CN114295716A - A surface defect detection device for a crane boom - Google Patents

Abstract

The invention discloses a surface defect detection device of a crane jib, wherein a top detection assembly comprises: the first detection piece is arranged on the lower surface of the support piece; the side detection assembly includes: the upper ends of the supporting frames of the two lateral detection assemblies are respectively connected to the lower surface of the supporting piece in a left-right movable manner, and the opposite surfaces of the two supporting frames are respectively provided with the second detection piece; the bottom detection assembly includes: the device comprises at least one semicircular support ring and at least one third detection piece, wherein at least one pair of side frames are respectively connected to the lower surface of the support piece in a left-right moving mode, two ends of each semicircular support ring are respectively connected with the lower end of each pair of side frames, and the third detection piece is arranged on the inner surface of each semicircular support ring; in the detection state, the first detection piece, the two second detection pieces and the third detection piece form a detection ring in an enclosing mode. The invention can realize the positioning of the surface defects of the crane jib and the full-automatic detection.

Description

A surface defect detection device for a crane boom

technical field

The invention relates to the technical field of crane boom defect detection, in particular to a surface defect detection device of a crane boom.

Background technique

Cranes are widely used in the construction of hoisting and assembling towers of angle steel towers of transmission lines because of their convenient movement and positioning, and flexible movements such as lifting, luffing, and turning. As the main force-bearing part of the crane, the boom is affected by alternating loads, fatigue, friction and wear, and corrosion, etc., and is prone to structural defects that cause the crane boom to break due to the decrease in strength, and is the main reason for the failure and fracture of the crane boom. Therefore, it is of great significance to locate and detect the structural defects of the crane boom to effectively prevent the occurrence of crane boom fracture accidents and to ensure the safety of the construction operation of the transmission line crane hoisting and assembling tower.

After the crane has been used for a certain period of time, the routine maintenance is generally to detect whether there are structural defects on the boom through manual visual inspection. It mainly relies on human eye observation and detection, and there must be false detection and missed detection of structural defects. At the same time, the cross-section shape of the crane boom is complex, and the cross-section size of the boom with different number of sections is different, which is difficult to detect.

SUMMARY OF THE INVENTION

The embodiment of the present invention provides a surface defect detection device for a crane boom, so as to solve the problem that false detection and missed detection are easily caused by manual detection in the prior art.

The embodiment of the present invention discloses the following technical solutions:

A surface defect detection device for a crane boom, comprising: a top detection component, two side detection components and a bottom detection component;

The top detection assembly includes: a support member and a first detection member, the first detection member is disposed on the lower surface of the support member;

Each of the side detection assemblies includes: a support frame and a second detection member, the upper ends of the support frames of the two side detection assemblies are respectively movably connected to the lower surface of the support member, and the two Each of the supporting frames is located symmetrically on the left and right sides of the middle portion of the supporting member, and the second detection members are respectively provided on the opposite surfaces of the two supporting frames;

The bottom detection assembly includes: at least a semicircular support ring and at least one third detection piece, at least a pair of side frames are respectively connected to the lower surface of the support piece movably left and right, at least a pair of the side parts The frames are symmetrically located on the left and right sides of the middle of the support member, the two ends of each semicircular support ring are respectively connected with the lower ends of each pair of the side frames, and the third detection member is arranged at the on the inner surface of the semicircular support ring;

In the detection state, the first detection piece, the two second detection pieces and the third detection piece enclose a detection ring for the crane boom to pass through.

The surface defect detection device of the crane boom according to the embodiment of the present invention can realize the location of the surface defects of the crane boom, realize the fully automatic detection, the detection is fast and efficient, and prevent the false detection and missed detection of the surface defects of the crane boom. It is of great significance to effectively prevent the occurrence of crane boom fracture accidents and to ensure the safety of construction operations of transmission line crane hoisting and assembling towers.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a schematic diagram of a use state of a surface defect detection device for a crane boom according to an embodiment of the present invention;

2 is a schematic structural diagram of a surface defect detection device for a crane boom according to an embodiment of the present invention;

3 is a left side view of a surface defect detection device for a crane boom according to an embodiment of the present invention;

4 is a partial structural schematic diagram 1 of a surface defect detection device for a crane boom according to an embodiment of the present invention;

5 is a second partial structural schematic diagram of a surface defect detection device for a crane boom according to an embodiment of the present invention;

6 is a partial structural schematic diagram 3 of a surface defect detection device for a crane boom according to an embodiment of the present invention;

FIG. 7 is a schematic diagram 4 of a partial structure of a surface defect detection device for a crane boom according to an embodiment of the present invention;

FIG. 8 is a schematic diagram 5 of a partial structure of a surface defect detection device for a crane boom according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

As shown in FIG. 1 , the cross-sectional shape of the boom 1 of the existing mobile crane is mostly U-shaped, that is, the upper surface and two side surfaces of the boom 1 are flat surfaces, and the lower surface is approximately an arc surface.

Embodiment 1 of the present invention discloses a surface defect detection device for a crane boom, which is used to detect the boom 1 with the above-mentioned cross-sectional shape. As shown in Figures 1-8, the surface defect detection device includes: a top detection component, two side detection components and a bottom detection component.

Wherein, the top detection component includes: a support member 2 and a first detection member. The first detection member is disposed on the lower surface of the support member 2 . The support 2 is a hollow cavity, and control devices, power supplies, data acquisition and transmission devices, etc. can be built in the cavity.

Wherein, each side detection component includes: a support frame 3 and a second detection member. The upper ends of the support frames 3 of the two side detection assemblies are respectively connected to the lower surface of the support member 2 movably left and right. The two support frames 3 are located symmetrically on the left and right sides of the middle of the support member 2 respectively. Second detection pieces are respectively provided on the opposite surfaces of the support frames 3 of the two side detection assemblies. The left and right in the embodiment of the present invention refer to the width direction along the cross-section of the boom 1 , and the front and rear refer to the extension direction of the length of the boom 1 , which will not be described in detail below.

Wherein, the bottom detection assembly includes: at least one semicircular support ring 4 and at least one third detection piece. At least a pair of side frames 5 are respectively connected to the lower surface of the support member 2 so as to be movable left and right. At least a pair of side frames 5 are located symmetrically on the left and right sides of the middle portion of the support member 2 respectively. Both ends of each semicircular support ring 4 are respectively connected with the lower ends of each pair of side frames 5 . The third detection piece is arranged on the inner surface of the semicircular support ring 4 .

In the detection state, the first detection piece, the two second detection pieces and the third detection piece form a detection ring. The detection ring is based on the profile of the cross-sectional shape of the boom 1, therefore, the detection ring is in the shape of a letter U with an upper seal.

When in use, the jib 1 of the crane is passed through the detection ring, so that the detection end of the first detection piece is attached to the upper surface of the jib 1, and the detection ends of the two second detection pieces are attached to the suspension respectively. On the two side surfaces of the arm 1 , the detection end of the third detection piece is attached to the arc-shaped lower surface of the boom 1 , so as to detect defects on the corresponding surfaces of the boom 1 respectively. Through the automatic detection method of the instrument, the problem of false detection and missed detection caused by manual detection can be solved.

Example 2

Embodiment 2 of the present invention discloses a surface defect detection device for a crane boom. As shown in FIGS. 1 to 8 , the surface defect detection apparatus of Example 2 is the same as that of Example 1. In addition, Embodiment 2 specifically discloses an implementation structure of a power member for driving the surface detection device to travel on the boom 1 .

Specifically, four bearing seats 5 are installed on the lower surface of the support member 2 , which can be installed by using bolts through threaded engagement. Two bearing seats 5 are located at the front end of the first detection piece, and the other two bearing seats 5 are located at the rear end of the first detection piece. The front and rear in the embodiment of the present invention refer to the longitudinal direction of the boom 1 , that is, the left and right directions as shown in FIG. 3 , which will not be described in detail below. A rotatable transmission shaft 6 is provided on the two bearing seats 5 located at the same end (front or rear end). Specifically, the transmission shaft 6 is installed in the inner hole of the rolling bearing. At least one traveling wheel 7 is sleeved on each transmission shaft 6 . Specifically, the traveling wheel 7 can be fixed on the transmission shaft 6 by a jack screw or a shaft key. More preferably, two traveling wheels 7 are evenly arranged on the same transmission shaft 6, and the spacing between the two traveling wheels 7 is adjustable, so as to adapt to the booms 1 of different cross-sectional widths, and always ensure that the traveling wheels 7 and the boom are 1 The upper surface of the contact rolls. Preferably, the support member 2 is I-shaped, and the running wheels 7 at the front end and the rear end are respectively located at the grooves formed by the I-shaped structure at the front end and the rear end. Both ends of each transmission shaft 6 are respectively sleeved with a driven wheel 8 . Four motors 9 are installed in the cavity of the support member 2 near the four corners. Specifically, four motor fixing plates 10 can be installed in the cavity of the support member 2, and the motors 9 are installed on the motor fixing plate 10 through screws and flanges. . A driving wheel 11 is sleeved on the output shaft of each motor 9 . Specifically, after the output shaft of the motor 9 passes through the motor fixing plate 10 , the driving wheel 11 is sleeved and installed thereon. A transmission belt 12 is sleeved on each driving pulley 11 , and each transmission belt 12 is sleeved on each driven pulley 8 through the lower surface of the support member 2 , and the driven pulley 8 can reduce the rotational speed and increase the torque.

When in use, the starting motor 9 drives the driving wheel 11 to rotate, the driving wheel 11 drives the transmission belt 12 to move, the transmission belt 12 drives the driven wheel 8 to rotate, the driven wheel 8 drives the transmission shaft 6 to rotate, and the transmission shaft 6 drives the traveling wheel 7 to rotate, so that the whole device is in The boom 1 can move in the front-rear direction, so as to perform full coverage detection on the length direction of the boom 1 .

Example 3

Embodiment 3 of the present invention discloses a surface defect detection device for a crane boom. As shown in FIGS. 1 to 8 , the surface defect detection apparatus of Example 3 is the same as that of Example 1 or 2. In addition, Embodiment 3 specifically discloses an implementation structure of the top detection assembly.

Specifically, the first detection element includes: a first magnetic sensor array 13 . The first magnetic sensor array 13 is arranged in a strip-shaped first sensor box 14 covering the top of the cross section of the boom 1 , and specifically, it can be sealed in the first sensor box 14 by epoxy resin. First magnets 15 are respectively disposed in the grooves at the front and rear ends of the first sensor box 14 , which can be sealed in the first sensor box 14 by epoxy resin. The first magnetic sensor array 13 should extend from the left side of the boom 1 to the right side of the boom 1 , so that full coverage detection in the width direction of the boom 1 can be achieved. Similarly, the first magnet 15 should also extend from the left side of the boom 1 to the right side of the boom 1 . The magnetic poles of the two first magnets 15 are opposite polarities, that is, one is the S pole and the other is the N pole, so that the upper surface of the boom 1 can be excited and an excitation circuit can be formed, and there are defects on the upper surface of the boom 1 The area (such as a crack) will generate a leakage magnetic field, which will be detected by the first magnetic sensor array 13 to determine whether there is a surface defect.

At least one first guide rod 16 penetrates the upper and lower surfaces of the support member 2 . Preferably, the number of the first guide rods 16 is four, and the first guide rods 16 are arranged in parallel along the left-right direction of the support member 2 at even intervals, and are located on the central axis of the support member 2 in the front-rear direction. The upper surface of the first sensor box 14 is connected to the lower end of at least one first guide rod 16, for example, through screw engagement. The first sensor box 14 is located between the front and rear running wheels 7 . The upper end of the at least one first guide rod 16 is connected to the first limiting plate 17, for example, through screw engagement. The first limiting plate 17 plays a limiting role. Specifically, each of the first guide rods 16 may be disposed on the support member 2 through the first linear bearing 18 . The two first linear bearings 18 are fixed through the upper and lower surfaces of the support member 2 . Each of the first guide rods 16 is fixedly penetrated through the holes of the corresponding two first linear bearings 18 . The first linear bearing 18 guides the first guide rod 16 .

Preferably, each first guide rod 16 is sleeved with a first compression spring 19 . The upper end of the first compression spring 19 is in contact with the lower surface of the support member 2 , and the lower end of the first compression spring 19 is in contact with the upper surface of the first sensor box 14 . The first compression spring 19 can exert force on the first sensor box 14 , even if the cross-sectional dimension of the boom 1 is smaller due to the different specifications of the boom 1 or the cross-sectional size of the boom 1 decreases with different sections, through the force of the first compression spring 19 . The elastic force can realize height adjustment of the first sensor box 14 , so that the first magnetic sensor array 13 can still fit the upper surface of the boom 1 .

Preferably, at least one first U-shaped frame 20 is clamped on the outer surface of the first sensor box 14 , which can be fixed by screwing bolts through the first U-shaped frame 20 to the upper surface of the first sensor box 14 . Install. When there are a plurality of first U-shaped frames 20, the plurality of first U-shaped frames 20 are evenly distributed at intervals. The front and rear ends of the first U-shaped frame 20 are respectively connected to the first guide wheels 21, which are used to play a guiding role in the detection process and assist the first detection component to travel in the front and rear directions of the upper surface of the boom 1. The first magnet 15 can generate an adsorption force on the boom 1, and the first guide wheel 21 can reduce the friction force generated by the adsorption.

Example 4

Embodiment 4 of the present invention discloses a surface defect detection device for a crane boom. As shown in FIGS. 1 to 8 , the surface defect detection apparatus of Example 4 is the same as that of Example 1, 2 or 3. In addition, Embodiment 4 specifically discloses an implementation structure of the side detection assembly.

The second detection element includes: a second magnetic sensor array 22 arranged vertically in a strip shape. The second magneto-sensitive sensor array 22 is disposed in the second sensor box 23, and specifically, can be sealed in the second sensor box 23 by epoxy resin. Second magnets 24 are respectively disposed in the grooves at the front and rear ends of the second sensor box 23 , which can be sealed in the second sensor box 23 by epoxy resin. The second magnetic sensor array 22 and the second magnet 24 should extend vertically from the upper end of the outer side wall of the boom 1 to the lower end of the boom 1 , so that full coverage detection of the side surface of the boom 1 can be achieved. The detection principles of the second magnetic sensitive sensor array 22 and the second magnet 24 are the same as the detection principles of the first magnetic sensitive sensor array 13 and the first magnet 15 described above, and will not be repeated here.

A first linear guide 25 is disposed on the lower surface of the support member 2 symmetrically to the left and right sides of the middle portion of the support member 2 . A movable first sliding block 26 is disposed on each of the first linear guide rails 25 . Preferably, one end of each of the first linear guide rails 25 facing the edge of the support member 2 is provided with a first limiting block 27 to prevent the first sliding block 26 from falling off. In a specific embodiment, the first sliding block 26 is movably connected to the first linear guide rail 25 through the following structure: the first linear guide rail 25 is a strip with an I-shaped cross-section, and the first sliding block 26 is a U shape, and the inner surfaces of the two side walls of the U shape are extended with bumps, and the bumps are clamped in the I-shaped groove; A first chute 28 parallel to the first linear guide 25 is defined at the front and rear ends respectively, a first convex plate extends from the front and rear ends of the first slider 26, and the threaded rod of at least one bolt passes through each of the first slides in sequence. After the position of the first sliding block 26 is adjusted for the convex plate and the first sliding groove 28 , the position of the first sliding block 26 is locked by tightening the nut. The size of the nut is larger than the width of the first sliding groove 28 , so that the first sliding block 26 can move on the first linear guide rail 25 without falling.

The lower surface of each first sliding block 26 is connected to the upper end of each supporting frame 3 in the vertical downward frame-shaped strip shape, specifically, it can be connected by threaded engagement. Each support frame 3 is provided with at least one second guide rod 29 . Preferably, the number of the second guide rods 29 pierced at the same height of the support frame 3 is two, and two second guide rods 29 are respectively pierced through the positions of each support frame 3 near the upper end and the lower end. Specifically, the support frame 3 is composed of two vertical plates parallel to each other. The two vertical plates of the support frame 3 extend a boss on the surface of the vertical plates at the front and rear ends at the position close to the upper end. Similarly, the two vertical plates of the support frame 3 are at the position close to the lower end at the front and rear ends. Extend a boss. Each second guide rod 29 can be disposed on the support frame 3 through a second linear bearing 30 . Each second linear bearing 30 is fixedly threaded and installed at each boss through a flange. The two second guide rods 29 are respectively inserted into the holes of the second linear bearing 30 at the same height and opposite bosses on the same side. The second linear bearing 30 guides the second guide rod 29 . One end of each second guide rod 29 on the same side of each support frame 3 is connected to the outer surface of the second sensor box 23 on the same side, and can be specifically connected by screw engagement. The other end of the second guide rod 29 of the same height and the same side of each support frame 3 is connected to a second limit plate 31 at the other end away from the boom 1 , which can be specifically connected by threaded engagement. The second limiting plate 31 plays a limiting role.

By moving the first slider 26, the position of the support frame 3 can be adjusted, so that the distance between the two support frames 3 can be changed according to the width of the boom 1, so that the second magnetic sensor arrays 22 on both sides of the boom 1 can be adjusted. Fit the two side surfaces of the boom 1 respectively, and adapt to booms of different widths, so as to carry out defect detection on the side surfaces.

Preferably, each second guide rod 29 is sleeved with a second compression spring 32 . One end of each second compression spring 32 is in contact with the outer surface of the vertically arranged strip-shaped second sensor box 23 on the same side, and the other end of each second compression spring 32 is in contact with the supporting frame 3 on the same side. The second compression spring 32 can exert force on the second sensor box 23. Even if the cross-sectional dimension of the boom 1 is shrunk, the distance between the second sensor box 23 and the side surface of the boom 1 can be adjusted by the elastic force of the second compression spring 32. So that the second magnetic sensor array 22 can still fit the side surface of the boom 1 .

Preferably, at least one second U-shaped frame 33 is clamped on the outer surface of the second sensor box 23 , which can be fixed by screwing bolts through the second U-shaped frame 33 to the outer surface of the second sensor box 23 . Install. The front and rear ends of the second U-shaped frame 33 are respectively connected with the second guide wheels 34 , which can assist the second detection component to travel in the front and rear directions of the side surface of the boom 1 . The second guide wheel 34 can reduce the friction force generated by the adsorption.

Preferably, two second linear guide rails 35 parallel to the first linear guide rail 25 are symmetrically disposed at the front and rear ends of each first linear guide rail 25 on the lower surface of the support member 2 . A movable second sliding block 36 is disposed on each of the second linear guide rails 35 . Preferably, one end of each second linear guide rail 35 facing the edge of the support member 2 is provided with a second limiting block 37 to prevent the second sliding block 36 from falling off. In a specific embodiment, the second sliding block 36 is movably connected to the second linear guide rail 35 through the following structure: the second linear guide rail 35 is I-shaped, the second sliding block 36 is U-shaped, and the U-shaped The inner surfaces of the two side walls of the type are extended with bumps, and the bumps are clamped in the grooves of the I-shaped; on the lower surface of the support member 2 symmetrically to the front and rear ends of each second linear guide 35, a parallel In the second chute 38 of the second linear guide rail 35, the front and rear ends of the second sliding block 36 are extended with a second convex plate, and the threaded rod of at least one bolt passes through each second convex plate and the second chute 38 in sequence. , and lock the position of the second sliding block 36 by tightening the nut, the size of the nut is larger than the width of the second sliding slot 38 , so that the second sliding block 36 can move on the second linear guide 35 without falling.

The lower surface of each second slider 36 is connected to the side frame 39 . At least one third guide wheel 40 is respectively disposed on the opposite surfaces of the side frame 39 on the left and right sides. Specifically, the side frame 39 may be composed of two parallel vertical plates, the fixed seat 41 is installed between the two parallel vertical plates of the side frame 39 , and the third guide wheel 40 is installed on the fixed seat 41 . Preferably, the third guide wheels 40 are located in the hollow position formed in the middle of the side frame 39, and the number of the third guide wheels 40 on each side is two. The third guide wheel 40 can travel in the front-rear direction on the side surface of the boom 1 . By moving the second slider 36, the position of the side frame 39 can be adjusted, so that the distance between the side frames 39 on both sides can be changed according to the width of the boom 1, so that the third guide wheels on both sides of the boom 1 can be adjusted. 40 is respectively fitted to the two side surfaces of the boom 1 to adapt to booms of different widths so as to walk on the side surfaces. When the detection device detects the boom 1, in order to prevent the detection device from deviating during movement, the third guide wheel 40 limits the straightness of the entire detection route.

Preferably, the lower end of each side frame 39 is connected to a hinge seat 42 by screws. Both ends of the third U-shaped frame 43 are fixedly connected to the hinge seats 42 at the lower ends of the two side frames 39 on the same side. The third U-shaped frame 43 is used to increase the rigidity of the side frame 39 to prevent the third guide wheel 40 from being stressed during the detection process, causing the side frame 39 to be bent and deformed due to the suspension connection.

More preferably, one end of the blocking rod 44 passes through the threaded hole in the center of the third U-shaped frame 43, and abuts the support frame 3 on the same side, so as to support the support frame 3 and prevent the support frame 3 from being bent under force. .

Example 5

Embodiment 5 of the present invention discloses a surface defect detection device for a crane boom. As shown in FIGS. 1 to 8 , the surface defect detection apparatus of Example 5 is the same as that of Example 1, 2, 3, or 4. In addition, Embodiment 5 specifically discloses an implementation structure of the bottom detection assembly.

Specifically, the third detection element includes: a third magnetic sensor array 45 . The third magneto-sensitive sensor array 45 is disposed in the third sensor box 46 , and specifically can be sealed in the third sensor box 46 by epoxy resin. A third magnet 47 is disposed in the grooves at the front and rear ends of the third sensor box 46 , and can be sealed in the third sensor box 46 by epoxy resin. The detection principles of the third magnetic sensitive sensor array 45 and the third magnet 47 are the same as the detection principles of the first magnetic sensitive sensor array 13 and the first magnet 15 described above, and will not be repeated here.

The lower end of the side frame 39 on one side is hinged to one end of the semicircular support ring 4 , and the lower end of the opposite side frame 39 on the other side is hinged to the other end of the same semicircle support ring 4 through the connecting piece 48 . For example, the hinge can be realized by the aforementioned hinge seat 42, that is, when the lower end of the side frame 39 is connected with the hinge seat 42, one end of the semicircular support ring 4 is hinged to the lower end of the hinge seat 42 on one side, and the same semicircle The other end of the support ring 4 is hinged to the lower end of the opposite hinge seat 42 on the other side through the connecting piece 48 . The link 48 may be in the form of a hinged hook.

The position of the connecting piece 48 and the lower end of the side frame 39 to which it is connected can be adjusted. Preferably, when the lower end of the side frame 39 is connected with the hinge seat 42, the position of the connecting piece 48 and the connected hinge seat 42 can be adjusted. For example, by arranging pins with different heights on the side frame 39 or the hinge seat 42, the hinge position can be adjusted.

When in use, lift up the end of the semicircular support ring 4 with the connecting piece 48, and then the semicircular support ring 4 can be hung on the side frame 39 of the corresponding side or the pin at the lower end of the hinge seat 42 through the connecting piece 48. , the detection ring can be closed to the boom 1, and the connecting piece 48 can also be removed from the side frame 39 of the corresponding side or the pin at the lower end of the hinge seat 42 to open the detection ring to remove the boom 1.

Each semicircular support ring 4 is provided with a plurality of third guide rods 49 . The inner surface side of each semicircular support ring 4 has a plurality of third sensor boxes 46 , so that the inner side of the semicircular support ring 4 is covered with third magnetic sensor arrays 45 from one end to the other end, so as to realize the Full coverage inspection of the lower surface. It should be understood that the third sensor box 46 is also arc-shaped to match the shape of the semi-circular support ring 4 . The outer surface of each third sensor box 46 is connected to the upper end of at least one third guide rod 49 , which can be specifically connected by threaded engagement. Each third limiting plate 50 is connected to the lower end of at least one third guide rod 49 , and can be specifically connected by threaded engagement. Preferably, the outer surface of a third sensor box 46 is connected to the upper ends of the two third guide rods 49 , therefore, a third limiting plate 50 is connected to the lower ends of the two third guide rods 49 , thereby making the connection more stable. Specifically, each third guide rod 49 can also be disposed on the semicircular support ring 4 through the third linear bearing 51 . Each third linear bearing 51 is fixedly arranged on the outer surface of the semicircular support ring 4 . Each third guide rod 49 is fixedly penetrated through the hole of each third linear bearing 51 . The third linear bearing 51 guides the third guide rod 49 .

More preferably, when the number of side frames 39 on the same side is at least two, the number of semicircular support rings 4 is also at least two, which are respectively connected to the corresponding side frames 39 on both sides. The third sensor boxes 46 on the at least two semi-circular support rings 4 are staggered. In a specific embodiment of the present invention, the number of side frames 39 on the same side is two, the number of semicircular support rings 7 is two, and the second sensor box 23 is located between the two semicircular support rings 7 between. Since there is an interval between two adjacent third sensor boxes 46 on each semicircular support ring 4 , this can avoid missed detection, that is, the distance between adjacent third sensor boxes 46 on one semicircular support ring 4 is The gap between them can be covered and detected by the third sensor box 46 on the other semicircular support ring 4 , which further realizes the full coverage detection of the curved lower surface of the boom 1 .

Preferably, each third guide rod 49 is sleeved with a third compression spring 52 . The upper end of each third compression spring 52 is in contact with the outer surface of the corresponding third sensor box 46 , and the lower end of each third compression spring 52 is in contact with the inner surface of the corresponding semicircular support ring 4 . The third compression spring 52 can exert force on the third sensor box 46 . Even if the section of the boom 1 is contracted, the position of the third sensor box 46 can be adjusted by the elastic force of the third compression spring 52 , so that the third magnetic sensor array 45 It can still fit the lower surface of the boom 1.

Preferably, at least one fourth guide wheel 53 is symmetrically arranged on the front and rear surfaces of each third sensor box 46 to assist the third sensor box 46 to travel in the front and rear directions of the lower surface of the boom 1 .

The detection device of the above-mentioned embodiment adopts the magnetic flux leakage detection technology combined with the actual cross-sectional size of the crane boom 1, and takes into account the differences in the dimensions of the different sections of the boom 1 of the crane of the same tonnage. The shape remains the same, and the first detection piece, the two second detection pieces and the third detection piece correspond to the four surfaces of the boom 1 respectively and are independent of each other. The detection of the fit of each surface of the boom 1 is realized, which prevents the influence of the detection lift-off value on the detection signal. At the same time, when the cross-sectional size of the boom 1 changes, under the action of the compression springs on each surface, it can still be at a certain level. It fits each surface of the boom 1 within the range, so that the detection range of the detection device has a wide range.

In use, for example, when the size of the boom 1 of different tonnage cranes varies too much, it is assumed that the boom 1 that the detection device is designed to detect is the boom 1 of an 80t crane. When testing the boom 1 of the 50t crane, the section size of the boom 1 of the 50t crane must be smaller than the section size of the boom 1 of the 80t crane. At this time, the variation range of the compression spring cannot compensate for the reduction of the section size of the boom 1. . In this case, the top detection component does not need to be replaced, but the two side detection components will be empty, which has no effect on the detection signal. By manually moving the first sliding block 26 toward the center of the boom 1, the distance between the support frames 3 on both sides can be reduced to adapt to the cross-sectional width of the boom 1 of the 50t crane. In addition, only by replacing the third sensor boxes 46 with different radii, the detection of the booms 1 of cranes with different tonnages can be realized. The detection range of the entire detection device is larger, and at the same time, the entire detection device does not need to rely on external force, and can be fully automatically detected, so as to realize the acquisition of the magnetic field signal of the surface defect of the boom 1 . By driving the traveling wheel 7 to walk, the full coverage detection of the entire boom 1 is realized, and the occurrence of false detection and missed detection of surface defects of the boom 1 is prevented.

To sum up, the surface defect detection device of the crane boom according to the embodiment of the present invention can realize the positioning of the surface defects of the crane boom, realize the fully automatic detection, the detection is fast and efficient, and prevent the false detection and leakage of the surface defects of the crane boom. The occurrence of inspection phenomenon is of great significance to effectively prevent the occurrence of crane boom fracture accidents and to ensure the safety of construction operations of crane hoisting and assembling towers on transmission lines.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A surface defect detection device of a crane boom is characterized by comprising: the device comprises a top detection assembly, two side detection assemblies and a bottom detection assembly;

the top detection assembly includes: the detection device comprises a supporting piece and a first detection piece, wherein the first detection piece is arranged on the lower surface of the supporting piece;

each of the side detection assemblies includes: the upper ends of the supporting frames of the two lateral detection assemblies are respectively connected to the lower surface of the supporting piece in a left-right movable manner, the two supporting frames are respectively symmetrically positioned at the left side and the right side of the middle part of the supporting piece, and the second detection pieces are respectively arranged on the opposite surfaces of the two supporting frames;

the bottom detection assembly comprises: the detection device comprises at least one semicircular support ring and at least one third detection piece, wherein at least one pair of side frames are respectively connected to the lower surface of the support piece in a left-right moving mode, the at least one pair of side frames are respectively symmetrically positioned at the left side and the right side of the middle part of the support piece, two ends of each semicircular support ring are respectively connected with the lower end of each pair of side frames, and the third detection piece is arranged on the inner surface of the semicircular support ring;

in a detection state, the first detection piece, the two second detection pieces and the third detection piece form a detection ring for the crane boom to pass through.

2. The crane boom surface defect detection apparatus of claim 1, wherein: support piece's lower surface mounting has four bearing framves, and two bearing frame symmetric positions the front end of first detection piece, two other bearing frame symmetric positions the rear end of first detection piece is located two of homopolar be provided with a rotatable transmission shaft, each on the bearing frame the cover is equipped with at least walking wheel, each on the transmission shaft the both ends of transmission shaft are respectively overlapped and are equipped with one from the driving wheel, support piece's cavity is close to four corners department and installs four motors, each the cover is equipped with the action wheel on the output shaft of motor, each the cover is established a drive belt on the action wheel, and each drive belt passes support piece's lower surface cover is established at each from the driving wheel.

3. The crane boom surface defect detecting apparatus as claimed in claim 1, wherein said first detecting member comprises: the first magnetic sensor array is arranged in a first sensor box, and first magnets are respectively arranged in grooves at the front end and the rear end of the first sensor box;

at least one first guide bar is arranged on the upper surface and the lower surface of the support piece in a penetrating mode, the upper surface of the first sensor box is connected with at least one of the lower end of the first guide bar and the upper end of the first guide bar, and the first limiting plate is connected with the upper end of the first guide bar.

4. The crane boom surface defect detection apparatus of claim 3, wherein: a first pressure spring is sleeved on each first guide rod, the upper end of each first pressure spring is in contact with the lower surface of the support piece, and the lower end of each first pressure spring is in contact with the upper surface of the first sensor box;

the outer surface of the first sensor box is provided with at least one first U-shaped frame in a clamping mode, and two ends of the first U-shaped frame are connected with first guide wheels respectively.

5. The crane boom surface defect detecting apparatus as claimed in claim 1, wherein said second detecting member comprises: the second magnetic sensor array is arranged in a second sensor box, and second magnets are respectively arranged in grooves at the front end and the rear end of the second sensor box;

the lower surface symmetry of support piece in the left and right sides at support piece's middle part respectively is provided with a first linear guide, each be provided with mobilizable first slider on the first linear guide, each the lower surface of first slider is connected each the upper end of support frame, each at least one second guide bar is worn to be equipped with by the support frame, each of support frame homonymy the one end of second guide bar is connected the homonymy the surface of second sensor box, each the same height of support frame homonymy a second limiting plate is connected to the other end of second guide bar.

6. The crane boom surface defect detection apparatus of claim 5, wherein: a second pressure spring is sleeved on each second guide rod, one end of each second pressure spring is in contact with the outer surface of the second sensor box on the same side, and the other end of each second pressure spring is in contact with the support frame on the same side;

at least one second U-shaped frame is clamped on the outer surface of the second sensor box, and two ends of the second U-shaped frame are connected with second guide wheels respectively.

7. The crane boom surface defect detection apparatus of claim 5, wherein: two second linear guide rails parallel to the first linear guide rails are symmetrically arranged at the front end and the rear end of each first linear guide rail on the lower surface of the supporting piece respectively, a movable second sliding block is arranged on each second linear guide rail, the lower surface of each second sliding block is connected with a lateral frame, and at least one third guide wheel is arranged on the opposite surfaces of the lateral frames on the left side and the right side respectively.

8. The crane boom surface defect detecting apparatus as claimed in claim 7, wherein said third detecting member comprises: the third magnetic sensor array is arranged in a third sensor box, and third magnets are arranged in grooves at the front end and the rear end of the third sensor box;

the lower extreme that is located one side the lateral part frame articulates one the one end of semi-circular support ring, is located the opposite side the lower extreme of lateral part frame passes through the connecting piece and articulates same the other end of semi-circular support ring, the connecting piece with be connected the position of the lower extreme of lateral part frame is adjustable, and a plurality of third guide bars are worn to be equipped with by each semi-circular support ring, and each the internal surface side of semi-circular support ring has a plurality ofly the third sensor box, each the surface connection of third sensor box is at least one the upper end of third guide bar, every third limiting plate connection is at least one the lower extreme of third guide bar.

9. The crane boom surface defect detection apparatus of claim 8, wherein: a third pressure spring is sleeved on each third guide rod, the upper end of each third pressure spring is in contact with the outer surface of the corresponding third sensor box, and the lower end of each third pressure spring is in contact with the inner surface of the corresponding semicircular support ring;

and at least one fourth guide wheel is symmetrically arranged on the surface of the front end and the surface of the rear end of each third sensor box.

10. The crane boom surface defect detection apparatus of claim 8, wherein: when the number of the semicircular supporting rings is at least two, the third sensor boxes on the at least two semicircular supporting rings are arranged in a staggered mode.

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