A concrete rebound testing device

Abstract

The utility model relates to building detection equipment technical field discloses a kind of concrete rebound detection devices, including rebound apparatus body and handheld pole, the handheld pole one side is fixedly installed with the support arm of symmetrical arrangement, the support arm end position is fixedly connected with firm support plate, the rebound apparatus body is arranged between two support arms, the rebound apparatus body one side is fixedly connected with connecting slide bar, rectangular slide groove is set up in the middle of handheld pole, the connecting slide bar is slidably arranged on the inner wall of rectangular slide groove, locating groove is set up on the connecting slide bar, mounting shell is fixedly connected on the handheld pole, locating block is slidably arranged in the inner wall of mounting shell, the locating block is compatible with locating groove. The utility model makes firm support plate contact with concrete wall surface, so that rebound apparatus body can be perpendicular to concrete wall surface stably, avoid the reaction force of concrete wall surface to weight inside rebound apparatus body reduce, ensure the accuracy of detection.

Description

Technical Field

[0001] This utility model belongs to the technical field of building testing equipment, specifically, it relates to a concrete rebound testing device. Background Technology

[0002] A concrete rebound hammer is used to test the compressive strength of concrete and is a widely used instrument for on-site testing of concrete compressive strength. The basic principle of a rebound hammer is that a connecting spring drives a hammer, which strikes a spring rod perpendicular to the concrete surface with constant kinetic energy. This causes local deformation of the concrete and absorbs some energy, while the rest is converted into the rebound kinetic energy of the hammer. When all the rebound kinetic energy is converted into potential energy, the hammer rebounds to its maximum distance. The instrument displays the maximum rebound distance of the hammer as a rebound value (the ratio of the maximum rebound distance to the initial length of the connecting spring).

[0003] Currently, rebound hammers are generally used by workers who hold them directly. Due to the user's operating conditions and experience, the rebound hammer may not be able to maintain a perpendicular position to the wall, which reduces the reaction force of the concrete wall on the hammer inside the rebound hammer. This causes errors between the rebound hammer's test data and the actual data, thus affecting the accuracy of the test.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] To address the problem that rebound hammers may not be able to maintain a perpendicular position to the wall, resulting in a reduced reaction force from the concrete wall to the internal hammer and affecting testing accuracy, the basic concept of this utility model is as follows:

[0006] A concrete rebound testing device includes a rebound hammer body and a handheld rod. Symmetrically arranged support arms are fixedly installed on one side of the handheld rod, and a stabilizing support plate is fixedly connected to the end of each support arm. The rebound hammer body is positioned between the two support arms, and a connecting slide rod is fixedly connected to one side of the rebound hammer body. A rectangular groove is formed in the middle of the handheld rod, and the connecting slide rod is slidably disposed on the inner wall of the rectangular groove. A positioning groove is formed on the connecting slide rod, and a mounting shell is fixedly connected to the handheld rod. A positioning block is slidably disposed on the inner wall of the mounting shell, and the positioning block is adapted to the positioning groove.

[0007] In a preferred embodiment of this utility model, an L-shaped support base is fixedly provided at the bottom of the handheld rod, and a guide groove is provided on the support base.

[0008] In a preferred embodiment of the present invention, a guide seat is fixedly connected to the bottom outer wall of the rebounder body, and the guide seat is slidably connected to the inner wall of the guide groove.

[0009] In a preferred embodiment of this utility model, a push-pull plate is fixedly connected to the end of the connecting slide rod.

[0010] In a preferred embodiment of this utility model, a connecting spring is installed on the inner wall of the top of the mounting housing, and one end of the connecting spring is connected to the outer wall of one side of the positioning block.

[0011] In a preferred embodiment of this utility model, a movable opening is provided on one side of the mounting housing, and a lifting rod is slidably connected to the inner wall of the movable opening. The lifting rod is fixedly connected to the outer wall of one side of the positioning block.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention, through its handheld handle, support arm, and stabilizing plate, allows the operator to grip the handle and, with the support arm, bring the stabilizing plate into contact with the concrete wall when testing is required. This ensures the rebound hammer body is stably perpendicular to the concrete wall, preventing a reduction in the reaction force of the concrete wall on the hammer inside the rebound hammer body and guaranteeing testing accuracy. Then, the limiting mechanism on the connecting slide rod is released, pushing the rebound hammer body towards the concrete wall so that the impact rod at the end of the rebound hammer body contacts the concrete wall. Finally, the rebound hammer body is opened for operation, enabling the testing of the compressive strength of the concrete wall.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of a concrete rebound testing device according to the present invention.

[0017] Figure 2 This is a schematic diagram of the connection structure between the rebound hammer body and the handheld rod of a concrete rebound testing device according to this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the hand handle and mounting shell of a concrete rebound testing device according to this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the hand handle and connecting slide bar of the concrete rebound testing device of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the handheld rod and the stabilizing support plate of the concrete rebound testing device of this utility model.

[0021] In the diagram: 1. Rebound hammer body; 2. Hand handle; 3. Support base; 4. Guide seat; 5. Support arm; 6. Stabilizing support plate; 7. Connecting slide bar; 8. Push-pull plate; 9. Mounting housing; 10. Rectangular slide groove; 11. Positioning block; 12. Positioning groove; 13. Connecting spring; 14. Movable opening; 15. Lifting rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0023] like Figures 1 to 5 As shown

[0024] A concrete rebound testing device includes a rebound hammer body 1 and a handheld rod 2. An L-shaped support base 3 is fixedly mounted at the bottom of the handheld rod 2, and a guide groove is provided on the support base 3. A guide seat 4 is fixedly connected to the outer wall of the bottom of the rebound hammer body 1, and the guide seat 4 is slidably connected to the inner wall of the guide groove. Symmetrically arranged support arms 5 are fixedly mounted on one side of the handheld rod 2, and a stabilizing plate 6 is fixedly connected to the end of each support arm 5. The rebound hammer body 1 is positioned between the two support arms 5. When the operator holds the handheld rod 2, the stabilizing plate 6 contacts the concrete wall, making the rebound hammer body 1 stably perpendicular to the concrete wall. A connecting slide rod 7 is fixedly connected to one side of the rebound hammer body 1, and a push-pull plate 8 is fixedly connected to the end of the connecting slide rod 7. A rectangular slide groove 10 is provided in the middle of the handheld rod 2, and the connecting slide rod 7 is slidably mounted on the inner wall of the rectangular slide groove 10. A positioning groove 12 is provided on the connecting slide rod 7. An installation shell 9 is fixedly connected to the handheld rod 2, and a positioning block 11 is slidably mounted on the inner wall of the installation shell 9. The positioning block 11 is positioned in conjunction with a positioning plate 8. The mounting housing 9 is fitted with a slot 12. A connecting spring 13 is installed on the inner wall of the top of the mounting housing 9. One end of the connecting spring 13 is connected to the outer wall of one side of the positioning block 11. A movable opening 14 is provided on one side of the mounting housing 9. A lifting rod 15 is slidably connected to the inner wall of the movable opening 14. The lifting rod 15 is fixedly connected to the outer wall of one side of the positioning block 11. After the rebound hammer body 1 is perpendicular to the concrete wall, the lifting rod 15 is pulled to move it. The lifting rod 15 drives the positioning block 11 to move until the positioning block 11 disengages from the positioning slot 12. Release the limiting position of the connecting slide rod 7. After the positioning block 11 is disengaged from the positioning groove 12, press the push-pull plate 8 to move it, so that the push-pull plate 8 drives the connecting slide rod 7 to move. The connecting slide rod 7, together with the set support seat 3, guide groove and guide seat 4, drives the rebound hammer body 1 to move until the impact rod at the end of the rebound hammer body 1 contacts the concrete wall surface. Then hold the rebound hammer body 1 and open the rebound hammer body 1 to start working, so as to realize the detection of the compressive strength of the concrete wall surface.

[0025] The implementation principle of the concrete rebound testing device in this embodiment is as follows: In specific use, the operator holds the hand lever 2, contacts the stabilizing support plate 6 with the concrete wall surface, so that the rebound hammer body 1 is perpendicular to the concrete wall surface, and then pulls the lifting rod 15 to move it. The lifting rod 15 drives the positioning block 11 to move until the positioning block 11 disengages from the positioning groove 12, releasing the limit on the connecting slide rod 7. After the positioning block 11 disengages from the positioning groove 12, the push-pull plate 8 is pressed to move it, so that the push-pull plate 8 drives the connecting slide rod 7 to move. The connecting slide rod 7, together with the support base 3, guide groove and guide seat 4, drives the rebound hammer body 1 to move until the rebound hammer body 1 moves. The impact rod at the end of the rebound hammer body 1 contacts the concrete wall surface. Then, holding the rebound hammer body 1, the rebound hammer body 1 is opened for operation, so that the spring inside the rebound hammer body 1 drives the hammer. The hammer strikes the impact rod that is in perpendicular contact with the concrete surface with constant kinetic energy, causing local concrete deformation and absorbing part of the energy. The other part of the energy is converted into the rebound kinetic energy of the hammer. When all the rebound kinetic energy is converted into potential energy, the hammer rebounds to the maximum distance. The rebound hammer body 1 displays the maximum rebound distance of the hammer as the rebound value (the ratio of the maximum rebound distance to the initial length of the spring) on ​​the rebound hammer body 1, thus realizing the detection of the compressive strength of the concrete wall surface.

Claims

1. A concrete rebound detector device comprising a rebound hammer body (1) and a hand-held stem (2), characterized in that, A symmetrically arranged support arm (5) is fixedly installed on one side of the handheld rod (2). A stabilizing support plate (6) is fixedly connected to the end of the support arm (5). The rebounder body (1) is located between the two support arms (5). A connecting slide rod (7) is fixedly connected to one side of the rebounder body (1). A rectangular slide groove (10) is opened in the middle of the handheld rod (2). The connecting slide rod (7) is slidably arranged on the inner wall of the rectangular slide groove (10). A positioning groove (12) is opened on the connecting slide rod (7). An installation shell (9) is fixedly connected to the handheld rod (2). A positioning block (11) is slidably arranged on the inner wall of the installation shell (9). The positioning block (11) is adapted to the positioning groove (12).

2. A concrete rebound testing device according to claim 1, wherein, The bottom of the handheld lever (2) is fixedly provided with an L-shaped support base (3), and the support base (3) is provided with a guide groove.

3. A concrete rebound testing device according to claim 2, wherein, The bottom outer wall of the rebounder body (1) is fixedly connected to a guide seat (4), and the guide seat (4) is slidably connected to the inner wall of the guide groove.

4. The concrete rebound testing device of claim 1, wherein, A push-pull plate (8) is fixedly connected to the end of the connecting slide rod (7).

5. The concrete rebound testing device of claim 1, wherein, A connecting spring (13) is installed on the inner top wall of the mounting housing (9), and one end of the connecting spring (13) is connected to the outer wall of the positioning block (11) on one side.

6. A concrete rebound testing device according to claim 1, wherein, The mounting housing (9) has an opening (14) on one side, and a lifting rod (15) is slidably connected to the inner wall of the opening (14). The lifting rod (15) is fixedly connected to the outer wall of the positioning block (11) on one side.

Images