Durability detection equipment for bridge concrete structure

Abstract

The utility model relates to durability detection equipment for a bridge concrete structure, which comprises a freeze-thaw test box, the freezing and thawing test box is internally provided with a workbench, a lifting driving mechanism arranged on the workbench, a pressure detection module and a plurality of elastic pieces which are arranged at the moving end of the lifting driving mechanism, and a pressing plate which is arranged at the bottom ends of the plurality of elastic pieces and abuts against the detection end of the pressure detection module; the pressure detection module is arranged at the moving end of the lifting driving mechanism, the displacement detection module is arranged between the moving end of the lifting driving mechanism and the pressing plate, the signal input end of the control module is electrically connected to the signal output end of the pressure detection module and the signal output end of the displacement detection module, and the signal output end of the control module is electrically connected to the signal input end of the lifting driving mechanism. The device not only can meet the detection requirements of different pressure loads, but also has the advantages of simplicity and convenience in operation, accuracy in detection and the like, and has important practical significance in improving the durability detection level of a bridge concrete structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concrete performance detection especially to durability detection equipment of bridge concrete structure. BACKGROUND

[0002] At present, the bridge durability problem has caused people's high attention, and many highway research institutions and relevant professional colleges and universities have begun to conduct in-depth research on the durability problem of concrete bridge structure and have achieved some results. The durability research of concrete is of great significance. On the one hand, the bridge with durability disease can be detected, evaluated and residual life predicted by scientific means, and reasonable and effective treatment measures are put forward according to the specific situation to improve the durability of the bridge, ensure the safety of the structure and prolong the service life of the structure. On the other hand, the manual or guide for the durability design of concrete structure can be formulated by scientific method, so as to guide the design, construction and management and maintenance of newly-built bridges. In addition, through the continuous summary of various factors influencing the durability of bridge structure, the overall level of bridge design can be improved to a certain extent, the construction quality of bridge and the daily management and maintenance level can be improved. The durability research of concrete bridge can bring great economic benefits and good social influence, which will be beneficial to the development of transportation industry.

[0003] The durability of bridge concrete has an important influence on its long-term service life, and the damage and deterioration mechanism of bridge concrete under complex environment still needs further research. Considering that the old bridge is in the water level change area for many years, the dry-wet cycle test is carried out for it, and the influence of different dry-wet cycle times on the mechanical properties is analyzed; the durability of concrete under the action of water flow abrasion is tested, the strength loss, elastic modulus, porosity and other parameters are measured, the morphology of the abrasion surface is analyzed based on microscopic detection; the impermeability and mechanical properties of concrete under composite salt solution immersion are studied, and the deterioration mechanism of salt ion erosion on the performance of concrete is analyzed; the strength, dynamic elastic modulus loss rate and microstructure of concrete samples with different water contents, dry and saturated states after freeze-thaw cycle are studied, which provides a basis for the establishment of durability evaluation and life prediction model.

[0004] The frost resistance of concrete refers to the ability of the material to withstand repeated freeze-thaw cycles without damage and the strength does not decrease significantly. Generally, the frost resistance of concrete is detected by using a concrete freeze-thaw test box, which evaluates the frost resistance of concrete samples by simulating the fluctuation of environmental temperature. However, the concrete freeze-thaw test box can only replicate the influence of temperature change, but cannot simulate the heavy pressure that the concrete bears during actual construction process. Therefore, the existing test box cannot apply different pressure loads according to specific needs when testing and detecting concrete, which limits the comprehensive evaluation of the performance of concrete, and technical improvement is urgently needed. SUMMARY

[0005] The utility model solves the problem of the prior art and provides a durability detection equipment for bridge concrete structure, which achieves the purpose of applying different pressure loads according to specific requirements.

[0006] The utility model discloses the above-mentioned utility model purpose is realized through the following technical schemes:

[0007] A durability detection equipment for bridge concrete structure, including freeze-thaw test box, freeze-thaw test box is provided with work table, set up in the lifting drive mechanism of work table, the pressure detection module and a plurality of elastic pieces of mobile end of lifting drive mechanism are provided, the pressing plate of the bottom end of a plurality of elastic pieces is provided with and with the detection end of pressure detection module is in contact, the displacement detection module of mobile end and the pressing plate between lifting drive mechanism is provided, and control module, the signal input end of control module is electrically connected to the signal output end of pressure detection module and displacement detection module, signal output end is electrically connected to the signal input end of lifting drive mechanism.

[0008] Through adopting above-mentioned technical scheme, in the freeze-thaw cycle test of same pressure load, in addition to the cycle freeze-thaw operation of freeze-thaw test box itself, lifting drive mechanism and pressing plate in freeze-thaw test box work cooperatively, and the load is applied to the test piece on work table, simultaneously, the combination use of pressure detection module and elastic piece makes that equipment can monitor and record the pressure load change condition of concrete test piece in real time, and combines the displacement detection value of displacement detection module, and then the pressure and displacement information are fed back to control module, and the displacement of lifting drive mechanism is adjusted, so that the pressure load that concrete test piece receives tends to be consistent, thereby evaluating its durability;In the freeze-thaw cycle test of different pressure load, control module as the core of equipment is responsible for receiving the signal of pressure detection module and displacement detection module, and according to the program of prearranging, the movement of lifting drive mechanism is controlled, to realize the purpose of applying different pressure loads to test piece;The durability detection equipment for bridge concrete structure provided by the utility model not only can satisfy the detection demand of different pressure loads, but also has the advantages of simple operation, accurate detection, and the like, and has important practical significance for improving the durability detection level of bridge concrete structure.

[0009] The utility model further sets up: lifting drive mechanism includes a plurality of slide rods set up on work table, first supporting plate set up on a plurality of slide rods, hydraulic cylinder set up on first supporting plate, second supporting plate is hinged to the piston rod of hydraulic cylinder and is set up on a plurality of slide rods with gap, pressure detection module, a plurality of elastic pieces and displacement detection module are set up on second supporting plate.

[0010] By adopting the technical scheme, since the surface flatness of the concrete test piece is often inconsistent, after the second supporting plate is driven to descend by the hydraulic cylinder and abuts against the surface of the test piece, the hinged mode of the piston rod of the hydraulic cylinder, the sliding gap between the second supporting plate and the slide rod and the pre-tightening action of the elastic member facilitate the second supporting plate to tilt along the surface of the test piece, thereby ensuring that the surface of the test piece is uniformly pressed in the subsequent test process and enabling the second supporting plate and the pressing plate to be relatively parallel, without affecting the detection feedback result.

[0011] The utility model further sets up: pressure detection module includes setting on the second supporting plate pressure sensor and the first linear bearing of setting in pressure sensor, the detection end of pressure sensor abuts on pressure plate, the removal end of first linear bearing sets up on pressure plate.

[0012] By adopting the technical scheme, since the first linear bearing is arranged, the detection end of the pressure sensor and the pressing plate are kept relatively parallel, thereby ensuring the accuracy of the detection data.

[0013] The utility model further sets up: the elastic member includes setting on the second supporting plate pressure spring and the second linear bearing of setting in pressure spring, the bottom of pressure spring sets up on pressure plate, the removal end of second linear bearing sets up on pressure plate.

[0014] By adopting the technical scheme, since the second linear bearing is arranged, the pressure springs and the pressing plate are kept relatively perpendicular, thereby ensuring the accuracy of the detection data.

[0015] The utility model further sets up: pressure spring sets up rectangular spring.

[0016] By adopting the technical scheme, the rectangular spring has good elasticity and stability, can ensure that consistent reaction force is provided under different pressure conditions, thereby improving the repeatability and reliability of the detection equipment.

[0017] The utility model further sets up: pressure detection module is close to the center arrangement of pressure plate, a plurality of elastic members are arranged around the circumference of pressure detection module.

[0018] By adopting the technical scheme, the pre-tightening action of the plurality of elastic members can effectively absorb the slight deviation caused by the unevenness of the surface of the test piece, so that the pressing plate can better fit the surface of the test piece, thereby further improving the detection accuracy.

[0019] The utility model further sets up: displacement detection module sets up magnetic grating displacement sensor, and the magnetic grating of magnetic grating displacement sensor sets up on the second supporting plate, and the reading head sets up on pressure plate.

[0020] By adopting the technical scheme, the magnetic grid displacement sensor can provide high-precision displacement measurement, and ensures accurate recording of displacement data in the detection process; the non-contact measurement mode between the magnetic grid and the read head effectively avoids wear and error that may be caused by the traditional contact measurement, thereby improving the stability and service life of the detection equipment.

[0021] The utility model further sets up: control module set up main control machine.

[0022] By adopting the technical scheme, the existing main control machine can effectively integrate and manage the running state of the entire detection equipment, including but not limited to data acquisition, processing and output. The main control machine, through the connection with the pressure detection module and the displacement detection module, monitors the pressure and displacement changes in the detection process in real time, ensures the accuracy and reliability of the detection data; at present, the main control machine also has powerful data processing capability, can quickly analyze and process the collected data, thereby providing instant detection results for the user, and after the detection is completed, the main control machine can also store the detection data in the internal database, facilitating subsequent data query and historical data comparison and analysis.

[0023] To sum up, the utility model has the beneficial technical effect that: not only can satisfy the detection demand of different pressure load, moreover has simple operation, detection accurate and so on advantage, has important practical significance to improve the durability detection level of bridge concrete structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of the detection equipment of the utility model.

[0025] Figure 2 It is the connection relation schematic diagram between the second supporting plate, the pressure detection module, the elastic member and the displacement detection module of the utility model.

[0026] In the drawing, 1, freeze-thaw test box;2, workbench;3, lifting driving mechanism;31, slide rod;32, first supporting plate;33, hydraulic cylinder;34, second supporting plate;4, pressure detection module;41, pressure sensor;42, first linear bearing;5, elastic member;51, compression spring;52, second linear bearing;6, pressing plate;7, displacement detection module;8, control module. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects realized by the utility model more clear and easy to understand, the utility model is further described below in combination with the drawings and specific embodiments.

[0028] Referring to Figure 1The utility model discloses a kind of durability detection equipment of bridge concrete structure, including freeze-thaw test box 1, workbench 2 being arranged in freeze-thaw test box 1, lifting drive mechanism 3 being arranged on workbench 2, pressure detection module 4 and multiple elastic members 5 being arranged in the moving end of lifting drive mechanism 3, pressure plate 6 being arranged in the bottom end of multiple elastic members 5 and being in contact with the detection end of pressure detection module 4, displacement detection module 7 being arranged between the moving end of lifting drive mechanism 3 and pressure plate 6, and control module 8.Wherein, the signal input end of control module 8 is electrically connected to the signal output end of pressure detection module 4 and displacement detection module 7, signal output end is electrically connected to the signal input end of lifting drive mechanism 3.

[0029] Lifting drive mechanism 3 includes multiple slide bars 31 being arranged on workbench 2, first supporting plate 32 being arranged on multiple slide bars 31, hydraulic cylinder 33 being arranged on first supporting plate 32, and second supporting plate 34 being hinged on the piston rod of hydraulic cylinder 33 and being gap-set on multiple slide bars 31. In addition, pressure detection module 4 is arranged close to the center of pressure plate 6, and multiple elastic members 5 are arranged equidistantly around the circumference of pressure detection module 4. Figure 2 , pressure detection module 4 includes pressure sensor 41 being arranged on second supporting plate 34 and first linear bearing 42 being set on pressure sensor 41, and the detection end of pressure sensor 41 is in contact with pressure plate 6, and the moving end of first linear bearing 42 is arranged on pressure plate 6. Elastic member 5 includes compression spring 51 being arranged on second supporting plate 34 and second linear bearing 52 being set on compression spring 51, and compression spring 51 is arranged as rectangular spring, and the bottom end is arranged on pressure plate 6, and the moving end of second linear bearing 52 is arranged on pressure plate 6. Displacement detection module 7 is arranged as magnetic grating displacement sensor, and the magnetic grating of magnetic grating displacement sensor is arranged on second supporting plate 34, and the reading head is arranged on pressure plate 6. Control module 8 is arranged as main control machine.

[0030] Since the surface flatness of concrete test piece is often inconsistent, after second supporting plate 34 is driven to descend by hydraulic cylinder 33 and is in contact with the surface of test piece, the hinged mode of the piston rod of hydraulic cylinder 33, the sliding gap between second supporting plate 34 and slide bar 31 and the pre-tightening action of elastic member 5, second supporting plate 34 is facilitated to tilt along the surface of test piece, so that the surface of test piece is uniformly pressed in subsequent test process, and second supporting plate 34 and pressure plate 6 are relatively parallel, which does not affect the detection feedback result. At the same time, the pre-tightening action of multiple elastic members 5 can effectively absorb the slight deviation caused by the unevenness of test piece surface, so that pressure plate 6 can better adhere to the surface of test piece, and the accuracy of detection is further improved.

[0031] In the freeze-thaw cycle test of the same pressure load, in addition to the cycle freeze-thaw operation of the freeze-thaw test box 1 itself, the lifting drive mechanism 3 and the pressure plate 6 in the freeze-thaw test box 1 work together to apply load to the test piece on the workbench 2, at the same time, the combination use of the pressure detection module 4 and the elastic element 5 enables the equipment to monitor and record the pressure load change of the concrete test piece in real time, and combines the displacement detection value of the displacement detection module 7, and then feeds back the pressure and displacement information to the control module 8, adjusts the displacement of the lifting drive mechanism, so that the pressure load of the concrete test piece tends to be consistent, so as to evaluate its durability; while in the freeze-thaw cycle test of different pressure loads, the control module 8 as the core of the equipment is responsible for receiving the signals of the pressure detection module 4 and the displacement detection module 7, and controlling the movement of the lifting drive mechanism 3 according to the preset program, so as to realize the purpose of applying different pressure loads to the test piece; The bridge concrete structure durability detection equipment provided by the utility model not only can meet the detection needs of different pressure loads, but also has the advantages of simple operation, accurate detection and the like, and has important practical significance for improving the durability detection level of the bridge concrete structure.

[0032] Finally, it is pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and they should be covered in the scope of the claims of the utility model.

Claims

1. A durability testing apparatus for a bridge concrete structure, comprising a freeze-thaw test chamber (1), characterized by: The freeze-thaw test box (1) is provided with a workbench (2), a lifting driving mechanism (3) arranged on the workbench (2), a pressure detection module (4) and a plurality of elastic members (5) arranged on the moving end of the lifting driving mechanism (3), a pressing plate (6) arranged at the bottom end of the plurality of elastic members (5) and abutting against the detection end of the pressure detection module (4), a displacement detection module (7) arranged between the moving end of the lifting driving mechanism (3) and the pressing plate (6), and a control module (8), wherein the signal input end of the control module (8) is electrically connected to the signal output ends of the pressure detection module (4) and the displacement detection module (7), and the signal output end is electrically connected to the signal input end of the lifting driving mechanism (3).

2. The durability inspection apparatus for a bridge concrete structure according to claim 1, characterized by: The lifting driving mechanism (3) comprises a plurality of slide rods (31) arranged on the workbench (2), a first supporting plate (32) arranged on the plurality of slide rods (31), a hydraulic cylinder (33) arranged on the first supporting plate (32), and a second supporting plate (34) hinged to the piston rod of the hydraulic cylinder (33) and gap-set on the plurality of slide rods (31), wherein the pressure detection module (4), the plurality of elastic members (5), and the displacement detection module (7) are arranged on the second supporting plate (34).

3. The durability inspection apparatus for a bridge concrete structure according to claim 2, characterized by: The pressure detection module (4) comprises a pressure sensor (41) arranged on the second supporting plate (34) and a first linear bearing (42) gap-set on the pressure sensor (41), wherein the detection end of the pressure sensor (41) abuts against the pressing plate (6), and the moving end of the first linear bearing (42) is arranged on the pressing plate (6).

4. The durability inspection apparatus for a bridge concrete structure according to claim 2, characterized by: The elastic member (5) comprises a compression spring (51) arranged on the second supporting plate (34) and a second linear bearing (52) gap-set on the compression spring (51), wherein the bottom end of the compression spring (51) is arranged on the pressing plate (6), and the moving end of the second linear bearing (52) is arranged on the pressing plate (6).

5. The durability inspection apparatus for a bridge concrete structure according to claim 4, characterized by: The compression spring (51) is arranged as a rectangular spring.

6. The durability inspection apparatus for a bridge concrete structure according to Claim 1, characterized by: The pressure detection module (4) is arranged close to the center of the pressing plate (6), and the plurality of elastic members (5) are arranged equidistantly around the circumference of the pressure detection module (4).

7. The durability inspection apparatus for a bridge concrete structure according to Claim 2, characterized by: The displacement detection module (7) is arranged as a magnetic grid displacement sensor, wherein the magnetic grid of the magnetic grid displacement sensor is arranged on the second supporting plate (34), and the reading head is arranged on the pressing plate (6).

8. The durability inspection apparatus for a bridge concrete structure according to Claim 1, characterized by: The control module (8) is arranged as a master control machine.

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