CN112873133B - Screw locking device for underwater nuclear pump and mounting and dismounting method thereof - Google Patents
Screw locking device for underwater nuclear pump and mounting and dismounting method thereof Download PDFInfo
- Publication number
- CN112873133B CN112873133B CN202110326992.7A CN202110326992A CN112873133B CN 112873133 B CN112873133 B CN 112873133B CN 202110326992 A CN202110326992 A CN 202110326992A CN 112873133 B CN112873133 B CN 112873133B
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- oil
- locking slide
- screw
- slide fastener
- hole
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 150
- 239000010720 hydraulic oil Substances 0.000 claims description 37
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001010 compromised effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Screw locking device for underwater nuclear pump and installation and disassembly method thereof belong to the technical field of nuclear power pump safety. The invention can be installed and detached at the screw of the underwater nuclear pump in a long distance, thereby preventing the screw from loosening and falling, saving time and labor, improving the working efficiency, reducing the irradiation dose of personnel and ensuring safer and more reliable maintenance operation. The anti-loosening device comprises a disassembly platform and an anti-loosening mechanism and is characterized in that the disassembly platform comprises a bracket, a piston sleeve, a supporting cylinder, an anti-pushing rod, an elastic clamp and a locking slide buckle, wherein the bracket is provided with a blind hole, an end cover is detachably arranged at the open end of the blind hole of the bracket, the piston sleeve is arranged in the blind hole and extends out of the center of the blind hole and the end cover, the piston sleeve is provided with a convex ring, the convex ring is contacted with the hole wall of the blind hole, the supporting cylinder and the anti-pushing rod are sequentially arranged inside the piston sleeve, and one end of the supporting cylinder is in tight contact with one end of the anti-pushing rod.
Description
Technical Field
The invention belongs to the technical field of pump safety for nuclear power, and particularly relates to a screw locking device for an underwater nuclear pump and an installation and disassembly method thereof.
Background
The main pump for nuclear power is main equipment for providing power for reactor coolant, and is the only key equipment for continuous operation in a nuclear power main system. In the main pump equipment, the mechanical seal internals in contact with the reactor coolant, which directly determine the safe operation of the main pump, are usually connected by screws, and therefore the safety and reliability of their operation are of critical importance. Because the mechanical seal internal parts are contacted with the coolant, and the connecting piece-screw connecting mechanical seal internal parts are necessarily contacted with the coolant, the connected piece and the screw are immersed in the coolant, and along with the circulating work of the radioactive coolant with high temperature and high pressure (the temperature is 300 ℃ and the pressure is 172.3 bar), the screw can loosen, misplace and fall off under complex stress and impact vibration, the reliability and the safety of the operation of the main pump cannot be ensured, even serious safety accidents are caused, and great personal and property losses are brought. Therefore, the excellent locking and loosening performance and reliability of the screw directly determine the safe operation of the main pump. When the screw needs to be fastened, the existing nuclear pump arranged underwater generally needs personnel to wear protective clothing to carry out close-range operation, and the operation is time-consuming, labor-consuming and low in efficiency, and more importantly, nuclear radiation can be generated to operators during close-range operation, so that the physical safety of the personnel is greatly compromised.
Disclosure of Invention
Aiming at the problems, the invention makes up the defects of the prior art and provides a screw anti-loosening device for an underwater nuclear pump and an installation and disassembly method thereof; the invention has compact structure, easy maintenance and convenient replacement, can be installed and disassembled at the screw of the underwater nuclear pump in a long distance, not only prevents the screw from loosening and falling, saves time and labor, improves the working efficiency, but also reduces the irradiation dose of personnel, and ensures that the overhaul operation is safer and more reliable.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The invention provides a screw locking device for an underwater nuclear pump, which comprises a disassembly and assembly platform and a locking mechanism and is characterized in that the disassembly and assembly platform comprises a bracket, a piston sleeve, a supporting cylinder, a push stopping rod, an elastic clamp holder and a locking slide buckle, wherein the bracket is provided with a blind hole, an end cover is detachably arranged at the open end of the blind hole of the bracket, the piston sleeve is arranged in the blind hole and extends out of the center of the blind hole and the end cover, the piston sleeve is provided with a convex ring, the convex ring is contacted with the hole wall of the blind hole, the supporting cylinder and the push stopping rod are sequentially arranged in the piston sleeve, one end of the supporting cylinder is tightly contacted with one end of the push stopping rod, the supporting cylinder and the push stopping rod can axially move in the piston sleeve, the elastic clamp holder and the piston sleeve are fixedly connected in a matching way, the elastic clamp holder is provided with a push rod through hole and a slide buckle groove, the push stopping rod can extend out of the push rod through hole, the locking slide buckle and the elastic clamp holder are detachably connected in a matching way, and one side of the bracket is provided with a plurality of oil holes; the locking mechanism comprises a clamping tongue, a limiting snap ring and a reset spring, a groove corresponding to the locking slide fastener is formed in the screw position of the nuclear pump in advance, the clamping tongue is arranged in the groove and corresponds to the locking slide fastener, the limiting snap ring corresponds to the inner end of the clamping tongue and is fixed in the groove, and the reset spring is sleeved at the outer end of the clamping tongue.
Further, the number of the convex rings is two, the piston sleeve is provided with an oil passing hole, the supporting cylinder is provided with an oil passing through groove corresponding to the oil passing hole in the axial direction, a first oil cavity is formed between the convex rings close to the bottom of the blind hole and the bottom of the blind hole, a second oil cavity is formed between the parts between the two convex rings and the side wall of the blind hole, a third oil cavity is formed between the convex rings close to the end cover and the end cover, and a fourth oil cavity is formed between the inside of the supporting cylinder and the thrust rod.
Furthermore, the number of the oil filling holes is three, the first oil filling holes are correspondingly formed in the first oil cavity of the support, the second oil filling holes are correspondingly formed in the second oil cavity of the support, and the third oil filling holes are formed in the third oil cavity of the support.
Further, one end of the piston sleeve, which is close to the bottom of the blind hole, is provided with a mounting opening, and a sealing plug is arranged at the mounting opening in a matched manner.
Further, the end part of the elastic clamp is provided with a clamping protrusion, the middle part of the locking slide buckle is provided with an indent matched with the clamping protrusion, and the elastic clamp is connected with the locking slide buckle in a matched manner through the clamping protrusion and the indent.
Further, the bracket is also provided with a real-time positioning camera.
The invention also provides a method for installing the screw anti-loosening device for the underwater nuclear pump, which comprises the following steps of.
1) And preparing on water, wherein the first oil filling hole, the second oil filling hole and the third oil filling hole are respectively inserted with the oil filling pipes.
2) The disassembly and assembly platform is transported to the underwater and transported by the underwater traveling trolley, and the screw to be operated is searched by observing and remotely controlling the underwater traveling trolley to move by the real-time positioning camera until the screw of the locking slide fastener to be installed is searched.
3) After the center of the elastic clamp holder is centered with the center of the screw, hydraulic oil is injected into the first oil injection hole, the first oil cavity is filled with high-pressure hydraulic oil, the piston sleeve moves towards the direction of the screw under the action of hydraulic pressure, and then the supporting cylinder, the thrust rod, the elastic clamp holder and the locking slide buckle move towards the direction of the screw at the same time.
4) The locking slide is contacted with the inclined surface part of the clamping tongue, the reset spring is pushed to be compressed in the radial direction under the action of hydraulic component force, so that the clamping tongue is gradually pushed away in the radial direction, and when the bottom surface of the locking slide moves to the top surface of the clamping tongue, the installation of the locking slide and the locking of a screw are realized.
5) The hydraulic oil is injected from the second oil injection hole, the second oil cavity is filled with high-pressure hydraulic oil, the second oil cavity is communicated with the fourth oil cavity due to the oil passing hole and the oil passing through groove, the fourth oil cavity is also filled with high-pressure oil, so that the thrust rod is propped against the locking slide buckle under the action of the hydraulic pressure of the hydraulic oil in the fourth oil cavity, meanwhile, the third oil injection hole is filled with hydraulic oil, the third oil cavity is filled with hydraulic oil to enable the elastic clamp to retract under the action of the hydraulic pressure, and the elastic clamp is separated from the locking slide buckle and returns to an initial position.
6) And (3) transporting the dismounting platform out of the water surface, clamping the other locking slide buckle by the elastic clamp holder, and repeating the first step to install the next locking slide buckle.
The invention also provides a disassembling method of the screw anti-loosening device for the underwater nuclear pump, which comprises the following steps of.
1) The elastic clamp is prepared on water, the elastic clamp is elastically deformed by the clamping protrusion and the concave part of the locking slide fastener, the locking slide fastener is clamped in the elastic clamp, and the first oil filling hole, the second oil filling hole and the third oil filling hole are respectively inserted into the oil filling pipe.
2) The disassembly platform is transported to the underwater and transported by the underwater walking trolley, and the screw to be operated is searched by observing and remotely controlling the movement of the underwater walking trolley through the real-time positioning camera until the locking slide fastener to be disassembled is searched.
3) After the center of the elastic clamp holder is centered with the center of the locking slide buckle, hydraulic oil is injected into the first oil injection hole, the first oil cavity is filled with high-pressure hydraulic oil, the piston sleeve moves towards the direction of the screw under the action of hydraulic pressure, and then the supporting cylinder, the thrust rod and the elastic clamp holder simultaneously move towards the direction of the screw.
4) The elastic clamp is contacted with the inclined surface part of the clamping tongue, the reset spring is pushed to be compressed in the radial direction under the action of hydraulic pressure component force, so that the clamping tongue is gradually pushed away in the radial direction until the clamping convex part at the inner side of the elastic clamp and the concave part of the locking slide are elastically deformed, and the locking slide is clamped in the clamp
5) And hydraulic oil is injected into the third oil injection hole, and the third oil cavity is filled with the hydraulic oil to enable the elastic clamp holder to retract under the action of the hydraulic force, so that the locking slide fastener is detached.
6) The elastic clamp holder drives the locking slide buckle to retract to an initial position together, and the clamping tongue resets under the action of the reset spring in the retracting process.
7) And (3) transporting the dismounting platform out of the water surface, taking down the locking slide buckle from the elastic clamp holder, and repeating the first step to dismount the locking slide buckle next.
The invention has the beneficial effects of.
According to the invention, the locking mechanism is arranged in advance on the underwater nuclear pump, the remote positioning is performed through the real-time positioning camera, the disassembly and assembly platform is conveyed to the operation position through the underwater vehicle to be matched with the locking mechanism, the disassembly and assembly platform is oiled through the remote oil injection pipeline to install or disassemble the locking slide buckle, so that the irradiation dose of personnel is reduced, the remote maintenance operation is safer and more reliable, the locking slide buckle is under the action of the pressing force of the clamping tongue, the physical locking of the screw is realized, and meanwhile, the locking slide buckle is pressed in the axial direction due to the limiting function of the clamping tongue, so that the traditional axial locking is replaced. The invention has simple structure, low cost and convenient installation and disassembly, and is suitable for mass production. The invention can be used for installing, fastening, loosening prevention and quick disassembly of structural parts in special environments in nuclear reactors, can be used for loosening prevention scenes of other high-reliability screws, and has wide application range.
Drawings
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description is presented by way of example only and is not intended to limit the invention.
Fig. 1 is a schematic overall cross-sectional view of the present invention.
Fig. 2 is a general external schematic view of the present invention from one perspective during operation.
Fig. 3 is a general external schematic of the invention at another perspective prior to operation.
Fig. 4 is a schematic view of the spring holder of the present invention.
Fig. 5 is a schematic view of the locking slider of the present invention.
The marks in the figure: the device comprises a bracket 1, a piston sleeve 2, a supporting cylinder 3, a push rod 4, an elastic clamp holder 5, a locking slide fastener 6, an end cover 7, a convex ring 8, a push rod through hole 9, a slide fastener groove 10, a clamping tongue 11, a limiting clamp ring 12, a return spring 13, an oil passing hole 14, an oil passing through groove 15, a first oil cavity 16, a second oil cavity 17, a third oil cavity 18, a fourth oil cavity 19, a first oil filling hole 20, a second oil filling hole 21, a third oil filling hole 22, a mounting port 23, a sealing plug 24, a clamping convex part 25, an inward concave part 26, a real-time positioning camera 27, a core pump 28 and an oil filling pipe 29.
Detailed Description
The anti-loosening device is shown in the attached drawing and comprises a disassembly platform and an anti-loosening mechanism, wherein the disassembly platform is provided with a bracket 1. The support 1 is provided with the blind hole, and the blind hole open end detachably of support 1 is provided with end cover 7, and end cover 7 is fixed on support 1 with bolt detachably for with the blind hole open end of support 1 sealed.
The piston sleeve 2 is arranged in the blind hole and extends out from the blind hole and the end rod, the piston sleeve 2 is provided with two convex rings 8, the convex rings 8 are contacted with the wall of the blind hole, and the piston sleeve 2 can form a plurality of independent relatively closed spaces by utilizing the structures of the convex rings 8 and the bracket 1. The inside support section of thick bamboo 3 and the thrust rod 4 that are provided with of piston sleeve 2, the one end of support section of thick bamboo 3 and the one end of thrust rod 4 contact each other, support section of thick bamboo 3 and thrust rod 4 can be at the inside axial displacement of piston sleeve 2, and piston sleeve 2 both ends opening and together with, the opening of the one end that piston sleeve 2 is close to the blind hole bottom is mounting mouth 23 to the assembly debugging of being convenient for, the cooperation of mounting mouth 23 department is provided with sealing plug 24. The thrust rod 4 and the support cylinder 3 can be placed in sequence from the mounting opening 23 during mounting, and the sealing plug 24 is plugged to play a role of end sealing. The thrust rod 4 can protrude from the opening of the piston sleeve 2 remote from the bottom end of the blind hole. The piston sleeve 2 is provided with an oil passing hole 14, and the support cylinder 3 is provided with an oil passing groove 15 corresponding to the oil passing hole 14 in the axial direction, and the injected oil can enter the support cylinder 3 through the oil passing hole 14 and the oil passing groove 15.
A first oil cavity 16 is formed between the convex rings 8 near the bottom of the blind hole and the bottom of the blind hole, a second oil cavity 17 is formed between the part between the two convex rings 8 and the side wall of the blind hole, a third oil cavity 18 is formed between the convex rings 8 near the end cover 7 and the end cover 7, and a fourth oil cavity 19 is formed between the inside of the supporting cylinder 3 and the thrust rod 4.
The number of the oil holes is three and the oil holes are arranged on one side of the bracket 1, the bracket 1 is correspondingly provided with a first oil hole 20 at the first oil cavity 16, a second oil hole 21 at the second oil cavity 17 and a third oil hole 22 at the third oil cavity 18. A long oil filler pipe 29 is respectively inserted into the three oil filler holes from the water, and the oil filler pipe 29 can convey hydraulic oil on the water to the water and inject the hydraulic oil into the dismounting platform through the three oil filler holes.
The oil injected from the first oil injection hole 20 may enter the first oil chamber 16 and push the piston sleeve 2, the oil injected from the second oil injection hole 21 may flow through the oil hole 14 and the oil passing through groove 15, enter the fourth oil chamber 19 from the second oil chamber 17, and thus apply pressure to the thrust rod 4, and the oil injected from the third oil injection hole 22 may enter the third oil chamber 18 and push the piston sleeve 2 in the homing direction.
The elastic clamp holder 5 is fixedly connected with the piston sleeve 2 in a matching way. The elastic clamp 5 is provided with a push rod through hole 9 and a slide buckle groove 10, and the push rod 4 can extend out of the push rod through hole 9.
The end of the elastic clamp holder 5 is provided with a clamping convex 25, the middle part of the locking slide buckle 6 is provided with an indent 26 matched with the clamping convex 25, and the elastic clamp holder 5 and the locking slide buckle 6 are detachably connected through the matching of the clamping convex 25 and the indent 26, so that the locking slide buckle is easy to assemble and disassemble. The locking slide fastener 6 is used for locking the screw and preventing the screw from loosening and falling off.
The locking mechanism comprises a clamping tongue 11, a limiting clamping ring 12 and a reset spring 13, a groove corresponding to the locking slide fastener 6 is formed in the screw position of the existing nuclear pump 28 in advance, the clamping tongue 11 is arranged in the groove and corresponds to the locking slide fastener 6, the limiting clamping ring 12 corresponds to the inner end of the clamping tongue 11 and is fixed in the groove, and the reset spring 13 is sleeved at the outer end of the clamping tongue 11. The clamping tongue 11 is propped against by the return spring 13 when the external force given by the locking slide buckle 6 is not received, and the position of the clamping tongue 11 is limited by the limiting snap ring 12. When the clamping tongue 11 is pushed by the locking slide fastener 6, the clamping tongue is expanded outwards until the locking slide fastener 6 is contacted with the screw and locked, the clamping tongue 11 is always contacted with the locking slide fastener 6, and the locking slide fastener 6 is pressed tightly in the axial direction after being mounted on the screw due to the limiting function of the clamping tongue 11, so that the traditional axial looseness prevention is replaced.
The bracket 1 is also provided with a real-time positioning camera 27, and the dismounting platform can be transported by the underwater traveling trolley, so that the real-time positioning camera 27 can remotely observe the moving track of the dismounting platform under water, find the position of a screw to be operated, and realize a series of remote operations.
The installation method comprises the following steps.
1) The elastic clamp 5 is elastically deformed by the clamping convex 25 and the concave 26 of the locking slide fastener 6 to clamp the locking slide fastener 6 in the elastic clamp 5, and the first oil filling hole 20, the second oil filling hole 21 and the third oil filling hole 22 are respectively inserted with the oil filling pipe 29.
2) The disassembly and assembly platform is transported to the water and transported by the underwater traveling trolley, and the screw to be operated is searched by observing and remotely controlling the movement of the underwater traveling trolley by means of the real-time positioning camera 27 until one screw to be operated is searched.
3) After the center of the locking slide fastener 6 is centered with the center of the screw, hydraulic oil is injected into the first oil injection hole 20, the cavity of the first oil cavity 16 is filled with high-pressure hydraulic oil, the piston sleeve 2 moves towards the direction of the screw under the action of hydraulic pressure, and the supporting cylinder 3, the thrust rod 4, the elastic clamp holder 5 and the locking slide fastener 6 move towards the direction of the screw at the same time.
4) The locking slide 6 is contacted with the inclined surface part of the clamping tongue 11, the reset spring 13 is pushed to be compressed in the radial direction under the action of hydraulic component force, so that the clamping tongue 11 is gradually pushed away in the radial direction, and when the bottom surface of the locking slide 6 moves to the top surface of the clamping tongue 11, the installation of the locking slide 6 and the locking of a screw are realized.
5) The hydraulic oil is injected from the second oil injection hole 21, the second oil cavity 17 is filled with high-pressure hydraulic oil, the second oil cavity 17 is communicated with the fourth oil cavity 19 due to the oil passing hole 14 and the oil passing through groove 15, the fourth oil cavity 19 is also filled with high-pressure oil, and therefore the thrust rod 4 is propped against the locking slide buckle 6 under the action of the hydraulic pressure of the hydraulic oil in the fourth oil cavity 19. Meanwhile, the third oil filling hole 22 is filled with hydraulic oil, the third oil cavity 18 is filled with hydraulic oil, the elastic clamp holder 5 is retracted under the action of hydraulic force, and the elastic clamp holder 5 is separated from the locking slide fastener 6 and retracted to the initial position.
6) And transporting the disassembly and assembly platform out of the water surface. The elastic gripper 5 clamps the other locking slider 6, and the locking operation of the next screw is repeated in the first step.
The disassembly method comprises the following steps.
1) The elastic clamp 5 is elastically deformed by the clamping convex 25 and the concave 26 of the locking slide fastener 6 to clamp the locking slide fastener 6 in the elastic clamp 5, and the first oil filling hole 20, the second oil filling hole 21 and the third oil filling hole 22 are respectively inserted with the oil filling pipe 29.
2) The disassembly platform is transported to the water and transported by the underwater traveling trolley, and the screw to be operated is searched by observing and remotely controlling the movement of the underwater traveling trolley by means of the real-time positioning camera 27 until a locking slide fastener 6 to be disassembled is searched.
3) After the center of the elastic clamp holder 5 is centered with the center of the locking slide buckle 6, hydraulic oil is injected into the first oil injection hole 20, the cavity of the first oil cavity 16 is filled with high-pressure hydraulic oil, the piston sleeve 2 moves towards the direction of the screw under the action of hydraulic pressure, and the supporting cylinder 3, the thrust rod 4 and the elastic clamp holder 5 move towards the direction of the screw at the same time.
4) The elastic clamp 5 contacts with the inclined surface part of the clamping tongue 11, the return spring 13 is pushed to be compressed along the radial direction under the action of hydraulic pressure, so that the clamping tongue 11 is gradually pushed away along the radial direction until the clamping convex 25 at the inner side of the elastic clamp 5 and the concave 26 of the locking slide 6 are elastically deformed, and the locking slide 6 is clamped in the clamp
5) The third oil filling hole 22 is filled with hydraulic oil, and the third oil cavity 18 is filled with hydraulic oil to enable the elastic clamp holder 5 to retract under the action of hydraulic pressure, so that the locking slide fastener 6 is detached.
6) The elastic clamp holder 5 drives the locking slide buckle 6 to retract to the initial position together, and the clamping tongue 11 is reset under the action of the reset spring 13 in the retracting process.
7) The platform is moved out of the water, and the locking slide 6 is removed from the elastic holder 5 and ready for the next action.
It will be appreciated that the above detailed description of the invention is provided for illustration of the invention and not for limitation of the technical solutions described in the embodiments of the invention, and that the person skilled in the art should understand that the invention may be modified or substituted for the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.
Claims (6)
1. The utility model provides a screw locking device for an underwater nuclear pump, includes dismouting platform and locking mechanism, its characterized in that, dismouting platform includes support (1), piston sleeve (2), support section of thick bamboo (3), thrust rod (4), elastic gripper (5), locking slider (6), support (1) are provided with the blind hole, blind hole open end detachably of support (1) is provided with end cover (7), piston sleeve (2) set up in the blind hole and follow blind hole with end cover (7) center stretches out, piston sleeve (2) are provided with bulge loop (8), bulge loop (8) with the pore wall of blind hole contacts, piston sleeve (2) inside sets gradually support section of thick bamboo (3) with thrust rod (4), support section of thick bamboo (3) with thrust rod (4) one end in close contact, support section of thick bamboo (3) with thrust rod (4) can be in piston sleeve (2) inside axial displacement, elastic gripper (5) with piston sleeve (2) are connected fixedly with piston (5) and elastic gripper (5) are connected with elastic gripper (4) and elastic gripper (4) are connected with elastic gripper (9) and elastic gripper (4) is connected with thrust rod (4) and elastic gripper (4) is connected with elastic gripper (10), a plurality of oil injection holes are formed in one side of the bracket (1); the locking mechanism comprises a clamping tongue (11), a limiting snap ring (12) and a return spring (13), a groove corresponding to the locking slide fastener (6) is formed in the screw position of the nuclear pump (28) in advance, the clamping tongue (11) is arranged in the groove and corresponds to the locking slide fastener (6), the limiting snap ring (12) corresponds to the inner end of the clamping tongue (11) and is fixed in the groove, and the return spring (13) is sleeved at the outer end of the clamping tongue (11);
The number of the convex rings (8) is two, oil passing holes (14) are formed in the piston sleeve (2), oil passing through grooves (15) are formed in the axial direction of the supporting cylinder (3) corresponding to the oil passing holes (14), a first oil cavity (16) is formed between the convex rings (8) close to the bottom of the blind hole and the bottom of the blind hole, a second oil cavity (17) is formed between the parts between the two convex rings (8) and the side wall of the blind hole, a third oil cavity (18) is formed between the convex rings (8) close to the end cover (7) and the end cover (7), and a fourth oil cavity (19) is formed between the inside of the supporting cylinder (3) and the thrust rod (4);
The piston sleeve (2) is close to one end of blind hole bottom is provided with mounting hole (23), mounting hole (23) department cooperation is provided with sealing plug (24).
2. Screw locking device for an underwater nuclear pump according to claim 1, characterized in that the number of oil holes is three, the bracket (1) is provided with a first oil hole (20) corresponding to the first oil cavity (16), a second oil hole (21) corresponding to the second oil cavity (17) and a third oil hole (22) corresponding to the third oil cavity (18).
3. Screw locking device for an underwater nuclear pump according to claim 1, characterized in that the end of the elastic clamp holder (5) is provided with a clamping protrusion (25), the middle part of the locking slide button (6) is provided with an indent (26) matched with the clamping protrusion (25), and the elastic clamp holder (5) is connected with the locking slide button (6) in a matched manner through the clamping protrusion (25) and the indent (26).
4. Screw locking device for an underwater nuclear pump according to claim 1, characterized in that the bracket (1) is also provided with a real-time positioning camera (27).
5. A method for installing a screw locking device for an underwater nuclear pump using the screw locking device for an underwater nuclear pump according to any one of claims 1 to 4, characterized in that the method comprises the steps of:
1) The method comprises the steps of preparing on water, and respectively inserting oil injection pipes (29) into a first oil injection hole (20), a second oil injection hole (21) and a third oil injection hole (22);
2) The disassembly and assembly platform is transported to the water and transported by the underwater traveling trolley, and the screw to be operated is looked up by observing through a real-time positioning camera (27) and remotely controlling the movement of the underwater traveling trolley until the screw of the locking slide fastener (6) to be installed is looked up;
3) After the center of the elastic clamp holder (5) is centered with the center of the screw, hydraulic oil is injected into the first oil injection hole (20), the cavity of the first oil cavity (16) is filled with high-pressure hydraulic oil, the piston sleeve (2) moves towards the direction of the screw under the action of hydraulic pressure, and then the supporting cylinder (3), the thrust rod (4), the elastic clamp holder (5) and the locking slide buckle (6) move towards the direction of the screw at the same time;
4) The locking slide fastener (6) is contacted with the inclined surface part of the clamping tongue (11), the reset spring (13) is pushed to be compressed in the radial direction under the action of hydraulic pressure component force, so that the clamping tongue (11) is gradually pushed away in the radial direction, and when the bottom surface of the locking slide fastener (6) moves to the top surface of the clamping tongue (11), the installation of the locking slide fastener (6) and the locking of a screw are realized;
5) The hydraulic oil is injected from the second oil injection hole (21), the second oil cavity (17) is filled with high-pressure hydraulic oil, the oil passing hole (14) and the oil passing through groove (15) enable the second oil cavity (17) to be communicated with the fourth oil cavity (19), the fourth oil cavity (19) is also filled with high-pressure oil at the same time, so that the thrust rod (4) props against the locking slide fastener (6) under the action of the hydraulic oil in the fourth oil cavity (19), meanwhile, the third oil injection hole (22) is filled with the hydraulic oil, the third oil cavity (18) is filled with the hydraulic oil to enable the elastic clamp holder (5) to retract under the action of the hydraulic oil, and the elastic clamp holder (5) is separated from the locking slide fastener (6) and returns to an initial position;
6) And (3) conveying the disassembly platform out of the water surface, clamping the other locking slide fastener (6) by the elastic clamp holder (5), and repeating the first step to perform the installation work of the next locking slide fastener (6).
6. A method for disassembling a screw locking device for an underwater nuclear pump using the screw locking device for an underwater nuclear pump according to any one of claims 1 to 4, characterized in that the disassembling method comprises the steps of:
1) The elastic clamp holder (5) elastically deforms by means of the clamping convex part (25) and the concave part (26) of the locking slide fastener (6), the locking slide fastener (6) is clamped in the elastic clamp holder (5), and the first oil filling hole (20), the second oil filling hole (21) and the third oil filling hole (22) are respectively inserted with the oil filling pipe (29);
2) The disassembly platform is transported to the water and transported by the underwater travelling trolley, and the screw to be operated is looked up by observing through a real-time positioning camera (27) and remotely controlling the movement of the underwater travelling trolley until a locking slide fastener (6) to be disassembled is looked up;
3) After the center of the elastic clamp holder (5) is centered with the center of the locking slide buckle (6), hydraulic oil is injected into the first oil injection hole (20), the cavity of the first oil cavity (16) is filled with high-pressure hydraulic oil, the piston sleeve (2) moves towards the direction of the screw under the action of the hydraulic oil, and then the supporting cylinder (3), the thrust rod (4) and the elastic clamp holder (5) move towards the direction of the screw at the same time;
4) The elastic clamp holder (5) is contacted with the inclined surface part of the clamping tongue (11), and the reset spring (13) is pushed to be compressed in the radial direction under the action of hydraulic pressure component force, so that the clamping tongue (11) is gradually pushed away in the radial direction until the clamping convex part (25) at the inner side of the elastic clamp holder (5) and the concave part (26) of the locking slide fastener (6) are elastically deformed, and the locking slide fastener (6) is clamped in the clamp holder;
5) The third oil filling hole (22) is filled with hydraulic oil, and the third oil cavity (18) is filled with hydraulic oil to enable the elastic clamp holder (5) to retract under the action of the hydraulic pressure, so that the locking slide fastener (6) is detached;
6) The elastic clamp holder (5) drives the locking slide buckle (6) to retract to the initial position together, and the clamping tongue (11) is reset under the action of the reset spring (13) in the retracting process;
7) And (3) transporting the disassembly platform out of the water surface, taking down the locking slide fastener (6) from the elastic clamp holder (5), and repeating the first step to disassemble the next locking slide fastener (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326992.7A CN112873133B (en) | 2021-03-26 | 2021-03-26 | Screw locking device for underwater nuclear pump and mounting and dismounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110326992.7A CN112873133B (en) | 2021-03-26 | 2021-03-26 | Screw locking device for underwater nuclear pump and mounting and dismounting method thereof |
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| CN112873133A CN112873133A (en) | 2021-06-01 |
| CN112873133B true CN112873133B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113790144B (en) * | 2021-09-01 | 2023-04-25 | 四川创电沪蓉新能源科技有限公司 | Environment-friendly electric oil-free piston air compressor for vehicle |
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