CN208563999U - The reversed retention mechanism of intelligent tensioning presstressed reinforcing steel - Google Patents

Abstract

The utility model discloses a kind of reversed retention mechanism of intelligent tensioning presstressed reinforcing steel, including work anchor assemblies and reversed pressure plate, the work anchor assemblies include the work anchor ring matched and work collet, the reversed pressure plate includes compression boss, and the compression boss, which press the work collet, makes its clamping.Using the utility model has the beneficial effects that, compression boss dock blind hole cooperation with the compression on work anchor ring, by compression boss, actively press falls in the work collet compressed in docking blind hole, work anchor can be made to clamp presstressed reinforcing steel, to reduce the rebound of presstressed reinforcing steel, loss of prestress is reduced, so as to avoid possible excessive tensioning.

Description

The reversed retention mechanism of intelligent tensioning presstressed reinforcing steel

Technical field

The utility model relates to build and a kind of tool of field of bridge construction, and in particular to one kind is used for prestressed stretch-draw The reversed retention mechanism of intelligent tensioning presstressed reinforcing steel that system uses.

Background technique

Prestressing stretching technique is widely applied in building and bridge construction, can slow down concrete using pre-stress construction Crackle occur and extension process, prolong the service life.However, tensioning construction process wants material and construction technology It asks very high, is easier to the problem of loss of prestress occur.When loss of prestress typically occurs in traditional prestressing force load end, Since the retraction of pre- presstressed reinforcing steel just makes to fasten between fixture and anchor ring, lost so as to cause the prestressing force of load.At present To solve the problems, such as loss of prestress in work progress, the method for often requiring to use ultra stretching, even if the maximum of tensioning load Stress is greater than design prestressing force.However ultra stretching method does not often know stress loss amount, it cannot be guaranteed that final stress satisfaction is set Meter requires, and easily occurs breaking or damaging the situation of anchorage, and ultra stretching method is simultaneously unreliable.Therefore, prestressing force is still needed to be improved The design of the structure of anchorage and tensioning system, provides conveniently for tensioning construction.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of intelligent tensioning prestressing force that cooperation pressing device uses The reversed retention mechanism of muscle.

Technical solution is as follows:

A kind of reversed retention mechanism of intelligent tensioning presstressed reinforcing steel, it is critical that including work anchor assemblies and reversed compression Plate, the work anchor assemblies include the work anchor ring matched and work collet, and the reversed pressure plate includes compression boss, institute Stating the compression boss press work collet makes its clamping.Using the above design, it the advantage is that and actively pushed up by compression boss The work collet on corresponding work anchor is pressed, work anchor can be made actively to clamp presstressed reinforcing steel, to reduce returning for presstressed reinforcing steel Bullet reduces loss of prestress, so as to avoid possible excessive tensioning.

As optimal technical scheme, above-mentioned reversed pressure plate further includes pressure plate ontology, which includes backwards The pressure surface and mounting surface of setting, the pressure surface are equipped with the compression boss, are equipped at the compression boss center and answer in advance Power muscle perforation, the presstressed reinforcing steel perforation both ends be opened on respectively the compression boss end face and the mounting surface；The work It include backing plate face and pressure-bearing surface as anchor ring, the pressure-bearing surface is corresponding with the pressure surface of the pressure plate ontology, sets on the pressure-bearing surface There is compression docking blind hole corresponding with the compression boss, compression docking hole bottom, which is run through, work anchor hole, the work The work collet is equipped in anchor hole, one end of the work collet is fallen in the compression docking blind hole.It is designed using above, Advantage, which is to compress docking blind hole to provide for compression boss, allows bit space, and facilitating compression boss, actively press corresponds to filing appliance Set.

As optimal technical scheme, above-mentioned work anchor hole be it is round table-like, the work anchor hole internal diameter is biggish open at one end In in compression docking blind hole, the work anchor hole internal diameter is lesser open at one end in the backing plate face；The work collet With the round table-like outer wall being adapted with the work anchor hole inner wall, the filing appliance set is set in the work anchor hole, Stub end is fallen in the compression docking blind hole.Using the above design, round table-like work collet and work anchor hole the advantage is that It matches, plays the role of clamping presstressed reinforcing steel.

As optimal technical scheme, above-mentioned work collet center is equipped with presstressed reinforcing steel anchor hole, and the work collet is by least Two valve work clip sheet circumferential directions are assembled, the diameter of the stub end of the work collet be greater than the maximum inner diameter of the work anchor hole and Less than the internal diameter for compressing docking blind hole, the stub end of the work collet falls in the compression pair after stretching out the work anchor hole It connects in blind hole.Using the above design, it the advantage is that and realized using simple clip type filing appliance Analysis of Nested Design to presstressed reinforcing steel Clamping.

As optimal technical scheme, above-mentioned work anchor ring is equipped with N number of compression and docks blind hole, and N is positive integer, N number of The docking blind hole that compresses is uniformly distributed around the center circumferential direction of the work anchor ring, is distinguished at each compression docking blind hole Equipped with work anchor hole, the work collet is respectively equipped in all work anchor holes；It is N number of right that the reversed pressure plate is equipped with Answer the compression boss for compressing docking blind hole.Using the above design, it the advantage is that and synchronous more of progress is facilitated to answer in advance The tensioning of power muscle

As optimal technical scheme, positioning mechanism, the localization machine are equipped between above-mentioned work anchor assemblies and reversed pressure plate Structure includes the anchor ring locating rod on the pressure plate ontology and the location hole on the work anchor ring, and the anchor ring is fixed Position bar protrudes into the positioning hole and is matched therewith；The anchor ring locating rod is vertically installed in the pressure surface of the pressure plate ontology On, the location hole is set on the pressure-bearing surface of the work anchor ring, which is blind hole.Using the above design, advantage It is that positioning mechanism can be convenient for assembly.

As optimal technical scheme, above-mentioned pressure plate ontology is circular slab, the quantity of the anchor ring locating rod and location hole It is three, three anchor ring locating rods are uniformly distributed in the pressure surface of the reversed pressure plate according to circumferencial direction, described Anchor ring locating rod is enclosed on the outside of the compression boss, and three location holes respectively correspond the anchor ring locating rod and are distributed in institute On the pressure-bearing surface for stating work anchor ring.Using the above design, it the advantage is that reversed pressure plate stabilization approaches during facilitating press With press work clip sheet.

As optimal technical scheme, the pressure-bearing surface of above-mentioned work anchor ring is equipped with annular groove, which is disposed around Outside the compression docking blind hole.Using the above design, the outer rollover of the support tube on annular groove and jack the advantage is that While matching, the reliable installation of convenient bidirectional jack and work anchor ring.

As optimal technical scheme, the mounting surface edge of above-mentioned pressure plate ontology is equipped with the installation chamfering of annular.Use with Upper design the advantage is that the installation for facilitating reversed pressure plate and jack.

As optimal technical scheme, at least one phase magnet is equipped at the installation chamfering of above-mentioned pressure plate ontology, this is fixed The pressure plate ontology is set in the magnet of position.Using the above design, the advantage is that can assist reversed pressure plate and jack Between assembly.

The utility model has the advantages that using the utility model has the beneficial effects that compression boss with compress dock blind hole cooperate, pass through pressure Actively press falls in the work collet compressed in docking blind hole to tight boss, work anchor can be made to clamp presstressed reinforcing steel, to reduce The rebound of presstressed reinforcing steel reduces loss of prestress, so as to avoid possible excessive tensioning.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

The structural schematic diagram for the prestressing force pull system that Fig. 2 is applicable in by the utility model；

Fig. 3 is the structural schematic diagram of work anchor assemblies；

Fig. 4 is the structural schematic diagram of reversed pressure plate；

Fig. 5 is the structural schematic diagram of tool anchor assemblies；

Fig. 6 is the enlarged drawing in the portion m in Fig. 5.

Specific embodiment

Below with reference to embodiment and attached drawing, the utility model is described in further detail.

As shown in Figure 1, a kind of reversed retention mechanism of intelligent tensioning presstressed reinforcing steel, including work anchor assemblies a and reversed compression Plate b, the work anchor assemblies a include the work anchor ring a1 matched and work collet a2, the reversed pressure plate b include compressing Boss b2, the compression boss b2, which presses the work collet a2, makes its clamping.

In order to more clearly demonstrate the above-mentioned reversed retention mechanism of intelligent tensioning presstressed reinforcing steel, it is applicable in below with reference to it pre- Stress tension system is introduced:

As shown in Fig. 2, a kind of prestressing force intelligent tensioning system, including the anchor plate component set gradually along tensioning direction E, work anchor assemblies a, reversed pressure plate b, jack c and tool anchor assemblies d, the jack c are two-way jack comprising It is set on cylinder body c3, cylinder body c3 there are two pars contractilis, the telescopic direction of two pars contractilis is parallel to each other, and two described flexible The cylinder body c3 stretches out along the both ends of the presstressed reinforcing steel via hole respectively in portion, and two pars contractilis are respectively formed tensioning pars contractilis With press pars contractilis, the tool anchor assemblies d is installed on the tensioning pars contractilis, be equipped on the press pars contractilis described in Reversed pressure plate b.

The anchor plate component e is fixed in concrete substrate, and the anchor plate component e includes anchor plate e1, the first spiral shell Revolving stirrup e2 and the second tie hoop e4, the anchor plate e1 includes anchor plate ontology e11 and oviduct e12, the anchor plate Ontology e11 includes the loading end and abutment face backwards to setting, and the anchor plate ontology e11 is provided centrally with presstressed reinforcing steel through-hole, A circle anchor ring bayonet e6, the work anchor are equipped with around the presstressed reinforcing steel through-hole on the loading end of the anchor plate ontology e11 Ring a1 is fallen in the anchor ring bayonet e6.

The stub end of the oviduct e12 is connected on the abutment face of the anchor plate ontology e11, is easy to use, institute The oviduct e12 and anchor plate ontology e11 is stated to be integrally formed.The outer concentric locking collar of the oviduct e12 is equipped with first spiral Stirrup e2, microcephaly's end cap of the oviduct e12 are connected to bellows e5, and circumferential direction is set on the small head end outer wall of the oviduct e12 It is equipped with flange e3, the side the flange e3 is provided with the second tie hoop e4, which is located at described convex Edge e3 is far from the side anchor plate ontology e11, oppositely oriented, the institute of the first tie hoop e2 and the second tie hoop e4 It states the first tie hoop e2 to connect close to one end of the anchor plate ontology e11 with the anchor plate ontology e11 spot welding, described second Tie hoop e4 is connect close to one end of the flange e3 with flange e3 spot welding.Compared to traditional components, anchor pad in this programme The design of board group part e, which can enhance, clasps power to the concrete substrate below anchor plate, improves the mixed of the region of stress concentration Solidifying soil intensity, so that the tensioning for presstressed reinforcing steel provides strong support.

The work anchor assemblies a is resisted against on the loading end of the anchor plate ontology e11, as shown in figs. 1 and 3, the work Making anchor assemblies a includes being equipped with work anchor hole a4, the work on work anchor ring a1 and work collet a2, the work anchor ring a1 Collet a2 is matched with the work anchor hole a4；

The work anchor ring a1 includes backing plate face and pressure-bearing surface, and the backing plate face is described to hold against the anchor plate component e Pressure surface is inserted into the work anchor hole a4, the press from the pressure-bearing surface towards the reversed pressure plate b, the work collet a2 Pars contractilis pushes the reversed pressure plate b to press the work collet a2；

That match with work anchor assemblies a is the reversed pressure plate b.As shown in figure 4, the reversed pressure plate b includes Pressure plate ontology b1, pressure plate ontology b1 include the fitting surface and pressure surface backwards to setting, and the fitting surface is towards the work Having anchor assemblies d, the pressure surface is equipped with compression boss b2, presstressed reinforcing steel perforation b3 is equipped at the center the compression boss b2, The presstressed reinforcing steel perforation b3 both ends be opened on respectively the compression boss b2 end face and the fitting surface；

The pressure-bearing surface of the work anchor ring a1 is equipped with compression corresponding with the compression boss b2 and docks blind hole a3, should Docking blind hole a3 bottom hole is compressed through there is the work anchor hole a4, which is truncated cone-shaped, the work anchor hole a4 internal diameter Biggish open at one end in compression docking blind hole a3, the work anchor hole a4 internal diameter is lesser open at one end in the backing plate Face；

The outer wall of the work collet a2 is the truncated cone-shaped being adapted with the work anchor hole a4 inner wall, the work collet The center a2 is equipped with presstressed reinforcing steel anchor hole, and the work collet a2 is assembled by least two valve work clip sheet circumferential directions, the work Make the diameter of the stub end of collet a2 greater than the maximum inner diameter of the work anchor hole a4 and is less than the compression docking blind hole a3's Internal diameter, the stub end of the work collet a2 is fallen in the compression docking blind hole a3 after stretching out the work anchor hole a4, described Compression boss b2 presses the big end surface of the work collet a2.

For convenience of the cooperation between the reversed pressure plate b and work anchor ring a1, the reversed pressure plate b and work anchor ring It is equipped with positioning mechanism between a1, which includes the anchor ring locating rod b4 on the pressure plate ontology b1 and be set to institute The location hole a5, the anchor ring locating rod b4 stated on work anchor ring a1 is vertically installed in the pressure surface of the pressure plate ontology b1 On, the location hole a5 is set on the pressure-bearing surface of the work anchor ring a1, and location hole a5 is blind hole, the anchor ring locating rod B4 is protruded into the location hole a5 and is slidably matched with it.This design enables anchor ring locating rod that reversed pressure plate stabilization to be guided to support Close and press work clip sheet.

The tensioning of the two-way jack and press function are achieved in that on the cylinder body c3 of the two-way jack and pass through It is equipped with presstressed reinforcing steel via hole, two pars contractilis stretch out the cylinder body c3 along the both ends of the presstressed reinforcing steel via hole respectively, The presstressed reinforcing steel via hole is corresponded on two pars contractilis and is respectively equipped with presstressed reinforcing steel holding holes, is located at the tensioning pars contractilis On the presstressed reinforcing steel holding holes form anchor ring fixation hole c1, the tool anchor assemblies d is installed in anchor ring fixation hole c1, The presstressed reinforcing steel holding holes on the press pars contractilis form pressure plate fixation hole c2, the reversed pressure plate b peace Loaded in pressure plate fixation hole c2.

The cylinder body c3 includes the outer sleeve c5 that coaxial line is arranged and inner sleeve c6, the inner chamber bodily form of the inner sleeve c6 At the presstressed reinforcing steel via hole, cylindric grease chamber is formed between the outer sleeve c5 and inner sleeve c6, is set in the middle part of the grease chamber There is grease chamber isolation ring c3a, grease chamber isolation ring c3a is fixed with the inner wall of the outer wall of the inner sleeve c6 and outer sleeve c5 respectively to be connected It connects, which is divided into two plunger shaft c4 for the grease chamber, and two pars contractilis are respectively from the grease chamber Both ends are protruded into two plunger shaft c4, are sealed between the both ends of the grease chamber and corresponding pars contractilis, each piston Pump nozzle and oil return nozzle are respectively equipped on the corresponding outer sleeve c5 of chamber c4.

The pars contractilis includes annular piston c7 and retracting cylinder c8, and wherein annular piston c7 circumferential direction is set to the plunger shaft c4 Interior, the inner end of the retracting cylinder c8 is protruded into the plunger shaft c4 along the centerline direction of the cylinder body c3 and lives with the ring-type C7 connection is filled in, sealing element, the pump nozzle and oil return are equipped between the retracting cylinder c8 and the outer sleeve c5 and inner sleeve c6 Mouth is located at the two sides of the annular piston c7, and the internal cavity of the retracting cylinder c8 forms the presstressed reinforcing steel holding holes.

As shown in figure 5, the tool anchor assemblies d is used for the clamping of presstressed reinforcing steel, the tool anchor assemblies d includes moveable anchor Ring d1 and tool collet d2；The tool anchor ring d1 includes working face and mounting surface, and running through on the tool anchor ring d1 has tool Anchor hole d3, tool anchor hole d3 is in a circular table shape, and the tool anchor hole d3 internal diameter is biggish open at one end in the working face, the tool Anchor hole d3 internal diameter is lesser open at one end in the mounting surface；

The tool collet d2 is round table-like to be adapted with the inner wall of the tool anchor hole d3, and the tool collet d2 is set It is placed in tool anchor hole d3, is equipped in the tool collet d2 and is engaged with tool anchor hole d3 with the presstressed reinforcing steel of hole heart line Hole.

The d of tool anchor assemblies described in the present embodiment, which has been done, just wears formula design.Specifically, the tool collet d2 is by least two Valve tool clamping piece circumferential direction is assembled, and the stub end of the tool collet d2 is connected with intermediate plate lifting component, the tool collet The small head end of d2 is connected with intermediate plate return unit d5, is equipped with lifting operating parts between the intermediate plate lifting component and tool anchor ring d1.

As shown in fig. 6, it is equipped with intermediate plate guide chute d4 along its rotary table generatrix direction on the inner wall of the tool anchor hole d3, it should Intermediate plate guide chute d4 and the tool clamping piece correspond, and the opening of intermediate plate guide chute d4 inside contracts, and intermediate plate guiding is slided Sliding guide piece d41 is respectively equipped in slot d4, sliding guide piece d41 is connected with the corresponding tool clamping piece；

Specifically, the intermediate plate return unit d5 is dynamic clamping head and quiet clamping head, and it is multiple that the tool clamping piece is connected separately with the elasticity Position part, the dynamic clamping head and quiet clamping head are arranged along its length in the intermediate plate guide chute d4, one end of the dynamic clamping head and quiet clamping head It is connected with the inner wall of the intermediate plate guide chute d4, the other end of the dynamic clamping head and quiet clamping head is connected with the tool clamping piece, described The connecting pin of dynamic clamping head and quiet clamping head and the intermediate plate guide chute d4 inner wall is close to the mounting surface, the dynamic clamping head and quiet clamping head and tool The connecting pin of intermediate plate is far from the mounting surface.

The tool clamping piece is pulled to the major part extreme direction of the tool anchor hole d3, in the guidance of sliding guide piece d41 Under, each tool clamping piece is slided along rotary table generatrix direction, is helped to maintain the stability of tool clamping piece sliding, is avoided multiple folders Interference and dislocation between piece conveniently wear presstressed reinforcing steel to expand presstressed reinforcing steel keying aperture, after use, the folder Piece return unit d5 can assistance tool intermediate plate be returned in the tool anchor hole d3.

For convenience of the tool clamping piece is pulled, the intermediate plate lifting component includes intermediate plate lifting plate d6 and lifting connector D7, wherein intermediate plate lifting plate d6 is located at the working face side of the tool anchor ring d1, and the intermediate plate lifting plate d6 is equipped with and institute The corresponding presstressed reinforcing steel through hole d8 of tool anchor hole d3 is stated, the tool clamping piece is connected separately with the lifting connector d7, The both ends of the lifting connector d7 are connected with the tool clamping piece and intermediate plate lifting plate d6 respectively, the lifting connector D7 is also disposed in the intermediate plate guide chute d4, avoids occupying the space in the tool anchor hole d3.

Specifically, the lifting connector d7 and intermediate plate return unit d5 can be spring.

For convenience of operation, the lifting operating parts includes push-pull rod d9, and push-pull rod d9 lifts plate perpendicular to the intermediate plate D6, the one end the push-pull rod d9 are threadedly coupled with the tool anchor ring d1, and the other end activity of the push-pull rod d9 is pierced by described Intermediate plate lifts plate d6, and bulb d10 is equipped in the middle part of the push-pull rod d9, and the bulb d10 is located at intermediate plate lifting plate d6 Between the tool anchor ring d1, the working face is equipped with resigning breach d11 corresponding with the bulb d10.

As shown in Fig. 2, for convenience of the top of the tensioning pars contractilis of tool anchor assemblies and jack, reversed pressure plate and jack The assembly between pars contractilis and jack and work anchor ring is pressed, the present embodiment has following design:

Installation snap ring c10, the installation snap ring are equipped in the presstressed reinforcing steel holding holes of the outer end the retracting cylinder c8 The center line of c10 is overlapped with the center line of the retracting cylinder c8, and the outer end face of installation snap ring c10 is equipped with against chamfering；

The installation snap ring of the fitting surface of the pressure plate ontology b1 on the retracting cylinder c8 of the press pars contractilis The outer end face of c10, the fitting surface edge of the pressure plate ontology b1 is equipped with to fall with the annular assembly matched against chamfering Angle b5；

The installation snap ring c10 of the mounting surface of the tool anchor ring d1 on the retracting cylinder c8 of the tensioning pars contractilis Outer end face, the mounting surface edge of the tool anchor ring d1 is equipped with and the annular installation chamfering matched against chamfering；

At least one secondary phase magnet pair is equipped between the retracting cylinder c8 and pressure plate ontology b1 of the press pars contractilis, it is described At least one secondary phase magnet pair also is provided between the retracting cylinder c8 of tensioning pars contractilis and the tool anchor ring d1；

For the phase magnet to including master positioning magnet c11 and secondary phase magnet, the master positioning magnet is respectively arranged on institute On the chamfering inclined-plane against chamfering for stating installation snap ring c10；The pair phase magnet includes pressing plate pair phase magnet b6 and anchor ring In secondary phase magnet d12, the pressing plate pair phase magnet b6 at the annular assembly chamfer b5 of the pressure plate ontology b1, institute It states in anchor ring pair phase magnet d12 at the annular installation chamfering of the tool anchor ring d1；

The cylinder body c3 is provided with support tube c9 with center line, and the outer sleeve c5's of the press pars contractilis side is outer Edge is connect with the inside edge of support tube c9, and the outer ledge of support tube c9 is equipped with outside flange, the work anchor The pressure-bearing surface of ring a1 is equipped with the annular groove a6 matched with the flange, and annular groove a6 is disposed around the compression docking Outside blind hole a3；

The extension end end of the compression boss b2 and the anchor ring locating rod b4 are equipped with outer chamfer.

Since a prestressed girder needs while using more presstressed reinforcing steels, above-mentioned work anchor assemblies in engineering practice A and tool anchor assemblies d is porous anchor, and multiple compression boss b2 and pre- are correspondingly provided on the reversed pressure plate b Stress rib perforation b3.

Prestressing force pull system is installed as shown in Figure 2, and the tensioning pars contractilis work of the two-way jack c is opened Beginning tensioning, after reaching predetermined tensioning amount, the press pars contractilis of the jack is pushed described in the reversed pressure plate b press Work collet a2, and the work anchor assemblies a is made to clamp the presstressed reinforcing steel, so that presstressed reinforcing steel be avoided to spring back, reduces prestressing force Loss.

Finally, it should be noted that foregoing description is only the preferred embodiment of the utility model, the common skill of this field Art personnel are under the enlightenment of the utility model, under the premise of without prejudice to the utility model aims and claim, can make Multiple similar expressions, such transformation are each fallen within the protection scope of the utility model.

Claims (10)

1. a kind of reversed retention mechanism of intelligent tensioning presstressed reinforcing steel, it is characterised in that: including work anchor assemblies (a) and reversed compression Plate (b)；

The work anchor assemblies (a) include the work anchor ring (a1) matched and work collet (a2), the reversed pressure plate (b) Including compression boss (b2), the compression boss (b2), which press the work collet (a2), makes its clamping.

2. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 1, it is characterised in that: the reversed compression Plate (b) further includes pressure plate ontology (b1), which includes the pressure surface and mounting surface backwards to setting, described to apply Pressure surface is equipped with the compression boss (b2), and presstressed reinforcing steel perforation (b3) is equipped at compression boss (b2) center, this is pre- to answer Power muscle perforation (b3) both ends be opened on respectively the compression boss (b2) end face and the mounting surface；

The work anchor ring (a1) includes backing plate face and pressure-bearing surface, the pressure surface phase of the pressure-bearing surface and the pressure plate ontology (b1) Corresponding, which is equipped with compression corresponding with the compression boss (b2) docking blind hole (a3), which docks blind hole (a3) bottom hole is equipped with the work collet (a2), the work collet through there is work anchor hole (a4) in the work anchor hole (a4) (a2) one end is fallen in compression docking blind hole (a3).

3. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 2, it is characterised in that: the work anchor hole It (a4) is round table-like through-hole, work anchor hole (a4) internal diameter is biggish open at one end interior in compression docking blind hole (a3), Work anchor hole (a4) internal diameter is lesser open at one end in the backing plate face；

The work collet (a2) has the round table-like outer wall being adapted with work anchor hole (a4) inner wall, the work collet (a2) it is set in the work anchor hole (a4), stub end is fallen in compression docking blind hole (a3).

4. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 3, it is characterised in that: the work collet (a2) center is equipped with presstressed reinforcing steel anchor hole, and the work collet (a2) is assembled by least two valve work clip sheet circumferential directions, the work The diameter for making the stub end of collet (a2), which is greater than the maximum inner diameter of the work anchor hole (a4) and is less than the compression, docks blind hole (a3) internal diameter, the stub end of the work collet (a2) fall in the compression docking blind hole after stretching out the work anchor hole (a4) (a3) in.

5. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 4, it is characterised in that: the work anchor ring (a1) it is equipped with N number of compression docking blind hole (a3), N is positive integer, and N number of compression docking blind hole (a3) surrounds the work The center circumferential direction for making anchor ring (a1) is uniformly distributed, and is respectively equipped with work anchor hole (a4) at each compression docking blind hole (a3), The work collet (a2) is respectively equipped in all work anchor holes (a4)；The reversed pressure plate (b) is equipped with N number of correspondence The compression boss (b2) for compressing docking blind hole (a3).

6. according to any one of reversed retention mechanism of intelligent tensioning presstressed reinforcing steel of claim 2~5, it is characterised in that: Positioning mechanism is equipped between the work anchor assemblies (a) and reversed pressure plate (b), which includes being set to the pressure plate Anchor ring locating rod (b4) on ontology (b1) and the location hole (a5) on the work anchor ring (a1), the anchor ring locating rod (b4) it protrudes into the location hole (a5) and is matched therewith；

The anchor ring locating rod (b4) is vertically installed in the pressure surface of the pressure plate ontology (b1), and the location hole (a5) sets It is placed on the pressure-bearing surface of the work anchor ring (a1), which is blind hole.

7. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 6, it is characterised in that: the pressure plate sheet Body (b1) is circular slab, and the quantity of the anchor ring locating rod (b4) and location hole (a5) is three, and three anchor rings position Bar (b4) is uniformly distributed in the pressure surface of the reversed pressure plate (b) according to circumferencial direction, and the anchor ring locating rod (b4), which is enclosed, to be set On the outside of the compression boss (b2), three location holes (a5) respectively correspond the anchor ring locating rod (b4) be distributed in it is described It works on the pressure-bearing surface of anchor ring (a1).

8. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 7, it is characterised in that: the work anchor ring (a1) pressure-bearing surface is equipped with annular groove (a6), which is disposed around compression docking blind hole (a3) outside.

9. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 8, it is characterised in that: the pressure plate sheet The mounting surface edge of body (b1) is equipped with the installation chamfering (b5) of annular.

10. the reversed retention mechanism of intelligent tensioning presstressed reinforcing steel according to claim 9, it is characterised in that: the pressure plate It is equipped at least one phase magnet at the installation chamfering (b5) of ontology (b1), is set to the pressure plate ontology in the phase magnet (b1)。