Submarine cable protection device and submarine cable protection method

Abstract

The invention discloses a submarine cable protection device and a submarine cable protection method, and relates to the technical field of submarine cable protection. The submarine cable protection device comprises a door-shaped frame, a connecting rod, a transmission mechanism and two groove bottom shielding plates, the door-shaped frame is provided with a top cavity and a side cavity, the top cavity is composed of an upper top plate and a lower top plate, the side cavity is composed of an outer side plate and an inner side plate, an avoiding opening is formed in the lower end of the side cavity, and a connecting hole is formed in the upper top plate; the connecting rod is positioned in the connecting hole; the transmission mechanism is in transmission connection with the connecting rod; the two groove bottom shielding plates are located at the receding openings respectively and connected with the transmission mechanism, and the length direction of the connecting hole is perpendicular to the movement direction of the two groove bottom shielding plates. When the two groove bottom shielding plates move in opposite directions, the connecting rod is driven by the transmission mechanism to partially extend out of the connecting hole; and when the two groove bottom shielding plates move back to back, the connecting rod is driven by the transmission mechanism to retract into the connecting hole. The submarine cable protection device is simple in structure, and submarine cables in ship operation sea areas and areas where submarine cables are prone to being suspended can be annularly covered and protected.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable protection, and in particular to a submarine cable protection device and a submarine cable protection method. Background Art

[0002] Offshore wind farms are generally composed of offshore wind turbines, offshore substations, submarine cables, etc. The electricity generated by wind turbines needs to be transmitted to the offshore substations via submarine cables, where the voltage is increased and then sent to the onshore control center to be integrated into the local power grid. In recent years, with the continuous construction of offshore wind farms and grid-connected power generation operations, the problems of submarine cables in many offshore wind farms have continued to emerge, and some even pose safety hazards to the safe operation of wind turbines.

[0003] With the further development of the ocean, production activities such as maritime shipping and fishing are becoming more and more frequent, and human factors are becoming more and more threatening to the safe operation of submarine cables. Among them, the submarine cable failure caused by ship anchors is the most frequent. During the process of anchoring and unanchoring, the anchor hook pierces the cable or the anchor hook that hangs on the cable drags the cable during lifting. When the ship is anchored, it is hooked on the submarine cable. When unanchoring, the operator does not strictly follow the specifications to operate the anchoring, and the anchor damages the outer insulation layer of the submarine cable, which will cause the submarine cable to be broken down and damaged. Compared with land cables, the environment in which submarine cables are located is more complex. It is very easy to cause damage to the submarine cable due to changes in geological conditions such as irregular movement of the seabed or strong tensile forces caused by the tidal movement of the seabed, such as tides, earthquakes, and crustal movements. Undersea natural phenomena and disasters cause the insulation layer of the submarine cable to age, be damaged, or even break, which in turn leads to accidents such as grounding or phase short circuits of the submarine cable. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a submarine cable protection device and a submarine cable protection method, which can provide circumferential coverage protection for submarine cables in sea areas where ships operate and areas where submarine cables are prone to hanging.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A submarine cable protection device is provided, comprising:

[0007] A door-shaped frame, wherein the door-shaped frame has a top chamber located at the top and side chambers located at both sides, the top chamber is composed of an upper top plate and a lower top plate, and the side chamber is composed of an outer side plate and an inner side plate, the outer side plate is connected to the upper top plate, the inner side plate is connected to the lower top plate, the outer side plate and the inner side plate, and the upper top plate and the lower top plate are respectively connected through an intermediate connecting portion, the side chamber is connected to the top chamber, the lower end of the side chamber is provided with an avoidance opening, and the upper top plate is provided with a connecting hole;

[0008] A connecting rod, wherein the connecting rod is located in the connecting hole;

[0009] A transmission mechanism, the transmission mechanism is transmission-connected to the engagement rod;

[0010] Two slot bottom shields, respectively located at one of the avoidance openings and connected to the transmission mechanism, the two slot bottom shields can move toward each other to a closed state or move away from each other to an open state, and the length direction of the connecting hole is perpendicular to the movement direction of the two slot bottom shields;

[0011] When the two groove bottom shields move toward each other, the transmission mechanism can drive the connecting rod to partially extend out of the connecting hole; when the two groove bottom shields move away from each other, the transmission mechanism can drive the connecting rod to retract into the connecting hole.

[0012] As a further solution of the submarine cable protection device, the two bottom shields are respectively a first bottom shield located on the left and a second bottom shield located on the right; the transmission mechanism includes:

[0013] An upper rack, the upper rack being arranged at the bottom of the upper top plate, and the upper rack being connected to the first groove bottom shield plate through a first connecting rod;

[0014] A lower rack, the lower rack is arranged on the top of the lower top plate, the lower rack is connected to the second slot bottom shield plate through a second connecting rod, the upper rack is parallel to the lower rack, and the lengths of the upper rack and the lower rack both extend along the movement direction of the two slot bottom shield plates;

[0015] A first gear, the first gear is located between the upper rack and the lower rack and meshes with the upper rack and the lower rack respectively, a first fixed shaft is rotatably connected in the shaft hole of the first gear, and the first fixed shaft is fixedly connected to the door-shaped frame;

[0016] The second gear is arranged in the installation groove opened in the upper top plate, the installation groove is connected with the connecting hole, and the notch of the installation groove is opposite to the first gear, the second gear part protrudes from the notch of the installation groove and meshes with the first gear, and the axial hole of the second gear is screwed with the connecting rod.

[0017] As a further solution of the submarine cable protection device, the transmission mechanism also includes a first guide rail and a second guide rail parallel to each other, the length of the first guide rail extends along the length direction of the upper rack, and the length of the second guide rail extends along the length direction of the lower rack, the first guide rail is installed at the bottom of the upper top plate, the upper rack is guided and cooperated with the first guide rail, the second guide rail is installed at the top of the lower top plate, the lower rack is guided and cooperated with the second guide rail, the first groove bottom shield can push the upper rack to slide along the length direction of the first guide rail through the first connecting rod, and the second groove bottom shield can push the lower rack to slide along the length direction of the second guide rail through the second connecting rod.

[0018] As a further solution of the submarine cable protection device, the first groove bottom shield is detachably connected to the first connecting rod, and the second groove bottom shield is detachably connected to the second connecting rod.

[0019] As a further solution of the submarine cable protection device, a first plug-in slot is provided at the top of the first slot bottom shield plate, and a second plug-in slot is provided at the top of the second slot bottom shield plate, the second plug-in slot is an L-shaped structure, the first plug-in slot and the second plug-in slot are mirror-symmetrical, the second connecting rod is L-shaped, the first connecting rod and the second connecting rod are mirror-symmetrical, the upper end of the first connecting rod is fixedly connected to the end of the upper rack, the lower end of the first connecting rod is clamped to the first plug-in slot, the upper end of the second connecting rod is fixedly connected to the end of the lower rack, and the lower end of the second connecting rod is clamped to the second plug-in slot.

[0020] As a further solution of the submarine cable protection device, a first arc-shaped notch is provided at the top of the first groove bottom shield near the edge of the second groove bottom shield, and a second arc-shaped notch is provided at the top of the second groove bottom shield near the edge of the first groove bottom shield. When the first groove bottom shield and the second groove bottom shield move toward each other to a closed state, the center of the first arc-shaped notch overlaps with the center of the second arc-shaped notch, and the first arc-shaped notch and the second arc-shaped notch respectively fit the outer circumference of the submarine cable located in the door-shaped frame.

[0021] As a further solution of the submarine cable protection device, the connecting rod has a first end and a second end along its length direction, and a receiving groove is opened on the outer periphery of the connecting rod adjacent to the second end, and an elastic part and a clamping part are installed in the receiving groove, one end of the elastic part is connected to the receiving groove, and the other end is connected to the clamping part, one end of the clamping part along its length direction is connected to the groove wall of the receiving groove, and the other end extends obliquely toward the outside of the connecting rod; correspondingly, the inner wall of the connecting hole is provided with a clamping groove matching the clamping part near the first end of the connecting rod, and the second end of the connecting rod can extend out of the connecting hole and be inserted into the connecting hole of an adjacent submarine cable protection device until the clamping part is clamped with the clamping groove.

[0022] As a further solution of the submarine cable protection device, it also includes an anti-hook mechanism, and one of the anti-hook mechanisms is respectively installed on the two outer side walls opposite to each other of the door-shaped frame.

[0023] As a further solution of the submarine cable protection device, the anti-hook mechanism includes an anti-hook plate, a second fixed shaft and a spring. The second fixed shaft is installed on the outer wall of the door-shaped frame. The upper end of the anti-hook plate is rotatably connected to the second fixed shaft. One end of the spring is connected to the outer wall of the door-shaped frame, and the other end is connected to the side wall of the anti-hook plate. The spring is located below the second fixed shaft.

[0024] On the other hand, a method for protecting a submarine cable is provided, which uses a plurality of the submarine cable protection devices as described above, and comprises the following steps:

[0025] (1) Pull at least one of the bottom shields of the submarine cable protection device in a direction away from the other bottom shield, so that the two bottom shields are in an open state;

[0026] (2) Passing the submarine cable through the two bottom shields of the slot and placing it in the door-shaped frame;

[0027] (3) Push at least one of the bottom shields of the trench toward another bottom shield of the trench, so that the two bottom shields of the trench are in a closed state, and the connecting rod of the submarine cable protection device extends out and is inserted into the connecting hole of another adjacent submarine cable protection device;

[0028] Repeat steps (1) to (3) until all the submarine cable protection devices are installed in the area to be protected of the submarine cable.

[0029] Beneficial effects:

[0030] (1) The submarine cable protection device of the present invention has a simple structure and is easy to install. It only requires pushing the bottom shield plate on one side of the groove to simultaneously complete the axial and lateral installation of the submarine cable, thereby achieving circumferential coverage and protection of the submarine cable in the sea area where ships are operating and in areas where submarine cables are prone to being suspended. The underwater installation process of the submarine cable protection device of the present invention is simple, which can shorten the installation time, reduce construction costs, and lower installation costs.

[0031] (2) The external weak parts (anti-hook plate, groove bottom shield plate) of the submarine cable protection device of the present invention are fixed by simple connection methods such as fixed shaft or clamping. If damage occurs later, the parts can be quickly replaced without replacing the entire device, which greatly reduces the operation and maintenance costs.

[0032] (3) The present invention provides 360° all-round protection for the submarine cable, effectively improving the overall strength and rigidity, and allowing the submarine cable to smoothly cross areas with undulating terrain.

[0033] (4) The present invention can effectively prevent damage to submarine cables caused by anchors hooking on submarine cables, reduce the damage rate of submarine cables, and reduce operating and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0035] Figure 1 It is a schematic diagram of a submarine cable protection device (two slot bottom shields are in an open state) according to an embodiment of the present invention along the radial direction of the submarine cable.

[0036] Figure 2 It is a schematic diagram of a submarine cable protection device (two slot bottom shields are in a closed state) according to an embodiment of the present invention along the radial direction of the submarine cable.

[0037] Figure 3 This is a schematic diagram of a submarine cable protection device according to an embodiment of the present invention along the axial direction of the submarine cable.

[0038] Figure 4 It is a schematic diagram of two groove bottom shields described in an embodiment of the present invention.

[0039] Figure 5 Schematic diagram of the connecting rod according to an embodiment of the present invention.

[0040] In the figure:

[0041] 100, door frame; 101, top chamber; 102, side chamber; 103, connection hole; 104, mounting slot; 105, card slot; 110, upper top plate; 120, lower top plate; 130, outer side plate; 140, inner side plate;

[0042] 200, connecting rod; 210, receiving slot;

[0043] 300, transmission mechanism; 310, upper rack; 320, lower rack; 330, first gear; 340, second gear; 350, first connecting rod; 351, first main rod; 352, first clamping rod; 360, second connecting rod; 361, second main rod; 362, second clamping rod; 370, first fixed shaft; 380, first guide rail; 390, second guide rail;

[0044] 400, first groove bottom shield; 410, first main groove; 420, first clamping groove; 430, first arc-shaped notch;

[0045] 500, second groove bottom shield; 510, second main groove; 520, second clamping groove; 530, second arc-shaped notch;

[0046] 610, elastic portion; 620, clamping portion;

[0047] 700, anti-hook mechanism; 710, anti-hook plate; 720, second fixed shaft; 730, spring. DETAILED DESCRIPTION

[0048] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0049] like Figures 1 to 5 As shown, the submarine cable protection device of this embodiment includes a door frame 100, a connecting rod 200, a transmission mechanism 300 and two groove bottom shields.

[0050] Among them, the door-shaped frame 100 has a top chamber 101 located at the top and side chambers 102 located on both sides, the top chamber 101 is composed of an upper top plate 110 and a lower top plate 120, and the side chamber 102 is composed of an outer plate 130 and an inner plate 140, the outer plate 130 is connected to the upper top plate 110, and the inner plate 140 is connected to the lower top plate 120, the outer plate 130 and the inner plate 140 as well as the upper top plate 110 and the lower top plate 120 are connected respectively by intermediate connecting parts, the side chamber 102 is connected to the top chamber 101, the lower end of the side chamber 102 is provided with an avoidance opening (not shown in the figure), and the upper top plate 110 is provided with a connecting hole 103.

[0051] The connecting rod 200 is located in the connecting hole 103 , and the transmission mechanism 300 is transmission-connected to the connecting rod 200 .

[0052] The two groove bottom shields are respectively located at one of the avoidance openings and are connected to the transmission mechanism 300. The two groove bottom shields can move toward each other to a closed state or move away from each other to an open state. The length direction of the connecting hole 103 is perpendicular to the movement direction of the two groove bottom shields. When the two groove bottom shields move toward each other, the connecting rod 200 can be driven to partially extend out of the connecting hole 103 through the transmission mechanism 300. When the two groove bottom shields move away from each other, the connecting rod 200 can be driven to retract into the connecting hole 103 through the transmission mechanism 300.

[0053] In this embodiment, the bottom shield plate is connected to the connecting rod 200 through the transmission mechanism 300. Figure 1 As shown, the two bottom shields are in an open state. When one bottom shield moves toward the direction close to the other bottom shield, the connecting rod 200 can be driven by the transmission mechanism 300 to move in the connecting hole 103 of the upper top plate 110 along the length direction of the connecting hole 103; when the two bottom shields are completely closed, as shown in FIG. Figure 2 As shown, the connecting rod 200 extends out of the connecting hole 103 and can be inserted into the connecting hole 103 of another adjacent submarine cable protection device, so that the submarine cable protection device can be installed axially and transversely along the cable at the same time. The installation process is simple, which can effectively shorten the installation time and reduce the installation cost.

[0054] It should be noted that, in this embodiment, both sides of the door frame 100 along the axis of the coastal cable and the bottom of the door frame 100 are connected and sealed by an intermediate connecting part (the intermediate connecting part is not shown in the figure), and only an avoidance opening is opened in the intermediate connecting part at the bottom of the door frame 100, and the avoidance opening is used for the transmission connection between the groove bottom shield plate and the transmission mechanism 300.

[0055] Furthermore, the two bottom shields are respectively a first bottom shield 400 located on the left and a second bottom shield 500 located on the right; Figure 3 As shown, the transmission mechanism 300 includes an upper rack 310 , a lower rack 320 , a first gear 330 , a second gear 340 , a first connecting rod 350 , and a second connecting rod 360 .

[0056] The upper rack 310 is arranged at the bottom of the upper top plate 110, and the upper rack 310 is connected to the first slot bottom shield plate 400 through the first connecting rod 350; the lower rack 320 is arranged at the top of the lower top plate 120, and the lower rack 320 is connected to the second slot bottom shield plate 500 through the second connecting rod 360, the upper rack 310 is parallel to the lower rack 320, and the lengths of the upper rack 310 and the lower rack 320 are extended along the movement direction of the two slot bottom shield plates; the first gear 330 is located between the upper rack 310 and the lower rack 320, and is respectively connected to the upper rack 310 and the lower rack 320. The rack 310 is meshed with the lower rack 320, and the first fixed shaft 370 is rotatably connected in the axial hole of the first gear 330, and the first fixed shaft 370 is fixedly connected to the door frame 100; the second gear 340 is arranged in the installation groove 104 opened on the upper top plate 110, and the installation groove 104 is connected with the connecting hole 103, and the notch of the installation groove 104 is opposite to the first gear 330, and the second gear 340 partially protrudes from the notch of the installation groove 104 and meshes with the first gear 330, and the axial hole of the second gear 340 is threadedly screwed with the connecting rod 200.

[0057] In this embodiment, the first slot bottom shield plate 400 is connected to the upper rack 310 through the first connecting rod 350. When the first slot bottom shield plate 400 moves relatively toward the direction close to the second slot bottom shield plate 500, the first slot bottom shield plate 400 can push the upper rack 310 toward the right side (refer to Figure 1 The second slot bottom shield plate 500 is connected to the lower rack 320 through the second connecting rod 360. When the second slot bottom shield plate 500 moves relatively toward the direction close to the first slot bottom shield plate 400, the second slot bottom shield plate 500 can push the lower rack 320 to move toward the left side. Since the first gear 330 is respectively engaged with the upper rack 310 and the lower rack 320, the lateral movement of the upper rack 310 and the lower rack 320 drives the first gear 330 to rotate around the first fixed axis 370. At the same time, since the first gear 330 is meshed with the second gear 340, the first gear 330 drives the second gear 340 to rotate, and the axial hole of the second gear 340 is provided with an internal thread, and the outer periphery of the connecting rod 200 is provided with an external thread, and the axial hole of the second gear 340 is threadedly screwed with the connecting rod 200. Since the second gear 340 is confined in the mounting groove 104, when the second gear 340 rotates, it drives the connecting rod 200 to rotate and moves along the length direction of the connecting hole 103 at the same time.

[0058] In order to prevent the mounting groove 104 from hindering the rotation of the second gear 340, the size of the mounting groove 104 is slightly larger than the second gear 340, that is, the two ends of the second gear 340 along its axial direction are clearance-matched with the groove wall of the mounting groove 104, and the outer periphery of the second gear 340 is clearance-matched with the groove bottom of the mounting groove 104.

[0059] Furthermore, the transmission mechanism 300 also includes a first guide rail 380 and a second guide rail 390 parallel to each other, the length of the first guide rail 380 extends along the length direction of the upper rack 310, and the length of the second guide rail 390 extends along the length direction of the lower rack 320, the first guide rail 380 is installed at the bottom of the upper top plate 110, the upper rack 310 is guided and cooperated with the first guide rail 380, the second guide rail 390 is installed at the top of the lower top plate 120, and the lower rack 320 is guided and cooperated with the second guide rail 390, the first groove bottom shield plate 400 can push the upper rack 310 to slide along the length direction of the first guide rail 380 through the first connecting rod 350, and the second groove bottom shield plate 500 can push the lower rack 320 to slide along the length direction of the second guide rail 390 through the second connecting rod 360.

[0060] The first guide rail 380 is fixed to the bottom of the upper top plate 110, and the upper rack 310 can move along the length direction of the first guide rail 380. In order to prevent the upper rack 310 from deforming, the present embodiment can also convexly set a slider on the top of the upper rack 310, the slider extending along the length direction of the first guide rail 380, and correspondingly, a slide groove cooperating with the slider is provided at the bottom of the first guide rail 380, the cross section of the slide groove can be a trapezoidal structure, and the cross section of the slider is a trapezoidal structure. The first guide rail 380 can be suspended at the bottom of the first guide rail 380 through the cooperation of the slider and the slide groove, and move along the length direction of the first guide rail 380. The second guide rail 390 is fixed to the top of the lower top plate 120, and the lower rack 320 can move along the length direction of the second guide rail 390. Similarly, a slider can be protruded from the bottom of the lower rack 320, and a slide groove can be set at the top of the second guide rail 390. The structure and matching method of the slider and the slide groove are the same as the matching method between the above-mentioned upper rack 310 and the first guide rail 380, and the details will not be repeated.

[0061] In other embodiments, the slider may be disposed on the first guide rail 380 and the second guide rail 390, and the slide groove may be disposed on the upper rack 310 and the lower rack 320, so that the guiding cooperation between the upper rack 310 and the lower rack 320 can also be achieved, and the details will not be repeated.

[0062] The structures and matching methods of the above-mentioned slider and slide groove are conventional technical means in the field and will not be described in detail.

[0063] Furthermore, the first trough bottom shield plate 400 is detachably connected to the first connecting rod 350, and the second trough bottom shield plate 500 is detachably connected to the second connecting rod 360. If the first trough bottom shield plate 400 or the second trough bottom shield plate 500 is damaged subsequently, the components can be quickly replaced without the need for overall replacement, thereby reducing operating and maintenance costs.

[0064] For example, a first plug-in slot is provided at the top of the first slot bottom shield plate 400, and a second plug-in slot is provided at the top of the second slot bottom shield plate 500. The second plug-in slot is an L-shaped structure, and the first plug-in slot and the second plug-in slot are mirror-symmetrical. The second connecting rod 350 is L-shaped, and the first connecting rod 350 and the second connecting rod 360 are mirror-symmetrical. The upper end of the first connecting rod 350 is fixedly connected to the end of the upper rack 310, and the lower end of the first connecting rod 350 is clamped to the first plug-in slot, the upper end of the second connecting rod 360 is fixedly connected to the end of the lower rack 320, and the lower end of the second connecting rod 360 is clamped to the second plug-in slot.

[0065] like Figure 4As shown, the first plug-in slot includes a first main slot 410 and a first clamping slot 420 which are opened on the top of the first slot bottom shield 400 and are connected to each other. The first clamping slot 420 is located on the left side of the first main slot 410, and a slot wall on one side of the first clamping slot 420 is in the same plane as the slot bottom of the first main slot 410. In the vertical direction, the depth of the first clamping slot 420 is less than the depth of the first main slot 410. The first connecting rod 350 includes a first main rod 351 and a first clamping rod 352 which are vertically connected. The first clamping rod 352 Located on the left side of the first main rod 351, the upper end of the first main rod 351 is vertically connected to the left end of the upper rack 310, and the lower end of the first main rod 351 is connected to the right end of the first clamping rod 352. In the vertical direction, the depth of the first clamping groove 420 matches the thickness of the first clamping rod 352, the width of the first main groove 410 matches the length of the first clamping rod 352, and the first main rod 351 partially extends out of the escape opening at the lower end of the side chamber 102 on the left side, and the first clamping rod 352 is located outside the side chamber 102. When installing the first slot bottom shield 400, first align the first clamping rod 352 with the first main groove 410 and insert it, and then push the first slot bottom shield 400 horizontally to the right, so that the first clamping rod 352 is inserted into the first clamping groove 420 to achieve clamping and fixing. Similarly, the second plug-in slot includes a second main slot 510 and a second clamping slot 520 which are opened on the top of the second slot bottom shield 500 and are connected to each other. The second clamping slot 520 is located on the right side of the second main slot 510, and a slot wall on one side of the second clamping slot 520 is in the same plane as the slot bottom of the second main slot 510. In the vertical direction, the depth of the second clamping slot 520 is less than the depth of the second main slot 510. The second connecting rod 360 includes a second main rod 361 and a second clamping rod 362 which are vertically connected. 2 is located on the right side of the second main rod 361, the upper end of the second main rod 361 is vertically connected to the right end of the lower rack 320, the lower end of the second main rod 361 is connected to the end of the second clamping rod 362, along the vertical direction, the depth of the second clamping groove 520 matches the thickness of the second clamping rod 362, the width of the second main groove 510 matches the length of the second clamping rod 362, the second main rod 361 partially extends out of the escape opening at the lower end of the side chamber 102 on the right side, and the second clamping rod 362 is located outside the side chamber 102. When installing the second slot bottom shield 500, first align the second clamping rod 362 with the second main groove 510 and insert it, then push the second slot bottom shield 500 horizontally to the left, so that the second clamping rod 362 is inserted into the second clamping groove 520 to achieve clamping and fixing.

[0066] Of course, in order to improve the movement stability of the two slot bottom shields, the two connecting rods can be widened along the axial direction of the cable, which can increase the contact area between the first slot bottom shield 400 and the first connecting rod 350 and the contact area between the second slot bottom shield 500 and the second connecting rod 360, and improve the clamping stability between the first slot bottom shield 400 and the first connecting rod 350 and the clamping stability between the second slot bottom shield 500 and the second connecting rod 360. Further, along the axial direction of the cable, the two sides of the slot bottom shield, the two sides of the outer plate 130 and the two sides of the inner plate 140 are aligned respectively, so as to achieve full circumferential coverage of the submarine cable.

[0067] Furthermore, a first arc-shaped notch 430 is opened at the top of the first groove bottom shield plate 400 near the edge of the second groove bottom shield plate 500, and a second arc-shaped notch 530 is opened at the top of the second groove bottom shield plate 500 near the edge of the first groove bottom shield plate 400. When the first groove bottom shield plate 400 and the second groove bottom shield plate 500 move toward each other to a closed state, the center of the first arc-shaped notch 430 overlaps with the center of the second arc-shaped notch 530, and the first arc-shaped notch 430 and the second arc-shaped notch 530 are respectively fitted with the outer periphery of the submarine cable located in the door-shaped frame 100.

[0068] After the first arc-shaped notch 430 and the second arc-shaped notch 530 are closed, they fit with the outer circumference of the submarine cable in the door-shaped frame 100, and can also limit the submarine cable, ensuring that the installation positions of various submarine cable protection devices remain consistent along the axial direction of the submarine cable, so that the connecting rod 200 can be aligned with the connecting hole 103 of the adjacent submarine cable protection device and smoothly inserted for connection.

[0069] Further, the number of upper racks 310 is two, and the two upper racks 310 are respectively located on both sides of the second gear 340 along its axial direction, and the two upper racks 310 are spaced apart from the second gear 340; the number of lower racks 320 is two, and the two lower racks 320 are respectively located on both sides of the second gear 340 along its axial direction, and the two lower racks 320 are spaced apart from the second gear 340. The structural design of the two upper racks 310 and the two lower racks 320 can improve the rotation stability of the first gear 330. Among them, the first gear 330 is a long gear, which is sufficient to mesh with the second gear 340 and the two upper racks 310 (or the two lower racks 320) for transmission. Specifically, the two upper racks 310 are respectively located directly above the two lower racks 320. The two upper racks 310 are connected to the first slot bottom shield 400 through a first connecting rod 350, and the two lower racks 320 are connected to the second slot bottom shield 500 through a second connecting rod 360. Of course, in other embodiments, each upper rack 310 may be connected to the first slot bottom shield 400 via an independent first connecting rod 360 , and each lower rack 320 may be connected to the second slot bottom shield 500 via an independent second connecting rod 360 .

[0070] Furthermore, the connecting rod 200 has a first end and a second end along its length direction, and a receiving groove 210 is formed on the outer periphery of the connecting rod 200 adjacent to the second end. Figure 5 As shown, an elastic portion 610 and a clamping portion 620 are installed in the receiving groove 210, one end of the elastic portion 610 is connected to the groove bottom of the receiving groove 210, and the other end is connected to the clamping portion 620, one end of the clamping portion 620 along its length direction is connected to the groove wall of the receiving groove 210, and the other end extends obliquely toward the outside of the connecting rod 200; correspondingly, as shown in Figure 1 As shown, the inner wall of the connecting hole 103 is provided with a slot 105 matching the clamping portion 620 near the first end of the connecting rod 200, and the second end of the connecting rod 200 can extend out of the connecting hole 103 and be inserted into the connecting hole 103 of the adjacent submarine cable protection device until the clamping portion 620 is clamped with the slot 105.

[0071] Correspondingly, the end of the connection hole 103 close to the second end of the connection rod 200 is the outlet end, and the end of the connection hole 103 close to the first end of the connection rod 200 is the inlet end. When the first slot bottom shield plate 400 and / or the second slot bottom shield plate 500 are pushed inward, the connection rod 200 moves toward the outlet end, and the second end of the connection rod 200 extends from the outlet end of the connection hole 103 and is inserted into the inlet end of the connection hole 103 of the adjacent submarine cable protection device until the clamping portion 620 is clamped with the clamping groove 105 in the connection hole 103 of the adjacent submarine cable protection device. At this time, the first slot bottom shield plate 400 and the second slot bottom shield plate 500 are just in a closed state. The clamping of the clamping portion 620 and the clamping groove 105 can also prevent the first slot bottom shield plate 400 and the second slot bottom shield plate 500 from moving in opposite directions and opening, thereby preventing the submarine cable from falling out of the door frame 100.

[0072] In this embodiment, the outer side of the clamping part 620 is arranged at an angle with the connecting rod 200, so that the connecting rod 200 can be smoothly inserted into the adjacent connecting hole 103. When the clamping part 620 is located in the connecting hole 103, it abuts against the hole wall of the connecting hole 103 under the action of the elastic part 610; when the clamping part 620 extends out of the connecting hole 103, the elastic part 610 drives the clamping part 620 to further protrude to the outside of the connecting rod 200, and when the clamping part 620 is inserted into another connecting hole 103, the clamping part 620 is squeezed by the hole wall of the connecting hole 103 to continue to squeeze the elastic part 610 and move toward the receiving groove 210. When the clamping part 620 moves to the clamping groove 105, the elastic part 610 drives the clamping part 620 to pop out from the receiving groove 210 (the protruding part increases) and just get stuck in the clamping groove 105, thereby realizing the docking installation of two adjacent submarine cable protection devices.

[0073] The slot 105 is arranged in an annular direction, and no matter where the engaging portion 620 is located in the slot 105, the engaging portion 620 can be engaged with the slot 105. The elastic portion 610 is a spring, and is installed in the receiving slot 210 at an angle.

[0074] Furthermore, in order to improve the convenience of docking and installation of two adjacent submarine cable protection devices, the present embodiment can also set a guiding slope at the entrance end of the connecting hole 103 or at the second end of the connecting rod 200, so that the second end of the connecting rod 200 can be quickly inserted into the entrance end of the connecting hole 103 of another submarine cable protection device.

[0075] The submarine cable protection device of this embodiment also includes an anti-hook mechanism 700. The two outer walls (left and right outer walls) opposite to each other of the door frame 100 are respectively equipped with an anti-hook mechanism 700 to prevent the damage of the submarine cable caused by the anchor hooking the submarine cable, reduce the damage rate of the submarine cable, and reduce the operation and maintenance costs.

[0076] For example, the anti-hook mechanism 700 includes an anti-hook plate 710, a second fixed shaft 720 and a spring 730. The second fixed shaft 720 is mounted on the outer side wall of the door-shaped frame 100. The upper end of the anti-hook plate 710 is rotatably connected to the second fixed shaft 720. One end of the spring 730 is connected to the outer side wall of the door-shaped frame 100, and the other end is connected to the side wall of the anti-hook plate 710. The spring 730 is located below the second fixed shaft 720. The anti-hook plate 710 and the spring 730 can prevent the anchor from hooking up the submarine cable and causing damage to the submarine cable. The spring 730 can keep the angle between the anti-hook plate 710 and the side wall of the door-shaped frame 100 between 15° and 40° when the external force is small.

[0077] The specific anti-hook process is as follows: when an anchor falls on the upper end surface of the submarine cable protection device, under the action of ocean current and gravity, the anchor will slide down along the anti-hook plate 710 until it hooks the bottom of the anti-hook plate 710. When the anchor is pulled, the anti-hook plate 710 can flip upward around the second fixed axis 720. At the same time, the spring 730 is stretched, and the elastic force gradually increases. The anti-hook plate 710 can be rotated to an angle of 30° with the upper end surface of the door frame 100 to ensure that the anchor can be smoothly detached without hooking the submarine cable protection device. Then, under the action of the spring 730, the anti-hook plate 710 will return to the vicinity of the initial position after multiple vibrations, thereby realizing the anti-hook protection of the submarine cable protection device.

[0078] This embodiment also provides a submarine cable protection method, which uses the submarine cable protection device of any of the above embodiments, and includes the following steps:

[0079] (1) Pull at least one slot bottom shield of the submarine cable protection device in a direction away from the other slot bottom shield so that the two slot bottom shields are in a position as follows: Figure 1 The open position shown;

[0080] (2) Pass the submarine cable through the two bottom shields of the slot and place it in the door frame 100;

[0081] (3) Push at least one of the slot bottom shields toward the direction close to the other slot bottom shield so that the two slot bottom shields are in the following position: Figure 2 In the closed state shown, the connecting rod 200 of the submarine cable protection device extends out and is inserted into the connecting hole 103 of another adjacent submarine cable protection device;

[0082] Repeat steps (1) to (3) until the submarine cable protection device is completely installed in the area to be protected of the submarine cable.

[0083] In this embodiment, the submarine cable protection device can be installed in the anchor damage prone area on the seabed and the submarine cable suspended area with slightly uneven terrain, and the submarine cable can be covered along the cable axis to provide anti-hooking protection and circumferential coverage protection for the submarine cable. Among them, for the submarine cable suspended area with slightly uneven terrain, the submarine cable protection device of this embodiment can provide support for the suspended part of the submarine cable to prevent excessive bending of the submarine cable caused by the undulating terrain.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A submarine cable protection device, It is characterized in that include: A door-shaped frame, wherein the door-shaped frame has a top chamber located at the top and side chambers located at both sides, the top chamber is composed of an upper top plate and a lower top plate, and the side chamber is composed of an outer side plate and an inner side plate, the outer side plate is connected to the upper top plate, the inner side plate is connected to the lower top plate, the outer side plate and the inner side plate, and the upper top plate and the lower top plate are respectively connected through an intermediate connecting portion, the side chamber is connected to the top chamber, the lower end of the side chamber is provided with an avoidance opening, and the upper top plate is provided with a connecting hole; A connecting rod, wherein the connecting rod is located in the connecting hole; A transmission mechanism, the transmission mechanism is transmission-connected to the engagement rod; Two slot bottom shields, respectively located at one of the avoidance openings and connected to the transmission mechanism, the two slot bottom shields can move toward each other to a closed state or move away from each other to an open state, and the length direction of the connecting hole is perpendicular to the movement direction of the two slot bottom shields; When the two groove bottom shields move toward each other, the transmission mechanism can drive the connecting rod to partially extend out of the connecting hole; when the two groove bottom shields move away from each other, the transmission mechanism can drive the connecting rod to retract into the connecting hole.

2. The submarine cable protection device according to claim 1, It is characterized in that The two bottom shields are respectively a first bottom shield located on the left and a second bottom shield located on the right; the transmission mechanism comprises: An upper rack, the upper rack being arranged at the bottom of the upper top plate, and the upper rack being connected to the first groove bottom shield plate through a first connecting rod; A lower rack, the lower rack is arranged on the top of the lower top plate, the lower rack is connected to the second slot bottom shield plate through a second connecting rod, the upper rack is parallel to the lower rack, and the lengths of the upper rack and the lower rack both extend along the movement direction of the two slot bottom shield plates; A first gear, the first gear is located between the upper rack and the lower rack and meshes with the upper rack and the lower rack respectively, a first fixed shaft is rotatably connected in the shaft hole of the first gear, and the first fixed shaft is fixedly connected to the door-shaped frame; The second gear is arranged in the installation groove opened in the upper top plate, the installation groove is connected with the connecting hole, and the notch of the installation groove is opposite to the first gear, the second gear part protrudes from the notch of the installation groove and meshes with the first gear, and the axial hole of the second gear is screwed with the connecting rod.

3. The submarine cable protection device according to claim 2, It is characterized in that The transmission mechanism also includes a first guide rail and a second guide rail parallel to each other, the length of the first guide rail extends along the length direction of the upper rack, the length of the second guide rail extends along the length direction of the lower rack, the first guide rail is installed at the bottom of the upper top plate, the upper rack is guided and cooperated with the first guide rail, the second guide rail is installed at the top of the lower top plate, the lower rack is guided and cooperated with the second guide rail, the first groove bottom shield plate can push the upper rack to slide along the length direction of the first guide rail through the first connecting rod, and the second groove bottom shield plate can push the lower rack to slide along the length direction of the second guide rail through the second connecting rod.

4. The submarine cable protection device according to claim 2, It is characterized in that The first groove bottom shield plate is detachably connected to the first connecting rod, and the second groove bottom shield plate is detachably connected to the second connecting rod.

5. The submarine cable protection device according to claim 4, It is characterized in that A first plug-in slot is provided at the top of the first slot bottom baffle plate, and a second plug-in slot is provided at the top of the second slot bottom baffle plate. The second plug-in slot is an L-shaped structure, and the first plug-in slot and the second plug-in slot are mirror-symmetrical. The second connecting rod is L-shaped, and the first connecting rod and the second connecting rod are mirror-symmetrical. The upper end of the first connecting rod is fixedly connected to the end of the upper rack, and the lower end of the first connecting rod is clamped to the first plug-in slot. The upper end of the second connecting rod is fixedly connected to the end of the lower rack, and the lower end of the second connecting rod is clamped to the second plug-in slot.

6. The submarine cable protection device according to claim 2, It is characterized in that A first arc-shaped notch is provided at the top of the first groove bottom shield plate near the edge of the second groove bottom shield plate, and a second arc-shaped notch is provided at the top of the second groove bottom shield plate near the edge of the first groove bottom shield plate. When the first groove bottom shield plate and the second groove bottom shield plate move toward each other to a closed state, the center of the first arc-shaped notch overlaps with the center of the second arc-shaped notch, and the first arc-shaped notch and the second arc-shaped notch respectively fit the outer circumference of the submarine cable located in the door-shaped frame.

7. The submarine cable protection device according to claim 1, It is characterized in that The connecting rod has a first end and a second end along its length direction, and a receiving groove is provided on the outer periphery of the connecting rod adjacent to the second end, and an elastic part and a clamping part are installed in the receiving groove, one end of the elastic part is connected to the receiving groove, and the other end is connected to the clamping part, one end of the clamping part along its length direction is connected to the groove wall of the receiving groove, and the other end extends obliquely toward the outside of the connecting rod; correspondingly, the inner wall of the connecting hole is provided with a clamping groove matching the clamping part near the first end of the connecting rod, and the second end of the connecting rod can extend out of the connecting hole and be inserted into the connecting hole of an adjacent submarine cable protection device until the clamping part is clamped with the clamping groove.

8. The submarine cable protection device according to any one of claims 1 to 7, It is characterized in that It also includes an anti-hook mechanism, and one of the anti-hook mechanisms is respectively installed on two outer side walls of the door-shaped frame that are opposite to each other.

9. The submarine cable protection device according to claim 8, It is characterized in that The anti-hook mechanism includes an anti-hook plate, a second fixed shaft and a spring. The second fixed shaft is installed on the outer side wall of the door frame. The upper end of the anti-hook plate is rotatably connected to the second fixed shaft. One end of the spring is connected to the outer side wall of the door frame, and the other end is connected to the side wall of the anti-hook plate. The spring is located below the second fixed shaft.

10. A method for protecting a submarine cable, using a plurality of submarine cable protection devices according to any one of claims 1 to 9, It is characterized in that The following steps are involved: (1) Pull at least one of the bottom shields of the submarine cable protection device in a direction away from the other bottom shield, so that the two bottom shields are in an open state; (2) Passing the submarine cable through the two bottom shields of the slot and placing it in the door-shaped frame; (3) Push at least one of the bottom shields of the trench toward another bottom shield of the trench, so that the two bottom shields of the trench are in a closed state, and the connecting rod of the submarine cable protection device extends out and is inserted into the connecting hole of another adjacent submarine cable protection device; Repeat steps (1) to (3) until the submarine cable protection device is completely installed in the area to be protected of the submarine cable.

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