A building wall flaw detection device and detection method

Abstract

The present application provides a building wall flaw detection device and a detection method, belonging to the technical field of building flaw detection. The device includes a drone with a flaw detection probe at its front end. A push rod is provided at the bottom of the drone. The storage part includes a storage cylinder, in which a turntable is provided. A limiting cylinder is arranged on the turntable, and the center of the limiting cylinder is located outside the turntable. A spring is provided on the inner bottom surface of the limiting cylinder, and at its upper end, there is a paint bottle with an opening facing downwards. A partition piece is provided at the opening of the paint bottle; the marking part includes a guiding tube, on which a diversion cylinder is vertically provided. The upper end of the diversion cylinder is inserted into a through hole. A marking member is movably arranged along the length direction in the guiding tube to obtain the temporarily stored paint for marking. The method includes using the above-mentioned building wall flaw detection device for flaw detection. The solution provided by the present application is not only applicable to buildings with relatively high heights, but also can divide the paint into multiple portions, and can automatically replace the paint bottle, and can timely seal the unused paint to reduce the change rate of the paint performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of building flaw detection, and particularly relates to a building wall flaw detection device and a detection method. Background Art

[0002] Building wall flaw detection is not only to ensure the safety and stability of buildings, but also to facilitate the optimization of daily maintenance and management, and to ensure the safety of residents' lives and property.

[0003] The existing building wall flaw detection devices have complex structures. When the height of the building to be detected is relatively high, rope hoisting is required, resulting in poor stability. Therefore, drones are mostly used. The required marking paints are placed in the same storage box and then carried on the drones, causing all the paints to be exposed to the air for a long time, resulting in rapid evaporation of the paint moisture, easy drying and hardening, affecting the spraying effect, and wasting paint. Summary of the Invention

[0004] To solve the above deficiencies of the prior art, the present invention provides a building wall flaw detection device and a detection method, which are not only applicable to buildings with relatively high heights, but also can divide the paint into multiple portions, automatically replace the paint bottles, and timely seal the unused paint, reducing the rate of change of paint performance.

[0005] To achieve the purpose of the present invention, the following scheme is proposed:

[0006] A building wall flaw detection device includes a drone with a flaw detection probe at its front end. A push rod is vertically provided at the bottom of the drone. The device further includes:

[0007] A storage part, including a storage cylinder provided at the bottom of the drone. A through hole corresponding to the push rod is provided at its bottom. A turntable is coaxially rotatably provided in the storage cylinder. A plurality of limiting cylinders are circumferentially arranged thereon. The center of gravity of the limiting cylinder is located outside the turntable. The distance between the center of the limiting cylinder and the center of the turntable is the same as the distance between the center of the through hole and the center of the bottom of the storage cylinder. A spring is provided on the inner bottom surface of the limiting cylinder, and a paint bottle with a downward opening is vertically inserted therein. A partition sheet is provided at the opening of the paint bottle, and the size of the partition sheet is smaller than the size of the through hole.

[0008] A marking part, including a guiding tube horizontally provided below the storage cylinder. A guiding cylinder is vertically provided on the guiding tube and its upper end is inserted into the through hole for obtaining and temporarily storing the paint from the paint bottle. A marking member is movably arranged along the length direction in the guiding tube for opening the guiding cylinder and obtaining the temporarily stored paint for marking.

[0009] Further, a spike portion is provided at the upper opening of the draft tube, and the draft tube is inserted into the through hole. The upper end of the spike portion is inclined. The lower end of the draft tube extends into the guide tube. The bottom of the draft tube is provided with discharge holes in a circumferential array. A sealing plug is rotatably provided at the center of the bottom of the draft tube. Rubber plugs corresponding to the discharge holes one by one are provided on the top surface of the sealing plug. A tension spring is provided between one side of the sealing plug and one side of the bottom of the draft tube. A receiving groove is provided on the bottom surface of the sealing plug. A guide pin is provided in the receiving groove. The upper end of the guide pin is rotatably connected to the receiving groove. The marking member includes a moving seat with an inverted L-shaped structure. An inclined groove is provided on the top surface of the horizontal portion of the moving seat for pushing the lower end of the guide pin to open the discharge hole. A U-shaped groove is provided on one side of the inclined groove, and the rear end of the inclined groove faces the U-shaped groove. The opening of the U-shaped groove faces the outlet end of the guide tube. A sponge pad is provided at the inner right angle of the moving seat for absorbing the paint in the U-shaped groove.

[0010] Further, the upper end of the push rod is connected to the movable end of the first cylinder vertically arranged inside the drone. A push plate is provided at the lower end of the push rod. The outer dimension of the push plate is smaller than the inner diameter dimension of the limiting cylinder. A convex edge extending into its interior is provided at the upper end of the storage cylinder. A rotating shaft is connected to the center of the turntable. A motor is provided at the upper end of the rotating shaft. The motor is arranged inside the drone. A pressing plate is spirally sleeved on the upper part of the rotating shaft. The distance between the pressing plate and the convex edge is greater than the outer diameter of the push plate.

[0011] Further, an annular seat is provided inside the bottom surface of the storage cylinder. The through hole is located inside the annular seat. An annular groove is recessed at the top of the annular seat. Cylindrical rollers are provided in the annular groove. The cylindrical rollers are in rolling contact with the bottom of the limiting cylinder.

[0012] Further, positioning pins are provided on the turntable in a circumferential array. An annular plate is provided at the bottom of the limiting cylinder. Connecting holes are provided on the annular plate. The connecting holes are adapted to the positioning pins. The lower end of the spring is provided on the annular plate.

[0013] Further, the spring is of a cylindrical structure, and the inner wall dimension of the spring is greater than the inner diameter of the annular plate.

[0014] Further, a sleeve is sleeved on the outer wall of the guide pin. The width of the inclined groove matches the outer diameter dimension of the sleeve.

[0015] Further, a strip-shaped platform is provided on one side of the U-shaped groove. One surface of the strip-shaped platform is flush with the opening of the U-shaped groove. The front end of the inclined groove communicates with one surface of the strip-shaped platform. The rear end of the inclined groove communicates with the other surface of the strip-shaped platform, and the rear end of the inclined groove inclines towards the U-shaped groove.

[0016] Further, a mounting plate is provided at the other end of the guide tube. A second cylinder is provided on the mounting plate. The output end of the second cylinder is connected to the outside of the vertical portion of the moving seat. Support plates are respectively provided vertically on both sides of the mounting plate. The upper ends of the support plates are connected to the drone.

[0017] A method for detecting flaws in a building wall using the building wall flaw detection device includes the following steps:

[0018] S1. Insert the paint bottles into the corresponding limiting cylinders in sequence, and insert the openings of the paint bottles downward into the upper ends of the corresponding springs in the limiting cylinders.

[0019] S2. Start the push rod to move vertically downward so that the upper end of the diversion cylinder is inserted into the through hole, and obtain and temporarily store the paint from the paint bottle.

[0020] S3. Start the drone and simultaneously start the flaw detection probe to detect the building wall. When a defect is found, the drone hovers in place and starts the marking member to move along the guide tube to open the lower end of the diversion cylinder and obtain the temporarily stored paint to mark the defect.

[0021] The beneficial effects of the present invention are as follows:

[0022] The paint is respectively filled into the paint bottles, which is convenient for the storage of the paint and avoids the evaporation and aging of the moisture in the paint. When in use, it can be opened one by one, and the opened paint flows into the diversion cylinder for sealed temporary storage. When marking, the guide pin is pushed by the inclined groove to open the diversion cylinder, so that part of the paint flows out. When the guide pin moves past the inclined groove, the discharge hole at the bottom of the diversion cylinder is automatically closed under the action of the tension spring, and the paint flowing out of the paint bottle can still be temporarily stored and sealed in the diversion cylinder, so as to minimize the change rate of the physical and chemical properties of the paint. Description of the Drawings

[0023] The drawings described herein are only for illustrating the selected embodiments, not all possible implementation schemes, and are not intended to limit the scope of the present invention.

[0024] Figure 1 Shows the external structural schematic diagram of the present application.

[0025] Figure 2 Shows the cross-sectional schematic diagram of the present application along the length direction of the guide tube.

[0026] Figure 3 Shows the Figure 2 Local enlarged schematic diagram at A of the present application.

[0027] Figure 4 Shows the Figure 2 Local enlarged schematic diagram at B of the present application.

[0028] Figure 5 Shows the overall structural schematic diagram of the storage cylinder of the present application.

[0029] Figure 6 Shows the three-dimensional structural schematic diagram of the diversion cylinder and the marking member of the present application.

[0030] Figure 7The schematic diagram of the bottom structure of the sealing plug of the present application is shown.

[0031] Figure 8 The schematic diagram of the top structure of the sealing plug of the present application is shown.

[0032] Figure 9 The three-dimensional structure schematic diagram of the marking member of the present application is shown.

[0033] Markings in the figure: unmanned aerial vehicle - 1, flaw detection probe - 11, push rod - 12, first cylinder - 121, push plate - 122, material storage part - 2, material storage cylinder - 21, through hole - 211, convex edge - 212, annular seat - 213, annular groove - 214, cylindrical roller - 215, vertical plate - 216, turntable - 22, rotating shaft - 221, motor - 222, pressing plate - 223, positioning pin - 224, limiting cylinder - 23, annular plate - 231, spring - 24, pigment bottle - 25, partition sheet - 251, marking part - 3, guiding tube - 31, guiding cylinder - 32, spiked part - 321, discharge hole - 322, sealing plug - 33, rubber plug - 331, accommodating groove - 332, guiding pin - 333, sleeve - 334, tension spring - 34, marking member - 35, moving seat - 351, inclined groove - 352, U-shaped groove - 353, sponge pad - 354, strip-shaped platform - 355, mounting plate - 36, support plate - 361, second cylinder - 37. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following describes the embodiments of the present invention in detail with reference to the accompanying drawings. However, the embodiments described herein are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Embodiment 1

[0036] As Figures 1-9 shown, this embodiment provides a building wall flaw detection device for detecting building wall flaws and marking the defective positions for workers to process. The device includes: an unmanned aerial vehicle 1, a material storage part 2, and a marking part 3 arranged in sequence from top to bottom.

[0037] As Figures 1-5 shown, a flaw detection probe 11 is provided at the front end of the unmanned aerial vehicle 1 for detecting building wall defects.

[0038] A push rod 12 is vertically provided at the bottom of the unmanned aerial vehicle 1. The upper end of the push rod 12 is connected to the first cylinder 121, and the lower end is connected to the push plate 122.

[0039] The material storage part 2 includes a material storage cylinder 21, a turntable 22, a limiting cylinder 23, a spring 24, and a pigment bottle 25.

[0040] The material storage cylinder 21 is provided at the bottom of the drone 1, and there is a predetermined distance between the top surface of the material storage cylinder 21 and the bottom of the drone 1. A through hole 211 is provided on the bottom surface of the material storage cylinder 21, and the through hole 211 corresponds to the center of the push plate 122. An annular seat 213 is concentrically provided on the inner bottom surface of the material storage cylinder 21. The outer wall of the annular seat 213 has the same diameter as the inner wall of the material storage cylinder 21. A downwardly concave annular groove 214 is provided at the top of the annular seat 213, and cylindrical rollers 215 are provided in the annular groove 214; a convex edge 212 protruding inward is provided at the top of the material storage cylinder 21. Vertical plates 216 are respectively provided on both sides of the outer wall of the material storage cylinder 21, and the upper ends of the vertical plates 216 are respectively connected to both sides of the bottom surface of the drone 1, and the lower ends are connected to the bottom of the outer wall of the material storage cylinder 21.

[0041] The turntable 22 is concentrically provided in the material storage cylinder 21. A rotating shaft 221 is vertically provided on the top surface of the turntable 22. The upper end of the rotating shaft 221 passes through the drone 1 and is connected to a motor 222. The motor 222 is installed in the drone 1. There is a predetermined distance between the bottom surface of the drone 1 and the top of the material storage cylinder 21. A pressing plate 223 is in threaded cooperation with the rotating shaft 221. The pressing plate 223 is coaxially arranged with the rotating shaft 221. Positioning pins 224 are arranged in a circumferential array on the turntable 22.

[0042] The limiting cylinder 23 is provided in the material storage cylinder 21. The inner diameter of the limiting cylinder 23 is larger than the outer wall size of the push plate 122. An annular plate 231 is provided at the bottom of the limiting cylinder 23. Connecting holes matching the positioning pins 224 are provided on the annular plate 231. Thus, each positioning pin 224 inserts a limiting cylinder 23, and the outer walls of adjacent two limiting cylinders 23 are in mutual contact, so that the limiting cylinders 23 are arranged in a circumferential array on the turntable 22. And the center of the annular plate 231 is located between the outer side of the turntable 22 and the inner wall of the material storage cylinder 21, and the center of the distribution track of the annular plate 231 is tangent to the connection line between the center of the push plate 122 and the through hole 211.

[0043] The spring 24 is provided in the limiting cylinder 23, and the lower end of the spring 24 is connected to the top surface of the annular plate 231. The spring 24 has a cylindrical structure, and its inner diameter size is larger than the inner diameter size of the annular plate 231.

[0044] The paint bottle 25 is used for storing paint. The bottle mouth of the paint bottle 25 has an inverted frustum structure, and a partition piece 251 is provided at the bottle mouth. The partition piece 251 is made of pierceable aluminum foil. When in use, the paint bottle 25 is placed with the bottle mouth downward and is vertically inserted into the corresponding limiting cylinder 23 along the upper end of the spring 24.

[0045] As Figures 2-4 shown, the marking part 3 includes a guide pipe 31, a diversion pipe 32, a sealing plug 33, a tension spring 34, a marking piece 35, a mounting plate 36, and a second cylinder 37. The guide pipe 31 is horizontally arranged below the material storage cylinder 21 along the length direction of the drone. For the convenience of installation, the guide pipe 31 is set as a pipe fitting with a rectangular cross-section structure.

[0046] The diversion pipe 32 is vertically arranged above the guiding pipe 31 and is communicated with the guiding pipe 31. The axis of the diversion pipe 32 is collinear with the axis of the through hole 211. A spike part 321 is arranged at the top of the diversion pipe 32. The spike part 321 vertically extends upward into the through hole 211 and is used for piercing the partition sheet 251 when the pigment bottle 25 moves vertically downward, so that the pigment flows out along the diversion pipe 32.

[0047] As Figures 6-8 As shown, the bottom of the diversion pipe 32 is hermetically arranged. Discharge holes 322 are arranged in a circumferential array at the bottom of the diversion pipe 32. The sealing plug 33 is of an annular structure and is provided with rib plates in a radial array. At the top of one end of each rib plate, a rubber plug 331 protrudes upward. The rubber plugs 331 correspond to the discharge holes 322 one by one and are used for sealing the discharge holes 322. A receiving groove 332 is arranged on the bottom surface of the sealing plug 33. The length direction of the receiving groove 332 is parallel to the length direction of the guiding pipe 31. A guiding pin 333 is vertically arranged at the outlet end of the receiving groove 332 facing the guiding pipe 31. The upper end of the guiding pin 333 is rotatably connected to the inner side walls of both sides of the receiving groove 332.

[0048] A first connecting pin is vertically arranged at the bottom of the diversion pipe 32. A second connecting pin is vertically arranged on one side of the sealing plug 33 corresponding to the rotation axis of the guiding groove 333. The second connecting pin is located in front of the first connecting pin. Both ends of a tension spring 34 are respectively connected to the first connecting pin and the second connecting pin.

[0049] As Figure 9 As shown, a marking member 35 is arranged in the guiding pipe 31. The marking member 35 includes a moving seat 351, a sponge pad 354, and a strip-shaped platform 355. The moving seat 351 is of an inverted L-shaped structure. The sponge pad 354 is arranged at the inner right angle of the moving seat 351 and protrudes outward by a predetermined length, so that the left and right sides and the bottom surface of the sponge pad 354 are respectively abutted against the corresponding left and right sides and the inner bottom surface of the guiding pipe 31. A U-shaped groove 353 is arranged on the top surface of the horizontal part of the moving seat 351. The opening of the U-shaped groove 353 faces the outlet end of the guiding pipe 31. The lengths of the two arms of the U-shaped groove 353 are the same as the top width of the moving seat 351. One side arm of the U-shaped groove 353 is flush with one side of the horizontal part of the moving seat 351. A strip-shaped platform 355 is vertically arranged on one side of the other arm of the U-shaped groove 353. One surface of the strip-shaped platform 355 is flush with the opening of the U-shaped groove 353. An inclined groove 352 is arranged on the strip-shaped platform 355 and penetrates through the top surface of the strip-shaped platform 355. One end of the inclined groove 352 corresponds to the lower end of the guiding pin 333, and the other end extends towards the U-shaped groove 353. The width of the strip-shaped platform 355 is the same as the distance required for the rubber plug 331 to move out of the discharge hole 322.

[0050] Preferably, the opening width of the U-shaped groove 353 is consistent with the diameter of the distribution locus of the discharge holes 322, so as to prevent the paint from flowing out of the position outside the opening direction of the U-shaped groove 353 and save costs.

[0051] As Figure 2 , Figure 4 shown, the mounting plate 36 is provided at the other end of the guiding tube 31, and support plates 361 extending upward are respectively provided on both sides of the mounting plate 36. The upper part of the support plates 361 is connected to the drone. The second cylinder 37 is provided on the mounting plate 36. The output end of the second cylinder 37 extends into the guiding tube 31 and is connected to the vertical part of the moving seat 351.

[0052] Specific assembly process:

[0053] Insert the spring 24 into the limiting cylinder 23, and insert the paint bottle 25 with the opening facing downward along the axis of the spring 24 into the limiting cylinder 23. Vertically install the limiting cylinder 23 equipped with the spring 24 and the paint bottle 25 on the turntable 22. During installation, insert the connecting holes on the annular plate 231 vertically along the positioning pin 224.

[0054] On both sides of the central connection line between the through hole 211 and the material storage cylinder 21 as Figure 5 shown, symmetrically install the vertical plates 216 on the outside of the material storage cylinder 21. Then, move the material storage cylinder 21 vertically upward along the bottom of the turntable 22, and connect the upper ends of the vertical plates 216 to the drone 1, so as to fix the material storage cylinder 21 and make the cylindrical roller 215 abut against the bottom of the limiting cylinder 23, which not only improves the stability of the limiting cylinder 23, but also reduces the friction between the limiting cylinder 23 and the material storage cylinder 21.

[0055] Vertically rotate the pressing plate 223 downward along the axis of the rotating shaft 221, so that the pressing plate 223 presses the upper end of the paint bottle 25, so as to keep a certain pressure on the paint cylinder 25, thereby improving the stability of the paint bottle 25 in the limiting cylinder 23. It should be noted that: the distance between the outer wall of the pressing plate 223 and the inner wall of the convex edge 212 on the material storage cylinder 21 is greater than the outer dimension of the push plate 122, so that when the push plate 122 vertically pushes the paint bottle 25 downward, it can move vertically freely and avoid interference.

[0056] Insert the sealing plug 33 into the bottom of the guiding cylinder 32, and make the center of the sealing plug 33 rotatably connected to the center of the bottom of the guiding cylinder 32. Insert the rubber plug 331 into the corresponding discharge hole 322, and connect the two ends of the tension spring 34 to the first connecting pin and the second connecting pin respectively, and ensure that the second connecting pin is located in front of the first connecting pin. Vertically penetrate the upper end of the guiding pin 333 through the rotating pin, and the two ends of the rotating pin are respectively connected to both sides of the receiving groove 332, and the axis of the rotating pin is perpendicular to the axis of the second connecting pin. A sleeve 334 is rotatably provided on the outer wall of the guiding pin 333, so as to reduce the friction between the guiding pin 333 and the inclined groove 352.

[0057] An installation hole is opened in the middle of the top of the guiding tube 31, and the guiding cylinder 32 is vertically inserted into the top of the guiding tube 31 along the installation hole. The spike part 321 extends into the through hole 211 along the through hole 211, and the outer walls on both sides of the guiding tube 31 are connected to the lower ends of the vertical plates 261. The vertical part of the moving seat 351 is connected to the output end of the second cylinder 37, and the surface where the sponge pad 354 is located faces the outlet end of the guiding tube 31 and is inserted into the guiding tube 31, and the top surface of the support plate 361 is connected to the drone.

[0058] Specific usage process:

[0059] Start the drone 1 and start the flaw detection device, so that the flaw detection probe 11 detects the building wall. When a defect is detected, the flaw detection probe 11 returns the detected information to the control module and returns it to the remote control terminal through the communication unit to start the motor 222, so that the motor 222 drives the turntable 22 to rotate, as Figures 2-3 shown, rotate one of the limiting cylinders 23 to directly below the push plate 122, start the first cylinder 121, and push the push rod 12 vertically downward, so that the push plate 122 pushes the paint bottle 25 vertically downward, so that the lower end of the paint bottle 25 passes through the center of the annular plate 231 and extends into the through hole 211, so that the spike part 321 pierces the partition piece 251. The upper end of the spike part 321 is inclined, which not only easily pierces the partition piece 251, but also facilitates the paint to flow into the guiding cylinder 32.

[0060] Start the second cylinder 37, and make the second cylinder 37 slowly push the moving seat 351 to move along the length direction of the guiding tube 31. The guiding pin 333 moves along with the moving seat 351 under the action of the inclined groove 352, so that the sealing plug 33 rotates, so that the rubber plug 331 moves out of the corresponding discharge hole 322, so that the paint flows into the U-shaped groove 353 on the top surface of the moving seat 351. Then the paint flows into the sponge pad 354 along the opening of the U-shaped seat 352, and at this time the tension spring 34 is stretched.

[0061] In order to reduce the friction between the guiding pin 333 and the inclined groove 352, a sleeve 334 is sleeved outside the guiding pin 333, so that when the moving seat 351 moves, the sleeve 334 rotates in the inclined groove 352.

[0062] When the sleeve 334 moves out of the inclined groove 352, the sealing plug 33 resets under the action of the tension spring 34, so that the rubber plug 331 enters the corresponding discharge hole 322 again. The sponge pad 354 is pushed by the second cylinder 37 to move out to a predetermined length at the outlet end of the guiding tube 31 and marks the wall surface with defects, so as to facilitate the workers to process.

[0063] After the marking is completed, the second cylinder 37 enters the return stroke. Under the action of the strip-shaped table 355, the guide pin 333 is pushed into the receiving groove 332 to avoid the moving seat 351 when the moving seat 351 is reset. After the moving seat 351 is reset, the guide groove 333 automatically resets to a vertical state under the action of gravity.

[0064] Embodiment 2

[0065] A method for detecting flaws in a building wall, using the building wall flaw detection device described in Embodiment 1, includes the following steps:

[0066] S1. Insert the pigment bottles 25 into the corresponding limiting cylinders 23 in sequence, and insert the openings of the pigment bottles 25 vertically downward into the upper ends of the corresponding springs 24 in the limiting cylinders 23.

[0067] S2. Start the push rod 12 to move the push rod 12 vertically downward, thereby pushing the lower ends of the corresponding pigment bottles 25 through the springs 24 and into the through holes 211. The upper ends of the diversion cylinders 32 inserted into the through holes 211 obtain and temporarily store the pigment from the pigment bottles 25.

[0068] S3. Start the drone 1 and synchronously start the flaw detection probe 11 to detect the building wall. When a defect is found, the drone 1 hovers in place and starts the marking member 35 to move the marking member 35 along the length direction of the guide tube 31. When the front end of the marking member 35 moves to the lower end of the diversion cylinder 32, open the lower end of the diversion cylinder 32 and obtain the temporarily stored pigment to mark the defect.

[0069] The above are only the preferred embodiments of the present invention and do not represent the only or limit the present invention. Those skilled in the art should understand that without departing from the scope of the present invention, various changes or equivalent replacements made to the present invention all fall within the scope of protection of the present invention.

Claims

1. A building wall flaw detection device, comprising a drone (1) with a flaw detection probe (11) provided at its front end, characterized in that: The bottom of the drone (1) is provided with a push rod (12) for vertical extension, and the device further comprises: The material storage part (2) comprises a material storage barrel (21) arranged at the bottom of the drone (1), wherein a through hole (211) corresponding to the push rod (12) is provided at the bottom of the material storage barrel (21), a turntable (22) is coaxially rotatable inside the material storage barrel (21), and a limiting barrel (23) is arranged on the material storage barrel in a circular array, wherein the center of gravity of the limiting barrel (23) is located outside the turntable (22), and the distance between the center of the limiting barrel (23) and the center of the turntable (22) is consistent with the distance between the center of the through hole (211) and the center of the bottom of the material storage barrel (21), and a spring (24) is provided on the inner bottom surface of the limiting barrel (23), and a paint bottle (25) with its opening facing downward is vertically inserted at the upper end thereof, and a baffle (251) is provided at the opening of the paint bottle (25), and the size of the baffle (251) is smaller than the size of the through hole (211); The marking part (3) comprises a guide tube (31) horizontally arranged below the material storage tube (21), a guide tube (32) vertically arranged on the guide tube (31), a spike portion (321) is arranged at the upper opening of the guide tube (32) and is inserted into the through hole (211), the upper end of the spike portion (321) is arranged obliquely, the lower end of the guide tube (32) extends into the guide tube (31), the bottom of the guide tube (32) is provided with discharge holes (322) in a circumferential array, and the guide tube ( A sealing plug (33) is rotatably provided at the center of the bottom of the sealing plug (32), a rubber plug (331) corresponding to each of the discharge holes (322) is provided on the top surface of the sealing plug (33), a tension spring (34) is provided on one side of the sealing plug (33) and one side of the bottom of the guide tube (32), a receiving groove (332) is provided on the bottom surface of the sealing plug (33), the receiving groove (332) is provided with a guide pin (333), the upper end of the guide pin (333) is rotatably connected to the receiving groove (332), and a mark is provided. The component (35) comprises a movable seat (351) of an inverted L-shaped structure. The top surface of the horizontal portion of the movable seat (351) is provided with an inclined groove (352) for pushing the lower end of the guide pin (333) to open the discharge hole (322). A U-shaped groove (353) is provided on one side of the inclined groove (352). The rear end of the inclined groove (352) faces the U-shaped groove (353). The opening of the U-shaped groove (353) faces the outlet end of the guide tube (31). A sponge pad (354) is provided at the right angle for absorbing the paint in the U-shaped groove (353). A strip platform (355) is provided on one side of the U-shaped groove (353). One side of the strip platform (355) is flush with the opening of the U-shaped groove (353). The front end of the inclined groove (352) is connected to one side of the strip platform (355). The rear end of the inclined groove (352) is connected to the other side of the strip platform (355). The rear end of the inclined groove (352) is inclined toward the U-shaped groove (353).

2. The building wall flaw detection device according to claim 1, characterized in that: The upper end of the push rod (12) is connected to the movable end of a first cylinder (121) vertically arranged inside the UAV (1), the lower end of the push rod (12) is provided with a push plate (122), the outer dimensions of the push plate (122) are smaller than the inner diameter of the limiting cylinder (23), the upper end of the material storage cylinder (21) is provided with a convex edge (212) extending toward the inside thereof, the center of the rotating disk (22) is connected to a rotating shaft (221), the upper end of the rotating shaft (221) is provided with a motor (222), the motor (222) is arranged in the UAV (1), the upper spiral sleeve of the rotating shaft (221) is provided with a pressing plate (223), the distance between the pressing plate (223) and the convex edge (212) is larger than the outer diameter of the push plate (122).

3. The building wall flaw detection device according to claim 1, characterized in that: An annular seat (213) is provided inside the bottom surface of the storage barrel (21), the through hole (211) is located on the inner side of the annular seat (213), an annular groove (214) is provided in the top recess of the annular seat (213), a cylindrical roller (215) is provided in the annular groove (214), and the cylindrical roller (215) is in rolling contact with the bottom of the limiting barrel (23).

4. The building wall flaw detection device according to claim 1, characterized in that: Positioning pins (224) are arranged in a circular array on the rotating disk (22), an annular plate (231) is arranged at the bottom of the limiting cylinder (23), a connecting hole is arranged on the annular plate (231), the connecting hole is matched with the positioning pins (224), and the lower end of the spring (24) is arranged on the annular plate (231).

5. The building wall flaw detection device according to claim 4, characterized in that: The spring (24) is a cylindrical structure, and the inner wall size of the spring (24) is larger than the inner diameter of the annular plate (231).

6. The building wall flaw detection device according to claim 1, characterized in that: The outer wall of the guide pin (333) is sleeved with a sleeve (334), and the width of the inclined groove (352) matches the outer diameter of the sleeve (334).

7. The building wall flaw detection device according to claim 1, characterized in that: A mounting plate (36) is provided at the other end of the guide tube (31), a second cylinder (37) is provided on the mounting plate (36), an output end of the second cylinder (37) is connected to the outer side of the vertical portion of the movable seat (351), support plates (361) are vertically provided on both sides of the mounting plate (36), and the upper ends of the support plates (361) are connected to the drone (1).

8. A method for flaw detection of a building wall, using the building wall flaw detection device as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1, sequentially inserting the paint bottles (25) into the corresponding limiting cylinders (23), and inserting the openings of the paint bottles (25) downward into the upper ends of the springs (24) corresponding to the limiting cylinders (23); S2, starting the push rod (12) to move the push rod (12) vertically downward, so that the upper end of the guide tube (32) is inserted into the through hole (211), and the pigment is obtained from the pigment bottle (25) and temporarily stored; S3, starting the drone (1) and simultaneously starting the flaw detection probe (11) to detect and inspect the building wall. When a defect is found, the drone (1) flies in situ and starts the marking member (35) to move along the guide tube (31) to open the lower end of the guide tube (32) and obtain the temporarily stored pigment to mark the defect.

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