Concrete strength tester
By designing structures such as vertical components and annular rubber pads in the concrete strength tester, the data inaccuracy caused by shaking of the measurement end is solved, the stability and accuracy of the test are improved, and the use and maintenance of the instrument is simplified.
Patent Information
- Application Number
- CN202420817721.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-19
AI Technical Summary
During use, the measurement end of the existing concrete strength tester is prone to shake, reducing the accuracy of the measurement data.
A concrete strength tester including a rebound meter body and a vertical assembly is designed. The vertical assembly consists of a sleeve, a telescopic cylinder, a spring, annular mounting groove, annular block, annular rubber pad, a bolt, annular anti-slip block and a through groove. These components maintain the stability of the rebound meter, reduce shaking, and facilitate replacement and observation of the strike rod.
It enhances the stability of the concrete strength tester in the strength test of concrete walls, reduces the probability of reduced accuracy of measurement data due to uneven stress, and simplifies the replacement of the annular rubber pad and the observation of the impact rod. Improves the accuracy of the test.
Smart Images
Figure CN222280380U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete detection, in particular to a concrete strength tester. Background Art
[0002] Concrete tensile strength refers to the axial tensile strength of concrete, that is, the stress value obtained by dividing the maximum load borne by the cross-sectional area when the concrete specimen breaks after being subjected to tension, expressed as ftk, and the unit is MPa. There are two main methods for testing the axial tensile strength of concrete, one is the direct test method, and the other is the splitting test. Concrete strength tester is a comprehensive instrument for testing concrete strength. It can be used as an ordinary rebound tester and as an ultrasonic rebound comprehensive method tester. It can measure both the rebound value and the sound time and speed. It is suitable for non-destructive testing of the compressive strength of ordinary concrete in various construction projects.
[0003] A new concrete strength tester is disclosed in a Chinese utility model patent with publication number CN215065685U, including a tester, wherein a first shell and a second shell are respectively sleeved on the left and right sides of the outer wall of the tester, the first shell is threadedly connected to the second shell, a moving rod is fixedly connected to the outer wall of the first shell, a handle is installed at the bottom end of the second shell, and a clamping assembly is installed inside the second shell, and the clamping assembly includes a connecting seat, a clamping rod, a hinge and a compression spring.
[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: during use by staff, it is necessary to ensure that the measuring end of the rebound tester is vertical to the measuring surface for detection to improve the accuracy of the measurement data. However, during use of the above-mentioned concrete strength tester, the measuring end is prone to shaking, which reduces the accuracy of the measurement data. Utility Model Content
[0005] In order to solve the above problems, the utility model provides a concrete strength tester.
[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a concrete strength tester, including a rebound tester body and a striking rod arranged at the end of the rebound tester body, the rebound tester body is provided with a vertical component for keeping the rebound tester perpendicular to the test surface, the vertical component includes a sleeve mounted on the rebound tester body, a telescopic cylinder arranged on the rebound tester body and slidingly matched with the sleeve, and a spring arranged in the sleeve, an annular mounting groove is arranged at the intersection between one side of the sleeve close to the measuring end of the striking rod and the inner wall of the sleeve, the telescopic cylinder is arranged in the sleeve and matched with the annular mounting groove, the inner wall of the telescopic cylinder is fitted with the outer wall of the rebound tester body, and the lower end of the spring is fixed to the inner bottom wall of the annular mounting groove.
[0007] By adopting the above technical solution, when the staff needs to measure the wall, the staff needs to place the end of the impact rod close to the wall against the wall, and the staff holds the rebound tester to squeeze the wall. In the process of squeezing the impact rod, the telescopic tube maintains a state of being in contact with the wall under the force of the spring, thereby enhancing the stability of the concrete strength tester in the process of strength testing the concrete wall, and reducing the probability of reduced accuracy of measurement data due to shaking of the impact rod due to uneven force during the squeezing process.
[0008] Furthermore, an annular block is fixed to one end of the telescopic cylinder away from the sleeve, the area of the upper surface of the annular block is larger than the area of the lower surface, the cross-section of the annular block is circular, and the inner diameter of the annular block is equal to the outer diameter of the telescopic cylinder.
[0009] By adopting the above technical solution and setting the annular block, the contact area between the annular block and the wall is increased when the staff squeezes the impact rod against the wall, and the stability of the staff is enhanced when squeezing the impact rod to test the strength of the concrete wall.
[0010] Furthermore, an annular rubber pad is provided on the top surface of the annular block, and the inner diameter of the annular rubber pad is equal to the inner diameter of the annular block.
[0011] By adopting the above technical solution and providing the annular rubber pad, the probability of the annular block being displaced by external force and causing reduced accuracy of measurement data during the process of workers squeezing the impact rod is reduced.
[0012] Furthermore, a bolt which is gap-matched with the annular rubber pad is provided through the annular rubber pad, an anti-sliding block is fixed on the side wall of the annular block, and the end of the bolt is threadedly connected to the top of the annular block.
[0013] By adopting the above technical solution, the setting of the bolts makes it convenient for the staff to disassemble and replace the worn annular rubber pad at a later time, and the setting of the anti-sliding block reduces the probability of slipping and causing installation inconvenience when the staff installs or replaces the annular rubber pad.
[0014] Furthermore, a through slot is provided on the side wall of the telescopic cylinder to facilitate staff to observe the impact rod.
[0015] By adopting the above technical solution and setting the through groove, it is convenient for the staff to observe the use status of the impact rod in real time, so as to avoid the situation where the telescopic tube blocks the impact rod, making it difficult for the staff to find and replace the impact rod in time, which is conducive to the normal use of the concrete strength tester.
[0016] Furthermore, a support block is fixed on the outer wall of the telescopic cylinder at a position close to the sleeve, and a sliding groove is provided in the sleeve, which is slidably matched with the support block and communicated with the annular mounting groove.
[0017] By adopting the above technical solution and setting the support block, the probability of the telescopic tube sliding out of the sleeve due to the reverse thrust of the spring is reduced.
[0018] Furthermore, an annular rubber sheet is fixedly sleeved on the outer wall of the sleeve.
[0019] By adopting the above technical solution and setting the annular rubber sheet, the probability of workers slipping due to sweat or other factors during the squeezing process of the handheld rebound tester is reduced.
[0020] In summary, the utility model has the following beneficial effects:
[0021] 1. In this application, when the staff needs to measure the wall, the staff needs to place the end of the impact rod close to the wall against the wall, and the staff holds the rebound tester to squeeze the wall. In the process of squeezing the impact rod, the telescopic tube maintains a state of being in contact with the wall under the force of the spring, which enhances the stability of the concrete strength tester in the process of strength testing the concrete wall, and reduces the probability of reduced accuracy of the measurement data due to the uneven force of the impact rod during the squeezing process.
[0022] 2. In the present application, the provision of the annular block increases the contact area between the annular block and the wall when the staff squeezes the impact rod against the wall, thereby enhancing the stability of the staff when squeezing the impact rod to test the strength of the concrete wall. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0024] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model;
[0025] Figure 3 yes Figure 2 A magnified schematic diagram of center A.
[0026] In the figure: 1. Rebound tester body; 2. Rebound rod; 3. Vertical assembly; 31. Sleeve; 311. Annular mounting groove; 312. Slide groove; 32. Telescopic cylinder; 321. Annular block; 322. Through groove; 323. Support block; 33. Spring; 4. Annular rubber pad; 41. Bolt; 42. Anti-sliding block; 5. Annular rubber sheet. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be clearly and completely 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, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.
[0028] like Figure 1-3 As shown, the embodiment of the present application discloses a concrete strength tester, comprising a rebound hammer body 1 and a vertical assembly 3. A striking rod 2 is disposed at the end of the rebound hammer body 1, and the axis of the rebound hammer body 1 coincides with the axis of the striking rod 2.
[0029] The vertical component 3 is arranged on the rebound tester body 1 and is used to keep the rebound tester perpendicular to the test surface. The vertical component 3 includes a sleeve 31, a telescopic cylinder 32 and a spring 33. The sleeve 31 is sleeved on the rebound tester body 1, the telescopic cylinder 32 is arranged on the rebound tester body 1 and slidably cooperates with the sleeve 31, and the spring 33 is arranged in the sleeve 31. In this embodiment, an annular mounting groove 311 is arranged at the intersection between the side of the sleeve 31 close to the measuring end of the impact rod 2 and the inner wall of the sleeve 31, the telescopic cylinder 32 is arranged in the sleeve 31 and cooperates with the annular mounting groove 311, the inner wall of the telescopic cylinder 32 is in contact with the outer wall of the rebound tester body 1, the lower end of the spring 33 is fixed to the inner bottom wall of the annular mounting groove 311, and the axis of the sleeve 31 coincides with the axis of the telescopic cylinder 32, the axis of the rebound tester body 1 and the axis of the impact rod 2.
[0030] When the staff needs to measure the wall, the staff needs to place the end of the impact rod 2 close to the wall against the wall, and the staff holds the rebound tester to squeeze the wall. In the process of squeezing the impact rod 2, the telescopic tube 32 maintains a state of being in contact with the wall under the action of the spring 33, thereby enhancing the stability of the concrete strength tester during the strength test of the concrete wall and reducing the probability of reduced accuracy of the measurement data due to the shaking of the impact rod 2 due to uneven force during the squeezing process.
[0031] In order to enhance the stability of the staff when squeezing the impact rod 2 to test the strength of the concrete wall, an annular block 321 is fixed to the end of the telescopic cylinder 32 away from the sleeve 31. The area of the upper surface of the annular block 321 is larger than the area of the lower surface. The cross-section of the annular block 321 is circular, and the inner diameter of the annular block 321 is equal to the outer diameter of the telescopic cylinder 32, thereby increasing the contact area between the annular block 321 and the wall when the staff squeezes the impact rod 2 against the wall.
[0032] In order to reduce the probability that the annular block 321 is displaced by external force and the accuracy of the measurement data is reduced when the staff squeezes the impact rod 2, an annular rubber pad 4 is provided on the top surface of the annular block 321, and the inner diameter of the annular rubber pad 4 is equal to the inner diameter of the annular block 321.
[0033] In order to facilitate the staff to disassemble and replace the worn annular rubber pad 4 at a later time, a bolt 41 is provided through the annular rubber pad 4 to match the clearance of the annular rubber pad 4, an anti-sliding block 42 is fixed to the side wall of the annular block 321, and the end of the bolt 41 is threadedly connected to the top of the annular block 321. The provision of the anti-sliding block 42 reduces the probability of slipping and causing installation inconvenience when the staff is installing and replacing the annular rubber pad 4.
[0034] In order to facilitate the staff to observe the use status of the impact rod 2 in real time, a through groove 322 is set on the side wall of the telescopic cylinder 32 to facilitate the staff to observe the impact rod 2, so as to avoid the situation where the telescopic cylinder 32 blocks the impact rod 2, making it difficult for the staff to find and replace the impact rod 2 in time, which is conducive to the normal use of the concrete strength tester.
[0035] In order to reduce the probability that the telescopic cylinder 32 will slip out of the sleeve 31 due to the reverse thrust of the spring 33, a support block 323 is fixed on the outer wall of the telescopic cylinder 32 near the sleeve 31, and a sliding groove 312 is provided in the sleeve 31, which is slidably matched with the support block 323 and connected to the annular mounting groove 311.
[0036] In order to reduce the probability of workers slipping due to sweat or other factors during the squeezing process of the handheld rebound tester, an annular rubber sheet 5 is fixedly sleeved on the outer wall of the sleeve 31.
[0037] The use principle of a concrete strength tester in the present embodiment is as follows: when the staff needs to measure the wall, the staff needs to place the end of the impact rod 2 close to the wall against the wall, and the staff holds the rebound tester to squeeze the wall. In the process of squeezing the impact rod 2, the telescopic tube 32 maintains a state of being in contact with the wall under the action of the spring 33, thereby enhancing the stability of the concrete strength tester in the process of strength testing the concrete wall, and reducing the probability of reduced accuracy of the measurement data due to shaking of the impact rod 2 due to uneven force during the squeezing process.
[0038] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A concrete strength tester, comprising a rebound tester body (1) and a striking rod (2) arranged at the end of the rebound tester body (1), characterized in that: The rebound tester body (1) is provided with a vertical component (3) for keeping the rebound tester perpendicular to the test surface. The vertical component (3) comprises a sleeve (31) sleeved on the rebound tester body (1), a telescopic cylinder (32) arranged on the rebound tester body (1) and slidably matched with the sleeve (31), and a spring (33) arranged in the sleeve (31). An annular mounting groove (311) is arranged at the intersection between the side of the sleeve (31) close to the measuring end of the impact rod (2) and the inner wall of the sleeve (31). The telescopic cylinder (32) is arranged in the telescopic cylinder sleeve (31) and matches with the annular mounting groove (311). The inner wall of the telescopic cylinder (32) is in contact with the outer wall of the rebound tester body (1), and the lower end of the spring (33) is fixed to the inner bottom wall of the annular mounting groove (311).
2. A concrete strength tester according to claim 1, characterized in that: An annular block (321) is fixed to one end of the telescopic cylinder (32) away from the sleeve (31); the area of the upper surface of the annular block (321) is larger than the area of the lower surface; the cross section of the annular block (321) is in the shape of a circular ring; and the inner diameter of the annular block (321) is equal to the outer diameter of the telescopic cylinder (32).
3. A concrete strength tester according to claim 2, characterized in that: An annular rubber pad (4) is provided on the top surface of the annular block (321), and the inner diameter of the annular rubber pad (4) is equal to the inner diameter of the annular block (321).
4. A concrete strength tester according to claim 3, characterized in that: The annular rubber pad (4) is provided with a bolt (41) which is loosely matched with the annular rubber pad (4), an anti-sliding block (42) is fixed to the side wall of the annular block (321), and the end of the bolt (41) is threadedly connected to the top of the annular block (321).
5. A concrete strength tester according to claim 1, characterized in that: A through slot (322) is provided through the side wall of the telescopic cylinder (32) to facilitate staff to observe the impact rod (2).
6. A concrete strength tester according to claim 1, characterized in that: A support block (323) is fixed on the outer wall of the telescopic cylinder (32) at a position close to the sleeve (31), and a sliding groove (312) is provided in the sleeve (31) and is slidably matched with the support block (323) and is connected to the annular mounting groove (311).
7. A concrete strength tester according to claim 1, characterized in that: An annular rubber sheet (5) is fixedly sleeved on the outer wall of the sleeve (31).