阅读说明：本技术 一种船舶补偿吊机精度测试方法 (Ship compensation crane precision testing method ) 是由 段谟簿 万超 窦上明 郑登勇 于 2019-10-10 设计创作，主要内容包括：本发明涉及补偿吊机精度检测技术领域,特别是涉及一种船舶补偿吊机精度测试方法。包括以下步骤：S1：在待吊运的下水设备上固定一个连接件,连接件上设置有导向孔；S2：将测量绳穿入导向孔中,测量绳的一端连接有配重,另一端连接有悬浮物；S3：选定海域并通过补偿吊机将下水设备吊运至水下测试深度位置；S4：通过水下监测设备监测导向孔和测量绳的相对位移量、测量绳的变形量,以实现对补偿吊机补偿精度的验证。本发明的测试方法操作简单便捷,成本低廉,并且使得补偿精度的验证直观化,大大降低了检测验证的难度。(The invention relates to the technical field of precision detection of compensation cranes, in particular to a precision testing method of a ship compensation crane. The method comprises the following steps: s1: a connecting piece is fixed on the launching equipment to be hoisted, and a guide hole is formed in the connecting piece; s2: penetrating a measuring rope into the guide hole, wherein one end of the measuring rope is connected with a balance weight, and the other end of the measuring rope is connected with a suspended matter; s3: selecting a sea area and hoisting the underwater equipment to an underwater test depth position through a compensation crane; s4: the relative displacement of the guide hole and the measuring rope and the deformation of the measuring rope are monitored through underwater monitoring equipment, so that the compensation precision of the compensation crane is verified. The test method provided by the invention is simple and convenient to operate and low in cost, enables the verification of the compensation precision to be visualized, and greatly reduces the difficulty of detection and verification.)

1. A ship compensation crane precision testing method is characterized by comprising the following steps:

s1: a connecting piece (4) is fixed on the launching equipment (2) to be hoisted, and a guide hole is formed in the connecting piece (4);

s2: penetrating a measuring rope (6) into the guide hole, wherein one end of the measuring rope (6) is connected with a balance weight (8), and the other end of the measuring rope is connected with a suspended matter (7);

s3: selecting a sea area and hoisting the underwater equipment (2) to an underwater test depth position through a compensation crane;

s4: the relative displacement of the guide hole and the measuring rope (6) and the deformation of the measuring rope (6) are monitored through underwater monitoring equipment (9), so that the verification of the compensation precision of the compensation crane is realized.

2. The accuracy testing method of the ship compensation crane according to claim 1, characterized in that: the step S1 also includes fixing a first light reflecting layer on the connecting piece (4).

3. The accuracy testing method of the ship compensation crane according to claim 2, characterized in that: in step S2, a second reflective layer is fixed to the measuring string (6).

4. The accuracy testing method of the ship compensation crane according to claim 3, characterized in that: the first light reflecting layer and the second light reflecting layer respectively comprise at least two colors which change at intervals.

5. The accuracy testing method of the ship compensation crane according to claim 1, characterized in that: the end part of the connecting piece (4) is provided with an annular structure (5), and an inner hole of the annular structure (5) forms the guide hole.

6. The accuracy testing method of the ship compensation crane according to claim 5, characterized in that: the annular structure (5) is annular, and the diameter of an inner hole of the annular structure (5) is 60-150 mm.

7. The accuracy testing method of the ship compensation crane according to claim 1, characterized in that: in step S3, the sea wave height of the selected sea area is above 2.5m and the water depth is above 500 m.

8. The accuracy testing method of the ship compensation crane according to claim 1, characterized in that: the weight of the counterweight (8) is 30 kg-70 kg, the suspended matter (7) is a floating ball, and the diameter of the floating ball is 300 mm-700 mm.

9. The accuracy testing method of the ship compensation crane according to claim 1, characterized in that: the guide holes extend up and down along the vertical direction.

10. The accuracy testing method of the ship compensation crane according to claim 1, characterized in that: in step S3, the method further includes connecting the launching device (2) to a hook (1) of the compensation crane through a wire rope (3).

Technical Field

The invention relates to the technical field of precision detection of compensation cranes, in particular to a precision testing method of a ship compensation crane.

Background

70% of the earth's surface is covered by oceans, and since the oceans have mysterious colors and contain various rich resources such as water resources, biological resources, mineral resources and the like, humans have never been exploring the oceans from ancient times to present. Ocean exploration requires the assistance of specialized exploration equipment including submersibles, engineering vessels, etc., which primarily hoist underwater equipment and the like to corresponding underwater locations via compensating cranes. Due to the complexity of sea surface operation, the engineering ship is easy to shake violently during hoisting operation, the compensation crane can automatically detect the movement direction and speed of the ship body, and offset the displacement of the ship body through the combined action of retracting the mooring rope and moving the suspension arm, so that the operation movement error of hoisting heavy objects in water is kept within a corresponding threshold range. In order to meet the requirement of the operation movement error, the compensation crane on the engineering ship must have good strain performance and compensation precision, but in the actual use process, due to the particularity of underwater operation, workers cannot accurately know the compensation precision of the compensation crane, so that the verification of the compensation precision becomes a problem which needs to be solved urgently.

Disclosure of Invention

The invention aims to provide a method for testing the precision of a ship compensation crane, which is used for solving the technical problem that the compensation precision of the compensation crane in the prior art cannot be accurately verified.

In order to achieve the purpose, the invention provides a method for testing the precision of a ship compensation crane, which adopts the following technical scheme:

the method for testing the precision of the ship compensation crane comprises the following steps:

s1: a connecting piece is fixed on the launching equipment to be hoisted, and a guide hole is formed in the connecting piece;

s2: penetrating a measuring rope into the guide hole, wherein one end of the measuring rope is connected with a balance weight, and the other end of the measuring rope is connected with a suspended matter;

s3: selecting a sea area and hoisting the underwater equipment to an underwater test depth position through a compensation crane;

s4: the relative displacement of the guide hole and the measuring rope and the deformation of the measuring rope are monitored through underwater monitoring equipment, so that the compensation precision of the compensation crane is verified.

Further, step S1 includes fixing a first light reflecting layer on the connecting member.

Further, step S2 includes fixing a second reflective layer on the measuring string.

Further, the first light reflecting layer and the second light reflecting layer respectively comprise at least two colors which change at intervals.

Furthermore, the end part of the connecting piece is provided with an annular structure, and an inner hole of the annular structure forms the guide hole.

Furthermore, the annular structure is annular, and the diameter of an inner hole of the annular structure is 60 mm-150 mm.

Further, in step S3, the wave height of the selected sea area is above 2.5m and the water depth is above 500 m.

Further, the weight of the counterweight is 30 kg-70 kg, the suspended matter is a floating ball, and the diameter of the floating ball is 300 mm-700 mm.

Further, the guide holes are arranged to extend vertically.

Further, in step S3, the method further includes connecting the launching device to a hook of the compensation crane through a wire rope.

Compared with the prior art, the ship compensation crane precision testing method provided by the embodiment of the invention has the beneficial effects that: the underwater equipment is connected with the compensation crane through the mooring rope, so that when a ship body shakes violently, the underwater equipment moves inevitably, when the underwater equipment moves, the connecting piece fixed on the underwater equipment moves synchronously, and at the moment, the guide hole on the connecting piece and the measuring rope slide up and down relatively along with the lifting of the ship body; along with the swing of hull, the guiding hole still can be to measuring rope one side removal, measuring rope can take place to buckle this moment, then observe the upper and lower relative slippage of guiding hole and measurement through monitoring facilities under water, the degree of buckling of observing the measuring rope can carry out audio-visual judgement to the compensation precision of compensation loop wheel machine, thereby made things convenient for the verification to the compensation precision, if the upper and lower relative slippage who observes, the degree of buckling is great, then explain the compensation precision of compensation loop wheel machine relatively poor, need make the debugging to the compensation loop wheel machine this moment and just can ensure that equipment of launching is in relatively stable position when the operation. The test method provided by the invention is simple and convenient to operate and low in cost, enables the verification of the compensation precision to be visualized, and greatly reduces the difficulty of detection and verification.

Drawings

FIG. 1 is a schematic diagram of a testing process of a precision testing method of a ship compensation crane according to an embodiment of the invention;

FIG. 2 is a schematic view of the structure of the launching device of FIG. 1;

fig. 3 is a schematic view of the measuring line structure of fig. 1.

In the figure, 1-a lifting hook, 2-a launching device, 3-a steel wire rope, 4-a connecting piece, 5-a ring structure, 6-a measuring rope, 7-a suspended matter, 8-a counterweight and 9-an underwater monitoring device.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1 to 3, a method for testing the precision of a ship compensation crane (hereinafter referred to as a test method) according to a preferred embodiment of the present invention is provided. The test method comprises the following steps:

s1: a connecting piece 4 is fixed on the launching equipment 2 to be hoisted, and a guide hole is formed in the connecting piece 4.

Specifically, the launching device 2 in this embodiment is a cage, the cage is in a frame shape, the cage is made of steel, and the weight of the cage is 400 t. In the embodiment, the connecting piece 4 is a connecting rod, the connecting rod is made of steel, the length of the connecting rod is 2m, the diameter of the connecting rod is 34mm, one end of the connecting rod is welded and fixed on the suspension cage, and in other embodiments, the connecting rod can also be fixed on the suspension cage in a detachable connection mode such as threaded connection, plug-in card fixation and the like; the other end welded fastening of connecting rod has an annular structure 5, and annular structure 5 is the ring form in this embodiment, and annular structure 5 specifically adopts the round steel material bending type that the diameter is 20 mm. Because the surface of the annular structure 5 formed by bending the round steel material is a curved surface, the abrasion of the annular structure 5 and the measuring rope 6 (described later) can be reduced, and the service lives of the measuring rope 6 and the annular structure 5 are prolonged. The inner bore of the ring structure 5 constitutes the guide bore in this embodiment. The diameter of the guide hole is 100mm in the embodiment, and the diameter of the guide hole can be any value between 60mm and 150mm in other embodiments, such as 60mm, 70mm, 80mm, 110mm, 120mm, 150mm, and the like.

In order to keep the verticality of the measuring rope 6, the extending direction of the guide hole needs to be kept vertical in the using process, and in order to realize the using requirement, the connecting rod in the embodiment is vertically arranged on the side surface of the suspension cage, and the plane of the annular structure 5 is parallel to the top surface of the suspension cage. Like this through adjustment cage top surface be in the level can adjust annular structure 5 to the level to realized that the guiding hole is in the vertically setting all the time.

In order to facilitate the underwater monitoring device 9 (described later) to find the connecting member 4, step S1 of the present embodiment further includes the step of fixing a first light reflective layer on the connecting member 4. Specifically, in this embodiment, the first reflective layer is a reflective tape with red and white spaces, the reflective tape is pasted along the extending direction of the connecting member 4, and the red and white stripes on the reflective tape also sequentially and alternately change along the extending direction of the connecting member 4.

S2: the measuring rope 6 penetrates into the guide hole, one end of the measuring rope 6 is connected with a balance weight 8, and the other end of the measuring rope is connected with a suspended matter 7.

Specifically, in this embodiment, the measuring rope 6 is a hemp rope, one end of the hemp rope is fixedly connected with the suspension 7, and the other end of the hemp rope is connected with the counterweight 8, in this embodiment, the suspension 7 is a floating ball, the diameter of the floating ball is 500mm, and in other embodiments, the diameter of the floating ball may be any value between 300mm and 700mm, such as 300mm, 400mm, 600mm, 700mm, and the like. The suspension 7 is arranged to suspend the measuring rope 6 and the counterweight 8 in the sea water, and the counterweight 8 is arranged to provide a downward acting force to the measuring rope 6, in this embodiment, the counterweight 8 is a lead block, the weight of the counterweight 8 is 50kg, and in other embodiments, the weight of the counterweight 8 may be any value between 30kg and 70kg, for example, 30kg, 40kg, 60kg, or 70 kg. When the measuring rope 6 is put into seawater, the measuring rope 6 is kept in a vertical state under the tension of the balance weight 8 and the suspended matters 7. It should be noted that in the present embodiment, the lead block and/or the suspension 7 is detachably connected to the measuring cord 6, and when the measuring cord 6 needs to be inserted into the guide hole, the lead block or the suspension 7 on one side is detached.

In order to facilitate the underwater monitoring device 9 to observe the measuring rope 6, step S2 in this embodiment further includes fixing a second reflective layer on the measuring rope 6, where the second reflective layer is also a reflective tape with alternate red and white colors in this embodiment, the reflective tape is adhered along the extending direction of the measuring rope 6, and the red and white stripes on the reflective tape also sequentially and alternately change along the extending direction of the measuring rope 6. The relative movement of the ring-like structure 5 is thus reflected by the alternating black and white stripes, which facilitates monitoring.

S3: and selecting a sea area and hoisting the underwater equipment 2 to an underwater test depth position through the compensation crane.

Specifically, the wave height of the sea wave in the selected sea area is more than 2.5m, and the water depth is more than 500 m. After the engineering ship runs to a selected sea area, the suspension cage is suspended to a proper underwater test depth position through the compensation crane, and it should be noted that in this embodiment, before the suspension cage is suspended in the sea water, the method further includes a step of fixing the suspension cage and a lifting hook 1 of the compensation crane together through a steel wire rope 3, specifically, in this embodiment, four corner positions of the top surface of the suspension cage are all connected with one steel wire rope 3, top ends of the four steel wire ropes 3 are all fixedly connected with the lifting hook 1, the overall shape of the four steel wire ropes 3 is a quadrangular pyramid shape, and in this embodiment, the lifting hook 1 is connected with the compensation crane through a cable. The top surface of the suspension cage can be kept horizontal by adopting the connection mode of the steel wire rope 3, so that the connecting piece 4 and the annular structure 5 are kept horizontal, and the verticality of the measuring rope 6 is guaranteed. After the suspension cage is lowered to the underwater test depth position, the overall position relationship of the suspension cage, the connecting piece 4, the measuring rope 6, the balance weight 8 and the suspended matters 7 is shown in figure 1.

S4: the relative displacement of the guide hole and the measuring rope 6 and the deformation of the measuring rope 6 are monitored through the underwater monitoring equipment 9, so that the compensation precision of the compensation crane is verified.

Specifically, in this step, the underwater monitoring device 9 needs to be moved to a position close to the annular structure 5, in this embodiment, the underwater monitoring device 9 is an underwater robot ROV, the underwater monitoring device 9 can transmit an underwater view to a corresponding display device in real time, and a worker can observe an underwater situation by looking at an image on the display device. In order to facilitate the underwater monitoring device 9 to quickly find the annular structure 5, in this embodiment, the underwater monitoring device 9 submerges along the measuring rope 6, when the connecting member 4 intersecting with the measuring rope 6 is observed from the underwater monitoring device 9, the annular structure 5 can be found, and then the underwater monitoring device 9 is stopped at a position corresponding to the annular structure 5, preferably, the view of the underwater monitoring device 9 can completely monitor the annular structure 5.

Because the effect of wave in the monitoring process, engineering ship can take place acutely to rock, when the hull takes place acutely to rock, the compensation loop wheel machine can monitor rocking of hull and offset the hull through the mode of flexible hawser or transferring the davit and rock the produced displacement volume, because the compensation effect of compensation loop wheel machine, the displacement volume of the hawser of the equipment of launching 2 that suspends in midair can greatly reduced to the stability in 2 positions of the equipment of launching has been guaranteed. In addition, because the compensation crane cannot completely offset the displacement generated by the ship body shaking, the mooring rope of the compensation crane still shakes to drive the suspension cage to shake, at the moment, because the measurement rope 6 and the suspension cage are relatively independent, the measurement rope 6, the suspended matters 7 and the counterweight 8 cannot generate large displacement under the action of inertia, so that when the suspension cage generates up-and-down settlement, the annular structure 5 can generate up-and-down relative displacement along the measurement rope 6, at the moment, the underwater monitoring equipment 9 can judge the height of the compensation precision by observing the relative displacement of the red and white stripes on the annular structure 5 and the measurement rope 6, if the up-and-down relative displacement between the annular structure 5 and the measurement rope 6 is large, the compensation precision of the compensation crane is low, the underwater equipment 2 still has the condition of large position change under the compensation action of the compensation crane, and if the up-and-down relative displacement between the annular structure 5 and the measurement rope 6 is small, the compensation crane has better compensation precision. In addition, when the suspension cage generates transverse displacement, the annular structure 5 can pull the measuring rope 6 to one side, the suspended matters 7 and the balance weight 8 at the two ends of the measuring rope 6 cannot be displaced immediately due to the inertia effect, at the moment, the measuring rope 6 is bent at the annular structure 5, the degree of bending of the measuring rope 6 can be observed through the underwater monitoring equipment 9, the compensation precision can be judged, if the bending angle of the measuring rope 6 is larger, the suspension cage generates larger displacement, and the compensation precision of the compensation crane is poorer; if the bending angle of the measuring rope 6 is smaller, the horizontal displacement of the suspension cage is smaller, and the compensation precision of the compensation crane is better. It should be noted that, in the actual verification process, the up-down relative displacement of the annular structure 5 and the measuring rope 6 and the bending degree of the measuring rope 6 are often generated simultaneously, and the worker needs to observe the up-down relative displacement and the bending degree of the measuring rope 6 at the same time to make an accurate judgment.

In summary, the embodiment of the invention provides a method for testing the precision of a ship compensation crane, which is simple and convenient to operate and low in cost, enables the verification of the compensation precision to be visualized, and greatly reduces the difficulty of detection and verification.

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.