Prestressed concrete member

Abstract

The utility model discloses a prestressed concrete member, which belongs to the technical field of concrete members, and comprises a tensioning table and a plurality of reinforcing steel bars, the left side of the top end of the tensioning table is fixedly connected with a fixed plate, the right side of the top end of the tensioning table is slidably connected with a tensioning plate, and the top end of the tensioning plate and the top end of the fixed plate are respectively provided with a plurality of reinforcing steel bar grooves; when the prestressed concrete member is used, as shown in the attached drawing, the telescopic ends of the two hydraulic cylinders stretch out, the tensioning plate is jacked rightwards, so that a plurality of reinforcing steel bars are stretched, then concrete is poured into the two U-shaped formworks, after the concrete is solidified, the two inserting plates are pulled out, and in addition, the two inserting plates are pulled out, and the two inserting plates are pulled out. And the telescopic ends of the two hydraulic cylinders are retracted, the motor is started, the rotary disc is driven to rotate by a fixed angle, and the two movable plates are promoted to move away from each other in cooperation with the action of the two push-pull rods, and the two U-shaped mold plates are driven to achieve demolding.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete components, in particular to a prestressed concrete component. Background Art

[0002] Prestressed concrete structures are structures in which pressure is artificially applied to structural components before they are subjected to external loads. The resulting prestressed state is used to reduce or offset the tensile stress caused by the external loads. This means that the concrete's higher compressive strength compensates for its insufficient tensile strength, delaying cracking in the tensile zone. Structures made of prestressed concrete are also called prestressed reinforced concrete structures because they achieve precompressive stress by tensioning steel bars.

[0003] At present, prestressed concrete is used to compensate for the phenomenon of premature cracking in concrete. Before the component is used, a prestress is applied to the concrete. That is, the steel bars are stretched in the tensile zone of the concrete by artificial force, and the retractive force of the steel bars is used to pre-stress the tensile zone of the concrete. However, the prestressed concrete components of the existing technology have the following disadvantages during use:

[0004] After the steel bars are tensioned and the concrete needs to be hardened, the two ends of each steel bar must be manually cut off using a handheld cutting tool. The two ends of each steel bar cannot be cut off in a coordinated manner during the demoulding process, resulting in low efficiency in manufacturing prestressed concrete structures. Therefore, a prestressed concrete component is needed. Utility Model Content

[0005] The purpose of the present invention is to provide a prestressed concrete component to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prestressed concrete member, comprising a tensioning table and a plurality of steel bars, wherein a fixed plate is fixedly connected to the left side of the top of the tensioning table, and a tensioning plate is slidably connected to the right side of the top of the tensioning table, and a plurality of steel bar grooves are provided on the top of the tensioning plate and the top of the fixed plate. Two symmetrically arranged U-shaped templates that slide on the top of the tensioning table are provided between the fixed plate and the tensioning plate, and insertion channels are provided on both sides of the top of the two U-shaped templates. The cross section of the two insertion channels on the same side after merging is an I-shaped structure, and a plug-in plate with an I-shaped cross section is movably inserted into the two insertion channels on the same side. The bottom ends of the two plug-in plates are provided with a plurality of alignment notches, and the two ends of each steel bar are respectively placed in the corresponding steel bar groove, and the two ends are respectively threaded with nuts, and the bottom end of the tensioning plate is fixedly connected to a slider with an I-shaped structure in vertical section, and the slider is slidably connected to the slide groove provided on the tensioning table, and a hydraulic cylinder is fixed to the right side wall of the two U-shaped templates, and the telescopic end of the hydraulic cylinder is movably overlapped on the outer side of the tensioning plate;

[0007] The opening and closing structure is installed at the bottom end of the tensioning platform and is connected with the top end of the tensioning platform and the back of the two U-shaped formworks;

[0008] The linkage type synchronous cutting structure is installed on the tensioning platform and is connected with the two U-shaped formworks.

[0009] As a preferred embodiment, the opening and closing structure comprises a motor fixed at the center of the bottom end of the tensioning platform, the output shaft of the motor is fixed with a rotating disc, the bottom end edge of the rotating disc is rotatably connected with two push-pull rods arranged in a ring array, and the ends of the two push-pull rods away from each other are rotatably connected to the bottom end of the movable plate.

[0010] As a preferred embodiment, the outer side of the two movable plates is movably sleeved with a limiting seat, the bottom end of the limiting seat is fixed to the top end of the tensioning platform, and the ends of the two movable plates opposite to each other are fixed to the back of the U-shaped formwork on the corresponding side.

[0011] As a preferred embodiment, the linkage type synchronous cutting structure comprises two bottom cutters symmetrically arranged and fixed at the top end of the tensioning platform, a top cutter is arranged above the top blade of each of the two bottom cutters, and the bottom blade of the top cutter faces the top blade of the bottom cutter.

[0012] As a preferred embodiment, the two sides of each of the two top cutters is fixed with a lifting plate, the end of the lifting plate away from the top cutter is slidably sleeved with a sliding sleeve on the outer side of a guide column, and the bottom end of the guide column is fixed to the top end of the tensioning platform.

[0013] As a preferred embodiment, the two sides of each of the two U-shaped formworks is fixed with a transmission column, and the lifting plate is provided with a transmission channel matched with the transmission column, and the vertical section of the transmission channel is in a "hockey stick" structure.

[0014] Compared with the prior art, the prestressed concrete member provided by the utility model at least comprises the following

[0015] Beneficial effects:

[0016] In the utility model, when the prestressed concrete component is used, as shown in the accompanying drawings, the telescopic ends of the two hydraulic cylinders are first extended, and the tensioning plate is pushed to the right, thereby achieving the stretching of multiple steel bars, and then concrete is poured into the two U-shaped templates. After the concrete solidifies, the two inserting plates are first pulled out, and the telescopic ends of the two hydraulic cylinders are retracted, and by starting the motor and driving the turntable to rotate a fixed angle, and cooperating with the action of the two push-pull rods, the two movable plates are prompted to move away from each other, and the two U-shaped templates are driven to achieve demoulding. In addition, during the demoulding process, the action of the transmission column and the transmission channel is cooperated, so that the two lifting plates on the same side drive the corresponding top cutters to move downward, and cooperate with the setting of the bottom cutter, so that the two ends of multiple steel bars can be cut synchronously, thereby greatly improving the efficiency of manufacturing prestressed concrete and having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional first-view structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional second perspective structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall three-dimensional third-view structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the overall three-dimensional fourth perspective structure of the utility model.

[0021] In the figure: 1. Tensioning table; 2. Fixed plate; 3. Tensioning plate; 31. Slider; 32. Hydraulic cylinder; 4. Steel bar groove; 5. U-shaped template; 51. Insert plate; 52. Alignment notch; 53. Insert channel; 6. Steel bar; 7. Opening and closing structure; 71. Motor; 72. Turntable; 73. Push-pull rod; 74. Movable plate; 75. Limit seat; 8. Linkage type synchronous cutting structure; 81. Bottom cutter; 82. Top cutter; 83. Lifting plate; 84. Guide column; 85. Transmission channel; 86. Transmission column. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments.

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The following embodiments are used to illustrate the present utility model, but cannot be used to limit the protection scope of the present utility model. The conditions in the embodiments can be further adjusted according to specific conditions. Under the premise of the concept of the present utility model, simple improvements to the method of the present utility model all belong to the scope claimed by the present utility model.

[0025] Embodiment

[0026] Currently, prestressed concrete is to compensate for the phenomenon of premature cracking of concrete. Before the component is used, a pre-pressure is applied to the concrete in advance. That is, in the tension zone of the concrete, the steel bar 6 is tensioned by an artificial force application method, and the retraction force of the steel bar 6 is used to make the tension zone of the concrete be pre-pressured in advance. However, the existing prestressed concrete components have the following disadvantages in the use process:

[0027] After the steel bar 6 is tensioned and it is necessary to wait for the concrete to harden, then manually cut the two ends of each steel bar 6 respectively by holding a cutting tool manually. It is impossible to联动实现对每个钢筋6的两端进行剪断 during the demolding process, resulting in low efficiency in manufacturing prestressed concrete structures;

[0028] For this reason, please refer to Figures 1-4 , the present utility model provides a prestressed concrete component, including: a tensioning table 1 and multiple steel bars 6. A fixed plate 2 is fixedly connected to the left side of the top end of the tensioning table 1. A tensioning plate 3 is slidably connected to the right side of the top end of the tensioning table 1. Multiple steel bar grooves 4 are opened at the top ends of the tensioning plate 3 and the fixed plate 2. There are two symmetrically arranged U-shaped templates 5 slidably arranged on the top end of the tensioning table 1 between the fixed plate 2 and the tensioning plate 3. Insertion channels 53 are opened on both sides of the top ends of the two U-shaped templates 5. The cross-section of the combination of the two insertion channels 53 on the same side is in an I-shaped structure. Plug plates 51 with an I-shaped cross-section are movably inserted into the two insertion channels 53 on the same side. Multiple alignment concave openings 52 are opened at the bottom ends of the two plug plates 51. The two ends of each steel bar 6 are respectively placed in the corresponding steel bar grooves 4 and are respectively threadedly connected with nuts. A slider 31 with an I-shaped cross-section is fixedly connected to the bottom end of the tensioning plate 3. The slider 31 is slidably connected to the chute provided on the tensioning table 1. Hydraulic cylinders 32 are fixedly connected to the right side walls of the two U-shaped templates 5. The telescopic ends of the hydraulic cylinders 32 are movably lapped on the outside of the tensioning plate 3. It should be noted that the telescopic ends of the hydraulic cylinders 32 must be movably attached to the outside of the tensioning plate 3, so as not to cause obstruction when the two U-shaped templates 5 are separated;

[0029] It also includes an opening and closing structure 7 and a linkage type synchronous cutting structure 8. The opening and closing structure 7 is installed at the bottom end of the tensioning table 1 and is connected to the top end of the tensioning table 1 and the backs of the two U-shaped templates 5;

[0030] It should be noted that there is an unclear expression "联动实现对每个钢筋6的两端进行剪断" in the original text. I have tried my best to understand and translate it according to the context, but it may need further clarification in the actual situation.The linkage synchronous cutting structure 8 is installed on the tensioning table 1 and connected with the two U-shaped templates 5.

[0031] Further as Figures 1-4 illustrated, it is worth specifically explained that the opening and closing structure 7 includes the motor 71 fixed at the bottom end center of the tensioning table 1, the output shaft of the motor 71 is fixedly connected with the rotating disc 72, the bottom end edge of the rotating disc 72 is rotatably connected with the two push-pull rods 73 arranged in an annular array, the ends away from each other of the two push-pull rods 73 are rotatably connected with the bottom ends of the two movable plates 74, the outer sides of the two movable plates 74 are movably sleeved with the limiting seats 75, the bottom ends of the limiting seats 75 are fixedly connected with the top end of the tensioning table 1, and the ends opposite to each other of the two movable plates 74 are fixedly connected with the back parts of the U-shaped templates 5 on the corresponding sides.

[0032] The motor 71 can adopt the stepping motor 71, which can drive the rotating disc 72 to rotate by a fixed angle.

[0033] Further as Figures 1-4 illustrated, it is worth specifically explained that the linkage synchronous cutting structure 8 includes the two bottom cutters 81 symmetrically arranged and fixed at the top end of the tensioning table 1, the top cutter 82 is arranged above the top blade of each of the two bottom cutters 81, the bottom blade of each of the top cutters 82 faces the top blade of the bottom cutter 81, the two sides of each of the two top cutters 82 are fixedly connected with the lifting plates 83, the ends away from the top cutters 82 of the lifting plates 83 are movably sleeved with the outer sides of the guide columns 84 through the sliding sleeves, the bottom ends of the guide columns 84 are fixedly connected with the top end of the tensioning table 1, the two sides of each of the two U-shaped templates 5 are fixedly connected with the transmission columns 86, the transmission channels 85 matched with the transmission columns 86 are formed in the lifting plates 83, and the vertical sections of the transmission channels 85 are in the shape of a "hockey stick".

[0034] The width of the transmission channel 85 is equal to the diameter of the transmission column 86.

[0035] In summary: when the prestressed concrete component is used, as shown in the drawings, the stretching ends of the two hydraulic cylinders 32 are first extended, the tensioning plate 3 is pushed to the right, the multiple steel bars 6 are stretched, then the concrete is poured into the two U-shaped templates 5, after the concrete is solidified, the two inserting plates 51 are first pulled out, the stretching ends of the two hydraulic cylinders 32 are retracted, the motor 71 is started, the rotating disc 72 is driven to rotate by a fixed angle, the two movable plates 74 are moved away from each other under the action of the two push-pull rods 73, the two U-shaped templates 5 are demolded, in the demolding process, the two lifting plates 83 on the same side drive the corresponding top cutters 82 to move downward under the action of the transmission columns 86 and the transmission channels 85, and the two ends of the multiple steel bars 6 are cut synchronously with the bottom cutters 81, so that the efficiency of manufacturing the prestressed concrete is greatly improved, and the use effect is good.

[0036] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms "comprising" or "including" or similar words used in the present application intend to encompass the elements or objects listed after such terms, as well as equivalents thereof, without precluding other elements or objects. The terms "connected" or "coupled" or similar terms are not limited to a direct connection or coupling, but also include an indirect connection or coupling, no matter whether it is physical, mechanical, electrical, or otherwise. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.

[0037] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made hereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A prestressed concrete member comprising a tensioning bed (1) and a plurality of reinforcing bars (6), characterized in that, The top left side of the tensioning platform (1) is fixedly connected with a fixed plate (2), and the top right side of the tensioning platform (1) is slidably connected with a tensioning plate (3). The top of the tensioning plate (3) and the top of the fixed plate (2) are both provided with a plurality of steel bar grooves (4). Two symmetrically arranged U-shaped templates (5) sliding on the top of the tensioning platform (1) are provided between the fixed plate (2) and the tensioning plate (3). Insertion channels (53) are provided on both sides of the top of the two U-shaped templates (5). The cross section of the two insertion channels (53) on the same side after being combined is an I-shaped structure. The two insertion channels (53) on the same side are ) are movably connected with a plug plate (51) with an I-shaped cross section, and the bottom ends of the two plug plates (51) are provided with a plurality of alignment notches (52), and the two ends of each steel bar (6) are respectively placed in the corresponding steel bar groove (4), and the two ends are respectively threaded with nuts, and the bottom end of the tensioning plate (3) is fixed with a slider (31) with an I-shaped vertical cross section, and the slider (31) is slidably connected to the slide groove provided on the tensioning table (1), and the right side walls of the two U-shaped templates (5) are fixed with a hydraulic cylinder (32), and the telescopic ends of the hydraulic cylinder (32) are movably overlapped with the outer side of the tensioning plate (3); It also includes an opening and closing structure (7) and a linked synchronous cutting structure (8), wherein the opening and closing structure (7) is installed at the bottom end of the tensioning platform (1) and is connected to the top end of the tensioning platform (1) and the backs of the two U-shaped templates (5); The linked synchronous cutting structure (8) is installed on the tensioning platform (1) and is connected to the two U-shaped templates (5).

2. A prestressed concrete member according to claim 1, characterized in that: The opening and closing structure (7) includes a motor (71) fixed at the center of the bottom end of the tensioning platform (1), the output shaft of the motor (71) is fixed with a turntable (72), and the bottom edge of the turntable (72) is rotatably connected to two push-pull rods (73) arranged in a circular array, and the opposite ends of the two push-pull rods (73) are rotatably connected to the bottom end of the movable plate (74).

3. A prestressed concrete member according to claim 2, c h a r a c t e r i z e d in that: The outer sides of the two movable plates (74) are movably sleeved with a limit seat (75), the bottom ends of the limit seats (75) are fixedly connected to the top end of the tensioning platform (1), and the opposite ends of the two movable plates (74) are fixedly connected to the back of the U-shaped template (5) on the corresponding side.

4. A prestressed concrete member as defined in claim 1, wherein: The linkage synchronous cutting structure (8) comprises two symmetrically arranged bottom cutters (81) fixed to the top of the tensioning table (1), a top cutter (82) is provided above the top blades of the two bottom cutters (81), and the bottom blades of the top cutters (82) are both oriented toward the top blade of the bottom cutter (81).

5. A prestressed concrete member according to claim 4, wherein: A lifting plate (83) is fixedly connected to both side walls of the two top cutters (82), and the end of the lifting plate (83) facing away from the top cutter (82) is slidably mounted on the outside of the guide column (84) through a sliding sleeve, and the bottom end of the guide column (84) is fixedly connected to the top of the tensioning table (1).

6. A prestressed concrete member according to claim 5, wherein: Transmission columns (86) are fixedly connected to both side walls of the two U-shaped templates (5), and transmission channels (85) matching with the transmission columns (86) are provided on the lifting plate (83). The vertical cross-section of the transmission channel (85) is a "hockey stick" structure.

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