CN112455624A - Mounting method of acoustic log - Google Patents
Mounting method of acoustic log Download PDFInfo
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- CN112455624A CN112455624A CN202011411783.4A CN202011411783A CN112455624A CN 112455624 A CN112455624 A CN 112455624A CN 202011411783 A CN202011411783 A CN 202011411783A CN 112455624 A CN112455624 A CN 112455624A
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- base
- installation
- ship
- acoustic log
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
Abstract
The invention provides an installation method of an acoustic log, which comprises the following steps: A. introducing the corrected center line of the ship body into an installation cabin, marking a straight line perpendicular to a fore-aft marker line at the installation rib position, and marking a base installation center on the cabin ground; B. aligning the center of the base with the marked mounting center of the base, aligning the fore-aft line of the base with the fore-aft marking line on the cabin ground, and then welding the base on the cabin ground; C. checking the installation quality of the base and ensuring that the installation direction of the base meets the precision requirement; D. and placing the acoustic log in the base to finish the sealing installation of the acoustic log. The acoustic log has the beneficial effects that the mounting method of the acoustic log is provided, the problems that sea grass is easy to hook and break and the acoustic log is easy to be influenced by Wen flow due to the fact that a rod-type sensor of the electromagnetic log extends out of the bottom of a ship to measure speed in the past are solved, the acoustic log can provide the ground speed and the transverse moving speed of the ship, and the navigation precision of the ship navigation equipment is improved to a certain extent.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to an installation method of an acoustic log.
Background
In the middle of the 20 th century, an electromagnetic log is generally used as a novel navigation instrument in a ship navigation system, provides the water-oriented navigational speed when a ship advances and retreats, and assists in measuring the ship range. With the advent of large ships and other navigation and positioning requirements, ships need to acquire the forward and backward water speed, and also need to acquire the ground speed and the traversing speed of the ships through a navigation system when the ships enter and exit and berth a wharf. To meet new requirements, acoustic odometers are developed and subsequently added to ship navigation systems. The speed measurement principle of the acoustic log is as follows: the method is characterized in that a transducer is adopted to emit an acoustic pulse signal with a certain frequency to the seabed, and the ship motion parameter information is measured by detecting the time delay and the frequency difference (namely the acoustic frequency shift phenomenon) between an echo signal and an emitted signal. The acoustic log can provide longitudinal and transverse two-dimensional speeds of the ship relative to the sea bottom or water layer, the speed of the ship is not easily influenced by Wen flow, and the ship is accurate and stable; when the ship turns in a maneuver, the acoustic log cannot distort the speed; in the aspect of speed measurement precision calibration, the acoustic log only needs single-point calibration, and has unique advantages.
At present, the installation method of the acoustic log in the market is blank, and a feasible log installation method is urgently needed in order to promote the development of the ship navigation technology.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide a method for mounting an acoustic log.
The invention provides an installation method of an acoustic log, which comprises the following steps:
A. introducing the corrected center line of the ship body into an installation cabin, marking a straight line perpendicular to a fore-aft marker line at the installation rib position, and marking a base installation center on the cabin ground;
B. aligning the center of the base with the marked mounting center of the base, aligning the fore-aft line of the base with the fore-aft marking line on the cabin ground, and then welding the base on the cabin ground;
C. checking the installation quality of the base and ensuring that the installation direction of the base meets the precision requirement;
D. and placing the acoustic log in the base to finish the sealing installation of the acoustic log.
Preferably, in step B, three temporary fixing frames are welded at the bottom of the bottom plate hole, and the base is placed on the temporary fixing frames, so that the lower plane of the base is well attached to the lower opening of the bottom plate hole.
Preferably, in the step B, in order to avoid the influence of bubbles in the front, a mounting base is selected at the bottom of the U-shaped ship, so as to ensure that the planar radiation surface of the subsequent transducer array is completely in a common shape with the ship bottom; if the ship is unconditionally completely in the same shape with the ship bottom, a diversion cover needs to be welded on the outer plate of the ship body.
Preferably, in step C, the levelness of the base is detected with a total station.
Preferably, in step D, a gate valve is used to assist in sealing the acoustic log.
The acoustic log has the beneficial effects that the mounting method of the acoustic log is provided, the problems that sea grass is easy to hook and break and the acoustic log is easy to be influenced by Wen flow due to the fact that a rod-type sensor of the electromagnetic log extends out of the bottom of a ship to measure speed in the past are solved, the acoustic log can provide the ground speed and the transverse moving speed of the ship, and the navigation precision of the ship navigation equipment is improved to a certain extent.
Drawings
FIG. 1 is a schematic illustration of an acoustic odometer when unconditionally conformal installed;
FIG. 2 is a cross-sectional view of an acoustic odometer;
fig. 3 is an enlarged view at a in fig. 2.
Element number description:
1 hull plate
2 air guide sleeve
3 base
41 transducer array
42 array sheath
5 sealing gasket
6 gate valve
61 hand wheel of valve
7 upper flange
8 sealing flange
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The acoustic log is installed on the cabin floor through a base, and the following preparation work is carried out before the base is installed:
1. the base is qualified through inner field processing inspection;
2. the main ship body is folded, the center line of a deck is corrected according to a ship berth carrying method, and welding is carried out after the cabin bow and stern line mark plates are finished; during welding, the main welding work of adjacent cabins is basically finished, and the deformation and stress of the ship body are released;
3. measuring instruments such as a standard ruler, a heavy hammer, a laser theodolite and the like have measurement qualification certificates, and the measurement precision of the instruments meets the measurement requirement of measured parameters in the valid period;
4. and cleaning an installation site.
Referring to fig. 1 and 2, a method for mounting an acoustic log according to the present invention includes the steps of:
A. and introducing the corrected central line of the ship body into an installation cabin, marking a straight line perpendicular to the fore-aft marker line at the installation rib position, and marking the installation center of the base on the cabin ground.
B. Determining the head and tail directions of the base according to the drawing, aligning the center of the base 3 with the marked mounting center of the base, and aligning the fore-aft line of the base 3 with the fore-aft marking line on the cabin ground. Three temporary fixing frames are welded at the bottom of the ship bottom plate hole, the base 3 is placed on the temporary fixing frames, and the lower plane of the base 3 is well attached to the lower opening of the ship bottom plate hole. If not, the adjustment is carried out properly until the fit is good, and the levelness, the parallelism with the stem line and the included angle are ensured to meet the technical requirements. The base 3 is then welded to the cabin floor. In order to avoid the influence of front bubbles, the base 3 is installed at the position of the U-shaped ship bottom, so that the plane type radiation surface of the subsequent transducer array 41 is ensured to be completely in the same shape with the ship bottom, and cavitation is prevented from being generated at high speed; if the ship is unconditionally completely shaped with the ship bottom, the diversion cover 2 needs to be welded on the ship outer plate 1. The welding of the base 3 is preferably carried out at night, because the influence of the temperature at night on the deformation of the ship body is small. Welding monitoring is needed in the welding process of the base 3, and the level of the base 3 and the fore-aft index requirements are guaranteed.
C. After the welding of the base 3 is finished, the corresponding accuracy of the installation position of the base 3 and the fore-aft line mark of the cabin is ensured to be less than 0.5 degree through the means of grinding and the like for the out-of-tolerance items through the inspection of related personnel. The levelness of the base 3 can be detected by a high-precision optical clinometer total station, and the fitting precision of the base installation direction and the cabin fore-aft line mark is detected by adopting a plumb line method or a laser theodolite.
D. The preparation work before installation of the acoustic log includes checking the instruments and tools for installation, preparing bolts, nuts, washers, ground wires, etc. according to the drawings, and cleaning the installation site. After preparation work is done, the installation and protection of the acoustic log are started:
as shown in fig. 2 and 3, a gasket 5 is provided between the gate valve 6 and the base 3, and a matrix sheath 42 is provided outside a transducer matrix 41 of the acoustic odometer. The upper flange 7 is sleeved on the matrix sheath 42, an O-shaped ring and the sealing flange 8 are sequentially sleeved on the matrix sheath 42, and the upper flange 7 is slowly placed at the bottom. Clamping the array sheath 42 by a Haff clamp plate, placing the transducer array 41, the array sheath 42 and the flange assembly on the gate valve 6 by a hoisting tool, connecting a valve hand wheel 61 of the gate valve 6 with the transducer array 41, aligning the upper flange 7 with a stem and stern scale line of a ship, and fastening by a fastening piece (the sound transmission surface of the transducer array 41 is not allowed to touch a valve body and other hard objects in the whole installation). Installing a sealing flange 8, carefully checking the installation conditions of all places, opening the gate valve 6 after confirming that the sealing performance is good, trying to rotate a valve hand wheel 61 by using a tool when seeing that a pointer at the hand wheel points to an opening scale line, and putting down the transducer array 41 after confirming that the valve of the water gate valve is completely opened until the scale line on the array sheath 42 is flush with the end face of the sealing flange 8. The huff clamp is rotated to align the heading score of the transducer array 41 with the score on the gate valve 6. The tightness of the sealing flange 8 is checked again. And (5) installing and fastening the half splint. And finally, inserting a cable plug, finishing the installation, and checking the installation condition of each part again to finish the installation of the acoustic log. After the installation, the radiation surface of the device is carefully protected, no scratch or galling occurs, the painting and grease are prohibited, a hard cover is added on the outside for protection, and a warning sign is hung.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (5)
1. A method for mounting an acoustic log, comprising the steps of:
A. introducing the corrected center line of the ship body into an installation cabin, marking a straight line perpendicular to a fore-aft marker line at the installation rib position, and marking a base installation center on the cabin ground;
B. aligning the center of the base (3) with the marked mounting center of the base, aligning the fore-aft line of the base (3) with the fore-aft marking line on the cabin ground, and then welding the base (3) on the cabin ground;
C. checking the installation quality of the base (3) and ensuring that the installation direction of the base (3) meets the precision requirement;
D. and placing the acoustic log in the base (3) to finish the sealed installation of the acoustic log.
2. The mounting method according to claim 1, wherein in step B, three temporary fixing frames are welded at the bottom of the bottom board hole, and the base (3) is placed on the temporary fixing frames to ensure that the lower plane of the base (3) is well attached to the bottom board hole.
3. The mounting method according to claim 1, wherein in step B, in order to avoid the influence of forward bubbles, the mounting base (3) is selected to be at the bottom of the U-shaped vessel, so as to ensure that the planar radiation surface of the subsequent transducer array (41) is completely co-shaped with the bottom of the vessel; if the ship is unconditionally completely conformal with the ship bottom, the diversion cover (2) needs to be welded on the ship outer plate (1).
4. Installation method according to claim 1, characterized in that in step C the level of the base (3) is detected with a total station.
5. The mounting method according to claim 1, characterized in that in step D, a gate valve (6) is used to assist in sealing the acoustic odometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411783.4A CN112455624A (en) | 2020-12-03 | 2020-12-03 | Mounting method of acoustic log |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411783.4A CN112455624A (en) | 2020-12-03 | 2020-12-03 | Mounting method of acoustic log |
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| CN112455624A true CN112455624A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011411783.4A Pending CN112455624A (en) | 2020-12-03 | 2020-12-03 | Mounting method of acoustic log |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114275114A (en) * | 2022-01-04 | 2022-04-05 | 江南造船(集团)有限责任公司 | Ship bottom bubble detection method and bubble layer monitor |
| CN114524063A (en) * | 2022-03-04 | 2022-05-24 | 江南造船(集团)有限责任公司 | Method for replacing marine water gate set and ship |
| CN114750896A (en) * | 2022-04-21 | 2022-07-15 | 江南造船(集团)有限责任公司 | Restoring method of Doppler transducer |
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| CN109939912A (en) * | 2019-02-13 | 2019-06-28 | 中国舰船研究设计中心 | A kind of acoustic equipment energy converter protective device |
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2020
- 2020-12-03 CN CN202011411783.4A patent/CN112455624A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209667330U (en) * | 2018-01-19 | 2019-11-22 | 英辉南方造船（广州番禺）有限公司 | The new mounting structure of one kind of marine depth sounder energy converter |
| CN108974250A (en) * | 2018-06-15 | 2018-12-11 | 沪东中华造船(集团)有限公司 | A method of location and installation precision of the control special equipment pedestal on block |
| CN109939912A (en) * | 2019-02-13 | 2019-06-28 | 中国舰船研究设计中心 | A kind of acoustic equipment energy converter protective device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114275114A (en) * | 2022-01-04 | 2022-04-05 | 江南造船(集团)有限责任公司 | Ship bottom bubble detection method and bubble layer monitor |
| CN114275114B (en) * | 2022-01-04 | 2023-03-14 | 江南造船(集团)有限责任公司 | Ship bottom bubble detection method and bubble layer monitor |
| CN114524063A (en) * | 2022-03-04 | 2022-05-24 | 江南造船(集团)有限责任公司 | Method for replacing marine water gate set and ship |
| CN114524063B (en) * | 2022-03-04 | 2023-02-17 | 江南造船(集团)有限责任公司 | Method for replacing marine water gate set and ship |
| CN114750896A (en) * | 2022-04-21 | 2022-07-15 | 江南造船(集团)有限责任公司 | Restoring method of Doppler transducer |
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Application publication date: 20210309 |