Device for detecting shrinkage deformation of concrete

Abstract

The utility model provides a device for detecting concrete shrinkage deformation. When the device is used, a concrete sample is put into a test cavity of a concrete test mold. When the concrete begins to shrink (due to hydration and other processes), the position of the reflecting piece can also change relative to the detection piece. A detection member (laser rangefinder or other type of distance measuring device) measures the distance between it and the reflector. And calculating the shrinkage amount of the concrete through the change of the distance. Compared with a disposable corrugated pipe, the concrete test mold is detachable and reusable, so that the material cost is reduced. Measurement errors may be caused by deformation of a traditional corrugated pipe. Due to the stable structural design of the device for detecting concrete shrinkage deformation, measurement errors caused by equipment deformation can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of construction, and in particular to a device for detecting shrinkage and deformation of concrete. Background Art

[0002] After concrete is poured, it first undergoes shrinkage due to water seepage before setting, shrinkage due to aggregate sinking, etc. After setting, the cement in the concrete hydrates and the volume shrinks, which is called hydration shrinkage or chemical shrinkage.

[0003] After the concrete has hardened, the formwork is removed and the concrete surface comes into contact with the air, causing water loss and drying shrinkage, which is referred to as shrinkage.

[0004] In order to test the shrinkage caused by the hydration of cement in concrete, the existing detection method is to fill the corrugated tube with concrete mixture, then fix one end of the corrugated tube and measure the deformation at the other end using a digital micrometer.

[0005] However, the following problems exist when using bellows for measurement: bellows are disposable and cannot be used a second time, resulting in large losses. A new bellows must be used for each test. Secondly, the bellows will deform during use, which will increase the error in the test process. Utility Model Content

[0006] In view of this, it is necessary to provide a device for detecting shrinkage deformation of concrete to solve the above problems.

[0007] An embodiment of the present application provides a device for detecting shrinkage deformation of concrete, comprising:

[0008] A test bench, wherein a test position is provided on the test bench;

[0009] A concrete test mold is formed with a test cavity, the concrete test mold is detachably arranged on the test table, and the test cavity is used to accommodate concrete to be tested;

[0010] A detection component is arranged on the test table and faces the test cavity;

[0011] A reflector, disposed in the test cavity and used for being placed on the concrete to be tested;

[0012] The detection element detects the distance from the reflector placed on the concrete to be detected to the detection element to calculate the shrinkage value.

[0013] In at least one embodiment of the present application, the concrete test mold is located between the test bench and the detection member;

[0014] The reflective element is located between the concrete test mold and the detection element.

[0015] In at least one embodiment of the present application, the detection element is a laser rangefinder;

[0016] The laser emitted by the detection member is reflected by the reflection member to detect the distance between the detection member and the reflection member to determine the displacement distance of the reflection member.

[0017] In at least one embodiment of the present application, the reflective element is located on the path of the laser emitted by the detection element.

[0018] In at least one embodiment of the present application, a fixing rod is provided on the test bench, and the axis of the fixing rod is arranged along the direction from the concrete test mold to the detection member;

[0019] The device for detecting shrinkage and deformation of concrete also includes:

[0020] The moving rod, the detecting member is arranged at one end of the moving rod, and the other end of the moving rod is slidably connected with the fixed rod to drive the detecting member to move along the axial direction of the fixed rod.

[0021] In at least one embodiment of the present application, a locking screw hole is formed at one end of the moving rod away from the detection member;

[0022] The device for detecting shrinkage and deformation of concrete also includes:

[0023] The locking piece has a movable end at one end and a threaded end at the other end. The threaded end passes through the locking screw hole and abuts against the fixing rod to fix the moving rod on the fixing rod.

[0024] In at least one embodiment of the present application, the device for detecting shrinkage deformation of concrete further includes:

[0025] The cover is arranged on the concrete to be tested in the test cavity to prevent the evaporation of water.

[0026] In at least one embodiment of the present application, the reflective element is placed on the covering element.

[0027] In at least one embodiment of the present application, the detection member is connected to an external detection device to analyze the shrinkage value of the concrete to be detected through the data obtained by the detection member.

[0028] In at least one embodiment of the present application, the test cavity is a through cavity, the concrete test mold is placed on the test position so that the test position covers one end of the concrete test mold, and the cover is arranged at the other end of the concrete test mold away from the test position.

[0029] The device for detecting shrinkage and deformation of concrete provided above is provided by placing a concrete sample into a test cavity of a concrete test mold.

[0030] When the concrete begins to shrink (due to processes such as hydration), the position of the reflector relative to the detector will also change.

[0031] The detecting element (laser rangefinder or other type of distance measuring device) measures the distance between it and the reflecting element.

[0032] The shrinkage of concrete is calculated by the change in distance.

[0033] Compared with disposable corrugated pipes, concrete test molds are detachable and reusable, reducing material costs.

[0034] Traditional bellows may cause measurement errors due to their own deformation. However, the device for detecting concrete shrinkage deformation can effectively reduce the measurement errors caused by equipment deformation due to its stable structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the structure of the device for shrinkage and deformation of concrete in this embodiment;

[0036] Figure 2 for Figure 1 Exploded view of the device for measuring shrinkage and deformation of concrete;

[0037] Figure 3 for Figure 1 A cross-sectional view of the device for reducing concrete shrinkage and deformation in use.

[0038] Main component symbols

[0039] 100. Device for detecting shrinkage and deformation of concrete;

[0040] 110. test bench; 111. fixing rod;

[0041] 120, concrete test mold; 120a, test cavity;

[0042] 130. Inspection parts;

[0043] 140. Reflective parts;

[0044] 150, moving rod; 150a, locking screw hole;

[0045] 160, locking piece; 161, movable end; 162, threaded end;

[0046] 170. Covering parts;

[0047] 200. Concrete. DETAILED DESCRIPTION

[0048] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0049] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0050] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0051] The embodiment of the present application provides a device 100 for detecting shrinkage deformation of concrete, comprising:

[0052] A test bench 110, wherein the test bench 110 is provided with a test position (not shown in the figure);

[0053] A concrete test mold 120 is formed with a test cavity 120a. The concrete test mold 120 is detachably disposed on the test bench 110. The test cavity 120a is used to accommodate concrete to be tested;

[0054] The detection member 130 is disposed on the test table 110 and faces the test cavity 120a;

[0055] A reflector 140 is disposed in the test cavity 120a and is used to be placed on the concrete to be tested;

[0056] The detection member 130 detects the distance between the reflection member 140 placed on the concrete to be detected and the detection member 130 to calculate the shrinkage value.

[0057] Please refer to Figures 1 to 3 In this embodiment, the concrete sample is placed in the test cavity 120 a of the concrete test mold 120 .

[0058] When the concrete begins to shrink (due to processes such as hydration), the position of the reflector 140 relative to the detection member 130 will also change.

[0059] The detection member 130 (a laser rangefinder or other type of distance measuring device) measures the distance between it and the reflecting member 140 .

[0060] The shrinkage of concrete is calculated by the change in distance.

[0061] Compared with the disposable corrugated tube, the concrete test mold 120 is detachable and reusable, which reduces the material cost.

[0062] Traditional corrugated pipes may cause measurement errors due to their own deformation. However, the device 100 for detecting shrinkage deformation of concrete can effectively reduce the measurement errors caused by equipment deformation due to its stable structural design.

[0063] It should be noted that the test bench 110 is the basic platform of the device, which is used to place and fix other components. The test position is a specific area on the test bench 110, which is used to place the concrete test mold 120. The stability and repeatability of the test are guaranteed.

[0064] The concrete test mold 120 has a test cavity 120a. The test cavity 120a is used to accommodate the concrete sample to be tested. The concrete test mold 120 is detachably mounted on the test bench 110, which is convenient for placing and removing the sample and for cleaning and maintaining the test mold.

[0065] The detection member 130 is installed on the test bench 110 and directly faces the test cavity 120a. The function of the detection member 130 is to measure the distance between the reflector 140 and the detection member 130, so as to calculate the shrinkage of the concrete.

[0066] The reflector 140 is placed on the concrete to be tested and is located in the test cavity 120a. The reflector 140 serves as a reference for the test element 130 to measure.

[0067] In at least one embodiment of the present application, the concrete test mold 120 is located between the test bench 110 and the detection member 130;

[0068] The reflective element 140 is located between the concrete test mold 120 and the detection element 130 .

[0069] In at least one embodiment of the present application, the detection element 130 is a laser rangefinder;

[0070] The laser emitted by the detection member 130 is reflected by the reflection member 140 to detect the distance between the detection member 130 and the reflection member 140 , so as to determine the displacement distance of the reflection member 140 .

[0071] In at least one embodiment of the present application, the reflective element 140 is located on the path of the laser emitted by the detection element 130 .

[0072] Please refer to Figures 1 to 3In this embodiment, the concrete sample is placed in the test cavity 120 a of the concrete test mold 120 .

[0073] The laser rangefinder emits laser light, which hits the reflective element 140 and is reflected back.

[0074] The laser rangefinder receives the reflected laser and calculates the distance from the emission point to the reflection point.

[0075] As the concrete sample shrinks, the position of the reflector 140 changes, which causes the length of the laser reflection path to change.

[0076] By monitoring the change in this distance, the shrinkage of the concrete sample can be accurately calculated.

[0077] The use of laser rangefinders can greatly improve the accuracy of measurements and reduce errors caused by mechanical measurements or human operations.

[0078] Since the laser rangefinder is non-contact, it does not cause any physical disturbance to the concrete sample being tested, maintaining the integrity of the test.

[0079] The concrete test mold 120 is placed between the test bench 110 and the detection piece 130. The correct relative position between the concrete sample and the detection piece 130 is ensured, thereby ensuring the accuracy of the measurement.

[0080] The reflector 140 is placed between the concrete test mold 120 and the detection member 130 , directly above the concrete to be detected and in the straight path of the detection member 130 .

[0081] The laser emitted by the laser rangefinder is reflected by the reflector 140. By measuring the time from the emission to the reception (reflection back) of the laser, the distance between the detection element 130 and the reflector 140 can be accurately calculated.

[0082] The reflective element 140 is placed on the path of the laser to ensure that the laser can be effectively reflected back to the detection element 130 .

[0083] The reflective element 140 is a reflective element, such as a nail, a metal sheet, a reflective mirror, etc.

[0084] In at least one embodiment of the present application, a fixing rod 111 is provided on the test bench 110, and the axis of the fixing rod 111 is arranged along the direction from the concrete test mold 120 to the detection member 130;

[0085] The device 100 for detecting concrete shrinkage deformation further includes:

[0086] The moving rod 150 , the detecting member 130 is disposed at one end of the moving rod 150 , and the other end of the moving rod 150 is slidably connected to the fixing rod 111 to drive the detecting member 130 to move along the axial direction of the fixing rod 111 .

[0087] In at least one embodiment of the present application, a locking screw hole 150a is formed at one end of the moving rod 150 away from the detection member 130;

[0088] The device 100 for detecting concrete shrinkage deformation further includes:

[0089] The locking member 160 has a movable end 161 at one end and a threaded end 162 at the other end. The threaded end 162 passes through the locking screw hole 150 a and abuts against the fixing rod, so that the moving rod 150 is fixed on the fixing rod 111 .

[0090] In this embodiment, before testing, the concrete sample is placed in the testing cavity 120 a of the concrete test mold 120 .

[0091] As the concrete shrinks and deforms, the position of the reflector 140 changes.

[0092] This change is measured by the detection member 130 (such as a laser rangefinder). Since the detection member 130 is installed on the moving rod 150, it can move freely along the axis direction of the fixed rod 111 to adapt to the position change of the reflective member 140.

[0093] The movement amount of the detection member 130 is fixed by the mechanism of the locking screw hole 150a and the locking member 160, so as to accurately record the data of the shrinkage deformation of the concrete.

[0094] By allowing the detection member 130 to move along the axis of the fixing rod 111, minute changes in the concrete shrinkage process can be accurately tracked and measured.

[0095] The fixed rod 111 and the movable rod 150 ensure the stability of the entire device during the measurement process and reduce errors caused by vibration or deviation of the equipment.

[0096] The sliding connection design of the movable rod 150 and the fixed rod 111 provides the necessary flexibility to accommodate concrete samples of different sizes and shapes.

[0097] Twisting the movable end 161 can drive the locking piece 160 to move so that the locking piece 160 abuts against or does not abut against the fixed rod 111. When abutting, the movable rod 150 can be fixed relative to the fixed rod 111. When not abutting, the movable rod 150 can be movable relative to the fixed rod 111 to adjust the distance between the detection piece 130 and the reflection piece 140.

[0098] The design of the locking screw hole 150a and the locking member 160 ensures that once the detection position is set, it can remain fixed during the entire test process, thereby improving the reliability of the data.

[0099] A fixing rod 111 is provided on the test bench 110, and its axis is arranged along the direction from the concrete test mold 120 to the detection member 130, thereby ensuring the overall structural stability of the device and the directional consistency during the detection process.

[0100] One end of the mobile rod 150 is mounted with the detection member 130, and the other end is slidably connected to the fixed rod 111. Allowing the detection member 130 to move along the axis direction of the fixed rod 111 provides the flexibility required for measuring the shrinkage deformation of concrete.

[0101] A locking screw hole 150a is provided at one end of the moving rod 150 away from the detection member 130. One end of the locking member 160 is a movable end 161, and the other end is a threaded end 162, which passes through the locking screw hole 150a and abuts against the fixed rod. This allows the moving rod 150 to be fixed on the fixed rod 111, thereby ensuring the stability of the measurement.

[0102] The fixed rod 111 and the movable rod 150 are both rod-shaped, and the test bench 110 is planar.

[0103] In at least one embodiment of the present application, the device 100 for detecting shrinkage deformation of concrete further includes:

[0104] The cover 170 is disposed on the concrete to be tested in the test cavity 120a to prevent water from evaporating.

[0105] In at least one embodiment of the present application, the reflective member 140 is placed on the covering member 170 .

[0106] In at least one embodiment of the present application, the detection member 130 is connected to an external detection device to analyze the shrinkage value of the concrete to be detected through the data obtained by the detection member 130 .

[0107] In at least one embodiment of the present application, the test cavity 120a is a through cavity, the concrete test mold 120 is placed on the test position so that the test position covers one end of the concrete test mold 120, and the covering member is arranged at the other end of the concrete test mold 120 away from the test position.

[0108] Please refer to Figures 1 to 3 In this embodiment, the concrete sample is placed in the test cavity 120 a of the concrete test mold 120 .

[0109] The cover 170 covers the concrete sample to prevent water evaporation.

[0110] The reflective member 140 is placed on the cover member.

[0111] The detection element 130 (which may be a laser range finder) performs the measurement and transmits the data to an external device.

[0112] As the concrete shrinks, the position of the reflector 140 changes relative to the detection member 130 , and these changes are captured and recorded by the detection member 130 .

[0113] By using the cover 170 , the device can effectively control the evaporation of water during the test process, maintain the initial condition of the concrete sample 200 , and thus improve the accuracy of the measurement.

[0114] Placing the reflector 140 on the cover protects it from physical changes that may affect the accuracy of the measurement.

[0115] The specific test cavity 120a can ensure the stability and consistency of the concrete sample during the entire test process, thereby reducing the measurement error caused by the change of the sample position.

[0116] The test cavity 120a is a rectangular through cavity, and the cover is a film.

[0117] The cover is used to cover the concrete to be tested in the test cavity 120a, and its main function is to prevent the evaporation of water in the concrete sample. This is very important because the evaporation of water may affect the shrinkage characteristics of the concrete and the accuracy of the measurement results.

[0118] The reflector 140 is placed on the cover to ensure that the reflector 140 maintains a proper relative position with the concrete sample while protecting the reflector 140 from possible physical changes in the concrete sample.

[0119] The test cavity 120a is designed as a through cavity, and the concrete test mold 120 is placed on the test position so that one end is shielded by the test position. The cover is provided at the other end of the concrete test mold 120 away from the test position. This helps to maintain the stability and consistency of the concrete sample during the test process.

[0120] Thus, a device 100 for detecting shrinkage deformation of concrete is provided, comprising:

[0121] A test bench 110, wherein a test position is provided on the test bench 110;

[0122] A concrete test mold 120 is formed with a test cavity 120a. The concrete test mold 120 is detachably disposed on the test bench 110. The test cavity 120a is used to accommodate concrete 200 to be tested;

[0123] The concrete test mold 120 is placed on the test bench 110 .

[0124] The detection member 130 is disposed on the test table 110 and faces the test cavity 120a;

[0125] A reflector 140 is disposed in the test cavity 120a and is used to be placed on the concrete to be tested;

[0126] The detection member 130 detects the distance between the reflection member 140 placed on the concrete to be detected and the detection member 130 to calculate the shrinkage value.

[0127] Please refer to Figures 1 to 3 In this embodiment, the concrete sample is placed in the test cavity 120 a of the concrete test mold 120 .

[0128] When the concrete begins to shrink (due to processes such as hydration), the position of the reflector 140 relative to the detection member 130 will also change.

[0129] The detection member 130 (a laser rangefinder or other type of distance measuring device) measures the distance between it and the reflecting member 140 .

[0130] The shrinkage of concrete is calculated by the change in distance.

[0131] Compared with the disposable corrugated tube, the concrete test mold 120 is detachable and reusable, which reduces the material cost.

[0132] Traditional corrugated pipes may cause measurement errors due to their own deformation. However, the device 100 for detecting shrinkage deformation of concrete can effectively reduce the measurement errors caused by equipment deformation due to its stable structural design.

[0133] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A device for detecting shrinkage and deformation of concrete, characterized in that: include: A test bench, wherein a test position is provided on the test bench; A concrete test mold is formed with a test cavity, the concrete test mold is detachably arranged on the test table, and the test cavity is used to accommodate concrete to be tested; A detection component is arranged on the test table and faces the test cavity; A reflector, disposed in the test cavity and used for being placed on the concrete to be tested; The detection element detects the distance from the reflector placed on the concrete to be detected to the detection element to calculate the shrinkage value.

2. The device for detecting shrinkage and deformation of concrete according to claim 1, characterized in that: The concrete test mold is located between the test bench and the detection member; The reflective element is located between the concrete test mold and the detection element.

3. The device for detecting shrinkage and deformation of concrete according to claim 1, characterized in that: The detection element is a laser rangefinder; The laser emitted by the detection member is reflected by the reflection member to detect the distance between the detection member and the reflection member to determine the displacement distance of the reflection member.

4. The device for detecting shrinkage and deformation of concrete according to claim 3, characterized in that: The reflecting element is located on the path of the laser emitted by the detecting element.

5. The device for detecting shrinkage and deformation of concrete according to claim 1, characterized in that: The test bench is provided with a fixing rod, and the axis of the fixing rod is arranged along the direction from the concrete test mold to the detection piece; The device for detecting shrinkage and deformation of concrete also includes: The moving rod, the detecting member is arranged at one end of the moving rod, and the other end of the moving rod is slidably connected with the fixed rod to drive the detecting member to move along the axial direction of the fixed rod.

6. The device for detecting shrinkage and deformation of concrete according to claim 5, characterized in that: A locking screw hole is provided at one end of the moving rod away from the detection member; The device for detecting shrinkage and deformation of concrete also includes: The locking piece has a movable end at one end and a threaded end at the other end. The threaded end passes through the locking screw hole and abuts against the fixing rod to fix the moving rod on the fixing rod.

7. The device for detecting shrinkage and deformation of concrete according to claim 1, characterized in that: The device for detecting concrete shrinkage deformation also includes: The cover is arranged on the concrete to be tested in the test cavity to prevent the evaporation of water.

8. The device for detecting shrinkage and deformation of concrete according to claim 7, characterized in that: The reflective element is placed on the covering element.

9. The device for detecting shrinkage and deformation of concrete according to claim 1, characterized in that: The detection member is connected to an external detection device to analyze the shrinkage value of the concrete to be detected through the data obtained by the detection member.

10. The device for detecting shrinkage and deformation of concrete according to claim 7, characterized in that: The test cavity is a through cavity, the concrete test mold is placed on the test position so that the test position covers one end of the concrete test mold, and the cover is arranged at the other end of the concrete test mold away from the test position.

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