Nondestructive testing device for reinforced concrete structure
By designing a cylinder, handle, and guide structure on the outside of the rebound hammer, the problem of traditional rebound hammers being unable to maintain verticality is solved, achieving higher detection accuracy and ease of operation.
Patent Information
- Application Number
- CN202421428873.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-06-21
AI Technical Summary
When traditional rebound hammers are used to test reinforced concrete structures, the cone-shaped structure with a central protrusion at the front end of the impact rod makes it difficult to keep the instrument axis perpendicular to the concrete surface, resulting in a large testing error.
A cylindrical body fitted onto the outside of the rebound hammer is designed, equipped with a handle, guide rod, and guide tube. The contact area is increased by an annular plate, and the cylinder is kept perpendicular to the concrete surface by a spring. The accuracy of operation is ensured by a sight glass and a strip hole.
It improves the perpendicularity of the rebound hammer to the concrete surface, reduces the difficulty of operation, ensures the accuracy and convenience of testing, and reduces errors.
Smart Images
Figure CN223526183U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to concrete rebound detection technical field, especially in a kind of reinforced concrete structure nondestructive testing device. BACKGROUND
[0002] It is a common concrete nondestructive testing method to detect the surface hardness of reinforced concrete using rebound hammer. Rebound hammer is a direct hammering instrument, which uses a hammer to impact the impact rod in contact with the surface of concrete, and then the hammer bounces back, and the rebound value is indicated on the scale of rebound hammer. The rebound hammer surface has a button. The rebound value depends on the rebound energy related to the impact energy, and the rebound energy reflects the functional relationship between the surface hardness of concrete and the compressive strength of concrete, that is, a functional relationship can be established between the compressive strength of concrete and the rebound value, and the rebound value is used to represent the compressive strength of concrete.
[0003] The operation process of rebound hammer requires that the instrument axis is always perpendicular to the surface of concrete and slowly and uniformly applies pressure. After the hammer unhooked impacts the impact rod, the hammer bounces back and drives the pointer to move backward to a certain position, and the indicating line on the pointer block shows a certain value on the scale, which is the rebound value.
[0004] The traditional rebound hammer is generally manually operated by both hands, and the front end of the impact rod of the rebound hammer is not a flat surface, but a conical structure with a central protrusion. This makes it difficult to keep the instrument axis perpendicular to the surface of concrete during operation, resulting in certain detection errors. UTILITY MODEL CONTENT
[0005] The utility model aims to solve the problems in the prior art and provides a reinforced concrete structure nondestructive testing device.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A reinforced concrete structure nondestructive testing device includes a rebound hammer, the rebound hammer includes an impact rod, a scale and a button, the rebound hammer is connected with a handle on the outer ring side, further includes a cylinder which is sleeved on the outer side of the rebound hammer, the side wall of the cylinder is provided with a plurality of axial strip-shaped holes, and the strip-shaped holes are one-to-one corresponding to the handle, the scale and the button.
[0008] Further, the cylinder is vertically connected with a ring plate at one end close to the impact rod, and the inner ring edge of the ring plate corresponds to and is connected with the cylinder.
[0009] Further, the side wall of the cylinder is provided with a plurality of viewing holes at one end close to the impact rod.
[0010] Further, the barrel body is provided with an external thread section outside the end of the ejector rod, and the strip-shaped holes extend to the edge of the end of the barrel body.
[0011] Further, the number of the handle is two, and the two handles are symmetrical to the two sides of the rebound apparatus.
[0012] Further, the handle is connected with a guide rod on one side, and the barrel body is provided with a guide tube corresponding to the guide rod, and the guide rod slides along the inner side of the guide tube.
[0013] Further, a spring is further included, and the guide rod and the guide tube are located inside the spring.
[0014] Compared with the prior art, the rebound apparatus has the advantages that:
[0015] The barrel body is arranged outside the rebound apparatus, the barrel body can protect the rebound apparatus, and the rebound apparatus is always perpendicular to the concrete surface during operation, so that the operation difficulty is reduced, and the detection accuracy is ensured; the handle is used to drive the rebound apparatus, the strip-shaped holes do not affect the movement, pressure and reading of the rebound apparatus;
[0016] The double-handle structure makes the rebound apparatus drive more balanced and easy to operate, the annular plate improves the contact area with the concrete surface, the barrel body and the rebound apparatus are perpendicular to the concrete surface, the sight hole is used to accurately correspond to the detection point, and the guide rod, the guide tube and the spring make the barrel body close to the concrete during operation. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is an explosion schematic view of the utility model.
[0018] Figure 2 It is a first perspective view of the utility model.
[0019] Figure 3 It is a second perspective view of the utility model.
[0020] Figure 4 It is a top view of the utility model.
[0021] Figure 5 It is a barrel body structure schematic view of the utility model.
[0022] Figure 6 It is a rebound apparatus structure schematic view of the utility model.
[0023] In the drawing: 1, rebound apparatus; 2, handle; 3, barrel body; 4, guide rod; 5, guide tube; 6, spring; 7, threaded end cover;
[0024] 101, impact lever; 102, scale; 103, button;
[0025] 301, bar hole; 302, ring plate; 303, sight hole; 304, external thread section. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described examples are only a part of the examples of the utility model, but not all the examples. The components of the utility model embodiments described and shown in the drawings herein can be arranged and designed in various different configurations.
[0027] In the description of the utility model, unless explicitly defined and limited, the terms "mounting", "connection" and "connection" that may appear should be broadly understood, for example, it can be fixedly connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] In the description of the utility model, it should be pointed out that, unless explicitly defined and limited, the term "provided with" that may appear should be broadly understood, for example, the object of "provided with" can be part of the body, or it can be arranged separately from the body and connected to the body, and the connection can be detachable connection, or it can be non-detachable connection. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0029] The utility model will be further described in combination with examples.
[0030] The specific embodiment of the reinforced concrete structure nondestructive testing device provided by the utility model:
[0031] Please refer to Figures 1-6 , the reinforced concrete structure nondestructive testing device, including rebound hammer 1 and cylinder 3, the cylinder 3 is sleeved outside the rebound hammer 1, and the rebound hammer 1 can move axially along the inner side of the cylinder 3.
[0032] The rebound hammer 1 includes impact lever 101, scale 102 and button 103; the internal structure and working principle of the rebound hammer 1 are prior art, which will not be described in detail in the embodiment.
[0033] The rebound hammer 1 is connected with the handle 2 on the outer ring side; the number of the handle 2 is two, and the two handles 2 are symmetrical to the two sides of the rebound hammer 1. When driving the rebound hammer 1, the two handles 2 are held by two hands, the force driving is more balanced, the deflection phenomenon can be effectively reduced, the operation is easier, and it is beneficial to make the rebound hammer 1 always perpendicular to the reinforced concrete surface to be detected.
[0034] The side wall of the barrel 3 is provided with a plurality of axial strip-shaped holes 301, and the strip-shaped holes 301 are one-to-one corresponding to the handle 2, the scale 102 and the button 103. In the embodiment, the number of the strip-shaped holes 301 is four, and the four strip-shaped holes 301 are corresponding to the two handles 2, the scale 102 and the button 103 respectively; the span of each strip-shaped hole 301 corresponds to the moving range of the handle 2, the scale 102 or the button 103 corresponding thereto, so that through the strip-shaped hole 301, the operation of the button 103 is not affected, the scale 102 is always exposed, and the pointer reading is not affected. On the other hand, the handle 2, the scale 102 and the button 103 will not interfere with the barrel 3 when moving with the rebound hammer 1.
[0035] In the embodiment, the outer side of the end of the barrel 3 away from the impact rod 101 is provided with an outer threaded section 304, and one end of the strip-shaped hole 301 extends to the edge of the end of the barrel 3, and divides the outer threaded section 304. The other end of the strip-shaped hole 301 is located in the middle of the barrel 3; the barrel 3 is connected with the threaded end cover 7 through the outer threaded section 304, and the inner side of the threaded end cover 7 is provided with an inner thread, which can be detachably connected with the outer threaded section 304. In this way, after the threaded end cover 7 is unscrewed, the rebound hammer 1 can be pulled out from the inside of the barrel 3.
[0036] The end of the barrel 3 close to the impact rod 101 is vertically connected with the annular plate 302, and the inner ring edge of the annular plate 302 corresponds to and is connected with the barrel 3; the annular plate 302 can increase the contact area with the concrete surface; a plurality of through holes are uniformly distributed on the circumference of the annular plate 302, the through holes can reduce the weight of the annular plate 302, and the part of the concrete surface blocked by the annular plate 302 can be observed.
[0037] When detecting, first, the annular plate 302 at the end of the barrel 3 is abutted and contacted on the outer side of the concrete surface, the outer side of the threaded end cover 7 can be abutted by the body to ensure that the annular plate 302 is abutted with the concrete, so that the barrel 3 and the rebound hammer 1 are always perpendicular to the concrete surface. The handle 2 is driven by two hands, so that the rebound hammer 1 moves along the inner side of the barrel 3 to the concrete, and the impact rod 101 can be retracted.
[0038] In order to make the bulleting rod 101 correspond to the detected point on the concrete surface accurately, the barrel 3 is provided with a plurality of sight holes 303 on the side wall near the one end of the bulleting rod 101. In the embodiment, the extending direction of the sight hole 303 is the axial direction of the barrel 3, the number of the sight hole 303 is six, and the sight holes 303 are circumferentially distributed on the side wall of the barrel 3, so that the concrete surface inside the end of the barrel 3 can be observed during operation, and then the bulleting rod 101 can correspond to the detected point.
[0039] In the embodiment, the handle 2 is connected with the guide rod 4 on the side of the annular plate 302, the number of the guide rod 4 is two, the barrel 3 is provided with two guide tubes 5 outside and symmetrically corresponding to the two guide rods 4, and the guide rod 4 slides along the inside of the corresponding guide tube 5. Specifically, the barrel 3 is provided with two protrusions supporting the end of the guide tube 5, and the two protrusions correspond to the two guide tubes 5 respectively.
[0040] In the embodiment, two springs 6 are arranged, and the two groups of guide rods 4 and guide tubes 5 are located inside the two springs 6 respectively. The two ends of the spring 6 abut against the protrusion and the handle 2 respectively, when the rebound instrument 1 and the handle 2 are moved, the guide rod 4 moves towards the inside of the guide tube 5, and the handle 2 compresses the spring 6, so that the annular plate 302 does not need to be attached to the concrete surface by the body during operation, and the relative action of the spring 6 can make the barrel 3 and the annular plate 302 always attached to the concrete surface.
[0041] Finally, it should be noted that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified without creative labor, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A non-destructive testing device for reinforced concrete structures, comprising a rebound hammer (1) comprising a striking lever (101), a scale (102) and a push button (103); characterized in that, The rebound hammer (1) is connected with a handle (2) on the outer ring side; further comprising a cylinder (3) sleeved on the outside of the rebound hammer (1), the side wall of the cylinder (3) is provided with a plurality of axial strip-shaped holes (301), the strip-shaped holes (301) are respectively corresponding to the handle (2), the scale (102) and the button (103).
2. The apparatus for non-destructive testing of reinforced concrete structures according to claim 1, characterized in that, The cylinder (3) is vertically connected with an annular plate (302) near one end of the elastic rod (101), the inner ring edge of the annular plate (302) is corresponding and connected with the cylinder (3).
3. The apparatus for non-destructive testing of reinforced concrete structures according to claim 1, characterized in that, The side wall of the cylinder (3) is provided with a plurality of sight holes (303) near one end of the elastic rod (101).
4. The apparatus for non-destructive testing of reinforced concrete structures according to claim 1, characterized in that, The outer side of the cylinder (3) away from one end of the elastic rod (101) is provided with an outer thread section (304), the strip-shaped holes (301) all extend to the edge of the cylinder (3) at this end; the cylinder (3) is connected with a threaded end cover (7) through the outer thread section (304).
5. The apparatus for non-destructive testing of reinforced concrete structures according to claim 1, characterized in that, The number of the handle (2) is two, the two handles (2) are symmetrical to the two sides of the rebound hammer (1).
6. The apparatus for non-destructive testing of reinforced concrete structures according to claim 1 or 5, characterized in that, The handle (2) is connected with a guide rod (4) on one side, the outer side of the cylinder (3) is provided with a guide tube (5) corresponding to the guide rod (4), the guide rod (4) slides along the inner side of the guide tube (5).
7. The apparatus for non-destructive testing of reinforced concrete structures according to claim 6, characterized in that, Further comprising a spring (6), the guide rod (4) and the guide tube (5) are located inside the spring (6).