A non-bonded prestressed concrete testing device

Abstract

The utility model relates to concrete test technical field discloses a kind of unbonded prestressed concrete testing equipment, including platen, the side of platen top is equipped with electrical bin, the other side of platen top is provided with translation bin, walking assembly is uniformly installed at the four corners of platen, clamping assembly is uniformly installed at the both sides in translation bin, and two clamping assemblies are oppositely arranged, and form clamping cavity.The unbonded prestressed concrete testing equipment, the spacing between the two arc clamping cavities is adjustable, the smaller the spacing is, the smaller the diameter of the clamped steel strand is, and vice versa, so by adjusting the spacing between the two arc clamping cavities, effectively clamping and fixing different sizes of steel strand are adapted, without frequent replacement of clamping plate for different specifications of steel strand, and the inside of arc clamping cavity is provided with anti-skid relief, the anti-skid relief increases the friction coefficient between the outer wall of steel strand, thereby further improving the stability of steel strand clamping.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and in particular to a testing device for unbonded prestressed concrete. Background Technology

[0002] Unbonded prestressed concrete technology is increasingly widely used in modern building structures, especially in large-span and complex structures, due to its advantages such as convenient construction and low friction loss. As the core load-bearing component, the accurate testing of the mechanical properties of steel strands is crucial for assessing structural safety and durability.

[0003] Currently, in order to maintain the stability of steel strand clamping, clamps of corresponding sizes are designed according to the size of the steel strand. However, when testing steel strands of different sizes, the clamps cannot be effectively adapted, resulting in poor clamping adaptability. To adapt to steel strands of different sizes, multiple sets of clamps of different specifications need to be prepared, which is cumbersome to operate, time-consuming to change, and seriously reduces testing efficiency. Utility Model Content

[0004] In view of the above-mentioned problems of clamping adaptability when testing steel strands of different sizes, the present invention is proposed.

[0005] Therefore, the purpose of this utility model is to provide a test device for unbonded prestressed concrete, the purpose of which is to provide a clamp that can be adapted to hold steel strands of different sizes.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a test device for unbonded prestressed concrete, including a platform, an electrical compartment installed on one side of the top of the platform, a translation compartment provided on the other side of the top of the platform, walking components installed at the four corners of the platform, and clamping components installed on both sides inside the translation compartment, with the two clamping components arranged in a relative position to form a clamping cavity; The clamping assembly includes a fixed plate that is obliquely fixed inside the translation chamber. An inclined seat is slidably installed on one end face of the fixed plate, and a second electric telescopic rod that drives the inclined seat to move is installed on the other end face of the fixed plate. A clamping plate is fixed to the flat end of the inclined seat. An arc-shaped clamping cavity is opened in the middle of the end face of the clamping plate away from the inclined seat. The interior of the arc-shaped clamping cavity is equipped with anti-slip ridges arranged in a spiral shape.

[0007] As an improved technical solution, a linear motor for driving the translation chamber to move laterally is installed on the top of the platform and on the side near the translation chamber. A double-headed electric push rod for driving the translation chamber to rise and fall is fixedly installed on the movable end of the linear motor, and the movable end of the double-headed electric push rod is fixed to the bottom of the translation chamber.

[0008] As an improved technical solution, a dovetail groove is provided on one end face of the fixed plate near the inclined seat, and a dovetail slider that slides inside the dovetail groove is installed on the inclined surface of the inclined seat.

[0009] As an improved technical solution, the end face of the fixed plate away from the inclined seat is provided with a connecting channel that communicates with the inside of the dovetail slide groove. The movable end of the second electric telescopic rod is fixedly connected to a linkage block, and one end of the linkage block passes through the connecting channel and is fixed on the dovetail slider.

[0010] As an improved technical solution, the walking assembly includes four side platforms, with a first electric telescopic rod fixed to the top of each side platform, and walking wheels installed on the movable end of each side platform.

[0011] As an improved technical solution, a hollow chamber is welded to the bottom of the side platform, and the walking wheels are located inside the hollow chamber, while the height of the hollow chamber is greater than the overall height of the walking wheels.

[0012] As an improved technical solution, it also includes a ground-mounted base fixed on the ground. The top of the ground-mounted base is detachably installed with a connecting hole block by bolts. A positioning rod is welded to the center of the connecting hole block at the end away from the ground-mounted base. Positioning holes for the positioning rod to pass through are opened at the four corners of the top of the platform.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, the first electric telescopic rod extends to drive the traveling wheels out of the hollow chamber, so that the traveling wheels touch the ground and the hollow chamber is no longer in contact with the ground. At this time, the traveling wheels facilitate the movement of the testing equipment. When the equipment does not need to be moved, the first electric telescopic rod retracts and completely retracts the traveling wheels into the hollow chamber, and the hollow chamber is placed on the ground. The friction force improves the stability of the device on the ground. Furthermore, the buried base is fixed to the ground surface in an underground manner. The connecting hole block is fixed to the buried base by threads. At this time, the positioning rod passes through the inside of the positioning hole, and the platform and the positioning rod are in a snap-fit ​​state. Since the connecting hole block is fixed to the ground surface, the stability of placing the platform on the platform is further improved, which helps to prevent the platform from moving on the ground surface during testing.

[0014] 2. This utility model features an adjustable spacing between two arc-shaped clamping cavities. A smaller spacing results in a smaller diameter steel strand being clamped, and vice versa. Therefore, by adjusting the spacing between the two arc-shaped clamping cavities, it can effectively clamp and fix steel strands of different sizes without the need for frequent replacement of clamping plates for different specifications of steel strands. Furthermore, the interior of the arc-shaped clamping cavities is equipped with anti-slip ridges, which increase the coefficient of friction between the anti-slip ridges and the outer wall of the steel strand, thereby further improving the stability of the steel strand clamping. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of an unbonded prestressed concrete testing device according to the present invention.

[0016] Figure 2 This is a schematic diagram of the clamping assembly of an unbonded prestressed concrete testing device according to the present invention.

[0017] Figure 3 This is a schematic diagram of the connecting channel of an unbonded prestressed concrete testing device according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Platform; 2. Linear motor; 3. Double-headed electric push rod; 4. Translation compartment; 5. Clamping assembly; 51. Fixing plate; 52. Inclined seat; 53. Clamping plate; 54. Arc-shaped clamping cavity; 55. Anti-slip texture; 56. Dovetail slider; 57. Dovetail groove; 58. Second electric telescopic rod; 59. Linkage block; 510. Connecting channel; 6. Electrical compartment; 7. Positioning hole; 8. Positioning rod; 9. Connecting hole block; 10. Buried base; 11. Side platform; 12. First electric telescopic rod; 13. Hollow compartment; 14. Traveling wheel. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Example 1 Reference Figures 1-3 This is the first embodiment of the present invention, which provides an unbonded prestressed concrete testing device. This unbonded prestressed concrete testing device includes a platform 1, an electrical compartment 6 installed on one side of the top of the platform 1, a translation compartment 4 provided on the other side of the top of the platform 1, and a cavity provided in the middle of the translation compartment 4. Walking components are installed at the four corners of the platform 1. Clamping components 5 are installed on both sides inside the translation compartment 4, and the two clamping components 5 are arranged in a relative state to form a clamping cavity. The clamping assembly 5 includes a fixed plate 51 that is obliquely fixed inside the translation chamber 4. An inclined seat 52 is slidably mounted on one end face of the fixed plate 51, and a second electric telescopic rod 58 that drives the inclined seat 52 to move is mounted on the other end face of the fixed plate 51. The inclined seat 52 has an inclined surface on one side near the fixed plate 51 and a flat surface on the other side. A clamping plate 53 is fixed to the flat end of the inclined seat 52. An arc-shaped clamping cavity 54 is opened in the middle of the end face of the clamping plate 53 away from the inclined seat 52. The interior of the arc-shaped clamping cavity 54 is equipped with anti-slip ridges 55 arranged in a spiral shape. The anti-slip ridges 55 increase the friction coefficient between the anti-slip ridges and the outer wall of the steel strand, thereby further improving the stability of clamping the steel strand.

[0021] A linear motor 2 is installed on the top of the platform 1 and on the side near the translation chamber 4 to drive the translation chamber 4 to move laterally. A double-headed electric push rod 3 that drives the translation chamber 4 to rise and fall is fixedly installed on the movable end of the linear motor 2. The movable end of the double-headed electric push rod 3 is fixed to the bottom of the translation chamber 4. The extension and retraction of the double-headed electric push rod 3 can adjust the height of the clamping point formed by the two clamping components 5 to adapt to clamping steel strands of different heights, further improving flexibility and ensuring coaxial clamping, thus improving the clamping firmness.

[0022] A dovetail groove 57 is provided on one end face of the fixed plate 51 near the inclined seat 52, and a dovetail slider 56 that slides inside the dovetail groove 57 is installed on the inclined surface of the inclined seat 52.

[0023] The fixed plate 51 has a connecting channel 510 that communicates with the inside of the dovetail slide 57 on one end face away from the inclined seat 52. The movable end of the second electric telescopic rod 58 is fixedly connected to the linkage block 59, and one end of the linkage block 59 passes through the connecting channel 510 and is fixed on the dovetail slider 56.

[0024] During use, the two ends of the outer wall of the steel strand are clamped inside the two arc-shaped clamping cavities 54. Since the distance between the clamping plates 53 is adjustable, that is, the distance between the two arc-shaped clamping cavities 54 is adjustable, the smaller the distance, the smaller the diameter of the steel strand clamped, and vice versa. Therefore, by adjusting the distance between the two arc-shaped clamping cavities 54, steel strands of different sizes can be effectively clamped and fixed without the need to frequently replace the clamping plates 53 for different specifications of steel strands.

[0025] Example 2 Reference Figure 1This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the walking component includes four side pedestals 11, which are welded to the four corners of the platform 1. A first electric telescopic rod 12 is fixed to the top of the side pedestal 11, and the movable end of the first electric telescopic rod 12 is located below the side pedestal 11. A walking wheel 14 is installed on the movable end of the side pedestal 11.

[0026] A hollow chamber 13 is welded to the bottom of the side platform 11, and the traveling wheel 14 is located inside the hollow chamber 13. At the same time, the height of the hollow chamber 13 is greater than the overall height of the traveling wheel 14.

[0027] It also includes a ground-mounted base 10, the top of which is detachably bolted with a connecting hole block 9. A positioning rod 8 is welded to the center of the end of the connecting hole block 9 away from the ground-mounted base 10. Positioning holes 7 are provided at the four corners of the top of the platform 1 for the positioning rod 8 to pass through. The end of the positioning rod 8 away from the ground-mounted base 10 has an external thread, and a hexagonal nut is installed on the positioning rod 8 through the external thread. By installing the hexagonal nut on the external thread, the platform 1 is clamped between the connecting hole block 9 and the hexagonal nut. In the middle, the platform 1 and the positioning rod 8 are fixed together; conversely, the fixing between the platform 1 and the positioning rod 8 can be released. The underground base 10 is fixed to the ground surface in an underground manner. The connecting hole block 9 is fixed to the underground base 10 by threads. At this time, the positioning rod 8 passes through the inside of the positioning hole 7, and the platform 1 and the positioning rod 8 are in a snap-fit ​​state. Since the connecting hole block 9 is fixed to the ground surface, the stability of placing the platform 1 on the platform 1 is further improved, which helps to prevent the platform 1 from moving on the ground surface during testing.

[0028] During use, the first electric telescopic rod 12 extends to drive the walking wheel 14 out of the hollow chamber 13, so that the walking wheel 14 touches the ground and the hollow chamber 13 is separated from the ground. At this time, the walking wheel 14 facilitates the movement of the test equipment. When it is not necessary to move, the first electric telescopic rod 12 shortens to completely retract the walking wheel 14 into the hollow chamber 13, and the hollow chamber 13 is placed on the ground. The friction improves the stability of the device on the ground.

[0029] Based on embodiments 1-2, the working principle of this utility model is as follows: the steel strand is positioned between the opposing surfaces of the two clamping components 5, the second electric telescopic rod 58 shortens and drives the linkage block 59 to move toward the narrow end of the inclined seat 52. Since the dovetail slider 56 moves synchronously with the linkage block 59, when the linkage block 59 moves toward the inclined seat 52, it also drives the clamping plate 53 to move toward the narrow end of the inclined seat 52. The two clamping components 5 simultaneously drive the clamping plate 53 to move toward the narrow end, which shortens the distance between the two clamping plates 53. The two ends of the outer wall of the steel strand are respectively located inside the two arc-shaped clamping cavities 54, and finally the steel strand is clamped between the two clamping plates 53. After the steel strand is clamped, the linear motor 2 drives the translation chamber 4 to move away from the steel strand, pulling one end of the steel strand outward for inspection. Under the action of friction, the two clamping plates 53 will be pulled towards the steel strand, which will reduce the distance between the two clamping plates 53. The smaller the distance between the two clamping plates 53, the tighter the clamping. The more it is pulled, the tighter the clamping becomes, which is conducive to preventing the steel strand from falling off.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A non-bonded prestressed concrete testing device comprising a platen (1), characterized in that: An electrical compartment (6) is installed on one side of the top of the platform (1), and a translation compartment (4) is provided on the other side of the top of the platform (1). A walking component is installed at each of the four corners of the platform (1). A clamping component (5) is installed on both sides inside the translation compartment (4), and the two clamping components (5) are arranged in a relative state to form a clamping cavity. The clamping assembly (5) includes a fixed plate (51) that is obliquely fixed inside the translation chamber (4). An inclined seat (52) is slidably installed on one end face of the fixed plate (51). A second electric telescopic rod (58) that drives the inclined seat (52) to move is installed on the other end face of the fixed plate (51). A clamping plate (53) is fixed on the flat end of the inclined seat (52). An arc-shaped clamping cavity (54) is opened in the middle of the end face of the clamping plate (53) away from the inclined seat (52). The interior of the arc-shaped clamping cavity (54) is equipped with anti-slip ridges (55) arranged in a spiral shape.

2. The non-bonded prestressed concrete testing apparatus of claim 1, wherein: A linear motor (2) for driving the translation chamber (4) to move laterally is installed on the top of the platform (1) and on the side near the translation chamber (4). A double-headed electric push rod (3) for driving the translation chamber (4) to rise and fall is fixedly installed on the movable end of the linear motor (2), and the movable end of the double-headed electric push rod (3) is fixed at the bottom of the translation chamber (4).

3. The non-bonded prestressed concrete testing apparatus of claim 2, wherein: The fixed plate (51) has a dovetail groove (57) on one end face near the inclined seat (52), and a dovetail slider (56) that slides inside the dovetail groove (57) is installed on the inclined surface of the inclined seat (52).

4. The non-bonded prestressed concrete testing apparatus of claim 3, wherein: The fixed plate (51) has a connecting channel (510) on one end face away from the inclined seat (52) that is connected to the inside of the dovetail slide (57). The movable end of the second electric telescopic rod (58) is fixedly connected to a linkage block (59), and one end of the linkage block (59) passes through the connecting channel (510) and is fixed on the dovetail slider (56).

5. The non-bonded prestressed concrete testing apparatus of claim 4, wherein: The walking assembly includes four side platforms (11), with a first electric telescopic rod (12) fixed to the top of each side platform (11), and a walking wheel (14) installed on the movable end of each side platform (11).

6. The non-bonded prestressed concrete testing apparatus of claim 5, wherein: The bottom of the side platform (11) is welded with a hollow chamber (13), and the walking wheel (14) is located inside the hollow chamber (13). At the same time, the height of the hollow chamber (13) is greater than the overall height of the walking wheel (14).

7. The non-bonded prestressed concrete testing apparatus of claim 6, wherein: It also includes a ground-mounted base (10) fixed on the ground. The top of the ground-mounted base (10) is detachably installed with a connecting hole block (9) by bolts. A positioning rod (8) is welded to the center of the end of the connecting hole block (9) away from the ground-mounted base (10). Positioning holes (7) for the positioning rod (8) to pass through are opened at the four corners of the top of the platform (1).

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