CN106192768A - A kind of hold down gag and steel strand prestress tensioning system - Google Patents
A kind of hold down gag and steel strand prestress tensioning system Download PDFInfo
- Publication number
- CN106192768A CN106192768A CN201610785922.7A CN201610785922A CN106192768A CN 106192768 A CN106192768 A CN 106192768A CN 201610785922 A CN201610785922 A CN 201610785922A CN 106192768 A CN106192768 A CN 106192768A
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- Prior art keywords
- anchor
- hole
- assembly
- claw collar
- steel strand
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 37
- 239000010959 steel Substances 0.000 title claims abstract description 37
- 210000000078 claw Anatomy 0.000 claims abstract description 54
- 238000004080 punching Methods 0.000 claims description 30
- 239000000446 fuel Substances 0.000 claims description 16
- 238000004873 anchoring Methods 0.000 claims description 12
- 239000007937 lozenge Substances 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of hold down gag and steel strand prestress tensioning system, hold down gag includes: stop collar, and it includes limiting section and is extended the fixed part formed by limiting section, and fixed part is provided with at least two fixing hole；The jaw clutch being sheathed on limiting section, it front claw collar including being connected to fixed part end face and the rear claw collar matched with front claw collar；It is connected to the rear claw collar clamping sleeve away from front claw collar one end；It is connected to the handle of front claw collar；Steel strand prestress tensioning system includes centre-hole jack, anchor and hold down gag.The present invention is by the rotation of the front claw collar in jaw clutch, make the crest of front claw collar and rear claw collar relative to time clamping sleeve moveable anchor is pressed in centre-hole jack, and the front crest of claw collar and the root of the tooth of rear claw collar relative to time, it is free to rotate to hole that moveable anchor is then in relaxed state, its simple operation, beneficially raising stretch-draw efficiency.
Description
Technical field
The present invention relates to steel strand anchoring technology, especially relate to a kind of hold down gag and steel strand prestress stretch-draw system
System.
Background technology
In bridge prestress is constructed, needing to carry out steel strand wires prestressed stretch-draw, existing prestressed stretch-draw mode is:
By centre-hole jack is inside and outside be respectively provided with moveable anchor and work anchor, moveable anchor and work anchor in be respectively cooperating with arranging work
Tool intermediate plate and the equal clamp of work clip sheet, tool clamping piece and work clip sheet, on steel strand wires, are then driven by centre-hole jack
Tool clamping piece and work clip sheet are away from the stretching realized steel strand wires.Owing to moveable anchor must be arranged in centre-hole jack
Portion, needs before stretch-draw by tool clamping piece manually through on steel strand wires i.e. every time, and smashes tightly with specific purpose tool, otherwise will appear from stretch-draw matter
Amount can not meet requirement, needs again to take out tool clamping piece from steel strand wires after stretch-draw, and everything is all at centre-hole jack
Inside completes, and the general 200mm of centre-hole jack diameter of bore, operation is wasted time and energy.
And, for porous asymmetric group's anchor when steel strand, can be by the Kong Yugong of work anchor by throw anchor
The hole one_to_one corresponding of tool anchor, but existing moveable anchor is all affixed to inside centre-hole jack, and its rotating operation difficulty is big,
It is difficult to hole, is easily caused stretch-draw efficiency and reduces.And, existing moveable anchor needs to arrange external screw thread so that fixing, and it is not only
The processing cost increased is unfavorable for dismounting and the replacing of moveable anchor simultaneously.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, propose a kind of hold down gag and steel strand prestress stretch-draw system
System, in solution prior art, moveable anchor cannot rotate and cause stretch-draw inefficiency and the internal setting tool anchor of centre-hole jack to be led
Cause operation easier is big, the technical problem of stretch-draw poor quality.
For reaching above-mentioned technical purpose, technical scheme provides a kind of hold down gag, including,
Stop collar, it includes tubular limiting section and is radially extended the fixed part formed by limiting section one end, described solid
Determine in portion, to be provided with at least two fixing hole；
Being sheathed on the jaw clutch on described limiting section, described jaw clutch includes being connected to fixed part end face
Front claw collar and the rear claw collar matched with described front claw collar；
Clamping sleeve, described clamping sleeve is connected to described rear claw collar away from described front claw collar one end；And
Handle, described handle be connected to described front claw collar and can drive described front claw collar relative limit portion rotate with
After driving, claw collar described limiting section relative with clamping sleeve makees axial back and forth movement.
Preferably, described limiting section outer peripheral face is provided with one along its axial arranged guide groove, on described rear claw collar
Being provided with a guider screw, described guider screw free end extends in described guide groove and can transport along described guide groove length direction
Dynamic.
Preferably, described fixing hole includes curved waist hole and the circular hole connected with one end, described curved waist hole, described circular hole
Aperture more than the width in described curved waist hole.
Meanwhile, the present invention also provides for a kind of steel strand prestress tensioning system, including,
Centre-hole jack, described centre-hole jack includes that overcoat, the punching set being built in described overcoat and one end are joined
Closing the piston being arranged between described overcoat and punching set, described outer putting arranges the first fuel feed hole and the second fuel feed hole, described
The oil-feed respectively of first fuel feed hole and the second fuel feed hole with drive described piston free end away from near described punching set；
One anchor being built in described punching set, described anchor one end is connected to the inward flange of described punching set
On；And
Hold down gag, the clamping sleeve end of described hold down gag is built in punching and overlaps and be connected to described anchor, described
The fixed part of hold down gag is fixed on described punching by fixing bolt and puts.
Preferably, described anchor includes backplate assembly, moveable anchor assembly, moves back anchor slab assembly and multiple anchoring assembly,
Described moveable anchor assembly one end is connected with described backplate assembly, the other end is connected with the described anchor slab assembly that moves back, and described backplate group
Part, moveable anchor assembly and move back and be respectively arranged with the through multiple fender eyes of one_to_one corresponding, taper anchor hole on anchor slab assembly and move back anchor
Hole；Each described anchoring assembly all includes spring, tool clamping piece and moves back anchor set, described spring be built in described fender eye and away from
Described moveable anchor assembly one end is connected on described fender eye inwall, described tool clamping piece coordinate be built in described taper anchor hole and
The bigger end of its external diameter extends in described fender eye and is connected to described spring one end end face, described in move back anchor and overlap one end and be embedded in institute
State and move back anchor hole, the other end extends in described taper anchor hole and is connected to the end face of external diameter small end of described tool clamping piece；Its
In, described clamping sleeve is connected to described backplate assembly away from moveable anchor assembly side, described moveable anchor assembly be connected to described in wear
The inward flange of heart set, described in move back anchor slab assembly and through the inward flange of described punching set and be connected to the convex of described piston free end
Edge, and described in move back anchor slab assembly be flexibly connected with described moveable anchor assembly enable described in move back anchor slab assembly drive described in move back anchor set
Back and forth movement is axially made along described taper anchor hole.
Preferably, described fender eye is shoulder hole, and described spring is built in the bigger end in aperture and the one of described shoulder hole
On the terrace that end is formed in being connected to described shoulder hole.
Preferably, described anchoring assembly also includes that a sleeve, described sleeve include a sleeve body and by body one in sleeve
Holding the first flange formed that extends radially outwardly, described spring opposite tool intermediate plate one end is sheathed on described sleeve body and abuts
In described first flange, described tool clamping piece is connected to the end face of the most described first flange one end of described sleeve body.
Preferably, described sleeve body is set to the lozenges that external diameter is gradually reduced, institute relative to first flange one end end face
State tool clamping piece the most described sleeve one end end face to be set to match with described lozenges.
Preferably, described lozenges is an outer convex arc surface, and described tool clamping piece the most described sleeve one end end face is arranged
For the interior concaved circular cambered surface matched with described outer convex arc surface.
Preferably, described tool clamping piece is three-chip type tool clamping piece.
Compared with prior art, the present invention by the rotation of the front claw collar in jaw clutch, make front claw collar with after
The crest of claw collar relative to time clamping sleeve moveable anchor is pressed in centre-hole jack, and the crest of front claw collar and rear dental inlay
Set root of the tooth relative to time, it is free to rotate to hole that moveable anchor is then in relaxed state, its simple operation, be conducive to improve stretch-draw effect
Rate.
Accompanying drawing explanation
Fig. 1 is the tension force stretching schematic diagram of the steel strand prestress tensioning system of the present invention；
Fig. 2 is the left view of Fig. 1 of the present invention；
Fig. 3 is the perspective cut away view of the hold down gag of the present invention；
Fig. 4 is the perspective cut away view of the anchor of the present invention；
Fig. 5 is the cross section view of the anchor of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1～5, the steel strand prestress tensioning system that embodiments of the invention provide includes centre-hole jack
1, anchor 2, hold down gag 3, wherein:
As it is shown in figure 1, the present embodiment centre-hole jack 1 is conventional centre-hole jack 1, it specifically includes overcoat
11, the punching set 12 and the one end fits that are built in described overcoat 11 are arranged at the piston between described overcoat 11 and punching set 12
13, described overcoat 11 arranges the first fuel feed hole 111 and the second fuel feed hole 112, described first fuel feed hole 111 and the second fuel feed hole
112 difference oil-feeds are to drive described piston 13 free end to overlap 12 away from near described punching.Due to above-mentioned centre-hole jack 1
The conventional jack bought for market, therefore at this, its structure is not described in detail.
Anchor 2 is built in described punching set 12 and its one end is connected to described punching and overlaps the inward flange of 12, its another end
Compressed by hold down gag 3.Wherein, in actual stretching process, in addition it is also necessary to arrange limiting plate 4, work anchor 5, work clip sheet 6 with
Anchor 2 mating reaction, it coordinates for existing usual manner.
As shown in Figures 1 to 3, the present embodiment hold down gag 3 includes:
Stop collar 31, it includes tubular limiting section 311 and is radially extended, by limiting section 311 one end, the fixed part formed
312, described fixed part 312 is provided with at least two fixing hole 312a；
Being sheathed on the jaw clutch 32 on described limiting section 311, described jaw clutch 32 includes being connected to fixed part
The front claw collar 321 of 312 end face and the rear claw collar 322 matched with described front claw collar 321；
Clamping sleeve 33, described clamping sleeve 33 is connected to described rear claw collar 322 away from described front claw collar 321 one end；And
Handle 34, described handle 34 is connected to described front claw collar 321 and described front claw collar 321 can be driven relatively to limit
Position portion 311 rotates and makees axial back and forth movement with claw collar 322 described limiting section 311 relative with clamping sleeve 33 after driving.
Stop collar 31 end of hold down gag 3 can be penetrated when specifically acting in punching overlaps 12 and abut anchor 2, so by it
Fixed part 312 is fixed on punching set 12 through fixing hole 312a by fixing bolt 8 afterwards, jaw clutch 32 time fixing
The crest of front claw collar 321 is oppositely arranged with the root of the tooth of rear claw collar 322, rotates front claw collar 321, rear dental inlay by handle 34
Set 322 moves along limiting section 311 axially away from fixed part 312, and then is fixed by anchor 2 by clamping sleeve 33.When
When steel strand 7 is to hole in tool clamping piece in anchor 2, front claw collar 321 can be rotated by handle 34 and make anchoring fill
Put 2 and be in relaxed state so that rotating.
And in order to avoid front claw collar 321 rotate time, rear claw collar 322 rotates simultaneously, and causes rotation efficiency low, this
Limiting section 311 outer peripheral face described in embodiment is provided with one along its axial arranged guide groove 311a, and described rear claw collar 322 is arranged
A guider screw 35, described guider screw 35 free end is had to extend in described guide groove 311a and can be along described guide groove 311a length
The motion of degree direction, can avoid rear claw collar 322 relative limit portion 311 to rotate by guide groove 311a with coordinating of guider screw 35,
After when before ensureing, claw collar 321 rotates, claw collar 322 only relative limit portion 311 makees axially-movable.
Overlap the connection of 12 for the ease of fixed part 312 and punching, fixing hole 312a described in the present embodiment includes curved waist hole
And the circular hole connected with one end, described curved waist hole, the aperture of described circular hole is more than the width in described curved waist hole, when i.e. fixing,
Fixing bolt 8 first can be fixed on punching set 12, then fix bolt 8 by screw cap end through circular hole, rotary stopper set 31
The screw rod making fixing bolt 8 is built in waist hole, and be tightened bolt 8.
As shown in Figure 1, Figure 4, Figure 5, the anchor 2 of the present embodiment can use moveable anchor and the tool clamping piece group of routine
Closing, but the mating reaction of moveable anchor and tool clamping piece still needs manual operation, its operation easier is big, therefore the present embodiment is arranged
A kind of anchor 2 that can automatically anchor and move back anchor, it include backplate assembly 21, moveable anchor assembly 22, move back anchor slab assembly 23 and
Multiple anchoring assemblies 24, described moveable anchor assembly 22 one end is connected with described backplate assembly 21, the other end moves back anchor slab group with described
Part 23 connects, and described backplate assembly 21, moveable anchor assembly 22 and move back that to be respectively arranged with one_to_one corresponding on anchor slab assembly 23 through
Multiple fender eyes 211, taper anchor hole 221 and move back anchor hole 231；Each described anchoring assembly 24 all includes spring 241, tool kit
Sheet 242 and move back anchor set 243, described spring 241 be built in described fender eye 211 and away from described moveable anchor assembly 22 one end connect
On described fender eye 211 inwall, the cooperation of described tool clamping piece 242 is built in described taper anchor hole 221 and the bigger end of its external diameter
In extending to described fender eye 211 and be connected to described spring 241 one end end face, described in move back anchor and overlap 243 one end and be embedded in described
Move back anchor hole 231, the other end extend to described taper anchor hole 221 in and be connected to the external diameter small end of described tool clamping piece 242
End face；Wherein, described clamping sleeve 33 is connected to described backplate assembly 21 away from moveable anchor assembly 22 side, described moveable anchor assembly
22 inward flanges being connected to described punching set 12, described in move back anchor slab assembly 23 and through the inward flange of described punching set 12 and be connected to
The inward flange of described piston 13 free end, and described in move back anchor slab assembly 23 be flexibly connected with described moveable anchor assembly 22 make described in move back
Anchor slab assembly 23 moves back anchor set and 243 axially makees back and forth movement along described taper anchor hole 221 described in can driving.
During installation, anchor 2 is built in punching set 12, and makes described moveable anchor assembly 22 be connected to described punching
The inward flange of set 12, described in move back anchor slab assembly 23 and through the inward flange of described punching set 12 and be connected to described piston 13 free end
Inward flange, hold down gag 3 then pushes against in backplate assembly 21.
Its concrete stretch-draw flow process is as follows, and the steel strand wires 7 first will worn in advance in beams of concrete are pre-installed work anchor 5 plate and work
Tool intermediate plate 242, then by built-in for anchor 2 centre-hole jack 1, due under the present embodiment anchor 2 conventional sense
Under the elastic acting force of spring 241, tool clamping piece 242 moves to the internal diameter small end of anchor hole, and then anchor set 243 drive is moved back in promotion
Move back anchor slab assembly 23 away from moveable anchor assembly 22, tool clamping piece 242 near the aperture small end of anchor hole time, tool clamping piece 242
Being in contraction state, it is unfavorable for that steel strand wires 7 pass, and for the ease of steel strand wires 7 through anchor 2, the present embodiment is by wearing
Second fuel feed hole 112 oil-feed of core type jack 1, make the piston 13 of centre-hole jack 1 near and extrude and move back anchor slab assembly 23,
Moving back anchor slab assembly 23 to drive and move back anchor set and 243 move to backplate assembly 21, tool clamping piece 242 is transported along taper anchor hole 221 to spring 241
Dynamic, spring 241 compresses, owing to tool clamping piece 242 is in lax to the bigger end motion in taper anchor hole 221 aperture, tool clamping piece 242
State and tool clamping piece 242 internal diameter are relatively large；Then prepackage limiting plate 4, by through the tool clamping piece 242 in work anchor 5 plate
And the steel strand wires 7 of limiting plate 4 are through automatic anchor 2, it is specially by moving back anchor hole 231 through moving back anchor set 243, tool clamping piece
242, spring 241 being passed by fender eye 211, centre-hole jack 1 free end is connected to limiting plate 4；Then the first fuel feed hole
111 oil-feeds, piston 13 free end is relatively distant from and moves back anchor slab assembly 23, and under the active force of spring 241, tool clamping piece 242 to
Anchor hole aperture small end motion internal diameter is gradually reduced and then is clamped by steel strand wires 7, continuous along with the first fuel feed hole 111 pressure oil
Adding, tool clamping piece 242 carries out tension force stretching to the steel strand wires 7 after clamping, after tension force reaches requirement, and can the second fuel feed hole
112 oil-feeds, make centre-hole jack 1 again extrude and move back anchor slab assembly 23 near moving back anchor slab assembly 23 one end, and then by moving back anchor
The tool clamping piece 242 that set 243 driving is clamped on steel strand wires 7 is to the bigger end motion in taper anchor hole 221 aperture so that it is internal diameter becomes big
Depart from from steel strand wires 7, finally dismount.The anchoring assembly 24 of the present embodiment is multiple, can enter multiple steel strand wires 7 simultaneously
Row tension force stretching, it is conducive to improving tension force stretching efficiency, and the present embodiment anchor 2 coordinates with centre-hole jack 1
Simple to operate, easy to use, efficiency is high.
Fixing for the ease of spring 241, fender eye 211 is set to shoulder hole by the present embodiment, and described spring 241 is built-in
On the terrace formed in the bigger end in the aperture of described shoulder hole and its one end are connected to described shoulder hole, thus beneficially spring
The steel strand wires 7 when also avoiding tension force stretching of fixing of 241 contact with spring 241, and it is conducive to avoiding spring 241 to be ground by steel strand wires 7
Damage, and then extend the service life of spring 241.
Further, described anchoring assembly 24 also includes that a sleeve 244, described sleeve 244 include sleeve body 244a
And the first flange 244b formed that extended radially outwardly by body one end in sleeve 244, described spring 241 opposite tool intermediate plate 242
One end is sheathed on described sleeve body 244a and is connected to described first flange 244b, and described tool clamping piece 242 is connected to described
The end face of the most described first flange 244b one end of sleeve body 244a, arranging the steel through spring 241 by sleeve 244
Twisted wire 7 is isolated with spring 241, and owing to spring 241 elastic force axially releases along fender eye 211, also allows for tool clamping piece simultaneously
242 directly abut with sleeve 244, and it is conducive to carrying out radial motion during tool clamping piece 242 axially-movable simultaneously.
In order to preferably carry out radial motion when ensureing tool clamping piece 242 axially-movable, sleeve body described in the present embodiment
244a is set to the lozenges that external diameter is gradually reduced, the described relative institute of tool clamping piece 242 relative to first flange 244b one end end face
State sleeve 244 one end end face to be set to match with described lozenges, so that tool clamping piece 242 is axial near sleeve 244
During motion, lozenges produces the tension force making tool clamping piece 242 internal diameter be gradually increased simultaneously, in order to tool clamping piece 242 twists from steel
Back off on line 7, simultaneously when tool clamping piece 242 is made to move away from sleeve 244, lozenges can reduce in tool clamping piece 242 strength by
Tapered little resistance, it is ensured that tool clamping piece 242 can preferably be clamped on steel strand wires 7.
Concrete, lozenges described in the present embodiment is an outer convex arc surface, the described the most described sleeve of tool clamping piece 242
244 one end end faces are set to the interior concaved circular cambered surface matched with described outer convex arc surface, thus further improve tool clamping piece
The effect of radial motion during 242 axially-movable.
During moving back anchor, move back anchor and overlap 243 acrokinesias by tool clamping piece 242 extrusion damage, the present embodiment institute
State and move back anchor set 243 and include moving back anchor set body 243a and by moving back the second flange formed that extends radially outwardly in the middle part of anchor set body 243a
243b, described second flange 243b external diameter more than described taper anchor hole 221 relatively described in move back anchor and overlap the internal diameter of 243 one end so that
Move back the second flange 243b when anchor set 243 motion axially moves to taper anchor hole 221 setpoint distance and be then connected to moveable anchor assembly 22
On, thus avoid it to continue axially-movable.
Meanwhile, move back anchor set 243 described in the present embodiment to be connected for threaded engagement with the described anchor hole 231 that moves back, in order to it is fixed
And change.
Wherein, in order to ensure that sleeve 244 makees axially-movable, the external diameter of described first flange 244b and institute along fender eye 211
State fender eye 211 internal diameter to agree with mutually, thus ensure that the elastic force that spring 241 produces is axial along fender eye 211, it is to avoid unbalance stress is led
Cause spring 241 damage probability to increase.
Concrete, move back anchor slab assembly 23 described in the present embodiment by least two stroke bolt 25 and described moveable anchor assembly
22 connect, and stroke bolt 25 can be axially arranged along taper anchor hole 221, so that move back anchor slab assembly 23 all the time along taper anchor hole
221 axially make back and forth movement, and can control to move back the movement travel of anchor slab assembly 23 by stroke bolt 25, it is to avoid its row that moves
Journey is excessive or too small and causes the damage of each parts.
Described in the present embodiment, tool clamping piece 242 is preferably arranged to three-chip type tool clamping piece, and it presss from both sides for this area conventional tool
Sheet, therefore not to repeat here.
Compared with prior art, the present invention by the rotation of the front claw collar in jaw clutch, make front claw collar with after
The crest of claw collar relative to time clamping sleeve anchor is pressed in centre-hole jack, and the crest of front claw collar and backteeth
Nested root of the tooth relative to time, it is free to rotate to hole that anchor is then in relaxed state, its simple operation, is conducive to improving
Draw efficiency.
The detailed description of the invention of present invention described above, is not intended that limiting the scope of the present invention.Any basis
Various other that the technology design of the present invention is made change and deformation accordingly, should be included in the guarantor of the claims in the present invention
In the range of protecting.
Claims (10)
1. a hold down gag, it is characterised in that include,
Stop collar, it includes tubular limiting section and is radially extended the fixed part formed by limiting section one end, described fixed part
On be provided with at least two fixing hole；
Being sheathed on the jaw clutch on described limiting section, described jaw clutch includes the labial teeth being connected to fixed part end face
Rear claw collar that is nested and that match with described front claw collar；
Clamping sleeve, described clamping sleeve is connected to described rear claw collar away from described front claw collar one end；And
Handle, described handle is connected to described front claw collar and described front claw collar relative limit portion can be driven to rotate to drive
Rear claw collar described limiting section relative with clamping sleeve makees axial back and forth movement.
Hold down gag the most according to claim 1, it is characterised in that described limiting section outer peripheral face is provided with along its axle
To the guide groove arranged, described rear claw collar being provided with guider screw, described guider screw free end extends in described guide groove
And can move along described guide groove length direction.
Hold down gag the most according to claim 1, it is characterised in that described fixing hole include curved waist hole and with described arc
The circular hole of one end, shape waist hole connection, the aperture of described circular hole is more than the width in described curved waist hole.
4. a steel strand prestress tensioning system, it is characterised in that include,
Centre-hole jack, described centre-hole jack includes that overcoat, the punching set being built in described overcoat and one end fits set
Being placed in the piston between described overcoat and punching set, described outer putting arranges the first fuel feed hole and the second fuel feed hole, and described first
The oil-feed respectively of fuel feed hole and the second fuel feed hole with drive described piston free end away from near described punching set；
One anchor being built in described punching set, described anchor one end is connected on the inward flange of described punching set；
And
The arbitrary described hold down gag of claims 1 to 3, the clamping sleeve end of described hold down gag is built in punching and overlaps and be connected to
Described moveable anchor, the fixed part of described hold down gag is fixed on described punching by fixing bolt and puts.
Steel strand prestress tensioning system the most according to claim 4, it is characterised in that described anchor includes backplate group
Part, moveable anchor assembly, move back anchor slab assembly and multiple anchoring assembly, described moveable anchor assembly one end is connected with described backplate assembly,
The other end is connected with the described anchor slab assembly that moves back, and described backplate assembly, moveable anchor assembly and moving back is respectively arranged with on anchor slab assembly
Multiple fender eyes, taper anchor hole that one_to_one corresponding is through and move back anchor hole；Each described anchoring assembly all includes spring, tool clamping piece
And moving back anchor set, described spring is built in described fender eye and is connected to described fender eye inwall away from described moveable anchor assembly one end
On, described tool clamping piece coordinate be built in described taper anchor hole and the bigger end of its external diameter extend to described fender eye in and be connected to
Described spring one end end face, described in move back anchor overlap one end be embedded in described in move back anchor hole, the other end extends in described taper anchor hole also
It is connected to the end face of the external diameter small end of described tool clamping piece；Wherein, described clamping sleeve is connected to described backplate assembly away from work
Tool anchor assemblies side, described moveable anchor assembly be connected to described punching set inward flange, described in move back anchor slab assembly pass described in wear
The inward flange of heart set is also connected to the inward flange of described piston free end, and described in move back anchor slab assembly and live with described moveable anchor assembly
Be dynamically connected described in enabling move back anchor slab assembly drive described in move back anchor set and axially make back and forth movement along described taper anchor hole.
Steel strand prestress tensioning system the most according to claim 5, it is characterised in that described fender eye is shoulder hole, institute
State spring be built in the bigger end in aperture of described shoulder hole and its one end be connected to described shoulder hole on the terrace that formed.
Steel strand prestress tensioning system the most according to claim 6, it is characterised in that described anchoring assembly also includes a set of
Cylinder, described sleeve includes a sleeve body and is extended radially outwardly the first flange formed by body one end in sleeve, described spring
Opposite tool intermediate plate one end is sheathed on described sleeve body and is connected to described first flange, and described tool clamping piece is connected to described
The end face of the most described first flange one end of sleeve body.
Steel strand prestress tensioning system the most according to claim 7, it is characterised in that described sleeve body is convex relative to first
Edge one end end face is set to the lozenges that external diameter is gradually reduced, described tool clamping piece the most described sleeve one end end face be set to
Described lozenges matches.
Steel strand prestress tensioning system the most according to claim 8, it is characterised in that described lozenges is an evagination circular arc
Face, described tool clamping piece the most described sleeve one end end face is set to the interior concaved circular cambered surface matched with described outer convex arc surface.
Steel strand prestress tensioning system the most according to claim 9, it is characterised in that described tool clamping piece is three-chip type
Tool clamping piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785922.7A CN106192768B (en) | 2016-08-31 | 2016-08-31 | A kind of pressing device and steel strand prestress tensioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785922.7A CN106192768B (en) | 2016-08-31 | 2016-08-31 | A kind of pressing device and steel strand prestress tensioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106192768A true CN106192768A (en) | 2016-12-07 |
| CN106192768B CN106192768B (en) | 2018-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610785922.7A Active CN106192768B (en) | 2016-08-31 | 2016-08-31 | A kind of pressing device and steel strand prestress tensioning system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108373124A (en) * | 2017-12-12 | 2018-08-07 | 柳州市建桥预应力智能设备有限公司 | Turnable jack |
| CN108468275A (en) * | 2018-02-01 | 2018-08-31 | 重庆恒佳工程技术咨询有限公司 | A kind of prestressing force intelligent tensioning system |
| CN108584753A (en) * | 2018-03-28 | 2018-09-28 | 哈尔滨工程大学 | Oscillating oil cylinder formula steel strand wires clamping device |
| CN108951428A (en) * | 2018-08-30 | 2018-12-07 | 湖北科技学院 | A kind of bridge prestress tensioning equipment |
| CN110295547A (en) * | 2019-08-08 | 2019-10-01 | 中国建筑第四工程局有限公司 | Continuous Rigid-Frame Bridge presstressed reinforcing steel construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108373124A (en) * | 2017-12-12 | 2018-08-07 | 柳州市建桥预应力智能设备有限公司 | Turnable jack |
| CN108468275A (en) * | 2018-02-01 | 2018-08-31 | 重庆恒佳工程技术咨询有限公司 | A kind of prestressing force intelligent tensioning system |
| CN108584753A (en) * | 2018-03-28 | 2018-09-28 | 哈尔滨工程大学 | Oscillating oil cylinder formula steel strand wires clamping device |
| CN108951428A (en) * | 2018-08-30 | 2018-12-07 | 湖北科技学院 | A kind of bridge prestress tensioning equipment |
| CN110295547A (en) * | 2019-08-08 | 2019-10-01 | 中国建筑第四工程局有限公司 | Continuous Rigid-Frame Bridge presstressed reinforcing steel construction method |
| CN110295547B (en) * | 2019-08-08 | 2020-11-17 | 中国建筑第四工程局有限公司 | Construction method of continuous rigid frame bridge prestressed tendon |
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Effective date of registration: 20231030 Address after: 412007 Haitian Road, Tianyuan District, Zhuzhou, Hunan Province, No. 18 Patentee after: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: No. 359 Tuanshan Avenue, High tech Zone, Xiangfan City, Hubei Province, 441047 Patentee before: XIANGYANG CHINA RAILWAY HONGJI ENGINEERING CO.,LTD. |