CN108284511B - Prestressed track slab steel bar stretching machine - Google Patents
Prestressed track slab steel bar stretching machine Download PDFInfo
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- CN108284511B CN108284511B CN201810196951.9A CN201810196951A CN108284511B CN 108284511 B CN108284511 B CN 108284511B CN 201810196951 A CN201810196951 A CN 201810196951A CN 108284511 B CN108284511 B CN 108284511B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
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Abstract
The invention discloses a prestressed track slab steel bar stretching machine which comprises a stretching machine frame, wherein stretching sliding frames which are oppositely arranged on the outer sides of two opposite sides of a track slab die and are driven by a power mechanism to lift are connected to the stretching sliding frames in a sliding mode, a stretching combination frame driven by the power mechanism is connected to the stretching sliding frames, a jacking rod is connected to the stretching combination frame, two opposite stretching combination frames are correspondingly provided with stretching frames driven by the stretching power mechanism, the front end of each stretching frame is provided with a fixed stretching claw, the stretching frames are connected with a stretching stress monitoring device, the stretching combination frames are also provided with inclined pad hammering devices driven by a power device to slide up and down, each inclined pad comprises at least two inclined pad bodies connected up and down, and each inclined pad body is provided with an elongated slot for a steel bar to penetrate through the bottom of the inclined pad body. The invention has the advantages of ensuring the tensioning quality and keeping the prestress of the multi-layer steel bars consistent, thereby effectively ensuring the production quality of the track slab and improving the labor efficiency.
Description
Technical Field
The invention relates to a prestressed track slab steel bar stretching machine.
Background
At present, with the continuous development of the construction level of the high-speed railway in China, the structural form of the ballastless track is generally adopted. In order to perfect ballastless track structure types under different operation conditions and provide powerful technical support for the development strategy of 'going out' of high-speed railways in China, related organizations of the railway department independently develop CRTS III plate type ballastless track structures.
In the production process of the CRTS III type track slab (prestressed track slab), the following process steps are required, firstly, the mould is cleaned to ensure the appearance quality of the track slab concrete, and after the template is cleaned up, a layer of release agent is uniformly sprayed; secondly, installing and hoisting the embedded sleeve, putting a reinforcement cage and threading, performing initial tension and pre-tightening on the reinforcement after threading, then putting the reinforcement into a cushion block, tensioning the reinforcement, and performing insulation detection after tensioning is finished; and finally, putting concrete into the mould, vibrating, performing steam curing, then releasing, detaching, demoulding and performing water bath curing.
In the process of stretching the steel bars, a stretching machine is needed to stretch the steel bars so that the steel bars have certain prestress, the longitudinal and transverse steel bars of the track slab are controlled by a single-end simultaneous stretching mode according to the production requirement of the prestressed track slab, the stretching of the steel bars is uniform, the loading rate and the stretching force are strictly specified in quantity, and the steel bars are locked after the stretching is finished. Firstly, the end part of the reinforcing steel bar is connected with a tension rod (the reinforcing steel bar and the tension rod are combined and pre-tightened through a primary tension process), the end part of the tension rod is provided with a special-shaped nut, a combining head of the tension machine needs to hold the special-shaped nut in the tension process, and the conventional tension machine cannot realize quick and accurate clamping, so that the labor efficiency is low; secondly, in the locking process, a cushion spacer needs to be arranged between the outer side of the track slab die and a ring table of the tension rod, so that the steel bars are kept in prestress, the existing tension machine cannot enable a plurality of layers of steel bars to be arranged in the cushion spacer with the same angle and thickness, the problem that the prestress of the steel bars is inconsistent is easily caused, and the production quality of the track slab is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing the prestressed track slab steel bar tensioning machine which can quickly and accurately clamp the end part of the tensioning rod so as to realize tensioning, can automatically put an inclined pad after tensioning is finished, and keeps the prestress of a plurality of layers of steel bars consistent.
In order to solve the technical problem, the provided prestressed track slab steel bar stretching machine comprises a stretching machine frame, and is characterized in that: the tensioning device is characterized in that a tensioning sliding frame which is oppositely arranged at the outer sides of two opposite sides of a track plate die and is driven by a power mechanism to synchronously lift is connected to the tensioning frame, a tensioning combination frame which is driven by the combination power mechanism to slide inside and outside the tensioning frame is connected to the tensioning combination frame, a jacking rod which can be jacked and leaned on the track plate die is connected to the tensioning combination frame, tensioning frames which are driven by the tensioning power mechanism are correspondingly arranged on the two opposite tensioning combination frames, a fixed tensioning claw which is used for enabling a special-shaped nut of a tensioning rod on the track plate die to stretch into is arranged at the front end of the tensioning frame, a tensioning stress monitoring device is connected to the tensioning frame, an inclined pad hammering device which is driven by the power device to slide up and down and can drive an inclined pad to be hammered into a space between a ring platform of the tensioning rod and a fixed inclined plate of the track plate die is also arranged on the tensioning combination frame, the inclined pad comprises at least two inclined pad bodies which are connected up and down, the inclined pad body is provided with a long groove for the steel bar to pass through from the bottom of the inclined pad body.
After the structure is adopted, the special-shaped nut of the tension rod is utilized, the lifting tension sliding frame and the translation tension combining frame are utilized, so that the special-shaped nut is positioned in the fixed tension claw, the end part of the tension rod is quickly and accurately clamped, the tension rod is effectively tensioned through the tension power mechanism, the same steel bar is tensioned by the two opposite tension frames, meanwhile, the tension stress is recorded and detected through the tension stress monitoring device, so that the prestress of the controlled steel bar is accurately realized, the leaning rod is leaned against the track plate die through the leaning rod, the track plate die can be effectively prevented from moving in the tensioning process, so that the position of the steel bar in the track plate die is ensured, the product quality is improved, in addition, the inclined pad hammering device and the inclined pad with the structure can ensure that a plurality of layers of steel bars are put into the inclined pads with the same angle and thickness, the prestress consistency of a plurality of steel bars is ensured, and the product quality is improved.
The tensioning power mechanism comprises a tensioning oil cylinder connected to the tensioning combination frame, the tensioning stress monitoring device comprises a displacement sensor connected to the sliding distance of the monitoring tensioning frame, and a piston rod of the tensioning oil cylinder and the tensioning frame are provided with pressure sensors.
The tensioning frame comprises a front end plate and a rear end plate, a guide pillar is connected between the front end plate and the rear end plate, the guide pillar is connected to the tensioning combination frame in a sliding mode, the rear end plate is connected with a tensioning power mechanism in a power mode, the fixed tensioning claw is connected to the front end plate, the fixed tensioning claw comprises a tensioning frame body with a containing cavity arranged in the fixed tensioning claw, and a notch for the tensioning rod to stretch into is formed in the front portion of the tensioning frame body.
The inclined pad bodies are connected into a whole through connecting bolts, the inclined pad body at the top is provided with a notch extending from bottom to top, the notch is the elongated slot, the rest inclined pad bodies consist of two inclined irons arranged in parallel at intervals, the space between the two inclined irons forms the elongated slot, and a vertically arranged anti-rotation rod is connected between the upper and lower adjacent inclined pad bodies.
The inclined pad hammering-in device comprises an upper pressing cylinder and a lower pressing cylinder which are connected to a tensioning combination frame, a pressing frame is connected to a piston rod of the upper pressing cylinder in a power mode, two upper pressing hammers which can press against two side portions of the top surface of the inclined pad are arranged on the pressing frame, and lower pressing hammers which can press against the middle portion of the top surface of the inclined pad are arranged on the lower pressing cylinder.
The tensioning sliding frame is connected to the tensioning rack in a sliding mode, the power mechanism comprises a vertical lead screw which is connected to the tensioning rack and driven to rotate by a power machine, and a nut which is in threaded connection with the vertical lead screw is connected to the tensioning sliding frame.
The four corners of the tensioning rack are provided with vertical screw rods, and are provided with four tensioning sliding frames which are oppositely arranged, and the nuts are connected to the two end parts of the tensioning sliding frames; the tensioning rack comprises four stand columns, the vertical screw rods are rotatably connected in the stand columns, and the tops of the two adjacent stand columns are connected with a connecting cross beam.
The tensioning combination frame is connected to the tensioning sliding frame in a sliding mode, the combination power mechanism comprises a power oil cylinder connected to the tensioning sliding frame, and the tensioning combination frame is in power connection with a piston rod of the power oil cylinder.
In summary, compared with the prior art, the scheme has the following advantages: the invention can quickly and accurately clamp the end part of the tensioning rod so as to realize tensioning, can automatically put the inclined pad after the tensioning is finished, and has the advantages of ensuring the tensioning quality, keeping the prestress of a plurality of layers of reinforcing steel bars consistent so as to effectively ensure the production quality of the track slab and improve the labor efficiency.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic perspective view of FIG. 1;
FIG. 3 is a schematic structural view of a tension frame;
FIG. 4 is a schematic structural view taken along line A-A in FIG. 3;
FIG. 5 is a schematic view of the construction of the inclined pad hammering device;
FIG. 6 is a schematic view of the right side view of FIG. 5;
fig. 7 is a schematic structural view of the rail plate mold.
Detailed Description
As shown in fig. 7, the applicant has manufactured a track slab mold 20 for producing a prestressed track slab, the basic structure of which is the same as that of a track slab mold in the prior art, the track slab mold has a mold cavity, the structure and shape in the mold cavity are both used for manufacturing a prestressed track slab, the detailed structure is not repeated, a tension rod 21 is inserted on the side wall of the track slab mold, a special-shaped nut 211 is arranged at the end of the tension rod, the tension rod can be screwed by a wrench in a mechanical or manual manner, so that the end of a steel bar is combined with the tension rod, the existing equipment cannot realize the quick and accurate clamping of the tension rod, so that the tensioning efficiency is low and the tensioning quality is poor, a ring platform 212 is further arranged at the middle part of the tension rod 21, a fixed inclined iron 22 corresponding to the ring platform is arranged on the side wall of the track slab mold, after the tensioning of the steel bar is finished, an inclined pad can be placed between the fixed inclined iron and the ring platform, therefore, the pretightening force of the steel bars is kept, and the arrangement of two layers of steel bars can be clearly seen according to the drawing, so that an upper inclined pad and a lower inclined pad need to be placed, the two inclined pads cannot be placed simultaneously in the existing equipment, and the two layers of steel bars cannot be placed into the inclined pads with the same angle and thickness.
As shown in fig. 1 and 2, the present invention provides an embodiment of a prestressed track slab steel bar stretching machine, which includes a stretching machine frame 1, wherein the stretching machine frame 1 is slidably connected with stretching sliding frames 2 that are oppositely disposed at the outer sides of two opposite sides of a track slab mold and are synchronously lifted and lowered by a power mechanism, the stretching sliding frames 2 are slidably connected to the stretching machine frame 1 through a sliding plate and guide rail structure, of course, the sliding connection can also be realized by adopting a guide sleeve and guide post structure, the power mechanism includes a vertical screw rod that is connected to the stretching machine frame 1 and is driven to rotate by a power machine, the power machine is a servo motor, and the stretching sliding frames are connected with nuts that are screwed on the vertical screw rod. In order to improve the stability of stretch-draw frame and the stability that stretch-draw frame slided the frame and goes up and down, in this embodiment, stretch-draw frame 1 roughly is squarely, and it includes four stands, and the stand passes through lower margin bolted connection subaerial, and the top of two adjacent stands is connected with the connection crossbeam to form stable frame rack structure, four bights of this stretch-draw frame all set up vertical lead screw, set up four lead screws altogether promptly, vertical lead screw rotates to be connected in the stand, sets up four relative stretch-draw slideings that set up altogether, the screw is connected at the both ends of stretch-draw slideing the frame, and a plurality of servo motor synchronous drive lead screws of control rotate promptly, thereby make the steady lift of stretch-draw slideing the frame.
As shown in fig. 1 and 2, the tension sliding frame 2 is connected with a tension combination frame 3 which is driven by a combination power mechanism to slide inside and outside along the tension frame, and the inside and outside in the invention mean: the track board mould is placed at the middle part of stretch-draw frame, and the position that is close to the track board mould is the inboard of stretch-draw frame, keeps away from the track board mould and is its outside, and stretch-draw joint frame 3 sliding connection is on stretch-draw slip frame 2, combination power unit is including connecting the power cylinder on stretch-draw slip frame 2, stretch-draw joint frame 3 is connected with power cylinder's piston rod power.
As shown in fig. 2, 3 and 4, the stretching and drawing combined frame 3 is connected with a top leaning rod 4 which can lean against the track slab die, two opposite stretching and drawing combined frames 3 are correspondingly provided with stretching and drawing frames 5 driven by a stretching and drawing power mechanism, the front end of each stretching and drawing frame 5 is provided with a fixed stretching and drawing claw 6 for stretching a special-shaped nut of the stretching and drawing rod on the track slab die, each stretching and drawing frame 5 comprises a front end plate 51 and a rear end plate 52, a guide pillar 53 is connected between the front end plate and the rear end plate, the guide pillar 53 is slidably connected on the stretching and drawing combined frame 3, the rear end plate 52 is in power connection with the stretching and drawing power mechanism, the fixed stretching claw 6 is connected on the front end plate, the fixed stretching claw 6 comprises a stretching and drawing frame body which is internally provided with a containing cavity, the front part of the stretching and drawing frame body is provided with a gap for stretching and drawing the stretching, the fixed stretching claw is higher than the stretching and drawing rod by lifting and lowering the stretching and drawing sliding combined frame, the fixed tensioning claw 6 is positioned right above the special-shaped nut of the tensioning rod, and then the tensioning sliding frame falls down, so that the special-shaped nut is positioned in the accommodating cavity of the fixed tensioning claw, and the end part of the tensioning rod is clamped quickly and accurately.
As shown in fig. 3 and 4, be connected with the tension stress monitoring device on the stretch-draw frame 5, tension power unit is including connecting the stretch-draw hydro-cylinder 8 at stretch-draw joint frame 3, the tension stress monitoring device is including connecting the displacement sensor 9 at the distance of sliding of monitoring stretch-draw frame 5, and particularly, displacement sensor 9 is connected between rear end plate and stretch-draw hydro-cylinder 8's outer wall, stretch-draw hydro-cylinder 8's piston rod and stretch-draw frame 5 are equipped with pressure sensor 10, and through this displacement sensor and pressure sensor's monitoring, the dynamics of fully guaranteeing the stretch-draw and the extension length of reinforcing bar have guaranteed promptly that the reinforcing bar has suitable prestressing force.
As shown in fig. 2, 5 and 6, the tension combining frame 3 is further provided with an inclined pad hammering device which is driven by a power device to slide up and down and can hammer an inclined pad 7 into a space between a ring platform of the tension rod and a fixed inclined plate of the track plate mold, the inclined pad 7 comprises at least two inclined pad bodies 71 which are connected up and down, and the inclined pad bodies 71 are provided with elongated slots for steel bars to pass through from the bottoms of the inclined pad bodies 71. The plurality of inclined cushion bodies 71 are connected into a whole through connecting bolts 73, the topmost inclined cushion body 71 is provided with a notch extending from bottom to top, the notch is the long groove, the rest inclined cushion bodies 71 are composed of two pieces of inclined iron arranged in parallel at intervals, the long groove is formed in the space between the two pieces of inclined iron, a vertically arranged anti-rotation rod 72 is connected between the upper and lower adjacent inclined cushion bodies, namely the inclined cushion bodies are connected in series through the bolts, the anti-rotation rod is arranged for preventing the inclined cushion bodies from rotating and deviating, particularly, the inclined cushion body is composed of the two pieces of inclined iron, and the two pieces of inclined iron can have the same angle and position through the structure. The cushion hammering-in device comprises an upper pressing cylinder 11 and a lower pressing cylinder 12 which are connected to a tensioning combination frame 3, a compression frame 13 is connected to a piston rod of the upper pressing cylinder 11 in a power mode, two upper pressing hammers 14 capable of pressing two sides of the top surface of the cushion 7 are mounted on the compression frame 13, and a lower pressing hammer 15 capable of pressing the middle of the top surface of the cushion 7 is mounted on the lower pressing cylinder 12.
While the invention has been described with reference to specific exemplary embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a prestressing force track board reinforcing bar stretch-draw machine, includes stretch-draw frame (1), characterized by: the tensioning device is characterized in that a tensioning sliding frame (2) which is oppositely arranged on the outer sides of two opposite sides of a track plate die and synchronously ascends and descends by being driven by a power mechanism is slidably connected onto the tensioning frame (1), a tensioning combination frame (3) which is driven by the combination power mechanism to slide inside and outside the tensioning frame is connected onto the tensioning sliding frame (2), a top leaning rod (4) which can lean against the track plate die is connected onto the tensioning combination frame (3), tensioning frames (5) which are driven by the tensioning power mechanism are correspondingly arranged on the two opposite tensioning combination frames (3), a fixed tensioning claw (6) for stretching a special-shaped nut of a tensioning rod on the track plate die into is arranged at the front end of each tensioning frame (5), a tensioning stress monitoring device is connected onto each tensioning frame (5), the tensioning combination frame (3) is also provided with an inclined pad hammering device which is driven by the power device to slide up and down and can hammer an inclined pad (7) into the space between a ring platform of the tensioning rod and a fixed inclined plate die, the inclined pad (7) comprises at least two inclined pad bodies (71) which are connected up and down, and the inclined pad bodies (71) are provided with long grooves for the steel bars to pass through from the bottoms of the inclined pad bodies; the tensioning power mechanism comprises a tensioning oil cylinder (8) connected to the tensioning combination frame (3), the tensioning stress monitoring device comprises a displacement sensor (9) connected to the monitoring tensioning frame (5) for monitoring the sliding distance, and a piston rod of the tensioning oil cylinder (8) and the tensioning frame (5) are provided with pressure sensors (10); stretch-draw frame (5) include front end plate (51) and rear end plate (52), are connected with guide pillar (53) between front end plate and the rear end plate, and guide pillar (53) sliding connection is on stretch-draw combination frame (3), the rear end plate is connected with stretch-draw power unit power, fixed stretch-draw claw (6) are connected on the front end plate, and fixed stretch-draw claw (6) are including establishing the stretch-draw framework that holds the chamber, and the front portion of stretch-draw framework is equipped with the breach that supplies the stretch-draw pole to stretch into.
2. The prestressed track slab reinforcing bar stretching machine according to claim 1, wherein: the inclined cushion bodies (71) are connected into a whole through connecting bolts, the inclined cushion body (71) at the top is provided with a notch extending from bottom to top, the notch is an elongated slot, the rest inclined cushion bodies (71) are composed of two inclined irons arranged in parallel at intervals, the space between the two inclined irons forms the elongated slot, and a vertically arranged anti-rotation rod (72) is connected between the upper and lower adjacent inclined cushion bodies.
3. The prestressed track slab reinforcing bar stretching machine according to claim 1, wherein: the inclined pad hammering device comprises an upper pressing cylinder (11) and a lower pressing cylinder (12) which are connected to a tensioning combination frame (3), a compression frame (13) is connected to a piston rod of the upper pressing cylinder (11) in a power mode, two upper pressing hammers (14) capable of pressing against two sides of the top surface of an inclined pad (7) are mounted on the compression frame (13), and lower pressing hammers (15) capable of pressing against the middle of the top surface of the inclined pad (7) are mounted on the lower pressing cylinder (12).
4. The prestressed track slab reinforcing bar stretching machine according to claim 1, wherein: the tensioning sliding frame (2) is connected to the tensioning frame (1) in a sliding mode, the power mechanism comprises a vertical screw rod which is connected to the tensioning frame (1) and driven to rotate by a power machine, and a nut which is screwed on the vertical screw rod is connected to the tensioning sliding frame (2).
5. The prestressed track slab reinforcing steel tensioning machine according to claim 4, wherein: vertical lead screws are arranged at four corners of the tensioning rack (1), four tensioning sliding frames which are oppositely arranged are arranged, and the nuts are connected to two end parts of the tensioning sliding frames; the tensioning rack (1) comprises four upright columns, the vertical screw rods are rotatably connected in the upright columns, and the tops of the two adjacent upright columns are connected with a connecting cross beam.
6. The prestressed track slab reinforcing steel tensioning machine according to any one of claims 1 to 5, wherein: stretch-draw combines frame (3) sliding connection on stretch-draw slip frame (2), combine power unit including connecting the power cylinder on stretch-draw slip frame (2), stretch-draw combines frame (3) and power cylinder's piston rod power is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810196951.9A CN108284511B (en) | 2018-03-10 | 2018-03-10 | Prestressed track slab steel bar stretching machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810196951.9A CN108284511B (en) | 2018-03-10 | 2018-03-10 | Prestressed track slab steel bar stretching machine |
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| CN108284511A CN108284511A (en) | 2018-07-17 |
| CN108284511B true CN108284511B (en) | 2022-08-16 |
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| CN201810196951.9A Active CN108284511B (en) | 2018-03-10 | 2018-03-10 | Prestressed track slab steel bar stretching machine |
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Families Citing this family (1)
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| CN108943380B (en) * | 2018-09-28 | 2024-03-26 | 山东豪迈机械制造有限公司 | Locking device and prestressed reinforcement tensioning device |
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| CN108284511A (en) | 2018-07-17 |
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