CN217045336U - Nuclear power plant reactor coolant pump piston ring dismouting device - Google Patents
Nuclear power plant reactor coolant pump piston ring dismouting device Download PDFInfo
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- CN217045336U CN217045336U CN202123415747.8U CN202123415747U CN217045336U CN 217045336 U CN217045336 U CN 217045336U CN 202123415747 U CN202123415747 U CN 202123415747U CN 217045336 U CN217045336 U CN 217045336U
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- shaft sleeve
- supporting shaft
- piston ring
- sleeve
- hole
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Abstract
The utility model relates to a nuclear power overhauls technical field, specifically discloses a nuclear power plant's reactor coolant pump piston ring dismouting device, wherein is equipped with the screw thread guiding hole on the lateral wall of supporting axle sleeve A, is equipped with the through-hole guiding hole on the lateral wall of supporting axle sleeve B, and screw thread guiding hole and through-hole guiding hole all lead with the screw rod cooperation; the supporting shaft sleeve A and the supporting shaft sleeve B are respectively arranged in the cylindrical shaft holes of the two fixing blocks B; and the guide holes of the supporting shaft sleeve A and the supporting shaft sleeve B are respectively aligned with the screw through holes of the two fixing blocks B. The utility model discloses dismouting device simple structure, it is easy and simple to handle, dismouting time that can significantly reduce to avoid too much radioactivity to shine the risk, guarantee maintainer's maintenance safety.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power overhauls, concretely relates to nuclear power plant's reactor coolant pump piston ring dismouting device.
Background
The reactor coolant pump, also called the main pump, is the only high-speed rotating device in the reactor coolant system, and is used to drive the high-temperature, high-pressure, radioactive coolant, so that the coolant can pass through the reactor core at a very large flow rate, and the heat generated in the core can be transferred to the steam generator, which is one of the most critical rotating machines in the nuclear power plant.
The piston ring is an elastic metal ring embedded in the groove of the part and has large outward expansion and deformation capacity. The piston ring that this device relates installs in main pump insulator slot, and the compression spring of cooperation pre-installation forms sealedly between main pump insulator and seal chamber, and isolated a return circuit high temperature establishes the long-term steady operation's low temperature environment for non-high temperature resistant parts such as mechanical seal.
Because the piston ring has great internal stress, the manpower installation is difficult, and leads to the piston ring to warp and then influences sealed effect easily. Therefore, in order to conveniently, reliably and standardize the installation of the piston ring, a special installation auxiliary device needs to be designed for disassembling and installing the piston ring in the maintenance of the main pump.
Disclosure of Invention
An object of the utility model is to provide a nuclear power plant's reactor coolant pump piston ring dismouting device can conveniently realize the dismouting of reactor coolant pump piston ring.
The technical scheme of the utility model as follows:
a nuclear power plant reactor coolant pump piston ring dismounting device comprises a fixing part, a guide part and an adjusting part;
the fixing component comprises a fixing block A, a fixing block B, a screw A, a screw B and a pin;
the number of the fixed blocks A is two, and two bolt holes are respectively processed on each fixed block A and matched with four bolt holes on two sides of an opening on the piston ring;
the two fixed blocks A are respectively fixed on two sides of an opening of the piston ring by mounting four screws A;
the two fixing blocks B are respectively arranged on the two fixing blocks A through positioning pins and screws B;
a cylindrical shaft hole and a screw rod through hole which are vertically crossed are processed in the fixed block B;
the guide component comprises a support shaft sleeve A and a support shaft sleeve B;
the supporting shaft sleeve A and the supporting shaft sleeve B are cylindrical shaft sleeve structures provided with guide holes along the radial direction and are matched with the screw rod for guiding;
the side wall of the supporting shaft sleeve A is provided with a thread guide hole, the side wall of the supporting shaft sleeve B is provided with a through hole guide hole, and the thread guide hole and the through hole guide hole are matched with the screw rod for guiding;
the supporting shaft sleeve A and the supporting shaft sleeve B are respectively arranged in cylindrical shaft holes of the two fixing blocks B; guide holes of the supporting shaft sleeve A and the supporting shaft sleeve B are respectively aligned with screw through holes of the two fixing blocks B;
the adjusting component comprises a screw and a sleeve;
one end of the screw is provided with a plug, and the outer surface of the screw is provided with an external thread;
the screw rod sequentially penetrates through the guide hole of the supporting shaft sleeve B, the sleeve and the guide hole of the supporting shaft sleeve A, so that the supporting shaft sleeve B is abutted against the plug by the sleeve;
the supporting shaft sleeve A is connected with the screw rod through threads.
And two grooves are processed in each cylindrical shaft hole of the fixed block B.
The guide part still include jump ring A, jump ring A have four, locate the slot department in the fixed block B cylindrical shaft hole respectively to carry out axial spacing to supporting axle sleeve A and supporting axle sleeve B.
One end of the sleeve, far away from the supporting shaft sleeve B, is limited through a clamp spring B fixed on the screw rod.
The inner surface of the fixed block A is processed into an arc surface and is consistent with the curvature radius of the outer surface of the piston ring.
The two fixing blocks B are both in a cuboid shape.
The locating pin fix a position fixed block A and fixed block B to ensure that both circumference angle is adjustable, fixed block A and fixed block B are fixed to the convenience after screw B installation hole site alignment.
When the screw rod is rotated, the external thread of the screw rod and the internal thread of the supporting shaft sleeve A move relatively, the length of the screw rod between the supporting shaft sleeve A and the supporting shaft sleeve B is changed, the distance between the two fixing blocks B can be adjusted, and then the distance between the two fixing blocks A is adjusted, so that the expansion and the tightening deformation of the piston ring are realized.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses the dismouting device is equipped with direction and location structure, can adjust piston ring expansion angle in order to satisfy dismouting dimensional requirement accurately.
(2) The utility model discloses dismouting device is equipped with the screw rod structure, replaces the manpower dismouting, can conveniently balance the piston ring internal stress, and the piston ring warp when avoiding the dismouting.
(3) The utility model discloses the dismouting device has spacing regulatory function, can ensure piston ring installation quality, avoids losing the risk of the sealed function of former design, improves the maintenance quality of main pump.
(4) The utility model discloses dismouting device simple structure, it is easy and simple to handle, dismouting time that can significantly reduce to avoid too much radioactivity to shine the risk, guarantee maintainer's maintenance safety.
Drawings
FIG. 1 is a front view of a piston ring mounting and dismounting device;
FIG. 2 is a view taken along line C-C of FIG. 1;
FIG. 3 is a view from direction D-D of FIG. 1;
fig. 4 is a plan view of the piston ring mounting and dismounting device.
In the figure: 1. a fixed block A; 2. a fixed block B; 3. a supporting shaft sleeve A; 4. a supporting shaft sleeve B; 5. a screw; 6. a sleeve; 7. a screw A; 8. a screw B; 9. a pin; 10. a piston ring; 11. a clamp spring A; 12. and a clamp spring B.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The device for dismounting the piston ring of the nuclear power plant reactor coolant pump shown in figures 1-4 comprises a fixing part, a guide part and an adjusting part.
The fixing part consists of a fixing block A1, a fixing block B2, a screw A7, a screw B8 and a pin 9.
The number of the fixed blocks A1 is two, and the inner surface of each fixed block A1 is processed into an arc surface and is consistent with the curvature radius of the outer surface of the piston ring 10. Two bolt holes which are arranged along the radial direction are respectively processed on each fixed block A1 and are matched with four bolt holes on two sides of an opening on the piston ring 10; two fixing blocks A1 are respectively fixed on two sides of the opening of the piston ring 10 by installing four screws A7.
The two fixing blocks B2 are in a cuboid shape and are respectively installed on the two fixing blocks A1 through positioning pins 9 and screws B8. The positioning pin 9 positions the fixing block A1 and the fixing block B2, and ensures that the circumferential angle of the fixing block A1 and the fixing block B2 is adjustable, so that the fixing block A1 and the fixing block B2 can be conveniently fixed after the screw B8 is installed and the hole position is aligned. And a cylindrical shaft hole and a screw through hole which are vertically crossed are processed in the fixed block B2, and two grooves are processed in each cylindrical shaft hole.
The guide part comprises a supporting shaft sleeve A3, a supporting shaft sleeve B4 and a clamp spring A11.
The supporting shaft sleeve A3 and the supporting shaft sleeve B4 are cylindrical shaft sleeve structures provided with guide holes along the radial direction, wherein the center of the side wall of the supporting shaft sleeve A3 is provided with a thread guide hole, the center of the side wall of the supporting shaft sleeve B4 is provided with a through hole guide hole, and the thread guide hole and the through hole guide hole are matched and guided with the screw rod 5. The supporting shaft sleeve A3 and the supporting shaft sleeve B4 are respectively arranged in cylindrical shaft holes of the two fixing blocks B2 to form clearance fit of the shaft and the holes, and the two fixing blocks B2 and the holes can rotate around a coaxial line; and the guide holes of the supporting shaft sleeve A3 and the supporting shaft sleeve B4 are respectively aligned with the screw through holes of the two fixing blocks B2.
The number of the clamp springs A11 is four, and the four clamp springs are respectively arranged at the groove in the cylindrical shaft hole of the fixing block B2 so as to axially limit the supporting shaft sleeve A3 and the supporting shaft sleeve B4.
The adjusting part consists of a screw rod 5, a sleeve 6 and a clamp spring B12.
And one end of the screw rod 5 is provided with a plug, and the outer surface of the screw rod is provided with an external thread. The screw 5 passes through the supporting sleeve B4, the sleeve 6 and the supporting sleeve A3 in sequence, so that the supporting sleeve B4 is abutted against the plug by the sleeve 6. One end of the sleeve 6, which is far away from the supporting shaft sleeve B4, is limited by a snap spring B12 fixed on the screw rod 5. The supporting shaft sleeve A3 is in threaded connection with the screw rod 5, when the screw rod 5 is rotated, the external threads of the screw rod 5 and the internal threads of the supporting shaft sleeve A3 move relatively, the length of the screw rod 5 between the supporting shaft sleeve A3 and the supporting shaft sleeve B4 is changed, the distance between the two fixing blocks B2 can be adjusted, the distance between the two fixing blocks A1 is further adjusted, and therefore opening and tightening deformation of the piston ring 10 are achieved.
The piston ring dismounting device comprises the following specific using steps:
(1) lubricating the matching surfaces among the piston ring mounting groove, the piston ring and the parts of the piston ring dismounting device by using an anti-biting agent;
(2) the supporting shaft sleeve A3 is arranged in a fixing block B2 and fixed by a clamp spring A11;
(3) the supporting shaft sleeve B4 is arranged in a fixed block B2 and is fixed by a clamp spring A11;
(4) two groups of fixed blocks A1 and B2 are connected by pins 9, and at the moment, the fixed blocks A1 and B2 can freely rotate around the pins 9;
(5) a fixed block A1 is arranged on the piston ring 10 by a screw A7;
(6) the screw 5 is threaded into the supporting shaft sleeve B4, and the threading direction is checked;
(7) the sleeve 6 is threaded into the screw;
(8) screwing the other end of the screw rod 5 into the thread of the supporting shaft sleeve A3 and penetrating out of the supporting shaft sleeve A3, rotating the screw rod 5, and adjusting the opening size of the piston ring to enable the piston ring to be in a free state basically;
(9) fixing the fixing block A1 and the fixing block B2 by a screw B8;
(10) installing a snap spring B12, fixing the sleeve 6, the screw rod 5 and a supporting shaft sleeve B4;
(11) the opening of the piston ring is adjusted to a proper size by rotating the screw rod 5, and the disassembly and assembly of the piston ring are completed.
The basic principles, main features and advantages of the present invention have been shown and described, it will be obvious to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (7)
1. The utility model provides a nuclear power plant's reactor coolant pump piston ring dismouting device which characterized in that: comprises a fixing component, a guide component and an adjusting component;
the fixing component comprises a fixing block A (1), a fixing block B (2), a screw A (7), a screw B (8) and a pin (9);
the number of the fixed blocks A (1) is two, and two bolt holes are respectively processed on each fixed block A (1) and matched with four bolt holes on two sides of an opening on the piston ring (10);
the two fixed blocks A (1) are respectively fixed on two sides of an opening of the piston ring (10) by installing four screws A (7);
the two fixing blocks B (2) are respectively arranged on the two fixing blocks A (1) through positioning pins (9) and screws B (8);
a cylindrical shaft hole and a screw rod through hole which are vertically crossed are processed in the fixed block B (2);
the guide component comprises a support shaft sleeve A (3) and a support shaft sleeve B (4);
the supporting shaft sleeve A (3) and the supporting shaft sleeve B (4) are cylindrical shaft sleeve structures provided with guide holes along the radial direction and are matched with the screw rod (5) for guiding;
the side wall of the supporting shaft sleeve A (3) is provided with a thread guide hole, the side wall of the supporting shaft sleeve B (4) is provided with a through hole guide hole, and the thread guide hole and the through hole guide hole are matched with the screw rod (5) for guiding;
the supporting shaft sleeve A (3) and the supporting shaft sleeve B (4) are respectively arranged in cylindrical shaft holes of the two fixing blocks B (2); guide holes of the supporting shaft sleeve A (3) and the supporting shaft sleeve B (4) are respectively aligned with screw through holes of the two fixing blocks B (2);
the adjusting component comprises a screw rod (5) and a sleeve (6);
one end of the screw rod (5) is provided with a plug, and the outer surface of the screw rod is provided with an external thread;
the screw (5) sequentially penetrates through a guide hole of the supporting shaft sleeve B (4), the sleeve (6) and a guide hole of the supporting shaft sleeve A (3), so that the supporting shaft sleeve B (4) is abutted against the plug by the sleeve (6);
the supporting shaft sleeve A (3) is connected with the screw rod (5) through threads.
2. The device for dismounting a piston ring of a nuclear power plant reactor coolant pump as claimed in claim 1, wherein: and two grooves are processed in each cylindrical shaft hole of the fixed block B (2).
3. The device for dismounting a piston ring of a nuclear power plant reactor coolant pump as claimed in claim 2, wherein: the direction part still include jump ring A (11), jump ring A (11) have four, locate the downthehole slot department of fixed block B (2) cylinder shaft respectively to it is spacing to carry out the axial to supporting axle sleeve A (3) and supporting axle sleeve B (4).
4. The device for dismounting a piston ring of a nuclear power plant reactor coolant pump as claimed in claim 1, wherein: one end, far away from the supporting shaft sleeve B (4), of the sleeve (6) is limited through a clamp spring B (12) fixed on the screw rod (5).
5. The device for dismounting and mounting a piston ring of a nuclear power plant reactor coolant pump as claimed in claim 1, wherein: the inner surface of the fixed block A (1) is processed into an arc surface which is consistent with the curvature radius of the outer surface of the piston ring (10).
6. The device for dismounting a piston ring of a nuclear power plant reactor coolant pump as claimed in claim 1, wherein: the two fixed blocks B (2) are both in a cuboid shape.
7. The device for dismounting and mounting a piston ring of a nuclear power plant reactor coolant pump as claimed in claim 1, wherein: positioning pin (9) fix a position fixed block A (1) and fixed block B (2) to ensure that both circumference angle is adjustable, conveniently install fixed block A (1) and fixed block B (2) after the hole site alignment in screw B (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123415747.8U CN217045336U (en) | 2021-12-31 | 2021-12-31 | Nuclear power plant reactor coolant pump piston ring dismouting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123415747.8U CN217045336U (en) | 2021-12-31 | 2021-12-31 | Nuclear power plant reactor coolant pump piston ring dismouting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217045336U true CN217045336U (en) | 2022-07-26 |
Family
ID=82480108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123415747.8U Active CN217045336U (en) | 2021-12-31 | 2021-12-31 | Nuclear power plant reactor coolant pump piston ring dismouting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217045336U (en) |
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2021
- 2021-12-31 CN CN202123415747.8U patent/CN217045336U/en active Active
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