CN113829252A - Fixing device for installing reactor core vibration detector and fixing method thereof - Google Patents
Fixing device for installing reactor core vibration detector and fixing method thereof Download PDFInfo
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- CN113829252A CN113829252A CN202111036496.4A CN202111036496A CN113829252A CN 113829252 A CN113829252 A CN 113829252A CN 202111036496 A CN202111036496 A CN 202111036496A CN 113829252 A CN113829252 A CN 113829252A
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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 fixation of reactor core vibration detectors, and particularly relates to a fixing device for installing a reactor core vibration detector and a fixing method thereof, wherein the fixing device comprises the following steps: a reactor core vibration detector; the detector comprises an annular base, an upper component metal upright, a right-angle connecting piece, a U-shaped connecting piece and a fixing bolt; the device of the invention connects the upper component metal upright post with the right-angle connecting piece of the fixing device through the U-shaped connecting piece under the conditions of not changing the shape of the fixed detector and not damaging the surface of the upper component metal upright post, and effectively solves the installation problem of the detector after displacement 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 fixation of reactor core vibration detectors, and particularly relates to a fixing device for mounting a reactor core vibration detector and a fixing method thereof.
Background
Absolute displacement detectors, hereinafter core vibration detectors) provide a vertical low frequency vibration signal of the reactor pressure vessel during operation of the reactor at different power levels. The sensor is fixed by a nut matched with the bolt on the end faces of 4 bolts arranged on the main joint face of the reactor pressure vessel, and low-frequency vibration signals are converted into electric signals by the inductance principle. The reactor core vibration detector is installed in a heat shield layer of a reactor pressure vessel, the working environment temperature of the detector is close to 300 ℃ during the operation of the unit, and the radiation dose of the region is high. The detector can frequently fail when the detector works in a severe environment for a long time. According to statistics, during ten fuel cycles before the operation of a unit No. 1/2 in a certain nuclear power station, the two units have 8 detectors in total, and the phenomena of unstable power supply and low insulation occur at different times, so that the fault rate of the detectors is high. Meanwhile, during overhaul, the reactor core vibration detector is disassembled and assembled to work, and due to the fact that the radiation dose of the working environment is high, the radiation dose received by workers is high. Under the long-period refueling state of a subsequent unit, the reliable operation of the current reactor core vibration detector cannot be guaranteed for 18 months under the operation condition, and the requirement on the operation reliability of the detector in a technical manual cannot be met.
Therefore, in order to ensure the reliable operation of the detector and reduce the temperature and radiation dose of the working environment of the reactor core vibration detector, the fixing device and the fixing method for installing the reactor core vibration detector are designed on the basis of not influencing the inherent diagnostic performance of the detector so as to solve the technical problems.
Disclosure of Invention
The invention provides a fixing device and a fixing method for installing a reactor core vibration detector, aiming at the prior art, and aiming at solving the technical problem that the detector is prone to frequent faults caused by high radiation dose intensity of working environment temperature during the operation of a unit when the reactor core vibration detector is fixed on a heat shield of a reactor pressure vessel in the prior art.
The technical scheme of the invention is as follows:
a fixture for mounting a core vibration detector, comprising: a reactor core vibration detector; the detector comprises an annular base, an upper component metal upright, a right-angle connecting piece, a U-shaped connecting piece and a fixing bolt;
the right angle connector includes: the vertical surface of the right-angle connecting piece, the horizontal surface of the right-angle connecting piece, a plurality of clamping blocks, a round opening of the base, a plurality of connecting pieces and a rubber ring; 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 is sleeved and fixed on the outer surface of the metal upright post of the upper assembly.
The U type connecting piece includes: 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; 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 bar connecting rod is arranged on one end part of the cross bar, which is not connected with the arc-shaped plate, a sliding sleeve is sleeved on the cross bar connecting rod, and a connecting plate is fixedly connected on the sliding sleeve; the pull rod is provided with a limiting mechanism; the screw rod is also provided with a nut.
The arc-shaped plate is also uniformly provided with a plurality of rubber strips, and when the U-shaped connecting piece is sleeved on the outer surface of the metal stand column of the upper component, the rubber strips are tightly attached to the outer surface of the metal stand column of the upper component.
The stop gear includes: the limiting device comprises a limiting bolt, a rectangular block, two limiting rods, a positioning plate, a rectangular rod, a limiting 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 a rectangular block, and a limiting bolt is arranged on the rectangular block; the one end that two gag lever posts do not fix the rectangular block all wears out from the right angle connecting piece perpendicular, and the one end that is provided with the rectangular block on two gag lever posts passes through spacing bolt fastening on the right angle connecting piece perpendicular.
Every gag lever post all is provided with second joint portion, and the second joint portion on every gag lever post all with the first joint portion joint on the locating plate.
A plurality of notches are symmetrically formed in one side edge of the vertical surface of the right-angle connecting piece; the screw rod penetrates through the notch and is fixedly connected with the vertical surface of the right-angle connecting piece through the screw cap, 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-shaped rubber blocks, a plurality of arc-shaped push plates and adjusting bolts; 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 a plurality of cylindrical grooves are uniformly formed in each arc-shaped rubber block.
The arc push plate is tightly attached to the outer surface of the metal upright post of the upper component.
A shaft pin is further arranged at one end of the adjusting bolt fixedly connected with the 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.
And a plurality of openings are uniformly distributed on the side wall of the annular base of the detector, and each clamping block on the round opening of the base corresponds to the opening in the corresponding position on the side wall of the annular base of the detector in a clamping connection mode.
The fixing bolt penetrates through a threaded hole in the upper surface of the annular detector base and sequentially penetrates through the rubber ring and the connecting piece from top to bottom to connect the annular detector base with the horizontal plane of the right-angle connecting piece in a threaded mode.
A fixing method for a fixing device for installing a core vibration detector, comprising the steps of:
the method comprises the following steps: sleeving a U-shaped connecting piece on the surface of the metal upright post of the upper component in a ring manner;
step two: fastening a reactor core vibration detector fixing device;
step three: and installing a reactor core vibration detector.
The first step further comprises: press the arc on the U type connecting piece 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 during the arc motion, make lead screw on the pull rod move to in the breach, then press the rectangular block and make the gag lever post slide to the locating plate direction, when the gag lever post slides, second joint portion on the gag lever post and the slip joint of first joint portion on the locating plate, and then will dock U type connecting piece and right angle connecting piece fast, it is fixed to accomplish U type connecting piece and carry out the ring cover on the upper portion subassembly metal column surface.
The second step further comprises: through the nut on the lead screw of screwing with U type connecting piece and right angle connecting piece's right angle connecting piece perpendicular fixed connection, and can drive the joint position between gag lever post and the locating plate through adjusting spacing bolt, and then drive arc and the rubber strip on the U type connecting piece and compress tightly on upper portion subassembly metal column surface, when the arc extrudees upper portion subassembly metal column surface, deformation takes place for backup pad extrusion arc rubber piece on the right angle connecting piece, and make the cylinder inslot exhaust air on the arc rubber piece and with upper portion subassembly metal column surface between produce negative pressure suction, fastening reactor core vibration detector fixing device, make the difficult pine of fixing device pine take off, avoid appearing the pine between fixing device and the metal column and take off sliding phenomenon.
The third step further comprises: when the detector is installed, the opening on the annular base of the detector is aligned with the fixture block, the annular base of the detector is placed in the round hole of the base after alignment, then the reactor core vibration detector is rotated anticlockwise to enable the opening on the annular base of the detector to be connected with the fixture block in a clamped mode, then the fixing bolt penetrates through the through hole in the annular base of the detector and is screwed, the annular base of the detector is in threaded connection with the horizontal plane of the right-angle connecting piece, and the detector is installed.
The invention has the beneficial effects that:
1 the fixing device designed by the invention can effectively transfer the vibration of the reactor core to the detector without influencing the sensitivity of the detector by stably installing the reactor core vibration detector on the upper component metal upright post.
2 the fixing device is used for fixedly mounting the reactor 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 reactor core vibration detector is not changed and the upper assembly metal upright post is not damaged.
3 the limiting mechanism arranged on the U-shaped connecting piece can quickly clamp, limit and fix the fixing device on the outer surface of the metal upright post of the upper assembly, and is convenient for workers to carry out subsequent installation and fixation.
4 the supporting plate arranged on the right-angle connecting piece in the device is provided with the rubber block, the rubber block is also provided with a plurality of cylindrical grooves, 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 assembly metal upright, and the friction force between the U-shaped connecting piece and the outer surface of the upper assembly metal upright can be increased by the rubber strip arranged on the U-shaped connecting piece, so that the fixing device designed by the invention is not easy to loosen, and the loosening and sliding phenomena between the fixing device and the metal upright are avoided.
5 the invention solves the problem that the detector can not be installed after being displaced from the heat shield 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 fixed installation problems of other detection vibration detectors needing to be fixed on a circular 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 changes, the adjusting bolt and the arc-shaped push plate in the device can be used for adapting to the size of 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 assembly metal stand column when the adjusting bolt rotates is avoided.
8 be equipped with the rubber circle between detector annular base and the connection piece, the rubber circle can avoid forming rigid connection between connection piece and the annular base, and then makes the difficult pine of fixing bolt of fixed detector annular base take off, can avoid appearing detector annular base and right angle connection spare and be connected not hard up phenomenon.
After the fixing device designed by the invention is put into use, signals of the absolute displacement detectors are periodically taken from the upper computer during the normal operation of the unit, and the analysis of the signals shows that 8 detectors of 2 units are always operated normally in the time of nearly one service life, the sensitivity is not reduced, and the stability is greatly improved.
Drawings
FIG. 1 is a schematic view of the installation of the fixing device for installing the core vibration detector and the upper assembly metal column and the core vibration detector designed by the invention;
FIG. 2 is an exploded view of a mounting apparatus for mounting a core vibration detector according to the present invention;
FIG. 3 is a schematic view showing the connection between the right-angle connector and the support plate of the fixing device for installing the core vibration detector according to the present invention;
FIG. 4 is a schematic structural diagram of a U-shaped connecting piece of a fixing device for installing a core vibration detector, which is designed by the invention;
FIG. 5 is a schematic view of a right-angle connector structure of a fixing device for installing a core vibration detector according to the present invention;
fig. 6 is a schematic structural diagram of a limiting mechanism of the fixing device for installing the core vibration detector according to the present invention.
Wherein: 1-right angle connectors; 2-a reactor core vibration detector; 3-detector ring base; 4-clamping blocks; 5-fixing the bolt; 6-opening; 7-adjusting the bolt; 8-a screw rod; 9-a screw cap; 10-notch; 11-a limit bolt; 12-a rectangular block; 13-a limiting rod; 14-positioning plate; 15-a rectangular bar; 16-a limit frame; 17-a rectangular sleeve; 18-an arc plate; 19-a pull rod; 20-rubber strips; 21-a support plate; 22-a cross-bar; 23-a first snap-in part; 24-a second snap-in portion; 25-connecting pieces; 26-a rubber ring; 27-base round mouth; 28-a connecting plate; 29-a sliding sleeve; 30-arc rubber blocks; 31-an arc-shaped push plate; 32. cylindrical groove, 33-upper component metal upright, 34-U-shaped connecting piece, 35-limiting mechanism, 36-right-angle connecting piece vertical surface and 37-right-angle connecting piece horizontal surface
Detailed Description
The following describes a fixing device for installing a core vibration detector according to the present invention in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, a fixing apparatus for installing a core vibration detector includes: a reactor core vibration detector 2; the detector comprises a detector annular base 3, an upper component metal upright 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 vertical surface 36 of the right-angle connecting piece, the horizontal surface 37 of the right-angle connecting piece, a plurality of clamping blocks 4, a round opening 27 of the base, 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 rubber rings 26 are 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 a right-angle connecting piece horizontal plane 37 through a fixing bolt 5;
as shown in fig. 4, the U-shaped connecting member 34 is connected to the vertical surface 36 of the right-angle connecting member 1 and is fitted around the outer surface of the metal upright 33 of the upper assembly.
The U-shaped connector 34 includes: the arc-shaped plate 18, the pull rod 19, the screw rod 8, the cross rod 22, the sliding sleeve 29, the connecting plate 28 and the limiting mechanism 35; two ends of the arc 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 bar connecting rod is arranged at one end part of the cross bar 22, which is not connected with the arc-shaped plate 18, a sliding sleeve 29 is sleeved on the cross bar connecting rod, and a connecting plate 28 is also fixedly connected on the sliding sleeve 29; the pull rod 19 is provided with a limiting mechanism 35; the screw rod 8 is also provided with a screw cap 9.
The arc plate 18 is also evenly provided with a plurality of rubber strips 20, and when the U-shaped connecting piece 34 is sleeved on the outer surface of the metal upright 33 of the upper assembly, the rubber strips 20 are tightly attached to the outer surface of the metal upright 33 of the upper assembly.
As shown in fig. 6, the limiting mechanism 35 includes: the device comprises a limiting bolt 11, a rectangular block 12, two limiting rods 13, a positioning plate 14, a rectangular rod 15, a limiting 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 portion 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 a limiting bolt 11 is arranged on the rectangular block 12; the ends of the two limiting rods 13, which are not fixed with the rectangular blocks 12, penetrate out of the vertical surface 36 of the right-angle connecting piece, and the ends, which are provided with the rectangular blocks 12, of the two limiting rods 13 are fixed on the vertical surface 36 of the right-angle connecting piece through the limiting bolts 11.
Every gag lever post 13 is last all to be provided with second joint portion 24, and second joint portion 24 on every gag lever post 13 all with the first joint portion 23 joint on the locating plate 14.
A plurality of notches 10 are symmetrically formed in one side edge of the vertical surface 36 of the right-angle connecting piece; the screw rod 8 penetrates through the notch 10 and is fixedly connected with the vertical surface 36 of the right-angle connecting piece through the screw cap 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 supporting plate 21 is also arranged on the same side surface of the vertical surface 36 of the right-angle connecting piece, on which the U-shaped connecting piece 34 is arranged; the support plate 21 includes: a plurality of arc-shaped rubber blocks 30, a plurality of arc-shaped push plates 31 and adjusting bolts 7; the support plate 21 is fixedly arranged on the surface of the 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 also fixedly connected with an arc-shaped push plate 31 through an adjusting bolt 7.
Each arc-shaped rubber block 30 is evenly provided with a plurality of cylindrical grooves 32.
The arc push plate 31 is tightly attached to the outer surface of the metal upright 33 of the upper assembly.
A shaft pin is further arranged at one end of the adjusting bolt 7 fixedly connected with the support plate 21, and the adjusting bolt 7 is in sliding connection with the arc-shaped push plate 31 through the shaft 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 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 through a threaded hole on the upper surface of the annular detector base 3 and sequentially penetrates through the rubber ring 26 and the connecting piece 25 from top to bottom to connect the annular detector base 3 with the horizontal plane 37 of the right-angle connecting piece in a threaded mode.
The rubber ring 26 can prevent the connecting piece 25 and the annular base from being rigidly connected, so that the fixing bolt 5 is not easy to loosen and the loosening phenomenon is avoided.
The fixing method of the fixing device for installing the core vibration detector comprises the following steps:
the method comprises the following steps: sleeving a U-shaped connecting piece 34 on the surface of the metal upright post of the upper component;
firstly press arc 18 on U type connecting piece 34, arc 18 drives horizontal pole 22 after the atress and makes sliding sleeve 29 rotate on the pole wall of horizontal pole connecting rod, and then make arc 18 be circular motion around the central line of horizontal pole connecting rod, drive pull rod 19 during the arc 18 motion, make lead screw 8 on the pull rod move to in the breach 10, then press rectangular block 12 and make gag lever post 13 slide to locating plate 14 direction, when gag lever post 13 slides, second joint portion 24 on the gag lever post 13 and the slip joint of first joint portion 23 on the locating plate 14, and then will dock U type connecting piece 34 and right angle connecting piece 1 fast, it is fixed to accomplish U type connecting piece 34 and carrying out the ring cover on the upper portion subassembly metal column surface, make things convenient for the workman to carry out subsequent installation fixedly.
Step two: fastening a reactor core vibration detector fixing device;
through the nut 9 of screwing on the lead screw 8 with U type connecting piece 34 and the right angle connecting piece perpendicular 36 fixed connection of right angle connecting piece 1, and can drive the joint position between gag lever post 13 and locating plate 14 through adjusting spacing bolt 11, and then drive arc 18 and rubber strip 20 on the U type connecting piece 34 and compress tightly on upper assembly metal column surface, when the arc extrudees upper assembly metal column surface, backup pad 21 extrusion arc rubber block 30 on the right angle connecting piece 1 takes place deformation, and make the cylinder groove 32 on the arc rubber block 30 in the exhaust air and with upper assembly metal column surface between produce the negative pressure suction, fastening reactor core vibration detector fixing device, make fixing device difficult pine take off, avoid appearing the pine between fixing device and the metal column and take off the slip phenomenon.
Step three: installing a reactor core vibration detector 2; when the detector is installed, the opening in the annular base 3 of the detector is aligned with the fixture block 4, the annular base 3 of the detector is placed in the round opening 27 of the base after alignment, then the reactor core vibration detector is rotated anticlockwise to enable the opening in the annular base 3 of the detector to be connected with the fixture block 4 in a clamping mode, then the fixing bolt 5 is used for penetrating through the through hole in the annular base 3 of the detector and screwing the fixing bolt 5, the annular base 3 of the detector is in threaded connection with the horizontal plane 37 of the right-angle connecting piece, and the detector 2 is installed.
If in the actual installation, when the diameter of upper part subassembly metal stand is less, use the spanner to twist and move rotatory adjusting bolt 7, can promote arc push pedal 31 extrusion upper part subassembly metal stand, and then can make fixing device can be applicable to the mounted position of the different diameter sizes in upper part subassembly metal stand surface, and when adjusting bolt 7 was rotatory, can realize rotating through the pivot between adjusting bolt 7 and the arc push pedal 31 and be connected, take place the jamming phenomenon between arc push pedal 31 and the upper part 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 periodically taken from the upper computer during the normal operation of the unit, and the analysis of the signals shows that 8 detectors of 2 units are always operated normally in the time of nearly one service life, the sensitivity is not reduced, and the stability is greatly improved.
The device of the invention connects the upper component metal upright post with the right-angle connecting piece of the fixing device through the U-shaped connecting piece under the conditions of not changing the shape of the fixed detector and not damaging the surface of the upper component metal upright post, and effectively solves the installation problem of the detector after displacement by adopting a mode of fixing the detector on the right-angle connecting piece of the fixing device. This scheme need fix the problem on circular object to the detector that detects the vibration has fine reference meaning, and follow-up shape through changing the 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 different circumstances that need install on cylindrical object of detector that detects the vibration.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (16)
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 vertical surface (36) of the right-angle connecting piece, the horizontal surface (37) of the right-angle connecting piece, a plurality of clamping blocks (4), a round opening (27) of the base, 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 a right-angle connecting piece horizontal plane (37) through a fixing bolt (5);
the U-shaped connecting piece (34) is connected with a vertical surface (36) of the right-angle connecting piece (1) and is fixed on the outer surface of the metal upright post (33) of the upper assembly in an annular sleeve mode.
2. The fixture for installing the core vibration detector as set forth in claim 1, wherein: the U-shaped connector (34) comprises: 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 bar connecting rod is arranged at one end part of the cross bar (22) which is not connected with the arc-shaped plate (18), a sliding sleeve (29) is sleeved on the cross bar connecting rod, and a connecting plate (28) is also 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).
3. The fixing device for installing the core vibration detector as set forth in claim 2, wherein: the arc-shaped plate (18) is also uniformly provided with a plurality of rubber strips (20), the U-shaped connecting piece (34) is sleeved on the outer surface of the metal upright post (33) of the upper assembly in a ring mode, and the rubber strips (20) are tightly attached to the outer surface of the metal upright post (33) of the upper assembly.
4. A fixture for installing a core vibration detector as claimed in claim 3, wherein: the limiting mechanism (35) comprises: the device comprises a limiting bolt (11), a rectangular block (12), two limiting rods (13), a positioning plate (14), a rectangular rod (15), a limiting 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 portion (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 a limiting bolt (11) is arranged on the rectangular block (12); the ends, not fixed with the rectangular blocks (12), of the two limiting rods (13) penetrate out of the vertical surface (36) of the right-angle connecting piece, and the ends, provided with the rectangular blocks (12), of the two limiting rods (13) are fixed on the vertical surface (36) of the right-angle connecting piece through limiting bolts (11).
5. The fixture for installing the core vibration detector as set forth in claim 4, wherein: every gag lever post (13) is last all to be provided with second joint portion (24), and second joint portion (24) on every gag lever post (13) all with first joint portion (23) joint on locating plate (14).
6. The fixing device for installing the core vibration detector as set forth in claim 2, wherein: 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) penetrates through the notch (10) and is fixedly connected with the vertical surface (36) of the right-angle connecting piece through the screw cap (9), and the inner diameter of the notch (10) is matched with the outer diameter of the screw rod (8).
7. The fixture for installing the core vibration detector as set forth in claim 6, wherein: a support plate (21) is also arranged on the same side surface of the vertical surface (36) of the right-angle connecting piece, which is provided with the U-shaped connecting piece (34); the support plate (21) comprises: a plurality of arc-shaped rubber blocks (30), a plurality of arc-shaped push plates (31) and adjusting bolts (7); the support 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).
8. The fixture for installing the core vibration detector as set forth in claim 7, wherein: each arc-shaped rubber block (30) is evenly provided with a plurality of cylindrical grooves (32).
9. The fixture for installing the core vibration detector as set forth in claim 8, wherein: the arc-shaped push plate (31) is tightly attached to the outer surface of the metal upright post (33) of the upper assembly.
10. The fixture for installing the core vibration detector as set forth in claim 9, wherein: a shaft pin is further arranged at one end 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 shaft pin; one end of the shaft pin is fixedly connected with a limiting piece.
11. The fixture for installing the core vibration detector as set forth in claim 1, wherein: a plurality of openings are uniformly distributed on the side wall of the annular detector base (3), and each clamping block (4) on the round base opening (27) is correspondingly clamped with the opening on the corresponding position of the side wall of the annular detector base (3).
12. The fixture for installing the core vibration detector as set forth in claim 1, wherein: the fixing bolt (5) penetrates through a threaded hole in the upper surface of the annular detector base (3) and sequentially penetrates through the rubber ring (26) and the connecting piece (25) from top to bottom to connect the annular detector base (3) with the horizontal plane (37) of the right-angle connecting piece in a threaded mode.
13. A fixing method of a fixing apparatus for installing a core vibration detector according to any one of claims 1 to 12, comprising the steps of:
the method comprises the following steps: sleeving a U-shaped connecting piece (34) on the surface of the 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 (2).
14. The fixing method of the fixing apparatus for installing the core vibration detector as set forth in claim 13, wherein:
the first step further comprises: according to the technical scheme, 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, further, the arc-shaped plate (18) makes 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 moves into the notch (10), then the rectangular block (12) is pressed to enable the limiting rod (13) to slide towards the direction of the positioning plate (14), when the limiting rod (13) slides, the second clamping portion (24) on the limiting rod (13) is in sliding clamping connection with the first clamping portion (23) on the positioning plate (14), further, the U-shaped connecting piece (34) is in rapid butt joint with the right-angle connecting piece (1), and the U-shaped connecting piece (34) is fixed in a ring sleeve on the surface of the upper assembly metal stand column.
15. The fixing method of the fixing apparatus for installing the core vibration detector as set forth in claim 13, wherein:
the second step further comprises: the U-shaped connecting piece (34) is fixedly connected with the vertical surface (36) of the right-angle connecting piece (1) by screwing the screw cap (9) on the screw rod (8), and the clamping position between the limiting rod (13) and the positioning plate (14) can be driven by adjusting the limiting bolt (11), thereby driving the arc-shaped plate (18) and the rubber strip (20) on the U-shaped connecting piece (34) to be tightly pressed on the surface of the metal upright post of the upper assembly, when the arc-shaped plate extrudes the surface of the metal upright post of the upper component, the support plate (21) on the right-angle connecting piece (1) extrudes the arc-shaped rubber block (30) to deform, and the air is discharged from the cylindrical groove (32) on the arc-shaped rubber block (30) and generates negative pressure suction force with the surface of the upper component metal upright column to fasten the reactor core vibration detector fixing device, the fixing device is not easy to loosen, and the phenomenon that the fixing device and the metal upright post are loosened and slide is avoided.
16. The fixing method of the fixing apparatus for installing the core vibration detector as set forth in claim 13, wherein:
the third step further comprises: when the detector is installed, the opening in the annular detector base (3) is aligned with the fixture block (4), the annular detector base (3) is placed in the base round opening (27) after alignment, then the reactor core vibration detector rotates anticlockwise to enable the opening in the annular detector base (3) to be connected with the fixture block (4) in a clamping mode, then the fixing bolt (5) is used for penetrating through holes in the annular detector base (3) and screwing the fixing bolt (5), the annular detector base (3) is in threaded connection with the horizontal right-angle connector (37), and the detector (2) is installed.
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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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| 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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| 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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2021
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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 |
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| CN113829252B (en) | 2023-09-08 |
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