Tightness detection equipment for tunnel primary support steel arch connecting plate

Abstract

The invention, which relates to the technical field of tunnel engineering construction detection, discloses a tunnel primary support steel arch connecting plate fitting degree detection device comprising a steel arch, a connecting plate arranged at the connecting end of the steel arch, and a detection frame used for connecting plate fitting degree detection. The detection frame comprises a clamping frame, a ball screw, a detection assembly arranged on the surface of the ball screw and a soot blowing assembly arranged on one side of the clamping frame, and according to the tunnel primary support steel arch connecting plate tightness detection equipment, the U-shaped clamping frame is matched with the hand-twisted screw and the like, so that the connecting plate is conveniently and rapidly fixed, and the position of the laser scanner does not need to be repeatedly adjusted; meanwhile, automatic scanning detection of a laser scanner along a ball screw and synchronous cleaning of a cleaning brush ring are achieved through driving of a second servo motor, so that the detection efficiency and accuracy are improved, dust is blown away in time through a dust blowing assembly during detection, secondary pollution is avoided, and it is further ensured that detection is stable and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel engineering construction detection, in particular to a kind of tunnel primary support steel arch connecting plate close degree detection equipment. BACKGROUND

[0002] Tunnel primary support steel arch is made of section steel or grid steel frame in tunnel engineering, and is immediately constructed after excavation to provide early support and maintain the stability of surrounding rock. Tunnel primary support steel arch connecting plate is a key stressed component for connecting adjacent steel arch segments in the initial support system of tunnel engineering. It is usually a steel plate with bolt holes, which connects adjacent arches tightly through high-strength bolts to form an integrated support structure. Its core function is to ensure effective force transmission between steel arches and jointly bear the pressure of surrounding rock.

[0003] The close degree of tunnel primary support steel arch connecting plate refers to the tightness of the actual contact between the connecting surfaces of two adjacent connecting plates after the high-strength bolts are tightened. Its value is represented by parameters such as gap size and contact area, and directly determines whether the connecting node can achieve effective force transmission and ensure the overall stability of the support system. Therefore, it needs to be detected by detection equipment after installation. The existing tunnel primary support steel arch connecting plate is detected by half plug gauge after connection, which is not only inefficient, but also prone to gap reading deviation due to differences in manual operation (such as insertion force and angle), making it difficult to ensure the accuracy of detection. Some use laser scanners for detection, but the connecting plates at the connecting points of tunnel primary support steel arches generally have a moving angle. When using a laser scanner, the scanner mounting position and lens angle need to be adjusted repeatedly to accurately align the gap, which is time-consuming and labor-intensive, resulting in low detection efficiency. Moreover, there is a lot of dust during tunnel construction, which makes the connecting plate surface adhere to a lot of dust. Dust can affect the accuracy of measurement during detection, reducing the detection effect. SUMMARY

[0004] The purpose of the present application is to provide a tunnel primary support steel arch connecting plate close degree detection equipment to solve the problem of low efficiency and poor accuracy caused by manual operation differences in the existing tunnel primary support steel arch connecting plate close degree detection using plug gauge. Some laser scanning detection requires repeated adjustment of equipment position and lens angle due to the angle of connecting plate, resulting in low efficiency. Moreover, the dusty environment of tunnel construction also affects the accuracy of detection.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a tunnel primary support steel arch connecting plate close contact degree detection equipment, comprising a steel arch, a connecting plate arranged at the connecting position of both ends of the steel arch, and a detection frame for connecting plate close contact degree detection; the detection frame comprises a clamping frame in a "U" shape structure, a ball screw arranged on the inner side of the clamping frame, a detection assembly arranged on the surface of the ball screw, and a soot blowing assembly arranged on one side of the clamping frame; The clamping frame comprises a frame body and clamping assemblies arranged on both sides of the opening of the frame body; the detection assembly comprises a detection shell, a limiting slide frame, a laser scanner, and a cleaning brush ring, one side of the detection shell facing the connecting plate is provided with the laser scanner, the surface of the detection shell above the laser scanner is provided with the cleaning brush ring, the bottom end of the side of the detection shell away from the cleaning brush ring is fixedly connected with the limiting slide frame, and the upper surfaces of the detection shell and the limiting slide frame are provided with a driving assembly and a transmission assembly; the same driving assembly and transmission assembly are matched to drive the detection shell to move along the ball screw, and the cleaning brush ring rotates synchronously; The soot blowing assembly is communicated with the detection assembly through the air guide pipe, and the soot blowing assembly blows clean air flow to the laser detection area of the connecting plate.

[0006] Preferably, a limiting sliding groove is arranged on the inner side wall of the clamping frame facing the connecting plate.

[0007] Preferably, a limiting sliding rod is vertically fixed on the frame body on both sides of the clamping frame and at a position corresponding to the detection shell, a limiting sliding block is sleeved on the surface of the limiting sliding rod, and one end of the limiting sliding block away from the limiting sliding rod is fixedly connected with the detection shell on both sides.

[0008] Preferably, the soot blowing assembly comprises a wind guide cylinder, an air guide pipe, a fixing frame, a first servo motor, a fan blade, a dust filter plate, and an air outlet; the clamping frame is provided with the wind guide cylinder on one side, the fixing frame is fixed in the inner cavity of the wind guide cylinder, one side of the fixing frame facing the inner side of the wind guide cylinder is provided with the first servo motor, and the power output end of the first servo motor is fixedly connected with the fan blade; the air outlet is arranged on the side of the wind guide cylinder facing the clamping frame, the side of the wind guide cylinder away from the clamping frame is provided with the dust filter plate, and the outer side of the air outlet is in intercommunication connection with one end of the air guide pipe.

[0009] Preferably, a plurality of groups of air exhaust pipes are nested on the surface of the side of the detection shell facing the connecting plate, the air inlet end of the air exhaust pipe is in intercommunication connection with one end of the air guide pipe away from the air outlet, and the air outlet end of the air exhaust pipe is directed to the laser scanning direction of the laser scanner.

[0010] Preferably, the driving assembly comprises a second servo motor, a first belt pulley, a first transmission belt and a rotating shaft; the side of the limiting slide away from the detection shell is provided with the second servo motor, the power output end of the second servo motor is connected with the first belt pulley through the shaft coupling, and the surface of the first belt pulley is provided with the first transmission belt; the top end of the detection shell and below the cleaning brush ring are rotationally connected with the rotating shaft, the top end of the rotating shaft is fixedly connected with the center position of the cleaning brush ring, the surface of the rotating shaft is provided with a belt connecting groove, and the surface of the belt connecting groove is provided with the second transmission belt; and the side of the detection shell facing the second servo motor is provided with a transmission assembly.

[0011] Preferably, the transmission assembly comprises a screw sleeve, a second belt pulley and a second belt groove; the side of the detection shell facing the second servo motor is embedded with the screw sleeve, and the screw sleeve is threadedly connected with the ball screw; the surface of the end of the screw sleeve away from the detection shell is fixedly connected with the second belt pulley, and the surface of the second belt pulley is provided with two groups of second belt grooves; and the end of the first transmission belt away from the first belt pulley and the end of the second transmission belt away from the rotating shaft are respectively sleeved in the corresponding grooves of the second belt pulley through the two groups of second belt grooves.

[0012] Preferably, the clamping assembly comprises a hand screw, an extension rod, a clamping block and a rotating connecting shaft; the two sides of the opening end of the frame body are threadedly connected with the hand screws, the end of the hand screw towards the inner side of the frame body is rotationally connected with the rotating connecting shaft, and the side of the rotating connecting shaft away from the hand screw is fixedly connected with the clamping block; the two sides of the clamping block are provided with the extension rods, and the side of the extension rod away from the clamping block is fixedly connected with the inner side wall of the opening end of the clamping frame.

[0013] Preferably, the side of the clamping block facing the steel arch is provided with an antiskid rubber pad.

[0014] Compared with the prior art, the present application has the following advantages: The second servo motor drives the rotation of the screw sleeve, the first transmission belt and the second belt pulley, so that the screw sleeve rotates and moves on the fixed screw surface, thereby driving the detection shell and the laser scanner to automatically move along the ball screw shaft, realizing the scanning detection on the gap of the connecting plate connection, solving the problem that the traditional detection by means of a plug gauge cannot ensure accuracy, effectively improving the detection efficiency and detection convenience, and when detecting, the rotating screw sleeve can drive the cleaning brush ring to rotate through the second transmission belt, so that the cleaning brush ring can clean the dust on the scanning surface of the connecting plate during detection, avoiding the interference of dust on the laser scanning, effectively improving the accuracy of the detection data, and ensuring the butt joint fixing quality of the steel arch.

[0015] The blowing ash assembly makes the first servo motor drive the fan blade to rotate to generate airflow during the detection process, the airflow is transported to the exhaust pipe of the detection shell through the air guide pipe and blows to the detection surface of the connecting plate, can timely blow away the dust on the surface or the dust swept by the cleaning brush from the connecting plate surface, avoid secondary pollution caused by dust accumulation or reattachment from the source, can further prevent dust from affecting the scanning environment, ensure that the laser scanner always works on a clean detection surface, further ensure the stability of the detection process and the reliability of the detection result.

[0016] The clamping frame adopts a "U" type structure, is matched with a hand screw rod, an extension rod and a clamping block, and only needs to cover the detection surface of the connecting plate when in use, moves the clamping block inwards by twisting the hand screw rod, and is quickly abutted and fixed on both sides of the connecting plate, and after clamping and fixing, the laser scanner in the detection shell can directly face the connecting plate connection, without repeated position adjustment, saves time and effort, effectively reduces the equipment debugging difficulty, improves the use convenience, and further improves the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the present application; Figure 2 It is a clamping frame structure schematic view of the present application; Figure 3 It is a detection assembly structure schematic view of the present application; Figure 4 It is a driving assembly structure schematic view of the present application; Figure 5 It is a lead screw sleeve structure schematic view of the present application; Figure 6 It is a further driving assembly structure schematic view of the present application; Figure 7 It is a blowing ash assembly structure schematic view of the present application; Figure 8 It is a further clamping frame structure schematic view of the present application.

[0018] In the figure: 1, steel arch; 2, connecting plate; 3, clamping frame; 4, soot blowing assembly; 5, detection assembly; 6, ball screw; 7, driving assembly; 8, cleaning brush ring; 9, belt connection groove; 10, limiting sliding rod; 11, exhaust pipe; 31, frame body; 32, limiting sliding groove; 33, hand screw; 34, telescopic rod; 35, clamping block; 36, rotating connecting shaft; 41, air duct; 42, air duct; 43, fixing frame; 44, first servo motor; 45, fan blade; 46, dust filter plate; 47, air outlet; 51, detection housing; 52, limiting sliding block; 53, limiting sliding frame; 54, laser scanner; 71, second servo motor; 72, first belt pulley; 73, first transmission belt; 74, transmission assembly; 75, second transmission belt; 76, rotating shaft; 741, screw sleeve; 742, second belt pulley; 743, second belt groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Please refer to Figures 1-8 The present application provides a technical solution: a tunnel primary support steel arch connecting plate close contact degree detection equipment, which comprises a steel arch 1, a connecting plate 2 arranged at the connecting end of the steel arch 1, and a detection frame for connecting plate 2 close contact degree detection, the detection frame comprising a clamping frame 3, a ball screw 6, a detection assembly 5 arranged on the surface of the ball screw 6, and a soot blowing assembly 4 arranged on one side of the clamping frame 3. The clamping frame 3 comprises a frame body 31 and a clamping assembly, and the clamping frame 3 has a "U" shaped structure, and the clamping assembly is arranged on both sides of the opening of the clamping frame 3. The clamping frame 3 adopts a "U" shaped structure and sets the clamping assembly on both sides of the opening, which can quickly cover the frame body 31 to the detection area of the connecting plate 2 and clamp and fix it from both sides, without single side fixing and repeated adjustment, which not only simplifies the steps of clamping operation, but also improves the close contact stability of the clamping frame 3 and the connecting plate 2 (no displacement after manual shaking after clamping), and provides a reliable fixed foundation for subsequent detection.

[0021] The detection assembly 5 comprises a detection shell 51, a limiting slide 53 and a laser scanner 54. The side of the detection shell 51 facing the connecting plate 2 is provided with the laser scanner 54. The surface of the detection shell 51 above the laser scanner 54 is provided with a cleaning brush ring 8. The side of the detection shell 51 opposite to the cleaning brush ring 8 is fixedly provided with the limiting slide 53 at the bottom end. The upper surfaces of the detection shell 51 and the limiting slide 53 are provided with a driving assembly 7 and a transmission assembly 74 for synchronously driving the detection shell 51 to move and the cleaning brush ring 8 to rotate by a single power source. The detection assembly 5 integrates the laser scanner 54 and the cleaning brush ring 8 in the detection shell 51. In cooperation with the limiting slide 53 and the synchronously drivable driving assembly and transmission assembly 74, the detection assembly 5 can clean the surface impurities (floating dust, welding slag, etc.) in real time while detecting the adhesion degree of the connecting plate 2. The limiting slide 53 and the subsequent limiting slide block 52 form a double limiting structure, which guarantees stable movement and effectively balances the detection accuracy and efficiency.

[0022] According to Figures 2 to 6As shown, the drive assembly 7 includes a second servo motor 71, a first pulley 72, a first transmission belt 73, a transmission assembly 74, a second transmission belt 75 and a rotating shaft 76, the side of the limiting sliding frame 53 relative to the detection shell 51 is provided with the second servo motor 71 (the core power source), the power output end of the second servo motor 71 is connected with the first pulley 72 through the shaft coupling, the surface of the first pulley 72 is sleeved with the first transmission belt 73, the top end of the detection shell 51 below the cleaning brush ring 8 is rotatably connected with the rotating shaft 76, and the top end of the rotating shaft 76 is fixedly connected with the center position of the cleaning brush ring 8, the surface of the rotating shaft 76 is provided with a belt connecting groove 9, the surface of the belt connecting groove 9 is sleeved with the second transmission belt 75, the side of the detection shell 51 facing the second servo motor 71 is provided with the transmission assembly 74, the transmission assembly 74 includes a screw sleeve 741, a second pulley 742 and a second belt groove 743, the detection shell 51 facing the second servo motor 71 is nested with the screw sleeve 741, and the screw sleeve 741 is threadedly connected to the surface of the ball screw 6, the surface of one end of the screw sleeve 741 is fixedly connected with the second pulley 742, the surface of the second pulley 742 is provided with two groups of second belt grooves 743 (adapted to two groups of transmission belts respectively), and one end of the first transmission belt 73 and the second transmission belt 75 is sleeved with the surface of the second pulley 742 through the second belt groove 743 respectively, the side of the clamping frame 3 relative to the connecting plate 2 is provided with a limiting sliding groove 32, and the limiting sliding frame 53 is slidably arranged in the inner cavity of the limiting sliding groove 32, the limiting sliding frame 3 is vertically fixed with the limiting sliding rod 10 at the positions corresponding to the detection shell 51 on both sides, the surface of the limiting sliding rod 10 is sleeved with the limiting sliding block 52, and the limiting sliding block 52 is fixed on both sides of the detection shell 51 respectively; after the second servo motor 71 is started, the second pulley 742 and the screw sleeve 741 are driven to rotate through the belt transmission, the screw sleeve 741 moves axially along the fixed ball screw 6 under the double limiting structure formed by the limiting sliding block 52 and the limiting sliding frame 53, thereby driving the detection shell 51 and the laser scanner 54 to move to realize the scanning detection of the detection surface of the connecting plate 2, at the same time, the rotating shaft 76 and the cleaning brush ring 8 are driven to rotate synchronously through the other belt transmission of the second pulley 742, the scanning surface is cleaned in real time, and the accuracy of scanning is effectively improved.

[0023] According to Figure 1 and Figure 7As shown, the soot blowing assembly 4 includes a draft tube 41, an air duct 42, a fixed frame 43, a first servo motor 44, a fan blade 45, a dust filter plate 46 and an air outlet 47. The draft tube 41 is arranged on one side of the clamping frame 3, and the fixed frame 43 is fixed in the inner cavity of the draft tube 41. The first servo motor 44 is arranged on one side of the fixed frame 43, and the power output end of the first servo motor 44 is fixedly connected with the fan blade 45. The air outlet 47 is arranged on one side of the draft tube 41 facing the clamping frame 3, and the dust filter plate 46 is arranged on the other side of the draft tube 41 relative to the clamping frame 3. The dust filter plate 46 can filter impurities in the air to ensure clean airflow. The air duct 42 is connected to the outside of the air outlet 47. The detection housing 51 is located on the same side surface of the laser scanner 54 and is nested with a plurality of exhaust pipes 11 (the exhaust end is directed towards the laser scanning direction). The air inlet end of the exhaust pipe 11 is connected to the air outlet end of the air duct 42. During detection, the airflow generated by the fan blade 45 driven by the first servo motor 44 is directed to the detection surface through the air duct 42 and the exhaust pipe 11. The dust on the detection surface and the impurities cleaned by the cleaning brush ring 8 can be removed in time, avoiding dust pollution of the detection surface and ensuring the accuracy of laser scanning.

[0024] According to Figure 1 , Figure 2 and Figure 8 , the clamping assembly includes a hand screw rod 33, an extension rod 34 and a clamping block 35. The hand screw rod 33 is threadedly connected to both sides of the opening end of the frame body 31. The rotating connection shaft 36 is rotatably connected to the inner side of the hand screw rod 33. The clamping block 35 is connected to the inner side of the rotating connection shaft 36. The extension rod 34 is arranged on both sides of the clamping block 35 and is fixed to the inner side of the clamping frame 3 on the other side. The anti-slip rubber pad is arranged on the inner side of the clamping block 35. By rotating the hand screw rod 33 forward and backward, the clamping block 35 is moved forward and backward along the threaded hole arranged on the clamping frame 3. The clamping block 35 is pushed by the rotating connection shaft 36 and moves forward and backward under the guidance and limitation of the extension rod 34. Thus, the connecting plate 2 of different sizes can be quickly and stably clamped within a certain range. The operation is convenient and the clamping is firm and not easy to loosen, effectively improving the convenience of use.

[0025] It should be noted that the laser scanner 54 emits a laser beam to the connecting surface of the connecting plate 2. The laser is reflected after encountering the surface of the connecting plate 2. The scanner records the time difference between the emission and reception of the laser, accurately calculates the distance from the scanning point to the scanner, and moves along the connecting seam direction of the connecting plate 2 during the detection process, continuously collecting massive distance data of the connecting area, and forming a three-dimensional contour model of the connecting surface of the connecting plate 2. By comparing the three-dimensional contour with the preset "standard close state", the gap width between the connecting surfaces, the degree of concave or convex can be quantitatively analyzed: if the deviation between the actual contour and the standard contour is within the allowable range, it means that the close degree of the connecting plate 2 is qualified; if the deviation exceeds the threshold, it means that the close degree is poor, such as the gap is too large or the local is not close. This technology is the prior art, and will not be described here.

[0026] The working principle and use steps are as follows: first, the open end of the clamping frame 3 in the "U" structure is aligned with the detection surface of the connecting plate 2 and covers it, the clamping block 35 is pushed inward by twisting the hand screw rod 33, and the clamping block 35 is fixed on both sides of the connecting plate 2 through the guidance and limiting of the telescopic rod 34 (single operation time is short), at this time the laser scanner 54 in the detection shell 51 is opposite to the connecting plate 2 connection; Then start the equipment through the external supporting industrial grade PLC controller (support parameter setting, data storage and export), the second servo motor 71 drives the second pulley 742 and the screw sleeve 741 to rotate through the first transmission belt 73, so that the screw sleeve 741 moves along the fixed ball screw 6 axis direction, and then drives the detection shell 51 and the laser scanner 54 to move along the gap direction of the connecting plate 2 connection to carry out scanning detection, at the same time the rotating second pulley 742 drives the rotating shaft 76 and the cleaning brush ring 8 to rotate synchronously through the second transmission belt 75, and the connecting plate 2 scanning surface is cleaned in real time; During the detection process, the airflow generated by the rotation of the first servo motor 44 driven fan blade 45 is delivered to the exhaust pipe 11 of the detection shell 51 through the air guide pipe 42, so as to blow the dust generated by cleaning away from the surface of the connecting plate 2, and the detection shell 51 moves stably under the double limiting of the limiting sliding block 52 sliding along the limiting sliding rod 10 and the limiting sliding frame 53 sliding in the limiting sliding groove 32, finally completes the accurate detection of the close degree of the connecting plate 2, reduces the detection difficulty and improves the convenience of detection.

[0027] Structural expansion, the outer side end of the limiting sliding block 52 is vertically provided with a sleeve hole, and is sleeved on the limiting sliding rod 10, so as to move along the fixed track during the movement of the detection shell, and then ensure the accuracy of scanning.

[0028] The present application is equipped with an external controller, which belongs to the prior art for controlling and operating the equipment.

[0029] The beneficial effects, through the "U" type structure clamp holder 3 collocation hand screw rod 33, telescopic rod 34 and clamp block 35, can quickly cover and fix the connecting plate 2, without repeated adjustment, so that the laser scanner 54 in the detection shell 51 is opposite to the connecting part, the positioning efficiency is improved significantly, the debugging difficulty is reduced and the operation is labor-saving, at the same time, the second servo motor 71 is driven, the first transmission belt 73, the second pulley 742 drive the lead screw sleeve 741 to move along the fixed ball screw 6, realize the automatic scanning detection of the laser scanner 54 to the connecting plate 2 gap, solve the problem of low accuracy and low efficiency of traditional plug gauge detection, at the same time, the rotating lead screw sleeve 741 can also drive the cleaning brush ring 8 to clean the scanning surface dust synchronously through the second transmission belt 75, improve the detection data accuracy; In addition, the dust blowing assembly 4 of the equipment can drive the fan blade 45 to produce airflow through the first servo motor 44, the dust or impurities generated by cleaning is blown away from the detection surface through the air guide pipe 42 and the exhaust pipe 11, avoid secondary pollution, ensure that the laser scanner 54 works in a clean environment, the detection data accuracy is improved significantly, further ensure the stability of detection process and the reliability of results, effectively improve the detection efficiency, convenience and quality.

[0030] The effect achieved by the whole mechanism is: Two preparations are needed before the equipment starts, one is equipment state check, check the connection stability of external industrial grade PLC controller and equipment, confirm that the controller parameters (such as scanning accuracy, moving speed, detection threshold value, etc.) are preset, at the same time, check whether the dust filter plate 46 of the dust blowing assembly 4 is clean, whether the cleaning brush ring 8 is intact, whether the lens of the laser scanner 54 is not blocked, ensure that each executive component is in normal standby state; The second is detection position positioning, according to the actual installation position of the connecting plate 2 of the steel arch 1, the opening end of the clamp holder 3 with "U" type structure is aligned with the connecting plate 2 detection area, so that the detection assembly 5 (laser scanner 54, cleaning brush ring 8) in the inside of the clamp holder 3 is opposite to the fitting gap of the connecting plate 2, preliminarily adjust the equipment posture to ensure that the scanning direction is perpendicular to the detection surface; After preparation, the clamping and fixing system enters the operation stage. In this stage, the clamping assembly is mechanically linked to rigidly fix the connecting plate 2 of the steel arch 1, avoiding errors caused by displacement of the equipment during detection. Specifically, the operator synchronously rotates the hand screw rod 33 on both sides of the opening of the clamping frame 3. Since the hand screw rod 33 is threadedly connected with the frame 31, the screw rod feeds axially inward along the threaded hole when it rotates. The inside of the hand screw rod 33 is connected with the clamping block 35 through the rotating connecting shaft 36. This structure can avoid rotation of the screw rod driving the clamping block 35 to rotate, ensuring that the clamping block 35 always maintains a parallel posture with the side of the connecting plate 2. Meanwhile, the extension rods 34 on both sides of the clamping block 35 synchronously extend and retract with the movement of the clamping block 35. The guiding effect of the extension rods 34 makes the clamping block 35 move only in the horizontal direction, preventing it from deviating or tilting. When the anti-slip rubber pads on the inside of the clamping block 35 are tightly attached to both sides of the connecting plate 2, stop rotating the hand screw rod 33. At this time, the anti-slip rubber pads further improve the clamping stability by increasing the friction force. There is no displacement when the equipment is manually shaken. The fixing is completed. This process can be adapted to connecting plates 2 of different sizes, and the bidirectional clamping method does not need to be adjusted repeatedly, so the positioning efficiency is high. After clamping and fixing are completed, the detection shell 51 is embedded in the limiting sliding groove 32 inside the clamping frame 3 through the limiting sliding bracket 53, and the limiting sliding blocks 52 on both sides of the detection shell 51 are sleeved on the vertically fixed limiting sliding rods 10, forming a double-limiting structure, which lays a foundation for stable movement of the subsequent detection assembly 5. Subsequently into the core detection system running phase, through a single drive source (second servo motor 71) linkage transmission system, synchronous implementation detection component 5 mobile scanning, cleaning brush ring 8 rotation cleaning, cooperate with blowing component 4 airflow purification, ensure the accuracy of laser scanner 54 scanning data, wherein the drive and transmission system as the power core, through the double belt transmission path to realize the power distribution, the second servo motor 71 as the core power source, PLC controller sends start command after the preset speed start, its power output end through the coupling drives the first pulley 72 rotation, the first pulley 72 through the surface of the first transmission belt 73 will power transmission to the transmission component 74 of the second pulley 742, the second pulley 742 surface opening two groups of independent second belt groove 743, one group through the first transmission belt 73 receives power from the first pulley 72, drives the second pulley 742 rotation, another group through the second transmission belt 75 will power transmission to the rotating shaft 76 (rotating shaft 76 surface is provided with a belt connection groove 9 adapt to the second transmission belt 75) at the top of the detection shell 51, realize the energy saving design of "single motor drive double execution components"; The cleaning system is composed of cleaning brush ring 8 and blowing component 4, according to the order of "mechanical cleaning + airflow blowing", remove the impurities on the connecting plate 2 detection surface, avoid dust, welding slag and other influence laser scanner 54 scanning accuracy, in the mechanical cleaning link, the second pulley 742 drives the rotating shaft 76 rotation through the second transmission belt 75, the rotating shaft 76 top and cleaning brush ring 8 center fixed connection, so the cleaning brush ring 8 rotates with the rotating shaft 76, the cleaning brush ring 8 bottom and the connecting plate 2 surface light contact, in the detection component 5 moving process, the rotating brush ring can sweep the dust, welding slag and other solid impurities on the connecting plate 2 detection surface away from the laser scanning area, form "front cleaning" effect, airflow purification link and the second servo motor 71 synchronous start, the first servo motor 44 drives blowing component 4 operation, drives the fan blade 45 in the air inlet duct 41 high speed rotation, the filter dust plate 46 on the side of the air inlet duct 41 away from the clamping frame 3 filters the air suction, avoid the outside dust into the airflow system, the filtered clean airflow enters the air outlet 47 of the air inlet duct 41 into the air guide pipe 42, the air guide pipe 42 will airflow delivery to the surface of the detection shell 51 nested multiple exhaust pipe 11, the exhaust pipe 11 exhaust end directional towards the scanning direction of the laser scanner 54, blow the impurities swept by the cleaning brush ring 8 away from the connecting plate 2 detection surface, prevent the impurities secondary attachment, form "post purification" effect;The moving scanning of the laser scanning system is synchronized with the cleaning system, and the full collection of the data of the close-fitting degree of the connecting plate 2 is realized through mechanical movement and laser ranging. When the detection assembly moves, the second belt pulley 742 rotates to drive the centrally nested screw sleeve 741 to rotate synchronously. Since the screw sleeve 741 is threadedly connected with the ball screw 6 on the inner side of the clamping frame 3, and the detection assembly 5 is doubly limited by the limiting slide 53 (sliding along the limiting sliding groove 32) and the limiting slide block 52 (sliding along the limiting slide rod 10), the screw sleeve 741 cannot rotate with the second belt pulley 742, but moves at a constant speed along the ball screw 6 in the axial direction. The screw sleeve 741 is fixedly connected with the detection housing 51, so as to drive the detection housing 51 and the laser scanner 54 to move stably along the close-fitting gap direction of the connecting plate 2, so as to realize full coverage scanning of the detection surface. In the laser ranging and data collection link, the laser scanner 54 moves with the detection housing 51, emits laser beams to the close-fitting surface of the connecting plate 2 at a preset frequency, the laser beams are reflected after encountering the surface of the connecting plate 2 and are received by the scanner. The scanner accurately calculates the distance of each scanning point to the scanner by recording the time difference between the laser emission and the reception, continuously collects massive distance data in the moving process, and forms a three-dimensional contour model of the close-fitting surface of the connecting plate 2. The data is transmitted to the external PLC controller in real time for storage. After the data collection is completed, the data processing and result determination stage is entered. The PLC controller compares the three-dimensional contour model of the connecting plate 2 collected with the preset “standard close-fitting state” model, quantitatively analyzes the key parameters such as the gap width between the close-fitting surfaces of the connecting plate 2 and the local depression or protrusion degree through an algorithm, and when the deviation between the actual contour of the connecting plate 2 and the standard contour is within the preset allowable range, the controller displays “close-fitting degree qualified” and stores the detection data. When the deviation exceeds the threshold value, the controller marks the unqualified area and issues an alarm, and generates a detection report containing the deviation value and the unqualified position, supports data export and printing. After the detection is completed, the equipment reset and next cycle preparation stage is entered. The PLC controller issues a stop command, the second servo motor 71 reversely rotates to drive the detection assembly 5 to reset to the initial position along the ball screw 6, the first servo motor 44 and the second servo motor 71 stop running, the soot blowing assembly 4 and the cleaning brush ring 8 stop working, the operator reversely rotates the hand screw rod 33 to make the clamping block 35 separate from the connecting plate 2, the equipment is fixed, the equipment is moved to the next connecting plate 2 detection area, and the above operation process is repeated.

[0031] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tunnel primary support steel arch connecting plate close contact degree detection equipment, comprising a steel arch (1), a connecting plate (2) arranged at the connecting position of both ends of the steel arch (1), and a detection frame for connecting plate (2) fit detection, characterized in that: the detection frame comprises a clamping frame (3) in "U" type structure, a ball screw (6) arranged in the inner side of the clamping frame (3), a detection assembly (5) arranged on the surface of the ball screw (6), and a soot blowing assembly (4) arranged on one side of the clamping frame (3); the clamping frame (3) comprises a frame body (31) and clamping assemblies arranged on both sides of the opening of the frame body (31); the detection assembly (5) comprises a detection shell (51), a limiting slide (53), a laser scanner (54) and a cleaning brush ring (8), one side of the detection shell (51) facing the connecting plate (2) is provided with the laser scanner (54), the surface of the detection shell (51) above the laser scanner (54) is provided with the cleaning brush ring (8), the bottom end of the side of the detection shell (51) away from the cleaning brush ring (8) is fixed with the limiting slide (53), the upper surfaces of the detection shell (51) and the limiting slide (53) are provided with a driving assembly (7) and a transmission assembly (74), the same driving assembly (7) cooperates with the transmission assembly (74) to drive the detection shell (51) to move along the ball screw (6), and the cleaning brush ring (8) rotates synchronously; the soot blowing assembly (4) is communicated with the detection assembly (5) through a gas guide pipe (42), and the soot blowing assembly (4) blows clean gas flow to the laser detection area of the connecting plate (2). The inner side wall of the clamping frame (3) facing the connecting plate (2) is provided with a limiting sliding groove (32), and the limiting slide (53) is slidingly embedded in the inner cavity of the limiting sliding groove (32). The limiting slide rod (10) is vertically fixed at the corresponding position of the frame body on both sides of the clamping frame (3) and the detection shell (51), the limiting slide rod (10) is sleeved with a limiting slide block (52), and one end of the limiting slide block (52) away from the limiting slide rod (10) is fixedly connected with the detection shell (51) on both sides. The soot blowing assembly (4) comprises a wind guide cylinder (41), a gas guide pipe (42), a fixed frame (43), a first servo motor (44), a fan blade (45), a dust filter plate (46) and an air outlet (47); the clamping frame (3) is provided with the wind guide cylinder (41) on one side, the fixed frame (43) is fixed in the inner cavity of the wind guide cylinder (41), one side of the fixed frame (43) facing the inner side of the wind guide cylinder (41) is provided with the first servo motor (44), and the power output end of the first servo motor (44) is fixedly connected with the fan blade (45); the air outlet (47) is arranged on the side of the wind guide cylinder (41) facing the clamping frame (3), the dust filter plate (46) is arranged on the side of the wind guide cylinder (41) away from the clamping frame (3), and the outer side of the air outlet (47) is in communication with one end of the gas guide pipe (42).

2. The tunnel primary support steel arch connecting plate close contact degree detection equipment according to claim 1, characterized in that: ​ 3. The tunnel primary support steel arch connecting plate close contact degree detection equipment according to claim 1, characterized in that: ​ 4. The tunnel primary support steel arch connecting plate close contact degree detection equipment according to claim 1, characterized in that: ​ 5. The tunnel primary support steel arch connecting plate close fit detection equipment according to claim 1, characterized in that: The detection shell (51) is nested with multiple groups of exhaust pipes (11) on the side surface facing the connecting plate (2), the air inlet end of the exhaust pipe (11) is connected with the end of the air guide pipe (42) away from the air outlet (47), and the air outlet end of the exhaust pipe (11) is directed to the laser scanning direction of the laser scanner (54).

6. The tunnel primary support steel arch connecting plate close fit detection equipment according to claim 1, characterized in that: The driving assembly (7) comprises a second servo motor (71), a first belt pulley (72), a first transmission belt (73) and a rotating shaft (76); the side of the limiting sliding frame (53) away from the detection shell (51) is provided with the second servo motor (71), the power output end of the second servo motor (71) is connected with the first belt pulley (72) through a shaft coupling, and the surface of the first belt pulley (72) is provided with the first transmission belt (73); the top end of the detection shell (51) and below the cleaning brush ring (8) are rotationally connected with the rotating shaft (76), the top end of the rotating shaft (76) is fixedly connected with the center position of the cleaning brush ring (8), the surface of the rotating shaft (76) is provided with a belt connecting groove (9), and the surface of the belt connecting groove (9) is provided with the second transmission belt (75); and the side of the detection shell (51) facing the second servo motor (71) is provided with a transmission assembly (74).

7. The tunnel primary support steel arch connecting plate close contact degree detection equipment according to claim 6, characterized in that: The transmission assembly (74) comprises a screw sleeve (741), a second belt pulley (742) and a second belt groove (743); the side of the detection shell (51) facing the second servo motor (71) is nested with the screw sleeve (741), and the screw sleeve (741) is threadedly connected with the ball screw (6); the surface of the end of the screw sleeve (741) away from the detection shell (51) is fixedly connected with the second belt pulley (742), and the surface of the second belt pulley (742) is provided with two groups of second belt grooves (743); and the end of the first transmission belt (73) away from the first belt pulley (72) and the end of the second transmission belt (75) away from the rotating shaft (76) are respectively sleeved in the corresponding grooves of the second belt pulley (742) through the two groups of second belt grooves (743).

8. The tunnel primary support steel arch connecting plate close contact degree detection equipment according to claim 1, characterized in that: The clamping assembly comprises a hand screw rod (33), an extension rod (34), a clamping block (35) and a rotating connecting shaft (36); the two sides of the opening end of the frame body (31) are threadedly connected with the hand screw rod (33), the end of the hand screw rod (33) towards the inner side of the frame body (31) is rotationally connected with the rotating connecting shaft (36), and the side of the rotating connecting shaft (36) away from the hand screw rod (33) is fixedly connected with the clamping block (35); the two sides of the clamping block (35) are provided with the extension rod (34), and the side of the extension rod (34) away from the clamping block (35) is fixedly connected with the inner side wall of the opening end of the clamping frame (3).

9. The tunnel primary support steel arch connecting plate close contact degree detection equipment according to claim 8, characterized in that: The side of the clamping block (35) facing the steel arch (1) is provided with an antiskid rubber pad.

Images