CN211547382U - Jack loading and transporting device for prestress tensioning of cast-in-situ box girder - Google Patents
Jack loading and transporting device for prestress tensioning of cast-in-situ box girder Download PDFInfo
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- CN211547382U CN211547382U CN201922239052.5U CN201922239052U CN211547382U CN 211547382 U CN211547382 U CN 211547382U CN 201922239052 U CN201922239052 U CN 201922239052U CN 211547382 U CN211547382 U CN 211547382U
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Abstract
The utility model discloses a jack loading and transporting device for cast-in-place case roof beam prestressing force stretch-draw, the leading truck is provided with the main body frame of portable and brake, upper end at main body frame sets up slide and sliding assembly, directly hang the jack inside the frame, then promote main body frame and can realize transporting the jack, pin the brake truckle after transporting the assigned position, sliding assembly through being close to the girder and not setting up chain block one end transfers and adjusts the jack, shift the jack to initial sliding assembly after accomplishing case roof beam prestressing force stretch-draw on, can move the jack to next stretch-draw point after the unblock of brake truckle, whole process does not need the crane, just can accomplish the operation alone, and is showing and is improving work efficiency, and the construction cost is low.
Description
Technical Field
The utility model relates to a case roof beam prestressing force stretch-draw construction technical field. More specifically, the utility model relates to a jack loading and transporting device for cast-in-place box girder prestressing force stretch-draw.
Background
With the development of bridge construction business in China, prestress is almost applied to all bridge construction projects, in the existing cast-in-place box girder construction scheme, the box girder is large in prestress tensioning range, multiple in steel bundles and high in girder body, during tensioning, a jack is manually carried and dragged during installation and small-range movement, a crane is needed to cooperate when the jack is moved far away, the movable jack is manually installed, labor is consumed, the construction period is delayed, operation can be performed only in a small range, the efficiency is slightly improved by the aid of the crane in cooperation with the installation and movement of the jack, equipment cost is high, in the actual operation process, manual work and the crane are still needed to cooperate, generally, the movement distance is more than 40 meters once for at least 30 minutes, the middle crane needs to be used for supporting legs again, and the overall cost investment is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a jack loading and transporting device for cast-in-place box girder prestressing force stretch-draw to installation jack is efficient among the solution prior art, with high costs technical problem.
In order to achieve these objects and other advantages in accordance with the purpose of the invention, a jack loading device for prestress tensioning of a cast-in-place box girder is provided, including:
the main body frame comprises a main beam and a pair of supporting frames, the main beam is horizontally arranged, the pair of supporting frames are respectively used for fixedly supporting the main beam, the lower end of each supporting frame is provided with a brake trundle, one end of the main beam is provided with a chain block, and the symmetric centers of the pair of supporting frames are positioned between the symmetric center of the main beam and the chain block;
the slideway is arranged at the upper end of the main beam along the length direction of the main beam;
the sliding assembly comprises a pair of clamping plates, a pair of shaft rods and a roller bearing, the clamping plates are respectively positioned at two sides of the main beam, the shaft rods are respectively positioned above and below the main beam and are fixedly connected with the clamping plates, the roller bearing is fixedly sleeved on the shaft rods above the main beam and is just slidably positioned in the slideway, and at least one sliding assembly is respectively arranged between the pair of supporting frames and between one end of the main beam, which is not provided with the chain block, and the adjacent supporting frame.
Preferably, the upper end of the main beam is welded with two barrier strips along the length direction of the main beam, the slideway is formed between the two barrier strips and the upper end of the main beam between the two barrier strips, and the distance between the two barrier strips is slightly larger than the width of the roller bearing.
Preferably, one of the two support frames is arranged close to the chain block, and the other support frame is fixed at the center of the main beam.
Preferably, the number of the sliding assemblies is three, one of the sliding assemblies is located between a pair of supporting frames, the other two sliding assemblies are arranged between one end of the main beam, which is not provided with the chain block, and the adjacent supporting frame, and a connecting plate is fixed between the two sliding assemblies.
Preferably, the upper end of each support frame is provided with a distribution beam, each support frame is composed of a pair of scaffold tubes which are symmetrically and obliquely arranged, the upper end of each scaffold tube is welded and fixed at the lower end of the distribution beam, and the upper end of the distribution beam is welded and fixed on the main beam.
Preferably, steel pipes for reinforcement are connected between the scaffold pipes and between one end of the main beam, which is not provided with the chain block, and two adjacent scaffold pipes.
Preferably, the main beam is I-shaped steel, the distribution beam is angle steel, and the scaffold tube is a steel tube.
The utility model discloses at least, include following beneficial effect: the utility model discloses set up the main body frame of portable and brake, set up slide and sliding assembly in main body frame's upper end, it is direct to hang the jack inside the frame, then promote main body frame and can realize transporting the jack, transport the assigned position after pinning the brake truckle, through being close to the girder and not setting up the sliding assembly of chain block one end and transferring and adjusting the jack, shift the jack to initial sliding assembly after accomplishing case roof beam prestressing force stretch-draw on, can move the jack to next stretch-draw point after the brake truckle unblock, whole process does not need the crane, just can accomplish the operation alone, and is showing and is improving work efficiency, and construction cost is low.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
fig. 2 is a top view structural view of the main body frame of the present invention;
FIG. 3 is a right structural view of the main frame of the present invention;
fig. 4 is a right structural view of the sliding assembly of the present invention;
the specification reference numbers indicate: 1. girder, 2, chain block, 3, support frame, 4, distributor beam, 5, scaffold tube, 6, brake truckle, 7, slide, 8, blend stop, 9, slip subassembly, 10, splint, 11, axostylus axostyle, 12, gyro wheel bearing, 13, connecting plate, 14, steel pipe.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1 to 4, the utility model discloses a jack loading and transporting device for cast-in-place box girder prestressing force stretch-draw, include:
the main body frame comprises a main beam 1 and a pair of support frames 3, wherein the main beam 1 is horizontally arranged, the pair of support frames 3 are respectively used for fixedly supporting the main beam 1, brake trundles 6 are arranged at the lower ends of the support frames 3, a chain block 2 is arranged at one end of the main beam 1, and the symmetric centers of the pair of support frames 3 are positioned between the symmetric center of the main beam 1 and the chain block 2;
the slideway 7 is arranged at the upper end of the main beam 1 along the length direction of the main beam 1;
the sliding assembly 9 comprises a pair of clamping plates 10, a pair of shaft rods 11 and a roller bearing 12, the pair of clamping plates 10 are respectively positioned at two sides of the main beam, the pair of shaft rods 11 are respectively positioned above and below the main beam 1 and fixedly connected with the pair of clamping plates 10, the roller bearing 12 is fixedly sleeved on the shaft rod 11 above the main beam and just slides in the slideway 7, and at least one sliding assembly 9 is respectively arranged between the pair of supporting frames 3 and between one end of the main beam 1, which is not provided with the chain block 2, and the adjacent supporting frame 3.
Firstly, the device is arranged according to the designed positions of all parts, a main beam and two supporting frames are welded and fixed, then the lower end of a scaffold tube is provided with a brake caster, then a chain block is arranged at one end of the main beam, the upper end of the main beam is provided with a slideway, and finally at least two sliding assemblies are arranged, the rolling bearing is provided with an inner ring and an outer ring, the inner ring and the outer ring of the rolling bearing can rotate relatively, the upper shaft lever, the lower shaft lever and the clamping plate are locked by nuts, the shaft lever above the main beam is fixedly arranged on the axis of the inner ring of the rolling bearing in a penetrating way, so that the outer ring of the roller bearing rolls back and forth along the length direction of the slideway, due to the blocking effect of the support frames, the sliding assembly between the two support frames can only slide back and forth between the two support frames, and the sliding assembly between the end of the main beam, which is not provided with the chain block, and the adjacent support frame can only move back and forth between the end of the main beam, which is not provided with the chain block, and the adjacent support frame. Before the device is used, a chain block is also respectively arranged on the lower shaft lever of each sliding assembly. Two splint of slip subassembly can restrict the swing of slip subassembly at work, and the brake truckle is used for restricting the displacement of whole device, prevents that whole device from rocking in jack transition and installation.
Before box girder prestress tensioning operation, firstly, pre-burying a tie bar before box girder top plate concrete pouring, wherein the pre-buried tie bar is welded on a box girder main bar, each tensioning end needs to be pre-buried, and one tensioning end on the same vertical plane is pre-buried, so that when the device is arranged at a specified position, a pair of brake trundles close to one end of a main girder, which is not provided with a chain block, and 20cm away from the edge of the box girder are ensured to facilitate the tensioning operation of a subsequent jack; then the jack is loaded and transported to a designated position, the device is pushed right above the jack, the hand chain block on the sliding assembly positioned between the two support frames is used for hoisting the jack, then a wooden wedge is inserted in front and back of a rolling bearing of the sliding assembly to prevent the sliding back and forth, and then the device is pushed to the designated position; after the jack is transported to a designated position, a chain block on the main beam is connected and tensioned with a pre-buried tie bar for controlling the gravity center of the whole device and balancing the weight of the jack, then a wooden wedge is taken away to move a sliding assembly positioned between two supporting frames with the jack to a position close to the supporting frame at the end of the main beam where the chain block is not arranged, the chain block on the sliding assembly is used for transiting the jack to the sliding assembly positioned between the end of the main beam where the chain block is not arranged and the adjacent supporting frame, all pulley assemblies are locked by the wooden wedge when the jack is transited, and the brake trundles are all braked; then, installing and positioning a jack, performing prestress tensioning, continuously moving the sliding assembly with the jack forwards until the sliding assembly moves in front of the steel strand, adjusting the angle of the jack through a chain block to enable the steel strand to be aligned with the inner ring of the jack, then pushing the jack to the box girder direction until the steel strand is installed in place, and performing subsequent tensioning operation after a tool anchor and a tool clamping piece are installed; after tensioning is finished, the jack is shifted: the method comprises the steps of retreating a jack from an outer ring of a steel strand, lifting to a position slightly higher than a box girder top plate, moving a sliding assembly with the jack towards an adjacent support frame, locking each sliding assembly through a wooden wedge after the movement is completed, transiting the jack to a position below a pulley assembly between two support frames, removing the wooden wedge, driving the jack to move to the middle of a frame, locking the jack through the wooden wedge, unlocking a chain block connected with an embedded tie bar, moving the jack to a next tensioning point after a brake caster is unlocked, repeating the movement, and moving the jack to perform repeated tensioning operation.
Adopt the utility model discloses a jack handling device for cast-in-place box girder prestressing force stretch-draw transports the jack and carries out the stretch-draw operation, and whole process does not need the crane, just can accomplish the operation alone, can remove jack 40 meters in 1 minute, just can put the jack in place in 5 minutes alone, and construction cost is low, is showing and has improved work efficiency.
In another technical scheme, as shown in fig. 2, 3 and 4, two barrier strips 8 are welded at the upper end of the main beam 1 along the length direction of the main beam 1, the slideway 7 is formed between the two barrier strips 8 and the upper end of the main beam 1 between the two barrier strips 8, and the distance between the two barrier strips 8 is slightly larger than the width of the roller bearing 12. The stop strip can be made of smooth round steel, the stop strip is arranged to prevent the roller bearing from sliding out of the track, and the sliding assembly is simpler to mount and more convenient to dismount.
In another technical scheme, as shown in fig. 1 and 2, one of the support frames is arranged close to the chain block 2, and the other support frame 3 is fixed at the center of the main beam 1. So set up, whole device is more firm on the one hand, and the focus is easily controlled, and the efficiency that removes the jack moreover is highest, makes things convenient for the transient process of artifical war force adjustment jack.
In another technical solution, as shown in fig. 1, three sliding assemblies 9 are provided, wherein one of the sliding assemblies 9 is located between a pair of supporting frames 3, the other two sliding assemblies 9 are provided between one end of the main beam 1 where the chain block 2 is not provided and the adjacent supporting frame 3, and a connecting plate 13 is fixed between the two sliding assemblies 9. The total number of 3 sets of pulley devices is arranged, the front two sets synchronously move one jack without being limited by the angle of a tensioning end, and the angle of the jack can be more conveniently adjusted.
In another technical scheme, as shown in fig. 1, 2 and 3, a distribution beam 4 is arranged at the upper end of each support frame 3, each support frame 3 is composed of a pair of scaffold tubes 5 which are symmetrically and obliquely arranged, the upper end of each scaffold tube 5 is welded and fixed at the lower end of the distribution beam 4, and the upper end of the distribution beam 4 is welded and fixed on the main beam 1. The support frame is conveniently welded on the main beam through the distribution beam, and the angle between the scaffold tubes is easier to adjust.
In another technical scheme, as shown in fig. 1, fig. 2 and fig. 3, a steel pipe 14 for reinforcement is connected between the scaffold pipes 5 and between one end of the main beam 1, which is not provided with the chain block 2, and the adjacent support frame 3, so that the connection of each part is enhanced, and the durability of the device is improved, wherein a pair of steel pipes for reinforcement between one end of the main beam, which is not provided with the chain block, and the adjacent support frame can also play a role in blocking and limiting the sliding assembly, so as to avoid sliding out of the main beam.
In another technical scheme, as shown in fig. 1, 2 and 3, the main beam 1 is an i-beam, the distribution beam 4 is an angle steel, and the scaffold tube 5 is a steel tube, so that the whole device has stronger bearing capacity.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields suitable for the invention, and further modifications may be readily implemented by those skilled in the art, so that the invention is not limited to the specific details and figures 1, 2, 3, 4 shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (7)
1. A jack loading and transporting device for cast-in-place box girder prestressing force stretch-draw, its characterized in that includes:
the main body frame comprises a main beam and a pair of supporting frames, the main beam is horizontally arranged, the pair of supporting frames are respectively used for fixedly supporting the main beam, the lower end of each supporting frame is provided with a brake trundle, one end of the main beam is provided with a chain block, and the symmetric centers of the pair of supporting frames are positioned between the symmetric center of the main beam and the chain block;
the slideway is arranged at the upper end of the main beam along the length direction of the main beam;
the sliding assembly comprises a pair of clamping plates, a pair of shaft rods and a roller bearing, the clamping plates are respectively positioned at two sides of the main beam, the shaft rods are respectively positioned above and below the main beam and are fixedly connected with the clamping plates, the shaft rods above the main beam are fixedly arranged on the inner ring of the rolling bearing in a penetrating manner, the roller bearing is just slidably positioned in the slideway, and at least one sliding assembly is respectively arranged between the pair of supporting frames and between one end of the main beam, which is not provided with the chain block, and the adjacent supporting frame.
2. The jack loading and transporting device for prestress tensioning of a cast-in-place box girder according to claim 1, wherein two barrier strips are welded to the upper end of the main girder along the length direction of the main girder, the slide way is formed between the two barrier strips and the upper end of the main girder between the two barrier strips, and the distance between the two barrier strips is slightly larger than the width of the roller bearing.
3. The jack loading and transporting device for the prestress tensioning of the cast-in-place box girder as recited in claim 1, wherein one of the supporting frames is disposed near the chain block, and the other supporting frame is fixed at a central position of the main girder.
4. The jack loading device for prestress tensioning of a cast-in-place box girder according to claim 1, wherein the number of the sliding assemblies is three, one of the sliding assemblies is located between a pair of the supporting frames, the other two sliding assemblies are located between the end of the main girder where the chain block is not located and the adjacent supporting frame, and a connecting plate is fixed between the two sliding assemblies.
5. The jack loading and transporting device for prestress tensioning of a cast-in-place box girder as recited in claim 1, wherein a distribution girder is provided at an upper end of each support frame, each support frame is composed of a pair of scaffold tubes symmetrically and obliquely provided, an upper end of each scaffold tube is welded and fixed to a lower end of the distribution girder, and an upper end of the distribution girder is welded and fixed to the main girder.
6. The jack loading and transporting device for the prestress tensioning of the cast-in-place box girder as claimed in claim 5, wherein steel pipes for reinforcement are connected between the scaffold pipes and between one end of the main girder, which is not provided with the chain block, and two adjacent scaffold pipes.
7. The jack loading and transporting device for prestress tensioning of a cast-in-place box girder according to claim 5, wherein the main girder is I-shaped steel, the distribution girder is angle steel, and the scaffold tube is a steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922239052.5U CN211547382U (en) | 2019-12-13 | 2019-12-13 | Jack loading and transporting device for prestress tensioning of cast-in-situ box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922239052.5U CN211547382U (en) | 2019-12-13 | 2019-12-13 | Jack loading and transporting device for prestress tensioning of cast-in-situ box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211547382U true CN211547382U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922239052.5U Active CN211547382U (en) | 2019-12-13 | 2019-12-13 | Jack loading and transporting device for prestress tensioning of cast-in-situ box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211547382U (en) |
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- 2019-12-13 CN CN201922239052.5U patent/CN211547382U/en active Active
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