A mechanical property testing device

Abstract

This utility model relates to the field of anchor mechanical performance testing technology, and more particularly to a mechanical performance testing device, including a gantry frame and a base. The gantry frame is fixed on the base, and a pull-out hydraulic cylinder is installed on its top. A square enclosure is fixed on the base directly below the gantry frame. The lower end of the pull-out hydraulic cylinder is a telescopic end, on which a tension sensor is installed. An anchor clamp for holding the anchor rod is connected to the lower side of the tension sensor. Pressure-applying hydraulic cylinders are installed on the four sides of the enclosure. The telescopic end of the pressure-applying hydraulic cylinder is located inside the enclosure, and a pressure plate is provided on it. A serpentine electric heater is embedded on the side of the pressure plate opposite to the pressure-applying hydraulic cylinder. This utility model can accurately test the anchoring performance of anchor rods under high temperature and high pressure environments. By working in concert with the pull-out hydraulic cylinder and the pressure-applying hydraulic cylinder, a multi-dimensional stress environment simulation is achieved. The electric heater and sensor ensure the authenticity of the test conditions and the accuracy of the data.

Description

Technical Field

[0001] This utility model relates to the field of mechanical performance testing technology for anchor bodies, and more specifically, to a mechanical performance testing device. Background Technology

[0002] Anchor bodies are composite systems used in geotechnical engineering to fix and reinforce structures. Their core function is to transfer external loads to deep, stable strata through the interaction between the anchor bolt (cable) and the surrounding soil and rock, thereby maintaining the stability of the structure. Anchor bodies typically consist of anchor bolts (cables), anchoring agents (such as cement mortar, resin, etc.), and the surrounding soil and rock mass; these three elements work together to form a load-bearing system. Chemical anchors, as a type of anchor body, are frequently used for anchoring building substrates to fasteners. Chemical anchors are composite anchoring materials that use a special chemical adhesive to bond the bolt to a drilled hole in the substrate to achieve anchoring of the fastener. They mainly consist of chemical agents and metal bolts.

[0003] In practical applications, the pull-out resistance, load-bearing capacity, and anchoring effect of chemical anchors need to be evaluated through pull-out testing. However, existing pull-out tests are usually conducted on-site, using pull-out testing machines to test the pull-out resistance of chemical anchors under tensile force. This testing method has significant limitations: firstly, the environment in which chemical anchors operate is at normal temperature and pressure, making it difficult to reflect performance under extreme conditions such as high temperature and high pressure; secondly, dynamic stress loading is difficult to achieve on-site, failing to realistically simulate the pressure exerted by surrounding fasteners after anchoring. These problems result in low applicability of the test results, making it difficult to comprehensively guarantee the anchoring effect of chemical anchors in practical applications.

[0004] Therefore, developing a mechanical performance testing device capable of accurately testing the anchoring performance of anchor bolts under simulated high temperature and high pressure environments has become an urgent problem to be solved. Utility Model Content

[0005] This invention addresses the problem that existing technologies cannot accurately reproduce the testing of anchor bolt anchoring performance under complex working conditions by proposing a mechanical performance testing device. This device can simulate the precise testing of anchor bolt anchoring performance under high temperature and high pressure environments, thus overcoming the technical shortcomings of existing technologies, such as the low applicability of room temperature and pressure testing results and the difficulty in achieving dynamic stress loading.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A mechanical property testing device includes a gantry frame and a base. The gantry frame is fixed on the base, serving as an integral support frame. A pulling hydraulic cylinder is installed on the top of the gantry frame. A square enclosure is fixed on the base directly below the gantry frame, and a touch display is installed at the upper right corner of the enclosure. The lower end of the pulling hydraulic cylinder is a telescopic end, on which a tension sensor is installed. An anchor clamp for holding anchor bolts is connected to the lower side of the tension sensor. Pressure hydraulic cylinders are installed on the four sides of the enclosure. The telescopic end of the pressure hydraulic cylinder is located inside the enclosure and is equipped with a pressure plate. A serpentine electric heater is embedded on the side of the pressure plate opposite to the pressure hydraulic cylinder, and a pressure sensor is embedded in the middle of this side. Two sets of symmetrically arranged pressure frames are longitudinally arranged at the upper end of the enclosure.

[0008] Furthermore, the anchor bolt clamp includes a clamping disc, a clamping plate, and clamping screws. The clamping disc is a hollow disc with an open bottom. Two sets of clamping screws are symmetrically arranged on its annular surface. The clamping screws are connected to the clamping disc by a threaded adjustment. One end of the clamping screw located inside the clamping disc is fixed with an arc-shaped clamping plate that is adapted to the anchor bolt.

[0009] Furthermore, the inner side of the clamping plate is engraved with a grid-like texture for anti-slip purposes;

[0010] The jacket disc has two sets of through observation ports longitudinally opened on its annular surface.

[0011] Furthermore, four sets of positioning corner plates are fixed on the base inside the enclosure, and the four sets of positioning corner plates are in a square structure that is adapted to the enclosure.

[0012] Furthermore, the pressure frame includes upright plates, through slots, crossbeams, adjusting screws, and pressure feet. The upright plates are provided in two sets and symmetrically fixed on the front and rear sides of the upper end of the enclosure plate. Through slots are opened inside the upright plates. Crossbeams are longitudinally arranged in the through slots inside the two sets of upright plates. Two sets of adjusting screws are passed through the crossbeams, and the adjusting screws are adjusted and connected to the crossbeams by threads. Pressure feet are rotatably connected to the lower end of the adjusting screws.

[0013] Furthermore, a sliding groove is provided on the bottom surface of the crossbeam plate at a location corresponding to the through groove, and the sliding groove is engaged and slidably connected to the bottom surface of the through groove.

[0014] Furthermore, the gantry frame is provided with two sets of reinforcing brackets on its rear side, and the rear end face of the gantry frame is fixedly connected to the base through the two sets of reinforcing brackets.

[0015] Furthermore, the pressure-applying hydraulic cylinder is connected to an external hydraulic station via hydraulic pipelines, the touch display integrates data acquisition, processing, and control functions, and the tension sensor, electric heater, and pressure sensor are all electrically connected to the touch display.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the design of the gantry frame, reinforced support and base, this utility model ensures the stability and safety of the entire device during the test process and avoids test errors caused by structural loosening.

[0018] 2. By working in concert with the pulling hydraulic cylinder and the pressurizing hydraulic cylinder, this invention simulates the anchor bolt under multi-dimensional stress conditions, solves the technical defect of the prior art that can only perform loading in a single direction, and improves the authenticity and applicability of the test results.

[0019] 3. By introducing an electric heater, this invention can conduct tests under high-temperature conditions, solving the problem of low applicability of test results at normal temperature and pressure in the prior art, and expanding the application range of the test device.

[0020] 4. Through precise measurements by tension and pressure sensors, this invention ensures the accuracy and reliability of test data, providing a solid foundation for subsequent data analysis. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle.

[0023] Figure 3 This is a schematic diagram of the anchor clamp in this utility model.

[0024] Figure 4 This is a schematic diagram of the chassis and side panels in this utility model.

[0025] Figure 5 This is a top view of the chassis and side panels of this utility model.

[0026] Figure 6 This is a partial structural schematic diagram of the present invention.

[0027] Figure 7 This is a schematic diagram of the pressure plate in this utility model.

[0028] Figure 8 This is a schematic diagram showing the state of the present invention in actual use.

[0029] In the diagram: 1. Gantry frame; 2. Pulling hydraulic cylinder; 3. Reinforcing bracket; 4. Base; 5. Enclosure; 6. Pressure hydraulic cylinder; 7. Tension sensor; 8. Anchor bolt clamp; 81. Jacket plate; 82. Observation port; 83. Clamping plate; 84. Clamping screw; 9. Pressure frame; 91. Vertical plate; 92. Through groove; 93. Crossbeam plate; 94. Adjusting screw; 95. Pressure foot; 96. Slide groove; 10. Positioning angle plate; 11. Pressure plate; 12. Electric heater; 13. Pressure sensor; 14. Touch screen display. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] Example:

[0032] like Figures 1 to 8As shown, a mechanical performance testing device includes a gantry frame 1 and a base 4. The gantry frame 1 is fixed on the base 4, serving as an overall support frame. A pulling hydraulic cylinder 2 is mounted on its top and connected to the base 4 via a reinforcing bracket 3, thus forming a stable structural frame. A square enclosure 5 is fixed on the base 4 directly below it to enclose the test space, reduce external interference, and provide support for the installation of the pressure-applying hydraulic cylinder 6. A touch screen display 14 is installed at the upper right corner. The touch screen display 14 integrates data acquisition, processing, and control functions, and can display parameters such as tension, pressure, and temperature during the test in real time. It also supports user parameter setting and operation via a touch interface. The lower end of the pulling hydraulic cylinder 2 is a telescopic end, on which a tension sensor 7 is mounted to measure the tension value in real time and transmit the data to the touch screen display 14 for display and recording. An anchor clamp 8 is connected to the lower side of the tension sensor 7 to hold the anchor rod to be tested. Pressure hydraulic cylinders 6 are installed on all four sides of the enclosure 5. The telescopic ends of the pressure hydraulic cylinders 6 are located inside the enclosure 5, and pressure plates 11 are mounted on them. The pressure hydraulic cylinders 6 and pressure plates 11 work together to simulate the pressure effect of surrounding fasteners on the anchor rod, thus achieving dynamic stress loading. A serpentine electric heater 12 is embedded on the side of the pressure plate 11 opposite to the pressure hydraulic cylinders 6, which can rapidly heat the test space to simulate a high-temperature environment. The electric heater 12 is connected to a touch display 14, allowing real-time monitoring and adjustment of the temperature via the touch interface. The electric heater 12 uses resistance wire heating and a thermocouple to monitor temperature changes in the test space in real time, ensuring accurate temperature control. A pressure sensor 13 is embedded in the middle of this surface to monitor the pressure value applied by the pressure plate 11 in real time and transmit the data to the touch display 14 for display and recording. The upper end of the enclosure 5 is provided with two sets of symmetrically arranged pressure frames 9, which are used to press and fix the substrate into which the anchor rod is inserted from the top to prevent it from shaking or shifting during the test.

[0033] In this embodiment, the anchor bolt clamp 8 includes a clamping disc 81, a clamping plate 83, and clamping screws 84. The clamping disc 81 is a hollow disc with an open bottom, used to hold the anchor bolt. Two sets of clamping screws 84 are symmetrically arranged laterally on its annular surface, and the clamping screws 84 are connected to the clamping disc 81 by thread adjustment. One end of the clamping screw 84 located inside the clamping disc 81 is fixed with an arc-shaped clamping plate 83 that is adapted to the anchor bolt. By rotating the clamping screw 84, the clamping degree of the clamping plate 83 on the anchor bolt can be adjusted to ensure the connection stability with the anchor bolt, and at the same time, it can adapt to anchor bolts of different diameter specifications.

[0034] In this embodiment, a grid pattern for anti-slip is engraved on the inner side of the clamping plate 83. The grid pattern can increase the friction between the clamping plate 83 and the anchor rod contact surface, making the connection between the two more secure and improving the clamping stability of the clamping plate 83 and the anchor rod.

[0035] In this embodiment, the jacket plate 81 has two sets of through observation ports 82 on its annular surface, which facilitates observation of the position and status of the clamping plate 83 and whether it is stably connected to the anchor rod during use.

[0036] In this embodiment, four sets of positioning angle plates 10 are fixed on the base 4 inside the enclosure 5, and the four sets of positioning angle plates 10 are in a square structure that is adapted to the enclosure 5. The square positioning angle plates 10 can position the substrate such as concrete block into which the anchor rod is inserted from the bottom, preventing it from shaking or shifting during the test.

[0037] In this embodiment, the pressure frame 9 includes a vertical plate 91, a through groove 92, a crossbeam plate 93, an adjusting screw 94, and a pressure foot 95. The vertical plate 91 has two sets and is symmetrically fixed on the front and rear sides of the upper end of the surrounding plate 5. The vertical plate 91 has a through groove 92 inside. The crossbeam plate 93 is longitudinally arranged in the through groove 92 inside the two sets of vertical plates 91. The crossbeam plate 93 can slide along the through groove 92 to adjust the position of the crossbeam plate 93. Two sets of adjusting screws 94 are inserted through the crossbeam plate 93, and the adjusting screws 94 are connected to the crossbeam plate 93 by thread adjustment. The lower end of the adjusting screw 94 is rotatably connected to the pressure foot 95. By rotating the adjusting screw 94, the up and down movement of the pressure foot 95 can be precisely controlled, thereby achieving the pressing and fixing of the substrate through the pressure foot 95.

[0038] In this embodiment, a sliding groove 96 is provided on the bottom surface of the crossbeam plate 93 at a position corresponding to the through groove 92. The sliding groove 96 is engaged and slidably connected with the bottom surface of the through groove 92. The sliding groove 96 can make the crossbeam plate 93 and the vertical plate 91 relatively fixed, preventing them from moving longitudinally in the through groove 92 and preventing them from slipping out of the through groove 92.

[0039] In this embodiment, the pressure-applying hydraulic cylinder 6 is connected to an external hydraulic station via hydraulic lines. Precise control of the force applied to the pressure plate 11 is achieved by adjusting the pressure value output by the hydraulic station. The touchscreen display 14 integrates data acquisition, processing, and control functions, capable of displaying parameters such as tension, pressure, and temperature during the test process in real time, and supporting user parameter settings and operations via the touchscreen interface. The tension sensor 7, electric heater 12, and pressure sensor 13 are all electrically connected to the touchscreen display 14. The pressure sensor 13 can monitor the pressure value applied by the pressure plate 11 in real time and transmit the data to the touchscreen display 14 for display and recording. The tension sensor 7 can measure the tension value in real time and transmit the data to the touchscreen display 14 for display and recording. Simultaneously, the touchscreen display 14 can adjust and monitor the temperature of the electric heater 12.

[0040] The working principle of this mechanical property testing device:

[0041] In practical use, a square substrate, such as a concrete block, is first made. The concrete block is then placed on the base 4 inside the enclosure 5, with its four corners positioned in the four sets of positioning corner plates 10. Two sets of crossbeam plates 93 are then moved to directly above the concrete block. The crossbeam plates 93 are adjusted to the appropriate position, and the adjusting screw 94 is rotated to lower the pressure foot 95 and press it against the upper surface of the substrate, thus securing the substrate and preventing it from shaking or shifting during the test. Next, holes are drilled inside the concrete block, and the anchor rod is anchored in the air using a chemical anchoring agent. After the anchor rod is anchored, the extension end of the pulling hydraulic cylinder 2 is extended downwards, causing the tension sensor 7 and the anchor rod clamp 8 to move downwards, allowing the anchor rod clamp 8 to engage with the upper end of the anchor rod. Then, the clamping screw 84 is rotated, and the clamping plate 83 is moved towards the anchor rod through thread adjustment. The mesh pattern on the inner side of the clamping plate 83 increases friction, clamping and fixing the anchor rod. The observation port 82 on the jacket plate 81 facilitates observation of the position of the clamping plate 83 and its connection status with the anchor rod, ensuring stable clamping and adaptability to anchor rods of different diameters;

[0042] Then, the pressure output of the hydraulic station is adjusted so that the telescopic end of the pressure-applying hydraulic cylinder 6 moves the pressure plate 11 towards the anchor rod, simulating the pressure effect of surrounding fixed components on the anchor rod and achieving dynamic stress loading. The pressure sensor 13 on the pressure plate 11 monitors the pressure value applied by the pressure plate 11 in real time and transmits the data to the touch screen 14 for display and recording. The serpentine electric heater 12 embedded in the pressure plate 11 uses resistance wire heating to heat the concrete block, simulating a high-temperature environment. The electric heater 12 is connected to the touch screen 14 and monitors the temperature change in the test space in real time through thermocouples. Users can monitor and adjust the temperature in real time through the touch interface to ensure the accuracy of temperature control. Then, the pull-out hydraulic cylinder 2 is controlled to retract, driving the tension sensor 7 and the anchor rod clamp 8 to move upward, applying tension to the anchor rod. The tension sensor 7 measures the tension value in real time and transmits the data to the touch screen 14 for display and recording. The touch screen 14 integrates data acquisition, processing, and control functions, displaying parameters such as tension, pressure, and temperature in real time during the test. Users can set and operate parameters through the touch interface to achieve precise control over the test process. The touch display 14 shows the changing trends of parameters such as tension, pressure, and temperature during the test, and the data is saved for subsequent analysis after the test is completed.

[0043] In summary, this invention, through the design of the gantry frame 1, the reinforcing bracket 3, and the base 4, ensures the stability and safety of the entire device during the testing process, avoiding test errors caused by structural loosening. The coordinated operation of the pulling hydraulic cylinder 2 and the pressurizing hydraulic cylinder 6 simulates the anchor bolt under multi-dimensional stress environments, overcoming the technical deficiency of existing technologies that can only perform unidirectional loading, thus improving the authenticity and applicability of the test results. By introducing the electric heater 12, this invention can conduct tests under high-temperature conditions, expanding the application range of the testing device. The precise measurements by the tension sensor 7 and the pressure sensor 13 ensure the accuracy and reliability of the test data.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A mechanical property testing device, characterized in that: The system includes a gantry frame (1) and a base (4). The gantry frame (1) is fixed on the base (4). The gantry frame (1) serves as an overall support frame, with a pulling hydraulic cylinder (2) installed on its top. A square enclosure (5) is fixed on the base (4) directly below it, and a touch display (14) is installed at its upper right corner. The lower end of the pulling hydraulic cylinder (2) is a telescopic end, on which a tension sensor (7) is installed. The lower side of the tension sensor (7) is connected to a clamping device for holding the anchor rod. Anchor bolt clamp (8), pressure hydraulic cylinders (6) are installed on the four sides of the enclosure (5), the telescopic end of the pressure hydraulic cylinder (6) is located inside the enclosure (5), and a pressure plate (11) is provided on it. A serpentine electric heater (12) is embedded on the side opposite to the pressure hydraulic cylinder (6) on the pressure plate (11), and a pressure sensor (13) is embedded in the middle of the surface. Two sets of symmetrically arranged pressure frames (9) are provided longitudinally at the upper end of the enclosure (5).

2. The mechanical property testing device according to claim 1, characterized in that: The anchor bolt clamp (8) includes a clamping disc (81), a clamping plate (83), and a clamping screw (84). The clamping disc (81) is a hollow disc with an open bottom. Two sets of clamping screws (84) are symmetrically arranged on its annular surface. The clamping screws (84) are connected to the clamping disc (81) by thread adjustment. One end of the clamping screw (84) located inside the clamping disc (81) is fixed with an arc-shaped clamping plate (83) that is adapted to the anchor bolt.

3. The mechanical property testing device according to claim 2, characterized in that: The inner side of the clamping plate (83) is engraved with a grid pattern for anti-slip purposes; The jacketed disc (81) has two sets of through observation ports (82) longitudinally opened on its annular surface.

4. The mechanical property testing apparatus according to claim 1, characterized in that: Four sets of positioning corner plates (10) are fixed on the inner side base (4) of the enclosure (5), and the four sets of positioning corner plates (10) are in a square structure that is compatible with the enclosure (5).

5. The mechanical property testing apparatus according to claim 1, characterized in that: The pressure frame (9) includes a vertical plate (91), a through groove (92), a crossbeam plate (93), an adjusting screw (94), and a pressure foot (95). The vertical plate (91) is provided in two sets and is symmetrically fixed on the front and rear sides of the upper end of the enclosure plate (5). The vertical plate (91) is provided with a through groove (92). The two sets of vertical plates (91) are provided with a crossbeam plate (93) in the through groove (92). The crossbeam plate (93) is provided with two sets of adjusting screws (94) through it. The adjusting screws (94) and the crossbeam plate (93) are connected by a threaded adjustment. The lower end of the adjusting screw (94) is rotatably connected to the pressure foot (95).

6. The mechanical property testing apparatus according to claim 5, characterized in that: A sliding groove (96) is provided on the bottom surface of the crossbeam plate (93) at a position corresponding to the through groove (92), and the sliding groove (96) is engaged and slidably connected to the bottom surface of the through groove (92).

7. The mechanical property testing apparatus according to claim 1, characterized in that: The gantry frame (1) is provided with two sets of reinforcing brackets (3) on the rear side, and the rear end face of the gantry frame (1) is fixedly connected to the base (4) through the two sets of reinforcing brackets (3).

8. The mechanical property testing apparatus according to claim 1, characterized in that: The pressure-applying hydraulic cylinder (6) is connected to an external hydraulic station via a hydraulic pipeline. The touch display (14) integrates data acquisition, processing and control functions. The tension sensor (7), electric heater (12) and pressure sensor (13) are all electrically connected to the touch display (14).

Images