Underwater gearbox

Abstract

The invention relates to the technical field of transmission instruments, in particular to an underwater gearbox. The underwater gearbox comprises a power input mechanism, a power switching mechanism, a power output mechanism, a pressure balance mechanism and a relief mechanism, the input end of the power input mechanism can be in butt joint with the output end of the underwater robot and transmit torque, the power switching mechanism comprises a bevel gear, and the bevel gear is in butt joint with the output end of the power input mechanism and transmits torque. The power output mechanism is provided with a worm and gear structure, the input end of the worm and gear structure is fixed to the bevel gear, the bevel gear is configured to change the power transmission direction of the power input mechanism, the output end of the worm and gear structure is in butt joint with the input end of the underwater valve and transmits torque, and the pressure balance mechanism is in sealed butt joint with the power output mechanism. The pressure balance mechanism can balance the internal and external pressure of the underwater gear box body, and the relief mechanism can conduct the outside and the interior of the underwater gear box when the internal pressure of the underwater gear box reaches a preset value.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission equipment, in particular to an underwater gear box. Background Art

[0002] With the exploration of marine oil and gas resources by the country, it has been found that the ocean contains rich oil and gas resources. Therefore, the development of marine oil and gas resources has become a new focus and growth point for the oil and gas industry. Compared with the development of onshore oil and gas resources, the technical difficulty of marine oil and gas resource development is higher, and underwater valves are the top priority of various marine oil and gas resource development. Underwater valves (flat gate valves, ball valves, etc.) are widely used in underwater Christmas trees, underwater gathering and transportation manifolds, marine pipelines and other gas and liquid medium mining and pipeline systems due to their low flow resistance, reliable sealing and long service life.

[0003] In the related art, since deepwater operation equipment can only control the opening and closing of various underwater valves through remote operation or underwater robots (ROV, Remote Operated Underwater Vehicle), the control of underwater valves can be achieved on drilling platforms or on land. Specifically, a gearbox is set at the underwater valve, and a gearbox with a planetary gear system is used to transfer the underwater robot and the valve respectively, and the output power of the underwater robot is transmitted to the valve to achieve normal driving of the valve. However, with the development of deep-sea oil and gas fields and the increasing demand for large-aperture, high-pressure valves, the torque required to open or close the valve is getting larger and larger. In order to meet the actual needs, the output torque of the gearbox needs to be continuously increased, resulting in the gearbox being too large in size to meet the actual installation space requirements.

[0004] Therefore, it is urgent to invent an underwater gearbox to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an underwater gearbox so as to reduce the size of the underwater gearbox on the basis of improving the transmission torque of the underwater gearbox and meet the transmission requirements and installation requirements at the same time.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An underwater gearbox, which can transmit the power output by the underwater robot to the underwater valve, and comprises:

[0008] A power input mechanism, the input end of which can dock with the output end of the underwater robot and transmit torque;

[0009] A power transfer mechanism, the power transfer mechanism comprising a bevel gear, the bevel gear is connected to the output end of the power input mechanism and transmits torque;

[0010] A power output mechanism, wherein the power output mechanism has a worm gear structure, an input end of the worm gear structure is fixed to the bevel gear, the bevel gear is configured to change the power transmission direction of the power input mechanism, and the output end of the worm gear structure is connected to the input end of the underwater valve to transmit torque;

[0011] A pressure balancing mechanism, the pressure balancing mechanism is sealed and connected to the power output mechanism, and the pressure balancing mechanism can balance the internal and external pressures of the underwater gearbox; and

[0012] The discharge mechanism can conduct the outside world and the interior of the underwater gear box when the internal pressure of the underwater gear box reaches a preset value.

[0013] As an optional solution, the power input mechanism includes:

[0014] An ROV interface having a first docking cavity for accommodating an output end of the underwater robot;

[0015] A conversion box body having a second docking cavity for accommodating an input end of the power transfer mechanism;

[0016] An ROV adapter flange configured to fixedly connect the ROV interface to the conversion box;

[0017] An input shaft, wherein a rectangular portion is provided at one end of the input shaft along the axial direction, and a bevel gear portion is provided at the other end of the input shaft along the axial direction, wherein the rectangular portion is located in the first docking cavity, and the rectangular portion can be meshed with the output end of the underwater robot, and the bevel gear portion is located in the second docking cavity, and the bevel gear portion can be meshed with the bevel gear.

[0018] As an optional solution, the power input mechanism further includes:

[0019] The second docking cavity is filled with lubricating oil, the cavity wall of the second docking cavity is provided with an oil hole communicated with the outside, and the blocking member is configured to block the oil hole.

[0020] As an optional solution, the power transfer mechanism includes:

[0021] a fixing flange fixedly connected to the conversion housing, the fixing flange being used to position the bevel gear along the axial direction of the input end of the worm gear structure; and

[0022] The connecting flange is used to fix the fixing flange and the driving housing. The power output mechanism has a driving housing. The output end of the worm gear structure is located in the driving housing and the input end of the worm gear structure extends out of the driving housing. The connecting flange is used to fix the fixing flange and the driving housing.

[0023] As an optional solution, the pressure balancing mechanism includes:

[0024] An adapter, sealingly connected to the power output mechanism;

[0025] A matching piece is installed on the adapter, the adapter is provided with a conducting hole, a balancing channel is provided in the matching piece, and the balancing channel, the conducting hole and the internal space of the power output mechanism are connected in sequence;

[0026] A deformation bag and a supporting member, wherein the supporting member supports the deformation bag, the deformation bag is elastic, the supporting member blocks the balance channel, external water can enter the deformation bag along the opening of the deformation bag and drive the deformation bag to expand downward, and the supporting member can move along the balance channel.

[0027] As an optional solution, the pressure balancing mechanism further includes:

[0028] A filter element is arranged at the opening of the deformation capsule, and is used for filtering external water entering the deformation capsule.

[0029] As an optional solution, the pressure balancing mechanism further includes:

[0030] A limiting bottle extends in the up-down direction, the deformation capsule is located in the limiting bottle, and the limiting bottle can provide guidance for the deformation of the deformation capsule.

[0031] As an optional solution, the release mechanism includes:

[0032] A discharge valve, a discharge hole is provided on the power output mechanism, the discharge hole connects the inside and the outside of the underwater gear box, and the discharge valve is installed in the discharge hole.

[0033] As an optional solution, the underwater gearbox further comprises:

[0034] The indicating mechanism comprises a first indicating component and a second indicating component, the first indicating component is sealed and docked with the power input mechanism and meshed for transmission, the second indicating component is sealed and docked with the power output mechanism and meshed for transmission, and the first indicating component and the second indicating component are both used to indicate the opening and closing degree of the underwater valve.

[0035] As an optional solution, the first indication component includes:

[0036] A gear set, the input end of which is sealed and connected to the power input mechanism and meshes with each other for transmission;

[0037] A first driving shaft, the output end of the gear set is fixedly connected to the first driving shaft, and the gear set can drive the first driving shaft to rotate around the axial direction of the first driving shaft;

[0038] A first pointer, fixedly connected to the first driving shaft; and

[0039] A first marker and a second marker, wherein the first marker and the second marker are arranged axially at intervals around the first drive shaft, the first pointer rotates between the first marker and the second marker, the position of any one of the first marker and the second marker indicates that the underwater valve is open, and the position of the other one of the first marker and the second marker indicates that the underwater valve is closed.

[0040] Beneficial effects of the present invention:

[0041] The underwater gearbox provided by the present invention achieves the effect of transmitting the power output from the output end of the underwater robot to the input end of the underwater valve by docking the input end of the power input mechanism with the output end of the underwater robot and transmitting torque, docking the output end of the power input mechanism with the bevel gear in the power transfer mechanism and transmitting torque, fixing the bevel gear with the input end of the worm gear structure in the power output mechanism, and docking the output end of the worm gear structure in the power output mechanism with the input end of the underwater valve and transmitting torque. In addition, the worm gear structure in the power output mechanism is docked with the input end of the underwater valve and meshed for transmission, so as to increase the maximum torque that can be transmitted by the underwater gearbox to meet the actual power transmission requirements. In combination with the bevel gear in the power transfer mechanism to change the transmission direction of the power transmitted by the power input mechanism, the power input mechanism, the power transfer mechanism and the power output mechanism can be integrated together, which can not only meet the design of a wide range of torque requirements of the underwater ball valve, but also greatly reduce the overall size of the underwater gearbox to meet the actual installation requirements. In addition, by setting a pressure balancing mechanism that is sealed and connected to the power output mechanism, the pressure balancing mechanism balances the internal and external pressures of the underwater gear box, and a relief mechanism is set to connect the outside world and the underwater gear box when the pressure in the underwater gear box reaches a preset value. If the pressure balancing mechanism fails, the abnormal pressure increase in the gear box body can be released through the relief mechanism to achieve automatic pressure relief and balance the internal and external pressures, thereby avoiding the underwater gear box from being continuously subjected to unidirectional pressure to meet the actual power transmission needs, while ensuring the normal operation of the underwater gear box underwater and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a first structural schematic diagram of an underwater gearbox provided by an embodiment of the present invention;

[0043] Figure 2 is a second structural schematic diagram of an underwater gearbox provided by an embodiment of the present invention;

[0044] Figure 3 is an exploded schematic diagram of an underwater gearbox provided by an embodiment of the present invention;

[0045] Figure 4 is a schematic cross-sectional view of an underwater gearbox provided by an embodiment of the present invention along a vertical plane;

[0046] Figure 5 It is a schematic cross-sectional view of an underwater gearbox provided by an embodiment of the present invention along a horizontal plane.

[0047] In the figure:

[0048] 100, power input mechanism; 110, ROV interface; 120, ROV adapter flange; 130, input shaft; 131, rectangular portion; 132, bevel gear portion; 140, conversion housing; 141, oil hole; 150, plugging piece; 160, rolling bearing;

[0049] 200, power transfer mechanism; 210, bevel gear; 220, fixing flange; 230, connecting flange; 240, thrust bearing;

[0050] 300, power output mechanism; 310, worm gear structure; 311, worm; 312, worm gear; 320, driving box; 321, box body; 322, cover plate; 330, limiting structure; 331, limiting bolt; 332, sealing cap;

[0051] 400, indicating mechanism; 410, first indicating assembly; 411, first pointer; 412, first mark; 413, second mark; 414, first driving shaft; 415, second protective cover; 416, adapter plate; 417, gear set; 420, second indicating assembly;

[0052] 500, pressure balancing mechanism; 510, deformation capsule; 520, supporting member; 530, matching member; 540, adapter; 550, filter member; 560, first protective cover; 570, limit bottle;

[0053] 600, fasteners;

[0054] 700, sealing ring;

[0055] 800, positioning pin;

[0056] 900. Release mechanism. DETAILED DESCRIPTION

[0057] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0058] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0061] Underwater valves are widely used in gas and liquid medium mining and piping systems such as underwater Christmas trees, underwater gathering and transportation manifolds, and marine pipelines. Since deepwater operation equipment can only control the opening and closing of various underwater valves through remote operation or underwater robots, the control of underwater valves can be achieved on drilling platforms or on land. Specifically, a gearbox is set at the underwater valve, and a gearbox with a planetary gear system is used to transfer the underwater robot and the valve respectively, and the output power of the underwater robot is transmitted to the valve to achieve normal driving of the valve. However, with the development of deep-sea oil and gas fields and the increasing demand for large-aperture, high-pressure valves, the torque required to open or close the valve is getting larger and larger. In order to meet actual needs, the output torque of the gearbox needs to be continuously increased, resulting in the size of the gearbox being too large to meet the actual installation space requirements.

[0062] In order to solve the above problems, Figure 1 to Figure 5As shown, this embodiment provides an underwater gearbox to transmit the power output by the underwater robot to the underwater valve. The underwater gearbox includes a power input mechanism 100, a power transfer mechanism 200, a power output mechanism 300, a pressure balancing mechanism 500 and a discharge mechanism 900, wherein the power input mechanism 100, the input end of the power input mechanism 100 can be connected with the output end of the underwater robot and transmit torque, the power transfer mechanism 200 includes a bevel gear 210, the bevel gear 210 is connected with the output end of the power input mechanism 100 and transmits torque, the power output mechanism 300 has a worm gear structure 310, the input end of the worm gear structure 310 is fixed with the bevel gear 210, the bevel gear 210 is configured to change the power transmission direction of the power input mechanism 100, the output end of the worm gear structure 310 is sealed and connected with the input end of the underwater valve and meshed transmission, the pressure balancing mechanism 500 is sealed and connected with the power output mechanism 300, the pressure balancing mechanism 500 can balance the internal and external pressures of the power output mechanism 300, and the discharge mechanism 900 can conduct the outside world with the inside of the underwater gearbox when the internal pressure of the underwater gearbox reaches a preset value.

[0063] The underwater gearbox achieves the effect of transmitting the power output from the output end of the underwater robot to the input end of the underwater valve by docking the input end of the power input mechanism 100 with the output end of the underwater robot and transmitting torque, docking the output end of the power input mechanism 100 with the bevel gear 210 in the power transfer mechanism 200 and transmitting torque, fixing the bevel gear 210 with the input end of the worm gear structure 310 in the power output mechanism 300, and docking the output end of the worm gear structure 310 in the power output mechanism 300 with the input end of the underwater valve and transmitting torque, and utilizing The worm gear structure 310 in the power output mechanism 300 is docked with the input end of the underwater valve and meshes with each other for transmission, thereby increasing the maximum torque that the underwater gearbox can transmit and meeting actual power transmission requirements. Combined with the bevel gear 210 in the power transfer mechanism 200, the transmission direction of the power transmitted by the power input mechanism 100 is changed, and the power input mechanism 100, the power transfer mechanism 200 and the power output mechanism 300 can be integrated together, which can not only meet the design of a wide range of torque requirements of the underwater ball valve, but also greatly reduce the overall size of the underwater gearbox and meet actual installation requirements. In addition, by setting a pressure balancing mechanism 500 that is sealed and connected to the power output mechanism 300, the pressure balancing mechanism 500 balances the internal and external pressures of the power output mechanism 300, and a relief mechanism 900 is set to connect the outside world and the underwater gear box when the pressure in the underwater gear box reaches a preset value. If the pressure balancing mechanism 500 fails, the abnormal pressure increase in the gear box body can be released through the relief mechanism 900 to achieve automatic pressure relief and balance the internal and external pressures, thereby avoiding the underwater gear box from being continuously subjected to unidirectional pressure to meet the actual power transmission requirements, while ensuring the normal operation of the underwater gear box underwater and increasing its service life.

[0064] It should be noted that, in this embodiment, the worm gear structure 310 includes a worm 311 and a worm wheel 312 meshing with each other, wherein the worm 311 is fixed to the bevel gear 210, and the worm wheel 312 is connected to the input end of the underwater valve and meshes with each other for transmission.

[0065] In this embodiment, the underwater gearbox further includes a positioning pin 800, a fastener 600, and a sealing ring 700. The power input mechanism 100, the power transfer mechanism 200, the power output mechanism 300, and the pressure balance mechanism 500 are positioned by the positioning pin 800, fixed by the fastener 600, and sealed by the sealing ring 700. It should be noted that in this embodiment, the fastener 600 is a bolt and the sealing ring 700 is a rubber ring.

[0066] As an optional solution, the power input mechanism 100 includes an ROV interface 110, a conversion box 140, an ROV adapter flange 120 and an input shaft 130, wherein the ROV interface 110 has a first docking cavity for accommodating the output end of the underwater robot, the conversion box 140 has a second docking cavity for accommodating the input end of the power transfer mechanism 200, and the ROV adapter flange 120 is configured to fixedly connect the ROV interface 110 with the conversion box 140, and a rectangular portion 131 is provided at one end of the input shaft 130 along the axial direction, and a bevel gear portion 132 is provided at the other end of the input shaft 130 along the axial direction, the rectangular portion 131 is located in the first docking cavity, and the rectangular portion 131 can be meshed with the output end of the underwater robot, and the bevel gear portion 132 is located in the second docking cavity, and the bevel gear portion 132 can be meshed with the input end of the power transfer mechanism 200.

[0067] The ROV interface 110 is fixedly connected to the conversion box 140 by using the ROV adapter flange 120, and a rectangular portion 131 and a bevel gear portion 132 are respectively provided at both ends of the input shaft 130 in the axial direction, and the rectangular portion 131 is provided in the first docking cavity in the ROV interface 110, so that the output end of the underwater robot is engaged with the rectangular portion 131 in the first docking cavity, and the bevel gear portion 132 is provided in the second docking cavity in the conversion box 140, so that the input end of the power transfer mechanism 200 is engaged with the bevel gear portion 132 in the second docking cavity. It should be noted that the ROV adapter flange 120 is positioned between the ROV interface 110 and the conversion box 140 by a positioning pin 800, fixed by a fastener 600, and sealed by a sealing ring 700.

[0068] In order to further improve the positioning accuracy of the input shaft 130 in the conversion box 140 and reduce the friction between the input shaft 130 and the conversion box 140, the power input mechanism 100 also includes a rolling bearing 160, which is clamped between the input shaft 130 and the conversion box 140 to achieve radial positioning of the input shaft 130 and reduce the friction between the input shaft 130 and the conversion box 140.

[0069] In actual operation, in order to increase the service life of the underwater gearbox, the second docking cavity is filled with lubricating oil. To facilitate filling the second docking cavity with lubricating oil, the power input mechanism 100 further includes a blocking member 150. The cavity wall of the second docking cavity is provided with an oil hole 141 that is in communication with the outside, and the blocking member 150 is configured to block the oil hole 141.

[0070] In an optional scheme, the power transfer mechanism 200 includes a bevel gear 210, a fixed flange 220 and a connecting flange 230, wherein the bevel gear 210 is sleeved on the outer periphery of the worm 311, the bevel gear 210 is located in the second docking cavity, the fixed flange 220 is fixedly connected to the conversion housing 140, the fixed flange 220 is used to position the bevel gear 210 along the axial direction of the worm 311, the power output mechanism 300 has a drive housing 320, the worm 311 is located in the drive housing 320 and both axial ends of the worm 311 extend out of the drive housing 320, and the connecting flange 230 is used to fix the fixed flange 220 and the drive housing 320. By setting the bevel gear 210 in the second docking cavity, using the fixing flange 220 to fix the conversion box 140, and using the connecting flange 230 to fix the fixing flange 220 to the drive box 320 in the power output mechanism 300, the bevel gear 210 is sleeved on the outer periphery of the worm 311, and the bevel gear 210 is meshed with the bevel gear portion 132, so as to realize the change of the direction of power transmission of the power input mechanism 100 by the power transfer mechanism 200. It should be noted that in this embodiment, the power output direction of the output end of the underwater robot is to rotate around the vertical axis, and the meshing transmission between the bevel gear portion 132 and the bevel gear 210 can drive the worm 311 to rotate around the horizontal axis. In other embodiments, the power output direction of the output end of the underwater robot can also be adjusted according to actual needs, and the assembly meshing mode of the bevel gear portion 132 and the bevel gear 210 can be adaptively adjusted to adjust the power output direction of the worm 311. In addition, in this embodiment, the fixing flange 220 and the conversion housing 140, the fixing flange 220 and the connecting flange 230, and the connecting flange 230 and the driving housing 320 are positioned by positioning pins 800, fixed by fasteners 600 and sealed by sealing rings 700.

[0071] Similarly, in order to improve the transmission effect of the power transfer mechanism 200, a thrust bearing 240 is provided between the bevel gear 210 and the fixing flange 220. The thrust bearing 240 can thrust and position the bevel gear 210 along the axial direction of the worm 311.

[0072] As an optional solution, the pressure balancing mechanism 500 includes an adapter 540, a matching member 530, a deformation capsule 510 and a supporting member 520, wherein the adapter 540 is sealed and docked with the drive box 320, the matching member 530 is installed on the adapter 540, the adapter 540 is provided with a conducting hole, and a balancing channel is provided in the matching member 530, the balancing channel, the conducting hole and the internal space of the drive box 320 are sequentially connected, the supporting member 520 supports the deformation capsule 510, and the deformation capsule 5 10 is elastic, the supporting member 520 blocks the balance channel, the external water can enter the deformation capsule 510 along the opening of the deformation capsule 510 and drive the deformation capsule 510 to expand downward, the supporting member 520 can move along the balance channel to change the volume in the driving box 320, and changing the volume in the driving box 320 while the volume of the medium in the driving box 320 remains unchanged can increase or decrease the pressure in the driving box 320, so that the internal pressure of the driving box 320 is equal to the external pressure. It should be noted that in this embodiment, the adapter 540, the driving box 320 and the matching member 530 are positioned by the positioning pin 800, fixed by the fastener 600 and sealed by the sealing ring 700.

[0073] Specifically, when the pressure of the external water increases, the external water will enter the deformation bag 510 and drive the deformation bag 510 to expand downward, thereby driving the supporting member 520 supporting the deformation bag 510 to move downward along the balance channel. Since the supporting member 520 seals the internal space of the balance channel, the conduction hole and the driving box 320 that are interconnected, during the downward movement of the supporting member 520, the internal space of the balance channel, the conduction hole and the driving box 320 will be compressed, thereby increasing the internal pressure of the balance channel, the conduction hole and the driving box 320, so that the pressure between the balance channel, the conduction hole and the driving box 320 is equal to the pressure of the external water. When the pressure of the external water decreases, the deformation bag 510 will drive the water in the deformation bag 510 to be discharged under the action of its own elastic force, and the deformation bag 510 will shrink upward. At this time, the upper part of the supporting member 520 supporting the deformation bag 510 loses the downward driving force, and the enclosed space composed of the balancing channel, the conducting hole and the driving box 320 will drive the supporting member 520 to move upward along the balancing channel until the supporting member 520 is in contact with the deformation bag 510 again. At this time, the pressure of the external water is exactly equal to the internal pressure of the balancing channel, the conducting hole and the driving box 320.

[0074] To improve the deformation effect of the deformation capsule 510 , the pressure balancing mechanism 500 further includes a limiting bottle 570 . The limiting bottle 570 extends in the up-down direction. The deformation capsule 510 is located in the limiting bottle 570 . The limiting bottle 570 can provide guidance for the deformation of the deformation capsule 510 .

[0075] Due to the complex actual operating environment of the underwater gearbox, underwater animals or underwater debris enter the deformation capsule 510 through the opening, thereby affecting the expansion and contraction of the deformation capsule 510. To ensure the normal use of the deformation capsule 510, the pressure balance mechanism 500 further includes a filter 550, wherein the filter 550 is arranged at the opening of the deformation capsule 510, and the filter 550 is used to filter the external water entering the deformation capsule 510.

[0076] In addition, in this embodiment, the pressure balancing mechanism 500 further includes a first protective cover 560 , which is disposed on the outside of the limiting bottle 570 to further prevent animals or debris from approaching the deformation bag 510 .

[0077] In order to further improve the safety of the underwater gearbox, the discharge mechanism 900 also includes a discharge valve. The power output mechanism 300 is provided with a discharge hole, the discharge hole conducts the inside and outside of the power output mechanism 300, and the discharge valve is installed in the discharge hole. When the pressure of the external water is too large or the deformation capsule 510 fails, the deformation of the deformation capsule 510 can no longer balance the internal and external pressures of the drive box 320. If the internal pressure of the underwater gearbox reaches a preset value, the discharge valve is opened to conduct the inside and outside of the drive box 320.

[0078] In order to further facilitate the observation of the transmission effect of the underwater gearbox, the underwater gearbox also includes an indication mechanism 400, which includes a first indication component 410 and a second indication component 420. The first indication component 410 is sealed and docked with the power input mechanism 100 and meshed for transmission, and the second indication component 420 is sealed and docked with the power output mechanism 300 and meshed for transmission. The first indication component 410 and the second indication component 420 are both used to indicate the opening and closing degree of the underwater valve. By arranging the first indication component 410 and the second indication component 420 in the indication mechanism 400, the first indication component 410 is sealed and docked with the power input mechanism 100 and meshed for transmission, and the second indication component 420 is sealed and docked with the power output mechanism 300 and meshed for transmission, and the first indication component 410 and the second indication component 420 are respectively indicated by the first indication component 410 and the second indication component 420. The tooling personnel can not only quickly determine the opening and closing degree of the underwater valve, but also judge the transmission accuracy of the underwater gearbox by comparing the indication results of the first indication component 410 and the second indication component 420. If the indication deviation between the first indication component 410 and the second indication component 420 is within the acceptable range, it indicates that the internal structure of the underwater gearbox can work normally. If the indication deviation between the first indication component 410 and the second indication component 420 exceeds the acceptable range, it indicates that there is a problem inside the underwater gearbox and maintenance is required. The specific value of the acceptable range can be adjusted according to actual needs and is not specifically limited in this embodiment.

[0079] In this embodiment, the first indication component 410 includes a gear group 417, a first drive shaft 414, a first pointer 411, a first identifier 412 and a second identifier 413, wherein the input end of the gear group 417 is meshed with the input shaft 130 of the power input mechanism 100 for transmission, the output end of the gear group 417 is fixedly connected to the first drive shaft 414, the gear group 417 can drive the first drive shaft 414 to rotate around the axial direction of the first drive shaft 414, the first pointer 411 is fixedly connected to the first drive shaft 414, the first identifier 412 and the second identifier 413 are arranged at intervals around the axial direction of the first drive shaft 414, the first pointer 411 rotates between the first identifier 412 and the second identifier 413, the position of any one of the first identifier 412 and the second identifier 413 indicates that the underwater valve is open, and the position of the other of the two indicates that the underwater valve is closed. When the underwater robot drives the input shaft 130 to rotate axially around the input shaft 130, the gear set 417 meshing with the input shaft 130 rotates accordingly, thereby driving the first drive shaft 414 and the first pointer 411 to rotate axially around the first drive shaft 414, thereby achieving the effect of deflecting the first pointer 411 between the first mark 412 and the second mark 413 to indicate the degree of opening and closing of the underwater valve.

[0080] In order to improve the protection of the gear set 417, the first indication assembly 410 further includes an adapter plate 416 and a second protective cover 415, the adapter plate 416 and the second protective cover 415 are buckled and fixed together, and the buckled adapter plate 416 and the second protective cover 415 are clamped between the ROV interface 110 and the ROV adapter flange 120, and the gear set 417 is located between the adapter plate 416 and the second protective cover 415. It should be noted that in this embodiment, the adapter plate 416 and the second protective cover 415 are positioned by the positioning pin 800, fixed by the fastener 600 and sealed by the sealing ring 700, and the buckled adapter plate 416 and the second protective cover 415 are also positioned by the positioning pin 800 and the ROV interface 110 and the ROV adapter flange 120, and fixed by the fastener 600 and the ROV interface 110 and the ROV adapter flange 120.

[0081] To further simplify the structure of the underwater gearbox, in this embodiment, the drive box body 320 includes a box body 321 and a cover plate 322 that are fastened together, the worm gear 312 is accommodated in the box body 321, and the second indication component 420 only includes a second drive shaft with the same structure as the first drive shaft 414, a second pointer with the same structure as the first pointer 411, and a third mark and a fourth mark with the same structure as the first mark 412 and the second mark 413. The second drive shaft passes through the cover plate 322 and is fixed coaxially with the worm wheel 312. The third mark and the fourth mark are fixed on the cover plate 322 at an axial interval around the second drive shaft. The second pointer is fixed at the second drive shaft. When the worm 311 rotates around its own axis, it can drive the worm wheel 312 meshing with the worm 311 to rotate around its own axis, thereby driving the second drive shaft and the second pointer to deflect between the third mark and the fourth mark to indicate the opening and closing degree of the underwater valve. It should be noted that, in this embodiment, the box body 321 and the cover plate 322 are positioned by a positioning pin 800 , fixed by a fastener 600 , and sealed by a sealing ring 700 .

[0082] In this embodiment, an engagement groove is provided on the axis of the worm gear 312, which engages with the input end of the underwater valve. Since the second pointer can rotate around the central axis of the worm gear 312 and deflect between the third mark and the fourth mark, the second pointer can accurately reflect the opening and closing state of the underwater valve.

[0083] In addition, in this embodiment, the power output mechanism 300 also includes two sets of limiting structures 330, which are respectively arranged on the side walls of the box body 321 and partially extend into the box body 321. The two sets of limiting structures 330 are used to limit the maximum rotation angle of the worm gear 312.

[0084] Specifically, each set of limiting structures 330 includes a limiting bolt 331 and a sealing cap 332, wherein the side wall of the box body 321 is provided with two limiting through holes, and the limiting bolts 331 in the two sets of limiting structures 330 are respectively extended into the box body 321 along the limiting through holes, and the sealing caps 332 are respectively fixed to one end of the corresponding limiting bolt 331 located outside the box body 321 and sealed with a sealing ring 700. The portion of the limiting bolt 331 extending into the box body 321 can abut against the worm gear 312 to prevent the worm gear 312 from rotating around its own axis, thereby achieving the effect of the two limiting bolts 331 jointly limiting the maximum rotation angle of the worm gear 312. It should be noted that in this embodiment, the worm gear 312 can rotate arbitrarily within the range of 0 to 90 degrees. In other embodiments, the maximum rotation angle of the worm gear 312 can also be adjusted according to actual needs, and this embodiment does not make specific restrictions.

[0085] In order to further facilitate the understanding of the underwater gearbox provided in this embodiment, Figure 1 to Figure 5 The specific working process of the underwater gearbox is described as follows:

[0086] 1) The output end of the underwater robot extends into the first docking cavity in the ROV interface 110 and engages with the rectangular portion 131 on the input shaft 130, and the output end of the underwater robot drives the input shaft 130 to rotate around the axial direction of the input shaft 130;

[0087] 2) The bevel gear portion 132 on the input shaft 130 meshes with the bevel gear 210 in the power transfer mechanism 200 to cause the bevel gear 210 sleeved on the worm 311 to rotate around the axial direction of the worm 311;

[0088] 3) The worm gear 312 engages and docks with the output end of the underwater valve, thereby driving the underwater valve to open or close.

[0089] It should be noted that during the transmission process of the input shaft 130 in the underwater gearbox, the first pointer 411 deflects between the first mark 412 and the second mark 413, and the second pointer deflects between the third mark and the fourth mark to indicate the opening and closing degree of the underwater valve.

[0090] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An underwater gearbox, which can transmit the power output by the underwater robot to the underwater valve, characterized in that: The underwater gearbox comprises: A power input mechanism (100), the input end of the power input mechanism (100) being capable of docking with the output end of the underwater robot and transmitting torque; A power transfer mechanism (200), the power transfer mechanism (200) comprising a bevel gear (210), the bevel gear (210) being connected to the output end of the power input mechanism (100) and transmitting torque; A power output mechanism (300), the power output mechanism (300) having a worm gear structure (310), the input end of the worm gear structure (310) being fixed to the bevel gear (210), the bevel gear (210) being configured to change the power transmission direction of the power input mechanism (100), the output end of the worm gear structure (310) being docked with the input end of the underwater valve and transmitting torque; a pressure balancing mechanism (500), the pressure balancing mechanism (500) being sealed and docked with the power output mechanism (300), and the pressure balancing mechanism (500) being capable of balancing the internal and external pressures of the underwater gearbox; and The discharge mechanism (900) can connect the outside with the interior of the underwater gear box when the internal pressure of the underwater gear box reaches a preset value.

2. The underwater gearbox according to claim 1, characterized in that: The power input mechanism (100) comprises: An ROV interface (110) having a first docking cavity for accommodating an output end of the underwater robot; A conversion box (140) having a second docking cavity for accommodating an input end of the power transfer mechanism (200); An ROV adapter flange (120) is configured to fixedly connect the ROV interface (110) to the conversion box (140); An input shaft (130), wherein one end of the input shaft (130) along the axial direction is provided with a rectangular portion (131), and the other end of the input shaft (130) along the axial direction has a bevel gear portion (132), wherein the rectangular portion (131) is located in the first docking cavity, and the rectangular portion (131) can mesh with the output end of the underwater robot, and the bevel gear portion (132) is located in the second docking cavity, and the bevel gear portion (132) can mesh with the bevel gear (210).

3. The underwater gearbox according to claim 2, characterized in that: The power input mechanism (100) further comprises: The sealing member (150) is filled with lubricating oil in the second docking cavity, the cavity wall of the second docking cavity is provided with an oil hole (141) which is in communication with the outside, and the sealing member (150) is configured to seal the oil hole (141).

4. The underwater gearbox according to claim 2, characterized in that: The power transfer mechanism (200) comprises: a fixing flange (220) fixedly connected to the conversion housing (140), the fixing flange (220) being used to position the bevel gear (210) along the axial direction of the input end of the worm gear structure (310); and The power output mechanism (300) comprises a drive housing (320), the output end of the worm gear structure (310) is located in the drive housing (320) and the input end of the worm gear structure (310) extends out of the drive housing (320), and the connecting flange (230) is used for fixedly connecting the fixing flange (220) and the drive housing (320).

5. The underwater gearbox according to any one of claims 1 to 4, characterized in that: The pressure balancing mechanism (500) comprises: An adapter (540) is sealed and docked with the power output mechanism (300); A matching piece (530) is mounted on the adapter (540), the adapter (540) is provided with a conducting hole, a balancing channel is provided inside the matching piece (530), and the balancing channel, the conducting hole and the internal space of the power output mechanism (300) are connected in sequence; A deformation capsule (510) and a supporting member (520), wherein the supporting member (520) supports the deformation capsule (510), the deformation capsule (510) is elastic, the supporting member (520) blocks the balancing channel, external water can enter the deformation capsule (510) along the opening of the deformation capsule (510) and drive the deformation capsule (510) to expand downward, and the supporting member (520) can move along the balancing channel.

6. The underwater gearbox according to claim 5, characterized in that: The pressure balancing mechanism (500) further comprises: A filter element (550), wherein the filter element (550) is arranged at the opening of the deformation capsule (510), and the filter element (550) is used to filter external water entering the deformation capsule (510).

7. The underwater gearbox according to claim 6, characterized in that: The pressure balancing mechanism (500) further comprises: The limiting bottle (570) extends in the up-down direction, the deformation capsule (510) is located in the limiting bottle (570), and the limiting bottle (570) can provide guidance for the deformation of the deformation capsule (510).

8. The underwater gearbox according to any one of claims 1 to 4, characterized in that: The release mechanism comprises: A discharge valve (570), wherein a discharge hole is provided on the power output mechanism (300), wherein the discharge hole connects the inside and the outside of the underwater gear box, and the discharge valve (570) is installed in the discharge hole.

9. The underwater gearbox according to any one of claims 1 to 4, characterized in that: The underwater gearbox also includes: An indicating mechanism (400), the indicating mechanism (400) comprising a first indicating component (410) and a second indicating component (420), the first indicating component (410) being sealed and docked with the power input mechanism (100) and meshingly transmitting, the second indicating component (420) being sealed and docked with the power output mechanism (300) and meshingly transmitting, the first indicating component (410) and the second indicating component (420) both being used to indicate the degree of opening and closing of the underwater valve.

10. The underwater gearbox according to claim 9, characterized in that: The first indication component (410) comprises: A gear set (417), wherein the input end of the gear set (417) is sealed and butted with the power input mechanism (100) and meshes with each other for transmission; A first driving shaft (414), wherein an output end of the gear set (417) is fixedly connected to the first driving shaft (414), and the gear set (417) is capable of driving the first driving shaft (414) to rotate around the axial direction of the first driving shaft (414); A first pointer (411) fixedly connected to the first driving shaft (414); and A first marker (412) and a second marker (413), wherein the first marker (412) and the second marker (413) are arranged axially with spacing therebetween around the first drive shaft (414), and the first pointer (411) rotates between the first marker (412) and the second marker (413), and the position of any one of the first marker (412) and the second marker (413) indicates that the underwater valve is open, and the position of the other one of the first marker (412) and the second marker (413) indicates that the underwater valve is closed.

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