Concrete crack resistance evaluation device

Abstract

The invention discloses a concrete anti-cracking performance evaluation device, and relates to the technical field of concrete anti-cracking performance evaluation, the concrete anti-cracking performance evaluation device comprises a support frame, hardened glass is mounted on two side surfaces of the support frame, an ultraviolet partition plate is mounted on the upper side of the support frame, a blowing fan is arranged on the hardened glass on one side, and the ultraviolet partition plate is mounted on the other side of the support frame. An electric heating wire is arranged on the side, close to the hardened glass, of the blowing fan. Through the arrangement of the infrared thermal imager, the control module, the electronic scanning mirror, the sliding rail, the sliding seat, the lead screw and the servo motor, the sliding seat moves along the sliding rail, infrared thermal imaging scanning and high-definition shooting can be conducted on the concrete structure wall through the electronic scanning mirror and the infrared thermal imager, the control module can accurately calculate the crack area, and the crack detection accuracy is improved. And thus, the accuracy of test evaluation is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete anti-cracking performance evaluation, in particular to a concrete anti-cracking performance evaluation device. Background Art

[0002] After construction, concrete structures can develop numerous cracks due to internal factors or external interference, reducing the durability of the concrete and hindering the long-term use of concrete components. Therefore, it is particularly important to test and evaluate the crack resistance of concrete.

[0003] Existing methods for testing concrete crack resistance cannot accurately measure the surface crack area of ​​concrete structures or accurately infer the time of concrete crack occurrence, making the accuracy of test evaluation uncertain. Furthermore, existing testing and evaluation devices cannot record the evolution of concrete cracks in real time, making it difficult to review later. Furthermore, existing testing and evaluation devices cannot simulate different environmental conditions. Even when the test environment is changed, the test results are poor, making it impossible to comprehensively and accurately assess concrete crack resistance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a concrete crack resistance evaluation device. By setting an infrared thermal imager, a control module, an electronic scanning mirror, a slide rail, a sliding seat, a screw and a servo motor, the sliding seat can move along the slide rail. The concrete structure wall can be scanned by infrared thermal imaging and high-definition photography through the electronic scanning mirror and the infrared thermal imager. The control module can accurately calculate the crack area, thereby ensuring the accuracy of the test evaluation, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for evaluating the crack resistance of concrete, comprising a support frame, hardened glass being installed on two side surfaces of the support frame, an ultraviolet partition being installed on the upper side of the support frame, a blower fan being provided on the hardened glass on one side, an electric heating wire being provided on the blower fan close to the hardened glass, cylinders being installed on the outside of the four corners of the support frame, universal wheels being connected to the telescopic ends of the cylinders, a water distribution pipe being laterally provided on the inner side of the hardened glass, an atomizing nozzle being installed on the water distribution pipe, a slide rail being installed on the lower side of the ultraviolet partition, a sliding seat being provided in the slide rail, a screw rod being passed through the inner side of the upper part of the sliding seat, one end of the screw rod being connected to a servo motor via a right-angle reducer, an electronic scanning mirror being installed on the lower side of the sliding seat, an infrared thermal imager being provided on the upper side of the electronic scanning mirror, a concrete knife edge constraint tester being provided on the bottom side of the internal space of the support frame, and a blower fan being provided on one side of the concrete knife edge constraint tester.

[0006] Furthermore, a water tank is installed on the side of the hardened glass on the other side, a heating pipe assembly is provided on the bottom side of the water tank, and a pump is provided on a side of the lower part of the water tank.

[0007] Furthermore, a control module is provided on the outer side of the water tank, the water outlet of the pump is connected to the main water pipe, and an exhaust valve is provided at the center of the upper side of the ultraviolet baffle.

[0008] Furthermore, a wind speed sensor is provided on the inner side of the support frame near the blower fan, and a temperature and humidity sensor is installed on the main water pipe in the vertical part.

[0009] Furthermore, the temperature and humidity sensor, the wind speed sensor, the infrared thermal imager, the heating tube assembly and the electric heating wire are all connected to the control module.

[0010] Furthermore, a valve is provided between the water distribution pipe and the atomizing nozzle, and the sealing buckle plate is a split structure.

[0011] Furthermore, sealing buckle plates are provided on the other two side surfaces of the support frame, and a sealing gasket is clamped between the sealing buckle plate and the support frame, the bottom of the sealing buckle plate is clamped in the limiting groove of the support frame, and elastic pins are fixedly connected on both sides of the sealing buckle plate on the support frame, and a blocking block is provided on the sealing buckle plate at the elastic pins.

[0012] Furthermore, the elastic pin includes a support block, a slider slidably arranged in the inner hole of the support block, a spring clamped between the slider and the inner hole of the support block, and a spherical clamp fixed on one side of the slider and passing through the support block, and the clamping block is provided with a clamping hole that cooperates with the spherical clamping head.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This invention uses an infrared thermal imager, a control module, an electronic scanning mirror, a slide rail, a sliding seat, a screw and a servo motor to enable the sliding seat to move along the slide rail. The electronic scanning mirror and the infrared thermal imager can be used to perform infrared thermal imaging scanning and high-definition photography of concrete structure walls. The control module can accurately calculate the crack area, thereby ensuring the accuracy of the test evaluation.

[0015] 2. The invention uses an electronic scanning mirror and an infrared thermal imager to record the process of concrete structure cracks in real time, making it convenient for later viewing.

[0016] 3. The invention is equipped with a blower fan, electric heating wire, water tank, heating tube assembly, pump, main water pipe, water distribution pipe, atomizing nozzle, temperature and humidity sensor and wind speed sensor, so that the space inside the support frame can simulate a high temperature and high humidity environment. The device can accurately test and evaluate the crack resistance of concrete under different environments.

[0017] 4. The invention adopts ABS material for the device, which reduces the weight of the device and reduces labor consumption. It is also easy to disassemble and assemble, and convenient for replacing concrete samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention in a separated state;

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the main cross-sectional structure;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of the concrete knife-edge restraint tester;

[0022] Figure 5 This is a cross-sectional view of the sealing gusset plate portion of the present invention;

[0023] Figure 6 It is a cross-sectional view of the elastic pin portion in the present invention.

[0024] In the figure: 1. UV baffle; 2. Exhaust valve; 3. Blower fan; 4. Electric heating wire; 5. Hardened glass; 6. Support frame; 7. Cylinder; 8. Universal wheel; 9. Sealing plate; 10. Heating tube assembly; 11. Water tank; 12. Pump; 13. Main water pipe; 14. Atomizing nozzle; 15. Water distribution pipe; 16. Temperature and humidity sensor; 17. Sliding seat; 18. Electronic scanning mirror; 19. Infrared thermal imager; 20. Servo motor; 21. Slide rail; 22. Screw; 23. Control module; 24. Wind speed sensor; 25. Concrete knife edge constraint tester; 26. Elastic pin; 2601. Support block; 2602. Spring; 2603. Slider; 2604. Ball clamp; 27. Sealing gasket; 28. Clamp; 29. ​​Blower fan. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-6 This embodiment provides a technical solution: a concrete crack resistance performance evaluation device, including a support frame 6, hardened glass 5 is installed on two sides of the support frame 6, sealing panels 9 are provided on the other two sides of the support frame 6, an ultraviolet baffle 1 is installed on the upper side of the support frame 6, a blower fan 3 is provided on one side of the hardened glass 5, an electric heating wire 4 is provided on the side of the blower fan 3 close to the hardened glass 5, cylinders 7 are installed on the four corners of the support frame 6, universal wheels 8 are connected to the telescopic ends of the cylinder 7, and a water distribution pipe 15 is provided laterally inside the hardened glass 5. An atomizing nozzle 14 is installed on the water distribution pipe 15, a slide rail 21 is installed on the lower side of the ultraviolet partition 1, a sliding seat 17 is arranged in the slide rail 21, a screw rod 22 is passed through the inner side of the upper part of the sliding seat 17, one end of the screw rod 22 is connected to the servo motor 20 through a right-angle reducer, an electronic scanning mirror 18 is installed on the lower side of the sliding seat 17, an infrared thermal imager 19 is arranged on the upper side of the electronic scanning mirror 18, a concrete knife edge constraint tester 25 is arranged on the bottom side of the internal space of the support frame 6, and a blowing fan 29 is arranged on one side of the concrete knife edge constraint tester 25.

[0027] like Figure 1-4 As shown, when the crack resistance test of the concrete wall structure is required, the sealing plate 9 is opened, the cylinder 7 lifts the support frame 6, so that the universal wheel 8 is supported on the ground, and then the support frame 6 and the hardened glass 5 can be pushed to move to the upper side of the concrete wall structure as a whole, so that the protective structure formed by the hardened glass 5, the ultraviolet partition 1 and the support frame 6 covers the concrete wall, the blower fan 3 can send air into the test space, the electric heating wire 4 heats the air, so that the device can perform hot air drying on the concrete wall structure to simulate the crack resistance of the concrete structure under high temperature environment, and the pump 12 can pump the water tank 1 1 is pressurized and pumped to the atomizing nozzle 14 through the main water pipe 13 and the water branch pipe 15. The atomizing nozzle 14 sprays water mist to simulate a high-humidity environment, thereby testing and evaluating the crack resistance of the concrete wall structure in a high-humidity environment. The servo motor 20 can drive the screw 22 to rotate, so that the sliding seat 17 moves along the slide rail 21. The infrared thermal imager 19 can perform infrared thermal imaging monitoring on the concrete wall structure and accurately measure the crack conditions on the concrete wall structure. The electronic scanning mirror 18 can accurately measure the crack position and area, thereby ensuring the accuracy of the test and evaluation of the crack resistance of the concrete structure.

[0028] When evaluating the crack resistance of self-compacting concrete, the self-compacting concrete is mixed and stirred and then poured into the inner side of the concrete knife-edge constraint tester 25. The concrete knife-edge constraint tester 25 adopts a steel mold. The four sides of the mold are welded with channel steel. The four sides of the mold are fixed to the bottom plate by bolts. The bottom plate adopts a steel plate with a thickness of not less than 5mm, and a polyethylene film isolation layer is laid on the surface of the bottom plate. There are seven stress induction generators in the mold, which are welded with 50mm×50mm, 40mm×40mm angle steel and 5mm×50mm steel plate respectively, and fixed to the bottom plate parallel to the short side of the mold. After the concrete is poured, it is vibrated and compacted. The time is measured from the time when water is added to the self-compacting concrete and stirred. After 24 hours, the length and width of the cracks in the self-compacting concrete in the concrete knife-edge constraint tester 25 are measured respectively by using a tape measure and a reading microscope, and then the crack area of ​​the self-compacting concrete is calculated to accurately evaluate the crack resistance of the self-compacting concrete.

[0029] A water tank 11 is installed on the side of the hardened glass 5 on the other side. A heating tube assembly 10 is provided on the bottom side of the water tank 11 , and a pump 12 is provided on one side of the lower part of the water tank 11 .

[0030] A control module 23 is provided on the outer side of the water tank 11 , a water outlet of the pump 12 is connected to the main water pipe 13 , and an exhaust valve 2 is provided at the center of the upper side of the ultraviolet partition 1 .

[0031] A wind speed sensor 24 is provided on the inner side of the support frame 6 near the blower fan 3 , and a temperature and humidity sensor 16 is installed on the main water pipe 13 of the vertical portion.

[0032] The temperature and humidity sensor 16 , the wind speed sensor 24 , the infrared thermal imager 19 , the heating tube assembly 10 and the electric heating wire 4 are all connected to the control module 23 .

[0033] A valve is provided between the water distribution pipe 15 and the atomizing nozzle 14, and the sealing plate 9 is a split structure.

[0034] Among them, sealing buckle plates 9 are provided on the other two side surfaces of the support frame 6, and a sealing gasket 27 is clamped between the sealing buckle plate 9 and the support frame 6, the bottom of the sealing buckle plate 9 is clamped in the limiting groove of the support frame 6, and elastic pins 26 are fixedly connected on both sides of the sealing buckle plate 9 on the support frame 6, and a clamping block 28 is provided on the sealing buckle plate 9 at the elastic pin 26, the elastic pin includes a support block 2601, a slider 2603 slidingly set in the inner hole of the support block 2601, a spring 2602 clamped between the slider 2603 and the inner hole of the support block 2601 and a spherical clamping head 2604 fixed on one side of the slider 2603 and passing through the support block 2601, and a clamping hole matching the spherical clamping head 2604 is opened on the clamping block 28.

[0035] By adopting the above-mentioned technical solution, after the sealing buckle plate 9 is inserted into the support frame 6, pressing the sealing buckle plate 9 hard can push the spherical clamping head 2604 in the elastic pin 26 to shrink under the action of the spring 2602, so that the spherical clamping head 2604 is inserted into the clamping hole of the clamping block 28, thereby realizing quick installation, and the sealing gasket can play a sealing role.

[0036] The main body of the device is made of ABS material. By using ABS material for the device material, the weight of the device is reduced, the labor consumption is reduced, and it is easy to disassemble and assemble, and the replacement of concrete samples is convenient.

[0037] The working principle of the concrete crack resistance evaluation device provided by the present invention is as follows: Figure 1-Figure 4 As shown, when the crack resistance test of the concrete wall structure is required, the sealing plate 9 is opened, the cylinder 7 lifts the support frame 6, so that the universal wheel 8 is supported on the ground, and then the support frame 6 and the hardened glass 5 can be pushed to move to the upper side of the concrete wall structure as a whole, so that the protective structure formed by the hardened glass 5, the ultraviolet partition 1 and the support frame 6 covers the concrete wall, the blower fan 3 can send air into the test space, the electric heating wire 4 heats the air, so that the device can perform hot air drying on the concrete wall structure to simulate the crack resistance of the concrete structure under high temperature environment, and the pump 12 can pump the water tank 1 1 is pressurized and pumped to the atomizing nozzle 14 through the main water pipe 13 and the water branch pipe 15. The atomizing nozzle 14 sprays water mist to simulate a high-humidity environment, thereby testing and evaluating the crack resistance of the concrete wall structure in a high-humidity environment. The servo motor 20 can drive the screw 22 to rotate, so that the sliding seat 17 moves along the slide rail 21. The infrared thermal imager 19 can perform infrared thermal imaging monitoring on the concrete wall structure and accurately measure the crack conditions on the concrete wall structure. The electronic scanning mirror 18 can accurately measure the crack position and area, thereby ensuring the accuracy of the test and evaluation of the crack resistance of the concrete structure.

[0038] When evaluating the crack resistance of self-compacting concrete, the self-compacting concrete is mixed and stirred and then poured into the inner side of the concrete knife-edge constraint tester 25. The concrete knife-edge constraint tester 25 adopts a steel mold. The four sides of the mold are welded with channel steel. The four sides of the mold are fixed to the bottom plate by bolts. The bottom plate adopts a steel plate with a thickness of not less than 5mm, and a polyethylene film isolation layer is laid on the surface of the bottom plate. There are seven stress induction generators in the mold, which are welded with 50mm×50mm, 40mm×40mm angle steel and 5mm×50mm steel plate respectively, and fixed to the bottom plate parallel to the short side of the mold. After the concrete is poured, it is vibrated and compacted. The time is measured from the time when water is added to the self-compacting concrete and stirred. After 24 hours, the length and width of the cracks in the self-compacting concrete in the concrete knife-edge constraint tester 25 are measured respectively by using a tape measure and a reading microscope, and then the crack area of ​​the self-compacting concrete is calculated to accurately evaluate the crack resistance of the self-compacting concrete.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A concrete crack resistance evaluation device, comprising a support frame (6), characterized in that: Hardened glass (5) is installed on the two side surfaces of the support frame (6), an ultraviolet partition (1) is installed on the upper side of the support frame (6), a blower fan (3) is provided on the hardened glass (5) on one side, an electric heating wire (4) is provided on the blower fan (3) close to the hardened glass (5), a cylinder (7) is installed on the outside of the four corners of the support frame (6), a universal wheel (8) is connected to the telescopic end of the cylinder (7), a water distribution pipe (15) is horizontally provided on the inner side of the hardened glass (5), an atomizing nozzle (14) is installed on the water distribution pipe (15), and the ultraviolet partition (1 ) is installed on the lower side, a slide rail (21) is provided in the slide rail (21), a sliding seat (17) is provided in the upper inner side of the sliding seat (17), a screw rod (22) is passed through the inner side of the upper part of the sliding seat (17), one end of the screw rod (22) is connected to a servo motor (20) through a right-angle reducer, an electronic scanning mirror (18) is installed on the lower side of the sliding seat (17), an infrared thermal imager (19) is provided on the upper side of the electronic scanning mirror (18), a concrete knife edge constraint tester (25) is provided on the bottom side of the internal space of the support frame (6), and a blowing fan (29) is provided on one side of the concrete knife edge constraint tester (25).

2. A concrete crack resistance evaluation device according to claim 1, characterized in that: A water tank (11) is installed on the side of the hardened glass (5) on the other side, a heating pipe assembly (10) is provided on the bottom side of the water tank (11), and a pump (12) is provided on a side of the lower part of the water tank (11).

3. The concrete crack resistance evaluation device according to claim 2, characterized in that: A control module (23) is provided on the outer side of the water tank (11), the water outlet end of the pump (12) is connected to the main water pipe (13), and an exhaust valve (2) is provided at the center of the upper side of the ultraviolet baffle (1).

4. A concrete crack resistance evaluation device according to claim 3, characterized in that: A wind speed sensor (24) is provided on the inner side of the support frame (6) near the blower fan (3), and a temperature and humidity sensor (16) is installed on the vertical portion of the main water pipe (13).

5. The concrete crack resistance evaluation device according to claim 4, characterized in that: The temperature and humidity sensor (16), the wind speed sensor (24), the infrared thermal imager (19), the heating tube assembly (10) and the electric heating wire (4) are all connected to the control module (23).

6. The concrete crack resistance evaluation device according to claim 1, characterized in that: A valve is provided between the water distribution pipe (15) and the atomizing nozzle (14), and the sealing buckle plate (9) is a split structure.

7. The concrete crack resistance evaluation device according to claim 1, characterized in that: Sealing buckle plates (9) are provided on the other two side surfaces of the support frame (6), and a sealing gasket (27) is clamped between the sealing buckle plate (9) and the support frame (6), the bottom of the sealing buckle plate (9) is clamped in the limiting groove of the support frame (6), and elastic pins (26) are fixedly connected to both sides of the sealing buckle plate (9) on the support frame (6), and a clamping block (28) is provided on the sealing buckle plate (9) at the elastic pin (26).

8. The concrete crack resistance evaluation device according to claim 1, characterized in that: The elastic pin comprises a support block (2601), a slider (2603) slidably arranged in the inner hole of the support block (2601), a spring (2602) clamped between the slider (2603) and the inner hole of the support block (2601), and a spherical clamping head (2604) fixed to one side of the slider (2603) and passing through the support block (2601); the clamping block (28) is provided with a clamping hole that cooperates with the spherical clamping head (2604).

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