CN114295717A - Crawler traveling type surface defect detection device for crane boom - Google Patents

Abstract

The invention discloses a crawler traveling type surface defect detection device of a crane boom, which comprises: the top detection assembly includes: the device comprises a first supporting cavity and two flat plate detection pieces, wherein the outer surface of the side wall of the front end or the rear end of the first supporting cavity is symmetrically provided with the two movable flat plate detection pieces; lateral part and bottom detection subassembly include: the U-shaped detection piece is positioned below the first support cavity and can be vertically, horizontally and horizontally zoomed, and two ends of the U-shaped detection piece are connected with the first support cavity; each crawler travel assembly comprises: the two second supporting cavities are respectively connected with the outer surfaces of the side walls of the front end and the rear end of the first supporting cavity, the two crawler foot parts are respectively connected with the left side and the right side of the bottom wall of the second supporting cavity, and the supporting wheels are arranged on the outer surfaces of the bottom wall of the second supporting cavity; under the detection state, the two flat plate detection pieces and the U-shaped detection piece form a detection ring in an enclosing mode. The invention can realize full-automatic detection.

Description

Crawler traveling type surface defect detection device for crane boom

Technical Field

The invention relates to the technical field of crane jib defect detection, in particular to a crawler traveling type surface defect detection device for a crane jib.

Background

The crane is convenient to move in place, flexible in actions such as lifting, amplitude changing, rotation and the like, and is widely applied to construction operation of hoisting and tower assembling of the angle steel tower of the power transmission line at present. The crane boom is used as a main stressed part of the crane, is influenced by alternating load, fatigue, frictional wear, corrosion and the like, is easy to generate structural defects to cause the crane boom to be broken due to strength reduction, and is a main cause for the occurrence of failure and breakage accidents of the crane boom. Therefore, the positioning detection of the structural defects of the crane jib has important significance for effectively preventing the crane jib from breaking accidents and ensuring the safe operation of the hoisting and tower assembling construction of the power transmission line crane.

After the crane is used for a certain time, the conventional maintenance generally detects whether the structural defects exist on the suspension arm through manual visual inspection, if some abnormalities exist on the suspension arm, the abnormal position is marked, and then the repeated detection is performed emphatically. Mainly depends on human eye observation and detection, and the structure defect false detection and missing detection are inevitable. Meanwhile, the crane boom has a complex cross section shape, the sizes of the cross sections of booms with different sections are different, and the detection difficulty is high.

Disclosure of Invention

The embodiment of the invention provides a crawler traveling type surface defect detection device for a crane boom, which aims to solve the problems that false detection and missing detection are easily caused by manual detection in the prior art.

The embodiment of the invention discloses the following technical scheme:

a crawler travel type surface defect detection device of a crane boom comprises: the crawler type traveling device comprises a top detection assembly, a side detection assembly, a bottom detection assembly and two crawler type traveling assemblies;

the top detection assembly includes: the device comprises a first supporting cavity and two flat plate detection pieces, wherein the outer surface of the side wall of the front end or the rear end of the first supporting cavity is symmetrically provided with two movable flat plate detection pieces;

the side and bottom detection assembly comprises: the U-shaped detection piece is positioned below the first support cavity and can be vertically, horizontally and vertically contracted, and two ends of the U-shaped detection piece are connected with the first support cavity;

each of the tracked travel assemblies comprising: the two second supporting cavities are respectively connected with the outer surfaces of the side walls of the front end and the rear end of the first supporting cavity, the two crawler foot components are respectively connected with the left side and the right side of the bottom wall of the second supporting cavity, and the supporting wheels are arranged on the outer surfaces of the bottom wall of the second supporting cavity;

in a detection state, the two flat plate detection pieces and the U-shaped detection piece form a detection ring for the crane jib to pass through.

The crawler traveling type surface defect detection device for the crane jib of the embodiment of the invention can realize full-automatic detection of the surface defect of the crane jib along the surface of the flowing type crane jib aiming at the characteristics of the structure and the size of the crane jib, has high detection speed and high efficiency, prevents the conditions of missing detection and false detection of the surface defect of the crane jib, effectively prevents the occurrence of the breakage accident of the crane jib, and has important significance for ensuring the safety of the construction operation of hoisting and tower assembling of the power transmission line crane. .

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a perspective view illustrating a state of use of a crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 2 is a schematic left side view of a crawler travel type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 3 is a schematic front view of a crawler type surface defect inspection apparatus for a crane boom according to an embodiment of the present invention;

FIG. 4 is a perspective view illustrating a part of a crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 5 is a schematic front view of a part of the structure of a crawler type surface defect detecting device of a crane boom according to an embodiment of the invention;

FIG. 6 is a schematic perspective view of a second partial structure of the crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 7 is a three-dimensional perspective view of a part of the structure of a crawler type surface defect detecting device of a crane boom according to an embodiment of the present invention;

FIG. 8 is a schematic perspective view of a portion of a crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 9 is a schematic perspective view of a portion of a crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view showing a part of a crawler travel type surface defect detecting apparatus of a crane boom according to an embodiment of the present invention;

FIG. 11 is a schematic front view of a part of the structure of a crawler type surface defect detecting device of a crane boom according to an embodiment of the present invention;

FIG. 12 is a schematic bottom view of a portion of a crawler travel surface defect inspection apparatus for a crane boom according to an embodiment of the present invention;

FIG. 13 is a perspective view illustrating a part of a crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention;

FIG. 14 is a schematic perspective view of a portion of a crawler travel surface defect inspection apparatus for a crane boom according to an embodiment of the present invention;

fig. 15 is a schematic perspective view of a part of the crawler type surface defect detecting apparatus for a crane boom according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1, the boom 1 of the conventional mobile crane is generally U-shaped in cross section, that is, the upper surface and two side surfaces of the boom 1 are flat surfaces, and the lower surface is an approximately arc surface.

The embodiment 1 of the invention discloses a crawler traveling type surface defect detection device for a crane boom, which is used for detecting the boom 1 with the cross section shape. As shown in fig. 1 to 15, the surface defect detecting apparatus includes: top detection assembly, lateral part and bottom detection assembly and two crawler-type advancing assemblies.

Wherein, top determine module includes: a first support chamber 2 and two flat detectors. Two movable flat plate detection pieces are symmetrically arranged on the outer surface of the side wall of the front end or the rear end of the first support cavity 2. The front and back directions in the embodiment of the present invention refer to the length direction along the boom 1, such as the left and right directions shown in fig. 2, and are not described in detail below.

Wherein, lateral part and bottom detection component include: the U-shaped detection piece is positioned below the first support cavity 2 and can be zoomed up and down, left and right. Two ends of the U-shaped detection piece are connected with the first supporting cavity 2. The left and right directions according to the embodiment of the present invention refer to the width direction along the cross section of the boom 1, such as the left and right directions shown in fig. 3; up and down refers to the height direction along the cross section of boom 1, as shown in up and down direction in fig. 3, which will not be described in detail below.

Each crawler travel assembly comprises: a second support chamber 3, two caterpillar foot members and at least one support wheel 4. Preferably, each second supporting cavity 3 may be a letter T shape, the tail portion of the second supporting cavity is the bottom of the letter T, and the two sides of the head portion are the extending end portions of the left side and the right side of the top of the letter T; thus, the tail portions of the two second supporting cavities 3 are respectively connected with the outer surfaces of the side walls of the front end and the rear end of the first supporting cavity. The two crawler foot parts are respectively connected to the left side and the right side of the bottom wall of the head part of the second support cavity 3. The support wheels 4 are provided on the outer surface of the bottom wall of the second support chamber 3. Preferably, the number of support wheels 4 per second support cavity 3 is two. The supporting wheel 4 plays a supporting role for the whole detection device. When the detection device advances, the supporting wheel 4 rolls to assist in guiding the whole detection device to move along the front-back direction of the suspension arm 1.

Under the detection state, the two flat plate detection pieces and the U-shaped detection piece form a detection ring in an enclosing mode. The detection ring is based on the cross-sectional shape profile of the boom 1, and therefore, the detection ring is U-shaped.

When the detection ring is used, the suspension arm 1 of the crane penetrates through the detection ring, so that the detection end of the flat detection piece is attached to the upper surface of the suspension arm 1, and the detection end of the U-shaped detection piece is attached to the two side surfaces and the arc-shaped lower surface of the suspension arm 1, so that the defects of the corresponding surfaces of the suspension arm 1 are respectively detected. Through the automatic detection mode of the instrument, the problems of false detection and missed detection easily caused by manual detection can be solved. In addition, the crawler-type advancing assembly drives the whole detection device to advance along the length direction of the suspension arm 1, and full-coverage detection of the suspension arm 1 is achieved.

Example 2

The embodiment 2 of the invention discloses a crawler traveling type surface defect detection device for a crane boom. As shown in fig. 1 to 15, the crawler travel type surface defect detecting apparatus of embodiment 2 is the same as that of embodiment 1. In addition, embodiment 2 specifically discloses an implementation structure of the flat panel detection assembly.

Specifically, the flat panel detection member includes: a first array of magneto-sensitive sensors 5. The first magnetic sensor array 5 is arranged in the first sensor box 6, and can be specifically sealed in the first sensor box 6 through epoxy resin glue. The grooves at the front end and the rear end of the first sensor box 6 are respectively provided with a first magnet 7, and the first sensor box 6 can be sealed by epoxy resin glue. When the two first sensor boxes 6 are aligned, the first magnetic sensor arrays 5 in the two first sensor boxes 6 extend from the left side to the right side of the boom 1 (the first magnetic sensor arrays 5 in each first sensor box 6 can respectively cover half of the width of the boom 1), and the first magnets 7 in the two first sensor boxes 6 extend from the left side to the right side of the boom 1 (the first magnets 7 in each first sensor box 6 can respectively cover half of the width of the boom 1), so that full coverage detection of the upper surface of the boom 1 can be realized. The poles of the two first magnets 7 are of opposite polarities, i.e. one is S-pole and the other is N-pole, so that excitation can be performed on the upper surface of the boom 1 and an excitation loop can be formed, and a leakage magnetic field is generated in the area where the defect (such as a crack) exists on the upper surface of the boom 1, so that the leakage magnetic field can be detected by the first magnetic sensor array 5 to determine whether the surface defect exists.

Two mounting brackets 8 are symmetrically arranged on the outer surface of the side wall of the front end or the rear end of the first supporting cavity 2. The two mounting brackets 8 are respectively close to the edges of the two sides of the first supporting cavity 2. The mounting 8 may be "Contraband" shaped. At least one first guide rod 9 is connected between the upper plate and the lower plate of the mounting frame 8, and can be connected through threads. In one embodiment, three first guide rods 9 are connected to the upper plate and the lower plate of each mounting frame 8 at regular intervals to stabilize the structure.

A first mounting plate 10 is vertically attached to the upper surface of each first sensor housing 6. Each second mounting plate 11 is disposed above each first mounting plate 10. The outer side of each first mounting plate 10 is connected to the outer side of each second mounting plate 11 by a hinge 12. Wherein said "outer side" refers to the side edge close to the first support cavity 2. Preferably, a first connecting plate extends upwards from one side of the first mounting plate 10, a second connecting plate extends upwards from one side of the second mounting plate 11, and the first connecting plate and the second connecting plate are connected through a hinge 12. Each first mounting plate 10 mounts the body of a damped door closer 13. The pivot link of each damper door closer 13 is hinged to each second mounting plate 11. The damper door closer 13 is a conventional art, and its structure will not be described herein. The upper end of each second mounting plate 11 extends with a movable plate 14 perpendicular to the second mounting plate 11. Each movable plate 14 is sleeved on the corresponding at least one first guiding rod 9. The first guide rod 9 is sleeved with a first pressure spring 15. The upper end of the first pressure spring 15 is in contact with the lower surface of the upper plate of the mounting frame 8, and the lower end of the first pressure spring 15 is in contact with the upper surface of the movable plate 14.

Through the structural design, during detection, the elastic force of the first pressure spring 15 applies pressure to the movable plate 14 sleeved on the first guide rod 9, so that the first magnetic sensor array 5 is attached to the upper surface of the suspension arm 1. Particularly, the boom 1 has a multi-section structure, each section has different sizes, when the detection device moves to the reducing position of the boom 1, for example, the detection device moves from a thicker section of the boom 1 to a thinner section of the boom 1, the elastic force of the first pressure spring 15 moves the movable plate 14 downwards, and the first magnetic sensor array 5 still adheres to the upper surface of the boom 1; for example, when the detection device is moved from a thinner section of boom 1 to a thicker section of boom 1, the force of the upper surface of boom 1 may move the first sensor housing 6 upward, and the first compression spring 15 may contract. The rotating connecting rods of the two damping door closers 13 respectively pull the first sensor boxes 6 to be in a straight line, namely the angle of the hinge 12 is 180 degrees, so that the defects of the upper surface are normally detected. Because the upper surface of the boom 1 may not be a complete plane structure, when encountering an obstacle or a step existing on the upper surface, the obstacle and the step may apply force to the first sensor box 6, so that the connecting rod of the damping door closer 13 rotates, and the first sensor box 6 is further driven to rotate around the hinge 12, thereby achieving the function of obstacle avoidance. When an obstacle is crossed, the damping door closer 13 can reset the first sensor box 6 again.

Preferably, at least one first guide wheel 16 is symmetrically arranged at each of the front end and the rear end of each first sensor box 6. When there are a plurality of first guide wheels 16 at each end, the plurality of first guide wheels 16 are evenly spaced. The first guide wheel 16 is used for guiding the detection process, and assisting the flat plate detection piece to travel in the front and back direction of the upper surface of the suspension arm 1, and in addition, the first guide wheel 16 can reduce the friction force generated by adsorption because the first magnet 7 can generate the adsorption force to the suspension arm 1.

Example 3

The embodiment 3 of the invention discloses a crawler traveling type surface defect detection device for a crane boom. As shown in fig. 1 to 15, the crawler travel type surface defect detecting apparatus of embodiment 3 is the same as that of embodiment 1 or 2. In addition, embodiment 3 specifically discloses an implementation structure of the side and bottom detection assemblies.

Specifically, the U type detects the piece and includes: a plurality of second magneto-sensitive sensor arrays 17. Each second magnetic sensor array 17 is disposed in each second sensor case 18, and may be specifically encapsulated in the second sensor case 18 by epoxy resin. The grooves at the front end and the rear end of each second sensor box 18 are respectively provided with a second magnet 19, and the second magnet can be specifically sealed in the second sensor box 18 through epoxy resin glue. The plurality of second sensor boxes 18 are sequentially hinged to form a U-shape. The detection principle of the second magnetic sensor array 17 and the second magnet 19 is the same as that of the first magnetic sensor array 5 and the first magnet 7, and the description thereof is omitted.

The two second sensor boxes 18 at the two ends of the U shape are respectively connected with the first supporting cavity 2 in a way of being capable of moving up and down and left and right, so that the U shape can be zoomed up and down and left and right.

In a particular embodiment, two second sensor housings 18 located at the two ends of the U-shape are connected to the first support chamber 2 moving up and down by:

the two second sensor housings 18 at both ends of the U-shape are connected to the lower ends of a reciprocating rod 20 at both front and rear ends thereof, for example, by screwing. The upper ends of two vertical reciprocating rods 20 at the same end are connected with a bearing plate 21 after passing through the bottom wall of the first supporting cavity 2, for example, by screw connection. The reciprocating bar 20 may move up and down. Each reciprocating rod 20 is sleeved with a second compression spring 22. A second compression spring 22 is located in the first support chamber 2. The upper end of the second compression spring 22 is in contact with the lower surface of the pressure bearing plate 21.

Through the structural design, during detection, the U-shaped detection piece surrounds the periphery of the suspension arm 1, and the second magnetic sensor array 17 is attached to the side surface and the lower surface of the suspension arm 1 for detection. When the detection device moves from a thicker section of the boom 1 to a thinner section of the boom 1, the pressure bearing plate 21 moves upwards due to the elastic force of the second pressure spring 22, and the reciprocating rod 20 is driven to move upwards in the process that the pressure bearing plate 21 moves upwards, so that the plurality of second sensor boxes 18 hinged to form a U shape are driven to move upwards, the U-shaped ring formed by hinging the plurality of second sensor boxes 18 is tightened, and the second magnetic sensor array 17 can still be attached to the lower surface of the boom 1.

In a particular embodiment, two second sensor housings 18 located at the two ends of the U-shape are connected to the first support chamber 2 in a manner to move up and down and left and right:

the inner surface of the bottom wall of the first support chamber 2 is provided with a linear guide rail 23. Two first sliding blocks 24 which can slide are symmetrically arranged on the linear guide rail 23, and the linear guide rail 23 plays a role in guiding the movement of the first sliding blocks 24. Two reciprocating rods 20 connected with the same second sensor box 18 penetrate through the first sliding blocks 24 on the same side. Therefore, when the first slider 24 moves on the linear guide 23, the reciprocating rod 20 inserted therein is moved. The lower end of a second compression spring 22 sleeved on the reciprocating rod 20 is in contact with the upper surface of a first slide block 24 through which the reciprocating rod 20 passes.

The left side and the right side of the bottom wall of the first supporting cavity 2 are symmetrically provided with two first strip-shaped openings 25 which are parallel to the linear guide rail 23. The two first bar-shaped openings 25 on the same side are respectively positioned at the front end and the rear end of the linear guide rail 23. The two reciprocating rods 20 on the same side respectively penetrate through the two first strip-shaped openings 25 on the same side. Each reciprocating bar 20 can move up and down, left and right in each first bar-shaped opening 25.

The lower end of each rotating rod 26 is hinged to the upper surface of each first sliding block 24, specifically by providing a hinge seat on the upper surface of the first sliding block 24. The cross-shaped pressing plate 27 is positioned in the first supporting cavity 2, one edge of the cross-shaped pressing plate 27 extends in the left-right direction, and the other edge extends in the front-back direction. The upper ends of the two rotating rods 26 are hinged to the lower surfaces of the left and right sides of the center of the cross-shaped pressing plate 27, and specifically, the upper ends can be hinged by arranging a hinge seat on the lower surface of the cross-shaped pressing plate 27. Preferably, the two rotating rods 26 are hinged to the cross-shaped pressure plate 27 at positions close to the center of the cross-shaped pressure plate 27. The cross press plate 27 has four bar-shaped marginal end portions. Two second guide rods 28 are respectively inserted through the front and rear ends of the cross press plate 27. The cross press plate 27 is movable up and down along the second guide bar 28. The second guide bar 28 is located within the first support cavity 2. The upper end of each second guiding rod 28 is connected with the top plate of the first supporting cavity 2, and the lower end of each second guiding rod 28 is connected with the bottom plate of the first supporting cavity 2, specifically, the second guiding rods can be connected through threads. Each second guide bar 28 is sleeved with a third pressure spring 29. The upper end of the third compressed spring 29 is in contact with the lower surface of the cross-shaped pressing plate 27, and the lower end of the third compressed spring 29 is in contact with the inner surface of the bottom plate of the first support cavity 2.

An electric push rod 30 is mounted on the outer surface of the top plate of the first support cavity 2. Specifically, the outer surface of the top plate of the first support cavity 2 is provided with a push rod mounting seat 31. The electric push rod 30 is installed at the center of the push rod installation seat 31, and can be connected through a screw. Specifically, the push rod mounting seat 31 is supported on the outer surface of the top plate of the first supporting cavity 2 through four vertical rods arranged at four corners of the push rod mounting seat 31, so that there is enough space for installing the electric push rod 30. The movable end of the electric push rod 30 can move through the top plate of the first supporting cavity 2 to contact with the upper surface of the cross-shaped pressing plate 27.

Through the structural design, the detection method of the embodiment comprises the following steps: during detection, when the detection device moves from a thicker section of the boom 1 to a thinner section of the boom 1, in addition to the above-mentioned upward movement of the reciprocating rod 20, after the pressure plate 21 is moved upward by the elastic force of the second pressure spring 22 to contact with the left and right ends of the cross pressure plate 27, the cross pressure plate 27 is also moved upward, and in the upward movement of the cross pressure plate 27, the rotating rod 26 is driven to rotate, so that the lower end of the rotating rod 26 drives the first slider 24 to move toward the middle, and the U-shaped ring formed by hinging the plurality of second sensor boxes 18 is contracted toward the middle. In the process, the elasticity of the third compressed spring 29 also assists in pushing the cross press plate 27 upward. It should be appreciated that during this process, the movable end of the power ram 30 is not extended, i.e., does not press against the cross clamp 27. In summary, when the detection device moves from a thicker section of the boom 1 to a thinner section of the boom 1, the combined action provides a tightening force to the middle and upper portions, and the U-shaped rings formed by hinging the plurality of second sensor boxes 18 tightly embrace the side and lower surfaces of the boom 1.

When the detection device moves from the thinner section of the suspension arm 1 to the thicker section of the suspension arm 1 and needs to expand the detection ring, the movable end of the electric push rod 30 moves downwards, the cross pressing plate 27 is pressed and pushed to move downwards, the cross pressing plate 27 drives the two rotating rods 26 to rotate, the two first sliding blocks 24 move towards the left side and the right side respectively, the U-shaped ring formed by hinging the plurality of second sensor boxes 18 expands outwards towards the left side and the right side, and the U-shaped ring falls under the action of self gravity, so that the U-shaped ring is expanded.

Therefore, when the detection ring passes through the steps of different sections of boom 1, the detection ring is released to pass over the steps by the above-described operation, or the detection ring is contracted, thereby realizing continuous detection of different sections of boom 1.

Preferably, at least one second guide wheel 32 is symmetrically arranged at each of the front and rear ends of each second sensor housing 18. The second guide wheel 32 is used for guiding during the detection process, and assists the side and bottom detection member to move in the front and rear direction of the side surface and the lower surface of the boom 1, and in addition, the second guide wheel 32 can reduce the friction force generated by the attraction because the second magnet 19 can generate the attraction force to the boom 1.

Example 4

The embodiment 4 of the invention discloses a crawler traveling type surface defect detection device for a crane boom. As shown in fig. 1 to 15, the crawler travel type surface defect detecting apparatus of embodiment 4 is the same as that of embodiment 1, 2 or 3. Further, embodiment 4 specifically discloses an implementation structure of the crawler travel assembly.

Specifically, the upper surface of each caterpillar foot member is connected with at least one connecting seat 33. At least one third guiding rod 34 is disposed at the upper end of the connecting seat 33. Preferably, the number of the connecting seats 33 connected to each caterpillar foot member is two, and two third guide rods 34 may be inserted into the upper end of each connecting seat 33. The upper end of the connecting seat 33 may be provided with a sliding seat 35 through which the third guide bar 34 passes. The left and right sides of the head of the T-shaped second supporting cavity 3 extend downwards to form first protruding cavities 36, and a cavity is formed between the two first protruding cavities 36. The two ends of the third guiding rod 34 are respectively connected with the left and right side plates of the first protruding cavity 36 on the same side, and can be fixed and limited through nuts. The bottom wall of each first protruding cavity 36 is opened with at least one second strip-shaped opening 37. Each connecting seat 33 is inserted through the second strip-shaped opening 37, hung on the bottom wall of the first protruding cavity 36 and capable of moving left and right in the second strip-shaped opening 37. The third guide bar 34 is sleeved with a fourth compression spring 38. One end of the fourth pressure spring 38 contacts the outer one of the left and right side plates of the first bulge cavity 36 on the same side. The other end of the fourth pressure spring 38 contacts the outer side of the left and right sides of the upper end of the connecting seat 33 on the same side. By "outboard" is meant both the side edges adjacent to the first projecting cavity 36.

Specifically, each track foot member comprises: a triangular upper anchor plate 39, a triangular lower anchor plate 40, and a track 41. The upper fixing plate 39 and the lower fixing plate 40 are disposed in parallel and opposite to each other, and are connected by a support shaft. The connecting seat 33 is connected with an upper fixing plate 39. Three first limiting wheels 42 are rotatably connected between the upper fixing plate 39 and the lower fixing plate 40 at three corners of the upper fixing plate 39 and the lower fixing plate 40, and the first limiting wheels 42 are connected to a shaft disposed between the upper fixing plate 39 and the lower fixing plate 40. The crawler belt 41 is wound around three first restraint wheels 42. The caterpillar track 41 is a magnetic adsorption type caterpillar track, so that an adsorption force can be generated between the caterpillar track 41 and the boom 1, and the magnitude of the adsorption force can be changed by adjusting the adsorption force of the magnet, so that the caterpillar track 41 is attached to the side surface of the boom 1 and does not obstruct the movement of the caterpillar track 41. A support plate 43 is disposed in parallel between the upper fixing plate 39 and the lower fixing plate 40. The support plate 43 may be connected between the upper fixing plate 39 and the lower fixing plate 40 by a fixing shaft. The support plate 43 is shaped with four convex corners. A set of second limiting wheels 44 are respectively arranged at four corners of the supporting plate 43. Specifically, two second limiting wheels 44 in each set of second limiting wheels 44 are respectively located above and below the supporting plate 43. The second stopper wheels 44 are in contact with the inner surface of the crawler 41 for supporting and stopping the crawler 41. The second restraint wheel 44 is smaller in size than the first restraint wheel 42. A first motor 45 is provided on the lower surface of the lower fixing plate 40. Specifically, a second motor fixing plate 46 is mounted on a lower surface of the lower fixing plate 40. The first motor 45 is mounted on the second motor fixing plate 46. The output shaft of the first motor 45 is sleeved with a driving wheel 47. The transmission belt 48 is wound around the driving pulley 47 and the driven pulley 49. The driven wheel 49 and a first limiting wheel 42 are sleeved on the same rotating shaft. It should be understood that the driving wheel 47, the driven wheel 49 and the transmission belt 48 are all located below the lower fixing plate 40, and therefore, the rotating shaft sleeved on the driven wheel 49 needs to penetrate through the lower fixing plate 40.

Through the structural design, during the traveling process of the detection device, the contact force enables the crawler 41 to be attached to the side surface of the boom 1, wherein the contact force comprises the adsorption force provided by the crawler 41 and the elastic force provided by the fourth pressure spring 38, and therefore the crawler 41 is prevented from slipping due to insufficient contact force. Particularly, when the detection device moves to the reducing position of the boom 1, the connecting seat 33 can stretch and contract towards the side surface of the boom 1 on the same side along the third guide rod 34 under the action of the elastic force of the fourth compression spring 38, so that the track 41 of the connected track foot component can be in contact with the side surface of the boom 1 on the same side. The first motor 45 is started to drive the driving wheel 47 to rotate, the driving wheel 47 drives the transmission belt 48 to move, the transmission belt 48 drives the driven wheel 49 to rotate, the driven wheel 49 drives the first limiting wheel 42 which is sleeved on the same rotating shaft to rotate, the first limiting wheel 42 drives the crawler 41 to move, advancing of a crawler foot component is achieved, and therefore the whole detection device is made to advance.

Example 5

The embodiment 5 of the invention discloses a crawler traveling type surface defect detection device for a crane boom. As shown in fig. 1 to 15, the crawler travel type surface defect detecting apparatus of embodiment 5 is the same as that of embodiment 1, 2, 3 or 4. In addition, embodiment 5 specifically discloses an implementation structure for assisting the centering adjustment of the detection device.

Specifically, one end of each second supporting cavity 3 facing the first supporting cavity 2 is provided with a second protruding cavity 50, so that the second supporting cavity 3 is T-shaped as a whole. The first supporting cavities 2 are connected to the second projecting cavities 50 of each second supporting cavity 3 itself. The left and right side plates of each second protruding cavity 50 are respectively provided with a third strip-shaped opening 51 symmetrically. One end of each first connecting rod 52 horizontally extends out of each third strip-shaped opening 51 and then is connected with the upper end of a second connecting rod 53 which is vertically arranged. The downward lower end of the second connecting rod 53 is connected with a third limiting wheel 54. The other ends of the two first connecting rods 52 corresponding to each second protruding cavity 50 in the third strip-shaped opening 51 are respectively hinged to two opposite corners of the diamond-shaped connecting rod 55, the other two opposite corners of the diamond-shaped connecting rod 55 are respectively hinged to the fixed seat 56 and the second sliding block 57, and the other two opposite corners of the diamond-shaped connecting rod 55 can be hinged to the fixed seat and the second sliding block by arranging hinged seats at the four corners of the diamond-shaped connecting rod 55. The inner surface of the top plate of the second protruding cavity 50 is connected with a fixing seat 56 and a first motor fixing plate 58 which are oppositely arranged. The first motor fixing plate 58 is mounted with a second motor 59. An output screw 60 of the second motor 59 passes through each second sliding block 57 and then is connected with the fixed seat 56. The hole of the second slider 57 through which the output screw 60 of the second motor 59 passes is a threaded hole that can be engaged with the thread of the output screw 60 of the second motor 59. The left and right sides of the output screw 60 of the second motor 59 are respectively provided with a parallel light bar 61 penetrating through each second slide block 57, so that the second slide blocks 57 can move more stably. The hole in the second slider 57 through which the optical rod 61 passes is a slide support hole. The two ends of the light bar 61 are respectively connected with the corresponding fixing seat 56 and the first motor fixing plate 58. The light bar 61 is arranged parallel to the boom. The lower end of each second connecting rod 53 is provided with a distance sensor 62. Specifically, the lower end of the second connecting rod 53 may extend forward or backward to a sensor mounting plate 63, and the distance sensor 62 is mounted on the sensor mounting plate 63.

By taking the example that the second motor 59 rotates forward and the third limiting wheels 54 on both sides approach to the corresponding side surfaces of the boom 1, the second motor 59 rotates forward, the output screw 60 of the second motor 59 causes the second slider 57 to move towards the second motor 59, which drives one corner of the diamond-shaped connecting rod 55 hinged to the second slider 57 to move towards the second motor 59, and two opposite corners on the left and right sides of the diamond-shaped connecting rod 55 respectively move towards the center of the diamond shape, which drives the two first connecting rods 52 to move towards the center, so that the third limiting wheels 54 on both sides approach to the corresponding side surfaces of the boom 1; conversely, when the second motor 59 rotates reversely, the output screw 60 of the second motor 59 makes the second slider 57 move towards the fixing seat 56, so as to drive one corner of the rhombic connecting rod 55 hinged with the second slider 57 to move towards the fixing seat 56, two opposite corners on the left side and the right side of the rhombic connecting rod 55 respectively move towards the left side and the right side of the rhombus, so as to drive the two first connecting rods 52 to respectively move towards the left side and the right side, so that the third limiting wheels 54 on the two sides are far away from the corresponding side surfaces of the boom 1; it is adaptable to the dimensions of the different sections of the boom 1.

The embodiment of the invention also provides the following detection method:

the distance sensors 62 on both sides detect the respective distances to the side surfaces of the corresponding boom 1 in real time during the travel of the detection means. If the track foot component deviates from the central main axis of the suspension arm 1, one track 41 of the track foot component on the left side and the right side can be caused to contact with the suspension arm 1, the other track does not contact with the suspension arm 1, the distance values detected by the distance sensors 62 on the left side and the right side are unequal, and then the second motor 59 is adjusted through signal feedback to start forward rotation, so that the second sliding block 57 moves towards the second motor 59, and then the third limiting wheel 54 is driven to approach towards the middle, when the distance values detected by the distance sensors 62 on the two sides are equal, the central section of the detection device coincides with the central section of the suspension arm 1, and then automatic centering adjustment is realized.

Therefore, the detection device of the above embodiment, based on the magnetic flux leakage detection technology in combination with the actual cross-sectional shape profile of the boom 1, realizes the automatic centering function of the device through the diamond-shaped connecting rod 55 and the distance sensor 62, adopts the obstacle crossing performance of the caterpillar self-advancing structure, can realize the step-crossing walking detection on the surfaces of different sections of the boom 1 for the steps between different sections of the crane boom 1, and can always keep the adhesion of the caterpillar 41 and the side surface of the boom 1 to prevent the occurrence of the slip phenomenon, adopts the hinge type structure to form the plurality of second sensor boxes 18 into U-shaped rings surrounding the side surface and the lower surface of the boom 1, and simultaneously cooperates with the structure capable of realizing automatic tightening, so that the second magnetic sensor array 17 always keeps the complete adhesion with the side surface and the lower surface of the boom 1, and can automatically adjust the cross-sectional size when meeting different sections of the boom 1, the first sensor box 6 on the upper surface of the suspension arm 1 adopts a door closer type structure, can be automatically opened and cross the obstacle when meeting the obstacle, and can be automatically reset when passing the obstacle.

In summary, the crawler traveling type surface defect detection device for the crane jib of the embodiment of the invention can realize full-automatic detection of the surface defect of the crane jib along the surface of the flowing type crane jib according to the structure and size characteristics of the crane jib, is rapid and efficient in detection, prevents the occurrence of missed detection and false detection of the surface defect of the crane jib, effectively prevents the occurrence of a fracture accident of the crane jib, and has important significance for ensuring the safety of construction operation of hoisting and tower assembling of a power transmission line crane.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

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

the top detection assembly includes: the device comprises a first supporting cavity and two flat plate detection pieces, wherein the outer surface of the side wall of the front end or the rear end of the first supporting cavity is symmetrically provided with two movable flat plate detection pieces;

the side and bottom detection assembly comprises: the U-shaped detection piece is positioned below the first support cavity and can be vertically, horizontally and vertically contracted, and two ends of the U-shaped detection piece are connected with the first support cavity;

each of the tracked travel assemblies comprising: the two second supporting cavities are respectively connected with the outer surfaces of the side walls of the front end and the rear end of the first supporting cavity, the two crawler foot components are respectively connected with the left side and the right side of the bottom wall of the second supporting cavity, and the supporting wheels are arranged on the outer surfaces of the bottom wall of the second supporting cavity;

in a detection state, the two flat plate detection pieces and the U-shaped detection piece form a detection ring for the crane jib to pass through.

2. The crane boom crawler travel surface defect inspection device of claim 1, wherein the slab detector 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;

the outer surface of the side wall of the front end or the rear end of the first support cavity is symmetrically provided with two mounting frames, and at least one first guide rod is connected between the upper plate and the lower plate of each mounting frame;

each the upper surface of first sensor box is connected with a first mounting panel, and each second mounting panel sets up each the top of first mounting panel, each the outer one side and each of leaning on of first mounting panel the outer one side of leaning on of second mounting panel passes through hinge connection, each the body of a damping door closer is installed to first mounting panel, each the rotation connecting rod and each of damping door closer the second mounting panel is articulated, each the upper end of second mounting panel is extended there is a perpendicular to the fly leaf of second mounting panel, each the fly leaf cover is established at least one that corresponds on the first guide bar, the cover is equipped with first pressure spring on the first guide bar, the upper end of first pressure spring with the lower surface contact of the upper plate of mounting bracket, the lower extreme of first pressure spring with the upper surface contact of fly leaf.

3. The crawler-track type surface defect detecting apparatus for a crane boom according to claim 2, wherein: and the front end and the rear end of each first sensor box are respectively and symmetrically provided with at least one first guide wheel.

4. The crane boom crawler travel surface defect inspection device of claim 1, wherein the U-shaped detector comprises: the second magnetic sensor arrays are arranged in the second sensor boxes, second magnets are arranged in grooves in the front end and the rear end of each second sensor box respectively, and the second sensor boxes are sequentially hinged to form a U shape;

the two second sensor boxes positioned at the two ends of the U shape are respectively connected with the first supporting cavity in a way of moving up and down and left and right.

5. The crawler-track type surface defect detecting apparatus for a crane boom according to claim 4, wherein: and the front end and the rear end of each second sensor box are respectively and symmetrically provided with at least one second guide wheel.

6. The crawler-track type surface defect detecting apparatus for a crane boom according to claim 4, wherein: two that are located U type both ends the lower extreme of a reciprocating motion pole is respectively connected at both ends around the second sensor box, is located two of same end reciprocating motion pole's upper end is passed connect a bearing plate, each behind the diapire of first support cavity the last cover of reciprocating motion pole is equipped with the second pressure spring, the second pressure spring is located in the first support cavity, the upper end of second pressure spring with the lower surface contact of bearing plate.

7. The crawler-track type surface defect detecting apparatus for a crane boom according to claim 6, wherein: a linear guide rail is arranged on the inner surface of the bottom wall of the first support cavity, two slidable first sliding blocks are symmetrically arranged on the linear guide rail, two reciprocating moving rods connected with the second sensor box penetrate through the first sliding blocks on the same side, and the lower end of a second pressure spring sleeved on the reciprocating moving rods is in contact with the upper surface of the first sliding block penetrated by the reciprocating moving rods;

the left side and the right side of the bottom wall of the first support cavity are symmetrically provided with two first strip-shaped openings parallel to the linear guide rail, the two first strip-shaped openings on the same side are respectively positioned at the front end and the rear end of the linear guide rail, and the two reciprocating moving rods on the same side respectively penetrate through the two first strip-shaped openings on the same side;

the lower end of each rotating rod is hinged with the upper surface of each first sliding block, the upper ends of the two rotating rods are hinged with the lower surfaces of the left side and the right side of the center of the cross-shaped pressing plate, the two second guide rods penetrate through the front end and the rear end of the cross-shaped pressing plate respectively, the upper end of each second guide rod is connected with the top plate of the first supporting cavity, the lower end of each second guide rod is connected with the bottom plate of the first supporting cavity, a third pressure spring is sleeved on each second guide rod, the upper end of each third pressure spring is in contact with the lower surface of the cross-shaped pressing plate, and the lower end of each third pressure spring is in contact with the inner surface of the bottom plate of the first supporting cavity;

the outer surface of the top plate of the first supporting cavity is provided with an electric push rod, and the movable end of the electric push rod can movably penetrate through the top plate of the first supporting cavity and the upper surface of the cross-shaped pressing plate to be in contact with each other.

8. The crawler-track type surface defect detecting apparatus for a crane boom according to claim 1, wherein: the upper surface of each track foot component is connected with at least one connecting seat, at least one third guide rod is arranged at the upper end of the connecting seat in a penetrating mode, the left side and the right side of the second supporting cavity extend downwards to form a first protruding cavity, the left side plate and the right side plate of the first protruding cavity at the same side are connected to the two ends of the third guide rod respectively, at least one second strip-shaped opening is formed in the bottom wall of the first protruding cavity, each connecting seat penetrates through the second strip-shaped opening and can move in the second strip-shaped opening, a fourth pressure spring is sleeved on the third guide rod, one end of the fourth pressure spring contacts the outer side plate in the left side plate and the right side plate of the first protruding cavity at the same side, and the other end of the fourth pressure spring contacts the outer side face in the left side face and the right side face of the upper end of the connecting seat at the same side.

9. The crane boom surface defect inspection apparatus of claim 8, wherein each of the crawler foot members comprises: a triangular upper fixed plate, a triangular lower fixed plate and a crawler belt, wherein the upper fixed plate and the lower fixed plate are oppositely arranged in parallel, and is connected through a support shaft, the connecting seat is connected with the upper fixing plate, three first limiting wheels are rotatably connected between the upper fixing plate and the lower fixing plate, and are respectively positioned at three corners of the upper fixing plate and the lower fixing plate, the crawler belt is wound outside the three first limiting wheels, a supporting plate is arranged between the upper fixing plate and the lower fixing plate in parallel, a group of second limiting wheels are respectively arranged at the four corners of the supporting plate, the second limiting wheel is contacted with the inner surface of the crawler belt, a first motor is arranged on the lower surface of the lower fixing plate, the output shaft of the first motor is sleeved with a driving wheel, the transmission belt is wound on the driving wheel and the driven wheel, and the driven wheel and the first limiting wheel are sleeved on the same rotating shaft.

10. The crawler-track type surface defect detecting apparatus for a crane boom according to claim 1, wherein: one end of each second supporting cavity facing the first supporting cavity is provided with a second protruding cavity, the first supporting cavity is connected with the second protruding cavity of each second supporting cavity, the left side plate and the right side plate of each second protruding cavity are respectively symmetrically provided with a third strip-shaped port, one end of each first connecting rod extends out of each third strip-shaped port and is connected with the upper end of a second connecting rod, the lower end of each second connecting rod is connected with a third limiting wheel, the other ends of the two first connecting rods corresponding to each second protruding cavity are respectively hinged with two opposite angles of a diamond-shaped connecting rod, the other two opposite angles of the diamond-shaped connecting rod are respectively hinged with a fixed seat and a second sliding block, the inner surface of the top plate of the second protruding cavity is connected with the fixed seat and a first motor fixing plate which are oppositely arranged, and a second motor is arranged on the first motor fixing plate, the output screw of the second motor penetrates through each second sliding block and then is connected with the fixed seat, the left side and the right side of the output screw of the second motor are respectively provided with a parallel light bar penetrating through each second sliding block, two ends of each light bar are respectively connected with the corresponding fixed seat and the first motor fixing plate, and the lower end of each second connecting rod is provided with a distance sensor.

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