CN112125137A - Hoisting method and hoisting auxiliary tool for steering engine hydraulic plunger of LNG transport ship - Google Patents
Hoisting method and hoisting auxiliary tool for steering engine hydraulic plunger of LNG transport ship Download PDFInfo
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- CN112125137A CN112125137A CN202010812481.1A CN202010812481A CN112125137A CN 112125137 A CN112125137 A CN 112125137A CN 202010812481 A CN202010812481 A CN 202010812481A CN 112125137 A CN112125137 A CN 112125137A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000011651 chromium Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 229910000805 Pig iron Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 5
- 239000003949 liquefied natural gas Substances 0.000 description 28
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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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
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to a hoisting method of a hydraulic plunger of a steering engine of an LNG transport ship, which comprises the steps of fixing a hoisting ring at one end of the hydraulic plunger of the steering engine, fixing a hoisting auxiliary tool at the other end of the hydraulic plunger of the steering engine, hoisting the hydraulic plunger of the steering engine to a vertical state by using a crane, moving the hydraulic plunger to the upper part of a steering engine room, hoisting the hydraulic plunger of the steering engine into the steering engine room through a hoisting hole, and contacting and supporting the hydraulic plunger of the steering engine with the ground by using the hoisting auxiliary tool to realize the controllable and slow placement of; still involve hoist and mount auxiliary fixtures, the structure is including support (1), plunger gasket (9), axle (4) and bearing wheel (2), two bearing wheel (2) fix the both sides at support (1) through the both ends of axle (4) respectively. The method and the tool can protect the chromium coating at the landing end of the plunger in a hoisting state, save the use of a chain block, reduce the labor cost required by hoisting, and reduce the hoisting construction time of the hydraulic plunger.
Description
Technical Field
The invention relates to ship construction, in particular to a hoisting method of a steering engine hydraulic plunger of a liquefied natural gas carrier and an auxiliary tool for hoisting.
Background
The steering engine of YAMAL LNG transport ship adopts hydraulic pressure form, and the quality of hydraulic pressure plunger is the key place that the steering engine can normally operate. After the peripheral main body structure of the steering engine room of the ship is built, when the problem of damage of a chromium coating on the surface of a plunger of the steering engine occurs, the damaged plunger needs to be lifted out through a lifting port arranged on a ceiling of the steering engine room, and then the plunger with qualified quality is lifted in and replaced.
The difficulty encountered in the hoisting process of the hydraulic plunger is mainly caused by the characteristics of the plunger, the length of the hydraulic plunger is about 5-6 meters, and the weight of the hydraulic plunger reaches 7 tons. And the surface of the plunger is extremely smooth, and the stress point is only provided with two screw holes reserved at two ends of the plunger. In addition, the surface of the plunger is provided with a chromium coating, and according to the action principle of the plunger, the surface of the replaced plunger cannot have any fine scratch, which means that the surface of the plunger cannot contact with objects on a construction site in the hoisting process.
The existing hoisting scheme is that lifting lugs with screws are screwed into screw holes at two ends of a plunger, and a crane and a chain block are used for supporting the two ends respectively. The difficulty mainly occurs at one end of the hand chain block, the steering engine is closely arranged, the space turnover is difficult, and the support end of the plunger hand chain block needs to be matched and hoisted by two to three blocks, so that the plunger is prevented from being scraped and rubbed with structures and other equipment, the operation is complex, and certain requirements are met on the number of workers and the technical level.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a novel hoisting method and a hoisting auxiliary tool for a steering engine hydraulic plunger of an LNG transport ship. The novel hoisting method and the hoisting auxiliary tool provided by the invention have the advantages that the operation is convenient and stable, and the condition that the hydraulic plunger is collided and damaged is avoided.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the hoisting method of the steering engine hydraulic plunger of the LNG carrier comprises the following steps:
the method comprises the steps that firstly, a manufactured steering engine hydraulic plunger is conveyed to a hoisting site, a hoisting ring with a screw is installed at one end face of the steering engine hydraulic plunger, the hoisting ring is screwed into an internal threaded hole in the end face of the steering engine hydraulic plunger through the screw to realize fixation, a special hoisting auxiliary tool is fixed at the end face of the other end of the steering engine hydraulic plunger, the hoisting auxiliary tool comprises a support, a plunger gasket, a shaft and bearing wheels, the shaft penetrates through the support, the two bearing wheels are fixed on two sides of the support through two ends of the shaft respectively, the support and the plunger gasket are screwed in an internal threaded hole in the end face of the plunger through a connecting bolt, and the plunger gasket is located between the support and the end face of the plunger;
secondly, a portal crane is used as a crane, the crane is connected with a steel wire rope and hangs and pulls a hanging ring at one end of a hydraulic plunger of the steering engine, and the hydraulic plunger of the steering engine is lifted and pulled upwards until one end of the auxiliary hoisting tool leaves the ground, so that the hydraulic plunger of the steering engine is in a vertical state and slowly moves to the position above a hoisting hole between the steering engines on the ship;
aligning a hydraulic plunger of the steering engine in a vertical state to the center position of the object hanging hole, controlling a crane to enable the hydraulic plunger of the steering engine to slowly fall down, enabling the hydraulic plunger of the steering engine to completely penetrate through the object hanging hole, keeping the steel wire rope in the center position of the object hanging hole until the hydraulic plunger of the steering engine is continuously lowered, and enabling a bearing wheel on a hoisting auxiliary tool positioned at the bottom of the hydraulic plunger of the steering engine to be in contact with a floor between the steering engines;
fourthly, the hydraulic plunger of the steering engine is continuously dropped, so that a bearing wheel of the hoisting auxiliary tool slowly moves forwards after bearing pressure, and the bearing wheel is controlled to slowly move forwards by the speed below the crane, so that a steel wire rope for hoisting the hydraulic plunger of the steering engine is kept stable, and the steel wire rope is continuously kept in a basically vertical state and is not contacted with the edge of the hoisting hole;
and fifthly, when the steering engine hydraulic plunger is close to the floor surface with one end hanging ring, placing two pieces of wood as protective supports at positions close to two ends of the steering engine hydraulic plunger respectively, continuing to place until the weight of the steering engine hydraulic plunger is completely born by the wood, detaching the hanging ring and the hoisting auxiliary tool respectively, and completing the hoisting work of the steering engine hydraulic plunger of the LNG carrier.
A hoisting auxiliary tool for a hydraulic plunger of a steering engine of an LNG transport ship is characterized by comprising a support, a plunger gasket, a shaft and a bearing wheel, wherein the support comprises a square main body and two triangular side supporting legs which are integrally arranged, the two triangular side supporting legs are vertically and respectively and oppositely fixed at two ends of the square main body, the side length of the square main body is larger than the diameter of the plunger, the square main body is provided with two through holes which correspond to the positions of the two self-contained internal threaded holes on the end surface of the plunger, the two side supporting legs are provided with through holes with opposite positions, and the shaft is erected on the support through the through holes on the two side supporting legs, the two ends of the shaft respectively extend out of the supporting legs at the two sides of the bracket, the two bearing wheels are respectively sleeved at the two ends of the shaft through a middle hole, the bearing wheels are limited at the two sides of the bracket through limit screws, the outer diameter of each bearing wheel is larger than the side length of the main body above the bracket, the plunger gasket is of a square block structure and is also provided with two through holes, the size and the position of each through hole on the plunger gasket are the same as those of the two through holes on the square main body and correspond to the two self-contained internal screw holes on the end surface of the plunger, and the plunger gasket is tightly attached to the square main body of the bracket; when the plunger is used, two connecting bolts respectively penetrate through the through hole of the square main body on the support and the through hole on the plunger gasket and are screwed in the inner screw hole on the end surface of the plunger, and the plunger gasket is positioned between the support and the end surface of the plunger.
In the auxiliary hoisting tool for the steering engine hydraulic plunger of the LNG carrier, the bracket, the bearing wheel, the shaft and the limiting screw are all cast by pig iron.
In the auxiliary hoisting tool for the steering engine hydraulic plunger of the LNG carrier, a limit screw gasket is arranged between the limit screw and the bearing wheel, and the limit screw gasket is an aluminum alloy gasket.
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, internal threads are respectively arranged at two ends of the shaft (4), and are matched with the external threads on the limiting screws (5).
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, the plunger gasket is of a square block structure made of rubber, and the side length of the square block structure is smaller than that of the main body above the bracket.
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, the isolation gaskets are respectively arranged between the support and the two bearing wheels and are made of aluminum alloy materials.
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, a gasket is arranged between the two connecting screws and the bracket and is made of an aluminum alloy material.
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, the limit screw sequentially penetrates through the limit screw gasket, the through hole in the bracket and the opening in the plunger gasket and is screwed into the reserved internal thread hole in the end face of the plunger.
Based on the technical scheme, compared with the prior art, the novel hoisting method and the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier have the following technical advantages through practical application:
1. the hoisting method provided by the invention solves the problem of hoisting both ends of the hydraulic plunger of the steering engine in the prior art, and changes the hoisting form by arranging a special hoisting auxiliary tool at one end according to the characteristics of construction occasions, so that the hydraulic plunger enters a hoisting port between the steering engines in a vertical mode, and is leveled on the floor by slowly moving the hoisting auxiliary tool, the whole hoisting process is stable and controllable, the swinging and the collision are avoided, the hydraulic plunger is protected to the maximum extent, the hoisting safety and the hoisting efficiency are improved, the use of a chain block can be omitted, the labor cost is saved, and the risk of rubbing the plunger with hull structures and equipment is reduced.
2. The invention designs a special hoisting auxiliary tool which comprises a support, a plunger gasket, a shaft and bearing wheels, wherein the shaft penetrates through the support, the two bearing wheels are respectively fixed on two sides of the support through two ends of the shaft, the support and the plunger gasket are screwed in an inner screw hole in the end face of a plunger through a connecting bolt, and the plunger gasket is positioned between the support and the end face of the plunger. When the hydraulic plunger is used, the hydraulic plunger, the plunger gasket and the support main body are tightly connected by using the connecting screw and the connecting screw gasket, and one end face of the plunger is protected to prevent the chromium coating from being damaged in the end face and the right-angle area of the end face; through the bearing wheel, can directly put the stress point subaerial when hydraulic plunger hoist and mount fall to the ground, reduce the dangerous coefficient that hoist and mount process plunger rocked the production, saved chain block's use simultaneously, reduce the hoist and mount time, practice thrift the cost of labor.
Drawings
Fig. 1 is an installation schematic diagram of a hoisting method of a steering engine hydraulic plunger of an LNG carrier.
Fig. 2 is a schematic component composition diagram of an auxiliary hoisting tool for a steering engine hydraulic plunger of an LNG carrier.
Fig. 3 is a schematic view of a combination of a bracket and a plunger gasket in the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier.
Fig. 4 is a combination schematic diagram of a bearing wheel and a shaft in the auxiliary hoisting tool for the hydraulic plunger of the steering engine of the LNG carrier.
Detailed Description
The following will explain the hoisting method and the hoisting auxiliary tool for the hydraulic ram of the steering engine of the LNG carrier in detail with reference to the accompanying drawings and specific embodiments, so as to clearly understand the structural composition and the operation implementation manner, but the protection scope of the present invention is not limited thereby.
In the LNG transport ship, a steering engine hydraulic plunger A is arranged in a rudder cabin, and the difficulty encountered in the hoisting process of the steering engine hydraulic plunger A is mainly caused by the characteristics of the plunger, the length of the hydraulic plunger is about 5-6 meters, and the weight of the hydraulic plunger reaches 7 tons. The surface of the plunger is extremely smooth, the stress point is only provided with two screw holes reserved at two ends of the plunger, the surface of the plunger is provided with a chromium coating, and according to the action principle of the plunger, the surface of the replaced plunger cannot be provided with any fine scratch, which means that the surface of the plunger cannot be contacted with objects on a construction site in the hoisting process. According to the structural characteristics and the hoisting requirements of the hydraulic plunger, the hoisting machine is based on a brand-new hoisting thought, two ends of the hydraulic plunger A of the steering engine are simultaneously hoisted and pulled to be changed into single-end hoisting and pulled, in addition, the hoisting and pulling become stable and controllable in a supporting mode by using an auxiliary tool, the hoisting efficiency and the hoisting quality are greatly improved, the risk of hoisting collision damage is greatly reduced, and the hoisting process is as shown in figure 1.
Based on the above thought, we have designed a special hoisting auxiliary tool, as shown in fig. 2, fig. 3 and fig. 4.
The invention relates to a hoisting auxiliary tool for a steering engine hydraulic plunger of an LNG carrier, which comprises a bracket 1, a plunger gasket 9, a shaft 4 and bearing wheels 2, wherein the bracket 1 comprises a square main body and two triangular side supporting legs which are integrally arranged, the two triangular side supporting legs are vertically and respectively fixed at two ends of the square main body oppositely, the side length of the square main body is larger than the diameter of the plunger, two through holes are arranged on the square main body and correspond to two self-contained inner screw holes on the end surface of the plunger, through holes with opposite positions are arranged on the two side supporting legs, the shaft 4 is erected on the bracket 1 by penetrating holes on the two side supporting legs, two ends of the shaft 4 respectively extend out from the two side supporting legs of the bracket, the two bearing wheels 2 are respectively sleeved at two ends of the shaft by a middle hole, the bearing wheels 2 are limited at two sides of the bracket 1 by limiting screws 5, the outer diameter of the bearing wheel 2 is larger than the side length of the square main body above the bracket 1, the plunger gasket 9 is of a square block structure, two through holes are also formed in the plunger gasket 9, the size and the position of the through holes in the plunger gasket 9 are the same as those of the two through holes in the square main body and correspond to two self-contained inner screw holes in the end face of the plunger, and the plunger gasket 9 is tightly attached to the square main body of the bracket 1; when the plunger piston is used, two connecting bolts 7 respectively penetrate through a through hole of the upper square main body of the bracket 1 and a through hole on the plunger piston gasket 9 and are screwed in an internal screw hole of the plunger piston end face, and the plunger piston gasket 9 is positioned between the bracket 1 and the plunger piston end face.
In the auxiliary hoisting tool for the steering engine hydraulic plunger of the LNG carrier, the support 1, the bearing wheel 2, the shaft 4 and the limiting screw 5 are all cast by pig iron, and because the parts are all cast by pig iron, the support strength is ensured, and meanwhile, the manufacturing cost is reduced.
In the auxiliary hoisting tool for the steering engine hydraulic plunger of the LNG carrier, the limiting screw gasket 6 is arranged between the limiting screw 5 and the bearing wheel 2, and the limiting screw gasket 6 is an aluminum alloy gasket. An isolation gasket 3 is arranged between the support 1 and the two bearing wheels 2 respectively, and the isolation gasket 3 is made of aluminum alloy. A gasket 8 is also arranged between the two connecting screws 7 and the bracket 1, and the gasket 8 is made of an aluminum alloy material. The gaskets are made of aluminum alloy, so that the weight is reduced, and the wear resistance is improved.
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, the plunger gasket 9 is of a square block structure made of rubber, and the rubber is wear-resistant and carries out buffer protection on a chromium-plated end face. For convenience of use, the side length of the square block-shaped structure is smaller than that of the upper body of the bracket 1.
In the hoisting auxiliary tool for the steering engine hydraulic plunger of the LNG carrier, internal threads are respectively arranged at two ends of the shaft 4 and are matched with the external threads on the limiting screw 5. And the limiting screw 7 sequentially penetrates through a limiting screw gasket 8, a through hole on the support 1 and an opening on the plunger gasket 9 and is screwed into a reserved internal thread hole on the end face of the plunger.
The concrete hoisting implementation mode based on the thought is as follows, the hydraulic plunger of the steering engine of the LNG carrier is of a cylindrical structure, the circumferential surface of the hydraulic plunger of the steering engine is provided with a chromium coating, the end surfaces of the two ends of the hydraulic plunger of the steering engine are also provided with chromium coatings, and the end surfaces of the two ends of the plunger are respectively provided with an inner screw hole, and the hoisting method comprises the following steps:
the method comprises the steps that firstly, a manufactured steering engine hydraulic plunger is conveyed to a hoisting site, a hoisting ring with a screw is installed at one end face of the steering engine hydraulic plunger, the hoisting ring is screwed into an internal threaded hole in the end face of the steering engine hydraulic plunger through the screw to realize fixation, a special hoisting auxiliary tool is fixed at the end face of the other end of the steering engine hydraulic plunger, the hoisting auxiliary tool comprises a support 1, a plunger gasket 9, a shaft 4 and bearing wheels 2, the shaft 4 penetrates through the support 1, the two bearing wheels 2 are respectively fixed at two sides of the support 1 through two ends of the shaft 4, the support 1 and the plunger gasket 9 are screwed in an internal threaded hole in the end face of the plunger through a connecting bolt 7, and the plunger gasket 9 is located between the support 1 and the end face of the plunger;
secondly, a portal crane is used as a crane, the crane is connected with a steel wire rope and hangs and pulls a hanging ring at one end of a hydraulic plunger of the steering engine, and the hydraulic plunger of the steering engine is lifted and pulled upwards until one end of the auxiliary hoisting tool leaves the ground, so that the hydraulic plunger of the steering engine is in a vertical state and slowly moves to the position above a hoisting hole between the steering engines on the ship;
aligning a hydraulic plunger of the steering engine in a vertical state to the center position of the object hanging hole, controlling a crane to enable the hydraulic plunger of the steering engine to slowly fall down, enabling the hydraulic plunger of the steering engine to completely penetrate through the object hanging hole, keeping the steel wire rope in the center position of the object hanging hole until the hydraulic plunger of the steering engine is continuously lowered, and enabling a bearing wheel on a hoisting auxiliary tool positioned at the bottom of the hydraulic plunger of the steering engine to be in contact with a floor between the steering engines;
fourthly, the hydraulic plunger of the steering engine is continuously dropped, so that a bearing wheel of the hoisting auxiliary tool slowly moves forwards after bearing pressure, and the bearing wheel is controlled to slowly move forwards by the speed below the crane, so that a steel wire rope for hoisting the hydraulic plunger of the steering engine is kept stable, and the steel wire rope is continuously kept in a basically vertical state and is not contacted with the edge of the hoisting hole;
and fifthly, when the steering engine hydraulic plunger is close to the floor surface with one end hanging ring, placing two pieces of wood as protective supports at positions close to two ends of the steering engine hydraulic plunger respectively, continuing to place until the weight of the steering engine hydraulic plunger is completely born by the wood, detaching the hanging ring and the hoisting auxiliary tool respectively, and completing the hoisting work of the steering engine hydraulic plunger of the LNG carrier.
When the hoisting auxiliary tool is used, two connecting screws 7 sequentially penetrate through two connecting screw gaskets 8, the bracket 1 and the plunger gasket 9 respectively and are screwed into two internal threads of the hydraulic plunger body, and the specifications of the connecting screws and the gaskets, the size positions of two holes on the bracket 1 and the size positions of two holes of the plunger gasket are determined according to the size positions of the internal threads of the plunger. Before the hydraulic plunger is lifted, the hydraulic plunger lifting device is well installed according to the method, the bearing wheel is in contact with the ground in the lifting process to play a role in bearing and supporting, and the bearing wheel is in contact with the ground in the falling process of the hydraulic plunger to play a role in bearing and supporting.
Claims (9)
1. The hoisting method of the steering engine hydraulic plunger of the LNG carrier comprises the following steps:
the method comprises the steps that firstly, a manufactured steering engine hydraulic plunger is conveyed to a hoisting site, a hoisting ring with a screw is installed at one end face of the steering engine hydraulic plunger, the hoisting ring is screwed into an internal threaded hole in the end face of the steering engine hydraulic plunger through the screw to realize fixation, a special hoisting auxiliary tool is fixed at the end face of the other end of the steering engine hydraulic plunger, the hoisting auxiliary tool comprises a support (1), a plunger gasket (9), a shaft (4) and bearing wheels (2), the shaft (4) penetrates through the support (1), the two bearing wheels (2) are fixed at two sides of the support (1) through two ends of the shaft (4), the support (1) and the plunger gasket (9) are screwed in an internal threaded hole in the end face of the plunger through a connecting bolt (7), and the plunger gasket (9) is located between the support (1) and the end face of the plunger;
secondly, a portal crane is used as a crane, the crane is connected with a steel wire rope and hangs and pulls a hanging ring at one end of a hydraulic plunger of the steering engine, and the hydraulic plunger of the steering engine is lifted and pulled upwards until one end of the auxiliary hoisting tool leaves the ground, so that the hydraulic plunger of the steering engine is in a vertical state and slowly moves to the position above a hoisting hole between the steering engines on the ship;
aligning a hydraulic plunger of the steering engine in a vertical state to the center position of the object hanging hole, controlling a crane to enable the hydraulic plunger of the steering engine to slowly fall down, enabling the hydraulic plunger of the steering engine to completely penetrate through the object hanging hole, keeping the steel wire rope in the center position of the object hanging hole until the hydraulic plunger of the steering engine is continuously lowered, and enabling a bearing wheel on a hoisting auxiliary tool positioned at the bottom of the hydraulic plunger of the steering engine to be in contact with a floor between the steering engines;
fourthly, the hydraulic plunger of the steering engine is continuously dropped, so that a bearing wheel of the hoisting auxiliary tool slowly moves forwards after bearing pressure, and the bearing wheel is controlled to slowly move forwards by the speed below the crane, so that a steel wire rope for hoisting the hydraulic plunger of the steering engine is kept stable, and the steel wire rope is continuously kept in a basically vertical state and is not contacted with the edge of the hoisting hole;
and fifthly, when the steering engine hydraulic plunger is close to the floor surface with one end hanging ring, placing two pieces of wood as protective supports at positions close to two ends of the steering engine hydraulic plunger respectively, continuing to place until the weight of the steering engine hydraulic plunger is completely born by the wood, detaching the hanging ring and the hoisting auxiliary tool respectively, and completing the hoisting work of the steering engine hydraulic plunger of the LNG carrier.
2. A hoisting auxiliary tool for a hydraulic plunger of a steering engine of an LNG transport ship is of a cylindrical structure, a chromium coating is arranged on the circumferential surface of the hydraulic plunger of the steering engine, chromium coatings are also arranged on the end surfaces of the two ends of the hydraulic plunger of the steering engine, and the end surfaces of the two ends of the plunger are respectively provided with an inner screw hole, and is characterized in that the hoisting auxiliary tool comprises a bracket (1), a plunger gasket (9), a shaft (4) and a bearing wheel (2), the bracket (1) comprises a square main body and two triangular side supporting legs which are integrally arranged, the two triangular side supporting legs are vertically and respectively and oppositely fixed at the two ends of the square main body, the side length of the square main body is larger than the diameter of the plunger, two through holes are arranged on the square main body and correspond to the positions of the two inner screw holes which are arranged on the end surface of the plunger, and through holes with opposite positions, the plunger type hydraulic support is characterized in that a shaft (4) penetrates through holes in supporting legs on two sides to be erected on a support (1), two ends of the shaft (4) respectively extend out of the supporting legs on the two sides of the support, two bearing wheels (2) are respectively sleeved at two ends of the shaft through a middle hole, the bearing wheels (2) are limited at two sides of the support (1) through limiting screws (5), the outer diameter of each bearing wheel (2) is larger than the side length of a main body above the support (1), a plunger gasket (9) is of a square block structure, two through holes are also formed in the plunger gasket (9), the size and the position of each through hole in the plunger gasket (9) are the same as those of the two through holes in the square main body and correspond to two self-provided internal screw holes in the end face of the plunger, and the plunger gasket (9) is tightly attached to the square main body of the support (1); when the plunger piston is used, two connecting bolts (7) respectively penetrate through a through hole of the upper square main body of the bracket (1) and a through hole on the plunger piston gasket (9) and are screwed in an inner screw hole of the plunger piston end face, and the plunger piston gasket (9) is positioned between the bracket (1) and the plunger piston end face.
3. The hoisting auxiliary tool for the hydraulic plunger of the steering engine of the LNG carrier as claimed in claim 2, wherein the support (1), the bearing wheel (2), the shaft (4) and the limit screw (5) are all cast by pig iron.
4. The steering engine hydraulic plunger hoisting auxiliary tool of the LNG carrier as claimed in claim 2, wherein a limit screw gasket (6) is arranged between the limit screw (5) and the bearing wheel (2), and the limit screw gasket (6) is an aluminum alloy gasket.
5. The steering engine hydraulic plunger hoisting auxiliary tool for the LNG carrier as claimed in claim 4, wherein internal threads are respectively arranged at two ends of the shaft (4) and are matched with external threads on the limit screws (5).
6. The steering engine hydraulic plunger hoisting auxiliary tool for the LNG carrier as claimed in claim 2, wherein the plunger gasket (9) is a square block structure made of rubber, and the side length of the square block structure is smaller than that of a main body above the upper bracket (1) of the bracket (1).
7. The steering engine hydraulic plunger hoisting auxiliary tool for the LNG carrier as claimed in claim 2, wherein isolation gaskets (3) are respectively arranged between the support (1) and the two bearing wheels (2), and the isolation gaskets (3) are made of aluminum alloy.
8. The steering engine hydraulic plunger hoisting auxiliary tool for the LNG carrier as claimed in claim 6, wherein a gasket (8) is arranged between the two connecting screws (7) and the bracket (1), and the gasket (8) is made of an aluminum alloy material.
9. The steering engine hydraulic plunger hoisting auxiliary tool for the LNG carrier as claimed in claim 8, wherein the limit screw (7) sequentially penetrates through the limit screw gasket (8), the through hole in the bracket (1) and the opening in the plunger gasket (9) and is screwed into the reserved internal thread hole in the end face of the plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812481.1A CN112125137A (en) | 2020-08-13 | 2020-08-13 | Hoisting method and hoisting auxiliary tool for steering engine hydraulic plunger of LNG transport ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812481.1A CN112125137A (en) | 2020-08-13 | 2020-08-13 | Hoisting method and hoisting auxiliary tool for steering engine hydraulic plunger of LNG transport ship |
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| CN112125137A true CN112125137A (en) | 2020-12-25 |
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| CN202010812481.1A Pending CN112125137A (en) | 2020-08-13 | 2020-08-13 | Hoisting method and hoisting auxiliary tool for steering engine hydraulic plunger of LNG transport ship |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153012A (en) * | 2011-03-30 | 2011-08-17 | 太原重工股份有限公司 | Tool for hoisting hydraulic cylinder body and plunger |
| CN204980895U (en) * | 2015-09-02 | 2016-01-20 | 山东电力建设第一工程公司 | Transmission line act as go -between supplementary dolly of ta lita and hoist and mount system |
| CN106352158A (en) * | 2016-11-30 | 2017-01-25 | 二十二冶集团天津建设有限公司 | Pipe gallery pipeline transporting and installing method |
-
2020
- 2020-08-13 CN CN202010812481.1A patent/CN112125137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153012A (en) * | 2011-03-30 | 2011-08-17 | 太原重工股份有限公司 | Tool for hoisting hydraulic cylinder body and plunger |
| CN204980895U (en) * | 2015-09-02 | 2016-01-20 | 山东电力建设第一工程公司 | Transmission line act as go -between supplementary dolly of ta lita and hoist and mount system |
| CN106352158A (en) * | 2016-11-30 | 2017-01-25 | 二十二冶集团天津建设有限公司 | Pipe gallery pipeline transporting and installing method |
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