Steel bar protective layer thickness detection device

Abstract

The utility model belongs to the technical field of reinforcing steel bar protective layer detection, discloses a reinforcing steel bar protective layer thickness detection device, and aims to solve the problems of low detection efficiency and poor detection precision when a worker detects a reinforcing steel bar protective layer by means of an escalator and holding a reinforcing steel bar scanner by hand. The device comprises a base, the two first supporting seats are provided with sliding rods, and the sliding rods are provided with sliding blocks; a spliced lead screw is arranged in the spliced guide rod in a sleeving manner, and a moving block in threaded connection with the lead screw is arranged on the lead screw in a sleeving manner; one end of the moving block extends out of the strip-shaped seam and is connected with an inserting part used for being inserted into a handle of the steel bar scanner. And the driving motor is used for driving the lead screw to rotate so as to drive the moving block to move up and down on the lead screw. According to the utility model, a worker does not need to climb with the help of an escalator for detection, so that the labor intensity of the worker can be greatly reduced while the detection efficiency is improved, and the potential safety hazard caused by climbing the escalator is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar protection layer detection, and in particular relates to a steel bar protection layer thickness detection device. Background Art

[0002] During the construction process, it is necessary to pour concrete on the steel skeleton (such as the steel skeleton in columns, walls, beams, and bridge piers) so that the steel skeleton and concrete form a whole. In order to protect the steel bars and prevent (or reduce) the corrosion of the steel bars, there are certain requirements for the thickness between the outermost side of the steel bars and the outer surface of the concrete, that is, the thickness of the steel bar protective layer has requirements and specifications. The following table shows the minimum thickness of the concrete protective layer (mm):

[0003] Environmental category Plate, wall, shell Beams, columns, rods one 15 20 Two a 20 25 2b 25 35 Three A 30 40 Three B 40 50

[0004] Among them, when the concrete strength is not greater than C25, the protective layer thickness value in the table should be increased by 5mm; reinforced concrete foundations should be provided with concrete cushions, and the thickness of the concrete protective layer of the steel bars in the foundation should be calculated from the top surface of the cushion and should not be less than 40mm. Therefore, those skilled in the art can understand and comprehend the thickness of the steel bar protective layer.

[0005] At present, steel bar scanners (such as Figure 1 During the specific operation, the staff needs to slide the steel bar scanner on the columns and walls to detect the thickness of the steel bar protective layer.

[0006] However, in actual operation, the height of columns and walls of ordinary buildings is generally 3m or more, so the staff have to operate with the help of escalators. Because the entire height direction of the columns and walls needs to be detected during scanning, and for the wall surface, multiple positions need to be scanned along the width direction of the wall surface. Therefore, the up and down movement detection of the staff holding the rebar scanner on the escalator not only leads to low detection efficiency; at the same time, because the staff's hands will inevitably shake when climbing up and down the escalator (for example, the rebar scanner is tilted, causing one end to contact the concrete surface while the other end does not contact the concrete surface), which affects the detection accuracy.

[0007] In addition, the process of workers climbing up and down the escalator is not only labor-intensive but also involves certain safety hazards. Utility Model Content

[0008] In order to solve the problems of low detection efficiency and poor detection accuracy when workers use a ladder and a handheld steel bar scanner to detect the protective layer of steel bars, the utility model provides a steel bar protective layer thickness detection device, by means of which the steel bar protective layer thickness can be detected, and the workers do not need to climb the escalator for detection. While improving the detection efficiency, the labor intensity of the workers can be greatly reduced, and the safety hazards caused by climbing the escalator can be avoided.

[0009] In order to solve the technical problem, the technical solution adopted by the utility model is:

[0010] A device for detecting the thickness of a steel bar protective layer, characterized by comprising:

[0011] The base is used to support the entire detection device.

[0012] Two first support seats, wherein the first support seats are arranged on the base along the width direction of the base, the first support seats are provided with a sliding rod, and the sliding rod is provided with a sliding block;

[0013] A spliced ​​guide rod, the spliced ​​guide rod is a hollow structure, a spliced ​​lead screw is sleeved inside the spliced ​​guide rod, a moving block is sleeved on the lead screw and is threadedly connected to the lead screw; a strip slit is opened on the side of the spliced ​​guide rod, one end of the moving block extends out of the strip slit and is connected to a plug-in portion for inserting a handle of a steel bar scanner;

[0014] The driving motor is installed on the sliding block and is used to drive the lead screw to rotate and then drive the moving block to move up and down on the lead screw.

[0015] In some embodiments, the longitudinal cross-section of the sliding rod is rectangular, T-shaped or wedge-shaped, and the sliding block is provided with a sliding groove that matches the sliding rod.

[0016] In some embodiments, at least two screw holes are formed on the sliding block, and the screw holes are provided with locking screws, and the position of the sliding block on the sliding rod is locked on the sliding rod by the locking screws.

[0017] In some embodiments, the base is also provided with two second support seats, the spacing between the second support seats is smaller than the spacing between the two first support seats, the two second support seats are provided with a sliding rod, and the left and right ends of the sliding rod located on the outside of the second support seat are provided with sliding blocks, and the sliding block is detachably connected to a reinforcing rod, and the other end of the reinforcing rod is detachably connected to the outside of the splicing guide rod.

[0018] In some embodiments, the spliced ​​guide rod includes a bottom guide rod, a middle guide rod and a top guide rod, and bearings are installed at the bottom of the bottom guide rod and the top of the top guide rod, and a spliced ​​lead screw is sleeved in the bearing.

[0019] In some embodiments, a mounting hole with a rectangular cross-section is opened in the sliding block along the vertical direction, a mounting plate is arranged on the periphery of the lower section of the bottom guide rod, and the bottom guide rod is inserted into the mounting hole and fastened to the sliding block through the mounting plate.

[0020] In some embodiments, a driven bevel gear is installed at the bottom of the mounting hole via a bearing, a second mounting hole connected to the mounting hole is opened on the side of the sliding block facing the second support seat, and an active bevel gear is installed on the output shaft of the drive motor. The active bevel gear extends into the second mounting hole and meshes with the driven bevel gear.

[0021] In some embodiments, the moving block extending from the spliced ​​guide rod forms an installation cavity, a servo motor and a bearing are installed in the installation cavity, a rotating plate is sleeved on the bearing, one end of the rotating plate is sleeved in the bearing and fixedly connected to the output shaft of the servo motor, and the plug-in portion is installed on the side of the rotating plate away from the spliced ​​guide rod.

[0022] In some embodiments, the plug-in portion is mounted on the rotating plate via a pin shaft.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] During the use of the steel bar protective layer thickness detection device of the utility model, firstly, the spliced ​​guide rod is inserted and fastened to the sliding block, and the steel bar scanner is inserted and fastened to the plug-in part, and then the spliced ​​guide rod is connected to the slider by using the reinforcing rod. Then the whole device is pushed so that the steel bar scanner on the plug-in part contacts the concrete surface of the column and the wall; then the sliding block is pushed to move left and right on the sliding rod, thereby driving the steel bar scanner to move the concrete surface in the horizontal direction, and then scanning different positions at the same height position; when it is necessary to scan different height positions, then the driving motor is started to drive the lead screw to rotate, and then the moving block is driven to move up and down on the lead screw, and finally the steel bar scanner is driven to scan the column and the wall to obtain the thickness information of the steel bar protective layer. When it is necessary to scan the top position of the column and the wall, the servo motor is first used to drive the rotating plate to rotate 90°, and the plug-in part itself can rotate on the rotating plate, thereby making the vertical state of the steel bar scanner unchanged, and the rotating plate can be extended to realize scanning the top position of the column and the wall. In the actual operation process, it is generally necessary to scan the width of 6 to 7 steel bars at the same height position. During the use of the utility model, when scanning at one height position is completed, the driving motor drives the moving block to move up and down on the lead screw to reach another height position for scanning. When scanning different areas of the wall, the entire device can be pushed to move to the next scanning area, and the cycle is repeated to complete the scanning detection of the thickness of the steel bar protective layer.

[0025] Compared with the prior art, the utility model adopts the method of workers climbing escalators, which can improve the efficiency of protective layer thickness detection, and also avoids the problems of low detection accuracy and safety hazards caused by shaking during climbing escalators.

[0026] In addition, the present invention adopts a splicing structure, which can be spliced ​​according to the actual height during use. After use, it can be disassembled, which is convenient for handling and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of an existing steel bar scanner;

[0028] Figure 2 This is a schematic diagram of the structure of an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the bottom guide rod of the utility model when it is spliced ​​on the base;

[0030] Figure 4 for Figure 3 A schematic diagram of a partial enlarged view of the middle A part;

[0031] Figure 5It is a structural schematic diagram of the sliding block of the utility model;

[0032] Figure 6 This is a schematic diagram of the connection between the lead screw and the drive motor of the utility model;

[0033] Figure 7 It is a schematic diagram of the connection between the moving block and the rotating plate of the utility model;

[0034] Figure 8 This is a schematic diagram of the connection between the spliced ​​guide rods of the utility model, and shows a schematic diagram of the structure of the bottom guide rod and the middle guide rod being spliced ​​with each other;

[0035] Markings in the figure: 1. base, 2. first support seat, 3. sliding rod, 4. sliding block, 41. sliding groove, 42. mounting hole, 43. second mounting hole, 44. screw hole, 5. spliced ​​guide rod, 51. bottom guide rod, 52. middle guide rod, 53. top guide rod, 54. strip seam, 55. locking screw, 56. mounting plate, 6. second support seat, 7. sliding rod, 8. slider, 9. reinforcing rod, 10. driving motor, 101. driven bevel gear, 102. driving bevel gear, 11. lead screw, 111. female head, 12. moving block, 121. mounting cavity, 13. servo motor, 15. plug-in part, 151. plug-in groove, 152. locking screw hole. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the embodiments, which are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the protection scope of the present invention.

[0037] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In conjunction with the accompanying drawings, the steel bar protective layer thickness detection device of the utility model includes:

[0039] Base 1, used to support the entire detection device;

[0040] Two first support seats 2, wherein the first support seats 2 are arranged on the base 2 along the width direction of the base 1, a sliding rod 3 is provided on the first support seat 2, and a sliding block 4 is provided on the sliding rod 3;

[0041] A spliced ​​guide rod 5, which is a hollow structure, is sleeved with a spliced ​​lead screw 11 inside the spliced ​​guide rod 5, and a moving block 12 is sleeved on the lead screw 11 and is threadedly connected to the lead screw; a strip slit 54 is opened on the side of the spliced ​​guide rod 5, and one end of the moving block 12 extends out of the strip slit 54 and is connected to a plug-in portion 15 for inserting a handle of a steel bar scanner;

[0042] The driving motor 10 is mounted on the sliding block 4 and is used to drive the lead screw 11 to rotate and then drive the moving block 12 to move up and down on the lead screw 11 .

[0043] In the specific implementation process, a universal wheel is installed at the lower end of the base 1 to facilitate transportation; at the same time, an adjusting screw is provided on the four corners of the base, and the lower end of the adjusting screw passes through the base and is connected to a support plate, so that the position of the support plate is adjusted by the adjusting screw, and the support plate is used to stabilize the entire device on the ground.

[0044] In some embodiments, the longitudinal cross-section of the sliding rod 3 is rectangular, T-shaped or wedge-shaped, and the sliding block 4 is provided with a sliding groove 41 that matches the sliding rod 3. Thus, the sliding block 4 is directly positioned by using the rectangular, T-shaped or wedge-shaped sliding rod 3 to prevent the sliding block 4 from rotating on the sliding rod 3. In the specific implementation process, the first support seat 2 is also provided with a sliding groove that matches the sliding rod 3.

[0045] In some embodiments, at least two screw holes 44 are formed on the sliding block 4 , and the screw holes 44 are equipped with locking screws. The position of the sliding block 4 on the sliding rod 3 is locked on the sliding rod 3 by the locking screws.

[0046] In some embodiments, the base is further provided with two second support seats 6, the spacing between the second support seats 6 is smaller than the spacing between the two first support seats 2, the two second support seats 6 are sleeved with a slide bar 7, and the left and right ends of the slide bar 7 located outside the second support seat 6 are sleeved with a slider 8, and the slider 8 is detachably connected with a reinforcing rod 9, and the other end of the reinforcing rod 9 is detachably connected to the outside of the spliced ​​guide rod 5. That is to say, the reinforcing rod 9 is used to stabilize the spliced ​​guide rod 5, improve the stability of the spliced ​​guide rod 5, and prevent the spliced ​​guide rod 5 from tilting and collapsing. And the structural design of the slide bar and the slider makes it possible for the reinforcing rod 9 to drive the slider 8 to slide on the slide bar 7 when the sliding block 4 slides on the sliding rod 3, so that no matter how the left and right positions of the sliding block 4 on the sliding rod 3 change, the reinforcing rod 9 and the slider 8 can move synchronously, thereby ensuring the stability of the spliced ​​guide rod 5.

[0047] When the sliding block 4 is fastened to the sliding rod 3 by the fastening bolts, there will be no relative movement between the slider 8 and the sliding rod 7. Therefore, there is no specific restriction on the cross-sectional shape of the sliding rod 7, and circular, rectangular, wedge-shaped, and T-shaped sliding rods are all acceptable.

[0048] In some embodiments, a linear motor is also arranged on the base 1, which is used to drive the sliding block 4 to move on the sliding rod 3, thereby driving the steel bar scanner installed on the moving block to move left and right for scanning, so as to obtain the thickness information of the steel bar protective layer.

[0049] In some embodiments, the spliced ​​guide rod 5 includes a bottom guide rod 51, an intermediate guide rod 52 and a top guide rod 53. The bottom of the bottom guide rod 51 and the top of the top guide rod 52 are both installed with bearings 55, and the bearings 55 are sleeved with a spliced ​​lead screw 11. In the specific implementation project, the bottom guide rod 51 (with a lead screw sleeved inside through the bearing 55) is first fastened to the sliding block 4, and then the middle guide rod 52 is spliced ​​section by section, and finally the top guide rod 52 (with a lead screw sleeved inside through the bearing) is spliced ​​to complete the splicing of the entire spliced ​​guide rod 5. Among them, when splicing the intermediate guide rod, the internal lead screw is spliced ​​first, and then the external guide rod is spliced.

[0050] In the specific implementation process, the spliced ​​guide rods 5 are plugged in by the matching mode of male and female heads, and then locked by the locking screw 55 and the matching locking nut, so as to firmly connect the adjacent spliced ​​guide rods 5. Among them, the position of the locking screw 55 should not block and hinder the lead screw 11 and the moving block 12. In the specific process, the locking screw is arranged on the spliced ​​guide rod 5 outside the lead screw and the moving block in a direction parallel to the strip seam.

[0051] Among them, since the weight of the steel bar scanner itself is relatively light (no more than 2 kg), the strength requirement for the lead screw 11 is not very high. Therefore, in order to reduce the manufacturing cost, the lead screw 11 and the moving block 12 can be made of plastic, and the spliced ​​guide rod can be made of aluminum alloy, thereby reducing the weight of the entire device and facilitating transportation.

[0052] In some embodiments, a mounting hole 42 with a rectangular cross section is provided in the sliding block 4 along the vertical direction, and a mounting plate 56 is provided on the periphery of the lower section of the bottom guide rod 51. The bottom guide rod 51 is inserted into the mounting hole 42 and is fastened to the sliding block 4 through the mounting plate 56. Among them, a plurality of through holes are provided on the mounting plate 56, and a threaded hole is provided on the sliding block outside the mounting hole 42, and the mounting plate 56 is threadedly connected to the sliding block 4 through a provided screw.

[0053] In some embodiments, a driven bevel gear 102 is installed at the bottom of the mounting hole 42 via a bearing, a second mounting hole 43 is provided on the side of the sliding block 4 facing the second support seat 6 and is interconnected with the mounting hole 42, and an active bevel gear 101 is installed on the output shaft of the driving motor 10, and the active bevel gear 101 extends into the second mounting hole 43 and meshes with the driven bevel gear 102. In the specific implementation process, the purpose of the utility model to install the driving motor on the side of the sliding block facing the second support seat is to drive the lead screw to rotate through the mutual meshing of the active bevel gear and the driven bevel gear, and at the same time, to counterweight the entire device by using the weight of the driving motor to ensure the stability of the entire device when in use.

[0054] In the specific implementation process, the lower section of the lead screw 11 in the bottom guide rod 51 has a male head with a rectangular cross section, and the male head extends out of the bottom guide rod 51, and a slot that matches the male head is opened in the middle of the driven bevel gear 102, so that when the male head in the bottom guide rod 51 is inserted into the slot of the driven bevel gear 102, the driven bevel gear 102 moves, which can drive the lead screw 11 to rotate, and then drive the moving block 12 to move up and down. Among them, the lead screw also adopts a spliced ​​structure, and adjacent lead screws are plugged into each other through male heads and female heads 111.

[0055] There should be no mechanical interference between the sliding groove on the sliding block 4 and the driving bevel gear 101 and the driven bevel gear 102 , which can be understood by those skilled in the art and will not be described in detail here.

[0056] Preferably, a locking pin hole is provided in the female head 111 of the lead screw 11 , and an elastic locking pin is provided in the male head, thereby improving the stability of the connection between adjacent lead screws 11 .

[0057] In some embodiments, the moving block 12 extending from the spliced ​​guide rod 5 is formed with an installation cavity 121, in which a servo motor 13 and a bearing are installed, and a rotating plate 14 is sleeved on the bearing, one end of the rotating plate 14 is sleeved in the bearing and fixedly connected to the output shaft of the servo motor 13, and the plug-in portion 15 is installed on the rotating plate 1 at a side away from the spliced ​​guide rod 5. The servo motor 13 can be a small servo motor, and since the moving block, the rotating plate, the plug-in portion, and the steel bar scanner itself are relatively light in weight, a small servo motor can be used to drive the rotating plate to rotate.

[0058] The moving block is provided with a threading hole for passing the wire of the servo motor 13. In order to prevent the wire of the servo motor 13 from being entangled during use, the wire is led out of the moving block 12 and then clamped on the spliced ​​guide rod 5 by a buckle.

[0059] The length of the rotating plate 14 can be set according to actual conditions so that the steel bar scanner on the plug-in portion 15 can scan the root of the column wall. That is to say, when the moving block is at the lowest position on the lead screw, the steel bar scanner on the plug-in portion 15 can scan the root of the column wall.

[0060] The utility model can eliminate the height influence caused by the base, the first support seat, the sliding block, etc. by the rotating plate, and then use the rotating plate to extend downward so as to use the steel bar scanner to scan the root of the column and the wall. When it is necessary to scan the top of the column and the wall, the servo motor can be used to drive the rotating plate to rotate.

[0061] In some embodiments, the plug-in portion 15 is mounted on the rotating plate 14 via a pin shaft. Thus, when the rotating plate rotates, the steel bar scanner always maintains a vertical state under the action of its own weight and does not flip.

[0062] In the specific implementation process, the plug-in part 15 has a plug-in groove 151 that matches the handle of the existing rebar scanner, so that the handle can be directly plugged into the plug-in groove 151. The plug-in part 15 also has at least two locking screw holes 152, and the locking screw holes 152 are equipped with locking screws, so that the handle of the rebar scanner is secured on the plug-in part 15 by utilizing the locking screw mechanism.

[0063] During the use of the steel bar protective layer thickness detection device of the utility model, firstly, the spliced ​​guide rod is inserted and fastened to the sliding block, and the steel bar scanner is inserted and fastened to the plug-in part, and then the spliced ​​guide rod is connected to the slider by using the reinforcing rod. Then the whole device is pushed so that the steel bar scanner on the plug-in part contacts the concrete surface of the column and the wall; then the sliding block is pushed to move left and right on the sliding rod, thereby driving the steel bar scanner to move the concrete surface in the horizontal direction, and then scanning different positions at the same height position; when it is necessary to scan different height positions, then the driving motor is started to drive the lead screw to rotate, and then the moving block is driven to move up and down on the lead screw, and finally the steel bar scanner is driven to scan the column and the wall to obtain the thickness information of the steel bar protective layer. When it is necessary to scan the top position of the column and the wall, the servo motor is first used to drive the rotating plate to rotate 90°, and the plug-in part itself can rotate on the rotating plate, thereby making the vertical state of the steel bar scanner unchanged, and the rotating plate can be extended to realize scanning the top position of the column and the wall. In the actual operation process, it is generally necessary to scan the width of 6 to 7 steel bars at the same height position. During the use of the utility model, when scanning at one height position is completed, the driving motor drives the moving block to move up and down on the lead screw to reach another height position for scanning. When scanning different areas of the wall, the entire device can be pushed to move to the next scanning area, and the cycle is repeated to complete the scanning detection of the thickness of the steel bar protective layer.

[0064] Compared with the prior art, the utility model adopts the method of workers climbing escalators, which can improve the efficiency of protective layer thickness detection and also avoid potential safety hazards in the process of climbing escalators.

[0065] In addition, the utility model adopts a splicing structure, which can be spliced ​​when in use and can be disassembled after use, thereby facilitating handling and transportation.

Claims

1. A device for detecting the thickness of a steel bar protective layer, characterized in that: include: It comprises a base (1) for supporting the entire detection device. Two first support seats (2), the first support seats (2) being arranged on the base (1) along the width direction of the base (1), the first support seats (2) being provided with a sliding rod (3), and the sliding rod (3) being provided with a sliding block (4); A spliced ​​guide rod (5), the spliced ​​guide rod (5) being a hollow structure, the interior of the spliced ​​guide rod (5) being sleeved with a spliced ​​lead screw (11), the lead screw (11) being sleeved with a moving block (12) threadedly connected to the lead screw; a strip-shaped slit (54) is provided on the side of the spliced ​​guide rod (5), one end of the moving block (12) extending out of the strip-shaped slit (54) and connected to a plug-in portion (15) for inserting a handle of a steel bar scanner; The driving motor (10) is mounted on the sliding block (4) and is used to drive the lead screw (11) to rotate and then drive the moving block (12) to move up and down on the lead screw (11).

2. The steel bar protective layer thickness detection device according to claim 1 is characterized in that: The longitudinal cross section of the sliding rod (3) is rectangular, T-shaped or wedge-shaped, and the sliding block (4) is provided with a sliding groove (41) that matches the sliding rod.

3. The steel bar protective layer thickness detection device according to claim 2 is characterized in that: The sliding block (4) is provided with at least two screw holes (44), and the screw holes (44) are provided with locking screws. The position of the sliding block (4) on the sliding rod (3) is locked on the sliding rod through the locking screws.

4. The steel bar protective layer thickness detection device according to any one of claims 1 to 3, characterized in that: The base (1) is also provided with two second support seats (6), the spacing between the second support seats (6) is smaller than the spacing between the two first support seats (2), the two second support seats (6) are sleeved with a sliding rod (7), and the left and right ends of the sliding rod (7) located outside the second support seat (6) are sleeved with sliding blocks (8), the sliding block (8) is detachably connected to a reinforcing rod (9), and the other end of the reinforcing rod (9) is detachably connected to the outside of the spliced ​​guide rod (5).

5. The steel bar protective layer thickness detection device according to claim 4 is characterized in that: The spliced ​​guide rod (5) comprises a bottom guide rod (51), an intermediate guide rod (52) and a top guide rod (53); the bottom of the bottom guide rod (51) and the top of the top guide rod are both provided with bearings (55); and the spliced ​​lead screw (11) is sleeved in the bearing (55).

6. The steel bar protective layer thickness detection device according to claim 5, characterized in that: A mounting hole (42) with a rectangular cross section is provided in the sliding block (4) along the vertical direction, and a mounting plate (56) is provided on the periphery of the lower section of the bottom guide rod (51). The bottom guide rod (51) is inserted into the mounting hole (42) and is fastened to the sliding block (4) through the mounting plate (56).

7. The steel bar protective layer thickness detection device according to claim 6 is characterized in that: A driven bevel gear (102) is mounted at the bottom of the mounting hole (42) via a bearing, a second mounting hole (43) is provided on the side of the sliding block (4) facing the second support seat (6) and is communicated with the mounting hole (42), an active bevel gear (101) is mounted on the output shaft of the driving motor (10), and the active bevel gear (101) extends into the second mounting hole (43) and meshes with the driven bevel gear (102).

8. The steel bar protective layer thickness detection device according to claim 1, characterized in that: The moving block (12) extending from the spliced ​​guide rod (5) is formed with an installation cavity (121), in which a servo motor (13) and a bearing are installed, a rotating plate (14) is sleeved on the bearing, one end of the rotating plate (14) is sleeved in the bearing and fixedly connected to the output shaft of the servo motor (13), and the plug-in portion (15) is installed on the rotating plate (14) at a side away from the spliced ​​guide rod (5).

9. The steel bar protective layer thickness detection device according to claim 8, characterized in that: The plug-in portion (15) is mounted on the rotating plate (14) via a pin shaft.

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