Concrete rebound apparatus

Abstract

The utility model discloses a concrete rebound apparatus, which comprises a rebound apparatus main body and a support frame, the rebound apparatus main body comprises a shell, a dial and a striking rod, the dial is arranged on the side surface of the shell, one end of the striking rod is arranged in the shell, and the other end of the striking rod penetrates through the shell and is arranged on the outer side of the lower end of the shell; the supporting frame comprises a telescopic sleeve, a telescopic block and a telescopic spring, the telescopic sleeve and the telescopic block are each of a hollow structure with the lower portion open, the telescopic sleeve is connected with the telescopic block through the telescopic spring to form a telescopic structure, an open hole is formed in the upper end of the telescopic sleeve, and the telescopic sleeve is detachably installed at the lower end of the shell through the open hole. According to the device, the support frame is arranged, so that the support frame and the rebound apparatus main body are combined and spliced during testing, the rebound apparatus main body can be supported in an auxiliary manner through the support frame, the bouncing rod is ensured to be perpendicular to the concrete surface at a measuring point, inclination is prevented, the measuring error is effectively reduced, and the measuring process is convenient and rapid.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and in particular to a concrete rebound hammer. Background Technology

[0002] A concrete rebound hammer is a widely used testing tool in construction engineering for assessing concrete strength. It calculates concrete strength by measuring the height to which a hammer bounces off the concrete surface. Strength tests using a concrete rebound hammer can be performed directly on the construction site without damaging the concrete structure, allowing operators to complete the tests quickly and conveniently.

[0003] When using a concrete rebound hammer, the operator must select a suitable measurement location and ensure that the surface at the measurement location is flat and clean. Typically, to ensure measurement accuracy, the operator needs to define multiple measurement zones at the measurement location and use tools such as a marker to draw a grid in each zone, creating 12 or 16 measurement points. After testing each measurement point separately, the data is recorded and related calculations are performed to determine the concrete strength. Furthermore, to reduce errors, the impact rod at the front of the impact device must be perpendicular to the concrete surface at the measurement point during measurement.

[0004] However, traditional concrete rebound hammers are generally designed as cylindrical structures with a narrow front diameter. For example, invention patent CN114264563A discloses a 3.503 Joule concrete rebound hammer, which includes a shell, an impact rod, an impact hammer, and an impact spring. The impact rod has a blind hole and a buffer spring. When the operator holds the concrete rebound hammer and the impact rod contacts the concrete surface, it is difficult to ensure that the impact rod is perpendicular to the concrete surface, which easily leads to measurement errors. Therefore, there is a need in the field of concrete testing technology to propose a concrete rebound hammer that can reduce the measurement error in concrete strength testing. Utility Model Content

[0005] In view of the above-mentioned prior art, the present invention provides a concrete rebound hammer, which mainly solves the technical problem of how to reduce the measurement error of concrete strength testing.

[0006] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0007] A concrete rebound hammer includes a rebound hammer body and a support frame. The rebound hammer body includes a housing, a scale, and an impact rod. The scale is disposed on the side of the housing. One end of the impact rod is disposed inside the housing, and the other end of the impact rod passes through the housing and is disposed on the outer side of the lower end of the housing. The support frame includes a telescopic sleeve, a telescopic block, and a telescopic spring. Both the telescopic sleeve and the telescopic block are hollow and open at the bottom. The telescopic sleeve is connected to the telescopic block through the telescopic spring to form a telescopic structure. The upper end of the telescopic sleeve is provided with an opening, and the telescopic sleeve is detachably installed at the lower end of the housing through the opening.

[0008] Preferably, a limiting ring is fixedly connected to the lower end of the housing, and the diameter of the limiting ring is larger than the diameter of the opening.

[0009] Preferably, both the telescopic sleeve and the telescopic block are configured as rectangular structures with a square base.

[0010] Preferably, a rubber sleeve is provided at the upper end of the housing.

[0011] Preferably, the upper end of the opening is provided with a groove that cooperates with the limiting ring.

[0012] Preferably, the edge of the limiting ring is provided with a locking block, and the inner wall of the slot is provided with a locking groove that cooperates with the locking block.

[0013] Preferably, the telescopic sleeve and the telescopic block are provided with a first through hole at each of their four corners, and the telescopic block is provided with a second through hole at each of its four corners. The first through hole and the second through hole are connected, and a marker pen is provided in the first through hole.

[0014] Preferably, the upper end of the marker is connected to a threaded rod, and the first through hole is provided with a thread that mates with the threaded rod.

[0015] The beneficial effects of this utility model are as follows: By setting the support frame, during testing, the support frame and the main body of the rebound hammer can be combined and spliced. The support frame can provide auxiliary support for the main body of the rebound hammer, ensuring that the impact rod is perpendicular to the concrete surface at the test point. When the rebound hammer is being tested, the operator presses the impact rod against the concrete surface at the test point and pushes the housing, causing the impact rod to continuously retract into the housing under force. At this time, the telescopic block contacts the concrete surface at the test point and continuously retracts into the telescopic sleeve as the impact rod retracts. When the bottom of the telescopic block is in close contact with the concrete surface at the test point, the impact rod is supported by the telescopic sleeve and the telescopic block, ensuring that it is perpendicular to the concrete surface at the test point.

[0016] In summary, by setting up the support frame, this application ensures that the impact rod is perpendicular to the concrete surface of the measuring point during measurement, preventing tilting, effectively reducing measurement errors, and making the measurement process convenient and quick. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a concrete rebound hammer support frame in a separated state according to an embodiment of this application;

[0018] Figure 2 This is a structural schematic diagram of the installation state of a concrete rebound hammer support frame in an embodiment of this application;

[0019] Figure 3 This is an exploded view of the support frame in the embodiments of this application;

[0020] Figure 4 This is a structural schematic diagram of the support frame during mesh drawing in the embodiments of this application;

[0021] Explanation of icon numbers:

[0022] 1. Rebound hammer body; 2. Support frame; 3. Limiting ring;

[0023] 101. Housing; 102. Dial; 103. Activation lever; 104. Rubber sleeve;

[0024] 201. Telescopic sleeve; 202. Telescopic block; 203. Telescopic spring; 204. Opening; 205. Slot; 206. Locking block; 207. Locking slot; 208. First through hole; 209. Second through hole; 210. Marker pen; 211. Threaded rod. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0026] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Example 1

[0028] See attached document Figure 1-3This application provides a concrete rebound hammer, including a rebound hammer body 1 and a support frame 2. The rebound hammer body 1 includes a housing 101, a scale 102, and an impact rod 103. The scale 102 is disposed on the side of the housing 101. One end of the impact rod 103 is disposed inside the housing 101, and the other end of the impact rod 103 penetrates the housing 101 and is disposed on the outer side of the lower end of the housing 101. The support frame 2 includes a telescopic sleeve 201, a telescopic block 202, and a telescopic spring 203. Both the telescopic sleeve 201 and the telescopic block 202 are hollow and open at the bottom. The telescopic sleeve 201 is connected to the telescopic block 202 through the telescopic spring 203 to form a telescopic structure. The upper end of the telescopic sleeve 201 is provided with an opening 204, and the telescopic sleeve 201 is detachably installed on the lower end of the housing 101 through the opening 204. In this embodiment, the rebound hammer body 1 is set as an HT255 series rebound hammer. It should be understood that the rebound hammer body 1 can also be set as other commonly used rebound hammers in the field whose structure can cooperate with the support frame 2. By setting the support frame 2, this device can combine and splice the support frame 2 with the rebound hammer body 1 during testing. The support frame 2 can provide auxiliary support for the rebound hammer body 1, ensuring that the impact rod 103 is perpendicular to the concrete surface at the measuring point. When the rebound hammer body 1 is used for testing, the operator places the impact rod 103 against the concrete surface at the measuring point and pushes the housing 101, causing the impact rod 103 to continuously retract into the housing 101 under force. At this time, the telescopic block 202 contacts the concrete surface at the measuring point and continuously retracts into the telescopic sleeve 201 as the impact rod 103 retracts. The telescopic block 202 and the telescopic sleeve 201 are designed so that even when the impact rod 103 retracts to its limit, the telescopic block 202 and the telescopic sleeve 201 can still retract further. When the bottom of the telescopic block 202 is in close contact with the concrete surface at the measuring point, the impact rod 103 is supported by the telescopic sleeve 201 and the telescopic block 202, ensuring that it is perpendicular to the concrete surface at the measuring point. In summary, this device, by setting the support frame 2, ensures that the impact rod 103 is perpendicular to the concrete surface at the measuring point during measurement, preventing tilting, effectively reducing measurement errors, and making the measurement process convenient and quick.

[0029] Specifically, a limiting ring 3 is fixedly connected to the lower end of the housing 101, and the diameter of the limiting ring 3 is larger than the diameter of the opening 204. By setting the limiting ring 3, this device can ensure that when the support frame 2 is installed to the lower end of the rebound hammer body 1 through the opening 204, the installation position and angle are accurate, thereby further ensuring that the impact rod 103 is perpendicular to the concrete surface of the measuring point during measurement, and improving the reliability of this device.

[0030] Specifically, both the telescopic sleeve 201 and the telescopic block 202 are rectangular structures with a square bottom surface. The square bottom surface of both the telescopic sleeve 201 and the telescopic block 202 allows the telescopic block 202 to fit more tightly against the concrete surface at the measuring point. Simultaneously, the square bottom surface allows the telescopic block 202 to align with the grid drawn at the measuring point, thereby making the measuring point contacted by the impact rod 103 more accurate and the test more standardized.

[0031] Specifically, a rubber sleeve 104 is provided at the upper end of the housing 101. The rubber sleeve 104 can reduce slippage when the operator pushes the instrument and protect the operator's hands.

[0032] Specifically, the upper end of the opening 204 is provided with a slot 205 that cooperates with the limiting ring 3. The slot 205 allows the upper end of the support frame 2 to fit into the limiting ring 3, thereby improving the stability of the support frame 2 when mounted on the rebound device.

[0033] Specifically, the limiting ring 3 has a locking block 206 on its edge, and the slot 205 has a groove 207 on its inner wall that mates with the locking block 206. Through the cooperation of the locking block 206 and the groove 207, this device can further improve the accuracy of the angle and position of the support frame 2 during installation, thereby ensuring that the impact rod 103 is perpendicular to the concrete surface of the measuring point during measurement, further improving the reliability of the device.

[0034] Example 2

[0035] See attached document Figure 3-4 The difference between this embodiment and Embodiment 1 is that each of the four corners of the telescopic sleeve 201 and the telescopic block 202 is provided with a first through hole 208, and each of the four corners of the telescopic block 202 is provided with a second through hole 209. The first through hole 208 and the second through hole 209 communicate with each other, and a marker pen 210 is disposed in the first through hole 208. The length of the marker pen 210 is set to be longer than the height of the telescopic sleeve 201, but when the spring rod 103 is retracted to its limit, the length of the marker pen 210 is insufficient to extend out of the second through hole 209. By setting the marker pen 210, this device allows the support frame 2 to be used to draw a grid and determine the measuring points when it is disassembled, making the confirmation of the measuring points more convenient and standardized.

[0036] Specifically, the upper end of the marker 210 is connected to a threaded rod 211, and the first through hole 208 is provided with a thread that mates with the threaded rod 211. The engagement of the threaded rod 211 with the first through hole 208 allows the marker 210 to be easily disassembled, installed, and replaced, and the length of the marker 210 extending from the first through hole 208 can be adjusted, preventing damage to the marker 210 and improving the convenience of the device.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A concrete rebound hammer, characterized in that, The device includes a rebound hammer body (1) and a support frame (2). The rebound hammer body (1) includes a housing (101), a scale (102), and a striking rod (103). The scale (102) is disposed on the side of the housing (101). One end of the striking rod (103) is disposed inside the housing (101), and the other end of the striking rod (103) penetrates the housing (101) and is disposed on the outer side of the lower end of the housing (101). The support frame (2) includes a telescopic sleeve (2). 01) Telescopic block (202) and telescopic spring (203), the telescopic sleeve (201) and the telescopic block (202) are both set as hollow and open at the bottom. The telescopic sleeve (201) is connected to the telescopic block (202) through the telescopic spring (203) to form a telescopic structure. The upper end of the telescopic sleeve (201) is provided with an opening (204). The telescopic sleeve (201) is detachably installed at the lower end of the housing (101) through the opening (204).

2. A concrete rebound hammer according to claim 1, characterized in that, A limiting ring (3) is fixedly connected to the lower end of the housing (101), and the diameter of the limiting ring (3) is larger than the diameter of the opening (204).

3. A concrete rebound hammer according to claim 2, characterized in that, Both the telescopic sleeve (201) and the telescopic block (202) are configured as rectangular structures with a square bottom surface.

4. A concrete rebound hammer according to claim 1, characterized in that, A rubber sleeve (104) is provided at the upper end of the housing (101).

5. A concrete rebound hammer according to claim 3, characterized in that, The upper end of the opening (204) is provided with a slot (205) that cooperates with the limiting ring (3).

6. A concrete rebound hammer according to claim 5, characterized in that, The limiting ring (3) has a locking block (206) on its edge, and the slot (205) has a slot (207) on its inner wall that cooperates with the locking block (206).

7. A concrete rebound hammer according to claim 6, characterized in that, The telescopic sleeve (201) and the telescopic block (202) are provided with first through holes (208) at their four corners, and the telescopic block (202) is provided with second through holes (209) at their four corners. The first through holes (208) and the second through holes (209) are connected, and a marker pen (210) is provided in the first through hole (208).

8. A concrete rebound hammer according to claim 7, characterized in that, The upper end of the marker (210) is connected to a threaded rod (211), and the first through hole (208) is provided with a thread that mates with the threaded rod (211).

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