Submarine cable horn mouth center clamp

Abstract

The utility model relates to the technical field of submarine cable protection, in particular to a submarine cable horn mouth center clamp, which is arranged between a submarine cable and a horn mouth protection tube, and an outer sheath is sleeved on the submarine cable. The clamp comprises a guide conical head, a first buffer damping ring, a first clamping slip assembly, a second buffer damping ring and a second clamping slip assembly which are sequentially arranged on the outer sheath from left to right; the outer walls of the first buffering damping ring and the second buffering damping ring are tightly attached to the inner wall of the horn mouth protection pipe. According to the utility model, the clamp can be tightly hooped on the submarine cable to prevent the clamp from loosening, and the horn mouth protection pipe can be better limited on the submarine cable through the first buffer damping ring and the second buffer damping ring, so that when the submarine cable shakes under the influence of ocean current, the shake of the clamp is increased, and the clamp is easy to separate from the horn mouth protection pipe can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cable protection, in particular to a central fixture for the bell mouth of a submarine cable. Background Technique

[0002] Submarine cables are laid on the seabed for connecting and transmitting signals and electricity. With the rapid development of offshore oil and gas and offshore wind power development, as an important power transmission medium, they have been widely used. During use, the submarine cable passes through the seabed to above the platform through a protection pipe, and the installation method of the submarine cable and the protection pipe is to clamp the cable with a central fixture, and then when the submarine cable passes through the protection pipe, the outer part of the central fixture will be stuck in the protection pipe; in order to be able to pass through the pipe and be smoothly pulled to the upper part, the inner diameter of the protection pipe is relatively large, and there is also a large-slope bell mouth at the end. Therefore, the submarine cable will swing repeatedly under the influence of ocean currents in the protection pipe, especially at the bell mouth at the lower end of the protection pipe, where the large-slope bell mouth has a large flow-blocking effect, increasing the shaking of the submarine cable, and thus increasing the shaking received by the central fixture, making it easy to disengage from the protection pipe. Content of the Utility Model

[0003] The purpose of the utility model is to provide a central fixture for the bell mouth of a submarine cable, which can solve the problems that occur in the above background technique, that is, when the shaking of the submarine cable increases, the shaking received by the central fixture also increases, making it easy to disengage from the protection pipe.

[0004] The utility model adopts the following technical solutions to achieve the above purpose:

[0005] A central fixture for the bell mouth of a submarine cable, the fixture is arranged between the submarine cable and the bell mouth protection pipe, an outer sheath is sleeved on the submarine cable, and the fixture includes a guiding cone head, a first buffer damping ring, a first clamping chuck assembly, a second buffer damping ring, and a second clamping chuck assembly arranged on the outer sheath in sequence from left to right; the outer walls of the first buffer damping ring and the second buffer damping ring are closely attached to the inner wall of the bell mouth protection pipe.

[0006] Preferably, the first buffer damping ring and the second buffer damping ring have the same structure; the first buffer damping ring includes an inner clamping ring platform, an intermediate ring plate, and an outer annular platform, and annular clamping grooves for the inner clamping ring platform to be embedded are provided on the guiding cone head, the first clamping chuck assembly, and the second clamping chuck assembly.

[0007] Preferably, the guiding cone head includes two semi-circular chucks, and the annular clamping groove is opened on the right side surface of the semi-circular chuck; a plurality of third counterbores are opened on the semi-circular chuck, and two corresponding third counterbores on the two semi-circular chucks are connected by a third bolt.

[0008] Preferably, the first clamping collet assembly has the same structure as the second clamping collet assembly; the first clamping collet assembly includes four clamping collets, and the annular card slots are formed on the left and right side surfaces of the clamping collets; a plurality of first counterbores are formed in the clamping collets, and two corresponding first counterbores on two clamping collets are connected by a first bolt; the annular card slot is formed on the left side surface of the clamping collet of the second clamping collet assembly.

[0009] Preferably, a plurality of threaded holes are circumferentially formed on the right side surface of the semi-circular chuck, screws are screwed in the threaded holes, through holes for the screws to pass through are formed on the middle ring plate of the first buffer damping ring, the clamping collets of the first clamping collet assembly, the middle ring plate of the second buffer damping ring, and the clamping collets of the second clamping collet assembly, and the right end of the screw is locked by a nut.

[0010] Preferably, a sleeve is sleeved on the right end of the screw, and the nut is located on the right side surface of the sleeve.

[0011] Preferably, two inner tightening rings are respectively sleeved on the inner sides of the first clamping collet assembly and the second clamping collet assembly on the outer sheath, and annular placement grooves for placing the inner tightening rings are formed on the clamping collets of the first clamping collet assembly and the clamping collets of the second clamping collet assembly.

[0012] Preferably, the guiding cone head is made of stainless steel.

[0013] Preferably, the first buffer damping ring, the second buffer damping ring, the outer sheath, and the inner tightening ring are all formed by casting polyurethane elastomer.

[0014] Preferably, the clamping collets are made of stainless steel.

[0015] The beneficial effects of the present utility model:

[0016] (1) In the present utility model, when the fixture penetrates into the flared cable duct, the guiding cone head can be stuck on the middle conical inner wall of the flared cable duct to complete preliminary fixation. The first clamping collet assembly and the second clamping collet assembly can hold and clamp the submarine cable, and can fix the first buffer damping ring and the second buffer damping ring on the submarine cable, so that the fixture can be fixed on the submarine cable; the outer walls of the first buffer damping ring and the second buffer damping ring are closely attached to the inner wall of the flared cable duct, which can prevent the increase of the shaking of the fixture when the submarine cable shakes under the influence of ocean currents and is easy to separate from the flared cable duct, and can also play a certain buffering role.

[0017] (2) In an embodiment of the present utility model, the fastening position of the nut can be shifted to the right by the sleeve, so that the nut fastening operation space is located outside the flared cable duct, which is convenient for the fastening operation.

[0018] (3) In an embodiment of the present utility model, the inner tightening ring can prevent damage to the submarine cable caused by excessive local extrusion pressure when the clamping chuck clamps and squeezes the submarine cable.

[0019] The fixture in the present utility model can tightly hold the submarine cable to prevent the fixture from loosening, and can better limit the bellmouth protection tube on the submarine cable through the first buffer damping ring and the second buffer damping ring, so as to prevent the increase in the shaking force received by the fixture when the submarine cable shakes under the influence of the ocean current, and it is easy to disengage from the bellmouth protection tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model.

[0021] Figure 2 is a schematic structural diagram of the fixture.

[0022] Figure 3 is a schematic structural diagram of the first buffer damping ring.

[0023] Figure 4 is a schematic structural diagram of the guiding cone head.

[0024] Figure 5 is an internal structural diagram of the first clamping chuck assembly.

[0025] In the figure: 1 - submarine cable, 2 - bellmouth protection tube, 3 - outer sheath, 4 - guiding cone head, 5 - first buffer damping ring, 6 - first clamping chuck assembly, 7 - second buffer damping ring, 8 - second clamping chuck assembly, 21 - conical shape, 51 - inner clamping ring platform, 52 - intermediate ring plate, 53 - outer annular platform, 9 - annular clamping groove, 41 - semi-circular chuck, 42 - third counterbore, 43 - third bolt, 61 - clamping chuck, 62 - first counterbore, 63 - first bolt, 44 - threaded hole, 10 - screw rod, 11 - through hole, 12 - nut, 13 - sleeve, 14 - inner tightening ring, 15 - annular placement groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present utility model with reference to the accompanying drawings.

[0027] As Figure 1 - Figure 2As shown in the figure, a central fixture for a submarine cable bell mouth is provided between the submarine cable 1 and the bell mouth protection pipe 2. An outer sheath 3 is sleeved on the submarine cable 1, and the outer sheath 3 can prevent the fixture from clamping too tightly and causing damage to the submarine cable 1. The fixture includes a guiding cone head 4, a first buffer damping ring 5, a first clamping chuck assembly 6, a second buffer damping ring 7, and a second clamping chuck assembly 8 arranged on the outer sheath 3 in sequence from left to right. The middle part of the bell mouth protection pipe 2 is conical 21. When the fixture penetrates into the bell mouth protection pipe 2, the guiding cone head 4 can be stuck on the inner wall of the middle conical part 21 of the bell mouth protection pipe 2 to complete preliminary fixation. The first clamping chuck assembly 6 and the second clamping chuck assembly 8 can tightly hold and hoop the submarine cable 1, and can fix the first buffer damping ring 5 and the second buffer damping ring 7 on the submarine cable 1, so that the fixture can be fixed on the submarine cable 1. The outer walls of the first buffer damping ring 5 and the second buffer damping ring 7 are closely attached to the inner wall of the bell mouth protection pipe 2, which can prevent the fixture from being shaken more when the submarine cable 1 shakes under the influence of ocean currents and is likely to be separated from the bell mouth protection pipe 2, and can also play a certain buffering role.

[0028] As Figure 3 shown, the first buffer damping ring 5 and the second buffer damping ring 7 have the same structure. The first buffer damping ring 5 includes an inner clamping ring platform 51, a middle ring plate 52, and an outer annular platform 53. The inner clamping ring platform 51 is used to cooperate with the annular clamping groove 9 for subsequent installation. The middle ring plate 52 is used to open a through hole 11 for the subsequent screw 10 to pass through. The outer annular platform 53 is used to closely attach to the inner side wall of the bell mouth protection pipe 2, which can prevent the fixture from being shaken more when the submarine cable 1 shakes under the influence of ocean currents and is likely to be separated from the bell mouth protection pipe 2.

[0029] The guiding cone head 4, the first clamping chuck assembly 6, and the second clamping chuck assembly 8 are all provided with an annular clamping groove 9 for the inner clamping ring platform 51 to be embedded for subsequent installation. The left end of the inner clamping ring platform 51 of the first buffer damping ring 5 is clamped with the annular clamping groove 9 of the guiding cone head 4, and the right end is clamped with the left annular clamping groove 9 of the first clamping chuck assembly 6. The left end of the inner clamping ring platform 51 of the second buffer damping ring 7 is clamped with the right annular clamping groove 9 of the first clamping chuck assembly 6, and the right end is clamped with the left annular clamping groove 9 of the second clamping chuck assembly 8.

[0030] As Figure 4 shown, the guiding cone head 4 includes two semi-circular clamping heads 41. The annular clamping groove 9 is opened on the right side surface of the semi-circular clamping head 41 for the clamping of the first buffer damping ring 5. A plurality of third counterbores 42 are opened on the semi-circular clamping head 41, and the two corresponding third counterbores 42 on the two semi-circular clamping heads 41 are connected by a third bolt 43. The two semi-circular clamping heads 41 can be combined and tightly held and hooped on the submarine cable 1 through the third bolt 43, which can strengthen the fixation between the fixture and the submarine cable 1.

[0031] As Figure 5 shown, the structures of the first clamping chuck assembly 6 and the second clamping chuck assembly 8 are the same; the first clamping chuck assembly 6 includes four clamping chucks 61, and the annular clamping grooves 9 are formed on the left and right side surfaces of the clamping chucks 61, facilitating the clamping connection of the first buffer damping ring 5 and the second buffer damping ring 7; a plurality of first counterbores 62 are formed in the clamping chucks 61, and two corresponding first counterbores 62 on two clamping chucks 61 are connected by a first bolt 63. By using the first bolt 63 to combine and hold two clamping chucks 61 tightly around the submarine cable 1, the fixation between the fixture and the submarine cable 1 can be strengthened; the annular clamping groove 9 is formed on the left side surface of the clamping chuck 61 of the second clamping chuck assembly 8, facilitating the clamping connection of the second buffer damping ring 7.

[0032] As Figure 4 shown, a plurality of threaded holes 44 are circumferentially formed on the right side surface of the semi-circular chuck 41, and screws 10 are screwed into the threaded holes 44. Through holes 11 for the screws 10 to pass through are formed on the middle ring plate 52 of the first buffer damping ring 5, the clamping chuck 61 of the first clamping chuck assembly 6, the middle ring plate 52 of the second buffer damping ring 7, and the clamping chuck 61 of the second clamping chuck assembly 8, facilitating subsequent installation. The right end of the screw 10 is locked by a nut 12.

[0033] The installation principle of the fixture in this embodiment is as follows: Screw the screw 10 into the threaded hole 44 of the guiding cone head 4, then sequentially sleeved with the first buffer damping ring 5, the first clamping chuck assembly 6, the second buffer damping ring 7, and the second clamping chuck assembly 8 along the screw 10, and then screw the nut 12 onto the screw 10 for preliminary installation of the fixture;

[0034] Then sleeved the outer sheath 3 on the submarine cable 1, sleeved the preliminarily installed fixture on the outer sheath 3, and then fixed the two semi-circular chucks 41 by the third bolt 43 to clamp the outer sheath 3 and the submarine cable 1 tightly, and fixed the four clamping chucks 61 of the first clamping chuck assembly 6 and the four clamping chucks 61 of the second clamping chuck assembly 8 by the first bolt 63 to clamp the outer sheath 3 and the submarine cable 1 tightly;

[0035] Finally, pass the submarine cable 1 through the bellmouth protection pipe 2, so that the guiding cone head 4 is stuck on the inner wall of the middle conical part 21 of the bellmouth protection pipe 2 to complete the preliminary fixation. Finally, tighten the nut 12 so that the nut 12 squeezes the right side surface of the clamping jaw 61 of the second clamping jaw assembly 8, thereby squeezing the outer annular platform 53 of the second buffer damping ring 7 to make it deform and bulge, so that it can be clamped on the inner wall of the bellmouth protection pipe 2; at the same time, squeeze the right side surface of the clamping jaw 61 of the first clamping jaw assembly 6, thereby squeezing the outer annular platform 53 of the first buffer damping ring 5 to make it deform and bulge, so that it can be clamped on the inner wall of the bellmouth protection pipe 2 to complete the further fixation, thus completing the installation of the fixture.

[0036] This fixture can tightly hold and hoop the submarine cable 1 to prevent the fixture from loosening, and can better limit the bellmouth protection pipe 2 on the submarine cable 1 through the first buffer damping ring 5 and the second buffer damping ring 7.

[0037] It should be noted that the installation principle of the above fixture is to enable those skilled in the art to better understand the technology of the present utility model, and the present utility model does not protect this.

[0038] In an embodiment of the present utility model, a sleeve 13 is sleeved on the right end of the screw rod 10, and the nut 12 is located on the right side surface of the sleeve 13. Through the sleeve 13, the fastening position of the nut 12 can be shifted to the right, so that the fastening operation space of the nut 12 is located outside the bellmouth protection pipe 2, facilitating the fastening operation.

[0039] In this embodiment, the nut 12 can be set as a double nut or fastened with a lock washer to ensure that it will not loosen after fastening.

[0040] As Figure 5 shown, in an embodiment of the present utility model, two inner tightening rings 14 are respectively sleeved on the outer sheath 3 inside the first clamping jaw assembly 6 and the second clamping jaw assembly 8, and annular placement grooves 15 for placing the inner tightening rings 14 are formed on the clamping jaws 61 of the first clamping jaw assembly 6 and the clamping jaws 61 of the second clamping jaw assembly 8. Through the inner tightening rings 14, it can be prevented that when the clamping jaws 61 tightly hold and squeeze the submarine cable 1, the local extrusion force on the submarine cable 1 is too large and causes damage.

[0041] In an embodiment of the present utility model, the guiding cone head 4 is made of stainless steel to prevent the guiding cone head 4 from rusting in seawater.

[0042] In an embodiment of the present utility model, the first buffer damping ring 5, the second buffer damping ring 7, the outer sheath 3, and the inner tightening rings 14 are all formed by casting polyurethane elastomer, which can better play a buffering role.

[0043] In an embodiment of the present utility model, the clamping slip 61 is made of stainless steel to prevent the clamping slip 61 from rusting in seawater.

[0044] The above are only the preferred embodiments of the present utility model, and should not be construed as limiting the present application. Any equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the present utility model.

Claims

1. A submarine cable horn center clamp, characterized in that: The clamp is arranged between the submarine cable and the bell-mouth protective tube, the submarine cable is provided with an outer sheath, and the clamp comprises a guide cone head, a first buffer damping ring, a first clamping slip assembly, a second buffer damping ring, and a second clamping slip assembly which are arranged on the outer sheath from left to right in sequence; the outer walls of the first buffer damping ring and the second buffer damping ring are tightly attached to the inner wall of the bell-mouth protective tube.

2. A submarine cable flare center clamp according to claim 1, characterized in that: The first buffer damping ring has the same structure as the second buffer damping ring; the first buffer damping ring includes an inner retaining ring platform, an intermediate ring plate and an outer annular platform, and the guide cone head, the first clamping cava assembly and the second clamping cava assembly are all provided with an annular groove for embedding the inner retaining ring platform.

3. A submarine cable flare center fixture according to claim 2, characterized in that: The guide cone head includes two semicircular clamps, and the annular clamping groove is arranged on the right side of the semicircular clamp; a plurality of third countersunk holes are arranged on the semicircular clamp, and the two corresponding third countersunk holes on the two semicircular clamps are connected by a third bolt.

4. A submarine cable flare center fixture according to claim 3, characterized in that: The structure of the first clamping cava assembly is the same as that of the second clamping cava assembly; the first clamping cava assembly includes four clamping cava, and the annular groove is opened on the left and right sides of the clamping cava; a plurality of first countersunk holes are opened on the clamping cava, and the two corresponding first countersunk holes on the clamping cava are connected by a first bolt; the annular groove is opened on the left side of the clamping cava of the second clamping cava assembly.

5. A submarine cable flare center fixture according to claim 4, characterized in that: A plurality of threaded holes are circumferentially provided on the right side surface of the semicircular chuck, and screws are threaded into the threaded holes. Through holes for the screws to pass through are provided on the intermediate ring plate of the first buffer damping ring, the clamping cava of the first clamping cava assembly, the intermediate ring plate of the second buffer damping ring, and the clamping cava of the second clamping cava assembly, and the right end of the screw is locked by a nut.

6. A submarine cable flare center fixture according to claim 5, characterized in that: The right end of the screw rod is sleeved with a sleeve, and the nut is located on the right side of the sleeve.

7. A submarine cable flare center fixture according to claim 4, characterized in that: Two inner clamping rings are respectively sleeved on the inner sides of the first clamping slip assembly and the second clamping slip assembly on the outer sheath, and annular placement grooves for placing the inner clamping rings are provided on the clamping slips of the first clamping slip assembly and the clamping slips of the second clamping slip assembly.

8. A submarine cable flare center fixture according to claim 1, characterized in that: The guide cone head is made of stainless steel.

9. A submarine cable flare center fixture according to claim 7, characterized in that: The first buffer damping ring, the second buffer damping ring, the outer sheath and the inner clamping ring are all cast and molded by polyurethane elastomer.

10. A submarine cable flare center fixture according to claim 4, characterized in that: The clamping slips are made of stainless steel.

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