A building main body structure strength detection device and a use method thereof

Abstract

This invention belongs to the technical field of structural strength testing equipment, specifically a device for testing the strength of a building's main structure and its usage method. It includes a housing and an impact component installed inside the housing, as well as an observation component mounted on the housing. The observation component is used to display the rebound amount of the impact hammer. This invention, by setting up a light source and a developing plate, displays the rebound amount of the impact hammer when it rebounds under the reaction force, through light illumination. Compared to the prior art that pushes a pointer, this effectively reduces the external force on the impact hammer during rebound, enhancing the accuracy of the test. Simultaneously, the developing plate changes color under light illumination, enhancing the visibility of the rebound path after the test, and the test results are maintained for a period of time, improving the accuracy of the test values ​​read by the staff, further enhancing the accuracy of testing the strength of concrete structures.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of structural strength detection equipment, and particularly relates to a house main body structure strength detection device and a use method thereof. BACKGROUND

[0002] In the field of house main body structure strength detection, according to the difference of the house main body structure, there are various detection methods, and the concrete structure is commonly used as the house main body structure, so how to detect the strength of the concrete structure constituting the house main body is a crucial part in the concrete building house acceptance link.

[0003] When the strength of the concrete structure is detected, the common test methods are the concrete strength core drilling method detection and the concrete strength rebound method detection, the core drilling method detection has high accuracy and intuitive test results, however, in the implementation, the concrete structure is damaged to a certain extent, the detection period is long, the cost is high, and the method is not suitable for intensive detection, and the rebound method detection does not damage the concrete structure in the implementation, and the detection method is relatively simple, so in the concrete structure strength detection process, the two detection methods are usually used together to detect the strength of the concrete structure, and in the implementation, the number of core drilling method detection points is usually small, and the intensity of the rebound method detection is large.

[0004] When the rebound method is used to detect the strength of the concrete structure, the rebound distance of the rebound hammer is used to calculate the strength of the concrete structure, and the rebound distance of the rebound hammer is directly related to the kinetic energy of the rebound hammer and the way in which the kinetic energy is absorbed, in the rebound process of the rebound hammer, the rebound hammer drives the pointer to move, in this process, the existence of the pointer and the friction generated by the movement of the pointer will affect the rebound distance of the rebound hammer, and further affect the accuracy of the rebound method detection, and at the same time after the test is completed, when the rebound instrument shakes, the movement of the pointer will also affect the accuracy of the finally displayed parameter, which is inconvenient for the staff to accurately read the rebound value, in view of this, the application provides a house main body structure strength detection device and a use method thereof, which are used to solve the above technical problems.

[0005] The information disclosed in this section of the background art is only intended to deepen the understanding of the general background art of the application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0006] In order to make up for the shortcomings of the prior art and solve the above technical problems, the application provides a house main body structure strength detection device and a use method thereof.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the housing main body structure strength detection device, including the shell and the installation in the shell interior, the shell one end opening is provided with the elastic hit component, and the shell opening place is slidably installed with the elastic hit rod, the elastic hit rod extends to the shell outside;

[0008] The connecting piece and the elastic hit hammer, one end of the elastic hit rod is fixedly installed with the connecting piece in the shell, the connecting piece is designed as T shape, and the elastic hit hammer is slidably sleeved on the connecting piece;

[0009] The tension spring, the elastic hit hammer is fixedly installed with the tension spring, and the tension spring is fixedly connected with the inner wall of the shell away from the elastic hit hammer;

[0010] The hook plate, the connecting piece is provided with a rotating groove away from the elastic hit rod one end, and the rotating groove is hingedly connected with the hook plate, and the top end of the elastic hit hammer is designed as T shape, and the hook plate is matched with the elastic hit hammer;

[0011] The top block, the inner cavity of the shell is fixedly installed with the top block away from the elastic hit rod one end, and the hook plate is designed as an inclined surface near the top block one side, and the top block is located on the moving path of the hook plate;

[0012] Further comprising an observation assembly, the observation assembly is installed on the shell, and the observation assembly is used for displaying the rebound amount of the elastic hit hammer;

[0013] The observation assembly includes a light projector, the elastic hit hammer is inlaid with a light projector, and the light projector is a light emitter with a power supply, a vibration sensor and a control circuit;

[0014] The light outlet groove is provided on the inner wall of the shell, and the light outlet groove is aligned with the light projector;

[0015] The developing plate is installed outside the light outlet groove, the developing plate is made of light-induced color-changing material, the developing plate is matched with the light projector, and the developing plate is provided with a scale.

[0016] Preferably, the shell is provided with a rotating groove away from the opening end, the rotating groove is slidably installed with a sliding ring, the sliding ring is fixedly installed with a mounting cylinder, the mounting cylinder is a tubular structure with two open ends, the mounting cylinder is provided with uniformly distributed mounting grooves, and the developing plate is inlaid in the mounting grooves.

[0017] Preferably, the rotating groove inner wall is fixedly installed with uniformly distributed inclined teeth, the sliding ring is fixedly installed with an elastic sheet, and the inclined teeth are located on the rotating path of the elastic sheet.

[0018] Preferably, the light projector is preferably an ultraviolet light projector, and the developing plate is preferably made of diaryl ethylene light-induced color-changing material.

[0019] Preferably, a pressing plate is sleeved on the mounting cylinder, a plurality of supporting rods are mounted on one end of the pressing plate towards the elastic striking rod, and a light shielding cloth is fixedly mounted between two adjacent supporting rods, and the light shielding cloth covers the developing plate in the initial state.

[0020] Preferably, the light shielding cloth is made of an elastic light shielding material.

[0021] Preferably, the supporting rod and the pressing plate are hingedly connected, a limiting ring is fixedly mounted on the pressing plate, and the limiting ring is used for limiting the rotation angle of the pressing rod.

[0022] Preferably, an assembly ring is fixedly mounted on the mounting cylinder away from the sliding ring, a plurality of clamping grooves are formed in the assembly ring, and the supporting rod is located in the clamping groove in the initial state.

[0023] Preferably, the inner wall of the clamping groove is designed as a slope, and the supporting rod is matched with the shape of the clamping groove.

[0024] A method for using a housing main body structure strength detection device, the method for using the housing main body structure strength detection device comprises the following steps:

[0025] A1: the staff holds the shell and the pressing plate with both hands respectively, manually pushes the pressing plate, moves the pressing plate to the opening end of the shell, pushes the supporting rod to move, and in the movement process, the supporting rod is guided by the clamping groove on the assembly ring, so that the supporting rod is opened;

[0026] A2: the device is close to the concrete structure plane to be measured, so that the supporting rod is pressed against the concrete structure plane, the shell is manually pushed, the shell is close to and pressed against the concrete structure plane, and then the elastic striking assembly operates;

[0027] A3: in the operation process of the elastic striking assembly, the elastic hammer and the elastic striking rod collide, so that the light projector mounted on the elastic hammer is turned on, the light projector is moved in the rebound process of the elastic hammer, the light emitted by the light projector passes through the light outlet groove and irradiates on the developing plate, so that the developing plate changes color;

[0028] A4: after the test is completed, the staff reads the maximum scale of the color-changing area on the developing plate, and then manually rotates the sliding ring, so that the sliding ring and the mounting cylinder are rotated, the developing plate is switched, and the next operation is facilitated.

[0029] The beneficial effects of the present application are as follows:

[0030] 1. The housing main body structure strength detection device and the use method thereof, through the setting of the light projector and the developing plate, when the elastic hammer is rebounded by the reaction force, the rebounding of the elastic hammer is displayed through the irradiation of the light, compared with the movement of the pointer in the prior art, the external force acting on the elastic hammer during rebounding can be effectively reduced, the detection accuracy is enhanced, at the same time, the developing plate changes color under the irradiation of the light, after the detection is completed, the rebounding path is more obvious, at the same time, the detection result can be maintained for a period of time, the accuracy of the staff reading the test value is enhanced, and the test accuracy of the concrete structure strength is further enhanced.

[0031] 2. The housing main body structure strength detection device and the use method thereof, through the setting of the limiting ring, the rotating angle of the supporting rod is limited, in the detection process, the supporting rods cooperate with the pressing plate to resist on the concrete structure surface, a stable supporting structure is formed, the moving path of the shell is guided, and then the deviation probability of the shell during pressing is reduced, and the detection precision is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0032] The application will be further described below in combination with the drawings.

[0033] Figure 1 is a perspective view of the application;

[0034] Figure 2 is a side view of the application;

[0035] Figure 3 is a partially exploded view of the application;

[0036] Figure 4 is a partially exploded view of the application;

[0037] Figure 5 is an internal structure diagram of the shell;

[0038] Figure 6 is a partially exploded view of the application;

[0039] Figure 7 is Figure 6 is a local enlarged view of A in the figure;

[0040] Figure 8 is a sectional view of the rotating groove;

[0041] Figure 9 is a method flow chart of the application;

[0042] In the figure: 1, shell; 11, elastic rod; 12, connecting piece; 13, elastic hammer; 14, tension spring; 15, hook plate; 16, rotating groove; 17, top block; 2, light projector; 21, light outlet groove; 22, developing plate; 23, rotating groove; 24, slip ring; 25, mounting cylinder; 26, mounting groove; 3, bevel gear; 31, elastic sheet; 4, pressing plate; 41, support rod; 42, light shield cloth; 43, limiting ring; 5, assembly ring; 51, clamping groove. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0044] As Figures 1 to 9 shown, the housing 1 and the elastic hammer assembly installed in the housing 1 are included in the housing 1, the elastic hammer assembly includes an elastic rod 11, one end of the housing 1 is provided with an opening, and the elastic rod 11 is slidably installed at the opening of the housing 1, and the elastic rod 11 extends to the outside of the housing 1;

[0045] The connecting piece 12 and the elastic hammer 13 are provided, one end of the elastic rod 11 is fixedly installed with the connecting piece 12 in the housing 1, the connecting piece 12 is designed in a T shape, and the elastic hammer 13 is slidably sleeved on the connecting piece 12;

[0046] The tension spring 14 is fixedly installed on the elastic hammer 13, and the tension spring 14 is fixedly connected to the inner wall of the housing 1 away from the elastic hammer 13;

[0047] The hook plate 15 is provided, the connecting piece 12 is provided with a rotating groove 16 away from the elastic rod 11, the hook plate 15 is hingedly connected in the rotating groove 16, the top end of the elastic hammer 13 is designed in a T shape, and the hook plate 15 is matched with the elastic hammer 13;

[0048] The top block 17 is fixedly installed in the inner cavity of the housing 1 away from the elastic rod 11, the side of the hook plate 15 close to the top block 17 is designed in an inclined surface, and the top block 17 is located on the moving path of the hook plate 15;

[0049] The observation assembly is also included, the observation assembly is installed on the housing 1, and the observation assembly is used to display the rebound amount of the elastic hammer 13;

[0050] The observation assembly includes the light projector 2, the light projector 2 is embedded on the elastic hammer 13, and the light projector 2 is a light emitter with a power supply, a vibration sensor and a control circuit;

[0051] The light outlet groove 21 is provided on the inner wall of the housing 1, and the light outlet groove 21 is aligned with the light projector 2;

[0052] a developing plate 22, which is installed outside the light outlet groove 21, is made of a photochromic material, matches the light projector 2, and has a scale on it;

[0053] In the strength detection of the main concrete structure of a house by using a rebound hammer, the staff first divides the measurement points on the concrete structure, then polishes the part to be detected to enhance the flatness of the position to be detected, then the staff holds the detection device and aims the striking rod 11 on the detection device at the surface to be detected, and applies force to the detection device in a direction perpendicular to the surface to be detected. When the pressure of the detection device is increased, the shell 1 gradually approaches the concrete structure plane, at this time, the striking rod 11 between the shell 1 and the concrete structure plane shrinks to the inside of the shell 1, and the connecting piece 12 fixedly installed on the striking rod 11 moves in the inner cavity of the shell 1. In the initial state, the striking hammer 13 is clamped with the hook plate 15 and moves synchronously with the connecting piece 12. As the movement distance of the connecting piece 12 and the striking hammer 13 increases, the hook plate 15 gradually approaches and contacts the top block 17. After the inclined surface of the hook plate 15 contacts the top block 17, it is limited by the top block 17, so that the hook plate 15 is extruded in the rotating groove 16 and is deflected in the continuous movement. As the deflection angle of the hook plate 15 gradually increases, the hook plate 15 is separated from the striking hammer 13. In the process of movement of the striking hammer 13, the striking hammer 13 pulls and stretches the tension spring 14, so that the tension spring 14 is elongated. Therefore, after the striking hammer 13 is separated from the hook plate 15, the tension spring 14 has a tendency to restore the deformation. At this time, the tension spring 14 drives the striking hammer 13 to approach the striking rod 11. Then, the striking hammer 13 hits the end face of the striking rod 11, and the impact force is transmitted to the concrete structure plane along the striking rod 11. At the same time, the reaction force generated on the concrete structure plane acts on the striking hammer 13 along the striking rod 11, so that the striking hammer 13 moves away from the striking rod 11 under the action of the reaction force. It should be noted that the light projector 2 installed in the striking hammer 13 is a light ray emitter with a power supply, a vibration sensor and a control circuit. Under the control of the pre-set program in the light ray emitter, when the vibration sensor senses vibration, the circuit in the light ray emitter is turned on, so that the light projector 2 continuously emits light. When the striking hammer 13 moves under the action of the reaction force, the light emitted by the light projector 2 is irradiated on the developing plate 22 through the light outlet groove 21, and a moving path of the light on the developing plate 22 is formed as the striking hammer 13 moves. In the present application, the developing plate 22 is made of light-decoloring material, and the wavelength of the light emitted by the light projector 2 matches the developing plate 22. Therefore, when the light emitted by the light projector 2 irradiates on the developing plate 22, the developing plate 22 changes color, thereby directly displaying the rebound path of the striking hammer 13, and the staff can directly check the rebound amount of the striking hammer 13 under the reaction force by cooperating with the scale on the developing plate 22, so as to measure the strength of the concrete. At the same time, under the control of the pre-set program in the control circuit, the circuit is automatically disconnected after being turned on for a period of time, thereby prolonging the continuous use time of the detection device.

[0054] When the detection is finished, the staff manually releases the pressing of the shell 1 and reversely pulls the bullet lever 11, when the connecting piece 12 and the bullet hammer 13 gradually approach, the hook plate 15 on the connecting piece 12 contacts with the bullet hammer 13, and the hook plate 15 rotates under the hindrance of the bullet hammer 13, because the hook plate 15 is elastically hinged in the rotating groove 16, when the hook plate 15 is aligned with the bullet hammer 13, the hook plate 15 is clamped with the bullet hammer 13 again, which is convenient for the next detection.

[0055] In the application, the light projector 2 and the developing plate 22 are arranged, when the bullet hammer 13 rebounds under the reaction force, the rebounding of the bullet hammer 13 is displayed through the irradiation of the light, compared with the movement of the pointer in the prior art, the external force acting on the bullet hammer 13 when rebounding can be effectively reduced, the detection accuracy is enhanced, meanwhile, the developing plate 22 changes color under the irradiation of the light, after the detection is finished, the rebounding path is enhanced in visibility, the detection result can be kept for a period of time, the accuracy of reading the test value of the staff is enhanced, and the test accuracy of the strength of the concrete structure is further enhanced.

[0056] As a preferred embodiment of the application, the shell 1 is provided with a rotating groove 23 away from the opening end, a sliding ring 24 is slidingly installed in the rotating groove 23, an installation cylinder 25 is fixedly installed on the sliding ring 24, the installation cylinder 25 is a tubular structure with two open ends, uniform installation grooves 26 are formed in the installation cylinder 25, and the developing plates 22 are embedded in the installation grooves 26.

[0057] When the strength of the concrete structure is detected, the sliding ring 24 and the installation cylinder 25 are arranged, when the detection is finished, the rebounding path of the bullet hammer 13 is formed on the developing plate 22 corresponding to the light outlet groove 21, at this time, the staff manually rotates the sliding ring 24, so that the sliding ring 24 rotates in the rotating groove 23, and in the process of rotating the sliding ring 24, the sliding ring 24 drives the installation cylinder 25 to synchronously rotate, when the installation cylinder 25 rotates, the installation grooves 26 corresponding to the light outlet groove 21 are obtained, the developing plate 22 is switched, and then the strength detection of the concrete structure is facilitated again.

[0058] As a preferred embodiment of the application, the rotating groove 23 is fixedly installed with uniformly distributed inclined teeth 3, the sliding ring 24 is fixedly installed with elastic sheets 31, and the inclined teeth 3 are located in the rotating path of the elastic sheets 31.

[0059] By setting the oblique teeth 3 and the elastic sheet 31, in the process of manually rotating the slip ring 24, the elastic sheet 31 fixedly installed on the slip ring 24 rotates synchronously in the rotating groove 23, and then the elastic sheet 31 and the oblique teeth 3 produce relative motion. In the process of rotating the elastic sheet 31, the elastic sheet 31 contacts and is hindered by the oblique teeth 3, so that the elastic sheet 31 produces elastic deformation. With the increase of the rotation angle of the slip ring 24, the elastic sheet 31 passes through the oblique teeth 3 and restores to the original state under the elastic action of itself. In this process, the fingers of the worker in contact with the slip ring 24 can feel obvious vibration. By adjusting the distance between the oblique teeth 3 and the distance between the installation grooves 26, such as the distance between the installation grooves 26 is an integer multiple of the distance between the oblique teeth 3, it is convenient for the worker to align the installation grooves 26 with the light-emitting grooves 21. At the same time, the setting of the oblique teeth 3 and the elastic sheet 31 can also reduce the probability of accidental deviation of the slip ring 24 and the installation cylinder 25, and misalignment of the light-emitting grooves 21 and the developing plate 22.

[0060] As a preferred embodiment of the present application, the light-emitting lamp 2 is preferably an ultraviolet light-emitting lamp, and the developing plate 22 is preferably made of diarylethene photochromic material;

[0061] The developing plate 22 is made of diarylethene photochromic material. When the light-emitting lamp 2 emits ultraviolet light beam and irradiates on the developing plate 22, the diarylethene compound produces cyclization reaction. When the worker reads the parameters, the developing plate 22 undergoes ring-opening reaction under the irradiation of visible light, and the developing plate 22 restores from colored to colorless, which is convenient for repeated use of the developing plate 22.

[0062] As a preferred embodiment of the present application, the installation cylinder 25 is sleeved with a pressing plate 4, a plurality of supporting rods 41 are installed at one end of the pressing plate 4 towards the elastic rod 11, and a shading cloth 42 is fixedly installed between adjacent two supporting rods 41. In the initial state, the shading cloth 42 covers the developing plate 22;

[0063] By setting up a pressure plate 4 and a support rod 41, when conducting strength testing on the concrete structural surface, the worker holds one end of the housing 1 with one hand and pushes the pressure plate 4 with the other, causing the pressure plate 4 to slide on the mounting cylinder 25 with the sliding direction facing the concrete structural surface. Then, the worker moves the entire device towards the concrete wall. During this process, the support rod 41 first contacts the concrete structural surface, and under the action of the pushing force, the support rod 41 rotates relative to the pressure plate 4, thereby unfolding the light-blocking cloth 42. Then, the housing 1 is pushed, and the housing 1 moves towards the concrete structural surface for a rebound test. During this process, the spotlight 2 projects light onto the developing plate 22. As the housing 1 moves towards the concrete structural surface... When the device is in use, the mounting cylinder 25 gradually enters the area shielded by the light-shielding cloth 42. This reduces the impact of external light on the spotlight 2 and the developing plate 22, enhancing the color-changing accuracy of the developing plate 22. After the test is completed, the staff manually pushes the pressure plate 4 again to expose the mounting cylinder 25, making it easier for the staff to read the scale on the developing plate 22 and allowing visible light to irradiate the developing plate 22. When the device is not in use, the pressure plate 4 is close to the slip ring 24, the support rod 41, and the light-shielding cloth 42 installed between the support rods 41, covering the mounting cylinder 25 and the developing plate 22 installed on it, reducing the impact of the external environment on the developing plate 22 and extending the service life of the developing plate 22.

[0064] In a preferred embodiment of the present invention, the light-shielding cloth 42 is made of an elastic light-shielding material;

[0065] The light-shielding cloth 42 is made of elastic light-shielding material. When the support rod 41 is not subjected to external force, multiple support rods 41 can be retracted on the surface of the mounting cylinder 25 under the pull of the light-shielding cloth 42 to block the mounting cylinder 25, and at the same time, the overall volume of the device can be reduced.

[0066] In a preferred embodiment of the present invention, the support rod 41 and the pressure plate 4 are both hinged, and a limit ring 43 is fixedly installed on the pressure plate 4. The limit ring 43 is used to limit the rotation angle of the pressure rod.

[0067] By setting a limiting ring 43, the rotation angle of the support rod 41 is limited. During the testing process, multiple support rods 41 work together with the pressure plate 4 to resist the concrete structure surface, forming a stable support structure, which guides the movement path of the shell 1, thereby reducing the probability of the shell 1 deviating during the pressing process and enhancing the testing accuracy.

[0068] In a preferred embodiment of the present invention, an assembly ring 5 is fixedly installed on the end of the mounting cylinder 25 away from the slip ring 24. The assembly ring 5 has evenly distributed slots 51. In the initial state, the support rod 41 is located in the slots 51.

[0069] By setting the slot 51, when the pressure plate 4 approaches the slip ring 24, the support rod 41 retracts onto the outer wall of the mounting cylinder 25. The assembly ring 5 and the slot 51 provide an installation position for the support rod 41, enhance the structural tightness of each part of the device, and facilitate the storage of the device.

[0070] In a preferred embodiment of the present invention, the inner wall of the slot 51 is designed with an inclined surface, and the support rod 41 matches the shape of the slot 51;

[0071] By setting the inner wall of the slot 51 with an inclined surface, when the operator manually pushes the pressure plate 4, the pressure plate 4 pushes the support rod 41 to move. Under the guidance of the inclined surface of the inner wall of the slot 51, the support rod 41 automatically deflects and opens, enhancing the ease of use of the device.

[0072] A method for using a building main structure strength testing device, the method comprising the following steps:

[0073] A1: The worker holds the housing 1 and the pressure plate 4 with both hands respectively, and manually pushes the pressure plate 4, causing the pressure plate 4 to move towards the opening end of the housing 1. The pressure plate 4 pushes the support rod 41 to move. During the movement, the support rod 41 is guided by the slot 51 on the assembly ring 5, causing the support rod 41 to open.

[0074] A2: Move the equipment close to the concrete structure plane to be measured, so that the support rod 41 is against the concrete structure plane. Manually push the housing 1 to move the housing 1 close to and press it against the concrete structure plane, and then perform the snap component operation.

[0075] A3: During the operation of the impact assembly, the impact hammer 13 and the impact rod 11 collide, causing the light lamp 2 installed on the impact hammer 13 to turn on. During the rebound of the impact hammer 13, the light lamp 2 is moved. The light emitted by the light lamp 2 passes through the light outlet groove 21 and shines on the developing plate 22, causing the developing plate 22 to change color.

[0076] A4: After the test, the staff read the maximum scale of the color-changing area on the developing plate 22, and then manually rotate the slip ring 24, causing the slip ring 24 and the mounting cylinder 25 to rotate, switching the developing plate 22 for the next operation.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structural strength testing device for a building, comprising a housing (1) and an impact assembly installed inside the housing (1), the impact assembly comprising an impact rod (11), the housing (1) having an opening at one end, and the impact rod (11) being slidably installed at the opening of the housing (1), the impact rod (11) extending to the outside of the housing (1); Connector (12) and striking hammer (13), the striking rod (11) is located inside the housing (1) and one end is fixedly installed with connector (12), the connector (12) is T-shaped, and the striking hammer (13) is slidably sleeved on the connector (12); A tension spring (14) is fixedly installed on the impact hammer (13), and the end of the tension spring (14) away from the impact hammer (13) is fixedly connected to the inner wall of the housing (1). The hook plate (15) has a rotating groove (16) at one end of the connector (12) away from the impact rod (11). The hook plate (15) is hinged in the rotating groove (16). The top of the impact hammer (13) has a T-shaped design. The hook plate (15) matches the impact hammer (13). Top block (17): The top block (17) is fixedly installed at the end of the inner cavity of the housing (1) away from the ballistic rod (11). The hook plate (15) is designed with an inclined surface on the side close to the top block (17), and the top block (17) is located on the moving path of the hook plate (15). Its features are: It also includes an observation component mounted on the housing (1) for displaying the amount of rebound of the striking hammer (13); The observation component includes a light spot (2), and the light spot (2) is embedded in the impact hammer (13). The light spot (2) is a light emitter with its own power supply, vibration sensor and control circuit. Light-emitting groove (21): A light-emitting groove (21) is provided on the inner wall of the housing (1), and the light-emitting groove (21) is aligned with the spotlight (2); The developing plate (22) is installed outside the light outlet groove (21). The developing plate (22) is made of photochromic material. The developing plate (22) is matched with the light spot lamp (2). The developing plate (22) has a scale. The housing (1) has a rotating groove (23) at the end away from the opening. A slip ring (24) is slidably installed in the rotating groove (23). An installation cylinder (25) is fixedly installed on the slip ring (24). The installation cylinder (25) is a tubular structure with openings at both ends. The installation cylinder (25) has evenly distributed installation grooves (26). The developing plates (22) are all embedded in the installation grooves (26). The inner wall of the rotating groove (23) is fixedly equipped with evenly distributed helical teeth (3), and the slip ring (24) is fixedly equipped with an elastic plate (31). The helical teeth (3) are located on the rotation path of the elastic plate (31). A pressure plate (4) is slidably sleeved on the mounting cylinder (25). Multiple support rods (41) are installed on one end of the pressure plate (4) facing the spring rod (11). A light-blocking cloth (42) is fixedly installed between two adjacent support rods (41). In the initial state, the light-blocking cloth (42) covers the developing plate (22).

2. The structural strength testing device for a building according to claim 1, characterized in that: The light source (2) is preferably an ultraviolet light source, and the developing plate (22) is preferably made of a diarylethylene-based photochromic material.

3. The structural strength testing device for a building according to claim 2, characterized in that: The light-blocking cloth (42) is made of elastic light-blocking cloth (42) material.

4. The structural strength testing device for a building according to claim 3, characterized in that: The support rod (41) and the pressure plate (4) are both hinged. A limit ring (43) is fixedly installed on the pressure plate (4). The limit ring (43) is used to limit the rotation angle of the pressure rod.

5. The structural strength testing device for a building as described in claim 4, characterized in that: An assembly ring (5) is fixedly installed at the end of the mounting cylinder (25) away from the slip ring (24). The assembly ring (5) has evenly distributed slots (51). In the initial state, the support rod (41) is located in the slots (51).

6. The structural strength testing device for a building as described in claim 5, characterized in that: The inner wall of the slot (51) is designed with a slope, and the support rod (41) matches the shape of the slot (51).

7. A method for using a structural strength testing device for a building, characterized in that: This method is applicable to the building main structure strength testing device according to any one of claims 1-6 above, and the method of using the building main structure strength testing device includes the following steps: A1: The staff member holds the shell (1) and the pressure plate (4) with both hands respectively, and pushes the pressure plate (4) manually, causing the pressure plate (4) to move towards the opening end of the shell (1). The pressure plate (4) pushes the support rod (41) to move. During the movement, the support rod (41) is guided by the slot (51) on the assembly ring (5), causing the support rod (41) to open. A2: Move the equipment close to the concrete structure plane to be measured, so that the support rod (41) is against the concrete structure plane. Manually push the housing (1) so that the housing (1) is close to and pressed against the concrete structure plane, and then perform the snap component operation. A3: During the operation of the impact assembly, the impact hammer (13) and the impact rod (11) collide, causing the spotlight (2) installed on the impact hammer (13) to turn on. During the rebound of the impact hammer (13), the spotlight (2) is moved. The light emitted by the spotlight (2) passes through the light outlet groove (21) and shines on the developing plate (22), causing the developing plate (22) to change color. A4: After the test, the staff read the maximum scale of the color-changing area on the developing plate (22), and then manually rotate the slip ring (24) to make the slip ring (24) and the mounting cylinder (25) rotate, and switch the developing plate (22) for the next operation.

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