CN109764845A - One kind being based on reverse drawing method front end steel strand wires displacement detector - Google Patents
One kind being based on reverse drawing method front end steel strand wires displacement detector Download PDFInfo
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- CN109764845A CN109764845A CN201910184217.5A CN201910184217A CN109764845A CN 109764845 A CN109764845 A CN 109764845A CN 201910184217 A CN201910184217 A CN 201910184217A CN 109764845 A CN109764845 A CN 109764845A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 179
- 239000010959 steel Substances 0.000 title claims abstract description 179
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000002441 reversible effect Effects 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 76
- 238000005191 phase separation Methods 0.000 claims abstract description 25
- 239000000523 sample Substances 0.000 claims description 17
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000000418 atomic force spectrum Methods 0.000 description 3
- 230000036316 preload Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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Abstract
The invention discloses one kind to be based on reverse drawing method front end steel strand wires displacement detector, position-limiting drum including being provided with centre bore, the stretching amount detecting device for detecting Method of Steel Strand Stretching amount, the centre bore is for wearing steel strand wires, the stretching amount detecting device is installed on position-limiting drum, and the checkpoint for stretching amount detecting device is located at position-limiting drum for one end with anchorage phase separation.This detection device can prevent or reduce prestress detection under the premise of guaranteeing detection accuracy and be drawn to collapse risk to loss brought by steel strand wires bearing capacity, reduction steel strand wires.
Description
Technical field
The present invention relates to civil engineering quality safety detection technique fields, are based on reverse drawing method front end steel more particularly to one kind
Twisted wire displacement detector.
Background technique
Prestressed size is to influence normal use performance in structure service phase to refer mainly in prestressed reinforced concrete construction
Mark, the detection method generallyd use both at home and abroad at present are broadly divided into two classes: detection and directly detection indirectly.
Indirect detection technique mainly has: acoustic emission, galvanomagnetic-effect detect skill and technique, ultrasonic Detection Method, Dynamic testing
Method and anchor end prestressing force measuring technology, measuring accuracy are relatively low.
Direct Inspection Technology mainly has: presstressed reinforcing steel Direct Inspection Technology, stress free method and reverse drawing method.Wherein, in advance
Stress rib Direct Inspection Technology, stress free method are due to needing pre-buried sensor, to limit its scope of application, reverse drawing rule
It is current the most frequently used most reliable detection technique.
The type of reverse drawing method has very much, is broadly divided into entire beam tension and single tendon stretch.Wherein, entire beam tension is to anchor head
Each steel strand wires simultaneous tension to measure the effective prestress of entire anchor head, single tendon stretch is then to twist respectively to each steel
Line carries out tensioning, and the sum of test prestressing force is the effective prestress of anchorage.No matter which kind of method, be generally both needed to test simultaneously
Stretching force and steel strand wires elongation, and be fitted and draw out F-S prestressing force curve, as shown in Figure 2.
When the detection of reverse drawing method starts, counter pull slowly increases, and all parts equipment room gap is further excluded, this stage
Counter pull increase is smaller, and is displaced and increases sharply, and slope is smaller on F-S prestressing force curve, OA section as shown in figure 1；OA sections of knots
Beam, gap is all compacted between all parts, this stage increases with counter pull, and displacement increment is the elasticity of active section steel strand wires
Deformation, slope of a curve tend towards stability, AB section as shown in figure 1；AB sections of ends, counter pull reach under balance anchor effective prestress with
The sum of stiction, counter pull continuous action, completion overcome frictional force, at this point, prestress system will carry out an adjustment, such as scheme
BC section in 1, the friction between this stage intermediate plate and anchorage disappear, and intermediate plate will be displaced outwardly with steel strand wires, until being limited
Plate (cylinder) limits；After intermediate plate loosens, counter pull continues to increase, and displacement increment is anchor cable under active section steel strand wires and anchor at this time
The sum of flexible deformation, it is clear that unit counter pull bring displacement is much bigger at this time, and slope reduces on F-S prestressing force curve,
CD section as shown in figure 1.
It is intuitive and easy to understand using reverse drawing method test its test result of effective prestress, and accuracy is higher, BC as shown in figure 1
Section can use C point to stress value, when not considering frictional force, can use B point to stress value when considering frictional force.
The structure design for advanced optimizing the steel strand prestress detection device based on reverse drawing method, so that it can be more preferable
Serve civil engineering quality safety detection, be those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
It is designed for the structure for advanced optimizing the steel strand prestress detection device based on reverse drawing method set forth above, with
It is that those skilled in the art's technology urgently to be resolved is asked so as to preferably serve the detection of civil engineering quality safety
Topic, the present invention provides one kind to be based on reverse drawing method front end steel strand wires displacement detector.This detection device is guaranteeing detection accuracy
Under the premise of, it can prevent or reduce prestress detection and loss brought by steel strand wires bearing capacity, reduction steel strand wires are drawn to collapse wind
Danger.
In view of the above-mentioned problems, it is provided by the invention it is a kind of passed through based on reverse drawing method front end steel strand wires displacement detector it is following
Technical essential solves the problems, such as: one kind is based on reverse drawing method front end steel strand wires displacement detector, the limit including being provided with centre bore
Position cylinder, the stretching amount detecting device for detecting Method of Steel Strand Stretching amount, the centre bore is for wearing steel strand wires, the amount of tension
Detection device is installed on position-limiting drum, and the checkpoint for stretching amount detecting device is located at position-limiting drum and is used for and anchorage phase separation
One end.
Currently, reverse drawing method is when implementing, for the displacement detecting of steel strand wires, generally by the displacement of detection jack
It realizes, however, this results in reverse drawing method to detect steel due to the steel strand wires active section between intermediate plate and jack there are non-preload
Twisted wire prestressing force has that steel strand wires pull Bit andits control difficulty big when implementing.Tensioning is being carried out to steel strand wires simultaneously
When, intermediate plate can generate the relative displacement between cone mouth with the displacement of steel strand wires.At this point, due to intermediate plate, the modeling of cone mouth generation
Property deformation and intermediate plate rotation is inevitably generated in displacement process, so that intermediate plate can not be complete in just smaller put
Retract to original position.The difference of the position is bigger, also bigger to the adverse effect of structural ultimate bearing capacity.
As mentioned previously, because existing anti-tension test does not take special limitation to the amount of tension of steel strand wires, it is another
The moment that aspect cannot be loosened in intermediate plate stops tensioning, otherwise can not draw complete F-S curve graph, i.e. detection will failure.When
When steel strand wires elongation is larger, it is difficult to ensure that amount of recovery is within 1mm, to generate very unfavorable shadow to prestress system
It rings.
In the present solution, the stretching amount detecting device is used to detect amount of tension of the steel strand wires in tensioning, i.e. stretching displacement,
Checkpoint by being limited to detection device is located at position-limiting drum for the end position with anchorage phase separation, in this way, can effectively keep away
Exempt from the elongation of steel strand wires active section to detection device collected data influence, i.e. detection device fetched data is exactly steel
Twisted wire pre-tightens the tensile elongation amount of section, in this way, when the above displacement or elongation reach setting for specific steel strand wires pretightning force detection
After definite value, the oil pump of jack stops working, that is, can reach and effectively prevent ultra stretching, make the result of detection more accurate, can
The purpose leaned on.Meanwhile prevent above ultra stretching can prevent or reduce prestress detection to brought by steel strand wires bearing capacity loss,
It reduces steel strand wires and is drawn and collapse risk.It is set as detection device to be installed on position-limiting drum, it is intended to so that this detection device is twisted with steel
When line rotates, detection device can be synchronized with position-limiting drum rotation, not only can avoid some connecting lines in this detection device in this way
Cable Joint failure, while can guarantee the accuracy of testing result.
As those skilled in the art, the checkpoint of the stretching amount detecting device defined above is used for positioned at position-limiting drum
With one end of anchorage phase separation, it should be understood that positioned at position-limiting drum, the end of anchorage or near the end；It is described
Stretching amount detecting device can be used the contact displacement measurement directly contacted with steel strand wires, and contactless displacement inspection also can be used
Survey sensor etc..
Further technical solution are as follows:
A kind of specific implementation as specific contact displacement measurement of steel stranded wire: the stretching amount detecting device packet
Displacement sensor, sensor probe and steel strand wires deck are included, the steel strand wires deck with steel strand wires for being fixedly connected, and steel twists
Tie point of the line card seat on steel strand wires is located at: position-limiting drum is used for and the steel strand wires at an end position of anchorage phase separation；
Intermediate connector of the sensor probe as steel strand wires deck and displacement sensor, is drawn out in steel strand wires
When, steel strand wires deck is moved with steel strand wires, and the moving displacement of steel strand wires is transmitted on displacement sensor by sensor probe.It adopts
With this programme, it is intended to using contact type measurement it is more accurate, conveniently, the lower feature of cost.
As the specific implementation of steel strand wires deck, the steel strand wires deck includes spring card, the steel strand wires card
Fixation of the seat on steel strand wires passes through: the pressure that steel strand surface is applied to after spring stand elastic deformation is realized.This programme exists
It only needs to obtain the benchmark for being used for displacement measurement and moving synchronously with steel strand wires on steel strand wires when it is implemented, being equivalent to
Point, therefore actually steel strand wires deck only includes spring card, such as spring card annular in shape can be clamped directly at steel strand wires
Above and with steel strand wires move synchronously；Also may be configured as deck is split type structure, and the spring card is used for as composition steel strand wires
Each section of deck applies the pressure towards steel strand wires side.
Since reverse drawing method prestress detection is when implementing, this detection device may be rotated with steel strand wires, be stretched for protection
Amount detecting device, the implementation as a kind of stretching amount detecting device compared to the embedded installation of position-limiting drum, setting are as follows: the limit
Position cylinder is used for and is additionally provided with first side hole on one end of anchorage phase separation, originates in position-limiting drum on the outside of the first side hole
Side, inside terminate in the concentric holes of position-limiting drum；
The inside in the first side hole and steel strand wires deck are located at the same axial location of position-limiting drum, the conduct of first side hole
Operator operates steel strand wires deck to the handle hole of steel strand wires clamping condition on the outside of position-limiting drum；
Further include second side face being arranged between position-limiting drum both ends, originates in position-limiting drum on the outside of second side face
Side, institute's displacement sensors are installed in second side face, further include for covering on the outside of second side face
The card slot housing in aperture；
The sensor probe is located on the inside of position-limiting drum.Using this programme, amount detecting device is stretched compared to position-limiting drum
The embedded installation in outside, can effectively avoid position-limiting drum in rotation in this way, stretches around amount detecting device and detected steel strand wires
Steel strand wires interfere with each other, and influence the normal work of this detection device or bring damage to this detection device.As art technology
Personnel, due to being needed on position-limiting drum with the channel extended for sensor probe, in the specific implementation, using position-limiting drum
Centre bore is as the channel, and being preferably arranged to the channel is the channel independently of position-limiting drum centre bore, such as on position-limiting drum
The channel is drilled, is directly interfered on sensor probe or displacement sensor to avoid the steel strand wires in position-limiting drum.It is being adopted as
When independent channel, second side face is set as blind hole.
Since the reverse drawing method jack pulling force required when implementing is very big, it is contemplated that position-limiting drum is used for and jack
Influence of the deformation of one end of phase separation to position-limiting drum service life, setting are as follows: further include tubular protection tail sleeve, the guarantor
Tail sleeve is protected in this detection device in use, with installing in position-limiting drum pair, and protects centre of the tail sleeve as position-limiting drum and jack
Connector.Using this programme, in the end transition plastic deformation for protecting tail sleeve, can be protected using the form of replacement protection tail sleeve
The normal use of this detection device is demonstrate,proved, in this way, the use cost of this detection device can be reduced.
As noted previously, as the case where there are position-limiting drum rotations, for enable this detection device and external wiring by
Interfered to constraint to avoid the wiring of the outside or connection cables, is arranged are as follows: further include being fixed on position-limiting drum or protecting
The cable retainer in tail sleeve is protected, the cable retainer is used to constrain the cable in this detection device.As art technology
Personnel, the cable retainer are that corresponding purpose can be achieved in fixture, binding rope etc..
As a kind of perfect technical solution, setting are as follows: further include for constraining the relative position of position-limiting drum and anchorage, using
In providing the jack of tractive force for steel strand wires.
In the specific implementation due to reverse drawing method, the case where there are intermediate plates relative to anchorage relative displacement, the above relative displacement
Intermediate plate is moved with steel strand wires towards position-limiting drum side in the process, to avoid intermediate plate from being destroyed in moving process, influences steel strand wires
The performance parameter of anchor system after retraction, setting are as follows: the position-limiting drum is for the center bore ends with one end of anchorage phase separation
Hole section is in countersunk, and position-limiting drum is used to be greater than with the centre bore end aperture of one end of anchorage phase separation the outer diameter of intermediate plate.
To limit the direction that steel strand wires are drawn out, setting are as follows: further include being mounted on position-limiting drum to be used for and anchorage phase separation
Deck limiter on one end, the deck limiter is for limiting the direction that steel strand wires are drawn out, the direction being drawn out
For along the axis direction of intermediate plate.Using this programme, it can effectively avoid steel strand wires when being stretched positioned at the twisted wire of anchorage position
Line segment, which bends and causes steel strand wires itself, to be destroyed.It can be for positioned at limit with the specific implementation of upper blocking seat limiter
The necking segment of position cylinder end, the necking segment are the part of position-limiting drum centre bore, are preferably arranged to be embedded in position-limiting drum centre bore
Sleeve, the necking segment be sleeve centre bore, in this way, the set of different model can be used according to the steel strand wires of different model
Cylinder completes constraint to steel strand wires, in this way, the mutual relationship of the sleeve of different model is are as follows: and mutual outer diameter is consistent,
Internal diameter is different.
The invention has the following advantages:
In the present solution, the stretching amount detecting device is used to detect amount of tension of the steel strand wires in tensioning, i.e. stretching displacement,
Checkpoint by being limited to detection device is located at position-limiting drum for the end position with anchorage phase separation, in this way, can effectively keep away
Exempt from the elongation of steel strand wires active section to detection device collected data influence, i.e. detection device fetched data is exactly steel
Twisted wire pre-tightens the tensile elongation amount of section, in this way, when the above displacement or elongation reach setting for specific steel strand wires pretightning force detection
After definite value, the oil pump of jack stops working, that is, can reach and effectively prevent ultra stretching, make the result of detection more accurate, can
The purpose leaned on.Meanwhile prevent above ultra stretching can prevent or reduce prestress detection to brought by steel strand wires bearing capacity loss,
It reduces steel strand wires and is drawn and collapse risk.It is set as detection device to be installed on position-limiting drum, it is intended to so that this detection device is twisted with steel
When line rotates, detection device can be synchronized with position-limiting drum rotation, not only can avoid some connecting lines in this detection device in this way
Cable Joint failure, while can guarantee the accuracy of testing result.
Detailed description of the invention
Fig. 1 is the reverse drawing F- obtained by test stretching force and steel strand wires elongation in the detection of existing steel strand prestress
S curve；
Fig. 2 is of the present invention a kind of based on reverse drawing method front end one specific embodiment of steel strand wires displacement detector
Structure sectional view, while the cross-sectional view reflects when this detection device uses and the mated condition of anchorage.
Figure acceptance of the bid note is respectively as follows: 1, intermediate plate, 2, deck limiter, 3, sensor probe, 4, card slot housing, 5, displacement sensing
Device, 6, steel strand wires, 7, cable retainer, 8, jack, 9, protection tail sleeve, 10, position-limiting drum, 11, steel strand wires deck, 12, spring
Card, 13, anchorage.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, but the present invention is not limited only to following implementation
Example:
Embodiment 1:
As shown in Fig. 2, a kind of be based on reverse drawing method front end steel strand wires displacement detector, the limit including being provided with centre bore
Cylinder 10, the stretching amount detecting device for detecting 6 amount of tension of steel strand wires, the centre bore is for wearing steel strand wires 6, the stretching
Amount detecting device is installed on position-limiting drum 10, and the checkpoint for stretching amount detecting device is located at position-limiting drum 10 and is used for and anchorage 13
One end of phase separation.
Currently, reverse drawing method is when implementing, for the displacement detecting of steel strand wires 6, generally by the displacement of detection jack 8
What amount was realized, however, this results in reverse drawing method due to 6 active section of steel strand wires between intermediate plate 1 and jack 8 there are non-preload
6 prestressing force of steel strand wires is detected when implementing, there is a problem of that steel strand wires 6 pull Bit andits control difficulty big.Simultaneously to steel strand wires 6
When carrying out tensioning, intermediate plate 1 can generate the relative displacement between cone mouth with the displacement of steel strand wires 6.At this point, due to intermediate plate 1, cone
Mouthful plastic deformation generated and intermediate plate 1 are inevitably generated rotation in displacement process, thus in just smaller put,
Intermediate plate 1 can not be fully retracted to original position.The difference of the position is bigger, also to the adverse effect of structural ultimate bearing capacity
It is bigger.
As mentioned previously, because existing anti-tension test does not take special limitation to the amount of tension of steel strand wires 6, it is another
The moment that aspect cannot be loosened in intermediate plate 1 stops tensioning, otherwise can not draw complete F-S curve graph, i.e. detection will failure.When
When 6 elongation of steel strand wires is larger, it is difficult to ensure that amount of recovery is within 1mm, to generate very unfavorable shadow to prestress system
It rings.
In the present solution, the stretching amount detecting device for detecting amount of tension of the steel strand wires 6 in tensioning, that is, stretches position
It moves, the checkpoint by being limited to detection device is located at position-limiting drum 10 for the end position with 13 phase separation of anchorage, in this way, can
Effectively avoid influence of the elongation of 6 active section of steel strand wires to the collected data of detection device institute, i.e., it is several acquired in detection device
According to the tensile elongation amount for being exactly the preload section of steel strand wires 6, in this way, being pre-tightened when the above displacement or elongation reach specific steel strand wires 6
After the setting value of power detection, the oil pump of jack 8 stops working, that is, the result that can reach and effectively prevent ultra stretching, make detection
It is more accurate, reliable purpose.Meanwhile preventing ultra stretching from can prevent or reducing prestress detection to 6 bearing capacity of steel strand wires above
Brought loss, reduction steel strand wires 6 collapse risk by drawing.Detection device is set as to be installed on position-limiting drum 10, it is intended to so that this
For detection device when rotating with steel strand wires 6, detection device can be synchronized with the rotation of position-limiting drum 10, not only can avoid this detection in this way
Some connection cables Joint failures on device, while can guarantee the accuracy of testing result.
As those skilled in the art, the checkpoint of the stretching amount detecting device defined above is located at the use of position-limiting drum 10
In one end with 13 phase separation of anchorage, it should be understood that positioned at the end of position-limiting drum 10 or near the end；Institute
Stating stretching amount detecting device can be used the contact displacement measurement directly contacted with steel strand wires 6, and contactless position also can be used
Move detection sensor etc..
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, as shown in Fig. 2, as a kind of specific contact
The specific implementation of 6 displacement measurement of steel strand wires: the stretching amount detecting device include displacement sensor 5, sensor probe 3 and
Steel strand wires deck 11, the steel strand wires deck 11 with steel strand wires 6 for being fixedly connected, and steel strand wires deck 11 is on steel strand wires 6
Tie point be located at: position-limiting drum 10 be used for and the steel strand wires 6 at an end position of 13 phase separation of anchorage；
Intermediate connector of the sensor probe 3 as steel strand wires deck 11 and displacement sensor 5, in 6 quilt of steel strand wires
When pull-out, steel strand wires deck 11 is moved with steel strand wires 6, and the moving displacement of steel strand wires 6 is transmitted to displacement by sensor probe 3 and passes
On sensor 5.Using this programme, it is intended to using contact type measurement it is more accurate, conveniently, the lower feature of cost.
As the specific implementation of steel strand wires deck 11, the steel strand wires deck 11 includes spring card 12, the steel
Twisted wire deck 11 passes through in the fixation on steel strand wires 6: the pressure that 6 surface of steel strand wires is applied to after spring stand elastic deformation is real
It is existing.This programme in the specific implementation, is equivalent to and only needs to obtain one on steel strand wires 6 for displacement measurement and with steel strand wires 6
The datum mark moved synchronously, therefore actually steel strand wires deck 11 only includes spring card 12, such as spring card annular in shape
12 can be clamped directly on steel strand wires 6 and move synchronously with steel strand wires 6；Also may be configured as deck is split type structure, the bullet
Spring card 12 is used to apply the pressure towards 6 side of steel strand wires for each section of composition steel strand wires deck 11.
Since reverse drawing method prestress detection is when implementing, this detection device may be rotated with steel strand wires 6, be stretched for protection
Amount detecting device, the implementation as a kind of stretching amount detecting device compared to the embedded installation of position-limiting drum 10, setting are as follows: described
Position-limiting drum 10 is used for and is additionally provided with first side hole on one end of 13 phase separation of anchorage, originates on the outside of the first side hole
Side, the inside of position-limiting drum 10 terminate in the concentric holes of position-limiting drum 10；
The inside in the first side hole and steel strand wires deck 11 are located at the same axial location of position-limiting drum 10, first side hole
Steel strand wires deck 11 is operated on the outside of position-limiting drum 10 as operator to the handle hole of 6 clamping condition of steel strand wires；
Further include second side face being arranged between 10 both ends of position-limiting drum, originates in limit on the outside of second side face
The side of cylinder 10, it further includes for covering second side face that institute's displacement sensors 5, which are installed in second side face,
The card slot housing 4 in outside aperture；
The sensor probe 3 is located at 10 inside of position-limiting drum.Using this programme, amount detecting device is stretched compared to position-limiting drum
The embedded installation in 10 outside, can effectively avoid position-limiting drum 10 in rotation in this way, stretches amount detecting device and detected steel strand wires 6
The steel strand wires 6 of surrounding interfere with each other, and influence the normal work of this detection device or bring damage to this detection device.As ability
Field technique personnel in the specific implementation, can benefit due to being needed on position-limiting drum 10 with the channel extended for sensor probe 3
Use the centre bore of position-limiting drum 10 as the channel, being preferably arranged to the channel is independently of the logical of 10 centre bore of position-limiting drum
Road such as drills the channel on position-limiting drum 10, to avoid the steel strand wires 6 in position-limiting drum 10 directly interfere with sensor probe 3 or
On displacement sensor 5.When using channel is independent, second side face is set as blind hole.
Since reverse drawing method jack 8 pulling force required when implementing is very big, it is contemplated that position-limiting drum 10 is used for and thousand
Influence of the deformation of one end of jin 8 phase separations of top to 10 service life of position-limiting drum, setting are as follows: further include tubular protection tail sleeve
9, the protection tail sleeve 9 in this detection device in use, with 10 pairs of position-limiting drum in install, and protect tail sleeve 9 be used as position-limiting drum 10
With the intermediate connector of jack 8.It is protected in the end transition plastic deformation for protecting tail sleeve 9 using replacement using this programme
The form of tail sleeve 9 is that can guarantee the normal use of this detection device, in this way, can reduce the use cost of this detection device.
As noted previously, as the case where there are the rotations of position-limiting drum 10, to enable this detection device and external wiring
It suffers restraints and is interfered to avoid the wiring of the outside or connection cables, is arranged are as follows: further include being fixed on position-limiting drum 10
Or the cable retainer 7 in protection tail sleeve 9, the cable retainer 7 are used to constrain the cable in this detection device.As ability
Field technique personnel, the cable retainer 7 are that corresponding purpose can be achieved in fixture, binding rope etc..
As a kind of perfect technical solution, setting are as follows: further include the opposite position for constraining position-limiting drum 10 Yu anchorage 13
It sets, for providing the jack 8 of tractive force for steel strand wires 6.
In the specific implementation due to reverse drawing method, the case where there are intermediate plates 1 relative to 13 relative displacement of anchorage, the above opposite position
Intermediate plate 1 is moved with steel strand wires 6 towards 10 side of position-limiting drum during shifting, to avoid intermediate plate 1 from being destroyed in moving process, is influenced
The performance parameter of anchor system after steel strand wires 6 bounce back, setting are as follows: the position-limiting drum 10 is used for and one end of 13 phase separation of anchorage
Centre bore end hole section is in countersunk, and position-limiting drum 10 is for big with the centre bore end aperture of one end of 13 phase separation of anchorage
In the outer diameter of intermediate plate 1.
To limit the direction that steel strand wires 6 are drawn out, setting are as follows: further include being mounted on position-limiting drum 10 for making with 13 phase of anchorage
Deck limiter 2 on one end, the deck limiter 2 are described to be drawn out for limiting the direction that steel strand wires 6 are drawn out
Direction be along intermediate plate 1 axis direction.Using this programme, it can effectively avoid steel strand wires 6 and be located at anchorage 13 when being stretched
The twisted wire line segment of position bends and steel strand wires 6 itself is caused to be destroyed.With the specific implementation side of upper blocking seat limiter 2
Formula can be preferably arranged to embed for positioned at the necking segment of 10 end of position-limiting drum, which is the part of 10 centre bore of position-limiting drum
Sleeve in 10 centre bore of position-limiting drum, the necking segment are the centre bore of sleeve, in this way, according to the steel strand wires 6 of different model,
The sleeve that different model can be used completes constraint to steel strand wires 6, in this way, the mutual relationship of the sleeve of different model is
Are as follows: mutual outer diameter is consistent, and internal diameter is different.
The above content is combine specific preferred embodiment to the further description of the invention made, and it cannot be said that originally
The specific embodiment of invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
The other embodiments obtained in the case where not departing from technical solution of the present invention, should be included within the scope of the present invention.
Claims (9)
1. one kind is based on reverse drawing method front end steel strand wires displacement detector, including being provided with the position-limiting drum (10) of centre bore, being used for
The stretching amount detecting device of steel strand wires (6) amount of tension is detected, the centre bore is for wearing steel strand wires (6), which is characterized in that institute
It states stretching amount detecting device to be installed on position-limiting drum (10), the checkpoint for stretching amount detecting device is located at position-limiting drum (10) use
In one end with anchorage (13) phase separation.
2. according to claim 1 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that described
Stretching amount detecting device includes displacement sensor (5), sensor probe (3) and steel strand wires deck (11), the steel strand wires deck
(11) for being fixedly connected with steel strand wires (6), and tie point of the steel strand wires deck (11) on steel strand wires (6) is located at: position-limiting drum
(10) it is used for and the steel strand wires (6) at an end position of anchorage (13) phase separation；
Intermediate connector of the sensor probe (3) as steel strand wires deck (11) and displacement sensor (5), in steel strand wires quilt
When pull-out, steel strand wires deck (11) is moved with steel strand wires (6), and the moving displacement of steel strand wires (6) is transmitted by sensor probe (3)
To on displacement sensor (5).
3. according to claim 2 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that described
Steel strand wires deck (11) includes spring card (12), and fixation of the steel strand wires deck (11) on steel strand wires (6) passes through: spring
The pressure that steel strand wires (6) surface is applied to after deck (12) elastic deformation is realized.
4. according to claim 2 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that described
Position-limiting drum (10) is used for and is additionally provided with first side hole on one end of anchorage (13) phase separation, rises on the outside of the first side hole
Start from the side of position-limiting drum (10), inside terminates in the concentric holes of position-limiting drum (10)；
The inside and steel strand wires deck (11) in the first side hole are located at position-limiting drum (10) same axial location, first side hole
Steel strand wires deck (11) are operated on the outside of position-limiting drum (10) as operator to the handle hole of steel strand wires (6) clamping condition；
Further include second side face being arranged between position-limiting drum (10) both ends, originates in position-limiting drum on the outside of second side face
(10) side, institute's displacement sensors (5) are installed in second side face, further include for covering the second side
The card slot housing (4) in aperture on the outside of hole；
The sensor probe (3) is located on the inside of position-limiting drum (10).
5. according to claim 1 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that also wrap
Include tubular protection tail sleeve (9), the protection tail sleeve (9) in this detection device in use, installed with position-limiting drum (10) centering,
And protect the intermediate connector of tail sleeve (9) as position-limiting drum (10) and jack (8).
6. according to claim 5 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that also wrap
The cable retainer (7) for being fixed on position-limiting drum (10) or protecting on tail sleeve (9) is included, the cable retainer (7) is for constraining
Cable in this detection device.
7. according to claim 1 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that also wrap
Include the relative position for constraining position-limiting drum (10) and anchorage (13), for providing the jack of tractive force for steel strand wires (6)
(8)。
8. according to claim 1 a kind of based on reverse drawing method front end steel strand wires displacement detector, which is characterized in that described
Position-limiting drum (10) is used to the centre bore end hole section of one end of anchorage (13) phase separation be in countersunk, and position-limiting drum (10) is used
It is greater than the outer diameter of intermediate plate (1) in the centre bore end aperture of one end with anchorage (13) phase separation.
9. one kind as claimed in any of claims 1 to 8 is based on reverse drawing method front end steel strand wires displacement detector,
It is characterized in that, further includes being mounted on position-limiting drum (10) to be used for and the deck limiter (2) on one end of anchorage (13) phase separation, institute
It is along intermediate plate (1) that deck limiter (2), which are stated, for limiting the direction that steel strand wires (6) are drawn out, the direction being drawn out
Axis direction.
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