CN112555234B - Automatic pressure regulating system for regulating oil leakage pressure of underwater operation equipment - Google Patents
Automatic pressure regulating system for regulating oil leakage pressure of underwater operation equipment Download PDFInfo
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- CN112555234B CN112555234B CN201910850448.5A CN201910850448A CN112555234B CN 112555234 B CN112555234 B CN 112555234B CN 201910850448 A CN201910850448 A CN 201910850448A CN 112555234 B CN112555234 B CN 112555234B
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- oil
- leakage oil
- oil tank
- leakage
- hydraulic pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/006—Compensation or avoidance of ambient pressure variation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides an automatic pressure regulating system for regulating the leakage oil pressure of underwater operation equipment, wherein the underwater operation equipment comprises a hydraulic system, and the automatic pressure regulating system comprises: the driving mechanism is provided with a leakage oil port; the leakage oil tank is respectively connected with the hydraulic system and the leakage oil port; the hydraulic pump is connected with the driving mechanism and is provided with an oil suction port and an output port, and the oil suction port is communicated with the leakage oil tank; a controller; the controller is respectively connected with the leakage oil tank and the driving mechanism, and can receive the capacity change signal of leakage oil in the leakage oil tank in real time, regulate and control the rotating speed of the driving mechanism according to the received signal so as to drive the hydraulic pump to absorb the leakage oil in the leakage oil tank through the oil suction port and convey the leakage oil into the liquid level oil tank through the output port, thereby regulating the leakage oil pressure of the underwater operation equipment.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems, and particularly relates to an automatic pressure regulating system for regulating the leakage oil pressure of underwater operation equipment.
Background
Hydraulic system components, such as hydraulic control valves, hydraulic motors, etc., may be operated to produce internal leakage of oil. During application of the hydraulic system, the leakage port is typically connected to the tank so that the internal relief pressure is maintained within a limited pressure value to ensure proper operation of the hydraulic components and system. However, in some underwater working occasions, such as when a hydraulic power system supplies power to underwater working equipment from the water surface, because a certain height difference exists in the water depth and the pipeline is long, the internal oil drainage pressure cannot be kept consistent with the pressure of the water surface oil tank, and the pressure cannot be kept within the limit pressure. Therefore, the oil drainage pressure of the hydraulic system cannot be automatically regulated, the normal operation of underwater operation equipment is seriously affected, and the efficiency of underwater operation is reduced.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide an automatic pressure regulating system for regulating the leakage oil pressure of underwater operation equipment, which can absorb the internal leakage oil of a hydraulic system operating under water to a water surface oil tank, and can automatically regulate the oil discharge amount according to the actual measurement value of the internal leakage oil pressure so as to keep the leakage oil pressure at a set value, thereby effectively avoiding the occurrence of faults of underwater hydraulic components and systems due to the excessive internal leakage oil pressure.
To this end, according to the present invention, an automatic pressure regulating system for regulating the leak pressure of an underwater work apparatus is presented, the underwater work apparatus comprising a hydraulic system, the automatic pressure regulating system comprising: the driving mechanism is provided with a leakage oil port; the leakage oil tank is used for collecting leakage oil and is respectively connected with the hydraulic system and the leakage oil port; the hydraulic pump is connected with the driving mechanism and is provided with an oil suction port and an output port, the oil suction port is communicated with the leakage oil tank, and the output port is communicated with a liquid level oil tank on the water surface; and a controller for adjusting and controlling the rotational speed of the driving mechanism; the controller is respectively connected with the leakage oil tank and the driving mechanism, and can receive a capacity change signal of leakage oil in the leakage oil tank in real time, regulate and control the rotating speed of the driving mechanism according to the received signal so as to drive the hydraulic pump to absorb the leakage oil in the leakage oil tank through the oil suction port and convey the leakage oil into the liquid level oil tank through the output port, thereby regulating the leakage oil pressure of underwater operation equipment.
In a preferred embodiment, a displacement sensor for measuring the volume of leaked oil in the leaked oil tank is provided in the leaked oil tank.
In a preferred embodiment, the displacement sensor is connected to the controller, and the controller is capable of receiving a measurement signal from the displacement sensor and sending a control signal to control and adjust the rotation speed of the driving mechanism, thereby adjusting the flow rate of the output port of the hydraulic pump.
In a preferred embodiment, the drive mechanism is a hydraulic motor or an electric machine.
In a preferred embodiment, the driving mechanism is connected with the hydraulic pump through a coupler, a coupler housing is arranged outside the coupler, and the driving mechanism and the hydraulic pump are fixedly connected with the coupler housing.
In a preferred embodiment, the coupling housing is filled with hydraulic oil, and the automatic pressure regulating system further comprises a pressure compensator connected to a pressure compensator interface provided at the bottom of the coupling housing.
In a preferred embodiment, the drive mechanism and the hydraulic pump are relatively fixedly mounted to the coupling housing.
In a preferred embodiment, a first sealing ring and a second sealing ring are arranged between the coupling housing and the drive mechanism and the hydraulic pump, respectively.
In a preferred embodiment, the oil suction port communicates with the leakage oil tank through an oil pipe, and the output port communicates with the liquid level oil tank through an oil pipe.
In a preferred embodiment, the oil suction port and the output port are oppositely disposed on the housing of the hydraulic pump.
Compared with the prior art, the automatic pressure regulating system for regulating the leakage oil pressure of the underwater operation equipment has the advantages that:
according to the automatic pressure regulating system for regulating the pressure of leaked oil of the underwater operation equipment, the pressure of leaked oil of the underwater operation equipment is regulated by adopting a driving mechanism to drive a hydraulic pump through a coupling. The automatic pressure regulating system can convey the leaked oil of the hydraulic system of the underwater operation equipment which is in underwater operation to the liquid level oil tank which is in the water surface so as to regulate the pressure of the leaked oil of the underwater operation equipment, thereby effectively avoiding the influence on normal operation caused by overlarge pressure of the leaked oil of the underwater operation equipment. The automatic pressure regulating system can measure the volume change of the leaked oil in the leaked oil tank in real time through the displacement sensor, and timely sends a measuring signal to the controller, and further, the rotation speed of the driving mechanism is automatically regulated and controlled through the controller, so that the output flow of leaked oil is automatically regulated, the regulation precision of the oil leakage pressure of the underwater operation equipment is obviously enhanced, and the normal operation of the underwater operation equipment is effectively ensured.
Drawings
The present invention will be described below with reference to the accompanying drawings.
Fig. 1 schematically shows the structure of an automatic pressure regulating system for regulating the leakage oil pressure of underwater operation equipment according to the present invention.
Fig. 2 is a front view showing the external structure of a driving mechanism and a hydraulic pump in the automatic pressure regulating system shown in fig. 1.
Fig. 3 is a perspective view showing the external structure of the driving mechanism and the hydraulic pump shown in fig. 1.
Fig. 4 is a cross-sectional view of a connection structure of the driving mechanism and the hydraulic pump shown in fig. 1.
In this application, all of the figures are schematic drawings which are intended to illustrate the principles of the invention and are not to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
Fig. 1 schematically shows the structure of an automatic pressure regulating system for regulating the leakage oil pressure of underwater operation equipment according to the present invention. Wherein subsea operating device 200 includes a hydraulic system 210. During operation, the hydraulic system 210 may generate leaked oil, and the automatic pressure regulating system may be configured to automatically regulate the pressure of the leaked oil of the hydraulic system 210.
As shown in fig. 1, the automatic pressure regulating system includes a driving mechanism 110 and a hydraulic pump 120, and the driving mechanism 110 may be a hydraulic motor or an electric machine. The drive mechanism 110 and the hydraulic pump 120 are connected by a coupling 130. The automatic pressure regulating system regulates the pressure of the leaked oil of the hydraulic system 210 of the underwater operation equipment 200 in a manner that the driving mechanism 110 drives the hydraulic pump 120 through the coupling 130, thereby preventing the damage of the driving mechanism 110 due to the excessive pressure of the housing of the underwater driving mechanism 110.
As shown in fig. 2, a first control port 111 and a second control port 112 of a housing of the driving mechanism 110. The first control port 111 and the second control port (not shown) are oppositely provided on the housing of the drive mechanism 110. And, the driving mechanism 110 is provided with a leakage oil port (not shown) for discharging the leaked oil. The first control port 111 and the second control port are configured to control rotation of the drive mechanism 110. The first control port 111 and the second control port are respectively connected with a hydraulic oil pipe (not shown), and control valves are respectively provided on the hydraulic oil pipes. During the operation, the control valve controls the injection flow rate and the discharge flow rate of the hydraulic oil from the first control port 111 and the second control port, thereby controlling the rotation of the driving mechanism 110 to perform the driving operation. This control manner of the driving mechanism 110 can effectively ensure control accuracy, thereby improving work efficiency and enhancing work effect.
According to the present invention, the automatic pressure regulating system further includes a leakage oil tank 140 for collecting leaked oil, and the leakage oil tank 140 is connected to the leakage oil ports of the hydraulic system 210 and the driving mechanism 110, respectively. The leakage oil tank 140 is made of an elastic material, and can be adaptively stretched according to the volume of oil in the leakage oil tank 140. For example, the oil pressure inside the leakage oil tank 140 increases when the oil volume increases, so that the volume of the leakage oil tank 140 increases. The oil pressure inside the leakage oil tank 140 increases when the volume of the leakage oil decreases, so that the volume of the leakage oil tank 140 increases. In one embodiment, a displacement sensor 141 is provided in the leakage oil tank 140, and the displacement sensor 141 is used to measure the volume change of the leaked oil in the leakage oil tank 140 in real time.
As shown in fig. 2 and 3, an oil suction port 121 is provided in a housing of the hydraulic pump 120. The oil suction port 121 communicates with the leakage oil tank 140 through an oil pipe for sucking leaked oil in the leakage oil tank 140. In one embodiment, the oil suction port 121 communicates with the leakage oil tank 140 through a hydraulic hose. The casing of the hydraulic pump 120 is also provided with an output port 122, and the output port 122 is disposed opposite to the oil suction port 121. The output port 122 is capable of withstanding high hydraulic pressures, and the output port 122 communicates with a liquid level tank 202 in a hydraulic power unit 202 provided on a surface vessel 203 through an output oil pipe. Thereby, the automatic pressure regulating system sucks the leaked oil in the leaked oil tank 140 through the oil suction port 121 and conveys the leaked oil to the liquid level oil tank 202 on the water surface through the output port 122, thereby realizing the regulation of the pressure of the leaked oil of the underwater operation equipment.
According to the present invention, the coupling 130 is connected between the driving mechanism 110 and the hydraulic pump 120, and the driving mechanism 110 drives the hydraulic pump 120 through the coupling 130 so that the oil suction port 121 sucks the leaked oil in the leaked oil tank 140, and then the leaked oil is transferred to the liquid level oil tank 202 on the water surface through the output port 122, thereby adjusting the pressure of the leaked oil of the underwater operation equipment.
As shown in fig. 2 and 3, the coupling 130 includes a coupling housing 131, and the coupling housing 131 is configured as a rectangular cube. Both ends of the coupling 130 are respectively connected to the driving mechanism 110 and the hydraulic pump 120, and the housings of the driving mechanism 110 and the hydraulic pump 120 are respectively fixedly connected to opposite side walls of the coupling housing 131. In one embodiment, the housings of the drive mechanism 110 and the hydraulic pump 120 are fixedly connected to the coupling housing 131 by screws, respectively. The coupling housing 131 can effectively protect the coupling 130 and effectively prevent the coupling 130 from being damaged by direct contact of the coupling 130 with external water.
In order to ensure the tightness between the coupling housing 131 and the driving mechanism 110 and the hydraulic pump 120, a first seal ring 115 is provided at the junction of the coupling housing 131 and the housing of the driving mechanism 110, and a second seal ring 125 is provided at the junction of the coupling housing 131 and the housing of the hydraulic pump 120, as shown in fig. 4. The first seal ring 115 and the second seal ring 125 can effectively ensure the tightness of the joint between the coupling housing 131 and the driving mechanism 110 and the hydraulic pump 120, so as to effectively seal the coupling housing 131, thereby protecting the coupling 130.
According to the invention, the automatic pressure regulating system further comprises a pressure compensator (not shown). A pressure compensator interface 133 is provided at the bottom of the coupling housing 131, and the coupling housing 131 is filled with hydraulic oil. The pressure compensator communicates with the internal cavity of the coupling housing 131 through a pressure compensator interface 133 for regulating the oil pressure to balance the oil pressure within the coupling housing 131 with the external water pressure. Therefore, the strength and sealing requirements of the coupling housing 131 can be reduced, the automatic pressure regulating system can be applied to pressures of different water depths, and the applicability of the automatic pressure regulating system is enhanced.
As shown in fig. 4, an oil inlet is provided at an upper end of the coupling housing 131, and a plug 134 is provided in the oil inlet. The oil inlet is used for injecting hydraulic oil into the coupling housing 131, and the plug 134 is used for closing the oil inlet to ensure the sealing of the coupling housing 131.
According to the present invention, the automatic pressure regulating system further comprises a controller 150 for regulating and controlling the rotational speed of the driving mechanism 110. The controller 150 is connected to the leakage oil tank 140 and the driving mechanism 110, and the controller 140 can receive the capacity information of the leakage oil in the leakage oil tank 140 measured by the displacement sensor 141 in real time and send a control signal to the driving mechanism 110 to control the rotation speed of the driving mechanism 110, so as to adjust the flow of the leakage oil output by the hydraulic pump 120, and realize automatic adjustment of the pressure of the leakage oil in the leakage oil tank 140.
The operation of the automatic pressure regulating system for regulating the leakage oil pressure of underwater operation equipment according to the present invention will be briefly described. During subsea operation of subsea operating device 200, oil in hydraulic system 210 may leak into leaking oil tank 140, causing the leaking oil pressure of subsea operating device 200 to gradually increase. At this time, the displacement sensor 141 in the leakage oil tank 140 detects a capacity change of the leaked oil in the leakage oil tank 140 in real time, and transmits measured information to the controller 150 in time. The controller 150 receives the signal from the displacement sensor 140, automatically adjusts the rotation speed of the driving mechanism 110, controls the hydraulic pump 120 to suck the leaked oil in the leaked oil tank 140 through the oil suction port 121, and automatically adjusts the output flow of the output port 122 of the hydraulic pump 120, so that the pressure release oil in the leaked oil tank 140 is conveyed to a liquid level oil tank on the water surface through the output port 122. Thereby, the automatic adjustment of the pressure-releasing oil of the underwater operation device 200 is completed.
An automatic pressure regulating system for regulating the pressure of leaked oil of underwater operation equipment according to the present invention regulates the pressure of leaked oil of underwater operation equipment 200 in such a manner that a driving mechanism 110 drives a hydraulic pump 120 through a coupling 130. The automatic pressure regulating system can convey the leaked oil of the hydraulic system of the underwater operation equipment 200 to the liquid level oil tank 202 positioned on the water surface so as to regulate the pressure of the leaked oil of the underwater operation equipment 200, thereby effectively avoiding the influence on normal operation caused by overlarge pressure of the leaked oil of the underwater operation equipment 200. The automatic pressure regulating system can measure the volume change of the leaked oil in the leaked oil tank 140 in real time through the displacement sensor 141, and timely sends a measuring signal to the controller 150, and further automatically adjusts and controls the rotating speed of the driving mechanism 110 through the controller 150, so that the output flow of the leaked oil is automatically regulated, the regulation precision of the oil leakage pressure of the underwater operation equipment is obviously enhanced, and the normal operation of the underwater operation equipment is effectively ensured.
Finally, it should be noted that the above description is only of a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing examples, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An automatic pressure regulating system for regulating the leak oil pressure of an underwater work apparatus, the underwater work apparatus comprising a hydraulic system (210), characterized in that the automatic pressure regulating system comprises:
a driving mechanism (110) provided with a leakage oil port;
the leakage oil tank (140) is used for collecting leakage oil and is respectively connected with the hydraulic system and the leakage oil port, the leakage oil tank is made of elastic materials and can adaptively stretch and retract according to the volume of oil in the leakage oil tank, and a displacement sensor (141) used for measuring the volume of the leakage oil in the leakage oil tank is arranged in the leakage oil tank;
a hydraulic pump (120) connected to the drive mechanism, the hydraulic pump having an oil suction port (121) and an output port (122), the oil suction port being in communication with the leakage oil tank, the output port being in communication with a liquid level oil tank (202) on the water surface; and
a controller (150) for regulating and controlling the rotational speed of the drive mechanism;
the hydraulic pump is characterized in that the driving mechanism is connected with the hydraulic pump through a coupler (130), a coupler shell (131) is arranged outside the coupler, the driving mechanism and the hydraulic pump are fixedly connected with the coupler shell, the controller is respectively connected with the leakage oil tank and the driving mechanism, and can receive a capacity change signal of leakage oil in the leakage oil tank in real time and regulate and control the rotating speed of the driving mechanism according to the received signal so as to drive the hydraulic pump to absorb the leakage oil in the leakage oil tank through the oil suction port and convey the leakage oil to the liquid level oil tank through the output port, thereby regulating the leakage oil pressure of underwater operation equipment.
2. The automatic pressure regulating system of claim 1, wherein the displacement sensor is connected to the controller, and the controller is capable of receiving a measurement signal from the displacement sensor and sending a control signal to control and regulate the rotational speed of the drive mechanism, thereby regulating the flow rate of the output port of the hydraulic pump.
3. The automatic pressure regulating system of claim 1 or 2, wherein the drive mechanism is a hydraulic motor or an electric machine.
4. The automatic pressure regulating system of claim 1, wherein the coupling housing is filled with hydraulic oil, the automatic pressure regulating system further comprising a pressure compensator connected to a pressure compensator interface (133) provided at the bottom of the coupling housing.
5. The automatic pressure regulating system of claim 4, wherein the drive mechanism and the hydraulic pump are relatively fixedly mounted to the coupling housing.
6. The automatic pressure regulating system of claim 4, wherein a first seal ring (115) and a second seal ring (125) are provided between the coupling housing and the drive mechanism and the hydraulic pump, respectively.
7. The automatic pressure regulating system of claim 1, wherein the oil suction port communicates with the leakage oil tank through an oil pipe, and the output port communicates with the liquid level oil tank through an oil pipe.
8. The automatic pressure regulating system of claim 1, wherein the oil suction port and the output port are oppositely disposed on a housing of the hydraulic pump.
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| CN201910850448.5A CN112555234B (en) | 2019-09-10 | 2019-09-10 | Automatic pressure regulating system for regulating oil leakage pressure of underwater operation equipment |
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| CN201910850448.5A CN112555234B (en) | 2019-09-10 | 2019-09-10 | Automatic pressure regulating system for regulating oil leakage pressure of underwater operation equipment |
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| CN112555234B true CN112555234B (en) | 2023-06-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615430A (en) * | 2013-12-05 | 2014-03-05 | 上海交通大学 | ROV hydraulic isolation pump station used for deep sea sampler |
| CN107218258A (en) * | 2017-06-30 | 2017-09-29 | 南京中车浦镇海泰制动设备有限公司 | A kind of urban track traffic use for brake system hydraulic control unit |
| CN107697828A (en) * | 2017-10-20 | 2018-02-16 | 中国人民解放军陆军军事交通学院镇江校区 | A kind of ROV heave compensation systems |
| CN109422204A (en) * | 2017-09-01 | 2019-03-05 | 上海中车艾森迪海洋装备有限公司 | A kind of operation on the sea is with laying recovery system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61105355A (en) * | 1984-10-30 | 1986-05-23 | Nissan Motor Co Ltd | Line pressure regulating valve |
| JP3627338B2 (en) * | 1995-12-30 | 2005-03-09 | アイシン・エィ・ダブリュ株式会社 | Pressure regulating valve in hydraulic control device of automatic transmission |
| JP4395793B2 (en) * | 1997-02-03 | 2010-01-13 | 株式会社デンソー | Hydraulic circuit provided with rotary pump and brake device using this hydraulic circuit |
| CN102288252B (en) * | 2011-05-12 | 2012-11-14 | 温州大学 | System for testing micro leakage of sealed component |
| CN203068142U (en) * | 2012-11-23 | 2013-07-17 | 亚星（镇江）系泊链有限公司 | Hydraulic motor leaked oil recovery device of rotary table chain conveying machine |
| CN103511396B (en) * | 2013-09-03 | 2016-01-20 | 燕山大学 | Based on oil hydraulic pump and the oil hydraulic motor reliability test of power recovery technology |
| CN203907242U (en) * | 2014-05-20 | 2014-10-29 | 黄河 | Underwater oil and gas leakage safety monitoring device |
| CN106762874B (en) * | 2017-03-14 | 2019-04-02 | 徐工集团工程机械有限公司 | Hydraulic motor drainage pressure control device and method |
| CN107014566A (en) * | 2017-03-23 | 2017-08-04 | 中海石油环保服务（天津）有限公司 | A kind of crude oil leakage point detection device under water |
-
2019
- 2019-09-10 CN CN201910850448.5A patent/CN112555234B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615430A (en) * | 2013-12-05 | 2014-03-05 | 上海交通大学 | ROV hydraulic isolation pump station used for deep sea sampler |
| CN107218258A (en) * | 2017-06-30 | 2017-09-29 | 南京中车浦镇海泰制动设备有限公司 | A kind of urban track traffic use for brake system hydraulic control unit |
| CN109422204A (en) * | 2017-09-01 | 2019-03-05 | 上海中车艾森迪海洋装备有限公司 | A kind of operation on the sea is with laying recovery system |
| CN107697828A (en) * | 2017-10-20 | 2018-02-16 | 中国人民解放军陆军军事交通学院镇江校区 | A kind of ROV heave compensation systems |
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