CN210216171U - Bridge prestressing force pretension tensioning equipment - Google Patents
Bridge prestressing force pretension tensioning equipment Download PDFInfo
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- CN210216171U CN210216171U CN201921008576.7U CN201921008576U CN210216171U CN 210216171 U CN210216171 U CN 210216171U CN 201921008576 U CN201921008576 U CN 201921008576U CN 210216171 U CN210216171 U CN 210216171U
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Abstract
The utility model discloses a bridge prestressing force pretension tensioning device, which comprises a cylinder body and steel strands, wherein movable connectors are arranged at the two ends of the cylinder body in a sliding manner, the movable connectors are fixedly connected with the steel strands, a supporting plate is arranged on the movable connectors, and the edge of the supporting plate extends out of the edge of the cylinder body; a sealing device used for isolating the end face of the cylinder body is also arranged between the movable connector and the cylinder body; the utility model replaces the thrust of the hydraulic oil by the mutual abutting acting force of the supporting plate and the concrete layer after the installation is completed, thereby ensuring the structural stability of the movable connector, avoiding the displacement of the movable connector, ensuring the tensile force of the steel strand to be always in the design range and ensuring the construction quality; simultaneously the utility model discloses need not mediate the tension force at the job site, its application method is simpler, the construction is more convenient, has improved the efficiency of construction greatly.
Description
Technical Field
The utility model relates to a bridge construction technical field, concretely relates to bridge prestressing force pretension tensioning equipment.
Background
When the bridge is used, the bridge is pressed by self load besides the pressure of the vehicles passing through the bridge deck, and the mechanical analysis shows that when the bridge deck is pressed downwards, the bottom surface of the bridge is under the action of tensile force to generate small cracks, so that the bridge deck is broken; in order to solve the problems in the prior art, steel strands are usually pre-embedded in the construction process, then the steel strands are tensioned to a set tension value, and downward pressure is counteracted through the tensioned steel strands, so that the structural stability of a bridge deck is ensured; however, the tensioning device in the prior art generally needs to assemble various components including the tapered clamping piece and the tapered jacket on site, then the steel strand is tensioned to a designed tension value range through the jack, and finally the steel strand is loosened, and the steel strand drives the tapered clamping piece to fold and abut against the tapered jacket in the rebounding process, so that the steel strand is fixed; however, the above construction method has the following disadvantages: 1. the on-site assembly and debugging procedures are complicated, the construction efficiency is low, and meanwhile, the method is not suitable for the working condition of a narrow working face; 2. the conical clamping piece can be matched with the conical jacket to fix the steel strand after moving for a certain distance, so that the stress loss of the steel strand is overlarge and even completely disappears, the design requirement cannot be met (the shrinkage of the steel strand is 6-7mm according to engineering practice), and the construction quality of the bridge is influenced.
SUMMERY OF THE UTILITY MODEL
Tensioning force to existence among the prior art is unstable, uses inconvenient defect, the utility model discloses a bridge prestressing force pretension tensioning equipment adopts tensioning equipment, tensioning equipment not only can reduce steel strand wires tensioning force's range of variation, simultaneously it need not carry out any debugging at the job site and can accomplish tensioning equipment's installation, not only greatly reduced the construction degree of difficulty, improved the efficiency of construction, the concurrent operation is simpler, convenient.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a bridge prestress pretensioning tensioning device comprises a cylinder body and a steel strand, wherein an inlet and an outlet are formed in the cylinder body, the tensioning device further comprises a movable connector, one end of the movable connector is inserted into the cylinder body in a sliding mode, a supporting plate is arranged at the other end of the movable connector, the projection of the cylinder body is located in the projection range of the supporting plate along the same direction; and a sealing device used for isolating the end face of the cylinder body is arranged between the movable connector and the cylinder body, and the elastic modulus of the sealing device is smaller than that of the concrete.
Furthermore, the sealing device is made of rubber or plastics, the sealing device is sleeved on the movable connecting head, two ends of the sealing device are respectively abutted against the end faces of the cylinder body and the supporting plate, and along the same direction, the projection of the cylinder body is positioned in the projection range of the sealing device or coincided with the projection of the sealing device.
Further, a sealing groove and a sealing block which are matched with each other are arranged between the sealing device and the cylinder body; and a sealing groove and a sealing block which are matched with each other are arranged between the sealing device and the movable connector.
Furthermore, the sealing device is made of rubber or plastics, one end of the sealing device is sleeved on the cylinder body, and the other end of the sealing device is fixedly connected with the supporting plate.
Furthermore, an integrated structure is arranged between the support plate and the movable connector, and the width of the support plate is 10-15 cm.
Furthermore, an overhaul bin is arranged on the movable connecting head, a plug is connected to one end of the overhaul bin through a screw thread, and a P anchor connected with the steel strand is arranged in the overhaul bin.
Further, an inlet and an outlet which are matched with each other are arranged between the plug and the overhaul bin, and control valves are arranged on the inlet and the outlet.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model comprises a cylinder body and a steel strand, wherein a movable connector is arranged in the cylinder body in a sliding manner, one end of the movable connector is positioned in the cylinder body and fixedly connected with the steel strand, and the other end of the movable connector extends out of the cylinder body and is provided with a supporting plate, and the cylinder body is positioned in the projection range of the supporting plate; still be provided with the sealing device who is used for sealed cylinder body terminal surface between cylinder body and movable connection head, the utility model discloses a tensioning device after pre-buried to the concrete, the backup pad contacts with the concrete, and sealing device blocks the concrete outside the cylinder body, after the concrete solidifies, discharge the high pressure oil in the cylinder body through import and export, the steel strand wires shrink and drive the movable connection head and slide, the backup pad slides under the drive of movable connection head, because the terminal surface of backup pad is supported with the concrete, it is spacing by the concrete, the movable connection head can not take place the great slip of distance, and then ensure that the steel strand wires keep the tensioning state, its tensile force can not take place great loss, and be in the design value range all the time, guarantee the normal work of tensioning device; meanwhile, the elastic modulus of the sealing device is smaller than that of the concrete, so that the sealing device can isolate the supporting plate from the cylinder body, the pressure of the supporting plate on the concrete is prevented from being transmitted to the cylinder body, the cylinder body is pressed and exploded in the pressure relief process, and the structural stability of the cylinder body is ensured; the utility model discloses a steel strand wires stretch-draw in advance, has simplified the construction process of bridge greatly, especially has more obvious effect to the stretch-draw construction of the narrow and small position in space, just the utility model discloses can also guarantee that the pulling force of steel strand wires is in the design range all the time, improved efficiency of construction and construction quality greatly.
2. The sealing device of the utility model is made of rubber or plastic, the manufacturing cost of the sealing device is reduced while the sealing effect is ensured, and the two ends of the sealing device are respectively abutted against the end surface of the cylinder body and the movable connector; along the same direction, the projection of the cylinder body is positioned in the projection range of the sealing device or is superposed with the projection of the sealing device, so that the sealing effect of the sealing device on the end face of the cylinder body is improved; because the end face of the supporting plate is simultaneously contacted with the concrete face and the sealing device, and the elastic modulus of the sealing device is smaller than that of the concrete, when the sealing device is simultaneously extruded by the supporting plate, the sealing device generates elastic yielding, the supporting plate is in hard contact with the concrete layer, and the extrusion force is transmitted to the concrete layer, so that the damage to the structural stability of the cylinder body due to the hard contact between the cylinder body and the supporting plate is avoided; meanwhile, the buffer can be realized through the sealing device, the stress on the end face of the cylinder body is further reduced, the cylinder body is guaranteed to be pressed and exploded in the pressure relief process, and the stability and the safety of the cylinder body are improved.
3. The utility model discloses a all be provided with seal groove and sealed piece between sealing device and cylinder body and the swing joint head, improve the leakproofness to the cylinder body, avoid the concrete thick liquid to enter into the slip that influences the swing joint head in the cylinder body, corrode the cylinder body simultaneously, prolong the life of cylinder body.
4. The utility model discloses a sealing device overlaps arranges the cylinder body in, and the chamber is kept apart in other end and backup pad fixed connection formation between cylinder body and backup pad to keep apart the terminal surface of cylinder body completely, realize avoiding the cylinder body terminal surface to receive the extrusion force to the sealing of cylinder body, improve the structural stability of cylinder body.
5. The utility model discloses an be integrated into one piece structure between backup pad and the swing joint head, and the width of backup pad is 10-15cm, when strengthening the joint strength of backup pad and swing joint head, reduces the atress of backup pad unit area through widening the backup pad, guarantees the structural stability of backup pad and swing joint head, and then improve equipment's structural stability and reliability.
6. The utility model discloses a swing joint is last to be provided with to overhaul the storehouse, and the screw thread connection has the end cap in overhauing the storehouse, be provided with exit on the end cap, be provided with the control valve in the exit, make things convenient for equipment fixing and control, simplify the installation procedure of equipment, it is more convenient that equipment uses.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of embodiment 2 of the present invention;
fig. 3 is a force analysis diagram of embodiment 1 of the present invention;
fig. 4 is a force analysis diagram according to embodiment 2 of the present invention;
reference numerals: 1. the device comprises a cylinder body, 2, a steel strand, 3, an inlet and an outlet, 4, a movable connector, 5, a supporting plate, 6, a sealing device, 7, a sealing groove, 8, a sealing block, 9, an overhaul bin, 10, a plug, 11, a P anchor, 12 and a control valve.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, or the position or positional relationship which is usually understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Embodiment mode 1
As a basic implementation manner of the utility model, the embodiment discloses a bridge prestress pretensioning tensioning device, the concrete structure is shown in fig. 1, and the device comprises a cylinder body 1 and a steel strand 2, two ends of the cylinder body 1 are open structures, two ends of the cylinder body 1 are both connected with a movable connector 4 through a sliding pair in a sliding manner, one end of the movable connector 4 is inserted into the cylinder body 1 in a sliding manner, the other end is positioned outside the cylinder body 1, and the movable connector 4 is fixedly connected with a support plate through welding; when the cylinder body and the supporting plate are projected along the same direction, the projection of the cylinder body is always positioned in the projection of the supporting plate, so that the supporting plate is abutted against the concrete body on the outer side of the cylinder body when in work; meanwhile, a sealing device 6 is sleeved at one end of the movable connector 4 extending out of the cylinder body 1, and the sealing device 6 is made of rubber or plastics so as to ensure that the elastic modulus of the sealing device is smaller than that of concrete; sealing grooves 7 are formed in two ends of the sealing device 6, sealing blocks 8 matched with the sealing grooves 7 are arranged on the end face of the cylinder body 1 and the end face of the supporting plate 5, and the sealing blocks 8 are inserted into the sealing grooves 7, so that the end face of the cylinder body 1 is isolated from the outside; still be provided with on the swing joint head 4 and overhaul storehouse 9, overhaul storehouse 9 internal fixation and be provided with P anchor 11, P anchor 11 and steel strand wires 2 fixed connection, the entrance point screw thread that overhauls storehouse 10 is connected with end cap 10, and end cap 10 and overhaul storehouse 9 bottom are provided with corresponding exit 3, are connected with control valve 12 on being located the exit on the end cap.
Embodiment mode 2
As another preferred embodiment of the present invention, the present invention discloses a bridge prestressed pretensioned tensioning device, as shown in fig. 2, which includes a cylinder body 1 and a steel strand 2, both ends of the cylinder body 1 are open, a movable connector 4 is slidably connected in the cylinder body 1 through a sliding pair, one end of the movable connector 4 is fixedly provided with a support plate 5, an end surface of the support plate 5 is fixedly provided with a sealing device 6, and the sealing device is sleeved on an outer surface of the cylinder body, so as to isolate the end surface of the cylinder body 1 from the outside; the supporting plate and the movable connector are of an integrally formed structure, and the width of the supporting plate is 10-15cm according to the stress of the steel strand.
The utility model discloses a theory of operation: after the tensioning device is assembled, the steel strand is tensioned to a preset stress value through the tensioning jack, then hydraulic oil is injected into the cylinder body through one or two inlets and outlets, and the hydraulic oil injection is stopped when the steel strand is not reset after the tensioning jack is loosened; after adjustment is completed, the tensioning device is installed at a corresponding position, hydraulic oil is discharged through the control valve after concrete is completely solidified to reach the designed strength, and then cement mortar is injected into the cylinder body through the inlet and the outlet; or one inlet and outlet is used as an oil discharge port, the other inlet and outlet is used as a grouting port, cement mortar is injected, and hydraulic oil is extruded out of the cylinder body through the cement mortar with high specific gravity; after the cement mortar grouting is finished, the two inlets and the two outlets are closed, and then the tensioning device is installed to form concrete prestress;
in the oil discharging process, due to the discharge of hydraulic oil, the movable connector loses the supporting force of the hydraulic oil, and has the trend of opposite movement under the action of the steel strand, at the moment, the supporting plate is in contact with concrete, the steel strand is prevented from resetting by the support of the concrete on the supporting plate, so that the steel strand is prevented from generating larger stress loss, the tension force of the steel strand is ensured to be always within the design range, and the construction quality is improved; meanwhile, as shown in fig. 3 and 4, due to the plugging of the sealing device to the end face of the cylinder body, no concrete layer is arranged between the cylinder body and the movable connector, and meanwhile, the elastic modulus of the sealing device is smaller than that of the concrete, so that when the sealing device and the concrete are simultaneously extruded by the supporting plate, the sealing device is elastically yielding, the supporting plate is in hard contact with the concrete layer, the extrusion force is transmitted to the concrete layer, the pressure of the supporting plate is not transmitted to the cylinder body to damage the structure of the cylinder body, the structural stability of the cylinder body in the hydraulic oil pressure relief process is ensured, and the normal installation and work of the equipment are ensured; the utility model has the advantages of being simple in structure and simple in operation, not only simplified tensioning device's installation procedure greatly, improved work efficiency, it can also accelerate the construction progress under the operating mode environment such as the construction operation face is narrow and small greatly simultaneously, improves the efficiency of construction.
Claims (7)
1. The utility model provides a bridge prestressing force pretension tensioning equipment, includes cylinder body (1) and steel strand wires (2), be provided with exit (3) on cylinder body (1), its characterized in that: the multifunctional bathtub is characterized by further comprising a movable connector (4), wherein one end of the movable connector (4) is inserted into the bathtub body (1) in a sliding mode, the other end of the movable connector is provided with a supporting plate (5), and the projection of the bathtub body (1) is located in the projection range of the supporting plate (5) along the same direction; a sealing device (6) used for isolating the end face of the cylinder body (1) is arranged between the movable connector (4) and the cylinder body (1), and the elastic modulus of the sealing device (6) is smaller than that of concrete.
2. The pre-tensioned bridge prestressing device as set forth in claim 1, wherein: sealing device (6) adopt rubber or plastics preparation, sealing device (6) cover is arranged in swing joint head (4), and the both ends of sealing device (6) respectively with the terminal surface counterbalance of cylinder body (1) and backup pad (5), and along same direction, the projection of cylinder body (1) is located sealing device (6)'s projection scope or coincides with sealing device (6)'s projection.
3. The pre-tensioned bridge prestressing device as set forth in claim 2, wherein: a sealing groove (7) and a sealing block (8) which are matched with each other are arranged between the sealing device (6) and the cylinder body (1); a sealing groove (7) and a sealing block (8) which are matched with each other are arranged between the sealing device (6) and the movable connector (4).
4. The pre-tensioned bridge prestressing device as set forth in claim 1, wherein: the sealing device (6) is made of rubber or plastics, one end of the sealing device (6) is sleeved on the cylinder body (1), and the other end of the sealing device is fixedly connected with the supporting plate (5).
5. The pre-tensioned bridge prestressing device as set forth in claim 1, wherein: an integrated structure is arranged between the support plate (5) and the movable connector (4), and the width of the support plate (5) is 10-15 cm.
6. The pre-tensioned bridge prestressing device as set forth in claim 1, wherein: be provided with on the swing joint head (4) and overhaul storehouse (9), the one end screw thread that overhauls storehouse (9) is connected with end cap (10), is provided with P anchor (11) that link to each other with steel strand wires (2) in overhauing storehouse (9).
7. The pre-tensioned bridge prestressing device as set forth in claim 6, wherein: an inlet and an outlet (3) which are matched with each other are arranged between the plug (10) and the overhaul bin (9), and a control valve (12) is arranged on the inlet and the outlet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921008576.7U CN210216171U (en) | 2019-07-01 | 2019-07-01 | Bridge prestressing force pretension tensioning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921008576.7U CN210216171U (en) | 2019-07-01 | 2019-07-01 | Bridge prestressing force pretension tensioning equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210216171U true CN210216171U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921008576.7U Active CN210216171U (en) | 2019-07-01 | 2019-07-01 | Bridge prestressing force pretension tensioning equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975981A (en) * | 2020-07-28 | 2020-11-24 | 南京钜力智能制造技术研究院有限公司 | Prefabricated part, and tensioning device and tensioning method for end part of prefabricated part |
-
2019
- 2019-07-01 CN CN201921008576.7U patent/CN210216171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975981A (en) * | 2020-07-28 | 2020-11-24 | 南京钜力智能制造技术研究院有限公司 | Prefabricated part, and tensioning device and tensioning method for end part of prefabricated part |
| WO2022021523A1 (en) * | 2020-07-28 | 2022-02-03 | 南京钜力智能制造技术研究院有限公司 | Prefabricated component, end tensioning device of prefabricated component, and tensioning method |
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