CN103057973B - Multipoint jacking method suitable for changing pivotal bearing of material taking machine - Google Patents

Multipoint jacking method suitable for changing pivotal bearing of material taking machine Download PDF

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Publication number
CN103057973B
CN103057973B CN201210213976.8A CN201210213976A CN103057973B CN 103057973 B CN103057973 B CN 103057973B CN 201210213976 A CN201210213976 A CN 201210213976A CN 103057973 B CN103057973 B CN 103057973B
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CN
China
Prior art keywords
reclaimer
jacking
jack
cantilever
turn
Prior art date
Application number
CN201210213976.8A
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Chinese (zh)
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CN103057973A (en
Inventor
贾方俊
Original Assignee
南京梅山冶金发展有限公司
上海梅山钢铁股份有限公司
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Application filed by 南京梅山冶金发展有限公司, 上海梅山钢铁股份有限公司 filed Critical 南京梅山冶金发展有限公司
Priority to CN201210213976.8A priority Critical patent/CN103057973B/en
Publication of CN103057973A publication Critical patent/CN103057973A/en
Application granted granted Critical
Publication of CN103057973B publication Critical patent/CN103057973B/en

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Abstract

The invention discloses a multipoint jacking method suitable for changing a pivotal bearing of a material taking machine. A center adjustment of the material taking machine is achieved by utilizing a support tower frame and a jack set which is operated synchronously and adjusting the size of a weight which is arranged on a cantilever, and difficulty and risk of jacking operation are reduced. Due to the fact that a plurality of supporting points are arranged on the material taking machine in a jacking operation, the multipoint jacking method suitable for changing the pivotal bearing of the material taking machine improves stability of a center of gravity of the material taking machine in a changing operation, fully and effectively reduces changing difficulty of the pivotal bearing of the material taking machine, reduces the risk of the changing operation and improves changing efficiency.

Description

A kind of method being applicable to the multiple spot jacking that reclaimer swing bearing is changed

Technical field

The present invention relates to the method for a kind of reclaimer axis of revolution replacement operation, particularly a kind of method being applicable to the multiple spot jacking that reclaimer swing bearing is changed.

Background technology

Reclaimer is the high-efficiency appliance that modern chemical industry sparetime university ancestor bulk material loads and unloads continuously, is widely used in the stacking and taking operation that the bulk cargos such as harbour, harbour, metallurgy, cement, steel plant, coke-oven plant, coal storage plant, power plant (ore, coal, coke, sandstone etc.) store stock ground at present.In production, the radius of turn of reclaimer and the setting height(from bottom) of upper structure part generally all reach tens of rice, if adopt jack-block to change the swing bearing of wearing and tearing, need the upper structure part of reclaimer entirety to be raised to suitable height, and the upper structure part of reclaimer is all at about 240 tons.As can be seen here, lifting operation is a high risk operation, in order to reduce operating risk, the greateset risk of lifting operation is controlled in the scope that can regulate and control, generally need the height of gravitational center reducing reclaimer upper structure part, and center of gravity will be avoided to exceed within the scope of the support of reclaimer.Also need the load reducing each resting point, to improve the safety factor of reclaimer jacking operation simultaneously.

Summary of the invention

For solving the problem, the invention discloses a kind of method being applicable to the multiple spot jacking that reclaimer swing bearing is changed, by adjusting the center-of-gravity position of reclaimer and arranging multi-point support, improve the balance of reclaimer in jacking operation, reduce the difficulty that axis of revolution changed by reclaimer.

The method being applicable to the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention, comprise the steps: that (1) installs two support tower respectively immediately below the cantilever two ends of reclaimer, the support tower of cantilever front end is front end pylon, and the support tower of cantilevered trailing end is middle pylon; (2) below each support tower, jack is laid; Below the turn table of reclaimer, around swing bearing, lay jack; (3) dismantle the counterweight of the reclaimer on cantilever, make the center of gravity of reclaimer upper structure part to cantilever front end, be i.e. the direction skew of bucket wheel, ensure the centre that the turn table place two of front end pylon and door frame that center of gravity is in cantilever supports greatly; (4), during jacking operation, in the middle of synchronous operation, pylon and each jack in turn table place carry out jacking, and the jack below the pylon of front end is followed and carried out jacking operation; (5) jacking has operated, and change swing bearing, when doing decline operation, first the jack below the pylon of front end does step-down operation, and then in the middle of synchronous operation, pylon and each jack in turn table place decline.The method being applicable to the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention, by arranging support tower and arrange jack below support tower and turn table in jacking operation, achieve reclaimer multipoint operation when lifting operation, reduce the load of each strong point, improve the stability that in lifting operation, reclaimer upper structure part supports, reduce the risk of lifting operation, adopt the mode of multiple spot jacking to also help avoids upper structure part to be out of shape because load is excessive simultaneously, reduce the impact of environmental factor on lifting operation, improve the safe reliability of lifting operation.

The one being applicable to the method for the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention is improved, and step lays at least 3 jacks in (2) below each support tower; Below the turn table of reclaimer, around swing bearing, lay at least 3 jacks.This improvement by all arranging at least 3 jacks below support tower and turn table, and supporting construction is stablized, easy for installation, with low cost, easy to operate, practical.

Another being applicable to the method for the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention is improved, the counterweight of all or part of reclaimer in step (3) on dismounting cantilever.This improvement, by the counterweight on adjustment cantilever, achieves and controls the adjustment of reclaimer center of gravity, ensures reclaimer steadily of centre of gravity in lifting operation, reduces the difficulty that reclaimer axis of revolution changes operation, reduces the risk of installation, improve the safety of production operation.

The method being applicable to the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention, by changing in operation at reclaimer axis of revolution, adopt the operational method of multiple spot jacking, multiple resting point is jointly formed by the support tower and turn table that are arranged on cantilever two ends, with the load disperseing each point to bear, improve the balanced capacity in reclaimer jacking operation.Simultaneously by counterweight on adjustment cantilever, realize the adjustment to reclaimer center of gravity and control, improve the balance of reclaimer in jacking operation, reduce the difficulty that axis of revolution changed by reclaimer.

Accompanying drawing explanation

The apparatus structure schematic diagram of Fig. 1, reclaimer multiple spot lifting operation of the present invention;

Fig. 2, reclaimer of the present invention stressed schematic diagram in lifting operation;

Fig. 3, the reclaimer of the present invention schematic diagram that under support tower, jack is arranged in lifting operation;

The structural representation of lifting device under the turn table of Fig. 4, reclaimer of the present invention.

Reference numerals list:

1, bucket wheel; 2, cantilever; 3, counterweight;

4, turn table; 5, swing bearing; 6, door frame;

7, support tower; 8, jack

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, following detailed description of the invention should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.

As shown in Figures 1 to 4, the method being applicable to the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention, comprise the steps: that (1) installs two support tower 7 respectively immediately below cantilever 2 two ends of reclaimer, the support tower 7 of cantilever 2 front end is front end pylon, and the support tower 7 of cantilever 2 tail end is middle pylon; (2) below each support tower 7, jack 8 is laid; Below the turn table 4 of reclaimer, around swing bearing 5, lay jack 8; (3) dismantle the counterweight 3 of the reclaimer on cantilever 2, make the center of gravity of reclaimer upper structure part to cantilever 2 front end, be i.e. the direction skew of bucket wheel 1, ensure the centre that turn table 4 place two of front end pylon and door frame 6 that center of gravity is in cantilever 2 supports greatly; (4), during jacking operation, in the middle of synchronous operation, pylon and each jack 8 in turn table 4 place carry out jacking, and the jack 8 below the pylon of front end is followed and carried out jacking operation; (5) jacking has operated, and change swing bearing 5, when doing decline operation, first the jack 8 below the pylon of front end does step-down operation, and then in the middle of synchronous operation, pylon and each jack 8 in turn table 4 place decline.The method being applicable to the multiple spot jacking that reclaimer axis of revolution is changed disclosed by the invention, by arranging support tower and arrange jack below support tower and turn table in jacking operation, achieve reclaimer multipoint operation when lifting operation, reduce the load of each strong point, improve the stability that in lifting operation, reclaimer upper structure part supports, reduce the risk of lifting operation, adopt the mode of multiple spot jacking to also help avoids upper structure part to be out of shape because load is excessive simultaneously, reduce the impact of environmental factor on lifting operation, improve the safe reliability of lifting operation.

Preferred as one, below each support tower 7, lay at least 3 jacks 8 in step (2); Below the turn table 4 of reclaimer, around swing bearing 5, lay at least 3 jacks 8.By all arranging at least 3 jacks below support tower and turn table, supporting construction is stablized, easy for installation, with low cost, easy to operate, practical.Jack in jack group is with rock-steady structure scattering device on each strong point, and such as, the jack group be made up of three jacks 8 is arranged on the bottom of support tower in the mode of equicrural triangle; Four are then arranged with the form of quadrangle; Five can be then that pentagon or center of area form are arranged; Six then can with parallelly-arranged double-row structure etc.

Preferred as one, the counterweight 3 of all or part of reclaimer in step (3) on dismounting cantilever 2.By the counterweight on adjustment cantilever, achieve and the adjustment of reclaimer center of gravity is controlled, ensure reclaimer steadily of centre of gravity in lifting operation, reduce the difficulty that reclaimer axis of revolution changes operation, reduce the risk of installation, improve the safety of production operation.

In lifting operation, all or part of counterweight 3 of dismounting reclaimer, makes the center of gravity of reclaimer upper structure part to cantilever 2 front end, and namely the direction skew of bucket wheel 1, ensures between the turn table 4 that center of gravity is on the support tower 7 of cantilever 2 front end and door frame 6.

During jacking operation, the support tower 7 in the middle of synchronous operation and each jack 8 at turn table 4 place carry out jacking, and the jack 8 below the support tower 7 of front end is followed and carried out jacking operation.

Jacking has operated, and during decline operation, first the some jacks 8 below the support tower 7 of front end do step-down operation, and each jack 8 of support tower 7 and turn table 4 place then in the middle of synchronous operation declines.

Jack 8 in each lifting device is installed and after pre-jacking, disengaging section or whole counterweights 3, ensure that the center of gravity of reclaimer upper structure part is between the support tower 7 and turn table 4 of front end.Also be provided with fixing supporting leg bottom support tower 7, the height of supporting leg a little more than the height needing the jack 8 laid so that the installing/dismounting of jack 8.The basis rest of support tower 7 has backing plate, to improve stability and the reliability of support.Below turn table 4, some jacks 8 turn around swing bearing 5 and arrange, jack 8 is placed between turn table 4 and door frame 6, because the center of gravity of upper structure part moves forward in lifting operation, diminish with the load that door frame 6 bears, each jack 8 load of bearing herein is also corresponding greatly to be reduced, thus the difficulty changing swing bearing 5 operation after jacking also correspondingly reduces.

The method being applicable to the multiple spot jacking that reclaimer swing bearing is changed disclosed by the invention, by changing in operation at reclaimer axis of revolution, adopt the operational method of multiple spot jacking, multiple resting point is jointly formed by the support tower and turn table that are arranged on cantilever two ends, with the load disperseing each point to bear, improve the balanced capacity in reclaimer jacking operation.Simultaneously by counterweight on adjustment cantilever, realize the adjustment to reclaimer center of gravity and control, improve the balance of reclaimer in jacking operation, reduce the difficulty that axis of revolution changed by reclaimer.

Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, also comprises the technical scheme be made up of above technical characteristic combination in any.

Claims (4)

1. one kind is applicable to the method for the multiple spot jacking that reclaimer swing bearing is changed, it is characterized in that: the described method being applicable to the multiple spot jacking that reclaimer swing bearing is changed comprises the steps: that (1) installs two support tower respectively immediately below the cantilever two ends of reclaimer, the support tower of cantilever front end is front end pylon, and the support tower of cantilevered trailing end is middle pylon; (2) below each support tower, jack is laid; Below the turn table of reclaimer, around swing bearing, lay jack; (3) dismantle the counterweight of the reclaimer on cantilever, make the center of gravity of reclaimer upper structure part to cantilever front end, be i.e. the direction skew of bucket wheel, ensure the centre that the turn table place two of front end pylon and door frame that center of gravity is in cantilever supports greatly; (4), during jacking operation, in the middle of synchronous operation, pylon and each jack in turn table place carry out jacking, and the jack below the pylon of front end is followed and carried out jacking operation; (5) jacking has operated, and change swing bearing, when doing industry do decline, first the jack below the pylon of front end does step-down operation, and then in the middle of synchronous operation, pylon and each jack in turn table place decline.
2. the method being applicable to the multiple spot jacking that reclaimer swing bearing is changed according to claim 1, is characterized in that: step lays at least 3 jacks in (2) below each support tower; Below the turn table of reclaimer, around swing bearing, lay at least 3 jacks.
3 .the method being applicable to the multiple spot jacking that reclaimer swing bearing is changed according to claim 1, is characterized in that: the counterweight of the whole reclaimers in step (3) on dismounting cantilever.
4 .the method being applicable to the multiple spot jacking that reclaimer swing bearing is changed according to claim 1, is characterized in that: the counterweight of the part reclaimer in step (3) on dismounting cantilever.
CN201210213976.8A 2012-06-27 2012-06-27 Multipoint jacking method suitable for changing pivotal bearing of material taking machine CN103057973B (en)

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Application Number Priority Date Filing Date Title
CN201210213976.8A CN103057973B (en) 2012-06-27 2012-06-27 Multipoint jacking method suitable for changing pivotal bearing of material taking machine

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Application Number Priority Date Filing Date Title
CN201210213976.8A CN103057973B (en) 2012-06-27 2012-06-27 Multipoint jacking method suitable for changing pivotal bearing of material taking machine

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CN103057973B true CN103057973B (en) 2014-12-24

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103449194B (en) * 2013-08-31 2016-08-10 南京梅山冶金发展有限公司 A kind of method utilizing the pitching oil cylinder release floating jacking to expecting the replacing of machine floating bearing
CN103831577B (en) * 2014-02-28 2016-06-01 中国神华能源股份有限公司 The replacing options of shiploader pitching hinge bearing
CN103817507B (en) * 2014-03-07 2017-02-01 中国神华能源股份有限公司 Replacement method for pitching hinged point bearing of reclaimer
CN104259738B (en) * 2014-07-30 2017-01-11 东北大学 Replacement method of revolving bearing of material taking machine
CN106542344B (en) * 2015-09-16 2018-12-25 中冶宝钢技术服务有限公司 The replacing options of stacker-reclaimer pivoting support
CN105417196A (en) * 2015-12-10 2016-03-23 大连华锐重工集团股份有限公司 Hinged column type double-pull-rod cantilever stacker
CN105621114B (en) * 2016-03-24 2017-10-24 华电重工股份有限公司 Stacker-reclaimer and its revolving dial
CN108608197B (en) * 2018-07-23 2019-11-12 大连天重散装机械设备有限公司 A kind of bucket wheel machine main body steel construction oscillating bearing replacing options

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