Hardness testing device for concrete
By designing a concrete hardness testing device with replaceable punch elements and equipped with a hot air blower, the problems of unadjustable impact force and insufficient drying in traditional devices are solved. This enables rapid switching between multiple punches and pre-drying of concrete, improving the flexibility and accuracy of the test.
Patent Information
- Application Number
- CN202520153263.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Traditional concrete hardness testing devices cannot select the appropriate impact force according to different types of concrete, and the lack of a drying function leads to inaccurate test results and extended testing cycles.
A concrete hardness testing device was designed, which uses replaceable punch elements and conversion components, combined with a force sensor and a hot air blower, to achieve rapid replacement of various punches and accurate testing, and is equipped with a hot air blower for pre-drying treatment.
It improves the flexibility and accuracy of testing, shortens the testing cycle, and ensures the authenticity and reliability of test results.
Smart Images
Figure CN223897250U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hardness testing equipment technology, and in particular to a hardness testing device for concrete. Background Technology
[0002] In the construction industry, concrete is one of the most important building materials, and its performance directly affects the quality and safety of buildings. To ensure construction quality, a series of tests are usually conducted on concrete at the construction site, among which hardness testing is a key indicator. Hardness testing can assess the strength and durability of concrete, allowing for timely adjustments to construction techniques and ensuring project quality. However, traditional hardness testing methods have some shortcomings, limiting their application scope and technical capabilities. Currently, common concrete hardness testing devices on the market mainly use fixed punches for downward pressure testing. While this testing method is simple to operate, it has significant limitations in practical applications. First, because the punch is fixed, it is impossible to select the appropriate impact force for different types of concrete, leading to inaccurate test results. Second, these devices usually lack drying functions, while concrete samples require a long time to dry naturally during preparation. This not only prolongs the testing cycle but may also lead to distorted test data due to insufficient drying. Utility Model Content
[0003] To overcome the above-mentioned technical problems, this application provides a hardness testing device for concrete.
[0004] This application provides a concrete hardness testing device, which adopts the following technical solution:
[0005] A concrete hardness testing device includes a housing, within which a testing mechanism is disposed. The testing mechanism includes a hydraulic cylinder and a conversion assembly. A downward pressure column is fixedly disposed at the output end of the hydraulic cylinder. The conversion assembly includes a rotating wheel, with a hexagonal spline shaft fixedly connected to the bottom of the rotating wheel. A punch plate is fixedly disposed at the end of the hexagonal spline shaft away from the rotating wheel. The punch plate is disc-shaped and has six slots forming mounting grooves. Punch elements are disposed within the mounting grooves. A spline fixing cylinder is fixedly disposed at the top of the housing, and a hexagonal through hole forming a keyway is formed in the middle of the spline fixing cylinder. A key shaft is inserted into the keyhole. A locking portion is provided at one end of the hexagonal spline shaft near the rotating wheel, and a shaft portion is provided at the other end of the hexagonal spline shaft away from the rotating wheel. The cross-section of the shaft portion is circular, and the cross-section of the locking portion is hexagonal. The size of the locking portion matches the keyhole. A through hole is provided at the bottom of the mounting groove to form an ejection hole. The diameter of the ejection hole is set to be smaller than the diameter of the mounting groove. A return spring is also provided in the mounting groove. The return spring is sleeved on the punch element. A circular plate is fixedly provided on the top of the punch element to form an abutment plate. The top of the return spring abuts against the bottom of the abutment plate.
[0006] By adopting the above technical solution, this concrete hardness testing device enables the rapid replacement and installation of various punch components, improving testing flexibility and accuracy. The hexagonal spline shaft design allows the conversion assembly to easily rotate punch components from different positions to the working position, ensuring that the appropriate punch type can be selected for each test. Furthermore, the return spring automatically restores the punch components to their initial position after testing, avoiding the tedious manual adjustment and further improving testing efficiency.
[0007] Preferably, the shape of the pressing top column matches the shape of the mounting groove, and a sliding shell is slidably sleeved on one end of the pressing top column near the mounting groove, with a force sensor disposed inside the sliding shell.
[0008] By adopting the above technical solution, a precise fit between the downward pressure column and the mounting slot is achieved, ensuring that the punch element can be accurately inserted into the corresponding mounting slot, thus improving the accuracy of the test. Simultaneously, the force sensor installed inside the sliding housing can monitor changes in the downward pressure in real time, making the test results more reliable and avoiding measurement errors caused by uneven force.
[0009] Preferably, the housing is further provided with a flipping assembly, which includes a snap-fit seat disposed below the punch plate. The snap-fit seat has a through groove vertically opened in the middle to form a penetration groove, and two grooves are opened opposite each other in the direction of the penetration groove to form a fixing rotation groove.
[0010] By adopting the above technical solution, the fixed rotating groove is used to clamp the two ends of the concrete brick, while the punching groove allows the middle part of the concrete brick to be suspended. When the punch element presses down on the concrete brick, the stress of the concrete brick can be concentrated in its middle. The bottom is not supported and can only rely on the concrete brick to support the punch element, thereby enabling the optimal hardness data of the concrete brick to be tested.
[0011] Preferably, the two ends of the snap-fit seat are fixedly provided with rotating shafts, and two support blocks are fixedly provided inside the housing corresponding to the positions of the rotating shafts. The tops of the two support blocks are recessed with support grooves, and the rotating shafts are rotatably disposed within the support grooves, with one end of the rotating shafts extending outside the housing. By adopting the above technical solution, the support blocks can support the snap-fit seat, further improving the load-bearing capacity of the snap-fit seat. Simultaneously, the support grooves on the tops of the support blocks allow the snap-fit seat to rotate relative to the support grooves, thereby realizing the rotation function of the snap-fit seat.
[0012] Preferably, two sliding plates are oppositely arranged on the outside of the housing corresponding to the position of the rotating shaft. The sliding plates have sliding grooves, and a limit locking plate is slidably arranged in the sliding grooves. The lower end of the limit locking plate has a U-shaped groove to form a locking groove. A handle is also fixedly arranged on the limit locking plate. The end of the rotating shaft near the locking groove has two flat cut surfaces opposite to each other to form a locking surface.
[0013] By adopting the above technical solution, the limit locking plate can easily lock or unlock the rotating shaft, ensuring the stability and reliability of the flipping assembly under different working conditions. When it is necessary to adjust the flipping angle, the operator can easily move the limit locking plate with the handle to disengage it from the locking surface on the rotating shaft, allowing the rotating shaft to rotate freely. When it is necessary to fix the flipping position, simply push the limit locking plate back into the slide groove so that the locking groove is aligned with the locking surface, thereby effectively preventing the rotating shaft from rotating accidentally and improving the safety and accuracy of the testing process.
[0014] Preferably, a hot air blower is provided at the bottom of the card holder.
[0015] By adopting the above technical solution, this concrete hardness testing device can effectively improve testing efficiency and accuracy. The hot air blower allows for pre-drying of concrete blocks before they are placed at the testing position, accelerating moisture evaporation, reducing waiting time, and ensuring that hardness testing is conducted under optimal conditions, thereby enhancing the authenticity and reliability of the test results.
[0016] Preferably, a digital display controller is fixedly mounted on the top of the housing.
[0017] By adopting the above technical solution, the digital display controller fixedly installed on the top of the shell can display the data collected by the force sensor in real time during the test, which makes it convenient for operators to intuitively understand the changes in concrete hardness and improve test accuracy and efficiency.
[0018] Preferably, the side of the housing is provided with a flip cover.
[0019] By adopting the above technical solution, a flip cover is provided on the side of the shell, which makes it convenient for operators to fill bricks.
[0020] In summary, this application includes at least one of the following beneficial technical effects:
[0021] 1. By setting up replaceable punch elements and corresponding conversion components, it is possible to quickly switch between punches of various shapes and sizes, which improves the testing flexibility and applicability, and solves the problem that existing hardness testing devices can only use fixed punches and have single test results.
[0022] 2. By installing a hot air blower, the concrete bricks can be pre-dried before testing, which shortens the waiting time and ensures that the concrete bricks are tested in a completely dry state, thus improving the authenticity and accuracy of the test results. Attached Figure Description
[0023] Figure 1 This is a perspective view of an embodiment of this application;
[0024] Figure 2 This is a front view of an embodiment of this application;
[0025] Figure 3 and Figure 4 This is a schematic diagram of the specific structure of the testing facility;
[0026] Figure 5 It is a cross-sectional view of the specific structure of the conversion component;
[0027] Figure 6 This is a cross-sectional view of the specific structure of the downward-pressing top column.
[0028] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Flip cover; 21. Rotary wheel; 22. Hexagonal spline shaft; 23. Shaft part; 24. Locking shaft part; 25. Spline fixing cylinder; 251. Key hole; 26. Punch plate; 261. Mounting groove; 262. Ejection hole; 263. Return spring; 264. Punch element; 265. Abutment plate; 3. Hydraulic cylinder; 31. Downward pressing column; 32. Force sensor; 33. Sliding shell; 4. Snap-fit seat; 41. Fixed rotating groove; 42. Puncture groove; 5. Rotary shaft; 51. Locking surface; 52. Support block; 53. Support groove; 6. Sliding plate; 7. Limit locking plate; 71. Locking groove; 711. Handle; 12. Digital display controller; 13. Hot air blower. Detailed Implementation
[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0030] This application discloses a concrete hardness testing device, referring to... Figure 1 and Figure 2 The device includes a housing 1, a digital display controller 12 fixedly mounted on the top of the housing 1, and a flip cover 11 on the side of the housing 1. The flip cover 11 is fixed to the housing 1 by a hinge, and the interior of the housing 1 can be exposed by lifting the hinge. (See reference...) Figure 3 and Figure 4 The housing 1 is equipped with a testing mechanism, which includes a hydraulic cylinder 3 and a conversion component. The output end of the hydraulic cylinder 3 is fixedly equipped with a downward pressing column 31, which is driven by the hydraulic cylinder 3.
[0031] Reference Figure 3 and Figure 4The conversion assembly includes a rotating wheel 21, with a hexagonal spline shaft 22 fixedly connected to the bottom of the rotating wheel 21. A punch disk 26 is fixedly installed at the end of the hexagonal spline shaft 22 away from the rotating wheel 21. Rotating the rotating wheel 21 will drive the punch disk 26 to rotate synchronously. The punch disk 26 is designed in a disc shape, which makes it easier to rotate. The punch disk 26 has 6 slots forming mounting slots 261. The 6 mounting slots 261 are evenly spaced, and punch elements 264 are installed in the mounting slots 261. The shape and hardness parameters of the punch elements 264 are customized according to actual needs. The 6 mounting slots 261 provide more options and make it easier for operators to replace them according to their needs. To facilitate the switching of the punch element 264, a spline fixing cylinder 25 is fixedly installed on the top of the housing 1. A hexagonal through hole is formed in the middle of the spline fixing cylinder 25, creating a keyhole 251. The shape of the keyhole 251 is set according to the size of the hexagonal spline shaft 22, which is inserted into the keyhole 251. A locking shaft portion 24 is provided at the end of the hexagonal spline shaft 22 near the rotating wheel 21, and a shaft portion 23 is provided at the end of the hexagonal spline shaft 22 away from the rotating wheel 21. The cross-section of the shaft portion 23 is circular, and the cross-section of the locking shaft portion 24 is hexagonal. The size of the locking shaft portion 24 matches the keyhole 251. Specifically, the locking shaft portion 24 directly engages with the keyhole 251, and the locking shaft portion 24 and... The hexagonal design of the keyhole 251 allows the locking shaft part 24 to lock when inserted into the keyhole 251, which helps the rotation of the hexagonal spline shaft 22. The operator can also lift the rotating wheel 21 upwards, thereby lifting the hexagonal spline shaft 22 upwards and lifting the locking shaft part 24 out of the keyhole 251. The shaft part 23 is then positioned in the keyhole 251, thus invalidating the locking effect between the shaft part 23 and the locking shaft part 24. The shaft part 23 can rotate relative to the keyhole 251, allowing the operator to rotate the rotating wheel 21. The above technical effects enable the punch plate 26 to achieve the functions of rotation and locking, making it easier for the operator to switch between the punch element 264 and the locking punch plate 26, and making the device operate more stably. The bottom of the mounting groove 261 has a through hole forming an ejection hole 262. The diameter of the ejection hole 262 is set to the diameter of the mounting groove 261. A return spring 263 is also provided inside the mounting groove 261. The return spring 263 is sleeved on the punch element 264. A circular plate is fixedly provided on the top of the punch element 264 to form an abutment plate 265. The top of the return spring 263 abuts against the bottom of the abutment plate 265. The above arrangement allows the punch element 264 to be reset under the action of the return spring 263. The abutment plate 265 is used to directly abut against the downward pressing post 31, which protects the punch element 264. The shape of the downward pressing post 31 matches the shape of the mounting groove 261, which facilitates the downward pressing post 31 to push the punch element 264 out of the mounting groove 261. (Refer to...) Figure 5 and Figure 6In order to better control the downward pressure of the pressing column 31, a sliding shell 33 is slidably sleeved at one end of the pressing column 31 near the mounting groove 261. A force sensor 32 is installed inside the sliding shell 33. The force sensor 32 is electrically connected to the CNC display. By setting the force sensor 32, the downward pressure of the pressing column 31 can be detected, thereby facilitating the operator to control the output power of the hydraulic cylinder 3.
[0032] Reference Figure 3 and Figure 4 The housing 1 also includes a flipping assembly, which includes a snap-fit seat 4 located below the punch plate 26. The snap-fit seat 4 has a vertically oriented through-slot forming a penetration groove 42 in its center. Two opposing grooves on the snap-fit seat 4, facing the penetration groove 42, form a fixing rotating groove 41 for mounting the object to be tested. Rotating shafts 5 are fixedly mounted at both ends of the snap-fit seat 4. Two support blocks 52 are fixedly mounted inside the housing 1 at positions corresponding to the rotating shafts 5. Support grooves 53 are recessed at the top of the two support blocks 52. The rotating shafts 5 are rotatably mounted within the support grooves 53. The support blocks 52 support the rotating shafts 5, allowing them to rotate more smoothly. One end of the rotating shaft 5 extends outside the housing 1. Two sliding plates 6 are oppositely arranged on the outside of the housing 1 corresponding to the position of the rotating shaft 5. The sliding plates 6 have sliding grooves. A limit locking plate 7 is slidably arranged in the sliding groove. A U-shaped groove is formed at the lower end of the limit locking plate to form a locking groove 71. A handle 711 is also fixedly arranged on the limit locking plate 7. Two flat surfaces are oppositely arranged at the end of the rotating shaft 5 near the locking groove 71 to form a locking surface 51. The opening of the locking surface 51 makes the two opposite surfaces of the rotating shaft 5 form a plane. The U-shape of the plane in the locking groove 71 can achieve the technical effect of locking.
[0033] Reference Figure 2 A hot air blower 13 is provided at the bottom of the card slot 4. The hot air blower 13 is electrically connected to the digital display controller 12, and the hot air blower 13 can be controlled by the digital display controller 12.
[0034] The implementation principle of this embodiment is as follows: A concrete brick is placed into the housing 1 by opening the flip cover 11, and the object to be tested is secured in the fixed rotating groove 41. The flip cover 11 is then closed. The hot air blower 13 is started by controlling the digital display controller 12 to accelerate the solidification of the concrete brick. Pushing the limit locking plate 7 upwards with the handle 711 rotates the rotating wheel 21, allowing the hot air blower 13 to dry the other side of the concrete brick. After the concrete brick is dried, the hydraulic cylinder 3 is activated, and the downward-pressing column 31 drives the punch assembly to perform a hardness test on the concrete brick according to a predetermined downward pressure. If it is necessary to switch the punch element 264, the punch disk 26 can be rotated by raising the rotating wheel 21.
[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A hardness testing device for concrete, characterized in that: The device includes a housing (1), within which a testing mechanism is provided. The testing mechanism includes a hydraulic cylinder (3) and a conversion assembly. A downward pressure column (31) is fixedly provided at the output end of the hydraulic cylinder (3). The conversion assembly includes a rotating wheel (21). A hexagonal spline shaft (22) is fixedly connected to the bottom of the rotating wheel (21). A punch plate (26) is fixedly provided at the end of the hexagonal spline shaft (22) away from the rotating wheel (21). The punch plate (26) is disc-shaped and has six slots forming a mounting groove (261). A punch element (264) is provided in the mounting groove (261). A spline fixing cylinder (25) is fixedly provided at the top of the housing (1). A hexagonal through hole is provided in the middle of the spline fixing cylinder (25) to form a keyhole (251). The hexagonal spline shaft (22) is inserted into the keyhole (251). A locking shaft portion (24) is provided at one end of the hexagonal spline shaft (22) near the rotating wheel (21), and a shaft portion (23) is provided at the other end of the hexagonal spline shaft (22) away from the rotating wheel (21). The cross-section of the shaft portion (23) is circular, and the cross-section of the locking shaft portion (24) is hexagonal. The size of the locking shaft portion (24) is matched with the keyhole (251). A through hole is provided at the bottom of the mounting groove (261) to form an ejection hole. (262) The diameter of the ejector hole (262) is set to be smaller than the diameter of the mounting groove (261). A reset spring (263) is also provided in the mounting groove (261). The reset spring (263) is sleeved on the punch element (264). A circular plate is fixedly provided on the top of the punch element (264) to form an abutment plate (265). The top of the reset spring (263) abuts against the bottom of the abutment plate (265).
2. The concrete hardness testing device according to claim 1, characterized in that: The shape of the pressing top column (31) is matched with the shape of the mounting groove (261). A sliding shell (33) is slidably sleeved on one end of the pressing top column (31) near the mounting groove (261). A force sensor (32) is provided inside the sliding shell (33).
3. The concrete hardness testing device according to claim 1, characterized in that: The housing (1) is also provided with a flipping assembly, which includes a snap-fit seat (4) located below the punch plate (26). The snap-fit seat (4) has a through groove in the middle to form a penetration groove (42), and two grooves are opened opposite to each other in the direction of the penetration groove (42) to form a fixing rotation groove (41).
4. The concrete hardness testing device according to claim 3, characterized in that: The two ends of the card holder (4) are fixedly provided with rotating shafts (5). Inside the housing (1), two support blocks (52) are fixedly provided at the positions corresponding to the rotating shafts (5). The top of the two support blocks (52) is recessed with support grooves (53). The rotating shaft (5) is rotatably disposed in the support grooves (53). One end of the rotating shaft (5) extends out to the outside of the housing (1).
5. A concrete hardness testing device according to claim 4, characterized in that: Two sliding plates (6) are oppositely arranged on the outside of the housing (1) corresponding to the position of the rotating shaft (5). The sliding plates (6) have sliding grooves, and a limit locking plate (7) is slidably arranged in the sliding grooves. A U-shaped groove is opened at the lower end of the limit locking plate to form a locking groove (71). A handle (711) is also fixedly arranged on the limit locking plate (7). Two flat cut surfaces are oppositely opened at the end of the rotating shaft (5) near the locking groove (71) to form a locking surface (51).
6. A concrete hardness testing device according to claim 3, characterized in that: A hot air blower (13) is provided at the bottom of the card holder (4).
7. The concrete hardness testing device according to claim 1, characterized in that: A digital display controller (12) is fixedly installed on the top of the housing (1).
8. The concrete hardness testing device according to claim 1, characterized in that: The side of the housing (1) is provided with a flip cover (11).