A detection device and a testing method for testing the deformation of concrete in low temperature environment

Abstract

The present invention discloses a detection device and a testing method for testing the deformation amount of concrete in a low-temperature environment, and relates to the technical field of concrete quality testing; in order to solve the problem of poor test quality; the detection device includes a refrigeration box arranged on the top surface of a bracket, and the interior of the refrigeration box is composed of a refrigeration chamber and a constant temperature chamber from top to bottom; the top outer wall of the refrigeration box is provided with a cover, and the four corners of the bottom of the cover are fixedly connected with guide columns, the guide columns are slidably connected to the inner wall of the refrigeration box, and the bottom ends of the guide columns are connected to the four corners of the top of the partition plate through bolts. The testing method of the detection device includes the following steps: the concrete specimen to be tested is transported to the top of the refrigeration box through the material conveying part one and the material conveying part two, and the cover is raised under the linkage of the material conveying part two. The present invention ensures the test accuracy of the concrete specimen, and avoids the tedious work of repeatedly taking and placing the concrete specimen, thereby improving the test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of concrete quality testing, and in particular to a detection device for testing the deformation amount of concrete in a low-temperature environment and a testing method thereof. Background Art

[0002] As one of the most important clean energy sources, liquefied natural gas (LNG) has begun to be widely used in countries around the world. Since the liquefaction temperature of LNG is -165°C, its storage conditions are very harsh. At present, the terminal tower for storing LNG is mainly based on the coordinated structure of the internal steel sealing layer and the external reinforced concrete protective layer. Therefore, in order to ensure that the concrete used can meet the quality requirements, it is necessary to study the temperature deformation of the concrete used in ultra-low temperature environment.

[0003] At present, when scholars at home and abroad conduct deformation tests on concrete in low or ultra-low temperature environments, they consider that sensors cannot work normally in ultra-low temperature environments. Therefore, they mainly place concrete specimens in low-temperature insulation boxes or refrigerators for cooling. After the specimen temperature reaches the requirement, they are quickly taken out for deformation testing. However, the concrete specimens tested in this way are not really in a low-temperature environment. Their temperature is easily changed with the surrounding high-temperature environment, and uneven temperature distribution will occur, resulting in inaccurate experimental results. In addition, the concrete specimens need to be repeatedly taken out for testing at different low-temperature stages, which is cumbersome and inefficient. Based on this, we propose a detection device for testing the deformation of concrete in low-temperature environments with high test accuracy and data accuracy. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a detection device and a testing method for testing the deformation amount of concrete in a low-temperature environment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A detection device for testing the deformation amount of concrete in a low-temperature environment, comprising a refrigeration box arranged on the top surface of a bracket, wherein the interior of the refrigeration box is composed of a refrigeration chamber and a normal temperature chamber from top to bottom; a cover is arranged on the top outer wall of the refrigeration box, and guide columns are fixedly connected to the four corners of the bottom of the cover, the guide columns are slidably connected to the inner wall of the refrigeration box, and the bottom ends of the guide columns are connected to the four corners of the top of the partition plate through bolts;

[0007] A control panel is fixedly connected to an outer wall of one side of the refrigeration box;

[0008] A fixing frame is fixedly connected to one side of the bracket, and a material transporting part 1 and a material transporting part 2 are respectively arranged on the bottom inner wall and one side of the fixing frame;

[0009] The inner wall of the refrigeration chamber is slidably connected with a partition plate, and the top outer wall of the partition plate is provided with a specimen clamping portion.

[0010] Preferably: the material transport part comprises an air cylinder fixedly connected to the inner wall of the bottom of the fixing frame, a piston rod slidably connected to the inner wall of the air cylinder, a folding air bag fixedly connected to the inner wall of the bottom of the fixing frame, a first support plate fixedly connected to the top of the folding air bag, and a positioning column slidably connected to the inner wall of the first support plate;

[0011] The top end of the piston rod is fixedly connected to the bottom outer wall of the second support plate, the bottom end of the positioning column is fixedly connected to the bottom inner wall of the fixing frame, and the circumferential outer wall of the air cylinder is connected to the input end of the folding airbag through a conduit.

[0012] Preferably: the second material transport part comprises an electric slide arranged on the opposite side of the fixed frame, and a second support plate slidably connected to the inner wall of the electric slide through a slider;

[0013] The second supporting plate and the top surface of the cover are fixedly connected with a connecting rod in an L-shaped structure.

[0014] Preferably: the specimen clamping part comprises a fixed block fixedly connected to the outer wall of the top of the partition plate, a linkage plate slidably connected to the inner wall on the opposite side of the fixed block, a clamping plate fixedly connected to the top surface of the linkage plate, and a sliding rod plugged into the inner wall of the linkage plate near the bottom end, and a groove is provided on the inner wall of the bottom of the partition plate below the fixed block, the linkage plate penetrates the groove, and the linkage plate and the groove form a sliding fit;

[0015] The outer wall of the sliding rod close to one end and a side surface of the linkage plate are fixedly connected with the same elastic member.

[0016] Preferably: a temperature barrier is provided on one side of the groove and the linkage plate, and the temperature barrier is composed of a temperature insulation block and a folding shield fixedly connected to the top and bottom surfaces of the temperature insulation block.

[0017] Preferably: a push plate is fixed to the inner wall of the fixed block through a connecting plate, a positioning plate is fixedly connected to the top outer wall of the partition plate facing the push plate, a long rod is provided on the bottom inner wall of the positioning plate, the long rod passes through the partition plate, and the long rod and the partition plate form a sliding fit;

[0018] The bottom end of the long rod and the bottom outer wall of the partition plate are fixedly connected with a same buffer, and the buffer is wrapped around the outer wall of the long rod; the top end of the long rod is connected to the limit plate through a sliding portion;

[0019] The sliding part comprises a connecting block rotatably connected to the top end of the long rod and a movable groove arranged on the outer wall of one side of the limiting plate.

[0020] Preferably: the opposite side surfaces of the two linkage plates are fixedly connected with a same displacement meter B;

[0021] A displacement meter A is fixedly connected to the bottom end of the long rod.

[0022] Preferably: the top outer wall of the cover is fixedly connected with a top support member, the extended end of the top support member is fixedly connected with a telescopic pressure plate in an L-shaped structure, the bottom surface of the telescopic pressure plate is provided with a thermal insulation pad, and the inner wall of the thermal insulation pad is fixed with a pressure sensor.

[0023] Preferably: the inner wall surface of the refrigeration box is provided with a heat-insulating layer; the bottom edge of the cover is provided with sealing strips;

[0024] A thermometer is fixedly connected to an outer wall of one side of the refrigeration box;

[0025] A slide rail is arranged on one side outer wall of the refrigeration box, and a box door is slidably connected to the inner wall of the slide rail via a slider.

[0026] A method for testing a detection device for testing the deformation of concrete in a low-temperature environment comprises the following steps:

[0027] S1: The concrete specimen to be tested is transported to the top of the refrigeration box through the material transport part 1 and the material transport part 2, and the cover rises under the linkage of the material transport part 2, so that the refrigeration chamber is opened;

[0028] S2: The concrete specimen to be tested is transferred to the fixed block, and the specimen clamping part, the long rod and the push plate are used to fix the position of the concrete specimen to be tested, and the second material conveying part is adjusted to control the cover to move downward so that the refrigeration chamber is closed;

[0029] S3: Adjust different low temperature test stages and corresponding test duration parameters of the concrete specimen through the control panel;

[0030] S4: Based on the displacement distance detection of the two linkage plates at different test stages by the displacement meter B, and the displacement distance detection of the bottom surface of the separation plate and the bottom end of the long rod at different test stages by the displacement meter A, the deformation results of the peripheral size and thickness of the concrete specimen are obtained;

[0031] S5: The pressure on the upper surface of the concrete specimen is pressed down by adjusting the telescopic pressure plate through the top support member to obtain the compressive deformation of the concrete specimen at different low temperature stages.

[0032] The beneficial effects of the present invention are:

[0033] 1. The present invention provides a refrigeration chamber and a normal temperature chamber which are independently arranged from each other. It is convenient to use the refrigeration chamber to detect the deformation of concrete specimens under different low-temperature environments. At the same time, the normal temperature chamber is convenient for storing detection elements, which avoids abnormal operation of the detection elements under low-temperature environments, ensures the test accuracy of the concrete specimens, and avoids the tedious work of repeatedly taking and placing the concrete specimens, thereby improving the test efficiency.

[0034] 2. The present invention sets a material conveying part one and a material conveying part two, starts the electric slide to drive the second pallet to rise, and then drives the cover to move up through the connecting rod, so that the refrigeration chamber is automatically opened, and when the second pallet rises, it will drive the piston rod to be lifted in the air cylinder, and then exhaust air from the folding airbag through the conduit, so that the first pallet moves slowly downward along the positioning column, and adjusts the distance between the first pallet and the second pallet to the maximum, so that the concrete specimen on the second pallet can be transferred to the refrigeration chamber, and the concrete specimen to be tested is placed on the first pallet, which is easy to use.

[0035] 3. When the second pallet of the present invention moves downward, the piston rod compresses the air cylinder, so that the gas therein is gradually transported to the folding airbag through the conduit, and the inflated folding airbag pushes the first pallet to rise along the positioning column, thereby automatically adjusting the distance between the first pallet and the second pallet to the minimum, thereby facilitating the transfer of the concrete specimen to be tested on the first pallet to the second pallet, saving manpower in the entire transportation process.

[0036] 4. The present invention provides a specimen clamping portion so that the periphery of the concrete specimen is firmly fixed, flips the limit plate on the long rod to a horizontal state, and pushes the limit plate to move back and forth through the movable groove, so that the bottom surface of the limit plate is tightly attached to the top surface of the concrete specimen under the pulling of the buffer, providing support for testing the thickness deformation of the concrete specimen.

[0037] 5. According to the height of the concrete specimen, the present invention starts the top support member to drive the telescopic pressure plate to press down the upper surface of the concrete specimen. When the pressure sensor detects that the pressure reaches the set value, it transmits a signal to the control panel, which controls the top support member to close, and then the compressive deformation of the concrete specimen in different low-temperature stages can be detected to obtain more comprehensive test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a rear-view unfolded structural schematic diagram of a detection device for testing the deformation amount of concrete in a low-temperature environment proposed by the present invention;

[0039] Figure 2 This is a front structural schematic diagram of a detection device for testing the deformation amount of concrete in a low-temperature environment proposed by the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of a detection device for testing the deformation of concrete in a low-temperature environment in a top view in an unpacked state proposed by the present invention;

[0041] Figure 4 A schematic diagram of the cover structure of a detection device for testing the deformation amount of concrete in a low-temperature environment proposed by the present invention, viewed from above;

[0042] Figure 5A schematic diagram of a top view of a partition plate of a detection device for testing the deformation amount of concrete in a low-temperature environment proposed by the present invention;

[0043] Figure 6 A schematic diagram of the side structure of a partition plate of a detection device for testing the deformation amount of concrete in a low-temperature environment proposed by the present invention;

[0044] Figure 7 A schematic diagram of the cross-sectional structure of a temperature barrier portion of a detection device for testing the deformation of concrete in a low-temperature environment proposed by the present invention;

[0045] Figure 8 The present invention provides a circuit flow diagram of a detection device for testing the deformation of concrete in a low-temperature environment.

[0046] In the figure: 1 bracket, 2 refrigeration box, 3 control panel, 4 thermometer, 5 top support, 6 cover, 7 slide rail, 8 box door, 9 constant temperature room, 10 buffer, 11 fixed frame, 12 connecting rod, 13 electric slide, 14 second support plate, 15 first support plate, 16 positioning column, 17 folding airbag, 18 air cylinder, 19 guide column, 20 limit plate, 21 fixed block, 22 partition plate, 23 telescopic pressure plate, 24 sealing strip, 25 insulation pad, 26 clamping plate, 27 movable groove, 28 long rod, 29 positioning plate, 30 displacement meter A, 31 folding baffle, 32 elastic member, 33 displacement meter B, 34 slide bar, 35 linkage plate, 36 insulation block. DETAILED DESCRIPTION

[0047] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0050] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0051] Embodiment 1:

[0052] A detection device for testing the deformation of concrete in low temperature environment, such as Figure 1-3 and Figure 8 As shown, it includes a refrigeration box 2 placed on the top surface of the bracket 1. The interior of the refrigeration box 2 is composed of a refrigeration chamber and a normal temperature chamber 9 from top to bottom. It is convenient to use the refrigeration chamber to detect the deformation of the concrete specimen under different low-temperature environments. At the same time, the normal temperature chamber 9 is convenient for storing the detection elements to avoid abnormal operation of the detection elements under low-temperature environments, thereby ensuring the accuracy of the test; a slide rail 7 is provided on the outer wall of one side of the refrigeration box 2, and the inner wall of the slide rail 7 is slidably connected to a box door 8 through a slider; the box door 8 is pushed up and down in the slide rail 7, so that people can inspect and adjust the situation in the normal temperature chamber 9.

[0053] Furthermore, a control panel 3 is fixed to one side of the outer wall of the refrigeration box 2 by bolts, which is convenient for adjusting the corresponding test time of the concrete specimen at different low temperatures; a thermometer 4 for detecting the temperature of the refrigeration chamber is fixed to one side of the outer wall of the refrigeration box 2 by bolts, and the thermometer 4 is communicated with the control panel 3; the inner wall surface of the refrigeration box 2 is filled with an insulation layer to slow down the loss of cold air in the refrigeration chamber, such as Figure 3 shown, not labeled;

[0054] like Figure 3 and Figure 5-8 As shown, in order to fix the concrete specimen, the inner wall of the refrigeration chamber is slidably connected with a partition plate 22, and the top outer wall of the partition plate 22 is provided with a specimen clamping part, which includes a fixed block 21 fixed to the top outer wall of the partition plate 22 by bolts, a linkage plate 35 slidably connected to the inner wall on the opposite side of the fixed block 21, a clamping plate 26 fixed to the top surface of the linkage plate 35 by bolts, and a sliding rod 34 plugged into the inner wall of the linkage plate 35 near the bottom end, and a groove is provided on the bottom inner wall of the partition plate 22 located below the fixed block 21, and the linkage plate 35 passes through the groove, and the linkage plate 35 forms a sliding fit with the groove;

[0055] Preferably, a temperature barrier portion is provided on one side of the groove and the linkage plate 35, and the temperature barrier portion is composed of a thermal insulation block 36 and a folding baffle 31 bonded to the top and bottom surfaces of the thermal insulation block 36; when the linkage plate 35 slides in the groove, the temperature barrier portion is passively stretched or squeezed to completely block the groove, preventing the cold air in the refrigeration room from flowing into the constant temperature room 9, thereby reducing the impact on the detection element.

[0056] Preferably, the outer wall of the slide bar 34 near one end and one side of the linkage plate 35 are welded with the same elastic member 32; the clamping plates 26 in relative positions are separated, and then the concrete specimen is placed on the fixed block 21, and the two linkage plates 35 are elastically squeezed by the elastic member 32 on one side and move toward the middle on the slide bar 34 at the same time, so that the concrete specimen is clamped by the two clamping plates 26, thereby completing the fixation work on it.

[0057] Preferably, the same displacement meter B33 is fixed to the opposite side of the two linkage plates 35 by bolts, and the displacement meter B33 is communicated with the control panel 3; during the refrigeration period of the refrigeration chamber, the displacement spacing of the two linkage plates 35 in different test stages is detected by the displacement meter B33 in the constant temperature chamber 9, and then the deformation result of the peripheral size of the concrete specimen is obtained.

[0058] like Figure 3 and Figure 5 and Figure 8 As shown, in order to obtain the height deformation of the concrete specimen, the inner wall of the fixed block 21 is fixed with a push plate through a connecting plate, and a positioning plate 29 is fixed with bolts on the top outer wall of the partition plate 22 facing the push plate, and a long rod 28 is inserted into the bottom inner wall of the positioning plate 29, and the long rod 28 passes through the partition plate 22, and the long rod 28 and the partition plate 22 form a sliding fit, and the bottom end of the long rod 28 and the bottom outer wall of the partition plate 22 are welded with the same buffer 10, and the buffer 10 is wrapped around the outer wall of the long rod 28; the top end of the long rod 28 is connected to the limiting plate 20 through a sliding portion;

[0059] Further, the sliding part includes a connecting block rotatably connected to the top of the long rod 28 and a movable groove 27 provided on the outer wall of one side of the limiting plate 20; after the two sides of the concrete specimen are clamped and fixed by the specimen clamping part, one side of the concrete specimen is adjusted to fit with one side of the long rod 28, and then the extension of the push plate is adjusted through the connecting plate so that the four sides of the concrete specimen are firmly fixed, and then the limiting plate 20 is turned over on the long rod 28 to a horizontal state, and the limiting plate 20 is pushed to move forward and backward through the movable groove 27, so that at this time, the bottom surface of the limiting plate 20 is tightly fitted to the top surface of the concrete specimen under the pulling of the buffer 10;

[0060] Preferably, a displacement meter A30 for detecting the height deformation of the concrete specimen is fixed to the bottom end of the long rod 28 by bolts, and the displacement meter A30 is communicated with the control panel 3; during the refrigeration period of the refrigeration chamber, the displacement distance between the bottom surface of the partition plate 22 and the bottom end of the long rod 28 in different test stages is detected by the displacement meter A30 in the constant temperature chamber 9, thereby obtaining the deformation result of the height, i.e., thickness, of the concrete specimen.

[0061] like Figure 1-4 As shown, in order to facilitate opening of the cover 6, the top outer wall of the refrigeration box 2 is clamped with the cover 6, and the four corners of the bottom of the cover 6 are fixedly connected with guide columns 19, the guide columns 19 are slidably connected to the inner wall of the refrigeration box 2, and the bottom ends of the guide columns 19 are connected to the four corners of the top of the partition plate 22 by bolts; when the cover 6 is opened, it moves vertically upward through the guide columns 19, and drives the partition plate 22 to move synchronously in the refrigeration room, thereby shortening the time for placing the concrete specimens.

[0062] Preferably, in order to improve the sealing performance of the refrigeration chamber, a sealing strip 24 is clamped on the four edges of the bottom of the cover 6 to prevent the cold air from leaking out;

[0063] Further, if Figure 1 and Figure 4 , Figure 8 As shown, a top support member 5 is fixed to the top outer wall of the cover 6 by bolts, and the top support member 5 is communicatively connected with the control panel 3. A telescopic pressure plate 23 with an L-shaped structure is fixed to the extended end of the top support member 5 by bolts, and a thermal insulation pad 25 is bonded to the bottom surface of the telescopic pressure plate 23. A pressure sensor is fixed to the inner wall of the thermal insulation pad 25. The model of the pressure sensor is JYB-KB-CW2000. The top support member 5, the pressure sensor and the control panel 3 are communicatively connected. According to the surface size of the concrete specimen, the extension length of the telescopic pressure plate 23 is adjusted. After closing the cover 6, according to the height of the concrete specimen, the top support member 5 is started to drive the telescopic pressure plate 23 to press down the upper surface of the concrete specimen. When the pressure sensor detects that the pressure reaches the set value, it transmits a signal to the control panel 3, which controls the top support member 5 to close, and then the compressive deformation of the concrete specimen in different low temperature stages can be detected to obtain a more comprehensive test result.

[0064] In order to facilitate the transportation of concrete specimens into the refrigeration room; Figure 1-3As shown, a fixing frame 11 is fixed to one side of the bracket 1 by bolts, and a material conveying part 1 and a material conveying part 2 are respectively arranged on the bottom inner wall and one side of the fixing frame 11, and the material conveying part 1 includes an air cylinder 18 fixed to the bottom inner wall of the fixing frame 11 by bolts, a piston rod slidably connected to the inner wall of the air cylinder 18, a folding air bag 17 fixed to the bottom inner wall of the fixing frame 11 by bolts, a first support plate 15 fixed to the top end of the folding air bag 17 by bolts, and a positioning column 16 slidably connected to the inner wall of the first support plate 15, and the top end of the piston rod is fixed to the bottom outer wall of the second support plate 14 by bolts, and the bottom end of the positioning column 16 is fixed to the bottom inner wall of the fixing frame 11 by bolts, and the circumferential outer wall of the air cylinder 18 is connected to the input end of the folding air bag 17 through a conduit;

[0065] Furthermore, the second material transport part includes an electric chute 13 provided on a side opposite to the fixed frame 11, and a second support plate 14 slidably connected to the inner wall of the electric chute 13 through a slider;

[0066] Preferably, in order to enable the cover 6 to open as the concrete specimen on the second support plate 14 approaches, the second support plate 14 and the top surface of the cover 6 are fixed with a connecting rod 12 in an L-shaped structure by bolts;

[0067] The electric slide 13 is started to drive the second support plate 14 to rise, and then the cover 6 is driven to move upward through the connecting rod 12, so that the refrigeration chamber is automatically opened. When the second support plate 14 rises, it will drive the piston rod to lift up in the air cylinder 18, and then the air is extracted from the folding air bag 17 through the conduit, so that the first support plate 15 moves down slowly along the positioning column 16, and the distance between the first support plate 15 and the second support plate 14 is adjusted to the maximum, so that the concrete specimen on the second support plate 14 can be transferred to the refrigeration chamber, and the concrete specimen to be tested can be placed on the first support plate 1 5, and then close the electric slide 13 to make the second support plate 14 passively move down. When the second support plate 14 moves down, the piston rod presses the air cylinder 18, so that the gas therein is gradually transported to the folding air bag 17 through the conduit. The inflated folding air bag 17 pushes the first support plate 15 to rise along the positioning column 16, and then automatically adjusts the distance between the first support plate 15 and the second support plate 14 to the minimum, so as to facilitate the transfer of the concrete specimen to be tested on the first support plate 15 to the second support plate 14, which is convenient to use and saves manpower for the whole process of transportation.

[0068] Before using the present embodiment, the electric slide 13 is started to drive the second support plate 14 to rise, and then the cover 6 is driven to move upward through the connecting rod 12. When the cover 6 moves, the partition plate 22 is driven to move synchronously in the refrigeration chamber through the guide column 19, so that the refrigeration chamber is automatically opened. When the second support plate 14 rises, the piston rod is driven to lift up in the air cylinder 18, and then air is extracted from the folding airbag 17 through the catheter, so that the first support plate 15 is slowly moved down along the positioning column 16, and the distance between the first support plate 15 and the second support plate 14 is adjusted to be pulled to the maximum, so that the second support plate 14 can be moved upward. The concrete specimen is transferred into the refrigeration room, and the concrete specimen to be tested is placed on the first support plate 15, and then the electric slide 13 is closed to make the second support plate 14 passively move downward. When the second support plate 14 moves downward, the piston rod presses the air cylinder 18, so that the gas therein is gradually transported to the folding air bag 17 through the conduit. The inflated folding air bag 17 pushes the first support plate 15 to rise along the positioning column 16, and then automatically adjusts the distance between the first support plate 15 and the second support plate 14 to the minimum, so as to facilitate the transfer of the concrete specimen to be tested on the first support plate 15 to the second support plate 14.

[0069] When placing the concrete specimen into the refrigeration chamber, the clamping plates 26 in relative positions are first separated, and then the concrete specimen is placed on the fixed block 21. The two linkage plates 35 are elastically squeezed by the elastic member 32 on one side and move toward the middle on the slide rod 34 at the same time. Moreover, when the linkage plate 35 slides in the groove, the temperature barrier portion is passively stretched or squeezed to completely block the groove to prevent the cold air in the refrigeration chamber from flowing into the constant temperature chamber 9. Adjust one side of the concrete specimen to fit with one side of the long rod 28, and then adjust the extension of the push plate through the connecting plate so that the four sides of the concrete specimen are firmly fixed, and then flip the limit plate 20 on the long rod 28 to a horizontal state, and push the limit plate 20 to move forward and backward through the movable groove 27, so that at this time, the bottom surface of the limit plate 20 is tightly fitted to the top surface of the concrete specimen under the pulling of the buffer member 10, and then adjust the extension length of the telescopic pressing plate 23 according to the surface size of the concrete specimen, so that the top of the concrete specimen can be pressed when the cover 6 is closed.

[0070] Before the formal test, the different low-temperature stages of the concrete specimen and the corresponding test duration are adjusted through the control panel 3. During the refrigeration period of the refrigeration chamber, the displacement spacing of the two linkage plates 35 in different test stages is detected by the displacement meter B33 in the normal temperature chamber 9, so as to obtain the deformation results of the peripheral dimensions of the concrete specimen; the displacement spacing between the bottom surface of the separating plate 22 and the bottom end of the long rod 28 in different test stages is detected by the displacement meter A30 in the normal temperature chamber 9, so as to obtain the deformation results of the height, i.e., thickness of the concrete specimen; after closing the cover 6, according to the height of the concrete specimen, the top support member 5 is started to drive the telescopic pressure plate 23 to press down the upper surface of the concrete specimen, and when the pressure sensor detects that the pressure reaches the set value, it transmits a signal to the control panel 3, which controls the top support member 5 to close, so as to detect the compressive deformation of the concrete specimen in different low-temperature stages.

[0071] Embodiment 2:

[0072] A method for testing the deformation of concrete in a low temperature environment by the detection device described in Example 1, as follows Figure 1-8 As shown, the following steps are included:

[0073] S1: The concrete specimen to be tested is transported to the top of the refrigeration box 2 through the material transport part 1 and the material transport part 2, and the cover 6 is raised under the linkage of the material transport part 2, so that the refrigeration chamber is opened;

[0074] S2: The concrete specimen to be tested is transferred to the fixed block 21, and the specimen clamping part, the long rod 28 and the push plate are used to fix the position of the concrete specimen to be tested, and the material conveying part 2 is adjusted to control the cover 6 to move downward so that the refrigeration chamber is closed;

[0075] S3: adjusting different low temperature test stages and corresponding test duration parameters of the concrete specimen via the control panel 3;

[0076] S4: According to the displacement distance detection of the two linkage plates 35 at different test stages by the displacement meter B33, and the displacement distance detection of the bottom surface of the separation plate 22 and the bottom end of the long rod 28 at different test stages by the displacement meter A30, the deformation results of the peripheral size and thickness of the concrete specimen are obtained;

[0077] S5: The pressure of the upper surface of the concrete specimen is pressed downward by adjusting the telescopic pressing plate 23 through the top support member 5 to obtain the compressive deformation of the concrete specimen at different low temperature stages.

[0078] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detection device for testing the deformation of concrete in a low-temperature environment, comprising a refrigeration box (2) arranged on the top surface of a support (1), characterized in that: The interior of the refrigeration box (2) is composed of a refrigeration chamber and a normal temperature chamber (9) from top to bottom; a cover (6) is provided on the top outer wall of the refrigeration box (2); guide columns (19) are fixedly connected to the four corners of the bottom of the cover (6); the guide columns (19) are slidably connected to the inner wall of the refrigeration box (2), and the bottom ends of the guide columns (19) are connected to the four corners of the top of the partition plate (22) by bolts; A control panel (3) is fixedly connected to an outer wall of one side of the refrigeration box (2); A fixing frame (11) is fixedly connected to one side of the bracket (1), and a material transporting part 1 and a material transporting part 2 are respectively provided on the bottom inner wall and one side of the fixing frame (11); The inner wall of the refrigeration chamber is slidably connected with a partition plate (22), and the top outer wall of the partition plate (22) is provided with a specimen clamping portion; The material transport part comprises an air cylinder (18) fixedly connected to the inner wall of the bottom of the fixing frame (11), a piston rod slidably connected to the inner wall of the air cylinder (18), a folding air bag (17) fixedly connected to the inner wall of the bottom of the fixing frame (11), a first support plate (15) fixedly connected to the top of the folding air bag (17), and a positioning column (16) slidably connected to the inner wall of the first support plate (15); The top end of the piston rod is fixedly connected to the bottom outer wall of the second support plate (14), the bottom end of the positioning column (16) is fixedly connected to the bottom inner wall of the fixing frame (11), and the circumferential outer wall of the air cylinder (18) is connected to the input end of the folding air bag (17) through a conduit; The specimen clamping portion comprises a fixed block (21) fixedly connected to the outer wall of the top of the partition plate (22), a linkage plate (35) slidably connected to the inner wall of the opposite side of the fixed block (21), a clamping plate (26) fixedly connected to the top surface of the linkage plate (35), and a sliding rod (34) plugged into the inner wall of the linkage plate (35) near the bottom end, and a groove is provided on the inner wall of the bottom of the partition plate (22) located below the fixed block (21), the linkage plate (35) penetrates the groove, and the linkage plate (35) forms a sliding fit with the groove; The outer wall of the sliding rod (34) close to one end and one side surface of the linkage plate (35) are fixedly connected to the same elastic member (32); The inner wall of the fixed block (21) is fixed with a push plate via a connecting plate, the top outer wall of the partition plate (22) facing the push plate is fixedly connected with a positioning plate (29), the bottom inner wall of the positioning plate (29) is provided with a long rod (28), the long rod (28) penetrates the partition plate (22), and the long rod (28) and the partition plate (22) form a sliding fit; The bottom end of the long rod (28) and the bottom outer wall of the partition plate (22) are fixedly connected with a same buffer member (10), and the buffer member (10) is wrapped around the outer wall of the long rod (28); the top end of the long rod (28) is connected to the limit plate (20) via a sliding portion; The sliding portion comprises a connecting block rotatably connected to the top end of the long rod (28) and a movable groove (27) provided on an outer wall of one side of the limiting plate (20); A top support member (5) is fixedly connected to the top outer wall of the cover (6); an extended end of the top support member (5) is fixedly connected to a telescopic pressure plate (23) in an L-shaped structure; a thermal insulation pad (25) is provided on the bottom surface of the telescopic pressure plate (23); and a pressure sensor is fixed to the inner wall of the thermal insulation pad (25).

2. A detection device for testing the deformation of concrete in low temperature environment according to claim 1, characterized in that: The second material transport part comprises an electric slide (13) arranged on an opposite side of the fixed frame (11), and a second support plate (14) slidably connected to the inner wall of the electric slide (13) via a slider; A connecting rod (12) having an L-shaped structure is fixedly connected to the top surface of the second supporting plate (14) and the cover (6).

3. A detection device for testing the deformation of concrete in low temperature environment according to claim 2, characterized in that: A temperature barrier is provided on one side of the groove and linkage plate (35), and the temperature barrier is composed of a temperature insulation block (36) and a folding shield (31) fixedly connected to the top and bottom surfaces of the temperature insulation block (36).

4. A detection device for testing the deformation of concrete in low temperature environment according to claim 3, characterized in that: The same displacement meter B (33) is fixedly connected to opposite sides of the two linkage plates (35); A displacement meter A (30) is fixedly connected to the bottom end of the long rod (28).

5. The detection device for testing the deformation of concrete in low temperature environment according to claim 1, characterized in that: The inner wall surface of the refrigeration box (2) is provided with a heat-insulating layer; the bottom edge of the cover (6) is provided with sealing strips (24); A thermometer (4) is fixedly connected to an outer wall of one side of the refrigeration box (2); A slide rail (7) is provided on one outer wall of the refrigeration box (2), and a box door (8) is slidably connected to the inner wall of the slide rail (7) via a slider.

6. The testing method of the detection device for testing the deformation amount of concrete in low temperature environment according to claim 4 is characterized in that: The following steps are involved: S1: The concrete specimen to be tested is transported to the top of the refrigeration box (2) via the material transport unit 1 and the material transport unit 2, and the cover (6) rises under the linkage of the material transport unit 2, so that the refrigeration chamber is opened; S2: the concrete specimen to be tested is transferred to the fixed block (21), the specimen clamping part, the long rod (28) and the push plate are used to fix the position of the concrete specimen to be tested, and the second material conveying part is adjusted to control the cover (6) to move downward so that the refrigeration chamber is closed; S3: adjusting different low temperature test stages and corresponding test duration parameters of the concrete specimen via the control panel (3); S4: According to the displacement distance detection of the two linkage plates (35) at different test stages by the displacement meter B (33), and the displacement distance detection of the bottom surface of the separation plate (22) and the bottom end of the long rod (28) at different test stages by the displacement meter A (30), the deformation results of the peripheral size and thickness of the concrete specimen are obtained; S5: The pressure of the upper surface of the concrete specimen is pressed downward by adjusting the telescopic pressing plate (23) through the top support member (5), and the compressive deformation of the concrete specimen at different low temperature stages is obtained.

Images