Concrete hardness detection device
By introducing a guide mechanism and a clamping mechanism into the concrete hardness detection device, the problems of low detection accuracy and difficulty in detecting small samples in the prior art are solved, and the detection effect of high accuracy and convenient operation is achieved.
Patent Information
- Application Number
- CN202421914134.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The existing concrete hardness detection device requires the operator to control the perpendicularity of the blast hammer and the concrete surface by itself, which can easily cause the blast hammer angle to shift, affect the detection accuracy, and is difficult to be used for the detection of small concrete samples, and it usually requires multiple assistance.
A concrete hardness detection device is designed, using a guide mechanism and a clamping mechanism. The rebound hammer of the rebound instrument is kept perpendicular to the concrete surface through the guide slide cylinder and abutment ring frame. The clamping mechanism can clamp small samples, and the rebound mechanism adjusts the position of the guide mechanism and the rebound force.
It improves detection accuracy, avoids offset from the hammer, simplifies the operation process, and can complete the inspection by a single person, which is suitable for the inspection of small concrete samples.
Smart Images
Figure CN223021819U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete measurement, and particularly relates to a concrete hardness detection device. Background Art
[0002] The hardness of concrete usually refers to the compressive strength of concrete, which is an index to measure the ability of concrete materials to resist pressure damage. The hardness of concrete can be represented by different strength grades, such as C10, C15, C20, C25, C30, etc. These grades represent the compressive strength of concrete after reaching a specific age (usually 28 days), and the unit is N per square millimeter. For example, the compressive strength of C10 concrete is 10 N per square millimeter, and the compressive strength of C20 concrete is 20 N per square millimeter. There are many ways to detect the hardness of concrete, and the applicable ranges and conditions are also different. Choosing a suitable detection method requires considering specific application scenarios and requirements.
[0003] During the current building construction process, the rebound method is usually used to detect the hardness of concrete. Its working principle is that a spring-driven impact hammer impacts the concrete surface, and the surface hardness of the concrete is evaluated according to the rebound height of the impact hammer, so as to infer the compressive strength of the concrete. During the process of using a rebound instrument to detect the hardness of concrete by the rebound method, the impact hammer needs to be perpendicular to the concrete surface being detected to ensure relatively accurate detection data. However, during the use of the rebound instrument, the operator needs to control the perpendicularity of the impact hammer to the concrete surface by himself, which is likely to cause the angle of the impact hammer to deviate, affecting the detection accuracy. Moreover, it is difficult to use for hardness detection of small concrete samples, and multiple people are required to assist in the hardness detection during the operation. Therefore, this application provides a concrete hardness detection device to meet the needs. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a concrete hardness detection device to solve the problems that in the existing concrete hardness detection device for concrete measurement, the operator needs to control the perpendicularity of the impact hammer to the concrete surface by himself, which is likely to cause the angle of the impact hammer to deviate, affecting the detection accuracy, and it is difficult to use for hardness detection of small concrete samples, and multiple people are required to assist in the hardness detection during the operation.
[0005] To solve the above technical problems, the utility model provides the following technical solutions:
[0006] A concrete hardness detection device includes a rebound hammer. A pair of slide rails are fixedly connected to the outer wall of the rebound hammer. A guiding mechanism is arranged on the outer wall of the rebound hammer. The guiding mechanism is used to guide the moving direction of the rebound hammer so that the impact hammer of the rebound hammer is perpendicular to the concrete surface. A clamping mechanism is arranged inside the guiding mechanism. The clamping mechanism is used to clamp and fix the concrete sample. A rebound mechanism is arranged at the top of the rebound hammer. The rebound mechanism is used to adjust the position of the guiding mechanism and the rebound force, thereby assisting the rebound hammer to complete the concrete hardness detection operation.
[0007] Optionally, the rebound mechanism includes a sliding box frame fixedly connected to the top of the rebound hammer. A positioning hole is opened at the top of the sliding box frame. A positioning pin rod is rotatably installed inside the positioning hole. One end of the positioning pin rod is located inside the sliding box frame. A positioning plug is rotatably installed at one end of the sliding box frame. One end of the positioning plug is inserted and buckled with a spring column. The spring column is located inside the sliding box frame.
[0008] Optionally, the guiding mechanism includes a guiding sliding cylinder slidably installed on the outer wall of the slide rail. A sliding groove is opened at the top of the guiding sliding cylinder. The sliding box frame is located inside the sliding groove. A sliding frame is fixedly connected inside the sliding groove. The size of the sliding frame matches the size of the sliding groove inside the sliding box frame. And the sliding frame is slidably installed inside the sliding groove of the sliding box frame. And the sliding frame is fixedly connected to one end of the spring column. One end of the guiding sliding cylinder is fixedly connected with a abutting ring frame. One end of the abutting ring frame is arranged in parallel with one end of the impact hammer of the rebound hammer.
[0009] Optionally, the clamping mechanism includes a pull rod installed inside the guiding sliding cylinder through a spring cylinder sleeve. One end of the pull rod is fixedly connected with a support rod. One end of the support rod is fixedly connected with a clamping ring frame. The clamping ring frame abuts against one end of the abutting ring frame. A positioning buckle is fixedly connected to the outer wall of the clamping ring frame. The other end of the pull rod is fixedly connected with a pull plate. A pulling rod is fixedly connected to the outer wall of the pull plate. The bottom end of the pull plate is slidably installed on the outer wall of the slide rail.
[0010] Optionally, a handle is fixedly connected to the bottom end of the rebound hammer. A grip rod is connected to the bottom end of the rebound hammer through a rotating shaft. The handle is arranged in an L shape.
[0011] Optionally, a compensation pad is rotatably installed at one end of the rebound hammer. The size of the compensation pad matches the size of the inner groove of the abutting ring frame.
[0012] Optionally, the guiding sliding cylinder is in a semi-cylindrical shape, and the guiding sliding cylinder and the abutting ring frame are of an integral structure.
[0013] Optionally, a marking hole is opened at one end of the abutting ring frame. A liquid storage cavity is opened inside the abutting ring frame.
[0014] Optionally, the entire guiding mechanism is made of resin material.
[0015] Optionally, the grip and the grip rod are both made of plastic wrapped with rubber sleeves.
[0016] Compared with the prior art, the utility model has at least the following beneficial effects:
[0017] In the above solution, through the abutting ring frame fixedly connected to one end of the guiding sliding cylinder, the concrete surface to be detected can be abutted, so that the impact hammer of the rebound hammer is perpendicular to the concrete surface, thereby improving the detection accuracy. The setting of the guiding sliding cylinder can limit and guide the rebound hammer, avoiding the situation that the impact hammer of the rebound hammer deviates during the process of pushing the rebound hammer, which affects the detection accuracy.
[0018] Through the positioning plug rotatably installed at one end of the sliding box frame, the spring column inserted and buckled at one end of the positioning plug can be adjusted by rotation, changing the elasticity of the spring column, and then the rebound strength of the guiding sliding cylinder can be adjusted in cooperation with the sliding frame fixedly connected inside the sliding groove, so as to meet the rebound reset requirement of the guiding sliding cylinder after the rebound hammer detects the concrete.
[0019] The L-shaped grip conforms to ergonomics, can provide a comfortable holding force, is convenient for the user to push the rebound hammer, and completes the hardness detection requirement of the concrete. The grip rod connected to the bottom end of the rebound hammer through a rotating shaft can cooperate with the grip, facilitating the user to hold the rebound hammer with both hands and improving the comfort of the operator applying pressure to the rebound hammer.
[0020] Through the marking hole opened at one end of the abutting ring frame, a seal or label for marking can be fixed. The printing liquid is poured into the liquid storage cavity opened inside the abutting ring frame, and the printing liquid will penetrate into the seal or label inside the marking hole. During the process of detecting the hardness of the concrete, the abutting ring frame abuts against the concrete detection surface, and the seal or label in the marking hole will leave an imprint on the concrete detection surface, thus preventing the operator from missing a measurement.
[0021] The whole device is simple and convenient to operate, has a high use comfort, ensures that the rebound hammer is perpendicular to the concrete surface, does not require multiple people to cooperate for detection, can also meet the needs of small sample detection, and can surface the detection surface, thereby preventing the occurrence of missing measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the utility model and, together with the specification, are further used to explain the principles of the utility model and enable those skilled in the relevant art to implement and use the utility model.
[0023] Figure 1 It is a first perspective three-dimensional structural schematic diagram of a concrete hardness detection device;
[0024] Figure 2 Schematic diagram of the three-dimensional structure of the concrete hardness detection device from the second perspective
[0025] Figure 3 Schematic diagram of the three-dimensional structure of the concrete hardness detection device from the third perspective
[0026] Figure 4 Schematic diagram of the three-dimensional structure of the rebound hammer
[0027] Figure 5 Schematic diagram of the three-dimensional structure of the guiding mechanism
[0028] [Reference numerals]
[0029] 1. Rebound hammer; 2. Guiding mechanism; 3. Clamping mechanism; 4. Handle; 5. Rebound mechanism; 6. Holding rod; 7. Complementary pad; 8. Sliding box frame; 9. Guiding sliding cylinder; 10. Abutting ring frame; 11. Support rod; 12. Clamping ring frame; 13. Pull rod; 14. Pulling plate; 15. Positioning buckle; 16. Pulling rod; 17. Positioning hole; 18. Positioning pin rod; 19. Chute; 20. Sliding frame; 21. Slide rail; 22. Positioning plug; 23. Spring column; 24. Marking hole
[0030] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs Detailed implementation manners
[0031] The following describes in detail a concrete hardness detection device provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention
[0032] It should be pointed out that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art
[0033] Generally, terms can be understood at least in part from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or property in a singular sense, or can be used to describe a combination of features, structures, or properties in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather can alternatively, depending at least in part on the context, allow for the existence of other factors that are not necessarily explicitly described.
[0034] It can be understood that the meanings of "on", "above", and "over" in the present utility model should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.
[0035] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. can be used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive words used herein can be similarly interpreted accordingly.
[0036] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a concrete hardness detection device, including a rebound hammer 1. A pair of slide rails 21 are fixedly connected to the outer wall of the rebound hammer 1. A guiding mechanism 2 is arranged on the outer wall of the rebound hammer 1. The guiding mechanism 2 is used to guide the moving direction of the rebound hammer 1 so that the impact hammer of the rebound hammer 1 is perpendicular to the concrete surface. A clamping mechanism 3 is arranged inside the guiding mechanism 2. The clamping mechanism 3 is used to clamp and fix the concrete sample. A rebound mechanism 5 is arranged at the top of the rebound hammer 1. The rebound mechanism 5 is used to adjust the position of the guiding mechanism 2 and the rebound force, thereby assisting the rebound hammer 1 to complete the concrete hardness detection operation.
[0037] One end of the guiding mechanism 2 is abutted against the concrete measuring surface, and then the rebound hammer 1 is pushed to move along the guiding mechanism 2, so that the impact hammer of the rebound hammer 1 is vertically abutted against the concrete measuring surface, thereby improving the measurement accuracy. Through the clamping mechanism 3 arranged inside the guiding mechanism 2, small concrete samples can be clamped and fixed according to the detection requirements, and then the rebound hammer 1 is used to measure their hardness, improving the convenience of concrete hardness measurement. The rebound mechanism 5 arranged at the top end of the rebound hammer 1 can be used to adjust the rebound strength of the guiding mechanism 2 and the position of the guiding mechanism 2, so as to meet the requirements and convenience of concrete hardness detection.
[0038] As Figure 2 and Figure 4 shown, the rebound mechanism 5 includes a sliding box frame 8 fixedly connected to the top end of the rebound hammer 1. A positioning hole 17 is formed at the top end of the sliding box frame 8. A positioning pin rod 18 is rotatably installed inside the positioning hole 17. One end of the positioning pin rod 18 is located inside the sliding box frame 8. One end of the sliding box frame 8 is rotatably installed with a positioning plug 22. One end of the positioning plug 22 is inserted and installed with a spring column 23. The spring column 23 is located inside the sliding box frame 8. The guiding mechanism 2 includes a guiding sliding cylinder 9 slidably installed on the outer wall of the slide rail 21. A sliding groove 19 is formed at the top end of the guiding sliding cylinder 9. The sliding box frame 8 is located inside the sliding groove 19. A sliding frame 20 is fixedly connected inside the sliding groove 19. The size of the sliding frame 20 matches the size of the sliding groove inside the sliding box frame 8, and the sliding frame 20 is slidably installed inside the sliding groove of the sliding box frame 8, and the sliding frame 20 is fixedly connected to one end of the spring column 23. One end of the guiding sliding cylinder 9 is fixedly connected with an abutting ring frame 10. One end of the abutting ring frame 10 is arranged in parallel with one end of the impact hammer of the rebound hammer 1. Through the abutting ring frame 10 fixedly connected to one end of the guiding sliding cylinder 9, the concrete surface to be detected can be abutted, so that the impact hammer of the rebound hammer 1 is perpendicular to the concrete surface, improving the detection accuracy. The setting of the guiding sliding cylinder 9 can limit and guide the rebound hammer 1, avoiding the situation that the impact hammer of the rebound hammer 1 deviates during the process of pushing the rebound hammer 1, which affects the detection accuracy. Through the positioning plug 22 rotatably installed at one end of the sliding box frame 8, the spring column 23 inserted and installed at one end of the positioning plug 22 can be adjusted by rotation, changing the elasticity of the spring column 23, and then cooperating with the sliding frame 20 fixedly connected inside the sliding groove 19, the rebound strength of the guiding sliding cylinder 9 can be adjusted, so as to meet the rebound reset requirement of the guiding sliding cylinder 9 after the rebound hammer 1 detects the concrete.
[0039] As Figure 2 、 Figure 3 and Figure 5As shown, the clamping mechanism 3 includes a pull rod 13 installed inside the guiding sliding cylinder 9 through a spring cylinder sleeve. One end of the pull rod 13 is fixedly connected to a support rod 11. One end of the support rod 11 is fixedly connected to a clamping ring frame 12. The clamping ring frame 12 abuts against one end of the abutting ring frame 10. A positioning buckle 15 is fixedly connected to the outer wall of the clamping ring frame 12. The other end of the pull rod 13 is fixedly connected to a pull plate 14. A pulling rod 16 is fixedly connected to the outer wall of the pull plate 14. The bottom end of the pull plate 14 is slidably installed on the outer wall of the slide rail 21. By pulling the pulling rod 16 fixedly connected to the outer wall of the pull plate 14, the clamping ring frame 12 is moved, so that a clamping space is generated between the clamping ring frame 12 and the abutting ring frame 10. A small concrete sample to be tested is placed between the clamping ring frame 12 and the abutting ring frame 10. Then the pulling rod 16 is released, and the pull rod 13 rebounds through the spring cylinder, driving the displacement of the clamping ring frame 12 to abut against the small concrete sample, completing the clamping of the small concrete sample, and then pushing the rebound hammer 1 to perform hardness detection on the small concrete sample, improving the detection convenience of the concrete and making it unnecessary for multiple people to assist in the operation.
[0040] As Figures 1 to 3 shown, a handle 4 is fixedly connected to the bottom end of the rebound hammer 1. The bottom end of the rebound hammer 1 is connected to a grip rod 6 through a rotating shaft. The handle 4 is arranged in an L shape. The handle 4 arranged in an L shape conforms to ergonomics, can provide a comfortable holding force, and is convenient for the user to push the rebound hammer 1 to complete the hardness detection requirement of the concrete. The grip rod 6 connected to the bottom end of the rebound hammer 1 through a rotating shaft can cooperate with the handle 4 to facilitate the user to hold the rebound hammer 1 with both hands and improve the comfort of the operator pressing the rebound hammer 1.
[0041] As Figure 3 shown, a compensating pad 7 is rotatably installed at one end of the rebound hammer 1. The size of the compensating pad 7 matches the size of the inner groove of the abutting ring frame 10. After removing the compensating pad 7 rotatably installed at one end of the rebound hammer 1 and then installing it in the inner groove of the abutting ring frame 10, the groove of the abutting ring frame 10 can be filled, so as to meet the requirement of pressing for hardness detection after clamping and fixing the small concrete sample, and avoid the operation of the small concrete sample for rebound hardness detection being affected by the groove of the abutting ring frame 10.
[0042] As Figure 1 and Figure 5 shown, the guiding sliding cylinder 9 is in a semi-cylindrical shape, and the guiding sliding cylinder 9 and the abutting ring frame 10 are of an integral structure. The semi-cylindrical guiding sliding cylinder 9 can wrap the outer wall of the rebound hammer 1, thus playing a role in protecting the rebound hammer 1, and at the same time can also guide and limit the displacement direction of the rebound hammer 1.
[0043] As Figure 3As shown, one end of the abutting ring frame 10 is provided with a marking hole 24, and a liquid storage cavity is formed inside the abutting ring frame 10. The marking hole 24 provided at one end of the abutting ring frame 10 can fix a seal or label for marking. The printing liquid is poured into the liquid storage cavity formed inside the abutting ring frame 10, and the printing liquid will penetrate into the seal or label inside the marking hole 24. During the process of detecting the hardness of concrete, the abutting ring frame 10 abuts against the concrete detection surface, and the seal or label in the marking hole 24 will leave a mark on the concrete detection surface, thus avoiding the situation of missed detection by the operator.
[0044] As Figures 1 to 3 shown, the whole guiding mechanism 2 is made of resin material. The guiding mechanism 2 made of resin material is light in texture, will not excessively increase the weight of the equipment, making it convenient to move and carry, and has a low production cost, thereby reducing the accessory maintenance cost of the whole device.
[0045] As Figures 1 to 3 shown, the grip 4 and the grip rod 6 are both made of plastic wrapped with rubber sleeves. The grip 4 and the grip rod 6 made of plastic wrapped with rubber sleeves are light in weight and have good anti-slip effects.
[0046] The working principle provided by the present utility model is as follows: Hold the grip 4 at the bottom end of the rebound hammer 1, abut the abutting ring frame 10 against the concrete surface where the hardness needs to be tested, and then push the rebound hammer 1 to make the rebound hammer 1 move along the guiding sliding cylinder 9. Use the impact hammer of the rebound hammer 1 to press against the concrete detection surface and then reset and rebound to complete the hardness detection of the concrete. When it is necessary to detect a small concrete sample, remove the compensation pad 7 rotatably installed at one end of the rebound hammer 1 and then install it in the groove inside the abutting ring frame 10 to fill the groove of the abutting ring frame 10. Pull the pulling rod 16 fixedly connected to the outer wall of the pulling plate 14 to move the clamping ring frame 12 to generate a clamping space between the clamping ring frame 12 and the abutting ring frame 10. Place the small concrete sample to be detected between the clamping ring frame 12 and the abutting ring frame 10, and then release the pulling rod 16 to make the pulling rod 13 rebound through the spring cylinder, driving the clamping ring frame 12 to displace and abut against the small concrete sample to complete the clamping of the small concrete sample, and then push the rebound hammer 1 to conduct a hardness detection on the small concrete sample, improving the detection convenience of the concrete and making it unnecessary for multiple people to assist in the operation.
[0047] During the use of the entire device, through the abutting ring frame 10 fixedly connected to one end of the guiding sliding cylinder 9, it can abut against the concrete surface to be detected, so that the impact hammer of the rebound hammer 1 is perpendicular to the concrete surface, improving the detection accuracy. The setting of the guiding sliding cylinder 9 can limit and guide the rebound hammer 1, avoiding the situation that the impact hammer of the rebound hammer 1 deviates during the process of pushing the rebound hammer 1, which affects the detection accuracy. Through the positioning plug 22 rotatably installed at one end of the sliding box frame 8, the spring column 23 inserted and buckled at one end of the positioning plug 22 can be adjusted by rotation, changing the elasticity of the spring column 23. Then, it can cooperate with the sliding frame 20 fixedly connected inside the sliding groove 19 to adjust the rebound strength of the guiding sliding cylinder 9, so as to meet the rebound reset requirement of the guiding sliding cylinder 9 after the rebound hammer 1 detects the concrete. The grip 4 arranged in an L shape conforms to ergonomics, can provide a comfortable gripping force, and is convenient for the user to push the rebound hammer 1 to complete the hardness detection requirement of the concrete. The grip rod 6 connected to the bottom end of the rebound hammer 1 through a rotating shaft can cooperate with the grip 4, facilitating the user to hold the rebound hammer 1 with both hands and improving the comfort of the operator applying pressure to the rebound hammer 1. The marking hole 24 opened at one end of the abutting ring frame 10 can fix the seal or marking used for marking. Pour the printing liquid into the liquid storage cavity opened inside the abutting ring frame 10, and the printing liquid will penetrate into the seal or marking inside the marking hole 24. During the process of detecting the hardness of the concrete, the abutting ring frame 10 abuts against the concrete detection surface, and the seal or marking in the marking hole 24 will leave a mark on the concrete detection surface, thus avoiding the situation of missed detection by the operator.
[0048] The present utility model covers any substitutions, modifications, equivalent methods, and solutions made on the essence and scope of the present utility model. In order to enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the following preferred embodiments of the present utility model. However, those skilled in the art can fully understand the present utility model without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of the present utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.
[0049] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.
Claims
1. A concrete hardness detection device, characterized in that: It comprises a rebound hammer, the outer wall of which is fixedly connected with a pair of slide rails; The outer wall of the rebound hammer is provided with a guide mechanism, which is used to guide the moving direction of the rebound hammer so that the rebound hammer of the rebound hammer is kept perpendicular to the concrete surface; A clamping mechanism is provided inside the guide mechanism, and the clamping mechanism is used to clamp and fix the concrete sample; A rebound mechanism is arranged at the top of the rebound tester, and the rebound mechanism is used to adjust the position of the guide mechanism and the rebound force, thereby assisting the rebound tester to complete the concrete hardness detection operation.
2. The concrete hardness detection device according to claim 1, characterized in that: The rebound mechanism includes a sliding box frame fixedly connected to the top of the rebound instrument, a positioning hole is opened at the top of the sliding box frame, a positioning pin rod is rotatably installed inside the positioning hole, one end of the positioning pin rod is located inside the sliding box frame, a positioning plug is rotatably installed at one end of the sliding box frame, a spring column is buckled and installed at one end of the positioning plug, and the spring column is located inside the sliding box frame.
3. The concrete hardness detection device according to claim 2, characterized in that: The guide mechanism includes a guide slide cylinder slidably installed on the outer wall of the slide rail, a slide groove is opened on the top of the guide slide cylinder, the sliding box frame is located inside the slide groove, a sliding frame is fixedly connected inside the slide groove, the sliding frame size matches the size of the slide groove inside the sliding box frame, and the sliding frame is slidably installed inside the slide groove of the sliding box frame, and the sliding frame is fixedly connected to one end of the spring column, one end of the guide slide cylinder is fixedly connected to a supporting ring frame, and one end of the supporting ring frame is arranged parallel to one end of the rebound instrument hammer.
4. The concrete hardness detection device according to claim 3, characterized in that: The clamping mechanism includes a pull rod installed inside the guide slide cylinder through a spring sleeve, one end of the pull rod is fixedly connected to a support rod, one end of the support rod is fixedly connected to a clamping ring frame, the clamping ring frame is abutted against one end of the abutting ring frame, the outer wall of the clamping ring frame is fixedly connected to a positioning buckle, the other end of the pull rod is fixedly connected to a pull plate, the outer wall of the pull plate is fixedly connected to a pulling rod, and the bottom end of the pull plate is slidably installed on the outer wall of the slide rail.
5. The concrete hardness detection device according to claim 1, characterized in that: The bottom end of the rebound instrument is fixedly connected with a handle, the bottom end of the rebound instrument is connected with a handle rod through a rotating shaft, and the handle is arranged in an L shape.
6. The concrete hardness detection device according to claim 3, characterized in that: A filling pad is rotatably mounted on one end of the rebound tester, and the size of the filling pad matches the size of the inner groove body of the abutting ring frame.
7. The concrete hardness detection device according to claim 3, characterized in that: The guide slide cylinder is semi-cylindrical, and the guide slide cylinder and the abutting ring frame are an integral structure.
8. The concrete hardness detection device according to claim 3, characterized in that: A marking hole is provided at one end of the abutting ring frame, and a liquid storage cavity is provided inside the abutting ring frame.
9. The concrete hardness detection device according to claim 1, characterized in that: The guide mechanism is entirely made of resin material.
10. The concrete hardness detection device according to claim 5, characterized in that: The handle and the grip rod are both made of plastic wrapped with a rubber sleeve.