CN112873133A - Screw anti-loosening device for underwater nuclear pump and mounting and dismounting method thereof - Google Patents
Screw anti-loosening device for underwater nuclear pump and mounting and dismounting method thereof Download PDFInfo
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- CN112873133A CN112873133A CN202110326992.7A CN202110326992A CN112873133A CN 112873133 A CN112873133 A CN 112873133A CN 202110326992 A CN202110326992 A CN 202110326992A CN 112873133 A CN112873133 A CN 112873133A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 146
- 239000010720 hydraulic oil Substances 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000000945 filler Substances 0.000 description 15
- 239000002826 coolant Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011148 porous material Substances 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
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Classifications
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- 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
Abstract
A screw anti-loosening device for an underwater nuclear pump and an installation and disassembly method thereof belong to the technical field of nuclear power pump safety. The invention can be installed and disassembled at the screw position of the underwater nuclear pump in a long distance, not only prevents the screw from loosening and falling off, saves time and labor, improves the operation efficiency, but also reduces the irradiation dose of personnel, and ensures that the maintenance operation is safer and more reliable. The anti-loosening device comprises a dismounting platform and an anti-loosening mechanism, and is characterized in that the dismounting platform comprises a support, a piston sleeve, a supporting cylinder, a thrust rod, an elastic clamp and a locking slide fastener, the support is provided with a blind hole, an end cover is detachably arranged at the open end of the blind hole of the support, the piston sleeve is arranged in the blind hole and extends out of the blind hole and the center of the end cover, the piston sleeve is provided with a convex ring, the convex ring is in contact with the wall of the blind hole, the supporting cylinder and the thrust rod are sequentially arranged in the piston sleeve, and one end of the supporting cylinder is in close contact with one end of the thrust rod.
Description
Technical Field
The invention belongs to the technical field of nuclear power pump safety, and particularly relates to a screw anti-loosening device for an underwater nuclear pump and an installation and disassembly method thereof.
Background
The nuclear power main pump is a main device for providing power for a reactor coolant, and is the only continuously-operated key device in a nuclear power main system. In the main pump equipment, the mechanical seal internals, which are in contact with the reactor coolant, are usually screwed, which directly determine the safe operation of the main pump and are therefore of critical importance for its safety and reliability of operation. Because the internal parts of the mechanical seal are contacted with the coolant, and the connecting piece-screw connected with the internal parts of the mechanical seal are necessarily contacted with the coolant, the connected piece and the screw are immersed in the coolant, along with the circulation work of the radioactive coolant at high temperature and high pressure (the temperature is 300 ℃ and the pressure is 172.3 bar), the screw can be loosened, dislocated and dropped under the complex stress and impact vibration, the reliability and the safety of the operation of the main pump can not be ensured, even serious safety accidents can be caused, and the serious personal and property loss is brought. Therefore, the excellent locking and loosening performance and reliability of the screw directly determine the safe operation of the main pump. The nuclear pump of arranging under water at present all needs personnel to wear protective clothing to go into the water and carry out closely the operation when needing fastening screw, and such operation not only wastes time and energy inefficiency, and more importantly can produce nuclear radiation to operating personnel when closely the operation, causes great harm to personnel's health safety.
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 simple and convenient replacement, can be remotely installed and disassembled at the screw position of the underwater nuclear pump, not only prevents the screw from loosening and falling off, saves time and labor, improves the operation efficiency, but also reduces the irradiation dose of personnel, and ensures that the maintenance operation is safer and more reliable.
In order to achieve the purpose, the invention adopts the following technical scheme.
The invention provides a screw anti-loosening device for an underwater nuclear pump, which comprises a disassembly platform and an anti-loosening mechanism, and is characterized in that the disassembly platform comprises a support, a piston sleeve, a supporting cylinder, a thrust rod, an elastic clamp holder and a locking sliding buckle, wherein the support is provided with a blind hole, an end cover is detachably arranged at the open end of the blind hole of the support, the piston sleeve is arranged in the blind hole and extends out of the centers of the blind hole and the end cover, the piston sleeve is provided with a convex ring, the convex ring is in contact with the hole wall of the blind hole, the supporting cylinder and the thrust rod are sequentially arranged in the piston sleeve, one end of the supporting cylinder is in close contact with one end of the thrust rod, the supporting cylinder and the thrust rod can axially move in the piston sleeve, the elastic clamp holder is fixedly connected with the piston sleeve in a matching way, and the elastic clamp holder is provided with a push rod through hole, the thrust rod can extend out of the through hole of the push rod, the locking slide fastener is detachably matched and connected with the elastic holder, and a plurality of oil injection holes are formed in one side of the bracket; the anti-loosening mechanism comprises a clamping tongue, a limiting clamping ring and a reset spring, a groove corresponding to the locking sliding buckle is formed in advance in the screw of the nuclear pump, the clamping tongue is arranged in the groove and corresponds to the locking sliding buckle, the limiting clamping ring corresponds to the inner end of the clamping tongue and is fixed in the groove, and the reset spring is sleeved on the outer end of the clamping tongue.
Furthermore, the number of the convex rings is two, oil passing holes are formed in the piston sleeve, the supporting cylinder is provided with an oil passing through groove corresponding to the oil passing holes 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 part 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 a fourth oil cavity is formed between the inside of the supporting cylinder and the thrust rod.
Furthermore, the number of the oil holes is three, the bracket is provided with a first oil hole at the first oil cavity, a second oil hole at the second oil cavity, and a third oil hole at the third oil cavity.
Furthermore, an installation opening is formed in one end, close to the bottom of the blind hole, of the piston sleeve, and a sealing plug is arranged at the installation opening in a matched mode.
Furthermore, the tip of elasticity holder is provided with the card protruding, locking thread slipping middle part be provided with the protruding matched with indent of card, elasticity holder with the locking thread slipping passes through the card protruding with the indent cooperation is connected.
Furthermore, a real-time positioning camera is further arranged on the support.
The invention also provides an installation method of the screw anti-loosening device for the underwater nuclear pump, and the installation method comprises the following steps.
1) And preparing on water, and inserting the oil filling pipe into the first oil filling hole, the second oil filling hole and the third oil filling hole respectively.
2) The disassembling and assembling platform is conveyed underwater and conveyed by an underwater walking trolley, and screws to be operated are searched by means of observing through the real-time positioning camera and remotely controlling the underwater walking trolley to move until one screw to be installed with the locking slide fastener is searched.
3) When the center of the elastic holder is aligned with the center of the screw, hydraulic oil is injected into the first oil 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 support cylinder, the thrust rod, the elastic holder and the locking slider move towards the direction of the screw simultaneously.
4) The locking slide fastener is in contact with the inclined surface part of the clamping tongue, the reset spring is pushed to be compressed along the radial direction under the action of hydraulic component force, the clamping tongue is gradually pushed away along the radial direction, and when the bottom surface of the locking slide fastener moves to the top surface of the clamping tongue, the locking slide fastener is installed and the screw is locked.
5) The second oil cavity is communicated with the fourth oil cavity due to the oil passing hole and the oil passing through groove, and the fourth oil cavity is also filled with high-pressure oil, so that the thrust rod props the locking slide fastener under the action of hydraulic force of the hydraulic oil in the fourth oil cavity, the third oil hole is filled with the hydraulic oil to enable the elastic clamp holder to retreat under the action of the hydraulic force, and the elastic clamp holder is separated from the locking slide fastener and retreats to the initial position.
6) And conveying the dismounting platform out of the water surface, clamping the other locking slide fastener by the elastic clamp holder, and repeating the first step to carry out the installation work of the next locking slide fastener.
The invention also provides a method for disassembling the screw anti-loosening device for the underwater nuclear pump.
1) Preparing on water, the elastic clamp holder leans on the clamping convex and the locking slider the indent of the locking slider generates elastic deformation, the locking slider is clamped in the elastic clamp holder, and the first oil filler hole, the second oil filler hole and the third oil filler hole are respectively inserted with the oil filler pipe.
2) The disassembling platform is conveyed underwater and conveyed by an underwater walking trolley, and screws to be operated are searched by means of observing through the real-time positioning camera and remotely controlling the underwater walking trolley to move until one locking slide fastener to be disassembled is searched.
3) When the center of the elastic holder is aligned with the center of the locking slider, hydraulic oil is injected into the first oil 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 support cylinder, the thrust rod and the elastic holder move towards the direction of the screw simultaneously.
4) The elastic clamp holder is in contact with the inclined surface part of the clamping tongue, the reset spring is pushed to be compressed along the radial direction under the action of hydraulic component force, the clamping tongue is gradually pushed away along the radial direction until the clamping protrusion on the inner side of the elastic clamp holder and the concave part of the locking sliding buckle are elastically deformed, and the locking sliding buckle is clamped in the clamp holder
5) And hydraulic oil is injected into the third oil hole, and the third oil cavity is filled with the hydraulic oil to enable the elastic clamp holder to retreat under the action of hydraulic pressure, so that the locking slide fastener is detached.
6) The elastic clamp holder drives the locking slide fastener to retreat to an initial position together, and the clamping tongue resets under the action of the reset spring in the retreating process.
7) And conveying the dismounting platform out of the water surface, taking down the locking slide fastener from the elastic holder, and repeating the first step to carry out the next dismounting work of the locking slide fastener.
The invention has the beneficial effects.
According to the invention, the anti-loosening mechanism is arranged in advance on the underwater nuclear pump, the real-time positioning camera is used for remote positioning, the dismounting platform is conveyed to an operation position through the underwater vehicle to be matched with the anti-loosening mechanism, the dismounting platform is oiled through the remote oil injection pipeline to mount or dismount the locking slide fastener, the irradiation dosage of personnel is reduced, the remote maintenance operation is safer and more reliable, the locking slide fastener realizes the physical locking of a screw under the action of the pressing force of the clamping tongue, and meanwhile, the locking slide fastener is pressed in the axial direction due to the limiting function of the clamping tongue, so that the traditional axial anti-loosening is replaced. The invention has simple structure, low cost and convenient assembly and disassembly, and is suitable for batch production. The invention can be used for the installation, fastening, looseness prevention and quick disassembly of structural parts in special environments in nuclear reactors, can also be used for looseness prevention scenes of other high-reliability screws, and has wide application range.
Drawings
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present 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 and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is an overall sectional view schematically showing the present invention.
FIG. 2 is a general external view of the present invention from one perspective during operation.
Fig. 3 is an overall external schematic view of the present invention from another perspective prior to operation.
Fig. 4 is a schematic view of the elastic holder of the present invention.
Figure 5 is a schematic view of the locking slide of the present invention.
The labels in the figure are: the device comprises a support 1, a piston sleeve 2, a support barrel 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 clamping 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 opening 23, a sealing plug 24, a clamping protrusion 25, an inner recess 26, a real-time positioning camera 27, a nuclear pump 28 and an oil filling pipe 29.
Detailed Description
The combined type anti-loosening device is shown in the attached drawing and comprises a dismounting platform and a loosening-preventing mechanism, wherein the dismounting platform is provided with a support 1. The support 1 is provided with a blind hole, the blind hole opening end of the support 1 is detachably provided with an end cover 7, and the end cover 7 is detachably fixed on the support 1 through a bolt and is used for sealing the blind hole opening end of the support 1.
Piston sleeve 2 sets up in the blind hole and stretches out from blind hole and end pole, and piston sleeve 2 is provided with two bulge loops 8, and bulge loop 8 contacts with the pore wall of blind hole, and piston sleeve 2 can utilize the structure of bulge loop 8 and support 1 to form a plurality of comparatively confined independent spaces. Piston sleeve 2 is inside to be provided with supporting cylinder 3 and thrust rod 4, and the one end of supporting cylinder 3 and the one end of thrust rod 4 contact each other, and supporting cylinder 3 and thrust rod 4 can be inside along axial displacement at piston sleeve 2, and 2 both ends openings of piston sleeve and together with, the opening of the one end that piston sleeve 2 is close to the blind hole bottom is installing port 23 to in the assembly debugging, the cooperation of installing port 23 department is provided with sealing plug 24. During installation, the thrust rod 4 and the support cylinder 3 can be inserted in sequence from the installation opening 23, and the sealing plug 24 is plugged to perform the end sealing function. A thrust rod 4 can project from the opening of the piston sleeve 2 away from the blind bore bottom end. The piston sleeve 2 is provided with an oil passing hole 14, the supporting cylinder 3 is provided with an oil passing through groove 15 in the axial direction corresponding to the oil passing hole 14, and injected oil can enter the supporting cylinder 3 through the oil passing hole 14 and the oil passing through groove 15.
A first oil cavity 16 is formed between the convex ring 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 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 ring 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 support cylinder 3 and the thrust rod 4.
The oil holes are three and are arranged at one side of the bracket 1, the bracket 1 is correspondingly provided with a first oil hole 20 at the first oil chamber 16, a second oil hole 21 at the second oil chamber 17 and a third oil hole 22 at the third oil chamber 18. A long oil filling pipe 29 is respectively inserted into the three oil filling holes from the water, and the oil filling 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 filling holes.
The oil injected from the first oil filler hole 20 can enter the first oil chamber 16 and push the piston sleeve 2, the oil injected from the second oil filler hole 21 can flow through the oil hole 14 and the oil passing through groove 15, and enter the fourth oil chamber 19 from the second oil chamber 17, thereby applying pressure to the thrust rod 4, and the oil injected from the third oil filler hole 22 can enter the third oil chamber 18, pushing the piston sleeve 2 in the returning direction.
The elastic clamp 5 is matched and fixedly connected with the piston sleeve 2. The elastic clamper 5 is provided with a push rod through hole 9 and a sliding buckle groove 10, and the thrust rod 4 can extend out of the push rod through hole 9.
The end part of the elastic clamp holder 5 is provided with a clamping protrusion 25, the middle part of the locking slide fastener 6 is provided with an inner recess 26 matched with the clamping protrusion 25, and the elastic clamp holder 5 and the locking slide fastener 6 are matched and detachably connected through the clamping protrusion 25 and the inner recess 26, so that the disassembly and the assembly are easy. The locking slide fastener 6 is used for locking the screw and preventing the screw from loosening and falling off.
The anti-loosening mechanism comprises a clamping tongue 11, a limiting clamping ring 12 and a return spring 13, a groove corresponding to the locking slide fastener 6 is formed in the screw of the conventional 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 return spring 13 is sleeved at the outer end of the clamping tongue 11. When the clamping tongue 11 is not subjected to external force given by the locking slide fastener 6, the return spring 13 pushes against the clamping tongue 11, and the position of the clamping tongue 11 is clamped and limited by the limiting snap ring 12. When the clamping tongue 11 is pushed by the locking sliding buckle 6, the clamping tongue 11 expands outwards until the locking sliding buckle 6 is contacted with the screw and locked, the clamping tongue 11 is always contacted with the locking sliding buckle 6, and the locking sliding buckle 6 is axially pressed after being installed on the screw due to the limiting function of the clamping tongue 11, so that the traditional axial looseness prevention is replaced.
The support 1 is also provided with a real-time positioning camera 27, and the dismounting platform can be transported by an underwater walking trolley, so that the real-time positioning camera 27 can remotely observe the underwater movement track of the dismounting platform, find the position of a screw to be operated and realize a remote series of operations.
The mounting method comprises the following steps.
1) The elastic clamper 5 is elastically deformed by the clamping convex 25 and the concave 26 of the locking slide fastener 6, the locking slide fastener 6 is clamped in the elastic clamper 5, and the first oil filler hole 20, the second oil filler hole 21 and the third oil filler hole 22 are respectively inserted with the oil filler pipe 29.
2) The dismounting platform is conveyed underwater and conveyed by an underwater walking trolley, and the screws to be operated are searched by observing and remotely controlling the underwater walking trolley through the real-time positioning camera 27 until one screw to be operated is searched.
3) When the center of the locking slider 6 is aligned with the center of the screw, hydraulic oil is injected into the first oil hole 20, the cavity of the first oil chamber 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 support cylinder 3, the thrust rod 4, the elastic clamp holder 5 and the locking slider 6 move towards the direction of the screw simultaneously.
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 pressed in the radial direction under the action of hydraulic component force, the clamping tongue 11 is gradually pushed open 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 the screw are realized.
5) Hydraulic oil is injected from the second oil injection hole 21, the second oil chamber 17 is filled with high-pressure hydraulic oil, the second oil chamber 17 is communicated with the fourth oil chamber 19 due to the oil passing hole 14 and the oil passing through groove 15, and the fourth oil chamber 19 is also filled with high-pressure oil, so that the thrust rod 4 is propped against the locking slider 6 under the action of the hydraulic pressure of the hydraulic oil in the fourth oil chamber 19. Meanwhile, the third oil hole 22 is filled with hydraulic oil, the third oil chamber 18 is filled with hydraulic oil to make the elastic clamp 5 retreat under the action of hydraulic pressure, and the elastic clamp 5 is separated from the locking slide fastener 6 and retreats to the initial position.
6) And (5) transporting the dismounting platform out of the water surface. The elastic clamper 5 clamps another locking slide fastener 6, and the first step is repeated to carry out the locking operation of the next screw.
The disassembling method comprises the following steps.
1) The elastic clamper 5 is elastically deformed by the clamping convex 25 and the concave 26 of the locking slide fastener 6, the locking slide fastener 6 is clamped in the elastic clamper 5, and the first oil filler hole 20, the second oil filler hole 21 and the third oil filler hole 22 are respectively inserted with the oil filler pipe 29.
2) The dismounting platform is conveyed underwater and conveyed by an underwater walking trolley, and the screws to be operated are searched by observing and remotely controlling the underwater walking trolley through the real-time positioning camera 27 until one locking slide fastener 6 to be dismounted is searched.
3) When the center of the elastic clamp holder 5 is aligned with the center of the locking slider 6, hydraulic oil is injected into the first oil 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 support cylinder 3, the thrust rod 4 and the elastic clamp holder 5 move towards the direction of the screw simultaneously.
4) The elastic clamper 5 contacts with the inclined plane part of the clamping tongue 11, the reset spring 13 is pushed to press along the radial direction under the action of hydraulic component force, 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 clamper 5 and the concave 26 of the locking slide fastener 6 are elastically deformed, and the locking slide fastener 6 is clamped in the clamper
5) The third oil hole 22 is filled with hydraulic oil, and the third oil chamber 18 is filled with hydraulic oil to cause the elastic holder 5 to retreat by the hydraulic force, thereby achieving the detachment of the locking slider 6.
6) The elastic clamp holder 5 drives the locking slide fastener 6 to retreat to the initial position together, and the clamping tongue 11 resets under the action of the return spring 13 in the retreating process.
7) The dismounting platform is transported out of the water surface, and the locking slide fastener 6 is taken down from the elastic clamper 5 to prepare for the next action.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (8)
1. The screw anti-loosening device for the underwater nuclear pump comprises a disassembly and assembly platform and a loosening-preventing mechanism, and is characterized in that the disassembly and assembly platform comprises a support (1), a piston sleeve (2), a support cylinder (3), a thrust rod (4), an elastic clamp (5) and a locking slide fastener (6), wherein the support (1) is provided with a blind hole, an end cover (7) is detachably arranged at the blind hole opening end of the support (1), the piston sleeve (2) is arranged in the blind hole and extends out of the blind hole and the center of the end cover (7), the piston sleeve (2) is provided with a convex ring (8), the convex ring (8) is in contact with the hole wall of the blind hole, the support cylinder (3) and the thrust rod (4) are sequentially arranged inside the piston sleeve (2), one end of the support cylinder (3) is in close contact with one end of the thrust rod (4), the support cylinder (3) and the thrust rod (4) can move axially in the piston sleeve (2), the elastic clamp holder (5) and the piston sleeve (2) are fixedly connected in a matched mode, a push rod through hole (9) and a sliding buckle groove (10) are formed in the elastic clamp holder (5), the thrust rod (4) can extend out of the push rod through hole (9), the locking sliding buckle (6) is detachably connected with the elastic clamp holder (5) in a matched mode, and a plurality of oil injection holes are formed in one side of the support (1); the anti-loosening mechanism comprises a clamping tongue (11), a limiting clamping ring (12) and a reset spring (13), a screw of the nuclear pump (28) is arranged in advance in a groove corresponding to the locking sliding buckle (6), the clamping tongue (11) is arranged in the groove and corresponds to the locking sliding buckle (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).
2. The screw anti-loosening device for the underwater nuclear pump according to claim 1, wherein the number of the convex rings (8) is two, the piston sleeve (2) is provided with an oil passing hole (14), the support cylinder (3) is provided with an oil passing through groove (15) corresponding to the oil passing hole (14) in the axial direction, a first oil chamber (16) is formed between the convex ring (8) close to the bottom of the blind hole and the bottom of the blind hole, a second oil chamber (17) is formed between the part between the two convex rings (8) and the side wall of the blind hole, a third oil chamber (18) is formed between the convex ring (8) close to the end cover (7) and the end cover (7), and a fourth oil chamber (19) is formed between the inside of the support cylinder (3) and the thrust rod (4).
3. The screw looseness prevention device for the underwater nuclear pump according to claim 2, wherein the number of the oil holes is three, the bracket (1) is provided with a first oil hole (20) at the first oil chamber (16), a second oil hole (21) at the second oil chamber (17), and a third oil hole (22) at the third oil chamber (18).
4. The screw anti-loosening device for the underwater nuclear pump according to claim 1, characterized in that one end of the piston sleeve (2) close to the bottom of the blind hole is provided with a mounting hole (23), and a sealing plug (24) is arranged at the mounting hole (23) in a matching manner.
5. The screw anti-loosening device for the underwater nuclear pump according to claim 1, wherein a clamping protrusion (25) is arranged at the end of the elastic clamp holder (5), an inner recess (26) matched with the clamping protrusion (25) is arranged in the middle of the locking slide fastener (6), and the elastic clamp holder (5) and the locking slide fastener (6) are matched and connected through the clamping protrusion (25) and the inner recess (26).
6. The screw anti-loosening device for the underwater nuclear pump is characterized in that a real-time positioning camera (27) is further arranged on the bracket (1).
7. A method for installing a screw locking device for an underwater nuclear pump, which utilizes the screw locking device for the underwater nuclear pump as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps:
1) preparing on water, and inserting the oil filling pipe (29) into the first oil filling hole (20), the second oil filling hole (21) and the third oil filling hole (22) respectively;
2) the disassembling platform is conveyed underwater and conveyed by an underwater walking trolley, and screws to be operated are searched by observing and remotely controlling the underwater walking trolley to move by means of the real-time positioning camera (27) until one screw to be provided with the locking slide fastener (6) is searched;
3) when the center of the elastic clamp holder (5) is aligned with the center of a screw, hydraulic oil is injected into the first oil hole (20), a 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 support cylinder (3), the thrust rod (4), the elastic clamp holder (5) and the locking slide fastener (6) move towards the direction of the screw simultaneously;
4) the locking sliding buckle (6) is in contact with the inclined surface part of the clamping tongue (11), the reset spring (13) is pushed to be pressed in the radial direction under the action of hydraulic component force, the clamping tongue (11) is gradually pushed away in the radial direction, and when the bottom surface of the locking sliding buckle (6) moves to the top surface of the clamping tongue (11), the locking sliding buckle (6) is installed and a screw is locked;
5) 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, so that the thrust rod (4) props against the locking slider (6) under the action of the hydraulic pressure of the hydraulic oil in the fourth oil cavity (19), 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 retreat under the action of the hydraulic pressure, and the elastic clamp holder (5) is separated from the locking slider (6) and retreats to the initial position;
6) and (3) conveying the dismounting 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 carry out the installation work of the next locking slide fastener (6).
8. A method for disassembling a screw locking device for an underwater nuclear pump, which utilizes the screw locking device for the underwater nuclear pump as claimed in any one of claims 1 to 6, and is characterized in that the disassembling method comprises the following steps:
1) preparing on water, elastically deforming the elastic clamp holder (5) by the clamping protrusion (25) and the concave part (26) of the locking slider (6) to clamp the locking slider (6) in the elastic clamp holder (5), and inserting the oil filling pipe (29) into the first oil filling hole (20), the second oil filling hole (21) and the third oil filling hole (22) respectively;
2) the disassembling platform is conveyed underwater and conveyed by an underwater walking trolley, and screws to be operated are searched by observing and remotely controlling the underwater walking trolley to move by means of the real-time positioning camera (27) until one locking slide fastener (6) to be disassembled is searched;
3) when the center of the elastic clamp holder (5) is aligned with the center of the locking slide fastener (6), hydraulic oil is injected into the first oil injection hole (20), a cavity of the first oil cavity (16) is filled with high-pressure hydraulic oil, the piston sleeve (2) moves towards the direction of a screw under the action of hydraulic pressure, and then the support cylinder (3), the thrust rod (4) and the elastic clamp holder (5) move towards the direction of the screw simultaneously;
4) the elastic clamp holder (5) is in contact with the inclined surface part of the clamping tongue (11), the return spring (13) is pushed to be pressed in the radial direction under the action of hydraulic component force, the clamping tongue (11) is gradually pushed away in the radial direction until the clamping protrusion (25) on 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) hydraulic oil is injected into the third oil hole (22), and the third oil cavity (18) is filled with the hydraulic oil to enable the elastic clamp holder (5) to retract under the action of hydraulic force, so that the locking slide fastener (6) is detached;
6) the elastic clamp holder (5) drives the locking slide fastener (6) to retreat to an initial position together, and the clamping tongue (11) resets under the action of the return spring (13) in the retreating process;
7) and (3) conveying the dismounting 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 carry out the next dismounting work of the locking slide fastener (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326992.7A CN112873133A (en) | 2021-03-26 | 2021-03-26 | Screw anti-loosening device for underwater nuclear pump and mounting and dismounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326992.7A CN112873133A (en) | 2021-03-26 | 2021-03-26 | Screw anti-loosening device for underwater nuclear pump and mounting and dismounting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112873133A true CN112873133A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110326992.7A Pending CN112873133A (en) | 2021-03-26 | 2021-03-26 | Screw anti-loosening device for underwater nuclear pump and mounting and dismounting method thereof |
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| Country | Link |
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| CN (1) | CN112873133A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113790144A (en) * | 2021-09-01 | 2021-12-14 | 四川创电沪蓉新能源科技有限公司 | Novel environment-friendly electric oil-free piston air compressor for vehicle |
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