CN204537708U - A kind of measurement mechanism for measuring main pump thermal walking - Google Patents
A kind of measurement mechanism for measuring main pump thermal walking Download PDFInfo
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- CN204537708U CN204537708U CN201520244835.1U CN201520244835U CN204537708U CN 204537708 U CN204537708 U CN 204537708U CN 201520244835 U CN201520244835 U CN 201520244835U CN 204537708 U CN204537708 U CN 204537708U
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- leveling board
- screw rod
- buckle
- main pump
- measurement mechanism
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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 utility model discloses a kind of measurement mechanism for measuring main pump thermal walking, comprising leveling board, be provided with vertical screw rod in described leveling board, and vertically screw rod is through leveling board, vertical screw rod can carry out vertical and move in leveling board; Described leveling board is provided with two buckle groups, each buckle group is oppositely arranged by the buckle that structure is identical to be formed, buckle in each buckle group interfixes, leveling board is arranged between buckle group, U-type groove is provided with between buckle group, U-type groove is fixed on leveling board, and U-type groove is provided with displacement transducer, and the two ends correspondence of displacement transducer is through buckle group.This measurement mechanism by the impact of site environment, does not need personnel on site to operate, ensure that the accurate and effective that main pump thermal walking data are measured for a long time; This measurement mechanism structure is simple, processing and easy for installation, saves test funds and time; This measurement mechanism is applicable to thermal walking when main pump runs and measures test.
Description
Technical field
The utility model relates to a kind of thermal walking measurement mechanism field, particularly, relate to the design and installation technology etc. of the type selecting of displacement transducer, Quick installation fixing device, and displacement secondary instrument, a kind of measurement mechanism for measuring main pump thermal walking of data acquisition system (DAS) composition.
Background technology
During reactor operation by main pump drive cooling medium take away reactor core reaction produce heat, because coolant temperature during reactor operation can be increased to 300 DEG C from room temperature (22 DEG C), main pump and connected pipe temperature high together with step-up.So high temperature variation causes main pump to produce larger thermal walking, and the size of thermal walking is the important parameter affecting mechanical vibration when main pump runs.Therefore, measure the thermal walking of main pump so as to evaluate main pump vibration, evaluate main pump and whether long-term safety can run and have important engineering significance.
Conventional thermal walking is measured and is adopted common displacement transducer to measure.For main reactor pump, it is positioned at the reactor control zone having radiation, conventional displacement measurement method requires the device of a kind of fixed displacement sensor of design, the thermal walking change of main pump can be monitored steadily in the long term after Fast Installation displacement transducer, so cannot be adopted to carry out.Therefore, design meet control zone Fast Installation after the economical and practical thermal walking measurement mechanism of long term monitoring main pump thermal walking can have larger difficulty and novelty.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of measurement mechanism for measuring main pump thermal walking, and this measurement mechanism structure is simple, and test data is accurate, avoids human body to be subject to chronic exposure, and the long-term stability achieving main pump thermal walking is measured.
The technical scheme in the invention for solving the above technical problem is: a kind of measurement mechanism for measuring main pump thermal walking, comprise leveling board, be provided with vertical screw rod in described leveling board, and vertically screw rod is through leveling board, vertical screw rod can carry out vertical and move in leveling board; Find location base accurately when mounted, the center line of vertical screw rod and the central axis of leveling board be ensured; Described leveling board is provided with two buckle groups, each buckle group is oppositely arranged by the buckle that structure is identical to be formed, buckle in each buckle group interfixes, leveling board is arranged between buckle group, is provided with U-type groove between buckle group, and U-type groove is fixed on leveling board, U-type groove is provided with displacement transducer, the two ends correspondence of displacement transducer, through buckle group, obtains data accurately to test, and needs to ensure that the center line of displacement transducer is parallel with leveling board.For main reactor pump, it is positioned at the reactor control zone having radiation, conventional displacement measurement method requires the device of a kind of fixed displacement sensor of design, the thermal walking change of main pump can be monitored steadily in the long term after Fast Installation displacement transducer, so cannot be adopted to carry out.Therefore, design meet control zone Fast Installation after the economical and practical thermal walking measurement mechanism of long term monitoring main pump thermal walking can have larger difficulty and novelty.The technical program overcomes above-mentioned defect, utilize support and stationary installation to be installed by displacement transducer, not by the impact of site environment, do not need personnel on site to operate, ensure that the accurate and effective that main pump thermal walking data are measured for a long time, avoid operating personnel to be subject to radiation injury.
The outer wall of vertical screw rod is sheathed with hold-down nut, and hold-down nut contacts with leveling board, the face size of hold-down nut is greater than groove width; The quantity of hold-down nut is two, and two hold-down nuts are all linked on the outer wall of vertical screw rod, leveling board is arranged between two hold-down nuts, and the bottom of one of them hold-down nut and the tip contact of leveling board, the top of another hold-down nut contacts with the bottom of leveling board.Have rectangle groove in the middle of leveling board, vertical screw rod allows it to regulate in the horizontal direction through groove later, and leveling board clamped by two height hold-down nuts, can regulate height and the horizontal level of displacement transducer, utilize hold-down nut to lock.
The concave surface of U-type groove and the wall contacts of displacement transducer, the convex surface of U-type groove and the end face of leveling board are fixed, two clamping screws are provided with between buckle in each buckle group, two clamping screws are all simultaneously through this buckle, and U-type groove and displacement transducer are arranged between the region of clamping screw formation.The concave of U-type groove and the outer wall of displacement transducer cooperatively interact, and contact area when installing can be maximized, fixing more firm.
The below of vertical screw rod is provided with mounting base, and the top of mounting base is vertical with the bottom of vertical screw rod to be fixed, and mounting base is provided with several bed bolts, and the bottom of bed bolt is through mounting base.The mounting base of measurement mechanism is fixed on the floor near main pump by bed bolt, and this floor does not produce displacement with variation of ambient temperature substantially, can be used as the point of fixity that absolute displacement is measured.
To sum up, the beneficial effects of the utility model are:
(1) this measurement mechanism is not by the impact of site environment, do not need personnel on site to operate, ensure that the accurate and effective that main pump thermal walking data are measured for a long time;
(2) this measurement mechanism structure is simple, processing and easy for installation, saves test funds and time;
(3) this measurement mechanism is applicable to thermal walking when main pump runs and measures test.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1.
Mark and corresponding parts title in accompanying drawing: 1-mounting base, 2-bed bolt, the vertical screw rod of 3-, 4-hold-down nut, 5-leveling board, 6-U type groove, 7-displacement transducer, 8-buckle, 9-clamping screw; 10-groove.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but embodiment of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1 and Figure 2, the mounting base 1 bottom this measurement mechanism can be fixed near main pump on floor with bed bolt 2, and this floor does not produce displacement with variation of ambient temperature substantially, can be used as the point of fixity that absolute displacement is measured.According to the version of main pump, choose the point position representing main pump thermal walking, choose thermal walking measurement mechanism can be installed main pump near floor point of fixity; Design can the measurement mechanism of stationary heat displacement transducer 7, and consider the vertical screw rod 3 of adjustment height scope and the leveling board 5 of horizon adjustable scope according to the relative distance of main pump point position and point of fixity, guarantee that the measurement mechanism designed meets field erected height and horizontal level requirement; Select the displacement transducer 7 of the band wire that can meet installing space and measuring accuracy requirement; According to displacement transducer 7 profile arrangement U-type groove 6 and processing fastener 8; U-type groove 6 is welded on leveling board 5, displacement transducer 7 is fixed in U-type groove 6 by two buckles 8, leveling board 5 is provided with two buckle groups, each buckle group is oppositely arranged by the buckle 8 that structure is identical to be formed, and the buckle 8 in each buckle group interfixes; Mounting base 1 is by the floor near bed bolt 2 fixation measuring device to main pump; Vertical screw rod 3 is fixed on mounting base 1 by the screw thread of self, leveling board 5 with displacement transducer 7 is fixed on vertical screw rod 3 by two height hold-down nuts 4, rectangle groove 10 is had in the middle of leveling board 5, vertical screw rod 3 regulates in vertical and horizontal direction through allowing it after groove 10, and two height nuts 4 can regulate the height of displacement transducer; During the installation of thermal walking measurement mechanism, displacement transducer thimble withstands on main pump measured surface, and its initial displacement is the centre position of thimble gamut.Measurement mechanism, at the scene after installation, connects displacement secondary instrument and data acquisition measuring system, after the parameter that setting data acquisition system is suitable, namely starts the long-term measurement of main pump thermal walking.Displacement transducer 7 front end thimble withstands on a facet of main pump, when main pump produces thermal walking in thermal walking sensor 7 direction, thimble slides relative to the cylinder of displacement transducer 7, generation electric signal is exported to data acquisition system (DAS) and is recorded, and the long-term stability namely achieving main pump thermal walking is measured.Can realize measuring when main pump needs only to need to repeat to install multiple thermal walking measurement mechanism during multiple thermal walking of measuring different directions differing heights.
Embodiment 2:
As shown in Figure 1 and Figure 2, on the basis of embodiment 1, leveling board 5 is provided with groove 10, vertical screw rod 3 is through groove 10, and vertically screw rod 3 can move along horizontal direction in groove 10, the outer wall of vertical screw rod 3 is sheathed with hold-down nut 4, and hold-down nut 4 contacts with leveling board 5; The quantity of hold-down nut 4 is two, and two hold-down nuts 4 are all linked on the outer wall of vertical screw rod 3, leveling board 5 is arranged between two hold-down nuts 4, and the bottom of one of them hold-down nut 4 and the tip contact of leveling board 5, the top of another hold-down nut 4 contacts with the bottom of leveling board 5.Upper and lower two hold-down nuts 4 leveling board 5 that is fixedly clamped is set by vertical screw rod 3 and regulates the height of measurement mechanism; Vertical screw rod 3, through after the leveling board 5 of hollow, can horizontally slip and regulate the horizontal level of displacement transducer 7.Hold-down nut 4 will by the fixation of vertical screw rod 3 on leveling board 5, so the face size of hold-down nut 4 is greater than groove 10 width.
Embodiment 3:
As shown in Figure 1 and Figure 2, on the basis of embodiment 1, the concave surface of U-type groove 6 and the wall contacts of displacement transducer 7, the convex surface of U-type groove 6 and the end face of leveling board 5 are fixed, two clamping screws 9 are provided with between buckle 8 in each buckle group, two clamping screws 9 are all simultaneously through this buckle 8, and U-type groove 6 and displacement transducer 7 are arranged between the region of clamping screw 9 formation; The below of vertical screw rod 3 is provided with mounting base 1, and the top of mounting base 1 is vertical with the bottom of vertical screw rod 3 to be fixed, and mounting base 1 is provided with several bed bolts 2, and the bottom of bed bolt 2 is through mounting base 1.Mounting base 1 is by the floor near bed bolt 2 fixation measuring device to main pump.In order to ensure the accuracy of testing, need to ensure that the center line of displacement transducer 7 is parallel with leveling board 5; In order to the benchmark realizing installation site can be found accurately fast, the center line of vertical screw rod 3 be arranged and the central axis of leveling board 5, the result that measurement obtains is more accurate.
Qinshan the 3rd nuclear power plant main pump vibration exceeding the standard, may cause unit unplanned shutdown, and be one of ten large defects of nuclear power plant, nuclear power plant urgently expects to solve this hot issue.Proposing main pump thermal walking is by analysis the important parameter affecting main pump vibration, the comprehensive measurement reaching 1 year has been carried out to the thermal walking of reactor operation main pump, and the thermal walking measurement mechanism of design is not by the impact of site environment, personnel on site is not needed to operate, ensure that the reliability of thermal walking measurement result, for the solution of the main pump vibration exceeding the standard problem of this reactor provides important evidence.
As mentioned above, the utility model can be realized preferably.
Claims (6)
1. one kind for measuring the measurement mechanism of main pump thermal walking, it is characterized in that, comprise leveling board (5), vertical screw rod (3) is provided with in described leveling board (5), and vertically screw rod (3) is through leveling board (5), vertical screw rod (3) can carry out vertical and move in leveling board (5); Described leveling board (5) is provided with two buckle groups, each buckle group is oppositely arranged by the buckle (8) that structure is identical to be formed, buckle (8) in each buckle group interfixes, leveling board (5) is arranged between buckle group, U-type groove (6) is provided with between buckle group, U-type groove (6) is fixed on leveling board (5), U-type groove (6) is provided with displacement transducer (7), and the two ends correspondence of displacement transducer (7) is through buckle group.
2. a kind of measurement mechanism for measuring main pump thermal walking according to claim 1, it is characterized in that, described leveling board (5) is provided with groove (10), vertical screw rod (3) is through groove (10), and vertically screw rod (3) can move along horizontal direction in groove (10), the outer wall of vertical screw rod (3) is sheathed with hold-down nut (4), and hold-down nut (4) contacts with leveling board (5), the face size of hold-down nut (4) is greater than groove (10) width.
3. a kind of measurement mechanism for measuring main pump thermal walking according to claim 2, it is characterized in that, the quantity of described hold-down nut (4) is two, and two hold-down nuts (4) are all linked on the outer wall of vertical screw rod (3), leveling board (5) is arranged between two hold-down nuts (4), the bottom of one of them hold-down nut (4) and the tip contact of leveling board (5), the top of another hold-down nut (4) contacts with the bottom of leveling board (5).
4. a kind of measurement mechanism for measuring main pump thermal walking according to claim 1, it is characterized in that, the concave surface of described U-type groove (6) and the wall contacts of displacement transducer (7), the convex surface of U-type groove (6) and the end face of leveling board (5) are fixed, two clamping screws (9) are provided with between buckle (8) in each buckle group, two clamping screws (9) are all simultaneously through this buckle (8), and U-type groove (6) and displacement transducer (7) are arranged between the region that clamping screw (9) formed.
5. a kind of measurement mechanism for measuring main pump thermal walking according to claim 1, it is characterized in that, the below of described vertical screw rod (3) is provided with mounting base (1), the top of mounting base (1) is vertical with the bottom of vertical screw rod (3) to be fixed, mounting base (1) is provided with several bed bolts (2), the bottom of bed bolt (2) is through mounting base (1).
6. a kind of measurement mechanism for measuring main pump thermal walking as claimed in any of claims 1 to 5, is characterized in that, the center line of institute's displacement sensors (7) is parallel with leveling board (5); The center line of described vertical screw rod (3) and the central axis of leveling board (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520244835.1U CN204537708U (en) | 2015-04-22 | 2015-04-22 | A kind of measurement mechanism for measuring main pump thermal walking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520244835.1U CN204537708U (en) | 2015-04-22 | 2015-04-22 | A kind of measurement mechanism for measuring main pump thermal walking |
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| CN204537708U true CN204537708U (en) | 2015-08-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779866A (en) * | 2019-11-12 | 2020-02-11 | 黑龙江省水利科学研究院 | Test device and method for measuring bonding force between bolt and ice |
| CN110904974A (en) * | 2019-09-22 | 2020-03-24 | 郜君峰 | Recyclable soil nailing wall supporting structure and construction process |
-
2015
- 2015-04-22 CN CN201520244835.1U patent/CN204537708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904974A (en) * | 2019-09-22 | 2020-03-24 | 郜君峰 | Recyclable soil nailing wall supporting structure and construction process |
| CN110779866A (en) * | 2019-11-12 | 2020-02-11 | 黑龙江省水利科学研究院 | Test device and method for measuring bonding force between bolt and ice |
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