CN201428726Y - Load control washer - Google Patents
Load control washer Download PDFInfo
- Publication number
- CN201428726Y CN201428726Y CN2009200778347U CN200920077834U CN201428726Y CN 201428726 Y CN201428726 Y CN 201428726Y CN 2009200778347 U CN2009200778347 U CN 2009200778347U CN 200920077834 U CN200920077834 U CN 200920077834U CN 201428726 Y CN201428726 Y CN 201428726Y
- Authority
- CN
- China
- Prior art keywords
- arched
- bugles
- clamping force
- bolt
- nuts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Bolts, Nuts, And Washers (AREA)
Abstract
The utility model relates to a load control washer comprising a washer main body, wherein a plurality of arched bugles is evenly distributed on the upper surface of the washer main body; another arched bugle of which the height is below the arched bugles is arranged between two adjacent arched bugles; and a circle hole is arranged at the middle of the washer main body. The utility model has the advantages of that a group of high arched bugles is firstly compacted by a bolt connection pair when in arrangement, and the bolt primary winding (pre-tightening) is finished when a group of low archedbugles is compacted to enable the starting points of nut corners to go consistent; at this time, the bolt connection pair has had a clamping force nearby the lower limit value of the clamping force, and on the basis of that, nuts are rotated into an angle degree (by the automatic control of a hydraulic spanner or an power spanner, fussy processes required by the original nut corner method like that lines are drawn on the nuts and the bolts to rotate the nuts, and the like, are not needed. ), however, the clamping force of the bolts can reach the design values which are very consistent, and theexact automatic control can be reached.
Description
Technical field
The utility model relates to a kind of load control packing ring.
Background technique
Along with the development of nation-building, high-strength bolt uses the field more and more widely.Fastening clamping force how to control high-strength bolt is a difficult point always.Chang Yong method had two kinds in the past: torque coefficient method (abbreviation calibrated wrench method) and nut corner method (being called for short the corner method), and special job specfication is arranged.Because the intrinsic defect of these two kinds of methods, important parameter torque coefficient such as calibrated wrench method is subjected to the influence in temperature, humidity and time limit very big, the first screwing torque of corner method has very big randomness (not describing in detail) herein, so can not provide qualified clamping force in some occasion.Especially up to the present diameter, goes back the effective installation method that neither one can satisfy relevant criterion or code requirement greater than the bolt of 36mm, guarantees that the bolton clamping force adheres to specification.
1962, invented a kind of load index packing ring, be commonly called direct tension indicator [DirectTension Indicators (DTIs)] now, confirmed by many professional persons and the most reliable method of conduct, guarantee correctly to install the high strength friction and connect (HSFG) bolt.DTIs is a kind of simple grommet-type load cell, the load that is otherwise known as shows packing ring, on a plane of steel packing ring, suppresses several arch protrusions (its reverse side is to there being recessed one-tenth one " pitting ") of circle distribution, the size of protrusion, quantity is decided with the packing ring diameter.
DTIs determines the fastening clamping force of high-strength bolt with the compressed degree of arch protrusion.The degree of compression has a dimensional range, is to measure with clearance gauge the earliest, and this is certain hell to pay when installation, lacks operability.Afterwards, Cooper ﹠amp; Turner Ltd pours into coloured filler in the depression of arch protrusion reverse side, when the arch protrusion was compressed, coloured filler sprayed from a tiny passage, and installation personnel comes control operation according to spray volume and position.This is known as high strength spray assembling (High StrengthSquirter Assemblies), is present more feasible method.
The above-mentioned method that the former measures requires to measure while operating, in case super stubborn, must change DTIs.The latter observes the method for spraying thing not only require the operator to have suitable experience, and require the operator to be in very conscientious observer state all the time, the photo of the Laboratory Testing Inc that TurnaSure company provides shows, before coloured filler sprays its outward appearance of demonstration, under laboratory condition, bolt has reached suitable tension force.In a word, all there is some defective in said method, and particularly they all can't realize controlling automatically accurately in construction.
The model utility content
The purpose of this utility model provides a kind of load control packing ring, to overcome at present in the method for the fastening clamping force of control high-strength bolt, can not reach the deficiency of correct automatic control.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of load control packing ring, comprise washer body, the upper surface of described washer body is evenly distributed with some arch projectioies, be provided with another arch projection lower between two adjacent arch projectioies than the height of described arch projection, the middle part of washer body is provided with circular port, the lower surface of washer body is provided with and the corresponding depression of arch projection, is provided with between two adjacent depressions and the corresponding depression of another arch projection.
The beneficial effects of the utility model are: the bolt auxiliary connection at first compresses one group of high arch projection during installation, when being compressed to one group of low arch projection, just twist the end of (pretension) as bolt, the starting point of nut corner is reached unanimity, at this moment the bolt auxiliary connection has had the clamping force near the clamping force lower limit, again angle of nut rotation (is controlled automatically by hydraulic spanner or electric wrench on this basis, not needing picture original " nut corner method " requires at nut, the loaded down with trivial details steps such as swivel nut of ruling on the bolt again), just can make the clamping force of bolt reach design load, and very consistent, and can reach control automatically accurately.
Description of drawings
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the structural representation of the described a kind of load control packing ring of the utility model embodiment;
Fig. 2 is the sectional view of the described a kind of load control packing ring of the utility model embodiment.
Among the figure:
1, washer body; 2, arch projection; 3, arch projection; 4, circular port; 5, depression; 6, depression.
Embodiment
Shown in Fig. 1-2, the described a kind of load control packing ring of the utility model embodiment, comprise washer body 1, the upper surface of described washer body 1 is evenly distributed with some arch projectioies 2, be provided with another arch projection 3 lower between two adjacent arch projectioies 2 than the height of described arch projection 2, with the power that is slightly less than bolt auxiliary connection clamping force lower limit, with 3 precompression of arch projection, the middle part of washer body 1 is provided with circular port 4, the lower surface of washer body 1 is provided with and arch projection 2 corresponding depressions 5, is provided with between two adjacent depressions 5 and another arch projection 3 corresponding depressions 6.
When concrete the use, the described a kind of load control packing ring of the utility model embodiment, earlier bolt is penetrated in the circular port 4 of washer body 1, arch projection 2,3 is by the bolt head supporting surface, bolt is penetrated in the hole of fastened member, overlap a common plain washer and nut again, begin fastening nut then.At this moment, at first compress one group of high arch projection 2, when being compressed to low one group of arch projection 3, the fastening clamping force of bolt is near the clamping force lower limit of regulation.Simultaneously, because the multiplication of compressed arch projection quantity, the electric current of pressure of the hydraulic system of construction tool (hydraulic torque wrench) or electric wrench can produce a significantly sudden change, controls construction tool with this, reach and twist correct end, can avoid manually operated error fully.No matter auxiliary connection adopts which kind of surface treatment (as galvanizing by dipping); No matter adopt which kind of surface lubrication and lubricated whether even,, still provide correct firm bolton clamping force as long as lubricated the assurance do not stick together between the auxiliary connection part.
Claims (1)
1, a kind of load control packing ring, comprise washer body (1), it is characterized in that: the upper surface of described washer body (1) is evenly distributed with some arch projectioies (2), be provided with another arch projection (3) lower between adjacent two arch projectioies (2) than the height of described arch projection (2), the middle part of washer body (1) is provided with circular port (4), the lower surface of washer body (1) is provided with and the corresponding depression of arch projection (2) (5), is provided with and the corresponding depression of another arch projection (3) (6) between adjacent two depressions (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200778347U CN201428726Y (en) | 2009-07-03 | 2009-07-03 | Load control washer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200778347U CN201428726Y (en) | 2009-07-03 | 2009-07-03 | Load control washer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201428726Y true CN201428726Y (en) | 2010-03-24 |
Family
ID=42032463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200778347U Expired - Fee Related CN201428726Y (en) | 2009-07-03 | 2009-07-03 | Load control washer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201428726Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201998A (en) * | 2015-11-09 | 2015-12-30 | 吉林大学 | Bionic gasket |
-
2009
- 2009-07-03 CN CN2009200778347U patent/CN201428726Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201998A (en) * | 2015-11-09 | 2015-12-30 | 吉林大学 | Bionic gasket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20130703 |