A mortar rebound hammer for building detection

Abstract

This utility model discloses a mortar rebound hammer for building testing, relating to the field of building testing technology. It includes: a rebound shell; a rebound assembly disposed inside the rebound shell for rebound testing of the building surface; an adjustment assembly disposed at the bottom outer circumference of the rebound shell for adjusting the angle between the rebound shell and the building surface; and an auxiliary assembly disposed on one side of the adjustment assembly for assisting in fixing the rebound shell, thereby improving the stability of the testing process. By incorporating the adjustment assembly, this utility model enables precise adjustment of the rebound shell angle, ensuring that the impact direction of the rebound assembly is always perpendicular to the tested building surface. This reduces rebound value errors caused by angular deviations and improves the accuracy and repeatability of mortar strength measurement.

Description

Technical Field

[0001] This utility model relates to the field of building inspection technology, specifically to a mortar rebound hammer for building inspection. Background Technology

[0002] In building construction quality inspection, mortar strength is one of the important indicators for evaluating the mechanical properties and durability of masonry structures. Traditional mortar strength testing methods mainly include destructive testing methods such as core sampling and push-out methods. Although these methods can obtain relatively accurate strength values, they have disadvantages such as complex operation, low testing efficiency, and large construction interference. Furthermore, the testing process can damage the tested components, affecting their structural integrity and subsequent functionality.

[0003] With the continuous development of non-destructive testing technology, the rebound method has been gradually applied to the rapid assessment of mortar strength in building engineering due to its advantages such as fast testing speed, simple operation, and no structural damage. This method typically uses a spring impact hammer in a rebound hammer to strike the mortar surface, obtains the rebound value, and estimates its mechanical properties by combining the empirical relationship between the rebound value and the compressive strength of the mortar.

[0004] However, existing handheld mortar rebound hammers struggle to ensure the impact direction is perpendicular to the surface being tested when inspecting building facades, ceilings, or non-horizontal structures. This can lead to significant deviations in rebound values, affecting the accuracy and repeatability of test results. Furthermore, the instruments exhibit poor stability during field use, frequently slipping or tilting, impacting operational reliability and reducing overall testing efficiency and ease of use.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a mortar rebound hammer for building testing, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A mortar rebound hammer for building inspection includes: a rebound shell; a rebound assembly disposed inside the rebound shell for rebound testing of the building surface; an adjustment assembly disposed at the bottom of the outer circumference of the rebound shell for adjusting the angle between the rebound shell and the building surface; and an auxiliary assembly disposed on one side of the adjustment assembly for assisting in fixing the rebound shell to improve the stability of the testing process.

[0009] Furthermore, in order to achieve impact testing on the surface of building mortar and improve testing efficiency, the rebound assembly includes a compression spring set inside the rebound shell on one side, a guide flange set on one side of the compression spring, a central guide rod set on one side of the guide flange, a spring hammer that cooperates with the rebound shell on one side of the central guide rod, a spring rod set on one side of the spring hammer, and a limit ring set on the outer circumference of the spring rod. The limit ring and the spring hammer are cooperated by a spring tension spring.

[0010] Furthermore, in order to reduce the rebound value error caused by angular deviation and improve the accuracy and repeatability of mortar strength measurement, the adjustment component includes an adjustment seat set at the bottom of the outer side of the rebound shell, a connecting seat set at the bottom of the adjustment seat, and the connecting seat and the adjustment seat are connected by a rotating shaft; a drive motor connected to the rotating shaft is set at one end of the connecting seat, an angle sensor is set on one side of the adjustment seat, and a control panel is set on the side of the connecting seat near the drive motor.

[0011] Furthermore, to ensure that the impact direction is not affected by external interference and to improve the stability and reliability of the detection data, the auxiliary component includes a telescopic member set on one side of the connecting seat. An auxiliary plate is set on one side of the telescopic member, and the auxiliary plate is connected to the connecting seat by two sets of telescopic springs. The telescopic member includes several auxiliary frames set on one side of the connecting seat. A fixing rod is set inside the auxiliary frame. Two sets of first connecting rods are set at the top of the outer circumference of the fixing rod, and the bottom end of one set of first connecting rods cooperates with the top end of the other set of first connecting rods. Two sets of second connecting rods are set at the bottom of the outer circumference of the fixing rod, and the bottom end of one set of second connecting rods cooperates with the top end of the other set of second connecting rods. The second connecting rods and the first connecting rods are connected by a connecting shaft.

[0012] Furthermore, in order to generate lateral resistance and prevent slippage during the testing process, several anti-slip strips are provided on the side of the auxiliary plate away from the telescopic component, and the anti-slip strips have a wave-like structure.

[0013] Furthermore, to protect the display screen from damage caused by wear or external factors during long-term use, and to ensure the accuracy of readings and the service life of the rebound spring, a fixing groove is provided at the top of the outer circumference of the rebound shell. The display screen is installed on one side of the inner bottom end of the fixing groove, and a protective shell that mates with the display screen is installed on the other side of the inner bottom end of the fixing groove. An insert that mates with the fixing groove is provided on one side of the protective shell. The insert includes a groove on one side of the protective shell, a limit spring is provided on one side of the groove, a moving rod is provided on one side of the limit spring, and a sliding groove that mates with the moving rod is provided at the top of the groove. The insert also includes a limiting groove on one side of the inner wall of the groove that mates with the moving rod.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By setting an adjustment component, this utility model can achieve precise adjustment of the rebound shell angle, so that the impact direction of the rebound component is always perpendicular to the surface of the building being tested, thereby reducing the rebound value error caused by angle deviation and improving the accuracy and repeatability of mortar strength measurement.

[0016] 2. By setting auxiliary components, this utility model can support and stabilize the rebound shell, preventing the rebound hammer from shaking, shifting or sliding during the testing process, thereby ensuring that the impact direction is not disturbed by external factors and improving the stability and reliability of the test data. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a mortar rebound hammer for building testing according to an embodiment of the present utility model;

[0019] Figure 2 This is one of the cross-sectional views of a mortar rebound hammer for building testing according to an embodiment of the present utility model;

[0020] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 4 This is a second cross-sectional view of a mortar rebound hammer for building testing according to an embodiment of the present utility model;

[0022] Figure 5 This is one of the partial schematic diagrams of a mortar rebound hammer for building testing according to an embodiment of the present utility model;

[0023] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0024] Figure 7 This is a second partial schematic diagram of a mortar rebound hammer for building testing according to an embodiment of the present utility model;

[0025] Figure 8 yes Figure 7 A magnified view of a section at point C.

[0026] In the picture:

[0027] 1. Rebound housing; 2. Rebound assembly; 201. Compression spring; 202. Guide flange; 203. Central guide rod; 204. Impact hammer; 205. Impact rod; 206. Limiting ring; 207. Impact tension spring; 3. Adjustment assembly; 301. Adjustment seat; 302. Connecting seat; 303. Rotating shaft; 304. Drive motor; 4. Auxiliary assembly; 401. Telescopic component; 4011. Auxiliary frame; 4012. Fixing rod; 4013, First connecting rod; 4014, Second connecting rod; 4015, Connecting shaft; 402, Auxiliary plate; 403, Telescopic spring; 5, Angle sensor; 6, Control panel; 7, Anti-slip strip; 8, Fixing groove; 9, Display screen; 10, Protective shell; 11, Insert; 1101, Groove; 1102, Limiting spring; 1103, Moving rod; 1104, Slide groove; 1105, Limiting groove; 12, Acceleration sensor. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to an embodiment of the present invention, a mortar rebound hammer for building inspection is provided.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-8 As shown, the mortar rebound hammer for building inspection according to an embodiment of the present invention includes: a rebound shell 1; a rebound component 2 disposed inside the rebound shell 1 for rebound testing of the building surface; an adjustment component 3 disposed at the bottom of the outer circumference of the rebound shell 1 for adjusting the angle between the rebound shell 1 and the building surface; and an auxiliary component 4 disposed on one side of the adjustment component 3 for assisting in fixing the rebound shell 1 to improve the stability of the testing process.

[0031] By utilizing the above-described technical solution of this utility model, the angle of the rebound shell 1 can be precisely adjusted by setting the adjustment component 3, ensuring that the impact direction of the rebound component 2 is always perpendicular to the surface of the building being tested. This reduces rebound value errors caused by angle deviations and improves the accuracy and repeatability of mortar strength measurement. The auxiliary component 4 provides support and stability to the rebound shell 1, preventing the rebound hammer from shaking, shifting, or sliding during testing, thus ensuring that the impact direction is not disturbed by external factors and improving the stability and reliability of the test data.

[0032] In one embodiment, the rebound assembly 2 includes a compression spring 201 disposed inside the rebound housing 1 on one side. A guide flange 202 is disposed on one side of the compression spring 201. A central guide rod 203 is disposed on one side of the guide flange 202. A spring hammer 204 cooperating with the rebound housing 1 is disposed on one side of the central guide rod 203. A spring rod 205 is disposed on one side of the spring hammer 204. A limit ring 206 is disposed on the outer circumference of the spring rod 205. The limit ring 206 and the spring hammer 204 are cooperating through a spring tension spring 207, thereby realizing impact detection on the surface of building mortar and improving detection efficiency.

[0033] The working principle of the rebound assembly 2 is as follows: When the operator applies pressure to the rebound hammer, the impact rod 205 moves inward, compressing the impact spring 207, which in turn drives the impact hammer 204 to move backward along the central guide rod 203. This causes the compression spring 201 to gradually store energy and compress. At the same time, under the constraint of the guide flange 202, the movement direction of the impact hammer 204 is kept stable. When the compression displacement of the compression spring 201 reaches the preset value, the energy is rapidly released, pushing the impact hammer 204 forward to strike the mortar surface, completing the impact test. After the impact test is completed, the impact hammer 204 rebounds under the action of the reaction force. The inner wall of the rebound housing 1 is provided with an acceleration... The acceleration sensor 12 (e.g., the aforementioned acceleration sensor 12 can be an ADXL345 model, LIS3DH model, etc.) is used to collect the deceleration change curve signal during the rebound process of the impact hammer 204 in real time, and transmit the deceleration change curve signal to the control panel 6. The control panel 6 calculates the rebound distance of the impact hammer by integrating the deceleration curve, and calculates the rebound value accordingly, which is finally displayed on the display screen 9. After the test is completed, the impact hammer 204 and related components automatically reset under the combined action of the impact spring 207 and the compression spring 201, preparing for the next test.

[0034] In one embodiment, the adjustment component 3 includes an adjustment seat 301 disposed at the bottom of the outer side of the rebound housing 1. A connecting seat 302 is disposed at the bottom of the adjustment seat 301, and the connecting seat 302 and the adjustment seat 301 are engaged by a rotating shaft 303. A drive motor 304 connected to the rotating shaft 303 is disposed at one end of the connecting seat 302, and an angle sensor 5 is disposed on one side of the adjustment seat 301. A control panel 6 is disposed on the side of the connecting seat 302 near the drive motor 304, thereby reducing the rebound value error caused by angle deviation and improving the accuracy and repeatability of mortar strength measurement.

[0035] The working principle of the adjustment component 3 is as follows: Based on the adhesion between the auxiliary plate 402 and the mortar surface, the angle sensor 5 (for example, the angle sensor 5 can be a Bourns model, Honeywell model, etc.) monitors the angle between the rebound shell 1 and the mortar surface in real time, and sends the monitoring data to the control panel 6. After receiving the monitoring data, the control panel 6 immediately starts the drive motor 304, which drives the adjustment seat 301 to rotate through the rotating shaft 303, thereby adjusting the angle of the rebound shell 1 until the impact direction is perpendicular to the mortar surface. At this time, the control panel 6 issues a command to stop the drive motor 304.

[0036] In one embodiment, the auxiliary component 4 includes a telescopic member 401 disposed on one side of the connecting seat 302. An auxiliary plate 402 is disposed on one side of the telescopic member 401, and the auxiliary plate 402 is connected to the connecting seat 302 by two sets of telescopic springs 403. The telescopic member 401 includes several auxiliary frames 4011 disposed on one side of the connecting seat 302. A fixing rod 4012 is disposed inside the auxiliary frame 4011, and two sets of first connecting rods are disposed at the top of the outer circumference of the fixing rod 4012. The rod 4013 has a bottom end that engages with the top end of another set of first connecting rods 4013. Two sets of second connecting rods 4014 are provided on the bottom outer circumference of the fixed rod 4012, with the bottom end of one set engaging with the top end of the other set. The second connecting rods 4014 and the first connecting rods 4013 are connected by a connecting shaft 4015, thereby ensuring that the impact direction is not disturbed by external factors and improving the stability and reliability of the detection data.

[0037] In one embodiment, for the auxiliary plate 402, a plurality of anti-slip strips 7 are provided on the side of the auxiliary plate 402 away from the telescopic member 401, and the anti-slip strips 7 are in a wave-like structure, thereby forming lateral resistance and preventing slippage during the detection process.

[0038] The working principle of auxiliary component 4 is as follows: When pressure is applied, the rebound component 2 impacts the mortar surface. At the same time, the auxiliary plate 402 is compressed and extends inward, causing the first connecting rod 4013 and the second connecting rod 4014 to rotate around the connecting shaft 4015, compressing the telescopic component 401. Meanwhile, the telescopic spring 403 stores energy. When the external force is removed, under the reset action of the telescopic spring 403, the first connecting rod 4013 and the second connecting rod 4014 return to their initial positions, causing the auxiliary plate 402 to extend outward, thus achieving automatic reset. In addition, the anti-slip strip 7 with a wave-shaped structure can form lateral resistance to prevent slippage during the detection process.

[0039] In one embodiment, for the aforementioned rebound housing 1, a fixing groove 8 is provided at the top edge of the outer circumference of the rebound housing 1. A display screen 9 is provided on one side of the inner bottom end of the fixing groove 8, and a protective shell 10 that cooperates with the display screen 9 is provided on the other side of the inner bottom end of the fixing groove 8. A plug-in 11 that cooperates with the fixing groove 8 is provided on one side of the protective shell 10. The plug-in 11 includes a groove 1101 provided on one side of the protective shell 10. A limit spring 1102 is provided on one side of the inner edge of the groove 1101, and a moving rod 1103 is provided on one side of the limit spring 1102. A sliding groove 1104 that cooperates with the moving rod 1103 is provided at the top edge of the groove 1101. The plug-in 11 also includes a limiting groove 1105 that cooperates with the moving rod 1103 on one side of the inner wall of the groove 1101, thereby protecting the display screen 9 and preventing damage caused by wear or external factors during long-term use, ensuring the accuracy of the readings and the service life of the rebound device.

[0040] It should be further explained that when it is necessary to read the test data, the operator pushes the moving rod 1103 to compress the limiting spring 1102, causing it to disengage from the engagement position of the limiting groove 1105, thereby releasing the limitation on the protective shell 10 and enabling the protective shell 10 to rotate so as to read the data on the display screen 9; after the reading is completed, the moving rod 1103 is pushed again to compress the limiting spring 1102, causing the moving rod 1103 to re-engage into the limiting groove 1105, and under the elastic restoring force of the limiting spring 1102, the protective shell 10 is fixed to the rebound shell 1, thereby protecting the display screen 9.

[0041] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0042] In practical applications, the rebound hammer is first moved to the mortar surface of the building to be tested, ensuring that the auxiliary plate 402 is in contact with the mortar surface and that the rebound hammer remains horizontal. Then, the adjustment component 3 is activated via the human-machine interface (HMI) of the control panel 6 to adjust the angle of the rebound hammer housing 1 (the working principle of the adjustment component 3 is as described above), making the impact direction of the rebound hammer perpendicular to the mortar surface. Finally, pressure is applied to the rebound hammer, and impact testing is performed through the rebound component 2 (the working principle of the rebound component 2 is as described above). During this process, the auxiliary component 4 works in conjunction (the working principle of the auxiliary component 4 is as described above), improving the stability, accuracy, and applicability of the testing process. Furthermore, the protective shell 10 is fitted to the rebound hammer housing 1 via the plug 11, providing protection for the display screen 9 when not in use, preventing damage caused by wear or external factors during long-term use, thereby ensuring the accuracy of the readings and extending the service life of the rebound hammer.

[0043] In summary, by utilizing the above-described technical solution of this utility model, the angle of the rebound shell 1 can be precisely adjusted by setting the adjustment component 3, ensuring that the impact direction of the rebound component 2 is always perpendicular to the surface of the building being tested. This reduces rebound value errors caused by angle deviations and improves the accuracy and repeatability of mortar strength measurement. By setting the auxiliary component 4, the rebound shell 1 can be supported and stabilized, preventing the rebound hammer from shaking, shifting, or sliding during testing, thus ensuring that the impact direction is not disturbed by external factors and improving the stability and reliability of the test data.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mortar rebound hammer for building inspection, characterized in that, include: Springback housing (1); The rebound assembly (2) is disposed inside the rebound housing (1) and is used to perform rebound detection on the building surface; An adjustment component (3) is provided at the bottom of the outer circumference of the rebound shell (1) and is used to adjust the angle between the rebound shell (1) and the building surface. An auxiliary component (4) is disposed on one side of the adjustment component (3) to assist in fixing the spring shell (1) in order to improve the stability of the detection process; The adjustment assembly (3) includes an adjustment seat (301) disposed at the bottom of the outer circumference of the spring housing (1), a connecting seat (302) disposed at the bottom of the adjustment seat (301), and the connecting seat (302) and the adjustment seat (301) are connected by a rotating shaft (303); a drive motor (304) connected to the rotating shaft (303) is disposed at one end of the connecting seat (302); an angle sensor (5) is disposed on one side of the adjustment seat (301); and a control panel (6) is disposed on the side of the connecting seat (302) near the drive motor (304). The auxiliary component (4) includes a telescopic member (401) disposed on one side of the connecting seat (302). An auxiliary plate (402) is disposed on one side of the telescopic member (401), and the auxiliary plate (402) is connected to the connecting seat (302) by two sets of telescopic springs (403). The telescopic member (401) includes several auxiliary frames (4011) disposed on one side of the connecting seat (302). A fixing rod (4012) is disposed inside the auxiliary frame (4011), and the outer circumference of the fixing rod (4012) is... The top end is provided with two sets of first connecting rods (4013), and the bottom end of one set of first connecting rods (4013) is engaged with the top end of the other set of first connecting rods (4013); the bottom end of the outer circumference of the fixed rod (4012) is provided with two sets of second connecting rods (4014), and the bottom end of one set of second connecting rods (4014) is engaged with the top end of the other set of second connecting rods (4014). The second connecting rods (4014) and the first connecting rods (4013) are engaged through a connecting shaft (4015).

2. The mortar rebound hammer for building inspection according to claim 1, characterized in that, The rebound assembly (2) includes a compression spring (201) disposed on one side inside the rebound housing (1). A guide flange (202) is disposed on one side of the compression spring (201). A central guide rod (203) is disposed on one side of the guide flange (202). A spring hammer (204) cooperating with the rebound housing (1) is disposed on one side of the central guide rod (203). A spring rod (205) is disposed on one side of the spring hammer (204). A limit ring (206) is disposed on the outer circumference of the spring rod (205). The limit ring (206) and the spring hammer (204) are cooperating through a spring tension spring (207).

3. The mortar rebound hammer for building inspection according to claim 1, characterized in that, The auxiliary plate (402) is provided with a plurality of anti-slip strips (7) on the side away from the telescopic member (401), and the anti-slip strips (7) are in a wave-shaped structure.

4. A mortar rebound hammer for building inspection according to claim 1, characterized in that, The outer circumferential top of the rebound shell (1) is provided with a fixing groove (8), a display screen (9) is provided on one side of the inner bottom end of the fixing groove (8), a protective shell (10) that cooperates with the display screen (9) is provided on the other side of the inner bottom end of the fixing groove (8), and a plug (11) that cooperates with the fixing groove (8) is provided on one side of the protective shell (10).

5. A mortar rebound hammer for building inspection according to claim 4, characterized in that, The plug-in (11) includes a groove (1101) formed on one side of the protective shell (10), a limit spring (1102) is provided on one side of the inside of the groove (1101), a moving rod (1103) is provided on one side of the limit spring (1102), and a sliding groove (1104) is provided at the top of the groove (1101) to cooperate with the moving rod (1103). The plug-in (11) also includes a limiting groove (1105) formed on one side of the inner wall of the groove (1101) and cooperating with the moving rod (1103).

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