House wall hollowing detection device

Abstract

The utility model discloses a house wall hollowing detection device, and belongs to the technical field of house wall hollowing detection. A house wall hollowing detection device comprises a telescopic holding rod, and further comprises a switching block which is rotatably connected to the telescopic end of the holding rod and is provided with a center line, when the center line coincides with the axis of the holding rod, the switching block is located at a first working position, and when the switching block is perpendicular to the axis of the holding rod, the switching block is located at a second working position; a prompting rod is slidably connected into the switching block, the knocking head is connected with the prompting rod through a damping piece, and the free end of the prompting rod can extend out of the switching block; the movable block, the knocking head and the buffer spring are used in cooperation, the stress generated when the knocking head makes contact with the wall face is reduced, and therefore the problem that scratches and micro cracks appear on the wall face due to the fact that the knocking force is large is avoided.

Description

A device for detecting hollow walls in houses Technical Field

[0001] This utility model relates to the field of building wall hollowness detection technology, and in particular to a building wall hollowness detection device. Background Technology

[0002] Hollow wall detection is a crucial part of building construction quality control. It aims to identify the separation between the mortar layer and the base layer inside the wall. Its necessity is mainly reflected in the following aspects: hollow areas can easily lead to wall cracks, peeling of the finishing layer, and the risk of falling objects from heights causing injury; hollow areas can cause problems such as paint peeling and expansion of hollow tiles, significantly reducing the service life of decorative materials; hollow areas can disrupt the continuity of the waterproof layer, induce leakage, and affect the performance of the building envelope.

[0003] Hollow wall detection devices identify internal wall defects using various technologies. Their core structures are categorized into mechanical and electronic types based on their operating principles. Mechanical hollow wall hammers consist of a handle and a metal striking head. By having the inspector strike the wall, they generate acoustic feedback, utilizing the acoustic difference between hollow and solid areas to locate defects. This type is suitable for rapid initial inspections. Electronic devices, including infrared thermal imagers, ultrasonic detectors, and electronic hollow wall detectors, complement each other in terms of detection accuracy, operational complexity, and applicable scenarios, collectively forming a technical system for building quality inspection.

[0004] Traditional hollow-sounding hammers have revealed significant technical limitations in long-term engineering practice. Inspectors typically use either sliding or striking methods, switching between them is achieved by changing the hammer's usage. However, this method has drawbacks. When using the striking method, the hardness mismatch between the metal head and the brittle surface layer is prominent. The concentrated stress at the moment of impact can easily cause surface scratches, micro-cracks, or even glaze chipping, potentially leading to secondary repair costs, especially in high-end interior decoration projects. When using the sliding method, if the wall being inspected is smooth, such as a tile surface, the friction between the striking head and the tile is low, making it difficult for the striking head to vibrate. Therefore, the sound produced is quieter than with striking, potentially leading to misjudgments. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art where stress concentration when the tapping head contacts the wall causes cracks or scratches on the wall surface, and where reduced friction during sliding detection results in a small feedback sound. Therefore, this invention proposes a device for detecting hollow walls in houses.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for detecting hollow walls in a house includes a telescopic handle and a switching block rotatably connected to the telescopic end of the handle. The switching block has a center line L. When the center line L coincides with the axis of the handle, the switching block is in a first working position. When the switching block is perpendicular to the axis of the handle, the switching block is in a second working position. A striking head is also included. A prompting rod is slidably connected inside the switching block. The striking head is connected to the prompting rod through a damping element. The free end of the prompting rod can extend out of the switching block.

[0008] To reduce the stress when the striking head contacts the wall, preferably, the damping component includes: a conical spring, a movable block slidably connected to the top of the switching block, the two ends of the conical spring being fixedly connected to the striking head and the movable block respectively, and an unlocking component being provided on the movable block; a push plate slidably connected inside the switching block, a prompting rod being fixedly connected to the push plate, and the movable block and the push plate being connected by a buffer spring.

[0009] To facilitate the adjustment, locking, or unlocking of the hammer head, the unlocking component further includes: a positioning groove formed on the movable block, a "C"-shaped adjusting rod slidably connected in the positioning groove, and a corresponding sliding groove for the striking head corresponding to the adjusting rod.

[0010] To make the locking more stable, the positioning groove is further designed as a "C" shaped groove for locking or unlocking the knocking head.

[0011] In order to change the working position of the switching block, preferably, the telescopic end of the grip is fixedly installed with an installation plate. The installation plate and the switching block are rotatably connected by a rotating shaft. A locking groove is opened on the rotating shaft. The installation plate is provided with a matching sliding groove corresponding to the locking groove. A locking block is slidably installed in the sliding groove. A return spring is installed in the groove. The two ends of the return spring abut against the locking block and the groove, respectively.

[0012] To alert the inspector that the tapping force is too strong, preferably, the free end of the indicator rod is coated with red or fluorescent color.

[0013] Compared with the prior art, this utility model provides a device for detecting hollow walls in houses, which has the following advantages:

[0014] 1. This hollow wall detection device can switch the direction of the striking head by rotating the switching block 90 degrees clockwise. When the center line coincides with the axis of the handle, it is in sliding inspection mode, which can initially detect the location of hollow areas. When the center line is perpendicular to the axis of the handle, it is in striking mode, which allows for repeated and detailed inspection of suspicious locations. This enables the device to switch between different modes.

[0015] 2. The wall hollow detection device is designed with a buffer spring. When the inspector taps the wall, the buffer spring first contracts and reduces the impact between the tapping head and the wall, thus protecting the wall and preventing scratches, micro-cracks, or even glaze chipping caused by stress concentration at the contact point between the tapping head and the wall.

[0016] 3. The wall hollow detection device uses a damping component consisting of a buffer spring, a push plate, and a warning rod. When the inspector strikes with excessive force, the buffer spring transmits the impact to the push plate, which then moves the warning rod. The warning rod is exposed outside the switching block, and its bright color helps the inspector understand that the striking force is too great, thus reducing the striking force, protecting the wall, and facilitating use.

[0017] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model utilizes the combined use of a movable block, a striking head, and a buffer spring to reduce the stress when the striking head contacts the wall, thereby avoiding the problem of scratches and micro-cracks on the wall due to excessive striking force. Attached Figure Description

[0018] Figure 1 is an isometric structural schematic diagram of a hollow wall detection device proposed in this utility model;

[0019] Figure 2 is an enlarged structural schematic diagram of point A in Figure 1 of a hollow wall detection device proposed in this utility model;

[0020] Figure 3 is an enlarged structural schematic diagram of point B in Figure 1 of a hollow wall detection device proposed in this utility model;

[0021] Figure 4 is a partial structural schematic diagram of a hollow wall detection device proposed in this utility model.

[0022] In the diagram: 1. Grip bar; 2. Switching block; 3. Moving block; 4. Conical spring; 5. Knocking head; 6. Buffer spring; 7. Push plate; 8. Indicator rod; 9. Mounting plate; 10. Locking groove; 11. Locking block; 12. Return spring; 13. Positioning groove; 14. Adjusting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Example:

[0026] Referring to Figures 1-4, a device for detecting hollow walls in a house includes a telescopic handle 1. The handle 1 has at least two extension arms inside, each with an interference fit. The length of each extension arm is 0.5m-0.8m, preferably 0.7m in this application, to allow the operator to adjust the length of the handle 1 according to the height of the house, avoiding the need for a ladder for detection at excessively high locations. The handle 1 has a grip portion, the outer side of which is covered with an anti-slip pad. Multiple corrugated strips are arranged on the anti-slip pad. A switching block 2 is rotatably connected to the telescopic end of the handle 1. It has a center line L. When the center line L coincides with the axis of the handle 1, the switching block 2 is in the first working position. When the switching block 2 is perpendicular to the axis of the handle 1, the switching block 2 is in the second working position. By rotating the switching block 2, the switching block 2 is rotated 90 degrees clockwise. When the center line L coincides with the axis of the handle 1, it is in the sliding inspection mode, which can initially detect the location of the hollow area. When the center line L is perpendicular to the axis of the handle 1, it is in the tapping mode, which allows for repeated and detailed inspection of the suspicious locations. This realizes the switching mode use of the hollow area detection device.

[0027] A prompting rod 8 is slidably connected inside the switching block 2. The striking head 5 is connected to the prompting rod 8 through a damping component. A conical spring 4 is installed in the damping component. A movable block 3 is slidably connected to the top of the switching block 2. The two ends of the conical spring 4 are fixedly connected to the striking head 5 and the movable block 3, respectively. It is used through the buffer spring 6. When the inspector strikes the wall, the buffer spring 6 first contracts and reduces the impact between the striking head 5 and the wall, thereby protecting the wall and avoiding the problem of scratches, micro-cracks or even glaze chipping on the wall surface caused by stress concentration at the contact point between the striking head 5 and the wall.

[0028] The movable block 3 is equipped with an unlocking component and a positioning groove 13. A "C"-shaped adjusting rod 14 is slidably connected in the positioning groove 13. The striking head 5 has a matching sliding groove corresponding to the adjusting rod 14. The positioning groove 13 is set as a "C"-shaped groove for locking or unlocking the striking head 5. By setting the unlocking component, the position of the adjusting rod 14 is changed, thereby locking or unlocking the striking head 5. When the striking head 5 is unlocked and used in conjunction with the sliding detection method, the inspector gently shakes the lever 1, causing the striking head 5 to vibrate slightly. When the striking head 5 is used with the tile surface, it will also make a tapping sound, making it easier to judge the location of hollow spots. This avoids the situation where the striking head 5 is difficult to vibrate due to low friction during sliding, resulting in a small sound and affecting the inspector's judgment.

[0029] A push plate 7 is slidably connected inside the switching block 2, and an indicator rod 8 is fixedly connected to the push plate 7. The movable block 3 and the push plate 7 are connected by a buffer spring 6. The free end of the indicator rod 8 can extend out of the switching block 2. The free end of the indicator rod 8 is coated with a bright color, such as red or fluorescent. The buffer spring 6, the push plate 7, and the indicator rod 8 in the damping components work together. When the inspector strikes with too much force, the buffer spring 6 transmits the impact force to the push plate 7. The push plate 7 pushes the indicator rod 8 to move, exposing the indicator rod 8 outside the switching block 2. Thus, the bright color of the indicator rod 8 allows the inspector to understand that the striking force is too great, thereby reducing the striking force, protecting the wall, and facilitating use.

[0030] A mounting plate 9 is fixedly installed on the telescopic end of the handle 1. The mounting plate 9 and the switching block 2 are rotatably connected by a rotating shaft. A locking groove 10 is provided on the rotating shaft. The mounting plate 9 has a matching sliding groove corresponding to the locking groove 10. A locking block 11 is slidably installed in the sliding groove. A return spring 12 is installed in the groove. The two ends of the return spring 12 abut against the locking block 11 and the groove, respectively. After pushing the locking block 11, the locking block 11 enters the groove and disengages from the locking groove 10, the rotating shaft can be unlocked. Then the switching block 2 can be rotated to adjust the position of the switching block 2 and change the detection mode for convenient use.

[0031] In this invention, the adjusting rod 14 is first rotated and pulled down so that the top of the adjusting rod 14 is disengaged from the striking head 5. At this time, the axis of the striking head 5 is parallel to the axis of the handle 1 and is in a sliding detection state. Then, the inspector uses the sliding method to detect the wall surface. When the wall surface is cement, the striking head 5 will vibrate because the cement surface is relatively rough. At the same time, it will drive the conical spring 4 to swing. At this time, the striking head 5 will swing because the conical spring 4 will release its elasticity after deformation. The vibration of the striking head 5 makes it easy to determine whether there are hollow areas in the cement wall surface.

[0032] When the wall surface is tiled, the inspector gently shakes the handle 1 or the tapping head 5 and bumps into the joint between the tiles. At this time, the tapping head 5 vibrates and taps the tile surface. When the tapping head 5 vibrates, the conical spring 4 deforms. The conical spring 4 reduces the deformation force generated by the inspector shaking the handle 1, preventing excessive force from the tapping head 5 from hitting too hard. The tapping head 5 moves on the tile surface in coordination with the tile surface. As the tapping head 5 vibrates, the hollow areas of the tile surface will also produce the sound produced when tapped, which makes it easier to initially determine the location of the hollow areas.

[0033] Then, push the locking block 11 to disengage it from the locking groove 10, and then push the switching block 2 to rotate 90 degrees clockwise so that the axis of the striking head 5 is perpendicular to the axis of the handle 1. Then push the locking block 11 into the locking groove 10. At this time, the switching block 2 is locked and the striking head 5 is in the striking detection state. Then the inspector conducts a precise striking test on the hollow area detected by the sliding. At this time, the striking head 5 contacts the wall and generates a reaction force, and the pressure is released by the deformation of the buffer spring 6, reducing the stress of contact with the wall during the striking.

[0034] If the inspector strikes too hard, the buffer spring 6 will press the push plate 7, causing the push plate 7 to move and push the indicator rod 8 to extend to the outside of the switching block 2, exposing the indicator rod 8. At this time, the inspector will observe the brightly colored indicator rod 8, thus understanding the problem of excessive striking force, and then reducing the striking force.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for detecting hollow walls in a house, comprising a retractable handle (1), characterized in that, Also includes: The switching block (2) is rotatably connected to the telescopic end of the grip (1) and has a center line L. When the center line L coincides with the axis of the grip (1), the switching block (2) is in the first working position. When the switching block (2) is perpendicular to the axis of the grip (1), the switching block (2) is in the second working position. The striking head (5) has a prompting rod (8) slidably connected inside the switching block (2). The striking head (5) is connected to the prompting rod (8) through a damping element. The free end of the prompting rod (8) can extend out of the switching block (2).

2. The device for detecting hollow walls in a house according to claim 1, characterized in that, The damping component includes: a conical spring (4), wherein a movable block (3) is slidably connected to the top of the switching block (2), and the two ends of the conical spring (4) are respectively fixedly connected to the striking head (5) and the movable block (3), and an unlocking component is provided on the movable block (3); a push plate (7) slidably connected inside the switching block (2), and a prompting rod (8) is fixedly connected to the push plate (7), and the movable block (3) and the push plate (7) are connected by a buffer spring (6).

3. The device for detecting hollow walls in a house according to claim 2, characterized in that, The unlocking component includes: a positioning groove (13) on the movable block (3), a "C"-shaped adjusting rod (14) slidably connected in the positioning groove (13), and a matching groove on the striking head (5) corresponding to the adjusting rod (14).

4. The device for detecting hollow walls in a house according to claim 3, characterized in that, The positioning groove (13) is set in the shape of a "C" and is used to lock or unlock the striking head (5).

5. A device for detecting hollow walls in a house according to claim 1, characterized in that, The telescopic end of the grip (1) is fixedly installed with an installation plate (9). The installation plate (9) and the switching block (2) are rotatably connected by a rotating shaft. A locking groove (10) is provided on the rotating shaft. The installation plate (9) is provided with a matching sliding groove corresponding to the locking groove (10). A locking block (11) is slidably installed in the sliding groove. A return spring (12) is installed in the groove. The two ends of the return spring (12) abut against the locking block (11) and the groove, respectively.

6. The device for detecting hollow walls in a house according to claim 1, characterized in that, The free end of the indicator rod (8) is coated with red or fluorescent color.

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