House building project hollowing detection device

Abstract

The invention discloses a housing construction project hollowing detection device which comprises a shell, a mounting cavity is formed in the shell, a transmission shaft is rotatably mounted in the mounting cavity, a mounting plate is fixedly mounted on the lower surface of the mounting cavity, an eccentric pressing block is fixedly mounted on the surface of the transmission shaft, and a pressing column is slidably mounted in the mounting plate. Knocking heads are slidably mounted at the bottom of the pressing column, a sound sensor module fixedly mounted on the mounting plate is arranged on one side of each knocking head, a rotating shaft is rotatably mounted in the mounting cavity, a cleaning roller is fixedly mounted on the surface of the rotating shaft, and one end of the rotating shaft is in transmission connection with the transmission shaft through a transmission assembly. When knocking sound is detected through the sound sensor module and hollowing sound is detected, the control device controls the corresponding electromagnetic pump to work and marks the hollowing position, the hollowing position can be accurately marked and detected, meanwhile, the cleaning roller is driven to rotate, dust on the detection face is swept forwards, and the detection effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction engineering, and in particular relates to a hollowing detection device for building construction engineering. Background Art

[0002] Hollowing detection in building construction projects refers to the detection of hollowing phenomena between the surface of components such as walls, floors or ceilings and the underlying structure during the construction or later use of the building, in order to ensure the structural quality and safety of the building. Hollowing usually refers to the situation where the bonding between the surface of the component and the underlying structure is not strong, resulting in gaps or holes between the two.

[0003] In the prior art, a Chinese invention patent with patent number CN114674926A discloses a device for detecting hollowing quality of a wall surface of a construction project, which includes a first support rod, a second support rod, a movable block, a hammer head, a suction cup and a fixing mechanism; the hammer head is used to be arranged on the first support rod; the movable block is arranged on the first support rod and can move along the length direction of the first support rod and can rotate relative to the first support rod; the fixing mechanism is used to fix the movable block along the length direction of the first support rod; the suction cup is used to be detachably arranged on the movable block and is located on the same side of the first support rod as the hammer head; the second support rod is connected to the first support rod and is located on the side of the movable block away from the hammer head, the second support rod has a handle portion, the second support rod can be opened or closed relative to the first support rod, and when opened, the handle portion is located on the side of the first support rod away from the hammer head.

[0004] Although the above-mentioned prior art can detect the hollowing phenomenon of the roof and wall of the house more labor-savingly, it still has certain shortcomings: First, the existing technology can only detect the number of hollow drums or the hollow drum rate. After the detection is completed, it is impossible to determine the specific location of the hollow drum point. It often requires manual re-inspection multiple times, which affects the detection efficiency. Secondly, after the inspection is completed, the area with a high hollowing rate can be repaired and maintained, but it is not convenient to repair and maintain the specific hollowing points; Finally, when there is dust on the detection surface, the dust will change the conduction of the knocking sound and increase the difficulty of detection. The existing technology cannot solve the interference of dust and dirt, and the quality of detection cannot be improved. Summary of the invention

[0005] In order to solve the technical problems that only the number of hollow drums or the hollow drum rate can be detected, and the specific hollow drum point position cannot be determined after the detection is completed, the present invention provides a hollow drum detection device for building construction projects.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a hollowing detection device for building construction engineering, comprising a shell, an installation cavity is provided inside the shell, a transmission shaft is rotatably installed inside the installation cavity, and an installation plate is fixedly installed on the lower surface of the installation cavity, A plurality of eccentric pressing blocks are fixedly mounted on the surface of the transmission shaft, a plurality of pressing columns used in conjunction with the pressing blocks are slidably mounted inside the mounting plate, and a striking head is slidably mounted on the bottom of the pressing column. A sound sensor module is fixedly mounted on a mounting plate on one side of each of the striking heads. A spray box is fixedly installed inside the installation cavity, an electromagnetic pump is fixedly installed on one side of the spray box, and the outlet end of the electromagnetic pump is connected to a conduit that passes through the knocking head. A rotating shaft is rotatably mounted inside the mounting cavity, a cleaning roller is fixedly mounted on the surface of the rotating shaft, and one end of the rotating shaft is transmission-connected to the transmission shaft through a transmission assembly.

[0007] Optionally, a fixing block is fixedly mounted on the top end of the pressure column, and a first spring penetrating the pressure column is fixedly mounted between the lower surface of the fixing block and the upper surface of the mounting plate.

[0008] Optionally, a telescopic rod is slidably installed inside the pressure column, a second spring is fixedly installed on the top end of the telescopic rod, and the striking head is fixedly installed on the bottom end of the telescopic rod.

[0009] Optionally, the transmission assembly includes a second pulley fixedly mounted on one end of the rotating shaft and a first pulley fixedly mounted on one end of the transmission shaft, and the first pulley is connected to the second pulley via a belt transmission.

[0010] Optionally, a control device is fixedly installed on the lower surface of the spray box, and the control device includes a shell, a support plate is slidably installed inside the shell, a third spring is fixedly installed on the lower surface of the support plate, damping blocks are fixedly installed at both ends of the third spring, a silicone pad is fixedly installed on the upper surface of the support plate, and a single-chip microcomputer is installed inside the silicone pad.

[0011] Optionally, a circle of slots is provided on the upper surface of the shell, a top cover is inserted into the slot, a sealing strip is fixedly installed on the lower surface of the top cover, a pressure plate is fixedly installed on the lower surface of the top cover, and heat dissipation holes are provided on both sides of the shell.

[0012] Optionally, two sets of front and rear running wheels are rotatably installed on both sides of the shell, a connecting shaft is fixedly installed between the rear running wheels, an electric cylinder is fixedly installed on one side of the connecting shaft, an electric suction cup is fixedly installed on the top of the output end of the electric cylinder, and an arc-shaped friction block is fixedly installed on one side of the output end of the electric cylinder.

[0013] Optionally, the surface of the striking head is wrapped with a soft cloth layer.

[0014] Optionally, symmetrical mounting seats are fixedly mounted on the upper surface of the shell, a gear is rotatably mounted between the two mounting seats, a vertical rod is fixedly mounted on the upper surface of the gear, and a grip rod is threadedly connected to the top of the vertical rod.

[0015] Optionally, a limit shaft is rotatably installed on one side of the mounting seat, an eccentrically arranged cam is fixedly installed on one end of the limit shaft, the surface of the cam is provided with teeth that mesh with the gear, and a knob is fixedly installed on the other end of the limit shaft, and limit holes are provided on the surfaces of the knob and the mounting seat, and pins are inserted between the limit holes.

[0016] In summary, compared with the prior art, the hollowing detection device for building construction provided by the present invention has the following beneficial effects: 1. In the present invention, the motor drives the transmission shaft connected thereto to rotate, and the rotation of the transmission shaft drives the eccentric pressure block to rotate at the same time, so that the pressure block intermittently squeezes the pressure column. By using the first spring, when the pressure column is not squeezed by the pressure block, the first spring resets the pressure column, and then the pressure column moves reciprocatingly downward, driving the knocking head to knock the detection surface, and performing hollowing detection on the detection surface. Since the hollowing will make the detection surface uneven, the knocking head is slidably connected to the pressure column through the telescopic rod. By using the second spring, the knocking head can have a telescopic function, so that when knocking on the hollow, the knocking head shrinks to prevent the detection surface of the bulge from being broken, causing material waste; 2. In the present invention, the sound sensor module detects the knocking sound. When the sound of the hollow drum is detected, the signal is fed back to the control device. At this time, the control device controls the corresponding electromagnetic pump to work, sprays the paint from the conduit, and marks the hollow drum. The hollow drum can be accurately marked without deviation, thereby improving the accuracy of detection; 3. In the present invention, when the hollow drum detection is performed, the transmission shaft rotates, and the rotation of the transmission shaft drives the first pulley to rotate, and then the second pulley is driven to rotate through the belt, thereby driving the rotation shaft to rotate, and then the cleaning roller rotates to sweep the dust on the detection surface forward, thereby improving the detection effect; 4. In the present invention, the soft cloth layer can not only reduce the damage to the detection surface when knocking, but also reduce the noise generated by knocking, thereby reducing the interference to the surrounding environment; 5. In the present invention, when hollow drum is detected, the output end of the electric cylinder extends, so that the electric suction cup is sucked on the detection surface, and the friction block is pressed on the connecting shaft, so that the running wheel stops rotating, and the shell is positioned and stopped from moving forward, so as to further enhance the accuracy of detection, and at the same time, it is helpful to suck the equipment on the wall and ceiling, and there is no need for the inspector to press on the detection surface to mark, thereby reducing the labor intensity of the inspector; 6. In the present invention, the silicone pad can effectively fix the single-chip microcomputer to prevent it from being damaged in a vibration environment, and has a good shockproof effect. At the same time, it has good thermal conductivity, can effectively transfer heat, help the single-chip microcomputer dissipate heat, and maintain its normal working temperature; 7. In the present invention, the gear is driven to rotate by the vertical rod to adjust the angle between the gear and the shell, so as to facilitate the shell to move forward for hollowing detection and improve the use effect. After the angle adjustment is completed, the shell rotates the knob to make the cam and the gear engage for limiting. Finally, the pin is inserted into any group of limiting holes for limiting. The inspector pushes the shell forward for detection by holding the rod, so that the equipment can detect any wall surface, which is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the installation chamber of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the shell of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle; Figure 5 It is a schematic diagram of the structure of the transmission assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the knocking head of the present invention; Figure 7 This is a schematic diagram of the structure of the control device of the present invention; Figure 8 This is a schematic diagram of the internal structure of the control device of the present invention; Fig. 9 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Fig.10 This is a schematic diagram of the grip structure of the present invention; In the figure: 1, housing; 2, walking wheel; 3, installation cavity; 4, motor; 5, transmission shaft; 6, pressure block; 7, installation plate; 8, pressure column; 9, fixing block; 10, first spring; 11, telescopic rod; 12, second spring; 13, knocking head; 14, soft cloth layer; 15, spray box; 16, control device; 161, casing; 162, support plate; 163, third spring; 164, silicone pad; 165, single chip microcomputer; 166, slot; 167, top cover; 168, sealing strip; 169, pressure plate; 170, loose Heat hole; 17, electromagnetic pump; 18, catheter; 19, sound sensor module; 20, rotating shaft; 21, cleaning roller; 22, first pulley; 23, second pulley; 24, belt; 25, baffle; 26, battery; 27, connecting shaft; 28, electric cylinder; 29, electric suction cup; 30, friction block; 31, indicator light; 32, buzzer; 33, mounting seat; 34, gear; 35, vertical rod; 36, limit shaft; 37, knob; 38, cam; 39, limit hole; 40, pin; 41, grip; 42, threaded groove. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Embodiment 1:

[0019] refer to Figure 1 and Figure 2 A hollowing detection device for building construction projects includes a shell 1, two sets of front and rear walking wheels 2 are rotatably installed on both sides of the shell 1, and an installation cavity 3 is opened inside the shell 1, and a battery 26 is fixedly installed at one end of the installation cavity 3.

[0020] refer to Figure 1 and Fig. 9 A symmetrical mounting seat 33 is fixedly installed on the upper surface of the shell 1, a gear 34 is rotatably installed between the two mounting seats 33, a vertical rod 35 is fixedly installed on the upper surface of the gear 34, a limiting shaft 36 is rotatably installed on one side of the mounting seat 33, an eccentrically arranged cam 38 is fixedly installed on one end of the limiting shaft 36, and the surface of the cam 38 is provided with teeth meshing with the gear 34, and a knob 37 is fixedly installed on the other end of the limiting shaft 36, and a plurality of circumferential array limiting holes 39 are opened on the surface of the knob 37 and the mounting seat 33, and a pin 40 is inserted between each group of limiting holes 39.

[0021] Furthermore, when in use, the inspector can rotate the vertical rod 35 so that the vertical rod 35 drives the gear 34 to rotate, and adjust the angle between the vertical rod 35 and the shell 1, so that the inspector can push the shell 1 forward to perform hollow drum detection and improve the use effect. When the angle adjustment is completed, the shell rotates the knob 37 so that the cam 38 engages with the gear 34 for limiting the position, and finally the pin 40 is inserted into any group of limiting holes 39 for limiting the position.

[0022] refer to Figure 1 and Fig.10 The top of the vertical rod 35 is threadedly connected to the grip rod 41, and the top of the vertical rod 35 is provided with a thread, and the bottom end of the grip rod 41 is provided with a thread groove 42 used in conjunction with the thread. The grip rod 41 can be rotated to adjust the length between the grip rod 41 and the vertical rod 35 by the length of the screwed thread of the thread groove 42, so as to facilitate use by testers of different heights and improve the use effect.

[0023] Furthermore, when in use, the inspector pushes the housing 1 forward through the grip 41 to perform inspection, so that the device can inspect any wall surface, which is practical. Embodiment 2:

[0024] refer to Figure 2-Figure 4 A motor 4 is fixedly installed inside the installation cavity 3 and on one side close to the front walking wheel 2. A transmission shaft 5 is rotatably installed between the output end of the motor 4 and the inner wall of the installation cavity 3. A plurality of eccentrically arranged pressure blocks 6 are fixedly installed on the surface of the transmission shaft 5, and the pressure blocks 6 are arranged in an elliptical shape.

[0025] refer to Figure 2-Figure 4 A mounting plate 7 used in conjunction with the transmission shaft 5 is fixedly installed on the lower surface of the mounting cavity 3, and a pressure column 8 used in conjunction with the pressure block 6 is slidably installed inside the mounting plate 7. The top of the pressure column 8 is hemispherical, and a fixing block 9 is fixedly installed on the surface of the pressure column 8 and near the top, and a first spring 10 penetrating the pressure column 8 is fixedly installed between the lower surface of the fixing block 9 and the upper surface of the mounting plate 7.

[0026] refer to Figure 4 and Figure 6 A cavity is provided at the bottom of the pressure column 8, and a telescopic rod 11 is slidably installed inside the cavity. A second spring 12 is fixedly installed between the top of the telescopic rod 11 and the inner wall of the top of the cavity, and a knocking head 13 is fixedly installed at the bottom of the telescopic rod 11 for knocking the detection surface. The hollow part of the detection surface is detected according to the different knocking sounds. The surface of the knocking head 13 is wrapped with a soft cloth layer 14, which can reduce the damage to the detection surface during knocking and reduce the noise generated by knocking, thereby reducing the interference to the surrounding environment.

[0027] Furthermore, when in use, the motor 4 drives the transmission shaft 5 connected thereto to rotate, and the rotation of the transmission shaft 5 drives the eccentric pressure block 6 to rotate at the same time, so that the pressure block 6 intermittently squeezes the pressure column 8. Through the use of the first spring 10, when the pressure column 8 is not squeezed by the pressure block 6, the first spring 10 will drive the pressure column 8 to reset, and then the pressure column 8 moves reciprocatingly downward, driving the knocking head 13 to knock the detection surface, and perform hollow detection on the detection surface. Since the hollow area will make the detection surface uneven, the knocking head 13 is slidably connected to the pressure column 8 through the telescopic rod 11. Through the use of the second spring 12, the knocking head 13 can have a telescopic function, so that when knocking on the hollow area, the knocking head 13 contracts to prevent the detection surface of the bulge from being broken, thereby reducing material waste.

[0028] refer to Figure 2 and Figure 4 A spray box 15 is fixedly installed in the middle of the installation cavity 3, and a control device 16 electrically connected to the battery 26 is fixedly installed on the lower surface of the spray box 15, and an electromagnetic pump 17 with the same number as the knocking head 13 is fixedly installed on one side of the spray box 15. The electromagnetic pump 17 is a prior art and is not disclosed in detail here. The electromagnetic pump 17 is electrically connected to the battery 26, and the outlet end of the electromagnetic pump 17 is connected to a conduit 18. The conduit 18 runs through the interior of the telescopic rod 11 and the knocking head 13, and the outlet end of the conduit 18 is located directly below the knocking head 13. A sound sensor module 19 used in conjunction with the knocking head 13 is fixedly installed on the lower surface of the mounting plate 7, which is used to detect the knocking sound to determine whether there is a hollow drum. The sound sensor module 19 is a prior art and is not disclosed in detail here. The sound sensor module 19 is electrically connected to the control device 16.

[0029] Furthermore, when in use, the sound sensor module 19 detects the knocking sound. When the sound of a hollow drum is detected, the signal is fed back to the control device 16. At this time, the control device 16 controls the corresponding electromagnetic pump 17 to work, sprays paint from the conduit 18, and marks the hollow drum. The hollow drum can be marked accurately without deviation, thereby improving the accuracy of detection.

[0030] refer to Figure 2-Figure 5 A rotating shaft 20 is fixedly installed inside the installation cavity 3 and on one side of the transmission shaft 5. A cleaning roller 21 is fixedly installed on the surface of the rotating shaft 20, which is used to remove dust on the surface of the detection surface. If there is dust when the detection surface is knocked, the dust will change the conduction of the knocking sound and increase the difficulty of detection. One end of the rotating shaft 20 is connected to the transmission shaft 5 through a transmission assembly. A baffle 25 used in conjunction with the cleaning roller 21 is fixedly installed at the bottom of the installation cavity 3 to prevent dust from entering the installation cavity 3.

[0031] refer to Figure 5The transmission assembly includes a second pulley 23 fixedly mounted at one end of the rotating shaft 20 and a first pulley 22 fixedly mounted at one end of the transmission shaft 5 , and the first pulley 22 and the second pulley 23 are connected via a belt 24 .

[0032] Furthermore, when performing hollow drum detection, the transmission shaft 5 rotates, and the rotation of the transmission shaft 5 drives the first pulley 22 to rotate, and then drives the second pulley 23 to rotate through the belt 24, thereby driving the rotating shaft 20 to rotate, and then the cleaning roller 21 rotates to sweep the dust on the detection surface forward, thereby improving the detection effect.

[0033] refer to Figure 5 An indicator light 31 and a buzzer 32 electrically connected to the control device 16 are fixedly installed on the upper surface of the shell 1. When hollowness is detected on the detection surface, the indicator light 31 flashes and the buzzer 32 sounds an alarm to remind the detector that there is a hollowness here. The detector stops moving forward and waits for the spray box 15 to mark. After the marking is completed, the indicator light 31 stops flashing, and the detector continues to move forward for detection.

[0034] refer to Figure 2 and Figure 3 A connecting shaft 27 is fixedly installed between the rear walking wheels 2 inside the installation cavity 3, and an electric cylinder 28 is fixedly installed inside the installation cavity 3 and on one side of the connecting shaft 27. The electric cylinder 28 is a prior art and is not disclosed in detail herein. The electric cylinder 28 is electrically connected to the control device 16, and an electric suction cup 29 is fixedly installed on the top of the output end of the electric cylinder 28. The electric suction cup 29 is a prior art and is not disclosed in detail herein. A friction block 30 used in conjunction with the connecting shaft 27 is fixedly installed on one side of the output end of the electric cylinder 28, and the lower surface of the friction block 30 is arranged in an arc shape.

[0035] Furthermore, when hollowness is detected, the output end of the electric cylinder 28 extends out, so that the electric suction cup 29 is sucked onto the detection surface, and at the same time the friction block 30 is pressed onto the connecting shaft 27, so that the walking wheel 2 stops rotating and the shell 1 is positioned to stop moving forward, thereby further enhancing the accuracy of detection and helping to suck the equipment onto the wall and ceiling. There is no need for the inspector to press on the detection surface to mark, thereby reducing the inspector's labor intensity. Embodiment three:

[0036] refer to Figure 7 and Figure 8The control device 16 includes a casing 161, and a support plate 162 is slidably installed inside the casing 161. A third spring 163 is fixedly installed between the lower surface of the support plate 162 and the upper surface of the bottom of the inner cavity of the casing 161, and damping blocks are fixedly installed at both ends of the third spring 163. A silicone pad 164 is fixedly installed on the upper surface of the support plate 162, and a single-chip computer 165 is installed inside the silicone pad 164. The single-chip computer 165 is a prior art and is not disclosed in detail herein. The silicone pad 164 can effectively fix the single-chip computer 165 to prevent it from being damaged in a vibration environment, and has a good shockproof effect. At the same time, it has good thermal conductivity, can effectively transfer heat, help the single-chip computer 165 to dissipate heat, and maintain its normal operating temperature. When the hollow drum is struck and detected, the device will vibrate. The use of the third spring 163 and the damping block further enhances the shockproof effect.

[0037] refer to Figure 8 A circle of slots 166 are provided on the upper surface of the casing 161, and a top cover 167 is inserted inside the slots 166. A sealing strip 168 used in conjunction with the slots 166 is fixedly installed on the lower surface of the top cover 167 to prevent the single-chip computer 165 from dust and prevent dust from affecting the use of the single-chip computer 165. A pressing plate 169 is fixedly installed on the lower surface of the top cover 167 to fix the single-chip computer 165. The pressing plate 169 is made of silicone. Heat dissipation holes 170 are provided on both sides of the casing 161. The inside of the heat dissipation holes 170 is sealed with a dustproof net to prevent dust from entering while ensuring the heat dissipation effect.

[0038] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0039] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0040] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A hollowing detection device for building construction, characterized in that: It comprises a housing (1), wherein a mounting cavity (3) is provided inside the housing (1), a transmission shaft (5) is rotatably mounted inside the mounting cavity (3), and a mounting plate (7) is fixedly mounted on the lower surface of the mounting cavity (3); A plurality of eccentric pressing blocks (6) are fixedly mounted on the surface of the transmission shaft (5); a plurality of pressing columns (8) used in conjunction with the pressing blocks (6) are slidably mounted inside the mounting plate (7); a striking head (13) is slidably mounted at the bottom of the pressing column (8); A sound sensor module (19) fixedly mounted on a mounting plate (7) is provided on one side of each of the striking heads (13); A spray box (15) is fixedly installed inside the installation cavity (3), an electromagnetic pump (17) is fixedly installed on one side of the spray box (15), and an outlet end of the electromagnetic pump (17) is connected to a conduit (18) that passes through the knocking head (13); A rotating shaft (20) is rotatably mounted inside the mounting cavity (3), a cleaning roller (21) is fixedly mounted on the surface of the rotating shaft (20), and one end of the rotating shaft (20) is transmission-connected to a transmission shaft (5) via a transmission assembly.

2. A hollowing detection device for building construction according to claim 1, characterized in that: A fixing block (9) is fixedly mounted on the top of the pressure column (8), and a first spring (10) penetrating the pressure column (8) is fixedly mounted between the lower surface of the fixing block (9) and the upper surface of the mounting plate (7).

3. A hollowing detection device for building construction according to claim 1, characterized in that: A telescopic rod (11) is slidably mounted inside the pressure column (8), a second spring (12) is fixedly mounted on the top end of the telescopic rod (11), and the striking head (13) is fixedly mounted on the bottom end of the telescopic rod (11).

4. The hollowing detection device for building construction according to claim 1 is characterized in that: The transmission assembly comprises a second pulley (23) fixedly mounted on one end of a rotating shaft (20) and a first pulley (22) fixedly mounted on one end of a transmission shaft (5); the first pulley (22) and the second pulley (23) are connected to each other via a belt (24).

5. The hollowing detection device for building construction according to claim 1 is characterized in that: A control device (16) is fixedly mounted on the lower surface of the spray box (15), and the control device (16) comprises a casing (161), a support plate (162) is slidably mounted inside the casing (161), a third spring (163) is fixedly mounted on the lower surface of the support plate (162), damping blocks are fixedly mounted at both ends of the third spring (163), a silicone pad (164) is fixedly mounted on the upper surface of the support plate (162), and a single-chip computer (165) is mounted inside the silicone pad (164).

6. A hollowing detection device for building construction according to claim 5, characterized in that: The upper surface of the casing (161) is provided with a circle of slots (166), a top cover (167) is inserted into the interior of the slots (166), a sealing strip (168) is fixedly installed on the lower surface of the top cover (167), and a pressure plate (169) is fixedly installed on the lower surface of the top cover (167), and heat dissipation holes (170) are provided on both sides of the casing (161).

7. The hollowing detection device for building construction according to claim 1, characterized in that: Two sets of front and rear running wheels (2) are rotatably mounted on both sides of the housing (1), a connecting shaft (27) is fixedly mounted between the rear running wheels (2), an electric cylinder (28) is fixedly mounted on one side of the connecting shaft (27), an electric suction cup (29) is fixedly mounted on the top of the output end of the electric cylinder (28), and an arc-shaped friction block (30) is fixedly mounted on one side of the output end of the electric cylinder (28).

8. The hollowing detection device for building construction according to claim 3 is characterized in that: The surface of the striking head (13) is wrapped with a soft cloth layer (14).

9. The hollowing detection device for building construction according to claim 7, characterized in that: Symmetrical mounting seats (33) are fixedly mounted on the upper surface of the housing (1), a gear (34) is rotatably mounted between the two mounting seats (33), a vertical rod (35) is fixedly mounted on the outer surface of the gear (34), and a gripping rod (41) is threadedly connected to the top of the vertical rod (35).

10. A hollowing detection device for building construction according to claim 9, characterized in that: A limiting shaft (36) is rotatably mounted on one side of the mounting seat (33); an eccentrically arranged cam (38) is fixedly mounted on one end of the limiting shaft (36); a surface of the cam (38) is provided with teeth meshing with the gear (34); a knob (37) is fixedly mounted on the other end of the limiting shaft (36); limiting holes (39) are provided on the surfaces of the knob (37) and the mounting seat (33); and a pin (40) is inserted between the limiting holes (39).

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