CN113829252B - Fixing device and fixing method for installing reactor core vibration detector - Google Patents
Fixing device and fixing method for installing reactor core vibration detector Download PDFInfo
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- CN113829252B CN113829252B CN202111036496.4A CN202111036496A CN113829252B CN 113829252 B CN113829252 B CN 113829252B CN 202111036496 A CN202111036496 A CN 202111036496A CN 113829252 B CN113829252 B CN 113829252B
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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
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention belongs to the technical field of mechanical fixing of reactor core vibration detectors, and particularly relates to a fixing device and a fixing method for installing reactor core vibration detectors, wherein the fixing device comprises the following steps: a core vibration detector; the detector comprises a detector ring-shaped base, an upper component metal upright post, a right-angle connecting piece, a U-shaped connecting piece and a fixing bolt; the device of the invention connects the upper assembly metal upright post with the right-angle connecting piece of the fixing device through the U-shaped connecting piece under the condition that the shape of the fixed detector is not changed and the surface of the upper assembly metal upright post is not damaged, and the problem of installation of the detector after displacement is effectively solved by adopting a mode of fixing the detector on the right-angle connecting piece of the fixing device.
Description
Technical Field
The invention belongs to the technical field of mechanical fixing of reactor core vibration detectors, and particularly relates to a fixing device and a fixing method for installing reactor core vibration detectors.
Background
Absolute displacement detectors, hereinafter referred to as core vibration detectors) provide vertical low frequency vibration signals of the reactor pressure vessel during operation of the reactor at different power levels. The sensor is fixed on the end surfaces of 4 bolts which are arranged on the main joint surface of the reactor pressure vessel before, and a nut matched with the bolts is used for converting a low-frequency vibration signal into an electric signal through an inductance principle. The core vibration detector is installed in the heat shielding layer of the reactor pressure vessel, the temperature of the working environment of the detector is close to 300 ℃ during the operation of the unit, and the radiation dosage of the region is high. Long-term operation in harsh environments can lead to frequent failure of the detector. According to statistics, during the ten fuel cycles before the operation of the No. 1/2 unit of a certain nuclear power station, the phenomenon that the power supply is unstable and the insulation is reduced so that the fault rate of the detector is high occurs at different times for a total of 8 detectors of the two units. Meanwhile, during overhaul, the core vibration detector is disassembled and assembled to work, and the radiation dosage of the working environment is high, so that the radiation dosage received by the staff is high. In the state of long-period refueling of the follow-up unit, the running condition of the current reactor core vibration detector cannot guarantee reliable running for 18 months, and the requirement of the technical manual on the running reliability of the detector cannot be met.
Therefore, in order to ensure the reliable operation of the detector and reduce the temperature and radiation dose of the environment where the reactor core vibration detector works, a fixing device and a fixing method for installing the reactor core vibration detector are designed on the basis of not affecting the inherent diagnostic performance of the detector so as to solve the technical problems.
Disclosure of Invention
Aiming at the prior art, the invention provides a fixing device and a fixing method for installing a reactor core vibration detector, which are used for solving the technical problem that the reactor core vibration detector is fixed in a heat shielding layer of a reactor pressure vessel in the prior art, and the detector is easy to frequently fail due to high radiation dose caused by high working environment temperature during the running period of a unit.
The technical scheme of the invention is as follows:
a fixture for mounting a core vibration detector, comprising: a core vibration detector; the detector comprises a detector ring-shaped base, an upper component metal upright post, a right-angle connecting piece, a U-shaped connecting piece and a fixing bolt;
the right angle connector includes: the device comprises a right-angle connecting piece vertical surface, a right-angle connecting piece horizontal surface, a plurality of clamping blocks, a base round opening, a plurality of connecting pieces and a rubber ring; the right-angle connecting piece is characterized in that a base round opening is formed in the horizontal plane of the right-angle connecting piece, a plurality of clamping blocks are uniformly distributed on the edge of the base round opening, a plurality of connecting pieces are uniformly distributed on the inner wall of the base round opening, and a rubber ring is placed on the upper surface of each connecting piece; the reactor core vibration detector is fixedly arranged on the upper surface of the annular detector base, a plurality of screw holes are uniformly distributed on the upper surface of the annular detector base, and the annular detector base is in threaded connection with the horizontal plane of the right-angle connecting piece through a fixing bolt;
the U-shaped connecting piece is connected with the vertical surface of the right-angle connecting piece, and the ring sleeve is fixed on the outer surface of the metal upright post of the upper assembly.
The U-shaped connector comprises: the device comprises an arc-shaped plate, a pull rod, a screw rod, a cross rod, a sliding sleeve, a connecting plate and a limiting mechanism; the two ends of the arc-shaped plate are respectively connected with a pull rod and a cross rod; a screw rod is arranged at one end part of the pull rod, which is not connected with the arc-shaped plate; a cross rod connecting rod is arranged at one end part of the cross rod, which is not connected with the arc plate, a sliding sleeve is sleeved on the cross rod connecting rod, and a connecting plate is fixedly connected to the sliding sleeve; a limiting mechanism is arranged on the pull rod; the screw rod is also provided with a screw cap.
And a plurality of rubber strips are uniformly distributed on the arc-shaped plate, and when the U-shaped connecting piece is sleeved on the outer surface of the upper component metal upright post, the rubber strips are tightly attached to the outer surface of the upper component metal upright post.
The limit mechanism comprises: the device comprises limit bolts, rectangular blocks, two limit rods, a positioning plate, rectangular rods, a limit frame and a rectangular sleeve; the limiting frame is provided with a rectangular sleeve, two ends of the limiting frame are fixedly arranged on the pull rod, the rectangular sleeve is fixedly connected with a positioning plate, and the outer surface of the positioning plate is also provided with a first clamping part; the same ends of the two limiting rods are fixedly connected through rectangular blocks, and limiting bolts are arranged on the rectangular blocks; one ends of the rectangular blocks which are not fixed by the two limiting rods penetrate out of the perpendicular surface of the right-angle connecting piece, and one ends of the rectangular blocks arranged on the two limiting rods are fixed on the perpendicular surface of the right-angle connecting piece through limiting bolts.
The second clamping parts are arranged on each limiting rod, and the second clamping parts on each limiting rod are clamped with the first clamping parts on the positioning plate.
A plurality of notches are symmetrically arranged on one side edge of the vertical surface of the right-angle connecting piece; the screw rod passes through the notch and is fixedly connected with the vertical surface of the right-angle connecting piece through a nut, and the inner diameter of the notch is matched with the outer diameter of the screw rod.
The same side surface of the right-angle connecting piece, on which the U-shaped connecting piece is arranged, is also provided with a supporting plate; the support plate includes: the device comprises a plurality of arc rubber blocks, a plurality of arc push plates and an adjusting bolt; the supporting plate is fixedly arranged on the surface of the vertical surface of the right-angle connecting piece through an adjusting bolt; a through groove is further formed in the surface of the supporting plate, and a plurality of arc-shaped rubber blocks are fixedly connected in the through groove; and each arc-shaped rubber block is fixedly connected with an arc-shaped push plate through an adjusting bolt.
And each arc-shaped rubber block is uniformly provided with a plurality of cylindrical grooves.
The arc push plate is clung to the outer surface of the metal upright post of the upper component.
A shaft pin is further arranged at one end part of the adjusting bolt fixed connection supporting plate, and the adjusting bolt is in sliding connection with the arc-shaped push plate through the shaft pin; one end of the shaft pin is fixedly connected with a limiting piece.
A plurality of openings are also uniformly distributed on the side wall of the annular base of the detector, and each clamping block on the circular opening of the base corresponds to the opening clamped on the corresponding position of the side wall of the annular base of the detector.
The fixing bolts penetrate into threaded holes in the upper surface of the annular base of the detector, and sequentially penetrate through the rubber rings and the connecting sheets from top to bottom to enable the annular base of the detector to be in threaded connection with the horizontal plane of the right-angle connecting piece.
A fixing method for a fixing device for installing a core vibration detector, comprising the steps of:
step one: sleeving a U-shaped connecting piece on the surface of a metal upright post of the upper component;
step two: fastening a reactor core vibration detector fixing device;
step three: and installing a reactor core vibration detector.
The first step further comprises: the arc on the U type connecting piece is pressed earlier, the arc drives the horizontal pole after the atress and makes the sliding sleeve rotate on the pole wall of horizontal pole connecting rod, and then make the arc be circular motion around the central line of horizontal pole connecting rod, drive the pull rod when the arc moves, make the lead screw on the pull rod remove to in the breach, then press the rectangle piece and make the gag lever post slide to the locating plate direction, when the gag lever post slides, the second joint portion on the gag lever post slides the joint with the first joint portion on the locating plate, and then will dock fast to U type connecting piece and right angle connecting piece, accomplish the loop cover of U type connecting piece on carrying out upper portion subassembly metal stand surface and fix.
The second step further comprises: the U-shaped connecting piece is fixedly connected with the perpendicular face of the right-angle connecting piece through the nut on the screw rod, the clamping position between the limiting rod and the positioning plate can be driven through adjusting the limiting bolt, then the arc plate and the rubber strip on the U-shaped connecting piece are driven to be compressed on the surface of the upper assembly metal upright, when the arc plate presses the surface of the upper assembly metal upright, the supporting plate on the right-angle connecting piece presses the arc rubber block to deform, negative pressure suction force is generated between the air discharged in the cylindrical groove on the arc rubber block and the surface of the upper assembly metal upright, and the reactor core vibration detector fixing device is fastened, so that the fixing device is not easy to loose, and loose sliding phenomenon between the fixing device and the metal upright is avoided.
The third step further comprises: when the detector is installed, the notch on the annular base of the detector is aligned with the clamping block, the annular base of the detector is placed in the circular opening of the base after the alignment, then the reactor core vibration detector is rotated anticlockwise to enable the notch on the annular base of the detector to be clamped with the clamping block, then the fixing bolt is used for penetrating through the through hole on the annular base of the detector and screwing the fixing bolt, and the annular base of the detector is connected with the horizontal plane of the right-angle connecting piece through threads, so that the installation of the detector is completed.
The invention has the beneficial effects that:
the fixing device designed by the invention can effectively transfer the vibration of the reactor core to the detector by stably mounting the reactor core vibration detector on the upper component metal upright post without affecting the sensitivity of the detector.
2 the fixing device fixedly installs the core vibration detector on the outer surface of the upper assembly metal upright post through the U-shaped connecting piece and the right-angle connecting piece under the condition that the shape of the core vibration detector is not changed and the upper assembly metal upright post is not damaged.
The limiting mechanism arranged on the U-shaped connecting piece can rapidly clamp, limit and fix the fixing device on the outer surface of the upper component metal upright post, so that subsequent installation and fixation of workers are facilitated.
And 4, a rubber block is arranged on a supporting plate arranged on the right-angle connecting piece in the device, a plurality of cylindrical grooves are further formed in the rubber block, and the rubber block is extruded to deform, so that air is discharged from the cylindrical grooves in the rubber block, negative pressure suction force can be generated between the cylindrical grooves in the rubber block and the outer surface of the upper component metal upright post, friction force between the U-shaped connecting piece and the outer surface of the upper component metal upright post can be increased by utilizing the rubber strip arranged on the U-shaped connecting piece, and the fixing device designed by the device is not easy to loosen, so that loose sliding phenomenon between the fixing device and the metal upright post is avoided.
The invention solves the problem that the detector cannot be installed after being shifted from the heat shielding layer of the original reactor pressure vessel by fixing the bottom of the reactor core vibration detector on the annular base of the device.
The technical scheme of the invention has better reference significance for the problem of fixing and installing other detection vibration detectors which need to be fixed on the round object, and the device can be suitable for the situation that different types of detection vibration detectors are installed on the cylindrical object by changing the shape of the annular base of the right-angle connecting piece, the positions of the bolt holes and the size of the U-shaped connecting piece.
7 when the diameter of the upper assembly metal upright post is changed, the adjusting bolt and the arc-shaped push plate in the device can be used for adapting and adjusting the size between the U-shaped connecting piece and the right-angle connecting piece so as to meet the requirement of being arranged on the outer surface of the upper assembly metal upright post with different diameters; and the adjusting bolt and the arc-shaped push plate can be rotationally connected through the shaft pin, so that the clamping stagnation phenomenon between the arc-shaped push plate and the upper component metal upright post is avoided when the adjusting bolt rotates.
And a rubber ring is arranged between the annular base of the detector 8 and the connecting sheet, and can avoid the rigid connection between the connecting sheet and the annular base, so that the fixing bolts for fixing the annular base of the detector are not easy to loosen, and the phenomenon that the annular base of the detector is connected with the right-angle connecting piece loose can be avoided.
9 after the fixing device designed by the invention is put into use, signals of the absolute displacement detectors are regularly called by the upper computer during normal operation of the unit, and analysis of the signals shows that 8 detectors of 2 units always operate normally in a period of time close to a service life, the sensitivity is not reduced, and the stability is greatly improved.
Drawings
FIG. 1 is a schematic view of a fixture for mounting a core vibration detector and upper assembly metal posts and core vibration detector of the present invention;
FIG. 2 is an exploded view of a fixture for mounting a core vibration detector in accordance with the present invention;
FIG. 3 is a schematic view of the connection of the right angle connector and the support plate of the fixture for mounting the core vibration detector in accordance with the present invention;
FIG. 4 is a schematic view of the structure of the U-shaped connector of the fixing device for mounting the vibration detector of the reactor core according to the present invention;
FIG. 5 is a schematic view of a right angle connector structure of a fixture for mounting a vibration detector of a core in accordance with the present invention;
FIG. 6 is a schematic view of a spacing mechanism of a fixture for mounting a vibration detector of a core in accordance with the present invention.
Wherein: 1-right angle connector; 2-core vibration detector; 3-a detector ring base; 4-clamping blocks; 5-fixing bolts; 6-opening; 7-adjusting bolts; 8-a screw rod; 9-a screw cap; 10-notch; 11-limit bolts; 12-rectangular blocks; 13-a limit rod; 14-positioning plates; 15-rectangular bar; 16-a limit frame; 17-rectangular sleeve; 18-arc plates; 19-a pull rod; 20-rubber strips; 21-a support plate; 22-cross bar; 23-a first clamping part; 24-a second clamping part; 25-connecting pieces; 26-a rubber ring; 27-a base round opening; 28-connecting plates; 29-sliding sleeve; 30-arc rubber blocks; 31-an arc push plate; 32. cylindrical groove, 33-upper component metal upright, 34-U-shaped connecting piece, 35-limiting mechanism, 36-right angle connecting piece vertical plane and 37-right angle connecting piece horizontal plane
Detailed Description
A fixing device for mounting a core vibration detector according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, a fixing device for installing a core vibration detector includes: a core vibration detector 2; the detector comprises a detector annular base 3, an upper component metal upright post 33, a right-angle connecting piece 1, a U-shaped connecting piece 34 and a fixing bolt 5;
as shown in fig. 5, the right angle connector 1 includes: the right-angle connecting piece vertical surface 36, the right-angle connecting piece horizontal surface 37, a plurality of clamping blocks 4, a base round opening 27, a plurality of connecting pieces 25 and a rubber ring 26; a base round opening 27 is formed in the horizontal plane 37 of the right-angle connecting piece, a plurality of clamping blocks 4 are uniformly distributed on the edge of the base round opening 27, a plurality of connecting pieces 25 are uniformly distributed on the inner wall of the base round opening 27, and a rubber ring 26 is placed on the upper surface of each connecting piece 25; the reactor core vibration detector 2 is fixedly arranged on the upper surface of the detector annular base 3, a plurality of screw holes are uniformly distributed on the upper surface of the detector annular base 3, and the detector annular base 3 is in threaded connection with the right-angle connecting piece horizontal plane 37 through a fixing bolt 5;
as shown in fig. 4, the U-shaped connector 34 is connected to the right-angle connector vertical surface 36 of the right-angle connector 1, and is looped around the outer surface of the upper assembly metal post 33.
The U-shaped connector 34 includes: arc plate 18, pull rod 19, screw rod 8, cross rod 22, sliding sleeve 29, connecting plate 28 and limit mechanism 35; the two ends of the arc-shaped plate 18 are respectively connected with a pull rod 19 and a cross rod 22; a screw rod 8 is arranged at one end part of the pull rod 19, which is not connected with the arc plate 18; a cross rod connecting rod is arranged at one end part of the cross rod 22, which is not connected with the arc-shaped plate 18, a sliding sleeve 29 is sleeved on the cross rod connecting rod, and a connecting plate 28 is fixedly connected to the sliding sleeve 29; a limiting mechanism 35 is arranged on the pull rod 19; the screw rod 8 is also provided with a screw cap 9.
The arc plate 18 is also uniformly provided with a plurality of rubber strips 20, and when the U-shaped connecting piece 34 is sleeved on the outer surface of the upper assembly metal upright post 33, the rubber strips 20 are tightly attached to the outer surface of the upper assembly metal upright post 33.
As shown in fig. 6, the limiting mechanism 35 includes: the device comprises a limit bolt 11, a rectangular block 12, two limit rods 13, a positioning plate 14, a rectangular rod 15, a limit frame 16 and a rectangular sleeve 17; a rectangular sleeve 17 is arranged on the limiting frame 16, two ends of the limiting frame 16 are fixedly arranged on the pull rod 19, a positioning plate 14 is fixedly connected to the rectangular sleeve 17, and a first clamping part 23 is further arranged on the outer surface of the positioning plate 14; the same ends of the two limiting rods 13 are fixedly connected through a rectangular block 12, and the rectangular block 12 is provided with a limiting bolt 11; one ends of the two limiting rods 13, which are not used for fixing the rectangular blocks 12, penetrate through the perpendicular faces 36 of the right-angle connecting pieces, and one ends of the two limiting rods 13, which are provided with the rectangular blocks 12, are fixed on the perpendicular faces 36 of the right-angle connecting pieces through limiting bolts 11.
The second clamping portions 24 are arranged on each limiting rod 13, and the second clamping portions 24 on each limiting rod 13 are clamped with the first clamping portions 23 on the positioning plate 14.
A plurality of notches 10 are symmetrically formed on one side edge of the vertical surface 36 of the right-angle connecting piece; the screw rod 8 passes through the notch 10 and is fixedly connected with the vertical surface 36 of the right-angle connecting piece through the nut 9, and the inner diameter of the notch 10 is matched with the outer diameter of the screw rod 8.
As shown in fig. 3, the same side surface of the right-angle connector vertical surface 36 on which the U-shaped connector 34 is mounted is also provided with a support plate 21; the support plate 21 includes: a plurality of arc-shaped rubber blocks 30, a plurality of arc-shaped push plates 31 and an adjusting bolt 7; the supporting plate 21 is fixedly arranged on the surface of the vertical surface 36 of the right-angle connecting piece through the adjusting bolt 7; a through groove is further formed in the surface of the supporting plate 21, and a plurality of arc-shaped rubber blocks 30 are fixedly connected in the through groove; each arc-shaped rubber block 30 is also fixedly connected with an arc-shaped push plate 31 through an adjusting bolt 7.
A plurality of cylindrical grooves 32 are uniformly formed in each arc-shaped rubber block 30.
The arcuate push plate 31 is abutted against the outer surface of the upper assembly metal stud 33.
An axle pin is further arranged at one end part of the adjusting bolt 7 fixedly connected with the supporting plate 21, and the adjusting bolt 7 is slidably connected with the arc-shaped push plate 31 through the axle pin; one end of the shaft pin is fixedly connected with a limiting piece.
A plurality of openings are also uniformly distributed on the side wall of the annular base 3 of the detector, and each clamping block 4 on the round opening 27 of the base is correspondingly clamped with the opening on the corresponding position of the side wall of the annular base 3 of the detector.
The fixing bolt 5 penetrates into a threaded hole in the upper surface of the annular base 3 of the detector, and penetrates through the rubber ring 26 and the connecting sheet 25 from top to bottom in sequence to connect the annular base 3 of the detector with the horizontal plane 37 of the right-angle connecting piece in a threaded manner.
The rubber ring 26 can avoid forming rigid connection between the connecting sheet 25 and the annular base, so that the fixing bolt 5 is not easy to loose, and the loosening phenomenon is avoided.
The fixing method of the fixing device for installing the reactor core vibration detector as described above comprises the following steps:
step one: sleeving the U-shaped connecting piece 34 on the surface of the metal upright post of the upper component in a ring manner;
the arc 18 on the U-shaped connecting piece 34 is pressed firstly, the arc 18 drives the cross rod 22 to enable the sliding sleeve 29 to rotate on the rod wall of the cross rod connecting rod after being stressed, then the arc 18 moves circularly around the center line of the cross rod connecting rod, the arc 18 drives the pull rod 19 to enable the screw rod 8 on the pull rod to move into the notch 10, then the rectangular block 12 is pressed to enable the limiting rod 13 to slide towards the positioning plate 14, and when the limiting rod 13 slides, the second clamping part 24 on the limiting rod 13 is in sliding clamping connection with the first clamping part 23 on the positioning plate 14, so that the U-shaped connecting piece 34 is quickly abutted with the right-angle connecting piece 1, the annular sleeve of the U-shaped connecting piece 34 on the surface of the metal upright of the upper assembly is completed, and subsequent installation and fixation of workers are facilitated.
Step two: fastening a reactor core vibration detector fixing device;
the U-shaped connecting piece 34 is fixedly connected with the right-angle connecting piece vertical surface 36 of the right-angle connecting piece 1 by screwing the nut 9 on the screw rod 8, the clamping position between the limiting rod 13 and the positioning plate 14 can be driven by adjusting the limiting bolt 11, the arc-shaped plate 18 and the rubber strip 20 on the U-shaped connecting piece 34 are further driven to be tightly pressed on the surface of the upper component metal upright, when the arc-shaped plate presses the surface of the upper component metal upright, the supporting plate 21 on the right-angle connecting piece 1 presses the arc-shaped rubber block 30 to deform, air is discharged in the cylindrical groove 32 on the arc-shaped rubber block 30 and negative pressure suction is generated between the air and the surface of the upper component metal upright, and the reactor core vibration detector fixing device is fastened, so that the fixing device is not easy to loose, and the phenomenon of loose sliding between the fixing device and the metal upright is avoided.
Step three: installing a reactor core vibration detector 2; when the detector is installed, the notch on the annular base 3 of the detector is aligned with the clamping block 4, the annular base 3 of the detector is placed in the base round opening 27 after alignment, then the reactor core vibration detector is rotated anticlockwise to enable the notch on the annular base 3 of the detector to be clamped with the clamping block 4, then the fixing bolt 5 is used for penetrating through the through hole on the annular base 3 of the detector and screwing the fixing bolt 5, the annular base 3 of the detector is connected with the right-angle connecting piece horizontal plane 37 through threads, and the installation of the detector 2 is completed.
If in actual installation, when the diameter of upper portion subassembly metal stand is less, use the spanner to twist rotatory adjusting bolt 7, can promote arc push pedal 31 extrusion upper portion subassembly metal stand, and then can make fixing device can be applicable to the mounted position of upper portion subassembly metal stand surface different diameter sizes to when adjusting bolt 7 is rotatory, can realize rotating through the pivot between adjusting bolt 7 and the arc push pedal 31 and be connected, take place the clamping stagnation phenomenon between arc push pedal 31 and the upper portion subassembly metal stand when avoiding adjusting bolt 7 to rotate.
After the fixing device designed by the invention is put into use, signals of the absolute displacement detectors are regularly called by the upper computer during normal operation of the unit, and analysis of the signals shows that 8 detectors of 2 units always operate normally within a period of service life, the sensitivity is not reduced, and the stability is greatly improved.
The device of the invention connects the upper assembly metal upright post with the right-angle connecting piece of the fixing device through the U-shaped connecting piece under the condition that the shape of the fixed detector is not changed and the surface of the upper assembly metal upright post is not damaged, and the problem of installation of the detector after displacement is effectively solved by adopting a mode of fixing the detector on the right-angle connecting piece of the fixing device. This scheme has fine reference meaning to the detector that detects vibration need fix the problem on circular object, and the follow-up shape through changing right angle connecting piece horizontal plane, the position of bolt hole and the size of U type connecting piece, the device is applicable in the detector that detects vibration of difference needs the condition of installing on cylindrical object.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (5)
1. A fixture for mounting a core vibration detector, comprising: a core vibration detector (2); the detector comprises a detector annular base (3), an upper component metal upright post (33), a right-angle connecting piece (1), a U-shaped connecting piece (34) and a fixing bolt (5);
the right angle connector (1) comprises: the device comprises a right-angle connecting piece vertical surface (36), a right-angle connecting piece horizontal surface (37), a plurality of clamping blocks (4), a base round opening (27), a plurality of connecting pieces (25) and a rubber ring (26); a base round opening (27) is formed in the horizontal plane (37) of the right-angle connecting piece, a plurality of clamping blocks (4) are uniformly distributed on the edge of the base round opening (27), a plurality of connecting pieces (25) are uniformly distributed on the inner wall of the base round opening (27), and a rubber ring (26) is placed on the upper surface of the connecting pieces (25); the reactor core vibration detector (2) is fixedly arranged on the upper surface of the annular detector base (3), a plurality of screw holes are uniformly distributed on the upper surface of the annular detector base (3), and the annular detector base (3) is in threaded connection with a right-angle connecting piece horizontal plane (37) through a fixing bolt (5);
the U-shaped connecting piece (34) is connected with a right-angle connecting piece vertical surface (36) of the right-angle connecting piece (1), and is sleeved and fixed on the outer surface of the upper component metal upright post (33);
the U-shaped connector (34) includes: the device comprises an arc-shaped plate (18), a pull rod (19), a screw rod (8), a cross rod (22), a sliding sleeve (29), a connecting plate (28) and a limiting mechanism (35); two ends of the arc-shaped plate (18) are respectively connected with a pull rod (19) and a cross rod (22); a screw rod (8) is arranged at one end part of the pull rod (19) which is not connected with the arc-shaped plate (18); a cross rod connecting rod is arranged at one end part of the cross rod (22) which is not connected with the arc-shaped plate (18), a sliding sleeve (29) is sleeved on the cross rod connecting rod, and a connecting plate (28) is fixedly connected to the sliding sleeve (29); a limiting mechanism (35) is arranged on the pull rod (19); a screw cap (9) is also arranged on the screw rod (8);
a plurality of rubber strips (20) are uniformly distributed on the arc-shaped plate (18), and when the U-shaped connecting piece (34) is sleeved on the outer surface of the upper component metal upright post (33), the rubber strips (20) are tightly attached to the outer surface of the upper component metal upright post (33);
the limit mechanism (35) includes: the device comprises limit bolts (11), rectangular blocks (12), two limit rods (13), a positioning plate (14), rectangular rods (15), limit frames (16) and rectangular sleeves (17); a rectangular sleeve (17) is arranged on the limiting frame (16), two ends of the limiting frame (16) are fixedly arranged on the pull rod (19), a positioning plate (14) is fixedly connected to the rectangular sleeve (17), and a first clamping part (23) is further arranged on the outer surface of the positioning plate (14); the same ends of the two limiting rods (13) are fixedly connected through a rectangular block (12), and the rectangular block (12) is provided with a limiting bolt (11); one end of each of the two limiting rods (13), which is not fixed with the rectangular block (12), penetrates out of the perpendicular surface (36) of the right-angle connecting piece, and one end of each of the two limiting rods (13), which is provided with the rectangular block (12), is fixed on the perpendicular surface (36) of the right-angle connecting piece through a limiting bolt (11);
a second clamping part (24) is arranged on each limiting rod (13), and the second clamping part (24) on each limiting rod (13) is clamped with the first clamping part (23) on the positioning plate (14); a plurality of notches (10) are symmetrically arranged on one side edge of the vertical surface (36) of the right-angle connecting piece; the screw rod (8) passes through the notch (10) and is fixedly connected with the vertical surface (36) of the right-angle connecting piece through the nut (9), and the inner diameter of the notch (10) is matched with the outer diameter of the screw rod (8);
the same side surface of the right-angle connecting piece vertical surface (36) is provided with a U-shaped connecting piece (34), and a supporting plate (21) is also arranged on the same side surface; the support plate (21) comprises: a plurality of arc rubber blocks (30), a plurality of arc push plates (31) and an adjusting bolt (7); the supporting plate (21) is fixedly arranged on the surface of a vertical surface (36) of the right-angle connecting piece through an adjusting bolt (7); a through groove is further formed in the surface of the supporting plate (21), and a plurality of arc-shaped rubber blocks (30) are fixedly connected in the through groove; each arc-shaped rubber block (30) is fixedly connected with an arc-shaped push plate (31) through an adjusting bolt (7);
a plurality of cylindrical grooves (32) are uniformly formed in each arc-shaped rubber block (30); the arc pushing plate (31) is tightly attached to the outer surface of the upper component metal upright post (33);
an axle pin is further arranged at one end part of the adjusting bolt (7) fixedly connected with the supporting plate (21), and the adjusting bolt (7) is in sliding connection with the arc-shaped push plate (31) through the axle pin; one end of the shaft pin is fixedly connected with a limiting piece;
a plurality of openings are uniformly distributed on the side wall of the annular base (3) of the detector, and each clamping block (4) on the circular opening (27) of the base is correspondingly clamped with the opening on the corresponding position of the side wall of the annular base (3) of the detector;
the fixing bolts (5) penetrate into threaded holes in the upper surface of the annular base (3) of the detector, and sequentially penetrate through the rubber ring (26) and the connecting sheet (25) from top to bottom to connect the annular base (3) of the detector with the horizontal plane (37) of the right-angle connecting piece in a threaded mode.
2. A method of securing the securing device for mounting a core vibration detector as defined in claim 1, comprising the steps of:
step one: sleeving a U-shaped connecting piece (34) on the surface of a metal upright post of the upper assembly in a ring manner;
step two: fastening a reactor core vibration detector fixing device;
step three: a core vibration detector (2) is installed.
3. The method of securing the securing device for mounting the core vibration detector as recited in claim 2, wherein:
the first step further comprises: the arc-shaped plate (18) on the U-shaped connecting piece (34) is pressed firstly, the arc-shaped plate (18) drives the cross rod (22) to enable the sliding sleeve (29) to rotate on the rod wall of the cross rod connecting rod after being stressed, then the arc-shaped plate (18) is enabled to do circular motion around the central line of the cross rod connecting rod, the pull rod (19) is driven when the arc-shaped plate (18) moves, the screw rod (8) on the pull rod is enabled to move into the notch (10), then the rectangular block (12) is pressed to enable the limiting rod (13) to slide towards the positioning plate (14), and when the limiting rod (13) slides, the second clamping part (24) on the limiting rod (13) is in sliding clamping connection with the first clamping part (23) on the positioning plate (14), and then the U-shaped connecting piece (34) is quickly abutted with the right-angle connecting piece (1), so that the annular sleeve of the U-shaped connecting piece (34) on the surface of the metal upright of the upper component is completed.
4. The method for securing the securing device for installing the core vibration detector as recited in claim 3, wherein:
the second step further comprises: the U-shaped connecting piece (34) is fixedly connected with the right-angle connecting piece vertical surface (36) of the right-angle connecting piece (1) through a screw cap (9) on the screw rod (8) in a screwing mode, the clamping position between the limiting rod (13) and the positioning plate (14) can be driven through adjusting the limiting bolt (11), then the arc-shaped plate (18) and the rubber strip (20) on the U-shaped connecting piece (34) are driven to be tightly pressed on the surface of the upper assembly metal upright, when the arc-shaped plate presses the surface of the upper assembly metal upright, the supporting plate (21) on the right-angle connecting piece (1) presses the arc-shaped rubber block (30) to deform, negative pressure suction force is generated between the air in the cylindrical groove (32) on the arc-shaped rubber block (30) and the surface of the upper assembly metal upright, and the reactor core vibration detector fixing device is fastened, so that the fixing device is not easy to loose, and the loose sliding phenomenon between the fixing device and the metal upright is avoided.
5. The method for fixing the fixing device for installing the core vibration detector as claimed in claim 4, wherein:
the third step further comprises: when installing reactor core vibration detector (2), with the opening on detector ring base (3) with fixture block (4) align, place detector ring base (3) in base round mouth (27) after the alignment, then anticlockwise rotatory reactor core vibration detector makes opening and fixture block (4) joint on detector ring base (3), then uses fixing bolt (5) to pass through-hole on detector ring base (3) and screw fixing bolt (5), with detector ring base (3) and right angle connecting piece horizontal plane (37) threaded connection, accomplish installation reactor core vibration detector (2).
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| CN202111036496.4A CN113829252B (en) | 2021-09-06 | 2021-09-06 | Fixing device and fixing method for installing reactor core vibration detector |
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| US4590671A (en) * | 1984-05-29 | 1986-05-27 | Westinghouse Electric Corp. | Tool for removing split pin remnants from a nuclear reactor vessel |
| CN203799676U (en) * | 2014-03-12 | 2014-08-27 | 江苏核电有限公司 | Fixing device for absolute displacement detector |
| CN211502263U (en) * | 2020-01-17 | 2020-09-15 | 北京联视神盾安防技术有限公司 | A installation device for intelligent camera of security protection |
| CN112253630A (en) * | 2020-11-09 | 2021-01-22 | 江苏宏远工业窑炉制造有限公司 | Wear-resisting shaft bushing mounting structure of cam |
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