CN101566532A - Test weight method of lifting ladle for large steel-making casting bridged crane - Google Patents
Test weight method of lifting ladle for large steel-making casting bridged crane Download PDFInfo
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- CN101566532A CN101566532A CNA2009100855795A CN200910085579A CN101566532A CN 101566532 A CN101566532 A CN 101566532A CN A2009100855795 A CNA2009100855795 A CN A2009100855795A CN 200910085579 A CN200910085579 A CN 200910085579A CN 101566532 A CN101566532 A CN 101566532A
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Abstract
The invention provides a test weight method of lifting ladle for a large steel-making casting bridged crane, belonging to the technical field of converter steelmaking, in particular to a large casting bridged crane. Without adopting normal nacelle test weight method, the method adopts a test weight method of taking a plurality of ladle iron blocks as counterweights and comprises the following steps of: determining the quantity of the ladles and the weight of the iron blocks needed by each ladle; preparing for counterweight; checking before running-in of the crane; running-in at empty load; and testing on static load; and running-in at dynamic load. The method has the advantages of leading the test weight procedure to be simple and greatly reducing the measure costs of the test weights.
Description
Technical field
The invention belongs to the converter steeling technology field, particularly provide a kind of steel-making massive casting overhead travelling crane string to put forward ladle test mass method.This method is used to be applicable to that steelshop is used for the test mass of the massive casting overhead travelling crane of handling ladle.
Background technology
In recent years, in national steelmaking converter system, carried out a lot newly-built and transform, the converter of being installed is increasing, come out 100t converter, 120t converter, 210t converter, 300t converter etc., the casting overhead travelling crane of the handling ladle that matches with it is increasing, as overhead travelling crane such as 180/50t, 225/65t, 350/75t, 480/105t.The test mass of this class overhead travelling crane often adopts hanging basket test mass method, needs to make large-scale hanging basket, also will process 2 thick bearing pins and be used for lifting, takes material, the cost height.
Summary of the invention
Technical matters to be solved by this invention is the test mass of steel-making massive casting overhead traveling crane, adopts conventional hanging basket test mass method difficulty big, the cost height.
The present invention only needs existing equipment, as weighbridge, electromagnetic lifter, straddle carrier, ladle, also needs iron block, wire rope and buckle, does not need to make auxiliary suspender, and the test mass operation is simple relatively, and the measure cost is low.
The present invention does not adopt hanging basket test mass method commonly used (promptly make large-scale hanging basket, make the test mass method of counterweight with its dress steel billet), but adopts a plurality of ladle dress iron blocks to make the test mass method of counterweight.
The present invention includes counterweight prepares and the crane test working.Counterweight prepares to comprise the deadweight of weighing ladle, calculate the capacity of ladle, need to determine with ladle quantity, determine that each ladle need adorn the weight of iron block, pack in the ladle being transported into on-the-spot iron block by calculating good requirement.Test working comprises: the test working of idling lotus, quiescent load test, dynamic load test working.It is characterized in that this test mass is carried out according to following step:
1, determines the quantity of ladle and the weight that each ladle need be adorned iron block
Weigh up the weight of ladle with weighbridge, need to determine quantity with ladle by the requirement of 1 times, 1.1 times, 1.25 times rated load of overhead traveling crane test mass.Calculate definite each ladle and need adorn the weight of iron block.
2, the preparation of counterweight
The requirement of calculating by first step is ready to iron block, with electromagnetic lifter iron block is packed in the ladle.
3, the inspection before the crane test working
Should carry out detailed, conscientious interrogating and examining to each position of crane before the crane test working.
4, idling lotus test working
Start cart, main carriage and secondary dolly, respectively the suspension hook of main carriage and secondary dolly is dropped to extreme lower position.Reciprocal 3 times of above-mentioned running.
5, quiescent load test
The quiescent load test comprises 1 times of rated static load test and 1.25 times of rated static load tests.In quiescent load when test, be parked in span centre with main carriage, and the load of the rated load weight of corresponding multiple is mentioned, and measures corresponding quiet rigidity and camber.
6, dynamic load test working
During the dynamic load test working of crane, at first main carriage is parked in span centre, the load of 1.1 times of rated load weights is done the test working that hoists, the omnidistance operation of crane once then.
Must there be weighbridge step 2 working-yard, is used for weighing of iron block, and test mass overhead traveling crane same must have electromagnetic lifter in striding, and electromagnetic lifter is arranged in perhaps other is striden and can be transported in this strides by straddle carrier.
Step 5,6 test workings, a ladle is mentioned with the plate hook of overhead traveling crane, another ladle is mentioned with wire rope, wire rope clump plate hook with hang the fork connecting place the space in pass, remove the gudgeon of pocket ladle along plate hook; The ladle of mentioning with plate hook is last, and the ladle of mentioning with wire rope is down.
The invention has the advantages that, do not make hanging basket, utilize existing equipment fully, easy and simple to handle, reduced the cost of test mass to a great extent.
Description of drawings
Fig. 1 carries ladle test mass method synoptic diagram for string.
Fig. 2 carries ladle test mass method partial schematic diagram for string.Wherein, No. 1 ladle 1,2, No. 2 ladles 3 of steel wire.
Embodiment
Steel-making massive casting overhead travelling crane string is put forward ladle test mass method and is carried out according to following step:
Step 1: determine the quantity of ladle and the weight that each ladle need be adorned iron block
Weigh up the weight of ladle with weighbridge, the physical size of measuring on-the-spot ladle is calculated the capacity of ladle, need to determine the quantity of usefulness ladle by the requirement of 1 times, 1.1 times, 1.25 times rated load of overhead traveling crane test mass.Calculate definite each ladle and need adorn the weight of iron block (needing the space between the consideration iron block).
Step 2: the preparation of counterweight
The requirement of calculating by first step is ready to iron block, with electromagnetic lifter iron block is packed in the ladle, and remembered the tonnage number on ladle, contains ladle and conducts oneself with dignity.
Step 3: the inspection before the crane test working
Should carry out detailed, conscientious interrogating and examining before the crane test working.The content of particular exam and require as follows: installation such as electrical system, safety interlock, detent, controller, illumination and signal system should meet the requirements, and its action should be sensitive and accurate; Fixing and the winding on load-engaging device, pulley blocks and reel of steel wire end should be correctly, reliably; Performance, specification and the quantity of the added oil of each oil site and speed reduction unit, fat should meet the regulation of equipment and technology file; The braked wheel of moving each motion of dish all should make in the rotation system last root axle retardance phenomenon that do not have that rotates a circle.
Step 4: idling lotus test working
Start cart, main carriage and secondary dolly, respectively the suspension hook of main carriage and secondary dolly is dropped to extreme lower position.Reciprocal 3 times of above-mentioned running.Need to check by following content and requirement in the process of running: the motor operation of each mechanism should be normal, should not block rail when cart and trolley travelling; Each detent can move accurately and timely, and each limit switch and safety feature action should be accurately, reliably; When suspension hook was transferred to extreme lower position, the number of turns of wire rope should not be less than 2 circles (except the retainer plate) on the reel; When using cable conduction, the speed of cable laying and take-up should be coordinated mutually with corresponding mechanism speed, and should be able to satisfy the requirement of working limit position.
Step 5: quiescent load test
The quiescent load test comprises 1 times of rated static load test and 1.25 times of rated static load tests.At first start lifting mechanism, carry out idling lotus descending operation, and make dolly come and go operation on total travel, this noload test run should not be less than three times, should no abnormal phenomenon.Then dolly is parked in the span centre place of overhead travelling crane, after 1 times of rated load of the rated load weight that hoists, makes dolly come and go operation several each several part on the crane span structure total travel and answer no abnormal phenomenon, unloading rear axle stand structure should no abnormal phenomenon.At last dolly is parked in the span centre of overhead travelling crane, do not have to impact 1.25 times load of the rated load weight that hoists, it overhead highly is being 100～200mm place, the suspention residence time should be less than 10min, and should there be unstable phenomenon, unloading reaches dolly and strides the end place then, checks the loading bridge metal construction, and answers the damage or the defective such as loosening of flawless, weld cracking, peeling paint and other influence safety.1.25 also need measure the in fact camber of girder in the load test process doubly.
The method of mentioning counterweight is as follows: at first with wire rope clump plate hook with hang the fork connecting place the space in pass, with plate hook No. 1 ladle is mentioned (this ladle iron block must be filled) then, be raised to certain height, remove the gudgeon of No. 2 ladles of pocket at last with wire rope, as shown in Figure 1.
Step 6: dynamic load test working
During the dynamic load test working of crane, at first main carriage is parked in span centre, the load of 1.1 times of rated load weights is done the test working that hoists, the omnidistance operation of crane once then.Check by following content and requirement simultaneously: the dynamic load test working of each mechanism should be carried out respectively, when the teamwork test working requires, should be undertaken by the regulation of equipment and technology file; The dynamic load test working of each mechanism should be carried out on total travel, accumulative total starting and working time, and should be not little to electronic crane to 1h; The action of each mechanism should be sensitive, steady, reliable, and the action of safeguard protection, interlocking device and limit switch should be accurately, reliably.
Claims (3)
1, a kind of steel-making massive casting overhead travelling crane string is put forward ladle test mass method, and it comprises counterweight preparation and crane test working; Counterweight prepares to comprise the deadweight of weighing ladle, calculate the capacity of ladle, need to determine with ladle quantity, determine that each ladle need adorn the weight of iron block, pack in the ladle being transported into on-the-spot iron block by calculating good requirement; Test working comprises: the test working of idling lotus, quiescent load test, dynamic load test working; It is characterized in that test mass is carried out according to following step:
(1) determines the quantity of ladle and the weight that each ladle need be adorned iron block
Weigh up the weight of ladle with weighbridge, need to determine quantity, calculate and determine that each ladle need adorn the weight of iron block with ladle by the requirement of 1 times, 1.1 times, 1.25 times rated load of overhead traveling crane test mass;
(2) preparation of counterweight
(1) requirement of calculating is ready to iron block set by step, with electromagnetic lifter iron block is packed in the ladle;
(3) inspection before the crane test working
Should carry out detailed, conscientious interrogating and examining to each position of crane before the crane test working;
(4) idling lotus test working
Start cart, main carriage and secondary dolly, respectively the suspension hook of main carriage and secondary dolly is dropped to extreme lower position, reciprocal 3 times of above-mentioned running;
(5) quiescent load test
The quiescent load test comprises 1 times of rated static load test and 1.25 times of rated static load tests; In quiescent load when test, be parked in span centre with main carriage, and the load of the rated load weight of corresponding multiple is mentioned, and measures corresponding quiet rigidity and camber;
(6) dynamic load test working
During the dynamic load test working of crane, at first main carriage is parked in span centre, the load of 1.1 times of rated load weights is done the test working that hoists, the omnidistance operation of crane once then.
2, method according to claim 1 is characterized in that, must there be weighbridge step (2) working-yard, is used for weighing of iron block, and test mass overhead traveling crane same must have electromagnetic lifter in striding, and electromagnetic lifter is arranged in perhaps other is striden and can be transported in this strides by straddle carrier.
3, method according to claim 1 is characterized in that, step (5), step (6) test working, a ladle is mentioned with the plate hook of overhead traveling crane, another ladle is mentioned with wire rope, wire rope clump plate hook with hang the fork connecting place the space in pass, remove the gudgeon of pocket ladle along plate hook; The ladle of mentioning with plate hook is last, and the ladle of mentioning with wire rope is down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100855795A CN101566532A (en) | 2009-05-26 | 2009-05-26 | Test weight method of lifting ladle for large steel-making casting bridged crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100855795A CN101566532A (en) | 2009-05-26 | 2009-05-26 | Test weight method of lifting ladle for large steel-making casting bridged crane |
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| Publication Number | Publication Date |
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| CN101566532A true CN101566532A (en) | 2009-10-28 |
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| CNA2009100855795A Pending CN101566532A (en) | 2009-05-26 | 2009-05-26 | Test weight method of lifting ladle for large steel-making casting bridged crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886985A (en) * | 2010-06-29 | 2010-11-17 | 太平湾发电厂 | Dynamic load test method of load lifting capacity of bridge crane |
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2009
- 2009-05-26 CN CNA2009100855795A patent/CN101566532A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886985A (en) * | 2010-06-29 | 2010-11-17 | 太平湾发电厂 | Dynamic load test method of load lifting capacity of bridge crane |
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Open date: 20091028 |