Concrete stress measuring device

Abstract

The invention relates to the technical field of stress testing, in particular to a concrete stress measuring device which comprises a detection table, a concrete testing box is arranged on the inner side of the detection table, a fixed frame is installed on one side of the concrete testing box, and a movable frame is installed on the other side of the concrete testing box; the movable frame comprises a movable bottom frame and a movable top frame, semicircular holes with different hole diameters are evenly formed in the inner sides of the movable bottom frame and the movable top frame, anti-skid pads are installed on the inner sides of the semicircular holes, a portal frame is installed at the top end of the movable bottom frame, and a hydraulic rod is installed on one side of the portal frame and connected with the movable top frame. The movable underframe is in sliding connection with the detection table; according to the device, through the arrangement of the fixed frame and the movable frame, a steel bar can be simply, conveniently and stably fixed and stretched, so that prestress treatment can be conveniently carried out on concrete, and subsequent and retrograde measurement can be conveniently carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of stress testing, and specifically to a concrete stress measuring device. Background Art

[0002] Concrete stress refers to the stress generated inside a concrete structure due to external loads or internal factors. In order to effectively resist the stress of external loads, prestress treatment is generally carried out on the concrete structure. Before prestress treatment of the concrete, stress experiments need to be carried out according to its material and load, and the stress is measured during the experiment. Most of the existing measuring devices are relatively simple and cannot fix the steel bars simply, conveniently and stably, which is not conducive to subsequent stress measurement. Therefore, a concrete stress measuring device is proposed for the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a concrete stress measuring device to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A concrete stress measuring device includes a detection table, a concrete test box is provided inside the detection table, a fixing frame is installed on one side of the concrete test box, and a movable frame is installed on the other side of the concrete test box; The movable frame includes a movable bottom frame and a movable top frame. Semi-circular holes with different apertures are evenly provided inside the movable bottom frame and the movable top frame, and anti-slip pads are installed inside the semi-circular holes. A gantry is installed at the top of the movable bottom frame, a hydraulic rod is installed on one side of the gantry, and the hydraulic rod is connected to the movable top frame. The movable bottom frame is slidably connected to the detection table.

[0005] Preferably, the concrete test box includes a box frame, a box bottom plate is movably installed inside the box frame, and a box side plate is movably installed on the upper side of the box bottom plate.

[0006] Preferably, a first rotating screw penetrates through the bottom end of the box frame, and the other end of the first rotating screw is rotatably connected to the box bottom plate. The box bottom plate is slidably connected to the box frame. A box side frame is installed on the side of the box frame, a second rotating screw penetrates through the inside of the box side frame, and the other side of the second rotating screw is connected to the box side plate.

[0007] Preferably, a vertically arranged chute is provided on the side of the box side plate, and a slider slides on one side of the chute, and the slider is connected to the second rotating screw.

[0008] Preferably, a heightening plate is installed at the top of the box body frame. A plurality of semi-circular holes with different diameters are provided at the top of the box body frame and the bottom end of the heightening plate. A box body fixing plate is installed on one side of the heightening plate.

[0009] Preferably, the fixing frame includes a fixed bottom frame. A fixed top frame is installed on the upper side of the fixed bottom frame. Semi-circular holes with different apertures are evenly provided on the inner sides of the fixed bottom frame and the fixed top frame. An anti-slip pad is installed on the inner side of the semi-circular holes. A fixing bolt is installed on the inner side of the fixed top frame.

[0010] Preferably, the movable frame includes a sliding control structure. The sliding control structure includes a pull rod. The pull rod is connected to the movable bottom frame. The bottom end of the movable bottom frame slides on the detection table through a slider and a chute. A return spring is installed on the inner side of the chute.

[0011] Preferably, the pull rod is a threaded rod. The two sides of the pull rod are connected to the detection table through rotating seats. A worm gear is installed on one side of the pull rod. A worm is meshed with one side of the worm gear. The worm is installed at the end of the main shaft of the control motor.

[0012] Preferably, limiting structures are further installed on both sides of the movable bottom frame. The limiting structures include limiting holes. Limiting plates are installed on the inner sides of the limiting holes. The limiting plates are located on both sides of the movable bottom frame.

[0013] Preferably, a screw rod is spirally installed inside the movable bottom frame. The screw rod is located between the limiting plates on both sides.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, through the provided fixing frame and movable frame, the steel bars can be fixed and stretched simply, conveniently and stably, so as to facilitate the prestress treatment of concrete, and further facilitate the subsequent reverse measurement use; 2. In the present invention, through the provided concrete test box, it is not only convenient to install and use steel bars with different diameters, but also the volume of the concrete block and the position of the steel bars in the concrete block can be adjusted conveniently according to actual needs, so as to facilitate the measurement of data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is for the present invention Figure 1 structural schematic diagram of part A; Figure 3 is for the present invention Figure 1 structural schematic diagram of part B; Figure 4 is for the present invention Figure 1 structural schematic diagram of part C; Figure 5 For the present invention Figure 1 Schematic diagram of the structure at position D; Figure 6 Schematic diagram of the structure of the concrete test box of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at position E.

[0016] In the figure: 1, test bench; 2, concrete test box; 21, box frame; 22, box bottom plate; 23, box side plate; 24, first rotating screw; 25, box side frame; 26, second rotating screw; 27, slider; 28, heightening plate; 29, box fixing plate; 3, fixing frame; 31, fixing bottom frame; 32, fixing top frame; 33, fixing bolt; 4, movable frame; 41, movable bottom frame; 42, movable top frame; 43, gantry; 44, hydraulic rod; 45, sliding control structure; 451, pull rod; 452, return spring; 453, rotating seat; 454, worm gear; 455, worm; 456, control motor; 46, limiting structure; 461, limiting hole; 462, limiting plate; 463, screw rod. Specific embodiments

[0017] Please refer to Figures 1-7 , the present invention provides a technical solution: A concrete stress measuring device, including a test bench 1, a concrete test box 2 is provided inside the test bench 1, a fixing frame 3 is installed on one side of the concrete test box 2, and a movable frame 4 is installed on the other side of the concrete test box 2; the movable frame 4 includes a movable bottom frame 41 and a movable top frame 42, semi-circular holes with different apertures are evenly provided inside the movable bottom frame 41 and the movable top frame 42, and anti-slip pads are installed inside the semi-circular holes, a gantry 43 is installed at the top of the movable bottom frame 41, a hydraulic rod 44 is installed on one side of the gantry 43, and the hydraulic rod 44 is connected to the movable top frame 42, the movable bottom frame 41 is slidably connected to the test bench 1, and the hydraulic rod 44 drives the movable top frame 42 to apply pressure through the gantry 43, and with the sliding adjustment of the movable bottom frame 41, precise matching of the specimen height and clamping pressure is achieved, reducing the manual adjustment time.

[0018] The concrete test box 2 includes a box body frame 21. A box body bottom plate 22 is movably installed inside the box body frame 21, and a box body side plate 23 is movably installed on the upper side of the box body bottom plate 22; the modular box body bottom plate 22 and side plates 23 are connected by sliding grooves and rotating screws, and the test area size can be quickly adjusted to adapt to various sample forms such as cylinders and cubes; a first rotating screw 24 penetrates through the bottom end of the box body frame 21, and the other end of the first rotating screw 24 is rotatably connected to the box body bottom plate 22. The box body bottom plate 22 is slidably connected to the box body frame 21. A box body side frame 25 is installed on the side of the box body frame 21. A second rotating screw 26 penetrates through the inside of the box body side frame 25, and the other side of the second rotating screw 26 is connected to the box body side plate 23; a vertically arranged sliding groove is formed on the side of the box body side plate 23, and a slider 27 slides on one side of the sliding groove, and the slider 27 is connected to the second rotating screw 26; a heightening plate 28 is installed at the top of the box body frame 21. A plurality of semi-circular holes with different diameters are formed at the top of the box body frame 21 and the bottom end of the heightening plate 28. A box body fixing plate 29 is installed on one side of the heightening plate 28. The design of the concrete test box 2 can realize the installation and testing of multi-size samples, avoid the installation errors of traditional split devices, and improve the testing stability; the fixing frame 3 includes a fixing bottom frame 31. A fixing top frame 32 is installed on the upper side of the fixing bottom frame 31. Semi-circular holes with different apertures are evenly formed inside the fixing bottom frame 31 and the fixing top frame 32, and anti-slip pads are installed inside the semi-circular holes. A fixing bolt 33 is installed inside the fixing top frame 32; the design of the semi-circular holes + anti-slip pads of the fixing top frame 32 and the fixing bottom frame 31, combined with the locking function of the fixing bolt 33, ensures the axis alignment of the sample during the pressing process and avoids eccentric errors; the movable frame 4 includes a sliding control structure 45. The sliding control structure 45 includes a pull rod 451. The pull rod 451 is connected to the movable bottom frame 41. The bottom end of the movable bottom frame 41 slides on the detection table 1 through a slider and a sliding groove, and a return spring 452 is installed inside the sliding groove; the pull rod 451 is a threaded rod, and both sides of the pull rod 451 are connected to the detection table 1 through rotating seats 453. A worm gear 454 is installed on one side of the pull rod 451, and a worm 455 meshes with one side of the worm gear 454. The worm 455 is installed at the end of the main shaft of the control motor 456; limiting structures 46 are also installed on both sides of the movable bottom frame 41. The limiting structures 46 include limiting holes 461, and limiting plates 462 are installed inside the limiting holes 461. The limiting plates 462 are located on both sides of the movable bottom frame 41; a screw rod 463 is spirally installed inside the movable bottom frame 41, and the screw rod 463 is located between the limiting plates 462 on both sides. This setting can further fix the movable bottom frame 41, thereby reducing the pressure on the sliding control structure 45 and ensuring the service life of the equipment.

[0019] Workflow: First, select the appropriate steel bars. Then, place the steel bars inside the fixed frame 3 and the movable frame 4. Next, tighten the fixing bolts 33 to fix one end of the steel bar through the fixed bottom frame 31 and the fixed top frame 32. Then, start the hydraulic rod 44 to fix the other end of the steel bar through the movable bottom frame 41 and the movable top frame 42. Then, start the control motor 456 to continue stretching the steel bar through the worm 455, the worm gear 454, and the pull rod 451. When stretched to a certain extent, insert the limit plate 462 into the limit hole 461, and then clamp the screw rod 463 between the two limit plates 462 to complete the fixation of the movable bottom frame 41. Finally, adjust the space of the test box by adjusting the positions of the side plate 23 and the bottom plate 22 of the box, and fix them with the first rotating screw 24 and the second rotating screw 27. Finally, pour the concrete. Before pouring the concrete, stress gauges need to be installed on the steel bars. At the same time, after the concrete solidifies to reach the designed strength, stress gauges are also installed on the concrete. Finally, connect the static strain gauge.

[0020] In this article, specific examples are used to elaborate on the principles and implementation methods of the present invention. The descriptions of the above examples are only for helping to understand the method of the present invention and its core idea. The above are only the preferred implementation modes of the present invention. It should be noted that due to the limited nature of written expression and objectively existing infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principles of the present invention, several improvements, refinements, or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes, or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. A concrete stress measuring device, comprising a detection table (1), characterized in that: Inside the detection table (1), a concrete test box (2) is provided. On one side of the concrete test box (2), a fixed frame (3) is installed, and on the other side of the concrete test box (2), a movable frame (4) is installed; The movable frame (4) includes a movable bottom frame (41) and a movable top frame (42). Semi-circular holes with different apertures are evenly provided inside the movable bottom frame (41) and the movable top frame (42), and anti-slip pads are installed inside the semi-circular holes. A gantry (43) is installed at the top of the movable bottom frame (41). A hydraulic rod (44) is installed on one side of the gantry (43), and the hydraulic rod (44) is connected to the movable top frame (42). The movable bottom frame (41) is slidably connected to the detection table (1).

2. The concrete stress measuring device according to claim 1, wherein: The concrete test box (2) includes a box body frame (21). Inside the box body frame (21), a box body bottom plate (22) is movably installed, and a box body side plate (23) is movably installed on the upper side of the box body bottom plate (22).

3. A concrete stress measurement device according to claim 2, characterized in that: A first rotating screw (24) penetrates through the bottom end of the box body frame (21), and the other end of the first rotating screw (24) is rotatably connected to the box body bottom plate (22). The box body bottom plate (22) is slidably connected to the box body frame (21). A box body side frame (25) is installed on the side of the box body frame (21). A second rotating screw (26) penetrates through the inside of the box body side frame (25), and the other side of the second rotating screw (26) is connected to the box body side plate (23).

4. A concrete stress measuring device according to claim 2, characterized in that: Vertically arranged chutes are provided on the side of the box body side plate (23), and a slider (27) slides on one side of the chute, and the slider (27) is connected to the second rotating screw (26).

5. The concrete stress measuring device according to claim 2, characterized in that: A heightening plate (28) is installed at the top of the box body frame (21). Semi-circular holes with different diameters are provided at the top of the box body frame (21) and the bottom end of the heightening plate (28). A box body fixing plate (29) is installed on one side of the heightening plate (28).

6. The concrete stress measuring device according to claim 1, characterized in that: The fixed frame (3) includes a fixed bottom frame (31). A fixed top frame (32) is installed on the upper side of the fixed bottom frame (31). Semi-circular holes with different apertures are evenly provided inside the fixed bottom frame (31) and the fixed top frame (32), and anti-slip pads are installed inside the semi-circular holes. A fixed bolt (33) is installed inside the fixed top frame (32).

7. A concrete stress measuring device according to claim 1, characterized in that: The movable frame (4) includes a sliding control structure (45). The sliding control structure (45) includes a pull rod (451). The pull rod (451) is connected to the movable bottom frame (41). The bottom end of the movable bottom frame (41) slides on the detection table (1) through a slider and a chute, and a return spring (452) is installed inside the chute.

8. A concrete stress measuring device according to claim 7, characterized in that: The pull rod (451) is a threaded rod, and both sides of the pull rod (451) are connected to the detection table (1) through rotating seats (453). A worm gear (454) is installed on one side of the pull rod (451). A worm (455) meshes with one side of the worm gear (454), and the worm (455) is installed at the end of the main shaft of a control motor (456).

9. The concrete stress measuring device according to claim 7, characterized in that: On both sides of the movable chassis (41), a limiting structure (46) is also installed. The limiting structure (46) includes a limiting hole (461), and a limiting plate (462) is installed inside the limiting hole (461). The limiting plate (462) is located on both sides of the movable chassis (41).

10. The concrete stress measuring device according to claim 9, characterized in that: A screw rod (463) is installed inside the movable chassis (41) in a spiral manner, and the screw rod (463) is located in the middle of the limiting plates (462) on both sides.

Images