Auxiliary device for detecting thickness of reinforcing steel bar protective layer

Abstract

The invention discloses an auxiliary device for detecting the thickness of a steel bar protective layer, and relates to the technical field of steel bar protective layer thickness detection, the auxiliary device comprises a thickness detector, a guide structure, an adjustable clamping mechanism and an auxiliary assembly, the auxiliary assembly is connected between the adjustable clamping mechanism and the guide structure, and the thickness detector is used for detecting the thickness of the steel bar protective layer. The adjustable clamping mechanism is contracted and clamped on the side wall of the beam body to limit the position of the guide structure, through the design of a portal frame system and a side guide structure of the adjustable clamping mechanism, the space limitation of traditional detection equipment is broken through, and double improvement of longitudinal height compression and transverse stability is achieved; the space attitude is automatically calibrated through a double-stand-column-cross-beam system of the adjustable clamping mechanism, so that the motion trail of the thickness detector is strictly perpendicular to the trend of the reinforcing steel bar all the time, and the trail offset error caused by manual operation is eliminated. In addition, the inclination angle is automatically compensated through a dynamic balance mechanism of the alignment assembly, so that the thickness detector can still be accurately attached to the surface in complex areas such as a beam-wall junction.

Description

Technical Field

[0001] This application relates to the technical field of steel bar cover thickness detection, in particular to an auxiliary device for steel bar cover thickness detection. Background Art

[0002] The detection of the steel bar cover thickness is an important link in the quality control of building projects, and its main purpose is to ensure the safety and stability of building structures. The steel bar cover refers to the distance from the outer edge of the steel bar to the surface of the component in a concrete component, and its main function is to protect the steel bar from corrosion, thereby improving the durability and load-bearing capacity of the structure.

[0003] Chinese Patent Application with Publication No. CN110645938A discloses an auxiliary device for detecting the steel bar cover thickness in traffic engineering, including a portable box body, a PLC controller, a distance sensor one, and a distance sensor two. A cover body is connected to the upper part of the portable box body through a hinge, and a lock is arranged between the cover body and the portable box body. The PLC controller is connected below the lock by screws. The steel bar detector is controlled by a handle to slide arbitrarily along the X-direction slide rail and the Y-direction slide rail, realizing the arbitrary movement of the steel bar detector in a plane parallel to the steel bar cover. The operation is simple, and the direct contact between the steel bar detector and the steel bar cover is avoided, which can extend the service life of the steel bar detector.

[0004] In traditional steel bar cover thickness detection operations, the detector usually relies on the bottom rollers to contact the beam surface to maintain balance. When the detector moves in the middle of a flat beam surface, all four rollers contact the concrete surface at the same time. The instrument controls the movement trajectory through the built-in infrared guidance system. At this time, the stable contact of the two sets of symmetric rollers can ensure that the probe axis is parallel to the steel bar direction, so as to achieve accurate measurement of the cover thickness. However, when the detection path extends to the edge area of the beam body, only one set of rollers of the detector can contact the effective working surface, and the rest of the rollers are suspended, resulting in the overall loss of balance of the instrument. At this time, the probe axis is prone to tilt and shift, and significant deviations occur in the detection data.

[0005] Therefore, this application proposes an auxiliary device for steel bar cover thickness detection to solve the above problems.

[0006] Application Content

[0007] In view of the problems existing in the above-mentioned prior art, this application is proposed.

[0008] To solve the above technical problems, this application provides the following technical solution: an auxiliary device for steel bar cover thickness detection, including: a thickness detector that can move along the surface of the beam body, and the thickness detector is configured with an electromagnetic induction probe, a housing, and a roller assembly;

[0009] An adjustable clamping mechanism straddling both sides of the beam body. The adjustable clamping mechanism realizes the adjustment of the clamping distance through a bidirectional sliding compensation mechanism and is provided with an elastic buffer layer in contact with the side wall of the beam body;

[0010] A guiding structure laterally connected to the adjustable clamping mechanism. A transmission mechanism for driving the thickness detector to linearly move along the width direction of the beam body is integrated on the guiding structure;

[0011] An auxiliary correction assembly connecting the adjustable clamping mechanism and the guiding structure. The auxiliary correction assembly includes a rotation adjustment mechanism and a sliding compensation mechanism. The rotation adjustment mechanism adaptively adjusts the spatial pose of the guiding structure according to the surface morphology of the beam body, and the sliding compensation mechanism responds to and stabilizes the spatial pose of the guiding structure; wherein, the adjustable clamping mechanism, the guiding structure and the auxiliary correction assembly jointly construct a three-dimensional constraint system to drive the thickness detector to keep the probe axis orthogonal to the steel bar direction in the beam surface area and maintain the probe axis and the detection surface normal direction at the beam-wall junction area.

[0012] As a preferred scheme of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: the adjustable clamping mechanism includes a clamping assembly, a lateral driving assembly and a connecting assembly. The number of the clamping assemblies is two groups and they are respectively arranged on both sides of the beam surface. The two groups of clamping assemblies are installed at both ends of the connecting assembly, and the lateral driving assembly is installed on the connecting assembly. The connecting assembly is driven to expand and contract through the lateral driving assembly to adjust the distance between the two groups of clamping assemblies, so as to change the clamping force of the adjustable clamping mechanism on both sides of the beam body.

[0013] As a preferred scheme of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: the connecting assembly includes an L-shaped straight plate and an L-shaped bent plate. The L-shaped bent plate is inserted into the inner cavity of the L-shaped straight plate, and the L-shaped straight plate and the L-shaped bent plate move towards or away from each other to narrow or expand the gap between the L-shaped straight plate and the L-shaped bent plate;

[0014] The lateral driving assembly is configured as a linear motor I. The output end and itself of the linear motor I are respectively fixed on the L-shaped straight plate and the L-shaped bent plate, and the output end of the linear motor I is driven to move towards or away from each other on the L-shaped straight plate and the L-shaped bent plate.

[0015] As a preferred scheme of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: the two groups of clamping assemblies are respectively arranged on the tops of the L-shaped straight plate and the L-shaped bent plate and are supported by the L-shaped straight plate and the L-shaped bent plate to maintain the same height. The clamping assembly includes a grid plate, two acting plates and a connecting seat for connecting the two acting plates. The two acting plates are fixedly connected through the connecting seat.

[0016] Among the two groups of the clamping assemblies, the grid plate is connected to the acting plates at both ends, and the acting plates are longitudinally assembled on the L-shaped straight plate and the L-shaped bent plate through the grid plate.

[0017] As a preferred solution of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: a connecting component is further arranged between the guiding structure and the adjustable clamping mechanism. The number of the connecting components is two groups, and they are respectively fixed on the opposite surfaces of two grid plates on both sides. The connecting component includes a connecting plate and a positioning pin inserted into the free end of the connecting plate. The guiding structure rotates between the two connecting plates through the positioning pin;

[0018] The connecting plate 2241 and the grid plate 2211 are arranged at an angle of 45°.

[0019] As a preferred solution of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: the guiding structure includes a connecting part, a guiding part and a transmission mechanism. The number of the connecting parts is two groups, and they are located on both sides of the guiding part. The transmission mechanism is fixed on the surface of one connecting part, penetrates through the other connecting part and does not contact with the connecting part.

[0020] As a preferred solution of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: the connecting part includes an integrally formed locking roller plate and a side plate. The side plate is movably connected to the connecting plate through a positioning pin;

[0021] The guiding part includes a base plate and a plurality of parallel guiding rollers locked between the two locking roller plates. Under the guiding of the plurality of guiding rollers, the base plate translates along the axis direction of the guiding rollers;

[0022] The transmission mechanism includes a driving motor and a worm. The worm is connected to the output end of the driving motor. The worm penetrates through the base plate and forms a screw transmission connection with the base plate to drive the base plate to linearly move along the axis of the worm.

[0023] As a preferred solution of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: the sliding compensation mechanism is assembled on the surface of the connecting plate, and the rotation adjustment mechanism is configured as a correcting plate. One end of the guiding roller penetrates through the correcting plate, and the other end of the sliding compensation mechanism penetrates through the correcting plate.

[0024] As a preferred solution of the auxiliary device for detecting the thickness of the steel bar protective layer in the present application, wherein: a circular through groove for the guiding roller to penetrate through and a rectangular through groove for the sliding compensation mechanism to penetrate through are formed on the surface of the correcting plate. The inner diameter of the rectangular through groove is the same as the outer diameter of the guiding roller.

[0025] As a preferred solution of the auxiliary device for detecting the thickness of the steel bar protection layer described in this application, where: the sliding compensation mechanism includes a combined rod body, a spring, and a sleeve. The combined rod body includes an integrated telescopic rod body and a sleeve rod. A counter sheet is fixed at the connection of the telescopic rod body and the sleeve rod. The counter sheet presses against one side of the auxiliary correction plate, and the opening of the sleeve abuts against the other side of the auxiliary correction plate;

[0026] The telescopic rod body is arranged between the auxiliary correction plate and the connecting plate. The spring is sleeved on the telescopic rod body, and its two ends respectively abut against the auxiliary correction plate and the connecting plate.

[0027] Advantages of this application: Through the design of the gantry frame system and the side-mounted guiding structure of the adjustable clamping mechanism in this application, the spatial limitation of traditional detection equipment is broken through, and the double improvement of longitudinal height compression and lateral stability is realized; Secondly, through the double-column and cross-beam system of the adjustable clamping mechanism, the spatial attitude is automatically calibrated, so that the movement trajectory of the thickness detector is always strictly perpendicular to the direction of the steel bar, eliminating the trajectory deviation error caused by manual operation; In addition, through the dynamic balance mechanism of the auxiliary correction component, the inclination angle is automatically compensated, so that the thickness detector can still fit the surface accurately in complex areas such as the intersection of beams and walls, realizing the full-automatic attitude adjustment function and avoiding the efficiency loss caused by manual straightening. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the overall structure of an auxiliary device for detecting the thickness of the steel bar protection layer in this application;

[0030] Figure 2 It is a detailed view of the overall structure at the clamping structure in this application;

[0031] Figure 3 It is a detailed view of the overall structure at the adjustable clamping mechanism in this application;

[0032] Figure 4 For this application Figure 3 The enlarged view of the structure at point A in it;

[0033] Figure 5 It is an axonometric view of the overall structure of an auxiliary device for detecting the thickness of the steel bar protection layer in this application;

[0034] Figure 6 For this application Figure 5 The enlarged view of the structure at point B in it;

[0035] Figure 7 It is a structural detail diagram of the connection component in this application;

[0036] Figure 8 This application Figure 7 is an enlarged view of the structure at position C in it;

[0037] Figure 9 It is a structural detail diagram of the auxiliary correction component in this application.

[0038] Reference numerals: 100, handheld device; 110, handheld structure; 120, clamping structure; 121, reference frame; 122, wire track; 123, clamping long plate; 124, clamping roller; 125, linear motor II; 200, detection mechanism; 210, thickness detector; 220, adjustable clamping mechanism; 221, clamping component; 2211, grid plate; 2212, acting plate; 2213, connecting seat; 2214, thick silicone pad; 222, lateral driving component; 223, connecting component; 2231, L-shaped straight plate; 2232, L-shaped bent plate; 224, connecting component; 2241, connecting plate; 2242, positioning pin; 230, guiding structure; 231, connecting part; 2311, side plate; 2312, locking roller plate; 232, guiding part; 2321, guiding roller; 2322, base plate; 233, transmission mechanism; 2331, driving motor; 2332, worm; 234, locking plate; 240, auxiliary correction component; 241, auxiliary correction plate; 2411, rectangular through groove; 242, sliding compensation mechanism; 2421, combined rod body; 24211, telescopic rod body; 24212, sleeve rod; 24213, abutting piece; 2422, spring; 2423, sleeve. Detailed implementation manners

[0039] To make the above objects, features and advantages of this application more obvious and understandable, the following will give a detailed description of the specific implementation manners of this application in conjunction with the accompanying drawings of the specification.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of this application. However, this application can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0041] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of this application. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an independent or selectively exclusive embodiment from other embodiments.

[0042] In the process of detecting the thickness of the steel bar protective layer by the testing agency, the distribution trend of steel bars is initially determined according to the beam design drawing. By using the principle of electromagnetic induction to capture the magnetic field change of steel bars, the instrument screen displays the position, spacing and protective layer thickness value of steel bars in real time. When the probe moves perpendicular to the axis of the steel bar to the magnetic field peak, the instrument automatically locks the position of the center line of the steel bar. At this time, the built-in sensor of the probe calculates the thickness of the concrete protective layer through the time difference of electromagnetic wave reflection, and comprehensively calculates the actual exposed thickness of the steel bar in combination with the preset steel bar diameter parameter.

[0043] During the detection process, it is necessary to keep the probe in stable contact with the beam surface to avoid violent shaking, and at the same time avoid the electromagnetic interference area of metal embedded parts or adjacent steel bars. After completing the single-point measurement, arrange the measuring points at the specified spacing along the length direction of the beam, and record and store the data.

[0044] Embodiment 1

[0045] Refer to Figures 1 to 4 As shown, this is the first embodiment of the present application. This embodiment provides an auxiliary device for detecting the thickness of the steel bar protective layer, including;

[0046] A thickness detector (210) that can move along the surface of the beam, and the thickness detector (210) is configured with an electromagnetic induction probe, a housing and a roller assembly;

[0047] An adjustable clamping mechanism (220) straddling both sides of the beam. The adjustable clamping mechanism (220) realizes the adjustment of the clamping distance through a bidirectional sliding compensation mechanism, and is provided with an elastic buffer layer in contact with the side wall of the beam;

[0048] A guiding structure (230) laterally connected to the adjustable clamping mechanism (220), and a transmission mechanism (233) for driving the thickness detector (210) to move linearly along the width direction of the beam is integrated on the guiding structure (230);

[0049] An auxiliary correction assembly (240) connecting the adjustable clamping mechanism (220) and the guiding structure (230). The auxiliary correction assembly (240) includes a rotation adjustment mechanism (241) and a sliding compensation mechanism (242). The rotation adjustment mechanism (241) adaptively adjusts the spatial pose of the guiding structure (230) according to the surface shape of the beam, and the sliding compensation mechanism (242) responds and stabilizes the spatial pose of the guiding structure (230); wherein, the adjustable clamping mechanism (220), the guiding structure (230) and the auxiliary correction assembly (240) jointly construct a three-dimensional constraint system to drive the thickness detector (210) to keep the probe axis orthogonal to the steel bar trend in the beam surface area, and maintain the probe axis and the detection surface normal trend at the beam-wall junction area

[0050] The handheld device 100 is clamped on both sides of the detection mechanism 200 to raise the detection mechanism 200 so that the radian detector fits against the beam surface.

[0051] Among them, there are a thickness detector 210, an adjustable clamping mechanism 220, a guiding structure 230, a correcting component 240, and a handheld device 100.

[0052] In one embodiment, as Figure 1 and Figure 2 shown, the handheld device 100 includes a handheld structure 110 and a clamping structure 120. The handheld structure 110 is configured as a telescopic long rod, and the telescopic long rod is assembled at the bottom of the clamping structure 120. The clamping structure 120 is clamped on the surface of the adjustable clamping mechanism 220; the clamping structure 120 includes a reference frame 121. Two groups of wire tracks 122 are installed along the width direction of the reference frame 121. Two groups of clamping long plates 123 are provided along the length direction of the reference frame 121, and a plurality of equally spaced clamping rollers 124 are additionally installed at the edges of the clamping long plates 123. The clamping long plates 123 slide on the wire tracks 122. Two groups of linear motors II 125 are installed on the reference frame 121, and the two groups of linear motors II 125 are used to control the movement of the two groups of clamping long plates 123. Among them, control buttons for controlling the action of the clamping structure 120 are arranged on the surface of the handheld structure 110.

[0053] In one embodiment, the thickness detector 210 is used to measure the distance from the surface of the steel bar to the outer layer of the concrete. The thickness detector 210 includes a housing, a probe assembled on the housing, and two groups of rollers assembled on the housing. The thickness detector 210 moves perpendicular to the width of the beam surface along the axis of the steel bar.

[0054] In one embodiment, the guiding structure 230 is transverse to the lower end of the beam surface and the thickness detector 210 is installed thereon;

[0055] In one embodiment, the adjustable clamping mechanism 220 is clamped on both sides of the beam surface and is connected to the guiding structure 230 to adjust the horizontal and vertical angles of the guiding structure 230, so as to adjust the gap between the thickness detector 210 and the beam surface, and enable the thickness detector 210 to move perpendicular to the length direction of the beam surface;

[0056] In one embodiment, the correcting component 240 is connected between the adjustable clamping mechanism 220 and the guiding structure 230. The adjustable clamping mechanism 220 shrinks and clamps on the side wall of the beam body to define the position where the guiding structure 230 is located.

[0057] Specifically, as Figure 3 and Figure 4As shown, the adjustable clamping mechanism 220 includes a clamping assembly 221, a lateral driving assembly 222, and a connecting assembly 223. The number of the clamping assemblies 221 is two groups, which are respectively arranged on both sides of the beam surface. The two groups of clamping assemblies 221 are installed at both ends of the connecting assembly 223, and the lateral driving assembly 222 is installed on the connecting assembly 223. The connecting assembly 223 is driven by the lateral driving assembly 222 to expand and contract, so as to adjust the distance between the two groups of clamping assemblies 221, and change the clamping force of the adjustable clamping mechanism 220 on both sides of the beam body.

[0058] Specifically, referring to Figure 3 As shown, the connecting assembly 223 includes an L-shaped straight plate 2231 and an L-shaped bent plate 2232. The L-shaped bent plate 2232 is inserted into the inner cavity of the L-shaped straight plate 2231. The L-shaped straight plate 2231 and the L-shaped bent plate 2232 move towards or away from each other to reduce or increase the gap between the L-shaped straight plate 2231 and the L-shaped bent plate 2232.

[0059] In one embodiment, the lateral driving assembly 222 is configured as a linear motor I. The output end and itself of the linear motor I are respectively fixed on the L-shaped straight plate 2231 and the L-shaped bent plate 2232. The output end of the linear motor I moves to drive the L-shaped straight plate 2231 and the L-shaped bent plate 2232 to move towards or away from each other.

[0060] In one embodiment, the two groups of clamping assemblies 221 are respectively arranged on the tops of the L-shaped straight plate 2231 and the L-shaped bent plate 2232, and are supported by the L-shaped straight plate 2231 and the L-shaped bent plate 2232 to maintain the same height. The clamping assembly 221 includes a grid plate 2211, two acting plates 2212, and a connecting seat 2213 for connecting the two acting plates 2212. The two acting plates 2212 are fixedly connected through the connecting seat 2213.

[0061] In one embodiment, among the two groups of clamping assemblies 221, the grid plate 2211 is connected to the acting plates 2212 at both ends, and the acting plates 2212 are longitudinally assembled on the L-shaped straight plate 2231 and the L-shaped bent plate 2232 through the grid plate 2211; wherein, the two acting plates 2212 located in the middle are attached to the side wall of the beam body.

[0062] In one embodiment, through the connecting seat 2213 and the acting plate 2212, the thickness of the clamping assembly 221 is increased, and the distance between the acting plates 2212 at both ends is greater than the thickness of the beam end.

[0063] In one embodiment, thick silicone pads 2214 are assembled on the side of the two acting plates 2212 located in the middle facing the beam body. By changing the gap between the two clamping assemblies 221, the stress exerted by the acting plates 2212 on the surface of the beam body is adjusted. The thick silicone pads 2214 arranged between the surface of the beam body and the acting plates 2212 are deformed by the force to closely adhere to the surface of the wall. Among them, if the surface of the wall is pitted, the thick silicone pads 2214 can fully fill the uneven gaps through their high elastic deformation characteristics, ensuring that the adjustable clamping mechanism 220 has sufficient contact with the wall.

[0064] In terms of structural form, the clamping assembly 221, the L-shaped straight plate 2231, and the L-shaped bent plate 2232 together form an inverted portal frame system. Specifically: when the two clamping assemblies 221 are adjusted to be completely attached to the side wall of the beam body through the lateral driving assembly 222, the vertical sections of the L-shaped straight plate 2231 and the L-shaped bent plate 2232, which are the connecting parts with the clamping assembly 221, form a double-column structure. Their axes are perpendicular to the horizontal plane and are coplanar on the same reference plane; while their horizontal sections extend parallel to the bottom surface of the beam body, forming a transverse load-bearing beam spanning the width of the beam body. Among them, due to the regular rectangular cross-section characteristics of the beam body itself, that is, the side wall and the bottom surface of the beam body are strictly orthogonal, forcing the horizontal section of the L-shaped member to always be disposed along the axis of the beam body. This portal frame system can form three-point constraints: the two clamping assemblies 221 provide normal clamping forces on both sides of the beam body, and the horizontal section of the L-shaped member resists lateral offset through the span stiffness, thereby constructing a space constraint system with self-stabilizing characteristics. Under the constraint of this portal frame system, the guiding structure 230 also forms a transverse load-bearing beam structure spanning the width of the beam body, driving the thickness detector 210 guided by the guiding structure 230 to move precisely in a straight line along the width direction of the beam body, effectively eliminating the trajectory offset error caused by manual operation, ensuring that the probe axis is always strictly orthogonal to the steel bar distribution direction, and thus improving the accuracy of magnetic field peak positioning and protective layer thickness measurement.

[0065] Embodiment 2

[0066] Refer to Figures 5 to 9 As shown, this is the second embodiment of the present application. This embodiment is based on the previous embodiment. The difference is that a connecting component 224 is further provided between the guiding structure 230 and the adjustable clamping mechanism 220. The number of the connecting components 224 is two, and they are respectively fixed on the opposite sides of the two grid plates 2211 on both sides. The connecting component 224 includes a connecting plate 2241 and a positioning pin 2242 inserted into the free end of the connecting plate 2241. The guiding structure 230 rotates between the two connecting plates 2241 through the positioning pin 2242.

[0067] In one embodiment, the connecting plate 2241 and the grid plate 2211 are arranged at an angle of 45°.

[0068] In one embodiment, asFigure 5 , Figure 6 and Figure 8 As shown in Figure 8 , the guiding structure 230 includes a connecting portion 231, a guiding portion 232, and a transmission mechanism 233. The number of connecting portions 231 is two groups, and they are located on both sides of the guiding portion 232. The transmission mechanism 233 is fixed on the surface of one connecting portion 231, penetrates through the other connecting portion 231 and does not contact the connecting portion 231. Among them, the connecting portion 231 includes an integrated locking roller plate 2312 and a side plate 2311. The side plate 2311 is movably connected to the connecting plate 2241 through a positioning pin 2242. The guiding portion 232 includes a base plate 2322 and multiple parallel guiding rollers 2321 locked between two locking roller plates 2312. A moving pair combination constraint system is formed between the multiple guiding rollers 2321 and the base plate 2322, allowing the base plate 2322 to translate along the axis direction of the guiding rollers 2321, but strictly restricting the movement of the other five degrees of freedom. The transmission mechanism 233 includes a driving motor 2331 and a worm 2332. The worm 2332 is connected to the output end of the driving motor 2331. Driven by the driving motor 2331, the worm 2332 makes a rotational motion. The worm 2332 penetrates through the base plate 2322 and forms a screw drive connection with the base plate 2322 to drive the base plate 2322 to linearly move along the axis of the worm 2332.

[0069] In one embodiment, as Figure 8 shown, the thickness detector 210 is installed on the base plate 2322.

[0070] In one embodiment, a set of locking plates 234 is locked on the housing of the thickness detector 210 for stability, and multiple screws are assembled between the locking plates 234 and the base plate 2322 for fixation.

[0071] Space constraint is achieved by constructing a self-stabilizing gantry frame system. A double-column - crossbeam structure composed of an L-shaped straight plate 2231 and an L-shaped bent plate 2232 is adopted. Combining the normal clamping force of the two-side clamping assemblies 221 and the span stiffness of the transverse bearing beam for these three-point positioning, the guiding structure 230 also presents perpendicular to the beam axis through the connecting component 224. The guiding structure 230 strictly restricts the movement degrees of freedom of the thickness detector 210 through a moving pair combination constraint system composed of multiple parallel guiding rollers 2321 and the base plate 2322. Cooperating with the screw drive mechanism of the worm 2332 to convert the rotational motion of the driving motor 2331 into a high-precision linear displacement of the thickness detector 210. At the same time, the 45° inclined design of the connecting component 224 forms a universal joint effect, allowing the guiding structure 230 to adaptively adjust the pitching angle to compensate for the unevenness of the beam surface.

[0072] Secondly, the side-mounted guiding structure 230 of this device is arranged rather than directly vertically installed. The core lies in achieving longitudinal dimension compression through spatial dislocation design: the guiding structure 230 is connected to the side of the grid plate 2211 of the adjustable clamping mechanism 220 through an inclined connecting component 224 at 45°, so that the movement plane of the base plate 2322 of the guiding structure 230 and the vertical sections of the L-shaped straight plate 2231 and the L-shaped bent plate 2232 of the adjustable clamping mechanism 220 are in a non-coplanar state. This design transfers the working path of the thickness detector 210 from the "area directly below the gantry" in the traditional vertical hanging to the "side projection area of the gantry", effectively avoiding the rigid occupation of the space below by the columns of the adjustable clamping mechanism 220 itself. In specific implementation, the inclined connection point of the connecting plate 2241 moves the whole guiding structure 230 outwards by a certain distance. Compared with the vertical stacking structure, the total longitudinal height is greatly reduced to prevent the longitudinal space length of the detection mechanism 200 from being too long, thereby hindering the movement of personnel on the construction site.

[0073] In traditional steel bar cover thickness detection operations, the detector usually relies on the bottom rollers to contact the beam surface to maintain balance. When the detector moves in the middle of a flat beam surface, all four rollers contact the concrete surface simultaneously. The instrument controls the movement trajectory through the built-in infrared guiding system. At this time, the stable contact of the two groups of symmetric rollers can ensure that the probe axis is parallel to the steel bar direction, thus achieving accurate measurement of the cover thickness. However, when the detection path extends to the edge area of the beam body, only one group of rollers of the detector can contact the effective working surface, and the rest of the rollers are suspended, resulting in the loss of balance of the whole instrument. At this time, the probe axis is prone to tilt and shift, and significant deviations occur in the detection data.

[0074] Embodiment 3

[0075] Refer to Figures 5 to 9 As shown, this is the third embodiment of this application. Based on the previous two embodiments, the difference is that the slip compensation mechanism 242 is assembled on the surface of the connecting plate 2241, the rotation adjustment mechanism 241 is configured as a correction plate, one end of the guiding roller 2321 penetrates through the correction plate, and the other end of the slip compensation mechanism 242 penetrates through the correction plate.

[0076] Specifically, while the guiding roller 2321 penetrates through one end of the auxiliary rectifying plate to form a rotation fulcrum, the slip compensation mechanism 242 penetrates through the other end to form an adjustable force arm. The two work together to convert the gravitational potential energy of the thickness detector 210 into a stable torque on the guiding structure 230. Specifically, when the guiding structure 230 has a downward inclination trend due to its own weight, the slip compensation mechanism 242 forces the auxiliary rectifying plate to generate a reverse rotation moment around the axis of the guiding roller 2321, thereby maintaining the thickness detector 210 always at the upper reference plane of the guiding structure 230. The anti-gravity positioning mechanism I composed of the auxiliary rectifying plate and the slip compensation mechanism 242 overcomes the dilemma that the thickness detector 210 sags in the side-mounted layout and cannot be measured.

[0077] In one embodiment, a round through groove for the guiding roller 2321 to penetrate through and a rectangular through groove 2411 for the slip compensation mechanism 242 to penetrate through are formed on the surface of the auxiliary rectifying plate. The inner diameter of the rectangular through groove 2411 is the same as the outer diameter of the guiding roller 2321.

[0078] Specifically, the round through groove serves as the rotation fulcrum of the guiding roller 2321, and together with the guiding groove width of the rectangular through groove 2411, a "rotation + slip" compound kinematic pair is formed. When detecting the horizontal beam surface, the guiding roller 2321 slides along the rectangular through groove 2411 to form a 0° reference plane; when measuring the triangular connection area of the beam wall, the slip compensation mechanism 242 slides within the rectangular through groove 2411, driving the thickness detector 210 to generate a corresponding inclination angle, so as to break through the limitation that the traditional detection device is only applicable to the orthogonal plane, and is particularly suitable for the quality assessment of the protective layer in complex node areas.

[0079] In one embodiment, the slip compensation mechanism 242 includes a combined rod body 2421, a spring 2422, and a sleeve 2423. The combined rod body 2421 includes an integral telescopic rod body 24211 and a sleeve rod 24212. A pressing piece 24213 is fixed at the connection between the telescopic rod body 24211 and the sleeve rod 24212. The pressing piece 24213 presses against one side of the auxiliary rectifying plate, and the opening of the sleeve 2423 abuts against the other side of the auxiliary rectifying plate.

[0080] In one embodiment, the telescopic rod body 24211 is arranged between the auxiliary rectifying plate and the connecting plate 2241. The spring 2422 is sleeved on the telescopic rod body 24211, and its two ends respectively abut against the auxiliary rectifying plate and the connecting plate 2241.

[0081] In one embodiment, the outer diameter dimension of the sleeve rod 24212 is the same as the inner diameter dimension of the sleeve 2423.

[0082] Specifically, when the roller of the thickness detector 210 abuts against the beam surface, according to the actual inclination of the actual beam surface, the sleeve 2423 and the sleeve rod 24212 slide within the rectangular through groove 2411 of the auxiliary correction plate. When the adjustable clamping mechanism 220 clamps on the side wall of the beam body and the connecting plate 2241 moves relatively towards the side surface of the beam body, the auxiliary correction plate moves synchronously with the connecting plate 2241, and the telescopic rod body 24211 is continuously compressed. The compressed telescopic rod body 24211 generates a reaction force to make the sleeve 2423 and the sleeve rod 24212 abut against the side surface of the beam body. The sleeve 2423 and the abutting piece 24213 jointly squeeze the auxiliary correction plate to position the auxiliary correction plate, and the positioned auxiliary correction plate reversely positions the guiding roller 2321, that is, the position of the reverse positioning guiding structure 230.

[0083] When the guiding structure 230 is positioned, the thickness detector 210 moves in the direction perpendicular to the axis of the beam body under the action of the guiding structure 230. Even when the wheel body of the thickness detector 210 does not contact the beam surface, it always detects along an accurate route, ensuring the accuracy of the detection.

[0084] Of course, the above content is only the preferred embodiment of the present application and cannot be considered as limiting the scope of the embodiments of the present application. The present application is not limited to the above examples. Equivalent changes and improvements made by those of ordinary skill in the art within the essence of the present application shall fall within the scope covered by the patent of the present application.

[0085] Finally, several points should be noted: First, in the description of the present application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the internal communication of two components. It can be directly connected. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0086] Second: In the drawings of the disclosed embodiments of the present application, only the structures related to the disclosed embodiments of the present application are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0087] Finally: The above is only the preferred embodiment of the present application and is not used to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An auxiliary device for detecting the thickness of the steel bar protection layer, characterized in that, Including: A thickness detector (210) that can move along the surface of the beam body. The thickness detector (210) is configured with an electromagnetic induction probe, a housing, and a roller assembly; An adjustable clamping mechanism (220) straddling both sides of the beam body. The adjustable clamping mechanism (220) adjusts the clamping distance through a bidirectional sliding compensation mechanism and is provided with an elastic buffer layer in contact with the side wall of the beam body; A guiding structure (230) laterally connected to the adjustable clamping mechanism (220). A transmission mechanism (233) for driving the thickness detector (210) to move linearly along the width direction of the beam body is integrated on the guiding structure (230); An auxiliary correction assembly (240) connecting the adjustable clamping mechanism (220) and the guiding structure (230). The auxiliary correction assembly (240) includes a rotation adjustment mechanism (241) and a sliding compensation mechanism (242). The rotation adjustment mechanism (241) adaptively adjusts the spatial pose of the guiding structure (230) according to the surface morphology of the beam body, and the sliding compensation mechanism (242) responds to and stabilizes the spatial pose of the guiding structure (230); wherein, the adjustable clamping mechanism (220), the guiding structure (230), and the auxiliary correction assembly (240) jointly construct a three-dimensional constraint system to drive the thickness detector (210) to keep the probe axis orthogonal to the steel bar direction in the beam surface area and maintain the probe axis and the detection surface normal direction in the beam-wall junction area.

2. The auxiliary device for detecting the thickness of the steel bar protection layer according to claim 1, wherein: The adjustable clamping mechanism (220) includes a clamping assembly (221), a lateral driving assembly (222), and a connecting assembly (223). The number of the clamping assemblies (221) is two groups and they are respectively arranged on both sides of the beam surface. The two groups of clamping assemblies (221) are installed at both ends of the connecting assembly (223). The lateral driving assembly (222) is installed on the connecting assembly (223), and the connecting assembly (223) is driven to expand and contract through the lateral driving assembly (222) to adjust the distance between the two groups of clamping assemblies (221), so as to change the clamping force of the adjustable clamping mechanism (220) on both sides of the beam body.

3. The auxiliary device for detecting the thickness of the steel bar protection layer according to claim 2, wherein: The connecting assembly (223) includes an L-shaped straight plate (2231) and an L-shaped bent plate (2232). The L-shaped bent plate (2232) is inserted into the inner cavity of the L-shaped straight plate (2231), and the L-shaped straight plate (2231) and the L-shaped bent plate (2232) move towards or away from each other to narrow or expand the gap between the L-shaped straight plate (2231) and the L-shaped bent plate (2232); The lateral driving assembly (222) is configured as a first linear motor. The output end and itself of the first linear motor are respectively fixed on the L-shaped straight plate (2231) and the L-shaped bent plate (2232), and the output end of the first linear motor is moved to drive the L-shaped straight plate (2231) and the L-shaped bent plate (2232) to move towards or away from each other.

4. The auxiliary device for detecting the thickness of the steel bar protective layer according to claim 3, characterized in that: Two sets of the clamping assemblies (221) are respectively arranged on the tops of the L-shaped straight plate (2231) and the L-shaped bent plate (2232), and are supported by the L-shaped straight plate (2231) and the L-shaped bent plate (2232) to maintain the same height. The clamping assembly (221) includes a grille plate (2211), two acting plates (2212), and a connecting seat (2213) for connecting the two acting plates (2212). The two acting plates (2212) are fixedly connected through the connecting seat (2213). In the two sets of the clamping assemblies (221), the grille plate (2211) is connected to the acting plates (2212) at both ends, and the acting plates (2212) are longitudinally assembled on the L-shaped straight plate (2231) and the L-shaped bent plate (2232) through the grille plate (2211).

5. The auxiliary device for detecting the thickness of the steel bar protection layer according to claim 4, characterized in that: A connecting component (224) is further arranged between the guiding structure (230) and the adjustable clamping mechanism (220). The number of the connecting components (224) is two, and they are respectively fixed on the opposite sides of the two grille plates (2211) on both sides. The connecting component (224) includes a connecting plate (2241) and a positioning pin (2242) inserted into the free end of the connecting plate (2241). The guiding structure (230) rotates between the two connecting plates (2241) through the positioning pin (2242); The connecting plate (2241) and the grille plate (2211) are arranged at an angle of 45°.

6. The auxiliary device for detecting the thickness of the steel bar protective layer according to claim 5, characterized in that: The guiding structure (230) includes a connecting portion (231), a guiding portion (232), and a transmission mechanism (233). The number of the connecting portions (231) is two, and they are located on both sides of the guiding portion (232). The transmission mechanism (233) is fixed on the surface of one of the connecting portions (231), penetrates through the other connecting portion (231) and does not contact the connecting portion (231).

7. The auxiliary device for detecting the thickness of the steel bar protection layer according to claim 6, characterized in that: The connecting portion (231) includes an integrally formed locking roller plate (2312) and a side plate (2311). The side plate (2311) is movably connected to the connecting plate (2241) through the positioning pin (2242); The guiding portion (232) includes a base plate (2322) and a plurality of parallel guiding rollers (2321) locked between the two locking roller plates (2312). Under the guiding of the plurality of guiding rollers (2321), the base plate (2322) translates along the axis direction of the guiding rollers (2321); The transmission mechanism (233) includes a driving motor (2331) and a worm (2332). The worm (2332) is connected to the output end of the driving motor (2331). The worm (2332) penetrates through the base plate (2322) and forms a screw transmission connection with the base plate (2322) to drive the base plate (2322) to linearly move along the axis of the worm (2332).

8. The auxiliary device for detecting the thickness of the steel bar protective layer according to claim 7, characterized in that: The slip compensation mechanism (242) is assembled on the surface of the connecting plate (2241), and the rotation adjustment mechanism (241) is configured as a correction plate. One end of the guiding roller (2321) penetrates through the correction plate, and the other end of the slip compensation mechanism (242) penetrates through the correction plate.

9. The auxiliary device for detecting the thickness of the steel bar protection layer according to claim 8, characterized in that: A circular through groove for the guiding roller (2321) to penetrate through and a rectangular through groove (2411) for the slip compensation mechanism (242) to penetrate through are formed on the surface of the correction plate. The inner diameter of the rectangular through groove (2411) is the same as the outer diameter of the guiding roller (2321).

10. The auxiliary device for detecting the thickness of the steel bar protective layer according to claim 9, characterized in that: The slip compensation mechanism (242) includes a combined rod body (2421), a spring (2422), and a sleeve (2423). The combined rod body (2421) includes an integrated telescopic rod body (24211) and a sleeve rod (24212). A contact piece (24213) is fixed at the connection of the telescopic rod body (24211) and the sleeve rod (24212). The contact piece (24213) presses against one side of the correction plate, and the opening of the sleeve (2423) abuts against the other side of the correction plate. The telescopic rod body (24211) is arranged between the correction plate and the connecting plate (2241). The spring (2422) is sleeved on the telescopic rod body (24211), and its two ends respectively abut against the correction plate and the connecting plate (2241).

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