CN201540080U - Screw lead difference measuring tool - Google Patents
Screw lead difference measuring tool Download PDFInfo
- Publication number
- CN201540080U CN201540080U CN200920220615XU CN200920220615U CN201540080U CN 201540080 U CN201540080 U CN 201540080U CN 200920220615X U CN200920220615X U CN 200920220615XU CN 200920220615 U CN200920220615 U CN 200920220615U CN 201540080 U CN201540080 U CN 201540080U
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- China
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- screw
- screw mandrel
- fixed
- slide block
- slider
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- Expired - Lifetime
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model belongs to a measuring tool and particularly relates to a screw lead difference measuring tool. The screw lead difference measuring tool comprises a bottom plate; one end of the bottom plate is provided with a slider; the slider is provided with a ball nut; the ball nut is provided with a screw; the screw is also passed through a clamping block fixed at one end of the bottom plate; a dial indicator is fixed in one side of the clamping block by a lock screw; the side of the slider is provided with a drive screw; the slider is provided with a pull rod matched with the screw; one end of the pull rod is fixed in the slider through a nut. The screw lead difference measuring tool has the advantages that when using the tool, the lead difference of the screw can be measured exactly, and whether the ball screw and the ball nut can meet the requirement is definitely judged, thus removing the formerly judged influence according to the maintenance personnel experience, and ensuring the key component of the loading and unloading machine in a good operating state.
Description
Technical field
The utility model belongs to a kind of survey instrument, is specifically related to a kind of screw mandrel helical pitch difference measurements instrument.
Background technology
Qinshan the 3rd nuclear power plant is a CANDU type reactor nuclear power plant, and its fuel channel is a horizontal positioned, and there are 12 fuel bundles inside, and on-line refuelling is a distinguishing feature of CANDU type reactor.During normal reactor operation, finish the replacing of fuel by fuel manipulator crane.Each unit has two fuel manipulator cranes to be on active service, heavily about 10 tons of every fuel manipulator crane.When reloading, two fuel manipulator cranes are embraced and are stuck on the fuel channel, drive push rod by screw mandrel, and the stroke maximum can reach 3.19m.By the action of push rod, finish and open the major loop pressure boundary, push fresh fuel, draw off spentnuclear fuel, again the operation on closing presure border again.In the process of reloading, a plurality of steps need be carried out push rod and accurately located, and its precision can reach 0.02mm.The accurate location of push rod is to be guaranteed by four rhizoid bars in the push rod driver part.If in normal course of operation, whenever finish the reloading of fuel channel of some, just must confirm the state of critical component to the fuel manipulator crane maintenance of once disintegrating, change corresponding consumable accessory.
In various operating process, the location of screw mandrel is extremely important, and full accuracy need reach 0.02mm.In order to guarantee bearing accuracy, in maintenance process, just should check and confirm the helical pitch difference of screw mandrel.The transmission of screw mandrel is made up of ball nut, ball, ball screw, and the measurement of its helical pitch difference can't be finished with the survey instrument of routine.In original maintenance process, there is not survey instrument, personnel can only judge the state of screw mandrel and ball nut according to the maintenance experience of self.
Summary of the invention
The purpose of this utility model provides that a kind of can accurately to measure the screw mandrel helical pitch poor, finds the inordinate wear of screw mandrel early, gets rid of the helical pitch difference measurements instrument of the factor that personnel's experience judges.
The utility model is to realize like this, a kind of screw mandrel helical pitch difference measurements instrument, it comprises base plate, and an end of base plate is equipped with slide block, and slide block is provided with ball nut, ball nut is installed with screw mandrel, screw mandrel also passes the clamp of an end that is fixed on base plate, and dial gauge is fixed on a side of clamp by lock-screw, is provided with drive screw at the side of slide block, slide block is provided with the pull bar that matches with screw mandrel, and an end of pull bar is fixed on the slide block by nut.
Base plate is fixed on the back up pad, and back up pad is fixed on the inspection trolley by adjusting nut, and inspection trolley is installed on the maintenance stand.
The utility model has the advantages that, use this instrument, the helical pitch that can record screw mandrel accurately is poor, whether the clear and definite state of judging ball screw and ball nut assembly meets the demands, the influence of having judged according to maintenance personal's experience before having eliminated, guarantee the good working order that is in of fuel manipulator crane key component, guarantee the reliability service of fuel manipulator crane, guarantee the safe operation of reactor.By accumulation to the historical data of screw mandrel helical pitch difference measurements, can carry out trace analysis to the screw mandrel state, determine the safe condition of screw mandrel, provide strong support for prolonging the fuel manipulator crane active time.
Description of drawings
Fig. 1 is a kind of screw mandrel helical pitch difference measurements instrument user mode figure provided by the utility model;
Fig. 2 is a kind of screw mandrel helical pitch difference measurements instrument synoptic diagram provided by the utility model.
Among the figure, 1 maintenance stand, 2 maintenance stand dollies, 3 adjust nut, and 4 adjust nut, 5 back up pads, 6 ball nuts, 7 screw mandrels, 8 drive screws, 9 nuts, 10 pull bars, 11 slide blocks, 12 base plates, 13 lock-screws, 14 dial gauges, 15 clamps.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail:
As depicted in figs. 1 and 2, a kind of screw mandrel helical pitch difference measurements instrument, it comprises base plate 12, one end of base plate 12 is equipped with slide block 11, slide block 11 is provided with ball nut 6, be installed with screw mandrel 7 in the ball nut 6, screw mandrel 7 also passes the clamp 15 of an end that is fixed on base plate 12, dial gauge 14 is fixed on a side of clamp 15 by lock-screw 13, side at slide block 11 is provided with drive screw 8, slide block 11 is provided with the pull bar 10 that matches with screw mandrel 11, and an end of pull bar 10 is fixed on the slide block 11 by nut 9.
During screw mandrel helical pitch difference measurements, must make ball nut relative rotatablely moving not take place with ball screw.In this state, make ball nut and ball screw carry out axial motion.Distance between two axial extreme positions, the size that will measure exactly.This instrument is made up of three parts: bottom deck assembly, slide block assembly and driving screw mandrel, slide block assembly and bottom deck assembly position with dovetail groove, with the relative motion that drives between screw mandrel control slide block assembly and the floor, fixing dial gauge on base plate is measured the distance that relative motion is moved between the two.When measuring, bottom block and is connected and fixed with ball screw on the sliding support of maintenance stand; Ball nut is by close with the plate part of slide block, and is fixed into one by two pull bars and slide block.By driving screw mandrel, find ball nut and ball screw two limit of sports record in the axial direction, thereby obtain the size of helical pitch difference.
Use-pattern of the present utility model is as follows:
With two maintenance stand dollies 2 screw mandrel 7 is supported on the maintenance stand 1, and adjusts its level;
Screw mandrel back up pad on the 3rd the maintenance stand dolly 2 is removed, and frame is in the position of needs measurement then;
Remove two bolts on the clamp 15, clamp 15 is taken away;
Helical pitch difference measurements tool assembly is placed on the maintenance stand dolly 2, make 12 of base plates on the back up pad 5 of maintenance stand dolly, the groove of being opened on screw mandrel 7 and the base plate 12 is parallel, ball nut 6 be positioned at slide block 11 directly over;
By adjusting the adjustment of nut 3 and 4, make that the fluting on screw mandrel 7 and the slide block 11 agrees with fully, guarantee that simultaneously the lower plane of ball nut 6 contacts with slide block 11;
Tighten two nuts 9, ball nut 6 and slide block 11 are fused by pull bar 10;
Reverse rotation drive screw 8 makes ball nut 6 arrive the limit of sports record of other direction, the displayed value of record dial gauge 14;
Twice dial gauge displayed value subtracts each other, and the result who obtains is exactly the helical pitch difference value of measuring.
Claims (2)
1. screw mandrel helical pitch difference measurements instrument, it is characterized in that: it comprises base plate (12), one end of base plate (12) is equipped with slide block (11), slide block (11) is provided with ball nut (6), be installed with screw mandrel (7) in the ball nut (6), screw mandrel (7) also passes the clamp (15) of an end that is fixed on base plate (12), dial gauge (14) is fixed on a side of clamp (15) by lock-screw (13), side at slide block (11) is provided with drive screw (8), slide block (11) is provided with the pull bar (10) that matches with screw mandrel (11), and an end of pull bar (10) is fixed on the slide block (11) by nut (9).
2. a kind of screw mandrel helical pitch difference measurements instrument as claimed in claim 1, it is characterized in that: base plate (12) is fixed on the back up pad (5), back up pad (5) is fixed on the inspection trolley (2) by adjusting nut (3,4), and inspection trolley (2) is installed on the maintenance stand (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920220615XU CN201540080U (en) | 2009-10-30 | 2009-10-30 | Screw lead difference measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920220615XU CN201540080U (en) | 2009-10-30 | 2009-10-30 | Screw lead difference measuring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201540080U true CN201540080U (en) | 2010-08-04 |
Family
ID=42591534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920220615XU Expired - Lifetime CN201540080U (en) | 2009-10-30 | 2009-10-30 | Screw lead difference measuring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201540080U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983191A (en) * | 2014-05-29 | 2014-08-13 | 苏州新锐合金工具股份有限公司 | Hard alloy inner-cooling screw hole lead measuring instrument |
| CN106440995A (en) * | 2016-08-25 | 2017-02-22 | 南京康尼精密机械有限公司 | Gauge for detecting spiral ball groove |
| CN106949807A (en) * | 2017-04-07 | 2017-07-14 | 中国航发沈阳发动机研究所 | A kind of multistage assembling casing dimensional measuring instrument |
| CN108827129A (en) * | 2018-04-12 | 2018-11-16 | 洛阳理工学院 | A kind of screw thread flatness inspection machine of internal screw workpiece |
-
2009
- 2009-10-30 CN CN200920220615XU patent/CN201540080U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983191A (en) * | 2014-05-29 | 2014-08-13 | 苏州新锐合金工具股份有限公司 | Hard alloy inner-cooling screw hole lead measuring instrument |
| CN106440995A (en) * | 2016-08-25 | 2017-02-22 | 南京康尼精密机械有限公司 | Gauge for detecting spiral ball groove |
| CN106949807A (en) * | 2017-04-07 | 2017-07-14 | 中国航发沈阳发动机研究所 | A kind of multistage assembling casing dimensional measuring instrument |
| CN108827129A (en) * | 2018-04-12 | 2018-11-16 | 洛阳理工学院 | A kind of screw thread flatness inspection machine of internal screw workpiece |
| CN108827129B (en) * | 2018-04-12 | 2020-02-04 | 洛阳理工学院 | Thread flatness inspection machine for internal thread workpiece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100804 |
|
| CX01 | Expiry of patent term |