Composite array type rail bottom scanning device

Abstract

The utility model discloses a composite array type rail bottom scanning device which comprises a top plate, a door-shaped scanning frame, two first scanning boxes, two connecting shafts and two second scanning boxes, the top plate is arranged in the middle of the upper end of the door-shaped scanning frame, and a first walking mechanism is arranged on the top plate; the two connecting shafts are symmetrically arranged at the lower ends of the two sides of the door-shaped scanning frame respectively, the first scanning boxes, the connecting shafts and the second scanning boxes are in one-to-one correspondence, and the first scanning boxes and the second scanning boxes are arranged at the front ends and the rear ends of the corresponding connecting shafts respectively. The first scanning box and the second scanning box can respectively rotate relative to the door-shaped scanning frame; and the bottoms of the first scanning box and the second scanning box are respectively provided with a second walking mechanism and a plurality of probes. The composite array type rail bottom scanning device is high in flexibility and wide in scanning range, all positions of the welding seam rail bottom can be scanned more conveniently in an all-dimensional mode, and the welding seam rail bottom scanning efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail flaw detection, in particular to a composite array rail bottom scanning device. Background Art

[0002] At present, high-speed rail tracks are made of multiple sections of seamless rails that are welded and laid. In the daily maintenance of rails, due to the characteristics of many welds, wide distribution, and long travel, the scanning operation is greatly affected by human operation, resulting in low efficiency of manual scanning of the weld rail bottom; and there are many damage-prone areas on the rail bottom, which cannot be fully covered by a single scanning mode. It is necessary to use multiple equipment to perform different types of scanning on different areas, which requires a lot of work.

[0003] On August 10, 2022, the applicant applied for a portable rail bottom scanning method with publication number CN115027529B. The scanning device adopted includes a top plate and two side frames, and the upper ends of the two side frames are respectively connected to the two side edges of the top plate to form a door shape; the K scanning drive mechanism includes a driving wheel, a plurality of first driven wheels, a plurality of second driven wheels, a tensioning belt, two guide rails and two slide seats; the driving wheel is arranged on the top plate, and the two guide rails are respectively arranged on the lower ends of the corresponding side frames along the length direction of the rail, and the plurality of first driven wheels and the plurality of second driven wheels are respectively arranged on the top plate and the two side frames, and At least one second driven wheel is provided on each side of the two guide rails, the axial direction of the first driven wheel is consistent with the length direction of the rail, and the axial direction of the second driven wheel is perpendicular to the axial direction of the first driven wheel; the tensioning belt passes through the driving wheel, each first driven wheel, and each second driven wheel in turn and is tensioned; two slides are slidably mounted on the corresponding guide rails and are fixedly connected to the tensioning belt, and a single transmitting probe and a single receiving probe are mounted on the corresponding slides; when the driving wheel is rotated, one of the slides moves forward along the guide rail, and the other slide moves backward along the guide rail, so that the single transmitting probe and the single receiving probe move in opposite directions at the same speed at the same time. Although this scanning device can perform an all-round scanning of the weld rail bottom, due to the long length of the probe seat, jamming and movement obstruction often occur during the scanning process, and the probe cannot maintain contact with the top surface of the rail bottom, and the accuracy of the scanning is reduced.

[0004] In this regard, an array scanning device for ultrasonic flaw detection of rail weld bottom plates is disclosed, which is published on January 9, 2024 and has a publication number of CN117368323A, characterized in that it includes a first rail bottom plate scanning frame and a second rail bottom plate scanning frame, the first rail bottom plate scanning frame and the second rail bottom plate scanning frame are connected by a first connecting rod assembly, so that the first rail bottom plate scanning frame and the second rail bottom plate scanning frame can be placed on the rail bottom plates on both sides of the rail, the first rail bottom plate scanning frame includes a first probe box, the second rail bottom plate scanning frame includes a second probe box, the first probe box and the second probe box are mirror-symmetrical about the central vertical plane of the rail, a plurality of probes are arranged at the lower parts of the first probe box and the second probe box, the probes of the first probe box and the second probe box are evenly divided into a first group of probes and a second group of probes, the first group of probes and the second group of probes are both arranged at intervals and the first group of probes and the second group of probes are staggered, so as to compensate for each other's flaw detection areas. This scanning device reduces the size of the scanning box, making it more flexible and less likely to be blocked during the scanning process. However, the reduced size of the scanning box will lead to problems such as too small scanning coverage and low efficiency; at the same time, since the scanning device is also equipped with a balancing mechanism to balance the scanning box, when the scanning device is pushed in the opposite direction to scan the track connection, weld or abnormal protrusions on the bottom of the rail, the balancing mechanism will contact these protrusions, causing the scanning box to be unable to scan the part from the opposite direction, affecting the scanning accuracy of the position. Utility Model Content

[0005] The technical problem to be solved by the utility model is a composite array rail bottom scanning device, which has strong flexibility and a wide scanning range, and can more conveniently perform all-round scanning of various positions of the weld rail bottom, thereby improving the efficiency and accuracy of the weld rail bottom scanning.

[0006] In order to solve the above technical problems, the technical solutions adopted are as follows:

[0007] A composite array rail bottom scanning device comprises a top plate, a gate-shaped scanning frame and two first scanning boxes, wherein the top plate is arranged at the middle of the upper end of the gate-shaped scanning frame, and a first walking mechanism is provided on the top plate; the two first scanning boxes are respectively arranged at the lower ends of both sides of the gate-shaped scanning frame and are symmetrically arranged, and the device is characterized in that: it also comprises two connecting shafts and two second scanning boxes, the two connecting shafts are respectively arranged at the lower ends of both sides of the gate-shaped scanning frame and are symmetrically arranged, the first scanning box, the connecting shaft and the second scanning box correspond to each other one by one, the first scanning box and the second scanning box are respectively arranged at the front and rear ends of the corresponding connecting shaft, and the first scanning box and the second scanning box can be rotated relative to the gate-shaped scanning frame; a second walking mechanism and a plurality of probes are respectively provided at the bottom of the first scanning box and the second scanning box.

[0008] When the above-mentioned composite array rail bottom scanning device is in use, the door-shaped scanning frame is placed astride the rail so that the top plate contacts the rail head tread of the rail, and the first scanning box and the second scanning box contact the top surface of the rail bottom; during inspection, the scanning device is pushed to move along the rail, so that the first scanning box and the second scanning box scan and inspect the edge of the rail bottom foot, the rail bottom corner, and the junction area between the rail bottom and the rail waist, and the scans of the first scanning box and the second scanning box are staggered to complement each other. When it moves to the track connection part, weld or abnormal protrusion of the rail bottom and encounters an obstruction, the first scanning box or the second scanning box can be rotated and flipped up first, and a single scanning box can be used to scan, and then the whole device can be turned around and scanned in the opposite direction once; after completing the scan, the first scanning box or the second scanning box can be put down again, and the second scanning box or the first scanning box can be rotated and flipped up, and another scanning box can be used to scan, and then the whole device can be turned around and scanned in the opposite direction once. Through a total of four scans with different scanning boxes, the damage that may occur in the weld can be detected more comprehensively, and during the scanning process, the flipped scanning box can smoothly pass over the protrusion when the scanning device moves, ensuring that the scanning box for scanning can move to the inside of the protrusion. In this composite array rail bottom scanning device, the first scanning box and the second scanning box can be independent of each other and can also balance each other, so that the scanning box can remain in close contact with the top surface of the rail bottom during scanning without getting stuck, and the scanning range is expanded, making it more convenient to perform a full-scale scan of the weld rail bottom; a comprehensive scan can also be achieved for the rail connection parts, welds or abnormal protrusions on the rail bottom, and the scanning range is wider, which can effectively improve the efficiency and accuracy of the weld rail bottom scanning.

[0009] In a preferred embodiment, three probes are provided at the bottom of the first scanning box, and four probes are provided at the bottom of the second scanning box.

[0010] In a further preferred embodiment, the probes at the bottom of the first scanning box at the lower left end of the gate-type scanning frame include probes A1, A2 and A3, and the probes at the bottom of the second scanning box at the lower left end of the gate-type scanning frame include probes A4, A5, A6 and C1, and the positions of probes A1 and A4 correspond to each other, the positions of probes A2 and A5 correspond to each other, and the positions of probes A3 and A6 correspond to each other; the probes at the bottom of the first scanning box at the lower right end of the gate-type scanning frame include probes B1, B2 and C1. Probe and B3 probe, the probes at the bottom of the second scanning box at the lower right end of the door-type scanning frame include B4 probe, B5 probe, B6 probe and C2 probe, the positions of B1 probe and B4 probe correspond, the positions of B2 probe and B5 probe correspond, and the positions of B3 probe and B6 probe correspond; A1 probe, A2 probe, A3 probe, A4 probe, A5 probe, A6 probe, C1 probe, B1 probe, B2 probe, B3 probe, B4 probe, B5 probe, B6 probe and C2 probe are all single transceiver probes. By setting up multiple symmetrically arranged probes and independent C1 and C2 probes, the comprehensive detection of the horizontal width of the rail bottom can be achieved, so as to achieve the purpose of scanning the damage of the entire cross section. Usually, each probe is provided with a spring, and the probe can keep in contact with the top surface of the rail bottom under the action of the spring.

[0011] In a further preferred embodiment, the deflection angles of the A1 probe and the A4 probe are both 8° outward; the deflection angles of the A2 probe and the A5 probe are both 5° outward; the deflection angles of the A3 probe and the A6 probe are both 5° inward; the deflection angles of the B1 probe and the B4 probe are both 11° inward; the deflection angles of the B2 probe and the B5 probe are both 8° inward; the deflection angles of the B3 probe and the B6 probe are both 10° inward; the deflection angles of the C1 probe and the C2 probe are both 30° inward. Probes with different orientation angles can detect different sections of the rail bottom, thereby achieving comprehensive detection of the lateral width of the rail bottom.

[0012] In a preferred embodiment, the two connecting shafts are fixedly mounted on the lower ends of both sides of the gate-type scanning frame, and the first scanning box and the second scanning box are rotatably mounted on the front and rear ends of the corresponding connecting shafts. With this structure, the first scanning box and the second scanning box can rotate around the connecting shafts.

[0013] In a further preferred embodiment, a damper is provided at the connection parts between the first scanning box and the second scanning box and the corresponding connecting shaft. The damper can ensure that the scanning box remains in the flipped-up state after being rotated and flipped up and does not automatically flip down.

[0014] In a further preferred embodiment, the first scanning box and the second scanning box are respectively provided with an axle seat, the axle seat is provided with a first through hole matching the connecting shaft, and the first scanning box and the second scanning box are passed through the first through hole on the axle seat and are arranged on the connecting shaft; locking screws are respectively provided at the front and rear ends of the connecting shaft, and the damper is a damping pad sandwiched between the locking screw and the axle seat. The first scanning box and the second scanning box can rotate around the connecting shaft through the axle seat, and after rotation, they can maintain the flipped state under the action of the damping pad.

[0015] In another preferred embodiment, the connecting shaft includes a front connecting shaft and a rear connecting shaft, the front connecting shaft and the rear connecting shaft are rotatably mounted on the front and rear ends of the lower end of the corresponding side of the gate-type scanning frame, the first scanning box is fixedly mounted on the front connecting shaft, and the second scanning box is fixedly mounted on the rear connecting shaft. The first scanning box and the second scanning box can be rotated around the connection position through the front connecting shaft and the rear connecting shaft.

[0016] In the preferred embodiment, the top plate is further provided with two rail head positioning mechanisms, which are respectively arranged at the front and rear ends of the top plate. The rail head positioning mechanisms are used to position the scanning device to ensure that the scanning boxes on both sides of the door-type scanning frame can contact the top surface of the rail bottom.

[0017] In a further preferred embodiment, the rail head positioning mechanism includes a first screw rod, an adjusting hand wheel, a side wheel and a compression spring. The front and rear ends of the top plate are respectively provided with an adjusting block. The adjusting block is provided with a second through hole extending inward and outward. The inner wall of the second through hole is provided with a first internal thread matching the first screw rod. The inner end of the first screw rod is threadedly connected with the first internal thread on the adjusting block. The adjusting hand wheel is fixedly connected with the outer end of the first screw rod. The side wheel and the compression spring are respectively sleeved on the first screw rod. The inner side of the side wheel is provided with an annular arc surface, and the outer side surface of the side wheel is in contact with the adjusting hand wheel. The inner end of the compression spring is connected or in close contact with the adjusting block, and the outer end of the compression spring is connected or in close contact with the side wheel. During adjustment, the side wheel is pushed inward by rotating the adjusting hand wheel until the annular arc surface on the inner side of the side wheel is in contact with the top surface of the rail head under the action of the adjusting hand wheel and the compression spring.

[0018] In a further preferred embodiment, the rail head positioning mechanism further comprises a fixed wrench, a second screw is disposed at the lower end of the fixed wrench, a third through hole extending up and down is provided on the adjustment block, the third through hole is connected to the second through hole, a second internal thread matching the second screw is disposed on the inner wall of the third through hole, the fixed wrench is threadedly connected to the second internal thread on the adjustment block through the second screw, and the lower end of the second screw contacts the first screw. After the adjustment is completed, the fixed wrench can be tightened so that the lower end of the second screw is pressed against the first screw, the position of the first screw is fixed to prevent the first screw from rotating on its own.

[0019] In a preferred embodiment, a handle is provided on the top of the top plate, which facilitates the advancement and placement of the scanning device.

[0020] The above-mentioned inside and outside directions are determined according to the position of the scanning device placed on the track, the position close to the rail head tread is the inside, and the position away from the rail head tread is the outside. The above-mentioned first walking mechanism is a magnet and multiple bearings arranged at the lower end of the top plate; the second walking mechanism is a magnet and multiple bearings arranged at the lower ends of the first scanning box and the second scanning box; wherein the magnet is used to adsorb the top plate, the first scanning box and the second scanning box on the track, and the bearings are used to act as wheels. Usually, a coding wheel and an encoder are also provided on the top plate to measure the moving distance of the gantry scanning frame.

[0021] The beneficial effect of the utility model is that the composite array rail bottom scanning device has strong flexibility and a wide scanning range, and can more conveniently perform all-round scanning of various positions of the weld rail bottom, thereby improving the efficiency and accuracy of the weld rail bottom scanning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the composite array rail bottom scanning device in the embodiment of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the composite array rail bottom scanning device from another angle in an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the arrangement positions of the various probes in the scanning box of the composite array type rail bottom scanning device in the embodiment of the utility model;

[0025] Figure 4 It is a side view of the composite array type rail bottom scanning device on the rail in the embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the composite array type rail bottom scanning device in the embodiment of the utility model when performing a scanning operation on the rail;

[0027] Figure 6 It is a schematic structural diagram of the composite array rail bottom scanning device in an embodiment of the utility model when performing a secondary scanning on the rail. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0029] like Figure 1-6A composite array rail bottom scanning device shown in the figure includes a top plate 1, a gate-type scanning frame 2, two connecting shafts 3, two first scanning boxes 4 and two second scanning boxes 5. The top plate 1 is arranged in the middle of the upper end of the gate-type scanning frame 2, and a first walking mechanism 6 is provided on the top plate 1; the two connecting shafts 3 are respectively arranged at the lower ends of both sides of the gate-type scanning frame 2 and are symmetrically arranged, the first scanning box 4, the connecting shaft 3 and the second scanning box 5 correspond to each other one by one, the first scanning box 4 and the second scanning box 5 are respectively arranged at the front and rear ends of the corresponding connecting shaft 3, and the first scanning box 4 and the second scanning box 5 can be rotated relative to the gate-type scanning frame 2; the bottom of the first scanning box 4 and the second scanning box 5 are respectively provided with a second walking mechanism 7 and a plurality of probes 8.

[0030] When the above-mentioned composite array rail bottom scanning device is in use, the door-shaped scanning frame 2 is placed astride the rail, so that the top plate 1 is in contact with the rail head tread of the rail, and the first scanning box 4 and the second scanning box 5 are in contact with the top surface of the rail bottom; during inspection, the scanning device is pushed to move along the rail, so that the first scanning box 4 and the second scanning box 5 scan and inspect the edge of the rail bottom foot, the rail bottom corner, and the junction area between the rail bottom and the rail waist, and the scanning of the first scanning box 4 and the second scanning box 5 is staggered to complement each other. When it moves to the track connection part, weld or abnormal protrusion of the rail bottom and encounters an obstruction, the first scanning box 4 or the second scanning box 5 can be rotated and flipped up first, and a single scanning box can be used to scan, and then the whole device can be turned around and scanned in the opposite direction once; after completing the scan, the first scanning box 4 or the second scanning box 5 is put down, and the second scanning box 5 or the first scanning box 4 is rotated and flipped up, and another scanning box can be used to scan, and then the whole device can be turned around and scanned in the opposite direction once. Through a total of four scans with different scanning boxes, the damage that may occur in the weld can be detected more comprehensively, and during the scanning process, the flipped scanning box can smoothly pass over the protrusion when the scanning device moves, ensuring that the scanning box for scanning can move to the inside of the protrusion. In this composite array rail bottom scanning device, the first scanning box 4 and the second scanning box 5 can be independent of each other and can also balance each other, so that the scanning box can keep close contact with the top surface of the rail bottom during scanning, and there will be no jamming. The scanning range is expanded, and it is more convenient to perform a full-scale scan of the weld rail bottom; a comprehensive scan can also be achieved for the rail connection parts, welds or abnormal protrusions on the rail bottom, and the scanning range is wider, which can effectively improve the efficiency and accuracy of the weld rail bottom scanning.

[0031] Three probes 8 are provided at the bottom of the first scanning box 4 , and four probes 8 are provided at the bottom of the second scanning box 5 .

[0032] The probe 8 disposed at the bottom of the first scanning box 4 at the lower left end of the gate-type scanning frame 2 includes an A1 probe 8, an A2 probe 8 and an A3 probe 8. The probe 8 disposed at the bottom of the second scanning box 5 at the lower left end of the gate-type scanning frame 2 includes an A4 probe 8, an A5 probe 8, an A6 probe 8 and a C1 probe 8. The positions of the A1 probe 8 and the A4 probe 8 correspond to each other, the positions of the A2 probe 8 and the A5 probe 8 correspond to each other, and the positions of the A3 probe 8 and the A6 probe 8 correspond to each other. The probe 8 disposed at the bottom of the first scanning box 4 at the lower right end of the gate-type scanning frame 2 includes a B1 probe 8, a B2 probe 8 and a B3 probe 8. The probes 8 arranged at the bottom of the second scanning box 5 at the lower right end of the door-type scanning frame 2 include B4 probe 8, B5 probe 8, B6 probe 8 and C2 probe 8. The positions of B1 probe 8 and B4 probe 8 correspond to each other, the positions of B2 probe 8 and B5 probe 8 correspond to each other, and the positions of B3 probe 8 and B6 probe 8 correspond to each other. A1 probe 8, A2 probe 8, A3 probe 8, A4 probe 8, A5 probe 8, A6 probe 8, C1 probe 8, B1 probe 8, B2 probe 8, B3 probe 8, B4 probe 8, B5 probe 8, B6 probe 8 and C2 probe 8 are all single transceiver probes 8. By setting a plurality of symmetrically arranged probes 8 and independent C1 and C2 probes 8, a comprehensive detection of the horizontal width of the rail bottom can be achieved, so as to achieve the purpose of scanning the damage of the entire cross section. Usually, each probe 8 is provided with a spring, and the probe 8 can keep in contact with the top surface of the rail bottom under the action of the spring.

[0033] The deflection angles of A1 probe 8 and A4 probe 8 are both 8° outward; the deflection angles of A2 probe 8 and A5 probe 8 are both 5° outward; the deflection angles of A3 probe 8 and A6 probe 8 are both 5° inward; the deflection angles of B1 probe 8 and B4 probe 8 are both 11° inward; the deflection angles of B2 probe 8 and B5 probe 8 are both 8° inward; the deflection angles of B3 probe 8 and B6 probe 8 are both 10° inward; the deflection angles of C1 probe 8 and C2 probe 8 are both 30° inward. Probes 8 with different orientation angles can detect different sections of the rail bottom, thereby realizing comprehensive detection of the lateral width of the rail bottom.

[0034] The two connecting shafts 3 are fixedly mounted on the lower ends of both sides of the gate-type scanning frame 2, and the first scanning box 4 and the second scanning box 5 are rotatably arranged at the front and rear ends of the corresponding connecting shafts 3. With this structure, the first scanning box 4 and the second scanning box 5 can rotate around the connecting shaft 3.

[0035] A damper 9 is provided at the connection portion between the first scanning box 4 and the second scanning box 5 and the corresponding connecting shaft 3. The damper 9 can ensure that the scanning box remains in the flipped state after being turned up and does not automatically flip down.

[0036] The first scanning box 4 and the second scanning box 5 are respectively provided with an axle seat 4501, and the axle seat 4501 is provided with a first through hole matching the connecting shaft 3. The first scanning box 4 and the second scanning box 5 are passed through the first through hole on the axle seat 4501 and are arranged on the connecting shaft 3; the front and rear ends of the connecting shaft 3 are respectively provided with locking screws 301, and the damper 9 is a damping pad sandwiched between the locking screws 301 and the axle seat 4501. The first scanning box 4 and the second scanning box 5 can rotate around the connecting shaft 3 through the axle seat 4501, and after the rotation, they can maintain the flipped state under the action of the damping pad.

[0037] Two rail head positioning mechanisms 101 are also provided on the top plate 1, and the two rail head positioning mechanisms 101 are respectively arranged at the front and rear ends of the top plate 1. The rail head positioning mechanism 101 is used to position the scanning device to ensure that the scanning boxes on both sides of the door-type scanning frame 2 can contact the top surface of the rail bottom.

[0038] The rail head positioning mechanism 101 includes a first screw rod 1011, an adjusting hand wheel 1012, a side wheel 1013 and a compression spring 1014. An adjusting block 102 is respectively provided at the front and rear ends of the top plate 1. A second through hole running inward and outward is opened on the adjusting block 102. A first internal thread matching the first screw rod 1011 is provided on the inner wall of the second through hole. The inner end of the first screw rod 1011 is threadedly connected with the first internal thread on the adjusting block 102, and the adjusting hand wheel 1012 is fixedly connected with the outer end of the first screw rod 1011; the side wheel 1013 and the compression spring 1014 are respectively sleeved on the first screw rod 1011, and an annular arc surface 10131 is provided on the inner side of the side wheel 1013, and the outer side surface of the side wheel 1013 is in contact with the adjusting hand wheel 1012; the inner end of the compression spring 1014 is connected or in close contact with the adjusting block 102, and the outer end of the compression spring 1014 is connected or in close contact with the side wheel 1013. During adjustment, the side wheel 1013 is pushed inward by rotating the adjusting hand wheel 1012 until the annular arc surface 10131 inside the side wheel 1013 contacts the top surface of the rail head under the action of the adjusting hand wheel 1012 and the compression spring 1014.

[0039] The rail head positioning mechanism 101 also includes a fixed wrench 1015, the lower end of which is provided with a second screw rod 10151, and a third through hole extending up and down is provided on the adjustment block 102, the third through hole is connected with the second through hole, and a second internal thread matching the second screw rod 10151 is provided on the inner wall of the third through hole, and the fixed wrench 1015 is threadedly connected with the second internal thread on the adjustment block 102 through the second screw rod 10151, and the lower end of the second screw rod 10151 is in contact with the first screw rod 1011. After the adjustment is completed, the fixed wrench 1015 can be tightened so that the lower end of the second screw rod 10151 is pressed against the first screw rod 1011, and the position of the first screw rod 1011 is fixed to prevent the first screw rod 1011 from rotating by itself.

[0040] A handle 103 is provided on the top of the top plate 1. The handle 103 is provided to facilitate the advancement and placement of the scanning device.

[0041] The above-mentioned inside and outside directions are determined according to the position of the scanning device placed on the track, the position close to the rail head tread is the inside, and the position away from the rail head tread is the outside. The above-mentioned first walking mechanism 6 is a magnet and multiple bearings arranged at the lower end of the top plate 1; the second walking mechanism 7 is a magnet and multiple bearings arranged at the lower ends of the first scanning box 4 and the second scanning box 5; wherein, the magnet is used to adsorb the top plate 1, the first scanning box 4 and the second scanning box 5 on the track, and the bearings are used to act as wheels. A coding wheel and an encoder are also provided on the top plate 1 to measure the moving distance of the gantry scanning frame 2.

Claims

1. A composite array rail bottom scanning device, comprising a top plate, a gate-type scanning frame and two first scanning boxes, wherein the top plate is arranged at the middle of the upper end of the gate-type scanning frame, and a first walking mechanism is arranged on the top plate; the two first scanning boxes are respectively arranged at the lower ends of both sides of the gate-type scanning frame and are symmetrically arranged, characterized in that: It also includes two connecting shafts and two second scanning boxes, the two connecting shafts are respectively arranged at the lower ends of both sides of the gate-type scanning frame and are symmetrically arranged, the first scanning box, the connecting shaft and the second scanning box correspond to each other one by one, the first scanning box and the second scanning box are respectively arranged at the front and rear ends of the corresponding connecting shafts, and the first scanning box and the second scanning box can be rotated relative to the gate-type scanning frame; the bottom of the first scanning box and the second scanning box are respectively provided with a second walking mechanism and a plurality of probes.

2. A composite array rail bottom scanning device as claimed in claim 1, characterized in that: The bottom of the first scanning box is provided with three probes, and the bottom of the second scanning box is provided with four probes.

3. A composite array rail bottom scanning device as claimed in claim 2, characterized in that: The probes at the bottom of the first scanning box at the lower left end of the gate-type scanning frame include A1 probe, A2 probe and A3 probe, the probes at the bottom of the second scanning box at the lower left end of the gate-type scanning frame include A4 probe, A5 probe, A6 probe and C1 probe, the positions of A1 probe and A4 probe correspond to each other, the positions of A2 probe and A5 probe correspond to each other, and the positions of A3 probe and A6 probe correspond to each other; the probes at the bottom of the first scanning box at the lower right end of the gate-type scanning frame include B1 probe, B2 probe and B3 probe. Probes, the probes arranged at the bottom of the second scanning box at the lower right end of the portal scanning frame include B4 probe, B5 probe, B6 probe and C2 probe. The positions of B1 probe and B4 probe correspond to each other, the positions of B2 probe and B5 probe correspond to each other, and the positions of B3 probe and B6 probe correspond to each other; A1 probe, A2 probe, A3 probe, A4 probe, A5 probe, A6 probe, C1 probe, B1 probe, B2 probe, B3 probe, B4 probe, B5 probe, B6 probe and C2 probe are all single transceiver probes.

4. A composite array rail bottom scanning device as claimed in claim 3, characterized in that: The deflection angles of the A1 probe and the A4 probe are both 8° outward; the deflection angles of the A2 probe and the A5 probe are both 5° outward; the deflection angles of the A3 probe and the A6 probe are both 5° inward; the deflection angles of the B1 probe and the B4 probe are both 11° inward; the deflection angles of the B2 probe and the B5 probe are both 8° inward; the deflection angles of the B3 probe and the B6 probe are both 10° inward; the deflection angles of the C1 probe and the C2 probe are both 30° inward.

5. The composite array rail bottom scanning device according to claim 1, characterized in that: The two connecting shafts are fixedly mounted on the lower ends of both sides of the gate-type scanning frame, and the first scanning box and the second scanning box are rotatably arranged on the front and rear ends of the corresponding connecting shafts.

6. A composite array rail bottom scanning device as claimed in claim 5, characterized in that: A damper is provided at the connection position between the first scanning box and the second scanning box and the corresponding connecting shaft.

7. A composite array rail bottom scanning device as claimed in claim 6, characterized in that: The first scanning box and the second scanning box are respectively provided with shaft seats, and the shaft seats are provided with first through holes matching the connecting shaft, and the first scanning box and the second scanning box are passed through the first through holes on the shaft seats and are arranged on the connecting shaft; locking screws are respectively provided at the front and rear ends of the connecting shaft, and the damper is a damping pad clamped between the locking screws and the shaft seat.

8. The composite array rail bottom scanning device according to claim 1, characterized in that: The connecting shaft includes a front connecting shaft and a rear connecting shaft, and the front connecting shaft and the rear connecting shaft are rotatably mounted on the front and rear ends of the lower end of the corresponding side of the door-type scanning frame respectively, the first scanning box is fixedly mounted on the front connecting shaft, and the second scanning box is fixedly mounted on the rear connecting shaft.

9. The composite array rail bottom scanning device according to claim 1, characterized in that: The top plate is also provided with two rail head positioning mechanisms, which are respectively arranged at the front and rear ends of the top plate.

10. A composite array rail bottom scanning device as claimed in claim 9, characterized in that: The rail head positioning mechanism comprises a first screw, an adjusting hand wheel, a side wheel and a compression spring, and the front and rear ends of the top plate are respectively provided with an adjusting block, and a second through hole running inward and outward is opened on the adjusting block, and a first internal thread matching the first screw is arranged on the inner wall of the second through hole, and the inner end of the first screw is threadedly connected with the first internal thread on the adjusting block, and the adjusting hand wheel is fixedly connected with the outer end of the first screw; the side wheel and the compression spring are respectively sleeved on the first screw, and the inner side of the side wheel is provided with an annular arc surface, and the outer side surface of the side wheel is in contact with the adjusting hand wheel; the inner end of the compression spring is connected or in close contact with the adjusting block, and the outer end of the compression spring is connected or in close contact with the side wheel; the rail head positioning mechanism also comprises a fixed wrench, and a second screw is arranged at the lower end of the fixed wrench, and a third through hole running up and down is opened on the adjusting block, and the third through hole is connected with the second through hole, and a second internal thread matching the second screw is arranged on the inner wall of the third through hole, and the fixed wrench is threadedly connected with the second internal thread on the adjusting block through the second screw, and the lower end of the second screw is in contact with the first screw; a handle is arranged on the top of the top plate.

Images