CN115256260B - Method for assisting in positioning oil return hole of lubricating oil circulation cabin of main engine - Google Patents
Method for assisting in positioning oil return hole of lubricating oil circulation cabin of main engine Download PDFInfo
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- CN115256260B CN115256260B CN202210826994.7A CN202210826994A CN115256260B CN 115256260 B CN115256260 B CN 115256260B CN 202210826994 A CN202210826994 A CN 202210826994A CN 115256260 B CN115256260 B CN 115256260B
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- return hole
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- positioning
- main engine
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- 239000003921 oil Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 39
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
The invention relates to a method for assisting in positioning an oil return hole of a main engine lubricating oil circulation cabin, wherein the main engine lubricating oil circulation cabin is arranged at the bottom of a main engine, the oil return hole is arranged on a main engine pit, and a plurality of main engine bolt holes are correspondingly arranged on two sides of the main engine pit, and the method comprises the following steps: firstly, manufacturing a special wire pulling device for assisting in positioning an oil return hole of a lubricating oil circulation cabin, and secondly, placing the special wire pulling device at a pit of a main machine, and adjusting the special wire pulling device to enable the upper surface of the special wire pulling device to be level with the top of the pit of the main machine; thirdly, according to the theoretical coordinate X value of the oil return hole, regulating the special wire pulling device to determine the position of the actual oil return hole in the X direction; fourthly, determining the position of the oil return hole according to the theoretical coordinate Y value of the oil return hole; fifthly, utilizing a wire pendant on the adjusting wire pulling device to open holes of the rear oil return holes when the positioning marks are arranged on the bottom plane of the main machine pit. The method of the invention uses the device to carry out paying-off positioning, and has the advantages of high precision, visual observation and high reliability.
Description
Technical Field
The invention relates to ship construction, in particular to a method for assisting in positioning an oil return hole of a lubricating oil circulation cabin of a main engine.
Background
In ship construction, host oil is one of the important systems for ensuring safe operation of host equipment. The main function of the device is to lubricate the friction accessory inside the host, reduce the friction force of the machine parts, reduce friction power loss, improve mechanical efficiency and prolong the service life of the device. The lubricating oil circulation of the main machine cleans sediment, friction products, external pollutants and the like generated by the main machine in operation from the working surface, and finally the sediment, the friction products, the external pollutants and the like are discharged to the lubricating oil circulation cabin through an oil return hole of the main machine. Therefore, the accurate positioning of the oil return hole of the lubricating oil circulation cabin is not only the requirement of the installation of the main engine, but also influences the normal operation of the lubricating oil system of the main engine.
One of the common methods for positioning the oil return hole of the main engine lubricating oil circulation cabin at present is to use a total station, take a certain point as a datum point, determine the position of the oil return hole opening through the position of the oil return hole relative to the datum point, but the positioning accuracy is greatly reduced under the condition that the environment is poor, the light is poor and the surface of the ship body structure has accumulated water. In addition, the method directly utilizing the straight ruler to pull the wire to pay off is difficult to grasp due to direct manual operation, and the method is directly put on the horizontal pull wire or the straight ruler during paying off, so that the horizontal pull wire is easy to bend and the positioning deviation exists.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a novel method for positioning an oil return hole of an auxiliary main engine lubricating oil circulation cabin. The method of the invention uses the special stay wire positioning device to avoid the occurrence of the defects, reduces errors, is convenient to operate, saves manpower and reduces working hours, and ensures that the oil return hole is positioned in place in one step.
In order to achieve the above object, the present invention provides the following technical solutions:
The method for assisting in positioning oil return holes of a main engine lubricating oil circulation cabin is arranged at the bottom of a main engine, sediment, abrasion products and external pollutants generated by the main engine during operation circulate from lubricating oil, the sediment, abrasion products and external pollutants are discharged into the lubricating oil circulation cabin through the oil return holes of the main engine, the oil return holes are formed in the bottom plane of a main engine pit, and a plurality of main engine bolt holes are correspondingly formed in two sides of the main engine pit respectively, and the method comprises the following implementation steps:
The first step, a special wire pulling device for assisting the positioning of an oil return hole of an oil circulation cabin is manufactured,
Secondly, placing the special wire pulling device at the pit of the host machine, and adjusting the special wire pulling device to enable the upper surface of the special wire pulling device to be level with the top of the pit of the host machine;
thirdly, according to the theoretical coordinate X value of the oil return hole, regulating the special wire pulling device to determine the position of the actual oil return hole in the X direction;
fourthly, determining the position of the oil return hole according to the theoretical coordinate Y value of the oil return hole;
Fifthly, utilizing a wire pendant on the adjusting wire pulling device to position and mark on the bottom plane of the pit of the host machine, and carrying out tapping operation of the oil return hole after positioning and marking are completed.
In the first step, special stay wire device structurally include gear steering mechanism, main part upper housing, upper cover, main part lower casing, altitude mixture control support, line weight, adjusting bolt and horizontal stay wire, gear steering mechanism set up main part upper housing and main part lower casing between, main part upper housing and main part lower casing link together through the fixing bolt of both sides the main part upper housing top be equipped with the upper cover, the bottom of main part lower casing rotationally place in altitude mixture control support on, this altitude mixture control support bottom be equipped with rotatable adjusting bolt, line weight upper portion twine on gear steering mechanism, the line weight passes the through-hole at main part lower casing middle part stretches into between the altitude mixture control support upper cover and main part upper housing between be equipped with the wiring passageway that transversely runs through, horizontal stay wire pass the wiring passageway on the upper housing still be equipped with the bubble level gauge.
In the second step, the height adjustment is realized through the height adjustment bracket and the adjusting bolt, the levelness is judged according to the bubble level on the main body upper shell, the direction adjustment is realized by rotating the main body lower shell positioned on the height adjustment bracket, and the height adjustment bracket is adjusted to enable the horizontal stay wire in the wiring channel and the upper surfaces on two sides of the main machine pit to be kept on the same horizontal plane.
In the third step, the theoretical coordinate X value of the oil return hole is determined according to the positions of the base bolt holes of the main machine, two base bolt holes closest to the oil return hole are selected, theoretical position points are measured and determined, two ends of a horizontal stay wire on a special stay wire device are respectively fixed on the theoretical position points on two sides of a pit of the main machine by using magnetic fixing pieces, the position of the oil return hole on a straight line where the horizontal stay wire is located is determined, and therefore the position of the oil return hole in the X direction is determined;
In the fourth step, the distance value from the fixed points at the two ends of the horizontal stay wire to the center of the special stay wire device is measured, the two obtained distance values are calculated to obtain a difference value, half of the difference value is the theoretical coordinate Y value of the oil return hole, and the position of the oil return hole is finally determined through the X value and the Y value.
In the fifth step, the special wire pulling device is moved to the position of the oil return hole, the gear steering mechanism is rotated, the wire plummet falls to the bottom close to the pit of the main machine, and the positioning mark is made at the position of the opening. If the situation that the side wind is large is met, the line drop is taken down, and the laser pen at the same position is used for operating the knocking point.
In the special wire pulling device, gear teeth are arranged on the upper main body shell and the lower main body shell and meshed with gears on the gear steering mechanism, the gear steering mechanism can move back and forth to be in contact with and separate from the upper main body shell and the lower main body shell, engagement limiting is realized during contact, the wire plummet is in a limiting position during engagement limiting, and the wire plummet and the horizontal wire pulling wire are in the same vertical plane.
In the special wire pulling device, ring parts for ensuring that the horizontal wires are not bent are arranged at the extending positions of the horizontal wires at the two sides of the upper shell of the main body at the two ends of the wire passage.
In the special wire pulling device, a laser pen for checking whether the horizontal wire pulling is bent or not is further arranged on the main body upper shell.
Based on the technical scheme, the method for assisting in positioning the oil return hole of the lubricating oil circulation cabin of the main engine has the following technical advantages through practical application:
1. The method for assisting in positioning the oil return holes of the lubricating oil circulation cabin of the host fully utilizes the theoretical X value and the theoretical Y value of the oil return holes, takes the bolt holes of the host as the basis, accurately positions the positions of the oil return holes in the pits of the host, provides positioning marks for subsequent holes, realizes accurate positioning, and can determine two oil return holes in each pit of the host in this way.
2. The method for assisting the positioning of the oil return hole of the lubricating oil circulation cabin of the host machine is provided with the special wire pulling device for positioning, the determination of the X value and the Y value is accurately realized, and compared with the method which is difficult to operate and easy to deviate when the wire pulling device is directly operated, the method directly utilizes the device for wire pulling positioning, has high reliability, and can visually see whether the actual positioning deviates from the theoretical value when checking.
3. The method for assisting in positioning the oil return hole of the main engine lubricating oil circulation cabin is free from the environmental influences of light rays, whether the ship body structure has accumulated water or not and the like, has wide application range, can better ensure the accurate positioning of the oil return hole of the main engine lubricating oil circulation cabin, effectively avoids the problem of positioning deviation, is convenient for personnel to construct, greatly improves the working efficiency and reduces the working time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the operation flow of a method for assisting in positioning an oil return hole of a main engine lubricating oil circulation cabin.
Fig. 2 is a schematic diagram of a front view structure of a special wire pulling device in a method for assisting in positioning an oil return hole of a main engine lubricating oil circulation cabin.
Fig. 3 is a schematic side view of a special wire pulling device in a method for assisting in positioning an oil return hole of a main engine lubricating oil circulation cabin.
Fig. 4 is a top view showing the operation state of the method for assisting in positioning the oil return hole of the main engine lubricating oil circulation cabin.
FIG. 5 is a side view of the method of the present invention in operation for assisting in locating the oil return hole of the main engine oil circulation tank.
Wherein, 1, gear rotating mechanism 2, main body upper shell 3, upper cover 4, main body lower shell 5, height adjusting bracket 6, wire weight 7, adjusting bolt 8, horizontal pull wire 9, magnetic attraction type fixing piece 10, small bubble level 11 and fixing bolt
Detailed Description
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In order to better locate and excavate the oil return hole corresponding to the main engine lubricating oil circulation cabin, a special wire pulling device is designed.
As shown in fig. 2 and 3, the special wire pulling device structurally comprises a gear steering mechanism 1, a main body upper shell 2, an upper cover 3, a main body lower shell 4, a height adjusting bracket 5, a wire weight 6, an adjusting bolt 7 and a horizontal wire pulling line 8. The gear steering mechanism 1 is arranged between the main body upper shell 2 and the main body lower shell 4, and the main body upper shell 2 and the main body lower shell 4 are connected together through fixing bolts 11 at two sides to form an integrated shell. The top of the main body upper shell 2 is provided with the upper cover 3, and the bottom of the main body lower shell 4 is rotatably arranged on the height adjusting bracket 5.
The bottom of the height adjusting bracket 5 is provided with a rotatable adjusting bolt 7, the upper part of the wire pendant 6 is wound on the gear steering mechanism 1, and the wire pendant 6 penetrates through a through hole in the middle of the main body lower shell 4 to extend into the space between the height adjusting brackets 5. The bottom of the height adjusting bracket 5 can be adjusted in height by using an adjusting bolt 7, the levelness of the device after the height is adjusted can be confirmed by a small bubble level 10 in the main body upper shell 2, and the device can be adjusted again in an adaptive manner until the device is in a horizontal state completely.
A transverse through wiring channel is arranged between the upper cover 3 and the main body upper shell 2, the horizontal pull wire 8 passes through the wiring channel, and the upper shell 2 is also provided with a bubble level meter 10.
In the special wire pulling device, the main body upper shell 2 and the main body lower shell 4 are provided with gear teeth which are meshed with gears on the gear steering mechanism 1, the gear steering mechanism 1 can move back and forth to be contacted with and separated from the main body upper shell 2 and the main body lower shell 4, the wire pulling device realizes meshing limit when contacted with the main body upper shell 2 and the main body lower shell 4, the wire pulling device is in a limit position when meshed with the main body upper shell 2 and the main body lower shell 4, and the wire pulling device 6 and the horizontal wire pulling device 8 are positioned on the same vertical plane.
In the special wire pulling device, ring parts for ensuring that the horizontal wires 8 are not bent are arranged at the extending positions of the horizontal wires 8 at the two sides of the main body upper shell 2 at the two ends of the wire passage. The main body upper shell 2 is also provided with a laser pen for checking whether the horizontal stay wire 8 is bent or not. The wiring channel for accommodating the horizontal stay wire 8 to pass through is small enough, and the horizontal stay wire 8 extends out of two sides of the shell to place annular parts, so that the stay wire is prevented from bending and shifting, and is always perpendicular to the X direction, and the laser pen on the shell can be used for inspection.
The special wire pulling device is not only suitable for positioning oil return holes of lubricating oil circulation cabins of different ship-type main engines, but also can be popularized to the similar hole positioning problem. The position of the oil return hole of the lubricating oil circulation cabin of the host can be quickly determined, and the environment requirement in the process is low. And under the condition that the ship body structure has water in rainy days, the traditional total station positioning method has certain errors in positioning. The traditional direct utilization ruler and the line drop are complicated to position, and the direct manual paying-off drop is difficult to operate, difficult to grasp and easy to cause deviation.
As shown in fig. 1, the invention provides a method for assisting in positioning an oil return hole of a lubricating oil circulation cabin of a host, which adopts the special wire pulling device for positioning, and specifically comprises the following steps:
First, a special wire pulling device N for assisting in positioning an oil return hole of an oil circulation cabin is manufactured, wherein the special wire pulling device N structurally comprises a gear steering mechanism 1, a main body upper shell 2, an upper cover 3, a main body lower shell 4, a height adjusting bracket 5, a wire weight 6, an adjusting bolt 7 and a horizontal wire pulling wire 8.
And secondly, placing the special wire drawing device N at the pit of the host machine, and adjusting the special wire drawing device N to enable the upper surface of the special wire drawing device N to be flush with the top of the pit of the host machine. The height adjustment is realized through the height adjustment bracket 5 and the adjusting bolt 7, the levelness is judged according to the bubble level 10 on the main body upper shell 2, the direction adjustment is realized by rotating the main body lower shell 4 positioned on the height adjustment bracket 5, and the height adjustment bracket 5 is adjusted to enable the horizontal pull wire 8 in the wire channel and the upper surfaces on two sides of the main machine pit to be kept on the same horizontal plane, as shown in fig. 4 and 5.
Thirdly, according to the theoretical coordinate X value of the oil return hole, regulating the special wire pulling device N to determine the position of the actual oil return hole in the X direction; the theoretical coordinate X value of the oil return hole is determined according to the position of the host machine foot bolt holes M, two host machine foot bolt holes M closest to the oil return hole are selected, theoretical position points are measured and determined, two ends of a horizontal pull wire on a special pull wire device N are respectively fixed on the theoretical position points on two sides of a host machine pit by using a magnetic fixing piece 9, the oil return hole is determined to be positioned on a straight line of the horizontal pull wire 8, and therefore the position of the oil return hole in the X direction is determined, as shown in fig. 4 and 5.
Fourthly, determining the position of the oil return hole according to the theoretical coordinate Y value of the oil return hole; and measuring the distance value from the fixed points at the two ends of the horizontal stay wire 8 to the center of the special stay wire device, and calculating the difference value between the two obtained distance values, wherein half of the difference value is the theoretical coordinate Y value of the oil return hole, and finally determining the position of the oil return hole through the X value and the Y value, as shown in fig. 4 and 5.
Fifthly, utilizing a wire pendant 6 on the wire pulling device to adjust, marking the positioning on the bottom plane of the pit of the host machine, and carrying out tapping operation of the oil return hole after positioning and marking are completed. During operation, the special wire pulling device is moved to the position of the oil return hole, the gear steering mechanism 1 is rotated, the wire plummet 6 falls to the bottom close to the pit of the host machine, and the positioning mark is made at the position of the opening. If the situation that the lateral wind is large is met, the line drop 6 is taken down, and the laser pen at the same position is used for operating the knocking point.
The horizontal stay wire 8 can be used for replacing wires with corresponding lengths according to the left-right spacing of the bolt holes of the main frame of different ship types, and the wires can be marked by a certain distance. In addition, the position of the device in the Y direction can be intuitively seen by installing the scale on the shell, so that the theoretical position of the oil return hole can be found out most quickly.
Compared with the problem that the direct manual paying-off pendant is difficult to operate and is easy to deviate, the paying-off positioning device is simple, visual and convenient to operate, the paying-off positioning is directly performed by using the device, the reliability is high, and whether the deviation exists between the actual positioning and the theoretical value can be visually seen when checking. Compared with a total station positioning method, the method is free from the environmental influence of light rays, whether the ship body structure has ponding and the like, and has a wide application range. The invention can better ensure the accurate positioning of the oil return hole of the main engine lubricating oil circulation cabin, effectively avoid the problems, facilitate the construction of personnel, greatly improve the working efficiency and reduce the working time.
Claims (10)
1. The method for assisting in positioning oil return holes of a main engine lubricating oil circulation cabin is characterized in that the oil return holes are formed in the bottom plane of a main engine pit, and a plurality of main engine bolt holes are correspondingly formed in two sides of the main engine pit respectively, and the method comprises the following implementation steps:
The first step, a special wire pulling device for assisting the positioning of an oil return hole of an oil circulation cabin is manufactured,
Secondly, placing the special wire pulling device at the pit of the host machine, and adjusting the special wire pulling device to enable the upper surface of the special wire pulling device to be level with the top of the pit of the host machine;
thirdly, according to the theoretical coordinate X value of the oil return hole, regulating the special wire pulling device to determine the position of the actual oil return hole in the X direction;
fourthly, determining the position of the oil return hole according to the theoretical coordinate Y value of the oil return hole;
Fifthly, utilizing a wire pendant on the adjusting wire pulling device to position and mark on the bottom plane of the pit of the host machine, and carrying out tapping operation of the oil return hole after positioning and marking are completed.
2. The method for positioning the oil return hole of the auxiliary main engine lubricating oil circulation cabin according to claim 1, wherein in the first step, the special wire pulling device structurally comprises a gear steering mechanism (1), a main body upper shell (2), an upper cover (3), a main body lower shell (4), a height adjusting bracket (5), a wire weight (6), an adjusting bolt (7) and a horizontal wire pulling wire (8), the gear steering mechanism (1) is arranged between the main body upper shell (2) and the main body lower shell (4), the upper shell (2) and the main body lower shell (4) are connected together through fixing bolts at two sides, the top of the main body upper shell (2) is provided with the upper cover (3), the bottom of the main body lower shell (4) is rotatably arranged on the height adjusting bracket (5), the bottom of the height adjusting bracket (5) is provided with a rotatable adjusting bolt (7), the upper part of the wire weight (6) is wound on the gear steering mechanism (1), the wire (6) passes through the middle part of the main body lower shell (4) to penetrate through the height adjusting bracket (5) and passes through the horizontal wire pulling wire passing through the upper cover (3) and passes through the horizontal channel (8), the upper shell (2) is also provided with a bubble level (10).
3. The method for assisting in positioning oil return holes of a lubricating oil circulation cabin of a host machine according to claim 2, wherein in the second step, the height adjustment is realized through a height adjustment bracket (5) and an adjusting bolt (7), the levelness is judged according to a bubble level (10) on a main body upper shell (2), the direction adjustment is realized by rotating a main body lower shell (4) arranged on the height adjustment bracket (5), and the height adjustment bracket (5) is adjusted to enable the horizontal pull wires (8) in the wiring channel and the upper surfaces on two sides of a pit of the host machine to be kept on the same horizontal plane.
4. The method for assisting in positioning oil return holes of a main engine lubricating oil circulation cabin according to claim 2, wherein in the third step, the theoretical coordinate X value of the oil return holes is determined according to the positions of the base bolt holes of the main engine, two base bolt holes closest to the oil return holes are selected, theoretical position points are determined by measurement, two ends of a horizontal stay wire (8) on a special stay wire device are respectively fixed on the theoretical position points on two sides of a pit of the main engine by using magnetic fixing pieces (9), and the positions of the oil return holes in the X direction are determined by determining that the oil return holes are positioned on a straight line where the horizontal stay wire (8) is positioned.
5. The method for assisting in positioning the oil return hole of the lubricating oil circulation cabin of the main engine according to claim 2, wherein in the fourth step, the distance value from the fixed points at the two ends of the horizontal stay wire (8) to the center of the special stay wire device is measured, the obtained two distance values are subjected to difference value, half of the difference value is the theoretical coordinate Y value of the oil return hole, and the position of the oil return hole is finally determined through the X value and the Y value.
6. The method for assisting in positioning the oil return hole of the lubricating oil circulation cabin of the host machine according to claim 2, wherein in the fifth step, the special wire pulling device is moved to the position of the oil return hole, the gear steering mechanism (1) is rotated, the wire weight (6) is enabled to fall to the bottom close to the pit of the host machine, and positioning marks are made at the position of the opening.
7. The method for assisting in positioning oil return holes of a main engine lubricating oil circulation cabin according to claim 2, wherein in the fifth step, if a condition of large lateral wind is encountered, the drop wire (6) is taken off and the operating knocking point is performed by using a laser pen at the same position.
8. The method for assisting in positioning oil return holes of a main engine lubricating oil circulation cabin according to claim 2, wherein gear teeth are arranged on the upper main engine shell (2) and the lower main engine shell (4), the gear teeth are meshed with gears on the gear steering mechanism (1), the gear steering mechanism (1) can move back and forth to be contacted with and separated from the upper main engine shell (2) and the lower main engine shell (4), meshing limit is achieved during contact, the wire weight (6) is located at a limit position during meshing limit, and the wire weight (6) and the horizontal stay wire (8) are located on the same vertical plane.
9. The method for assisting in positioning the oil return hole of the lubricating oil circulation cabin of the main engine according to claim 2, wherein ring parts for ensuring that the horizontal stay wires (8) are not bent are arranged at the extending positions of the horizontal stay wires (8) at the two sides of the upper shell (2) of the main body at the two ends of the wiring channel.
10. The method for assisting in positioning the oil return hole of the main engine lubricating oil circulation cabin according to claim 2, wherein a laser pen for checking whether the horizontal stay wire (8) is bent or not is further arranged on the main body upper shell (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210826994.7A CN115256260B (en) | 2022-07-14 | 2022-07-14 | Method for assisting in positioning oil return hole of lubricating oil circulation cabin of main engine |
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| CN110254619A (en) * | 2019-07-01 | 2019-09-20 | 中船澄西船舶修造有限公司 | A kind of orientation installation fixture and installation method of Cargo Oil Pump |
| CN113503856A (en) * | 2021-07-30 | 2021-10-15 | 中铁工程装备集团有限公司 | Tunnel trolley positioning measurement method and system |
| CN113653344A (en) * | 2021-09-08 | 2021-11-16 | 中建八局第二建设有限公司 | Construction method for laser-assisted positioning and hole opening and laser positioning device |
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