CN109093839B - Prestressed rib stretching structure for prestressed floor slab - Google Patents
Prestressed rib stretching structure for prestressed floor slab Download PDFInfo
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- CN109093839B CN109093839B CN201810909027.0A CN201810909027A CN109093839B CN 109093839 B CN109093839 B CN 109093839B CN 201810909027 A CN201810909027 A CN 201810909027A CN 109093839 B CN109093839 B CN 109093839B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000000670 limiting effect Effects 0.000 claims description 18
- 210000002435 tendon Anatomy 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
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Abstract
The invention discloses a prestressed reinforcement stretching structure for a prestressed floor, which comprises a jack mechanism and a force transmission frame, wherein the telescopic end of the jack mechanism is connected with a prestressed reinforcement through a pull rod and an end rod in sequence, a locking piece is sleeved on the end rod, and the locking piece comprises a first positioning cylinder and a second positioning cylinder; the first positioning cylinder is sleeved on the end rod in a clearance fit manner, a plurality of mounting through holes are formed in the side wall of the first positioning cylinder, and positioning blocks are movably arranged in the mounting through holes; the second positioning cylinder is sleeved on the outer wall of the first positioning cylinder, and simultaneously presses the positioning block to the outer wall of the end rod so that the positioning block is in compression contact with the outer wall of the end rod. According to the invention, through the mutual matching of the first positioning cylinder, the movable positioning block and the second positioning cylinder, the locking effect is realized through a simple linear sliding effect, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of prestressed concrete member manufacturing, in particular to a prestressed reinforcement stretching structure for a prestressed floor slab.
Background
The prestress is to improve the service performance of the structure, compressive stress is pre-applied to the structure during construction, and the prestress can fully or partially counteract tensile stress caused by load during the service of the structure, so that the structural damage is avoided. Is commonly used for concrete structures. The prestressed concrete structure is characterized in that before the structure bears load, pressure is applied to the structure in advance, so that the compressive stress is generated by the internal force of the concrete in a tension zone when external load acts, the tensile stress generated by the external load is counteracted or reduced, and the structure does not generate cracks or cracks later under the normal use condition. The prestressed floor slab is characterized in that tension stress is applied to stressed steel bars in the production process, so that the concrete at a tension part of the slab is prevented from cracking during working, the function of the tension steel bars is fully exerted, and steel materials are saved.
When the tension is carried out, after the tension of the tension rod reaches a designed force value, the locking nut on the tension rod is locked, so that the steel bar is always kept in a stressed state. In the prior art, the locking operation is carried out by manually rotating the nuts one by one, and particularly, in the process of stretching prestressed steel bars for many times, the nuts need to be rotated and screwed for many times, which is time-consuming and labor-consuming and affects the efficiency.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in the prior art, the locking operation is carried out by manually rotating nuts one by one, and particularly in the process of stretching prestressed reinforcement for multiple times, the nuts need to be rotated and screwed for multiple times, which is time-consuming and labor-consuming and affects the efficiency.
The invention is realized by the following technical scheme:
the prestress rib stretching structure for the prestress floor comprises a jack mechanism and a force transmission frame, wherein the telescopic end of the jack mechanism is connected with prestress ribs through a pull rod and an end rod in sequence, a locking piece is sleeved on the end rod, and the locking piece comprises a first positioning cylinder and a second positioning cylinder; the first positioning cylinder is sleeved on the end rod in a clearance fit manner, a plurality of mounting through holes are formed in the side wall of the first positioning cylinder, and positioning blocks are movably arranged in the mounting through holes; the second positioning cylinder is sleeved on the outer wall of the first positioning cylinder, and simultaneously presses the positioning block to the outer wall of the end rod so that the positioning block is in compression contact with the outer wall of the end rod.
The working principle of the invention is as follows: when the stretching of the stretching rod reaches a designed force value, the first positioning cylinder is moved to a position needing to be locked, at the moment, the positioning block is movably contacted with the outer wall of the end rod, the positioning block protrudes out of the outer wall of the first positioning cylinder through the mounting through hole, then the second positioning cylinder is moved along the end rod, so that the second positioning cylinder slides along the outer wall of the first positioning cylinder until the second positioning cylinder is completely sleeved on the first positioning cylinder, in the process of sleeving the second positioning cylinder on the first positioning cylinder, the positioning block in the mounting through hole on the side wall of the first positioning cylinder is pressed by the inner wall of the second positioning cylinder to press the outer wall of the end rod, and the positioning block is pressed between the inner wall of the second positioning cylinder and the outer wall of the end rod in a transition fit manner, and is tightly clamped and locked through a plurality of positioning blocks annularly arranged along the circumferential direction of the end rod. Through the mutual cooperation of the first positioning cylinder, the movable positioning block and the second positioning cylinder, the locking effect is realized through simple linear sliding effect, and the operation is convenient.
Preferably, the positioning block is in an isosceles trapezoid structure along the axis direction, the plate surface direction of the positioning block of the isosceles trapezoid structure is perpendicular to the side wall surface of the first positioning cylinder, the top of the isosceles trapezoid structure is rotationally connected with the inner wall of the mounting through hole through a fixed shaft, and the rotation direction of the positioning block is perpendicular to the plate surface direction of the positioning block.
Through adopting isosceles trapezoid platy structure's locating piece, realize the swing joint in the installation through-hole through the pivot, guarantee can not produce the barrier effect when first positioning tube moves along the end pole, also conveniently directly overlap establish second positioning tube and realize locking operation. The second positioning cylinder can be sleeved on the first positioning cylinder along the direction from the top to the bottom of the isosceles trapezoid, so that the force application and the resistance reduction are facilitated.
Preferably, the inner side and the outer side of the positioning block are both provided with planes which are contacted with the inner wall of the second positioning cylinder and the outer wall of the end rod at the positions close to the outer edge of the bottom edge.
If the positioning block with the isosceles trapezoid structure is directly adopted, the positioning block is in line contact with the inner wall of the second positioning cylinder and the outer wall of the end rod, so that the contact area is small, and the inner wall of the second positioning cylinder and the end rod are easy to damage; therefore, the planes which are in contact with the inner wall of the second positioning cylinder and the outer wall of the end rod are arranged at the positions, close to the outer edges of the bottom edges, of the inner side and the outer side of the inner side of the positioning block, the bottoms of the two sides of the positioning block are in surface contact with the inner wall of the second positioning cylinder and the outer wall of the end rod, the contact area is increased, and the structural connection stability is improved.
Preferably, the inner side edge of the positioning block is close to the outer edge plane at the bottom edge, and the outer wall of the end rod is provided with mutually meshed corrugated teeth.
The corrugated teeth can be arranged on the outer edge plane of the inner side edge of the positioning block, which is close to the bottom edge, and the corrugated teeth are arranged on the outer wall of the end rod, so that the friction resistance when the locking is fixed is increased through the mutual engagement and contact of the corrugated teeth, and the firmness of the locking structure is improved.
Preferably, a rubber pad is arranged on the outer edge plane of the outer side edge of the positioning block close to the bottom edge, and the rubber pad is in transition fit contact with the inner wall of the second positioning cylinder.
If the inner wall of the second sleeve is in long-term rigid contact sliding with the positioning block, the structure is easy to damage and inconvenient to operate; therefore, the outer bottom edge of the positioning block is flexibly contacted with the inner wall of the second positioning cylinder through the rubber pad, so that the friction resistance is increased, the mechanical external force is conveniently applied to push the second positioning cylinder to be quickly sleeved on the first positioning cylinder, and the protection structure is not damaged.
Preferably, a plurality of wedge-shaped positioning grooves are formed in the inner wall of the second positioning cylinder, the second positioning cylinder is sleeved on the first positioning cylinder in a sliding mode, the depth of each positioning groove is gradually increased, and the outer edge part of the rubber pad at the bottom of the outer side wall of each positioning block is embedded into the deepest part of each positioning groove to be fixed.
After the second positioning cylinder is completely sleeved on the first positioning cylinder, a rubber pad part on the outer edge plane of the outer side of the positioning block is just embedded into the positioning groove, so that the second positioning cylinder is locked to a certain extent, and the first positioning cylinder and the second positioning cylinder are limited to axially and relatively slide.
Preferably, a first limiting ring plate is arranged on the outer wall of one end of the first positioning cylinder, which is close to the prestressed reinforcement, in a circumferential direction, and a plurality of thread positioning columns are arranged on the upper plate surface of the first limiting ring plate in a protruding manner; the outer wall ring of one end of the second positioning cylinder, which is close to the first positioning cylinder, is provided with a second limiting ring plate, and the second limiting ring plate is provided with a plurality of waist-shaped holes for penetrating the positioning column, and the positioning column is locked and fixed through a nut.
After repeated stretching and locking operations are performed for many times, after the stretching of the stretching rod reaches a final design force value, the first positioning cylinder and the second positioning cylinder can be locked through the two limiting ring plates, the positioning column, the waist-shaped hole and the nut, and the limiting ring plates are further beneficial to increasing the contact area between the first positioning cylinder and the end face of the second positioning cylinder and the end face of the concrete member.
Preferably, the end part of the second positioning cylinder far away from the first positioning cylinder is integrally provided with a cover plate, a through hole for passing through the end rod in clearance fit is formed in the cover plate, and rubber inverted teeth are arranged on the inner wall of the through hole.
Closing the end part of the second sleeve, which is far away from the first sleeve, through a cover plate, and then forming a through hole allowing the end rod to pass through the cover plate, wherein the outer wall of the end rod is contacted with the inner wall of the through hole through a set rubber inverted tooth; in the installation process, the first positioning cylinder is close to the end of the prestressed reinforcement, the second positioning cylinder is positioned at one end far away from the prestressed reinforcement, and by arranging the rubber inverted tooth, the resistance of the rubber inverted tooth to the outer wall of the end rod is smaller in the process that the second positioning cylinder slides along the end rod to be close to the first positioning cylinder, and the second positioning cylinder can slide only by applying smaller external force; however, in the process that the second positioning cylinder slides to be far away from the first positioning cylinder, the resistance of the outer wall of the opposite end of the rubber inverted tooth is large, and larger external force is required to be applied to push the second positioning cylinder; therefore, the limiting effect of the second positioning cylinder on the end rod is realized through the rubber inverted tooth.
Preferably, the force transmission frame comprises a top ring plate and a bottom ring plate, and two fixed support plates are symmetrically arranged between the top ring plate and the bottom ring plate; the top ring plate and the bottom ring plate are opposite to each other, a sliding rail is arranged on the opposite plate surfaces of the top ring plate and the bottom ring plate in a ring mode, the force transmission frame further comprises a plurality of auxiliary supporting rods, and sliding rail sliding wheels on the top ring plate and the bottom ring plate are respectively arranged at two axial ends of the auxiliary supporting rods.
The main body mechanism of the force transmission frame is formed by a top ring plate, a bottom ring plate and a supporting plate, and then a plurality of auxiliary supporting rods can be slidably arranged between the top ring plate and the bottom ring plate by arranging sliding rails on the opposite plate surfaces of the top ring plate and the bottom ring plate in a ring manner, and in the process of tensioning the prestressed reinforcement by a jack, the auxiliary supporting rods are slid, so that the auxiliary supporting rods are uniformly dispersed at equal intervals and are used for dispersing supporting acting force of the supporting plate to play a role of auxiliary supporting; after the tension of the tension rod reaches a designed force value, the auxiliary supporting rods are slid, so that the distance between any two adjacent supporting rods is increased, and enough space is provided for workers to operate the first positioning cylinder and the second positioning cylinder.
Preferably, the auxiliary supporting rod is in a spindle-shaped columnar structure. The stress stability of the auxiliary supporting rod is improved.
The invention has the following advantages and beneficial effects:
1. the working principle of the invention is as follows: when the stretching of the stretching rod reaches a designed force value, the first positioning cylinder is moved to a position needing to be locked, at the moment, the positioning block is movably contacted with the outer wall of the end rod, the positioning block protrudes out of the outer wall of the first positioning cylinder through the mounting through hole, then the second positioning cylinder is moved along the end rod, so that the second positioning cylinder slides along the outer wall of the first positioning cylinder until the second positioning cylinder is completely sleeved on the first positioning cylinder, in the process of sleeving the second positioning cylinder on the first positioning cylinder, the positioning block in the mounting through hole on the side wall of the first positioning cylinder is pressed by the inner wall of the second positioning cylinder to press the outer wall of the end rod, and the positioning block is pressed between the inner wall of the second positioning cylinder and the outer wall of the end rod in a transition fit manner, and is tightly clamped and locked through a plurality of positioning blocks annularly arranged along the circumferential direction of the end rod. The first positioning cylinder, the movable positioning block and the second positioning cylinder are matched with each other, so that the locking effect is realized through a simple linear sliding effect, and the operation is convenient;
2. according to the invention, the positioning blocks with isosceles trapezoid plate-shaped structures are adopted, the movable connection in the mounting through holes is realized through the rotating shaft, so that the first positioning cylinder is prevented from generating a blocking effect when moving along the end rod, and the second positioning cylinder is conveniently and directly sleeved to realize locking operation. The second positioning cylinder can be sleeved on the first positioning cylinder along the direction from the top to the bottom of the isosceles trapezoid, so that the force is applied gradually, and the resistance is reduced;
3. if the positioning block with the isosceles trapezoid structure is directly adopted, the positioning block is in line contact with the inner wall of the second positioning cylinder and the outer wall of the end rod, so that the contact area is small, and the inner wall of the second positioning cylinder and the end rod are easy to damage; therefore, the planes which are in contact with the inner wall of the second positioning cylinder and the outer wall of the end rod are arranged at the positions, close to the outer edges of the bottom edges, of the inner side and the outer side of the inner side of the positioning block, the bottoms of the two sides of the positioning block are in surface contact with the inner wall of the second positioning cylinder and the outer wall of the end rod, the contact area is increased, and the structural connection stability is improved. The corrugated teeth can be arranged on the outer edge plane of the inner side edge of the positioning block close to the bottom edge, and the corrugated teeth are arranged on the outer wall of the end rod, so that the friction resistance when the locking and fixing is increased through the mutual engagement and contact of the corrugated teeth, and the firmness of the locking structure is improved;
4. in the invention, if the inner wall of the second sleeve is in long-term rigid contact sliding with the positioning block, the structure is easy to be damaged and the operation is inconvenient; therefore, the outer bottom edge of the positioning block is flexibly contacted with the inner wall of the second positioning cylinder through the rubber pad, so that the friction resistance is increased, the mechanical external force is conveniently applied to push the second positioning cylinder to be quickly sleeved on the first positioning cylinder, and the protection structure is not damaged. After the second positioning cylinder is completely sleeved on the first positioning cylinder, a rubber pad part on the outer edge plane of the outer side of the positioning block is just embedded into the positioning groove, so that the second positioning cylinder is locked to a certain extent, and the first positioning cylinder and the second positioning cylinder are limited to axially and relatively slide;
5. the invention comprises a main body mechanism of a force transmission frame, wherein a top ring plate, a bottom ring plate and a supporting plate, and then a plurality of auxiliary supporting rods can be slidably arranged between the top ring plate and the bottom ring plate by arranging sliding tracks on the opposite plate surfaces of the top ring plate and the bottom ring plate in a ring manner, and the auxiliary supporting rods are slidably arranged in the tensioning process of the prestressed reinforcement of the jack, so that the auxiliary supporting rods are uniformly dispersed at equal intervals and are used for dispersing supporting acting force of the supporting plate to play a role of auxiliary supporting; after the tension of the tension rod reaches a designed force value, the auxiliary supporting rods are slid, so that the distance between any two adjacent supporting rods is increased, and enough space is provided for workers to operate the first positioning cylinder and the second positioning cylinder.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic view of the overall mounting structure of the present invention;
FIG. 2 is a schematic perspective view of a locking member according to the present invention;
FIG. 3 is a schematic axial cross-sectional view of a retaining member according to the present invention;
FIG. 4 is a schematic view of a partial structure of an inner wall of a second positioning cylinder according to the present invention;
fig. 5 is a schematic view of the three-dimensional structure of the force transmission frame of the present invention.
In the drawings, the reference numerals and corresponding part names: 1-jack mechanism, 2-force transmission frame, 201-top ring plate, 202-bottom ring plate, 203-supporting plate, 204-sliding rail, 205-auxiliary supporting rod, 3-pull rod, 4-end rod, 5-prestressed reinforcement, 6-locking piece, 601-first positioning cylinder, 602-second positioning cylinder, 603-mounting through hole, 604-positioning block, 605-fixed shaft, 606-rubber pad, 607-positioning groove, 608-first limiting ring plate, 609-positioning column, 610-second limiting ring plate, 611-waist-shaped hole, 612-nut, 613-cover plate, 614-through hole, 615-rubber inverted tooth, 7-connector, 8-pre-buried iron plate and 9-concrete member.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention. As shown in fig. 1-5:
example 1
The embodiment provides a prestressing tendons stretching structure for prestressing force floor, including jack mechanism 1 and biography power frame 2, jack 1 includes structures such as master cylinder, master cylinder piston, inlet port, return cylinder, return oil piston, oil gallery, and the flexible end of jack mechanism 1 sets up pull rod 3, and pull rod 3 passes through connector 7 and is connected with end pole 4, and the free end and the prestressing force bar 5 of end pole 4 are connected. The end rod 4 is sleeved with a locking piece 6, and the locking piece 6 comprises a first positioning cylinder 601 and a second positioning cylinder 602; the first positioning cylinder 601 is sleeved on the end rod 4 in a clearance fit manner, six linear mounting through holes 603 are formed in the side wall of the first positioning cylinder 601, and positioning blocks 604 are movably arranged in the mounting through holes 603; the second positioning cylinder 602 is sleeved on the outer wall of the first positioning cylinder 601 in a clearance fit manner, and meanwhile, the inner wall of the second positioning cylinder 602 presses the positioning block 604 to the outer wall of the end rod 4, so that the positioning block 604 is in pressing contact with the outer wall of the end rod 4.
Example 2
Further improvement on the basis of embodiment 1, the positioning block 604 is in an isosceles trapezoid structure along the axis direction, the plate surface direction of the positioning block 604 of the isosceles trapezoid structure is perpendicular to the side wall surface of the first positioning cylinder 601, the top of the isosceles trapezoid structure is rotationally connected with the inner wall of the mounting through hole 603 through the fixing shaft 605, and the rotation direction of the positioning block 604 is perpendicular to the plate surface direction of the positioning block 604. The inner and outer sides of the positioning block 604 are provided with planes which are contacted with the inner wall of the second positioning cylinder 602 and the outer wall of the end rod 4 near the outer edge of the bottom edge.
Example 3
Further improvements to embodiment 2 include the provision of intermeshing corrugated teeth on the inner edge of the locating block 604 near the bottom edge and on the outer wall of the end bar 4. A rubber pad 606 is arranged on the outer edge plane of the outer side edge of the positioning block 604 near the bottom edge, and the rubber pad 606 is in transition fit contact with the inner wall of the second positioning cylinder 602. The inner wall of the second positioning cylinder 602 is provided with a plurality of wedge-shaped positioning grooves 607, the depth of the positioning grooves 607 is gradually increased along the direction that the second positioning cylinder 602 is sleeved on the first positioning cylinder 601 in a sliding manner, and the outer edge part of a rubber pad 606 at the bottom of the outer side wall of the positioning block 604 is embedded into the deepest part of the positioning grooves 607 to be fixed.
Example 4
Further improvement on the basis of the embodiment 3, a first limiting ring plate 608 is circumferentially arranged on the outer wall of one end of the first positioning cylinder 601, which is close to the prestressed reinforcement 5, and a plurality of thread positioning columns 609 are convexly arranged on the upper plate surface of the first limiting ring plate 608; the second positioning cylinder 602 is provided with a second limiting ring plate 610 on the outer wall of one end close to the first positioning cylinder 601, the second limiting ring plate 610 is provided with a plurality of waist-shaped holes 611 for penetrating the positioning columns 609, and the positioning columns 609 are locked and fixed through nuts 612.
Example 5
Further improvement on the basis of embodiment 4, a cover plate 613 is integrally arranged at the end part of the second positioning cylinder 602 far away from the first positioning cylinder 601, a through hole 614 for passing through the end rod 4 in a clearance fit manner is formed in the cover plate 613, and rubber inverted teeth 615 are arranged on the inner wall of the through hole 614.
Example 6
Further improvement on the basis of the embodiment 5, the force transmission frame 2 comprises a top ring plate 201 and a bottom ring plate 202, and two fixed support plates 203 are symmetrically arranged between the top ring plate 201 and the bottom ring plate 202; the top ring plate 201 and the bottom ring plate 202 are also provided with sliding tracks 204 in a surrounding manner, the force transmission frame 2 further comprises two auxiliary supporting rods 205, and sliding wheels which are respectively arranged on the sliding tracks 204 on the top ring plate 201 and the bottom ring plate 202 at the two axial ends of the auxiliary supporting rods 205. The auxiliary supporting rod 205 has a spindle-shaped columnar structure.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, and it should be understood that the foregoing is by way of illustration and example only, and is not intended to limit the scope of the invention.
Claims (10)
1. The prestress rib stretching structure for the prestress floor slab comprises a jack mechanism (1) and a force transmission frame (2), wherein the telescopic end of the jack mechanism (1) is connected with a prestress rib (5) through a pull rod (3) and an end rod (4) in sequence, and the prestress rib stretching structure is characterized in that a locking piece (6) is sleeved on the end rod (4), and the locking piece (6) comprises a first positioning cylinder (601) and a second positioning cylinder (602); the first positioning cylinder (601) is sleeved on the end rod (4) in a clearance fit manner, a plurality of mounting through holes (603) are formed in the side wall of the first positioning cylinder (601), and positioning blocks (604) are movably arranged in the mounting through holes (603); the second positioning cylinder (602) is sleeved on the outer wall of the first positioning cylinder (601), and meanwhile the positioning block (604) is pressed towards the outer wall of the end rod (4) to enable the positioning block (604) to be in pressing contact with the outer wall of the end rod (4).
2. The prestressed tendon stretching structure for prestressed floor according to claim 1, wherein the positioning block (604) is in an isosceles trapezoid structure along the axial direction, the plate direction of the positioning block (604) of the isosceles trapezoid structure is perpendicular to the side wall surface of the first positioning cylinder (601), the top of the isosceles trapezoid structure is rotatably connected with the inner wall of the mounting through hole (603) through the fixing shaft (605), and the rotation direction of the positioning block (604) is perpendicular to the plate direction of the positioning block (604).
3. The prestressed tendon stretching structure for prestressed floor according to claim 2, wherein the inner and outer sides of the positioning block (604) are provided with planes contacting the inner wall of the second positioning cylinder (602) and the outer wall of the end rod (4) near the outer edge of the bottom edge.
4. A tendon stretching structure for a prestressed floor as claimed in claim 3, characterized in that the inner side of the positioning block (604) is provided with mutually engaged corrugated teeth near the outer edge plane of the bottom side and the outer wall of the end rod (4).
5. A tendon stretching structure for a prestressed floor according to claim 3, wherein a rubber pad (606) is arranged on the outer edge plane of the outer side edge of the positioning block (604) close to the bottom edge, and the rubber pad (606) is in transition fit contact with the inner wall of the second positioning cylinder (602).
6. The prestressed tendon stretching structure for prestressed floor as claimed in claim 5, wherein a plurality of wedge-shaped positioning grooves (607) are formed in the inner wall of the second positioning cylinder (602), the second positioning cylinder (602) is slidably sleeved on the first positioning cylinder (601) along the direction of the second positioning cylinder, the depth of the positioning grooves (607) is gradually increased, and the outer edge part of the rubber pad (606) at the bottom of the outer side wall of the positioning block (604) is embedded into the deepest part of the positioning grooves (607) to be fixed.
7. The prestressed reinforcement stretching structure for the prestressed floor according to claim 1, wherein a first limiting ring plate (608) is circumferentially arranged on the outer wall of one end of the first positioning cylinder (601) close to the prestressed reinforcement (5), and a plurality of thread positioning columns (609) are convexly arranged on the upper plate surface of the first limiting ring plate (608); a second limiting ring plate (610) is arranged on the second positioning cylinder (602) near the outer wall of one end of the first positioning cylinder (601), a plurality of waist-shaped holes (611) used for penetrating the positioning columns (609) are formed in the second limiting ring plate (610), and the positioning columns (609) are locked and fixed through nuts (612).
8. The prestressed tendon stretching structure for the prestressed floor according to claim 1, wherein the end portion of the second positioning cylinder (602) far away from the first positioning cylinder (601) is integrally provided with a cover plate (613), the cover plate (613) is provided with a through hole (614) for passing through the end rod (4) in a clearance fit manner, and the inner wall of the through hole (614) is provided with rubber inverted teeth (615).
9. The prestressed tendon stretching structure for prestressed floor slab according to claim 1, wherein said force transmission frame (2) includes a top ring plate (201) and a bottom ring plate (202), and two fixing support plates (203) are symmetrically disposed between the top ring plate (201) and the bottom ring plate (202); the top ring plate (201) and the bottom ring plate (202) are provided with sliding tracks (204) in a surrounding manner on the opposite plate surfaces, the force transmission frame (2) further comprises a plurality of auxiliary supporting rods (205), and sliding wheels with the sliding tracks (204) on the top ring plate (201) and the bottom ring plate (202) are respectively arranged at two axial ends of each auxiliary supporting rod (205).
10. A tendon stretching structure for a prestressed floor as claimed in claim 9, characterized in that said auxiliary supporting bar (205) has a spindle-like columnar structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810909027.0A CN109093839B (en) | 2018-08-10 | 2018-08-10 | Prestressed rib stretching structure for prestressed floor slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810909027.0A CN109093839B (en) | 2018-08-10 | 2018-08-10 | Prestressed rib stretching structure for prestressed floor slab |
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| Publication Number | Publication Date |
|---|---|
| CN109093839A CN109093839A (en) | 2018-12-28 |
| CN109093839B true CN109093839B (en) | 2024-02-27 |
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| CN201810909027.0A Active CN109093839B (en) | 2018-08-10 | 2018-08-10 | Prestressed rib stretching structure for prestressed floor slab |
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| CN114607671A (en) * | 2022-03-10 | 2022-06-10 | 江阴市千里马电工材料有限公司 | Intelligent maintenance platform for hydraulic cylinder of pull rod |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009279758A (en) * | 2008-05-19 | 2009-12-03 | Ps Mitsubishi Construction Co Ltd | Method for producing pretension pc member |
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| CN205835649U (en) * | 2016-07-04 | 2016-12-28 | 黄石华齐自动化设备有限公司 | Full-automatic deformed bar tensioning equipment |
| CN208668979U (en) * | 2018-08-10 | 2019-03-29 | 中国华西企业股份有限公司 | Tensioning equipment for pre-stress floor |
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2018
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| JP2009279758A (en) * | 2008-05-19 | 2009-12-03 | Ps Mitsubishi Construction Co Ltd | Method for producing pretension pc member |
| CN101967885A (en) * | 2010-09-26 | 2011-02-09 | 北京华泰天成科技发展有限公司 | Prestressed reinforcing steel tensioning equipment |
| US9315998B1 (en) * | 2011-02-14 | 2016-04-19 | Aral Wilson LLC | Cable lock-off block for repairing a plurality of post-tensioned tendons |
| CN203097301U (en) * | 2013-01-15 | 2013-07-31 | 柳州欧维姆机械股份有限公司 | Prestressed tendon tensioning pre-tensioning device |
| CN104894974A (en) * | 2015-04-16 | 2015-09-09 | 福州大学 | Prestressed tendon tensioning device and use method of prestressed tendon tensioning device |
| CN205835649U (en) * | 2016-07-04 | 2016-12-28 | 黄石华齐自动化设备有限公司 | Full-automatic deformed bar tensioning equipment |
| CN208668979U (en) * | 2018-08-10 | 2019-03-29 | 中国华西企业股份有限公司 | Tensioning equipment for pre-stress floor |
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| CN109093839A (en) | 2018-12-28 |
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