CN110885016A - Ground pre-tightening method for 250T crane steel wire rope - Google Patents
Ground pre-tightening method for 250T crane steel wire rope Download PDFInfo
- Publication number
- CN110885016A CN110885016A CN201911171216.3A CN201911171216A CN110885016A CN 110885016 A CN110885016 A CN 110885016A CN 201911171216 A CN201911171216 A CN 201911171216A CN 110885016 A CN110885016 A CN 110885016A
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- Prior art keywords
- steel wire
- wire rope
- tightening
- tensioning device
- winch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
- B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/52—Floating cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
Abstract
The invention relates to a ground pre-tightening method for a 250T crane steel wire rope, which is characterized by comprising the following steps of: the specific pre-tightening steps are as follows: including S1: pre-tightening a main hook steel wire rope; s2: pre-tightening the auxiliary hook steel wire rope; s3: pre-tightening the amplitude-variable steel wire rope; s4: dragging and pre-tightening a steel wire rope; in the factory debugging stage of the 250t crane, the steel wire rope is directly tensioned from a direction-changing pulley at the head of the propeller strut to each winding drum by adopting a pre-tightening device, all the winding drums of the steel wire rope are fixed in place, and after the crane is finally assembled in place at the later stage, the steel wire rope is directly pulled out by adopting a guide rope and is installed in place according to each winding; the method is simple and convenient, the use cost of the equipment is low, the operation is easy, and compared with the general assembly field construction, the method reduces the risk and time of high-altitude operation, reduces the use cost of large-scale equipment and reduces the construction safety risk.
Description
Technical Field
The invention relates to the field, in particular to a ground pre-tightening method for a steel wire rope of a 250T crane.
Background
The 250t crane is arranged on a 60m high ship body cylinder, the position is high, the arrangement and the operation of the steel wire rope pre-tightening device are difficult, large-scale hoisting equipment is needed, and the construction safety risk is high; therefore, a method with low construction risk and low steel wire rope pre-tightening operation difficulty is needed for ground pre-tightening of the steel wire rope of the crane.
Disclosure of Invention
The invention aims to provide a ground pre-tightening method for a steel wire rope of a 250T crane, which can solve the problems of large construction risk and difficult operation of a general crane due to the fact that the general crane adopts large-scale hoisting equipment for pre-tightening.
In order to solve the technical problems, the technical scheme of the invention is as follows: a ground pre-tightening method for a 250T crane steel wire rope is characterized by comprising the following steps: the specific pre-tightening steps are as follows: including S1: pre-tightening a main hook steel wire rope; s2: pre-tightening the auxiliary hook steel wire rope; s3: pre-tightening the amplitude-variable steel wire rope; s4: dragging and pre-tightening a steel wire rope;
s1: pre-tightening a main hook steel wire rope:
s1.1: all mechanisms are debugged, and before the steel wire rope is wound, all related tests of all the mechanisms on the winch are finished, and the mechanisms can be matched with the winding and tensioning action of the steel wire rope;
s1.2: arranging a steel plate and a tensioning device at one side of the crane, wherein the opening center of a reel of the tensioning device is right below the center line of the arm support, so that the subsequent steel wire rope can be tensioned conveniently; 8 pieces of code t is uniformly distributed at 16mn, the tensioning device is welded and fixed on a steel plate paved below, and 10t of balance weight is arranged for fixation to prevent sliding;
s1.3: connecting a tension device reel on the main hook steel wire rope from a main hook on the top of the propeller strut to a pulley through a guide rope to a main hook winch; the main hook winch is matched with the tensioning device, the main hook steel wire rope is dragged to the main hook winch at a low speed, and the main hook steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s1.4: setting the pretightening force of a tensioning device, matching a main hook winch with the tensioning device, tensioning a main hook steel wire rope to an eighth full layer from a winding drum, canceling the pretightening force setting, additionally installing a direction-changing pulley on the steel wire rope in the propeller strut, preventing the steel wire rope from contacting and rubbing with a rear partition wall of the propeller strut, continuously winding the steel wire rope to enable the end part to reach a cab platform, tightening and binding the end part, and pouring after the cable joint is completely assembled and installed;
s2: pre-tightening the auxiliary hook steel wire rope:
s2.1: connecting the auxiliary hook steel wire rope on a tensioning device reel to an auxiliary hook winch through a guide rope from the auxiliary hook direction-changing pulley at the top of the propeller strut;
s2.2: the auxiliary hook winch is matched with the tensioning device, the auxiliary hook steel wire rope is slowly pulled to the auxiliary hook winch, and the auxiliary hook steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s2.3, setting the pretightening force of the tensioning device, matching the auxiliary hook winch with the tensioning device, and tensioning the auxiliary hook steel wire rope on the winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; pouring the cable joint after the final assembly is installed in place;
s3: pre-tightening a variable amplitude steel wire rope:
s3.1: connecting the amplitude-variable steel wire rope to a tensioning device reel from an amplitude-variable direction-changing pulley on the right side of the top of the propeller strut to an amplitude-variable winch through a guide rope;
s3.2: the amplitude-variable winch is matched with the tensioning device, the amplitude-variable steel wire rope is slowly dragged to the amplitude-variable winch, and the amplitude-variable steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s3.3, setting the pretightening force of the tensioning device, matching the amplitude-variable winch with the tensioning device, and tensioning the amplitude-variable steel wire rope on the winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; pouring the cable joint after the final assembly is installed in place;
s4: dragging and pre-tightening a steel wire rope:
s4.1: a tensioning device reel is arranged on the dragging steel wire rope, an opening redirection pulley is hung in front of the dragging winch, and the dragging winch is connected to the dragging winch through a rope passing pulley;
s4.2: the dragging winch is matched with the tensioning device, the dragging steel wire rope is dragged to the dragging winch at a low speed, and the dragging steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s4.3, pre-tightening force of the tensioning device is set, the dragging winch is matched with the tensioning device, and the dragging steel wire rope is tensioned to the upper winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; and after the end cable joints are assembled, the steel wire rope passes through a pulley 20T below the arm support and then is poured.
Further, in S1, the pretightening force of the tensioner is set to 6 t; setting the pretightening force of the tensioning device to be 9t in the step S2; setting the pretightening force of the tensioning device to be 9t in the step S3; in S4, the tensioner preload is set to 2 t.
The invention has the advantages that:
1) in the factory debugging stage of the 250t crane, the steel wire rope is directly tensioned from a direction-changing pulley at the head of the propeller strut to each winding drum by adopting a pre-tightening device, all the winding drums of the steel wire rope are fixed in place, and after the crane is finally assembled in place at the later stage, the steel wire rope is directly pulled out by adopting a guide rope and is installed in place according to each winding; the method is simple and convenient, the use cost of the equipment is low, the operation is easy, and compared with the general assembly field construction, the method reduces the risk and time of high-altitude operation, reduces the use cost of large-scale equipment and reduces the construction safety risk.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of a main hook steel wire rope pre-tightening method for a 250 t-gram steel wire rope ground pre-tightening method.
FIG. 2 is a schematic structural diagram of a winch of the ground pre-tightening method for a 250 t-gram steel wire rope of the invention.
FIG. 3 is a schematic structural diagram of a pulley of a ground pre-tightening method for a 250 t-gram steel wire rope.
Detailed Description
The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
As shown in fig. 1 to 3, the ground pre-tightening method for the steel wire rope of the 250T crane includes the following steps: including S1: pre-tightening a main hook steel wire rope; s2: pre-tightening the auxiliary hook steel wire rope; s3: pre-tightening the amplitude-variable steel wire rope; s4: and dragging the steel wire rope for pre-tightening.
S1: pre-tightening a main hook steel wire rope:
s1.1: all mechanisms are debugged, and before the steel wire rope is wound, all related tests of all the mechanisms on the winch are finished, and the mechanisms can be matched with the winding and tensioning actions of the steel wire rope.
S1.2: arranging a steel plate and a tensioning device at one side of the crane, wherein the opening center of a reel of the tensioning device is right below the center line of the arm support, so that the subsequent steel wire rope can be tensioned conveniently; 8 pieces of the clamping code t are uniformly distributed at 16mn, the tensioning device is welded and fixed on a steel plate paved below, and a 10t counterweight is arranged for fixing to prevent sliding.
S1.3: connecting a tension device reel on the main hook steel wire rope from a main hook direction-changing pulley 5 on the top of the propeller strut 4 to a main hook winch 1 through a guide rope; the main hook winch 1 is matched with the tensioning device, the main hook steel wire rope is slowly pulled to the main hook winch 1, and the main hook steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; and (4) removing the guide rope.
S1.4: setting the pretightening force of a tensioning device, matching a main hook winch 1 with the tensioning device, tensioning a main hook steel wire rope to an eighth full layer from a winding drum, canceling the pretightening force setting, additionally installing a direction-changing pulley on the steel wire rope in the propeller strut, preventing the steel wire rope from contacting and rubbing with a rear partition wall of the propeller strut, continuously winding the steel wire rope to enable the end to reach a cab platform, well tightening and binding the end, and pouring after the cable joint is completely assembled and installed in place.
S2: pre-tightening the auxiliary hook steel wire rope:
s2.1: and (3) connecting the auxiliary hook steel wire rope upper tensioning device reel to the auxiliary hook winch 2 from the auxiliary hook direction-changing pulley 6 at the top of the propeller strut 4 through a guide rope.
S2.2: the auxiliary hook winch 2 is matched with the tensioning device, the auxiliary hook steel wire rope is slowly pulled to the auxiliary hook winch, and the auxiliary hook steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s2.3, setting the pretightening force of the tensioning device, matching the auxiliary hook winch 2 with the tensioning device, and tensioning the auxiliary hook steel wire rope on the winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; and pouring the cable joint after the final assembly is installed in place.
S3: pre-tightening a variable amplitude steel wire rope:
s3.1: and (3) connecting the variable-amplitude steel wire rope to a variable-amplitude winch through a guide rope from a variable-amplitude direction-changing pulley 7 on the right side of the top of the propeller strut 4 by using a tensioning device reel.
S3.2: the amplitude-variable winch 3 is matched with the tensioning device, the amplitude-variable steel wire rope is slowly dragged to the amplitude-variable winch 3, and the amplitude-variable steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; and (4) removing the guide rope.
S3.3, setting the pretightening force of the tensioning device, matching the amplitude-variable winch 3 with the tensioning device, and tensioning the amplitude-variable steel wire rope on the winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; and pouring the cable joint after the final assembly is installed in place.
S4: dragging and pre-tightening a steel wire rope:
s4.1: and (3) hanging an opening direction-changing pulley on the dragging steel wire rope on a tensioning device reel, before dragging the winch, and connecting the opening direction-changing pulley to the dragging winch through a rope passing pulley.
S4.2: the dragging winch is matched with the tensioning device, the dragging steel wire rope is dragged to the dragging winch at a low speed, and the dragging steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; and (4) removing the guide rope.
S4.3, pre-tightening force of the tensioning device is set, the dragging winch is matched with the tensioning device, and the dragging steel wire rope is tensioned to the upper winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; and after the end cable joints are assembled, the steel wire rope passes through a pulley 20T below the arm support and then is poured.
Setting the pretightening force of the tensioning device to be 6t in S1; setting the pretightening force of the tensioning device to be 9t in the step S2; setting the pretightening force of the tensioning device to be 9t in the step S3; in S4, the tensioner preload is set to 2 t.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A ground pre-tightening method for a 250T crane steel wire rope is characterized by comprising the following steps: the specific pre-tightening steps are as follows: including S1: pre-tightening a main hook steel wire rope; s2: pre-tightening the auxiliary hook steel wire rope; s3: pre-tightening the amplitude-variable steel wire rope; s4: dragging and pre-tightening a steel wire rope;
s1: pre-tightening a main hook steel wire rope:
s1.1: all mechanisms are debugged, and before the steel wire rope is wound, all related tests of all the mechanisms on the winch are finished, and the mechanisms can be matched with the winding and tensioning action of the steel wire rope;
s1.2: arranging a steel plate and a tensioning device at one side of the crane, wherein the opening center of a reel of the tensioning device is right below the center line of the arm support, so that the subsequent steel wire rope can be tensioned conveniently; 8 pieces of code t is uniformly distributed at 16mn, the tensioning device is welded and fixed on a steel plate paved below, and 10t of balance weight is arranged for fixation to prevent sliding;
s1.3: connecting a tension device reel on the main hook steel wire rope from a main hook on the top of the propeller strut to a pulley through a guide rope to a main hook winch; the main hook winch is matched with the tensioning device, the main hook steel wire rope is dragged to the main hook winch at a low speed, and the main hook steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s1.4: setting the pretightening force of a tensioning device, matching a main hook winch with the tensioning device, tensioning a main hook steel wire rope to an eighth full layer from a winding drum, canceling the pretightening force setting, additionally installing a direction-changing pulley on the steel wire rope in the propeller strut, preventing the steel wire rope from contacting and rubbing with a rear partition wall of the propeller strut, continuously winding the steel wire rope to enable the end part to reach a cab platform, tightening and binding the end part, and pouring after the cable joint is completely assembled and installed;
s2: pre-tightening the auxiliary hook steel wire rope:
s2.1: connecting the auxiliary hook steel wire rope on a tensioning device reel to an auxiliary hook winch through a guide rope from the auxiliary hook direction-changing pulley at the top of the propeller strut;
s2.2: the auxiliary hook winch is matched with the tensioning device, the auxiliary hook steel wire rope is slowly pulled to the auxiliary hook winch, and the auxiliary hook steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s2.3, setting the pretightening force of the tensioning device, matching the auxiliary hook winch with the tensioning device, and tensioning the auxiliary hook steel wire rope on the winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; pouring the cable joint after the final assembly is installed in place;
s3: pre-tightening a variable amplitude steel wire rope:
s3.1: connecting the amplitude-variable steel wire rope to a tensioning device reel from an amplitude-variable direction-changing pulley on the right side of the top of the propeller strut to an amplitude-variable winch through a guide rope;
s3.2: the amplitude-variable winch is matched with the tensioning device, the amplitude-variable steel wire rope is slowly dragged to the amplitude-variable winch, and the amplitude-variable steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s3.3, setting the pretightening force of the tensioning device, matching the amplitude-variable winch with the tensioning device, and tensioning the amplitude-variable steel wire rope on the winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; pouring the cable joint after the final assembly is installed in place;
s4: dragging and pre-tightening a steel wire rope:
s4.1: a tensioning device reel is arranged on the dragging steel wire rope, an opening redirection pulley is hung in front of the dragging winch, and the dragging winch is connected to the dragging winch through a rope passing pulley;
s4.2: the dragging winch is matched with the tensioning device, the dragging steel wire rope is dragged to the dragging winch at a low speed, and the dragging steel wire rope is fixedly installed in place by a rope pressing plate according to the blueprint requirement; dismantling the guide rope;
s4.3: setting the pretightening force of a tensioning device, and tensioning a dragging winch and the tensioning device to tension a dragging steel wire rope on an upper winding drum; after the end part of the steel wire rope reaches the cab platform, tightening and binding the end part; and after the end cable joints are assembled, the steel wire rope passes through a pulley 20T below the arm support and then is poured.
2. The ground pre-tightening method for the steel wire rope of the 250T crane according to claim 1, characterized in that: setting the pretightening force of the tensioning device to be 6t in the step S1; setting the pretightening force of the tensioning device to be 9t in the step S2; setting the pretightening force of the tensioning device to be 9t in the step S3; in S4, the tensioner preload is set to 2 t.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911171216.3A CN110885016B (en) | 2019-11-26 | 2019-11-26 | Ground pre-tightening method for 250T crane steel wire rope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911171216.3A CN110885016B (en) | 2019-11-26 | 2019-11-26 | Ground pre-tightening method for 250T crane steel wire rope |
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| CN110885016A true CN110885016A (en) | 2020-03-17 |
| CN110885016B CN110885016B (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353817A (en) * | 2021-07-01 | 2021-09-07 | 南通振华重型装备制造有限公司 | 200T winch module installation method of 800T crane |
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| CN206799021U (en) * | 2017-05-04 | 2017-12-26 | 中交第二航务工程局有限公司 | A kind of full circle swinging traveling derrick crane |
| CN108639977A (en) * | 2018-03-30 | 2018-10-12 | 南通振华重型装备制造有限公司 | A kind of 2000t crane barges crane amplitude variation steel wire rope pre-tightens and method of adjustment |
| US20190218077A1 (en) * | 2018-01-17 | 2019-07-18 | Maritime Developments Limited | Rope maintenance system |
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2019
- 2019-11-26 CN CN201911171216.3A patent/CN110885016B/en active Active
Patent Citations (4)
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| CN205709607U (en) * | 2016-07-01 | 2016-11-23 | 湖北鄂南起重运输机械有限公司 | A kind of steel wire end fixing device of belt sensor |
| CN206799021U (en) * | 2017-05-04 | 2017-12-26 | 中交第二航务工程局有限公司 | A kind of full circle swinging traveling derrick crane |
| US20190218077A1 (en) * | 2018-01-17 | 2019-07-18 | Maritime Developments Limited | Rope maintenance system |
| CN108639977A (en) * | 2018-03-30 | 2018-10-12 | 南通振华重型装备制造有限公司 | A kind of 2000t crane barges crane amplitude variation steel wire rope pre-tightens and method of adjustment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113353817A (en) * | 2021-07-01 | 2021-09-07 | 南通振华重型装备制造有限公司 | 200T winch module installation method of 800T crane |
| CN113353817B (en) * | 2021-07-01 | 2023-10-24 | 南通振华重型装备制造有限公司 | Winch module installation method of 200T of 800T crane |
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