A device for monitoring steel corrosion in reinforced concrete structures

Abstract

The present invention relates to the technical field of steel bar detection, and discloses a steel bar corrosion monitoring device in a reinforced concrete structure, including a monitoring host, an electrode rod and a steel bar clamp, a sponge block is arranged at one end of the electrode rod, the electrode rod is connected to the monitoring host through a signal line A, and the steel bar clamp is connected to the monitoring host through a signal line B, and also includes a bracket, the bracket is connected to the monitoring host through a connecting block, and a positioning sleeve for binding the electrode rod is slidably arranged on the surface of the bracket; a connection component is arranged on one side of the bracket, and the connection component includes an extension rod penetrated on the surface of the bracket, and a conductive member is arranged on the surface of the extension rod. The present invention compensates for the missing part of the conductive distance of the concrete wall through the conductive sheet by matching the mutually crossed right-angled extension rod and the bracket, and the current contacts the electrode rod after passing through the conductive sheet and generates potential difference data during steel bar detection, thereby effectively improving the accuracy and applicability of steel bar corrosion monitoring in reinforced concrete.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar detection, and more specifically, to a steel bar corrosion monitoring device in a reinforced concrete structure. Background Art

[0002] Reinforced concrete is a composite material consisting of concrete and steel bars, which is widely used in construction and civil engineering. Its advantage is that concrete provides excellent compressive strength, while steel bars enhance tensile strength. The combination of the two optimizes strength and improves the supporting strength of modern buildings.

[0003] Reinforced concrete structures may be affected by a variety of environmental factors (such as humidity, temperature changes, and chemical erosion) during their use, causing corrosion of the steel bars. The corrosion of the steel bars will not only reduce the durability and bearing capacity of the concrete, but may also cause structural safety hazards. Therefore, it is necessary to detect the corrosion of the steel bars in reinforced concrete.

[0004] At present, electrochemical monitoring devices are mostly used for corrosion detection of steel bars. The detection method is to chisel open the concrete wall and partially expose the steel bar body, clamp the steel bar body with a steel bar clamp, and use an electrode rod to contact multiple preset points on the concrete wall for detection. In the actual detection process, due to the different flatness of reinforced concrete walls of different buildings, the outer wall where the steel bars to be detected are located may have a series of conditions that affect the flatness, such as damage and pits. At this time, when monitoring steel bar corrosion, the point where the electrode rod contacts the pit is closer to the steel bar body than the point on the flat wall. The distance traveled by the corresponding current path will be shortened, which will cause errors in the detection potential difference to a certain extent, affecting the consistency of detection at each point, and is not conducive to obtaining accurate data for steel bar corrosion monitoring. Summary of the invention

[0005] The present invention provides a steel bar corrosion monitoring device in a reinforced concrete structure, which solves the technical problems in the above-mentioned background technology.

[0006] The present invention provides a steel bar corrosion monitoring device in a reinforced concrete structure, comprising a monitoring host, an electrode rod and a steel bar clamp, wherein a sponge block is arranged at one end of the electrode rod, the electrode rod is connected to the monitoring host through a signal line A, and the steel bar clamp is connected to the monitoring host through a signal line B, and further comprising:

[0007] A bracket, the bracket is connected to the monitoring host through a connecting block, and a positioning sleeve for binding the electrode rod is slidably provided on the surface of the bracket;

[0008] A connection component is arranged on one side of the bracket, the connection component includes an extension rod penetrating the surface of the bracket, a conductive member is arranged on the surface of the extension rod, and a connecting component for connecting the electrode rod with the conductive member is installed on the surface of the bracket. When the bracket is attached to a flat concrete wall, the extension rod can slide on the surface of the bracket and extend to the inside of the wall depression;

[0009] It also includes a contact component for improving the coupling degree between the conductive member and the recessed part of the wall surface.

[0010] Preferably, the conductive member comprises a conductive sheet, which is laid on the surface of the extension rod in a direction parallel to the axis of the extension rod, and a contact head is provided at one end of the conductive sheet, which is parallel to the plane of one end of the extension rod after being bent.

[0011] Preferably, the conductive part includes a plurality of conductive sheets, which are laid on the surface of the extension rod in a direction parallel to the axis of the extension rod, and resistance blocks are abutted between adjacent conductive sheets. A contact head is provided at one end of the conductive sheet, and the contact head is parallel to the plane of one end of the extension rod after bending. It also includes an extrusion plate abutting against the end of the conductive sheet away from the contact head, and the extrusion plate is connected to the extension rod through a spring B.

[0012] Preferably, the connecting component includes a connecting block, a connecting hole is provided on one side of the bracket surface close to the extension rod, the connecting block is fixedly connected to the inner wall of the connecting hole, and a sliding groove is provided inside the extension rod, the connecting block slides in the sliding groove, one end of the sliding groove located inside the extension rod is connected to the bottom of the conductive sheet, the connecting block is connected to the conductive sheet through a connecting piece, a stopper is hinged on the inner wall of the connecting hole, a connecting guide block is fixedly connected to the hinge axis between the stopper and the inner wall of the connecting hole, and when the stopper rotates to a right-angle intersection with the bracket, the connecting guide block contacts the connecting block.

[0013] Preferably, the connecting member is a conductive slider or a conductive brush.

[0014] Preferably, the contact assembly includes a movable plate, a plurality of through holes are provided on the surface of the movable plate, a contact cavity and a storage cavity are respectively provided at one end of the extension rod close to the contact head, the contact head is located in the contact cavity, an annular groove is provided on the inner wall of the extension rod close to the contact cavity and between the storage cavity, the movable plate slides in the annular groove, and the movable plate is connected to the inner wall of the annular groove through a plurality of springs A, a plurality of contact rods are passed through the extension rod, and the contact rods abut against the movable plate.

[0015] Preferably, a retaining ring A and a retaining ring B are fixedly connected to both sides of the movable plate, and the retaining ring A and the retaining ring B are both soft sealing gaskets.

[0016] Preferably, it also includes an extrusion component, which includes an active chamber and a ventilation chamber opened in the extension rod, one end of the ventilation chamber is connected to the active chamber, and the other end is connected to the external air, one end of the active chamber is connected to the inside of the storage chamber, a movable rod is slidably connected in the active chamber, one end of the movable rod is fixedly connected to an extrusion block, the size of the extrusion block is equivalent to the size of the inner wall of the storage chamber, a push rod is movably connected to the side of the movable plate close to the extrusion block, one end of the push rod passes through the extrusion block and the active rod respectively, and extends to the inner wall of the movable rod, a gear is provided inside the movable rod, and an adjustment hole matching the gear is provided on the surface of the movable rod, connecting shafts are provided at both ends of the gear, one end of the connecting shaft passes through the adjustment hole, and is rotatably connected to the inner wall of the active chamber, one end of the push rod located inside the movable rod is fixedly connected to a rack, the rack is meshed with the gear, and the inner wall of the movable rod is provided with a plurality of tooth grooves matching the gear.

[0017] Preferably, the steel bar clamp comprises two mutually hinged jaws, an arc block is provided on the side where the two jaws are close to each other, arc grooves are provided on both sides of the arc block, and the jaws are connected to the arc grooves through a connecting rod.

[0018] Preferably, two slots adapted to the electrode rods are provided on a side of the bracket away from the positioning sleeve.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention cooperates with a bracket that crosses each other at a right angle. The bracket is attached to the concrete wall as a flat reference, and the extension rod is inserted into the damaged pit on the concrete wall. The conductive sheet then compensates for the missing conductive distance of the concrete wall. After the current passes through the conductive sheet, it contacts the electrode rod and generates potential difference data during steel bar detection, so that the point detection position at the pit is further overlapped with the flat wall detection position, effectively improving the accuracy and applicability of steel bar corrosion monitoring in reinforced concrete.

[0021] 2. The present invention provides a conductive channel composed of multiple conductive sheets and resistor blocks, and provides a certain number of resistor blocks to simulate the resistance effect of the concrete wall to the passage of current, thereby further improving the accuracy of steel corrosion monitoring.

[0022] 3. The present invention provides a contact assembly, and several contact rods are arranged at one end of the extension rod. When contacting the uneven wall surface, damaged surface, or pit surface, the movable plate can be pushed to present an angle adapted to the shape of the pit by moving different strokes, and the conductive paste in the storage cavity can be squeezed out through the through hole. The conductive paste can be more comprehensively coupled to the damaged part of the uneven wall surface, and provide a more stable conductive effect for the contact head, thereby further improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of another side of the present invention;

[0025] Figure 3 It is a schematic diagram of the present invention for illustrating the connection relationship between the bracket and the extension rod;

[0026] Figure 4 It is a schematic diagram of one embodiment of the present invention for demonstrating a conductive member;

[0027] Figure 5 It is a schematic diagram of another embodiment of the present invention for showing a conductive member;

[0028] Figure 6 It is a cross-sectional view of the present invention for showing the internal structure of the chute;

[0029] Figure 7 is a cross-sectional view of the present invention for showing a contact assembly;

[0030] Figure 8 is a cross-sectional view of the present invention for showing an extrusion assembly;

[0031] Fig. 9 It is a schematic diagram of the present invention for showing a steel bar clamp and its surface structure;

[0032] Fig.10 It is a schematic diagram of the present invention for demonstrating another use of the device;

[0033] Fig.11 It is a schematic diagram of the present invention for showing the working state of the device.

[0034] In the figure: 1, monitoring host; 11, connecting block; 12, bracket; 13, stopper; 131, connecting guide block; 14, slot; 15, positioning sleeve; 2, electrode rod; 21, signal line A; 22, sponge block; 3, steel bar clamp; 31, signal line B; 32, arc block; 33, connecting rod; 4, extension rod; 41, conductive sheet; 411, contact head; 412, resistor block; 413, slide slot; 414, Connecting block; 415, connecting piece; 42, contact cavity; 421, movable plate; 422, through hole; 423, retaining ring A; 424, retaining ring B; 425, contact rod; 426, spring A; 427, push rod; 43, storage cavity; 431, movable cavity; 432, ventilation cavity; 433, movable rod; 434, extrusion block; 435, gear; 436, adjustment hole; 44, extrusion plate; 441, spring B. DETAILED DESCRIPTION

[0035] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0036] In one embodiment of the present invention, a steel bar corrosion monitoring device in a reinforced concrete structure is disclosed. Figure 1 , Figure 2 As shown, it includes: a monitoring host 1, an electrode rod 2 and a steel bar clamp 3, wherein the monitoring host 1 is used as a data display terminal, and signal interfaces for connecting the electrode rod 2 and the steel bar clamp 3 are respectively arranged on both sides thereof, the electrode rod 2 is a copper sulfate electrode rod, and a copper sulfate solution is arranged inside it as a part of the standard reference electrode, so as to provide a stable reference potential, which is convenient for subsequent detection of potential difference, and the steel bar clamp 3 is used to clamp on the exposed steel bar surface, and the steel bar clamp 3 is used as a fixed electrode, which is stably clamped on the steel bar surface to be detected, which is convenient for subsequent formation of a stable monitoring potential difference, and a sponge block 22 is arranged at one end of the electrode rod 2, and the soft nature of the sponge block 22 facilitates more comprehensive contact with the detection surface of the concrete wall, and after being soaked, it ensures the wetness of the electrode and improves the conductive effect, the electrode rod 2 is connected to the monitoring host 1 through a signal line A21, and the steel bar clamp 3 is connected to the monitoring host 1 through a signal line B31, and the signal line A21 and the signal line B31 They are respectively connected to the signal interfaces on both sides of the monitoring host 1, and the end of the signal line A21 away from the monitoring host 1 is connected to the electrode rod 2, and the end of the signal line B31 away from the monitoring host 1 is connected to the steel bar clamp 3. It also includes a bracket 12, and the bracket 12 is used to be close to the concrete wall to be measured. The bracket 12 is connected to the monitoring host 1 through a connecting block 11. The connecting block 11 is hinged on the surface of the bracket 12, and the connecting block 11 can be connected to the monitoring host 1 by fixing, bolting, snap-fitting, etc., so that the monitoring host 1 can be installed on the surface of the connecting block 11 without additional hand-holding. A positioning sleeve 15 for binding the electrode rod 2 is slidably provided on the surface of the bracket 12. The positioning sleeve 15 is an insulating soft material, such as rubber or silicone material, or a nylon material with a certain elasticity. In this way, the electrode rod 2 can be bound to the surface of the bracket 12 through the positioning sleeve 15 without additional hand-holding. The electrode rod 2 can be moved by sliding the positioning sleeve 15.

[0037] The connection component is arranged on one side of the bracket 12, and the connection component includes an extension rod 4 that penetrates the surface of the bracket 12, and a conductive member is arranged on the surface of the extension rod 4. A connecting component for connecting the electrode rod 2 with the conductive member is installed on the surface of the bracket 12. When the bracket 12 is attached to a flat concrete wall, the extension rod 4 can slide on the surface of the bracket 12 and extend to the inside of the concave wall;

[0038] The invention also comprises a contact component for improving the coupling degree between the conductive member and the concave part of the wall surface.

[0039] Specifically, the rebar clamp 3 is clamped on the exposed surface of the rebar, and the electrode rod 2 is operated to stick to the concrete wall point for electrochemical detection. When the detection point is in a damaged wall or a pit, the bracket 12 is pressed against a flat part of the wall, and the extension rod 4 is aligned with the detection point in the pit. The extension rod 4 is slid on the surface of the bracket 12 to advance it to the surface of the point in the pit, and the contact component is used to fully contact the uneven damaged surface. The electrode rod 2 is contacted with the concrete through the conductive part through the connecting component, and the current passing distance is extended through the conductive part to compensate for the shortened path of the current return caused by the pit on the wall.

[0040] See also Figure 4 As shown, in one embodiment, the conductive member includes a conductive sheet 41, which is a copper sheet for providing good conductivity. The conductive sheet 41 is laid on the surface of the extension rod 4 in a direction parallel to the axis of the extension rod 4, and a contact head 411 is provided at one end of the conductive sheet 41. After being bent, the contact head 411 is parallel to the plane of one end of the extension rod 4. When one end of the extension rod 4 contacts the inner surface of the concrete pit, conduction is performed through the bent contact head 411.

[0041] See also Figure 5 and Figure 6 As shown, in a parallel embodiment, the conductive member includes a plurality of conductive sheets 41, which are copper sheets. The plurality of conductive sheets 41 are laid on the surface of the extension rod 4 in a direction parallel to the axis of the extension rod 4, and a resistor block 412 is abutted between adjacent conductive sheets 41. The resistance value of the resistor block 412 can be determined according to the self-resistance of concrete of different shapes and conditions, and the resistor block 412 can be connected to the conductive sheet 41 by welding or cross clamping, thereby improving the contact effect and conductive efficiency of the two. A contact head 411 is provided at one end of the conductive sheet 41, and the contact head 411 is parallel to the plane of one end of the extension rod 4 after bending. It also includes an extrusion plate 44 abutting against the end of the conductive sheet 41 away from the contact head 411. The extrusion plate 44 is connected to the extension rod 4 through a spring B441, and the two ends of the spring B441 are fixedly connected to the extrusion plate 44 and the extension rod 4 respectively. Through the elastic action of the spring B441, the extrusion plate 44 can be pushed to be close to the surface of the conductive sheet 41, so that the plurality of conductive sheets 41 and the resistor block 412 are in close contact.

[0042] It is worth noting that the number of resistor blocks 412 can be increased or decreased according to the needs of the resistance value. After one of the resistor blocks 412 located between two conductive sheets 41 is taken out, the two adjacent conductive sheets 41 can be instantly attached together through the elastic push of the spring B441 to form a conductive path, and the conductive sheet 41 and the resistor block 412 can be freely combined while ensuring close contact.

[0043] See also Figure 6 As shown, in this embodiment, the connecting component includes a connecting block 414, a connecting hole is provided on the side of the surface of the bracket 12 close to the extension rod 4, the connecting block 414 is fixedly connected to the inner wall of the connecting hole, and a slide groove 413 is provided inside the extension rod 4, the connecting block 414 slides in the slide groove 413, one end of the slide groove 413 located inside the extension rod 4 is connected to the bottom of the conductive sheet 41, the connecting block 414 is connected to the conductive sheet 41 through a connecting piece 415, a stopper 13 is hinged on the inner wall of the connecting hole, the size of the stopper 13 is adapted to the size of the electrode rod 2, and is used to directly contact the sponge block 22 of the electrode rod 2, and a connecting guide block 131 is fixedly connected to the hinge axis of the stopper 13 and the inner wall of the connecting hole, when the stopper 13 rotates to a right-angle intersection with the bracket 12, the connecting guide block 131 contacts the connecting block 414.

[0044] Furthermore, the connecting member 415 is a conductive slider or a conductive brush.

[0045] Specifically, by rotating and unfolding the block 13, the block 13 drives the connecting guide block 131 to rotate until it contacts the surface of the connecting block 414, thereby forming a connecting path, wherein the block 13 and the connecting guide block 131 are both conductors that can pass electricity, such as copper, and the connecting block 414 is also made of copper. A conductive slider or conductive brush fixed at one end of the connecting block 414 directly contacts the conductive sheet 41 or the resistor block 412. Therefore, during the sliding of the extension rod 4 on the surface of the bracket 12, the conductive slider or conductive brush can slide on the surface of the conductive sheet 41 or the resistor block 412 and always remain in a connected state. Moreover, since the conductive slider or conductive brush slides on the surface of the conductive sheet 41 or the resistor block 412, the connection position can be adjusted, and the moving distance of the current on the surface of the conductive sheet 41 can also be adjusted, thereby adapting to the concrete surface pits or damaged inner surfaces of different sizes and depths.

[0046] It is worth noting that see Figure 2 and Figure 3As shown, after the stopper 13 is rotated back to the state where it overlaps with the bracket 12, the positioning sleeve 15 can be moved forward to drive the electrode rod 2 to move forward. At this time, the bracket 12 can be erected to a state perpendicular to the concrete wall, and the contact monitoring of the conventional flat concrete wall point can be performed by the electrode rod 2. During this period, the extension rod 4 perpendicular to the bracket 12 can be used as a vertical detection reference. One side of the extension rod 4 is set as a flat surface, which can be used to stick to the flat concrete wall, so that the bracket 12 can remain perpendicular to the wall, and then the electrode rod 2 can remain perpendicular to the wall, thereby improving the accuracy of the contact test of the concrete wall using the electrode rod 2.

[0047] See also Figure 7 and Figure 8 As shown, in this embodiment, the contact assembly includes a movable plate 421, which is in a circular arc shape with a recessed center. A plurality of through holes 422 are provided on the surface of the movable plate 421, and the through holes 422 pass through both sides of the movable plate 421. A contact cavity 42 and a storage cavity 43 are respectively provided at one end of the extension rod 4 close to the contact head 411, and the contact head 411 is located in the contact cavity 42. An annular groove is provided on the inner wall of the extension rod 4 close to the contact cavity 42 and the storage cavity 43. The movable plate 421 slides in the annular groove, and the movable plate 421 is connected to the inner wall of the annular groove through a plurality of springs A426. The two ends of the spring A426 are fixedly connected to the movable plate 421 and the inner wall of the annular groove, respectively. A plurality of contact rods 425 are passed through the extension rod 4, and the plurality of contact rods 425 are distributed in a ring shape around the movable plate 421, and the contact rods 425 abut against the movable plate 421.

[0048] Specifically, by storing the conductive paste in the storage cavity 43, the conductive paste is set to be a low-viscosity conductive paste, which is convenient for cleaning after rapid detection. Since the plurality of contact rods 425 are distributed in a ring around the movable plate 421, when the extension rod 4 is pushed to the inner surface of the wall pit, the plurality of contact rods 425 at one end thereof first contact the uneven inner surface of the wall pit, and during the continuous movement of the extension rod 4, the contact rod 425 is moved toward the direction of the movable plate 421 by the reaction force of the wall, and accordingly pushes the movable plate 421, compressing the spring A426, and the movable plate 421 is pushed toward the inside of the storage cavity 43. The movable plate 421 is moved to squeeze out the conductive paste in the storage cavity 43 from the through hole 422. Since the movable plate 421 is concave in the center, the extrusion direction of the conductive paste is toward the center of the movable plate 421, that is, the position of the contact head 411. The conductive paste is effectively coupled with the uneven wall surface by extrusion, and at the same time covers the contact head 411, so that the contact head 411 can effectively and evenly contact the uneven wall surface, thereby improving the conductive efficiency. Compared with using a wet sponge as a coupling intermediate, the liquid conductive paste can more easily cover the irregular and rough damaged inner surface of the concrete wall after being squeezed out, thereby improving the conductive effect.

[0049] Secondly, since there are multiple groups of contact rods 425, when several contact rods 425 contact an irregular concrete surface, different contact rods 425 will inevitably be pushed forward at different distances. Therefore, several independently arranged contact rods 425 can more flexibly adapt to the uneven concrete surface, and since there are also multiple groups of springs A426, according to the different pushing distances of different contact rods 425, the pushed movable plate 421 will also be tilted to an angle that is more suitable for the concrete surface due to the pushing distance, thereby facilitating the conductive paste to adapt and fit the irregular concrete surface more evenly and accurately, reducing unnecessary waste, and improving the conductive efficiency to a certain extent.

[0050] Furthermore, a retaining ring A423 and a retaining ring B424 are fixedly connected on both sides of the movable plate 421, and the retaining ring A423 and the retaining ring B424 are both soft sealing gaskets, such as silicone or rubber gaskets. By respectively arranging the retaining ring A423 and the retaining ring B424 on both sides of the movable plate 421, the conductive paste is prevented from entering the annular groove and affecting the movement of the movable plate 421. In addition, gaskets made of materials such as silicone or rubber have low adhesion to the conductive paste, thereby preventing the conductive paste from sticking.

[0051] Furthermore, in the present embodiment, an extrusion assembly is also included, which includes an active chamber 431 and a ventilation chamber 432 which are provided in the extension rod 4. One end of the ventilation chamber 432 is connected to the active chamber 431, and the other end is connected to the external air, so as to ensure that the active chamber 431 maintains a balance with the external air pressure. One end of the active chamber 431 is connected to the interior of the storage chamber 43. A movable rod 433 is slidably connected in the active chamber 431, and an extrusion block 434 is fixedly connected to one end of the movable rod 433. The size of the extrusion block 434 is comparable to the size of the inner wall of the storage chamber 43. By pushing the extrusion block 434 toward the movable plate 421, the conductive paste in the storage chamber 43 can be easily squeezed out. A push rod 427 is movably connected to one side of the movable plate 421 close to the extrusion block 434. The universal ball shaft of the push rod 427 is connected to the movable plate On one side of 421, one end of the push rod 427 passes through the extrusion block 434 and the movable rod 433 respectively, and extends to the inner wall of the movable rod 433. A gear 435 is arranged inside the movable rod 433, and an adjustment hole 436 adapted to the gear 435 is opened on the surface of the movable rod 433. Connecting shafts are arranged at both ends of the gear 435. One end of the connecting shaft passes through the adjustment hole 436 and is rotatably connected to the inner wall of the movable cavity 431. A rack is fixedly connected to one end of the push rod 427 located inside the movable rod 433, and the rack is meshed with the gear 435. A plurality of tooth grooves adapted to the gear 435 are opened on the inner wall of the movable rod 433, and the gear 435 is also meshed with the tooth grooves. Subsequently, a feed hole connected to the storage cavity 43 can be opened on the surface of the extension rod 4, and conductive paste is added through the feed hole, and the feed hole can be tightly fixed by a sealing plug.

[0052] Specifically, when the movable plate 421 is pushed by the contact rod 425 to move toward the side of the extrusion block 434, the push rod 427 will be pushed synchronously to push it toward the inside of the movable rod 433. The rack on the surface of the push rod 427 drives the gear 435 meshing with it to rotate. The rotation of the gear 435 cooperates with the tooth groove to move the movable rod 433 in the opposite direction of the movement direction of the push rod 427, that is, the movable rod 433 pushes the extrusion block 434 to move toward the movable plate 421, so as to facilitate the conductive paste in the storage cavity 43 to be squeezed out from the through hole 422. After the spring A426 returns to the center and pushes the movable plate 421 to return to the center, the movable rod 433 pulls back the extrusion block 434 under the cooperation of the rack, gear 435 and tooth groove to return it. During this period, the ventilation cavity 432 is used to maintain the internal and external air pressure balance during the movement of the extrusion block 434 to prevent the extrusion block 434 from being unable to move.

[0053] See also Fig. 9 As shown, in this embodiment, the steel bar clamp 3 includes two mutually hinged jaws, and an arc block 32 is provided on the side where the two jaws are close to each other. Arc grooves are provided on both sides of the arc block 32. The jaws are connected to the arc grooves through a connecting rod 33. The connecting rod 33 is fixed to the inner wall of the jaws and slides in the arc groove, and the signal line B31 is directly connected to the arc block 32. The arc block 32 is set to a metal conductive material, and its surface is provided with a groove for stably clamping on the surface of the steel bar.

[0054] Specifically, due to the coordination between the extension rod 4 and the bracket 12, during the adjustment and switching process of the two, the clamping stability of the steel bar clamp 3 on the steel bar will be affected by line adjustment, winding, etc. Therefore, an arc block 32 is provided on the clamping jaws on the surface of the steel bar clamp 3, and the arc block 32 contacts and clamps the surface of the steel bar. In this way, when the line moves, the steel bar clamp 3 moves, and then the clamping jaws slide on the surface of the arc block 32 through the connecting rod 33. The movement of the clamping jaws offsets the shaking caused by the line movement, thereby ensuring that the arc block 32 is stably clamped on the surface of the steel bar.

[0055] See also Fig.10 As shown, in this embodiment, two card slots 14 adapted to the electrode rod 2 are provided on one side of the bracket 12 away from the positioning sleeve 15, and the card slots 14 are used to connect the electrode rod 2. A threaded groove can be provided in the card slot 14, and the electrode rod 2 is tightened by the thread. Since there are two card slots 14, two groups of electrode rods 2 are connected through the bracket 12, and then the double electrode point detection on the wall is performed, which further improves the detection accuracy and the diversity of use of the device.

[0056] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation mode. The above-mentioned specific implementation mode is merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make more forms of equivalent embodiments, all of which are within the protection of this embodiment.

Claims

1. A steel bar corrosion monitoring device in a reinforced concrete structure, comprising a monitoring host (1), an electrode rod (2) and a steel bar clamp (3), wherein a sponge block (22) is provided at one end of the electrode rod (2), the electrode rod (2) is connected to the monitoring host (1) via a signal line A (21), and the steel bar clamp (3) is connected to the monitoring host (1) via a signal line B (31), characterized in that: Also includes: A bracket (12), the bracket (12) being connected to the monitoring host (1) via a connecting block (11), and a positioning sleeve (15) for binding the electrode rod (2) being slidably provided on the surface of the bracket (12); A connection component is arranged on one side of the bracket (12), the connection component comprises an extension rod (4) which is inserted through the surface of the bracket (12), a conductive member is arranged on the surface of the extension rod (4), and a connecting component for connecting the electrode rod (2) with the conductive member is installed on the surface of the bracket (12); when the bracket (12) is attached to a flat concrete wall, the extension rod (4) can slide on the surface of the bracket (12) and extend into the recessed interior of the wall; Also included is a contact assembly for improving the degree of coupling between the conductive member and the recessed portion of the wall surface; The conductive member comprises a plurality of conductive sheets (41), the plurality of conductive sheets (41) being laid on the surface of the extension rod (4) in a direction parallel to the axis of the extension rod (4), and a resistor block (412) being abutted between adjacent conductive sheets (41), a contact head (411) being provided at one end of the conductive sheet (41), the contact head (411) being parallel to a plane of one end of the extension rod (4) after being bent, and a pressing plate (44) abutting against an end of the conductive sheet (41) away from the contact head (411), the pressing plate (44) being connected to the extension rod (4) via a spring B (441); The connecting component comprises a connection block (414), a connection hole is provided on a side of the surface of the bracket (12) close to the extension rod (4), the connection block (414) is fixedly connected to the inner wall of the connection hole, and a slide groove (413) is provided inside the extension rod (4), the connection block (414) slides in the slide groove (413), one end of the slide groove (413) located inside the extension rod (4) is connected to the bottom of the conductive sheet (41), the connection block (414) is connected to the conductive sheet (41) through a connecting piece (415), a stopper (13) is hingedly connected to the inner wall of the connection hole, and a connection guide block (131) is fixedly connected to the hinge axis of the stopper (13) and the inner wall of the connection hole, and when the stopper (13) rotates to a right-angled cross state with the bracket (12), the connection guide block (131) contacts the connection block (414); The contact assembly comprises a movable plate (421), a surface of the movable plate (421) is provided with a plurality of through holes (422), an end of the extension rod (4) close to the contact head (411) is provided with a contact cavity (42) and a storage cavity (43), the contact head (411) is located in the contact cavity (42), an inner wall of the extension rod (4) is provided with an annular groove close to the contact cavity (42) and between the storage cavity (43), the movable plate (421) slides in the annular groove, and the movable plate (421) is connected to the inner wall of the annular groove via a plurality of springs A (426), a plurality of contact rods (425) are passed through the extension rod (4), and the contact rods (425) are in contact with the movable plate (421).

2. The steel bar corrosion monitoring device in a reinforced concrete structure according to claim 1, characterized in that: The connecting piece (415) is a conductive slider or a conductive brush.

3. The steel bar corrosion monitoring device in a reinforced concrete structure according to claim 1, characterized in that: A retaining ring A (423) and a retaining ring B (424) are respectively fixedly connected to both sides of the movable plate (421); the retaining ring A (423) and the retaining ring B (424) are both soft sealing gaskets.

4. The device for monitoring steel corrosion in a reinforced concrete structure according to claim 3, characterized in that: The extrusion assembly also includes an active cavity (431) and a ventilation cavity (432) which are opened in the extension rod (4); one end of the ventilation cavity (432) is connected to the active cavity (431) and the other end is connected to the external air; one end of the active cavity (431) is connected to the inside of the storage cavity (43); a movable rod (433) is slidably connected in the active cavity (431); one end of the movable rod (433) is fixedly connected to an extrusion block (434); the size of the extrusion block (434) is comparable to the size of the inner wall of the storage cavity (43); a push rod (427) is movably connected to a side of the movable plate (421) close to the extrusion block (434); the push rod (427) One end of the push rod (427) passes through the extrusion block (434) and the movable rod (433) respectively, and extends to the inner wall of the movable rod (433); a gear (435) is arranged inside the movable rod (433), and an adjustment hole (436) adapted to the gear (435) is opened on the surface of the movable rod (433); connecting shafts are arranged at both ends of the gear (435); one end of the connecting shaft passes through the adjustment hole (436) and is rotatably connected to the inner wall of the movable cavity (431); one end of the push rod (427) located inside the movable rod (433) is fixedly connected to a rack, and the rack meshes with the gear (435); and a plurality of tooth grooves adapted to the gear (435) are opened on the inner wall of the movable rod (433).

5. The steel bar corrosion monitoring device in a reinforced concrete structure according to claim 1, characterized in that: The steel bar clamp (3) comprises two clamping jaws hinged to each other, and an arc block (32) is provided on one side of the two clamping jaws close to each other. Arc grooves are provided on both sides of the arc block (32), and the clamping jaws are connected to the arc grooves via a connecting rod (33).

6. The steel bar corrosion monitoring device in a reinforced concrete structure according to claim 1, characterized in that: Two slots (14) adapted to the electrode rods (2) are provided on a side of the bracket (12) away from the positioning sleeve (15).

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