WO2022083463A1

WO2022083463A1 - Magnetic adsorption-type steel bridge coating thickness inspection device

Info

Publication number: WO2022083463A1
Application number: PCT/CN2021/122945
Authority: WO
Inventors: 王贤强; 张建东; 郑洲; 刘朵; 杨羿; 谢利宝; 李虎; 何连海; 方太云; 季新年; 韩冬樱; 杨洋
Original assignee: 苏交科集团股份有限公司
Priority date: 2020-10-22
Filing date: 2021-10-11
Publication date: 2022-04-28
Also published as: CN112284234A; CN112284234B

Abstract

The present invention relates to the technical field of steel structure bridge coating inspection, and particularly to a magnetic adsorption-type steel bridge coating thickness inspection device. The device comprises: an inspection platform, a driving mechanism being provided on the inspection platform, the driving mechanism being used to drive the inspection platform to move forward or backward; an electromagnet, secured at the bottom of the inspection platform, the adsorption force of the electromagnet being used to secure the inspection platform at the bottom of a steel bridge or a side surface of a steel tower; a magnetic thickness measuring gauge, a main machine thereof and a data acquiring instrument being integrated on the inspection platform, and a probe of the magnetic thickness measuring gauge being in vertical contact with a surface of an inspected steel plate during inspection; and a linkage assembly, one end of which is connected to the driving mechanism, and the other end of which is connected to the probe of the magnetic thickness measuring gauge. The device is adsorbed on the surface of the steel beam or the steel tower by means of the electromagnet at the lower part of the inspection platform, without the need to provide a scaffold and use a bridge inspection vehicle, thereby saving time and labor, reducing the impact on road traffic.

Description

A magnetic adsorption type steel bridge coating thickness detection device

technical field

The invention relates to the technical field of coating detection of steel structure bridges, in particular to a magnetic adsorption type coating thickness detection device of steel bridges.

Background technique

Coating is the main measure for anti-corrosion of steel structure bridges. Coating film thickness is an important indicator for evaluating the anti-corrosion performance of coating. During the operation of steel structure bridges, the coating will occur under the action of moisture in the atmosphere, corrosive media and ultraviolet rays. Deterioration requires periodic inspection of the coating film thickness to evaluate its anti-corrosion performance.

In the prior art, for the detection of the coating film thickness of the steel bridge during the operation period, a bridge inspection vehicle is usually used to send the inspection personnel to the designated inspection area, and then a magnetic thickness gauge is held for inspection. However, the above methods are costly, time-consuming and labor-intensive, and have a great impact on road traffic. It is difficult to ensure the safety of personnel during the detection of high-rise steel bridge towers; and the detection area is artificially selected, which is highly subjective. It is difficult to achieve an overall objective evaluation of coating performance.

In view of the existence of the above-mentioned problems, the inventors actively conduct research and innovation based on years of rich practical experience and professional knowledge engaged in the engineering application of such products, in order to create a magnetic adsorption type steel bridge coating thickness detection device to make it more practical sex.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a magnetic adsorption type steel bridge coating thickness detection device, which improves the detection efficiency and the objectivity of the detection results, and reduces the influence on the road traffic.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a magnetic adsorption type steel bridge coating thickness detection device, comprising:

a detection platform, the detection platform is provided with a driving mechanism, and the driving mechanism is used to drive the detection platform to move forward or backward;

an electromagnet, fixed on the bottom of the detection platform, and the adsorption force of the electromagnet is used to fix the detection platform on the bottom of the steel bridge or the side of the steel tower;

A magnetic thickness gauge, the main unit of which is integrated with the data acquisition instrument and arranged on the detection platform, and the probe of the magnetic thickness gauge is in vertical contact with the surface of the steel plate to be detected during detection;

a linkage assembly, one end is connected with the driving mechanism, and the other end is connected with the probe of the magnetic thickness gauge;

Wherein, when the detection platform moves, the drive mechanism drives the linkage assembly to move, and the linkage assembly drives the probe of the magnetic thickness gauge to reciprocate in a direction perpendicular to the movement direction of the detection platform.

Further, the drive mechanism includes a wheel, a drive shaft connected to the wheel, and a motor, and the motor drives the drive shaft to rotate through a chain, thereby driving the wheel to rotate;

The detection platform also has a laser pulse generator, the laser pulse generator is arranged toward one of the wheels, and one of the wheels has a corresponding laser sensor.

Further, it also includes a data acquisition instrument, which is electrically connected to the laser sensor for calculating and recording the travel distance of the detection platform, the data acquisition instrument is integrated with a magnetic thickness gauge host, and is connected with the The magnetic thickness gauge probe is electrically connected, and is used to record the coating film thickness measured in the moving direction of the magnetic thickness gauge probe, and to calculate the coordinates of the film thickness deterioration area.

Further, a limiter is provided on the detection platform, and the T-bar for fixing the probe of the magnetic thickness gauge can be relatively slidably arranged on the limiter.

Further, the linkage assembly includes a gear commutator connected with the output shaft of the motor, an L-shaped rotating shaft connected with the output shaft of the gear commutator, and a pusher rotatably connected with the L-shaped rotating shaft. When the L-shaped rotating shaft rotates, the push rod drives the probe of the magnetic thickness gauge to reciprocate through the T-shaped rod.

Further, the probe of the magnetic thickness gauge is embedded in the vertical sleeve at the lower part of the T-bar, and the vertical sleeve is provided with a compression spring connected with the probe, and the compression spring is used to hold the probe. Contact pressure with the surface of the steel plate.

Further, the data acquisition instrument determines the marginal coordinates of the film thickness deterioration area according to the thickness value scanned by the magnetic thickness gauge, and encloses the marginal coordinates into a visual closed area.

Further, the data acquisition instrument calculates the volume of paint that needs to be supplemented in the enclosed area according to the enclosed area enclosed by the marginal coordinates of the film thickness deterioration area and the film thickness of each location in the enclosed area.

Further, the limiting member is a rectangular plate, and the rectangular plate is provided with a word hole, and the contact surface between the T-bar and the word hole is a rectangle, so as to prevent the angle of the probe from rotating during the movement process. .

The beneficial effects of the invention are as follows: the electromagnetic device at the lower part of the detection platform is adsorbed on the surface of the steel beam or the steel tower, and the wheels are driven by the driving wheel, so that the height of the steel bridge tower and the span movement of the steel beam can be realized, which is simple and convenient, and does not need to set up scaffolding and use The bridge inspection vehicle saves time and effort, reduces the impact on the road traffic, and avoids the safety risk of personnel when the towering steel tower is inspected.

The motor drives the platform to move forward, and the magnetic thickness measuring probe is moved back and forth in the lateral direction through the gear commutator and the eccentric connecting rod. The platform advancement and the lateral reciprocating movement of the probe are superimposed to generate a sinusoidal detection scanning path, which improves the objectivity and efficiency of the detection area selection. Check coverage area.

The laser pulse generator emits laser pulses to the rear wheel, and the wheel is equipped with a laser sensor. The laser sensor rotates with the wheel and receives a laser pulse signal once per revolution, so as to realize the marking of the moving distance of the detection device and collect the corresponding position at the same time. According to the magnetic thickness measurement results, the coordinate relationship between the coating film thickness and the position can be obtained, and the positioning function of the film thickness deterioration area can be realized.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a magnetic adsorption type steel bridge coating thickness detection device in an embodiment of the present invention;

Fig. 2 is the bottom view of the magnetic adsorption type steel bridge coating thickness detection device in the embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection structure of the probe position of the magnetic thickness gauge in the 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 only a part of the embodiments of the present invention, but not all of the embodiments.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in Figures 1 to 3, the magnetic adsorption type steel bridge coating thickness detection device includes a detection platform 1, an electromagnet 11, a magnetic thickness gauge and a linkage assembly, wherein:

The detection platform 1 has a driving mechanism, and the driving mechanism is used to drive the detection platform 1 to move forward or backward; the driving mechanism here refers to a mechanism that drives the entire detection platform 1 forward or backward, and is driven by a motor wheel set in the embodiment of the present invention.

The electromagnet 11 is fixed at the bottom of the detection platform 1, and the adsorption force of the electromagnet 11 is used to fix the detection platform 1 at the bottom of the steel bridge or the side of the steel tower; since the detection object is the steel bridge deck or the steel tower, it is necessary to install the steel bridge deck on the steel bridge deck. The bottom or the side wall of the steel tower moves. In order to ensure that the detection platform 1 can be reliably fixed on the steel bridge deck or the steel tower and not fall off, a magnetic connection is adopted in the embodiment of the present invention, that is, when the electromagnet 11 is energized, a strong Magnetic, so that the detection platform 1 is magnetically adsorbed on the steel bridge deck or steel tower. With this arrangement, the detection vehicle in the prior art is omitted, and the interference to the road is reduced.

The main body of the magnetic thickness gauge and the data acquisition instrument 16 are integrated on the detection platform 1, and the probe 14 of the magnetic thickness gauge is in vertical contact with the surface of the steel plate to be tested during detection; the working principle of the magnetic thickness gauge is the principle of magnetic induction, which is The thickness of the coating is measured by the size of the magnetic flux that the probe 14 passes through the non-ferromagnetic coating and flows into the iron substrate. When a difference in coating thickness is detected, especially when the coating thickness becomes thinner, it can be determined that the coating thickness here is deteriorated, and the coating needs to be repainted.

One end of the linkage assembly is connected with the driving mechanism, and the other end is connected with the probe 14 of the magnetic thickness gauge;

When the detection platform 1 moves, the driving mechanism drives the linkage assembly to move, and the linkage assembly drives the probe 14 of the magnetic thickness gauge to reciprocate in a direction perpendicular to the movement direction of the detection platform 1 .

In the specific thickness detection, starting from one end of the steel beam or steel tower, the driving mechanism drives the linear movement of the detection platform 1, and the linkage assembly drives the probe 14 of the magnetic thickness gauge to reciprocate under the driving of the driving mechanism. It constitutes a sine scan, which improves the objectivity of detection and reduces the obstruction to traffic compared with the prior art; in addition, through the connection between the linkage component and the driving mechanism, it is possible to use one driving mechanism to drive two mechanisms to act synchronously , which saves drive control resources; and because of the setting of the linkage assembly, the detection mechanism and the magnetic thickness detector act synchronously, preventing the occurrence of unsynchronized driving or detection, and improving the reliability and accuracy of detection.

Specifically, as shown in FIG. 1 , the drive mechanism includes a wheel 3 , a drive shaft 4 connected to the wheel 3 , and a motor 2 . The motor 2 drives the drive shaft 4 to rotate through the chain 5 , thereby driving the wheel 3 to rotate.

The detection platform 1 also has a laser pulse generator 12 . The laser pulse generator 12 is disposed toward one of the wheels 3 , and one of the wheels 3 has a corresponding laser sensor 13 . The laser sensor 13 rotates with the wheel 3, and the wheel 3 receives a laser pulse signal every time it rotates, so that the number of rotations of the wheel 3 can be calculated.

In the embodiment of the present invention, a data acquisition instrument 16 is further included, and the data acquisition instrument 16 is electrically connected to the laser sensor 13 for calculating and recording the travel distance of the detection platform 1. The data acquisition instrument 16 is integrated with the magnetic thickness gauge mainframe, It is electrically connected to the magnetic thickness gauge probe 14, and is used for recording and detecting the coating film thickness measured in the moving direction of the magnetic thickness gauge probe 14, and calculating the coordinates of the film thickness deterioration area. The data acquisition instrument 16 has a calculation function. According to the number of rotations of the wheel 3, the coordinates along the moving direction of the detection platform 1 can be calculated, and the coordinates of the film thickness deterioration point can be calculated according to the change of the coating thickness. The specific position coordinates of the film thickness deterioration area are obtained, so as to facilitate the repair of the film thickness deterioration point in the later stage.

Regarding the reciprocating movement of the magnetic thickness gauge probe 14 , as shown in FIG. 1 , the detection platform 1 is provided with a limiter 10 , and the T-bar 9 for fixing the magnetic thickness gauge probe 14 can be relatively slidably arranged on the limiter 10 on. It should be pointed out here that the limiting member 10 may be a lateral sliding groove provided on the vertical plate as shown in the figure, or may be the movement of the slide rail. In this embodiment, as shown in FIG. 1 , the limiting member 10 is a rectangular plate, and the length direction of the rectangular plate is parallel to the reciprocating movement direction of the probe 14 , and a character hole is arranged in the rectangular plate, and the T-bar 9 is connected to the The contact surface of the slotted hole is rectangular to prevent the angle of the probe from rotating during the movement. One end of the T-shaped rod 9 in contact with the push rod 8 is provided with a rotating shaft, and the one in contact with the slotted hole is provided with a rectangular shape.

Further, the linkage assembly includes a gear commutator 6 connected with the output shaft of the motor 2, an L-shaped rotating shaft 7 connected with the output shaft of the gear commutator, and a push rod 8 rotatably connected with the L-shaped rotating shaft 7. When the L-shaped rotating shaft 7 rotates, the push rod 8 drives the magnetic thickness gauge probe 14 to reciprocate through the T-shaped rod 9 . In this embodiment, a vertical rotating pin is arranged on the short vertical rod section of the L-shaped rotating shaft 7, and the push rod 8 is rotatably connected with the rotating pin. When the L-row rotating shaft rotates with the long horizontal rod as the rotating shaft, the push rod 8 The rotating end of the T-bar rotates following the rotation of the rotating pin, thereby promoting the reciprocating movement of the push rod 8, thereby driving the reciprocating movement of the magnetic thickness detector probe 14 through the T-shaped rod 9. It should be pointed out here that the magnetic thickness measuring probe 14 is embedded in the lower vertical sleeve of the T-bar 9, as shown in FIG. It is rectangular, so that the probe 14 is in vertical contact with the detection surface, and angular rotation is avoided. Moreover, through this arrangement, only one motor is used to synchronously drive the movement of the detection platform 1 and the reciprocating motion of the probe 14 , thereby improving the utilization rate of the driving resources and ensuring the detection accuracy. In addition, it should also be pointed out here that in the embodiment of the present invention, the host (not shown in the figure) of the magnetic thickness gauge is integrated with the data acquisition instrument 16 as a whole, and is electrically connected with the magnetic thickness gauge probe 14 to realize film thickness measurement .

In the embodiment of the present invention, in order to ensure the measurement accuracy, the probe 14 is in contact with the steel bridge deck. Specifically, as shown in FIG. 3 , the magnetic thickness gauge probe 14 is embedded in the vertical sleeve at the lower part of the T-bar 9 Inside, a compression spring 15 connected to the probe 14 is arranged in the vertical sleeve, and the compression spring 15 is used to maintain the contact pressure between the probe 14 and the surface of the steel plate. Here, in order to reduce the damage to the probe 14 or the steel bridge deck during the moving process, the circumference of the bottom of the probe 14 may be rounded.

In the embodiment of the present invention, when the film thickness deterioration area is large and exceeds the scanning range of the magnetic thickness gauge for one movement, the closed area calculation method is adopted, that is, the data acquisition device 16 scans according to the magnetic thickness gauge probe 14 The thickness value of , determines the marginal coordinates of the film thickness deterioration area, and encloses the marginal coordinates into a visual closed area. It should be pointed out here that a display screen is provided on the data acquisition instrument 16 to display the enclosed area, so as to achieve the purpose of visualization.

In order to further accurately calculate the amount of paint required, in the embodiment of the present invention, the data acquisition device 16 calculates the closed area enclosed by the marginal coordinates of the film thickness deterioration area and the film thickness of each place in the closed area. The volume of paint that needs to be replenished in the enclosed area. Through this setting, it is more convenient for later maintenance to achieve the purpose of saving resources.

Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims

A magnetic adsorption type steel bridge coating thickness detection device, characterized in that it includes:

a detection platform, the detection platform is provided with a driving mechanism, and the driving mechanism is used to drive the detection platform to move forward or backward;

an electromagnet, fixed on the bottom of the detection platform, and the adsorption force of the electromagnet is used to fix the detection platform on the bottom of the steel bridge or the side of the steel tower;

A magnetic thickness gauge, the main unit of which is integrated with the data acquisition instrument and arranged on the detection platform, and the probe of the magnetic thickness gauge is in vertical contact with the surface of the steel plate to be detected during detection;

a linkage assembly, one end is connected with the driving mechanism, and the other end is connected with the probe of the magnetic thickness gauge;

Wherein, when the detection platform moves, the drive mechanism drives the linkage assembly to move, and the linkage assembly drives the probe of the magnetic thickness gauge to reciprocate in a direction perpendicular to the movement direction of the detection platform.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 1, wherein the drive mechanism comprises a wheel, a drive shaft connected to the wheel, and a motor, and the motor drives the drive shaft through a chain rotate, thereby driving the rotation of the wheel;

The detection platform also has a laser pulse generator, the laser pulse generator is arranged toward one of the wheels, and one of the wheels has a corresponding laser sensor.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 2, further comprising a data acquisition instrument, the data acquisition instrument is electrically connected to the laser sensor for calculating and recording the detection The travel distance of the platform, the data acquisition instrument is integrated with the magnetic thickness gauge host, used to record the coating film thickness measured in the moving direction of the magnetic thickness gauge probe, and match the measured travel distance to calculate the film thickness The coordinates of the degraded area.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 3, wherein the detection platform is provided with a limiter, and the T-bar fixing the probe of the magnetic thickness gauge can be relatively slidably arranged on the said detection platform. on the limiter.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 4, wherein the linkage assembly comprises a gear commutator connected with the output shaft of the motor, and an output of the gear commutator. an L-shaped rotating shaft connected to the shaft and a push rod rotatably connected with the L-shaped rotating shaft. When the L-shaped rotating shaft rotates, the push rod drives the magnetic thickness gauge probe to reciprocate through the T-shaped rod sports.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 5, wherein the magnetic thickness gauge probe is embedded in the lower vertical sleeve of the T-bar, and the vertical sleeve is A compression spring connected to the probe is arranged inside, and the compression spring is used to maintain the contact pressure between the probe and the surface of the steel plate.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 3, wherein the data acquisition instrument determines the marginal coordinates of the film thickness deterioration area according to the thickness value scanned by the magnetic thickness gauge, and calculates the marginal coordinates of the film thickness deterioration area. The coordinates enclose a visual closed area.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 7, wherein the data acquisition device is based on the closed area enclosed by the marginal coordinates of the film thickness deterioration area, and the parts in the closed area. Film thickness, calculate the volume of paint that needs to be replenished in the enclosed area.
The magnetic adsorption type steel bridge coating thickness detection device according to claim 4, wherein the limiting member is a rectangular plate, a character hole is provided in the rectangular plate, and the T-bar is connected to the one. The contact surface of the word hole is rectangular to prevent the angle of the probe from rotating during the movement.