A gravity triggered umbilical shearing device for underwater vehicle

Abstract

The application discloses a kind of umbilical cable gravity trigger shearing device for underwater working submersible, it is related to underwater operation equipment field, including: submersible shell and fixed in the top of submersible shell umbilical cable, the connecting place of umbilical cable with submersible shell is provided with recess, recess is provided with hinged seat above, and hinged seat is provided with hinged box body by pin shaft hinged assembly above, pin shaft is fixedly assembled with hinged seat, hinged box body is rotatably arranged on the surface of pin shaft, the upper end surface of submersible shell is hinged and assembled in the end of hinged seat away from pin shaft, hinged seat is located above recess, in the application, when submersible cannot move and umbilical cable is pulled, hinged seat and hinged box body will be unfolded by trigger unit, it will trigger shearing unit after unfolding to a certain extent, by shearing unit, umbilical cable can be quickly cut off and handled, to avoid umbilical cable being forcibly torn and broken, effectively reduce the overall damage rate of umbilical.

Description

Technical Field

[0001] This invention relates to the field of underwater operation equipment, specifically to a gravity-triggered shearing device for the umbilical cable of an underwater submersible. Background Technology

[0002] When a submersible is engaged in underwater salvage, search, or seabed construction operations, it establishes a connection with the surface mother ship via an umbilical cable. The umbilical cable is a multi-functional integrated transmission channel combining power transmission, signal communication, hydraulic fluid transport, and mechanical tensile strength. During underwater operations, the submersible faces the risk of becoming entangled and stuck by obstacles such as reefs, subsea pipelines, and abandoned fishing nets. If the ship's winch is retrieving the cable or the ship is drifting on the surface while the submersible is stuck and unable to move, the umbilical cable will be subjected to continuously increasing axial tensile force. When the tensile force exceeds the safe bearing limit of the umbilical cable or the submersible, it may damage the connection between the umbilical cable and the submersible, rendering the submersible unable to operate normally underwater.

[0003] To preserve the valuable submersible itself, an emergency disconnection device (also known as a trigger-activated shearing device) is typically installed at the connection point between the umbilical cable and the submersible. This device is pre-calibrated to trigger a tensile force threshold. When the tension in the umbilical cable reaches the set threshold, the device automatically triggers a shearing action, severing the umbilical cable at its base, separating the submersible from the umbilical cable and the mother ship. Subsequently, the submersible uses its own emergency buoyancy system to rise to the surface, achieving self-rescue by detaching from the cable. Actively disconnecting the umbilical cable ensures that the submersible has sufficient power to rise, guaranteeing safety (this is a controlled and safe disconnection). However, if the umbilical cable is passively and forcibly torn apart, it will cause extensive internal structural damage. As the tension continues to increase, the outer steel wires will break one by one, the wires will spread out, and the armor several meters upstream and downstream of the break point will experience permanent elongation, slippage, and misalignment. The entire section will be rendered unusable due to its tensile strength. The copper conductors will be stretched and thinned, resulting in excessive resistance. The optical fibers will be stretched, causing micro-bending losses or even segmental silent breaks, resulting in enormous losses.

[0004] However, commonly used cutting devices mostly rely on hydraulic drive, electronic triggering, or shearing fracture, which pose reliability risks in deep-sea environments such as hydraulic seal failure and electrical component leakage and short circuits. Furthermore, some devices rely on remote signal triggering from the water surface and cannot operate autonomously when umbilical communication is interrupted. Summary of the Invention

[0005] The purpose of this invention is to provide a gravity-triggered shearing device for umbilical cables of underwater submersibles to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gravity-triggered shearing device for an umbilical cable of an underwater submersible, comprising: a submersible shell and an umbilical cable fixed to the top of the submersible shell, a recessed portion provided at the connection between the umbilical cable and the submersible shell, a hinge seat provided above the recessed portion, and a hinge box body hinged above the hinge seat by a pin, the pin and the hinge seat being fixedly assembled, the hinge box body being rotatably sleeved on the surface of the pin, one end of the hinge seat away from the pin being hinged to the upper end face of the submersible shell, the hinge seat being located above the recessed portion, and the hinge seat being swingable and extending into the recessed portion, the umbilical cable passing through the interior of the hinge seat and the hinge box body; It also includes: a cutting unit for cutting the umbilical cable, the cutting unit being disposed inside the hinge box; A triggering unit is used to actively activate the shearing unit before the umbilical cable is pulled and broken. The triggering unit is disposed between the hinge seat and the hinge box. The shearing unit includes a blade sleeve block located inside the hinge box, and the blade sleeve block is fixed to the side of the hinge box away from the pin. The umbilical cable passes through the middle of the blade sleeve block. The interior of the hinge box has an upper through hole and a lower through hole for the umbilical cable to pass through. The umbilical cable is fixedly assembled with the lower through hole and the umbilical cable is fixedly assembled with the hinge seat. Two cutting blades are slidably assembled inside the blade sleeve block, and the two cutting blades are staggered vertically. A moving part is also provided between the two cutting blades.

[0007] Preferably, the umbilical cable is provided with two bent retention portions, which are located between the hinge seat and the lower through hole, and between the hinge seat and the recess.

[0008] Preferably, the moving component includes an extension plate fixed to the side of the blade sleeve block near the pin shaft. A first positioning pin is fixedly provided on the upper end face of the extension plate, and a first connecting arm arranged in a cross-stacked manner is rotatably mounted on the outer surface of the first positioning pin. A connecting post is fixedly provided on the upper end face of each cutter. A waist-shaped groove is opened on the side of each first connecting arm near the cutter. The connecting post located on the same side is slidably inserted into the waist-shaped groove. A straight groove is opened at the end of the extension plate away from the blade sleeve block, and the straight groove is parallel to the extension plate. The extension line of the extension plate contacts the axis of the first positioning pin. A second positioning pin is slidably provided inside the straight groove. The sliding direction of the second positioning pin is parallel to the extension plate. A second connecting arm is hingedly mounted between the end of each first connecting arm away from the connecting post and the second positioning pin.

[0009] Preferably, a sliding rod is fixedly inserted inside the blade sleeve block, and the sliding rod slides through the two cutting blades. A third spring is sleeved on the outer surface of the sliding rod, and the two ends of the third spring are respectively fixed to the two cutting blades.

[0010] Preferably, the triggering unit includes a guide frame fixed inside the hinge box, and the guide frame is located on the side of the extension plate away from the blade sleeve block. An insert is slidably fitted inside the guide frame, and the sliding direction of the insert is parallel to the extension plate. One end of the guide frame near the blade sleeve block is closed, and the other end is open. A contact rod is fixedly provided at one end of the insert near the blade sleeve block, and the contact rod is located above the extension plate. A second spring is fixedly provided between the one end of the insert near the blade sleeve block and the guide frame, and the second spring is distributed outside the contact rod. A plurality of ratchet grooves are provided on the lower end face of the contact rod in a straight line and equidistantly. A T-shaped block is elastically rotatably fitted on the top of the second positioning pin through a pin and a torsion spring, and the T-shaped block is movably engaged with the ratchet groove. A transmission assembly is provided between the insert and the pin.

[0011] Preferably, the transmission assembly includes a third gear fixedly sleeved on the outer surface of the pin shaft, and the third gear is located inside the hinge box. A rotating shaft is rotatably mounted inside the hinge box, and a first gear is fixedly sleeved on the outer surface of the rotating shaft. A second gear is meshed between the first gear and the third gear, and the second gear is rotatably assembled inside the hinge box. A first missing gear is fixedly provided at both ends of the first gear, and the outer diameter of the first missing gear is larger than the outer diameter of the first gear. Two racks parallel to the contact rod are fixedly provided at the bottom of the insert, and the racks are movably meshed with the two first missing gears respectively.

[0012] Preferably, the maximum value of the reaction force generated by the rotation of the first missing gear driving the rack and the insert to compress the second spring is F1, the force threshold for the umbilical cable to be pulled and broken is F2, and the force for the umbilical cable to be cut by the two cutters is F3, where F2 > F1 > F3.

[0013] Preferably, the outer surface of the guide frame is provided with a plurality of grooves parallel to the contact rod, and the end face of the insert away from the contact rod is cone-shaped. When the insert moves rapidly to reset, the seawater resistance experienced by the insert can be reduced by the cone-shaped end face and the grooves. Compared with the planar end face, the resistance experienced during reset is smaller.

[0014] Preferably, an n-shaped closing plate is slidably fitted onto the outside of the hinge box. The closing plate is distributed on the front and rear end faces and the right end face of the hinge box. Multiple second opening slots are formed on the three faces of the hinge box that contact the closing plate. Multiple first opening slots with the same size as the second opening slots are formed on the three faces of the closing plate. The closing plate closes and blocks the second opening slots. Two symmetrically distributed limiting sleeves are fixedly installed on the outer wall of the closing plate. A first slider is slidably fitted inside the limiting sleeve. The axis of the first slider is perpendicular to the closing plate. A connecting rod that slides through the limiting sleeve is fixedly installed on the upper end face of the first slider and is fixed to the hinge box. A tension spring is fixed between the upper end face of the first slider and the limiting sleeve. A positioning component that limits the closing plate is provided on the outer wall of the hinge box.

[0015] Preferably, the positioning component includes a transverse stop fixed to the outside of the closed plate, a retaining rod fixedly disposed on the outside of the hinge box, and a locking block slidably mounted on the outside of the retaining rod, with the end of the locking block abutting above the locking block. A second slider is fixedly disposed on the end of the retaining rod near the stop, and the second slider is also slidably mounted inside the locking block. A first spring is fixedly disposed between the end of the second slider away from the retaining rod and the locking block. The rotating shaft extends out of the hinge box, and a second missing gear is fixedly disposed on the outer surface of the rotating shaft. The second missing gear is the same size as the first missing gear. A lever for pushing the locking block is fixedly disposed on the outer surface of the second missing gear, and the lever is located at the rightmost meshing tooth of the second missing gear surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, when the submersible is unable to move and the umbilical cable is being pulled, the triggering unit will cause the hinge seat and hinge box to unfold. After unfolding to a certain extent, the shearing unit will be triggered. The shearing unit can quickly cut the umbilical cable, thereby preventing the umbilical cable from being forcibly torn and pulled off, and effectively reducing the overall damage rate of the umbilical cable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the hinge base and hinge box structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the limiting sleeve block of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5This is a schematic diagram of the first and second opening grooves of the present invention; Figure 6 This is a schematic diagram of the internal structure of the hinged box of the present invention; Figure 7 This is a schematic diagram of the first and second missing gear structures of the present invention; Figure 8 This is a schematic diagram of the internal structure of the guide frame of the present invention; Figure 9 For the present invention Figure 8 Enlarged view at point B in the middle; Figure 10 This is a schematic diagram of the slide bar and the third spring structure of the present invention; Figure 11 This is a schematic diagram of the insert and groove structure of the present invention.

[0018] In the diagram: 1. Submersible hull; 2. Umbilical cable; 3. Hinge seat; 4. Hinge box; 5. Pin; 6. Enclosure plate; 7. First opening slot; 8. Second opening slot; 9. Limiting sleeve; 10. Connecting rod; 11. First slider; 12. Tension spring; 13. Abutment block; 14. Holding rod; 15. Locking block; 16. Second slider; 17. First spring; 18. Rotating shaft; 19. First missing gear; 20. First gear; 21. Second gear; 22. ... 23. Third gear; 24. Second missing gear; 25. Lever; 26. Guide frame; 27. Insert; 28. Rack; 29. ​​Second spring; 30. Contact rod; 31. Blade sleeve block; 32. First locating pin; 33. First connecting arm; 34. Second connecting arm; 35. Second locating pin; 36. T-block; 37. Racket groove; 38. Extension plate; 39. Waist-shaped groove; 40. Cutting blade; 41. Connecting post; 42. Slide rod; 43. Third spring; 44. Groove bar. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1-11The figure shows a gravity-triggered shearing device for an umbilical cable used in an underwater submersible, comprising: a submersible shell 1 and an umbilical cable 2 fixed to the top of the submersible shell 1. A recess is provided at the connection between the umbilical cable 2 and the submersible shell 1. A hinge seat 3 is provided above the recess, and a hinge box 4 is hinged to the top of the hinge seat 3 via a pin 5. The pin 5 and the hinge seat 3 are fixedly assembled. The hinge box 4 is rotatably sleeved on the surface of the pin 5. The end of the hinge seat 3 away from the pin 5 is hinged to the upper end face of the submersible shell 1. The hinge seat 3 is located above the recess, and the hinge seat 3 can swing and extend into the recess. The umbilical cable 2 passes through the interior of the hinge seat 3 and the hinge box 4. It also includes: a cutting unit for cutting the umbilical cable 2, the cutting unit being disposed inside the hinge box 4; The triggering unit is used to actively trigger the shearing unit before the umbilical cable 2 is pulled and broken. The triggering unit is located between the hinge seat 3 and the hinge box 4. The cutting unit includes a blade sleeve block 30 located inside the hinge box 4, and the blade sleeve block 30 is fixed on the side of the hinge box 4 away from the pin 5. The umbilical cable 2 passes through the middle of the blade sleeve block 30. The interior of the hinge box 4 is provided with an upper through hole and a lower through hole for the umbilical cable 2 to pass through. The umbilical cable 2 is fixedly assembled with the lower through hole and the umbilical cable 2 is fixedly assembled with the hinge seat 3. The blade sleeve block 30 has two cutting blades 39 that are relatively distributed inside it and are arranged vertically and alternately. A moving part is also provided between the two cutting blades 39. When the two cutting blades 39 move closer to each other, the cutting edges of the two cutting blades 39 can cut the umbilical cable 2.

[0021] The umbilical cable 2 is provided with two bending retention parts, which are located between the hinge seat 3 and the lower through hole, and between the hinge seat 3 and the recess, respectively. The function of the bending retention parts is to extend the bending retention parts when the hinge seat 3 is unfolded with the hinge box 4, or when the hinge seat 3 is folded on the upper end face of the submersible shell 1.

[0022] The moving component includes an extension plate 37 fixed to the side of the blade sleeve block 30 near the pin 5. A first positioning pin 31 is fixedly provided on the upper end face of the extension plate 37, and a first connecting arm 32 arranged in a cross-stacked manner is rotatably mounted on the outer surface of the first positioning pin 31. A connecting post 40 is fixedly provided on the upper end face of each cutter 39. A waist-shaped groove 38 is opened on the side of each first connecting arm 32 near the cutter 39. The connecting post 40 on the same side is slidably inserted into the inside of the waist-shaped groove 38. A straight groove is opened on the end of the extension plate 37 away from the blade sleeve block 30, and the straight groove is parallel to the extension plate 37. The extension line of 7 contacts the axis of the first positioning pin 31. The second positioning pin 34 is slidably arranged inside the straight groove. The sliding direction of the second positioning pin 34 is parallel to that of the extension plate 37. The end of each first connecting arm 32 away from the connecting post 40 is hinged to the second positioning pin 34 with a second connecting arm 33. When the second positioning pin 34 moves away from the blade sleeve block 30, the first connecting arm 32 can be pulled by the second connecting arm 33, thereby clamping the two first connecting arms 32. During the clamping process, the two cutters 39 can move towards each other through the cooperation of the waist-shaped groove 38 and the connecting post 40.

[0023] A slide rod 41 is fixedly inserted inside the blade holder block 30, and the slide rod 41 slides through the two cutters 39. A third spring 42 is sleeved on the outer surface of the slide rod 41, and the two ends of the third spring 42 are fixed to the two cutters 39 respectively. The third spring 42 is a light spring, which is only used to keep the two cutters 39 located on both sides inside the blade holder block 30 when they are not subjected to other external forces, and to keep the second positioning pin 34 located at the end of the straight groove away from the pin shaft 5.

[0024] The triggering unit includes a guide frame 25 fixed inside the hinge box 4, and the guide frame 25 is located on the side of the extension plate 37 away from the blade sleeve block 30. An insert 26 is slidably fitted inside the guide frame 25, and the sliding direction of the insert 26 is parallel to the extension plate 37. One end of the guide frame 25 near the blade sleeve block 30 is closed, and the other end is open. A contact rod 29 is fixedly installed at one end of the insert 26 near the blade sleeve block 30, and the contact rod 29 is located above the extension plate 37. A second spring 28 is fixedly installed between the end of the insert 26 near the blade sleeve block 30 and the guide frame 25, and the second spring 28 is distributed outside the contact rod 29. Several ratchet grooves 36 are equidistantly distributed in a straight line on the lower end face of the contact rod 29. The top of the second positioning pin 34 passes through... A T-block 35 is elastically rotatably fitted with a pin and a torsion spring, and the T-block 35 is movably engaged with a ratchet groove 36. A transmission component is provided between the insert 26 and the pin 5. The pin is fixed inside the T-block 35, and the two ends of the torsion spring are respectively fixed to the T-block 35 and the second positioning pin 34. The T-block 35 can be kept in a vertical state by the elastic force of the torsion spring. When the contact rod 29 pushes the T-block 35, the T-block 35 can elastically deflect towards one side of the blade sleeve block 30 and then engage with the ratchet groove 36. However, when the contact rod 29 moves back to its original position, the ratchet groove 36 will move back to its original position along with the T-block 35 and the second positioning pin 34, moving away from the blade sleeve block 30, so that the two cutters 39 move closer to each other to cut the umbilical cable 2.

[0025] The transmission assembly includes a third gear 22 fixedly sleeved on the outer surface of the pin 5, and the third gear 22 is located inside the hinge box 4. A rotating shaft 18 is rotatably mounted inside the hinge box 4, and a first gear 20 is fixedly sleeved on the outer surface of the rotating shaft 18. A second gear 21 meshes between the first gear 20 and the third gear 22, and the second gear 21 is rotatably mounted inside the hinge box 4. First missing gears 19 are fixedly mounted at both ends of the first gear 20, and the outer diameter of the first missing gears 19 is larger than the outer diameter of the first gear 20. Two racks 27 parallel to the contact rod 29 are fixedly mounted at the bottom of the insert 26. The rack 27 is movably engaged with the two first missing gears 19 respectively. Since the pin 5, the third gear 22 and the hinge seat 3 are in a relatively fixed state, when the hinge box 4 rotates through the pin 5, the first missing gear 19 can be engaged with the rack 27 through the transmission of the second gear 21 and the first gear 20, pushing the insert 26 towards the blade sleeve block 30 to compress the second spring 28. At this time, the second spring 28 begins to generate elastic potential energy. When the first missing gear 19 continues to rotate, the teeth on its surface separate from the rack 27, and the reaction force of the second spring 28 will quickly bring the insert 26 back to its original position.

[0026] The maximum value of the reaction force generated by the rotation of the first missing gear 19 driving the rack 27 and the insert 26 to compress the second spring 28 is F1. The force threshold for the umbilical cable 2 to be pulled and broken is F2. The force of the umbilical cable 2 being cut by the two cutters 39 is F3. F2 > F1 > F3. When the pulling force between the umbilical cable 2 and the submersible hull 1 is close to F2, the compressed second spring 28 will be released in advance. By pulling the T-block 35 and the second connecting arm 33 through the contact rod 29, the first connecting arm 32 can cut the umbilical cable 2 with the two cutters 39 in a scissor-like manner.

[0027] Example 2: Please refer to Figure 11 This embodiment is a further explanation of the above embodiment one. The outer surface of the guide frame 25 is provided with a plurality of grooves 43 parallel to the contact rod 29. The end face of the insert 26 away from the contact rod 29 is cone-shaped. When the insert 26 moves quickly to reset, the seawater resistance experienced by the insert 26 can be reduced by the cone-shaped end face and the grooves 43. Compared with the planar end face, the resistance experienced during reset is smaller.

[0028] Example 3: Please refer to Figures 3-5 This embodiment is a further explanation of the above embodiment. An n-shaped closing plate 6 is slidably fitted onto the outside of the hinged box 4. The closing plate 6 is distributed on the front and rear end faces and the right end face of the hinged box 4. Multiple second opening slots 8 are formed on the three surfaces of the hinged box 4 that contact the closing plate 6. Multiple first opening slots 7, with the same size as the second opening slots 8, are formed on the three surfaces of the closing plate 6. The closing plate 6 acts as a sealing and shielding element for the second opening slots 8. Two symmetrically distributed limiting sleeves 9 are fixedly installed on the outer wall of the closing plate 6, and a first slider 11 is slidably fitted inside the limiting sleeves 9. The axis of the first slider 11 is perpendicular to the closing plate 6. The upper end of the first slider 11... A connecting rod 10, which slides through the limiting sleeve 9, is fixedly installed on the surface of the hinged box 4. A tension spring 12 is fixedly installed between the upper end face of the first slider 11 and the limiting sleeve 9. A positioning component is installed on the outer wall of the hinged box 4 to limit the closing plate 6. The positioning component keeps the tension spring 12 in a stretched state, at which point the closing plate 6 completely closes and blocks the second opening slot 8. When the positioning component releases the restriction on the closing plate 6, the elastic force of the tension spring 12 causes the closing plate 6 to move upward a certain distance. After moving upward, the first opening slot 7 and the second opening slot 8 coincide, allowing seawater to flow freely inside and outside the hinged box 4.

[0029] The positioning assembly includes a transverse stop 13 fixed to the outside of the closed plate 6. A retaining rod 14 is fixedly installed on the outside of the hinged box 4, and a locking block 15 is slidably mounted on the outside of the retaining rod 14. The end of the locking block 15 abuts against the top of the locking block 15. A second slider 16 is fixedly installed on the end of the retaining rod 14 near the stop 13. The second slider 16 is also slidably mounted inside the locking block 15. A first spring 17 is fixedly installed between the end of the second slider 16 away from the retaining rod 14 and the locking block 15. That is, the elastic pressure of the first spring 17 can make the locking block 15 stably lock the stop 13, preventing the closed plate 6 from sliding upward. The pivot 18 extends out of the hinge. The outer surface of the housing 4 and the rotating shaft 18 is fixedly provided with a second missing gear 23. The second missing gear 23 is the same size as the first missing gear 19, and the orientation and distribution of the teeth are the same. The outer surface of the second missing gear 23 is fixedly provided with a lever 24 for pushing the locking block 15. The lever 24 is located at the rightmost tooth on the surface of the second missing gear 23. That is, only when the teeth of the first missing gear 19 are about to separate from the rack 27 during rotation will the lever 24 on the surface of the second missing gear 23 push the locking block 15 in advance, no longer limiting the stop block 13, so that the second opening slot 8 can be opened in advance before the insert block 26 is reset.

[0030] Working principle: During underwater operations, if the submersible and umbilical cable 2 become stuck on seabed reefs or fishing gear, and if the vessel on the surface drifts or a reel winds up the umbilical cable 2, the umbilical cable 2 will be pulled. The submersible will be unable to move. During this pulling process, the hinge box 4 and hinge seat 3 will first undergo a hinge deflection action, meaning the umbilical cable 2 and hinge seat 3 will unfold due to the pulling force on the umbilical cable 2. (Refer to...) Figure 8At this time, the action of the third gear 22 and the second gear 21 allows the first gear 20 and the first missing gear 19 to rotate counterclockwise inside the hinge box 4. Through the meshing of the first missing gear 19 with the rack 27, the rack 27 and the insert 26 can move towards the blade sleeve block 30. During this process, the second spring 28 will be compressed. During the movement of the insert 26, the contact rod 29 will also be displaced above the second positioning pin 34. As the pulling force on the umbilical cable 2 gradually increases, in order to prevent the umbilical cable 2 from being forcibly pulled off, the surface teeth of the first missing gear 19 will separate from the rack 27 as it continues to rotate. The compressed second spring 28 generates a huge reaction force, which allows the insert 26 and the contact rod 29 to move quickly. Upon reset, the ratchet groove 36 inside the contact rod 29 engages the T-block 35 and moves the second positioning pin 34 simultaneously. During this process, the second positioning pin 34 is pulled forcefully. Through the action of the second connecting arm 33 and the first connecting arm 32, the two cutters 39 can quickly approach each other, and their blades will simultaneously cut the umbilical cable 2. The reaction force of the compressed second spring 28 quickly cuts the umbilical cable 2, and the cut end of the umbilical cable 2 is pulled directly out from the top of the hinge box 4. By mechanically triggering the umbilical cable 2, it actively cuts the umbilical cable 2 before it is forcibly pulled off, effectively preventing large-scale structural damage to the internal communication or circuit when the umbilical cable 2 is forcibly torn off.

[0031] In this scheme, when the first connecting arm 32 swings and the cutter 39 cuts the umbilical cable 2, as the distance between the two cutters 39 becomes smaller, the connecting post 40 will get closer and closer to the first positioning pin 31. That is, during the cutting process of the cutter 39 cutting the umbilical cable 2, through the lever principle, with the first positioning pin 31 as the fulcrum, the power arm of the first connecting arm 32 is much longer than the resistance arm of the first connecting arm 32, which can play a force-increasing effect. The shearing force applied by the two cutters 39 to the umbilical cable 2 is greater than the clamping force applied by the second connecting arm 33 to the first connecting arm 32. Through the lever effect, it is further ensured that the cutter 39 can effectively cut the umbilical cable 2.

[0032] refer to Figure 3 , Figure 4 , Figure 7 and Figure 8It is important to note that when the first missing gear 19 is about to separate from the rack 27, the second missing gear 23 will first push the locking block 15 through the lever 24. After the locking block 15 retracts, it will no longer limit the stop block 13. At this time, the elastic force generated by the tension spring 12 can make the sealing plate 6 move upward, so that the first opening slot 7 and the second opening slot 8 coincide. At this time, several second opening slots 8 on the surface of the hinge box 4 are in a transparent state, and seawater can flow more smoothly inside and outside the hinge box 4 through the second opening slots 8. When the insert 26 moves under the elastic reset of the second spring 28, the insert 26 can better push the seawater in the hinge box 4, thereby reducing the resistance when the insert 26 is reset, that is, ensuring that the reaction force generated after the second spring 28 is compressed can be transmitted to the two cutters 39 to cut the umbilical cable 2 to the maximum extent.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gravity-triggered shearing device for the umbilical cable of an underwater submersible, characterized in that, include: The submersible hull (1) and the umbilical cable (2) fixed on the top of the submersible hull (1) are provided with a recessed part at the connection between the umbilical cable (2) and the submersible hull (1). A hinge seat (3) is provided above the recessed part, and a hinge box (4) is hinged to the top of the hinge seat (3) by a pin (5). The pin (5) and the hinge seat (3) are fixedly assembled. The hinge box (4) is rotatably sleeved on the surface of the pin (5). The end of the hinge seat (3) away from the pin (5) is hinged to the upper end face of the submersible hull (1). The umbilical cable (2) passes through the interior of the hinge seat (3) and the hinge box (4). Also includes: A cutting unit is used to cut the umbilical cable (2), and the cutting unit is disposed inside the hinge box (4); A triggering unit is used to actively trigger the shearing unit before the umbilical cable (2) is pulled and broken. The triggering unit is located between the hinge seat (3) and the hinge box (4). The shearing unit includes a blade sleeve block (30) located inside the hinge box (4), and the blade sleeve block (30) is fixed on the side of the hinge box (4) away from the pin (5). The umbilical cable (2) passes through the middle of the blade sleeve block (30). The interior of the hinge box (4) is provided with an upper through hole and a lower through hole for the umbilical cable (2) to pass through. The umbilical cable (2) is fixedly assembled with the lower through hole, and the umbilical cable (2) is fixedly assembled with the hinge seat (3). The interior of the blade sleeve block (30) is slidably equipped with two cutting blades (39) that are distributed opposite to each other. A moving part is also provided between the two cutting blades (39).

2. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 1, characterized in that: The umbilical cable (2) is provided with two curved retention parts, which are located between the hinge seat (3) and the lower through hole, and between the hinge seat (3) and the recess.

3. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 1, characterized in that: The moving component includes an extension plate (37) fixed to the side of the blade sleeve block (30) near the pin (5). A first positioning pin (31) is fixedly provided on the upper end surface of the extension plate (37), and a first connecting arm (32) is rotatably mounted on the outer surface of the first positioning pin (31) in a cross-stacked arrangement. A connecting post (40) is fixedly provided on the upper end surface of each cutter (39). A waist-shaped groove (38) is provided on the side of each first connecting arm (32) near the cutter (39). The connecting post (40) on the same side is slidably inserted into the waist-shaped groove (38). A straight groove is provided at the end of the extension plate (37) away from the blade sleeve block (30). A second positioning pin (34) is slidably provided inside the straight groove. A second connecting arm (33) is hingedly mounted between the end of each first connecting arm (32) away from the connecting post (40) and the second positioning pin (34).

4. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 3, characterized in that: The blade sleeve block (30) is internally fitted with a slide rod (41), which slides through the two cutters (39). A third spring (42) is sleeved on the outer surface of the slide rod (41), and the two ends of the third spring (42) are respectively fixed to the two cutters (39).

5. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 3, characterized in that: The triggering unit includes a guide frame (25) fixed inside the hinge box (4), and the guide frame (25) is located on the side of the extension plate (37) away from the blade sleeve block (30). An insert (26) is slidably installed inside the guide frame (25). A contact rod (29) is fixedly provided at one end of the insert (26) near the blade sleeve block (30). A second spring (28) is fixedly provided between the end of the insert (26) near the blade sleeve block (30) and the guide frame (25). A plurality of ratchet grooves (36) are provided on the lower end face of the contact rod (29). A T-shaped block (35) is elastically rotated on the top of the second positioning pin (34) through a pin and a torsion spring. The T-shaped block (35) is movably engaged with the ratchet groove (36). A transmission component is provided between the insert (26) and the pin (5).

6. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 5, characterized in that: The transmission assembly includes a third gear (22) fixedly sleeved on the outer surface of the pin (5), and the third gear (22) is located inside the hinge box (4). The hinge box (4) is rotatably mounted on a rotating shaft (18), and a first gear (20) is fixedly sleeved on the outer surface of the rotating shaft (18). A second gear (21) meshes between the first gear (20) and the third gear (22), and the second gear (21) is rotatably assembled inside the hinge box (4). A first missing gear (19) is fixedly provided at both ends of the first gear (20). The outer diameter of the first missing gear (19) is larger than the outer diameter of the first gear (20). Two racks (27) are fixedly provided at the bottom of the insert (26), and the racks (27) are movably meshed with the two first missing gears (19) respectively.

7. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 6, characterized in that: The maximum value of the reaction force generated by the first missing gear (19) rotating and driving the rack (27) and the insert (26) to compress the second spring (28) is F1, the force threshold for the umbilical cable (2) to be pulled and broken is F2, and the force for the umbilical cable (2) to be cut by the two cutters (39) is F3, F2>F1>F3.

8. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 5, characterized in that: The outer surface of the guide frame (25) is provided with a number of grooves (43) parallel to the contact rod (29). The end face of the insert (26) away from the contact rod (29) is cone-shaped. When the insert (26) moves quickly to reset, the seawater resistance experienced by the insert (26) can be reduced by the cone-shaped end face and the grooves (43). Compared with the planar end face, the resistance experienced during reset is smaller.

9. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 8, characterized in that: The hinge box (4) is slidably fitted with an n-shaped closed plate (6). Multiple second opening slots (8) are provided on the three surfaces of the hinge box (4) that are in contact with the closed plate (6). Multiple first opening slots (7) with the same size as the second opening slots (8) are provided on the three surfaces of the closed plate (6). The closed plate (6) acts as a closed shield for the second opening slots (8). Two symmetrically distributed limiting sleeves (9) are fixedly provided on the outer wall of the closed plate (6). A first slider (11) is slidably fitted inside the limiting sleeves (9). A connecting rod (10) is fixedly provided on the upper end face of the first slider (11). The connecting rod (10) is fixed to the hinge box (4). A tension spring (12) is fixedly provided between the upper end face of the first slider (11) and the limiting sleeves (9). A positioning component that limits the closing plate (6) is provided on the outer wall of the hinge box (4).

10. The umbilical cable gravity-triggered shearing device for underwater submersibles according to claim 9, characterized in that: The positioning assembly includes a transverse abutment (13) fixed to the outside of the closed plate (6), a retaining rod (14) fixedly provided on the outside of the hinge box (4), and a locking block (15) slidably mounted on the outside of the retaining rod (14), and the end of the locking block (15) abuts against the top of the locking block (15). A second slider (16) is fixedly provided at one end of the retaining rod (14) near the abutment (13), and a first spring (17) is fixedly provided between the end of the second slider (16) away from the retaining rod (14) and the locking block (15). A second missing gear (23) is fixedly provided on the outer surface of the rotating shaft (18). The second missing gear (23) is the same size as the first missing gear (19). A lever (24) for pushing the locking block (15) is fixedly provided on the outer surface of the second missing gear (23), and the lever (24) is located at the rightmost meshing tooth on the surface of the second missing gear (23).

Images