Automatic testing device for expansion and shrinkage rate of concrete
By designing the drive components and sliders, the problems of laborious single-person operation and specimen length adaptability were solved, enabling efficient detection of concrete expansion and shrinkage rate and debris removal.
Patent Information
- Application Number
- CN202520277694.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing concrete expansion and shrinkage rate testing devices are laborious to operate by a single person, difficult to adapt to specimens of different lengths, and inconvenient to clean up debris.
A drive component is used to drive the slider to slide, which in turn moves the clamping plate. A dial indicator is used to detect the expansion and contraction rate. The slider position is adjusted to accommodate different specimen lengths. A rotating plate is designed to facilitate the cleaning of debris.
It enables convenient single-person operation, adapts to testing of different specimen lengths, and facilitates the cleaning of debris after testing, thus improving operational efficiency.
Smart Images
Figure CN223692376U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of concrete detection devices, in particular to a concrete expansion and shrinkage rate automatic testing device. BACKGROUND
[0002] In the underground parking lot engineering, the intermittent expansion reinforcement band is used for sectional construction, which can solve the problem of concrete shrinkage cracks caused by long structure, avoid incomplete cleaning of construction joints or rust of steel bars due to long time of post-pouring band, ensure the engineering quality, easily organize the flow construction and shorten the construction period. During the construction process of the intermittent expansion reinforcement band, the structure will not crack when the expansion rate of the concrete is greater than the shrinkage rate. In order to determine whether the expansion rate of the concrete is greater than the shrinkage rate, the expansion and shrinkage rate of the concrete needs to be detected.
[0003] At present, the expansion and shrinkage rate detection device of the concrete generally comprises a workbench, a fixed plate fixed on the workbench, a clamping plate capable of sliding on the workbench, and a spring for limiting the sliding of the clamping plate. When in use, the concrete test piece is placed on the workbench and located between the clamping plate and the fixed plate. After the test piece is placed between the clamping plate and the fixed plate, the spring is compressed. Once the test piece shrinks or expands, the expansion and shrinkage of the test piece can be judged by detecting the position change of the clamping plate, so that the expansion and shrinkage rate of the concrete test piece can be measured.
[0004] For the above related technology, the inventor believes that when placing the test piece, the clamping plate needs to be pulled to overcome the deformation of the spring, so that the test piece can be placed between the clamping plate and the fixed plate. When a single person operates, one hand needs to pull the clamping plate and the other hand needs to place the test piece. Whether it is to pull the clamping plate to overcome the deformation of the spring or to place the test piece with one hand, it is more laborious, and therefore it is not convenient for a single person to operate. CONTENT OF THE UTILITY MODEL
[0005] In order to facilitate a single person to detect the expansion and shrinkage rate of the concrete, the present application provides a concrete expansion and shrinkage rate automatic testing device.
[0006] The present application provides a concrete expansion and shrinkage rate automatic testing device, which adopts the following technical scheme:
[0007] A concrete expansion and shrinkage rate automatic testing device, comprising a workbench, a fixed plate fixed on the workbench, a clamping plate capable of sliding on the workbench in the direction of approaching or moving away from the fixed plate, a spring and a micrometer for detecting the sliding distance of the clamping plate, a sliding block is slidably connected on the workbench in the direction of approaching or moving away from the fixed plate, and a driving assembly for driving the sliding block to slide is arranged on the workbench; the clamping plate is slidably connected on the sliding block in the direction of approaching or moving away from the fixed plate, and the spring is used for limiting the sliding of the clamping plate.
[0008] By adopting the technical scheme, when in use, the position of the sliding block can be adjusted according to the length of the test piece, then the test piece is placed between the clamping plate and the fixed plate, then the sliding block is driven to slide by the driving assembly, the clamping plate is driven to move, until the clamping plate abuts against the test piece, and the spring is deformed to a certain extent, then the detection rod of the micrometer is abutted against the clamping plate; when the test piece expands or shrinks, the clamping plate is pushed to move, so that the moving distance of the clamping plate can be detected by the micrometer, and then the expansion and shrinkage rate of the test piece is judged; the position of the sliding block is adjusted, so that the test piece can be placed between the clamping plate and the fixed plate by one person, one-person operation is facilitated, and in addition, the test piece of different lengths can be adapted to a large extent by adjusting the position of the sliding block.
[0009] Optionally, the driving assembly comprises a lead screw and a handle, the lead screw is rotationally connected to the workbench, and the lead screw is rotated to drive the sliding block to slide; the handle is used to drive the lead screw to rotate.
[0010] By adopting the technical scheme, when the sliding block is driven to slide, the handle is rotated to drive the lead screw to rotate, so as to drive the sliding block to slide; the driving assembly has a simple structure and is convenient to operate.
[0011] Optionally, the sliding block is fixedly connected with a mounting sleeve, the detection rod of the micrometer is used to pass through the mounting sleeve to abut against the clamping plate, and the mounting sleeve is provided with a positioning piece used to position the position of the micrometer.
[0012] By adopting the technical scheme, the position of the micrometer can be adjusted to adapt to test pieces of different lengths.
[0013] Optionally, the positioning piece comprises a locking screw, and the locking screw is used to be screwed through the mounting sleeve to abut against the outer wall of the detection rod of the micrometer.
[0014] By adopting the technical scheme, the locking screw is rotated to abut against or move away from the detection rod of the micrometer, so that the micrometer can be positioned or moved
[0015] Optionally, the upper surface of the workbench is provided with a recess, the recess is provided with a rotating plate, the upper surface of the rotating plate is flush with the upper surface of the workbench when the rotating plate is completely located in the recess, and the rotating plate is provided with a notch for the sliding block to slide; the rotating plate is rotationally connected in the recess, the rotating axis of the rotating plate is arranged along the sliding direction of the sliding block, and the workbench is provided with a driving piece used to drive the rotating plate to rotate.
[0016] By adopting the technical scheme, on one hand, the test piece is prone to falling into debris during the detection process, and the debris can be conveniently cleaned away after the detection is completed by rotating the rotating plate; on the other hand, the device is convenient to take away the concrete test piece when the device is applied to other concrete detection equipment.
[0017] Optionally, the rotating plate is slidably connected with a moving block, and the driving member comprises a pneumatic cylinder, a fixed end of the pneumatic cylinder being fixedly connected to the workbench, and a telescopic end of the pneumatic cylinder being hingedly connected to the moving block.
[0018] By adopting the technical scheme, the pneumatic cylinder is opened to drive the rotating plate to rotate; the driving member has a simple structure and is convenient to operate.
[0019] In summary, the present application has the following beneficial technical effects:
[0020] 1. The present application adjusts the position of the sliding block, so that a single person can place the test piece between the clamping plate and the fixed plate, facilitating single-person operation, and the position of the sliding block can be adjusted to adapt to test pieces of different lengths to a large extent.
[0021] 2. The present application is designed to be capable of being turned over by the rotating plate, so that the debris can be conveniently cleaned away after the detection of the test piece is completed. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a whole structure schematic diagram of a concrete expansion and shrinkage rate automatic testing device disclosed by the present application Figure 1 .
[0023] Figure 2 is a sectional view of Figure 1 .
[0024] Figure 3 is a whole structure schematic diagram of a concrete expansion and shrinkage rate automatic testing device disclosed by the present application Figure 2 .
[0025] MARKS OF THE DRAWINGS:
[0026] 1, workbench; 2, fixed plate; 3, clamping plate; 4, spring; 5, micrometer; 6, sliding block; 7, sliding groove; 8, handle; 9, lead screw; 10, mounting plate; 11, guide rod; 12, mounting sleeve; 13, locking screw; 14, clearance groove; 15, rotating plate; 16, notch; 17, moving block; 18, mounting groove; 19, pneumatic cylinder; 20, moving groove; 21, debris discharge groove. DETAILED DESCRIPTION
[0027] The present application will be further described below in combination with the accompanying drawings. Figures 1-3
[0028] The application discloses an automatic testing device for concrete expansion and shrinkage.
[0029] Referring to Figure 1 and Figure 2 An automatic testing device for concrete expansion and shrinkage comprises a workbench 1, a fixed plate 2, a clamping plate 3, a spring 4 and a micrometer 5; the fixed plate 2 is fixedly connected to the upper surface of one end of the workbench 1 in the length direction.
[0030] A sliding block 6 is slidably connected to the workbench 1 in the direction of approaching or moving away from the fixed plate 2; the workbench 1 is provided with a driving assembly for driving the sliding block 6 to slide; the clamping plate 3 is slidably connected to the sliding block 6 in the direction of approaching or moving away from the fixed plate 2.
[0031] The driving assembly comprises a handle 8 and a lead screw 9; the workbench 1 is provided with a sliding groove 7 for the sliding block 6 to slide; the lead screw 9 is rotatably connected in the sliding groove 7; the rotating axis and the length direction of the lead screw 9 are both arranged along the sliding direction of the sliding block 6; the lead screw 9 is threaded through the sliding block 6; one end of the lead screw 9 penetrates through the workbench 1 and is fixedly connected with the handle 8.
[0032] In another embodiment, the driving assembly can also adopt a hydraulic cylinder to drive the sliding block 6 to slide.
[0033] In the embodiment, the sliding block 6 is fixedly connected with a mounting plate 10; the clamping plate 3 is fixedly connected with a guide rod 11; the length direction of the guide rod 11 is arranged along the sliding direction of the sliding block 6; one end of the guide rod 11, which is away from the clamping plate 3, penetrates through the mounting plate 10; the spring 4 is sleeved on the part of the guide rod between the clamping plate 3 and the mounting plate 10; the two ends of the spring 4 are fixedly connected with the clamping plate 3 and the mounting plate 10 respectively.
[0034] The mounting plate 10 is fixedly connected with a mounting sleeve 12; the detection rod of the micrometer 5 is used for penetrating through the mounting sleeve 12 and abutting against the clamping plate 3; the mounting sleeve 12 is provided with a positioning member for positioning the position of the micrometer 5.
[0035] The positioning member comprises a locking screw 13; the locking screw 13 is used for being screwed through the mounting sleeve 12 and abutting against the outer wall of the detection rod of the micrometer 5.
[0036] Referring to Figure 1 and Figure 3 The upper surface of the workbench 1 is provided with a clearance groove 14; the clearance groove 14 is provided with a rotating plate 15; when the rotating plate 15 is completely located in the clearance groove 14, the upper surface of the rotating plate 15 is flush with the upper surface of the workbench 1; the rotating plate 15 is provided with a notch 16 for the sliding block 6 to slide; one end of the rotating plate 15, which is close to the length direction of the workbench 1, is rotatably connected in the clearance groove 14; the rotating axis of the rotating plate 15 is arranged along the sliding direction of the sliding block 6; the workbench 1 is provided with a driving member for driving the rotating plate 15 to rotate.
[0037] The moving block 17 is slidably connected to one side of the rotating plate 15 close to the bottom surface of the accommodation slot 14, and a moving slot 20 is formed in the rotating plate 15 for the movement of the moving block 17, the sliding direction of the moving block 17 is arranged along the width direction of the workbench 1, and a mounting slot 18 is formed in one side of the workbench 1 below the accommodation slot 14, the driving member comprises a cylinder 19, the fixed end of the cylinder 19 is fixedly connected in the mounting slot 18, and the telescopic end of the cylinder 19 is hingedly connected to the moving block 17.
[0038] In another embodiment, the driving member can also adopt a motor, that is, the rotating plate 15 is driven to rotate by the motor.
[0039] In the embodiment, the workbench 1 is provided with a slag discharge slot 21 below the sliding slot 7, the slag discharge slot 21 is communicated with the sliding slot 7, the bottom surface of the slag discharge slot 21 is inclined, and the slag discharge slot 21 penetrates through the workbench 1 on one side, so as to facilitate the slag discharge.
[0040] The implementation principle of the concrete expansion and shrinkage rate automatic testing device is as follows: during use, the position of the sliding block 6 is adjusted through the screw rod 9 and the handle 8, and then the position of the clamping plate 3 is adjusted, then the test piece is placed between the clamping plate 3 and the fixed plate 2, then the sliding block 6 is driven to slide through the driving assembly, the clamping plate 3 is driven to move, until the clamping plate 3 abuts against the test piece, and the spring 4 is deformed to a certain degree, then the detection rod of the micrometer 5 abuts against the clamping plate 3; when the test piece expands or shrinks, the clamping plate 3 is pushed to move, so that the movement distance of the clamping plate 3 can be detected through the micrometer 5, and then the expansion and shrinkage rate of the test piece is judged.
[0041] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An automatic testing device for the expansion and shrinkage rate of concrete, comprising a workbench (1), a fixing plate (2) fixed on the workbench (1), a clamping plate (3) capable of sliding on the workbench (1) in a direction close to or away from the fixing plate (2), a spring (4), and a dial indicator (5) for detecting the sliding distance of the clamping plate (3), characterized in that: The workbench (1) is slidably connected with a sliding block (6) along the direction of approaching or moving away from the fixed plate (2), and the workbench (1) is provided with a driving assembly for driving the sliding block (6) to slide; the clamping plate (3) is slidably connected on the sliding block (6) along the direction of approaching or moving away from the fixed plate (2), and the spring (4) is used to limit the sliding of the clamping plate (3).
2. The automatic testing device for concrete expansion and shrinkage according to claim 1, characterized in that: The driving assembly comprises a lead screw (9) and a handle (8), the lead screw (9) is rotatably connected on the workbench (1), and the lead screw (9) is rotated to drive the sliding block (6) to slide, and the handle (8) is used to drive the lead screw (9) to rotate.
3. The automatic concrete expansion and contraction rate testing device according to claim 1, characterized in that: The sliding block (6) is fixedly connected with a mounting sleeve (12), the detection rod of the micrometer (5) is used to pass through the mounting sleeve (12) to abut against the clamping plate (3), and the mounting sleeve (12) is provided with a positioning member for positioning the position of the micrometer (5).
4. The automatic concrete expansion and contraction rate testing device according to claim 3, characterized in that: The positioning member comprises a locking screw (13), and the locking screw (13) is used to threadedly pass through the mounting sleeve (12) and abut against the outer wall of the detection rod of the micrometer (5).
5. The automatic concrete expansion and contraction testing device of claim 1, wherein: The upper surface of the workbench (1) is provided with a clearance groove (14), the clearance groove (14) is provided with a rotating plate (15), when the rotating plate (15) is completely located in the clearance groove (14), the upper surface of the rotating plate (15) is flush with the upper surface of the workbench (1); the rotating plate (15) is provided with a notch (16) for the sliding block (6) to slide; the rotating plate (15) is rotatably connected in the clearance groove (14), the rotating axis of the rotating plate (15) is arranged along the sliding direction of the sliding block (6), and the workbench (1) is provided with a driving member for driving the rotating plate (15) to rotate.
6. The automatic concrete expansion and contraction rate testing device according to claim 5, characterized in that: The rotating plate (15) is slidably connected with a moving block (17), and the driving member comprises a pneumatic cylinder (19), the fixed end of the pneumatic cylinder (19) is fixedly connected on the workbench (1), and the telescopic end of the pneumatic cylinder (19) is hinged with the moving block (17).