A method of submarine cable fault monitoring

Abstract

The present application relates to the technical field of submarine cable fault monitoring, and particularly relates to a submarine cable fault monitoring method, which comprises a sinking block and a cable rope fixed to the upper end of the sinking block, and a detector body is arranged in the inner cavity of the lower side of the cable rope. The submarine cable fault monitoring method provided by the present application can make the lower end of the lighter elastic metal band on the same side move away from the fixed column when the heavier extension plate moves inward under the impact of seawater, so that the center of gravity of the sinking block on the side close to the water flow impact automatically shifts away from the side of the water flow impact, and the balance is automatically maintained. When the elastic metal band moves, the balance can be maintained by shifting the gas, the load of the ship body is reduced, the transportation cost is reduced, the elastic metal bands on both sides are elastically moved downward, and the amplitude of the downward elastic movement is the same, so that the whole stability can be maintained while the elastic movement drives away the nearby fish.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of submarine cable fault monitoring, in particular to a submarine cable fault monitoring method. BACKGROUND

[0002] The working environment of a submarine cable is complex and harsh, and accidents of submarine cable damage and fracture caused by seabed collapse, local landslide, fishing net dragging and ship anchoring occur from time to time. At present, a method of pre-positioning plus accurate positioning is generally used for submarine cable fault positioning at home and abroad. The main pre-positioning methods include time domain reflection (TDR), Murray Bridge method, secondary pulse method and multi-pulse method.

[0003] At present, domestic devices such as multi-beam and side-scan sonar are used to detect seabed information and the state of submarine cables. In submarine cable detection, a sonar detector usually needs to be lowered into seawater through a rope or a special cable, but these devices usually cannot meet the detection requirements in harsh sea conditions. During detection, the emission direction needs to be kept perpendicular to the cable axis to ensure effective signal reflection, but the water flow will frequently impact the sonar detector. If only the weight is increased, the stability of the sonar detector can be improved, but the sonar detector will still tilt at a certain angle, and adding too much weight will also increase the load of the transport ship and the transportation cost. SUMMARY

[0004] In order to solve the above problems, the application provides a submarine cable fault monitoring method.

[0005] The application adopts the following technical scheme, which uses a submarine cable fault monitoring device, including a sinking block and a cable rope fixed to the upper end of the sinking block, and a detector body is arranged in the inner cavity of the lower side of the cable rope. The specific steps of using the submarine cable fault monitoring device are as follows:

[0006] S1, the whole sinking block is placed into the sea from the ship through the cable rope, and then the cable rope is straightened, so that the bottom end of the sinking block can be vertically located above the submarine cable;

[0007] S2, when the sea water impacts, the heavier extension plate moves inward, the lower end of the elastic metal belt moves away from the fixed column, automatically maintains balance, and the elastic metal belt moves, which can maintain balance by transferring gas;

[0008] S3, when impacted, the elastic metal belts on both sides are bounced downward, and the amplitude of downward bouncing is the same, so that the elastic metal belts bounce and drive the nearby fish, while maintaining the stability of the whole;

[0009] The balance mechanism can automatically change the gravity center position according to the impact of the sea water, and the balance mechanism is arranged in the sinking block.

[0010] The gas moving mechanism can balance the position of the sinking block by changing the position of the gas, and the gas moving mechanism is arranged in the inner cavity of the upper side of the sinking block.

[0011] The driving mechanism is arranged in the sinking block, and is used for automatically driving the fish around.

[0012] As a further description of the above technical scheme: the balancing mechanism includes an extension plate movably inserted into the sinking block, and one end of the extension plate extends to the outside of the sinking block, one end of the extension plate on the inside of the sinking block is fixedly connected with an elastic metal belt, the inner cavity of the upper side of the sinking block is fixedly connected with a fixed sleeve, the elastic metal belt is arranged in the fixed sleeve, and the elastic metal belt is movably arranged in the fixed sleeve in a U shape, a fixed column is fixedly connected at the center of the sinking block, two elastic metal belts are symmetrically arranged about the fixed column, and one end of the elastic metal belt away from the fixed column is provided with a sharp end.

[0013] As a further description of the above technical scheme: the gas moving mechanism includes two fixed sleeves fixedly connected on opposite sides of the fixed column, a gas storage cavity is formed in each fixed sleeve, a lifting plate is slidably arranged on the inner top end of the gas storage cavity, one end of the elastic metal belt abuts against a round roller, a threaded rod is fixedly connected to the upper end center of the round roller, the threaded rod is rotatably arranged in the fixed sleeve, a torsional spring is fixedly connected between the outer wall of the upper end of the fixed sleeve and the fixed sleeve, two partitions are fixedly connected to the outer wall of the threaded rod at the upper end, a pull rope is wound around the outer wall of the threaded rod between the two partitions, the same pull rope is wound around the outer wall of the threaded rod on opposite sides of the fixed column, a threaded connecting rod is threadedly connected to the outer wall of the threaded rod, and the threaded connecting rod is fixedly connected to the lifting plate.

[0014] As a further description of the above technical scheme: the driving mechanism includes a fixed frame fixedly connected to the fixed sleeve, a rotating wheel is rotatably arranged on the fixed frame, a rotating shaft is fixedly connected to the center of the rotating wheel, one end of the rotating shaft extends to the outside of the fixed frame, a trapezoidal extrusion block is rotatably arranged on the outer wall of one end of the rotating shaft on the outside of the fixed frame, an annular groove is formed in the side wall of the trapezoidal extrusion block close to the fixed frame, a blocking block is slidably arranged in the annular groove, the blocking block is fixedly connected to the outer wall of the fixed frame, and an extrusion block is fixedly connected to the upper side of the trapezoidal extrusion block on the elastic metal belt.

[0015] As a further description of the above technical scheme: the two fixed sleeves form a group, and a plurality of groups of fixed sleeves are arranged at equal intervals in a ring shape in the sinking block.

[0016] As a further description of the above technical scheme: the gas storage cavities symmetrically distributed about the fixed column are connected in communication, and the weight of the elastic metal belt is smaller than that of the extension plate.

[0017] As a further description of the above technical scheme: the pulling ropes on the two sides of the threaded rods are wound in opposite directions, the external threads of the two sides of the threaded rods are opposite, and initially, the pulling ropes between the two sides of the threaded rods are in a taut state.

[0018] As a further description of the above technical scheme: the extrusion blocks are equidistantly arranged, and the lengths of the extrusion blocks gradually decrease in the direction away from the tip.

[0019] The present application provides a submarine cable fault monitoring method by improvement, compared with the prior art, has the following improvements and advantages:

[0020] Firstly, when seawater impacts, the heavier extension plate moves inward, and the lower end of the lighter elastic metal band on the same side moves away from the fixed column, which makes the center of gravity of the sinking block on the side close to the water flow impact automatically shift away from the side of the water flow impact, and automatically maintain balance.

[0021] Secondly, when the elastic metal band moves, balance can be maintained by shifting gas, which is more advantageous than the traditional method of simply increasing the weight of the probe body to maintain balance, can reduce the overall weight of the sinking block, and thus reduce the load of the ship body and transportation cost.

[0022] Thirdly, the elastic metal bands on both sides move downward with the same amplitude, thereby maintaining the stability of the whole while driving away nearby fish, and the rotating wheel can reduce friction and automatically change the position of the trapezoidal extrusion block, so that the lower ends of the elastic metal bands on both sides can intermittently move downward.

[0023] In summary, when seawater impacts, the heavier extension plate moves inward, and the lower end of the lighter elastic metal band on the same side moves away from the fixed column, which makes the center of gravity of the sinking block on the side close to the water flow impact automatically shift away from the side of the water flow impact, and automatically maintain balance. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further explained in conjunction with the drawings and examples:

[0025] Figure 1 A structure diagram of a submarine cable fault monitoring device provided by the embodiment of the present application is shown in the figure.

[0026] Figure 2 A perspective view of the sinking block provided for the embodiment of the present application;

[0027] Figure 3 A structural schematic view of the elastic metal belt provided for the embodiment of the present application;

[0028] Figure 4 A structural schematic view of the lifting plate provided for the embodiment of the present application;

[0029] Figure 5 A structural schematic view of the driving mechanism provided for the embodiment of the present application;

[0030] Figure 6 A structural schematic view of the annular groove provided for the embodiment of the present application;

[0031] Figure 7 A Figure 3 enlarged view of A in FIG. 1;

[0032] Figure 8 A Figure 4 enlarged view of B in FIG. 1.

[0033] In the figure: 1, sinking block; 2, cable; 3, balancing mechanism; 31, extension plate; 32, elastic metal belt; 33, sharp end; 4, detector body; 5, gas moving mechanism; 51, fixed sleeve; 52, lifting plate; 53, gas storage cavity; 54, round roller; 55, threaded rod; 56, threaded connecting rod; 57, torsional spring; 58, partition plate; 59, pull rope; 510, fixed column; 6, driving mechanism; 61, fixed frame; 62, rotating wheel; 63, rotating shaft; 64, extrusion block; 65, trapezoidal extrusion block; 66, blocking block; 67, annular groove. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0035] Please refer to Figure 1 - Figure 8 The embodiment of the present application provides a technical solution: a submarine cable fault monitoring method, which uses a submarine cable fault monitoring device, including a sinking block 1 and a cable 2 fixedly connected to the upper end of the sinking block 1, and a detector body 4 arranged in the inner cavity of the lower side of the cable 2. The specific steps for using the above-mentioned submarine cable fault monitoring device are as follows:

[0036] S1, the entire sinking block 1 is placed into the sea from the ship through the cable 2, and then the cable 2 is straightened, so that the bottom end of the sinking block 1 can be vertically located directly above the cable;

[0037] S2, when seawater impacts, the heavier extension plate 31 moves inward, the lower end of the elastic metal band 32 moves away from the fixed column 510, automatically maintains balance, and when the elastic metal band 32 moves, balance can be maintained by transferring gas;

[0038] S3, when impacting, the elastic metal bands 32 on both sides are all bounced downward, and the amplitude of downward bouncing is the same, so that the whole stability can be maintained while bouncing and driving nearby fish.

[0039] The balance mechanism 3 can automatically change the gravity center position according to the impact of seawater, and the balance mechanism 3 is arranged in the sinking block 1.

[0040] The gas shifting mechanism 5 can balance the position of the sinking block 1 by changing the position of the gas, and the gas shifting mechanism 5 is arranged in the upper cavity of the sinking block 1.

[0041] And the driving mechanism 6 is used for automatically driving the surrounding fish, and the driving mechanism 6 is arranged in the sinking block 1.

[0042] Specifically, when seawater impacts, the heavier extension plate 31 moves inward, the lower end of the elastic metal band 32 on the same side moves away from the fixed column 510, which makes the gravity center of the side of the sinking block 1 close to the water flow impact automatically shift away from the side of the water flow impact, automatically maintains balance, and when the elastic metal band 32 moves, balance can be maintained by transferring gas, reduces the load of the ship body, reduces the transportation cost, the elastic metal bands 32 on both sides are all bounced downward, and the amplitude of downward bouncing is the same, so that the whole stability can be maintained while bouncing and driving nearby fish.

[0043] In still another embodiment of the present application, the balance mechanism 3 comprises an extension plate 31 movably inserted into the sinking block 1, one end of the extension plate 31 extends to the outside of the sinking block 1, one end of the extension plate 31 on the inside of the sinking block 1 is fixedly connected with an elastic metal band 32, an upper cavity of the sinking block 1 is fixedly connected with a fixed sleeve 51, the elastic metal band 32 is arranged in the fixed sleeve 51, and the elastic metal band 32 is movably arranged in the fixed sleeve 51 in a U shape, a fixed column 510 is fixedly connected at the center of the sinking block 1, the elastic metal band 32 is symmetrically provided with two about the fixed column 510, and one end of the elastic metal band 32 away from the fixed column 510 is provided with a pointed end 33.

[0044] Specifically, when seawater impacts, the heavier extension plate 31 moves inward, the lower end of the elastic metal band 32 on the same side moves away from the fixed column 510, which makes the gravity center of the side of the sinking block 1 close to the water flow impact automatically shift away from the side of the water flow impact, automatically maintains balance.

[0045] In still another embodiment of the present application, the gas shifting mechanism 5 comprises a fixed sleeve 51 fixed to the opposite sides of the fixed column 510, a gas storage cavity 53 is formed in the fixed sleeve 51, a lifting plate 52 is slidably arranged on the top of the gas storage cavity 53, one end of the elastic metal band 32 abuts against a round roller 54, the upper end of the round roller 54 is fixedly connected with a threaded rod 55, the threaded rod 55 is rotatably arranged in the fixed sleeve 51, a torsional spring 57 is fixedly connected between the outer wall of the upper end of the fixed sleeve 51 and the fixed sleeve 51, two partitions 58 are fixedly connected with the outer wall of the upper end of the threaded rod 55, a pull rope 59 is wound around the outer wall of the threaded rod 55 between the two partitions 58, the outer wall of the threaded rod 55 on the opposite sides of the fixed column 510 is wound with the same pull rope 59, and a threaded connecting rod 56 is threadedly connected with the outer wall of the threaded rod 55 and fixedly connected with the lifting plate 52.

[0046] The two fixed sleeves 51 are a group, and a plurality of groups of fixed sleeves 51 are arranged in the sinking block 1 in a ring shape at equal intervals.

[0047] The gas storage cavities 53 symmetrically distributed about the fixed column 510 are connected, and the weight of the elastic metal band 32 is smaller than that of the extension plate 31.

[0048] The winding directions of the pull ropes 59 on the threaded rods 55 on the two sides are opposite, the outer thread directions of the threaded rods 55 on the two sides are opposite, and initially, the pull rope 59 between the threaded rods 55 is in a taut state.

[0049] Specifically, when the elastic metal band 32 moves, the balance can be maintained by shifting the gas, which has more advantages than the traditional method of simply increasing the weight of the probe body 4 to maintain the balance, can reduce the weight of the sinking block 1 as a whole, and further reduce the load of the ship body and the transportation cost.

[0050] In still another embodiment of the present application, the driving mechanism 6 comprises a fixed frame 61 fixedly connected with the fixed sleeve 51, a rotating wheel 62 is rotatably arranged on the fixed frame 61, a rotating shaft 63 is fixedly connected with the center of the rotating wheel 62, one end of the rotating shaft 63 extends to the outside of the fixed frame 61, a trapezoidal extrusion block 65 is rotatably arranged on the outer wall of the end of the rotating shaft 63 located outside the fixed frame 61, a ring-shaped groove 67 is formed in the side wall of the trapezoidal extrusion block 65 close to the fixed frame 61, a blocking block 66 is slidably arranged in the ring-shaped groove 67, the blocking block 66 is fixedly connected with the outer wall of the fixed frame 61, and an extrusion block 64 is fixedly connected with the elastic metal band 32 on the upper side of the trapezoidal extrusion block 65.

[0051] The extrusion blocks 64 are arranged at equal intervals, and the lengths of the extrusion blocks 64 gradually decrease in the direction away from the pointed end 33.

[0052] Specifically, the two elastic metal bands 32 are both downwardly elastic, and the elastic range of the two elastic metal bands 32 is the same, so that the two elastic metal bands 32 can keep the whole stable while driving the nearby fish, and the runner 62 can reduce the friction and automatically change the position of the trapezoidal extrusion block 65 by rotating, so that the lower ends of the two elastic metal bands 32 can intermittently elastically move downward.

[0053] Working principle: when in use, the whole sinking block 1 is placed into the sea from the ship through the cable 2, then the cable 2 is straightened, so that the bottom end of the sinking block 1 can be vertically located above the cable, the bottom end of the probe body 4 is perpendicular to the axial direction of the cable, which can ensure that the signal is effectively reflected, when the sea water impacts, the extending plate 31 extending to one end outside the sinking block 1 is arc-shaped, so that the sea water can extrude the extending plate 31 inward, when the heavier extending plate 31 on one side moves inward, the lower end of the lighter elastic metal band 32 on the same side moves away from the fixed column 510, which makes the center of gravity of the sinking block 1 near the side impacted by the water flow automatically move away from the side impacted by the water flow, so that the center of gravity of the upper end of the sinking block 1 is away from the impact position, and when the sinking block 1 and the cable 2 rotate, the upper end of the sinking block 1 near the impact position rotates downward, so that the bottom end of the sinking block 1 cannot be vertically located above the cable, and due to the pulling of the pull rope 59, the threaded rod 55 on the other side rotates in the same direction as the threaded rod 55 on the same side, so that the extending plate 31 on the other side moves away from the fixed column 510, further moving the center of gravity away from the impact position;

[0054] When the threaded rod 55 near the impact position rotates, the threaded connecting rod 56 and the lifting plate 52 move upward, and the lifting plate 52 on the other side moves downward, so that more gas enters the gas storage chamber 53 near the impact position, so that the side of the upper end of the sinking block 1 near the impact position can rotate upward due to the buoyancy of the gas, so as to further prevent the sinking block 1 from tilting, and prevent the sinking block 1 and the cable 2 from rotating together when the sinking block 1 is impacted by the water flow, so that the bottom end of the sinking block 1 is no longer in the vertical state;

[0055] And since the balance is maintained by transferring gas, compared with the traditional method of simply increasing the weight of the probe body 4 to maintain balance, it has more advantages, can reduce the weight of the whole sinking block 1, and further reduce the load of the ship body and transportation cost;

[0056] It should be noted that the lower end of the elastic metal band 32 can swing up and down, the upper end of the sharp end 33 is in close contact with the fixed sleeve 51, when the lower end of the elastic metal band 32 moves, through the extrusion of the block 64 and the extrusion of the trapezoidal extrusion block 65, the lower end of the elastic metal band 32 can be intermittently bounced down, the elastic metal band 32 on the other side moves reversely, at this time, the runner 62 is in contact with the elastic metal band 32, so that the elastic metal band 32 rotates reversely, the outer wall of the rotating shaft 63 is in friction with the inner wall of the trapezoidal extrusion block 65, so as to drive the trapezoidal extrusion block 65 to rotate, thereby making the trapezoidal extrusion block 65 rotate 180 degrees, so that the lower end of the elastic metal band 32 on the other side can also be intermittently bounced down, the length of the extrusion block 64 gradually decreases in the direction away from the sharp end 33, because when the lower end of the elastic metal band 32 on both sides bounces down, the position of the elastic metal band 32 extruded by the runner 62 is different, the intensity of the elastic metal band 32 hitting downward is also different, the elastic metal band 32 on both sides bounces down, and the amplitude of the elastic metal band 32 bouncing down is the same, thereby bouncing, driving the fish nearby, and at the same time, the stability of the whole can be maintained.

[0057] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A submarine cable fault monitoring method using a submarine cable fault monitoring device, comprising a sinking block (1) and a cable (2) fixed to the upper end of the sinking block (1), and a detector body (4) is arranged in the lower cavity of the cable (2), characterized in that: a balancing mechanism (3) is arranged in the sinking block (1) and can automatically change the center of gravity according to the impact of seawater, the balancing mechanism (3) comprises an extension plate (31) movably arranged in the sinking block (1), one end of the extension plate (31) extends to the outside of the sinking block (1), one end of the extension plate (31) on the inside of the sinking block (1) is fixedly connected with an elastic metal belt (32), a fixed sleeve (51) is fixedly connected to the upper cavity of the sinking block (1), the elastic metal belt (32) is arranged in the fixed sleeve (51), and the elastic metal belt (32) is movably arranged in the fixed sleeve (51) in a U-shaped manner, a fixed column (510) is fixedly connected to the center of the sinking block (1), two elastic metal belts (32) are symmetrically arranged about the fixed column (510), and a sharp end (33) is arranged at one end of the elastic metal belt (32) away from the fixed column (510); a gas moving mechanism (5) is arranged in the upper cavity of the sinking block (1) and can balance the position of the sinking block (1) by changing the position of the gas; and a driving mechanism (6) is arranged in the sinking block (1) and is used for automatically driving the fish around. The specific steps of using the submarine cable fault monitoring device are as follows: S1, the whole sinking block (1) is placed into the sea through the cable (2) from the ship, then the cable (2) is straightened, so that the bottom end of the sinking block (1) can be vertically located above the cable; S2, when the seawater impacts, the heavier extension plate (31) moves inward, the lower end of the elastic metal belt (32) moves away from the fixed column (510), automatically maintains balance, and when the elastic metal belt (32) moves, the balance can be maintained by transferring the gas; S3, when impacted, the elastic metal belts (32) on both sides are elastically moved downward, and the amplitude of the downward elastic movement is the same, so that the fish around can be driven while the stability of the whole is maintained. ​ ​ ​ 2. A method of monitoring a subsea cable for faults as claimed in claim 1, characterised in that: The gas moving mechanism (5) comprises fixed sleeves (51) fixed to opposite sides of a fixed column (510), a gas storage cavity (53) is formed in the fixed sleeve (51), a lifting plate (52) is slidably arranged on the inner top of the gas storage cavity (53), one end of the elastic metal band (32) abuts against a round roller (54), a threaded rod (55) is fixedly connected to the center of the upper end of the round roller (54), and the threaded rod (55) is rotatably arranged in the fixed sleeve (51); a torsion spring (57) is fixedly connected between the outer wall of the upper end of the fixed sleeve (51) and the fixed sleeve (51); two baffle plates (58) are fixedly connected to the outer wall of the upper end of the threaded rod (55), and a pull rope (59) is wound around the outer wall of the threaded rod (55) between the two baffle plates (58); the same pull rope (59) is wound around the outer wall of the threaded rod (55) on the opposite sides of the fixed column (510); a threaded connecting rod (56) is threadedly connected to the outer wall of the threaded rod (55), and the threaded connecting rod (56) is fixedly connected to the lifting plate (52).

3. A method of monitoring a subsea cable for faults as claimed in claim 2, characterised in that: The driving mechanism (6) comprises a fixed frame (61) fixedly connected to the fixed sleeve (51), a rotating wheel (62) rotatably arranged on the fixed frame (61), a rotating shaft (63) fixedly connected to the center of the rotating wheel (62), one end of the rotating shaft (63) extending to the outside of the fixed frame (61), a trapezoidal extrusion block (65) rotatably arranged on the outer wall of one end of the rotating shaft (63) located outside the fixed frame (61), an annular groove (67) formed in the side wall of the trapezoidal extrusion block (65) close to the fixed frame (61), a blocking block (66) slidably arranged in the annular groove (67), the blocking block (66) fixedly connected to the outer wall of the fixed frame (61), and an extrusion block (64) fixedly connected to the elastic metal band (32) on the upper side of the trapezoidal extrusion block (65).

4. A method of monitoring a subsea cable for faults as claimed in claim 2, characterised in that: The two fixed sleeves (51) form a group, and a plurality of groups of fixed sleeves (51) are arranged in the sinking block (1) in a ring shape at equal intervals.

5. A method of monitoring a subsea cable for faults as claimed in claim 2, characterised in that: The gas storage cavities (53) symmetrically distributed on the fixed column (510) are connected in communication, and the weight of the elastic metal band (32) is smaller than that of the extension plate (31).

6. A method of monitoring a subsea cable for faults as claimed in claim 2, characterised in that: The pull ropes (59) on the threaded rods (55) on the two sides are wound in opposite directions, the outer threads of the threaded rods (55) on the two sides are opposite, and initially, the pull rope (59) between the threaded rods (55) on the two sides is in a taut state.

7. A method of monitoring a subsea cable for faults as claimed in claim 3, characterised in that: The extrusion blocks (64) are arranged at equal intervals, and the length of the extrusion blocks (64) gradually decreases in the direction away from the sharp end (33).

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