CN111977500A - Dismounting hanger device and dismounting method for nuclear power station main pump seal static ring assembly - Google Patents
Dismounting hanger device and dismounting method for nuclear power station main pump seal static ring assembly Download PDFInfo
- Publication number
- CN111977500A CN111977500A CN202010737320.0A CN202010737320A CN111977500A CN 111977500 A CN111977500 A CN 111977500A CN 202010737320 A CN202010737320 A CN 202010737320A CN 111977500 A CN111977500 A CN 111977500A
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- CN
- China
- Prior art keywords
- ring assembly
- hanging scaffold
- static ring
- dismounting
- sealing static
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
Abstract
The invention discloses a dismounting and mounting hanger device for a nuclear power station main pump sealed static ring assembly and a dismounting and mounting method thereof, wherein the dismounting and mounting hanger device comprises a hanging scaffold fixed on a supporting barrel of the sealed static ring assembly, at least one straight rod detachably connected to the hanging scaffold and used for hoisting the sealed static ring assembly to a first height, and at least one bent rod detachably connected to the hanging scaffold and used for hoisting the sealed static ring assembly to a second height; on the hanging scaffold, the straight rod extends outwards along the radial direction of the sealing static ring component; on the hanging scaffold, one end of the bent rod is connected with the hanging scaffold, and the other end of the bent rod extends downwards at the periphery of the sealing static ring component. The dismounting hanger device is used for dismounting a sealing static ring component of a main pump of a nuclear power station; through the connection in proper order of straight-bar and curved bar as the hoisting point, hang sealed quiet ring subassembly under the condition of not dismantling sealed overflow line, reduce cost of maintenance, practice thrift man-hour, reduce and avoid reasons such as human factor or spare part quality to the sealed safe operation influence of main pump.
Description
Technical Field
The invention relates to the technical field of nuclear power maintenance, in particular to a dismounting and mounting hanger device and a dismounting and mounting method for a nuclear power station main pump seal stationary ring assembly.
Background
Generally, when the inspection of a 100-type main pump 2C is performed during the overhaul of a nuclear power plant, a first sealing static ring assembly needs to be disassembled for inspection, and due to the limitation of the space and the height of a hanger, a first sealing leakage pipeline needs to be additionally disassembled when the first sealing static ring assembly is disassembled, so that the working difficulty and the labor are increased, and the maintenance cost is also increased. In addition, the disassembly of the first seal leakage pipeline easily causes seal leakage, and can affect the safe operation of the main pump seal.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dismounting hanger device of a nuclear power station main pump seal static ring component without dismounting a seal overflow pipeline and a dismounting method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the dismounting and mounting hanger device for the main pump sealing static ring assembly of the nuclear power station comprises a hanging scaffold, at least one straight rod and at least one bent rod, wherein the hanging scaffold is used for being fixed on a supporting cylinder of the sealing static ring assembly;
the second height is greater than the first height and higher than the spindle head of the main pump shaft;
on the hanging scaffold, the straight rod extends outwards along the radial direction of the sealing static ring assembly;
and one end of the bent rod is connected with the hanging scaffold, and the other end of the bent rod extends downwards at the periphery of the sealing static ring assembly.
Preferably, the upper surface of the hanging scaffold is provided with at least one first connecting seat; the outer side surface of the first connecting seat is provided with a connecting hole;
one end of the straight rod or one end of the bent rod is inserted into the connecting hole.
Preferably, the dismounting hanger device further comprises at least one latch;
the upper surface of the first connecting seat is provided with a pin hole communicated to the connecting hole; one end of the straight rod and one end of the bent rod are respectively provided with a through hole matched with the bolt;
and the bolt enters the connecting hole through the pin hole and is inserted into the through hole of the straight rod or the bent rod, so that one end of the straight rod or the bent rod is fixed on the first connecting seat.
Preferably, the hanging scaffold is of an annular structure, and a plurality of mounting holes which are respectively in one-to-one correspondence with the bolt holes on the supporting cylinder are formed in the hanging scaffold; and bolts are arranged in the mounting holes and the bolt holes in a penetrating manner, so that the hanging scaffold is fastened on the supporting cylinder.
Preferably, a first handle is arranged at one end of the straight rod, which is far away from the hanging scaffold, and is used as a hanging point of the straight rod;
and one end of the bent rod, which is far away from the hanging scaffold, is provided with a second handle which extends transversely and is used as a hanging point of the bent rod.
Preferably, the disassembly and assembly hanger apparatus further comprises at least one bracket for positioning the platform and sealing static ring assembly at the first height;
the upper surface of the hanging scaffold is provided with at least one second connecting seat; the second connecting seat radially protrudes out of the outer side of the sealing static ring component; the bracket is placed on the outer side of the sealing static ring assembly and supported below the second connecting seat.
Preferably, the top of the bracket is provided with a U-shaped positioning groove, and the second connecting seat is matched in the U-shaped positioning groove.
The invention also provides a method for disassembling and assembling the sealing static ring assembly of the main pump of the nuclear power station, which adopts any one of the disassembling and assembling hanger devices, and the disassembling and assembling method comprises the steps of disassembling the sealing static ring assembly; the disassembling comprises the following steps:
s1, mounting a hanging scaffold on a supporting cylinder of the sealing static ring assembly, and connecting a straight rod to the hanging scaffold;
s2, connecting a lifting device with the straight rod and lifting, and lifting the hanging scaffold and the sealing static ring assembly to a first height;
s3, detaching the straight rod, and connecting the bent rod to the hanging scaffold;
and S4, connecting the hoisting equipment with the bent rod and hoisting, and hoisting the hanging scaffold and the sealing static ring assembly to a second height which is higher than the shaft head of the main pump shaft.
Preferably, step S2 is followed by: and a bracket is arranged on the outer side of the sealing static ring assembly, the bracket is supported on the bracket through a second connecting seat on the hanging scaffold, and the hanging scaffold and the sealing static ring assembly are positioned at the first height.
Preferably, the disassembling and assembling method further comprises the steps of disassembling and assembling the sealing static ring assembly; the step of reinstalling is the reverse of the step of disassembling.
The dismounting and mounting hanger device is used for dismounting and mounting a sealing static ring component (a first sealing static ring component) of a main pump of a nuclear power station; through the connection in proper order of straight-bar and curved bar as the hoisting point, can hang sealed quiet ring subassembly under the condition of not dismantling sealed overflow line, reduce cost of maintenance, practice thrift man-hour, reduce and avoid reasons such as human factor or spare part quality to the sealed safe operation influence of main pump.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a disassembled hanging bracket device on a sealing static ring assembly (straight rod state) according to an embodiment of the invention;
FIG. 2 is a top view of the disassembled hanger device of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a disassembled hanger assembly on a sealing static ring assembly (bent rod state) according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a disassembled hanger assembly on a sealing stationary ring assembly (in a cradle configuration) according to an embodiment of the present invention;
fig. 5 is a schematic view of the structure of the stent of fig. 4.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the dismounting hanger device for a nuclear power plant main pump seal stationary ring assembly according to an embodiment of the present invention is used for dismounting a seal stationary ring assembly from a main pump. The demountable lifting frame apparatus may include a lifting platform 10, at least one straight rod 20, and at least one bent rod 30. The hanging scaffold 10 is used for fixing on a supporting cylinder of the sealing static ring component 1. The straight rod 20 is detachably connected to the hanging scaffold 10 and is used for hoisting the sealing static ring assembly 1 to a first height; the bent rod 30 is detachably connected to the platform 10 for lifting the seal ring assembly 1 to a second height. The second height is greater than the first height and is higher than the spindle nose of main pump shaft 2 for can break away from main pump shaft 2 when sealed stationary ring subassembly 1 is lifted to the second height, dismantle from the main pump.
On the hanging scaffold 10, the straight rod 20 extends outwards along the radial direction of the sealing static ring assembly 1, so that the straight rod is horizontally placed in parallel with the radial direction of the sealing static ring assembly 1. On the hanging scaffold 10, one end of the bent rod 30 is connected with the hanging scaffold 10, and the other end extends downwards at the periphery of the sealing static ring assembly 1, so that the hanging point is lowered, and the sealing static ring assembly 1 can be continuously lifted upwards.
Specifically, as shown in fig. 1 and 2, the hanging scaffold 10 is of an annular structure, and is sleeved on the periphery of the main pump shaft 2 and fitted on the support cylinder of the sealing static ring assembly 1. The hanging scaffold 10 is provided with a plurality of mounting holes 101 distributed along the circumferential direction of the hanging scaffold, the mounting holes 101 are in one-to-one correspondence with the bolt holes in the supporting cylinder respectively, the hanging scaffold 10 is fastened on the supporting cylinder through bolts penetrating through the mounting holes 101 and the bolt holes, and the mounting holes 101 and the bolt holes are fixed relatively.
The straight rods 20 are connected to the platform 10 in a horizontal arrangement. In order to realize the detachable connection between the straight rod 20 and the platform 10, the upper surface of the platform 10 is provided with at least one first connection seat 11, and the first connection seat 11 protrudes from the upper surface of the platform 10. The outer side surface of the first connection base 11 is provided with a connection hole 110, and one end of the straight rod 20 is inserted into the connection hole 110. Wherein, one end of the straight rod 20 can be matched with the connecting hole 110 through threads or a unthreaded hole.
In order to prevent the straight rod 20 from falling off, the hanger mounting and dismounting device further comprises at least one latch 40. The upper surface of the first connecting seat 11 is provided with a pin hole 111 communicated to the connecting hole 110; one end of the straight rod 20 is provided with a through hole matched with the bolt 40. The bolt 40 enters the connecting hole 110 through the pin hole 111 and is inserted into the through hole of the straight rod 20, so that one end of the straight rod 20 is fixed on the first connecting seat 11. The opposite end of the straight rod 20 extends horizontally outwards along the surface of the main pump seat body on the periphery of the sealed static ring assembly 1 to serve as a lifting point for connecting lifting equipment.
The end of the straight rod 20 away from the hanging scaffold 10 is provided with a first handle 21 as a hanging point of the straight rod 20. As shown in fig. 1 and 2, the first handle 21 may be i-shaped.
The bent rod 30 is bent relative to the straight rod 20, and may be substantially L-shaped. One end of the bent rod 30 is inserted into the first coupling seat 11 of the platform 10 in parallel with the platform 10. Similarly, as for the straight rod 20, one end of the curved rod 30 is inserted into the connecting hole 110 of the first connecting seat 11, and further, the bolt 40 enters the connecting hole 110 through the pin hole 111 and is inserted into the through hole of the curved rod 30, so as to fix one end of the curved rod 30 on the first connecting seat 11. The opposite end (the end far from the hanging scaffold 10) of the bent rod 30 is bent downward relative to the end connected with the hanging scaffold 10 and extends downward along the axial direction of the sealing static ring assembly 1. The end of the bent rod 30 remote from the platform 10 is provided with a second handle 31 extending transversely as a lifting point for the bent rod 30 for connection of a lifting device.
Preferably, the demountable hanger device of the present invention comprises two straight bars 20 and two bent bars 30. Two first connecting seats 11 are arranged on the hanging scaffold 10, and the two first connecting seats 11 are positioned at two opposite sides of the hanging scaffold 10.
As shown in fig. 2 and 4, in the hanger apparatus for mounting and dismounting of the present invention, the hanger 10 and the stationary seal ring assembly 2 are lifted to a first height by the straight rod 20, and then the hanger 10 and the stationary seal ring assembly 2 are lifted to a second height after the bent rod 30 is replaced. In order to maintain the platform 10 and the stationary seal ring assembly 1 at a first height when the knee lever 30 is replaced, the demountable hanger apparatus of the present invention further comprises at least one bracket 50 for positioning the platform 10 and the stationary seal ring assembly 1 at the first height.
Correspondingly, the upper surface of the hanging scaffold 10 is provided with at least one second connecting seat 12. The second coupling seat 12 protrudes on the upper surface of the platform 10 and also radially protrudes outside the stationary seal ring assembly 1. The bracket 50 is placed outside the seal stationary ring assembly 1 and supported below the second coupling seat 12. When the hanging scaffold 10 and the static sealing ring assembly 1 are lifted to the first height, the bracket 50 is placed on the main pump seat body at the periphery of the static sealing ring assembly 1, and the top of the main pump seat body is supported under the second connecting seat 12, so that the static sealing ring assembly 1 is positioned at the first height.
In this embodiment, as shown in fig. 5, the stand 50 has a vertical structure. The top of the bracket 50 is provided with a U-shaped positioning slot 51, and the second connecting seat 12 is fitted in the U-shaped positioning slot 51.
The dismounting and mounting hanger device is used for dismounting the sealing static ring assembly 1 and is also used for dismounting the sealing static ring assembly 1. Wherein, the disassembly of the sealing static ring component 1 can comprise the following steps:
and S1, mounting the hanging scaffold 10 on the supporting cylinder of the sealing static ring assembly 1, and connecting the straight rod 20 to the hanging scaffold 10, as shown in figures 1 and 2.
And S2, connecting and hoisting the hoisting equipment with the straight rod 20, and hoisting the hanging scaffold 10 and the sealing static ring assembly 1 to a first height, wherein the height of the sealing static ring assembly 1 is as shown in FIG. 4.
Specifically, the lifting device is connected with the first handle 21 of the straight rod 20 through a sling, and the straight rod 20 is lifted, so that the hanging scaffold 10 and the sealing static ring assembly 1 connected with the straight rod are lifted.
After the hanging scaffold 10 and the static sealing ring assembly 1 are lifted to the first height, the bracket 50 is placed on the outer side of the static sealing ring assembly 1, and the hanging scaffold 10 and the static sealing ring assembly 1 are supported on the bracket 50 through the second connecting seat 12 on the hanging scaffold 10, and are positioned at the first height, as shown in fig. 4.
S3, removing the straight rods 20 and attaching the bent rods 30 to the platform 10, as shown in fig. 3.
The position of the bent rod 30 connected to the platform 10 is the same as the position of the straight rod 20 connected to the platform, and the bent rod and the straight rod are the first connecting seats 11.
And S4, connecting the lifting equipment with the bent rod 30, lifting, and lifting the hanging scaffold 10 and the sealing static ring assembly 1 to a second height which is higher than the shaft head of the main pump shaft 2.
Specifically, the second handle 31 of the curved bar 30 is connected through the hoist cable to the hoisting equipment, and through hoisting the curved bar 30, the hanging scaffold 10 and the sealed stationary ring subassembly 1 connected with the curved bar are hoisted until the sealed stationary ring subassembly 1 is higher than the spindle nose of the main pump shaft 2, and the sealed stationary ring subassembly 1 is separated from the sealed chamber, and at the moment, the sealed stationary ring subassembly 1 can be transported out to finish the disassembly.
When the dismounting and mounting hanger device is used for dismounting the sealing static ring assembly 1, the steps are opposite to those of dismounting. Namely: the bent rod 30 is connected to the hanging scaffold 10, the hanging scaffold 10 and the sealing static ring assembly 1 are hung to the periphery of the main pump shaft 2 and enter the sealing chamber, and the hanging scaffold is placed at the first height. The bracket 50 is placed on the outer side of the static sealing ring assembly 1, and the hanging scaffold 10 and the static sealing ring assembly 1 are positioned at a first height by being supported on the bracket 50 through the second connecting seat 12 on the hanging scaffold 10. And (3) detaching the bent rod 30, connecting the straight rod 20 to the hanging scaffold 10, removing the bracket 50, connecting the straight rod 20 by the hoisting equipment, and continuously lowering the hanging scaffold 10 and the sealing static ring assembly 1 until the sealing static ring assembly 1 enters the sealing chamber. And the hanging bracket dismounting device is dismounted after the hanging bracket is in place.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A dismounting and mounting hanger device for a sealing static ring assembly of a main pump of a nuclear power station is characterized by comprising a hanging scaffold, at least one straight rod and at least one bent rod, wherein the hanging scaffold is used for being fixed on a supporting cylinder of the sealing static ring assembly;
the second height is greater than the first height and higher than the spindle head of the main pump shaft;
on the hanging scaffold, the straight rod extends outwards along the radial direction of the sealing static ring assembly;
and one end of the bent rod is connected with the hanging scaffold, and the other end of the bent rod extends downwards at the periphery of the sealing static ring assembly.
2. The device of claim 1, wherein the platform has at least one first connector on an upper surface thereof; the outer side surface of the first connecting seat is provided with a connecting hole;
one end of the straight rod or one end of the bent rod is inserted into the connecting hole.
3. The knock-out hanger apparatus of claim 2, further comprising at least one latch;
the upper surface of the first connecting seat is provided with a pin hole communicated to the connecting hole; one end of the straight rod and one end of the bent rod are respectively provided with a through hole matched with the bolt;
and the bolt enters the connecting hole through the pin hole and is inserted into the through hole of the straight rod or the bent rod, so that one end of the straight rod or the bent rod is fixed on the first connecting seat.
4. The device as claimed in claim 1, wherein the hanging scaffold is a ring structure, and has a plurality of mounting holes corresponding to the bolt holes on the supporting cylinder; and bolts are arranged in the mounting holes and the bolt holes in a penetrating manner, so that the hanging scaffold is fastened on the supporting cylinder.
5. The device for disassembling and assembling the hanging bracket according to claim 1, wherein a first handle is arranged at one end of the straight rod far away from the hanging scaffold and used as a hanging point of the straight rod;
and one end of the bent rod, which is far away from the hanging scaffold, is provided with a second handle which extends transversely and is used as a hanging point of the bent rod.
6. The dismouting hanger apparatus of claim 1 further comprising at least one bracket for positioning the platform and seal stationary ring assembly at the first height;
the upper surface of the hanging scaffold is provided with at least one second connecting seat; the second connecting seat radially protrudes out of the outer side of the sealing static ring component; the bracket is placed on the outer side of the sealing static ring assembly and supported below the second connecting seat.
7. The demountable hanger apparatus of claim 6, wherein the top of said bracket is provided with a U-shaped positioning slot, and said second connection seat is fitted in said U-shaped positioning slot.
8. A method for dismounting and mounting a sealing static ring assembly of a main pump of a nuclear power station, which is characterized in that a dismounting and mounting hanger device of any one of claims 1-7 is adopted, and the dismounting and mounting method comprises dismounting the sealing static ring assembly; the disassembling comprises the following steps:
s1, mounting a hanging scaffold on a supporting cylinder of the sealing static ring assembly, and connecting a straight rod to the hanging scaffold;
s2, connecting a lifting device with the straight rod and lifting, and lifting the hanging scaffold and the sealing static ring assembly to a first height;
s3, detaching the straight rod, and connecting the bent rod to the hanging scaffold;
and S4, connecting the hoisting equipment with the bent rod and hoisting, and hoisting the hanging scaffold and the sealing static ring assembly to a second height which is higher than the shaft head of the main pump shaft.
9. The method of removing and assembling of claim 8, further comprising, after step S2: and a bracket is arranged on the outer side of the sealing static ring assembly, the bracket is supported on the bracket through a second connecting seat on the hanging scaffold, and the hanging scaffold and the sealing static ring assembly are positioned at the first height.
10. The method of claim 8, further comprising the step of back-loading the seal ring assembly; the step of reinstalling is the reverse of the step of disassembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010737320.0A CN111977500B (en) | 2020-07-28 | 2020-07-28 | Dismounting hanger device and dismounting method for nuclear power station main pump seal static ring assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010737320.0A CN111977500B (en) | 2020-07-28 | 2020-07-28 | Dismounting hanger device and dismounting method for nuclear power station main pump seal static ring assembly |
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| Publication Number | Publication Date |
|---|---|
| CN111977500A true CN111977500A (en) | 2020-11-24 |
| CN111977500B CN111977500B (en) | 2022-03-25 |
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| CN202010737320.0A Active CN111977500B (en) | 2020-07-28 | 2020-07-28 | Dismounting hanger device and dismounting method for nuclear power station main pump seal static ring assembly |
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| CN (1) | CN111977500B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113526323A (en) * | 2021-07-02 | 2021-10-22 | 哈尔滨电气动力装备有限公司 | Nuclear main pump multi-component combined hoisting method |
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| CN111977500B (en) | 2022-03-25 |
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