest speed until the rated lifting capacity gradually. Now make the material off 100mm from the ground and suspend 10 minutes. Then measure the down deflection of the center part of the main girder and ensure that it will not exceed 1/750 of the span if the overhead crane working class is A5. Do the same test 3 times and guarantee that there is no residual deformation after unloading at the third test. The interval of each test is not less than 10 minutes.3）After the overhead crane meet the above-mentioned tests, do the test with 1.25 times than the rated lifting capacity. To reduce the influence because of the deformation, travel the overhead crane around the column while doing the static test.3. Dynamic Load Test Running：The procedures and requirements are the following:1）Make the hoist with the rated lifting capacity loading up and loading down repeat and travel the hoist with the rated lifting capacity 3-5 times back and forth along its rail. Finally move the hoist to the center part of the main girder and make the crane travel 2-3 times back and forth at the rated speed along its rail, meanwhile do the repeat starting and braking function. In the whole process, all the brakes, limit switches and electrical control components should be reliable, correctly and flexible. No track-slipping for the wheels, normal vibration of the bridge structure, steady traveling and lifting mechanism, and no residual deformation after unloading.2）After the crane meet the above-mentioned tests, do the test with 1.1 times than the rated lifting capacity.Powered by: Zhengzhou Huahzhong Construction Machinery Co. Ltd. (Short for ZZHZ)Address: No.114 Industrial Road, Shangjie District, Zhengzhou City, Henan Province, ChinaTel: +86-371-68000000Mobile/Whatsapp: +86-13676949605
When must a crane or derrick inspection be preformed?
If you own a crane, you need to read the manual or consult governmental standards. Also, if you own and use a crane, you should probably stop until a knowledgeable person can tell you. Wrong category, btw.
What does crane-man think about begging?
Crane-man believes that begging is a necessary means of survival for those in dire circumstances, but he also sees it as a last resort. He holds a sense of pride and dignity, often emphasizing the importance of self-reliance and the value of hard work. Yet, he understands the harsh realities of life for those without resources, recognizing that sometimes people must resort to begging to make ends meet. Overall, his perspective reflects a balance between self-respect and the harsh truths of poverty.
How long can a Ada ramp be before there needs to be a resting platform?
According to the Americans with Disabilities Act (ADA) guidelines, a ramp that rises 1 inch in height must not exceed 12 inches in length, resulting in a maximum slope of 1:12. If the ramp runs longer than 30 feet, a resting platform or landing must be provided. Additionally, for every vertical rise of 30 inches, a resting platform is required. These platforms should be at least 60 inches long and as wide as the ramp.
How many steps do you have to do by the game Pokemon Emerald for a skitty egg to lay?
you must steps trought the must of hoenn you must steps trought the must of hoenn you must steps trought the must of hoenn
Can vertical angles be complementary?
Vertical angles must be congruent so if they are complementary, they must be 45 degrees to be complementary.
Can seahorses be house pets?
Yes, some people keep sea horses as pets. They are not easy animals to keep because they require good water quality, constant water flow and a special diet. If you want to keep seahorses as pets you should start by researching the care of other saltwater animals. The more you know about the species of animal you want to keep the better.
How do you conduct safety inspection of an overhead traveling crane?
First thing to do is a visual check, looking for obvious damage, - anything loose,broken Check the crane status lights, green,red,yellow, green is operational check bridge lights, all working? check floor for any obvious leaks check ladder for damage prior to climbing into cab, when egressing use 3 point contact, use rungs and not siderails, place ladder at the correct angle, ensure no knots in the rope enter cab and sound horn or other warning device, this will warn others the crane is about to be powered up, wait 30-45 seconds before powering up crane. while you are waiting, check a/c fire extinguisher, radio and any other accessories adjust seat and mirrors for comfort and visibility power up crane check hoist, check up first, if the hoist goes down, stop immediately and get crane checked by maintence. In a safe area, away from traffic ,lower hoist and observe cable, check for obviouse damage, kinking,birds nesting,broken strands, lowering should be smooth. raise hoist to upper limit, ensure limit works, lower hoist 4 inches, get a visual reference point then this becomes stopping position, do not rely on the limit switch to stop the hoist on day to day activities. check trolley left and right, should be smooth, if equiped with a drag brake, no more than 18 inches travel before trolley stops. In a safe area, check bridge travel foreward then reverse, smooth no dogtracking or crabbing. check brakes, should stop crane smoothly. check any other attachments. check air and hydraulics if equipped fill out crane log, a record that the up limit switch is working and in good repair must be written in the logbook
When extending the boom on the engine hoist what must be done to maintain stability?
Extend the legs also.
What means the variable that must be kept constant?
What variables must be kept constant
Vertical angles must be adjacent?
No.
Verticle angles must be what?
Vertical, possibly!
Do you walk horizontal or vertical?
you must walk vertical because that's what your like when you stand up!
Which lines run Vertical?
On the basis of the information and context provided in the question, the answer must be "vertical lines".
What is the difference between vertical angles and congruent angles?
not all congruent angles are vertical angles. Vertical angles must share a vertex.
What must sound when a Gantry crane is moving?
pip - pip by Noxy
How do you use vertical climate in a sentence?
a baby chick vertical climate must stay in their mother's stomach.
