Self-balancing biaxial loading device for concrete materials based on PLC system

Abstract

The present invention discloses a self-balancing biaxial loading device for concrete materials based on a PLC system, which relates to the field of concrete testing technology. The device includes: a vertical loading device having a vertical pressing portion that selectively moves in the vertical direction; a lateral loading device including a lateral force loading mechanism; a control mechanism that is communicatively connected to the vertical loading device and the lateral force loading mechanism, and the control mechanism controls the operation of the vertical loading device and the lateral force loading mechanism. By providing the control mechanism, the lateral loading device, and the vertical loading device, the control mechanism can accurately control the operation of the lateral force loading mechanism and the vertical pressing portion, which is beneficial to improving the stability of the horizontal load and vertical load applied by the self-balancing biaxial loading device for concrete materials, thereby improving the accuracy and repeatability of the concrete material testing results. In addition, the self-balancing biaxial loading device for concrete materials has a simple structure, which is beneficial to reducing the production cost of the device and the difficulty of concrete material testing.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete testing, in particular to a self-balancing biaxial loading device for concrete materials based on a PLC system. Background Art

[0002] Concrete is widely used in construction, and its mechanical properties directly impact building safety. In practical engineering, concrete structures often experience loads from multiple directions simultaneously, creating a complex stress state. Therefore, studying the mechanical behavior of concrete under biaxial stress is of great significance.

[0003] The existing concrete testing device has a complex structure and applies a horizontal load to the concrete by manually controlling a hydraulic jack. Since the manually applied horizontal load is unstable, the test data results of the concrete testing device are not accurate and have poor repeatability. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a PLC-based self-balancing biaxial loading device for concrete materials, thereby improving the stability of the horizontal and vertical loads applied by the PLC-based self-balancing biaxial loading device for concrete materials, thereby improving the accuracy and repeatability of the detection results of the PLC-based self-balancing biaxial loading device for concrete materials.

[0005] According to an embodiment of the present invention, a self-balancing dual-axis loading device for concrete materials based on a PLC system includes: a support seat, the upper surface of the support seat is used to place the concrete material to be tested; a mounting frame and a vertical loading device, the vertical loading device is provided on the mounting frame and is located above the support seat, the vertical loading device has a vertical pressing portion, and the vertical pressing portion selectively moves along the vertical direction; a lateral loading device, the lateral loading device is placed on the support seat, the lateral loading device includes a first limiting plate, a second limiting plate, a first loading block, a second loading block, a force detection member and a lateral force loading mechanism, the first limiting plate and the second limiting plate are opposite and fixedly connected in the horizontal direction, the first loading block and the second loading block are located on the first limiting plate and the second limiting plate The first loading block is located between the second loading block and the first limiting plate, and the first loading block and the second loading block are spaced apart to form a placement space, the force detection member is assembled between the first limiting plate and the first loading block, and the lateral force loading mechanism is assembled between the second limiting plate and the second loading block; a deformation detection device, the deformation detection device is used to detect the deformation of the concrete material; a control mechanism, the control mechanism is communicatively connected with the vertical loading device, the force detection member, the lateral force loading mechanism and the deformation detection device, the control mechanism is configured to control the vertical loading device and the lateral force loading mechanism to work according to the detection information of the force detection member, and is also configured to determine the parameter performance of the concrete material according to the detection information of the deformation detection device.

[0006] According to the PLC system-based self-balancing biaxial loading device for concrete materials according to an embodiment of the present invention, by providing a control mechanism, a lateral loading device, and a vertical loading device, the control mechanism can accurately control the operation of the lateral force loading mechanism and the vertical pressure-resisting portion, which is beneficial to improving the stability of the horizontal load and the vertical load applied by the performance testing device, thereby improving the accuracy and repeatability of the test results of the performance testing device. In addition, the performance testing device has a simple structure, which is beneficial to reducing the production cost of the performance testing device and the difficulty of testing concrete materials.

[0007] In some embodiments of the present invention, the control mechanism is configured to control the operation of the vertical loading device and the lateral force loading mechanism according to the detection information of the force detection member, including: the control mechanism controls the lateral force loading mechanism to apply horizontal force to the second loading block so that the lateral force loading mechanism is controlled to stop working when the detection information of the force detection member reaches a preset force value, and then the control mechanism controls the vertical loading device to operate so that the vertical pressing part moves downward to press the concrete material, and the control mechanism synchronously controls the lateral force loading mechanism to operate so that the detection information of the force detection member reaches a preset force value, and controls the vertical loading device and the lateral force loading mechanism to stop working when the concrete material is crushed.

[0008] In some embodiments of the present invention, the lateral force loading mechanism is constructed as a jack, and the control mechanism includes a controller, a hydraulic pump and an oil storage cylinder. The hydraulic pump is connected between the oil storage cylinder and the jack. The hydraulic pump is configured to selectively pump the oil in the oil storage cylinder into the jack, or to pump the oil in the jack back into the oil storage cylinder. The controller and the hydraulic pump are communicatively connected to control the operation of the hydraulic pump.

[0009] In some embodiments of the present invention, the control mechanism further includes: a flow rate regulating valve connected between the jack and the hydraulic pump.

[0010] In some embodiments of the present invention, the controller has a parameter setting screen.

[0011] In some embodiments of the present invention, the control mechanism further includes: a cabinet, the controller is fixedly mounted on the cabinet and located above the cabinet, the hydraulic pump is disposed in the cabinet, and the oil storage cylinder is disposed below the cabinet and fixedly connected to the cabinet.

[0012] In some embodiments of the present invention, the lateral loading device also includes: a plurality of connecting rod assemblies, each connecting rod assembly includes a connecting rod, two first threaded sleeves and two second threaded sleeves, the outer peripheral wall of each connecting rod is formed with a first threaded portion and a second threaded portion, the first threaded portion and the second threaded portion are respectively adjacent to the two ends of the corresponding connecting rod, the first limiting plate is formed with a plurality of first through holes, the second limiting plate is formed with a plurality of second through holes, the connecting rod is passed through the corresponding first through holes and the corresponding second through holes, the two first threaded sleeves are assembled on the corresponding first threaded portions and are located on both sides of the first limiting plate, and the two second threaded sleeves are assembled on the corresponding second threaded portions and are located on both sides of the second limiting plate.

[0013] In some embodiments of the present invention, a plurality of connecting rod assemblies are arranged around the first loading block, the second loading block, the force detecting member and the transverse force loading mechanism along the circumference of the first limiting plate.

[0014] In some embodiments of the present invention, the deformation detection device is separated from the support seat, and the deformation detection device includes a first camera, a second camera and an extension rod. The extension rod is used to be installed on the concrete material. The first camera and the extension rod are used to measure the deformation of the concrete material in the extension direction of the extension rod. The second camera is used to measure the deformation of the concrete material on a plane perpendicular to the extension direction of the extension rod.

[0015] In some embodiments of the present invention, the mounting frame includes: a fixed block and multiple mounting columns, the multiple mounting columns are arranged around the support seat, the fixed block is fixed to the multiple mounting columns, the fixed block is located above the vertical loading device, and the vertical loading device is fixed to the fixed block.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 2 is a schematic structural diagram of a self-balancing biaxial loading device for concrete materials based on a PLC system according to an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of a control mechanism (PLC system) according to an embodiment of the present invention;

[0020] Figure 3 1 is a partial structural diagram of a self-balancing biaxial loading device for concrete materials based on a PLC system according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] A self-balancing biaxial loading device 100 for concrete materials based on a PLC system;

[0023] Support seat 1;

[0024] Mounting frame 2; fixing block 21; mounting column 22;

[0025] Vertical loading device 3; vertical pressing portion 31;

[0026] Transverse loading device 4;

[0027] A first limiting plate 41; a second limiting plate 42;

[0028] First loading block 43; second loading block 44; force detection member 45;

[0029] Transverse force loading mechanism 46; jack 47; pipeline 471;

[0030] Connecting rod assembly 48; connecting rod 481; first threaded portion 4811; second threaded portion 4812;

[0031] First threaded sleeve 482; second threaded sleeve 483;

[0032] Deformation detection device 5; first camera 51; second camera 52; extension rod 53;

[0033] Control mechanism 6; controller 61; parameter setting screen 611;

[0034] Hydraulic pump 62; oil storage cylinder 63; flow rate regulating valve 64; cabinet 65;

[0035] Ball hinge 7;

[0036] Concrete material 200. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] Reference below Figure 1-Figure 3 A self-balancing dual-axis loading device 100 for concrete materials based on a PLC system according to an embodiment of the present invention is described. The PLC system, namely a programmable logic controller (PLC) system, is a control system commonly used in industrial automation.

[0039] like Figure 1-Figure 3 As shown, the self-balancing biaxial loading device 100 for concrete materials based on the PLC system according to an embodiment of the present invention includes: a support seat 1, the upper surface of the support seat 1 is used to place the concrete material 200 to be tested; a mounting frame 2 and a vertical loading device 3, the vertical loading device 3 is arranged on the mounting frame 2 and is located above the support seat 1, the vertical loading device 3 has a vertical pressing portion 31, and the vertical pressing portion 31 selectively moves along the vertical direction; a transverse loading device 4, the transverse loading device 4 is placed on the support seat 1, the transverse loading device 4 includes a first limiting plate 41, a second limiting plate 42, a first loading block 43, a second loading block 44, a force detection member 45 and a transverse force loading mechanism 46, the first limiting plate 41 and the second limiting plate 42 are opposite and fixedly connected in the horizontal direction, the first loading block 43 and the second loading block 44 are located at the first limiting plate 41 and the second limiting plate 42, the first loading block 43 is located between the second loading block 44 and the first limiting plate 41, and the first loading block 43 and the second loading block 44 are spaced apart to form a placement space, the force detection member 45 is assembled between the first limiting plate 41 and the first loading block 43, and the lateral force loading mechanism 46 is assembled between the second limiting plate 42 and the second loading block 44; the deformation detection device 5, the deformation detection device 5 is used to detect the deformation of the concrete material 200; the control mechanism 6, the control mechanism 6 is communicatively connected with the vertical loading device 3, the force detection member 45, the lateral force loading mechanism 46 and the deformation detection device 5, and the control mechanism 6 is configured to control the vertical loading device 3 and the lateral force loading mechanism 46 to work according to the detection information of the force detection member 45, and is also configured to determine the parameter performance of the concrete material 200 according to the detection information of the deformation detection device 5.

[0040] Among them, along the height direction of the concrete material self-balancing dual-axis loading device 100 based on the PLC system, the support base 1 has an upper surface, and the concrete material 200 to be tested can be placed on the upper surface of the support base 1 to improve the stability of the concrete material 200. The mounting frame 2 can be fixed to the ground or the testing table. As some embodiments of the present application, the vertical loading device 3 and the mounting frame 2 can be connected by bolts. As some embodiments of the present application, the vertical loading device 3 and the mounting frame 2 can be connected by snapping. Along the height direction of the concrete material self-balancing dual-axis loading device 100 based on the PLC system, the vertical loading device 3 is located above the support base 1.

[0041] The vertical loading device 3 can be selected according to actual detection requirements. The vertical loading device 3 has a vertical pressing part 31, and the vertical pressing part 31 is arranged toward the support seat 1 along the height direction of the concrete material self-balancing dual-axis loading device 100 based on the PLC system.

[0042] The lateral loading device 4 is placed on the support seat 1 to improve the stability of the lateral loading device 4, so that the lateral loading device 4 can stably apply a lateral load to the concrete material 200. In the horizontal direction, the first limiting plate 41 and the second limiting plate 42 are arranged relative to each other, and the first limiting plate 41 and the second limiting plate 42 are fixedly connected. As some embodiments of the present application, the first limiting plate 41 and the second limiting plate 42 can be fixedly connected by long bolts. As some embodiments of the present application, the first limiting plate 41 and the second limiting plate 42 can be fixedly connected by a connecting rod. It should be noted that along the thickness direction of the first limiting plate 41 or the thickness direction of the second limiting plate 42, the projections of the first limiting plate 41 and the second limiting plate 42 overlap or at least partially overlap.

[0043] Horizontally, the first limiting plate 41 and the second limiting plate 42 are spaced apart to form an assembly space for assembling the first loading block 43 and the second loading block 44. The first loading block 43 and the second loading block 44 are located in the assembly space between the first limiting plate 41 and the second limiting plate 42. The first loading block 43 is located between the second loading block 44 and the first limiting plate 41. In other words, the first limiting plate 41, the first loading block 43, the second loading block 44, and the second limiting plate 42 are arranged in this order horizontally. The provision of the first loading block 43 and the second loading block 44 reduces the risk of interference between the jack 47 and the vertical pressure portion 31 when directly applying a load. In the horizontal direction, the first loading block 43 and the second loading block 44 are spaced apart to form a placement space between the first loading block 43 and the second loading block 44. The concrete material 200 can be placed in the placement space so that both the vertical loading device 3 and the horizontal loading device 4 can apply loads to the concrete material 200, thereby simulating the mechanical behavior of the concrete material 200 under a biaxial stress state and achieving the effect of testing the performance of the concrete material 200.

[0044] As some embodiments of the present application, the force detection member 45 can be constructed as a force sensor. The force detection member 45 can be fixed to the first limit plate 41, for example: the force detection member 45 can be fixed to the first limit plate 41 by means of, but not limited to, bolts, clamping, etc., so that the force detection member 45 is assembled between the first limit plate 41 and the first loading block 43. As some embodiments of the present application, the lateral force loading mechanism 46 can be constructed as a hydraulic press. As some embodiments of the present application, the lateral force loading mechanism 46 can be constructed as a jack 47. The lateral force loading mechanism 46 can be fixed to the second limit plate 42, for example: the lateral force loading mechanism 46 can be fixed to the second limit plate 42 by means of, but not limited to, bolts, clamping, etc., so that the lateral force loading mechanism 46 can be assembled between the second limit plate 42 and the second loading block 44.

[0045] In some embodiments of the present application, the deformation detection device 5 can be constructed as a camera. In some embodiments of the present application, the deformation detection device 5 can be constructed as a deformation sensor. The deformation detection device 5 is used to detect the deformation of the concrete material 200. The deformation detection device 5 can detect the deformation of the concrete material 200 in multiple directions. The deformation of the concrete material 200 can reflect the mechanical behavior of the concrete material 200 under a biaxial stress state. The control mechanism 6 (i.e., the PLC system of the present application) is communicatively connected to the vertical loading device 3, the force detection member 45, the lateral force loading mechanism 46, and the deformation detection device 5. In some embodiments of the present application, the control mechanism 6 can be connected to the vertical loading device 3, the force detection member 45, the lateral force loading mechanism 46, and the deformation detection device 5 via Bluetooth. In some embodiments of the present application, the control mechanism 6 can be connected to the vertical loading device 3, the force detection member 45, the lateral force loading mechanism 46, and the deformation detection device 5 via WLAN (wireless local area network). The control mechanism 6 can control the vertical loading device 3 and the lateral force loading mechanism 46 based on the detection information of the force detection member 45, thereby controlling the vertical pressing portion 31 to apply a vertical load to the concrete material 200 and the lateral force loading mechanism 46 to apply a lateral load to the concrete material 200. The deformation detection device 5 can transmit the detection information to the control mechanism 6, so that the control mechanism 6 can determine the deformation parameter performance of the concrete material 200 based on the detection information of the deformation detection device 5.

[0046] Specifically, the control mechanism 6 can be constructed as a programmable logic controller 61 (PLC). When it is necessary to detect the concrete material 200, the concrete material 200 (for example, the concrete material 200 can be 100mm) 3A concrete cube test block (e.g., a concrete material 200) is placed in the placement space. Furthermore, the concrete material 200 is placed in or approximately in the center of the placement space. A set horizontal load value (e.g., 80 kN) and an error adjustment value (e.g., 1 kN) are input into the control mechanism 6. The control mechanism 6 then controls the lateral loading device 4 to operate, causing the lateral force loading mechanism 46 to rise, thereby applying a lateral load to the concrete material 200. The force detection member 45 can then provide real-time feedback of the pressure value it reads to the control mechanism 6.

[0047] When the error between the set horizontal load value and the feedback value is less than 1 kN, that is, the feedback value is within the range of 79 kN-81 kN, the control mechanism 6 controls the lateral loading device 4 to stop working, and controls the vertical loading device 3 to apply a vertical load. At this time, the concrete material 200 will expand in the horizontal direction, thereby increasing the horizontal load of the concrete material 200. The force detection component 45 can continue to feed back the read pressure value to the control mechanism 6 in real time. When the feedback value exceeds the set horizontal load value, the control mechanism 6 controls the lateral force loading mechanism 46 to retract, thereby reducing the horizontal load of the concrete material 200 until it falls back to the range of 79 kN-81 kN. The horizontal load of the concrete material 200 is controlled to remain constant until the concrete material 200 is damaged.

[0048] It should be noted that during the measurement process, a friction-reducing gasket (for example, made of polyethylene plastic film) can be set between the concrete material 200 and the first loading block 43, the second loading block 44, the support seat 1 and the vertical pressure part 31 to effectively eliminate the friction effect and further improve the accuracy of the detection results.

[0049] During this process, the control mechanism 6 can determine the relationship between the load force and time experienced by the concrete material 200 based on the detection information fed back by the force detection element 45. The deformation detection device 5 can detect the deformation of the concrete material 200 in multiple directions and feed the deformation information back to the control mechanism 6. Based on the detection information fed back by the deformation detection device 5, the control mechanism 6 can determine the relationship between the deformation of the concrete material 200 and time. Based on the relationship between the load force and time of the concrete material 200 and the relationship between the deformation and time, the control mechanism 6 can calculate the relationship between the load force and deformation of the concrete material 200, thereby accurately detecting the parameter properties of the concrete material 200.

[0050] Therefore, by setting up the control mechanism 6, the lateral loading device 4 and the vertical loading device 3, the control mechanism 6 can accurately control the operation of the lateral force loading mechanism 46 and the vertical pressing part 31, which is beneficial to improving the stability of the horizontal load and the vertical load applied by the self-balancing biaxial loading device 100 for concrete materials based on the PLC system. Moreover, during the measurement process, the error between the actual load value and the feedback value of the concrete is less than 1KN, which can greatly improve the accuracy and repeatability of the detection results of the self-balancing biaxial loading device 100 for concrete materials based on the PLC system. In addition, the self-balancing biaxial loading device 100 for concrete materials based on the PLC system has the advantages of simple structure, easy operation, and low requirements for site and space, which is beneficial to reducing the production cost of the self-balancing biaxial loading device 100 for concrete materials based on the PLC system and the difficulty of detecting concrete materials 200, and has broad application prospects and important practical value.

[0051] In some embodiments of the present invention, Figure 1 As shown, the control mechanism 6 is configured to control the vertical loading device 3 and the lateral force loading mechanism 46 to operate according to the detection information of the force detection member 45, including: the control mechanism 6 controls the lateral force loading mechanism 46 to apply a horizontal force to the second loading block 44 so that when the detection information of the force detection member 45 reaches a preset force value, the lateral force loading mechanism 46 is controlled to stop operating, and then the control mechanism 6 controls the vertical loading device 3 to operate so that the vertical pressing portion 31 moves downward to press against the concrete material 200, and the control mechanism 6 synchronously controls the lateral force loading mechanism 46 to operate so that the detection information of the force detection member 45 reaches a preset force value, and controls the vertical loading device 3 and the lateral force loading mechanism 46 to stop operating when the concrete material 200 is crushed.

[0052] The control mechanism 6 can be constructed as a programmable logic controller 61 (PLC). When the concrete material 200 needs to be inspected, the concrete material 200 (for example, the concrete material 200 can be 100 mm thick) is inspected. 3 A concrete cube test block (e.g., a concrete material 200) is placed in the placement space. Furthermore, the concrete material 200 is placed in or approximately in the center of the placement space. A set horizontal load value (e.g., 80 kN) and an error adjustment value (e.g., 1 kN) are input into the control mechanism 6. The control mechanism 6 then controls the lateral loading device 4 to operate, causing the lateral force loading mechanism 46 to rise and apply a horizontal force to the second loading block 44, thereby applying a lateral load to the concrete material 200. The force detection element 45 can provide real-time feedback of the pressure value it reads to the control mechanism 6.

[0053] When the error between the set horizontal load value and the feedback value is less than 1 kN, that is, the feedback value is within the range of 79 kN-81 kN, the control mechanism 6 controls the lateral loading device 4 to stop working, and controls the vertical loading device 3 to apply a vertical load. At this time, the concrete material 200 will expand in the horizontal direction, thereby increasing the horizontal load of the concrete material 200. The force detection component 45 can continue to feed back the read pressure value to the control mechanism 6 in real time. When the feedback value exceeds the set horizontal load value, the control mechanism 6 controls the lateral force loading mechanism 46 to retract, thereby reducing the horizontal load of the concrete material 200 until it falls back to the range of 79 kN-81 kN. The horizontal load of the concrete material 200 is controlled to remain constant until the concrete material 200 is damaged.

[0054] It should be noted that during the measurement process, a friction-reducing gasket (for example, made of polyethylene plastic film) can be set between the concrete material 200 and the first loading block 43, the second loading block 44, the support seat 1 and the vertical pressure part 31 to effectively eliminate the friction effect and further improve the accuracy of the detection results.

[0055] During this process, the control mechanism 6 can determine the relationship between the load force and time experienced by the concrete material 200 based on the detection information fed back by the force detection element 45. The deformation detection device 5 can detect the deformation of the concrete material 200 in multiple directions and feed the deformation information back to the control mechanism 6. Based on the detection information fed back by the deformation detection device 5, the control mechanism 6 can determine the relationship between the deformation of the concrete material 200 and time. Based on the relationship between the load force and time of the concrete material 200 and the relationship between the deformation and time, the control mechanism 6 can calculate the relationship between the load force and deformation of the concrete material 200, thereby accurately detecting the parameter properties of the concrete material 200.

[0056] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the lateral force loading mechanism 46 is constructed as a jack 47, and the control mechanism 6 includes a controller 61, a hydraulic pump 62 and an oil storage cylinder 63. The hydraulic pump 62 is connected between the oil storage cylinder 63 and the jack 47. The hydraulic pump 62 is configured to selectively pump the oil in the oil storage cylinder 63 into the jack 47, or to pump the oil in the jack 47 back to the oil storage cylinder 63. The controller 61 and the hydraulic pump 62 are communicatively connected to control the operation of the hydraulic pump 62.

[0057] The hydraulic pump 62 is connected to the oil reservoir 63 and the jack 47, so that the hydraulic pump 62 is connected between the oil reservoir 63 and the jack 47. The controller 61 and the hydraulic pump 62 are connected in communication. In some embodiments of the present application, the controller 61 and the hydraulic pump 62 can be connected via Bluetooth. In some embodiments of the present application, the controller 61 and the hydraulic pump 62 can be connected via WLAN (wireless local area network) so that the controller 61 controls the operation of the hydraulic pump 62.

[0058] Specifically, when a lateral load needs to be applied to the concrete material 200, the controller 61 controls the hydraulic pump 62 to operate. The hydraulic pump 62 pumps the oil in the oil reservoir 63 into the jack 47, thereby raising the jack 47 and causing the jack 47 to apply the lateral load to the concrete material 200. When the lateral load on the concrete material 200 needs to be reduced, the controller 61 controls the hydraulic pump 62 to operate. The hydraulic pump 62 pumps the oil in the jack 47 back into the oil reservoir 63, thereby retracting the jack 47 and reducing the lateral load on the concrete material 200.

[0059] By setting up a controller 61 to control the hydraulic pump 62 to selectively pump the oil in the oil storage cylinder 63 into the jack 47, or pump the oil in the jack 47 back to the oil storage cylinder 63, the lateral load on the concrete material 200 can be adjusted, thereby achieving the effect of detecting the parameter performance of the concrete material 200.

[0060] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the control mechanism 6 may further include: a flow rate regulating valve 64 , which is connected between the jack 47 and the hydraulic pump 62 .

[0061] In some embodiments of the present application, the flow rate regulating valve 64 and the jack 47 can be indirectly connected via a pipe 471. In some embodiments of the present application, the flow rate regulating valve 64 and the jack 47 can be directly connected. This application uses the example of the indirect connection between the flow rate regulating valve 64 and the jack 47 via a pipe 471 as an example to illustrate, so that the flow rate regulating valve 64 is connected between the jack 47 and the hydraulic pump 62, and the flow rate regulating valve 64 can adjust the flow to the jack 47. Furthermore, by changing the opening of the flow rate regulating valve 64, the lifting or retraction speed of the jack 47 can be controlled.

[0062] Specifically, when the flow rate regulating valve 64 is opened at a larger degree, the hydraulic pump 62 pumps more oil from the oil reservoir 63 into the jack 47 per unit time, thereby accelerating the lifting speed or retraction speed of the jack 47. When the flow rate regulating valve 64 is opened at a smaller degree, the hydraulic pump 62 pumps less oil from the oil reservoir 63 into the jack 47 per unit time, thereby slowing down the lifting speed or retraction speed of the jack 47. This facilitates the experimenter to control the lifting or retraction speed of the jack 47 by controlling the opening of the flow rate regulating valve 64 according to specific needs, thereby improving the controllability of the experimental process and further improving the accuracy and repeatability of the test results of the concrete material self-balancing biaxial loading device 100 based on the PLC system.

[0063] In some embodiments of the present invention, Figure 2 As shown, the controller 61 has a parameter setting screen 611.

[0064] In some embodiments of the present application, the parameter setting screen 611 can be configured as a touch screen. In some embodiments of the present application, the parameter setting screen 611 can be configured as a keypad. By setting the parameter setting screen 611, the experimenter can directly set and adjust the various parameters of the controller 61 through a touch screen or key input method, without the need for complex programming or code modification. This improves the intuitiveness, accuracy, and convenience of parameter setting, thereby improving the efficiency of the parameter performance of the concrete material 200. The tester can also use the parameter setting screen 611 to monitor the actual load value of the concrete and the operating status of the PLC-based concrete material self-balancing biaxial loading device 100 in real time. If an abnormality occurs, safety measures can be immediately taken to reduce the risk of accidents during the testing process of the PLC-based concrete material self-balancing biaxial loading device 100, thereby improving the safety of the use of the PLC-based concrete material self-balancing biaxial loading device 100.

[0065] In some embodiments of the present invention, Figure 2 As shown, the control mechanism 6 may further include: a cabinet 65 , a controller 61 fixedly mounted in the cabinet 65 and located above the cabinet 65 , a hydraulic pump 62 disposed in the cabinet 65 , and an oil storage cylinder 63 disposed below the cabinet 65 and fixedly connected to the cabinet 65 .

[0066] Among them, along the height direction of the concrete material self-balancing dual-axis loading device 100 based on the PLC system, the controller 61 is located above the cabinet 65. As some embodiments of the present application, the controller 61 and the cabinet 65 can be welded. As some embodiments of the present application, the controller 61 and the cabinet 65 can be snap-connected. The cabinet 65 can be formed with an assembly position, and the hydraulic pump 62 is set at the assembly position, so that the hydraulic pump 62 is set in the cabinet 65, which is conducive to the stable operation of the hydraulic pump 62 in the cabinet 65, reducing the risk of external environment interfering with the operation of the hydraulic pump 62, thereby reducing the risk of failure of the hydraulic pump 62 to cause the lateral loading device 4 to load the lateral load to the concrete material 200 due to failure of the hydraulic pump 62, and is conducive to improving the working reliability of the hydraulic pump 62 and the lateral loading device 4.

[0067] In some embodiments of the present application, the oil reservoir 63 and the cabinet 65 can be welded. In some embodiments of the present application, the oil reservoir 63 and the cabinet 65 can be snap-fitted. Along the height of the PLC-based self-balancing dual-axis loading device for concrete materials 100, the oil reservoir 63 is positioned below the cabinet 65. That is, along the height of the PLC-based self-balancing dual-axis loading device for concrete materials 100, the controller 61, the cabinet 65, and the oil reservoir 63 are arranged sequentially. This arrangement allows for the optimal positioning of the controller 61 and the oil reservoir 63. Placing the controller 61 at a high location facilitates operator access, thereby reducing the difficulty of using the PLC-based self-balancing dual-axis loading device for concrete materials 100. Because the oil reservoir 63 stores a certain amount of oil and therefore has a relatively large mass, placing the oil reservoir 63 below the cabinet 65 reduces the risk of the oil reservoir 63 crushing the cabinet 65, thereby improving the structural stability of the PLC-based self-balancing dual-axis loading device for concrete materials 100.

[0068] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the lateral loading device 4 can also include: multiple connecting rod assemblies 48, each connecting rod assembly 48 includes a connecting rod 481, two first threaded sleeves 42 and two second threaded sleeves 483, the outer peripheral wall of each connecting rod 481 is formed with a first threaded portion 4811 and a second threaded portion 4812, the first threaded portion 4811 and the second threaded portion 4812 are respectively adjacent to the two ends of the corresponding connecting rod 481, the first limiting plate 41 is formed with a plurality of first through holes, the second limiting plate 42 is formed with a plurality of second through holes, the connecting rod 481 is penetrated by the corresponding first through holes and the corresponding second through holes, the two first threaded sleeves 42 are assembled on the corresponding first threaded portion 4811 and are located on both sides of the first limiting plate 41, and the two second threaded sleeves 483 are assembled on the corresponding second threaded portion 4812 and are located on both sides of the second limiting plate 42.

[0069] In the extending direction of the connecting rod 481, the connecting rod 481 has two opposite ends, and the first threaded portion 4811 and the second threaded portion 4812 are respectively adjacent to the two ends of the corresponding connecting rod 481. The first threaded sleeve 42 is adapted to the first threaded portion 4811, and the second threaded sleeve 483 is adapted to the second threaded portion 4812, so that the first threaded sleeve 42 and the second threaded sleeve 483 can be respectively assembled with the first threaded portion 4811 and the second threaded portion 4812. The connecting rod 481 is provided in the corresponding first through hole and the corresponding second through hole. Furthermore, the first threaded portion 4811 of the connecting rod 481 is provided in the corresponding first through hole, and the second threaded portion 4812 of the connecting rod 481 is provided in the corresponding second through hole.

[0070] The two first threaded sleeves 42 are assembled with the corresponding first threaded portion 4811, and the two first threaded sleeves 42 are respectively located on both sides of the corresponding first limiting plate 41, so that the two first threaded sleeves 42 can limit the first threaded portion 4811 relative to the first limiting plate 41. The two second threaded sleeves 483 are assembled with the corresponding second threaded portion 4812, and the two second threaded sleeves 483 are respectively located on both sides of the corresponding second limiting plate 42, so that the two second threaded sleeves 483 can limit the second threaded portion 4812 relative to the second limiting plate 42, thereby achieving the effect of relative fixation of the first limiting plate 41, the connecting rod 481, and the second limiting plate 42.

[0071] When the jack 47 is lifted, the second limit plate 42 is subjected to the reverse force of the jack 47 in the direction away from the first limit plate 41, and is also subjected to the pulling force in the direction of the first limit plate 41 applied by the first limit plate 41 through the connecting rod 481, so that the second limit plate 42 is subjected to balanced force. Similarly, it can be seen that the first limit plate 41 is also subjected to balanced force, so that when the lateral force loading mechanism 46 is working, the lateral loading device 4 remains stable, reducing the risk of the lateral loading device 4 falling from the support seat 1 and causing the concrete material self-balancing dual-axis loading device 100 based on the PLC system to fail to detect.

[0072] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, a plurality of connecting rod assemblies 48 are arranged around the first loading block 43 , the second loading block 44 , the force detection member 45 and the transverse force loading mechanism 46 along the circumference of the first limiting plate 41 .

[0073] Among them, along the circumference of the first limiting plate 41, multiple connecting rod assemblies 48 are arranged around the first loading block 43, the second loading block 44, the force detection component 45 and the lateral force loading mechanism 46. Such an arrangement can make the positions of the multiple connecting rod assemblies 48 reasonably arranged, which is conducive to the multiple connecting rod assemblies 48 to uniformly play a limiting role along the circumference of the first limiting plate 41 and the second limiting plate 42, reducing the risk of eccentric compression of the concrete material 200, so as to improve the uniformity of the lateral load on the concrete material 200, reduce the risk of local force on the concrete material 200 causing the concrete material 200 to crack too quickly, thereby reducing the risk of the concrete material 200 cracking too quickly and affecting the quality evaluation result of the concrete material 200, which is conducive to improving the accuracy of the performance detection of the concrete material 200.

[0074] Furthermore, as some embodiments of the present application, a ball joint 7 can be provided between the vertical pressure portion 31 and the concrete material 200, and between the first limit plate 41 and the first loading block 43. The ball joint 7 can automatically adjust the contact between the loading plate and the specimen, further reducing the risk of eccentric compression of the concrete material 200.

[0075] In some embodiments of the present invention, Figure 1 As shown, the deformation detection device 5 is separated from the support base 1, and the deformation detection device 5 includes a first camera 51, a second camera 52 and an extension rod 53. The extension rod 53 is used to be installed on the concrete material 200. The first camera 51 and the extension rod 53 are used to measure the deformation of the concrete material 200 along the extension direction of the extension rod 53. The second camera 52 is used to measure the deformation of the concrete material 200 on a plane perpendicular to the extension direction of the extension rod 53.

[0076] The concrete material 200 may be formed with a through hole extending in a first direction, and the extension rod 53 is passed through the through hole so that the extension rod 53 is installed on the concrete material 200. The first camera 51 and the second camera 52 can detect the deformation of the concrete material 200. It should be noted that the detection angle of the first camera 51 and the detection angle of the second camera 52 are perpendicular or approximately perpendicular. When the concrete material self-balancing dual-axis loading device 100 based on the PLC system is as follows Figure 1When placed as shown, the first limit plate 41 will block the concrete material 200. Therefore, by installing the extension rod 53 on the concrete material 200, the first camera 51 can smoothly detect the deformation of the concrete material 200 along the extension direction of the extension rod 53 based on the state of the extension rod 53. The second camera 52 is used to measure the deformation of the concrete material 200 on a plane perpendicular to the extension direction of the extension rod 53, that is, to measure the deformation of the concrete material 200 in the height direction of the PLC system-based concrete material self-balancing dual-axis loading device 100, as well as the deformation of the concrete material 200 in the arrangement direction of the first limit plate 41 and the second limit plate 42. This allows the first camera 51 and the second camera 52 to jointly detect the deformation of multiple surfaces of the concrete material 200, thereby improving the comprehensiveness of the deformation detection of the concrete material 200.

[0077] The first camera 51 and the second camera 52 are both spaced apart from the support base 1 so that the first camera 51 and the second camera 52 can measure the deformation of the concrete material 200 in a non-contact manner. The first camera 51 and the second camera 52 can achieve pixel-level displacement measurement by capturing images of the surface of the concrete material 200 and utilizing image processing technology. The measurement accuracy is much higher than that of traditional contact measurement methods, thereby more accurately reflecting the slight deformation of the concrete material 200. In addition, the non-contact measurement method reduces human intervention and human errors in the measurement process, further improving the reliability of the measurement results.

[0078] In some embodiments of the present invention, Figure 1 As shown, the mounting frame 2 may include: a fixed block 21 and a plurality of mounting columns 22, the plurality of mounting columns 22 are arranged around the support seat 1, the fixed block 21 is fixed to the plurality of mounting columns 22, the fixed block 21 is located above the vertical loading device 3, and the vertical loading device 3 is fixed to the fixed block 21.

[0079] The mounting posts 22 may be provided in a plurality, for example, the mounting posts 22 may be provided in a plurality, but are not limited to, four or six. In some embodiments of the present application, the fixing block 21 and the plurality of mounting posts 22 may be connected by welding. In some embodiments of the present application, the fixing block 21 and the plurality of mounting posts 22 may be connected by bolts so that the fixing block 21 is fixed to the plurality of mounting posts 22. The plurality of mounting posts 22 are arranged around the support base 1 so that the plurality of mounting posts 22 can evenly support the fixing block 21 along the circumference of the support base 1, which is beneficial to improving the stability of the fixing block 21 and reducing the risk of the mounting frame 2 tipping over.

[0080] In some embodiments of the present application, the vertical loading device 3 can be fixed to the fixed block 21 by bolts. In some embodiments of the present application, the vertical loading device 3 can be fixed to the fixed block 21 by welding. Along the height direction of the concrete material self-balancing biaxial loading device 100 based on the PLC system, the fixed block 21 is located above the vertical loading device 3. Such an arrangement can make the arrangement of the vertical loading device 3 reasonable, and is conducive to the vertical pressing portion 31 being able to move toward or away from the support seat 1, thereby achieving the effect of applying a vertical load to the concrete material 200 or reducing the vertical load.

[0081] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A self-balancing biaxial loading device for concrete materials based on a PLC system, characterized in that: include: A support base, the upper surface of which is used to place the concrete material to be tested; a mounting frame and a vertical loading device, wherein the vertical loading device is provided on the mounting frame and located above the support seat, the vertical loading device having a vertical pressing portion, the vertical pressing portion selectively moving in the vertical direction; A lateral loading device, the lateral loading device is placed on the support seat, the lateral loading device includes a first limiting plate, a second limiting plate, a first loading block, a second loading block, a force detection member and a lateral force loading mechanism, the first limiting plate and the second limiting plate are opposite to each other in the horizontal direction and are fixedly connected, the first loading block and the second loading block are located between the first limiting plate and the second limiting plate, the first loading block is located between the second loading block and the first limiting plate, and the first loading block and the second loading block are spaced apart to form a placement space, the force detection member is assembled between the first limiting plate and the first loading block, and the lateral force loading mechanism is assembled between the second limiting plate and the second loading block; A deformation detection device, the deformation detection device is used to detect the deformation of the concrete material; a control mechanism, the control mechanism being in communication with the vertical loading device, the force detection member, the lateral force loading mechanism, and the deformation detection device, the control mechanism being configured to control the vertical loading device and the lateral force loading mechanism based on detection information from the force detection member, and further configured to determine parameter properties of the concrete material based on detection information from the deformation detection device; The lateral loading device further includes: a plurality of connecting rod assemblies, each of the connecting rod assemblies including a connecting rod, two first threaded sleeves and two second threaded sleeves, a first threaded portion and a second threaded portion being formed on an outer peripheral wall of each connecting rod, the first threaded portion and the second threaded portion being adjacent to two ends of the corresponding connecting rod, the first limiting plate being formed with a plurality of first through holes, the second limiting plate being formed with a plurality of second through holes, the connecting rod being passed through the corresponding first through holes and the corresponding second through holes, the two first threaded sleeves being fitted on the corresponding first threaded portion and being located on both sides of the first limiting plate, and the two second threaded sleeves being fitted on the corresponding second threaded portion and being located on both sides of the second limiting plate; The plurality of connecting rod assemblies are arranged around the first loading block, the second loading block, the force detecting member and the lateral force loading mechanism along the circumference of the first limiting plate.

2. The self-balancing biaxial loading device for concrete materials based on the PLC system according to claim 1 is characterized in that: The control mechanism is configured to control the vertical loading device and the lateral force loading mechanism to operate according to the detection information of the force detection member, including: The control mechanism controls the lateral force loading mechanism to apply a horizontal force to the second loading block so that when the detection information of the force detection member reaches a preset force value, the lateral force loading mechanism is controlled to stop working. Then, the control mechanism controls the vertical loading device to work so that the vertical pressing portion moves downward to press against the concrete material. The control mechanism synchronously controls the lateral force loading mechanism to work so that the detection information of the force detection member reaches the preset force value. When the concrete material is crushed, the vertical loading device and the lateral force loading mechanism are controlled to stop working.

3. The self-balancing biaxial loading device for concrete materials based on a PLC system according to claim 1 or 2, characterized in that: The lateral force loading mechanism is constructed as a jack, and the control mechanism includes a controller, a hydraulic pump and an oil storage cylinder. The hydraulic pump is connected between the oil storage cylinder and the jack. The hydraulic pump is configured to selectively pump the oil in the oil storage cylinder into the jack, or pump the oil in the jack back into the oil storage cylinder. The controller and the hydraulic pump are communicatively connected to control the operation of the hydraulic pump.

4. The self-balancing biaxial loading device for concrete materials based on the PLC system according to claim 3 is characterized in that: The control mechanism further includes a flow rate regulating valve connected between the jack and the hydraulic pump.

5. The self-balancing biaxial loading device for concrete materials based on a PLC system according to claim 3 is characterized in that: The controller has a parameter setting screen.

6. The self-balancing biaxial loading device for concrete materials based on a PLC system according to claim 3 is characterized in that: The control mechanism further includes a cabinet, the controller is fixedly mounted on the cabinet and located above the cabinet, the hydraulic pump is arranged in the cabinet, and the oil storage cylinder is arranged below the cabinet and fixedly connected to the cabinet.

7. The self-balancing biaxial loading device for concrete materials based on a PLC system according to claim 1 or 2, characterized in that: The deformation detection device is spaced apart from the support seat, and includes a first camera, a second camera, and an extension rod. The extension rod is used to be installed on the concrete material. The first camera and the extension rod are used to measure the deformation of the concrete material in the extension direction of the extension rod. The second camera is used to measure the deformation of the concrete material on a plane perpendicular to the extension direction of the extension rod.

8. The self-balancing biaxial loading device for concrete materials based on a PLC system according to claim 1 or 2, characterized in that: The mounting frame includes: a fixed block and multiple mounting columns, the multiple mounting columns are arranged around the support seat, the fixed block is fixed to the multiple mounting columns, the fixed block is located above the vertical loading device, and the vertical loading device is fixed to the fixed block.

Images