A device for measuring the carbonation depth of concrete

Abstract

This invention relates to the field of concrete carbonation depth detection technology, specifically a concrete carbonation depth measuring device, including a measuring instrument and a measuring probe mounted on the measuring instrument. An elastic telescopic ring plate is provided on one side of the measuring instrument, a driving component is provided on the side of the measuring instrument near the elastic telescopic ring plate, and a cleaning component is provided on the side of the measuring instrument near the elastic telescopic ring plate. This invention can clean larger particles. Simultaneously, a flexible brush rotates under the drive of an inner rotating rod, causing the flexible brush to continuously contact and clean the inner wall of the hole, removing some large particles. At the same time, the rotation of the entire inner rotating rod causes air recirculation inside the hole under the action of the air supply hood and the suction fan blades. This recirculation continuously pushes some escaped airborne dust away from the hole, preventing the dust from falling back into the hole and affecting the subsequent measurement results.

Description

Technical Field

[0001] This invention relates to the field of concrete carbonation depth detection technology, specifically to a concrete carbonation depth measuring device. Background Technology

[0002] Concrete carbonation refers to the process by which calcium hydroxide in concrete reacts with carbon dioxide in the air or dissolved carbon dioxide in water, or other acidic substances, to form calcium carbonate and lose its alkalinity. Measuring the depth of concrete carbonation is an important means of assessing the durability of concrete structures.

[0003] Before taking measurements, the holes are struck with a hammer and chisel. When a suitable hole is drilled, the dust and impurities remaining inside the hole are cleaned out with an air nozzle. After cleaning these impurities, phenolphthalein solution is dripped into the hole to induce a color change reaction. Finally, the carbonation depth of the entire concrete wall is determined by measuring instrument.

[0004] Cleaning the drilled holes during measurements is necessary to prevent residual dust from adhering to the inner walls and affecting the color change of phenolphthalein solution when it is added. Current cleaning methods involve inserting an air nozzle into the hole and blowing the dust out. However, this method only removes fine dust particles that have fallen into the hole; larger particles cannot be effectively removed, affecting subsequent measurement results. Furthermore, the air nozzle method easily disperses fine dust into the surrounding air. When users approach the wall for thorough cleaning, this dispersed dust can easily enter their eyes, causing discomfort. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a concrete carbonation depth measuring device that can clean larger particles while simultaneously treating airborne dust during the cleaning process to prevent it from affecting the user.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a concrete carbonation depth measuring device, comprising a measuring instrument and a measuring stylus disposed on the measuring instrument, wherein an elastic telescopic ring plate is disposed on one side of the measuring instrument, a driving component is disposed on the side of the measuring instrument near the elastic telescopic ring plate, and a cleaning component is disposed on the side of the measuring instrument near the elastic telescopic ring plate, and the cleaning component is located inside the elastic telescopic ring plate.

[0007] The cleaning assembly includes an inner rotating rod disposed on the side of the measuring instrument near the elastic telescopic ring plate, an outer rotating rod sleeved on the inner rotating rod, and the outer rotating rod and the inner rotating rod engaging and sliding with each other, an annular sleeve disposed on the outer rotating rod, telescopic sleeve plates arranged in an array on the annular sleeve, and flexible brushes arranged in an array on the side of the telescopic sleeve plates away from the inner rotating rod;

[0008] The cleaning assembly also includes an air supply assembly, which is used to achieve air recirculation in the area to be cleaned by the rotation of the inner rotating rod, and to capture some fine dust particles that have escaped into the air.

[0009] Preferably, the air supply assembly includes a suction fan blade disposed on the inner rotating rod, an air supply hood sleeved on the suction fan blade, and the air supply hood is fixedly connected to the elastic telescopic ring plate. An adsorption plate is disposed on the inner rotating rod and is located between the suction fan blade and the outer rotating rod. A friction plate is disposed on the air supply hood and is in contact with the adsorption plate.

[0010] Preferably, the air supply hood has an air inlet near the fan blades, the air supply hood has an array of air supply holes at the end away from the inner rotating rod, and the adsorption plate has a row of oblique holes.

[0011] Preferably, the adsorption plate is made of polypropylene, and the friction plate has cellulose acetate material embedded on the side near the adsorption plate, and the material is in contact and bonded to the adsorption plate.

[0012] Preferably, the telescopic sleeve is provided with a second spring inside, and there are two second springs, which are respectively in contact with two adjacent inner sleeves. A circular ball is provided at the end of the telescopic sleeve away from the annular sleeve.

[0013] Preferably, the drive assembly includes a mounting base disposed on one side of the measuring instrument, a swing handle movably disposed on the mounting base, a transmission rod disposed on the side of the swing handle near the elastic telescopic ring plate, a movable sleeve disposed on the end of the transmission rod away from the swing handle, a belt disposed on the movable sleeve, a transmission shaft sleeved on the end of the belt away from the transmission rod, and the diameter of the transmission shaft is different from that of the movable sleeve, a transmission gear disposed on the transmission shaft, and a mating gear disposed on the inner rotating rod, and the mating gear meshes with the transmission gear.

[0014] Preferably, the measuring instrument is provided with a protective shell on the side near the inner rotating rod, and the protective shell is rotatably connected to the transmission shaft and the inner rotating rod. A one-way ratchet is movably provided on the protective shell near the transmission rod, and the one-way ratchet is fixedly connected to the movable sleeve. An array of pressing spring blocks is provided on the transmission rod, and one end of the pressing spring block is in contact with the one-way ratchet.

[0015] Preferably, a sliding groove is provided on one side of the swing handle, and a sliding block is movably disposed inside the sliding groove. A telescopic rod is provided on the side of the measuring instrument near the swing handle, and the telescopic rod is rotatably connected to the sliding block. A first spring is sleeved on the outside of the telescopic rod.

[0016] Preferably, the inner rotating rod has a placement groove at one end near the outer rotating rod, and a limit plate is movably installed inside the placement groove. A telescopic limit rod is installed inside the placement groove, and a third spring is sleeved on the outside of the telescopic limit rod.

[0017] Preferably, a limiting groove is formed inside the outer rotating rod, and the limiting groove is in contact with the limiting plate, and a push plate is movably disposed on the outer rotating rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention uses a flexible brush that rotates under the drive of an inner rotating rod to continuously clean the inner wall of the hole, removing large particles. At the same time, the rotation of the inner rotating rod creates airflow inside the hole under the action of the air supply hood and the suction fan blades. This airflow pushes some of the escaping air dust away from the hole, preventing the dust from falling back into the hole and affecting the subsequent measurement results.

[0020] 2. At the same time, as these dust particles continuously approach the adsorption plate, the angled holes on the adsorption plate can effectively block these dust particles, allowing them to directly contact the adsorption plate. Meanwhile, as the rotating adsorption plate continuously rubs against the friction plate, static electricity will appear on the adsorption plate, causing the dust particles that come into contact with the adsorption plate to be directly adsorbed onto it, continuously reducing the dust particles escaping from the holes, and making the final measurement results more accurate.

[0021] 3. The rotation of the entire inner rotating rod is driven by the cooperation between the transmission gear and the mating gear. The maximum diameter of the transmission gear is much larger than that of the mating gear, so that the rotation speed of the mating gear is faster than that of the transmission gear during the entire rotation process. This not only saves effort for the user, but also allows the entire suction fan blade to transport air at a faster speed, increasing the air return flow rate inside the hole and quickly processing the scattered dust, preventing the dust from falling back into the hole. Attached Figure Description

[0022] Figure 1 This is a frontal view of the entire device of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall rear structure of the device of the present invention.

[0024] Figure 3This is a side cross-sectional view of the cleaning component and the air supply component of the device of the present invention.

[0025] Figure 4 This is an enlarged schematic diagram of a portion of the cleaning component of the device of the present invention.

[0026] Figure 5 This is a half-sectional schematic diagram of the connection structure between the inner rotating rod and the outer rotating rod in the device of the present invention.

[0027] Figure 6 This is a schematic diagram of the exploded structure of the suction component of the device of the present invention.

[0028] Figure 7 This is a schematic diagram of the internal structure of the drive component of the device of the present invention.

[0029] Figure 8 This is a partial schematic diagram of the connection structure between the measuring instrument and the swing handle of the device of the present invention.

[0030] Figure 9 The device of the present invention Figure 7 A magnified view of a portion of point A in the middle.

[0031] Figure 10 This is a schematic diagram of the connection structure between the rotating rod and the internal limiting plate in the device of the present invention.

[0032] Figure 11 This is a half-sectional schematic diagram of the connection structure between the outer rotating rod and the propulsion plate of the device of the present invention.

[0033] In the diagram: 1. Measuring instrument; 11. Protective housing; 12. One-way ratchet; 13. Telescopic rod; 2. Measuring stylus; 3. Elastic telescopic ring plate; 4. Drive assembly; 41. Mounting base; 42. Swing handle; 421. Clamping spring; 422. Sliding groove; 423. Sliding block; 424. First spring; 43. Transmission rod; 44. Movable sleeve; 45. Belt; 46. Transmission shaft; 47. Transmission gear; 48. Matching gear; 5. Cleaning assembly; 51. Internal rotation. 511. Rod; 512. Placement slot; 513. Limiting plate; 514. Telescopic limit rod; 515. Third spring; 52. Outer rotating rod; 521. Limiting slot; 522. Push plate; 53. Annular sleeve; 54. Telescopic sleeve plate; 541. Second spring; 542. Circular ball bearing; 55. Flexible brush; 6. Air supply assembly; 61. Suction fan blade; 62. Air supply cover; 621. Air inlet; 622. Air supply hole; 63. Adsorption plate; 631. Angled hole; 64. Friction plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0035] Please see Figures 1 to 6 This is the first embodiment of the present invention, which provides a technical solution: a concrete carbonation depth measuring device, including a measuring instrument 1 and a measuring stylus 2 disposed on the measuring instrument 1. The measuring stylus 2 is used to contact the boundary line between the carbonated and uncarbonated layers in the area to be detected to obtain the final monitoring data. An elastic telescopic ring plate 3 is disposed on one side of the measuring instrument 1. The elastic telescopic ring plate 3 is used to seal the drilled hole in an annular shape, so that when the dust in the hole is cleaned, the dust that escapes in the air will be intercepted. A driving component 4 is disposed on the side of the measuring instrument 1 near the elastic telescopic ring plate 3. The driving component 4 is used to transmit power so that the inner rotating rod 51 can rotate. A cleaning component 5 is disposed on the side of the measuring instrument 1 near the elastic telescopic ring plate 3. The cleaning component 5 is used to clean the dust adsorbed in the hole when rotating, and the cleaning component 5 is located inside the elastic telescopic ring plate 3.

[0036] The cleaning component 5 includes an inner rotating rod 51 disposed on the side of the measuring instrument 1 near the elastic telescopic ring plate 3. The inner rotating rod 51 has an annular array of slots that create a sliding engagement relationship between the outer rotating rods 52 and the inner rotating rod 52. This allows the outer rotating rods 52 to rotate synchronously when the inner rotating rod 51 rotates. The outer rotating rod 52 is sleeved on the inner rotating rod 51, and the outer rotating rod 52 and the inner rotating rod 51 are engaged and slide together. The end of the outer rotating rod 52 away from the inner rotating rod 51 is dome-shaped, and this dome has a through hole penetrating the interior of the outer rotating rod 52. This hole is used to collect any contents stored inside the outer rotating rod 52 when the outer rotating rod 52 is compressed and retracts towards the measuring instrument 1. Air can be expelled through the through hole to prevent air inside the outer rotating rod 52 from affecting the overall retraction state of the outer rotating rod 52 if it cannot be expelled. The outer rotating rod 52 is provided with an annular sleeve 53, and telescopic sleeve plates 54 are arranged in an array on the annular sleeve 53. The telescopic sleeve plates 54 are multiple sleeve plates spliced ​​together, and springs are placed between each pair of adjacent sleeve plates to allow the telescopic sleeve plates 54 to return to their original position without external force. Flexible brushes 55 are arranged in an array on the side of the telescopic sleeve plates 54 away from the inner rotating rod 51. The flexible brushes 55 are preferably made of nylon or polyester material, both of which have good elasticity and wear resistance.

[0037] The cleaning component 5 also includes an air supply component 6, which is used to achieve air recirculation in the area to be cleaned by the rotation of the inner rotating rod 51, and to capture some fine dust that has escaped into the air.

[0038] The air supply assembly 6 includes a suction fan blade 61 mounted on the inner rotating rod 51. The suction fan blade 61 is fixedly connected to the inner rotating rod 51, and there is sufficient gap between the baffle on the side of the suction fan blade 61 near the outer rotating rod 52 and the inner rotating rod 51, allowing outside air to enter the suction fan blade 61 through this gap. Driven by the fan blades arranged in an array with a certain tilt angle inside the suction fan blade 61, air is continuously supplied into the air supply hood 62. The air is then sent back into the cleaning area through the air supply holes 622 arrayed on the air supply hood 62, thereby realizing gas recirculation within the cleaning area. Under the action of this gas recirculation, dust that has escaped from the air during the cleaning process is carried and brought into contact with the adsorption plate 63. The suction fan blade 61 is fitted with the air supply hood 62, and the air supply hood 62 is fixedly connected to the elastic telescopic ring plate 3. The air supply hood 62 is funnel-shaped, and the interior of the air supply hood 62 is hollow. The shroud 62 has an air inlet 621 at the suction fan blade 61. When air is carried by two adjacent fan blades in the suction fan 61 to the air inlet 621, this air is sent into the air supply shroud 62 and finally returns to the space in the cleaning area through the air supply hole 622 on the air supply shroud 62. An adsorption plate 63 is provided on the inner rotating rod 51 and is located between the suction fan blade 61 and the outer rotating rod 52. The adsorption plate 63 is used to rotate synchronously under the drive of the inner rotating rod 51. During the rotation, the adsorption plate 63 continuously rubs against the friction plate 64, causing the adsorption plate 63 to generate static electricity and adsorb the dust that comes into contact with it. The air supply shroud 62 is provided with a friction plate 64 and is in contact with the adsorption plate 63. The side of the friction plate 64 that contacts the adsorption plate 63 is filled with acetate fiber fabric, so that the adsorption plate 63 itself generates static electricity under the action of friction.

[0039] An air inlet 621 is provided near the fan blade 61 of the air supply hood 62. Air outlet 622 are arranged in an array at the end of the air supply hood 62 away from the inner rotating rod 51. The air outlet 622 on the curved surface of the air supply hood 62 have a certain angle of inclination. Under the action of this angle, when a portion of air is supplied, it can form a certain angle with the cleaning area, allowing dust dispersed in the air to be moved towards the adsorption plate 63 by this portion of air. The adsorption plate 63 has a row of oblique holes 631. The overall tilt angle of the inclined hole 631, when viewed from a horizontal position, is in a state of blocking particulate matter. When the internal air carrying dust approaches the adsorption plate 63, the air will enter the fan blade 61 through the inclined hole 631, while the dust will be blocked by the inclined hole 631 and come into contact with the entire adsorption plate 63. During the contact process, the adsorption plate 63, which has an electrostatic effect, will adsorb the dust that has escaped from the air, thus preventing the dust from falling back into the hole and affecting the final measurement result.

[0040] The adsorption plate 63 is made of polypropylene. The friction plate 64 has cellulose acetate material embedded on the side close to the adsorption plate 63, and this material is in contact with the adsorption plate 63. When the adsorption plate 63 rotates with the inner rotating rod 51, the adsorption plate 63 will continuously rub against the cellulose acetate material embedded in the friction plate 64. Under the action of friction, electrons inside both will be transferred, eventually making the adsorption plate 63 positively charged and having an adsorption effect, thus adsorbing the dust in contact. The cellulose acetate material on the friction plate 64 is negatively charged.

[0041] The telescopic sleeve 54 is equipped with two second springs 541, which contact each other with adjacent inner sleeves. The second springs 541 are used to reset the sleeves inside the telescopic sleeve 54. At the same time, the second springs 541 are sleeved on a top rod, which restricts several sleeves to prevent them from falling off. A circular ball bearing 542 is provided at the end of the telescopic sleeve 54 away from the annular sleeve 53. When the telescopic sleeve 54 is compressed and contracted, the circular ball bearing 542 can contact the inner wall of the air supply hood 62 before the telescopic sleeve 54, thereby reducing friction.

[0042] During use, firstly, the elastic telescopic ring plate 3 on the measuring instrument 1 is placed close to the concrete wall, and the drilled hole is completely covered inside the elastic telescopic ring plate 3. Then, the measuring instrument 1 is continuously moved closer to the wall until it encounters resistance during movement, at which point it stops. Then, the inner rotating rod 51 is rotated by the drive assembly 4. During the rotation of the inner rotating rod 51, the suction fan blade 61 and the outer rotating rod 52 are simultaneously rotated. This allows the flexible brush 55 on the outer rotating rod 52 to brush away the dust and impurities remaining in the hole, removing them from the hole. At the same time, the rotation of the suction fan blade 61 can draw air from the hole. During the suction process, some dust particles scattered in the air are carried closer to the adsorption plate 63, and the drawn air passes through the air supply hood 62. The air enters the air supply hood 62 through the air inlet 621. At the same time, this air eventually re-enters the hole through the air supply hood 622, forming an air recirculation. Under the action of air recirculation, the dust in the hole will be continuously moved to the surface of the hole. During this process, the adsorption plate 63 continuously contacts the friction plate 64, causing the adsorption plate 63 to generate an electrostatic phenomenon, adsorbing the dust that comes into contact with the adsorption plate 63, preventing the dust from re-entering the hole through the air supply hood 62 and affecting the subsequent measurement results. After a period of time, the measuring instrument 1 can be removed, and phenolphthalein solution can be dripped into the hole. After waiting for a period of time, the measuring probe 2 on the measuring instrument 1 is brought into contact with the boundary between the carbonized and uncarbonized layers in the hole to obtain the final measurement data. Example

[0043] Please see Figures 1 to 9 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0044] Drive assembly 4 includes a mounting base 41 disposed on one side of the measuring instrument 1. A swing handle 42 is movably mounted on the mounting base 41. By placing the user's thumb into the circular opening of the swing handle 42 and pressing it inward, the swing handle 42 can swing around the mounting base 41. Simultaneously, a transmission rod 43 located at the axis of the swing handle 42 will rotate, thereby transmitting power through the transmission rod 43. The transmission rod 43 is disposed on the side of the swing handle 42 near the elastic telescopic ring plate 3. A movable sleeve 44 is disposed on the end of the transmission rod 43 away from the swing handle 42. A belt 45 is disposed on the movable sleeve 44. The belt 45 is disposed on the side away from the transmission rod 43. A drive shaft 46 is fitted at the end, and the diameter of the drive shaft 46 is different from that of the movable sleeve 44. The movable sleeve 44 transmits the rotational power generated to the drive shaft 46 through the belt 45. At the same time, the maximum diameters of the drive shaft 46 and the movable sleeve 44 are different, so that the belt 45 will not slip during the entire conveying process. A drive gear 47 is provided on the drive shaft 46, and a mating gear 48 is provided on the inner rotating rod 51. The mating gear 48 meshes with the drive gear 47. The maximum diameter of the drive gear 47 is much larger than that of the mating gear 48, so that the rotational speed of the mating gear 48 is faster than that of the drive gear 47 during the entire rotation process, and the overall rotational speed of the inner rotating rod 51 is much greater than that of the drive rod 43.

[0045] A protective shell 11 is provided on the side of the measuring instrument 1 near the inner rotating rod 51, and the protective shell 11 is rotatably connected to the transmission shaft 46 and the inner rotating rod 51. A one-way ratchet 12 is movably provided on the protective shell 11 near the transmission rod 43, and the one-way ratchet 12 is fixedly connected to the movable sleeve 44. The one-way ratchet 12 is used to contact the abutting spring block 421 provided on the swing handle 42. During the entire contact process, when the swing handle 42 is no longer pressed, the first spring 424 will reset the swing handle 42. When the handle 2 is reset, it will no longer be able to transmit power to the one-way ratchet 12, so that the one-way ratchet 12 will stop driving the movable sleeve 44 to rotate. The transmission rod 43 is provided with an array of abutting blocks 421, and one end of the abutting blocks 421 is in contact with the one-way ratchet 12. The abutting blocks 421 have a certain curvature, so that when the swing handle 42 is reset, the transmission rod 43 will drive the abutting blocks 421 to rotate in the opposite direction. At this time, the abutting blocks 421 will no longer push the one-way ratchet 12.

[0046] A sliding groove 422 is provided on one side of the swing handle 42, and a sliding block 423 is movably arranged inside the sliding groove 422. A telescopic rod 13 is provided on the side of the measuring instrument 1 near the swing handle 42, and the telescopic rod 13 is rotatably connected to the sliding block 423. A first spring 424 is sleeved on the outside of the telescopic rod 13. The first spring 424 is used to drive the swing handle 42 to reset through elastic force. When the swing handle 42 is pressed and rotated, the telescopic rod 13 and the first spring 424 retract synchronously, so that the swing handle 42 can be reset to the initial position without the action of external force.

[0047] During use, when the user presses the swing handle 42 to make the transmission rod 43 rotate synchronously, the clamping spring block 421 on the transmission rod 43 will push the one-way ratchet 12 to rotate, so that the belt 45 transmits power to the transmission shaft 46, causing the transmission gear 47 to rotate. The meshing action between the transmission gear 47 and the mating gear 48 on the inner rotating rod 51 drives the inner rotating rod 51 to rotate. When the user presses the swing handle 42 to the limit position and stops pressing, the swing handle 42 can be reset under the action of the first spring 424. During the reset process of the swing handle 42, the reverse rotation of the transmission rod 43 prevents the clamping spring block 421 from pushing the one-way ratchet 12 to rotate, thereby avoiding the inner rotating rod 51 from rotating in the opposite direction and affecting the entire cleaning process.

[0048] The remaining structure is the same as that in Example 1. Example

[0049] Please see Figures 1 to 11 This is the third embodiment of the present invention, which differs from the first and second embodiments in that:

[0050] The inner rotating rod 51 has a placement groove 511 at one end near the outer rotating rod 52, and a limiting plate 512 is movably installed inside the placement groove 511. The limiting plate 512 consists of an inclined straight plate and a locking block with an arc surface, so that when the outer rotating rod 52 moves, the limiting plate 512 can lock the current position, preventing the outer rotating rod 52 from sliding randomly and affecting the cleaning effect of the flexible brush 55 on the outer rotating rod 52 on the cleaning area. A telescopic limiting rod 513 is installed inside the placement groove 511, and a third spring 514 is sleeved on the outside of the telescopic limiting rod 513.

[0051] The outer rotating rod 52 has a limiting groove 521 inside, and the limiting groove 521 is in contact with the limiting plate 512. The limiting groove 521 is in the shape of an oblique tooth, which is used to limit the limiting plate 512 to the outer rotating rod 52, and at the same time, the outer rotating rod 52 can only move in one direction. A push plate 522 is movably arranged on the outer rotating rod 52. The push plate 522 is used to unlock the locking action between the limiting plate 512 and the limiting groove 521 by sliding, so that the outer rotating rod 52 can move in the opposite direction to return to the initial position.

[0052] Throughout the entire process, as the measuring instrument 1 approaches the concrete wall, the outer rotating rod 52 continuously retracts the inner rotating rod 51. During this movement, the limiting groove 521 on the outer rotating rod 52 continuously contacts the limiting plate 512 on the inner rotating rod 51, creating a locking relationship between the limiting plate 512 and the limiting groove 521. This prevents the outer rotating rod 52 from sliding freely. When the measurement is complete, pushing the push plate 522 causes the limiting plate 512 to rotate, temporarily disengaging the limiting plate 512 from the limiting groove 521. This allows the user to reset the outer rotating rod 52 for continued use.

[0053] The remaining structures are the same as those in Examples 1 and 2.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete carbonation depth measuring device comprising a measuring instrument (1) and a measuring stylus (2) arranged on the measuring instrument (1), characterized in that: The measuring instrument (1) is provided with an elastic expansion ring plate (3) on one side, a driving assembly (4) is arranged on the side of the measuring instrument (1) close to the elastic expansion ring plate (3), and a cleaning assembly (5) is arranged on the side of the measuring instrument (1) close to the elastic expansion ring plate (3) and located inside the elastic expansion ring plate (3); The cleaning assembly (5) comprises an inner rotating rod (51) arranged on the side of the measuring instrument (1) close to the elastic expansion ring plate (3), an outer rotating rod (52) is sleeved on the inner rotating rod (51) and is in clamping sliding connection with the inner rotating rod (51), an annular sleeve (53) is arranged on the outer rotating rod (52), and a plurality of expansion sleeve plates (54) are arranged in an array on the side of the annular sleeve (53) away from the inner rotating rod (51); and a plurality of flexible brushes (55) are arranged in an array on the side of the expansion sleeve plate (54) away from the inner rotating rod (51). The cleaning assembly (5) further comprises a air supply assembly (6) for realizing air backflow in a region to be cleaned under the rotation of the inner rotating rod (51) and capturing fine dust dispersed in the air. The air supply assembly (6) comprises suction fan blades (61) arranged on the inner rotating rod (51), a air supply cover (62) is sleeved on the suction fan blades (61) and is fixedly connected with the elastic expansion ring plate (3), an adsorption plate (63) is arranged on the inner rotating rod (51) and located between the suction fan blades (61) and the outer rotating rod (52), and a friction plate (64) is arranged on the air supply cover (62) and in contact with the adsorption plate (63). An air inlet hole (621) is formed on the side of the air supply cover (62) close to the suction fan blades (61), a plurality of air supply holes (622) are formed in an array on the end of the air supply cover (62) away from the inner rotating rod (51), and a plurality of inclined holes (631) are formed in a row on the adsorption plate (63). Second springs (541) are arranged in the expansion sleeve plate (54) and in contact with every two adjacent inner sleeve plates, and a circular ball (542) is arranged on the end of the expansion sleeve plate (54) away from the annular sleeve (53). The driving assembly (4) comprises a mounting seat (41) arranged on one side of the measuring instrument (1), an oscillating handle (42) is movably arranged on the mounting seat (41), a transmission rod (43) is arranged on the side of the oscillating handle (42) close to the elastic expansion ring plate (3), an active sleeve (44) is arranged on the end of the transmission rod (43) away from the oscillating handle (42), a belt (45) is arranged on the active sleeve (44), a transmission shaft (46) is sleeved on the end of the belt (45) away from the transmission rod (43) and has a different diameter from the active sleeve (44), a transmission gear (47) is arranged on the transmission shaft (46), and a matching gear (48) is arranged on the inner rotating rod (51) and in meshing connection with the transmission gear (47).

2. A device for measuring the carbonation depth of concrete according to claim 1, characterized in that: The adsorption plate (63) is made of polypropylene, the friction plate (64) is embedded with acetate material on the side close to the adsorption plate (63), and the material is in contact with the adsorption plate (63).

3. A device for measuring carbonation depth of concrete according to claim 1, characterized in that: The measuring instrument (1) is provided with a protective shell (11) on the side close to the inner rotating rod (51), and the protective shell (11) is rotatably connected with the transmission shaft (46) and the inner rotating rod (51), the protective shell (11) is movably provided with a one-way ratchet (12) near the transmission rod (43), and the one-way ratchet (12) is fixedly connected with the movable sleeve (44), and the transmission rod (43) is arrayed with abutting elastic blocks (421), and one end of the abutting elastic blocks (421) is in contact with the one-way ratchet (12).

4. A device for measuring the carbonation depth of concrete according to claim 3, characterized in that: The swing handle (42) is provided with a sliding groove (422) on one side, the sliding groove (422) is movably provided with a sliding block (423) inside, the measuring instrument (1) is provided with an extension rod (13) on the side close to the swing handle (42), and the extension rod (13) is rotatably connected with the sliding block (423), and the extension rod (13) is externally provided with a first spring (424).

5. A device for measuring carbonation depth of concrete according to claim 3, characterized in that: The inner rotating rod (51) is provided with a placing groove (511) on one end close to the outer rotating rod (52), and the placing groove (511) is movably provided with a limiting plate (512) inside, and the placing groove (511) is provided with a telescopic limiting rod (513) inside, and the telescopic limiting rod (513) is externally provided with a third spring (514).

6. A concrete carbonation depth measuring device according to claim 5, characterised in that: The outer rotating rod (52) is internally provided with a limiting groove (521), and the limiting groove (521) is in contact with the limiting plate (512), and the outer rotating rod (52) is movably provided with a pushing plate (522).

Images