CN213290764U - Steel strand stretching device for precast beam production - Google Patents
Steel strand stretching device for precast beam production Download PDFInfo
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- CN213290764U CN213290764U CN202021640535.2U CN202021640535U CN213290764U CN 213290764 U CN213290764 U CN 213290764U CN 202021640535 U CN202021640535 U CN 202021640535U CN 213290764 U CN213290764 U CN 213290764U
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- cross beam
- steel strand
- movable cross
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Abstract
The application relates to a device for producing a precast beam, in particular to a steel strand stretching device for producing a precast beam, which comprises a fixed cross beam, a movable cross beam, a threaded pull rod, a hydraulic cylinder, a threaded sleeve and a nut. The fixed cross beam is arranged at one end of the steel strand of the precast beam, the movable cross beam is arranged on one side of the fixed cross beam away from the steel strand in parallel, and the threaded pull rods are provided with a plurality of threads which are mutually parallel and penetrate through the fixed cross beam and the movable cross beam and are in sliding connection with the movable cross beam. The threaded sleeve is connected to one end, close to the steel strand, of the threaded pull rod, the nut is connected to the threaded pull rod and located on one side, far away from the steel strand, of the movable cross beam, the hydraulic cylinder is arranged between the fixed cross beam and the movable cross beam, the cylinder body is connected with the fixed cross beam, the piston rod is in contact with the movable cross beam, a base plate capable of moving up and down is arranged on the movable cross beam at the position where the piston rod is in contact with the movable cross beam, the distance between the hydraulic cylinder and the thrust action point of the steel strand to the movable cross beam is shortened.
Description
Technical Field
The application relates to a device of precast beam production, especially relates to a steel strand wires stretching device is used in precast beam production.
Background
When the precast beam is produced, in order to improve the crack resistance of the concrete member and avoid the early occurrence of cracks of the concrete member, stress is applied to the concrete member in advance in the precast process of the concrete member so as to improve the performance of the member. The method in which the steel strands are tensioned before the concrete is poured is called a pretensioned method.
Referring to fig. 1, a steel strand stretching device commonly used in the prior pretensioning method comprises a fixed cross beam 1, a movable cross beam 2, a threaded pull rod 3, a hydraulic cylinder 4, a threaded sleeve 5 and a nut 6, wherein the fixed cross beam 1 is arranged at one end of a steel strand 7 of a precast beam, the movable cross beam 2 is arranged on one side of the fixed cross beam 1, which is far away from the steel strand 7, in parallel, and the movable cross beam 2 can move along the length direction of the steel strand 7 relative to the fixed cross beam 1. The threaded pull rod 3 is provided with a plurality of threads which are parallel to each other, is fixedly connected to the fixed cross beam 1 and penetrates through the movable cross beam 2 to be connected with the movable cross beam 2 in a sliding manner, the hydraulic cylinder 4 is arranged between the fixed cross beam 1 and the movable cross beam 2, the cylinder body 42 of the hydraulic cylinder 4 is connected with the fixed cross beam 1, and the piston rod 41 is in contact with the movable cross beam 2. The threaded sleeve 5 is in threaded connection with one end, close to the steel strand 7, of the threaded pull rod 3, and the nut 6 is in threaded connection with the threaded pull rod 3 and located on one side, far away from the steel strand 7, of the movable cross beam 2. During operation, the one end that threaded pull rod 3 is close to steel strand wires 7 is connected with steel strand wires 7 with threaded sleeve 5, twists nut 6, makes nut 6 and movable cross beam 2 keep away from the one side contact of steel strand wires 7, starts hydraulic cylinder 4, and hydraulic cylinder 4 promotes movable cross beam 2 to the one side of keeping away from fixed cross beam 1, because the limiting displacement of nut 6 for threaded pull rod 3 is to keeping away from one side pulling steel strand wires 7 of fixed cross beam 1, finally makes steel strand wires 7 obtain tensile.
In view of the above-mentioned related art, the inventor believes that when the steel strand is stretched, the movable cross beam is subjected to the acting force of the hydraulic cylinder and the acting force of the pull rod, and the directions of the two acting forces are opposite. When the steel strand is fixed above the hydraulic cylinder, the vertical distance of the two acting forces is larger, and the movable cross beam can turn towards one side close to the hydraulic cylinder by taking the upper end point of the hydraulic cylinder as a fulcrum; when the steel strand wires are fixed below the hydraulic cylinder, the vertical distance between the two acting forces is large, and the movable cross beam can turn towards one side far away from the hydraulic cylinder by taking the lower end point of the hydraulic cylinder as a fulcrum. The movable cross beam can cause the steel strand to bend when being laterally turned, and the steel strand cannot be stretched continuously.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the action point distance of the hydraulic cylinder and the steel strand to the tension of the movable cross beam is too large to cause the movable cross beam to turn on one's side, the application provides a steel strand stretching device for producing a precast beam.
The application provides a pair of steel strand wires stretching device for precast beam production adopts following technical scheme:
the utility model provides a precast beam production is with steel strand wires stretching device, includes fixed cross beam, movable cross beam, screw thread pull rod, pneumatic cylinder, screw thread sleeve and nut, and fixed cross beam sets up the one end at the steel strand wires of precast beam, and movable cross beam parallel arrangement keeps away from one side of steel strand wires at fixed cross beam, and the screw thread pull rod is provided with many and is parallel to each other and passes fixed cross beam and movable cross beam, is sliding connection with movable cross beam. Threaded sleeve threaded connection is in the one end that the threaded pull rod is close to the steel strand wires, nut threaded connection is on the threaded pull rod and is located movable cross beam and keeps away from one side of steel strand wires, and the pneumatic cylinder setting is between fixed cross beam and movable cross beam, and the cylinder body and the fixed cross beam of pneumatic cylinder are connected, and the piston rod contacts with movable cross beam, and movable cross beam is close to fixed cross beam one side and is provided with the backing plate, and the backing plate setting is in the position of piston rod and movable cross beam contact, and the backing plate can reciprocate.
Through adopting above-mentioned technical scheme, the device during operation screw thread pull rod is connected with the steel strand wires for the screw thread sleeve near the one end of steel strand wires, and the nut is kept away from one side contact of steel strand wires with movable cross beam, starts the pneumatic cylinder and makes the pneumatic cylinder promote movable cross beam to the one side of keeping away from fixed cross beam, because the limiting displacement of nut for the screw thread pull rod is to keeping away from one side pulling steel strand wires of fixed cross beam. When the steel strand is fixed above the hydraulic cylinder, the base plate is arranged at the upper end of the hydraulic cylinder, so that the action point of the thrust of the hydraulic cylinder on the movable cross beam moves upwards, the vertical distance between the two action forces is shortened, the phenomenon that the movable cross beam turns to one side close to the hydraulic cylinder is reduced, and the steel strand can be normally stretched; when the steel strand wires are fixed below the hydraulic cylinder, the base plate is arranged at the lower end of the hydraulic cylinder, so that the action point of the thrust of the hydraulic cylinder on the movable cross beam moves downwards, the vertical distance between two action forces is shortened, the phenomenon that the movable cross beam overturns towards one side far away from the hydraulic cylinder is reduced, and the steel strand wires can be normally stretched.
The utility model discloses further set up to: the movable cross beam is provided with a sliding groove on one side close to the fixed cross beam, the sliding groove is provided with vertical components positioned on two sides of the center of the hydraulic cylinder, the base plate is connected with the sliding groove in a sliding mode, and the base plate is provided with a positioning piece for fixing the base plate.
By adopting the technical scheme, the base plate is connected in the sliding groove in a sliding manner, and when the steel strand is fixed above the hydraulic cylinder, the base plate is slid to the position above the hydraulic cylinder and is fixed by the positioning piece; when the steel strand is fixed below the hydraulic cylinder, the base plate slides to a position which is lower than the hydraulic cylinder and is fixed by a positioning piece; when the steel strand is fixed in the middle of the hydraulic cylinder, the base plate can be separated from the movable cross beam. Therefore, the base plate can be reasonably utilized according to the actual working condition.
The utility model discloses further set up to: the positioning piece adopts a countersunk head bolt, a threaded hole is formed in the middle of the base plate, and the countersunk head bolt is connected with the threaded hole and can be abutted against the movable cross beam.
By adopting the technical scheme, the countersunk head bolt penetrates through the threaded hole on the base plate to fix the position of the base plate, so that the phenomenon that the base plate slides to the position below the movable cross beam under the action of gravity is reduced; the countersunk head bolt can sink to the lower part of the plane of the backing plate, so that the surface of the backing plate can be kept flat, and the phenomenon of uneven stress of the movable cross beam caused by uneven surface of the backing plate is reduced.
The utility model discloses further set up to: the threaded pull rods are divided into two groups, one group penetrates through the fixed cross beam, the other group penetrates through the movable cross beam in a sliding mode, threaded sleeves are connected to the two ends of the threaded pull rods penetrating through the fixed cross beam in a threaded mode, and the threaded sleeves at the two ends can be respectively connected with the steel strands and the other group of threaded pull rods
Through adopting above-mentioned technical scheme, two sets of screw thread pull rods can be with screw thread sleeve interconnect, also can alternate segregation, and two sets of screw thread pull rod separations can be so that fixed cross beam and movable cross beam separation, have reduced and have stacked the volume.
The utility model discloses further set up to: and the two hydraulic cylinders are respectively connected with a pressure gauge.
Through adopting above-mentioned technical scheme for the staff can know the thrust size that the pneumatic cylinder produced the movable beam clearly, makes the prestressing force that the steel strand wires received within reasonable scope.
The utility model discloses further set up to: through holes are formed in the positions, through which the threaded pull rods penetrate, of the fixed cross beam and the movable cross beam, baffle plates are arranged on one sides, far away from the steel strands, of the fixed cross beam and the movable cross beam, and threading holes for the threaded pull rods to penetrate are formed in the positions, corresponding to the through holes, of the baffle plates.
Through adopting above-mentioned technical scheme, set up the through wires hole on the baffle, the screw thread pull rod passes the through wires hole and is connected with the steel strand wires, has reduced the phenomenon that the steel strand wires take place to reciprocate at tensile in-process.
The utility model discloses further set up to: threaded holes are formed in the baffle plate along the vertical direction, the lead screw penetrates through the threaded holes to be in threaded connection with the baffle plate, and the lead screw is in rotating connection with the fixed cross beam and the movable cross beam.
Through adopting above-mentioned technical scheme, rotate the lead screw and can drive the baffle up-and-down motion, can adjust the baffle according to the high position of steel strand wires for through-hole and steel strand wires on the baffle are in same horizontal position, can keep the level when steel strand wires stretch, reduce the crooked phenomenon of steel strand wires.
The utility model discloses further set up to: the lower part of the movable cross beam is provided with a slide rail which is vertical to the length direction of the fixed cross beam.
Through adopting above-mentioned technical scheme for can remove on the slide rail when the movable cross beam receives thrust, the friction between slide rail and the movable cross beam is littleer than the friction between slide rail and the mill ground, the removal of the movable cross beam of being convenient for.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the pad plate is arranged at the contact position of the hydraulic cylinder and the movable cross beam, and is arranged at the upper end or the lower end of the hydraulic cylinder according to the fixed position of the steel strand, so that the action point of the hydraulic cylinder on the thrust of the movable cross beam is closer to the action point of the steel strand on the thrust of the movable cross beam, the phenomenon of side turning of the movable cross beam is reduced, and the steel strand can be kept horizontally and normally stretched;
2. the hydraulic cylinder is connected with the pressure gauge, so that the worker can clearly know the magnitude of the thrust generated by the hydraulic cylinder on the movable cross beam, and the prestress received by the steel strand is in a reasonable range.
Drawings
FIG. 1 is a schematic plan view of a prior art construction;
FIG. 2 is a schematic perspective view of the present application in an operating state;
FIG. 3 is a partial schematic view of the present application, showing primarily the structure of the hydraulic cylinder and movable beam contact portion;
FIG. 4 is a partial schematic view of the present application, showing primarily the structure of the baffles on the beam.
Description of reference numerals: 1. fixing the cross beam; 2. a movable cross beam; 3. a threaded pull rod; 4. a hydraulic cylinder; 41. a piston rod; 42. a cylinder body; 5. a threaded sleeve; 6. a nut; 7. steel strand wires; 8. a pressure gauge; 9. a motor; 10. a base plate; 11. a chute; 12. a threaded hole; 13. a positioning member; 14. a through hole; 15. a baffle plate; 16. threading holes; 17. a lead screw; 18. a hand wheel; 19. a slide rail; 20. a handle.
Detailed Description
The present application is described in further detail below with reference to figures 2-4.
The embodiment of the application discloses steel strand stretching device is used in precast beam production.
Referring to fig. 2, this stretching device includes fixed cross beam 1, movable cross beam 2, screw thread pull rod 3, pneumatic cylinder 4, threaded sleeve 5 and nut 6, fixed cross beam 1 and movable cross beam 2 all are the cuboid setting, and fixed cross beam 1 is longer than movable cross beam 2, fixed cross beam 1 sets up the one end at the steel strand wires 7 of precast beam, movable cross beam 2 parallel arrangement keeps away from one side of steel strand wires 7 at fixed cross beam 1, be convenient for movable cross beam 2's removal in order to reduce friction, movable cross beam 2 below has set up perpendicular to fixed cross beam 1 length direction's slide rail 19, movable cross beam 2 receives to promote after can remove on slide rail 19.
The threaded pull rods 3 are arranged in a plurality of parallel and divided into two groups, one group penetrates through the fixed cross beam 1, and the other group penetrates through the movable cross beam 2 in a sliding mode. The two ends of the threaded pull rod 3 penetrating through the fixed cross beam 1 are connected with threaded sleeves 5, the threaded sleeve 5 close to one end of the steel strand 7 can be connected with the steel strand 7, and the thread close to one end of the movable cross beam 2 can be connected with the threaded pull rod 3 penetrating through the movable cross beam 2. The two groups of threaded pull rods 3 are separated from each other, so that the fixed cross beam 1 and the movable cross beam 2 can be separated.
The threaded pull rod 3 penetrating through the movable cross beam 2 is connected with a nut 6, and the nut 6 is positioned on one side of the movable cross beam 2 far away from the steel strand 7. Screwing the nut 6 can fix the threaded pull rod 3 on one side of the movable cross beam 2 far away from the steel strand 7, and when the movable cross beam 2 is pushed to move on the slide rail 19, the limiting effect of the nut 6 enables the threaded pull rod 3 to pull the steel strand 7 towards one side far away from the fixed cross beam 1.
Referring to fig. 3, the movable beam 2 is provided with a chute 11 in the vertical direction at a position contacting the hydraulic cylinder 4, the chute 11 penetrates the center of the hydraulic cylinder 4 in the length direction, a pad 10 is connected with the chute 11 in a sliding manner, and the pad 10 can move up and down on one side of the movable beam 2 along the chute 11. A positioning member 13 is additionally provided to fix the position of the pad 10, and a countersunk bolt is selected as the positioning member 13. A threaded hole 12 is provided in the middle of the shim plate 10, and a countersunk bolt is connected to the threaded hole 12 and can abut against the movable cross beam 2.
Referring to fig. 4, through holes 14 are formed in the positions, through which the threaded pull rods 3 penetrate, of the fixed cross beam 1 and the movable cross beam 2, the through holes 14 are rectangular, and the threaded pull rods 3 can move up and down in the through holes 14. The fixed cross beam 1 and the movable cross beam 2 are both provided with a baffle 15 at one side far away from the steel strand 7, and the baffle 15 is provided with a threading hole 16 corresponding to the through hole 14 for the threaded pull rod 3 to pass through. The through hole 14 is provided at both sides thereof with slide grooves 11, and the baffle 15 has a slider slidably coupled to the slide grooves 11 so that the baffle can move along the slide grooves 11. Threaded holes 12 are formed in the baffle 15, the lead screw 17 penetrates through the threaded holes 12 to be in threaded connection with the baffle 15, two ends of the lead screw 17 are rotatably connected with the fixed cross beam 1 and the movable cross beam 2, and a hand wheel 18 convenient to operate is further arranged at the top end of the lead screw 17.
The implementation principle of the embodiment is as follows:
before the device stretches the steel strand 7, the threaded pull rod 3 penetrates through the through hole 14 and the threading hole 16 in the baffle 15, the hand wheel 18 above the lead screw 17 is rotated, the hand wheel 18 drives the lead screw 17 to rotate, the threading hole 16 in the baffle 15 is adjusted to the height same as that of the steel strand 7, and then the countersunk head bolt is screwed in to fix the position of the baffle 15. The threaded pull rod 3 passes through the fixed threading hole 16, so that the phenomenon of vertical displacement in the stretching process is reduced; meanwhile, the height-adjustable baffle 15, the threaded pull rod 3 and the steel strand 7 are in the same horizontal position, and the phenomenon that the steel strand 7 is bent in the stretching process is reduced.
One end of the threaded pull rod 3 penetrating through the fixed cross beam 1, which is close to the steel strand 7, is connected with the steel strand 7 through the threaded sleeve 5, the other end of the threaded pull rod 3 penetrating through the movable cross beam 2 is connected with the threaded sleeve 5, so that the steel strand 7 and the two groups of threaded pull rods 3 are connected into a whole, and finally the threaded pull rod 3 penetrating through the movable cross beam 2 is fixed on one side, far away from the steel strand 7, of the movable cross beam 2 through the nut 6.
When the device is stretching steel strand wires 7, start hydraulic cylinder 4, hydraulic cylinder 4 promotes movable cross beam 2 to the direction of keeping away from fixed cross beam 1, and the pull rod between fixed cross beam 1 and the movable cross beam 2 can receive the pulling force that movable cross beam 2 motion produced, and nut 6 has limiting displacement for screw thread pull rod 3 is to keeping away from one side pulling steel strand wires 7 of fixed cross beam 1, finally makes steel strand wires 7 stretched.
The position of pneumatic cylinder 4 and the contact of movable cross beam 2 has set up backing plate 10, when fixing of steel strand wires 7 in the top of pneumatic cylinder 4, available countersunk bolt fixes backing plate 10 in the upper end of pneumatic cylinder 4, make pneumatic cylinder 4 shift up to movable cross beam 2 thrust action point, steel strand wires 7 are unchangeable to movable cross beam 2's pulling force action point, the vertical distance of two action points shortens, the phenomenon of movable cross beam 2 to being close to the upset of pneumatic cylinder 4 one side has been reduced, make steel strand wires 7 keep the level to obtain normal tensile.
When steel strand wires 7 are fixed in pneumatic cylinder 4 below, along spout 11 gliding backing plate 10, fix backing plate 10 at the lower extreme of pneumatic cylinder 4 with the countersunk bolt for pneumatic cylinder 4 moves down to the effect point of 2 thrust of movable cross beam, and steel strand wires 7 is unchangeable to the pulling force effect point of movable cross beam 2, and the vertical distance of two effect points shortens, has reduced movable cross beam 2 to keeping away from the phenomenon of 4 one side upsets of pneumatic cylinder, makes steel strand wires 7 keep the level to obtain normal tensile.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a precast beam production is with steel strand wires stretching device which characterized in that: comprises a fixed cross beam (1), a movable cross beam (2), a threaded pull rod (3), a hydraulic cylinder (4), a threaded sleeve (5) and a nut (6), wherein the fixed cross beam (1) is arranged at one end of a steel strand (7) of a precast beam, the movable cross beam (2) is arranged at one side of the fixed cross beam (1) far away from the steel strand (7) in parallel, the threaded pull rod (3) is provided with a plurality of threads which are mutually parallel to penetrate through the fixed cross beam (1) and the movable cross beam (2) and are in sliding connection with the movable cross beam (2), the threaded sleeve (5) is in threaded connection with one end of the threaded pull rod (3) close to the steel strand (7), the nut (6) is in threaded connection with the threaded pull rod (3) and is positioned at one side of the movable cross beam (2) far away from the steel strand (7), the hydraulic cylinder (4) is arranged between the fixed cross beam (1) and the movable cross beam (2), a cylinder body (42, the piston rod (41) is in contact with the movable cross beam (2), one side, close to the fixed cross beam (1), of the movable cross beam (2) is provided with a base plate (10), the base plate (10) is arranged at the position where the piston rod (41) is in contact with the movable cross beam (2), and the base plate (10) can move up and down on one side of the movable cross beam (2).
2. The steel strand stretching device for producing the precast beam according to claim 1, wherein: movable beam (2) are close to fixed beam (1) one side and have seted up spout (11), spout (11) have the vertical component that is located pneumatic cylinder (4) center both sides, and backing plate (10) slide with spout (11) and are connected, are equipped with setting element (13) that are used for fixed backing plate (10) on backing plate (10).
3. The steel strand stretching device for producing the precast beam of claim 2, wherein: the positioning piece (13) is a countersunk head bolt, a threaded hole (12) is formed in the middle of the base plate (10), and the countersunk head bolt is connected with the threaded hole (12) and can be abutted against the movable cross beam (2).
4. The steel strand stretching device for producing the precast beam according to claim 3, wherein: the threaded pull rod (3) is divided into two groups, one group penetrates through the fixed cross beam (1), the other group penetrates through the movable cross beam (2) in a sliding mode, threaded sleeves (5) are connected to the two ends of the threaded pull rod (3) penetrating through the fixed cross beam (1) in a threaded mode, and the threaded sleeves (5) at the two ends can be connected with the steel strand (7) and the other group of threaded pull rod (3) respectively.
5. The steel strand stretching device for producing the precast beam according to claim 4, wherein: and the hydraulic cylinders (4) are connected with a pressure gauge (8).
6. The steel strand stretching device for producing the precast beam according to claim 5, wherein: the thread pull rod (3) penetrates through the fixed cross beam (1) and the movable cross beam (2) and is provided with a through hole (14), one side, far away from the steel strand (7), of the fixed cross beam (1) and the movable cross beam (2) is provided with a baffle (15), and a threading hole (16) for the thread pull rod (3) to penetrate is formed in the position, corresponding to the position of the through hole (14), on the baffle (15).
7. The steel strand stretching device for producing the precast beam according to claim 6, wherein: threaded holes (12) are formed in the baffle (15) along the vertical direction, the lead screw (17) penetrates through the threaded holes (12) to be in threaded connection with the baffle (15), and the lead screw (17) is in rotating connection with the fixed cross beam (1) and the movable cross beam (2).
8. The steel strand stretching device for producing the precast beam according to claim 1, wherein: and a sliding rail (19) vertical to the length direction of the fixed cross beam (1) is arranged below the movable cross beam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021640535.2U CN213290764U (en) | 2020-08-10 | 2020-08-10 | Steel strand stretching device for precast beam production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021640535.2U CN213290764U (en) | 2020-08-10 | 2020-08-10 | Steel strand stretching device for precast beam production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213290764U true CN213290764U (en) | 2021-05-28 |
Family
ID=76023915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021640535.2U Expired - Fee Related CN213290764U (en) | 2020-08-10 | 2020-08-10 | Steel strand stretching device for precast beam production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213290764U (en) |
-
2020
- 2020-08-10 CN CN202021640535.2U patent/CN213290764U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |