Concrete shrinkage test device
By designing a ring-shaped support and clamping plate structure, the problem of concrete deformation caused by the clamping method was solved, ensuring that the dial indicator is in perpendicular contact with the concrete and improving the accuracy of the concrete shrinkage test.
Patent Information
- Application Number
- CN202423030078.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In existing technologies, when aligning block concrete using clamping methods, it is easy to cause concrete deformation, which leads to inaccurate micrometer measurement positions and affects the accuracy of test results.
A concrete shrinkage test device was designed, which adopts a structure of ring support, arc-shaped clamp, conical clamp and threaded connection. The clamp is in close contact with the side wall of the concrete to ensure that the dial indicator is in perpendicular contact with the surface to be tested, thus avoiding concrete deformation.
This effectively avoids measurement errors caused by concrete deformation, ensures that the dial indicator is in perpendicular contact with the concrete surface to be tested, and improves the accuracy of the test results.
Smart Images
Figure CN223551727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete testing technology, specifically a concrete shrinkage testing device. Background Technology
[0002] When concrete encounters changes in the natural environment, it will expand and shrink. Both expansion and shrinkage of concrete can cause cracks in the wall and affect the indicators for evaluating the durability of concrete. After the concrete is produced, it is necessary to conduct a concrete shrinkage test to test the volume reduction caused by the loss of internal moisture due to drying, chemical reactions and temperature changes during the setting, hardening and use of concrete, thereby evaluating the shrinkage resistance of concrete.
[0003] When conducting shrinkage tests on concrete, the concrete block needs to be placed on the test platform. During placement, the concrete block needs to be moved to ensure it is properly aligned, guaranteeing that the end of the dial indicator is in perpendicular contact with the concrete surface to be measured. Existing technologies typically use clamping devices for alignment to prevent the concrete from tilting and causing significant errors in the test results. However, clamping can easily cause deformation of the concrete block, resulting in the dial indicator contacting the deformed area during measurement, leading to inaccurate initial test values. Therefore, those skilled in the art have provided a concrete shrinkage testing device to address the problems mentioned in the background art. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a concrete shrinkage testing device to solve the problem that clamping can easily cause blocky concrete to deform, resulting in the dial indicator contacting the deformed part of the concrete during measurement, thus leading to inaccurate initial test values.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a concrete shrinkage testing device, comprising a base, an annular support on the base, a first arc-shaped locking block slidably engaged on the annular support, a second arc-shaped locking block on one side of the first arc-shaped locking block, an L-shaped support mounted on the first arc-shaped locking block, a first conical chuck mounted at the bottom of the L-shaped support, a second conical chuck mounted on one side of the L-shaped support, a first dial indicator inserted into the first conical chuck, a second dial indicator inserted into the second conical chuck, limit rods mounted on the front and rear sides of the L-shaped support, a positioning block mounted on the upper end of the second arc-shaped locking block, a bidirectional screw rotatably engaged within the positioning block, and a clamping plate threaded onto the bidirectional screw.
[0008] Preferably, a fixing frame is installed on the upper side of the base, and the annular bracket is fixedly installed to the base through the fixing frame.
[0009] Preferably, the bidirectional screw and the limiting rod are arranged parallel to each other, and the end of the clamping plate away from the bidirectional screw is slidably sleeved with the limiting rod. Rotating the bidirectional screw causes one of the two clamping plates to contact the side of the concrete. When a gap appears in the contact between the clamping plate and the side of the concrete, the position of the clamping plate can be adjusted by rotating the first arc-shaped slider or the second arc-shaped slider, so that the clamping plate is in close contact with the outer wall of one side of the concrete, thereby ensuring that the second dial indicator is in perpendicular contact with the concrete surface to be measured.
[0010] Preferably, the second arc-shaped locking block is slidably engaged with the annular bracket.
[0011] Preferably, a bolt is threaded onto one side of the first arc-shaped locking block. The bolt penetrates the first arc-shaped locking block and presses against the outer wall of the annular bracket, thereby fixing the second arc-shaped locking block and achieving the effect of positioning the L-shaped bracket.
[0012] Preferably, the first dial indicator is slidably inserted into the first conical chuck and the L-shaped bracket, and the second dial indicator is slidably inserted into the second conical chuck and the L-shaped bracket. The outer thread of the first conical chuck is fitted with a first nut, and the outer thread of the second conical chuck is fitted with a second nut. Tightening the nuts causes the nuts to press against the inclined outer wall of the corresponding conical chuck, thereby achieving the effect of clamping and fixing the dial indicator.
[0013] (III) Beneficial Effects
[0014] Compared with the prior art, this utility model provides a concrete shrinkage testing device, which has the following beneficial effects:
[0015] By designing a system where, when the concrete block to be tested is placed on the base, rotating the bidirectional screw causes one of the two clamping plates to contact the side of the concrete. If a gap appears in the contact between the clamping plate and the side of the concrete, the first or second arc-shaped slider can be rotated to adjust the position of the clamping plate, thereby ensuring that the clamping plate is in close contact with one side of the outer wall of the concrete. This ensures that the second dial indicator is in perpendicular contact with the surface of the concrete to be measured. In this structure, the method of using clamping plates to fit the concrete avoids the problem of deformation of the concrete and solves the problem of inaccurate vertical measurement of the dial indicator caused by concrete deformation. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural schematic diagram of a concrete shrinkage testing device provided in an embodiment of this application.
[0017] Figure 2This is a structural schematic diagram of a concrete shrinkage testing device provided in an embodiment of this application.
[0018] Figure 3 This is a structural schematic diagram of a concrete shrinkage testing device provided in an embodiment of this application.
[0019] In the diagram: 1. Base; 2. Fixing frame; 3. Ring bracket; 4. First arc-shaped locking block; 5. L-shaped bracket; 6. First conical chuck; 7. First nut; 8. Second conical chuck; 9. Second nut; 10. Bolt; 11. Second arc-shaped locking block; 12. Positioning block; 13. Bidirectional screw; 14. Clamping plate; 15. Limiting rod; 16. First dial indicator; 17. Second dial indicator. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] This utility model provides a technical solution, a concrete shrinkage testing device. Please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 The system includes a base 1, on which an annular bracket 3 is mounted. A fixing frame 2 is installed on the upper side of the base 1. The annular bracket 3 is fixedly installed to the base 1 via the fixing frame 2. A first arc-shaped locking block 4 is slidably engaged on the annular bracket 3. A second arc-shaped locking block 11 is provided on one side of the first arc-shaped locking block 4. An L-shaped bracket 5 is mounted on the first arc-shaped locking block 4. A first conical chuck 6 is mounted on the bottom end of the L-shaped bracket 5. A second conical chuck 8 is mounted on one side of the L-shaped bracket 5. A first micrometer 16 is inserted into the first conical chuck 6. A second micrometer 17 is inserted into the second conical chuck 8. Limiting rods 15 are installed on the front and rear sides of the L-shaped bracket 5. A positioning block 12 is installed on the upper end of the second arc-shaped locking block 11. A bidirectional screw 13 is rotatably engaged in the positioning block 12. A clamping plate 14 is threaded onto the bidirectional screw 13.
[0022] Please see Figure 1 , Figure 2 , Figure 3The second arc-shaped locking block 11 is slidably engaged with the annular bracket 3. A bolt 10 is threadedly connected to one side of the first arc-shaped locking block 4. The bolt 10 presses against the outer wall of the first arc-shaped locking block 4 and the annular bracket 3, fixing the second arc-shaped locking block 11 through the bolt 10, thereby achieving the effect of positioning the L-shaped bracket 5. The first dial indicator 16 is slidably inserted into the L-shaped bracket 5 through the first conical chuck 6, and the second dial indicator 17 is slidably inserted into the L-shaped bracket 5 through the second conical chuck 8. A first nut 7 is threaded onto the outer side of the first conical chuck 6, and a second nut 9 is threaded onto the outer side of the second conical chuck 8. The movable nut presses against the inclined outer wall of the corresponding conical chuck, thereby achieving the effect of clamping and fixing the dial indicator. The bidirectional screw 13 is arranged parallel to the limiting rod 15. The end of the clamping plate 14 away from the bidirectional screw 13 is slidably sleeved with the limiting rod 15. Rotating the bidirectional screw 13 makes one of the two clamping plates 14 contact the side of the concrete. When a gap appears in the contact between the clamping plate 14 and the side of the concrete, the first arc-shaped slider or the second arc-shaped slider can be rotated to adjust the position of the clamping plate 14, so that the clamping plate 14 is in close contact with the outer wall of one side of the concrete, thereby ensuring that the second dial indicator 17 is in perpendicular contact with the concrete surface to be measured.
[0023] In this utility model, a ring-shaped bracket 3 is mounted on the base 1 via a fixing frame 2. A first arc-shaped locking block 4 and a second arc-shaped locking block 11 are engaged with the ring-shaped bracket 3. A bolt 10 is threaded onto one side of the first arc-shaped locking block 4, and the end of the bolt 10 is in abutting contact with the ring-shaped bracket 3. An L-shaped bracket 5 is mounted on the upper side of the first arc-shaped locking block 4. A second conical chuck 8 is mounted on one side of the L-shaped bracket 5, and a second micrometer 17 is held through the second conical chuck 8. A first conical chuck 6 is mounted on the upper end of the L-shaped bracket 5, and a first micrometer 16 is held through the first conical chuck 6. A first nut 7 and a second nut 9 are threaded onto the first conical chuck 6 and the second conical chuck 8, respectively. By tightening the nuts, the nuts are pressed against the inclined outer wall of the conical chuck, thereby achieving the effect of clamping and fixing the dial indicator. The first dial indicator 16 and the second dial indicator 17 can be adjusted in position under the limit of the corresponding nuts and conical chucks, so that the depth of the first dial indicator 16 and the second dial indicator 17 can be adjusted and fixed during the test. The first dial indicator 16 is set above the center of the base 1. When the L-shaped support rotates, the first dial indicator 16 will not be displaced.
[0024] A positioning block 12 is installed on the upper side of the second arc-shaped locking block 11, and a bidirectional screw 13 is rotatably engaged inside the positioning block 12. Clamping plates 14 are threaded onto both ends of the bidirectional screw 13. Limiting rods 15 are installed on both ends of the L-shaped bracket 5. The limiting rods 15 are arranged parallel to the bidirectional screw 13. The end of the clamping plate 14 away from the bidirectional screw 13 is slidably engaged with the limiting rod 15. The position of the clamping plate 14 can be adjusted by rotating the bidirectional screw 13.
[0025] When the block of concrete to be tested is placed on the base 1, the double-ended screw 13 is rotated so that one of the two clamping plates 14 contacts the side of the concrete. When a gap appears in the contact between the clamping plate 14 and the side of the concrete, the first or second arc-shaped slider can be rotated to adjust the position of the clamping plate 14 so that the clamping plate 14 is in close contact with the outer wall of one side of the concrete, thereby ensuring that the second dial indicator 17 is in perpendicular contact with the surface of the concrete to be measured. After the clamping plate 14 is in contact with one side of the concrete, the second arc-shaped clamping block 11 is fixed by bolts 10. In this structure, the method of using the clamping plate 14 to be in contact with the concrete can avoid the problem of deformation of the concrete and solve the problem of inaccurate vertical measurement of the dial indicator caused by concrete deformation.
[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0027] In this document, unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A concrete shrinkage testing device, comprising a base (1), characterized in that: The base (1) is provided with an annular bracket (3), and a first arc-shaped locking block (4) is slidably engaged on the annular bracket (3). A second arc-shaped locking block (11) is provided on one side of the first arc-shaped locking block (4). An L-shaped bracket (5) is installed on the first arc-shaped locking block (4). A first conical chuck (6) is installed at the bottom end of the L-shaped bracket (5). A second conical chuck (8) is installed on one side of the L-shaped bracket (5). A first micrometer (16) is inserted into the first conical chuck (6). A second micrometer (17) is inserted into the second conical chuck (8). Limiting rods (15) are installed on the front and rear sides of the L-shaped bracket (5). A positioning block (12) is installed at the upper end of the second arc-shaped locking block (11). A bidirectional screw (13) is rotatably engaged in the positioning block (12). A clamping plate (14) is threaded onto the bidirectional screw (13).
2. The concrete shrinkage testing device according to claim 1, characterized in that: A fixing frame (2) is installed on the upper side of the base (1), and the annular bracket (3) is fixedly installed to the base (1) through the fixing frame (2).
3. The concrete shrinkage testing device according to claim 1, characterized in that: The bidirectional screw (13) is arranged parallel to the limiting rod (15), and the end of the clamp (14) away from the bidirectional screw (13) is slidably sleeved with the limiting rod (15).
4. The concrete shrinkage testing device according to claim 1, characterized in that: The second arc-shaped locking block (11) is slidably engaged with the annular bracket (3).
5. The concrete shrinkage testing device according to claim 1, characterized in that: A bolt (10) is threadedly connected to one side of the first arc-shaped block (4), and the bolt (10) presses against the outer wall of the ring bracket (3) through the first arc-shaped block (4).
6. The concrete shrinkage testing device according to claim 1, characterized in that: The first tapered chuck (6) has a first nut (7) threaded on its outer side, and the second tapered chuck (8) has a second nut (9) threaded on its outer side.
7. The concrete shrinkage testing device according to claim 1, characterized in that: The first micrometer (16) is slidably inserted through the first conical chuck (6) and the L-shaped bracket (5), and the second micrometer (17) is slidably inserted through the second conical chuck (8) and the L-shaped bracket (5).