KR102359624B1 - Quality inspection device for internal welding part of water supply pipe - Google Patents

Abstract

In accordance with the present invention, an apparatus for inspecting the quality of an inner welding part of a water supply pipe includes: a pair of pillars controlled by a controller to be adjusted in length, and spaced a predetermined apart from each other to be tightly fixed to an inner circumference surface of the inner welding part; a first rod connecting the pair of pillars, and installed to be rotatable by a first motor at a constant speed; a body surrounding the outer surface of the first rod, and installed to be movable to one side or the other side in a longitudinal direction of the first rod; a second rod having a scanner provided at one end, and installed on one side of the body, while being adjustable in length; and an angle adjustor adjusting an angle at which the scanner comes in contact with the outer surface of the inner welding part such that the scanner can come in tight contact vertically with the outer surface of the inner welding part. The scanner is an ultrasonic probe transmitting or receiving ultrasonic waves, the second rod is controlled by the controller to be adjusted in length to bring the scanner into tight contact with the outer surface of the inner welding part, and the first rod is rotated in one direction to lead the body and the second rod to be rotated together and the scanner is rotated along the outer surface of the inner welding part to nondestructively inspect the welding condition of the inner welding part with ultrasonic waves.

Description

Quality inspection device for internal welding part of water supply pipe

The present invention relates to a quality inspection apparatus for internal welding of a water supply pipe.

[Project unique number] D202086

[Buddha] Gyeonggi-do

[Research Management Specialized Institution] Gyeonggi-do Economic Science Promotion Agency

[Research project name] Startup R&D

[Research project name] Development of smart non-destructive inspection solution for cylindrical structures using previous defense industry technology

[Supervised Research Institution] Cookie

[Research period] 2020.03.01~2021.02.28

Steel pipe lap welding is mainly used as a welding method to connect two water supply pipes with a large diameter, and non-destructive testing is mainly used to inspect the quality and condition of the welded part of the water supply pipe by this steel pipe lap welding joint.

Non-destructive inspection is a method of inspecting a workpiece without modifying the product integrity or surface condition. Penetration inspection method, magnetic particle inspection method, ultrasonic inspection method, radiographic inspection method, eddy current inspection method, leak inspection method, etc. It is used to observe defects.

In the past, radiographic inspection was mainly used as a non-destructive inspection method for inspecting welded parts of water supply pipes by overlapping welding joints of steel pipes. there is a situation.

Therefore, penetrant inspection and magnetic particle inspection are used for non-destructive inspection of welded parts of water supply pipes due to overlapping welding of steel pipes. have.

In addition, in order to non-destructively inspect the welding state of the internal welded part of the water supply pipe, the inspector must carry the inspection device to enter the water pipe. However, there is a problem in that it is inconvenient to inspect the welding state of the internal welded part because the normal water supply pipe is often not manufactured with a width sufficient to enter and exit easily with the inspector possessing an inspection device.

The present invention is to solve the problems of the prior art, and to provide an apparatus for inspecting the quality of the internal welding part of a water supply pipe by overlap welding of steel pipe with improved reliability and convenience using ultrasonic waves.

a first water pipe located above the two water pipes connected by a steel pipe overlap welding joint; a second water pipe located at the bottom of the two water pipes; an external welding portion formed by welding an upper surface of the second water supply pipe and one end surface of the first water supply pipe; and an inner weld formed by welding the other end surface of the second water pipe and the lower surface of the first water pipe. a pair of pillars controlled by a control device, adjustable in length, spaced apart from each other by a predetermined distance, and installed in close contact with the inner circumferential surface of the inner welding part; a first rod connecting the pair of pillars and rotatably installed at a constant speed by a first motor; a body surrounding the outer surface of the first rod and installed to be movable on one side or the other side along the longitudinal direction of the first rod; a second rod having a scanning device at one end and installed on one side of the main body, the length of which can be adjusted; and an angle adjusting device for adjusting an angle at which the scanning device is in close contact with the outer surface of the inner welded part so that the scanning device can be in close contact with the outer surface of the inner welded part vertically.

In addition, controlled by the control device, the length of the second rod is adjusted to bring the scanning device into close contact with the outer surface of the inner welding part, and as the first rod is rotated in one direction, the main body and the second rod are rotated together While the scanning device rotates along the outer surface of the inner welded portion, it is possible to inspect the welding state of the inner welded portion.

In addition, a contact member made of a rubber material may be provided at both ends of each of the pair of pillars.

In addition, a first spring that is an elastic body may be provided between the contact member and both ends of each of the pair of pillars.

In addition, each of the pair of pillars is divided into a first pillar, a joint portion and a second column, and both ends of the joint portion are open so that the upper portion of the first column and the lower portion of the second column can be inserted, the joint At least one second motor controlled by a control device is provided inside the unit, and when the second motor rotates in one direction, the upper portion of the first pillar and the lower portion of the second pillar enter the inside of the joint, respectively, and the pillar is reduced, and when the second motor rotates in the other direction, the upper portion of the first column and the lower portion of the second column may extend to the outside of the joint, thereby increasing the length of the column.

In addition, the first motor includes a second gear provided inside one side of the first rod, one side provided with a plurality of first protrusions formed to be spaced apart from each other at a predetermined distance on the outer surface of the first rod. A plurality of second protrusions inserted into the space between the first protrusions are formed on the inner surface, and when the first motor rotates in one direction or the other under control by the control device, as the second gear rotates together While the first protrusion and the second protrusion rotate in an engaged state, the first rod may also rotate in one direction or the other.

In addition, a plurality of recessed grooves are formed on the outer surface of the first rod at regular intervals along the longitudinal direction of the first rod, and a third motor for generating a driving force is provided inside the main body, and the The third motor includes a third gear spaced apart at a predetermined distance so as to be insertable into the plurality of grooves on the outer surface, and provided with a plurality of insertion portions protruding and formed, and is controlled by the control device so that the third motor is When rotating in one direction or the other direction, the main body may move in one direction or the other direction along the first rod while entering or exiting the groove while the insertion part rotates together.

In addition, one side of the main body includes a length adjusting member having one side open so that the second rod can enter or leave, and a fourth motor is controlled by the control device to generate a driving force inside the length adjusting member. provided, controlled by the control device, and when the four motors rotate in one direction, the lower portion of the second rod enters the inside of the length adjusting member, and is controlled by the control device to rotate the fourth motor in the other direction When the lower portion of the second rod may go out to the outside of the length adjusting member.

In addition, a second spring that is an elastic body may be further provided between the scanning device and the second rod.

In addition, the angle adjusting device may be provided between the second spring and the scanning device.

In addition, the scanning device is an ultrasonic probe capable of transmitting or receiving ultrasonic waves, and the ultrasonic probe may transmit ultrasonic waves while forming a predetermined angle with the outer surface of the inner welding part.

In addition, one end of the second rod may include a photographing device that is controlled by the control unit to capture an image in a direction in which the scanning device is installed.

According to the apparatus for inspecting the quality of the internal welded part of the water supply pipe according to the present invention, the convenience of the inspection of the internal welded part is improved, and there is an effect that the quality inspection of the internal welded part of the water supply pipe is easily possible.

In addition, there is an effect of enabling the quality inspection of highly reliable internal welding parts of water supply pipes in a non-destructive way using ultrasonic waves.

1 is a view showing a welding portion of a water supply pipe connected by a steel pipe overlap welding welding method.
Figure 2 is a view showing a quality inspection apparatus of the inner welded water pipe according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a state in which the quality inspection device of the internal welded part of the water supply pipe is installed inside the water supply pipe to inspect the welding quality of the internal welded part according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments are intended to completely inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention. It is provided for the purpose, and matters obvious to those of ordinary skill in the art of the present invention may be omitted. In addition, the same reference numerals refer to the same members throughout each embodiment. On the other hand, each component shown in the drawings may have an exaggerated thickness or dimension for convenience of description, and does not mean that it should actually be configured in a ratio between the corresponding dimensions or components.

1 is a view showing a welding portion of a water supply pipe connected by a steel pipe overlap welding welding method.

Referring to Figure 1, the first water supply pipe (10) located above the two water supply pipes connected by the steel pipe overlap welding joint, the second water supply pipe (20) located at the bottom of the two water supply pipes, the second An external welded portion 11 formed by welding the upper surface of the second water supply pipe 20 and one end surface of the first water supply pipe 10 and the other end surface of the second water supply pipe 20 and the first water pipe 10 ) includes an inner welded portion 21 formed by welding the lower surface.

In order to non-destructively inspect the welding state of the internal welding part, the inspector must enter the water supply pipe with an inspection device. However, since there are many cases where the water supply pipe is not made wide enough for the inspector to have an inspection device to easily enter and exit, it is inconvenient to inspect the welding condition of the internal welded part.

The present invention is devised to solve this problem, and FIG. 2 is a view showing a quality inspection device of a welding part inside a water supply pipe according to an embodiment of the present invention, and FIG. 3 is a view inside the water pipe according to an embodiment of the present invention. It is a cross-sectional view showing the state that the welding quality inspection device is installed inside the water supply pipe to inspect the welding quality of the internal welding part.

Referring to FIGS. 2 and 3 , the apparatus for inspecting the internal welding part of a water supply pipe according to an embodiment of the present invention includes a pair of pillars 110 , a first rod 120 , a main body 130 , and a second rod 140 . ), a scanning device 160 , an angle adjusting device 190 and a control device 200 .

The pair of pillars 110 are controlled by the control device 200 so that the length can be adjusted, and they are spaced apart from each other by a predetermined distance to be installed in close contact with the inner circumferential surface of the inner welding part.

For length adjustment, each of the pair of pillars 110 is divided into a first pillar 1101, a joint 1103 and a second pillar 1104, and the first pillar 1101 and the second pillar 1104 ) can be adjusted by increasing or decreasing the length of the column 110 as it enters or exits the interior of the joint 1103 .

To this end, both ends of the joint 1103 are opened so that the upper part of the first column 1101 and the lower part of the second column 1104 can be inserted, and the control device 200 is located inside the joint 1103 . At least one or more second motors 113 controlled by

When the second motor 113 for generating a driving force rotates in one direction, the upper portion of the first column 1101 or the lower portion of the second column 1104 enters the joint 1103 and the column 110 is reduced, and when the second motor 113 rotates to the other side, the upper portion of the first column 1101 or the lower portion of the second column 1104 goes out of the joint 1103 and the column The length of (110) may be increased.

Specifically, the length adjustment of the pillar 110 is a first gear 1131 provided in each of the at least one or more second motors 113 , and a first screw thread 1132 formed on an outer surface of the first gear 1131 . , a second screw thread 1102 formed on the inner surface of the first column 1101 and a third screw thread 1105 formed on the inner surface of the second column 1104 . At this time, the upper side of the first pillar 1101 and the lower side of the second pillar 1104 are opened so that the second motor 113 can be inserted, and the second screw thread 1102 and the third screw thread 1105 are opened. ) may abut against the first screw thread 1132 formed on the first gear 1131 . When the second motor 113 is controlled by the control device 200 to rotate in one direction, the first screw thread 1132 moves in one direction with the second screw thread 1102 and the third screw thread 1105 in contact with each other. While rotating, the first pillar 1101 or the second pillar 1104 enters the inside of the joint 1103 so that the length of the pillar 110 can be reduced, and is controlled by the control device 200 to When the second motor 113 rotates in the other direction, the first screw thread 1132 rotates in the other direction while the second screw thread 1102 and the third screw thread 1105 come into contact with the first pillar 1101. Alternatively, the second pillar 1104 may extend to the outside of the joint 1103 to increase the length of the pillar 110 .

That is, when the second motor 113 and the first screw thread 1132 are controlled by the control device 200 to rotate, the second screw thread 1102 and the third screw thread 1105 are the first screw thread 1132 . It is possible to adjust the length of the pillar 110 while riding up or down.

Through this, it is possible to fix the quality inspection device for the internal welding part of the water supply pipe of the present invention in the inside of the water supply pipe having various diameters.

At this time, the first rod 120 connecting the pair of pillars 110 is preferably maintained horizontally. For this purpose, although not shown in the drawings, the first rod 120 and the pillar 110 . A horizontal adjustment device 210 may be further provided therebetween.

The leveling device 210 can measure whether the first rod 120 is maintained horizontally, and the inspector includes a receiving device that receives and displays data transmitted from the separate leveling device 210 , The horizontal state of the first rod 120 can be checked, and if the horizontal is not maintained, the first rod 120 can be leveled by adjusting the height of the pillar 110 through the control device 200 . have.

In addition, since the joint 1103 is provided, the first column 1101 and the second column 1104 absorb vibrations generated when entering or coming out of the joint 1103 to the column 110 . It is possible to prevent vibration of the water supply pipe of the present invention, it is possible to improve the durability of the internal weld quality inspection device.

In addition, a contact member 111 made of a rubber material may be further provided at both ends of each of the pair of pillars 110 , and an elastic body is disposed between the respective ends of the contact member 111 and the pair of pillars 110 . A phosphor first spring 112 may be further provided.

The contact member 111 provided at both ends of each of the pair of pillars 110 as the length of each of the pillars 110 is increased or decreased by being controlled by the control device 200 is the second water pipe 20 ), and as the first spring 112 is compressed, the adhesion between the contact member 111 and the inner surface of the second water pipe 20 is improved to increase the fixing force, and It is possible to prevent the second water pipe 20 and the quality inspection device of the water pipe internal welding of the present invention from being damaged.

At this time, the contact member 111 has a trapezoidal cross-section, and the cross-sectional area of the portion in contact with the inner surface of the second water supply pipe 20 is larger than the cross-sectional area of the other portion opposite to the portion in contact with the inner surface.

As the contact member 111 has a trapezoidal cross-section as described above, the contact area between the second water pipe 20 and one surface of the contact member 111 is further increased, so that the adhesion and fixing force are improved. do.

The first rod 120 connects a pair of pillars 110 , and is rotatably installed at a constant speed by a first motor 121 . The first motor 121 may be provided inside one side of the first rod 120 , and includes a second gear 122 .

The second gear 122 is provided with a plurality of first protrusions 1221 formed to be spaced apart from each other at regular intervals on the outer surface, and between the plurality of first protrusions 1221 on the inner surface of the first rod 120 . A second protrusion 123 to be inserted into the space may be formed.

When the first motor 121 is controlled by the control device 200 to rotate in one direction or the other direction, as the second gear 122 rotates together, the first protrusion 1221 and the second protrusion As the 123 rotates in the engaged state, the first rod 120 also rotates in one direction or the other.

In addition, as shown in FIG. 2 , the main body 130 surrounds the outer surface of the first rod 120 , and is installed to be movable on one side or the other side along the longitudinal direction of the first rod 120 .

A plurality of recessed grooves 124 are formed on the outer surface of the first rod 120 at regular intervals along the longitudinal direction of the first rod 120 , and a driving force is applied to the inside of the main body 130 . A third motor 131 for generating is provided, and the third motor 131 is spaced apart from each other at a predetermined interval so as to be insertable into the plurality of grooves 124 on the outer surface, and a plurality of insertion portions 1321 protrudingly formed. ) includes a third gear 132 that is provided.

When the third motor 131 is controlled by the control device 200 to rotate in one direction or the other direction, the insertion part 1321 rotates together and enters or exits the groove 124 while the main body 130 is rotated. may move in one direction or the other along the first rod 120 .

In addition, the apparatus for inspecting the quality of the internal welding part of the water supply pipe according to an embodiment of the present invention is provided on one side of the main body 130 and the second rod 140 moves together with the main body 130 according to the movement of the main body 130 . ) can be installed.

The second rod 140 is adjustable in length, and a scanning device 160 is provided at one end. In order to adjust the length of the second rod 140, one side of the main body 130 includes a length adjusting member 133 having an open side so that the second rod 140 can enter or exit.

A fourth motor 1331 that is controlled by the control device 200 to generate a driving force may be provided inside the length adjusting member 133 .

Controlled by the control device 200 , when the four motors rotate in one direction, the lower portion of the second rod 140 may enter the length adjusting member 133 , and the control device 200 may When the fourth motor 1331 rotates in the other direction by being controlled by the , the lower portion of the second rod 140 may go out of the length adjusting member 133 .

Specifically, the fourth motor 1331 includes a fourth gear 1332 having a fourth screw thread 1333 formed on an outer surface thereof, and the fourth motor 1331 is located on the lower side of the second rod 140 . Can be inserted inside.

To this end, the lower side of the second rod 140 is opened so that the fourth motor 1331 can be inserted, and the inner surface of the second rod 140 has a fifth screw thread in contact with the fourth screw thread 1333 ( 141) is formed.

When the fourth motor 1331 is controlled by the control device 200 and rotates in one direction, the fourth screw thread 1333 and the fifth screw thread 141 come into contact with each other and rotate in one direction together with the second rod ( 140) can enter the inside of the length adjustment member 133, and is controlled by the control device 200, when the fourth motor 1331 rotates in the other direction, the fourth screw thread 1333 and the fifth screw thread The second rod 140 may go out of the length adjusting member 133 while rotating in the other direction while contacting the 141 .

The second rod 140 is controlled by the control device 200 so that the main body 130 is movable in the longitudinal direction of the first rod 120 and the second rod 140 is adjustable in length. The scanning device 160 installed at one end of the can be accurately positioned on the outer surface of the inner weld to inspect the quality of the weld.

In addition, as the first rod 120 can be rotated under the control of the control device 200 , the scanning device 160 has an inner welded portion 21 formed along the inner wall of the second water supply pipe 20 . can be inspected, the convenience of inspection work can be improved.

The second rod 140 may further include a photographing device 170 controlled by the control device 200 to capture an image in a direction in which the scanning device 160 is installed. As the photographing device 170 is provided at one end of the second rod 140 and controlled by the control device 200, the examiner displays an image or photo photographed by the photographing device 170 separately provided outside. Through the display device 220, it is possible to visually observe the state of the internal welding part, and it is possible to observe whether the scanning device 160 is properly positioned on the outer surface of the internal welding part, and by operating the control device 200, the By controlling the first rod 120 , the main body 130 , and the second rod 140 , the position where the scanning device 160 comes into contact with the outer surface of the inner welding part can be precisely adjusted.

In addition, although not shown in the drawings, the photographing device 170 may further include an LED light source 180 that brightly illuminates the photographing portion. By including the light source 180, the photographing device 170 can clearly photograph the outer surface of the inner welding part even in the dark inside of the water supply pipe.

The scanning device 160 may be an ultrasonic probe 161 capable of transmitting or receiving ultrasonic waves, and the ultrasonic probe 161 may transmit ultrasonic waves in a direction perpendicular to the outer surface of the inner welding part. The ultrasonic transducer 161 may have a built-in vibrator therein to transmit an ultrasonic wave and receive a reflected wave of the transmitted ultrasonic wave. At this time, although not shown in the drawing, an ultrasonic transducer 161 and an ultrasonic pulser that sends a desired pulse to the ultrasonic probe 161 as a signal, and a receiver that receives and amplifies the signal received from the ultrasonic probe 161 ( receiver), a data conversion unit that converts analog data collected through the receiver into digital data, and a welding site based on data such as the amplitude of the ultrasonic wave converted by the data conversion unit and the position of the ultrasonic probe 161 A device for displaying an image of the test result may be separately provided.

As for the water supply pipe, a coated steel pipe for water supply having a standard of KSD 3589 and a standard type of STWW400 may be used. desirable.

The frequency of ultrasonic waves used in non-destructive testing using ultrasonic waves is usually 0.5 MHz to 15 MHz, but in precision thickness measurement ultrasonic microscopes, 100 MHz or more and 1 GHz are also used.

At this time, if the frequency of the ultrasonic wave is low, the ultrasonic wave is transmitted far, but the resolution is lowered. When the frequency of the ultrasonic wave is high, on the contrary, the resolution is improved but the ultrasonic wave cannot be transmitted far. In non-destructive testing, it is important to set the frequency of ultrasonic waves suitable for the object to be inspected.

Preferably, the frequency of the ultrasonic wave transmitted from the ultrasonic probe 161 according to an embodiment of the present invention is adjusted to a frequency of 1 to 10 MHz.

In this case, the frequency and speed of the ultrasonic wave transmitted from the ultrasonic probe 161 may be set through the control device 200 .

In the water supply pipe inner weld quality inspection apparatus according to an embodiment of the present invention, the ultrasonic probe 161 is configured to transmit ultrasonic waves in a direction perpendicular to the outer surface of the inner welded portion. The ultrasonic probe 161 may further include an angle adjusting device 190 for adjusting the angle at which the ultrasonic probe 161 is in close contact with the outer surface of the inner welding portion to form an angle.

A second spring 150 that is an elastic body may be further provided between the scanning device 160 and the second rod 140 , and the second spring 150 prevents movement of the second rod 140 by the second spring 150 . Accordingly, the ultrasonic transducer 161 can absorb the vibration and shock generated when the inner surface of the second water pipe 20 comes into contact with the outer surface of the inner welded part, thereby improving the durability of the quality inspection apparatus of the inner welded part of the water supply pipe of the present invention. In addition, it is possible to prevent damage to the ultrasonic probe 161 as well.

The angle adjusting device 190 is provided between the second spring 150 and the scanning device 160 , and may be controlled by the control device 200 . Because the angle adjusting device 190 is provided, the ultrasonic wave is transmitted from the lower surface of the second water supply pipe 20 toward the inner welding part 21 at a certain angle, and a reflected signal (not shown) according to the transmitted ultrasonic wave is provided. , R1) can be received.

Ultrasound is used to inspect the quality of the inner welded part of the water supply pipe, and the ultrasonic probe 161 can adjust the contact angle of the inner welded part by using the angle adjusting device 190. Compared to the non-destructive test by radiation, Because there is no possibility of exposure, safe and reliable quality inspection of internal welds is possible.

Although not shown in the drawing, the control device 200 is the pillar 110 , the first rod 120 , the main body 130 , the second rod 140 , the angle adjusting device 190 , and the photographing device 170 ). It may be a terminal, such as a PC or a smartphone, which is separately provided outside by being wired or wirelessly connected to the . The control device 200 is connected to one configuration of the present invention by wire or wirelessly, and the inspector can use the control device 200 from the outside of the water supply pipe to perform a quality inspection of the inner welded part of the water supply pipe, so that the quality of the welding part is inspected. Convenience may be improved.

The water supply pipe internal welding part quality inspection apparatus according to an embodiment of the present invention may be located near the internal welding part 21 to be inspected for quality inside the water supply pipe by an inspector at first, but using a separate transfer device, the inside of the water supply pipe may be moved to

In the water supply pipe internal welding part quality inspection apparatus according to an embodiment of the present invention, the second rod 140 is length-adjusted by being controlled by the control device 200 to attach the scanning device 160 to the outer surface of the internal welding part. As the first rod 120 is rotated in one direction, the main body 130 and the second rod 140 are rotated together and the scanning device 160 rotates along the outer surface of the inner welded part. Because the welding state can be inspected, the convenience of inspection work is improved, so that not only the quality inspection is possible for the inner welded part 21 of the water supply pipe, but also the highly reliable inner welded part of the water supply pipe using ultrasonic waves in a non-destructive way 21), quality inspection is possible.

In the above description, preferred embodiments of the present invention have been presented and described, but the present invention is not necessarily limited thereto, and those of ordinary skill in the art to which the present invention pertains within the scope not departing from the technical spirit of the present invention. It will be readily appreciated that many substitutions, modifications, and alterations are possible.

10: first water supply pipe 11: external welding part
20: second water supply pipe 21: internal welding part
100: quality inspection device for internal welding of water supply pipe 110: column
120: first rod 130: body
140: second rod 150: second spring
160: scanning device 161: ultrasonic probe

Claims (11)

a first water pipe located at the top of the two water pipes connected by a steel pipe overlap welding joint;
a second water pipe located at the bottom of the two water pipes;
an external welding part formed by welding an upper surface of the second water supply pipe and one end surface of the first water supply pipe; and
In the water supply pipe inner weld quality inspection apparatus comprising a; an inner weld formed by welding the other end surface of the second water pipe and the lower surface of the first water pipe,
a pair of pillars controlled by a control device, adjustable in length, spaced apart from each other by a predetermined distance, and installed in close contact with the inner circumferential surface of the inner welding part;
a first rod connecting the pair of pillars and rotatably installed at a constant speed by a first motor;
a body surrounding the outer surface of the first rod and installed to be movable on one side or the other side along the longitudinal direction of the first rod;
a second rod having a scanning device at one end and installed on one side of the main body, the length of which can be adjusted; and,
and an angle adjusting device for adjusting the angle at which the scanning device is in close contact with the outer surface of the inner welded portion so that the scanning device can be in close contact with the outer surface of the inner welded portion vertically.
Controlled by the control device, the length of the second rod is adjusted to bring the scanning device into close contact with the outer surface of the inner welding part,
As the first rod rotates in one direction, the main body and the second rod rotate together, and the scanning device rotates along the outer surface of the inner welded portion to inspect the welding state of the inner welded portion. Device.
According to claim 1,
A quality inspection device for internal welding of a water supply pipe provided with a rubber contact member at both ends of each of the pair of pillars.
3. The method of claim 2,
A water supply pipe inner weld quality inspection device provided with a first spring that is an elastic body between both ends of each of the contact member and the pair of pillars.
According to claim 1,
Each of the pair of pillars is divided into a first pillar, a joint and a second pillar,
Both ends of the joint part are opened so that the upper part of the first column and the lower part of the second column can be inserted,
At least one second motor controlled by a control device is provided inside the joint,
When the second motor rotates in one direction, the upper portion of the first column and the lower portion of the second column decrease the length of the column as it enters the joint portion, respectively,
When the second motor rotates in the other direction, the upper part of the first column and the lower part of the second column go out to the outside of the joint, and the length of the column increases.
According to claim 1,
The first motor includes a second gear provided inside one side of the first rod, one side of which is provided with a plurality of first protrusions formed to be spaced apart from each other at a predetermined distance on the outer surface,
A second protrusion to be inserted into the space between the plurality of first protrusions is formed on the inner surface of the first rod,
When the first motor rotates in one direction or the other by being controlled by the control device, as the second gear rotates together, the first protrusion and the second protrusion rotate while the first protrusion and the second protrusion are engaged while the first rod is also rotated together. A quality inspection device for internal welding parts of a water supply pipe that rotates in one direction or the other.
According to claim 1,
A plurality of recessed grooves are formed on the outer surface of the first rod at a predetermined distance along the longitudinal direction of the first rod and recessed;
A third motor for generating a driving force is provided inside the main body,
The third motor includes a third gear spaced apart at a predetermined distance so as to be insertable into the plurality of grooves on the outer surface, and provided with a plurality of insertion portions protruding and formed,
When the third motor is controlled by the control device to rotate in one direction or the other direction, the main body moves in one direction or the other direction along the first rod while entering or exiting the groove while the insertion part rotates together. Internal welding part quality inspection device.
According to claim 1,
One side of the main body includes a length adjusting member whose one side is open so that the second rod can enter or exit,
A fourth motor that is controlled by the control device to generate a driving force is provided inside the length adjusting member,
Controlled by the control device, when the fourth motor rotates in one direction, the lower portion of the second rod enters the inside of the length adjusting member,
When the fourth motor rotates in the other direction as controlled by the control device, the lower portion of the second rod goes out of the length adjusting member to the outside of the length adjusting member.
According to claim 1,
A water supply pipe inner weld quality inspection device further comprising a second spring that is an elastic body between the scanning device and the second rod.
9. The method of claim 8,
The angle adjusting device is a water supply pipe inner weld quality inspection device provided between the second spring and the scanning device.
According to claim 1,
The scanning device is an ultrasonic transducer capable of transmitting or receiving ultrasonic waves,
The ultrasonic probe is a water supply pipe inner weld quality inspection device for transmitting ultrasonic waves while forming a predetermined angle with the outer surface of the inner weld.
According to claim 1,
In one end of the second rod is controlled by the control device, including a photographing device for photographing an image of the direction in which the scanning device is installed, a water supply pipe internal welding quality inspection device.

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