Concrete performance detection device

Abstract

The utility model provides a concrete performance detection device. The concrete performance detection device comprises a shell, a detection box, a temperature control assembly and a pressurizing assembly, an avoiding hole is formed in the top wall of the shell, and a sliding groove is formed in the bottom wall in the shell; the detection box is arranged inside the shell, the detection box is used for placing a concrete test piece and is filled with a thawing and freezing solution submerging the concrete test piece, at least one side box wall of the detection box is a movable baffle plate, the movable baffle plate is in sliding connection with the sliding chute, and the movable baffle plate is used for horizontally moving to change the volume of the detection box when the thawing and freezing solution is iced or de-iced; the temperature control assembly is arranged in the detection box and is used for heating or cooling the thawing liquid so as to enable the thawing liquid to be iced or de-iced; the pressurizing assembly is arranged at the top of the shell, and the output end extends into the detection box and applies load to the concrete test piece. According to the utility model, the temperature control assembly arranged in the detection box is adopted, so that the freezing and thawing liquid in the detection box can be quickly frozen or de-iced, the time of a freezing and thawing cycle test is shortened, and the detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of concrete performance detection, and specifically relates to a concrete performance detection device. BACKGROUND

[0002] In engineering construction, concrete, as an important building material, needs to bear huge load, so in order to ensure the safety and reliability of the concrete structure, load test and performance evaluation must be carried out on the concrete during the design, construction and use. After the freeze-thaw cycle, the frost resistance and mechanical properties of the concrete will degrade, and the adhesion between the concrete and the steel bar will also be damaged, so it is of great engineering significance to detect the mechanical properties and the adhesion between the concrete and the steel bar after the freeze-thaw cycle.

[0003] In the prior art, when the concrete under the load and freeze-thaw coupling is detected, a jack is usually used to press to detect the load capacity of the concrete, the concrete test piece is placed in the concrete test piece box, and the concrete test piece is subjected to freeze-thaw cycle by using the concrete freeze-thaw box. However, in this detection method, water for immersing the concrete test piece needs to be added in the test piece box during the freeze-thaw cycle operation, and the heat transfer of the water is carried out by the freeze-thaw liquid outside the test piece box. However, this operation method relies on the heat conduction of the concrete test piece box, and the process of temperature reduction and increase of the concrete test piece box with large volume is relatively slow, which affects the detection efficiency. Moreover, the water in the test piece box will expand in volume after freezing, which will squeeze the concrete test piece, and the concrete test piece is easy to be damaged in the freeze-thaw cycle environment. UTILITY MODEL CONTENTS

[0004] The utility model embodiment provides a kind of concrete performance detection device, to solve the problem of low heat conduction efficiency of concrete test piece box and concrete test piece in prior art is easily squeezed and damaged by ice water.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows: a concrete performance detection device is provided, which comprises a shell, a detection box, a temperature control assembly and a pressurizing assembly. The top wall of the shell is provided with a clearance hole, and the bottom wall inside the shell is provided with a chute. The detection box is arranged inside the shell and is used to place concrete test pieces and fill freeze-thaw liquid that submerges the concrete test pieces. At least one side wall of the detection box is an movable baffle that is slidably connected to the chute. The movable baffle is used to move horizontally to change the volume of the detection box when the freeze-thaw liquid freezes or melts. The temperature control assembly is arranged in the detection box and is used to heat or cool the freeze-thaw liquid to make the freeze-thaw liquid freeze or melt. The pressurizing assembly is arranged at the top of the shell, and the output end extends into the detection box and applies load to the concrete test pieces.

[0006] In a possible implementation, the two opposite box walls of the detection box are both movable baffles; the lower end of the movable baffles is provided with a sliding block, and the sliding block is in sliding fit with a sliding groove.

[0007] In a possible implementation, the sliding block is provided with a first elastic member, and the first elastic member is connected with the inner wall of the shell.

[0008] In a possible implementation, the upper end of the movable baffle is provided with a sliding member, and the movable baffle is in sliding connection with the top wall of the detection box through the sliding member.

[0009] In a possible implementation, the sliding member is provided with a second elastic member, and the second elastic member is connected with the inner wall of the shell.

[0010] In a possible implementation, the temperature control assembly comprises a temperature control pipe and a temperature controller; the temperature control pipe spirally surrounds the periphery of the concrete test piece; the temperature control pipe is used for passing through a liquid medium; the temperature controller is electrically connected with the temperature control pipe; and the temperature controller is used for controlling the temperature of the liquid medium.

[0011] In a possible implementation, the temperature control assembly further comprises a temperature sensor; the temperature sensor is arranged on the movable baffle and has a sensing end extending into the inside of the detection box.

[0012] In a possible implementation, the pressurizing assembly comprises a support and a telescopic driving member; the support is arranged above the shell; the telescopic driving member is arranged on the support; the output end of the telescopic driving member is provided with a pressing member; and the pressing member is used for pressing the concrete test piece.

[0013] In a possible implementation, the output end of the telescopic driving member is provided with a pressure sensor.

[0014] In a possible implementation, the concrete performance detection device further comprises a data collector; the data collector is electrically connected with the pressurizing assembly and is used for collecting load data.

[0015] The concrete performance detection device has the following advantages: compared with the prior art, the detection box with the pressurizing assembly can provide load for the concrete test piece in the detection box; the temperature control assembly arranged in the detection box can freeze and thaw the freeze-thaw liquid in the detection box; in the simulation of freeze-thaw cycles, the freeze-thaw liquid close to the concrete test piece can be frozen or thawed first, the temperature can be changed when the freeze-thaw liquid around the concrete test piece is frozen or thawed, the freeze-thaw cycle operation is performed, the time of the freeze-thaw cycle test is shortened, the detection efficiency of the load freeze-thaw coupling concrete test piece is improved; and the movable baffle can move in the horizontal direction to avoid the increase in the volume of the freeze-thaw liquid in the detection box when the freeze-thaw liquid is frozen, so that the detection accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A front view structural schematic diagram of the concrete detection device is provided for the embodiments of the present application.

[0017] Figure 2 A front view structural schematic diagram of the shell is provided for the embodiments of the present application.

[0018] Figure 3 A front view structural schematic diagram of the detection box is provided for the embodiments of the present application.

[0019] Figure 4 A front view structural schematic diagram of the temperature control assembly is provided for the embodiments of the present application.

[0020] Figure 5 A front view structural schematic diagram of the pressurizing assembly is provided for the embodiments of the present application.

[0021] In the figure: 10, shell; 11, avoiding hole; 12, sliding groove; 20, detection box; 21, movable baffle; 22, through hole; 23, sliding block; 24, first elastic member; 25, sliding member; 26, second sliding member; 27, connecting member; 28, sliding rod; 30, temperature control assembly; 31, temperature control pipe; 32, temperature controller; 33, temperature sensor; 40, pressurizing assembly; 41, support; 42, telescopic driving member; 43, pressing member; 431, limiting ring; 44, pressure sensor; 50, data collector; 60, concrete test piece. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0023] It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "up", "down", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0024] Please see Figure 1 and Figure 2 The concrete performance detection device is described as follows. The concrete performance detection device comprises a shell 10, a detection box 20, a temperature control assembly 30 and a pressurizing assembly 40. The top wall of the shell 10 is provided with an avoiding hole 11, and the bottom wall inside the shell 10 is provided with a sliding groove 12. The detection box 20 is arranged inside the shell 10, and is used for placing a concrete test piece 60 and filling a freeze-thaw liquid to submerge the concrete test piece 60. At least one side wall of the detection box 20 is an active baffle 21, which is slidably connected with the sliding groove 12. The active baffle 21 is used for moving horizontally to change the volume of the detection box 20 when the freeze-thaw liquid is frozen or thawed. The temperature control assembly 30 is arranged in the detection box 20, and is used for heating or cooling the freeze-thaw liquid to make the freeze-thaw liquid frozen or thawed. The pressurizing assembly 40 is arranged on the top of the shell 10, and the output end thereof extends into the detection box 20 and applies a load to the concrete test piece 60.

[0025] It should be noted that the freeze-thaw liquid in the detection box 20 can be water, and the freeze-thaw environment of the concrete test piece 60 is simulated by freezing and thawing of the freeze-thaw liquid. When the active baffle 21 moves horizontally, the active baffle 21 always abuts against the bottom wall of the detection box 20 to avoid leakage of the freeze-thaw liquid in the detection box 20. A retractable sealing strip can also be arranged between the active baffle 21 and the bottom wall of the detection box 20 to prevent the freeze-thaw liquid in the detection box 20 from flowing out of the detection box 20 from the bottom end of the active baffle 21 when the active baffle 21 moves horizontally. The temperature control assembly 30 is arranged inside the detection box 20 and can change its temperature, so that the freeze-thaw liquid close to the concrete test piece 60 can freeze or thaw earlier than the freeze-thaw liquid close to the side wall of the detection box 20. Compared with the prior art of transferring heat from the outer wall of the detection box 20 to the center of the detection box 20, the temperature around the concrete test piece 60 can be changed faster, and the detection efficiency is improved. Before the concrete test piece 60 is placed in the detection box 20, the test piece should be soaked in saturated lime water at 20±2℃ for four days before the specified curing age. After soaking for four days, the concrete test piece 60 is taken out, and the concrete test piece 60 is placed in the detection box. The top surface of the concrete test piece 60 is 1-3mm lower than the level of the freeze-thaw liquid inside the detection box 20.

[0026] The concrete performance detection device has the advantages that compared with the prior art, the detection box 20 provided with the pressurizing assembly 40 can provide load for the concrete test piece 60 in the detection box 20, the freezing-thawing liquid in the detection box 20 is frozen and thawed by the temperature control assembly 30 arranged in the detection box 20, the freezing-thawing liquid close to the concrete test piece 60 can be frozen or thawed first when simulating the freeze-thaw cycle, the freeze-thaw cycle operation can be performed by changing the temperature when the freezing-thawing liquid around the concrete test piece 60 is frozen or thawed, the freeze-thaw cycle test time is shortened, the detection efficiency of the load freeze-thaw coupling concrete test piece 60 is improved, and the movable baffle 21 can move in the horizontal direction to avoid the increase in the volume of the freezing-thawing liquid in the detection box 20 when the freezing-thawing liquid is frozen, so that the detection accuracy is improved.

[0027] In a possible implementation, referring to Figure 3 , the two opposite box walls of the detection box 20 are movable baffles 21; the lower end of the movable baffle 21 is provided with a sliding block 23, and the sliding block 23 is in sliding fit with the sliding groove 12.

[0028] It should be noted that the movable baffle 21 as the side wall of the detection box 20 can move along the bottom wall of the detection box 20 after the freezing-thawing liquid in the detection box 20 is frozen, and drive the sliding block 23 to move horizontally in the sliding groove 12, so that the freezing-thawing liquid in the detection box 20 is prevented from being extruded to damage the concrete test piece 60 when the volume of the freezing-thawing liquid is increased; the two movable baffles 21 are arranged as a set of opposite faces of the detection box 20, and the detection box 20 further has a set of fixedly arranged opposite faces, which together with the two movable baffles 21 form the four side walls of the detection box 20; the sliding block 23 slides in the sliding groove 12, the contact surface between the sliding block 23 and the sliding groove 12 is smooth, so that the sliding friction between the sliding block 23 and the sliding groove 12 is reduced; the movable baffle 21 and the sliding block 23 can be connected by the connecting piece 27, the connecting piece 27 can abut against the bottom wall of the detection box 20, and is used for limiting the movable baffle 21 from moving to the center of the detection box 20, so that the freezing-thawing liquid in the detection box 20 is prevented from being extruded and discharged.

[0029] In a possible implementation, referring to Figure 3 , the sliding block 23 is provided with a first elastic member 24, and the first elastic member 24 is connected with the inner wall of the shell 10.

[0030] It should be noted that the first elastic member 24 can be arranged on the sliding block 23 or the connecting member 27, and can provide elastic force for the sliding block 23 or the connecting member 27, detect the volume increase of the thawing liquid in the detection box 20 after freezing, and push the movable assembly to move to the outside of the detection box 20. The first elastic member 24 provides the connecting member 27 with elastic force for abutting against the bottom wall of the detection box 20, so that the movable baffle 21 is tightly attached to the bottom wall of the detection box 20, the leakage of the thawing liquid in the detection box 20 is avoided, the freeze-thaw environment of the concrete test piece 60 is more stable, and the detection accuracy is ensured; and the first elastic member 24 can push the movable baffle 21 to return to the initial position when the thawing liquid in the detection box 20 is thawed, so that a gap is avoided between the movable baffle 21 and the bottom wall of the detection box 20, and the automatic detection of the detection device is realized while the leakage of the thawing liquid is avoided.

[0031] In a possible implementation, referring to Figure 3 , the upper end of the movable baffle 21 is provided with a sliding member 25, and the movable baffle 21 is slidably connected to the top wall of the detection box 20 through the sliding member 25.

[0032] The top wall of the detection box 20 can be provided with a sliding rod 28, the sliding member 25 is slidably connected to the sliding rod 28 and abuts against the top wall of the detection box 20, and the sliding rod 28 can prevent the sliding member 25 from being separated from the top wall of the detection box 20, so that the upper end of the movable baffle 21 is prevented from being separated from the top wall of the detection box 20 during horizontal movement of the movable baffle 21, and the overall structural strength of the detection box 20 is increased; the sliding member 25 and the top wall of the detection box 20 are both smooth surfaces, so that the sliding friction between the two is reduced, and the position of the sliding member 25 can be above the horizontal plane of the freeze-thaw liquid in the detection box 20, so that the leakage of the freeze-thaw liquid is avoided during sliding on the top wall of the detection box 20.

[0033] In a possible implementation, referring to Figure 3 , the sliding member 25 is provided with a second elastic member, and the second elastic member is connected to the inner wall of the shell 10.

[0034] It should be noted that the second elastic member connects the sliding member 25 to the inner wall of the shell 10, and cooperates with the first elastic member 24 to connect both ends of the movable baffle 21 to the inner wall of the shell 10, so that the movable baffle 21 is prevented from tilting during detection; and the second elastic member and the first elastic member 24 jointly push the movable baffle 21 to return to the initial position when the thawing liquid in the detection box 20 is thawed, so that the automatic detection of the detection device is realized.

[0035] In a possible implementation, referring to Figure 4The temperature control assembly 30 comprises a temperature control pipe 31 and a temperature controller 32. The temperature control pipe 31 spirally surrounds the periphery of the concrete test piece 60, and is used to pass liquid medium. The temperature controller 32 is electrically connected with the temperature control pipe 31, and is used to control the temperature of the liquid medium.

[0036] It should be noted that the temperature control pipe surrounds the periphery of the concrete test piece 60, so that the freeze-thaw liquid in the detection box 20 close to the concrete test piece 60 can be frozen or thawed first, which can reduce the energy consumption of the temperature control assembly 30, reduce the freeze-thaw cycle time, and improve the detection efficiency. The liquid medium in the temperature control pipe can change the temperature of the pipe wall of the temperature control pipe, and exchange heat with the freeze-thaw liquid in the detection box 20, so that the freeze-thaw liquid in the detection box 20 can be frozen or thawed. The liquid medium can be ethylene glycol, and the freezing point of ethylene glycol is-12°, and the minimum freezing point of its aqueous solution can reach-60°, which can avoid blocking the temperature control pipe when the liquid medium is passed into the temperature control pipe and reaches below zero, and can make the water in the detection box 20 freeze. The temperature controller 32 can be a refrigeration and heating integrated machine, which has a heating part and a cooling part. The temperature controller 32 uses the cooling part to cool the liquid medium in the temperature control pipe, and can heat the liquid medium in the temperature control pipe through the heating part, so that the freeze-thaw liquid in the detection box 20 can be frozen and thawed to simulate freeze-thaw cycle, so that the concrete test piece 60 can be tested in a freeze-thaw environment, which is beneficial to improve the detection accuracy.

[0037] In a possible implementation, please refer to Figure 4 The temperature control assembly 30 further comprises a temperature sensor 33, which is arranged on the movable baffle 21 and has a sensing end extending into the detection box 20.

[0038] It should be noted that the temperature sensor 33 is arranged on the movable baffle 21 and has a sensing end extending into the detection box 20, so that the actual temperature of the freeze-thaw liquid in the detection box 20 can be obtained from the reading of the temperature sensor 33, and the temperature controller 32 can be adjusted in real time by observing the reading, so as to avoid damage to the concrete test piece 60 caused by the freeze-thaw liquid being outside the normal temperature range.

[0039] In a possible implementation, please refer to Figure 5 The pressing assembly 40 comprises a support 41 and a telescopic driving member 42. The support 41 is arranged above the shell 10. The telescopic driving member 42 is arranged on the support 41, and the output end of the telescopic driving member 42 is provided with a pressing piece 43 for pressing the concrete test piece 60.

[0040] It should be noted that the support 41 can be a steel frame welded on the shell 10, capable of providing effective support for the telescopic drive 42, providing a downward supporting force for the telescopic drive 42 when the pressing member 43 is pressed downward, so that the pressing member 43 can provide an effective load to the concrete test piece 60; the telescopic drive 42 can adjust the power output to the pressing member 43 to change the load applied by the pressing member 43 to the concrete test piece 60, which can adapt to the decrease of the load resistance of the concrete test piece 60 due to the degradation of the mechanical properties under the action of freeze-thaw cycle, and is beneficial to improve the detection accuracy; the limiting ring 431 can be arranged on the pressing member 43, and after the pressing member 43 enters the through hole 22 on the top of the detection box 20, the limiting ring 431 abuts against the upper surface of the detection box 20, which can limit the further pressing of the pressing member 43 to the concrete test piece 60, avoid the damage of the concrete test piece 60 caused by the excessive load provided by the pressing member 43, and affect the detection of the concrete test piece 60.

[0041] In a possible implementation, please refer to Figure 5 The output end of the telescopic drive 42 is provided with a pressure sensor 44.

[0042] It should be noted that the pressure sensor 44 is arranged between the telescopic drive 42 and the pressing member 43, which can display the pressure output by the telescopic drive 42 in real time, and through the observation of the indication on the pressure sensor 44, the telescopic drive 42 can be adjusted in time through the pressure controller.

[0043] In a possible implementation, please refer to Figure 1 The concrete performance detection device further comprises a data collector 50, which is electrically connected with the pressurizing assembly 40 and is used for collecting load data.

[0044] It should be noted that the data collector 50 is connected with the pressurizing assembly 40, which can collect the real-time load data of the concrete test piece 60 under the action of load freeze-thaw coupling, and can obtain the mechanical properties of the concrete test piece 60 and the bonding properties of the concrete and the steel bar according to the load data, which has important engineering significance.

[0045] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Concrete performance testing device, characterized in that, include: A housing, wherein the top wall of the housing is provided with an avoidance hole, and the bottom wall inside the housing is provided with a sliding groove; a detection box disposed inside the shell, the detection box being used to place a concrete specimen and be filled with thawing liquid to submerge the concrete specimen, at least one side wall of the detection box being a movable baffle, the movable baffle being slidably connected to the chute, the movable baffle being used to move horizontally to change the volume of the detection box when the thawing liquid freezes or melts; a temperature control component, disposed in the detection box, for heating or cooling the thawing liquid to freeze or melt the thawing liquid; The pressurizing component is arranged on the top of the shell, and the output end thereof extends into the detection box and applies a load to the concrete specimen.

2. The concrete performance testing device according to claim 1, characterized in that: The two opposite box walls of the detection box are both the movable baffles; a slider is provided at the lower end of the movable baffle, and the slider is slidably matched with the sliding groove.

3. The concrete performance testing device according to claim 2, characterized in that: The slider is provided with a first elastic member, and the first elastic member is connected to the inner wall of the shell.

4. The concrete performance testing device according to claim 2, characterized in that: A sliding piece is provided at the upper end of the movable baffle, and the movable baffle is slidably connected to the top wall of the detection box through the sliding piece.

5. The concrete performance testing device according to claim 4, characterized in that: The sliding member is provided with a second elastic member, and the second elastic member is connected to the inner wall of the shell.

6. The concrete performance testing device according to claim 1, characterized in that: The temperature control assembly includes a temperature control tube and a temperature controller. The temperature control tube is spirally wrapped around the periphery of the concrete specimen. The temperature control tube is used to pass a liquid medium. The temperature controller is electrically connected to the temperature control tube and is used to control the temperature of the liquid medium.

7. The concrete performance testing device according to claim 1, characterized in that: The temperature control component further comprises a temperature sensor, which is arranged on the movable baffle and has a sensing end extending into the interior of the detection box.

8. The concrete performance testing device according to claim 1, characterized in that: The pressurizing assembly comprises: a bracket, arranged above the shell; A telescopic driving member is provided on the bracket. An output end of the telescopic driving member is provided with a pressing member, and the pressing member is used to press the concrete specimen.

9. The concrete performance testing device according to claim 8, characterized in that: A pressure sensor is provided at the output end of the telescopic driving member.

10. The concrete performance testing device according to claim 1, characterized in that: The concrete performance detection device further includes a data collector, which is electrically connected to the pressurizing component and is used to collect load data.

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