Local bearing capacity testing equipment for round steel tube coal gangue concrete short column
By designing a detachable multi-diameter indenter head and hydraulic system, the partial bearing capacity testing equipment for coal gangue concrete short columns of round steel pipes is solved, and the bearing capacity testing of different positions of the same test sample is realized, which improves the versatility and flexibility of the equipment.
Patent Information
- Application Number
- CN202422281418.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The indentation diameter of existing steel pipe concrete testing equipment is single, which cannot fully reflect the bearing capacity of different positions of the same test sample, and is poor in versatility and adaptability, making it difficult to meet different testing needs.
A local bearing capacity testing equipment for coal gangue concrete short columns of round steel pipes was designed, using a detachable multi-diameter press head and hydraulic system. The bearing capacity test was carried out at different positions through the hydraulic cylinder driving press head, and data was recorded in combination with sensors.
The bearing capacity test of different locations of the same test sample is realized, which improves the versatility and adaptability of the equipment, and enhances the flexibility and accuracy of the test.
Smart Images
Figure CN223139249U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing capacity testing of concrete-filled steel tubes, and specifically relates to a local bearing capacity testing device for a short column of circular steel tube gangue concrete. Background Technique
[0002] Concrete-filled steel tube is to pour concrete into the steel tube and tamp it to increase the strength and stiffness of the steel tube. In the construction industry, gangue concrete, as a new type of building material, has the advantages of light weight, high strength, good heat insulation performance, etc., and is widely used in various building structures. However, the local bearing capacity of the gangue concrete structure is an important indicator to measure its safety performance. In order to ensure the safety and reliability of the gangue concrete structure in practical applications, it is necessary to conduct local bearing capacity tests on short columns of gangue concrete.
[0003] Currently, when testing the ultimate bearing capacity of conventional concrete-filled steel tubes, it is often necessary to place the concrete-filled steel tube on a stamping machine for testing. This testing device has certain limitations. For example, the diameter of the testing indenter is single, and it is impossible to test the bearing capacity at different positions of the same test sample, resulting in the test results not being able to fully reflect the bearing capacity of the structure in different regions. In addition, the versatility and adaptability of existing equipment are poor, and it is difficult to meet different test requirements. Content of the Utility Model
[0004] To solve the above problems, that is, to solve the problems raised in the above background technique, the utility model proposes a local bearing capacity testing device for a short column of circular steel tube gangue concrete, which includes a base and a U-shaped frame. The U-shaped frame is arranged on the upper side of the base. One end of the upper side of the base is provided with a group of grooves, and a group of indenters are respectively placed in the corresponding grooves. Each indenter is composed of a pressing plate and a mounting column. The pressing plate diameters of a group of indenters decrease in sequence. A group of grooves match the pressing plate diameters of a group of indenters. An annular groove is provided in the middle of each mounting column. A downward pressing test structure is installed on the U-shaped frame, and a structure for disassembling and assembling the indenter is installed on the lower side of the downward pressing test structure;
[0005] The downward pressing test structure includes a hydraulic cylinder, a pair of guide rods, a mounting plate, a sensor, a pair of sliding rods, a display screen, a pair of stoppers and a straight groove plate;
[0006] The hydraulic cylinder is arranged on the upper side of the cross plate of the U-shaped frame. The output end of the hydraulic cylinder passes through the U-shaped frame and is fixedly connected to the mounting plate. Both ends of the upper side of the mounting plate are fixedly connected to the guide rods respectively. The upper ends of a pair of the guide rods pass through the cross plate of the U-shaped frame. The display screen is arranged on one side of the mounting plate. The upper ends of a pair of sliding rods pass through the mounting plate and are fixedly connected to the corresponding stoppers respectively. The lower ends of a pair of the sliding rods are fixedly connected to the straight groove plate. The sensor is arranged on the upper side of the straight groove plate and is located below the mounting plate.
[0007] A further setting of the present utility model is that: the press head disassembly and assembly structure includes a lead screw, a knob, a pair of sliders, a pair of L-shaped rods and a sleeve;
[0008] The middle part of the lower side of the straight groove plate is fixedly connected to the sleeve. Corresponding guide holes are provided on both sides of the sleeve. One end of the lead screw is respectively connected to the two ends of the straight groove plate by bearings. The lead screw has two threads with opposite helix directions. One end of the lead screw passes through the straight groove plate and is fixedly connected to the knob. A pair of sliders are slidably arranged in the straight groove plate. Both ends of the lead screw are respectively threadedly connected to the corresponding sliders. The lower sides of a pair of the sliders are respectively fixedly connected to the corresponding L-shaped rods. The opposite ends of the cross bars of a pair of the L-shaped rods are respectively aligned with the corresponding guide holes.
[0009] A further setting of the present utility model is that: the opposite ends of the cross bars of a pair of the L-shaped rods are both arc-shaped surfaces, and the arc-shaped surfaces are matched with the annular grooves of each mounting column.
[0010] A further setting of the present utility model is that: hard rubber layers are coated on the opposite sides of the arc-shaped surfaces of a pair of the L-shaped rods.
[0011] A further setting of the present utility model is that: the sensor is an S-type tension and compression sensor, and the model is LFS-02.
[0012] The beneficial technical effects of the present utility model are as follows: the present utility model can perform bearing capacity tests on coal gangue concrete short column test samples with different diameters through press heads with different diameters. After selecting a press head, bearing capacity tests are carried out on different positions of the same test sample, which helps to understand whether there are differences in the bearing capacity of the structure in different regions. This device can select a press head with a suitable diameter according to the test requirements, improving the versatility and adaptability of the equipment. Press heads with multiple diameters are all detachable, increasing the flexibility of the test. Description of the Drawings
[0013] Figure 1 Shows the three-dimensional structural schematic diagram of the present utility model Figure 1 。
[0014] Figure 2 Shows the three-dimensional structural schematic diagram of the present utility model Figure 2。
[0015] Figure 3 Shows the three-dimensional structural schematic diagram of the present utility model Figure 3 。
[0016] Figure 4 Shows the partial structural schematic diagram of the present utility model.
[0017] Reference numerals in the drawings: 1, hydraulic cylinder; 2, guide rod; 3, mounting plate; 4, U-shaped frame; 5, pressing head; 6, sleeve; 7, L-shaped rod; 8, straight groove plate; 9, sensor; 10, slide rod; 11, display screen; 12, short column to be measured; 13, slider; 14, mounting column; 15, lead screw. Specific embodiments
[0018] The following will refer to the attached Figures 1 - 4 to describe the preferred embodiments of the present utility model. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.
[0019] The present utility model provides a device for testing the local bearing capacity of a short column of circular steel pipe coal gangue concrete. Before use, the output end of the hydraulic cylinder 1 is in a contracted state, a pair of L-shaped rods 7 are located at the position with the farthest relative distance, the lower sides of a pair of stoppers are attached to the upper side of the mounting plate 3, and there is a gap between the sensor 9 and the mounting plate 3. As Figure 1 shown, when using this device, select a group of short columns of circular steel pipe coal gangue concrete (hereinafter collectively referred to as the short columns 12 to be measured), select a pressing head 5 with a suitable diameter according to the test requirements of the short columns 12 to be measured (since the contact area between the pressing plate 5 and the short columns 12 to be measured is different when the diameter of the pressing plate 5 is different, the larger the diameter, the larger the contact area, and the smaller the pressure (i.e., pressure) per unit area; conversely, the smaller the diameter, the smaller the contact area, and the larger the pressure (i.e., pressure) per unit area. The change in the contact area will affect the distribution of the pressure. A larger pressing plate 5 will make the pressure distribution more uniform, and a smaller pressing plate 5 will make the pressure distribution more concentrated. Therefore, a pressing head 5 with a suitable diameter can be selected according to the required local range of the bearing capacity test). Insert the upper end of the mounting column 14 of a pressing head 5 into the sleeve 6, rotate the knob, the knob drives the lead screw 15 to rotate, the lead screw 15 drives a pair of sliders 13 to slide towards each other inside the straight groove plate 8, and a pair of sliders 13 drive the corresponding L-shaped rods 7 to slide towards each other. The opposite ends of the crossbars of a pair of L-shaped rods 7 respectively pass through the corresponding guide holes and are clamped into the annular grooves of the mounting column 14. When the opposite ends of the crossbars of a pair of L-shaped rods 7 are closely attached to the annular grooves of the mounting column 14, stop rotating the knob. At this time, a pressing head 5 is fixed in the sleeve 6. As Figure 2As shown, place the short column 12 to be measured on the base, move the position to be measured of the short column 12 to below the indenter 5, start the hydraulic cylinder 1, the output end of the hydraulic cylinder 1 extends to drive the mounting plate 3 to slide downward, the mounting plate 3 drives a pair of guide rods 2 to slide downward, the mounting plate 3 drives the indenter 5 to slide downward through a pair of slide rods 10 and a straight groove plate 8, etc. When the lower side of the indenter 5 fits against the upper side of the short column 12 to be measured, the output end of the hydraulic cylinder 1 continues to extend, and the indenter 5 drives the sensor 9 and a pair of slide rods 10 to slide upward through the straight groove plate 8. When the upper side of the sensor 9 fits against the mounting plate 3, the display screen 11 starts to display the pressure data of the sensor 9. The output end of the hydraulic cylinder 1 continues to extend to gradually apply a load until the point to be measured of the sample 12 to be measured is damaged, then turn off the hydraulic cylinder 1, record the bearing capacity data displayed on the display screen 11 at this time, start the hydraulic cylinder 1 again to raise the indenter 5, place the next sample 12 to be measured, and conduct a bearing capacity test on another local position of the next sample 12 to be measured. The operation process is the same and will not be elaborated here. It achieves the purpose of conducting bearing capacity tests on different positions of the same type of test sample, records the bearing capacities of different positions, and helps to understand whether there are differences in the bearing capacities of the structure in different regions. This device is convenient for conducting bearing capacity tests on coal gangue concrete short column test samples with different diameters, and the indenter 5 with an appropriate diameter can be selected according to the test requirements, improving the versatility and adaptability of the equipment. The indenters 5 with multiple diameters are all detachable, increasing the flexibility of the test.
[0020] Although the present utility model has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
[0021] In the description of the present utility model, the terms indicating directions or position relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0022] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0023] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or apparatus / device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent in these processes, articles, or apparatus / devices.
[0024] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.
Claims
1. A local bearing capacity testing device for a short circular steel tube coal gangue concrete column, comprising a base and a U-shaped frame (4), characterized in that: The U-shaped frame (4) is arranged on the upper side of the base. One end of the upper side of the base is provided with a group of grooves, and a group of pressing heads (5) are respectively placed in the corresponding grooves. Each pressing head (5) is composed of a pressing plate and a mounting column (14). The diameters of the pressing plates of the group of pressing heads (5) decrease in sequence. The group of grooves match the diameters of the pressing plates of the group of pressing heads. An annular groove is provided in the middle of each mounting column (14). A downward pressing test structure is installed on the U-shaped frame (4), and a pressing head dismounting and assembling structure is installed under the downward pressing test structure; The downward pressing test structure includes a hydraulic cylinder (1), a pair of guide rods (2), a mounting plate (3), a sensor (9), a pair of sliding rods (10), a display screen (11), a pair of stoppers and a straight groove plate (8); The hydraulic cylinder (1) is arranged on the upper side of the cross plate of the U-shaped frame (4). The output end of the hydraulic cylinder (1) passes through the U-shaped frame (4) and is fixedly connected to the mounting plate (3). The two ends of the upper side of the mounting plate (3) are respectively fixedly connected to the guide rods (2). The upper ends of the pair of guide rods (2) pass through the cross plate of the U-shaped frame (4). The display screen (11) is arranged on one side of the mounting plate (3). The upper ends of the pair of sliding rods (10) pass through the mounting plate (3) and are fixedly connected to the corresponding stoppers. The lower ends of the pair of sliding rods (10) are fixedly connected to the straight groove plate (8). The sensor (9) is arranged on the upper side of the straight groove plate (8). The sensor (9) is located below the mounting plate (3).
2. The local bearing capacity testing device for a short circular steel pipe coal gangue concrete column according to claim 1, characterized in that: The pressing head dismounting and assembling structure includes a lead screw (15), a knob, a pair of sliders (13), a pair of L-shaped rods (7) and a sleeve (6); The middle part of the lower side of the straight groove plate (8) is fixedly connected to the sleeve (6). Corresponding guide holes are provided on both sides of the sleeve (6). One end of the lead screw (15) is respectively connected to the two ends of the straight groove plate (8) by bearings. The lead screw (15) has two threads with opposite helix directions. One end of the lead screw (15) passes through the straight groove plate (8) and is fixedly connected to the knob. The pair of sliders (13) are slidably arranged in the straight groove plate (8). The two ends of the lead screw (15) are respectively threadedly connected to the corresponding sliders (13). The lower sides of the pair of sliders (13) are respectively fixedly connected to the corresponding L-shaped rods (7). The opposite ends of the cross bars of the pair of L-shaped rods (7) are respectively aligned with the corresponding guide holes.
3. The local bearing capacity testing device for a short circular steel tube coal gangue concrete column according to claim 2, characterized in that: The opposite ends of the cross bars of the pair of L-shaped rods (7) are both arc-shaped surfaces, and the arc-shaped surfaces match the annular grooves of each mounting column (14).
4. A local bearing capacity testing device for a short circular steel pipe coal gangue concrete column according to claim 3, characterized in that: Hard rubber layers are coated on the opposite sides of the arc-shaped surfaces of the pair of L-shaped rods (7).