Precast beam stress damage detection equipment in complex environment

Abstract

The invention belongs to the technical field of precast beam detection, and particularly relates to precast beam stress damage detection equipment in a complex environment, which comprises two side supporting columns, positioning and clamping devices mounted on the side surfaces of the two side supporting columns, an upper mounting frame mounted above the two side supporting columns, and a pressurizing device mounted above the upper mounting frame. A precast beam body is clamped in the positioning clamping device, a detection device is installed on the periphery of the precast beam body, and a temperature control spraying device is installed between the two side supporting columns. Stress and strength detection of the precast beam body is more comprehensive and specific, a scientific and comprehensive technical basis is provided for precast beam quality evaluation, damage pre-judgment, life prediction and engineering safety guarantee, and improvement of the overall reliability of an engineering structure is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of precast beam testing technology, specifically relating to a precast beam stress damage testing device under complex environments. Background Technology

[0002] Currently, precast beams need to be inspected for appearance, strength, and brittleness before they are put into use. Stress testing is one of the important indicators for the safety inspection of precast beams. There are non-destructive testing and destructive testing methods. Non-destructive testing includes magnetic measurement and X-ray testing, while destructive testing mainly includes the blind hole method. The blind hole method is a relatively accurate testing method. It utilizes the compressive strain effect of strain gauges, and then uses specialized analysis software to convert the strain parameters into stress parameters for output.

[0003] When strain gauges are used for stress testing, a load needs to be applied to the precast beam. After the load is applied to the precast beam, the stress change generated under the load is detected. However, this method of stress testing is only a single dimension for detecting the internal stress of the beam. Changes in humidity and temperature will also affect the stress of the beam, thus affecting the strength of the finished precast beam. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a device for detecting stress damage in precast beams under complex environments.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a precast beam stress damage detection device under complex environment, comprising two side support columns, each side of the two side support columns is equipped with a positioning clamping device, an upper mounting frame is installed above the two side support columns, a pressurizing device is installed above the upper mounting frame, the positioning clamping device holds the precast beam body, a detection device is installed on the outer periphery of the precast beam body, and a temperature-controlled spraying device is installed between the two side support columns.

[0006] Preferably, the detection device includes multiple stress plates, each of which is detachably connected to the outer periphery of the precast beam body, and each of the stress plates is externally connected to a stress detection system.

[0007] Preferably, the temperature-controlled spray device includes two lower extension frames and a water collection component. The two lower extension frames are respectively installed on the side of the side support column away from the positioning and clamping device. A ball screw and a guide rod pass through the two lower extension frames. The water collection component cooperates with the ball screw and the guide rod. A servo motor is installed on the side of one of the lower extension frames. The output end of the servo motor is detachably connected to the end of the ball screw. Spraying mechanisms are installed on both sides of the water collection component. A cavity is opened in the water collection component. A water inlet is opened in the cavity. A water guide pipe is installed between the cavity and the spraying mechanism. A pump is installed on the water guide pipe.

[0008] Preferably, the spraying mechanism includes an electric telescopic rod and a U-shaped limiting frame. The electric telescopic rod is installed on the side of the water collection component. The U-shaped limiting frame is detachably connected to the telescopic end of the electric telescopic rod. An inner connecting seat is installed inside the U-shaped limiting frame near the precast beam body. An arc-shaped groove is opened in the inner connecting seat. A sliding component is fitted in the arc-shaped groove. A spray ring is installed on the side of the sliding component. A spray nozzle is installed and connected to the side of the spray ring. The water guide pipe connects the spray ring and the water collection component.

[0009] Preferably, the inner connecting seat has two through holes on its side, and a bidirectional motor is installed in each of the two through holes. The two output ends of the bidirectional motor are hinged to connectors, and the ends of the connectors are hinged to the side of the spray ring. The bidirectional motors in the inner connecting seats of the two spray mechanisms rotate in opposite directions.

[0010] Preferably, a temperature sensor is installed inside the cavity of the water collection component, and multiple heating elements and multiple cooling elements are installed inside the cavity of the water collection component.

[0011] Preferably, both positioning and clamping devices include a lower fixed plate and a positioning cylinder. The lower fixed plate is installed on the side of the side support column near the precast beam body. The positioning cylinder is installed above the upper mounting frame. Multiple limiting rods are installed between the upper mounting frame and the lower fixed plate. An upper movable plate is installed at the end of the piston rod of the positioning cylinder. The upper movable plate is slidably connected to the multiple limiting rods. The precast beam body is located between the upper movable plate and the lower fixed plate.

[0012] Preferably, the two side support columns have trapezoidal grooves that are narrower at the top and wider at the bottom on their sides near the precast beam body. A connecting plate is installed on the side of the upper movable plate at the corresponding position. Electric inner telescopic rods are installed on both sides of the connecting plate. An inclined block is installed at the end of the telescopic rod of the electric inner telescopic rod. The side of the inclined block away from the electric inner telescopic rod is an inclined surface. The side of the inclined block cooperates with the inner side of the trapezoidal groove.

[0013] Preferably, the pressurizing device includes a stamping cylinder and a pressure plate. The stamping cylinder is installed above the upper mounting frame, and the pressure plate is installed at the end of the piston rod of the stamping cylinder. The pressure plate cooperates with the precast beam body.

[0014] Preferably, the positioning and clamping device is externally connected to a controller, and the pressurizing device, the temperature-controlled spraying device, and the detection device are all communicatively connected to the controller.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: (1) Existing precast beam stress testing can only detect load, temperature and humidity separately. However, this invention uses a positioning clamping device to clamp the precast beam body, a temperature control spray device to adjust the temperature and humidity of the precast beam body, a pressurizing device to adjust the load of the precast beam body, and finally a testing device to obtain the stress detection of the precast beam body. This can more comprehensively and realistically reflect the stress change of the precast beam body under working conditions, making the stress and strength detection of the precast beam body more comprehensive and specific. This provides a scientific and comprehensive technical basis for precast beam quality assessment, damage prediction, life prediction and engineering safety assurance, and helps to improve the overall reliability of the engineering structure. (2) By bringing the U-shaped limiting frames closer together, the spraying components surround the precast beam body, and the spraying components spray the precast beam body. The spraying can change the humidity of the precast beam body. (3) The temperature of the sprayed water can be controlled by temperature sensors, heating elements and cooling elements, thereby controlling the temperature of the surface of the precast beam body; (4) The water accumulation component can move between the two sets of side support columns, driving the spray component to move along the precast beam body, realizing temperature stimulation of the entire beam body, and the spray nozzle sprays the surface of the precast beam body evenly, reducing the influence of factors such as uneven temperature on load change damage detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below: Figure 1 A schematic diagram of the precast beam stress damage detection equipment under complex environment provided in Example 1; Figure 2 Cross-section of precast beam stress damage detection equipment in complex environments Figure 1 ; Figure 3 Cross-section of precast beam stress damage detection equipment in complex environments Figure 2 ; Figure 4 Cross-section of precast beam stress damage detection equipment in complex environments Figure 3 ; Figure 5 A top-view structural cross-sectional view of the side support column in a precast beam stress damage detection device under complex conditions; Figure 6 This is a schematic diagram of the limiting frame in a precast beam stress damage detection device under complex environments. Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0017] Explanation of reference numerals in the attached figures: 1. Side support column; 2. Upper mounting frame; 3. Lower extension frame; 4. Ball screw; 5. Water collection component; 6. Upper movable plate; 7. Lower fixed plate; 8. Electric telescopic rod; 9. Positioning cylinder; 10. Stamping cylinder; 11. Pressure plate; 12. Water guide pipe; 13. U-shaped limit frame; 14. Precast beam body; 15. Limiting rod; 16. Inner connecting seat; 17. Spray ring; 18. Spray nozzle; 19. Connecting piece; 20. Trapezoidal groove; 21. Inclined block; 22. Electric inner telescopic rod. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1 The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 To further describe the present invention, a precast beam stress damage detection device under complex environments, such as... Figures 1-4 As shown, it includes two side support columns 1, each with a positioning clamping device installed on its side. An upper mounting frame 2 is installed above the two side support columns 1, and a pressure device is installed above the upper mounting frame 2. The positioning clamping device holds the precast beam body 14, and a detection device is installed on the outer periphery of the precast beam body 14. A temperature-controlled spraying device is installed between the two side support columns 1.

[0021] like Figure 1 As shown, the detection device includes multiple stress plates, which are detachably connected to the outer periphery of the precast beam body 14, and each stress plate is externally connected to a stress detection system.

[0022] like Figures 1-3As shown, the temperature-controlled spray device includes two lower extension frames 3 and water collection components 5. The two lower extension frames 3 are respectively installed on the side of the side support column 1 away from the positioning clamping device. A ball screw 4 and a guide rod 1 pass through the two lower extension frames 3. The water collection components 5 are all in cooperation with the ball screw 4 and the guide rod 1. A servo motor is installed on the side of one of the lower extension frames 3. The output end of the servo motor is detachably connected to the end of the ball screw 4. Spraying mechanisms are installed on both sides of the water collection components 5. A cavity 1 is opened in the water collection component 5. A water inlet is opened in the cavity 1. A water guide pipe 12 is installed between the cavity 1 and the spraying mechanism. A pump is installed on the water guide pipe 12.

[0023] like Figures 1-3 and Figures 6-7 As shown, the spraying mechanism includes an electric telescopic rod 8 and a U-shaped limiting frame 13. The electric telescopic rod 8 is installed on the side of the water collection component 5. The U-shaped limiting frame 13 is detachably connected to the telescopic rod end of the electric telescopic rod 8. An inner connecting seat 16 is installed inside the U-shaped limiting frame 13 near the precast beam body 14. An arc-shaped groove is opened in the inner connecting seat 16, and a sliding component is fitted in the arc-shaped groove. A spray ring 17 is installed on the side of the sliding component. A spray nozzle 18 is installed and connected to the side of the spray ring 17. A water guide pipe 12 connects the spray ring 17 and the water collection component 5.

[0024] like Figures 1-3 and Figure 6 As shown, the inner connecting seat 16 has two through holes on its side. A bidirectional motor is installed in each of the two through holes. The two output ends of the bidirectional motor are hinged to the connectors 19. The ends of the connectors 19 are hinged to the side of the spray ring 17. The bidirectional motors in the inner connecting seats 16 of the two spray mechanisms rotate in opposite directions.

[0025] like Figures 1-3 As shown, both positioning and clamping devices include a lower fixed plate 7 and a positioning cylinder 9. The lower fixed plate 7 is installed on the side of the side support column 1 near the precast beam body 14. The positioning cylinder 9 is installed above the upper mounting frame 2. Multiple limiting rods 15 are installed between the upper mounting frame 2 and the lower fixed plate 7. An upper movable plate 6 is installed at the end of the piston rod of the positioning cylinder 9. The upper movable plate 6 and the multiple limiting rods 15 are slidably connected. The precast beam body 14 is located between the upper movable plate 6 and the lower fixed plate 7.

[0026] like Figure 4 and Figure 5 As shown, the two side support columns 1 are provided with trapezoidal grooves 20 that are narrow at the top and wide at the bottom on the sides near the precast beam body 14. A connecting plate is installed on the side of the upper movable plate 6 at the corresponding position. Electric inner telescopic rods 22 are installed on both sides of the connecting plate. An inclined block 21 is installed at the end of the telescopic rod of the electric inner telescopic rod 22. The side of the inclined block 21 away from the electric inner telescopic rod 22 is a slope. The side of the inclined block 21 cooperates with the inner side of the trapezoidal groove 20.

[0027] like Figure 1 As shown, the pressurizing device includes a stamping cylinder 10 and a pressure plate 11. The stamping cylinder 10 is installed above the upper mounting bracket 2, and the pressure plate 11 is installed at the end of the piston rod of the stamping cylinder 10. The pressure plate 11 cooperates with the precast beam body 14.

[0028] In this invention, a temperature sensor is installed inside the cavity of the water collection component 5. Multiple heating elements and multiple cooling elements are installed inside the cavity of the water collection component 5. The multiple heating elements are existing heating components that can heat the water inside the cavity of the water collection component 5. The multiple cooling elements are existing cooling components that can cool the water inside the cavity of the water collection component 5.

[0029] In this invention, a groove is provided above the water-collecting component 5, and the limiting frame 13 is located in the groove.

[0030] In this invention, a connection hole is provided above the water collection component 5, which is connected to the cavity 1 and can receive the sprayed water to re-enter the cavity 1. A filter screen is installed at the connection position between the water guide pipe 12 and the water collection component 5 to prevent dirt from re-entering the water guide pipe 12 with the water and causing the water guide pipe 12 to become blocked.

[0031] In this invention, the cavity of the water collection component 5 is filled with water, and the water inlet is connected to the cavity. A plug is detachably connected to the water inlet.

[0032] In this invention, the two sets of limiting frames 13 merge to form a closed rectangular frame, and the two spray rings 17 form a complete circle.

[0033] In this invention, the water-collecting component 5 is located between the ball screw 4 and the guide rod 1, that is, the side support column 1 is located between the ball screw 4 and the guide rod 1.

[0034] In this invention, the bidirectional motor can drive the connector 19 to make the spray ring 17 slide in the arc groove.

[0035] In this invention, the stress gauge can measure the surface strain of the precast beam body 14 under load, temperature and humidity, and can calculate the internal stress by combining the material elastic modulus with the stress detection system.

[0036] In this invention, stress plates are detachably connected to the outer periphery of the precast beam body 14 according to the location to be detected.

[0037] In this invention, the positioning and clamping device is externally connected to a controller, and the pressurizing device, the temperature-controlled spraying device, and the detection device are all communicatively connected to the controller.

[0038] In this invention, the stress detection system, extraction pump, servo motor, electric telescopic rod 8, bidirectional motor, positioning cylinder 9, electric inner telescopic rod 22, stamping cylinder 10, temperature sensor, heating element and cooling element are all connected to the controller.

[0039] The working principle of this invention is as follows: The operator places the precast beam body 14 to be inspected on the lower fixed plate 7 of the two positioning clamping devices. The controller sends a command to the positioning cylinder 9, the positioning cylinder 9 opens, and drives the upper movable plate 6 to move downward along the limit rod 15 until the upper movable plate 6 is in contact with the upper surface of the precast beam body 14. Then the positioning cylinder 9 closes, the electric inner telescopic rod 22 opens, and the electric inner telescopic rod 22 pushes the inclined block 21 to insert into the trapezoidal groove 20 of the side support column 1. By utilizing the cooperation between the inclined surface of the inclined block 21 and the inner side of the trapezoidal groove 20, lateral limiting is achieved, preventing the precast beam body 14 from shifting during load loading or spraying, and completing the stable positioning of the precast beam.

[0040] The servo motor is turned on, driving the ball screw 4 to rotate, which in turn moves the water collection component 5 along the guide rod 1, so that the spraying mechanism covers the detection section of the precast beam body 14. The servo motor is turned off, and the electric telescopic rod 8 is turned on. The electric telescopic rod 8 pushes the two U-shaped limit frames 13 to merge into a closed rectangular frame, and the two spray rings 17 are spliced ​​into a complete circle, wrapping the outer periphery of the precast beam body 14. At this time, the spray nozzle 18 is located on the outer periphery of the precast beam body 14 and at a certain distance from the outer periphery of the precast beam body 14. The electric telescopic rod 8 is turned off, and the extraction pump is turned on, which transports the water in the cavity to the spray ring 17 through the water guide pipe 12. The water is then sprayed onto the surface of the precast beam through the spray nozzle 18, simulating the temperature and humidity effect in actual engineering, and continuously providing a stable temperature and humidity environment for the precast beam body 14. During the spraying process, the bidirectional motor is turned on, and the spray ring 17 is driven to slide in the arc groove through the connector 19, so that it can be evenly sprayed on the precast beam body 14.

[0041] The temperature sensor can monitor the water temperature inside the cavity in real time. The controller activates the heating element or the cooling element according to the detection requirements, i.e., simulating different ambient temperatures: the heating element heats the water, and the cooling element cools the water until the water temperature reaches the set value and stabilizes.

[0042] The controller can set load parameters according to the detection scheme and send instructions to the stamping cylinder 10. The stamping cylinder 10 pushes the pressure plate 11 to move downward and contact the upper surface of the precast beam body 14, gradually applying the set load, that is, simulating the actual stress of the precast beam. During the load application process, the pressure is kept stable to avoid impact load from affecting the detection accuracy.

[0043] The precast beam body 14 generates surface strain under the combined action of load, temperature and humidity. The stress gauges installed on the outer periphery can capture the strain signal in real time and transmit the signal to the stress detection system. After receiving the strain data, the stress detection system combines the elastic modulus of the precast beam material and calculates the actual stress value inside the beam body using the elasticity mechanics formula. In this invention, the above process can be automatically controlled.

[0044] In this invention, the above process can be adjusted according to the on-site conditions.

[0045] As a technical solution of this invention, the provided hardware configuration is merely for facilitating the implementation of specific braking control based on the hardware facilities. How to specifically implement braking control and the braking control method are not the technical problems to be solved or the objects of protection of this invention. Furthermore, the communication methods between the devices all employ existing communication methods and are not the inventive point of this invention.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A precast beam stress damage detection device under complex environment, comprising two side support columns (1), characterized in that, Positioning clamping devices are installed on the sides of both side support columns (1), an upper mounting frame (2) is installed above the two side support columns (1), a pressure device is installed above the upper mounting frame (2), a precast beam body (14) is clamped in the positioning clamping device, a detection device is installed on the outer periphery of the precast beam body (14), and a temperature control spray device is installed between the two side support columns (1).

2. The precast beam stress damage detection equipment under complex environments according to claim 1, characterized in that, The detection device includes multiple stress plates, each of which is detachably connected to the outer periphery of the precast beam body (14), and each of the stress plates is externally connected to a stress detection system.

3. The precast beam stress damage detection equipment under complex environments according to claim 1, characterized in that, The temperature-controlled spray device includes two lower extension frames (3) and a water collection component (5). The two lower extension frames (3) are respectively installed on the side of the side support column (1) away from the positioning clamping device. A ball screw (4) and a guide rod pass through between the two lower extension frames (3). The water collection component (5) is engaged with the ball screw (4) and the guide rod. A servo motor is installed on the side of one of the lower extension frames (3). The output end of the servo motor is detachably connected to the end of the ball screw (4). Spraying mechanisms are installed on both sides of the water collection component (5). A cavity is opened in the water collection component (5), and a water inlet is opened in the cavity. A water guide pipe (12) is installed between the cavity and the spraying mechanism, and a pump is installed on the water guide pipe (12).

4. The precast beam stress damage detection equipment under complex environments according to claim 3, characterized in that, The spraying mechanism includes an electric telescopic rod (8) and a U-shaped limiting frame (13). The electric telescopic rod (8) is installed on the side of the water collection component (5). The U-shaped limiting frame (13) is detachably connected to the telescopic rod end of the electric telescopic rod (8). An inner connecting seat (16) is installed inside the U-shaped limiting frame (13) near the precast beam body (14). An arc-shaped groove is opened in the inner connecting seat (16). A sliding component is fitted in the arc-shaped groove. A spray ring (17) is installed on the side of the sliding component. A spray nozzle (18) is installed and connected to the side of the spray ring (17). The water guide pipe (12) connects the spray ring (17) and the water collection component (5).

5. The precast beam stress damage detection equipment under complex environments according to claim 4, characterized in that, The inner connecting seat (16) has two through holes on its side. Two bidirectional motors are installed in the two through holes. The two output ends of the bidirectional motors are hinged to the connectors (19). The ends of the connectors (19) are hinged to the side of the spray ring (17). The bidirectional motors in the inner connecting seats (16) of the two spray mechanisms rotate in opposite directions.

6. The precast beam stress damage detection equipment under complex environments according to any one of claims 3-5, characterized in that, A temperature sensor is installed inside the cavity of the water collection component (5), and multiple heating elements and multiple cooling elements are installed inside the cavity of the water collection component (5).

7. The precast beam stress damage detection equipment under complex environments according to claim 1, characterized in that, Both positioning and clamping devices include a lower fixed plate (7) and a positioning cylinder (9). The lower fixed plate (7) is installed on the side of the side support column (1) near the precast beam body (14). The positioning cylinder (9) is installed above the upper mounting frame (2). Multiple limiting rods (15) are installed between the upper mounting frame (2) and the lower fixed plate (7). An upper movable plate (6) is installed at the piston rod end of the positioning cylinder (9). The upper movable plate (6) is slidably connected to the multiple limiting rods (15). The precast beam body (14) is located between the upper movable plate (6) and the lower fixed plate (7).

8. The precast beam stress damage detection equipment under complex environments according to claim 7, characterized in that, Both of the two side support columns (1) have trapezoidal grooves (20) that are narrow at the top and wide at the bottom on the side near the precast beam body (14). A connecting plate is installed on the side of the upper movable plate (6) at the corresponding position. Electric inner telescopic rods (22) are installed on both sides of the connecting plate. An inclined block (21) is installed at the telescopic rod end of the electric inner telescopic rod (22). The side of the inclined block (21) away from the electric inner telescopic rod (22) is an inclined surface. The side of the inclined block (21) cooperates with the inner side of the trapezoidal groove (20).

9. The precast beam stress damage detection equipment under complex environments according to claim 1, characterized in that, The pressurizing device includes a stamping cylinder (10) and a pressure plate (11). The stamping cylinder (10) is installed above the upper mounting bracket (2), and the pressure plate (11) is installed at the piston rod end of the stamping cylinder (10). The pressure plate (11) cooperates with the precast beam body (14).

10. The precast beam stress damage detection equipment under complex environments according to claim 1, characterized in that, The positioning and clamping device is externally connected to a controller, and the pressurizing device, temperature-controlled spraying device, and detection device are all communicatively connected to the controller.

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