CN110820585A - Vertical tensioning equipment for finish rolling of deformed steel structures - Google Patents

Vertical tensioning equipment for finish rolling of deformed steel structures Download PDF

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Publication number
CN110820585A
CN110820585A CN201911176528.3A CN201911176528A CN110820585A CN 110820585 A CN110820585 A CN 110820585A CN 201911176528 A CN201911176528 A CN 201911176528A CN 110820585 A CN110820585 A CN 110820585A
Authority
CN
China
Prior art keywords
concrete
fastening
tensioning
finish rolling
jack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911176528.3A
Other languages
Chinese (zh)
Inventor
王辉
张运福
郭小坤
赵嘉彪
王伟
郭朝鹏
赵元恩
陈晓宇
孙贵礼
张彦平
吕蒙
李璠
阚涛
李新燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Transport Development Group PLC
Original Assignee
Southwest Transport Development Group PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southwest Transport Development Group PLC filed Critical Southwest Transport Development Group PLC
Priority to CN201911176528.3A priority Critical patent/CN110820585A/en
Publication of CN110820585A publication Critical patent/CN110820585A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12Mounting of reinforcing inserts; Prestressing
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12Mounting of reinforcing inserts; Prestressing
    • E04G21/121Construction of stressing jacks

Abstract

The invention provides vertical tensioning equipment for finish rolling of a deformed steel bar, which relates to the technical field of tensioning equipment and comprises a movable support, a lifting device, a jack, an anchoring device and a tensioning fixed seat; the steel bar can be tensioned in a vertical prestress mode through the jack and the anchoring device, the tensioning fixing seat and the jack are driven to reciprocate through the lifting device, the movable support serves as an external support of the whole device, and the movable support can move relative to a concrete plane and can drive the whole device to move along the extending direction of a plurality of vertical finish rolling threaded steel structures; thereby progressively drive jack, anchor and stretch-draw fixing base through rising to rise device and movable support and carry out stretch-draw operation to a plurality of continuous finish rolling twisted steel, it is numerous to have alleviated the vertical finish rolling twisted steel structure prestressing force stretch-draw quantity that exists among the prior art, and staff work efficiency is low, and the technical problem that working strength is big has improved the efficiency of construction, is fit for using widely.

Description

Vertical tensioning equipment for finish rolling of deformed steel structures
Technical Field
The invention relates to the technical field of tensioning equipment, in particular to vertical tensioning equipment for finish rolling of a threaded steel structure.
Background
Along with the general use of bridge prestressed reinforcement, a large amount of finish rolling deformed bar constructs the vertical prestressing force construction that is used for the case roof beam, and vertical prestressing force mainly bears shear stress at bridge construction and operation state in-process, and vertical finish rolling deformed bar constructs the prestressing force and is not known according to the dozens of centimetres settings branch of vertical arrangement general condition at the case roof beam web, and double or single is not equal.
In the prior art, when the prestress of a plurality of continuous vertical finish-rolled thread steel structures is tensioned, the tension operation is carried out independently one by one; however, because the number of prestress tensioning of the vertical finish rolling deformed steel structure is large, the workload is very large, and the tensioning equipment needs to be repeatedly moved all the time when workers perform tensioning operation, so that the working efficiency is low, and the working strength of the workers is high.
Disclosure of Invention
The invention aims to provide vertical tensioning equipment for finish rolling deformed steel structures, which is used for relieving the technical problems of large number of vertical finish rolling deformed steel structures in the prior art, low working efficiency of workers and high working strength.
The embodiment of the invention is realized by the following steps:
the invention provides a vertical tensioning device for finish rolling of a deformed steel bar, which is used for performing vertical prestress tensioning on a steel bar in a groove of a concrete preformed hole and comprises: the device comprises a movable support, a lifting device, a jack, an anchoring device and a tensioning fixed seat;
the movable support is positioned on the concrete for fixing the steel bars and can move relative to the plane of the concrete, and the lifting device is connected with one end of the movable support, which is far away from the concrete;
the utility model discloses a concrete structure, including the tensioning fixing base, jack, anchor device, reinforcing bar, tensioning fixing base.
In a preferred embodiment of the present invention, the moving bracket includes a bracket body, an adjusting device, and a plurality of moving wheels;
the plurality of moving wheels are respectively arranged at one end of the bracket body close to the concrete, and any one of the moving wheels is connected with the bracket body through a bearing;
the adjusting device is located one end, close to the moving wheel, of the support body, the adjusting device is connected with the support body, and the adjusting device is used for driving the support body to ascend, so that the moving wheel and the concrete surface are spaced.
In a preferred embodiment of the present invention, the adjusting device comprises a supporting frame, a torsion spring and a connecting shaft;
the support frame is rotatably connected with the support body through the connecting shaft, the torsion spring is sleeved on one side of the connecting shaft, the torsion spring has an elastic tendency of enabling the support frame to be close to the support body, the height of the support frame is larger than the diameter of the moving wheel, and therefore when the support frame rotates to abut against concrete, the moving wheel is in a suspended position;
one side of the support frame is provided with a pedal support rod, and the pedal support rod is fixedly connected with the support frame.
In a preferred embodiment of the present invention, the number of the adjusting devices corresponds to the number of the moving wheels, so that one adjusting device is disposed at a connection position between any one of the moving wheels and the bracket body.
In a preferred embodiment of the present invention, the bracket body is provided with a reinforcing rib;
the moving wheels are universal wheels or Mecanum wheels.
In a preferred embodiment of the present invention, the hoisting device includes a base, a driving motor, a coupling, a spool and a lifting rope;
the base with the support body is kept away from the one end of concrete and is connected, driving motor set up in on the base, driving motor passes through the shaft coupling with the spool transmission is connected, the lifting rope is around locating the outside of spool, the lifting rope stretches out the one end of spool with stretch-draw fixing base is connected.
In a preferred embodiment of the present invention, the anchoring means comprises a first anchoring nut, a second anchoring nut, a first anchor backing plate and a second anchor backing plate;
the first anchor backing plate and the first anchor nut are sleeved at one end, close to the concrete, of the reinforcing steel bar, and the first anchor backing plate is located between the first anchor nut and the concrete; the second anchor backing plate with second anchor nut cover is located the reinforcing bar is close to the one end of jack, the second anchor backing plate with the jack is kept away from the one end butt of stretch-draw fixing base, second anchor nut be used for with the second anchor backing plate is close to in the jack.
In a preferred embodiment of the present invention, the tension fixing base includes a fixing base body and a plurality of legs;
a plurality of the supporting legs are arranged on one side of the fixing seat body, the jack is arranged on the other side of the fixing seat body, any one of the supporting legs is fixedly connected with the fixing seat body, and the fixing seat body is abutted against concrete through the supporting legs, so that a clearance space is formed between the fixing seat body and the concrete.
In the preferred embodiment of the invention, the device further comprises a fastening device;
the fastening device is sleeved outside the reinforcing steel bar and located in a gap space between the fixing seat body and the concrete, and the fastening device is clamped with the second anchoring nut.
In a preferred embodiment of the invention, the fastening means comprises a first fastening portion and a second fastening portion;
first fastening portion with second fastening portion integrated into one piece, just first fastening portion cover is located second anchor nut is outside, and with second anchor nut joint, second fastening portion is located first fastening portion is kept away from the one end of second anchor nut, the outside of second fastening portion is provided with the joint structure that is used for being connected with external spanner.
The embodiment of the invention has the beneficial effects that:
the invention provides a vertical tensioning device for finish rolling of a deformed steel bar, which is used for performing vertical prestress tensioning on a steel bar in a groove of a concrete preformed hole and comprises: the device comprises a movable support, a lifting device, a jack, an anchoring device and a tensioning fixed seat; the steel bar can be tensioned in a vertical prestress mode through the jack and the anchoring device, and the sunken part of the jack can be prevented through the tensioning fixing seat, so that the jack is convenient to position and install; furthermore, the tensioning fixing seat and the jack are driven to reciprocate to lift through the lifting device, the lifting device can drive the tensioning fixing seat to be arranged on the concrete, the jack and the tensioning fixing seat after tensioning operation can be lifted to be in the air through the lifting device, the movable support serves as an external support of the whole equipment, and the movable support can move relative to the plane of the concrete, so that the whole equipment can be driven to move along the extending direction of a plurality of vertical finish rolling deformed steel structures which are vertically arranged in any one row in a plurality of rows; thereby carry out stretch-draw operation to the finish rolling twisted steel through the jack, anchor and stretch-draw fixing base, and gradually drive the jack through rising to rise device and movable support after accomplishing stretch-draw operation, anchor and stretch-draw fixing base carry out stretch-draw operation to next finish rolling twisted steel, it is numerous that the vertical finish rolling twisted steel that exists can be alleviated to repeated above-mentioned process among the prior art constructs the prestressing force and draws quantity, staff work efficiency is low, the technical problem that working strength is big, construction efficiency is improved, and the method is suitable for being generalized to use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic overall structure diagram of a vertical tensioning device for finish rolling of a threaded steel structure according to an embodiment of the invention;
FIG. 2 is a front view of a vertical tensioning device for finish rolling threaded steel structures provided in an embodiment of the present invention;
FIG. 3 is a structural diagram with partial perspective of a vertical tensioning device for finish rolling threaded steel structures according to an embodiment of the present invention;
FIG. 4 is a partially enlarged view of a vertical tensioning device for finish rolling threaded steel structures according to an embodiment of the present invention.
Icon: 100-concrete; 200-reinforcing steel bars; 300-moving the support; 301-a stent body; 302-a moving wheel; 303-adjusting means; 313-a support frame; 323-torsion spring; 333-connecting shaft; 334-pedal support rod; 400-a hoisting device; 401-a base; 402-a drive motor; 403-spool; 404-a lifting rope; 405-a coupling; 500-jack; 600-an anchoring device; 601-a first anchor nut; 602-a first anchor backing plate; 603-a second anchor nut; 604-a second anchor pad; 700-tensioning a fixed seat; 701-a fixed seat body; 702-a leg; 800-fastening means.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
As shown in fig. 1 to 4, the vertical tensioning device for finish rolling deformed steel members according to the present embodiment is used for performing vertical prestress tensioning on a steel bar 200 located in a groove of a prepared hole of a concrete 100, and includes: the device comprises a movable support 300, a lifting device 400, a jack 500, an anchoring device 600 and a tension fixing seat 700; the movable support 300 is positioned on the concrete 100 for fixing the reinforcing steel bar 200, the movable support 300 can move relative to the plane of the concrete 100, and the lifting device 400 is connected with one end of the movable support 300 away from the concrete 100; the tensioning fixing seat 700 is located in the movable support 300, the lifting device 400 is connected with the tensioning fixing seat 700, the lifting device 400 is used for driving the tensioning fixing seat 700 to reciprocate, the lifting device 400 can drive the tensioning fixing seat 700 to be arranged on the concrete 100, the steel bar 200 penetrates through the tensioning fixing seat 700, the jack 500 is arranged on the tensioning fixing seat 700, the jack 500 can be clamped with the steel bar 200 through the anchoring device 600, the ejection direction of the jack 500 is consistent with the direction of the prestress required by the steel bar 200, and the jack 500 is used for performing vertical prestress tensioning on the steel bar 200.
It should be noted that, because the vertical tensioning equipment for finish rolling deformed steel members provided in this embodiment is used for performing vertical prestress tensioning on the steel bar 200 located in the groove of the prepared hole of the concrete 100, before construction, the groove of the prepared hole of the concrete 100 needs to be cleaned first, after the cleaning is completed, the first anchor backing plate 602 in the following anchoring device 600 may be placed in the groove along the direction of the steel bar 200, and the first anchor backing plate 602 is sleeved outside the steel bar 200 and connected with the external thread of the steel bar 200 by using the first anchoring nut 601; because the vertical finish-rolled twisted steel bars 200 are vertically arranged on the box girder web, each steel bar 200 is primarily anchored and fixed by the steps; and then the hoisting device 400, the jack 500, the anchoring device 600 and the tension fixing seat 700 are gradually moved to the position of each steel bar 200 by the movable bracket 300, and the vertical prestress tension operation is performed.
The moving manner of the moving frame 300 may be multiple groups, for example: the movable frame 300 may be moved by using a roller, or a slide rail may be provided on the surface of the concrete 100, and the movable frame 300 may be moved along the surface of the concrete 100 by using a sliding manner of the slide rail and the slide rail by providing the slide rail on the movable frame 300.
Optionally, the jack 500 used for the tensioning device of the steel bar 200 may be a hollow tensioning jack 500, or alternatively, a center-through jack 500 or a front-clamping jack 500 may be used, which will not be described herein again.
The anchoring device 600 and the tension fixing base 700 are used as a basic fixing device of the jack 500, the tension fixing base 700 is provided with a central hole through which the steel bar 200 passes, and the central hole of the tension fixing base 700 and the through hole of the jack 500 are coaxially arranged, so that when the steel bar 200 sequentially passes through the tension fixing base 700 and the jack 500, the acting force of the jack 500 cannot be deflected reversely, the anchor device 600 is connected with the steel bar 200 and then abutted against the jack 500, and the jack 500 performs prestress tension operation on the steel bar 200 by applying force to the anchor device 600.
In this embodiment, the hoisting device 400 may be provided with a plurality of types, for example: the hoisting device 400 can adopt a hydraulic cylinder, wherein the hydraulic cylinder can be connected with the tensioning fixing seat 700 by using an intermediate connecting part, and the tensioning fixing seat 700 is driven to reciprocate in the vertical direction by using the telescopic reciprocation of the hydraulic cylinder; for another example: the lifting device 400 can adopt a motor, wherein the motor converts the rotation of an output shaft of the motor into lifting in a linear direction by utilizing a steel wire rope and a plurality of pulley combinations; it should be noted that, in this embodiment, the lifting device 400 can lift the jack 500 and the tension fixing seat 700 which complete the prestress tension operation into the air, and then the moving bracket 300 drives the overall structure to move to the next steel bar 200 which needs to perform the prestress tension operation in the horizontal direction, and at this time, the lifting device 400 can drop the jack 500 and the tension fixing seat 700 to the corresponding steel bar 200, and after the lifting device 400 completely drops the tension fixing seat 700 to the surface of the concrete 100, the lifting device will stop completely, and at this time, the lifting device 400 will not apply any direction acting force to the tension fixing seat 700, so that the independence and the stability of the tension fixing seat 700 and the jack 500 in the tension process are ensured.
The embodiment of the invention has the beneficial effects that: the vertical tensioning equipment for finish rolling screw thread steel structure that this embodiment provided for carry out vertical prestressing force tensioning to the reinforcing bar 200 that is located concrete 100 preformed hole recess, include: the device comprises a movable support 300, a lifting device 400, a jack 500, an anchoring device 600 and a tension fixing seat 700; the reinforcing steel bar 200 can be tensioned in a vertical prestress mode through the jack 500 and the anchoring device 600, and the concave part of the jack 500 can be prevented through the tensioning fixing seat 700, so that the jack 500 is convenient to position and install; furthermore, the hoisting device 400 drives the tensioning fixing seat 700 and the jack 500 to reciprocate, the hoisting device 400 can drive the tensioning fixing seat 700 to be arranged on the concrete 100, the hoisting device 400 can lift the jack 500 and the tensioning fixing seat 700 after tensioning operation to be in the air, the movable support 300 serves as an external support of the whole equipment, and the movable support 300 can move relative to the plane of the concrete 100, so that the whole equipment can be driven to move along the extending direction of a plurality of vertical finish rolling threaded steel structures which are vertically arranged in any one row in a plurality of rows in the concrete 100; thereby pass through jack 500, anchor 600 and stretch-draw fixing base 700 carry out the stretch-draw operation to finish rolling twisted steel 200, and gradually drive jack 500 through hoisting device 400 and movable support 300 after accomplishing the stretch-draw operation, anchor 600 and stretch-draw fixing base 700 carry out the stretch-draw operation to next finish rolling twisted steel 200, it is numerous that vertical finish rolling twisted steel constructs the prestressing force stretch-draw quantity that exists among the prior art can be alleviated to repeat above-mentioned process, staff work efficiency is low, the technical problem that working strength is big, construction efficiency is improved, and the method is suitable for being generalized to use.
On the basis of the above embodiment, further, in the preferred embodiment of the present invention, the movable bracket 300 includes a bracket body 301, an adjusting device 303 and a plurality of movable wheels 302; the plurality of moving wheels 302 are respectively arranged at one end of the bracket body 301 close to the concrete 100, and any one moving wheel 302 is connected with the bracket body 301 through a bearing; the adjusting device 303 is located at one end of the bracket body 301 close to the moving wheel 302, the adjusting device 303 is connected with the bracket body 301, and the adjusting device 303 is used for driving the bracket body 301 to ascend so that the moving wheel 302 is spaced from the surface of the concrete 100.
Alternatively, the bracket body 301 may adopt a hexahedral bracket, and the integral structure of the bracket body 301 is formed by sequentially connecting 12 connecting beams, and the bracket body 301 can be moved along the surface of the concrete 100 by the moving wheels 302 by installing the moving wheels 302 on the four supporting beams of the bracket body 301 respectively; preferably, the cross-sectional shape of the bracket body 301 may be a trapezoid, wherein one end of the bracket body 301 away from the moving wheel 302 is set as a small end of the trapezoid, and one end of the bracket body 301 close to the moving wheel 302 is set as a large end of the trapezoid, so that the bracket body 301 can be supported more stably when being located on the surface of the concrete 100; in addition, reinforcing beams can be additionally arranged at a plurality of side positions of the bracket body 301 for fixing, so that the overall structure of the bracket body 301 is more stable, and the service life of the bracket body 301 is prolonged.
In the preferred embodiment of the present invention, the bracket body 301 is provided with a reinforcing rib; the moving wheels 302 are universal wheels or mecanum wheels.
Preferably, the mecanum wheel has a compact structure and flexible movement, and is a successful omnidirectional wheel, and the combination of the 4 wheels can realize the omnidirectional movement function more flexibly and conveniently. Specifically, the motion of the support body 301 is controlled based on a four-wheel independent driving mode of a Mecanum wheel, the Mecanum wheel consists of two hubs and a certain number of small rollers, a supporting structure at two ends is adopted, the included angle between the axis of each small roller and the axis of each hub is +/-45 degrees, and the two materials are both made of corrosion-resistant radiation-proof materials; two left-handed structures and two right-handed structures of the four Mecanum wheels are mounted on the left side and the right side of the bracket body 301 in a mode that two left wheels and two right wheels are symmetrically arranged, each Mecanum wheel can be directly connected with a speed reduction motor through a synchronous pulley mechanism, and the movement of the bracket body 301 in different directions is realized by controlling the four wheels at different speeds; in addition, the moving wheels 302 can also be universal wheels, and the bracket body 301 can be moved by manual pushing, which will not be described herein again.
Optionally, in this embodiment, the adjusting device 303 may control the bracket body 301 to be in two states of being fixed or moving, that is, the adjusting device 303 may adjust a use state of the moving wheel 302, wherein the adjusting device 303 may drive the bracket body 301 to ascend and be fixed, at this time, the moving wheel 302 has a distance from the surface of the concrete 100, that is, the moving wheel 302 cannot move along the concrete 100, at this time, the adjusting device 303 serves as a fixed end of the bracket body 301, and may fix the bracket body 301 on the surface of the concrete 100.
In the preferred embodiment of the present invention, the adjusting device 303 includes a support frame 313, a torsion spring 323, and a connecting shaft 333; the support frame 313 is rotatably connected with the support body 301 through a connecting shaft 333, the torsion spring 323 is sleeved on one side of the connecting shaft 333, the torsion spring 323 has an elastic tendency that the support frame 313 is close to the support body 301, the height of the support frame 313 is larger than the diameter of the moving wheel 302, so that when the support frame 313 rotates to abut against the concrete 100, the moving wheel 302 is in a suspended position; one side of the supporting frame 313 is provided with a pedal support bar 334, and the pedal support bar 334 is fixedly connected with the supporting frame 313.
It should be noted that the friction force between the support frame 313 and the concrete 100 is greater than the acting force applied to the support frame 313 by the torsion spring 323, wherein the torsion spring 323 is used to ensure that when the support frame 313 is retracted, the support frame does not rotate and fall onto the surface of the concrete 100 due to the action of gravity to cause interference between the support body 301 and the concrete 100, thereby affecting the movement of the moving wheel 302.
In this embodiment, when the supporting frame 313 is supported by the torsion spring 323, the moving wheel 302 serves as the moving end of the supporting frame body 301 to drive the supporting frame body 301 to move along the surface of the concrete 100, after the supporting frame body 301 is located at a predetermined position, in order to prevent instability of the moving wheel 302, the pedal support rod 334 is used to drive the supporting frame 313 to rotate relative to the supporting frame body 301, so that the supporting frame 313 can stand on the surface of the concrete 100, because the height of the supporting frame is greater than the diameter of the moving wheel 302, the moving wheel 302 can be synchronously lifted by using the supporting frame 313 to lift the height of the supporting frame body 301, the moving wheel 302 can be separated from the surface of the concrete 100, and the supporting frame 313 serves as the fixed end of the supporting frame body 301 to fix the supporting frame body 301 on.
Optionally, before the support frame 313 drives the support body 301 to be lifted, the lifting device 400 may be used to drop the jack 500, the anchoring device 600 and the tension fixing seat 700 into the groove of the reserved hole of the concrete 100, and meanwhile, a margin is provided between the lifting device 400 and the tension fixing seat 700, so that when the support body 301 drives the lifting device 400 to be lifted, the lifting device 400 still does not apply an acting force to the tension fixing seat 700, and thus the support frame 313 can be better fixed.
In addition, the adjusting device 303 may further adopt a spring, a spring buckle and a vertical lifting rod to drive the bracket body 301 to be lifted and fixed, wherein the spring is sleeved outside the vertical lifting rod, the spring buckle is located at one end of the vertical lifting rod close to the moving wheel 302, the spring has an elastic tendency of making the vertical lifting rod far away from the surface of the concrete 100, thereby due to the supporting function of the spring, the moving wheel 302 can drive the bracket body 301 to move along the surface of the concrete 100 as the moving end of the bracket body 301, after the bracket body 301 is located at the designated position, in order to prevent instability of the moving wheel 302, the vertical lifting rod is driven to move downwards along the vertical direction by an external acting force, and the bracket body 301 can be lifted to a certain height by hand, when the vertical lifting rod extrudes the spring until the spring buckle is clamped, the vertical lifting rod is located at the fixed position, and at this moment, the vertical lifting rod can be used as the fixed end of the bracket body 301 to be in surface contact with the concrete 100, and the length of the vertical lifting rod extending out of the bracket body 301 is greater than the diameter of the moving wheel 302, so that the moving wheel 302 can be synchronously lifted while the height of the bracket body 301 is lifted by using the vertical lifting rod, the moving wheel 302 can be separated from the surface of the concrete 100, and the vertical lifting rod can be used as the fixed end of the bracket body 301 to fix the bracket body 301 on the surface of the concrete 100.
In the preferred embodiment of the present invention, the number of the adjusting devices 303 corresponds to the number of the moving wheels 302, so that one adjusting device 303 is disposed at the connection position of any moving wheel 302 and the bracket body 301.
Alternatively, when four moving wheels 302 are used, in which case the four adjusting devices 303 are also provided, the four adjusting devices 303 can sequentially separate the four moving wheels 302 from the ground, so that the bracket body 301 can be fixed on the surface of the concrete 100 through four supporting points.
In the preferred embodiment of the present invention, the hoist 400 includes a base 401, a driving motor 402, a coupling 405, a spool 403, and a hoist rope 404; the base 401 is connected with one end of the bracket body 301 far away from the concrete 100, the driving motor 402 is arranged on the base 401, the driving motor 402 is in transmission connection with the winding shaft 403 through a coupler 405, the lifting rope 404 is wound outside the winding shaft 403, and one end, extending out of the winding shaft 403, of the lifting rope 404 is connected with the tensioning fixing seat 700.
The connection mode between the base 401 and the bracket body 301 may be various, for example: welding, bolting, riveting, etc., preferably, the base 401 is connected to the bracket body 301 by bolting; specifically, a fixing beam is fixedly arranged on the bracket body 301, a groove connected with the fixing beam is arranged on the base 401, after the base 401 is clamped with the connecting beam, a fixing plate is arranged on the other side of the fixing beam, the fixing plate is also provided with a groove, the base 401 and the fixing plate are buckled outside the fixing beam by the groove, and the base 401 and the fixing plate are fixed by a plurality of bolts, so that the base 401 can be fixed on the bracket body 301; further, the base 401 may be directly connected to the housing of the driving motor 402 through a bolt, or the base 401 may be provided with an inner cavity, the driving motor 402 is located in the inner cavity, and the output end of the driving motor 402 can extend out of the inner cavity to be in transmission connection with the coupler 405 and the winding shaft 403.
The driving motor 402 is in transmission connection with the winding shaft 403 through the coupler 405, one end of the lifting rope 404 is fixedly connected with the winding shaft 403, and when the winding shaft 403 rotates, the lifting rope 404 can perform rope releasing and rope collecting motions along with the motion of the winding shaft 403, so that the tensioning fixing seat 700 connected to the other end of the lifting rope 404 performs ascending and descending motions; preferably, the lifting rope 404 is a steel wire rope.
In the preferred embodiment of the present invention, the anchoring device 600 comprises a first anchoring nut 601, a second anchoring nut 603, a first anchoring plate 602 and a second anchoring plate 604; the first anchor backing plate 602 and the first anchor nut 601 are sleeved at one end of the steel bar 200 close to the concrete 100, and the first anchor backing plate 602 is positioned between the first anchor nut 601 and the concrete 100; the second anchor backing plate 604 and the second anchor nut 603 are sleeved at one end of the steel bar 200 close to the jack 500, the second anchor backing plate 604 abuts against one end of the jack 500 far away from the tension fixing seat 700, and the second anchor nut 603 is used for abutting the second anchor backing plate 604 against the jack 500.
In order to facilitate the jack 500 to better push up the pre-tightening force steel bar 200, the first anchor backing plate 602 is abutted against one end of the jack 500 in the ejection direction, and the first anchor nut 601 is connected with the steel bar 200 in a threaded connection manner, so that the jack 500 in the ejection direction can apply acting force to the steel bar 200 through the first anchor nut 601 and the first anchor backing plate 602; second anchor backing plate 604 and second anchor nut 603 are as when prestressing steel 200 possesses corresponding prestressing force, and after jack 500 effect made reinforcing steel 200 extend, second anchor nut 603 and second anchor backing plate 604 in concrete 100 preformed hole recess can become not hard up this moment, and then exert force through the outside, drive second anchor nut 603 again to keeping away from jack 500 the direction carry out rotatory anchor until second anchor backing plate can hug closely in the recess in concrete 100 preformed hole once more.
For the groove position of the prepared hole of the concrete 100, since the second anchoring nut 603 in the groove needs to be screwed, in order to ensure the operation space of the second anchoring nut 603, in the preferred embodiment of the present invention, the tension fixing base 700 includes a fixing base body 701 and a plurality of supporting legs 702; the plurality of support legs 702 are arranged on one side of the fixing seat body 701, the jack 500 is arranged on the other side of the fixing seat body 701, any one of the support legs 702 is fixedly connected with the fixing seat body 701, and the fixing seat body 701 is abutted against the concrete 100 through the support leg 702, so that a gap space is formed between the fixing seat body 701 and the concrete 100.
Alternatively, the number of the legs 702 may be four, the holder body 701 may be configured as a rectangular flat plate, and by providing four legs 702 at four corners of the rectangular flat plate, the holder body 701 is fixed at a groove position of a prepared hole of the concrete 100 by the legs 702, and alternatively, the legs 702 may adopt cylindrical legs 702 or rectangular legs 702, etc.
When the depth of the groove in the preformed hole of the concrete 100 is shallow, since the gap space between the fixing base body 701 and the concrete 100 cannot be fastened by a wrench, in order to facilitate the fastening operation of the second anchor nut 603, in the preferred embodiment of the present invention, the present invention further includes a fastening device 800; the fastening device 800 is sleeved outside the steel bar 200, the fastening device 800 is located in a gap space between the fixing base body 701 and the concrete 100, and the fastening device 800 is clamped with the second anchoring nut 603.
It should be noted that the fastening device 800 provided in this embodiment may be clamped to the second nut, and after the jack 500 completes the pre-tightening and tensioning operation, a force is applied to the fastening device 800 through the outside, so that the fastening device 800 drives the second nut to be screwed and anchored.
Alternatively, the fastening device 800 may be detachably connected to a side of the holder body 701 close to the leg 702, for example: the fastening device 800 can be connected with the fixing seat body 701 in a hook mode, or can be connected with the fixing seat body 701 in a buckle and clamping groove mode, so that the fastening device 800 can be conveniently moved and transported.
In a preferred embodiment of the present invention, the fastening device 800 includes a first fastening portion and a second fastening portion; first fastening portion and second fastening portion integrated into one piece, and first fastening portion cover is located second anchor nut 603 outside to with second anchor nut 603 joint, second fastening portion is located the one end that second anchor nut 603 was kept away from to first fastening portion, the outside of second fastening portion is provided with the joint structure that is used for being connected with outside spanner.
In this embodiment, the first fastening portion may be selected for the structure of the second anchor nut 603, for example, when the second anchor nut 603 is a hexagon nut, the first fastening portion is configured to be in an internal hexagon shape to be clamped with the second anchor nut 603; or when the second anchor nut 603 is a square nut, the first fastening device 800 is configured to be engaged with the second anchor nut 603 in a square shape.
Optionally, the second anchoring portion is provided with a clamping portion on the outer surface, the clamping portion can be clamped with an external wrench, and the fastening device 800 is driven to rotate by the rotating force of the external wrench, so that the second anchoring nut 603 clamped with the first fastening portion is screwed and fixed.
In this embodiment, the whole height of first fastening portion and second fastening portion is greater than the height of second fastening nut, and the whole height of first fastening portion and second fastening portion is less than the height of the clearance space between fixing base body 701 and concrete 100, form fastener 800 through first fastening portion and second fastening portion and drive second anchor nut 603 and carry out the rotation fastening, can reduce the loss of the prestressing force in the reinforcing bar 200 prestressing force tension operation process, construction efficiency is improved, make the design more reasonable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a vertical stretch-draw equipment for finish rolling screw-thread steel constructs for carry out vertical prestressing force stretch-draw to the reinforcing bar that is located concrete preformed hole recess, its characterized in that includes: the device comprises a movable support, a lifting device, a jack, an anchoring device and a tensioning fixed seat;
the movable support is positioned on the concrete for fixing the steel bars and can move relative to the plane of the concrete, and the lifting device is connected with one end of the movable support, which is far away from the concrete;
the utility model discloses a concrete structure, including the tensioning fixing base, jack, anchor device, reinforcing bar, tensioning fixing base.
2. The vertical tensioning device for finish rolling threaded steel members according to claim 1, wherein the mobile bracket comprises a bracket body, an adjustment device and a plurality of mobile wheels;
the plurality of moving wheels are respectively arranged at one end of the bracket body close to the concrete, and any one of the moving wheels is connected with the bracket body through a bearing;
the adjusting device is located one end, close to the moving wheel, of the support body, the adjusting device is connected with the support body, and the adjusting device is used for driving the support body to ascend, so that the moving wheel and the concrete surface are spaced.
3. The vertical tensioning device for finish rolling threaded steel members according to claim 2, characterized in that the adjustment means comprise a support frame, a torsion spring and a connecting shaft;
the support frame is rotatably connected with the support body through the connecting shaft, the torsion spring is sleeved on one side of the connecting shaft, the torsion spring has an elastic tendency of enabling the support frame to be close to the support body, the height of the support frame is larger than the diameter of the moving wheel, and therefore when the support frame rotates to abut against concrete, the moving wheel is in a suspended position;
one side of the support frame is provided with a pedal support rod, and the pedal support rod is fixedly connected with the support frame.
4. A vertical tensioning device for finish rolling threaded steel members according to claim 3, characterised in that the number of said adjustment means corresponds to the number of said mobile wheels, so that one said adjustment means is provided at the junction of any one of said mobile wheels with said bracket body.
5. The vertical tensioning device for finish rolling threaded steel members according to claim 2, wherein the bracket body is provided with reinforcing ribs;
the moving wheels are universal wheels or Mecanum wheels.
6. The vertical tensioning device for finish rolling threaded steel members according to claim 2, wherein the hoisting means comprises a base, a drive motor, a coupling, a spool and a lifting rope;
the base with the support body is kept away from the one end of concrete and is connected, driving motor set up in on the base, driving motor passes through the shaft coupling with the spool transmission is connected, the lifting rope is around locating the outside of spool, the lifting rope stretches out the one end of spool with stretch-draw fixing base is connected.
7. The vertical tensioning device for finish rolling threaded steel members according to any one of claims 1 to 6, characterized in that the anchoring means comprises a first anchoring nut, a second anchoring nut, a first anchor pad and a second anchor pad;
the first anchor backing plate and the first anchor nut are sleeved at one end, close to the concrete, of the reinforcing steel bar, and the first anchor backing plate is located between the first anchor nut and the concrete; the second anchor backing plate with second anchor nut cover is located the reinforcing bar is close to the one end of jack, the second anchor backing plate with the jack is kept away from the one end butt of stretch-draw fixing base, second anchor nut be used for with the second anchor backing plate is close to in the jack.
8. The vertical tensioning device for finish rolling threaded steel structures according to claim 7, wherein the tensioning mount comprises a mount body and a plurality of legs;
a plurality of the supporting legs are arranged on one side of the fixing seat body, the jack is arranged on the other side of the fixing seat body, any one of the supporting legs is fixedly connected with the fixing seat body, and the fixing seat body is abutted against concrete through the supporting legs, so that a clearance space is formed between the fixing seat body and the concrete.
9. The vertical tensioning device for finish rolling threaded steel members according to claim 8, further comprising a fastening means;
the fastening device is sleeved outside the reinforcing steel bar and located in a gap space between the fixing seat body and the concrete, and the fastening device is clamped with the second anchoring nut.
10. The vertical tensioning device for finish rolling threaded steel members according to claim 9, characterized in that the fastening means comprises a first fastening portion and a second fastening portion;
first fastening portion with second fastening portion integrated into one piece, just first fastening portion cover is located second anchor nut is outside, and with second anchor nut joint, second fastening portion is located first fastening portion is kept away from the one end of second anchor nut, the outside of second fastening portion is provided with the joint structure that is used for being connected with external spanner.
CN201911176528.3A 2019-11-26 2019-11-26 Vertical tensioning equipment for finish rolling of deformed steel structures Pending CN110820585A (en)

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