CN202627328U - Hollow self-balancing prestress steel bar and prestress stretch-draw clamp - Google Patents
Hollow self-balancing prestress steel bar and prestress stretch-draw clamp Download PDFInfo
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- CN202627328U CN202627328U CN 201220088683 CN201220088683U CN202627328U CN 202627328 U CN202627328 U CN 202627328U CN 201220088683 CN201220088683 CN 201220088683 CN 201220088683 U CN201220088683 U CN 201220088683U CN 202627328 U CN202627328 U CN 202627328U
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Abstract
The utility model discloses a hollow self-balancing prestress steel bar, which comprises a hollow bar, a tail end pipe hole end socket, an inner strut counter-force bar, wedge-shaped clamping pieces and a locking sleeve nut, wherein the locking sleeve nut is fixed to the head of the hollow bar, and the tail end pipe hole end socket is fixed to the tail part of the hollow bar; one end of the locking sleeve nut is matched with the hollow bar, and the other end of the locking sleeve nut is provided with an inner cavity with a wedge-shaped conical surface; the inner strut counter-force bar is a section of bar body which is matched with the inner cavity of the hollow bar and penetrates through the inner cavity of the hollow bar in the longitudinal direction, the tail end of the inner strut counter-force bar is supported on the tail end pipe hole end socket, and the other end of the inner strut counter-force bar penetrates through the locking sleeve nut and the wedge-shaped clamping pieces; wedge surfaces of the wedge-shaped clamping pieces are matched with the wedge-shaped conical surface inside the locking sleeve nut; and wedge surface tips face the tail end pipe hole end socket which is far away from the hollow bar. The hollow self-balancing prestress steel bar is provided with a special prestress stretch-draw clamp, so that after prestress stretching and drawing and locking are completed, prestress can be stored, and the prestress steel bar can be moved and installed in different places. By the prestress stretch-draw clamp, the using range of the prestress is broadened, and the effect is reliable, so that the prestress stretch-draw clamp is suitable for different projects.
Description
Technical field
The utility model relates to a kind of prestress steel bar device and prestress tension clamp; Especially relate to a kind of prestress tension clamp that has hollow self-balance prestress rod iron and be exclusively used in this prestressed steel bar of stretch-draw, be applied to the concrete structure reinforcement in the civil engineering structure, the ground anchorage in the ground stratum etc.
Background technology
Existing more than 50 year history appears in prestressing technique, is a kind of technology that occurs in reinforced-concrete especially reinforced concrete technology development back.Ordinary reinforced concrete structure; Mainly utilize reinforcing bar tensile strength height to remedy the not enough characteristics of concrete resistance to tension; Improved the whole tension of concrete structure, the ability of bending, cut, pressing, made the spans such as beam, plate of concrete structure bigger, post, stake equivalent-load power are bigger.But cracking appears in bottoms such as normal concrete beams easily and the distortion amount of deflection is big, and it is not enough that span and bearing capacity and durability aspect are occurred, and the scope of application is restricted.Prestressing technique occurs, and it is not enough to have changed ordinary reinforced concrete, and the scope of application is greatly expanded.Drawn main force's reinforcing bar to replace in the concrete structure with presstressed reinforcing steel; Through presstressed reinforcing steel is applied prestressing force; Again power is delivered in the concrete that is passed, makes concrete compression remedy the concrete tensile strength deficiency, improve splitting resistance; It is bigger to make member such as beam slab lighter span such as do, and improves durability.
Prestressing force is by applying two kinds of prestressed means branch pre-tensioning system and post stretching.Pre-tensioning system is a first prestressed muscle on the prefabricated platform of a concrete component precasting yard, and stretch-draw prestressing force.Cope match-plate pattern pouring concrete again discharges prestressing force and the prestressing force of reinforcing bar is delivered to form prestressed member on the concrete when treating that concrete is fixed and reaching predetermined strength.Building construction precast concrete floor in one's early years uses the method prefabricated usually.The characteristics of pre-tensioning system are, operation is few and simple, but prestressing force is straight muscle, is not curve, is generally small members.Can be rod iron or steel wire.
Post stretching is in concrete component, to reserve earlier prestress pipe, treat concreting and fixed after when reaching predetermined strength, penetrate presstressed reinforcing steel and stretch-draw again, prestressing force is locked on the concrete component power is delivered in the member.Being characterized in can straight line and curve muscle, can steel strand and rod iron, and scope is wide.Large-scale, complicated structure adopts post stretching basically, and shortcoming is that working procedure is many.
Prestressed reinforcement has high tensile steel wire, high strength steel strand and high-strength steel bar.
High tensile steel wire and high strength steel strand, the about 3.5mm of monofilament general diameter, with carbon steel garden wire rod repeatedly cold-drawn form, ultimate tensile strength has reached 1860MPa, is widely used in prestressed concrete member, the geotechnical engineering anchoring, also is used in some cables.High strength steel strand see usually 7 steel wire coileds one.
High-strength steel bar mainly contains solid finish rolling screw thread high tensile reinforcement and round steel bar, processes with alloy steel, and finish rolling forms.Market intensity can reach 930Mpa or higher.Main presstressed reinforcing steel at prestress concrete girder slab, rock soil anchor etc.
Prestress wire is low because of the material elongation per unit length, and the prestressed stretch-draw distortion is little, and when too short, little retraction is prone to prestressed failure, is difficult for storage prestressing force.So do the general length of presstressed reinforcing steel more than 10m.
Finish rolling screw thread high tensile reinforcement during stretch-draw, also is prone to produce the problems referred to above at the scene.The general length of presstressed reinforcing steel is more than 4m.
In sum, prestressing technique needs two aspects to improve at present: the one, solve short section member prestressing force problem, and steel strand are not suitable for prestressing force less than 10m, rod iron less than 4m as previously mentioned.The 2nd, presstressed reinforcing steel all can not move after applying prestressing force.Need stride footpath direction longitudinal prestressing like large-scale girder construction, also need laterally and vertical prestressing, about deck-molding 4m or following some position also needs prestressing force and situation such as on-the-spot prestressing force condition is limited; The reinforcing of old structure thing needs prestressing force but the scene executes that to make prestressing force difficult or the like.For this reason, need new device and stretch-draw instrument to realize improving.
Summary of the invention
The utility model provides a kind of hollow self-balance prestress bar device, and this device can be stored prestressing force after accomplishing prestressed stretch-draw and locking, and can move to move with the strange land and install; This device can discharge prestressing force after being installed in and waiting to solidify in the concrete of newly building, and forms prestressed concrete; Perhaps, this device is installed in the boring on ground stratum or can discharges prestressing force after fixing in the hole of existing structure body, forms geotechnical body or old structure body that prestressing force is strengthened.
The utility model also provides a kind of prestress tension clamp that is exclusively used in stretch-draw hollow self-balance prestress bar device, and these anchor clamps conveniently carry out prestressed stretch-draw and locking, have widened the prestressing force scope of application, and are reliable for effect, adapts to different requirement of engineering.
A kind of hollow self-balance prestress rod iron comprises hollow stick, terminal pore end socket, interior support counter-force rod, wedge shape intermediate plate and locking bushing nut;
Described hollow stick is one section hollow tube, and the head termination is fixed with the locking bushing nut, and the afterbody termination is fixed with terminal pore end socket;
Described locking bushing nut one end inner chamber has screw thread, cooperates with described hollow stick, and the other end has the inner chamber of the wedge shape conical surface, holds the wedge shape intermediate plate;
Support counter-force rod is one section body of rod that cooperates with the inner chamber of said hollow stick in described, and an end is supported on the terminal pore end socket, and the other end passes in described locking bushing nut and wedge shape intermediate plate;
The wedge shape cone match that the wedge surface of described wedge shape intermediate plate and locking bushing nut are inner, its wedge surface tip are towards the terminal pore end socket direction away from hollow stick, in order to support counter-force rod in locking.
The locking bushing nut be that external surface has quadrangle, hexagonal nut, be convenient to install.
Described locking bushing nut comprises outer sleeve nut and attaching nut, and described attaching nut has internal and external threads, is located in the end inner chamber of outer sleeve nut and threaded engagement, and described attaching nut's internal thread cooperates with the threaded one end of hollow stick.
The inner chamber of the outer sleeve nut of described locking bushing nut is provided with the anchor clamps cover, and described anchor clamps cover is cylinder, and inner chamber has the wedge shape conical surface that cooperates with the wedge surface of wedge shape intermediate plate.
Described terminal pore end socket be the outer plug that is connected with the hollow stick external screw thread, with the combination of the fixing interior plug of hollow stick internal thread or interior plug with outer plug.
On the body of rod between head locking bushing nut and the tail end pore end socket, have several anchoring nuts on the described hollow stick, can for: the head in hollow stick has the anchoring nut in the inboard of locking bushing nut; Perhaps the afterbody of described hollow stick has the anchoring nut in the inboard of pore end socket endways; Perhaps the head of described hollow stick and afterbody all have the anchoring nut.
Described wedge shape intermediate plate is made up of two or three intermediate plates, and external surface is a taper seat, and inner surface has groove.
Be provided with packing ring between described hollow stick head end and wedge shape intermediate plate.
Support counter-force rod is one section elongated body of rod or is made up of segment length's body of rod and one section quarter butt body in described.Be provided with an annular centering orienting cover between described stock body and the quarter butt body, described annular centering orienting cover is one section straight pipe, is provided with partition in the tube cavity, and the tube cavity of described partition both sides matches with the quarter butt body with the stock body respectively.
Described hollow stick external surface can be light face shape, and is all exasperate shapes of the adhesion stress of other raisings and concrete or slip casting anchoring body, comprises flank or with ribbing shape etc.
The prestressing method of the utility model device comprises prestressed stretch-draw, locking and release, can carry out stretch-draw through the prestress tension clamp of special use.
A kind of prestress tension clamp comprises support, slip card, cam, and described support is a straight-run of pipe, and described cam is movably installed in an end of support; Tube wall is provided with the hoop perforate of at least two symmetries, and hoop perforate and rack bore communicate with each other; At least two slip cards that match radially are located in the described hoop perforate, are installed with sliding pin on the slip card, and the head of sliding pin snaps in the sliding tray of being located at radial arrangement on the said cam, and sliding pin can be along its slip in sliding tray.
Described slip card one end has the circular arc bayonet socket, and both sides have slide rail, the circular arc bayonet socket of described at least two the slip cards formation round mouth of working in coordination; The chute of the hoop perforate inwall on described slide rail and the described support matches, and makes the slip card do radially folding along described hoop perforate and slides and can not vertically move along support.
Described cam is placed on the support, and the outside is provided with retainer ring, cam can be rotated along support tube wall hoop but can not vertically move along support.
Further, described sliding tray is a circular arc, and an end starting point of every sliding tray is near the interior bore edges of cam, and terminal point is near the external diameter edge of cam.
One end of the support of the prestress tension clamp of the utility model is connected with jack, and the other end is installed the cam rotatable and folding of drive slip card.When the positive inhour of described cam is rotated, along described one group of positive and negative slip of sliding tray, drive described one group of slip card and move as relative direction through described one group of sliding pin; Produce opening and closing movement, the round mouth that the bayonet socket of described one group of slip card is formed can become big or diminish, the bayonet socket big or small folding of ability of slip card and to block the hollow self-balance prestress of the stretch-draw of wanting excellent; Realize prestressed stretch-draw and locking, hollow self-balance prestress bar device can store prestressing force; Can carry, move and the strange land installation; Be installed in the concrete bodies of newly building, geotechnical body or existing structure body the hole in, fixing back discharges prestressing force, forms prestressed structure.
The utility model device and anchor clamps are easily manufactured, and are reliable for effect, adapt to different requirement of engineering.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of a kind of embodiment of the utility model.
Fig. 2 is the cross-section illustration intention of the A-A position of Fig. 1.
Fig. 3 is the cross-section illustration intention of the B-B position of Fig. 1.
Fig. 4 is the structure cross-sectional schematic of second kind of embodiment of locking bushing nut of the utility model.
Fig. 5 is the structure cross-sectional schematic of the third embodiment of locking bushing nut of the utility model.
Fig. 6 is second kind of embodiment sketch map that the interior support counter-force rod of the utility model is implemented
Fig. 7 is the structural representation of second kind of embodiment of terminal pore end socket of the utility model.
Fig. 8 is the structural representation of terminal the third embodiment of pore end socket of the utility model.
Fig. 9 is a kind of embodiment organigram of the Wedge gripping of the utility model.
Figure 10 is a kind of application example (erection stage) sketch map of the utility model in the cast-in-situ concrete member.
Figure 11 is a kind of application example (operational phase) sketch map of the utility model in the cast-in-situ concrete member.
Figure 12 is a kind of application example (erection stage) sketch map of the utility model in ground anchorage or existing structure thing.
Figure 13 is a kind of application example (operational phase) sketch map of the utility model in ground anchorage or existing structure thing.
Figure 14 is the structural representation of the utility model prestress tension clamp.
Figure 15 is that each parts assembled shaft of the utility model prestress tension clamp is surveyed the expansion sketch map.
Figure 16 is that the relation of the utility model device and prestress tension clamp, jack is launched sketch map.
The specific embodiment
As shown in Figure 1, a kind of hollow self-balance prestress rod iron stores prestressing force, be installed in the concrete bodies of newly building, geotechnical body or existing structure body the hole in, fixing back discharges prestressing force, forms prestressed structure.During storage prestressing force, comprise hollow stick 1, terminal pore end socket 2, interior support counter-force rod 3, wedge shape intermediate plate 4 and locking bushing nut 5; After discharging prestressing force, comprise hollow stick 1, terminal pore end socket 2.
Locking bushing nut 5 is one section straight pipe, and an end inner chamber has screw thread, cooperates with described hollow stick 1, and its other end has the inner chamber of the wedge shape conical surface, holds wedge shape intermediate plate 4, in order to support counter-force rod 3 in locking.
Its end support is endways on the pore end socket 2, and the other end passes in described locking bushing nut 5 and wedge shape intermediate plate 4, and through 4 lockings of wedge shape intermediate plate.
The wedge surface of wedge shape intermediate plate 4 cooperates with the interior wedge surface of locking bushing nut 5, and its wedge surface tip is towards away from hollow stick 1 direction.
Locking bushing nut 5 is four jiaos, hexagonal nut for its external surface, perhaps when locking bushing nut 5 length are longer, wherein processes four jiaos, hexagon for one section.As preferred locking bushing nut 5 external surfaces is that hexagon is as shown in Figure 2.Fig. 4 is the structure cross-sectional schematic of 5 second kinds of embodiments of described locking bushing nut.As shown in Figure 4, locking bushing nut 5 is made up of outer sleeve nut 51 and 52 liang of parts of attaching nut.Said locking bushing nut 5 inner chambers pack into attaching nut 52 and wedge shape intermediate plate 4, its position relation is installed attaching nut 52 again for wedge shape intermediate plate 4 is installed earlier.Described outer sleeve nut 51 is one section straight pipe, and its external surface shape is ditto said, and its inner chamber one end has the internal thread that cooperates with attaching nut 52, and its other end inner chamber has the wedge shape conical surface that cooperates with the wedge surface of wedge shape intermediate plate 4, holds wedge shape intermediate plate 4.Described this attaching nut 52 is the straight-through nut of endoporus, and it has internal and external threads.Described this attaching nut 52 is installed in the end inner chamber of outer sleeve nut 51 and threaded engagement, and the termination threaded engagement of its internal thread and hollow stick 1.
Fig. 5 is the structure cross-sectional schematic of said locking bushing nut 5 the third embodiments.As shown in the figure, locking bushing nut 5 is by outer sleeve nut 51, attaching nut 52, and anchor clamps overlap 53 3 parts and form.The said locking bushing nut 5 inner chambers attaching nut 52 that packs into, anchor clamps cover 53 and wedge shape intermediate plate 4, its position relation is installed attaching nut 52 again for after the anchor clamps that wedge shape intermediate plate 4 will be housed earlier overlap 53 installation in position.Described outer sleeve nut 51 is one section straight pipe, and its external surface shape is ditto said, and its inner chamber one end has the internal thread that cooperates with attaching nut 52, and its other end has the inner chamber that cooperates with anchor clamps cover 53; Described this attaching nut 52 is the straight-through nut of endoporus, and it has internal and external threads.Described this attaching nut 52 is installed in the end inner chamber of outer sleeve nut 51 and threaded engagement, and the termination threaded engagement of its internal thread and hollow stick 1; Described anchor clamps cover 53 is an end cylinder, and its inner chamber has the wedge shape conical surface that cooperates with the wedge surface of wedge shape intermediate plate 4, holds wedge shape intermediate plate 4.
In case of necessity, wedge shape intermediate plate 4 end positions in the locking bushing nut are provided with ring washer 6, are beneficial to wedge shape intermediate plate 4 and contact with hollow stick 1 head end.
As shown in Figure 5, as preferred version, interior support counter-force rod 3 is made up of segment length's body of rod 31 and one section quarter butt body 32, described grow section bar 31 length and hollow stick 1 approaching.Too small like support counter-force rod 3 external diameters in described, after inserting hollow stick 1 inner chamber during between the two excesssive gap, need between stock body 31 and quarter butt body 32, to be connected and insert an annular centering orienting cover 33, as shown in Figure 6.Described annular centering orienting cover 33 is one section straight pipe, has in the middle of its tube cavity and cuts off and not straight-through, and its tube cavity and interior support counter-force rod (31,32) size match.
The function of terminal pore end socket 2 be thrust function and the transmission power of internally support counter-force excellent 3 to the effect of hollow stick 1, also to play enhance protection effect, so enough rigidity, hardness and toughness will be arranged to hollow stick 1 afterbody.Its specific embodiment just like Fig. 1 be the outer plug nut that is connected with hollow stick 1 external screw thread, like Fig. 7, shown in Figure 8, for the interior plug that is connected with its internal thread and weld (2b, 2c).Perhaps as preferred version, terminal pore end socket 2 be interior plug with the combination use of outer plug (2,2a, 2c).
The described wedge shape intermediate plate 4 of the utility model device is made up of two or three intermediate plates, and its external surface is a taper seat, and its endoporus has groove 41; Preferred version is the straight taper seat of external surface.
Different according to the use occasion of the utility model device, the two ends of described hollow stick 1 have usually auxiliary nut (7,7a).As in the ground stratum as the rock soil anchor time spent, have anchoring nut 7 at described hollow stick 1 head in the inboard of locking bushing nut 5, also have backing plate 15 in case of necessity, like Figure 11, shown in Figure 12; Perhaps as being raising Stress Transfer performance and anchoring effect, the afterbody of described hollow stick 1 inboard of pore end socket 2 endways has anchoring nut 7a; When in new form concrete, inserting the utility model device, the head of described hollow stick 1 and afterbody all have usually the anchoring nut (7,7a).
During practical implementation, for improving anchoring effect, one or more anchoring nuts are established in arbitrary position, the middle part of described hollow stick 1 sometimes.
Figure 10, Figure 11 are a kind of application example sketch map of the utility model in the cast-in-situ concrete member.Shown in figure 10 is the erection stage situation, is placed in the concrete of newly building 200, during installation storing prestressed the utility model device; Locking bushing nut 5 one ends place template 201 outsides; Isolate with concrete so that discharge prestressing force, during if any anchoring nut 7 also outside template 201.The concrete of building is fixed, form removal and arrive predetermined strength after; With spanner locking bushing nut 5 is unloaded from hollow stick 1 together with wedge shape intermediate plate 4 grades; Completion is discharged into prestressing force in the concrete 200, makes concrete 200 bear the pressure shown in arrow 205, becomes prestressed concrete.With concrete 202 hollow stick 1 exposed parts is sealed again and get final product, shown in figure 11.
Figure 12, Figure 13 are a kind of application example sketch map of the utility model in ground anchorage or existing structure thing.Shown in figure 12, be the erection stage situation, insert in the petrosal foramen 303 on ground stratum 300 storing prestressed the utility model device.During installation, locking bushing nut 5 one ends place petrosal foramen 303 outsides so that discharge prestressing force, during if any anchoring nut 7 or pallet 15 also outside petrosal foramen.There is anchoring body 302 that the utility model and petrosal foramen are consolidated into one in the petrosal foramen 303.After anchoring body 302 reaches predetermined strength, locking bushing nut 5 is unloaded from hollow stick 1 together with wedge shape intermediate plate 4 grades, accomplish that prestressing force is discharged in the ground stratum 300, make the stratum bear the pressure shown in arrow 305 with spanner, shown in figure 11.At this moment, the utility model device is anchor pole in fact, works to do strengthening stratum or reinforces the existing structure thing.Can be grouting reinforcement or the anchoring of anchor pole powder stick by known technology anchoring body 302.
After forming the prestressed structure body, described in support counter-force rod 3 can extract out also can with insert in the hollow stick 1.As support counter-force rod 3 in extracting out, need in the inner chamber of hollow stick 1 cementitious materials such as cement paste to fill fixed; As support counter-force rod 3 in not extracting out, need in advance to inject anti-corrosion materials such as resin, butter at the inner chamber of hollow stick 1, make that there is the anti-corrosion material filling in the space between hollow stick 1 and the interior support counter-force rod 3.
The prestressing method of the utility model device comprises prestressed stretch-draw, locking and release, can carry out stretch-draw through the prestress tension clamp 8 of special use.
Like Figure 14, shown in 15, a kind of prestress tension clamp 8 is made up of support 801, slip card 802, cam 803, sliding pin 804 and retainer ring 805.
One group of size two same slip card 802 1 end has circular arc bayonet socket 820, and both sides have the circular arc bayonet socket 820 of 821, two slip cards 802 of slide rail works in coordination, and closes up the back and forms round mouth; The chute 813 of hoop perforate 810 inwalls on the slide rail 821 of slip card 802 and the support 801 matches; Slip card 802 relatively is installed in one group of hoop perforate 810 of described support 801; And be close to cam 803; Be installed with corresponding one group of two sliding pin 804 on the slip card 802; Have 830, one groups of sliding pins 804 of circular arc sliding tray of one group to snap on the cam 803 on the cam 803 and can slide along it in corresponding one group of circular arc sliding tray 830, slip card 802 can slide and can not vertically move along support along the folding of radially doing of described hoop perforates 810.
Circular arc sliding tray 830, its end starting point of every is near cam endoporus 831 edges.Terminal point is near the external diameter edge of cam, increasing the slip amplitude, and then increases the folding amplitude of bayonet socket 802.Described circular arc sliding tray 830 hoop on described cam 803 is evenly arranged.
Figure 16 is that the relation of the utility model device and prestress tension clamp, jack is launched sketch map.The prestressed stretch-draw of the utility model device and locking tool comprise jack 9 and special-purpose prestress tension clamp 8.The prestressing force releasing tool is conventional and locking bushing nut nut engaged spanner (not having diagram).
1) stretch-draw: on the platform of an installation jack 9 and prestress tension clamp 8; Each parts installation in position with hollow self-balance prestress rod; Penetrate from prestress tension clamp 8 at its end that locking bushing nut 5 is housed, end face of support counter-force rod 3 contacts with oil cylinder 91 end faces of jack 9 in it.Described prestress tension clamp 8 has one group of big or small folding slip card 802 of ability, and circular arc bayonet socket 820 is arranged on it, and bayonet socket 820 blocked hollow stick 1 when it closed.
When starting jack 9 work, oil cylinder 91 is pressed arrow 100 directions and is moved, and supports counter-force rod 3 pressurizeds in the promotion, in hollow stick 1, makes the pulling force (direction of arrow 101,102) of hollow stick 3 generations and interior support counter-force rod 3 equivalences through terminal pore end socket 2 counter-forces.When stretch-draw reached the predetermined pre-tensioning force value, stretch-draw was accomplished.
2) locking: jack 9 reverse operations, oil cylinder 91 retractions.The interior support of wedge shape intermediate plate 4 lockings this moment counter-force rod 3 prevents retraction, and its prestressing force locking also is stored in this utility model device: formation hollow stick 1, locking bushing nut 5 are the self equilibrium systems of pressure for pulling force, interior support counter-force rod 3.
3) discharge: will store prestressed hollow self-balance prestress bar device and be installed in structure (200; 300) in, after said device is reached predetermined strength by fixed or fixing (200,302); Sleeve nut 5 unlocks; Its prestressing force (205,305) is released in and forms prestressed structure in the structure (200,300).
Claims (11)
1. a hollow self-balance prestress rod iron is characterized in that: comprise hollow stick (1), terminal pore end socket (2), interior support counter-force rod (3), wedge shape intermediate plate (4) and locking bushing nut (5);
Described hollow stick (1) is one section hollow tube, and the head termination is fixed with locking bushing nut (5), and the afterbody termination is fixed with terminal pore end socket (2);
Described locking bushing nut (5) one end inner chambers have screw thread, cooperate with described hollow stick (1), and the other end has the inner chamber of the wedge shape conical surface, holds wedge shape intermediate plate (4);
Support counter-force rod (3) is one section body of rod that cooperates with the inner chamber of said hollow stick (1) in described, and an end is supported on the terminal pore end socket (2), and the other end passes in described locking bushing nut (5) and wedge shape intermediate plate (4);
The wedge shape cone match that the wedge surface of described wedge shape intermediate plate (4) and locking bushing nut (5) are inner, its wedge surface tip is towards terminal pore end socket (2) direction away from hollow stick (1).
2. hollow self-balance prestress rod iron according to claim 1; It is characterized in that: described locking bushing nut (5) comprises outer sleeve nut (51) and attaching nut (52); Described attaching nut (52) has internal and external threads; Be located in the end inner chamber of outer sleeve nut (51) and threaded engagement, described attaching nut's (52) internal thread cooperates with the threaded one end of hollow stick (1).
3. hollow self-balance prestress rod iron according to claim 1 and 2; It is characterized in that: the inner chamber of the outer sleeve nut (51) of described locking bushing nut (5) is provided with anchor clamps cover (53); Described anchor clamps cover (53) is a cylinder, and inner chamber has the wedge shape conical surface that cooperates with the wedge surface of wedge shape intermediate plate (4).
4. hollow self-balance prestress rod iron according to claim 1 is characterized in that: described terminal pore end socket (2) for the outer plug that is connected with hollow stick (1) external screw thread, with the fixing interior plug of hollow stick (1) internal thread or the combination of interior plug and outer plug.
5. hollow self-balance prestress rod iron according to claim 1 is characterized in that: have several anchoring nuts (7) on the body of rod between described hollow stick (1) head portion locking bushing nut (5) and the tail end pore end socket (2).
6. hollow self-balance prestress rod iron according to claim 1 is characterized in that: for forming, external surface is a taper seat to described wedge shape intermediate plate (4) by two or three intermediate plates, and inner surface has groove (41).
7. hollow self-balance prestress rod iron according to claim 1 is characterized in that: support counter-force rod (3) is one section elongated body of rod or is made up of segment length's body of rod (31) and one section quarter butt body (32) in described.
8. hollow self-balance prestress rod iron according to claim 7; It is characterized in that: be provided with an annular centering orienting cover (33) between described stock body (31) and the quarter butt body (32); Described annular centering orienting cover (33) is one section straight pipe; Be provided with partition (34) in the tube cavity, the tube cavity of described partition (34) both sides matches with quarter butt body (32) with stock body (31) respectively.
9. prestress tension clamp that is exclusively used in the described hollow self-balance prestress of the arbitrary claim of stretch-draw claim 1-8 rod iron; It is characterized in that: comprise support (801), slip card (802), cam (803); Described support (801) is a straight-run of pipe, and described cam (803) is movably installed in an end of support (801); Tube wall is provided with the hoop perforate (810) of at least two symmetries; At least two slip cards (802) that match radially are located in the described hoop perforate (810); Be installed with sliding pin (804) on the slip card (802), the head of sliding pin (804) snaps in the sliding tray (830) of being located at the last radial arrangement of said cam (803).
10. prestress tension clamp according to claim 9; It is characterized in that; Described slip card (802) one ends have circular arc bayonet socket (820), and both sides have slide rail (821), and the circular arc bayonet socket (820) of described at least two slip cards (802) is worked in coordination; The chute (813) of hoop perforate (810) inwall on described slide rail (821) and the described support (801) matches.
11. according to claim 9 or 10 described prestress tension clamps; It is characterized in that; Described sliding tray (830) is a circular arc, and an end starting point of every sliding tray (830) is near the interior bore edges of cam (803), and terminal point is near the external diameter edge of cam (803).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220088683 CN202627328U (en) | 2012-03-09 | 2012-03-09 | Hollow self-balancing prestress steel bar and prestress stretch-draw clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220088683 CN202627328U (en) | 2012-03-09 | 2012-03-09 | Hollow self-balancing prestress steel bar and prestress stretch-draw clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202627328U true CN202627328U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220088683 Expired - Lifetime CN202627328U (en) | 2012-03-09 | 2012-03-09 | Hollow self-balancing prestress steel bar and prestress stretch-draw clamp |
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| Country | Link |
|---|---|
| CN (1) | CN202627328U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587582A (en) * | 2012-03-09 | 2012-07-18 | 杭州图强工程材料有限公司 | Hollow self-balance pre-stress steel bar and pre-stress tensioning clamp |
| CN103101007A (en) * | 2013-02-18 | 2013-05-15 | 成都九鼎科技(集团)有限公司 | Damper indicator diagram test fixture |
| CN103882807A (en) * | 2014-03-17 | 2014-06-25 | 中复碳芯电缆科技有限公司 | Carbon fiber cable connector for cable-stayed bridge and mounting method of carbon fiber cable connector |
| CN106890746A (en) * | 2017-02-16 | 2017-06-27 | 刘青建 | A kind of red copper tube outer surface spray painting clamping device |
-
2012
- 2012-03-09 CN CN 201220088683 patent/CN202627328U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587582A (en) * | 2012-03-09 | 2012-07-18 | 杭州图强工程材料有限公司 | Hollow self-balance pre-stress steel bar and pre-stress tensioning clamp |
| CN102587582B (en) * | 2012-03-09 | 2014-12-17 | 杭州图强工程材料有限公司 | Pre-stress tensioning clamp of hollow self-balance pre-stress steel bar |
| CN103101007A (en) * | 2013-02-18 | 2013-05-15 | 成都九鼎科技(集团)有限公司 | Damper indicator diagram test fixture |
| CN103101007B (en) * | 2013-02-18 | 2015-05-27 | 成都九鼎科技(集团)有限公司 | Damper indicator diagram test fixture |
| CN103882807A (en) * | 2014-03-17 | 2014-06-25 | 中复碳芯电缆科技有限公司 | Carbon fiber cable connector for cable-stayed bridge and mounting method of carbon fiber cable connector |
| CN103882807B (en) * | 2014-03-17 | 2015-11-18 | 中复碳芯电缆科技有限公司 | A kind of cable stayed bridge Carbon Fiber Cables connector and mounting method thereof |
| CN106890746A (en) * | 2017-02-16 | 2017-06-27 | 刘青建 | A kind of red copper tube outer surface spray painting clamping device |
| CN106890746B (en) * | 2017-02-16 | 2019-01-15 | 浙江瑞邦智能装备股份有限公司 | Clamping device is used in a kind of spray painting of red copper tube outer surface |
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Denomination of utility model: Hollow self-balance pre-stress steel bar and pre-stress tensioning clamp Effective date of registration: 20191104 Granted publication date: 20121226 Pledgee: Hangzhou High-tech Financing Guarantee Co., Ltd. Pledgor: Hangzhou Dodrive Engineering Materials Ltd. Registration number: Y2019330000165 |
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